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/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
53 #include <uapi/linux/if_bonding.h>
54 #include <uapi/linux/pkt_cls.h>
55 #include <linux/hashtable.h>
62 /* 802.15.4 specific */
65 /* UDP Tunnel offloads */
66 struct udp_tunnel_info;
69 void netdev_set_default_ethtool_ops(struct net_device *dev,
70 const struct ethtool_ops *ops);
72 /* Backlog congestion levels */
73 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
74 #define NET_RX_DROP 1 /* packet dropped */
77 * Transmit return codes: transmit return codes originate from three different
80 * - qdisc return codes
81 * - driver transmit return codes
84 * Drivers are allowed to return any one of those in their hard_start_xmit()
85 * function. Real network devices commonly used with qdiscs should only return
86 * the driver transmit return codes though - when qdiscs are used, the actual
87 * transmission happens asynchronously, so the value is not propagated to
88 * higher layers. Virtual network devices transmit synchronously; in this case
89 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
90 * others are propagated to higher layers.
93 /* qdisc ->enqueue() return codes. */
94 #define NET_XMIT_SUCCESS 0x00
95 #define NET_XMIT_DROP 0x01 /* skb dropped */
96 #define NET_XMIT_CN 0x02 /* congestion notification */
97 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
99 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
100 * indicates that the device will soon be dropping packets, or already drops
101 * some packets of the same priority; prompting us to send less aggressively. */
102 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
103 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
105 /* Driver transmit return codes */
106 #define NETDEV_TX_MASK 0xf0
109 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
110 NETDEV_TX_OK = 0x00, /* driver took care of packet */
111 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
113 typedef enum netdev_tx netdev_tx_t;
116 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
117 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
119 static inline bool dev_xmit_complete(int rc)
122 * Positive cases with an skb consumed by a driver:
123 * - successful transmission (rc == NETDEV_TX_OK)
124 * - error while transmitting (rc < 0)
125 * - error while queueing to a different device (rc & NET_XMIT_MASK)
127 if (likely(rc < NET_XMIT_MASK))
134 * Compute the worst-case header length according to the protocols
138 #if defined(CONFIG_HYPERV_NET)
139 # define LL_MAX_HEADER 128
140 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
141 # if defined(CONFIG_MAC80211_MESH)
142 # define LL_MAX_HEADER 128
144 # define LL_MAX_HEADER 96
147 # define LL_MAX_HEADER 32
150 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
151 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
152 #define MAX_HEADER LL_MAX_HEADER
154 #define MAX_HEADER (LL_MAX_HEADER + 48)
158 * Old network device statistics. Fields are native words
159 * (unsigned long) so they can be read and written atomically.
162 struct net_device_stats {
163 unsigned long rx_packets;
164 unsigned long tx_packets;
165 unsigned long rx_bytes;
166 unsigned long tx_bytes;
167 unsigned long rx_errors;
168 unsigned long tx_errors;
169 unsigned long rx_dropped;
170 unsigned long tx_dropped;
171 unsigned long multicast;
172 unsigned long collisions;
173 unsigned long rx_length_errors;
174 unsigned long rx_over_errors;
175 unsigned long rx_crc_errors;
176 unsigned long rx_frame_errors;
177 unsigned long rx_fifo_errors;
178 unsigned long rx_missed_errors;
179 unsigned long tx_aborted_errors;
180 unsigned long tx_carrier_errors;
181 unsigned long tx_fifo_errors;
182 unsigned long tx_heartbeat_errors;
183 unsigned long tx_window_errors;
184 unsigned long rx_compressed;
185 unsigned long tx_compressed;
189 #include <linux/cache.h>
190 #include <linux/skbuff.h>
193 #include <linux/static_key.h>
194 extern struct static_key rps_needed;
195 extern struct static_key rfs_needed;
202 struct netdev_hw_addr {
203 struct list_head list;
204 unsigned char addr[MAX_ADDR_LEN];
206 #define NETDEV_HW_ADDR_T_LAN 1
207 #define NETDEV_HW_ADDR_T_SAN 2
208 #define NETDEV_HW_ADDR_T_SLAVE 3
209 #define NETDEV_HW_ADDR_T_UNICAST 4
210 #define NETDEV_HW_ADDR_T_MULTICAST 5
215 struct rcu_head rcu_head;
218 struct netdev_hw_addr_list {
219 struct list_head list;
223 #define netdev_hw_addr_list_count(l) ((l)->count)
224 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
225 #define netdev_hw_addr_list_for_each(ha, l) \
226 list_for_each_entry(ha, &(l)->list, list)
228 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
229 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
230 #define netdev_for_each_uc_addr(ha, dev) \
231 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
233 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
234 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
235 #define netdev_for_each_mc_addr(ha, dev) \
236 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 #define LL_RESERVED_SPACE(dev) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 int (*create) (struct sk_buff *skb, struct net_device *dev,
267 unsigned short type, const void *daddr,
268 const void *saddr, unsigned int len);
269 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
270 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
271 void (*cache_update)(struct hh_cache *hh,
272 const struct net_device *dev,
273 const unsigned char *haddr);
274 bool (*validate)(const char *ll_header, unsigned int len);
277 /* These flag bits are private to the generic network queueing
278 * layer; they may not be explicitly referenced by any other
282 enum netdev_state_t {
284 __LINK_STATE_PRESENT,
285 __LINK_STATE_NOCARRIER,
286 __LINK_STATE_LINKWATCH_PENDING,
287 __LINK_STATE_DORMANT,
292 * This structure holds boot-time configured netdevice settings. They
293 * are then used in the device probing.
295 struct netdev_boot_setup {
299 #define NETDEV_BOOT_SETUP_MAX 8
301 int __init netdev_boot_setup(char *str);
304 * Structure for NAPI scheduling similar to tasklet but with weighting
307 /* The poll_list must only be managed by the entity which
308 * changes the state of the NAPI_STATE_SCHED bit. This means
309 * whoever atomically sets that bit can add this napi_struct
310 * to the per-CPU poll_list, and whoever clears that bit
311 * can remove from the list right before clearing the bit.
313 struct list_head poll_list;
317 unsigned int gro_count;
318 int (*poll)(struct napi_struct *, int);
319 #ifdef CONFIG_NETPOLL
322 struct net_device *dev;
323 struct sk_buff *gro_list;
325 struct hrtimer timer;
326 struct list_head dev_list;
327 struct hlist_node napi_hash_node;
328 unsigned int napi_id;
332 NAPI_STATE_SCHED, /* Poll is scheduled */
333 NAPI_STATE_MISSED, /* reschedule a napi */
334 NAPI_STATE_DISABLE, /* Disable pending */
335 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
336 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
337 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
338 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
342 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
343 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
344 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
345 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
346 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
347 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
348 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
359 typedef enum gro_result gro_result_t;
362 * enum rx_handler_result - Possible return values for rx_handlers.
363 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
365 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
366 * case skb->dev was changed by rx_handler.
367 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
368 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
370 * rx_handlers are functions called from inside __netif_receive_skb(), to do
371 * special processing of the skb, prior to delivery to protocol handlers.
373 * Currently, a net_device can only have a single rx_handler registered. Trying
374 * to register a second rx_handler will return -EBUSY.
376 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
377 * To unregister a rx_handler on a net_device, use
378 * netdev_rx_handler_unregister().
380 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
383 * If the rx_handler consumed the skb in some way, it should return
384 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
385 * the skb to be delivered in some other way.
387 * If the rx_handler changed skb->dev, to divert the skb to another
388 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
389 * new device will be called if it exists.
391 * If the rx_handler decides the skb should be ignored, it should return
392 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
393 * are registered on exact device (ptype->dev == skb->dev).
395 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
396 * delivered, it should return RX_HANDLER_PASS.
398 * A device without a registered rx_handler will behave as if rx_handler
399 * returned RX_HANDLER_PASS.
402 enum rx_handler_result {
408 typedef enum rx_handler_result rx_handler_result_t;
409 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
411 void __napi_schedule(struct napi_struct *n);
412 void __napi_schedule_irqoff(struct napi_struct *n);
414 static inline bool napi_disable_pending(struct napi_struct *n)
416 return test_bit(NAPI_STATE_DISABLE, &n->state);
419 bool napi_schedule_prep(struct napi_struct *n);
422 * napi_schedule - schedule NAPI poll
425 * Schedule NAPI poll routine to be called if it is not already
428 static inline void napi_schedule(struct napi_struct *n)
430 if (napi_schedule_prep(n))
435 * napi_schedule_irqoff - schedule NAPI poll
438 * Variant of napi_schedule(), assuming hard irqs are masked.
440 static inline void napi_schedule_irqoff(struct napi_struct *n)
442 if (napi_schedule_prep(n))
443 __napi_schedule_irqoff(n);
446 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
447 static inline bool napi_reschedule(struct napi_struct *napi)
449 if (napi_schedule_prep(napi)) {
450 __napi_schedule(napi);
456 bool napi_complete_done(struct napi_struct *n, int work_done);
458 * napi_complete - NAPI processing complete
461 * Mark NAPI processing as complete.
462 * Consider using napi_complete_done() instead.
463 * Return false if device should avoid rearming interrupts.
465 static inline bool napi_complete(struct napi_struct *n)
467 return napi_complete_done(n, 0);
471 * napi_hash_del - remove a NAPI from global table
472 * @napi: NAPI context
474 * Warning: caller must observe RCU grace period
475 * before freeing memory containing @napi, if
476 * this function returns true.
477 * Note: core networking stack automatically calls it
478 * from netif_napi_del().
479 * Drivers might want to call this helper to combine all
480 * the needed RCU grace periods into a single one.
482 bool napi_hash_del(struct napi_struct *napi);
485 * napi_disable - prevent NAPI from scheduling
488 * Stop NAPI from being scheduled on this context.
489 * Waits till any outstanding processing completes.
491 void napi_disable(struct napi_struct *n);
494 * napi_enable - enable NAPI scheduling
497 * Resume NAPI from being scheduled on this context.
498 * Must be paired with napi_disable.
500 static inline void napi_enable(struct napi_struct *n)
502 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
503 smp_mb__before_atomic();
504 clear_bit(NAPI_STATE_SCHED, &n->state);
505 clear_bit(NAPI_STATE_NPSVC, &n->state);
509 * napi_synchronize - wait until NAPI is not running
512 * Wait until NAPI is done being scheduled on this context.
513 * Waits till any outstanding processing completes but
514 * does not disable future activations.
516 static inline void napi_synchronize(const struct napi_struct *n)
518 if (IS_ENABLED(CONFIG_SMP))
519 while (test_bit(NAPI_STATE_SCHED, &n->state))
525 enum netdev_queue_state_t {
526 __QUEUE_STATE_DRV_XOFF,
527 __QUEUE_STATE_STACK_XOFF,
528 __QUEUE_STATE_FROZEN,
531 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
532 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
533 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
535 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
536 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
538 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
542 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
543 * netif_tx_* functions below are used to manipulate this flag. The
544 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
545 * queue independently. The netif_xmit_*stopped functions below are called
546 * to check if the queue has been stopped by the driver or stack (either
547 * of the XOFF bits are set in the state). Drivers should not need to call
548 * netif_xmit*stopped functions, they should only be using netif_tx_*.
551 struct netdev_queue {
555 struct net_device *dev;
556 struct Qdisc __rcu *qdisc;
557 struct Qdisc *qdisc_sleeping;
561 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
564 unsigned long tx_maxrate;
566 * Number of TX timeouts for this queue
567 * (/sys/class/net/DEV/Q/trans_timeout)
569 unsigned long trans_timeout;
573 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
576 * Time (in jiffies) of last Tx
578 unsigned long trans_start;
585 } ____cacheline_aligned_in_smp;
587 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
589 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
596 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
598 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
605 * This structure holds an RPS map which can be of variable length. The
606 * map is an array of CPUs.
613 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
616 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
617 * tail pointer for that CPU's input queue at the time of last enqueue, and
618 * a hardware filter index.
620 struct rps_dev_flow {
623 unsigned int last_qtail;
625 #define RPS_NO_FILTER 0xffff
628 * The rps_dev_flow_table structure contains a table of flow mappings.
630 struct rps_dev_flow_table {
633 struct rps_dev_flow flows[0];
635 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
636 ((_num) * sizeof(struct rps_dev_flow)))
639 * The rps_sock_flow_table contains mappings of flows to the last CPU
640 * on which they were processed by the application (set in recvmsg).
641 * Each entry is a 32bit value. Upper part is the high-order bits
642 * of flow hash, lower part is CPU number.
643 * rps_cpu_mask is used to partition the space, depending on number of
644 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
645 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
646 * meaning we use 32-6=26 bits for the hash.
648 struct rps_sock_flow_table {
651 u32 ents[0] ____cacheline_aligned_in_smp;
653 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
655 #define RPS_NO_CPU 0xffff
657 extern u32 rps_cpu_mask;
658 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
660 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
664 unsigned int index = hash & table->mask;
665 u32 val = hash & ~rps_cpu_mask;
667 /* We only give a hint, preemption can change CPU under us */
668 val |= raw_smp_processor_id();
670 if (table->ents[index] != val)
671 table->ents[index] = val;
675 #ifdef CONFIG_RFS_ACCEL
676 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
679 #endif /* CONFIG_RPS */
681 /* This structure contains an instance of an RX queue. */
682 struct netdev_rx_queue {
684 struct rps_map __rcu *rps_map;
685 struct rps_dev_flow_table __rcu *rps_flow_table;
688 struct net_device *dev;
689 } ____cacheline_aligned_in_smp;
692 * RX queue sysfs structures and functions.
