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,
853 /* These structures hold the attributes of bpf state that are being passed
854 * to the netdevice through the bpf op.
856 enum bpf_netdev_command {
857 /* Set or clear a bpf program used in the earliest stages of packet
858 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
859 * is responsible for calling bpf_prog_put on any old progs that are
860 * stored. In case of error, the callee need not release the new prog
861 * reference, but on success it takes ownership and must bpf_prog_put
862 * when it is no longer used.
868 /* BPF program for offload callbacks, invoked at program load time. */
869 BPF_OFFLOAD_MAP_ALLOC,
870 BPF_OFFLOAD_MAP_FREE,
874 struct bpf_prog_offload_ops;
875 struct netlink_ext_ack;
879 enum bpf_netdev_command command;
884 struct bpf_prog *prog;
885 struct netlink_ext_ack *extack;
887 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
890 /* flags with which program was installed */
893 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
895 struct bpf_offloaded_map *offmap;
897 /* XDP_SETUP_XSK_UMEM */
899 struct xdp_umem *umem;
905 /* Flags for ndo_xsk_wakeup. */
906 #define XDP_WAKEUP_RX (1 << 0)
907 #define XDP_WAKEUP_TX (1 << 1)
909 #ifdef CONFIG_XFRM_OFFLOAD
911 int (*xdo_dev_state_add) (struct xfrm_state *x);
912 void (*xdo_dev_state_delete) (struct xfrm_state *x);
913 void (*xdo_dev_state_free) (struct xfrm_state *x);
914 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
915 struct xfrm_state *x);
916 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
921 struct rcu_head rcuhead;
928 struct netdev_name_node {
929 struct hlist_node hlist;
930 struct list_head list;
931 struct net_device *dev;
935 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
936 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
939 * This structure defines the management hooks for network devices.
940 * The following hooks can be defined; unless noted otherwise, they are
941 * optional and can be filled with a null pointer.
943 * int (*ndo_init)(struct net_device *dev);
944 * This function is called once when a network device is registered.
945 * The network device can use this for any late stage initialization
946 * or semantic validation. It can fail with an error code which will
947 * be propagated back to register_netdev.
949 * void (*ndo_uninit)(struct net_device *dev);
950 * This function is called when device is unregistered or when registration
951 * fails. It is not called if init fails.
953 * int (*ndo_open)(struct net_device *dev);
954 * This function is called when a network device transitions to the up
957 * int (*ndo_stop)(struct net_device *dev);
958 * This function is called when a network device transitions to the down
961 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
962 * struct net_device *dev);
963 * Called when a packet needs to be transmitted.
964 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
965 * the queue before that can happen; it's for obsolete devices and weird
966 * corner cases, but the stack really does a non-trivial amount
967 * of useless work if you return NETDEV_TX_BUSY.
968 * Required; cannot be NULL.
970 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
971 * struct net_device *dev
972 * netdev_features_t features);
973 * Called by core transmit path to determine if device is capable of
974 * performing offload operations on a given packet. This is to give
975 * the device an opportunity to implement any restrictions that cannot
976 * be otherwise expressed by feature flags. The check is called with
977 * the set of features that the stack has calculated and it returns
978 * those the driver believes to be appropriate.
980 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
981 * struct net_device *sb_dev);
982 * Called to decide which queue to use when device supports multiple
985 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
986 * This function is called to allow device receiver to make
987 * changes to configuration when multicast or promiscuous is enabled.
989 * void (*ndo_set_rx_mode)(struct net_device *dev);
990 * This function is called device changes address list filtering.
991 * If driver handles unicast address filtering, it should set
992 * IFF_UNICAST_FLT in its priv_flags.
994 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
995 * This function is called when the Media Access Control address
996 * needs to be changed. If this interface is not defined, the
997 * MAC address can not be changed.
999 * int (*ndo_validate_addr)(struct net_device *dev);
1000 * Test if Media Access Control address is valid for the device.
1002 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1003 * Called when a user requests an ioctl which can't be handled by
1004 * the generic interface code. If not defined ioctls return
1005 * not supported error code.
1007 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1008 * Used to set network devices bus interface parameters. This interface
1009 * is retained for legacy reasons; new devices should use the bus
1010 * interface (PCI) for low level management.
1012 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1013 * Called when a user wants to change the Maximum Transfer Unit
1016 * void (*ndo_tx_timeout)(struct net_device *dev);
1017 * Callback used when the transmitter has not made any progress
1018 * for dev->watchdog ticks.
1020 * void (*ndo_get_stats64)(struct net_device *dev,
1021 * struct rtnl_link_stats64 *storage);
1022 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1023 * Called when a user wants to get the network device usage
1024 * statistics. Drivers must do one of the following:
1025 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1026 * rtnl_link_stats64 structure passed by the caller.
1027 * 2. Define @ndo_get_stats to update a net_device_stats structure
1028 * (which should normally be dev->stats) and return a pointer to
1029 * it. The structure may be changed asynchronously only if each
1030 * field is written atomically.
1031 * 3. Update dev->stats asynchronously and atomically, and define
1032 * neither operation.
1034 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1035 * Return true if this device supports offload stats of this attr_id.
1037 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1039 * Get statistics for offload operations by attr_id. Write it into the
1040 * attr_data pointer.
1042 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1043 * If device supports VLAN filtering this function is called when a
1044 * VLAN id is registered.
1046 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1047 * If device supports VLAN filtering this function is called when a
1048 * VLAN id is unregistered.
1050 * void (*ndo_poll_controller)(struct net_device *dev);
1052 * SR-IOV management functions.
1053 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1054 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1055 * u8 qos, __be16 proto);
1056 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1058 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1059 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1060 * int (*ndo_get_vf_config)(struct net_device *dev,
1061 * int vf, struct ifla_vf_info *ivf);
1062 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1063 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1064 * struct nlattr *port[]);
1066 * Enable or disable the VF ability to query its RSS Redirection Table and
1067 * Hash Key. This is needed since on some devices VF share this information
1068 * with PF and querying it may introduce a theoretical security risk.
1069 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1070 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1071 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1073 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1074 * This is always called from the stack with the rtnl lock held and netif
1075 * tx queues stopped. This allows the netdevice to perform queue
1076 * management safely.
1078 * Fiber Channel over Ethernet (FCoE) offload functions.
1079 * int (*ndo_fcoe_enable)(struct net_device *dev);
1080 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1081 * so the underlying device can perform whatever needed configuration or
1082 * initialization to support acceleration of FCoE traffic.
1084 * int (*ndo_fcoe_disable)(struct net_device *dev);
1085 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1086 * so the underlying device can perform whatever needed clean-ups to
1087 * stop supporting acceleration of FCoE traffic.
1089 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1090 * struct scatterlist *sgl, unsigned int sgc);
1091 * Called when the FCoE Initiator wants to initialize an I/O that
1092 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1093 * perform necessary setup and returns 1 to indicate the device is set up
1094 * successfully to perform DDP on this I/O, otherwise this returns 0.
1096 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1097 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1098 * indicated by the FC exchange id 'xid', so the underlying device can
1099 * clean up and reuse resources for later DDP requests.
1101 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1102 * struct scatterlist *sgl, unsigned int sgc);
1103 * Called when the FCoE Target wants to initialize an I/O that
1104 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1105 * perform necessary setup and returns 1 to indicate the device is set up
1106 * successfully to perform DDP on this I/O, otherwise this returns 0.
1108 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1109 * struct netdev_fcoe_hbainfo *hbainfo);
1110 * Called when the FCoE Protocol stack wants information on the underlying
1111 * device. This information is utilized by the FCoE protocol stack to
1112 * register attributes with Fiber Channel management service as per the
1113 * FC-GS Fabric Device Management Information(FDMI) specification.
1115 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1116 * Called when the underlying device wants to override default World Wide
1117 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1118 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1119 * protocol stack to use.
1122 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1123 * u16 rxq_index, u32 flow_id);
1124 * Set hardware filter for RFS. rxq_index is the target queue index;
1125 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1126 * Return the filter ID on success, or a negative error code.
1128 * Slave management functions (for bridge, bonding, etc).
1129 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1130 * Called to make another netdev an underling.
1132 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1133 * Called to release previously enslaved netdev.
1135 * Feature/offload setting functions.
1136 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1137 * netdev_features_t features);
1138 * Adjusts the requested feature flags according to device-specific
1139 * constraints, and returns the resulting flags. Must not modify
1142 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1143 * Called to update device configuration to new features. Passed
1144 * feature set might be less than what was returned by ndo_fix_features()).
1145 * Must return >0 or -errno if it changed dev->features itself.
1147 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1148 * struct net_device *dev,
1149 * const unsigned char *addr, u16 vid, u16 flags,
1150 * struct netlink_ext_ack *extack);
1151 * Adds an FDB entry to dev for addr.
1152 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1153 * struct net_device *dev,
1154 * const unsigned char *addr, u16 vid)
1155 * Deletes the FDB entry from dev coresponding to addr.
1156 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1157 * struct net_device *dev, struct net_device *filter_dev,
1159 * Used to add FDB entries to dump requests. Implementers should add
1160 * entries to skb and update idx with the number of entries.
1162 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1163 * u16 flags, struct netlink_ext_ack *extack)
1164 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1165 * struct net_device *dev, u32 filter_mask,
1167 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1170 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1171 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1172 * which do not represent real hardware may define this to allow their
1173 * userspace components to manage their virtual carrier state. Devices
1174 * that determine carrier state from physical hardware properties (eg
1175 * network cables) or protocol-dependent mechanisms (eg
1176 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1178 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1179 * struct netdev_phys_item_id *ppid);
1180 * Called to get ID of physical port of this device. If driver does
1181 * not implement this, it is assumed that the hw is not able to have
1182 * multiple net devices on single physical port.
1184 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1185 * struct netdev_phys_item_id *ppid)
1186 * Called to get the parent ID of the physical port of this device.
1188 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1189 * struct udp_tunnel_info *ti);
1190 * Called by UDP tunnel to notify a driver about the UDP port and socket
1191 * address family that a UDP tunnel is listnening to. It is called only
1192 * when a new port starts listening. The operation is protected by the
1195 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1196 * struct udp_tunnel_info *ti);
1197 * Called by UDP tunnel to notify the driver about a UDP port and socket
1198 * address family that the UDP tunnel is not listening to anymore. The
1199 * operation is protected by the RTNL.
1201 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1202 * struct net_device *dev)
1203 * Called by upper layer devices to accelerate switching or other
1204 * station functionality into hardware. 'pdev is the lowerdev
1205 * to use for the offload and 'dev' is the net device that will
1206 * back the offload. Returns a pointer to the private structure
1207 * the upper layer will maintain.
1208 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1209 * Called by upper layer device to delete the station created
1210 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1211 * the station and priv is the structure returned by the add
1213 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1214 * int queue_index, u32 maxrate);
1215 * Called when a user wants to set a max-rate limitation of specific
1217 * int (*ndo_get_iflink)(const struct net_device *dev);
1218 * Called to get the iflink value of this device.
1219 * void (*ndo_change_proto_down)(struct net_device *dev,
1221 * This function is used to pass protocol port error state information
1222 * to the switch driver. The switch driver can react to the proto_down
1223 * by doing a phys down on the associated switch port.
1224 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1225 * This function is used to get egress tunnel information for given skb.
1226 * This is useful for retrieving outer tunnel header parameters while
1228 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1229 * This function is used to specify the headroom that the skb must
1230 * consider when allocation skb during packet reception. Setting
1231 * appropriate rx headroom value allows avoiding skb head copy on
1232 * forward. Setting a negative value resets the rx headroom to the
1234 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1235 * This function is used to set or query state related to XDP on the
1236 * netdevice and manage BPF offload. See definition of
1237 * enum bpf_netdev_command for details.
1238 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1240 * This function is used to submit @n XDP packets for transmit on a
1241 * netdevice. Returns number of frames successfully transmitted, frames
1242 * that got dropped are freed/returned via xdp_return_frame().
1243 * Returns negative number, means general error invoking ndo, meaning
1244 * no frames were xmit'ed and core-caller will free all frames.
1245 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1246 * This function is used to wake up the softirq, ksoftirqd or kthread
1247 * responsible for sending and/or receiving packets on a specific
1248 * queue id bound to an AF_XDP socket. The flags field specifies if
1249 * only RX, only Tx, or both should be woken up using the flags
1250 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1251 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1252 * Get devlink port instance associated with a given netdev.
1253 * Called with a reference on the netdevice and devlink locks only,
1254 * rtnl_lock is not held.
