2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/timer.h>
29 #include <linux/bug.h>
30 #include <linux/delay.h>
31 #include <linux/atomic.h>
32 #include <linux/prefetch.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/workqueue.h>
39 #include <linux/dynamic_queue_limits.h>
41 #include <linux/ethtool.h>
42 #include <net/net_namespace.h>
44 #include <net/dcbnl.h>
46 #include <net/netprio_cgroup.h>
49 #include <linux/netdev_features.h>
50 #include <linux/neighbour.h>
51 #include <uapi/linux/netdevice.h>
52 #include <uapi/linux/if_bonding.h>
53 #include <uapi/linux/pkt_cls.h>
54 #include <linux/hashtable.h>
64 /* 802.15.4 specific */
67 /* UDP Tunnel offloads */
68 struct udp_tunnel_info;
72 void netdev_set_default_ethtool_ops(struct net_device *dev,
73 const struct ethtool_ops *ops);
75 /* Backlog congestion levels */
76 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
77 #define NET_RX_DROP 1 /* packet dropped */
80 * Transmit return codes: transmit return codes originate from three different
83 * - qdisc return codes
84 * - driver transmit return codes
87 * Drivers are allowed to return any one of those in their hard_start_xmit()
88 * function. Real network devices commonly used with qdiscs should only return
89 * the driver transmit return codes though - when qdiscs are used, the actual
90 * transmission happens asynchronously, so the value is not propagated to
91 * higher layers. Virtual network devices transmit synchronously; in this case
92 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
93 * others are propagated to higher layers.
96 /* qdisc ->enqueue() return codes. */
97 #define NET_XMIT_SUCCESS 0x00
98 #define NET_XMIT_DROP 0x01 /* skb dropped */
99 #define NET_XMIT_CN 0x02 /* congestion notification */
100 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
102 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
103 * indicates that the device will soon be dropping packets, or already drops
104 * some packets of the same priority; prompting us to send less aggressively. */
105 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
106 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
108 /* Driver transmit return codes */
109 #define NETDEV_TX_MASK 0xf0
112 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
113 NETDEV_TX_OK = 0x00, /* driver took care of packet */
114 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
116 typedef enum netdev_tx netdev_tx_t;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc < NET_XMIT_MASK))
137 * Compute the worst-case header length according to the protocols
141 #if defined(CONFIG_HYPERV_NET)
142 # define LL_MAX_HEADER 128
143 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
144 # if defined(CONFIG_MAC80211_MESH)
145 # define LL_MAX_HEADER 128
147 # define LL_MAX_HEADER 96
150 # define LL_MAX_HEADER 32
153 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
154 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
155 #define MAX_HEADER LL_MAX_HEADER
157 #define MAX_HEADER (LL_MAX_HEADER + 48)
161 * Old network device statistics. Fields are native words
162 * (unsigned long) so they can be read and written atomically.
165 struct net_device_stats {
166 unsigned long rx_packets;
167 unsigned long tx_packets;
168 unsigned long rx_bytes;
169 unsigned long tx_bytes;
170 unsigned long rx_errors;
171 unsigned long tx_errors;
172 unsigned long rx_dropped;
173 unsigned long tx_dropped;
174 unsigned long multicast;
175 unsigned long collisions;
176 unsigned long rx_length_errors;
177 unsigned long rx_over_errors;
178 unsigned long rx_crc_errors;
179 unsigned long rx_frame_errors;
180 unsigned long rx_fifo_errors;
181 unsigned long rx_missed_errors;
182 unsigned long tx_aborted_errors;
183 unsigned long tx_carrier_errors;
184 unsigned long tx_fifo_errors;
185 unsigned long tx_heartbeat_errors;
186 unsigned long tx_window_errors;
187 unsigned long rx_compressed;
188 unsigned long tx_compressed;
192 #include <linux/cache.h>
193 #include <linux/skbuff.h>
196 #include <linux/static_key.h>
197 extern struct static_key_false rps_needed;
198 extern struct static_key_false rfs_needed;
205 struct netdev_hw_addr {
206 struct list_head list;
207 unsigned char addr[MAX_ADDR_LEN];
209 #define NETDEV_HW_ADDR_T_LAN 1
210 #define NETDEV_HW_ADDR_T_SAN 2
211 #define NETDEV_HW_ADDR_T_SLAVE 3
212 #define NETDEV_HW_ADDR_T_UNICAST 4
213 #define NETDEV_HW_ADDR_T_MULTICAST 5
218 struct rcu_head rcu_head;
221 struct netdev_hw_addr_list {
222 struct list_head list;
226 #define netdev_hw_addr_list_count(l) ((l)->count)
227 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
228 #define netdev_hw_addr_list_for_each(ha, l) \
229 list_for_each_entry(ha, &(l)->list, list)
231 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
232 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
233 #define netdev_for_each_uc_addr(ha, dev) \
234 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
236 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
237 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
238 #define netdev_for_each_mc_addr(ha, dev) \
239 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
245 /* cached hardware header; allow for machine alignment needs. */
246 #define HH_DATA_MOD 16
247 #define HH_DATA_OFF(__len) \
248 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
249 #define HH_DATA_ALIGN(__len) \
250 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
251 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
254 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
256 * dev->hard_header_len ? (dev->hard_header_len +
257 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
259 * We could use other alignment values, but we must maintain the
260 * relationship HH alignment <= LL alignment.
262 #define LL_RESERVED_SPACE(dev) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
265 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
268 int (*create) (struct sk_buff *skb, struct net_device *dev,
269 unsigned short type, const void *daddr,
270 const void *saddr, unsigned int len);
271 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
272 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
273 void (*cache_update)(struct hh_cache *hh,
274 const struct net_device *dev,
275 const unsigned char *haddr);
276 bool (*validate)(const char *ll_header, unsigned int len);
277 __be16 (*parse_protocol)(const struct sk_buff *skb);
280 /* These flag bits are private to the generic network queueing
281 * layer; they may not be explicitly referenced by any other
285 enum netdev_state_t {
287 __LINK_STATE_PRESENT,
288 __LINK_STATE_NOCARRIER,
289 __LINK_STATE_LINKWATCH_PENDING,
290 __LINK_STATE_DORMANT,
295 * This structure holds boot-time configured netdevice settings. They
296 * are then used in the device probing.
298 struct netdev_boot_setup {
302 #define NETDEV_BOOT_SETUP_MAX 8
304 int __init netdev_boot_setup(char *str);
307 struct list_head list;
312 * size of gro hash buckets, must less than bit number of
313 * napi_struct::gro_bitmask
315 #define GRO_HASH_BUCKETS 8
318 * Structure for NAPI scheduling similar to tasklet but with weighting
321 /* The poll_list must only be managed by the entity which
322 * changes the state of the NAPI_STATE_SCHED bit. This means
323 * whoever atomically sets that bit can add this napi_struct
324 * to the per-CPU poll_list, and whoever clears that bit
325 * can remove from the list right before clearing the bit.
327 struct list_head poll_list;
331 unsigned long gro_bitmask;
332 int (*poll)(struct napi_struct *, int);
333 #ifdef CONFIG_NETPOLL
336 struct net_device *dev;
337 struct gro_list gro_hash[GRO_HASH_BUCKETS];
339 struct hrtimer timer;
340 struct list_head dev_list;
341 struct hlist_node napi_hash_node;
342 unsigned int napi_id;
346 NAPI_STATE_SCHED, /* Poll is scheduled */
347 NAPI_STATE_MISSED, /* reschedule a napi */
348 NAPI_STATE_DISABLE, /* Disable pending */
349 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
350 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
351 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
352 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
356 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
357 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
358 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
359 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
360 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
361 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
362 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
373 typedef enum gro_result gro_result_t;
376 * enum rx_handler_result - Possible return values for rx_handlers.
377 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
379 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
380 * case skb->dev was changed by rx_handler.
381 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
382 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
384 * rx_handlers are functions called from inside __netif_receive_skb(), to do
385 * special processing of the skb, prior to delivery to protocol handlers.
387 * Currently, a net_device can only have a single rx_handler registered. Trying
388 * to register a second rx_handler will return -EBUSY.
390 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
391 * To unregister a rx_handler on a net_device, use
392 * netdev_rx_handler_unregister().
394 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
397 * If the rx_handler consumed the skb in some way, it should return
398 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
399 * the skb to be delivered in some other way.
401 * If the rx_handler changed skb->dev, to divert the skb to another
402 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
403 * new device will be called if it exists.
405 * If the rx_handler decides the skb should be ignored, it should return
406 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
407 * are registered on exact device (ptype->dev == skb->dev).
409 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
410 * delivered, it should return RX_HANDLER_PASS.
412 * A device without a registered rx_handler will behave as if rx_handler
413 * returned RX_HANDLER_PASS.
416 enum rx_handler_result {
422 typedef enum rx_handler_result rx_handler_result_t;
423 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
425 void __napi_schedule(struct napi_struct *n);
426 void __napi_schedule_irqoff(struct napi_struct *n);
428 static inline bool napi_disable_pending(struct napi_struct *n)
430 return test_bit(NAPI_STATE_DISABLE, &n->state);
433 bool napi_schedule_prep(struct napi_struct *n);
436 * napi_schedule - schedule NAPI poll
439 * Schedule NAPI poll routine to be called if it is not already
442 static inline void napi_schedule(struct napi_struct *n)
444 if (napi_schedule_prep(n))
449 * napi_schedule_irqoff - schedule NAPI poll
452 * Variant of napi_schedule(), assuming hard irqs are masked.
454 static inline void napi_schedule_irqoff(struct napi_struct *n)
456 if (napi_schedule_prep(n))
457 __napi_schedule_irqoff(n);
460 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
461 static inline bool napi_reschedule(struct napi_struct *napi)
463 if (napi_schedule_prep(napi)) {
464 __napi_schedule(napi);
470 bool napi_complete_done(struct napi_struct *n, int work_done);
472 * napi_complete - NAPI processing complete
475 * Mark NAPI processing as complete.
476 * Consider using napi_complete_done() instead.
477 * Return false if device should avoid rearming interrupts.
479 static inline bool napi_complete(struct napi_struct *n)
481 return napi_complete_done(n, 0);
485 * napi_hash_del - remove a NAPI from global table
486 * @napi: NAPI context
488 * Warning: caller must observe RCU grace period
489 * before freeing memory containing @napi, if
490 * this function returns true.
491 * Note: core networking stack automatically calls it
492 * from netif_napi_del().
493 * Drivers might want to call this helper to combine all
494 * the needed RCU grace periods into a single one.
496 bool napi_hash_del(struct napi_struct *napi);
499 * napi_disable - prevent NAPI from scheduling
502 * Stop NAPI from being scheduled on this context.
503 * Waits till any outstanding processing completes.
505 void napi_disable(struct napi_struct *n);
508 * napi_enable - enable NAPI scheduling
511 * Resume NAPI from being scheduled on this context.
512 * Must be paired with napi_disable.
514 static inline void napi_enable(struct napi_struct *n)
516 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
517 smp_mb__before_atomic();
518 clear_bit(NAPI_STATE_SCHED, &n->state);
519 clear_bit(NAPI_STATE_NPSVC, &n->state);
523 * napi_synchronize - wait until NAPI is not running
526 * Wait until NAPI is done being scheduled on this context.
527 * Waits till any outstanding processing completes but
528 * does not disable future activations.
530 static inline void napi_synchronize(const struct napi_struct *n)
532 if (IS_ENABLED(CONFIG_SMP))
533 while (test_bit(NAPI_STATE_SCHED, &n->state))
540 * napi_if_scheduled_mark_missed - if napi is running, set the
544 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
547 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
549 unsigned long val, new;
552 val = READ_ONCE(n->state);
553 if (val & NAPIF_STATE_DISABLE)
556 if (!(val & NAPIF_STATE_SCHED))
559 new = val | NAPIF_STATE_MISSED;
560 } while (cmpxchg(&n->state, val, new) != val);
565 enum netdev_queue_state_t {
566 __QUEUE_STATE_DRV_XOFF,
567 __QUEUE_STATE_STACK_XOFF,
568 __QUEUE_STATE_FROZEN,
571 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
572 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
573 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
575 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
576 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
578 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
582 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
583 * netif_tx_* functions below are used to manipulate this flag. The
584 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
585 * queue independently. The netif_xmit_*stopped functions below are called
586 * to check if the queue has been stopped by the driver or stack (either
587 * of the XOFF bits are set in the state). Drivers should not need to call
588 * netif_xmit*stopped functions, they should only be using netif_tx_*.
591 struct netdev_queue {
595 struct net_device *dev;
596 struct Qdisc __rcu *qdisc;
597 struct Qdisc *qdisc_sleeping;
601 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
604 unsigned long tx_maxrate;
606 * Number of TX timeouts for this queue
607 * (/sys/class/net/DEV/Q/trans_timeout)
609 unsigned long trans_timeout;
611 /* Subordinate device that the queue has been assigned to */
612 struct net_device *sb_dev;
613 #ifdef CONFIG_XDP_SOCKETS
614 struct xdp_umem *umem;
619 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
622 * Time (in jiffies) of last Tx
624 unsigned long trans_start;
631 } ____cacheline_aligned_in_smp;
633 extern int sysctl_fb_tunnels_only_for_init_net;
634 extern int sysctl_devconf_inherit_init_net;
636 static inline bool net_has_fallback_tunnels(const struct net *net)
638 return net == &init_net ||
639 !IS_ENABLED(CONFIG_SYSCTL) ||
640 !sysctl_fb_tunnels_only_for_init_net;
643 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
645 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
652 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
654 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
661 * This structure holds an RPS map which can be of variable length. The
662 * map is an array of CPUs.
669 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
672 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
673 * tail pointer for that CPU's input queue at the time of last enqueue, and
674 * a hardware filter index.
676 struct rps_dev_flow {
679 unsigned int last_qtail;
681 #define RPS_NO_FILTER 0xffff
684 * The rps_dev_flow_table structure contains a table of flow mappings.
686 struct rps_dev_flow_table {
689 struct rps_dev_flow flows[0];
691 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
692 ((_num) * sizeof(struct rps_dev_flow)))
695 * The rps_sock_flow_table contains mappings of flows to the last CPU
696 * on which they were processed by the application (set in recvmsg).
697 * Each entry is a 32bit value. Upper part is the high-order bits
698 * of flow hash, lower part is CPU number.
699 * rps_cpu_mask is used to partition the space, depending on number of
700 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
701 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
702 * meaning we use 32-6=26 bits for the hash.
704 struct rps_sock_flow_table {
707 u32 ents[0] ____cacheline_aligned_in_smp;
709 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
711 #define RPS_NO_CPU 0xffff
713 extern u32 rps_cpu_mask;
714 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
716 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
720 unsigned int index = hash & table->mask;
721 u32 val = hash & ~rps_cpu_mask;
723 /* We only give a hint, preemption can change CPU under us */
724 val |= raw_smp_processor_id();
726 if (table->ents[index] != val)
727 table->ents[index] = val;
731 #ifdef CONFIG_RFS_ACCEL
732 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
735 #endif /* CONFIG_RPS */
737 /* This structure contains an instance of an RX queue. */
738 struct netdev_rx_queue {
740 struct rps_map __rcu *rps_map;
741 struct rps_dev_flow_table __rcu *rps_flow_table;
744 struct net_device *dev;
745 struct xdp_rxq_info xdp_rxq;
746 #ifdef CONFIG_XDP_SOCKETS
747 struct xdp_umem *umem;
749 } ____cacheline_aligned_in_smp;
752 * RX queue sysfs structures and functions.