694 struct rx_queue_attribute {
695 struct attribute attr;
696 ssize_t (*show)(struct netdev_rx_queue *queue,
697 struct rx_queue_attribute *attr, char *buf);
698 ssize_t (*store)(struct netdev_rx_queue *queue,
699 struct rx_queue_attribute *attr, const char *buf, size_t len);
704 * This structure holds an XPS map which can be of variable length. The
705 * map is an array of queues.
709 unsigned int alloc_len;
713 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
714 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
715 - sizeof(struct xps_map)) / sizeof(u16))
718 * This structure holds all XPS maps for device. Maps are indexed by CPU.
720 struct xps_dev_maps {
722 struct xps_map __rcu *cpu_map[0];
724 #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
725 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
726 #endif /* CONFIG_XPS */
728 #define TC_MAX_QUEUE 16
729 #define TC_BITMASK 15
730 /* HW offloaded queuing disciplines txq count and offset maps */
731 struct netdev_tc_txq {
736 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
738 * This structure is to hold information about the device
739 * configured to run FCoE protocol stack.
741 struct netdev_fcoe_hbainfo {
742 char manufacturer[64];
743 char serial_number[64];
744 char hardware_version[64];
745 char driver_version[64];
746 char optionrom_version[64];
747 char firmware_version[64];
749 char model_description[256];
753 #define MAX_PHYS_ITEM_ID_LEN 32
755 /* This structure holds a unique identifier to identify some
756 * physical item (port for example) used by a netdevice.
758 struct netdev_phys_item_id {
759 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
760 unsigned char id_len;
763 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
764 struct netdev_phys_item_id *b)
766 return a->id_len == b->id_len &&
767 memcmp(a->id, b->id, a->id_len) == 0;
770 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
771 struct sk_buff *skb);
773 /* These structures hold the attributes of qdisc and classifiers
774 * that are being passed to the netdevice through the setup_tc op.
784 struct tc_cls_u32_offload;
786 struct tc_to_netdev {
790 struct tc_cls_u32_offload *cls_u32;
791 struct tc_cls_flower_offload *cls_flower;
792 struct tc_cls_matchall_offload *cls_mall;
793 struct tc_cls_bpf_offload *cls_bpf;
798 /* These structures hold the attributes of xdp state that are being passed
799 * to the netdevice through the xdp op.
801 enum xdp_netdev_command {
802 /* Set or clear a bpf program used in the earliest stages of packet
803 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
804 * is responsible for calling bpf_prog_put on any old progs that are
805 * stored. In case of error, the callee need not release the new prog
806 * reference, but on success it takes ownership and must bpf_prog_put
807 * when it is no longer used.
810 /* Check if a bpf program is set on the device. The callee should
811 * return true if a program is currently attached and running.
817 enum xdp_netdev_command command;
820 struct bpf_prog *prog;
827 * This structure defines the management hooks for network devices.
828 * The following hooks can be defined; unless noted otherwise, they are
829 * optional and can be filled with a null pointer.
831 * int (*ndo_init)(struct net_device *dev);
832 * This function is called once when a network device is registered.
833 * The network device can use this for any late stage initialization
834 * or semantic validation. It can fail with an error code which will
835 * be propagated back to register_netdev.
837 * void (*ndo_uninit)(struct net_device *dev);
838 * This function is called when device is unregistered or when registration
839 * fails. It is not called if init fails.
841 * int (*ndo_open)(struct net_device *dev);
842 * This function is called when a network device transitions to the up
845 * int (*ndo_stop)(struct net_device *dev);
846 * This function is called when a network device transitions to the down
849 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
850 * struct net_device *dev);
851 * Called when a packet needs to be transmitted.
852 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
853 * the queue before that can happen; it's for obsolete devices and weird
854 * corner cases, but the stack really does a non-trivial amount
855 * of useless work if you return NETDEV_TX_BUSY.
856 * Required; cannot be NULL.
858 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
859 * struct net_device *dev
860 * netdev_features_t features);
861 * Called by core transmit path to determine if device is capable of
862 * performing offload operations on a given packet. This is to give
863 * the device an opportunity to implement any restrictions that cannot
864 * be otherwise expressed by feature flags. The check is called with
865 * the set of features that the stack has calculated and it returns
866 * those the driver believes to be appropriate.
868 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
869 * void *accel_priv, select_queue_fallback_t fallback);
870 * Called to decide which queue to use when device supports multiple
873 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
874 * This function is called to allow device receiver to make
875 * changes to configuration when multicast or promiscuous is enabled.
877 * void (*ndo_set_rx_mode)(struct net_device *dev);
878 * This function is called device changes address list filtering.
879 * If driver handles unicast address filtering, it should set
880 * IFF_UNICAST_FLT in its priv_flags.
882 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
883 * This function is called when the Media Access Control address
884 * needs to be changed. If this interface is not defined, the
885 * MAC address can not be changed.
887 * int (*ndo_validate_addr)(struct net_device *dev);
888 * Test if Media Access Control address is valid for the device.
890 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
891 * Called when a user requests an ioctl which can't be handled by
892 * the generic interface code. If not defined ioctls return
893 * not supported error code.
895 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
896 * Used to set network devices bus interface parameters. This interface
897 * is retained for legacy reasons; new devices should use the bus
898 * interface (PCI) for low level management.
900 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
901 * Called when a user wants to change the Maximum Transfer Unit
902 * of a device. If not defined, any request to change MTU will
903 * will return an error.
905 * void (*ndo_tx_timeout)(struct net_device *dev);
906 * Callback used when the transmitter has not made any progress
907 * for dev->watchdog ticks.
909 * void (*ndo_get_stats64)(struct net_device *dev,
910 * struct rtnl_link_stats64 *storage);
911 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
912 * Called when a user wants to get the network device usage
913 * statistics. Drivers must do one of the following:
914 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
915 * rtnl_link_stats64 structure passed by the caller.
916 * 2. Define @ndo_get_stats to update a net_device_stats structure
917 * (which should normally be dev->stats) and return a pointer to
918 * it. The structure may be changed asynchronously only if each
919 * field is written atomically.
920 * 3. Update dev->stats asynchronously and atomically, and define
923 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
924 * Return true if this device supports offload stats of this attr_id.
926 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
928 * Get statistics for offload operations by attr_id. Write it into the
931 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
932 * If device supports VLAN filtering this function is called when a
933 * VLAN id is registered.
935 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
936 * If device supports VLAN filtering this function is called when a
937 * VLAN id is unregistered.
939 * void (*ndo_poll_controller)(struct net_device *dev);
941 * SR-IOV management functions.
942 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
943 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
944 * u8 qos, __be16 proto);
945 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
947 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
948 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
949 * int (*ndo_get_vf_config)(struct net_device *dev,
950 * int vf, struct ifla_vf_info *ivf);
951 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
952 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
953 * struct nlattr *port[]);
955 * Enable or disable the VF ability to query its RSS Redirection Table and
956 * Hash Key. This is needed since on some devices VF share this information
957 * with PF and querying it may introduce a theoretical security risk.
958 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
959 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
960 * int (*ndo_setup_tc)(struct net_device *dev, u32 handle,
961 * __be16 protocol, struct tc_to_netdev *tc);
962 * Called to setup any 'tc' scheduler, classifier or action on @dev.
963 * This is always called from the stack with the rtnl lock held and netif
964 * tx queues stopped. This allows the netdevice to perform queue
967 * Fiber Channel over Ethernet (FCoE) offload functions.
968 * int (*ndo_fcoe_enable)(struct net_device *dev);
969 * Called when the FCoE protocol stack wants to start using LLD for FCoE
970 * so the underlying device can perform whatever needed configuration or
971 * initialization to support acceleration of FCoE traffic.
973 * int (*ndo_fcoe_disable)(struct net_device *dev);
974 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
975 * so the underlying device can perform whatever needed clean-ups to
976 * stop supporting acceleration of FCoE traffic.
978 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
979 * struct scatterlist *sgl, unsigned int sgc);
980 * Called when the FCoE Initiator wants to initialize an I/O that
981 * is a possible candidate for Direct Data Placement (DDP). The LLD can
982 * perform necessary setup and returns 1 to indicate the device is set up
983 * successfully to perform DDP on this I/O, otherwise this returns 0.
985 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
986 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
987 * indicated by the FC exchange id 'xid', so the underlying device can
988 * clean up and reuse resources for later DDP requests.
990 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
991 * struct scatterlist *sgl, unsigned int sgc);
992 * Called when the FCoE Target wants to initialize an I/O that
993 * is a possible candidate for Direct Data Placement (DDP). The LLD can
994 * perform necessary setup and returns 1 to indicate the device is set up
995 * successfully to perform DDP on this I/O, otherwise this returns 0.
997 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
998 * struct netdev_fcoe_hbainfo *hbainfo);
999 * Called when the FCoE Protocol stack wants information on the underlying
1000 * device. This information is utilized by the FCoE protocol stack to
1001 * register attributes with Fiber Channel management service as per the
1002 * FC-GS Fabric Device Management Information(FDMI) specification.
1004 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1005 * Called when the underlying device wants to override default World Wide
1006 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1007 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1008 * protocol stack to use.
1011 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1012 * u16 rxq_index, u32 flow_id);
1013 * Set hardware filter for RFS. rxq_index is the target queue index;
1014 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1015 * Return the filter ID on success, or a negative error code.
1017 * Slave management functions (for bridge, bonding, etc).
1018 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1019 * Called to make another netdev an underling.
1021 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1022 * Called to release previously enslaved netdev.
1024 * Feature/offload setting functions.
1025 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1026 * netdev_features_t features);
1027 * Adjusts the requested feature flags according to device-specific
1028 * constraints, and returns the resulting flags. Must not modify
1031 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1032 * Called to update device configuration to new features. Passed
1033 * feature set might be less than what was returned by ndo_fix_features()).
1034 * Must return >0 or -errno if it changed dev->features itself.
1036 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1037 * struct net_device *dev,
1038 * const unsigned char *addr, u16 vid, u16 flags)
1039 * Adds an FDB entry to dev for addr.
1040 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1041 * struct net_device *dev,
1042 * const unsigned char *addr, u16 vid)
1043 * Deletes the FDB entry from dev coresponding to addr.
1044 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1045 * struct net_device *dev, struct net_device *filter_dev,
1047 * Used to add FDB entries to dump requests. Implementers should add
1048 * entries to skb and update idx with the number of entries.
1050 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1052 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1053 * struct net_device *dev, u32 filter_mask,
1055 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1058 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1059 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1060 * which do not represent real hardware may define this to allow their
1061 * userspace components to manage their virtual carrier state. Devices
1062 * that determine carrier state from physical hardware properties (eg
1063 * network cables) or protocol-dependent mechanisms (eg
1064 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1066 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1067 * struct netdev_phys_item_id *ppid);
1068 * Called to get ID of physical port of this device. If driver does
1069 * not implement this, it is assumed that the hw is not able to have
1070 * multiple net devices on single physical port.
1072 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1073 * struct udp_tunnel_info *ti);
1074 * Called by UDP tunnel to notify a driver about the UDP port and socket
1075 * address family that a UDP tunnel is listnening to. It is called only
1076 * when a new port starts listening. The operation is protected by the
1079 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1080 * struct udp_tunnel_info *ti);
1081 * Called by UDP tunnel to notify the driver about a UDP port and socket
1082 * address family that the UDP tunnel is not listening to anymore. The
1083 * operation is protected by the RTNL.
1085 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1086 * struct net_device *dev)
1087 * Called by upper layer devices to accelerate switching or other
1088 * station functionality into hardware. 'pdev is the lowerdev
1089 * to use for the offload and 'dev' is the net device that will
1090 * back the offload. Returns a pointer to the private structure
1091 * the upper layer will maintain.
1092 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1093 * Called by upper layer device to delete the station created
1094 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1095 * the station and priv is the structure returned by the add
1097 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
1098 * struct net_device *dev,
1100 * Callback to use for xmit over the accelerated station. This
1101 * is used in place of ndo_start_xmit on accelerated net
1103 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1104 * int queue_index, u32 maxrate);
1105 * Called when a user wants to set a max-rate limitation of specific
1107 * int (*ndo_get_iflink)(const struct net_device *dev);
1108 * Called to get the iflink value of this device.
1109 * void (*ndo_change_proto_down)(struct net_device *dev,
1111 * This function is used to pass protocol port error state information
1112 * to the switch driver. The switch driver can react to the proto_down
1113 * by doing a phys down on the associated switch port.
1114 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1115 * This function is used to get egress tunnel information for given skb.
1116 * This is useful for retrieving outer tunnel header parameters while
1118 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1119 * This function is used to specify the headroom that the skb must
1120 * consider when allocation skb during packet reception. Setting
1121 * appropriate rx headroom value allows avoiding skb head copy on
1122 * forward. Setting a negative value resets the rx headroom to the
1124 * int (*ndo_xdp)(struct net_device *dev, struct netdev_xdp *xdp);
1125 * This function is used to set or query state related to XDP on the
1126 * netdevice. See definition of enum xdp_netdev_command for details.
