1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Definitions for the Interfaces handler.
9 * Version: @(#)dev.h 1.0.10 08/12/93
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Corey Minyard <wf-rch!minyard@relay.EU.net>
14 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
15 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
16 * Bjorn Ekwall. <bj0rn@blox.se>
17 * Pekka Riikonen <priikone@poseidon.pspt.fi>
19 * Moved to /usr/include/linux for NET3
21 #ifndef _LINUX_NETDEVICE_H
22 #define _LINUX_NETDEVICE_H
24 #include <linux/timer.h>
25 #include <linux/bug.h>
26 #include <linux/delay.h>
27 #include <linux/atomic.h>
28 #include <linux/prefetch.h>
29 #include <asm/cache.h>
30 #include <asm/byteorder.h>
32 #include <linux/percpu.h>
33 #include <linux/rculist.h>
34 #include <linux/workqueue.h>
35 #include <linux/dynamic_queue_limits.h>
37 #include <linux/ethtool.h>
38 #include <net/net_namespace.h>
40 #include <net/dcbnl.h>
42 #include <net/netprio_cgroup.h>
45 #include <linux/netdev_features.h>
46 #include <linux/neighbour.h>
47 #include <uapi/linux/netdevice.h>
48 #include <uapi/linux/if_bonding.h>
49 #include <uapi/linux/pkt_cls.h>
50 #include <linux/hashtable.h>
60 /* 802.15.4 specific */
63 /* UDP Tunnel offloads */
64 struct udp_tunnel_info;
68 void netdev_set_default_ethtool_ops(struct net_device *dev,
69 const struct ethtool_ops *ops);
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
76 * Transmit return codes: transmit return codes originate from three different
79 * - qdisc return codes
80 * - driver transmit return codes
83 * Drivers are allowed to return any one of those in their hard_start_xmit()
84 * function. Real network devices commonly used with qdiscs should only return
85 * the driver transmit return codes though - when qdiscs are used, the actual
86 * transmission happens asynchronously, so the value is not propagated to
87 * higher layers. Virtual network devices transmit synchronously; in this case
88 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
89 * others are propagated to higher layers.
92 /* qdisc ->enqueue() return codes. */
93 #define NET_XMIT_SUCCESS 0x00
94 #define NET_XMIT_DROP 0x01 /* skb dropped */
95 #define NET_XMIT_CN 0x02 /* congestion notification */
96 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
98 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
99 * indicates that the device will soon be dropping packets, or already drops
100 * some packets of the same priority; prompting us to send less aggressively. */
101 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
102 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
104 /* Driver transmit return codes */
105 #define NETDEV_TX_MASK 0xf0
108 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
109 NETDEV_TX_OK = 0x00, /* driver took care of packet */
110 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
112 typedef enum netdev_tx netdev_tx_t;
115 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
116 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
118 static inline bool dev_xmit_complete(int rc)
121 * Positive cases with an skb consumed by a driver:
122 * - successful transmission (rc == NETDEV_TX_OK)
123 * - error while transmitting (rc < 0)
124 * - error while queueing to a different device (rc & NET_XMIT_MASK)
126 if (likely(rc < NET_XMIT_MASK))
133 * Compute the worst-case header length according to the protocols
137 #if defined(CONFIG_HYPERV_NET)
138 # define LL_MAX_HEADER 128
139 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
140 # if defined(CONFIG_MAC80211_MESH)
141 # define LL_MAX_HEADER 128
143 # define LL_MAX_HEADER 96
146 # define LL_MAX_HEADER 32
149 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
150 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
151 #define MAX_HEADER LL_MAX_HEADER
153 #define MAX_HEADER (LL_MAX_HEADER + 48)
157 * Old network device statistics. Fields are native words
158 * (unsigned long) so they can be read and written atomically.
161 struct net_device_stats {
162 unsigned long rx_packets;
163 unsigned long tx_packets;
164 unsigned long rx_bytes;
165 unsigned long tx_bytes;
166 unsigned long rx_errors;
167 unsigned long tx_errors;
168 unsigned long rx_dropped;
169 unsigned long tx_dropped;
170 unsigned long multicast;
171 unsigned long collisions;
172 unsigned long rx_length_errors;
173 unsigned long rx_over_errors;
174 unsigned long rx_crc_errors;
175 unsigned long rx_frame_errors;
176 unsigned long rx_fifo_errors;
177 unsigned long rx_missed_errors;
178 unsigned long tx_aborted_errors;
179 unsigned long tx_carrier_errors;
180 unsigned long tx_fifo_errors;
181 unsigned long tx_heartbeat_errors;
182 unsigned long tx_window_errors;
183 unsigned long rx_compressed;
184 unsigned long tx_compressed;
188 #include <linux/cache.h>
189 #include <linux/skbuff.h>
192 #include <linux/static_key.h>
193 extern struct static_key_false rps_needed;
194 extern struct static_key_false rfs_needed;
201 struct netdev_hw_addr {
202 struct list_head list;
203 unsigned char addr[MAX_ADDR_LEN];
205 #define NETDEV_HW_ADDR_T_LAN 1
206 #define NETDEV_HW_ADDR_T_SAN 2
207 #define NETDEV_HW_ADDR_T_SLAVE 3
208 #define NETDEV_HW_ADDR_T_UNICAST 4
209 #define NETDEV_HW_ADDR_T_MULTICAST 5
214 struct rcu_head rcu_head;
217 struct netdev_hw_addr_list {
218 struct list_head list;
222 #define netdev_hw_addr_list_count(l) ((l)->count)
223 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
224 #define netdev_hw_addr_list_for_each(ha, l) \
225 list_for_each_entry(ha, &(l)->list, list)
227 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
228 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
229 #define netdev_for_each_uc_addr(ha, dev) \
230 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
232 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
233 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
234 #define netdev_for_each_mc_addr(ha, dev) \
235 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
241 /* cached hardware header; allow for machine alignment needs. */
242 #define HH_DATA_MOD 16
243 #define HH_DATA_OFF(__len) \
244 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
245 #define HH_DATA_ALIGN(__len) \
246 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
247 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
250 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
252 * dev->hard_header_len ? (dev->hard_header_len +
253 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
255 * We could use other alignment values, but we must maintain the
256 * relationship HH alignment <= LL alignment.
258 #define LL_RESERVED_SPACE(dev) \
259 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
260 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 int (*create) (struct sk_buff *skb, struct net_device *dev,
265 unsigned short type, const void *daddr,
266 const void *saddr, unsigned int len);
267 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
268 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
269 void (*cache_update)(struct hh_cache *hh,
270 const struct net_device *dev,
271 const unsigned char *haddr);
272 bool (*validate)(const char *ll_header, unsigned int len);
273 __be16 (*parse_protocol)(const struct sk_buff *skb);
276 /* These flag bits are private to the generic network queueing
277 * layer; they may not be explicitly referenced by any other
281 enum netdev_state_t {
283 __LINK_STATE_PRESENT,
284 __LINK_STATE_NOCARRIER,
285 __LINK_STATE_LINKWATCH_PENDING,
286 __LINK_STATE_DORMANT,
291 * This structure holds boot-time configured netdevice settings. They
292 * are then used in the device probing.
294 struct netdev_boot_setup {
298 #define NETDEV_BOOT_SETUP_MAX 8
300 int __init netdev_boot_setup(char *str);
303 struct list_head list;
308 * size of gro hash buckets, must less than bit number of
309 * napi_struct::gro_bitmask
311 #define GRO_HASH_BUCKETS 8
314 * Structure for NAPI scheduling similar to tasklet but with weighting
317 /* The poll_list must only be managed by the entity which
318 * changes the state of the NAPI_STATE_SCHED bit. This means
319 * whoever atomically sets that bit can add this napi_struct
320 * to the per-CPU poll_list, and whoever clears that bit
321 * can remove from the list right before clearing the bit.
323 struct list_head poll_list;
327 unsigned long gro_bitmask;
328 int (*poll)(struct napi_struct *, int);
329 #ifdef CONFIG_NETPOLL
332 struct net_device *dev;
333 struct gro_list gro_hash[GRO_HASH_BUCKETS];
335 struct list_head rx_list; /* Pending GRO_NORMAL skbs */
336 int rx_count; /* length of rx_list */
337 struct hrtimer timer;
338 struct list_head dev_list;
339 struct hlist_node napi_hash_node;
340 unsigned int napi_id;
344 NAPI_STATE_SCHED, /* Poll is scheduled */
345 NAPI_STATE_MISSED, /* reschedule a napi */
346 NAPI_STATE_DISABLE, /* Disable pending */
347 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
348 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
349 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
350 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
354 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
355 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
356 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
357 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
358 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
359 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
360 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
371 typedef enum gro_result gro_result_t;
374 * enum rx_handler_result - Possible return values for rx_handlers.
375 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
377 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
378 * case skb->dev was changed by rx_handler.
379 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
380 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
382 * rx_handlers are functions called from inside __netif_receive_skb(), to do
383 * special processing of the skb, prior to delivery to protocol handlers.
385 * Currently, a net_device can only have a single rx_handler registered. Trying
386 * to register a second rx_handler will return -EBUSY.
388 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
389 * To unregister a rx_handler on a net_device, use
390 * netdev_rx_handler_unregister().
392 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
395 * If the rx_handler consumed the skb in some way, it should return
396 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
397 * the skb to be delivered in some other way.
399 * If the rx_handler changed skb->dev, to divert the skb to another
400 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
401 * new device will be called if it exists.
403 * If the rx_handler decides the skb should be ignored, it should return
404 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
405 * are registered on exact device (ptype->dev == skb->dev).
407 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
408 * delivered, it should return RX_HANDLER_PASS.
410 * A device without a registered rx_handler will behave as if rx_handler
411 * returned RX_HANDLER_PASS.
414 enum rx_handler_result {
420 typedef enum rx_handler_result rx_handler_result_t;
421 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
423 void __napi_schedule(struct napi_struct *n);
424 void __napi_schedule_irqoff(struct napi_struct *n);
426 static inline bool napi_disable_pending(struct napi_struct *n)
428 return test_bit(NAPI_STATE_DISABLE, &n->state);
431 bool napi_schedule_prep(struct napi_struct *n);
434 * napi_schedule - schedule NAPI poll
437 * Schedule NAPI poll routine to be called if it is not already
440 static inline void napi_schedule(struct napi_struct *n)
442 if (napi_schedule_prep(n))
447 * napi_schedule_irqoff - schedule NAPI poll
450 * Variant of napi_schedule(), assuming hard irqs are masked.
452 static inline void napi_schedule_irqoff(struct napi_struct *n)
454 if (napi_schedule_prep(n))
455 __napi_schedule_irqoff(n);
458 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
459 static inline bool napi_reschedule(struct napi_struct *napi)
461 if (napi_schedule_prep(napi)) {
462 __napi_schedule(napi);
468 bool napi_complete_done(struct napi_struct *n, int work_done);
470 * napi_complete - NAPI processing complete
473 * Mark NAPI processing as complete.
474 * Consider using napi_complete_done() instead.
475 * Return false if device should avoid rearming interrupts.
477 static inline bool napi_complete(struct napi_struct *n)
479 return napi_complete_done(n, 0);
483 * napi_hash_del - remove a NAPI from global table
484 * @napi: NAPI context
486 * Warning: caller must observe RCU grace period
487 * before freeing memory containing @napi, if
488 * this function returns true.
489 * Note: core networking stack automatically calls it
490 * from netif_napi_del().
491 * Drivers might want to call this helper to combine all
492 * the needed RCU grace periods into a single one.
494 bool napi_hash_del(struct napi_struct *napi);
497 * napi_disable - prevent NAPI from scheduling
500 * Stop NAPI from being scheduled on this context.
501 * Waits till any outstanding processing completes.
503 void napi_disable(struct napi_struct *n);
506 * napi_enable - enable NAPI scheduling
509 * Resume NAPI from being scheduled on this context.
510 * Must be paired with napi_disable.
512 static inline void napi_enable(struct napi_struct *n)
514 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
515 smp_mb__before_atomic();
516 clear_bit(NAPI_STATE_SCHED, &n->state);
517 clear_bit(NAPI_STATE_NPSVC, &n->state);
521 * napi_synchronize - wait until NAPI is not running
524 * Wait until NAPI is done being scheduled on this context.
525 * Waits till any outstanding processing completes but
526 * does not disable future activations.
528 static inline void napi_synchronize(const struct napi_struct *n)
530 if (IS_ENABLED(CONFIG_SMP))
531 while (test_bit(NAPI_STATE_SCHED, &n->state))
538 * napi_if_scheduled_mark_missed - if napi is running, set the
542 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
545 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
547 unsigned long val, new;
550 val = READ_ONCE(n->state);
551 if (val & NAPIF_STATE_DISABLE)
554 if (!(val & NAPIF_STATE_SCHED))
557 new = val | NAPIF_STATE_MISSED;
558 } while (cmpxchg(&n->state, val, new) != val);
563 enum netdev_queue_state_t {
564 __QUEUE_STATE_DRV_XOFF,
565 __QUEUE_STATE_STACK_XOFF,
566 __QUEUE_STATE_FROZEN,
569 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
570 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
571 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
573 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
574 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
576 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
580 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
581 * netif_tx_* functions below are used to manipulate this flag. The
582 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
583 * queue independently. The netif_xmit_*stopped functions below are called
584 * to check if the queue has been stopped by the driver or stack (either
585 * of the XOFF bits are set in the state). Drivers should not need to call
586 * netif_xmit*stopped functions, they should only be using netif_tx_*.
589 struct netdev_queue {
593 struct net_device *dev;
594 struct Qdisc __rcu *qdisc;
595 struct Qdisc *qdisc_sleeping;
599 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
602 unsigned long tx_maxrate;
604 * Number of TX timeouts for this queue
605 * (/sys/class/net/DEV/Q/trans_timeout)
607 unsigned long trans_timeout;
609 /* Subordinate device that the queue has been assigned to */
610 struct net_device *sb_dev;
611 #ifdef CONFIG_XDP_SOCKETS
612 struct xdp_umem *umem;
617 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
620 * Time (in jiffies) of last Tx
622 unsigned long trans_start;
629 } ____cacheline_aligned_in_smp;
631 extern int sysctl_fb_tunnels_only_for_init_net;
632 extern int sysctl_devconf_inherit_init_net;
634 static inline bool net_has_fallback_tunnels(const struct net *net)
636 return net == &init_net ||
637 !IS_ENABLED(CONFIG_SYSCTL) ||
638 !sysctl_fb_tunnels_only_for_init_net;
641 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
643 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
650 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
652 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
659 * This structure holds an RPS map which can be of variable length. The
660 * map is an array of CPUs.
667 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
670 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
671 * tail pointer for that CPU's input queue at the time of last enqueue, and
672 * a hardware filter index.
674 struct rps_dev_flow {
677 unsigned int last_qtail;
679 #define RPS_NO_FILTER 0xffff
682 * The rps_dev_flow_table structure contains a table of flow mappings.
684 struct rps_dev_flow_table {
687 struct rps_dev_flow flows[0];
689 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
690 ((_num) * sizeof(struct rps_dev_flow)))
693 * The rps_sock_flow_table contains mappings of flows to the last CPU
694 * on which they were processed by the application (set in recvmsg).
695 * Each entry is a 32bit value. Upper part is the high-order bits
696 * of flow hash, lower part is CPU number.