754 struct rx_queue_attribute {
755 struct attribute attr;
756 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
757 ssize_t (*store)(struct netdev_rx_queue *queue,
758 const char *buf, size_t len);
763 * This structure holds an XPS map which can be of variable length. The
764 * map is an array of queues.
768 unsigned int alloc_len;
772 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
773 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
774 - sizeof(struct xps_map)) / sizeof(u16))
777 * This structure holds all XPS maps for device. Maps are indexed by CPU.
779 struct xps_dev_maps {
781 struct xps_map __rcu *attr_map[0]; /* Either CPUs map or RXQs map */
784 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
785 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
787 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
788 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
790 #endif /* CONFIG_XPS */
792 #define TC_MAX_QUEUE 16
793 #define TC_BITMASK 15
794 /* HW offloaded queuing disciplines txq count and offset maps */
795 struct netdev_tc_txq {
800 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
802 * This structure is to hold information about the device
803 * configured to run FCoE protocol stack.
805 struct netdev_fcoe_hbainfo {
806 char manufacturer[64];
807 char serial_number[64];
808 char hardware_version[64];
809 char driver_version[64];
810 char optionrom_version[64];
811 char firmware_version[64];
813 char model_description[256];
817 #define MAX_PHYS_ITEM_ID_LEN 32
819 /* This structure holds a unique identifier to identify some
820 * physical item (port for example) used by a netdevice.
822 struct netdev_phys_item_id {
823 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
824 unsigned char id_len;
827 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
828 struct netdev_phys_item_id *b)
830 return a->id_len == b->id_len &&
831 memcmp(a->id, b->id, a->id_len) == 0;
834 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
836 struct net_device *sb_dev);
839 TC_SETUP_QDISC_MQPRIO,
842 TC_SETUP_CLSMATCHALL,
854 /* These structures hold the attributes of bpf state that are being passed
855 * to the netdevice through the bpf op.
857 enum bpf_netdev_command {
858 /* Set or clear a bpf program used in the earliest stages of packet
859 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
860 * is responsible for calling bpf_prog_put on any old progs that are
861 * stored. In case of error, the callee need not release the new prog
862 * reference, but on success it takes ownership and must bpf_prog_put
863 * when it is no longer used.
869 /* BPF program for offload callbacks, invoked at program load time. */
870 BPF_OFFLOAD_MAP_ALLOC,
871 BPF_OFFLOAD_MAP_FREE,
875 struct bpf_prog_offload_ops;
876 struct netlink_ext_ack;
880 enum bpf_netdev_command command;
885 struct bpf_prog *prog;
886 struct netlink_ext_ack *extack;
888 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
891 /* flags with which program was installed */
894 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
896 struct bpf_offloaded_map *offmap;
898 /* XDP_SETUP_XSK_UMEM */
900 struct xdp_umem *umem;
906 #ifdef CONFIG_XFRM_OFFLOAD
908 int (*xdo_dev_state_add) (struct xfrm_state *x);
909 void (*xdo_dev_state_delete) (struct xfrm_state *x);
910 void (*xdo_dev_state_free) (struct xfrm_state *x);
911 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
912 struct xfrm_state *x);
913 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
918 struct rcu_head rcuhead;
926 * This structure defines the management hooks for network devices.
927 * The following hooks can be defined; unless noted otherwise, they are
928 * optional and can be filled with a null pointer.
930 * int (*ndo_init)(struct net_device *dev);
931 * This function is called once when a network device is registered.
932 * The network device can use this for any late stage initialization
933 * or semantic validation. It can fail with an error code which will
934 * be propagated back to register_netdev.
936 * void (*ndo_uninit)(struct net_device *dev);
937 * This function is called when device is unregistered or when registration
938 * fails. It is not called if init fails.
940 * int (*ndo_open)(struct net_device *dev);
941 * This function is called when a network device transitions to the up
944 * int (*ndo_stop)(struct net_device *dev);
945 * This function is called when a network device transitions to the down
948 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
949 * struct net_device *dev);
950 * Called when a packet needs to be transmitted.
951 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
952 * the queue before that can happen; it's for obsolete devices and weird
953 * corner cases, but the stack really does a non-trivial amount
954 * of useless work if you return NETDEV_TX_BUSY.
955 * Required; cannot be NULL.
957 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
958 * struct net_device *dev
959 * netdev_features_t features);
960 * Called by core transmit path to determine if device is capable of
961 * performing offload operations on a given packet. This is to give
962 * the device an opportunity to implement any restrictions that cannot
963 * be otherwise expressed by feature flags. The check is called with
964 * the set of features that the stack has calculated and it returns
965 * those the driver believes to be appropriate.
967 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
968 * struct net_device *sb_dev);
969 * Called to decide which queue to use when device supports multiple
972 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
973 * This function is called to allow device receiver to make
974 * changes to configuration when multicast or promiscuous is enabled.
976 * void (*ndo_set_rx_mode)(struct net_device *dev);
977 * This function is called device changes address list filtering.
978 * If driver handles unicast address filtering, it should set
979 * IFF_UNICAST_FLT in its priv_flags.
981 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
982 * This function is called when the Media Access Control address
983 * needs to be changed. If this interface is not defined, the
984 * MAC address can not be changed.
986 * int (*ndo_validate_addr)(struct net_device *dev);
987 * Test if Media Access Control address is valid for the device.
989 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
990 * Called when a user requests an ioctl which can't be handled by
991 * the generic interface code. If not defined ioctls return
992 * not supported error code.
994 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
995 * Used to set network devices bus interface parameters. This interface
996 * is retained for legacy reasons; new devices should use the bus
997 * interface (PCI) for low level management.
999 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1000 * Called when a user wants to change the Maximum Transfer Unit
1003 * void (*ndo_tx_timeout)(struct net_device *dev);
1004 * Callback used when the transmitter has not made any progress
1005 * for dev->watchdog ticks.
1007 * void (*ndo_get_stats64)(struct net_device *dev,
1008 * struct rtnl_link_stats64 *storage);
1009 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1010 * Called when a user wants to get the network device usage
1011 * statistics. Drivers must do one of the following:
1012 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1013 * rtnl_link_stats64 structure passed by the caller.
1014 * 2. Define @ndo_get_stats to update a net_device_stats structure
1015 * (which should normally be dev->stats) and return a pointer to
1016 * it. The structure may be changed asynchronously only if each
1017 * field is written atomically.
1018 * 3. Update dev->stats asynchronously and atomically, and define
1019 * neither operation.
1021 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1022 * Return true if this device supports offload stats of this attr_id.
1024 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1026 * Get statistics for offload operations by attr_id. Write it into the
1027 * attr_data pointer.
1029 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1030 * If device supports VLAN filtering this function is called when a
1031 * VLAN id is registered.
1033 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1034 * If device supports VLAN filtering this function is called when a
1035 * VLAN id is unregistered.
1037 * void (*ndo_poll_controller)(struct net_device *dev);
1039 * SR-IOV management functions.
1040 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1041 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1042 * u8 qos, __be16 proto);
1043 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1045 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1046 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1047 * int (*ndo_get_vf_config)(struct net_device *dev,
1048 * int vf, struct ifla_vf_info *ivf);
1049 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1050 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1051 * struct nlattr *port[]);
1053 * Enable or disable the VF ability to query its RSS Redirection Table and
1054 * Hash Key. This is needed since on some devices VF share this information
1055 * with PF and querying it may introduce a theoretical security risk.
1056 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1057 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1058 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1060 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1061 * This is always called from the stack with the rtnl lock held and netif
1062 * tx queues stopped. This allows the netdevice to perform queue
1063 * management safely.
1065 * Fiber Channel over Ethernet (FCoE) offload functions.
1066 * int (*ndo_fcoe_enable)(struct net_device *dev);
1067 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1068 * so the underlying device can perform whatever needed configuration or
1069 * initialization to support acceleration of FCoE traffic.
1071 * int (*ndo_fcoe_disable)(struct net_device *dev);
1072 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1073 * so the underlying device can perform whatever needed clean-ups to
1074 * stop supporting acceleration of FCoE traffic.
1076 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1077 * struct scatterlist *sgl, unsigned int sgc);
1078 * Called when the FCoE Initiator wants to initialize an I/O that
1079 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1080 * perform necessary setup and returns 1 to indicate the device is set up
1081 * successfully to perform DDP on this I/O, otherwise this returns 0.
1083 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1084 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1085 * indicated by the FC exchange id 'xid', so the underlying device can
1086 * clean up and reuse resources for later DDP requests.
1088 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1089 * struct scatterlist *sgl, unsigned int sgc);
1090 * Called when the FCoE Target wants to initialize an I/O that
1091 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1092 * perform necessary setup and returns 1 to indicate the device is set up
1093 * successfully to perform DDP on this I/O, otherwise this returns 0.
1095 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1096 * struct netdev_fcoe_hbainfo *hbainfo);
1097 * Called when the FCoE Protocol stack wants information on the underlying
1098 * device. This information is utilized by the FCoE protocol stack to
1099 * register attributes with Fiber Channel management service as per the
1100 * FC-GS Fabric Device Management Information(FDMI) specification.
1102 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1103 * Called when the underlying device wants to override default World Wide
1104 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1105 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1106 * protocol stack to use.
1109 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1110 * u16 rxq_index, u32 flow_id);
1111 * Set hardware filter for RFS. rxq_index is the target queue index;
1112 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1113 * Return the filter ID on success, or a negative error code.
1115 * Slave management functions (for bridge, bonding, etc).
1116 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1117 * Called to make another netdev an underling.
1119 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1120 * Called to release previously enslaved netdev.
1122 * Feature/offload setting functions.
1123 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1124 * netdev_features_t features);
1125 * Adjusts the requested feature flags according to device-specific
1126 * constraints, and returns the resulting flags. Must not modify
1129 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1130 * Called to update device configuration to new features. Passed
1131 * feature set might be less than what was returned by ndo_fix_features()).
1132 * Must return >0 or -errno if it changed dev->features itself.
1134 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1135 * struct net_device *dev,
1136 * const unsigned char *addr, u16 vid, u16 flags,
1137 * struct netlink_ext_ack *extack);
1138 * Adds an FDB entry to dev for addr.
1139 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1140 * struct net_device *dev,
1141 * const unsigned char *addr, u16 vid)
1142 * Deletes the FDB entry from dev coresponding to addr.
1143 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1144 * struct net_device *dev, struct net_device *filter_dev,
1146 * Used to add FDB entries to dump requests. Implementers should add
1147 * entries to skb and update idx with the number of entries.
1149 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1150 * u16 flags, struct netlink_ext_ack *extack)
1151 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1152 * struct net_device *dev, u32 filter_mask,
1154 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1157 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1158 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1159 * which do not represent real hardware may define this to allow their
1160 * userspace components to manage their virtual carrier state. Devices
1161 * that determine carrier state from physical hardware properties (eg
1162 * network cables) or protocol-dependent mechanisms (eg
1163 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1165 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1166 * struct netdev_phys_item_id *ppid);
1167 * Called to get ID of physical port of this device. If driver does
1168 * not implement this, it is assumed that the hw is not able to have
1169 * multiple net devices on single physical port.
1171 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1172 * struct netdev_phys_item_id *ppid)
1173 * Called to get the parent ID of the physical port of this device.
1175 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1176 * struct udp_tunnel_info *ti);
1177 * Called by UDP tunnel to notify a driver about the UDP port and socket
1178 * address family that a UDP tunnel is listnening to. It is called only
1179 * when a new port starts listening. The operation is protected by the
1182 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1183 * struct udp_tunnel_info *ti);
1184 * Called by UDP tunnel to notify the driver about a UDP port and socket
1185 * address family that the UDP tunnel is not listening to anymore. The
1186 * operation is protected by the RTNL.
1188 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1189 * struct net_device *dev)
1190 * Called by upper layer devices to accelerate switching or other
1191 * station functionality into hardware. 'pdev is the lowerdev
1192 * to use for the offload and 'dev' is the net device that will
1193 * back the offload. Returns a pointer to the private structure
1194 * the upper layer will maintain.
1195 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1196 * Called by upper layer device to delete the station created
1197 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1198 * the station and priv is the structure returned by the add
1200 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1201 * int queue_index, u32 maxrate);
1202 * Called when a user wants to set a max-rate limitation of specific
1204 * int (*ndo_get_iflink)(const struct net_device *dev);
1205 * Called to get the iflink value of this device.
1206 * void (*ndo_change_proto_down)(struct net_device *dev,
1208 * This function is used to pass protocol port error state information
1209 * to the switch driver. The switch driver can react to the proto_down
1210 * by doing a phys down on the associated switch port.
1211 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1212 * This function is used to get egress tunnel information for given skb.
1213 * This is useful for retrieving outer tunnel header parameters while
1215 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1216 * This function is used to specify the headroom that the skb must
1217 * consider when allocation skb during packet reception. Setting
1218 * appropriate rx headroom value allows avoiding skb head copy on
1219 * forward. Setting a negative value resets the rx headroom to the
1221 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1222 * This function is used to set or query state related to XDP on the
1223 * netdevice and manage BPF offload. See definition of
1224 * enum bpf_netdev_command for details.
1225 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1227 * This function is used to submit @n XDP packets for transmit on a
1228 * netdevice. Returns number of frames successfully transmitted, frames
1229 * that got dropped are freed/returned via xdp_return_frame().
1230 * Returns negative number, means general error invoking ndo, meaning
1231 * no frames were xmit'ed and core-caller will free all frames.
1232 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1233 * Get devlink port instance associated with a given netdev.
1234 * Called with a reference on the netdevice and devlink locks only,
1235 * rtnl_lock is not held.
