1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Definitions for the Interfaces handler.
9 * Version: @(#)dev.h 1.0.10 08/12/93
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Corey Minyard <wf-rch!minyard@relay.EU.net>
14 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
15 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
16 * Bjorn Ekwall. <bj0rn@blox.se>
17 * Pekka Riikonen <priikone@poseidon.pspt.fi>
19 * Moved to /usr/include/linux for NET3
21 #ifndef _LINUX_NETDEVICE_H
22 #define _LINUX_NETDEVICE_H
24 #include <linux/timer.h>
25 #include <linux/bug.h>
26 #include <linux/delay.h>
27 #include <linux/atomic.h>
28 #include <linux/prefetch.h>
29 #include <asm/cache.h>
30 #include <asm/byteorder.h>
32 #include <linux/percpu.h>
33 #include <linux/rculist.h>
34 #include <linux/workqueue.h>
35 #include <linux/dynamic_queue_limits.h>
37 #include <linux/ethtool.h>
38 #include <net/net_namespace.h>
40 #include <net/dcbnl.h>
42 #include <net/netprio_cgroup.h>
45 #include <linux/netdev_features.h>
46 #include <linux/neighbour.h>
47 #include <uapi/linux/netdevice.h>
48 #include <uapi/linux/if_bonding.h>
49 #include <uapi/linux/pkt_cls.h>
50 #include <linux/hashtable.h>
60 /* 802.15.4 specific */
63 /* UDP Tunnel offloads */
64 struct udp_tunnel_info;
68 void netdev_set_default_ethtool_ops(struct net_device *dev,
69 const struct ethtool_ops *ops);
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
76 * Transmit return codes: transmit return codes originate from three different
79 * - qdisc return codes
80 * - driver transmit return codes
83 * Drivers are allowed to return any one of those in their hard_start_xmit()
84 * function. Real network devices commonly used with qdiscs should only return
85 * the driver transmit return codes though - when qdiscs are used, the actual
86 * transmission happens asynchronously, so the value is not propagated to
87 * higher layers. Virtual network devices transmit synchronously; in this case
88 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
89 * others are propagated to higher layers.
92 /* qdisc ->enqueue() return codes. */
93 #define NET_XMIT_SUCCESS 0x00
94 #define NET_XMIT_DROP 0x01 /* skb dropped */
95 #define NET_XMIT_CN 0x02 /* congestion notification */
96 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
98 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
99 * indicates that the device will soon be dropping packets, or already drops
100 * some packets of the same priority; prompting us to send less aggressively. */
101 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
102 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
104 /* Driver transmit return codes */
105 #define NETDEV_TX_MASK 0xf0
108 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
109 NETDEV_TX_OK = 0x00, /* driver took care of packet */
110 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
112 typedef enum netdev_tx netdev_tx_t;
115 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
116 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
118 static inline bool dev_xmit_complete(int rc)
121 * Positive cases with an skb consumed by a driver:
122 * - successful transmission (rc == NETDEV_TX_OK)
123 * - error while transmitting (rc < 0)
124 * - error while queueing to a different device (rc & NET_XMIT_MASK)
126 if (likely(rc < NET_XMIT_MASK))
133 * Compute the worst-case header length according to the protocols
137 #if defined(CONFIG_HYPERV_NET)
138 # define LL_MAX_HEADER 128
139 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
140 # if defined(CONFIG_MAC80211_MESH)
141 # define LL_MAX_HEADER 128
143 # define LL_MAX_HEADER 96
146 # define LL_MAX_HEADER 32
149 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
150 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
151 #define MAX_HEADER LL_MAX_HEADER
153 #define MAX_HEADER (LL_MAX_HEADER + 48)
157 * Old network device statistics. Fields are native words
158 * (unsigned long) so they can be read and written atomically.
161 struct net_device_stats {
162 unsigned long rx_packets;
163 unsigned long tx_packets;
164 unsigned long rx_bytes;
165 unsigned long tx_bytes;
166 unsigned long rx_errors;
167 unsigned long tx_errors;
168 unsigned long rx_dropped;
169 unsigned long tx_dropped;
170 unsigned long multicast;
171 unsigned long collisions;
172 unsigned long rx_length_errors;
173 unsigned long rx_over_errors;
174 unsigned long rx_crc_errors;
175 unsigned long rx_frame_errors;
176 unsigned long rx_fifo_errors;
177 unsigned long rx_missed_errors;
178 unsigned long tx_aborted_errors;
179 unsigned long tx_carrier_errors;
180 unsigned long tx_fifo_errors;
181 unsigned long tx_heartbeat_errors;
182 unsigned long tx_window_errors;
183 unsigned long rx_compressed;
184 unsigned long tx_compressed;
188 #include <linux/cache.h>
189 #include <linux/skbuff.h>
192 #include <linux/static_key.h>
193 extern struct static_key_false rps_needed;
194 extern struct static_key_false rfs_needed;
201 struct netdev_hw_addr {
202 struct list_head list;
203 unsigned char addr[MAX_ADDR_LEN];
205 #define NETDEV_HW_ADDR_T_LAN 1
206 #define NETDEV_HW_ADDR_T_SAN 2
207 #define NETDEV_HW_ADDR_T_SLAVE 3
208 #define NETDEV_HW_ADDR_T_UNICAST 4
209 #define NETDEV_HW_ADDR_T_MULTICAST 5
214 struct rcu_head rcu_head;
217 struct netdev_hw_addr_list {
218 struct list_head list;
222 #define netdev_hw_addr_list_count(l) ((l)->count)
223 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
224 #define netdev_hw_addr_list_for_each(ha, l) \
225 list_for_each_entry(ha, &(l)->list, list)
227 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
228 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
229 #define netdev_for_each_uc_addr(ha, dev) \
230 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
232 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
233 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
234 #define netdev_for_each_mc_addr(ha, dev) \
235 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
241 /* cached hardware header; allow for machine alignment needs. */
242 #define HH_DATA_MOD 16
243 #define HH_DATA_OFF(__len) \
244 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
245 #define HH_DATA_ALIGN(__len) \
246 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
247 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
250 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
252 * dev->hard_header_len ? (dev->hard_header_len +
253 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
255 * We could use other alignment values, but we must maintain the
256 * relationship HH alignment <= LL alignment.
258 #define LL_RESERVED_SPACE(dev) \
259 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
260 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 int (*create) (struct sk_buff *skb, struct net_device *dev,
265 unsigned short type, const void *daddr,
266 const void *saddr, unsigned int len);
267 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
268 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
269 void (*cache_update)(struct hh_cache *hh,
270 const struct net_device *dev,
271 const unsigned char *haddr);
272 bool (*validate)(const char *ll_header, unsigned int len);
273 __be16 (*parse_protocol)(const struct sk_buff *skb);
276 /* These flag bits are private to the generic network queueing
277 * layer; they may not be explicitly referenced by any other
281 enum netdev_state_t {
283 __LINK_STATE_PRESENT,
284 __LINK_STATE_NOCARRIER,
285 __LINK_STATE_LINKWATCH_PENDING,
286 __LINK_STATE_DORMANT,
291 * This structure holds boot-time configured netdevice settings. They
292 * are then used in the device probing.
294 struct netdev_boot_setup {
298 #define NETDEV_BOOT_SETUP_MAX 8
300 int __init netdev_boot_setup(char *str);
303 struct list_head list;
308 * size of gro hash buckets, must less than bit number of
309 * napi_struct::gro_bitmask
311 #define GRO_HASH_BUCKETS 8
314 * Structure for NAPI scheduling similar to tasklet but with weighting
317 /* The poll_list must only be managed by the entity which
318 * changes the state of the NAPI_STATE_SCHED bit. This means
319 * whoever atomically sets that bit can add this napi_struct
320 * to the per-CPU poll_list, and whoever clears that bit
321 * can remove from the list right before clearing the bit.
323 struct list_head poll_list;
327 unsigned long gro_bitmask;
328 int (*poll)(struct napi_struct *, int);
329 #ifdef CONFIG_NETPOLL
332 struct net_device *dev;
333 struct gro_list gro_hash[GRO_HASH_BUCKETS];
335 struct list_head rx_list; /* Pending GRO_NORMAL skbs */
336 int rx_count; /* length of rx_list */
337 struct hrtimer timer;
338 struct list_head dev_list;
339 struct hlist_node napi_hash_node;
340 unsigned int napi_id;
344 NAPI_STATE_SCHED, /* Poll is scheduled */
345 NAPI_STATE_MISSED, /* reschedule a napi */
346 NAPI_STATE_DISABLE, /* Disable pending */
347 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
348 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
349 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
350 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
354 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
355 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
356 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
357 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
358 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
359 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
360 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
371 typedef enum gro_result gro_result_t;
374 * enum rx_handler_result - Possible return values for rx_handlers.
375 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
377 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
378 * case skb->dev was changed by rx_handler.
379 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
380 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
382 * rx_handlers are functions called from inside __netif_receive_skb(), to do
383 * special processing of the skb, prior to delivery to protocol handlers.
385 * Currently, a net_device can only have a single rx_handler registered. Trying
386 * to register a second rx_handler will return -EBUSY.
388 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
389 * To unregister a rx_handler on a net_device, use
390 * netdev_rx_handler_unregister().
392 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
395 * If the rx_handler consumed the skb in some way, it should return
396 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
397 * the skb to be delivered in some other way.
399 * If the rx_handler changed skb->dev, to divert the skb to another
400 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
401 * new device will be called if it exists.
403 * If the rx_handler decides the skb should be ignored, it should return
404 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
405 * are registered on exact device (ptype->dev == skb->dev).
407 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
408 * delivered, it should return RX_HANDLER_PASS.
410 * A device without a registered rx_handler will behave as if rx_handler
411 * returned RX_HANDLER_PASS.
414 enum rx_handler_result {
420 typedef enum rx_handler_result rx_handler_result_t;
421 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
423 void __napi_schedule(struct napi_struct *n);
424 void __napi_schedule_irqoff(struct napi_struct *n);
426 static inline bool napi_disable_pending(struct napi_struct *n)
428 return test_bit(NAPI_STATE_DISABLE, &n->state);
431 bool napi_schedule_prep(struct napi_struct *n);
434 * napi_schedule - schedule NAPI poll
437 * Schedule NAPI poll routine to be called if it is not already
440 static inline void napi_schedule(struct napi_struct *n)
442 if (napi_schedule_prep(n))
447 * napi_schedule_irqoff - schedule NAPI poll
450 * Variant of napi_schedule(), assuming hard irqs are masked.
452 static inline void napi_schedule_irqoff(struct napi_struct *n)
454 if (napi_schedule_prep(n))
455 __napi_schedule_irqoff(n);
458 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
459 static inline bool napi_reschedule(struct napi_struct *napi)
461 if (napi_schedule_prep(napi)) {
462 __napi_schedule(napi);
468 bool napi_complete_done(struct napi_struct *n, int work_done);
470 * napi_complete - NAPI processing complete
473 * Mark NAPI processing as complete.
474 * Consider using napi_complete_done() instead.
475 * Return false if device should avoid rearming interrupts.
477 static inline bool napi_complete(struct napi_struct *n)
479 return napi_complete_done(n, 0);
483 * napi_hash_del - remove a NAPI from global table
484 * @napi: NAPI context
486 * Warning: caller must observe RCU grace period
487 * before freeing memory containing @napi, if
488 * this function returns true.
489 * Note: core networking stack automatically calls it
490 * from netif_napi_del().
491 * Drivers might want to call this helper to combine all
492 * the needed RCU grace periods into a single one.
494 bool napi_hash_del(struct napi_struct *napi);
497 * napi_disable - prevent NAPI from scheduling
500 * Stop NAPI from being scheduled on this context.
501 * Waits till any outstanding processing completes.
503 void napi_disable(struct napi_struct *n);
506 * napi_enable - enable NAPI scheduling
509 * Resume NAPI from being scheduled on this context.
510 * Must be paired with napi_disable.
512 static inline void napi_enable(struct napi_struct *n)
514 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
515 smp_mb__before_atomic();
516 clear_bit(NAPI_STATE_SCHED, &n->state);
517 clear_bit(NAPI_STATE_NPSVC, &n->state);
521 * napi_synchronize - wait until NAPI is not running
524 * Wait until NAPI is done being scheduled on this context.
525 * Waits till any outstanding processing completes but
526 * does not disable future activations.
528 static inline void napi_synchronize(const struct napi_struct *n)
530 if (IS_ENABLED(CONFIG_SMP))
531 while (test_bit(NAPI_STATE_SCHED, &n->state))
538 * napi_if_scheduled_mark_missed - if napi is running, set the
542 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
545 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
547 unsigned long val, new;
550 val = READ_ONCE(n->state);
551 if (val & NAPIF_STATE_DISABLE)
554 if (!(val & NAPIF_STATE_SCHED))
557 new = val | NAPIF_STATE_MISSED;
558 } while (cmpxchg(&n->state, val, new) != val);
563 enum netdev_queue_state_t {
564 __QUEUE_STATE_DRV_XOFF,
565 __QUEUE_STATE_STACK_XOFF,
566 __QUEUE_STATE_FROZEN,
569 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
570 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
571 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
573 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
574 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
576 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
580 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
581 * netif_tx_* functions below are used to manipulate this flag. The
582 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
583 * queue independently. The netif_xmit_*stopped functions below are called
584 * to check if the queue has been stopped by the driver or stack (either
585 * of the XOFF bits are set in the state). Drivers should not need to call
586 * netif_xmit*stopped functions, they should only be using netif_tx_*.
589 struct netdev_queue {
593 struct net_device *dev;
594 struct Qdisc __rcu *qdisc;
595 struct Qdisc *qdisc_sleeping;
599 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
602 unsigned long tx_maxrate;
604 * Number of TX timeouts for this queue
605 * (/sys/class/net/DEV/Q/trans_timeout)
607 unsigned long trans_timeout;
609 /* Subordinate device that the queue has been assigned to */
610 struct net_device *sb_dev;
611 #ifdef CONFIG_XDP_SOCKETS
612 struct xdp_umem *umem;
617 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
620 * Time (in jiffies) of last Tx
622 unsigned long trans_start;
629 } ____cacheline_aligned_in_smp;
631 extern int sysctl_fb_tunnels_only_for_init_net;
632 extern int sysctl_devconf_inherit_init_net;
634 static inline bool net_has_fallback_tunnels(const struct net *net)
636 return net == &init_net ||
637 !IS_ENABLED(CONFIG_SYSCTL) ||
638 !sysctl_fb_tunnels_only_for_init_net;
641 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
643 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
650 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
652 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
659 * This structure holds an RPS map which can be of variable length. The
660 * map is an array of CPUs.