1129 struct net_device_ops {
1130 int (*ndo_init)(struct net_device *dev);
1131 void (*ndo_uninit)(struct net_device *dev);
1132 int (*ndo_open)(struct net_device *dev);
1133 int (*ndo_stop)(struct net_device *dev);
1134 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1135 struct net_device *dev);
1136 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1137 struct net_device *dev,
1138 netdev_features_t features);
1139 u16 (*ndo_select_queue)(struct net_device *dev,
1140 struct sk_buff *skb,
1142 select_queue_fallback_t fallback);
1143 void (*ndo_change_rx_flags)(struct net_device *dev,
1145 void (*ndo_set_rx_mode)(struct net_device *dev);
1146 int (*ndo_set_mac_address)(struct net_device *dev,
1148 int (*ndo_validate_addr)(struct net_device *dev);
1149 int (*ndo_do_ioctl)(struct net_device *dev,
1150 struct ifreq *ifr, int cmd);
1151 int (*ndo_set_config)(struct net_device *dev,
1153 int (*ndo_change_mtu)(struct net_device *dev,
1155 int (*ndo_neigh_setup)(struct net_device *dev,
1156 struct neigh_parms *);
1157 void (*ndo_tx_timeout) (struct net_device *dev);
1159 void (*ndo_get_stats64)(struct net_device *dev,
1160 struct rtnl_link_stats64 *storage);
1161 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1162 int (*ndo_get_offload_stats)(int attr_id,
1163 const struct net_device *dev,
1165 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1167 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1168 __be16 proto, u16 vid);
1169 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1170 __be16 proto, u16 vid);
1171 #ifdef CONFIG_NET_POLL_CONTROLLER
1172 void (*ndo_poll_controller)(struct net_device *dev);
1173 int (*ndo_netpoll_setup)(struct net_device *dev,
1174 struct netpoll_info *info);
1175 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1177 int (*ndo_set_vf_mac)(struct net_device *dev,
1178 int queue, u8 *mac);
1179 int (*ndo_set_vf_vlan)(struct net_device *dev,
1180 int queue, u16 vlan,
1181 u8 qos, __be16 proto);
1182 int (*ndo_set_vf_rate)(struct net_device *dev,
1183 int vf, int min_tx_rate,
1185 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1186 int vf, bool setting);
1187 int (*ndo_set_vf_trust)(struct net_device *dev,
1188 int vf, bool setting);
1189 int (*ndo_get_vf_config)(struct net_device *dev,
1191 struct ifla_vf_info *ivf);
1192 int (*ndo_set_vf_link_state)(struct net_device *dev,
1193 int vf, int link_state);
1194 int (*ndo_get_vf_stats)(struct net_device *dev,
1196 struct ifla_vf_stats
1198 int (*ndo_set_vf_port)(struct net_device *dev,
1200 struct nlattr *port[]);
1201 int (*ndo_get_vf_port)(struct net_device *dev,
1202 int vf, struct sk_buff *skb);
1203 int (*ndo_set_vf_guid)(struct net_device *dev,
1206 int (*ndo_set_vf_rss_query_en)(
1207 struct net_device *dev,
1208 int vf, bool setting);
1209 int (*ndo_setup_tc)(struct net_device *dev,
1212 struct tc_to_netdev *tc);
1213 #if IS_ENABLED(CONFIG_FCOE)
1214 int (*ndo_fcoe_enable)(struct net_device *dev);
1215 int (*ndo_fcoe_disable)(struct net_device *dev);
1216 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1218 struct scatterlist *sgl,
1220 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1222 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1224 struct scatterlist *sgl,
1226 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1227 struct netdev_fcoe_hbainfo *hbainfo);
1230 #if IS_ENABLED(CONFIG_LIBFCOE)
1231 #define NETDEV_FCOE_WWNN 0
1232 #define NETDEV_FCOE_WWPN 1
1233 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1234 u64 *wwn, int type);
1237 #ifdef CONFIG_RFS_ACCEL
1238 int (*ndo_rx_flow_steer)(struct net_device *dev,
1239 const struct sk_buff *skb,
1243 int (*ndo_add_slave)(struct net_device *dev,
1244 struct net_device *slave_dev);
1245 int (*ndo_del_slave)(struct net_device *dev,
1246 struct net_device *slave_dev);
1247 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1248 netdev_features_t features);
1249 int (*ndo_set_features)(struct net_device *dev,
1250 netdev_features_t features);
1251 int (*ndo_neigh_construct)(struct net_device *dev,
1252 struct neighbour *n);
1253 void (*ndo_neigh_destroy)(struct net_device *dev,
1254 struct neighbour *n);
1256 int (*ndo_fdb_add)(struct ndmsg *ndm,
1257 struct nlattr *tb[],
1258 struct net_device *dev,
1259 const unsigned char *addr,
1262 int (*ndo_fdb_del)(struct ndmsg *ndm,
1263 struct nlattr *tb[],
1264 struct net_device *dev,
1265 const unsigned char *addr,
1267 int (*ndo_fdb_dump)(struct sk_buff *skb,
1268 struct netlink_callback *cb,
1269 struct net_device *dev,
1270 struct net_device *filter_dev,
1273 int (*ndo_bridge_setlink)(struct net_device *dev,
1274 struct nlmsghdr *nlh,
1276 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1278 struct net_device *dev,
1281 int (*ndo_bridge_dellink)(struct net_device *dev,
1282 struct nlmsghdr *nlh,
1284 int (*ndo_change_carrier)(struct net_device *dev,
1286 int (*ndo_get_phys_port_id)(struct net_device *dev,
1287 struct netdev_phys_item_id *ppid);
1288 int (*ndo_get_phys_port_name)(struct net_device *dev,
1289 char *name, size_t len);
1290 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1291 struct udp_tunnel_info *ti);
1292 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1293 struct udp_tunnel_info *ti);
1294 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1295 struct net_device *dev);
1296 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1299 netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb,
1300 struct net_device *dev,
1302 int (*ndo_get_lock_subclass)(struct net_device *dev);
1303 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1306 int (*ndo_get_iflink)(const struct net_device *dev);
1307 int (*ndo_change_proto_down)(struct net_device *dev,
1309 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1310 struct sk_buff *skb);
1311 void (*ndo_set_rx_headroom)(struct net_device *dev,
1312 int needed_headroom);
1313 int (*ndo_xdp)(struct net_device *dev,
1314 struct netdev_xdp *xdp);
1318 * enum net_device_priv_flags - &struct net_device priv_flags
1320 * These are the &struct net_device, they are only set internally
1321 * by drivers and used in the kernel. These flags are invisible to
1322 * userspace; this means that the order of these flags can change
1323 * during any kernel release.
1325 * You should have a pretty good reason to be extending these flags.
1327 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1328 * @IFF_EBRIDGE: Ethernet bridging device
1329 * @IFF_BONDING: bonding master or slave
1330 * @IFF_ISATAP: ISATAP interface (RFC4214)
1331 * @IFF_WAN_HDLC: WAN HDLC device
1332 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1334 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1335 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1336 * @IFF_MACVLAN_PORT: device used as macvlan port
1337 * @IFF_BRIDGE_PORT: device used as bridge port
1338 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1339 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1340 * @IFF_UNICAST_FLT: Supports unicast filtering
1341 * @IFF_TEAM_PORT: device used as team port
1342 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1343 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1344 * change when it's running
1345 * @IFF_MACVLAN: Macvlan device
1346 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1347 * underlying stacked devices
1348 * @IFF_IPVLAN_MASTER: IPvlan master device
1349 * @IFF_IPVLAN_SLAVE: IPvlan slave device
1350 * @IFF_L3MDEV_MASTER: device is an L3 master device
1351 * @IFF_NO_QUEUE: device can run without qdisc attached
1352 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1353 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1354 * @IFF_TEAM: device is a team device
1355 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1356 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1357 * entity (i.e. the master device for bridged veth)
1358 * @IFF_MACSEC: device is a MACsec device
1360 enum netdev_priv_flags {
1361 IFF_802_1Q_VLAN = 1<<0,
1365 IFF_WAN_HDLC = 1<<4,
1366 IFF_XMIT_DST_RELEASE = 1<<5,
1367 IFF_DONT_BRIDGE = 1<<6,
1368 IFF_DISABLE_NETPOLL = 1<<7,
1369 IFF_MACVLAN_PORT = 1<<8,
1370 IFF_BRIDGE_PORT = 1<<9,
1371 IFF_OVS_DATAPATH = 1<<10,
1372 IFF_TX_SKB_SHARING = 1<<11,
1373 IFF_UNICAST_FLT = 1<<12,
1374 IFF_TEAM_PORT = 1<<13,
1375 IFF_SUPP_NOFCS = 1<<14,
1376 IFF_LIVE_ADDR_CHANGE = 1<<15,
1377 IFF_MACVLAN = 1<<16,
1378 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1379 IFF_IPVLAN_MASTER = 1<<18,
1380 IFF_IPVLAN_SLAVE = 1<<19,
1381 IFF_L3MDEV_MASTER = 1<<20,
1382 IFF_NO_QUEUE = 1<<21,
1383 IFF_OPENVSWITCH = 1<<22,
1384 IFF_L3MDEV_SLAVE = 1<<23,
1386 IFF_RXFH_CONFIGURED = 1<<25,
1387 IFF_PHONY_HEADROOM = 1<<26,
1391 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1392 #define IFF_EBRIDGE IFF_EBRIDGE
1393 #define IFF_BONDING IFF_BONDING
1394 #define IFF_ISATAP IFF_ISATAP
1395 #define IFF_WAN_HDLC IFF_WAN_HDLC
1396 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1397 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1398 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1399 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1400 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1401 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1402 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1403 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1404 #define IFF_TEAM_PORT IFF_TEAM_PORT
1405 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1406 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1407 #define IFF_MACVLAN IFF_MACVLAN
1408 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1409 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1410 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1411 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1412 #define IFF_NO_QUEUE IFF_NO_QUEUE
1413 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1414 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1415 #define IFF_TEAM IFF_TEAM
1416 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1417 #define IFF_MACSEC IFF_MACSEC
1420 * struct net_device - The DEVICE structure.
1421 * Actually, this whole structure is a big mistake. It mixes I/O
1422 * data with strictly "high-level" data, and it has to know about
1423 * almost every data structure used in the INET module.
1425 * @name: This is the first field of the "visible" part of this structure
1426 * (i.e. as seen by users in the "Space.c" file). It is the name
1429 * @name_hlist: Device name hash chain, please keep it close to name[]
1430 * @ifalias: SNMP alias
1431 * @mem_end: Shared memory end
1432 * @mem_start: Shared memory start
1433 * @base_addr: Device I/O address
1434 * @irq: Device IRQ number
1436 * @carrier_changes: Stats to monitor carrier on<->off transitions
1438 * @state: Generic network queuing layer state, see netdev_state_t
1439 * @dev_list: The global list of network devices
1440 * @napi_list: List entry used for polling NAPI devices
1441 * @unreg_list: List entry when we are unregistering the
1442 * device; see the function unregister_netdev
1443 * @close_list: List entry used when we are closing the device
1444 * @ptype_all: Device-specific packet handlers for all protocols
1445 * @ptype_specific: Device-specific, protocol-specific packet handlers
1447 * @adj_list: Directly linked devices, like slaves for bonding
1448 * @features: Currently active device features
1449 * @hw_features: User-changeable features
1451 * @wanted_features: User-requested features
1452 * @vlan_features: Mask of features inheritable by VLAN devices
1454 * @hw_enc_features: Mask of features inherited by encapsulating devices
1455 * This field indicates what encapsulation
1456 * offloads the hardware is capable of doing,
1457 * and drivers will need to set them appropriately.
1459 * @mpls_features: Mask of features inheritable by MPLS
1461 * @ifindex: interface index
1462 * @group: The group the device belongs to
1464 * @stats: Statistics struct, which was left as a legacy, use
1465 * rtnl_link_stats64 instead
1467 * @rx_dropped: Dropped packets by core network,
1468 * do not use this in drivers
1469 * @tx_dropped: Dropped packets by core network,
1470 * do not use this in drivers
1471 * @rx_nohandler: nohandler dropped packets by core network on
1472 * inactive devices, do not use this in drivers
1474 * @wireless_handlers: List of functions to handle Wireless Extensions,
1476 * see <net/iw_handler.h> for details.
1477 * @wireless_data: Instance data managed by the core of wireless extensions
1479 * @netdev_ops: Includes several pointers to callbacks,
1480 * if one wants to override the ndo_*() functions
1481 * @ethtool_ops: Management operations
1482 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1483 * discovery handling. Necessary for e.g. 6LoWPAN.
1484 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1485 * of Layer 2 headers.
1487 * @flags: Interface flags (a la BSD)
1488 * @priv_flags: Like 'flags' but invisible to userspace,
1489 * see if.h for the definitions
1490 * @gflags: Global flags ( kept as legacy )
1491 * @padded: How much padding added by alloc_netdev()
1492 * @operstate: RFC2863 operstate
1493 * @link_mode: Mapping policy to operstate
1494 * @if_port: Selectable AUI, TP, ...
1496 * @mtu: Interface MTU value
1497 * @min_mtu: Interface Minimum MTU value
1498 * @max_mtu: Interface Maximum MTU value
1499 * @type: Interface hardware type
1500 * @hard_header_len: Maximum hardware header length.
1501 * @min_header_len: Minimum hardware header length
1503 * @needed_headroom: Extra headroom the hardware may need, but not in all
1504 * cases can this be guaranteed
1505 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1506 * cases can this be guaranteed. Some cases also use
1507 * LL_MAX_HEADER instead to allocate the skb
1509 * interface address info:
1511 * @perm_addr: Permanent hw address
1512 * @addr_assign_type: Hw address assignment type
1513 * @addr_len: Hardware address length
1514 * @neigh_priv_len: Used in neigh_alloc()
1515 * @dev_id: Used to differentiate devices that share
1516 * the same link layer address
1517 * @dev_port: Used to differentiate devices that share
1519 * @addr_list_lock: XXX: need comments on this one
1520 * @uc_promisc: Counter that indicates promiscuous mode
1521 * has been enabled due to the need to listen to
1522 * additional unicast addresses in a device that
1523 * does not implement ndo_set_rx_mode()
1524 * @uc: unicast mac addresses
1525 * @mc: multicast mac addresses
1526 * @dev_addrs: list of device hw addresses
1527 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1528 * @promiscuity: Number of times the NIC is told to work in
1529 * promiscuous mode; if it becomes 0 the NIC will
1530 * exit promiscuous mode
1531 * @allmulti: Counter, enables or disables allmulticast mode
1533 * @vlan_info: VLAN info
1534 * @dsa_ptr: dsa specific data
1535 * @tipc_ptr: TIPC specific data
1536 * @atalk_ptr: AppleTalk link
1537 * @ip_ptr: IPv4 specific data
1538 * @dn_ptr: DECnet specific data
1539 * @ip6_ptr: IPv6 specific data
1540 * @ax25_ptr: AX.25 specific data
1541 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1543 * @dev_addr: Hw address (before bcast,
1544 * because most packets are unicast)
1546 * @_rx: Array of RX queues
1547 * @num_rx_queues: Number of RX queues
1548 * allocated at register_netdev() time
1549 * @real_num_rx_queues: Number of RX queues currently active in device
1551 * @rx_handler: handler for received packets
1552 * @rx_handler_data: XXX: need comments on this one
1553 * @ingress_queue: XXX: need comments on this one
1554 * @broadcast: hw bcast address
1556 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1557 * indexed by RX queue number. Assigned by driver.
