1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Definitions for the Interfaces handler.
9 * Version: @(#)dev.h 1.0.10 08/12/93
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Corey Minyard <wf-rch!minyard@relay.EU.net>
14 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
15 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
16 * Bjorn Ekwall. <bj0rn@blox.se>
17 * Pekka Riikonen <priikone@poseidon.pspt.fi>
19 * Moved to /usr/include/linux for NET3
21 #ifndef _LINUX_NETDEVICE_H
22 #define _LINUX_NETDEVICE_H
24 #include <linux/timer.h>
25 #include <linux/bug.h>
26 #include <linux/delay.h>
27 #include <linux/atomic.h>
28 #include <linux/prefetch.h>
29 #include <asm/cache.h>
30 #include <asm/byteorder.h>
32 #include <linux/percpu.h>
33 #include <linux/rculist.h>
34 #include <linux/workqueue.h>
35 #include <linux/dynamic_queue_limits.h>
37 #include <linux/ethtool.h>
38 #include <net/net_namespace.h>
40 #include <net/dcbnl.h>
42 #include <net/netprio_cgroup.h>
45 #include <linux/netdev_features.h>
46 #include <linux/neighbour.h>
47 #include <uapi/linux/netdevice.h>
48 #include <uapi/linux/if_bonding.h>
49 #include <uapi/linux/pkt_cls.h>
50 #include <linux/hashtable.h>
60 /* 802.15.4 specific */
63 /* UDP Tunnel offloads */
64 struct udp_tunnel_info;
68 void netdev_set_default_ethtool_ops(struct net_device *dev,
69 const struct ethtool_ops *ops);
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
76 * Transmit return codes: transmit return codes originate from three different
79 * - qdisc return codes
80 * - driver transmit return codes
83 * Drivers are allowed to return any one of those in their hard_start_xmit()
84 * function. Real network devices commonly used with qdiscs should only return
85 * the driver transmit return codes though - when qdiscs are used, the actual
86 * transmission happens asynchronously, so the value is not propagated to
87 * higher layers. Virtual network devices transmit synchronously; in this case
88 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
89 * others are propagated to higher layers.
92 /* qdisc ->enqueue() return codes. */
93 #define NET_XMIT_SUCCESS 0x00
94 #define NET_XMIT_DROP 0x01 /* skb dropped */
95 #define NET_XMIT_CN 0x02 /* congestion notification */
96 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
98 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
99 * indicates that the device will soon be dropping packets, or already drops
100 * some packets of the same priority; prompting us to send less aggressively. */
101 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
102 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
104 /* Driver transmit return codes */
105 #define NETDEV_TX_MASK 0xf0
108 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
109 NETDEV_TX_OK = 0x00, /* driver took care of packet */
110 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
112 typedef enum netdev_tx netdev_tx_t;
115 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
116 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
118 static inline bool dev_xmit_complete(int rc)
121 * Positive cases with an skb consumed by a driver:
122 * - successful transmission (rc == NETDEV_TX_OK)
123 * - error while transmitting (rc < 0)
124 * - error while queueing to a different device (rc & NET_XMIT_MASK)
126 if (likely(rc < NET_XMIT_MASK))
133 * Compute the worst-case header length according to the protocols
137 #if defined(CONFIG_HYPERV_NET)
138 # define LL_MAX_HEADER 128
139 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
140 # if defined(CONFIG_MAC80211_MESH)
141 # define LL_MAX_HEADER 128
143 # define LL_MAX_HEADER 96
146 # define LL_MAX_HEADER 32
149 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
150 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
151 #define MAX_HEADER LL_MAX_HEADER
153 #define MAX_HEADER (LL_MAX_HEADER + 48)
157 * Old network device statistics. Fields are native words
158 * (unsigned long) so they can be read and written atomically.
161 struct net_device_stats {
162 unsigned long rx_packets;
163 unsigned long tx_packets;
164 unsigned long rx_bytes;
165 unsigned long tx_bytes;
166 unsigned long rx_errors;
167 unsigned long tx_errors;
168 unsigned long rx_dropped;
169 unsigned long tx_dropped;
170 unsigned long multicast;
171 unsigned long collisions;
172 unsigned long rx_length_errors;
173 unsigned long rx_over_errors;
174 unsigned long rx_crc_errors;
175 unsigned long rx_frame_errors;
176 unsigned long rx_fifo_errors;
177 unsigned long rx_missed_errors;
178 unsigned long tx_aborted_errors;
179 unsigned long tx_carrier_errors;
180 unsigned long tx_fifo_errors;
181 unsigned long tx_heartbeat_errors;
182 unsigned long tx_window_errors;
183 unsigned long rx_compressed;
184 unsigned long tx_compressed;
188 #include <linux/cache.h>
189 #include <linux/skbuff.h>
192 #include <linux/static_key.h>
193 extern struct static_key_false rps_needed;
194 extern struct static_key_false rfs_needed;
201 struct netdev_hw_addr {
202 struct list_head list;
203 unsigned char addr[MAX_ADDR_LEN];
205 #define NETDEV_HW_ADDR_T_LAN 1
206 #define NETDEV_HW_ADDR_T_SAN 2
207 #define NETDEV_HW_ADDR_T_SLAVE 3
208 #define NETDEV_HW_ADDR_T_UNICAST 4
209 #define NETDEV_HW_ADDR_T_MULTICAST 5
214 struct rcu_head rcu_head;
217 struct netdev_hw_addr_list {
218 struct list_head list;
222 #define netdev_hw_addr_list_count(l) ((l)->count)
223 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
224 #define netdev_hw_addr_list_for_each(ha, l) \
225 list_for_each_entry(ha, &(l)->list, list)
227 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
228 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
229 #define netdev_for_each_uc_addr(ha, dev) \
230 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
232 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
233 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
234 #define netdev_for_each_mc_addr(ha, dev) \
235 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
241 /* cached hardware header; allow for machine alignment needs. */
242 #define HH_DATA_MOD 16
243 #define HH_DATA_OFF(__len) \
244 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
245 #define HH_DATA_ALIGN(__len) \
246 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
247 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
250 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
252 * dev->hard_header_len ? (dev->hard_header_len +
253 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
255 * We could use other alignment values, but we must maintain the
256 * relationship HH alignment <= LL alignment.
258 #define LL_RESERVED_SPACE(dev) \
259 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
260 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 int (*create) (struct sk_buff *skb, struct net_device *dev,
265 unsigned short type, const void *daddr,
266 const void *saddr, unsigned int len);
267 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
268 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
269 void (*cache_update)(struct hh_cache *hh,
270 const struct net_device *dev,
271 const unsigned char *haddr);
272 bool (*validate)(const char *ll_header, unsigned int len);
273 __be16 (*parse_protocol)(const struct sk_buff *skb);
276 /* These flag bits are private to the generic network queueing
277 * layer; they may not be explicitly referenced by any other
281 enum netdev_state_t {
283 __LINK_STATE_PRESENT,
284 __LINK_STATE_NOCARRIER,
285 __LINK_STATE_LINKWATCH_PENDING,
286 __LINK_STATE_DORMANT,
291 * This structure holds boot-time configured netdevice settings. They
292 * are then used in the device probing.
294 struct netdev_boot_setup {
298 #define NETDEV_BOOT_SETUP_MAX 8
300 int __init netdev_boot_setup(char *str);
303 struct list_head list;
308 * size of gro hash buckets, must less than bit number of
309 * napi_struct::gro_bitmask
311 #define GRO_HASH_BUCKETS 8
314 * Structure for NAPI scheduling similar to tasklet but with weighting
317 /* The poll_list must only be managed by the entity which
318 * changes the state of the NAPI_STATE_SCHED bit. This means
319 * whoever atomically sets that bit can add this napi_struct
320 * to the per-CPU poll_list, and whoever clears that bit
321 * can remove from the list right before clearing the bit.
323 struct list_head poll_list;
327 unsigned long gro_bitmask;
328 int (*poll)(struct napi_struct *, int);
329 #ifdef CONFIG_NETPOLL
332 struct net_device *dev;
333 struct gro_list gro_hash[GRO_HASH_BUCKETS];
335 struct list_head rx_list; /* Pending GRO_NORMAL skbs */
336 int rx_count; /* length of rx_list */
337 struct hrtimer timer;
338 struct list_head dev_list;
339 struct hlist_node napi_hash_node;
340 unsigned int napi_id;
344 NAPI_STATE_SCHED, /* Poll is scheduled */
345 NAPI_STATE_MISSED, /* reschedule a napi */
346 NAPI_STATE_DISABLE, /* Disable pending */
347 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
348 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
349 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
350 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
354 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
355 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
356 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
357 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
358 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
359 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
360 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
371 typedef enum gro_result gro_result_t;
374 * enum rx_handler_result - Possible return values for rx_handlers.
375 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
377 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
378 * case skb->dev was changed by rx_handler.
379 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
380 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
382 * rx_handlers are functions called from inside __netif_receive_skb(), to do
383 * special processing of the skb, prior to delivery to protocol handlers.
385 * Currently, a net_device can only have a single rx_handler registered. Trying
386 * to register a second rx_handler will return -EBUSY.
388 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
389 * To unregister a rx_handler on a net_device, use
390 * netdev_rx_handler_unregister().
392 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
395 * If the rx_handler consumed the skb in some way, it should return
396 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
397 * the skb to be delivered in some other way.
399 * If the rx_handler changed skb->dev, to divert the skb to another
400 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
401 * new device will be called if it exists.
403 * If the rx_handler decides the skb should be ignored, it should return
404 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
405 * are registered on exact device (ptype->dev == skb->dev).
407 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
408 * delivered, it should return RX_HANDLER_PASS.
410 * A device without a registered rx_handler will behave as if rx_handler
411 * returned RX_HANDLER_PASS.
414 enum rx_handler_result {
420 typedef enum rx_handler_result rx_handler_result_t;
421 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
423 void __napi_schedule(struct napi_struct *n);
424 void __napi_schedule_irqoff(struct napi_struct *n);
426 static inline bool napi_disable_pending(struct napi_struct *n)
428 return test_bit(NAPI_STATE_DISABLE, &n->state);
431 bool napi_schedule_prep(struct napi_struct *n);
434 * napi_schedule - schedule NAPI poll
437 * Schedule NAPI poll routine to be called if it is not already
440 static inline void napi_schedule(struct napi_struct *n)
442 if (napi_schedule_prep(n))
447 * napi_schedule_irqoff - schedule NAPI poll
450 * Variant of napi_schedule(), assuming hard irqs are masked.
452 static inline void napi_schedule_irqoff(struct napi_struct *n)
454 if (napi_schedule_prep(n))
455 __napi_schedule_irqoff(n);
458 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
459 static inline bool napi_reschedule(struct napi_struct *napi)
461 if (napi_schedule_prep(napi)) {
462 __napi_schedule(napi);
468 bool napi_complete_done(struct napi_struct *n, int work_done);
470 * napi_complete - NAPI processing complete
473 * Mark NAPI processing as complete.
474 * Consider using napi_complete_done() instead.
475 * Return false if device should avoid rearming interrupts.
477 static inline bool napi_complete(struct napi_struct *n)
479 return napi_complete_done(n, 0);
483 * napi_hash_del - remove a NAPI from global table
484 * @napi: NAPI context
486 * Warning: caller must observe RCU grace period
487 * before freeing memory containing @napi, if
488 * this function returns true.
489 * Note: core networking stack automatically calls it
490 * from netif_napi_del().
491 * Drivers might want to call this helper to combine all
492 * the needed RCU grace periods into a single one.
494 bool napi_hash_del(struct napi_struct *napi);
497 * napi_disable - prevent NAPI from scheduling
500 * Stop NAPI from being scheduled on this context.
501 * Waits till any outstanding processing completes.
503 void napi_disable(struct napi_struct *n);
506 * napi_enable - enable NAPI scheduling
509 * Resume NAPI from being scheduled on this context.
510 * Must be paired with napi_disable.
512 static inline void napi_enable(struct napi_struct *n)
514 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
515 smp_mb__before_atomic();
516 clear_bit(NAPI_STATE_SCHED, &n->state);
517 clear_bit(NAPI_STATE_NPSVC, &n->state);
521 * napi_synchronize - wait until NAPI is not running
524 * Wait until NAPI is done being scheduled on this context.
525 * Waits till any outstanding processing completes but
526 * does not disable future activations.
528 static inline void napi_synchronize(const struct napi_struct *n)
530 if (IS_ENABLED(CONFIG_SMP))
531 while (test_bit(NAPI_STATE_SCHED, &n->state))
538 * napi_if_scheduled_mark_missed - if napi is running, set the
542 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
545 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
547 unsigned long val, new;
550 val = READ_ONCE(n->state);
551 if (val & NAPIF_STATE_DISABLE)
554 if (!(val & NAPIF_STATE_SCHED))
557 new = val | NAPIF_STATE_MISSED;
558 } while (cmpxchg(&n->state, val, new) != val);
563 enum netdev_queue_state_t {
564 __QUEUE_STATE_DRV_XOFF,
565 __QUEUE_STATE_STACK_XOFF,
566 __QUEUE_STATE_FROZEN,
569 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
570 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
571 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
573 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
574 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
576 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
580 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
581 * netif_tx_* functions below are used to manipulate this flag. The
582 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
583 * queue independently. The netif_xmit_*stopped functions below are called
584 * to check if the queue has been stopped by the driver or stack (either
585 * of the XOFF bits are set in the state). Drivers should not need to call
586 * netif_xmit*stopped functions, they should only be using netif_tx_*.
589 struct netdev_queue {
593 struct net_device *dev;
594 struct Qdisc __rcu *qdisc;
595 struct Qdisc *qdisc_sleeping;
599 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
602 unsigned long tx_maxrate;
604 * Number of TX timeouts for this queue
605 * (/sys/class/net/DEV/Q/trans_timeout)
607 unsigned long trans_timeout;
609 /* Subordinate device that the queue has been assigned to */
610 struct net_device *sb_dev;
611 #ifdef CONFIG_XDP_SOCKETS
612 struct xdp_umem *umem;
617 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
620 * Time (in jiffies) of last Tx
622 unsigned long trans_start;
629 } ____cacheline_aligned_in_smp;
631 extern int sysctl_fb_tunnels_only_for_init_net;
632 extern int sysctl_devconf_inherit_init_net;
634 static inline bool net_has_fallback_tunnels(const struct net *net)
636 return net == &init_net ||
637 !IS_ENABLED(CONFIG_SYSCTL) ||
638 !sysctl_fb_tunnels_only_for_init_net;
641 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
643 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
650 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
652 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
659 * This structure holds an RPS map which can be of variable length. The
660 * map is an array of CPUs.
667 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
670 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
671 * tail pointer for that CPU's input queue at the time of last enqueue, and
672 * a hardware filter index.
674 struct rps_dev_flow {
677 unsigned int last_qtail;
679 #define RPS_NO_FILTER 0xffff
682 * The rps_dev_flow_table structure contains a table of flow mappings.
684 struct rps_dev_flow_table {
687 struct rps_dev_flow flows[0];
689 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
690 ((_num) * sizeof(struct rps_dev_flow)))
693 * The rps_sock_flow_table contains mappings of flows to the last CPU
694 * on which they were processed by the application (set in recvmsg).
