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 * select_queue_fallback_t fallback);
991 * Called to decide which queue to use when device supports multiple
994 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
995 * This function is called to allow device receiver to make
996 * changes to configuration when multicast or promiscuous is enabled.
998 * void (*ndo_set_rx_mode)(struct net_device *dev);
999 * This function is called device changes address list filtering.
1000 * If driver handles unicast address filtering, it should set
1001 * IFF_UNICAST_FLT in its priv_flags.
1003 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1004 * This function is called when the Media Access Control address
1005 * needs to be changed. If this interface is not defined, the
1006 * MAC address can not be changed.
1008 * int (*ndo_validate_addr)(struct net_device *dev);
1009 * Test if Media Access Control address is valid for the device.
1011 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1012 * Called when a user requests an ioctl which can't be handled by
1013 * the generic interface code. If not defined ioctls return
1014 * not supported error code.
1016 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1017 * Used to set network devices bus interface parameters. This interface
1018 * is retained for legacy reasons; new devices should use the bus
1019 * interface (PCI) for low level management.
1021 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1022 * Called when a user wants to change the Maximum Transfer Unit
1025 * void (*ndo_tx_timeout)(struct net_device *dev);
1026 * Callback used when the transmitter has not made any progress
1027 * for dev->watchdog ticks.
1029 * void (*ndo_get_stats64)(struct net_device *dev,
1030 * struct rtnl_link_stats64 *storage);
1031 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1032 * Called when a user wants to get the network device usage
1033 * statistics. Drivers must do one of the following:
1034 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1035 * rtnl_link_stats64 structure passed by the caller.
1036 * 2. Define @ndo_get_stats to update a net_device_stats structure
1037 * (which should normally be dev->stats) and return a pointer to
1038 * it. The structure may be changed asynchronously only if each
1039 * field is written atomically.
1040 * 3. Update dev->stats asynchronously and atomically, and define
1041 * neither operation.
1043 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1044 * Return true if this device supports offload stats of this attr_id.
1046 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1048 * Get statistics for offload operations by attr_id. Write it into the
1049 * attr_data pointer.
1051 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1052 * If device supports VLAN filtering this function is called when a
1053 * VLAN id is registered.
1055 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1056 * If device supports VLAN filtering this function is called when a
1057 * VLAN id is unregistered.
1059 * void (*ndo_poll_controller)(struct net_device *dev);
1061 * SR-IOV management functions.
1062 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1063 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1064 * u8 qos, __be16 proto);
1065 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1067 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1068 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1069 * int (*ndo_get_vf_config)(struct net_device *dev,
1070 * int vf, struct ifla_vf_info *ivf);
1071 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1072 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1073 * struct nlattr *port[]);
1075 * Enable or disable the VF ability to query its RSS Redirection Table and
1076 * Hash Key. This is needed since on some devices VF share this information
1077 * with PF and querying it may introduce a theoretical security risk.
1078 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1079 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1080 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1082 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1083 * This is always called from the stack with the rtnl lock held and netif
1084 * tx queues stopped. This allows the netdevice to perform queue
1085 * management safely.
1087 * Fiber Channel over Ethernet (FCoE) offload functions.
1088 * int (*ndo_fcoe_enable)(struct net_device *dev);
1089 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1090 * so the underlying device can perform whatever needed configuration or
1091 * initialization to support acceleration of FCoE traffic.
1093 * int (*ndo_fcoe_disable)(struct net_device *dev);
1094 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1095 * so the underlying device can perform whatever needed clean-ups to
1096 * stop supporting acceleration of FCoE traffic.
1098 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1099 * struct scatterlist *sgl, unsigned int sgc);
1100 * Called when the FCoE Initiator wants to initialize an I/O that
1101 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1102 * perform necessary setup and returns 1 to indicate the device is set up
1103 * successfully to perform DDP on this I/O, otherwise this returns 0.
1105 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1106 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1107 * indicated by the FC exchange id 'xid', so the underlying device can
1108 * clean up and reuse resources for later DDP requests.
1110 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1111 * struct scatterlist *sgl, unsigned int sgc);
1112 * Called when the FCoE Target wants to initialize an I/O that
1113 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1114 * perform necessary setup and returns 1 to indicate the device is set up
1115 * successfully to perform DDP on this I/O, otherwise this returns 0.
1117 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1118 * struct netdev_fcoe_hbainfo *hbainfo);
1119 * Called when the FCoE Protocol stack wants information on the underlying
1120 * device. This information is utilized by the FCoE protocol stack to
1121 * register attributes with Fiber Channel management service as per the
1122 * FC-GS Fabric Device Management Information(FDMI) specification.
1124 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1125 * Called when the underlying device wants to override default World Wide
1126 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1127 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1128 * protocol stack to use.
1131 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1132 * u16 rxq_index, u32 flow_id);
1133 * Set hardware filter for RFS. rxq_index is the target queue index;
1134 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1135 * Return the filter ID on success, or a negative error code.
1137 * Slave management functions (for bridge, bonding, etc).
1138 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1139 * Called to make another netdev an underling.
1141 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1142 * Called to release previously enslaved netdev.
1144 * Feature/offload setting functions.
1145 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1146 * netdev_features_t features);
1147 * Adjusts the requested feature flags according to device-specific
1148 * constraints, and returns the resulting flags. Must not modify
1151 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1152 * Called to update device configuration to new features. Passed
1153 * feature set might be less than what was returned by ndo_fix_features()).
1154 * Must return >0 or -errno if it changed dev->features itself.
1156 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1157 * struct net_device *dev,
1158 * const unsigned char *addr, u16 vid, u16 flags,
1159 * struct netlink_ext_ack *extack);
1160 * Adds an FDB entry to dev for addr.
1161 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1162 * struct net_device *dev,
1163 * const unsigned char *addr, u16 vid)
1164 * Deletes the FDB entry from dev coresponding to addr.
1165 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1166 * struct net_device *dev, struct net_device *filter_dev,
1168 * Used to add FDB entries to dump requests. Implementers should add
1169 * entries to skb and update idx with the number of entries.
1171 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1172 * u16 flags, struct netlink_ext_ack *extack)
1173 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1174 * struct net_device *dev, u32 filter_mask,
1176 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1179 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1180 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1181 * which do not represent real hardware may define this to allow their
1182 * userspace components to manage their virtual carrier state. Devices
1183 * that determine carrier state from physical hardware properties (eg
1184 * network cables) or protocol-dependent mechanisms (eg
1185 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1187 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1188 * struct netdev_phys_item_id *ppid);
1189 * Called to get ID of physical port of this device. If driver does
1190 * not implement this, it is assumed that the hw is not able to have
1191 * multiple net devices on single physical port.
1193 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1194 * struct netdev_phys_item_id *ppid)
1195 * Called to get the parent ID of the physical port of this device.
1197 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1198 * struct udp_tunnel_info *ti);
1199 * Called by UDP tunnel to notify a driver about the UDP port and socket
1200 * address family that a UDP tunnel is listnening to. It is called only
1201 * when a new port starts listening. The operation is protected by the
1204 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1205 * struct udp_tunnel_info *ti);
1206 * Called by UDP tunnel to notify the driver about a UDP port and socket
1207 * address family that the UDP tunnel is not listening to anymore. The
1208 * operation is protected by the RTNL.
1210 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1211 * struct net_device *dev)
1212 * Called by upper layer devices to accelerate switching or other
1213 * station functionality into hardware. 'pdev is the lowerdev
1214 * to use for the offload and 'dev' is the net device that will
1215 * back the offload. Returns a pointer to the private structure
1216 * the upper layer will maintain.
1217 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1218 * Called by upper layer device to delete the station created
1219 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1220 * the station and priv is the structure returned by the add
1222 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1223 * int queue_index, u32 maxrate);
1224 * Called when a user wants to set a max-rate limitation of specific
1226 * int (*ndo_get_iflink)(const struct net_device *dev);
1227 * Called to get the iflink value of this device.
1228 * void (*ndo_change_proto_down)(struct net_device *dev,
1230 * This function is used to pass protocol port error state information
1231 * to the switch driver. The switch driver can react to the proto_down
1232 * by doing a phys down on the associated switch port.
1233 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1234 * This function is used to get egress tunnel information for given skb.
1235 * This is useful for retrieving outer tunnel header parameters while
1237 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1238 * This function is used to specify the headroom that the skb must
1239 * consider when allocation skb during packet reception. Setting
1240 * appropriate rx headroom value allows avoiding skb head copy on
1241 * forward. Setting a negative value resets the rx headroom to the
1243 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1244 * This function is used to set or query state related to XDP on the
1245 * netdevice and manage BPF offload. See definition of
1246 * enum bpf_netdev_command for details.
1247 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1249 * This function is used to submit @n XDP packets for transmit on a
1250 * netdevice. Returns number of frames successfully transmitted, frames
1251 * that got dropped are freed/returned via xdp_return_frame().
1252 * Returns negative number, means general error invoking ndo, meaning
1253 * no frames were xmit'ed and core-caller will free all frames.
1254 * struct devlink *(*ndo_get_devlink)(struct net_device *dev);
1255 * Get devlink instance associated with a given netdev.
1256 * Called with a reference on the netdevice and devlink locks only,
1257 * rtnl_lock is not held.
