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>
31 #include <asm/local.h>
33 #include <linux/percpu.h>
34 #include <linux/rculist.h>
35 #include <linux/workqueue.h>
36 #include <linux/dynamic_queue_limits.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>
51 #include <linux/rbtree.h>
52 #include <net/net_trackers.h>
59 struct ip_tunnel_parm;
60 struct macsec_context;
66 /* 802.15.4 specific */
69 /* UDP Tunnel offloads */
70 struct udp_tunnel_info;
71 struct udp_tunnel_nic_info;
72 struct udp_tunnel_nic;
76 void synchronize_net(void);
77 void netdev_set_default_ethtool_ops(struct net_device *dev,
78 const struct ethtool_ops *ops);
80 /* Backlog congestion levels */
81 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
82 #define NET_RX_DROP 1 /* packet dropped */
84 #define MAX_NEST_DEV 8
87 * Transmit return codes: transmit return codes originate from three different
90 * - qdisc return codes
91 * - driver transmit return codes
94 * Drivers are allowed to return any one of those in their hard_start_xmit()
95 * function. Real network devices commonly used with qdiscs should only return
96 * the driver transmit return codes though - when qdiscs are used, the actual
97 * transmission happens asynchronously, so the value is not propagated to
98 * higher layers. Virtual network devices transmit synchronously; in this case
99 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
100 * others are propagated to higher layers.
103 /* qdisc ->enqueue() return codes. */
104 #define NET_XMIT_SUCCESS 0x00
105 #define NET_XMIT_DROP 0x01 /* skb dropped */
106 #define NET_XMIT_CN 0x02 /* congestion notification */
107 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
109 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
110 * indicates that the device will soon be dropping packets, or already drops
111 * some packets of the same priority; prompting us to send less aggressively. */
112 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
113 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
115 /* Driver transmit return codes */
116 #define NETDEV_TX_MASK 0xf0
119 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
120 NETDEV_TX_OK = 0x00, /* driver took care of packet */
121 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
123 typedef enum netdev_tx netdev_tx_t;
126 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
127 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
129 static inline bool dev_xmit_complete(int rc)
132 * Positive cases with an skb consumed by a driver:
133 * - successful transmission (rc == NETDEV_TX_OK)
134 * - error while transmitting (rc < 0)
135 * - error while queueing to a different device (rc & NET_XMIT_MASK)
137 if (likely(rc < NET_XMIT_MASK))
144 * Compute the worst-case header length according to the protocols
148 #if defined(CONFIG_HYPERV_NET)
149 # define LL_MAX_HEADER 128
150 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
151 # if defined(CONFIG_MAC80211_MESH)
152 # define LL_MAX_HEADER 128
154 # define LL_MAX_HEADER 96
157 # define LL_MAX_HEADER 32
160 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
161 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
162 #define MAX_HEADER LL_MAX_HEADER
164 #define MAX_HEADER (LL_MAX_HEADER + 48)
168 * Old network device statistics. Fields are native words
169 * (unsigned long) so they can be read and written atomically.
172 struct net_device_stats {
173 unsigned long rx_packets;
174 unsigned long tx_packets;
175 unsigned long rx_bytes;
176 unsigned long tx_bytes;
177 unsigned long rx_errors;
178 unsigned long tx_errors;
179 unsigned long rx_dropped;
180 unsigned long tx_dropped;
181 unsigned long multicast;
182 unsigned long collisions;
183 unsigned long rx_length_errors;
184 unsigned long rx_over_errors;
185 unsigned long rx_crc_errors;
186 unsigned long rx_frame_errors;
187 unsigned long rx_fifo_errors;
188 unsigned long rx_missed_errors;
189 unsigned long tx_aborted_errors;
190 unsigned long tx_carrier_errors;
191 unsigned long tx_fifo_errors;
192 unsigned long tx_heartbeat_errors;
193 unsigned long tx_window_errors;
194 unsigned long rx_compressed;
195 unsigned long tx_compressed;
198 /* per-cpu stats, allocated on demand.
199 * Try to fit them in a single cache line, for dev_get_stats() sake.
201 struct net_device_core_stats {
204 local_t rx_nohandler;
205 } __aligned(4 * sizeof(local_t));
207 #include <linux/cache.h>
208 #include <linux/skbuff.h>
211 #include <linux/static_key.h>
212 extern struct static_key_false rps_needed;
213 extern struct static_key_false rfs_needed;
220 struct netdev_hw_addr {
221 struct list_head list;
223 unsigned char addr[MAX_ADDR_LEN];
225 #define NETDEV_HW_ADDR_T_LAN 1
226 #define NETDEV_HW_ADDR_T_SAN 2
227 #define NETDEV_HW_ADDR_T_UNICAST 3
228 #define NETDEV_HW_ADDR_T_MULTICAST 4
233 struct rcu_head rcu_head;
236 struct netdev_hw_addr_list {
237 struct list_head list;
240 /* Auxiliary tree for faster lookup on addition and deletion */
244 #define netdev_hw_addr_list_count(l) ((l)->count)
245 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
246 #define netdev_hw_addr_list_for_each(ha, l) \
247 list_for_each_entry(ha, &(l)->list, list)
249 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
250 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
251 #define netdev_for_each_uc_addr(ha, dev) \
252 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
254 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
255 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
256 #define netdev_for_each_mc_addr(ha, dev) \
257 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
263 /* cached hardware header; allow for machine alignment needs. */
264 #define HH_DATA_MOD 16
265 #define HH_DATA_OFF(__len) \
266 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
267 #define HH_DATA_ALIGN(__len) \
268 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
269 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
272 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
274 * dev->hard_header_len ? (dev->hard_header_len +
275 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
277 * We could use other alignment values, but we must maintain the
278 * relationship HH alignment <= LL alignment.
280 #define LL_RESERVED_SPACE(dev) \
281 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
282 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
283 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
286 int (*create) (struct sk_buff *skb, struct net_device *dev,
287 unsigned short type, const void *daddr,
288 const void *saddr, unsigned int len);
289 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
290 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
291 void (*cache_update)(struct hh_cache *hh,
292 const struct net_device *dev,
293 const unsigned char *haddr);
294 bool (*validate)(const char *ll_header, unsigned int len);
295 __be16 (*parse_protocol)(const struct sk_buff *skb);
298 /* These flag bits are private to the generic network queueing
299 * layer; they may not be explicitly referenced by any other
303 enum netdev_state_t {
305 __LINK_STATE_PRESENT,
306 __LINK_STATE_NOCARRIER,
307 __LINK_STATE_LINKWATCH_PENDING,
308 __LINK_STATE_DORMANT,
309 __LINK_STATE_TESTING,
313 struct list_head list;
318 * size of gro hash buckets, must less than bit number of
319 * napi_struct::gro_bitmask
321 #define GRO_HASH_BUCKETS 8
324 * Structure for NAPI scheduling similar to tasklet but with weighting
327 /* The poll_list must only be managed by the entity which
328 * changes the state of the NAPI_STATE_SCHED bit. This means
329 * whoever atomically sets that bit can add this napi_struct
330 * to the per-CPU poll_list, and whoever clears that bit
331 * can remove from the list right before clearing the bit.
333 struct list_head poll_list;
337 int defer_hard_irqs_count;
338 unsigned long gro_bitmask;
339 int (*poll)(struct napi_struct *, int);
340 #ifdef CONFIG_NETPOLL
343 struct net_device *dev;
344 struct gro_list gro_hash[GRO_HASH_BUCKETS];
346 struct list_head rx_list; /* Pending GRO_NORMAL skbs */
347 int rx_count; /* length of rx_list */
348 struct hrtimer timer;
349 struct list_head dev_list;
350 struct hlist_node napi_hash_node;
351 unsigned int napi_id;
352 struct task_struct *thread;
356 NAPI_STATE_SCHED, /* Poll is scheduled */
357 NAPI_STATE_MISSED, /* reschedule a napi */
358 NAPI_STATE_DISABLE, /* Disable pending */
359 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
360 NAPI_STATE_LISTED, /* NAPI added to system lists */
361 NAPI_STATE_NO_BUSY_POLL, /* Do not add in napi_hash, no busy polling */
362 NAPI_STATE_IN_BUSY_POLL, /* sk_busy_loop() owns this NAPI */
363 NAPI_STATE_PREFER_BUSY_POLL, /* prefer busy-polling over softirq processing*/
364 NAPI_STATE_THREADED, /* The poll is performed inside its own thread*/
365 NAPI_STATE_SCHED_THREADED, /* Napi is currently scheduled in threaded mode */
369 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
370 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
371 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
372 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
373 NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED),
374 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
375 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
376 NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL),
377 NAPIF_STATE_THREADED = BIT(NAPI_STATE_THREADED),
378 NAPIF_STATE_SCHED_THREADED = BIT(NAPI_STATE_SCHED_THREADED),
388 typedef enum gro_result gro_result_t;
391 * enum rx_handler_result - Possible return values for rx_handlers.
392 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
394 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
395 * case skb->dev was changed by rx_handler.
396 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
397 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
399 * rx_handlers are functions called from inside __netif_receive_skb(), to do
400 * special processing of the skb, prior to delivery to protocol handlers.
402 * Currently, a net_device can only have a single rx_handler registered. Trying
403 * to register a second rx_handler will return -EBUSY.
405 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
406 * To unregister a rx_handler on a net_device, use
407 * netdev_rx_handler_unregister().
409 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
412 * If the rx_handler consumed the skb in some way, it should return
413 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
414 * the skb to be delivered in some other way.
416 * If the rx_handler changed skb->dev, to divert the skb to another
417 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
418 * new device will be called if it exists.
420 * If the rx_handler decides the skb should be ignored, it should return
421 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
422 * are registered on exact device (ptype->dev == skb->dev).
424 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
425 * delivered, it should return RX_HANDLER_PASS.
427 * A device without a registered rx_handler will behave as if rx_handler
428 * returned RX_HANDLER_PASS.
431 enum rx_handler_result {
437 typedef enum rx_handler_result rx_handler_result_t;
438 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
440 void __napi_schedule(struct napi_struct *n);
441 void __napi_schedule_irqoff(struct napi_struct *n);
443 static inline bool napi_disable_pending(struct napi_struct *n)
445 return test_bit(NAPI_STATE_DISABLE, &n->state);
448 static inline bool napi_prefer_busy_poll(struct napi_struct *n)
450 return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state);
453 bool napi_schedule_prep(struct napi_struct *n);
456 * napi_schedule - schedule NAPI poll
459 * Schedule NAPI poll routine to be called if it is not already
462 static inline void napi_schedule(struct napi_struct *n)
464 if (napi_schedule_prep(n))
469 * napi_schedule_irqoff - schedule NAPI poll
472 * Variant of napi_schedule(), assuming hard irqs are masked.
474 static inline void napi_schedule_irqoff(struct napi_struct *n)
476 if (napi_schedule_prep(n))
477 __napi_schedule_irqoff(n);
480 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
481 static inline bool napi_reschedule(struct napi_struct *napi)
483 if (napi_schedule_prep(napi)) {
484 __napi_schedule(napi);
490 bool napi_complete_done(struct napi_struct *n, int work_done);
492 * napi_complete - NAPI processing complete
495 * Mark NAPI processing as complete.
496 * Consider using napi_complete_done() instead.
497 * Return false if device should avoid rearming interrupts.
499 static inline bool napi_complete(struct napi_struct *n)
501 return napi_complete_done(n, 0);
504 int dev_set_threaded(struct net_device *dev, bool threaded);
507 * napi_disable - prevent NAPI from scheduling
510 * Stop NAPI from being scheduled on this context.
511 * Waits till any outstanding processing completes.
513 void napi_disable(struct napi_struct *n);
515 void napi_enable(struct napi_struct *n);
518 * napi_synchronize - wait until NAPI is not running
521 * Wait until NAPI is done being scheduled on this context.
522 * Waits till any outstanding processing completes but
523 * does not disable future activations.
525 static inline void napi_synchronize(const struct napi_struct *n)
527 if (IS_ENABLED(CONFIG_SMP))
528 while (test_bit(NAPI_STATE_SCHED, &n->state))
535 * napi_if_scheduled_mark_missed - if napi is running, set the
539 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
542 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
544 unsigned long val, new;
547 val = READ_ONCE(n->state);
548 if (val & NAPIF_STATE_DISABLE)
551 if (!(val & NAPIF_STATE_SCHED))
554 new = val | NAPIF_STATE_MISSED;
555 } while (cmpxchg(&n->state, val, new) != val);
560 enum netdev_queue_state_t {
561 __QUEUE_STATE_DRV_XOFF,
562 __QUEUE_STATE_STACK_XOFF,
563 __QUEUE_STATE_FROZEN,
566 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
567 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
568 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
570 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
571 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
573 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
577 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
578 * netif_tx_* functions below are used to manipulate this flag. The
579 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
580 * queue independently. The netif_xmit_*stopped functions below are called
581 * to check if the queue has been stopped by the driver or stack (either
582 * of the XOFF bits are set in the state). Drivers should not need to call
583 * netif_xmit*stopped functions, they should only be using netif_tx_*.
586 struct netdev_queue {
590 struct net_device *dev;
591 netdevice_tracker dev_tracker;
593 struct Qdisc __rcu *qdisc;
594 struct Qdisc *qdisc_sleeping;
598 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
601 unsigned long tx_maxrate;
603 * Number of TX timeouts for this queue
604 * (/sys/class/net/DEV/Q/trans_timeout)
606 atomic_long_t trans_timeout;
608 /* Subordinate device that the queue has been assigned to */
609 struct net_device *sb_dev;
610 #ifdef CONFIG_XDP_SOCKETS
611 struct xsk_buff_pool *pool;
616 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
619 * Time (in jiffies) of last Tx
621 unsigned long trans_start;
628 } ____cacheline_aligned_in_smp;
630 extern int sysctl_fb_tunnels_only_for_init_net;
631 extern int sysctl_devconf_inherit_init_net;
634 * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns
635 * == 1 : For initns only
638 static inline bool net_has_fallback_tunnels(const struct net *net)
640 return !IS_ENABLED(CONFIG_SYSCTL) ||
641 !sysctl_fb_tunnels_only_for_init_net ||
642 (net == &init_net && sysctl_fb_tunnels_only_for_init_net == 1);
645 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
647 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
654 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
656 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
663 * This structure holds an RPS map which can be of variable length. The
664 * map is an array of CPUs.
671 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
674 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
675 * tail pointer for that CPU's input queue at the time of last enqueue, and
676 * a hardware filter index.
678 struct rps_dev_flow {
681 unsigned int last_qtail;
683 #define RPS_NO_FILTER 0xffff
686 * The rps_dev_flow_table structure contains a table of flow mappings.
688 struct rps_dev_flow_table {
691 struct rps_dev_flow flows[];
693 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
694 ((_num) * sizeof(struct rps_dev_flow)))
697 * The rps_sock_flow_table contains mappings of flows to the last CPU
698 * on which they were processed by the application (set in recvmsg).
699 * Each entry is a 32bit value. Upper part is the high-order bits
700 * of flow hash, lower part is CPU number.
701 * rps_cpu_mask is used to partition the space, depending on number of
702 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
703 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
704 * meaning we use 32-6=26 bits for the hash.
706 struct rps_sock_flow_table {
709 u32 ents[] ____cacheline_aligned_in_smp;
711 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
713 #define RPS_NO_CPU 0xffff
715 extern u32 rps_cpu_mask;
716 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
718 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
722 unsigned int index = hash & table->mask;
723 u32 val = hash & ~rps_cpu_mask;
725 /* We only give a hint, preemption can change CPU under us */
726 val |= raw_smp_processor_id();
728 if (table->ents[index] != val)
729 table->ents[index] = val;
733 #ifdef CONFIG_RFS_ACCEL
734 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
737 #endif /* CONFIG_RPS */
739 /* This structure contains an instance of an RX queue. */
740 struct netdev_rx_queue {
741 struct xdp_rxq_info xdp_rxq;
743 struct rps_map __rcu *rps_map;
744 struct rps_dev_flow_table __rcu *rps_flow_table;
747 struct net_device *dev;
748 netdevice_tracker dev_tracker;
750 #ifdef CONFIG_XDP_SOCKETS
751 struct xsk_buff_pool *pool;
753 } ____cacheline_aligned_in_smp;
756 * RX queue sysfs structures and functions.
758 struct rx_queue_attribute {
759 struct attribute attr;
760 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
761 ssize_t (*store)(struct netdev_rx_queue *queue,
762 const char *buf, size_t len);
765 /* XPS map type and offset of the xps map within net_device->xps_maps[]. */
774 * This structure holds an XPS map which can be of variable length. The
775 * map is an array of queues.
779 unsigned int alloc_len;
783 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
784 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
785 - sizeof(struct xps_map)) / sizeof(u16))
788 * This structure holds all XPS maps for device. Maps are indexed by CPU.
790 * We keep track of the number of cpus/rxqs used when the struct is allocated,
791 * in nr_ids. This will help not accessing out-of-bound memory.
793 * We keep track of the number of traffic classes used when the struct is
794 * allocated, in num_tc. This will be used to navigate the maps, to ensure we're
795 * not crossing its upper bound, as the original dev->num_tc can be updated in
798 struct xps_dev_maps {
802 struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */
805 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
806 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
808 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
809 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
811 #endif /* CONFIG_XPS */
813 #define TC_MAX_QUEUE 16
814 #define TC_BITMASK 15
815 /* HW offloaded queuing disciplines txq count and offset maps */
816 struct netdev_tc_txq {
821 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
823 * This structure is to hold information about the device
824 * configured to run FCoE protocol stack.
