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,
855 /* These structures hold the attributes of bpf state that are being passed
856 * to the netdevice through the bpf op.
858 enum bpf_netdev_command {
859 /* Set or clear a bpf program used in the earliest stages of packet
860 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
861 * is responsible for calling bpf_prog_put on any old progs that are
862 * stored. In case of error, the callee need not release the new prog
863 * reference, but on success it takes ownership and must bpf_prog_put
864 * when it is no longer used.
870 /* BPF program for offload callbacks, invoked at program load time. */
871 BPF_OFFLOAD_MAP_ALLOC,
872 BPF_OFFLOAD_MAP_FREE,
876 struct bpf_prog_offload_ops;
877 struct netlink_ext_ack;
881 enum bpf_netdev_command command;
886 struct bpf_prog *prog;
887 struct netlink_ext_ack *extack;
889 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
892 /* flags with which program was installed */
895 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
897 struct bpf_offloaded_map *offmap;
899 /* XDP_SETUP_XSK_UMEM */
901 struct xdp_umem *umem;
907 /* Flags for ndo_xsk_wakeup. */
908 #define XDP_WAKEUP_RX (1 << 0)
909 #define XDP_WAKEUP_TX (1 << 1)
911 #ifdef CONFIG_XFRM_OFFLOAD
913 int (*xdo_dev_state_add) (struct xfrm_state *x);
914 void (*xdo_dev_state_delete) (struct xfrm_state *x);
915 void (*xdo_dev_state_free) (struct xfrm_state *x);
916 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
917 struct xfrm_state *x);
918 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
923 struct rcu_head rcuhead;
930 struct netdev_name_node {
931 struct hlist_node hlist;
932 struct list_head list;
933 struct net_device *dev;
937 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
938 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
941 * This structure defines the management hooks for network devices.
942 * The following hooks can be defined; unless noted otherwise, they are
943 * optional and can be filled with a null pointer.
945 * int (*ndo_init)(struct net_device *dev);
946 * This function is called once when a network device is registered.
947 * The network device can use this for any late stage initialization
948 * or semantic validation. It can fail with an error code which will
949 * be propagated back to register_netdev.
951 * void (*ndo_uninit)(struct net_device *dev);
952 * This function is called when device is unregistered or when registration
953 * fails. It is not called if init fails.
955 * int (*ndo_open)(struct net_device *dev);
956 * This function is called when a network device transitions to the up
959 * int (*ndo_stop)(struct net_device *dev);
960 * This function is called when a network device transitions to the down
963 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
964 * struct net_device *dev);
965 * Called when a packet needs to be transmitted.
966 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
967 * the queue before that can happen; it's for obsolete devices and weird
968 * corner cases, but the stack really does a non-trivial amount
969 * of useless work if you return NETDEV_TX_BUSY.
970 * Required; cannot be NULL.
972 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
973 * struct net_device *dev
974 * netdev_features_t features);
975 * Called by core transmit path to determine if device is capable of
976 * performing offload operations on a given packet. This is to give
977 * the device an opportunity to implement any restrictions that cannot
978 * be otherwise expressed by feature flags. The check is called with
979 * the set of features that the stack has calculated and it returns
980 * those the driver believes to be appropriate.
982 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
983 * struct net_device *sb_dev);
984 * Called to decide which queue to use when device supports multiple
987 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
988 * This function is called to allow device receiver to make
989 * changes to configuration when multicast or promiscuous is enabled.
991 * void (*ndo_set_rx_mode)(struct net_device *dev);
992 * This function is called device changes address list filtering.
993 * If driver handles unicast address filtering, it should set
994 * IFF_UNICAST_FLT in its priv_flags.
996 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
997 * This function is called when the Media Access Control address
998 * needs to be changed. If this interface is not defined, the
999 * MAC address can not be changed.
1001 * int (*ndo_validate_addr)(struct net_device *dev);
1002 * Test if Media Access Control address is valid for the device.
1004 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1005 * Called when a user requests an ioctl which can't be handled by
1006 * the generic interface code. If not defined ioctls return
1007 * not supported error code.
1009 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1010 * Used to set network devices bus interface parameters. This interface
1011 * is retained for legacy reasons; new devices should use the bus
1012 * interface (PCI) for low level management.
1014 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1015 * Called when a user wants to change the Maximum Transfer Unit
1018 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
1019 * Callback used when the transmitter has not made any progress
1020 * for dev->watchdog ticks.
1022 * void (*ndo_get_stats64)(struct net_device *dev,
1023 * struct rtnl_link_stats64 *storage);
1024 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1025 * Called when a user wants to get the network device usage
1026 * statistics. Drivers must do one of the following:
1027 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1028 * rtnl_link_stats64 structure passed by the caller.
1029 * 2. Define @ndo_get_stats to update a net_device_stats structure
1030 * (which should normally be dev->stats) and return a pointer to
1031 * it. The structure may be changed asynchronously only if each
1032 * field is written atomically.
1033 * 3. Update dev->stats asynchronously and atomically, and define
1034 * neither operation.
1036 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1037 * Return true if this device supports offload stats of this attr_id.
1039 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1041 * Get statistics for offload operations by attr_id. Write it into the
1042 * attr_data pointer.
1044 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1045 * If device supports VLAN filtering this function is called when a
1046 * VLAN id is registered.
1048 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1049 * If device supports VLAN filtering this function is called when a
1050 * VLAN id is unregistered.
1052 * void (*ndo_poll_controller)(struct net_device *dev);
1054 * SR-IOV management functions.
1055 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1056 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1057 * u8 qos, __be16 proto);
1058 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1060 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1061 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1062 * int (*ndo_get_vf_config)(struct net_device *dev,
1063 * int vf, struct ifla_vf_info *ivf);
1064 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1065 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1066 * struct nlattr *port[]);
1068 * Enable or disable the VF ability to query its RSS Redirection Table and
1069 * Hash Key. This is needed since on some devices VF share this information
1070 * with PF and querying it may introduce a theoretical security risk.
1071 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1072 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1073 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1075 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1076 * This is always called from the stack with the rtnl lock held and netif
1077 * tx queues stopped. This allows the netdevice to perform queue
1078 * management safely.
1080 * Fiber Channel over Ethernet (FCoE) offload functions.
1081 * int (*ndo_fcoe_enable)(struct net_device *dev);
1082 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1083 * so the underlying device can perform whatever needed configuration or
1084 * initialization to support acceleration of FCoE traffic.
1086 * int (*ndo_fcoe_disable)(struct net_device *dev);
1087 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1088 * so the underlying device can perform whatever needed clean-ups to
1089 * stop supporting acceleration of FCoE traffic.
1091 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1092 * struct scatterlist *sgl, unsigned int sgc);
1093 * Called when the FCoE Initiator wants to initialize an I/O that
1094 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1095 * perform necessary setup and returns 1 to indicate the device is set up
1096 * successfully to perform DDP on this I/O, otherwise this returns 0.
1098 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1099 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1100 * indicated by the FC exchange id 'xid', so the underlying device can
1101 * clean up and reuse resources for later DDP requests.
1103 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1104 * struct scatterlist *sgl, unsigned int sgc);
1105 * Called when the FCoE Target wants to initialize an I/O that
1106 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1107 * perform necessary setup and returns 1 to indicate the device is set up
1108 * successfully to perform DDP on this I/O, otherwise this returns 0.
1110 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1111 * struct netdev_fcoe_hbainfo *hbainfo);
1112 * Called when the FCoE Protocol stack wants information on the underlying
1113 * device. This information is utilized by the FCoE protocol stack to
1114 * register attributes with Fiber Channel management service as per the
1115 * FC-GS Fabric Device Management Information(FDMI) specification.
1117 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1118 * Called when the underlying device wants to override default World Wide
1119 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1120 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1121 * protocol stack to use.
1124 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1125 * u16 rxq_index, u32 flow_id);
1126 * Set hardware filter for RFS. rxq_index is the target queue index;
1127 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1128 * Return the filter ID on success, or a negative error code.
1130 * Slave management functions (for bridge, bonding, etc).
1131 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1132 * Called to make another netdev an underling.
1134 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1135 * Called to release previously enslaved netdev.
1137 * Feature/offload setting functions.
1138 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1139 * netdev_features_t features);
1140 * Adjusts the requested feature flags according to device-specific
1141 * constraints, and returns the resulting flags. Must not modify
1144 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1145 * Called to update device configuration to new features. Passed
1146 * feature set might be less than what was returned by ndo_fix_features()).
1147 * Must return >0 or -errno if it changed dev->features itself.
1149 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1150 * struct net_device *dev,
1151 * const unsigned char *addr, u16 vid, u16 flags,
1152 * struct netlink_ext_ack *extack);
1153 * Adds an FDB entry to dev for addr.
1154 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1155 * struct net_device *dev,
1156 * const unsigned char *addr, u16 vid)
1157 * Deletes the FDB entry from dev coresponding to addr.
1158 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1159 * struct net_device *dev, struct net_device *filter_dev,
1161 * Used to add FDB entries to dump requests. Implementers should add
1162 * entries to skb and update idx with the number of entries.
1164 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1165 * u16 flags, struct netlink_ext_ack *extack)
1166 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1167 * struct net_device *dev, u32 filter_mask,
1169 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1172 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1173 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1174 * which do not represent real hardware may define this to allow their
1175 * userspace components to manage their virtual carrier state. Devices
1176 * that determine carrier state from physical hardware properties (eg
1177 * network cables) or protocol-dependent mechanisms (eg
1178 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1180 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1181 * struct netdev_phys_item_id *ppid);
1182 * Called to get ID of physical port of this device. If driver does
1183 * not implement this, it is assumed that the hw is not able to have
1184 * multiple net devices on single physical port.
1186 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1187 * struct netdev_phys_item_id *ppid)
1188 * Called to get the parent ID of the physical port of this device.
1190 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1191 * struct udp_tunnel_info *ti);
1192 * Called by UDP tunnel to notify a driver about the UDP port and socket
1193 * address family that a UDP tunnel is listnening to. It is called only
1194 * when a new port starts listening. The operation is protected by the
1197 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1198 * struct udp_tunnel_info *ti);
1199 * Called by UDP tunnel to notify the driver about a UDP port and socket
1200 * address family that the UDP tunnel is not listening to anymore. The
1201 * operation is protected by the RTNL.
1203 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1204 * struct net_device *dev)
1205 * Called by upper layer devices to accelerate switching or other
1206 * station functionality into hardware. 'pdev is the lowerdev
1207 * to use for the offload and 'dev' is the net device that will
1208 * back the offload. Returns a pointer to the private structure
1209 * the upper layer will maintain.
1210 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1211 * Called by upper layer device to delete the station created
1212 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1213 * the station and priv is the structure returned by the add
1215 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1216 * int queue_index, u32 maxrate);
1217 * Called when a user wants to set a max-rate limitation of specific
1219 * int (*ndo_get_iflink)(const struct net_device *dev);
1220 * Called to get the iflink value of this device.
1221 * void (*ndo_change_proto_down)(struct net_device *dev,
1223 * This function is used to pass protocol port error state information
1224 * to the switch driver. The switch driver can react to the proto_down
1225 * by doing a phys down on the associated switch port.
1226 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1227 * This function is used to get egress tunnel information for given skb.
1228 * This is useful for retrieving outer tunnel header parameters while
1230 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1231 * This function is used to specify the headroom that the skb must
1232 * consider when allocation skb during packet reception. Setting
1233 * appropriate rx headroom value allows avoiding skb head copy on
1234 * forward. Setting a negative value resets the rx headroom to the
1236 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1237 * This function is used to set or query state related to XDP on the
1238 * netdevice and manage BPF offload. See definition of
1239 * enum bpf_netdev_command for details.
1240 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1242 * This function is used to submit @n XDP packets for transmit on a
1243 * netdevice. Returns number of frames successfully transmitted, frames
1244 * that got dropped are freed/returned via xdp_return_frame().
1245 * Returns negative number, means general error invoking ndo, meaning
1246 * no frames were xmit'ed and core-caller will free all frames.
1247 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1248 * This function is used to wake up the softirq, ksoftirqd or kthread
1249 * responsible for sending and/or receiving packets on a specific
1250 * queue id bound to an AF_XDP socket. The flags field specifies if
1251 * only RX, only Tx, or both should be woken up using the flags
1252 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1253 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1254 * Get devlink port instance associated with a given netdev.
1255 * Called with a reference on the netdevice and devlink locks only,
1256 * rtnl_lock is not held.
