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
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 <net/net_namespace.h>
39 #include <net/dcbnl.h>
41 #include <net/netprio_cgroup.h>
44 #include <linux/netdev_features.h>
45 #include <linux/neighbour.h>
46 #include <uapi/linux/netdevice.h>
47 #include <uapi/linux/if_bonding.h>
48 #include <uapi/linux/pkt_cls.h>
49 #include <linux/hashtable.h>
56 struct ip_tunnel_parm;
57 struct macsec_context;
63 /* 802.15.4 specific */
66 /* UDP Tunnel offloads */
67 struct udp_tunnel_info;
68 struct udp_tunnel_nic_info;
69 struct udp_tunnel_nic;
73 void synchronize_net(void);
74 void netdev_set_default_ethtool_ops(struct net_device *dev,
75 const struct ethtool_ops *ops);
77 /* Backlog congestion levels */
78 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
79 #define NET_RX_DROP 1 /* packet dropped */
81 #define MAX_NEST_DEV 8
84 * Transmit return codes: transmit return codes originate from three different
87 * - qdisc return codes
88 * - driver transmit return codes
91 * Drivers are allowed to return any one of those in their hard_start_xmit()
92 * function. Real network devices commonly used with qdiscs should only return
93 * the driver transmit return codes though - when qdiscs are used, the actual
94 * transmission happens asynchronously, so the value is not propagated to
95 * higher layers. Virtual network devices transmit synchronously; in this case
96 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
97 * others are propagated to higher layers.
100 /* qdisc ->enqueue() return codes. */
101 #define NET_XMIT_SUCCESS 0x00
102 #define NET_XMIT_DROP 0x01 /* skb dropped */
103 #define NET_XMIT_CN 0x02 /* congestion notification */
104 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
106 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
107 * indicates that the device will soon be dropping packets, or already drops
108 * some packets of the same priority; prompting us to send less aggressively. */
109 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
110 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
112 /* Driver transmit return codes */
113 #define NETDEV_TX_MASK 0xf0
116 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
117 NETDEV_TX_OK = 0x00, /* driver took care of packet */
118 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
120 typedef enum netdev_tx netdev_tx_t;
123 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
124 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
126 static inline bool dev_xmit_complete(int rc)
129 * Positive cases with an skb consumed by a driver:
130 * - successful transmission (rc == NETDEV_TX_OK)
131 * - error while transmitting (rc < 0)
132 * - error while queueing to a different device (rc & NET_XMIT_MASK)
134 if (likely(rc < NET_XMIT_MASK))
141 * Compute the worst-case header length according to the protocols
145 #if defined(CONFIG_HYPERV_NET)
146 # define LL_MAX_HEADER 128
147 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
148 # if defined(CONFIG_MAC80211_MESH)
149 # define LL_MAX_HEADER 128
151 # define LL_MAX_HEADER 96
154 # define LL_MAX_HEADER 32
157 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
158 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
159 #define MAX_HEADER LL_MAX_HEADER
161 #define MAX_HEADER (LL_MAX_HEADER + 48)
165 * Old network device statistics. Fields are native words
166 * (unsigned long) so they can be read and written atomically.
169 struct net_device_stats {
170 unsigned long rx_packets;
171 unsigned long tx_packets;
172 unsigned long rx_bytes;
173 unsigned long tx_bytes;
174 unsigned long rx_errors;
175 unsigned long tx_errors;
176 unsigned long rx_dropped;
177 unsigned long tx_dropped;
178 unsigned long multicast;
179 unsigned long collisions;
180 unsigned long rx_length_errors;
181 unsigned long rx_over_errors;
182 unsigned long rx_crc_errors;
183 unsigned long rx_frame_errors;
184 unsigned long rx_fifo_errors;
185 unsigned long rx_missed_errors;
186 unsigned long tx_aborted_errors;
187 unsigned long tx_carrier_errors;
188 unsigned long tx_fifo_errors;
189 unsigned long tx_heartbeat_errors;
190 unsigned long tx_window_errors;
191 unsigned long rx_compressed;
192 unsigned long tx_compressed;
196 #include <linux/cache.h>
197 #include <linux/skbuff.h>
200 #include <linux/static_key.h>
201 extern struct static_key_false rps_needed;
202 extern struct static_key_false rfs_needed;
209 struct netdev_hw_addr {
210 struct list_head list;
211 unsigned char addr[MAX_ADDR_LEN];
213 #define NETDEV_HW_ADDR_T_LAN 1
214 #define NETDEV_HW_ADDR_T_SAN 2
215 #define NETDEV_HW_ADDR_T_UNICAST 3
216 #define NETDEV_HW_ADDR_T_MULTICAST 4
221 struct rcu_head rcu_head;
224 struct netdev_hw_addr_list {
225 struct list_head list;
229 #define netdev_hw_addr_list_count(l) ((l)->count)
230 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
231 #define netdev_hw_addr_list_for_each(ha, l) \
232 list_for_each_entry(ha, &(l)->list, list)
234 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
235 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
236 #define netdev_for_each_uc_addr(ha, dev) \
237 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
239 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
240 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
241 #define netdev_for_each_mc_addr(ha, dev) \
242 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
248 /* cached hardware header; allow for machine alignment needs. */
249 #define HH_DATA_MOD 16
250 #define HH_DATA_OFF(__len) \
251 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
252 #define HH_DATA_ALIGN(__len) \
253 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
254 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
257 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
259 * dev->hard_header_len ? (dev->hard_header_len +
260 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
262 * We could use other alignment values, but we must maintain the
263 * relationship HH alignment <= LL alignment.
265 #define LL_RESERVED_SPACE(dev) \
266 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
268 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
271 int (*create) (struct sk_buff *skb, struct net_device *dev,
272 unsigned short type, const void *daddr,
273 const void *saddr, unsigned int len);
274 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
275 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
276 void (*cache_update)(struct hh_cache *hh,
277 const struct net_device *dev,
278 const unsigned char *haddr);
279 bool (*validate)(const char *ll_header, unsigned int len);
280 __be16 (*parse_protocol)(const struct sk_buff *skb);
283 /* These flag bits are private to the generic network queueing
284 * layer; they may not be explicitly referenced by any other
288 enum netdev_state_t {
290 __LINK_STATE_PRESENT,
291 __LINK_STATE_NOCARRIER,
292 __LINK_STATE_LINKWATCH_PENDING,
293 __LINK_STATE_DORMANT,
294 __LINK_STATE_TESTING,
299 * This structure holds boot-time configured netdevice settings. They
300 * are then used in the device probing.
302 struct netdev_boot_setup {
306 #define NETDEV_BOOT_SETUP_MAX 8
308 int __init netdev_boot_setup(char *str);
311 struct list_head list;
316 * size of gro hash buckets, must less than bit number of
317 * napi_struct::gro_bitmask
319 #define GRO_HASH_BUCKETS 8
322 * Structure for NAPI scheduling similar to tasklet but with weighting
325 /* The poll_list must only be managed by the entity which
326 * changes the state of the NAPI_STATE_SCHED bit. This means
327 * whoever atomically sets that bit can add this napi_struct
328 * to the per-CPU poll_list, and whoever clears that bit
329 * can remove from the list right before clearing the bit.
331 struct list_head poll_list;
335 int defer_hard_irqs_count;
336 unsigned long gro_bitmask;
337 int (*poll)(struct napi_struct *, int);
338 #ifdef CONFIG_NETPOLL
341 struct net_device *dev;
342 struct gro_list gro_hash[GRO_HASH_BUCKETS];
344 struct list_head rx_list; /* Pending GRO_NORMAL skbs */
345 int rx_count; /* length of rx_list */
346 struct hrtimer timer;
347 struct list_head dev_list;
348 struct hlist_node napi_hash_node;
349 unsigned int napi_id;
353 NAPI_STATE_SCHED, /* Poll is scheduled */
354 NAPI_STATE_MISSED, /* reschedule a napi */
355 NAPI_STATE_DISABLE, /* Disable pending */
356 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
357 NAPI_STATE_LISTED, /* NAPI added to system lists */
358 NAPI_STATE_NO_BUSY_POLL, /* Do not add in napi_hash, no busy polling */
359 NAPI_STATE_IN_BUSY_POLL, /* sk_busy_loop() owns this NAPI */
360 NAPI_STATE_PREFER_BUSY_POLL, /* prefer busy-polling over softirq processing*/
364 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
365 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
366 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
367 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
368 NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED),
369 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
370 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
371 NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL),
382 typedef enum gro_result gro_result_t;
385 * enum rx_handler_result - Possible return values for rx_handlers.
386 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
388 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
389 * case skb->dev was changed by rx_handler.
390 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
391 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
393 * rx_handlers are functions called from inside __netif_receive_skb(), to do
394 * special processing of the skb, prior to delivery to protocol handlers.
396 * Currently, a net_device can only have a single rx_handler registered. Trying
397 * to register a second rx_handler will return -EBUSY.
399 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
400 * To unregister a rx_handler on a net_device, use
401 * netdev_rx_handler_unregister().
403 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
406 * If the rx_handler consumed the skb in some way, it should return
407 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
408 * the skb to be delivered in some other way.
410 * If the rx_handler changed skb->dev, to divert the skb to another
411 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
412 * new device will be called if it exists.
414 * If the rx_handler decides the skb should be ignored, it should return
415 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
416 * are registered on exact device (ptype->dev == skb->dev).
418 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
419 * delivered, it should return RX_HANDLER_PASS.
421 * A device without a registered rx_handler will behave as if rx_handler
422 * returned RX_HANDLER_PASS.
425 enum rx_handler_result {
431 typedef enum rx_handler_result rx_handler_result_t;
432 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
434 void __napi_schedule(struct napi_struct *n);
435 void __napi_schedule_irqoff(struct napi_struct *n);
437 static inline bool napi_disable_pending(struct napi_struct *n)
439 return test_bit(NAPI_STATE_DISABLE, &n->state);
442 static inline bool napi_prefer_busy_poll(struct napi_struct *n)
444 return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state);
447 bool napi_schedule_prep(struct napi_struct *n);
450 * napi_schedule - schedule NAPI poll
453 * Schedule NAPI poll routine to be called if it is not already
456 static inline void napi_schedule(struct napi_struct *n)
458 if (napi_schedule_prep(n))
463 * napi_schedule_irqoff - schedule NAPI poll
466 * Variant of napi_schedule(), assuming hard irqs are masked.
468 static inline void napi_schedule_irqoff(struct napi_struct *n)
470 if (napi_schedule_prep(n))
471 __napi_schedule_irqoff(n);
474 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
475 static inline bool napi_reschedule(struct napi_struct *napi)
477 if (napi_schedule_prep(napi)) {
478 __napi_schedule(napi);
484 bool napi_complete_done(struct napi_struct *n, int work_done);
486 * napi_complete - NAPI processing complete
489 * Mark NAPI processing as complete.
490 * Consider using napi_complete_done() instead.
491 * Return false if device should avoid rearming interrupts.
493 static inline bool napi_complete(struct napi_struct *n)
495 return napi_complete_done(n, 0);
499 * napi_disable - prevent NAPI from scheduling
502 * Stop NAPI from being scheduled on this context.
503 * Waits till any outstanding processing completes.
505 void napi_disable(struct napi_struct *n);
508 * napi_enable - enable NAPI scheduling
511 * Resume NAPI from being scheduled on this context.
512 * Must be paired with napi_disable.
514 static inline void napi_enable(struct napi_struct *n)
516 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
517 smp_mb__before_atomic();
518 clear_bit(NAPI_STATE_SCHED, &n->state);
519 clear_bit(NAPI_STATE_NPSVC, &n->state);
523 * napi_synchronize - wait until NAPI is not running
526 * Wait until NAPI is done being scheduled on this context.
527 * Waits till any outstanding processing completes but
528 * does not disable future activations.
530 static inline void napi_synchronize(const struct napi_struct *n)
532 if (IS_ENABLED(CONFIG_SMP))
533 while (test_bit(NAPI_STATE_SCHED, &n->state))
540 * napi_if_scheduled_mark_missed - if napi is running, set the
544 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
547 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
549 unsigned long val, new;
552 val = READ_ONCE(n->state);
553 if (val & NAPIF_STATE_DISABLE)
556 if (!(val & NAPIF_STATE_SCHED))
559 new = val | NAPIF_STATE_MISSED;
560 } while (cmpxchg(&n->state, val, new) != val);
565 enum netdev_queue_state_t {
566 __QUEUE_STATE_DRV_XOFF,
567 __QUEUE_STATE_STACK_XOFF,
568 __QUEUE_STATE_FROZEN,
571 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
572 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
573 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
575 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
576 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
578 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
582 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
583 * netif_tx_* functions below are used to manipulate this flag. The
584 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
585 * queue independently. The netif_xmit_*stopped functions below are called
586 * to check if the queue has been stopped by the driver or stack (either
587 * of the XOFF bits are set in the state). Drivers should not need to call
588 * netif_xmit*stopped functions, they should only be using netif_tx_*.
591 struct netdev_queue {
595 struct net_device *dev;
596 struct Qdisc __rcu *qdisc;
597 struct Qdisc *qdisc_sleeping;
601 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
604 unsigned long tx_maxrate;
606 * Number of TX timeouts for this queue
607 * (/sys/class/net/DEV/Q/trans_timeout)
609 unsigned long trans_timeout;
611 /* Subordinate device that the queue has been assigned to */
612 struct net_device *sb_dev;
613 #ifdef CONFIG_XDP_SOCKETS
614 struct xsk_buff_pool *pool;
619 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
622 * Time (in jiffies) of last Tx
624 unsigned long trans_start;
631 } ____cacheline_aligned_in_smp;
633 extern int sysctl_fb_tunnels_only_for_init_net;
634 extern int sysctl_devconf_inherit_init_net;
637 * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns
638 * == 1 : For initns only
641 static inline bool net_has_fallback_tunnels(const struct net *net)
643 return !IS_ENABLED(CONFIG_SYSCTL) ||
644 !sysctl_fb_tunnels_only_for_init_net ||
645 (net == &init_net && sysctl_fb_tunnels_only_for_init_net == 1);
648 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
650 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
657 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
659 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
666 * This structure holds an RPS map which can be of variable length. The
667 * map is an array of CPUs.
674 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
677 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
678 * tail pointer for that CPU's input queue at the time of last enqueue, and
679 * a hardware filter index.
681 struct rps_dev_flow {
684 unsigned int last_qtail;
686 #define RPS_NO_FILTER 0xffff
689 * The rps_dev_flow_table structure contains a table of flow mappings.
691 struct rps_dev_flow_table {
694 struct rps_dev_flow flows[];
696 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
697 ((_num) * sizeof(struct rps_dev_flow)))
700 * The rps_sock_flow_table contains mappings of flows to the last CPU
701 * on which they were processed by the application (set in recvmsg).
702 * Each entry is a 32bit value. Upper part is the high-order bits
703 * of flow hash, lower part is CPU number.
704 * rps_cpu_mask is used to partition the space, depending on number of
705 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
706 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
707 * meaning we use 32-6=26 bits for the hash.
709 struct rps_sock_flow_table {
712 u32 ents[] ____cacheline_aligned_in_smp;
714 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
716 #define RPS_NO_CPU 0xffff
718 extern u32 rps_cpu_mask;
719 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
721 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
725 unsigned int index = hash & table->mask;
726 u32 val = hash & ~rps_cpu_mask;
728 /* We only give a hint, preemption can change CPU under us */
729 val |= raw_smp_processor_id();
731 if (table->ents[index] != val)
732 table->ents[index] = val;
736 #ifdef CONFIG_RFS_ACCEL
737 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
740 #endif /* CONFIG_RPS */
742 /* This structure contains an instance of an RX queue. */
743 struct netdev_rx_queue {
745 struct rps_map __rcu *rps_map;
746 struct rps_dev_flow_table __rcu *rps_flow_table;
749 struct net_device *dev;
750 struct xdp_rxq_info xdp_rxq;
751 #ifdef CONFIG_XDP_SOCKETS
752 struct xsk_buff_pool *pool;
754 } ____cacheline_aligned_in_smp;
757 * RX queue sysfs structures and functions.
759 struct rx_queue_attribute {
760 struct attribute attr;
761 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
762 ssize_t (*store)(struct netdev_rx_queue *queue,
763 const char *buf, size_t len);
768 * This structure holds an XPS map which can be of variable length. The
769 * map is an array of queues.
773 unsigned int alloc_len;
777 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
778 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
779 - sizeof(struct xps_map)) / sizeof(u16))
782 * This structure holds all XPS maps for device. Maps are indexed by CPU.