826 struct netdev_fcoe_hbainfo {
827 char manufacturer[64];
828 char serial_number[64];
829 char hardware_version[64];
830 char driver_version[64];
831 char optionrom_version[64];
832 char firmware_version[64];
834 char model_description[256];
838 #define MAX_PHYS_ITEM_ID_LEN 32
840 /* This structure holds a unique identifier to identify some
841 * physical item (port for example) used by a netdevice.
843 struct netdev_phys_item_id {
844 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
845 unsigned char id_len;
848 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
849 struct netdev_phys_item_id *b)
851 return a->id_len == b->id_len &&
852 memcmp(a->id, b->id, a->id_len) == 0;
855 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
857 struct net_device *sb_dev);
859 enum net_device_path_type {
860 DEV_PATH_ETHERNET = 0,
867 struct net_device_path {
868 enum net_device_path_type type;
869 const struct net_device *dev;
878 DEV_PATH_BR_VLAN_KEEP,
879 DEV_PATH_BR_VLAN_TAG,
880 DEV_PATH_BR_VLAN_UNTAG,
881 DEV_PATH_BR_VLAN_UNTAG_HW,
893 #define NET_DEVICE_PATH_STACK_MAX 5
894 #define NET_DEVICE_PATH_VLAN_MAX 2
896 struct net_device_path_stack {
898 struct net_device_path path[NET_DEVICE_PATH_STACK_MAX];
901 struct net_device_path_ctx {
902 const struct net_device *dev;
909 } vlan[NET_DEVICE_PATH_VLAN_MAX];
913 TC_SETUP_QDISC_MQPRIO,
916 TC_SETUP_CLSMATCHALL,
926 TC_SETUP_QDISC_TAPRIO,
935 /* These structures hold the attributes of bpf state that are being passed
936 * to the netdevice through the bpf op.
938 enum bpf_netdev_command {
939 /* Set or clear a bpf program used in the earliest stages of packet
940 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
941 * is responsible for calling bpf_prog_put on any old progs that are
942 * stored. In case of error, the callee need not release the new prog
943 * reference, but on success it takes ownership and must bpf_prog_put
944 * when it is no longer used.
948 /* BPF program for offload callbacks, invoked at program load time. */
949 BPF_OFFLOAD_MAP_ALLOC,
950 BPF_OFFLOAD_MAP_FREE,
954 struct bpf_prog_offload_ops;
955 struct netlink_ext_ack;
957 struct xdp_dev_bulk_queue;
967 struct bpf_xdp_entity {
968 struct bpf_prog *prog;
969 struct bpf_xdp_link *link;
973 enum bpf_netdev_command command;
978 struct bpf_prog *prog;
979 struct netlink_ext_ack *extack;
981 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
983 struct bpf_offloaded_map *offmap;
985 /* XDP_SETUP_XSK_POOL */
987 struct xsk_buff_pool *pool;
993 /* Flags for ndo_xsk_wakeup. */
994 #define XDP_WAKEUP_RX (1 << 0)
995 #define XDP_WAKEUP_TX (1 << 1)
997 #ifdef CONFIG_XFRM_OFFLOAD
999 int (*xdo_dev_state_add) (struct xfrm_state *x);
1000 void (*xdo_dev_state_delete) (struct xfrm_state *x);
1001 void (*xdo_dev_state_free) (struct xfrm_state *x);
1002 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
1003 struct xfrm_state *x);
1004 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
1008 struct dev_ifalias {
1009 struct rcu_head rcuhead;
1016 struct netdev_name_node {
1017 struct hlist_node hlist;
1018 struct list_head list;
1019 struct net_device *dev;
1023 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
1024 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
1026 struct netdev_net_notifier {
1027 struct list_head list;
1028 struct notifier_block *nb;
1032 * This structure defines the management hooks for network devices.
1033 * The following hooks can be defined; unless noted otherwise, they are
1034 * optional and can be filled with a null pointer.
1036 * int (*ndo_init)(struct net_device *dev);
1037 * This function is called once when a network device is registered.
1038 * The network device can use this for any late stage initialization
1039 * or semantic validation. It can fail with an error code which will
1040 * be propagated back to register_netdev.
1042 * void (*ndo_uninit)(struct net_device *dev);
1043 * This function is called when device is unregistered or when registration
1044 * fails. It is not called if init fails.
1046 * int (*ndo_open)(struct net_device *dev);
1047 * This function is called when a network device transitions to the up
1050 * int (*ndo_stop)(struct net_device *dev);
1051 * This function is called when a network device transitions to the down
1054 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1055 * struct net_device *dev);
1056 * Called when a packet needs to be transmitted.
1057 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
1058 * the queue before that can happen; it's for obsolete devices and weird
1059 * corner cases, but the stack really does a non-trivial amount
1060 * of useless work if you return NETDEV_TX_BUSY.
1061 * Required; cannot be NULL.
1063 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1064 * struct net_device *dev
1065 * netdev_features_t features);
1066 * Called by core transmit path to determine if device is capable of
1067 * performing offload operations on a given packet. This is to give
1068 * the device an opportunity to implement any restrictions that cannot
1069 * be otherwise expressed by feature flags. The check is called with
1070 * the set of features that the stack has calculated and it returns
1071 * those the driver believes to be appropriate.
1073 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
1074 * struct net_device *sb_dev);
1075 * Called to decide which queue to use when device supports multiple
1078 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
1079 * This function is called to allow device receiver to make
1080 * changes to configuration when multicast or promiscuous is enabled.
1082 * void (*ndo_set_rx_mode)(struct net_device *dev);
1083 * This function is called device changes address list filtering.
1084 * If driver handles unicast address filtering, it should set
1085 * IFF_UNICAST_FLT in its priv_flags.
1087 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1088 * This function is called when the Media Access Control address
1089 * needs to be changed. If this interface is not defined, the
1090 * MAC address can not be changed.
1092 * int (*ndo_validate_addr)(struct net_device *dev);
1093 * Test if Media Access Control address is valid for the device.
1095 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1096 * Old-style ioctl entry point. This is used internally by the
1097 * appletalk and ieee802154 subsystems but is no longer called by
1098 * the device ioctl handler.
1100 * int (*ndo_siocbond)(struct net_device *dev, struct ifreq *ifr, int cmd);
1101 * Used by the bonding driver for its device specific ioctls:
1102 * SIOCBONDENSLAVE, SIOCBONDRELEASE, SIOCBONDSETHWADDR, SIOCBONDCHANGEACTIVE,
1103 * SIOCBONDSLAVEINFOQUERY, and SIOCBONDINFOQUERY
1105 * * int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1106 * Called for ethernet specific ioctls: SIOCGMIIPHY, SIOCGMIIREG,
1107 * SIOCSMIIREG, SIOCSHWTSTAMP and SIOCGHWTSTAMP.
1109 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1110 * Used to set network devices bus interface parameters. This interface
1111 * is retained for legacy reasons; new devices should use the bus
1112 * interface (PCI) for low level management.
1114 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1115 * Called when a user wants to change the Maximum Transfer Unit
1118 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
1119 * Callback used when the transmitter has not made any progress
1120 * for dev->watchdog ticks.
1122 * void (*ndo_get_stats64)(struct net_device *dev,
1123 * struct rtnl_link_stats64 *storage);
1124 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1125 * Called when a user wants to get the network device usage
1126 * statistics. Drivers must do one of the following:
1127 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1128 * rtnl_link_stats64 structure passed by the caller.
1129 * 2. Define @ndo_get_stats to update a net_device_stats structure
1130 * (which should normally be dev->stats) and return a pointer to
1131 * it. The structure may be changed asynchronously only if each
1132 * field is written atomically.
1133 * 3. Update dev->stats asynchronously and atomically, and define
1134 * neither operation.
1136 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1137 * Return true if this device supports offload stats of this attr_id.
1139 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1141 * Get statistics for offload operations by attr_id. Write it into the
1142 * attr_data pointer.
1144 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1145 * If device supports VLAN filtering this function is called when a
1146 * VLAN id is registered.
1148 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1149 * If device supports VLAN filtering this function is called when a
1150 * VLAN id is unregistered.
1152 * void (*ndo_poll_controller)(struct net_device *dev);
1154 * SR-IOV management functions.
1155 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1156 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1157 * u8 qos, __be16 proto);
1158 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1160 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1161 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1162 * int (*ndo_get_vf_config)(struct net_device *dev,
1163 * int vf, struct ifla_vf_info *ivf);
1164 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1165 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1166 * struct nlattr *port[]);
1168 * Enable or disable the VF ability to query its RSS Redirection Table and
1169 * Hash Key. This is needed since on some devices VF share this information
1170 * with PF and querying it may introduce a theoretical security risk.
1171 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1172 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1173 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1175 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1176 * This is always called from the stack with the rtnl lock held and netif
1177 * tx queues stopped. This allows the netdevice to perform queue
1178 * management safely.
1180 * Fiber Channel over Ethernet (FCoE) offload functions.
1181 * int (*ndo_fcoe_enable)(struct net_device *dev);
1182 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1183 * so the underlying device can perform whatever needed configuration or
1184 * initialization to support acceleration of FCoE traffic.
1186 * int (*ndo_fcoe_disable)(struct net_device *dev);
1187 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1188 * so the underlying device can perform whatever needed clean-ups to
1189 * stop supporting acceleration of FCoE traffic.
1191 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1192 * struct scatterlist *sgl, unsigned int sgc);
1193 * Called when the FCoE Initiator wants to initialize an I/O that
1194 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1195 * perform necessary setup and returns 1 to indicate the device is set up
1196 * successfully to perform DDP on this I/O, otherwise this returns 0.
1198 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1199 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1200 * indicated by the FC exchange id 'xid', so the underlying device can
1201 * clean up and reuse resources for later DDP requests.
1203 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1204 * struct scatterlist *sgl, unsigned int sgc);
1205 * Called when the FCoE Target wants to initialize an I/O that
1206 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1207 * perform necessary setup and returns 1 to indicate the device is set up
1208 * successfully to perform DDP on this I/O, otherwise this returns 0.
1210 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1211 * struct netdev_fcoe_hbainfo *hbainfo);
1212 * Called when the FCoE Protocol stack wants information on the underlying
1213 * device. This information is utilized by the FCoE protocol stack to
1214 * register attributes with Fiber Channel management service as per the
1215 * FC-GS Fabric Device Management Information(FDMI) specification.
1217 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1218 * Called when the underlying device wants to override default World Wide
1219 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1220 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1221 * protocol stack to use.
1224 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1225 * u16 rxq_index, u32 flow_id);
1226 * Set hardware filter for RFS. rxq_index is the target queue index;
1227 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1228 * Return the filter ID on success, or a negative error code.
1230 * Slave management functions (for bridge, bonding, etc).
1231 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1232 * Called to make another netdev an underling.
1234 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1235 * Called to release previously enslaved netdev.
1237 * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev,
1238 * struct sk_buff *skb,
1240 * Get the xmit slave of master device. If all_slaves is true, function
1241 * assume all the slaves can transmit.
1243 * Feature/offload setting functions.
1244 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1245 * netdev_features_t features);
1246 * Adjusts the requested feature flags according to device-specific
1247 * constraints, and returns the resulting flags. Must not modify
1250 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1251 * Called to update device configuration to new features. Passed
1252 * feature set might be less than what was returned by ndo_fix_features()).
1253 * Must return >0 or -errno if it changed dev->features itself.
1255 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1256 * struct net_device *dev,
1257 * const unsigned char *addr, u16 vid, u16 flags,
1258 * struct netlink_ext_ack *extack);
1259 * Adds an FDB entry to dev for addr.
1260 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1261 * struct net_device *dev,
1262 * const unsigned char *addr, u16 vid)
1263 * Deletes the FDB entry from dev coresponding to addr.
1264 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1265 * struct net_device *dev, struct net_device *filter_dev,
1267 * Used to add FDB entries to dump requests. Implementers should add
1268 * entries to skb and update idx with the number of entries.
1270 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1271 * u16 flags, struct netlink_ext_ack *extack)
1272 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1273 * struct net_device *dev, u32 filter_mask,
1275 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1278 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1279 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1280 * which do not represent real hardware may define this to allow their
1281 * userspace components to manage their virtual carrier state. Devices
1282 * that determine carrier state from physical hardware properties (eg
1283 * network cables) or protocol-dependent mechanisms (eg
1284 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1286 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1287 * struct netdev_phys_item_id *ppid);
1288 * Called to get ID of physical port of this device. If driver does
1289 * not implement this, it is assumed that the hw is not able to have
1290 * multiple net devices on single physical port.
1292 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1293 * struct netdev_phys_item_id *ppid)
1294 * Called to get the parent ID of the physical port of this device.
1296 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1297 * struct net_device *dev)
1298 * Called by upper layer devices to accelerate switching or other
1299 * station functionality into hardware. 'pdev is the lowerdev
1300 * to use for the offload and 'dev' is the net device that will
1301 * back the offload. Returns a pointer to the private structure
1302 * the upper layer will maintain.
1303 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1304 * Called by upper layer device to delete the station created
1305 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1306 * the station and priv is the structure returned by the add
1308 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1309 * int queue_index, u32 maxrate);
1310 * Called when a user wants to set a max-rate limitation of specific
1312 * int (*ndo_get_iflink)(const struct net_device *dev);
1313 * Called to get the iflink value of this device.
1314 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1315 * This function is used to get egress tunnel information for given skb.
1316 * This is useful for retrieving outer tunnel header parameters while
1318 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1319 * This function is used to specify the headroom that the skb must
1320 * consider when allocation skb during packet reception. Setting
1321 * appropriate rx headroom value allows avoiding skb head copy on
1322 * forward. Setting a negative value resets the rx headroom to the
1324 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1325 * This function is used to set or query state related to XDP on the
1326 * netdevice and manage BPF offload. See definition of
1327 * enum bpf_netdev_command for details.
1328 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1330 * This function is used to submit @n XDP packets for transmit on a
1331 * netdevice. Returns number of frames successfully transmitted, frames
1332 * that got dropped are freed/returned via xdp_return_frame().
1333 * Returns negative number, means general error invoking ndo, meaning
1334 * no frames were xmit'ed and core-caller will free all frames.
1335 * struct net_device *(*ndo_xdp_get_xmit_slave)(struct net_device *dev,
1336 * struct xdp_buff *xdp);
1337 * Get the xmit slave of master device based on the xdp_buff.
1338 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1339 * This function is used to wake up the softirq, ksoftirqd or kthread
1340 * responsible for sending and/or receiving packets on a specific
1341 * queue id bound to an AF_XDP socket. The flags field specifies if
1342 * only RX, only Tx, or both should be woken up using the flags
1343 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1344 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1345 * Get devlink port instance associated with a given netdev.
1346 * Called with a reference on the netdevice and devlink locks only,
1347 * rtnl_lock is not held.
1348 * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *p,
1350 * Add, change, delete or get information on an IPv4 tunnel.
1351 * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev);
1352 * If a device is paired with a peer device, return the peer instance.
1353 * The caller must be under RCU read context.