1237 struct net_device_ops {
1238 int (*ndo_init)(struct net_device *dev);
1239 void (*ndo_uninit)(struct net_device *dev);
1240 int (*ndo_open)(struct net_device *dev);
1241 int (*ndo_stop)(struct net_device *dev);
1242 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1243 struct net_device *dev);
1244 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1245 struct net_device *dev,
1246 netdev_features_t features);
1247 u16 (*ndo_select_queue)(struct net_device *dev,
1248 struct sk_buff *skb,
1249 struct net_device *sb_dev);
1250 void (*ndo_change_rx_flags)(struct net_device *dev,
1252 void (*ndo_set_rx_mode)(struct net_device *dev);
1253 int (*ndo_set_mac_address)(struct net_device *dev,
1255 int (*ndo_validate_addr)(struct net_device *dev);
1256 int (*ndo_do_ioctl)(struct net_device *dev,
1257 struct ifreq *ifr, int cmd);
1258 int (*ndo_set_config)(struct net_device *dev,
1260 int (*ndo_change_mtu)(struct net_device *dev,
1262 int (*ndo_neigh_setup)(struct net_device *dev,
1263 struct neigh_parms *);
1264 void (*ndo_tx_timeout) (struct net_device *dev);
1266 void (*ndo_get_stats64)(struct net_device *dev,
1267 struct rtnl_link_stats64 *storage);
1268 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1269 int (*ndo_get_offload_stats)(int attr_id,
1270 const struct net_device *dev,
1272 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1274 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1275 __be16 proto, u16 vid);
1276 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1277 __be16 proto, u16 vid);
1278 #ifdef CONFIG_NET_POLL_CONTROLLER
1279 void (*ndo_poll_controller)(struct net_device *dev);
1280 int (*ndo_netpoll_setup)(struct net_device *dev,
1281 struct netpoll_info *info);
1282 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1284 int (*ndo_set_vf_mac)(struct net_device *dev,
1285 int queue, u8 *mac);
1286 int (*ndo_set_vf_vlan)(struct net_device *dev,
1287 int queue, u16 vlan,
1288 u8 qos, __be16 proto);
1289 int (*ndo_set_vf_rate)(struct net_device *dev,
1290 int vf, int min_tx_rate,
1292 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1293 int vf, bool setting);
1294 int (*ndo_set_vf_trust)(struct net_device *dev,
1295 int vf, bool setting);
1296 int (*ndo_get_vf_config)(struct net_device *dev,
1298 struct ifla_vf_info *ivf);
1299 int (*ndo_set_vf_link_state)(struct net_device *dev,
1300 int vf, int link_state);
1301 int (*ndo_get_vf_stats)(struct net_device *dev,
1303 struct ifla_vf_stats
1305 int (*ndo_set_vf_port)(struct net_device *dev,
1307 struct nlattr *port[]);
1308 int (*ndo_get_vf_port)(struct net_device *dev,
1309 int vf, struct sk_buff *skb);
1310 int (*ndo_set_vf_guid)(struct net_device *dev,
1313 int (*ndo_set_vf_rss_query_en)(
1314 struct net_device *dev,
1315 int vf, bool setting);
1316 int (*ndo_setup_tc)(struct net_device *dev,
1317 enum tc_setup_type type,
1319 #if IS_ENABLED(CONFIG_FCOE)
1320 int (*ndo_fcoe_enable)(struct net_device *dev);
1321 int (*ndo_fcoe_disable)(struct net_device *dev);
1322 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1324 struct scatterlist *sgl,
1326 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1328 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1330 struct scatterlist *sgl,
1332 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1333 struct netdev_fcoe_hbainfo *hbainfo);
1336 #if IS_ENABLED(CONFIG_LIBFCOE)
1337 #define NETDEV_FCOE_WWNN 0
1338 #define NETDEV_FCOE_WWPN 1
1339 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1340 u64 *wwn, int type);
1343 #ifdef CONFIG_RFS_ACCEL
1344 int (*ndo_rx_flow_steer)(struct net_device *dev,
1345 const struct sk_buff *skb,
1349 int (*ndo_add_slave)(struct net_device *dev,
1350 struct net_device *slave_dev,
1351 struct netlink_ext_ack *extack);
1352 int (*ndo_del_slave)(struct net_device *dev,
1353 struct net_device *slave_dev);
1354 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1355 netdev_features_t features);
1356 int (*ndo_set_features)(struct net_device *dev,
1357 netdev_features_t features);
1358 int (*ndo_neigh_construct)(struct net_device *dev,
1359 struct neighbour *n);
1360 void (*ndo_neigh_destroy)(struct net_device *dev,
1361 struct neighbour *n);
1363 int (*ndo_fdb_add)(struct ndmsg *ndm,
1364 struct nlattr *tb[],
1365 struct net_device *dev,
1366 const unsigned char *addr,
1369 struct netlink_ext_ack *extack);
1370 int (*ndo_fdb_del)(struct ndmsg *ndm,
1371 struct nlattr *tb[],
1372 struct net_device *dev,
1373 const unsigned char *addr,
1375 int (*ndo_fdb_dump)(struct sk_buff *skb,
1376 struct netlink_callback *cb,
1377 struct net_device *dev,
1378 struct net_device *filter_dev,
1380 int (*ndo_fdb_get)(struct sk_buff *skb,
1381 struct nlattr *tb[],
1382 struct net_device *dev,
1383 const unsigned char *addr,
1384 u16 vid, u32 portid, u32 seq,
1385 struct netlink_ext_ack *extack);
1386 int (*ndo_bridge_setlink)(struct net_device *dev,
1387 struct nlmsghdr *nlh,
1389 struct netlink_ext_ack *extack);
1390 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1392 struct net_device *dev,
1395 int (*ndo_bridge_dellink)(struct net_device *dev,
1396 struct nlmsghdr *nlh,
1398 int (*ndo_change_carrier)(struct net_device *dev,
1400 int (*ndo_get_phys_port_id)(struct net_device *dev,
1401 struct netdev_phys_item_id *ppid);
1402 int (*ndo_get_port_parent_id)(struct net_device *dev,
1403 struct netdev_phys_item_id *ppid);
1404 int (*ndo_get_phys_port_name)(struct net_device *dev,
1405 char *name, size_t len);
1406 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1407 struct udp_tunnel_info *ti);
1408 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1409 struct udp_tunnel_info *ti);
1410 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1411 struct net_device *dev);
1412 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1415 int (*ndo_get_lock_subclass)(struct net_device *dev);
1416 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1419 int (*ndo_get_iflink)(const struct net_device *dev);
1420 int (*ndo_change_proto_down)(struct net_device *dev,
1422 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1423 struct sk_buff *skb);
1424 void (*ndo_set_rx_headroom)(struct net_device *dev,
1425 int needed_headroom);
1426 int (*ndo_bpf)(struct net_device *dev,
1427 struct netdev_bpf *bpf);
1428 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1429 struct xdp_frame **xdp,
1431 int (*ndo_xsk_async_xmit)(struct net_device *dev,
1433 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1437 * enum net_device_priv_flags - &struct net_device priv_flags
1439 * These are the &struct net_device, they are only set internally
1440 * by drivers and used in the kernel. These flags are invisible to
1441 * userspace; this means that the order of these flags can change
1442 * during any kernel release.
1444 * You should have a pretty good reason to be extending these flags.
1446 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1447 * @IFF_EBRIDGE: Ethernet bridging device
1448 * @IFF_BONDING: bonding master or slave
1449 * @IFF_ISATAP: ISATAP interface (RFC4214)
1450 * @IFF_WAN_HDLC: WAN HDLC device
1451 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1453 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1454 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1455 * @IFF_MACVLAN_PORT: device used as macvlan port
1456 * @IFF_BRIDGE_PORT: device used as bridge port
1457 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1458 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1459 * @IFF_UNICAST_FLT: Supports unicast filtering
1460 * @IFF_TEAM_PORT: device used as team port
1461 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1462 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1463 * change when it's running
1464 * @IFF_MACVLAN: Macvlan device
1465 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1466 * underlying stacked devices
1467 * @IFF_L3MDEV_MASTER: device is an L3 master device
1468 * @IFF_NO_QUEUE: device can run without qdisc attached
1469 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1470 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1471 * @IFF_TEAM: device is a team device
1472 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1473 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1474 * entity (i.e. the master device for bridged veth)
1475 * @IFF_MACSEC: device is a MACsec device
1476 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1477 * @IFF_FAILOVER: device is a failover master device
1478 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1479 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1480 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1482 enum netdev_priv_flags {
1483 IFF_802_1Q_VLAN = 1<<0,
1487 IFF_WAN_HDLC = 1<<4,
1488 IFF_XMIT_DST_RELEASE = 1<<5,
1489 IFF_DONT_BRIDGE = 1<<6,
1490 IFF_DISABLE_NETPOLL = 1<<7,
1491 IFF_MACVLAN_PORT = 1<<8,
1492 IFF_BRIDGE_PORT = 1<<9,
1493 IFF_OVS_DATAPATH = 1<<10,
1494 IFF_TX_SKB_SHARING = 1<<11,
1495 IFF_UNICAST_FLT = 1<<12,
1496 IFF_TEAM_PORT = 1<<13,
1497 IFF_SUPP_NOFCS = 1<<14,
1498 IFF_LIVE_ADDR_CHANGE = 1<<15,
1499 IFF_MACVLAN = 1<<16,
1500 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1501 IFF_L3MDEV_MASTER = 1<<18,
1502 IFF_NO_QUEUE = 1<<19,
1503 IFF_OPENVSWITCH = 1<<20,
1504 IFF_L3MDEV_SLAVE = 1<<21,
1506 IFF_RXFH_CONFIGURED = 1<<23,
1507 IFF_PHONY_HEADROOM = 1<<24,
1509 IFF_NO_RX_HANDLER = 1<<26,
1510 IFF_FAILOVER = 1<<27,
1511 IFF_FAILOVER_SLAVE = 1<<28,
1512 IFF_L3MDEV_RX_HANDLER = 1<<29,
1513 IFF_LIVE_RENAME_OK = 1<<30,
1516 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1517 #define IFF_EBRIDGE IFF_EBRIDGE
1518 #define IFF_BONDING IFF_BONDING
1519 #define IFF_ISATAP IFF_ISATAP
1520 #define IFF_WAN_HDLC IFF_WAN_HDLC
1521 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1522 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1523 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1524 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1525 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1526 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1527 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1528 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1529 #define IFF_TEAM_PORT IFF_TEAM_PORT
1530 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1531 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1532 #define IFF_MACVLAN IFF_MACVLAN
1533 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1534 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1535 #define IFF_NO_QUEUE IFF_NO_QUEUE
1536 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1537 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1538 #define IFF_TEAM IFF_TEAM
1539 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1540 #define IFF_MACSEC IFF_MACSEC
1541 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1542 #define IFF_FAILOVER IFF_FAILOVER
1543 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1544 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1545 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1548 * struct net_device - The DEVICE structure.
1550 * Actually, this whole structure is a big mistake. It mixes I/O
1551 * data with strictly "high-level" data, and it has to know about
1552 * almost every data structure used in the INET module.
1554 * @name: This is the first field of the "visible" part of this structure
1555 * (i.e. as seen by users in the "Space.c" file). It is the name
1558 * @name_hlist: Device name hash chain, please keep it close to name[]
1559 * @ifalias: SNMP alias
1560 * @mem_end: Shared memory end
1561 * @mem_start: Shared memory start
1562 * @base_addr: Device I/O address
1563 * @irq: Device IRQ number
1565 * @state: Generic network queuing layer state, see netdev_state_t
1566 * @dev_list: The global list of network devices
1567 * @napi_list: List entry used for polling NAPI devices
1568 * @unreg_list: List entry when we are unregistering the
1569 * device; see the function unregister_netdev
1570 * @close_list: List entry used when we are closing the device
1571 * @ptype_all: Device-specific packet handlers for all protocols
1572 * @ptype_specific: Device-specific, protocol-specific packet handlers
1574 * @adj_list: Directly linked devices, like slaves for bonding
1575 * @features: Currently active device features
1576 * @hw_features: User-changeable features
1578 * @wanted_features: User-requested features
1579 * @vlan_features: Mask of features inheritable by VLAN devices
1581 * @hw_enc_features: Mask of features inherited by encapsulating devices
1582 * This field indicates what encapsulation
1583 * offloads the hardware is capable of doing,
1584 * and drivers will need to set them appropriately.
1586 * @mpls_features: Mask of features inheritable by MPLS
1588 * @ifindex: interface index
1589 * @group: The group the device belongs to
1591 * @stats: Statistics struct, which was left as a legacy, use
1592 * rtnl_link_stats64 instead
1594 * @rx_dropped: Dropped packets by core network,
1595 * do not use this in drivers
1596 * @tx_dropped: Dropped packets by core network,
1597 * do not use this in drivers
1598 * @rx_nohandler: nohandler dropped packets by core network on
1599 * inactive devices, do not use this in drivers
1600 * @carrier_up_count: Number of times the carrier has been up
1601 * @carrier_down_count: Number of times the carrier has been down
1603 * @wireless_handlers: List of functions to handle Wireless Extensions,
1605 * see <net/iw_handler.h> for details.
1606 * @wireless_data: Instance data managed by the core of wireless extensions
1608 * @netdev_ops: Includes several pointers to callbacks,
1609 * if one wants to override the ndo_*() functions
1610 * @ethtool_ops: Management operations
1611 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1612 * discovery handling. Necessary for e.g. 6LoWPAN.
1613 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1614 * of Layer 2 headers.
1616 * @flags: Interface flags (a la BSD)
1617 * @priv_flags: Like 'flags' but invisible to userspace,
1618 * see if.h for the definitions
1619 * @gflags: Global flags ( kept as legacy )
1620 * @padded: How much padding added by alloc_netdev()
1621 * @operstate: RFC2863 operstate
1622 * @link_mode: Mapping policy to operstate
1623 * @if_port: Selectable AUI, TP, ...
1625 * @mtu: Interface MTU value
1626 * @min_mtu: Interface Minimum MTU value
1627 * @max_mtu: Interface Maximum MTU value
1628 * @type: Interface hardware type
1629 * @hard_header_len: Maximum hardware header length.
1630 * @min_header_len: Minimum hardware header length
1632 * @needed_headroom: Extra headroom the hardware may need, but not in all
1633 * cases can this be guaranteed
1634 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1635 * cases can this be guaranteed. Some cases also use
1636 * LL_MAX_HEADER instead to allocate the skb
1638 * interface address info:
1640 * @perm_addr: Permanent hw address
1641 * @addr_assign_type: Hw address assignment type
1642 * @addr_len: Hardware address length
1643 * @neigh_priv_len: Used in neigh_alloc()
1644 * @dev_id: Used to differentiate devices that share
1645 * the same link layer address
1646 * @dev_port: Used to differentiate devices that share
1648 * @addr_list_lock: XXX: need comments on this one
1649 * @uc_promisc: Counter that indicates promiscuous mode
1650 * has been enabled due to the need to listen to
1651 * additional unicast addresses in a device that
1652 * does not implement ndo_set_rx_mode()
1653 * @uc: unicast mac addresses
1654 * @mc: multicast mac addresses
1655 * @dev_addrs: list of device hw addresses
1656 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1657 * @promiscuity: Number of times the NIC is told to work in
1658 * promiscuous mode; if it becomes 0 the NIC will
1659 * exit promiscuous mode
1660 * @allmulti: Counter, enables or disables allmulticast mode
1662 * @vlan_info: VLAN info
1663 * @dsa_ptr: dsa specific data
1664 * @tipc_ptr: TIPC specific data
1665 * @atalk_ptr: AppleTalk link
1666 * @ip_ptr: IPv4 specific data
1667 * @dn_ptr: DECnet specific data
1668 * @ip6_ptr: IPv6 specific data
1669 * @ax25_ptr: AX.25 specific data
1670 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1672 * @dev_addr: Hw address (before bcast,
1673 * because most packets are unicast)
1675 * @_rx: Array of RX queues
1676 * @num_rx_queues: Number of RX queues
1677 * allocated at register_netdev() time
1678 * @real_num_rx_queues: Number of RX queues currently active in device
1680 * @rx_handler: handler for received packets
1681 * @rx_handler_data: XXX: need comments on this one
1682 * @miniq_ingress: ingress/clsact qdisc specific data for
1683 * ingress processing
1684 * @ingress_queue: XXX: need comments on this one
1685 * @broadcast: hw bcast address
1687 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1688 * indexed by RX queue number. Assigned by driver.
