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
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>
56 struct ip_tunnel_parm;
57 struct macsec_context;
63 /* 802.15.4 specific */
66 /* UDP Tunnel offloads */
67 struct udp_tunnel_info;
71 void netdev_set_default_ethtool_ops(struct net_device *dev,
72 const struct ethtool_ops *ops);
74 /* Backlog congestion levels */
75 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
76 #define NET_RX_DROP 1 /* packet dropped */
78 #define MAX_NEST_DEV 8
81 * Transmit return codes: transmit return codes originate from three different
84 * - qdisc return codes
85 * - driver transmit return codes
88 * Drivers are allowed to return any one of those in their hard_start_xmit()
89 * function. Real network devices commonly used with qdiscs should only return
90 * the driver transmit return codes though - when qdiscs are used, the actual
91 * transmission happens asynchronously, so the value is not propagated to
92 * higher layers. Virtual network devices transmit synchronously; in this case
93 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
94 * others are propagated to higher layers.
97 /* qdisc ->enqueue() return codes. */
98 #define NET_XMIT_SUCCESS 0x00
99 #define NET_XMIT_DROP 0x01 /* skb dropped */
100 #define NET_XMIT_CN 0x02 /* congestion notification */
101 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
103 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
104 * indicates that the device will soon be dropping packets, or already drops
105 * some packets of the same priority; prompting us to send less aggressively. */
106 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
107 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
109 /* Driver transmit return codes */
110 #define NETDEV_TX_MASK 0xf0
113 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
114 NETDEV_TX_OK = 0x00, /* driver took care of packet */
115 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
117 typedef enum netdev_tx netdev_tx_t;
120 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
121 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
123 static inline bool dev_xmit_complete(int rc)
126 * Positive cases with an skb consumed by a driver:
127 * - successful transmission (rc == NETDEV_TX_OK)
128 * - error while transmitting (rc < 0)
129 * - error while queueing to a different device (rc & NET_XMIT_MASK)
131 if (likely(rc < NET_XMIT_MASK))
138 * Compute the worst-case header length according to the protocols
142 #if defined(CONFIG_HYPERV_NET)
143 # define LL_MAX_HEADER 128
144 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
145 # if defined(CONFIG_MAC80211_MESH)
146 # define LL_MAX_HEADER 128
148 # define LL_MAX_HEADER 96
151 # define LL_MAX_HEADER 32
154 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
155 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
156 #define MAX_HEADER LL_MAX_HEADER
158 #define MAX_HEADER (LL_MAX_HEADER + 48)
162 * Old network device statistics. Fields are native words
163 * (unsigned long) so they can be read and written atomically.
166 struct net_device_stats {
167 unsigned long rx_packets;
168 unsigned long tx_packets;
169 unsigned long rx_bytes;
170 unsigned long tx_bytes;
171 unsigned long rx_errors;
172 unsigned long tx_errors;
173 unsigned long rx_dropped;
174 unsigned long tx_dropped;
175 unsigned long multicast;
176 unsigned long collisions;
177 unsigned long rx_length_errors;
178 unsigned long rx_over_errors;
179 unsigned long rx_crc_errors;
180 unsigned long rx_frame_errors;
181 unsigned long rx_fifo_errors;
182 unsigned long rx_missed_errors;
183 unsigned long tx_aborted_errors;
184 unsigned long tx_carrier_errors;
185 unsigned long tx_fifo_errors;
186 unsigned long tx_heartbeat_errors;
187 unsigned long tx_window_errors;
188 unsigned long rx_compressed;
189 unsigned long tx_compressed;
193 #include <linux/cache.h>
194 #include <linux/skbuff.h>
197 #include <linux/static_key.h>
198 extern struct static_key_false rps_needed;
199 extern struct static_key_false rfs_needed;
206 struct netdev_hw_addr {
207 struct list_head list;
208 unsigned char addr[MAX_ADDR_LEN];
210 #define NETDEV_HW_ADDR_T_LAN 1
211 #define NETDEV_HW_ADDR_T_SAN 2
212 #define NETDEV_HW_ADDR_T_SLAVE 3
213 #define NETDEV_HW_ADDR_T_UNICAST 4
214 #define NETDEV_HW_ADDR_T_MULTICAST 5
219 struct rcu_head rcu_head;
222 struct netdev_hw_addr_list {
223 struct list_head list;
227 #define netdev_hw_addr_list_count(l) ((l)->count)
228 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
229 #define netdev_hw_addr_list_for_each(ha, l) \
230 list_for_each_entry(ha, &(l)->list, list)
232 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
233 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
234 #define netdev_for_each_uc_addr(ha, dev) \
235 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
237 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
238 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
239 #define netdev_for_each_mc_addr(ha, dev) \
240 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
246 /* cached hardware header; allow for machine alignment needs. */
247 #define HH_DATA_MOD 16
248 #define HH_DATA_OFF(__len) \
249 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
250 #define HH_DATA_ALIGN(__len) \
251 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
252 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
255 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
257 * dev->hard_header_len ? (dev->hard_header_len +
258 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
260 * We could use other alignment values, but we must maintain the
261 * relationship HH alignment <= LL alignment.
263 #define LL_RESERVED_SPACE(dev) \
264 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
265 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
266 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
269 int (*create) (struct sk_buff *skb, struct net_device *dev,
270 unsigned short type, const void *daddr,
271 const void *saddr, unsigned int len);
272 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
273 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
274 void (*cache_update)(struct hh_cache *hh,
275 const struct net_device *dev,
276 const unsigned char *haddr);
277 bool (*validate)(const char *ll_header, unsigned int len);
278 __be16 (*parse_protocol)(const struct sk_buff *skb);
281 /* These flag bits are private to the generic network queueing
282 * layer; they may not be explicitly referenced by any other
286 enum netdev_state_t {
288 __LINK_STATE_PRESENT,
289 __LINK_STATE_NOCARRIER,
290 __LINK_STATE_LINKWATCH_PENDING,
291 __LINK_STATE_DORMANT,
292 __LINK_STATE_TESTING,
297 * This structure holds boot-time configured netdevice settings. They
298 * are then used in the device probing.
300 struct netdev_boot_setup {
304 #define NETDEV_BOOT_SETUP_MAX 8
306 int __init netdev_boot_setup(char *str);
309 struct list_head list;
314 * size of gro hash buckets, must less than bit number of
315 * napi_struct::gro_bitmask
317 #define GRO_HASH_BUCKETS 8
320 * Structure for NAPI scheduling similar to tasklet but with weighting
323 /* The poll_list must only be managed by the entity which
324 * changes the state of the NAPI_STATE_SCHED bit. This means
325 * whoever atomically sets that bit can add this napi_struct
326 * to the per-CPU poll_list, and whoever clears that bit
327 * can remove from the list right before clearing the bit.
329 struct list_head poll_list;
333 int defer_hard_irqs_count;
334 unsigned long gro_bitmask;
335 int (*poll)(struct napi_struct *, int);
336 #ifdef CONFIG_NETPOLL
339 struct net_device *dev;
340 struct gro_list gro_hash[GRO_HASH_BUCKETS];
342 struct list_head rx_list; /* Pending GRO_NORMAL skbs */
343 int rx_count; /* length of rx_list */
344 struct hrtimer timer;
345 struct list_head dev_list;
346 struct hlist_node napi_hash_node;
347 unsigned int napi_id;
351 NAPI_STATE_SCHED, /* Poll is scheduled */
352 NAPI_STATE_MISSED, /* reschedule a napi */
353 NAPI_STATE_DISABLE, /* Disable pending */
354 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
355 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
356 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
357 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
361 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
362 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
363 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
364 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
365 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
366 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
367 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
378 typedef enum gro_result gro_result_t;
381 * enum rx_handler_result - Possible return values for rx_handlers.
382 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
384 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
385 * case skb->dev was changed by rx_handler.
386 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
387 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
389 * rx_handlers are functions called from inside __netif_receive_skb(), to do
390 * special processing of the skb, prior to delivery to protocol handlers.
392 * Currently, a net_device can only have a single rx_handler registered. Trying
393 * to register a second rx_handler will return -EBUSY.
395 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
396 * To unregister a rx_handler on a net_device, use
397 * netdev_rx_handler_unregister().
399 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
402 * If the rx_handler consumed the skb in some way, it should return
403 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
404 * the skb to be delivered in some other way.
406 * If the rx_handler changed skb->dev, to divert the skb to another
407 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
408 * new device will be called if it exists.
410 * If the rx_handler decides the skb should be ignored, it should return
411 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
412 * are registered on exact device (ptype->dev == skb->dev).
414 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
415 * delivered, it should return RX_HANDLER_PASS.
417 * A device without a registered rx_handler will behave as if rx_handler
418 * returned RX_HANDLER_PASS.
421 enum rx_handler_result {
427 typedef enum rx_handler_result rx_handler_result_t;
428 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
430 void __napi_schedule(struct napi_struct *n);
431 void __napi_schedule_irqoff(struct napi_struct *n);
433 static inline bool napi_disable_pending(struct napi_struct *n)
435 return test_bit(NAPI_STATE_DISABLE, &n->state);
438 bool napi_schedule_prep(struct napi_struct *n);
441 * napi_schedule - schedule NAPI poll
444 * Schedule NAPI poll routine to be called if it is not already
447 static inline void napi_schedule(struct napi_struct *n)
449 if (napi_schedule_prep(n))
454 * napi_schedule_irqoff - schedule NAPI poll
457 * Variant of napi_schedule(), assuming hard irqs are masked.
459 static inline void napi_schedule_irqoff(struct napi_struct *n)
461 if (napi_schedule_prep(n))
462 __napi_schedule_irqoff(n);
465 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
466 static inline bool napi_reschedule(struct napi_struct *napi)
468 if (napi_schedule_prep(napi)) {
469 __napi_schedule(napi);
475 bool napi_complete_done(struct napi_struct *n, int work_done);
477 * napi_complete - NAPI processing complete
480 * Mark NAPI processing as complete.
481 * Consider using napi_complete_done() instead.
482 * Return false if device should avoid rearming interrupts.
484 static inline bool napi_complete(struct napi_struct *n)
486 return napi_complete_done(n, 0);
490 * napi_hash_del - remove a NAPI from global table
491 * @napi: NAPI context
493 * Warning: caller must observe RCU grace period
494 * before freeing memory containing @napi, if
495 * this function returns true.
496 * Note: core networking stack automatically calls it
497 * from netif_napi_del().
498 * Drivers might want to call this helper to combine all
499 * the needed RCU grace periods into a single one.
501 bool napi_hash_del(struct napi_struct *napi);
504 * napi_disable - prevent NAPI from scheduling
507 * Stop NAPI from being scheduled on this context.
508 * Waits till any outstanding processing completes.
510 void napi_disable(struct napi_struct *n);
513 * napi_enable - enable NAPI scheduling
516 * Resume NAPI from being scheduled on this context.
517 * Must be paired with napi_disable.
519 static inline void napi_enable(struct napi_struct *n)
521 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
522 smp_mb__before_atomic();
523 clear_bit(NAPI_STATE_SCHED, &n->state);
524 clear_bit(NAPI_STATE_NPSVC, &n->state);
528 * napi_synchronize - wait until NAPI is not running
531 * Wait until NAPI is done being scheduled on this context.
532 * Waits till any outstanding processing completes but
533 * does not disable future activations.
535 static inline void napi_synchronize(const struct napi_struct *n)
537 if (IS_ENABLED(CONFIG_SMP))
538 while (test_bit(NAPI_STATE_SCHED, &n->state))
545 * napi_if_scheduled_mark_missed - if napi is running, set the
549 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
552 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
554 unsigned long val, new;
557 val = READ_ONCE(n->state);
558 if (val & NAPIF_STATE_DISABLE)
561 if (!(val & NAPIF_STATE_SCHED))
564 new = val | NAPIF_STATE_MISSED;
565 } while (cmpxchg(&n->state, val, new) != val);
570 enum netdev_queue_state_t {
571 __QUEUE_STATE_DRV_XOFF,
572 __QUEUE_STATE_STACK_XOFF,
573 __QUEUE_STATE_FROZEN,
576 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
577 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
578 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
580 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
581 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
583 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
587 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
588 * netif_tx_* functions below are used to manipulate this flag. The
589 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
590 * queue independently. The netif_xmit_*stopped functions below are called
591 * to check if the queue has been stopped by the driver or stack (either
592 * of the XOFF bits are set in the state). Drivers should not need to call
593 * netif_xmit*stopped functions, they should only be using netif_tx_*.
596 struct netdev_queue {
600 struct net_device *dev;
601 struct Qdisc __rcu *qdisc;
602 struct Qdisc *qdisc_sleeping;
606 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
609 unsigned long tx_maxrate;
611 * Number of TX timeouts for this queue
612 * (/sys/class/net/DEV/Q/trans_timeout)
614 unsigned long trans_timeout;
616 /* Subordinate device that the queue has been assigned to */
617 struct net_device *sb_dev;
618 #ifdef CONFIG_XDP_SOCKETS
619 struct xdp_umem *umem;
624 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
627 * Time (in jiffies) of last Tx
629 unsigned long trans_start;
636 } ____cacheline_aligned_in_smp;
638 extern int sysctl_fb_tunnels_only_for_init_net;
639 extern int sysctl_devconf_inherit_init_net;
641 static inline bool net_has_fallback_tunnels(const struct net *net)
643 return net == &init_net ||
644 !IS_ENABLED(CONFIG_SYSCTL) ||
645 !sysctl_fb_tunnels_only_for_init_net;
648 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
650 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
657 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
659 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
666 * This structure holds an RPS map which can be of variable length. The
667 * map is an array of CPUs.
674 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
677 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
678 * tail pointer for that CPU's input queue at the time of last enqueue, and
679 * a hardware filter index.
681 struct rps_dev_flow {
684 unsigned int last_qtail;
686 #define RPS_NO_FILTER 0xffff
689 * The rps_dev_flow_table structure contains a table of flow mappings.
691 struct rps_dev_flow_table {
694 struct rps_dev_flow flows[];
696 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
697 ((_num) * sizeof(struct rps_dev_flow)))
700 * The rps_sock_flow_table contains mappings of flows to the last CPU
701 * on which they were processed by the application (set in recvmsg).
702 * Each entry is a 32bit value. Upper part is the high-order bits
703 * of flow hash, lower part is CPU number.
704 * rps_cpu_mask is used to partition the space, depending on number of
705 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
706 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
707 * meaning we use 32-6=26 bits for the hash.
709 struct rps_sock_flow_table {
712 u32 ents[] ____cacheline_aligned_in_smp;
714 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
716 #define RPS_NO_CPU 0xffff
718 extern u32 rps_cpu_mask;
719 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
721 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
725 unsigned int index = hash & table->mask;
726 u32 val = hash & ~rps_cpu_mask;
728 /* We only give a hint, preemption can change CPU under us */
729 val |= raw_smp_processor_id();
731 if (table->ents[index] != val)
732 table->ents[index] = val;
736 #ifdef CONFIG_RFS_ACCEL
737 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
740 #endif /* CONFIG_RPS */
742 /* This structure contains an instance of an RX queue. */
743 struct netdev_rx_queue {
745 struct rps_map __rcu *rps_map;
746 struct rps_dev_flow_table __rcu *rps_flow_table;
749 struct net_device *dev;
750 struct xdp_rxq_info xdp_rxq;
751 #ifdef CONFIG_XDP_SOCKETS
752 struct xdp_umem *umem;
754 } ____cacheline_aligned_in_smp;
757 * RX queue sysfs structures and functions.
759 struct rx_queue_attribute {
760 struct attribute attr;
761 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
762 ssize_t (*store)(struct netdev_rx_queue *queue,
763 const char *buf, size_t len);
768 * This structure holds an XPS map which can be of variable length. The
769 * map is an array of queues.