695 * Each entry is a 32bit value. Upper part is the high-order bits
696 * of flow hash, lower part is CPU number.
697 * rps_cpu_mask is used to partition the space, depending on number of
698 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
699 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
700 * meaning we use 32-6=26 bits for the hash.
702 struct rps_sock_flow_table {
705 u32 ents[0] ____cacheline_aligned_in_smp;
707 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
709 #define RPS_NO_CPU 0xffff
711 extern u32 rps_cpu_mask;
712 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
714 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
718 unsigned int index = hash & table->mask;
719 u32 val = hash & ~rps_cpu_mask;
721 /* We only give a hint, preemption can change CPU under us */
722 val |= raw_smp_processor_id();
724 if (table->ents[index] != val)
725 table->ents[index] = val;
729 #ifdef CONFIG_RFS_ACCEL
730 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
733 #endif /* CONFIG_RPS */
735 /* This structure contains an instance of an RX queue. */
736 struct netdev_rx_queue {
738 struct rps_map __rcu *rps_map;
739 struct rps_dev_flow_table __rcu *rps_flow_table;
742 struct net_device *dev;
743 struct xdp_rxq_info xdp_rxq;
744 #ifdef CONFIG_XDP_SOCKETS
745 struct xdp_umem *umem;
747 } ____cacheline_aligned_in_smp;
750 * RX queue sysfs structures and functions.
752 struct rx_queue_attribute {
753 struct attribute attr;
754 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
755 ssize_t (*store)(struct netdev_rx_queue *queue,
756 const char *buf, size_t len);
761 * This structure holds an XPS map which can be of variable length. The
762 * map is an array of queues.
766 unsigned int alloc_len;
770 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
771 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
772 - sizeof(struct xps_map)) / sizeof(u16))
775 * This structure holds all XPS maps for device. Maps are indexed by CPU.
777 struct xps_dev_maps {
779 struct xps_map __rcu *attr_map[0]; /* Either CPUs map or RXQs map */
782 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
783 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
785 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
786 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
788 #endif /* CONFIG_XPS */
790 #define TC_MAX_QUEUE 16
791 #define TC_BITMASK 15
792 /* HW offloaded queuing disciplines txq count and offset maps */
793 struct netdev_tc_txq {
798 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
800 * This structure is to hold information about the device
801 * configured to run FCoE protocol stack.
803 struct netdev_fcoe_hbainfo {
804 char manufacturer[64];
805 char serial_number[64];
806 char hardware_version[64];
807 char driver_version[64];
808 char optionrom_version[64];
809 char firmware_version[64];
811 char model_description[256];
815 #define MAX_PHYS_ITEM_ID_LEN 32
817 /* This structure holds a unique identifier to identify some
818 * physical item (port for example) used by a netdevice.
820 struct netdev_phys_item_id {
821 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
822 unsigned char id_len;
825 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
826 struct netdev_phys_item_id *b)
828 return a->id_len == b->id_len &&
829 memcmp(a->id, b->id, a->id_len) == 0;
832 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
834 struct net_device *sb_dev);
837 TC_SETUP_QDISC_MQPRIO,
840 TC_SETUP_CLSMATCHALL,
852 /* These structures hold the attributes of bpf state that are being passed
853 * to the netdevice through the bpf op.
855 enum bpf_netdev_command {
856 /* Set or clear a bpf program used in the earliest stages of packet
857 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
858 * is responsible for calling bpf_prog_put on any old progs that are
859 * stored. In case of error, the callee need not release the new prog
860 * reference, but on success it takes ownership and must bpf_prog_put
861 * when it is no longer used.
867 /* BPF program for offload callbacks, invoked at program load time. */
868 BPF_OFFLOAD_MAP_ALLOC,
869 BPF_OFFLOAD_MAP_FREE,
873 struct bpf_prog_offload_ops;
874 struct netlink_ext_ack;
878 enum bpf_netdev_command command;
883 struct bpf_prog *prog;
884 struct netlink_ext_ack *extack;
886 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
889 /* flags with which program was installed */
892 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
894 struct bpf_offloaded_map *offmap;
896 /* XDP_SETUP_XSK_UMEM */
898 struct xdp_umem *umem;
904 #ifdef CONFIG_XFRM_OFFLOAD
906 int (*xdo_dev_state_add) (struct xfrm_state *x);
907 void (*xdo_dev_state_delete) (struct xfrm_state *x);
908 void (*xdo_dev_state_free) (struct xfrm_state *x);
909 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
910 struct xfrm_state *x);
911 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
916 struct rcu_head rcuhead;
924 * This structure defines the management hooks for network devices.
925 * The following hooks can be defined; unless noted otherwise, they are
926 * optional and can be filled with a null pointer.
928 * int (*ndo_init)(struct net_device *dev);
929 * This function is called once when a network device is registered.
930 * The network device can use this for any late stage initialization
931 * or semantic validation. It can fail with an error code which will
932 * be propagated back to register_netdev.
934 * void (*ndo_uninit)(struct net_device *dev);
935 * This function is called when device is unregistered or when registration
936 * fails. It is not called if init fails.
938 * int (*ndo_open)(struct net_device *dev);
939 * This function is called when a network device transitions to the up
942 * int (*ndo_stop)(struct net_device *dev);
943 * This function is called when a network device transitions to the down
946 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
947 * struct net_device *dev);
948 * Called when a packet needs to be transmitted.
949 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
950 * the queue before that can happen; it's for obsolete devices and weird
951 * corner cases, but the stack really does a non-trivial amount
952 * of useless work if you return NETDEV_TX_BUSY.
953 * Required; cannot be NULL.
955 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
956 * struct net_device *dev
957 * netdev_features_t features);
958 * Called by core transmit path to determine if device is capable of
959 * performing offload operations on a given packet. This is to give
960 * the device an opportunity to implement any restrictions that cannot
961 * be otherwise expressed by feature flags. The check is called with
962 * the set of features that the stack has calculated and it returns
963 * those the driver believes to be appropriate.
965 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
966 * struct net_device *sb_dev);
967 * Called to decide which queue to use when device supports multiple
970 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
971 * This function is called to allow device receiver to make
972 * changes to configuration when multicast or promiscuous is enabled.
974 * void (*ndo_set_rx_mode)(struct net_device *dev);
975 * This function is called device changes address list filtering.
976 * If driver handles unicast address filtering, it should set
977 * IFF_UNICAST_FLT in its priv_flags.
979 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
980 * This function is called when the Media Access Control address
981 * needs to be changed. If this interface is not defined, the
982 * MAC address can not be changed.
984 * int (*ndo_validate_addr)(struct net_device *dev);
985 * Test if Media Access Control address is valid for the device.
987 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
988 * Called when a user requests an ioctl which can't be handled by
989 * the generic interface code. If not defined ioctls return
990 * not supported error code.
992 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
993 * Used to set network devices bus interface parameters. This interface
994 * is retained for legacy reasons; new devices should use the bus
995 * interface (PCI) for low level management.
997 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
998 * Called when a user wants to change the Maximum Transfer Unit
1001 * void (*ndo_tx_timeout)(struct net_device *dev);
1002 * Callback used when the transmitter has not made any progress
1003 * for dev->watchdog ticks.
1005 * void (*ndo_get_stats64)(struct net_device *dev,
1006 * struct rtnl_link_stats64 *storage);
1007 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1008 * Called when a user wants to get the network device usage
1009 * statistics. Drivers must do one of the following:
1010 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1011 * rtnl_link_stats64 structure passed by the caller.
1012 * 2. Define @ndo_get_stats to update a net_device_stats structure
1013 * (which should normally be dev->stats) and return a pointer to
1014 * it. The structure may be changed asynchronously only if each
1015 * field is written atomically.
1016 * 3. Update dev->stats asynchronously and atomically, and define
1017 * neither operation.
1019 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1020 * Return true if this device supports offload stats of this attr_id.
1022 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1024 * Get statistics for offload operations by attr_id. Write it into the
1025 * attr_data pointer.
1027 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1028 * If device supports VLAN filtering this function is called when a
1029 * VLAN id is registered.
1031 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1032 * If device supports VLAN filtering this function is called when a
1033 * VLAN id is unregistered.
1035 * void (*ndo_poll_controller)(struct net_device *dev);
1037 * SR-IOV management functions.
1038 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1039 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1040 * u8 qos, __be16 proto);
1041 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1043 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1044 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1045 * int (*ndo_get_vf_config)(struct net_device *dev,
1046 * int vf, struct ifla_vf_info *ivf);
1047 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1048 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1049 * struct nlattr *port[]);
1051 * Enable or disable the VF ability to query its RSS Redirection Table and
1052 * Hash Key. This is needed since on some devices VF share this information
1053 * with PF and querying it may introduce a theoretical security risk.
1054 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1055 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1056 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1058 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1059 * This is always called from the stack with the rtnl lock held and netif
1060 * tx queues stopped. This allows the netdevice to perform queue
1061 * management safely.
1063 * Fiber Channel over Ethernet (FCoE) offload functions.
1064 * int (*ndo_fcoe_enable)(struct net_device *dev);
1065 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1066 * so the underlying device can perform whatever needed configuration or
1067 * initialization to support acceleration of FCoE traffic.
1069 * int (*ndo_fcoe_disable)(struct net_device *dev);
1070 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1071 * so the underlying device can perform whatever needed clean-ups to
1072 * stop supporting acceleration of FCoE traffic.
1074 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1075 * struct scatterlist *sgl, unsigned int sgc);
1076 * Called when the FCoE Initiator wants to initialize an I/O that
1077 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1078 * perform necessary setup and returns 1 to indicate the device is set up
1079 * successfully to perform DDP on this I/O, otherwise this returns 0.
1081 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1082 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1083 * indicated by the FC exchange id 'xid', so the underlying device can
1084 * clean up and reuse resources for later DDP requests.
1086 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1087 * struct scatterlist *sgl, unsigned int sgc);
1088 * Called when the FCoE Target wants to initialize an I/O that
1089 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1090 * perform necessary setup and returns 1 to indicate the device is set up
1091 * successfully to perform DDP on this I/O, otherwise this returns 0.
1093 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1094 * struct netdev_fcoe_hbainfo *hbainfo);
1095 * Called when the FCoE Protocol stack wants information on the underlying
1096 * device. This information is utilized by the FCoE protocol stack to
1097 * register attributes with Fiber Channel management service as per the
1098 * FC-GS Fabric Device Management Information(FDMI) specification.
1100 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1101 * Called when the underlying device wants to override default World Wide
1102 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1103 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1104 * protocol stack to use.
1107 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1108 * u16 rxq_index, u32 flow_id);
1109 * Set hardware filter for RFS. rxq_index is the target queue index;
1110 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1111 * Return the filter ID on success, or a negative error code.
1113 * Slave management functions (for bridge, bonding, etc).
1114 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1115 * Called to make another netdev an underling.
1117 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1118 * Called to release previously enslaved netdev.
1120 * Feature/offload setting functions.
1121 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1122 * netdev_features_t features);
1123 * Adjusts the requested feature flags according to device-specific
1124 * constraints, and returns the resulting flags. Must not modify
1127 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1128 * Called to update device configuration to new features. Passed
1129 * feature set might be less than what was returned by ndo_fix_features()).
1130 * Must return >0 or -errno if it changed dev->features itself.
1132 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1133 * struct net_device *dev,
1134 * const unsigned char *addr, u16 vid, u16 flags,
1135 * struct netlink_ext_ack *extack);
1136 * Adds an FDB entry to dev for addr.
1137 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1138 * struct net_device *dev,
1139 * const unsigned char *addr, u16 vid)
1140 * Deletes the FDB entry from dev coresponding to addr.
1141 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1142 * struct net_device *dev, struct net_device *filter_dev,
1144 * Used to add FDB entries to dump requests. Implementers should add
1145 * entries to skb and update idx with the number of entries.
1147 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1148 * u16 flags, struct netlink_ext_ack *extack)
1149 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1150 * struct net_device *dev, u32 filter_mask,
1152 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1155 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1156 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1157 * which do not represent real hardware may define this to allow their
1158 * userspace components to manage their virtual carrier state. Devices
1159 * that determine carrier state from physical hardware properties (eg
1160 * network cables) or protocol-dependent mechanisms (eg
1161 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1163 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1164 * struct netdev_phys_item_id *ppid);
1165 * Called to get ID of physical port of this device. If driver does
1166 * not implement this, it is assumed that the hw is not able to have
1167 * multiple net devices on single physical port.
1169 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1170 * struct netdev_phys_item_id *ppid)
1171 * Called to get the parent ID of the physical port of this device.
1173 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1174 * struct udp_tunnel_info *ti);
1175 * Called by UDP tunnel to notify a driver about the UDP port and socket
1176 * address family that a UDP tunnel is listnening to. It is called only
1177 * when a new port starts listening. The operation is protected by the
1180 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1181 * struct udp_tunnel_info *ti);
1182 * Called by UDP tunnel to notify the driver about a UDP port and socket
1183 * address family that the UDP tunnel is not listening to anymore. The
1184 * operation is protected by the RTNL.
1186 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1187 * struct net_device *dev)
1188 * Called by upper layer devices to accelerate switching or other
1189 * station functionality into hardware. 'pdev is the lowerdev
1190 * to use for the offload and 'dev' is the net device that will
1191 * back the offload. Returns a pointer to the private structure
1192 * the upper layer will maintain.
1193 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1194 * Called by upper layer device to delete the station created
1195 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1196 * the station and priv is the structure returned by the add
1198 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1199 * int queue_index, u32 maxrate);
1200 * Called when a user wants to set a max-rate limitation of specific
1202 * int (*ndo_get_iflink)(const struct net_device *dev);
1203 * Called to get the iflink value of this device.
1204 * void (*ndo_change_proto_down)(struct net_device *dev,
1206 * This function is used to pass protocol port error state information
1207 * to the switch driver. The switch driver can react to the proto_down
1208 * by doing a phys down on the associated switch port.
1209 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1210 * This function is used to get egress tunnel information for given skb.
1211 * This is useful for retrieving outer tunnel header parameters while
1213 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1214 * This function is used to specify the headroom that the skb must
1215 * consider when allocation skb during packet reception. Setting
1216 * appropriate rx headroom value allows avoiding skb head copy on
1217 * forward. Setting a negative value resets the rx headroom to the
1219 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1220 * This function is used to set or query state related to XDP on the
1221 * netdevice and manage BPF offload. See definition of
1222 * enum bpf_netdev_command for details.
1223 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1225 * This function is used to submit @n XDP packets for transmit on a
1226 * netdevice. Returns number of frames successfully transmitted, frames
1227 * that got dropped are freed/returned via xdp_return_frame().
1228 * Returns negative number, means general error invoking ndo, meaning
1229 * no frames were xmit'ed and core-caller will free all frames.
1230 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1231 * Get devlink port instance associated with a given netdev.
1232 * Called with a reference on the netdevice and devlink locks only,
1233 * rtnl_lock is not held.
