2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/timer.h>
29 #include <linux/bug.h>
30 #include <linux/delay.h>
31 #include <linux/atomic.h>
32 #include <linux/prefetch.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/workqueue.h>
39 #include <linux/dynamic_queue_limits.h>
41 #include <linux/ethtool.h>
42 #include <net/net_namespace.h>
44 #include <net/dcbnl.h>
46 #include <net/netprio_cgroup.h>
49 #include <linux/netdev_features.h>
50 #include <linux/neighbour.h>
51 #include <uapi/linux/netdevice.h>
52 #include <uapi/linux/if_bonding.h>
53 #include <uapi/linux/pkt_cls.h>
54 #include <linux/hashtable.h>
64 /* 802.15.4 specific */
67 /* UDP Tunnel offloads */
68 struct udp_tunnel_info;
72 void netdev_set_default_ethtool_ops(struct net_device *dev,
73 const struct ethtool_ops *ops);
75 /* Backlog congestion levels */
76 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
77 #define NET_RX_DROP 1 /* packet dropped */
80 * Transmit return codes: transmit return codes originate from three different
83 * - qdisc return codes
84 * - driver transmit return codes
87 * Drivers are allowed to return any one of those in their hard_start_xmit()
88 * function. Real network devices commonly used with qdiscs should only return
89 * the driver transmit return codes though - when qdiscs are used, the actual
90 * transmission happens asynchronously, so the value is not propagated to
91 * higher layers. Virtual network devices transmit synchronously; in this case
92 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
93 * others are propagated to higher layers.
96 /* qdisc ->enqueue() return codes. */
97 #define NET_XMIT_SUCCESS 0x00
98 #define NET_XMIT_DROP 0x01 /* skb dropped */
99 #define NET_XMIT_CN 0x02 /* congestion notification */
100 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
102 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
103 * indicates that the device will soon be dropping packets, or already drops
104 * some packets of the same priority; prompting us to send less aggressively. */
105 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
106 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
108 /* Driver transmit return codes */
109 #define NETDEV_TX_MASK 0xf0
112 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
113 NETDEV_TX_OK = 0x00, /* driver took care of packet */
114 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
116 typedef enum netdev_tx netdev_tx_t;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc < NET_XMIT_MASK))
137 * Compute the worst-case header length according to the protocols
141 #if defined(CONFIG_HYPERV_NET)
142 # define LL_MAX_HEADER 128
143 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
144 # if defined(CONFIG_MAC80211_MESH)
145 # define LL_MAX_HEADER 128
147 # define LL_MAX_HEADER 96
150 # define LL_MAX_HEADER 32
153 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
154 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
155 #define MAX_HEADER LL_MAX_HEADER
157 #define MAX_HEADER (LL_MAX_HEADER + 48)
161 * Old network device statistics. Fields are native words
162 * (unsigned long) so they can be read and written atomically.
165 struct net_device_stats {
166 unsigned long rx_packets;
167 unsigned long tx_packets;
168 unsigned long rx_bytes;
169 unsigned long tx_bytes;
170 unsigned long rx_errors;
171 unsigned long tx_errors;
172 unsigned long rx_dropped;
173 unsigned long tx_dropped;
174 unsigned long multicast;
175 unsigned long collisions;
176 unsigned long rx_length_errors;
177 unsigned long rx_over_errors;
178 unsigned long rx_crc_errors;
179 unsigned long rx_frame_errors;
180 unsigned long rx_fifo_errors;
181 unsigned long rx_missed_errors;
182 unsigned long tx_aborted_errors;
183 unsigned long tx_carrier_errors;
184 unsigned long tx_fifo_errors;
185 unsigned long tx_heartbeat_errors;
186 unsigned long tx_window_errors;
187 unsigned long rx_compressed;
188 unsigned long tx_compressed;
192 #include <linux/cache.h>
193 #include <linux/skbuff.h>
196 #include <linux/static_key.h>
197 extern struct static_key rps_needed;
198 extern struct static_key rfs_needed;
205 struct netdev_hw_addr {
206 struct list_head list;
207 unsigned char addr[MAX_ADDR_LEN];
209 #define NETDEV_HW_ADDR_T_LAN 1
210 #define NETDEV_HW_ADDR_T_SAN 2
211 #define NETDEV_HW_ADDR_T_SLAVE 3
212 #define NETDEV_HW_ADDR_T_UNICAST 4
213 #define NETDEV_HW_ADDR_T_MULTICAST 5
218 struct rcu_head rcu_head;
221 struct netdev_hw_addr_list {
222 struct list_head list;
226 #define netdev_hw_addr_list_count(l) ((l)->count)
227 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
228 #define netdev_hw_addr_list_for_each(ha, l) \
229 list_for_each_entry(ha, &(l)->list, list)
231 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
232 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
233 #define netdev_for_each_uc_addr(ha, dev) \
234 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
236 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
237 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
238 #define netdev_for_each_mc_addr(ha, dev) \
239 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
245 /* cached hardware header; allow for machine alignment needs. */
246 #define HH_DATA_MOD 16
247 #define HH_DATA_OFF(__len) \
248 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
249 #define HH_DATA_ALIGN(__len) \
250 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
251 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
254 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
256 * dev->hard_header_len ? (dev->hard_header_len +
257 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
259 * We could use other alignment values, but we must maintain the
260 * relationship HH alignment <= LL alignment.
262 #define LL_RESERVED_SPACE(dev) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
265 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
268 int (*create) (struct sk_buff *skb, struct net_device *dev,
269 unsigned short type, const void *daddr,
270 const void *saddr, unsigned int len);
271 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
272 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
273 void (*cache_update)(struct hh_cache *hh,
274 const struct net_device *dev,
275 const unsigned char *haddr);
276 bool (*validate)(const char *ll_header, unsigned int len);
279 /* These flag bits are private to the generic network queueing
280 * layer; they may not be explicitly referenced by any other
284 enum netdev_state_t {
286 __LINK_STATE_PRESENT,
287 __LINK_STATE_NOCARRIER,
288 __LINK_STATE_LINKWATCH_PENDING,
289 __LINK_STATE_DORMANT,
294 * This structure holds boot-time configured netdevice settings. They
295 * are then used in the device probing.