1259 struct net_device_ops {
1260 int (*ndo_init)(struct net_device *dev);
1261 void (*ndo_uninit)(struct net_device *dev);
1262 int (*ndo_open)(struct net_device *dev);
1263 int (*ndo_stop)(struct net_device *dev);
1264 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1265 struct net_device *dev);
1266 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1267 struct net_device *dev,
1268 netdev_features_t features);
1269 u16 (*ndo_select_queue)(struct net_device *dev,
1270 struct sk_buff *skb,
1271 struct net_device *sb_dev,
1272 select_queue_fallback_t fallback);
1273 void (*ndo_change_rx_flags)(struct net_device *dev,
1275 void (*ndo_set_rx_mode)(struct net_device *dev);
1276 int (*ndo_set_mac_address)(struct net_device *dev,
1278 int (*ndo_validate_addr)(struct net_device *dev);
1279 int (*ndo_do_ioctl)(struct net_device *dev,
1280 struct ifreq *ifr, int cmd);
1281 int (*ndo_set_config)(struct net_device *dev,
1283 int (*ndo_change_mtu)(struct net_device *dev,
1285 int (*ndo_neigh_setup)(struct net_device *dev,
1286 struct neigh_parms *);
1287 void (*ndo_tx_timeout) (struct net_device *dev);
1289 void (*ndo_get_stats64)(struct net_device *dev,
1290 struct rtnl_link_stats64 *storage);
1291 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1292 int (*ndo_get_offload_stats)(int attr_id,
1293 const struct net_device *dev,
1295 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1297 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1298 __be16 proto, u16 vid);
1299 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1300 __be16 proto, u16 vid);
1301 #ifdef CONFIG_NET_POLL_CONTROLLER
1302 void (*ndo_poll_controller)(struct net_device *dev);
1303 int (*ndo_netpoll_setup)(struct net_device *dev,
1304 struct netpoll_info *info);
1305 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1307 int (*ndo_set_vf_mac)(struct net_device *dev,
1308 int queue, u8 *mac);
1309 int (*ndo_set_vf_vlan)(struct net_device *dev,
1310 int queue, u16 vlan,
1311 u8 qos, __be16 proto);
1312 int (*ndo_set_vf_rate)(struct net_device *dev,
1313 int vf, int min_tx_rate,
1315 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1316 int vf, bool setting);
1317 int (*ndo_set_vf_trust)(struct net_device *dev,
1318 int vf, bool setting);
1319 int (*ndo_get_vf_config)(struct net_device *dev,
1321 struct ifla_vf_info *ivf);
1322 int (*ndo_set_vf_link_state)(struct net_device *dev,
1323 int vf, int link_state);
1324 int (*ndo_get_vf_stats)(struct net_device *dev,
1326 struct ifla_vf_stats
1328 int (*ndo_set_vf_port)(struct net_device *dev,
1330 struct nlattr *port[]);
1331 int (*ndo_get_vf_port)(struct net_device *dev,
1332 int vf, struct sk_buff *skb);
1333 int (*ndo_set_vf_guid)(struct net_device *dev,
1336 int (*ndo_set_vf_rss_query_en)(
1337 struct net_device *dev,
1338 int vf, bool setting);
1339 int (*ndo_setup_tc)(struct net_device *dev,
1340 enum tc_setup_type type,
1342 #if IS_ENABLED(CONFIG_FCOE)
1343 int (*ndo_fcoe_enable)(struct net_device *dev);
1344 int (*ndo_fcoe_disable)(struct net_device *dev);
1345 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1347 struct scatterlist *sgl,
1349 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1351 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1353 struct scatterlist *sgl,
1355 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1356 struct netdev_fcoe_hbainfo *hbainfo);
1359 #if IS_ENABLED(CONFIG_LIBFCOE)
1360 #define NETDEV_FCOE_WWNN 0
1361 #define NETDEV_FCOE_WWPN 1
1362 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1363 u64 *wwn, int type);
1366 #ifdef CONFIG_RFS_ACCEL
1367 int (*ndo_rx_flow_steer)(struct net_device *dev,
1368 const struct sk_buff *skb,
1372 int (*ndo_add_slave)(struct net_device *dev,
1373 struct net_device *slave_dev,
1374 struct netlink_ext_ack *extack);
1375 int (*ndo_del_slave)(struct net_device *dev,
1376 struct net_device *slave_dev);
1377 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1378 netdev_features_t features);
1379 int (*ndo_set_features)(struct net_device *dev,
1380 netdev_features_t features);
1381 int (*ndo_neigh_construct)(struct net_device *dev,
1382 struct neighbour *n);
1383 void (*ndo_neigh_destroy)(struct net_device *dev,
1384 struct neighbour *n);
1386 int (*ndo_fdb_add)(struct ndmsg *ndm,
1387 struct nlattr *tb[],
1388 struct net_device *dev,
1389 const unsigned char *addr,
1392 struct netlink_ext_ack *extack);
1393 int (*ndo_fdb_del)(struct ndmsg *ndm,
1394 struct nlattr *tb[],
1395 struct net_device *dev,
1396 const unsigned char *addr,
1398 int (*ndo_fdb_dump)(struct sk_buff *skb,
1399 struct netlink_callback *cb,
1400 struct net_device *dev,
1401 struct net_device *filter_dev,
1403 int (*ndo_fdb_get)(struct sk_buff *skb,
1404 struct nlattr *tb[],
1405 struct net_device *dev,
1406 const unsigned char *addr,
1407 u16 vid, u32 portid, u32 seq,
1408 struct netlink_ext_ack *extack);
1409 int (*ndo_bridge_setlink)(struct net_device *dev,
1410 struct nlmsghdr *nlh,
1412 struct netlink_ext_ack *extack);
1413 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1415 struct net_device *dev,
1418 int (*ndo_bridge_dellink)(struct net_device *dev,
1419 struct nlmsghdr *nlh,
1421 int (*ndo_change_carrier)(struct net_device *dev,
1423 int (*ndo_get_phys_port_id)(struct net_device *dev,
1424 struct netdev_phys_item_id *ppid);
1425 int (*ndo_get_port_parent_id)(struct net_device *dev,
1426 struct netdev_phys_item_id *ppid);
1427 int (*ndo_get_phys_port_name)(struct net_device *dev,
1428 char *name, size_t len);
1429 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1430 struct udp_tunnel_info *ti);
1431 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1432 struct udp_tunnel_info *ti);
1433 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1434 struct net_device *dev);
1435 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1438 int (*ndo_get_lock_subclass)(struct net_device *dev);
1439 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1442 int (*ndo_get_iflink)(const struct net_device *dev);
1443 int (*ndo_change_proto_down)(struct net_device *dev,
1445 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1446 struct sk_buff *skb);
1447 void (*ndo_set_rx_headroom)(struct net_device *dev,
1448 int needed_headroom);
1449 int (*ndo_bpf)(struct net_device *dev,
1450 struct netdev_bpf *bpf);
1451 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1452 struct xdp_frame **xdp,
1454 int (*ndo_xsk_async_xmit)(struct net_device *dev,
1456 struct devlink * (*ndo_get_devlink)(struct net_device *dev);
1460 * enum net_device_priv_flags - &struct net_device priv_flags
1462 * These are the &struct net_device, they are only set internally
1463 * by drivers and used in the kernel. These flags are invisible to
1464 * userspace; this means that the order of these flags can change
1465 * during any kernel release.
1467 * You should have a pretty good reason to be extending these flags.
1469 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1470 * @IFF_EBRIDGE: Ethernet bridging device
1471 * @IFF_BONDING: bonding master or slave
1472 * @IFF_ISATAP: ISATAP interface (RFC4214)
1473 * @IFF_WAN_HDLC: WAN HDLC device
1474 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1476 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1477 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1478 * @IFF_MACVLAN_PORT: device used as macvlan port
1479 * @IFF_BRIDGE_PORT: device used as bridge port
1480 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1481 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1482 * @IFF_UNICAST_FLT: Supports unicast filtering
1483 * @IFF_TEAM_PORT: device used as team port
1484 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1485 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1486 * change when it's running
1487 * @IFF_MACVLAN: Macvlan device
1488 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1489 * underlying stacked devices
1490 * @IFF_L3MDEV_MASTER: device is an L3 master device
1491 * @IFF_NO_QUEUE: device can run without qdisc attached
1492 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1493 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1494 * @IFF_TEAM: device is a team device
1495 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1496 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1497 * entity (i.e. the master device for bridged veth)
1498 * @IFF_MACSEC: device is a MACsec device
1499 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1500 * @IFF_FAILOVER: device is a failover master device
1501 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1502 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1504 enum netdev_priv_flags {
1505 IFF_802_1Q_VLAN = 1<<0,
1509 IFF_WAN_HDLC = 1<<4,
1510 IFF_XMIT_DST_RELEASE = 1<<5,
1511 IFF_DONT_BRIDGE = 1<<6,
1512 IFF_DISABLE_NETPOLL = 1<<7,
1513 IFF_MACVLAN_PORT = 1<<8,
1514 IFF_BRIDGE_PORT = 1<<9,
1515 IFF_OVS_DATAPATH = 1<<10,
1516 IFF_TX_SKB_SHARING = 1<<11,
1517 IFF_UNICAST_FLT = 1<<12,
1518 IFF_TEAM_PORT = 1<<13,
1519 IFF_SUPP_NOFCS = 1<<14,
1520 IFF_LIVE_ADDR_CHANGE = 1<<15,
1521 IFF_MACVLAN = 1<<16,
1522 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1523 IFF_L3MDEV_MASTER = 1<<18,
1524 IFF_NO_QUEUE = 1<<19,
1525 IFF_OPENVSWITCH = 1<<20,
1526 IFF_L3MDEV_SLAVE = 1<<21,
1528 IFF_RXFH_CONFIGURED = 1<<23,
1529 IFF_PHONY_HEADROOM = 1<<24,
1531 IFF_NO_RX_HANDLER = 1<<26,
1532 IFF_FAILOVER = 1<<27,
1533 IFF_FAILOVER_SLAVE = 1<<28,
1534 IFF_L3MDEV_RX_HANDLER = 1<<29,
1537 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1538 #define IFF_EBRIDGE IFF_EBRIDGE
1539 #define IFF_BONDING IFF_BONDING
1540 #define IFF_ISATAP IFF_ISATAP
1541 #define IFF_WAN_HDLC IFF_WAN_HDLC
1542 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1543 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1544 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1545 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1546 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1547 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1548 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1549 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1550 #define IFF_TEAM_PORT IFF_TEAM_PORT
1551 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1552 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1553 #define IFF_MACVLAN IFF_MACVLAN
1554 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1555 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1556 #define IFF_NO_QUEUE IFF_NO_QUEUE
1557 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1558 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1559 #define IFF_TEAM IFF_TEAM
1560 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1561 #define IFF_MACSEC IFF_MACSEC
1562 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1563 #define IFF_FAILOVER IFF_FAILOVER
1564 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1565 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1568 * struct net_device - The DEVICE structure.
1570 * Actually, this whole structure is a big mistake. It mixes I/O
1571 * data with strictly "high-level" data, and it has to know about
1572 * almost every data structure used in the INET module.
1574 * @name: This is the first field of the "visible" part of this structure
1575 * (i.e. as seen by users in the "Space.c" file). It is the name
1578 * @name_hlist: Device name hash chain, please keep it close to name[]
1579 * @ifalias: SNMP alias
1580 * @mem_end: Shared memory end
1581 * @mem_start: Shared memory start
1582 * @base_addr: Device I/O address
1583 * @irq: Device IRQ number
1585 * @state: Generic network queuing layer state, see netdev_state_t
1586 * @dev_list: The global list of network devices
1587 * @napi_list: List entry used for polling NAPI devices
1588 * @unreg_list: List entry when we are unregistering the
1589 * device; see the function unregister_netdev
1590 * @close_list: List entry used when we are closing the device
1591 * @ptype_all: Device-specific packet handlers for all protocols
1592 * @ptype_specific: Device-specific, protocol-specific packet handlers
1594 * @adj_list: Directly linked devices, like slaves for bonding
1595 * @features: Currently active device features
1596 * @hw_features: User-changeable features
1598 * @wanted_features: User-requested features
1599 * @vlan_features: Mask of features inheritable by VLAN devices
1601 * @hw_enc_features: Mask of features inherited by encapsulating devices
1602 * This field indicates what encapsulation
1603 * offloads the hardware is capable of doing,
1604 * and drivers will need to set them appropriately.
1606 * @mpls_features: Mask of features inheritable by MPLS
1608 * @ifindex: interface index
1609 * @group: The group the device belongs to
1611 * @stats: Statistics struct, which was left as a legacy, use
1612 * rtnl_link_stats64 instead
1614 * @rx_dropped: Dropped packets by core network,
1615 * do not use this in drivers
1616 * @tx_dropped: Dropped packets by core network,
1617 * do not use this in drivers
1618 * @rx_nohandler: nohandler dropped packets by core network on
1619 * inactive devices, do not use this in drivers
1620 * @carrier_up_count: Number of times the carrier has been up
1621 * @carrier_down_count: Number of times the carrier has been down
1623 * @wireless_handlers: List of functions to handle Wireless Extensions,
1625 * see <net/iw_handler.h> for details.
1626 * @wireless_data: Instance data managed by the core of wireless extensions
1628 * @netdev_ops: Includes several pointers to callbacks,
1629 * if one wants to override the ndo_*() functions
1630 * @ethtool_ops: Management operations
1631 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1632 * discovery handling. Necessary for e.g. 6LoWPAN.
1633 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1634 * of Layer 2 headers.
1636 * @flags: Interface flags (a la BSD)
1637 * @priv_flags: Like 'flags' but invisible to userspace,
1638 * see if.h for the definitions
1639 * @gflags: Global flags ( kept as legacy )
1640 * @padded: How much padding added by alloc_netdev()
1641 * @operstate: RFC2863 operstate
1642 * @link_mode: Mapping policy to operstate
1643 * @if_port: Selectable AUI, TP, ...
1645 * @mtu: Interface MTU value
1646 * @min_mtu: Interface Minimum MTU value
1647 * @max_mtu: Interface Maximum MTU value
1648 * @type: Interface hardware type
1649 * @hard_header_len: Maximum hardware header length.
1650 * @min_header_len: Minimum hardware header length
1652 * @needed_headroom: Extra headroom the hardware may need, but not in all
1653 * cases can this be guaranteed
1654 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1655 * cases can this be guaranteed. Some cases also use
1656 * LL_MAX_HEADER instead to allocate the skb
1658 * interface address info:
1660 * @perm_addr: Permanent hw address
1661 * @addr_assign_type: Hw address assignment type
1662 * @addr_len: Hardware address length
1663 * @neigh_priv_len: Used in neigh_alloc()
1664 * @dev_id: Used to differentiate devices that share
1665 * the same link layer address
1666 * @dev_port: Used to differentiate devices that share
1668 * @addr_list_lock: XXX: need comments on this one
1669 * @uc_promisc: Counter that indicates promiscuous mode
1670 * has been enabled due to the need to listen to
1671 * additional unicast addresses in a device that
1672 * does not implement ndo_set_rx_mode()
1673 * @uc: unicast mac addresses
1674 * @mc: multicast mac addresses
1675 * @dev_addrs: list of device hw addresses
1676 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1677 * @promiscuity: Number of times the NIC is told to work in
1678 * promiscuous mode; if it becomes 0 the NIC will
1679 * exit promiscuous mode
1680 * @allmulti: Counter, enables or disables allmulticast mode
1682 * @vlan_info: VLAN info
1683 * @dsa_ptr: dsa specific data
1684 * @tipc_ptr: TIPC specific data
1685 * @atalk_ptr: AppleTalk link
1686 * @ip_ptr: IPv4 specific data
1687 * @dn_ptr: DECnet specific data
1688 * @ip6_ptr: IPv6 specific data
1689 * @ax25_ptr: AX.25 specific data
1690 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1692 * @dev_addr: Hw address (before bcast,
1693 * because most packets are unicast)
1695 * @_rx: Array of RX queues
1696 * @num_rx_queues: Number of RX queues
1697 * allocated at register_netdev() time
1698 * @real_num_rx_queues: Number of RX queues currently active in device
1700 * @rx_handler: handler for received packets
1701 * @rx_handler_data: XXX: need comments on this one
1702 * @miniq_ingress: ingress/clsact qdisc specific data for
1703 * ingress processing
1704 * @ingress_queue: XXX: need comments on this one
1705 * @broadcast: hw bcast address
1707 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1708 * indexed by RX queue number. Assigned by driver.
