2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/timer.h>
29 #include <linux/bug.h>
30 #include <linux/delay.h>
31 #include <linux/atomic.h>
32 #include <linux/prefetch.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/workqueue.h>
39 #include <linux/dynamic_queue_limits.h>
41 #include <linux/ethtool.h>
42 #include <net/net_namespace.h>
44 #include <net/dcbnl.h>
46 #include <net/netprio_cgroup.h>
49 #include <linux/netdev_features.h>
50 #include <linux/neighbour.h>
51 #include <uapi/linux/netdevice.h>
52 #include <uapi/linux/if_bonding.h>
53 #include <uapi/linux/pkt_cls.h>
54 #include <linux/hashtable.h>
64 /* 802.15.4 specific */
67 /* UDP Tunnel offloads */
68 struct udp_tunnel_info;
72 void netdev_set_default_ethtool_ops(struct net_device *dev,
73 const struct ethtool_ops *ops);
75 /* Backlog congestion levels */
76 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
77 #define NET_RX_DROP 1 /* packet dropped */
80 * Transmit return codes: transmit return codes originate from three different
83 * - qdisc return codes
84 * - driver transmit return codes
87 * Drivers are allowed to return any one of those in their hard_start_xmit()
88 * function. Real network devices commonly used with qdiscs should only return
89 * the driver transmit return codes though - when qdiscs are used, the actual
90 * transmission happens asynchronously, so the value is not propagated to
91 * higher layers. Virtual network devices transmit synchronously; in this case
92 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
93 * others are propagated to higher layers.
96 /* qdisc ->enqueue() return codes. */
97 #define NET_XMIT_SUCCESS 0x00
98 #define NET_XMIT_DROP 0x01 /* skb dropped */
99 #define NET_XMIT_CN 0x02 /* congestion notification */
100 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
102 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
103 * indicates that the device will soon be dropping packets, or already drops
104 * some packets of the same priority; prompting us to send less aggressively. */
105 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
106 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
108 /* Driver transmit return codes */
109 #define NETDEV_TX_MASK 0xf0
112 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
113 NETDEV_TX_OK = 0x00, /* driver took care of packet */
114 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
116 typedef enum netdev_tx netdev_tx_t;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc < NET_XMIT_MASK))
137 * Compute the worst-case header length according to the protocols
141 #if defined(CONFIG_HYPERV_NET)
142 # define LL_MAX_HEADER 128
143 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
144 # if defined(CONFIG_MAC80211_MESH)
145 # define LL_MAX_HEADER 128
147 # define LL_MAX_HEADER 96
150 # define LL_MAX_HEADER 32
153 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
154 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
155 #define MAX_HEADER LL_MAX_HEADER
157 #define MAX_HEADER (LL_MAX_HEADER + 48)
161 * Old network device statistics. Fields are native words
162 * (unsigned long) so they can be read and written atomically.
165 struct net_device_stats {
166 unsigned long rx_packets;
167 unsigned long tx_packets;
168 unsigned long rx_bytes;
169 unsigned long tx_bytes;
170 unsigned long rx_errors;
171 unsigned long tx_errors;
172 unsigned long rx_dropped;
173 unsigned long tx_dropped;
174 unsigned long multicast;
175 unsigned long collisions;
176 unsigned long rx_length_errors;
177 unsigned long rx_over_errors;
178 unsigned long rx_crc_errors;
179 unsigned long rx_frame_errors;
180 unsigned long rx_fifo_errors;
181 unsigned long rx_missed_errors;
182 unsigned long tx_aborted_errors;
183 unsigned long tx_carrier_errors;
184 unsigned long tx_fifo_errors;
185 unsigned long tx_heartbeat_errors;
186 unsigned long tx_window_errors;
187 unsigned long rx_compressed;
188 unsigned long tx_compressed;
192 #include <linux/cache.h>
193 #include <linux/skbuff.h>
196 #include <linux/static_key.h>
197 extern struct static_key rps_needed;
198 extern struct static_key rfs_needed;
205 struct netdev_hw_addr {
206 struct list_head list;
207 unsigned char addr[MAX_ADDR_LEN];
209 #define NETDEV_HW_ADDR_T_LAN 1
210 #define NETDEV_HW_ADDR_T_SAN 2
211 #define NETDEV_HW_ADDR_T_SLAVE 3
212 #define NETDEV_HW_ADDR_T_UNICAST 4
213 #define NETDEV_HW_ADDR_T_MULTICAST 5
218 struct rcu_head rcu_head;
221 struct netdev_hw_addr_list {
222 struct list_head list;
226 #define netdev_hw_addr_list_count(l) ((l)->count)
227 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
228 #define netdev_hw_addr_list_for_each(ha, l) \
229 list_for_each_entry(ha, &(l)->list, list)
231 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
232 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
233 #define netdev_for_each_uc_addr(ha, dev) \
234 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
236 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
237 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
238 #define netdev_for_each_mc_addr(ha, dev) \
239 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
245 /* cached hardware header; allow for machine alignment needs. */
246 #define HH_DATA_MOD 16
247 #define HH_DATA_OFF(__len) \
248 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
249 #define HH_DATA_ALIGN(__len) \
250 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
251 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
254 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
256 * dev->hard_header_len ? (dev->hard_header_len +
257 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
259 * We could use other alignment values, but we must maintain the
260 * relationship HH alignment <= LL alignment.
262 #define LL_RESERVED_SPACE(dev) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
265 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
268 int (*create) (struct sk_buff *skb, struct net_device *dev,
269 unsigned short type, const void *daddr,
270 const void *saddr, unsigned int len);
271 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
272 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
273 void (*cache_update)(struct hh_cache *hh,
274 const struct net_device *dev,
275 const unsigned char *haddr);
276 bool (*validate)(const char *ll_header, unsigned int len);
279 /* These flag bits are private to the generic network queueing
280 * layer; they may not be explicitly referenced by any other
284 enum netdev_state_t {
286 __LINK_STATE_PRESENT,
287 __LINK_STATE_NOCARRIER,
288 __LINK_STATE_LINKWATCH_PENDING,
289 __LINK_STATE_DORMANT,
294 * This structure holds boot-time configured netdevice settings. They
295 * are then used in the device probing.
297 struct netdev_boot_setup {
301 #define NETDEV_BOOT_SETUP_MAX 8
303 int __init netdev_boot_setup(char *str);
306 * Structure for NAPI scheduling similar to tasklet but with weighting
309 /* The poll_list must only be managed by the entity which
310 * changes the state of the NAPI_STATE_SCHED bit. This means
311 * whoever atomically sets that bit can add this napi_struct
312 * to the per-CPU poll_list, and whoever clears that bit
313 * can remove from the list right before clearing the bit.
315 struct list_head poll_list;
319 unsigned int gro_count;
320 int (*poll)(struct napi_struct *, int);
321 #ifdef CONFIG_NETPOLL
324 struct net_device *dev;
325 struct sk_buff *gro_list;
327 struct hrtimer timer;
328 struct list_head dev_list;
329 struct hlist_node napi_hash_node;
330 unsigned int napi_id;
334 NAPI_STATE_SCHED, /* Poll is scheduled */
335 NAPI_STATE_MISSED, /* reschedule a napi */
336 NAPI_STATE_DISABLE, /* Disable pending */
337 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
338 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
339 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
340 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
344 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
345 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
346 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
347 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
348 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
349 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
350 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
361 typedef enum gro_result gro_result_t;
364 * enum rx_handler_result - Possible return values for rx_handlers.
365 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
367 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
368 * case skb->dev was changed by rx_handler.
369 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
370 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
372 * rx_handlers are functions called from inside __netif_receive_skb(), to do
373 * special processing of the skb, prior to delivery to protocol handlers.
375 * Currently, a net_device can only have a single rx_handler registered. Trying
376 * to register a second rx_handler will return -EBUSY.
378 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
379 * To unregister a rx_handler on a net_device, use
380 * netdev_rx_handler_unregister().
382 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
385 * If the rx_handler consumed the skb in some way, it should return
386 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
387 * the skb to be delivered in some other way.
389 * If the rx_handler changed skb->dev, to divert the skb to another
390 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
391 * new device will be called if it exists.
393 * If the rx_handler decides the skb should be ignored, it should return
394 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
395 * are registered on exact device (ptype->dev == skb->dev).
397 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
398 * delivered, it should return RX_HANDLER_PASS.
400 * A device without a registered rx_handler will behave as if rx_handler
401 * returned RX_HANDLER_PASS.
404 enum rx_handler_result {
410 typedef enum rx_handler_result rx_handler_result_t;
411 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
413 void __napi_schedule(struct napi_struct *n);
414 void __napi_schedule_irqoff(struct napi_struct *n);
416 static inline bool napi_disable_pending(struct napi_struct *n)
418 return test_bit(NAPI_STATE_DISABLE, &n->state);
421 bool napi_schedule_prep(struct napi_struct *n);
424 * napi_schedule - schedule NAPI poll
427 * Schedule NAPI poll routine to be called if it is not already
430 static inline void napi_schedule(struct napi_struct *n)
432 if (napi_schedule_prep(n))
437 * napi_schedule_irqoff - schedule NAPI poll
440 * Variant of napi_schedule(), assuming hard irqs are masked.
442 static inline void napi_schedule_irqoff(struct napi_struct *n)
444 if (napi_schedule_prep(n))
445 __napi_schedule_irqoff(n);
448 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
449 static inline bool napi_reschedule(struct napi_struct *napi)
451 if (napi_schedule_prep(napi)) {
452 __napi_schedule(napi);
458 bool napi_complete_done(struct napi_struct *n, int work_done);
460 * napi_complete - NAPI processing complete
463 * Mark NAPI processing as complete.
464 * Consider using napi_complete_done() instead.
465 * Return false if device should avoid rearming interrupts.
467 static inline bool napi_complete(struct napi_struct *n)
469 return napi_complete_done(n, 0);
473 * napi_hash_del - remove a NAPI from global table
474 * @napi: NAPI context
476 * Warning: caller must observe RCU grace period
477 * before freeing memory containing @napi, if
478 * this function returns true.
479 * Note: core networking stack automatically calls it
480 * from netif_napi_del().
481 * Drivers might want to call this helper to combine all
482 * the needed RCU grace periods into a single one.
484 bool napi_hash_del(struct napi_struct *napi);
487 * napi_disable - prevent NAPI from scheduling
490 * Stop NAPI from being scheduled on this context.
491 * Waits till any outstanding processing completes.
493 void napi_disable(struct napi_struct *n);
496 * napi_enable - enable NAPI scheduling
499 * Resume NAPI from being scheduled on this context.
500 * Must be paired with napi_disable.
502 static inline void napi_enable(struct napi_struct *n)
504 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
505 smp_mb__before_atomic();
506 clear_bit(NAPI_STATE_SCHED, &n->state);
507 clear_bit(NAPI_STATE_NPSVC, &n->state);
511 * napi_synchronize - wait until NAPI is not running
514 * Wait until NAPI is done being scheduled on this context.
515 * Waits till any outstanding processing completes but
516 * does not disable future activations.
518 static inline void napi_synchronize(const struct napi_struct *n)
520 if (IS_ENABLED(CONFIG_SMP))
521 while (test_bit(NAPI_STATE_SCHED, &n->state))
527 enum netdev_queue_state_t {
528 __QUEUE_STATE_DRV_XOFF,
529 __QUEUE_STATE_STACK_XOFF,
530 __QUEUE_STATE_FROZEN,
533 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
534 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
535 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
537 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
538 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
540 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
544 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
545 * netif_tx_* functions below are used to manipulate this flag. The
546 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
547 * queue independently. The netif_xmit_*stopped functions below are called
548 * to check if the queue has been stopped by the driver or stack (either
549 * of the XOFF bits are set in the state). Drivers should not need to call
550 * netif_xmit*stopped functions, they should only be using netif_tx_*.
553 struct netdev_queue {
557 struct net_device *dev;
558 struct Qdisc __rcu *qdisc;
559 struct Qdisc *qdisc_sleeping;
563 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
566 unsigned long tx_maxrate;
568 * Number of TX timeouts for this queue
569 * (/sys/class/net/DEV/Q/trans_timeout)
571 unsigned long trans_timeout;
575 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
578 * Time (in jiffies) of last Tx
580 unsigned long trans_start;
587 } ____cacheline_aligned_in_smp;
589 extern int sysctl_fb_tunnels_only_for_init_net;
591 static inline bool net_has_fallback_tunnels(const struct net *net)
593 return net == &init_net ||
594 !IS_ENABLED(CONFIG_SYSCTL) ||
595 !sysctl_fb_tunnels_only_for_init_net;
598 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
600 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
607 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
609 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
616 * This structure holds an RPS map which can be of variable length. The
617 * map is an array of CPUs.
624 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
627 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
628 * tail pointer for that CPU's input queue at the time of last enqueue, and
629 * a hardware filter index.
631 struct rps_dev_flow {
634 unsigned int last_qtail;
636 #define RPS_NO_FILTER 0xffff
639 * The rps_dev_flow_table structure contains a table of flow mappings.
641 struct rps_dev_flow_table {
644 struct rps_dev_flow flows[0];
646 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
647 ((_num) * sizeof(struct rps_dev_flow)))
650 * The rps_sock_flow_table contains mappings of flows to the last CPU
651 * on which they were processed by the application (set in recvmsg).
652 * Each entry is a 32bit value. Upper part is the high-order bits
653 * of flow hash, lower part is CPU number.
654 * rps_cpu_mask is used to partition the space, depending on number of
655 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
656 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
657 * meaning we use 32-6=26 bits for the hash.
659 struct rps_sock_flow_table {
662 u32 ents[0] ____cacheline_aligned_in_smp;
664 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
666 #define RPS_NO_CPU 0xffff
668 extern u32 rps_cpu_mask;
669 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
671 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
675 unsigned int index = hash & table->mask;
676 u32 val = hash & ~rps_cpu_mask;
678 /* We only give a hint, preemption can change CPU under us */
679 val |= raw_smp_processor_id();
681 if (table->ents[index] != val)
682 table->ents[index] = val;
686 #ifdef CONFIG_RFS_ACCEL
687 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
690 #endif /* CONFIG_RPS */
692 /* This structure contains an instance of an RX queue. */
693 struct netdev_rx_queue {
695 struct rps_map __rcu *rps_map;
696 struct rps_dev_flow_table __rcu *rps_flow_table;
699 struct net_device *dev;
700 struct xdp_rxq_info xdp_rxq;
701 } ____cacheline_aligned_in_smp;
704 * RX queue sysfs structures and functions.