667 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
670 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
671 * tail pointer for that CPU's input queue at the time of last enqueue, and
672 * a hardware filter index.
674 struct rps_dev_flow {
677 unsigned int last_qtail;
679 #define RPS_NO_FILTER 0xffff
682 * The rps_dev_flow_table structure contains a table of flow mappings.
684 struct rps_dev_flow_table {
687 struct rps_dev_flow flows[0];
689 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
690 ((_num) * sizeof(struct rps_dev_flow)))
693 * The rps_sock_flow_table contains mappings of flows to the last CPU
694 * on which they were processed by the application (set in recvmsg).
695 * Each entry is a 32bit value. Upper part is the high-order bits
696 * of flow hash, lower part is CPU number.
697 * rps_cpu_mask is used to partition the space, depending on number of
698 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
699 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
700 * meaning we use 32-6=26 bits for the hash.
702 struct rps_sock_flow_table {
705 u32 ents[0] ____cacheline_aligned_in_smp;
707 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
709 #define RPS_NO_CPU 0xffff
711 extern u32 rps_cpu_mask;
712 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
714 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
718 unsigned int index = hash & table->mask;
719 u32 val = hash & ~rps_cpu_mask;
721 /* We only give a hint, preemption can change CPU under us */
722 val |= raw_smp_processor_id();
724 if (table->ents[index] != val)
725 table->ents[index] = val;
729 #ifdef CONFIG_RFS_ACCEL
730 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
733 #endif /* CONFIG_RPS */
735 /* This structure contains an instance of an RX queue. */
736 struct netdev_rx_queue {
738 struct rps_map __rcu *rps_map;
739 struct rps_dev_flow_table __rcu *rps_flow_table;
742 struct net_device *dev;
743 struct xdp_rxq_info xdp_rxq;
744 #ifdef CONFIG_XDP_SOCKETS
745 struct xdp_umem *umem;
747 } ____cacheline_aligned_in_smp;
750 * RX queue sysfs structures and functions.
752 struct rx_queue_attribute {
753 struct attribute attr;
754 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
755 ssize_t (*store)(struct netdev_rx_queue *queue,
756 const char *buf, size_t len);
761 * This structure holds an XPS map which can be of variable length. The
762 * map is an array of queues.
766 unsigned int alloc_len;
770 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
771 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
772 - sizeof(struct xps_map)) / sizeof(u16))
775 * This structure holds all XPS maps for device. Maps are indexed by CPU.
777 struct xps_dev_maps {
779 struct xps_map __rcu *attr_map[0]; /* Either CPUs map or RXQs map */
782 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
783 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
785 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
786 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
788 #endif /* CONFIG_XPS */
790 #define TC_MAX_QUEUE 16
791 #define TC_BITMASK 15
792 /* HW offloaded queuing disciplines txq count and offset maps */
793 struct netdev_tc_txq {
798 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
800 * This structure is to hold information about the device
801 * configured to run FCoE protocol stack.
803 struct netdev_fcoe_hbainfo {
804 char manufacturer[64];
805 char serial_number[64];
806 char hardware_version[64];
807 char driver_version[64];
808 char optionrom_version[64];
809 char firmware_version[64];
811 char model_description[256];
815 #define MAX_PHYS_ITEM_ID_LEN 32
817 /* This structure holds a unique identifier to identify some
818 * physical item (port for example) used by a netdevice.
820 struct netdev_phys_item_id {
821 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
822 unsigned char id_len;
825 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
826 struct netdev_phys_item_id *b)
828 return a->id_len == b->id_len &&
829 memcmp(a->id, b->id, a->id_len) == 0;
832 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
834 struct net_device *sb_dev);
837 TC_SETUP_QDISC_MQPRIO,
840 TC_SETUP_CLSMATCHALL,
850 TC_SETUP_QDISC_TAPRIO,
856 /* These structures hold the attributes of bpf state that are being passed
857 * to the netdevice through the bpf op.
859 enum bpf_netdev_command {
860 /* Set or clear a bpf program used in the earliest stages of packet
861 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
862 * is responsible for calling bpf_prog_put on any old progs that are
863 * stored. In case of error, the callee need not release the new prog
864 * reference, but on success it takes ownership and must bpf_prog_put
865 * when it is no longer used.
871 /* BPF program for offload callbacks, invoked at program load time. */
872 BPF_OFFLOAD_MAP_ALLOC,
873 BPF_OFFLOAD_MAP_FREE,
877 struct bpf_prog_offload_ops;
878 struct netlink_ext_ack;
880 struct xdp_dev_bulk_queue;
883 enum bpf_netdev_command command;
888 struct bpf_prog *prog;
889 struct netlink_ext_ack *extack;
891 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
894 /* flags with which program was installed */
897 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
899 struct bpf_offloaded_map *offmap;
901 /* XDP_SETUP_XSK_UMEM */
903 struct xdp_umem *umem;
909 /* Flags for ndo_xsk_wakeup. */
910 #define XDP_WAKEUP_RX (1 << 0)
911 #define XDP_WAKEUP_TX (1 << 1)
913 #ifdef CONFIG_XFRM_OFFLOAD
915 int (*xdo_dev_state_add) (struct xfrm_state *x);
916 void (*xdo_dev_state_delete) (struct xfrm_state *x);
917 void (*xdo_dev_state_free) (struct xfrm_state *x);
918 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
919 struct xfrm_state *x);
920 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
925 struct rcu_head rcuhead;
932 struct netdev_name_node {
933 struct hlist_node hlist;
934 struct list_head list;
935 struct net_device *dev;
939 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
940 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
942 struct netdev_net_notifier {
943 struct list_head list;
944 struct notifier_block *nb;
948 * This structure defines the management hooks for network devices.
949 * The following hooks can be defined; unless noted otherwise, they are
950 * optional and can be filled with a null pointer.
952 * int (*ndo_init)(struct net_device *dev);
953 * This function is called once when a network device is registered.
954 * The network device can use this for any late stage initialization
955 * or semantic validation. It can fail with an error code which will
956 * be propagated back to register_netdev.
958 * void (*ndo_uninit)(struct net_device *dev);
959 * This function is called when device is unregistered or when registration
960 * fails. It is not called if init fails.
962 * int (*ndo_open)(struct net_device *dev);
963 * This function is called when a network device transitions to the up
966 * int (*ndo_stop)(struct net_device *dev);
967 * This function is called when a network device transitions to the down
970 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
971 * struct net_device *dev);
972 * Called when a packet needs to be transmitted.
973 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
974 * the queue before that can happen; it's for obsolete devices and weird
975 * corner cases, but the stack really does a non-trivial amount
976 * of useless work if you return NETDEV_TX_BUSY.
977 * Required; cannot be NULL.
979 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
980 * struct net_device *dev
981 * netdev_features_t features);
982 * Called by core transmit path to determine if device is capable of
983 * performing offload operations on a given packet. This is to give
984 * the device an opportunity to implement any restrictions that cannot
985 * be otherwise expressed by feature flags. The check is called with
986 * the set of features that the stack has calculated and it returns
987 * those the driver believes to be appropriate.
989 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
990 * struct net_device *sb_dev);
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, unsigned int txqueue);
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 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1255 * This function is used to wake up the softirq, ksoftirqd or kthread
1256 * responsible for sending and/or receiving packets on a specific
1257 * queue id bound to an AF_XDP socket. The flags field specifies if
1258 * only RX, only Tx, or both should be woken up using the flags
1259 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1260 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1261 * Get devlink port instance associated with a given netdev.
1262 * Called with a reference on the netdevice and devlink locks only,
1263 * rtnl_lock is not held.
1265 struct net_device_ops {
1266 int (*ndo_init)(struct net_device *dev);
1267 void (*ndo_uninit)(struct net_device *dev);
1268 int (*ndo_open)(struct net_device *dev);
1269 int (*ndo_stop)(struct net_device *dev);
1270 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1271 struct net_device *dev);
1272 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1273 struct net_device *dev,
1274 netdev_features_t features);
1275 u16 (*ndo_select_queue)(struct net_device *dev,
1276 struct sk_buff *skb,
1277 struct net_device *sb_dev);
1278 void (*ndo_change_rx_flags)(struct net_device *dev,
1280 void (*ndo_set_rx_mode)(struct net_device *dev);
1281 int (*ndo_set_mac_address)(struct net_device *dev,
1283 int (*ndo_validate_addr)(struct net_device *dev);
1284 int (*ndo_do_ioctl)(struct net_device *dev,
1285 struct ifreq *ifr, int cmd);
1286 int (*ndo_set_config)(struct net_device *dev,
1288 int (*ndo_change_mtu)(struct net_device *dev,
1290 int (*ndo_neigh_setup)(struct net_device *dev,
1291 struct neigh_parms *);
1292 void (*ndo_tx_timeout) (struct net_device *dev,
1293 unsigned int txqueue);
1295 void (*ndo_get_stats64)(struct net_device *dev,
1296 struct rtnl_link_stats64 *storage);
1297 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1298 int (*ndo_get_offload_stats)(int attr_id,
1299 const struct net_device *dev,
1301 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1303 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1304 __be16 proto, u16 vid);
1305 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1306 __be16 proto, u16 vid);
1307 #ifdef CONFIG_NET_POLL_CONTROLLER
1308 void (*ndo_poll_controller)(struct net_device *dev);
1309 int (*ndo_netpoll_setup)(struct net_device *dev,
1310 struct netpoll_info *info);
1311 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1313 int (*ndo_set_vf_mac)(struct net_device *dev,
1314 int queue, u8 *mac);
1315 int (*ndo_set_vf_vlan)(struct net_device *dev,
1316 int queue, u16 vlan,
1317 u8 qos, __be16 proto);
1318 int (*ndo_set_vf_rate)(struct net_device *dev,
1319 int vf, int min_tx_rate,
1321 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1322 int vf, bool setting);
1323 int (*ndo_set_vf_trust)(struct net_device *dev,
1324 int vf, bool setting);
1325 int (*ndo_get_vf_config)(struct net_device *dev,
1327 struct ifla_vf_info *ivf);
1328 int (*ndo_set_vf_link_state)(struct net_device *dev,
1329 int vf, int link_state);
1330 int (*ndo_get_vf_stats)(struct net_device *dev,
1332 struct ifla_vf_stats
1334 int (*ndo_set_vf_port)(struct net_device *dev,
1336 struct nlattr *port[]);
1337 int (*ndo_get_vf_port)(struct net_device *dev,
1338 int vf, struct sk_buff *skb);
1339 int (*ndo_get_vf_guid)(struct net_device *dev,
1341 struct ifla_vf_guid *node_guid,
1342 struct ifla_vf_guid *port_guid);
1343 int (*ndo_set_vf_guid)(struct net_device *dev,
1346 int (*ndo_set_vf_rss_query_en)(
1347 struct net_device *dev,
1348 int vf, bool setting);
1349 int (*ndo_setup_tc)(struct net_device *dev,
1350 enum tc_setup_type type,
1352 #if IS_ENABLED(CONFIG_FCOE)
1353 int (*ndo_fcoe_enable)(struct net_device *dev);
1354 int (*ndo_fcoe_disable)(struct net_device *dev);
1355 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1357 struct scatterlist *sgl,
1359 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1361 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1363 struct scatterlist *sgl,
1365 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1366 struct netdev_fcoe_hbainfo *hbainfo);
1369 #if IS_ENABLED(CONFIG_LIBFCOE)
1370 #define NETDEV_FCOE_WWNN 0
1371 #define NETDEV_FCOE_WWPN 1
1372 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1373 u64 *wwn, int type);
1376 #ifdef CONFIG_RFS_ACCEL
1377 int (*ndo_rx_flow_steer)(struct net_device *dev,
1378 const struct sk_buff *skb,
1382 int (*ndo_add_slave)(struct net_device *dev,
1383 struct net_device *slave_dev,
1384 struct netlink_ext_ack *extack);
1385 int (*ndo_del_slave)(struct net_device *dev,
1386 struct net_device *slave_dev);
1387 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1388 netdev_features_t features);
1389 int (*ndo_set_features)(struct net_device *dev,
1390 netdev_features_t features);
1391 int (*ndo_neigh_construct)(struct net_device *dev,
1392 struct neighbour *n);
1393 void (*ndo_neigh_destroy)(struct net_device *dev,
1394 struct neighbour *n);
1396 int (*ndo_fdb_add)(struct ndmsg *ndm,
1397 struct nlattr *tb[],
1398 struct net_device *dev,
1399 const unsigned char *addr,
1402 struct netlink_ext_ack *extack);
1403 int (*ndo_fdb_del)(struct ndmsg *ndm,
1404 struct nlattr *tb[],
1405 struct net_device *dev,
1406 const unsigned char *addr,
1408 int (*ndo_fdb_dump)(struct sk_buff *skb,
1409 struct netlink_callback *cb,
1410 struct net_device *dev,
1411 struct net_device *filter_dev,
1413 int (*ndo_fdb_get)(struct sk_buff *skb,
1414 struct nlattr *tb[],
1415 struct net_device *dev,
1416 const unsigned char *addr,
1417 u16 vid, u32 portid, u32 seq,
1418 struct netlink_ext_ack *extack);
1419 int (*ndo_bridge_setlink)(struct net_device *dev,
1420 struct nlmsghdr *nlh,
1422 struct netlink_ext_ack *extack);
1423 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1425 struct net_device *dev,
1428 int (*ndo_bridge_dellink)(struct net_device *dev,
1429 struct nlmsghdr *nlh,
1431 int (*ndo_change_carrier)(struct net_device *dev,
1433 int (*ndo_get_phys_port_id)(struct net_device *dev,
1434 struct netdev_phys_item_id *ppid);
1435 int (*ndo_get_port_parent_id)(struct net_device *dev,
1436 struct netdev_phys_item_id *ppid);
1437 int (*ndo_get_phys_port_name)(struct net_device *dev,
1438 char *name, size_t len);
1439 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1440 struct udp_tunnel_info *ti);
1441 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1442 struct udp_tunnel_info *ti);
1443 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1444 struct net_device *dev);
1445 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1448 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1451 int (*ndo_get_iflink)(const struct net_device *dev);
1452 int (*ndo_change_proto_down)(struct net_device *dev,
1454 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1455 struct sk_buff *skb);
1456 void (*ndo_set_rx_headroom)(struct net_device *dev,
1457 int needed_headroom);
1458 int (*ndo_bpf)(struct net_device *dev,
1459 struct netdev_bpf *bpf);
1460 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1461 struct xdp_frame **xdp,
1463 int (*ndo_xsk_wakeup)(struct net_device *dev,
1464 u32 queue_id, u32 flags);
1465 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1469 * enum net_device_priv_flags - &struct net_device priv_flags
1471 * These are the &struct net_device, they are only set internally
1472 * by drivers and used in the kernel. These flags are invisible to
1473 * userspace; this means that the order of these flags can change
1474 * during any kernel release.
