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 rps_needed;
198 extern struct static_key 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);
917 #if IS_ENABLED(CONFIG_TLS_DEVICE)
918 enum tls_offload_ctx_dir {
919 TLS_OFFLOAD_CTX_DIR_RX,
920 TLS_OFFLOAD_CTX_DIR_TX,
923 struct tls_crypto_info;
927 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
928 enum tls_offload_ctx_dir direction,
929 struct tls_crypto_info *crypto_info,
930 u32 start_offload_tcp_sn);
931 void (*tls_dev_del)(struct net_device *netdev,
932 struct tls_context *ctx,
933 enum tls_offload_ctx_dir direction);
934 void (*tls_dev_resync_rx)(struct net_device *netdev,
935 struct sock *sk, u32 seq, u64 rcd_sn);
940 struct rcu_head rcuhead;
947 * This structure defines the management hooks for network devices.
948 * The following hooks can be defined; unless noted otherwise, they are
949 * optional and can be filled with a null pointer.
951 * int (*ndo_init)(struct net_device *dev);
952 * This function is called once when a network device is registered.
953 * The network device can use this for any late stage initialization
954 * or semantic validation. It can fail with an error code which will
955 * be propagated back to register_netdev.
957 * void (*ndo_uninit)(struct net_device *dev);
958 * This function is called when device is unregistered or when registration
959 * fails. It is not called if init fails.
961 * int (*ndo_open)(struct net_device *dev);
962 * This function is called when a network device transitions to the up
965 * int (*ndo_stop)(struct net_device *dev);
966 * This function is called when a network device transitions to the down
969 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
970 * struct net_device *dev);
971 * Called when a packet needs to be transmitted.
972 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
973 * the queue before that can happen; it's for obsolete devices and weird
974 * corner cases, but the stack really does a non-trivial amount
975 * of useless work if you return NETDEV_TX_BUSY.
976 * Required; cannot be NULL.
978 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
979 * struct net_device *dev
980 * netdev_features_t features);
981 * Called by core transmit path to determine if device is capable of
982 * performing offload operations on a given packet. This is to give
983 * the device an opportunity to implement any restrictions that cannot
984 * be otherwise expressed by feature flags. The check is called with
985 * the set of features that the stack has calculated and it returns
986 * those the driver believes to be appropriate.
988 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
989 * struct net_device *sb_dev);
990 * Called to decide which queue to use when device supports multiple
993 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
994 * This function is called to allow device receiver to make
995 * changes to configuration when multicast or promiscuous is enabled.
997 * void (*ndo_set_rx_mode)(struct net_device *dev);
998 * This function is called device changes address list filtering.
999 * If driver handles unicast address filtering, it should set
1000 * IFF_UNICAST_FLT in its priv_flags.
1002 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1003 * This function is called when the Media Access Control address
1004 * needs to be changed. If this interface is not defined, the
1005 * MAC address can not be changed.
1007 * int (*ndo_validate_addr)(struct net_device *dev);
1008 * Test if Media Access Control address is valid for the device.
1010 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1011 * Called when a user requests an ioctl which can't be handled by
1012 * the generic interface code. If not defined ioctls return
1013 * not supported error code.
1015 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1016 * Used to set network devices bus interface parameters. This interface
1017 * is retained for legacy reasons; new devices should use the bus
1018 * interface (PCI) for low level management.
1020 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1021 * Called when a user wants to change the Maximum Transfer Unit
1024 * void (*ndo_tx_timeout)(struct net_device *dev);
1025 * Callback used when the transmitter has not made any progress
1026 * for dev->watchdog ticks.
1028 * void (*ndo_get_stats64)(struct net_device *dev,
1029 * struct rtnl_link_stats64 *storage);
1030 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1031 * Called when a user wants to get the network device usage
1032 * statistics. Drivers must do one of the following:
1033 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1034 * rtnl_link_stats64 structure passed by the caller.
1035 * 2. Define @ndo_get_stats to update a net_device_stats structure
1036 * (which should normally be dev->stats) and return a pointer to
1037 * it. The structure may be changed asynchronously only if each
1038 * field is written atomically.
1039 * 3. Update dev->stats asynchronously and atomically, and define
1040 * neither operation.
1042 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1043 * Return true if this device supports offload stats of this attr_id.
1045 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1047 * Get statistics for offload operations by attr_id. Write it into the
1048 * attr_data pointer.
1050 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1051 * If device supports VLAN filtering this function is called when a
1052 * VLAN id is registered.
1054 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1055 * If device supports VLAN filtering this function is called when a
1056 * VLAN id is unregistered.
1058 * void (*ndo_poll_controller)(struct net_device *dev);
1060 * SR-IOV management functions.
1061 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1062 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1063 * u8 qos, __be16 proto);
1064 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1066 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1067 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1068 * int (*ndo_get_vf_config)(struct net_device *dev,
1069 * int vf, struct ifla_vf_info *ivf);
1070 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1071 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1072 * struct nlattr *port[]);
1074 * Enable or disable the VF ability to query its RSS Redirection Table and
1075 * Hash Key. This is needed since on some devices VF share this information
1076 * with PF and querying it may introduce a theoretical security risk.
1077 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1078 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1079 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1081 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1082 * This is always called from the stack with the rtnl lock held and netif
1083 * tx queues stopped. This allows the netdevice to perform queue
1084 * management safely.
1086 * Fiber Channel over Ethernet (FCoE) offload functions.
1087 * int (*ndo_fcoe_enable)(struct net_device *dev);
1088 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1089 * so the underlying device can perform whatever needed configuration or
1090 * initialization to support acceleration of FCoE traffic.
1092 * int (*ndo_fcoe_disable)(struct net_device *dev);
1093 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1094 * so the underlying device can perform whatever needed clean-ups to
1095 * stop supporting acceleration of FCoE traffic.
1097 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1098 * struct scatterlist *sgl, unsigned int sgc);
1099 * Called when the FCoE Initiator wants to initialize an I/O that
1100 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1101 * perform necessary setup and returns 1 to indicate the device is set up
1102 * successfully to perform DDP on this I/O, otherwise this returns 0.
1104 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1105 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1106 * indicated by the FC exchange id 'xid', so the underlying device can
1107 * clean up and reuse resources for later DDP requests.
1109 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1110 * struct scatterlist *sgl, unsigned int sgc);
1111 * Called when the FCoE Target wants to initialize an I/O that
1112 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1113 * perform necessary setup and returns 1 to indicate the device is set up
1114 * successfully to perform DDP on this I/O, otherwise this returns 0.
1116 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1117 * struct netdev_fcoe_hbainfo *hbainfo);
1118 * Called when the FCoE Protocol stack wants information on the underlying
1119 * device. This information is utilized by the FCoE protocol stack to
1120 * register attributes with Fiber Channel management service as per the
1121 * FC-GS Fabric Device Management Information(FDMI) specification.
1123 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1124 * Called when the underlying device wants to override default World Wide
1125 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1126 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1127 * protocol stack to use.
1130 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1131 * u16 rxq_index, u32 flow_id);
1132 * Set hardware filter for RFS. rxq_index is the target queue index;
1133 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1134 * Return the filter ID on success, or a negative error code.
1136 * Slave management functions (for bridge, bonding, etc).
1137 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1138 * Called to make another netdev an underling.
1140 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1141 * Called to release previously enslaved netdev.
1143 * Feature/offload setting functions.
1144 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1145 * netdev_features_t features);
1146 * Adjusts the requested feature flags according to device-specific
1147 * constraints, and returns the resulting flags. Must not modify
1150 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1151 * Called to update device configuration to new features. Passed
1152 * feature set might be less than what was returned by ndo_fix_features()).
1153 * Must return >0 or -errno if it changed dev->features itself.
1155 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1156 * struct net_device *dev,
1157 * const unsigned char *addr, u16 vid, u16 flags,
1158 * struct netlink_ext_ack *extack);
1159 * Adds an FDB entry to dev for addr.
1160 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1161 * struct net_device *dev,
1162 * const unsigned char *addr, u16 vid)
1163 * Deletes the FDB entry from dev coresponding to addr.
1164 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1165 * struct net_device *dev, struct net_device *filter_dev,
1167 * Used to add FDB entries to dump requests. Implementers should add
1168 * entries to skb and update idx with the number of entries.
1170 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1171 * u16 flags, struct netlink_ext_ack *extack)
1172 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1173 * struct net_device *dev, u32 filter_mask,
1175 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1178 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1179 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1180 * which do not represent real hardware may define this to allow their
1181 * userspace components to manage their virtual carrier state. Devices
1182 * that determine carrier state from physical hardware properties (eg
1183 * network cables) or protocol-dependent mechanisms (eg
1184 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1186 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1187 * struct netdev_phys_item_id *ppid);
1188 * Called to get ID of physical port of this device. If driver does
1189 * not implement this, it is assumed that the hw is not able to have
1190 * multiple net devices on single physical port.
1192 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1193 * struct netdev_phys_item_id *ppid)
1194 * Called to get the parent ID of the physical port of this device.
1196 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1197 * struct udp_tunnel_info *ti);
1198 * Called by UDP tunnel to notify a driver about the UDP port and socket
1199 * address family that a UDP tunnel is listnening to. It is called only
1200 * when a new port starts listening. The operation is protected by the
1203 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1204 * struct udp_tunnel_info *ti);
1205 * Called by UDP tunnel to notify the driver about a UDP port and socket
1206 * address family that the UDP tunnel is not listening to anymore. The
1207 * operation is protected by the RTNL.
1209 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1210 * struct net_device *dev)
1211 * Called by upper layer devices to accelerate switching or other
1212 * station functionality into hardware. 'pdev is the lowerdev
1213 * to use for the offload and 'dev' is the net device that will
1214 * back the offload. Returns a pointer to the private structure
1215 * the upper layer will maintain.
1216 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1217 * Called by upper layer device to delete the station created
1218 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1219 * the station and priv is the structure returned by the add
1221 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1222 * int queue_index, u32 maxrate);
1223 * Called when a user wants to set a max-rate limitation of specific
1225 * int (*ndo_get_iflink)(const struct net_device *dev);
1226 * Called to get the iflink value of this device.
1227 * void (*ndo_change_proto_down)(struct net_device *dev,
1229 * This function is used to pass protocol port error state information
1230 * to the switch driver. The switch driver can react to the proto_down
1231 * by doing a phys down on the associated switch port.
1232 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1233 * This function is used to get egress tunnel information for given skb.
1234 * This is useful for retrieving outer tunnel header parameters while
1236 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1237 * This function is used to specify the headroom that the skb must
1238 * consider when allocation skb during packet reception. Setting
1239 * appropriate rx headroom value allows avoiding skb head copy on
1240 * forward. Setting a negative value resets the rx headroom to the
1242 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1243 * This function is used to set or query state related to XDP on the
1244 * netdevice and manage BPF offload. See definition of
1245 * enum bpf_netdev_command for details.
1246 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1248 * This function is used to submit @n XDP packets for transmit on a
1249 * netdevice. Returns number of frames successfully transmitted, frames
1250 * that got dropped are freed/returned via xdp_return_frame().
1251 * Returns negative number, means general error invoking ndo, meaning
1252 * no frames were xmit'ed and core-caller will free all frames.
1253 * struct devlink *(*ndo_get_devlink)(struct net_device *dev);
1254 * Get devlink instance associated with a given netdev.
1255 * Called with a reference on the netdevice and devlink locks only,
1256 * rtnl_lock is not held.