784 struct xps_dev_maps {
786 struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */
789 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
790 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
792 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
793 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
795 #endif /* CONFIG_XPS */
797 #define TC_MAX_QUEUE 16
798 #define TC_BITMASK 15
799 /* HW offloaded queuing disciplines txq count and offset maps */
800 struct netdev_tc_txq {
805 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
807 * This structure is to hold information about the device
808 * configured to run FCoE protocol stack.
810 struct netdev_fcoe_hbainfo {
811 char manufacturer[64];
812 char serial_number[64];
813 char hardware_version[64];
814 char driver_version[64];
815 char optionrom_version[64];
816 char firmware_version[64];
818 char model_description[256];
822 #define MAX_PHYS_ITEM_ID_LEN 32
824 /* This structure holds a unique identifier to identify some
825 * physical item (port for example) used by a netdevice.
827 struct netdev_phys_item_id {
828 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
829 unsigned char id_len;
832 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
833 struct netdev_phys_item_id *b)
835 return a->id_len == b->id_len &&
836 memcmp(a->id, b->id, a->id_len) == 0;
839 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
841 struct net_device *sb_dev);
844 TC_SETUP_QDISC_MQPRIO,
847 TC_SETUP_CLSMATCHALL,
857 TC_SETUP_QDISC_TAPRIO,
864 /* These structures hold the attributes of bpf state that are being passed
865 * to the netdevice through the bpf op.
867 enum bpf_netdev_command {
868 /* Set or clear a bpf program used in the earliest stages of packet
869 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
870 * is responsible for calling bpf_prog_put on any old progs that are
871 * stored. In case of error, the callee need not release the new prog
872 * reference, but on success it takes ownership and must bpf_prog_put
873 * when it is no longer used.
877 /* BPF program for offload callbacks, invoked at program load time. */
878 BPF_OFFLOAD_MAP_ALLOC,
879 BPF_OFFLOAD_MAP_FREE,
883 struct bpf_prog_offload_ops;
884 struct netlink_ext_ack;
886 struct xdp_dev_bulk_queue;
896 struct bpf_xdp_entity {
897 struct bpf_prog *prog;
898 struct bpf_xdp_link *link;
902 enum bpf_netdev_command command;
907 struct bpf_prog *prog;
908 struct netlink_ext_ack *extack;
910 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
912 struct bpf_offloaded_map *offmap;
914 /* XDP_SETUP_XSK_POOL */
916 struct xsk_buff_pool *pool;
922 /* Flags for ndo_xsk_wakeup. */
923 #define XDP_WAKEUP_RX (1 << 0)
924 #define XDP_WAKEUP_TX (1 << 1)
926 #ifdef CONFIG_XFRM_OFFLOAD
928 int (*xdo_dev_state_add) (struct xfrm_state *x);
929 void (*xdo_dev_state_delete) (struct xfrm_state *x);
930 void (*xdo_dev_state_free) (struct xfrm_state *x);
931 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
932 struct xfrm_state *x);
933 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
938 struct rcu_head rcuhead;
945 struct netdev_name_node {
946 struct hlist_node hlist;
947 struct list_head list;
948 struct net_device *dev;
952 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
953 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
955 struct netdev_net_notifier {
956 struct list_head list;
957 struct notifier_block *nb;
961 * This structure defines the management hooks for network devices.
962 * The following hooks can be defined; unless noted otherwise, they are
963 * optional and can be filled with a null pointer.
965 * int (*ndo_init)(struct net_device *dev);
966 * This function is called once when a network device is registered.
967 * The network device can use this for any late stage initialization
968 * or semantic validation. It can fail with an error code which will
969 * be propagated back to register_netdev.
971 * void (*ndo_uninit)(struct net_device *dev);
972 * This function is called when device is unregistered or when registration
973 * fails. It is not called if init fails.
975 * int (*ndo_open)(struct net_device *dev);
976 * This function is called when a network device transitions to the up
979 * int (*ndo_stop)(struct net_device *dev);
980 * This function is called when a network device transitions to the down
983 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
984 * struct net_device *dev);
985 * Called when a packet needs to be transmitted.
986 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
987 * the queue before that can happen; it's for obsolete devices and weird
988 * corner cases, but the stack really does a non-trivial amount
989 * of useless work if you return NETDEV_TX_BUSY.
990 * Required; cannot be NULL.
992 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
993 * struct net_device *dev
994 * netdev_features_t features);
995 * Called by core transmit path to determine if device is capable of
996 * performing offload operations on a given packet. This is to give
997 * the device an opportunity to implement any restrictions that cannot
998 * be otherwise expressed by feature flags. The check is called with
999 * the set of features that the stack has calculated and it returns
1000 * those the driver believes to be appropriate.
1002 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
1003 * struct net_device *sb_dev);
1004 * Called to decide which queue to use when device supports multiple
1007 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
1008 * This function is called to allow device receiver to make
1009 * changes to configuration when multicast or promiscuous is enabled.
1011 * void (*ndo_set_rx_mode)(struct net_device *dev);
1012 * This function is called device changes address list filtering.
1013 * If driver handles unicast address filtering, it should set
1014 * IFF_UNICAST_FLT in its priv_flags.
1016 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1017 * This function is called when the Media Access Control address
1018 * needs to be changed. If this interface is not defined, the
1019 * MAC address can not be changed.
1021 * int (*ndo_validate_addr)(struct net_device *dev);
1022 * Test if Media Access Control address is valid for the device.
1024 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1025 * Called when a user requests an ioctl which can't be handled by
1026 * the generic interface code. If not defined ioctls return
1027 * not supported error code.
1029 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1030 * Used to set network devices bus interface parameters. This interface
1031 * is retained for legacy reasons; new devices should use the bus
1032 * interface (PCI) for low level management.
1034 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1035 * Called when a user wants to change the Maximum Transfer Unit
1038 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
1039 * Callback used when the transmitter has not made any progress
1040 * for dev->watchdog ticks.
1042 * void (*ndo_get_stats64)(struct net_device *dev,
1043 * struct rtnl_link_stats64 *storage);
1044 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1045 * Called when a user wants to get the network device usage
1046 * statistics. Drivers must do one of the following:
1047 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1048 * rtnl_link_stats64 structure passed by the caller.
1049 * 2. Define @ndo_get_stats to update a net_device_stats structure
1050 * (which should normally be dev->stats) and return a pointer to
1051 * it. The structure may be changed asynchronously only if each
1052 * field is written atomically.
1053 * 3. Update dev->stats asynchronously and atomically, and define
1054 * neither operation.
1056 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1057 * Return true if this device supports offload stats of this attr_id.
1059 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1061 * Get statistics for offload operations by attr_id. Write it into the
1062 * attr_data pointer.
1064 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1065 * If device supports VLAN filtering this function is called when a
1066 * VLAN id is registered.
1068 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1069 * If device supports VLAN filtering this function is called when a
1070 * VLAN id is unregistered.
1072 * void (*ndo_poll_controller)(struct net_device *dev);
1074 * SR-IOV management functions.
1075 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1076 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1077 * u8 qos, __be16 proto);
1078 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1080 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1081 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1082 * int (*ndo_get_vf_config)(struct net_device *dev,
1083 * int vf, struct ifla_vf_info *ivf);
1084 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1085 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1086 * struct nlattr *port[]);
1088 * Enable or disable the VF ability to query its RSS Redirection Table and
1089 * Hash Key. This is needed since on some devices VF share this information
1090 * with PF and querying it may introduce a theoretical security risk.
1091 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1092 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1093 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1095 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1096 * This is always called from the stack with the rtnl lock held and netif
1097 * tx queues stopped. This allows the netdevice to perform queue
1098 * management safely.
1100 * Fiber Channel over Ethernet (FCoE) offload functions.
1101 * int (*ndo_fcoe_enable)(struct net_device *dev);
1102 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1103 * so the underlying device can perform whatever needed configuration or
1104 * initialization to support acceleration of FCoE traffic.
1106 * int (*ndo_fcoe_disable)(struct net_device *dev);
1107 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1108 * so the underlying device can perform whatever needed clean-ups to
1109 * stop supporting acceleration of FCoE traffic.
1111 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1112 * struct scatterlist *sgl, unsigned int sgc);
1113 * Called when the FCoE Initiator wants to initialize an I/O that
1114 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1115 * perform necessary setup and returns 1 to indicate the device is set up
1116 * successfully to perform DDP on this I/O, otherwise this returns 0.
1118 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1119 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1120 * indicated by the FC exchange id 'xid', so the underlying device can
1121 * clean up and reuse resources for later DDP requests.
1123 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1124 * struct scatterlist *sgl, unsigned int sgc);
1125 * Called when the FCoE Target wants to initialize an I/O that
1126 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1127 * perform necessary setup and returns 1 to indicate the device is set up
1128 * successfully to perform DDP on this I/O, otherwise this returns 0.
1130 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1131 * struct netdev_fcoe_hbainfo *hbainfo);
1132 * Called when the FCoE Protocol stack wants information on the underlying
1133 * device. This information is utilized by the FCoE protocol stack to
1134 * register attributes with Fiber Channel management service as per the
1135 * FC-GS Fabric Device Management Information(FDMI) specification.
1137 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1138 * Called when the underlying device wants to override default World Wide
1139 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1140 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1141 * protocol stack to use.
1144 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1145 * u16 rxq_index, u32 flow_id);
1146 * Set hardware filter for RFS. rxq_index is the target queue index;
1147 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1148 * Return the filter ID on success, or a negative error code.
1150 * Slave management functions (for bridge, bonding, etc).
1151 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1152 * Called to make another netdev an underling.
1154 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1155 * Called to release previously enslaved netdev.
1157 * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev,
1158 * struct sk_buff *skb,
1160 * Get the xmit slave of master device. If all_slaves is true, function
1161 * assume all the slaves can transmit.
1163 * Feature/offload setting functions.
1164 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1165 * netdev_features_t features);
1166 * Adjusts the requested feature flags according to device-specific
1167 * constraints, and returns the resulting flags. Must not modify
1170 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1171 * Called to update device configuration to new features. Passed
1172 * feature set might be less than what was returned by ndo_fix_features()).
1173 * Must return >0 or -errno if it changed dev->features itself.
1175 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1176 * struct net_device *dev,
1177 * const unsigned char *addr, u16 vid, u16 flags,
1178 * struct netlink_ext_ack *extack);
1179 * Adds an FDB entry to dev for addr.
1180 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1181 * struct net_device *dev,
1182 * const unsigned char *addr, u16 vid)
1183 * Deletes the FDB entry from dev coresponding to addr.
1184 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1185 * struct net_device *dev, struct net_device *filter_dev,
1187 * Used to add FDB entries to dump requests. Implementers should add
1188 * entries to skb and update idx with the number of entries.
1190 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1191 * u16 flags, struct netlink_ext_ack *extack)
1192 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1193 * struct net_device *dev, u32 filter_mask,
1195 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1198 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1199 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1200 * which do not represent real hardware may define this to allow their
1201 * userspace components to manage their virtual carrier state. Devices
1202 * that determine carrier state from physical hardware properties (eg
1203 * network cables) or protocol-dependent mechanisms (eg
1204 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1206 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1207 * struct netdev_phys_item_id *ppid);
1208 * Called to get ID of physical port of this device. If driver does
1209 * not implement this, it is assumed that the hw is not able to have
1210 * multiple net devices on single physical port.
1212 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1213 * struct netdev_phys_item_id *ppid)
1214 * Called to get the parent ID of the physical port of this device.
1216 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1217 * struct udp_tunnel_info *ti);
1218 * Called by UDP tunnel to notify a driver about the UDP port and socket
1219 * address family that a UDP tunnel is listnening to. It is called only
1220 * when a new port starts listening. The operation is protected by the
1223 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1224 * struct udp_tunnel_info *ti);
1225 * Called by UDP tunnel to notify the driver about a UDP port and socket
1226 * address family that the UDP tunnel is not listening to anymore. The
1227 * operation is protected by the RTNL.
1229 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1230 * struct net_device *dev)
1231 * Called by upper layer devices to accelerate switching or other
1232 * station functionality into hardware. 'pdev is the lowerdev
1233 * to use for the offload and 'dev' is the net device that will
1234 * back the offload. Returns a pointer to the private structure
1235 * the upper layer will maintain.
1236 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1237 * Called by upper layer device to delete the station created
1238 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1239 * the station and priv is the structure returned by the add
1241 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1242 * int queue_index, u32 maxrate);
1243 * Called when a user wants to set a max-rate limitation of specific
1245 * int (*ndo_get_iflink)(const struct net_device *dev);
1246 * Called to get the iflink value of this device.
1247 * void (*ndo_change_proto_down)(struct net_device *dev,
1249 * This function is used to pass protocol port error state information
1250 * to the switch driver. The switch driver can react to the proto_down
1251 * by doing a phys down on the associated switch port.
1252 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1253 * This function is used to get egress tunnel information for given skb.
1254 * This is useful for retrieving outer tunnel header parameters while
1256 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1257 * This function is used to specify the headroom that the skb must
1258 * consider when allocation skb during packet reception. Setting
1259 * appropriate rx headroom value allows avoiding skb head copy on
1260 * forward. Setting a negative value resets the rx headroom to the
1262 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1263 * This function is used to set or query state related to XDP on the
1264 * netdevice and manage BPF offload. See definition of
1265 * enum bpf_netdev_command for details.
1266 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1268 * This function is used to submit @n XDP packets for transmit on a
1269 * netdevice. Returns number of frames successfully transmitted, frames
1270 * that got dropped are freed/returned via xdp_return_frame().
1271 * Returns negative number, means general error invoking ndo, meaning
1272 * no frames were xmit'ed and core-caller will free all frames.
1273 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1274 * This function is used to wake up the softirq, ksoftirqd or kthread
1275 * responsible for sending and/or receiving packets on a specific
1276 * queue id bound to an AF_XDP socket. The flags field specifies if
1277 * only RX, only Tx, or both should be woken up using the flags
1278 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1279 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1280 * Get devlink port instance associated with a given netdev.
1281 * Called with a reference on the netdevice and devlink locks only,
1282 * rtnl_lock is not held.
1283 * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *p,
1285 * Add, change, delete or get information on an IPv4 tunnel.
1286 * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev);
1287 * If a device is paired with a peer device, return the peer instance.
1288 * The caller must be under RCU read context.