773 unsigned int alloc_len;
777 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
778 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
779 - sizeof(struct xps_map)) / sizeof(u16))
782 * This structure holds all XPS maps for device. Maps are indexed by CPU.
784 struct xps_dev_maps {
786 struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */
789 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
790 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
792 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
793 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
795 #endif /* CONFIG_XPS */
797 #define TC_MAX_QUEUE 16
798 #define TC_BITMASK 15
799 /* HW offloaded queuing disciplines txq count and offset maps */
800 struct netdev_tc_txq {
805 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
807 * This structure is to hold information about the device
808 * configured to run FCoE protocol stack.
810 struct netdev_fcoe_hbainfo {
811 char manufacturer[64];
812 char serial_number[64];
813 char hardware_version[64];
814 char driver_version[64];
815 char optionrom_version[64];
816 char firmware_version[64];
818 char model_description[256];
822 #define MAX_PHYS_ITEM_ID_LEN 32
824 /* This structure holds a unique identifier to identify some
825 * physical item (port for example) used by a netdevice.
827 struct netdev_phys_item_id {
828 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
829 unsigned char id_len;
832 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
833 struct netdev_phys_item_id *b)
835 return a->id_len == b->id_len &&
836 memcmp(a->id, b->id, a->id_len) == 0;
839 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
841 struct net_device *sb_dev);
844 TC_SETUP_QDISC_MQPRIO,
847 TC_SETUP_CLSMATCHALL,
857 TC_SETUP_QDISC_TAPRIO,
864 /* These structures hold the attributes of bpf state that are being passed
865 * to the netdevice through the bpf op.
867 enum bpf_netdev_command {
868 /* Set or clear a bpf program used in the earliest stages of packet
869 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
870 * is responsible for calling bpf_prog_put on any old progs that are
871 * stored. In case of error, the callee need not release the new prog
872 * reference, but on success it takes ownership and must bpf_prog_put
873 * when it is no longer used.
879 /* BPF program for offload callbacks, invoked at program load time. */
880 BPF_OFFLOAD_MAP_ALLOC,
881 BPF_OFFLOAD_MAP_FREE,
885 struct bpf_prog_offload_ops;
886 struct netlink_ext_ack;
888 struct xdp_dev_bulk_queue;
891 enum bpf_netdev_command command;
896 struct bpf_prog *prog;
897 struct netlink_ext_ack *extack;
899 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
902 /* flags with which program was installed */
905 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
907 struct bpf_offloaded_map *offmap;
909 /* XDP_SETUP_XSK_UMEM */
911 struct xdp_umem *umem;
917 /* Flags for ndo_xsk_wakeup. */
918 #define XDP_WAKEUP_RX (1 << 0)
919 #define XDP_WAKEUP_TX (1 << 1)
921 #ifdef CONFIG_XFRM_OFFLOAD
923 int (*xdo_dev_state_add) (struct xfrm_state *x);
924 void (*xdo_dev_state_delete) (struct xfrm_state *x);
925 void (*xdo_dev_state_free) (struct xfrm_state *x);
926 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
927 struct xfrm_state *x);
928 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
933 struct rcu_head rcuhead;
940 struct netdev_name_node {
941 struct hlist_node hlist;
942 struct list_head list;
943 struct net_device *dev;
947 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
948 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
950 struct netdev_net_notifier {
951 struct list_head list;
952 struct notifier_block *nb;
956 * This structure defines the management hooks for network devices.
957 * The following hooks can be defined; unless noted otherwise, they are
958 * optional and can be filled with a null pointer.
960 * int (*ndo_init)(struct net_device *dev);
961 * This function is called once when a network device is registered.
962 * The network device can use this for any late stage initialization
963 * or semantic validation. It can fail with an error code which will
964 * be propagated back to register_netdev.
966 * void (*ndo_uninit)(struct net_device *dev);
967 * This function is called when device is unregistered or when registration
968 * fails. It is not called if init fails.
970 * int (*ndo_open)(struct net_device *dev);
971 * This function is called when a network device transitions to the up
974 * int (*ndo_stop)(struct net_device *dev);
975 * This function is called when a network device transitions to the down
978 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
979 * struct net_device *dev);
980 * Called when a packet needs to be transmitted.
981 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
982 * the queue before that can happen; it's for obsolete devices and weird
983 * corner cases, but the stack really does a non-trivial amount
984 * of useless work if you return NETDEV_TX_BUSY.
985 * Required; cannot be NULL.
987 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
988 * struct net_device *dev
989 * netdev_features_t features);
990 * Called by core transmit path to determine if device is capable of
991 * performing offload operations on a given packet. This is to give
992 * the device an opportunity to implement any restrictions that cannot
993 * be otherwise expressed by feature flags. The check is called with
994 * the set of features that the stack has calculated and it returns
995 * those the driver believes to be appropriate.
997 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
998 * struct net_device *sb_dev);
999 * Called to decide which queue to use when device supports multiple
1002 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
1003 * This function is called to allow device receiver to make
1004 * changes to configuration when multicast or promiscuous is enabled.
1006 * void (*ndo_set_rx_mode)(struct net_device *dev);
1007 * This function is called device changes address list filtering.
1008 * If driver handles unicast address filtering, it should set
1009 * IFF_UNICAST_FLT in its priv_flags.
1011 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1012 * This function is called when the Media Access Control address
1013 * needs to be changed. If this interface is not defined, the
1014 * MAC address can not be changed.
1016 * int (*ndo_validate_addr)(struct net_device *dev);
1017 * Test if Media Access Control address is valid for the device.
1019 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1020 * Called when a user requests an ioctl which can't be handled by
1021 * the generic interface code. If not defined ioctls return
1022 * not supported error code.
1024 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1025 * Used to set network devices bus interface parameters. This interface
1026 * is retained for legacy reasons; new devices should use the bus
1027 * interface (PCI) for low level management.
1029 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1030 * Called when a user wants to change the Maximum Transfer Unit
1033 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
1034 * Callback used when the transmitter has not made any progress
1035 * for dev->watchdog ticks.
1037 * void (*ndo_get_stats64)(struct net_device *dev,
1038 * struct rtnl_link_stats64 *storage);
1039 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1040 * Called when a user wants to get the network device usage
1041 * statistics. Drivers must do one of the following:
1042 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1043 * rtnl_link_stats64 structure passed by the caller.
1044 * 2. Define @ndo_get_stats to update a net_device_stats structure
1045 * (which should normally be dev->stats) and return a pointer to
1046 * it. The structure may be changed asynchronously only if each
1047 * field is written atomically.
1048 * 3. Update dev->stats asynchronously and atomically, and define
1049 * neither operation.
1051 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1052 * Return true if this device supports offload stats of this attr_id.
1054 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1056 * Get statistics for offload operations by attr_id. Write it into the
1057 * attr_data pointer.
1059 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1060 * If device supports VLAN filtering this function is called when a
1061 * VLAN id is registered.
1063 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1064 * If device supports VLAN filtering this function is called when a
1065 * VLAN id is unregistered.
1067 * void (*ndo_poll_controller)(struct net_device *dev);
1069 * SR-IOV management functions.
1070 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1071 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1072 * u8 qos, __be16 proto);
1073 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1075 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1076 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1077 * int (*ndo_get_vf_config)(struct net_device *dev,
1078 * int vf, struct ifla_vf_info *ivf);
1079 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1080 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1081 * struct nlattr *port[]);
1083 * Enable or disable the VF ability to query its RSS Redirection Table and
1084 * Hash Key. This is needed since on some devices VF share this information
1085 * with PF and querying it may introduce a theoretical security risk.
1086 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1087 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1088 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1090 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1091 * This is always called from the stack with the rtnl lock held and netif
1092 * tx queues stopped. This allows the netdevice to perform queue
1093 * management safely.
1095 * Fiber Channel over Ethernet (FCoE) offload functions.
1096 * int (*ndo_fcoe_enable)(struct net_device *dev);
1097 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1098 * so the underlying device can perform whatever needed configuration or
1099 * initialization to support acceleration of FCoE traffic.
1101 * int (*ndo_fcoe_disable)(struct net_device *dev);
1102 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1103 * so the underlying device can perform whatever needed clean-ups to
1104 * stop supporting acceleration of FCoE traffic.
1106 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1107 * struct scatterlist *sgl, unsigned int sgc);
1108 * Called when the FCoE Initiator wants to initialize an I/O that
1109 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1110 * perform necessary setup and returns 1 to indicate the device is set up
1111 * successfully to perform DDP on this I/O, otherwise this returns 0.
1113 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1114 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1115 * indicated by the FC exchange id 'xid', so the underlying device can
1116 * clean up and reuse resources for later DDP requests.
1118 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1119 * struct scatterlist *sgl, unsigned int sgc);
1120 * Called when the FCoE Target wants to initialize an I/O that
1121 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1122 * perform necessary setup and returns 1 to indicate the device is set up
1123 * successfully to perform DDP on this I/O, otherwise this returns 0.
1125 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1126 * struct netdev_fcoe_hbainfo *hbainfo);
1127 * Called when the FCoE Protocol stack wants information on the underlying
1128 * device. This information is utilized by the FCoE protocol stack to
1129 * register attributes with Fiber Channel management service as per the
1130 * FC-GS Fabric Device Management Information(FDMI) specification.
1132 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1133 * Called when the underlying device wants to override default World Wide
1134 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1135 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1136 * protocol stack to use.
1139 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1140 * u16 rxq_index, u32 flow_id);
1141 * Set hardware filter for RFS. rxq_index is the target queue index;
1142 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1143 * Return the filter ID on success, or a negative error code.
1145 * Slave management functions (for bridge, bonding, etc).
1146 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1147 * Called to make another netdev an underling.
1149 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1150 * Called to release previously enslaved netdev.
1152 * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev,
1153 * struct sk_buff *skb,
1155 * Get the xmit slave of master device. If all_slaves is true, function
1156 * assume all the slaves can transmit.
1158 * Feature/offload setting functions.
1159 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1160 * netdev_features_t features);
1161 * Adjusts the requested feature flags according to device-specific
1162 * constraints, and returns the resulting flags. Must not modify
1165 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1166 * Called to update device configuration to new features. Passed
1167 * feature set might be less than what was returned by ndo_fix_features()).
1168 * Must return >0 or -errno if it changed dev->features itself.
1170 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1171 * struct net_device *dev,
1172 * const unsigned char *addr, u16 vid, u16 flags,
1173 * struct netlink_ext_ack *extack);
1174 * Adds an FDB entry to dev for addr.
1175 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1176 * struct net_device *dev,
1177 * const unsigned char *addr, u16 vid)
1178 * Deletes the FDB entry from dev coresponding to addr.
1179 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1180 * struct net_device *dev, struct net_device *filter_dev,
1182 * Used to add FDB entries to dump requests. Implementers should add
1183 * entries to skb and update idx with the number of entries.
1185 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1186 * u16 flags, struct netlink_ext_ack *extack)
1187 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1188 * struct net_device *dev, u32 filter_mask,
1190 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1193 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1194 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1195 * which do not represent real hardware may define this to allow their
1196 * userspace components to manage their virtual carrier state. Devices
1197 * that determine carrier state from physical hardware properties (eg
1198 * network cables) or protocol-dependent mechanisms (eg
1199 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1201 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1202 * struct netdev_phys_item_id *ppid);
1203 * Called to get ID of physical port of this device. If driver does
1204 * not implement this, it is assumed that the hw is not able to have
1205 * multiple net devices on single physical port.
1207 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1208 * struct netdev_phys_item_id *ppid)
1209 * Called to get the parent ID of the physical port of this device.
1211 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1212 * struct udp_tunnel_info *ti);
1213 * Called by UDP tunnel to notify a driver about the UDP port and socket
1214 * address family that a UDP tunnel is listnening to. It is called only
1215 * when a new port starts listening. The operation is protected by the
1218 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1219 * struct udp_tunnel_info *ti);
1220 * Called by UDP tunnel to notify the driver about a UDP port and socket
1221 * address family that the UDP tunnel is not listening to anymore. The
1222 * operation is protected by the RTNL.
1224 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1225 * struct net_device *dev)
1226 * Called by upper layer devices to accelerate switching or other
1227 * station functionality into hardware. 'pdev is the lowerdev
1228 * to use for the offload and 'dev' is the net device that will
1229 * back the offload. Returns a pointer to the private structure
1230 * the upper layer will maintain.
1231 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1232 * Called by upper layer device to delete the station created
1233 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1234 * the station and priv is the structure returned by the add
1236 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1237 * int queue_index, u32 maxrate);
1238 * Called when a user wants to set a max-rate limitation of specific
1240 * int (*ndo_get_iflink)(const struct net_device *dev);
1241 * Called to get the iflink value of this device.
1242 * void (*ndo_change_proto_down)(struct net_device *dev,
1244 * This function is used to pass protocol port error state information
1245 * to the switch driver. The switch driver can react to the proto_down
1246 * by doing a phys down on the associated switch port.
1247 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1248 * This function is used to get egress tunnel information for given skb.
1249 * This is useful for retrieving outer tunnel header parameters while
1251 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1252 * This function is used to specify the headroom that the skb must
1253 * consider when allocation skb during packet reception. Setting
1254 * appropriate rx headroom value allows avoiding skb head copy on
1255 * forward. Setting a negative value resets the rx headroom to the
1257 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1258 * This function is used to set or query state related to XDP on the
1259 * netdevice and manage BPF offload. See definition of
1260 * enum bpf_netdev_command for details.
1261 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1263 * This function is used to submit @n XDP packets for transmit on a
1264 * netdevice. Returns number of frames successfully transmitted, frames
1265 * that got dropped are freed/returned via xdp_return_frame().
1266 * Returns negative number, means general error invoking ndo, meaning
1267 * no frames were xmit'ed and core-caller will free all frames.
1268 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1269 * This function is used to wake up the softirq, ksoftirqd or kthread
1270 * responsible for sending and/or receiving packets on a specific
1271 * queue id bound to an AF_XDP socket. The flags field specifies if
1272 * only RX, only Tx, or both should be woken up using the flags
1273 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1274 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1275 * Get devlink port instance associated with a given netdev.
1276 * Called with a reference on the netdevice and devlink locks only,
1277 * rtnl_lock is not held.
1278 * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *p,
1280 * Add, change, delete or get information on an IPv4 tunnel.