1258 struct net_device_ops {
1259 int (*ndo_init)(struct net_device *dev);
1260 void (*ndo_uninit)(struct net_device *dev);
1261 int (*ndo_open)(struct net_device *dev);
1262 int (*ndo_stop)(struct net_device *dev);
1263 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1264 struct net_device *dev);
1265 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1266 struct net_device *dev,
1267 netdev_features_t features);
1268 u16 (*ndo_select_queue)(struct net_device *dev,
1269 struct sk_buff *skb,
1270 struct net_device *sb_dev);
1271 void (*ndo_change_rx_flags)(struct net_device *dev,
1273 void (*ndo_set_rx_mode)(struct net_device *dev);
1274 int (*ndo_set_mac_address)(struct net_device *dev,
1276 int (*ndo_validate_addr)(struct net_device *dev);
1277 int (*ndo_do_ioctl)(struct net_device *dev,
1278 struct ifreq *ifr, int cmd);
1279 int (*ndo_set_config)(struct net_device *dev,
1281 int (*ndo_change_mtu)(struct net_device *dev,
1283 int (*ndo_neigh_setup)(struct net_device *dev,
1284 struct neigh_parms *);
1285 void (*ndo_tx_timeout) (struct net_device *dev,
1286 unsigned int txqueue);
1288 void (*ndo_get_stats64)(struct net_device *dev,
1289 struct rtnl_link_stats64 *storage);
1290 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1291 int (*ndo_get_offload_stats)(int attr_id,
1292 const struct net_device *dev,
1294 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1296 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1297 __be16 proto, u16 vid);
1298 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1299 __be16 proto, u16 vid);
1300 #ifdef CONFIG_NET_POLL_CONTROLLER
1301 void (*ndo_poll_controller)(struct net_device *dev);
1302 int (*ndo_netpoll_setup)(struct net_device *dev,
1303 struct netpoll_info *info);
1304 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1306 int (*ndo_set_vf_mac)(struct net_device *dev,
1307 int queue, u8 *mac);
1308 int (*ndo_set_vf_vlan)(struct net_device *dev,
1309 int queue, u16 vlan,
1310 u8 qos, __be16 proto);
1311 int (*ndo_set_vf_rate)(struct net_device *dev,
1312 int vf, int min_tx_rate,
1314 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1315 int vf, bool setting);
1316 int (*ndo_set_vf_trust)(struct net_device *dev,
1317 int vf, bool setting);
1318 int (*ndo_get_vf_config)(struct net_device *dev,
1320 struct ifla_vf_info *ivf);
1321 int (*ndo_set_vf_link_state)(struct net_device *dev,
1322 int vf, int link_state);
1323 int (*ndo_get_vf_stats)(struct net_device *dev,
1325 struct ifla_vf_stats
1327 int (*ndo_set_vf_port)(struct net_device *dev,
1329 struct nlattr *port[]);
1330 int (*ndo_get_vf_port)(struct net_device *dev,
1331 int vf, struct sk_buff *skb);
1332 int (*ndo_get_vf_guid)(struct net_device *dev,
1334 struct ifla_vf_guid *node_guid,
1335 struct ifla_vf_guid *port_guid);
1336 int (*ndo_set_vf_guid)(struct net_device *dev,
1339 int (*ndo_set_vf_rss_query_en)(
1340 struct net_device *dev,
1341 int vf, bool setting);
1342 int (*ndo_setup_tc)(struct net_device *dev,
1343 enum tc_setup_type type,
1345 #if IS_ENABLED(CONFIG_FCOE)
1346 int (*ndo_fcoe_enable)(struct net_device *dev);
1347 int (*ndo_fcoe_disable)(struct net_device *dev);
1348 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1350 struct scatterlist *sgl,
1352 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1354 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1356 struct scatterlist *sgl,
1358 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1359 struct netdev_fcoe_hbainfo *hbainfo);
1362 #if IS_ENABLED(CONFIG_LIBFCOE)
1363 #define NETDEV_FCOE_WWNN 0
1364 #define NETDEV_FCOE_WWPN 1
1365 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1366 u64 *wwn, int type);
1369 #ifdef CONFIG_RFS_ACCEL
1370 int (*ndo_rx_flow_steer)(struct net_device *dev,
1371 const struct sk_buff *skb,
1375 int (*ndo_add_slave)(struct net_device *dev,
1376 struct net_device *slave_dev,
1377 struct netlink_ext_ack *extack);
1378 int (*ndo_del_slave)(struct net_device *dev,
1379 struct net_device *slave_dev);
1380 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1381 netdev_features_t features);
1382 int (*ndo_set_features)(struct net_device *dev,
1383 netdev_features_t features);
1384 int (*ndo_neigh_construct)(struct net_device *dev,
1385 struct neighbour *n);
1386 void (*ndo_neigh_destroy)(struct net_device *dev,
1387 struct neighbour *n);
1389 int (*ndo_fdb_add)(struct ndmsg *ndm,
1390 struct nlattr *tb[],
1391 struct net_device *dev,
1392 const unsigned char *addr,
1395 struct netlink_ext_ack *extack);
1396 int (*ndo_fdb_del)(struct ndmsg *ndm,
1397 struct nlattr *tb[],
1398 struct net_device *dev,
1399 const unsigned char *addr,
1401 int (*ndo_fdb_dump)(struct sk_buff *skb,
1402 struct netlink_callback *cb,
1403 struct net_device *dev,
1404 struct net_device *filter_dev,
1406 int (*ndo_fdb_get)(struct sk_buff *skb,
1407 struct nlattr *tb[],
1408 struct net_device *dev,
1409 const unsigned char *addr,
1410 u16 vid, u32 portid, u32 seq,
1411 struct netlink_ext_ack *extack);
1412 int (*ndo_bridge_setlink)(struct net_device *dev,
1413 struct nlmsghdr *nlh,
1415 struct netlink_ext_ack *extack);
1416 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1418 struct net_device *dev,
1421 int (*ndo_bridge_dellink)(struct net_device *dev,
1422 struct nlmsghdr *nlh,
1424 int (*ndo_change_carrier)(struct net_device *dev,
1426 int (*ndo_get_phys_port_id)(struct net_device *dev,
1427 struct netdev_phys_item_id *ppid);
1428 int (*ndo_get_port_parent_id)(struct net_device *dev,
1429 struct netdev_phys_item_id *ppid);
1430 int (*ndo_get_phys_port_name)(struct net_device *dev,
1431 char *name, size_t len);
1432 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1433 struct udp_tunnel_info *ti);
1434 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1435 struct udp_tunnel_info *ti);
1436 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1437 struct net_device *dev);
1438 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1441 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1444 int (*ndo_get_iflink)(const struct net_device *dev);
1445 int (*ndo_change_proto_down)(struct net_device *dev,
1447 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1448 struct sk_buff *skb);
1449 void (*ndo_set_rx_headroom)(struct net_device *dev,
1450 int needed_headroom);
1451 int (*ndo_bpf)(struct net_device *dev,
1452 struct netdev_bpf *bpf);
1453 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1454 struct xdp_frame **xdp,
1456 int (*ndo_xsk_wakeup)(struct net_device *dev,
1457 u32 queue_id, u32 flags);
1458 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1462 * enum net_device_priv_flags - &struct net_device priv_flags
1464 * These are the &struct net_device, they are only set internally
1465 * by drivers and used in the kernel. These flags are invisible to
1466 * userspace; this means that the order of these flags can change
1467 * during any kernel release.
1469 * You should have a pretty good reason to be extending these flags.
1471 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1472 * @IFF_EBRIDGE: Ethernet bridging device
1473 * @IFF_BONDING: bonding master or slave
1474 * @IFF_ISATAP: ISATAP interface (RFC4214)
1475 * @IFF_WAN_HDLC: WAN HDLC device
1476 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1478 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1479 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1480 * @IFF_MACVLAN_PORT: device used as macvlan port
1481 * @IFF_BRIDGE_PORT: device used as bridge port
1482 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1483 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1484 * @IFF_UNICAST_FLT: Supports unicast filtering
1485 * @IFF_TEAM_PORT: device used as team port
1486 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1487 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1488 * change when it's running
1489 * @IFF_MACVLAN: Macvlan device
1490 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1491 * underlying stacked devices
1492 * @IFF_L3MDEV_MASTER: device is an L3 master device
1493 * @IFF_NO_QUEUE: device can run without qdisc attached
1494 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1495 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1496 * @IFF_TEAM: device is a team device
1497 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1498 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1499 * entity (i.e. the master device for bridged veth)
1500 * @IFF_MACSEC: device is a MACsec device
1501 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1502 * @IFF_FAILOVER: device is a failover master device
1503 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1504 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1505 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1507 enum netdev_priv_flags {
1508 IFF_802_1Q_VLAN = 1<<0,
1512 IFF_WAN_HDLC = 1<<4,
1513 IFF_XMIT_DST_RELEASE = 1<<5,
1514 IFF_DONT_BRIDGE = 1<<6,
1515 IFF_DISABLE_NETPOLL = 1<<7,
1516 IFF_MACVLAN_PORT = 1<<8,
1517 IFF_BRIDGE_PORT = 1<<9,
1518 IFF_OVS_DATAPATH = 1<<10,
1519 IFF_TX_SKB_SHARING = 1<<11,
1520 IFF_UNICAST_FLT = 1<<12,
1521 IFF_TEAM_PORT = 1<<13,
1522 IFF_SUPP_NOFCS = 1<<14,
1523 IFF_LIVE_ADDR_CHANGE = 1<<15,
1524 IFF_MACVLAN = 1<<16,
1525 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1526 IFF_L3MDEV_MASTER = 1<<18,
1527 IFF_NO_QUEUE = 1<<19,
1528 IFF_OPENVSWITCH = 1<<20,
1529 IFF_L3MDEV_SLAVE = 1<<21,
1531 IFF_RXFH_CONFIGURED = 1<<23,
1532 IFF_PHONY_HEADROOM = 1<<24,
1534 IFF_NO_RX_HANDLER = 1<<26,
1535 IFF_FAILOVER = 1<<27,
1536 IFF_FAILOVER_SLAVE = 1<<28,
1537 IFF_L3MDEV_RX_HANDLER = 1<<29,
1538 IFF_LIVE_RENAME_OK = 1<<30,
1541 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1542 #define IFF_EBRIDGE IFF_EBRIDGE
1543 #define IFF_BONDING IFF_BONDING
1544 #define IFF_ISATAP IFF_ISATAP
1545 #define IFF_WAN_HDLC IFF_WAN_HDLC
1546 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1547 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1548 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1549 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1550 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1551 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1552 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1553 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1554 #define IFF_TEAM_PORT IFF_TEAM_PORT
1555 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1556 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1557 #define IFF_MACVLAN IFF_MACVLAN
1558 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1559 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1560 #define IFF_NO_QUEUE IFF_NO_QUEUE
1561 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1562 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1563 #define IFF_TEAM IFF_TEAM
1564 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1565 #define IFF_MACSEC IFF_MACSEC
1566 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1567 #define IFF_FAILOVER IFF_FAILOVER
1568 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1569 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1570 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1573 * struct net_device - The DEVICE structure.
1575 * Actually, this whole structure is a big mistake. It mixes I/O
1576 * data with strictly "high-level" data, and it has to know about
1577 * almost every data structure used in the INET module.
1579 * @name: This is the first field of the "visible" part of this structure
1580 * (i.e. as seen by users in the "Space.c" file). It is the name
1583 * @name_node: Name hashlist node
1584 * @ifalias: SNMP alias
1585 * @mem_end: Shared memory end
1586 * @mem_start: Shared memory start
1587 * @base_addr: Device I/O address
1588 * @irq: Device IRQ number
1590 * @state: Generic network queuing layer state, see netdev_state_t
1591 * @dev_list: The global list of network devices
1592 * @napi_list: List entry used for polling NAPI devices
1593 * @unreg_list: List entry when we are unregistering the
1594 * device; see the function unregister_netdev
1595 * @close_list: List entry used when we are closing the device
1596 * @ptype_all: Device-specific packet handlers for all protocols
1597 * @ptype_specific: Device-specific, protocol-specific packet handlers
1599 * @adj_list: Directly linked devices, like slaves for bonding
1600 * @features: Currently active device features
1601 * @hw_features: User-changeable features
1603 * @wanted_features: User-requested features
1604 * @vlan_features: Mask of features inheritable by VLAN devices
1606 * @hw_enc_features: Mask of features inherited by encapsulating devices
1607 * This field indicates what encapsulation
1608 * offloads the hardware is capable of doing,
1609 * and drivers will need to set them appropriately.
1611 * @mpls_features: Mask of features inheritable by MPLS
1613 * @ifindex: interface index
1614 * @group: The group the device belongs to
1616 * @stats: Statistics struct, which was left as a legacy, use
1617 * rtnl_link_stats64 instead
1619 * @rx_dropped: Dropped packets by core network,
1620 * do not use this in drivers
1621 * @tx_dropped: Dropped packets by core network,
1622 * do not use this in drivers
1623 * @rx_nohandler: nohandler dropped packets by core network on
1624 * inactive devices, do not use this in drivers
1625 * @carrier_up_count: Number of times the carrier has been up
1626 * @carrier_down_count: Number of times the carrier has been down
1628 * @wireless_handlers: List of functions to handle Wireless Extensions,
1630 * see <net/iw_handler.h> for details.
1631 * @wireless_data: Instance data managed by the core of wireless extensions
1633 * @netdev_ops: Includes several pointers to callbacks,
1634 * if one wants to override the ndo_*() functions
1635 * @ethtool_ops: Management operations
1636 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1637 * discovery handling. Necessary for e.g. 6LoWPAN.
1638 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1639 * of Layer 2 headers.