297 struct netdev_boot_setup {
301 #define NETDEV_BOOT_SETUP_MAX 8
303 int __init netdev_boot_setup(char *str);
306 struct list_head list;
311 * size of gro hash buckets, must less than bit number of
312 * napi_struct::gro_bitmask
314 #define GRO_HASH_BUCKETS 8
317 * Structure for NAPI scheduling similar to tasklet but with weighting
320 /* The poll_list must only be managed by the entity which
321 * changes the state of the NAPI_STATE_SCHED bit. This means
322 * whoever atomically sets that bit can add this napi_struct
323 * to the per-CPU poll_list, and whoever clears that bit
324 * can remove from the list right before clearing the bit.
326 struct list_head poll_list;
330 unsigned long gro_bitmask;
331 int (*poll)(struct napi_struct *, int);
332 #ifdef CONFIG_NETPOLL
335 struct net_device *dev;
336 struct gro_list gro_hash[GRO_HASH_BUCKETS];
338 struct hrtimer timer;
339 struct list_head dev_list;
340 struct hlist_node napi_hash_node;
341 unsigned int napi_id;
345 NAPI_STATE_SCHED, /* Poll is scheduled */
346 NAPI_STATE_MISSED, /* reschedule a napi */
347 NAPI_STATE_DISABLE, /* Disable pending */
348 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
349 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
350 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
351 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
355 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
356 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
357 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
358 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
359 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
360 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
361 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
372 typedef enum gro_result gro_result_t;
375 * enum rx_handler_result - Possible return values for rx_handlers.
376 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
378 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
379 * case skb->dev was changed by rx_handler.
380 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
381 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
383 * rx_handlers are functions called from inside __netif_receive_skb(), to do
384 * special processing of the skb, prior to delivery to protocol handlers.
386 * Currently, a net_device can only have a single rx_handler registered. Trying
387 * to register a second rx_handler will return -EBUSY.
389 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
390 * To unregister a rx_handler on a net_device, use
391 * netdev_rx_handler_unregister().
393 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
396 * If the rx_handler consumed the skb in some way, it should return
397 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
398 * the skb to be delivered in some other way.
400 * If the rx_handler changed skb->dev, to divert the skb to another
401 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
402 * new device will be called if it exists.
404 * If the rx_handler decides the skb should be ignored, it should return
405 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
406 * are registered on exact device (ptype->dev == skb->dev).
408 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
409 * delivered, it should return RX_HANDLER_PASS.
411 * A device without a registered rx_handler will behave as if rx_handler
412 * returned RX_HANDLER_PASS.
415 enum rx_handler_result {
421 typedef enum rx_handler_result rx_handler_result_t;
422 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
424 void __napi_schedule(struct napi_struct *n);
425 void __napi_schedule_irqoff(struct napi_struct *n);
427 static inline bool napi_disable_pending(struct napi_struct *n)
429 return test_bit(NAPI_STATE_DISABLE, &n->state);
432 bool napi_schedule_prep(struct napi_struct *n);
435 * napi_schedule - schedule NAPI poll
438 * Schedule NAPI poll routine to be called if it is not already
441 static inline void napi_schedule(struct napi_struct *n)
443 if (napi_schedule_prep(n))
448 * napi_schedule_irqoff - schedule NAPI poll
451 * Variant of napi_schedule(), assuming hard irqs are masked.
453 static inline void napi_schedule_irqoff(struct napi_struct *n)
455 if (napi_schedule_prep(n))
456 __napi_schedule_irqoff(n);
459 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
460 static inline bool napi_reschedule(struct napi_struct *napi)
462 if (napi_schedule_prep(napi)) {
463 __napi_schedule(napi);
469 bool napi_complete_done(struct napi_struct *n, int work_done);
471 * napi_complete - NAPI processing complete
474 * Mark NAPI processing as complete.
475 * Consider using napi_complete_done() instead.
476 * Return false if device should avoid rearming interrupts.
478 static inline bool napi_complete(struct napi_struct *n)
480 return napi_complete_done(n, 0);
484 * napi_hash_del - remove a NAPI from global table
485 * @napi: NAPI context
487 * Warning: caller must observe RCU grace period
488 * before freeing memory containing @napi, if
489 * this function returns true.
490 * Note: core networking stack automatically calls it
491 * from netif_napi_del().
492 * Drivers might want to call this helper to combine all
493 * the needed RCU grace periods into a single one.
495 bool napi_hash_del(struct napi_struct *napi);
498 * napi_disable - prevent NAPI from scheduling
501 * Stop NAPI from being scheduled on this context.
502 * Waits till any outstanding processing completes.
504 void napi_disable(struct napi_struct *n);
507 * napi_enable - enable NAPI scheduling
510 * Resume NAPI from being scheduled on this context.
511 * Must be paired with napi_disable.
513 static inline void napi_enable(struct napi_struct *n)
515 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
516 smp_mb__before_atomic();
517 clear_bit(NAPI_STATE_SCHED, &n->state);
518 clear_bit(NAPI_STATE_NPSVC, &n->state);
522 * napi_synchronize - wait until NAPI is not running
525 * Wait until NAPI is done being scheduled on this context.
526 * Waits till any outstanding processing completes but
527 * does not disable future activations.