1282 struct net_device_ops {
1283 int (*ndo_init)(struct net_device *dev);
1284 void (*ndo_uninit)(struct net_device *dev);
1285 int (*ndo_open)(struct net_device *dev);
1286 int (*ndo_stop)(struct net_device *dev);
1287 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1288 struct net_device *dev);
1289 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1290 struct net_device *dev,
1291 netdev_features_t features);
1292 u16 (*ndo_select_queue)(struct net_device *dev,
1293 struct sk_buff *skb,
1294 struct net_device *sb_dev);
1295 void (*ndo_change_rx_flags)(struct net_device *dev,
1297 void (*ndo_set_rx_mode)(struct net_device *dev);
1298 int (*ndo_set_mac_address)(struct net_device *dev,
1300 int (*ndo_validate_addr)(struct net_device *dev);
1301 int (*ndo_do_ioctl)(struct net_device *dev,
1302 struct ifreq *ifr, int cmd);
1303 int (*ndo_set_config)(struct net_device *dev,
1305 int (*ndo_change_mtu)(struct net_device *dev,
1307 int (*ndo_neigh_setup)(struct net_device *dev,
1308 struct neigh_parms *);
1309 void (*ndo_tx_timeout) (struct net_device *dev,
1310 unsigned int txqueue);
1312 void (*ndo_get_stats64)(struct net_device *dev,
1313 struct rtnl_link_stats64 *storage);
1314 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1315 int (*ndo_get_offload_stats)(int attr_id,
1316 const struct net_device *dev,
1318 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1320 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1321 __be16 proto, u16 vid);
1322 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1323 __be16 proto, u16 vid);
1324 #ifdef CONFIG_NET_POLL_CONTROLLER
1325 void (*ndo_poll_controller)(struct net_device *dev);
1326 int (*ndo_netpoll_setup)(struct net_device *dev,
1327 struct netpoll_info *info);
1328 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1330 int (*ndo_set_vf_mac)(struct net_device *dev,
1331 int queue, u8 *mac);
1332 int (*ndo_set_vf_vlan)(struct net_device *dev,
1333 int queue, u16 vlan,
1334 u8 qos, __be16 proto);
1335 int (*ndo_set_vf_rate)(struct net_device *dev,
1336 int vf, int min_tx_rate,
1338 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1339 int vf, bool setting);
1340 int (*ndo_set_vf_trust)(struct net_device *dev,
1341 int vf, bool setting);
1342 int (*ndo_get_vf_config)(struct net_device *dev,
1344 struct ifla_vf_info *ivf);
1345 int (*ndo_set_vf_link_state)(struct net_device *dev,
1346 int vf, int link_state);
1347 int (*ndo_get_vf_stats)(struct net_device *dev,
1349 struct ifla_vf_stats
1351 int (*ndo_set_vf_port)(struct net_device *dev,
1353 struct nlattr *port[]);
1354 int (*ndo_get_vf_port)(struct net_device *dev,
1355 int vf, struct sk_buff *skb);
1356 int (*ndo_get_vf_guid)(struct net_device *dev,
1358 struct ifla_vf_guid *node_guid,
1359 struct ifla_vf_guid *port_guid);
1360 int (*ndo_set_vf_guid)(struct net_device *dev,
1363 int (*ndo_set_vf_rss_query_en)(
1364 struct net_device *dev,
1365 int vf, bool setting);
1366 int (*ndo_setup_tc)(struct net_device *dev,
1367 enum tc_setup_type type,
1369 #if IS_ENABLED(CONFIG_FCOE)
1370 int (*ndo_fcoe_enable)(struct net_device *dev);
1371 int (*ndo_fcoe_disable)(struct net_device *dev);
1372 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1374 struct scatterlist *sgl,
1376 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1378 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1380 struct scatterlist *sgl,
1382 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1383 struct netdev_fcoe_hbainfo *hbainfo);
1386 #if IS_ENABLED(CONFIG_LIBFCOE)
1387 #define NETDEV_FCOE_WWNN 0
1388 #define NETDEV_FCOE_WWPN 1
1389 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1390 u64 *wwn, int type);
1393 #ifdef CONFIG_RFS_ACCEL
1394 int (*ndo_rx_flow_steer)(struct net_device *dev,
1395 const struct sk_buff *skb,
1399 int (*ndo_add_slave)(struct net_device *dev,
1400 struct net_device *slave_dev,
1401 struct netlink_ext_ack *extack);
1402 int (*ndo_del_slave)(struct net_device *dev,
1403 struct net_device *slave_dev);
1404 struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev,
1405 struct sk_buff *skb,
1407 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1408 netdev_features_t features);
1409 int (*ndo_set_features)(struct net_device *dev,
1410 netdev_features_t features);
1411 int (*ndo_neigh_construct)(struct net_device *dev,
1412 struct neighbour *n);
1413 void (*ndo_neigh_destroy)(struct net_device *dev,
1414 struct neighbour *n);
1416 int (*ndo_fdb_add)(struct ndmsg *ndm,
1417 struct nlattr *tb[],
1418 struct net_device *dev,
1419 const unsigned char *addr,
1422 struct netlink_ext_ack *extack);
1423 int (*ndo_fdb_del)(struct ndmsg *ndm,
1424 struct nlattr *tb[],
1425 struct net_device *dev,
1426 const unsigned char *addr,
1428 int (*ndo_fdb_dump)(struct sk_buff *skb,
1429 struct netlink_callback *cb,
1430 struct net_device *dev,
1431 struct net_device *filter_dev,
1433 int (*ndo_fdb_get)(struct sk_buff *skb,
1434 struct nlattr *tb[],
1435 struct net_device *dev,
1436 const unsigned char *addr,
1437 u16 vid, u32 portid, u32 seq,
1438 struct netlink_ext_ack *extack);
1439 int (*ndo_bridge_setlink)(struct net_device *dev,
1440 struct nlmsghdr *nlh,
1442 struct netlink_ext_ack *extack);
1443 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1445 struct net_device *dev,
1448 int (*ndo_bridge_dellink)(struct net_device *dev,
1449 struct nlmsghdr *nlh,
1451 int (*ndo_change_carrier)(struct net_device *dev,
1453 int (*ndo_get_phys_port_id)(struct net_device *dev,
1454 struct netdev_phys_item_id *ppid);
1455 int (*ndo_get_port_parent_id)(struct net_device *dev,
1456 struct netdev_phys_item_id *ppid);
1457 int (*ndo_get_phys_port_name)(struct net_device *dev,
1458 char *name, size_t len);
1459 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1460 struct udp_tunnel_info *ti);
1461 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1462 struct udp_tunnel_info *ti);
1463 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1464 struct net_device *dev);
1465 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1468 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1471 int (*ndo_get_iflink)(const struct net_device *dev);
1472 int (*ndo_change_proto_down)(struct net_device *dev,
1474 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1475 struct sk_buff *skb);
1476 void (*ndo_set_rx_headroom)(struct net_device *dev,
1477 int needed_headroom);
1478 int (*ndo_bpf)(struct net_device *dev,
1479 struct netdev_bpf *bpf);
1480 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1481 struct xdp_frame **xdp,
1483 int (*ndo_xsk_wakeup)(struct net_device *dev,
1484 u32 queue_id, u32 flags);
1485 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1486 int (*ndo_tunnel_ctl)(struct net_device *dev,
1487 struct ip_tunnel_parm *p, int cmd);
1491 * enum net_device_priv_flags - &struct net_device priv_flags
1493 * These are the &struct net_device, they are only set internally
1494 * by drivers and used in the kernel. These flags are invisible to
1495 * userspace; this means that the order of these flags can change
1496 * during any kernel release.
1498 * You should have a pretty good reason to be extending these flags.
1500 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1501 * @IFF_EBRIDGE: Ethernet bridging device
1502 * @IFF_BONDING: bonding master or slave
1503 * @IFF_ISATAP: ISATAP interface (RFC4214)
1504 * @IFF_WAN_HDLC: WAN HDLC device
1505 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1507 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1508 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1509 * @IFF_MACVLAN_PORT: device used as macvlan port
1510 * @IFF_BRIDGE_PORT: device used as bridge port
1511 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1512 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1513 * @IFF_UNICAST_FLT: Supports unicast filtering
1514 * @IFF_TEAM_PORT: device used as team port
1515 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1516 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1517 * change when it's running
1518 * @IFF_MACVLAN: Macvlan device
1519 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1520 * underlying stacked devices
1521 * @IFF_L3MDEV_MASTER: device is an L3 master device
1522 * @IFF_NO_QUEUE: device can run without qdisc attached
1523 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1524 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1525 * @IFF_TEAM: device is a team device
1526 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1527 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1528 * entity (i.e. the master device for bridged veth)
1529 * @IFF_MACSEC: device is a MACsec device
1530 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1531 * @IFF_FAILOVER: device is a failover master device
1532 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1533 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1534 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1536 enum netdev_priv_flags {
1537 IFF_802_1Q_VLAN = 1<<0,
1541 IFF_WAN_HDLC = 1<<4,
1542 IFF_XMIT_DST_RELEASE = 1<<5,
1543 IFF_DONT_BRIDGE = 1<<6,
1544 IFF_DISABLE_NETPOLL = 1<<7,
1545 IFF_MACVLAN_PORT = 1<<8,
1546 IFF_BRIDGE_PORT = 1<<9,
1547 IFF_OVS_DATAPATH = 1<<10,
1548 IFF_TX_SKB_SHARING = 1<<11,
1549 IFF_UNICAST_FLT = 1<<12,
1550 IFF_TEAM_PORT = 1<<13,
1551 IFF_SUPP_NOFCS = 1<<14,
1552 IFF_LIVE_ADDR_CHANGE = 1<<15,
1553 IFF_MACVLAN = 1<<16,
1554 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1555 IFF_L3MDEV_MASTER = 1<<18,
1556 IFF_NO_QUEUE = 1<<19,
1557 IFF_OPENVSWITCH = 1<<20,
1558 IFF_L3MDEV_SLAVE = 1<<21,
1560 IFF_RXFH_CONFIGURED = 1<<23,
1561 IFF_PHONY_HEADROOM = 1<<24,
1563 IFF_NO_RX_HANDLER = 1<<26,
1564 IFF_FAILOVER = 1<<27,
1565 IFF_FAILOVER_SLAVE = 1<<28,
1566 IFF_L3MDEV_RX_HANDLER = 1<<29,
1567 IFF_LIVE_RENAME_OK = 1<<30,
1570 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1571 #define IFF_EBRIDGE IFF_EBRIDGE
1572 #define IFF_BONDING IFF_BONDING
1573 #define IFF_ISATAP IFF_ISATAP
1574 #define IFF_WAN_HDLC IFF_WAN_HDLC
1575 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1576 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1577 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1578 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1579 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1580 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1581 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1582 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1583 #define IFF_TEAM_PORT IFF_TEAM_PORT
1584 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1585 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1586 #define IFF_MACVLAN IFF_MACVLAN
1587 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1588 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1589 #define IFF_NO_QUEUE IFF_NO_QUEUE
1590 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1591 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1592 #define IFF_TEAM IFF_TEAM
1593 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1594 #define IFF_MACSEC IFF_MACSEC
1595 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1596 #define IFF_FAILOVER IFF_FAILOVER
1597 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1598 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1599 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1602 * struct net_device - The DEVICE structure.
1604 * Actually, this whole structure is a big mistake. It mixes I/O
1605 * data with strictly "high-level" data, and it has to know about
1606 * almost every data structure used in the INET module.
1608 * @name: This is the first field of the "visible" part of this structure
1609 * (i.e. as seen by users in the "Space.c" file). It is the name
1612 * @name_node: Name hashlist node
1613 * @ifalias: SNMP alias
1614 * @mem_end: Shared memory end
1615 * @mem_start: Shared memory start
1616 * @base_addr: Device I/O address
1617 * @irq: Device IRQ number
1619 * @state: Generic network queuing layer state, see netdev_state_t
1620 * @dev_list: The global list of network devices
1621 * @napi_list: List entry used for polling NAPI devices
1622 * @unreg_list: List entry when we are unregistering the
1623 * device; see the function unregister_netdev
1624 * @close_list: List entry used when we are closing the device
1625 * @ptype_all: Device-specific packet handlers for all protocols
1626 * @ptype_specific: Device-specific, protocol-specific packet handlers
1628 * @adj_list: Directly linked devices, like slaves for bonding
1629 * @features: Currently active device features
1630 * @hw_features: User-changeable features
1632 * @wanted_features: User-requested features
1633 * @vlan_features: Mask of features inheritable by VLAN devices
1635 * @hw_enc_features: Mask of features inherited by encapsulating devices
1636 * This field indicates what encapsulation
1637 * offloads the hardware is capable of doing,
1638 * and drivers will need to set them appropriately.
1640 * @mpls_features: Mask of features inheritable by MPLS
1641 * @gso_partial_features: value(s) from NETIF_F_GSO\*
1643 * @ifindex: interface index
1644 * @group: The group the device belongs to
1646 * @stats: Statistics struct, which was left as a legacy, use
1647 * rtnl_link_stats64 instead
1649 * @rx_dropped: Dropped packets by core network,
1650 * do not use this in drivers
1651 * @tx_dropped: Dropped packets by core network,
1652 * do not use this in drivers
1653 * @rx_nohandler: nohandler dropped packets by core network on
1654 * inactive devices, do not use this in drivers
1655 * @carrier_up_count: Number of times the carrier has been up
1656 * @carrier_down_count: Number of times the carrier has been down
1658 * @wireless_handlers: List of functions to handle Wireless Extensions,
1660 * see <net/iw_handler.h> for details.
1661 * @wireless_data: Instance data managed by the core of wireless extensions
1663 * @netdev_ops: Includes several pointers to callbacks,
1664 * if one wants to override the ndo_*() functions
1665 * @ethtool_ops: Management operations
1666 * @l3mdev_ops: Layer 3 master device operations
1667 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1668 * discovery handling. Necessary for e.g. 6LoWPAN.
1669 * @xfrmdev_ops: Transformation offload operations
1670 * @tlsdev_ops: Transport Layer Security offload operations
1671 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1672 * of Layer 2 headers.
1674 * @flags: Interface flags (a la BSD)
1675 * @priv_flags: Like 'flags' but invisible to userspace,
1676 * see if.h for the definitions
1677 * @gflags: Global flags ( kept as legacy )
1678 * @padded: How much padding added by alloc_netdev()
1679 * @operstate: RFC2863 operstate
1680 * @link_mode: Mapping policy to operstate
1681 * @if_port: Selectable AUI, TP, ...
1683 * @mtu: Interface MTU value
1684 * @min_mtu: Interface Minimum MTU value
1685 * @max_mtu: Interface Maximum MTU value
1686 * @type: Interface hardware type
1687 * @hard_header_len: Maximum hardware header length.
1688 * @min_header_len: Minimum hardware header length
1690 * @needed_headroom: Extra headroom the hardware may need, but not in all
1691 * cases can this be guaranteed
1692 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1693 * cases can this be guaranteed. Some cases also use
1694 * LL_MAX_HEADER instead to allocate the skb
1696 * interface address info:
1698 * @perm_addr: Permanent hw address
1699 * @addr_assign_type: Hw address assignment type
1700 * @addr_len: Hardware address length
1701 * @upper_level: Maximum depth level of upper devices.
1702 * @lower_level: Maximum depth level of lower devices.
1703 * @neigh_priv_len: Used in neigh_alloc()
1704 * @dev_id: Used to differentiate devices that share
1705 * the same link layer address
1706 * @dev_port: Used to differentiate devices that share
1708 * @addr_list_lock: XXX: need comments on this one
1709 * @name_assign_type: network interface name assignment type
1710 * @uc_promisc: Counter that indicates promiscuous mode
1711 * has been enabled due to the need to listen to
1712 * additional unicast addresses in a device that
1713 * does not implement ndo_set_rx_mode()
1714 * @uc: unicast mac addresses
1715 * @mc: multicast mac addresses
1716 * @dev_addrs: list of device hw addresses
1717 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1718 * @promiscuity: Number of times the NIC is told to work in
1719 * promiscuous mode; if it becomes 0 the NIC will
1720 * exit promiscuous mode
1721 * @allmulti: Counter, enables or disables allmulticast mode
1723 * @vlan_info: VLAN info
1724 * @dsa_ptr: dsa specific data
1725 * @tipc_ptr: TIPC specific data
1726 * @atalk_ptr: AppleTalk link
1727 * @ip_ptr: IPv4 specific data
1728 * @dn_ptr: DECnet specific data
1729 * @ip6_ptr: IPv6 specific data
1730 * @ax25_ptr: AX.25 specific data
1731 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1732 * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network
1734 * @mpls_ptr: mpls_dev struct pointer
1736 * @dev_addr: Hw address (before bcast,
1737 * because most packets are unicast)
1739 * @_rx: Array of RX queues
1740 * @num_rx_queues: Number of RX queues
1741 * allocated at register_netdev() time
1742 * @real_num_rx_queues: Number of RX queues currently active in device
1743 * @xdp_prog: XDP sockets filter program pointer
1744 * @gro_flush_timeout: timeout for GRO layer in NAPI
1746 * @rx_handler: handler for received packets
1747 * @rx_handler_data: XXX: need comments on this one
1748 * @miniq_ingress: ingress/clsact qdisc specific data for
1749 * ingress processing
1750 * @ingress_queue: XXX: need comments on this one
1751 * @nf_hooks_ingress: netfilter hooks executed for ingress packets
1752 * @broadcast: hw bcast address
1754 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1755 * indexed by RX queue number. Assigned by driver.