1258 struct net_device_ops {
1259 int (*ndo_init)(struct net_device *dev);
1260 void (*ndo_uninit)(struct net_device *dev);
1261 int (*ndo_open)(struct net_device *dev);
1262 int (*ndo_stop)(struct net_device *dev);
1263 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1264 struct net_device *dev);
1265 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1266 struct net_device *dev,
1267 netdev_features_t features);
1268 u16 (*ndo_select_queue)(struct net_device *dev,
1269 struct sk_buff *skb,
1270 struct net_device *sb_dev);
1271 void (*ndo_change_rx_flags)(struct net_device *dev,
1273 void (*ndo_set_rx_mode)(struct net_device *dev);
1274 int (*ndo_set_mac_address)(struct net_device *dev,
1276 int (*ndo_validate_addr)(struct net_device *dev);
1277 int (*ndo_do_ioctl)(struct net_device *dev,
1278 struct ifreq *ifr, int cmd);
1279 int (*ndo_set_config)(struct net_device *dev,
1281 int (*ndo_change_mtu)(struct net_device *dev,
1283 int (*ndo_neigh_setup)(struct net_device *dev,
1284 struct neigh_parms *);
1285 void (*ndo_tx_timeout) (struct net_device *dev);
1287 void (*ndo_get_stats64)(struct net_device *dev,
1288 struct rtnl_link_stats64 *storage);
1289 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1290 int (*ndo_get_offload_stats)(int attr_id,
1291 const struct net_device *dev,
1293 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1295 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1296 __be16 proto, u16 vid);
1297 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1298 __be16 proto, u16 vid);
1299 #ifdef CONFIG_NET_POLL_CONTROLLER
1300 void (*ndo_poll_controller)(struct net_device *dev);
1301 int (*ndo_netpoll_setup)(struct net_device *dev,
1302 struct netpoll_info *info);
1303 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1305 int (*ndo_set_vf_mac)(struct net_device *dev,
1306 int queue, u8 *mac);
1307 int (*ndo_set_vf_vlan)(struct net_device *dev,
1308 int queue, u16 vlan,
1309 u8 qos, __be16 proto);
1310 int (*ndo_set_vf_rate)(struct net_device *dev,
1311 int vf, int min_tx_rate,
1313 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1314 int vf, bool setting);
1315 int (*ndo_set_vf_trust)(struct net_device *dev,
1316 int vf, bool setting);
1317 int (*ndo_get_vf_config)(struct net_device *dev,
1319 struct ifla_vf_info *ivf);
1320 int (*ndo_set_vf_link_state)(struct net_device *dev,
1321 int vf, int link_state);
1322 int (*ndo_get_vf_stats)(struct net_device *dev,
1324 struct ifla_vf_stats
1326 int (*ndo_set_vf_port)(struct net_device *dev,
1328 struct nlattr *port[]);
1329 int (*ndo_get_vf_port)(struct net_device *dev,
1330 int vf, struct sk_buff *skb);
1331 int (*ndo_set_vf_guid)(struct net_device *dev,
1334 int (*ndo_set_vf_rss_query_en)(
1335 struct net_device *dev,
1336 int vf, bool setting);
1337 int (*ndo_setup_tc)(struct net_device *dev,
1338 enum tc_setup_type type,
1340 #if IS_ENABLED(CONFIG_FCOE)
1341 int (*ndo_fcoe_enable)(struct net_device *dev);
1342 int (*ndo_fcoe_disable)(struct net_device *dev);
1343 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1345 struct scatterlist *sgl,
1347 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1349 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1351 struct scatterlist *sgl,
1353 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1354 struct netdev_fcoe_hbainfo *hbainfo);
1357 #if IS_ENABLED(CONFIG_LIBFCOE)
1358 #define NETDEV_FCOE_WWNN 0
1359 #define NETDEV_FCOE_WWPN 1
1360 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1361 u64 *wwn, int type);
1364 #ifdef CONFIG_RFS_ACCEL
1365 int (*ndo_rx_flow_steer)(struct net_device *dev,
1366 const struct sk_buff *skb,
1370 int (*ndo_add_slave)(struct net_device *dev,
1371 struct net_device *slave_dev,
1372 struct netlink_ext_ack *extack);
1373 int (*ndo_del_slave)(struct net_device *dev,
1374 struct net_device *slave_dev);
1375 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1376 netdev_features_t features);
1377 int (*ndo_set_features)(struct net_device *dev,
1378 netdev_features_t features);
1379 int (*ndo_neigh_construct)(struct net_device *dev,
1380 struct neighbour *n);
1381 void (*ndo_neigh_destroy)(struct net_device *dev,
1382 struct neighbour *n);
1384 int (*ndo_fdb_add)(struct ndmsg *ndm,
1385 struct nlattr *tb[],
1386 struct net_device *dev,
1387 const unsigned char *addr,
1390 struct netlink_ext_ack *extack);
1391 int (*ndo_fdb_del)(struct ndmsg *ndm,
1392 struct nlattr *tb[],
1393 struct net_device *dev,
1394 const unsigned char *addr,
1396 int (*ndo_fdb_dump)(struct sk_buff *skb,
1397 struct netlink_callback *cb,
1398 struct net_device *dev,
1399 struct net_device *filter_dev,
1401 int (*ndo_fdb_get)(struct sk_buff *skb,
1402 struct nlattr *tb[],
1403 struct net_device *dev,
1404 const unsigned char *addr,
1405 u16 vid, u32 portid, u32 seq,
1406 struct netlink_ext_ack *extack);
1407 int (*ndo_bridge_setlink)(struct net_device *dev,
1408 struct nlmsghdr *nlh,
1410 struct netlink_ext_ack *extack);
1411 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1413 struct net_device *dev,
1416 int (*ndo_bridge_dellink)(struct net_device *dev,
1417 struct nlmsghdr *nlh,
1419 int (*ndo_change_carrier)(struct net_device *dev,
1421 int (*ndo_get_phys_port_id)(struct net_device *dev,
1422 struct netdev_phys_item_id *ppid);
1423 int (*ndo_get_port_parent_id)(struct net_device *dev,
1424 struct netdev_phys_item_id *ppid);
1425 int (*ndo_get_phys_port_name)(struct net_device *dev,
1426 char *name, size_t len);
1427 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1428 struct udp_tunnel_info *ti);
1429 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1430 struct udp_tunnel_info *ti);
1431 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1432 struct net_device *dev);
1433 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1436 int (*ndo_get_lock_subclass)(struct net_device *dev);
1437 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1440 int (*ndo_get_iflink)(const struct net_device *dev);
1441 int (*ndo_change_proto_down)(struct net_device *dev,
1443 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1444 struct sk_buff *skb);
1445 void (*ndo_set_rx_headroom)(struct net_device *dev,
1446 int needed_headroom);
1447 int (*ndo_bpf)(struct net_device *dev,
1448 struct netdev_bpf *bpf);
1449 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1450 struct xdp_frame **xdp,
1452 int (*ndo_xsk_async_xmit)(struct net_device *dev,
1454 struct devlink * (*ndo_get_devlink)(struct net_device *dev);
1458 * enum net_device_priv_flags - &struct net_device priv_flags
1460 * These are the &struct net_device, they are only set internally
1461 * by drivers and used in the kernel. These flags are invisible to
1462 * userspace; this means that the order of these flags can change
1463 * during any kernel release.
1465 * You should have a pretty good reason to be extending these flags.
1467 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1468 * @IFF_EBRIDGE: Ethernet bridging device
1469 * @IFF_BONDING: bonding master or slave
1470 * @IFF_ISATAP: ISATAP interface (RFC4214)
1471 * @IFF_WAN_HDLC: WAN HDLC device
1472 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1474 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1475 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1476 * @IFF_MACVLAN_PORT: device used as macvlan port
1477 * @IFF_BRIDGE_PORT: device used as bridge port
1478 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1479 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1480 * @IFF_UNICAST_FLT: Supports unicast filtering
1481 * @IFF_TEAM_PORT: device used as team port
1482 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1483 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1484 * change when it's running
1485 * @IFF_MACVLAN: Macvlan device
1486 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1487 * underlying stacked devices
1488 * @IFF_L3MDEV_MASTER: device is an L3 master device
1489 * @IFF_NO_QUEUE: device can run without qdisc attached
1490 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1491 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1492 * @IFF_TEAM: device is a team device
1493 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1494 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1495 * entity (i.e. the master device for bridged veth)
1496 * @IFF_MACSEC: device is a MACsec device
1497 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1498 * @IFF_FAILOVER: device is a failover master device
1499 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1500 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1502 enum netdev_priv_flags {
1503 IFF_802_1Q_VLAN = 1<<0,
1507 IFF_WAN_HDLC = 1<<4,
1508 IFF_XMIT_DST_RELEASE = 1<<5,
1509 IFF_DONT_BRIDGE = 1<<6,
1510 IFF_DISABLE_NETPOLL = 1<<7,
1511 IFF_MACVLAN_PORT = 1<<8,
1512 IFF_BRIDGE_PORT = 1<<9,
1513 IFF_OVS_DATAPATH = 1<<10,
1514 IFF_TX_SKB_SHARING = 1<<11,
1515 IFF_UNICAST_FLT = 1<<12,
1516 IFF_TEAM_PORT = 1<<13,
1517 IFF_SUPP_NOFCS = 1<<14,
1518 IFF_LIVE_ADDR_CHANGE = 1<<15,
1519 IFF_MACVLAN = 1<<16,
1520 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1521 IFF_L3MDEV_MASTER = 1<<18,
1522 IFF_NO_QUEUE = 1<<19,
1523 IFF_OPENVSWITCH = 1<<20,
1524 IFF_L3MDEV_SLAVE = 1<<21,
1526 IFF_RXFH_CONFIGURED = 1<<23,
1527 IFF_PHONY_HEADROOM = 1<<24,
1529 IFF_NO_RX_HANDLER = 1<<26,
1530 IFF_FAILOVER = 1<<27,
1531 IFF_FAILOVER_SLAVE = 1<<28,
1532 IFF_L3MDEV_RX_HANDLER = 1<<29,
1535 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1536 #define IFF_EBRIDGE IFF_EBRIDGE
1537 #define IFF_BONDING IFF_BONDING
1538 #define IFF_ISATAP IFF_ISATAP
1539 #define IFF_WAN_HDLC IFF_WAN_HDLC
1540 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1541 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1542 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1543 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1544 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1545 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1546 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1547 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1548 #define IFF_TEAM_PORT IFF_TEAM_PORT
1549 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1550 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1551 #define IFF_MACVLAN IFF_MACVLAN
1552 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1553 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1554 #define IFF_NO_QUEUE IFF_NO_QUEUE
1555 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1556 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1557 #define IFF_TEAM IFF_TEAM
1558 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1559 #define IFF_MACSEC IFF_MACSEC
1560 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1561 #define IFF_FAILOVER IFF_FAILOVER
1562 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1563 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1566 * struct net_device - The DEVICE structure.
1568 * Actually, this whole structure is a big mistake. It mixes I/O
1569 * data with strictly "high-level" data, and it has to know about
1570 * almost every data structure used in the INET module.
1572 * @name: This is the first field of the "visible" part of this structure
1573 * (i.e. as seen by users in the "Space.c" file). It is the name
1576 * @name_hlist: Device name hash chain, please keep it close to name[]
1577 * @ifalias: SNMP alias
1578 * @mem_end: Shared memory end
1579 * @mem_start: Shared memory start
1580 * @base_addr: Device I/O address
1581 * @irq: Device IRQ number
1583 * @state: Generic network queuing layer state, see netdev_state_t
1584 * @dev_list: The global list of network devices
1585 * @napi_list: List entry used for polling NAPI devices
1586 * @unreg_list: List entry when we are unregistering the
1587 * device; see the function unregister_netdev
1588 * @close_list: List entry used when we are closing the device
1589 * @ptype_all: Device-specific packet handlers for all protocols
1590 * @ptype_specific: Device-specific, protocol-specific packet handlers
1592 * @adj_list: Directly linked devices, like slaves for bonding
1593 * @features: Currently active device features
1594 * @hw_features: User-changeable features
1596 * @wanted_features: User-requested features
1597 * @vlan_features: Mask of features inheritable by VLAN devices
1599 * @hw_enc_features: Mask of features inherited by encapsulating devices
1600 * This field indicates what encapsulation
1601 * offloads the hardware is capable of doing,
1602 * and drivers will need to set them appropriately.
1604 * @mpls_features: Mask of features inheritable by MPLS
1606 * @ifindex: interface index
1607 * @group: The group the device belongs to
1609 * @stats: Statistics struct, which was left as a legacy, use
1610 * rtnl_link_stats64 instead
1612 * @rx_dropped: Dropped packets by core network,
1613 * do not use this in drivers
1614 * @tx_dropped: Dropped packets by core network,
1615 * do not use this in drivers
1616 * @rx_nohandler: nohandler dropped packets by core network on
1617 * inactive devices, do not use this in drivers
1618 * @carrier_up_count: Number of times the carrier has been up
1619 * @carrier_down_count: Number of times the carrier has been down
1621 * @wireless_handlers: List of functions to handle Wireless Extensions,
1623 * see <net/iw_handler.h> for details.
1624 * @wireless_data: Instance data managed by the core of wireless extensions
1626 * @netdev_ops: Includes several pointers to callbacks,
1627 * if one wants to override the ndo_*() functions
1628 * @ethtool_ops: Management operations
1629 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1630 * discovery handling. Necessary for e.g. 6LoWPAN.
1631 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1632 * of Layer 2 headers.
1634 * @flags: Interface flags (a la BSD)
1635 * @priv_flags: Like 'flags' but invisible to userspace,
1636 * see if.h for the definitions
1637 * @gflags: Global flags ( kept as legacy )
1638 * @padded: How much padding added by alloc_netdev()
1639 * @operstate: RFC2863 operstate
1640 * @link_mode: Mapping policy to operstate
1641 * @if_port: Selectable AUI, TP, ...
1643 * @mtu: Interface MTU value
1644 * @min_mtu: Interface Minimum MTU value
1645 * @max_mtu: Interface Maximum MTU value
1646 * @type: Interface hardware type
1647 * @hard_header_len: Maximum hardware header length.