1689 * This must only be set if the ndo_rx_flow_steer
1690 * operation is defined
1691 * @index_hlist: Device index hash chain
1693 * @_tx: Array of TX queues
1694 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1695 * @real_num_tx_queues: Number of TX queues currently active in device
1696 * @qdisc: Root qdisc from userspace point of view
1697 * @tx_queue_len: Max frames per queue allowed
1698 * @tx_global_lock: XXX: need comments on this one
1700 * @xps_maps: XXX: need comments on this one
1701 * @miniq_egress: clsact qdisc specific data for
1703 * @watchdog_timeo: Represents the timeout that is used by
1704 * the watchdog (see dev_watchdog())
1705 * @watchdog_timer: List of timers
1707 * @pcpu_refcnt: Number of references to this device
1708 * @todo_list: Delayed register/unregister
1709 * @link_watch_list: XXX: need comments on this one
1711 * @reg_state: Register/unregister state machine
1712 * @dismantle: Device is going to be freed
1713 * @rtnl_link_state: This enum represents the phases of creating
1716 * @needs_free_netdev: Should unregister perform free_netdev?
1717 * @priv_destructor: Called from unregister
1718 * @npinfo: XXX: need comments on this one
1719 * @nd_net: Network namespace this network device is inside
1721 * @ml_priv: Mid-layer private
1722 * @lstats: Loopback statistics
1723 * @tstats: Tunnel statistics
1724 * @dstats: Dummy statistics
1725 * @vstats: Virtual ethernet statistics
1730 * @dev: Class/net/name entry
1731 * @sysfs_groups: Space for optional device, statistics and wireless
1734 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1735 * @rtnl_link_ops: Rtnl_link_ops
1737 * @gso_max_size: Maximum size of generic segmentation offload
1738 * @gso_max_segs: Maximum number of segments that can be passed to the
1741 * @dcbnl_ops: Data Center Bridging netlink ops
1742 * @num_tc: Number of traffic classes in the net device
1743 * @tc_to_txq: XXX: need comments on this one
1744 * @prio_tc_map: XXX: need comments on this one
1746 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1748 * @priomap: XXX: need comments on this one
1749 * @phydev: Physical device may attach itself
1750 * for hardware timestamping
1751 * @sfp_bus: attached &struct sfp_bus structure.
1753 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1754 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1756 * @proto_down: protocol port state information can be sent to the
1757 * switch driver and used to set the phys state of the
1760 * @wol_enabled: Wake-on-LAN is enabled
1762 * FIXME: cleanup struct net_device such that network protocol info
1767 char name[IFNAMSIZ];
1768 struct hlist_node name_hlist;
1769 struct dev_ifalias __rcu *ifalias;
1771 * I/O specific fields
1772 * FIXME: Merge these and struct ifmap into one
1774 unsigned long mem_end;
1775 unsigned long mem_start;
1776 unsigned long base_addr;
1780 * Some hardware also needs these fields (state,dev_list,
1781 * napi_list,unreg_list,close_list) but they are not
1782 * part of the usual set specified in Space.c.
1785 unsigned long state;
1787 struct list_head dev_list;
1788 struct list_head napi_list;
1789 struct list_head unreg_list;
1790 struct list_head close_list;
1791 struct list_head ptype_all;
1792 struct list_head ptype_specific;
1795 struct list_head upper;
1796 struct list_head lower;
1799 netdev_features_t features;
1800 netdev_features_t hw_features;
1801 netdev_features_t wanted_features;
1802 netdev_features_t vlan_features;
1803 netdev_features_t hw_enc_features;
1804 netdev_features_t mpls_features;
1805 netdev_features_t gso_partial_features;
1810 struct net_device_stats stats;
1812 atomic_long_t rx_dropped;
1813 atomic_long_t tx_dropped;
1814 atomic_long_t rx_nohandler;
1816 /* Stats to monitor link on/off, flapping */
1817 atomic_t carrier_up_count;
1818 atomic_t carrier_down_count;
1820 #ifdef CONFIG_WIRELESS_EXT
1821 const struct iw_handler_def *wireless_handlers;
1822 struct iw_public_data *wireless_data;
1824 const struct net_device_ops *netdev_ops;
1825 const struct ethtool_ops *ethtool_ops;
1826 #ifdef CONFIG_NET_L3_MASTER_DEV
1827 const struct l3mdev_ops *l3mdev_ops;
1829 #if IS_ENABLED(CONFIG_IPV6)
1830 const struct ndisc_ops *ndisc_ops;
1833 #ifdef CONFIG_XFRM_OFFLOAD
1834 const struct xfrmdev_ops *xfrmdev_ops;
1837 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1838 const struct tlsdev_ops *tlsdev_ops;
1841 const struct header_ops *header_ops;
1844 unsigned int priv_flags;
1846 unsigned short gflags;
1847 unsigned short padded;
1849 unsigned char operstate;
1850 unsigned char link_mode;
1852 unsigned char if_port;
1856 unsigned int min_mtu;
1857 unsigned int max_mtu;
1858 unsigned short type;
1859 unsigned short hard_header_len;
1860 unsigned char min_header_len;
1862 unsigned short needed_headroom;
1863 unsigned short needed_tailroom;
1865 /* Interface address info. */
1866 unsigned char perm_addr[MAX_ADDR_LEN];
1867 unsigned char addr_assign_type;
1868 unsigned char addr_len;
1869 unsigned short neigh_priv_len;
1870 unsigned short dev_id;
1871 unsigned short dev_port;
1872 spinlock_t addr_list_lock;
1873 unsigned char name_assign_type;
1875 struct netdev_hw_addr_list uc;
1876 struct netdev_hw_addr_list mc;
1877 struct netdev_hw_addr_list dev_addrs;
1880 struct kset *queues_kset;
1882 unsigned int promiscuity;
1883 unsigned int allmulti;
1886 /* Protocol-specific pointers */
1888 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1889 struct vlan_info __rcu *vlan_info;
1891 #if IS_ENABLED(CONFIG_NET_DSA)
1892 struct dsa_port *dsa_ptr;
1894 #if IS_ENABLED(CONFIG_TIPC)
1895 struct tipc_bearer __rcu *tipc_ptr;
1897 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1900 struct in_device __rcu *ip_ptr;
1901 #if IS_ENABLED(CONFIG_DECNET)
1902 struct dn_dev __rcu *dn_ptr;
1904 struct inet6_dev __rcu *ip6_ptr;
1905 #if IS_ENABLED(CONFIG_AX25)
1908 struct wireless_dev *ieee80211_ptr;
1909 struct wpan_dev *ieee802154_ptr;
1910 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1911 struct mpls_dev __rcu *mpls_ptr;
1915 * Cache lines mostly used on receive path (including eth_type_trans())
1917 /* Interface address info used in eth_type_trans() */
1918 unsigned char *dev_addr;
1920 struct netdev_rx_queue *_rx;
1921 unsigned int num_rx_queues;
1922 unsigned int real_num_rx_queues;
1924 struct bpf_prog __rcu *xdp_prog;
1925 unsigned long gro_flush_timeout;
1926 rx_handler_func_t __rcu *rx_handler;
1927 void __rcu *rx_handler_data;
1929 #ifdef CONFIG_NET_CLS_ACT
1930 struct mini_Qdisc __rcu *miniq_ingress;
1932 struct netdev_queue __rcu *ingress_queue;
1933 #ifdef CONFIG_NETFILTER_INGRESS
1934 struct nf_hook_entries __rcu *nf_hooks_ingress;
1937 unsigned char broadcast[MAX_ADDR_LEN];
1938 #ifdef CONFIG_RFS_ACCEL
1939 struct cpu_rmap *rx_cpu_rmap;
1941 struct hlist_node index_hlist;
1944 * Cache lines mostly used on transmit path
1946 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1947 unsigned int num_tx_queues;
1948 unsigned int real_num_tx_queues;
1949 struct Qdisc *qdisc;
1950 #ifdef CONFIG_NET_SCHED
1951 DECLARE_HASHTABLE (qdisc_hash, 4);
1953 unsigned int tx_queue_len;
1954 spinlock_t tx_global_lock;
1958 struct xps_dev_maps __rcu *xps_cpus_map;
1959 struct xps_dev_maps __rcu *xps_rxqs_map;
1961 #ifdef CONFIG_NET_CLS_ACT
1962 struct mini_Qdisc __rcu *miniq_egress;
1965 /* These may be needed for future network-power-down code. */
1966 struct timer_list watchdog_timer;
1968 int __percpu *pcpu_refcnt;
1969 struct list_head todo_list;
1971 struct list_head link_watch_list;
1973 enum { NETREG_UNINITIALIZED=0,
1974 NETREG_REGISTERED, /* completed register_netdevice */
1975 NETREG_UNREGISTERING, /* called unregister_netdevice */
1976 NETREG_UNREGISTERED, /* completed unregister todo */
1977 NETREG_RELEASED, /* called free_netdev */
1978 NETREG_DUMMY, /* dummy device for NAPI poll */
1984 RTNL_LINK_INITIALIZED,
1985 RTNL_LINK_INITIALIZING,
1986 } rtnl_link_state:16;
1988 bool needs_free_netdev;
1989 void (*priv_destructor)(struct net_device *dev);
1991 #ifdef CONFIG_NETPOLL
1992 struct netpoll_info __rcu *npinfo;
1995 possible_net_t nd_net;
1997 /* mid-layer private */
2000 struct pcpu_lstats __percpu *lstats;
2001 struct pcpu_sw_netstats __percpu *tstats;
2002 struct pcpu_dstats __percpu *dstats;
2005 #if IS_ENABLED(CONFIG_GARP)
2006 struct garp_port __rcu *garp_port;
2008 #if IS_ENABLED(CONFIG_MRP)
2009 struct mrp_port __rcu *mrp_port;
2013 const struct attribute_group *sysfs_groups[4];
2014 const struct attribute_group *sysfs_rx_queue_group;
2016 const struct rtnl_link_ops *rtnl_link_ops;
2018 /* for setting kernel sock attribute on TCP connection setup */
2019 #define GSO_MAX_SIZE 65536
2020 unsigned int gso_max_size;
2021 #define GSO_MAX_SEGS 65535
2025 const struct dcbnl_rtnl_ops *dcbnl_ops;
2028 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2029 u8 prio_tc_map[TC_BITMASK + 1];
2031 #if IS_ENABLED(CONFIG_FCOE)
2032 unsigned int fcoe_ddp_xid;
2034 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2035 struct netprio_map __rcu *priomap;
2037 struct phy_device *phydev;
2038 struct sfp_bus *sfp_bus;
2039 struct lock_class_key *qdisc_tx_busylock;
2040 struct lock_class_key *qdisc_running_key;
2042 unsigned wol_enabled:1;
2044 #define to_net_dev(d) container_of(d, struct net_device, dev)
2046 static inline bool netif_elide_gro(const struct net_device *dev)
2048 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2053 #define NETDEV_ALIGN 32
2056 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2058 return dev->prio_tc_map[prio & TC_BITMASK];
2062 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2064 if (tc >= dev->num_tc)
2067 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2071 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2072 void netdev_reset_tc(struct net_device *dev);
2073 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2074 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2077 int netdev_get_num_tc(struct net_device *dev)
2082 void netdev_unbind_sb_channel(struct net_device *dev,
2083 struct net_device *sb_dev);
2084 int netdev_bind_sb_channel_queue(struct net_device *dev,
2085 struct net_device *sb_dev,
2086 u8 tc, u16 count, u16 offset);
2087 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2088 static inline int netdev_get_sb_channel(struct net_device *dev)
2090 return max_t(int, -dev->num_tc, 0);
2094 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2097 return &dev->_tx[index];
2100 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2101 const struct sk_buff *skb)
2103 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2106 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2107 void (*f)(struct net_device *,
2108 struct netdev_queue *,
2114 for (i = 0; i < dev->num_tx_queues; i++)
2115 f(dev, &dev->_tx[i], arg);
2118 #define netdev_lockdep_set_classes(dev) \
2120 static struct lock_class_key qdisc_tx_busylock_key; \
2121 static struct lock_class_key qdisc_running_key; \
2122 static struct lock_class_key qdisc_xmit_lock_key; \
2123 static struct lock_class_key dev_addr_list_lock_key; \
2126 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2127 (dev)->qdisc_running_key = &qdisc_running_key; \
2128 lockdep_set_class(&(dev)->addr_list_lock, \
2129 &dev_addr_list_lock_key); \
2130 for (i = 0; i < (dev)->num_tx_queues; i++) \
2131 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2132 &qdisc_xmit_lock_key); \
2135 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2136 struct net_device *sb_dev);
2137 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2138 struct sk_buff *skb,
2139 struct net_device *sb_dev);
2141 /* returns the headroom that the master device needs to take in account
2142 * when forwarding to this dev
2144 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2146 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2149 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2151 if (dev->netdev_ops->ndo_set_rx_headroom)
2152 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2155 /* set the device rx headroom to the dev's default */
2156 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2158 netdev_set_rx_headroom(dev, -1);
2162 * Net namespace inlines
2165 struct net *dev_net(const struct net_device *dev)
2167 return read_pnet(&dev->nd_net);
2171 void dev_net_set(struct net_device *dev, struct net *net)
2173 write_pnet(&dev->nd_net, net);
2177 * netdev_priv - access network device private data
2178 * @dev: network device
2180 * Get network device private data
2182 static inline void *netdev_priv(const struct net_device *dev)
2184 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2187 /* Set the sysfs physical device reference for the network logical device
2188 * if set prior to registration will cause a symlink during initialization.
2190 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2192 /* Set the sysfs device type for the network logical device to allow
2193 * fine-grained identification of different network device types. For
2194 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2196 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2198 /* Default NAPI poll() weight
2199 * Device drivers are strongly advised to not use bigger value
2201 #define NAPI_POLL_WEIGHT 64
2204 * netif_napi_add - initialize a NAPI context
2205 * @dev: network device
2206 * @napi: NAPI context
2207 * @poll: polling function
2208 * @weight: default weight
2210 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2211 * *any* of the other NAPI-related functions.
2213 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2214 int (*poll)(struct napi_struct *, int), int weight);
2217 * netif_tx_napi_add - initialize a NAPI context
2218 * @dev: network device
2219 * @napi: NAPI context
2220 * @poll: polling function
2221 * @weight: default weight
2223 * This variant of netif_napi_add() should be used from drivers using NAPI
2224 * to exclusively poll a TX queue.