1756 * This must only be set if the ndo_rx_flow_steer
1757 * operation is defined
1758 * @index_hlist: Device index hash chain
1760 * @_tx: Array of TX queues
1761 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1762 * @real_num_tx_queues: Number of TX queues currently active in device
1763 * @qdisc: Root qdisc from userspace point of view
1764 * @tx_queue_len: Max frames per queue allowed
1765 * @tx_global_lock: XXX: need comments on this one
1766 * @xdp_bulkq: XDP device bulk queue
1767 * @xps_cpus_map: all CPUs map for XPS device
1768 * @xps_rxqs_map: all RXQs map for XPS device
1770 * @xps_maps: XXX: need comments on this one
1771 * @miniq_egress: clsact qdisc specific data for
1773 * @qdisc_hash: qdisc hash table
1774 * @watchdog_timeo: Represents the timeout that is used by
1775 * the watchdog (see dev_watchdog())
1776 * @watchdog_timer: List of timers
1778 * @pcpu_refcnt: Number of references to this device
1779 * @todo_list: Delayed register/unregister
1780 * @link_watch_list: XXX: need comments on this one
1782 * @reg_state: Register/unregister state machine
1783 * @dismantle: Device is going to be freed
1784 * @rtnl_link_state: This enum represents the phases of creating
1787 * @needs_free_netdev: Should unregister perform free_netdev?
1788 * @priv_destructor: Called from unregister
1789 * @npinfo: XXX: need comments on this one
1790 * @nd_net: Network namespace this network device is inside
1792 * @ml_priv: Mid-layer private
1793 * @lstats: Loopback statistics
1794 * @tstats: Tunnel statistics
1795 * @dstats: Dummy statistics
1796 * @vstats: Virtual ethernet statistics
1801 * @dev: Class/net/name entry
1802 * @sysfs_groups: Space for optional device, statistics and wireless
1805 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1806 * @rtnl_link_ops: Rtnl_link_ops
1808 * @gso_max_size: Maximum size of generic segmentation offload
1809 * @gso_max_segs: Maximum number of segments that can be passed to the
1812 * @dcbnl_ops: Data Center Bridging netlink ops
1813 * @num_tc: Number of traffic classes in the net device
1814 * @tc_to_txq: XXX: need comments on this one
1815 * @prio_tc_map: XXX: need comments on this one
1817 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1819 * @priomap: XXX: need comments on this one
1820 * @phydev: Physical device may attach itself
1821 * for hardware timestamping
1822 * @sfp_bus: attached &struct sfp_bus structure.
1824 * @addr_list_lock_key: lockdep class annotating
1825 * net_device->addr_list_lock spinlock
1826 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1827 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1829 * @proto_down: protocol port state information can be sent to the
1830 * switch driver and used to set the phys state of the
1833 * @wol_enabled: Wake-on-LAN is enabled
1835 * @net_notifier_list: List of per-net netdev notifier block
1836 * that follow this device when it is moved
1837 * to another network namespace.
1839 * @macsec_ops: MACsec offloading ops
1841 * FIXME: cleanup struct net_device such that network protocol info
1846 char name[IFNAMSIZ];
1847 struct netdev_name_node *name_node;
1848 struct dev_ifalias __rcu *ifalias;
1850 * I/O specific fields
1851 * FIXME: Merge these and struct ifmap into one
1853 unsigned long mem_end;
1854 unsigned long mem_start;
1855 unsigned long base_addr;
1859 * Some hardware also needs these fields (state,dev_list,
1860 * napi_list,unreg_list,close_list) but they are not
1861 * part of the usual set specified in Space.c.
1864 unsigned long state;
1866 struct list_head dev_list;
1867 struct list_head napi_list;
1868 struct list_head unreg_list;
1869 struct list_head close_list;
1870 struct list_head ptype_all;
1871 struct list_head ptype_specific;
1874 struct list_head upper;
1875 struct list_head lower;
1878 netdev_features_t features;
1879 netdev_features_t hw_features;
1880 netdev_features_t wanted_features;
1881 netdev_features_t vlan_features;
1882 netdev_features_t hw_enc_features;
1883 netdev_features_t mpls_features;
1884 netdev_features_t gso_partial_features;
1889 struct net_device_stats stats;
1891 atomic_long_t rx_dropped;
1892 atomic_long_t tx_dropped;
1893 atomic_long_t rx_nohandler;
1895 /* Stats to monitor link on/off, flapping */
1896 atomic_t carrier_up_count;
1897 atomic_t carrier_down_count;
1899 #ifdef CONFIG_WIRELESS_EXT
1900 const struct iw_handler_def *wireless_handlers;
1901 struct iw_public_data *wireless_data;
1903 const struct net_device_ops *netdev_ops;
1904 const struct ethtool_ops *ethtool_ops;
1905 #ifdef CONFIG_NET_L3_MASTER_DEV
1906 const struct l3mdev_ops *l3mdev_ops;
1908 #if IS_ENABLED(CONFIG_IPV6)
1909 const struct ndisc_ops *ndisc_ops;
1912 #ifdef CONFIG_XFRM_OFFLOAD
1913 const struct xfrmdev_ops *xfrmdev_ops;
1916 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1917 const struct tlsdev_ops *tlsdev_ops;
1920 const struct header_ops *header_ops;
1923 unsigned int priv_flags;
1925 unsigned short gflags;
1926 unsigned short padded;
1928 unsigned char operstate;
1929 unsigned char link_mode;
1931 unsigned char if_port;
1934 /* Note : dev->mtu is often read without holding a lock.
1935 * Writers usually hold RTNL.
1936 * It is recommended to use READ_ONCE() to annotate the reads,
1937 * and to use WRITE_ONCE() to annotate the writes.
1940 unsigned int min_mtu;
1941 unsigned int max_mtu;
1942 unsigned short type;
1943 unsigned short hard_header_len;
1944 unsigned char min_header_len;
1946 unsigned short needed_headroom;
1947 unsigned short needed_tailroom;
1949 /* Interface address info. */
1950 unsigned char perm_addr[MAX_ADDR_LEN];
1951 unsigned char addr_assign_type;
1952 unsigned char addr_len;
1953 unsigned char upper_level;
1954 unsigned char lower_level;
1955 unsigned short neigh_priv_len;
1956 unsigned short dev_id;
1957 unsigned short dev_port;
1958 spinlock_t addr_list_lock;
1959 unsigned char name_assign_type;
1961 struct netdev_hw_addr_list uc;
1962 struct netdev_hw_addr_list mc;
1963 struct netdev_hw_addr_list dev_addrs;
1966 struct kset *queues_kset;
1968 unsigned int promiscuity;
1969 unsigned int allmulti;
1972 /* Protocol-specific pointers */
1974 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1975 struct vlan_info __rcu *vlan_info;
1977 #if IS_ENABLED(CONFIG_NET_DSA)
1978 struct dsa_port *dsa_ptr;
1980 #if IS_ENABLED(CONFIG_TIPC)
1981 struct tipc_bearer __rcu *tipc_ptr;
1983 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1986 struct in_device __rcu *ip_ptr;
1987 #if IS_ENABLED(CONFIG_DECNET)
1988 struct dn_dev __rcu *dn_ptr;
1990 struct inet6_dev __rcu *ip6_ptr;
1991 #if IS_ENABLED(CONFIG_AX25)
1994 struct wireless_dev *ieee80211_ptr;
1995 struct wpan_dev *ieee802154_ptr;
1996 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1997 struct mpls_dev __rcu *mpls_ptr;
2001 * Cache lines mostly used on receive path (including eth_type_trans())
2003 /* Interface address info used in eth_type_trans() */
2004 unsigned char *dev_addr;
2006 struct netdev_rx_queue *_rx;
2007 unsigned int num_rx_queues;
2008 unsigned int real_num_rx_queues;
2010 struct bpf_prog __rcu *xdp_prog;
2011 unsigned long gro_flush_timeout;
2012 int napi_defer_hard_irqs;
2013 rx_handler_func_t __rcu *rx_handler;
2014 void __rcu *rx_handler_data;
2016 #ifdef CONFIG_NET_CLS_ACT
2017 struct mini_Qdisc __rcu *miniq_ingress;
2019 struct netdev_queue __rcu *ingress_queue;
2020 #ifdef CONFIG_NETFILTER_INGRESS
2021 struct nf_hook_entries __rcu *nf_hooks_ingress;
2024 unsigned char broadcast[MAX_ADDR_LEN];
2025 #ifdef CONFIG_RFS_ACCEL
2026 struct cpu_rmap *rx_cpu_rmap;
2028 struct hlist_node index_hlist;
2031 * Cache lines mostly used on transmit path
2033 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
2034 unsigned int num_tx_queues;
2035 unsigned int real_num_tx_queues;
2036 struct Qdisc *qdisc;
2037 unsigned int tx_queue_len;
2038 spinlock_t tx_global_lock;
2040 struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
2043 struct xps_dev_maps __rcu *xps_cpus_map;
2044 struct xps_dev_maps __rcu *xps_rxqs_map;
2046 #ifdef CONFIG_NET_CLS_ACT
2047 struct mini_Qdisc __rcu *miniq_egress;
2050 #ifdef CONFIG_NET_SCHED
2051 DECLARE_HASHTABLE (qdisc_hash, 4);
2053 /* These may be needed for future network-power-down code. */
2054 struct timer_list watchdog_timer;
2057 struct list_head todo_list;
2058 int __percpu *pcpu_refcnt;
2060 struct list_head link_watch_list;
2062 enum { NETREG_UNINITIALIZED=0,
2063 NETREG_REGISTERED, /* completed register_netdevice */
2064 NETREG_UNREGISTERING, /* called unregister_netdevice */
2065 NETREG_UNREGISTERED, /* completed unregister todo */
2066 NETREG_RELEASED, /* called free_netdev */
2067 NETREG_DUMMY, /* dummy device for NAPI poll */
2073 RTNL_LINK_INITIALIZED,
2074 RTNL_LINK_INITIALIZING,
2075 } rtnl_link_state:16;
2077 bool needs_free_netdev;
2078 void (*priv_destructor)(struct net_device *dev);
2080 #ifdef CONFIG_NETPOLL
2081 struct netpoll_info __rcu *npinfo;
2084 possible_net_t nd_net;
2086 /* mid-layer private */
2089 struct pcpu_lstats __percpu *lstats;
2090 struct pcpu_sw_netstats __percpu *tstats;
2091 struct pcpu_dstats __percpu *dstats;
2094 #if IS_ENABLED(CONFIG_GARP)
2095 struct garp_port __rcu *garp_port;
2097 #if IS_ENABLED(CONFIG_MRP)
2098 struct mrp_port __rcu *mrp_port;
2102 const struct attribute_group *sysfs_groups[4];
2103 const struct attribute_group *sysfs_rx_queue_group;
2105 const struct rtnl_link_ops *rtnl_link_ops;
2107 /* for setting kernel sock attribute on TCP connection setup */
2108 #define GSO_MAX_SIZE 65536
2109 unsigned int gso_max_size;
2110 #define GSO_MAX_SEGS 65535
2114 const struct dcbnl_rtnl_ops *dcbnl_ops;
2117 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2118 u8 prio_tc_map[TC_BITMASK + 1];
2120 #if IS_ENABLED(CONFIG_FCOE)
2121 unsigned int fcoe_ddp_xid;
2123 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2124 struct netprio_map __rcu *priomap;
2126 struct phy_device *phydev;
2127 struct sfp_bus *sfp_bus;
2128 struct lock_class_key addr_list_lock_key;
2129 struct lock_class_key *qdisc_tx_busylock;
2130 struct lock_class_key *qdisc_running_key;
2132 unsigned wol_enabled:1;
2134 struct list_head net_notifier_list;
2136 #if IS_ENABLED(CONFIG_MACSEC)
2137 /* MACsec management functions */
2138 const struct macsec_ops *macsec_ops;
2141 #define to_net_dev(d) container_of(d, struct net_device, dev)
2143 static inline bool netif_elide_gro(const struct net_device *dev)
2145 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2150 #define NETDEV_ALIGN 32
2153 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2155 return dev->prio_tc_map[prio & TC_BITMASK];
2159 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2161 if (tc >= dev->num_tc)
2164 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2168 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2169 void netdev_reset_tc(struct net_device *dev);
2170 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2171 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2174 int netdev_get_num_tc(struct net_device *dev)
2179 void netdev_unbind_sb_channel(struct net_device *dev,
2180 struct net_device *sb_dev);
2181 int netdev_bind_sb_channel_queue(struct net_device *dev,
2182 struct net_device *sb_dev,
2183 u8 tc, u16 count, u16 offset);
2184 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2185 static inline int netdev_get_sb_channel(struct net_device *dev)
2187 return max_t(int, -dev->num_tc, 0);
2191 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2194 return &dev->_tx[index];
2197 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2198 const struct sk_buff *skb)
2200 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2203 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2204 void (*f)(struct net_device *,
2205 struct netdev_queue *,
2211 for (i = 0; i < dev->num_tx_queues; i++)
2212 f(dev, &dev->_tx[i], arg);
2215 #define netdev_lockdep_set_classes(dev) \
2217 static struct lock_class_key qdisc_tx_busylock_key; \
2218 static struct lock_class_key qdisc_running_key; \
2219 static struct lock_class_key qdisc_xmit_lock_key; \
2222 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2223 (dev)->qdisc_running_key = &qdisc_running_key; \
2224 for (i = 0; i < (dev)->num_tx_queues; i++) \
2225 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2226 &qdisc_xmit_lock_key); \
2229 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2230 struct net_device *sb_dev);
2231 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2232 struct sk_buff *skb,
2233 struct net_device *sb_dev);
2235 /* returns the headroom that the master device needs to take in account
2236 * when forwarding to this dev
2238 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2240 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2243 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2245 if (dev->netdev_ops->ndo_set_rx_headroom)
2246 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2249 /* set the device rx headroom to the dev's default */
2250 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2252 netdev_set_rx_headroom(dev, -1);
2256 * Net namespace inlines
2259 struct net *dev_net(const struct net_device *dev)
2261 return read_pnet(&dev->nd_net);
2265 void dev_net_set(struct net_device *dev, struct net *net)
2267 write_pnet(&dev->nd_net, net);
2271 * netdev_priv - access network device private data
2272 * @dev: network device
2274 * Get network device private data
2276 static inline void *netdev_priv(const struct net_device *dev)
2278 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2281 /* Set the sysfs physical device reference for the network logical device
2282 * if set prior to registration will cause a symlink during initialization.
2284 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2286 /* Set the sysfs device type for the network logical device to allow
2287 * fine-grained identification of different network device types. For
2288 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2290 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2292 /* Default NAPI poll() weight
2293 * Device drivers are strongly advised to not use bigger value
2295 #define NAPI_POLL_WEIGHT 64
2298 * netif_napi_add - initialize a NAPI context
2299 * @dev: network device
2300 * @napi: NAPI context
2301 * @poll: polling function
2302 * @weight: default weight
2304 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2305 * *any* of the other NAPI-related functions.
2307 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2308 int (*poll)(struct napi_struct *, int), int weight);
2311 * netif_tx_napi_add - initialize a NAPI context
2312 * @dev: network device
2313 * @napi: NAPI context
2314 * @poll: polling function
2315 * @weight: default weight
2317 * This variant of netif_napi_add() should be used from drivers using NAPI
2318 * to exclusively poll a TX queue.