1648 * @min_header_len: Minimum hardware header length
1650 * @needed_headroom: Extra headroom the hardware may need, but not in all
1651 * cases can this be guaranteed
1652 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1653 * cases can this be guaranteed. Some cases also use
1654 * LL_MAX_HEADER instead to allocate the skb
1656 * interface address info:
1658 * @perm_addr: Permanent hw address
1659 * @addr_assign_type: Hw address assignment type
1660 * @addr_len: Hardware address length
1661 * @neigh_priv_len: Used in neigh_alloc()
1662 * @dev_id: Used to differentiate devices that share
1663 * the same link layer address
1664 * @dev_port: Used to differentiate devices that share
1666 * @addr_list_lock: XXX: need comments on this one
1667 * @uc_promisc: Counter that indicates promiscuous mode
1668 * has been enabled due to the need to listen to
1669 * additional unicast addresses in a device that
1670 * does not implement ndo_set_rx_mode()
1671 * @uc: unicast mac addresses
1672 * @mc: multicast mac addresses
1673 * @dev_addrs: list of device hw addresses
1674 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1675 * @promiscuity: Number of times the NIC is told to work in
1676 * promiscuous mode; if it becomes 0 the NIC will
1677 * exit promiscuous mode
1678 * @allmulti: Counter, enables or disables allmulticast mode
1680 * @vlan_info: VLAN info
1681 * @dsa_ptr: dsa specific data
1682 * @tipc_ptr: TIPC specific data
1683 * @atalk_ptr: AppleTalk link
1684 * @ip_ptr: IPv4 specific data
1685 * @dn_ptr: DECnet specific data
1686 * @ip6_ptr: IPv6 specific data
1687 * @ax25_ptr: AX.25 specific data
1688 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1690 * @dev_addr: Hw address (before bcast,
1691 * because most packets are unicast)
1693 * @_rx: Array of RX queues
1694 * @num_rx_queues: Number of RX queues
1695 * allocated at register_netdev() time
1696 * @real_num_rx_queues: Number of RX queues currently active in device
1698 * @rx_handler: handler for received packets
1699 * @rx_handler_data: XXX: need comments on this one
1700 * @miniq_ingress: ingress/clsact qdisc specific data for
1701 * ingress processing
1702 * @ingress_queue: XXX: need comments on this one
1703 * @broadcast: hw bcast address
1705 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1706 * indexed by RX queue number. Assigned by driver.
1707 * This must only be set if the ndo_rx_flow_steer
1708 * operation is defined
1709 * @index_hlist: Device index hash chain
1711 * @_tx: Array of TX queues
1712 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1713 * @real_num_tx_queues: Number of TX queues currently active in device
1714 * @qdisc: Root qdisc from userspace point of view
1715 * @tx_queue_len: Max frames per queue allowed
1716 * @tx_global_lock: XXX: need comments on this one
1718 * @xps_maps: XXX: need comments on this one
1719 * @miniq_egress: clsact qdisc specific data for
1721 * @watchdog_timeo: Represents the timeout that is used by
1722 * the watchdog (see dev_watchdog())
1723 * @watchdog_timer: List of timers
1725 * @pcpu_refcnt: Number of references to this device
1726 * @todo_list: Delayed register/unregister
1727 * @link_watch_list: XXX: need comments on this one
1729 * @reg_state: Register/unregister state machine
1730 * @dismantle: Device is going to be freed
1731 * @rtnl_link_state: This enum represents the phases of creating
1734 * @needs_free_netdev: Should unregister perform free_netdev?
1735 * @priv_destructor: Called from unregister
1736 * @npinfo: XXX: need comments on this one
1737 * @nd_net: Network namespace this network device is inside
1739 * @ml_priv: Mid-layer private
1740 * @lstats: Loopback statistics
1741 * @tstats: Tunnel statistics
1742 * @dstats: Dummy statistics
1743 * @vstats: Virtual ethernet statistics
1748 * @dev: Class/net/name entry
1749 * @sysfs_groups: Space for optional device, statistics and wireless
1752 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1753 * @rtnl_link_ops: Rtnl_link_ops
1755 * @gso_max_size: Maximum size of generic segmentation offload
1756 * @gso_max_segs: Maximum number of segments that can be passed to the
1759 * @dcbnl_ops: Data Center Bridging netlink ops
1760 * @num_tc: Number of traffic classes in the net device
1761 * @tc_to_txq: XXX: need comments on this one
1762 * @prio_tc_map: XXX: need comments on this one
1764 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1766 * @priomap: XXX: need comments on this one
1767 * @phydev: Physical device may attach itself
1768 * for hardware timestamping
1769 * @sfp_bus: attached &struct sfp_bus structure.
1771 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1772 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1774 * @proto_down: protocol port state information can be sent to the
1775 * switch driver and used to set the phys state of the
1778 * @wol_enabled: Wake-on-LAN is enabled
1780 * FIXME: cleanup struct net_device such that network protocol info
1785 char name[IFNAMSIZ];
1786 struct hlist_node name_hlist;
1787 struct dev_ifalias __rcu *ifalias;
1789 * I/O specific fields
1790 * FIXME: Merge these and struct ifmap into one
1792 unsigned long mem_end;
1793 unsigned long mem_start;
1794 unsigned long base_addr;
1798 * Some hardware also needs these fields (state,dev_list,
1799 * napi_list,unreg_list,close_list) but they are not
1800 * part of the usual set specified in Space.c.
1803 unsigned long state;
1805 struct list_head dev_list;
1806 struct list_head napi_list;
1807 struct list_head unreg_list;
1808 struct list_head close_list;
1809 struct list_head ptype_all;
1810 struct list_head ptype_specific;
1813 struct list_head upper;
1814 struct list_head lower;
1817 netdev_features_t features;
1818 netdev_features_t hw_features;
1819 netdev_features_t wanted_features;
1820 netdev_features_t vlan_features;
1821 netdev_features_t hw_enc_features;
1822 netdev_features_t mpls_features;
1823 netdev_features_t gso_partial_features;
1828 struct net_device_stats stats;
1830 atomic_long_t rx_dropped;
1831 atomic_long_t tx_dropped;
1832 atomic_long_t rx_nohandler;
1834 /* Stats to monitor link on/off, flapping */
1835 atomic_t carrier_up_count;
1836 atomic_t carrier_down_count;
1838 #ifdef CONFIG_WIRELESS_EXT
1839 const struct iw_handler_def *wireless_handlers;
1840 struct iw_public_data *wireless_data;
1842 const struct net_device_ops *netdev_ops;
1843 const struct ethtool_ops *ethtool_ops;
1844 #ifdef CONFIG_NET_L3_MASTER_DEV
1845 const struct l3mdev_ops *l3mdev_ops;
1847 #if IS_ENABLED(CONFIG_IPV6)
1848 const struct ndisc_ops *ndisc_ops;
1851 #ifdef CONFIG_XFRM_OFFLOAD
1852 const struct xfrmdev_ops *xfrmdev_ops;
1855 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1856 const struct tlsdev_ops *tlsdev_ops;
1859 const struct header_ops *header_ops;
1862 unsigned int priv_flags;
1864 unsigned short gflags;
1865 unsigned short padded;
1867 unsigned char operstate;
1868 unsigned char link_mode;
1870 unsigned char if_port;
1874 unsigned int min_mtu;
1875 unsigned int max_mtu;
1876 unsigned short type;
1877 unsigned short hard_header_len;
1878 unsigned char min_header_len;
1880 unsigned short needed_headroom;
1881 unsigned short needed_tailroom;
1883 /* Interface address info. */
1884 unsigned char perm_addr[MAX_ADDR_LEN];
1885 unsigned char addr_assign_type;
1886 unsigned char addr_len;
1887 unsigned short neigh_priv_len;
1888 unsigned short dev_id;
1889 unsigned short dev_port;
1890 spinlock_t addr_list_lock;
1891 unsigned char name_assign_type;
1893 struct netdev_hw_addr_list uc;
1894 struct netdev_hw_addr_list mc;
1895 struct netdev_hw_addr_list dev_addrs;
1898 struct kset *queues_kset;
1900 unsigned int promiscuity;
1901 unsigned int allmulti;
1904 /* Protocol-specific pointers */
1906 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1907 struct vlan_info __rcu *vlan_info;
1909 #if IS_ENABLED(CONFIG_NET_DSA)
1910 struct dsa_port *dsa_ptr;
1912 #if IS_ENABLED(CONFIG_TIPC)
1913 struct tipc_bearer __rcu *tipc_ptr;
1915 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1918 struct in_device __rcu *ip_ptr;
1919 #if IS_ENABLED(CONFIG_DECNET)
1920 struct dn_dev __rcu *dn_ptr;
1922 struct inet6_dev __rcu *ip6_ptr;
1923 #if IS_ENABLED(CONFIG_AX25)
1926 struct wireless_dev *ieee80211_ptr;
1927 struct wpan_dev *ieee802154_ptr;
1928 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1929 struct mpls_dev __rcu *mpls_ptr;
1933 * Cache lines mostly used on receive path (including eth_type_trans())
1935 /* Interface address info used in eth_type_trans() */
1936 unsigned char *dev_addr;
1938 struct netdev_rx_queue *_rx;
1939 unsigned int num_rx_queues;
1940 unsigned int real_num_rx_queues;
1942 struct bpf_prog __rcu *xdp_prog;
1943 unsigned long gro_flush_timeout;
1944 rx_handler_func_t __rcu *rx_handler;
1945 void __rcu *rx_handler_data;
1947 #ifdef CONFIG_NET_CLS_ACT
1948 struct mini_Qdisc __rcu *miniq_ingress;
1950 struct netdev_queue __rcu *ingress_queue;
1951 #ifdef CONFIG_NETFILTER_INGRESS
1952 struct nf_hook_entries __rcu *nf_hooks_ingress;
1955 unsigned char broadcast[MAX_ADDR_LEN];
1956 #ifdef CONFIG_RFS_ACCEL
1957 struct cpu_rmap *rx_cpu_rmap;
1959 struct hlist_node index_hlist;
1962 * Cache lines mostly used on transmit path
1964 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1965 unsigned int num_tx_queues;
1966 unsigned int real_num_tx_queues;
1967 struct Qdisc *qdisc;
1968 #ifdef CONFIG_NET_SCHED
1969 DECLARE_HASHTABLE (qdisc_hash, 4);
1971 unsigned int tx_queue_len;
1972 spinlock_t tx_global_lock;
1976 struct xps_dev_maps __rcu *xps_cpus_map;
1977 struct xps_dev_maps __rcu *xps_rxqs_map;
1979 #ifdef CONFIG_NET_CLS_ACT
1980 struct mini_Qdisc __rcu *miniq_egress;
1983 /* These may be needed for future network-power-down code. */
1984 struct timer_list watchdog_timer;
1986 int __percpu *pcpu_refcnt;
1987 struct list_head todo_list;
1989 struct list_head link_watch_list;
1991 enum { NETREG_UNINITIALIZED=0,
1992 NETREG_REGISTERED, /* completed register_netdevice */
1993 NETREG_UNREGISTERING, /* called unregister_netdevice */
1994 NETREG_UNREGISTERED, /* completed unregister todo */
1995 NETREG_RELEASED, /* called free_netdev */
1996 NETREG_DUMMY, /* dummy device for NAPI poll */
2002 RTNL_LINK_INITIALIZED,
2003 RTNL_LINK_INITIALIZING,
2004 } rtnl_link_state:16;
2006 bool needs_free_netdev;
2007 void (*priv_destructor)(struct net_device *dev);
2009 #ifdef CONFIG_NETPOLL
2010 struct netpoll_info __rcu *npinfo;
2013 possible_net_t nd_net;
2015 /* mid-layer private */
2018 struct pcpu_lstats __percpu *lstats;
2019 struct pcpu_sw_netstats __percpu *tstats;
2020 struct pcpu_dstats __percpu *dstats;
2023 #if IS_ENABLED(CONFIG_GARP)
2024 struct garp_port __rcu *garp_port;
2026 #if IS_ENABLED(CONFIG_MRP)
2027 struct mrp_port __rcu *mrp_port;
2031 const struct attribute_group *sysfs_groups[4];
2032 const struct attribute_group *sysfs_rx_queue_group;
2034 const struct rtnl_link_ops *rtnl_link_ops;
2036 /* for setting kernel sock attribute on TCP connection setup */
2037 #define GSO_MAX_SIZE 65536
2038 unsigned int gso_max_size;
2039 #define GSO_MAX_SEGS 65535
2043 const struct dcbnl_rtnl_ops *dcbnl_ops;
2046 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2047 u8 prio_tc_map[TC_BITMASK + 1];
2049 #if IS_ENABLED(CONFIG_FCOE)
2050 unsigned int fcoe_ddp_xid;
2052 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2053 struct netprio_map __rcu *priomap;
2055 struct phy_device *phydev;
2056 struct sfp_bus *sfp_bus;
2057 struct lock_class_key *qdisc_tx_busylock;
2058 struct lock_class_key *qdisc_running_key;
2060 unsigned wol_enabled:1;
2062 #define to_net_dev(d) container_of(d, struct net_device, dev)
2064 static inline bool netif_elide_gro(const struct net_device *dev)
2066 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2071 #define NETDEV_ALIGN 32
2074 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2076 return dev->prio_tc_map[prio & TC_BITMASK];
2080 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2082 if (tc >= dev->num_tc)
2085 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2089 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2090 void netdev_reset_tc(struct net_device *dev);
2091 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2092 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2095 int netdev_get_num_tc(struct net_device *dev)
2100 void netdev_unbind_sb_channel(struct net_device *dev,
2101 struct net_device *sb_dev);
2102 int netdev_bind_sb_channel_queue(struct net_device *dev,
2103 struct net_device *sb_dev,
2104 u8 tc, u16 count, u16 offset);
2105 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2106 static inline int netdev_get_sb_channel(struct net_device *dev)
2108 return max_t(int, -dev->num_tc, 0);
2112 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2115 return &dev->_tx[index];
2118 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2119 const struct sk_buff *skb)
2121 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2124 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2125 void (*f)(struct net_device *,
2126 struct netdev_queue *,
2132 for (i = 0; i < dev->num_tx_queues; i++)
2133 f(dev, &dev->_tx[i], arg);
2136 #define netdev_lockdep_set_classes(dev) \
2138 static struct lock_class_key qdisc_tx_busylock_key; \
2139 static struct lock_class_key qdisc_running_key; \
2140 static struct lock_class_key qdisc_xmit_lock_key; \
2141 static struct lock_class_key dev_addr_list_lock_key; \
2144 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2145 (dev)->qdisc_running_key = &qdisc_running_key; \
2146 lockdep_set_class(&(dev)->addr_list_lock, \
2147 &dev_addr_list_lock_key); \
2148 for (i = 0; i < (dev)->num_tx_queues; i++) \
2149 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2150 &qdisc_xmit_lock_key); \
2153 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2154 struct net_device *sb_dev);
2155 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2156 struct sk_buff *skb,
2157 struct net_device *sb_dev);
2159 /* returns the headroom that the master device needs to take in account
2160 * when forwarding to this dev
2162 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2164 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2167 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2169 if (dev->netdev_ops->ndo_set_rx_headroom)
2170 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2173 /* set the device rx headroom to the dev's default */
2174 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2176 netdev_set_rx_headroom(dev, -1);
2180 * Net namespace inlines
2183 struct net *dev_net(const struct net_device *dev)
2185 return read_pnet(&dev->nd_net);
2189 void dev_net_set(struct net_device *dev, struct net *net)
2191 write_pnet(&dev->nd_net, net);
2195 * netdev_priv - access network device private data
2196 * @dev: network device
2198 * Get network device private data
2200 static inline void *netdev_priv(const struct net_device *dev)
2202 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2205 /* Set the sysfs physical device reference for the network logical device
2206 * if set prior to registration will cause a symlink during initialization.