706 struct rx_queue_attribute {
707 struct attribute attr;
708 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
709 ssize_t (*store)(struct netdev_rx_queue *queue,
710 const char *buf, size_t len);
715 * This structure holds an XPS map which can be of variable length. The
716 * map is an array of queues.
720 unsigned int alloc_len;
724 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
725 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
726 - sizeof(struct xps_map)) / sizeof(u16))
729 * This structure holds all XPS maps for device. Maps are indexed by CPU.
731 struct xps_dev_maps {
733 struct xps_map __rcu *cpu_map[0];
735 #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
736 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
737 #endif /* CONFIG_XPS */
739 #define TC_MAX_QUEUE 16
740 #define TC_BITMASK 15
741 /* HW offloaded queuing disciplines txq count and offset maps */
742 struct netdev_tc_txq {
747 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
749 * This structure is to hold information about the device
750 * configured to run FCoE protocol stack.
752 struct netdev_fcoe_hbainfo {
753 char manufacturer[64];
754 char serial_number[64];
755 char hardware_version[64];
756 char driver_version[64];
757 char optionrom_version[64];
758 char firmware_version[64];
760 char model_description[256];
764 #define MAX_PHYS_ITEM_ID_LEN 32
766 /* This structure holds a unique identifier to identify some
767 * physical item (port for example) used by a netdevice.
769 struct netdev_phys_item_id {
770 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
771 unsigned char id_len;
774 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
775 struct netdev_phys_item_id *b)
777 return a->id_len == b->id_len &&
778 memcmp(a->id, b->id, a->id_len) == 0;
781 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
782 struct sk_buff *skb);
785 TC_SETUP_QDISC_MQPRIO,
788 TC_SETUP_CLSMATCHALL,
796 /* These structures hold the attributes of bpf state that are being passed
797 * to the netdevice through the bpf op.
799 enum bpf_netdev_command {
800 /* Set or clear a bpf program used in the earliest stages of packet
801 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
802 * is responsible for calling bpf_prog_put on any old progs that are
803 * stored. In case of error, the callee need not release the new prog
804 * reference, but on success it takes ownership and must bpf_prog_put
805 * when it is no longer used.
809 /* Check if a bpf program is set on the device. The callee should
810 * set @prog_attached to one of XDP_ATTACHED_* values, note that "true"
811 * is equivalent to XDP_ATTACHED_DRV.
814 /* BPF program for offload callbacks, invoked at program load time. */
815 BPF_OFFLOAD_VERIFIER_PREP,
816 BPF_OFFLOAD_TRANSLATE,
818 BPF_OFFLOAD_MAP_ALLOC,
819 BPF_OFFLOAD_MAP_FREE,
822 struct bpf_prog_offload_ops;
823 struct netlink_ext_ack;
826 enum bpf_netdev_command command;
831 struct bpf_prog *prog;
832 struct netlink_ext_ack *extack;
838 /* flags with which program was installed */
841 /* BPF_OFFLOAD_VERIFIER_PREP */
843 struct bpf_prog *prog;
844 const struct bpf_prog_offload_ops *ops; /* callee set */
846 /* BPF_OFFLOAD_TRANSLATE, BPF_OFFLOAD_DESTROY */
848 struct bpf_prog *prog;
850 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
852 struct bpf_offloaded_map *offmap;
857 #ifdef CONFIG_XFRM_OFFLOAD
859 int (*xdo_dev_state_add) (struct xfrm_state *x);
860 void (*xdo_dev_state_delete) (struct xfrm_state *x);
861 void (*xdo_dev_state_free) (struct xfrm_state *x);
862 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
863 struct xfrm_state *x);
864 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
869 struct rcu_head rcuhead;
874 * This structure defines the management hooks for network devices.
875 * The following hooks can be defined; unless noted otherwise, they are
876 * optional and can be filled with a null pointer.
878 * int (*ndo_init)(struct net_device *dev);
879 * This function is called once when a network device is registered.
880 * The network device can use this for any late stage initialization
881 * or semantic validation. It can fail with an error code which will
882 * be propagated back to register_netdev.
884 * void (*ndo_uninit)(struct net_device *dev);
885 * This function is called when device is unregistered or when registration
886 * fails. It is not called if init fails.
888 * int (*ndo_open)(struct net_device *dev);
889 * This function is called when a network device transitions to the up
892 * int (*ndo_stop)(struct net_device *dev);
893 * This function is called when a network device transitions to the down
896 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
897 * struct net_device *dev);
898 * Called when a packet needs to be transmitted.
899 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
900 * the queue before that can happen; it's for obsolete devices and weird
901 * corner cases, but the stack really does a non-trivial amount
902 * of useless work if you return NETDEV_TX_BUSY.
903 * Required; cannot be NULL.
905 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
906 * struct net_device *dev
907 * netdev_features_t features);
908 * Called by core transmit path to determine if device is capable of
909 * performing offload operations on a given packet. This is to give
910 * the device an opportunity to implement any restrictions that cannot
911 * be otherwise expressed by feature flags. The check is called with
912 * the set of features that the stack has calculated and it returns
913 * those the driver believes to be appropriate.
915 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
916 * void *accel_priv, select_queue_fallback_t fallback);
917 * Called to decide which queue to use when device supports multiple
920 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
921 * This function is called to allow device receiver to make
922 * changes to configuration when multicast or promiscuous is enabled.
924 * void (*ndo_set_rx_mode)(struct net_device *dev);
925 * This function is called device changes address list filtering.
926 * If driver handles unicast address filtering, it should set
927 * IFF_UNICAST_FLT in its priv_flags.
929 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
930 * This function is called when the Media Access Control address
931 * needs to be changed. If this interface is not defined, the
932 * MAC address can not be changed.
934 * int (*ndo_validate_addr)(struct net_device *dev);
935 * Test if Media Access Control address is valid for the device.
937 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
938 * Called when a user requests an ioctl which can't be handled by
939 * the generic interface code. If not defined ioctls return
940 * not supported error code.
942 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
943 * Used to set network devices bus interface parameters. This interface
944 * is retained for legacy reasons; new devices should use the bus
945 * interface (PCI) for low level management.
947 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
948 * Called when a user wants to change the Maximum Transfer Unit
951 * void (*ndo_tx_timeout)(struct net_device *dev);
952 * Callback used when the transmitter has not made any progress
953 * for dev->watchdog ticks.
955 * void (*ndo_get_stats64)(struct net_device *dev,
956 * struct rtnl_link_stats64 *storage);
957 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
958 * Called when a user wants to get the network device usage
959 * statistics. Drivers must do one of the following:
960 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
961 * rtnl_link_stats64 structure passed by the caller.
962 * 2. Define @ndo_get_stats to update a net_device_stats structure
963 * (which should normally be dev->stats) and return a pointer to
964 * it. The structure may be changed asynchronously only if each
965 * field is written atomically.
966 * 3. Update dev->stats asynchronously and atomically, and define
969 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
970 * Return true if this device supports offload stats of this attr_id.
972 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
974 * Get statistics for offload operations by attr_id. Write it into the
977 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
978 * If device supports VLAN filtering this function is called when a
979 * VLAN id is registered.
981 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
982 * If device supports VLAN filtering this function is called when a
983 * VLAN id is unregistered.
985 * void (*ndo_poll_controller)(struct net_device *dev);
987 * SR-IOV management functions.
988 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
989 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
990 * u8 qos, __be16 proto);
991 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
993 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
994 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
995 * int (*ndo_get_vf_config)(struct net_device *dev,
996 * int vf, struct ifla_vf_info *ivf);
997 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
998 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
999 * struct nlattr *port[]);
1001 * Enable or disable the VF ability to query its RSS Redirection Table and
1002 * Hash Key. This is needed since on some devices VF share this information
1003 * with PF and querying it may introduce a theoretical security risk.
1004 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1005 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1006 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1008 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1009 * This is always called from the stack with the rtnl lock held and netif
1010 * tx queues stopped. This allows the netdevice to perform queue
1011 * management safely.
1013 * Fiber Channel over Ethernet (FCoE) offload functions.
1014 * int (*ndo_fcoe_enable)(struct net_device *dev);
1015 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1016 * so the underlying device can perform whatever needed configuration or
1017 * initialization to support acceleration of FCoE traffic.
1019 * int (*ndo_fcoe_disable)(struct net_device *dev);
1020 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1021 * so the underlying device can perform whatever needed clean-ups to
1022 * stop supporting acceleration of FCoE traffic.
1024 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1025 * struct scatterlist *sgl, unsigned int sgc);
1026 * Called when the FCoE Initiator wants to initialize an I/O that
1027 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1028 * perform necessary setup and returns 1 to indicate the device is set up
1029 * successfully to perform DDP on this I/O, otherwise this returns 0.
1031 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1032 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1033 * indicated by the FC exchange id 'xid', so the underlying device can
1034 * clean up and reuse resources for later DDP requests.
1036 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1037 * struct scatterlist *sgl, unsigned int sgc);
1038 * Called when the FCoE Target wants to initialize an I/O that
1039 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1040 * perform necessary setup and returns 1 to indicate the device is set up
1041 * successfully to perform DDP on this I/O, otherwise this returns 0.
1043 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1044 * struct netdev_fcoe_hbainfo *hbainfo);
1045 * Called when the FCoE Protocol stack wants information on the underlying
1046 * device. This information is utilized by the FCoE protocol stack to
1047 * register attributes with Fiber Channel management service as per the
1048 * FC-GS Fabric Device Management Information(FDMI) specification.
1050 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1051 * Called when the underlying device wants to override default World Wide
1052 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1053 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1054 * protocol stack to use.
1057 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1058 * u16 rxq_index, u32 flow_id);
1059 * Set hardware filter for RFS. rxq_index is the target queue index;
1060 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1061 * Return the filter ID on success, or a negative error code.
1063 * Slave management functions (for bridge, bonding, etc).
1064 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1065 * Called to make another netdev an underling.
1067 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1068 * Called to release previously enslaved netdev.
1070 * Feature/offload setting functions.
1071 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1072 * netdev_features_t features);
1073 * Adjusts the requested feature flags according to device-specific
1074 * constraints, and returns the resulting flags. Must not modify
1077 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1078 * Called to update device configuration to new features. Passed
1079 * feature set might be less than what was returned by ndo_fix_features()).
1080 * Must return >0 or -errno if it changed dev->features itself.
1082 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1083 * struct net_device *dev,
1084 * const unsigned char *addr, u16 vid, u16 flags)
1085 * Adds an FDB entry to dev for addr.
1086 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1087 * struct net_device *dev,
1088 * const unsigned char *addr, u16 vid)
1089 * Deletes the FDB entry from dev coresponding to addr.
1090 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1091 * struct net_device *dev, struct net_device *filter_dev,
1093 * Used to add FDB entries to dump requests. Implementers should add
1094 * entries to skb and update idx with the number of entries.
1096 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1098 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1099 * struct net_device *dev, u32 filter_mask,
1101 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1104 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1105 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1106 * which do not represent real hardware may define this to allow their
1107 * userspace components to manage their virtual carrier state. Devices
1108 * that determine carrier state from physical hardware properties (eg
1109 * network cables) or protocol-dependent mechanisms (eg
1110 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1112 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1113 * struct netdev_phys_item_id *ppid);
1114 * Called to get ID of physical port of this device. If driver does
1115 * not implement this, it is assumed that the hw is not able to have
1116 * multiple net devices on single physical port.
1118 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1119 * struct udp_tunnel_info *ti);
1120 * Called by UDP tunnel to notify a driver about the UDP port and socket
1121 * address family that a UDP tunnel is listnening to. It is called only
1122 * when a new port starts listening. The operation is protected by the
1125 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1126 * struct udp_tunnel_info *ti);
1127 * Called by UDP tunnel to notify the driver about a UDP port and socket
1128 * address family that the UDP tunnel is not listening to anymore. The
1129 * operation is protected by the RTNL.
1131 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1132 * struct net_device *dev)
1133 * Called by upper layer devices to accelerate switching or other
1134 * station functionality into hardware. 'pdev is the lowerdev
1135 * to use for the offload and 'dev' is the net device that will
1136 * back the offload. Returns a pointer to the private structure
1137 * the upper layer will maintain.
1138 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1139 * Called by upper layer device to delete the station created
1140 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1141 * the station and priv is the structure returned by the add
1143 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1144 * int queue_index, u32 maxrate);
1145 * Called when a user wants to set a max-rate limitation of specific
1147 * int (*ndo_get_iflink)(const struct net_device *dev);
1148 * Called to get the iflink value of this device.
1149 * void (*ndo_change_proto_down)(struct net_device *dev,
1151 * This function is used to pass protocol port error state information
1152 * to the switch driver. The switch driver can react to the proto_down
1153 * by doing a phys down on the associated switch port.
1154 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1155 * This function is used to get egress tunnel information for given skb.
1156 * This is useful for retrieving outer tunnel header parameters while
1158 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1159 * This function is used to specify the headroom that the skb must
1160 * consider when allocation skb during packet reception. Setting
1161 * appropriate rx headroom value allows avoiding skb head copy on
1162 * forward. Setting a negative value resets the rx headroom to the
1164 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1165 * This function is used to set or query state related to XDP on the
1166 * netdevice and manage BPF offload. See definition of
1167 * enum bpf_netdev_command for details.
1168 * int (*ndo_xdp_xmit)(struct net_device *dev, struct xdp_buff *xdp);
1169 * This function is used to submit a XDP packet for transmit on a
1171 * void (*ndo_xdp_flush)(struct net_device *dev);
1172 * This function is used to inform the driver to flush a particular
1173 * xdp tx queue. Must be called on same CPU as xdp_xmit.