1290 struct net_device_ops {
1291 int (*ndo_init)(struct net_device *dev);
1292 void (*ndo_uninit)(struct net_device *dev);
1293 int (*ndo_open)(struct net_device *dev);
1294 int (*ndo_stop)(struct net_device *dev);
1295 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1296 struct net_device *dev);
1297 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1298 struct net_device *dev,
1299 netdev_features_t features);
1300 u16 (*ndo_select_queue)(struct net_device *dev,
1301 struct sk_buff *skb,
1302 struct net_device *sb_dev);
1303 void (*ndo_change_rx_flags)(struct net_device *dev,
1305 void (*ndo_set_rx_mode)(struct net_device *dev);
1306 int (*ndo_set_mac_address)(struct net_device *dev,
1308 int (*ndo_validate_addr)(struct net_device *dev);
1309 int (*ndo_do_ioctl)(struct net_device *dev,
1310 struct ifreq *ifr, int cmd);
1311 int (*ndo_set_config)(struct net_device *dev,
1313 int (*ndo_change_mtu)(struct net_device *dev,
1315 int (*ndo_neigh_setup)(struct net_device *dev,
1316 struct neigh_parms *);
1317 void (*ndo_tx_timeout) (struct net_device *dev,
1318 unsigned int txqueue);
1320 void (*ndo_get_stats64)(struct net_device *dev,
1321 struct rtnl_link_stats64 *storage);
1322 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1323 int (*ndo_get_offload_stats)(int attr_id,
1324 const struct net_device *dev,
1326 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1328 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1329 __be16 proto, u16 vid);
1330 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1331 __be16 proto, u16 vid);
1332 #ifdef CONFIG_NET_POLL_CONTROLLER
1333 void (*ndo_poll_controller)(struct net_device *dev);
1334 int (*ndo_netpoll_setup)(struct net_device *dev,
1335 struct netpoll_info *info);
1336 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1338 int (*ndo_set_vf_mac)(struct net_device *dev,
1339 int queue, u8 *mac);
1340 int (*ndo_set_vf_vlan)(struct net_device *dev,
1341 int queue, u16 vlan,
1342 u8 qos, __be16 proto);
1343 int (*ndo_set_vf_rate)(struct net_device *dev,
1344 int vf, int min_tx_rate,
1346 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1347 int vf, bool setting);
1348 int (*ndo_set_vf_trust)(struct net_device *dev,
1349 int vf, bool setting);
1350 int (*ndo_get_vf_config)(struct net_device *dev,
1352 struct ifla_vf_info *ivf);
1353 int (*ndo_set_vf_link_state)(struct net_device *dev,
1354 int vf, int link_state);
1355 int (*ndo_get_vf_stats)(struct net_device *dev,
1357 struct ifla_vf_stats
1359 int (*ndo_set_vf_port)(struct net_device *dev,
1361 struct nlattr *port[]);
1362 int (*ndo_get_vf_port)(struct net_device *dev,
1363 int vf, struct sk_buff *skb);
1364 int (*ndo_get_vf_guid)(struct net_device *dev,
1366 struct ifla_vf_guid *node_guid,
1367 struct ifla_vf_guid *port_guid);
1368 int (*ndo_set_vf_guid)(struct net_device *dev,
1371 int (*ndo_set_vf_rss_query_en)(
1372 struct net_device *dev,
1373 int vf, bool setting);
1374 int (*ndo_setup_tc)(struct net_device *dev,
1375 enum tc_setup_type type,
1377 #if IS_ENABLED(CONFIG_FCOE)
1378 int (*ndo_fcoe_enable)(struct net_device *dev);
1379 int (*ndo_fcoe_disable)(struct net_device *dev);
1380 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1382 struct scatterlist *sgl,
1384 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1386 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1388 struct scatterlist *sgl,
1390 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1391 struct netdev_fcoe_hbainfo *hbainfo);
1394 #if IS_ENABLED(CONFIG_LIBFCOE)
1395 #define NETDEV_FCOE_WWNN 0
1396 #define NETDEV_FCOE_WWPN 1
1397 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1398 u64 *wwn, int type);
1401 #ifdef CONFIG_RFS_ACCEL
1402 int (*ndo_rx_flow_steer)(struct net_device *dev,
1403 const struct sk_buff *skb,
1407 int (*ndo_add_slave)(struct net_device *dev,
1408 struct net_device *slave_dev,
1409 struct netlink_ext_ack *extack);
1410 int (*ndo_del_slave)(struct net_device *dev,
1411 struct net_device *slave_dev);
1412 struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev,
1413 struct sk_buff *skb,
1415 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1416 netdev_features_t features);
1417 int (*ndo_set_features)(struct net_device *dev,
1418 netdev_features_t features);
1419 int (*ndo_neigh_construct)(struct net_device *dev,
1420 struct neighbour *n);
1421 void (*ndo_neigh_destroy)(struct net_device *dev,
1422 struct neighbour *n);
1424 int (*ndo_fdb_add)(struct ndmsg *ndm,
1425 struct nlattr *tb[],
1426 struct net_device *dev,
1427 const unsigned char *addr,
1430 struct netlink_ext_ack *extack);
1431 int (*ndo_fdb_del)(struct ndmsg *ndm,
1432 struct nlattr *tb[],
1433 struct net_device *dev,
1434 const unsigned char *addr,
1436 int (*ndo_fdb_dump)(struct sk_buff *skb,
1437 struct netlink_callback *cb,
1438 struct net_device *dev,
1439 struct net_device *filter_dev,
1441 int (*ndo_fdb_get)(struct sk_buff *skb,
1442 struct nlattr *tb[],
1443 struct net_device *dev,
1444 const unsigned char *addr,
1445 u16 vid, u32 portid, u32 seq,
1446 struct netlink_ext_ack *extack);
1447 int (*ndo_bridge_setlink)(struct net_device *dev,
1448 struct nlmsghdr *nlh,
1450 struct netlink_ext_ack *extack);
1451 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1453 struct net_device *dev,
1456 int (*ndo_bridge_dellink)(struct net_device *dev,
1457 struct nlmsghdr *nlh,
1459 int (*ndo_change_carrier)(struct net_device *dev,
1461 int (*ndo_get_phys_port_id)(struct net_device *dev,
1462 struct netdev_phys_item_id *ppid);
1463 int (*ndo_get_port_parent_id)(struct net_device *dev,
1464 struct netdev_phys_item_id *ppid);
1465 int (*ndo_get_phys_port_name)(struct net_device *dev,
1466 char *name, size_t len);
1467 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1468 struct udp_tunnel_info *ti);
1469 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1470 struct udp_tunnel_info *ti);
1471 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1472 struct net_device *dev);
1473 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1476 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1479 int (*ndo_get_iflink)(const struct net_device *dev);
1480 int (*ndo_change_proto_down)(struct net_device *dev,
1482 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1483 struct sk_buff *skb);
1484 void (*ndo_set_rx_headroom)(struct net_device *dev,
1485 int needed_headroom);
1486 int (*ndo_bpf)(struct net_device *dev,
1487 struct netdev_bpf *bpf);
1488 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1489 struct xdp_frame **xdp,
1491 int (*ndo_xsk_wakeup)(struct net_device *dev,
1492 u32 queue_id, u32 flags);
1493 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1494 int (*ndo_tunnel_ctl)(struct net_device *dev,
1495 struct ip_tunnel_parm *p, int cmd);
1496 struct net_device * (*ndo_get_peer_dev)(struct net_device *dev);
1500 * enum netdev_priv_flags - &struct net_device priv_flags
1502 * These are the &struct net_device, they are only set internally
1503 * by drivers and used in the kernel. These flags are invisible to
1504 * userspace; this means that the order of these flags can change
1505 * during any kernel release.
1507 * You should have a pretty good reason to be extending these flags.
1509 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1510 * @IFF_EBRIDGE: Ethernet bridging device
1511 * @IFF_BONDING: bonding master or slave
1512 * @IFF_ISATAP: ISATAP interface (RFC4214)
1513 * @IFF_WAN_HDLC: WAN HDLC device
1514 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1516 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1517 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1518 * @IFF_MACVLAN_PORT: device used as macvlan port
1519 * @IFF_BRIDGE_PORT: device used as bridge port
1520 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1521 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1522 * @IFF_UNICAST_FLT: Supports unicast filtering
1523 * @IFF_TEAM_PORT: device used as team port
1524 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1525 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1526 * change when it's running
1527 * @IFF_MACVLAN: Macvlan device
1528 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1529 * underlying stacked devices
1530 * @IFF_L3MDEV_MASTER: device is an L3 master device
1531 * @IFF_NO_QUEUE: device can run without qdisc attached
1532 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1533 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1534 * @IFF_TEAM: device is a team device
1535 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1536 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1537 * entity (i.e. the master device for bridged veth)
1538 * @IFF_MACSEC: device is a MACsec device
1539 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1540 * @IFF_FAILOVER: device is a failover master device
1541 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1542 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1543 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1545 enum netdev_priv_flags {
1546 IFF_802_1Q_VLAN = 1<<0,
1550 IFF_WAN_HDLC = 1<<4,
1551 IFF_XMIT_DST_RELEASE = 1<<5,
1552 IFF_DONT_BRIDGE = 1<<6,
1553 IFF_DISABLE_NETPOLL = 1<<7,
1554 IFF_MACVLAN_PORT = 1<<8,
1555 IFF_BRIDGE_PORT = 1<<9,
1556 IFF_OVS_DATAPATH = 1<<10,
1557 IFF_TX_SKB_SHARING = 1<<11,
1558 IFF_UNICAST_FLT = 1<<12,
1559 IFF_TEAM_PORT = 1<<13,
1560 IFF_SUPP_NOFCS = 1<<14,
1561 IFF_LIVE_ADDR_CHANGE = 1<<15,
1562 IFF_MACVLAN = 1<<16,
1563 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1564 IFF_L3MDEV_MASTER = 1<<18,
1565 IFF_NO_QUEUE = 1<<19,
1566 IFF_OPENVSWITCH = 1<<20,
1567 IFF_L3MDEV_SLAVE = 1<<21,
1569 IFF_RXFH_CONFIGURED = 1<<23,
1570 IFF_PHONY_HEADROOM = 1<<24,
1572 IFF_NO_RX_HANDLER = 1<<26,
1573 IFF_FAILOVER = 1<<27,
1574 IFF_FAILOVER_SLAVE = 1<<28,
1575 IFF_L3MDEV_RX_HANDLER = 1<<29,
1576 IFF_LIVE_RENAME_OK = 1<<30,
1579 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1580 #define IFF_EBRIDGE IFF_EBRIDGE
1581 #define IFF_BONDING IFF_BONDING
1582 #define IFF_ISATAP IFF_ISATAP
1583 #define IFF_WAN_HDLC IFF_WAN_HDLC
1584 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1585 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1586 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1587 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1588 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1589 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1590 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1591 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1592 #define IFF_TEAM_PORT IFF_TEAM_PORT
1593 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1594 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1595 #define IFF_MACVLAN IFF_MACVLAN
1596 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1597 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1598 #define IFF_NO_QUEUE IFF_NO_QUEUE
1599 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1600 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1601 #define IFF_TEAM IFF_TEAM
1602 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1603 #define IFF_MACSEC IFF_MACSEC
1604 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1605 #define IFF_FAILOVER IFF_FAILOVER
1606 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1607 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1608 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1611 * struct net_device - The DEVICE structure.
1613 * Actually, this whole structure is a big mistake. It mixes I/O
1614 * data with strictly "high-level" data, and it has to know about
1615 * almost every data structure used in the INET module.
1617 * @name: This is the first field of the "visible" part of this structure
1618 * (i.e. as seen by users in the "Space.c" file). It is the name
1621 * @name_node: Name hashlist node
1622 * @ifalias: SNMP alias
1623 * @mem_end: Shared memory end
1624 * @mem_start: Shared memory start
1625 * @base_addr: Device I/O address
1626 * @irq: Device IRQ number
1628 * @state: Generic network queuing layer state, see netdev_state_t
1629 * @dev_list: The global list of network devices
1630 * @napi_list: List entry used for polling NAPI devices
1631 * @unreg_list: List entry when we are unregistering the
1632 * device; see the function unregister_netdev
1633 * @close_list: List entry used when we are closing the device
1634 * @ptype_all: Device-specific packet handlers for all protocols
1635 * @ptype_specific: Device-specific, protocol-specific packet handlers
1637 * @adj_list: Directly linked devices, like slaves for bonding
1638 * @features: Currently active device features
1639 * @hw_features: User-changeable features
1641 * @wanted_features: User-requested features
1642 * @vlan_features: Mask of features inheritable by VLAN devices
1644 * @hw_enc_features: Mask of features inherited by encapsulating devices
1645 * This field indicates what encapsulation
1646 * offloads the hardware is capable of doing,
1647 * and drivers will need to set them appropriately.
1649 * @mpls_features: Mask of features inheritable by MPLS
1650 * @gso_partial_features: value(s) from NETIF_F_GSO\*
1652 * @ifindex: interface index
1653 * @group: The group the device belongs to
1655 * @stats: Statistics struct, which was left as a legacy, use
1656 * rtnl_link_stats64 instead
1658 * @rx_dropped: Dropped packets by core network,
1659 * do not use this in drivers
1660 * @tx_dropped: Dropped packets by core network,
1661 * do not use this in drivers
1662 * @rx_nohandler: nohandler dropped packets by core network on
1663 * inactive devices, do not use this in drivers
1664 * @carrier_up_count: Number of times the carrier has been up
1665 * @carrier_down_count: Number of times the carrier has been down
1667 * @wireless_handlers: List of functions to handle Wireless Extensions,
1669 * see <net/iw_handler.h> for details.
1670 * @wireless_data: Instance data managed by the core of wireless extensions
1672 * @netdev_ops: Includes several pointers to callbacks,
1673 * if one wants to override the ndo_*() functions
1674 * @ethtool_ops: Management operations
1675 * @l3mdev_ops: Layer 3 master device operations
1676 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1677 * discovery handling. Necessary for e.g. 6LoWPAN.
1678 * @xfrmdev_ops: Transformation offload operations
1679 * @tlsdev_ops: Transport Layer Security offload operations
1680 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1681 * of Layer 2 headers.
1683 * @flags: Interface flags (a la BSD)
1684 * @priv_flags: Like 'flags' but invisible to userspace,
1685 * see if.h for the definitions
1686 * @gflags: Global flags ( kept as legacy )
1687 * @padded: How much padding added by alloc_netdev()
1688 * @operstate: RFC2863 operstate
1689 * @link_mode: Mapping policy to operstate
1690 * @if_port: Selectable AUI, TP, ...
1692 * @mtu: Interface MTU value
1693 * @min_mtu: Interface Minimum MTU value
1694 * @max_mtu: Interface Maximum MTU value
1695 * @type: Interface hardware type
1696 * @hard_header_len: Maximum hardware header length.
1697 * @min_header_len: Minimum hardware header length
1699 * @needed_headroom: Extra headroom the hardware may need, but not in all
1700 * cases can this be guaranteed
1701 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1702 * cases can this be guaranteed. Some cases also use
1703 * LL_MAX_HEADER instead to allocate the skb
1705 * interface address info:
1707 * @perm_addr: Permanent hw address
1708 * @addr_assign_type: Hw address assignment type
1709 * @addr_len: Hardware address length
1710 * @upper_level: Maximum depth level of upper devices.
1711 * @lower_level: Maximum depth level of lower devices.
1712 * @neigh_priv_len: Used in neigh_alloc()
1713 * @dev_id: Used to differentiate devices that share
1714 * the same link layer address
1715 * @dev_port: Used to differentiate devices that share
1717 * @addr_list_lock: XXX: need comments on this one
1718 * @name_assign_type: network interface name assignment type
1719 * @uc_promisc: Counter that indicates promiscuous mode
1720 * has been enabled due to the need to listen to
1721 * additional unicast addresses in a device that
1722 * does not implement ndo_set_rx_mode()
1723 * @uc: unicast mac addresses
1724 * @mc: multicast mac addresses
1725 * @dev_addrs: list of device hw addresses
1726 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1727 * @promiscuity: Number of times the NIC is told to work in
1728 * promiscuous mode; if it becomes 0 the NIC will
1729 * exit promiscuous mode
1730 * @allmulti: Counter, enables or disables allmulticast mode
1732 * @vlan_info: VLAN info
1733 * @dsa_ptr: dsa specific data
1734 * @tipc_ptr: TIPC specific data
1735 * @atalk_ptr: AppleTalk link
1736 * @ip_ptr: IPv4 specific data
1737 * @dn_ptr: DECnet specific data
1738 * @ip6_ptr: IPv6 specific data
1739 * @ax25_ptr: AX.25 specific data
1740 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1741 * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network
1743 * @mpls_ptr: mpls_dev struct pointer
1745 * @dev_addr: Hw address (before bcast,
1746 * because most packets are unicast)
1748 * @_rx: Array of RX queues
1749 * @num_rx_queues: Number of RX queues
1750 * allocated at register_netdev() time
1751 * @real_num_rx_queues: Number of RX queues currently active in device
1752 * @xdp_prog: XDP sockets filter program pointer
1753 * @gro_flush_timeout: timeout for GRO layer in NAPI
1754 * @napi_defer_hard_irqs: If not zero, provides a counter that would
1755 * allow to avoid NIC hard IRQ, on busy queues.
1757 * @rx_handler: handler for received packets
1758 * @rx_handler_data: XXX: need comments on this one
1759 * @miniq_ingress: ingress/clsact qdisc specific data for
1760 * ingress processing
1761 * @ingress_queue: XXX: need comments on this one
1762 * @nf_hooks_ingress: netfilter hooks executed for ingress packets
1763 * @broadcast: hw bcast address
1765 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1766 * indexed by RX queue number. Assigned by driver.
1767 * This must only be set if the ndo_rx_flow_steer
1768 * operation is defined
1769 * @index_hlist: Device index hash chain
1771 * @_tx: Array of TX queues
1772 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1773 * @real_num_tx_queues: Number of TX queues currently active in device
1774 * @qdisc: Root qdisc from userspace point of view
1775 * @tx_queue_len: Max frames per queue allowed
1776 * @tx_global_lock: XXX: need comments on this one
1777 * @xdp_bulkq: XDP device bulk queue
1778 * @xps_cpus_map: all CPUs map for XPS device
1779 * @xps_rxqs_map: all RXQs map for XPS device
1781 * @xps_maps: XXX: need comments on this one
1782 * @miniq_egress: clsact qdisc specific data for
1784 * @qdisc_hash: qdisc hash table
1785 * @watchdog_timeo: Represents the timeout that is used by
1786 * the watchdog (see dev_watchdog())
1787 * @watchdog_timer: List of timers
1789 * @proto_down_reason: reason a netdev interface is held down
1790 * @pcpu_refcnt: Number of references to this device
1791 * @todo_list: Delayed register/unregister
1792 * @link_watch_list: XXX: need comments on this one
1794 * @reg_state: Register/unregister state machine
1795 * @dismantle: Device is going to be freed
1796 * @rtnl_link_state: This enum represents the phases of creating
1799 * @needs_free_netdev: Should unregister perform free_netdev?