1476 * You should have a pretty good reason to be extending these flags.
1478 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1479 * @IFF_EBRIDGE: Ethernet bridging device
1480 * @IFF_BONDING: bonding master or slave
1481 * @IFF_ISATAP: ISATAP interface (RFC4214)
1482 * @IFF_WAN_HDLC: WAN HDLC device
1483 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1485 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1486 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1487 * @IFF_MACVLAN_PORT: device used as macvlan port
1488 * @IFF_BRIDGE_PORT: device used as bridge port
1489 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1490 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1491 * @IFF_UNICAST_FLT: Supports unicast filtering
1492 * @IFF_TEAM_PORT: device used as team port
1493 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1494 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1495 * change when it's running
1496 * @IFF_MACVLAN: Macvlan device
1497 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1498 * underlying stacked devices
1499 * @IFF_L3MDEV_MASTER: device is an L3 master device
1500 * @IFF_NO_QUEUE: device can run without qdisc attached
1501 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1502 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1503 * @IFF_TEAM: device is a team device
1504 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1505 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1506 * entity (i.e. the master device for bridged veth)
1507 * @IFF_MACSEC: device is a MACsec device
1508 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1509 * @IFF_FAILOVER: device is a failover master device
1510 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1511 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1512 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1514 enum netdev_priv_flags {
1515 IFF_802_1Q_VLAN = 1<<0,
1519 IFF_WAN_HDLC = 1<<4,
1520 IFF_XMIT_DST_RELEASE = 1<<5,
1521 IFF_DONT_BRIDGE = 1<<6,
1522 IFF_DISABLE_NETPOLL = 1<<7,
1523 IFF_MACVLAN_PORT = 1<<8,
1524 IFF_BRIDGE_PORT = 1<<9,
1525 IFF_OVS_DATAPATH = 1<<10,
1526 IFF_TX_SKB_SHARING = 1<<11,
1527 IFF_UNICAST_FLT = 1<<12,
1528 IFF_TEAM_PORT = 1<<13,
1529 IFF_SUPP_NOFCS = 1<<14,
1530 IFF_LIVE_ADDR_CHANGE = 1<<15,
1531 IFF_MACVLAN = 1<<16,
1532 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1533 IFF_L3MDEV_MASTER = 1<<18,
1534 IFF_NO_QUEUE = 1<<19,
1535 IFF_OPENVSWITCH = 1<<20,
1536 IFF_L3MDEV_SLAVE = 1<<21,
1538 IFF_RXFH_CONFIGURED = 1<<23,
1539 IFF_PHONY_HEADROOM = 1<<24,
1541 IFF_NO_RX_HANDLER = 1<<26,
1542 IFF_FAILOVER = 1<<27,
1543 IFF_FAILOVER_SLAVE = 1<<28,
1544 IFF_L3MDEV_RX_HANDLER = 1<<29,
1545 IFF_LIVE_RENAME_OK = 1<<30,
1548 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1549 #define IFF_EBRIDGE IFF_EBRIDGE
1550 #define IFF_BONDING IFF_BONDING
1551 #define IFF_ISATAP IFF_ISATAP
1552 #define IFF_WAN_HDLC IFF_WAN_HDLC
1553 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1554 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1555 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1556 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1557 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1558 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1559 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1560 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1561 #define IFF_TEAM_PORT IFF_TEAM_PORT
1562 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1563 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1564 #define IFF_MACVLAN IFF_MACVLAN
1565 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1566 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1567 #define IFF_NO_QUEUE IFF_NO_QUEUE
1568 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1569 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1570 #define IFF_TEAM IFF_TEAM
1571 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1572 #define IFF_MACSEC IFF_MACSEC
1573 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1574 #define IFF_FAILOVER IFF_FAILOVER
1575 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1576 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1577 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1580 * struct net_device - The DEVICE structure.
1582 * Actually, this whole structure is a big mistake. It mixes I/O
1583 * data with strictly "high-level" data, and it has to know about
1584 * almost every data structure used in the INET module.
1586 * @name: This is the first field of the "visible" part of this structure
1587 * (i.e. as seen by users in the "Space.c" file). It is the name
1590 * @name_node: Name hashlist node
1591 * @ifalias: SNMP alias
1592 * @mem_end: Shared memory end
1593 * @mem_start: Shared memory start
1594 * @base_addr: Device I/O address
1595 * @irq: Device IRQ number
1597 * @state: Generic network queuing layer state, see netdev_state_t
1598 * @dev_list: The global list of network devices
1599 * @napi_list: List entry used for polling NAPI devices
1600 * @unreg_list: List entry when we are unregistering the
1601 * device; see the function unregister_netdev
1602 * @close_list: List entry used when we are closing the device
1603 * @ptype_all: Device-specific packet handlers for all protocols
1604 * @ptype_specific: Device-specific, protocol-specific packet handlers
1606 * @adj_list: Directly linked devices, like slaves for bonding
1607 * @features: Currently active device features
1608 * @hw_features: User-changeable features
1610 * @wanted_features: User-requested features
1611 * @vlan_features: Mask of features inheritable by VLAN devices
1613 * @hw_enc_features: Mask of features inherited by encapsulating devices
1614 * This field indicates what encapsulation
1615 * offloads the hardware is capable of doing,
1616 * and drivers will need to set them appropriately.
1618 * @mpls_features: Mask of features inheritable by MPLS
1620 * @ifindex: interface index
1621 * @group: The group the device belongs to
1623 * @stats: Statistics struct, which was left as a legacy, use
1624 * rtnl_link_stats64 instead
1626 * @rx_dropped: Dropped packets by core network,
1627 * do not use this in drivers
1628 * @tx_dropped: Dropped packets by core network,
1629 * do not use this in drivers
1630 * @rx_nohandler: nohandler dropped packets by core network on
1631 * inactive devices, do not use this in drivers
1632 * @carrier_up_count: Number of times the carrier has been up
1633 * @carrier_down_count: Number of times the carrier has been down
1635 * @wireless_handlers: List of functions to handle Wireless Extensions,
1637 * see <net/iw_handler.h> for details.
1638 * @wireless_data: Instance data managed by the core of wireless extensions
1640 * @netdev_ops: Includes several pointers to callbacks,
1641 * if one wants to override the ndo_*() functions
1642 * @ethtool_ops: Management operations
1643 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1644 * discovery handling. Necessary for e.g. 6LoWPAN.
1645 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1646 * of Layer 2 headers.
1648 * @flags: Interface flags (a la BSD)
1649 * @priv_flags: Like 'flags' but invisible to userspace,
1650 * see if.h for the definitions
1651 * @gflags: Global flags ( kept as legacy )
1652 * @padded: How much padding added by alloc_netdev()
1653 * @operstate: RFC2863 operstate
1654 * @link_mode: Mapping policy to operstate
1655 * @if_port: Selectable AUI, TP, ...
1657 * @mtu: Interface MTU value
1658 * @min_mtu: Interface Minimum MTU value
1659 * @max_mtu: Interface Maximum MTU value
1660 * @type: Interface hardware type
1661 * @hard_header_len: Maximum hardware header length.
1662 * @min_header_len: Minimum hardware header length
1664 * @needed_headroom: Extra headroom the hardware may need, but not in all
1665 * cases can this be guaranteed
1666 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1667 * cases can this be guaranteed. Some cases also use
1668 * LL_MAX_HEADER instead to allocate the skb
1670 * interface address info:
1672 * @perm_addr: Permanent hw address
1673 * @addr_assign_type: Hw address assignment type
1674 * @addr_len: Hardware address length
1675 * @upper_level: Maximum depth level of upper devices.
1676 * @lower_level: Maximum depth level of lower devices.
1677 * @neigh_priv_len: Used in neigh_alloc()
1678 * @dev_id: Used to differentiate devices that share
1679 * the same link layer address
1680 * @dev_port: Used to differentiate devices that share
1682 * @addr_list_lock: XXX: need comments on this one
1683 * @uc_promisc: Counter that indicates promiscuous mode
1684 * has been enabled due to the need to listen to
1685 * additional unicast addresses in a device that
1686 * does not implement ndo_set_rx_mode()
1687 * @uc: unicast mac addresses
1688 * @mc: multicast mac addresses
1689 * @dev_addrs: list of device hw addresses
1690 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1691 * @promiscuity: Number of times the NIC is told to work in
1692 * promiscuous mode; if it becomes 0 the NIC will
1693 * exit promiscuous mode
1694 * @allmulti: Counter, enables or disables allmulticast mode
1696 * @vlan_info: VLAN info
1697 * @dsa_ptr: dsa specific data
1698 * @tipc_ptr: TIPC specific data
1699 * @atalk_ptr: AppleTalk link
1700 * @ip_ptr: IPv4 specific data
1701 * @dn_ptr: DECnet specific data
1702 * @ip6_ptr: IPv6 specific data
1703 * @ax25_ptr: AX.25 specific data
1704 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1706 * @dev_addr: Hw address (before bcast,
1707 * because most packets are unicast)
1709 * @_rx: Array of RX queues
1710 * @num_rx_queues: Number of RX queues
1711 * allocated at register_netdev() time
1712 * @real_num_rx_queues: Number of RX queues currently active in device
1714 * @rx_handler: handler for received packets
1715 * @rx_handler_data: XXX: need comments on this one
1716 * @miniq_ingress: ingress/clsact qdisc specific data for
1717 * ingress processing
1718 * @ingress_queue: XXX: need comments on this one
1719 * @nf_hooks_ingress: netfilter hooks executed for ingress packets
1720 * @broadcast: hw bcast address
1722 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1723 * indexed by RX queue number. Assigned by driver.
1724 * This must only be set if the ndo_rx_flow_steer
1725 * operation is defined
1726 * @index_hlist: Device index hash chain
1728 * @_tx: Array of TX queues
1729 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1730 * @real_num_tx_queues: Number of TX queues currently active in device
1731 * @qdisc: Root qdisc from userspace point of view
1732 * @tx_queue_len: Max frames per queue allowed
1733 * @tx_global_lock: XXX: need comments on this one
1735 * @xps_maps: XXX: need comments on this one
1736 * @miniq_egress: clsact qdisc specific data for
1738 * @watchdog_timeo: Represents the timeout that is used by
1739 * the watchdog (see dev_watchdog())
1740 * @watchdog_timer: List of timers
1742 * @pcpu_refcnt: Number of references to this device
1743 * @todo_list: Delayed register/unregister
1744 * @link_watch_list: XXX: need comments on this one
1746 * @reg_state: Register/unregister state machine
1747 * @dismantle: Device is going to be freed
1748 * @rtnl_link_state: This enum represents the phases of creating
1751 * @needs_free_netdev: Should unregister perform free_netdev?
1752 * @priv_destructor: Called from unregister
1753 * @npinfo: XXX: need comments on this one
1754 * @nd_net: Network namespace this network device is inside
1756 * @ml_priv: Mid-layer private
1757 * @lstats: Loopback statistics
1758 * @tstats: Tunnel statistics
1759 * @dstats: Dummy statistics
1760 * @vstats: Virtual ethernet statistics
1765 * @dev: Class/net/name entry
1766 * @sysfs_groups: Space for optional device, statistics and wireless
1769 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1770 * @rtnl_link_ops: Rtnl_link_ops
1772 * @gso_max_size: Maximum size of generic segmentation offload
1773 * @gso_max_segs: Maximum number of segments that can be passed to the
1776 * @dcbnl_ops: Data Center Bridging netlink ops
1777 * @num_tc: Number of traffic classes in the net device
1778 * @tc_to_txq: XXX: need comments on this one
1779 * @prio_tc_map: XXX: need comments on this one
1781 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1783 * @priomap: XXX: need comments on this one
1784 * @phydev: Physical device may attach itself
1785 * for hardware timestamping
1786 * @sfp_bus: attached &struct sfp_bus structure.
1787 * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
1789 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1790 * @qdisc_xmit_lock_key: lockdep class annotating
1791 * netdev_queue->_xmit_lock spinlock
1792 * @addr_list_lock_key: lockdep class annotating
1793 * net_device->addr_list_lock spinlock
1795 * @proto_down: protocol port state information can be sent to the
1796 * switch driver and used to set the phys state of the
1799 * @wol_enabled: Wake-on-LAN is enabled
1801 * @net_notifier_list: List of per-net netdev notifier block
1802 * that follow this device when it is moved
1803 * to another network namespace.
1805 * FIXME: cleanup struct net_device such that network protocol info
1810 char name[IFNAMSIZ];
1811 struct netdev_name_node *name_node;
1812 struct dev_ifalias __rcu *ifalias;
1814 * I/O specific fields
1815 * FIXME: Merge these and struct ifmap into one
1817 unsigned long mem_end;
1818 unsigned long mem_start;
1819 unsigned long base_addr;
1823 * Some hardware also needs these fields (state,dev_list,
1824 * napi_list,unreg_list,close_list) but they are not
1825 * part of the usual set specified in Space.c.
1828 unsigned long state;
1830 struct list_head dev_list;
1831 struct list_head napi_list;
1832 struct list_head unreg_list;
1833 struct list_head close_list;
1834 struct list_head ptype_all;
1835 struct list_head ptype_specific;
1838 struct list_head upper;
1839 struct list_head lower;
1842 netdev_features_t features;
1843 netdev_features_t hw_features;
1844 netdev_features_t wanted_features;
1845 netdev_features_t vlan_features;
1846 netdev_features_t hw_enc_features;
1847 netdev_features_t mpls_features;
1848 netdev_features_t gso_partial_features;
1853 struct net_device_stats stats;
1855 atomic_long_t rx_dropped;
1856 atomic_long_t tx_dropped;
1857 atomic_long_t rx_nohandler;
1859 /* Stats to monitor link on/off, flapping */
1860 atomic_t carrier_up_count;
1861 atomic_t carrier_down_count;
1863 #ifdef CONFIG_WIRELESS_EXT
1864 const struct iw_handler_def *wireless_handlers;
1865 struct iw_public_data *wireless_data;
1867 const struct net_device_ops *netdev_ops;
1868 const struct ethtool_ops *ethtool_ops;
1869 #ifdef CONFIG_NET_L3_MASTER_DEV
1870 const struct l3mdev_ops *l3mdev_ops;
1872 #if IS_ENABLED(CONFIG_IPV6)
1873 const struct ndisc_ops *ndisc_ops;
1876 #ifdef CONFIG_XFRM_OFFLOAD
1877 const struct xfrmdev_ops *xfrmdev_ops;
1880 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1881 const struct tlsdev_ops *tlsdev_ops;
1884 const struct header_ops *header_ops;
1887 unsigned int priv_flags;
1889 unsigned short gflags;
1890 unsigned short padded;
1892 unsigned char operstate;
1893 unsigned char link_mode;
1895 unsigned char if_port;
1898 /* Note : dev->mtu is often read without holding a lock.