2225 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2227 static inline void netif_tx_napi_add(struct net_device *dev,
2228 struct napi_struct *napi,
2229 int (*poll)(struct napi_struct *, int),
2232 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2233 netif_napi_add(dev, napi, poll, weight);
2237 * netif_napi_del - remove a NAPI context
2238 * @napi: NAPI context
2240 * netif_napi_del() removes a NAPI context from the network device NAPI list
2242 void netif_napi_del(struct napi_struct *napi);
2244 struct napi_gro_cb {
2245 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2248 /* Length of frag0. */
2249 unsigned int frag0_len;
2251 /* This indicates where we are processing relative to skb->data. */
2254 /* This is non-zero if the packet cannot be merged with the new skb. */
2257 /* Save the IP ID here and check when we get to the transport layer */
2260 /* Number of segments aggregated. */
2263 /* Start offset for remote checksum offload */
2264 u16 gro_remcsum_start;
2266 /* jiffies when first packet was created/queued */
2269 /* Used in ipv6_gro_receive() and foo-over-udp */
2272 /* This is non-zero if the packet may be of the same flow. */
2275 /* Used in tunnel GRO receive */
2278 /* GRO checksum is valid */
2281 /* Number of checksums via CHECKSUM_UNNECESSARY */
2286 #define NAPI_GRO_FREE 1
2287 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2289 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2292 /* Used in GRE, set in fou/gue_gro_receive */
2295 /* Used to determine if flush_id can be ignored */
2298 /* Number of gro_receive callbacks this packet already went through */
2299 u8 recursion_counter:4;
2303 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2306 /* used in skb_gro_receive() slow path */
2307 struct sk_buff *last;
2310 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2312 #define GRO_RECURSION_LIMIT 15
2313 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2315 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2318 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2319 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2320 struct list_head *head,
2321 struct sk_buff *skb)
2323 if (unlikely(gro_recursion_inc_test(skb))) {
2324 NAPI_GRO_CB(skb)->flush |= 1;
2328 return cb(head, skb);
2331 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2333 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2335 struct list_head *head,
2336 struct sk_buff *skb)
2338 if (unlikely(gro_recursion_inc_test(skb))) {
2339 NAPI_GRO_CB(skb)->flush |= 1;
2343 return cb(sk, head, skb);
2346 struct packet_type {
2347 __be16 type; /* This is really htons(ether_type). */
2348 bool ignore_outgoing;
2349 struct net_device *dev; /* NULL is wildcarded here */
2350 int (*func) (struct sk_buff *,
2351 struct net_device *,
2352 struct packet_type *,
2353 struct net_device *);
2354 void (*list_func) (struct list_head *,
2355 struct packet_type *,
2356 struct net_device *);
2357 bool (*id_match)(struct packet_type *ptype,
2359 void *af_packet_priv;
2360 struct list_head list;
2363 struct offload_callbacks {
2364 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2365 netdev_features_t features);
2366 struct sk_buff *(*gro_receive)(struct list_head *head,
2367 struct sk_buff *skb);
2368 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2371 struct packet_offload {
2372 __be16 type; /* This is really htons(ether_type). */
2374 struct offload_callbacks callbacks;
2375 struct list_head list;
2378 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2379 struct pcpu_sw_netstats {
2384 struct u64_stats_sync syncp;
2385 } __aligned(4 * sizeof(u64));
2387 struct pcpu_lstats {
2390 struct u64_stats_sync syncp;
2391 } __aligned(2 * sizeof(u64));
2393 #define __netdev_alloc_pcpu_stats(type, gfp) \
2395 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2398 for_each_possible_cpu(__cpu) { \
2399 typeof(type) *stat; \
2400 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2401 u64_stats_init(&stat->syncp); \
2407 #define netdev_alloc_pcpu_stats(type) \
2408 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2410 enum netdev_lag_tx_type {
2411 NETDEV_LAG_TX_TYPE_UNKNOWN,
2412 NETDEV_LAG_TX_TYPE_RANDOM,
2413 NETDEV_LAG_TX_TYPE_BROADCAST,
2414 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2415 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2416 NETDEV_LAG_TX_TYPE_HASH,
2419 enum netdev_lag_hash {
2420 NETDEV_LAG_HASH_NONE,
2422 NETDEV_LAG_HASH_L34,
2423 NETDEV_LAG_HASH_L23,
2424 NETDEV_LAG_HASH_E23,
2425 NETDEV_LAG_HASH_E34,
2426 NETDEV_LAG_HASH_UNKNOWN,
2429 struct netdev_lag_upper_info {
2430 enum netdev_lag_tx_type tx_type;
2431 enum netdev_lag_hash hash_type;
2434 struct netdev_lag_lower_state_info {
2439 #include <linux/notifier.h>
2441 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2442 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2446 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2448 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2449 detected a hardware crash and restarted
2450 - we can use this eg to kick tcp sessions
2452 NETDEV_CHANGE, /* Notify device state change */
2455 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2456 NETDEV_CHANGEADDR, /* notify after the address change */
2457 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2461 NETDEV_BONDING_FAILOVER,
2463 NETDEV_PRE_TYPE_CHANGE,
2464 NETDEV_POST_TYPE_CHANGE,
2467 NETDEV_NOTIFY_PEERS,
2471 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2472 NETDEV_CHANGEINFODATA,
2473 NETDEV_BONDING_INFO,
2474 NETDEV_PRECHANGEUPPER,
2475 NETDEV_CHANGELOWERSTATE,
2476 NETDEV_UDP_TUNNEL_PUSH_INFO,
2477 NETDEV_UDP_TUNNEL_DROP_INFO,
2478 NETDEV_CHANGE_TX_QUEUE_LEN,
2479 NETDEV_CVLAN_FILTER_PUSH_INFO,
2480 NETDEV_CVLAN_FILTER_DROP_INFO,
2481 NETDEV_SVLAN_FILTER_PUSH_INFO,
2482 NETDEV_SVLAN_FILTER_DROP_INFO,
2484 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2486 int register_netdevice_notifier(struct notifier_block *nb);
2487 int unregister_netdevice_notifier(struct notifier_block *nb);
2489 struct netdev_notifier_info {
2490 struct net_device *dev;
2491 struct netlink_ext_ack *extack;
2494 struct netdev_notifier_info_ext {
2495 struct netdev_notifier_info info; /* must be first */
2501 struct netdev_notifier_change_info {
2502 struct netdev_notifier_info info; /* must be first */
2503 unsigned int flags_changed;
2506 struct netdev_notifier_changeupper_info {
2507 struct netdev_notifier_info info; /* must be first */
2508 struct net_device *upper_dev; /* new upper dev */
2509 bool master; /* is upper dev master */
2510 bool linking; /* is the notification for link or unlink */
2511 void *upper_info; /* upper dev info */
2514 struct netdev_notifier_changelowerstate_info {
2515 struct netdev_notifier_info info; /* must be first */
2516 void *lower_state_info; /* is lower dev state */
2519 struct netdev_notifier_pre_changeaddr_info {
2520 struct netdev_notifier_info info; /* must be first */
2521 const unsigned char *dev_addr;
2524 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2525 struct net_device *dev)
2528 info->extack = NULL;
2531 static inline struct net_device *
2532 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2537 static inline struct netlink_ext_ack *
2538 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2540 return info->extack;
2543 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2546 extern rwlock_t dev_base_lock; /* Device list lock */
2548 #define for_each_netdev(net, d) \
2549 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2550 #define for_each_netdev_reverse(net, d) \
2551 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2552 #define for_each_netdev_rcu(net, d) \
2553 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2554 #define for_each_netdev_safe(net, d, n) \
2555 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2556 #define for_each_netdev_continue(net, d) \
2557 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2558 #define for_each_netdev_continue_rcu(net, d) \
2559 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2560 #define for_each_netdev_in_bond_rcu(bond, slave) \
2561 for_each_netdev_rcu(&init_net, slave) \
2562 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2563 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2565 static inline struct net_device *next_net_device(struct net_device *dev)
2567 struct list_head *lh;
2571 lh = dev->dev_list.next;
2572 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2575 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2577 struct list_head *lh;
2581 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2582 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2585 static inline struct net_device *first_net_device(struct net *net)
2587 return list_empty(&net->dev_base_head) ? NULL :
2588 net_device_entry(net->dev_base_head.next);
2591 static inline struct net_device *first_net_device_rcu(struct net *net)
2593 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2595 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2598 int netdev_boot_setup_check(struct net_device *dev);
2599 unsigned long netdev_boot_base(const char *prefix, int unit);
2600 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2601 const char *hwaddr);
2602 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2603 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2604 void dev_add_pack(struct packet_type *pt);
2605 void dev_remove_pack(struct packet_type *pt);
2606 void __dev_remove_pack(struct packet_type *pt);
2607 void dev_add_offload(struct packet_offload *po);
2608 void dev_remove_offload(struct packet_offload *po);
2610 int dev_get_iflink(const struct net_device *dev);
2611 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2612 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2613 unsigned short mask);
2614 struct net_device *dev_get_by_name(struct net *net, const char *name);
2615 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2616 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2617 int dev_alloc_name(struct net_device *dev, const char *name);
2618 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2619 void dev_close(struct net_device *dev);
2620 void dev_close_many(struct list_head *head, bool unlink);
2621 void dev_disable_lro(struct net_device *dev);
2622 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2623 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2624 struct net_device *sb_dev);
2625 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2626 struct net_device *sb_dev);
2627 int dev_queue_xmit(struct sk_buff *skb);
2628 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2629 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2630 int register_netdevice(struct net_device *dev);
2631 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2632 void unregister_netdevice_many(struct list_head *head);
2633 static inline void unregister_netdevice(struct net_device *dev)
2635 unregister_netdevice_queue(dev, NULL);
2638 int netdev_refcnt_read(const struct net_device *dev);
2639 void free_netdev(struct net_device *dev);
2640 void netdev_freemem(struct net_device *dev);
2641 void synchronize_net(void);
2642 int init_dummy_netdev(struct net_device *dev);
2644 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2645 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2646 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2647 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2648 int netdev_get_name(struct net *net, char *name, int ifindex);
2649 int dev_restart(struct net_device *dev);
2650 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2652 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2654 return NAPI_GRO_CB(skb)->data_offset;
2657 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2659 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2662 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2664 NAPI_GRO_CB(skb)->data_offset += len;
2667 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2668 unsigned int offset)
2670 return NAPI_GRO_CB(skb)->frag0 + offset;
2673 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2675 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2678 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2680 NAPI_GRO_CB(skb)->frag0 = NULL;
2681 NAPI_GRO_CB(skb)->frag0_len = 0;
2684 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2685 unsigned int offset)
2687 if (!pskb_may_pull(skb, hlen))
2690 skb_gro_frag0_invalidate(skb);
2691 return skb->data + offset;
2694 static inline void *skb_gro_network_header(struct sk_buff *skb)
2696 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2697 skb_network_offset(skb);
2700 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2701 const void *start, unsigned int len)
2703 if (NAPI_GRO_CB(skb)->csum_valid)
2704 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2705 csum_partial(start, len, 0));
2708 /* GRO checksum functions. These are logical equivalents of the normal
2709 * checksum functions (in skbuff.h) except that they operate on the GRO
2710 * offsets and fields in sk_buff.
2713 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2715 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2717 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2720 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2724 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2725 skb_checksum_start_offset(skb) <
2726 skb_gro_offset(skb)) &&
2727 !skb_at_gro_remcsum_start(skb) &&
2728 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2729 (!zero_okay || check));
2732 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2735 if (NAPI_GRO_CB(skb)->csum_valid &&
2736 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2739 NAPI_GRO_CB(skb)->csum = psum;
2741 return __skb_gro_checksum_complete(skb);
2744 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2746 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2747 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2748 NAPI_GRO_CB(skb)->csum_cnt--;
2750 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2751 * verified a new top level checksum or an encapsulated one
2752 * during GRO. This saves work if we fallback to normal path.
2754 __skb_incr_checksum_unnecessary(skb);
2758 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2761 __sum16 __ret = 0; \
2762 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2763 __ret = __skb_gro_checksum_validate_complete(skb, \
2764 compute_pseudo(skb, proto)); \
2766 skb_gro_incr_csum_unnecessary(skb); \
2770 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2771 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2773 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2775 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2777 #define skb_gro_checksum_simple_validate(skb) \
2778 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2780 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2782 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2783 !NAPI_GRO_CB(skb)->csum_valid);
2786 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2787 __sum16 check, __wsum pseudo)
2789 NAPI_GRO_CB(skb)->csum = ~pseudo;
2790 NAPI_GRO_CB(skb)->csum_valid = 1;
2793 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2795 if (__skb_gro_checksum_convert_check(skb)) \
2796 __skb_gro_checksum_convert(skb, check, \
2797 compute_pseudo(skb, proto)); \
2800 struct gro_remcsum {
2805 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2811 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2812 unsigned int off, size_t hdrlen,
2813 int start, int offset,
2814 struct gro_remcsum *grc,
2818 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2820 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2823 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2827 ptr = skb_gro_header_fast(skb, off);
2828 if (skb_gro_header_hard(skb, off + plen)) {
2829 ptr = skb_gro_header_slow(skb, off + plen, off);
2834 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2837 /* Adjust skb->csum since we changed the packet */
2838 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2840 grc->offset = off + hdrlen + offset;
2846 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2847 struct gro_remcsum *grc)
2850 size_t plen = grc->offset + sizeof(u16);
2855 ptr = skb_gro_header_fast(skb, grc->offset);
2856 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2857 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2862 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2865 #ifdef CONFIG_XFRM_OFFLOAD
2866 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2868 if (PTR_ERR(pp) != -EINPROGRESS)
2869 NAPI_GRO_CB(skb)->flush |= flush;
2871 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2874 struct gro_remcsum *grc)
2876 if (PTR_ERR(pp) != -EINPROGRESS) {
2877 NAPI_GRO_CB(skb)->flush |= flush;
2878 skb_gro_remcsum_cleanup(skb, grc);
2879 skb->remcsum_offload = 0;
2883 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2885 NAPI_GRO_CB(skb)->flush |= flush;
2887 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2890 struct gro_remcsum *grc)
2892 NAPI_GRO_CB(skb)->flush |= flush;
2893 skb_gro_remcsum_cleanup(skb, grc);
2894 skb->remcsum_offload = 0;
2898 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2899 unsigned short type,
2900 const void *daddr, const void *saddr,
2903 if (!dev->header_ops || !dev->header_ops->create)
2906 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2909 static inline int dev_parse_header(const struct sk_buff *skb,
2910 unsigned char *haddr)
2912 const struct net_device *dev = skb->dev;
2914 if (!dev->header_ops || !dev->header_ops->parse)
2916 return dev->header_ops->parse(skb, haddr);
2919 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2921 const struct net_device *dev = skb->dev;
2923 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2925 return dev->header_ops->parse_protocol(skb);
2928 /* ll_header must have at least hard_header_len allocated */
2929 static inline bool dev_validate_header(const struct net_device *dev,
2930 char *ll_header, int len)
2932 if (likely(len >= dev->hard_header_len))
2934 if (len < dev->min_header_len)
2937 if (capable(CAP_SYS_RAWIO)) {
2938 memset(ll_header + len, 0, dev->hard_header_len - len);
2942 if (dev->header_ops && dev->header_ops->validate)
2943 return dev->header_ops->validate(ll_header, len);
2948 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2950 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2951 static inline int unregister_gifconf(unsigned int family)
2953 return register_gifconf(family, NULL);
2956 #ifdef CONFIG_NET_FLOW_LIMIT
2957 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2958 struct sd_flow_limit {
2960 unsigned int num_buckets;
2961 unsigned int history_head;
2962 u16 history[FLOW_LIMIT_HISTORY];
2966 extern int netdev_flow_limit_table_len;
2967 #endif /* CONFIG_NET_FLOW_LIMIT */
2970 * Incoming packets are placed on per-CPU queues
2972 struct softnet_data {
2973 struct list_head poll_list;
2974 struct sk_buff_head process_queue;
2977 unsigned int processed;
2978 unsigned int time_squeeze;
2979 unsigned int received_rps;
2981 struct softnet_data *rps_ipi_list;
2983 #ifdef CONFIG_NET_FLOW_LIMIT
2984 struct sd_flow_limit __rcu *flow_limit;
2986 struct Qdisc *output_queue;
2987 struct Qdisc **output_queue_tailp;
2988 struct sk_buff *completion_queue;
2989 #ifdef CONFIG_XFRM_OFFLOAD
2990 struct sk_buff_head xfrm_backlog;
2992 /* written and read only by owning cpu: */
2998 /* input_queue_head should be written by cpu owning this struct,
2999 * and only read by other cpus. Worth using a cache line.