2208 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2210 /* Set the sysfs device type for the network logical device to allow
2211 * fine-grained identification of different network device types. For
2212 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2214 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2216 /* Default NAPI poll() weight
2217 * Device drivers are strongly advised to not use bigger value
2219 #define NAPI_POLL_WEIGHT 64
2222 * netif_napi_add - initialize a NAPI context
2223 * @dev: network device
2224 * @napi: NAPI context
2225 * @poll: polling function
2226 * @weight: default weight
2228 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2229 * *any* of the other NAPI-related functions.
2231 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2232 int (*poll)(struct napi_struct *, int), int weight);
2235 * netif_tx_napi_add - initialize a NAPI context
2236 * @dev: network device
2237 * @napi: NAPI context
2238 * @poll: polling function
2239 * @weight: default weight
2241 * This variant of netif_napi_add() should be used from drivers using NAPI
2242 * to exclusively poll a TX queue.
2243 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2245 static inline void netif_tx_napi_add(struct net_device *dev,
2246 struct napi_struct *napi,
2247 int (*poll)(struct napi_struct *, int),
2250 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2251 netif_napi_add(dev, napi, poll, weight);
2255 * netif_napi_del - remove a NAPI context
2256 * @napi: NAPI context
2258 * netif_napi_del() removes a NAPI context from the network device NAPI list
2260 void netif_napi_del(struct napi_struct *napi);
2262 struct napi_gro_cb {
2263 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2266 /* Length of frag0. */
2267 unsigned int frag0_len;
2269 /* This indicates where we are processing relative to skb->data. */
2272 /* This is non-zero if the packet cannot be merged with the new skb. */
2275 /* Save the IP ID here and check when we get to the transport layer */
2278 /* Number of segments aggregated. */
2281 /* Start offset for remote checksum offload */
2282 u16 gro_remcsum_start;
2284 /* jiffies when first packet was created/queued */
2287 /* Used in ipv6_gro_receive() and foo-over-udp */
2290 /* This is non-zero if the packet may be of the same flow. */
2293 /* Used in tunnel GRO receive */
2296 /* GRO checksum is valid */
2299 /* Number of checksums via CHECKSUM_UNNECESSARY */
2304 #define NAPI_GRO_FREE 1
2305 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2307 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2310 /* Used in GRE, set in fou/gue_gro_receive */
2313 /* Used to determine if flush_id can be ignored */
2316 /* Number of gro_receive callbacks this packet already went through */
2317 u8 recursion_counter:4;
2321 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2324 /* used in skb_gro_receive() slow path */
2325 struct sk_buff *last;
2328 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2330 #define GRO_RECURSION_LIMIT 15
2331 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2333 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2336 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2337 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2338 struct list_head *head,
2339 struct sk_buff *skb)
2341 if (unlikely(gro_recursion_inc_test(skb))) {
2342 NAPI_GRO_CB(skb)->flush |= 1;
2346 return cb(head, skb);
2349 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2351 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2353 struct list_head *head,
2354 struct sk_buff *skb)
2356 if (unlikely(gro_recursion_inc_test(skb))) {
2357 NAPI_GRO_CB(skb)->flush |= 1;
2361 return cb(sk, head, skb);
2364 struct packet_type {
2365 __be16 type; /* This is really htons(ether_type). */
2366 bool ignore_outgoing;
2367 struct net_device *dev; /* NULL is wildcarded here */
2368 int (*func) (struct sk_buff *,
2369 struct net_device *,
2370 struct packet_type *,
2371 struct net_device *);
2372 void (*list_func) (struct list_head *,
2373 struct packet_type *,
2374 struct net_device *);
2375 bool (*id_match)(struct packet_type *ptype,
2377 void *af_packet_priv;
2378 struct list_head list;
2381 struct offload_callbacks {
2382 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2383 netdev_features_t features);
2384 struct sk_buff *(*gro_receive)(struct list_head *head,
2385 struct sk_buff *skb);
2386 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2389 struct packet_offload {
2390 __be16 type; /* This is really htons(ether_type). */
2392 struct offload_callbacks callbacks;
2393 struct list_head list;
2396 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2397 struct pcpu_sw_netstats {
2402 struct u64_stats_sync syncp;
2403 } __aligned(4 * sizeof(u64));
2405 struct pcpu_lstats {
2408 struct u64_stats_sync syncp;
2409 } __aligned(2 * sizeof(u64));
2411 #define __netdev_alloc_pcpu_stats(type, gfp) \
2413 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2416 for_each_possible_cpu(__cpu) { \
2417 typeof(type) *stat; \
2418 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2419 u64_stats_init(&stat->syncp); \
2425 #define netdev_alloc_pcpu_stats(type) \
2426 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2428 enum netdev_lag_tx_type {
2429 NETDEV_LAG_TX_TYPE_UNKNOWN,
2430 NETDEV_LAG_TX_TYPE_RANDOM,
2431 NETDEV_LAG_TX_TYPE_BROADCAST,
2432 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2433 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2434 NETDEV_LAG_TX_TYPE_HASH,
2437 enum netdev_lag_hash {
2438 NETDEV_LAG_HASH_NONE,
2440 NETDEV_LAG_HASH_L34,
2441 NETDEV_LAG_HASH_L23,
2442 NETDEV_LAG_HASH_E23,
2443 NETDEV_LAG_HASH_E34,
2444 NETDEV_LAG_HASH_UNKNOWN,
2447 struct netdev_lag_upper_info {
2448 enum netdev_lag_tx_type tx_type;
2449 enum netdev_lag_hash hash_type;
2452 struct netdev_lag_lower_state_info {
2457 #include <linux/notifier.h>
2459 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2460 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2464 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2466 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2467 detected a hardware crash and restarted
2468 - we can use this eg to kick tcp sessions
2470 NETDEV_CHANGE, /* Notify device state change */
2473 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2474 NETDEV_CHANGEADDR, /* notify after the address change */
2475 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2479 NETDEV_BONDING_FAILOVER,
2481 NETDEV_PRE_TYPE_CHANGE,
2482 NETDEV_POST_TYPE_CHANGE,
2485 NETDEV_NOTIFY_PEERS,
2489 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2490 NETDEV_CHANGEINFODATA,
2491 NETDEV_BONDING_INFO,
2492 NETDEV_PRECHANGEUPPER,
2493 NETDEV_CHANGELOWERSTATE,
2494 NETDEV_UDP_TUNNEL_PUSH_INFO,
2495 NETDEV_UDP_TUNNEL_DROP_INFO,
2496 NETDEV_CHANGE_TX_QUEUE_LEN,
2497 NETDEV_CVLAN_FILTER_PUSH_INFO,
2498 NETDEV_CVLAN_FILTER_DROP_INFO,
2499 NETDEV_SVLAN_FILTER_PUSH_INFO,
2500 NETDEV_SVLAN_FILTER_DROP_INFO,
2502 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2504 int register_netdevice_notifier(struct notifier_block *nb);
2505 int unregister_netdevice_notifier(struct notifier_block *nb);
2507 struct netdev_notifier_info {
2508 struct net_device *dev;
2509 struct netlink_ext_ack *extack;
2512 struct netdev_notifier_info_ext {
2513 struct netdev_notifier_info info; /* must be first */
2519 struct netdev_notifier_change_info {
2520 struct netdev_notifier_info info; /* must be first */
2521 unsigned int flags_changed;
2524 struct netdev_notifier_changeupper_info {
2525 struct netdev_notifier_info info; /* must be first */
2526 struct net_device *upper_dev; /* new upper dev */
2527 bool master; /* is upper dev master */
2528 bool linking; /* is the notification for link or unlink */
2529 void *upper_info; /* upper dev info */
2532 struct netdev_notifier_changelowerstate_info {
2533 struct netdev_notifier_info info; /* must be first */
2534 void *lower_state_info; /* is lower dev state */
2537 struct netdev_notifier_pre_changeaddr_info {
2538 struct netdev_notifier_info info; /* must be first */
2539 const unsigned char *dev_addr;
2542 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2543 struct net_device *dev)
2546 info->extack = NULL;
2549 static inline struct net_device *
2550 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2555 static inline struct netlink_ext_ack *
2556 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2558 return info->extack;
2561 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2564 extern rwlock_t dev_base_lock; /* Device list lock */
2566 #define for_each_netdev(net, d) \
2567 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2568 #define for_each_netdev_reverse(net, d) \
2569 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2570 #define for_each_netdev_rcu(net, d) \
2571 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2572 #define for_each_netdev_safe(net, d, n) \
2573 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2574 #define for_each_netdev_continue(net, d) \
2575 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2576 #define for_each_netdev_continue_rcu(net, d) \
2577 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2578 #define for_each_netdev_in_bond_rcu(bond, slave) \
2579 for_each_netdev_rcu(&init_net, slave) \
2580 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2581 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2583 static inline struct net_device *next_net_device(struct net_device *dev)
2585 struct list_head *lh;
2589 lh = dev->dev_list.next;
2590 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2593 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2595 struct list_head *lh;
2599 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2600 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2603 static inline struct net_device *first_net_device(struct net *net)
2605 return list_empty(&net->dev_base_head) ? NULL :
2606 net_device_entry(net->dev_base_head.next);
2609 static inline struct net_device *first_net_device_rcu(struct net *net)
2611 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2613 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2616 int netdev_boot_setup_check(struct net_device *dev);
2617 unsigned long netdev_boot_base(const char *prefix, int unit);
2618 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2619 const char *hwaddr);
2620 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2621 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2622 void dev_add_pack(struct packet_type *pt);
2623 void dev_remove_pack(struct packet_type *pt);
2624 void __dev_remove_pack(struct packet_type *pt);
2625 void dev_add_offload(struct packet_offload *po);
2626 void dev_remove_offload(struct packet_offload *po);
2628 int dev_get_iflink(const struct net_device *dev);
2629 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2630 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2631 unsigned short mask);
2632 struct net_device *dev_get_by_name(struct net *net, const char *name);
2633 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2634 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2635 int dev_alloc_name(struct net_device *dev, const char *name);
2636 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2637 void dev_close(struct net_device *dev);
2638 void dev_close_many(struct list_head *head, bool unlink);
2639 void dev_disable_lro(struct net_device *dev);
2640 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2641 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2642 struct net_device *sb_dev);
2643 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2644 struct net_device *sb_dev);
2645 int dev_queue_xmit(struct sk_buff *skb);
2646 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2647 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2648 int register_netdevice(struct net_device *dev);
2649 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2650 void unregister_netdevice_many(struct list_head *head);
2651 static inline void unregister_netdevice(struct net_device *dev)
2653 unregister_netdevice_queue(dev, NULL);
2656 int netdev_refcnt_read(const struct net_device *dev);
2657 void free_netdev(struct net_device *dev);
2658 void netdev_freemem(struct net_device *dev);
2659 void synchronize_net(void);
2660 int init_dummy_netdev(struct net_device *dev);
2662 DECLARE_PER_CPU(int, xmit_recursion);
2663 #define XMIT_RECURSION_LIMIT 10
2665 static inline int dev_recursion_level(void)
2667 return this_cpu_read(xmit_recursion);
2670 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2671 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2672 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2673 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2674 int netdev_get_name(struct net *net, char *name, int ifindex);
2675 int dev_restart(struct net_device *dev);
2676 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2678 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2680 return NAPI_GRO_CB(skb)->data_offset;
2683 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2685 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2688 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2690 NAPI_GRO_CB(skb)->data_offset += len;
2693 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2694 unsigned int offset)
2696 return NAPI_GRO_CB(skb)->frag0 + offset;
2699 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2701 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2704 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2706 NAPI_GRO_CB(skb)->frag0 = NULL;
2707 NAPI_GRO_CB(skb)->frag0_len = 0;
2710 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2711 unsigned int offset)
2713 if (!pskb_may_pull(skb, hlen))
2716 skb_gro_frag0_invalidate(skb);
2717 return skb->data + offset;
2720 static inline void *skb_gro_network_header(struct sk_buff *skb)
2722 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2723 skb_network_offset(skb);
2726 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2727 const void *start, unsigned int len)
2729 if (NAPI_GRO_CB(skb)->csum_valid)
2730 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2731 csum_partial(start, len, 0));
2734 /* GRO checksum functions. These are logical equivalents of the normal
2735 * checksum functions (in skbuff.h) except that they operate on the GRO
2736 * offsets and fields in sk_buff.