529 static inline void napi_synchronize(const struct napi_struct *n)
531 if (IS_ENABLED(CONFIG_SMP))
532 while (test_bit(NAPI_STATE_SCHED, &n->state))
539 * napi_if_scheduled_mark_missed - if napi is running, set the
543 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
546 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
548 unsigned long val, new;
551 val = READ_ONCE(n->state);
552 if (val & NAPIF_STATE_DISABLE)
555 if (!(val & NAPIF_STATE_SCHED))
558 new = val | NAPIF_STATE_MISSED;
559 } while (cmpxchg(&n->state, val, new) != val);
564 enum netdev_queue_state_t {
565 __QUEUE_STATE_DRV_XOFF,
566 __QUEUE_STATE_STACK_XOFF,
567 __QUEUE_STATE_FROZEN,
570 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
571 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
572 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
574 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
575 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
577 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
581 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
582 * netif_tx_* functions below are used to manipulate this flag. The
583 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
584 * queue independently. The netif_xmit_*stopped functions below are called
585 * to check if the queue has been stopped by the driver or stack (either
586 * of the XOFF bits are set in the state). Drivers should not need to call
587 * netif_xmit*stopped functions, they should only be using netif_tx_*.
590 struct netdev_queue {
594 struct net_device *dev;
595 struct Qdisc __rcu *qdisc;
596 struct Qdisc *qdisc_sleeping;
600 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
603 unsigned long tx_maxrate;
605 * Number of TX timeouts for this queue
606 * (/sys/class/net/DEV/Q/trans_timeout)
608 unsigned long trans_timeout;
610 /* Subordinate device that the queue has been assigned to */
611 struct net_device *sb_dev;
612 #ifdef CONFIG_XDP_SOCKETS
613 struct xdp_umem *umem;
618 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
621 * Time (in jiffies) of last Tx
623 unsigned long trans_start;
630 } ____cacheline_aligned_in_smp;
632 extern int sysctl_fb_tunnels_only_for_init_net;
634 static inline bool net_has_fallback_tunnels(const struct net *net)
636 return net == &init_net ||
637 !IS_ENABLED(CONFIG_SYSCTL) ||
638 !sysctl_fb_tunnels_only_for_init_net;
641 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
643 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
650 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
652 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
659 * This structure holds an RPS map which can be of variable length. The
660 * map is an array of CPUs.
667 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
670 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
671 * tail pointer for that CPU's input queue at the time of last enqueue, and
672 * a hardware filter index.
674 struct rps_dev_flow {
677 unsigned int last_qtail;
679 #define RPS_NO_FILTER 0xffff
682 * The rps_dev_flow_table structure contains a table of flow mappings.
684 struct rps_dev_flow_table {
687 struct rps_dev_flow flows[0];
689 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
690 ((_num) * sizeof(struct rps_dev_flow)))
693 * The rps_sock_flow_table contains mappings of flows to the last CPU
694 * on which they were processed by the application (set in recvmsg).
695 * Each entry is a 32bit value. Upper part is the high-order bits
696 * of flow hash, lower part is CPU number.
697 * rps_cpu_mask is used to partition the space, depending on number of
698 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
699 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
700 * meaning we use 32-6=26 bits for the hash.
702 struct rps_sock_flow_table {
705 u32 ents[0] ____cacheline_aligned_in_smp;
707 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
709 #define RPS_NO_CPU 0xffff
711 extern u32 rps_cpu_mask;
712 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
714 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
718 unsigned int index = hash & table->mask;
719 u32 val = hash & ~rps_cpu_mask;
721 /* We only give a hint, preemption can change CPU under us */
722 val |= raw_smp_processor_id();
724 if (table->ents[index] != val)
725 table->ents[index] = val;
729 #ifdef CONFIG_RFS_ACCEL
730 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
733 #endif /* CONFIG_RPS */
735 /* This structure contains an instance of an RX queue. */
736 struct netdev_rx_queue {
738 struct rps_map __rcu *rps_map;
739 struct rps_dev_flow_table __rcu *rps_flow_table;
742 struct net_device *dev;
743 struct xdp_rxq_info xdp_rxq;
744 #ifdef CONFIG_XDP_SOCKETS
745 struct xdp_umem *umem;
747 } ____cacheline_aligned_in_smp;
750 * RX queue sysfs structures and functions.
752 struct rx_queue_attribute {
753 struct attribute attr;
754 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
755 ssize_t (*store)(struct netdev_rx_queue *queue,
756 const char *buf, size_t len);
761 * This structure holds an XPS map which can be of variable length. The
762 * map is an array of queues.
766 unsigned int alloc_len;
770 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
771 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
772 - sizeof(struct xps_map)) / sizeof(u16))
775 * This structure holds all XPS maps for device. Maps are indexed by CPU.
777 struct xps_dev_maps {
779 struct xps_map __rcu *attr_map[0]; /* Either CPUs map or RXQs map */
782 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
783 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
785 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
786 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
788 #endif /* CONFIG_XPS */
790 #define TC_MAX_QUEUE 16
791 #define TC_BITMASK 15
792 /* HW offloaded queuing disciplines txq count and offset maps */
793 struct netdev_tc_txq {
798 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
800 * This structure is to hold information about the device
801 * configured to run FCoE protocol stack.
803 struct netdev_fcoe_hbainfo {
804 char manufacturer[64];
805 char serial_number[64];
806 char hardware_version[64];
807 char driver_version[64];
808 char optionrom_version[64];
809 char firmware_version[64];
811 char model_description[256];
815 #define MAX_PHYS_ITEM_ID_LEN 32
817 /* This structure holds a unique identifier to identify some
818 * physical item (port for example) used by a netdevice.
820 struct netdev_phys_item_id {
821 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
822 unsigned char id_len;
825 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
826 struct netdev_phys_item_id *b)
828 return a->id_len == b->id_len &&
829 memcmp(a->id, b->id, a->id_len) == 0;
832 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
834 struct net_device *sb_dev);
837 TC_SETUP_QDISC_MQPRIO,
840 TC_SETUP_CLSMATCHALL,
852 /* These structures hold the attributes of bpf state that are being passed
853 * to the netdevice through the bpf op.
855 enum bpf_netdev_command {
856 /* Set or clear a bpf program used in the earliest stages of packet
857 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
858 * is responsible for calling bpf_prog_put on any old progs that are
859 * stored. In case of error, the callee need not release the new prog
860 * reference, but on success it takes ownership and must bpf_prog_put
861 * when it is no longer used.