3001 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3003 /* Elements below can be accessed between CPUs for RPS/RFS */
3004 call_single_data_t csd ____cacheline_aligned_in_smp;
3005 struct softnet_data *rps_ipi_next;
3007 unsigned int input_queue_tail;
3009 unsigned int dropped;
3010 struct sk_buff_head input_pkt_queue;
3011 struct napi_struct backlog;
3015 static inline void input_queue_head_incr(struct softnet_data *sd)
3018 sd->input_queue_head++;
3022 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3023 unsigned int *qtail)
3026 *qtail = ++sd->input_queue_tail;
3030 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3032 static inline int dev_recursion_level(void)
3034 return this_cpu_read(softnet_data.xmit.recursion);
3037 #define XMIT_RECURSION_LIMIT 10
3038 static inline bool dev_xmit_recursion(void)
3040 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3041 XMIT_RECURSION_LIMIT);
3044 static inline void dev_xmit_recursion_inc(void)
3046 __this_cpu_inc(softnet_data.xmit.recursion);
3049 static inline void dev_xmit_recursion_dec(void)
3051 __this_cpu_dec(softnet_data.xmit.recursion);
3054 void __netif_schedule(struct Qdisc *q);
3055 void netif_schedule_queue(struct netdev_queue *txq);
3057 static inline void netif_tx_schedule_all(struct net_device *dev)
3061 for (i = 0; i < dev->num_tx_queues; i++)
3062 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3065 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3067 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3071 * netif_start_queue - allow transmit
3072 * @dev: network device
3074 * Allow upper layers to call the device hard_start_xmit routine.
3076 static inline void netif_start_queue(struct net_device *dev)
3078 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3081 static inline void netif_tx_start_all_queues(struct net_device *dev)
3085 for (i = 0; i < dev->num_tx_queues; i++) {
3086 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3087 netif_tx_start_queue(txq);
3091 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3094 * netif_wake_queue - restart transmit
3095 * @dev: network device
3097 * Allow upper layers to call the device hard_start_xmit routine.
3098 * Used for flow control when transmit resources are available.
3100 static inline void netif_wake_queue(struct net_device *dev)
3102 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3105 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3109 for (i = 0; i < dev->num_tx_queues; i++) {
3110 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3111 netif_tx_wake_queue(txq);
3115 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3117 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3121 * netif_stop_queue - stop transmitted packets
3122 * @dev: network device
3124 * Stop upper layers calling the device hard_start_xmit routine.
3125 * Used for flow control when transmit resources are unavailable.
3127 static inline void netif_stop_queue(struct net_device *dev)
3129 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3132 void netif_tx_stop_all_queues(struct net_device *dev);
3134 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3136 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3140 * netif_queue_stopped - test if transmit queue is flowblocked
3141 * @dev: network device
3143 * Test if transmit queue on device is currently unable to send.
3145 static inline bool netif_queue_stopped(const struct net_device *dev)
3147 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3150 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3152 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3156 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3158 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3162 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3164 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3168 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3169 * @dev_queue: pointer to transmit queue
3171 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3172 * to give appropriate hint to the CPU.
3174 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3177 prefetchw(&dev_queue->dql.num_queued);
3182 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3183 * @dev_queue: pointer to transmit queue
3185 * BQL enabled drivers might use this helper in their TX completion path,
3186 * to give appropriate hint to the CPU.
3188 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3191 prefetchw(&dev_queue->dql.limit);
3195 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3199 dql_queued(&dev_queue->dql, bytes);
3201 if (likely(dql_avail(&dev_queue->dql) >= 0))
3204 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3207 * The XOFF flag must be set before checking the dql_avail below,
3208 * because in netdev_tx_completed_queue we update the dql_completed
3209 * before checking the XOFF flag.
3213 /* check again in case another CPU has just made room avail */
3214 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3215 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3219 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3220 * that they should not test BQL status themselves.
3221 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3223 * Returns true if the doorbell must be used to kick the NIC.
3225 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3231 dql_queued(&dev_queue->dql, bytes);
3233 return netif_tx_queue_stopped(dev_queue);
3235 netdev_tx_sent_queue(dev_queue, bytes);
3240 * netdev_sent_queue - report the number of bytes queued to hardware
3241 * @dev: network device
3242 * @bytes: number of bytes queued to the hardware device queue
3244 * Report the number of bytes queued for sending/completion to the network
3245 * device hardware queue. @bytes should be a good approximation and should
3246 * exactly match netdev_completed_queue() @bytes
3248 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3250 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3253 static inline bool __netdev_sent_queue(struct net_device *dev,
3257 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3261 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3262 unsigned int pkts, unsigned int bytes)
3265 if (unlikely(!bytes))
3268 dql_completed(&dev_queue->dql, bytes);
3271 * Without the memory barrier there is a small possiblity that
3272 * netdev_tx_sent_queue will miss the update and cause the queue to
3273 * be stopped forever
3277 if (dql_avail(&dev_queue->dql) < 0)
3280 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3281 netif_schedule_queue(dev_queue);
3286 * netdev_completed_queue - report bytes and packets completed by device
3287 * @dev: network device
3288 * @pkts: actual number of packets sent over the medium
3289 * @bytes: actual number of bytes sent over the medium
3291 * Report the number of bytes and packets transmitted by the network device
3292 * hardware queue over the physical medium, @bytes must exactly match the
3293 * @bytes amount passed to netdev_sent_queue()
3295 static inline void netdev_completed_queue(struct net_device *dev,
3296 unsigned int pkts, unsigned int bytes)
3298 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3301 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3304 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3310 * netdev_reset_queue - reset the packets and bytes count of a network device
3311 * @dev_queue: network device
3313 * Reset the bytes and packet count of a network device and clear the
3314 * software flow control OFF bit for this network device
3316 static inline void netdev_reset_queue(struct net_device *dev_queue)
3318 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3322 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3323 * @dev: network device
3324 * @queue_index: given tx queue index
3326 * Returns 0 if given tx queue index >= number of device tx queues,
3327 * otherwise returns the originally passed tx queue index.
3329 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3331 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3332 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3333 dev->name, queue_index,
3334 dev->real_num_tx_queues);
3342 * netif_running - test if up
3343 * @dev: network device
3345 * Test if the device has been brought up.
3347 static inline bool netif_running(const struct net_device *dev)
3349 return test_bit(__LINK_STATE_START, &dev->state);
3353 * Routines to manage the subqueues on a device. We only need start,
3354 * stop, and a check if it's stopped. All other device management is
3355 * done at the overall netdevice level.
3356 * Also test the device if we're multiqueue.
3360 * netif_start_subqueue - allow sending packets on subqueue
3361 * @dev: network device
3362 * @queue_index: sub queue index
3364 * Start individual transmit queue of a device with multiple transmit queues.
3366 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3368 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3370 netif_tx_start_queue(txq);
3374 * netif_stop_subqueue - stop sending packets on subqueue
3375 * @dev: network device
3376 * @queue_index: sub queue index
3378 * Stop individual transmit queue of a device with multiple transmit queues.
3380 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3382 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3383 netif_tx_stop_queue(txq);
3387 * netif_subqueue_stopped - test status of subqueue
3388 * @dev: network device
3389 * @queue_index: sub queue index
3391 * Check individual transmit queue of a device with multiple transmit queues.
3393 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3396 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3398 return netif_tx_queue_stopped(txq);
3401 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3402 struct sk_buff *skb)
3404 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3408 * netif_wake_subqueue - allow sending packets on subqueue
3409 * @dev: network device
3410 * @queue_index: sub queue index
3412 * Resume individual transmit queue of a device with multiple transmit queues.
3414 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3416 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3418 netif_tx_wake_queue(txq);
3422 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3424 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3425 u16 index, bool is_rxqs_map);
3428 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3429 * @j: CPU/Rx queue index
3430 * @mask: bitmask of all cpus/rx queues
3431 * @nr_bits: number of bits in the bitmask
3433 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3435 static inline bool netif_attr_test_mask(unsigned long j,
3436 const unsigned long *mask,
3437 unsigned int nr_bits)
3439 cpu_max_bits_warn(j, nr_bits);
3440 return test_bit(j, mask);
3444 * netif_attr_test_online - Test for online CPU/Rx queue
3445 * @j: CPU/Rx queue index
3446 * @online_mask: bitmask for CPUs/Rx queues that are online
3447 * @nr_bits: number of bits in the bitmask
3449 * Returns true if a CPU/Rx queue is online.
3451 static inline bool netif_attr_test_online(unsigned long j,
3452 const unsigned long *online_mask,
3453 unsigned int nr_bits)
3455 cpu_max_bits_warn(j, nr_bits);
3458 return test_bit(j, online_mask);
3460 return (j < nr_bits);
3464 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3465 * @n: CPU/Rx queue index
3466 * @srcp: the cpumask/Rx queue mask pointer
3467 * @nr_bits: number of bits in the bitmask
3469 * Returns >= nr_bits if no further CPUs/Rx queues set.
3471 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3472 unsigned int nr_bits)
3474 /* -1 is a legal arg here. */
3476 cpu_max_bits_warn(n, nr_bits);
3479 return find_next_bit(srcp, nr_bits, n + 1);
3485 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3486 * @n: CPU/Rx queue index
3487 * @src1p: the first CPUs/Rx queues mask pointer
3488 * @src2p: the second CPUs/Rx queues mask pointer
3489 * @nr_bits: number of bits in the bitmask
3491 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3493 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3494 const unsigned long *src2p,
3495 unsigned int nr_bits)
3497 /* -1 is a legal arg here. */
3499 cpu_max_bits_warn(n, nr_bits);
3502 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3504 return find_next_bit(src1p, nr_bits, n + 1);
3506 return find_next_bit(src2p, nr_bits, n + 1);
3511 static inline int netif_set_xps_queue(struct net_device *dev,
3512 const struct cpumask *mask,
3518 static inline int __netif_set_xps_queue(struct net_device *dev,
3519 const unsigned long *mask,
3520 u16 index, bool is_rxqs_map)
3527 * netif_is_multiqueue - test if device has multiple transmit queues
3528 * @dev: network device
3530 * Check if device has multiple transmit queues
3532 static inline bool netif_is_multiqueue(const struct net_device *dev)
3534 return dev->num_tx_queues > 1;
3537 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3540 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3542 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3545 dev->real_num_rx_queues = rxqs;
3550 static inline struct netdev_rx_queue *
3551 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3553 return dev->_rx + rxq;
3557 static inline unsigned int get_netdev_rx_queue_index(
3558 struct netdev_rx_queue *queue)
3560 struct net_device *dev = queue->dev;
3561 int index = queue - dev->_rx;
3563 BUG_ON(index >= dev->num_rx_queues);
3568 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3569 int netif_get_num_default_rss_queues(void);
3571 enum skb_free_reason {
3572 SKB_REASON_CONSUMED,
3576 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3577 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3580 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3581 * interrupt context or with hardware interrupts being disabled.
3582 * (in_irq() || irqs_disabled())
3584 * We provide four helpers that can be used in following contexts :
3586 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3587 * replacing kfree_skb(skb)
3589 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3590 * Typically used in place of consume_skb(skb) in TX completion path
3592 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3593 * replacing kfree_skb(skb)
3595 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3596 * and consumed a packet. Used in place of consume_skb(skb)
3598 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3600 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3603 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3605 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3608 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3610 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3613 static inline void dev_consume_skb_any(struct sk_buff *skb)
3615 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3618 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3619 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3620 int netif_rx(struct sk_buff *skb);
3621 int netif_rx_ni(struct sk_buff *skb);
3622 int netif_receive_skb(struct sk_buff *skb);
3623 int netif_receive_skb_core(struct sk_buff *skb);
3624 void netif_receive_skb_list(struct list_head *head);
3625 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3626 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3627 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3628 gro_result_t napi_gro_frags(struct napi_struct *napi);
3629 struct packet_offload *gro_find_receive_by_type(__be16 type);
3630 struct packet_offload *gro_find_complete_by_type(__be16 type);
3632 static inline void napi_free_frags(struct napi_struct *napi)
3634 kfree_skb(napi->skb);
3638 bool netdev_is_rx_handler_busy(struct net_device *dev);
3639 int netdev_rx_handler_register(struct net_device *dev,
3640 rx_handler_func_t *rx_handler,
3641 void *rx_handler_data);
3642 void netdev_rx_handler_unregister(struct net_device *dev);
3644 bool dev_valid_name(const char *name);
3645 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3646 bool *need_copyout);
3647 int dev_ifconf(struct net *net, struct ifconf *, int);
3648 int dev_ethtool(struct net *net, struct ifreq *);
3649 unsigned int dev_get_flags(const struct net_device *);
3650 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3651 struct netlink_ext_ack *extack);
3652 int dev_change_flags(struct net_device *dev, unsigned int flags,
3653 struct netlink_ext_ack *extack);
3654 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3655 unsigned int gchanges);
3656 int dev_change_name(struct net_device *, const char *);
3657 int dev_set_alias(struct net_device *, const char *, size_t);
3658 int dev_get_alias(const struct net_device *, char *, size_t);
3659 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3660 int __dev_set_mtu(struct net_device *, int);
3661 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3662 struct netlink_ext_ack *extack);
3663 int dev_set_mtu(struct net_device *, int);
3664 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3665 void dev_set_group(struct net_device *, int);
3666 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3667 struct netlink_ext_ack *extack);
3668 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3669 struct netlink_ext_ack *extack);
3670 int dev_change_carrier(struct net_device *, bool new_carrier);
3671 int dev_get_phys_port_id(struct net_device *dev,
3672 struct netdev_phys_item_id *ppid);
3673 int dev_get_phys_port_name(struct net_device *dev,
3674 char *name, size_t len);
3675 int dev_get_port_parent_id(struct net_device *dev,
3676 struct netdev_phys_item_id *ppid, bool recurse);
3677 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3678 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3679 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3680 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3681 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3682 struct netdev_queue *txq, int *ret);
3684 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3685 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3687 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3688 enum bpf_netdev_command cmd);
3689 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3691 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3692 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3693 bool is_skb_forwardable(const struct net_device *dev,
3694 const struct sk_buff *skb);
3696 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3697 struct sk_buff *skb)
3699 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3700 unlikely(!is_skb_forwardable(dev, skb))) {
3701 atomic_long_inc(&dev->rx_dropped);
3706 skb_scrub_packet(skb, true);
3711 bool dev_nit_active(struct net_device *dev);
3712 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3714 extern int netdev_budget;
3715 extern unsigned int netdev_budget_usecs;
3717 /* Called by rtnetlink.c:rtnl_unlock() */
3718 void netdev_run_todo(void);
3721 * dev_put - release reference to device
3722 * @dev: network device
3724 * Release reference to device to allow it to be freed.