1800 * @priv_destructor: Called from unregister
1801 * @npinfo: XXX: need comments on this one
1802 * @nd_net: Network namespace this network device is inside
1804 * @ml_priv: Mid-layer private
1805 * @lstats: Loopback statistics
1806 * @tstats: Tunnel statistics
1807 * @dstats: Dummy statistics
1808 * @vstats: Virtual ethernet statistics
1813 * @dev: Class/net/name entry
1814 * @sysfs_groups: Space for optional device, statistics and wireless
1817 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1818 * @rtnl_link_ops: Rtnl_link_ops
1820 * @gso_max_size: Maximum size of generic segmentation offload
1821 * @gso_max_segs: Maximum number of segments that can be passed to the
1824 * @dcbnl_ops: Data Center Bridging netlink ops
1825 * @num_tc: Number of traffic classes in the net device
1826 * @tc_to_txq: XXX: need comments on this one
1827 * @prio_tc_map: XXX: need comments on this one
1829 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1831 * @priomap: XXX: need comments on this one
1832 * @phydev: Physical device may attach itself
1833 * for hardware timestamping
1834 * @sfp_bus: attached &struct sfp_bus structure.
1836 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1837 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1839 * @proto_down: protocol port state information can be sent to the
1840 * switch driver and used to set the phys state of the
1843 * @wol_enabled: Wake-on-LAN is enabled
1845 * @net_notifier_list: List of per-net netdev notifier block
1846 * that follow this device when it is moved
1847 * to another network namespace.
1849 * @macsec_ops: MACsec offloading ops
1851 * @udp_tunnel_nic_info: static structure describing the UDP tunnel
1852 * offload capabilities of the device
1853 * @udp_tunnel_nic: UDP tunnel offload state
1854 * @xdp_state: stores info on attached XDP BPF programs
1856 * @nested_level: Used as as a parameter of spin_lock_nested() of
1857 * dev->addr_list_lock.
1858 * @unlink_list: As netif_addr_lock() can be called recursively,
1859 * keep a list of interfaces to be deleted.
1861 * FIXME: cleanup struct net_device such that network protocol info
1866 char name[IFNAMSIZ];
1867 struct netdev_name_node *name_node;
1868 struct dev_ifalias __rcu *ifalias;
1870 * I/O specific fields
1871 * FIXME: Merge these and struct ifmap into one
1873 unsigned long mem_end;
1874 unsigned long mem_start;
1875 unsigned long base_addr;
1879 * Some hardware also needs these fields (state,dev_list,
1880 * napi_list,unreg_list,close_list) but they are not
1881 * part of the usual set specified in Space.c.
1884 unsigned long state;
1886 struct list_head dev_list;
1887 struct list_head napi_list;
1888 struct list_head unreg_list;
1889 struct list_head close_list;
1890 struct list_head ptype_all;
1891 struct list_head ptype_specific;
1894 struct list_head upper;
1895 struct list_head lower;
1898 netdev_features_t features;
1899 netdev_features_t hw_features;
1900 netdev_features_t wanted_features;
1901 netdev_features_t vlan_features;
1902 netdev_features_t hw_enc_features;
1903 netdev_features_t mpls_features;
1904 netdev_features_t gso_partial_features;
1909 struct net_device_stats stats;
1911 atomic_long_t rx_dropped;
1912 atomic_long_t tx_dropped;
1913 atomic_long_t rx_nohandler;
1915 /* Stats to monitor link on/off, flapping */
1916 atomic_t carrier_up_count;
1917 atomic_t carrier_down_count;
1919 #ifdef CONFIG_WIRELESS_EXT
1920 const struct iw_handler_def *wireless_handlers;
1921 struct iw_public_data *wireless_data;
1923 const struct net_device_ops *netdev_ops;
1924 const struct ethtool_ops *ethtool_ops;
1925 #ifdef CONFIG_NET_L3_MASTER_DEV
1926 const struct l3mdev_ops *l3mdev_ops;
1928 #if IS_ENABLED(CONFIG_IPV6)
1929 const struct ndisc_ops *ndisc_ops;
1932 #ifdef CONFIG_XFRM_OFFLOAD
1933 const struct xfrmdev_ops *xfrmdev_ops;
1936 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1937 const struct tlsdev_ops *tlsdev_ops;
1940 const struct header_ops *header_ops;
1943 unsigned int priv_flags;
1945 unsigned short gflags;
1946 unsigned short padded;
1948 unsigned char operstate;
1949 unsigned char link_mode;
1951 unsigned char if_port;
1954 /* Note : dev->mtu is often read without holding a lock.
1955 * Writers usually hold RTNL.
1956 * It is recommended to use READ_ONCE() to annotate the reads,
1957 * and to use WRITE_ONCE() to annotate the writes.
1960 unsigned int min_mtu;
1961 unsigned int max_mtu;
1962 unsigned short type;
1963 unsigned short hard_header_len;
1964 unsigned char min_header_len;
1965 unsigned char name_assign_type;
1967 unsigned short needed_headroom;
1968 unsigned short needed_tailroom;
1970 /* Interface address info. */
1971 unsigned char perm_addr[MAX_ADDR_LEN];
1972 unsigned char addr_assign_type;
1973 unsigned char addr_len;
1974 unsigned char upper_level;
1975 unsigned char lower_level;
1977 unsigned short neigh_priv_len;
1978 unsigned short dev_id;
1979 unsigned short dev_port;
1980 spinlock_t addr_list_lock;
1982 struct netdev_hw_addr_list uc;
1983 struct netdev_hw_addr_list mc;
1984 struct netdev_hw_addr_list dev_addrs;
1987 struct kset *queues_kset;
1989 #ifdef CONFIG_LOCKDEP
1990 struct list_head unlink_list;
1992 unsigned int promiscuity;
1993 unsigned int allmulti;
1995 #ifdef CONFIG_LOCKDEP
1996 unsigned char nested_level;
2000 /* Protocol-specific pointers */
2002 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2003 struct vlan_info __rcu *vlan_info;
2005 #if IS_ENABLED(CONFIG_NET_DSA)
2006 struct dsa_port *dsa_ptr;
2008 #if IS_ENABLED(CONFIG_TIPC)
2009 struct tipc_bearer __rcu *tipc_ptr;
2011 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
2014 struct in_device __rcu *ip_ptr;
2015 #if IS_ENABLED(CONFIG_DECNET)
2016 struct dn_dev __rcu *dn_ptr;
2018 struct inet6_dev __rcu *ip6_ptr;
2019 #if IS_ENABLED(CONFIG_AX25)
2022 struct wireless_dev *ieee80211_ptr;
2023 struct wpan_dev *ieee802154_ptr;
2024 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
2025 struct mpls_dev __rcu *mpls_ptr;
2029 * Cache lines mostly used on receive path (including eth_type_trans())
2031 /* Interface address info used in eth_type_trans() */
2032 unsigned char *dev_addr;
2034 struct netdev_rx_queue *_rx;
2035 unsigned int num_rx_queues;
2036 unsigned int real_num_rx_queues;
2038 struct bpf_prog __rcu *xdp_prog;
2039 unsigned long gro_flush_timeout;
2040 int napi_defer_hard_irqs;
2041 rx_handler_func_t __rcu *rx_handler;
2042 void __rcu *rx_handler_data;
2044 #ifdef CONFIG_NET_CLS_ACT
2045 struct mini_Qdisc __rcu *miniq_ingress;
2047 struct netdev_queue __rcu *ingress_queue;
2048 #ifdef CONFIG_NETFILTER_INGRESS
2049 struct nf_hook_entries __rcu *nf_hooks_ingress;
2052 unsigned char broadcast[MAX_ADDR_LEN];
2053 #ifdef CONFIG_RFS_ACCEL
2054 struct cpu_rmap *rx_cpu_rmap;
2056 struct hlist_node index_hlist;
2059 * Cache lines mostly used on transmit path
2061 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
2062 unsigned int num_tx_queues;
2063 unsigned int real_num_tx_queues;
2064 struct Qdisc *qdisc;
2065 unsigned int tx_queue_len;
2066 spinlock_t tx_global_lock;
2068 struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
2071 struct xps_dev_maps __rcu *xps_cpus_map;
2072 struct xps_dev_maps __rcu *xps_rxqs_map;
2074 #ifdef CONFIG_NET_CLS_ACT
2075 struct mini_Qdisc __rcu *miniq_egress;
2078 #ifdef CONFIG_NET_SCHED
2079 DECLARE_HASHTABLE (qdisc_hash, 4);
2081 /* These may be needed for future network-power-down code. */
2082 struct timer_list watchdog_timer;
2085 u32 proto_down_reason;
2087 struct list_head todo_list;
2088 int __percpu *pcpu_refcnt;
2090 struct list_head link_watch_list;
2092 enum { NETREG_UNINITIALIZED=0,
2093 NETREG_REGISTERED, /* completed register_netdevice */
2094 NETREG_UNREGISTERING, /* called unregister_netdevice */
2095 NETREG_UNREGISTERED, /* completed unregister todo */
2096 NETREG_RELEASED, /* called free_netdev */
2097 NETREG_DUMMY, /* dummy device for NAPI poll */
2103 RTNL_LINK_INITIALIZED,
2104 RTNL_LINK_INITIALIZING,
2105 } rtnl_link_state:16;
2107 bool needs_free_netdev;
2108 void (*priv_destructor)(struct net_device *dev);
2110 #ifdef CONFIG_NETPOLL
2111 struct netpoll_info __rcu *npinfo;
2114 possible_net_t nd_net;
2116 /* mid-layer private */
2119 struct pcpu_lstats __percpu *lstats;
2120 struct pcpu_sw_netstats __percpu *tstats;
2121 struct pcpu_dstats __percpu *dstats;
2124 #if IS_ENABLED(CONFIG_GARP)
2125 struct garp_port __rcu *garp_port;
2127 #if IS_ENABLED(CONFIG_MRP)
2128 struct mrp_port __rcu *mrp_port;
2132 const struct attribute_group *sysfs_groups[4];
2133 const struct attribute_group *sysfs_rx_queue_group;
2135 const struct rtnl_link_ops *rtnl_link_ops;
2137 /* for setting kernel sock attribute on TCP connection setup */
2138 #define GSO_MAX_SIZE 65536
2139 unsigned int gso_max_size;
2140 #define GSO_MAX_SEGS 65535
2144 const struct dcbnl_rtnl_ops *dcbnl_ops;
2147 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2148 u8 prio_tc_map[TC_BITMASK + 1];
2150 #if IS_ENABLED(CONFIG_FCOE)
2151 unsigned int fcoe_ddp_xid;
2153 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2154 struct netprio_map __rcu *priomap;
2156 struct phy_device *phydev;
2157 struct sfp_bus *sfp_bus;
2158 struct lock_class_key *qdisc_tx_busylock;
2159 struct lock_class_key *qdisc_running_key;
2161 unsigned wol_enabled:1;
2163 struct list_head net_notifier_list;
2165 #if IS_ENABLED(CONFIG_MACSEC)
2166 /* MACsec management functions */
2167 const struct macsec_ops *macsec_ops;
2169 const struct udp_tunnel_nic_info *udp_tunnel_nic_info;
2170 struct udp_tunnel_nic *udp_tunnel_nic;
2172 /* protected by rtnl_lock */
2173 struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE];
2175 #define to_net_dev(d) container_of(d, struct net_device, dev)
2177 static inline bool netif_elide_gro(const struct net_device *dev)
2179 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2184 #define NETDEV_ALIGN 32
2187 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2189 return dev->prio_tc_map[prio & TC_BITMASK];
2193 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2195 if (tc >= dev->num_tc)
2198 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2202 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2203 void netdev_reset_tc(struct net_device *dev);
2204 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2205 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2208 int netdev_get_num_tc(struct net_device *dev)
2213 static inline void net_prefetch(void *p)
2216 #if L1_CACHE_BYTES < 128
2217 prefetch((u8 *)p + L1_CACHE_BYTES);
2221 static inline void net_prefetchw(void *p)
2224 #if L1_CACHE_BYTES < 128
2225 prefetchw((u8 *)p + L1_CACHE_BYTES);
2229 void netdev_unbind_sb_channel(struct net_device *dev,
2230 struct net_device *sb_dev);
2231 int netdev_bind_sb_channel_queue(struct net_device *dev,
2232 struct net_device *sb_dev,
2233 u8 tc, u16 count, u16 offset);
2234 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2235 static inline int netdev_get_sb_channel(struct net_device *dev)
2237 return max_t(int, -dev->num_tc, 0);
2241 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2244 return &dev->_tx[index];
2247 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2248 const struct sk_buff *skb)
2250 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2253 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2254 void (*f)(struct net_device *,
2255 struct netdev_queue *,
2261 for (i = 0; i < dev->num_tx_queues; i++)
2262 f(dev, &dev->_tx[i], arg);
2265 #define netdev_lockdep_set_classes(dev) \
2267 static struct lock_class_key qdisc_tx_busylock_key; \
2268 static struct lock_class_key qdisc_running_key; \
2269 static struct lock_class_key qdisc_xmit_lock_key; \
2270 static struct lock_class_key dev_addr_list_lock_key; \
2273 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2274 (dev)->qdisc_running_key = &qdisc_running_key; \
2275 lockdep_set_class(&(dev)->addr_list_lock, \
2276 &dev_addr_list_lock_key); \
2277 for (i = 0; i < (dev)->num_tx_queues; i++) \
2278 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2279 &qdisc_xmit_lock_key); \
2282 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2283 struct net_device *sb_dev);
2284 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2285 struct sk_buff *skb,
2286 struct net_device *sb_dev);
2288 /* returns the headroom that the master device needs to take in account
2289 * when forwarding to this dev
2291 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2293 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2296 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2298 if (dev->netdev_ops->ndo_set_rx_headroom)
2299 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2302 /* set the device rx headroom to the dev's default */
2303 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2305 netdev_set_rx_headroom(dev, -1);
2309 * Net namespace inlines
2312 struct net *dev_net(const struct net_device *dev)
2314 return read_pnet(&dev->nd_net);
2318 void dev_net_set(struct net_device *dev, struct net *net)
2320 write_pnet(&dev->nd_net, net);
2324 * netdev_priv - access network device private data
2325 * @dev: network device
2327 * Get network device private data
2329 static inline void *netdev_priv(const struct net_device *dev)
2331 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2334 /* Set the sysfs physical device reference for the network logical device
2335 * if set prior to registration will cause a symlink during initialization.
2337 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2339 /* Set the sysfs device type for the network logical device to allow
2340 * fine-grained identification of different network device types. For
2341 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2343 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2345 /* Default NAPI poll() weight
2346 * Device drivers are strongly advised to not use bigger value
2348 #define NAPI_POLL_WEIGHT 64
2351 * netif_napi_add - initialize a NAPI context
2352 * @dev: network device
2353 * @napi: NAPI context
2354 * @poll: polling function
2355 * @weight: default weight
2357 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2358 * *any* of the other NAPI-related functions.
2360 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2361 int (*poll)(struct napi_struct *, int), int weight);
2364 * netif_tx_napi_add - initialize a NAPI context
2365 * @dev: network device
2366 * @napi: NAPI context
2367 * @poll: polling function
2368 * @weight: default weight
2370 * This variant of netif_napi_add() should be used from drivers using NAPI
2371 * to exclusively poll a TX queue.
2372 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2374 static inline void netif_tx_napi_add(struct net_device *dev,
2375 struct napi_struct *napi,
2376 int (*poll)(struct napi_struct *, int),
2379 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2380 netif_napi_add(dev, napi, poll, weight);
2384 * __netif_napi_del - remove a NAPI context
2385 * @napi: NAPI context
2387 * Warning: caller must observe RCU grace period before freeing memory
2388 * containing @napi. Drivers might want to call this helper to combine
2389 * all the needed RCU grace periods into a single one.