1175 struct net_device_ops {
1176 int (*ndo_init)(struct net_device *dev);
1177 void (*ndo_uninit)(struct net_device *dev);
1178 int (*ndo_open)(struct net_device *dev);
1179 int (*ndo_stop)(struct net_device *dev);
1180 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1181 struct net_device *dev);
1182 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1183 struct net_device *dev,
1184 netdev_features_t features);
1185 u16 (*ndo_select_queue)(struct net_device *dev,
1186 struct sk_buff *skb,
1188 select_queue_fallback_t fallback);
1189 void (*ndo_change_rx_flags)(struct net_device *dev,
1191 void (*ndo_set_rx_mode)(struct net_device *dev);
1192 int (*ndo_set_mac_address)(struct net_device *dev,
1194 int (*ndo_validate_addr)(struct net_device *dev);
1195 int (*ndo_do_ioctl)(struct net_device *dev,
1196 struct ifreq *ifr, int cmd);
1197 int (*ndo_set_config)(struct net_device *dev,
1199 int (*ndo_change_mtu)(struct net_device *dev,
1201 int (*ndo_neigh_setup)(struct net_device *dev,
1202 struct neigh_parms *);
1203 void (*ndo_tx_timeout) (struct net_device *dev);
1205 void (*ndo_get_stats64)(struct net_device *dev,
1206 struct rtnl_link_stats64 *storage);
1207 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1208 int (*ndo_get_offload_stats)(int attr_id,
1209 const struct net_device *dev,
1211 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1213 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1214 __be16 proto, u16 vid);
1215 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1216 __be16 proto, u16 vid);
1217 #ifdef CONFIG_NET_POLL_CONTROLLER
1218 void (*ndo_poll_controller)(struct net_device *dev);
1219 int (*ndo_netpoll_setup)(struct net_device *dev,
1220 struct netpoll_info *info);
1221 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1223 int (*ndo_set_vf_mac)(struct net_device *dev,
1224 int queue, u8 *mac);
1225 int (*ndo_set_vf_vlan)(struct net_device *dev,
1226 int queue, u16 vlan,
1227 u8 qos, __be16 proto);
1228 int (*ndo_set_vf_rate)(struct net_device *dev,
1229 int vf, int min_tx_rate,
1231 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1232 int vf, bool setting);
1233 int (*ndo_set_vf_trust)(struct net_device *dev,
1234 int vf, bool setting);
1235 int (*ndo_get_vf_config)(struct net_device *dev,
1237 struct ifla_vf_info *ivf);
1238 int (*ndo_set_vf_link_state)(struct net_device *dev,
1239 int vf, int link_state);
1240 int (*ndo_get_vf_stats)(struct net_device *dev,
1242 struct ifla_vf_stats
1244 int (*ndo_set_vf_port)(struct net_device *dev,
1246 struct nlattr *port[]);
1247 int (*ndo_get_vf_port)(struct net_device *dev,
1248 int vf, struct sk_buff *skb);
1249 int (*ndo_set_vf_guid)(struct net_device *dev,
1252 int (*ndo_set_vf_rss_query_en)(
1253 struct net_device *dev,
1254 int vf, bool setting);
1255 int (*ndo_setup_tc)(struct net_device *dev,
1256 enum tc_setup_type type,
1258 #if IS_ENABLED(CONFIG_FCOE)
1259 int (*ndo_fcoe_enable)(struct net_device *dev);
1260 int (*ndo_fcoe_disable)(struct net_device *dev);
1261 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1263 struct scatterlist *sgl,
1265 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1267 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1269 struct scatterlist *sgl,
1271 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1272 struct netdev_fcoe_hbainfo *hbainfo);
1275 #if IS_ENABLED(CONFIG_LIBFCOE)
1276 #define NETDEV_FCOE_WWNN 0
1277 #define NETDEV_FCOE_WWPN 1
1278 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1279 u64 *wwn, int type);
1282 #ifdef CONFIG_RFS_ACCEL
1283 int (*ndo_rx_flow_steer)(struct net_device *dev,
1284 const struct sk_buff *skb,
1288 int (*ndo_add_slave)(struct net_device *dev,
1289 struct net_device *slave_dev,
1290 struct netlink_ext_ack *extack);
1291 int (*ndo_del_slave)(struct net_device *dev,
1292 struct net_device *slave_dev);
1293 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1294 netdev_features_t features);
1295 int (*ndo_set_features)(struct net_device *dev,
1296 netdev_features_t features);
1297 int (*ndo_neigh_construct)(struct net_device *dev,
1298 struct neighbour *n);
1299 void (*ndo_neigh_destroy)(struct net_device *dev,
1300 struct neighbour *n);
1302 int (*ndo_fdb_add)(struct ndmsg *ndm,
1303 struct nlattr *tb[],
1304 struct net_device *dev,
1305 const unsigned char *addr,
1308 int (*ndo_fdb_del)(struct ndmsg *ndm,
1309 struct nlattr *tb[],
1310 struct net_device *dev,
1311 const unsigned char *addr,
1313 int (*ndo_fdb_dump)(struct sk_buff *skb,
1314 struct netlink_callback *cb,
1315 struct net_device *dev,
1316 struct net_device *filter_dev,
1319 int (*ndo_bridge_setlink)(struct net_device *dev,
1320 struct nlmsghdr *nlh,
1322 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1324 struct net_device *dev,
1327 int (*ndo_bridge_dellink)(struct net_device *dev,
1328 struct nlmsghdr *nlh,
1330 int (*ndo_change_carrier)(struct net_device *dev,
1332 int (*ndo_get_phys_port_id)(struct net_device *dev,
1333 struct netdev_phys_item_id *ppid);
1334 int (*ndo_get_phys_port_name)(struct net_device *dev,
1335 char *name, size_t len);
1336 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1337 struct udp_tunnel_info *ti);
1338 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1339 struct udp_tunnel_info *ti);
1340 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1341 struct net_device *dev);
1342 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1345 int (*ndo_get_lock_subclass)(struct net_device *dev);
1346 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1349 int (*ndo_get_iflink)(const struct net_device *dev);
1350 int (*ndo_change_proto_down)(struct net_device *dev,
1352 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1353 struct sk_buff *skb);
1354 void (*ndo_set_rx_headroom)(struct net_device *dev,
1355 int needed_headroom);
1356 int (*ndo_bpf)(struct net_device *dev,
1357 struct netdev_bpf *bpf);
1358 int (*ndo_xdp_xmit)(struct net_device *dev,
1359 struct xdp_buff *xdp);
1360 void (*ndo_xdp_flush)(struct net_device *dev);
1364 * enum net_device_priv_flags - &struct net_device priv_flags
1366 * These are the &struct net_device, they are only set internally
1367 * by drivers and used in the kernel. These flags are invisible to
1368 * userspace; this means that the order of these flags can change
1369 * during any kernel release.
1371 * You should have a pretty good reason to be extending these flags.
1373 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1374 * @IFF_EBRIDGE: Ethernet bridging device
1375 * @IFF_BONDING: bonding master or slave
1376 * @IFF_ISATAP: ISATAP interface (RFC4214)
1377 * @IFF_WAN_HDLC: WAN HDLC device
1378 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1380 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1381 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1382 * @IFF_MACVLAN_PORT: device used as macvlan port
1383 * @IFF_BRIDGE_PORT: device used as bridge port
1384 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1385 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1386 * @IFF_UNICAST_FLT: Supports unicast filtering
1387 * @IFF_TEAM_PORT: device used as team port
1388 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1389 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1390 * change when it's running
1391 * @IFF_MACVLAN: Macvlan device
1392 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1393 * underlying stacked devices
1394 * @IFF_L3MDEV_MASTER: device is an L3 master device
1395 * @IFF_NO_QUEUE: device can run without qdisc attached
1396 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1397 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1398 * @IFF_TEAM: device is a team device
1399 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1400 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1401 * entity (i.e. the master device for bridged veth)
1402 * @IFF_MACSEC: device is a MACsec device
1403 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1405 enum netdev_priv_flags {
1406 IFF_802_1Q_VLAN = 1<<0,
1410 IFF_WAN_HDLC = 1<<4,
1411 IFF_XMIT_DST_RELEASE = 1<<5,
1412 IFF_DONT_BRIDGE = 1<<6,
1413 IFF_DISABLE_NETPOLL = 1<<7,
1414 IFF_MACVLAN_PORT = 1<<8,
1415 IFF_BRIDGE_PORT = 1<<9,
1416 IFF_OVS_DATAPATH = 1<<10,
1417 IFF_TX_SKB_SHARING = 1<<11,
1418 IFF_UNICAST_FLT = 1<<12,
1419 IFF_TEAM_PORT = 1<<13,
1420 IFF_SUPP_NOFCS = 1<<14,
1421 IFF_LIVE_ADDR_CHANGE = 1<<15,
1422 IFF_MACVLAN = 1<<16,
1423 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1424 IFF_L3MDEV_MASTER = 1<<18,
1425 IFF_NO_QUEUE = 1<<19,
1426 IFF_OPENVSWITCH = 1<<20,
1427 IFF_L3MDEV_SLAVE = 1<<21,
1429 IFF_RXFH_CONFIGURED = 1<<23,
1430 IFF_PHONY_HEADROOM = 1<<24,
1432 IFF_NO_RX_HANDLER = 1<<26,
1435 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1436 #define IFF_EBRIDGE IFF_EBRIDGE
1437 #define IFF_BONDING IFF_BONDING
1438 #define IFF_ISATAP IFF_ISATAP
1439 #define IFF_WAN_HDLC IFF_WAN_HDLC
1440 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1441 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1442 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1443 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1444 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1445 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1446 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1447 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1448 #define IFF_TEAM_PORT IFF_TEAM_PORT
1449 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1450 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1451 #define IFF_MACVLAN IFF_MACVLAN
1452 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1453 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1454 #define IFF_NO_QUEUE IFF_NO_QUEUE
1455 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1456 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1457 #define IFF_TEAM IFF_TEAM
1458 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1459 #define IFF_MACSEC IFF_MACSEC
1460 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1463 * struct net_device - The DEVICE structure.
1465 * Actually, this whole structure is a big mistake. It mixes I/O
1466 * data with strictly "high-level" data, and it has to know about
1467 * almost every data structure used in the INET module.
1469 * @name: This is the first field of the "visible" part of this structure
1470 * (i.e. as seen by users in the "Space.c" file). It is the name
1473 * @name_hlist: Device name hash chain, please keep it close to name[]
1474 * @ifalias: SNMP alias
1475 * @mem_end: Shared memory end
1476 * @mem_start: Shared memory start
1477 * @base_addr: Device I/O address
1478 * @irq: Device IRQ number
1480 * @state: Generic network queuing layer state, see netdev_state_t
1481 * @dev_list: The global list of network devices
1482 * @napi_list: List entry used for polling NAPI devices
1483 * @unreg_list: List entry when we are unregistering the
1484 * device; see the function unregister_netdev
1485 * @close_list: List entry used when we are closing the device
1486 * @ptype_all: Device-specific packet handlers for all protocols
1487 * @ptype_specific: Device-specific, protocol-specific packet handlers
1489 * @adj_list: Directly linked devices, like slaves for bonding
1490 * @features: Currently active device features
1491 * @hw_features: User-changeable features
1493 * @wanted_features: User-requested features
1494 * @vlan_features: Mask of features inheritable by VLAN devices
1496 * @hw_enc_features: Mask of features inherited by encapsulating devices
1497 * This field indicates what encapsulation
1498 * offloads the hardware is capable of doing,
1499 * and drivers will need to set them appropriately.
1501 * @mpls_features: Mask of features inheritable by MPLS
1503 * @ifindex: interface index
1504 * @group: The group the device belongs to
1506 * @stats: Statistics struct, which was left as a legacy, use
1507 * rtnl_link_stats64 instead
1509 * @rx_dropped: Dropped packets by core network,
1510 * do not use this in drivers
1511 * @tx_dropped: Dropped packets by core network,
1512 * do not use this in drivers
1513 * @rx_nohandler: nohandler dropped packets by core network on
1514 * inactive devices, do not use this in drivers
1515 * @carrier_up_count: Number of times the carrier has been up
1516 * @carrier_down_count: Number of times the carrier has been down
1518 * @wireless_handlers: List of functions to handle Wireless Extensions,
1520 * see <net/iw_handler.h> for details.
1521 * @wireless_data: Instance data managed by the core of wireless extensions
1523 * @netdev_ops: Includes several pointers to callbacks,
1524 * if one wants to override the ndo_*() functions
1525 * @ethtool_ops: Management operations
1526 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1527 * discovery handling. Necessary for e.g. 6LoWPAN.
1528 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1529 * of Layer 2 headers.
1531 * @flags: Interface flags (a la BSD)
1532 * @priv_flags: Like 'flags' but invisible to userspace,
1533 * see if.h for the definitions
1534 * @gflags: Global flags ( kept as legacy )
1535 * @padded: How much padding added by alloc_netdev()
1536 * @operstate: RFC2863 operstate
1537 * @link_mode: Mapping policy to operstate
1538 * @if_port: Selectable AUI, TP, ...
1540 * @mtu: Interface MTU value
1541 * @min_mtu: Interface Minimum MTU value
1542 * @max_mtu: Interface Maximum MTU value
1543 * @type: Interface hardware type
1544 * @hard_header_len: Maximum hardware header length.