1558 * This must only be set if the ndo_rx_flow_steer
1559 * operation is defined
1560 * @index_hlist: Device index hash chain
1562 * @_tx: Array of TX queues
1563 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1564 * @real_num_tx_queues: Number of TX queues currently active in device
1565 * @qdisc: Root qdisc from userspace point of view
1566 * @tx_queue_len: Max frames per queue allowed
1567 * @tx_global_lock: XXX: need comments on this one
1569 * @xps_maps: XXX: need comments on this one
1571 * @watchdog_timeo: Represents the timeout that is used by
1572 * the watchdog (see dev_watchdog())
1573 * @watchdog_timer: List of timers
1575 * @pcpu_refcnt: Number of references to this device
1576 * @todo_list: Delayed register/unregister
1577 * @link_watch_list: XXX: need comments on this one
1579 * @reg_state: Register/unregister state machine
1580 * @dismantle: Device is going to be freed
1581 * @rtnl_link_state: This enum represents the phases of creating
1584 * @destructor: Called from unregister,
1585 * can be used to call free_netdev
1586 * @npinfo: XXX: need comments on this one
1587 * @nd_net: Network namespace this network device is inside
1589 * @ml_priv: Mid-layer private
1590 * @lstats: Loopback statistics
1591 * @tstats: Tunnel statistics
1592 * @dstats: Dummy statistics
1593 * @vstats: Virtual ethernet statistics
1598 * @dev: Class/net/name entry
1599 * @sysfs_groups: Space for optional device, statistics and wireless
1602 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1603 * @rtnl_link_ops: Rtnl_link_ops
1605 * @gso_max_size: Maximum size of generic segmentation offload
1606 * @gso_max_segs: Maximum number of segments that can be passed to the
1609 * @dcbnl_ops: Data Center Bridging netlink ops
1610 * @num_tc: Number of traffic classes in the net device
1611 * @tc_to_txq: XXX: need comments on this one
1612 * @prio_tc_map: XXX: need comments on this one
1614 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1616 * @priomap: XXX: need comments on this one
1617 * @phydev: Physical device may attach itself
1618 * for hardware timestamping
1620 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1621 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1623 * @proto_down: protocol port state information can be sent to the
1624 * switch driver and used to set the phys state of the
1627 * FIXME: cleanup struct net_device such that network protocol info
1632 char name[IFNAMSIZ];
1633 struct hlist_node name_hlist;
1636 * I/O specific fields
1637 * FIXME: Merge these and struct ifmap into one
1639 unsigned long mem_end;
1640 unsigned long mem_start;
1641 unsigned long base_addr;
1644 atomic_t carrier_changes;
1647 * Some hardware also needs these fields (state,dev_list,
1648 * napi_list,unreg_list,close_list) but they are not
1649 * part of the usual set specified in Space.c.
1652 unsigned long state;
1654 struct list_head dev_list;
1655 struct list_head napi_list;
1656 struct list_head unreg_list;
1657 struct list_head close_list;
1658 struct list_head ptype_all;
1659 struct list_head ptype_specific;
1662 struct list_head upper;
1663 struct list_head lower;
1666 netdev_features_t features;
1667 netdev_features_t hw_features;
1668 netdev_features_t wanted_features;
1669 netdev_features_t vlan_features;
1670 netdev_features_t hw_enc_features;
1671 netdev_features_t mpls_features;
1672 netdev_features_t gso_partial_features;
1677 struct net_device_stats stats;
1679 atomic_long_t rx_dropped;
1680 atomic_long_t tx_dropped;
1681 atomic_long_t rx_nohandler;
1683 #ifdef CONFIG_WIRELESS_EXT
1684 const struct iw_handler_def *wireless_handlers;
1685 struct iw_public_data *wireless_data;
1687 const struct net_device_ops *netdev_ops;
1688 const struct ethtool_ops *ethtool_ops;
1689 #ifdef CONFIG_NET_SWITCHDEV
1690 const struct switchdev_ops *switchdev_ops;
1692 #ifdef CONFIG_NET_L3_MASTER_DEV
1693 const struct l3mdev_ops *l3mdev_ops;
1695 #if IS_ENABLED(CONFIG_IPV6)
1696 const struct ndisc_ops *ndisc_ops;
1699 const struct header_ops *header_ops;
1702 unsigned int priv_flags;
1704 unsigned short gflags;
1705 unsigned short padded;
1707 unsigned char operstate;
1708 unsigned char link_mode;
1710 unsigned char if_port;
1714 unsigned int min_mtu;
1715 unsigned int max_mtu;
1716 unsigned short type;
1717 unsigned short hard_header_len;
1718 unsigned short min_header_len;
1720 unsigned short needed_headroom;
1721 unsigned short needed_tailroom;
1723 /* Interface address info. */
1724 unsigned char perm_addr[MAX_ADDR_LEN];
1725 unsigned char addr_assign_type;
1726 unsigned char addr_len;
1727 unsigned short neigh_priv_len;
1728 unsigned short dev_id;
1729 unsigned short dev_port;
1730 spinlock_t addr_list_lock;
1731 unsigned char name_assign_type;
1733 struct netdev_hw_addr_list uc;
1734 struct netdev_hw_addr_list mc;
1735 struct netdev_hw_addr_list dev_addrs;
1738 struct kset *queues_kset;
1740 unsigned int promiscuity;
1741 unsigned int allmulti;
1744 /* Protocol-specific pointers */
1746 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1747 struct vlan_info __rcu *vlan_info;
1749 #if IS_ENABLED(CONFIG_NET_DSA)
1750 struct dsa_switch_tree *dsa_ptr;
1752 #if IS_ENABLED(CONFIG_TIPC)
1753 struct tipc_bearer __rcu *tipc_ptr;
1756 struct in_device __rcu *ip_ptr;
1757 struct dn_dev __rcu *dn_ptr;
1758 struct inet6_dev __rcu *ip6_ptr;
1760 struct wireless_dev *ieee80211_ptr;
1761 struct wpan_dev *ieee802154_ptr;
1762 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1763 struct mpls_dev __rcu *mpls_ptr;
1767 * Cache lines mostly used on receive path (including eth_type_trans())
1769 /* Interface address info used in eth_type_trans() */
1770 unsigned char *dev_addr;
1773 struct netdev_rx_queue *_rx;
1775 unsigned int num_rx_queues;
1776 unsigned int real_num_rx_queues;
1779 unsigned long gro_flush_timeout;
1780 rx_handler_func_t __rcu *rx_handler;
1781 void __rcu *rx_handler_data;
1783 #ifdef CONFIG_NET_CLS_ACT
1784 struct tcf_proto __rcu *ingress_cl_list;
1786 struct netdev_queue __rcu *ingress_queue;
1787 #ifdef CONFIG_NETFILTER_INGRESS
1788 struct nf_hook_entry __rcu *nf_hooks_ingress;
1791 unsigned char broadcast[MAX_ADDR_LEN];
1792 #ifdef CONFIG_RFS_ACCEL
1793 struct cpu_rmap *rx_cpu_rmap;
1795 struct hlist_node index_hlist;
1798 * Cache lines mostly used on transmit path
1800 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1801 unsigned int num_tx_queues;
1802 unsigned int real_num_tx_queues;
1803 struct Qdisc *qdisc;
1804 #ifdef CONFIG_NET_SCHED
1805 DECLARE_HASHTABLE (qdisc_hash, 4);
1807 unsigned long tx_queue_len;
1808 spinlock_t tx_global_lock;
1812 struct xps_dev_maps __rcu *xps_maps;
1814 #ifdef CONFIG_NET_CLS_ACT
1815 struct tcf_proto __rcu *egress_cl_list;
1818 /* These may be needed for future network-power-down code. */
1819 struct timer_list watchdog_timer;
1821 int __percpu *pcpu_refcnt;
1822 struct list_head todo_list;
1824 struct list_head link_watch_list;
1826 enum { NETREG_UNINITIALIZED=0,
1827 NETREG_REGISTERED, /* completed register_netdevice */
1828 NETREG_UNREGISTERING, /* called unregister_netdevice */
1829 NETREG_UNREGISTERED, /* completed unregister todo */
1830 NETREG_RELEASED, /* called free_netdev */
1831 NETREG_DUMMY, /* dummy device for NAPI poll */
1837 RTNL_LINK_INITIALIZED,
1838 RTNL_LINK_INITIALIZING,
1839 } rtnl_link_state:16;
1841 void (*destructor)(struct net_device *dev);
1843 #ifdef CONFIG_NETPOLL
1844 struct netpoll_info __rcu *npinfo;
1847 possible_net_t nd_net;
1849 /* mid-layer private */
1852 struct pcpu_lstats __percpu *lstats;
1853 struct pcpu_sw_netstats __percpu *tstats;
1854 struct pcpu_dstats __percpu *dstats;
1855 struct pcpu_vstats __percpu *vstats;
1858 #if IS_ENABLED(CONFIG_GARP)
1859 struct garp_port __rcu *garp_port;
1861 #if IS_ENABLED(CONFIG_MRP)
1862 struct mrp_port __rcu *mrp_port;
1866 const struct attribute_group *sysfs_groups[4];
1867 const struct attribute_group *sysfs_rx_queue_group;
1869 const struct rtnl_link_ops *rtnl_link_ops;
1871 /* for setting kernel sock attribute on TCP connection setup */
1872 #define GSO_MAX_SIZE 65536
1873 unsigned int gso_max_size;
1874 #define GSO_MAX_SEGS 65535
1878 const struct dcbnl_rtnl_ops *dcbnl_ops;
1881 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1882 u8 prio_tc_map[TC_BITMASK + 1];
1884 #if IS_ENABLED(CONFIG_FCOE)
1885 unsigned int fcoe_ddp_xid;
1887 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1888 struct netprio_map __rcu *priomap;
1890 struct phy_device *phydev;
1891 struct lock_class_key *qdisc_tx_busylock;
1892 struct lock_class_key *qdisc_running_key;
1895 #define to_net_dev(d) container_of(d, struct net_device, dev)
1897 #define NETDEV_ALIGN 32
1900 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1902 return dev->prio_tc_map[prio & TC_BITMASK];
1906 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1908 if (tc >= dev->num_tc)
1911 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1915 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
1916 void netdev_reset_tc(struct net_device *dev);
1917 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
1918 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
1921 int netdev_get_num_tc(struct net_device *dev)
1927 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1930 return &dev->_tx[index];
1933 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
1934 const struct sk_buff *skb)
1936 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
1939 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1940 void (*f)(struct net_device *,
1941 struct netdev_queue *,
1947 for (i = 0; i < dev->num_tx_queues; i++)
1948 f(dev, &dev->_tx[i], arg);
1951 #define netdev_lockdep_set_classes(dev) \
1953 static struct lock_class_key qdisc_tx_busylock_key; \
1954 static struct lock_class_key qdisc_running_key; \
1955 static struct lock_class_key qdisc_xmit_lock_key; \
1956 static struct lock_class_key dev_addr_list_lock_key; \
1959 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
1960 (dev)->qdisc_running_key = &qdisc_running_key; \
1961 lockdep_set_class(&(dev)->addr_list_lock, \
1962 &dev_addr_list_lock_key); \
1963 for (i = 0; i < (dev)->num_tx_queues; i++) \
1964 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
1965 &qdisc_xmit_lock_key); \
1968 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1969 struct sk_buff *skb,
1972 /* returns the headroom that the master device needs to take in account
1973 * when forwarding to this dev
1975 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
1977 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
1980 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
1982 if (dev->netdev_ops->ndo_set_rx_headroom)
1983 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
1986 /* set the device rx headroom to the dev's default */
1987 static inline void netdev_reset_rx_headroom(struct net_device *dev)
1989 netdev_set_rx_headroom(dev, -1);
1993 * Net namespace inlines
1996 struct net *dev_net(const struct net_device *dev)
1998 return read_pnet(&dev->nd_net);
2002 void dev_net_set(struct net_device *dev, struct net *net)
2004 write_pnet(&dev->nd_net, net);
2007 static inline bool netdev_uses_dsa(struct net_device *dev)
2009 #if IS_ENABLED(CONFIG_NET_DSA)
2010 if (dev->dsa_ptr != NULL)
2011 return dsa_uses_tagged_protocol(dev->dsa_ptr);
2017 * netdev_priv - access network device private data
2018 * @dev: network device
2020 * Get network device private data
2022 static inline void *netdev_priv(const struct net_device *dev)
2024 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2027 /* Set the sysfs physical device reference for the network logical device
2028 * if set prior to registration will cause a symlink during initialization.