1641 * @flags: Interface flags (a la BSD)
1642 * @priv_flags: Like 'flags' but invisible to userspace,
1643 * see if.h for the definitions
1644 * @gflags: Global flags ( kept as legacy )
1645 * @padded: How much padding added by alloc_netdev()
1646 * @operstate: RFC2863 operstate
1647 * @link_mode: Mapping policy to operstate
1648 * @if_port: Selectable AUI, TP, ...
1650 * @mtu: Interface MTU value
1651 * @min_mtu: Interface Minimum MTU value
1652 * @max_mtu: Interface Maximum MTU value
1653 * @type: Interface hardware type
1654 * @hard_header_len: Maximum hardware header length.
1655 * @min_header_len: Minimum hardware header length
1657 * @needed_headroom: Extra headroom the hardware may need, but not in all
1658 * cases can this be guaranteed
1659 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1660 * cases can this be guaranteed. Some cases also use
1661 * LL_MAX_HEADER instead to allocate the skb
1663 * interface address info:
1665 * @perm_addr: Permanent hw address
1666 * @addr_assign_type: Hw address assignment type
1667 * @addr_len: Hardware address length
1668 * @upper_level: Maximum depth level of upper devices.
1669 * @lower_level: Maximum depth level of lower devices.
1670 * @neigh_priv_len: Used in neigh_alloc()
1671 * @dev_id: Used to differentiate devices that share
1672 * the same link layer address
1673 * @dev_port: Used to differentiate devices that share
1675 * @addr_list_lock: XXX: need comments on this one
1676 * @uc_promisc: Counter that indicates promiscuous mode
1677 * has been enabled due to the need to listen to
1678 * additional unicast addresses in a device that
1679 * does not implement ndo_set_rx_mode()
1680 * @uc: unicast mac addresses
1681 * @mc: multicast mac addresses
1682 * @dev_addrs: list of device hw addresses
1683 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1684 * @promiscuity: Number of times the NIC is told to work in
1685 * promiscuous mode; if it becomes 0 the NIC will
1686 * exit promiscuous mode
1687 * @allmulti: Counter, enables or disables allmulticast mode
1689 * @vlan_info: VLAN info
1690 * @dsa_ptr: dsa specific data
1691 * @tipc_ptr: TIPC specific data
1692 * @atalk_ptr: AppleTalk link
1693 * @ip_ptr: IPv4 specific data
1694 * @dn_ptr: DECnet specific data
1695 * @ip6_ptr: IPv6 specific data
1696 * @ax25_ptr: AX.25 specific data
1697 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1699 * @dev_addr: Hw address (before bcast,
1700 * because most packets are unicast)
1702 * @_rx: Array of RX queues
1703 * @num_rx_queues: Number of RX queues
1704 * allocated at register_netdev() time
1705 * @real_num_rx_queues: Number of RX queues currently active in device
1707 * @rx_handler: handler for received packets
1708 * @rx_handler_data: XXX: need comments on this one
1709 * @miniq_ingress: ingress/clsact qdisc specific data for
1710 * ingress processing
1711 * @ingress_queue: XXX: need comments on this one
1712 * @nf_hooks_ingress: netfilter hooks executed for ingress packets
1713 * @broadcast: hw bcast address
1715 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1716 * indexed by RX queue number. Assigned by driver.
1717 * This must only be set if the ndo_rx_flow_steer
1718 * operation is defined
1719 * @index_hlist: Device index hash chain
1721 * @_tx: Array of TX queues
1722 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1723 * @real_num_tx_queues: Number of TX queues currently active in device
1724 * @qdisc: Root qdisc from userspace point of view
1725 * @tx_queue_len: Max frames per queue allowed
1726 * @tx_global_lock: XXX: need comments on this one
1728 * @xps_maps: XXX: need comments on this one
1729 * @miniq_egress: clsact qdisc specific data for
1731 * @watchdog_timeo: Represents the timeout that is used by
1732 * the watchdog (see dev_watchdog())
1733 * @watchdog_timer: List of timers
1735 * @pcpu_refcnt: Number of references to this device
1736 * @todo_list: Delayed register/unregister
1737 * @link_watch_list: XXX: need comments on this one
1739 * @reg_state: Register/unregister state machine
1740 * @dismantle: Device is going to be freed
1741 * @rtnl_link_state: This enum represents the phases of creating
1744 * @needs_free_netdev: Should unregister perform free_netdev?
1745 * @priv_destructor: Called from unregister
1746 * @npinfo: XXX: need comments on this one
1747 * @nd_net: Network namespace this network device is inside
1749 * @ml_priv: Mid-layer private
1750 * @lstats: Loopback statistics
1751 * @tstats: Tunnel statistics
1752 * @dstats: Dummy statistics
1753 * @vstats: Virtual ethernet statistics
1758 * @dev: Class/net/name entry
1759 * @sysfs_groups: Space for optional device, statistics and wireless
1762 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1763 * @rtnl_link_ops: Rtnl_link_ops
1765 * @gso_max_size: Maximum size of generic segmentation offload
1766 * @gso_max_segs: Maximum number of segments that can be passed to the
1769 * @dcbnl_ops: Data Center Bridging netlink ops
1770 * @num_tc: Number of traffic classes in the net device
1771 * @tc_to_txq: XXX: need comments on this one
1772 * @prio_tc_map: XXX: need comments on this one
1774 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1776 * @priomap: XXX: need comments on this one
1777 * @phydev: Physical device may attach itself
1778 * for hardware timestamping
1779 * @sfp_bus: attached &struct sfp_bus structure.
1780 * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
1782 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1783 * @qdisc_xmit_lock_key: lockdep class annotating
1784 * netdev_queue->_xmit_lock spinlock
1785 * @addr_list_lock_key: lockdep class annotating
1786 * net_device->addr_list_lock spinlock
1788 * @proto_down: protocol port state information can be sent to the
1789 * switch driver and used to set the phys state of the
1792 * @wol_enabled: Wake-on-LAN is enabled
1794 * FIXME: cleanup struct net_device such that network protocol info
1799 char name[IFNAMSIZ];
1800 struct netdev_name_node *name_node;
1801 struct dev_ifalias __rcu *ifalias;
1803 * I/O specific fields
1804 * FIXME: Merge these and struct ifmap into one
1806 unsigned long mem_end;
1807 unsigned long mem_start;
1808 unsigned long base_addr;
1812 * Some hardware also needs these fields (state,dev_list,
1813 * napi_list,unreg_list,close_list) but they are not
1814 * part of the usual set specified in Space.c.
1817 unsigned long state;
1819 struct list_head dev_list;
1820 struct list_head napi_list;
1821 struct list_head unreg_list;
1822 struct list_head close_list;
1823 struct list_head ptype_all;
1824 struct list_head ptype_specific;
1827 struct list_head upper;
1828 struct list_head lower;
1831 netdev_features_t features;
1832 netdev_features_t hw_features;
1833 netdev_features_t wanted_features;
1834 netdev_features_t vlan_features;
1835 netdev_features_t hw_enc_features;
1836 netdev_features_t mpls_features;
1837 netdev_features_t gso_partial_features;
1842 struct net_device_stats stats;
1844 atomic_long_t rx_dropped;
1845 atomic_long_t tx_dropped;
1846 atomic_long_t rx_nohandler;
1848 /* Stats to monitor link on/off, flapping */
1849 atomic_t carrier_up_count;
1850 atomic_t carrier_down_count;
1852 #ifdef CONFIG_WIRELESS_EXT
1853 const struct iw_handler_def *wireless_handlers;
1854 struct iw_public_data *wireless_data;
1856 const struct net_device_ops *netdev_ops;
1857 const struct ethtool_ops *ethtool_ops;
1858 #ifdef CONFIG_NET_L3_MASTER_DEV
1859 const struct l3mdev_ops *l3mdev_ops;
1861 #if IS_ENABLED(CONFIG_IPV6)
1862 const struct ndisc_ops *ndisc_ops;
1865 #ifdef CONFIG_XFRM_OFFLOAD
1866 const struct xfrmdev_ops *xfrmdev_ops;
1869 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1870 const struct tlsdev_ops *tlsdev_ops;
1873 const struct header_ops *header_ops;
1876 unsigned int priv_flags;
1878 unsigned short gflags;
1879 unsigned short padded;
1881 unsigned char operstate;
1882 unsigned char link_mode;
1884 unsigned char if_port;
1887 /* Note : dev->mtu is often read without holding a lock.
1888 * Writers usually hold RTNL.
1889 * It is recommended to use READ_ONCE() to annotate the reads,
1890 * and to use WRITE_ONCE() to annotate the writes.
1893 unsigned int min_mtu;
1894 unsigned int max_mtu;
1895 unsigned short type;
1896 unsigned short hard_header_len;
1897 unsigned char min_header_len;
1899 unsigned short needed_headroom;
1900 unsigned short needed_tailroom;
1902 /* Interface address info. */
1903 unsigned char perm_addr[MAX_ADDR_LEN];
1904 unsigned char addr_assign_type;
1905 unsigned char addr_len;
1906 unsigned char upper_level;
1907 unsigned char lower_level;
1908 unsigned short neigh_priv_len;
1909 unsigned short dev_id;
1910 unsigned short dev_port;
1911 spinlock_t addr_list_lock;
1912 unsigned char name_assign_type;
1914 struct netdev_hw_addr_list uc;
1915 struct netdev_hw_addr_list mc;
1916 struct netdev_hw_addr_list dev_addrs;
1919 struct kset *queues_kset;
1921 unsigned int promiscuity;
1922 unsigned int allmulti;
1925 /* Protocol-specific pointers */
1927 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1928 struct vlan_info __rcu *vlan_info;
1930 #if IS_ENABLED(CONFIG_NET_DSA)
1931 struct dsa_port *dsa_ptr;
1933 #if IS_ENABLED(CONFIG_TIPC)
1934 struct tipc_bearer __rcu *tipc_ptr;
1936 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1939 struct in_device __rcu *ip_ptr;
1940 #if IS_ENABLED(CONFIG_DECNET)
1941 struct dn_dev __rcu *dn_ptr;
1943 struct inet6_dev __rcu *ip6_ptr;
1944 #if IS_ENABLED(CONFIG_AX25)
1947 struct wireless_dev *ieee80211_ptr;
1948 struct wpan_dev *ieee802154_ptr;
1949 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1950 struct mpls_dev __rcu *mpls_ptr;
1954 * Cache lines mostly used on receive path (including eth_type_trans())
1956 /* Interface address info used in eth_type_trans() */
1957 unsigned char *dev_addr;
1959 struct netdev_rx_queue *_rx;
1960 unsigned int num_rx_queues;
1961 unsigned int real_num_rx_queues;
1963 struct bpf_prog __rcu *xdp_prog;
1964 unsigned long gro_flush_timeout;
1965 rx_handler_func_t __rcu *rx_handler;
1966 void __rcu *rx_handler_data;
1968 #ifdef CONFIG_NET_CLS_ACT
1969 struct mini_Qdisc __rcu *miniq_ingress;
1971 struct netdev_queue __rcu *ingress_queue;
1972 #ifdef CONFIG_NETFILTER_INGRESS
1973 struct nf_hook_entries __rcu *nf_hooks_ingress;
1976 unsigned char broadcast[MAX_ADDR_LEN];
1977 #ifdef CONFIG_RFS_ACCEL
1978 struct cpu_rmap *rx_cpu_rmap;
1980 struct hlist_node index_hlist;
1983 * Cache lines mostly used on transmit path
1985 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1986 unsigned int num_tx_queues;
1987 unsigned int real_num_tx_queues;
1988 struct Qdisc *qdisc;
1989 #ifdef CONFIG_NET_SCHED
1990 DECLARE_HASHTABLE (qdisc_hash, 4);
1992 unsigned int tx_queue_len;
1993 spinlock_t tx_global_lock;
1997 struct xps_dev_maps __rcu *xps_cpus_map;
1998 struct xps_dev_maps __rcu *xps_rxqs_map;
2000 #ifdef CONFIG_NET_CLS_ACT
2001 struct mini_Qdisc __rcu *miniq_egress;
2004 /* These may be needed for future network-power-down code. */
2005 struct timer_list watchdog_timer;
2007 int __percpu *pcpu_refcnt;
2008 struct list_head todo_list;
2010 struct list_head link_watch_list;
2012 enum { NETREG_UNINITIALIZED=0,
2013 NETREG_REGISTERED, /* completed register_netdevice */
2014 NETREG_UNREGISTERING, /* called unregister_netdevice */
2015 NETREG_UNREGISTERED, /* completed unregister todo */
2016 NETREG_RELEASED, /* called free_netdev */
2017 NETREG_DUMMY, /* dummy device for NAPI poll */
2023 RTNL_LINK_INITIALIZED,
2024 RTNL_LINK_INITIALIZING,
2025 } rtnl_link_state:16;
2027 bool needs_free_netdev;
2028 void (*priv_destructor)(struct net_device *dev);
2030 #ifdef CONFIG_NETPOLL
2031 struct netpoll_info __rcu *npinfo;
2034 possible_net_t nd_net;
2036 /* mid-layer private */
2039 struct pcpu_lstats __percpu *lstats;
2040 struct pcpu_sw_netstats __percpu *tstats;
2041 struct pcpu_dstats __percpu *dstats;
2044 #if IS_ENABLED(CONFIG_GARP)
2045 struct garp_port __rcu *garp_port;
2047 #if IS_ENABLED(CONFIG_MRP)
2048 struct mrp_port __rcu *mrp_port;
2052 const struct attribute_group *sysfs_groups[4];
2053 const struct attribute_group *sysfs_rx_queue_group;
2055 const struct rtnl_link_ops *rtnl_link_ops;
2057 /* for setting kernel sock attribute on TCP connection setup */
2058 #define GSO_MAX_SIZE 65536
2059 unsigned int gso_max_size;
2060 #define GSO_MAX_SEGS 65535
2064 const struct dcbnl_rtnl_ops *dcbnl_ops;
2067 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2068 u8 prio_tc_map[TC_BITMASK + 1];
2070 #if IS_ENABLED(CONFIG_FCOE)
2071 unsigned int fcoe_ddp_xid;
2073 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2074 struct netprio_map __rcu *priomap;
2076 struct phy_device *phydev;
2077 struct sfp_bus *sfp_bus;
2078 struct lock_class_key qdisc_tx_busylock_key;
2079 struct lock_class_key qdisc_running_key;
2080 struct lock_class_key qdisc_xmit_lock_key;
2081 struct lock_class_key addr_list_lock_key;
2083 unsigned wol_enabled:1;
2085 #define to_net_dev(d) container_of(d, struct net_device, dev)
2087 static inline bool netif_elide_gro(const struct net_device *dev)
2089 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2094 #define NETDEV_ALIGN 32
2097 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2099 return dev->prio_tc_map[prio & TC_BITMASK];
2103 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2105 if (tc >= dev->num_tc)
2108 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2112 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2113 void netdev_reset_tc(struct net_device *dev);
2114 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2115 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2118 int netdev_get_num_tc(struct net_device *dev)
2123 void netdev_unbind_sb_channel(struct net_device *dev,
2124 struct net_device *sb_dev);
2125 int netdev_bind_sb_channel_queue(struct net_device *dev,
2126 struct net_device *sb_dev,
2127 u8 tc, u16 count, u16 offset);
2128 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2129 static inline int netdev_get_sb_channel(struct net_device *dev)
2131 return max_t(int, -dev->num_tc, 0);
2135 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2138 return &dev->_tx[index];
2141 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2142 const struct sk_buff *skb)
2144 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2147 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2148 void (*f)(struct net_device *,
2149 struct netdev_queue *,
2155 for (i = 0; i < dev->num_tx_queues; i++)
2156 f(dev, &dev->_tx[i], arg);
2159 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2160 struct net_device *sb_dev);
2161 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2162 struct sk_buff *skb,
2163 struct net_device *sb_dev);
2165 /* returns the headroom that the master device needs to take in account
2166 * when forwarding to this dev
2168 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2170 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2173 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2175 if (dev->netdev_ops->ndo_set_rx_headroom)
2176 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2179 /* set the device rx headroom to the dev's default */
2180 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2182 netdev_set_rx_headroom(dev, -1);
2186 * Net namespace inlines
2189 struct net *dev_net(const struct net_device *dev)
2191 return read_pnet(&dev->nd_net);
2195 void dev_net_set(struct net_device *dev, struct net *net)
2197 write_pnet(&dev->nd_net, net);
2201 * netdev_priv - access network device private data
2202 * @dev: network device
2204 * Get network device private data
2206 static inline void *netdev_priv(const struct net_device *dev)
2208 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2211 /* Set the sysfs physical device reference for the network logical device
2212 * if set prior to registration will cause a symlink during initialization.