2391 void __netif_napi_del(struct napi_struct *napi);
2394 * netif_napi_del - remove a NAPI context
2395 * @napi: NAPI context
2397 * netif_napi_del() removes a NAPI context from the network device NAPI list
2399 static inline void netif_napi_del(struct napi_struct *napi)
2401 __netif_napi_del(napi);
2405 struct napi_gro_cb {
2406 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2409 /* Length of frag0. */
2410 unsigned int frag0_len;
2412 /* This indicates where we are processing relative to skb->data. */
2415 /* This is non-zero if the packet cannot be merged with the new skb. */
2418 /* Save the IP ID here and check when we get to the transport layer */
2421 /* Number of segments aggregated. */
2424 /* Start offset for remote checksum offload */
2425 u16 gro_remcsum_start;
2427 /* jiffies when first packet was created/queued */
2430 /* Used in ipv6_gro_receive() and foo-over-udp */
2433 /* This is non-zero if the packet may be of the same flow. */
2436 /* Used in tunnel GRO receive */
2439 /* GRO checksum is valid */
2442 /* Number of checksums via CHECKSUM_UNNECESSARY */
2447 #define NAPI_GRO_FREE 1
2448 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2450 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2453 /* Used in GRE, set in fou/gue_gro_receive */
2456 /* Used to determine if flush_id can be ignored */
2459 /* Number of gro_receive callbacks this packet already went through */
2460 u8 recursion_counter:4;
2462 /* GRO is done by frag_list pointer chaining. */
2465 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2468 /* used in skb_gro_receive() slow path */
2469 struct sk_buff *last;
2472 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2474 #define GRO_RECURSION_LIMIT 15
2475 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2477 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2480 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2481 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2482 struct list_head *head,
2483 struct sk_buff *skb)
2485 if (unlikely(gro_recursion_inc_test(skb))) {
2486 NAPI_GRO_CB(skb)->flush |= 1;
2490 return cb(head, skb);
2493 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2495 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2497 struct list_head *head,
2498 struct sk_buff *skb)
2500 if (unlikely(gro_recursion_inc_test(skb))) {
2501 NAPI_GRO_CB(skb)->flush |= 1;
2505 return cb(sk, head, skb);
2508 struct packet_type {
2509 __be16 type; /* This is really htons(ether_type). */
2510 bool ignore_outgoing;
2511 struct net_device *dev; /* NULL is wildcarded here */
2512 int (*func) (struct sk_buff *,
2513 struct net_device *,
2514 struct packet_type *,
2515 struct net_device *);
2516 void (*list_func) (struct list_head *,
2517 struct packet_type *,
2518 struct net_device *);
2519 bool (*id_match)(struct packet_type *ptype,
2521 void *af_packet_priv;
2522 struct list_head list;
2525 struct offload_callbacks {
2526 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2527 netdev_features_t features);
2528 struct sk_buff *(*gro_receive)(struct list_head *head,
2529 struct sk_buff *skb);
2530 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2533 struct packet_offload {
2534 __be16 type; /* This is really htons(ether_type). */
2536 struct offload_callbacks callbacks;
2537 struct list_head list;
2540 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2541 struct pcpu_sw_netstats {
2546 struct u64_stats_sync syncp;
2547 } __aligned(4 * sizeof(u64));
2549 struct pcpu_lstats {
2550 u64_stats_t packets;
2552 struct u64_stats_sync syncp;
2553 } __aligned(2 * sizeof(u64));
2555 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2557 static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len)
2559 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
2561 u64_stats_update_begin(&tstats->syncp);
2562 tstats->rx_bytes += len;
2563 tstats->rx_packets++;
2564 u64_stats_update_end(&tstats->syncp);
2567 static inline void dev_sw_netstats_tx_add(struct net_device *dev,
2568 unsigned int packets,
2571 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
2573 u64_stats_update_begin(&tstats->syncp);
2574 tstats->tx_bytes += len;
2575 tstats->tx_packets += packets;
2576 u64_stats_update_end(&tstats->syncp);
2579 static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2581 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2583 u64_stats_update_begin(&lstats->syncp);
2584 u64_stats_add(&lstats->bytes, len);
2585 u64_stats_inc(&lstats->packets);
2586 u64_stats_update_end(&lstats->syncp);
2589 #define __netdev_alloc_pcpu_stats(type, gfp) \
2591 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2594 for_each_possible_cpu(__cpu) { \
2595 typeof(type) *stat; \
2596 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2597 u64_stats_init(&stat->syncp); \
2603 #define netdev_alloc_pcpu_stats(type) \
2604 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2606 #define devm_netdev_alloc_pcpu_stats(dev, type) \
2608 typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\
2611 for_each_possible_cpu(__cpu) { \
2612 typeof(type) *stat; \
2613 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2614 u64_stats_init(&stat->syncp); \
2620 enum netdev_lag_tx_type {
2621 NETDEV_LAG_TX_TYPE_UNKNOWN,
2622 NETDEV_LAG_TX_TYPE_RANDOM,
2623 NETDEV_LAG_TX_TYPE_BROADCAST,
2624 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2625 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2626 NETDEV_LAG_TX_TYPE_HASH,
2629 enum netdev_lag_hash {
2630 NETDEV_LAG_HASH_NONE,
2632 NETDEV_LAG_HASH_L34,
2633 NETDEV_LAG_HASH_L23,
2634 NETDEV_LAG_HASH_E23,
2635 NETDEV_LAG_HASH_E34,
2636 NETDEV_LAG_HASH_UNKNOWN,
2639 struct netdev_lag_upper_info {
2640 enum netdev_lag_tx_type tx_type;
2641 enum netdev_lag_hash hash_type;
2644 struct netdev_lag_lower_state_info {
2649 #include <linux/notifier.h>
2651 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2652 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2656 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2658 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2659 detected a hardware crash and restarted
2660 - we can use this eg to kick tcp sessions
2662 NETDEV_CHANGE, /* Notify device state change */
2665 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2666 NETDEV_CHANGEADDR, /* notify after the address change */
2667 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2671 NETDEV_BONDING_FAILOVER,
2673 NETDEV_PRE_TYPE_CHANGE,
2674 NETDEV_POST_TYPE_CHANGE,
2677 NETDEV_NOTIFY_PEERS,
2681 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2682 NETDEV_CHANGEINFODATA,
2683 NETDEV_BONDING_INFO,
2684 NETDEV_PRECHANGEUPPER,
2685 NETDEV_CHANGELOWERSTATE,
2686 NETDEV_UDP_TUNNEL_PUSH_INFO,
2687 NETDEV_UDP_TUNNEL_DROP_INFO,
2688 NETDEV_CHANGE_TX_QUEUE_LEN,
2689 NETDEV_CVLAN_FILTER_PUSH_INFO,
2690 NETDEV_CVLAN_FILTER_DROP_INFO,
2691 NETDEV_SVLAN_FILTER_PUSH_INFO,
2692 NETDEV_SVLAN_FILTER_DROP_INFO,
2694 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2696 int register_netdevice_notifier(struct notifier_block *nb);
2697 int unregister_netdevice_notifier(struct notifier_block *nb);
2698 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2699 int unregister_netdevice_notifier_net(struct net *net,
2700 struct notifier_block *nb);
2701 int register_netdevice_notifier_dev_net(struct net_device *dev,
2702 struct notifier_block *nb,
2703 struct netdev_net_notifier *nn);
2704 int unregister_netdevice_notifier_dev_net(struct net_device *dev,
2705 struct notifier_block *nb,
2706 struct netdev_net_notifier *nn);
2708 struct netdev_notifier_info {
2709 struct net_device *dev;
2710 struct netlink_ext_ack *extack;
2713 struct netdev_notifier_info_ext {
2714 struct netdev_notifier_info info; /* must be first */
2720 struct netdev_notifier_change_info {
2721 struct netdev_notifier_info info; /* must be first */
2722 unsigned int flags_changed;
2725 struct netdev_notifier_changeupper_info {
2726 struct netdev_notifier_info info; /* must be first */
2727 struct net_device *upper_dev; /* new upper dev */
2728 bool master; /* is upper dev master */
2729 bool linking; /* is the notification for link or unlink */
2730 void *upper_info; /* upper dev info */
2733 struct netdev_notifier_changelowerstate_info {
2734 struct netdev_notifier_info info; /* must be first */
2735 void *lower_state_info; /* is lower dev state */
2738 struct netdev_notifier_pre_changeaddr_info {
2739 struct netdev_notifier_info info; /* must be first */
2740 const unsigned char *dev_addr;
2743 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2744 struct net_device *dev)
2747 info->extack = NULL;
2750 static inline struct net_device *
2751 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2756 static inline struct netlink_ext_ack *
2757 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2759 return info->extack;
2762 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2765 extern rwlock_t dev_base_lock; /* Device list lock */
2767 #define for_each_netdev(net, d) \
2768 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2769 #define for_each_netdev_reverse(net, d) \
2770 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2771 #define for_each_netdev_rcu(net, d) \
2772 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2773 #define for_each_netdev_safe(net, d, n) \
2774 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2775 #define for_each_netdev_continue(net, d) \
2776 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2777 #define for_each_netdev_continue_reverse(net, d) \
2778 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2780 #define for_each_netdev_continue_rcu(net, d) \
2781 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2782 #define for_each_netdev_in_bond_rcu(bond, slave) \
2783 for_each_netdev_rcu(&init_net, slave) \
2784 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2785 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2787 static inline struct net_device *next_net_device(struct net_device *dev)
2789 struct list_head *lh;
2793 lh = dev->dev_list.next;
2794 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2797 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2799 struct list_head *lh;
2803 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2804 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2807 static inline struct net_device *first_net_device(struct net *net)
2809 return list_empty(&net->dev_base_head) ? NULL :
2810 net_device_entry(net->dev_base_head.next);
2813 static inline struct net_device *first_net_device_rcu(struct net *net)
2815 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2817 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2820 int netdev_boot_setup_check(struct net_device *dev);
2821 unsigned long netdev_boot_base(const char *prefix, int unit);
2822 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2823 const char *hwaddr);
2824 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2825 void dev_add_pack(struct packet_type *pt);
2826 void dev_remove_pack(struct packet_type *pt);
2827 void __dev_remove_pack(struct packet_type *pt);
2828 void dev_add_offload(struct packet_offload *po);
2829 void dev_remove_offload(struct packet_offload *po);
2831 int dev_get_iflink(const struct net_device *dev);
2832 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2833 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2834 unsigned short mask);
2835 struct net_device *dev_get_by_name(struct net *net, const char *name);
2836 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2837 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2838 int dev_alloc_name(struct net_device *dev, const char *name);
2839 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2840 void dev_close(struct net_device *dev);
2841 void dev_close_many(struct list_head *head, bool unlink);
2842 void dev_disable_lro(struct net_device *dev);
2843 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2844 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2845 struct net_device *sb_dev);
2846 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2847 struct net_device *sb_dev);
2849 int dev_queue_xmit(struct sk_buff *skb);
2850 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2851 int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2853 static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
2857 ret = __dev_direct_xmit(skb, queue_id);
2858 if (!dev_xmit_complete(ret))
2863 int register_netdevice(struct net_device *dev);
2864 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2865 void unregister_netdevice_many(struct list_head *head);
2866 static inline void unregister_netdevice(struct net_device *dev)
2868 unregister_netdevice_queue(dev, NULL);
2871 int netdev_refcnt_read(const struct net_device *dev);
2872 void free_netdev(struct net_device *dev);
2873 void netdev_freemem(struct net_device *dev);
2874 int init_dummy_netdev(struct net_device *dev);
2876 struct net_device *netdev_get_xmit_slave(struct net_device *dev,
2877 struct sk_buff *skb,
2879 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2880 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2881 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2882 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2883 int netdev_get_name(struct net *net, char *name, int ifindex);
2884 int dev_restart(struct net_device *dev);
2885 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2886 int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
2888 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2890 return NAPI_GRO_CB(skb)->data_offset;
2893 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2895 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2898 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2900 NAPI_GRO_CB(skb)->data_offset += len;
2903 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2904 unsigned int offset)
2906 return NAPI_GRO_CB(skb)->frag0 + offset;
2909 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2911 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2914 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2916 NAPI_GRO_CB(skb)->frag0 = NULL;
2917 NAPI_GRO_CB(skb)->frag0_len = 0;
2920 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2921 unsigned int offset)
2923 if (!pskb_may_pull(skb, hlen))
2926 skb_gro_frag0_invalidate(skb);
2927 return skb->data + offset;
2930 static inline void *skb_gro_network_header(struct sk_buff *skb)
2932 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2933 skb_network_offset(skb);
2936 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2937 const void *start, unsigned int len)
2939 if (NAPI_GRO_CB(skb)->csum_valid)
2940 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2941 csum_partial(start, len, 0));
2944 /* GRO checksum functions. These are logical equivalents of the normal
2945 * checksum functions (in skbuff.h) except that they operate on the GRO
2946 * offsets and fields in sk_buff.
2949 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2951 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2953 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2956 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2960 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2961 skb_checksum_start_offset(skb) <
2962 skb_gro_offset(skb)) &&
2963 !skb_at_gro_remcsum_start(skb) &&
2964 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2965 (!zero_okay || check));
2968 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2971 if (NAPI_GRO_CB(skb)->csum_valid &&
2972 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2975 NAPI_GRO_CB(skb)->csum = psum;
2977 return __skb_gro_checksum_complete(skb);
2980 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2982 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2983 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2984 NAPI_GRO_CB(skb)->csum_cnt--;
2986 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2987 * verified a new top level checksum or an encapsulated one
2988 * during GRO. This saves work if we fallback to normal path.
2990 __skb_incr_checksum_unnecessary(skb);
2994 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2997 __sum16 __ret = 0; \
2998 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2999 __ret = __skb_gro_checksum_validate_complete(skb, \
3000 compute_pseudo(skb, proto)); \
3002 skb_gro_incr_csum_unnecessary(skb); \
3006 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
3007 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
3009 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
3011 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
3013 #define skb_gro_checksum_simple_validate(skb) \
3014 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
3016 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
3018 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
3019 !NAPI_GRO_CB(skb)->csum_valid);
3022 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
3025 NAPI_GRO_CB(skb)->csum = ~pseudo;
3026 NAPI_GRO_CB(skb)->csum_valid = 1;
3029 #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \
3031 if (__skb_gro_checksum_convert_check(skb)) \
3032 __skb_gro_checksum_convert(skb, \
3033 compute_pseudo(skb, proto)); \
3036 struct gro_remcsum {
3041 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
3047 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
3048 unsigned int off, size_t hdrlen,
3049 int start, int offset,
3050 struct gro_remcsum *grc,
3054 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
3056 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
3059 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
3063 ptr = skb_gro_header_fast(skb, off);
3064 if (skb_gro_header_hard(skb, off + plen)) {
3065 ptr = skb_gro_header_slow(skb, off + plen, off);
3070 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
3073 /* Adjust skb->csum since we changed the packet */
3074 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
3076 grc->offset = off + hdrlen + offset;
3082 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
3083 struct gro_remcsum *grc)
3086 size_t plen = grc->offset + sizeof(u16);
3091 ptr = skb_gro_header_fast(skb, grc->offset);
3092 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
3093 ptr = skb_gro_header_slow(skb, plen, grc->offset);
3098 remcsum_unadjust((__sum16 *)ptr, grc->delta);
3101 #ifdef CONFIG_XFRM_OFFLOAD
3102 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
3104 if (PTR_ERR(pp) != -EINPROGRESS)
3105 NAPI_GRO_CB(skb)->flush |= flush;
3107 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
3110 struct gro_remcsum *grc)
3112 if (PTR_ERR(pp) != -EINPROGRESS) {
3113 NAPI_GRO_CB(skb)->flush |= flush;
3114 skb_gro_remcsum_cleanup(skb, grc);
3115 skb->remcsum_offload = 0;
3119 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
3121 NAPI_GRO_CB(skb)->flush |= flush;
3123 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
3126 struct gro_remcsum *grc)
3128 NAPI_GRO_CB(skb)->flush |= flush;
3129 skb_gro_remcsum_cleanup(skb, grc);
3130 skb->remcsum_offload = 0;
3134 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
3135 unsigned short type,
3136 const void *daddr, const void *saddr,
3139 if (!dev->header_ops || !dev->header_ops->create)
3142 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
3145 static inline int dev_parse_header(const struct sk_buff *skb,
3146 unsigned char *haddr)
3148 const struct net_device *dev = skb->dev;
3150 if (!dev->header_ops || !dev->header_ops->parse)
3152 return dev->header_ops->parse(skb, haddr);
3155 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
3157 const struct net_device *dev = skb->dev;
3159 if (!dev->header_ops || !dev->header_ops->parse_protocol)
3161 return dev->header_ops->parse_protocol(skb);
3164 /* ll_header must have at least hard_header_len allocated */
3165 static inline bool dev_validate_header(const struct net_device *dev,
3166 char *ll_header, int len)
3168 if (likely(len >= dev->hard_header_len))
3170 if (len < dev->min_header_len)
3173 if (capable(CAP_SYS_RAWIO)) {
3174 memset(ll_header + len, 0, dev->hard_header_len - len);
3178 if (dev->header_ops && dev->header_ops->validate)
3179 return dev->header_ops->validate(ll_header, len);
3184 static inline bool dev_has_header(const struct net_device *dev)
3186 return dev->header_ops && dev->header_ops->create;
3189 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
3191 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
3192 static inline int unregister_gifconf(unsigned int family)
3194 return register_gifconf(family, NULL);
3197 #ifdef CONFIG_NET_FLOW_LIMIT
3198 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
3199 struct sd_flow_limit {
3201 unsigned int num_buckets;
3202 unsigned int history_head;
3203 u16 history[FLOW_LIMIT_HISTORY];
3207 extern int netdev_flow_limit_table_len;
3208 #endif /* CONFIG_NET_FLOW_LIMIT */
3211 * Incoming packets are placed on per-CPU queues
3213 struct softnet_data {
3214 struct list_head poll_list;
3215 struct sk_buff_head process_queue;
3218 unsigned int processed;
3219 unsigned int time_squeeze;
3220 unsigned int received_rps;
3222 struct softnet_data *rps_ipi_list;
3224 #ifdef CONFIG_NET_FLOW_LIMIT
3225 struct sd_flow_limit __rcu *flow_limit;
3227 struct Qdisc *output_queue;
3228 struct Qdisc **output_queue_tailp;
3229 struct sk_buff *completion_queue;
3230 #ifdef CONFIG_XFRM_OFFLOAD
3231 struct sk_buff_head xfrm_backlog;
3233 /* written and read only by owning cpu: */
3239 /* input_queue_head should be written by cpu owning this struct,
3240 * and only read by other cpus. Worth using a cache line.