1235 struct net_device_ops {
1236 int (*ndo_init)(struct net_device *dev);
1237 void (*ndo_uninit)(struct net_device *dev);
1238 int (*ndo_open)(struct net_device *dev);
1239 int (*ndo_stop)(struct net_device *dev);
1240 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1241 struct net_device *dev);
1242 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1243 struct net_device *dev,
1244 netdev_features_t features);
1245 u16 (*ndo_select_queue)(struct net_device *dev,
1246 struct sk_buff *skb,
1247 struct net_device *sb_dev);
1248 void (*ndo_change_rx_flags)(struct net_device *dev,
1250 void (*ndo_set_rx_mode)(struct net_device *dev);
1251 int (*ndo_set_mac_address)(struct net_device *dev,
1253 int (*ndo_validate_addr)(struct net_device *dev);
1254 int (*ndo_do_ioctl)(struct net_device *dev,
1255 struct ifreq *ifr, int cmd);
1256 int (*ndo_set_config)(struct net_device *dev,
1258 int (*ndo_change_mtu)(struct net_device *dev,
1260 int (*ndo_neigh_setup)(struct net_device *dev,
1261 struct neigh_parms *);
1262 void (*ndo_tx_timeout) (struct net_device *dev);
1264 void (*ndo_get_stats64)(struct net_device *dev,
1265 struct rtnl_link_stats64 *storage);
1266 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1267 int (*ndo_get_offload_stats)(int attr_id,
1268 const struct net_device *dev,
1270 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1272 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1273 __be16 proto, u16 vid);
1274 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1275 __be16 proto, u16 vid);
1276 #ifdef CONFIG_NET_POLL_CONTROLLER
1277 void (*ndo_poll_controller)(struct net_device *dev);
1278 int (*ndo_netpoll_setup)(struct net_device *dev,
1279 struct netpoll_info *info);
1280 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1282 int (*ndo_set_vf_mac)(struct net_device *dev,
1283 int queue, u8 *mac);
1284 int (*ndo_set_vf_vlan)(struct net_device *dev,
1285 int queue, u16 vlan,
1286 u8 qos, __be16 proto);
1287 int (*ndo_set_vf_rate)(struct net_device *dev,
1288 int vf, int min_tx_rate,
1290 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1291 int vf, bool setting);
1292 int (*ndo_set_vf_trust)(struct net_device *dev,
1293 int vf, bool setting);
1294 int (*ndo_get_vf_config)(struct net_device *dev,
1296 struct ifla_vf_info *ivf);
1297 int (*ndo_set_vf_link_state)(struct net_device *dev,
1298 int vf, int link_state);
1299 int (*ndo_get_vf_stats)(struct net_device *dev,
1301 struct ifla_vf_stats
1303 int (*ndo_set_vf_port)(struct net_device *dev,
1305 struct nlattr *port[]);
1306 int (*ndo_get_vf_port)(struct net_device *dev,
1307 int vf, struct sk_buff *skb);
1308 int (*ndo_set_vf_guid)(struct net_device *dev,
1311 int (*ndo_set_vf_rss_query_en)(
1312 struct net_device *dev,
1313 int vf, bool setting);
1314 int (*ndo_setup_tc)(struct net_device *dev,
1315 enum tc_setup_type type,
1317 #if IS_ENABLED(CONFIG_FCOE)
1318 int (*ndo_fcoe_enable)(struct net_device *dev);
1319 int (*ndo_fcoe_disable)(struct net_device *dev);
1320 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1322 struct scatterlist *sgl,
1324 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1326 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1328 struct scatterlist *sgl,
1330 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1331 struct netdev_fcoe_hbainfo *hbainfo);
1334 #if IS_ENABLED(CONFIG_LIBFCOE)
1335 #define NETDEV_FCOE_WWNN 0
1336 #define NETDEV_FCOE_WWPN 1
1337 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1338 u64 *wwn, int type);
1341 #ifdef CONFIG_RFS_ACCEL
1342 int (*ndo_rx_flow_steer)(struct net_device *dev,
1343 const struct sk_buff *skb,
1347 int (*ndo_add_slave)(struct net_device *dev,
1348 struct net_device *slave_dev,
1349 struct netlink_ext_ack *extack);
1350 int (*ndo_del_slave)(struct net_device *dev,
1351 struct net_device *slave_dev);
1352 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1353 netdev_features_t features);
1354 int (*ndo_set_features)(struct net_device *dev,
1355 netdev_features_t features);
1356 int (*ndo_neigh_construct)(struct net_device *dev,
1357 struct neighbour *n);
1358 void (*ndo_neigh_destroy)(struct net_device *dev,
1359 struct neighbour *n);
1361 int (*ndo_fdb_add)(struct ndmsg *ndm,
1362 struct nlattr *tb[],
1363 struct net_device *dev,
1364 const unsigned char *addr,
1367 struct netlink_ext_ack *extack);
1368 int (*ndo_fdb_del)(struct ndmsg *ndm,
1369 struct nlattr *tb[],
1370 struct net_device *dev,
1371 const unsigned char *addr,
1373 int (*ndo_fdb_dump)(struct sk_buff *skb,
1374 struct netlink_callback *cb,
1375 struct net_device *dev,
1376 struct net_device *filter_dev,
1378 int (*ndo_fdb_get)(struct sk_buff *skb,
1379 struct nlattr *tb[],
1380 struct net_device *dev,
1381 const unsigned char *addr,
1382 u16 vid, u32 portid, u32 seq,
1383 struct netlink_ext_ack *extack);
1384 int (*ndo_bridge_setlink)(struct net_device *dev,
1385 struct nlmsghdr *nlh,
1387 struct netlink_ext_ack *extack);
1388 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1390 struct net_device *dev,
1393 int (*ndo_bridge_dellink)(struct net_device *dev,
1394 struct nlmsghdr *nlh,
1396 int (*ndo_change_carrier)(struct net_device *dev,
1398 int (*ndo_get_phys_port_id)(struct net_device *dev,
1399 struct netdev_phys_item_id *ppid);
1400 int (*ndo_get_port_parent_id)(struct net_device *dev,
1401 struct netdev_phys_item_id *ppid);
1402 int (*ndo_get_phys_port_name)(struct net_device *dev,
1403 char *name, size_t len);
1404 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1405 struct udp_tunnel_info *ti);
1406 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1407 struct udp_tunnel_info *ti);
1408 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1409 struct net_device *dev);
1410 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1413 int (*ndo_get_lock_subclass)(struct net_device *dev);
1414 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1417 int (*ndo_get_iflink)(const struct net_device *dev);
1418 int (*ndo_change_proto_down)(struct net_device *dev,
1420 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1421 struct sk_buff *skb);
1422 void (*ndo_set_rx_headroom)(struct net_device *dev,
1423 int needed_headroom);
1424 int (*ndo_bpf)(struct net_device *dev,
1425 struct netdev_bpf *bpf);
1426 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1427 struct xdp_frame **xdp,
1429 int (*ndo_xsk_async_xmit)(struct net_device *dev,
1431 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1435 * enum net_device_priv_flags - &struct net_device priv_flags
1437 * These are the &struct net_device, they are only set internally
1438 * by drivers and used in the kernel. These flags are invisible to
1439 * userspace; this means that the order of these flags can change
1440 * during any kernel release.
1442 * You should have a pretty good reason to be extending these flags.
1444 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1445 * @IFF_EBRIDGE: Ethernet bridging device
1446 * @IFF_BONDING: bonding master or slave
1447 * @IFF_ISATAP: ISATAP interface (RFC4214)
1448 * @IFF_WAN_HDLC: WAN HDLC device
1449 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1451 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1452 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1453 * @IFF_MACVLAN_PORT: device used as macvlan port
1454 * @IFF_BRIDGE_PORT: device used as bridge port
1455 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1456 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1457 * @IFF_UNICAST_FLT: Supports unicast filtering
1458 * @IFF_TEAM_PORT: device used as team port
1459 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1460 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1461 * change when it's running
1462 * @IFF_MACVLAN: Macvlan device
1463 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1464 * underlying stacked devices
1465 * @IFF_L3MDEV_MASTER: device is an L3 master device
1466 * @IFF_NO_QUEUE: device can run without qdisc attached
1467 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1468 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1469 * @IFF_TEAM: device is a team device
1470 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1471 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1472 * entity (i.e. the master device for bridged veth)
1473 * @IFF_MACSEC: device is a MACsec device
1474 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1475 * @IFF_FAILOVER: device is a failover master device
1476 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1477 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1478 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1480 enum netdev_priv_flags {
1481 IFF_802_1Q_VLAN = 1<<0,
1485 IFF_WAN_HDLC = 1<<4,
1486 IFF_XMIT_DST_RELEASE = 1<<5,
1487 IFF_DONT_BRIDGE = 1<<6,
1488 IFF_DISABLE_NETPOLL = 1<<7,
1489 IFF_MACVLAN_PORT = 1<<8,
1490 IFF_BRIDGE_PORT = 1<<9,
1491 IFF_OVS_DATAPATH = 1<<10,
1492 IFF_TX_SKB_SHARING = 1<<11,
1493 IFF_UNICAST_FLT = 1<<12,
1494 IFF_TEAM_PORT = 1<<13,
1495 IFF_SUPP_NOFCS = 1<<14,
1496 IFF_LIVE_ADDR_CHANGE = 1<<15,
1497 IFF_MACVLAN = 1<<16,
1498 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1499 IFF_L3MDEV_MASTER = 1<<18,
1500 IFF_NO_QUEUE = 1<<19,
1501 IFF_OPENVSWITCH = 1<<20,
1502 IFF_L3MDEV_SLAVE = 1<<21,
1504 IFF_RXFH_CONFIGURED = 1<<23,
1505 IFF_PHONY_HEADROOM = 1<<24,
1507 IFF_NO_RX_HANDLER = 1<<26,
1508 IFF_FAILOVER = 1<<27,
1509 IFF_FAILOVER_SLAVE = 1<<28,
1510 IFF_L3MDEV_RX_HANDLER = 1<<29,
1511 IFF_LIVE_RENAME_OK = 1<<30,
1514 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1515 #define IFF_EBRIDGE IFF_EBRIDGE
1516 #define IFF_BONDING IFF_BONDING
1517 #define IFF_ISATAP IFF_ISATAP
1518 #define IFF_WAN_HDLC IFF_WAN_HDLC
1519 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1520 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1521 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1522 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1523 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1524 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1525 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1526 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1527 #define IFF_TEAM_PORT IFF_TEAM_PORT
1528 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1529 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1530 #define IFF_MACVLAN IFF_MACVLAN
1531 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1532 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1533 #define IFF_NO_QUEUE IFF_NO_QUEUE
1534 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1535 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1536 #define IFF_TEAM IFF_TEAM
1537 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1538 #define IFF_MACSEC IFF_MACSEC
1539 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1540 #define IFF_FAILOVER IFF_FAILOVER
1541 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1542 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1543 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1546 * struct net_device - The DEVICE structure.
1548 * Actually, this whole structure is a big mistake. It mixes I/O
1549 * data with strictly "high-level" data, and it has to know about
1550 * almost every data structure used in the INET module.
1552 * @name: This is the first field of the "visible" part of this structure
1553 * (i.e. as seen by users in the "Space.c" file). It is the name
1556 * @name_hlist: Device name hash chain, please keep it close to name[]
1557 * @ifalias: SNMP alias
1558 * @mem_end: Shared memory end
1559 * @mem_start: Shared memory start
1560 * @base_addr: Device I/O address
1561 * @irq: Device IRQ number
1563 * @state: Generic network queuing layer state, see netdev_state_t
1564 * @dev_list: The global list of network devices
1565 * @napi_list: List entry used for polling NAPI devices
1566 * @unreg_list: List entry when we are unregistering the
1567 * device; see the function unregister_netdev
1568 * @close_list: List entry used when we are closing the device
1569 * @ptype_all: Device-specific packet handlers for all protocols
1570 * @ptype_specific: Device-specific, protocol-specific packet handlers
1572 * @adj_list: Directly linked devices, like slaves for bonding
1573 * @features: Currently active device features
1574 * @hw_features: User-changeable features
1576 * @wanted_features: User-requested features
1577 * @vlan_features: Mask of features inheritable by VLAN devices
1579 * @hw_enc_features: Mask of features inherited by encapsulating devices
1580 * This field indicates what encapsulation
1581 * offloads the hardware is capable of doing,
1582 * and drivers will need to set them appropriately.
1584 * @mpls_features: Mask of features inheritable by MPLS
1586 * @ifindex: interface index
1587 * @group: The group the device belongs to
1589 * @stats: Statistics struct, which was left as a legacy, use
1590 * rtnl_link_stats64 instead
1592 * @rx_dropped: Dropped packets by core network,
1593 * do not use this in drivers
1594 * @tx_dropped: Dropped packets by core network,
1595 * do not use this in drivers
1596 * @rx_nohandler: nohandler dropped packets by core network on
1597 * inactive devices, do not use this in drivers
1598 * @carrier_up_count: Number of times the carrier has been up
1599 * @carrier_down_count: Number of times the carrier has been down
1601 * @wireless_handlers: List of functions to handle Wireless Extensions,
1603 * see <net/iw_handler.h> for details.
1604 * @wireless_data: Instance data managed by the core of wireless extensions
1606 * @netdev_ops: Includes several pointers to callbacks,
1607 * if one wants to override the ndo_*() functions
1608 * @ethtool_ops: Management operations
1609 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1610 * discovery handling. Necessary for e.g. 6LoWPAN.
1611 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1612 * of Layer 2 headers.
1614 * @flags: Interface flags (a la BSD)
1615 * @priv_flags: Like 'flags' but invisible to userspace,
1616 * see if.h for the definitions
1617 * @gflags: Global flags ( kept as legacy )
1618 * @padded: How much padding added by alloc_netdev()
1619 * @operstate: RFC2863 operstate
1620 * @link_mode: Mapping policy to operstate
1621 * @if_port: Selectable AUI, TP, ...
1623 * @mtu: Interface MTU value
1624 * @min_mtu: Interface Minimum MTU value
1625 * @max_mtu: Interface Maximum MTU value
1626 * @type: Interface hardware type
1627 * @hard_header_len: Maximum hardware header length.