697 * rps_cpu_mask is used to partition the space, depending on number of
698 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
699 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
700 * meaning we use 32-6=26 bits for the hash.
702 struct rps_sock_flow_table {
705 u32 ents[0] ____cacheline_aligned_in_smp;
707 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
709 #define RPS_NO_CPU 0xffff
711 extern u32 rps_cpu_mask;
712 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
714 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
718 unsigned int index = hash & table->mask;
719 u32 val = hash & ~rps_cpu_mask;
721 /* We only give a hint, preemption can change CPU under us */
722 val |= raw_smp_processor_id();
724 if (table->ents[index] != val)
725 table->ents[index] = val;
729 #ifdef CONFIG_RFS_ACCEL
730 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
733 #endif /* CONFIG_RPS */
735 /* This structure contains an instance of an RX queue. */
736 struct netdev_rx_queue {
738 struct rps_map __rcu *rps_map;
739 struct rps_dev_flow_table __rcu *rps_flow_table;
742 struct net_device *dev;
743 struct xdp_rxq_info xdp_rxq;
744 #ifdef CONFIG_XDP_SOCKETS
745 struct xdp_umem *umem;
747 } ____cacheline_aligned_in_smp;
750 * RX queue sysfs structures and functions.
752 struct rx_queue_attribute {
753 struct attribute attr;
754 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
755 ssize_t (*store)(struct netdev_rx_queue *queue,
756 const char *buf, size_t len);
761 * This structure holds an XPS map which can be of variable length. The
762 * map is an array of queues.
766 unsigned int alloc_len;
770 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
771 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
772 - sizeof(struct xps_map)) / sizeof(u16))
775 * This structure holds all XPS maps for device. Maps are indexed by CPU.
777 struct xps_dev_maps {
779 struct xps_map __rcu *attr_map[0]; /* Either CPUs map or RXQs map */
782 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
783 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
785 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
786 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
788 #endif /* CONFIG_XPS */
790 #define TC_MAX_QUEUE 16
791 #define TC_BITMASK 15
792 /* HW offloaded queuing disciplines txq count and offset maps */
793 struct netdev_tc_txq {
798 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
800 * This structure is to hold information about the device
801 * configured to run FCoE protocol stack.
803 struct netdev_fcoe_hbainfo {
804 char manufacturer[64];
805 char serial_number[64];
806 char hardware_version[64];
807 char driver_version[64];
808 char optionrom_version[64];
809 char firmware_version[64];
811 char model_description[256];
815 #define MAX_PHYS_ITEM_ID_LEN 32
817 /* This structure holds a unique identifier to identify some
818 * physical item (port for example) used by a netdevice.
820 struct netdev_phys_item_id {
821 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
822 unsigned char id_len;
825 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
826 struct netdev_phys_item_id *b)
828 return a->id_len == b->id_len &&
829 memcmp(a->id, b->id, a->id_len) == 0;
832 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
834 struct net_device *sb_dev);
837 TC_SETUP_QDISC_MQPRIO,
840 TC_SETUP_CLSMATCHALL,
850 TC_SETUP_QDISC_TAPRIO,
855 /* These structures hold the attributes of bpf state that are being passed
856 * to the netdevice through the bpf op.
858 enum bpf_netdev_command {
859 /* Set or clear a bpf program used in the earliest stages of packet
860 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
861 * is responsible for calling bpf_prog_put on any old progs that are
862 * stored. In case of error, the callee need not release the new prog
863 * reference, but on success it takes ownership and must bpf_prog_put
864 * when it is no longer used.
870 /* BPF program for offload callbacks, invoked at program load time. */
871 BPF_OFFLOAD_MAP_ALLOC,
872 BPF_OFFLOAD_MAP_FREE,
876 struct bpf_prog_offload_ops;
877 struct netlink_ext_ack;
881 enum bpf_netdev_command command;
886 struct bpf_prog *prog;
887 struct netlink_ext_ack *extack;
889 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
892 /* flags with which program was installed */
895 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
897 struct bpf_offloaded_map *offmap;
899 /* XDP_SETUP_XSK_UMEM */
901 struct xdp_umem *umem;
907 /* Flags for ndo_xsk_wakeup. */
908 #define XDP_WAKEUP_RX (1 << 0)
909 #define XDP_WAKEUP_TX (1 << 1)
911 #ifdef CONFIG_XFRM_OFFLOAD
913 int (*xdo_dev_state_add) (struct xfrm_state *x);
914 void (*xdo_dev_state_delete) (struct xfrm_state *x);
915 void (*xdo_dev_state_free) (struct xfrm_state *x);
916 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
917 struct xfrm_state *x);
918 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
923 struct rcu_head rcuhead;
930 struct netdev_name_node {
931 struct hlist_node hlist;
932 struct list_head list;
933 struct net_device *dev;
937 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
938 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
941 * This structure defines the management hooks for network devices.
942 * The following hooks can be defined; unless noted otherwise, they are
943 * optional and can be filled with a null pointer.
945 * int (*ndo_init)(struct net_device *dev);
946 * This function is called once when a network device is registered.
947 * The network device can use this for any late stage initialization
948 * or semantic validation. It can fail with an error code which will
949 * be propagated back to register_netdev.
951 * void (*ndo_uninit)(struct net_device *dev);
952 * This function is called when device is unregistered or when registration
953 * fails. It is not called if init fails.
955 * int (*ndo_open)(struct net_device *dev);
956 * This function is called when a network device transitions to the up
959 * int (*ndo_stop)(struct net_device *dev);
960 * This function is called when a network device transitions to the down
963 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
964 * struct net_device *dev);
965 * Called when a packet needs to be transmitted.
966 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
967 * the queue before that can happen; it's for obsolete devices and weird
968 * corner cases, but the stack really does a non-trivial amount
969 * of useless work if you return NETDEV_TX_BUSY.
970 * Required; cannot be NULL.
972 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
973 * struct net_device *dev
974 * netdev_features_t features);
975 * Called by core transmit path to determine if device is capable of
976 * performing offload operations on a given packet. This is to give
977 * the device an opportunity to implement any restrictions that cannot
978 * be otherwise expressed by feature flags. The check is called with
979 * the set of features that the stack has calculated and it returns
980 * those the driver believes to be appropriate.
982 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
983 * struct net_device *sb_dev);
984 * Called to decide which queue to use when device supports multiple
987 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
988 * This function is called to allow device receiver to make
989 * changes to configuration when multicast or promiscuous is enabled.
991 * void (*ndo_set_rx_mode)(struct net_device *dev);
992 * This function is called device changes address list filtering.
993 * If driver handles unicast address filtering, it should set
994 * IFF_UNICAST_FLT in its priv_flags.
996 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
997 * This function is called when the Media Access Control address
998 * needs to be changed. If this interface is not defined, the
999 * MAC address can not be changed.
1001 * int (*ndo_validate_addr)(struct net_device *dev);
1002 * Test if Media Access Control address is valid for the device.
1004 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1005 * Called when a user requests an ioctl which can't be handled by
1006 * the generic interface code. If not defined ioctls return
1007 * not supported error code.
1009 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1010 * Used to set network devices bus interface parameters. This interface
1011 * is retained for legacy reasons; new devices should use the bus
1012 * interface (PCI) for low level management.
1014 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1015 * Called when a user wants to change the Maximum Transfer Unit
1018 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
1019 * Callback used when the transmitter has not made any progress
1020 * for dev->watchdog ticks.
1022 * void (*ndo_get_stats64)(struct net_device *dev,
1023 * struct rtnl_link_stats64 *storage);
1024 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1025 * Called when a user wants to get the network device usage
1026 * statistics. Drivers must do one of the following:
1027 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1028 * rtnl_link_stats64 structure passed by the caller.
1029 * 2. Define @ndo_get_stats to update a net_device_stats structure
1030 * (which should normally be dev->stats) and return a pointer to
1031 * it. The structure may be changed asynchronously only if each
1032 * field is written atomically.
1033 * 3. Update dev->stats asynchronously and atomically, and define
1034 * neither operation.
1036 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1037 * Return true if this device supports offload stats of this attr_id.
1039 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1041 * Get statistics for offload operations by attr_id. Write it into the
1042 * attr_data pointer.
1044 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1045 * If device supports VLAN filtering this function is called when a
1046 * VLAN id is registered.
1048 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1049 * If device supports VLAN filtering this function is called when a
1050 * VLAN id is unregistered.
1052 * void (*ndo_poll_controller)(struct net_device *dev);
1054 * SR-IOV management functions.
1055 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1056 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1057 * u8 qos, __be16 proto);
1058 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1060 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1061 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1062 * int (*ndo_get_vf_config)(struct net_device *dev,
1063 * int vf, struct ifla_vf_info *ivf);
1064 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1065 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1066 * struct nlattr *port[]);
1068 * Enable or disable the VF ability to query its RSS Redirection Table and
1069 * Hash Key. This is needed since on some devices VF share this information
1070 * with PF and querying it may introduce a theoretical security risk.
1071 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1072 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1073 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1075 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1076 * This is always called from the stack with the rtnl lock held and netif
1077 * tx queues stopped. This allows the netdevice to perform queue
1078 * management safely.
1080 * Fiber Channel over Ethernet (FCoE) offload functions.
1081 * int (*ndo_fcoe_enable)(struct net_device *dev);
1082 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1083 * so the underlying device can perform whatever needed configuration or
1084 * initialization to support acceleration of FCoE traffic.
1086 * int (*ndo_fcoe_disable)(struct net_device *dev);
1087 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1088 * so the underlying device can perform whatever needed clean-ups to
1089 * stop supporting acceleration of FCoE traffic.
1091 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1092 * struct scatterlist *sgl, unsigned int sgc);
1093 * Called when the FCoE Initiator wants to initialize an I/O that
1094 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1095 * perform necessary setup and returns 1 to indicate the device is set up
1096 * successfully to perform DDP on this I/O, otherwise this returns 0.
1098 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1099 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1100 * indicated by the FC exchange id 'xid', so the underlying device can
1101 * clean up and reuse resources for later DDP requests.
1103 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1104 * struct scatterlist *sgl, unsigned int sgc);
1105 * Called when the FCoE Target wants to initialize an I/O that
1106 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1107 * perform necessary setup and returns 1 to indicate the device is set up
1108 * successfully to perform DDP on this I/O, otherwise this returns 0.
1110 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1111 * struct netdev_fcoe_hbainfo *hbainfo);
1112 * Called when the FCoE Protocol stack wants information on the underlying
1113 * device. This information is utilized by the FCoE protocol stack to
1114 * register attributes with Fiber Channel management service as per the
1115 * FC-GS Fabric Device Management Information(FDMI) specification.
1117 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1118 * Called when the underlying device wants to override default World Wide
1119 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1120 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1121 * protocol stack to use.
1124 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1125 * u16 rxq_index, u32 flow_id);
1126 * Set hardware filter for RFS. rxq_index is the target queue index;
1127 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1128 * Return the filter ID on success, or a negative error code.
1130 * Slave management functions (for bridge, bonding, etc).
1131 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1132 * Called to make another netdev an underling.
1134 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1135 * Called to release previously enslaved netdev.
1137 * Feature/offload setting functions.
1138 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1139 * netdev_features_t features);
1140 * Adjusts the requested feature flags according to device-specific
1141 * constraints, and returns the resulting flags. Must not modify
1144 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1145 * Called to update device configuration to new features. Passed
1146 * feature set might be less than what was returned by ndo_fix_features()).
1147 * Must return >0 or -errno if it changed dev->features itself.
1149 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1150 * struct net_device *dev,
1151 * const unsigned char *addr, u16 vid, u16 flags,
1152 * struct netlink_ext_ack *extack);
1153 * Adds an FDB entry to dev for addr.
1154 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1155 * struct net_device *dev,
1156 * const unsigned char *addr, u16 vid)
1157 * Deletes the FDB entry from dev coresponding to addr.
1158 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1159 * struct net_device *dev, struct net_device *filter_dev,
1161 * Used to add FDB entries to dump requests. Implementers should add
1162 * entries to skb and update idx with the number of entries.
1164 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1165 * u16 flags, struct netlink_ext_ack *extack)
1166 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1167 * struct net_device *dev, u32 filter_mask,
1169 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1172 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1173 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1174 * which do not represent real hardware may define this to allow their
1175 * userspace components to manage their virtual carrier state. Devices
1176 * that determine carrier state from physical hardware properties (eg
1177 * network cables) or protocol-dependent mechanisms (eg
1178 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1180 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1181 * struct netdev_phys_item_id *ppid);
1182 * Called to get ID of physical port of this device. If driver does
1183 * not implement this, it is assumed that the hw is not able to have
1184 * multiple net devices on single physical port.
1186 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1187 * struct netdev_phys_item_id *ppid)
1188 * Called to get the parent ID of the physical port of this device.
1190 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1191 * struct udp_tunnel_info *ti);
1192 * Called by UDP tunnel to notify a driver about the UDP port and socket
1193 * address family that a UDP tunnel is listnening to. It is called only
1194 * when a new port starts listening. The operation is protected by the
1197 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1198 * struct udp_tunnel_info *ti);
1199 * Called by UDP tunnel to notify the driver about a UDP port and socket
1200 * address family that the UDP tunnel is not listening to anymore. The
1201 * operation is protected by the RTNL.
1203 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1204 * struct net_device *dev)
1205 * Called by upper layer devices to accelerate switching or other
1206 * station functionality into hardware. 'pdev is the lowerdev
1207 * to use for the offload and 'dev' is the net device that will
1208 * back the offload. Returns a pointer to the private structure
1209 * the upper layer will maintain.
1210 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1211 * Called by upper layer device to delete the station created
1212 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1213 * the station and priv is the structure returned by the add
1215 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1216 * int queue_index, u32 maxrate);
1217 * Called when a user wants to set a max-rate limitation of specific
1219 * int (*ndo_get_iflink)(const struct net_device *dev);
1220 * Called to get the iflink value of this device.
1221 * void (*ndo_change_proto_down)(struct net_device *dev,
1223 * This function is used to pass protocol port error state information
1224 * to the switch driver. The switch driver can react to the proto_down
1225 * by doing a phys down on the associated switch port.
1226 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1227 * This function is used to get egress tunnel information for given skb.
1228 * This is useful for retrieving outer tunnel header parameters while
1230 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1231 * This function is used to specify the headroom that the skb must
1232 * consider when allocation skb during packet reception. Setting
1233 * appropriate rx headroom value allows avoiding skb head copy on
1234 * forward. Setting a negative value resets the rx headroom to the
1236 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1237 * This function is used to set or query state related to XDP on the
1238 * netdevice and manage BPF offload. See definition of
1239 * enum bpf_netdev_command for details.
1240 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1242 * This function is used to submit @n XDP packets for transmit on a
1243 * netdevice. Returns number of frames successfully transmitted, frames
1244 * that got dropped are freed/returned via xdp_return_frame().
1245 * Returns negative number, means general error invoking ndo, meaning
1246 * no frames were xmit'ed and core-caller will free all frames.
1247 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1248 * This function is used to wake up the softirq, ksoftirqd or kthread
1249 * responsible for sending and/or receiving packets on a specific
1250 * queue id bound to an AF_XDP socket. The flags field specifies if
1251 * only RX, only Tx, or both should be woken up using the flags
1252 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1253 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1254 * Get devlink port instance associated with a given netdev.