867 /* BPF program for offload callbacks, invoked at program load time. */
868 BPF_OFFLOAD_MAP_ALLOC,
869 BPF_OFFLOAD_MAP_FREE,
874 struct bpf_prog_offload_ops;
875 struct netlink_ext_ack;
879 enum bpf_netdev_command command;
884 struct bpf_prog *prog;
885 struct netlink_ext_ack *extack;
887 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
890 /* flags with which program was installed */
893 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
895 struct bpf_offloaded_map *offmap;
897 /* XDP_QUERY_XSK_UMEM, XDP_SETUP_XSK_UMEM */
899 struct xdp_umem *umem; /* out for query*/
900 u16 queue_id; /* in for query */
905 #ifdef CONFIG_XFRM_OFFLOAD
907 int (*xdo_dev_state_add) (struct xfrm_state *x);
908 void (*xdo_dev_state_delete) (struct xfrm_state *x);
909 void (*xdo_dev_state_free) (struct xfrm_state *x);
910 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
911 struct xfrm_state *x);
912 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
916 #if IS_ENABLED(CONFIG_TLS_DEVICE)
917 enum tls_offload_ctx_dir {
918 TLS_OFFLOAD_CTX_DIR_RX,
919 TLS_OFFLOAD_CTX_DIR_TX,
922 struct tls_crypto_info;
926 int (*tls_dev_add)(struct net_device *netdev, struct sock *sk,
927 enum tls_offload_ctx_dir direction,
928 struct tls_crypto_info *crypto_info,
929 u32 start_offload_tcp_sn);
930 void (*tls_dev_del)(struct net_device *netdev,
931 struct tls_context *ctx,
932 enum tls_offload_ctx_dir direction);
933 void (*tls_dev_resync_rx)(struct net_device *netdev,
934 struct sock *sk, u32 seq, u64 rcd_sn);
939 struct rcu_head rcuhead;
944 * This structure defines the management hooks for network devices.
945 * The following hooks can be defined; unless noted otherwise, they are
946 * optional and can be filled with a null pointer.
948 * int (*ndo_init)(struct net_device *dev);
949 * This function is called once when a network device is registered.
950 * The network device can use this for any late stage initialization
951 * or semantic validation. It can fail with an error code which will
952 * be propagated back to register_netdev.
954 * void (*ndo_uninit)(struct net_device *dev);
955 * This function is called when device is unregistered or when registration
956 * fails. It is not called if init fails.
958 * int (*ndo_open)(struct net_device *dev);
959 * This function is called when a network device transitions to the up
962 * int (*ndo_stop)(struct net_device *dev);
963 * This function is called when a network device transitions to the down
966 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
967 * struct net_device *dev);
968 * Called when a packet needs to be transmitted.
969 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
970 * the queue before that can happen; it's for obsolete devices and weird
971 * corner cases, but the stack really does a non-trivial amount
972 * of useless work if you return NETDEV_TX_BUSY.
973 * Required; cannot be NULL.
975 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
976 * struct net_device *dev
977 * netdev_features_t features);
978 * Called by core transmit path to determine if device is capable of
979 * performing offload operations on a given packet. This is to give
980 * the device an opportunity to implement any restrictions that cannot
981 * be otherwise expressed by feature flags. The check is called with
982 * the set of features that the stack has calculated and it returns
983 * those the driver believes to be appropriate.
985 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
986 * struct net_device *sb_dev,
987 * select_queue_fallback_t fallback);
988 * Called to decide which queue to use when device supports multiple
991 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
992 * This function is called to allow device receiver to make
993 * changes to configuration when multicast or promiscuous is enabled.
995 * void (*ndo_set_rx_mode)(struct net_device *dev);
996 * This function is called device changes address list filtering.
997 * If driver handles unicast address filtering, it should set
998 * IFF_UNICAST_FLT in its priv_flags.
1000 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1001 * This function is called when the Media Access Control address
1002 * needs to be changed. If this interface is not defined, the
1003 * MAC address can not be changed.
1005 * int (*ndo_validate_addr)(struct net_device *dev);
1006 * Test if Media Access Control address is valid for the device.
1008 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1009 * Called when a user requests an ioctl which can't be handled by
1010 * the generic interface code. If not defined ioctls return
1011 * not supported error code.
1013 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1014 * Used to set network devices bus interface parameters. This interface
1015 * is retained for legacy reasons; new devices should use the bus
1016 * interface (PCI) for low level management.
1018 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1019 * Called when a user wants to change the Maximum Transfer Unit
1022 * void (*ndo_tx_timeout)(struct net_device *dev);
1023 * Callback used when the transmitter has not made any progress
1024 * for dev->watchdog ticks.
1026 * void (*ndo_get_stats64)(struct net_device *dev,
1027 * struct rtnl_link_stats64 *storage);
1028 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1029 * Called when a user wants to get the network device usage
1030 * statistics. Drivers must do one of the following:
1031 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1032 * rtnl_link_stats64 structure passed by the caller.
1033 * 2. Define @ndo_get_stats to update a net_device_stats structure
1034 * (which should normally be dev->stats) and return a pointer to
1035 * it. The structure may be changed asynchronously only if each
1036 * field is written atomically.
1037 * 3. Update dev->stats asynchronously and atomically, and define
1038 * neither operation.
1040 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1041 * Return true if this device supports offload stats of this attr_id.
1043 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1045 * Get statistics for offload operations by attr_id. Write it into the
1046 * attr_data pointer.
1048 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1049 * If device supports VLAN filtering this function is called when a
1050 * VLAN id is registered.
1052 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1053 * If device supports VLAN filtering this function is called when a
1054 * VLAN id is unregistered.
1056 * void (*ndo_poll_controller)(struct net_device *dev);
1058 * SR-IOV management functions.