2319 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2321 static inline void netif_tx_napi_add(struct net_device *dev,
2322 struct napi_struct *napi,
2323 int (*poll)(struct napi_struct *, int),
2326 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2327 netif_napi_add(dev, napi, poll, weight);
2331 * netif_napi_del - remove a NAPI context
2332 * @napi: NAPI context
2334 * netif_napi_del() removes a NAPI context from the network device NAPI list
2336 void netif_napi_del(struct napi_struct *napi);
2338 struct napi_gro_cb {
2339 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2342 /* Length of frag0. */
2343 unsigned int frag0_len;
2345 /* This indicates where we are processing relative to skb->data. */
2348 /* This is non-zero if the packet cannot be merged with the new skb. */
2351 /* Save the IP ID here and check when we get to the transport layer */
2354 /* Number of segments aggregated. */
2357 /* Start offset for remote checksum offload */
2358 u16 gro_remcsum_start;
2360 /* jiffies when first packet was created/queued */
2363 /* Used in ipv6_gro_receive() and foo-over-udp */
2366 /* This is non-zero if the packet may be of the same flow. */
2369 /* Used in tunnel GRO receive */
2372 /* GRO checksum is valid */
2375 /* Number of checksums via CHECKSUM_UNNECESSARY */
2380 #define NAPI_GRO_FREE 1
2381 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2383 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2386 /* Used in GRE, set in fou/gue_gro_receive */
2389 /* Used to determine if flush_id can be ignored */
2392 /* Number of gro_receive callbacks this packet already went through */
2393 u8 recursion_counter:4;
2395 /* GRO is done by frag_list pointer chaining. */
2398 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2401 /* used in skb_gro_receive() slow path */
2402 struct sk_buff *last;
2405 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2407 #define GRO_RECURSION_LIMIT 15
2408 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2410 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2413 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2414 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2415 struct list_head *head,
2416 struct sk_buff *skb)
2418 if (unlikely(gro_recursion_inc_test(skb))) {
2419 NAPI_GRO_CB(skb)->flush |= 1;
2423 return cb(head, skb);
2426 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2428 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2430 struct list_head *head,
2431 struct sk_buff *skb)
2433 if (unlikely(gro_recursion_inc_test(skb))) {
2434 NAPI_GRO_CB(skb)->flush |= 1;
2438 return cb(sk, head, skb);
2441 struct packet_type {
2442 __be16 type; /* This is really htons(ether_type). */
2443 bool ignore_outgoing;
2444 struct net_device *dev; /* NULL is wildcarded here */
2445 int (*func) (struct sk_buff *,
2446 struct net_device *,
2447 struct packet_type *,
2448 struct net_device *);
2449 void (*list_func) (struct list_head *,
2450 struct packet_type *,
2451 struct net_device *);
2452 bool (*id_match)(struct packet_type *ptype,
2454 void *af_packet_priv;
2455 struct list_head list;
2458 struct offload_callbacks {
2459 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2460 netdev_features_t features);
2461 struct sk_buff *(*gro_receive)(struct list_head *head,
2462 struct sk_buff *skb);
2463 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2466 struct packet_offload {
2467 __be16 type; /* This is really htons(ether_type). */
2469 struct offload_callbacks callbacks;
2470 struct list_head list;
2473 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2474 struct pcpu_sw_netstats {
2479 struct u64_stats_sync syncp;
2480 } __aligned(4 * sizeof(u64));
2482 struct pcpu_lstats {
2483 u64_stats_t packets;
2485 struct u64_stats_sync syncp;
2486 } __aligned(2 * sizeof(u64));
2488 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2490 static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2492 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2494 u64_stats_update_begin(&lstats->syncp);
2495 u64_stats_add(&lstats->bytes, len);
2496 u64_stats_inc(&lstats->packets);
2497 u64_stats_update_end(&lstats->syncp);
2500 #define __netdev_alloc_pcpu_stats(type, gfp) \
2502 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2505 for_each_possible_cpu(__cpu) { \
2506 typeof(type) *stat; \
2507 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2508 u64_stats_init(&stat->syncp); \
2514 #define netdev_alloc_pcpu_stats(type) \
2515 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2517 enum netdev_lag_tx_type {
2518 NETDEV_LAG_TX_TYPE_UNKNOWN,
2519 NETDEV_LAG_TX_TYPE_RANDOM,
2520 NETDEV_LAG_TX_TYPE_BROADCAST,
2521 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2522 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2523 NETDEV_LAG_TX_TYPE_HASH,
2526 enum netdev_lag_hash {
2527 NETDEV_LAG_HASH_NONE,
2529 NETDEV_LAG_HASH_L34,
2530 NETDEV_LAG_HASH_L23,
2531 NETDEV_LAG_HASH_E23,
2532 NETDEV_LAG_HASH_E34,
2533 NETDEV_LAG_HASH_UNKNOWN,
2536 struct netdev_lag_upper_info {
2537 enum netdev_lag_tx_type tx_type;
2538 enum netdev_lag_hash hash_type;
2541 struct netdev_lag_lower_state_info {
2546 #include <linux/notifier.h>
2548 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2549 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2553 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2555 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2556 detected a hardware crash and restarted
2557 - we can use this eg to kick tcp sessions
2559 NETDEV_CHANGE, /* Notify device state change */
2562 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2563 NETDEV_CHANGEADDR, /* notify after the address change */
2564 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2568 NETDEV_BONDING_FAILOVER,
2570 NETDEV_PRE_TYPE_CHANGE,
2571 NETDEV_POST_TYPE_CHANGE,
2574 NETDEV_NOTIFY_PEERS,
2578 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2579 NETDEV_CHANGEINFODATA,
2580 NETDEV_BONDING_INFO,
2581 NETDEV_PRECHANGEUPPER,
2582 NETDEV_CHANGELOWERSTATE,
2583 NETDEV_UDP_TUNNEL_PUSH_INFO,
2584 NETDEV_UDP_TUNNEL_DROP_INFO,
2585 NETDEV_CHANGE_TX_QUEUE_LEN,
2586 NETDEV_CVLAN_FILTER_PUSH_INFO,
2587 NETDEV_CVLAN_FILTER_DROP_INFO,
2588 NETDEV_SVLAN_FILTER_PUSH_INFO,
2589 NETDEV_SVLAN_FILTER_DROP_INFO,
2591 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2593 int register_netdevice_notifier(struct notifier_block *nb);
2594 int unregister_netdevice_notifier(struct notifier_block *nb);
2595 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2596 int unregister_netdevice_notifier_net(struct net *net,
2597 struct notifier_block *nb);
2598 int register_netdevice_notifier_dev_net(struct net_device *dev,
2599 struct notifier_block *nb,
2600 struct netdev_net_notifier *nn);
2601 int unregister_netdevice_notifier_dev_net(struct net_device *dev,
2602 struct notifier_block *nb,
2603 struct netdev_net_notifier *nn);
2605 struct netdev_notifier_info {
2606 struct net_device *dev;
2607 struct netlink_ext_ack *extack;
2610 struct netdev_notifier_info_ext {
2611 struct netdev_notifier_info info; /* must be first */
2617 struct netdev_notifier_change_info {
2618 struct netdev_notifier_info info; /* must be first */
2619 unsigned int flags_changed;
2622 struct netdev_notifier_changeupper_info {
2623 struct netdev_notifier_info info; /* must be first */
2624 struct net_device *upper_dev; /* new upper dev */
2625 bool master; /* is upper dev master */
2626 bool linking; /* is the notification for link or unlink */
2627 void *upper_info; /* upper dev info */
2630 struct netdev_notifier_changelowerstate_info {
2631 struct netdev_notifier_info info; /* must be first */
2632 void *lower_state_info; /* is lower dev state */
2635 struct netdev_notifier_pre_changeaddr_info {
2636 struct netdev_notifier_info info; /* must be first */
2637 const unsigned char *dev_addr;
2640 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2641 struct net_device *dev)
2644 info->extack = NULL;
2647 static inline struct net_device *
2648 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2653 static inline struct netlink_ext_ack *
2654 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2656 return info->extack;
2659 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2662 extern rwlock_t dev_base_lock; /* Device list lock */
2664 #define for_each_netdev(net, d) \
2665 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2666 #define for_each_netdev_reverse(net, d) \
2667 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2668 #define for_each_netdev_rcu(net, d) \
2669 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2670 #define for_each_netdev_safe(net, d, n) \
2671 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2672 #define for_each_netdev_continue(net, d) \
2673 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2674 #define for_each_netdev_continue_reverse(net, d) \
2675 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2677 #define for_each_netdev_continue_rcu(net, d) \
2678 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2679 #define for_each_netdev_in_bond_rcu(bond, slave) \
2680 for_each_netdev_rcu(&init_net, slave) \
2681 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2682 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2684 static inline struct net_device *next_net_device(struct net_device *dev)
2686 struct list_head *lh;
2690 lh = dev->dev_list.next;
2691 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2694 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2696 struct list_head *lh;
2700 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2701 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2704 static inline struct net_device *first_net_device(struct net *net)
2706 return list_empty(&net->dev_base_head) ? NULL :
2707 net_device_entry(net->dev_base_head.next);
2710 static inline struct net_device *first_net_device_rcu(struct net *net)
2712 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2714 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2717 int netdev_boot_setup_check(struct net_device *dev);
2718 unsigned long netdev_boot_base(const char *prefix, int unit);
2719 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2720 const char *hwaddr);
2721 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2722 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2723 void dev_add_pack(struct packet_type *pt);
2724 void dev_remove_pack(struct packet_type *pt);
2725 void __dev_remove_pack(struct packet_type *pt);
2726 void dev_add_offload(struct packet_offload *po);
2727 void dev_remove_offload(struct packet_offload *po);
2729 int dev_get_iflink(const struct net_device *dev);
2730 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2731 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2732 unsigned short mask);
2733 struct net_device *dev_get_by_name(struct net *net, const char *name);
2734 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2735 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2736 int dev_alloc_name(struct net_device *dev, const char *name);
2737 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2738 void dev_close(struct net_device *dev);
2739 void dev_close_many(struct list_head *head, bool unlink);
2740 void dev_disable_lro(struct net_device *dev);
2741 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2742 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2743 struct net_device *sb_dev);
2744 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2745 struct net_device *sb_dev);
2746 int dev_queue_xmit(struct sk_buff *skb);
2747 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2748 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2749 int register_netdevice(struct net_device *dev);
2750 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2751 void unregister_netdevice_many(struct list_head *head);
2752 static inline void unregister_netdevice(struct net_device *dev)
2754 unregister_netdevice_queue(dev, NULL);
2757 int netdev_refcnt_read(const struct net_device *dev);
2758 void free_netdev(struct net_device *dev);
2759 void netdev_freemem(struct net_device *dev);
2760 void synchronize_net(void);
2761 int init_dummy_netdev(struct net_device *dev);
2763 struct net_device *netdev_get_xmit_slave(struct net_device *dev,
2764 struct sk_buff *skb,
2766 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2767 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2768 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2769 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2770 int netdev_get_name(struct net *net, char *name, int ifindex);
2771 int dev_restart(struct net_device *dev);
2772 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2773 int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
2775 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2777 return NAPI_GRO_CB(skb)->data_offset;
2780 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2782 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2785 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2787 NAPI_GRO_CB(skb)->data_offset += len;
2790 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2791 unsigned int offset)
2793 return NAPI_GRO_CB(skb)->frag0 + offset;
2796 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2798 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2801 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2803 NAPI_GRO_CB(skb)->frag0 = NULL;
2804 NAPI_GRO_CB(skb)->frag0_len = 0;
2807 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2808 unsigned int offset)
2810 if (!pskb_may_pull(skb, hlen))
2813 skb_gro_frag0_invalidate(skb);
2814 return skb->data + offset;
2817 static inline void *skb_gro_network_header(struct sk_buff *skb)
2819 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2820 skb_network_offset(skb);
2823 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2824 const void *start, unsigned int len)
2826 if (NAPI_GRO_CB(skb)->csum_valid)
2827 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2828 csum_partial(start, len, 0));
2831 /* GRO checksum functions. These are logical equivalents of the normal
2832 * checksum functions (in skbuff.h) except that they operate on the GRO
2833 * offsets and fields in sk_buff.
2836 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2838 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2840 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2843 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2847 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2848 skb_checksum_start_offset(skb) <
2849 skb_gro_offset(skb)) &&
2850 !skb_at_gro_remcsum_start(skb) &&
2851 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2852 (!zero_okay || check));
2855 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2858 if (NAPI_GRO_CB(skb)->csum_valid &&
2859 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2862 NAPI_GRO_CB(skb)->csum = psum;
2864 return __skb_gro_checksum_complete(skb);
2867 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2869 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2870 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2871 NAPI_GRO_CB(skb)->csum_cnt--;
2873 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2874 * verified a new top level checksum or an encapsulated one
2875 * during GRO. This saves work if we fallback to normal path.
2877 __skb_incr_checksum_unnecessary(skb);
2881 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2884 __sum16 __ret = 0; \
2885 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2886 __ret = __skb_gro_checksum_validate_complete(skb, \
2887 compute_pseudo(skb, proto)); \
2889 skb_gro_incr_csum_unnecessary(skb); \
2893 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2894 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2896 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2898 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2900 #define skb_gro_checksum_simple_validate(skb) \
2901 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2903 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2905 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2906 !NAPI_GRO_CB(skb)->csum_valid);
2909 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2912 NAPI_GRO_CB(skb)->csum = ~pseudo;
2913 NAPI_GRO_CB(skb)->csum_valid = 1;
2916 #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \
2918 if (__skb_gro_checksum_convert_check(skb)) \
2919 __skb_gro_checksum_convert(skb, \
2920 compute_pseudo(skb, proto)); \
2923 struct gro_remcsum {
2928 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2934 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2935 unsigned int off, size_t hdrlen,
2936 int start, int offset,
2937 struct gro_remcsum *grc,
2941 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2943 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2946 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2950 ptr = skb_gro_header_fast(skb, off);
2951 if (skb_gro_header_hard(skb, off + plen)) {
2952 ptr = skb_gro_header_slow(skb, off + plen, off);
2957 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2960 /* Adjust skb->csum since we changed the packet */
2961 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2963 grc->offset = off + hdrlen + offset;
2969 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2970 struct gro_remcsum *grc)
2973 size_t plen = grc->offset + sizeof(u16);
2978 ptr = skb_gro_header_fast(skb, grc->offset);
2979 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2980 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2985 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2988 #ifdef CONFIG_XFRM_OFFLOAD
2989 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2991 if (PTR_ERR(pp) != -EINPROGRESS)
2992 NAPI_GRO_CB(skb)->flush |= flush;
2994 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2997 struct gro_remcsum *grc)
2999 if (PTR_ERR(pp) != -EINPROGRESS) {
3000 NAPI_GRO_CB(skb)->flush |= flush;
3001 skb_gro_remcsum_cleanup(skb, grc);
3002 skb->remcsum_offload = 0;
3006 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
3008 NAPI_GRO_CB(skb)->flush |= flush;
3010 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
3013 struct gro_remcsum *grc)
3015 NAPI_GRO_CB(skb)->flush |= flush;
3016 skb_gro_remcsum_cleanup(skb, grc);
3017 skb->remcsum_offload = 0;
3021 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
3022 unsigned short type,
3023 const void *daddr, const void *saddr,
3026 if (!dev->header_ops || !dev->header_ops->create)
3029 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
3032 static inline int dev_parse_header(const struct sk_buff *skb,
3033 unsigned char *haddr)
3035 const struct net_device *dev = skb->dev;
3037 if (!dev->header_ops || !dev->header_ops->parse)
3039 return dev->header_ops->parse(skb, haddr);
3042 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
3044 const struct net_device *dev = skb->dev;
3046 if (!dev->header_ops || !dev->header_ops->parse_protocol)
3048 return dev->header_ops->parse_protocol(skb);
3051 /* ll_header must have at least hard_header_len allocated */
3052 static inline bool dev_validate_header(const struct net_device *dev,
3053 char *ll_header, int len)
3055 if (likely(len >= dev->hard_header_len))
3057 if (len < dev->min_header_len)
3060 if (capable(CAP_SYS_RAWIO)) {
3061 memset(ll_header + len, 0, dev->hard_header_len - len);
3065 if (dev->header_ops && dev->header_ops->validate)
3066 return dev->header_ops->validate(ll_header, len);
3071 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
3073 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
3074 static inline int unregister_gifconf(unsigned int family)
3076 return register_gifconf(family, NULL);
3079 #ifdef CONFIG_NET_FLOW_LIMIT
3080 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
3081 struct sd_flow_limit {
3083 unsigned int num_buckets;
3084 unsigned int history_head;
3085 u16 history[FLOW_LIMIT_HISTORY];
3089 extern int netdev_flow_limit_table_len;
3090 #endif /* CONFIG_NET_FLOW_LIMIT */
3093 * Incoming packets are placed on per-CPU queues
3095 struct softnet_data {
3096 struct list_head poll_list;
3097 struct sk_buff_head process_queue;
3100 unsigned int processed;
3101 unsigned int time_squeeze;
3102 unsigned int received_rps;
3104 struct softnet_data *rps_ipi_list;
3106 #ifdef CONFIG_NET_FLOW_LIMIT
3107 struct sd_flow_limit __rcu *flow_limit;
3109 struct Qdisc *output_queue;
3110 struct Qdisc **output_queue_tailp;
3111 struct sk_buff *completion_queue;
3112 #ifdef CONFIG_XFRM_OFFLOAD
3113 struct sk_buff_head xfrm_backlog;
3115 /* written and read only by owning cpu: */
3121 /* input_queue_head should be written by cpu owning this struct,
3122 * and only read by other cpus. Worth using a cache line.