1255 * Called with a reference on the netdevice and devlink locks only,
1256 * rtnl_lock is not held.
1258 struct net_device_ops {
1259 int (*ndo_init)(struct net_device *dev);
1260 void (*ndo_uninit)(struct net_device *dev);
1261 int (*ndo_open)(struct net_device *dev);
1262 int (*ndo_stop)(struct net_device *dev);
1263 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1264 struct net_device *dev);
1265 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1266 struct net_device *dev,
1267 netdev_features_t features);
1268 u16 (*ndo_select_queue)(struct net_device *dev,
1269 struct sk_buff *skb,
1270 struct net_device *sb_dev);
1271 void (*ndo_change_rx_flags)(struct net_device *dev,
1273 void (*ndo_set_rx_mode)(struct net_device *dev);
1274 int (*ndo_set_mac_address)(struct net_device *dev,
1276 int (*ndo_validate_addr)(struct net_device *dev);
1277 int (*ndo_do_ioctl)(struct net_device *dev,
1278 struct ifreq *ifr, int cmd);
1279 int (*ndo_set_config)(struct net_device *dev,
1281 int (*ndo_change_mtu)(struct net_device *dev,
1283 int (*ndo_neigh_setup)(struct net_device *dev,
1284 struct neigh_parms *);
1285 void (*ndo_tx_timeout) (struct net_device *dev,
1286 unsigned int txqueue);
1288 void (*ndo_get_stats64)(struct net_device *dev,
1289 struct rtnl_link_stats64 *storage);
1290 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1291 int (*ndo_get_offload_stats)(int attr_id,
1292 const struct net_device *dev,
1294 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1296 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1297 __be16 proto, u16 vid);
1298 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1299 __be16 proto, u16 vid);
1300 #ifdef CONFIG_NET_POLL_CONTROLLER
1301 void (*ndo_poll_controller)(struct net_device *dev);
1302 int (*ndo_netpoll_setup)(struct net_device *dev,
1303 struct netpoll_info *info);
1304 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1306 int (*ndo_set_vf_mac)(struct net_device *dev,
1307 int queue, u8 *mac);
1308 int (*ndo_set_vf_vlan)(struct net_device *dev,
1309 int queue, u16 vlan,
1310 u8 qos, __be16 proto);
1311 int (*ndo_set_vf_rate)(struct net_device *dev,
1312 int vf, int min_tx_rate,
1314 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1315 int vf, bool setting);
1316 int (*ndo_set_vf_trust)(struct net_device *dev,
1317 int vf, bool setting);
1318 int (*ndo_get_vf_config)(struct net_device *dev,
1320 struct ifla_vf_info *ivf);
1321 int (*ndo_set_vf_link_state)(struct net_device *dev,
1322 int vf, int link_state);
1323 int (*ndo_get_vf_stats)(struct net_device *dev,
1325 struct ifla_vf_stats
1327 int (*ndo_set_vf_port)(struct net_device *dev,
1329 struct nlattr *port[]);
1330 int (*ndo_get_vf_port)(struct net_device *dev,
1331 int vf, struct sk_buff *skb);
1332 int (*ndo_get_vf_guid)(struct net_device *dev,
1334 struct ifla_vf_guid *node_guid,
1335 struct ifla_vf_guid *port_guid);
1336 int (*ndo_set_vf_guid)(struct net_device *dev,
1339 int (*ndo_set_vf_rss_query_en)(
1340 struct net_device *dev,
1341 int vf, bool setting);
1342 int (*ndo_setup_tc)(struct net_device *dev,
1343 enum tc_setup_type type,
1345 #if IS_ENABLED(CONFIG_FCOE)
1346 int (*ndo_fcoe_enable)(struct net_device *dev);
1347 int (*ndo_fcoe_disable)(struct net_device *dev);
1348 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1350 struct scatterlist *sgl,
1352 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1354 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1356 struct scatterlist *sgl,
1358 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1359 struct netdev_fcoe_hbainfo *hbainfo);
1362 #if IS_ENABLED(CONFIG_LIBFCOE)
1363 #define NETDEV_FCOE_WWNN 0
1364 #define NETDEV_FCOE_WWPN 1
1365 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1366 u64 *wwn, int type);
1369 #ifdef CONFIG_RFS_ACCEL
1370 int (*ndo_rx_flow_steer)(struct net_device *dev,
1371 const struct sk_buff *skb,
1375 int (*ndo_add_slave)(struct net_device *dev,
1376 struct net_device *slave_dev,
1377 struct netlink_ext_ack *extack);
1378 int (*ndo_del_slave)(struct net_device *dev,
1379 struct net_device *slave_dev);
1380 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1381 netdev_features_t features);
1382 int (*ndo_set_features)(struct net_device *dev,
1383 netdev_features_t features);
1384 int (*ndo_neigh_construct)(struct net_device *dev,
1385 struct neighbour *n);
1386 void (*ndo_neigh_destroy)(struct net_device *dev,
1387 struct neighbour *n);
1389 int (*ndo_fdb_add)(struct ndmsg *ndm,
1390 struct nlattr *tb[],
1391 struct net_device *dev,
1392 const unsigned char *addr,
1395 struct netlink_ext_ack *extack);
1396 int (*ndo_fdb_del)(struct ndmsg *ndm,
1397 struct nlattr *tb[],
1398 struct net_device *dev,
1399 const unsigned char *addr,
1401 int (*ndo_fdb_dump)(struct sk_buff *skb,
1402 struct netlink_callback *cb,
1403 struct net_device *dev,
1404 struct net_device *filter_dev,
1406 int (*ndo_fdb_get)(struct sk_buff *skb,
1407 struct nlattr *tb[],
1408 struct net_device *dev,
1409 const unsigned char *addr,
1410 u16 vid, u32 portid, u32 seq,
1411 struct netlink_ext_ack *extack);
1412 int (*ndo_bridge_setlink)(struct net_device *dev,
1413 struct nlmsghdr *nlh,
1415 struct netlink_ext_ack *extack);
1416 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1418 struct net_device *dev,
1421 int (*ndo_bridge_dellink)(struct net_device *dev,
1422 struct nlmsghdr *nlh,
1424 int (*ndo_change_carrier)(struct net_device *dev,
1426 int (*ndo_get_phys_port_id)(struct net_device *dev,
1427 struct netdev_phys_item_id *ppid);
1428 int (*ndo_get_port_parent_id)(struct net_device *dev,
1429 struct netdev_phys_item_id *ppid);
1430 int (*ndo_get_phys_port_name)(struct net_device *dev,
1431 char *name, size_t len);
1432 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1433 struct udp_tunnel_info *ti);
1434 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1435 struct udp_tunnel_info *ti);
1436 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1437 struct net_device *dev);
1438 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1441 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1444 int (*ndo_get_iflink)(const struct net_device *dev);
1445 int (*ndo_change_proto_down)(struct net_device *dev,
1447 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1448 struct sk_buff *skb);
1449 void (*ndo_set_rx_headroom)(struct net_device *dev,
1450 int needed_headroom);
1451 int (*ndo_bpf)(struct net_device *dev,
1452 struct netdev_bpf *bpf);
1453 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1454 struct xdp_frame **xdp,
1456 int (*ndo_xsk_wakeup)(struct net_device *dev,
1457 u32 queue_id, u32 flags);
1458 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1462 * enum net_device_priv_flags - &struct net_device priv_flags
1464 * These are the &struct net_device, they are only set internally
1465 * by drivers and used in the kernel. These flags are invisible to
1466 * userspace; this means that the order of these flags can change
1467 * during any kernel release.
1469 * You should have a pretty good reason to be extending these flags.
1471 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1472 * @IFF_EBRIDGE: Ethernet bridging device
1473 * @IFF_BONDING: bonding master or slave
1474 * @IFF_ISATAP: ISATAP interface (RFC4214)
1475 * @IFF_WAN_HDLC: WAN HDLC device
1476 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1478 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1479 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1480 * @IFF_MACVLAN_PORT: device used as macvlan port
1481 * @IFF_BRIDGE_PORT: device used as bridge port
1482 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1483 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1484 * @IFF_UNICAST_FLT: Supports unicast filtering
1485 * @IFF_TEAM_PORT: device used as team port
1486 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1487 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1488 * change when it's running
1489 * @IFF_MACVLAN: Macvlan device
1490 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1491 * underlying stacked devices
1492 * @IFF_L3MDEV_MASTER: device is an L3 master device
1493 * @IFF_NO_QUEUE: device can run without qdisc attached
1494 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1495 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1496 * @IFF_TEAM: device is a team device
1497 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1498 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1499 * entity (i.e. the master device for bridged veth)
1500 * @IFF_MACSEC: device is a MACsec device
1501 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1502 * @IFF_FAILOVER: device is a failover master device
1503 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1504 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1505 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1507 enum netdev_priv_flags {
1508 IFF_802_1Q_VLAN = 1<<0,
1512 IFF_WAN_HDLC = 1<<4,
1513 IFF_XMIT_DST_RELEASE = 1<<5,
1514 IFF_DONT_BRIDGE = 1<<6,
1515 IFF_DISABLE_NETPOLL = 1<<7,
1516 IFF_MACVLAN_PORT = 1<<8,
1517 IFF_BRIDGE_PORT = 1<<9,
1518 IFF_OVS_DATAPATH = 1<<10,
1519 IFF_TX_SKB_SHARING = 1<<11,
1520 IFF_UNICAST_FLT = 1<<12,
1521 IFF_TEAM_PORT = 1<<13,
1522 IFF_SUPP_NOFCS = 1<<14,
1523 IFF_LIVE_ADDR_CHANGE = 1<<15,
1524 IFF_MACVLAN = 1<<16,
1525 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1526 IFF_L3MDEV_MASTER = 1<<18,
1527 IFF_NO_QUEUE = 1<<19,
1528 IFF_OPENVSWITCH = 1<<20,
1529 IFF_L3MDEV_SLAVE = 1<<21,
1531 IFF_RXFH_CONFIGURED = 1<<23,
1532 IFF_PHONY_HEADROOM = 1<<24,
1534 IFF_NO_RX_HANDLER = 1<<26,
1535 IFF_FAILOVER = 1<<27,
1536 IFF_FAILOVER_SLAVE = 1<<28,
1537 IFF_L3MDEV_RX_HANDLER = 1<<29,
1538 IFF_LIVE_RENAME_OK = 1<<30,
1541 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1542 #define IFF_EBRIDGE IFF_EBRIDGE
1543 #define IFF_BONDING IFF_BONDING
1544 #define IFF_ISATAP IFF_ISATAP
1545 #define IFF_WAN_HDLC IFF_WAN_HDLC
1546 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1547 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1548 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1549 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1550 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1551 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1552 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1553 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1554 #define IFF_TEAM_PORT IFF_TEAM_PORT
1555 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1556 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1557 #define IFF_MACVLAN IFF_MACVLAN
1558 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1559 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1560 #define IFF_NO_QUEUE IFF_NO_QUEUE
1561 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1562 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1563 #define IFF_TEAM IFF_TEAM
1564 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1565 #define IFF_MACSEC IFF_MACSEC
1566 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1567 #define IFF_FAILOVER IFF_FAILOVER
1568 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1569 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1570 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1573 * struct net_device - The DEVICE structure.
1575 * Actually, this whole structure is a big mistake. It mixes I/O
1576 * data with strictly "high-level" data, and it has to know about
1577 * almost every data structure used in the INET module.
1579 * @name: This is the first field of the "visible" part of this structure
1580 * (i.e. as seen by users in the "Space.c" file). It is the name
1583 * @name_node: Name hashlist node
1584 * @ifalias: SNMP alias
1585 * @mem_end: Shared memory end
1586 * @mem_start: Shared memory start
1587 * @base_addr: Device I/O address
1588 * @irq: Device IRQ number
1590 * @state: Generic network queuing layer state, see netdev_state_t
1591 * @dev_list: The global list of network devices
1592 * @napi_list: List entry used for polling NAPI devices
1593 * @unreg_list: List entry when we are unregistering the
1594 * device; see the function unregister_netdev
1595 * @close_list: List entry used when we are closing the device
1596 * @ptype_all: Device-specific packet handlers for all protocols
1597 * @ptype_specific: Device-specific, protocol-specific packet handlers
1599 * @adj_list: Directly linked devices, like slaves for bonding
1600 * @features: Currently active device features
1601 * @hw_features: User-changeable features
1603 * @wanted_features: User-requested features
1604 * @vlan_features: Mask of features inheritable by VLAN devices
1606 * @hw_enc_features: Mask of features inherited by encapsulating devices
1607 * This field indicates what encapsulation
1608 * offloads the hardware is capable of doing,
1609 * and drivers will need to set them appropriately.
1611 * @mpls_features: Mask of features inheritable by MPLS
1613 * @ifindex: interface index
1614 * @group: The group the device belongs to
1616 * @stats: Statistics struct, which was left as a legacy, use
1617 * rtnl_link_stats64 instead
1619 * @rx_dropped: Dropped packets by core network,
1620 * do not use this in drivers
1621 * @tx_dropped: Dropped packets by core network,
1622 * do not use this in drivers
1623 * @rx_nohandler: nohandler dropped packets by core network on
1624 * inactive devices, do not use this in drivers
1625 * @carrier_up_count: Number of times the carrier has been up
1626 * @carrier_down_count: Number of times the carrier has been down
1628 * @wireless_handlers: List of functions to handle Wireless Extensions,
1630 * see <net/iw_handler.h> for details.
1631 * @wireless_data: Instance data managed by the core of wireless extensions
1633 * @netdev_ops: Includes several pointers to callbacks,
1634 * if one wants to override the ndo_*() functions
1635 * @ethtool_ops: Management operations
1636 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1637 * discovery handling. Necessary for e.g. 6LoWPAN.
1638 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1639 * of Layer 2 headers.
1641 * @flags: Interface flags (a la BSD)
1642 * @priv_flags: Like 'flags' but invisible to userspace,
1643 * see if.h for the definitions
1644 * @gflags: Global flags ( kept as legacy )
1645 * @padded: How much padding added by alloc_netdev()
1646 * @operstate: RFC2863 operstate
1647 * @link_mode: Mapping policy to operstate
1648 * @if_port: Selectable AUI, TP, ...
1650 * @mtu: Interface MTU value
1651 * @min_mtu: Interface Minimum MTU value
1652 * @max_mtu: Interface Maximum MTU value
1653 * @type: Interface hardware type
1654 * @hard_header_len: Maximum hardware header length.
1655 * @min_header_len: Minimum hardware header length
1657 * @needed_headroom: Extra headroom the hardware may need, but not in all
1658 * cases can this be guaranteed
1659 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1660 * cases can this be guaranteed. Some cases also use
1661 * LL_MAX_HEADER instead to allocate the skb
1663 * interface address info:
1665 * @perm_addr: Permanent hw address
1666 * @addr_assign_type: Hw address assignment type
1667 * @addr_len: Hardware address length
1668 * @upper_level: Maximum depth level of upper devices.
1669 * @lower_level: Maximum depth level of lower devices.