1354 * int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, struct net_device_path *path);
1355 * Get the forwarding path to reach the real device from the HW destination address
1357 struct net_device_ops {
1358 int (*ndo_init)(struct net_device *dev);
1359 void (*ndo_uninit)(struct net_device *dev);
1360 int (*ndo_open)(struct net_device *dev);
1361 int (*ndo_stop)(struct net_device *dev);
1362 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1363 struct net_device *dev);
1364 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1365 struct net_device *dev,
1366 netdev_features_t features);
1367 u16 (*ndo_select_queue)(struct net_device *dev,
1368 struct sk_buff *skb,
1369 struct net_device *sb_dev);
1370 void (*ndo_change_rx_flags)(struct net_device *dev,
1372 void (*ndo_set_rx_mode)(struct net_device *dev);
1373 int (*ndo_set_mac_address)(struct net_device *dev,
1375 int (*ndo_validate_addr)(struct net_device *dev);
1376 int (*ndo_do_ioctl)(struct net_device *dev,
1377 struct ifreq *ifr, int cmd);
1378 int (*ndo_eth_ioctl)(struct net_device *dev,
1379 struct ifreq *ifr, int cmd);
1380 int (*ndo_siocbond)(struct net_device *dev,
1381 struct ifreq *ifr, int cmd);
1382 int (*ndo_siocwandev)(struct net_device *dev,
1383 struct if_settings *ifs);
1384 int (*ndo_siocdevprivate)(struct net_device *dev,
1386 void __user *data, int cmd);
1387 int (*ndo_set_config)(struct net_device *dev,
1389 int (*ndo_change_mtu)(struct net_device *dev,
1391 int (*ndo_neigh_setup)(struct net_device *dev,
1392 struct neigh_parms *);
1393 void (*ndo_tx_timeout) (struct net_device *dev,
1394 unsigned int txqueue);
1396 void (*ndo_get_stats64)(struct net_device *dev,
1397 struct rtnl_link_stats64 *storage);
1398 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1399 int (*ndo_get_offload_stats)(int attr_id,
1400 const struct net_device *dev,
1402 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1404 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1405 __be16 proto, u16 vid);
1406 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1407 __be16 proto, u16 vid);
1408 #ifdef CONFIG_NET_POLL_CONTROLLER
1409 void (*ndo_poll_controller)(struct net_device *dev);
1410 int (*ndo_netpoll_setup)(struct net_device *dev,
1411 struct netpoll_info *info);
1412 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1414 int (*ndo_set_vf_mac)(struct net_device *dev,
1415 int queue, u8 *mac);
1416 int (*ndo_set_vf_vlan)(struct net_device *dev,
1417 int queue, u16 vlan,
1418 u8 qos, __be16 proto);
1419 int (*ndo_set_vf_rate)(struct net_device *dev,
1420 int vf, int min_tx_rate,
1422 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1423 int vf, bool setting);
1424 int (*ndo_set_vf_trust)(struct net_device *dev,
1425 int vf, bool setting);
1426 int (*ndo_get_vf_config)(struct net_device *dev,
1428 struct ifla_vf_info *ivf);
1429 int (*ndo_set_vf_link_state)(struct net_device *dev,
1430 int vf, int link_state);
1431 int (*ndo_get_vf_stats)(struct net_device *dev,
1433 struct ifla_vf_stats
1435 int (*ndo_set_vf_port)(struct net_device *dev,
1437 struct nlattr *port[]);
1438 int (*ndo_get_vf_port)(struct net_device *dev,
1439 int vf, struct sk_buff *skb);
1440 int (*ndo_get_vf_guid)(struct net_device *dev,
1442 struct ifla_vf_guid *node_guid,
1443 struct ifla_vf_guid *port_guid);
1444 int (*ndo_set_vf_guid)(struct net_device *dev,
1447 int (*ndo_set_vf_rss_query_en)(
1448 struct net_device *dev,
1449 int vf, bool setting);
1450 int (*ndo_setup_tc)(struct net_device *dev,
1451 enum tc_setup_type type,
1453 #if IS_ENABLED(CONFIG_FCOE)
1454 int (*ndo_fcoe_enable)(struct net_device *dev);
1455 int (*ndo_fcoe_disable)(struct net_device *dev);
1456 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1458 struct scatterlist *sgl,
1460 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1462 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1464 struct scatterlist *sgl,
1466 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1467 struct netdev_fcoe_hbainfo *hbainfo);
1470 #if IS_ENABLED(CONFIG_LIBFCOE)
1471 #define NETDEV_FCOE_WWNN 0
1472 #define NETDEV_FCOE_WWPN 1
1473 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1474 u64 *wwn, int type);
1477 #ifdef CONFIG_RFS_ACCEL
1478 int (*ndo_rx_flow_steer)(struct net_device *dev,
1479 const struct sk_buff *skb,
1483 int (*ndo_add_slave)(struct net_device *dev,
1484 struct net_device *slave_dev,
1485 struct netlink_ext_ack *extack);
1486 int (*ndo_del_slave)(struct net_device *dev,
1487 struct net_device *slave_dev);
1488 struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev,
1489 struct sk_buff *skb,
1491 struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev,
1493 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1494 netdev_features_t features);
1495 int (*ndo_set_features)(struct net_device *dev,
1496 netdev_features_t features);
1497 int (*ndo_neigh_construct)(struct net_device *dev,
1498 struct neighbour *n);
1499 void (*ndo_neigh_destroy)(struct net_device *dev,
1500 struct neighbour *n);
1502 int (*ndo_fdb_add)(struct ndmsg *ndm,
1503 struct nlattr *tb[],
1504 struct net_device *dev,
1505 const unsigned char *addr,
1508 struct netlink_ext_ack *extack);
1509 int (*ndo_fdb_del)(struct ndmsg *ndm,
1510 struct nlattr *tb[],
1511 struct net_device *dev,
1512 const unsigned char *addr,
1514 int (*ndo_fdb_dump)(struct sk_buff *skb,
1515 struct netlink_callback *cb,
1516 struct net_device *dev,
1517 struct net_device *filter_dev,
1519 int (*ndo_fdb_get)(struct sk_buff *skb,
1520 struct nlattr *tb[],
1521 struct net_device *dev,
1522 const unsigned char *addr,
1523 u16 vid, u32 portid, u32 seq,
1524 struct netlink_ext_ack *extack);
1525 int (*ndo_bridge_setlink)(struct net_device *dev,
1526 struct nlmsghdr *nlh,
1528 struct netlink_ext_ack *extack);
1529 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1531 struct net_device *dev,
1534 int (*ndo_bridge_dellink)(struct net_device *dev,
1535 struct nlmsghdr *nlh,
1537 int (*ndo_change_carrier)(struct net_device *dev,
1539 int (*ndo_get_phys_port_id)(struct net_device *dev,
1540 struct netdev_phys_item_id *ppid);
1541 int (*ndo_get_port_parent_id)(struct net_device *dev,
1542 struct netdev_phys_item_id *ppid);
1543 int (*ndo_get_phys_port_name)(struct net_device *dev,
1544 char *name, size_t len);
1545 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1546 struct net_device *dev);
1547 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1550 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1553 int (*ndo_get_iflink)(const struct net_device *dev);
1554 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1555 struct sk_buff *skb);
1556 void (*ndo_set_rx_headroom)(struct net_device *dev,
1557 int needed_headroom);
1558 int (*ndo_bpf)(struct net_device *dev,
1559 struct netdev_bpf *bpf);
1560 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1561 struct xdp_frame **xdp,
1563 struct net_device * (*ndo_xdp_get_xmit_slave)(struct net_device *dev,
1564 struct xdp_buff *xdp);
1565 int (*ndo_xsk_wakeup)(struct net_device *dev,
1566 u32 queue_id, u32 flags);
1567 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1568 int (*ndo_tunnel_ctl)(struct net_device *dev,
1569 struct ip_tunnel_parm *p, int cmd);
1570 struct net_device * (*ndo_get_peer_dev)(struct net_device *dev);
1571 int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx,
1572 struct net_device_path *path);
1576 * enum netdev_priv_flags - &struct net_device priv_flags
1578 * These are the &struct net_device, they are only set internally
1579 * by drivers and used in the kernel. These flags are invisible to
1580 * userspace; this means that the order of these flags can change
1581 * during any kernel release.
1583 * You should have a pretty good reason to be extending these flags.
1585 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1586 * @IFF_EBRIDGE: Ethernet bridging device
1587 * @IFF_BONDING: bonding master or slave
1588 * @IFF_ISATAP: ISATAP interface (RFC4214)
1589 * @IFF_WAN_HDLC: WAN HDLC device
1590 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1592 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1593 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1594 * @IFF_MACVLAN_PORT: device used as macvlan port
1595 * @IFF_BRIDGE_PORT: device used as bridge port
1596 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1597 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1598 * @IFF_UNICAST_FLT: Supports unicast filtering
1599 * @IFF_TEAM_PORT: device used as team port
1600 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1601 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1602 * change when it's running
1603 * @IFF_MACVLAN: Macvlan device
1604 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1605 * underlying stacked devices
1606 * @IFF_L3MDEV_MASTER: device is an L3 master device
1607 * @IFF_NO_QUEUE: device can run without qdisc attached
1608 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1609 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1610 * @IFF_TEAM: device is a team device
1611 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1612 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1613 * entity (i.e. the master device for bridged veth)
1614 * @IFF_MACSEC: device is a MACsec device
1615 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1616 * @IFF_FAILOVER: device is a failover master device
1617 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1618 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1619 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1620 * @IFF_TX_SKB_NO_LINEAR: device/driver is capable of xmitting frames with
1621 * skb_headlen(skb) == 0 (data starts from frag0)
1622 * @IFF_CHANGE_PROTO_DOWN: device supports setting carrier via IFLA_PROTO_DOWN
1624 enum netdev_priv_flags {
1625 IFF_802_1Q_VLAN = 1<<0,
1629 IFF_WAN_HDLC = 1<<4,
1630 IFF_XMIT_DST_RELEASE = 1<<5,
1631 IFF_DONT_BRIDGE = 1<<6,
1632 IFF_DISABLE_NETPOLL = 1<<7,
1633 IFF_MACVLAN_PORT = 1<<8,
1634 IFF_BRIDGE_PORT = 1<<9,
1635 IFF_OVS_DATAPATH = 1<<10,
1636 IFF_TX_SKB_SHARING = 1<<11,
1637 IFF_UNICAST_FLT = 1<<12,
1638 IFF_TEAM_PORT = 1<<13,
1639 IFF_SUPP_NOFCS = 1<<14,
1640 IFF_LIVE_ADDR_CHANGE = 1<<15,
1641 IFF_MACVLAN = 1<<16,
1642 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1643 IFF_L3MDEV_MASTER = 1<<18,
1644 IFF_NO_QUEUE = 1<<19,
1645 IFF_OPENVSWITCH = 1<<20,
1646 IFF_L3MDEV_SLAVE = 1<<21,
1648 IFF_RXFH_CONFIGURED = 1<<23,
1649 IFF_PHONY_HEADROOM = 1<<24,
1651 IFF_NO_RX_HANDLER = 1<<26,
1652 IFF_FAILOVER = 1<<27,
1653 IFF_FAILOVER_SLAVE = 1<<28,
1654 IFF_L3MDEV_RX_HANDLER = 1<<29,
1655 IFF_LIVE_RENAME_OK = 1<<30,
1656 IFF_TX_SKB_NO_LINEAR = 1<<31,
1657 IFF_CHANGE_PROTO_DOWN = BIT_ULL(32),
1660 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1661 #define IFF_EBRIDGE IFF_EBRIDGE
1662 #define IFF_BONDING IFF_BONDING
1663 #define IFF_ISATAP IFF_ISATAP
1664 #define IFF_WAN_HDLC IFF_WAN_HDLC
1665 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1666 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1667 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1668 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1669 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1670 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1671 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1672 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1673 #define IFF_TEAM_PORT IFF_TEAM_PORT
1674 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1675 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1676 #define IFF_MACVLAN IFF_MACVLAN
1677 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1678 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1679 #define IFF_NO_QUEUE IFF_NO_QUEUE
1680 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1681 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1682 #define IFF_TEAM IFF_TEAM
1683 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1684 #define IFF_PHONY_HEADROOM IFF_PHONY_HEADROOM
1685 #define IFF_MACSEC IFF_MACSEC
1686 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1687 #define IFF_FAILOVER IFF_FAILOVER
1688 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1689 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1690 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1691 #define IFF_TX_SKB_NO_LINEAR IFF_TX_SKB_NO_LINEAR
1693 /* Specifies the type of the struct net_device::ml_priv pointer */
1694 enum netdev_ml_priv_type {
1700 * struct net_device - The DEVICE structure.
1702 * Actually, this whole structure is a big mistake. It mixes I/O
1703 * data with strictly "high-level" data, and it has to know about
1704 * almost every data structure used in the INET module.
1706 * @name: This is the first field of the "visible" part of this structure
1707 * (i.e. as seen by users in the "Space.c" file). It is the name
1710 * @name_node: Name hashlist node
1711 * @ifalias: SNMP alias
1712 * @mem_end: Shared memory end
1713 * @mem_start: Shared memory start
1714 * @base_addr: Device I/O address
1715 * @irq: Device IRQ number
1717 * @state: Generic network queuing layer state, see netdev_state_t
1718 * @dev_list: The global list of network devices
1719 * @napi_list: List entry used for polling NAPI devices
1720 * @unreg_list: List entry when we are unregistering the
1721 * device; see the function unregister_netdev
1722 * @close_list: List entry used when we are closing the device
1723 * @ptype_all: Device-specific packet handlers for all protocols
1724 * @ptype_specific: Device-specific, protocol-specific packet handlers
1726 * @adj_list: Directly linked devices, like slaves for bonding
1727 * @features: Currently active device features
1728 * @hw_features: User-changeable features
1730 * @wanted_features: User-requested features
1731 * @vlan_features: Mask of features inheritable by VLAN devices
1733 * @hw_enc_features: Mask of features inherited by encapsulating devices
1734 * This field indicates what encapsulation
1735 * offloads the hardware is capable of doing,
1736 * and drivers will need to set them appropriately.
1738 * @mpls_features: Mask of features inheritable by MPLS
1739 * @gso_partial_features: value(s) from NETIF_F_GSO\*
1741 * @ifindex: interface index
1742 * @group: The group the device belongs to
1744 * @stats: Statistics struct, which was left as a legacy, use
1745 * rtnl_link_stats64 instead
1747 * @core_stats: core networking counters,
1748 * do not use this in drivers
1749 * @carrier_up_count: Number of times the carrier has been up
1750 * @carrier_down_count: Number of times the carrier has been down
1752 * @wireless_handlers: List of functions to handle Wireless Extensions,
1754 * see <net/iw_handler.h> for details.
1755 * @wireless_data: Instance data managed by the core of wireless extensions
1757 * @netdev_ops: Includes several pointers to callbacks,
1758 * if one wants to override the ndo_*() functions
1759 * @ethtool_ops: Management operations
1760 * @l3mdev_ops: Layer 3 master device operations
1761 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1762 * discovery handling. Necessary for e.g. 6LoWPAN.
1763 * @xfrmdev_ops: Transformation offload operations
1764 * @tlsdev_ops: Transport Layer Security offload operations
1765 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1766 * of Layer 2 headers.
1768 * @flags: Interface flags (a la BSD)
1769 * @priv_flags: Like 'flags' but invisible to userspace,
1770 * see if.h for the definitions
1771 * @gflags: Global flags ( kept as legacy )
1772 * @padded: How much padding added by alloc_netdev()
1773 * @operstate: RFC2863 operstate
1774 * @link_mode: Mapping policy to operstate
1775 * @if_port: Selectable AUI, TP, ...
1777 * @mtu: Interface MTU value
1778 * @min_mtu: Interface Minimum MTU value
1779 * @max_mtu: Interface Maximum MTU value
1780 * @type: Interface hardware type
1781 * @hard_header_len: Maximum hardware header length.
1782 * @min_header_len: Minimum hardware header length
1784 * @needed_headroom: Extra headroom the hardware may need, but not in all
1785 * cases can this be guaranteed
1786 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1787 * cases can this be guaranteed. Some cases also use
1788 * LL_MAX_HEADER instead to allocate the skb
1790 * interface address info:
1792 * @perm_addr: Permanent hw address
1793 * @addr_assign_type: Hw address assignment type
1794 * @addr_len: Hardware address length
1795 * @upper_level: Maximum depth level of upper devices.
1796 * @lower_level: Maximum depth level of lower devices.
1797 * @neigh_priv_len: Used in neigh_alloc()
1798 * @dev_id: Used to differentiate devices that share
1799 * the same link layer address
1800 * @dev_port: Used to differentiate devices that share
1802 * @addr_list_lock: XXX: need comments on this one
1803 * @name_assign_type: network interface name assignment type
1804 * @uc_promisc: Counter that indicates promiscuous mode
1805 * has been enabled due to the need to listen to
1806 * additional unicast addresses in a device that
1807 * does not implement ndo_set_rx_mode()
1808 * @uc: unicast mac addresses
1809 * @mc: multicast mac addresses
1810 * @dev_addrs: list of device hw addresses
1811 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1812 * @promiscuity: Number of times the NIC is told to work in
1813 * promiscuous mode; if it becomes 0 the NIC will
1814 * exit promiscuous mode
1815 * @allmulti: Counter, enables or disables allmulticast mode
1817 * @vlan_info: VLAN info
1818 * @dsa_ptr: dsa specific data
1819 * @tipc_ptr: TIPC specific data
1820 * @atalk_ptr: AppleTalk link
1821 * @ip_ptr: IPv4 specific data
1822 * @dn_ptr: DECnet specific data
1823 * @ip6_ptr: IPv6 specific data
1824 * @ax25_ptr: AX.25 specific data
1825 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1826 * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network
1828 * @mpls_ptr: mpls_dev struct pointer
1829 * @mctp_ptr: MCTP specific data
1831 * @dev_addr: Hw address (before bcast,
1832 * because most packets are unicast)
1834 * @_rx: Array of RX queues
1835 * @num_rx_queues: Number of RX queues
1836 * allocated at register_netdev() time
1837 * @real_num_rx_queues: Number of RX queues currently active in device
1838 * @xdp_prog: XDP sockets filter program pointer
1839 * @gro_flush_timeout: timeout for GRO layer in NAPI
1840 * @napi_defer_hard_irqs: If not zero, provides a counter that would
1841 * allow to avoid NIC hard IRQ, on busy queues.
1843 * @rx_handler: handler for received packets
1844 * @rx_handler_data: XXX: need comments on this one
1845 * @miniq_ingress: ingress/clsact qdisc specific data for
1846 * ingress processing
1847 * @ingress_queue: XXX: need comments on this one
1848 * @nf_hooks_ingress: netfilter hooks executed for ingress packets
1849 * @broadcast: hw bcast address
1851 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1852 * indexed by RX queue number. Assigned by driver.
1853 * This must only be set if the ndo_rx_flow_steer
1854 * operation is defined
1855 * @index_hlist: Device index hash chain
1857 * @_tx: Array of TX queues
1858 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1859 * @real_num_tx_queues: Number of TX queues currently active in device
1860 * @qdisc: Root qdisc from userspace point of view
1861 * @tx_queue_len: Max frames per queue allowed
1862 * @tx_global_lock: XXX: need comments on this one
1863 * @xdp_bulkq: XDP device bulk queue
1864 * @xps_maps: all CPUs/RXQs maps for XPS device
1866 * @xps_maps: XXX: need comments on this one
1867 * @miniq_egress: clsact qdisc specific data for
1869 * @nf_hooks_egress: netfilter hooks executed for egress packets
1870 * @qdisc_hash: qdisc hash table
1871 * @watchdog_timeo: Represents the timeout that is used by
1872 * the watchdog (see dev_watchdog())
1873 * @watchdog_timer: List of timers
1875 * @proto_down_reason: reason a netdev interface is held down
1876 * @pcpu_refcnt: Number of references to this device
1877 * @dev_refcnt: Number of references to this device
1878 * @refcnt_tracker: Tracker directory for tracked references to this device
1879 * @todo_list: Delayed register/unregister
1880 * @link_watch_list: XXX: need comments on this one
1882 * @reg_state: Register/unregister state machine
1883 * @dismantle: Device is going to be freed
1884 * @rtnl_link_state: This enum represents the phases of creating
1887 * @needs_free_netdev: Should unregister perform free_netdev?