1256 struct net_device_ops {
1257 int (*ndo_init)(struct net_device *dev);
1258 void (*ndo_uninit)(struct net_device *dev);
1259 int (*ndo_open)(struct net_device *dev);
1260 int (*ndo_stop)(struct net_device *dev);
1261 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1262 struct net_device *dev);
1263 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1264 struct net_device *dev,
1265 netdev_features_t features);
1266 u16 (*ndo_select_queue)(struct net_device *dev,
1267 struct sk_buff *skb,
1268 struct net_device *sb_dev);
1269 void (*ndo_change_rx_flags)(struct net_device *dev,
1271 void (*ndo_set_rx_mode)(struct net_device *dev);
1272 int (*ndo_set_mac_address)(struct net_device *dev,
1274 int (*ndo_validate_addr)(struct net_device *dev);
1275 int (*ndo_do_ioctl)(struct net_device *dev,
1276 struct ifreq *ifr, int cmd);
1277 int (*ndo_set_config)(struct net_device *dev,
1279 int (*ndo_change_mtu)(struct net_device *dev,
1281 int (*ndo_neigh_setup)(struct net_device *dev,
1282 struct neigh_parms *);
1283 void (*ndo_tx_timeout) (struct net_device *dev);
1285 void (*ndo_get_stats64)(struct net_device *dev,
1286 struct rtnl_link_stats64 *storage);
1287 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1288 int (*ndo_get_offload_stats)(int attr_id,
1289 const struct net_device *dev,
1291 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1293 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1294 __be16 proto, u16 vid);
1295 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1296 __be16 proto, u16 vid);
1297 #ifdef CONFIG_NET_POLL_CONTROLLER
1298 void (*ndo_poll_controller)(struct net_device *dev);
1299 int (*ndo_netpoll_setup)(struct net_device *dev,
1300 struct netpoll_info *info);
1301 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1303 int (*ndo_set_vf_mac)(struct net_device *dev,
1304 int queue, u8 *mac);
1305 int (*ndo_set_vf_vlan)(struct net_device *dev,
1306 int queue, u16 vlan,
1307 u8 qos, __be16 proto);
1308 int (*ndo_set_vf_rate)(struct net_device *dev,
1309 int vf, int min_tx_rate,
1311 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1312 int vf, bool setting);
1313 int (*ndo_set_vf_trust)(struct net_device *dev,
1314 int vf, bool setting);
1315 int (*ndo_get_vf_config)(struct net_device *dev,
1317 struct ifla_vf_info *ivf);
1318 int (*ndo_set_vf_link_state)(struct net_device *dev,
1319 int vf, int link_state);
1320 int (*ndo_get_vf_stats)(struct net_device *dev,
1322 struct ifla_vf_stats
1324 int (*ndo_set_vf_port)(struct net_device *dev,
1326 struct nlattr *port[]);
1327 int (*ndo_get_vf_port)(struct net_device *dev,
1328 int vf, struct sk_buff *skb);
1329 int (*ndo_set_vf_guid)(struct net_device *dev,
1332 int (*ndo_set_vf_rss_query_en)(
1333 struct net_device *dev,
1334 int vf, bool setting);
1335 int (*ndo_setup_tc)(struct net_device *dev,
1336 enum tc_setup_type type,
1338 #if IS_ENABLED(CONFIG_FCOE)
1339 int (*ndo_fcoe_enable)(struct net_device *dev);
1340 int (*ndo_fcoe_disable)(struct net_device *dev);
1341 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1343 struct scatterlist *sgl,
1345 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1347 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1349 struct scatterlist *sgl,
1351 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1352 struct netdev_fcoe_hbainfo *hbainfo);
1355 #if IS_ENABLED(CONFIG_LIBFCOE)
1356 #define NETDEV_FCOE_WWNN 0
1357 #define NETDEV_FCOE_WWPN 1
1358 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1359 u64 *wwn, int type);
1362 #ifdef CONFIG_RFS_ACCEL
1363 int (*ndo_rx_flow_steer)(struct net_device *dev,
1364 const struct sk_buff *skb,
1368 int (*ndo_add_slave)(struct net_device *dev,
1369 struct net_device *slave_dev,
1370 struct netlink_ext_ack *extack);
1371 int (*ndo_del_slave)(struct net_device *dev,
1372 struct net_device *slave_dev);
1373 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1374 netdev_features_t features);
1375 int (*ndo_set_features)(struct net_device *dev,
1376 netdev_features_t features);
1377 int (*ndo_neigh_construct)(struct net_device *dev,
1378 struct neighbour *n);
1379 void (*ndo_neigh_destroy)(struct net_device *dev,
1380 struct neighbour *n);
1382 int (*ndo_fdb_add)(struct ndmsg *ndm,
1383 struct nlattr *tb[],
1384 struct net_device *dev,
1385 const unsigned char *addr,
1388 struct netlink_ext_ack *extack);
1389 int (*ndo_fdb_del)(struct ndmsg *ndm,
1390 struct nlattr *tb[],
1391 struct net_device *dev,
1392 const unsigned char *addr,
1394 int (*ndo_fdb_dump)(struct sk_buff *skb,
1395 struct netlink_callback *cb,
1396 struct net_device *dev,
1397 struct net_device *filter_dev,
1399 int (*ndo_fdb_get)(struct sk_buff *skb,
1400 struct nlattr *tb[],
1401 struct net_device *dev,
1402 const unsigned char *addr,
1403 u16 vid, u32 portid, u32 seq,
1404 struct netlink_ext_ack *extack);
1405 int (*ndo_bridge_setlink)(struct net_device *dev,
1406 struct nlmsghdr *nlh,
1408 struct netlink_ext_ack *extack);
1409 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1411 struct net_device *dev,
1414 int (*ndo_bridge_dellink)(struct net_device *dev,
1415 struct nlmsghdr *nlh,
1417 int (*ndo_change_carrier)(struct net_device *dev,
1419 int (*ndo_get_phys_port_id)(struct net_device *dev,
1420 struct netdev_phys_item_id *ppid);
1421 int (*ndo_get_port_parent_id)(struct net_device *dev,
1422 struct netdev_phys_item_id *ppid);
1423 int (*ndo_get_phys_port_name)(struct net_device *dev,
1424 char *name, size_t len);
1425 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1426 struct udp_tunnel_info *ti);
1427 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1428 struct udp_tunnel_info *ti);
1429 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1430 struct net_device *dev);
1431 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1434 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1437 int (*ndo_get_iflink)(const struct net_device *dev);
1438 int (*ndo_change_proto_down)(struct net_device *dev,
1440 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1441 struct sk_buff *skb);
1442 void (*ndo_set_rx_headroom)(struct net_device *dev,
1443 int needed_headroom);
1444 int (*ndo_bpf)(struct net_device *dev,
1445 struct netdev_bpf *bpf);
1446 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1447 struct xdp_frame **xdp,
1449 int (*ndo_xsk_wakeup)(struct net_device *dev,
1450 u32 queue_id, u32 flags);
1451 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1455 * enum net_device_priv_flags - &struct net_device priv_flags
1457 * These are the &struct net_device, they are only set internally
1458 * by drivers and used in the kernel. These flags are invisible to
1459 * userspace; this means that the order of these flags can change
1460 * during any kernel release.
1462 * You should have a pretty good reason to be extending these flags.
1464 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1465 * @IFF_EBRIDGE: Ethernet bridging device
1466 * @IFF_BONDING: bonding master or slave
1467 * @IFF_ISATAP: ISATAP interface (RFC4214)
1468 * @IFF_WAN_HDLC: WAN HDLC device
1469 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1471 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1472 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1473 * @IFF_MACVLAN_PORT: device used as macvlan port
1474 * @IFF_BRIDGE_PORT: device used as bridge port
1475 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1476 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1477 * @IFF_UNICAST_FLT: Supports unicast filtering
1478 * @IFF_TEAM_PORT: device used as team port
1479 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1480 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1481 * change when it's running
1482 * @IFF_MACVLAN: Macvlan device
1483 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1484 * underlying stacked devices
1485 * @IFF_L3MDEV_MASTER: device is an L3 master device
1486 * @IFF_NO_QUEUE: device can run without qdisc attached
1487 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1488 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1489 * @IFF_TEAM: device is a team device
1490 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1491 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1492 * entity (i.e. the master device for bridged veth)
1493 * @IFF_MACSEC: device is a MACsec device
1494 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1495 * @IFF_FAILOVER: device is a failover master device
1496 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1497 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1498 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1500 enum netdev_priv_flags {
1501 IFF_802_1Q_VLAN = 1<<0,
1505 IFF_WAN_HDLC = 1<<4,
1506 IFF_XMIT_DST_RELEASE = 1<<5,
1507 IFF_DONT_BRIDGE = 1<<6,
1508 IFF_DISABLE_NETPOLL = 1<<7,
1509 IFF_MACVLAN_PORT = 1<<8,
1510 IFF_BRIDGE_PORT = 1<<9,
1511 IFF_OVS_DATAPATH = 1<<10,
1512 IFF_TX_SKB_SHARING = 1<<11,
1513 IFF_UNICAST_FLT = 1<<12,
1514 IFF_TEAM_PORT = 1<<13,
1515 IFF_SUPP_NOFCS = 1<<14,
1516 IFF_LIVE_ADDR_CHANGE = 1<<15,
1517 IFF_MACVLAN = 1<<16,
1518 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1519 IFF_L3MDEV_MASTER = 1<<18,
1520 IFF_NO_QUEUE = 1<<19,
1521 IFF_OPENVSWITCH = 1<<20,
1522 IFF_L3MDEV_SLAVE = 1<<21,
1524 IFF_RXFH_CONFIGURED = 1<<23,
1525 IFF_PHONY_HEADROOM = 1<<24,
1527 IFF_NO_RX_HANDLER = 1<<26,
1528 IFF_FAILOVER = 1<<27,
1529 IFF_FAILOVER_SLAVE = 1<<28,
1530 IFF_L3MDEV_RX_HANDLER = 1<<29,
1531 IFF_LIVE_RENAME_OK = 1<<30,
1534 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1535 #define IFF_EBRIDGE IFF_EBRIDGE
1536 #define IFF_BONDING IFF_BONDING
1537 #define IFF_ISATAP IFF_ISATAP
1538 #define IFF_WAN_HDLC IFF_WAN_HDLC
1539 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1540 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1541 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1542 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1543 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1544 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1545 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1546 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1547 #define IFF_TEAM_PORT IFF_TEAM_PORT
1548 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1549 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1550 #define IFF_MACVLAN IFF_MACVLAN
1551 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1552 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1553 #define IFF_NO_QUEUE IFF_NO_QUEUE
1554 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1555 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1556 #define IFF_TEAM IFF_TEAM
1557 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1558 #define IFF_MACSEC IFF_MACSEC
1559 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1560 #define IFF_FAILOVER IFF_FAILOVER
1561 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1562 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1563 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1566 * struct net_device - The DEVICE structure.
1568 * Actually, this whole structure is a big mistake. It mixes I/O
1569 * data with strictly "high-level" data, and it has to know about
1570 * almost every data structure used in the INET module.
1572 * @name: This is the first field of the "visible" part of this structure
1573 * (i.e. as seen by users in the "Space.c" file). It is the name
1576 * @name_node: Name hashlist node
1577 * @ifalias: SNMP alias
1578 * @mem_end: Shared memory end
1579 * @mem_start: Shared memory start
1580 * @base_addr: Device I/O address
1581 * @irq: Device IRQ number
1583 * @state: Generic network queuing layer state, see netdev_state_t
1584 * @dev_list: The global list of network devices
1585 * @napi_list: List entry used for polling NAPI devices
1586 * @unreg_list: List entry when we are unregistering the
1587 * device; see the function unregister_netdev
1588 * @close_list: List entry used when we are closing the device
1589 * @ptype_all: Device-specific packet handlers for all protocols
1590 * @ptype_specific: Device-specific, protocol-specific packet handlers
1592 * @adj_list: Directly linked devices, like slaves for bonding
1593 * @features: Currently active device features
1594 * @hw_features: User-changeable features
1596 * @wanted_features: User-requested features
1597 * @vlan_features: Mask of features inheritable by VLAN devices
1599 * @hw_enc_features: Mask of features inherited by encapsulating devices
1600 * This field indicates what encapsulation
1601 * offloads the hardware is capable of doing,
1602 * and drivers will need to set them appropriately.
1604 * @mpls_features: Mask of features inheritable by MPLS
1606 * @ifindex: interface index
1607 * @group: The group the device belongs to
1609 * @stats: Statistics struct, which was left as a legacy, use
1610 * rtnl_link_stats64 instead
1612 * @rx_dropped: Dropped packets by core network,
1613 * do not use this in drivers
1614 * @tx_dropped: Dropped packets by core network,
1615 * do not use this in drivers
1616 * @rx_nohandler: nohandler dropped packets by core network on
1617 * inactive devices, do not use this in drivers
1618 * @carrier_up_count: Number of times the carrier has been up
1619 * @carrier_down_count: Number of times the carrier has been down
1621 * @wireless_handlers: List of functions to handle Wireless Extensions,
1623 * see <net/iw_handler.h> for details.
1624 * @wireless_data: Instance data managed by the core of wireless extensions
1626 * @netdev_ops: Includes several pointers to callbacks,
1627 * if one wants to override the ndo_*() functions
1628 * @ethtool_ops: Management operations
1629 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1630 * discovery handling. Necessary for e.g. 6LoWPAN.
1631 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1632 * of Layer 2 headers.