1899 * Writers usually hold RTNL.
1900 * It is recommended to use READ_ONCE() to annotate the reads,
1901 * and to use WRITE_ONCE() to annotate the writes.
1904 unsigned int min_mtu;
1905 unsigned int max_mtu;
1906 unsigned short type;
1907 unsigned short hard_header_len;
1908 unsigned char min_header_len;
1910 unsigned short needed_headroom;
1911 unsigned short needed_tailroom;
1913 /* Interface address info. */
1914 unsigned char perm_addr[MAX_ADDR_LEN];
1915 unsigned char addr_assign_type;
1916 unsigned char addr_len;
1917 unsigned char upper_level;
1918 unsigned char lower_level;
1919 unsigned short neigh_priv_len;
1920 unsigned short dev_id;
1921 unsigned short dev_port;
1922 spinlock_t addr_list_lock;
1923 unsigned char name_assign_type;
1925 struct netdev_hw_addr_list uc;
1926 struct netdev_hw_addr_list mc;
1927 struct netdev_hw_addr_list dev_addrs;
1930 struct kset *queues_kset;
1932 unsigned int promiscuity;
1933 unsigned int allmulti;
1936 /* Protocol-specific pointers */
1938 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1939 struct vlan_info __rcu *vlan_info;
1941 #if IS_ENABLED(CONFIG_NET_DSA)
1942 struct dsa_port *dsa_ptr;
1944 #if IS_ENABLED(CONFIG_TIPC)
1945 struct tipc_bearer __rcu *tipc_ptr;
1947 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1950 struct in_device __rcu *ip_ptr;
1951 #if IS_ENABLED(CONFIG_DECNET)
1952 struct dn_dev __rcu *dn_ptr;
1954 struct inet6_dev __rcu *ip6_ptr;
1955 #if IS_ENABLED(CONFIG_AX25)
1958 struct wireless_dev *ieee80211_ptr;
1959 struct wpan_dev *ieee802154_ptr;
1960 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1961 struct mpls_dev __rcu *mpls_ptr;
1965 * Cache lines mostly used on receive path (including eth_type_trans())
1967 /* Interface address info used in eth_type_trans() */
1968 unsigned char *dev_addr;
1970 struct netdev_rx_queue *_rx;
1971 unsigned int num_rx_queues;
1972 unsigned int real_num_rx_queues;
1974 struct bpf_prog __rcu *xdp_prog;
1975 unsigned long gro_flush_timeout;
1976 rx_handler_func_t __rcu *rx_handler;
1977 void __rcu *rx_handler_data;
1979 #ifdef CONFIG_NET_CLS_ACT
1980 struct mini_Qdisc __rcu *miniq_ingress;
1982 struct netdev_queue __rcu *ingress_queue;
1983 #ifdef CONFIG_NETFILTER_INGRESS
1984 struct nf_hook_entries __rcu *nf_hooks_ingress;
1987 unsigned char broadcast[MAX_ADDR_LEN];
1988 #ifdef CONFIG_RFS_ACCEL
1989 struct cpu_rmap *rx_cpu_rmap;
1991 struct hlist_node index_hlist;
1994 * Cache lines mostly used on transmit path
1996 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1997 unsigned int num_tx_queues;
1998 unsigned int real_num_tx_queues;
1999 struct Qdisc *qdisc;
2000 unsigned int tx_queue_len;
2001 spinlock_t tx_global_lock;
2003 struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
2006 struct xps_dev_maps __rcu *xps_cpus_map;
2007 struct xps_dev_maps __rcu *xps_rxqs_map;
2009 #ifdef CONFIG_NET_CLS_ACT
2010 struct mini_Qdisc __rcu *miniq_egress;
2013 #ifdef CONFIG_NET_SCHED
2014 DECLARE_HASHTABLE (qdisc_hash, 4);
2016 /* These may be needed for future network-power-down code. */
2017 struct timer_list watchdog_timer;
2020 struct list_head todo_list;
2021 int __percpu *pcpu_refcnt;
2023 struct list_head link_watch_list;
2025 enum { NETREG_UNINITIALIZED=0,
2026 NETREG_REGISTERED, /* completed register_netdevice */
2027 NETREG_UNREGISTERING, /* called unregister_netdevice */
2028 NETREG_UNREGISTERED, /* completed unregister todo */
2029 NETREG_RELEASED, /* called free_netdev */
2030 NETREG_DUMMY, /* dummy device for NAPI poll */
2036 RTNL_LINK_INITIALIZED,
2037 RTNL_LINK_INITIALIZING,
2038 } rtnl_link_state:16;
2040 bool needs_free_netdev;
2041 void (*priv_destructor)(struct net_device *dev);
2043 #ifdef CONFIG_NETPOLL
2044 struct netpoll_info __rcu *npinfo;
2047 possible_net_t nd_net;
2049 /* mid-layer private */
2052 struct pcpu_lstats __percpu *lstats;
2053 struct pcpu_sw_netstats __percpu *tstats;
2054 struct pcpu_dstats __percpu *dstats;
2057 #if IS_ENABLED(CONFIG_GARP)
2058 struct garp_port __rcu *garp_port;
2060 #if IS_ENABLED(CONFIG_MRP)
2061 struct mrp_port __rcu *mrp_port;
2065 const struct attribute_group *sysfs_groups[4];
2066 const struct attribute_group *sysfs_rx_queue_group;
2068 const struct rtnl_link_ops *rtnl_link_ops;
2070 /* for setting kernel sock attribute on TCP connection setup */
2071 #define GSO_MAX_SIZE 65536
2072 unsigned int gso_max_size;
2073 #define GSO_MAX_SEGS 65535
2077 const struct dcbnl_rtnl_ops *dcbnl_ops;
2080 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2081 u8 prio_tc_map[TC_BITMASK + 1];
2083 #if IS_ENABLED(CONFIG_FCOE)
2084 unsigned int fcoe_ddp_xid;
2086 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2087 struct netprio_map __rcu *priomap;
2089 struct phy_device *phydev;
2090 struct sfp_bus *sfp_bus;
2091 struct lock_class_key qdisc_tx_busylock_key;
2092 struct lock_class_key qdisc_running_key;
2093 struct lock_class_key qdisc_xmit_lock_key;
2094 struct lock_class_key addr_list_lock_key;
2096 unsigned wol_enabled:1;
2098 struct list_head net_notifier_list;
2100 #define to_net_dev(d) container_of(d, struct net_device, dev)
2102 static inline bool netif_elide_gro(const struct net_device *dev)
2104 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2109 #define NETDEV_ALIGN 32
2112 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2114 return dev->prio_tc_map[prio & TC_BITMASK];
2118 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2120 if (tc >= dev->num_tc)
2123 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2127 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2128 void netdev_reset_tc(struct net_device *dev);
2129 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2130 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2133 int netdev_get_num_tc(struct net_device *dev)
2138 void netdev_unbind_sb_channel(struct net_device *dev,
2139 struct net_device *sb_dev);
2140 int netdev_bind_sb_channel_queue(struct net_device *dev,
2141 struct net_device *sb_dev,
2142 u8 tc, u16 count, u16 offset);
2143 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2144 static inline int netdev_get_sb_channel(struct net_device *dev)
2146 return max_t(int, -dev->num_tc, 0);
2150 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2153 return &dev->_tx[index];
2156 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2157 const struct sk_buff *skb)
2159 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2162 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2163 void (*f)(struct net_device *,
2164 struct netdev_queue *,
2170 for (i = 0; i < dev->num_tx_queues; i++)
2171 f(dev, &dev->_tx[i], arg);
2174 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2175 struct net_device *sb_dev);
2176 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2177 struct sk_buff *skb,
2178 struct net_device *sb_dev);
2180 /* returns the headroom that the master device needs to take in account
2181 * when forwarding to this dev
2183 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2185 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2188 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2190 if (dev->netdev_ops->ndo_set_rx_headroom)
2191 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2194 /* set the device rx headroom to the dev's default */
2195 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2197 netdev_set_rx_headroom(dev, -1);
2201 * Net namespace inlines
2204 struct net *dev_net(const struct net_device *dev)
2206 return read_pnet(&dev->nd_net);
2210 void dev_net_set(struct net_device *dev, struct net *net)
2212 write_pnet(&dev->nd_net, net);
2216 * netdev_priv - access network device private data
2217 * @dev: network device
2219 * Get network device private data
2221 static inline void *netdev_priv(const struct net_device *dev)
2223 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2226 /* Set the sysfs physical device reference for the network logical device
2227 * if set prior to registration will cause a symlink during initialization.
2229 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2231 /* Set the sysfs device type for the network logical device to allow
2232 * fine-grained identification of different network device types. For
2233 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2235 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2237 /* Default NAPI poll() weight
2238 * Device drivers are strongly advised to not use bigger value
2240 #define NAPI_POLL_WEIGHT 64
2243 * netif_napi_add - initialize a NAPI context
2244 * @dev: network device
2245 * @napi: NAPI context
2246 * @poll: polling function
2247 * @weight: default weight
2249 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2250 * *any* of the other NAPI-related functions.
2252 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2253 int (*poll)(struct napi_struct *, int), int weight);
2256 * netif_tx_napi_add - initialize a NAPI context
2257 * @dev: network device
2258 * @napi: NAPI context
2259 * @poll: polling function
2260 * @weight: default weight
2262 * This variant of netif_napi_add() should be used from drivers using NAPI
2263 * to exclusively poll a TX queue.