1670 * @neigh_priv_len: Used in neigh_alloc()
1671 * @dev_id: Used to differentiate devices that share
1672 * the same link layer address
1673 * @dev_port: Used to differentiate devices that share
1675 * @addr_list_lock: XXX: need comments on this one
1676 * @uc_promisc: Counter that indicates promiscuous mode
1677 * has been enabled due to the need to listen to
1678 * additional unicast addresses in a device that
1679 * does not implement ndo_set_rx_mode()
1680 * @uc: unicast mac addresses
1681 * @mc: multicast mac addresses
1682 * @dev_addrs: list of device hw addresses
1683 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1684 * @promiscuity: Number of times the NIC is told to work in
1685 * promiscuous mode; if it becomes 0 the NIC will
1686 * exit promiscuous mode
1687 * @allmulti: Counter, enables or disables allmulticast mode
1689 * @vlan_info: VLAN info
1690 * @dsa_ptr: dsa specific data
1691 * @tipc_ptr: TIPC specific data
1692 * @atalk_ptr: AppleTalk link
1693 * @ip_ptr: IPv4 specific data
1694 * @dn_ptr: DECnet specific data
1695 * @ip6_ptr: IPv6 specific data
1696 * @ax25_ptr: AX.25 specific data
1697 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1699 * @dev_addr: Hw address (before bcast,
1700 * because most packets are unicast)
1702 * @_rx: Array of RX queues
1703 * @num_rx_queues: Number of RX queues
1704 * allocated at register_netdev() time
1705 * @real_num_rx_queues: Number of RX queues currently active in device
1707 * @rx_handler: handler for received packets
1708 * @rx_handler_data: XXX: need comments on this one
1709 * @miniq_ingress: ingress/clsact qdisc specific data for
1710 * ingress processing
1711 * @ingress_queue: XXX: need comments on this one
1712 * @broadcast: hw bcast address
1714 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1715 * indexed by RX queue number. Assigned by driver.
1716 * This must only be set if the ndo_rx_flow_steer
1717 * operation is defined
1718 * @index_hlist: Device index hash chain
1720 * @_tx: Array of TX queues
1721 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1722 * @real_num_tx_queues: Number of TX queues currently active in device
1723 * @qdisc: Root qdisc from userspace point of view
1724 * @tx_queue_len: Max frames per queue allowed
1725 * @tx_global_lock: XXX: need comments on this one
1727 * @xps_maps: XXX: need comments on this one
1728 * @miniq_egress: clsact qdisc specific data for
1730 * @watchdog_timeo: Represents the timeout that is used by
1731 * the watchdog (see dev_watchdog())
1732 * @watchdog_timer: List of timers
1734 * @pcpu_refcnt: Number of references to this device
1735 * @todo_list: Delayed register/unregister
1736 * @link_watch_list: XXX: need comments on this one
1738 * @reg_state: Register/unregister state machine
1739 * @dismantle: Device is going to be freed
1740 * @rtnl_link_state: This enum represents the phases of creating
1743 * @needs_free_netdev: Should unregister perform free_netdev?
1744 * @priv_destructor: Called from unregister
1745 * @npinfo: XXX: need comments on this one
1746 * @nd_net: Network namespace this network device is inside
1748 * @ml_priv: Mid-layer private
1749 * @lstats: Loopback statistics
1750 * @tstats: Tunnel statistics
1751 * @dstats: Dummy statistics
1752 * @vstats: Virtual ethernet statistics
1757 * @dev: Class/net/name entry
1758 * @sysfs_groups: Space for optional device, statistics and wireless
1761 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1762 * @rtnl_link_ops: Rtnl_link_ops
1764 * @gso_max_size: Maximum size of generic segmentation offload
1765 * @gso_max_segs: Maximum number of segments that can be passed to the
1768 * @dcbnl_ops: Data Center Bridging netlink ops
1769 * @num_tc: Number of traffic classes in the net device
1770 * @tc_to_txq: XXX: need comments on this one
1771 * @prio_tc_map: XXX: need comments on this one
1773 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1775 * @priomap: XXX: need comments on this one
1776 * @phydev: Physical device may attach itself
1777 * for hardware timestamping
1778 * @sfp_bus: attached &struct sfp_bus structure.
1779 * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
1781 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1782 * @qdisc_xmit_lock_key: lockdep class annotating
1783 * netdev_queue->_xmit_lock spinlock
1784 * @addr_list_lock_key: lockdep class annotating
1785 * net_device->addr_list_lock spinlock
1787 * @proto_down: protocol port state information can be sent to the
1788 * switch driver and used to set the phys state of the
1791 * @wol_enabled: Wake-on-LAN is enabled
1793 * FIXME: cleanup struct net_device such that network protocol info
1798 char name[IFNAMSIZ];
1799 struct netdev_name_node *name_node;
1800 struct dev_ifalias __rcu *ifalias;
1802 * I/O specific fields
1803 * FIXME: Merge these and struct ifmap into one
1805 unsigned long mem_end;
1806 unsigned long mem_start;
1807 unsigned long base_addr;
1811 * Some hardware also needs these fields (state,dev_list,
1812 * napi_list,unreg_list,close_list) but they are not
1813 * part of the usual set specified in Space.c.
1816 unsigned long state;
1818 struct list_head dev_list;
1819 struct list_head napi_list;
1820 struct list_head unreg_list;
1821 struct list_head close_list;
1822 struct list_head ptype_all;
1823 struct list_head ptype_specific;
1826 struct list_head upper;
1827 struct list_head lower;
1830 netdev_features_t features;
1831 netdev_features_t hw_features;
1832 netdev_features_t wanted_features;
1833 netdev_features_t vlan_features;
1834 netdev_features_t hw_enc_features;
1835 netdev_features_t mpls_features;
1836 netdev_features_t gso_partial_features;
1841 struct net_device_stats stats;
1843 atomic_long_t rx_dropped;
1844 atomic_long_t tx_dropped;
1845 atomic_long_t rx_nohandler;
1847 /* Stats to monitor link on/off, flapping */
1848 atomic_t carrier_up_count;
1849 atomic_t carrier_down_count;
1851 #ifdef CONFIG_WIRELESS_EXT
1852 const struct iw_handler_def *wireless_handlers;
1853 struct iw_public_data *wireless_data;
1855 const struct net_device_ops *netdev_ops;
1856 const struct ethtool_ops *ethtool_ops;
1857 #ifdef CONFIG_NET_L3_MASTER_DEV
1858 const struct l3mdev_ops *l3mdev_ops;
1860 #if IS_ENABLED(CONFIG_IPV6)
1861 const struct ndisc_ops *ndisc_ops;
1864 #ifdef CONFIG_XFRM_OFFLOAD
1865 const struct xfrmdev_ops *xfrmdev_ops;
1868 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1869 const struct tlsdev_ops *tlsdev_ops;
1872 const struct header_ops *header_ops;
1875 unsigned int priv_flags;
1877 unsigned short gflags;
1878 unsigned short padded;
1880 unsigned char operstate;
1881 unsigned char link_mode;
1883 unsigned char if_port;
1886 /* Note : dev->mtu is often read without holding a lock.
1887 * Writers usually hold RTNL.
1888 * It is recommended to use READ_ONCE() to annotate the reads,
1889 * and to use WRITE_ONCE() to annotate the writes.
1892 unsigned int min_mtu;
1893 unsigned int max_mtu;
1894 unsigned short type;
1895 unsigned short hard_header_len;
1896 unsigned char min_header_len;
1898 unsigned short needed_headroom;
1899 unsigned short needed_tailroom;
1901 /* Interface address info. */
1902 unsigned char perm_addr[MAX_ADDR_LEN];
1903 unsigned char addr_assign_type;
1904 unsigned char addr_len;
1905 unsigned char upper_level;
1906 unsigned char lower_level;
1907 unsigned short neigh_priv_len;
1908 unsigned short dev_id;
1909 unsigned short dev_port;
1910 spinlock_t addr_list_lock;
1911 unsigned char name_assign_type;
1913 struct netdev_hw_addr_list uc;
1914 struct netdev_hw_addr_list mc;
1915 struct netdev_hw_addr_list dev_addrs;
1918 struct kset *queues_kset;
1920 unsigned int promiscuity;
1921 unsigned int allmulti;
1924 /* Protocol-specific pointers */
1926 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1927 struct vlan_info __rcu *vlan_info;
1929 #if IS_ENABLED(CONFIG_NET_DSA)
1930 struct dsa_port *dsa_ptr;
1932 #if IS_ENABLED(CONFIG_TIPC)
1933 struct tipc_bearer __rcu *tipc_ptr;
1935 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1938 struct in_device __rcu *ip_ptr;
1939 #if IS_ENABLED(CONFIG_DECNET)
1940 struct dn_dev __rcu *dn_ptr;
1942 struct inet6_dev __rcu *ip6_ptr;
1943 #if IS_ENABLED(CONFIG_AX25)
1946 struct wireless_dev *ieee80211_ptr;
1947 struct wpan_dev *ieee802154_ptr;
1948 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1949 struct mpls_dev __rcu *mpls_ptr;
1953 * Cache lines mostly used on receive path (including eth_type_trans())
1955 /* Interface address info used in eth_type_trans() */
1956 unsigned char *dev_addr;
1958 struct netdev_rx_queue *_rx;
1959 unsigned int num_rx_queues;
1960 unsigned int real_num_rx_queues;
1962 struct bpf_prog __rcu *xdp_prog;
1963 unsigned long gro_flush_timeout;
1964 rx_handler_func_t __rcu *rx_handler;
1965 void __rcu *rx_handler_data;
1967 #ifdef CONFIG_NET_CLS_ACT
1968 struct mini_Qdisc __rcu *miniq_ingress;
1970 struct netdev_queue __rcu *ingress_queue;
1971 #ifdef CONFIG_NETFILTER_INGRESS
1972 struct nf_hook_entries __rcu *nf_hooks_ingress;
1975 unsigned char broadcast[MAX_ADDR_LEN];
1976 #ifdef CONFIG_RFS_ACCEL
1977 struct cpu_rmap *rx_cpu_rmap;
1979 struct hlist_node index_hlist;
1982 * Cache lines mostly used on transmit path
1984 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1985 unsigned int num_tx_queues;
1986 unsigned int real_num_tx_queues;
1987 struct Qdisc *qdisc;
1988 #ifdef CONFIG_NET_SCHED
1989 DECLARE_HASHTABLE (qdisc_hash, 4);
1991 unsigned int tx_queue_len;
1992 spinlock_t tx_global_lock;
1996 struct xps_dev_maps __rcu *xps_cpus_map;
1997 struct xps_dev_maps __rcu *xps_rxqs_map;
1999 #ifdef CONFIG_NET_CLS_ACT
2000 struct mini_Qdisc __rcu *miniq_egress;
2003 /* These may be needed for future network-power-down code. */
2004 struct timer_list watchdog_timer;
2006 int __percpu *pcpu_refcnt;
2007 struct list_head todo_list;
2009 struct list_head link_watch_list;
2011 enum { NETREG_UNINITIALIZED=0,
2012 NETREG_REGISTERED, /* completed register_netdevice */
2013 NETREG_UNREGISTERING, /* called unregister_netdevice */
2014 NETREG_UNREGISTERED, /* completed unregister todo */
2015 NETREG_RELEASED, /* called free_netdev */
2016 NETREG_DUMMY, /* dummy device for NAPI poll */
2022 RTNL_LINK_INITIALIZED,
2023 RTNL_LINK_INITIALIZING,
2024 } rtnl_link_state:16;
2026 bool needs_free_netdev;
2027 void (*priv_destructor)(struct net_device *dev);
2029 #ifdef CONFIG_NETPOLL
2030 struct netpoll_info __rcu *npinfo;
2033 possible_net_t nd_net;
2035 /* mid-layer private */
2038 struct pcpu_lstats __percpu *lstats;
2039 struct pcpu_sw_netstats __percpu *tstats;
2040 struct pcpu_dstats __percpu *dstats;
2043 #if IS_ENABLED(CONFIG_GARP)
2044 struct garp_port __rcu *garp_port;
2046 #if IS_ENABLED(CONFIG_MRP)
2047 struct mrp_port __rcu *mrp_port;
2051 const struct attribute_group *sysfs_groups[4];
2052 const struct attribute_group *sysfs_rx_queue_group;
2054 const struct rtnl_link_ops *rtnl_link_ops;
2056 /* for setting kernel sock attribute on TCP connection setup */
2057 #define GSO_MAX_SIZE 65536
2058 unsigned int gso_max_size;
2059 #define GSO_MAX_SEGS 65535
2063 const struct dcbnl_rtnl_ops *dcbnl_ops;
2066 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2067 u8 prio_tc_map[TC_BITMASK + 1];
2069 #if IS_ENABLED(CONFIG_FCOE)
2070 unsigned int fcoe_ddp_xid;
2072 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2073 struct netprio_map __rcu *priomap;
2075 struct phy_device *phydev;
2076 struct sfp_bus *sfp_bus;
2077 struct lock_class_key qdisc_tx_busylock_key;
2078 struct lock_class_key qdisc_running_key;
2079 struct lock_class_key qdisc_xmit_lock_key;
2080 struct lock_class_key addr_list_lock_key;
2082 unsigned wol_enabled:1;
2084 #define to_net_dev(d) container_of(d, struct net_device, dev)
2086 static inline bool netif_elide_gro(const struct net_device *dev)
2088 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2093 #define NETDEV_ALIGN 32
2096 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2098 return dev->prio_tc_map[prio & TC_BITMASK];
2102 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2104 if (tc >= dev->num_tc)
2107 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2111 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2112 void netdev_reset_tc(struct net_device *dev);
2113 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2114 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2117 int netdev_get_num_tc(struct net_device *dev)
2122 void netdev_unbind_sb_channel(struct net_device *dev,
2123 struct net_device *sb_dev);
2124 int netdev_bind_sb_channel_queue(struct net_device *dev,
2125 struct net_device *sb_dev,
2126 u8 tc, u16 count, u16 offset);
2127 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2128 static inline int netdev_get_sb_channel(struct net_device *dev)
2130 return max_t(int, -dev->num_tc, 0);
2134 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2137 return &dev->_tx[index];
2140 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2141 const struct sk_buff *skb)
2143 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2146 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2147 void (*f)(struct net_device *,
2148 struct netdev_queue *,
2154 for (i = 0; i < dev->num_tx_queues; i++)
2155 f(dev, &dev->_tx[i], arg);
2158 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2159 struct net_device *sb_dev);
2160 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2161 struct sk_buff *skb,
2162 struct net_device *sb_dev);
2164 /* returns the headroom that the master device needs to take in account
2165 * when forwarding to this dev
2167 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2169 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2172 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2174 if (dev->netdev_ops->ndo_set_rx_headroom)
2175 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2178 /* set the device rx headroom to the dev's default */
2179 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2181 netdev_set_rx_headroom(dev, -1);
2185 * Net namespace inlines
2188 struct net *dev_net(const struct net_device *dev)
2190 return read_pnet(&dev->nd_net);
2194 void dev_net_set(struct net_device *dev, struct net *net)
2196 write_pnet(&dev->nd_net, net);
2200 * netdev_priv - access network device private data
2201 * @dev: network device
2203 * Get network device private data
2205 static inline void *netdev_priv(const struct net_device *dev)
2207 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2210 /* Set the sysfs physical device reference for the network logical device
2211 * if set prior to registration will cause a symlink during initialization.
2213 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2215 /* Set the sysfs device type for the network logical device to allow
2216 * fine-grained identification of different network device types. For
2217 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2219 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2221 /* Default NAPI poll() weight
2222 * Device drivers are strongly advised to not use bigger value
2224 #define NAPI_POLL_WEIGHT 64
2227 * netif_napi_add - initialize a NAPI context
2228 * @dev: network device
2229 * @napi: NAPI context
2230 * @poll: polling function
2231 * @weight: default weight
2233 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2234 * *any* of the other NAPI-related functions.