1634 * @flags: Interface flags (a la BSD)
1635 * @priv_flags: Like 'flags' but invisible to userspace,
1636 * see if.h for the definitions
1637 * @gflags: Global flags ( kept as legacy )
1638 * @padded: How much padding added by alloc_netdev()
1639 * @operstate: RFC2863 operstate
1640 * @link_mode: Mapping policy to operstate
1641 * @if_port: Selectable AUI, TP, ...
1643 * @mtu: Interface MTU value
1644 * @min_mtu: Interface Minimum MTU value
1645 * @max_mtu: Interface Maximum MTU value
1646 * @type: Interface hardware type
1647 * @hard_header_len: Maximum hardware header length.
1648 * @min_header_len: Minimum hardware header length
1650 * @needed_headroom: Extra headroom the hardware may need, but not in all
1651 * cases can this be guaranteed
1652 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1653 * cases can this be guaranteed. Some cases also use
1654 * LL_MAX_HEADER instead to allocate the skb
1656 * interface address info:
1658 * @perm_addr: Permanent hw address
1659 * @addr_assign_type: Hw address assignment type
1660 * @addr_len: Hardware address length
1661 * @upper_level: Maximum depth level of upper devices.
1662 * @lower_level: Maximum depth level of lower devices.
1663 * @neigh_priv_len: Used in neigh_alloc()
1664 * @dev_id: Used to differentiate devices that share
1665 * the same link layer address
1666 * @dev_port: Used to differentiate devices that share
1668 * @addr_list_lock: XXX: need comments on this one
1669 * @uc_promisc: Counter that indicates promiscuous mode
1670 * has been enabled due to the need to listen to
1671 * additional unicast addresses in a device that
1672 * does not implement ndo_set_rx_mode()
1673 * @uc: unicast mac addresses
1674 * @mc: multicast mac addresses
1675 * @dev_addrs: list of device hw addresses
1676 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1677 * @promiscuity: Number of times the NIC is told to work in
1678 * promiscuous mode; if it becomes 0 the NIC will
1679 * exit promiscuous mode
1680 * @allmulti: Counter, enables or disables allmulticast mode
1682 * @vlan_info: VLAN info
1683 * @dsa_ptr: dsa specific data
1684 * @tipc_ptr: TIPC specific data
1685 * @atalk_ptr: AppleTalk link
1686 * @ip_ptr: IPv4 specific data
1687 * @dn_ptr: DECnet specific data
1688 * @ip6_ptr: IPv6 specific data
1689 * @ax25_ptr: AX.25 specific data
1690 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1692 * @dev_addr: Hw address (before bcast,
1693 * because most packets are unicast)
1695 * @_rx: Array of RX queues
1696 * @num_rx_queues: Number of RX queues
1697 * allocated at register_netdev() time
1698 * @real_num_rx_queues: Number of RX queues currently active in device
1700 * @rx_handler: handler for received packets
1701 * @rx_handler_data: XXX: need comments on this one
1702 * @miniq_ingress: ingress/clsact qdisc specific data for
1703 * ingress processing
1704 * @ingress_queue: XXX: need comments on this one
1705 * @broadcast: hw bcast address
1707 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1708 * indexed by RX queue number. Assigned by driver.
1709 * This must only be set if the ndo_rx_flow_steer
1710 * operation is defined
1711 * @index_hlist: Device index hash chain
1713 * @_tx: Array of TX queues
1714 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1715 * @real_num_tx_queues: Number of TX queues currently active in device
1716 * @qdisc: Root qdisc from userspace point of view
1717 * @tx_queue_len: Max frames per queue allowed
1718 * @tx_global_lock: XXX: need comments on this one
1720 * @xps_maps: XXX: need comments on this one
1721 * @miniq_egress: clsact qdisc specific data for
1723 * @watchdog_timeo: Represents the timeout that is used by
1724 * the watchdog (see dev_watchdog())
1725 * @watchdog_timer: List of timers
1727 * @pcpu_refcnt: Number of references to this device
1728 * @todo_list: Delayed register/unregister
1729 * @link_watch_list: XXX: need comments on this one
1731 * @reg_state: Register/unregister state machine
1732 * @dismantle: Device is going to be freed
1733 * @rtnl_link_state: This enum represents the phases of creating
1736 * @needs_free_netdev: Should unregister perform free_netdev?
1737 * @priv_destructor: Called from unregister
1738 * @npinfo: XXX: need comments on this one
1739 * @nd_net: Network namespace this network device is inside
1741 * @ml_priv: Mid-layer private
1742 * @lstats: Loopback statistics
1743 * @tstats: Tunnel statistics
1744 * @dstats: Dummy statistics
1745 * @vstats: Virtual ethernet statistics
1750 * @dev: Class/net/name entry
1751 * @sysfs_groups: Space for optional device, statistics and wireless
1754 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1755 * @rtnl_link_ops: Rtnl_link_ops
1757 * @gso_max_size: Maximum size of generic segmentation offload
1758 * @gso_max_segs: Maximum number of segments that can be passed to the
1761 * @dcbnl_ops: Data Center Bridging netlink ops
1762 * @num_tc: Number of traffic classes in the net device
1763 * @tc_to_txq: XXX: need comments on this one
1764 * @prio_tc_map: XXX: need comments on this one
1766 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1768 * @priomap: XXX: need comments on this one
1769 * @phydev: Physical device may attach itself
1770 * for hardware timestamping
1771 * @sfp_bus: attached &struct sfp_bus structure.
1772 * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
1774 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1775 * @qdisc_xmit_lock_key: lockdep class annotating
1776 * netdev_queue->_xmit_lock spinlock
1777 * @addr_list_lock_key: lockdep class annotating
1778 * net_device->addr_list_lock spinlock
1780 * @proto_down: protocol port state information can be sent to the
1781 * switch driver and used to set the phys state of the
1784 * @wol_enabled: Wake-on-LAN is enabled
1786 * FIXME: cleanup struct net_device such that network protocol info
1791 char name[IFNAMSIZ];
1792 struct netdev_name_node *name_node;
1793 struct dev_ifalias __rcu *ifalias;
1795 * I/O specific fields
1796 * FIXME: Merge these and struct ifmap into one
1798 unsigned long mem_end;
1799 unsigned long mem_start;
1800 unsigned long base_addr;
1804 * Some hardware also needs these fields (state,dev_list,
1805 * napi_list,unreg_list,close_list) but they are not
1806 * part of the usual set specified in Space.c.
1809 unsigned long state;
1811 struct list_head dev_list;
1812 struct list_head napi_list;
1813 struct list_head unreg_list;
1814 struct list_head close_list;
1815 struct list_head ptype_all;
1816 struct list_head ptype_specific;
1819 struct list_head upper;
1820 struct list_head lower;
1823 netdev_features_t features;
1824 netdev_features_t hw_features;
1825 netdev_features_t wanted_features;
1826 netdev_features_t vlan_features;
1827 netdev_features_t hw_enc_features;
1828 netdev_features_t mpls_features;
1829 netdev_features_t gso_partial_features;
1834 struct net_device_stats stats;
1836 atomic_long_t rx_dropped;
1837 atomic_long_t tx_dropped;
1838 atomic_long_t rx_nohandler;
1840 /* Stats to monitor link on/off, flapping */
1841 atomic_t carrier_up_count;
1842 atomic_t carrier_down_count;
1844 #ifdef CONFIG_WIRELESS_EXT
1845 const struct iw_handler_def *wireless_handlers;
1846 struct iw_public_data *wireless_data;
1848 const struct net_device_ops *netdev_ops;
1849 const struct ethtool_ops *ethtool_ops;
1850 #ifdef CONFIG_NET_L3_MASTER_DEV
1851 const struct l3mdev_ops *l3mdev_ops;
1853 #if IS_ENABLED(CONFIG_IPV6)
1854 const struct ndisc_ops *ndisc_ops;
1857 #ifdef CONFIG_XFRM_OFFLOAD
1858 const struct xfrmdev_ops *xfrmdev_ops;
1861 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1862 const struct tlsdev_ops *tlsdev_ops;
1865 const struct header_ops *header_ops;
1868 unsigned int priv_flags;
1870 unsigned short gflags;
1871 unsigned short padded;
1873 unsigned char operstate;
1874 unsigned char link_mode;
1876 unsigned char if_port;
1880 unsigned int min_mtu;
1881 unsigned int max_mtu;
1882 unsigned short type;
1883 unsigned short hard_header_len;
1884 unsigned char min_header_len;
1886 unsigned short needed_headroom;
1887 unsigned short needed_tailroom;
1889 /* Interface address info. */
1890 unsigned char perm_addr[MAX_ADDR_LEN];
1891 unsigned char addr_assign_type;
1892 unsigned char addr_len;
1893 unsigned char upper_level;
1894 unsigned char lower_level;
1895 unsigned short neigh_priv_len;
1896 unsigned short dev_id;
1897 unsigned short dev_port;
1898 spinlock_t addr_list_lock;
1899 unsigned char name_assign_type;
1901 struct netdev_hw_addr_list uc;
1902 struct netdev_hw_addr_list mc;
1903 struct netdev_hw_addr_list dev_addrs;
1906 struct kset *queues_kset;
1908 unsigned int promiscuity;
1909 unsigned int allmulti;
1912 /* Protocol-specific pointers */
1914 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1915 struct vlan_info __rcu *vlan_info;
1917 #if IS_ENABLED(CONFIG_NET_DSA)
1918 struct dsa_port *dsa_ptr;
1920 #if IS_ENABLED(CONFIG_TIPC)
1921 struct tipc_bearer __rcu *tipc_ptr;
1923 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1926 struct in_device __rcu *ip_ptr;
1927 #if IS_ENABLED(CONFIG_DECNET)
1928 struct dn_dev __rcu *dn_ptr;
1930 struct inet6_dev __rcu *ip6_ptr;
1931 #if IS_ENABLED(CONFIG_AX25)
1934 struct wireless_dev *ieee80211_ptr;
1935 struct wpan_dev *ieee802154_ptr;
1936 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1937 struct mpls_dev __rcu *mpls_ptr;
1941 * Cache lines mostly used on receive path (including eth_type_trans())
1943 /* Interface address info used in eth_type_trans() */
1944 unsigned char *dev_addr;
1946 struct netdev_rx_queue *_rx;
1947 unsigned int num_rx_queues;
1948 unsigned int real_num_rx_queues;
1950 struct bpf_prog __rcu *xdp_prog;
1951 unsigned long gro_flush_timeout;
1952 rx_handler_func_t __rcu *rx_handler;
1953 void __rcu *rx_handler_data;
1955 #ifdef CONFIG_NET_CLS_ACT
1956 struct mini_Qdisc __rcu *miniq_ingress;
1958 struct netdev_queue __rcu *ingress_queue;
1959 #ifdef CONFIG_NETFILTER_INGRESS
1960 struct nf_hook_entries __rcu *nf_hooks_ingress;
1963 unsigned char broadcast[MAX_ADDR_LEN];
1964 #ifdef CONFIG_RFS_ACCEL
1965 struct cpu_rmap *rx_cpu_rmap;
1967 struct hlist_node index_hlist;
1970 * Cache lines mostly used on transmit path
1972 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1973 unsigned int num_tx_queues;
1974 unsigned int real_num_tx_queues;
1975 struct Qdisc *qdisc;
1976 #ifdef CONFIG_NET_SCHED
1977 DECLARE_HASHTABLE (qdisc_hash, 4);
1979 unsigned int tx_queue_len;
1980 spinlock_t tx_global_lock;
1984 struct xps_dev_maps __rcu *xps_cpus_map;
1985 struct xps_dev_maps __rcu *xps_rxqs_map;
1987 #ifdef CONFIG_NET_CLS_ACT
1988 struct mini_Qdisc __rcu *miniq_egress;
1991 /* These may be needed for future network-power-down code. */
1992 struct timer_list watchdog_timer;
1994 int __percpu *pcpu_refcnt;
1995 struct list_head todo_list;
1997 struct list_head link_watch_list;
1999 enum { NETREG_UNINITIALIZED=0,
2000 NETREG_REGISTERED, /* completed register_netdevice */
2001 NETREG_UNREGISTERING, /* called unregister_netdevice */
2002 NETREG_UNREGISTERED, /* completed unregister todo */
2003 NETREG_RELEASED, /* called free_netdev */
2004 NETREG_DUMMY, /* dummy device for NAPI poll */
2010 RTNL_LINK_INITIALIZED,
2011 RTNL_LINK_INITIALIZING,
2012 } rtnl_link_state:16;
2014 bool needs_free_netdev;
2015 void (*priv_destructor)(struct net_device *dev);
2017 #ifdef CONFIG_NETPOLL
2018 struct netpoll_info __rcu *npinfo;
2021 possible_net_t nd_net;
2023 /* mid-layer private */
2026 struct pcpu_lstats __percpu *lstats;
2027 struct pcpu_sw_netstats __percpu *tstats;
2028 struct pcpu_dstats __percpu *dstats;
2031 #if IS_ENABLED(CONFIG_GARP)
2032 struct garp_port __rcu *garp_port;
2034 #if IS_ENABLED(CONFIG_MRP)
2035 struct mrp_port __rcu *mrp_port;
2039 const struct attribute_group *sysfs_groups[4];
2040 const struct attribute_group *sysfs_rx_queue_group;
2042 const struct rtnl_link_ops *rtnl_link_ops;
2044 /* for setting kernel sock attribute on TCP connection setup */
2045 #define GSO_MAX_SIZE 65536
2046 unsigned int gso_max_size;
2047 #define GSO_MAX_SEGS 65535
2051 const struct dcbnl_rtnl_ops *dcbnl_ops;
2054 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2055 u8 prio_tc_map[TC_BITMASK + 1];
2057 #if IS_ENABLED(CONFIG_FCOE)
2058 unsigned int fcoe_ddp_xid;
2060 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2061 struct netprio_map __rcu *priomap;
2063 struct phy_device *phydev;
2064 struct sfp_bus *sfp_bus;
2065 struct lock_class_key qdisc_tx_busylock_key;
2066 struct lock_class_key qdisc_running_key;
2067 struct lock_class_key qdisc_xmit_lock_key;
2068 struct lock_class_key addr_list_lock_key;
2070 unsigned wol_enabled:1;
2072 #define to_net_dev(d) container_of(d, struct net_device, dev)
2074 static inline bool netif_elide_gro(const struct net_device *dev)
2076 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2081 #define NETDEV_ALIGN 32
2084 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2086 return dev->prio_tc_map[prio & TC_BITMASK];
2090 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2092 if (tc >= dev->num_tc)
2095 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2099 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2100 void netdev_reset_tc(struct net_device *dev);
2101 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2102 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2105 int netdev_get_num_tc(struct net_device *dev)
2110 void netdev_unbind_sb_channel(struct net_device *dev,
2111 struct net_device *sb_dev);
2112 int netdev_bind_sb_channel_queue(struct net_device *dev,
2113 struct net_device *sb_dev,
2114 u8 tc, u16 count, u16 offset);
2115 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2116 static inline int netdev_get_sb_channel(struct net_device *dev)
2118 return max_t(int, -dev->num_tc, 0);
2122 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2125 return &dev->_tx[index];
2128 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2129 const struct sk_buff *skb)
2131 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2134 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2135 void (*f)(struct net_device *,
2136 struct netdev_queue *,
2142 for (i = 0; i < dev->num_tx_queues; i++)
2143 f(dev, &dev->_tx[i], arg);
2146 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2147 struct net_device *sb_dev);
2148 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2149 struct sk_buff *skb,
2150 struct net_device *sb_dev);
2152 /* returns the headroom that the master device needs to take in account
2153 * when forwarding to this dev
2155 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2157 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2160 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2162 if (dev->netdev_ops->ndo_set_rx_headroom)
2163 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2166 /* set the device rx headroom to the dev's default */
2167 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2169 netdev_set_rx_headroom(dev, -1);
2173 * Net namespace inlines
2176 struct net *dev_net(const struct net_device *dev)
2178 return read_pnet(&dev->nd_net);
2182 void dev_net_set(struct net_device *dev, struct net *net)
2184 write_pnet(&dev->nd_net, net);
2188 * netdev_priv - access network device private data
2189 * @dev: network device
2191 * Get network device private data
2193 static inline void *netdev_priv(const struct net_device *dev)
2195 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2198 /* Set the sysfs physical device reference for the network logical device
2199 * if set prior to registration will cause a symlink during initialization.