2739 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2741 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2743 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2746 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2750 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2751 skb_checksum_start_offset(skb) <
2752 skb_gro_offset(skb)) &&
2753 !skb_at_gro_remcsum_start(skb) &&
2754 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2755 (!zero_okay || check));
2758 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2761 if (NAPI_GRO_CB(skb)->csum_valid &&
2762 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2765 NAPI_GRO_CB(skb)->csum = psum;
2767 return __skb_gro_checksum_complete(skb);
2770 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2772 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2773 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2774 NAPI_GRO_CB(skb)->csum_cnt--;
2776 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2777 * verified a new top level checksum or an encapsulated one
2778 * during GRO. This saves work if we fallback to normal path.
2780 __skb_incr_checksum_unnecessary(skb);
2784 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2787 __sum16 __ret = 0; \
2788 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2789 __ret = __skb_gro_checksum_validate_complete(skb, \
2790 compute_pseudo(skb, proto)); \
2792 skb_gro_incr_csum_unnecessary(skb); \
2796 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2797 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2799 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2801 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2803 #define skb_gro_checksum_simple_validate(skb) \
2804 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2806 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2808 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2809 !NAPI_GRO_CB(skb)->csum_valid);
2812 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2813 __sum16 check, __wsum pseudo)
2815 NAPI_GRO_CB(skb)->csum = ~pseudo;
2816 NAPI_GRO_CB(skb)->csum_valid = 1;
2819 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2821 if (__skb_gro_checksum_convert_check(skb)) \
2822 __skb_gro_checksum_convert(skb, check, \
2823 compute_pseudo(skb, proto)); \
2826 struct gro_remcsum {
2831 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2837 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2838 unsigned int off, size_t hdrlen,
2839 int start, int offset,
2840 struct gro_remcsum *grc,
2844 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2846 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2849 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2853 ptr = skb_gro_header_fast(skb, off);
2854 if (skb_gro_header_hard(skb, off + plen)) {
2855 ptr = skb_gro_header_slow(skb, off + plen, off);
2860 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2863 /* Adjust skb->csum since we changed the packet */
2864 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2866 grc->offset = off + hdrlen + offset;
2872 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2873 struct gro_remcsum *grc)
2876 size_t plen = grc->offset + sizeof(u16);
2881 ptr = skb_gro_header_fast(skb, grc->offset);
2882 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2883 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2888 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2891 #ifdef CONFIG_XFRM_OFFLOAD
2892 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2894 if (PTR_ERR(pp) != -EINPROGRESS)
2895 NAPI_GRO_CB(skb)->flush |= flush;
2897 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2900 struct gro_remcsum *grc)
2902 if (PTR_ERR(pp) != -EINPROGRESS) {
2903 NAPI_GRO_CB(skb)->flush |= flush;
2904 skb_gro_remcsum_cleanup(skb, grc);
2905 skb->remcsum_offload = 0;
2909 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2911 NAPI_GRO_CB(skb)->flush |= flush;
2913 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2916 struct gro_remcsum *grc)
2918 NAPI_GRO_CB(skb)->flush |= flush;
2919 skb_gro_remcsum_cleanup(skb, grc);
2920 skb->remcsum_offload = 0;
2924 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2925 unsigned short type,
2926 const void *daddr, const void *saddr,
2929 if (!dev->header_ops || !dev->header_ops->create)
2932 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2935 static inline int dev_parse_header(const struct sk_buff *skb,
2936 unsigned char *haddr)
2938 const struct net_device *dev = skb->dev;
2940 if (!dev->header_ops || !dev->header_ops->parse)
2942 return dev->header_ops->parse(skb, haddr);
2945 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2947 const struct net_device *dev = skb->dev;
2949 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2951 return dev->header_ops->parse_protocol(skb);
2954 /* ll_header must have at least hard_header_len allocated */
2955 static inline bool dev_validate_header(const struct net_device *dev,
2956 char *ll_header, int len)
2958 if (likely(len >= dev->hard_header_len))
2960 if (len < dev->min_header_len)
2963 if (capable(CAP_SYS_RAWIO)) {
2964 memset(ll_header + len, 0, dev->hard_header_len - len);
2968 if (dev->header_ops && dev->header_ops->validate)
2969 return dev->header_ops->validate(ll_header, len);
2974 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2976 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2977 static inline int unregister_gifconf(unsigned int family)
2979 return register_gifconf(family, NULL);
2982 #ifdef CONFIG_NET_FLOW_LIMIT
2983 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2984 struct sd_flow_limit {
2986 unsigned int num_buckets;
2987 unsigned int history_head;
2988 u16 history[FLOW_LIMIT_HISTORY];
2992 extern int netdev_flow_limit_table_len;
2993 #endif /* CONFIG_NET_FLOW_LIMIT */
2996 * Incoming packets are placed on per-CPU queues
2998 struct softnet_data {
2999 struct list_head poll_list;
3000 struct sk_buff_head process_queue;
3003 unsigned int processed;
3004 unsigned int time_squeeze;
3005 unsigned int received_rps;
3007 struct softnet_data *rps_ipi_list;
3009 #ifdef CONFIG_NET_FLOW_LIMIT
3010 struct sd_flow_limit __rcu *flow_limit;
3012 struct Qdisc *output_queue;
3013 struct Qdisc **output_queue_tailp;
3014 struct sk_buff *completion_queue;
3015 #ifdef CONFIG_XFRM_OFFLOAD
3016 struct sk_buff_head xfrm_backlog;
3019 /* input_queue_head should be written by cpu owning this struct,
3020 * and only read by other cpus. Worth using a cache line.
3022 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3024 /* Elements below can be accessed between CPUs for RPS/RFS */
3025 call_single_data_t csd ____cacheline_aligned_in_smp;
3026 struct softnet_data *rps_ipi_next;
3028 unsigned int input_queue_tail;
3030 unsigned int dropped;
3031 struct sk_buff_head input_pkt_queue;
3032 struct napi_struct backlog;
3036 static inline void input_queue_head_incr(struct softnet_data *sd)
3039 sd->input_queue_head++;
3043 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3044 unsigned int *qtail)
3047 *qtail = ++sd->input_queue_tail;
3051 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3053 void __netif_schedule(struct Qdisc *q);
3054 void netif_schedule_queue(struct netdev_queue *txq);
3056 static inline void netif_tx_schedule_all(struct net_device *dev)
3060 for (i = 0; i < dev->num_tx_queues; i++)
3061 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3064 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3066 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3070 * netif_start_queue - allow transmit
3071 * @dev: network device
3073 * Allow upper layers to call the device hard_start_xmit routine.
3075 static inline void netif_start_queue(struct net_device *dev)
3077 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3080 static inline void netif_tx_start_all_queues(struct net_device *dev)
3084 for (i = 0; i < dev->num_tx_queues; i++) {
3085 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3086 netif_tx_start_queue(txq);
3090 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3093 * netif_wake_queue - restart transmit
3094 * @dev: network device
3096 * Allow upper layers to call the device hard_start_xmit routine.
3097 * Used for flow control when transmit resources are available.
3099 static inline void netif_wake_queue(struct net_device *dev)
3101 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3104 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3108 for (i = 0; i < dev->num_tx_queues; i++) {
3109 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3110 netif_tx_wake_queue(txq);
3114 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3116 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3120 * netif_stop_queue - stop transmitted packets
3121 * @dev: network device
3123 * Stop upper layers calling the device hard_start_xmit routine.
3124 * Used for flow control when transmit resources are unavailable.
3126 static inline void netif_stop_queue(struct net_device *dev)
3128 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3131 void netif_tx_stop_all_queues(struct net_device *dev);
3133 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3135 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3139 * netif_queue_stopped - test if transmit queue is flowblocked
3140 * @dev: network device
3142 * Test if transmit queue on device is currently unable to send.
3144 static inline bool netif_queue_stopped(const struct net_device *dev)
3146 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3149 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3151 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3155 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3157 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3161 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3163 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3167 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3168 * @dev_queue: pointer to transmit queue
3170 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3171 * to give appropriate hint to the CPU.
3173 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3176 prefetchw(&dev_queue->dql.num_queued);
3181 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3182 * @dev_queue: pointer to transmit queue
3184 * BQL enabled drivers might use this helper in their TX completion path,
3185 * to give appropriate hint to the CPU.
3187 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3190 prefetchw(&dev_queue->dql.limit);
3194 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3198 dql_queued(&dev_queue->dql, bytes);
3200 if (likely(dql_avail(&dev_queue->dql) >= 0))
3203 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3206 * The XOFF flag must be set before checking the dql_avail below,
3207 * because in netdev_tx_completed_queue we update the dql_completed
3208 * before checking the XOFF flag.
3212 /* check again in case another CPU has just made room avail */
3213 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3214 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3218 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3219 * that they should not test BQL status themselves.
3220 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3222 * Returns true if the doorbell must be used to kick the NIC.
3224 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3230 dql_queued(&dev_queue->dql, bytes);
3232 return netif_tx_queue_stopped(dev_queue);
3234 netdev_tx_sent_queue(dev_queue, bytes);
3239 * netdev_sent_queue - report the number of bytes queued to hardware
3240 * @dev: network device
3241 * @bytes: number of bytes queued to the hardware device queue
3243 * Report the number of bytes queued for sending/completion to the network
3244 * device hardware queue. @bytes should be a good approximation and should
3245 * exactly match netdev_completed_queue() @bytes
3247 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3249 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3252 static inline bool __netdev_sent_queue(struct net_device *dev,
3256 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3260 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3261 unsigned int pkts, unsigned int bytes)
3264 if (unlikely(!bytes))
3267 dql_completed(&dev_queue->dql, bytes);
3270 * Without the memory barrier there is a small possiblity that
3271 * netdev_tx_sent_queue will miss the update and cause the queue to
3272 * be stopped forever
3276 if (dql_avail(&dev_queue->dql) < 0)
3279 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3280 netif_schedule_queue(dev_queue);
3285 * netdev_completed_queue - report bytes and packets completed by device
3286 * @dev: network device
3287 * @pkts: actual number of packets sent over the medium
3288 * @bytes: actual number of bytes sent over the medium
3290 * Report the number of bytes and packets transmitted by the network device
3291 * hardware queue over the physical medium, @bytes must exactly match the
3292 * @bytes amount passed to netdev_sent_queue()
3294 static inline void netdev_completed_queue(struct net_device *dev,
3295 unsigned int pkts, unsigned int bytes)
3297 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3300 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3303 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3309 * netdev_reset_queue - reset the packets and bytes count of a network device
3310 * @dev_queue: network device
3312 * Reset the bytes and packet count of a network device and clear the
3313 * software flow control OFF bit for this network device
3315 static inline void netdev_reset_queue(struct net_device *dev_queue)
3317 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3321 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3322 * @dev: network device
3323 * @queue_index: given tx queue index
3325 * Returns 0 if given tx queue index >= number of device tx queues,
3326 * otherwise returns the originally passed tx queue index.