3124 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3126 /* Elements below can be accessed between CPUs for RPS/RFS */
3127 call_single_data_t csd ____cacheline_aligned_in_smp;
3128 struct softnet_data *rps_ipi_next;
3130 unsigned int input_queue_tail;
3132 unsigned int dropped;
3133 struct sk_buff_head input_pkt_queue;
3134 struct napi_struct backlog;
3138 static inline void input_queue_head_incr(struct softnet_data *sd)
3141 sd->input_queue_head++;
3145 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3146 unsigned int *qtail)
3149 *qtail = ++sd->input_queue_tail;
3153 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3155 static inline int dev_recursion_level(void)
3157 return this_cpu_read(softnet_data.xmit.recursion);
3160 #define XMIT_RECURSION_LIMIT 10
3161 static inline bool dev_xmit_recursion(void)
3163 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3164 XMIT_RECURSION_LIMIT);
3167 static inline void dev_xmit_recursion_inc(void)
3169 __this_cpu_inc(softnet_data.xmit.recursion);
3172 static inline void dev_xmit_recursion_dec(void)
3174 __this_cpu_dec(softnet_data.xmit.recursion);
3177 void __netif_schedule(struct Qdisc *q);
3178 void netif_schedule_queue(struct netdev_queue *txq);
3180 static inline void netif_tx_schedule_all(struct net_device *dev)
3184 for (i = 0; i < dev->num_tx_queues; i++)
3185 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3188 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3190 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3194 * netif_start_queue - allow transmit
3195 * @dev: network device
3197 * Allow upper layers to call the device hard_start_xmit routine.
3199 static inline void netif_start_queue(struct net_device *dev)
3201 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3204 static inline void netif_tx_start_all_queues(struct net_device *dev)
3208 for (i = 0; i < dev->num_tx_queues; i++) {
3209 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3210 netif_tx_start_queue(txq);
3214 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3217 * netif_wake_queue - restart transmit
3218 * @dev: network device
3220 * Allow upper layers to call the device hard_start_xmit routine.
3221 * Used for flow control when transmit resources are available.
3223 static inline void netif_wake_queue(struct net_device *dev)
3225 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3228 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3232 for (i = 0; i < dev->num_tx_queues; i++) {
3233 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3234 netif_tx_wake_queue(txq);
3238 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3240 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3244 * netif_stop_queue - stop transmitted packets
3245 * @dev: network device
3247 * Stop upper layers calling the device hard_start_xmit routine.
3248 * Used for flow control when transmit resources are unavailable.
3250 static inline void netif_stop_queue(struct net_device *dev)
3252 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3255 void netif_tx_stop_all_queues(struct net_device *dev);
3256 void netdev_update_lockdep_key(struct net_device *dev);
3258 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3260 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3264 * netif_queue_stopped - test if transmit queue is flowblocked
3265 * @dev: network device
3267 * Test if transmit queue on device is currently unable to send.
3269 static inline bool netif_queue_stopped(const struct net_device *dev)
3271 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3274 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3276 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3280 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3282 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3286 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3288 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3292 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3293 * @dev_queue: pointer to transmit queue
3295 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3296 * to give appropriate hint to the CPU.
3298 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3301 prefetchw(&dev_queue->dql.num_queued);
3306 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3307 * @dev_queue: pointer to transmit queue
3309 * BQL enabled drivers might use this helper in their TX completion path,
3310 * to give appropriate hint to the CPU.
3312 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3315 prefetchw(&dev_queue->dql.limit);
3319 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3323 dql_queued(&dev_queue->dql, bytes);
3325 if (likely(dql_avail(&dev_queue->dql) >= 0))
3328 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3331 * The XOFF flag must be set before checking the dql_avail below,
3332 * because in netdev_tx_completed_queue we update the dql_completed
3333 * before checking the XOFF flag.
3337 /* check again in case another CPU has just made room avail */
3338 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3339 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3343 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3344 * that they should not test BQL status themselves.
3345 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3347 * Returns true if the doorbell must be used to kick the NIC.
3349 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3355 dql_queued(&dev_queue->dql, bytes);
3357 return netif_tx_queue_stopped(dev_queue);
3359 netdev_tx_sent_queue(dev_queue, bytes);
3364 * netdev_sent_queue - report the number of bytes queued to hardware
3365 * @dev: network device
3366 * @bytes: number of bytes queued to the hardware device queue
3368 * Report the number of bytes queued for sending/completion to the network
3369 * device hardware queue. @bytes should be a good approximation and should
3370 * exactly match netdev_completed_queue() @bytes
3372 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3374 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3377 static inline bool __netdev_sent_queue(struct net_device *dev,
3381 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3385 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3386 unsigned int pkts, unsigned int bytes)
3389 if (unlikely(!bytes))
3392 dql_completed(&dev_queue->dql, bytes);
3395 * Without the memory barrier there is a small possiblity that
3396 * netdev_tx_sent_queue will miss the update and cause the queue to
3397 * be stopped forever
3401 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3404 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3405 netif_schedule_queue(dev_queue);
3410 * netdev_completed_queue - report bytes and packets completed by device
3411 * @dev: network device
3412 * @pkts: actual number of packets sent over the medium
3413 * @bytes: actual number of bytes sent over the medium
3415 * Report the number of bytes and packets transmitted by the network device
3416 * hardware queue over the physical medium, @bytes must exactly match the
3417 * @bytes amount passed to netdev_sent_queue()
3419 static inline void netdev_completed_queue(struct net_device *dev,
3420 unsigned int pkts, unsigned int bytes)
3422 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3425 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3428 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3434 * netdev_reset_queue - reset the packets and bytes count of a network device
3435 * @dev_queue: network device
3437 * Reset the bytes and packet count of a network device and clear the
3438 * software flow control OFF bit for this network device
3440 static inline void netdev_reset_queue(struct net_device *dev_queue)
3442 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3446 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3447 * @dev: network device
3448 * @queue_index: given tx queue index
3450 * Returns 0 if given tx queue index >= number of device tx queues,
3451 * otherwise returns the originally passed tx queue index.
3453 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3455 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3456 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3457 dev->name, queue_index,
3458 dev->real_num_tx_queues);
3466 * netif_running - test if up
3467 * @dev: network device
3469 * Test if the device has been brought up.
3471 static inline bool netif_running(const struct net_device *dev)
3473 return test_bit(__LINK_STATE_START, &dev->state);
3477 * Routines to manage the subqueues on a device. We only need start,
3478 * stop, and a check if it's stopped. All other device management is
3479 * done at the overall netdevice level.
3480 * Also test the device if we're multiqueue.
3484 * netif_start_subqueue - allow sending packets on subqueue
3485 * @dev: network device
3486 * @queue_index: sub queue index
3488 * Start individual transmit queue of a device with multiple transmit queues.
3490 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3492 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3494 netif_tx_start_queue(txq);
3498 * netif_stop_subqueue - stop sending packets on subqueue
3499 * @dev: network device
3500 * @queue_index: sub queue index
3502 * Stop individual transmit queue of a device with multiple transmit queues.
3504 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3506 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3507 netif_tx_stop_queue(txq);
3511 * netif_subqueue_stopped - test status of subqueue
3512 * @dev: network device
3513 * @queue_index: sub queue index
3515 * Check individual transmit queue of a device with multiple transmit queues.
3517 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3520 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3522 return netif_tx_queue_stopped(txq);
3525 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3526 struct sk_buff *skb)
3528 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3532 * netif_wake_subqueue - allow sending packets on subqueue
3533 * @dev: network device
3534 * @queue_index: sub queue index
3536 * Resume individual transmit queue of a device with multiple transmit queues.
3538 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3540 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3542 netif_tx_wake_queue(txq);
3546 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3548 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3549 u16 index, bool is_rxqs_map);
3552 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3553 * @j: CPU/Rx queue index
3554 * @mask: bitmask of all cpus/rx queues
3555 * @nr_bits: number of bits in the bitmask
3557 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3559 static inline bool netif_attr_test_mask(unsigned long j,
3560 const unsigned long *mask,
3561 unsigned int nr_bits)
3563 cpu_max_bits_warn(j, nr_bits);
3564 return test_bit(j, mask);
3568 * netif_attr_test_online - Test for online CPU/Rx queue
3569 * @j: CPU/Rx queue index
3570 * @online_mask: bitmask for CPUs/Rx queues that are online
3571 * @nr_bits: number of bits in the bitmask
3573 * Returns true if a CPU/Rx queue is online.
3575 static inline bool netif_attr_test_online(unsigned long j,
3576 const unsigned long *online_mask,
3577 unsigned int nr_bits)
3579 cpu_max_bits_warn(j, nr_bits);
3582 return test_bit(j, online_mask);
3584 return (j < nr_bits);
3588 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3589 * @n: CPU/Rx queue index
3590 * @srcp: the cpumask/Rx queue mask pointer
3591 * @nr_bits: number of bits in the bitmask
3593 * Returns >= nr_bits if no further CPUs/Rx queues set.
3595 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3596 unsigned int nr_bits)
3598 /* -1 is a legal arg here. */
3600 cpu_max_bits_warn(n, nr_bits);
3603 return find_next_bit(srcp, nr_bits, n + 1);
3609 * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p
3610 * @n: CPU/Rx queue index
3611 * @src1p: the first CPUs/Rx queues mask pointer
3612 * @src2p: the second CPUs/Rx queues mask pointer
3613 * @nr_bits: number of bits in the bitmask
3615 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3617 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3618 const unsigned long *src2p,
3619 unsigned int nr_bits)
3621 /* -1 is a legal arg here. */
3623 cpu_max_bits_warn(n, nr_bits);
3626 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3628 return find_next_bit(src1p, nr_bits, n + 1);
3630 return find_next_bit(src2p, nr_bits, n + 1);
3635 static inline int netif_set_xps_queue(struct net_device *dev,
3636 const struct cpumask *mask,
3642 static inline int __netif_set_xps_queue(struct net_device *dev,
3643 const unsigned long *mask,
3644 u16 index, bool is_rxqs_map)
3651 * netif_is_multiqueue - test if device has multiple transmit queues
3652 * @dev: network device
3654 * Check if device has multiple transmit queues
3656 static inline bool netif_is_multiqueue(const struct net_device *dev)
3658 return dev->num_tx_queues > 1;
3661 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3664 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3666 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3669 dev->real_num_rx_queues = rxqs;
3674 static inline struct netdev_rx_queue *
3675 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3677 return dev->_rx + rxq;
3681 static inline unsigned int get_netdev_rx_queue_index(
3682 struct netdev_rx_queue *queue)
3684 struct net_device *dev = queue->dev;
3685 int index = queue - dev->_rx;
3687 BUG_ON(index >= dev->num_rx_queues);
3692 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3693 int netif_get_num_default_rss_queues(void);
3695 enum skb_free_reason {
3696 SKB_REASON_CONSUMED,
3700 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3701 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3704 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3705 * interrupt context or with hardware interrupts being disabled.
3706 * (in_irq() || irqs_disabled())
3708 * We provide four helpers that can be used in following contexts :
3710 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3711 * replacing kfree_skb(skb)
3713 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3714 * Typically used in place of consume_skb(skb) in TX completion path
3716 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3717 * replacing kfree_skb(skb)
3719 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3720 * and consumed a packet. Used in place of consume_skb(skb)
3722 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3724 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3727 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3729 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3732 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3734 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3737 static inline void dev_consume_skb_any(struct sk_buff *skb)
3739 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3742 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3743 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3744 int netif_rx(struct sk_buff *skb);
3745 int netif_rx_ni(struct sk_buff *skb);
3746 int netif_receive_skb(struct sk_buff *skb);
3747 int netif_receive_skb_core(struct sk_buff *skb);
3748 void netif_receive_skb_list(struct list_head *head);
3749 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3750 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3751 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3752 gro_result_t napi_gro_frags(struct napi_struct *napi);
3753 struct packet_offload *gro_find_receive_by_type(__be16 type);
3754 struct packet_offload *gro_find_complete_by_type(__be16 type);
3756 static inline void napi_free_frags(struct napi_struct *napi)
3758 kfree_skb(napi->skb);
3762 bool netdev_is_rx_handler_busy(struct net_device *dev);
3763 int netdev_rx_handler_register(struct net_device *dev,
3764 rx_handler_func_t *rx_handler,
3765 void *rx_handler_data);
3766 void netdev_rx_handler_unregister(struct net_device *dev);
3768 bool dev_valid_name(const char *name);
3769 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3770 bool *need_copyout);
3771 int dev_ifconf(struct net *net, struct ifconf *, int);
3772 int dev_ethtool(struct net *net, struct ifreq *);
3773 unsigned int dev_get_flags(const struct net_device *);
3774 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3775 struct netlink_ext_ack *extack);
3776 int dev_change_flags(struct net_device *dev, unsigned int flags,
3777 struct netlink_ext_ack *extack);
3778 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3779 unsigned int gchanges);
3780 int dev_change_name(struct net_device *, const char *);
3781 int dev_set_alias(struct net_device *, const char *, size_t);
3782 int dev_get_alias(const struct net_device *, char *, size_t);
3783 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3784 int __dev_set_mtu(struct net_device *, int);
3785 int dev_validate_mtu(struct net_device *dev, int mtu,
3786 struct netlink_ext_ack *extack);
3787 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3788 struct netlink_ext_ack *extack);
3789 int dev_set_mtu(struct net_device *, int);
3790 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3791 void dev_set_group(struct net_device *, int);
3792 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3793 struct netlink_ext_ack *extack);
3794 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3795 struct netlink_ext_ack *extack);
3796 int dev_change_carrier(struct net_device *, bool new_carrier);
3797 int dev_get_phys_port_id(struct net_device *dev,
3798 struct netdev_phys_item_id *ppid);
3799 int dev_get_phys_port_name(struct net_device *dev,
3800 char *name, size_t len);
3801 int dev_get_port_parent_id(struct net_device *dev,
3802 struct netdev_phys_item_id *ppid, bool recurse);
3803 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3804 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3805 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3806 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3807 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3808 struct netdev_queue *txq, int *ret);
3810 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3811 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3812 int fd, int expected_fd, u32 flags);
3813 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3814 enum bpf_netdev_command cmd);
3815 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3817 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3818 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3819 bool is_skb_forwardable(const struct net_device *dev,
3820 const struct sk_buff *skb);
3822 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3823 struct sk_buff *skb)
3825 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3826 unlikely(!is_skb_forwardable(dev, skb))) {
3827 atomic_long_inc(&dev->rx_dropped);
3832 skb_scrub_packet(skb, true);
3837 bool dev_nit_active(struct net_device *dev);
3838 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3840 extern int netdev_budget;
3841 extern unsigned int netdev_budget_usecs;
3843 /* Called by rtnetlink.c:rtnl_unlock() */
3844 void netdev_run_todo(void);
3847 * dev_put - release reference to device
3848 * @dev: network device
3850 * Release reference to device to allow it to be freed.