2214 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2216 /* Set the sysfs device type for the network logical device to allow
2217 * fine-grained identification of different network device types. For
2218 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2220 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2222 /* Default NAPI poll() weight
2223 * Device drivers are strongly advised to not use bigger value
2225 #define NAPI_POLL_WEIGHT 64
2228 * netif_napi_add - initialize a NAPI context
2229 * @dev: network device
2230 * @napi: NAPI context
2231 * @poll: polling function
2232 * @weight: default weight
2234 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2235 * *any* of the other NAPI-related functions.
2237 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2238 int (*poll)(struct napi_struct *, int), int weight);
2241 * netif_tx_napi_add - initialize a NAPI context
2242 * @dev: network device
2243 * @napi: NAPI context
2244 * @poll: polling function
2245 * @weight: default weight
2247 * This variant of netif_napi_add() should be used from drivers using NAPI
2248 * to exclusively poll a TX queue.
2249 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2251 static inline void netif_tx_napi_add(struct net_device *dev,
2252 struct napi_struct *napi,
2253 int (*poll)(struct napi_struct *, int),
2256 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2257 netif_napi_add(dev, napi, poll, weight);
2261 * netif_napi_del - remove a NAPI context
2262 * @napi: NAPI context
2264 * netif_napi_del() removes a NAPI context from the network device NAPI list
2266 void netif_napi_del(struct napi_struct *napi);
2268 struct napi_gro_cb {
2269 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2272 /* Length of frag0. */
2273 unsigned int frag0_len;
2275 /* This indicates where we are processing relative to skb->data. */
2278 /* This is non-zero if the packet cannot be merged with the new skb. */
2281 /* Save the IP ID here and check when we get to the transport layer */
2284 /* Number of segments aggregated. */
2287 /* Start offset for remote checksum offload */
2288 u16 gro_remcsum_start;
2290 /* jiffies when first packet was created/queued */
2293 /* Used in ipv6_gro_receive() and foo-over-udp */
2296 /* This is non-zero if the packet may be of the same flow. */
2299 /* Used in tunnel GRO receive */
2302 /* GRO checksum is valid */
2305 /* Number of checksums via CHECKSUM_UNNECESSARY */
2310 #define NAPI_GRO_FREE 1
2311 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2313 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2316 /* Used in GRE, set in fou/gue_gro_receive */
2319 /* Used to determine if flush_id can be ignored */
2322 /* Number of gro_receive callbacks this packet already went through */
2323 u8 recursion_counter:4;
2327 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2330 /* used in skb_gro_receive() slow path */
2331 struct sk_buff *last;
2334 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2336 #define GRO_RECURSION_LIMIT 15
2337 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2339 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2342 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2343 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2344 struct list_head *head,
2345 struct sk_buff *skb)
2347 if (unlikely(gro_recursion_inc_test(skb))) {
2348 NAPI_GRO_CB(skb)->flush |= 1;
2352 return cb(head, skb);
2355 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2357 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2359 struct list_head *head,
2360 struct sk_buff *skb)
2362 if (unlikely(gro_recursion_inc_test(skb))) {
2363 NAPI_GRO_CB(skb)->flush |= 1;
2367 return cb(sk, head, skb);
2370 struct packet_type {
2371 __be16 type; /* This is really htons(ether_type). */
2372 bool ignore_outgoing;
2373 struct net_device *dev; /* NULL is wildcarded here */
2374 int (*func) (struct sk_buff *,
2375 struct net_device *,
2376 struct packet_type *,
2377 struct net_device *);
2378 void (*list_func) (struct list_head *,
2379 struct packet_type *,
2380 struct net_device *);
2381 bool (*id_match)(struct packet_type *ptype,
2383 void *af_packet_priv;
2384 struct list_head list;
2387 struct offload_callbacks {
2388 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2389 netdev_features_t features);
2390 struct sk_buff *(*gro_receive)(struct list_head *head,
2391 struct sk_buff *skb);
2392 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2395 struct packet_offload {
2396 __be16 type; /* This is really htons(ether_type). */
2398 struct offload_callbacks callbacks;
2399 struct list_head list;
2402 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2403 struct pcpu_sw_netstats {
2408 struct u64_stats_sync syncp;
2409 } __aligned(4 * sizeof(u64));
2411 struct pcpu_lstats {
2412 u64_stats_t packets;
2414 struct u64_stats_sync syncp;
2415 } __aligned(2 * sizeof(u64));
2417 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2419 static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2421 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2423 u64_stats_update_begin(&lstats->syncp);
2424 u64_stats_add(&lstats->bytes, len);
2425 u64_stats_inc(&lstats->packets);
2426 u64_stats_update_end(&lstats->syncp);
2429 #define __netdev_alloc_pcpu_stats(type, gfp) \
2431 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2434 for_each_possible_cpu(__cpu) { \
2435 typeof(type) *stat; \
2436 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2437 u64_stats_init(&stat->syncp); \
2443 #define netdev_alloc_pcpu_stats(type) \
2444 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2446 enum netdev_lag_tx_type {
2447 NETDEV_LAG_TX_TYPE_UNKNOWN,
2448 NETDEV_LAG_TX_TYPE_RANDOM,
2449 NETDEV_LAG_TX_TYPE_BROADCAST,
2450 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2451 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2452 NETDEV_LAG_TX_TYPE_HASH,
2455 enum netdev_lag_hash {
2456 NETDEV_LAG_HASH_NONE,
2458 NETDEV_LAG_HASH_L34,
2459 NETDEV_LAG_HASH_L23,
2460 NETDEV_LAG_HASH_E23,
2461 NETDEV_LAG_HASH_E34,
2462 NETDEV_LAG_HASH_UNKNOWN,
2465 struct netdev_lag_upper_info {
2466 enum netdev_lag_tx_type tx_type;
2467 enum netdev_lag_hash hash_type;
2470 struct netdev_lag_lower_state_info {
2475 #include <linux/notifier.h>
2477 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2478 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2482 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2484 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2485 detected a hardware crash and restarted
2486 - we can use this eg to kick tcp sessions
2488 NETDEV_CHANGE, /* Notify device state change */
2491 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2492 NETDEV_CHANGEADDR, /* notify after the address change */
2493 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2497 NETDEV_BONDING_FAILOVER,
2499 NETDEV_PRE_TYPE_CHANGE,
2500 NETDEV_POST_TYPE_CHANGE,
2503 NETDEV_NOTIFY_PEERS,
2507 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2508 NETDEV_CHANGEINFODATA,
2509 NETDEV_BONDING_INFO,
2510 NETDEV_PRECHANGEUPPER,
2511 NETDEV_CHANGELOWERSTATE,
2512 NETDEV_UDP_TUNNEL_PUSH_INFO,
2513 NETDEV_UDP_TUNNEL_DROP_INFO,
2514 NETDEV_CHANGE_TX_QUEUE_LEN,
2515 NETDEV_CVLAN_FILTER_PUSH_INFO,
2516 NETDEV_CVLAN_FILTER_DROP_INFO,
2517 NETDEV_SVLAN_FILTER_PUSH_INFO,
2518 NETDEV_SVLAN_FILTER_DROP_INFO,
2520 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2522 int register_netdevice_notifier(struct notifier_block *nb);
2523 int unregister_netdevice_notifier(struct notifier_block *nb);
2524 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2525 int unregister_netdevice_notifier_net(struct net *net,
2526 struct notifier_block *nb);
2528 struct netdev_notifier_info {
2529 struct net_device *dev;
2530 struct netlink_ext_ack *extack;
2533 struct netdev_notifier_info_ext {
2534 struct netdev_notifier_info info; /* must be first */
2540 struct netdev_notifier_change_info {
2541 struct netdev_notifier_info info; /* must be first */
2542 unsigned int flags_changed;
2545 struct netdev_notifier_changeupper_info {
2546 struct netdev_notifier_info info; /* must be first */
2547 struct net_device *upper_dev; /* new upper dev */
2548 bool master; /* is upper dev master */
2549 bool linking; /* is the notification for link or unlink */
2550 void *upper_info; /* upper dev info */
2553 struct netdev_notifier_changelowerstate_info {
2554 struct netdev_notifier_info info; /* must be first */
2555 void *lower_state_info; /* is lower dev state */
2558 struct netdev_notifier_pre_changeaddr_info {
2559 struct netdev_notifier_info info; /* must be first */
2560 const unsigned char *dev_addr;
2563 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2564 struct net_device *dev)
2567 info->extack = NULL;
2570 static inline struct net_device *
2571 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2576 static inline struct netlink_ext_ack *
2577 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2579 return info->extack;
2582 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2585 extern rwlock_t dev_base_lock; /* Device list lock */
2587 #define for_each_netdev(net, d) \
2588 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2589 #define for_each_netdev_reverse(net, d) \
2590 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2591 #define for_each_netdev_rcu(net, d) \
2592 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2593 #define for_each_netdev_safe(net, d, n) \
2594 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2595 #define for_each_netdev_continue(net, d) \
2596 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2597 #define for_each_netdev_continue_reverse(net, d) \
2598 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2600 #define for_each_netdev_continue_rcu(net, d) \
2601 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2602 #define for_each_netdev_in_bond_rcu(bond, slave) \
2603 for_each_netdev_rcu(&init_net, slave) \
2604 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2605 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2607 static inline struct net_device *next_net_device(struct net_device *dev)
2609 struct list_head *lh;
2613 lh = dev->dev_list.next;
2614 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2617 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2619 struct list_head *lh;
2623 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2624 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2627 static inline struct net_device *first_net_device(struct net *net)
2629 return list_empty(&net->dev_base_head) ? NULL :
2630 net_device_entry(net->dev_base_head.next);
2633 static inline struct net_device *first_net_device_rcu(struct net *net)
2635 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2637 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2640 int netdev_boot_setup_check(struct net_device *dev);
2641 unsigned long netdev_boot_base(const char *prefix, int unit);
2642 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2643 const char *hwaddr);
2644 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2645 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2646 void dev_add_pack(struct packet_type *pt);
2647 void dev_remove_pack(struct packet_type *pt);
2648 void __dev_remove_pack(struct packet_type *pt);
2649 void dev_add_offload(struct packet_offload *po);
2650 void dev_remove_offload(struct packet_offload *po);
2652 int dev_get_iflink(const struct net_device *dev);
2653 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2654 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2655 unsigned short mask);
2656 struct net_device *dev_get_by_name(struct net *net, const char *name);
2657 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2658 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2659 int dev_alloc_name(struct net_device *dev, const char *name);
2660 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2661 void dev_close(struct net_device *dev);
2662 void dev_close_many(struct list_head *head, bool unlink);
2663 void dev_disable_lro(struct net_device *dev);
2664 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2665 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2666 struct net_device *sb_dev);
2667 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2668 struct net_device *sb_dev);
2669 int dev_queue_xmit(struct sk_buff *skb);
2670 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2671 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2672 int register_netdevice(struct net_device *dev);
2673 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2674 void unregister_netdevice_many(struct list_head *head);
2675 static inline void unregister_netdevice(struct net_device *dev)
2677 unregister_netdevice_queue(dev, NULL);
2680 int netdev_refcnt_read(const struct net_device *dev);
2681 void free_netdev(struct net_device *dev);
2682 void netdev_freemem(struct net_device *dev);
2683 void synchronize_net(void);
2684 int init_dummy_netdev(struct net_device *dev);
2686 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2687 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2688 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2689 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2690 int netdev_get_name(struct net *net, char *name, int ifindex);
2691 int dev_restart(struct net_device *dev);
2692 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2694 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2696 return NAPI_GRO_CB(skb)->data_offset;
2699 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2701 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2704 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2706 NAPI_GRO_CB(skb)->data_offset += len;
2709 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2710 unsigned int offset)
2712 return NAPI_GRO_CB(skb)->frag0 + offset;
2715 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2717 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2720 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2722 NAPI_GRO_CB(skb)->frag0 = NULL;
2723 NAPI_GRO_CB(skb)->frag0_len = 0;
2726 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2727 unsigned int offset)
2729 if (!pskb_may_pull(skb, hlen))
2732 skb_gro_frag0_invalidate(skb);
2733 return skb->data + offset;
2736 static inline void *skb_gro_network_header(struct sk_buff *skb)
2738 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2739 skb_network_offset(skb);
2742 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2743 const void *start, unsigned int len)
2745 if (NAPI_GRO_CB(skb)->csum_valid)
2746 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2747 csum_partial(start, len, 0));
2750 /* GRO checksum functions. These are logical equivalents of the normal
2751 * checksum functions (in skbuff.h) except that they operate on the GRO
2752 * offsets and fields in sk_buff.