1059 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1060 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1061 * u8 qos, __be16 proto);
1062 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1064 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1065 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1066 * int (*ndo_get_vf_config)(struct net_device *dev,
1067 * int vf, struct ifla_vf_info *ivf);
1068 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1069 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1070 * struct nlattr *port[]);
1072 * Enable or disable the VF ability to query its RSS Redirection Table and
1073 * Hash Key. This is needed since on some devices VF share this information
1074 * with PF and querying it may introduce a theoretical security risk.
1075 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1076 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1077 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1079 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1080 * This is always called from the stack with the rtnl lock held and netif
1081 * tx queues stopped. This allows the netdevice to perform queue
1082 * management safely.
1084 * Fiber Channel over Ethernet (FCoE) offload functions.
1085 * int (*ndo_fcoe_enable)(struct net_device *dev);
1086 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1087 * so the underlying device can perform whatever needed configuration or
1088 * initialization to support acceleration of FCoE traffic.
1090 * int (*ndo_fcoe_disable)(struct net_device *dev);
1091 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1092 * so the underlying device can perform whatever needed clean-ups to
1093 * stop supporting acceleration of FCoE traffic.
1095 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1096 * struct scatterlist *sgl, unsigned int sgc);
1097 * Called when the FCoE Initiator wants to initialize an I/O that
1098 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1099 * perform necessary setup and returns 1 to indicate the device is set up
1100 * successfully to perform DDP on this I/O, otherwise this returns 0.
1102 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1103 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1104 * indicated by the FC exchange id 'xid', so the underlying device can
1105 * clean up and reuse resources for later DDP requests.
1107 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1108 * struct scatterlist *sgl, unsigned int sgc);
1109 * Called when the FCoE Target wants to initialize an I/O that
1110 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1111 * perform necessary setup and returns 1 to indicate the device is set up
1112 * successfully to perform DDP on this I/O, otherwise this returns 0.
1114 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1115 * struct netdev_fcoe_hbainfo *hbainfo);
1116 * Called when the FCoE Protocol stack wants information on the underlying
1117 * device. This information is utilized by the FCoE protocol stack to
1118 * register attributes with Fiber Channel management service as per the
1119 * FC-GS Fabric Device Management Information(FDMI) specification.
1121 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1122 * Called when the underlying device wants to override default World Wide
1123 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1124 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1125 * protocol stack to use.
1128 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1129 * u16 rxq_index, u32 flow_id);
1130 * Set hardware filter for RFS. rxq_index is the target queue index;
1131 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1132 * Return the filter ID on success, or a negative error code.
1134 * Slave management functions (for bridge, bonding, etc).
1135 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1136 * Called to make another netdev an underling.
1138 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1139 * Called to release previously enslaved netdev.
1141 * Feature/offload setting functions.
1142 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1143 * netdev_features_t features);
1144 * Adjusts the requested feature flags according to device-specific
1145 * constraints, and returns the resulting flags. Must not modify
1148 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1149 * Called to update device configuration to new features. Passed
1150 * feature set might be less than what was returned by ndo_fix_features()).
1151 * Must return >0 or -errno if it changed dev->features itself.
1153 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1154 * struct net_device *dev,
1155 * const unsigned char *addr, u16 vid, u16 flags)
1156 * Adds an FDB entry to dev for addr.
1157 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1158 * struct net_device *dev,
1159 * const unsigned char *addr, u16 vid)
1160 * Deletes the FDB entry from dev coresponding to addr.
1161 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1162 * struct net_device *dev, struct net_device *filter_dev,
1164 * Used to add FDB entries to dump requests. Implementers should add
1165 * entries to skb and update idx with the number of entries.
1167 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1169 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1170 * struct net_device *dev, u32 filter_mask,
1172 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1175 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1176 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1177 * which do not represent real hardware may define this to allow their
1178 * userspace components to manage their virtual carrier state. Devices
1179 * that determine carrier state from physical hardware properties (eg
1180 * network cables) or protocol-dependent mechanisms (eg
1181 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1183 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1184 * struct netdev_phys_item_id *ppid);
1185 * Called to get ID of physical port of this device. If driver does
1186 * not implement this, it is assumed that the hw is not able to have
1187 * multiple net devices on single physical port.
1189 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1190 * struct udp_tunnel_info *ti);
1191 * Called by UDP tunnel to notify a driver about the UDP port and socket
1192 * address family that a UDP tunnel is listnening to. It is called only
1193 * when a new port starts listening. The operation is protected by the
1196 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1197 * struct udp_tunnel_info *ti);
1198 * Called by UDP tunnel to notify the driver about a UDP port and socket
1199 * address family that the UDP tunnel is not listening to anymore. The
1200 * operation is protected by the RTNL.
1202 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1203 * struct net_device *dev)
1204 * Called by upper layer devices to accelerate switching or other
1205 * station functionality into hardware. 'pdev is the lowerdev
1206 * to use for the offload and 'dev' is the net device that will
1207 * back the offload. Returns a pointer to the private structure
1208 * the upper layer will maintain.
1209 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1210 * Called by upper layer device to delete the station created
1211 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1212 * the station and priv is the structure returned by the add
1214 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1215 * int queue_index, u32 maxrate);
1216 * Called when a user wants to set a max-rate limitation of specific
1218 * int (*ndo_get_iflink)(const struct net_device *dev);
1219 * Called to get the iflink value of this device.
1220 * void (*ndo_change_proto_down)(struct net_device *dev,
1222 * This function is used to pass protocol port error state information
1223 * to the switch driver. The switch driver can react to the proto_down
1224 * by doing a phys down on the associated switch port.
1225 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1226 * This function is used to get egress tunnel information for given skb.
1227 * This is useful for retrieving outer tunnel header parameters while
1229 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1230 * This function is used to specify the headroom that the skb must
1231 * consider when allocation skb during packet reception. Setting
1232 * appropriate rx headroom value allows avoiding skb head copy on
1233 * forward. Setting a negative value resets the rx headroom to the
1235 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1236 * This function is used to set or query state related to XDP on the
1237 * netdevice and manage BPF offload. See definition of
1238 * enum bpf_netdev_command for details.