1709 * This must only be set if the ndo_rx_flow_steer
1710 * operation is defined
1711 * @index_hlist: Device index hash chain
1713 * @_tx: Array of TX queues
1714 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1715 * @real_num_tx_queues: Number of TX queues currently active in device
1716 * @qdisc: Root qdisc from userspace point of view
1717 * @tx_queue_len: Max frames per queue allowed
1718 * @tx_global_lock: XXX: need comments on this one
1720 * @xps_maps: XXX: need comments on this one
1721 * @miniq_egress: clsact qdisc specific data for
1723 * @watchdog_timeo: Represents the timeout that is used by
1724 * the watchdog (see dev_watchdog())
1725 * @watchdog_timer: List of timers
1727 * @pcpu_refcnt: Number of references to this device
1728 * @todo_list: Delayed register/unregister
1729 * @link_watch_list: XXX: need comments on this one
1731 * @reg_state: Register/unregister state machine
1732 * @dismantle: Device is going to be freed
1733 * @rtnl_link_state: This enum represents the phases of creating
1736 * @needs_free_netdev: Should unregister perform free_netdev?
1737 * @priv_destructor: Called from unregister
1738 * @npinfo: XXX: need comments on this one
1739 * @nd_net: Network namespace this network device is inside
1741 * @ml_priv: Mid-layer private
1742 * @lstats: Loopback statistics
1743 * @tstats: Tunnel statistics
1744 * @dstats: Dummy statistics
1745 * @vstats: Virtual ethernet statistics
1750 * @dev: Class/net/name entry
1751 * @sysfs_groups: Space for optional device, statistics and wireless
1754 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1755 * @rtnl_link_ops: Rtnl_link_ops
1757 * @gso_max_size: Maximum size of generic segmentation offload
1758 * @gso_max_segs: Maximum number of segments that can be passed to the
1761 * @dcbnl_ops: Data Center Bridging netlink ops
1762 * @num_tc: Number of traffic classes in the net device
1763 * @tc_to_txq: XXX: need comments on this one
1764 * @prio_tc_map: XXX: need comments on this one
1766 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1768 * @priomap: XXX: need comments on this one
1769 * @phydev: Physical device may attach itself
1770 * for hardware timestamping
1771 * @sfp_bus: attached &struct sfp_bus structure.
1773 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1774 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1776 * @proto_down: protocol port state information can be sent to the
1777 * switch driver and used to set the phys state of the
1780 * @wol_enabled: Wake-on-LAN is enabled
1782 * FIXME: cleanup struct net_device such that network protocol info
1787 char name[IFNAMSIZ];
1788 struct hlist_node name_hlist;
1789 struct dev_ifalias __rcu *ifalias;
1791 * I/O specific fields
1792 * FIXME: Merge these and struct ifmap into one
1794 unsigned long mem_end;
1795 unsigned long mem_start;
1796 unsigned long base_addr;
1800 * Some hardware also needs these fields (state,dev_list,
1801 * napi_list,unreg_list,close_list) but they are not
1802 * part of the usual set specified in Space.c.
1805 unsigned long state;
1807 struct list_head dev_list;
1808 struct list_head napi_list;
1809 struct list_head unreg_list;
1810 struct list_head close_list;
1811 struct list_head ptype_all;
1812 struct list_head ptype_specific;
1815 struct list_head upper;
1816 struct list_head lower;
1819 netdev_features_t features;
1820 netdev_features_t hw_features;
1821 netdev_features_t wanted_features;
1822 netdev_features_t vlan_features;
1823 netdev_features_t hw_enc_features;
1824 netdev_features_t mpls_features;
1825 netdev_features_t gso_partial_features;
1830 struct net_device_stats stats;
1832 atomic_long_t rx_dropped;
1833 atomic_long_t tx_dropped;
1834 atomic_long_t rx_nohandler;
1836 /* Stats to monitor link on/off, flapping */
1837 atomic_t carrier_up_count;
1838 atomic_t carrier_down_count;
1840 #ifdef CONFIG_WIRELESS_EXT
1841 const struct iw_handler_def *wireless_handlers;
1842 struct iw_public_data *wireless_data;
1844 const struct net_device_ops *netdev_ops;
1845 const struct ethtool_ops *ethtool_ops;
1846 #ifdef CONFIG_NET_L3_MASTER_DEV
1847 const struct l3mdev_ops *l3mdev_ops;
1849 #if IS_ENABLED(CONFIG_IPV6)
1850 const struct ndisc_ops *ndisc_ops;
1853 #ifdef CONFIG_XFRM_OFFLOAD
1854 const struct xfrmdev_ops *xfrmdev_ops;
1857 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1858 const struct tlsdev_ops *tlsdev_ops;
1861 const struct header_ops *header_ops;
1864 unsigned int priv_flags;
1866 unsigned short gflags;
1867 unsigned short padded;
1869 unsigned char operstate;
1870 unsigned char link_mode;
1872 unsigned char if_port;
1876 unsigned int min_mtu;
1877 unsigned int max_mtu;
1878 unsigned short type;
1879 unsigned short hard_header_len;
1880 unsigned char min_header_len;
1882 unsigned short needed_headroom;
1883 unsigned short needed_tailroom;
1885 /* Interface address info. */
1886 unsigned char perm_addr[MAX_ADDR_LEN];
1887 unsigned char addr_assign_type;
1888 unsigned char addr_len;
1889 unsigned short neigh_priv_len;
1890 unsigned short dev_id;
1891 unsigned short dev_port;
1892 spinlock_t addr_list_lock;
1893 unsigned char name_assign_type;
1895 struct netdev_hw_addr_list uc;
1896 struct netdev_hw_addr_list mc;
1897 struct netdev_hw_addr_list dev_addrs;
1900 struct kset *queues_kset;
1902 unsigned int promiscuity;
1903 unsigned int allmulti;
1906 /* Protocol-specific pointers */
1908 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1909 struct vlan_info __rcu *vlan_info;
1911 #if IS_ENABLED(CONFIG_NET_DSA)
1912 struct dsa_port *dsa_ptr;
1914 #if IS_ENABLED(CONFIG_TIPC)
1915 struct tipc_bearer __rcu *tipc_ptr;
1917 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1920 struct in_device __rcu *ip_ptr;
1921 #if IS_ENABLED(CONFIG_DECNET)
1922 struct dn_dev __rcu *dn_ptr;
1924 struct inet6_dev __rcu *ip6_ptr;
1925 #if IS_ENABLED(CONFIG_AX25)
1928 struct wireless_dev *ieee80211_ptr;
1929 struct wpan_dev *ieee802154_ptr;
1930 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1931 struct mpls_dev __rcu *mpls_ptr;
1935 * Cache lines mostly used on receive path (including eth_type_trans())
1937 /* Interface address info used in eth_type_trans() */
1938 unsigned char *dev_addr;
1940 struct netdev_rx_queue *_rx;
1941 unsigned int num_rx_queues;
1942 unsigned int real_num_rx_queues;
1944 struct bpf_prog __rcu *xdp_prog;
1945 unsigned long gro_flush_timeout;
1946 rx_handler_func_t __rcu *rx_handler;
1947 void __rcu *rx_handler_data;
1949 #ifdef CONFIG_NET_CLS_ACT
1950 struct mini_Qdisc __rcu *miniq_ingress;
1952 struct netdev_queue __rcu *ingress_queue;
1953 #ifdef CONFIG_NETFILTER_INGRESS
1954 struct nf_hook_entries __rcu *nf_hooks_ingress;
1957 unsigned char broadcast[MAX_ADDR_LEN];
1958 #ifdef CONFIG_RFS_ACCEL
1959 struct cpu_rmap *rx_cpu_rmap;
1961 struct hlist_node index_hlist;
1964 * Cache lines mostly used on transmit path
1966 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1967 unsigned int num_tx_queues;
1968 unsigned int real_num_tx_queues;
1969 struct Qdisc *qdisc;
1970 #ifdef CONFIG_NET_SCHED
1971 DECLARE_HASHTABLE (qdisc_hash, 4);
1973 unsigned int tx_queue_len;
1974 spinlock_t tx_global_lock;
1978 struct xps_dev_maps __rcu *xps_cpus_map;
1979 struct xps_dev_maps __rcu *xps_rxqs_map;
1981 #ifdef CONFIG_NET_CLS_ACT
1982 struct mini_Qdisc __rcu *miniq_egress;
1985 /* These may be needed for future network-power-down code. */
1986 struct timer_list watchdog_timer;
1988 int __percpu *pcpu_refcnt;
1989 struct list_head todo_list;
1991 struct list_head link_watch_list;
1993 enum { NETREG_UNINITIALIZED=0,
1994 NETREG_REGISTERED, /* completed register_netdevice */
1995 NETREG_UNREGISTERING, /* called unregister_netdevice */
1996 NETREG_UNREGISTERED, /* completed unregister todo */
1997 NETREG_RELEASED, /* called free_netdev */
1998 NETREG_DUMMY, /* dummy device for NAPI poll */
2004 RTNL_LINK_INITIALIZED,
2005 RTNL_LINK_INITIALIZING,
2006 } rtnl_link_state:16;
2008 bool needs_free_netdev;
2009 void (*priv_destructor)(struct net_device *dev);
2011 #ifdef CONFIG_NETPOLL
2012 struct netpoll_info __rcu *npinfo;
2015 possible_net_t nd_net;
2017 /* mid-layer private */
2020 struct pcpu_lstats __percpu *lstats;
2021 struct pcpu_sw_netstats __percpu *tstats;
2022 struct pcpu_dstats __percpu *dstats;
2025 #if IS_ENABLED(CONFIG_GARP)
2026 struct garp_port __rcu *garp_port;
2028 #if IS_ENABLED(CONFIG_MRP)
2029 struct mrp_port __rcu *mrp_port;
2033 const struct attribute_group *sysfs_groups[4];
2034 const struct attribute_group *sysfs_rx_queue_group;
2036 const struct rtnl_link_ops *rtnl_link_ops;
2038 /* for setting kernel sock attribute on TCP connection setup */
2039 #define GSO_MAX_SIZE 65536
2040 unsigned int gso_max_size;
2041 #define GSO_MAX_SEGS 65535
2045 const struct dcbnl_rtnl_ops *dcbnl_ops;
2048 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2049 u8 prio_tc_map[TC_BITMASK + 1];
2051 #if IS_ENABLED(CONFIG_FCOE)
2052 unsigned int fcoe_ddp_xid;
2054 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2055 struct netprio_map __rcu *priomap;
2057 struct phy_device *phydev;
2058 struct sfp_bus *sfp_bus;
2059 struct lock_class_key *qdisc_tx_busylock;
2060 struct lock_class_key *qdisc_running_key;
2062 unsigned wol_enabled:1;
2064 #define to_net_dev(d) container_of(d, struct net_device, dev)
2066 static inline bool netif_elide_gro(const struct net_device *dev)
2068 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2073 #define NETDEV_ALIGN 32
2076 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2078 return dev->prio_tc_map[prio & TC_BITMASK];
2082 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2084 if (tc >= dev->num_tc)
2087 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2091 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2092 void netdev_reset_tc(struct net_device *dev);
2093 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2094 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2097 int netdev_get_num_tc(struct net_device *dev)
2102 void netdev_unbind_sb_channel(struct net_device *dev,
2103 struct net_device *sb_dev);
2104 int netdev_bind_sb_channel_queue(struct net_device *dev,
2105 struct net_device *sb_dev,
2106 u8 tc, u16 count, u16 offset);
2107 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2108 static inline int netdev_get_sb_channel(struct net_device *dev)
2110 return max_t(int, -dev->num_tc, 0);
2114 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2117 return &dev->_tx[index];
2120 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2121 const struct sk_buff *skb)
2123 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2126 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2127 void (*f)(struct net_device *,
2128 struct netdev_queue *,
2134 for (i = 0; i < dev->num_tx_queues; i++)
2135 f(dev, &dev->_tx[i], arg);
2138 #define netdev_lockdep_set_classes(dev) \
2140 static struct lock_class_key qdisc_tx_busylock_key; \
2141 static struct lock_class_key qdisc_running_key; \
2142 static struct lock_class_key qdisc_xmit_lock_key; \
2143 static struct lock_class_key dev_addr_list_lock_key; \
2146 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2147 (dev)->qdisc_running_key = &qdisc_running_key; \
2148 lockdep_set_class(&(dev)->addr_list_lock, \
2149 &dev_addr_list_lock_key); \
2150 for (i = 0; i < (dev)->num_tx_queues; i++) \
2151 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2152 &qdisc_xmit_lock_key); \
2155 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2156 struct net_device *sb_dev);
2157 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2158 struct sk_buff *skb,
2159 struct net_device *sb_dev);
2161 /* returns the headroom that the master device needs to take in account
2162 * when forwarding to this dev
2164 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2166 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2169 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2171 if (dev->netdev_ops->ndo_set_rx_headroom)
2172 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2175 /* set the device rx headroom to the dev's default */
2176 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2178 netdev_set_rx_headroom(dev, -1);
2182 * Net namespace inlines
2185 struct net *dev_net(const struct net_device *dev)
2187 return read_pnet(&dev->nd_net);
2191 void dev_net_set(struct net_device *dev, struct net *net)
2193 write_pnet(&dev->nd_net, net);
2197 * netdev_priv - access network device private data
2198 * @dev: network device
2200 * Get network device private data
2202 static inline void *netdev_priv(const struct net_device *dev)
2204 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2207 /* Set the sysfs physical device reference for the network logical device
2208 * if set prior to registration will cause a symlink during initialization.