2236 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2237 int (*poll)(struct napi_struct *, int), int weight);
2240 * netif_tx_napi_add - initialize a NAPI context
2241 * @dev: network device
2242 * @napi: NAPI context
2243 * @poll: polling function
2244 * @weight: default weight
2246 * This variant of netif_napi_add() should be used from drivers using NAPI
2247 * to exclusively poll a TX queue.
2248 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2250 static inline void netif_tx_napi_add(struct net_device *dev,
2251 struct napi_struct *napi,
2252 int (*poll)(struct napi_struct *, int),
2255 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2256 netif_napi_add(dev, napi, poll, weight);
2260 * netif_napi_del - remove a NAPI context
2261 * @napi: NAPI context
2263 * netif_napi_del() removes a NAPI context from the network device NAPI list
2265 void netif_napi_del(struct napi_struct *napi);
2267 struct napi_gro_cb {
2268 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2271 /* Length of frag0. */
2272 unsigned int frag0_len;
2274 /* This indicates where we are processing relative to skb->data. */
2277 /* This is non-zero if the packet cannot be merged with the new skb. */
2280 /* Save the IP ID here and check when we get to the transport layer */
2283 /* Number of segments aggregated. */
2286 /* Start offset for remote checksum offload */
2287 u16 gro_remcsum_start;
2289 /* jiffies when first packet was created/queued */
2292 /* Used in ipv6_gro_receive() and foo-over-udp */
2295 /* This is non-zero if the packet may be of the same flow. */
2298 /* Used in tunnel GRO receive */
2301 /* GRO checksum is valid */
2304 /* Number of checksums via CHECKSUM_UNNECESSARY */
2309 #define NAPI_GRO_FREE 1
2310 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2312 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2315 /* Used in GRE, set in fou/gue_gro_receive */
2318 /* Used to determine if flush_id can be ignored */
2321 /* Number of gro_receive callbacks this packet already went through */
2322 u8 recursion_counter:4;
2326 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2329 /* used in skb_gro_receive() slow path */
2330 struct sk_buff *last;
2333 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2335 #define GRO_RECURSION_LIMIT 15
2336 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2338 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2341 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2342 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2343 struct list_head *head,
2344 struct sk_buff *skb)
2346 if (unlikely(gro_recursion_inc_test(skb))) {
2347 NAPI_GRO_CB(skb)->flush |= 1;
2351 return cb(head, skb);
2354 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2356 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2358 struct list_head *head,
2359 struct sk_buff *skb)
2361 if (unlikely(gro_recursion_inc_test(skb))) {
2362 NAPI_GRO_CB(skb)->flush |= 1;
2366 return cb(sk, head, skb);
2369 struct packet_type {
2370 __be16 type; /* This is really htons(ether_type). */
2371 bool ignore_outgoing;
2372 struct net_device *dev; /* NULL is wildcarded here */
2373 int (*func) (struct sk_buff *,
2374 struct net_device *,
2375 struct packet_type *,
2376 struct net_device *);
2377 void (*list_func) (struct list_head *,
2378 struct packet_type *,
2379 struct net_device *);
2380 bool (*id_match)(struct packet_type *ptype,
2382 void *af_packet_priv;
2383 struct list_head list;
2386 struct offload_callbacks {
2387 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2388 netdev_features_t features);
2389 struct sk_buff *(*gro_receive)(struct list_head *head,
2390 struct sk_buff *skb);
2391 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2394 struct packet_offload {
2395 __be16 type; /* This is really htons(ether_type). */
2397 struct offload_callbacks callbacks;
2398 struct list_head list;
2401 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2402 struct pcpu_sw_netstats {
2407 struct u64_stats_sync syncp;
2408 } __aligned(4 * sizeof(u64));
2410 struct pcpu_lstats {
2411 u64_stats_t packets;
2413 struct u64_stats_sync syncp;
2414 } __aligned(2 * sizeof(u64));
2416 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2418 static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2420 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2422 u64_stats_update_begin(&lstats->syncp);
2423 u64_stats_add(&lstats->bytes, len);
2424 u64_stats_inc(&lstats->packets);
2425 u64_stats_update_end(&lstats->syncp);
2428 #define __netdev_alloc_pcpu_stats(type, gfp) \
2430 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2433 for_each_possible_cpu(__cpu) { \
2434 typeof(type) *stat; \
2435 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2436 u64_stats_init(&stat->syncp); \
2442 #define netdev_alloc_pcpu_stats(type) \
2443 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2445 enum netdev_lag_tx_type {
2446 NETDEV_LAG_TX_TYPE_UNKNOWN,
2447 NETDEV_LAG_TX_TYPE_RANDOM,
2448 NETDEV_LAG_TX_TYPE_BROADCAST,
2449 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2450 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2451 NETDEV_LAG_TX_TYPE_HASH,
2454 enum netdev_lag_hash {
2455 NETDEV_LAG_HASH_NONE,
2457 NETDEV_LAG_HASH_L34,
2458 NETDEV_LAG_HASH_L23,
2459 NETDEV_LAG_HASH_E23,
2460 NETDEV_LAG_HASH_E34,
2461 NETDEV_LAG_HASH_UNKNOWN,
2464 struct netdev_lag_upper_info {
2465 enum netdev_lag_tx_type tx_type;
2466 enum netdev_lag_hash hash_type;
2469 struct netdev_lag_lower_state_info {
2474 #include <linux/notifier.h>
2476 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2477 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2481 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2483 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2484 detected a hardware crash and restarted
2485 - we can use this eg to kick tcp sessions
2487 NETDEV_CHANGE, /* Notify device state change */
2490 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2491 NETDEV_CHANGEADDR, /* notify after the address change */
2492 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2496 NETDEV_BONDING_FAILOVER,
2498 NETDEV_PRE_TYPE_CHANGE,
2499 NETDEV_POST_TYPE_CHANGE,
2502 NETDEV_NOTIFY_PEERS,
2506 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2507 NETDEV_CHANGEINFODATA,
2508 NETDEV_BONDING_INFO,
2509 NETDEV_PRECHANGEUPPER,
2510 NETDEV_CHANGELOWERSTATE,
2511 NETDEV_UDP_TUNNEL_PUSH_INFO,
2512 NETDEV_UDP_TUNNEL_DROP_INFO,
2513 NETDEV_CHANGE_TX_QUEUE_LEN,
2514 NETDEV_CVLAN_FILTER_PUSH_INFO,
2515 NETDEV_CVLAN_FILTER_DROP_INFO,
2516 NETDEV_SVLAN_FILTER_PUSH_INFO,
2517 NETDEV_SVLAN_FILTER_DROP_INFO,
2519 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2521 int register_netdevice_notifier(struct notifier_block *nb);
2522 int unregister_netdevice_notifier(struct notifier_block *nb);
2523 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2524 int unregister_netdevice_notifier_net(struct net *net,
2525 struct notifier_block *nb);
2527 struct netdev_notifier_info {
2528 struct net_device *dev;
2529 struct netlink_ext_ack *extack;
2532 struct netdev_notifier_info_ext {
2533 struct netdev_notifier_info info; /* must be first */
2539 struct netdev_notifier_change_info {
2540 struct netdev_notifier_info info; /* must be first */
2541 unsigned int flags_changed;
2544 struct netdev_notifier_changeupper_info {
2545 struct netdev_notifier_info info; /* must be first */
2546 struct net_device *upper_dev; /* new upper dev */
2547 bool master; /* is upper dev master */
2548 bool linking; /* is the notification for link or unlink */
2549 void *upper_info; /* upper dev info */
2552 struct netdev_notifier_changelowerstate_info {
2553 struct netdev_notifier_info info; /* must be first */
2554 void *lower_state_info; /* is lower dev state */
2557 struct netdev_notifier_pre_changeaddr_info {
2558 struct netdev_notifier_info info; /* must be first */
2559 const unsigned char *dev_addr;
2562 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2563 struct net_device *dev)
2566 info->extack = NULL;
2569 static inline struct net_device *
2570 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2575 static inline struct netlink_ext_ack *
2576 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2578 return info->extack;
2581 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2584 extern rwlock_t dev_base_lock; /* Device list lock */
2586 #define for_each_netdev(net, d) \
2587 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2588 #define for_each_netdev_reverse(net, d) \
2589 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2590 #define for_each_netdev_rcu(net, d) \
2591 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2592 #define for_each_netdev_safe(net, d, n) \
2593 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2594 #define for_each_netdev_continue(net, d) \
2595 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2596 #define for_each_netdev_continue_reverse(net, d) \
2597 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2599 #define for_each_netdev_continue_rcu(net, d) \
2600 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2601 #define for_each_netdev_in_bond_rcu(bond, slave) \
2602 for_each_netdev_rcu(&init_net, slave) \
2603 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2604 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2606 static inline struct net_device *next_net_device(struct net_device *dev)
2608 struct list_head *lh;
2612 lh = dev->dev_list.next;
2613 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2616 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2618 struct list_head *lh;
2622 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2623 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2626 static inline struct net_device *first_net_device(struct net *net)
2628 return list_empty(&net->dev_base_head) ? NULL :
2629 net_device_entry(net->dev_base_head.next);
2632 static inline struct net_device *first_net_device_rcu(struct net *net)
2634 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2636 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2639 int netdev_boot_setup_check(struct net_device *dev);
2640 unsigned long netdev_boot_base(const char *prefix, int unit);
2641 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2642 const char *hwaddr);
2643 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2644 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2645 void dev_add_pack(struct packet_type *pt);
2646 void dev_remove_pack(struct packet_type *pt);
2647 void __dev_remove_pack(struct packet_type *pt);
2648 void dev_add_offload(struct packet_offload *po);
2649 void dev_remove_offload(struct packet_offload *po);
2651 int dev_get_iflink(const struct net_device *dev);
2652 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2653 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2654 unsigned short mask);
2655 struct net_device *dev_get_by_name(struct net *net, const char *name);
2656 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2657 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2658 int dev_alloc_name(struct net_device *dev, const char *name);
2659 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2660 void dev_close(struct net_device *dev);
2661 void dev_close_many(struct list_head *head, bool unlink);
2662 void dev_disable_lro(struct net_device *dev);
2663 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2664 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2665 struct net_device *sb_dev);
2666 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2667 struct net_device *sb_dev);
2668 int dev_queue_xmit(struct sk_buff *skb);
2669 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2670 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2671 int register_netdevice(struct net_device *dev);
2672 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2673 void unregister_netdevice_many(struct list_head *head);
2674 static inline void unregister_netdevice(struct net_device *dev)
2676 unregister_netdevice_queue(dev, NULL);
2679 int netdev_refcnt_read(const struct net_device *dev);
2680 void free_netdev(struct net_device *dev);
2681 void netdev_freemem(struct net_device *dev);
2682 void synchronize_net(void);
2683 int init_dummy_netdev(struct net_device *dev);
2685 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2686 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2687 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2688 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2689 int netdev_get_name(struct net *net, char *name, int ifindex);
2690 int dev_restart(struct net_device *dev);
2691 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2693 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2695 return NAPI_GRO_CB(skb)->data_offset;
2698 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2700 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2703 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2705 NAPI_GRO_CB(skb)->data_offset += len;
2708 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2709 unsigned int offset)
2711 return NAPI_GRO_CB(skb)->frag0 + offset;
2714 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2716 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2719 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2721 NAPI_GRO_CB(skb)->frag0 = NULL;
2722 NAPI_GRO_CB(skb)->frag0_len = 0;
2725 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2726 unsigned int offset)
2728 if (!pskb_may_pull(skb, hlen))
2731 skb_gro_frag0_invalidate(skb);
2732 return skb->data + offset;
2735 static inline void *skb_gro_network_header(struct sk_buff *skb)
2737 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2738 skb_network_offset(skb);
2741 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2742 const void *start, unsigned int len)
2744 if (NAPI_GRO_CB(skb)->csum_valid)
2745 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2746 csum_partial(start, len, 0));
2749 /* GRO checksum functions. These are logical equivalents of the normal
2750 * checksum functions (in skbuff.h) except that they operate on the GRO
2751 * offsets and fields in sk_buff.
2754 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2756 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2758 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2761 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2765 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2766 skb_checksum_start_offset(skb) <
2767 skb_gro_offset(skb)) &&
2768 !skb_at_gro_remcsum_start(skb) &&
2769 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2770 (!zero_okay || check));
2773 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2776 if (NAPI_GRO_CB(skb)->csum_valid &&
2777 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2780 NAPI_GRO_CB(skb)->csum = psum;
2782 return __skb_gro_checksum_complete(skb);
2785 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2787 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2788 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2789 NAPI_GRO_CB(skb)->csum_cnt--;
2791 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2792 * verified a new top level checksum or an encapsulated one
2793 * during GRO. This saves work if we fallback to normal path.