2264 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2266 static inline void netif_tx_napi_add(struct net_device *dev,
2267 struct napi_struct *napi,
2268 int (*poll)(struct napi_struct *, int),
2271 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2272 netif_napi_add(dev, napi, poll, weight);
2276 * netif_napi_del - remove a NAPI context
2277 * @napi: NAPI context
2279 * netif_napi_del() removes a NAPI context from the network device NAPI list
2281 void netif_napi_del(struct napi_struct *napi);
2283 struct napi_gro_cb {
2284 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2287 /* Length of frag0. */
2288 unsigned int frag0_len;
2290 /* This indicates where we are processing relative to skb->data. */
2293 /* This is non-zero if the packet cannot be merged with the new skb. */
2296 /* Save the IP ID here and check when we get to the transport layer */
2299 /* Number of segments aggregated. */
2302 /* Start offset for remote checksum offload */
2303 u16 gro_remcsum_start;
2305 /* jiffies when first packet was created/queued */
2308 /* Used in ipv6_gro_receive() and foo-over-udp */
2311 /* This is non-zero if the packet may be of the same flow. */
2314 /* Used in tunnel GRO receive */
2317 /* GRO checksum is valid */
2320 /* Number of checksums via CHECKSUM_UNNECESSARY */
2325 #define NAPI_GRO_FREE 1
2326 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2328 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2331 /* Used in GRE, set in fou/gue_gro_receive */
2334 /* Used to determine if flush_id can be ignored */
2337 /* Number of gro_receive callbacks this packet already went through */
2338 u8 recursion_counter:4;
2340 /* GRO is done by frag_list pointer chaining. */
2343 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2346 /* used in skb_gro_receive() slow path */
2347 struct sk_buff *last;
2350 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2352 #define GRO_RECURSION_LIMIT 15
2353 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2355 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2358 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2359 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2360 struct list_head *head,
2361 struct sk_buff *skb)
2363 if (unlikely(gro_recursion_inc_test(skb))) {
2364 NAPI_GRO_CB(skb)->flush |= 1;
2368 return cb(head, skb);
2371 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2373 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2375 struct list_head *head,
2376 struct sk_buff *skb)
2378 if (unlikely(gro_recursion_inc_test(skb))) {
2379 NAPI_GRO_CB(skb)->flush |= 1;
2383 return cb(sk, head, skb);
2386 struct packet_type {
2387 __be16 type; /* This is really htons(ether_type). */
2388 bool ignore_outgoing;
2389 struct net_device *dev; /* NULL is wildcarded here */
2390 int (*func) (struct sk_buff *,
2391 struct net_device *,
2392 struct packet_type *,
2393 struct net_device *);
2394 void (*list_func) (struct list_head *,
2395 struct packet_type *,
2396 struct net_device *);
2397 bool (*id_match)(struct packet_type *ptype,
2399 void *af_packet_priv;
2400 struct list_head list;
2403 struct offload_callbacks {
2404 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2405 netdev_features_t features);
2406 struct sk_buff *(*gro_receive)(struct list_head *head,
2407 struct sk_buff *skb);
2408 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2411 struct packet_offload {
2412 __be16 type; /* This is really htons(ether_type). */
2414 struct offload_callbacks callbacks;
2415 struct list_head list;
2418 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2419 struct pcpu_sw_netstats {
2424 struct u64_stats_sync syncp;
2425 } __aligned(4 * sizeof(u64));
2427 struct pcpu_lstats {
2428 u64_stats_t packets;
2430 struct u64_stats_sync syncp;
2431 } __aligned(2 * sizeof(u64));
2433 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2435 static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2437 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2439 u64_stats_update_begin(&lstats->syncp);
2440 u64_stats_add(&lstats->bytes, len);
2441 u64_stats_inc(&lstats->packets);
2442 u64_stats_update_end(&lstats->syncp);
2445 #define __netdev_alloc_pcpu_stats(type, gfp) \
2447 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2450 for_each_possible_cpu(__cpu) { \
2451 typeof(type) *stat; \
2452 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2453 u64_stats_init(&stat->syncp); \
2459 #define netdev_alloc_pcpu_stats(type) \
2460 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2462 enum netdev_lag_tx_type {
2463 NETDEV_LAG_TX_TYPE_UNKNOWN,
2464 NETDEV_LAG_TX_TYPE_RANDOM,
2465 NETDEV_LAG_TX_TYPE_BROADCAST,
2466 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2467 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2468 NETDEV_LAG_TX_TYPE_HASH,
2471 enum netdev_lag_hash {
2472 NETDEV_LAG_HASH_NONE,
2474 NETDEV_LAG_HASH_L34,
2475 NETDEV_LAG_HASH_L23,
2476 NETDEV_LAG_HASH_E23,
2477 NETDEV_LAG_HASH_E34,
2478 NETDEV_LAG_HASH_UNKNOWN,
2481 struct netdev_lag_upper_info {
2482 enum netdev_lag_tx_type tx_type;
2483 enum netdev_lag_hash hash_type;
2486 struct netdev_lag_lower_state_info {
2491 #include <linux/notifier.h>
2493 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2494 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2498 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2500 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2501 detected a hardware crash and restarted
2502 - we can use this eg to kick tcp sessions
2504 NETDEV_CHANGE, /* Notify device state change */
2507 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2508 NETDEV_CHANGEADDR, /* notify after the address change */
2509 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2513 NETDEV_BONDING_FAILOVER,
2515 NETDEV_PRE_TYPE_CHANGE,
2516 NETDEV_POST_TYPE_CHANGE,
2519 NETDEV_NOTIFY_PEERS,
2523 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2524 NETDEV_CHANGEINFODATA,
2525 NETDEV_BONDING_INFO,
2526 NETDEV_PRECHANGEUPPER,
2527 NETDEV_CHANGELOWERSTATE,
2528 NETDEV_UDP_TUNNEL_PUSH_INFO,
2529 NETDEV_UDP_TUNNEL_DROP_INFO,
2530 NETDEV_CHANGE_TX_QUEUE_LEN,
2531 NETDEV_CVLAN_FILTER_PUSH_INFO,
2532 NETDEV_CVLAN_FILTER_DROP_INFO,
2533 NETDEV_SVLAN_FILTER_PUSH_INFO,
2534 NETDEV_SVLAN_FILTER_DROP_INFO,
2536 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2538 int register_netdevice_notifier(struct notifier_block *nb);
2539 int unregister_netdevice_notifier(struct notifier_block *nb);
2540 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2541 int unregister_netdevice_notifier_net(struct net *net,
2542 struct notifier_block *nb);
2543 int register_netdevice_notifier_dev_net(struct net_device *dev,
2544 struct notifier_block *nb,
2545 struct netdev_net_notifier *nn);
2546 int unregister_netdevice_notifier_dev_net(struct net_device *dev,
2547 struct notifier_block *nb,
2548 struct netdev_net_notifier *nn);
2550 struct netdev_notifier_info {
2551 struct net_device *dev;
2552 struct netlink_ext_ack *extack;
2555 struct netdev_notifier_info_ext {
2556 struct netdev_notifier_info info; /* must be first */
2562 struct netdev_notifier_change_info {
2563 struct netdev_notifier_info info; /* must be first */
2564 unsigned int flags_changed;
2567 struct netdev_notifier_changeupper_info {
2568 struct netdev_notifier_info info; /* must be first */
2569 struct net_device *upper_dev; /* new upper dev */
2570 bool master; /* is upper dev master */
2571 bool linking; /* is the notification for link or unlink */
2572 void *upper_info; /* upper dev info */
2575 struct netdev_notifier_changelowerstate_info {
2576 struct netdev_notifier_info info; /* must be first */
2577 void *lower_state_info; /* is lower dev state */
2580 struct netdev_notifier_pre_changeaddr_info {
2581 struct netdev_notifier_info info; /* must be first */
2582 const unsigned char *dev_addr;
2585 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2586 struct net_device *dev)
2589 info->extack = NULL;
2592 static inline struct net_device *
2593 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2598 static inline struct netlink_ext_ack *
2599 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2601 return info->extack;
2604 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2607 extern rwlock_t dev_base_lock; /* Device list lock */
2609 #define for_each_netdev(net, d) \
2610 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2611 #define for_each_netdev_reverse(net, d) \
2612 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2613 #define for_each_netdev_rcu(net, d) \
2614 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2615 #define for_each_netdev_safe(net, d, n) \
2616 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2617 #define for_each_netdev_continue(net, d) \
2618 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2619 #define for_each_netdev_continue_reverse(net, d) \
2620 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2622 #define for_each_netdev_continue_rcu(net, d) \
2623 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2624 #define for_each_netdev_in_bond_rcu(bond, slave) \
2625 for_each_netdev_rcu(&init_net, slave) \
2626 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2627 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2629 static inline struct net_device *next_net_device(struct net_device *dev)
2631 struct list_head *lh;
2635 lh = dev->dev_list.next;
2636 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2639 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2641 struct list_head *lh;
2645 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2646 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2649 static inline struct net_device *first_net_device(struct net *net)
2651 return list_empty(&net->dev_base_head) ? NULL :
2652 net_device_entry(net->dev_base_head.next);
2655 static inline struct net_device *first_net_device_rcu(struct net *net)
2657 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2659 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2662 int netdev_boot_setup_check(struct net_device *dev);
2663 unsigned long netdev_boot_base(const char *prefix, int unit);
2664 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2665 const char *hwaddr);
2666 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2667 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2668 void dev_add_pack(struct packet_type *pt);
2669 void dev_remove_pack(struct packet_type *pt);
2670 void __dev_remove_pack(struct packet_type *pt);
2671 void dev_add_offload(struct packet_offload *po);
2672 void dev_remove_offload(struct packet_offload *po);
2674 int dev_get_iflink(const struct net_device *dev);
2675 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2676 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2677 unsigned short mask);
2678 struct net_device *dev_get_by_name(struct net *net, const char *name);
2679 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2680 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2681 int dev_alloc_name(struct net_device *dev, const char *name);
2682 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2683 void dev_close(struct net_device *dev);
2684 void dev_close_many(struct list_head *head, bool unlink);
2685 void dev_disable_lro(struct net_device *dev);
2686 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2687 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2688 struct net_device *sb_dev);
2689 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2690 struct net_device *sb_dev);
2691 int dev_queue_xmit(struct sk_buff *skb);
2692 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2693 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2694 int register_netdevice(struct net_device *dev);
2695 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2696 void unregister_netdevice_many(struct list_head *head);
2697 static inline void unregister_netdevice(struct net_device *dev)
2699 unregister_netdevice_queue(dev, NULL);
2702 int netdev_refcnt_read(const struct net_device *dev);
2703 void free_netdev(struct net_device *dev);
2704 void netdev_freemem(struct net_device *dev);
2705 void synchronize_net(void);
2706 int init_dummy_netdev(struct net_device *dev);
2708 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2709 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2710 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2711 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2712 int netdev_get_name(struct net *net, char *name, int ifindex);
2713 int dev_restart(struct net_device *dev);
2714 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2715 int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
2717 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2719 return NAPI_GRO_CB(skb)->data_offset;
2722 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2724 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2727 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2729 NAPI_GRO_CB(skb)->data_offset += len;
2732 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2733 unsigned int offset)
2735 return NAPI_GRO_CB(skb)->frag0 + offset;
2738 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2740 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2743 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2745 NAPI_GRO_CB(skb)->frag0 = NULL;
2746 NAPI_GRO_CB(skb)->frag0_len = 0;
2749 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2750 unsigned int offset)
2752 if (!pskb_may_pull(skb, hlen))
2755 skb_gro_frag0_invalidate(skb);
2756 return skb->data + offset;
2759 static inline void *skb_gro_network_header(struct sk_buff *skb)
2761 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2762 skb_network_offset(skb);
2765 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2766 const void *start, unsigned int len)
2768 if (NAPI_GRO_CB(skb)->csum_valid)
2769 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2770 csum_partial(start, len, 0));
2773 /* GRO checksum functions. These are logical equivalents of the normal
2774 * checksum functions (in skbuff.h) except that they operate on the GRO
2775 * offsets and fields in sk_buff.
2778 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2780 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2782 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2785 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2789 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2790 skb_checksum_start_offset(skb) <
2791 skb_gro_offset(skb)) &&
2792 !skb_at_gro_remcsum_start(skb) &&
2793 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2794 (!zero_okay || check));
2797 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2800 if (NAPI_GRO_CB(skb)->csum_valid &&
2801 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2804 NAPI_GRO_CB(skb)->csum = psum;
2806 return __skb_gro_checksum_complete(skb);
2809 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2811 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2812 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2813 NAPI_GRO_CB(skb)->csum_cnt--;
2815 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2816 * verified a new top level checksum or an encapsulated one
2817 * during GRO. This saves work if we fallback to normal path.
2819 __skb_incr_checksum_unnecessary(skb);
2823 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2826 __sum16 __ret = 0; \
2827 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2828 __ret = __skb_gro_checksum_validate_complete(skb, \
2829 compute_pseudo(skb, proto)); \
2831 skb_gro_incr_csum_unnecessary(skb); \
2835 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2836 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2838 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2840 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2842 #define skb_gro_checksum_simple_validate(skb) \
2843 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2845 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2847 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2848 !NAPI_GRO_CB(skb)->csum_valid);
2851 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2854 NAPI_GRO_CB(skb)->csum = ~pseudo;
2855 NAPI_GRO_CB(skb)->csum_valid = 1;
2858 #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \
2860 if (__skb_gro_checksum_convert_check(skb)) \
2861 __skb_gro_checksum_convert(skb, \
2862 compute_pseudo(skb, proto)); \
2865 struct gro_remcsum {
2870 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2876 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2877 unsigned int off, size_t hdrlen,
2878 int start, int offset,
2879 struct gro_remcsum *grc,
2883 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2885 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2888 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2892 ptr = skb_gro_header_fast(skb, off);
2893 if (skb_gro_header_hard(skb, off + plen)) {
2894 ptr = skb_gro_header_slow(skb, off + plen, off);
2899 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2902 /* Adjust skb->csum since we changed the packet */
2903 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2905 grc->offset = off + hdrlen + offset;
2911 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2912 struct gro_remcsum *grc)
2915 size_t plen = grc->offset + sizeof(u16);
2920 ptr = skb_gro_header_fast(skb, grc->offset);
2921 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2922 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2927 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2930 #ifdef CONFIG_XFRM_OFFLOAD
2931 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2933 if (PTR_ERR(pp) != -EINPROGRESS)
2934 NAPI_GRO_CB(skb)->flush |= flush;
2936 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2939 struct gro_remcsum *grc)
2941 if (PTR_ERR(pp) != -EINPROGRESS) {
2942 NAPI_GRO_CB(skb)->flush |= flush;
2943 skb_gro_remcsum_cleanup(skb, grc);
2944 skb->remcsum_offload = 0;
2948 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2950 NAPI_GRO_CB(skb)->flush |= flush;
2952 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2955 struct gro_remcsum *grc)
2957 NAPI_GRO_CB(skb)->flush |= flush;
2958 skb_gro_remcsum_cleanup(skb, grc);
2959 skb->remcsum_offload = 0;
2963 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2964 unsigned short type,
2965 const void *daddr, const void *saddr,
2968 if (!dev->header_ops || !dev->header_ops->create)
2971 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2974 static inline int dev_parse_header(const struct sk_buff *skb,
2975 unsigned char *haddr)
2977 const struct net_device *dev = skb->dev;
2979 if (!dev->header_ops || !dev->header_ops->parse)
2981 return dev->header_ops->parse(skb, haddr);
2984 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2986 const struct net_device *dev = skb->dev;
2988 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2990 return dev->header_ops->parse_protocol(skb);
2993 /* ll_header must have at least hard_header_len allocated */
2994 static inline bool dev_validate_header(const struct net_device *dev,
2995 char *ll_header, int len)
2997 if (likely(len >= dev->hard_header_len))
2999 if (len < dev->min_header_len)
3002 if (capable(CAP_SYS_RAWIO)) {
3003 memset(ll_header + len, 0, dev->hard_header_len - len);
3007 if (dev->header_ops && dev->header_ops->validate)
3008 return dev->header_ops->validate(ll_header, len);
3013 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
3015 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
3016 static inline int unregister_gifconf(unsigned int family)
3018 return register_gifconf(family, NULL);
3021 #ifdef CONFIG_NET_FLOW_LIMIT
3022 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
3023 struct sd_flow_limit {
3025 unsigned int num_buckets;
3026 unsigned int history_head;
3027 u16 history[FLOW_LIMIT_HISTORY];
3031 extern int netdev_flow_limit_table_len;
3032 #endif /* CONFIG_NET_FLOW_LIMIT */
3035 * Incoming packets are placed on per-CPU queues
3037 struct softnet_data {
3038 struct list_head poll_list;
3039 struct sk_buff_head process_queue;
3042 unsigned int processed;
3043 unsigned int time_squeeze;
3044 unsigned int received_rps;
3046 struct softnet_data *rps_ipi_list;
3048 #ifdef CONFIG_NET_FLOW_LIMIT
3049 struct sd_flow_limit __rcu *flow_limit;
3051 struct Qdisc *output_queue;
3052 struct Qdisc **output_queue_tailp;
3053 struct sk_buff *completion_queue;
3054 #ifdef CONFIG_XFRM_OFFLOAD
3055 struct sk_buff_head xfrm_backlog;
3057 /* written and read only by owning cpu: */
3063 /* input_queue_head should be written by cpu owning this struct,
3064 * and only read by other cpus. Worth using a cache line.
3066 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3068 /* Elements below can be accessed between CPUs for RPS/RFS */
3069 call_single_data_t csd ____cacheline_aligned_in_smp;
3070 struct softnet_data *rps_ipi_next;
3072 unsigned int input_queue_tail;
3074 unsigned int dropped;
3075 struct sk_buff_head input_pkt_queue;
3076 struct napi_struct backlog;
3080 static inline void input_queue_head_incr(struct softnet_data *sd)
3083 sd->input_queue_head++;
3087 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3088 unsigned int *qtail)
3091 *qtail = ++sd->input_queue_tail;
3095 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3097 static inline int dev_recursion_level(void)
3099 return this_cpu_read(softnet_data.xmit.recursion);
3102 #define XMIT_RECURSION_LIMIT 10
3103 static inline bool dev_xmit_recursion(void)
3105 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3106 XMIT_RECURSION_LIMIT);
3109 static inline void dev_xmit_recursion_inc(void)
3111 __this_cpu_inc(softnet_data.xmit.recursion);
3114 static inline void dev_xmit_recursion_dec(void)
3116 __this_cpu_dec(softnet_data.xmit.recursion);
3119 void __netif_schedule(struct Qdisc *q);
3120 void netif_schedule_queue(struct netdev_queue *txq);
3122 static inline void netif_tx_schedule_all(struct net_device *dev)
3126 for (i = 0; i < dev->num_tx_queues; i++)
3127 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3130 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3132 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3136 * netif_start_queue - allow transmit
3137 * @dev: network device
3139 * Allow upper layers to call the device hard_start_xmit routine.