3852 static inline void dev_put(struct net_device *dev)
3854 this_cpu_dec(*dev->pcpu_refcnt);
3858 * dev_hold - get reference to device
3859 * @dev: network device
3861 * Hold reference to device to keep it from being freed.
3863 static inline void dev_hold(struct net_device *dev)
3865 this_cpu_inc(*dev->pcpu_refcnt);
3868 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3869 * and _off may be called from IRQ context, but it is caller
3870 * who is responsible for serialization of these calls.
3872 * The name carrier is inappropriate, these functions should really be
3873 * called netif_lowerlayer_*() because they represent the state of any
3874 * kind of lower layer not just hardware media.
3877 void linkwatch_init_dev(struct net_device *dev);
3878 void linkwatch_fire_event(struct net_device *dev);
3879 void linkwatch_forget_dev(struct net_device *dev);
3882 * netif_carrier_ok - test if carrier present
3883 * @dev: network device
3885 * Check if carrier is present on device
3887 static inline bool netif_carrier_ok(const struct net_device *dev)
3889 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3892 unsigned long dev_trans_start(struct net_device *dev);
3894 void __netdev_watchdog_up(struct net_device *dev);
3896 void netif_carrier_on(struct net_device *dev);
3898 void netif_carrier_off(struct net_device *dev);
3901 * netif_dormant_on - mark device as dormant.
3902 * @dev: network device
3904 * Mark device as dormant (as per RFC2863).
3906 * The dormant state indicates that the relevant interface is not
3907 * actually in a condition to pass packets (i.e., it is not 'up') but is
3908 * in a "pending" state, waiting for some external event. For "on-
3909 * demand" interfaces, this new state identifies the situation where the
3910 * interface is waiting for events to place it in the up state.
3912 static inline void netif_dormant_on(struct net_device *dev)
3914 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3915 linkwatch_fire_event(dev);
3919 * netif_dormant_off - set device as not dormant.
3920 * @dev: network device
3922 * Device is not in dormant state.
3924 static inline void netif_dormant_off(struct net_device *dev)
3926 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3927 linkwatch_fire_event(dev);
3931 * netif_dormant - test if device is dormant
3932 * @dev: network device
3934 * Check if device is dormant.
3936 static inline bool netif_dormant(const struct net_device *dev)
3938 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3943 * netif_testing_on - mark device as under test.
3944 * @dev: network device
3946 * Mark device as under test (as per RFC2863).
3948 * The testing state indicates that some test(s) must be performed on
3949 * the interface. After completion, of the test, the interface state
3950 * will change to up, dormant, or down, as appropriate.
3952 static inline void netif_testing_on(struct net_device *dev)
3954 if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state))
3955 linkwatch_fire_event(dev);
3959 * netif_testing_off - set device as not under test.
3960 * @dev: network device
3962 * Device is not in testing state.
3964 static inline void netif_testing_off(struct net_device *dev)
3966 if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state))
3967 linkwatch_fire_event(dev);
3971 * netif_testing - test if device is under test
3972 * @dev: network device
3974 * Check if device is under test
3976 static inline bool netif_testing(const struct net_device *dev)
3978 return test_bit(__LINK_STATE_TESTING, &dev->state);
3983 * netif_oper_up - test if device is operational
3984 * @dev: network device
3986 * Check if carrier is operational
3988 static inline bool netif_oper_up(const struct net_device *dev)
3990 return (dev->operstate == IF_OPER_UP ||
3991 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3995 * netif_device_present - is device available or removed
3996 * @dev: network device
3998 * Check if device has not been removed from system.
4000 static inline bool netif_device_present(struct net_device *dev)
4002 return test_bit(__LINK_STATE_PRESENT, &dev->state);
4005 void netif_device_detach(struct net_device *dev);
4007 void netif_device_attach(struct net_device *dev);
4010 * Network interface message level settings
4015 NETIF_MSG_PROBE_BIT,
4017 NETIF_MSG_TIMER_BIT,
4018 NETIF_MSG_IFDOWN_BIT,
4020 NETIF_MSG_RX_ERR_BIT,
4021 NETIF_MSG_TX_ERR_BIT,
4022 NETIF_MSG_TX_QUEUED_BIT,
4024 NETIF_MSG_TX_DONE_BIT,
4025 NETIF_MSG_RX_STATUS_BIT,
4026 NETIF_MSG_PKTDATA_BIT,
4030 /* When you add a new bit above, update netif_msg_class_names array
4031 * in net/ethtool/common.c
4033 NETIF_MSG_CLASS_COUNT,
4035 /* Both ethtool_ops interface and internal driver implementation use u32 */
4036 static_assert(NETIF_MSG_CLASS_COUNT <= 32);
4038 #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))
4039 #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)
4041 #define NETIF_MSG_DRV __NETIF_MSG(DRV)
4042 #define NETIF_MSG_PROBE __NETIF_MSG(PROBE)
4043 #define NETIF_MSG_LINK __NETIF_MSG(LINK)
4044 #define NETIF_MSG_TIMER __NETIF_MSG(TIMER)
4045 #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)
4046 #define NETIF_MSG_IFUP __NETIF_MSG(IFUP)
4047 #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)
4048 #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)
4049 #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)
4050 #define NETIF_MSG_INTR __NETIF_MSG(INTR)
4051 #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)
4052 #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)
4053 #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)
4054 #define NETIF_MSG_HW __NETIF_MSG(HW)
4055 #define NETIF_MSG_WOL __NETIF_MSG(WOL)
4057 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
4058 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
4059 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
4060 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
4061 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
4062 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
4063 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
4064 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
4065 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
4066 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
4067 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
4068 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
4069 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
4070 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
4071 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
4073 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
4076 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
4077 return default_msg_enable_bits;
4078 if (debug_value == 0) /* no output */
4080 /* set low N bits */
4081 return (1U << debug_value) - 1;
4084 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
4086 spin_lock(&txq->_xmit_lock);
4087 txq->xmit_lock_owner = cpu;
4090 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
4092 __acquire(&txq->_xmit_lock);
4096 static inline void __netif_tx_release(struct netdev_queue *txq)
4098 __release(&txq->_xmit_lock);
4101 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
4103 spin_lock_bh(&txq->_xmit_lock);
4104 txq->xmit_lock_owner = smp_processor_id();
4107 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
4109 bool ok = spin_trylock(&txq->_xmit_lock);
4111 txq->xmit_lock_owner = smp_processor_id();
4115 static inline void __netif_tx_unlock(struct netdev_queue *txq)
4117 txq->xmit_lock_owner = -1;
4118 spin_unlock(&txq->_xmit_lock);
4121 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
4123 txq->xmit_lock_owner = -1;
4124 spin_unlock_bh(&txq->_xmit_lock);
4127 static inline void txq_trans_update(struct netdev_queue *txq)
4129 if (txq->xmit_lock_owner != -1)
4130 txq->trans_start = jiffies;
4133 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
4134 static inline void netif_trans_update(struct net_device *dev)
4136 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
4138 if (txq->trans_start != jiffies)
4139 txq->trans_start = jiffies;
4143 * netif_tx_lock - grab network device transmit lock
4144 * @dev: network device
4146 * Get network device transmit lock
4148 static inline void netif_tx_lock(struct net_device *dev)
4153 spin_lock(&dev->tx_global_lock);
4154 cpu = smp_processor_id();
4155 for (i = 0; i < dev->num_tx_queues; i++) {
4156 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4158 /* We are the only thread of execution doing a
4159 * freeze, but we have to grab the _xmit_lock in
4160 * order to synchronize with threads which are in
4161 * the ->hard_start_xmit() handler and already
4162 * checked the frozen bit.
4164 __netif_tx_lock(txq, cpu);
4165 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
4166 __netif_tx_unlock(txq);
4170 static inline void netif_tx_lock_bh(struct net_device *dev)
4176 static inline void netif_tx_unlock(struct net_device *dev)
4180 for (i = 0; i < dev->num_tx_queues; i++) {
4181 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4183 /* No need to grab the _xmit_lock here. If the
4184 * queue is not stopped for another reason, we
4187 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4188 netif_schedule_queue(txq);
4190 spin_unlock(&dev->tx_global_lock);
4193 static inline void netif_tx_unlock_bh(struct net_device *dev)
4195 netif_tx_unlock(dev);
4199 #define HARD_TX_LOCK(dev, txq, cpu) { \
4200 if ((dev->features & NETIF_F_LLTX) == 0) { \
4201 __netif_tx_lock(txq, cpu); \
4203 __netif_tx_acquire(txq); \
4207 #define HARD_TX_TRYLOCK(dev, txq) \
4208 (((dev->features & NETIF_F_LLTX) == 0) ? \
4209 __netif_tx_trylock(txq) : \
4210 __netif_tx_acquire(txq))
4212 #define HARD_TX_UNLOCK(dev, txq) { \
4213 if ((dev->features & NETIF_F_LLTX) == 0) { \
4214 __netif_tx_unlock(txq); \
4216 __netif_tx_release(txq); \
4220 static inline void netif_tx_disable(struct net_device *dev)
4226 cpu = smp_processor_id();
4227 for (i = 0; i < dev->num_tx_queues; i++) {
4228 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4230 __netif_tx_lock(txq, cpu);
4231 netif_tx_stop_queue(txq);
4232 __netif_tx_unlock(txq);
4237 static inline void netif_addr_lock(struct net_device *dev)
4239 spin_lock(&dev->addr_list_lock);
4242 static inline void netif_addr_lock_bh(struct net_device *dev)
4244 spin_lock_bh(&dev->addr_list_lock);
4247 static inline void netif_addr_unlock(struct net_device *dev)
4249 spin_unlock(&dev->addr_list_lock);
4252 static inline void netif_addr_unlock_bh(struct net_device *dev)
4254 spin_unlock_bh(&dev->addr_list_lock);
4258 * dev_addrs walker. Should be used only for read access. Call with
4259 * rcu_read_lock held.
4261 #define for_each_dev_addr(dev, ha) \
4262 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4264 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4266 void ether_setup(struct net_device *dev);
4268 /* Support for loadable net-drivers */
4269 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4270 unsigned char name_assign_type,
4271 void (*setup)(struct net_device *),
4272 unsigned int txqs, unsigned int rxqs);
4273 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4274 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4276 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4277 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4280 int register_netdev(struct net_device *dev);
4281 void unregister_netdev(struct net_device *dev);
4283 int devm_register_netdev(struct device *dev, struct net_device *ndev);
4285 /* General hardware address lists handling functions */
4286 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4287 struct netdev_hw_addr_list *from_list, int addr_len);
4288 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4289 struct netdev_hw_addr_list *from_list, int addr_len);
4290 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4291 struct net_device *dev,
4292 int (*sync)(struct net_device *, const unsigned char *),
4293 int (*unsync)(struct net_device *,
4294 const unsigned char *));
4295 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4296 struct net_device *dev,
4297 int (*sync)(struct net_device *,
4298 const unsigned char *, int),
4299 int (*unsync)(struct net_device *,
4300 const unsigned char *, int));
4301 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4302 struct net_device *dev,
4303 int (*unsync)(struct net_device *,
4304 const unsigned char *, int));
4305 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4306 struct net_device *dev,
4307 int (*unsync)(struct net_device *,
4308 const unsigned char *));
4309 void __hw_addr_init(struct netdev_hw_addr_list *list);
4311 /* Functions used for device addresses handling */
4312 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4313 unsigned char addr_type);
4314 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4315 unsigned char addr_type);
4316 void dev_addr_flush(struct net_device *dev);
4317 int dev_addr_init(struct net_device *dev);
4319 /* Functions used for unicast addresses handling */
4320 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4321 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4322 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4323 int dev_uc_sync(struct net_device *to, struct net_device *from);
4324 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4325 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4326 void dev_uc_flush(struct net_device *dev);
4327 void dev_uc_init(struct net_device *dev);
4330 * __dev_uc_sync - Synchonize device's unicast list
4331 * @dev: device to sync
4332 * @sync: function to call if address should be added
4333 * @unsync: function to call if address should be removed
4335 * Add newly added addresses to the interface, and release
4336 * addresses that have been deleted.
4338 static inline int __dev_uc_sync(struct net_device *dev,
4339 int (*sync)(struct net_device *,
4340 const unsigned char *),
4341 int (*unsync)(struct net_device *,
4342 const unsigned char *))
4344 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4348 * __dev_uc_unsync - Remove synchronized addresses from device
4349 * @dev: device to sync
4350 * @unsync: function to call if address should be removed
4352 * Remove all addresses that were added to the device by dev_uc_sync().
4354 static inline void __dev_uc_unsync(struct net_device *dev,
4355 int (*unsync)(struct net_device *,
4356 const unsigned char *))
4358 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4361 /* Functions used for multicast addresses handling */
4362 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4363 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4364 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4365 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4366 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4367 int dev_mc_sync(struct net_device *to, struct net_device *from);
4368 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4369 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4370 void dev_mc_flush(struct net_device *dev);
4371 void dev_mc_init(struct net_device *dev);
4374 * __dev_mc_sync - Synchonize device's multicast list
4375 * @dev: device to sync
4376 * @sync: function to call if address should be added
4377 * @unsync: function to call if address should be removed
4379 * Add newly added addresses to the interface, and release
4380 * addresses that have been deleted.
4382 static inline int __dev_mc_sync(struct net_device *dev,
4383 int (*sync)(struct net_device *,
4384 const unsigned char *),
4385 int (*unsync)(struct net_device *,
4386 const unsigned char *))
4388 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4392 * __dev_mc_unsync - Remove synchronized addresses from device
4393 * @dev: device to sync
4394 * @unsync: function to call if address should be removed
4396 * Remove all addresses that were added to the device by dev_mc_sync().