2030 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2032 /* Set the sysfs device type for the network logical device to allow
2033 * fine-grained identification of different network device types. For
2034 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2036 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2038 /* Default NAPI poll() weight
2039 * Device drivers are strongly advised to not use bigger value
2041 #define NAPI_POLL_WEIGHT 64
2044 * netif_napi_add - initialize a NAPI context
2045 * @dev: network device
2046 * @napi: NAPI context
2047 * @poll: polling function
2048 * @weight: default weight
2050 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2051 * *any* of the other NAPI-related functions.
2053 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2054 int (*poll)(struct napi_struct *, int), int weight);
2057 * netif_tx_napi_add - initialize a NAPI context
2058 * @dev: network device
2059 * @napi: NAPI context
2060 * @poll: polling function
2061 * @weight: default weight
2063 * This variant of netif_napi_add() should be used from drivers using NAPI
2064 * to exclusively poll a TX queue.
2065 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2067 static inline void netif_tx_napi_add(struct net_device *dev,
2068 struct napi_struct *napi,
2069 int (*poll)(struct napi_struct *, int),
2072 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2073 netif_napi_add(dev, napi, poll, weight);
2077 * netif_napi_del - remove a NAPI context
2078 * @napi: NAPI context
2080 * netif_napi_del() removes a NAPI context from the network device NAPI list
2082 void netif_napi_del(struct napi_struct *napi);
2084 struct napi_gro_cb {
2085 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2088 /* Length of frag0. */
2089 unsigned int frag0_len;
2091 /* This indicates where we are processing relative to skb->data. */
2094 /* This is non-zero if the packet cannot be merged with the new skb. */
2097 /* Save the IP ID here and check when we get to the transport layer */
2100 /* Number of segments aggregated. */
2103 /* Start offset for remote checksum offload */
2104 u16 gro_remcsum_start;
2106 /* jiffies when first packet was created/queued */
2109 /* Used in ipv6_gro_receive() and foo-over-udp */
2112 /* This is non-zero if the packet may be of the same flow. */
2115 /* Used in tunnel GRO receive */
2118 /* GRO checksum is valid */
2121 /* Number of checksums via CHECKSUM_UNNECESSARY */
2126 #define NAPI_GRO_FREE 1
2127 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2129 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2132 /* Used in GRE, set in fou/gue_gro_receive */
2135 /* Used to determine if flush_id can be ignored */
2138 /* Number of gro_receive callbacks this packet already went through */
2139 u8 recursion_counter:4;
2143 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2146 /* used in skb_gro_receive() slow path */
2147 struct sk_buff *last;
2150 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2152 #define GRO_RECURSION_LIMIT 15
2153 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2155 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2158 typedef struct sk_buff **(*gro_receive_t)(struct sk_buff **, struct sk_buff *);
2159 static inline struct sk_buff **call_gro_receive(gro_receive_t cb,
2160 struct sk_buff **head,
2161 struct sk_buff *skb)
2163 if (unlikely(gro_recursion_inc_test(skb))) {
2164 NAPI_GRO_CB(skb)->flush |= 1;
2168 return cb(head, skb);
2171 typedef struct sk_buff **(*gro_receive_sk_t)(struct sock *, struct sk_buff **,
2173 static inline struct sk_buff **call_gro_receive_sk(gro_receive_sk_t cb,
2175 struct sk_buff **head,
2176 struct sk_buff *skb)
2178 if (unlikely(gro_recursion_inc_test(skb))) {
2179 NAPI_GRO_CB(skb)->flush |= 1;
2183 return cb(sk, head, skb);
2186 struct packet_type {
2187 __be16 type; /* This is really htons(ether_type). */
2188 struct net_device *dev; /* NULL is wildcarded here */
2189 int (*func) (struct sk_buff *,
2190 struct net_device *,
2191 struct packet_type *,
2192 struct net_device *);
2193 bool (*id_match)(struct packet_type *ptype,
2195 void *af_packet_priv;
2196 struct list_head list;
2199 struct offload_callbacks {
2200 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2201 netdev_features_t features);
2202 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2203 struct sk_buff *skb);
2204 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2207 struct packet_offload {
2208 __be16 type; /* This is really htons(ether_type). */
2210 struct offload_callbacks callbacks;
2211 struct list_head list;
2214 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2215 struct pcpu_sw_netstats {
2220 struct u64_stats_sync syncp;
2223 #define __netdev_alloc_pcpu_stats(type, gfp) \
2225 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2228 for_each_possible_cpu(__cpu) { \
2229 typeof(type) *stat; \
2230 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2231 u64_stats_init(&stat->syncp); \
2237 #define netdev_alloc_pcpu_stats(type) \
2238 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2240 enum netdev_lag_tx_type {
2241 NETDEV_LAG_TX_TYPE_UNKNOWN,
2242 NETDEV_LAG_TX_TYPE_RANDOM,
2243 NETDEV_LAG_TX_TYPE_BROADCAST,
2244 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2245 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2246 NETDEV_LAG_TX_TYPE_HASH,
2249 struct netdev_lag_upper_info {
2250 enum netdev_lag_tx_type tx_type;
2253 struct netdev_lag_lower_state_info {
2258 #include <linux/notifier.h>
2260 /* netdevice notifier chain. Please remember to update the rtnetlink
2261 * notification exclusion list in rtnetlink_event() when adding new
2264 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2265 #define NETDEV_DOWN 0x0002
2266 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2267 detected a hardware crash and restarted
2268 - we can use this eg to kick tcp sessions
2270 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2271 #define NETDEV_REGISTER 0x0005
2272 #define NETDEV_UNREGISTER 0x0006
2273 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2274 #define NETDEV_CHANGEADDR 0x0008
2275 #define NETDEV_GOING_DOWN 0x0009
2276 #define NETDEV_CHANGENAME 0x000A
2277 #define NETDEV_FEAT_CHANGE 0x000B
2278 #define NETDEV_BONDING_FAILOVER 0x000C
2279 #define NETDEV_PRE_UP 0x000D
2280 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2281 #define NETDEV_POST_TYPE_CHANGE 0x000F
2282 #define NETDEV_POST_INIT 0x0010
2283 #define NETDEV_UNREGISTER_FINAL 0x0011
2284 #define NETDEV_RELEASE 0x0012
2285 #define NETDEV_NOTIFY_PEERS 0x0013
2286 #define NETDEV_JOIN 0x0014
2287 #define NETDEV_CHANGEUPPER 0x0015
2288 #define NETDEV_RESEND_IGMP 0x0016
2289 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2290 #define NETDEV_CHANGEINFODATA 0x0018
2291 #define NETDEV_BONDING_INFO 0x0019
2292 #define NETDEV_PRECHANGEUPPER 0x001A
2293 #define NETDEV_CHANGELOWERSTATE 0x001B
2294 #define NETDEV_UDP_TUNNEL_PUSH_INFO 0x001C
2295 #define NETDEV_CHANGE_TX_QUEUE_LEN 0x001E
2297 int register_netdevice_notifier(struct notifier_block *nb);
2298 int unregister_netdevice_notifier(struct notifier_block *nb);
2300 struct netdev_notifier_info {
2301 struct net_device *dev;
2304 struct netdev_notifier_change_info {
2305 struct netdev_notifier_info info; /* must be first */
2306 unsigned int flags_changed;
2309 struct netdev_notifier_changeupper_info {
2310 struct netdev_notifier_info info; /* must be first */
2311 struct net_device *upper_dev; /* new upper dev */
2312 bool master; /* is upper dev master */
2313 bool linking; /* is the notification for link or unlink */
2314 void *upper_info; /* upper dev info */
2317 struct netdev_notifier_changelowerstate_info {
2318 struct netdev_notifier_info info; /* must be first */
2319 void *lower_state_info; /* is lower dev state */
2322 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2323 struct net_device *dev)
2328 static inline struct net_device *
2329 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2334 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2337 extern rwlock_t dev_base_lock; /* Device list lock */
2339 #define for_each_netdev(net, d) \
2340 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2341 #define for_each_netdev_reverse(net, d) \
2342 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2343 #define for_each_netdev_rcu(net, d) \
2344 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2345 #define for_each_netdev_safe(net, d, n) \
2346 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2347 #define for_each_netdev_continue(net, d) \
2348 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2349 #define for_each_netdev_continue_rcu(net, d) \
2350 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2351 #define for_each_netdev_in_bond_rcu(bond, slave) \
2352 for_each_netdev_rcu(&init_net, slave) \
2353 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2354 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2356 static inline struct net_device *next_net_device(struct net_device *dev)
2358 struct list_head *lh;
2362 lh = dev->dev_list.next;
2363 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2366 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2368 struct list_head *lh;
2372 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2373 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2376 static inline struct net_device *first_net_device(struct net *net)
2378 return list_empty(&net->dev_base_head) ? NULL :
2379 net_device_entry(net->dev_base_head.next);
2382 static inline struct net_device *first_net_device_rcu(struct net *net)
2384 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2386 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2389 int netdev_boot_setup_check(struct net_device *dev);
2390 unsigned long netdev_boot_base(const char *prefix, int unit);
2391 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2392 const char *hwaddr);
2393 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2394 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2395 void dev_add_pack(struct packet_type *pt);
2396 void dev_remove_pack(struct packet_type *pt);
2397 void __dev_remove_pack(struct packet_type *pt);
2398 void dev_add_offload(struct packet_offload *po);
2399 void dev_remove_offload(struct packet_offload *po);
2401 int dev_get_iflink(const struct net_device *dev);
2402 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2403 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2404 unsigned short mask);
2405 struct net_device *dev_get_by_name(struct net *net, const char *name);
2406 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2407 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2408 int dev_alloc_name(struct net_device *dev, const char *name);
2409 int dev_open(struct net_device *dev);
2410 int dev_close(struct net_device *dev);
2411 int dev_close_many(struct list_head *head, bool unlink);
2412 void dev_disable_lro(struct net_device *dev);
2413 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2414 int dev_queue_xmit(struct sk_buff *skb);
2415 int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2416 int register_netdevice(struct net_device *dev);
2417 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2418 void unregister_netdevice_many(struct list_head *head);
2419 static inline void unregister_netdevice(struct net_device *dev)
2421 unregister_netdevice_queue(dev, NULL);
2424 int netdev_refcnt_read(const struct net_device *dev);
2425 void free_netdev(struct net_device *dev);
2426 void netdev_freemem(struct net_device *dev);
2427 void synchronize_net(void);
2428 int init_dummy_netdev(struct net_device *dev);
2430 DECLARE_PER_CPU(int, xmit_recursion);
2431 #define XMIT_RECURSION_LIMIT 10
2433 static inline int dev_recursion_level(void)
2435 return this_cpu_read(xmit_recursion);
2438 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2439 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2440 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2441 int netdev_get_name(struct net *net, char *name, int ifindex);
2442 int dev_restart(struct net_device *dev);
2443 int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2445 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2447 return NAPI_GRO_CB(skb)->data_offset;
2450 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2452 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2455 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2457 NAPI_GRO_CB(skb)->data_offset += len;
2460 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2461 unsigned int offset)
2463 return NAPI_GRO_CB(skb)->frag0 + offset;
2466 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2468 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2471 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2473 NAPI_GRO_CB(skb)->frag0 = NULL;
2474 NAPI_GRO_CB(skb)->frag0_len = 0;
2477 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2478 unsigned int offset)
2480 if (!pskb_may_pull(skb, hlen))
2483 skb_gro_frag0_invalidate(skb);
2484 return skb->data + offset;
2487 static inline void *skb_gro_network_header(struct sk_buff *skb)
2489 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2490 skb_network_offset(skb);
2493 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2494 const void *start, unsigned int len)
2496 if (NAPI_GRO_CB(skb)->csum_valid)
2497 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2498 csum_partial(start, len, 0));
2501 /* GRO checksum functions. These are logical equivalents of the normal
2502 * checksum functions (in skbuff.h) except that they operate on the GRO
2503 * offsets and fields in sk_buff.
2506 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2508 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2510 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2513 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2517 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2518 skb_checksum_start_offset(skb) <
2519 skb_gro_offset(skb)) &&
2520 !skb_at_gro_remcsum_start(skb) &&
2521 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2522 (!zero_okay || check));
2525 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2528 if (NAPI_GRO_CB(skb)->csum_valid &&
2529 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2532 NAPI_GRO_CB(skb)->csum = psum;
2534 return __skb_gro_checksum_complete(skb);
2537 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2539 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2540 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2541 NAPI_GRO_CB(skb)->csum_cnt--;
2543 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2544 * verified a new top level checksum or an encapsulated one
2545 * during GRO. This saves work if we fallback to normal path.