1628 * @min_header_len: Minimum hardware header length
1630 * @needed_headroom: Extra headroom the hardware may need, but not in all
1631 * cases can this be guaranteed
1632 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1633 * cases can this be guaranteed. Some cases also use
1634 * LL_MAX_HEADER instead to allocate the skb
1636 * interface address info:
1638 * @perm_addr: Permanent hw address
1639 * @addr_assign_type: Hw address assignment type
1640 * @addr_len: Hardware address length
1641 * @neigh_priv_len: Used in neigh_alloc()
1642 * @dev_id: Used to differentiate devices that share
1643 * the same link layer address
1644 * @dev_port: Used to differentiate devices that share
1646 * @addr_list_lock: XXX: need comments on this one
1647 * @uc_promisc: Counter that indicates promiscuous mode
1648 * has been enabled due to the need to listen to
1649 * additional unicast addresses in a device that
1650 * does not implement ndo_set_rx_mode()
1651 * @uc: unicast mac addresses
1652 * @mc: multicast mac addresses
1653 * @dev_addrs: list of device hw addresses
1654 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1655 * @promiscuity: Number of times the NIC is told to work in
1656 * promiscuous mode; if it becomes 0 the NIC will
1657 * exit promiscuous mode
1658 * @allmulti: Counter, enables or disables allmulticast mode
1660 * @vlan_info: VLAN info
1661 * @dsa_ptr: dsa specific data
1662 * @tipc_ptr: TIPC specific data
1663 * @atalk_ptr: AppleTalk link
1664 * @ip_ptr: IPv4 specific data
1665 * @dn_ptr: DECnet specific data
1666 * @ip6_ptr: IPv6 specific data
1667 * @ax25_ptr: AX.25 specific data
1668 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1670 * @dev_addr: Hw address (before bcast,
1671 * because most packets are unicast)
1673 * @_rx: Array of RX queues
1674 * @num_rx_queues: Number of RX queues
1675 * allocated at register_netdev() time
1676 * @real_num_rx_queues: Number of RX queues currently active in device
1678 * @rx_handler: handler for received packets
1679 * @rx_handler_data: XXX: need comments on this one
1680 * @miniq_ingress: ingress/clsact qdisc specific data for
1681 * ingress processing
1682 * @ingress_queue: XXX: need comments on this one
1683 * @broadcast: hw bcast address
1685 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1686 * indexed by RX queue number. Assigned by driver.
1687 * This must only be set if the ndo_rx_flow_steer
1688 * operation is defined
1689 * @index_hlist: Device index hash chain
1691 * @_tx: Array of TX queues
1692 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1693 * @real_num_tx_queues: Number of TX queues currently active in device
1694 * @qdisc: Root qdisc from userspace point of view
1695 * @tx_queue_len: Max frames per queue allowed
1696 * @tx_global_lock: XXX: need comments on this one
1698 * @xps_maps: XXX: need comments on this one
1699 * @miniq_egress: clsact qdisc specific data for
1701 * @watchdog_timeo: Represents the timeout that is used by
1702 * the watchdog (see dev_watchdog())
1703 * @watchdog_timer: List of timers
1705 * @pcpu_refcnt: Number of references to this device
1706 * @todo_list: Delayed register/unregister
1707 * @link_watch_list: XXX: need comments on this one
1709 * @reg_state: Register/unregister state machine
1710 * @dismantle: Device is going to be freed
1711 * @rtnl_link_state: This enum represents the phases of creating
1714 * @needs_free_netdev: Should unregister perform free_netdev?
1715 * @priv_destructor: Called from unregister
1716 * @npinfo: XXX: need comments on this one
1717 * @nd_net: Network namespace this network device is inside
1719 * @ml_priv: Mid-layer private
1720 * @lstats: Loopback statistics
1721 * @tstats: Tunnel statistics
1722 * @dstats: Dummy statistics
1723 * @vstats: Virtual ethernet statistics
1728 * @dev: Class/net/name entry
1729 * @sysfs_groups: Space for optional device, statistics and wireless
1732 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1733 * @rtnl_link_ops: Rtnl_link_ops
1735 * @gso_max_size: Maximum size of generic segmentation offload
1736 * @gso_max_segs: Maximum number of segments that can be passed to the
1739 * @dcbnl_ops: Data Center Bridging netlink ops
1740 * @num_tc: Number of traffic classes in the net device
1741 * @tc_to_txq: XXX: need comments on this one
1742 * @prio_tc_map: XXX: need comments on this one
1744 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1746 * @priomap: XXX: need comments on this one
1747 * @phydev: Physical device may attach itself
1748 * for hardware timestamping
1749 * @sfp_bus: attached &struct sfp_bus structure.
1751 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1752 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1754 * @proto_down: protocol port state information can be sent to the
1755 * switch driver and used to set the phys state of the
1758 * @wol_enabled: Wake-on-LAN is enabled
1760 * FIXME: cleanup struct net_device such that network protocol info
1765 char name[IFNAMSIZ];
1766 struct hlist_node name_hlist;
1767 struct dev_ifalias __rcu *ifalias;
1769 * I/O specific fields
1770 * FIXME: Merge these and struct ifmap into one
1772 unsigned long mem_end;
1773 unsigned long mem_start;
1774 unsigned long base_addr;
1778 * Some hardware also needs these fields (state,dev_list,
1779 * napi_list,unreg_list,close_list) but they are not
1780 * part of the usual set specified in Space.c.
1783 unsigned long state;
1785 struct list_head dev_list;
1786 struct list_head napi_list;
1787 struct list_head unreg_list;
1788 struct list_head close_list;
1789 struct list_head ptype_all;
1790 struct list_head ptype_specific;
1793 struct list_head upper;
1794 struct list_head lower;
1797 netdev_features_t features;
1798 netdev_features_t hw_features;
1799 netdev_features_t wanted_features;
1800 netdev_features_t vlan_features;
1801 netdev_features_t hw_enc_features;
1802 netdev_features_t mpls_features;
1803 netdev_features_t gso_partial_features;
1808 struct net_device_stats stats;
1810 atomic_long_t rx_dropped;
1811 atomic_long_t tx_dropped;
1812 atomic_long_t rx_nohandler;
1814 /* Stats to monitor link on/off, flapping */
1815 atomic_t carrier_up_count;
1816 atomic_t carrier_down_count;
1818 #ifdef CONFIG_WIRELESS_EXT
1819 const struct iw_handler_def *wireless_handlers;
1820 struct iw_public_data *wireless_data;
1822 const struct net_device_ops *netdev_ops;
1823 const struct ethtool_ops *ethtool_ops;
1824 #ifdef CONFIG_NET_L3_MASTER_DEV
1825 const struct l3mdev_ops *l3mdev_ops;
1827 #if IS_ENABLED(CONFIG_IPV6)
1828 const struct ndisc_ops *ndisc_ops;
1831 #ifdef CONFIG_XFRM_OFFLOAD
1832 const struct xfrmdev_ops *xfrmdev_ops;
1835 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1836 const struct tlsdev_ops *tlsdev_ops;
1839 const struct header_ops *header_ops;
1842 unsigned int priv_flags;
1844 unsigned short gflags;
1845 unsigned short padded;
1847 unsigned char operstate;
1848 unsigned char link_mode;
1850 unsigned char if_port;
1854 unsigned int min_mtu;
1855 unsigned int max_mtu;
1856 unsigned short type;
1857 unsigned short hard_header_len;
1858 unsigned char min_header_len;
1860 unsigned short needed_headroom;
1861 unsigned short needed_tailroom;
1863 /* Interface address info. */
1864 unsigned char perm_addr[MAX_ADDR_LEN];
1865 unsigned char addr_assign_type;
1866 unsigned char addr_len;
1867 unsigned short neigh_priv_len;
1868 unsigned short dev_id;
1869 unsigned short dev_port;
1870 spinlock_t addr_list_lock;
1871 unsigned char name_assign_type;
1873 struct netdev_hw_addr_list uc;
1874 struct netdev_hw_addr_list mc;
1875 struct netdev_hw_addr_list dev_addrs;
1878 struct kset *queues_kset;
1880 unsigned int promiscuity;
1881 unsigned int allmulti;
1884 /* Protocol-specific pointers */
1886 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1887 struct vlan_info __rcu *vlan_info;
1889 #if IS_ENABLED(CONFIG_NET_DSA)
1890 struct dsa_port *dsa_ptr;
1892 #if IS_ENABLED(CONFIG_TIPC)
1893 struct tipc_bearer __rcu *tipc_ptr;
1895 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1898 struct in_device __rcu *ip_ptr;
1899 #if IS_ENABLED(CONFIG_DECNET)
1900 struct dn_dev __rcu *dn_ptr;
1902 struct inet6_dev __rcu *ip6_ptr;
1903 #if IS_ENABLED(CONFIG_AX25)
1906 struct wireless_dev *ieee80211_ptr;
1907 struct wpan_dev *ieee802154_ptr;
1908 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1909 struct mpls_dev __rcu *mpls_ptr;
1913 * Cache lines mostly used on receive path (including eth_type_trans())
1915 /* Interface address info used in eth_type_trans() */
1916 unsigned char *dev_addr;
1918 struct netdev_rx_queue *_rx;
1919 unsigned int num_rx_queues;
1920 unsigned int real_num_rx_queues;
1922 struct bpf_prog __rcu *xdp_prog;
1923 unsigned long gro_flush_timeout;
1924 rx_handler_func_t __rcu *rx_handler;
1925 void __rcu *rx_handler_data;
1927 #ifdef CONFIG_NET_CLS_ACT
1928 struct mini_Qdisc __rcu *miniq_ingress;
1930 struct netdev_queue __rcu *ingress_queue;
1931 #ifdef CONFIG_NETFILTER_INGRESS
1932 struct nf_hook_entries __rcu *nf_hooks_ingress;
1935 unsigned char broadcast[MAX_ADDR_LEN];
1936 #ifdef CONFIG_RFS_ACCEL
1937 struct cpu_rmap *rx_cpu_rmap;
1939 struct hlist_node index_hlist;
1942 * Cache lines mostly used on transmit path
1944 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1945 unsigned int num_tx_queues;
1946 unsigned int real_num_tx_queues;
1947 struct Qdisc *qdisc;
1948 #ifdef CONFIG_NET_SCHED
1949 DECLARE_HASHTABLE (qdisc_hash, 4);
1951 unsigned int tx_queue_len;
1952 spinlock_t tx_global_lock;
1956 struct xps_dev_maps __rcu *xps_cpus_map;
1957 struct xps_dev_maps __rcu *xps_rxqs_map;
1959 #ifdef CONFIG_NET_CLS_ACT
1960 struct mini_Qdisc __rcu *miniq_egress;
1963 /* These may be needed for future network-power-down code. */
1964 struct timer_list watchdog_timer;
1966 int __percpu *pcpu_refcnt;
1967 struct list_head todo_list;
1969 struct list_head link_watch_list;
1971 enum { NETREG_UNINITIALIZED=0,
1972 NETREG_REGISTERED, /* completed register_netdevice */
1973 NETREG_UNREGISTERING, /* called unregister_netdevice */
1974 NETREG_UNREGISTERED, /* completed unregister todo */
1975 NETREG_RELEASED, /* called free_netdev */
1976 NETREG_DUMMY, /* dummy device for NAPI poll */
1982 RTNL_LINK_INITIALIZED,
1983 RTNL_LINK_INITIALIZING,
1984 } rtnl_link_state:16;
1986 bool needs_free_netdev;
1987 void (*priv_destructor)(struct net_device *dev);
1989 #ifdef CONFIG_NETPOLL
1990 struct netpoll_info __rcu *npinfo;
1993 possible_net_t nd_net;
1995 /* mid-layer private */
1998 struct pcpu_lstats __percpu *lstats;
1999 struct pcpu_sw_netstats __percpu *tstats;
2000 struct pcpu_dstats __percpu *dstats;
2003 #if IS_ENABLED(CONFIG_GARP)
2004 struct garp_port __rcu *garp_port;
2006 #if IS_ENABLED(CONFIG_MRP)
2007 struct mrp_port __rcu *mrp_port;
2011 const struct attribute_group *sysfs_groups[4];
2012 const struct attribute_group *sysfs_rx_queue_group;
2014 const struct rtnl_link_ops *rtnl_link_ops;
2016 /* for setting kernel sock attribute on TCP connection setup */
2017 #define GSO_MAX_SIZE 65536
2018 unsigned int gso_max_size;
2019 #define GSO_MAX_SEGS 65535
2023 const struct dcbnl_rtnl_ops *dcbnl_ops;
2026 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2027 u8 prio_tc_map[TC_BITMASK + 1];
2029 #if IS_ENABLED(CONFIG_FCOE)
2030 unsigned int fcoe_ddp_xid;
2032 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2033 struct netprio_map __rcu *priomap;
2035 struct phy_device *phydev;
2036 struct sfp_bus *sfp_bus;
2037 struct lock_class_key *qdisc_tx_busylock;
2038 struct lock_class_key *qdisc_running_key;
2040 unsigned wol_enabled:1;
2042 #define to_net_dev(d) container_of(d, struct net_device, dev)
2044 static inline bool netif_elide_gro(const struct net_device *dev)
2046 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2051 #define NETDEV_ALIGN 32
2054 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2056 return dev->prio_tc_map[prio & TC_BITMASK];
2060 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2062 if (tc >= dev->num_tc)
2065 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2069 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2070 void netdev_reset_tc(struct net_device *dev);
2071 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2072 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2075 int netdev_get_num_tc(struct net_device *dev)
2080 void netdev_unbind_sb_channel(struct net_device *dev,
2081 struct net_device *sb_dev);
2082 int netdev_bind_sb_channel_queue(struct net_device *dev,
2083 struct net_device *sb_dev,
2084 u8 tc, u16 count, u16 offset);
2085 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2086 static inline int netdev_get_sb_channel(struct net_device *dev)
2088 return max_t(int, -dev->num_tc, 0);
2092 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2095 return &dev->_tx[index];
2098 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2099 const struct sk_buff *skb)
2101 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2104 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2105 void (*f)(struct net_device *,
2106 struct netdev_queue *,
2112 for (i = 0; i < dev->num_tx_queues; i++)
2113 f(dev, &dev->_tx[i], arg);
2116 #define netdev_lockdep_set_classes(dev) \
2118 static struct lock_class_key qdisc_tx_busylock_key; \
2119 static struct lock_class_key qdisc_running_key; \
2120 static struct lock_class_key qdisc_xmit_lock_key; \
2121 static struct lock_class_key dev_addr_list_lock_key; \
2124 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2125 (dev)->qdisc_running_key = &qdisc_running_key; \
2126 lockdep_set_class(&(dev)->addr_list_lock, \
2127 &dev_addr_list_lock_key); \
2128 for (i = 0; i < (dev)->num_tx_queues; i++) \
2129 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2130 &qdisc_xmit_lock_key); \
2133 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2134 struct net_device *sb_dev);
2135 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2136 struct sk_buff *skb,
2137 struct net_device *sb_dev);
2139 /* returns the headroom that the master device needs to take in account
2140 * when forwarding to this dev
2142 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2144 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2147 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2149 if (dev->netdev_ops->ndo_set_rx_headroom)
2150 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2153 /* set the device rx headroom to the dev's default */
2154 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2156 netdev_set_rx_headroom(dev, -1);
2160 * Net namespace inlines
2163 struct net *dev_net(const struct net_device *dev)
2165 return read_pnet(&dev->nd_net);
2169 void dev_net_set(struct net_device *dev, struct net *net)
2171 write_pnet(&dev->nd_net, net);
2175 * netdev_priv - access network device private data
2176 * @dev: network device
2178 * Get network device private data
2180 static inline void *netdev_priv(const struct net_device *dev)
2182 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2185 /* Set the sysfs physical device reference for the network logical device
2186 * if set prior to registration will cause a symlink during initialization.
2188 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2190 /* Set the sysfs device type for the network logical device to allow
2191 * fine-grained identification of different network device types. For
2192 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2194 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2196 /* Default NAPI poll() weight
2197 * Device drivers are strongly advised to not use bigger value
2199 #define NAPI_POLL_WEIGHT 64
2202 * netif_napi_add - initialize a NAPI context
2203 * @dev: network device
2204 * @napi: NAPI context
2205 * @poll: polling function
2206 * @weight: default weight
2208 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2209 * *any* of the other NAPI-related functions.