3242 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3244 /* Elements below can be accessed between CPUs for RPS/RFS */
3245 call_single_data_t csd ____cacheline_aligned_in_smp;
3246 struct softnet_data *rps_ipi_next;
3248 unsigned int input_queue_tail;
3250 unsigned int dropped;
3251 struct sk_buff_head input_pkt_queue;
3252 struct napi_struct backlog;
3256 static inline void input_queue_head_incr(struct softnet_data *sd)
3259 sd->input_queue_head++;
3263 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3264 unsigned int *qtail)
3267 *qtail = ++sd->input_queue_tail;
3271 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3273 static inline int dev_recursion_level(void)
3275 return this_cpu_read(softnet_data.xmit.recursion);
3278 #define XMIT_RECURSION_LIMIT 8
3279 static inline bool dev_xmit_recursion(void)
3281 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3282 XMIT_RECURSION_LIMIT);
3285 static inline void dev_xmit_recursion_inc(void)
3287 __this_cpu_inc(softnet_data.xmit.recursion);
3290 static inline void dev_xmit_recursion_dec(void)
3292 __this_cpu_dec(softnet_data.xmit.recursion);
3295 void __netif_schedule(struct Qdisc *q);
3296 void netif_schedule_queue(struct netdev_queue *txq);
3298 static inline void netif_tx_schedule_all(struct net_device *dev)
3302 for (i = 0; i < dev->num_tx_queues; i++)
3303 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3306 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3308 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3312 * netif_start_queue - allow transmit
3313 * @dev: network device
3315 * Allow upper layers to call the device hard_start_xmit routine.
3317 static inline void netif_start_queue(struct net_device *dev)
3319 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3322 static inline void netif_tx_start_all_queues(struct net_device *dev)
3326 for (i = 0; i < dev->num_tx_queues; i++) {
3327 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3328 netif_tx_start_queue(txq);
3332 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3335 * netif_wake_queue - restart transmit
3336 * @dev: network device
3338 * Allow upper layers to call the device hard_start_xmit routine.
3339 * Used for flow control when transmit resources are available.
3341 static inline void netif_wake_queue(struct net_device *dev)
3343 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3346 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3350 for (i = 0; i < dev->num_tx_queues; i++) {
3351 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3352 netif_tx_wake_queue(txq);
3356 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3358 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3362 * netif_stop_queue - stop transmitted packets
3363 * @dev: network device
3365 * Stop upper layers calling the device hard_start_xmit routine.
3366 * Used for flow control when transmit resources are unavailable.
3368 static inline void netif_stop_queue(struct net_device *dev)
3370 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3373 void netif_tx_stop_all_queues(struct net_device *dev);
3375 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3377 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3381 * netif_queue_stopped - test if transmit queue is flowblocked
3382 * @dev: network device
3384 * Test if transmit queue on device is currently unable to send.
3386 static inline bool netif_queue_stopped(const struct net_device *dev)
3388 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3391 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3393 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3397 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3399 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3403 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3405 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3409 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3410 * @dev_queue: pointer to transmit queue
3412 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3413 * to give appropriate hint to the CPU.
3415 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3418 prefetchw(&dev_queue->dql.num_queued);
3423 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3424 * @dev_queue: pointer to transmit queue
3426 * BQL enabled drivers might use this helper in their TX completion path,
3427 * to give appropriate hint to the CPU.
3429 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3432 prefetchw(&dev_queue->dql.limit);
3436 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3440 dql_queued(&dev_queue->dql, bytes);
3442 if (likely(dql_avail(&dev_queue->dql) >= 0))
3445 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3448 * The XOFF flag must be set before checking the dql_avail below,
3449 * because in netdev_tx_completed_queue we update the dql_completed
3450 * before checking the XOFF flag.
3454 /* check again in case another CPU has just made room avail */
3455 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3456 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3460 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3461 * that they should not test BQL status themselves.
3462 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3464 * Returns true if the doorbell must be used to kick the NIC.
3466 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3472 dql_queued(&dev_queue->dql, bytes);
3474 return netif_tx_queue_stopped(dev_queue);
3476 netdev_tx_sent_queue(dev_queue, bytes);
3481 * netdev_sent_queue - report the number of bytes queued to hardware
3482 * @dev: network device
3483 * @bytes: number of bytes queued to the hardware device queue
3485 * Report the number of bytes queued for sending/completion to the network
3486 * device hardware queue. @bytes should be a good approximation and should
3487 * exactly match netdev_completed_queue() @bytes
3489 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3491 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3494 static inline bool __netdev_sent_queue(struct net_device *dev,
3498 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3502 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3503 unsigned int pkts, unsigned int bytes)
3506 if (unlikely(!bytes))
3509 dql_completed(&dev_queue->dql, bytes);
3512 * Without the memory barrier there is a small possiblity that
3513 * netdev_tx_sent_queue will miss the update and cause the queue to
3514 * be stopped forever
3518 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3521 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3522 netif_schedule_queue(dev_queue);
3527 * netdev_completed_queue - report bytes and packets completed by device
3528 * @dev: network device
3529 * @pkts: actual number of packets sent over the medium
3530 * @bytes: actual number of bytes sent over the medium
3532 * Report the number of bytes and packets transmitted by the network device
3533 * hardware queue over the physical medium, @bytes must exactly match the
3534 * @bytes amount passed to netdev_sent_queue()
3536 static inline void netdev_completed_queue(struct net_device *dev,
3537 unsigned int pkts, unsigned int bytes)
3539 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3542 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3545 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3551 * netdev_reset_queue - reset the packets and bytes count of a network device
3552 * @dev_queue: network device
3554 * Reset the bytes and packet count of a network device and clear the
3555 * software flow control OFF bit for this network device
3557 static inline void netdev_reset_queue(struct net_device *dev_queue)
3559 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3563 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3564 * @dev: network device
3565 * @queue_index: given tx queue index
3567 * Returns 0 if given tx queue index >= number of device tx queues,
3568 * otherwise returns the originally passed tx queue index.
3570 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3572 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3573 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3574 dev->name, queue_index,
3575 dev->real_num_tx_queues);
3583 * netif_running - test if up
3584 * @dev: network device
3586 * Test if the device has been brought up.
3588 static inline bool netif_running(const struct net_device *dev)
3590 return test_bit(__LINK_STATE_START, &dev->state);
3594 * Routines to manage the subqueues on a device. We only need start,
3595 * stop, and a check if it's stopped. All other device management is
3596 * done at the overall netdevice level.
3597 * Also test the device if we're multiqueue.
3601 * netif_start_subqueue - allow sending packets on subqueue
3602 * @dev: network device
3603 * @queue_index: sub queue index
3605 * Start individual transmit queue of a device with multiple transmit queues.
3607 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3609 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3611 netif_tx_start_queue(txq);
3615 * netif_stop_subqueue - stop sending packets on subqueue
3616 * @dev: network device
3617 * @queue_index: sub queue index
3619 * Stop individual transmit queue of a device with multiple transmit queues.
3621 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3623 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3624 netif_tx_stop_queue(txq);
3628 * __netif_subqueue_stopped - test status of subqueue
3629 * @dev: network device
3630 * @queue_index: sub queue index
3632 * Check individual transmit queue of a device with multiple transmit queues.
3634 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3637 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3639 return netif_tx_queue_stopped(txq);
3643 * netif_subqueue_stopped - test status of subqueue
3644 * @dev: network device
3645 * @skb: sub queue buffer pointer
3647 * Check individual transmit queue of a device with multiple transmit queues.
3649 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3650 struct sk_buff *skb)
3652 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3656 * netif_wake_subqueue - allow sending packets on subqueue
3657 * @dev: network device
3658 * @queue_index: sub queue index
3660 * Resume individual transmit queue of a device with multiple transmit queues.
3662 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3664 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3666 netif_tx_wake_queue(txq);
3670 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3672 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3673 u16 index, bool is_rxqs_map);
3676 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3677 * @j: CPU/Rx queue index
3678 * @mask: bitmask of all cpus/rx queues
3679 * @nr_bits: number of bits in the bitmask
3681 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3683 static inline bool netif_attr_test_mask(unsigned long j,
3684 const unsigned long *mask,
3685 unsigned int nr_bits)
3687 cpu_max_bits_warn(j, nr_bits);
3688 return test_bit(j, mask);
3692 * netif_attr_test_online - Test for online CPU/Rx queue
3693 * @j: CPU/Rx queue index
3694 * @online_mask: bitmask for CPUs/Rx queues that are online
3695 * @nr_bits: number of bits in the bitmask
3697 * Returns true if a CPU/Rx queue is online.
3699 static inline bool netif_attr_test_online(unsigned long j,
3700 const unsigned long *online_mask,
3701 unsigned int nr_bits)
3703 cpu_max_bits_warn(j, nr_bits);
3706 return test_bit(j, online_mask);
3708 return (j < nr_bits);
3712 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3713 * @n: CPU/Rx queue index
3714 * @srcp: the cpumask/Rx queue mask pointer
3715 * @nr_bits: number of bits in the bitmask
3717 * Returns >= nr_bits if no further CPUs/Rx queues set.
3719 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3720 unsigned int nr_bits)
3722 /* -1 is a legal arg here. */
3724 cpu_max_bits_warn(n, nr_bits);
3727 return find_next_bit(srcp, nr_bits, n + 1);
3733 * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p
3734 * @n: CPU/Rx queue index
3735 * @src1p: the first CPUs/Rx queues mask pointer
3736 * @src2p: the second CPUs/Rx queues mask pointer
3737 * @nr_bits: number of bits in the bitmask
3739 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3741 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3742 const unsigned long *src2p,
3743 unsigned int nr_bits)
3745 /* -1 is a legal arg here. */
3747 cpu_max_bits_warn(n, nr_bits);
3750 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3752 return find_next_bit(src1p, nr_bits, n + 1);
3754 return find_next_bit(src2p, nr_bits, n + 1);
3759 static inline int netif_set_xps_queue(struct net_device *dev,
3760 const struct cpumask *mask,
3766 static inline int __netif_set_xps_queue(struct net_device *dev,
3767 const unsigned long *mask,
3768 u16 index, bool is_rxqs_map)
3775 * netif_is_multiqueue - test if device has multiple transmit queues
3776 * @dev: network device
3778 * Check if device has multiple transmit queues
3780 static inline bool netif_is_multiqueue(const struct net_device *dev)
3782 return dev->num_tx_queues > 1;
3785 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3788 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3790 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3793 dev->real_num_rx_queues = rxqs;
3798 static inline struct netdev_rx_queue *
3799 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3801 return dev->_rx + rxq;
3805 static inline unsigned int get_netdev_rx_queue_index(
3806 struct netdev_rx_queue *queue)
3808 struct net_device *dev = queue->dev;
3809 int index = queue - dev->_rx;
3811 BUG_ON(index >= dev->num_rx_queues);
3816 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3817 int netif_get_num_default_rss_queues(void);
3819 enum skb_free_reason {
3820 SKB_REASON_CONSUMED,
3824 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3825 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3828 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3829 * interrupt context or with hardware interrupts being disabled.
3830 * (in_irq() || irqs_disabled())
3832 * We provide four helpers that can be used in following contexts :
3834 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3835 * replacing kfree_skb(skb)
3837 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3838 * Typically used in place of consume_skb(skb) in TX completion path
3840 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3841 * replacing kfree_skb(skb)
3843 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3844 * and consumed a packet. Used in place of consume_skb(skb)
3846 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3848 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3851 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3853 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3856 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3858 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3861 static inline void dev_consume_skb_any(struct sk_buff *skb)
3863 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3866 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3867 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3868 int netif_rx(struct sk_buff *skb);
3869 int netif_rx_ni(struct sk_buff *skb);
3870 int netif_rx_any_context(struct sk_buff *skb);
3871 int netif_receive_skb(struct sk_buff *skb);
3872 int netif_receive_skb_core(struct sk_buff *skb);
3873 void netif_receive_skb_list(struct list_head *head);
3874 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3875 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3876 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3877 gro_result_t napi_gro_frags(struct napi_struct *napi);
3878 struct packet_offload *gro_find_receive_by_type(__be16 type);
3879 struct packet_offload *gro_find_complete_by_type(__be16 type);
3881 static inline void napi_free_frags(struct napi_struct *napi)
3883 kfree_skb(napi->skb);
3887 bool netdev_is_rx_handler_busy(struct net_device *dev);
3888 int netdev_rx_handler_register(struct net_device *dev,
3889 rx_handler_func_t *rx_handler,
3890 void *rx_handler_data);
3891 void netdev_rx_handler_unregister(struct net_device *dev);
3893 bool dev_valid_name(const char *name);
3894 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3895 bool *need_copyout);
3896 int dev_ifconf(struct net *net, struct ifconf *, int);
3897 int dev_ethtool(struct net *net, struct ifreq *);
3898 unsigned int dev_get_flags(const struct net_device *);
3899 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3900 struct netlink_ext_ack *extack);
3901 int dev_change_flags(struct net_device *dev, unsigned int flags,
3902 struct netlink_ext_ack *extack);
3903 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3904 unsigned int gchanges);
3905 int dev_change_name(struct net_device *, const char *);
3906 int dev_set_alias(struct net_device *, const char *, size_t);
3907 int dev_get_alias(const struct net_device *, char *, size_t);
3908 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3909 int __dev_set_mtu(struct net_device *, int);
3910 int dev_validate_mtu(struct net_device *dev, int mtu,
3911 struct netlink_ext_ack *extack);
3912 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3913 struct netlink_ext_ack *extack);
3914 int dev_set_mtu(struct net_device *, int);
3915 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3916 void dev_set_group(struct net_device *, int);
3917 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3918 struct netlink_ext_ack *extack);
3919 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3920 struct netlink_ext_ack *extack);
3921 int dev_change_carrier(struct net_device *, bool new_carrier);
3922 int dev_get_phys_port_id(struct net_device *dev,
3923 struct netdev_phys_item_id *ppid);
3924 int dev_get_phys_port_name(struct net_device *dev,
3925 char *name, size_t len);
3926 int dev_get_port_parent_id(struct net_device *dev,
3927 struct netdev_phys_item_id *ppid, bool recurse);
3928 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3929 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3930 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3931 void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
3933 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3934 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3935 struct netdev_queue *txq, int *ret);
3937 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3938 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3939 int fd, int expected_fd, u32 flags);
3940 int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
3941 u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode);
3943 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3945 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3946 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3947 bool is_skb_forwardable(const struct net_device *dev,
3948 const struct sk_buff *skb);
3950 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3951 struct sk_buff *skb)
3953 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3954 unlikely(!is_skb_forwardable(dev, skb))) {
3955 atomic_long_inc(&dev->rx_dropped);
3960 skb_scrub_packet(skb, true);
3965 bool dev_nit_active(struct net_device *dev);
3966 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3968 extern int netdev_budget;
3969 extern unsigned int netdev_budget_usecs;
3971 /* Called by rtnetlink.c:rtnl_unlock() */
3972 void netdev_run_todo(void);
3975 * dev_put - release reference to device
3976 * @dev: network device
3978 * Release reference to device to allow it to be freed.