2210 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2212 /* Set the sysfs device type for the network logical device to allow
2213 * fine-grained identification of different network device types. For
2214 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2216 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2218 /* Default NAPI poll() weight
2219 * Device drivers are strongly advised to not use bigger value
2221 #define NAPI_POLL_WEIGHT 64
2224 * netif_napi_add - initialize a NAPI context
2225 * @dev: network device
2226 * @napi: NAPI context
2227 * @poll: polling function
2228 * @weight: default weight
2230 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2231 * *any* of the other NAPI-related functions.
2233 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2234 int (*poll)(struct napi_struct *, int), int weight);
2237 * netif_tx_napi_add - initialize a NAPI context
2238 * @dev: network device
2239 * @napi: NAPI context
2240 * @poll: polling function
2241 * @weight: default weight
2243 * This variant of netif_napi_add() should be used from drivers using NAPI
2244 * to exclusively poll a TX queue.
2245 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2247 static inline void netif_tx_napi_add(struct net_device *dev,
2248 struct napi_struct *napi,
2249 int (*poll)(struct napi_struct *, int),
2252 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2253 netif_napi_add(dev, napi, poll, weight);
2257 * netif_napi_del - remove a NAPI context
2258 * @napi: NAPI context
2260 * netif_napi_del() removes a NAPI context from the network device NAPI list
2262 void netif_napi_del(struct napi_struct *napi);
2264 struct napi_gro_cb {
2265 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2268 /* Length of frag0. */
2269 unsigned int frag0_len;
2271 /* This indicates where we are processing relative to skb->data. */
2274 /* This is non-zero if the packet cannot be merged with the new skb. */
2277 /* Save the IP ID here and check when we get to the transport layer */
2280 /* Number of segments aggregated. */
2283 /* Start offset for remote checksum offload */
2284 u16 gro_remcsum_start;
2286 /* jiffies when first packet was created/queued */
2289 /* Used in ipv6_gro_receive() and foo-over-udp */
2292 /* This is non-zero if the packet may be of the same flow. */
2295 /* Used in tunnel GRO receive */
2298 /* GRO checksum is valid */
2301 /* Number of checksums via CHECKSUM_UNNECESSARY */
2306 #define NAPI_GRO_FREE 1
2307 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2309 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2312 /* Used in GRE, set in fou/gue_gro_receive */
2315 /* Used to determine if flush_id can be ignored */
2318 /* Number of gro_receive callbacks this packet already went through */
2319 u8 recursion_counter:4;
2323 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2326 /* used in skb_gro_receive() slow path */
2327 struct sk_buff *last;
2330 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2332 #define GRO_RECURSION_LIMIT 15
2333 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2335 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2338 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2339 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2340 struct list_head *head,
2341 struct sk_buff *skb)
2343 if (unlikely(gro_recursion_inc_test(skb))) {
2344 NAPI_GRO_CB(skb)->flush |= 1;
2348 return cb(head, skb);
2351 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2353 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2355 struct list_head *head,
2356 struct sk_buff *skb)
2358 if (unlikely(gro_recursion_inc_test(skb))) {
2359 NAPI_GRO_CB(skb)->flush |= 1;
2363 return cb(sk, head, skb);
2366 struct packet_type {
2367 __be16 type; /* This is really htons(ether_type). */
2368 bool ignore_outgoing;
2369 struct net_device *dev; /* NULL is wildcarded here */
2370 int (*func) (struct sk_buff *,
2371 struct net_device *,
2372 struct packet_type *,
2373 struct net_device *);
2374 void (*list_func) (struct list_head *,
2375 struct packet_type *,
2376 struct net_device *);
2377 bool (*id_match)(struct packet_type *ptype,
2379 void *af_packet_priv;
2380 struct list_head list;
2383 struct offload_callbacks {
2384 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2385 netdev_features_t features);
2386 struct sk_buff *(*gro_receive)(struct list_head *head,
2387 struct sk_buff *skb);
2388 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2391 struct packet_offload {
2392 __be16 type; /* This is really htons(ether_type). */
2394 struct offload_callbacks callbacks;
2395 struct list_head list;
2398 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2399 struct pcpu_sw_netstats {
2404 struct u64_stats_sync syncp;
2405 } __aligned(4 * sizeof(u64));
2407 struct pcpu_lstats {
2410 struct u64_stats_sync syncp;
2411 } __aligned(2 * sizeof(u64));
2413 #define __netdev_alloc_pcpu_stats(type, gfp) \
2415 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2418 for_each_possible_cpu(__cpu) { \
2419 typeof(type) *stat; \
2420 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2421 u64_stats_init(&stat->syncp); \
2427 #define netdev_alloc_pcpu_stats(type) \
2428 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2430 enum netdev_lag_tx_type {
2431 NETDEV_LAG_TX_TYPE_UNKNOWN,
2432 NETDEV_LAG_TX_TYPE_RANDOM,
2433 NETDEV_LAG_TX_TYPE_BROADCAST,
2434 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2435 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2436 NETDEV_LAG_TX_TYPE_HASH,
2439 enum netdev_lag_hash {
2440 NETDEV_LAG_HASH_NONE,
2442 NETDEV_LAG_HASH_L34,
2443 NETDEV_LAG_HASH_L23,
2444 NETDEV_LAG_HASH_E23,
2445 NETDEV_LAG_HASH_E34,
2446 NETDEV_LAG_HASH_UNKNOWN,
2449 struct netdev_lag_upper_info {
2450 enum netdev_lag_tx_type tx_type;
2451 enum netdev_lag_hash hash_type;
2454 struct netdev_lag_lower_state_info {
2459 #include <linux/notifier.h>
2461 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2462 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2466 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2468 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2469 detected a hardware crash and restarted
2470 - we can use this eg to kick tcp sessions
2472 NETDEV_CHANGE, /* Notify device state change */
2475 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2476 NETDEV_CHANGEADDR, /* notify after the address change */
2477 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2481 NETDEV_BONDING_FAILOVER,
2483 NETDEV_PRE_TYPE_CHANGE,
2484 NETDEV_POST_TYPE_CHANGE,
2487 NETDEV_NOTIFY_PEERS,
2491 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2492 NETDEV_CHANGEINFODATA,
2493 NETDEV_BONDING_INFO,
2494 NETDEV_PRECHANGEUPPER,
2495 NETDEV_CHANGELOWERSTATE,
2496 NETDEV_UDP_TUNNEL_PUSH_INFO,
2497 NETDEV_UDP_TUNNEL_DROP_INFO,
2498 NETDEV_CHANGE_TX_QUEUE_LEN,
2499 NETDEV_CVLAN_FILTER_PUSH_INFO,
2500 NETDEV_CVLAN_FILTER_DROP_INFO,
2501 NETDEV_SVLAN_FILTER_PUSH_INFO,
2502 NETDEV_SVLAN_FILTER_DROP_INFO,
2504 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2506 int register_netdevice_notifier(struct notifier_block *nb);
2507 int unregister_netdevice_notifier(struct notifier_block *nb);
2509 struct netdev_notifier_info {
2510 struct net_device *dev;
2511 struct netlink_ext_ack *extack;
2514 struct netdev_notifier_info_ext {
2515 struct netdev_notifier_info info; /* must be first */
2521 struct netdev_notifier_change_info {
2522 struct netdev_notifier_info info; /* must be first */
2523 unsigned int flags_changed;
2526 struct netdev_notifier_changeupper_info {
2527 struct netdev_notifier_info info; /* must be first */
2528 struct net_device *upper_dev; /* new upper dev */
2529 bool master; /* is upper dev master */
2530 bool linking; /* is the notification for link or unlink */
2531 void *upper_info; /* upper dev info */
2534 struct netdev_notifier_changelowerstate_info {
2535 struct netdev_notifier_info info; /* must be first */
2536 void *lower_state_info; /* is lower dev state */
2539 struct netdev_notifier_pre_changeaddr_info {
2540 struct netdev_notifier_info info; /* must be first */
2541 const unsigned char *dev_addr;
2544 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2545 struct net_device *dev)
2548 info->extack = NULL;
2551 static inline struct net_device *
2552 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2557 static inline struct netlink_ext_ack *
2558 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2560 return info->extack;
2563 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2566 extern rwlock_t dev_base_lock; /* Device list lock */
2568 #define for_each_netdev(net, d) \
2569 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2570 #define for_each_netdev_reverse(net, d) \
2571 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2572 #define for_each_netdev_rcu(net, d) \
2573 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2574 #define for_each_netdev_safe(net, d, n) \
2575 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2576 #define for_each_netdev_continue(net, d) \
2577 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2578 #define for_each_netdev_continue_rcu(net, d) \
2579 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2580 #define for_each_netdev_in_bond_rcu(bond, slave) \
2581 for_each_netdev_rcu(&init_net, slave) \
2582 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2583 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2585 static inline struct net_device *next_net_device(struct net_device *dev)
2587 struct list_head *lh;
2591 lh = dev->dev_list.next;
2592 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2595 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2597 struct list_head *lh;
2601 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2602 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2605 static inline struct net_device *first_net_device(struct net *net)
2607 return list_empty(&net->dev_base_head) ? NULL :
2608 net_device_entry(net->dev_base_head.next);
2611 static inline struct net_device *first_net_device_rcu(struct net *net)
2613 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2615 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2618 int netdev_boot_setup_check(struct net_device *dev);
2619 unsigned long netdev_boot_base(const char *prefix, int unit);
2620 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2621 const char *hwaddr);
2622 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2623 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2624 void dev_add_pack(struct packet_type *pt);
2625 void dev_remove_pack(struct packet_type *pt);
2626 void __dev_remove_pack(struct packet_type *pt);
2627 void dev_add_offload(struct packet_offload *po);
2628 void dev_remove_offload(struct packet_offload *po);
2630 int dev_get_iflink(const struct net_device *dev);
2631 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2632 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2633 unsigned short mask);
2634 struct net_device *dev_get_by_name(struct net *net, const char *name);
2635 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2636 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2637 int dev_alloc_name(struct net_device *dev, const char *name);
2638 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2639 void dev_close(struct net_device *dev);
2640 void dev_close_many(struct list_head *head, bool unlink);
2641 void dev_disable_lro(struct net_device *dev);
2642 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2643 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2644 struct net_device *sb_dev,
2645 select_queue_fallback_t fallback);
2646 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2647 struct net_device *sb_dev,
2648 select_queue_fallback_t fallback);
2649 int dev_queue_xmit(struct sk_buff *skb);
2650 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2651 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2652 int register_netdevice(struct net_device *dev);
2653 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2654 void unregister_netdevice_many(struct list_head *head);
2655 static inline void unregister_netdevice(struct net_device *dev)
2657 unregister_netdevice_queue(dev, NULL);
2660 int netdev_refcnt_read(const struct net_device *dev);
2661 void free_netdev(struct net_device *dev);
2662 void netdev_freemem(struct net_device *dev);
2663 void synchronize_net(void);
2664 int init_dummy_netdev(struct net_device *dev);
2666 DECLARE_PER_CPU(int, xmit_recursion);
2667 #define XMIT_RECURSION_LIMIT 10
2669 static inline int dev_recursion_level(void)
2671 return this_cpu_read(xmit_recursion);
2674 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2675 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2676 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2677 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2678 int netdev_get_name(struct net *net, char *name, int ifindex);
2679 int dev_restart(struct net_device *dev);
2680 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2682 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2684 return NAPI_GRO_CB(skb)->data_offset;
2687 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2689 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2692 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2694 NAPI_GRO_CB(skb)->data_offset += len;
2697 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2698 unsigned int offset)
2700 return NAPI_GRO_CB(skb)->frag0 + offset;
2703 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2705 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2708 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2710 NAPI_GRO_CB(skb)->frag0 = NULL;
2711 NAPI_GRO_CB(skb)->frag0_len = 0;
2714 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2715 unsigned int offset)
2717 if (!pskb_may_pull(skb, hlen))
2720 skb_gro_frag0_invalidate(skb);
2721 return skb->data + offset;
2724 static inline void *skb_gro_network_header(struct sk_buff *skb)
2726 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2727 skb_network_offset(skb);
2730 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2731 const void *start, unsigned int len)
2733 if (NAPI_GRO_CB(skb)->csum_valid)
2734 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2735 csum_partial(start, len, 0));
2738 /* GRO checksum functions. These are logical equivalents of the normal
2739 * checksum functions (in skbuff.h) except that they operate on the GRO
2740 * offsets and fields in sk_buff.