1545 * @min_header_len: Minimum hardware header length
1547 * @needed_headroom: Extra headroom the hardware may need, but not in all
1548 * cases can this be guaranteed
1549 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1550 * cases can this be guaranteed. Some cases also use
1551 * LL_MAX_HEADER instead to allocate the skb
1553 * interface address info:
1555 * @perm_addr: Permanent hw address
1556 * @addr_assign_type: Hw address assignment type
1557 * @addr_len: Hardware address length
1558 * @neigh_priv_len: Used in neigh_alloc()
1559 * @dev_id: Used to differentiate devices that share
1560 * the same link layer address
1561 * @dev_port: Used to differentiate devices that share
1563 * @addr_list_lock: XXX: need comments on this one
1564 * @uc_promisc: Counter that indicates promiscuous mode
1565 * has been enabled due to the need to listen to
1566 * additional unicast addresses in a device that
1567 * does not implement ndo_set_rx_mode()
1568 * @uc: unicast mac addresses
1569 * @mc: multicast mac addresses
1570 * @dev_addrs: list of device hw addresses
1571 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1572 * @promiscuity: Number of times the NIC is told to work in
1573 * promiscuous mode; if it becomes 0 the NIC will
1574 * exit promiscuous mode
1575 * @allmulti: Counter, enables or disables allmulticast mode
1577 * @vlan_info: VLAN info
1578 * @dsa_ptr: dsa specific data
1579 * @tipc_ptr: TIPC specific data
1580 * @atalk_ptr: AppleTalk link
1581 * @ip_ptr: IPv4 specific data
1582 * @dn_ptr: DECnet specific data
1583 * @ip6_ptr: IPv6 specific data
1584 * @ax25_ptr: AX.25 specific data
1585 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1587 * @dev_addr: Hw address (before bcast,
1588 * because most packets are unicast)
1590 * @_rx: Array of RX queues
1591 * @num_rx_queues: Number of RX queues
1592 * allocated at register_netdev() time
1593 * @real_num_rx_queues: Number of RX queues currently active in device
1595 * @rx_handler: handler for received packets
1596 * @rx_handler_data: XXX: need comments on this one
1597 * @miniq_ingress: ingress/clsact qdisc specific data for
1598 * ingress processing
1599 * @ingress_queue: XXX: need comments on this one
1600 * @broadcast: hw bcast address
1602 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1603 * indexed by RX queue number. Assigned by driver.
1604 * This must only be set if the ndo_rx_flow_steer
1605 * operation is defined
1606 * @index_hlist: Device index hash chain
1608 * @_tx: Array of TX queues
1609 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1610 * @real_num_tx_queues: Number of TX queues currently active in device
1611 * @qdisc: Root qdisc from userspace point of view
1612 * @tx_queue_len: Max frames per queue allowed
1613 * @tx_global_lock: XXX: need comments on this one
1615 * @xps_maps: XXX: need comments on this one
1616 * @miniq_egress: clsact qdisc specific data for
1618 * @watchdog_timeo: Represents the timeout that is used by
1619 * the watchdog (see dev_watchdog())
1620 * @watchdog_timer: List of timers
1622 * @pcpu_refcnt: Number of references to this device
1623 * @todo_list: Delayed register/unregister
1624 * @link_watch_list: XXX: need comments on this one
1626 * @reg_state: Register/unregister state machine
1627 * @dismantle: Device is going to be freed
1628 * @rtnl_link_state: This enum represents the phases of creating
1631 * @needs_free_netdev: Should unregister perform free_netdev?
1632 * @priv_destructor: Called from unregister
1633 * @npinfo: XXX: need comments on this one
1634 * @nd_net: Network namespace this network device is inside
1636 * @ml_priv: Mid-layer private
1637 * @lstats: Loopback statistics
1638 * @tstats: Tunnel statistics
1639 * @dstats: Dummy statistics
1640 * @vstats: Virtual ethernet statistics
1645 * @dev: Class/net/name entry
1646 * @sysfs_groups: Space for optional device, statistics and wireless
1649 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1650 * @rtnl_link_ops: Rtnl_link_ops
1652 * @gso_max_size: Maximum size of generic segmentation offload
1653 * @gso_max_segs: Maximum number of segments that can be passed to the
1656 * @dcbnl_ops: Data Center Bridging netlink ops
1657 * @num_tc: Number of traffic classes in the net device
1658 * @tc_to_txq: XXX: need comments on this one
1659 * @prio_tc_map: XXX: need comments on this one
1661 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1663 * @priomap: XXX: need comments on this one
1664 * @phydev: Physical device may attach itself
1665 * for hardware timestamping
1666 * @sfp_bus: attached &struct sfp_bus structure.
1668 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1669 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1671 * @proto_down: protocol port state information can be sent to the
1672 * switch driver and used to set the phys state of the
1675 * FIXME: cleanup struct net_device such that network protocol info
1680 char name[IFNAMSIZ];
1681 struct hlist_node name_hlist;
1682 struct dev_ifalias __rcu *ifalias;
1684 * I/O specific fields
1685 * FIXME: Merge these and struct ifmap into one
1687 unsigned long mem_end;
1688 unsigned long mem_start;
1689 unsigned long base_addr;
1693 * Some hardware also needs these fields (state,dev_list,
1694 * napi_list,unreg_list,close_list) but they are not
1695 * part of the usual set specified in Space.c.
1698 unsigned long state;
1700 struct list_head dev_list;
1701 struct list_head napi_list;
1702 struct list_head unreg_list;
1703 struct list_head close_list;
1704 struct list_head ptype_all;
1705 struct list_head ptype_specific;
1708 struct list_head upper;
1709 struct list_head lower;
1712 netdev_features_t features;
1713 netdev_features_t hw_features;
1714 netdev_features_t wanted_features;
1715 netdev_features_t vlan_features;
1716 netdev_features_t hw_enc_features;
1717 netdev_features_t mpls_features;
1718 netdev_features_t gso_partial_features;
1723 struct net_device_stats stats;
1725 atomic_long_t rx_dropped;
1726 atomic_long_t tx_dropped;
1727 atomic_long_t rx_nohandler;
1729 /* Stats to monitor link on/off, flapping */
1730 atomic_t carrier_up_count;
1731 atomic_t carrier_down_count;
1733 #ifdef CONFIG_WIRELESS_EXT
1734 const struct iw_handler_def *wireless_handlers;
1735 struct iw_public_data *wireless_data;
1737 const struct net_device_ops *netdev_ops;
1738 const struct ethtool_ops *ethtool_ops;
1739 #ifdef CONFIG_NET_SWITCHDEV
1740 const struct switchdev_ops *switchdev_ops;
1742 #ifdef CONFIG_NET_L3_MASTER_DEV
1743 const struct l3mdev_ops *l3mdev_ops;
1745 #if IS_ENABLED(CONFIG_IPV6)
1746 const struct ndisc_ops *ndisc_ops;
1749 #ifdef CONFIG_XFRM_OFFLOAD
1750 const struct xfrmdev_ops *xfrmdev_ops;
1753 const struct header_ops *header_ops;
1756 unsigned int priv_flags;
1758 unsigned short gflags;
1759 unsigned short padded;
1761 unsigned char operstate;
1762 unsigned char link_mode;
1764 unsigned char if_port;
1768 unsigned int min_mtu;
1769 unsigned int max_mtu;
1770 unsigned short type;
1771 unsigned short hard_header_len;
1772 unsigned char min_header_len;
1774 unsigned short needed_headroom;
1775 unsigned short needed_tailroom;
1777 /* Interface address info. */
1778 unsigned char perm_addr[MAX_ADDR_LEN];
1779 unsigned char addr_assign_type;
1780 unsigned char addr_len;
1781 unsigned short neigh_priv_len;
1782 unsigned short dev_id;
1783 unsigned short dev_port;
1784 spinlock_t addr_list_lock;
1785 unsigned char name_assign_type;
1787 struct netdev_hw_addr_list uc;
1788 struct netdev_hw_addr_list mc;
1789 struct netdev_hw_addr_list dev_addrs;
1792 struct kset *queues_kset;
1794 unsigned int promiscuity;
1795 unsigned int allmulti;
1798 /* Protocol-specific pointers */
1800 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1801 struct vlan_info __rcu *vlan_info;
1803 #if IS_ENABLED(CONFIG_NET_DSA)
1804 struct dsa_port *dsa_ptr;
1806 #if IS_ENABLED(CONFIG_TIPC)
1807 struct tipc_bearer __rcu *tipc_ptr;
1809 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1812 struct in_device __rcu *ip_ptr;
1813 #if IS_ENABLED(CONFIG_DECNET)
1814 struct dn_dev __rcu *dn_ptr;
1816 struct inet6_dev __rcu *ip6_ptr;
1817 #if IS_ENABLED(CONFIG_AX25)
1820 struct wireless_dev *ieee80211_ptr;
1821 struct wpan_dev *ieee802154_ptr;
1822 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1823 struct mpls_dev __rcu *mpls_ptr;
1827 * Cache lines mostly used on receive path (including eth_type_trans())
1829 /* Interface address info used in eth_type_trans() */
1830 unsigned char *dev_addr;
1832 struct netdev_rx_queue *_rx;
1833 unsigned int num_rx_queues;
1834 unsigned int real_num_rx_queues;
1836 struct bpf_prog __rcu *xdp_prog;
1837 unsigned long gro_flush_timeout;
1838 rx_handler_func_t __rcu *rx_handler;
1839 void __rcu *rx_handler_data;
1841 #ifdef CONFIG_NET_CLS_ACT
1842 struct mini_Qdisc __rcu *miniq_ingress;
1844 struct netdev_queue __rcu *ingress_queue;
1845 #ifdef CONFIG_NETFILTER_INGRESS
1846 struct nf_hook_entries __rcu *nf_hooks_ingress;
1849 unsigned char broadcast[MAX_ADDR_LEN];
1850 #ifdef CONFIG_RFS_ACCEL
1851 struct cpu_rmap *rx_cpu_rmap;
1853 struct hlist_node index_hlist;
1856 * Cache lines mostly used on transmit path
1858 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1859 unsigned int num_tx_queues;
1860 unsigned int real_num_tx_queues;
1861 struct Qdisc *qdisc;
1862 #ifdef CONFIG_NET_SCHED
1863 DECLARE_HASHTABLE (qdisc_hash, 4);
1865 unsigned int tx_queue_len;
1866 spinlock_t tx_global_lock;
1870 struct xps_dev_maps __rcu *xps_maps;
1872 #ifdef CONFIG_NET_CLS_ACT
1873 struct mini_Qdisc __rcu *miniq_egress;
1876 /* These may be needed for future network-power-down code. */
1877 struct timer_list watchdog_timer;
1879 int __percpu *pcpu_refcnt;
1880 struct list_head todo_list;
1882 struct list_head link_watch_list;
1884 enum { NETREG_UNINITIALIZED=0,
1885 NETREG_REGISTERED, /* completed register_netdevice */
1886 NETREG_UNREGISTERING, /* called unregister_netdevice */
1887 NETREG_UNREGISTERED, /* completed unregister todo */
1888 NETREG_RELEASED, /* called free_netdev */
1889 NETREG_DUMMY, /* dummy device for NAPI poll */
1895 RTNL_LINK_INITIALIZED,
1896 RTNL_LINK_INITIALIZING,
1897 } rtnl_link_state:16;
1899 bool needs_free_netdev;
1900 void (*priv_destructor)(struct net_device *dev);
1902 #ifdef CONFIG_NETPOLL
1903 struct netpoll_info __rcu *npinfo;
1906 possible_net_t nd_net;
1908 /* mid-layer private */
1911 struct pcpu_lstats __percpu *lstats;
1912 struct pcpu_sw_netstats __percpu *tstats;
1913 struct pcpu_dstats __percpu *dstats;
1914 struct pcpu_vstats __percpu *vstats;
1917 #if IS_ENABLED(CONFIG_GARP)
1918 struct garp_port __rcu *garp_port;
1920 #if IS_ENABLED(CONFIG_MRP)
1921 struct mrp_port __rcu *mrp_port;
1925 const struct attribute_group *sysfs_groups[4];
1926 const struct attribute_group *sysfs_rx_queue_group;
1928 const struct rtnl_link_ops *rtnl_link_ops;
1930 /* for setting kernel sock attribute on TCP connection setup */
1931 #define GSO_MAX_SIZE 65536
1932 unsigned int gso_max_size;
1933 #define GSO_MAX_SEGS 65535
1937 const struct dcbnl_rtnl_ops *dcbnl_ops;
1940 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1941 u8 prio_tc_map[TC_BITMASK + 1];
1943 #if IS_ENABLED(CONFIG_FCOE)
1944 unsigned int fcoe_ddp_xid;
1946 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1947 struct netprio_map __rcu *priomap;
1949 struct phy_device *phydev;
1950 struct sfp_bus *sfp_bus;
1951 struct lock_class_key *qdisc_tx_busylock;
1952 struct lock_class_key *qdisc_running_key;
1955 #define to_net_dev(d) container_of(d, struct net_device, dev)
1957 static inline bool netif_elide_gro(const struct net_device *dev)
1959 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
1964 #define NETDEV_ALIGN 32
1967 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1969 return dev->prio_tc_map[prio & TC_BITMASK];
1973 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1975 if (tc >= dev->num_tc)
1978 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1982 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
1983 void netdev_reset_tc(struct net_device *dev);
1984 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
1985 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
1988 int netdev_get_num_tc(struct net_device *dev)
1994 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1997 return &dev->_tx[index];
2000 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2001 const struct sk_buff *skb)
2003 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2006 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2007 void (*f)(struct net_device *,
2008 struct netdev_queue *,
2014 for (i = 0; i < dev->num_tx_queues; i++)
2015 f(dev, &dev->_tx[i], arg);
2018 #define netdev_lockdep_set_classes(dev) \
2020 static struct lock_class_key qdisc_tx_busylock_key; \
2021 static struct lock_class_key qdisc_running_key; \
2022 static struct lock_class_key qdisc_xmit_lock_key; \
2023 static struct lock_class_key dev_addr_list_lock_key; \
2026 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2027 (dev)->qdisc_running_key = &qdisc_running_key; \
2028 lockdep_set_class(&(dev)->addr_list_lock, \
2029 &dev_addr_list_lock_key); \
2030 for (i = 0; i < (dev)->num_tx_queues; i++) \
2031 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2032 &qdisc_xmit_lock_key); \
2035 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
2036 struct sk_buff *skb,
2039 /* returns the headroom that the master device needs to take in account
2040 * when forwarding to this dev
2042 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2044 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2047 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2049 if (dev->netdev_ops->ndo_set_rx_headroom)
2050 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2053 /* set the device rx headroom to the dev's default */
2054 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2056 netdev_set_rx_headroom(dev, -1);
2060 * Net namespace inlines
2063 struct net *dev_net(const struct net_device *dev)
2065 return read_pnet(&dev->nd_net);
2069 void dev_net_set(struct net_device *dev, struct net *net)
2071 write_pnet(&dev->nd_net, net);
2075 * netdev_priv - access network device private data
2076 * @dev: network device
2078 * Get network device private data
2080 static inline void *netdev_priv(const struct net_device *dev)
2082 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2085 /* Set the sysfs physical device reference for the network logical device
2086 * if set prior to registration will cause a symlink during initialization.