3328 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3330 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3331 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3332 dev->name, queue_index,
3333 dev->real_num_tx_queues);
3341 * netif_running - test if up
3342 * @dev: network device
3344 * Test if the device has been brought up.
3346 static inline bool netif_running(const struct net_device *dev)
3348 return test_bit(__LINK_STATE_START, &dev->state);
3352 * Routines to manage the subqueues on a device. We only need start,
3353 * stop, and a check if it's stopped. All other device management is
3354 * done at the overall netdevice level.
3355 * Also test the device if we're multiqueue.
3359 * netif_start_subqueue - allow sending packets on subqueue
3360 * @dev: network device
3361 * @queue_index: sub queue index
3363 * Start individual transmit queue of a device with multiple transmit queues.
3365 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3367 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3369 netif_tx_start_queue(txq);
3373 * netif_stop_subqueue - stop sending packets on subqueue
3374 * @dev: network device
3375 * @queue_index: sub queue index
3377 * Stop individual transmit queue of a device with multiple transmit queues.
3379 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3381 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3382 netif_tx_stop_queue(txq);
3386 * netif_subqueue_stopped - test status of subqueue
3387 * @dev: network device
3388 * @queue_index: sub queue index
3390 * Check individual transmit queue of a device with multiple transmit queues.
3392 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3395 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3397 return netif_tx_queue_stopped(txq);
3400 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3401 struct sk_buff *skb)
3403 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3407 * netif_wake_subqueue - allow sending packets on subqueue
3408 * @dev: network device
3409 * @queue_index: sub queue index
3411 * Resume individual transmit queue of a device with multiple transmit queues.
3413 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3415 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3417 netif_tx_wake_queue(txq);
3421 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3423 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3424 u16 index, bool is_rxqs_map);
3427 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3428 * @j: CPU/Rx queue index
3429 * @mask: bitmask of all cpus/rx queues
3430 * @nr_bits: number of bits in the bitmask
3432 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3434 static inline bool netif_attr_test_mask(unsigned long j,
3435 const unsigned long *mask,
3436 unsigned int nr_bits)
3438 cpu_max_bits_warn(j, nr_bits);
3439 return test_bit(j, mask);
3443 * netif_attr_test_online - Test for online CPU/Rx queue
3444 * @j: CPU/Rx queue index
3445 * @online_mask: bitmask for CPUs/Rx queues that are online
3446 * @nr_bits: number of bits in the bitmask
3448 * Returns true if a CPU/Rx queue is online.
3450 static inline bool netif_attr_test_online(unsigned long j,
3451 const unsigned long *online_mask,
3452 unsigned int nr_bits)
3454 cpu_max_bits_warn(j, nr_bits);
3457 return test_bit(j, online_mask);
3459 return (j < nr_bits);
3463 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3464 * @n: CPU/Rx queue index
3465 * @srcp: the cpumask/Rx queue mask pointer
3466 * @nr_bits: number of bits in the bitmask
3468 * Returns >= nr_bits if no further CPUs/Rx queues set.
3470 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3471 unsigned int nr_bits)
3473 /* -1 is a legal arg here. */
3475 cpu_max_bits_warn(n, nr_bits);
3478 return find_next_bit(srcp, nr_bits, n + 1);
3484 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3485 * @n: CPU/Rx queue index
3486 * @src1p: the first CPUs/Rx queues mask pointer
3487 * @src2p: the second CPUs/Rx queues mask pointer
3488 * @nr_bits: number of bits in the bitmask
3490 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3492 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3493 const unsigned long *src2p,
3494 unsigned int nr_bits)
3496 /* -1 is a legal arg here. */
3498 cpu_max_bits_warn(n, nr_bits);
3501 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3503 return find_next_bit(src1p, nr_bits, n + 1);
3505 return find_next_bit(src2p, nr_bits, n + 1);
3510 static inline int netif_set_xps_queue(struct net_device *dev,
3511 const struct cpumask *mask,
3517 static inline int __netif_set_xps_queue(struct net_device *dev,
3518 const unsigned long *mask,
3519 u16 index, bool is_rxqs_map)
3526 * netif_is_multiqueue - test if device has multiple transmit queues
3527 * @dev: network device
3529 * Check if device has multiple transmit queues
3531 static inline bool netif_is_multiqueue(const struct net_device *dev)
3533 return dev->num_tx_queues > 1;
3536 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3539 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3541 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3544 dev->real_num_rx_queues = rxqs;
3549 static inline struct netdev_rx_queue *
3550 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3552 return dev->_rx + rxq;
3556 static inline unsigned int get_netdev_rx_queue_index(
3557 struct netdev_rx_queue *queue)
3559 struct net_device *dev = queue->dev;
3560 int index = queue - dev->_rx;
3562 BUG_ON(index >= dev->num_rx_queues);
3567 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3568 int netif_get_num_default_rss_queues(void);
3570 enum skb_free_reason {
3571 SKB_REASON_CONSUMED,
3575 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3576 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3579 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3580 * interrupt context or with hardware interrupts being disabled.
3581 * (in_irq() || irqs_disabled())
3583 * We provide four helpers that can be used in following contexts :
3585 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3586 * replacing kfree_skb(skb)
3588 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3589 * Typically used in place of consume_skb(skb) in TX completion path
3591 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3592 * replacing kfree_skb(skb)
3594 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3595 * and consumed a packet. Used in place of consume_skb(skb)
3597 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3599 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3602 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3604 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3607 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3609 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3612 static inline void dev_consume_skb_any(struct sk_buff *skb)
3614 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3617 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3618 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3619 int netif_rx(struct sk_buff *skb);
3620 int netif_rx_ni(struct sk_buff *skb);
3621 int netif_receive_skb(struct sk_buff *skb);
3622 int netif_receive_skb_core(struct sk_buff *skb);
3623 void netif_receive_skb_list(struct list_head *head);
3624 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3625 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3626 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3627 gro_result_t napi_gro_frags(struct napi_struct *napi);
3628 struct packet_offload *gro_find_receive_by_type(__be16 type);
3629 struct packet_offload *gro_find_complete_by_type(__be16 type);
3631 static inline void napi_free_frags(struct napi_struct *napi)
3633 kfree_skb(napi->skb);
3637 bool netdev_is_rx_handler_busy(struct net_device *dev);
3638 int netdev_rx_handler_register(struct net_device *dev,
3639 rx_handler_func_t *rx_handler,
3640 void *rx_handler_data);
3641 void netdev_rx_handler_unregister(struct net_device *dev);
3643 bool dev_valid_name(const char *name);
3644 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3645 bool *need_copyout);
3646 int dev_ifconf(struct net *net, struct ifconf *, int);
3647 int dev_ethtool(struct net *net, struct ifreq *);
3648 unsigned int dev_get_flags(const struct net_device *);
3649 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3650 struct netlink_ext_ack *extack);
3651 int dev_change_flags(struct net_device *dev, unsigned int flags,
3652 struct netlink_ext_ack *extack);
3653 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3654 unsigned int gchanges);
3655 int dev_change_name(struct net_device *, const char *);
3656 int dev_set_alias(struct net_device *, const char *, size_t);
3657 int dev_get_alias(const struct net_device *, char *, size_t);
3658 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3659 int __dev_set_mtu(struct net_device *, int);
3660 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3661 struct netlink_ext_ack *extack);
3662 int dev_set_mtu(struct net_device *, int);
3663 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3664 void dev_set_group(struct net_device *, int);
3665 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3666 struct netlink_ext_ack *extack);
3667 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3668 struct netlink_ext_ack *extack);
3669 int dev_change_carrier(struct net_device *, bool new_carrier);
3670 int dev_get_phys_port_id(struct net_device *dev,
3671 struct netdev_phys_item_id *ppid);
3672 int dev_get_phys_port_name(struct net_device *dev,
3673 char *name, size_t len);
3674 int dev_get_port_parent_id(struct net_device *dev,
3675 struct netdev_phys_item_id *ppid, bool recurse);
3676 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3677 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3678 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3679 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3680 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3681 struct netdev_queue *txq, int *ret);
3683 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3684 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3686 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3687 enum bpf_netdev_command cmd);
3688 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3690 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3691 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3692 bool is_skb_forwardable(const struct net_device *dev,
3693 const struct sk_buff *skb);
3695 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3696 struct sk_buff *skb)
3698 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3699 unlikely(!is_skb_forwardable(dev, skb))) {
3700 atomic_long_inc(&dev->rx_dropped);
3705 skb_scrub_packet(skb, true);
3710 bool dev_nit_active(struct net_device *dev);
3711 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3713 extern int netdev_budget;
3714 extern unsigned int netdev_budget_usecs;
3716 /* Called by rtnetlink.c:rtnl_unlock() */
3717 void netdev_run_todo(void);
3720 * dev_put - release reference to device
3721 * @dev: network device
3723 * Release reference to device to allow it to be freed.
3725 static inline void dev_put(struct net_device *dev)
3727 this_cpu_dec(*dev->pcpu_refcnt);
3731 * dev_hold - get reference to device
3732 * @dev: network device
3734 * Hold reference to device to keep it from being freed.
3736 static inline void dev_hold(struct net_device *dev)
3738 this_cpu_inc(*dev->pcpu_refcnt);
3741 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3742 * and _off may be called from IRQ context, but it is caller
3743 * who is responsible for serialization of these calls.
3745 * The name carrier is inappropriate, these functions should really be
3746 * called netif_lowerlayer_*() because they represent the state of any
3747 * kind of lower layer not just hardware media.
3750 void linkwatch_init_dev(struct net_device *dev);
3751 void linkwatch_fire_event(struct net_device *dev);
3752 void linkwatch_forget_dev(struct net_device *dev);
3755 * netif_carrier_ok - test if carrier present
3756 * @dev: network device
3758 * Check if carrier is present on device
3760 static inline bool netif_carrier_ok(const struct net_device *dev)
3762 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3765 unsigned long dev_trans_start(struct net_device *dev);
3767 void __netdev_watchdog_up(struct net_device *dev);
3769 void netif_carrier_on(struct net_device *dev);
3771 void netif_carrier_off(struct net_device *dev);
3774 * netif_dormant_on - mark device as dormant.
3775 * @dev: network device
3777 * Mark device as dormant (as per RFC2863).
3779 * The dormant state indicates that the relevant interface is not
3780 * actually in a condition to pass packets (i.e., it is not 'up') but is
3781 * in a "pending" state, waiting for some external event. For "on-
3782 * demand" interfaces, this new state identifies the situation where the
3783 * interface is waiting for events to place it in the up state.
3785 static inline void netif_dormant_on(struct net_device *dev)
3787 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3788 linkwatch_fire_event(dev);
3792 * netif_dormant_off - set device as not dormant.
3793 * @dev: network device
3795 * Device is not in dormant state.
3797 static inline void netif_dormant_off(struct net_device *dev)
3799 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3800 linkwatch_fire_event(dev);
3804 * netif_dormant - test if device is dormant
3805 * @dev: network device
3807 * Check if device is dormant.
3809 static inline bool netif_dormant(const struct net_device *dev)
3811 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3816 * netif_oper_up - test if device is operational
3817 * @dev: network device
3819 * Check if carrier is operational
3821 static inline bool netif_oper_up(const struct net_device *dev)
3823 return (dev->operstate == IF_OPER_UP ||
3824 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3828 * netif_device_present - is device available or removed
3829 * @dev: network device
3831 * Check if device has not been removed from system.