1239 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1241 * This function is used to submit @n XDP packets for transmit on a
1242 * netdevice. Returns number of frames successfully transmitted, frames
1243 * that got dropped are freed/returned via xdp_return_frame().
1244 * Returns negative number, means general error invoking ndo, meaning
1245 * no frames were xmit'ed and core-caller will free all frames.
1247 struct net_device_ops {
1248 int (*ndo_init)(struct net_device *dev);
1249 void (*ndo_uninit)(struct net_device *dev);
1250 int (*ndo_open)(struct net_device *dev);
1251 int (*ndo_stop)(struct net_device *dev);
1252 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1253 struct net_device *dev);
1254 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1255 struct net_device *dev,
1256 netdev_features_t features);
1257 u16 (*ndo_select_queue)(struct net_device *dev,
1258 struct sk_buff *skb,
1259 struct net_device *sb_dev,
1260 select_queue_fallback_t fallback);
1261 void (*ndo_change_rx_flags)(struct net_device *dev,
1263 void (*ndo_set_rx_mode)(struct net_device *dev);
1264 int (*ndo_set_mac_address)(struct net_device *dev,
1266 int (*ndo_validate_addr)(struct net_device *dev);
1267 int (*ndo_do_ioctl)(struct net_device *dev,
1268 struct ifreq *ifr, int cmd);
1269 int (*ndo_set_config)(struct net_device *dev,
1271 int (*ndo_change_mtu)(struct net_device *dev,
1273 int (*ndo_neigh_setup)(struct net_device *dev,
1274 struct neigh_parms *);
1275 void (*ndo_tx_timeout) (struct net_device *dev);
1277 void (*ndo_get_stats64)(struct net_device *dev,
1278 struct rtnl_link_stats64 *storage);
1279 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1280 int (*ndo_get_offload_stats)(int attr_id,
1281 const struct net_device *dev,
1283 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1285 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1286 __be16 proto, u16 vid);
1287 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1288 __be16 proto, u16 vid);
1289 #ifdef CONFIG_NET_POLL_CONTROLLER
1290 void (*ndo_poll_controller)(struct net_device *dev);
1291 int (*ndo_netpoll_setup)(struct net_device *dev,
1292 struct netpoll_info *info);
1293 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1295 int (*ndo_set_vf_mac)(struct net_device *dev,
1296 int queue, u8 *mac);
1297 int (*ndo_set_vf_vlan)(struct net_device *dev,
1298 int queue, u16 vlan,
1299 u8 qos, __be16 proto);
1300 int (*ndo_set_vf_rate)(struct net_device *dev,
1301 int vf, int min_tx_rate,
1303 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1304 int vf, bool setting);
1305 int (*ndo_set_vf_trust)(struct net_device *dev,
1306 int vf, bool setting);
1307 int (*ndo_get_vf_config)(struct net_device *dev,
1309 struct ifla_vf_info *ivf);
1310 int (*ndo_set_vf_link_state)(struct net_device *dev,
1311 int vf, int link_state);
1312 int (*ndo_get_vf_stats)(struct net_device *dev,
1314 struct ifla_vf_stats
1316 int (*ndo_set_vf_port)(struct net_device *dev,
1318 struct nlattr *port[]);
1319 int (*ndo_get_vf_port)(struct net_device *dev,
1320 int vf, struct sk_buff *skb);
1321 int (*ndo_set_vf_guid)(struct net_device *dev,
1324 int (*ndo_set_vf_rss_query_en)(
1325 struct net_device *dev,
1326 int vf, bool setting);
1327 int (*ndo_setup_tc)(struct net_device *dev,
1328 enum tc_setup_type type,
1330 #if IS_ENABLED(CONFIG_FCOE)
1331 int (*ndo_fcoe_enable)(struct net_device *dev);
1332 int (*ndo_fcoe_disable)(struct net_device *dev);
1333 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1335 struct scatterlist *sgl,
1337 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1339 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1341 struct scatterlist *sgl,
1343 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1344 struct netdev_fcoe_hbainfo *hbainfo);
1347 #if IS_ENABLED(CONFIG_LIBFCOE)
1348 #define NETDEV_FCOE_WWNN 0
1349 #define NETDEV_FCOE_WWPN 1
1350 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1351 u64 *wwn, int type);
1354 #ifdef CONFIG_RFS_ACCEL
1355 int (*ndo_rx_flow_steer)(struct net_device *dev,
1356 const struct sk_buff *skb,
1360 int (*ndo_add_slave)(struct net_device *dev,
1361 struct net_device *slave_dev,
1362 struct netlink_ext_ack *extack);
1363 int (*ndo_del_slave)(struct net_device *dev,
1364 struct net_device *slave_dev);
1365 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1366 netdev_features_t features);
1367 int (*ndo_set_features)(struct net_device *dev,
1368 netdev_features_t features);
1369 int (*ndo_neigh_construct)(struct net_device *dev,
1370 struct neighbour *n);
1371 void (*ndo_neigh_destroy)(struct net_device *dev,
1372 struct neighbour *n);
1374 int (*ndo_fdb_add)(struct ndmsg *ndm,
1375 struct nlattr *tb[],
1376 struct net_device *dev,
1377 const unsigned char *addr,
1380 int (*ndo_fdb_del)(struct ndmsg *ndm,
1381 struct nlattr *tb[],
1382 struct net_device *dev,
1383 const unsigned char *addr,
1385 int (*ndo_fdb_dump)(struct sk_buff *skb,
1386 struct netlink_callback *cb,
1387 struct net_device *dev,
1388 struct net_device *filter_dev,
1391 int (*ndo_bridge_setlink)(struct net_device *dev,
1392 struct nlmsghdr *nlh,
1394 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1396 struct net_device *dev,
1399 int (*ndo_bridge_dellink)(struct net_device *dev,
1400 struct nlmsghdr *nlh,
1402 int (*ndo_change_carrier)(struct net_device *dev,
1404 int (*ndo_get_phys_port_id)(struct net_device *dev,
1405 struct netdev_phys_item_id *ppid);
1406 int (*ndo_get_phys_port_name)(struct net_device *dev,
1407 char *name, size_t len);
1408 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1409 struct udp_tunnel_info *ti);
1410 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1411 struct udp_tunnel_info *ti);
1412 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1413 struct net_device *dev);
1414 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1417 int (*ndo_get_lock_subclass)(struct net_device *dev);
1418 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1421 int (*ndo_get_iflink)(const struct net_device *dev);
1422 int (*ndo_change_proto_down)(struct net_device *dev,
1424 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1425 struct sk_buff *skb);
1426 void (*ndo_set_rx_headroom)(struct net_device *dev,
1427 int needed_headroom);
1428 int (*ndo_bpf)(struct net_device *dev,
1429 struct netdev_bpf *bpf);
1430 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1431 struct xdp_frame **xdp,
1433 int (*ndo_xsk_async_xmit)(struct net_device *dev,
1438 * enum net_device_priv_flags - &struct net_device priv_flags
1440 * These are the &struct net_device, they are only set internally
1441 * by drivers and used in the kernel. These flags are invisible to
1442 * userspace; this means that the order of these flags can change
1443 * during any kernel release.