3726 static inline void dev_put(struct net_device *dev)
3728 this_cpu_dec(*dev->pcpu_refcnt);
3732 * dev_hold - get reference to device
3733 * @dev: network device
3735 * Hold reference to device to keep it from being freed.
3737 static inline void dev_hold(struct net_device *dev)
3739 this_cpu_inc(*dev->pcpu_refcnt);
3742 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3743 * and _off may be called from IRQ context, but it is caller
3744 * who is responsible for serialization of these calls.
3746 * The name carrier is inappropriate, these functions should really be
3747 * called netif_lowerlayer_*() because they represent the state of any
3748 * kind of lower layer not just hardware media.
3751 void linkwatch_init_dev(struct net_device *dev);
3752 void linkwatch_fire_event(struct net_device *dev);
3753 void linkwatch_forget_dev(struct net_device *dev);
3756 * netif_carrier_ok - test if carrier present
3757 * @dev: network device
3759 * Check if carrier is present on device
3761 static inline bool netif_carrier_ok(const struct net_device *dev)
3763 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3766 unsigned long dev_trans_start(struct net_device *dev);
3768 void __netdev_watchdog_up(struct net_device *dev);
3770 void netif_carrier_on(struct net_device *dev);
3772 void netif_carrier_off(struct net_device *dev);
3775 * netif_dormant_on - mark device as dormant.
3776 * @dev: network device
3778 * Mark device as dormant (as per RFC2863).
3780 * The dormant state indicates that the relevant interface is not
3781 * actually in a condition to pass packets (i.e., it is not 'up') but is
3782 * in a "pending" state, waiting for some external event. For "on-
3783 * demand" interfaces, this new state identifies the situation where the
3784 * interface is waiting for events to place it in the up state.
3786 static inline void netif_dormant_on(struct net_device *dev)
3788 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3789 linkwatch_fire_event(dev);
3793 * netif_dormant_off - set device as not dormant.
3794 * @dev: network device
3796 * Device is not in dormant state.
3798 static inline void netif_dormant_off(struct net_device *dev)
3800 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3801 linkwatch_fire_event(dev);
3805 * netif_dormant - test if device is dormant
3806 * @dev: network device
3808 * Check if device is dormant.
3810 static inline bool netif_dormant(const struct net_device *dev)
3812 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3817 * netif_oper_up - test if device is operational
3818 * @dev: network device
3820 * Check if carrier is operational
3822 static inline bool netif_oper_up(const struct net_device *dev)
3824 return (dev->operstate == IF_OPER_UP ||
3825 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3829 * netif_device_present - is device available or removed
3830 * @dev: network device
3832 * Check if device has not been removed from system.
3834 static inline bool netif_device_present(struct net_device *dev)
3836 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3839 void netif_device_detach(struct net_device *dev);
3841 void netif_device_attach(struct net_device *dev);
3844 * Network interface message level settings
3848 NETIF_MSG_DRV = 0x0001,
3849 NETIF_MSG_PROBE = 0x0002,
3850 NETIF_MSG_LINK = 0x0004,
3851 NETIF_MSG_TIMER = 0x0008,
3852 NETIF_MSG_IFDOWN = 0x0010,
3853 NETIF_MSG_IFUP = 0x0020,
3854 NETIF_MSG_RX_ERR = 0x0040,
3855 NETIF_MSG_TX_ERR = 0x0080,
3856 NETIF_MSG_TX_QUEUED = 0x0100,
3857 NETIF_MSG_INTR = 0x0200,
3858 NETIF_MSG_TX_DONE = 0x0400,
3859 NETIF_MSG_RX_STATUS = 0x0800,
3860 NETIF_MSG_PKTDATA = 0x1000,
3861 NETIF_MSG_HW = 0x2000,
3862 NETIF_MSG_WOL = 0x4000,
3865 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3866 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3867 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3868 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3869 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3870 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3871 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3872 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3873 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3874 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3875 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3876 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3877 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3878 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3879 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3881 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3884 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3885 return default_msg_enable_bits;
3886 if (debug_value == 0) /* no output */
3888 /* set low N bits */
3889 return (1U << debug_value) - 1;
3892 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3894 spin_lock(&txq->_xmit_lock);
3895 txq->xmit_lock_owner = cpu;
3898 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3900 __acquire(&txq->_xmit_lock);
3904 static inline void __netif_tx_release(struct netdev_queue *txq)
3906 __release(&txq->_xmit_lock);
3909 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3911 spin_lock_bh(&txq->_xmit_lock);
3912 txq->xmit_lock_owner = smp_processor_id();
3915 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3917 bool ok = spin_trylock(&txq->_xmit_lock);
3919 txq->xmit_lock_owner = smp_processor_id();
3923 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3925 txq->xmit_lock_owner = -1;
3926 spin_unlock(&txq->_xmit_lock);
3929 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3931 txq->xmit_lock_owner = -1;
3932 spin_unlock_bh(&txq->_xmit_lock);
3935 static inline void txq_trans_update(struct netdev_queue *txq)
3937 if (txq->xmit_lock_owner != -1)
3938 txq->trans_start = jiffies;
3941 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3942 static inline void netif_trans_update(struct net_device *dev)
3944 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3946 if (txq->trans_start != jiffies)
3947 txq->trans_start = jiffies;
3951 * netif_tx_lock - grab network device transmit lock
3952 * @dev: network device
3954 * Get network device transmit lock
3956 static inline void netif_tx_lock(struct net_device *dev)
3961 spin_lock(&dev->tx_global_lock);
3962 cpu = smp_processor_id();
3963 for (i = 0; i < dev->num_tx_queues; i++) {
3964 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3966 /* We are the only thread of execution doing a
3967 * freeze, but we have to grab the _xmit_lock in
3968 * order to synchronize with threads which are in
3969 * the ->hard_start_xmit() handler and already
3970 * checked the frozen bit.
3972 __netif_tx_lock(txq, cpu);
3973 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3974 __netif_tx_unlock(txq);
3978 static inline void netif_tx_lock_bh(struct net_device *dev)
3984 static inline void netif_tx_unlock(struct net_device *dev)
3988 for (i = 0; i < dev->num_tx_queues; i++) {
3989 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3991 /* No need to grab the _xmit_lock here. If the
3992 * queue is not stopped for another reason, we
3995 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3996 netif_schedule_queue(txq);
3998 spin_unlock(&dev->tx_global_lock);
4001 static inline void netif_tx_unlock_bh(struct net_device *dev)
4003 netif_tx_unlock(dev);
4007 #define HARD_TX_LOCK(dev, txq, cpu) { \
4008 if ((dev->features & NETIF_F_LLTX) == 0) { \
4009 __netif_tx_lock(txq, cpu); \
4011 __netif_tx_acquire(txq); \
4015 #define HARD_TX_TRYLOCK(dev, txq) \
4016 (((dev->features & NETIF_F_LLTX) == 0) ? \
4017 __netif_tx_trylock(txq) : \
4018 __netif_tx_acquire(txq))
4020 #define HARD_TX_UNLOCK(dev, txq) { \
4021 if ((dev->features & NETIF_F_LLTX) == 0) { \
4022 __netif_tx_unlock(txq); \
4024 __netif_tx_release(txq); \
4028 static inline void netif_tx_disable(struct net_device *dev)
4034 cpu = smp_processor_id();
4035 for (i = 0; i < dev->num_tx_queues; i++) {
4036 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4038 __netif_tx_lock(txq, cpu);
4039 netif_tx_stop_queue(txq);
4040 __netif_tx_unlock(txq);
4045 static inline void netif_addr_lock(struct net_device *dev)
4047 spin_lock(&dev->addr_list_lock);
4050 static inline void netif_addr_lock_nested(struct net_device *dev)
4052 int subclass = SINGLE_DEPTH_NESTING;
4054 if (dev->netdev_ops->ndo_get_lock_subclass)
4055 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
4057 spin_lock_nested(&dev->addr_list_lock, subclass);
4060 static inline void netif_addr_lock_bh(struct net_device *dev)
4062 spin_lock_bh(&dev->addr_list_lock);
4065 static inline void netif_addr_unlock(struct net_device *dev)
4067 spin_unlock(&dev->addr_list_lock);
4070 static inline void netif_addr_unlock_bh(struct net_device *dev)
4072 spin_unlock_bh(&dev->addr_list_lock);
4076 * dev_addrs walker. Should be used only for read access. Call with
4077 * rcu_read_lock held.
4079 #define for_each_dev_addr(dev, ha) \
4080 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4082 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4084 void ether_setup(struct net_device *dev);
4086 /* Support for loadable net-drivers */
4087 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4088 unsigned char name_assign_type,
4089 void (*setup)(struct net_device *),
4090 unsigned int txqs, unsigned int rxqs);
4091 int dev_get_valid_name(struct net *net, struct net_device *dev,
4094 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4095 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4097 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4098 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4101 int register_netdev(struct net_device *dev);
4102 void unregister_netdev(struct net_device *dev);
4104 /* General hardware address lists handling functions */
4105 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4106 struct netdev_hw_addr_list *from_list, int addr_len);
4107 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4108 struct netdev_hw_addr_list *from_list, int addr_len);
4109 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4110 struct net_device *dev,
4111 int (*sync)(struct net_device *, const unsigned char *),
4112 int (*unsync)(struct net_device *,
4113 const unsigned char *));
4114 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4115 struct net_device *dev,
4116 int (*sync)(struct net_device *,
4117 const unsigned char *, int),
4118 int (*unsync)(struct net_device *,
4119 const unsigned char *, int));
4120 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4121 struct net_device *dev,
4122 int (*unsync)(struct net_device *,
4123 const unsigned char *, int));
4124 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4125 struct net_device *dev,
4126 int (*unsync)(struct net_device *,
4127 const unsigned char *));
4128 void __hw_addr_init(struct netdev_hw_addr_list *list);
4130 /* Functions used for device addresses handling */
4131 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4132 unsigned char addr_type);
4133 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4134 unsigned char addr_type);
4135 void dev_addr_flush(struct net_device *dev);
4136 int dev_addr_init(struct net_device *dev);
4138 /* Functions used for unicast addresses handling */
4139 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4140 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4141 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4142 int dev_uc_sync(struct net_device *to, struct net_device *from);
4143 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4144 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4145 void dev_uc_flush(struct net_device *dev);
4146 void dev_uc_init(struct net_device *dev);
4149 * __dev_uc_sync - Synchonize device's unicast list
4150 * @dev: device to sync
4151 * @sync: function to call if address should be added
4152 * @unsync: function to call if address should be removed
4154 * Add newly added addresses to the interface, and release
4155 * addresses that have been deleted.
4157 static inline int __dev_uc_sync(struct net_device *dev,
4158 int (*sync)(struct net_device *,
4159 const unsigned char *),
4160 int (*unsync)(struct net_device *,
4161 const unsigned char *))
4163 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4167 * __dev_uc_unsync - Remove synchronized addresses from device
4168 * @dev: device to sync
4169 * @unsync: function to call if address should be removed
4171 * Remove all addresses that were added to the device by dev_uc_sync().
4173 static inline void __dev_uc_unsync(struct net_device *dev,
4174 int (*unsync)(struct net_device *,
4175 const unsigned char *))
4177 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4180 /* Functions used for multicast addresses handling */
4181 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4182 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4183 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4184 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4185 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4186 int dev_mc_sync(struct net_device *to, struct net_device *from);
4187 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4188 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4189 void dev_mc_flush(struct net_device *dev);
4190 void dev_mc_init(struct net_device *dev);
4193 * __dev_mc_sync - Synchonize device's multicast list
4194 * @dev: device to sync
4195 * @sync: function to call if address should be added
4196 * @unsync: function to call if address should be removed
4198 * Add newly added addresses to the interface, and release
4199 * addresses that have been deleted.
4201 static inline int __dev_mc_sync(struct net_device *dev,
4202 int (*sync)(struct net_device *,
4203 const unsigned char *),
4204 int (*unsync)(struct net_device *,
4205 const unsigned char *))
4207 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4211 * __dev_mc_unsync - Remove synchronized addresses from device
4212 * @dev: device to sync
4213 * @unsync: function to call if address should be removed
4215 * Remove all addresses that were added to the device by dev_mc_sync().