2201 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2203 /* Set the sysfs device type for the network logical device to allow
2204 * fine-grained identification of different network device types. For
2205 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2207 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2209 /* Default NAPI poll() weight
2210 * Device drivers are strongly advised to not use bigger value
2212 #define NAPI_POLL_WEIGHT 64
2215 * netif_napi_add - initialize a NAPI context
2216 * @dev: network device
2217 * @napi: NAPI context
2218 * @poll: polling function
2219 * @weight: default weight
2221 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2222 * *any* of the other NAPI-related functions.
2224 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2225 int (*poll)(struct napi_struct *, int), int weight);
2228 * netif_tx_napi_add - initialize a NAPI context
2229 * @dev: network device
2230 * @napi: NAPI context
2231 * @poll: polling function
2232 * @weight: default weight
2234 * This variant of netif_napi_add() should be used from drivers using NAPI
2235 * to exclusively poll a TX queue.
2236 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2238 static inline void netif_tx_napi_add(struct net_device *dev,
2239 struct napi_struct *napi,
2240 int (*poll)(struct napi_struct *, int),
2243 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2244 netif_napi_add(dev, napi, poll, weight);
2248 * netif_napi_del - remove a NAPI context
2249 * @napi: NAPI context
2251 * netif_napi_del() removes a NAPI context from the network device NAPI list
2253 void netif_napi_del(struct napi_struct *napi);
2255 struct napi_gro_cb {
2256 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2259 /* Length of frag0. */
2260 unsigned int frag0_len;
2262 /* This indicates where we are processing relative to skb->data. */
2265 /* This is non-zero if the packet cannot be merged with the new skb. */
2268 /* Save the IP ID here and check when we get to the transport layer */
2271 /* Number of segments aggregated. */
2274 /* Start offset for remote checksum offload */
2275 u16 gro_remcsum_start;
2277 /* jiffies when first packet was created/queued */
2280 /* Used in ipv6_gro_receive() and foo-over-udp */
2283 /* This is non-zero if the packet may be of the same flow. */
2286 /* Used in tunnel GRO receive */
2289 /* GRO checksum is valid */
2292 /* Number of checksums via CHECKSUM_UNNECESSARY */
2297 #define NAPI_GRO_FREE 1
2298 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2300 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2303 /* Used in GRE, set in fou/gue_gro_receive */
2306 /* Used to determine if flush_id can be ignored */
2309 /* Number of gro_receive callbacks this packet already went through */
2310 u8 recursion_counter:4;
2314 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2317 /* used in skb_gro_receive() slow path */
2318 struct sk_buff *last;
2321 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2323 #define GRO_RECURSION_LIMIT 15
2324 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2326 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2329 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2330 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2331 struct list_head *head,
2332 struct sk_buff *skb)
2334 if (unlikely(gro_recursion_inc_test(skb))) {
2335 NAPI_GRO_CB(skb)->flush |= 1;
2339 return cb(head, skb);
2342 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2344 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2346 struct list_head *head,
2347 struct sk_buff *skb)
2349 if (unlikely(gro_recursion_inc_test(skb))) {
2350 NAPI_GRO_CB(skb)->flush |= 1;
2354 return cb(sk, head, skb);
2357 struct packet_type {
2358 __be16 type; /* This is really htons(ether_type). */
2359 bool ignore_outgoing;
2360 struct net_device *dev; /* NULL is wildcarded here */
2361 int (*func) (struct sk_buff *,
2362 struct net_device *,
2363 struct packet_type *,
2364 struct net_device *);
2365 void (*list_func) (struct list_head *,
2366 struct packet_type *,
2367 struct net_device *);
2368 bool (*id_match)(struct packet_type *ptype,
2370 void *af_packet_priv;
2371 struct list_head list;
2374 struct offload_callbacks {
2375 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2376 netdev_features_t features);
2377 struct sk_buff *(*gro_receive)(struct list_head *head,
2378 struct sk_buff *skb);
2379 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2382 struct packet_offload {
2383 __be16 type; /* This is really htons(ether_type). */
2385 struct offload_callbacks callbacks;
2386 struct list_head list;
2389 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2390 struct pcpu_sw_netstats {
2395 struct u64_stats_sync syncp;
2396 } __aligned(4 * sizeof(u64));
2398 struct pcpu_lstats {
2401 struct u64_stats_sync syncp;
2402 } __aligned(2 * sizeof(u64));
2404 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2406 #define __netdev_alloc_pcpu_stats(type, gfp) \
2408 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2411 for_each_possible_cpu(__cpu) { \
2412 typeof(type) *stat; \
2413 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2414 u64_stats_init(&stat->syncp); \
2420 #define netdev_alloc_pcpu_stats(type) \
2421 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2423 enum netdev_lag_tx_type {
2424 NETDEV_LAG_TX_TYPE_UNKNOWN,
2425 NETDEV_LAG_TX_TYPE_RANDOM,
2426 NETDEV_LAG_TX_TYPE_BROADCAST,
2427 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2428 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2429 NETDEV_LAG_TX_TYPE_HASH,
2432 enum netdev_lag_hash {
2433 NETDEV_LAG_HASH_NONE,
2435 NETDEV_LAG_HASH_L34,
2436 NETDEV_LAG_HASH_L23,
2437 NETDEV_LAG_HASH_E23,
2438 NETDEV_LAG_HASH_E34,
2439 NETDEV_LAG_HASH_UNKNOWN,
2442 struct netdev_lag_upper_info {
2443 enum netdev_lag_tx_type tx_type;
2444 enum netdev_lag_hash hash_type;
2447 struct netdev_lag_lower_state_info {
2452 #include <linux/notifier.h>
2454 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2455 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2459 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2461 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2462 detected a hardware crash and restarted
2463 - we can use this eg to kick tcp sessions
2465 NETDEV_CHANGE, /* Notify device state change */
2468 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2469 NETDEV_CHANGEADDR, /* notify after the address change */
2470 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2474 NETDEV_BONDING_FAILOVER,
2476 NETDEV_PRE_TYPE_CHANGE,
2477 NETDEV_POST_TYPE_CHANGE,
2480 NETDEV_NOTIFY_PEERS,
2484 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2485 NETDEV_CHANGEINFODATA,
2486 NETDEV_BONDING_INFO,
2487 NETDEV_PRECHANGEUPPER,
2488 NETDEV_CHANGELOWERSTATE,
2489 NETDEV_UDP_TUNNEL_PUSH_INFO,
2490 NETDEV_UDP_TUNNEL_DROP_INFO,
2491 NETDEV_CHANGE_TX_QUEUE_LEN,
2492 NETDEV_CVLAN_FILTER_PUSH_INFO,
2493 NETDEV_CVLAN_FILTER_DROP_INFO,
2494 NETDEV_SVLAN_FILTER_PUSH_INFO,
2495 NETDEV_SVLAN_FILTER_DROP_INFO,
2497 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2499 int register_netdevice_notifier(struct notifier_block *nb);
2500 int unregister_netdevice_notifier(struct notifier_block *nb);
2501 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2502 int unregister_netdevice_notifier_net(struct net *net,
2503 struct notifier_block *nb);
2505 struct netdev_notifier_info {
2506 struct net_device *dev;
2507 struct netlink_ext_ack *extack;
2510 struct netdev_notifier_info_ext {
2511 struct netdev_notifier_info info; /* must be first */
2517 struct netdev_notifier_change_info {
2518 struct netdev_notifier_info info; /* must be first */
2519 unsigned int flags_changed;
2522 struct netdev_notifier_changeupper_info {
2523 struct netdev_notifier_info info; /* must be first */
2524 struct net_device *upper_dev; /* new upper dev */
2525 bool master; /* is upper dev master */
2526 bool linking; /* is the notification for link or unlink */
2527 void *upper_info; /* upper dev info */
2530 struct netdev_notifier_changelowerstate_info {
2531 struct netdev_notifier_info info; /* must be first */
2532 void *lower_state_info; /* is lower dev state */
2535 struct netdev_notifier_pre_changeaddr_info {
2536 struct netdev_notifier_info info; /* must be first */
2537 const unsigned char *dev_addr;
2540 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2541 struct net_device *dev)
2544 info->extack = NULL;
2547 static inline struct net_device *
2548 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2553 static inline struct netlink_ext_ack *
2554 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2556 return info->extack;
2559 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2562 extern rwlock_t dev_base_lock; /* Device list lock */
2564 #define for_each_netdev(net, d) \
2565 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2566 #define for_each_netdev_reverse(net, d) \
2567 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2568 #define for_each_netdev_rcu(net, d) \
2569 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2570 #define for_each_netdev_safe(net, d, n) \
2571 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2572 #define for_each_netdev_continue(net, d) \
2573 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2574 #define for_each_netdev_continue_reverse(net, d) \
2575 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2577 #define for_each_netdev_continue_rcu(net, d) \
2578 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2579 #define for_each_netdev_in_bond_rcu(bond, slave) \
2580 for_each_netdev_rcu(&init_net, slave) \
2581 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2582 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2584 static inline struct net_device *next_net_device(struct net_device *dev)
2586 struct list_head *lh;
2590 lh = dev->dev_list.next;
2591 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2594 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2596 struct list_head *lh;
2600 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2601 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2604 static inline struct net_device *first_net_device(struct net *net)
2606 return list_empty(&net->dev_base_head) ? NULL :
2607 net_device_entry(net->dev_base_head.next);
2610 static inline struct net_device *first_net_device_rcu(struct net *net)
2612 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2614 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2617 int netdev_boot_setup_check(struct net_device *dev);
2618 unsigned long netdev_boot_base(const char *prefix, int unit);
2619 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2620 const char *hwaddr);
2621 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2622 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2623 void dev_add_pack(struct packet_type *pt);
2624 void dev_remove_pack(struct packet_type *pt);
2625 void __dev_remove_pack(struct packet_type *pt);
2626 void dev_add_offload(struct packet_offload *po);
2627 void dev_remove_offload(struct packet_offload *po);
2629 int dev_get_iflink(const struct net_device *dev);
2630 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2631 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2632 unsigned short mask);
2633 struct net_device *dev_get_by_name(struct net *net, const char *name);
2634 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2635 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2636 int dev_alloc_name(struct net_device *dev, const char *name);
2637 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2638 void dev_close(struct net_device *dev);
2639 void dev_close_many(struct list_head *head, bool unlink);
2640 void dev_disable_lro(struct net_device *dev);
2641 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2642 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2643 struct net_device *sb_dev);
2644 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2645 struct net_device *sb_dev);
2646 int dev_queue_xmit(struct sk_buff *skb);
2647 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2648 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2649 int register_netdevice(struct net_device *dev);
2650 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2651 void unregister_netdevice_many(struct list_head *head);
2652 static inline void unregister_netdevice(struct net_device *dev)
2654 unregister_netdevice_queue(dev, NULL);
2657 int netdev_refcnt_read(const struct net_device *dev);
2658 void free_netdev(struct net_device *dev);
2659 void netdev_freemem(struct net_device *dev);
2660 void synchronize_net(void);
2661 int init_dummy_netdev(struct net_device *dev);
2663 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2664 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2665 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2666 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2667 int netdev_get_name(struct net *net, char *name, int ifindex);
2668 int dev_restart(struct net_device *dev);
2669 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2671 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2673 return NAPI_GRO_CB(skb)->data_offset;
2676 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2678 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2681 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2683 NAPI_GRO_CB(skb)->data_offset += len;
2686 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2687 unsigned int offset)
2689 return NAPI_GRO_CB(skb)->frag0 + offset;
2692 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2694 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2697 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2699 NAPI_GRO_CB(skb)->frag0 = NULL;
2700 NAPI_GRO_CB(skb)->frag0_len = 0;
2703 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2704 unsigned int offset)
2706 if (!pskb_may_pull(skb, hlen))
2709 skb_gro_frag0_invalidate(skb);
2710 return skb->data + offset;
2713 static inline void *skb_gro_network_header(struct sk_buff *skb)
2715 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2716 skb_network_offset(skb);
2719 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2720 const void *start, unsigned int len)
2722 if (NAPI_GRO_CB(skb)->csum_valid)
2723 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2724 csum_partial(start, len, 0));
2727 /* GRO checksum functions. These are logical equivalents of the normal
2728 * checksum functions (in skbuff.h) except that they operate on the GRO
2729 * offsets and fields in sk_buff.