2795 __skb_incr_checksum_unnecessary(skb);
2799 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2802 __sum16 __ret = 0; \
2803 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2804 __ret = __skb_gro_checksum_validate_complete(skb, \
2805 compute_pseudo(skb, proto)); \
2807 skb_gro_incr_csum_unnecessary(skb); \
2811 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2812 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2814 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2816 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2818 #define skb_gro_checksum_simple_validate(skb) \
2819 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2821 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2823 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2824 !NAPI_GRO_CB(skb)->csum_valid);
2827 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2828 __sum16 check, __wsum pseudo)
2830 NAPI_GRO_CB(skb)->csum = ~pseudo;
2831 NAPI_GRO_CB(skb)->csum_valid = 1;
2834 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2836 if (__skb_gro_checksum_convert_check(skb)) \
2837 __skb_gro_checksum_convert(skb, check, \
2838 compute_pseudo(skb, proto)); \
2841 struct gro_remcsum {
2846 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2852 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2853 unsigned int off, size_t hdrlen,
2854 int start, int offset,
2855 struct gro_remcsum *grc,
2859 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2861 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2864 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2868 ptr = skb_gro_header_fast(skb, off);
2869 if (skb_gro_header_hard(skb, off + plen)) {
2870 ptr = skb_gro_header_slow(skb, off + plen, off);
2875 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2878 /* Adjust skb->csum since we changed the packet */
2879 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2881 grc->offset = off + hdrlen + offset;
2887 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2888 struct gro_remcsum *grc)
2891 size_t plen = grc->offset + sizeof(u16);
2896 ptr = skb_gro_header_fast(skb, grc->offset);
2897 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2898 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2903 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2906 #ifdef CONFIG_XFRM_OFFLOAD
2907 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2909 if (PTR_ERR(pp) != -EINPROGRESS)
2910 NAPI_GRO_CB(skb)->flush |= flush;
2912 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2915 struct gro_remcsum *grc)
2917 if (PTR_ERR(pp) != -EINPROGRESS) {
2918 NAPI_GRO_CB(skb)->flush |= flush;
2919 skb_gro_remcsum_cleanup(skb, grc);
2920 skb->remcsum_offload = 0;
2924 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2926 NAPI_GRO_CB(skb)->flush |= flush;
2928 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2931 struct gro_remcsum *grc)
2933 NAPI_GRO_CB(skb)->flush |= flush;
2934 skb_gro_remcsum_cleanup(skb, grc);
2935 skb->remcsum_offload = 0;
2939 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2940 unsigned short type,
2941 const void *daddr, const void *saddr,
2944 if (!dev->header_ops || !dev->header_ops->create)
2947 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2950 static inline int dev_parse_header(const struct sk_buff *skb,
2951 unsigned char *haddr)
2953 const struct net_device *dev = skb->dev;
2955 if (!dev->header_ops || !dev->header_ops->parse)
2957 return dev->header_ops->parse(skb, haddr);
2960 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2962 const struct net_device *dev = skb->dev;
2964 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2966 return dev->header_ops->parse_protocol(skb);
2969 /* ll_header must have at least hard_header_len allocated */
2970 static inline bool dev_validate_header(const struct net_device *dev,
2971 char *ll_header, int len)
2973 if (likely(len >= dev->hard_header_len))
2975 if (len < dev->min_header_len)
2978 if (capable(CAP_SYS_RAWIO)) {
2979 memset(ll_header + len, 0, dev->hard_header_len - len);
2983 if (dev->header_ops && dev->header_ops->validate)
2984 return dev->header_ops->validate(ll_header, len);
2989 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2991 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2992 static inline int unregister_gifconf(unsigned int family)
2994 return register_gifconf(family, NULL);
2997 #ifdef CONFIG_NET_FLOW_LIMIT
2998 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2999 struct sd_flow_limit {
3001 unsigned int num_buckets;
3002 unsigned int history_head;
3003 u16 history[FLOW_LIMIT_HISTORY];
3007 extern int netdev_flow_limit_table_len;
3008 #endif /* CONFIG_NET_FLOW_LIMIT */
3011 * Incoming packets are placed on per-CPU queues
3013 struct softnet_data {
3014 struct list_head poll_list;
3015 struct sk_buff_head process_queue;
3018 unsigned int processed;
3019 unsigned int time_squeeze;
3020 unsigned int received_rps;
3022 struct softnet_data *rps_ipi_list;
3024 #ifdef CONFIG_NET_FLOW_LIMIT
3025 struct sd_flow_limit __rcu *flow_limit;
3027 struct Qdisc *output_queue;
3028 struct Qdisc **output_queue_tailp;
3029 struct sk_buff *completion_queue;
3030 #ifdef CONFIG_XFRM_OFFLOAD
3031 struct sk_buff_head xfrm_backlog;
3033 /* written and read only by owning cpu: */
3039 /* input_queue_head should be written by cpu owning this struct,
3040 * and only read by other cpus. Worth using a cache line.
3042 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3044 /* Elements below can be accessed between CPUs for RPS/RFS */
3045 call_single_data_t csd ____cacheline_aligned_in_smp;
3046 struct softnet_data *rps_ipi_next;
3048 unsigned int input_queue_tail;
3050 unsigned int dropped;
3051 struct sk_buff_head input_pkt_queue;
3052 struct napi_struct backlog;
3056 static inline void input_queue_head_incr(struct softnet_data *sd)
3059 sd->input_queue_head++;
3063 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3064 unsigned int *qtail)
3067 *qtail = ++sd->input_queue_tail;
3071 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3073 static inline int dev_recursion_level(void)
3075 return this_cpu_read(softnet_data.xmit.recursion);
3078 #define XMIT_RECURSION_LIMIT 10
3079 static inline bool dev_xmit_recursion(void)
3081 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3082 XMIT_RECURSION_LIMIT);
3085 static inline void dev_xmit_recursion_inc(void)
3087 __this_cpu_inc(softnet_data.xmit.recursion);
3090 static inline void dev_xmit_recursion_dec(void)
3092 __this_cpu_dec(softnet_data.xmit.recursion);
3095 void __netif_schedule(struct Qdisc *q);
3096 void netif_schedule_queue(struct netdev_queue *txq);
3098 static inline void netif_tx_schedule_all(struct net_device *dev)
3102 for (i = 0; i < dev->num_tx_queues; i++)
3103 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3106 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3108 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3112 * netif_start_queue - allow transmit
3113 * @dev: network device
3115 * Allow upper layers to call the device hard_start_xmit routine.
3117 static inline void netif_start_queue(struct net_device *dev)
3119 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3122 static inline void netif_tx_start_all_queues(struct net_device *dev)
3126 for (i = 0; i < dev->num_tx_queues; i++) {
3127 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3128 netif_tx_start_queue(txq);
3132 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3135 * netif_wake_queue - restart transmit
3136 * @dev: network device
3138 * Allow upper layers to call the device hard_start_xmit routine.
3139 * Used for flow control when transmit resources are available.
3141 static inline void netif_wake_queue(struct net_device *dev)
3143 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3146 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3150 for (i = 0; i < dev->num_tx_queues; i++) {
3151 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3152 netif_tx_wake_queue(txq);
3156 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3158 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3162 * netif_stop_queue - stop transmitted packets
3163 * @dev: network device
3165 * Stop upper layers calling the device hard_start_xmit routine.
3166 * Used for flow control when transmit resources are unavailable.
3168 static inline void netif_stop_queue(struct net_device *dev)
3170 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3173 void netif_tx_stop_all_queues(struct net_device *dev);
3174 void netdev_update_lockdep_key(struct net_device *dev);
3176 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3178 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3182 * netif_queue_stopped - test if transmit queue is flowblocked
3183 * @dev: network device
3185 * Test if transmit queue on device is currently unable to send.
3187 static inline bool netif_queue_stopped(const struct net_device *dev)
3189 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3192 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3194 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3198 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3200 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3204 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3206 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3210 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3211 * @dev_queue: pointer to transmit queue
3213 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3214 * to give appropriate hint to the CPU.
3216 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3219 prefetchw(&dev_queue->dql.num_queued);
3224 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3225 * @dev_queue: pointer to transmit queue
3227 * BQL enabled drivers might use this helper in their TX completion path,
3228 * to give appropriate hint to the CPU.
3230 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3233 prefetchw(&dev_queue->dql.limit);
3237 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3241 dql_queued(&dev_queue->dql, bytes);
3243 if (likely(dql_avail(&dev_queue->dql) >= 0))
3246 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3249 * The XOFF flag must be set before checking the dql_avail below,
3250 * because in netdev_tx_completed_queue we update the dql_completed
3251 * before checking the XOFF flag.
3255 /* check again in case another CPU has just made room avail */
3256 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3257 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3261 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3262 * that they should not test BQL status themselves.
3263 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3265 * Returns true if the doorbell must be used to kick the NIC.
3267 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3273 dql_queued(&dev_queue->dql, bytes);
3275 return netif_tx_queue_stopped(dev_queue);
3277 netdev_tx_sent_queue(dev_queue, bytes);
3282 * netdev_sent_queue - report the number of bytes queued to hardware
3283 * @dev: network device
3284 * @bytes: number of bytes queued to the hardware device queue
3286 * Report the number of bytes queued for sending/completion to the network
3287 * device hardware queue. @bytes should be a good approximation and should
3288 * exactly match netdev_completed_queue() @bytes
3290 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3292 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3295 static inline bool __netdev_sent_queue(struct net_device *dev,
3299 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3303 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3304 unsigned int pkts, unsigned int bytes)
3307 if (unlikely(!bytes))
3310 dql_completed(&dev_queue->dql, bytes);
3313 * Without the memory barrier there is a small possiblity that
3314 * netdev_tx_sent_queue will miss the update and cause the queue to
3315 * be stopped forever
3319 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3322 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3323 netif_schedule_queue(dev_queue);
3328 * netdev_completed_queue - report bytes and packets completed by device
3329 * @dev: network device
3330 * @pkts: actual number of packets sent over the medium
3331 * @bytes: actual number of bytes sent over the medium
3333 * Report the number of bytes and packets transmitted by the network device
3334 * hardware queue over the physical medium, @bytes must exactly match the
3335 * @bytes amount passed to netdev_sent_queue()
3337 static inline void netdev_completed_queue(struct net_device *dev,
3338 unsigned int pkts, unsigned int bytes)
3340 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3343 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3346 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3352 * netdev_reset_queue - reset the packets and bytes count of a network device
3353 * @dev_queue: network device
3355 * Reset the bytes and packet count of a network device and clear the
3356 * software flow control OFF bit for this network device
3358 static inline void netdev_reset_queue(struct net_device *dev_queue)
3360 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3364 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3365 * @dev: network device
3366 * @queue_index: given tx queue index
3368 * Returns 0 if given tx queue index >= number of device tx queues,
3369 * otherwise returns the originally passed tx queue index.
3371 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3373 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3374 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3375 dev->name, queue_index,
3376 dev->real_num_tx_queues);
3384 * netif_running - test if up
3385 * @dev: network device
3387 * Test if the device has been brought up.
3389 static inline bool netif_running(const struct net_device *dev)
3391 return test_bit(__LINK_STATE_START, &dev->state);
3395 * Routines to manage the subqueues on a device. We only need start,
3396 * stop, and a check if it's stopped. All other device management is
3397 * done at the overall netdevice level.
3398 * Also test the device if we're multiqueue.
3402 * netif_start_subqueue - allow sending packets on subqueue
3403 * @dev: network device
3404 * @queue_index: sub queue index
3406 * Start individual transmit queue of a device with multiple transmit queues.
3408 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3410 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3412 netif_tx_start_queue(txq);
3416 * netif_stop_subqueue - stop sending packets on subqueue
3417 * @dev: network device
3418 * @queue_index: sub queue index
3420 * Stop individual transmit queue of a device with multiple transmit queues.
3422 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3424 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3425 netif_tx_stop_queue(txq);
3429 * netif_subqueue_stopped - test status of subqueue
3430 * @dev: network device
3431 * @queue_index: sub queue index
3433 * Check individual transmit queue of a device with multiple transmit queues.
3435 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3438 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3440 return netif_tx_queue_stopped(txq);
3443 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3444 struct sk_buff *skb)
3446 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3450 * netif_wake_subqueue - allow sending packets on subqueue
3451 * @dev: network device
3452 * @queue_index: sub queue index
3454 * Resume individual transmit queue of a device with multiple transmit queues.
3456 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3458 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3460 netif_tx_wake_queue(txq);
3464 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3466 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3467 u16 index, bool is_rxqs_map);
3470 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3471 * @j: CPU/Rx queue index
3472 * @mask: bitmask of all cpus/rx queues
3473 * @nr_bits: number of bits in the bitmask
3475 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3477 static inline bool netif_attr_test_mask(unsigned long j,
3478 const unsigned long *mask,
3479 unsigned int nr_bits)
3481 cpu_max_bits_warn(j, nr_bits);
3482 return test_bit(j, mask);
3486 * netif_attr_test_online - Test for online CPU/Rx queue
3487 * @j: CPU/Rx queue index
3488 * @online_mask: bitmask for CPUs/Rx queues that are online
3489 * @nr_bits: number of bits in the bitmask
3491 * Returns true if a CPU/Rx queue is online.
3493 static inline bool netif_attr_test_online(unsigned long j,
3494 const unsigned long *online_mask,
3495 unsigned int nr_bits)
3497 cpu_max_bits_warn(j, nr_bits);
3500 return test_bit(j, online_mask);
3502 return (j < nr_bits);
3506 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3507 * @n: CPU/Rx queue index
3508 * @srcp: the cpumask/Rx queue mask pointer
3509 * @nr_bits: number of bits in the bitmask
3511 * Returns >= nr_bits if no further CPUs/Rx queues set.
3513 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3514 unsigned int nr_bits)
3516 /* -1 is a legal arg here. */
3518 cpu_max_bits_warn(n, nr_bits);
3521 return find_next_bit(srcp, nr_bits, n + 1);
3527 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3528 * @n: CPU/Rx queue index
3529 * @src1p: the first CPUs/Rx queues mask pointer
3530 * @src2p: the second CPUs/Rx queues mask pointer
3531 * @nr_bits: number of bits in the bitmask
3533 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3535 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3536 const unsigned long *src2p,
3537 unsigned int nr_bits)
3539 /* -1 is a legal arg here. */
3541 cpu_max_bits_warn(n, nr_bits);
3544 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3546 return find_next_bit(src1p, nr_bits, n + 1);
3548 return find_next_bit(src2p, nr_bits, n + 1);
3553 static inline int netif_set_xps_queue(struct net_device *dev,
3554 const struct cpumask *mask,
3560 static inline int __netif_set_xps_queue(struct net_device *dev,
3561 const unsigned long *mask,
3562 u16 index, bool is_rxqs_map)
3569 * netif_is_multiqueue - test if device has multiple transmit queues
3570 * @dev: network device
3572 * Check if device has multiple transmit queues
3574 static inline bool netif_is_multiqueue(const struct net_device *dev)
3576 return dev->num_tx_queues > 1;
3579 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3582 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3584 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3587 dev->real_num_rx_queues = rxqs;
3592 static inline struct netdev_rx_queue *
3593 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3595 return dev->_rx + rxq;
3599 static inline unsigned int get_netdev_rx_queue_index(
3600 struct netdev_rx_queue *queue)
3602 struct net_device *dev = queue->dev;
3603 int index = queue - dev->_rx;
3605 BUG_ON(index >= dev->num_rx_queues);
3610 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3611 int netif_get_num_default_rss_queues(void);
3613 enum skb_free_reason {
3614 SKB_REASON_CONSUMED,
3618 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3619 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3622 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3623 * interrupt context or with hardware interrupts being disabled.
3624 * (in_irq() || irqs_disabled())
3626 * We provide four helpers that can be used in following contexts :
3628 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3629 * replacing kfree_skb(skb)
3631 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3632 * Typically used in place of consume_skb(skb) in TX completion path
3634 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3635 * replacing kfree_skb(skb)
3637 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3638 * and consumed a packet. Used in place of consume_skb(skb)
3640 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3642 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3645 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3647 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3650 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3652 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3655 static inline void dev_consume_skb_any(struct sk_buff *skb)
3657 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3660 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3661 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3662 int netif_rx(struct sk_buff *skb);
3663 int netif_rx_ni(struct sk_buff *skb);
3664 int netif_receive_skb(struct sk_buff *skb);
3665 int netif_receive_skb_core(struct sk_buff *skb);
3666 void netif_receive_skb_list(struct list_head *head);
3667 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3668 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3669 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3670 gro_result_t napi_gro_frags(struct napi_struct *napi);
3671 struct packet_offload *gro_find_receive_by_type(__be16 type);
3672 struct packet_offload *gro_find_complete_by_type(__be16 type);
3674 static inline void napi_free_frags(struct napi_struct *napi)
3676 kfree_skb(napi->skb);
3680 bool netdev_is_rx_handler_busy(struct net_device *dev);
3681 int netdev_rx_handler_register(struct net_device *dev,
3682 rx_handler_func_t *rx_handler,
3683 void *rx_handler_data);
3684 void netdev_rx_handler_unregister(struct net_device *dev);
3686 bool dev_valid_name(const char *name);
3687 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3688 bool *need_copyout);
3689 int dev_ifconf(struct net *net, struct ifconf *, int);
3690 int dev_ethtool(struct net *net, struct ifreq *);
3691 unsigned int dev_get_flags(const struct net_device *);
3692 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3693 struct netlink_ext_ack *extack);
3694 int dev_change_flags(struct net_device *dev, unsigned int flags,
3695 struct netlink_ext_ack *extack);
3696 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3697 unsigned int gchanges);
3698 int dev_change_name(struct net_device *, const char *);
3699 int dev_set_alias(struct net_device *, const char *, size_t);
3700 int dev_get_alias(const struct net_device *, char *, size_t);
3701 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3702 int __dev_set_mtu(struct net_device *, int);
3703 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3704 struct netlink_ext_ack *extack);
3705 int dev_set_mtu(struct net_device *, int);
3706 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3707 void dev_set_group(struct net_device *, int);
3708 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3709 struct netlink_ext_ack *extack);
3710 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3711 struct netlink_ext_ack *extack);
3712 int dev_change_carrier(struct net_device *, bool new_carrier);
3713 int dev_get_phys_port_id(struct net_device *dev,
3714 struct netdev_phys_item_id *ppid);
3715 int dev_get_phys_port_name(struct net_device *dev,
3716 char *name, size_t len);
3717 int dev_get_port_parent_id(struct net_device *dev,
3718 struct netdev_phys_item_id *ppid, bool recurse);
3719 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3720 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3721 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3722 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3723 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3724 struct netdev_queue *txq, int *ret);
3726 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3727 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3729 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3730 enum bpf_netdev_command cmd);
3731 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3733 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3734 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3735 bool is_skb_forwardable(const struct net_device *dev,
3736 const struct sk_buff *skb);
3738 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3739 struct sk_buff *skb)
3741 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3742 unlikely(!is_skb_forwardable(dev, skb))) {
3743 atomic_long_inc(&dev->rx_dropped);
3748 skb_scrub_packet(skb, true);
3753 bool dev_nit_active(struct net_device *dev);
3754 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3756 extern int netdev_budget;
3757 extern unsigned int netdev_budget_usecs;
3759 /* Called by rtnetlink.c:rtnl_unlock() */
3760 void netdev_run_todo(void);
3763 * dev_put - release reference to device
3764 * @dev: network device
3766 * Release reference to device to allow it to be freed.