3833 static inline bool netif_device_present(struct net_device *dev)
3835 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3838 void netif_device_detach(struct net_device *dev);
3840 void netif_device_attach(struct net_device *dev);
3843 * Network interface message level settings
3847 NETIF_MSG_DRV = 0x0001,
3848 NETIF_MSG_PROBE = 0x0002,
3849 NETIF_MSG_LINK = 0x0004,
3850 NETIF_MSG_TIMER = 0x0008,
3851 NETIF_MSG_IFDOWN = 0x0010,
3852 NETIF_MSG_IFUP = 0x0020,
3853 NETIF_MSG_RX_ERR = 0x0040,
3854 NETIF_MSG_TX_ERR = 0x0080,
3855 NETIF_MSG_TX_QUEUED = 0x0100,
3856 NETIF_MSG_INTR = 0x0200,
3857 NETIF_MSG_TX_DONE = 0x0400,
3858 NETIF_MSG_RX_STATUS = 0x0800,
3859 NETIF_MSG_PKTDATA = 0x1000,
3860 NETIF_MSG_HW = 0x2000,
3861 NETIF_MSG_WOL = 0x4000,
3864 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3865 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3866 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3867 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3868 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3869 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3870 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3871 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3872 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3873 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3874 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3875 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3876 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3877 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3878 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3880 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3883 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3884 return default_msg_enable_bits;
3885 if (debug_value == 0) /* no output */
3887 /* set low N bits */
3888 return (1U << debug_value) - 1;
3891 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3893 spin_lock(&txq->_xmit_lock);
3894 txq->xmit_lock_owner = cpu;
3897 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3899 __acquire(&txq->_xmit_lock);
3903 static inline void __netif_tx_release(struct netdev_queue *txq)
3905 __release(&txq->_xmit_lock);
3908 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3910 spin_lock_bh(&txq->_xmit_lock);
3911 txq->xmit_lock_owner = smp_processor_id();
3914 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3916 bool ok = spin_trylock(&txq->_xmit_lock);
3918 txq->xmit_lock_owner = smp_processor_id();
3922 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3924 txq->xmit_lock_owner = -1;
3925 spin_unlock(&txq->_xmit_lock);
3928 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3930 txq->xmit_lock_owner = -1;
3931 spin_unlock_bh(&txq->_xmit_lock);
3934 static inline void txq_trans_update(struct netdev_queue *txq)
3936 if (txq->xmit_lock_owner != -1)
3937 txq->trans_start = jiffies;
3940 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3941 static inline void netif_trans_update(struct net_device *dev)
3943 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3945 if (txq->trans_start != jiffies)
3946 txq->trans_start = jiffies;
3950 * netif_tx_lock - grab network device transmit lock
3951 * @dev: network device
3953 * Get network device transmit lock
3955 static inline void netif_tx_lock(struct net_device *dev)
3960 spin_lock(&dev->tx_global_lock);
3961 cpu = smp_processor_id();
3962 for (i = 0; i < dev->num_tx_queues; i++) {
3963 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3965 /* We are the only thread of execution doing a
3966 * freeze, but we have to grab the _xmit_lock in
3967 * order to synchronize with threads which are in
3968 * the ->hard_start_xmit() handler and already
3969 * checked the frozen bit.
3971 __netif_tx_lock(txq, cpu);
3972 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3973 __netif_tx_unlock(txq);
3977 static inline void netif_tx_lock_bh(struct net_device *dev)
3983 static inline void netif_tx_unlock(struct net_device *dev)
3987 for (i = 0; i < dev->num_tx_queues; i++) {
3988 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3990 /* No need to grab the _xmit_lock here. If the
3991 * queue is not stopped for another reason, we
3994 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3995 netif_schedule_queue(txq);
3997 spin_unlock(&dev->tx_global_lock);
4000 static inline void netif_tx_unlock_bh(struct net_device *dev)
4002 netif_tx_unlock(dev);
4006 #define HARD_TX_LOCK(dev, txq, cpu) { \
4007 if ((dev->features & NETIF_F_LLTX) == 0) { \
4008 __netif_tx_lock(txq, cpu); \
4010 __netif_tx_acquire(txq); \
4014 #define HARD_TX_TRYLOCK(dev, txq) \
4015 (((dev->features & NETIF_F_LLTX) == 0) ? \
4016 __netif_tx_trylock(txq) : \
4017 __netif_tx_acquire(txq))
4019 #define HARD_TX_UNLOCK(dev, txq) { \
4020 if ((dev->features & NETIF_F_LLTX) == 0) { \
4021 __netif_tx_unlock(txq); \
4023 __netif_tx_release(txq); \
4027 static inline void netif_tx_disable(struct net_device *dev)
4033 cpu = smp_processor_id();
4034 for (i = 0; i < dev->num_tx_queues; i++) {
4035 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4037 __netif_tx_lock(txq, cpu);
4038 netif_tx_stop_queue(txq);
4039 __netif_tx_unlock(txq);
4044 static inline void netif_addr_lock(struct net_device *dev)
4046 spin_lock(&dev->addr_list_lock);
4049 static inline void netif_addr_lock_nested(struct net_device *dev)
4051 int subclass = SINGLE_DEPTH_NESTING;
4053 if (dev->netdev_ops->ndo_get_lock_subclass)
4054 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
4056 spin_lock_nested(&dev->addr_list_lock, subclass);
4059 static inline void netif_addr_lock_bh(struct net_device *dev)
4061 spin_lock_bh(&dev->addr_list_lock);
4064 static inline void netif_addr_unlock(struct net_device *dev)
4066 spin_unlock(&dev->addr_list_lock);
4069 static inline void netif_addr_unlock_bh(struct net_device *dev)
4071 spin_unlock_bh(&dev->addr_list_lock);
4075 * dev_addrs walker. Should be used only for read access. Call with
4076 * rcu_read_lock held.
4078 #define for_each_dev_addr(dev, ha) \
4079 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4081 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4083 void ether_setup(struct net_device *dev);
4085 /* Support for loadable net-drivers */
4086 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4087 unsigned char name_assign_type,
4088 void (*setup)(struct net_device *),
4089 unsigned int txqs, unsigned int rxqs);
4090 int dev_get_valid_name(struct net *net, struct net_device *dev,
4093 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4094 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4096 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4097 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4100 int register_netdev(struct net_device *dev);
4101 void unregister_netdev(struct net_device *dev);
4103 /* General hardware address lists handling functions */
4104 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4105 struct netdev_hw_addr_list *from_list, int addr_len);
4106 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4107 struct netdev_hw_addr_list *from_list, int addr_len);
4108 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4109 struct net_device *dev,
4110 int (*sync)(struct net_device *, const unsigned char *),
4111 int (*unsync)(struct net_device *,
4112 const unsigned char *));
4113 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4114 struct net_device *dev,
4115 int (*sync)(struct net_device *,
4116 const unsigned char *, int),
4117 int (*unsync)(struct net_device *,
4118 const unsigned char *, int));
4119 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4120 struct net_device *dev,
4121 int (*unsync)(struct net_device *,
4122 const unsigned char *, int));
4123 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4124 struct net_device *dev,
4125 int (*unsync)(struct net_device *,
4126 const unsigned char *));
4127 void __hw_addr_init(struct netdev_hw_addr_list *list);
4129 /* Functions used for device addresses handling */
4130 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4131 unsigned char addr_type);
4132 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4133 unsigned char addr_type);
4134 void dev_addr_flush(struct net_device *dev);
4135 int dev_addr_init(struct net_device *dev);
4137 /* Functions used for unicast addresses handling */
4138 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4139 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4140 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4141 int dev_uc_sync(struct net_device *to, struct net_device *from);
4142 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4143 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4144 void dev_uc_flush(struct net_device *dev);
4145 void dev_uc_init(struct net_device *dev);
4148 * __dev_uc_sync - Synchonize device's unicast list
4149 * @dev: device to sync
4150 * @sync: function to call if address should be added
4151 * @unsync: function to call if address should be removed
4153 * Add newly added addresses to the interface, and release
4154 * addresses that have been deleted.
4156 static inline int __dev_uc_sync(struct net_device *dev,
4157 int (*sync)(struct net_device *,
4158 const unsigned char *),
4159 int (*unsync)(struct net_device *,
4160 const unsigned char *))
4162 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4166 * __dev_uc_unsync - Remove synchronized addresses from device
4167 * @dev: device to sync
4168 * @unsync: function to call if address should be removed
4170 * Remove all addresses that were added to the device by dev_uc_sync().
4172 static inline void __dev_uc_unsync(struct net_device *dev,
4173 int (*unsync)(struct net_device *,
4174 const unsigned char *))
4176 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4179 /* Functions used for multicast addresses handling */
4180 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4181 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4182 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4183 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4184 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4185 int dev_mc_sync(struct net_device *to, struct net_device *from);
4186 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4187 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4188 void dev_mc_flush(struct net_device *dev);
4189 void dev_mc_init(struct net_device *dev);
4192 * __dev_mc_sync - Synchonize device's multicast list
4193 * @dev: device to sync
4194 * @sync: function to call if address should be added
4195 * @unsync: function to call if address should be removed
4197 * Add newly added addresses to the interface, and release
4198 * addresses that have been deleted.
4200 static inline int __dev_mc_sync(struct net_device *dev,
4201 int (*sync)(struct net_device *,
4202 const unsigned char *),
4203 int (*unsync)(struct net_device *,
4204 const unsigned char *))
4206 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4210 * __dev_mc_unsync - Remove synchronized addresses from device
4211 * @dev: device to sync
4212 * @unsync: function to call if address should be removed
4214 * Remove all addresses that were added to the device by dev_mc_sync().
4216 static inline void __dev_mc_unsync(struct net_device *dev,
4217 int (*unsync)(struct net_device *,
4218 const unsigned char *))
4220 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4223 /* Functions used for secondary unicast and multicast support */
4224 void dev_set_rx_mode(struct net_device *dev);
4225 void __dev_set_rx_mode(struct net_device *dev);
4226 int dev_set_promiscuity(struct net_device *dev, int inc);
4227 int dev_set_allmulti(struct net_device *dev, int inc);
4228 void netdev_state_change(struct net_device *dev);
4229 void netdev_notify_peers(struct net_device *dev);
4230 void netdev_features_change(struct net_device *dev);
4231 /* Load a device via the kmod */
4232 void dev_load(struct net *net, const char *name);
4233 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4234 struct rtnl_link_stats64 *storage);
4235 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4236 const struct net_device_stats *netdev_stats);
4238 extern int netdev_max_backlog;
4239 extern int netdev_tstamp_prequeue;
4240 extern int weight_p;
4241 extern int dev_weight_rx_bias;
4242 extern int dev_weight_tx_bias;
4243 extern int dev_rx_weight;
4244 extern int dev_tx_weight;
4246 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4247 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4248 struct list_head **iter);
4249 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4250 struct list_head **iter);
4252 /* iterate through upper list, must be called under RCU read lock */
4253 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4254 for (iter = &(dev)->adj_list.upper, \
4255 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4257 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4259 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4260 int (*fn)(struct net_device *upper_dev,
4264 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4265 struct net_device *upper_dev);
4267 bool netdev_has_any_upper_dev(struct net_device *dev);
4269 void *netdev_lower_get_next_private(struct net_device *dev,
4270 struct list_head **iter);
4271 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4272 struct list_head **iter);
4274 #define netdev_for_each_lower_private(dev, priv, iter) \
4275 for (iter = (dev)->adj_list.lower.next, \
4276 priv = netdev_lower_get_next_private(dev, &(iter)); \
4278 priv = netdev_lower_get_next_private(dev, &(iter)))
4280 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4281 for (iter = &(dev)->adj_list.lower, \
4282 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4284 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4286 void *netdev_lower_get_next(struct net_device *dev,
4287 struct list_head **iter);
4289 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4290 for (iter = (dev)->adj_list.lower.next, \
4291 ldev = netdev_lower_get_next(dev, &(iter)); \
4293 ldev = netdev_lower_get_next(dev, &(iter)))
4295 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4296 struct list_head **iter);
4297 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4298 struct list_head **iter);
4300 int netdev_walk_all_lower_dev(struct net_device *dev,
4301 int (*fn)(struct net_device *lower_dev,
4304 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4305 int (*fn)(struct net_device *lower_dev,
4309 void *netdev_adjacent_get_private(struct list_head *adj_list);
4310 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4311 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4312 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4313 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4314 struct netlink_ext_ack *extack);
4315 int netdev_master_upper_dev_link(struct net_device *dev,
4316 struct net_device *upper_dev,
4317 void *upper_priv, void *upper_info,
4318 struct netlink_ext_ack *extack);
4319 void netdev_upper_dev_unlink(struct net_device *dev,
4320 struct net_device *upper_dev);
4321 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4322 void *netdev_lower_dev_get_private(struct net_device *dev,
4323 struct net_device *lower_dev);
4324 void netdev_lower_state_changed(struct net_device *lower_dev,
4325 void *lower_state_info);
4327 /* RSS keys are 40 or 52 bytes long */
4328 #define NETDEV_RSS_KEY_LEN 52
4329 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4330 void netdev_rss_key_fill(void *buffer, size_t len);
4332 int dev_get_nest_level(struct net_device *dev);
4333 int skb_checksum_help(struct sk_buff *skb);
4334 int skb_crc32c_csum_help(struct sk_buff *skb);
4335 int skb_csum_hwoffload_help(struct sk_buff *skb,
4336 const netdev_features_t features);
4338 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4339 netdev_features_t features, bool tx_path);
4340 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4341 netdev_features_t features);
4343 struct netdev_bonding_info {
4348 struct netdev_notifier_bonding_info {
4349 struct netdev_notifier_info info; /* must be first */
4350 struct netdev_bonding_info bonding_info;
4353 void netdev_bonding_info_change(struct net_device *dev,
4354 struct netdev_bonding_info *bonding_info);
4357 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4359 return __skb_gso_segment(skb, features, true);
4361 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4363 static inline bool can_checksum_protocol(netdev_features_t features,
4366 if (protocol == htons(ETH_P_FCOE))
4367 return !!(features & NETIF_F_FCOE_CRC);
4369 /* Assume this is an IP checksum (not SCTP CRC) */
4371 if (features & NETIF_F_HW_CSUM) {
4372 /* Can checksum everything */
4377 case htons(ETH_P_IP):
4378 return !!(features & NETIF_F_IP_CSUM);
4379 case htons(ETH_P_IPV6):
4380 return !!(features & NETIF_F_IPV6_CSUM);
4387 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4389 static inline void netdev_rx_csum_fault(struct net_device *dev,
4390 struct sk_buff *skb)
4394 /* rx skb timestamps */
4395 void net_enable_timestamp(void);
4396 void net_disable_timestamp(void);
4398 #ifdef CONFIG_PROC_FS
4399 int __init dev_proc_init(void);
4401 #define dev_proc_init() 0
4404 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4405 struct sk_buff *skb, struct net_device *dev,
4408 skb->xmit_more = more ? 1 : 0;
4409 return ops->ndo_start_xmit(skb, dev);
4412 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4413 struct netdev_queue *txq, bool more)
4415 const struct net_device_ops *ops = dev->netdev_ops;
4418 rc = __netdev_start_xmit(ops, skb, dev, more);
4419 if (rc == NETDEV_TX_OK)
4420 txq_trans_update(txq);
4425 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4427 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4430 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4432 return netdev_class_create_file_ns(class_attr, NULL);
4435 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4437 netdev_class_remove_file_ns(class_attr, NULL);
4440 extern const struct kobj_ns_type_operations net_ns_type_operations;
4442 const char *netdev_drivername(const struct net_device *dev);
4444 void linkwatch_run_queue(void);
4446 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4447 netdev_features_t f2)
4449 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4450 if (f1 & NETIF_F_HW_CSUM)
4451 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4453 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4459 static inline netdev_features_t netdev_get_wanted_features(
4460 struct net_device *dev)
4462 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4464 netdev_features_t netdev_increment_features(netdev_features_t all,
4465 netdev_features_t one, netdev_features_t mask);
4467 /* Allow TSO being used on stacked device :
4468 * Performing the GSO segmentation before last device
4469 * is a performance improvement.