2732 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2734 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2736 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2739 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2743 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2744 skb_checksum_start_offset(skb) <
2745 skb_gro_offset(skb)) &&
2746 !skb_at_gro_remcsum_start(skb) &&
2747 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2748 (!zero_okay || check));
2751 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2754 if (NAPI_GRO_CB(skb)->csum_valid &&
2755 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2758 NAPI_GRO_CB(skb)->csum = psum;
2760 return __skb_gro_checksum_complete(skb);
2763 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2765 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2766 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2767 NAPI_GRO_CB(skb)->csum_cnt--;
2769 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2770 * verified a new top level checksum or an encapsulated one
2771 * during GRO. This saves work if we fallback to normal path.
2773 __skb_incr_checksum_unnecessary(skb);
2777 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2780 __sum16 __ret = 0; \
2781 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2782 __ret = __skb_gro_checksum_validate_complete(skb, \
2783 compute_pseudo(skb, proto)); \
2785 skb_gro_incr_csum_unnecessary(skb); \
2789 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2790 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2792 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2794 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2796 #define skb_gro_checksum_simple_validate(skb) \
2797 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2799 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2801 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2802 !NAPI_GRO_CB(skb)->csum_valid);
2805 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2806 __sum16 check, __wsum pseudo)
2808 NAPI_GRO_CB(skb)->csum = ~pseudo;
2809 NAPI_GRO_CB(skb)->csum_valid = 1;
2812 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2814 if (__skb_gro_checksum_convert_check(skb)) \
2815 __skb_gro_checksum_convert(skb, check, \
2816 compute_pseudo(skb, proto)); \
2819 struct gro_remcsum {
2824 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2830 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2831 unsigned int off, size_t hdrlen,
2832 int start, int offset,
2833 struct gro_remcsum *grc,
2837 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2839 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2842 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2846 ptr = skb_gro_header_fast(skb, off);
2847 if (skb_gro_header_hard(skb, off + plen)) {
2848 ptr = skb_gro_header_slow(skb, off + plen, off);
2853 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2856 /* Adjust skb->csum since we changed the packet */
2857 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2859 grc->offset = off + hdrlen + offset;
2865 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2866 struct gro_remcsum *grc)
2869 size_t plen = grc->offset + sizeof(u16);
2874 ptr = skb_gro_header_fast(skb, grc->offset);
2875 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2876 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2881 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2884 #ifdef CONFIG_XFRM_OFFLOAD
2885 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2887 if (PTR_ERR(pp) != -EINPROGRESS)
2888 NAPI_GRO_CB(skb)->flush |= flush;
2890 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2893 struct gro_remcsum *grc)
2895 if (PTR_ERR(pp) != -EINPROGRESS) {
2896 NAPI_GRO_CB(skb)->flush |= flush;
2897 skb_gro_remcsum_cleanup(skb, grc);
2898 skb->remcsum_offload = 0;
2902 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2904 NAPI_GRO_CB(skb)->flush |= flush;
2906 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2909 struct gro_remcsum *grc)
2911 NAPI_GRO_CB(skb)->flush |= flush;
2912 skb_gro_remcsum_cleanup(skb, grc);
2913 skb->remcsum_offload = 0;
2917 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2918 unsigned short type,
2919 const void *daddr, const void *saddr,
2922 if (!dev->header_ops || !dev->header_ops->create)
2925 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2928 static inline int dev_parse_header(const struct sk_buff *skb,
2929 unsigned char *haddr)
2931 const struct net_device *dev = skb->dev;
2933 if (!dev->header_ops || !dev->header_ops->parse)
2935 return dev->header_ops->parse(skb, haddr);
2938 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
2940 const struct net_device *dev = skb->dev;
2942 if (!dev->header_ops || !dev->header_ops->parse_protocol)
2944 return dev->header_ops->parse_protocol(skb);
2947 /* ll_header must have at least hard_header_len allocated */
2948 static inline bool dev_validate_header(const struct net_device *dev,
2949 char *ll_header, int len)
2951 if (likely(len >= dev->hard_header_len))
2953 if (len < dev->min_header_len)
2956 if (capable(CAP_SYS_RAWIO)) {
2957 memset(ll_header + len, 0, dev->hard_header_len - len);
2961 if (dev->header_ops && dev->header_ops->validate)
2962 return dev->header_ops->validate(ll_header, len);
2967 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2969 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2970 static inline int unregister_gifconf(unsigned int family)
2972 return register_gifconf(family, NULL);
2975 #ifdef CONFIG_NET_FLOW_LIMIT
2976 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2977 struct sd_flow_limit {
2979 unsigned int num_buckets;
2980 unsigned int history_head;
2981 u16 history[FLOW_LIMIT_HISTORY];
2985 extern int netdev_flow_limit_table_len;
2986 #endif /* CONFIG_NET_FLOW_LIMIT */
2989 * Incoming packets are placed on per-CPU queues
2991 struct softnet_data {
2992 struct list_head poll_list;
2993 struct sk_buff_head process_queue;
2996 unsigned int processed;
2997 unsigned int time_squeeze;
2998 unsigned int received_rps;
3000 struct softnet_data *rps_ipi_list;
3002 #ifdef CONFIG_NET_FLOW_LIMIT
3003 struct sd_flow_limit __rcu *flow_limit;
3005 struct Qdisc *output_queue;
3006 struct Qdisc **output_queue_tailp;
3007 struct sk_buff *completion_queue;
3008 #ifdef CONFIG_XFRM_OFFLOAD
3009 struct sk_buff_head xfrm_backlog;
3011 /* written and read only by owning cpu: */
3017 /* input_queue_head should be written by cpu owning this struct,
3018 * and only read by other cpus. Worth using a cache line.
3020 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3022 /* Elements below can be accessed between CPUs for RPS/RFS */
3023 call_single_data_t csd ____cacheline_aligned_in_smp;
3024 struct softnet_data *rps_ipi_next;
3026 unsigned int input_queue_tail;
3028 unsigned int dropped;
3029 struct sk_buff_head input_pkt_queue;
3030 struct napi_struct backlog;
3034 static inline void input_queue_head_incr(struct softnet_data *sd)
3037 sd->input_queue_head++;
3041 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3042 unsigned int *qtail)
3045 *qtail = ++sd->input_queue_tail;
3049 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3051 static inline int dev_recursion_level(void)
3053 return this_cpu_read(softnet_data.xmit.recursion);
3056 #define XMIT_RECURSION_LIMIT 10
3057 static inline bool dev_xmit_recursion(void)
3059 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3060 XMIT_RECURSION_LIMIT);
3063 static inline void dev_xmit_recursion_inc(void)
3065 __this_cpu_inc(softnet_data.xmit.recursion);
3068 static inline void dev_xmit_recursion_dec(void)
3070 __this_cpu_dec(softnet_data.xmit.recursion);
3073 void __netif_schedule(struct Qdisc *q);
3074 void netif_schedule_queue(struct netdev_queue *txq);
3076 static inline void netif_tx_schedule_all(struct net_device *dev)
3080 for (i = 0; i < dev->num_tx_queues; i++)
3081 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3084 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3086 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3090 * netif_start_queue - allow transmit
3091 * @dev: network device
3093 * Allow upper layers to call the device hard_start_xmit routine.
3095 static inline void netif_start_queue(struct net_device *dev)
3097 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3100 static inline void netif_tx_start_all_queues(struct net_device *dev)
3104 for (i = 0; i < dev->num_tx_queues; i++) {
3105 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3106 netif_tx_start_queue(txq);
3110 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3113 * netif_wake_queue - restart transmit
3114 * @dev: network device
3116 * Allow upper layers to call the device hard_start_xmit routine.
3117 * Used for flow control when transmit resources are available.
3119 static inline void netif_wake_queue(struct net_device *dev)
3121 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3124 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3128 for (i = 0; i < dev->num_tx_queues; i++) {
3129 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3130 netif_tx_wake_queue(txq);
3134 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3136 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3140 * netif_stop_queue - stop transmitted packets
3141 * @dev: network device
3143 * Stop upper layers calling the device hard_start_xmit routine.
3144 * Used for flow control when transmit resources are unavailable.
3146 static inline void netif_stop_queue(struct net_device *dev)
3148 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3151 void netif_tx_stop_all_queues(struct net_device *dev);
3152 void netdev_update_lockdep_key(struct net_device *dev);
3154 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3156 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3160 * netif_queue_stopped - test if transmit queue is flowblocked
3161 * @dev: network device
3163 * Test if transmit queue on device is currently unable to send.
3165 static inline bool netif_queue_stopped(const struct net_device *dev)
3167 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3170 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3172 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3176 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3178 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3182 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3184 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3188 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3189 * @dev_queue: pointer to transmit queue
3191 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3192 * to give appropriate hint to the CPU.
3194 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3197 prefetchw(&dev_queue->dql.num_queued);
3202 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3203 * @dev_queue: pointer to transmit queue
3205 * BQL enabled drivers might use this helper in their TX completion path,
3206 * to give appropriate hint to the CPU.
3208 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3211 prefetchw(&dev_queue->dql.limit);
3215 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3219 dql_queued(&dev_queue->dql, bytes);
3221 if (likely(dql_avail(&dev_queue->dql) >= 0))
3224 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3227 * The XOFF flag must be set before checking the dql_avail below,
3228 * because in netdev_tx_completed_queue we update the dql_completed
3229 * before checking the XOFF flag.
3233 /* check again in case another CPU has just made room avail */
3234 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3235 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3239 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3240 * that they should not test BQL status themselves.
3241 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3243 * Returns true if the doorbell must be used to kick the NIC.