1888 * @priv_destructor: Called from unregister
1889 * @npinfo: XXX: need comments on this one
1890 * @nd_net: Network namespace this network device is inside
1892 * @ml_priv: Mid-layer private
1893 * @ml_priv_type: Mid-layer private type
1894 * @lstats: Loopback statistics
1895 * @tstats: Tunnel statistics
1896 * @dstats: Dummy statistics
1897 * @vstats: Virtual ethernet statistics
1902 * @dm_private: Drop monitor private
1904 * @dev: Class/net/name entry
1905 * @sysfs_groups: Space for optional device, statistics and wireless
1908 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1909 * @rtnl_link_ops: Rtnl_link_ops
1911 * @gso_max_size: Maximum size of generic segmentation offload
1912 * @gso_max_segs: Maximum number of segments that can be passed to the
1915 * @dcbnl_ops: Data Center Bridging netlink ops
1916 * @num_tc: Number of traffic classes in the net device
1917 * @tc_to_txq: XXX: need comments on this one
1918 * @prio_tc_map: XXX: need comments on this one
1920 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1922 * @priomap: XXX: need comments on this one
1923 * @phydev: Physical device may attach itself
1924 * for hardware timestamping
1925 * @sfp_bus: attached &struct sfp_bus structure.
1927 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1929 * @proto_down: protocol port state information can be sent to the
1930 * switch driver and used to set the phys state of the
1933 * @wol_enabled: Wake-on-LAN is enabled
1935 * @threaded: napi threaded mode is enabled
1937 * @net_notifier_list: List of per-net netdev notifier block
1938 * that follow this device when it is moved
1939 * to another network namespace.
1941 * @macsec_ops: MACsec offloading ops
1943 * @udp_tunnel_nic_info: static structure describing the UDP tunnel
1944 * offload capabilities of the device
1945 * @udp_tunnel_nic: UDP tunnel offload state
1946 * @xdp_state: stores info on attached XDP BPF programs
1948 * @nested_level: Used as a parameter of spin_lock_nested() of
1949 * dev->addr_list_lock.
1950 * @unlink_list: As netif_addr_lock() can be called recursively,
1951 * keep a list of interfaces to be deleted.
1952 * @gro_max_size: Maximum size of aggregated packet in generic
1953 * receive offload (GRO)
1955 * @dev_addr_shadow: Copy of @dev_addr to catch direct writes.
1956 * @linkwatch_dev_tracker: refcount tracker used by linkwatch.
1957 * @watchdog_dev_tracker: refcount tracker used by watchdog.
1958 * @dev_registered_tracker: tracker for reference held while
1960 * @offload_xstats_l3: L3 HW stats for this netdevice.
1962 * FIXME: cleanup struct net_device such that network protocol info
1967 char name[IFNAMSIZ];
1968 struct netdev_name_node *name_node;
1969 struct dev_ifalias __rcu *ifalias;
1971 * I/O specific fields
1972 * FIXME: Merge these and struct ifmap into one
1974 unsigned long mem_end;
1975 unsigned long mem_start;
1976 unsigned long base_addr;
1979 * Some hardware also needs these fields (state,dev_list,
1980 * napi_list,unreg_list,close_list) but they are not
1981 * part of the usual set specified in Space.c.
1984 unsigned long state;
1986 struct list_head dev_list;
1987 struct list_head napi_list;
1988 struct list_head unreg_list;
1989 struct list_head close_list;
1990 struct list_head ptype_all;
1991 struct list_head ptype_specific;
1994 struct list_head upper;
1995 struct list_head lower;
1998 /* Read-mostly cache-line for fast-path access */
2000 unsigned long long priv_flags;
2001 const struct net_device_ops *netdev_ops;
2003 unsigned short gflags;
2004 unsigned short hard_header_len;
2006 /* Note : dev->mtu is often read without holding a lock.
2007 * Writers usually hold RTNL.
2008 * It is recommended to use READ_ONCE() to annotate the reads,
2009 * and to use WRITE_ONCE() to annotate the writes.
2012 unsigned short needed_headroom;
2013 unsigned short needed_tailroom;
2015 netdev_features_t features;
2016 netdev_features_t hw_features;
2017 netdev_features_t wanted_features;
2018 netdev_features_t vlan_features;
2019 netdev_features_t hw_enc_features;
2020 netdev_features_t mpls_features;
2021 netdev_features_t gso_partial_features;
2023 unsigned int min_mtu;
2024 unsigned int max_mtu;
2025 unsigned short type;
2026 unsigned char min_header_len;
2027 unsigned char name_assign_type;
2031 struct net_device_stats stats; /* not used by modern drivers */
2033 struct net_device_core_stats __percpu *core_stats;
2035 /* Stats to monitor link on/off, flapping */
2036 atomic_t carrier_up_count;
2037 atomic_t carrier_down_count;
2039 #ifdef CONFIG_WIRELESS_EXT
2040 const struct iw_handler_def *wireless_handlers;
2041 struct iw_public_data *wireless_data;
2043 const struct ethtool_ops *ethtool_ops;
2044 #ifdef CONFIG_NET_L3_MASTER_DEV
2045 const struct l3mdev_ops *l3mdev_ops;
2047 #if IS_ENABLED(CONFIG_IPV6)
2048 const struct ndisc_ops *ndisc_ops;
2051 #ifdef CONFIG_XFRM_OFFLOAD
2052 const struct xfrmdev_ops *xfrmdev_ops;
2055 #if IS_ENABLED(CONFIG_TLS_DEVICE)
2056 const struct tlsdev_ops *tlsdev_ops;
2059 const struct header_ops *header_ops;
2061 unsigned char operstate;
2062 unsigned char link_mode;
2064 unsigned char if_port;
2067 /* Interface address info. */
2068 unsigned char perm_addr[MAX_ADDR_LEN];
2069 unsigned char addr_assign_type;
2070 unsigned char addr_len;
2071 unsigned char upper_level;
2072 unsigned char lower_level;
2074 unsigned short neigh_priv_len;
2075 unsigned short dev_id;
2076 unsigned short dev_port;
2077 unsigned short padded;
2079 spinlock_t addr_list_lock;
2082 struct netdev_hw_addr_list uc;
2083 struct netdev_hw_addr_list mc;
2084 struct netdev_hw_addr_list dev_addrs;
2087 struct kset *queues_kset;
2089 #ifdef CONFIG_LOCKDEP
2090 struct list_head unlink_list;
2092 unsigned int promiscuity;
2093 unsigned int allmulti;
2095 #ifdef CONFIG_LOCKDEP
2096 unsigned char nested_level;
2100 /* Protocol-specific pointers */
2102 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2103 struct vlan_info __rcu *vlan_info;
2105 #if IS_ENABLED(CONFIG_NET_DSA)
2106 struct dsa_port *dsa_ptr;
2108 #if IS_ENABLED(CONFIG_TIPC)
2109 struct tipc_bearer __rcu *tipc_ptr;
2111 #if IS_ENABLED(CONFIG_ATALK)
2114 struct in_device __rcu *ip_ptr;
2115 #if IS_ENABLED(CONFIG_DECNET)
2116 struct dn_dev __rcu *dn_ptr;
2118 struct inet6_dev __rcu *ip6_ptr;
2119 #if IS_ENABLED(CONFIG_AX25)
2122 struct wireless_dev *ieee80211_ptr;
2123 struct wpan_dev *ieee802154_ptr;
2124 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
2125 struct mpls_dev __rcu *mpls_ptr;
2127 #if IS_ENABLED(CONFIG_MCTP)
2128 struct mctp_dev __rcu *mctp_ptr;
2132 * Cache lines mostly used on receive path (including eth_type_trans())
2134 /* Interface address info used in eth_type_trans() */
2135 const unsigned char *dev_addr;
2137 struct netdev_rx_queue *_rx;
2138 unsigned int num_rx_queues;
2139 unsigned int real_num_rx_queues;
2141 struct bpf_prog __rcu *xdp_prog;
2142 unsigned long gro_flush_timeout;
2143 int napi_defer_hard_irqs;
2144 #define GRO_MAX_SIZE 65536
2145 unsigned int gro_max_size;
2146 rx_handler_func_t __rcu *rx_handler;
2147 void __rcu *rx_handler_data;
2149 #ifdef CONFIG_NET_CLS_ACT
2150 struct mini_Qdisc __rcu *miniq_ingress;
2152 struct netdev_queue __rcu *ingress_queue;
2153 #ifdef CONFIG_NETFILTER_INGRESS
2154 struct nf_hook_entries __rcu *nf_hooks_ingress;
2157 unsigned char broadcast[MAX_ADDR_LEN];
2158 #ifdef CONFIG_RFS_ACCEL
2159 struct cpu_rmap *rx_cpu_rmap;
2161 struct hlist_node index_hlist;
2164 * Cache lines mostly used on transmit path
2166 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
2167 unsigned int num_tx_queues;
2168 unsigned int real_num_tx_queues;
2169 struct Qdisc __rcu *qdisc;
2170 unsigned int tx_queue_len;
2171 spinlock_t tx_global_lock;
2173 struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
2176 struct xps_dev_maps __rcu *xps_maps[XPS_MAPS_MAX];
2178 #ifdef CONFIG_NET_CLS_ACT
2179 struct mini_Qdisc __rcu *miniq_egress;
2181 #ifdef CONFIG_NETFILTER_EGRESS
2182 struct nf_hook_entries __rcu *nf_hooks_egress;
2185 #ifdef CONFIG_NET_SCHED
2186 DECLARE_HASHTABLE (qdisc_hash, 4);
2188 /* These may be needed for future network-power-down code. */
2189 struct timer_list watchdog_timer;
2192 u32 proto_down_reason;
2194 struct list_head todo_list;
2196 #ifdef CONFIG_PCPU_DEV_REFCNT
2197 int __percpu *pcpu_refcnt;
2199 refcount_t dev_refcnt;
2201 struct ref_tracker_dir refcnt_tracker;
2203 struct list_head link_watch_list;
2205 enum { NETREG_UNINITIALIZED=0,
2206 NETREG_REGISTERED, /* completed register_netdevice */
2207 NETREG_UNREGISTERING, /* called unregister_netdevice */
2208 NETREG_UNREGISTERED, /* completed unregister todo */
2209 NETREG_RELEASED, /* called free_netdev */
2210 NETREG_DUMMY, /* dummy device for NAPI poll */
2216 RTNL_LINK_INITIALIZED,
2217 RTNL_LINK_INITIALIZING,
2218 } rtnl_link_state:16;
2220 bool needs_free_netdev;
2221 void (*priv_destructor)(struct net_device *dev);
2223 #ifdef CONFIG_NETPOLL
2224 struct netpoll_info __rcu *npinfo;
2227 possible_net_t nd_net;
2229 /* mid-layer private */
2231 enum netdev_ml_priv_type ml_priv_type;
2234 struct pcpu_lstats __percpu *lstats;
2235 struct pcpu_sw_netstats __percpu *tstats;
2236 struct pcpu_dstats __percpu *dstats;
2239 #if IS_ENABLED(CONFIG_GARP)
2240 struct garp_port __rcu *garp_port;
2242 #if IS_ENABLED(CONFIG_MRP)
2243 struct mrp_port __rcu *mrp_port;
2245 #if IS_ENABLED(CONFIG_NET_DROP_MONITOR)
2246 struct dm_hw_stat_delta __rcu *dm_private;
2249 const struct attribute_group *sysfs_groups[4];
2250 const struct attribute_group *sysfs_rx_queue_group;
2252 const struct rtnl_link_ops *rtnl_link_ops;
2254 /* for setting kernel sock attribute on TCP connection setup */
2255 #define GSO_MAX_SIZE 65536
2256 unsigned int gso_max_size;
2257 #define GSO_MAX_SEGS 65535
2261 const struct dcbnl_rtnl_ops *dcbnl_ops;
2264 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2265 u8 prio_tc_map[TC_BITMASK + 1];
2267 #if IS_ENABLED(CONFIG_FCOE)
2268 unsigned int fcoe_ddp_xid;
2270 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2271 struct netprio_map __rcu *priomap;
2273 struct phy_device *phydev;
2274 struct sfp_bus *sfp_bus;
2275 struct lock_class_key *qdisc_tx_busylock;
2277 unsigned wol_enabled:1;
2278 unsigned threaded:1;
2280 struct list_head net_notifier_list;
2282 #if IS_ENABLED(CONFIG_MACSEC)
2283 /* MACsec management functions */
2284 const struct macsec_ops *macsec_ops;
2286 const struct udp_tunnel_nic_info *udp_tunnel_nic_info;
2287 struct udp_tunnel_nic *udp_tunnel_nic;
2289 /* protected by rtnl_lock */
2290 struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE];
2292 u8 dev_addr_shadow[MAX_ADDR_LEN];
2293 netdevice_tracker linkwatch_dev_tracker;
2294 netdevice_tracker watchdog_dev_tracker;
2295 netdevice_tracker dev_registered_tracker;
2296 struct rtnl_hw_stats64 *offload_xstats_l3;
2298 #define to_net_dev(d) container_of(d, struct net_device, dev)
2300 static inline bool netif_elide_gro(const struct net_device *dev)
2302 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2307 #define NETDEV_ALIGN 32
2310 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2312 return dev->prio_tc_map[prio & TC_BITMASK];
2316 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2318 if (tc >= dev->num_tc)
2321 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2325 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2326 void netdev_reset_tc(struct net_device *dev);
2327 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2328 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2331 int netdev_get_num_tc(struct net_device *dev)
2336 static inline void net_prefetch(void *p)
2339 #if L1_CACHE_BYTES < 128
2340 prefetch((u8 *)p + L1_CACHE_BYTES);
2344 static inline void net_prefetchw(void *p)
2347 #if L1_CACHE_BYTES < 128
2348 prefetchw((u8 *)p + L1_CACHE_BYTES);
2352 void netdev_unbind_sb_channel(struct net_device *dev,
2353 struct net_device *sb_dev);
2354 int netdev_bind_sb_channel_queue(struct net_device *dev,
2355 struct net_device *sb_dev,
2356 u8 tc, u16 count, u16 offset);
2357 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2358 static inline int netdev_get_sb_channel(struct net_device *dev)
2360 return max_t(int, -dev->num_tc, 0);
2364 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2367 return &dev->_tx[index];
2370 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2371 const struct sk_buff *skb)
2373 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2376 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2377 void (*f)(struct net_device *,
2378 struct netdev_queue *,
2384 for (i = 0; i < dev->num_tx_queues; i++)
2385 f(dev, &dev->_tx[i], arg);
2388 #define netdev_lockdep_set_classes(dev) \
2390 static struct lock_class_key qdisc_tx_busylock_key; \
2391 static struct lock_class_key qdisc_xmit_lock_key; \
2392 static struct lock_class_key dev_addr_list_lock_key; \
2395 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2396 lockdep_set_class(&(dev)->addr_list_lock, \
2397 &dev_addr_list_lock_key); \
2398 for (i = 0; i < (dev)->num_tx_queues; i++) \
2399 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2400 &qdisc_xmit_lock_key); \
2403 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2404 struct net_device *sb_dev);
2405 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2406 struct sk_buff *skb,
2407 struct net_device *sb_dev);
2409 /* returns the headroom that the master device needs to take in account
2410 * when forwarding to this dev
2412 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2414 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2417 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2419 if (dev->netdev_ops->ndo_set_rx_headroom)
2420 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2423 /* set the device rx headroom to the dev's default */
2424 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2426 netdev_set_rx_headroom(dev, -1);
2429 static inline void *netdev_get_ml_priv(struct net_device *dev,
2430 enum netdev_ml_priv_type type)
2432 if (dev->ml_priv_type != type)
2435 return dev->ml_priv;
2438 static inline void netdev_set_ml_priv(struct net_device *dev,
2440 enum netdev_ml_priv_type type)
2442 WARN(dev->ml_priv_type && dev->ml_priv_type != type,
2443 "Overwriting already set ml_priv_type (%u) with different ml_priv_type (%u)!\n",
2444 dev->ml_priv_type, type);
2445 WARN(!dev->ml_priv_type && dev->ml_priv,
2446 "Overwriting already set ml_priv and ml_priv_type is ML_PRIV_NONE!\n");
2448 dev->ml_priv = ml_priv;
2449 dev->ml_priv_type = type;
2453 * Net namespace inlines
2456 struct net *dev_net(const struct net_device *dev)
2458 return read_pnet(&dev->nd_net);
2462 void dev_net_set(struct net_device *dev, struct net *net)
2464 write_pnet(&dev->nd_net, net);
2468 * netdev_priv - access network device private data
2469 * @dev: network device
2471 * Get network device private data
2473 static inline void *netdev_priv(const struct net_device *dev)
2475 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2478 /* Set the sysfs physical device reference for the network logical device
2479 * if set prior to registration will cause a symlink during initialization.