3980 static inline void dev_put(struct net_device *dev)
3982 this_cpu_dec(*dev->pcpu_refcnt);
3986 * dev_hold - get reference to device
3987 * @dev: network device
3989 * Hold reference to device to keep it from being freed.
3991 static inline void dev_hold(struct net_device *dev)
3993 this_cpu_inc(*dev->pcpu_refcnt);
3996 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3997 * and _off may be called from IRQ context, but it is caller
3998 * who is responsible for serialization of these calls.
4000 * The name carrier is inappropriate, these functions should really be
4001 * called netif_lowerlayer_*() because they represent the state of any
4002 * kind of lower layer not just hardware media.
4005 void linkwatch_init_dev(struct net_device *dev);
4006 void linkwatch_fire_event(struct net_device *dev);
4007 void linkwatch_forget_dev(struct net_device *dev);
4010 * netif_carrier_ok - test if carrier present
4011 * @dev: network device
4013 * Check if carrier is present on device
4015 static inline bool netif_carrier_ok(const struct net_device *dev)
4017 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
4020 unsigned long dev_trans_start(struct net_device *dev);
4022 void __netdev_watchdog_up(struct net_device *dev);
4024 void netif_carrier_on(struct net_device *dev);
4026 void netif_carrier_off(struct net_device *dev);
4029 * netif_dormant_on - mark device as dormant.
4030 * @dev: network device
4032 * Mark device as dormant (as per RFC2863).
4034 * The dormant state indicates that the relevant interface is not
4035 * actually in a condition to pass packets (i.e., it is not 'up') but is
4036 * in a "pending" state, waiting for some external event. For "on-
4037 * demand" interfaces, this new state identifies the situation where the
4038 * interface is waiting for events to place it in the up state.
4040 static inline void netif_dormant_on(struct net_device *dev)
4042 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
4043 linkwatch_fire_event(dev);
4047 * netif_dormant_off - set device as not dormant.
4048 * @dev: network device
4050 * Device is not in dormant state.
4052 static inline void netif_dormant_off(struct net_device *dev)
4054 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
4055 linkwatch_fire_event(dev);
4059 * netif_dormant - test if device is dormant
4060 * @dev: network device
4062 * Check if device is dormant.
4064 static inline bool netif_dormant(const struct net_device *dev)
4066 return test_bit(__LINK_STATE_DORMANT, &dev->state);
4071 * netif_testing_on - mark device as under test.
4072 * @dev: network device
4074 * Mark device as under test (as per RFC2863).
4076 * The testing state indicates that some test(s) must be performed on
4077 * the interface. After completion, of the test, the interface state
4078 * will change to up, dormant, or down, as appropriate.
4080 static inline void netif_testing_on(struct net_device *dev)
4082 if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state))
4083 linkwatch_fire_event(dev);
4087 * netif_testing_off - set device as not under test.
4088 * @dev: network device
4090 * Device is not in testing state.
4092 static inline void netif_testing_off(struct net_device *dev)
4094 if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state))
4095 linkwatch_fire_event(dev);
4099 * netif_testing - test if device is under test
4100 * @dev: network device
4102 * Check if device is under test
4104 static inline bool netif_testing(const struct net_device *dev)
4106 return test_bit(__LINK_STATE_TESTING, &dev->state);
4111 * netif_oper_up - test if device is operational
4112 * @dev: network device
4114 * Check if carrier is operational
4116 static inline bool netif_oper_up(const struct net_device *dev)
4118 return (dev->operstate == IF_OPER_UP ||
4119 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
4123 * netif_device_present - is device available or removed
4124 * @dev: network device
4126 * Check if device has not been removed from system.
4128 static inline bool netif_device_present(struct net_device *dev)
4130 return test_bit(__LINK_STATE_PRESENT, &dev->state);
4133 void netif_device_detach(struct net_device *dev);
4135 void netif_device_attach(struct net_device *dev);
4138 * Network interface message level settings
4143 NETIF_MSG_PROBE_BIT,
4145 NETIF_MSG_TIMER_BIT,
4146 NETIF_MSG_IFDOWN_BIT,
4148 NETIF_MSG_RX_ERR_BIT,
4149 NETIF_MSG_TX_ERR_BIT,
4150 NETIF_MSG_TX_QUEUED_BIT,
4152 NETIF_MSG_TX_DONE_BIT,
4153 NETIF_MSG_RX_STATUS_BIT,
4154 NETIF_MSG_PKTDATA_BIT,
4158 /* When you add a new bit above, update netif_msg_class_names array
4159 * in net/ethtool/common.c
4161 NETIF_MSG_CLASS_COUNT,
4163 /* Both ethtool_ops interface and internal driver implementation use u32 */
4164 static_assert(NETIF_MSG_CLASS_COUNT <= 32);
4166 #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))
4167 #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)
4169 #define NETIF_MSG_DRV __NETIF_MSG(DRV)
4170 #define NETIF_MSG_PROBE __NETIF_MSG(PROBE)
4171 #define NETIF_MSG_LINK __NETIF_MSG(LINK)
4172 #define NETIF_MSG_TIMER __NETIF_MSG(TIMER)
4173 #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)
4174 #define NETIF_MSG_IFUP __NETIF_MSG(IFUP)
4175 #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)
4176 #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)
4177 #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)
4178 #define NETIF_MSG_INTR __NETIF_MSG(INTR)
4179 #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)
4180 #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)
4181 #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)
4182 #define NETIF_MSG_HW __NETIF_MSG(HW)
4183 #define NETIF_MSG_WOL __NETIF_MSG(WOL)
4185 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
4186 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
4187 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
4188 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
4189 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
4190 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
4191 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
4192 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
4193 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
4194 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
4195 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
4196 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
4197 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
4198 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
4199 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
4201 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
4204 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
4205 return default_msg_enable_bits;
4206 if (debug_value == 0) /* no output */
4208 /* set low N bits */
4209 return (1U << debug_value) - 1;
4212 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
4214 spin_lock(&txq->_xmit_lock);
4215 txq->xmit_lock_owner = cpu;
4218 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
4220 __acquire(&txq->_xmit_lock);
4224 static inline void __netif_tx_release(struct netdev_queue *txq)
4226 __release(&txq->_xmit_lock);
4229 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
4231 spin_lock_bh(&txq->_xmit_lock);
4232 txq->xmit_lock_owner = smp_processor_id();
4235 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
4237 bool ok = spin_trylock(&txq->_xmit_lock);
4239 txq->xmit_lock_owner = smp_processor_id();
4243 static inline void __netif_tx_unlock(struct netdev_queue *txq)
4245 txq->xmit_lock_owner = -1;
4246 spin_unlock(&txq->_xmit_lock);
4249 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
4251 txq->xmit_lock_owner = -1;
4252 spin_unlock_bh(&txq->_xmit_lock);
4255 static inline void txq_trans_update(struct netdev_queue *txq)
4257 if (txq->xmit_lock_owner != -1)
4258 txq->trans_start = jiffies;
4261 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
4262 static inline void netif_trans_update(struct net_device *dev)
4264 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
4266 if (txq->trans_start != jiffies)
4267 txq->trans_start = jiffies;
4271 * netif_tx_lock - grab network device transmit lock
4272 * @dev: network device
4274 * Get network device transmit lock
4276 static inline void netif_tx_lock(struct net_device *dev)
4281 spin_lock(&dev->tx_global_lock);
4282 cpu = smp_processor_id();
4283 for (i = 0; i < dev->num_tx_queues; i++) {
4284 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4286 /* We are the only thread of execution doing a
4287 * freeze, but we have to grab the _xmit_lock in
4288 * order to synchronize with threads which are in
4289 * the ->hard_start_xmit() handler and already
4290 * checked the frozen bit.
4292 __netif_tx_lock(txq, cpu);
4293 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
4294 __netif_tx_unlock(txq);
4298 static inline void netif_tx_lock_bh(struct net_device *dev)
4304 static inline void netif_tx_unlock(struct net_device *dev)
4308 for (i = 0; i < dev->num_tx_queues; i++) {
4309 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4311 /* No need to grab the _xmit_lock here. If the
4312 * queue is not stopped for another reason, we
4315 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4316 netif_schedule_queue(txq);
4318 spin_unlock(&dev->tx_global_lock);
4321 static inline void netif_tx_unlock_bh(struct net_device *dev)
4323 netif_tx_unlock(dev);
4327 #define HARD_TX_LOCK(dev, txq, cpu) { \
4328 if ((dev->features & NETIF_F_LLTX) == 0) { \
4329 __netif_tx_lock(txq, cpu); \
4331 __netif_tx_acquire(txq); \
4335 #define HARD_TX_TRYLOCK(dev, txq) \
4336 (((dev->features & NETIF_F_LLTX) == 0) ? \
4337 __netif_tx_trylock(txq) : \
4338 __netif_tx_acquire(txq))
4340 #define HARD_TX_UNLOCK(dev, txq) { \
4341 if ((dev->features & NETIF_F_LLTX) == 0) { \
4342 __netif_tx_unlock(txq); \
4344 __netif_tx_release(txq); \
4348 static inline void netif_tx_disable(struct net_device *dev)
4354 cpu = smp_processor_id();
4355 for (i = 0; i < dev->num_tx_queues; i++) {
4356 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4358 __netif_tx_lock(txq, cpu);
4359 netif_tx_stop_queue(txq);
4360 __netif_tx_unlock(txq);
4365 static inline void netif_addr_lock(struct net_device *dev)
4367 unsigned char nest_level = 0;
4369 #ifdef CONFIG_LOCKDEP
4370 nest_level = dev->nested_level;
4372 spin_lock_nested(&dev->addr_list_lock, nest_level);
4375 static inline void netif_addr_lock_bh(struct net_device *dev)
4377 unsigned char nest_level = 0;
4379 #ifdef CONFIG_LOCKDEP
4380 nest_level = dev->nested_level;
4383 spin_lock_nested(&dev->addr_list_lock, nest_level);
4386 static inline void netif_addr_unlock(struct net_device *dev)
4388 spin_unlock(&dev->addr_list_lock);
4391 static inline void netif_addr_unlock_bh(struct net_device *dev)
4393 spin_unlock_bh(&dev->addr_list_lock);
4397 * dev_addrs walker. Should be used only for read access. Call with
4398 * rcu_read_lock held.
4400 #define for_each_dev_addr(dev, ha) \
4401 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4403 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4405 void ether_setup(struct net_device *dev);
4407 /* Support for loadable net-drivers */
4408 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4409 unsigned char name_assign_type,
4410 void (*setup)(struct net_device *),
4411 unsigned int txqs, unsigned int rxqs);
4412 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4413 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4415 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4416 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4419 int register_netdev(struct net_device *dev);
4420 void unregister_netdev(struct net_device *dev);
4422 int devm_register_netdev(struct device *dev, struct net_device *ndev);
4424 /* General hardware address lists handling functions */
4425 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4426 struct netdev_hw_addr_list *from_list, int addr_len);
4427 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4428 struct netdev_hw_addr_list *from_list, int addr_len);
4429 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4430 struct net_device *dev,
4431 int (*sync)(struct net_device *, const unsigned char *),
4432 int (*unsync)(struct net_device *,
4433 const unsigned char *));
4434 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4435 struct net_device *dev,
4436 int (*sync)(struct net_device *,
4437 const unsigned char *, int),
4438 int (*unsync)(struct net_device *,
4439 const unsigned char *, int));
4440 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4441 struct net_device *dev,
4442 int (*unsync)(struct net_device *,
4443 const unsigned char *, int));
4444 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4445 struct net_device *dev,
4446 int (*unsync)(struct net_device *,
4447 const unsigned char *));
4448 void __hw_addr_init(struct netdev_hw_addr_list *list);
4450 /* Functions used for device addresses handling */
4451 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4452 unsigned char addr_type);
4453 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4454 unsigned char addr_type);
4455 void dev_addr_flush(struct net_device *dev);
4456 int dev_addr_init(struct net_device *dev);
4458 /* Functions used for unicast addresses handling */
4459 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4460 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4461 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4462 int dev_uc_sync(struct net_device *to, struct net_device *from);
4463 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4464 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4465 void dev_uc_flush(struct net_device *dev);
4466 void dev_uc_init(struct net_device *dev);
4469 * __dev_uc_sync - Synchonize device's unicast list
4470 * @dev: device to sync
4471 * @sync: function to call if address should be added
4472 * @unsync: function to call if address should be removed
4474 * Add newly added addresses to the interface, and release
4475 * addresses that have been deleted.
4477 static inline int __dev_uc_sync(struct net_device *dev,
4478 int (*sync)(struct net_device *,
4479 const unsigned char *),
4480 int (*unsync)(struct net_device *,
4481 const unsigned char *))
4483 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4487 * __dev_uc_unsync - Remove synchronized addresses from device
4488 * @dev: device to sync
4489 * @unsync: function to call if address should be removed
4491 * Remove all addresses that were added to the device by dev_uc_sync().
4493 static inline void __dev_uc_unsync(struct net_device *dev,
4494 int (*unsync)(struct net_device *,
4495 const unsigned char *))
4497 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4500 /* Functions used for multicast addresses handling */
4501 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4502 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4503 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4504 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4505 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4506 int dev_mc_sync(struct net_device *to, struct net_device *from);
4507 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4508 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4509 void dev_mc_flush(struct net_device *dev);
4510 void dev_mc_init(struct net_device *dev);
4513 * __dev_mc_sync - Synchonize device's multicast list
4514 * @dev: device to sync
4515 * @sync: function to call if address should be added
4516 * @unsync: function to call if address should be removed
4518 * Add newly added addresses to the interface, and release
4519 * addresses that have been deleted.
4521 static inline int __dev_mc_sync(struct net_device *dev,
4522 int (*sync)(struct net_device *,
4523 const unsigned char *),
4524 int (*unsync)(struct net_device *,
4525 const unsigned char *))
4527 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4531 * __dev_mc_unsync - Remove synchronized addresses from device
4532 * @dev: device to sync
4533 * @unsync: function to call if address should be removed
4535 * Remove all addresses that were added to the device by dev_mc_sync().