2211 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2212 int (*poll)(struct napi_struct *, int), int weight);
2215 * netif_tx_napi_add - initialize a NAPI context
2216 * @dev: network device
2217 * @napi: NAPI context
2218 * @poll: polling function
2219 * @weight: default weight
2221 * This variant of netif_napi_add() should be used from drivers using NAPI
2222 * to exclusively poll a TX queue.
2223 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2225 static inline void netif_tx_napi_add(struct net_device *dev,
2226 struct napi_struct *napi,
2227 int (*poll)(struct napi_struct *, int),
2230 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2231 netif_napi_add(dev, napi, poll, weight);
2235 * netif_napi_del - remove a NAPI context
2236 * @napi: NAPI context
2238 * netif_napi_del() removes a NAPI context from the network device NAPI list
2240 void netif_napi_del(struct napi_struct *napi);
2242 struct napi_gro_cb {
2243 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2246 /* Length of frag0. */
2247 unsigned int frag0_len;
2249 /* This indicates where we are processing relative to skb->data. */
2252 /* This is non-zero if the packet cannot be merged with the new skb. */
2255 /* Save the IP ID here and check when we get to the transport layer */
2258 /* Number of segments aggregated. */
2261 /* Start offset for remote checksum offload */
2262 u16 gro_remcsum_start;
2264 /* jiffies when first packet was created/queued */
2267 /* Used in ipv6_gro_receive() and foo-over-udp */
2270 /* This is non-zero if the packet may be of the same flow. */
2273 /* Used in tunnel GRO receive */
2276 /* GRO checksum is valid */
2279 /* Number of checksums via CHECKSUM_UNNECESSARY */
2284 #define NAPI_GRO_FREE 1
2285 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2287 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2290 /* Used in GRE, set in fou/gue_gro_receive */
2293 /* Used to determine if flush_id can be ignored */
2296 /* Number of gro_receive callbacks this packet already went through */
2297 u8 recursion_counter:4;
2301 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2304 /* used in skb_gro_receive() slow path */
2305 struct sk_buff *last;
2308 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2310 #define GRO_RECURSION_LIMIT 15
2311 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2313 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2316 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2317 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2318 struct list_head *head,
2319 struct sk_buff *skb)
2321 if (unlikely(gro_recursion_inc_test(skb))) {
2322 NAPI_GRO_CB(skb)->flush |= 1;
2326 return cb(head, skb);
2329 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2331 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2333 struct list_head *head,
2334 struct sk_buff *skb)
2336 if (unlikely(gro_recursion_inc_test(skb))) {
2337 NAPI_GRO_CB(skb)->flush |= 1;
2341 return cb(sk, head, skb);
2344 struct packet_type {
2345 __be16 type; /* This is really htons(ether_type). */
2346 bool ignore_outgoing;
2347 struct net_device *dev; /* NULL is wildcarded here */
2348 int (*func) (struct sk_buff *,
2349 struct net_device *,
2350 struct packet_type *,
2351 struct net_device *);
2352 void (*list_func) (struct list_head *,
2353 struct packet_type *,
2354 struct net_device *);
2355 bool (*id_match)(struct packet_type *ptype,
2357 void *af_packet_priv;
2358 struct list_head list;
2361 struct offload_callbacks {
2362 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2363 netdev_features_t features);
2364 struct sk_buff *(*gro_receive)(struct list_head *head,
2365 struct sk_buff *skb);
2366 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2369 struct packet_offload {
2370 __be16 type; /* This is really htons(ether_type). */
2372 struct offload_callbacks callbacks;
2373 struct list_head list;
2376 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2377 struct pcpu_sw_netstats {
2382 struct u64_stats_sync syncp;
2383 } __aligned(4 * sizeof(u64));
2385 struct pcpu_lstats {
2388 struct u64_stats_sync syncp;
2389 } __aligned(2 * sizeof(u64));
2391 #define __netdev_alloc_pcpu_stats(type, gfp) \
2393 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2396 for_each_possible_cpu(__cpu) { \
2397 typeof(type) *stat; \
2398 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2399 u64_stats_init(&stat->syncp); \
2405 #define netdev_alloc_pcpu_stats(type) \
2406 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2408 enum netdev_lag_tx_type {
2409 NETDEV_LAG_TX_TYPE_UNKNOWN,
2410 NETDEV_LAG_TX_TYPE_RANDOM,
2411 NETDEV_LAG_TX_TYPE_BROADCAST,
2412 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2413 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2414 NETDEV_LAG_TX_TYPE_HASH,
2417 enum netdev_lag_hash {
2418 NETDEV_LAG_HASH_NONE,
2420 NETDEV_LAG_HASH_L34,
2421 NETDEV_LAG_HASH_L23,
2422 NETDEV_LAG_HASH_E23,
2423 NETDEV_LAG_HASH_E34,
2424 NETDEV_LAG_HASH_UNKNOWN,
2427 struct netdev_lag_upper_info {
2428 enum netdev_lag_tx_type tx_type;
2429 enum netdev_lag_hash hash_type;
2432 struct netdev_lag_lower_state_info {
2437 #include <linux/notifier.h>
2439 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2440 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2444 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2446 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2447 detected a hardware crash and restarted
2448 - we can use this eg to kick tcp sessions
2450 NETDEV_CHANGE, /* Notify device state change */
2453 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2454 NETDEV_CHANGEADDR, /* notify after the address change */
2455 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2459 NETDEV_BONDING_FAILOVER,
2461 NETDEV_PRE_TYPE_CHANGE,
2462 NETDEV_POST_TYPE_CHANGE,
2465 NETDEV_NOTIFY_PEERS,
2469 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2470 NETDEV_CHANGEINFODATA,
2471 NETDEV_BONDING_INFO,
2472 NETDEV_PRECHANGEUPPER,
2473 NETDEV_CHANGELOWERSTATE,
2474 NETDEV_UDP_TUNNEL_PUSH_INFO,
2475 NETDEV_UDP_TUNNEL_DROP_INFO,
2476 NETDEV_CHANGE_TX_QUEUE_LEN,
2477 NETDEV_CVLAN_FILTER_PUSH_INFO,
2478 NETDEV_CVLAN_FILTER_DROP_INFO,
2479 NETDEV_SVLAN_FILTER_PUSH_INFO,
2480 NETDEV_SVLAN_FILTER_DROP_INFO,
2482 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2484 int register_netdevice_notifier(struct notifier_block *nb);
2485 int unregister_netdevice_notifier(struct notifier_block *nb);
2487 struct netdev_notifier_info {
2488 struct net_device *dev;
2489 struct netlink_ext_ack *extack;
2492 struct netdev_notifier_info_ext {
2493 struct netdev_notifier_info info; /* must be first */
2499 struct netdev_notifier_change_info {
2500 struct netdev_notifier_info info; /* must be first */
2501 unsigned int flags_changed;
2504 struct netdev_notifier_changeupper_info {
2505 struct netdev_notifier_info info; /* must be first */
2506 struct net_device *upper_dev; /* new upper dev */
2507 bool master; /* is upper dev master */
2508 bool linking; /* is the notification for link or unlink */
2509 void *upper_info; /* upper dev info */
2512 struct netdev_notifier_changelowerstate_info {
2513 struct netdev_notifier_info info; /* must be first */
2514 void *lower_state_info; /* is lower dev state */
2517 struct netdev_notifier_pre_changeaddr_info {
2518 struct netdev_notifier_info info; /* must be first */
2519 const unsigned char *dev_addr;
2522 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2523 struct net_device *dev)
2526 info->extack = NULL;
2529 static inline struct net_device *
2530 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2535 static inline struct netlink_ext_ack *
2536 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2538 return info->extack;
2541 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2544 extern rwlock_t dev_base_lock; /* Device list lock */
2546 #define for_each_netdev(net, d) \
2547 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2548 #define for_each_netdev_reverse(net, d) \
2549 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2550 #define for_each_netdev_rcu(net, d) \
2551 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2552 #define for_each_netdev_safe(net, d, n) \
2553 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2554 #define for_each_netdev_continue(net, d) \
2555 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2556 #define for_each_netdev_continue_rcu(net, d) \
2557 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2558 #define for_each_netdev_in_bond_rcu(bond, slave) \
2559 for_each_netdev_rcu(&init_net, slave) \
2560 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2561 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2563 static inline struct net_device *next_net_device(struct net_device *dev)
2565 struct list_head *lh;
2569 lh = dev->dev_list.next;
2570 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2573 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2575 struct list_head *lh;
2579 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2580 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2583 static inline struct net_device *first_net_device(struct net *net)
2585 return list_empty(&net->dev_base_head) ? NULL :
2586 net_device_entry(net->dev_base_head.next);
2589 static inline struct net_device *first_net_device_rcu(struct net *net)
2591 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2593 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2596 int netdev_boot_setup_check(struct net_device *dev);
2597 unsigned long netdev_boot_base(const char *prefix, int unit);
2598 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2599 const char *hwaddr);
2600 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2601 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2602 void dev_add_pack(struct packet_type *pt);
2603 void dev_remove_pack(struct packet_type *pt);
2604 void __dev_remove_pack(struct packet_type *pt);
2605 void dev_add_offload(struct packet_offload *po);
2606 void dev_remove_offload(struct packet_offload *po);
2608 int dev_get_iflink(const struct net_device *dev);
2609 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2610 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2611 unsigned short mask);
2612 struct net_device *dev_get_by_name(struct net *net, const char *name);
2613 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2614 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2615 int dev_alloc_name(struct net_device *dev, const char *name);
2616 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2617 void dev_close(struct net_device *dev);
2618 void dev_close_many(struct list_head *head, bool unlink);
2619 void dev_disable_lro(struct net_device *dev);
2620 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2621 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2622 struct net_device *sb_dev);
2623 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2624 struct net_device *sb_dev);
2625 int dev_queue_xmit(struct sk_buff *skb);
2626 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2627 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2628 int register_netdevice(struct net_device *dev);
2629 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2630 void unregister_netdevice_many(struct list_head *head);
2631 static inline void unregister_netdevice(struct net_device *dev)
2633 unregister_netdevice_queue(dev, NULL);
2636 int netdev_refcnt_read(const struct net_device *dev);
2637 void free_netdev(struct net_device *dev);
2638 void netdev_freemem(struct net_device *dev);
2639 void synchronize_net(void);
2640 int init_dummy_netdev(struct net_device *dev);
2642 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2643 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2644 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2645 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2646 int netdev_get_name(struct net *net, char *name, int ifindex);
2647 int dev_restart(struct net_device *dev);
2648 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2650 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2652 return NAPI_GRO_CB(skb)->data_offset;
2655 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2657 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2660 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2662 NAPI_GRO_CB(skb)->data_offset += len;
2665 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2666 unsigned int offset)
2668 return NAPI_GRO_CB(skb)->frag0 + offset;
2671 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2673 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2676 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2678 NAPI_GRO_CB(skb)->frag0 = NULL;
2679 NAPI_GRO_CB(skb)->frag0_len = 0;
2682 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2683 unsigned int offset)
2685 if (!pskb_may_pull(skb, hlen))
2688 skb_gro_frag0_invalidate(skb);
2689 return skb->data + offset;
2692 static inline void *skb_gro_network_header(struct sk_buff *skb)
2694 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2695 skb_network_offset(skb);
2698 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2699 const void *start, unsigned int len)
2701 if (NAPI_GRO_CB(skb)->csum_valid)
2702 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2703 csum_partial(start, len, 0));
2706 /* GRO checksum functions. These are logical equivalents of the normal
2707 * checksum functions (in skbuff.h) except that they operate on the GRO
2708 * offsets and fields in sk_buff.
2711 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2713 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2715 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2718 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2722 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2723 skb_checksum_start_offset(skb) <
2724 skb_gro_offset(skb)) &&
2725 !skb_at_gro_remcsum_start(skb) &&
2726 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2727 (!zero_okay || check));
2730 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2733 if (NAPI_GRO_CB(skb)->csum_valid &&
2734 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2737 NAPI_GRO_CB(skb)->csum = psum;
2739 return __skb_gro_checksum_complete(skb);
2742 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2744 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2745 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2746 NAPI_GRO_CB(skb)->csum_cnt--;
2748 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2749 * verified a new top level checksum or an encapsulated one
2750 * during GRO. This saves work if we fallback to normal path.
2752 __skb_incr_checksum_unnecessary(skb);
2756 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2759 __sum16 __ret = 0; \
2760 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2761 __ret = __skb_gro_checksum_validate_complete(skb, \
2762 compute_pseudo(skb, proto)); \
2764 skb_gro_incr_csum_unnecessary(skb); \
2768 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2769 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2771 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2773 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2775 #define skb_gro_checksum_simple_validate(skb) \
2776 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2778 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2780 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2781 !NAPI_GRO_CB(skb)->csum_valid);
2784 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2785 __sum16 check, __wsum pseudo)
2787 NAPI_GRO_CB(skb)->csum = ~pseudo;
2788 NAPI_GRO_CB(skb)->csum_valid = 1;
2791 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2793 if (__skb_gro_checksum_convert_check(skb)) \
2794 __skb_gro_checksum_convert(skb, check, \
2795 compute_pseudo(skb, proto)); \
2798 struct gro_remcsum {
2803 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2809 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2810 unsigned int off, size_t hdrlen,
2811 int start, int offset,
2812 struct gro_remcsum *grc,
2816 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2818 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2821 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2825 ptr = skb_gro_header_fast(skb, off);
2826 if (skb_gro_header_hard(skb, off + plen)) {
2827 ptr = skb_gro_header_slow(skb, off + plen, off);
2832 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2835 /* Adjust skb->csum since we changed the packet */
2836 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2838 grc->offset = off + hdrlen + offset;
2844 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2845 struct gro_remcsum *grc)
2848 size_t plen = grc->offset + sizeof(u16);
2853 ptr = skb_gro_header_fast(skb, grc->offset);
2854 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2855 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2860 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2863 #ifdef CONFIG_XFRM_OFFLOAD
2864 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2866 if (PTR_ERR(pp) != -EINPROGRESS)
2867 NAPI_GRO_CB(skb)->flush |= flush;
2869 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2872 struct gro_remcsum *grc)
2874 if (PTR_ERR(pp) != -EINPROGRESS) {
2875 NAPI_GRO_CB(skb)->flush |= flush;
2876 skb_gro_remcsum_cleanup(skb, grc);
2877 skb->remcsum_offload = 0;
2881 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2883 NAPI_GRO_CB(skb)->flush |= flush;
2885 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2888 struct gro_remcsum *grc)
2890 NAPI_GRO_CB(skb)->flush |= flush;
2891 skb_gro_remcsum_cleanup(skb, grc);
2892 skb->remcsum_offload = 0;
2896 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2897 unsigned short type,
2898 const void *daddr, const void *saddr,
2901 if (!dev->header_ops || !dev->header_ops->create)
2904 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2907 static inline int dev_parse_header(const struct sk_buff *skb,
2908 unsigned char *haddr)
2910 const struct net_device *dev = skb->dev;
2912 if (!dev->header_ops || !dev->header_ops->parse)
2914 return dev->header_ops->parse(skb, haddr);
2917 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2919 const struct net_device *dev = skb->dev;
2921 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2923 return dev->header_ops->parse_protocol(skb);
2926 /* ll_header must have at least hard_header_len allocated */
2927 static inline bool dev_validate_header(const struct net_device *dev,
2928 char *ll_header, int len)
2930 if (likely(len >= dev->hard_header_len))
2932 if (len < dev->min_header_len)
2935 if (capable(CAP_SYS_RAWIO)) {
2936 memset(ll_header + len, 0, dev->hard_header_len - len);
2940 if (dev->header_ops && dev->header_ops->validate)
2941 return dev->header_ops->validate(ll_header, len);
2946 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2948 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2949 static inline int unregister_gifconf(unsigned int family)
2951 return register_gifconf(family, NULL);
2954 #ifdef CONFIG_NET_FLOW_LIMIT
2955 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2956 struct sd_flow_limit {
2958 unsigned int num_buckets;
2959 unsigned int history_head;
2960 u16 history[FLOW_LIMIT_HISTORY];
2964 extern int netdev_flow_limit_table_len;
2965 #endif /* CONFIG_NET_FLOW_LIMIT */
2968 * Incoming packets are placed on per-CPU queues
2970 struct softnet_data {
2971 struct list_head poll_list;
2972 struct sk_buff_head process_queue;
2975 unsigned int processed;
2976 unsigned int time_squeeze;
2977 unsigned int received_rps;
2979 struct softnet_data *rps_ipi_list;
2981 #ifdef CONFIG_NET_FLOW_LIMIT
2982 struct sd_flow_limit __rcu *flow_limit;
2984 struct Qdisc *output_queue;
2985 struct Qdisc **output_queue_tailp;
2986 struct sk_buff *completion_queue;
2987 #ifdef CONFIG_XFRM_OFFLOAD
2988 struct sk_buff_head xfrm_backlog;
2990 /* written and read only by owning cpu: */
2996 /* input_queue_head should be written by cpu owning this struct,
2997 * and only read by other cpus. Worth using a cache line.