3768 static inline void dev_put(struct net_device *dev)
3770 this_cpu_dec(*dev->pcpu_refcnt);
3774 * dev_hold - get reference to device
3775 * @dev: network device
3777 * Hold reference to device to keep it from being freed.
3779 static inline void dev_hold(struct net_device *dev)
3781 this_cpu_inc(*dev->pcpu_refcnt);
3784 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3785 * and _off may be called from IRQ context, but it is caller
3786 * who is responsible for serialization of these calls.
3788 * The name carrier is inappropriate, these functions should really be
3789 * called netif_lowerlayer_*() because they represent the state of any
3790 * kind of lower layer not just hardware media.
3793 void linkwatch_init_dev(struct net_device *dev);
3794 void linkwatch_fire_event(struct net_device *dev);
3795 void linkwatch_forget_dev(struct net_device *dev);
3798 * netif_carrier_ok - test if carrier present
3799 * @dev: network device
3801 * Check if carrier is present on device
3803 static inline bool netif_carrier_ok(const struct net_device *dev)
3805 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3808 unsigned long dev_trans_start(struct net_device *dev);
3810 void __netdev_watchdog_up(struct net_device *dev);
3812 void netif_carrier_on(struct net_device *dev);
3814 void netif_carrier_off(struct net_device *dev);
3817 * netif_dormant_on - mark device as dormant.
3818 * @dev: network device
3820 * Mark device as dormant (as per RFC2863).
3822 * The dormant state indicates that the relevant interface is not
3823 * actually in a condition to pass packets (i.e., it is not 'up') but is
3824 * in a "pending" state, waiting for some external event. For "on-
3825 * demand" interfaces, this new state identifies the situation where the
3826 * interface is waiting for events to place it in the up state.
3828 static inline void netif_dormant_on(struct net_device *dev)
3830 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3831 linkwatch_fire_event(dev);
3835 * netif_dormant_off - set device as not dormant.
3836 * @dev: network device
3838 * Device is not in dormant state.
3840 static inline void netif_dormant_off(struct net_device *dev)
3842 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3843 linkwatch_fire_event(dev);
3847 * netif_dormant - test if device is dormant
3848 * @dev: network device
3850 * Check if device is dormant.
3852 static inline bool netif_dormant(const struct net_device *dev)
3854 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3859 * netif_oper_up - test if device is operational
3860 * @dev: network device
3862 * Check if carrier is operational
3864 static inline bool netif_oper_up(const struct net_device *dev)
3866 return (dev->operstate == IF_OPER_UP ||
3867 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3871 * netif_device_present - is device available or removed
3872 * @dev: network device
3874 * Check if device has not been removed from system.
3876 static inline bool netif_device_present(struct net_device *dev)
3878 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3881 void netif_device_detach(struct net_device *dev);
3883 void netif_device_attach(struct net_device *dev);
3886 * Network interface message level settings
3890 NETIF_MSG_DRV = 0x0001,
3891 NETIF_MSG_PROBE = 0x0002,
3892 NETIF_MSG_LINK = 0x0004,
3893 NETIF_MSG_TIMER = 0x0008,
3894 NETIF_MSG_IFDOWN = 0x0010,
3895 NETIF_MSG_IFUP = 0x0020,
3896 NETIF_MSG_RX_ERR = 0x0040,
3897 NETIF_MSG_TX_ERR = 0x0080,
3898 NETIF_MSG_TX_QUEUED = 0x0100,
3899 NETIF_MSG_INTR = 0x0200,
3900 NETIF_MSG_TX_DONE = 0x0400,
3901 NETIF_MSG_RX_STATUS = 0x0800,
3902 NETIF_MSG_PKTDATA = 0x1000,
3903 NETIF_MSG_HW = 0x2000,
3904 NETIF_MSG_WOL = 0x4000,
3907 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3908 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3909 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3910 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3911 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3912 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3913 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3914 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3915 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3916 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3917 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3918 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3919 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3920 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3921 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3923 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3926 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3927 return default_msg_enable_bits;
3928 if (debug_value == 0) /* no output */
3930 /* set low N bits */
3931 return (1U << debug_value) - 1;
3934 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3936 spin_lock(&txq->_xmit_lock);
3937 txq->xmit_lock_owner = cpu;
3940 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3942 __acquire(&txq->_xmit_lock);
3946 static inline void __netif_tx_release(struct netdev_queue *txq)
3948 __release(&txq->_xmit_lock);
3951 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3953 spin_lock_bh(&txq->_xmit_lock);
3954 txq->xmit_lock_owner = smp_processor_id();
3957 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3959 bool ok = spin_trylock(&txq->_xmit_lock);
3961 txq->xmit_lock_owner = smp_processor_id();
3965 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3967 txq->xmit_lock_owner = -1;
3968 spin_unlock(&txq->_xmit_lock);
3971 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3973 txq->xmit_lock_owner = -1;
3974 spin_unlock_bh(&txq->_xmit_lock);
3977 static inline void txq_trans_update(struct netdev_queue *txq)
3979 if (txq->xmit_lock_owner != -1)
3980 txq->trans_start = jiffies;
3983 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3984 static inline void netif_trans_update(struct net_device *dev)
3986 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3988 if (txq->trans_start != jiffies)
3989 txq->trans_start = jiffies;
3993 * netif_tx_lock - grab network device transmit lock
3994 * @dev: network device
3996 * Get network device transmit lock
3998 static inline void netif_tx_lock(struct net_device *dev)
4003 spin_lock(&dev->tx_global_lock);
4004 cpu = smp_processor_id();
4005 for (i = 0; i < dev->num_tx_queues; i++) {
4006 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4008 /* We are the only thread of execution doing a
4009 * freeze, but we have to grab the _xmit_lock in
4010 * order to synchronize with threads which are in
4011 * the ->hard_start_xmit() handler and already
4012 * checked the frozen bit.
4014 __netif_tx_lock(txq, cpu);
4015 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
4016 __netif_tx_unlock(txq);
4020 static inline void netif_tx_lock_bh(struct net_device *dev)
4026 static inline void netif_tx_unlock(struct net_device *dev)
4030 for (i = 0; i < dev->num_tx_queues; i++) {
4031 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4033 /* No need to grab the _xmit_lock here. If the
4034 * queue is not stopped for another reason, we
4037 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4038 netif_schedule_queue(txq);
4040 spin_unlock(&dev->tx_global_lock);
4043 static inline void netif_tx_unlock_bh(struct net_device *dev)
4045 netif_tx_unlock(dev);
4049 #define HARD_TX_LOCK(dev, txq, cpu) { \
4050 if ((dev->features & NETIF_F_LLTX) == 0) { \
4051 __netif_tx_lock(txq, cpu); \
4053 __netif_tx_acquire(txq); \
4057 #define HARD_TX_TRYLOCK(dev, txq) \
4058 (((dev->features & NETIF_F_LLTX) == 0) ? \
4059 __netif_tx_trylock(txq) : \
4060 __netif_tx_acquire(txq))
4062 #define HARD_TX_UNLOCK(dev, txq) { \
4063 if ((dev->features & NETIF_F_LLTX) == 0) { \
4064 __netif_tx_unlock(txq); \
4066 __netif_tx_release(txq); \
4070 static inline void netif_tx_disable(struct net_device *dev)
4076 cpu = smp_processor_id();
4077 for (i = 0; i < dev->num_tx_queues; i++) {
4078 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4080 __netif_tx_lock(txq, cpu);
4081 netif_tx_stop_queue(txq);
4082 __netif_tx_unlock(txq);
4087 static inline void netif_addr_lock(struct net_device *dev)
4089 spin_lock(&dev->addr_list_lock);
4092 static inline void netif_addr_lock_bh(struct net_device *dev)
4094 spin_lock_bh(&dev->addr_list_lock);
4097 static inline void netif_addr_unlock(struct net_device *dev)
4099 spin_unlock(&dev->addr_list_lock);
4102 static inline void netif_addr_unlock_bh(struct net_device *dev)
4104 spin_unlock_bh(&dev->addr_list_lock);
4108 * dev_addrs walker. Should be used only for read access. Call with
4109 * rcu_read_lock held.
4111 #define for_each_dev_addr(dev, ha) \
4112 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4114 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4116 void ether_setup(struct net_device *dev);
4118 /* Support for loadable net-drivers */
4119 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4120 unsigned char name_assign_type,
4121 void (*setup)(struct net_device *),
4122 unsigned int txqs, unsigned int rxqs);
4123 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4124 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4126 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4127 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4130 int register_netdev(struct net_device *dev);
4131 void unregister_netdev(struct net_device *dev);
4133 /* General hardware address lists handling functions */
4134 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4135 struct netdev_hw_addr_list *from_list, int addr_len);
4136 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4137 struct netdev_hw_addr_list *from_list, int addr_len);
4138 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4139 struct net_device *dev,
4140 int (*sync)(struct net_device *, const unsigned char *),
4141 int (*unsync)(struct net_device *,
4142 const unsigned char *));
4143 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4144 struct net_device *dev,
4145 int (*sync)(struct net_device *,
4146 const unsigned char *, int),
4147 int (*unsync)(struct net_device *,
4148 const unsigned char *, int));
4149 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4150 struct net_device *dev,
4151 int (*unsync)(struct net_device *,
4152 const unsigned char *, int));
4153 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4154 struct net_device *dev,
4155 int (*unsync)(struct net_device *,
4156 const unsigned char *));
4157 void __hw_addr_init(struct netdev_hw_addr_list *list);
4159 /* Functions used for device addresses handling */
4160 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4161 unsigned char addr_type);
4162 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4163 unsigned char addr_type);
4164 void dev_addr_flush(struct net_device *dev);
4165 int dev_addr_init(struct net_device *dev);
4167 /* Functions used for unicast addresses handling */
4168 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4169 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4170 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4171 int dev_uc_sync(struct net_device *to, struct net_device *from);
4172 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4173 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4174 void dev_uc_flush(struct net_device *dev);
4175 void dev_uc_init(struct net_device *dev);
4178 * __dev_uc_sync - Synchonize device's unicast list
4179 * @dev: device to sync
4180 * @sync: function to call if address should be added
4181 * @unsync: function to call if address should be removed
4183 * Add newly added addresses to the interface, and release
4184 * addresses that have been deleted.
4186 static inline int __dev_uc_sync(struct net_device *dev,
4187 int (*sync)(struct net_device *,
4188 const unsigned char *),
4189 int (*unsync)(struct net_device *,
4190 const unsigned char *))
4192 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4196 * __dev_uc_unsync - Remove synchronized addresses from device
4197 * @dev: device to sync
4198 * @unsync: function to call if address should be removed
4200 * Remove all addresses that were added to the device by dev_uc_sync().
4202 static inline void __dev_uc_unsync(struct net_device *dev,
4203 int (*unsync)(struct net_device *,
4204 const unsigned char *))
4206 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4209 /* Functions used for multicast addresses handling */
4210 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4211 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4212 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4213 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4214 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4215 int dev_mc_sync(struct net_device *to, struct net_device *from);
4216 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4217 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4218 void dev_mc_flush(struct net_device *dev);
4219 void dev_mc_init(struct net_device *dev);
4222 * __dev_mc_sync - Synchonize device's multicast list
4223 * @dev: device to sync
4224 * @sync: function to call if address should be added
4225 * @unsync: function to call if address should be removed
4227 * Add newly added addresses to the interface, and release
4228 * addresses that have been deleted.
4230 static inline int __dev_mc_sync(struct net_device *dev,
4231 int (*sync)(struct net_device *,
4232 const unsigned char *),
4233 int (*unsync)(struct net_device *,
4234 const unsigned char *))
4236 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4240 * __dev_mc_unsync - Remove synchronized addresses from device
4241 * @dev: device to sync
4242 * @unsync: function to call if address should be removed
4244 * Remove all addresses that were added to the device by dev_mc_sync().