3141 static inline void netif_start_queue(struct net_device *dev)
3143 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3146 static inline void netif_tx_start_all_queues(struct net_device *dev)
3150 for (i = 0; i < dev->num_tx_queues; i++) {
3151 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3152 netif_tx_start_queue(txq);
3156 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3159 * netif_wake_queue - restart transmit
3160 * @dev: network device
3162 * Allow upper layers to call the device hard_start_xmit routine.
3163 * Used for flow control when transmit resources are available.
3165 static inline void netif_wake_queue(struct net_device *dev)
3167 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3170 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3174 for (i = 0; i < dev->num_tx_queues; i++) {
3175 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3176 netif_tx_wake_queue(txq);
3180 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3182 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3186 * netif_stop_queue - stop transmitted packets
3187 * @dev: network device
3189 * Stop upper layers calling the device hard_start_xmit routine.
3190 * Used for flow control when transmit resources are unavailable.
3192 static inline void netif_stop_queue(struct net_device *dev)
3194 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3197 void netif_tx_stop_all_queues(struct net_device *dev);
3198 void netdev_update_lockdep_key(struct net_device *dev);
3200 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3202 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3206 * netif_queue_stopped - test if transmit queue is flowblocked
3207 * @dev: network device
3209 * Test if transmit queue on device is currently unable to send.
3211 static inline bool netif_queue_stopped(const struct net_device *dev)
3213 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3216 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3218 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3222 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3224 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3228 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3230 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3234 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3235 * @dev_queue: pointer to transmit queue
3237 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3238 * to give appropriate hint to the CPU.
3240 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3243 prefetchw(&dev_queue->dql.num_queued);
3248 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3249 * @dev_queue: pointer to transmit queue
3251 * BQL enabled drivers might use this helper in their TX completion path,
3252 * to give appropriate hint to the CPU.
3254 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3257 prefetchw(&dev_queue->dql.limit);
3261 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3265 dql_queued(&dev_queue->dql, bytes);
3267 if (likely(dql_avail(&dev_queue->dql) >= 0))
3270 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3273 * The XOFF flag must be set before checking the dql_avail below,
3274 * because in netdev_tx_completed_queue we update the dql_completed
3275 * before checking the XOFF flag.
3279 /* check again in case another CPU has just made room avail */
3280 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3281 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3285 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3286 * that they should not test BQL status themselves.
3287 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3289 * Returns true if the doorbell must be used to kick the NIC.
3291 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3297 dql_queued(&dev_queue->dql, bytes);
3299 return netif_tx_queue_stopped(dev_queue);
3301 netdev_tx_sent_queue(dev_queue, bytes);
3306 * netdev_sent_queue - report the number of bytes queued to hardware
3307 * @dev: network device
3308 * @bytes: number of bytes queued to the hardware device queue
3310 * Report the number of bytes queued for sending/completion to the network
3311 * device hardware queue. @bytes should be a good approximation and should
3312 * exactly match netdev_completed_queue() @bytes
3314 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3316 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3319 static inline bool __netdev_sent_queue(struct net_device *dev,
3323 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3327 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3328 unsigned int pkts, unsigned int bytes)
3331 if (unlikely(!bytes))
3334 dql_completed(&dev_queue->dql, bytes);
3337 * Without the memory barrier there is a small possiblity that
3338 * netdev_tx_sent_queue will miss the update and cause the queue to
3339 * be stopped forever
3343 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3346 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3347 netif_schedule_queue(dev_queue);
3352 * netdev_completed_queue - report bytes and packets completed by device
3353 * @dev: network device
3354 * @pkts: actual number of packets sent over the medium
3355 * @bytes: actual number of bytes sent over the medium
3357 * Report the number of bytes and packets transmitted by the network device
3358 * hardware queue over the physical medium, @bytes must exactly match the
3359 * @bytes amount passed to netdev_sent_queue()
3361 static inline void netdev_completed_queue(struct net_device *dev,
3362 unsigned int pkts, unsigned int bytes)
3364 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3367 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3370 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3376 * netdev_reset_queue - reset the packets and bytes count of a network device
3377 * @dev_queue: network device
3379 * Reset the bytes and packet count of a network device and clear the
3380 * software flow control OFF bit for this network device
3382 static inline void netdev_reset_queue(struct net_device *dev_queue)
3384 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3388 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3389 * @dev: network device
3390 * @queue_index: given tx queue index
3392 * Returns 0 if given tx queue index >= number of device tx queues,
3393 * otherwise returns the originally passed tx queue index.
3395 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3397 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3398 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3399 dev->name, queue_index,
3400 dev->real_num_tx_queues);
3408 * netif_running - test if up
3409 * @dev: network device
3411 * Test if the device has been brought up.
3413 static inline bool netif_running(const struct net_device *dev)
3415 return test_bit(__LINK_STATE_START, &dev->state);
3419 * Routines to manage the subqueues on a device. We only need start,
3420 * stop, and a check if it's stopped. All other device management is
3421 * done at the overall netdevice level.
3422 * Also test the device if we're multiqueue.
3426 * netif_start_subqueue - allow sending packets on subqueue
3427 * @dev: network device
3428 * @queue_index: sub queue index
3430 * Start individual transmit queue of a device with multiple transmit queues.
3432 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3434 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3436 netif_tx_start_queue(txq);
3440 * netif_stop_subqueue - stop sending packets on subqueue
3441 * @dev: network device
3442 * @queue_index: sub queue index
3444 * Stop individual transmit queue of a device with multiple transmit queues.
3446 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3448 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3449 netif_tx_stop_queue(txq);
3453 * netif_subqueue_stopped - test status of subqueue
3454 * @dev: network device
3455 * @queue_index: sub queue index
3457 * Check individual transmit queue of a device with multiple transmit queues.
3459 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3462 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3464 return netif_tx_queue_stopped(txq);
3467 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3468 struct sk_buff *skb)
3470 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3474 * netif_wake_subqueue - allow sending packets on subqueue
3475 * @dev: network device
3476 * @queue_index: sub queue index
3478 * Resume individual transmit queue of a device with multiple transmit queues.
3480 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3482 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3484 netif_tx_wake_queue(txq);
3488 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3490 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3491 u16 index, bool is_rxqs_map);
3494 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3495 * @j: CPU/Rx queue index
3496 * @mask: bitmask of all cpus/rx queues
3497 * @nr_bits: number of bits in the bitmask
3499 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3501 static inline bool netif_attr_test_mask(unsigned long j,
3502 const unsigned long *mask,
3503 unsigned int nr_bits)
3505 cpu_max_bits_warn(j, nr_bits);
3506 return test_bit(j, mask);
3510 * netif_attr_test_online - Test for online CPU/Rx queue
3511 * @j: CPU/Rx queue index
3512 * @online_mask: bitmask for CPUs/Rx queues that are online
3513 * @nr_bits: number of bits in the bitmask
3515 * Returns true if a CPU/Rx queue is online.
3517 static inline bool netif_attr_test_online(unsigned long j,
3518 const unsigned long *online_mask,
3519 unsigned int nr_bits)
3521 cpu_max_bits_warn(j, nr_bits);
3524 return test_bit(j, online_mask);
3526 return (j < nr_bits);
3530 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3531 * @n: CPU/Rx queue index
3532 * @srcp: the cpumask/Rx queue mask pointer
3533 * @nr_bits: number of bits in the bitmask
3535 * Returns >= nr_bits if no further CPUs/Rx queues set.
3537 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3538 unsigned int nr_bits)
3540 /* -1 is a legal arg here. */
3542 cpu_max_bits_warn(n, nr_bits);
3545 return find_next_bit(srcp, nr_bits, n + 1);
3551 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3552 * @n: CPU/Rx queue index
3553 * @src1p: the first CPUs/Rx queues mask pointer
3554 * @src2p: the second CPUs/Rx queues mask pointer
3555 * @nr_bits: number of bits in the bitmask
3557 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3559 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3560 const unsigned long *src2p,
3561 unsigned int nr_bits)
3563 /* -1 is a legal arg here. */
3565 cpu_max_bits_warn(n, nr_bits);
3568 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3570 return find_next_bit(src1p, nr_bits, n + 1);
3572 return find_next_bit(src2p, nr_bits, n + 1);
3577 static inline int netif_set_xps_queue(struct net_device *dev,
3578 const struct cpumask *mask,
3584 static inline int __netif_set_xps_queue(struct net_device *dev,
3585 const unsigned long *mask,
3586 u16 index, bool is_rxqs_map)
3593 * netif_is_multiqueue - test if device has multiple transmit queues
3594 * @dev: network device
3596 * Check if device has multiple transmit queues
3598 static inline bool netif_is_multiqueue(const struct net_device *dev)
3600 return dev->num_tx_queues > 1;
3603 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3606 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3608 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3611 dev->real_num_rx_queues = rxqs;
3616 static inline struct netdev_rx_queue *
3617 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3619 return dev->_rx + rxq;
3623 static inline unsigned int get_netdev_rx_queue_index(
3624 struct netdev_rx_queue *queue)
3626 struct net_device *dev = queue->dev;
3627 int index = queue - dev->_rx;
3629 BUG_ON(index >= dev->num_rx_queues);
3634 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3635 int netif_get_num_default_rss_queues(void);
3637 enum skb_free_reason {
3638 SKB_REASON_CONSUMED,
3642 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3643 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3646 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3647 * interrupt context or with hardware interrupts being disabled.
3648 * (in_irq() || irqs_disabled())
3650 * We provide four helpers that can be used in following contexts :
3652 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3653 * replacing kfree_skb(skb)
3655 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3656 * Typically used in place of consume_skb(skb) in TX completion path
3658 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3659 * replacing kfree_skb(skb)
3661 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3662 * and consumed a packet. Used in place of consume_skb(skb)
3664 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3666 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3669 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3671 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3674 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3676 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3679 static inline void dev_consume_skb_any(struct sk_buff *skb)
3681 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3684 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3685 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3686 int netif_rx(struct sk_buff *skb);
3687 int netif_rx_ni(struct sk_buff *skb);
3688 int netif_receive_skb(struct sk_buff *skb);
3689 int netif_receive_skb_core(struct sk_buff *skb);
3690 void netif_receive_skb_list(struct list_head *head);
3691 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3692 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3693 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3694 gro_result_t napi_gro_frags(struct napi_struct *napi);
3695 struct packet_offload *gro_find_receive_by_type(__be16 type);
3696 struct packet_offload *gro_find_complete_by_type(__be16 type);
3698 static inline void napi_free_frags(struct napi_struct *napi)
3700 kfree_skb(napi->skb);
3704 bool netdev_is_rx_handler_busy(struct net_device *dev);
3705 int netdev_rx_handler_register(struct net_device *dev,
3706 rx_handler_func_t *rx_handler,
3707 void *rx_handler_data);
3708 void netdev_rx_handler_unregister(struct net_device *dev);
3710 bool dev_valid_name(const char *name);
3711 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3712 bool *need_copyout);
3713 int dev_ifconf(struct net *net, struct ifconf *, int);
3714 int dev_ethtool(struct net *net, struct ifreq *);
3715 unsigned int dev_get_flags(const struct net_device *);
3716 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3717 struct netlink_ext_ack *extack);
3718 int dev_change_flags(struct net_device *dev, unsigned int flags,
3719 struct netlink_ext_ack *extack);
3720 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3721 unsigned int gchanges);
3722 int dev_change_name(struct net_device *, const char *);
3723 int dev_set_alias(struct net_device *, const char *, size_t);
3724 int dev_get_alias(const struct net_device *, char *, size_t);
3725 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3726 int __dev_set_mtu(struct net_device *, int);
3727 int dev_validate_mtu(struct net_device *dev, int mtu,
3728 struct netlink_ext_ack *extack);
3729 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3730 struct netlink_ext_ack *extack);
3731 int dev_set_mtu(struct net_device *, int);
3732 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3733 void dev_set_group(struct net_device *, int);
3734 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3735 struct netlink_ext_ack *extack);
3736 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3737 struct netlink_ext_ack *extack);
3738 int dev_change_carrier(struct net_device *, bool new_carrier);
3739 int dev_get_phys_port_id(struct net_device *dev,
3740 struct netdev_phys_item_id *ppid);
3741 int dev_get_phys_port_name(struct net_device *dev,
3742 char *name, size_t len);
3743 int dev_get_port_parent_id(struct net_device *dev,
3744 struct netdev_phys_item_id *ppid, bool recurse);
3745 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3746 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3747 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3748 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3749 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3750 struct netdev_queue *txq, int *ret);
3752 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3753 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3755 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3756 enum bpf_netdev_command cmd);
3757 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3759 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3760 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3761 bool is_skb_forwardable(const struct net_device *dev,
3762 const struct sk_buff *skb);
3764 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3765 struct sk_buff *skb)
3767 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3768 unlikely(!is_skb_forwardable(dev, skb))) {
3769 atomic_long_inc(&dev->rx_dropped);
3774 skb_scrub_packet(skb, true);
3779 bool dev_nit_active(struct net_device *dev);
3780 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3782 extern int netdev_budget;
3783 extern unsigned int netdev_budget_usecs;
3785 /* Called by rtnetlink.c:rtnl_unlock() */
3786 void netdev_run_todo(void);
3789 * dev_put - release reference to device
3790 * @dev: network device
3792 * Release reference to device to allow it to be freed.
3794 static inline void dev_put(struct net_device *dev)
3796 this_cpu_dec(*dev->pcpu_refcnt);
3800 * dev_hold - get reference to device
3801 * @dev: network device
3803 * Hold reference to device to keep it from being freed.
3805 static inline void dev_hold(struct net_device *dev)
3807 this_cpu_inc(*dev->pcpu_refcnt);
3810 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3811 * and _off may be called from IRQ context, but it is caller
3812 * who is responsible for serialization of these calls.
3814 * The name carrier is inappropriate, these functions should really be
3815 * called netif_lowerlayer_*() because they represent the state of any
3816 * kind of lower layer not just hardware media.