2999 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3001 /* Elements below can be accessed between CPUs for RPS/RFS */
3002 call_single_data_t csd ____cacheline_aligned_in_smp;
3003 struct softnet_data *rps_ipi_next;
3005 unsigned int input_queue_tail;
3007 unsigned int dropped;
3008 struct sk_buff_head input_pkt_queue;
3009 struct napi_struct backlog;
3013 static inline void input_queue_head_incr(struct softnet_data *sd)
3016 sd->input_queue_head++;
3020 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3021 unsigned int *qtail)
3024 *qtail = ++sd->input_queue_tail;
3028 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3030 static inline int dev_recursion_level(void)
3032 return this_cpu_read(softnet_data.xmit.recursion);
3035 #define XMIT_RECURSION_LIMIT 10
3036 static inline bool dev_xmit_recursion(void)
3038 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3039 XMIT_RECURSION_LIMIT);
3042 static inline void dev_xmit_recursion_inc(void)
3044 __this_cpu_inc(softnet_data.xmit.recursion);
3047 static inline void dev_xmit_recursion_dec(void)
3049 __this_cpu_dec(softnet_data.xmit.recursion);
3052 void __netif_schedule(struct Qdisc *q);
3053 void netif_schedule_queue(struct netdev_queue *txq);
3055 static inline void netif_tx_schedule_all(struct net_device *dev)
3059 for (i = 0; i < dev->num_tx_queues; i++)
3060 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3063 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3065 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3069 * netif_start_queue - allow transmit
3070 * @dev: network device
3072 * Allow upper layers to call the device hard_start_xmit routine.
3074 static inline void netif_start_queue(struct net_device *dev)
3076 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3079 static inline void netif_tx_start_all_queues(struct net_device *dev)
3083 for (i = 0; i < dev->num_tx_queues; i++) {
3084 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3085 netif_tx_start_queue(txq);
3089 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3092 * netif_wake_queue - restart transmit
3093 * @dev: network device
3095 * Allow upper layers to call the device hard_start_xmit routine.
3096 * Used for flow control when transmit resources are available.
3098 static inline void netif_wake_queue(struct net_device *dev)
3100 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3103 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3107 for (i = 0; i < dev->num_tx_queues; i++) {
3108 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3109 netif_tx_wake_queue(txq);
3113 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3115 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3119 * netif_stop_queue - stop transmitted packets
3120 * @dev: network device
3122 * Stop upper layers calling the device hard_start_xmit routine.
3123 * Used for flow control when transmit resources are unavailable.
3125 static inline void netif_stop_queue(struct net_device *dev)
3127 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3130 void netif_tx_stop_all_queues(struct net_device *dev);
3132 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3134 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3138 * netif_queue_stopped - test if transmit queue is flowblocked
3139 * @dev: network device
3141 * Test if transmit queue on device is currently unable to send.
3143 static inline bool netif_queue_stopped(const struct net_device *dev)
3145 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3148 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3150 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3154 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3156 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3160 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3162 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3166 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3167 * @dev_queue: pointer to transmit queue
3169 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3170 * to give appropriate hint to the CPU.
3172 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3175 prefetchw(&dev_queue->dql.num_queued);
3180 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3181 * @dev_queue: pointer to transmit queue
3183 * BQL enabled drivers might use this helper in their TX completion path,
3184 * to give appropriate hint to the CPU.
3186 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3189 prefetchw(&dev_queue->dql.limit);
3193 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3197 dql_queued(&dev_queue->dql, bytes);
3199 if (likely(dql_avail(&dev_queue->dql) >= 0))
3202 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3205 * The XOFF flag must be set before checking the dql_avail below,
3206 * because in netdev_tx_completed_queue we update the dql_completed
3207 * before checking the XOFF flag.
3211 /* check again in case another CPU has just made room avail */
3212 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3213 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3217 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3218 * that they should not test BQL status themselves.
3219 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3221 * Returns true if the doorbell must be used to kick the NIC.
3223 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3229 dql_queued(&dev_queue->dql, bytes);
3231 return netif_tx_queue_stopped(dev_queue);
3233 netdev_tx_sent_queue(dev_queue, bytes);
3238 * netdev_sent_queue - report the number of bytes queued to hardware
3239 * @dev: network device
3240 * @bytes: number of bytes queued to the hardware device queue
3242 * Report the number of bytes queued for sending/completion to the network
3243 * device hardware queue. @bytes should be a good approximation and should
3244 * exactly match netdev_completed_queue() @bytes
3246 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3248 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3251 static inline bool __netdev_sent_queue(struct net_device *dev,
3255 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3259 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3260 unsigned int pkts, unsigned int bytes)
3263 if (unlikely(!bytes))
3266 dql_completed(&dev_queue->dql, bytes);
3269 * Without the memory barrier there is a small possiblity that
3270 * netdev_tx_sent_queue will miss the update and cause the queue to
3271 * be stopped forever
3275 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3278 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3279 netif_schedule_queue(dev_queue);
3284 * netdev_completed_queue - report bytes and packets completed by device
3285 * @dev: network device
3286 * @pkts: actual number of packets sent over the medium
3287 * @bytes: actual number of bytes sent over the medium
3289 * Report the number of bytes and packets transmitted by the network device
3290 * hardware queue over the physical medium, @bytes must exactly match the
3291 * @bytes amount passed to netdev_sent_queue()
3293 static inline void netdev_completed_queue(struct net_device *dev,
3294 unsigned int pkts, unsigned int bytes)
3296 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3299 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3302 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3308 * netdev_reset_queue - reset the packets and bytes count of a network device
3309 * @dev_queue: network device
3311 * Reset the bytes and packet count of a network device and clear the
3312 * software flow control OFF bit for this network device
3314 static inline void netdev_reset_queue(struct net_device *dev_queue)
3316 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3320 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3321 * @dev: network device
3322 * @queue_index: given tx queue index
3324 * Returns 0 if given tx queue index >= number of device tx queues,
3325 * otherwise returns the originally passed tx queue index.
3327 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3329 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3330 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3331 dev->name, queue_index,
3332 dev->real_num_tx_queues);
3340 * netif_running - test if up
3341 * @dev: network device
3343 * Test if the device has been brought up.
3345 static inline bool netif_running(const struct net_device *dev)
3347 return test_bit(__LINK_STATE_START, &dev->state);
3351 * Routines to manage the subqueues on a device. We only need start,
3352 * stop, and a check if it's stopped. All other device management is
3353 * done at the overall netdevice level.
3354 * Also test the device if we're multiqueue.
3358 * netif_start_subqueue - allow sending packets on subqueue
3359 * @dev: network device
3360 * @queue_index: sub queue index
3362 * Start individual transmit queue of a device with multiple transmit queues.
3364 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3366 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3368 netif_tx_start_queue(txq);
3372 * netif_stop_subqueue - stop sending packets on subqueue
3373 * @dev: network device
3374 * @queue_index: sub queue index
3376 * Stop individual transmit queue of a device with multiple transmit queues.
3378 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3380 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3381 netif_tx_stop_queue(txq);
3385 * netif_subqueue_stopped - test status of subqueue
3386 * @dev: network device
3387 * @queue_index: sub queue index
3389 * Check individual transmit queue of a device with multiple transmit queues.
3391 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3394 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3396 return netif_tx_queue_stopped(txq);
3399 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3400 struct sk_buff *skb)
3402 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3406 * netif_wake_subqueue - allow sending packets on subqueue
3407 * @dev: network device
3408 * @queue_index: sub queue index
3410 * Resume individual transmit queue of a device with multiple transmit queues.
3412 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3414 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3416 netif_tx_wake_queue(txq);
3420 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3422 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3423 u16 index, bool is_rxqs_map);
3426 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3427 * @j: CPU/Rx queue index
3428 * @mask: bitmask of all cpus/rx queues
3429 * @nr_bits: number of bits in the bitmask
3431 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3433 static inline bool netif_attr_test_mask(unsigned long j,
3434 const unsigned long *mask,
3435 unsigned int nr_bits)
3437 cpu_max_bits_warn(j, nr_bits);
3438 return test_bit(j, mask);
3442 * netif_attr_test_online - Test for online CPU/Rx queue
3443 * @j: CPU/Rx queue index
3444 * @online_mask: bitmask for CPUs/Rx queues that are online
3445 * @nr_bits: number of bits in the bitmask
3447 * Returns true if a CPU/Rx queue is online.
3449 static inline bool netif_attr_test_online(unsigned long j,
3450 const unsigned long *online_mask,
3451 unsigned int nr_bits)
3453 cpu_max_bits_warn(j, nr_bits);
3456 return test_bit(j, online_mask);
3458 return (j < nr_bits);
3462 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3463 * @n: CPU/Rx queue index
3464 * @srcp: the cpumask/Rx queue mask pointer
3465 * @nr_bits: number of bits in the bitmask
3467 * Returns >= nr_bits if no further CPUs/Rx queues set.
3469 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3470 unsigned int nr_bits)
3472 /* -1 is a legal arg here. */
3474 cpu_max_bits_warn(n, nr_bits);
3477 return find_next_bit(srcp, nr_bits, n + 1);
3483 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3484 * @n: CPU/Rx queue index
3485 * @src1p: the first CPUs/Rx queues mask pointer
3486 * @src2p: the second CPUs/Rx queues mask pointer
3487 * @nr_bits: number of bits in the bitmask
3489 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3491 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3492 const unsigned long *src2p,
3493 unsigned int nr_bits)
3495 /* -1 is a legal arg here. */
3497 cpu_max_bits_warn(n, nr_bits);
3500 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3502 return find_next_bit(src1p, nr_bits, n + 1);
3504 return find_next_bit(src2p, nr_bits, n + 1);
3509 static inline int netif_set_xps_queue(struct net_device *dev,
3510 const struct cpumask *mask,
3516 static inline int __netif_set_xps_queue(struct net_device *dev,
3517 const unsigned long *mask,
3518 u16 index, bool is_rxqs_map)
3525 * netif_is_multiqueue - test if device has multiple transmit queues
3526 * @dev: network device
3528 * Check if device has multiple transmit queues
3530 static inline bool netif_is_multiqueue(const struct net_device *dev)
3532 return dev->num_tx_queues > 1;
3535 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3538 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3540 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3543 dev->real_num_rx_queues = rxqs;
3548 static inline struct netdev_rx_queue *
3549 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3551 return dev->_rx + rxq;
3555 static inline unsigned int get_netdev_rx_queue_index(
3556 struct netdev_rx_queue *queue)
3558 struct net_device *dev = queue->dev;
3559 int index = queue - dev->_rx;
3561 BUG_ON(index >= dev->num_rx_queues);
3566 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3567 int netif_get_num_default_rss_queues(void);
3569 enum skb_free_reason {
3570 SKB_REASON_CONSUMED,
3574 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3575 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3578 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3579 * interrupt context or with hardware interrupts being disabled.
3580 * (in_irq() || irqs_disabled())
3582 * We provide four helpers that can be used in following contexts :
3584 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3585 * replacing kfree_skb(skb)
3587 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3588 * Typically used in place of consume_skb(skb) in TX completion path
3590 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3591 * replacing kfree_skb(skb)
3593 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3594 * and consumed a packet. Used in place of consume_skb(skb)
3596 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3598 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3601 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3603 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3606 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3608 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3611 static inline void dev_consume_skb_any(struct sk_buff *skb)
3613 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3616 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3617 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3618 int netif_rx(struct sk_buff *skb);
3619 int netif_rx_ni(struct sk_buff *skb);
3620 int netif_receive_skb(struct sk_buff *skb);
3621 int netif_receive_skb_core(struct sk_buff *skb);
3622 void netif_receive_skb_list(struct list_head *head);
3623 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3624 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3625 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3626 gro_result_t napi_gro_frags(struct napi_struct *napi);
3627 struct packet_offload *gro_find_receive_by_type(__be16 type);
3628 struct packet_offload *gro_find_complete_by_type(__be16 type);
3630 static inline void napi_free_frags(struct napi_struct *napi)
3632 kfree_skb(napi->skb);
3636 bool netdev_is_rx_handler_busy(struct net_device *dev);
3637 int netdev_rx_handler_register(struct net_device *dev,
3638 rx_handler_func_t *rx_handler,
3639 void *rx_handler_data);
3640 void netdev_rx_handler_unregister(struct net_device *dev);
3642 bool dev_valid_name(const char *name);
3643 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3644 bool *need_copyout);
3645 int dev_ifconf(struct net *net, struct ifconf *, int);
3646 int dev_ethtool(struct net *net, struct ifreq *);
3647 unsigned int dev_get_flags(const struct net_device *);
3648 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3649 struct netlink_ext_ack *extack);
3650 int dev_change_flags(struct net_device *dev, unsigned int flags,
3651 struct netlink_ext_ack *extack);
3652 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3653 unsigned int gchanges);
3654 int dev_change_name(struct net_device *, const char *);
3655 int dev_set_alias(struct net_device *, const char *, size_t);
3656 int dev_get_alias(const struct net_device *, char *, size_t);
3657 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3658 int __dev_set_mtu(struct net_device *, int);
3659 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3660 struct netlink_ext_ack *extack);
3661 int dev_set_mtu(struct net_device *, int);
3662 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3663 void dev_set_group(struct net_device *, int);
3664 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3665 struct netlink_ext_ack *extack);
3666 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3667 struct netlink_ext_ack *extack);
3668 int dev_change_carrier(struct net_device *, bool new_carrier);
3669 int dev_get_phys_port_id(struct net_device *dev,
3670 struct netdev_phys_item_id *ppid);
3671 int dev_get_phys_port_name(struct net_device *dev,
3672 char *name, size_t len);
3673 int dev_get_port_parent_id(struct net_device *dev,
3674 struct netdev_phys_item_id *ppid, bool recurse);
3675 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3676 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3677 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3678 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3679 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3680 struct netdev_queue *txq, int *ret);
3682 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3683 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3685 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3686 enum bpf_netdev_command cmd);
3687 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3689 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3690 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3691 bool is_skb_forwardable(const struct net_device *dev,
3692 const struct sk_buff *skb);
3694 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3695 struct sk_buff *skb)
3697 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3698 unlikely(!is_skb_forwardable(dev, skb))) {
3699 atomic_long_inc(&dev->rx_dropped);
3704 skb_scrub_packet(skb, true);
3709 bool dev_nit_active(struct net_device *dev);
3710 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3712 extern int netdev_budget;
3713 extern unsigned int netdev_budget_usecs;
3715 /* Called by rtnetlink.c:rtnl_unlock() */
3716 void netdev_run_todo(void);
3719 * dev_put - release reference to device
3720 * @dev: network device
3722 * Release reference to device to allow it to be freed.