2547 __skb_incr_checksum_unnecessary(skb);
2551 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2554 __sum16 __ret = 0; \
2555 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2556 __ret = __skb_gro_checksum_validate_complete(skb, \
2557 compute_pseudo(skb, proto)); \
2559 __skb_mark_checksum_bad(skb); \
2561 skb_gro_incr_csum_unnecessary(skb); \
2565 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2566 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2568 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2570 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2572 #define skb_gro_checksum_simple_validate(skb) \
2573 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2575 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2577 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2578 !NAPI_GRO_CB(skb)->csum_valid);
2581 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2582 __sum16 check, __wsum pseudo)
2584 NAPI_GRO_CB(skb)->csum = ~pseudo;
2585 NAPI_GRO_CB(skb)->csum_valid = 1;
2588 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2590 if (__skb_gro_checksum_convert_check(skb)) \
2591 __skb_gro_checksum_convert(skb, check, \
2592 compute_pseudo(skb, proto)); \
2595 struct gro_remcsum {
2600 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2606 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2607 unsigned int off, size_t hdrlen,
2608 int start, int offset,
2609 struct gro_remcsum *grc,
2613 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2615 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2618 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2622 ptr = skb_gro_header_fast(skb, off);
2623 if (skb_gro_header_hard(skb, off + plen)) {
2624 ptr = skb_gro_header_slow(skb, off + plen, off);
2629 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2632 /* Adjust skb->csum since we changed the packet */
2633 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2635 grc->offset = off + hdrlen + offset;
2641 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2642 struct gro_remcsum *grc)
2645 size_t plen = grc->offset + sizeof(u16);
2650 ptr = skb_gro_header_fast(skb, grc->offset);
2651 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2652 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2657 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2660 #ifdef CONFIG_XFRM_OFFLOAD
2661 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush)
2663 if (PTR_ERR(pp) != -EINPROGRESS)
2664 NAPI_GRO_CB(skb)->flush |= flush;
2667 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush)
2669 NAPI_GRO_CB(skb)->flush |= flush;
2673 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2674 unsigned short type,
2675 const void *daddr, const void *saddr,
2678 if (!dev->header_ops || !dev->header_ops->create)
2681 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2684 static inline int dev_parse_header(const struct sk_buff *skb,
2685 unsigned char *haddr)
2687 const struct net_device *dev = skb->dev;
2689 if (!dev->header_ops || !dev->header_ops->parse)
2691 return dev->header_ops->parse(skb, haddr);
2694 /* ll_header must have at least hard_header_len allocated */
2695 static inline bool dev_validate_header(const struct net_device *dev,
2696 char *ll_header, int len)
2698 if (likely(len >= dev->hard_header_len))
2700 if (len < dev->min_header_len)
2703 if (capable(CAP_SYS_RAWIO)) {
2704 memset(ll_header + len, 0, dev->hard_header_len - len);
2708 if (dev->header_ops && dev->header_ops->validate)
2709 return dev->header_ops->validate(ll_header, len);
2714 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2715 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2716 static inline int unregister_gifconf(unsigned int family)
2718 return register_gifconf(family, NULL);
2721 #ifdef CONFIG_NET_FLOW_LIMIT
2722 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2723 struct sd_flow_limit {
2725 unsigned int num_buckets;
2726 unsigned int history_head;
2727 u16 history[FLOW_LIMIT_HISTORY];
2731 extern int netdev_flow_limit_table_len;
2732 #endif /* CONFIG_NET_FLOW_LIMIT */
2735 * Incoming packets are placed on per-CPU queues
2737 struct softnet_data {
2738 struct list_head poll_list;
2739 struct sk_buff_head process_queue;
2742 unsigned int processed;
2743 unsigned int time_squeeze;
2744 unsigned int received_rps;
2746 struct softnet_data *rps_ipi_list;
2748 #ifdef CONFIG_NET_FLOW_LIMIT
2749 struct sd_flow_limit __rcu *flow_limit;
2751 struct Qdisc *output_queue;
2752 struct Qdisc **output_queue_tailp;
2753 struct sk_buff *completion_queue;
2756 /* input_queue_head should be written by cpu owning this struct,
2757 * and only read by other cpus. Worth using a cache line.
2759 unsigned int input_queue_head ____cacheline_aligned_in_smp;
2761 /* Elements below can be accessed between CPUs for RPS/RFS */
2762 struct call_single_data csd ____cacheline_aligned_in_smp;
2763 struct softnet_data *rps_ipi_next;
2765 unsigned int input_queue_tail;
2767 unsigned int dropped;
2768 struct sk_buff_head input_pkt_queue;
2769 struct napi_struct backlog;
2773 static inline void input_queue_head_incr(struct softnet_data *sd)
2776 sd->input_queue_head++;
2780 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2781 unsigned int *qtail)
2784 *qtail = ++sd->input_queue_tail;
2788 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2790 void __netif_schedule(struct Qdisc *q);
2791 void netif_schedule_queue(struct netdev_queue *txq);
2793 static inline void netif_tx_schedule_all(struct net_device *dev)
2797 for (i = 0; i < dev->num_tx_queues; i++)
2798 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2801 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2803 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2807 * netif_start_queue - allow transmit
2808 * @dev: network device
2810 * Allow upper layers to call the device hard_start_xmit routine.
2812 static inline void netif_start_queue(struct net_device *dev)
2814 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2817 static inline void netif_tx_start_all_queues(struct net_device *dev)
2821 for (i = 0; i < dev->num_tx_queues; i++) {
2822 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2823 netif_tx_start_queue(txq);
2827 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2830 * netif_wake_queue - restart transmit
2831 * @dev: network device
2833 * Allow upper layers to call the device hard_start_xmit routine.
2834 * Used for flow control when transmit resources are available.
2836 static inline void netif_wake_queue(struct net_device *dev)
2838 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2841 static inline void netif_tx_wake_all_queues(struct net_device *dev)
2845 for (i = 0; i < dev->num_tx_queues; i++) {
2846 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2847 netif_tx_wake_queue(txq);
2851 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2853 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2857 * netif_stop_queue - stop transmitted packets
2858 * @dev: network device
2860 * Stop upper layers calling the device hard_start_xmit routine.
2861 * Used for flow control when transmit resources are unavailable.
2863 static inline void netif_stop_queue(struct net_device *dev)
2865 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2868 void netif_tx_stop_all_queues(struct net_device *dev);
2870 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2872 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2876 * netif_queue_stopped - test if transmit queue is flowblocked
2877 * @dev: network device
2879 * Test if transmit queue on device is currently unable to send.
2881 static inline bool netif_queue_stopped(const struct net_device *dev)
2883 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2886 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2888 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2892 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2894 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2898 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2900 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2904 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2905 * @dev_queue: pointer to transmit queue
2907 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2908 * to give appropriate hint to the CPU.
2910 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2913 prefetchw(&dev_queue->dql.num_queued);
2918 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2919 * @dev_queue: pointer to transmit queue
2921 * BQL enabled drivers might use this helper in their TX completion path,
2922 * to give appropriate hint to the CPU.
2924 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
2927 prefetchw(&dev_queue->dql.limit);
2931 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2935 dql_queued(&dev_queue->dql, bytes);
2937 if (likely(dql_avail(&dev_queue->dql) >= 0))
2940 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2943 * The XOFF flag must be set before checking the dql_avail below,
2944 * because in netdev_tx_completed_queue we update the dql_completed
2945 * before checking the XOFF flag.
2949 /* check again in case another CPU has just made room avail */
2950 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2951 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2956 * netdev_sent_queue - report the number of bytes queued to hardware
2957 * @dev: network device
2958 * @bytes: number of bytes queued to the hardware device queue
2960 * Report the number of bytes queued for sending/completion to the network
2961 * device hardware queue. @bytes should be a good approximation and should
2962 * exactly match netdev_completed_queue() @bytes
2964 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2966 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2969 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2970 unsigned int pkts, unsigned int bytes)
2973 if (unlikely(!bytes))
2976 dql_completed(&dev_queue->dql, bytes);
2979 * Without the memory barrier there is a small possiblity that
2980 * netdev_tx_sent_queue will miss the update and cause the queue to
2981 * be stopped forever
2985 if (dql_avail(&dev_queue->dql) < 0)
2988 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2989 netif_schedule_queue(dev_queue);
2994 * netdev_completed_queue - report bytes and packets completed by device
2995 * @dev: network device
2996 * @pkts: actual number of packets sent over the medium
2997 * @bytes: actual number of bytes sent over the medium
2999 * Report the number of bytes and packets transmitted by the network device
3000 * hardware queue over the physical medium, @bytes must exactly match the
3001 * @bytes amount passed to netdev_sent_queue()
3003 static inline void netdev_completed_queue(struct net_device *dev,
3004 unsigned int pkts, unsigned int bytes)
3006 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3009 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3012 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3018 * netdev_reset_queue - reset the packets and bytes count of a network device
3019 * @dev_queue: network device
3021 * Reset the bytes and packet count of a network device and clear the
3022 * software flow control OFF bit for this network device
3024 static inline void netdev_reset_queue(struct net_device *dev_queue)
3026 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3030 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3031 * @dev: network device
3032 * @queue_index: given tx queue index
3034 * Returns 0 if given tx queue index >= number of device tx queues,
3035 * otherwise returns the originally passed tx queue index.
3037 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3039 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3040 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3041 dev->name, queue_index,
3042 dev->real_num_tx_queues);
3050 * netif_running - test if up
3051 * @dev: network device
3053 * Test if the device has been brought up.
3055 static inline bool netif_running(const struct net_device *dev)
3057 return test_bit(__LINK_STATE_START, &dev->state);
3061 * Routines to manage the subqueues on a device. We only need start,
3062 * stop, and a check if it's stopped. All other device management is
3063 * done at the overall netdevice level.
3064 * Also test the device if we're multiqueue.
3068 * netif_start_subqueue - allow sending packets on subqueue
3069 * @dev: network device
3070 * @queue_index: sub queue index
3072 * Start individual transmit queue of a device with multiple transmit queues.
3074 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3076 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3078 netif_tx_start_queue(txq);
3082 * netif_stop_subqueue - stop sending packets on subqueue
3083 * @dev: network device
3084 * @queue_index: sub queue index
3086 * Stop individual transmit queue of a device with multiple transmit queues.
3088 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3090 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3091 netif_tx_stop_queue(txq);
3095 * netif_subqueue_stopped - test status of subqueue
3096 * @dev: network device
3097 * @queue_index: sub queue index
3099 * Check individual transmit queue of a device with multiple transmit queues.
3101 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3104 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3106 return netif_tx_queue_stopped(txq);
3109 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3110 struct sk_buff *skb)
3112 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3116 * netif_wake_subqueue - allow sending packets on subqueue
3117 * @dev: network device
3118 * @queue_index: sub queue index
3120 * Resume individual transmit queue of a device with multiple transmit queues.
3122 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3124 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3126 netif_tx_wake_queue(txq);
3130 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3133 static inline int netif_set_xps_queue(struct net_device *dev,
3134 const struct cpumask *mask,
3141 u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
3142 unsigned int num_tx_queues);
3145 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
3146 * as a distribution range limit for the returned value.
3148 static inline u16 skb_tx_hash(const struct net_device *dev,
3149 struct sk_buff *skb)
3151 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
3155 * netif_is_multiqueue - test if device has multiple transmit queues
3156 * @dev: network device
3158 * Check if device has multiple transmit queues
3160 static inline bool netif_is_multiqueue(const struct net_device *dev)
3162 return dev->num_tx_queues > 1;
3165 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3168 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3170 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3178 static inline unsigned int get_netdev_rx_queue_index(
3179 struct netdev_rx_queue *queue)
3181 struct net_device *dev = queue->dev;
3182 int index = queue - dev->_rx;
3184 BUG_ON(index >= dev->num_rx_queues);
3189 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3190 int netif_get_num_default_rss_queues(void);
3192 enum skb_free_reason {
3193 SKB_REASON_CONSUMED,
3197 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3198 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3201 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3202 * interrupt context or with hardware interrupts being disabled.
3203 * (in_irq() || irqs_disabled())
3205 * We provide four helpers that can be used in following contexts :
3207 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3208 * replacing kfree_skb(skb)
3210 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3211 * Typically used in place of consume_skb(skb) in TX completion path
3213 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3214 * replacing kfree_skb(skb)
3216 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3217 * and consumed a packet. Used in place of consume_skb(skb)
3219 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3221 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3224 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3226 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3229 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3231 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3234 static inline void dev_consume_skb_any(struct sk_buff *skb)
3236 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3239 int netif_rx(struct sk_buff *skb);
3240 int netif_rx_ni(struct sk_buff *skb);
3241 int netif_receive_skb(struct sk_buff *skb);
3242 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3243 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3244 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3245 gro_result_t napi_gro_frags(struct napi_struct *napi);
3246 struct packet_offload *gro_find_receive_by_type(__be16 type);
3247 struct packet_offload *gro_find_complete_by_type(__be16 type);
3249 static inline void napi_free_frags(struct napi_struct *napi)
3251 kfree_skb(napi->skb);
3255 bool netdev_is_rx_handler_busy(struct net_device *dev);
3256 int netdev_rx_handler_register(struct net_device *dev,
3257 rx_handler_func_t *rx_handler,
3258 void *rx_handler_data);
3259 void netdev_rx_handler_unregister(struct net_device *dev);
3261 bool dev_valid_name(const char *name);
3262 int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
3263 int dev_ethtool(struct net *net, struct ifreq *);
3264 unsigned int dev_get_flags(const struct net_device *);
3265 int __dev_change_flags(struct net_device *, unsigned int flags);
3266 int dev_change_flags(struct net_device *, unsigned int);
3267 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3268 unsigned int gchanges);
3269 int dev_change_name(struct net_device *, const char *);
3270 int dev_set_alias(struct net_device *, const char *, size_t);
3271 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3272 int dev_set_mtu(struct net_device *, int);
3273 void dev_set_group(struct net_device *, int);
3274 int dev_set_mac_address(struct net_device *, struct sockaddr *);
3275 int dev_change_carrier(struct net_device *, bool new_carrier);
3276 int dev_get_phys_port_id(struct net_device *dev,
3277 struct netdev_phys_item_id *ppid);
3278 int dev_get_phys_port_name(struct net_device *dev,
3279 char *name, size_t len);
3280 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3281 int dev_change_xdp_fd(struct net_device *dev, int fd, u32 flags);
3282 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
3283 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3284 struct netdev_queue *txq, int *ret);
3285 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3286 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3287 bool is_skb_forwardable(const struct net_device *dev,
3288 const struct sk_buff *skb);
3290 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3291 struct sk_buff *skb)
3293 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3294 unlikely(!is_skb_forwardable(dev, skb))) {
3295 atomic_long_inc(&dev->rx_dropped);
3300 skb_scrub_packet(skb, true);
3305 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3307 extern int netdev_budget;
3309 /* Called by rtnetlink.c:rtnl_unlock() */
3310 void netdev_run_todo(void);
3313 * dev_put - release reference to device
3314 * @dev: network device
3316 * Release reference to device to allow it to be freed.