2755 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2757 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2759 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2762 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2766 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2767 skb_checksum_start_offset(skb) <
2768 skb_gro_offset(skb)) &&
2769 !skb_at_gro_remcsum_start(skb) &&
2770 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2771 (!zero_okay || check));
2774 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2777 if (NAPI_GRO_CB(skb)->csum_valid &&
2778 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2781 NAPI_GRO_CB(skb)->csum = psum;
2783 return __skb_gro_checksum_complete(skb);
2786 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2788 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2789 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2790 NAPI_GRO_CB(skb)->csum_cnt--;
2792 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2793 * verified a new top level checksum or an encapsulated one
2794 * during GRO. This saves work if we fallback to normal path.
2796 __skb_incr_checksum_unnecessary(skb);
2800 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2803 __sum16 __ret = 0; \
2804 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2805 __ret = __skb_gro_checksum_validate_complete(skb, \
2806 compute_pseudo(skb, proto)); \
2808 skb_gro_incr_csum_unnecessary(skb); \
2812 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2813 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2815 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2817 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2819 #define skb_gro_checksum_simple_validate(skb) \
2820 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2822 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2824 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2825 !NAPI_GRO_CB(skb)->csum_valid);
2828 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2831 NAPI_GRO_CB(skb)->csum = ~pseudo;
2832 NAPI_GRO_CB(skb)->csum_valid = 1;
2835 #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \
2837 if (__skb_gro_checksum_convert_check(skb)) \
2838 __skb_gro_checksum_convert(skb, \
2839 compute_pseudo(skb, proto)); \
2842 struct gro_remcsum {
2847 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2853 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2854 unsigned int off, size_t hdrlen,
2855 int start, int offset,
2856 struct gro_remcsum *grc,
2860 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2862 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2865 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2869 ptr = skb_gro_header_fast(skb, off);
2870 if (skb_gro_header_hard(skb, off + plen)) {
2871 ptr = skb_gro_header_slow(skb, off + plen, off);
2876 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2879 /* Adjust skb->csum since we changed the packet */
2880 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2882 grc->offset = off + hdrlen + offset;
2888 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2889 struct gro_remcsum *grc)
2892 size_t plen = grc->offset + sizeof(u16);
2897 ptr = skb_gro_header_fast(skb, grc->offset);
2898 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2899 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2904 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2907 #ifdef CONFIG_XFRM_OFFLOAD
2908 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2910 if (PTR_ERR(pp) != -EINPROGRESS)
2911 NAPI_GRO_CB(skb)->flush |= flush;
2913 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2916 struct gro_remcsum *grc)
2918 if (PTR_ERR(pp) != -EINPROGRESS) {
2919 NAPI_GRO_CB(skb)->flush |= flush;
2920 skb_gro_remcsum_cleanup(skb, grc);
2921 skb->remcsum_offload = 0;
2925 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2927 NAPI_GRO_CB(skb)->flush |= flush;
2929 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2932 struct gro_remcsum *grc)
2934 NAPI_GRO_CB(skb)->flush |= flush;
2935 skb_gro_remcsum_cleanup(skb, grc);
2936 skb->remcsum_offload = 0;
2940 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2941 unsigned short type,
2942 const void *daddr, const void *saddr,
2945 if (!dev->header_ops || !dev->header_ops->create)
2948 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2951 static inline int dev_parse_header(const struct sk_buff *skb,
2952 unsigned char *haddr)
2954 const struct net_device *dev = skb->dev;
2956 if (!dev->header_ops || !dev->header_ops->parse)
2958 return dev->header_ops->parse(skb, haddr);
2961 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2963 const struct net_device *dev = skb->dev;
2965 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2967 return dev->header_ops->parse_protocol(skb);
2970 /* ll_header must have at least hard_header_len allocated */
2971 static inline bool dev_validate_header(const struct net_device *dev,
2972 char *ll_header, int len)
2974 if (likely(len >= dev->hard_header_len))
2976 if (len < dev->min_header_len)
2979 if (capable(CAP_SYS_RAWIO)) {
2980 memset(ll_header + len, 0, dev->hard_header_len - len);
2984 if (dev->header_ops && dev->header_ops->validate)
2985 return dev->header_ops->validate(ll_header, len);
2990 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2992 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2993 static inline int unregister_gifconf(unsigned int family)
2995 return register_gifconf(family, NULL);
2998 #ifdef CONFIG_NET_FLOW_LIMIT
2999 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
3000 struct sd_flow_limit {
3002 unsigned int num_buckets;
3003 unsigned int history_head;
3004 u16 history[FLOW_LIMIT_HISTORY];
3008 extern int netdev_flow_limit_table_len;
3009 #endif /* CONFIG_NET_FLOW_LIMIT */
3012 * Incoming packets are placed on per-CPU queues
3014 struct softnet_data {
3015 struct list_head poll_list;
3016 struct sk_buff_head process_queue;
3019 unsigned int processed;
3020 unsigned int time_squeeze;
3021 unsigned int received_rps;
3023 struct softnet_data *rps_ipi_list;
3025 #ifdef CONFIG_NET_FLOW_LIMIT
3026 struct sd_flow_limit __rcu *flow_limit;
3028 struct Qdisc *output_queue;
3029 struct Qdisc **output_queue_tailp;
3030 struct sk_buff *completion_queue;
3031 #ifdef CONFIG_XFRM_OFFLOAD
3032 struct sk_buff_head xfrm_backlog;
3034 /* written and read only by owning cpu: */
3040 /* input_queue_head should be written by cpu owning this struct,
3041 * and only read by other cpus. Worth using a cache line.
3043 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3045 /* Elements below can be accessed between CPUs for RPS/RFS */
3046 call_single_data_t csd ____cacheline_aligned_in_smp;
3047 struct softnet_data *rps_ipi_next;
3049 unsigned int input_queue_tail;
3051 unsigned int dropped;
3052 struct sk_buff_head input_pkt_queue;
3053 struct napi_struct backlog;
3057 static inline void input_queue_head_incr(struct softnet_data *sd)
3060 sd->input_queue_head++;
3064 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3065 unsigned int *qtail)
3068 *qtail = ++sd->input_queue_tail;
3072 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3074 static inline int dev_recursion_level(void)
3076 return this_cpu_read(softnet_data.xmit.recursion);
3079 #define XMIT_RECURSION_LIMIT 10
3080 static inline bool dev_xmit_recursion(void)
3082 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3083 XMIT_RECURSION_LIMIT);
3086 static inline void dev_xmit_recursion_inc(void)
3088 __this_cpu_inc(softnet_data.xmit.recursion);
3091 static inline void dev_xmit_recursion_dec(void)
3093 __this_cpu_dec(softnet_data.xmit.recursion);
3096 void __netif_schedule(struct Qdisc *q);
3097 void netif_schedule_queue(struct netdev_queue *txq);
3099 static inline void netif_tx_schedule_all(struct net_device *dev)
3103 for (i = 0; i < dev->num_tx_queues; i++)
3104 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3107 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3109 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3113 * netif_start_queue - allow transmit
3114 * @dev: network device
3116 * Allow upper layers to call the device hard_start_xmit routine.
3118 static inline void netif_start_queue(struct net_device *dev)
3120 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3123 static inline void netif_tx_start_all_queues(struct net_device *dev)
3127 for (i = 0; i < dev->num_tx_queues; i++) {
3128 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3129 netif_tx_start_queue(txq);
3133 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3136 * netif_wake_queue - restart transmit
3137 * @dev: network device
3139 * Allow upper layers to call the device hard_start_xmit routine.
3140 * Used for flow control when transmit resources are available.
3142 static inline void netif_wake_queue(struct net_device *dev)
3144 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3147 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3151 for (i = 0; i < dev->num_tx_queues; i++) {
3152 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3153 netif_tx_wake_queue(txq);
3157 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3159 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3163 * netif_stop_queue - stop transmitted packets
3164 * @dev: network device
3166 * Stop upper layers calling the device hard_start_xmit routine.
3167 * Used for flow control when transmit resources are unavailable.
3169 static inline void netif_stop_queue(struct net_device *dev)
3171 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3174 void netif_tx_stop_all_queues(struct net_device *dev);
3175 void netdev_update_lockdep_key(struct net_device *dev);
3177 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3179 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3183 * netif_queue_stopped - test if transmit queue is flowblocked
3184 * @dev: network device
3186 * Test if transmit queue on device is currently unable to send.
3188 static inline bool netif_queue_stopped(const struct net_device *dev)
3190 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3193 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3195 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3199 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3201 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3205 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3207 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3211 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3212 * @dev_queue: pointer to transmit queue
3214 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3215 * to give appropriate hint to the CPU.
3217 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3220 prefetchw(&dev_queue->dql.num_queued);
3225 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3226 * @dev_queue: pointer to transmit queue
3228 * BQL enabled drivers might use this helper in their TX completion path,
3229 * to give appropriate hint to the CPU.
3231 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3234 prefetchw(&dev_queue->dql.limit);
3238 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3242 dql_queued(&dev_queue->dql, bytes);
3244 if (likely(dql_avail(&dev_queue->dql) >= 0))
3247 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3250 * The XOFF flag must be set before checking the dql_avail below,
3251 * because in netdev_tx_completed_queue we update the dql_completed
3252 * before checking the XOFF flag.
3256 /* check again in case another CPU has just made room avail */
3257 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3258 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3262 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3263 * that they should not test BQL status themselves.
3264 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3266 * Returns true if the doorbell must be used to kick the NIC.