3819 void linkwatch_init_dev(struct net_device *dev);
3820 void linkwatch_fire_event(struct net_device *dev);
3821 void linkwatch_forget_dev(struct net_device *dev);
3824 * netif_carrier_ok - test if carrier present
3825 * @dev: network device
3827 * Check if carrier is present on device
3829 static inline bool netif_carrier_ok(const struct net_device *dev)
3831 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3834 unsigned long dev_trans_start(struct net_device *dev);
3836 void __netdev_watchdog_up(struct net_device *dev);
3838 void netif_carrier_on(struct net_device *dev);
3840 void netif_carrier_off(struct net_device *dev);
3843 * netif_dormant_on - mark device as dormant.
3844 * @dev: network device
3846 * Mark device as dormant (as per RFC2863).
3848 * The dormant state indicates that the relevant interface is not
3849 * actually in a condition to pass packets (i.e., it is not 'up') but is
3850 * in a "pending" state, waiting for some external event. For "on-
3851 * demand" interfaces, this new state identifies the situation where the
3852 * interface is waiting for events to place it in the up state.
3854 static inline void netif_dormant_on(struct net_device *dev)
3856 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3857 linkwatch_fire_event(dev);
3861 * netif_dormant_off - set device as not dormant.
3862 * @dev: network device
3864 * Device is not in dormant state.
3866 static inline void netif_dormant_off(struct net_device *dev)
3868 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3869 linkwatch_fire_event(dev);
3873 * netif_dormant - test if device is dormant
3874 * @dev: network device
3876 * Check if device is dormant.
3878 static inline bool netif_dormant(const struct net_device *dev)
3880 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3885 * netif_oper_up - test if device is operational
3886 * @dev: network device
3888 * Check if carrier is operational
3890 static inline bool netif_oper_up(const struct net_device *dev)
3892 return (dev->operstate == IF_OPER_UP ||
3893 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3897 * netif_device_present - is device available or removed
3898 * @dev: network device
3900 * Check if device has not been removed from system.
3902 static inline bool netif_device_present(struct net_device *dev)
3904 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3907 void netif_device_detach(struct net_device *dev);
3909 void netif_device_attach(struct net_device *dev);
3912 * Network interface message level settings
3917 NETIF_MSG_PROBE_BIT,
3919 NETIF_MSG_TIMER_BIT,
3920 NETIF_MSG_IFDOWN_BIT,
3922 NETIF_MSG_RX_ERR_BIT,
3923 NETIF_MSG_TX_ERR_BIT,
3924 NETIF_MSG_TX_QUEUED_BIT,
3926 NETIF_MSG_TX_DONE_BIT,
3927 NETIF_MSG_RX_STATUS_BIT,
3928 NETIF_MSG_PKTDATA_BIT,
3932 /* When you add a new bit above, update netif_msg_class_names array
3933 * in net/ethtool/common.c
3935 NETIF_MSG_CLASS_COUNT,
3937 /* Both ethtool_ops interface and internal driver implementation use u32 */
3938 static_assert(NETIF_MSG_CLASS_COUNT <= 32);
3940 #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))
3941 #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)
3943 #define NETIF_MSG_DRV __NETIF_MSG(DRV)
3944 #define NETIF_MSG_PROBE __NETIF_MSG(PROBE)
3945 #define NETIF_MSG_LINK __NETIF_MSG(LINK)
3946 #define NETIF_MSG_TIMER __NETIF_MSG(TIMER)
3947 #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)
3948 #define NETIF_MSG_IFUP __NETIF_MSG(IFUP)
3949 #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)
3950 #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)
3951 #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)
3952 #define NETIF_MSG_INTR __NETIF_MSG(INTR)
3953 #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)
3954 #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)
3955 #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)
3956 #define NETIF_MSG_HW __NETIF_MSG(HW)
3957 #define NETIF_MSG_WOL __NETIF_MSG(WOL)
3959 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3960 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3961 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3962 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3963 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3964 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3965 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3966 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3967 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3968 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3969 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3970 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3971 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3972 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3973 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3975 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3978 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3979 return default_msg_enable_bits;
3980 if (debug_value == 0) /* no output */
3982 /* set low N bits */
3983 return (1U << debug_value) - 1;
3986 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3988 spin_lock(&txq->_xmit_lock);
3989 txq->xmit_lock_owner = cpu;
3992 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3994 __acquire(&txq->_xmit_lock);
3998 static inline void __netif_tx_release(struct netdev_queue *txq)
4000 __release(&txq->_xmit_lock);
4003 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
4005 spin_lock_bh(&txq->_xmit_lock);
4006 txq->xmit_lock_owner = smp_processor_id();
4009 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
4011 bool ok = spin_trylock(&txq->_xmit_lock);
4013 txq->xmit_lock_owner = smp_processor_id();
4017 static inline void __netif_tx_unlock(struct netdev_queue *txq)
4019 txq->xmit_lock_owner = -1;
4020 spin_unlock(&txq->_xmit_lock);
4023 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
4025 txq->xmit_lock_owner = -1;
4026 spin_unlock_bh(&txq->_xmit_lock);
4029 static inline void txq_trans_update(struct netdev_queue *txq)
4031 if (txq->xmit_lock_owner != -1)
4032 txq->trans_start = jiffies;
4035 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
4036 static inline void netif_trans_update(struct net_device *dev)
4038 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
4040 if (txq->trans_start != jiffies)
4041 txq->trans_start = jiffies;
4045 * netif_tx_lock - grab network device transmit lock
4046 * @dev: network device
4048 * Get network device transmit lock
4050 static inline void netif_tx_lock(struct net_device *dev)
4055 spin_lock(&dev->tx_global_lock);
4056 cpu = smp_processor_id();
4057 for (i = 0; i < dev->num_tx_queues; i++) {
4058 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4060 /* We are the only thread of execution doing a
4061 * freeze, but we have to grab the _xmit_lock in
4062 * order to synchronize with threads which are in
4063 * the ->hard_start_xmit() handler and already
4064 * checked the frozen bit.
4066 __netif_tx_lock(txq, cpu);
4067 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
4068 __netif_tx_unlock(txq);
4072 static inline void netif_tx_lock_bh(struct net_device *dev)
4078 static inline void netif_tx_unlock(struct net_device *dev)
4082 for (i = 0; i < dev->num_tx_queues; i++) {
4083 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4085 /* No need to grab the _xmit_lock here. If the
4086 * queue is not stopped for another reason, we
4089 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4090 netif_schedule_queue(txq);
4092 spin_unlock(&dev->tx_global_lock);
4095 static inline void netif_tx_unlock_bh(struct net_device *dev)
4097 netif_tx_unlock(dev);
4101 #define HARD_TX_LOCK(dev, txq, cpu) { \
4102 if ((dev->features & NETIF_F_LLTX) == 0) { \
4103 __netif_tx_lock(txq, cpu); \
4105 __netif_tx_acquire(txq); \
4109 #define HARD_TX_TRYLOCK(dev, txq) \
4110 (((dev->features & NETIF_F_LLTX) == 0) ? \
4111 __netif_tx_trylock(txq) : \
4112 __netif_tx_acquire(txq))
4114 #define HARD_TX_UNLOCK(dev, txq) { \
4115 if ((dev->features & NETIF_F_LLTX) == 0) { \
4116 __netif_tx_unlock(txq); \
4118 __netif_tx_release(txq); \
4122 static inline void netif_tx_disable(struct net_device *dev)
4128 cpu = smp_processor_id();
4129 for (i = 0; i < dev->num_tx_queues; i++) {
4130 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4132 __netif_tx_lock(txq, cpu);
4133 netif_tx_stop_queue(txq);
4134 __netif_tx_unlock(txq);
4139 static inline void netif_addr_lock(struct net_device *dev)
4141 spin_lock(&dev->addr_list_lock);
4144 static inline void netif_addr_lock_bh(struct net_device *dev)
4146 spin_lock_bh(&dev->addr_list_lock);
4149 static inline void netif_addr_unlock(struct net_device *dev)
4151 spin_unlock(&dev->addr_list_lock);
4154 static inline void netif_addr_unlock_bh(struct net_device *dev)
4156 spin_unlock_bh(&dev->addr_list_lock);
4160 * dev_addrs walker. Should be used only for read access. Call with
4161 * rcu_read_lock held.
4163 #define for_each_dev_addr(dev, ha) \
4164 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4166 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4168 void ether_setup(struct net_device *dev);
4170 /* Support for loadable net-drivers */
4171 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4172 unsigned char name_assign_type,
4173 void (*setup)(struct net_device *),
4174 unsigned int txqs, unsigned int rxqs);
4175 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4176 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4178 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4179 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4182 int register_netdev(struct net_device *dev);
4183 void unregister_netdev(struct net_device *dev);
4185 /* General hardware address lists handling functions */
4186 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4187 struct netdev_hw_addr_list *from_list, int addr_len);
4188 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4189 struct netdev_hw_addr_list *from_list, int addr_len);
4190 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4191 struct net_device *dev,
4192 int (*sync)(struct net_device *, const unsigned char *),
4193 int (*unsync)(struct net_device *,
4194 const unsigned char *));
4195 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4196 struct net_device *dev,
4197 int (*sync)(struct net_device *,
4198 const unsigned char *, int),
4199 int (*unsync)(struct net_device *,
4200 const unsigned char *, int));
4201 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4202 struct net_device *dev,
4203 int (*unsync)(struct net_device *,
4204 const unsigned char *, int));
4205 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4206 struct net_device *dev,
4207 int (*unsync)(struct net_device *,
4208 const unsigned char *));
4209 void __hw_addr_init(struct netdev_hw_addr_list *list);
4211 /* Functions used for device addresses handling */
4212 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4213 unsigned char addr_type);
4214 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4215 unsigned char addr_type);
4216 void dev_addr_flush(struct net_device *dev);
4217 int dev_addr_init(struct net_device *dev);
4219 /* Functions used for unicast addresses handling */
4220 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4221 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4222 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4223 int dev_uc_sync(struct net_device *to, struct net_device *from);
4224 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4225 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4226 void dev_uc_flush(struct net_device *dev);
4227 void dev_uc_init(struct net_device *dev);
4230 * __dev_uc_sync - Synchonize device's unicast list
4231 * @dev: device to sync
4232 * @sync: function to call if address should be added
4233 * @unsync: function to call if address should be removed
4235 * Add newly added addresses to the interface, and release
4236 * addresses that have been deleted.
4238 static inline int __dev_uc_sync(struct net_device *dev,
4239 int (*sync)(struct net_device *,
4240 const unsigned char *),
4241 int (*unsync)(struct net_device *,
4242 const unsigned char *))
4244 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4248 * __dev_uc_unsync - Remove synchronized addresses from device
4249 * @dev: device to sync
4250 * @unsync: function to call if address should be removed
4252 * Remove all addresses that were added to the device by dev_uc_sync().
4254 static inline void __dev_uc_unsync(struct net_device *dev,
4255 int (*unsync)(struct net_device *,
4256 const unsigned char *))
4258 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4261 /* Functions used for multicast addresses handling */
4262 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4263 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4264 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4265 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4266 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4267 int dev_mc_sync(struct net_device *to, struct net_device *from);
4268 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4269 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4270 void dev_mc_flush(struct net_device *dev);
4271 void dev_mc_init(struct net_device *dev);
4274 * __dev_mc_sync - Synchonize device's multicast list
4275 * @dev: device to sync
4276 * @sync: function to call if address should be added
4277 * @unsync: function to call if address should be removed
4279 * Add newly added addresses to the interface, and release
4280 * addresses that have been deleted.
4282 static inline int __dev_mc_sync(struct net_device *dev,
4283 int (*sync)(struct net_device *,
4284 const unsigned char *),
4285 int (*unsync)(struct net_device *,
4286 const unsigned char *))
4288 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4292 * __dev_mc_unsync - Remove synchronized addresses from device
4293 * @dev: device to sync
4294 * @unsync: function to call if address should be removed
4296 * Remove all addresses that were added to the device by dev_mc_sync().