3318 static inline void dev_put(struct net_device *dev)
3320 this_cpu_dec(*dev->pcpu_refcnt);
3324 * dev_hold - get reference to device
3325 * @dev: network device
3327 * Hold reference to device to keep it from being freed.
3329 static inline void dev_hold(struct net_device *dev)
3331 this_cpu_inc(*dev->pcpu_refcnt);
3334 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3335 * and _off may be called from IRQ context, but it is caller
3336 * who is responsible for serialization of these calls.
3338 * The name carrier is inappropriate, these functions should really be
3339 * called netif_lowerlayer_*() because they represent the state of any
3340 * kind of lower layer not just hardware media.
3343 void linkwatch_init_dev(struct net_device *dev);
3344 void linkwatch_fire_event(struct net_device *dev);
3345 void linkwatch_forget_dev(struct net_device *dev);
3348 * netif_carrier_ok - test if carrier present
3349 * @dev: network device
3351 * Check if carrier is present on device
3353 static inline bool netif_carrier_ok(const struct net_device *dev)
3355 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3358 unsigned long dev_trans_start(struct net_device *dev);
3360 void __netdev_watchdog_up(struct net_device *dev);
3362 void netif_carrier_on(struct net_device *dev);
3364 void netif_carrier_off(struct net_device *dev);
3367 * netif_dormant_on - mark device as dormant.
3368 * @dev: network device
3370 * Mark device as dormant (as per RFC2863).
3372 * The dormant state indicates that the relevant interface is not
3373 * actually in a condition to pass packets (i.e., it is not 'up') but is
3374 * in a "pending" state, waiting for some external event. For "on-
3375 * demand" interfaces, this new state identifies the situation where the
3376 * interface is waiting for events to place it in the up state.
3378 static inline void netif_dormant_on(struct net_device *dev)
3380 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3381 linkwatch_fire_event(dev);
3385 * netif_dormant_off - set device as not dormant.
3386 * @dev: network device
3388 * Device is not in dormant state.
3390 static inline void netif_dormant_off(struct net_device *dev)
3392 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3393 linkwatch_fire_event(dev);
3397 * netif_dormant - test if carrier present
3398 * @dev: network device
3400 * Check if carrier is present on device
3402 static inline bool netif_dormant(const struct net_device *dev)
3404 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3409 * netif_oper_up - test if device is operational
3410 * @dev: network device
3412 * Check if carrier is operational
3414 static inline bool netif_oper_up(const struct net_device *dev)
3416 return (dev->operstate == IF_OPER_UP ||
3417 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3421 * netif_device_present - is device available or removed
3422 * @dev: network device
3424 * Check if device has not been removed from system.
3426 static inline bool netif_device_present(struct net_device *dev)
3428 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3431 void netif_device_detach(struct net_device *dev);
3433 void netif_device_attach(struct net_device *dev);
3436 * Network interface message level settings
3440 NETIF_MSG_DRV = 0x0001,
3441 NETIF_MSG_PROBE = 0x0002,
3442 NETIF_MSG_LINK = 0x0004,
3443 NETIF_MSG_TIMER = 0x0008,
3444 NETIF_MSG_IFDOWN = 0x0010,
3445 NETIF_MSG_IFUP = 0x0020,
3446 NETIF_MSG_RX_ERR = 0x0040,
3447 NETIF_MSG_TX_ERR = 0x0080,
3448 NETIF_MSG_TX_QUEUED = 0x0100,
3449 NETIF_MSG_INTR = 0x0200,
3450 NETIF_MSG_TX_DONE = 0x0400,
3451 NETIF_MSG_RX_STATUS = 0x0800,
3452 NETIF_MSG_PKTDATA = 0x1000,
3453 NETIF_MSG_HW = 0x2000,
3454 NETIF_MSG_WOL = 0x4000,
3457 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3458 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3459 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3460 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3461 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3462 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3463 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3464 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3465 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3466 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3467 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3468 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3469 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3470 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3471 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3473 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3476 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3477 return default_msg_enable_bits;
3478 if (debug_value == 0) /* no output */
3480 /* set low N bits */
3481 return (1 << debug_value) - 1;
3484 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3486 spin_lock(&txq->_xmit_lock);
3487 txq->xmit_lock_owner = cpu;
3490 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3492 __acquire(&txq->_xmit_lock);
3496 static inline void __netif_tx_release(struct netdev_queue *txq)
3498 __release(&txq->_xmit_lock);
3501 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3503 spin_lock_bh(&txq->_xmit_lock);
3504 txq->xmit_lock_owner = smp_processor_id();
3507 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3509 bool ok = spin_trylock(&txq->_xmit_lock);
3511 txq->xmit_lock_owner = smp_processor_id();
3515 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3517 txq->xmit_lock_owner = -1;
3518 spin_unlock(&txq->_xmit_lock);
3521 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3523 txq->xmit_lock_owner = -1;
3524 spin_unlock_bh(&txq->_xmit_lock);
3527 static inline void txq_trans_update(struct netdev_queue *txq)
3529 if (txq->xmit_lock_owner != -1)
3530 txq->trans_start = jiffies;
3533 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3534 static inline void netif_trans_update(struct net_device *dev)
3536 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3538 if (txq->trans_start != jiffies)
3539 txq->trans_start = jiffies;
3543 * netif_tx_lock - grab network device transmit lock
3544 * @dev: network device
3546 * Get network device transmit lock
3548 static inline void netif_tx_lock(struct net_device *dev)
3553 spin_lock(&dev->tx_global_lock);
3554 cpu = smp_processor_id();
3555 for (i = 0; i < dev->num_tx_queues; i++) {
3556 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3558 /* We are the only thread of execution doing a
3559 * freeze, but we have to grab the _xmit_lock in
3560 * order to synchronize with threads which are in
3561 * the ->hard_start_xmit() handler and already
3562 * checked the frozen bit.
3564 __netif_tx_lock(txq, cpu);
3565 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3566 __netif_tx_unlock(txq);
3570 static inline void netif_tx_lock_bh(struct net_device *dev)
3576 static inline void netif_tx_unlock(struct net_device *dev)
3580 for (i = 0; i < dev->num_tx_queues; i++) {
3581 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3583 /* No need to grab the _xmit_lock here. If the
3584 * queue is not stopped for another reason, we
3587 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3588 netif_schedule_queue(txq);
3590 spin_unlock(&dev->tx_global_lock);
3593 static inline void netif_tx_unlock_bh(struct net_device *dev)
3595 netif_tx_unlock(dev);
3599 #define HARD_TX_LOCK(dev, txq, cpu) { \
3600 if ((dev->features & NETIF_F_LLTX) == 0) { \
3601 __netif_tx_lock(txq, cpu); \
3603 __netif_tx_acquire(txq); \
3607 #define HARD_TX_TRYLOCK(dev, txq) \
3608 (((dev->features & NETIF_F_LLTX) == 0) ? \
3609 __netif_tx_trylock(txq) : \
3610 __netif_tx_acquire(txq))
3612 #define HARD_TX_UNLOCK(dev, txq) { \
3613 if ((dev->features & NETIF_F_LLTX) == 0) { \
3614 __netif_tx_unlock(txq); \
3616 __netif_tx_release(txq); \
3620 static inline void netif_tx_disable(struct net_device *dev)
3626 cpu = smp_processor_id();
3627 for (i = 0; i < dev->num_tx_queues; i++) {
3628 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3630 __netif_tx_lock(txq, cpu);
3631 netif_tx_stop_queue(txq);
3632 __netif_tx_unlock(txq);
3637 static inline void netif_addr_lock(struct net_device *dev)
3639 spin_lock(&dev->addr_list_lock);
3642 static inline void netif_addr_lock_nested(struct net_device *dev)
3644 int subclass = SINGLE_DEPTH_NESTING;
3646 if (dev->netdev_ops->ndo_get_lock_subclass)
3647 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3649 spin_lock_nested(&dev->addr_list_lock, subclass);
3652 static inline void netif_addr_lock_bh(struct net_device *dev)
3654 spin_lock_bh(&dev->addr_list_lock);
3657 static inline void netif_addr_unlock(struct net_device *dev)
3659 spin_unlock(&dev->addr_list_lock);
3662 static inline void netif_addr_unlock_bh(struct net_device *dev)
3664 spin_unlock_bh(&dev->addr_list_lock);
3668 * dev_addrs walker. Should be used only for read access. Call with
3669 * rcu_read_lock held.
3671 #define for_each_dev_addr(dev, ha) \
3672 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3674 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3676 void ether_setup(struct net_device *dev);
3678 /* Support for loadable net-drivers */
3679 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3680 unsigned char name_assign_type,
3681 void (*setup)(struct net_device *),
3682 unsigned int txqs, unsigned int rxqs);
3683 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3684 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3686 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3687 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3690 int register_netdev(struct net_device *dev);
3691 void unregister_netdev(struct net_device *dev);
3693 /* General hardware address lists handling functions */
3694 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3695 struct netdev_hw_addr_list *from_list, int addr_len);
3696 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3697 struct netdev_hw_addr_list *from_list, int addr_len);
3698 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3699 struct net_device *dev,
3700 int (*sync)(struct net_device *, const unsigned char *),
3701 int (*unsync)(struct net_device *,
3702 const unsigned char *));
3703 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3704 struct net_device *dev,
3705 int (*unsync)(struct net_device *,
3706 const unsigned char *));
3707 void __hw_addr_init(struct netdev_hw_addr_list *list);
3709 /* Functions used for device addresses handling */
3710 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3711 unsigned char addr_type);
3712 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3713 unsigned char addr_type);
3714 void dev_addr_flush(struct net_device *dev);
3715 int dev_addr_init(struct net_device *dev);
3717 /* Functions used for unicast addresses handling */
3718 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3719 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3720 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3721 int dev_uc_sync(struct net_device *to, struct net_device *from);
3722 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3723 void dev_uc_unsync(struct net_device *to, struct net_device *from);
3724 void dev_uc_flush(struct net_device *dev);
3725 void dev_uc_init(struct net_device *dev);
3728 * __dev_uc_sync - Synchonize device's unicast list
3729 * @dev: device to sync
3730 * @sync: function to call if address should be added
3731 * @unsync: function to call if address should be removed
3733 * Add newly added addresses to the interface, and release
3734 * addresses that have been deleted.
3736 static inline int __dev_uc_sync(struct net_device *dev,
3737 int (*sync)(struct net_device *,
3738 const unsigned char *),
3739 int (*unsync)(struct net_device *,
3740 const unsigned char *))
3742 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3746 * __dev_uc_unsync - Remove synchronized addresses from device
3747 * @dev: device to sync
3748 * @unsync: function to call if address should be removed
3750 * Remove all addresses that were added to the device by dev_uc_sync().
3752 static inline void __dev_uc_unsync(struct net_device *dev,
3753 int (*unsync)(struct net_device *,
3754 const unsigned char *))
3756 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3759 /* Functions used for multicast addresses handling */
3760 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3761 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3762 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3763 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3764 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3765 int dev_mc_sync(struct net_device *to, struct net_device *from);
3766 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3767 void dev_mc_unsync(struct net_device *to, struct net_device *from);
3768 void dev_mc_flush(struct net_device *dev);
3769 void dev_mc_init(struct net_device *dev);
3772 * __dev_mc_sync - Synchonize device's multicast list
3773 * @dev: device to sync
3774 * @sync: function to call if address should be added
3775 * @unsync: function to call if address should be removed
3777 * Add newly added addresses to the interface, and release
3778 * addresses that have been deleted.
3780 static inline int __dev_mc_sync(struct net_device *dev,
3781 int (*sync)(struct net_device *,
3782 const unsigned char *),
3783 int (*unsync)(struct net_device *,
3784 const unsigned char *))
3786 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3790 * __dev_mc_unsync - Remove synchronized addresses from device
3791 * @dev: device to sync
3792 * @unsync: function to call if address should be removed
3794 * Remove all addresses that were added to the device by dev_mc_sync().