1445 * You should have a pretty good reason to be extending these flags.
1447 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1448 * @IFF_EBRIDGE: Ethernet bridging device
1449 * @IFF_BONDING: bonding master or slave
1450 * @IFF_ISATAP: ISATAP interface (RFC4214)
1451 * @IFF_WAN_HDLC: WAN HDLC device
1452 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1454 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1455 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1456 * @IFF_MACVLAN_PORT: device used as macvlan port
1457 * @IFF_BRIDGE_PORT: device used as bridge port
1458 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1459 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1460 * @IFF_UNICAST_FLT: Supports unicast filtering
1461 * @IFF_TEAM_PORT: device used as team port
1462 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1463 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1464 * change when it's running
1465 * @IFF_MACVLAN: Macvlan device
1466 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1467 * underlying stacked devices
1468 * @IFF_L3MDEV_MASTER: device is an L3 master device
1469 * @IFF_NO_QUEUE: device can run without qdisc attached
1470 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1471 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1472 * @IFF_TEAM: device is a team device
1473 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1474 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1475 * entity (i.e. the master device for bridged veth)
1476 * @IFF_MACSEC: device is a MACsec device
1477 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1478 * @IFF_FAILOVER: device is a failover master device
1479 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1481 enum netdev_priv_flags {
1482 IFF_802_1Q_VLAN = 1<<0,
1486 IFF_WAN_HDLC = 1<<4,
1487 IFF_XMIT_DST_RELEASE = 1<<5,
1488 IFF_DONT_BRIDGE = 1<<6,
1489 IFF_DISABLE_NETPOLL = 1<<7,
1490 IFF_MACVLAN_PORT = 1<<8,
1491 IFF_BRIDGE_PORT = 1<<9,
1492 IFF_OVS_DATAPATH = 1<<10,
1493 IFF_TX_SKB_SHARING = 1<<11,
1494 IFF_UNICAST_FLT = 1<<12,
1495 IFF_TEAM_PORT = 1<<13,
1496 IFF_SUPP_NOFCS = 1<<14,
1497 IFF_LIVE_ADDR_CHANGE = 1<<15,
1498 IFF_MACVLAN = 1<<16,
1499 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1500 IFF_L3MDEV_MASTER = 1<<18,
1501 IFF_NO_QUEUE = 1<<19,
1502 IFF_OPENVSWITCH = 1<<20,
1503 IFF_L3MDEV_SLAVE = 1<<21,
1505 IFF_RXFH_CONFIGURED = 1<<23,
1506 IFF_PHONY_HEADROOM = 1<<24,
1508 IFF_NO_RX_HANDLER = 1<<26,
1509 IFF_FAILOVER = 1<<27,
1510 IFF_FAILOVER_SLAVE = 1<<28,
1513 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1514 #define IFF_EBRIDGE IFF_EBRIDGE
1515 #define IFF_BONDING IFF_BONDING
1516 #define IFF_ISATAP IFF_ISATAP
1517 #define IFF_WAN_HDLC IFF_WAN_HDLC
1518 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1519 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1520 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1521 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1522 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1523 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1524 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1525 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1526 #define IFF_TEAM_PORT IFF_TEAM_PORT
1527 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1528 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1529 #define IFF_MACVLAN IFF_MACVLAN
1530 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1531 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1532 #define IFF_NO_QUEUE IFF_NO_QUEUE
1533 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1534 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1535 #define IFF_TEAM IFF_TEAM
1536 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1537 #define IFF_MACSEC IFF_MACSEC
1538 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1539 #define IFF_FAILOVER IFF_FAILOVER
1540 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1543 * struct net_device - The DEVICE structure.
1545 * Actually, this whole structure is a big mistake. It mixes I/O
1546 * data with strictly "high-level" data, and it has to know about
1547 * almost every data structure used in the INET module.
1549 * @name: This is the first field of the "visible" part of this structure
1550 * (i.e. as seen by users in the "Space.c" file). It is the name
1553 * @name_hlist: Device name hash chain, please keep it close to name[]
1554 * @ifalias: SNMP alias
1555 * @mem_end: Shared memory end
1556 * @mem_start: Shared memory start
1557 * @base_addr: Device I/O address
1558 * @irq: Device IRQ number
1560 * @state: Generic network queuing layer state, see netdev_state_t
1561 * @dev_list: The global list of network devices
1562 * @napi_list: List entry used for polling NAPI devices
1563 * @unreg_list: List entry when we are unregistering the
1564 * device; see the function unregister_netdev
1565 * @close_list: List entry used when we are closing the device
1566 * @ptype_all: Device-specific packet handlers for all protocols
1567 * @ptype_specific: Device-specific, protocol-specific packet handlers
1569 * @adj_list: Directly linked devices, like slaves for bonding
1570 * @features: Currently active device features
1571 * @hw_features: User-changeable features
1573 * @wanted_features: User-requested features
1574 * @vlan_features: Mask of features inheritable by VLAN devices
1576 * @hw_enc_features: Mask of features inherited by encapsulating devices
1577 * This field indicates what encapsulation
1578 * offloads the hardware is capable of doing,
1579 * and drivers will need to set them appropriately.