3724 static inline void dev_put(struct net_device *dev)
3726 this_cpu_dec(*dev->pcpu_refcnt);
3730 * dev_hold - get reference to device
3731 * @dev: network device
3733 * Hold reference to device to keep it from being freed.
3735 static inline void dev_hold(struct net_device *dev)
3737 this_cpu_inc(*dev->pcpu_refcnt);
3740 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3741 * and _off may be called from IRQ context, but it is caller
3742 * who is responsible for serialization of these calls.
3744 * The name carrier is inappropriate, these functions should really be
3745 * called netif_lowerlayer_*() because they represent the state of any
3746 * kind of lower layer not just hardware media.
3749 void linkwatch_init_dev(struct net_device *dev);
3750 void linkwatch_fire_event(struct net_device *dev);
3751 void linkwatch_forget_dev(struct net_device *dev);
3754 * netif_carrier_ok - test if carrier present
3755 * @dev: network device
3757 * Check if carrier is present on device
3759 static inline bool netif_carrier_ok(const struct net_device *dev)
3761 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3764 unsigned long dev_trans_start(struct net_device *dev);
3766 void __netdev_watchdog_up(struct net_device *dev);
3768 void netif_carrier_on(struct net_device *dev);
3770 void netif_carrier_off(struct net_device *dev);
3773 * netif_dormant_on - mark device as dormant.
3774 * @dev: network device
3776 * Mark device as dormant (as per RFC2863).
3778 * The dormant state indicates that the relevant interface is not
3779 * actually in a condition to pass packets (i.e., it is not 'up') but is
3780 * in a "pending" state, waiting for some external event. For "on-
3781 * demand" interfaces, this new state identifies the situation where the
3782 * interface is waiting for events to place it in the up state.
3784 static inline void netif_dormant_on(struct net_device *dev)
3786 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3787 linkwatch_fire_event(dev);
3791 * netif_dormant_off - set device as not dormant.
3792 * @dev: network device
3794 * Device is not in dormant state.
3796 static inline void netif_dormant_off(struct net_device *dev)
3798 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3799 linkwatch_fire_event(dev);
3803 * netif_dormant - test if device is dormant
3804 * @dev: network device
3806 * Check if device is dormant.
3808 static inline bool netif_dormant(const struct net_device *dev)
3810 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3815 * netif_oper_up - test if device is operational
3816 * @dev: network device
3818 * Check if carrier is operational
3820 static inline bool netif_oper_up(const struct net_device *dev)
3822 return (dev->operstate == IF_OPER_UP ||
3823 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3827 * netif_device_present - is device available or removed
3828 * @dev: network device
3830 * Check if device has not been removed from system.
3832 static inline bool netif_device_present(struct net_device *dev)
3834 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3837 void netif_device_detach(struct net_device *dev);
3839 void netif_device_attach(struct net_device *dev);
3842 * Network interface message level settings
3846 NETIF_MSG_DRV = 0x0001,
3847 NETIF_MSG_PROBE = 0x0002,
3848 NETIF_MSG_LINK = 0x0004,
3849 NETIF_MSG_TIMER = 0x0008,
3850 NETIF_MSG_IFDOWN = 0x0010,
3851 NETIF_MSG_IFUP = 0x0020,
3852 NETIF_MSG_RX_ERR = 0x0040,
3853 NETIF_MSG_TX_ERR = 0x0080,
3854 NETIF_MSG_TX_QUEUED = 0x0100,
3855 NETIF_MSG_INTR = 0x0200,
3856 NETIF_MSG_TX_DONE = 0x0400,
3857 NETIF_MSG_RX_STATUS = 0x0800,
3858 NETIF_MSG_PKTDATA = 0x1000,
3859 NETIF_MSG_HW = 0x2000,
3860 NETIF_MSG_WOL = 0x4000,
3863 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3864 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3865 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3866 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3867 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3868 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3869 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3870 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3871 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3872 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3873 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3874 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3875 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3876 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3877 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3879 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3882 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3883 return default_msg_enable_bits;
3884 if (debug_value == 0) /* no output */
3886 /* set low N bits */
3887 return (1U << debug_value) - 1;
3890 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3892 spin_lock(&txq->_xmit_lock);
3893 txq->xmit_lock_owner = cpu;
3896 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3898 __acquire(&txq->_xmit_lock);
3902 static inline void __netif_tx_release(struct netdev_queue *txq)
3904 __release(&txq->_xmit_lock);
3907 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3909 spin_lock_bh(&txq->_xmit_lock);
3910 txq->xmit_lock_owner = smp_processor_id();
3913 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3915 bool ok = spin_trylock(&txq->_xmit_lock);
3917 txq->xmit_lock_owner = smp_processor_id();
3921 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3923 txq->xmit_lock_owner = -1;
3924 spin_unlock(&txq->_xmit_lock);
3927 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3929 txq->xmit_lock_owner = -1;
3930 spin_unlock_bh(&txq->_xmit_lock);
3933 static inline void txq_trans_update(struct netdev_queue *txq)
3935 if (txq->xmit_lock_owner != -1)
3936 txq->trans_start = jiffies;
3939 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3940 static inline void netif_trans_update(struct net_device *dev)
3942 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3944 if (txq->trans_start != jiffies)
3945 txq->trans_start = jiffies;
3949 * netif_tx_lock - grab network device transmit lock
3950 * @dev: network device
3952 * Get network device transmit lock
3954 static inline void netif_tx_lock(struct net_device *dev)
3959 spin_lock(&dev->tx_global_lock);
3960 cpu = smp_processor_id();
3961 for (i = 0; i < dev->num_tx_queues; i++) {
3962 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3964 /* We are the only thread of execution doing a
3965 * freeze, but we have to grab the _xmit_lock in
3966 * order to synchronize with threads which are in
3967 * the ->hard_start_xmit() handler and already
3968 * checked the frozen bit.
3970 __netif_tx_lock(txq, cpu);
3971 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3972 __netif_tx_unlock(txq);
3976 static inline void netif_tx_lock_bh(struct net_device *dev)
3982 static inline void netif_tx_unlock(struct net_device *dev)
3986 for (i = 0; i < dev->num_tx_queues; i++) {
3987 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3989 /* No need to grab the _xmit_lock here. If the
3990 * queue is not stopped for another reason, we
3993 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3994 netif_schedule_queue(txq);
3996 spin_unlock(&dev->tx_global_lock);
3999 static inline void netif_tx_unlock_bh(struct net_device *dev)
4001 netif_tx_unlock(dev);
4005 #define HARD_TX_LOCK(dev, txq, cpu) { \
4006 if ((dev->features & NETIF_F_LLTX) == 0) { \
4007 __netif_tx_lock(txq, cpu); \
4009 __netif_tx_acquire(txq); \
4013 #define HARD_TX_TRYLOCK(dev, txq) \
4014 (((dev->features & NETIF_F_LLTX) == 0) ? \
4015 __netif_tx_trylock(txq) : \
4016 __netif_tx_acquire(txq))
4018 #define HARD_TX_UNLOCK(dev, txq) { \
4019 if ((dev->features & NETIF_F_LLTX) == 0) { \
4020 __netif_tx_unlock(txq); \
4022 __netif_tx_release(txq); \
4026 static inline void netif_tx_disable(struct net_device *dev)
4032 cpu = smp_processor_id();
4033 for (i = 0; i < dev->num_tx_queues; i++) {
4034 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4036 __netif_tx_lock(txq, cpu);
4037 netif_tx_stop_queue(txq);
4038 __netif_tx_unlock(txq);
4043 static inline void netif_addr_lock(struct net_device *dev)
4045 spin_lock(&dev->addr_list_lock);
4048 static inline void netif_addr_lock_nested(struct net_device *dev)
4050 int subclass = SINGLE_DEPTH_NESTING;
4052 if (dev->netdev_ops->ndo_get_lock_subclass)
4053 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
4055 spin_lock_nested(&dev->addr_list_lock, subclass);
4058 static inline void netif_addr_lock_bh(struct net_device *dev)
4060 spin_lock_bh(&dev->addr_list_lock);
4063 static inline void netif_addr_unlock(struct net_device *dev)
4065 spin_unlock(&dev->addr_list_lock);
4068 static inline void netif_addr_unlock_bh(struct net_device *dev)
4070 spin_unlock_bh(&dev->addr_list_lock);
4074 * dev_addrs walker. Should be used only for read access. Call with
4075 * rcu_read_lock held.
4077 #define for_each_dev_addr(dev, ha) \
4078 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4080 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4082 void ether_setup(struct net_device *dev);
4084 /* Support for loadable net-drivers */
4085 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4086 unsigned char name_assign_type,
4087 void (*setup)(struct net_device *),
4088 unsigned int txqs, unsigned int rxqs);
4089 int dev_get_valid_name(struct net *net, struct net_device *dev,
4092 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4093 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4095 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4096 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4099 int register_netdev(struct net_device *dev);
4100 void unregister_netdev(struct net_device *dev);
4102 /* General hardware address lists handling functions */
4103 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4104 struct netdev_hw_addr_list *from_list, int addr_len);
4105 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4106 struct netdev_hw_addr_list *from_list, int addr_len);
4107 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4108 struct net_device *dev,
4109 int (*sync)(struct net_device *, const unsigned char *),
4110 int (*unsync)(struct net_device *,
4111 const unsigned char *));
4112 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4113 struct net_device *dev,
4114 int (*sync)(struct net_device *,
4115 const unsigned char *, int),
4116 int (*unsync)(struct net_device *,
4117 const unsigned char *, int));
4118 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4119 struct net_device *dev,
4120 int (*unsync)(struct net_device *,
4121 const unsigned char *, int));
4122 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4123 struct net_device *dev,
4124 int (*unsync)(struct net_device *,
4125 const unsigned char *));
4126 void __hw_addr_init(struct netdev_hw_addr_list *list);
4128 /* Functions used for device addresses handling */
4129 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4130 unsigned char addr_type);
4131 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4132 unsigned char addr_type);
4133 void dev_addr_flush(struct net_device *dev);
4134 int dev_addr_init(struct net_device *dev);
4136 /* Functions used for unicast addresses handling */
4137 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4138 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4139 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4140 int dev_uc_sync(struct net_device *to, struct net_device *from);
4141 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4142 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4143 void dev_uc_flush(struct net_device *dev);
4144 void dev_uc_init(struct net_device *dev);
4147 * __dev_uc_sync - Synchonize device's unicast list
4148 * @dev: device to sync
4149 * @sync: function to call if address should be added
4150 * @unsync: function to call if address should be removed
4152 * Add newly added addresses to the interface, and release
4153 * addresses that have been deleted.
4155 static inline int __dev_uc_sync(struct net_device *dev,
4156 int (*sync)(struct net_device *,
4157 const unsigned char *),
4158 int (*unsync)(struct net_device *,
4159 const unsigned char *))
4161 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4165 * __dev_uc_unsync - Remove synchronized addresses from device
4166 * @dev: device to sync
4167 * @unsync: function to call if address should be removed
4169 * Remove all addresses that were added to the device by dev_uc_sync().
4171 static inline void __dev_uc_unsync(struct net_device *dev,
4172 int (*unsync)(struct net_device *,
4173 const unsigned char *))
4175 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4178 /* Functions used for multicast addresses handling */
4179 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4180 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4181 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4182 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4183 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4184 int dev_mc_sync(struct net_device *to, struct net_device *from);
4185 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4186 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4187 void dev_mc_flush(struct net_device *dev);
4188 void dev_mc_init(struct net_device *dev);
4191 * __dev_mc_sync - Synchonize device's multicast list
4192 * @dev: device to sync
4193 * @sync: function to call if address should be added
4194 * @unsync: function to call if address should be removed
4196 * Add newly added addresses to the interface, and release
4197 * addresses that have been deleted.
4199 static inline int __dev_mc_sync(struct net_device *dev,
4200 int (*sync)(struct net_device *,
4201 const unsigned char *),
4202 int (*unsync)(struct net_device *,
4203 const unsigned char *))
4205 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4209 * __dev_mc_unsync - Remove synchronized addresses from device
4210 * @dev: device to sync
4211 * @unsync: function to call if address should be removed
4213 * Remove all addresses that were added to the device by dev_mc_sync().