3796 static inline void __dev_mc_unsync(struct net_device *dev,
3797 int (*unsync)(struct net_device *,
3798 const unsigned char *))
3800 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3803 /* Functions used for secondary unicast and multicast support */
3804 void dev_set_rx_mode(struct net_device *dev);
3805 void __dev_set_rx_mode(struct net_device *dev);
3806 int dev_set_promiscuity(struct net_device *dev, int inc);
3807 int dev_set_allmulti(struct net_device *dev, int inc);
3808 void netdev_state_change(struct net_device *dev);
3809 void netdev_notify_peers(struct net_device *dev);
3810 void netdev_features_change(struct net_device *dev);
3811 /* Load a device via the kmod */
3812 void dev_load(struct net *net, const char *name);
3813 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3814 struct rtnl_link_stats64 *storage);
3815 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3816 const struct net_device_stats *netdev_stats);
3818 extern int netdev_max_backlog;
3819 extern int netdev_tstamp_prequeue;
3820 extern int weight_p;
3821 extern int dev_weight_rx_bias;
3822 extern int dev_weight_tx_bias;
3823 extern int dev_rx_weight;
3824 extern int dev_tx_weight;
3826 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3827 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3828 struct list_head **iter);
3829 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3830 struct list_head **iter);
3832 /* iterate through upper list, must be called under RCU read lock */
3833 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3834 for (iter = &(dev)->adj_list.upper, \
3835 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3837 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3839 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
3840 int (*fn)(struct net_device *upper_dev,
3844 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
3845 struct net_device *upper_dev);
3847 void *netdev_lower_get_next_private(struct net_device *dev,
3848 struct list_head **iter);
3849 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3850 struct list_head **iter);
3852 #define netdev_for_each_lower_private(dev, priv, iter) \
3853 for (iter = (dev)->adj_list.lower.next, \
3854 priv = netdev_lower_get_next_private(dev, &(iter)); \
3856 priv = netdev_lower_get_next_private(dev, &(iter)))
3858 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3859 for (iter = &(dev)->adj_list.lower, \
3860 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3862 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3864 void *netdev_lower_get_next(struct net_device *dev,
3865 struct list_head **iter);
3867 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3868 for (iter = (dev)->adj_list.lower.next, \
3869 ldev = netdev_lower_get_next(dev, &(iter)); \
3871 ldev = netdev_lower_get_next(dev, &(iter)))
3873 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
3874 struct list_head **iter);
3875 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
3876 struct list_head **iter);
3878 int netdev_walk_all_lower_dev(struct net_device *dev,
3879 int (*fn)(struct net_device *lower_dev,
3882 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
3883 int (*fn)(struct net_device *lower_dev,
3887 void *netdev_adjacent_get_private(struct list_head *adj_list);
3888 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3889 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3890 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3891 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
3892 int netdev_master_upper_dev_link(struct net_device *dev,
3893 struct net_device *upper_dev,
3894 void *upper_priv, void *upper_info);
3895 void netdev_upper_dev_unlink(struct net_device *dev,
3896 struct net_device *upper_dev);
3897 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3898 void *netdev_lower_dev_get_private(struct net_device *dev,
3899 struct net_device *lower_dev);
3900 void netdev_lower_state_changed(struct net_device *lower_dev,
3901 void *lower_state_info);
3903 /* RSS keys are 40 or 52 bytes long */
3904 #define NETDEV_RSS_KEY_LEN 52
3905 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
3906 void netdev_rss_key_fill(void *buffer, size_t len);
3908 int dev_get_nest_level(struct net_device *dev);
3909 int skb_checksum_help(struct sk_buff *skb);
3910 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
3911 netdev_features_t features, bool tx_path);
3912 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
3913 netdev_features_t features);
3915 struct netdev_bonding_info {
3920 struct netdev_notifier_bonding_info {
3921 struct netdev_notifier_info info; /* must be first */
3922 struct netdev_bonding_info bonding_info;
3925 void netdev_bonding_info_change(struct net_device *dev,
3926 struct netdev_bonding_info *bonding_info);
3929 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
3931 return __skb_gso_segment(skb, features, true);
3933 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3935 static inline bool can_checksum_protocol(netdev_features_t features,
3938 if (protocol == htons(ETH_P_FCOE))
3939 return !!(features & NETIF_F_FCOE_CRC);
3941 /* Assume this is an IP checksum (not SCTP CRC) */
3943 if (features & NETIF_F_HW_CSUM) {
3944 /* Can checksum everything */
3949 case htons(ETH_P_IP):
3950 return !!(features & NETIF_F_IP_CSUM);
3951 case htons(ETH_P_IPV6):
3952 return !!(features & NETIF_F_IPV6_CSUM);
3959 void netdev_rx_csum_fault(struct net_device *dev);
3961 static inline void netdev_rx_csum_fault(struct net_device *dev)
3965 /* rx skb timestamps */
3966 void net_enable_timestamp(void);
3967 void net_disable_timestamp(void);
3969 #ifdef CONFIG_PROC_FS
3970 int __init dev_proc_init(void);
3972 #define dev_proc_init() 0
3975 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3976 struct sk_buff *skb, struct net_device *dev,
3979 skb->xmit_more = more ? 1 : 0;
3980 return ops->ndo_start_xmit(skb, dev);
3983 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3984 struct netdev_queue *txq, bool more)
3986 const struct net_device_ops *ops = dev->netdev_ops;
3989 rc = __netdev_start_xmit(ops, skb, dev, more);
3990 if (rc == NETDEV_TX_OK)
3991 txq_trans_update(txq);
3996 int netdev_class_create_file_ns(struct class_attribute *class_attr,
3998 void netdev_class_remove_file_ns(struct class_attribute *class_attr,
4001 static inline int netdev_class_create_file(struct class_attribute *class_attr)
4003 return netdev_class_create_file_ns(class_attr, NULL);
4006 static inline void netdev_class_remove_file(struct class_attribute *class_attr)
4008 netdev_class_remove_file_ns(class_attr, NULL);
4011 extern struct kobj_ns_type_operations net_ns_type_operations;
4013 const char *netdev_drivername(const struct net_device *dev);
4015 void linkwatch_run_queue(void);
4017 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4018 netdev_features_t f2)
4020 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4021 if (f1 & NETIF_F_HW_CSUM)
4022 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4024 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4030 static inline netdev_features_t netdev_get_wanted_features(
4031 struct net_device *dev)
4033 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4035 netdev_features_t netdev_increment_features(netdev_features_t all,
4036 netdev_features_t one, netdev_features_t mask);
4038 /* Allow TSO being used on stacked device :
4039 * Performing the GSO segmentation before last device
4040 * is a performance improvement.
4042 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4043 netdev_features_t mask)
4045 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4048 int __netdev_update_features(struct net_device *dev);
4049 void netdev_update_features(struct net_device *dev);
4050 void netdev_change_features(struct net_device *dev);
4052 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4053 struct net_device *dev);
4055 netdev_features_t passthru_features_check(struct sk_buff *skb,
4056 struct net_device *dev,
4057 netdev_features_t features);
4058 netdev_features_t netif_skb_features(struct sk_buff *skb);
4060 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4062 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4064 /* check flags correspondence */
4065 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4066 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
4067 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4068 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4069 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4070 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4071 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4072 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4073 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4074 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4075 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4076 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4077 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4078 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4079 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4080 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4082 return (features & feature) == feature;
4085 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4087 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4088 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4091 static inline bool netif_needs_gso(struct sk_buff *skb,
4092 netdev_features_t features)
4094 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4095 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4096 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4099 static inline void netif_set_gso_max_size(struct net_device *dev,
4102 dev->gso_max_size = size;
4105 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4106 int pulled_hlen, u16 mac_offset,
4109 skb->protocol = protocol;
4110 skb->encapsulation = 1;
4111 skb_push(skb, pulled_hlen);
4112 skb_reset_transport_header(skb);
4113 skb->mac_header = mac_offset;
4114 skb->network_header = skb->mac_header + mac_len;
4115 skb->mac_len = mac_len;
4118 static inline bool netif_is_macsec(const struct net_device *dev)
4120 return dev->priv_flags & IFF_MACSEC;
4123 static inline bool netif_is_macvlan(const struct net_device *dev)
4125 return dev->priv_flags & IFF_MACVLAN;
4128 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4130 return dev->priv_flags & IFF_MACVLAN_PORT;
4133 static inline bool netif_is_ipvlan(const struct net_device *dev)
4135 return dev->priv_flags & IFF_IPVLAN_SLAVE;
4138 static inline bool netif_is_ipvlan_port(const struct net_device *dev)
4140 return dev->priv_flags & IFF_IPVLAN_MASTER;
4143 static inline bool netif_is_bond_master(const struct net_device *dev)
4145 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4148 static inline bool netif_is_bond_slave(const struct net_device *dev)
4150 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4153 static inline bool netif_supports_nofcs(struct net_device *dev)
4155 return dev->priv_flags & IFF_SUPP_NOFCS;
4158 static inline bool netif_is_l3_master(const struct net_device *dev)
4160 return dev->priv_flags & IFF_L3MDEV_MASTER;
4163 static inline bool netif_is_l3_slave(const struct net_device *dev)
4165 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4168 static inline bool netif_is_bridge_master(const struct net_device *dev)
4170 return dev->priv_flags & IFF_EBRIDGE;
4173 static inline bool netif_is_bridge_port(const struct net_device *dev)
4175 return dev->priv_flags & IFF_BRIDGE_PORT;
4178 static inline bool netif_is_ovs_master(const struct net_device *dev)
4180 return dev->priv_flags & IFF_OPENVSWITCH;
4183 static inline bool netif_is_team_master(const struct net_device *dev)
4185 return dev->priv_flags & IFF_TEAM;
4188 static inline bool netif_is_team_port(const struct net_device *dev)
4190 return dev->priv_flags & IFF_TEAM_PORT;
4193 static inline bool netif_is_lag_master(const struct net_device *dev)
4195 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4198 static inline bool netif_is_lag_port(const struct net_device *dev)
4200 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4203 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4205 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4208 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4209 static inline void netif_keep_dst(struct net_device *dev)
4211 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4214 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4215 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4217 /* TODO: reserve and use an additional IFF bit, if we get more users */
4218 return dev->priv_flags & IFF_MACSEC;
4221 extern struct pernet_operations __net_initdata loopback_net_ops;
4223 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4225 /* netdev_printk helpers, similar to dev_printk */
4227 static inline const char *netdev_name(const struct net_device *dev)
4229 if (!dev->name[0] || strchr(dev->name, '%'))
4230 return "(unnamed net_device)";
4234 static inline const char *netdev_reg_state(const struct net_device *dev)
4236 switch (dev->reg_state) {
4237 case NETREG_UNINITIALIZED: return " (uninitialized)";
4238 case NETREG_REGISTERED: return "";
4239 case NETREG_UNREGISTERING: return " (unregistering)";
4240 case NETREG_UNREGISTERED: return " (unregistered)";
4241 case NETREG_RELEASED: return " (released)";
4242 case NETREG_DUMMY: return " (dummy)";
4245 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4246 return " (unknown)";
4250 void netdev_printk(const char *level, const struct net_device *dev,
4251 const char *format, ...);
4253 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4255 void netdev_alert(const struct net_device *dev, const char *format, ...);
4257 void netdev_crit(const struct net_device *dev, const char *format, ...);
4259 void netdev_err(const struct net_device *dev, const char *format, ...);
4261 void netdev_warn(const struct net_device *dev, const char *format, ...);
4263 void netdev_notice(const struct net_device *dev, const char *format, ...);
4265 void netdev_info(const struct net_device *dev, const char *format, ...);
4267 #define MODULE_ALIAS_NETDEV(device) \
4268 MODULE_ALIAS("netdev-" device)
4270 #if defined(CONFIG_DYNAMIC_DEBUG)
4271 #define netdev_dbg(__dev, format, args...) \
4273 dynamic_netdev_dbg(__dev, format, ##args); \
4275 #elif defined(DEBUG)
4276 #define netdev_dbg(__dev, format, args...) \
4277 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4279 #define netdev_dbg(__dev, format, args...) \
4282 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4286 #if defined(VERBOSE_DEBUG)
4287 #define netdev_vdbg netdev_dbg
4290 #define netdev_vdbg(dev, format, args...) \
4293 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4299 * netdev_WARN() acts like dev_printk(), but with the key difference
4300 * of using a WARN/WARN_ON to get the message out, including the
4301 * file/line information and a backtrace.
4303 #define netdev_WARN(dev, format, args...) \
4304 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
4305 netdev_reg_state(dev), ##args)
4307 /* netif printk helpers, similar to netdev_printk */
4309 #define netif_printk(priv, type, level, dev, fmt, args...) \
4311 if (netif_msg_##type(priv)) \
4312 netdev_printk(level, (dev), fmt, ##args); \
4315 #define netif_level(level, priv, type, dev, fmt, args...) \
4317 if (netif_msg_##type(priv)) \
4318 netdev_##level(dev, fmt, ##args); \
4321 #define netif_emerg(priv, type, dev, fmt, args...) \
4322 netif_level(emerg, priv, type, dev, fmt, ##args)
4323 #define netif_alert(priv, type, dev, fmt, args...) \
4324 netif_level(alert, priv, type, dev, fmt, ##args)
4325 #define netif_crit(priv, type, dev, fmt, args...) \
4326 netif_level(crit, priv, type, dev, fmt, ##args)
4327 #define netif_err(priv, type, dev, fmt, args...) \
4328 netif_level(err, priv, type, dev, fmt, ##args)
4329 #define netif_warn(priv, type, dev, fmt, args...) \
4330 netif_level(warn, priv, type, dev, fmt, ##args)
4331 #define netif_notice(priv, type, dev, fmt, args...) \
4332 netif_level(notice, priv, type, dev, fmt, ##args)
4333 #define netif_info(priv, type, dev, fmt, args...) \
4334 netif_level(info, priv, type, dev, fmt, ##args)
4336 #if defined(CONFIG_DYNAMIC_DEBUG)
4337 #define netif_dbg(priv, type, netdev, format, args...) \
4339 if (netif_msg_##type(priv)) \
4340 dynamic_netdev_dbg(netdev, format, ##args); \
4342 #elif defined(DEBUG)
4343 #define netif_dbg(priv, type, dev, format, args...) \
4344 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4346 #define netif_dbg(priv, type, dev, format, args...) \
4349 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4354 /* if @cond then downgrade to debug, else print at @level */
4355 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4358 netif_dbg(priv, type, netdev, fmt, ##args); \
4360 netif_ ## level(priv, type, netdev, fmt, ##args); \
4363 #if defined(VERBOSE_DEBUG)
4364 #define netif_vdbg netif_dbg
4366 #define netif_vdbg(priv, type, dev, format, args...) \
4369 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4375 * The list of packet types we will receive (as opposed to discard)
4376 * and the routines to invoke.
4378 * Why 16. Because with 16 the only overlap we get on a hash of the
4379 * low nibble of the protocol value is RARP/SNAP/X.25.
4381 * NOTE: That is no longer true with the addition of VLAN tags. Not
4382 * sure which should go first, but I bet it won't make much
4383 * difference if we are running VLANs. The good news is that
4384 * this protocol won't be in the list unless compiled in, so
4385 * the average user (w/out VLANs) will not be adversely affected.
4401 #define PTYPE_HASH_SIZE (16)
4402 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4404 #endif /* _LINUX_NETDEVICE_H */