3245 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3251 dql_queued(&dev_queue->dql, bytes);
3253 return netif_tx_queue_stopped(dev_queue);
3255 netdev_tx_sent_queue(dev_queue, bytes);
3260 * netdev_sent_queue - report the number of bytes queued to hardware
3261 * @dev: network device
3262 * @bytes: number of bytes queued to the hardware device queue
3264 * Report the number of bytes queued for sending/completion to the network
3265 * device hardware queue. @bytes should be a good approximation and should
3266 * exactly match netdev_completed_queue() @bytes
3268 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3270 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3273 static inline bool __netdev_sent_queue(struct net_device *dev,
3277 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3281 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3282 unsigned int pkts, unsigned int bytes)
3285 if (unlikely(!bytes))
3288 dql_completed(&dev_queue->dql, bytes);
3291 * Without the memory barrier there is a small possiblity that
3292 * netdev_tx_sent_queue will miss the update and cause the queue to
3293 * be stopped forever
3297 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3300 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3301 netif_schedule_queue(dev_queue);
3306 * netdev_completed_queue - report bytes and packets completed by device
3307 * @dev: network device
3308 * @pkts: actual number of packets sent over the medium
3309 * @bytes: actual number of bytes sent over the medium
3311 * Report the number of bytes and packets transmitted by the network device
3312 * hardware queue over the physical medium, @bytes must exactly match the
3313 * @bytes amount passed to netdev_sent_queue()
3315 static inline void netdev_completed_queue(struct net_device *dev,
3316 unsigned int pkts, unsigned int bytes)
3318 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3321 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3324 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3330 * netdev_reset_queue - reset the packets and bytes count of a network device
3331 * @dev_queue: network device
3333 * Reset the bytes and packet count of a network device and clear the
3334 * software flow control OFF bit for this network device
3336 static inline void netdev_reset_queue(struct net_device *dev_queue)
3338 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3342 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3343 * @dev: network device
3344 * @queue_index: given tx queue index
3346 * Returns 0 if given tx queue index >= number of device tx queues,
3347 * otherwise returns the originally passed tx queue index.
3349 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3351 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3352 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3353 dev->name, queue_index,
3354 dev->real_num_tx_queues);
3362 * netif_running - test if up
3363 * @dev: network device
3365 * Test if the device has been brought up.
3367 static inline bool netif_running(const struct net_device *dev)
3369 return test_bit(__LINK_STATE_START, &dev->state);
3373 * Routines to manage the subqueues on a device. We only need start,
3374 * stop, and a check if it's stopped. All other device management is
3375 * done at the overall netdevice level.
3376 * Also test the device if we're multiqueue.
3380 * netif_start_subqueue - allow sending packets on subqueue
3381 * @dev: network device
3382 * @queue_index: sub queue index
3384 * Start individual transmit queue of a device with multiple transmit queues.
3386 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3388 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3390 netif_tx_start_queue(txq);
3394 * netif_stop_subqueue - stop sending packets on subqueue
3395 * @dev: network device
3396 * @queue_index: sub queue index
3398 * Stop individual transmit queue of a device with multiple transmit queues.
3400 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3402 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3403 netif_tx_stop_queue(txq);
3407 * netif_subqueue_stopped - test status of subqueue
3408 * @dev: network device
3409 * @queue_index: sub queue index
3411 * Check individual transmit queue of a device with multiple transmit queues.
3413 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3416 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3418 return netif_tx_queue_stopped(txq);
3421 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3422 struct sk_buff *skb)
3424 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3428 * netif_wake_subqueue - allow sending packets on subqueue
3429 * @dev: network device
3430 * @queue_index: sub queue index
3432 * Resume individual transmit queue of a device with multiple transmit queues.
3434 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3436 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3438 netif_tx_wake_queue(txq);
3442 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3444 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3445 u16 index, bool is_rxqs_map);
3448 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3449 * @j: CPU/Rx queue index
3450 * @mask: bitmask of all cpus/rx queues
3451 * @nr_bits: number of bits in the bitmask
3453 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3455 static inline bool netif_attr_test_mask(unsigned long j,
3456 const unsigned long *mask,
3457 unsigned int nr_bits)
3459 cpu_max_bits_warn(j, nr_bits);
3460 return test_bit(j, mask);
3464 * netif_attr_test_online - Test for online CPU/Rx queue
3465 * @j: CPU/Rx queue index
3466 * @online_mask: bitmask for CPUs/Rx queues that are online
3467 * @nr_bits: number of bits in the bitmask
3469 * Returns true if a CPU/Rx queue is online.
3471 static inline bool netif_attr_test_online(unsigned long j,
3472 const unsigned long *online_mask,
3473 unsigned int nr_bits)
3475 cpu_max_bits_warn(j, nr_bits);
3478 return test_bit(j, online_mask);
3480 return (j < nr_bits);
3484 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3485 * @n: CPU/Rx queue index
3486 * @srcp: the cpumask/Rx queue mask pointer
3487 * @nr_bits: number of bits in the bitmask
3489 * Returns >= nr_bits if no further CPUs/Rx queues set.
3491 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3492 unsigned int nr_bits)
3494 /* -1 is a legal arg here. */
3496 cpu_max_bits_warn(n, nr_bits);
3499 return find_next_bit(srcp, nr_bits, n + 1);
3505 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3506 * @n: CPU/Rx queue index
3507 * @src1p: the first CPUs/Rx queues mask pointer
3508 * @src2p: the second CPUs/Rx queues mask pointer
3509 * @nr_bits: number of bits in the bitmask
3511 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3513 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3514 const unsigned long *src2p,
3515 unsigned int nr_bits)
3517 /* -1 is a legal arg here. */
3519 cpu_max_bits_warn(n, nr_bits);
3522 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3524 return find_next_bit(src1p, nr_bits, n + 1);
3526 return find_next_bit(src2p, nr_bits, n + 1);
3531 static inline int netif_set_xps_queue(struct net_device *dev,
3532 const struct cpumask *mask,
3538 static inline int __netif_set_xps_queue(struct net_device *dev,
3539 const unsigned long *mask,
3540 u16 index, bool is_rxqs_map)
3547 * netif_is_multiqueue - test if device has multiple transmit queues
3548 * @dev: network device
3550 * Check if device has multiple transmit queues
3552 static inline bool netif_is_multiqueue(const struct net_device *dev)
3554 return dev->num_tx_queues > 1;
3557 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3560 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3562 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3565 dev->real_num_rx_queues = rxqs;
3570 static inline struct netdev_rx_queue *
3571 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3573 return dev->_rx + rxq;
3577 static inline unsigned int get_netdev_rx_queue_index(
3578 struct netdev_rx_queue *queue)
3580 struct net_device *dev = queue->dev;
3581 int index = queue - dev->_rx;
3583 BUG_ON(index >= dev->num_rx_queues);
3588 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3589 int netif_get_num_default_rss_queues(void);
3591 enum skb_free_reason {
3592 SKB_REASON_CONSUMED,
3596 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3597 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3600 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3601 * interrupt context or with hardware interrupts being disabled.
3602 * (in_irq() || irqs_disabled())
3604 * We provide four helpers that can be used in following contexts :
3606 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3607 * replacing kfree_skb(skb)
3609 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3610 * Typically used in place of consume_skb(skb) in TX completion path
3612 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3613 * replacing kfree_skb(skb)
3615 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3616 * and consumed a packet. Used in place of consume_skb(skb)
3618 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3620 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3623 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3625 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3628 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3630 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3633 static inline void dev_consume_skb_any(struct sk_buff *skb)
3635 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3638 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3639 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3640 int netif_rx(struct sk_buff *skb);
3641 int netif_rx_ni(struct sk_buff *skb);
3642 int netif_receive_skb(struct sk_buff *skb);
3643 int netif_receive_skb_core(struct sk_buff *skb);
3644 void netif_receive_skb_list(struct list_head *head);
3645 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3646 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3647 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3648 gro_result_t napi_gro_frags(struct napi_struct *napi);
3649 struct packet_offload *gro_find_receive_by_type(__be16 type);
3650 struct packet_offload *gro_find_complete_by_type(__be16 type);
3652 static inline void napi_free_frags(struct napi_struct *napi)
3654 kfree_skb(napi->skb);
3658 bool netdev_is_rx_handler_busy(struct net_device *dev);
3659 int netdev_rx_handler_register(struct net_device *dev,
3660 rx_handler_func_t *rx_handler,
3661 void *rx_handler_data);
3662 void netdev_rx_handler_unregister(struct net_device *dev);
3664 bool dev_valid_name(const char *name);
3665 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3666 bool *need_copyout);
3667 int dev_ifconf(struct net *net, struct ifconf *, int);
3668 int dev_ethtool(struct net *net, struct ifreq *);
3669 unsigned int dev_get_flags(const struct net_device *);
3670 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3671 struct netlink_ext_ack *extack);
3672 int dev_change_flags(struct net_device *dev, unsigned int flags,
3673 struct netlink_ext_ack *extack);
3674 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3675 unsigned int gchanges);
3676 int dev_change_name(struct net_device *, const char *);
3677 int dev_set_alias(struct net_device *, const char *, size_t);
3678 int dev_get_alias(const struct net_device *, char *, size_t);
3679 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3680 int __dev_set_mtu(struct net_device *, int);
3681 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3682 struct netlink_ext_ack *extack);
3683 int dev_set_mtu(struct net_device *, int);
3684 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3685 void dev_set_group(struct net_device *, int);
3686 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3687 struct netlink_ext_ack *extack);
3688 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3689 struct netlink_ext_ack *extack);
3690 int dev_change_carrier(struct net_device *, bool new_carrier);
3691 int dev_get_phys_port_id(struct net_device *dev,
3692 struct netdev_phys_item_id *ppid);
3693 int dev_get_phys_port_name(struct net_device *dev,
3694 char *name, size_t len);
3695 int dev_get_port_parent_id(struct net_device *dev,
3696 struct netdev_phys_item_id *ppid, bool recurse);
3697 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3698 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3699 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3700 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3701 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3702 struct netdev_queue *txq, int *ret);
3704 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3705 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3707 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3708 enum bpf_netdev_command cmd);
3709 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3711 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3712 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3713 bool is_skb_forwardable(const struct net_device *dev,
3714 const struct sk_buff *skb);
3716 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3717 struct sk_buff *skb)
3719 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3720 unlikely(!is_skb_forwardable(dev, skb))) {
3721 atomic_long_inc(&dev->rx_dropped);
3726 skb_scrub_packet(skb, true);
3731 bool dev_nit_active(struct net_device *dev);
3732 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3734 extern int netdev_budget;
3735 extern unsigned int netdev_budget_usecs;
3737 /* Called by rtnetlink.c:rtnl_unlock() */
3738 void netdev_run_todo(void);
3741 * dev_put - release reference to device
3742 * @dev: network device
3744 * Release reference to device to allow it to be freed.
3746 static inline void dev_put(struct net_device *dev)
3748 this_cpu_dec(*dev->pcpu_refcnt);
3752 * dev_hold - get reference to device
3753 * @dev: network device
3755 * Hold reference to device to keep it from being freed.
3757 static inline void dev_hold(struct net_device *dev)
3759 this_cpu_inc(*dev->pcpu_refcnt);
3762 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3763 * and _off may be called from IRQ context, but it is caller
3764 * who is responsible for serialization of these calls.
3766 * The name carrier is inappropriate, these functions should really be
3767 * called netif_lowerlayer_*() because they represent the state of any
3768 * kind of lower layer not just hardware media.
3771 void linkwatch_init_dev(struct net_device *dev);
3772 void linkwatch_fire_event(struct net_device *dev);
3773 void linkwatch_forget_dev(struct net_device *dev);
3776 * netif_carrier_ok - test if carrier present
3777 * @dev: network device
3779 * Check if carrier is present on device
3781 static inline bool netif_carrier_ok(const struct net_device *dev)
3783 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3786 unsigned long dev_trans_start(struct net_device *dev);
3788 void __netdev_watchdog_up(struct net_device *dev);
3790 void netif_carrier_on(struct net_device *dev);
3792 void netif_carrier_off(struct net_device *dev);
3795 * netif_dormant_on - mark device as dormant.
3796 * @dev: network device
3798 * Mark device as dormant (as per RFC2863).
3800 * The dormant state indicates that the relevant interface is not
3801 * actually in a condition to pass packets (i.e., it is not 'up') but is
3802 * in a "pending" state, waiting for some external event. For "on-
3803 * demand" interfaces, this new state identifies the situation where the
3804 * interface is waiting for events to place it in the up state.
3806 static inline void netif_dormant_on(struct net_device *dev)
3808 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3809 linkwatch_fire_event(dev);
3813 * netif_dormant_off - set device as not dormant.
3814 * @dev: network device
3816 * Device is not in dormant state.
3818 static inline void netif_dormant_off(struct net_device *dev)
3820 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3821 linkwatch_fire_event(dev);
3825 * netif_dormant - test if device is dormant
3826 * @dev: network device
3828 * Check if device is dormant.
3830 static inline bool netif_dormant(const struct net_device *dev)
3832 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3837 * netif_oper_up - test if device is operational
3838 * @dev: network device
3840 * Check if carrier is operational
3842 static inline bool netif_oper_up(const struct net_device *dev)
3844 return (dev->operstate == IF_OPER_UP ||
3845 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3849 * netif_device_present - is device available or removed
3850 * @dev: network device
3852 * Check if device has not been removed from system.