2088 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2090 /* Set the sysfs device type for the network logical device to allow
2091 * fine-grained identification of different network device types. For
2092 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2094 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2096 /* Default NAPI poll() weight
2097 * Device drivers are strongly advised to not use bigger value
2099 #define NAPI_POLL_WEIGHT 64
2102 * netif_napi_add - initialize a NAPI context
2103 * @dev: network device
2104 * @napi: NAPI context
2105 * @poll: polling function
2106 * @weight: default weight
2108 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2109 * *any* of the other NAPI-related functions.
2111 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2112 int (*poll)(struct napi_struct *, int), int weight);
2115 * netif_tx_napi_add - initialize a NAPI context
2116 * @dev: network device
2117 * @napi: NAPI context
2118 * @poll: polling function
2119 * @weight: default weight
2121 * This variant of netif_napi_add() should be used from drivers using NAPI
2122 * to exclusively poll a TX queue.
2123 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2125 static inline void netif_tx_napi_add(struct net_device *dev,
2126 struct napi_struct *napi,
2127 int (*poll)(struct napi_struct *, int),
2130 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2131 netif_napi_add(dev, napi, poll, weight);
2135 * netif_napi_del - remove a NAPI context
2136 * @napi: NAPI context
2138 * netif_napi_del() removes a NAPI context from the network device NAPI list
2140 void netif_napi_del(struct napi_struct *napi);
2142 struct napi_gro_cb {
2143 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2146 /* Length of frag0. */
2147 unsigned int frag0_len;
2149 /* This indicates where we are processing relative to skb->data. */
2152 /* This is non-zero if the packet cannot be merged with the new skb. */
2155 /* Save the IP ID here and check when we get to the transport layer */
2158 /* Number of segments aggregated. */
2161 /* Start offset for remote checksum offload */
2162 u16 gro_remcsum_start;
2164 /* jiffies when first packet was created/queued */
2167 /* Used in ipv6_gro_receive() and foo-over-udp */
2170 /* This is non-zero if the packet may be of the same flow. */
2173 /* Used in tunnel GRO receive */
2176 /* GRO checksum is valid */
2179 /* Number of checksums via CHECKSUM_UNNECESSARY */
2184 #define NAPI_GRO_FREE 1
2185 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2187 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2190 /* Used in GRE, set in fou/gue_gro_receive */
2193 /* Used to determine if flush_id can be ignored */
2196 /* Number of gro_receive callbacks this packet already went through */
2197 u8 recursion_counter:4;
2201 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2204 /* used in skb_gro_receive() slow path */
2205 struct sk_buff *last;
2208 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2210 #define GRO_RECURSION_LIMIT 15
2211 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2213 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2216 typedef struct sk_buff **(*gro_receive_t)(struct sk_buff **, struct sk_buff *);
2217 static inline struct sk_buff **call_gro_receive(gro_receive_t cb,
2218 struct sk_buff **head,
2219 struct sk_buff *skb)
2221 if (unlikely(gro_recursion_inc_test(skb))) {
2222 NAPI_GRO_CB(skb)->flush |= 1;
2226 return cb(head, skb);
2229 typedef struct sk_buff **(*gro_receive_sk_t)(struct sock *, struct sk_buff **,
2231 static inline struct sk_buff **call_gro_receive_sk(gro_receive_sk_t cb,
2233 struct sk_buff **head,
2234 struct sk_buff *skb)
2236 if (unlikely(gro_recursion_inc_test(skb))) {
2237 NAPI_GRO_CB(skb)->flush |= 1;
2241 return cb(sk, head, skb);
2244 struct packet_type {
2245 __be16 type; /* This is really htons(ether_type). */
2246 struct net_device *dev; /* NULL is wildcarded here */
2247 int (*func) (struct sk_buff *,
2248 struct net_device *,
2249 struct packet_type *,
2250 struct net_device *);
2251 bool (*id_match)(struct packet_type *ptype,
2253 void *af_packet_priv;
2254 struct list_head list;
2257 struct offload_callbacks {
2258 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2259 netdev_features_t features);
2260 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2261 struct sk_buff *skb);
2262 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2265 struct packet_offload {
2266 __be16 type; /* This is really htons(ether_type). */
2268 struct offload_callbacks callbacks;
2269 struct list_head list;
2272 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2273 struct pcpu_sw_netstats {
2278 struct u64_stats_sync syncp;
2281 #define __netdev_alloc_pcpu_stats(type, gfp) \
2283 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2286 for_each_possible_cpu(__cpu) { \
2287 typeof(type) *stat; \
2288 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2289 u64_stats_init(&stat->syncp); \
2295 #define netdev_alloc_pcpu_stats(type) \
2296 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2298 enum netdev_lag_tx_type {
2299 NETDEV_LAG_TX_TYPE_UNKNOWN,
2300 NETDEV_LAG_TX_TYPE_RANDOM,
2301 NETDEV_LAG_TX_TYPE_BROADCAST,
2302 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2303 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2304 NETDEV_LAG_TX_TYPE_HASH,
2307 struct netdev_lag_upper_info {
2308 enum netdev_lag_tx_type tx_type;
2311 struct netdev_lag_lower_state_info {
2316 #include <linux/notifier.h>
2318 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2319 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2323 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2325 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2326 detected a hardware crash and restarted
2327 - we can use this eg to kick tcp sessions
2329 NETDEV_CHANGE, /* Notify device state change */
2332 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2337 NETDEV_BONDING_FAILOVER,
2339 NETDEV_PRE_TYPE_CHANGE,
2340 NETDEV_POST_TYPE_CHANGE,
2343 NETDEV_NOTIFY_PEERS,
2347 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2348 NETDEV_CHANGEINFODATA,
2349 NETDEV_BONDING_INFO,
2350 NETDEV_PRECHANGEUPPER,
2351 NETDEV_CHANGELOWERSTATE,
2352 NETDEV_UDP_TUNNEL_PUSH_INFO,
2353 NETDEV_UDP_TUNNEL_DROP_INFO,
2354 NETDEV_CHANGE_TX_QUEUE_LEN,
2355 NETDEV_CVLAN_FILTER_PUSH_INFO,
2356 NETDEV_CVLAN_FILTER_DROP_INFO,
2357 NETDEV_SVLAN_FILTER_PUSH_INFO,
2358 NETDEV_SVLAN_FILTER_DROP_INFO,
2360 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2362 int register_netdevice_notifier(struct notifier_block *nb);
2363 int unregister_netdevice_notifier(struct notifier_block *nb);
2365 struct netdev_notifier_info {
2366 struct net_device *dev;
2367 struct netlink_ext_ack *extack;
2370 struct netdev_notifier_change_info {
2371 struct netdev_notifier_info info; /* must be first */
2372 unsigned int flags_changed;
2375 struct netdev_notifier_changeupper_info {
2376 struct netdev_notifier_info info; /* must be first */
2377 struct net_device *upper_dev; /* new upper dev */
2378 bool master; /* is upper dev master */
2379 bool linking; /* is the notification for link or unlink */
2380 void *upper_info; /* upper dev info */
2383 struct netdev_notifier_changelowerstate_info {
2384 struct netdev_notifier_info info; /* must be first */
2385 void *lower_state_info; /* is lower dev state */
2388 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2389 struct net_device *dev)
2392 info->extack = NULL;
2395 static inline struct net_device *
2396 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2401 static inline struct netlink_ext_ack *
2402 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2404 return info->extack;
2407 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2410 extern rwlock_t dev_base_lock; /* Device list lock */
2412 #define for_each_netdev(net, d) \
2413 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2414 #define for_each_netdev_reverse(net, d) \
2415 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2416 #define for_each_netdev_rcu(net, d) \
2417 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2418 #define for_each_netdev_safe(net, d, n) \
2419 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2420 #define for_each_netdev_continue(net, d) \
2421 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2422 #define for_each_netdev_continue_rcu(net, d) \
2423 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2424 #define for_each_netdev_in_bond_rcu(bond, slave) \
2425 for_each_netdev_rcu(&init_net, slave) \
2426 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2427 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2429 static inline struct net_device *next_net_device(struct net_device *dev)
2431 struct list_head *lh;
2435 lh = dev->dev_list.next;
2436 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2439 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2441 struct list_head *lh;
2445 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2446 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2449 static inline struct net_device *first_net_device(struct net *net)
2451 return list_empty(&net->dev_base_head) ? NULL :
2452 net_device_entry(net->dev_base_head.next);
2455 static inline struct net_device *first_net_device_rcu(struct net *net)
2457 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2459 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2462 int netdev_boot_setup_check(struct net_device *dev);
2463 unsigned long netdev_boot_base(const char *prefix, int unit);
2464 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2465 const char *hwaddr);
2466 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2467 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2468 void dev_add_pack(struct packet_type *pt);
2469 void dev_remove_pack(struct packet_type *pt);
2470 void __dev_remove_pack(struct packet_type *pt);
2471 void dev_add_offload(struct packet_offload *po);
2472 void dev_remove_offload(struct packet_offload *po);
2474 int dev_get_iflink(const struct net_device *dev);
2475 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2476 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2477 unsigned short mask);
2478 struct net_device *dev_get_by_name(struct net *net, const char *name);
2479 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2480 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2481 int dev_alloc_name(struct net_device *dev, const char *name);
2482 int dev_open(struct net_device *dev);
2483 void dev_close(struct net_device *dev);
2484 void dev_close_many(struct list_head *head, bool unlink);
2485 void dev_disable_lro(struct net_device *dev);
2486 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2487 int dev_queue_xmit(struct sk_buff *skb);
2488 int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2489 int register_netdevice(struct net_device *dev);
2490 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2491 void unregister_netdevice_many(struct list_head *head);
2492 static inline void unregister_netdevice(struct net_device *dev)
2494 unregister_netdevice_queue(dev, NULL);
2497 int netdev_refcnt_read(const struct net_device *dev);
2498 void free_netdev(struct net_device *dev);
2499 void netdev_freemem(struct net_device *dev);
2500 void synchronize_net(void);
2501 int init_dummy_netdev(struct net_device *dev);
2503 DECLARE_PER_CPU(int, xmit_recursion);
2504 #define XMIT_RECURSION_LIMIT 10
2506 static inline int dev_recursion_level(void)
2508 return this_cpu_read(xmit_recursion);
2511 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2512 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2513 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2514 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2515 int netdev_get_name(struct net *net, char *name, int ifindex);
2516 int dev_restart(struct net_device *dev);
2517 int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2519 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2521 return NAPI_GRO_CB(skb)->data_offset;
2524 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2526 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2529 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2531 NAPI_GRO_CB(skb)->data_offset += len;
2534 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2535 unsigned int offset)
2537 return NAPI_GRO_CB(skb)->frag0 + offset;
2540 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2542 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2545 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2547 NAPI_GRO_CB(skb)->frag0 = NULL;
2548 NAPI_GRO_CB(skb)->frag0_len = 0;
2551 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2552 unsigned int offset)
2554 if (!pskb_may_pull(skb, hlen))
2557 skb_gro_frag0_invalidate(skb);
2558 return skb->data + offset;
2561 static inline void *skb_gro_network_header(struct sk_buff *skb)
2563 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2564 skb_network_offset(skb);
2567 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2568 const void *start, unsigned int len)
2570 if (NAPI_GRO_CB(skb)->csum_valid)
2571 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2572 csum_partial(start, len, 0));
2575 /* GRO checksum functions. These are logical equivalents of the normal
2576 * checksum functions (in skbuff.h) except that they operate on the GRO
2577 * offsets and fields in sk_buff.
2580 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2582 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2584 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2587 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2591 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2592 skb_checksum_start_offset(skb) <
2593 skb_gro_offset(skb)) &&
2594 !skb_at_gro_remcsum_start(skb) &&
2595 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2596 (!zero_okay || check));
2599 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2602 if (NAPI_GRO_CB(skb)->csum_valid &&
2603 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2606 NAPI_GRO_CB(skb)->csum = psum;
2608 return __skb_gro_checksum_complete(skb);
2611 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2613 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2614 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2615 NAPI_GRO_CB(skb)->csum_cnt--;
2617 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2618 * verified a new top level checksum or an encapsulated one
2619 * during GRO. This saves work if we fallback to normal path.