4246 static inline void __dev_mc_unsync(struct net_device *dev,
4247 int (*unsync)(struct net_device *,
4248 const unsigned char *))
4250 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4253 /* Functions used for secondary unicast and multicast support */
4254 void dev_set_rx_mode(struct net_device *dev);
4255 void __dev_set_rx_mode(struct net_device *dev);
4256 int dev_set_promiscuity(struct net_device *dev, int inc);
4257 int dev_set_allmulti(struct net_device *dev, int inc);
4258 void netdev_state_change(struct net_device *dev);
4259 void netdev_notify_peers(struct net_device *dev);
4260 void netdev_features_change(struct net_device *dev);
4261 /* Load a device via the kmod */
4262 void dev_load(struct net *net, const char *name);
4263 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4264 struct rtnl_link_stats64 *storage);
4265 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4266 const struct net_device_stats *netdev_stats);
4268 extern int netdev_max_backlog;
4269 extern int netdev_tstamp_prequeue;
4270 extern int weight_p;
4271 extern int dev_weight_rx_bias;
4272 extern int dev_weight_tx_bias;
4273 extern int dev_rx_weight;
4274 extern int dev_tx_weight;
4275 extern int gro_normal_batch;
4277 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4278 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4279 struct list_head **iter);
4280 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4281 struct list_head **iter);
4283 /* iterate through upper list, must be called under RCU read lock */
4284 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4285 for (iter = &(dev)->adj_list.upper, \
4286 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4288 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4290 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4291 int (*fn)(struct net_device *upper_dev,
4295 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4296 struct net_device *upper_dev);
4298 bool netdev_has_any_upper_dev(struct net_device *dev);
4300 void *netdev_lower_get_next_private(struct net_device *dev,
4301 struct list_head **iter);
4302 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4303 struct list_head **iter);
4305 #define netdev_for_each_lower_private(dev, priv, iter) \
4306 for (iter = (dev)->adj_list.lower.next, \
4307 priv = netdev_lower_get_next_private(dev, &(iter)); \
4309 priv = netdev_lower_get_next_private(dev, &(iter)))
4311 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4312 for (iter = &(dev)->adj_list.lower, \
4313 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4315 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4317 void *netdev_lower_get_next(struct net_device *dev,
4318 struct list_head **iter);
4320 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4321 for (iter = (dev)->adj_list.lower.next, \
4322 ldev = netdev_lower_get_next(dev, &(iter)); \
4324 ldev = netdev_lower_get_next(dev, &(iter)))
4326 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4327 struct list_head **iter);
4328 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4329 struct list_head **iter);
4331 int netdev_walk_all_lower_dev(struct net_device *dev,
4332 int (*fn)(struct net_device *lower_dev,
4335 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4336 int (*fn)(struct net_device *lower_dev,
4340 void *netdev_adjacent_get_private(struct list_head *adj_list);
4341 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4342 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4343 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4344 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4345 struct netlink_ext_ack *extack);
4346 int netdev_master_upper_dev_link(struct net_device *dev,
4347 struct net_device *upper_dev,
4348 void *upper_priv, void *upper_info,
4349 struct netlink_ext_ack *extack);
4350 void netdev_upper_dev_unlink(struct net_device *dev,
4351 struct net_device *upper_dev);
4352 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4353 struct net_device *new_dev,
4354 struct net_device *dev,
4355 struct netlink_ext_ack *extack);
4356 void netdev_adjacent_change_commit(struct net_device *old_dev,
4357 struct net_device *new_dev,
4358 struct net_device *dev);
4359 void netdev_adjacent_change_abort(struct net_device *old_dev,
4360 struct net_device *new_dev,
4361 struct net_device *dev);
4362 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4363 void *netdev_lower_dev_get_private(struct net_device *dev,
4364 struct net_device *lower_dev);
4365 void netdev_lower_state_changed(struct net_device *lower_dev,
4366 void *lower_state_info);
4368 /* RSS keys are 40 or 52 bytes long */
4369 #define NETDEV_RSS_KEY_LEN 52
4370 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4371 void netdev_rss_key_fill(void *buffer, size_t len);
4373 int skb_checksum_help(struct sk_buff *skb);
4374 int skb_crc32c_csum_help(struct sk_buff *skb);
4375 int skb_csum_hwoffload_help(struct sk_buff *skb,
4376 const netdev_features_t features);
4378 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4379 netdev_features_t features, bool tx_path);
4380 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4381 netdev_features_t features);
4383 struct netdev_bonding_info {
4388 struct netdev_notifier_bonding_info {
4389 struct netdev_notifier_info info; /* must be first */
4390 struct netdev_bonding_info bonding_info;
4393 void netdev_bonding_info_change(struct net_device *dev,
4394 struct netdev_bonding_info *bonding_info);
4397 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4399 return __skb_gso_segment(skb, features, true);
4401 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4403 static inline bool can_checksum_protocol(netdev_features_t features,
4406 if (protocol == htons(ETH_P_FCOE))
4407 return !!(features & NETIF_F_FCOE_CRC);
4409 /* Assume this is an IP checksum (not SCTP CRC) */
4411 if (features & NETIF_F_HW_CSUM) {
4412 /* Can checksum everything */
4417 case htons(ETH_P_IP):
4418 return !!(features & NETIF_F_IP_CSUM);
4419 case htons(ETH_P_IPV6):
4420 return !!(features & NETIF_F_IPV6_CSUM);
4427 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4429 static inline void netdev_rx_csum_fault(struct net_device *dev,
4430 struct sk_buff *skb)
4434 /* rx skb timestamps */
4435 void net_enable_timestamp(void);
4436 void net_disable_timestamp(void);
4438 #ifdef CONFIG_PROC_FS
4439 int __init dev_proc_init(void);
4441 #define dev_proc_init() 0
4444 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4445 struct sk_buff *skb, struct net_device *dev,
4448 __this_cpu_write(softnet_data.xmit.more, more);
4449 return ops->ndo_start_xmit(skb, dev);
4452 static inline bool netdev_xmit_more(void)
4454 return __this_cpu_read(softnet_data.xmit.more);
4457 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4458 struct netdev_queue *txq, bool more)
4460 const struct net_device_ops *ops = dev->netdev_ops;
4463 rc = __netdev_start_xmit(ops, skb, dev, more);
4464 if (rc == NETDEV_TX_OK)
4465 txq_trans_update(txq);
4470 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4472 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4475 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4477 return netdev_class_create_file_ns(class_attr, NULL);
4480 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4482 netdev_class_remove_file_ns(class_attr, NULL);
4485 extern const struct kobj_ns_type_operations net_ns_type_operations;
4487 const char *netdev_drivername(const struct net_device *dev);
4489 void linkwatch_run_queue(void);
4491 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4492 netdev_features_t f2)
4494 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4495 if (f1 & NETIF_F_HW_CSUM)
4496 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4498 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4504 static inline netdev_features_t netdev_get_wanted_features(
4505 struct net_device *dev)
4507 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4509 netdev_features_t netdev_increment_features(netdev_features_t all,
4510 netdev_features_t one, netdev_features_t mask);
4512 /* Allow TSO being used on stacked device :
4513 * Performing the GSO segmentation before last device
4514 * is a performance improvement.
4516 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4517 netdev_features_t mask)
4519 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4522 int __netdev_update_features(struct net_device *dev);
4523 void netdev_update_features(struct net_device *dev);
4524 void netdev_change_features(struct net_device *dev);
4526 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4527 struct net_device *dev);
4529 netdev_features_t passthru_features_check(struct sk_buff *skb,
4530 struct net_device *dev,
4531 netdev_features_t features);
4532 netdev_features_t netif_skb_features(struct sk_buff *skb);
4534 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4536 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4538 /* check flags correspondence */
4539 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4540 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4541 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4542 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4543 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4544 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4545 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4546 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4547 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4548 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4549 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4550 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4551 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4552 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4553 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4554 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4555 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4556 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4558 return (features & feature) == feature;
4561 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4563 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4564 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4567 static inline bool netif_needs_gso(struct sk_buff *skb,
4568 netdev_features_t features)
4570 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4571 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4572 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4575 static inline void netif_set_gso_max_size(struct net_device *dev,
4578 dev->gso_max_size = size;
4581 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4582 int pulled_hlen, u16 mac_offset,
4585 skb->protocol = protocol;
4586 skb->encapsulation = 1;
4587 skb_push(skb, pulled_hlen);
4588 skb_reset_transport_header(skb);
4589 skb->mac_header = mac_offset;
4590 skb->network_header = skb->mac_header + mac_len;
4591 skb->mac_len = mac_len;
4594 static inline bool netif_is_macsec(const struct net_device *dev)
4596 return dev->priv_flags & IFF_MACSEC;
4599 static inline bool netif_is_macvlan(const struct net_device *dev)
4601 return dev->priv_flags & IFF_MACVLAN;
4604 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4606 return dev->priv_flags & IFF_MACVLAN_PORT;
4609 static inline bool netif_is_bond_master(const struct net_device *dev)
4611 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4614 static inline bool netif_is_bond_slave(const struct net_device *dev)
4616 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4619 static inline bool netif_supports_nofcs(struct net_device *dev)
4621 return dev->priv_flags & IFF_SUPP_NOFCS;
4624 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4626 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4629 static inline bool netif_is_l3_master(const struct net_device *dev)
4631 return dev->priv_flags & IFF_L3MDEV_MASTER;
4634 static inline bool netif_is_l3_slave(const struct net_device *dev)
4636 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4639 static inline bool netif_is_bridge_master(const struct net_device *dev)
4641 return dev->priv_flags & IFF_EBRIDGE;
4644 static inline bool netif_is_bridge_port(const struct net_device *dev)
4646 return dev->priv_flags & IFF_BRIDGE_PORT;
4649 static inline bool netif_is_ovs_master(const struct net_device *dev)
4651 return dev->priv_flags & IFF_OPENVSWITCH;
4654 static inline bool netif_is_ovs_port(const struct net_device *dev)
4656 return dev->priv_flags & IFF_OVS_DATAPATH;
4659 static inline bool netif_is_team_master(const struct net_device *dev)
4661 return dev->priv_flags & IFF_TEAM;
4664 static inline bool netif_is_team_port(const struct net_device *dev)
4666 return dev->priv_flags & IFF_TEAM_PORT;
4669 static inline bool netif_is_lag_master(const struct net_device *dev)
4671 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4674 static inline bool netif_is_lag_port(const struct net_device *dev)
4676 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4679 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4681 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4684 static inline bool netif_is_failover(const struct net_device *dev)
4686 return dev->priv_flags & IFF_FAILOVER;
4689 static inline bool netif_is_failover_slave(const struct net_device *dev)
4691 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4694 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4695 static inline void netif_keep_dst(struct net_device *dev)
4697 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4700 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4701 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4703 /* TODO: reserve and use an additional IFF bit, if we get more users */
4704 return dev->priv_flags & IFF_MACSEC;
4707 extern struct pernet_operations __net_initdata loopback_net_ops;
4709 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4711 /* netdev_printk helpers, similar to dev_printk */
4713 static inline const char *netdev_name(const struct net_device *dev)
4715 if (!dev->name[0] || strchr(dev->name, '%'))
4716 return "(unnamed net_device)";
4720 static inline bool netdev_unregistering(const struct net_device *dev)
4722 return dev->reg_state == NETREG_UNREGISTERING;
4725 static inline const char *netdev_reg_state(const struct net_device *dev)
4727 switch (dev->reg_state) {
4728 case NETREG_UNINITIALIZED: return " (uninitialized)";
4729 case NETREG_REGISTERED: return "";
4730 case NETREG_UNREGISTERING: return " (unregistering)";
4731 case NETREG_UNREGISTERED: return " (unregistered)";
4732 case NETREG_RELEASED: return " (released)";
4733 case NETREG_DUMMY: return " (dummy)";
4736 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4737 return " (unknown)";
4740 __printf(3, 4) __cold
4741 void netdev_printk(const char *level, const struct net_device *dev,
4742 const char *format, ...);
4743 __printf(2, 3) __cold
4744 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4745 __printf(2, 3) __cold
4746 void netdev_alert(const struct net_device *dev, const char *format, ...);
4747 __printf(2, 3) __cold
4748 void netdev_crit(const struct net_device *dev, const char *format, ...);
4749 __printf(2, 3) __cold
4750 void netdev_err(const struct net_device *dev, const char *format, ...);
4751 __printf(2, 3) __cold
4752 void netdev_warn(const struct net_device *dev, const char *format, ...);
4753 __printf(2, 3) __cold
4754 void netdev_notice(const struct net_device *dev, const char *format, ...);
4755 __printf(2, 3) __cold
4756 void netdev_info(const struct net_device *dev, const char *format, ...);
4758 #define netdev_level_once(level, dev, fmt, ...) \
4760 static bool __print_once __read_mostly; \
4762 if (!__print_once) { \
4763 __print_once = true; \
4764 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4768 #define netdev_emerg_once(dev, fmt, ...) \
4769 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4770 #define netdev_alert_once(dev, fmt, ...) \
4771 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4772 #define netdev_crit_once(dev, fmt, ...) \
4773 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4774 #define netdev_err_once(dev, fmt, ...) \
4775 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4776 #define netdev_warn_once(dev, fmt, ...) \
4777 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4778 #define netdev_notice_once(dev, fmt, ...) \
4779 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4780 #define netdev_info_once(dev, fmt, ...) \
4781 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4783 #define MODULE_ALIAS_NETDEV(device) \
4784 MODULE_ALIAS("netdev-" device)
4786 #if defined(CONFIG_DYNAMIC_DEBUG)
4787 #define netdev_dbg(__dev, format, args...) \
4789 dynamic_netdev_dbg(__dev, format, ##args); \
4791 #elif defined(DEBUG)
4792 #define netdev_dbg(__dev, format, args...) \
4793 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4795 #define netdev_dbg(__dev, format, args...) \
4798 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4802 #if defined(VERBOSE_DEBUG)
4803 #define netdev_vdbg netdev_dbg
4806 #define netdev_vdbg(dev, format, args...) \
4809 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4815 * netdev_WARN() acts like dev_printk(), but with the key difference
4816 * of using a WARN/WARN_ON to get the message out, including the
4817 * file/line information and a backtrace.
4819 #define netdev_WARN(dev, format, args...) \
4820 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4821 netdev_reg_state(dev), ##args)
4823 #define netdev_WARN_ONCE(dev, format, args...) \
4824 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4825 netdev_reg_state(dev), ##args)
4827 /* netif printk helpers, similar to netdev_printk */
4829 #define netif_printk(priv, type, level, dev, fmt, args...) \
4831 if (netif_msg_##type(priv)) \
4832 netdev_printk(level, (dev), fmt, ##args); \
4835 #define netif_level(level, priv, type, dev, fmt, args...) \
4837 if (netif_msg_##type(priv)) \
4838 netdev_##level(dev, fmt, ##args); \
4841 #define netif_emerg(priv, type, dev, fmt, args...) \
4842 netif_level(emerg, priv, type, dev, fmt, ##args)
4843 #define netif_alert(priv, type, dev, fmt, args...) \
4844 netif_level(alert, priv, type, dev, fmt, ##args)
4845 #define netif_crit(priv, type, dev, fmt, args...) \
4846 netif_level(crit, priv, type, dev, fmt, ##args)
4847 #define netif_err(priv, type, dev, fmt, args...) \
4848 netif_level(err, priv, type, dev, fmt, ##args)
4849 #define netif_warn(priv, type, dev, fmt, args...) \
4850 netif_level(warn, priv, type, dev, fmt, ##args)
4851 #define netif_notice(priv, type, dev, fmt, args...) \
4852 netif_level(notice, priv, type, dev, fmt, ##args)
4853 #define netif_info(priv, type, dev, fmt, args...) \
4854 netif_level(info, priv, type, dev, fmt, ##args)
4856 #if defined(CONFIG_DYNAMIC_DEBUG)
4857 #define netif_dbg(priv, type, netdev, format, args...) \
4859 if (netif_msg_##type(priv)) \
4860 dynamic_netdev_dbg(netdev, format, ##args); \
4862 #elif defined(DEBUG)
4863 #define netif_dbg(priv, type, dev, format, args...) \
4864 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4866 #define netif_dbg(priv, type, dev, format, args...) \
4869 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4874 /* if @cond then downgrade to debug, else print at @level */
4875 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4878 netif_dbg(priv, type, netdev, fmt, ##args); \
4880 netif_ ## level(priv, type, netdev, fmt, ##args); \
4883 #if defined(VERBOSE_DEBUG)
4884 #define netif_vdbg netif_dbg
4886 #define netif_vdbg(priv, type, dev, format, args...) \
4889 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4895 * The list of packet types we will receive (as opposed to discard)
4896 * and the routines to invoke.
4898 * Why 16. Because with 16 the only overlap we get on a hash of the
4899 * low nibble of the protocol value is RARP/SNAP/X.25.
4913 #define PTYPE_HASH_SIZE (16)
4914 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4916 extern struct net_device *blackhole_netdev;
4918 #endif /* _LINUX_NETDEVICE_H */