2481 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2483 /* Set the sysfs device type for the network logical device to allow
2484 * fine-grained identification of different network device types. For
2485 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2487 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2489 /* Default NAPI poll() weight
2490 * Device drivers are strongly advised to not use bigger value
2492 #define NAPI_POLL_WEIGHT 64
2495 * netif_napi_add - initialize a NAPI context
2496 * @dev: network device
2497 * @napi: NAPI context
2498 * @poll: polling function
2499 * @weight: default weight
2501 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2502 * *any* of the other NAPI-related functions.
2504 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2505 int (*poll)(struct napi_struct *, int), int weight);
2508 * netif_tx_napi_add - initialize a NAPI context
2509 * @dev: network device
2510 * @napi: NAPI context
2511 * @poll: polling function
2512 * @weight: default weight
2514 * This variant of netif_napi_add() should be used from drivers using NAPI
2515 * to exclusively poll a TX queue.
2516 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2518 static inline void netif_tx_napi_add(struct net_device *dev,
2519 struct napi_struct *napi,
2520 int (*poll)(struct napi_struct *, int),
2523 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2524 netif_napi_add(dev, napi, poll, weight);
2528 * __netif_napi_del - remove a NAPI context
2529 * @napi: NAPI context
2531 * Warning: caller must observe RCU grace period before freeing memory
2532 * containing @napi. Drivers might want to call this helper to combine
2533 * all the needed RCU grace periods into a single one.
2535 void __netif_napi_del(struct napi_struct *napi);
2538 * netif_napi_del - remove a NAPI context
2539 * @napi: NAPI context
2541 * netif_napi_del() removes a NAPI context from the network device NAPI list
2543 static inline void netif_napi_del(struct napi_struct *napi)
2545 __netif_napi_del(napi);
2549 struct packet_type {
2550 __be16 type; /* This is really htons(ether_type). */
2551 bool ignore_outgoing;
2552 struct net_device *dev; /* NULL is wildcarded here */
2553 netdevice_tracker dev_tracker;
2554 int (*func) (struct sk_buff *,
2555 struct net_device *,
2556 struct packet_type *,
2557 struct net_device *);
2558 void (*list_func) (struct list_head *,
2559 struct packet_type *,
2560 struct net_device *);
2561 bool (*id_match)(struct packet_type *ptype,
2563 struct net *af_packet_net;
2564 void *af_packet_priv;
2565 struct list_head list;
2568 struct offload_callbacks {
2569 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2570 netdev_features_t features);
2571 struct sk_buff *(*gro_receive)(struct list_head *head,
2572 struct sk_buff *skb);
2573 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2576 struct packet_offload {
2577 __be16 type; /* This is really htons(ether_type). */
2579 struct offload_callbacks callbacks;
2580 struct list_head list;
2583 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2584 struct pcpu_sw_netstats {
2589 struct u64_stats_sync syncp;
2590 } __aligned(4 * sizeof(u64));
2592 struct pcpu_lstats {
2593 u64_stats_t packets;
2595 struct u64_stats_sync syncp;
2596 } __aligned(2 * sizeof(u64));
2598 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2600 static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len)
2602 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
2604 u64_stats_update_begin(&tstats->syncp);
2605 tstats->rx_bytes += len;
2606 tstats->rx_packets++;
2607 u64_stats_update_end(&tstats->syncp);
2610 static inline void dev_sw_netstats_tx_add(struct net_device *dev,
2611 unsigned int packets,
2614 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
2616 u64_stats_update_begin(&tstats->syncp);
2617 tstats->tx_bytes += len;
2618 tstats->tx_packets += packets;
2619 u64_stats_update_end(&tstats->syncp);
2622 static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2624 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2626 u64_stats_update_begin(&lstats->syncp);
2627 u64_stats_add(&lstats->bytes, len);
2628 u64_stats_inc(&lstats->packets);
2629 u64_stats_update_end(&lstats->syncp);
2632 #define __netdev_alloc_pcpu_stats(type, gfp) \
2634 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2637 for_each_possible_cpu(__cpu) { \
2638 typeof(type) *stat; \
2639 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2640 u64_stats_init(&stat->syncp); \
2646 #define netdev_alloc_pcpu_stats(type) \
2647 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2649 #define devm_netdev_alloc_pcpu_stats(dev, type) \
2651 typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\
2654 for_each_possible_cpu(__cpu) { \
2655 typeof(type) *stat; \
2656 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2657 u64_stats_init(&stat->syncp); \
2663 enum netdev_lag_tx_type {
2664 NETDEV_LAG_TX_TYPE_UNKNOWN,
2665 NETDEV_LAG_TX_TYPE_RANDOM,
2666 NETDEV_LAG_TX_TYPE_BROADCAST,
2667 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2668 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2669 NETDEV_LAG_TX_TYPE_HASH,
2672 enum netdev_lag_hash {
2673 NETDEV_LAG_HASH_NONE,
2675 NETDEV_LAG_HASH_L34,
2676 NETDEV_LAG_HASH_L23,
2677 NETDEV_LAG_HASH_E23,
2678 NETDEV_LAG_HASH_E34,
2679 NETDEV_LAG_HASH_VLAN_SRCMAC,
2680 NETDEV_LAG_HASH_UNKNOWN,
2683 struct netdev_lag_upper_info {
2684 enum netdev_lag_tx_type tx_type;
2685 enum netdev_lag_hash hash_type;
2688 struct netdev_lag_lower_state_info {
2693 #include <linux/notifier.h>
2695 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2696 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2700 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2702 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2703 detected a hardware crash and restarted
2704 - we can use this eg to kick tcp sessions
2706 NETDEV_CHANGE, /* Notify device state change */
2709 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2710 NETDEV_CHANGEADDR, /* notify after the address change */
2711 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2715 NETDEV_BONDING_FAILOVER,
2717 NETDEV_PRE_TYPE_CHANGE,
2718 NETDEV_POST_TYPE_CHANGE,
2721 NETDEV_NOTIFY_PEERS,
2725 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2726 NETDEV_CHANGEINFODATA,
2727 NETDEV_BONDING_INFO,
2728 NETDEV_PRECHANGEUPPER,
2729 NETDEV_CHANGELOWERSTATE,
2730 NETDEV_UDP_TUNNEL_PUSH_INFO,
2731 NETDEV_UDP_TUNNEL_DROP_INFO,
2732 NETDEV_CHANGE_TX_QUEUE_LEN,
2733 NETDEV_CVLAN_FILTER_PUSH_INFO,
2734 NETDEV_CVLAN_FILTER_DROP_INFO,
2735 NETDEV_SVLAN_FILTER_PUSH_INFO,
2736 NETDEV_SVLAN_FILTER_DROP_INFO,
2737 NETDEV_OFFLOAD_XSTATS_ENABLE,
2738 NETDEV_OFFLOAD_XSTATS_DISABLE,
2739 NETDEV_OFFLOAD_XSTATS_REPORT_USED,
2740 NETDEV_OFFLOAD_XSTATS_REPORT_DELTA,
2742 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2744 int register_netdevice_notifier(struct notifier_block *nb);
2745 int unregister_netdevice_notifier(struct notifier_block *nb);
2746 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2747 int unregister_netdevice_notifier_net(struct net *net,
2748 struct notifier_block *nb);
2749 int register_netdevice_notifier_dev_net(struct net_device *dev,
2750 struct notifier_block *nb,
2751 struct netdev_net_notifier *nn);
2752 int unregister_netdevice_notifier_dev_net(struct net_device *dev,
2753 struct notifier_block *nb,
2754 struct netdev_net_notifier *nn);
2756 struct netdev_notifier_info {
2757 struct net_device *dev;
2758 struct netlink_ext_ack *extack;
2761 struct netdev_notifier_info_ext {
2762 struct netdev_notifier_info info; /* must be first */
2768 struct netdev_notifier_change_info {
2769 struct netdev_notifier_info info; /* must be first */
2770 unsigned int flags_changed;
2773 struct netdev_notifier_changeupper_info {
2774 struct netdev_notifier_info info; /* must be first */
2775 struct net_device *upper_dev; /* new upper dev */
2776 bool master; /* is upper dev master */
2777 bool linking; /* is the notification for link or unlink */
2778 void *upper_info; /* upper dev info */
2781 struct netdev_notifier_changelowerstate_info {
2782 struct netdev_notifier_info info; /* must be first */
2783 void *lower_state_info; /* is lower dev state */
2786 struct netdev_notifier_pre_changeaddr_info {
2787 struct netdev_notifier_info info; /* must be first */
2788 const unsigned char *dev_addr;
2791 enum netdev_offload_xstats_type {
2792 NETDEV_OFFLOAD_XSTATS_TYPE_L3 = 1,
2795 struct netdev_notifier_offload_xstats_info {
2796 struct netdev_notifier_info info; /* must be first */
2797 enum netdev_offload_xstats_type type;
2800 /* NETDEV_OFFLOAD_XSTATS_REPORT_DELTA */
2801 struct netdev_notifier_offload_xstats_rd *report_delta;
2802 /* NETDEV_OFFLOAD_XSTATS_REPORT_USED */
2803 struct netdev_notifier_offload_xstats_ru *report_used;
2807 int netdev_offload_xstats_enable(struct net_device *dev,
2808 enum netdev_offload_xstats_type type,
2809 struct netlink_ext_ack *extack);
2810 int netdev_offload_xstats_disable(struct net_device *dev,
2811 enum netdev_offload_xstats_type type);
2812 bool netdev_offload_xstats_enabled(const struct net_device *dev,
2813 enum netdev_offload_xstats_type type);
2814 int netdev_offload_xstats_get(struct net_device *dev,
2815 enum netdev_offload_xstats_type type,
2816 struct rtnl_hw_stats64 *stats, bool *used,
2817 struct netlink_ext_ack *extack);
2819 netdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *rd,
2820 const struct rtnl_hw_stats64 *stats);
2822 netdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *ru);
2823 void netdev_offload_xstats_push_delta(struct net_device *dev,
2824 enum netdev_offload_xstats_type type,
2825 const struct rtnl_hw_stats64 *stats);
2827 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2828 struct net_device *dev)
2831 info->extack = NULL;
2834 static inline struct net_device *
2835 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2840 static inline struct netlink_ext_ack *
2841 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2843 return info->extack;
2846 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2849 extern rwlock_t dev_base_lock; /* Device list lock */
2851 #define for_each_netdev(net, d) \
2852 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2853 #define for_each_netdev_reverse(net, d) \
2854 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2855 #define for_each_netdev_rcu(net, d) \
2856 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2857 #define for_each_netdev_safe(net, d, n) \
2858 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2859 #define for_each_netdev_continue(net, d) \
2860 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2861 #define for_each_netdev_continue_reverse(net, d) \
2862 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2864 #define for_each_netdev_continue_rcu(net, d) \
2865 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2866 #define for_each_netdev_in_bond_rcu(bond, slave) \
2867 for_each_netdev_rcu(&init_net, slave) \
2868 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2869 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2871 static inline struct net_device *next_net_device(struct net_device *dev)
2873 struct list_head *lh;
2877 lh = dev->dev_list.next;
2878 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2881 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2883 struct list_head *lh;
2887 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2888 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2891 static inline struct net_device *first_net_device(struct net *net)
2893 return list_empty(&net->dev_base_head) ? NULL :
2894 net_device_entry(net->dev_base_head.next);
2897 static inline struct net_device *first_net_device_rcu(struct net *net)
2899 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2901 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2904 int netdev_boot_setup_check(struct net_device *dev);
2905 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2906 const char *hwaddr);
2907 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2908 void dev_add_pack(struct packet_type *pt);
2909 void dev_remove_pack(struct packet_type *pt);
2910 void __dev_remove_pack(struct packet_type *pt);
2911 void dev_add_offload(struct packet_offload *po);
2912 void dev_remove_offload(struct packet_offload *po);
2914 int dev_get_iflink(const struct net_device *dev);
2915 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2916 int dev_fill_forward_path(const struct net_device *dev, const u8 *daddr,
2917 struct net_device_path_stack *stack);
2918 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2919 unsigned short mask);
2920 struct net_device *dev_get_by_name(struct net *net, const char *name);
2921 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2922 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2923 bool netdev_name_in_use(struct net *net, const char *name);
2924 int dev_alloc_name(struct net_device *dev, const char *name);
2925 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2926 void dev_close(struct net_device *dev);
2927 void dev_close_many(struct list_head *head, bool unlink);
2928 void dev_disable_lro(struct net_device *dev);
2929 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2930 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2931 struct net_device *sb_dev);
2932 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2933 struct net_device *sb_dev);
2935 int dev_queue_xmit(struct sk_buff *skb);
2936 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2937 int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2939 static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
2943 ret = __dev_direct_xmit(skb, queue_id);
2944 if (!dev_xmit_complete(ret))
2949 int register_netdevice(struct net_device *dev);
2950 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2951 void unregister_netdevice_many(struct list_head *head);
2952 static inline void unregister_netdevice(struct net_device *dev)
2954 unregister_netdevice_queue(dev, NULL);
2957 int netdev_refcnt_read(const struct net_device *dev);
2958 void free_netdev(struct net_device *dev);
2959 void netdev_freemem(struct net_device *dev);
2960 int init_dummy_netdev(struct net_device *dev);
2962 struct net_device *netdev_get_xmit_slave(struct net_device *dev,
2963 struct sk_buff *skb,
2965 struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev,
2967 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2968 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2969 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2970 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2971 int netdev_get_name(struct net *net, char *name, int ifindex);
2972 int dev_restart(struct net_device *dev);
2975 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2976 unsigned short type,
2977 const void *daddr, const void *saddr,
2980 if (!dev->header_ops || !dev->header_ops->create)
2983 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2986 static inline int dev_parse_header(const struct sk_buff *skb,
2987 unsigned char *haddr)
2989 const struct net_device *dev = skb->dev;
2991 if (!dev->header_ops || !dev->header_ops->parse)
2993 return dev->header_ops->parse(skb, haddr);
2996 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2998 const struct net_device *dev = skb->dev;
3000 if (!dev->header_ops || !dev->header_ops->parse_protocol)
3002 return dev->header_ops->parse_protocol(skb);
3005 /* ll_header must have at least hard_header_len allocated */
3006 static inline bool dev_validate_header(const struct net_device *dev,
3007 char *ll_header, int len)
3009 if (likely(len >= dev->hard_header_len))
3011 if (len < dev->min_header_len)
3014 if (capable(CAP_SYS_RAWIO)) {
3015 memset(ll_header + len, 0, dev->hard_header_len - len);
3019 if (dev->header_ops && dev->header_ops->validate)
3020 return dev->header_ops->validate(ll_header, len);
3025 static inline bool dev_has_header(const struct net_device *dev)
3027 return dev->header_ops && dev->header_ops->create;
3030 #ifdef CONFIG_NET_FLOW_LIMIT
3031 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
3032 struct sd_flow_limit {
3034 unsigned int num_buckets;
3035 unsigned int history_head;
3036 u16 history[FLOW_LIMIT_HISTORY];
3040 extern int netdev_flow_limit_table_len;
3041 #endif /* CONFIG_NET_FLOW_LIMIT */
3044 * Incoming packets are placed on per-CPU queues
3046 struct softnet_data {
3047 struct list_head poll_list;
3048 struct sk_buff_head process_queue;
3051 unsigned int processed;
3052 unsigned int time_squeeze;
3053 unsigned int received_rps;
3055 struct softnet_data *rps_ipi_list;
3057 #ifdef CONFIG_NET_FLOW_LIMIT
3058 struct sd_flow_limit __rcu *flow_limit;
3060 struct Qdisc *output_queue;
3061 struct Qdisc **output_queue_tailp;
3062 struct sk_buff *completion_queue;
3063 #ifdef CONFIG_XFRM_OFFLOAD
3064 struct sk_buff_head xfrm_backlog;
3066 /* written and read only by owning cpu: */
3072 /* input_queue_head should be written by cpu owning this struct,
3073 * and only read by other cpus. Worth using a cache line.
3075 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3077 /* Elements below can be accessed between CPUs for RPS/RFS */
3078 call_single_data_t csd ____cacheline_aligned_in_smp;
3079 struct softnet_data *rps_ipi_next;
3081 unsigned int input_queue_tail;
3083 unsigned int dropped;
3084 struct sk_buff_head input_pkt_queue;
3085 struct napi_struct backlog;
3089 static inline void input_queue_head_incr(struct softnet_data *sd)
3092 sd->input_queue_head++;
3096 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3097 unsigned int *qtail)
3100 *qtail = ++sd->input_queue_tail;
3104 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3106 static inline int dev_recursion_level(void)
3108 return this_cpu_read(softnet_data.xmit.recursion);
3111 #define XMIT_RECURSION_LIMIT 8
3112 static inline bool dev_xmit_recursion(void)
3114 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3115 XMIT_RECURSION_LIMIT);
3118 static inline void dev_xmit_recursion_inc(void)
3120 __this_cpu_inc(softnet_data.xmit.recursion);
3123 static inline void dev_xmit_recursion_dec(void)
3125 __this_cpu_dec(softnet_data.xmit.recursion);
3128 void __netif_schedule(struct Qdisc *q);
3129 void netif_schedule_queue(struct netdev_queue *txq);
3131 static inline void netif_tx_schedule_all(struct net_device *dev)
3135 for (i = 0; i < dev->num_tx_queues; i++)
3136 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3139 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3141 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3145 * netif_start_queue - allow transmit
3146 * @dev: network device
3148 * Allow upper layers to call the device hard_start_xmit routine.