4471 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4472 netdev_features_t mask)
4474 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4477 int __netdev_update_features(struct net_device *dev);
4478 void netdev_update_features(struct net_device *dev);
4479 void netdev_change_features(struct net_device *dev);
4481 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4482 struct net_device *dev);
4484 netdev_features_t passthru_features_check(struct sk_buff *skb,
4485 struct net_device *dev,
4486 netdev_features_t features);
4487 netdev_features_t netif_skb_features(struct sk_buff *skb);
4489 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4491 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4493 /* check flags correspondence */
4494 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4495 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4496 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4497 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4498 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4499 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4500 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4501 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4502 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4503 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4504 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4505 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4506 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4507 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4508 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4509 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4510 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4511 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4513 return (features & feature) == feature;
4516 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4518 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4519 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4522 static inline bool netif_needs_gso(struct sk_buff *skb,
4523 netdev_features_t features)
4525 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4526 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4527 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4530 static inline void netif_set_gso_max_size(struct net_device *dev,
4533 dev->gso_max_size = size;
4536 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4537 int pulled_hlen, u16 mac_offset,
4540 skb->protocol = protocol;
4541 skb->encapsulation = 1;
4542 skb_push(skb, pulled_hlen);
4543 skb_reset_transport_header(skb);
4544 skb->mac_header = mac_offset;
4545 skb->network_header = skb->mac_header + mac_len;
4546 skb->mac_len = mac_len;
4549 static inline bool netif_is_macsec(const struct net_device *dev)
4551 return dev->priv_flags & IFF_MACSEC;
4554 static inline bool netif_is_macvlan(const struct net_device *dev)
4556 return dev->priv_flags & IFF_MACVLAN;
4559 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4561 return dev->priv_flags & IFF_MACVLAN_PORT;
4564 static inline bool netif_is_bond_master(const struct net_device *dev)
4566 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4569 static inline bool netif_is_bond_slave(const struct net_device *dev)
4571 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4574 static inline bool netif_supports_nofcs(struct net_device *dev)
4576 return dev->priv_flags & IFF_SUPP_NOFCS;
4579 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4581 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4584 static inline bool netif_is_l3_master(const struct net_device *dev)
4586 return dev->priv_flags & IFF_L3MDEV_MASTER;
4589 static inline bool netif_is_l3_slave(const struct net_device *dev)
4591 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4594 static inline bool netif_is_bridge_master(const struct net_device *dev)
4596 return dev->priv_flags & IFF_EBRIDGE;
4599 static inline bool netif_is_bridge_port(const struct net_device *dev)
4601 return dev->priv_flags & IFF_BRIDGE_PORT;
4604 static inline bool netif_is_ovs_master(const struct net_device *dev)
4606 return dev->priv_flags & IFF_OPENVSWITCH;
4609 static inline bool netif_is_ovs_port(const struct net_device *dev)
4611 return dev->priv_flags & IFF_OVS_DATAPATH;
4614 static inline bool netif_is_team_master(const struct net_device *dev)
4616 return dev->priv_flags & IFF_TEAM;
4619 static inline bool netif_is_team_port(const struct net_device *dev)
4621 return dev->priv_flags & IFF_TEAM_PORT;
4624 static inline bool netif_is_lag_master(const struct net_device *dev)
4626 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4629 static inline bool netif_is_lag_port(const struct net_device *dev)
4631 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4634 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4636 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4639 static inline bool netif_is_failover(const struct net_device *dev)
4641 return dev->priv_flags & IFF_FAILOVER;
4644 static inline bool netif_is_failover_slave(const struct net_device *dev)
4646 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4649 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4650 static inline void netif_keep_dst(struct net_device *dev)
4652 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4655 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4656 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4658 /* TODO: reserve and use an additional IFF bit, if we get more users */
4659 return dev->priv_flags & IFF_MACSEC;
4662 extern struct pernet_operations __net_initdata loopback_net_ops;
4664 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4666 /* netdev_printk helpers, similar to dev_printk */
4668 static inline const char *netdev_name(const struct net_device *dev)
4670 if (!dev->name[0] || strchr(dev->name, '%'))
4671 return "(unnamed net_device)";
4675 static inline bool netdev_unregistering(const struct net_device *dev)
4677 return dev->reg_state == NETREG_UNREGISTERING;
4680 static inline const char *netdev_reg_state(const struct net_device *dev)
4682 switch (dev->reg_state) {
4683 case NETREG_UNINITIALIZED: return " (uninitialized)";
4684 case NETREG_REGISTERED: return "";
4685 case NETREG_UNREGISTERING: return " (unregistering)";
4686 case NETREG_UNREGISTERED: return " (unregistered)";
4687 case NETREG_RELEASED: return " (released)";
4688 case NETREG_DUMMY: return " (dummy)";
4691 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4692 return " (unknown)";
4695 __printf(3, 4) __cold
4696 void netdev_printk(const char *level, const struct net_device *dev,
4697 const char *format, ...);
4698 __printf(2, 3) __cold
4699 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4700 __printf(2, 3) __cold
4701 void netdev_alert(const struct net_device *dev, const char *format, ...);
4702 __printf(2, 3) __cold
4703 void netdev_crit(const struct net_device *dev, const char *format, ...);
4704 __printf(2, 3) __cold
4705 void netdev_err(const struct net_device *dev, const char *format, ...);
4706 __printf(2, 3) __cold
4707 void netdev_warn(const struct net_device *dev, const char *format, ...);
4708 __printf(2, 3) __cold
4709 void netdev_notice(const struct net_device *dev, const char *format, ...);
4710 __printf(2, 3) __cold
4711 void netdev_info(const struct net_device *dev, const char *format, ...);
4713 #define netdev_level_once(level, dev, fmt, ...) \
4715 static bool __print_once __read_mostly; \
4717 if (!__print_once) { \
4718 __print_once = true; \
4719 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4723 #define netdev_emerg_once(dev, fmt, ...) \
4724 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4725 #define netdev_alert_once(dev, fmt, ...) \
4726 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4727 #define netdev_crit_once(dev, fmt, ...) \
4728 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4729 #define netdev_err_once(dev, fmt, ...) \
4730 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4731 #define netdev_warn_once(dev, fmt, ...) \
4732 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4733 #define netdev_notice_once(dev, fmt, ...) \
4734 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4735 #define netdev_info_once(dev, fmt, ...) \
4736 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4738 #define MODULE_ALIAS_NETDEV(device) \
4739 MODULE_ALIAS("netdev-" device)
4741 #if defined(CONFIG_DYNAMIC_DEBUG)
4742 #define netdev_dbg(__dev, format, args...) \
4744 dynamic_netdev_dbg(__dev, format, ##args); \
4746 #elif defined(DEBUG)
4747 #define netdev_dbg(__dev, format, args...) \
4748 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4750 #define netdev_dbg(__dev, format, args...) \
4753 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4757 #if defined(VERBOSE_DEBUG)
4758 #define netdev_vdbg netdev_dbg
4761 #define netdev_vdbg(dev, format, args...) \
4764 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4770 * netdev_WARN() acts like dev_printk(), but with the key difference
4771 * of using a WARN/WARN_ON to get the message out, including the
4772 * file/line information and a backtrace.
4774 #define netdev_WARN(dev, format, args...) \
4775 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4776 netdev_reg_state(dev), ##args)
4778 #define netdev_WARN_ONCE(dev, format, args...) \
4779 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4780 netdev_reg_state(dev), ##args)
4782 /* netif printk helpers, similar to netdev_printk */
4784 #define netif_printk(priv, type, level, dev, fmt, args...) \
4786 if (netif_msg_##type(priv)) \
4787 netdev_printk(level, (dev), fmt, ##args); \
4790 #define netif_level(level, priv, type, dev, fmt, args...) \
4792 if (netif_msg_##type(priv)) \
4793 netdev_##level(dev, fmt, ##args); \
4796 #define netif_emerg(priv, type, dev, fmt, args...) \
4797 netif_level(emerg, priv, type, dev, fmt, ##args)
4798 #define netif_alert(priv, type, dev, fmt, args...) \
4799 netif_level(alert, priv, type, dev, fmt, ##args)
4800 #define netif_crit(priv, type, dev, fmt, args...) \
4801 netif_level(crit, priv, type, dev, fmt, ##args)
4802 #define netif_err(priv, type, dev, fmt, args...) \
4803 netif_level(err, priv, type, dev, fmt, ##args)
4804 #define netif_warn(priv, type, dev, fmt, args...) \
4805 netif_level(warn, priv, type, dev, fmt, ##args)
4806 #define netif_notice(priv, type, dev, fmt, args...) \
4807 netif_level(notice, priv, type, dev, fmt, ##args)
4808 #define netif_info(priv, type, dev, fmt, args...) \
4809 netif_level(info, priv, type, dev, fmt, ##args)
4811 #if defined(CONFIG_DYNAMIC_DEBUG)
4812 #define netif_dbg(priv, type, netdev, format, args...) \
4814 if (netif_msg_##type(priv)) \
4815 dynamic_netdev_dbg(netdev, format, ##args); \
4817 #elif defined(DEBUG)
4818 #define netif_dbg(priv, type, dev, format, args...) \
4819 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4821 #define netif_dbg(priv, type, dev, format, args...) \
4824 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4829 /* if @cond then downgrade to debug, else print at @level */
4830 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4833 netif_dbg(priv, type, netdev, fmt, ##args); \
4835 netif_ ## level(priv, type, netdev, fmt, ##args); \
4838 #if defined(VERBOSE_DEBUG)
4839 #define netif_vdbg netif_dbg
4841 #define netif_vdbg(priv, type, dev, format, args...) \
4844 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4850 * The list of packet types we will receive (as opposed to discard)
4851 * and the routines to invoke.
4853 * Why 16. Because with 16 the only overlap we get on a hash of the
4854 * low nibble of the protocol value is RARP/SNAP/X.25.
4868 #define PTYPE_HASH_SIZE (16)
4869 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4871 #endif /* _LINUX_NETDEVICE_H */