3854 static inline bool netif_device_present(struct net_device *dev)
3856 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3859 void netif_device_detach(struct net_device *dev);
3861 void netif_device_attach(struct net_device *dev);
3864 * Network interface message level settings
3868 NETIF_MSG_DRV = 0x0001,
3869 NETIF_MSG_PROBE = 0x0002,
3870 NETIF_MSG_LINK = 0x0004,
3871 NETIF_MSG_TIMER = 0x0008,
3872 NETIF_MSG_IFDOWN = 0x0010,
3873 NETIF_MSG_IFUP = 0x0020,
3874 NETIF_MSG_RX_ERR = 0x0040,
3875 NETIF_MSG_TX_ERR = 0x0080,
3876 NETIF_MSG_TX_QUEUED = 0x0100,
3877 NETIF_MSG_INTR = 0x0200,
3878 NETIF_MSG_TX_DONE = 0x0400,
3879 NETIF_MSG_RX_STATUS = 0x0800,
3880 NETIF_MSG_PKTDATA = 0x1000,
3881 NETIF_MSG_HW = 0x2000,
3882 NETIF_MSG_WOL = 0x4000,
3885 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3886 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3887 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3888 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3889 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3890 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3891 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3892 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3893 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3894 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3895 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3896 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3897 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3898 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3899 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3901 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3904 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3905 return default_msg_enable_bits;
3906 if (debug_value == 0) /* no output */
3908 /* set low N bits */
3909 return (1U << debug_value) - 1;
3912 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3914 spin_lock(&txq->_xmit_lock);
3915 txq->xmit_lock_owner = cpu;
3918 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3920 __acquire(&txq->_xmit_lock);
3924 static inline void __netif_tx_release(struct netdev_queue *txq)
3926 __release(&txq->_xmit_lock);
3929 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3931 spin_lock_bh(&txq->_xmit_lock);
3932 txq->xmit_lock_owner = smp_processor_id();
3935 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3937 bool ok = spin_trylock(&txq->_xmit_lock);
3939 txq->xmit_lock_owner = smp_processor_id();
3943 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3945 txq->xmit_lock_owner = -1;
3946 spin_unlock(&txq->_xmit_lock);
3949 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3951 txq->xmit_lock_owner = -1;
3952 spin_unlock_bh(&txq->_xmit_lock);
3955 static inline void txq_trans_update(struct netdev_queue *txq)
3957 if (txq->xmit_lock_owner != -1)
3958 txq->trans_start = jiffies;
3961 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3962 static inline void netif_trans_update(struct net_device *dev)
3964 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3966 if (txq->trans_start != jiffies)
3967 txq->trans_start = jiffies;
3971 * netif_tx_lock - grab network device transmit lock
3972 * @dev: network device
3974 * Get network device transmit lock
3976 static inline void netif_tx_lock(struct net_device *dev)
3981 spin_lock(&dev->tx_global_lock);
3982 cpu = smp_processor_id();
3983 for (i = 0; i < dev->num_tx_queues; i++) {
3984 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3986 /* We are the only thread of execution doing a
3987 * freeze, but we have to grab the _xmit_lock in
3988 * order to synchronize with threads which are in
3989 * the ->hard_start_xmit() handler and already
3990 * checked the frozen bit.
3992 __netif_tx_lock(txq, cpu);
3993 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3994 __netif_tx_unlock(txq);
3998 static inline void netif_tx_lock_bh(struct net_device *dev)
4004 static inline void netif_tx_unlock(struct net_device *dev)
4008 for (i = 0; i < dev->num_tx_queues; i++) {
4009 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4011 /* No need to grab the _xmit_lock here. If the
4012 * queue is not stopped for another reason, we
4015 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4016 netif_schedule_queue(txq);
4018 spin_unlock(&dev->tx_global_lock);
4021 static inline void netif_tx_unlock_bh(struct net_device *dev)
4023 netif_tx_unlock(dev);
4027 #define HARD_TX_LOCK(dev, txq, cpu) { \
4028 if ((dev->features & NETIF_F_LLTX) == 0) { \
4029 __netif_tx_lock(txq, cpu); \
4031 __netif_tx_acquire(txq); \
4035 #define HARD_TX_TRYLOCK(dev, txq) \
4036 (((dev->features & NETIF_F_LLTX) == 0) ? \
4037 __netif_tx_trylock(txq) : \
4038 __netif_tx_acquire(txq))
4040 #define HARD_TX_UNLOCK(dev, txq) { \
4041 if ((dev->features & NETIF_F_LLTX) == 0) { \
4042 __netif_tx_unlock(txq); \
4044 __netif_tx_release(txq); \
4048 static inline void netif_tx_disable(struct net_device *dev)
4054 cpu = smp_processor_id();
4055 for (i = 0; i < dev->num_tx_queues; i++) {
4056 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4058 __netif_tx_lock(txq, cpu);
4059 netif_tx_stop_queue(txq);
4060 __netif_tx_unlock(txq);
4065 static inline void netif_addr_lock(struct net_device *dev)
4067 spin_lock(&dev->addr_list_lock);
4070 static inline void netif_addr_lock_bh(struct net_device *dev)
4072 spin_lock_bh(&dev->addr_list_lock);
4075 static inline void netif_addr_unlock(struct net_device *dev)
4077 spin_unlock(&dev->addr_list_lock);
4080 static inline void netif_addr_unlock_bh(struct net_device *dev)
4082 spin_unlock_bh(&dev->addr_list_lock);
4086 * dev_addrs walker. Should be used only for read access. Call with
4087 * rcu_read_lock held.
4089 #define for_each_dev_addr(dev, ha) \
4090 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4092 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4094 void ether_setup(struct net_device *dev);
4096 /* Support for loadable net-drivers */
4097 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4098 unsigned char name_assign_type,
4099 void (*setup)(struct net_device *),
4100 unsigned int txqs, unsigned int rxqs);
4101 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4102 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4104 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4105 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4108 int register_netdev(struct net_device *dev);
4109 void unregister_netdev(struct net_device *dev);
4111 /* General hardware address lists handling functions */
4112 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4113 struct netdev_hw_addr_list *from_list, int addr_len);
4114 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4115 struct netdev_hw_addr_list *from_list, int addr_len);
4116 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4117 struct net_device *dev,
4118 int (*sync)(struct net_device *, const unsigned char *),
4119 int (*unsync)(struct net_device *,
4120 const unsigned char *));
4121 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4122 struct net_device *dev,
4123 int (*sync)(struct net_device *,
4124 const unsigned char *, int),
4125 int (*unsync)(struct net_device *,
4126 const unsigned char *, int));
4127 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4128 struct net_device *dev,
4129 int (*unsync)(struct net_device *,
4130 const unsigned char *, int));
4131 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4132 struct net_device *dev,
4133 int (*unsync)(struct net_device *,
4134 const unsigned char *));
4135 void __hw_addr_init(struct netdev_hw_addr_list *list);
4137 /* Functions used for device addresses handling */
4138 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4139 unsigned char addr_type);
4140 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4141 unsigned char addr_type);
4142 void dev_addr_flush(struct net_device *dev);
4143 int dev_addr_init(struct net_device *dev);
4145 /* Functions used for unicast addresses handling */
4146 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4147 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4148 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4149 int dev_uc_sync(struct net_device *to, struct net_device *from);
4150 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4151 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4152 void dev_uc_flush(struct net_device *dev);
4153 void dev_uc_init(struct net_device *dev);
4156 * __dev_uc_sync - Synchonize device's unicast list
4157 * @dev: device to sync
4158 * @sync: function to call if address should be added
4159 * @unsync: function to call if address should be removed
4161 * Add newly added addresses to the interface, and release
4162 * addresses that have been deleted.
4164 static inline int __dev_uc_sync(struct net_device *dev,
4165 int (*sync)(struct net_device *,
4166 const unsigned char *),
4167 int (*unsync)(struct net_device *,
4168 const unsigned char *))
4170 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4174 * __dev_uc_unsync - Remove synchronized addresses from device
4175 * @dev: device to sync
4176 * @unsync: function to call if address should be removed
4178 * Remove all addresses that were added to the device by dev_uc_sync().
4180 static inline void __dev_uc_unsync(struct net_device *dev,
4181 int (*unsync)(struct net_device *,
4182 const unsigned char *))
4184 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4187 /* Functions used for multicast addresses handling */
4188 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4189 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4190 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4191 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4192 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4193 int dev_mc_sync(struct net_device *to, struct net_device *from);
4194 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4195 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4196 void dev_mc_flush(struct net_device *dev);
4197 void dev_mc_init(struct net_device *dev);
4200 * __dev_mc_sync - Synchonize device's multicast list
4201 * @dev: device to sync
4202 * @sync: function to call if address should be added
4203 * @unsync: function to call if address should be removed
4205 * Add newly added addresses to the interface, and release
4206 * addresses that have been deleted.
4208 static inline int __dev_mc_sync(struct net_device *dev,
4209 int (*sync)(struct net_device *,
4210 const unsigned char *),
4211 int (*unsync)(struct net_device *,
4212 const unsigned char *))
4214 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4218 * __dev_mc_unsync - Remove synchronized addresses from device
4219 * @dev: device to sync
4220 * @unsync: function to call if address should be removed
4222 * Remove all addresses that were added to the device by dev_mc_sync().
4224 static inline void __dev_mc_unsync(struct net_device *dev,
4225 int (*unsync)(struct net_device *,
4226 const unsigned char *))
4228 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4231 /* Functions used for secondary unicast and multicast support */
4232 void dev_set_rx_mode(struct net_device *dev);
4233 void __dev_set_rx_mode(struct net_device *dev);
4234 int dev_set_promiscuity(struct net_device *dev, int inc);
4235 int dev_set_allmulti(struct net_device *dev, int inc);
4236 void netdev_state_change(struct net_device *dev);
4237 void netdev_notify_peers(struct net_device *dev);
4238 void netdev_features_change(struct net_device *dev);
4239 /* Load a device via the kmod */
4240 void dev_load(struct net *net, const char *name);
4241 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4242 struct rtnl_link_stats64 *storage);
4243 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4244 const struct net_device_stats *netdev_stats);
4246 extern int netdev_max_backlog;
4247 extern int netdev_tstamp_prequeue;
4248 extern int weight_p;
4249 extern int dev_weight_rx_bias;
4250 extern int dev_weight_tx_bias;
4251 extern int dev_rx_weight;
4252 extern int dev_tx_weight;
4253 extern int gro_normal_batch;
4255 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4256 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4257 struct list_head **iter);
4258 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4259 struct list_head **iter);
4261 /* iterate through upper list, must be called under RCU read lock */
4262 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4263 for (iter = &(dev)->adj_list.upper, \
4264 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4266 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4268 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4269 int (*fn)(struct net_device *upper_dev,
4273 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4274 struct net_device *upper_dev);
4276 bool netdev_has_any_upper_dev(struct net_device *dev);
4278 void *netdev_lower_get_next_private(struct net_device *dev,
4279 struct list_head **iter);
4280 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4281 struct list_head **iter);
4283 #define netdev_for_each_lower_private(dev, priv, iter) \
4284 for (iter = (dev)->adj_list.lower.next, \
4285 priv = netdev_lower_get_next_private(dev, &(iter)); \
4287 priv = netdev_lower_get_next_private(dev, &(iter)))
4289 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4290 for (iter = &(dev)->adj_list.lower, \
4291 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4293 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4295 void *netdev_lower_get_next(struct net_device *dev,
4296 struct list_head **iter);
4298 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4299 for (iter = (dev)->adj_list.lower.next, \
4300 ldev = netdev_lower_get_next(dev, &(iter)); \
4302 ldev = netdev_lower_get_next(dev, &(iter)))
4304 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4305 struct list_head **iter);
4306 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4307 struct list_head **iter);
4309 int netdev_walk_all_lower_dev(struct net_device *dev,
4310 int (*fn)(struct net_device *lower_dev,
4313 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4314 int (*fn)(struct net_device *lower_dev,
4318 void *netdev_adjacent_get_private(struct list_head *adj_list);
4319 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4320 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4321 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4322 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4323 struct netlink_ext_ack *extack);
4324 int netdev_master_upper_dev_link(struct net_device *dev,
4325 struct net_device *upper_dev,
4326 void *upper_priv, void *upper_info,
4327 struct netlink_ext_ack *extack);
4328 void netdev_upper_dev_unlink(struct net_device *dev,
4329 struct net_device *upper_dev);
4330 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4331 struct net_device *new_dev,
4332 struct net_device *dev,
4333 struct netlink_ext_ack *extack);
4334 void netdev_adjacent_change_commit(struct net_device *old_dev,
4335 struct net_device *new_dev,
4336 struct net_device *dev);
4337 void netdev_adjacent_change_abort(struct net_device *old_dev,
4338 struct net_device *new_dev,
4339 struct net_device *dev);
4340 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4341 void *netdev_lower_dev_get_private(struct net_device *dev,
4342 struct net_device *lower_dev);
4343 void netdev_lower_state_changed(struct net_device *lower_dev,
4344 void *lower_state_info);
4346 /* RSS keys are 40 or 52 bytes long */
4347 #define NETDEV_RSS_KEY_LEN 52
4348 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4349 void netdev_rss_key_fill(void *buffer, size_t len);
4351 int skb_checksum_help(struct sk_buff *skb);
4352 int skb_crc32c_csum_help(struct sk_buff *skb);
4353 int skb_csum_hwoffload_help(struct sk_buff *skb,
4354 const netdev_features_t features);
4356 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4357 netdev_features_t features, bool tx_path);
4358 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4359 netdev_features_t features);
4361 struct netdev_bonding_info {
4366 struct netdev_notifier_bonding_info {
4367 struct netdev_notifier_info info; /* must be first */
4368 struct netdev_bonding_info bonding_info;
4371 void netdev_bonding_info_change(struct net_device *dev,
4372 struct netdev_bonding_info *bonding_info);
4375 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4377 return __skb_gso_segment(skb, features, true);
4379 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4381 static inline bool can_checksum_protocol(netdev_features_t features,
4384 if (protocol == htons(ETH_P_FCOE))
4385 return !!(features & NETIF_F_FCOE_CRC);
4387 /* Assume this is an IP checksum (not SCTP CRC) */
4389 if (features & NETIF_F_HW_CSUM) {
4390 /* Can checksum everything */
4395 case htons(ETH_P_IP):
4396 return !!(features & NETIF_F_IP_CSUM);
4397 case htons(ETH_P_IPV6):
4398 return !!(features & NETIF_F_IPV6_CSUM);
4405 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4407 static inline void netdev_rx_csum_fault(struct net_device *dev,
4408 struct sk_buff *skb)
4412 /* rx skb timestamps */
4413 void net_enable_timestamp(void);
4414 void net_disable_timestamp(void);
4416 #ifdef CONFIG_PROC_FS
4417 int __init dev_proc_init(void);
4419 #define dev_proc_init() 0
4422 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4423 struct sk_buff *skb, struct net_device *dev,
4426 __this_cpu_write(softnet_data.xmit.more, more);
4427 return ops->ndo_start_xmit(skb, dev);
4430 static inline bool netdev_xmit_more(void)
4432 return __this_cpu_read(softnet_data.xmit.more);
4435 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4436 struct netdev_queue *txq, bool more)
4438 const struct net_device_ops *ops = dev->netdev_ops;
4441 rc = __netdev_start_xmit(ops, skb, dev, more);
4442 if (rc == NETDEV_TX_OK)
4443 txq_trans_update(txq);
4448 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4450 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4453 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4455 return netdev_class_create_file_ns(class_attr, NULL);
4458 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4460 netdev_class_remove_file_ns(class_attr, NULL);
4463 extern const struct kobj_ns_type_operations net_ns_type_operations;
4465 const char *netdev_drivername(const struct net_device *dev);
4467 void linkwatch_run_queue(void);
4469 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4470 netdev_features_t f2)
4472 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4473 if (f1 & NETIF_F_HW_CSUM)
4474 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4476 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4482 static inline netdev_features_t netdev_get_wanted_features(
4483 struct net_device *dev)
4485 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4487 netdev_features_t netdev_increment_features(netdev_features_t all,
4488 netdev_features_t one, netdev_features_t mask);
4490 /* Allow TSO being used on stacked device :
4491 * Performing the GSO segmentation before last device
4492 * is a performance improvement.