3268 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3274 dql_queued(&dev_queue->dql, bytes);
3276 return netif_tx_queue_stopped(dev_queue);
3278 netdev_tx_sent_queue(dev_queue, bytes);
3283 * netdev_sent_queue - report the number of bytes queued to hardware
3284 * @dev: network device
3285 * @bytes: number of bytes queued to the hardware device queue
3287 * Report the number of bytes queued for sending/completion to the network
3288 * device hardware queue. @bytes should be a good approximation and should
3289 * exactly match netdev_completed_queue() @bytes
3291 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3293 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3296 static inline bool __netdev_sent_queue(struct net_device *dev,
3300 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3304 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3305 unsigned int pkts, unsigned int bytes)
3308 if (unlikely(!bytes))
3311 dql_completed(&dev_queue->dql, bytes);
3314 * Without the memory barrier there is a small possiblity that
3315 * netdev_tx_sent_queue will miss the update and cause the queue to
3316 * be stopped forever
3320 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3323 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3324 netif_schedule_queue(dev_queue);
3329 * netdev_completed_queue - report bytes and packets completed by device
3330 * @dev: network device
3331 * @pkts: actual number of packets sent over the medium
3332 * @bytes: actual number of bytes sent over the medium
3334 * Report the number of bytes and packets transmitted by the network device
3335 * hardware queue over the physical medium, @bytes must exactly match the
3336 * @bytes amount passed to netdev_sent_queue()
3338 static inline void netdev_completed_queue(struct net_device *dev,
3339 unsigned int pkts, unsigned int bytes)
3341 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3344 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3347 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3353 * netdev_reset_queue - reset the packets and bytes count of a network device
3354 * @dev_queue: network device
3356 * Reset the bytes and packet count of a network device and clear the
3357 * software flow control OFF bit for this network device
3359 static inline void netdev_reset_queue(struct net_device *dev_queue)
3361 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3365 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3366 * @dev: network device
3367 * @queue_index: given tx queue index
3369 * Returns 0 if given tx queue index >= number of device tx queues,
3370 * otherwise returns the originally passed tx queue index.
3372 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3374 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3375 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3376 dev->name, queue_index,
3377 dev->real_num_tx_queues);
3385 * netif_running - test if up
3386 * @dev: network device
3388 * Test if the device has been brought up.
3390 static inline bool netif_running(const struct net_device *dev)
3392 return test_bit(__LINK_STATE_START, &dev->state);
3396 * Routines to manage the subqueues on a device. We only need start,
3397 * stop, and a check if it's stopped. All other device management is
3398 * done at the overall netdevice level.
3399 * Also test the device if we're multiqueue.
3403 * netif_start_subqueue - allow sending packets on subqueue
3404 * @dev: network device
3405 * @queue_index: sub queue index
3407 * Start individual transmit queue of a device with multiple transmit queues.
3409 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3411 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3413 netif_tx_start_queue(txq);
3417 * netif_stop_subqueue - stop sending packets on subqueue
3418 * @dev: network device
3419 * @queue_index: sub queue index
3421 * Stop individual transmit queue of a device with multiple transmit queues.
3423 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3425 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3426 netif_tx_stop_queue(txq);
3430 * netif_subqueue_stopped - test status of subqueue
3431 * @dev: network device
3432 * @queue_index: sub queue index
3434 * Check individual transmit queue of a device with multiple transmit queues.
3436 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3439 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3441 return netif_tx_queue_stopped(txq);
3444 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3445 struct sk_buff *skb)
3447 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3451 * netif_wake_subqueue - allow sending packets on subqueue
3452 * @dev: network device
3453 * @queue_index: sub queue index
3455 * Resume individual transmit queue of a device with multiple transmit queues.
3457 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3459 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3461 netif_tx_wake_queue(txq);
3465 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3467 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3468 u16 index, bool is_rxqs_map);
3471 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3472 * @j: CPU/Rx queue index
3473 * @mask: bitmask of all cpus/rx queues
3474 * @nr_bits: number of bits in the bitmask
3476 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3478 static inline bool netif_attr_test_mask(unsigned long j,
3479 const unsigned long *mask,
3480 unsigned int nr_bits)
3482 cpu_max_bits_warn(j, nr_bits);
3483 return test_bit(j, mask);
3487 * netif_attr_test_online - Test for online CPU/Rx queue
3488 * @j: CPU/Rx queue index
3489 * @online_mask: bitmask for CPUs/Rx queues that are online
3490 * @nr_bits: number of bits in the bitmask
3492 * Returns true if a CPU/Rx queue is online.
3494 static inline bool netif_attr_test_online(unsigned long j,
3495 const unsigned long *online_mask,
3496 unsigned int nr_bits)
3498 cpu_max_bits_warn(j, nr_bits);
3501 return test_bit(j, online_mask);
3503 return (j < nr_bits);
3507 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3508 * @n: CPU/Rx queue index
3509 * @srcp: the cpumask/Rx queue mask pointer
3510 * @nr_bits: number of bits in the bitmask
3512 * Returns >= nr_bits if no further CPUs/Rx queues set.
3514 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3515 unsigned int nr_bits)
3517 /* -1 is a legal arg here. */
3519 cpu_max_bits_warn(n, nr_bits);
3522 return find_next_bit(srcp, nr_bits, n + 1);
3528 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3529 * @n: CPU/Rx queue index
3530 * @src1p: the first CPUs/Rx queues mask pointer
3531 * @src2p: the second CPUs/Rx queues mask pointer
3532 * @nr_bits: number of bits in the bitmask
3534 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3536 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3537 const unsigned long *src2p,
3538 unsigned int nr_bits)
3540 /* -1 is a legal arg here. */
3542 cpu_max_bits_warn(n, nr_bits);
3545 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3547 return find_next_bit(src1p, nr_bits, n + 1);
3549 return find_next_bit(src2p, nr_bits, n + 1);
3554 static inline int netif_set_xps_queue(struct net_device *dev,
3555 const struct cpumask *mask,
3561 static inline int __netif_set_xps_queue(struct net_device *dev,
3562 const unsigned long *mask,
3563 u16 index, bool is_rxqs_map)
3570 * netif_is_multiqueue - test if device has multiple transmit queues
3571 * @dev: network device
3573 * Check if device has multiple transmit queues
3575 static inline bool netif_is_multiqueue(const struct net_device *dev)
3577 return dev->num_tx_queues > 1;
3580 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3583 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3585 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3588 dev->real_num_rx_queues = rxqs;
3593 static inline struct netdev_rx_queue *
3594 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3596 return dev->_rx + rxq;
3600 static inline unsigned int get_netdev_rx_queue_index(
3601 struct netdev_rx_queue *queue)
3603 struct net_device *dev = queue->dev;
3604 int index = queue - dev->_rx;
3606 BUG_ON(index >= dev->num_rx_queues);
3611 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3612 int netif_get_num_default_rss_queues(void);
3614 enum skb_free_reason {
3615 SKB_REASON_CONSUMED,
3619 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3620 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3623 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3624 * interrupt context or with hardware interrupts being disabled.
3625 * (in_irq() || irqs_disabled())
3627 * We provide four helpers that can be used in following contexts :
3629 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3630 * replacing kfree_skb(skb)
3632 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3633 * Typically used in place of consume_skb(skb) in TX completion path
3635 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3636 * replacing kfree_skb(skb)
3638 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3639 * and consumed a packet. Used in place of consume_skb(skb)
3641 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3643 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3646 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3648 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3651 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3653 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3656 static inline void dev_consume_skb_any(struct sk_buff *skb)
3658 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3661 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3662 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3663 int netif_rx(struct sk_buff *skb);
3664 int netif_rx_ni(struct sk_buff *skb);
3665 int netif_receive_skb(struct sk_buff *skb);
3666 int netif_receive_skb_core(struct sk_buff *skb);
3667 void netif_receive_skb_list(struct list_head *head);
3668 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3669 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3670 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3671 gro_result_t napi_gro_frags(struct napi_struct *napi);
3672 struct packet_offload *gro_find_receive_by_type(__be16 type);
3673 struct packet_offload *gro_find_complete_by_type(__be16 type);
3675 static inline void napi_free_frags(struct napi_struct *napi)
3677 kfree_skb(napi->skb);
3681 bool netdev_is_rx_handler_busy(struct net_device *dev);
3682 int netdev_rx_handler_register(struct net_device *dev,
3683 rx_handler_func_t *rx_handler,
3684 void *rx_handler_data);
3685 void netdev_rx_handler_unregister(struct net_device *dev);
3687 bool dev_valid_name(const char *name);
3688 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3689 bool *need_copyout);
3690 int dev_ifconf(struct net *net, struct ifconf *, int);
3691 int dev_ethtool(struct net *net, struct ifreq *);
3692 unsigned int dev_get_flags(const struct net_device *);
3693 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3694 struct netlink_ext_ack *extack);
3695 int dev_change_flags(struct net_device *dev, unsigned int flags,
3696 struct netlink_ext_ack *extack);
3697 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3698 unsigned int gchanges);
3699 int dev_change_name(struct net_device *, const char *);
3700 int dev_set_alias(struct net_device *, const char *, size_t);
3701 int dev_get_alias(const struct net_device *, char *, size_t);
3702 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3703 int __dev_set_mtu(struct net_device *, int);
3704 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3705 struct netlink_ext_ack *extack);
3706 int dev_set_mtu(struct net_device *, int);
3707 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3708 void dev_set_group(struct net_device *, int);
3709 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3710 struct netlink_ext_ack *extack);
3711 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3712 struct netlink_ext_ack *extack);
3713 int dev_change_carrier(struct net_device *, bool new_carrier);
3714 int dev_get_phys_port_id(struct net_device *dev,
3715 struct netdev_phys_item_id *ppid);
3716 int dev_get_phys_port_name(struct net_device *dev,
3717 char *name, size_t len);
3718 int dev_get_port_parent_id(struct net_device *dev,
3719 struct netdev_phys_item_id *ppid, bool recurse);
3720 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3721 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3722 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3723 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3724 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3725 struct netdev_queue *txq, int *ret);
3727 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3728 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3730 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3731 enum bpf_netdev_command cmd);
3732 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3734 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3735 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3736 bool is_skb_forwardable(const struct net_device *dev,
3737 const struct sk_buff *skb);
3739 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3740 struct sk_buff *skb)
3742 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3743 unlikely(!is_skb_forwardable(dev, skb))) {
3744 atomic_long_inc(&dev->rx_dropped);
3749 skb_scrub_packet(skb, true);
3754 bool dev_nit_active(struct net_device *dev);
3755 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3757 extern int netdev_budget;
3758 extern unsigned int netdev_budget_usecs;
3760 /* Called by rtnetlink.c:rtnl_unlock() */
3761 void netdev_run_todo(void);
3764 * dev_put - release reference to device
3765 * @dev: network device
3767 * Release reference to device to allow it to be freed.
3769 static inline void dev_put(struct net_device *dev)
3771 this_cpu_dec(*dev->pcpu_refcnt);
3775 * dev_hold - get reference to device
3776 * @dev: network device
3778 * Hold reference to device to keep it from being freed.
3780 static inline void dev_hold(struct net_device *dev)
3782 this_cpu_inc(*dev->pcpu_refcnt);
3785 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3786 * and _off may be called from IRQ context, but it is caller
3787 * who is responsible for serialization of these calls.
3789 * The name carrier is inappropriate, these functions should really be
3790 * called netif_lowerlayer_*() because they represent the state of any
3791 * kind of lower layer not just hardware media.
3794 void linkwatch_init_dev(struct net_device *dev);
3795 void linkwatch_fire_event(struct net_device *dev);
3796 void linkwatch_forget_dev(struct net_device *dev);
3799 * netif_carrier_ok - test if carrier present
3800 * @dev: network device
3802 * Check if carrier is present on device
3804 static inline bool netif_carrier_ok(const struct net_device *dev)
3806 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3809 unsigned long dev_trans_start(struct net_device *dev);
3811 void __netdev_watchdog_up(struct net_device *dev);
3813 void netif_carrier_on(struct net_device *dev);
3815 void netif_carrier_off(struct net_device *dev);
3818 * netif_dormant_on - mark device as dormant.
3819 * @dev: network device
3821 * Mark device as dormant (as per RFC2863).
3823 * The dormant state indicates that the relevant interface is not
3824 * actually in a condition to pass packets (i.e., it is not 'up') but is
3825 * in a "pending" state, waiting for some external event. For "on-
3826 * demand" interfaces, this new state identifies the situation where the
3827 * interface is waiting for events to place it in the up state.
3829 static inline void netif_dormant_on(struct net_device *dev)
3831 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3832 linkwatch_fire_event(dev);
3836 * netif_dormant_off - set device as not dormant.
3837 * @dev: network device
3839 * Device is not in dormant state.
3841 static inline void netif_dormant_off(struct net_device *dev)
3843 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3844 linkwatch_fire_event(dev);
3848 * netif_dormant - test if device is dormant
3849 * @dev: network device
3851 * Check if device is dormant.
3853 static inline bool netif_dormant(const struct net_device *dev)
3855 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3860 * netif_oper_up - test if device is operational
3861 * @dev: network device
3863 * Check if carrier is operational
3865 static inline bool netif_oper_up(const struct net_device *dev)
3867 return (dev->operstate == IF_OPER_UP ||
3868 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3872 * netif_device_present - is device available or removed
3873 * @dev: network device
3875 * Check if device has not been removed from system.