4217 static inline void __dev_mc_unsync(struct net_device *dev,
4218 int (*unsync)(struct net_device *,
4219 const unsigned char *))
4221 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4224 /* Functions used for secondary unicast and multicast support */
4225 void dev_set_rx_mode(struct net_device *dev);
4226 void __dev_set_rx_mode(struct net_device *dev);
4227 int dev_set_promiscuity(struct net_device *dev, int inc);
4228 int dev_set_allmulti(struct net_device *dev, int inc);
4229 void netdev_state_change(struct net_device *dev);
4230 void netdev_notify_peers(struct net_device *dev);
4231 void netdev_features_change(struct net_device *dev);
4232 /* Load a device via the kmod */
4233 void dev_load(struct net *net, const char *name);
4234 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4235 struct rtnl_link_stats64 *storage);
4236 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4237 const struct net_device_stats *netdev_stats);
4239 extern int netdev_max_backlog;
4240 extern int netdev_tstamp_prequeue;
4241 extern int weight_p;
4242 extern int dev_weight_rx_bias;
4243 extern int dev_weight_tx_bias;
4244 extern int dev_rx_weight;
4245 extern int dev_tx_weight;
4247 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4248 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4249 struct list_head **iter);
4250 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4251 struct list_head **iter);
4253 /* iterate through upper list, must be called under RCU read lock */
4254 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4255 for (iter = &(dev)->adj_list.upper, \
4256 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4258 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4260 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4261 int (*fn)(struct net_device *upper_dev,
4265 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4266 struct net_device *upper_dev);
4268 bool netdev_has_any_upper_dev(struct net_device *dev);
4270 void *netdev_lower_get_next_private(struct net_device *dev,
4271 struct list_head **iter);
4272 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4273 struct list_head **iter);
4275 #define netdev_for_each_lower_private(dev, priv, iter) \
4276 for (iter = (dev)->adj_list.lower.next, \
4277 priv = netdev_lower_get_next_private(dev, &(iter)); \
4279 priv = netdev_lower_get_next_private(dev, &(iter)))
4281 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4282 for (iter = &(dev)->adj_list.lower, \
4283 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4285 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4287 void *netdev_lower_get_next(struct net_device *dev,
4288 struct list_head **iter);
4290 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4291 for (iter = (dev)->adj_list.lower.next, \
4292 ldev = netdev_lower_get_next(dev, &(iter)); \
4294 ldev = netdev_lower_get_next(dev, &(iter)))
4296 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4297 struct list_head **iter);
4298 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4299 struct list_head **iter);
4301 int netdev_walk_all_lower_dev(struct net_device *dev,
4302 int (*fn)(struct net_device *lower_dev,
4305 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4306 int (*fn)(struct net_device *lower_dev,
4310 void *netdev_adjacent_get_private(struct list_head *adj_list);
4311 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4312 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4313 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4314 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4315 struct netlink_ext_ack *extack);
4316 int netdev_master_upper_dev_link(struct net_device *dev,
4317 struct net_device *upper_dev,
4318 void *upper_priv, void *upper_info,
4319 struct netlink_ext_ack *extack);
4320 void netdev_upper_dev_unlink(struct net_device *dev,
4321 struct net_device *upper_dev);
4322 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4323 void *netdev_lower_dev_get_private(struct net_device *dev,
4324 struct net_device *lower_dev);
4325 void netdev_lower_state_changed(struct net_device *lower_dev,
4326 void *lower_state_info);
4328 /* RSS keys are 40 or 52 bytes long */
4329 #define NETDEV_RSS_KEY_LEN 52
4330 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4331 void netdev_rss_key_fill(void *buffer, size_t len);
4333 int dev_get_nest_level(struct net_device *dev);
4334 int skb_checksum_help(struct sk_buff *skb);
4335 int skb_crc32c_csum_help(struct sk_buff *skb);
4336 int skb_csum_hwoffload_help(struct sk_buff *skb,
4337 const netdev_features_t features);
4339 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4340 netdev_features_t features, bool tx_path);
4341 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4342 netdev_features_t features);
4344 struct netdev_bonding_info {
4349 struct netdev_notifier_bonding_info {
4350 struct netdev_notifier_info info; /* must be first */
4351 struct netdev_bonding_info bonding_info;
4354 void netdev_bonding_info_change(struct net_device *dev,
4355 struct netdev_bonding_info *bonding_info);
4358 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4360 return __skb_gso_segment(skb, features, true);
4362 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4364 static inline bool can_checksum_protocol(netdev_features_t features,
4367 if (protocol == htons(ETH_P_FCOE))
4368 return !!(features & NETIF_F_FCOE_CRC);
4370 /* Assume this is an IP checksum (not SCTP CRC) */
4372 if (features & NETIF_F_HW_CSUM) {
4373 /* Can checksum everything */
4378 case htons(ETH_P_IP):
4379 return !!(features & NETIF_F_IP_CSUM);
4380 case htons(ETH_P_IPV6):
4381 return !!(features & NETIF_F_IPV6_CSUM);
4388 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4390 static inline void netdev_rx_csum_fault(struct net_device *dev,
4391 struct sk_buff *skb)
4395 /* rx skb timestamps */
4396 void net_enable_timestamp(void);
4397 void net_disable_timestamp(void);
4399 #ifdef CONFIG_PROC_FS
4400 int __init dev_proc_init(void);
4402 #define dev_proc_init() 0
4405 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4406 struct sk_buff *skb, struct net_device *dev,
4409 __this_cpu_write(softnet_data.xmit.more, more);
4410 return ops->ndo_start_xmit(skb, dev);
4413 static inline bool netdev_xmit_more(void)
4415 return __this_cpu_read(softnet_data.xmit.more);
4418 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4419 struct netdev_queue *txq, bool more)
4421 const struct net_device_ops *ops = dev->netdev_ops;
4424 rc = __netdev_start_xmit(ops, skb, dev, more);
4425 if (rc == NETDEV_TX_OK)
4426 txq_trans_update(txq);
4431 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4433 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4436 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4438 return netdev_class_create_file_ns(class_attr, NULL);
4441 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4443 netdev_class_remove_file_ns(class_attr, NULL);
4446 extern const struct kobj_ns_type_operations net_ns_type_operations;
4448 const char *netdev_drivername(const struct net_device *dev);
4450 void linkwatch_run_queue(void);
4452 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4453 netdev_features_t f2)
4455 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4456 if (f1 & NETIF_F_HW_CSUM)
4457 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4459 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4465 static inline netdev_features_t netdev_get_wanted_features(
4466 struct net_device *dev)
4468 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4470 netdev_features_t netdev_increment_features(netdev_features_t all,
4471 netdev_features_t one, netdev_features_t mask);
4473 /* Allow TSO being used on stacked device :
4474 * Performing the GSO segmentation before last device
4475 * is a performance improvement.
4477 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4478 netdev_features_t mask)
4480 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4483 int __netdev_update_features(struct net_device *dev);
4484 void netdev_update_features(struct net_device *dev);
4485 void netdev_change_features(struct net_device *dev);
4487 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4488 struct net_device *dev);
4490 netdev_features_t passthru_features_check(struct sk_buff *skb,
4491 struct net_device *dev,
4492 netdev_features_t features);
4493 netdev_features_t netif_skb_features(struct sk_buff *skb);
4495 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4497 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4499 /* check flags correspondence */
4500 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4501 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4502 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4503 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4504 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4505 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4506 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4507 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4508 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4509 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4510 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4511 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4512 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4513 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4514 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4515 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4516 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4517 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4519 return (features & feature) == feature;
4522 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4524 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4525 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4528 static inline bool netif_needs_gso(struct sk_buff *skb,
4529 netdev_features_t features)
4531 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4532 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4533 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4536 static inline void netif_set_gso_max_size(struct net_device *dev,
4539 dev->gso_max_size = size;
4542 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4543 int pulled_hlen, u16 mac_offset,
4546 skb->protocol = protocol;
4547 skb->encapsulation = 1;
4548 skb_push(skb, pulled_hlen);
4549 skb_reset_transport_header(skb);
4550 skb->mac_header = mac_offset;
4551 skb->network_header = skb->mac_header + mac_len;
4552 skb->mac_len = mac_len;
4555 static inline bool netif_is_macsec(const struct net_device *dev)
4557 return dev->priv_flags & IFF_MACSEC;
4560 static inline bool netif_is_macvlan(const struct net_device *dev)
4562 return dev->priv_flags & IFF_MACVLAN;
4565 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4567 return dev->priv_flags & IFF_MACVLAN_PORT;
4570 static inline bool netif_is_bond_master(const struct net_device *dev)
4572 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4575 static inline bool netif_is_bond_slave(const struct net_device *dev)
4577 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4580 static inline bool netif_supports_nofcs(struct net_device *dev)
4582 return dev->priv_flags & IFF_SUPP_NOFCS;
4585 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4587 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4590 static inline bool netif_is_l3_master(const struct net_device *dev)
4592 return dev->priv_flags & IFF_L3MDEV_MASTER;
4595 static inline bool netif_is_l3_slave(const struct net_device *dev)
4597 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4600 static inline bool netif_is_bridge_master(const struct net_device *dev)
4602 return dev->priv_flags & IFF_EBRIDGE;
4605 static inline bool netif_is_bridge_port(const struct net_device *dev)
4607 return dev->priv_flags & IFF_BRIDGE_PORT;
4610 static inline bool netif_is_ovs_master(const struct net_device *dev)
4612 return dev->priv_flags & IFF_OPENVSWITCH;
4615 static inline bool netif_is_ovs_port(const struct net_device *dev)
4617 return dev->priv_flags & IFF_OVS_DATAPATH;
4620 static inline bool netif_is_team_master(const struct net_device *dev)
4622 return dev->priv_flags & IFF_TEAM;
4625 static inline bool netif_is_team_port(const struct net_device *dev)
4627 return dev->priv_flags & IFF_TEAM_PORT;
4630 static inline bool netif_is_lag_master(const struct net_device *dev)
4632 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4635 static inline bool netif_is_lag_port(const struct net_device *dev)
4637 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4640 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4642 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4645 static inline bool netif_is_failover(const struct net_device *dev)
4647 return dev->priv_flags & IFF_FAILOVER;
4650 static inline bool netif_is_failover_slave(const struct net_device *dev)
4652 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4655 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4656 static inline void netif_keep_dst(struct net_device *dev)
4658 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4661 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4662 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4664 /* TODO: reserve and use an additional IFF bit, if we get more users */
4665 return dev->priv_flags & IFF_MACSEC;
4668 extern struct pernet_operations __net_initdata loopback_net_ops;
4670 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4672 /* netdev_printk helpers, similar to dev_printk */
4674 static inline const char *netdev_name(const struct net_device *dev)
4676 if (!dev->name[0] || strchr(dev->name, '%'))
4677 return "(unnamed net_device)";
4681 static inline bool netdev_unregistering(const struct net_device *dev)
4683 return dev->reg_state == NETREG_UNREGISTERING;
4686 static inline const char *netdev_reg_state(const struct net_device *dev)
4688 switch (dev->reg_state) {
4689 case NETREG_UNINITIALIZED: return " (uninitialized)";
4690 case NETREG_REGISTERED: return "";
4691 case NETREG_UNREGISTERING: return " (unregistering)";
4692 case NETREG_UNREGISTERED: return " (unregistered)";
4693 case NETREG_RELEASED: return " (released)";
4694 case NETREG_DUMMY: return " (dummy)";
4697 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4698 return " (unknown)";
4701 __printf(3, 4) __cold
4702 void netdev_printk(const char *level, const struct net_device *dev,
4703 const char *format, ...);
4704 __printf(2, 3) __cold
4705 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4706 __printf(2, 3) __cold
4707 void netdev_alert(const struct net_device *dev, const char *format, ...);
4708 __printf(2, 3) __cold
4709 void netdev_crit(const struct net_device *dev, const char *format, ...);
4710 __printf(2, 3) __cold
4711 void netdev_err(const struct net_device *dev, const char *format, ...);
4712 __printf(2, 3) __cold
4713 void netdev_warn(const struct net_device *dev, const char *format, ...);
4714 __printf(2, 3) __cold
4715 void netdev_notice(const struct net_device *dev, const char *format, ...);
4716 __printf(2, 3) __cold
4717 void netdev_info(const struct net_device *dev, const char *format, ...);
4719 #define netdev_level_once(level, dev, fmt, ...) \
4721 static bool __print_once __read_mostly; \
4723 if (!__print_once) { \
4724 __print_once = true; \
4725 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4729 #define netdev_emerg_once(dev, fmt, ...) \
4730 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4731 #define netdev_alert_once(dev, fmt, ...) \
4732 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4733 #define netdev_crit_once(dev, fmt, ...) \
4734 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4735 #define netdev_err_once(dev, fmt, ...) \
4736 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4737 #define netdev_warn_once(dev, fmt, ...) \
4738 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4739 #define netdev_notice_once(dev, fmt, ...) \
4740 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4741 #define netdev_info_once(dev, fmt, ...) \
4742 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4744 #define MODULE_ALIAS_NETDEV(device) \
4745 MODULE_ALIAS("netdev-" device)
4747 #if defined(CONFIG_DYNAMIC_DEBUG)
4748 #define netdev_dbg(__dev, format, args...) \
4750 dynamic_netdev_dbg(__dev, format, ##args); \
4752 #elif defined(DEBUG)
4753 #define netdev_dbg(__dev, format, args...) \
4754 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4756 #define netdev_dbg(__dev, format, args...) \
4759 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4763 #if defined(VERBOSE_DEBUG)
4764 #define netdev_vdbg netdev_dbg
4767 #define netdev_vdbg(dev, format, args...) \
4770 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4776 * netdev_WARN() acts like dev_printk(), but with the key difference
4777 * of using a WARN/WARN_ON to get the message out, including the
4778 * file/line information and a backtrace.
4780 #define netdev_WARN(dev, format, args...) \
4781 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4782 netdev_reg_state(dev), ##args)
4784 #define netdev_WARN_ONCE(dev, format, args...) \
4785 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4786 netdev_reg_state(dev), ##args)
4788 /* netif printk helpers, similar to netdev_printk */
4790 #define netif_printk(priv, type, level, dev, fmt, args...) \
4792 if (netif_msg_##type(priv)) \
4793 netdev_printk(level, (dev), fmt, ##args); \
4796 #define netif_level(level, priv, type, dev, fmt, args...) \
4798 if (netif_msg_##type(priv)) \
4799 netdev_##level(dev, fmt, ##args); \
4802 #define netif_emerg(priv, type, dev, fmt, args...) \
4803 netif_level(emerg, priv, type, dev, fmt, ##args)
4804 #define netif_alert(priv, type, dev, fmt, args...) \
4805 netif_level(alert, priv, type, dev, fmt, ##args)
4806 #define netif_crit(priv, type, dev, fmt, args...) \
4807 netif_level(crit, priv, type, dev, fmt, ##args)
4808 #define netif_err(priv, type, dev, fmt, args...) \
4809 netif_level(err, priv, type, dev, fmt, ##args)
4810 #define netif_warn(priv, type, dev, fmt, args...) \
4811 netif_level(warn, priv, type, dev, fmt, ##args)
4812 #define netif_notice(priv, type, dev, fmt, args...) \
4813 netif_level(notice, priv, type, dev, fmt, ##args)
4814 #define netif_info(priv, type, dev, fmt, args...) \
4815 netif_level(info, priv, type, dev, fmt, ##args)
4817 #if defined(CONFIG_DYNAMIC_DEBUG)
4818 #define netif_dbg(priv, type, netdev, format, args...) \
4820 if (netif_msg_##type(priv)) \
4821 dynamic_netdev_dbg(netdev, format, ##args); \
4823 #elif defined(DEBUG)
4824 #define netif_dbg(priv, type, dev, format, args...) \
4825 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4827 #define netif_dbg(priv, type, dev, format, args...) \
4830 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4835 /* if @cond then downgrade to debug, else print at @level */
4836 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4839 netif_dbg(priv, type, netdev, fmt, ##args); \
4841 netif_ ## level(priv, type, netdev, fmt, ##args); \
4844 #if defined(VERBOSE_DEBUG)
4845 #define netif_vdbg netif_dbg
4847 #define netif_vdbg(priv, type, dev, format, args...) \
4850 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4856 * The list of packet types we will receive (as opposed to discard)
4857 * and the routines to invoke.
4859 * Why 16. Because with 16 the only overlap we get on a hash of the
4860 * low nibble of the protocol value is RARP/SNAP/X.25.
4874 #define PTYPE_HASH_SIZE (16)
4875 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4877 #endif /* _LINUX_NETDEVICE_H */