3150 static inline void netif_start_queue(struct net_device *dev)
3152 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3155 static inline void netif_tx_start_all_queues(struct net_device *dev)
3159 for (i = 0; i < dev->num_tx_queues; i++) {
3160 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3161 netif_tx_start_queue(txq);
3165 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3168 * netif_wake_queue - restart transmit
3169 * @dev: network device
3171 * Allow upper layers to call the device hard_start_xmit routine.
3172 * Used for flow control when transmit resources are available.
3174 static inline void netif_wake_queue(struct net_device *dev)
3176 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3179 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3183 for (i = 0; i < dev->num_tx_queues; i++) {
3184 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3185 netif_tx_wake_queue(txq);
3189 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3191 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3195 * netif_stop_queue - stop transmitted packets
3196 * @dev: network device
3198 * Stop upper layers calling the device hard_start_xmit routine.
3199 * Used for flow control when transmit resources are unavailable.
3201 static inline void netif_stop_queue(struct net_device *dev)
3203 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3206 void netif_tx_stop_all_queues(struct net_device *dev);
3208 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3210 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3214 * netif_queue_stopped - test if transmit queue is flowblocked
3215 * @dev: network device
3217 * Test if transmit queue on device is currently unable to send.
3219 static inline bool netif_queue_stopped(const struct net_device *dev)
3221 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3224 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3226 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3230 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3232 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3236 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3238 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3242 * netdev_queue_set_dql_min_limit - set dql minimum limit
3243 * @dev_queue: pointer to transmit queue
3244 * @min_limit: dql minimum limit
3246 * Forces xmit_more() to return true until the minimum threshold
3247 * defined by @min_limit is reached (or until the tx queue is
3248 * empty). Warning: to be use with care, misuse will impact the
3251 static inline void netdev_queue_set_dql_min_limit(struct netdev_queue *dev_queue,
3252 unsigned int min_limit)
3255 dev_queue->dql.min_limit = min_limit;
3260 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3261 * @dev_queue: pointer to transmit queue
3263 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3264 * to give appropriate hint to the CPU.
3266 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3269 prefetchw(&dev_queue->dql.num_queued);
3274 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3275 * @dev_queue: pointer to transmit queue
3277 * BQL enabled drivers might use this helper in their TX completion path,
3278 * to give appropriate hint to the CPU.
3280 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3283 prefetchw(&dev_queue->dql.limit);
3287 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3291 dql_queued(&dev_queue->dql, bytes);
3293 if (likely(dql_avail(&dev_queue->dql) >= 0))
3296 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3299 * The XOFF flag must be set before checking the dql_avail below,
3300 * because in netdev_tx_completed_queue we update the dql_completed
3301 * before checking the XOFF flag.
3305 /* check again in case another CPU has just made room avail */
3306 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3307 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3311 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3312 * that they should not test BQL status themselves.
3313 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3315 * Returns true if the doorbell must be used to kick the NIC.
3317 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3323 dql_queued(&dev_queue->dql, bytes);
3325 return netif_tx_queue_stopped(dev_queue);
3327 netdev_tx_sent_queue(dev_queue, bytes);
3332 * netdev_sent_queue - report the number of bytes queued to hardware
3333 * @dev: network device
3334 * @bytes: number of bytes queued to the hardware device queue
3336 * Report the number of bytes queued for sending/completion to the network
3337 * device hardware queue. @bytes should be a good approximation and should
3338 * exactly match netdev_completed_queue() @bytes
3340 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3342 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3345 static inline bool __netdev_sent_queue(struct net_device *dev,
3349 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3353 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3354 unsigned int pkts, unsigned int bytes)
3357 if (unlikely(!bytes))
3360 dql_completed(&dev_queue->dql, bytes);
3363 * Without the memory barrier there is a small possiblity that
3364 * netdev_tx_sent_queue will miss the update and cause the queue to
3365 * be stopped forever
3369 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3372 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3373 netif_schedule_queue(dev_queue);
3378 * netdev_completed_queue - report bytes and packets completed by device
3379 * @dev: network device
3380 * @pkts: actual number of packets sent over the medium
3381 * @bytes: actual number of bytes sent over the medium
3383 * Report the number of bytes and packets transmitted by the network device
3384 * hardware queue over the physical medium, @bytes must exactly match the
3385 * @bytes amount passed to netdev_sent_queue()
3387 static inline void netdev_completed_queue(struct net_device *dev,
3388 unsigned int pkts, unsigned int bytes)
3390 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3393 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3396 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3402 * netdev_reset_queue - reset the packets and bytes count of a network device
3403 * @dev_queue: network device
3405 * Reset the bytes and packet count of a network device and clear the
3406 * software flow control OFF bit for this network device
3408 static inline void netdev_reset_queue(struct net_device *dev_queue)
3410 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3414 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3415 * @dev: network device
3416 * @queue_index: given tx queue index
3418 * Returns 0 if given tx queue index >= number of device tx queues,
3419 * otherwise returns the originally passed tx queue index.
3421 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3423 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3424 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3425 dev->name, queue_index,
3426 dev->real_num_tx_queues);
3434 * netif_running - test if up
3435 * @dev: network device
3437 * Test if the device has been brought up.
3439 static inline bool netif_running(const struct net_device *dev)
3441 return test_bit(__LINK_STATE_START, &dev->state);
3445 * Routines to manage the subqueues on a device. We only need start,
3446 * stop, and a check if it's stopped. All other device management is
3447 * done at the overall netdevice level.
3448 * Also test the device if we're multiqueue.
3452 * netif_start_subqueue - allow sending packets on subqueue
3453 * @dev: network device
3454 * @queue_index: sub queue index
3456 * Start individual transmit queue of a device with multiple transmit queues.
3458 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3460 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3462 netif_tx_start_queue(txq);
3466 * netif_stop_subqueue - stop sending packets on subqueue
3467 * @dev: network device
3468 * @queue_index: sub queue index
3470 * Stop individual transmit queue of a device with multiple transmit queues.
3472 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3474 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3475 netif_tx_stop_queue(txq);
3479 * __netif_subqueue_stopped - test status of subqueue
3480 * @dev: network device
3481 * @queue_index: sub queue index
3483 * Check individual transmit queue of a device with multiple transmit queues.
3485 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3488 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3490 return netif_tx_queue_stopped(txq);
3494 * netif_subqueue_stopped - test status of subqueue
3495 * @dev: network device
3496 * @skb: sub queue buffer pointer
3498 * Check individual transmit queue of a device with multiple transmit queues.
3500 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3501 struct sk_buff *skb)
3503 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3507 * netif_wake_subqueue - allow sending packets on subqueue
3508 * @dev: network device
3509 * @queue_index: sub queue index
3511 * Resume individual transmit queue of a device with multiple transmit queues.
3513 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3515 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3517 netif_tx_wake_queue(txq);
3521 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3523 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3524 u16 index, enum xps_map_type type);
3527 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3528 * @j: CPU/Rx queue index
3529 * @mask: bitmask of all cpus/rx queues
3530 * @nr_bits: number of bits in the bitmask
3532 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3534 static inline bool netif_attr_test_mask(unsigned long j,
3535 const unsigned long *mask,
3536 unsigned int nr_bits)
3538 cpu_max_bits_warn(j, nr_bits);
3539 return test_bit(j, mask);
3543 * netif_attr_test_online - Test for online CPU/Rx queue
3544 * @j: CPU/Rx queue index
3545 * @online_mask: bitmask for CPUs/Rx queues that are online
3546 * @nr_bits: number of bits in the bitmask
3548 * Returns true if a CPU/Rx queue is online.
3550 static inline bool netif_attr_test_online(unsigned long j,
3551 const unsigned long *online_mask,
3552 unsigned int nr_bits)
3554 cpu_max_bits_warn(j, nr_bits);
3557 return test_bit(j, online_mask);
3559 return (j < nr_bits);
3563 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3564 * @n: CPU/Rx queue index
3565 * @srcp: the cpumask/Rx queue mask pointer
3566 * @nr_bits: number of bits in the bitmask
3568 * Returns >= nr_bits if no further CPUs/Rx queues set.
3570 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3571 unsigned int nr_bits)
3573 /* -1 is a legal arg here. */
3575 cpu_max_bits_warn(n, nr_bits);
3578 return find_next_bit(srcp, nr_bits, n + 1);
3584 * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p
3585 * @n: CPU/Rx queue index
3586 * @src1p: the first CPUs/Rx queues mask pointer
3587 * @src2p: the second CPUs/Rx queues mask pointer
3588 * @nr_bits: number of bits in the bitmask
3590 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3592 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3593 const unsigned long *src2p,
3594 unsigned int nr_bits)
3596 /* -1 is a legal arg here. */
3598 cpu_max_bits_warn(n, nr_bits);
3601 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3603 return find_next_bit(src1p, nr_bits, n + 1);
3605 return find_next_bit(src2p, nr_bits, n + 1);
3610 static inline int netif_set_xps_queue(struct net_device *dev,
3611 const struct cpumask *mask,
3617 static inline int __netif_set_xps_queue(struct net_device *dev,
3618 const unsigned long *mask,
3619 u16 index, enum xps_map_type type)
3626 * netif_is_multiqueue - test if device has multiple transmit queues
3627 * @dev: network device
3629 * Check if device has multiple transmit queues
3631 static inline bool netif_is_multiqueue(const struct net_device *dev)
3633 return dev->num_tx_queues > 1;
3636 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3639 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3641 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3644 dev->real_num_rx_queues = rxqs;
3648 int netif_set_real_num_queues(struct net_device *dev,
3649 unsigned int txq, unsigned int rxq);
3651 static inline struct netdev_rx_queue *
3652 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3654 return dev->_rx + rxq;
3658 static inline unsigned int get_netdev_rx_queue_index(
3659 struct netdev_rx_queue *queue)
3661 struct net_device *dev = queue->dev;
3662 int index = queue - dev->_rx;
3664 BUG_ON(index >= dev->num_rx_queues);
3669 int netif_get_num_default_rss_queues(void);
3671 enum skb_free_reason {
3672 SKB_REASON_CONSUMED,
3676 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3677 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3680 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3681 * interrupt context or with hardware interrupts being disabled.
3682 * (in_hardirq() || irqs_disabled())
3684 * We provide four helpers that can be used in following contexts :
3686 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3687 * replacing kfree_skb(skb)
3689 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3690 * Typically used in place of consume_skb(skb) in TX completion path
3692 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3693 * replacing kfree_skb(skb)
3695 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3696 * and consumed a packet. Used in place of consume_skb(skb)
3698 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3700 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3703 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3705 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3708 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3710 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3713 static inline void dev_consume_skb_any(struct sk_buff *skb)
3715 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3718 u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp,
3719 struct bpf_prog *xdp_prog);
3720 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3721 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3722 int netif_rx(struct sk_buff *skb);
3723 int __netif_rx(struct sk_buff *skb);
3725 int netif_receive_skb(struct sk_buff *skb);
3726 int netif_receive_skb_core(struct sk_buff *skb);
3727 void netif_receive_skb_list_internal(struct list_head *head);
3728 void netif_receive_skb_list(struct list_head *head);
3729 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3730 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3731 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3732 gro_result_t napi_gro_frags(struct napi_struct *napi);
3733 struct packet_offload *gro_find_receive_by_type(__be16 type);
3734 struct packet_offload *gro_find_complete_by_type(__be16 type);
3736 static inline void napi_free_frags(struct napi_struct *napi)
3738 kfree_skb(napi->skb);
3742 bool netdev_is_rx_handler_busy(struct net_device *dev);
3743 int netdev_rx_handler_register(struct net_device *dev,
3744 rx_handler_func_t *rx_handler,
3745 void *rx_handler_data);
3746 void netdev_rx_handler_unregister(struct net_device *dev);
3748 bool dev_valid_name(const char *name);
3749 static inline bool is_socket_ioctl_cmd(unsigned int cmd)
3751 return _IOC_TYPE(cmd) == SOCK_IOC_TYPE;
3753 int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg);
3754 int put_user_ifreq(struct ifreq *ifr, void __user *arg);
3755 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3756 void __user *data, bool *need_copyout);
3757 int dev_ifconf(struct net *net, struct ifconf __user *ifc);
3758 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *userdata);
3759 unsigned int dev_get_flags(const struct net_device *);
3760 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3761 struct netlink_ext_ack *extack);
3762 int dev_change_flags(struct net_device *dev, unsigned int flags,
3763 struct netlink_ext_ack *extack);
3764 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3765 unsigned int gchanges);
3766 int dev_change_name(struct net_device *, const char *);
3767 int dev_set_alias(struct net_device *, const char *, size_t);
3768 int dev_get_alias(const struct net_device *, char *, size_t);
3769 int __dev_change_net_namespace(struct net_device *dev, struct net *net,
3770 const char *pat, int new_ifindex);
3772 int dev_change_net_namespace(struct net_device *dev, struct net *net,
3775 return __dev_change_net_namespace(dev, net, pat, 0);
3777 int __dev_set_mtu(struct net_device *, int);
3778 int dev_validate_mtu(struct net_device *dev, int mtu,
3779 struct netlink_ext_ack *extack);
3780 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3781 struct netlink_ext_ack *extack);
3782 int dev_set_mtu(struct net_device *, int);
3783 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3784 void dev_set_group(struct net_device *, int);
3785 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3786 struct netlink_ext_ack *extack);
3787 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3788 struct netlink_ext_ack *extack);
3789 int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa,
3790 struct netlink_ext_ack *extack);
3791 int dev_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name);
3792 int dev_change_carrier(struct net_device *, bool new_carrier);
3793 int dev_get_phys_port_id(struct net_device *dev,
3794 struct netdev_phys_item_id *ppid);
3795 int dev_get_phys_port_name(struct net_device *dev,
3796 char *name, size_t len);
3797 int dev_get_port_parent_id(struct net_device *dev,
3798 struct netdev_phys_item_id *ppid, bool recurse);
3799 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3800 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3801 void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
3803 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3804 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3805 struct netdev_queue *txq, int *ret);
3807 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3808 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3809 int fd, int expected_fd, u32 flags);
3810 int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
3811 u8 dev_xdp_prog_count(struct net_device *dev);
3812 u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode);
3814 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3815 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3816 int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb);
3817 bool is_skb_forwardable(const struct net_device *dev,
3818 const struct sk_buff *skb);
3820 static __always_inline bool __is_skb_forwardable(const struct net_device *dev,
3821 const struct sk_buff *skb,
3822 const bool check_mtu)
3824 const u32 vlan_hdr_len = 4; /* VLAN_HLEN */
3827 if (!(dev->flags & IFF_UP))
3833 len = dev->mtu + dev->hard_header_len + vlan_hdr_len;
3834 if (skb->len <= len)
3837 /* if TSO is enabled, we don't care about the length as the packet
3838 * could be forwarded without being segmented before
3840 if (skb_is_gso(skb))
3846 struct net_device_core_stats *netdev_core_stats_alloc(struct net_device *dev);
3848 static inline struct net_device_core_stats *dev_core_stats(struct net_device *dev)
3850 /* This READ_ONCE() pairs with the write in netdev_core_stats_alloc() */
3851 struct net_device_core_stats __percpu *p = READ_ONCE(dev->core_stats);
3854 return this_cpu_ptr(p);
3856 return netdev_core_stats_alloc(dev);
3859 #define DEV_CORE_STATS_INC(FIELD) \
3860 static inline void dev_core_stats_##FIELD##_inc(struct net_device *dev) \
3862 struct net_device_core_stats *p; \
3864 preempt_disable(); \
3865 p = dev_core_stats(dev); \
3868 local_inc(&p->FIELD); \
3871 DEV_CORE_STATS_INC(rx_dropped)
3872 DEV_CORE_STATS_INC(tx_dropped)
3873 DEV_CORE_STATS_INC(rx_nohandler)
3875 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3876 struct sk_buff *skb,
3877 const bool check_mtu)
3879 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3880 unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) {
3881 dev_core_stats_rx_dropped_inc(dev);
3886 skb_scrub_packet(skb, !net_eq(dev_net(dev), dev_net(skb->dev)));
3891 bool dev_nit_active(struct net_device *dev);
3892 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3894 extern int netdev_budget;
3895 extern unsigned int netdev_budget_usecs;
3897 /* Called by rtnetlink.c:rtnl_unlock() */
3898 void netdev_run_todo(void);
3900 static inline void __dev_put(struct net_device *dev)
3903 #ifdef CONFIG_PCPU_DEV_REFCNT
3904 this_cpu_dec(*dev->pcpu_refcnt);
3906 refcount_dec(&dev->dev_refcnt);
3911 static inline void __dev_hold(struct net_device *dev)
3914 #ifdef CONFIG_PCPU_DEV_REFCNT
3915 this_cpu_inc(*dev->pcpu_refcnt);
3917 refcount_inc(&dev->dev_refcnt);
3922 static inline void __netdev_tracker_alloc(struct net_device *dev,
3923 netdevice_tracker *tracker,
3926 #ifdef CONFIG_NET_DEV_REFCNT_TRACKER
3927 ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp);
3931 /* netdev_tracker_alloc() can upgrade a prior untracked reference
3932 * taken by dev_get_by_name()/dev_get_by_index() to a tracked one.