2743 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2745 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2747 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2750 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2754 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2755 skb_checksum_start_offset(skb) <
2756 skb_gro_offset(skb)) &&
2757 !skb_at_gro_remcsum_start(skb) &&
2758 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2759 (!zero_okay || check));
2762 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2765 if (NAPI_GRO_CB(skb)->csum_valid &&
2766 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2769 NAPI_GRO_CB(skb)->csum = psum;
2771 return __skb_gro_checksum_complete(skb);
2774 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2776 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2777 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2778 NAPI_GRO_CB(skb)->csum_cnt--;
2780 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2781 * verified a new top level checksum or an encapsulated one
2782 * during GRO. This saves work if we fallback to normal path.
2784 __skb_incr_checksum_unnecessary(skb);
2788 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2791 __sum16 __ret = 0; \
2792 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2793 __ret = __skb_gro_checksum_validate_complete(skb, \
2794 compute_pseudo(skb, proto)); \
2796 skb_gro_incr_csum_unnecessary(skb); \
2800 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2801 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2803 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2805 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2807 #define skb_gro_checksum_simple_validate(skb) \
2808 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2810 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2812 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2813 !NAPI_GRO_CB(skb)->csum_valid);
2816 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2817 __sum16 check, __wsum pseudo)
2819 NAPI_GRO_CB(skb)->csum = ~pseudo;
2820 NAPI_GRO_CB(skb)->csum_valid = 1;
2823 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2825 if (__skb_gro_checksum_convert_check(skb)) \
2826 __skb_gro_checksum_convert(skb, check, \
2827 compute_pseudo(skb, proto)); \
2830 struct gro_remcsum {
2835 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2841 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2842 unsigned int off, size_t hdrlen,
2843 int start, int offset,
2844 struct gro_remcsum *grc,
2848 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2850 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2853 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2857 ptr = skb_gro_header_fast(skb, off);
2858 if (skb_gro_header_hard(skb, off + plen)) {
2859 ptr = skb_gro_header_slow(skb, off + plen, off);
2864 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2867 /* Adjust skb->csum since we changed the packet */
2868 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2870 grc->offset = off + hdrlen + offset;
2876 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2877 struct gro_remcsum *grc)
2880 size_t plen = grc->offset + sizeof(u16);
2885 ptr = skb_gro_header_fast(skb, grc->offset);
2886 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2887 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2892 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2895 #ifdef CONFIG_XFRM_OFFLOAD
2896 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2898 if (PTR_ERR(pp) != -EINPROGRESS)
2899 NAPI_GRO_CB(skb)->flush |= flush;
2901 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2904 struct gro_remcsum *grc)
2906 if (PTR_ERR(pp) != -EINPROGRESS) {
2907 NAPI_GRO_CB(skb)->flush |= flush;
2908 skb_gro_remcsum_cleanup(skb, grc);
2909 skb->remcsum_offload = 0;
2913 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2915 NAPI_GRO_CB(skb)->flush |= flush;
2917 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2920 struct gro_remcsum *grc)
2922 NAPI_GRO_CB(skb)->flush |= flush;
2923 skb_gro_remcsum_cleanup(skb, grc);
2924 skb->remcsum_offload = 0;
2928 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2929 unsigned short type,
2930 const void *daddr, const void *saddr,
2933 if (!dev->header_ops || !dev->header_ops->create)
2936 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2939 static inline int dev_parse_header(const struct sk_buff *skb,
2940 unsigned char *haddr)
2942 const struct net_device *dev = skb->dev;
2944 if (!dev->header_ops || !dev->header_ops->parse)
2946 return dev->header_ops->parse(skb, haddr);
2949 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2951 const struct net_device *dev = skb->dev;
2953 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2955 return dev->header_ops->parse_protocol(skb);
2958 /* ll_header must have at least hard_header_len allocated */
2959 static inline bool dev_validate_header(const struct net_device *dev,
2960 char *ll_header, int len)
2962 if (likely(len >= dev->hard_header_len))
2964 if (len < dev->min_header_len)
2967 if (capable(CAP_SYS_RAWIO)) {
2968 memset(ll_header + len, 0, dev->hard_header_len - len);
2972 if (dev->header_ops && dev->header_ops->validate)
2973 return dev->header_ops->validate(ll_header, len);
2978 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2980 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2981 static inline int unregister_gifconf(unsigned int family)
2983 return register_gifconf(family, NULL);
2986 #ifdef CONFIG_NET_FLOW_LIMIT
2987 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2988 struct sd_flow_limit {
2990 unsigned int num_buckets;
2991 unsigned int history_head;
2992 u16 history[FLOW_LIMIT_HISTORY];
2996 extern int netdev_flow_limit_table_len;
2997 #endif /* CONFIG_NET_FLOW_LIMIT */
3000 * Incoming packets are placed on per-CPU queues
3002 struct softnet_data {
3003 struct list_head poll_list;
3004 struct sk_buff_head process_queue;
3007 unsigned int processed;
3008 unsigned int time_squeeze;
3009 unsigned int received_rps;
3011 struct softnet_data *rps_ipi_list;
3013 #ifdef CONFIG_NET_FLOW_LIMIT
3014 struct sd_flow_limit __rcu *flow_limit;
3016 struct Qdisc *output_queue;
3017 struct Qdisc **output_queue_tailp;
3018 struct sk_buff *completion_queue;
3019 #ifdef CONFIG_XFRM_OFFLOAD
3020 struct sk_buff_head xfrm_backlog;
3023 /* input_queue_head should be written by cpu owning this struct,
3024 * and only read by other cpus. Worth using a cache line.
3026 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3028 /* Elements below can be accessed between CPUs for RPS/RFS */
3029 call_single_data_t csd ____cacheline_aligned_in_smp;
3030 struct softnet_data *rps_ipi_next;
3032 unsigned int input_queue_tail;
3034 unsigned int dropped;
3035 struct sk_buff_head input_pkt_queue;
3036 struct napi_struct backlog;
3040 static inline void input_queue_head_incr(struct softnet_data *sd)
3043 sd->input_queue_head++;
3047 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3048 unsigned int *qtail)
3051 *qtail = ++sd->input_queue_tail;
3055 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3057 void __netif_schedule(struct Qdisc *q);
3058 void netif_schedule_queue(struct netdev_queue *txq);
3060 static inline void netif_tx_schedule_all(struct net_device *dev)
3064 for (i = 0; i < dev->num_tx_queues; i++)
3065 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3068 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3070 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3074 * netif_start_queue - allow transmit
3075 * @dev: network device
3077 * Allow upper layers to call the device hard_start_xmit routine.
3079 static inline void netif_start_queue(struct net_device *dev)
3081 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3084 static inline void netif_tx_start_all_queues(struct net_device *dev)
3088 for (i = 0; i < dev->num_tx_queues; i++) {
3089 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3090 netif_tx_start_queue(txq);
3094 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3097 * netif_wake_queue - restart transmit
3098 * @dev: network device
3100 * Allow upper layers to call the device hard_start_xmit routine.
3101 * Used for flow control when transmit resources are available.
3103 static inline void netif_wake_queue(struct net_device *dev)
3105 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3108 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3112 for (i = 0; i < dev->num_tx_queues; i++) {
3113 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3114 netif_tx_wake_queue(txq);
3118 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3120 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3124 * netif_stop_queue - stop transmitted packets
3125 * @dev: network device
3127 * Stop upper layers calling the device hard_start_xmit routine.
3128 * Used for flow control when transmit resources are unavailable.
3130 static inline void netif_stop_queue(struct net_device *dev)
3132 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3135 void netif_tx_stop_all_queues(struct net_device *dev);
3137 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3139 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3143 * netif_queue_stopped - test if transmit queue is flowblocked
3144 * @dev: network device
3146 * Test if transmit queue on device is currently unable to send.
3148 static inline bool netif_queue_stopped(const struct net_device *dev)
3150 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3153 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3155 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3159 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3161 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3165 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3167 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3171 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3172 * @dev_queue: pointer to transmit queue
3174 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3175 * to give appropriate hint to the CPU.
3177 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3180 prefetchw(&dev_queue->dql.num_queued);
3185 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3186 * @dev_queue: pointer to transmit queue
3188 * BQL enabled drivers might use this helper in their TX completion path,
3189 * to give appropriate hint to the CPU.
3191 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3194 prefetchw(&dev_queue->dql.limit);
3198 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3202 dql_queued(&dev_queue->dql, bytes);
3204 if (likely(dql_avail(&dev_queue->dql) >= 0))
3207 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3210 * The XOFF flag must be set before checking the dql_avail below,
3211 * because in netdev_tx_completed_queue we update the dql_completed
3212 * before checking the XOFF flag.
3216 /* check again in case another CPU has just made room avail */
3217 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3218 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3222 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3223 * that they should not test BQL status themselves.
3224 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3226 * Returns true if the doorbell must be used to kick the NIC.
3228 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3234 dql_queued(&dev_queue->dql, bytes);
3236 return netif_tx_queue_stopped(dev_queue);
3238 netdev_tx_sent_queue(dev_queue, bytes);
3243 * netdev_sent_queue - report the number of bytes queued to hardware
3244 * @dev: network device
3245 * @bytes: number of bytes queued to the hardware device queue
3247 * Report the number of bytes queued for sending/completion to the network
3248 * device hardware queue. @bytes should be a good approximation and should
3249 * exactly match netdev_completed_queue() @bytes
3251 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3253 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3256 static inline bool __netdev_sent_queue(struct net_device *dev,
3260 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3264 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3265 unsigned int pkts, unsigned int bytes)
3268 if (unlikely(!bytes))
3271 dql_completed(&dev_queue->dql, bytes);
3274 * Without the memory barrier there is a small possiblity that
3275 * netdev_tx_sent_queue will miss the update and cause the queue to
3276 * be stopped forever
3280 if (dql_avail(&dev_queue->dql) < 0)
3283 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3284 netif_schedule_queue(dev_queue);
3289 * netdev_completed_queue - report bytes and packets completed by device
3290 * @dev: network device
3291 * @pkts: actual number of packets sent over the medium
3292 * @bytes: actual number of bytes sent over the medium
3294 * Report the number of bytes and packets transmitted by the network device
3295 * hardware queue over the physical medium, @bytes must exactly match the
3296 * @bytes amount passed to netdev_sent_queue()
3298 static inline void netdev_completed_queue(struct net_device *dev,
3299 unsigned int pkts, unsigned int bytes)
3301 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3304 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3307 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3313 * netdev_reset_queue - reset the packets and bytes count of a network device
3314 * @dev_queue: network device
3316 * Reset the bytes and packet count of a network device and clear the
3317 * software flow control OFF bit for this network device
3319 static inline void netdev_reset_queue(struct net_device *dev_queue)
3321 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3325 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3326 * @dev: network device
3327 * @queue_index: given tx queue index
3329 * Returns 0 if given tx queue index >= number of device tx queues,
3330 * otherwise returns the originally passed tx queue index.