4215 static inline void __dev_mc_unsync(struct net_device *dev,
4216 int (*unsync)(struct net_device *,
4217 const unsigned char *))
4219 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4222 /* Functions used for secondary unicast and multicast support */
4223 void dev_set_rx_mode(struct net_device *dev);
4224 void __dev_set_rx_mode(struct net_device *dev);
4225 int dev_set_promiscuity(struct net_device *dev, int inc);
4226 int dev_set_allmulti(struct net_device *dev, int inc);
4227 void netdev_state_change(struct net_device *dev);
4228 void netdev_notify_peers(struct net_device *dev);
4229 void netdev_features_change(struct net_device *dev);
4230 /* Load a device via the kmod */
4231 void dev_load(struct net *net, const char *name);
4232 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4233 struct rtnl_link_stats64 *storage);
4234 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4235 const struct net_device_stats *netdev_stats);
4237 extern int netdev_max_backlog;
4238 extern int netdev_tstamp_prequeue;
4239 extern int weight_p;
4240 extern int dev_weight_rx_bias;
4241 extern int dev_weight_tx_bias;
4242 extern int dev_rx_weight;
4243 extern int dev_tx_weight;
4244 extern int gro_normal_batch;
4246 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4247 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4248 struct list_head **iter);
4249 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4250 struct list_head **iter);
4252 /* iterate through upper list, must be called under RCU read lock */
4253 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4254 for (iter = &(dev)->adj_list.upper, \
4255 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4257 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4259 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4260 int (*fn)(struct net_device *upper_dev,
4264 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4265 struct net_device *upper_dev);
4267 bool netdev_has_any_upper_dev(struct net_device *dev);
4269 void *netdev_lower_get_next_private(struct net_device *dev,
4270 struct list_head **iter);
4271 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4272 struct list_head **iter);
4274 #define netdev_for_each_lower_private(dev, priv, iter) \
4275 for (iter = (dev)->adj_list.lower.next, \
4276 priv = netdev_lower_get_next_private(dev, &(iter)); \
4278 priv = netdev_lower_get_next_private(dev, &(iter)))
4280 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4281 for (iter = &(dev)->adj_list.lower, \
4282 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4284 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4286 void *netdev_lower_get_next(struct net_device *dev,
4287 struct list_head **iter);
4289 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4290 for (iter = (dev)->adj_list.lower.next, \
4291 ldev = netdev_lower_get_next(dev, &(iter)); \
4293 ldev = netdev_lower_get_next(dev, &(iter)))
4295 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4296 struct list_head **iter);
4297 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4298 struct list_head **iter);
4300 int netdev_walk_all_lower_dev(struct net_device *dev,
4301 int (*fn)(struct net_device *lower_dev,
4304 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4305 int (*fn)(struct net_device *lower_dev,
4309 void *netdev_adjacent_get_private(struct list_head *adj_list);
4310 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4311 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4312 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4313 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4314 struct netlink_ext_ack *extack);
4315 int netdev_master_upper_dev_link(struct net_device *dev,
4316 struct net_device *upper_dev,
4317 void *upper_priv, void *upper_info,
4318 struct netlink_ext_ack *extack);
4319 void netdev_upper_dev_unlink(struct net_device *dev,
4320 struct net_device *upper_dev);
4321 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4322 void *netdev_lower_dev_get_private(struct net_device *dev,
4323 struct net_device *lower_dev);
4324 void netdev_lower_state_changed(struct net_device *lower_dev,
4325 void *lower_state_info);
4327 /* RSS keys are 40 or 52 bytes long */
4328 #define NETDEV_RSS_KEY_LEN 52
4329 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4330 void netdev_rss_key_fill(void *buffer, size_t len);
4332 int dev_get_nest_level(struct net_device *dev);
4333 int skb_checksum_help(struct sk_buff *skb);
4334 int skb_crc32c_csum_help(struct sk_buff *skb);
4335 int skb_csum_hwoffload_help(struct sk_buff *skb,
4336 const netdev_features_t features);
4338 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4339 netdev_features_t features, bool tx_path);
4340 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4341 netdev_features_t features);
4343 struct netdev_bonding_info {
4348 struct netdev_notifier_bonding_info {
4349 struct netdev_notifier_info info; /* must be first */
4350 struct netdev_bonding_info bonding_info;
4353 void netdev_bonding_info_change(struct net_device *dev,
4354 struct netdev_bonding_info *bonding_info);
4357 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4359 return __skb_gso_segment(skb, features, true);
4361 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4363 static inline bool can_checksum_protocol(netdev_features_t features,
4366 if (protocol == htons(ETH_P_FCOE))
4367 return !!(features & NETIF_F_FCOE_CRC);
4369 /* Assume this is an IP checksum (not SCTP CRC) */
4371 if (features & NETIF_F_HW_CSUM) {
4372 /* Can checksum everything */
4377 case htons(ETH_P_IP):
4378 return !!(features & NETIF_F_IP_CSUM);
4379 case htons(ETH_P_IPV6):
4380 return !!(features & NETIF_F_IPV6_CSUM);
4387 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4389 static inline void netdev_rx_csum_fault(struct net_device *dev,
4390 struct sk_buff *skb)
4394 /* rx skb timestamps */
4395 void net_enable_timestamp(void);
4396 void net_disable_timestamp(void);
4398 #ifdef CONFIG_PROC_FS
4399 int __init dev_proc_init(void);
4401 #define dev_proc_init() 0
4404 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4405 struct sk_buff *skb, struct net_device *dev,
4408 __this_cpu_write(softnet_data.xmit.more, more);
4409 return ops->ndo_start_xmit(skb, dev);
4412 static inline bool netdev_xmit_more(void)
4414 return __this_cpu_read(softnet_data.xmit.more);
4417 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4418 struct netdev_queue *txq, bool more)
4420 const struct net_device_ops *ops = dev->netdev_ops;
4423 rc = __netdev_start_xmit(ops, skb, dev, more);
4424 if (rc == NETDEV_TX_OK)
4425 txq_trans_update(txq);
4430 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4432 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4435 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4437 return netdev_class_create_file_ns(class_attr, NULL);
4440 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4442 netdev_class_remove_file_ns(class_attr, NULL);
4445 extern const struct kobj_ns_type_operations net_ns_type_operations;
4447 const char *netdev_drivername(const struct net_device *dev);
4449 void linkwatch_run_queue(void);
4451 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4452 netdev_features_t f2)
4454 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4455 if (f1 & NETIF_F_HW_CSUM)
4456 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4458 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4464 static inline netdev_features_t netdev_get_wanted_features(
4465 struct net_device *dev)
4467 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4469 netdev_features_t netdev_increment_features(netdev_features_t all,
4470 netdev_features_t one, netdev_features_t mask);
4472 /* Allow TSO being used on stacked device :
4473 * Performing the GSO segmentation before last device
4474 * is a performance improvement.
4476 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4477 netdev_features_t mask)
4479 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4482 int __netdev_update_features(struct net_device *dev);
4483 void netdev_update_features(struct net_device *dev);
4484 void netdev_change_features(struct net_device *dev);
4486 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4487 struct net_device *dev);
4489 netdev_features_t passthru_features_check(struct sk_buff *skb,
4490 struct net_device *dev,
4491 netdev_features_t features);
4492 netdev_features_t netif_skb_features(struct sk_buff *skb);
4494 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4496 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4498 /* check flags correspondence */
4499 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4500 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4501 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4502 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4503 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4504 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4505 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4506 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4507 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4508 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4509 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4510 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4511 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4512 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4513 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4514 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4515 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4516 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4518 return (features & feature) == feature;
4521 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4523 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4524 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4527 static inline bool netif_needs_gso(struct sk_buff *skb,
4528 netdev_features_t features)
4530 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4531 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4532 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4535 static inline void netif_set_gso_max_size(struct net_device *dev,
4538 dev->gso_max_size = size;
4541 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4542 int pulled_hlen, u16 mac_offset,
4545 skb->protocol = protocol;
4546 skb->encapsulation = 1;
4547 skb_push(skb, pulled_hlen);
4548 skb_reset_transport_header(skb);
4549 skb->mac_header = mac_offset;
4550 skb->network_header = skb->mac_header + mac_len;
4551 skb->mac_len = mac_len;
4554 static inline bool netif_is_macsec(const struct net_device *dev)
4556 return dev->priv_flags & IFF_MACSEC;
4559 static inline bool netif_is_macvlan(const struct net_device *dev)
4561 return dev->priv_flags & IFF_MACVLAN;
4564 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4566 return dev->priv_flags & IFF_MACVLAN_PORT;
4569 static inline bool netif_is_bond_master(const struct net_device *dev)
4571 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4574 static inline bool netif_is_bond_slave(const struct net_device *dev)
4576 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4579 static inline bool netif_supports_nofcs(struct net_device *dev)
4581 return dev->priv_flags & IFF_SUPP_NOFCS;
4584 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4586 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4589 static inline bool netif_is_l3_master(const struct net_device *dev)
4591 return dev->priv_flags & IFF_L3MDEV_MASTER;
4594 static inline bool netif_is_l3_slave(const struct net_device *dev)
4596 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4599 static inline bool netif_is_bridge_master(const struct net_device *dev)
4601 return dev->priv_flags & IFF_EBRIDGE;
4604 static inline bool netif_is_bridge_port(const struct net_device *dev)
4606 return dev->priv_flags & IFF_BRIDGE_PORT;
4609 static inline bool netif_is_ovs_master(const struct net_device *dev)
4611 return dev->priv_flags & IFF_OPENVSWITCH;
4614 static inline bool netif_is_ovs_port(const struct net_device *dev)
4616 return dev->priv_flags & IFF_OVS_DATAPATH;
4619 static inline bool netif_is_team_master(const struct net_device *dev)
4621 return dev->priv_flags & IFF_TEAM;
4624 static inline bool netif_is_team_port(const struct net_device *dev)
4626 return dev->priv_flags & IFF_TEAM_PORT;
4629 static inline bool netif_is_lag_master(const struct net_device *dev)
4631 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4634 static inline bool netif_is_lag_port(const struct net_device *dev)
4636 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4639 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4641 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4644 static inline bool netif_is_failover(const struct net_device *dev)
4646 return dev->priv_flags & IFF_FAILOVER;
4649 static inline bool netif_is_failover_slave(const struct net_device *dev)
4651 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4654 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4655 static inline void netif_keep_dst(struct net_device *dev)
4657 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4660 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4661 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4663 /* TODO: reserve and use an additional IFF bit, if we get more users */
4664 return dev->priv_flags & IFF_MACSEC;
4667 extern struct pernet_operations __net_initdata loopback_net_ops;
4669 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4671 /* netdev_printk helpers, similar to dev_printk */
4673 static inline const char *netdev_name(const struct net_device *dev)
4675 if (!dev->name[0] || strchr(dev->name, '%'))
4676 return "(unnamed net_device)";
4680 static inline bool netdev_unregistering(const struct net_device *dev)
4682 return dev->reg_state == NETREG_UNREGISTERING;
4685 static inline const char *netdev_reg_state(const struct net_device *dev)
4687 switch (dev->reg_state) {
4688 case NETREG_UNINITIALIZED: return " (uninitialized)";
4689 case NETREG_REGISTERED: return "";
4690 case NETREG_UNREGISTERING: return " (unregistering)";
4691 case NETREG_UNREGISTERED: return " (unregistered)";
4692 case NETREG_RELEASED: return " (released)";
4693 case NETREG_DUMMY: return " (dummy)";
4696 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4697 return " (unknown)";
4700 __printf(3, 4) __cold
4701 void netdev_printk(const char *level, const struct net_device *dev,
4702 const char *format, ...);
4703 __printf(2, 3) __cold
4704 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4705 __printf(2, 3) __cold
4706 void netdev_alert(const struct net_device *dev, const char *format, ...);
4707 __printf(2, 3) __cold
4708 void netdev_crit(const struct net_device *dev, const char *format, ...);
4709 __printf(2, 3) __cold
4710 void netdev_err(const struct net_device *dev, const char *format, ...);
4711 __printf(2, 3) __cold
4712 void netdev_warn(const struct net_device *dev, const char *format, ...);
4713 __printf(2, 3) __cold
4714 void netdev_notice(const struct net_device *dev, const char *format, ...);
4715 __printf(2, 3) __cold
4716 void netdev_info(const struct net_device *dev, const char *format, ...);
4718 #define netdev_level_once(level, dev, fmt, ...) \
4720 static bool __print_once __read_mostly; \
4722 if (!__print_once) { \
4723 __print_once = true; \
4724 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4728 #define netdev_emerg_once(dev, fmt, ...) \
4729 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4730 #define netdev_alert_once(dev, fmt, ...) \
4731 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4732 #define netdev_crit_once(dev, fmt, ...) \
4733 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4734 #define netdev_err_once(dev, fmt, ...) \
4735 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4736 #define netdev_warn_once(dev, fmt, ...) \
4737 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4738 #define netdev_notice_once(dev, fmt, ...) \
4739 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4740 #define netdev_info_once(dev, fmt, ...) \
4741 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4743 #define MODULE_ALIAS_NETDEV(device) \
4744 MODULE_ALIAS("netdev-" device)
4746 #if defined(CONFIG_DYNAMIC_DEBUG)
4747 #define netdev_dbg(__dev, format, args...) \
4749 dynamic_netdev_dbg(__dev, format, ##args); \
4751 #elif defined(DEBUG)
4752 #define netdev_dbg(__dev, format, args...) \
4753 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4755 #define netdev_dbg(__dev, format, args...) \
4758 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4762 #if defined(VERBOSE_DEBUG)
4763 #define netdev_vdbg netdev_dbg
4766 #define netdev_vdbg(dev, format, args...) \
4769 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4775 * netdev_WARN() acts like dev_printk(), but with the key difference
4776 * of using a WARN/WARN_ON to get the message out, including the
4777 * file/line information and a backtrace.
4779 #define netdev_WARN(dev, format, args...) \
4780 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4781 netdev_reg_state(dev), ##args)
4783 #define netdev_WARN_ONCE(dev, format, args...) \
4784 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4785 netdev_reg_state(dev), ##args)
4787 /* netif printk helpers, similar to netdev_printk */
4789 #define netif_printk(priv, type, level, dev, fmt, args...) \
4791 if (netif_msg_##type(priv)) \
4792 netdev_printk(level, (dev), fmt, ##args); \
4795 #define netif_level(level, priv, type, dev, fmt, args...) \
4797 if (netif_msg_##type(priv)) \
4798 netdev_##level(dev, fmt, ##args); \
4801 #define netif_emerg(priv, type, dev, fmt, args...) \
4802 netif_level(emerg, priv, type, dev, fmt, ##args)
4803 #define netif_alert(priv, type, dev, fmt, args...) \
4804 netif_level(alert, priv, type, dev, fmt, ##args)
4805 #define netif_crit(priv, type, dev, fmt, args...) \
4806 netif_level(crit, priv, type, dev, fmt, ##args)
4807 #define netif_err(priv, type, dev, fmt, args...) \
4808 netif_level(err, priv, type, dev, fmt, ##args)
4809 #define netif_warn(priv, type, dev, fmt, args...) \
4810 netif_level(warn, priv, type, dev, fmt, ##args)
4811 #define netif_notice(priv, type, dev, fmt, args...) \
4812 netif_level(notice, priv, type, dev, fmt, ##args)
4813 #define netif_info(priv, type, dev, fmt, args...) \
4814 netif_level(info, priv, type, dev, fmt, ##args)
4816 #if defined(CONFIG_DYNAMIC_DEBUG)
4817 #define netif_dbg(priv, type, netdev, format, args...) \
4819 if (netif_msg_##type(priv)) \
4820 dynamic_netdev_dbg(netdev, format, ##args); \
4822 #elif defined(DEBUG)
4823 #define netif_dbg(priv, type, dev, format, args...) \
4824 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4826 #define netif_dbg(priv, type, dev, format, args...) \
4829 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4834 /* if @cond then downgrade to debug, else print at @level */
4835 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4838 netif_dbg(priv, type, netdev, fmt, ##args); \
4840 netif_ ## level(priv, type, netdev, fmt, ##args); \
4843 #if defined(VERBOSE_DEBUG)
4844 #define netif_vdbg netif_dbg
4846 #define netif_vdbg(priv, type, dev, format, args...) \
4849 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4855 * The list of packet types we will receive (as opposed to discard)
4856 * and the routines to invoke.
4858 * Why 16. Because with 16 the only overlap we get on a hash of the
4859 * low nibble of the protocol value is RARP/SNAP/X.25.
4873 #define PTYPE_HASH_SIZE (16)
4874 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4876 extern struct net_device *blackhole_netdev;
4878 #endif /* _LINUX_NETDEVICE_H */