2621 __skb_incr_checksum_unnecessary(skb);
2625 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2628 __sum16 __ret = 0; \
2629 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2630 __ret = __skb_gro_checksum_validate_complete(skb, \
2631 compute_pseudo(skb, proto)); \
2633 skb_gro_incr_csum_unnecessary(skb); \
2637 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2638 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2640 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2642 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2644 #define skb_gro_checksum_simple_validate(skb) \
2645 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2647 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2649 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2650 !NAPI_GRO_CB(skb)->csum_valid);
2653 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2654 __sum16 check, __wsum pseudo)
2656 NAPI_GRO_CB(skb)->csum = ~pseudo;
2657 NAPI_GRO_CB(skb)->csum_valid = 1;
2660 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2662 if (__skb_gro_checksum_convert_check(skb)) \
2663 __skb_gro_checksum_convert(skb, check, \
2664 compute_pseudo(skb, proto)); \
2667 struct gro_remcsum {
2672 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2678 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2679 unsigned int off, size_t hdrlen,
2680 int start, int offset,
2681 struct gro_remcsum *grc,
2685 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2687 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2690 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2694 ptr = skb_gro_header_fast(skb, off);
2695 if (skb_gro_header_hard(skb, off + plen)) {
2696 ptr = skb_gro_header_slow(skb, off + plen, off);
2701 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2704 /* Adjust skb->csum since we changed the packet */
2705 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2707 grc->offset = off + hdrlen + offset;
2713 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2714 struct gro_remcsum *grc)
2717 size_t plen = grc->offset + sizeof(u16);
2722 ptr = skb_gro_header_fast(skb, grc->offset);
2723 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2724 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2729 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2732 #ifdef CONFIG_XFRM_OFFLOAD
2733 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush)
2735 if (PTR_ERR(pp) != -EINPROGRESS)
2736 NAPI_GRO_CB(skb)->flush |= flush;
2739 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush)
2741 NAPI_GRO_CB(skb)->flush |= flush;
2745 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2746 unsigned short type,
2747 const void *daddr, const void *saddr,
2750 if (!dev->header_ops || !dev->header_ops->create)
2753 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2756 static inline int dev_parse_header(const struct sk_buff *skb,
2757 unsigned char *haddr)
2759 const struct net_device *dev = skb->dev;
2761 if (!dev->header_ops || !dev->header_ops->parse)
2763 return dev->header_ops->parse(skb, haddr);
2766 /* ll_header must have at least hard_header_len allocated */
2767 static inline bool dev_validate_header(const struct net_device *dev,
2768 char *ll_header, int len)
2770 if (likely(len >= dev->hard_header_len))
2772 if (len < dev->min_header_len)
2775 if (capable(CAP_SYS_RAWIO)) {
2776 memset(ll_header + len, 0, dev->hard_header_len - len);
2780 if (dev->header_ops && dev->header_ops->validate)
2781 return dev->header_ops->validate(ll_header, len);
2786 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2788 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2789 static inline int unregister_gifconf(unsigned int family)
2791 return register_gifconf(family, NULL);
2794 #ifdef CONFIG_NET_FLOW_LIMIT
2795 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2796 struct sd_flow_limit {
2798 unsigned int num_buckets;
2799 unsigned int history_head;
2800 u16 history[FLOW_LIMIT_HISTORY];
2804 extern int netdev_flow_limit_table_len;
2805 #endif /* CONFIG_NET_FLOW_LIMIT */
2808 * Incoming packets are placed on per-CPU queues
2810 struct softnet_data {
2811 struct list_head poll_list;
2812 struct sk_buff_head process_queue;
2815 unsigned int processed;
2816 unsigned int time_squeeze;
2817 unsigned int received_rps;
2819 struct softnet_data *rps_ipi_list;
2821 #ifdef CONFIG_NET_FLOW_LIMIT
2822 struct sd_flow_limit __rcu *flow_limit;
2824 struct Qdisc *output_queue;
2825 struct Qdisc **output_queue_tailp;
2826 struct sk_buff *completion_queue;
2827 #ifdef CONFIG_XFRM_OFFLOAD
2828 struct sk_buff_head xfrm_backlog;
2831 /* input_queue_head should be written by cpu owning this struct,
2832 * and only read by other cpus. Worth using a cache line.
2834 unsigned int input_queue_head ____cacheline_aligned_in_smp;
2836 /* Elements below can be accessed between CPUs for RPS/RFS */
2837 call_single_data_t csd ____cacheline_aligned_in_smp;
2838 struct softnet_data *rps_ipi_next;
2840 unsigned int input_queue_tail;
2842 unsigned int dropped;
2843 struct sk_buff_head input_pkt_queue;
2844 struct napi_struct backlog;
2848 static inline void input_queue_head_incr(struct softnet_data *sd)
2851 sd->input_queue_head++;
2855 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2856 unsigned int *qtail)
2859 *qtail = ++sd->input_queue_tail;
2863 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2865 void __netif_schedule(struct Qdisc *q);
2866 void netif_schedule_queue(struct netdev_queue *txq);
2868 static inline void netif_tx_schedule_all(struct net_device *dev)
2872 for (i = 0; i < dev->num_tx_queues; i++)
2873 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2876 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2878 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2882 * netif_start_queue - allow transmit
2883 * @dev: network device
2885 * Allow upper layers to call the device hard_start_xmit routine.
2887 static inline void netif_start_queue(struct net_device *dev)
2889 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2892 static inline void netif_tx_start_all_queues(struct net_device *dev)
2896 for (i = 0; i < dev->num_tx_queues; i++) {
2897 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2898 netif_tx_start_queue(txq);
2902 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2905 * netif_wake_queue - restart transmit
2906 * @dev: network device
2908 * Allow upper layers to call the device hard_start_xmit routine.
2909 * Used for flow control when transmit resources are available.
2911 static inline void netif_wake_queue(struct net_device *dev)
2913 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2916 static inline void netif_tx_wake_all_queues(struct net_device *dev)
2920 for (i = 0; i < dev->num_tx_queues; i++) {
2921 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2922 netif_tx_wake_queue(txq);
2926 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2928 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2932 * netif_stop_queue - stop transmitted packets
2933 * @dev: network device
2935 * Stop upper layers calling the device hard_start_xmit routine.
2936 * Used for flow control when transmit resources are unavailable.
2938 static inline void netif_stop_queue(struct net_device *dev)
2940 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2943 void netif_tx_stop_all_queues(struct net_device *dev);
2945 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2947 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2951 * netif_queue_stopped - test if transmit queue is flowblocked
2952 * @dev: network device
2954 * Test if transmit queue on device is currently unable to send.
2956 static inline bool netif_queue_stopped(const struct net_device *dev)
2958 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2961 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2963 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2967 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2969 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2973 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2975 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2979 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2980 * @dev_queue: pointer to transmit queue
2982 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2983 * to give appropriate hint to the CPU.
2985 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2988 prefetchw(&dev_queue->dql.num_queued);
2993 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2994 * @dev_queue: pointer to transmit queue
2996 * BQL enabled drivers might use this helper in their TX completion path,
2997 * to give appropriate hint to the CPU.
2999 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3002 prefetchw(&dev_queue->dql.limit);
3006 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3010 dql_queued(&dev_queue->dql, bytes);
3012 if (likely(dql_avail(&dev_queue->dql) >= 0))
3015 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3018 * The XOFF flag must be set before checking the dql_avail below,
3019 * because in netdev_tx_completed_queue we update the dql_completed
3020 * before checking the XOFF flag.
3024 /* check again in case another CPU has just made room avail */
3025 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3026 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3031 * netdev_sent_queue - report the number of bytes queued to hardware
3032 * @dev: network device
3033 * @bytes: number of bytes queued to the hardware device queue
3035 * Report the number of bytes queued for sending/completion to the network
3036 * device hardware queue. @bytes should be a good approximation and should
3037 * exactly match netdev_completed_queue() @bytes
3039 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3041 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3044 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3045 unsigned int pkts, unsigned int bytes)
3048 if (unlikely(!bytes))
3051 dql_completed(&dev_queue->dql, bytes);
3054 * Without the memory barrier there is a small possiblity that
3055 * netdev_tx_sent_queue will miss the update and cause the queue to
3056 * be stopped forever
3060 if (dql_avail(&dev_queue->dql) < 0)
3063 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3064 netif_schedule_queue(dev_queue);
3069 * netdev_completed_queue - report bytes and packets completed by device
3070 * @dev: network device
3071 * @pkts: actual number of packets sent over the medium
3072 * @bytes: actual number of bytes sent over the medium
3074 * Report the number of bytes and packets transmitted by the network device
3075 * hardware queue over the physical medium, @bytes must exactly match the
3076 * @bytes amount passed to netdev_sent_queue()
3078 static inline void netdev_completed_queue(struct net_device *dev,
3079 unsigned int pkts, unsigned int bytes)
3081 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3084 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3087 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3093 * netdev_reset_queue - reset the packets and bytes count of a network device
3094 * @dev_queue: network device
3096 * Reset the bytes and packet count of a network device and clear the
3097 * software flow control OFF bit for this network device
3099 static inline void netdev_reset_queue(struct net_device *dev_queue)
3101 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3105 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3106 * @dev: network device
3107 * @queue_index: given tx queue index
3109 * Returns 0 if given tx queue index >= number of device tx queues,
3110 * otherwise returns the originally passed tx queue index.
3112 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3114 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3115 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3116 dev->name, queue_index,
3117 dev->real_num_tx_queues);
3125 * netif_running - test if up
3126 * @dev: network device
3128 * Test if the device has been brought up.
3130 static inline bool netif_running(const struct net_device *dev)
3132 return test_bit(__LINK_STATE_START, &dev->state);
3136 * Routines to manage the subqueues on a device. We only need start,
3137 * stop, and a check if it's stopped. All other device management is
3138 * done at the overall netdevice level.
3139 * Also test the device if we're multiqueue.
3143 * netif_start_subqueue - allow sending packets on subqueue
3144 * @dev: network device
3145 * @queue_index: sub queue index
3147 * Start individual transmit queue of a device with multiple transmit queues.
3149 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3151 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3153 netif_tx_start_queue(txq);
3157 * netif_stop_subqueue - stop sending packets on subqueue
3158 * @dev: network device
3159 * @queue_index: sub queue index
3161 * Stop individual transmit queue of a device with multiple transmit queues.
3163 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3165 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3166 netif_tx_stop_queue(txq);
3170 * netif_subqueue_stopped - test status of subqueue
3171 * @dev: network device
3172 * @queue_index: sub queue index
3174 * Check individual transmit queue of a device with multiple transmit queues.
3176 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3179 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3181 return netif_tx_queue_stopped(txq);
3184 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3185 struct sk_buff *skb)
3187 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3191 * netif_wake_subqueue - allow sending packets on subqueue
3192 * @dev: network device
3193 * @queue_index: sub queue index
3195 * Resume individual transmit queue of a device with multiple transmit queues.
3197 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3199 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3201 netif_tx_wake_queue(txq);
3205 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3208 static inline int netif_set_xps_queue(struct net_device *dev,
3209 const struct cpumask *mask,
3216 u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
3217 unsigned int num_tx_queues);
3220 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
3221 * as a distribution range limit for the returned value.
3223 static inline u16 skb_tx_hash(const struct net_device *dev,
3224 struct sk_buff *skb)
3226 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
3230 * netif_is_multiqueue - test if device has multiple transmit queues
3231 * @dev: network device
3233 * Check if device has multiple transmit queues
3235 static inline bool netif_is_multiqueue(const struct net_device *dev)
3237 return dev->num_tx_queues > 1;
3240 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3243 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3245 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3252 static inline struct netdev_rx_queue *
3253 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3255 return dev->_rx + rxq;
3259 static inline unsigned int get_netdev_rx_queue_index(
3260 struct netdev_rx_queue *queue)
3262 struct net_device *dev = queue->dev;
3263 int index = queue - dev->_rx;
3265 BUG_ON(index >= dev->num_rx_queues);
3270 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3271 int netif_get_num_default_rss_queues(void);
3273 enum skb_free_reason {
3274 SKB_REASON_CONSUMED,
3278 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3279 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3282 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3283 * interrupt context or with hardware interrupts being disabled.
3284 * (in_irq() || irqs_disabled())
3286 * We provide four helpers that can be used in following contexts :
3288 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3289 * replacing kfree_skb(skb)
3291 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3292 * Typically used in place of consume_skb(skb) in TX completion path
3294 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3295 * replacing kfree_skb(skb)
3297 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3298 * and consumed a packet. Used in place of consume_skb(skb)
3300 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3302 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3305 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3307 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3310 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3312 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3315 static inline void dev_consume_skb_any(struct sk_buff *skb)
3317 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3320 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3321 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3322 int netif_rx(struct sk_buff *skb);
3323 int netif_rx_ni(struct sk_buff *skb);
3324 int netif_receive_skb(struct sk_buff *skb);
3325 int netif_receive_skb_core(struct sk_buff *skb);
3326 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3327 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3328 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3329 gro_result_t napi_gro_frags(struct napi_struct *napi);
3330 struct packet_offload *gro_find_receive_by_type(__be16 type);
3331 struct packet_offload *gro_find_complete_by_type(__be16 type);
3333 static inline void napi_free_frags(struct napi_struct *napi)
3335 kfree_skb(napi->skb);
3339 bool netdev_is_rx_handler_busy(struct net_device *dev);
3340 int netdev_rx_handler_register(struct net_device *dev,
3341 rx_handler_func_t *rx_handler,
3342 void *rx_handler_data);
3343 void netdev_rx_handler_unregister(struct net_device *dev);
3345 bool dev_valid_name(const char *name);
3346 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3347 bool *need_copyout);
3348 int dev_ifconf(struct net *net, struct ifconf *, int);
3349 int dev_ethtool(struct net *net, struct ifreq *);
3350 unsigned int dev_get_flags(const struct net_device *);
3351 int __dev_change_flags(struct net_device *, unsigned int flags);
3352 int dev_change_flags(struct net_device *, unsigned int);
3353 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3354 unsigned int gchanges);
3355 int dev_change_name(struct net_device *, const char *);
3356 int dev_set_alias(struct net_device *, const char *, size_t);
3357 int dev_get_alias(const struct net_device *, char *, size_t);
3358 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3359 int __dev_set_mtu(struct net_device *, int);
3360 int dev_set_mtu(struct net_device *, int);
3361 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3362 void dev_set_group(struct net_device *, int);
3363 int dev_set_mac_address(struct net_device *, struct sockaddr *);
3364 int dev_change_carrier(struct net_device *, bool new_carrier);
3365 int dev_get_phys_port_id(struct net_device *dev,
3366 struct netdev_phys_item_id *ppid);
3367 int dev_get_phys_port_name(struct net_device *dev,
3368 char *name, size_t len);
3369 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3370 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3371 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3372 struct netdev_queue *txq, int *ret);
3374 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3375 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3377 void __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3378 struct netdev_bpf *xdp);
3380 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3381 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3382 bool is_skb_forwardable(const struct net_device *dev,
3383 const struct sk_buff *skb);
3385 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3386 struct sk_buff *skb)
3388 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3389 unlikely(!is_skb_forwardable(dev, skb))) {
3390 atomic_long_inc(&dev->rx_dropped);
3395 skb_scrub_packet(skb, true);
3400 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3402 extern int netdev_budget;
3403 extern unsigned int netdev_budget_usecs;
3405 /* Called by rtnetlink.c:rtnl_unlock() */
3406 void netdev_run_todo(void);
3409 * dev_put - release reference to device
3410 * @dev: network device
3412 * Release reference to device to allow it to be freed.