3877 static inline bool netif_device_present(struct net_device *dev)
3879 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3882 void netif_device_detach(struct net_device *dev);
3884 void netif_device_attach(struct net_device *dev);
3887 * Network interface message level settings
3891 NETIF_MSG_DRV = 0x0001,
3892 NETIF_MSG_PROBE = 0x0002,
3893 NETIF_MSG_LINK = 0x0004,
3894 NETIF_MSG_TIMER = 0x0008,
3895 NETIF_MSG_IFDOWN = 0x0010,
3896 NETIF_MSG_IFUP = 0x0020,
3897 NETIF_MSG_RX_ERR = 0x0040,
3898 NETIF_MSG_TX_ERR = 0x0080,
3899 NETIF_MSG_TX_QUEUED = 0x0100,
3900 NETIF_MSG_INTR = 0x0200,
3901 NETIF_MSG_TX_DONE = 0x0400,
3902 NETIF_MSG_RX_STATUS = 0x0800,
3903 NETIF_MSG_PKTDATA = 0x1000,
3904 NETIF_MSG_HW = 0x2000,
3905 NETIF_MSG_WOL = 0x4000,
3908 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3909 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3910 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3911 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3912 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3913 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3914 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3915 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3916 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3917 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3918 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3919 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3920 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3921 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3922 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3924 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3927 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3928 return default_msg_enable_bits;
3929 if (debug_value == 0) /* no output */
3931 /* set low N bits */
3932 return (1U << debug_value) - 1;
3935 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3937 spin_lock(&txq->_xmit_lock);
3938 txq->xmit_lock_owner = cpu;
3941 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3943 __acquire(&txq->_xmit_lock);
3947 static inline void __netif_tx_release(struct netdev_queue *txq)
3949 __release(&txq->_xmit_lock);
3952 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3954 spin_lock_bh(&txq->_xmit_lock);
3955 txq->xmit_lock_owner = smp_processor_id();
3958 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3960 bool ok = spin_trylock(&txq->_xmit_lock);
3962 txq->xmit_lock_owner = smp_processor_id();
3966 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3968 txq->xmit_lock_owner = -1;
3969 spin_unlock(&txq->_xmit_lock);
3972 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3974 txq->xmit_lock_owner = -1;
3975 spin_unlock_bh(&txq->_xmit_lock);
3978 static inline void txq_trans_update(struct netdev_queue *txq)
3980 if (txq->xmit_lock_owner != -1)
3981 txq->trans_start = jiffies;
3984 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3985 static inline void netif_trans_update(struct net_device *dev)
3987 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3989 if (txq->trans_start != jiffies)
3990 txq->trans_start = jiffies;
3994 * netif_tx_lock - grab network device transmit lock
3995 * @dev: network device
3997 * Get network device transmit lock
3999 static inline void netif_tx_lock(struct net_device *dev)
4004 spin_lock(&dev->tx_global_lock);
4005 cpu = smp_processor_id();
4006 for (i = 0; i < dev->num_tx_queues; i++) {
4007 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4009 /* We are the only thread of execution doing a
4010 * freeze, but we have to grab the _xmit_lock in
4011 * order to synchronize with threads which are in
4012 * the ->hard_start_xmit() handler and already
4013 * checked the frozen bit.
4015 __netif_tx_lock(txq, cpu);
4016 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
4017 __netif_tx_unlock(txq);
4021 static inline void netif_tx_lock_bh(struct net_device *dev)
4027 static inline void netif_tx_unlock(struct net_device *dev)
4031 for (i = 0; i < dev->num_tx_queues; i++) {
4032 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4034 /* No need to grab the _xmit_lock here. If the
4035 * queue is not stopped for another reason, we
4038 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4039 netif_schedule_queue(txq);
4041 spin_unlock(&dev->tx_global_lock);
4044 static inline void netif_tx_unlock_bh(struct net_device *dev)
4046 netif_tx_unlock(dev);
4050 #define HARD_TX_LOCK(dev, txq, cpu) { \
4051 if ((dev->features & NETIF_F_LLTX) == 0) { \
4052 __netif_tx_lock(txq, cpu); \
4054 __netif_tx_acquire(txq); \
4058 #define HARD_TX_TRYLOCK(dev, txq) \
4059 (((dev->features & NETIF_F_LLTX) == 0) ? \
4060 __netif_tx_trylock(txq) : \
4061 __netif_tx_acquire(txq))
4063 #define HARD_TX_UNLOCK(dev, txq) { \
4064 if ((dev->features & NETIF_F_LLTX) == 0) { \
4065 __netif_tx_unlock(txq); \
4067 __netif_tx_release(txq); \
4071 static inline void netif_tx_disable(struct net_device *dev)
4077 cpu = smp_processor_id();
4078 for (i = 0; i < dev->num_tx_queues; i++) {
4079 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4081 __netif_tx_lock(txq, cpu);
4082 netif_tx_stop_queue(txq);
4083 __netif_tx_unlock(txq);
4088 static inline void netif_addr_lock(struct net_device *dev)
4090 spin_lock(&dev->addr_list_lock);
4093 static inline void netif_addr_lock_bh(struct net_device *dev)
4095 spin_lock_bh(&dev->addr_list_lock);
4098 static inline void netif_addr_unlock(struct net_device *dev)
4100 spin_unlock(&dev->addr_list_lock);
4103 static inline void netif_addr_unlock_bh(struct net_device *dev)
4105 spin_unlock_bh(&dev->addr_list_lock);
4109 * dev_addrs walker. Should be used only for read access. Call with
4110 * rcu_read_lock held.
4112 #define for_each_dev_addr(dev, ha) \
4113 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4115 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4117 void ether_setup(struct net_device *dev);
4119 /* Support for loadable net-drivers */
4120 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4121 unsigned char name_assign_type,
4122 void (*setup)(struct net_device *),
4123 unsigned int txqs, unsigned int rxqs);
4124 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4125 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4127 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4128 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4131 int register_netdev(struct net_device *dev);
4132 void unregister_netdev(struct net_device *dev);
4134 /* General hardware address lists handling functions */
4135 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4136 struct netdev_hw_addr_list *from_list, int addr_len);
4137 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4138 struct netdev_hw_addr_list *from_list, int addr_len);
4139 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4140 struct net_device *dev,
4141 int (*sync)(struct net_device *, const unsigned char *),
4142 int (*unsync)(struct net_device *,
4143 const unsigned char *));
4144 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4145 struct net_device *dev,
4146 int (*sync)(struct net_device *,
4147 const unsigned char *, int),
4148 int (*unsync)(struct net_device *,
4149 const unsigned char *, int));
4150 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4151 struct net_device *dev,
4152 int (*unsync)(struct net_device *,
4153 const unsigned char *, int));
4154 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4155 struct net_device *dev,
4156 int (*unsync)(struct net_device *,
4157 const unsigned char *));
4158 void __hw_addr_init(struct netdev_hw_addr_list *list);
4160 /* Functions used for device addresses handling */
4161 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4162 unsigned char addr_type);
4163 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4164 unsigned char addr_type);
4165 void dev_addr_flush(struct net_device *dev);
4166 int dev_addr_init(struct net_device *dev);
4168 /* Functions used for unicast addresses handling */
4169 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4170 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4171 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4172 int dev_uc_sync(struct net_device *to, struct net_device *from);
4173 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4174 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4175 void dev_uc_flush(struct net_device *dev);
4176 void dev_uc_init(struct net_device *dev);
4179 * __dev_uc_sync - Synchonize device's unicast list
4180 * @dev: device to sync
4181 * @sync: function to call if address should be added
4182 * @unsync: function to call if address should be removed
4184 * Add newly added addresses to the interface, and release
4185 * addresses that have been deleted.
4187 static inline int __dev_uc_sync(struct net_device *dev,
4188 int (*sync)(struct net_device *,
4189 const unsigned char *),
4190 int (*unsync)(struct net_device *,
4191 const unsigned char *))
4193 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4197 * __dev_uc_unsync - Remove synchronized addresses from device
4198 * @dev: device to sync
4199 * @unsync: function to call if address should be removed
4201 * Remove all addresses that were added to the device by dev_uc_sync().
4203 static inline void __dev_uc_unsync(struct net_device *dev,
4204 int (*unsync)(struct net_device *,
4205 const unsigned char *))
4207 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4210 /* Functions used for multicast addresses handling */
4211 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4212 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4213 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4214 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4215 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4216 int dev_mc_sync(struct net_device *to, struct net_device *from);
4217 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4218 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4219 void dev_mc_flush(struct net_device *dev);
4220 void dev_mc_init(struct net_device *dev);
4223 * __dev_mc_sync - Synchonize device's multicast list
4224 * @dev: device to sync
4225 * @sync: function to call if address should be added
4226 * @unsync: function to call if address should be removed
4228 * Add newly added addresses to the interface, and release
4229 * addresses that have been deleted.
4231 static inline int __dev_mc_sync(struct net_device *dev,
4232 int (*sync)(struct net_device *,
4233 const unsigned char *),
4234 int (*unsync)(struct net_device *,
4235 const unsigned char *))
4237 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4241 * __dev_mc_unsync - Remove synchronized addresses from device
4242 * @dev: device to sync
4243 * @unsync: function to call if address should be removed
4245 * Remove all addresses that were added to the device by dev_mc_sync().
4247 static inline void __dev_mc_unsync(struct net_device *dev,
4248 int (*unsync)(struct net_device *,
4249 const unsigned char *))
4251 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4254 /* Functions used for secondary unicast and multicast support */
4255 void dev_set_rx_mode(struct net_device *dev);
4256 void __dev_set_rx_mode(struct net_device *dev);
4257 int dev_set_promiscuity(struct net_device *dev, int inc);
4258 int dev_set_allmulti(struct net_device *dev, int inc);
4259 void netdev_state_change(struct net_device *dev);
4260 void netdev_notify_peers(struct net_device *dev);
4261 void netdev_features_change(struct net_device *dev);
4262 /* Load a device via the kmod */
4263 void dev_load(struct net *net, const char *name);
4264 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4265 struct rtnl_link_stats64 *storage);
4266 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4267 const struct net_device_stats *netdev_stats);
4269 extern int netdev_max_backlog;
4270 extern int netdev_tstamp_prequeue;
4271 extern int weight_p;
4272 extern int dev_weight_rx_bias;
4273 extern int dev_weight_tx_bias;
4274 extern int dev_rx_weight;
4275 extern int dev_tx_weight;
4276 extern int gro_normal_batch;
4278 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4279 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4280 struct list_head **iter);
4281 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4282 struct list_head **iter);
4284 /* iterate through upper list, must be called under RCU read lock */
4285 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4286 for (iter = &(dev)->adj_list.upper, \
4287 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4289 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4291 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4292 int (*fn)(struct net_device *upper_dev,
4296 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4297 struct net_device *upper_dev);
4299 bool netdev_has_any_upper_dev(struct net_device *dev);
4301 void *netdev_lower_get_next_private(struct net_device *dev,
4302 struct list_head **iter);
4303 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4304 struct list_head **iter);
4306 #define netdev_for_each_lower_private(dev, priv, iter) \
4307 for (iter = (dev)->adj_list.lower.next, \
4308 priv = netdev_lower_get_next_private(dev, &(iter)); \
4310 priv = netdev_lower_get_next_private(dev, &(iter)))
4312 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4313 for (iter = &(dev)->adj_list.lower, \
4314 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4316 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4318 void *netdev_lower_get_next(struct net_device *dev,
4319 struct list_head **iter);
4321 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4322 for (iter = (dev)->adj_list.lower.next, \
4323 ldev = netdev_lower_get_next(dev, &(iter)); \
4325 ldev = netdev_lower_get_next(dev, &(iter)))
4327 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4328 struct list_head **iter);
4329 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4330 struct list_head **iter);
4332 int netdev_walk_all_lower_dev(struct net_device *dev,
4333 int (*fn)(struct net_device *lower_dev,
4336 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4337 int (*fn)(struct net_device *lower_dev,
4341 void *netdev_adjacent_get_private(struct list_head *adj_list);
4342 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4343 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4344 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4345 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4346 struct netlink_ext_ack *extack);
4347 int netdev_master_upper_dev_link(struct net_device *dev,
4348 struct net_device *upper_dev,
4349 void *upper_priv, void *upper_info,
4350 struct netlink_ext_ack *extack);
4351 void netdev_upper_dev_unlink(struct net_device *dev,
4352 struct net_device *upper_dev);
4353 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4354 struct net_device *new_dev,
4355 struct net_device *dev,
4356 struct netlink_ext_ack *extack);
4357 void netdev_adjacent_change_commit(struct net_device *old_dev,
4358 struct net_device *new_dev,
4359 struct net_device *dev);
4360 void netdev_adjacent_change_abort(struct net_device *old_dev,
4361 struct net_device *new_dev,
4362 struct net_device *dev);
4363 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4364 void *netdev_lower_dev_get_private(struct net_device *dev,
4365 struct net_device *lower_dev);
4366 void netdev_lower_state_changed(struct net_device *lower_dev,
4367 void *lower_state_info);
4369 /* RSS keys are 40 or 52 bytes long */
4370 #define NETDEV_RSS_KEY_LEN 52
4371 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4372 void netdev_rss_key_fill(void *buffer, size_t len);
4374 int skb_checksum_help(struct sk_buff *skb);
4375 int skb_crc32c_csum_help(struct sk_buff *skb);
4376 int skb_csum_hwoffload_help(struct sk_buff *skb,
4377 const netdev_features_t features);
4379 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4380 netdev_features_t features, bool tx_path);
4381 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4382 netdev_features_t features);
4384 struct netdev_bonding_info {
4389 struct netdev_notifier_bonding_info {
4390 struct netdev_notifier_info info; /* must be first */
4391 struct netdev_bonding_info bonding_info;
4394 void netdev_bonding_info_change(struct net_device *dev,
4395 struct netdev_bonding_info *bonding_info);
4397 #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
4398 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
4400 static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
4407 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4409 return __skb_gso_segment(skb, features, true);
4411 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4413 static inline bool can_checksum_protocol(netdev_features_t features,
4416 if (protocol == htons(ETH_P_FCOE))
4417 return !!(features & NETIF_F_FCOE_CRC);
4419 /* Assume this is an IP checksum (not SCTP CRC) */
4421 if (features & NETIF_F_HW_CSUM) {
4422 /* Can checksum everything */
4427 case htons(ETH_P_IP):
4428 return !!(features & NETIF_F_IP_CSUM);
4429 case htons(ETH_P_IPV6):
4430 return !!(features & NETIF_F_IPV6_CSUM);
4437 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4439 static inline void netdev_rx_csum_fault(struct net_device *dev,
4440 struct sk_buff *skb)
4444 /* rx skb timestamps */
4445 void net_enable_timestamp(void);
4446 void net_disable_timestamp(void);
4448 #ifdef CONFIG_PROC_FS
4449 int __init dev_proc_init(void);
4451 #define dev_proc_init() 0
4454 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4455 struct sk_buff *skb, struct net_device *dev,
4458 __this_cpu_write(softnet_data.xmit.more, more);
4459 return ops->ndo_start_xmit(skb, dev);
4462 static inline bool netdev_xmit_more(void)
4464 return __this_cpu_read(softnet_data.xmit.more);
4467 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4468 struct netdev_queue *txq, bool more)
4470 const struct net_device_ops *ops = dev->netdev_ops;
4473 rc = __netdev_start_xmit(ops, skb, dev, more);
4474 if (rc == NETDEV_TX_OK)
4475 txq_trans_update(txq);
4480 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4482 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4485 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4487 return netdev_class_create_file_ns(class_attr, NULL);
4490 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4492 netdev_class_remove_file_ns(class_attr, NULL);
4495 extern const struct kobj_ns_type_operations net_ns_type_operations;
4497 const char *netdev_drivername(const struct net_device *dev);
4499 void linkwatch_run_queue(void);
4501 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4502 netdev_features_t f2)
4504 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4505 if (f1 & NETIF_F_HW_CSUM)
4506 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4508 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4514 static inline netdev_features_t netdev_get_wanted_features(
4515 struct net_device *dev)
4517 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4519 netdev_features_t netdev_increment_features(netdev_features_t all,
4520 netdev_features_t one, netdev_features_t mask);
4522 /* Allow TSO being used on stacked device :
4523 * Performing the GSO segmentation before last device
4524 * is a performance improvement.