3332 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3334 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3335 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3336 dev->name, queue_index,
3337 dev->real_num_tx_queues);
3345 * netif_running - test if up
3346 * @dev: network device
3348 * Test if the device has been brought up.
3350 static inline bool netif_running(const struct net_device *dev)
3352 return test_bit(__LINK_STATE_START, &dev->state);
3356 * Routines to manage the subqueues on a device. We only need start,
3357 * stop, and a check if it's stopped. All other device management is
3358 * done at the overall netdevice level.
3359 * Also test the device if we're multiqueue.
3363 * netif_start_subqueue - allow sending packets on subqueue
3364 * @dev: network device
3365 * @queue_index: sub queue index
3367 * Start individual transmit queue of a device with multiple transmit queues.
3369 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3371 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3373 netif_tx_start_queue(txq);
3377 * netif_stop_subqueue - stop sending packets on subqueue
3378 * @dev: network device
3379 * @queue_index: sub queue index
3381 * Stop individual transmit queue of a device with multiple transmit queues.
3383 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3385 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3386 netif_tx_stop_queue(txq);
3390 * netif_subqueue_stopped - test status of subqueue
3391 * @dev: network device
3392 * @queue_index: sub queue index
3394 * Check individual transmit queue of a device with multiple transmit queues.
3396 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3399 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3401 return netif_tx_queue_stopped(txq);
3404 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3405 struct sk_buff *skb)
3407 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3411 * netif_wake_subqueue - allow sending packets on subqueue
3412 * @dev: network device
3413 * @queue_index: sub queue index
3415 * Resume individual transmit queue of a device with multiple transmit queues.
3417 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3419 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3421 netif_tx_wake_queue(txq);
3425 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3427 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3428 u16 index, bool is_rxqs_map);
3431 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3432 * @j: CPU/Rx queue index
3433 * @mask: bitmask of all cpus/rx queues
3434 * @nr_bits: number of bits in the bitmask
3436 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3438 static inline bool netif_attr_test_mask(unsigned long j,
3439 const unsigned long *mask,
3440 unsigned int nr_bits)
3442 cpu_max_bits_warn(j, nr_bits);
3443 return test_bit(j, mask);
3447 * netif_attr_test_online - Test for online CPU/Rx queue
3448 * @j: CPU/Rx queue index
3449 * @online_mask: bitmask for CPUs/Rx queues that are online
3450 * @nr_bits: number of bits in the bitmask
3452 * Returns true if a CPU/Rx queue is online.
3454 static inline bool netif_attr_test_online(unsigned long j,
3455 const unsigned long *online_mask,
3456 unsigned int nr_bits)
3458 cpu_max_bits_warn(j, nr_bits);
3461 return test_bit(j, online_mask);
3463 return (j < nr_bits);
3467 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3468 * @n: CPU/Rx queue index
3469 * @srcp: the cpumask/Rx queue mask pointer
3470 * @nr_bits: number of bits in the bitmask
3472 * Returns >= nr_bits if no further CPUs/Rx queues set.
3474 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3475 unsigned int nr_bits)
3477 /* -1 is a legal arg here. */
3479 cpu_max_bits_warn(n, nr_bits);
3482 return find_next_bit(srcp, nr_bits, n + 1);
3488 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3489 * @n: CPU/Rx queue index
3490 * @src1p: the first CPUs/Rx queues mask pointer
3491 * @src2p: the second CPUs/Rx queues mask pointer
3492 * @nr_bits: number of bits in the bitmask
3494 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3496 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3497 const unsigned long *src2p,
3498 unsigned int nr_bits)
3500 /* -1 is a legal arg here. */
3502 cpu_max_bits_warn(n, nr_bits);
3505 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3507 return find_next_bit(src1p, nr_bits, n + 1);
3509 return find_next_bit(src2p, nr_bits, n + 1);
3514 static inline int netif_set_xps_queue(struct net_device *dev,
3515 const struct cpumask *mask,
3521 static inline int __netif_set_xps_queue(struct net_device *dev,
3522 const unsigned long *mask,
3523 u16 index, bool is_rxqs_map)
3530 * netif_is_multiqueue - test if device has multiple transmit queues
3531 * @dev: network device
3533 * Check if device has multiple transmit queues
3535 static inline bool netif_is_multiqueue(const struct net_device *dev)
3537 return dev->num_tx_queues > 1;
3540 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3543 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3545 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3548 dev->real_num_rx_queues = rxqs;
3553 static inline struct netdev_rx_queue *
3554 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3556 return dev->_rx + rxq;
3560 static inline unsigned int get_netdev_rx_queue_index(
3561 struct netdev_rx_queue *queue)
3563 struct net_device *dev = queue->dev;
3564 int index = queue - dev->_rx;
3566 BUG_ON(index >= dev->num_rx_queues);
3571 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3572 int netif_get_num_default_rss_queues(void);
3574 enum skb_free_reason {
3575 SKB_REASON_CONSUMED,
3579 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3580 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3583 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3584 * interrupt context or with hardware interrupts being disabled.
3585 * (in_irq() || irqs_disabled())
3587 * We provide four helpers that can be used in following contexts :
3589 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3590 * replacing kfree_skb(skb)
3592 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3593 * Typically used in place of consume_skb(skb) in TX completion path
3595 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3596 * replacing kfree_skb(skb)
3598 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3599 * and consumed a packet. Used in place of consume_skb(skb)
3601 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3603 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3606 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3608 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3611 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3613 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3616 static inline void dev_consume_skb_any(struct sk_buff *skb)
3618 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3621 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3622 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3623 int netif_rx(struct sk_buff *skb);
3624 int netif_rx_ni(struct sk_buff *skb);
3625 int netif_receive_skb(struct sk_buff *skb);
3626 int netif_receive_skb_core(struct sk_buff *skb);
3627 void netif_receive_skb_list(struct list_head *head);
3628 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3629 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3630 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3631 gro_result_t napi_gro_frags(struct napi_struct *napi);
3632 struct packet_offload *gro_find_receive_by_type(__be16 type);
3633 struct packet_offload *gro_find_complete_by_type(__be16 type);
3635 static inline void napi_free_frags(struct napi_struct *napi)
3637 kfree_skb(napi->skb);
3641 bool netdev_is_rx_handler_busy(struct net_device *dev);
3642 int netdev_rx_handler_register(struct net_device *dev,
3643 rx_handler_func_t *rx_handler,
3644 void *rx_handler_data);
3645 void netdev_rx_handler_unregister(struct net_device *dev);
3647 bool dev_valid_name(const char *name);
3648 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3649 bool *need_copyout);
3650 int dev_ifconf(struct net *net, struct ifconf *, int);
3651 int dev_ethtool(struct net *net, struct ifreq *);
3652 unsigned int dev_get_flags(const struct net_device *);
3653 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3654 struct netlink_ext_ack *extack);
3655 int dev_change_flags(struct net_device *dev, unsigned int flags,
3656 struct netlink_ext_ack *extack);
3657 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3658 unsigned int gchanges);
3659 int dev_change_name(struct net_device *, const char *);
3660 int dev_set_alias(struct net_device *, const char *, size_t);
3661 int dev_get_alias(const struct net_device *, char *, size_t);
3662 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3663 int __dev_set_mtu(struct net_device *, int);
3664 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3665 struct netlink_ext_ack *extack);
3666 int dev_set_mtu(struct net_device *, int);
3667 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3668 void dev_set_group(struct net_device *, int);
3669 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3670 struct netlink_ext_ack *extack);
3671 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3672 struct netlink_ext_ack *extack);
3673 int dev_change_carrier(struct net_device *, bool new_carrier);
3674 int dev_get_phys_port_id(struct net_device *dev,
3675 struct netdev_phys_item_id *ppid);
3676 int dev_get_phys_port_name(struct net_device *dev,
3677 char *name, size_t len);
3678 int dev_get_port_parent_id(struct net_device *dev,
3679 struct netdev_phys_item_id *ppid, bool recurse);
3680 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3681 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3682 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3683 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3684 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3685 struct netdev_queue *txq, int *ret);
3687 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3688 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3690 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3691 enum bpf_netdev_command cmd);
3692 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3694 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3695 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3696 bool is_skb_forwardable(const struct net_device *dev,
3697 const struct sk_buff *skb);
3699 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3700 struct sk_buff *skb)
3702 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3703 unlikely(!is_skb_forwardable(dev, skb))) {
3704 atomic_long_inc(&dev->rx_dropped);
3709 skb_scrub_packet(skb, true);
3714 bool dev_nit_active(struct net_device *dev);
3715 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3717 extern int netdev_budget;
3718 extern unsigned int netdev_budget_usecs;
3720 /* Called by rtnetlink.c:rtnl_unlock() */
3721 void netdev_run_todo(void);
3724 * dev_put - release reference to device
3725 * @dev: network device
3727 * Release reference to device to allow it to be freed.
3729 static inline void dev_put(struct net_device *dev)
3731 this_cpu_dec(*dev->pcpu_refcnt);
3735 * dev_hold - get reference to device
3736 * @dev: network device
3738 * Hold reference to device to keep it from being freed.
3740 static inline void dev_hold(struct net_device *dev)
3742 this_cpu_inc(*dev->pcpu_refcnt);
3745 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3746 * and _off may be called from IRQ context, but it is caller
3747 * who is responsible for serialization of these calls.
3749 * The name carrier is inappropriate, these functions should really be
3750 * called netif_lowerlayer_*() because they represent the state of any
3751 * kind of lower layer not just hardware media.
3754 void linkwatch_init_dev(struct net_device *dev);
3755 void linkwatch_fire_event(struct net_device *dev);
3756 void linkwatch_forget_dev(struct net_device *dev);
3759 * netif_carrier_ok - test if carrier present
3760 * @dev: network device
3762 * Check if carrier is present on device
3764 static inline bool netif_carrier_ok(const struct net_device *dev)
3766 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3769 unsigned long dev_trans_start(struct net_device *dev);
3771 void __netdev_watchdog_up(struct net_device *dev);
3773 void netif_carrier_on(struct net_device *dev);
3775 void netif_carrier_off(struct net_device *dev);
3778 * netif_dormant_on - mark device as dormant.
3779 * @dev: network device
3781 * Mark device as dormant (as per RFC2863).
3783 * The dormant state indicates that the relevant interface is not
3784 * actually in a condition to pass packets (i.e., it is not 'up') but is
3785 * in a "pending" state, waiting for some external event. For "on-
3786 * demand" interfaces, this new state identifies the situation where the
3787 * interface is waiting for events to place it in the up state.
3789 static inline void netif_dormant_on(struct net_device *dev)
3791 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3792 linkwatch_fire_event(dev);
3796 * netif_dormant_off - set device as not dormant.
3797 * @dev: network device
3799 * Device is not in dormant state.
3801 static inline void netif_dormant_off(struct net_device *dev)
3803 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3804 linkwatch_fire_event(dev);
3808 * netif_dormant - test if device is dormant
3809 * @dev: network device
3811 * Check if device is dormant.
3813 static inline bool netif_dormant(const struct net_device *dev)
3815 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3820 * netif_oper_up - test if device is operational
3821 * @dev: network device
3823 * Check if carrier is operational
3825 static inline bool netif_oper_up(const struct net_device *dev)
3827 return (dev->operstate == IF_OPER_UP ||
3828 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3832 * netif_device_present - is device available or removed
3833 * @dev: network device
3835 * Check if device has not been removed from system.