4494 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4495 netdev_features_t mask)
4497 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4500 int __netdev_update_features(struct net_device *dev);
4501 void netdev_update_features(struct net_device *dev);
4502 void netdev_change_features(struct net_device *dev);
4504 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4505 struct net_device *dev);
4507 netdev_features_t passthru_features_check(struct sk_buff *skb,
4508 struct net_device *dev,
4509 netdev_features_t features);
4510 netdev_features_t netif_skb_features(struct sk_buff *skb);
4512 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4514 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4516 /* check flags correspondence */
4517 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4518 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4519 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4520 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4521 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4522 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4523 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4524 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4525 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4526 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4527 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4528 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4529 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4530 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4531 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4532 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4533 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4534 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4536 return (features & feature) == feature;
4539 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4541 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4542 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4545 static inline bool netif_needs_gso(struct sk_buff *skb,
4546 netdev_features_t features)
4548 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4549 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4550 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4553 static inline void netif_set_gso_max_size(struct net_device *dev,
4556 dev->gso_max_size = size;
4559 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4560 int pulled_hlen, u16 mac_offset,
4563 skb->protocol = protocol;
4564 skb->encapsulation = 1;
4565 skb_push(skb, pulled_hlen);
4566 skb_reset_transport_header(skb);
4567 skb->mac_header = mac_offset;
4568 skb->network_header = skb->mac_header + mac_len;
4569 skb->mac_len = mac_len;
4572 static inline bool netif_is_macsec(const struct net_device *dev)
4574 return dev->priv_flags & IFF_MACSEC;
4577 static inline bool netif_is_macvlan(const struct net_device *dev)
4579 return dev->priv_flags & IFF_MACVLAN;
4582 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4584 return dev->priv_flags & IFF_MACVLAN_PORT;
4587 static inline bool netif_is_bond_master(const struct net_device *dev)
4589 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4592 static inline bool netif_is_bond_slave(const struct net_device *dev)
4594 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4597 static inline bool netif_supports_nofcs(struct net_device *dev)
4599 return dev->priv_flags & IFF_SUPP_NOFCS;
4602 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4604 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4607 static inline bool netif_is_l3_master(const struct net_device *dev)
4609 return dev->priv_flags & IFF_L3MDEV_MASTER;
4612 static inline bool netif_is_l3_slave(const struct net_device *dev)
4614 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4617 static inline bool netif_is_bridge_master(const struct net_device *dev)
4619 return dev->priv_flags & IFF_EBRIDGE;
4622 static inline bool netif_is_bridge_port(const struct net_device *dev)
4624 return dev->priv_flags & IFF_BRIDGE_PORT;
4627 static inline bool netif_is_ovs_master(const struct net_device *dev)
4629 return dev->priv_flags & IFF_OPENVSWITCH;
4632 static inline bool netif_is_ovs_port(const struct net_device *dev)
4634 return dev->priv_flags & IFF_OVS_DATAPATH;
4637 static inline bool netif_is_team_master(const struct net_device *dev)
4639 return dev->priv_flags & IFF_TEAM;
4642 static inline bool netif_is_team_port(const struct net_device *dev)
4644 return dev->priv_flags & IFF_TEAM_PORT;
4647 static inline bool netif_is_lag_master(const struct net_device *dev)
4649 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4652 static inline bool netif_is_lag_port(const struct net_device *dev)
4654 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4657 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4659 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4662 static inline bool netif_is_failover(const struct net_device *dev)
4664 return dev->priv_flags & IFF_FAILOVER;
4667 static inline bool netif_is_failover_slave(const struct net_device *dev)
4669 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4672 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4673 static inline void netif_keep_dst(struct net_device *dev)
4675 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4678 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4679 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4681 /* TODO: reserve and use an additional IFF bit, if we get more users */
4682 return dev->priv_flags & IFF_MACSEC;
4685 extern struct pernet_operations __net_initdata loopback_net_ops;
4687 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4689 /* netdev_printk helpers, similar to dev_printk */
4691 static inline const char *netdev_name(const struct net_device *dev)
4693 if (!dev->name[0] || strchr(dev->name, '%'))
4694 return "(unnamed net_device)";
4698 static inline bool netdev_unregistering(const struct net_device *dev)
4700 return dev->reg_state == NETREG_UNREGISTERING;
4703 static inline const char *netdev_reg_state(const struct net_device *dev)
4705 switch (dev->reg_state) {
4706 case NETREG_UNINITIALIZED: return " (uninitialized)";
4707 case NETREG_REGISTERED: return "";
4708 case NETREG_UNREGISTERING: return " (unregistering)";
4709 case NETREG_UNREGISTERED: return " (unregistered)";
4710 case NETREG_RELEASED: return " (released)";
4711 case NETREG_DUMMY: return " (dummy)";
4714 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4715 return " (unknown)";
4718 __printf(3, 4) __cold
4719 void netdev_printk(const char *level, const struct net_device *dev,
4720 const char *format, ...);
4721 __printf(2, 3) __cold
4722 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4723 __printf(2, 3) __cold
4724 void netdev_alert(const struct net_device *dev, const char *format, ...);
4725 __printf(2, 3) __cold
4726 void netdev_crit(const struct net_device *dev, const char *format, ...);
4727 __printf(2, 3) __cold
4728 void netdev_err(const struct net_device *dev, const char *format, ...);
4729 __printf(2, 3) __cold
4730 void netdev_warn(const struct net_device *dev, const char *format, ...);
4731 __printf(2, 3) __cold
4732 void netdev_notice(const struct net_device *dev, const char *format, ...);
4733 __printf(2, 3) __cold
4734 void netdev_info(const struct net_device *dev, const char *format, ...);
4736 #define netdev_level_once(level, dev, fmt, ...) \
4738 static bool __print_once __read_mostly; \
4740 if (!__print_once) { \
4741 __print_once = true; \
4742 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4746 #define netdev_emerg_once(dev, fmt, ...) \
4747 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4748 #define netdev_alert_once(dev, fmt, ...) \
4749 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4750 #define netdev_crit_once(dev, fmt, ...) \
4751 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4752 #define netdev_err_once(dev, fmt, ...) \
4753 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4754 #define netdev_warn_once(dev, fmt, ...) \
4755 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4756 #define netdev_notice_once(dev, fmt, ...) \
4757 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4758 #define netdev_info_once(dev, fmt, ...) \
4759 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4761 #define MODULE_ALIAS_NETDEV(device) \
4762 MODULE_ALIAS("netdev-" device)
4764 #if defined(CONFIG_DYNAMIC_DEBUG)
4765 #define netdev_dbg(__dev, format, args...) \
4767 dynamic_netdev_dbg(__dev, format, ##args); \
4769 #elif defined(DEBUG)
4770 #define netdev_dbg(__dev, format, args...) \
4771 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4773 #define netdev_dbg(__dev, format, args...) \
4776 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4780 #if defined(VERBOSE_DEBUG)
4781 #define netdev_vdbg netdev_dbg
4784 #define netdev_vdbg(dev, format, args...) \
4787 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4793 * netdev_WARN() acts like dev_printk(), but with the key difference
4794 * of using a WARN/WARN_ON to get the message out, including the
4795 * file/line information and a backtrace.
4797 #define netdev_WARN(dev, format, args...) \
4798 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4799 netdev_reg_state(dev), ##args)
4801 #define netdev_WARN_ONCE(dev, format, args...) \
4802 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4803 netdev_reg_state(dev), ##args)
4805 /* netif printk helpers, similar to netdev_printk */
4807 #define netif_printk(priv, type, level, dev, fmt, args...) \
4809 if (netif_msg_##type(priv)) \
4810 netdev_printk(level, (dev), fmt, ##args); \
4813 #define netif_level(level, priv, type, dev, fmt, args...) \
4815 if (netif_msg_##type(priv)) \
4816 netdev_##level(dev, fmt, ##args); \
4819 #define netif_emerg(priv, type, dev, fmt, args...) \
4820 netif_level(emerg, priv, type, dev, fmt, ##args)
4821 #define netif_alert(priv, type, dev, fmt, args...) \
4822 netif_level(alert, priv, type, dev, fmt, ##args)
4823 #define netif_crit(priv, type, dev, fmt, args...) \
4824 netif_level(crit, priv, type, dev, fmt, ##args)
4825 #define netif_err(priv, type, dev, fmt, args...) \
4826 netif_level(err, priv, type, dev, fmt, ##args)
4827 #define netif_warn(priv, type, dev, fmt, args...) \
4828 netif_level(warn, priv, type, dev, fmt, ##args)
4829 #define netif_notice(priv, type, dev, fmt, args...) \
4830 netif_level(notice, priv, type, dev, fmt, ##args)
4831 #define netif_info(priv, type, dev, fmt, args...) \
4832 netif_level(info, priv, type, dev, fmt, ##args)
4834 #if defined(CONFIG_DYNAMIC_DEBUG)
4835 #define netif_dbg(priv, type, netdev, format, args...) \
4837 if (netif_msg_##type(priv)) \
4838 dynamic_netdev_dbg(netdev, format, ##args); \
4840 #elif defined(DEBUG)
4841 #define netif_dbg(priv, type, dev, format, args...) \
4842 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4844 #define netif_dbg(priv, type, dev, format, args...) \
4847 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4852 /* if @cond then downgrade to debug, else print at @level */
4853 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4856 netif_dbg(priv, type, netdev, fmt, ##args); \
4858 netif_ ## level(priv, type, netdev, fmt, ##args); \
4861 #if defined(VERBOSE_DEBUG)
4862 #define netif_vdbg netif_dbg
4864 #define netif_vdbg(priv, type, dev, format, args...) \
4867 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4873 * The list of packet types we will receive (as opposed to discard)
4874 * and the routines to invoke.
4876 * Why 16. Because with 16 the only overlap we get on a hash of the
4877 * low nibble of the protocol value is RARP/SNAP/X.25.
4891 #define PTYPE_HASH_SIZE (16)
4892 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4894 extern struct net_device *blackhole_netdev;
4896 #endif /* _LINUX_NETDEVICE_H */