3414 static inline void dev_put(struct net_device *dev)
3416 this_cpu_dec(*dev->pcpu_refcnt);
3420 * dev_hold - get reference to device
3421 * @dev: network device
3423 * Hold reference to device to keep it from being freed.
3425 static inline void dev_hold(struct net_device *dev)
3427 this_cpu_inc(*dev->pcpu_refcnt);
3430 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3431 * and _off may be called from IRQ context, but it is caller
3432 * who is responsible for serialization of these calls.
3434 * The name carrier is inappropriate, these functions should really be
3435 * called netif_lowerlayer_*() because they represent the state of any
3436 * kind of lower layer not just hardware media.
3439 void linkwatch_init_dev(struct net_device *dev);
3440 void linkwatch_fire_event(struct net_device *dev);
3441 void linkwatch_forget_dev(struct net_device *dev);
3444 * netif_carrier_ok - test if carrier present
3445 * @dev: network device
3447 * Check if carrier is present on device
3449 static inline bool netif_carrier_ok(const struct net_device *dev)
3451 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3454 unsigned long dev_trans_start(struct net_device *dev);
3456 void __netdev_watchdog_up(struct net_device *dev);
3458 void netif_carrier_on(struct net_device *dev);
3460 void netif_carrier_off(struct net_device *dev);
3463 * netif_dormant_on - mark device as dormant.
3464 * @dev: network device
3466 * Mark device as dormant (as per RFC2863).
3468 * The dormant state indicates that the relevant interface is not
3469 * actually in a condition to pass packets (i.e., it is not 'up') but is
3470 * in a "pending" state, waiting for some external event. For "on-
3471 * demand" interfaces, this new state identifies the situation where the
3472 * interface is waiting for events to place it in the up state.
3474 static inline void netif_dormant_on(struct net_device *dev)
3476 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3477 linkwatch_fire_event(dev);
3481 * netif_dormant_off - set device as not dormant.
3482 * @dev: network device
3484 * Device is not in dormant state.
3486 static inline void netif_dormant_off(struct net_device *dev)
3488 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3489 linkwatch_fire_event(dev);
3493 * netif_dormant - test if device is dormant
3494 * @dev: network device
3496 * Check if device is dormant.
3498 static inline bool netif_dormant(const struct net_device *dev)
3500 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3505 * netif_oper_up - test if device is operational
3506 * @dev: network device
3508 * Check if carrier is operational
3510 static inline bool netif_oper_up(const struct net_device *dev)
3512 return (dev->operstate == IF_OPER_UP ||
3513 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3517 * netif_device_present - is device available or removed
3518 * @dev: network device
3520 * Check if device has not been removed from system.
3522 static inline bool netif_device_present(struct net_device *dev)
3524 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3527 void netif_device_detach(struct net_device *dev);
3529 void netif_device_attach(struct net_device *dev);
3532 * Network interface message level settings
3536 NETIF_MSG_DRV = 0x0001,
3537 NETIF_MSG_PROBE = 0x0002,
3538 NETIF_MSG_LINK = 0x0004,
3539 NETIF_MSG_TIMER = 0x0008,
3540 NETIF_MSG_IFDOWN = 0x0010,
3541 NETIF_MSG_IFUP = 0x0020,
3542 NETIF_MSG_RX_ERR = 0x0040,
3543 NETIF_MSG_TX_ERR = 0x0080,
3544 NETIF_MSG_TX_QUEUED = 0x0100,
3545 NETIF_MSG_INTR = 0x0200,
3546 NETIF_MSG_TX_DONE = 0x0400,
3547 NETIF_MSG_RX_STATUS = 0x0800,
3548 NETIF_MSG_PKTDATA = 0x1000,
3549 NETIF_MSG_HW = 0x2000,
3550 NETIF_MSG_WOL = 0x4000,
3553 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3554 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3555 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3556 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3557 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3558 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3559 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3560 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3561 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3562 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3563 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3564 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3565 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3566 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3567 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3569 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3572 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3573 return default_msg_enable_bits;
3574 if (debug_value == 0) /* no output */
3576 /* set low N bits */
3577 return (1 << debug_value) - 1;
3580 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3582 spin_lock(&txq->_xmit_lock);
3583 txq->xmit_lock_owner = cpu;
3586 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3588 __acquire(&txq->_xmit_lock);
3592 static inline void __netif_tx_release(struct netdev_queue *txq)
3594 __release(&txq->_xmit_lock);
3597 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3599 spin_lock_bh(&txq->_xmit_lock);
3600 txq->xmit_lock_owner = smp_processor_id();
3603 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3605 bool ok = spin_trylock(&txq->_xmit_lock);
3607 txq->xmit_lock_owner = smp_processor_id();
3611 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3613 txq->xmit_lock_owner = -1;
3614 spin_unlock(&txq->_xmit_lock);
3617 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3619 txq->xmit_lock_owner = -1;
3620 spin_unlock_bh(&txq->_xmit_lock);
3623 static inline void txq_trans_update(struct netdev_queue *txq)
3625 if (txq->xmit_lock_owner != -1)
3626 txq->trans_start = jiffies;
3629 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3630 static inline void netif_trans_update(struct net_device *dev)
3632 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3634 if (txq->trans_start != jiffies)
3635 txq->trans_start = jiffies;
3639 * netif_tx_lock - grab network device transmit lock
3640 * @dev: network device
3642 * Get network device transmit lock
3644 static inline void netif_tx_lock(struct net_device *dev)
3649 spin_lock(&dev->tx_global_lock);
3650 cpu = smp_processor_id();
3651 for (i = 0; i < dev->num_tx_queues; i++) {
3652 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3654 /* We are the only thread of execution doing a
3655 * freeze, but we have to grab the _xmit_lock in
3656 * order to synchronize with threads which are in
3657 * the ->hard_start_xmit() handler and already
3658 * checked the frozen bit.
3660 __netif_tx_lock(txq, cpu);
3661 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3662 __netif_tx_unlock(txq);
3666 static inline void netif_tx_lock_bh(struct net_device *dev)
3672 static inline void netif_tx_unlock(struct net_device *dev)
3676 for (i = 0; i < dev->num_tx_queues; i++) {
3677 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3679 /* No need to grab the _xmit_lock here. If the
3680 * queue is not stopped for another reason, we
3683 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3684 netif_schedule_queue(txq);
3686 spin_unlock(&dev->tx_global_lock);
3689 static inline void netif_tx_unlock_bh(struct net_device *dev)
3691 netif_tx_unlock(dev);
3695 #define HARD_TX_LOCK(dev, txq, cpu) { \
3696 if ((dev->features & NETIF_F_LLTX) == 0) { \
3697 __netif_tx_lock(txq, cpu); \
3699 __netif_tx_acquire(txq); \
3703 #define HARD_TX_TRYLOCK(dev, txq) \
3704 (((dev->features & NETIF_F_LLTX) == 0) ? \
3705 __netif_tx_trylock(txq) : \
3706 __netif_tx_acquire(txq))
3708 #define HARD_TX_UNLOCK(dev, txq) { \
3709 if ((dev->features & NETIF_F_LLTX) == 0) { \
3710 __netif_tx_unlock(txq); \
3712 __netif_tx_release(txq); \
3716 static inline void netif_tx_disable(struct net_device *dev)
3722 cpu = smp_processor_id();
3723 for (i = 0; i < dev->num_tx_queues; i++) {
3724 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3726 __netif_tx_lock(txq, cpu);
3727 netif_tx_stop_queue(txq);
3728 __netif_tx_unlock(txq);
3733 static inline void netif_addr_lock(struct net_device *dev)
3735 spin_lock(&dev->addr_list_lock);
3738 static inline void netif_addr_lock_nested(struct net_device *dev)
3740 int subclass = SINGLE_DEPTH_NESTING;
3742 if (dev->netdev_ops->ndo_get_lock_subclass)
3743 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3745 spin_lock_nested(&dev->addr_list_lock, subclass);
3748 static inline void netif_addr_lock_bh(struct net_device *dev)
3750 spin_lock_bh(&dev->addr_list_lock);
3753 static inline void netif_addr_unlock(struct net_device *dev)
3755 spin_unlock(&dev->addr_list_lock);
3758 static inline void netif_addr_unlock_bh(struct net_device *dev)
3760 spin_unlock_bh(&dev->addr_list_lock);
3764 * dev_addrs walker. Should be used only for read access. Call with
3765 * rcu_read_lock held.
3767 #define for_each_dev_addr(dev, ha) \
3768 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3770 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3772 void ether_setup(struct net_device *dev);
3774 /* Support for loadable net-drivers */
3775 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3776 unsigned char name_assign_type,
3777 void (*setup)(struct net_device *),
3778 unsigned int txqs, unsigned int rxqs);
3779 int dev_get_valid_name(struct net *net, struct net_device *dev,
3782 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3783 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3785 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3786 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3789 int register_netdev(struct net_device *dev);
3790 void unregister_netdev(struct net_device *dev);
3792 /* General hardware address lists handling functions */
3793 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3794 struct netdev_hw_addr_list *from_list, int addr_len);
3795 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3796 struct netdev_hw_addr_list *from_list, int addr_len);
3797 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3798 struct net_device *dev,
3799 int (*sync)(struct net_device *, const unsigned char *),
3800 int (*unsync)(struct net_device *,
3801 const unsigned char *));
3802 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3803 struct net_device *dev,
3804 int (*unsync)(struct net_device *,
3805 const unsigned char *));
3806 void __hw_addr_init(struct netdev_hw_addr_list *list);
3808 /* Functions used for device addresses handling */
3809 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3810 unsigned char addr_type);
3811 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3812 unsigned char addr_type);
3813 void dev_addr_flush(struct net_device *dev);
3814 int dev_addr_init(struct net_device *dev);
3816 /* Functions used for unicast addresses handling */
3817 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3818 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3819 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3820 int dev_uc_sync(struct net_device *to, struct net_device *from);
3821 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3822 void dev_uc_unsync(struct net_device *to, struct net_device *from);
3823 void dev_uc_flush(struct net_device *dev);
3824 void dev_uc_init(struct net_device *dev);
3827 * __dev_uc_sync - Synchonize device's unicast list
3828 * @dev: device to sync
3829 * @sync: function to call if address should be added
3830 * @unsync: function to call if address should be removed
3832 * Add newly added addresses to the interface, and release
3833 * addresses that have been deleted.
3835 static inline int __dev_uc_sync(struct net_device *dev,
3836 int (*sync)(struct net_device *,
3837 const unsigned char *),
3838 int (*unsync)(struct net_device *,
3839 const unsigned char *))
3841 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3845 * __dev_uc_unsync - Remove synchronized addresses from device
3846 * @dev: device to sync
3847 * @unsync: function to call if address should be removed
3849 * Remove all addresses that were added to the device by dev_uc_sync().
3851 static inline void __dev_uc_unsync(struct net_device *dev,
3852 int (*unsync)(struct net_device *,
3853 const unsigned char *))
3855 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3858 /* Functions used for multicast addresses handling */
3859 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3860 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3861 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3862 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3863 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3864 int dev_mc_sync(struct net_device *to, struct net_device *from);
3865 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3866 void dev_mc_unsync(struct net_device *to, struct net_device *from);
3867 void dev_mc_flush(struct net_device *dev);
3868 void dev_mc_init(struct net_device *dev);
3871 * __dev_mc_sync - Synchonize device's multicast list
3872 * @dev: device to sync
3873 * @sync: function to call if address should be added
3874 * @unsync: function to call if address should be removed
3876 * Add newly added addresses to the interface, and release
3877 * addresses that have been deleted.
3879 static inline int __dev_mc_sync(struct net_device *dev,
3880 int (*sync)(struct net_device *,
3881 const unsigned char *),
3882 int (*unsync)(struct net_device *,
3883 const unsigned char *))
3885 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3889 * __dev_mc_unsync - Remove synchronized addresses from device
3890 * @dev: device to sync
3891 * @unsync: function to call if address should be removed
3893 * Remove all addresses that were added to the device by dev_mc_sync().