3837 static inline bool netif_device_present(struct net_device *dev)
3839 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3842 void netif_device_detach(struct net_device *dev);
3844 void netif_device_attach(struct net_device *dev);
3847 * Network interface message level settings
3851 NETIF_MSG_DRV = 0x0001,
3852 NETIF_MSG_PROBE = 0x0002,
3853 NETIF_MSG_LINK = 0x0004,
3854 NETIF_MSG_TIMER = 0x0008,
3855 NETIF_MSG_IFDOWN = 0x0010,
3856 NETIF_MSG_IFUP = 0x0020,
3857 NETIF_MSG_RX_ERR = 0x0040,
3858 NETIF_MSG_TX_ERR = 0x0080,
3859 NETIF_MSG_TX_QUEUED = 0x0100,
3860 NETIF_MSG_INTR = 0x0200,
3861 NETIF_MSG_TX_DONE = 0x0400,
3862 NETIF_MSG_RX_STATUS = 0x0800,
3863 NETIF_MSG_PKTDATA = 0x1000,
3864 NETIF_MSG_HW = 0x2000,
3865 NETIF_MSG_WOL = 0x4000,
3868 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3869 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3870 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3871 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3872 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3873 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3874 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3875 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3876 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3877 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3878 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3879 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3880 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3881 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3882 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3884 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3887 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3888 return default_msg_enable_bits;
3889 if (debug_value == 0) /* no output */
3891 /* set low N bits */
3892 return (1U << debug_value) - 1;
3895 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3897 spin_lock(&txq->_xmit_lock);
3898 txq->xmit_lock_owner = cpu;
3901 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3903 __acquire(&txq->_xmit_lock);
3907 static inline void __netif_tx_release(struct netdev_queue *txq)
3909 __release(&txq->_xmit_lock);
3912 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3914 spin_lock_bh(&txq->_xmit_lock);
3915 txq->xmit_lock_owner = smp_processor_id();
3918 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3920 bool ok = spin_trylock(&txq->_xmit_lock);
3922 txq->xmit_lock_owner = smp_processor_id();
3926 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3928 txq->xmit_lock_owner = -1;
3929 spin_unlock(&txq->_xmit_lock);
3932 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3934 txq->xmit_lock_owner = -1;
3935 spin_unlock_bh(&txq->_xmit_lock);
3938 static inline void txq_trans_update(struct netdev_queue *txq)
3940 if (txq->xmit_lock_owner != -1)
3941 txq->trans_start = jiffies;
3944 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3945 static inline void netif_trans_update(struct net_device *dev)
3947 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3949 if (txq->trans_start != jiffies)
3950 txq->trans_start = jiffies;
3954 * netif_tx_lock - grab network device transmit lock
3955 * @dev: network device
3957 * Get network device transmit lock
3959 static inline void netif_tx_lock(struct net_device *dev)
3964 spin_lock(&dev->tx_global_lock);
3965 cpu = smp_processor_id();
3966 for (i = 0; i < dev->num_tx_queues; i++) {
3967 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3969 /* We are the only thread of execution doing a
3970 * freeze, but we have to grab the _xmit_lock in
3971 * order to synchronize with threads which are in
3972 * the ->hard_start_xmit() handler and already
3973 * checked the frozen bit.
3975 __netif_tx_lock(txq, cpu);
3976 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3977 __netif_tx_unlock(txq);
3981 static inline void netif_tx_lock_bh(struct net_device *dev)
3987 static inline void netif_tx_unlock(struct net_device *dev)
3991 for (i = 0; i < dev->num_tx_queues; i++) {
3992 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3994 /* No need to grab the _xmit_lock here. If the
3995 * queue is not stopped for another reason, we
3998 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3999 netif_schedule_queue(txq);
4001 spin_unlock(&dev->tx_global_lock);
4004 static inline void netif_tx_unlock_bh(struct net_device *dev)
4006 netif_tx_unlock(dev);
4010 #define HARD_TX_LOCK(dev, txq, cpu) { \
4011 if ((dev->features & NETIF_F_LLTX) == 0) { \
4012 __netif_tx_lock(txq, cpu); \
4014 __netif_tx_acquire(txq); \
4018 #define HARD_TX_TRYLOCK(dev, txq) \
4019 (((dev->features & NETIF_F_LLTX) == 0) ? \
4020 __netif_tx_trylock(txq) : \
4021 __netif_tx_acquire(txq))
4023 #define HARD_TX_UNLOCK(dev, txq) { \
4024 if ((dev->features & NETIF_F_LLTX) == 0) { \
4025 __netif_tx_unlock(txq); \
4027 __netif_tx_release(txq); \
4031 static inline void netif_tx_disable(struct net_device *dev)
4037 cpu = smp_processor_id();
4038 for (i = 0; i < dev->num_tx_queues; i++) {
4039 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4041 __netif_tx_lock(txq, cpu);
4042 netif_tx_stop_queue(txq);
4043 __netif_tx_unlock(txq);
4048 static inline void netif_addr_lock(struct net_device *dev)
4050 spin_lock(&dev->addr_list_lock);
4053 static inline void netif_addr_lock_nested(struct net_device *dev)
4055 int subclass = SINGLE_DEPTH_NESTING;
4057 if (dev->netdev_ops->ndo_get_lock_subclass)
4058 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
4060 spin_lock_nested(&dev->addr_list_lock, subclass);
4063 static inline void netif_addr_lock_bh(struct net_device *dev)
4065 spin_lock_bh(&dev->addr_list_lock);
4068 static inline void netif_addr_unlock(struct net_device *dev)
4070 spin_unlock(&dev->addr_list_lock);
4073 static inline void netif_addr_unlock_bh(struct net_device *dev)
4075 spin_unlock_bh(&dev->addr_list_lock);
4079 * dev_addrs walker. Should be used only for read access. Call with
4080 * rcu_read_lock held.
4082 #define for_each_dev_addr(dev, ha) \
4083 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4085 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4087 void ether_setup(struct net_device *dev);
4089 /* Support for loadable net-drivers */
4090 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4091 unsigned char name_assign_type,
4092 void (*setup)(struct net_device *),
4093 unsigned int txqs, unsigned int rxqs);
4094 int dev_get_valid_name(struct net *net, struct net_device *dev,
4097 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4098 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4100 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4101 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4104 int register_netdev(struct net_device *dev);
4105 void unregister_netdev(struct net_device *dev);
4107 /* General hardware address lists handling functions */
4108 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4109 struct netdev_hw_addr_list *from_list, int addr_len);
4110 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4111 struct netdev_hw_addr_list *from_list, int addr_len);
4112 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4113 struct net_device *dev,
4114 int (*sync)(struct net_device *, const unsigned char *),
4115 int (*unsync)(struct net_device *,
4116 const unsigned char *));
4117 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4118 struct net_device *dev,
4119 int (*sync)(struct net_device *,
4120 const unsigned char *, int),
4121 int (*unsync)(struct net_device *,
4122 const unsigned char *, int));
4123 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4124 struct net_device *dev,
4125 int (*unsync)(struct net_device *,
4126 const unsigned char *, int));
4127 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4128 struct net_device *dev,
4129 int (*unsync)(struct net_device *,
4130 const unsigned char *));
4131 void __hw_addr_init(struct netdev_hw_addr_list *list);
4133 /* Functions used for device addresses handling */
4134 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4135 unsigned char addr_type);
4136 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4137 unsigned char addr_type);
4138 void dev_addr_flush(struct net_device *dev);
4139 int dev_addr_init(struct net_device *dev);
4141 /* Functions used for unicast addresses handling */
4142 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4143 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4144 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4145 int dev_uc_sync(struct net_device *to, struct net_device *from);
4146 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4147 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4148 void dev_uc_flush(struct net_device *dev);
4149 void dev_uc_init(struct net_device *dev);
4152 * __dev_uc_sync - Synchonize device's unicast list
4153 * @dev: device to sync
4154 * @sync: function to call if address should be added
4155 * @unsync: function to call if address should be removed
4157 * Add newly added addresses to the interface, and release
4158 * addresses that have been deleted.
4160 static inline int __dev_uc_sync(struct net_device *dev,
4161 int (*sync)(struct net_device *,
4162 const unsigned char *),
4163 int (*unsync)(struct net_device *,
4164 const unsigned char *))
4166 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4170 * __dev_uc_unsync - Remove synchronized addresses from device
4171 * @dev: device to sync
4172 * @unsync: function to call if address should be removed
4174 * Remove all addresses that were added to the device by dev_uc_sync().
4176 static inline void __dev_uc_unsync(struct net_device *dev,
4177 int (*unsync)(struct net_device *,
4178 const unsigned char *))
4180 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4183 /* Functions used for multicast addresses handling */
4184 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4185 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4186 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4187 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4188 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4189 int dev_mc_sync(struct net_device *to, struct net_device *from);
4190 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4191 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4192 void dev_mc_flush(struct net_device *dev);
4193 void dev_mc_init(struct net_device *dev);
4196 * __dev_mc_sync - Synchonize device's multicast list
4197 * @dev: device to sync
4198 * @sync: function to call if address should be added
4199 * @unsync: function to call if address should be removed
4201 * Add newly added addresses to the interface, and release
4202 * addresses that have been deleted.
4204 static inline int __dev_mc_sync(struct net_device *dev,
4205 int (*sync)(struct net_device *,
4206 const unsigned char *),
4207 int (*unsync)(struct net_device *,
4208 const unsigned char *))
4210 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4214 * __dev_mc_unsync - Remove synchronized addresses from device
4215 * @dev: device to sync
4216 * @unsync: function to call if address should be removed
4218 * Remove all addresses that were added to the device by dev_mc_sync().
4220 static inline void __dev_mc_unsync(struct net_device *dev,
4221 int (*unsync)(struct net_device *,
4222 const unsigned char *))
4224 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4227 /* Functions used for secondary unicast and multicast support */
4228 void dev_set_rx_mode(struct net_device *dev);
4229 void __dev_set_rx_mode(struct net_device *dev);
4230 int dev_set_promiscuity(struct net_device *dev, int inc);
4231 int dev_set_allmulti(struct net_device *dev, int inc);
4232 void netdev_state_change(struct net_device *dev);
4233 void netdev_notify_peers(struct net_device *dev);
4234 void netdev_features_change(struct net_device *dev);
4235 /* Load a device via the kmod */
4236 void dev_load(struct net *net, const char *name);
4237 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4238 struct rtnl_link_stats64 *storage);
4239 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4240 const struct net_device_stats *netdev_stats);
4242 extern int netdev_max_backlog;
4243 extern int netdev_tstamp_prequeue;
4244 extern int weight_p;
4245 extern int dev_weight_rx_bias;
4246 extern int dev_weight_tx_bias;
4247 extern int dev_rx_weight;
4248 extern int dev_tx_weight;
4250 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4251 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4252 struct list_head **iter);
4253 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4254 struct list_head **iter);
4256 /* iterate through upper list, must be called under RCU read lock */
4257 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4258 for (iter = &(dev)->adj_list.upper, \
4259 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4261 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4263 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4264 int (*fn)(struct net_device *upper_dev,
4268 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4269 struct net_device *upper_dev);
4271 bool netdev_has_any_upper_dev(struct net_device *dev);
4273 void *netdev_lower_get_next_private(struct net_device *dev,
4274 struct list_head **iter);
4275 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4276 struct list_head **iter);
4278 #define netdev_for_each_lower_private(dev, priv, iter) \
4279 for (iter = (dev)->adj_list.lower.next, \
4280 priv = netdev_lower_get_next_private(dev, &(iter)); \
4282 priv = netdev_lower_get_next_private(dev, &(iter)))
4284 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4285 for (iter = &(dev)->adj_list.lower, \
4286 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4288 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4290 void *netdev_lower_get_next(struct net_device *dev,
4291 struct list_head **iter);
4293 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4294 for (iter = (dev)->adj_list.lower.next, \
4295 ldev = netdev_lower_get_next(dev, &(iter)); \
4297 ldev = netdev_lower_get_next(dev, &(iter)))
4299 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4300 struct list_head **iter);
4301 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4302 struct list_head **iter);
4304 int netdev_walk_all_lower_dev(struct net_device *dev,
4305 int (*fn)(struct net_device *lower_dev,
4308 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4309 int (*fn)(struct net_device *lower_dev,
4313 void *netdev_adjacent_get_private(struct list_head *adj_list);
4314 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4315 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4316 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4317 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4318 struct netlink_ext_ack *extack);
4319 int netdev_master_upper_dev_link(struct net_device *dev,
4320 struct net_device *upper_dev,
4321 void *upper_priv, void *upper_info,
4322 struct netlink_ext_ack *extack);
4323 void netdev_upper_dev_unlink(struct net_device *dev,
4324 struct net_device *upper_dev);
4325 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4326 void *netdev_lower_dev_get_private(struct net_device *dev,
4327 struct net_device *lower_dev);
4328 void netdev_lower_state_changed(struct net_device *lower_dev,
4329 void *lower_state_info);
4331 /* RSS keys are 40 or 52 bytes long */
4332 #define NETDEV_RSS_KEY_LEN 52
4333 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4334 void netdev_rss_key_fill(void *buffer, size_t len);
4336 int dev_get_nest_level(struct net_device *dev);
4337 int skb_checksum_help(struct sk_buff *skb);
4338 int skb_crc32c_csum_help(struct sk_buff *skb);
4339 int skb_csum_hwoffload_help(struct sk_buff *skb,
4340 const netdev_features_t features);
4342 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4343 netdev_features_t features, bool tx_path);
4344 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4345 netdev_features_t features);
4347 struct netdev_bonding_info {
4352 struct netdev_notifier_bonding_info {
4353 struct netdev_notifier_info info; /* must be first */
4354 struct netdev_bonding_info bonding_info;
4357 void netdev_bonding_info_change(struct net_device *dev,
4358 struct netdev_bonding_info *bonding_info);
4361 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4363 return __skb_gso_segment(skb, features, true);
4365 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4367 static inline bool can_checksum_protocol(netdev_features_t features,
4370 if (protocol == htons(ETH_P_FCOE))
4371 return !!(features & NETIF_F_FCOE_CRC);
4373 /* Assume this is an IP checksum (not SCTP CRC) */
4375 if (features & NETIF_F_HW_CSUM) {
4376 /* Can checksum everything */
4381 case htons(ETH_P_IP):
4382 return !!(features & NETIF_F_IP_CSUM);
4383 case htons(ETH_P_IPV6):
4384 return !!(features & NETIF_F_IPV6_CSUM);
4391 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4393 static inline void netdev_rx_csum_fault(struct net_device *dev,
4394 struct sk_buff *skb)
4398 /* rx skb timestamps */
4399 void net_enable_timestamp(void);
4400 void net_disable_timestamp(void);
4402 #ifdef CONFIG_PROC_FS
4403 int __init dev_proc_init(void);
4405 #define dev_proc_init() 0
4408 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4409 struct sk_buff *skb, struct net_device *dev,
4412 skb->xmit_more = more ? 1 : 0;
4413 return ops->ndo_start_xmit(skb, dev);
4416 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4417 struct netdev_queue *txq, bool more)
4419 const struct net_device_ops *ops = dev->netdev_ops;
4422 rc = __netdev_start_xmit(ops, skb, dev, more);
4423 if (rc == NETDEV_TX_OK)
4424 txq_trans_update(txq);
4429 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4431 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4434 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4436 return netdev_class_create_file_ns(class_attr, NULL);
4439 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4441 netdev_class_remove_file_ns(class_attr, NULL);
4444 extern const struct kobj_ns_type_operations net_ns_type_operations;
4446 const char *netdev_drivername(const struct net_device *dev);
4448 void linkwatch_run_queue(void);
4450 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4451 netdev_features_t f2)
4453 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4454 if (f1 & NETIF_F_HW_CSUM)
4455 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4457 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4463 static inline netdev_features_t netdev_get_wanted_features(
4464 struct net_device *dev)
4466 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4468 netdev_features_t netdev_increment_features(netdev_features_t all,
4469 netdev_features_t one, netdev_features_t mask);
4471 /* Allow TSO being used on stacked device :
4472 * Performing the GSO segmentation before last device
4473 * is a performance improvement.