4537 static inline void __dev_mc_unsync(struct net_device *dev,
4538 int (*unsync)(struct net_device *,
4539 const unsigned char *))
4541 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4544 /* Functions used for secondary unicast and multicast support */
4545 void dev_set_rx_mode(struct net_device *dev);
4546 void __dev_set_rx_mode(struct net_device *dev);
4547 int dev_set_promiscuity(struct net_device *dev, int inc);
4548 int dev_set_allmulti(struct net_device *dev, int inc);
4549 void netdev_state_change(struct net_device *dev);
4550 void netdev_notify_peers(struct net_device *dev);
4551 void netdev_features_change(struct net_device *dev);
4552 /* Load a device via the kmod */
4553 void dev_load(struct net *net, const char *name);
4554 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4555 struct rtnl_link_stats64 *storage);
4556 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4557 const struct net_device_stats *netdev_stats);
4558 void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,
4559 const struct pcpu_sw_netstats __percpu *netstats);
4560 void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s);
4562 extern int netdev_max_backlog;
4563 extern int netdev_tstamp_prequeue;
4564 extern int weight_p;
4565 extern int dev_weight_rx_bias;
4566 extern int dev_weight_tx_bias;
4567 extern int dev_rx_weight;
4568 extern int dev_tx_weight;
4569 extern int gro_normal_batch;
4572 NESTED_SYNC_IMM_BIT,
4573 NESTED_SYNC_TODO_BIT,
4576 #define __NESTED_SYNC_BIT(bit) ((u32)1 << (bit))
4577 #define __NESTED_SYNC(name) __NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT)
4579 #define NESTED_SYNC_IMM __NESTED_SYNC(IMM)
4580 #define NESTED_SYNC_TODO __NESTED_SYNC(TODO)
4582 struct netdev_nested_priv {
4583 unsigned char flags;
4587 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4588 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4589 struct list_head **iter);
4590 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4591 struct list_head **iter);
4593 #ifdef CONFIG_LOCKDEP
4594 static LIST_HEAD(net_unlink_list);
4596 static inline void net_unlink_todo(struct net_device *dev)
4598 if (list_empty(&dev->unlink_list))
4599 list_add_tail(&dev->unlink_list, &net_unlink_list);
4603 /* iterate through upper list, must be called under RCU read lock */
4604 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4605 for (iter = &(dev)->adj_list.upper, \
4606 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4608 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4610 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4611 int (*fn)(struct net_device *upper_dev,
4612 struct netdev_nested_priv *priv),
4613 struct netdev_nested_priv *priv);
4615 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4616 struct net_device *upper_dev);
4618 bool netdev_has_any_upper_dev(struct net_device *dev);
4620 void *netdev_lower_get_next_private(struct net_device *dev,
4621 struct list_head **iter);
4622 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4623 struct list_head **iter);
4625 #define netdev_for_each_lower_private(dev, priv, iter) \
4626 for (iter = (dev)->adj_list.lower.next, \
4627 priv = netdev_lower_get_next_private(dev, &(iter)); \
4629 priv = netdev_lower_get_next_private(dev, &(iter)))
4631 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4632 for (iter = &(dev)->adj_list.lower, \
4633 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4635 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4637 void *netdev_lower_get_next(struct net_device *dev,
4638 struct list_head **iter);
4640 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4641 for (iter = (dev)->adj_list.lower.next, \
4642 ldev = netdev_lower_get_next(dev, &(iter)); \
4644 ldev = netdev_lower_get_next(dev, &(iter)))
4646 struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
4647 struct list_head **iter);
4648 int netdev_walk_all_lower_dev(struct net_device *dev,
4649 int (*fn)(struct net_device *lower_dev,
4650 struct netdev_nested_priv *priv),
4651 struct netdev_nested_priv *priv);
4652 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4653 int (*fn)(struct net_device *lower_dev,
4654 struct netdev_nested_priv *priv),
4655 struct netdev_nested_priv *priv);
4657 void *netdev_adjacent_get_private(struct list_head *adj_list);
4658 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4659 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4660 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4661 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4662 struct netlink_ext_ack *extack);
4663 int netdev_master_upper_dev_link(struct net_device *dev,
4664 struct net_device *upper_dev,
4665 void *upper_priv, void *upper_info,
4666 struct netlink_ext_ack *extack);
4667 void netdev_upper_dev_unlink(struct net_device *dev,
4668 struct net_device *upper_dev);
4669 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4670 struct net_device *new_dev,
4671 struct net_device *dev,
4672 struct netlink_ext_ack *extack);
4673 void netdev_adjacent_change_commit(struct net_device *old_dev,
4674 struct net_device *new_dev,
4675 struct net_device *dev);
4676 void netdev_adjacent_change_abort(struct net_device *old_dev,
4677 struct net_device *new_dev,
4678 struct net_device *dev);
4679 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4680 void *netdev_lower_dev_get_private(struct net_device *dev,
4681 struct net_device *lower_dev);
4682 void netdev_lower_state_changed(struct net_device *lower_dev,
4683 void *lower_state_info);
4685 /* RSS keys are 40 or 52 bytes long */
4686 #define NETDEV_RSS_KEY_LEN 52
4687 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4688 void netdev_rss_key_fill(void *buffer, size_t len);
4690 int skb_checksum_help(struct sk_buff *skb);
4691 int skb_crc32c_csum_help(struct sk_buff *skb);
4692 int skb_csum_hwoffload_help(struct sk_buff *skb,
4693 const netdev_features_t features);
4695 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4696 netdev_features_t features, bool tx_path);
4697 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4698 netdev_features_t features);
4700 struct netdev_bonding_info {
4705 struct netdev_notifier_bonding_info {
4706 struct netdev_notifier_info info; /* must be first */
4707 struct netdev_bonding_info bonding_info;
4710 void netdev_bonding_info_change(struct net_device *dev,
4711 struct netdev_bonding_info *bonding_info);
4713 #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
4714 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
4716 static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
4723 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4725 return __skb_gso_segment(skb, features, true);
4727 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4729 static inline bool can_checksum_protocol(netdev_features_t features,
4732 if (protocol == htons(ETH_P_FCOE))
4733 return !!(features & NETIF_F_FCOE_CRC);
4735 /* Assume this is an IP checksum (not SCTP CRC) */
4737 if (features & NETIF_F_HW_CSUM) {
4738 /* Can checksum everything */
4743 case htons(ETH_P_IP):
4744 return !!(features & NETIF_F_IP_CSUM);
4745 case htons(ETH_P_IPV6):
4746 return !!(features & NETIF_F_IPV6_CSUM);
4753 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4755 static inline void netdev_rx_csum_fault(struct net_device *dev,
4756 struct sk_buff *skb)
4760 /* rx skb timestamps */
4761 void net_enable_timestamp(void);
4762 void net_disable_timestamp(void);
4764 #ifdef CONFIG_PROC_FS
4765 int __init dev_proc_init(void);
4767 #define dev_proc_init() 0
4770 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4771 struct sk_buff *skb, struct net_device *dev,
4774 __this_cpu_write(softnet_data.xmit.more, more);
4775 return ops->ndo_start_xmit(skb, dev);
4778 static inline bool netdev_xmit_more(void)
4780 return __this_cpu_read(softnet_data.xmit.more);
4783 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4784 struct netdev_queue *txq, bool more)
4786 const struct net_device_ops *ops = dev->netdev_ops;
4789 rc = __netdev_start_xmit(ops, skb, dev, more);
4790 if (rc == NETDEV_TX_OK)
4791 txq_trans_update(txq);
4796 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4798 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4801 extern const struct kobj_ns_type_operations net_ns_type_operations;
4803 const char *netdev_drivername(const struct net_device *dev);
4805 void linkwatch_run_queue(void);
4807 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4808 netdev_features_t f2)
4810 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4811 if (f1 & NETIF_F_HW_CSUM)
4812 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4814 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4820 static inline netdev_features_t netdev_get_wanted_features(
4821 struct net_device *dev)
4823 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4825 netdev_features_t netdev_increment_features(netdev_features_t all,
4826 netdev_features_t one, netdev_features_t mask);
4828 /* Allow TSO being used on stacked device :
4829 * Performing the GSO segmentation before last device
4830 * is a performance improvement.
4832 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4833 netdev_features_t mask)
4835 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4838 int __netdev_update_features(struct net_device *dev);
4839 void netdev_update_features(struct net_device *dev);
4840 void netdev_change_features(struct net_device *dev);
4842 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4843 struct net_device *dev);
4845 netdev_features_t passthru_features_check(struct sk_buff *skb,
4846 struct net_device *dev,
4847 netdev_features_t features);
4848 netdev_features_t netif_skb_features(struct sk_buff *skb);
4850 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4852 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4854 /* check flags correspondence */
4855 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4856 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4857 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4858 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4859 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4860 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4861 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4862 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4863 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4864 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4865 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4866 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4867 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4868 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4869 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4870 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4871 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4872 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4873 BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));
4875 return (features & feature) == feature;
4878 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4880 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4881 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4884 static inline bool netif_needs_gso(struct sk_buff *skb,
4885 netdev_features_t features)
4887 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4888 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4889 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4892 static inline void netif_set_gso_max_size(struct net_device *dev,
4895 dev->gso_max_size = size;
4898 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4899 int pulled_hlen, u16 mac_offset,
4902 skb->protocol = protocol;
4903 skb->encapsulation = 1;
4904 skb_push(skb, pulled_hlen);
4905 skb_reset_transport_header(skb);
4906 skb->mac_header = mac_offset;
4907 skb->network_header = skb->mac_header + mac_len;
4908 skb->mac_len = mac_len;
4911 static inline bool netif_is_macsec(const struct net_device *dev)
4913 return dev->priv_flags & IFF_MACSEC;
4916 static inline bool netif_is_macvlan(const struct net_device *dev)
4918 return dev->priv_flags & IFF_MACVLAN;
4921 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4923 return dev->priv_flags & IFF_MACVLAN_PORT;
4926 static inline bool netif_is_bond_master(const struct net_device *dev)
4928 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4931 static inline bool netif_is_bond_slave(const struct net_device *dev)
4933 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4936 static inline bool netif_supports_nofcs(struct net_device *dev)
4938 return dev->priv_flags & IFF_SUPP_NOFCS;
4941 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4943 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4946 static inline bool netif_is_l3_master(const struct net_device *dev)
4948 return dev->priv_flags & IFF_L3MDEV_MASTER;
4951 static inline bool netif_is_l3_slave(const struct net_device *dev)
4953 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4956 static inline bool netif_is_bridge_master(const struct net_device *dev)
4958 return dev->priv_flags & IFF_EBRIDGE;
4961 static inline bool netif_is_bridge_port(const struct net_device *dev)
4963 return dev->priv_flags & IFF_BRIDGE_PORT;
4966 static inline bool netif_is_ovs_master(const struct net_device *dev)
4968 return dev->priv_flags & IFF_OPENVSWITCH;
4971 static inline bool netif_is_ovs_port(const struct net_device *dev)
4973 return dev->priv_flags & IFF_OVS_DATAPATH;
4976 static inline bool netif_is_any_bridge_port(const struct net_device *dev)
4978 return netif_is_bridge_port(dev) || netif_is_ovs_port(dev);
4981 static inline bool netif_is_team_master(const struct net_device *dev)
4983 return dev->priv_flags & IFF_TEAM;
4986 static inline bool netif_is_team_port(const struct net_device *dev)
4988 return dev->priv_flags & IFF_TEAM_PORT;
4991 static inline bool netif_is_lag_master(const struct net_device *dev)
4993 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4996 static inline bool netif_is_lag_port(const struct net_device *dev)
4998 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
5001 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
5003 return dev->priv_flags & IFF_RXFH_CONFIGURED;
5006 static inline bool netif_is_failover(const struct net_device *dev)
5008 return dev->priv_flags & IFF_FAILOVER;
5011 static inline bool netif_is_failover_slave(const struct net_device *dev)
5013 return dev->priv_flags & IFF_FAILOVER_SLAVE;
5016 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
5017 static inline void netif_keep_dst(struct net_device *dev)
5019 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
5022 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
5023 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
5025 /* TODO: reserve and use an additional IFF bit, if we get more users */
5026 return dev->priv_flags & IFF_MACSEC;
5029 extern struct pernet_operations __net_initdata loopback_net_ops;
5031 /* Logging, debugging and troubleshooting/diagnostic helpers. */
5033 /* netdev_printk helpers, similar to dev_printk */
5035 static inline const char *netdev_name(const struct net_device *dev)
5037 if (!dev->name[0] || strchr(dev->name, '%'))
5038 return "(unnamed net_device)";
5042 static inline bool netdev_unregistering(const struct net_device *dev)
5044 return dev->reg_state == NETREG_UNREGISTERING;
5047 static inline const char *netdev_reg_state(const struct net_device *dev)
5049 switch (dev->reg_state) {
5050 case NETREG_UNINITIALIZED: return " (uninitialized)";
5051 case NETREG_REGISTERED: return "";
5052 case NETREG_UNREGISTERING: return " (unregistering)";
5053 case NETREG_UNREGISTERED: return " (unregistered)";
5054 case NETREG_RELEASED: return " (released)";
5055 case NETREG_DUMMY: return " (dummy)";
5058 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
5059 return " (unknown)";
5062 __printf(3, 4) __cold
5063 void netdev_printk(const char *level, const struct net_device *dev,
5064 const char *format, ...);
5065 __printf(2, 3) __cold
5066 void netdev_emerg(const struct net_device *dev, const char *format, ...);
5067 __printf(2, 3) __cold
5068 void netdev_alert(const struct net_device *dev, const char *format, ...);
5069 __printf(2, 3) __cold
5070 void netdev_crit(const struct net_device *dev, const char *format, ...);
5071 __printf(2, 3) __cold
5072 void netdev_err(const struct net_device *dev, const char *format, ...);
5073 __printf(2, 3) __cold
5074 void netdev_warn(const struct net_device *dev, const char *format, ...);
5075 __printf(2, 3) __cold
5076 void netdev_notice(const struct net_device *dev, const char *format, ...);
5077 __printf(2, 3) __cold
5078 void netdev_info(const struct net_device *dev, const char *format, ...);
5080 #define netdev_level_once(level, dev, fmt, ...) \
5082 static bool __print_once __read_mostly; \
5084 if (!__print_once) { \
5085 __print_once = true; \
5086 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
5090 #define netdev_emerg_once(dev, fmt, ...) \
5091 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
5092 #define netdev_alert_once(dev, fmt, ...) \
5093 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
5094 #define netdev_crit_once(dev, fmt, ...) \
5095 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
5096 #define netdev_err_once(dev, fmt, ...) \
5097 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
5098 #define netdev_warn_once(dev, fmt, ...) \
5099 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
5100 #define netdev_notice_once(dev, fmt, ...) \
5101 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
5102 #define netdev_info_once(dev, fmt, ...) \
5103 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
5105 #define MODULE_ALIAS_NETDEV(device) \
5106 MODULE_ALIAS("netdev-" device)
5108 #if defined(CONFIG_DYNAMIC_DEBUG) || \
5109 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
5110 #define netdev_dbg(__dev, format, args...) \
5112 dynamic_netdev_dbg(__dev, format, ##args); \
5114 #elif defined(DEBUG)
5115 #define netdev_dbg(__dev, format, args...) \
5116 netdev_printk(KERN_DEBUG, __dev, format, ##args)
5118 #define netdev_dbg(__dev, format, args...) \
5121 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
5125 #if defined(VERBOSE_DEBUG)
5126 #define netdev_vdbg netdev_dbg
5129 #define netdev_vdbg(dev, format, args...) \
5132 netdev_printk(KERN_DEBUG, dev, format, ##args); \
5138 * netdev_WARN() acts like dev_printk(), but with the key difference
5139 * of using a WARN/WARN_ON to get the message out, including the
5140 * file/line information and a backtrace.
5142 #define netdev_WARN(dev, format, args...) \
5143 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
5144 netdev_reg_state(dev), ##args)
5146 #define netdev_WARN_ONCE(dev, format, args...) \
5147 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
5148 netdev_reg_state(dev), ##args)
5150 /* netif printk helpers, similar to netdev_printk */
5152 #define netif_printk(priv, type, level, dev, fmt, args...) \
5154 if (netif_msg_##type(priv)) \
5155 netdev_printk(level, (dev), fmt, ##args); \
5158 #define netif_level(level, priv, type, dev, fmt, args...) \
5160 if (netif_msg_##type(priv)) \
5161 netdev_##level(dev, fmt, ##args); \
5164 #define netif_emerg(priv, type, dev, fmt, args...) \
5165 netif_level(emerg, priv, type, dev, fmt, ##args)
5166 #define netif_alert(priv, type, dev, fmt, args...) \
5167 netif_level(alert, priv, type, dev, fmt, ##args)
5168 #define netif_crit(priv, type, dev, fmt, args...) \
5169 netif_level(crit, priv, type, dev, fmt, ##args)
5170 #define netif_err(priv, type, dev, fmt, args...) \
5171 netif_level(err, priv, type, dev, fmt, ##args)
5172 #define netif_warn(priv, type, dev, fmt, args...) \
5173 netif_level(warn, priv, type, dev, fmt, ##args)
5174 #define netif_notice(priv, type, dev, fmt, args...) \
5175 netif_level(notice, priv, type, dev, fmt, ##args)
5176 #define netif_info(priv, type, dev, fmt, args...) \
5177 netif_level(info, priv, type, dev, fmt, ##args)
5179 #if defined(CONFIG_DYNAMIC_DEBUG) || \
5180 (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
5181 #define netif_dbg(priv, type, netdev, format, args...) \
5183 if (netif_msg_##type(priv)) \
5184 dynamic_netdev_dbg(netdev, format, ##args); \
5186 #elif defined(DEBUG)
5187 #define netif_dbg(priv, type, dev, format, args...) \
5188 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
5190 #define netif_dbg(priv, type, dev, format, args...) \
5193 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5198 /* if @cond then downgrade to debug, else print at @level */
5199 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
5202 netif_dbg(priv, type, netdev, fmt, ##args); \
5204 netif_ ## level(priv, type, netdev, fmt, ##args); \
5207 #if defined(VERBOSE_DEBUG)
5208 #define netif_vdbg netif_dbg
5210 #define netif_vdbg(priv, type, dev, format, args...) \
5213 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5219 * The list of packet types we will receive (as opposed to discard)
5220 * and the routines to invoke.
5222 * Why 16. Because with 16 the only overlap we get on a hash of the
5223 * low nibble of the protocol value is RARP/SNAP/X.25.
5237 #define PTYPE_HASH_SIZE (16)
5238 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
5240 extern struct net_device *blackhole_netdev;
5242 #endif /* _LINUX_NETDEVICE_H */