3895 static inline void __dev_mc_unsync(struct net_device *dev,
3896 int (*unsync)(struct net_device *,
3897 const unsigned char *))
3899 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3902 /* Functions used for secondary unicast and multicast support */
3903 void dev_set_rx_mode(struct net_device *dev);
3904 void __dev_set_rx_mode(struct net_device *dev);
3905 int dev_set_promiscuity(struct net_device *dev, int inc);
3906 int dev_set_allmulti(struct net_device *dev, int inc);
3907 void netdev_state_change(struct net_device *dev);
3908 void netdev_notify_peers(struct net_device *dev);
3909 void netdev_features_change(struct net_device *dev);
3910 /* Load a device via the kmod */
3911 void dev_load(struct net *net, const char *name);
3912 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3913 struct rtnl_link_stats64 *storage);
3914 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3915 const struct net_device_stats *netdev_stats);
3917 extern int netdev_max_backlog;
3918 extern int netdev_tstamp_prequeue;
3919 extern int weight_p;
3920 extern int dev_weight_rx_bias;
3921 extern int dev_weight_tx_bias;
3922 extern int dev_rx_weight;
3923 extern int dev_tx_weight;
3925 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3926 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3927 struct list_head **iter);
3928 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3929 struct list_head **iter);
3931 /* iterate through upper list, must be called under RCU read lock */
3932 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3933 for (iter = &(dev)->adj_list.upper, \
3934 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3936 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3938 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
3939 int (*fn)(struct net_device *upper_dev,
3943 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
3944 struct net_device *upper_dev);
3946 bool netdev_has_any_upper_dev(struct net_device *dev);
3948 void *netdev_lower_get_next_private(struct net_device *dev,
3949 struct list_head **iter);
3950 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3951 struct list_head **iter);
3953 #define netdev_for_each_lower_private(dev, priv, iter) \
3954 for (iter = (dev)->adj_list.lower.next, \
3955 priv = netdev_lower_get_next_private(dev, &(iter)); \
3957 priv = netdev_lower_get_next_private(dev, &(iter)))
3959 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3960 for (iter = &(dev)->adj_list.lower, \
3961 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3963 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3965 void *netdev_lower_get_next(struct net_device *dev,
3966 struct list_head **iter);
3968 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3969 for (iter = (dev)->adj_list.lower.next, \
3970 ldev = netdev_lower_get_next(dev, &(iter)); \
3972 ldev = netdev_lower_get_next(dev, &(iter)))
3974 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
3975 struct list_head **iter);
3976 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
3977 struct list_head **iter);
3979 int netdev_walk_all_lower_dev(struct net_device *dev,
3980 int (*fn)(struct net_device *lower_dev,
3983 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
3984 int (*fn)(struct net_device *lower_dev,
3988 void *netdev_adjacent_get_private(struct list_head *adj_list);
3989 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3990 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3991 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3992 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
3993 struct netlink_ext_ack *extack);
3994 int netdev_master_upper_dev_link(struct net_device *dev,
3995 struct net_device *upper_dev,
3996 void *upper_priv, void *upper_info,
3997 struct netlink_ext_ack *extack);
3998 void netdev_upper_dev_unlink(struct net_device *dev,
3999 struct net_device *upper_dev);
4000 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4001 void *netdev_lower_dev_get_private(struct net_device *dev,
4002 struct net_device *lower_dev);
4003 void netdev_lower_state_changed(struct net_device *lower_dev,
4004 void *lower_state_info);
4006 /* RSS keys are 40 or 52 bytes long */
4007 #define NETDEV_RSS_KEY_LEN 52
4008 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4009 void netdev_rss_key_fill(void *buffer, size_t len);
4011 int dev_get_nest_level(struct net_device *dev);
4012 int skb_checksum_help(struct sk_buff *skb);
4013 int skb_crc32c_csum_help(struct sk_buff *skb);
4014 int skb_csum_hwoffload_help(struct sk_buff *skb,
4015 const netdev_features_t features);
4017 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4018 netdev_features_t features, bool tx_path);
4019 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4020 netdev_features_t features);
4022 struct netdev_bonding_info {
4027 struct netdev_notifier_bonding_info {
4028 struct netdev_notifier_info info; /* must be first */
4029 struct netdev_bonding_info bonding_info;
4032 void netdev_bonding_info_change(struct net_device *dev,
4033 struct netdev_bonding_info *bonding_info);
4036 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4038 return __skb_gso_segment(skb, features, true);
4040 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4042 static inline bool can_checksum_protocol(netdev_features_t features,
4045 if (protocol == htons(ETH_P_FCOE))
4046 return !!(features & NETIF_F_FCOE_CRC);
4048 /* Assume this is an IP checksum (not SCTP CRC) */
4050 if (features & NETIF_F_HW_CSUM) {
4051 /* Can checksum everything */
4056 case htons(ETH_P_IP):
4057 return !!(features & NETIF_F_IP_CSUM);
4058 case htons(ETH_P_IPV6):
4059 return !!(features & NETIF_F_IPV6_CSUM);
4066 void netdev_rx_csum_fault(struct net_device *dev);
4068 static inline void netdev_rx_csum_fault(struct net_device *dev)
4072 /* rx skb timestamps */
4073 void net_enable_timestamp(void);
4074 void net_disable_timestamp(void);
4076 #ifdef CONFIG_PROC_FS
4077 int __init dev_proc_init(void);
4079 #define dev_proc_init() 0
4082 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4083 struct sk_buff *skb, struct net_device *dev,
4086 skb->xmit_more = more ? 1 : 0;
4087 return ops->ndo_start_xmit(skb, dev);
4090 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4091 struct netdev_queue *txq, bool more)
4093 const struct net_device_ops *ops = dev->netdev_ops;
4096 rc = __netdev_start_xmit(ops, skb, dev, more);
4097 if (rc == NETDEV_TX_OK)
4098 txq_trans_update(txq);
4103 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4105 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4108 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4110 return netdev_class_create_file_ns(class_attr, NULL);
4113 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4115 netdev_class_remove_file_ns(class_attr, NULL);
4118 extern const struct kobj_ns_type_operations net_ns_type_operations;
4120 const char *netdev_drivername(const struct net_device *dev);
4122 void linkwatch_run_queue(void);
4124 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4125 netdev_features_t f2)
4127 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4128 if (f1 & NETIF_F_HW_CSUM)
4129 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4131 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4137 static inline netdev_features_t netdev_get_wanted_features(
4138 struct net_device *dev)
4140 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4142 netdev_features_t netdev_increment_features(netdev_features_t all,
4143 netdev_features_t one, netdev_features_t mask);
4145 /* Allow TSO being used on stacked device :
4146 * Performing the GSO segmentation before last device
4147 * is a performance improvement.
4149 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4150 netdev_features_t mask)
4152 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4155 int __netdev_update_features(struct net_device *dev);
4156 void netdev_update_features(struct net_device *dev);
4157 void netdev_change_features(struct net_device *dev);
4159 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4160 struct net_device *dev);
4162 netdev_features_t passthru_features_check(struct sk_buff *skb,
4163 struct net_device *dev,
4164 netdev_features_t features);
4165 netdev_features_t netif_skb_features(struct sk_buff *skb);
4167 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4169 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4171 /* check flags correspondence */
4172 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4173 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4174 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4175 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4176 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4177 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4178 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4179 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4180 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4181 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4182 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4183 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4184 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4185 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4186 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4187 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4188 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4190 return (features & feature) == feature;
4193 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4195 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4196 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4199 static inline bool netif_needs_gso(struct sk_buff *skb,
4200 netdev_features_t features)
4202 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4203 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4204 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4207 static inline void netif_set_gso_max_size(struct net_device *dev,
4210 dev->gso_max_size = size;
4213 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4214 int pulled_hlen, u16 mac_offset,
4217 skb->protocol = protocol;
4218 skb->encapsulation = 1;
4219 skb_push(skb, pulled_hlen);
4220 skb_reset_transport_header(skb);
4221 skb->mac_header = mac_offset;
4222 skb->network_header = skb->mac_header + mac_len;
4223 skb->mac_len = mac_len;
4226 static inline bool netif_is_macsec(const struct net_device *dev)
4228 return dev->priv_flags & IFF_MACSEC;
4231 static inline bool netif_is_macvlan(const struct net_device *dev)
4233 return dev->priv_flags & IFF_MACVLAN;
4236 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4238 return dev->priv_flags & IFF_MACVLAN_PORT;
4241 static inline bool netif_is_bond_master(const struct net_device *dev)
4243 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4246 static inline bool netif_is_bond_slave(const struct net_device *dev)
4248 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4251 static inline bool netif_supports_nofcs(struct net_device *dev)
4253 return dev->priv_flags & IFF_SUPP_NOFCS;
4256 static inline bool netif_is_l3_master(const struct net_device *dev)
4258 return dev->priv_flags & IFF_L3MDEV_MASTER;
4261 static inline bool netif_is_l3_slave(const struct net_device *dev)
4263 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4266 static inline bool netif_is_bridge_master(const struct net_device *dev)
4268 return dev->priv_flags & IFF_EBRIDGE;
4271 static inline bool netif_is_bridge_port(const struct net_device *dev)
4273 return dev->priv_flags & IFF_BRIDGE_PORT;
4276 static inline bool netif_is_ovs_master(const struct net_device *dev)
4278 return dev->priv_flags & IFF_OPENVSWITCH;
4281 static inline bool netif_is_ovs_port(const struct net_device *dev)
4283 return dev->priv_flags & IFF_OVS_DATAPATH;
4286 static inline bool netif_is_team_master(const struct net_device *dev)
4288 return dev->priv_flags & IFF_TEAM;
4291 static inline bool netif_is_team_port(const struct net_device *dev)
4293 return dev->priv_flags & IFF_TEAM_PORT;
4296 static inline bool netif_is_lag_master(const struct net_device *dev)
4298 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4301 static inline bool netif_is_lag_port(const struct net_device *dev)
4303 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4306 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4308 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4311 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4312 static inline void netif_keep_dst(struct net_device *dev)
4314 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4317 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4318 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4320 /* TODO: reserve and use an additional IFF bit, if we get more users */
4321 return dev->priv_flags & IFF_MACSEC;
4324 extern struct pernet_operations __net_initdata loopback_net_ops;
4326 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4328 /* netdev_printk helpers, similar to dev_printk */
4330 static inline const char *netdev_name(const struct net_device *dev)
4332 if (!dev->name[0] || strchr(dev->name, '%'))
4333 return "(unnamed net_device)";
4337 static inline bool netdev_unregistering(const struct net_device *dev)
4339 return dev->reg_state == NETREG_UNREGISTERING;
4342 static inline const char *netdev_reg_state(const struct net_device *dev)
4344 switch (dev->reg_state) {
4345 case NETREG_UNINITIALIZED: return " (uninitialized)";
4346 case NETREG_REGISTERED: return "";
4347 case NETREG_UNREGISTERING: return " (unregistering)";
4348 case NETREG_UNREGISTERED: return " (unregistered)";
4349 case NETREG_RELEASED: return " (released)";
4350 case NETREG_DUMMY: return " (dummy)";
4353 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4354 return " (unknown)";
4358 void netdev_printk(const char *level, const struct net_device *dev,
4359 const char *format, ...);
4361 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4363 void netdev_alert(const struct net_device *dev, const char *format, ...);
4365 void netdev_crit(const struct net_device *dev, const char *format, ...);
4367 void netdev_err(const struct net_device *dev, const char *format, ...);
4369 void netdev_warn(const struct net_device *dev, const char *format, ...);
4371 void netdev_notice(const struct net_device *dev, const char *format, ...);
4373 void netdev_info(const struct net_device *dev, const char *format, ...);
4375 #define netdev_level_once(level, dev, fmt, ...) \
4377 static bool __print_once __read_mostly; \
4379 if (!__print_once) { \
4380 __print_once = true; \
4381 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4385 #define netdev_emerg_once(dev, fmt, ...) \
4386 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4387 #define netdev_alert_once(dev, fmt, ...) \
4388 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4389 #define netdev_crit_once(dev, fmt, ...) \
4390 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4391 #define netdev_err_once(dev, fmt, ...) \
4392 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4393 #define netdev_warn_once(dev, fmt, ...) \
4394 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4395 #define netdev_notice_once(dev, fmt, ...) \
4396 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4397 #define netdev_info_once(dev, fmt, ...) \
4398 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4400 #define MODULE_ALIAS_NETDEV(device) \
4401 MODULE_ALIAS("netdev-" device)
4403 #if defined(CONFIG_DYNAMIC_DEBUG)
4404 #define netdev_dbg(__dev, format, args...) \
4406 dynamic_netdev_dbg(__dev, format, ##args); \
4408 #elif defined(DEBUG)
4409 #define netdev_dbg(__dev, format, args...) \
4410 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4412 #define netdev_dbg(__dev, format, args...) \
4415 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4419 #if defined(VERBOSE_DEBUG)
4420 #define netdev_vdbg netdev_dbg
4423 #define netdev_vdbg(dev, format, args...) \
4426 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4432 * netdev_WARN() acts like dev_printk(), but with the key difference
4433 * of using a WARN/WARN_ON to get the message out, including the
4434 * file/line information and a backtrace.
4436 #define netdev_WARN(dev, format, args...) \
4437 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4438 netdev_reg_state(dev), ##args)
4440 #define netdev_WARN_ONCE(dev, format, args...) \
4441 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4442 netdev_reg_state(dev), ##args)
4444 /* netif printk helpers, similar to netdev_printk */
4446 #define netif_printk(priv, type, level, dev, fmt, args...) \
4448 if (netif_msg_##type(priv)) \
4449 netdev_printk(level, (dev), fmt, ##args); \
4452 #define netif_level(level, priv, type, dev, fmt, args...) \
4454 if (netif_msg_##type(priv)) \
4455 netdev_##level(dev, fmt, ##args); \
4458 #define netif_emerg(priv, type, dev, fmt, args...) \
4459 netif_level(emerg, priv, type, dev, fmt, ##args)
4460 #define netif_alert(priv, type, dev, fmt, args...) \
4461 netif_level(alert, priv, type, dev, fmt, ##args)
4462 #define netif_crit(priv, type, dev, fmt, args...) \
4463 netif_level(crit, priv, type, dev, fmt, ##args)
4464 #define netif_err(priv, type, dev, fmt, args...) \
4465 netif_level(err, priv, type, dev, fmt, ##args)
4466 #define netif_warn(priv, type, dev, fmt, args...) \
4467 netif_level(warn, priv, type, dev, fmt, ##args)
4468 #define netif_notice(priv, type, dev, fmt, args...) \
4469 netif_level(notice, priv, type, dev, fmt, ##args)
4470 #define netif_info(priv, type, dev, fmt, args...) \
4471 netif_level(info, priv, type, dev, fmt, ##args)
4473 #if defined(CONFIG_DYNAMIC_DEBUG)
4474 #define netif_dbg(priv, type, netdev, format, args...) \
4476 if (netif_msg_##type(priv)) \
4477 dynamic_netdev_dbg(netdev, format, ##args); \
4479 #elif defined(DEBUG)
4480 #define netif_dbg(priv, type, dev, format, args...) \
4481 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4483 #define netif_dbg(priv, type, dev, format, args...) \
4486 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4491 /* if @cond then downgrade to debug, else print at @level */
4492 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4495 netif_dbg(priv, type, netdev, fmt, ##args); \
4497 netif_ ## level(priv, type, netdev, fmt, ##args); \
4500 #if defined(VERBOSE_DEBUG)
4501 #define netif_vdbg netif_dbg
4503 #define netif_vdbg(priv, type, dev, format, args...) \
4506 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4512 * The list of packet types we will receive (as opposed to discard)
4513 * and the routines to invoke.
4515 * Why 16. Because with 16 the only overlap we get on a hash of the
4516 * low nibble of the protocol value is RARP/SNAP/X.25.
4530 #define PTYPE_HASH_SIZE (16)
4531 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4533 #endif /* _LINUX_NETDEVICE_H */