3934 static inline void netdev_tracker_alloc(struct net_device *dev,
3935 netdevice_tracker *tracker, gfp_t gfp)
3937 #ifdef CONFIG_NET_DEV_REFCNT_TRACKER
3938 refcount_dec(&dev->refcnt_tracker.no_tracker);
3939 __netdev_tracker_alloc(dev, tracker, gfp);
3943 static inline void netdev_tracker_free(struct net_device *dev,
3944 netdevice_tracker *tracker)
3946 #ifdef CONFIG_NET_DEV_REFCNT_TRACKER
3947 ref_tracker_free(&dev->refcnt_tracker, tracker);
3951 static inline void dev_hold_track(struct net_device *dev,
3952 netdevice_tracker *tracker, gfp_t gfp)
3956 __netdev_tracker_alloc(dev, tracker, gfp);
3960 static inline void dev_put_track(struct net_device *dev,
3961 netdevice_tracker *tracker)
3964 netdev_tracker_free(dev, tracker);
3970 * dev_hold - get reference to device
3971 * @dev: network device
3973 * Hold reference to device to keep it from being freed.
3974 * Try using dev_hold_track() instead.
3976 static inline void dev_hold(struct net_device *dev)
3978 dev_hold_track(dev, NULL, GFP_ATOMIC);
3982 * dev_put - release reference to device
3983 * @dev: network device
3985 * Release reference to device to allow it to be freed.
3986 * Try using dev_put_track() instead.
3988 static inline void dev_put(struct net_device *dev)
3990 dev_put_track(dev, NULL);
3993 static inline void dev_replace_track(struct net_device *odev,
3994 struct net_device *ndev,
3995 netdevice_tracker *tracker,
3999 netdev_tracker_free(odev, tracker);
4005 __netdev_tracker_alloc(ndev, tracker, gfp);
4008 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
4009 * and _off may be called from IRQ context, but it is caller
4010 * who is responsible for serialization of these calls.
4012 * The name carrier is inappropriate, these functions should really be
4013 * called netif_lowerlayer_*() because they represent the state of any
4014 * kind of lower layer not just hardware media.
4017 void linkwatch_init_dev(struct net_device *dev);
4018 void linkwatch_fire_event(struct net_device *dev);
4019 void linkwatch_forget_dev(struct net_device *dev);
4022 * netif_carrier_ok - test if carrier present
4023 * @dev: network device
4025 * Check if carrier is present on device
4027 static inline bool netif_carrier_ok(const struct net_device *dev)
4029 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
4032 unsigned long dev_trans_start(struct net_device *dev);
4034 void __netdev_watchdog_up(struct net_device *dev);
4036 void netif_carrier_on(struct net_device *dev);
4037 void netif_carrier_off(struct net_device *dev);
4038 void netif_carrier_event(struct net_device *dev);
4041 * netif_dormant_on - mark device as dormant.
4042 * @dev: network device
4044 * Mark device as dormant (as per RFC2863).
4046 * The dormant state indicates that the relevant interface is not
4047 * actually in a condition to pass packets (i.e., it is not 'up') but is
4048 * in a "pending" state, waiting for some external event. For "on-
4049 * demand" interfaces, this new state identifies the situation where the
4050 * interface is waiting for events to place it in the up state.
4052 static inline void netif_dormant_on(struct net_device *dev)
4054 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
4055 linkwatch_fire_event(dev);
4059 * netif_dormant_off - set device as not dormant.
4060 * @dev: network device
4062 * Device is not in dormant state.
4064 static inline void netif_dormant_off(struct net_device *dev)
4066 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
4067 linkwatch_fire_event(dev);
4071 * netif_dormant - test if device is dormant
4072 * @dev: network device
4074 * Check if device is dormant.
4076 static inline bool netif_dormant(const struct net_device *dev)
4078 return test_bit(__LINK_STATE_DORMANT, &dev->state);
4083 * netif_testing_on - mark device as under test.
4084 * @dev: network device
4086 * Mark device as under test (as per RFC2863).
4088 * The testing state indicates that some test(s) must be performed on
4089 * the interface. After completion, of the test, the interface state
4090 * will change to up, dormant, or down, as appropriate.
4092 static inline void netif_testing_on(struct net_device *dev)
4094 if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state))
4095 linkwatch_fire_event(dev);
4099 * netif_testing_off - set device as not under test.
4100 * @dev: network device
4102 * Device is not in testing state.
4104 static inline void netif_testing_off(struct net_device *dev)
4106 if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state))
4107 linkwatch_fire_event(dev);
4111 * netif_testing - test if device is under test
4112 * @dev: network device
4114 * Check if device is under test
4116 static inline bool netif_testing(const struct net_device *dev)
4118 return test_bit(__LINK_STATE_TESTING, &dev->state);
4123 * netif_oper_up - test if device is operational
4124 * @dev: network device
4126 * Check if carrier is operational
4128 static inline bool netif_oper_up(const struct net_device *dev)
4130 return (dev->operstate == IF_OPER_UP ||
4131 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
4135 * netif_device_present - is device available or removed
4136 * @dev: network device
4138 * Check if device has not been removed from system.
4140 static inline bool netif_device_present(const struct net_device *dev)
4142 return test_bit(__LINK_STATE_PRESENT, &dev->state);
4145 void netif_device_detach(struct net_device *dev);
4147 void netif_device_attach(struct net_device *dev);
4150 * Network interface message level settings
4155 NETIF_MSG_PROBE_BIT,
4157 NETIF_MSG_TIMER_BIT,
4158 NETIF_MSG_IFDOWN_BIT,
4160 NETIF_MSG_RX_ERR_BIT,
4161 NETIF_MSG_TX_ERR_BIT,
4162 NETIF_MSG_TX_QUEUED_BIT,
4164 NETIF_MSG_TX_DONE_BIT,
4165 NETIF_MSG_RX_STATUS_BIT,
4166 NETIF_MSG_PKTDATA_BIT,
4170 /* When you add a new bit above, update netif_msg_class_names array
4171 * in net/ethtool/common.c
4173 NETIF_MSG_CLASS_COUNT,
4175 /* Both ethtool_ops interface and internal driver implementation use u32 */
4176 static_assert(NETIF_MSG_CLASS_COUNT <= 32);
4178 #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))
4179 #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)
4181 #define NETIF_MSG_DRV __NETIF_MSG(DRV)
4182 #define NETIF_MSG_PROBE __NETIF_MSG(PROBE)
4183 #define NETIF_MSG_LINK __NETIF_MSG(LINK)
4184 #define NETIF_MSG_TIMER __NETIF_MSG(TIMER)
4185 #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)
4186 #define NETIF_MSG_IFUP __NETIF_MSG(IFUP)
4187 #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)
4188 #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)
4189 #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)
4190 #define NETIF_MSG_INTR __NETIF_MSG(INTR)
4191 #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)
4192 #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)
4193 #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)
4194 #define NETIF_MSG_HW __NETIF_MSG(HW)
4195 #define NETIF_MSG_WOL __NETIF_MSG(WOL)
4197 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
4198 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
4199 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
4200 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
4201 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
4202 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
4203 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
4204 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
4205 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
4206 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
4207 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
4208 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
4209 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
4210 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
4211 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
4213 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
4216 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
4217 return default_msg_enable_bits;
4218 if (debug_value == 0) /* no output */
4220 /* set low N bits */
4221 return (1U << debug_value) - 1;
4224 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
4226 spin_lock(&txq->_xmit_lock);
4227 /* Pairs with READ_ONCE() in __dev_queue_xmit() */
4228 WRITE_ONCE(txq->xmit_lock_owner, cpu);
4231 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
4233 __acquire(&txq->_xmit_lock);
4237 static inline void __netif_tx_release(struct netdev_queue *txq)
4239 __release(&txq->_xmit_lock);
4242 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
4244 spin_lock_bh(&txq->_xmit_lock);
4245 /* Pairs with READ_ONCE() in __dev_queue_xmit() */
4246 WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id());
4249 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
4251 bool ok = spin_trylock(&txq->_xmit_lock);
4254 /* Pairs with READ_ONCE() in __dev_queue_xmit() */
4255 WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id());
4260 static inline void __netif_tx_unlock(struct netdev_queue *txq)
4262 /* Pairs with READ_ONCE() in __dev_queue_xmit() */
4263 WRITE_ONCE(txq->xmit_lock_owner, -1);
4264 spin_unlock(&txq->_xmit_lock);
4267 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
4269 /* Pairs with READ_ONCE() in __dev_queue_xmit() */
4270 WRITE_ONCE(txq->xmit_lock_owner, -1);
4271 spin_unlock_bh(&txq->_xmit_lock);
4275 * txq->trans_start can be read locklessly from dev_watchdog()
4277 static inline void txq_trans_update(struct netdev_queue *txq)
4279 if (txq->xmit_lock_owner != -1)
4280 WRITE_ONCE(txq->trans_start, jiffies);
4283 static inline void txq_trans_cond_update(struct netdev_queue *txq)
4285 unsigned long now = jiffies;
4287 if (READ_ONCE(txq->trans_start) != now)
4288 WRITE_ONCE(txq->trans_start, now);
4291 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
4292 static inline void netif_trans_update(struct net_device *dev)
4294 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
4296 txq_trans_cond_update(txq);
4300 * netif_tx_lock - grab network device transmit lock
4301 * @dev: network device
4303 * Get network device transmit lock
4305 void netif_tx_lock(struct net_device *dev);
4307 static inline void netif_tx_lock_bh(struct net_device *dev)
4313 void netif_tx_unlock(struct net_device *dev);
4315 static inline void netif_tx_unlock_bh(struct net_device *dev)
4317 netif_tx_unlock(dev);
4321 #define HARD_TX_LOCK(dev, txq, cpu) { \
4322 if ((dev->features & NETIF_F_LLTX) == 0) { \
4323 __netif_tx_lock(txq, cpu); \
4325 __netif_tx_acquire(txq); \
4329 #define HARD_TX_TRYLOCK(dev, txq) \
4330 (((dev->features & NETIF_F_LLTX) == 0) ? \
4331 __netif_tx_trylock(txq) : \
4332 __netif_tx_acquire(txq))
4334 #define HARD_TX_UNLOCK(dev, txq) { \
4335 if ((dev->features & NETIF_F_LLTX) == 0) { \
4336 __netif_tx_unlock(txq); \
4338 __netif_tx_release(txq); \
4342 static inline void netif_tx_disable(struct net_device *dev)
4348 cpu = smp_processor_id();
4349 spin_lock(&dev->tx_global_lock);
4350 for (i = 0; i < dev->num_tx_queues; i++) {
4351 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4353 __netif_tx_lock(txq, cpu);
4354 netif_tx_stop_queue(txq);
4355 __netif_tx_unlock(txq);
4357 spin_unlock(&dev->tx_global_lock);
4361 static inline void netif_addr_lock(struct net_device *dev)
4363 unsigned char nest_level = 0;
4365 #ifdef CONFIG_LOCKDEP
4366 nest_level = dev->nested_level;
4368 spin_lock_nested(&dev->addr_list_lock, nest_level);
4371 static inline void netif_addr_lock_bh(struct net_device *dev)
4373 unsigned char nest_level = 0;
4375 #ifdef CONFIG_LOCKDEP
4376 nest_level = dev->nested_level;
4379 spin_lock_nested(&dev->addr_list_lock, nest_level);
4382 static inline void netif_addr_unlock(struct net_device *dev)
4384 spin_unlock(&dev->addr_list_lock);
4387 static inline void netif_addr_unlock_bh(struct net_device *dev)
4389 spin_unlock_bh(&dev->addr_list_lock);
4393 * dev_addrs walker. Should be used only for read access. Call with
4394 * rcu_read_lock held.
4396 #define for_each_dev_addr(dev, ha) \
4397 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4399 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4401 void ether_setup(struct net_device *dev);
4403 /* Support for loadable net-drivers */
4404 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4405 unsigned char name_assign_type,
4406 void (*setup)(struct net_device *),
4407 unsigned int txqs, unsigned int rxqs);
4408 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4409 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4411 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4412 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4415 int register_netdev(struct net_device *dev);
4416 void unregister_netdev(struct net_device *dev);
4418 int devm_register_netdev(struct device *dev, struct net_device *ndev);
4420 /* General hardware address lists handling functions */
4421 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4422 struct netdev_hw_addr_list *from_list, int addr_len);
4423 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4424 struct netdev_hw_addr_list *from_list, int addr_len);
4425 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4426 struct net_device *dev,
4427 int (*sync)(struct net_device *, const unsigned char *),
4428 int (*unsync)(struct net_device *,
4429 const unsigned char *));
4430 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4431 struct net_device *dev,
4432 int (*sync)(struct net_device *,
4433 const unsigned char *, int),
4434 int (*unsync)(struct net_device *,
4435 const unsigned char *, int));
4436 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4437 struct net_device *dev,
4438 int (*unsync)(struct net_device *,
4439 const unsigned char *, int));
4440 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4441 struct net_device *dev,
4442 int (*unsync)(struct net_device *,
4443 const unsigned char *));
4444 void __hw_addr_init(struct netdev_hw_addr_list *list);
4446 /* Functions used for device addresses handling */
4447 void dev_addr_mod(struct net_device *dev, unsigned int offset,
4448 const void *addr, size_t len);
4451 __dev_addr_set(struct net_device *dev, const void *addr, size_t len)
4453 dev_addr_mod(dev, 0, addr, len);
4456 static inline void dev_addr_set(struct net_device *dev, const u8 *addr)
4458 __dev_addr_set(dev, addr, dev->addr_len);
4461 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4462 unsigned char addr_type);
4463 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4464 unsigned char addr_type);
4465 void dev_addr_flush(struct net_device *dev);
4466 int dev_addr_init(struct net_device *dev);
4467 void dev_addr_check(struct net_device *dev);
4469 /* Functions used for unicast addresses handling */
4470 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4471 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4472 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4473 int dev_uc_sync(struct net_device *to, struct net_device *from);
4474 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4475 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4476 void dev_uc_flush(struct net_device *dev);
4477 void dev_uc_init(struct net_device *dev);
4480 * __dev_uc_sync - Synchonize device's unicast list
4481 * @dev: device to sync
4482 * @sync: function to call if address should be added
4483 * @unsync: function to call if address should be removed
4485 * Add newly added addresses to the interface, and release
4486 * addresses that have been deleted.
4488 static inline int __dev_uc_sync(struct net_device *dev,
4489 int (*sync)(struct net_device *,
4490 const unsigned char *),
4491 int (*unsync)(struct net_device *,
4492 const unsigned char *))
4494 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4498 * __dev_uc_unsync - Remove synchronized addresses from device
4499 * @dev: device to sync
4500 * @unsync: function to call if address should be removed
4502 * Remove all addresses that were added to the device by dev_uc_sync().
4504 static inline void __dev_uc_unsync(struct net_device *dev,
4505 int (*unsync)(struct net_device *,
4506 const unsigned char *))
4508 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4511 /* Functions used for multicast addresses handling */
4512 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4513 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4514 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4515 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4516 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4517 int dev_mc_sync(struct net_device *to, struct net_device *from);
4518 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4519 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4520 void dev_mc_flush(struct net_device *dev);
4521 void dev_mc_init(struct net_device *dev);
4524 * __dev_mc_sync - Synchonize device's multicast list
4525 * @dev: device to sync
4526 * @sync: function to call if address should be added
4527 * @unsync: function to call if address should be removed
4529 * Add newly added addresses to the interface, and release
4530 * addresses that have been deleted.
4532 static inline int __dev_mc_sync(struct net_device *dev,
4533 int (*sync)(struct net_device *,
4534 const unsigned char *),
4535 int (*unsync)(struct net_device *,
4536 const unsigned char *))
4538 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4542 * __dev_mc_unsync - Remove synchronized addresses from device
4543 * @dev: device to sync
4544 * @unsync: function to call if address should be removed
4546 * Remove all addresses that were added to the device by dev_mc_sync().