4398 static inline void __dev_mc_unsync(struct net_device *dev,
4399 int (*unsync)(struct net_device *,
4400 const unsigned char *))
4402 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4405 /* Functions used for secondary unicast and multicast support */
4406 void dev_set_rx_mode(struct net_device *dev);
4407 void __dev_set_rx_mode(struct net_device *dev);
4408 int dev_set_promiscuity(struct net_device *dev, int inc);
4409 int dev_set_allmulti(struct net_device *dev, int inc);
4410 void netdev_state_change(struct net_device *dev);
4411 void netdev_notify_peers(struct net_device *dev);
4412 void netdev_features_change(struct net_device *dev);
4413 /* Load a device via the kmod */
4414 void dev_load(struct net *net, const char *name);
4415 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4416 struct rtnl_link_stats64 *storage);
4417 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4418 const struct net_device_stats *netdev_stats);
4420 extern int netdev_max_backlog;
4421 extern int netdev_tstamp_prequeue;
4422 extern int weight_p;
4423 extern int dev_weight_rx_bias;
4424 extern int dev_weight_tx_bias;
4425 extern int dev_rx_weight;
4426 extern int dev_tx_weight;
4427 extern int gro_normal_batch;
4429 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4430 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4431 struct list_head **iter);
4432 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4433 struct list_head **iter);
4435 /* iterate through upper list, must be called under RCU read lock */
4436 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4437 for (iter = &(dev)->adj_list.upper, \
4438 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4440 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4442 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4443 int (*fn)(struct net_device *upper_dev,
4447 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4448 struct net_device *upper_dev);
4450 bool netdev_has_any_upper_dev(struct net_device *dev);
4452 void *netdev_lower_get_next_private(struct net_device *dev,
4453 struct list_head **iter);
4454 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4455 struct list_head **iter);
4457 #define netdev_for_each_lower_private(dev, priv, iter) \
4458 for (iter = (dev)->adj_list.lower.next, \
4459 priv = netdev_lower_get_next_private(dev, &(iter)); \
4461 priv = netdev_lower_get_next_private(dev, &(iter)))
4463 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4464 for (iter = &(dev)->adj_list.lower, \
4465 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4467 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4469 void *netdev_lower_get_next(struct net_device *dev,
4470 struct list_head **iter);
4472 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4473 for (iter = (dev)->adj_list.lower.next, \
4474 ldev = netdev_lower_get_next(dev, &(iter)); \
4476 ldev = netdev_lower_get_next(dev, &(iter)))
4478 struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
4479 struct list_head **iter);
4480 int netdev_walk_all_lower_dev(struct net_device *dev,
4481 int (*fn)(struct net_device *lower_dev,
4484 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4485 int (*fn)(struct net_device *lower_dev,
4489 void *netdev_adjacent_get_private(struct list_head *adj_list);
4490 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4491 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4492 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4493 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4494 struct netlink_ext_ack *extack);
4495 int netdev_master_upper_dev_link(struct net_device *dev,
4496 struct net_device *upper_dev,
4497 void *upper_priv, void *upper_info,
4498 struct netlink_ext_ack *extack);
4499 void netdev_upper_dev_unlink(struct net_device *dev,
4500 struct net_device *upper_dev);
4501 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4502 struct net_device *new_dev,
4503 struct net_device *dev,
4504 struct netlink_ext_ack *extack);
4505 void netdev_adjacent_change_commit(struct net_device *old_dev,
4506 struct net_device *new_dev,
4507 struct net_device *dev);
4508 void netdev_adjacent_change_abort(struct net_device *old_dev,
4509 struct net_device *new_dev,
4510 struct net_device *dev);
4511 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4512 void *netdev_lower_dev_get_private(struct net_device *dev,
4513 struct net_device *lower_dev);
4514 void netdev_lower_state_changed(struct net_device *lower_dev,
4515 void *lower_state_info);
4517 /* RSS keys are 40 or 52 bytes long */
4518 #define NETDEV_RSS_KEY_LEN 52
4519 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4520 void netdev_rss_key_fill(void *buffer, size_t len);
4522 int skb_checksum_help(struct sk_buff *skb);
4523 int skb_crc32c_csum_help(struct sk_buff *skb);
4524 int skb_csum_hwoffload_help(struct sk_buff *skb,
4525 const netdev_features_t features);
4527 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4528 netdev_features_t features, bool tx_path);
4529 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4530 netdev_features_t features);
4532 struct netdev_bonding_info {
4537 struct netdev_notifier_bonding_info {
4538 struct netdev_notifier_info info; /* must be first */
4539 struct netdev_bonding_info bonding_info;
4542 void netdev_bonding_info_change(struct net_device *dev,
4543 struct netdev_bonding_info *bonding_info);
4545 #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
4546 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
4548 static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
4555 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4557 return __skb_gso_segment(skb, features, true);
4559 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4561 static inline bool can_checksum_protocol(netdev_features_t features,
4564 if (protocol == htons(ETH_P_FCOE))
4565 return !!(features & NETIF_F_FCOE_CRC);
4567 /* Assume this is an IP checksum (not SCTP CRC) */
4569 if (features & NETIF_F_HW_CSUM) {
4570 /* Can checksum everything */
4575 case htons(ETH_P_IP):
4576 return !!(features & NETIF_F_IP_CSUM);
4577 case htons(ETH_P_IPV6):
4578 return !!(features & NETIF_F_IPV6_CSUM);
4585 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4587 static inline void netdev_rx_csum_fault(struct net_device *dev,
4588 struct sk_buff *skb)
4592 /* rx skb timestamps */
4593 void net_enable_timestamp(void);
4594 void net_disable_timestamp(void);
4596 #ifdef CONFIG_PROC_FS
4597 int __init dev_proc_init(void);
4599 #define dev_proc_init() 0
4602 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4603 struct sk_buff *skb, struct net_device *dev,
4606 __this_cpu_write(softnet_data.xmit.more, more);
4607 return ops->ndo_start_xmit(skb, dev);
4610 static inline bool netdev_xmit_more(void)
4612 return __this_cpu_read(softnet_data.xmit.more);
4615 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4616 struct netdev_queue *txq, bool more)
4618 const struct net_device_ops *ops = dev->netdev_ops;
4621 rc = __netdev_start_xmit(ops, skb, dev, more);
4622 if (rc == NETDEV_TX_OK)
4623 txq_trans_update(txq);
4628 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4630 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4633 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4635 return netdev_class_create_file_ns(class_attr, NULL);
4638 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4640 netdev_class_remove_file_ns(class_attr, NULL);
4643 extern const struct kobj_ns_type_operations net_ns_type_operations;
4645 const char *netdev_drivername(const struct net_device *dev);
4647 void linkwatch_run_queue(void);
4649 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4650 netdev_features_t f2)
4652 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4653 if (f1 & NETIF_F_HW_CSUM)
4654 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4656 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4662 static inline netdev_features_t netdev_get_wanted_features(
4663 struct net_device *dev)
4665 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4667 netdev_features_t netdev_increment_features(netdev_features_t all,
4668 netdev_features_t one, netdev_features_t mask);
4670 /* Allow TSO being used on stacked device :
4671 * Performing the GSO segmentation before last device
4672 * is a performance improvement.
4674 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4675 netdev_features_t mask)
4677 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4680 int __netdev_update_features(struct net_device *dev);
4681 void netdev_update_features(struct net_device *dev);
4682 void netdev_change_features(struct net_device *dev);
4684 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4685 struct net_device *dev);
4687 netdev_features_t passthru_features_check(struct sk_buff *skb,
4688 struct net_device *dev,
4689 netdev_features_t features);
4690 netdev_features_t netif_skb_features(struct sk_buff *skb);
4692 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4694 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4696 /* check flags correspondence */
4697 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4698 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4699 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4700 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4701 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4702 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4703 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4704 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4705 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4706 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4707 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4708 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4709 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4710 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4711 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4712 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4713 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4714 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4715 BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));
4717 return (features & feature) == feature;
4720 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4722 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4723 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4726 static inline bool netif_needs_gso(struct sk_buff *skb,
4727 netdev_features_t features)
4729 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4730 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4731 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4734 static inline void netif_set_gso_max_size(struct net_device *dev,
4737 dev->gso_max_size = size;
4740 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4741 int pulled_hlen, u16 mac_offset,
4744 skb->protocol = protocol;
4745 skb->encapsulation = 1;
4746 skb_push(skb, pulled_hlen);
4747 skb_reset_transport_header(skb);
4748 skb->mac_header = mac_offset;
4749 skb->network_header = skb->mac_header + mac_len;
4750 skb->mac_len = mac_len;
4753 static inline bool netif_is_macsec(const struct net_device *dev)
4755 return dev->priv_flags & IFF_MACSEC;
4758 static inline bool netif_is_macvlan(const struct net_device *dev)
4760 return dev->priv_flags & IFF_MACVLAN;
4763 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4765 return dev->priv_flags & IFF_MACVLAN_PORT;
4768 static inline bool netif_is_bond_master(const struct net_device *dev)
4770 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4773 static inline bool netif_is_bond_slave(const struct net_device *dev)
4775 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4778 static inline bool netif_supports_nofcs(struct net_device *dev)
4780 return dev->priv_flags & IFF_SUPP_NOFCS;
4783 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4785 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4788 static inline bool netif_is_l3_master(const struct net_device *dev)
4790 return dev->priv_flags & IFF_L3MDEV_MASTER;
4793 static inline bool netif_is_l3_slave(const struct net_device *dev)
4795 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4798 static inline bool netif_is_bridge_master(const struct net_device *dev)
4800 return dev->priv_flags & IFF_EBRIDGE;
4803 static inline bool netif_is_bridge_port(const struct net_device *dev)
4805 return dev->priv_flags & IFF_BRIDGE_PORT;
4808 static inline bool netif_is_ovs_master(const struct net_device *dev)
4810 return dev->priv_flags & IFF_OPENVSWITCH;
4813 static inline bool netif_is_ovs_port(const struct net_device *dev)
4815 return dev->priv_flags & IFF_OVS_DATAPATH;
4818 static inline bool netif_is_team_master(const struct net_device *dev)
4820 return dev->priv_flags & IFF_TEAM;
4823 static inline bool netif_is_team_port(const struct net_device *dev)
4825 return dev->priv_flags & IFF_TEAM_PORT;
4828 static inline bool netif_is_lag_master(const struct net_device *dev)
4830 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4833 static inline bool netif_is_lag_port(const struct net_device *dev)
4835 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4838 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4840 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4843 static inline bool netif_is_failover(const struct net_device *dev)
4845 return dev->priv_flags & IFF_FAILOVER;
4848 static inline bool netif_is_failover_slave(const struct net_device *dev)
4850 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4853 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4854 static inline void netif_keep_dst(struct net_device *dev)
4856 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4859 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4860 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4862 /* TODO: reserve and use an additional IFF bit, if we get more users */
4863 return dev->priv_flags & IFF_MACSEC;
4866 extern struct pernet_operations __net_initdata loopback_net_ops;
4868 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4870 /* netdev_printk helpers, similar to dev_printk */
4872 static inline const char *netdev_name(const struct net_device *dev)
4874 if (!dev->name[0] || strchr(dev->name, '%'))
4875 return "(unnamed net_device)";
4879 static inline bool netdev_unregistering(const struct net_device *dev)
4881 return dev->reg_state == NETREG_UNREGISTERING;
4884 static inline const char *netdev_reg_state(const struct net_device *dev)
4886 switch (dev->reg_state) {
4887 case NETREG_UNINITIALIZED: return " (uninitialized)";
4888 case NETREG_REGISTERED: return "";
4889 case NETREG_UNREGISTERING: return " (unregistering)";
4890 case NETREG_UNREGISTERED: return " (unregistered)";
4891 case NETREG_RELEASED: return " (released)";
4892 case NETREG_DUMMY: return " (dummy)";
4895 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4896 return " (unknown)";
4899 __printf(3, 4) __cold
4900 void netdev_printk(const char *level, const struct net_device *dev,
4901 const char *format, ...);
4902 __printf(2, 3) __cold
4903 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4904 __printf(2, 3) __cold
4905 void netdev_alert(const struct net_device *dev, const char *format, ...);
4906 __printf(2, 3) __cold
4907 void netdev_crit(const struct net_device *dev, const char *format, ...);
4908 __printf(2, 3) __cold
4909 void netdev_err(const struct net_device *dev, const char *format, ...);
4910 __printf(2, 3) __cold
4911 void netdev_warn(const struct net_device *dev, const char *format, ...);
4912 __printf(2, 3) __cold
4913 void netdev_notice(const struct net_device *dev, const char *format, ...);
4914 __printf(2, 3) __cold
4915 void netdev_info(const struct net_device *dev, const char *format, ...);
4917 #define netdev_level_once(level, dev, fmt, ...) \
4919 static bool __print_once __read_mostly; \
4921 if (!__print_once) { \
4922 __print_once = true; \
4923 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4927 #define netdev_emerg_once(dev, fmt, ...) \
4928 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4929 #define netdev_alert_once(dev, fmt, ...) \
4930 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4931 #define netdev_crit_once(dev, fmt, ...) \
4932 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4933 #define netdev_err_once(dev, fmt, ...) \
4934 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4935 #define netdev_warn_once(dev, fmt, ...) \
4936 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4937 #define netdev_notice_once(dev, fmt, ...) \
4938 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4939 #define netdev_info_once(dev, fmt, ...) \
4940 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4942 #define MODULE_ALIAS_NETDEV(device) \
4943 MODULE_ALIAS("netdev-" device)
4945 #if defined(CONFIG_DYNAMIC_DEBUG)
4946 #define netdev_dbg(__dev, format, args...) \
4948 dynamic_netdev_dbg(__dev, format, ##args); \
4950 #elif defined(DEBUG)
4951 #define netdev_dbg(__dev, format, args...) \
4952 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4954 #define netdev_dbg(__dev, format, args...) \
4957 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4961 #if defined(VERBOSE_DEBUG)
4962 #define netdev_vdbg netdev_dbg
4965 #define netdev_vdbg(dev, format, args...) \
4968 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4974 * netdev_WARN() acts like dev_printk(), but with the key difference
4975 * of using a WARN/WARN_ON to get the message out, including the
4976 * file/line information and a backtrace.
4978 #define netdev_WARN(dev, format, args...) \
4979 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4980 netdev_reg_state(dev), ##args)
4982 #define netdev_WARN_ONCE(dev, format, args...) \
4983 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4984 netdev_reg_state(dev), ##args)
4986 /* netif printk helpers, similar to netdev_printk */
4988 #define netif_printk(priv, type, level, dev, fmt, args...) \
4990 if (netif_msg_##type(priv)) \
4991 netdev_printk(level, (dev), fmt, ##args); \
4994 #define netif_level(level, priv, type, dev, fmt, args...) \
4996 if (netif_msg_##type(priv)) \
4997 netdev_##level(dev, fmt, ##args); \
5000 #define netif_emerg(priv, type, dev, fmt, args...) \
5001 netif_level(emerg, priv, type, dev, fmt, ##args)
5002 #define netif_alert(priv, type, dev, fmt, args...) \
5003 netif_level(alert, priv, type, dev, fmt, ##args)
5004 #define netif_crit(priv, type, dev, fmt, args...) \
5005 netif_level(crit, priv, type, dev, fmt, ##args)
5006 #define netif_err(priv, type, dev, fmt, args...) \
5007 netif_level(err, priv, type, dev, fmt, ##args)
5008 #define netif_warn(priv, type, dev, fmt, args...) \
5009 netif_level(warn, priv, type, dev, fmt, ##args)
5010 #define netif_notice(priv, type, dev, fmt, args...) \
5011 netif_level(notice, priv, type, dev, fmt, ##args)
5012 #define netif_info(priv, type, dev, fmt, args...) \
5013 netif_level(info, priv, type, dev, fmt, ##args)
5015 #if defined(CONFIG_DYNAMIC_DEBUG)
5016 #define netif_dbg(priv, type, netdev, format, args...) \
5018 if (netif_msg_##type(priv)) \
5019 dynamic_netdev_dbg(netdev, format, ##args); \
5021 #elif defined(DEBUG)
5022 #define netif_dbg(priv, type, dev, format, args...) \
5023 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
5025 #define netif_dbg(priv, type, dev, format, args...) \
5028 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5033 /* if @cond then downgrade to debug, else print at @level */
5034 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
5037 netif_dbg(priv, type, netdev, fmt, ##args); \
5039 netif_ ## level(priv, type, netdev, fmt, ##args); \
5042 #if defined(VERBOSE_DEBUG)
5043 #define netif_vdbg netif_dbg
5045 #define netif_vdbg(priv, type, dev, format, args...) \
5048 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5054 * The list of packet types we will receive (as opposed to discard)
5055 * and the routines to invoke.
5057 * Why 16. Because with 16 the only overlap we get on a hash of the
5058 * low nibble of the protocol value is RARP/SNAP/X.25.
5072 #define PTYPE_HASH_SIZE (16)
5073 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
5075 extern struct net_device *blackhole_netdev;
5077 #endif /* _LINUX_NETDEVICE_H */