4298 static inline void __dev_mc_unsync(struct net_device *dev,
4299 int (*unsync)(struct net_device *,
4300 const unsigned char *))
4302 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4305 /* Functions used for secondary unicast and multicast support */
4306 void dev_set_rx_mode(struct net_device *dev);
4307 void __dev_set_rx_mode(struct net_device *dev);
4308 int dev_set_promiscuity(struct net_device *dev, int inc);
4309 int dev_set_allmulti(struct net_device *dev, int inc);
4310 void netdev_state_change(struct net_device *dev);
4311 void netdev_notify_peers(struct net_device *dev);
4312 void netdev_features_change(struct net_device *dev);
4313 /* Load a device via the kmod */
4314 void dev_load(struct net *net, const char *name);
4315 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4316 struct rtnl_link_stats64 *storage);
4317 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4318 const struct net_device_stats *netdev_stats);
4320 extern int netdev_max_backlog;
4321 extern int netdev_tstamp_prequeue;
4322 extern int weight_p;
4323 extern int dev_weight_rx_bias;
4324 extern int dev_weight_tx_bias;
4325 extern int dev_rx_weight;
4326 extern int dev_tx_weight;
4327 extern int gro_normal_batch;
4329 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4330 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4331 struct list_head **iter);
4332 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4333 struct list_head **iter);
4335 /* iterate through upper list, must be called under RCU read lock */
4336 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4337 for (iter = &(dev)->adj_list.upper, \
4338 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4340 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4342 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4343 int (*fn)(struct net_device *upper_dev,
4347 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4348 struct net_device *upper_dev);
4350 bool netdev_has_any_upper_dev(struct net_device *dev);
4352 void *netdev_lower_get_next_private(struct net_device *dev,
4353 struct list_head **iter);
4354 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4355 struct list_head **iter);
4357 #define netdev_for_each_lower_private(dev, priv, iter) \
4358 for (iter = (dev)->adj_list.lower.next, \
4359 priv = netdev_lower_get_next_private(dev, &(iter)); \
4361 priv = netdev_lower_get_next_private(dev, &(iter)))
4363 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4364 for (iter = &(dev)->adj_list.lower, \
4365 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4367 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4369 void *netdev_lower_get_next(struct net_device *dev,
4370 struct list_head **iter);
4372 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4373 for (iter = (dev)->adj_list.lower.next, \
4374 ldev = netdev_lower_get_next(dev, &(iter)); \
4376 ldev = netdev_lower_get_next(dev, &(iter)))
4378 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4379 struct list_head **iter);
4380 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4381 struct list_head **iter);
4383 int netdev_walk_all_lower_dev(struct net_device *dev,
4384 int (*fn)(struct net_device *lower_dev,
4387 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4388 int (*fn)(struct net_device *lower_dev,
4392 void *netdev_adjacent_get_private(struct list_head *adj_list);
4393 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4394 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4395 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4396 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4397 struct netlink_ext_ack *extack);
4398 int netdev_master_upper_dev_link(struct net_device *dev,
4399 struct net_device *upper_dev,
4400 void *upper_priv, void *upper_info,
4401 struct netlink_ext_ack *extack);
4402 void netdev_upper_dev_unlink(struct net_device *dev,
4403 struct net_device *upper_dev);
4404 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4405 struct net_device *new_dev,
4406 struct net_device *dev,
4407 struct netlink_ext_ack *extack);
4408 void netdev_adjacent_change_commit(struct net_device *old_dev,
4409 struct net_device *new_dev,
4410 struct net_device *dev);
4411 void netdev_adjacent_change_abort(struct net_device *old_dev,
4412 struct net_device *new_dev,
4413 struct net_device *dev);
4414 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4415 void *netdev_lower_dev_get_private(struct net_device *dev,
4416 struct net_device *lower_dev);
4417 void netdev_lower_state_changed(struct net_device *lower_dev,
4418 void *lower_state_info);
4420 /* RSS keys are 40 or 52 bytes long */
4421 #define NETDEV_RSS_KEY_LEN 52
4422 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4423 void netdev_rss_key_fill(void *buffer, size_t len);
4425 int skb_checksum_help(struct sk_buff *skb);
4426 int skb_crc32c_csum_help(struct sk_buff *skb);
4427 int skb_csum_hwoffload_help(struct sk_buff *skb,
4428 const netdev_features_t features);
4430 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4431 netdev_features_t features, bool tx_path);
4432 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4433 netdev_features_t features);
4435 struct netdev_bonding_info {
4440 struct netdev_notifier_bonding_info {
4441 struct netdev_notifier_info info; /* must be first */
4442 struct netdev_bonding_info bonding_info;
4445 void netdev_bonding_info_change(struct net_device *dev,
4446 struct netdev_bonding_info *bonding_info);
4448 #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
4449 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
4451 static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
4458 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4460 return __skb_gso_segment(skb, features, true);
4462 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4464 static inline bool can_checksum_protocol(netdev_features_t features,
4467 if (protocol == htons(ETH_P_FCOE))
4468 return !!(features & NETIF_F_FCOE_CRC);
4470 /* Assume this is an IP checksum (not SCTP CRC) */
4472 if (features & NETIF_F_HW_CSUM) {
4473 /* Can checksum everything */
4478 case htons(ETH_P_IP):
4479 return !!(features & NETIF_F_IP_CSUM);
4480 case htons(ETH_P_IPV6):
4481 return !!(features & NETIF_F_IPV6_CSUM);
4488 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4490 static inline void netdev_rx_csum_fault(struct net_device *dev,
4491 struct sk_buff *skb)
4495 /* rx skb timestamps */
4496 void net_enable_timestamp(void);
4497 void net_disable_timestamp(void);
4499 #ifdef CONFIG_PROC_FS
4500 int __init dev_proc_init(void);
4502 #define dev_proc_init() 0
4505 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4506 struct sk_buff *skb, struct net_device *dev,
4509 __this_cpu_write(softnet_data.xmit.more, more);
4510 return ops->ndo_start_xmit(skb, dev);
4513 static inline bool netdev_xmit_more(void)
4515 return __this_cpu_read(softnet_data.xmit.more);
4518 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4519 struct netdev_queue *txq, bool more)
4521 const struct net_device_ops *ops = dev->netdev_ops;
4524 rc = __netdev_start_xmit(ops, skb, dev, more);
4525 if (rc == NETDEV_TX_OK)
4526 txq_trans_update(txq);
4531 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4533 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4536 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4538 return netdev_class_create_file_ns(class_attr, NULL);
4541 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4543 netdev_class_remove_file_ns(class_attr, NULL);
4546 extern const struct kobj_ns_type_operations net_ns_type_operations;
4548 const char *netdev_drivername(const struct net_device *dev);
4550 void linkwatch_run_queue(void);
4552 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4553 netdev_features_t f2)
4555 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4556 if (f1 & NETIF_F_HW_CSUM)
4557 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4559 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4565 static inline netdev_features_t netdev_get_wanted_features(
4566 struct net_device *dev)
4568 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4570 netdev_features_t netdev_increment_features(netdev_features_t all,
4571 netdev_features_t one, netdev_features_t mask);
4573 /* Allow TSO being used on stacked device :
4574 * Performing the GSO segmentation before last device
4575 * is a performance improvement.
4577 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4578 netdev_features_t mask)
4580 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4583 int __netdev_update_features(struct net_device *dev);
4584 void netdev_update_features(struct net_device *dev);
4585 void netdev_change_features(struct net_device *dev);
4587 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4588 struct net_device *dev);
4590 netdev_features_t passthru_features_check(struct sk_buff *skb,
4591 struct net_device *dev,
4592 netdev_features_t features);
4593 netdev_features_t netif_skb_features(struct sk_buff *skb);
4595 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4597 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4599 /* check flags correspondence */
4600 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4601 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4602 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4603 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4604 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4605 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4606 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4607 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4608 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4609 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4610 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4611 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4612 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4613 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4614 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4615 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4616 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4617 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4618 BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));
4620 return (features & feature) == feature;
4623 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4625 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4626 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4629 static inline bool netif_needs_gso(struct sk_buff *skb,
4630 netdev_features_t features)
4632 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4633 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4634 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4637 static inline void netif_set_gso_max_size(struct net_device *dev,
4640 dev->gso_max_size = size;
4643 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4644 int pulled_hlen, u16 mac_offset,
4647 skb->protocol = protocol;
4648 skb->encapsulation = 1;
4649 skb_push(skb, pulled_hlen);
4650 skb_reset_transport_header(skb);
4651 skb->mac_header = mac_offset;
4652 skb->network_header = skb->mac_header + mac_len;
4653 skb->mac_len = mac_len;
4656 static inline bool netif_is_macsec(const struct net_device *dev)
4658 return dev->priv_flags & IFF_MACSEC;
4661 static inline bool netif_is_macvlan(const struct net_device *dev)
4663 return dev->priv_flags & IFF_MACVLAN;
4666 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4668 return dev->priv_flags & IFF_MACVLAN_PORT;
4671 static inline bool netif_is_bond_master(const struct net_device *dev)
4673 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4676 static inline bool netif_is_bond_slave(const struct net_device *dev)
4678 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4681 static inline bool netif_supports_nofcs(struct net_device *dev)
4683 return dev->priv_flags & IFF_SUPP_NOFCS;
4686 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4688 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4691 static inline bool netif_is_l3_master(const struct net_device *dev)
4693 return dev->priv_flags & IFF_L3MDEV_MASTER;
4696 static inline bool netif_is_l3_slave(const struct net_device *dev)
4698 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4701 static inline bool netif_is_bridge_master(const struct net_device *dev)
4703 return dev->priv_flags & IFF_EBRIDGE;
4706 static inline bool netif_is_bridge_port(const struct net_device *dev)
4708 return dev->priv_flags & IFF_BRIDGE_PORT;
4711 static inline bool netif_is_ovs_master(const struct net_device *dev)
4713 return dev->priv_flags & IFF_OPENVSWITCH;
4716 static inline bool netif_is_ovs_port(const struct net_device *dev)
4718 return dev->priv_flags & IFF_OVS_DATAPATH;
4721 static inline bool netif_is_team_master(const struct net_device *dev)
4723 return dev->priv_flags & IFF_TEAM;
4726 static inline bool netif_is_team_port(const struct net_device *dev)
4728 return dev->priv_flags & IFF_TEAM_PORT;
4731 static inline bool netif_is_lag_master(const struct net_device *dev)
4733 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4736 static inline bool netif_is_lag_port(const struct net_device *dev)
4738 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4741 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4743 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4746 static inline bool netif_is_failover(const struct net_device *dev)
4748 return dev->priv_flags & IFF_FAILOVER;
4751 static inline bool netif_is_failover_slave(const struct net_device *dev)
4753 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4756 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4757 static inline void netif_keep_dst(struct net_device *dev)
4759 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4762 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4763 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4765 /* TODO: reserve and use an additional IFF bit, if we get more users */
4766 return dev->priv_flags & IFF_MACSEC;
4769 extern struct pernet_operations __net_initdata loopback_net_ops;
4771 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4773 /* netdev_printk helpers, similar to dev_printk */
4775 static inline const char *netdev_name(const struct net_device *dev)
4777 if (!dev->name[0] || strchr(dev->name, '%'))
4778 return "(unnamed net_device)";
4782 static inline bool netdev_unregistering(const struct net_device *dev)
4784 return dev->reg_state == NETREG_UNREGISTERING;
4787 static inline const char *netdev_reg_state(const struct net_device *dev)
4789 switch (dev->reg_state) {
4790 case NETREG_UNINITIALIZED: return " (uninitialized)";
4791 case NETREG_REGISTERED: return "";
4792 case NETREG_UNREGISTERING: return " (unregistering)";
4793 case NETREG_UNREGISTERED: return " (unregistered)";
4794 case NETREG_RELEASED: return " (released)";
4795 case NETREG_DUMMY: return " (dummy)";
4798 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4799 return " (unknown)";
4802 __printf(3, 4) __cold
4803 void netdev_printk(const char *level, const struct net_device *dev,
4804 const char *format, ...);
4805 __printf(2, 3) __cold
4806 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4807 __printf(2, 3) __cold
4808 void netdev_alert(const struct net_device *dev, const char *format, ...);
4809 __printf(2, 3) __cold
4810 void netdev_crit(const struct net_device *dev, const char *format, ...);
4811 __printf(2, 3) __cold
4812 void netdev_err(const struct net_device *dev, const char *format, ...);
4813 __printf(2, 3) __cold
4814 void netdev_warn(const struct net_device *dev, const char *format, ...);
4815 __printf(2, 3) __cold
4816 void netdev_notice(const struct net_device *dev, const char *format, ...);
4817 __printf(2, 3) __cold
4818 void netdev_info(const struct net_device *dev, const char *format, ...);
4820 #define netdev_level_once(level, dev, fmt, ...) \
4822 static bool __print_once __read_mostly; \
4824 if (!__print_once) { \
4825 __print_once = true; \
4826 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4830 #define netdev_emerg_once(dev, fmt, ...) \
4831 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4832 #define netdev_alert_once(dev, fmt, ...) \
4833 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4834 #define netdev_crit_once(dev, fmt, ...) \
4835 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4836 #define netdev_err_once(dev, fmt, ...) \
4837 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4838 #define netdev_warn_once(dev, fmt, ...) \
4839 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4840 #define netdev_notice_once(dev, fmt, ...) \
4841 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4842 #define netdev_info_once(dev, fmt, ...) \
4843 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4845 #define MODULE_ALIAS_NETDEV(device) \
4846 MODULE_ALIAS("netdev-" device)
4848 #if defined(CONFIG_DYNAMIC_DEBUG)
4849 #define netdev_dbg(__dev, format, args...) \
4851 dynamic_netdev_dbg(__dev, format, ##args); \
4853 #elif defined(DEBUG)
4854 #define netdev_dbg(__dev, format, args...) \
4855 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4857 #define netdev_dbg(__dev, format, args...) \
4860 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4864 #if defined(VERBOSE_DEBUG)
4865 #define netdev_vdbg netdev_dbg
4868 #define netdev_vdbg(dev, format, args...) \
4871 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4877 * netdev_WARN() acts like dev_printk(), but with the key difference
4878 * of using a WARN/WARN_ON to get the message out, including the
4879 * file/line information and a backtrace.
4881 #define netdev_WARN(dev, format, args...) \
4882 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4883 netdev_reg_state(dev), ##args)
4885 #define netdev_WARN_ONCE(dev, format, args...) \
4886 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4887 netdev_reg_state(dev), ##args)
4889 /* netif printk helpers, similar to netdev_printk */
4891 #define netif_printk(priv, type, level, dev, fmt, args...) \
4893 if (netif_msg_##type(priv)) \
4894 netdev_printk(level, (dev), fmt, ##args); \
4897 #define netif_level(level, priv, type, dev, fmt, args...) \
4899 if (netif_msg_##type(priv)) \
4900 netdev_##level(dev, fmt, ##args); \
4903 #define netif_emerg(priv, type, dev, fmt, args...) \
4904 netif_level(emerg, priv, type, dev, fmt, ##args)
4905 #define netif_alert(priv, type, dev, fmt, args...) \
4906 netif_level(alert, priv, type, dev, fmt, ##args)
4907 #define netif_crit(priv, type, dev, fmt, args...) \
4908 netif_level(crit, priv, type, dev, fmt, ##args)
4909 #define netif_err(priv, type, dev, fmt, args...) \
4910 netif_level(err, priv, type, dev, fmt, ##args)
4911 #define netif_warn(priv, type, dev, fmt, args...) \
4912 netif_level(warn, priv, type, dev, fmt, ##args)
4913 #define netif_notice(priv, type, dev, fmt, args...) \
4914 netif_level(notice, priv, type, dev, fmt, ##args)
4915 #define netif_info(priv, type, dev, fmt, args...) \
4916 netif_level(info, priv, type, dev, fmt, ##args)
4918 #if defined(CONFIG_DYNAMIC_DEBUG)
4919 #define netif_dbg(priv, type, netdev, format, args...) \
4921 if (netif_msg_##type(priv)) \
4922 dynamic_netdev_dbg(netdev, format, ##args); \
4924 #elif defined(DEBUG)
4925 #define netif_dbg(priv, type, dev, format, args...) \
4926 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4928 #define netif_dbg(priv, type, dev, format, args...) \
4931 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4936 /* if @cond then downgrade to debug, else print at @level */
4937 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4940 netif_dbg(priv, type, netdev, fmt, ##args); \
4942 netif_ ## level(priv, type, netdev, fmt, ##args); \
4945 #if defined(VERBOSE_DEBUG)
4946 #define netif_vdbg netif_dbg
4948 #define netif_vdbg(priv, type, dev, format, args...) \
4951 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4957 * The list of packet types we will receive (as opposed to discard)
4958 * and the routines to invoke.
4960 * Why 16. Because with 16 the only overlap we get on a hash of the
4961 * low nibble of the protocol value is RARP/SNAP/X.25.
4975 #define PTYPE_HASH_SIZE (16)
4976 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4978 extern struct net_device *blackhole_netdev;
4980 #endif /* _LINUX_NETDEVICE_H */