4548 static inline void __dev_mc_unsync(struct net_device *dev,
4549 int (*unsync)(struct net_device *,
4550 const unsigned char *))
4552 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4555 /* Functions used for secondary unicast and multicast support */
4556 void dev_set_rx_mode(struct net_device *dev);
4557 void __dev_set_rx_mode(struct net_device *dev);
4558 int dev_set_promiscuity(struct net_device *dev, int inc);
4559 int dev_set_allmulti(struct net_device *dev, int inc);
4560 void netdev_state_change(struct net_device *dev);
4561 void __netdev_notify_peers(struct net_device *dev);
4562 void netdev_notify_peers(struct net_device *dev);
4563 void netdev_features_change(struct net_device *dev);
4564 /* Load a device via the kmod */
4565 void dev_load(struct net *net, const char *name);
4566 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4567 struct rtnl_link_stats64 *storage);
4568 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4569 const struct net_device_stats *netdev_stats);
4570 void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,
4571 const struct pcpu_sw_netstats __percpu *netstats);
4572 void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s);
4574 extern int netdev_max_backlog;
4575 extern int netdev_tstamp_prequeue;
4576 extern int netdev_unregister_timeout_secs;
4577 extern int weight_p;
4578 extern int dev_weight_rx_bias;
4579 extern int dev_weight_tx_bias;
4580 extern int dev_rx_weight;
4581 extern int dev_tx_weight;
4582 extern int gro_normal_batch;
4585 NESTED_SYNC_IMM_BIT,
4586 NESTED_SYNC_TODO_BIT,
4589 #define __NESTED_SYNC_BIT(bit) ((u32)1 << (bit))
4590 #define __NESTED_SYNC(name) __NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT)
4592 #define NESTED_SYNC_IMM __NESTED_SYNC(IMM)
4593 #define NESTED_SYNC_TODO __NESTED_SYNC(TODO)
4595 struct netdev_nested_priv {
4596 unsigned char flags;
4600 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4601 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4602 struct list_head **iter);
4604 #ifdef CONFIG_LOCKDEP
4605 static LIST_HEAD(net_unlink_list);
4607 static inline void net_unlink_todo(struct net_device *dev)
4609 if (list_empty(&dev->unlink_list))
4610 list_add_tail(&dev->unlink_list, &net_unlink_list);
4614 /* iterate through upper list, must be called under RCU read lock */
4615 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4616 for (iter = &(dev)->adj_list.upper, \
4617 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4619 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4621 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4622 int (*fn)(struct net_device *upper_dev,
4623 struct netdev_nested_priv *priv),
4624 struct netdev_nested_priv *priv);
4626 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4627 struct net_device *upper_dev);
4629 bool netdev_has_any_upper_dev(struct net_device *dev);
4631 void *netdev_lower_get_next_private(struct net_device *dev,
4632 struct list_head **iter);
4633 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4634 struct list_head **iter);
4636 #define netdev_for_each_lower_private(dev, priv, iter) \
4637 for (iter = (dev)->adj_list.lower.next, \
4638 priv = netdev_lower_get_next_private(dev, &(iter)); \
4640 priv = netdev_lower_get_next_private(dev, &(iter)))
4642 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4643 for (iter = &(dev)->adj_list.lower, \
4644 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4646 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4648 void *netdev_lower_get_next(struct net_device *dev,
4649 struct list_head **iter);
4651 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4652 for (iter = (dev)->adj_list.lower.next, \
4653 ldev = netdev_lower_get_next(dev, &(iter)); \
4655 ldev = netdev_lower_get_next(dev, &(iter)))
4657 struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
4658 struct list_head **iter);
4659 int netdev_walk_all_lower_dev(struct net_device *dev,
4660 int (*fn)(struct net_device *lower_dev,
4661 struct netdev_nested_priv *priv),
4662 struct netdev_nested_priv *priv);
4663 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4664 int (*fn)(struct net_device *lower_dev,
4665 struct netdev_nested_priv *priv),
4666 struct netdev_nested_priv *priv);
4668 void *netdev_adjacent_get_private(struct list_head *adj_list);
4669 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4670 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4671 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4672 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4673 struct netlink_ext_ack *extack);
4674 int netdev_master_upper_dev_link(struct net_device *dev,
4675 struct net_device *upper_dev,
4676 void *upper_priv, void *upper_info,
4677 struct netlink_ext_ack *extack);
4678 void netdev_upper_dev_unlink(struct net_device *dev,
4679 struct net_device *upper_dev);
4680 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4681 struct net_device *new_dev,
4682 struct net_device *dev,
4683 struct netlink_ext_ack *extack);
4684 void netdev_adjacent_change_commit(struct net_device *old_dev,
4685 struct net_device *new_dev,
4686 struct net_device *dev);
4687 void netdev_adjacent_change_abort(struct net_device *old_dev,
4688 struct net_device *new_dev,
4689 struct net_device *dev);
4690 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4691 void *netdev_lower_dev_get_private(struct net_device *dev,
4692 struct net_device *lower_dev);
4693 void netdev_lower_state_changed(struct net_device *lower_dev,
4694 void *lower_state_info);
4696 /* RSS keys are 40 or 52 bytes long */
4697 #define NETDEV_RSS_KEY_LEN 52
4698 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4699 void netdev_rss_key_fill(void *buffer, size_t len);
4701 int skb_checksum_help(struct sk_buff *skb);
4702 int skb_crc32c_csum_help(struct sk_buff *skb);
4703 int skb_csum_hwoffload_help(struct sk_buff *skb,
4704 const netdev_features_t features);
4706 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4707 netdev_features_t features, bool tx_path);
4708 struct sk_buff *skb_eth_gso_segment(struct sk_buff *skb,
4709 netdev_features_t features, __be16 type);
4710 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4711 netdev_features_t features);
4713 struct netdev_bonding_info {
4718 struct netdev_notifier_bonding_info {
4719 struct netdev_notifier_info info; /* must be first */
4720 struct netdev_bonding_info bonding_info;
4723 void netdev_bonding_info_change(struct net_device *dev,
4724 struct netdev_bonding_info *bonding_info);
4726 #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
4727 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
4729 static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
4736 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4738 return __skb_gso_segment(skb, features, true);
4740 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4742 static inline bool can_checksum_protocol(netdev_features_t features,
4745 if (protocol == htons(ETH_P_FCOE))
4746 return !!(features & NETIF_F_FCOE_CRC);
4748 /* Assume this is an IP checksum (not SCTP CRC) */
4750 if (features & NETIF_F_HW_CSUM) {
4751 /* Can checksum everything */
4756 case htons(ETH_P_IP):
4757 return !!(features & NETIF_F_IP_CSUM);
4758 case htons(ETH_P_IPV6):
4759 return !!(features & NETIF_F_IPV6_CSUM);
4766 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4768 static inline void netdev_rx_csum_fault(struct net_device *dev,
4769 struct sk_buff *skb)
4773 /* rx skb timestamps */
4774 void net_enable_timestamp(void);
4775 void net_disable_timestamp(void);
4777 #ifdef CONFIG_PROC_FS
4778 int __init dev_proc_init(void);
4780 #define dev_proc_init() 0
4783 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4784 struct sk_buff *skb, struct net_device *dev,
4787 __this_cpu_write(softnet_data.xmit.more, more);
4788 return ops->ndo_start_xmit(skb, dev);
4791 static inline bool netdev_xmit_more(void)
4793 return __this_cpu_read(softnet_data.xmit.more);
4796 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4797 struct netdev_queue *txq, bool more)
4799 const struct net_device_ops *ops = dev->netdev_ops;
4802 rc = __netdev_start_xmit(ops, skb, dev, more);
4803 if (rc == NETDEV_TX_OK)
4804 txq_trans_update(txq);
4809 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4811 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4814 extern const struct kobj_ns_type_operations net_ns_type_operations;
4816 const char *netdev_drivername(const struct net_device *dev);
4818 void linkwatch_run_queue(void);
4820 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4821 netdev_features_t f2)
4823 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4824 if (f1 & NETIF_F_HW_CSUM)
4825 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4827 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4833 static inline netdev_features_t netdev_get_wanted_features(
4834 struct net_device *dev)
4836 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4838 netdev_features_t netdev_increment_features(netdev_features_t all,
4839 netdev_features_t one, netdev_features_t mask);
4841 /* Allow TSO being used on stacked device :
4842 * Performing the GSO segmentation before last device
4843 * is a performance improvement.
4845 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4846 netdev_features_t mask)
4848 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4851 int __netdev_update_features(struct net_device *dev);
4852 void netdev_update_features(struct net_device *dev);
4853 void netdev_change_features(struct net_device *dev);
4855 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4856 struct net_device *dev);
4858 netdev_features_t passthru_features_check(struct sk_buff *skb,
4859 struct net_device *dev,
4860 netdev_features_t features);
4861 netdev_features_t netif_skb_features(struct sk_buff *skb);
4863 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4865 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4867 /* check flags correspondence */
4868 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4869 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4870 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4871 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4872 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4873 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4874 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4875 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4876 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4877 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4878 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4879 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4880 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4881 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4882 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4883 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4884 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4885 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4886 BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));
4888 return (features & feature) == feature;
4891 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4893 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4894 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4897 static inline bool netif_needs_gso(struct sk_buff *skb,
4898 netdev_features_t features)
4900 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4901 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4902 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4905 static inline void netif_set_gso_max_size(struct net_device *dev,
4908 /* dev->gso_max_size is read locklessly from sk_setup_caps() */
4909 WRITE_ONCE(dev->gso_max_size, size);
4912 static inline void netif_set_gso_max_segs(struct net_device *dev,
4915 /* dev->gso_max_segs is read locklessly from sk_setup_caps() */
4916 WRITE_ONCE(dev->gso_max_segs, segs);
4919 static inline void netif_set_gro_max_size(struct net_device *dev,
4922 /* This pairs with the READ_ONCE() in skb_gro_receive() */
4923 WRITE_ONCE(dev->gro_max_size, size);
4926 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4927 int pulled_hlen, u16 mac_offset,
4930 skb->protocol = protocol;
4931 skb->encapsulation = 1;
4932 skb_push(skb, pulled_hlen);
4933 skb_reset_transport_header(skb);
4934 skb->mac_header = mac_offset;
4935 skb->network_header = skb->mac_header + mac_len;
4936 skb->mac_len = mac_len;
4939 static inline bool netif_is_macsec(const struct net_device *dev)
4941 return dev->priv_flags & IFF_MACSEC;
4944 static inline bool netif_is_macvlan(const struct net_device *dev)
4946 return dev->priv_flags & IFF_MACVLAN;
4949 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4951 return dev->priv_flags & IFF_MACVLAN_PORT;
4954 static inline bool netif_is_bond_master(const struct net_device *dev)
4956 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4959 static inline bool netif_is_bond_slave(const struct net_device *dev)
4961 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4964 static inline bool netif_supports_nofcs(struct net_device *dev)
4966 return dev->priv_flags & IFF_SUPP_NOFCS;
4969 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4971 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4974 static inline bool netif_is_l3_master(const struct net_device *dev)
4976 return dev->priv_flags & IFF_L3MDEV_MASTER;
4979 static inline bool netif_is_l3_slave(const struct net_device *dev)
4981 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4984 static inline bool netif_is_bridge_master(const struct net_device *dev)
4986 return dev->priv_flags & IFF_EBRIDGE;
4989 static inline bool netif_is_bridge_port(const struct net_device *dev)
4991 return dev->priv_flags & IFF_BRIDGE_PORT;
4994 static inline bool netif_is_ovs_master(const struct net_device *dev)
4996 return dev->priv_flags & IFF_OPENVSWITCH;
4999 static inline bool netif_is_ovs_port(const struct net_device *dev)
5001 return dev->priv_flags & IFF_OVS_DATAPATH;
5004 static inline bool netif_is_any_bridge_port(const struct net_device *dev)
5006 return netif_is_bridge_port(dev) || netif_is_ovs_port(dev);
5009 static inline bool netif_is_team_master(const struct net_device *dev)
5011 return dev->priv_flags & IFF_TEAM;
5014 static inline bool netif_is_team_port(const struct net_device *dev)
5016 return dev->priv_flags & IFF_TEAM_PORT;
5019 static inline bool netif_is_lag_master(const struct net_device *dev)
5021 return netif_is_bond_master(dev) || netif_is_team_master(dev);
5024 static inline bool netif_is_lag_port(const struct net_device *dev)
5026 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
5029 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
5031 return dev->priv_flags & IFF_RXFH_CONFIGURED;
5034 static inline bool netif_is_failover(const struct net_device *dev)
5036 return dev->priv_flags & IFF_FAILOVER;
5039 static inline bool netif_is_failover_slave(const struct net_device *dev)
5041 return dev->priv_flags & IFF_FAILOVER_SLAVE;
5044 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
5045 static inline void netif_keep_dst(struct net_device *dev)
5047 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
5050 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
5051 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
5053 /* TODO: reserve and use an additional IFF bit, if we get more users */
5054 return netif_is_macsec(dev);
5057 extern struct pernet_operations __net_initdata loopback_net_ops;
5059 /* Logging, debugging and troubleshooting/diagnostic helpers. */
5061 /* netdev_printk helpers, similar to dev_printk */
5063 static inline const char *netdev_name(const struct net_device *dev)
5065 if (!dev->name[0] || strchr(dev->name, '%'))
5066 return "(unnamed net_device)";
5070 static inline bool netdev_unregistering(const struct net_device *dev)
5072 return dev->reg_state == NETREG_UNREGISTERING;
5075 static inline const char *netdev_reg_state(const struct net_device *dev)
5077 switch (dev->reg_state) {
5078 case NETREG_UNINITIALIZED: return " (uninitialized)";
5079 case NETREG_REGISTERED: return "";
5080 case NETREG_UNREGISTERING: return " (unregistering)";
5081 case NETREG_UNREGISTERED: return " (unregistered)";
5082 case NETREG_RELEASED: return " (released)";
5083 case NETREG_DUMMY: return " (dummy)";
5086 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
5087 return " (unknown)";
5090 __printf(3, 4) __cold
5091 void netdev_printk(const char *level, const struct net_device *dev,
5092 const char *format, ...);
5093 __printf(2, 3) __cold
5094 void netdev_emerg(const struct net_device *dev, const char *format, ...);
5095 __printf(2, 3) __cold
5096 void netdev_alert(const struct net_device *dev, const char *format, ...);
5097 __printf(2, 3) __cold
5098 void netdev_crit(const struct net_device *dev, const char *format, ...);
5099 __printf(2, 3) __cold
5100 void netdev_err(const struct net_device *dev, const char *format, ...);
5101 __printf(2, 3) __cold
5102 void netdev_warn(const struct net_device *dev, const char *format, ...);
5103 __printf(2, 3) __cold
5104 void netdev_notice(const struct net_device *dev, const char *format, ...);
5105 __printf(2, 3) __cold
5106 void netdev_info(const struct net_device *dev, const char *format, ...);
5108 #define netdev_level_once(level, dev, fmt, ...) \
5110 static bool __section(".data.once") __print_once; \
5112 if (!__print_once) { \
5113 __print_once = true; \
5114 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
5118 #define netdev_emerg_once(dev, fmt, ...) \
5119 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
5120 #define netdev_alert_once(dev, fmt, ...) \
5121 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
5122 #define netdev_crit_once(dev, fmt, ...) \
5123 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
5124 #define netdev_err_once(dev, fmt, ...) \
5125 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
5126 #define netdev_warn_once(dev, fmt, ...) \
5127 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
5128 #define netdev_notice_once(dev, fmt, ...) \
5129 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
5130 #define netdev_info_once(dev, fmt, ...) \
5131 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
5133 #define MODULE_ALIAS_NETDEV(device) \
5134 MODULE_ALIAS("netdev-" device)
5136 #if defined(CONFIG_DYNAMIC_DEBUG) || \
5137 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
5138 #define netdev_dbg(__dev, format, args...) \
5140 dynamic_netdev_dbg(__dev, format, ##args); \
5142 #elif defined(DEBUG)
5143 #define netdev_dbg(__dev, format, args...) \
5144 netdev_printk(KERN_DEBUG, __dev, format, ##args)
5146 #define netdev_dbg(__dev, format, args...) \
5149 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
5153 #if defined(VERBOSE_DEBUG)
5154 #define netdev_vdbg netdev_dbg
5157 #define netdev_vdbg(dev, format, args...) \
5160 netdev_printk(KERN_DEBUG, dev, format, ##args); \
5166 * netdev_WARN() acts like dev_printk(), but with the key difference
5167 * of using a WARN/WARN_ON to get the message out, including the
5168 * file/line information and a backtrace.
5170 #define netdev_WARN(dev, format, args...) \
5171 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
5172 netdev_reg_state(dev), ##args)
5174 #define netdev_WARN_ONCE(dev, format, args...) \
5175 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
5176 netdev_reg_state(dev), ##args)
5178 /* netif printk helpers, similar to netdev_printk */
5180 #define netif_printk(priv, type, level, dev, fmt, args...) \
5182 if (netif_msg_##type(priv)) \
5183 netdev_printk(level, (dev), fmt, ##args); \
5186 #define netif_level(level, priv, type, dev, fmt, args...) \
5188 if (netif_msg_##type(priv)) \
5189 netdev_##level(dev, fmt, ##args); \
5192 #define netif_emerg(priv, type, dev, fmt, args...) \
5193 netif_level(emerg, priv, type, dev, fmt, ##args)
5194 #define netif_alert(priv, type, dev, fmt, args...) \
5195 netif_level(alert, priv, type, dev, fmt, ##args)
5196 #define netif_crit(priv, type, dev, fmt, args...) \
5197 netif_level(crit, priv, type, dev, fmt, ##args)
5198 #define netif_err(priv, type, dev, fmt, args...) \
5199 netif_level(err, priv, type, dev, fmt, ##args)
5200 #define netif_warn(priv, type, dev, fmt, args...) \
5201 netif_level(warn, priv, type, dev, fmt, ##args)
5202 #define netif_notice(priv, type, dev, fmt, args...) \
5203 netif_level(notice, priv, type, dev, fmt, ##args)
5204 #define netif_info(priv, type, dev, fmt, args...) \
5205 netif_level(info, priv, type, dev, fmt, ##args)
5207 #if defined(CONFIG_DYNAMIC_DEBUG) || \
5208 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
5209 #define netif_dbg(priv, type, netdev, format, args...) \
5211 if (netif_msg_##type(priv)) \
5212 dynamic_netdev_dbg(netdev, format, ##args); \
5214 #elif defined(DEBUG)
5215 #define netif_dbg(priv, type, dev, format, args...) \
5216 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
5218 #define netif_dbg(priv, type, dev, format, args...) \
5221 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5226 /* if @cond then downgrade to debug, else print at @level */
5227 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
5230 netif_dbg(priv, type, netdev, fmt, ##args); \
5232 netif_ ## level(priv, type, netdev, fmt, ##args); \
5235 #if defined(VERBOSE_DEBUG)
5236 #define netif_vdbg netif_dbg
5238 #define netif_vdbg(priv, type, dev, format, args...) \
5241 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5247 * The list of packet types we will receive (as opposed to discard)
5248 * and the routines to invoke.
5250 * Why 16. Because with 16 the only overlap we get on a hash of the
5251 * low nibble of the protocol value is RARP/SNAP/X.25.
5265 #define PTYPE_HASH_SIZE (16)
5266 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
5268 extern struct list_head ptype_all __read_mostly;
5269 extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
5271 extern struct net_device *blackhole_netdev;
5273 #endif /* _LINUX_NETDEVICE_H */