4526 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4527 netdev_features_t mask)
4529 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4532 int __netdev_update_features(struct net_device *dev);
4533 void netdev_update_features(struct net_device *dev);
4534 void netdev_change_features(struct net_device *dev);
4536 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4537 struct net_device *dev);
4539 netdev_features_t passthru_features_check(struct sk_buff *skb,
4540 struct net_device *dev,
4541 netdev_features_t features);
4542 netdev_features_t netif_skb_features(struct sk_buff *skb);
4544 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4546 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4548 /* check flags correspondence */
4549 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4550 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4551 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4552 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4553 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4554 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4555 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4556 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4557 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4558 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4559 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4560 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4561 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4562 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4563 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4564 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4565 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4566 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4568 return (features & feature) == feature;
4571 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4573 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4574 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4577 static inline bool netif_needs_gso(struct sk_buff *skb,
4578 netdev_features_t features)
4580 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4581 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4582 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4585 static inline void netif_set_gso_max_size(struct net_device *dev,
4588 dev->gso_max_size = size;
4591 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4592 int pulled_hlen, u16 mac_offset,
4595 skb->protocol = protocol;
4596 skb->encapsulation = 1;
4597 skb_push(skb, pulled_hlen);
4598 skb_reset_transport_header(skb);
4599 skb->mac_header = mac_offset;
4600 skb->network_header = skb->mac_header + mac_len;
4601 skb->mac_len = mac_len;
4604 static inline bool netif_is_macsec(const struct net_device *dev)
4606 return dev->priv_flags & IFF_MACSEC;
4609 static inline bool netif_is_macvlan(const struct net_device *dev)
4611 return dev->priv_flags & IFF_MACVLAN;
4614 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4616 return dev->priv_flags & IFF_MACVLAN_PORT;
4619 static inline bool netif_is_bond_master(const struct net_device *dev)
4621 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4624 static inline bool netif_is_bond_slave(const struct net_device *dev)
4626 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4629 static inline bool netif_supports_nofcs(struct net_device *dev)
4631 return dev->priv_flags & IFF_SUPP_NOFCS;
4634 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4636 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4639 static inline bool netif_is_l3_master(const struct net_device *dev)
4641 return dev->priv_flags & IFF_L3MDEV_MASTER;
4644 static inline bool netif_is_l3_slave(const struct net_device *dev)
4646 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4649 static inline bool netif_is_bridge_master(const struct net_device *dev)
4651 return dev->priv_flags & IFF_EBRIDGE;
4654 static inline bool netif_is_bridge_port(const struct net_device *dev)
4656 return dev->priv_flags & IFF_BRIDGE_PORT;
4659 static inline bool netif_is_ovs_master(const struct net_device *dev)
4661 return dev->priv_flags & IFF_OPENVSWITCH;
4664 static inline bool netif_is_ovs_port(const struct net_device *dev)
4666 return dev->priv_flags & IFF_OVS_DATAPATH;
4669 static inline bool netif_is_team_master(const struct net_device *dev)
4671 return dev->priv_flags & IFF_TEAM;
4674 static inline bool netif_is_team_port(const struct net_device *dev)
4676 return dev->priv_flags & IFF_TEAM_PORT;
4679 static inline bool netif_is_lag_master(const struct net_device *dev)
4681 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4684 static inline bool netif_is_lag_port(const struct net_device *dev)
4686 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4689 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4691 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4694 static inline bool netif_is_failover(const struct net_device *dev)
4696 return dev->priv_flags & IFF_FAILOVER;
4699 static inline bool netif_is_failover_slave(const struct net_device *dev)
4701 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4704 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4705 static inline void netif_keep_dst(struct net_device *dev)
4707 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4710 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4711 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4713 /* TODO: reserve and use an additional IFF bit, if we get more users */
4714 return dev->priv_flags & IFF_MACSEC;
4717 extern struct pernet_operations __net_initdata loopback_net_ops;
4719 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4721 /* netdev_printk helpers, similar to dev_printk */
4723 static inline const char *netdev_name(const struct net_device *dev)
4725 if (!dev->name[0] || strchr(dev->name, '%'))
4726 return "(unnamed net_device)";
4730 static inline bool netdev_unregistering(const struct net_device *dev)
4732 return dev->reg_state == NETREG_UNREGISTERING;
4735 static inline const char *netdev_reg_state(const struct net_device *dev)
4737 switch (dev->reg_state) {
4738 case NETREG_UNINITIALIZED: return " (uninitialized)";
4739 case NETREG_REGISTERED: return "";
4740 case NETREG_UNREGISTERING: return " (unregistering)";
4741 case NETREG_UNREGISTERED: return " (unregistered)";
4742 case NETREG_RELEASED: return " (released)";
4743 case NETREG_DUMMY: return " (dummy)";
4746 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4747 return " (unknown)";
4750 __printf(3, 4) __cold
4751 void netdev_printk(const char *level, const struct net_device *dev,
4752 const char *format, ...);
4753 __printf(2, 3) __cold
4754 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4755 __printf(2, 3) __cold
4756 void netdev_alert(const struct net_device *dev, const char *format, ...);
4757 __printf(2, 3) __cold
4758 void netdev_crit(const struct net_device *dev, const char *format, ...);
4759 __printf(2, 3) __cold
4760 void netdev_err(const struct net_device *dev, const char *format, ...);
4761 __printf(2, 3) __cold
4762 void netdev_warn(const struct net_device *dev, const char *format, ...);
4763 __printf(2, 3) __cold
4764 void netdev_notice(const struct net_device *dev, const char *format, ...);
4765 __printf(2, 3) __cold
4766 void netdev_info(const struct net_device *dev, const char *format, ...);
4768 #define netdev_level_once(level, dev, fmt, ...) \
4770 static bool __print_once __read_mostly; \
4772 if (!__print_once) { \
4773 __print_once = true; \
4774 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4778 #define netdev_emerg_once(dev, fmt, ...) \
4779 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4780 #define netdev_alert_once(dev, fmt, ...) \
4781 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4782 #define netdev_crit_once(dev, fmt, ...) \
4783 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4784 #define netdev_err_once(dev, fmt, ...) \
4785 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4786 #define netdev_warn_once(dev, fmt, ...) \
4787 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4788 #define netdev_notice_once(dev, fmt, ...) \
4789 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4790 #define netdev_info_once(dev, fmt, ...) \
4791 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4793 #define MODULE_ALIAS_NETDEV(device) \
4794 MODULE_ALIAS("netdev-" device)
4796 #if defined(CONFIG_DYNAMIC_DEBUG)
4797 #define netdev_dbg(__dev, format, args...) \
4799 dynamic_netdev_dbg(__dev, format, ##args); \
4801 #elif defined(DEBUG)
4802 #define netdev_dbg(__dev, format, args...) \
4803 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4805 #define netdev_dbg(__dev, format, args...) \
4808 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4812 #if defined(VERBOSE_DEBUG)
4813 #define netdev_vdbg netdev_dbg
4816 #define netdev_vdbg(dev, format, args...) \
4819 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4825 * netdev_WARN() acts like dev_printk(), but with the key difference
4826 * of using a WARN/WARN_ON to get the message out, including the
4827 * file/line information and a backtrace.
4829 #define netdev_WARN(dev, format, args...) \
4830 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4831 netdev_reg_state(dev), ##args)
4833 #define netdev_WARN_ONCE(dev, format, args...) \
4834 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4835 netdev_reg_state(dev), ##args)
4837 /* netif printk helpers, similar to netdev_printk */
4839 #define netif_printk(priv, type, level, dev, fmt, args...) \
4841 if (netif_msg_##type(priv)) \
4842 netdev_printk(level, (dev), fmt, ##args); \
4845 #define netif_level(level, priv, type, dev, fmt, args...) \
4847 if (netif_msg_##type(priv)) \
4848 netdev_##level(dev, fmt, ##args); \
4851 #define netif_emerg(priv, type, dev, fmt, args...) \
4852 netif_level(emerg, priv, type, dev, fmt, ##args)
4853 #define netif_alert(priv, type, dev, fmt, args...) \
4854 netif_level(alert, priv, type, dev, fmt, ##args)
4855 #define netif_crit(priv, type, dev, fmt, args...) \
4856 netif_level(crit, priv, type, dev, fmt, ##args)
4857 #define netif_err(priv, type, dev, fmt, args...) \
4858 netif_level(err, priv, type, dev, fmt, ##args)
4859 #define netif_warn(priv, type, dev, fmt, args...) \
4860 netif_level(warn, priv, type, dev, fmt, ##args)
4861 #define netif_notice(priv, type, dev, fmt, args...) \
4862 netif_level(notice, priv, type, dev, fmt, ##args)
4863 #define netif_info(priv, type, dev, fmt, args...) \
4864 netif_level(info, priv, type, dev, fmt, ##args)
4866 #if defined(CONFIG_DYNAMIC_DEBUG)
4867 #define netif_dbg(priv, type, netdev, format, args...) \
4869 if (netif_msg_##type(priv)) \
4870 dynamic_netdev_dbg(netdev, format, ##args); \
4872 #elif defined(DEBUG)
4873 #define netif_dbg(priv, type, dev, format, args...) \
4874 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4876 #define netif_dbg(priv, type, dev, format, args...) \
4879 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4884 /* if @cond then downgrade to debug, else print at @level */
4885 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4888 netif_dbg(priv, type, netdev, fmt, ##args); \
4890 netif_ ## level(priv, type, netdev, fmt, ##args); \
4893 #if defined(VERBOSE_DEBUG)
4894 #define netif_vdbg netif_dbg
4896 #define netif_vdbg(priv, type, dev, format, args...) \
4899 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4905 * The list of packet types we will receive (as opposed to discard)
4906 * and the routines to invoke.
4908 * Why 16. Because with 16 the only overlap we get on a hash of the
4909 * low nibble of the protocol value is RARP/SNAP/X.25.
4923 #define PTYPE_HASH_SIZE (16)
4924 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4926 extern struct net_device *blackhole_netdev;
4928 #endif /* _LINUX_NETDEVICE_H */