4475 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4476 netdev_features_t mask)
4478 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4481 int __netdev_update_features(struct net_device *dev);
4482 void netdev_update_features(struct net_device *dev);
4483 void netdev_change_features(struct net_device *dev);
4485 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4486 struct net_device *dev);
4488 netdev_features_t passthru_features_check(struct sk_buff *skb,
4489 struct net_device *dev,
4490 netdev_features_t features);
4491 netdev_features_t netif_skb_features(struct sk_buff *skb);
4493 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4495 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4497 /* check flags correspondence */
4498 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4499 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4500 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4501 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4502 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4503 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4504 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4505 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4506 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4507 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4508 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4509 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4510 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4511 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4512 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4513 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4514 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4515 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4517 return (features & feature) == feature;
4520 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4522 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4523 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4526 static inline bool netif_needs_gso(struct sk_buff *skb,
4527 netdev_features_t features)
4529 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4530 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4531 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4534 static inline void netif_set_gso_max_size(struct net_device *dev,
4537 dev->gso_max_size = size;
4540 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4541 int pulled_hlen, u16 mac_offset,
4544 skb->protocol = protocol;
4545 skb->encapsulation = 1;
4546 skb_push(skb, pulled_hlen);
4547 skb_reset_transport_header(skb);
4548 skb->mac_header = mac_offset;
4549 skb->network_header = skb->mac_header + mac_len;
4550 skb->mac_len = mac_len;
4553 static inline bool netif_is_macsec(const struct net_device *dev)
4555 return dev->priv_flags & IFF_MACSEC;
4558 static inline bool netif_is_macvlan(const struct net_device *dev)
4560 return dev->priv_flags & IFF_MACVLAN;
4563 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4565 return dev->priv_flags & IFF_MACVLAN_PORT;
4568 static inline bool netif_is_bond_master(const struct net_device *dev)
4570 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4573 static inline bool netif_is_bond_slave(const struct net_device *dev)
4575 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4578 static inline bool netif_supports_nofcs(struct net_device *dev)
4580 return dev->priv_flags & IFF_SUPP_NOFCS;
4583 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4585 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4588 static inline bool netif_is_l3_master(const struct net_device *dev)
4590 return dev->priv_flags & IFF_L3MDEV_MASTER;
4593 static inline bool netif_is_l3_slave(const struct net_device *dev)
4595 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4598 static inline bool netif_is_bridge_master(const struct net_device *dev)
4600 return dev->priv_flags & IFF_EBRIDGE;
4603 static inline bool netif_is_bridge_port(const struct net_device *dev)
4605 return dev->priv_flags & IFF_BRIDGE_PORT;
4608 static inline bool netif_is_ovs_master(const struct net_device *dev)
4610 return dev->priv_flags & IFF_OPENVSWITCH;
4613 static inline bool netif_is_ovs_port(const struct net_device *dev)
4615 return dev->priv_flags & IFF_OVS_DATAPATH;
4618 static inline bool netif_is_team_master(const struct net_device *dev)
4620 return dev->priv_flags & IFF_TEAM;
4623 static inline bool netif_is_team_port(const struct net_device *dev)
4625 return dev->priv_flags & IFF_TEAM_PORT;
4628 static inline bool netif_is_lag_master(const struct net_device *dev)
4630 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4633 static inline bool netif_is_lag_port(const struct net_device *dev)
4635 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4638 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4640 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4643 static inline bool netif_is_failover(const struct net_device *dev)
4645 return dev->priv_flags & IFF_FAILOVER;
4648 static inline bool netif_is_failover_slave(const struct net_device *dev)
4650 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4653 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4654 static inline void netif_keep_dst(struct net_device *dev)
4656 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4659 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4660 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4662 /* TODO: reserve and use an additional IFF bit, if we get more users */
4663 return dev->priv_flags & IFF_MACSEC;
4666 extern struct pernet_operations __net_initdata loopback_net_ops;
4668 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4670 /* netdev_printk helpers, similar to dev_printk */
4672 static inline const char *netdev_name(const struct net_device *dev)
4674 if (!dev->name[0] || strchr(dev->name, '%'))
4675 return "(unnamed net_device)";
4679 static inline bool netdev_unregistering(const struct net_device *dev)
4681 return dev->reg_state == NETREG_UNREGISTERING;
4684 static inline const char *netdev_reg_state(const struct net_device *dev)
4686 switch (dev->reg_state) {
4687 case NETREG_UNINITIALIZED: return " (uninitialized)";
4688 case NETREG_REGISTERED: return "";
4689 case NETREG_UNREGISTERING: return " (unregistering)";
4690 case NETREG_UNREGISTERED: return " (unregistered)";
4691 case NETREG_RELEASED: return " (released)";
4692 case NETREG_DUMMY: return " (dummy)";
4695 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4696 return " (unknown)";
4699 __printf(3, 4) __cold
4700 void netdev_printk(const char *level, const struct net_device *dev,
4701 const char *format, ...);
4702 __printf(2, 3) __cold
4703 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4704 __printf(2, 3) __cold
4705 void netdev_alert(const struct net_device *dev, const char *format, ...);
4706 __printf(2, 3) __cold
4707 void netdev_crit(const struct net_device *dev, const char *format, ...);
4708 __printf(2, 3) __cold
4709 void netdev_err(const struct net_device *dev, const char *format, ...);
4710 __printf(2, 3) __cold
4711 void netdev_warn(const struct net_device *dev, const char *format, ...);
4712 __printf(2, 3) __cold
4713 void netdev_notice(const struct net_device *dev, const char *format, ...);
4714 __printf(2, 3) __cold
4715 void netdev_info(const struct net_device *dev, const char *format, ...);
4717 #define netdev_level_once(level, dev, fmt, ...) \
4719 static bool __print_once __read_mostly; \
4721 if (!__print_once) { \
4722 __print_once = true; \
4723 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4727 #define netdev_emerg_once(dev, fmt, ...) \
4728 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4729 #define netdev_alert_once(dev, fmt, ...) \
4730 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4731 #define netdev_crit_once(dev, fmt, ...) \
4732 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4733 #define netdev_err_once(dev, fmt, ...) \
4734 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4735 #define netdev_warn_once(dev, fmt, ...) \
4736 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4737 #define netdev_notice_once(dev, fmt, ...) \
4738 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4739 #define netdev_info_once(dev, fmt, ...) \
4740 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4742 #define MODULE_ALIAS_NETDEV(device) \
4743 MODULE_ALIAS("netdev-" device)
4745 #if defined(CONFIG_DYNAMIC_DEBUG)
4746 #define netdev_dbg(__dev, format, args...) \
4748 dynamic_netdev_dbg(__dev, format, ##args); \
4750 #elif defined(DEBUG)
4751 #define netdev_dbg(__dev, format, args...) \
4752 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4754 #define netdev_dbg(__dev, format, args...) \
4757 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4761 #if defined(VERBOSE_DEBUG)
4762 #define netdev_vdbg netdev_dbg
4765 #define netdev_vdbg(dev, format, args...) \
4768 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4774 * netdev_WARN() acts like dev_printk(), but with the key difference
4775 * of using a WARN/WARN_ON to get the message out, including the
4776 * file/line information and a backtrace.
4778 #define netdev_WARN(dev, format, args...) \
4779 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4780 netdev_reg_state(dev), ##args)
4782 #define netdev_WARN_ONCE(dev, format, args...) \
4783 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4784 netdev_reg_state(dev), ##args)
4786 /* netif printk helpers, similar to netdev_printk */
4788 #define netif_printk(priv, type, level, dev, fmt, args...) \
4790 if (netif_msg_##type(priv)) \
4791 netdev_printk(level, (dev), fmt, ##args); \
4794 #define netif_level(level, priv, type, dev, fmt, args...) \
4796 if (netif_msg_##type(priv)) \
4797 netdev_##level(dev, fmt, ##args); \
4800 #define netif_emerg(priv, type, dev, fmt, args...) \
4801 netif_level(emerg, priv, type, dev, fmt, ##args)
4802 #define netif_alert(priv, type, dev, fmt, args...) \
4803 netif_level(alert, priv, type, dev, fmt, ##args)
4804 #define netif_crit(priv, type, dev, fmt, args...) \
4805 netif_level(crit, priv, type, dev, fmt, ##args)
4806 #define netif_err(priv, type, dev, fmt, args...) \
4807 netif_level(err, priv, type, dev, fmt, ##args)
4808 #define netif_warn(priv, type, dev, fmt, args...) \
4809 netif_level(warn, priv, type, dev, fmt, ##args)
4810 #define netif_notice(priv, type, dev, fmt, args...) \
4811 netif_level(notice, priv, type, dev, fmt, ##args)
4812 #define netif_info(priv, type, dev, fmt, args...) \
4813 netif_level(info, priv, type, dev, fmt, ##args)
4815 #if defined(CONFIG_DYNAMIC_DEBUG)
4816 #define netif_dbg(priv, type, netdev, format, args...) \
4818 if (netif_msg_##type(priv)) \
4819 dynamic_netdev_dbg(netdev, format, ##args); \
4821 #elif defined(DEBUG)
4822 #define netif_dbg(priv, type, dev, format, args...) \
4823 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4825 #define netif_dbg(priv, type, dev, format, args...) \
4828 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4833 /* if @cond then downgrade to debug, else print at @level */
4834 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4837 netif_dbg(priv, type, netdev, fmt, ##args); \
4839 netif_ ## level(priv, type, netdev, fmt, ##args); \
4842 #if defined(VERBOSE_DEBUG)
4843 #define netif_vdbg netif_dbg
4845 #define netif_vdbg(priv, type, dev, format, args...) \
4848 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4854 * The list of packet types we will receive (as opposed to discard)
4855 * and the routines to invoke.
4857 * Why 16. Because with 16 the only overlap we get on a hash of the
4858 * low nibble of the protocol value is RARP/SNAP/X.25.
4872 #define PTYPE_HASH_SIZE (16)
4873 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4875 #endif /* _LINUX_NETDEVICE_H */