1581 * @mpls_features: Mask of features inheritable by MPLS
1583 * @ifindex: interface index
1584 * @group: The group the device belongs to
1586 * @stats: Statistics struct, which was left as a legacy, use
1587 * rtnl_link_stats64 instead
1589 * @rx_dropped: Dropped packets by core network,
1590 * do not use this in drivers
1591 * @tx_dropped: Dropped packets by core network,
1592 * do not use this in drivers
1593 * @rx_nohandler: nohandler dropped packets by core network on
1594 * inactive devices, do not use this in drivers
1595 * @carrier_up_count: Number of times the carrier has been up
1596 * @carrier_down_count: Number of times the carrier has been down
1598 * @wireless_handlers: List of functions to handle Wireless Extensions,
1600 * see <net/iw_handler.h> for details.
1601 * @wireless_data: Instance data managed by the core of wireless extensions
1603 * @netdev_ops: Includes several pointers to callbacks,
1604 * if one wants to override the ndo_*() functions
1605 * @ethtool_ops: Management operations
1606 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1607 * discovery handling. Necessary for e.g. 6LoWPAN.
1608 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1609 * of Layer 2 headers.
1611 * @flags: Interface flags (a la BSD)
1612 * @priv_flags: Like 'flags' but invisible to userspace,
1613 * see if.h for the definitions
1614 * @gflags: Global flags ( kept as legacy )
1615 * @padded: How much padding added by alloc_netdev()
1616 * @operstate: RFC2863 operstate
1617 * @link_mode: Mapping policy to operstate
1618 * @if_port: Selectable AUI, TP, ...
1620 * @mtu: Interface MTU value
1621 * @min_mtu: Interface Minimum MTU value
1622 * @max_mtu: Interface Maximum MTU value
1623 * @type: Interface hardware type
1624 * @hard_header_len: Maximum hardware header length.
1625 * @min_header_len: Minimum hardware header length
1627 * @needed_headroom: Extra headroom the hardware may need, but not in all
1628 * cases can this be guaranteed
1629 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1630 * cases can this be guaranteed. Some cases also use
1631 * LL_MAX_HEADER instead to allocate the skb
1633 * interface address info:
1635 * @perm_addr: Permanent hw address
1636 * @addr_assign_type: Hw address assignment type
1637 * @addr_len: Hardware address length
1638 * @neigh_priv_len: Used in neigh_alloc()
1639 * @dev_id: Used to differentiate devices that share
1640 * the same link layer address
1641 * @dev_port: Used to differentiate devices that share
1643 * @addr_list_lock: XXX: need comments on this one
1644 * @uc_promisc: Counter that indicates promiscuous mode
1645 * has been enabled due to the need to listen to
1646 * additional unicast addresses in a device that
1647 * does not implement ndo_set_rx_mode()
1648 * @uc: unicast mac addresses
1649 * @mc: multicast mac addresses
1650 * @dev_addrs: list of device hw addresses
1651 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1652 * @promiscuity: Number of times the NIC is told to work in
1653 * promiscuous mode; if it becomes 0 the NIC will
1654 * exit promiscuous mode
1655 * @allmulti: Counter, enables or disables allmulticast mode
1657 * @vlan_info: VLAN info
1658 * @dsa_ptr: dsa specific data
1659 * @tipc_ptr: TIPC specific data
1660 * @atalk_ptr: AppleTalk link
1661 * @ip_ptr: IPv4 specific data
1662 * @dn_ptr: DECnet specific data
1663 * @ip6_ptr: IPv6 specific data
1664 * @ax25_ptr: AX.25 specific data
1665 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1667 * @dev_addr: Hw address (before bcast,
1668 * because most packets are unicast)
1670 * @_rx: Array of RX queues
1671 * @num_rx_queues: Number of RX queues
1672 * allocated at register_netdev() time
1673 * @real_num_rx_queues: Number of RX queues currently active in device
1675 * @rx_handler: handler for received packets
1676 * @rx_handler_data: XXX: need comments on this one
1677 * @miniq_ingress: ingress/clsact qdisc specific data for
1678 * ingress processing
1679 * @ingress_queue: XXX: need comments on this one
1680 * @broadcast: hw bcast address
1682 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1683 * indexed by RX queue number. Assigned by driver.
1684 * This must only be set if the ndo_rx_flow_steer
1685 * operation is defined
1686 * @index_hlist: Device index hash chain
1688 * @_tx: Array of TX queues
1689 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1690 * @real_num_tx_queues: Number of TX queues currently active in device
1691 * @qdisc: Root qdisc from userspace point of view
1692 * @tx_queue_len: Max frames per queue allowed
1693 * @tx_global_lock: XXX: need comments on this one
1695 * @xps_maps: XXX: need comments on this one
1696 * @miniq_egress: clsact qdisc specific data for
1698 * @watchdog_timeo: Represents the timeout that is used by
1699 * the watchdog (see dev_watchdog())
1700 * @watchdog_timer: List of timers
1702 * @pcpu_refcnt: Number of references to this device
1703 * @todo_list: Delayed register/unregister
1704 * @link_watch_list: XXX: need comments on this one
1706 * @reg_state: Register/unregister state machine
1707 * @dismantle: Device is going to be freed
1708 * @rtnl_link_state: This enum represents the phases of creating
1711 * @needs_free_netdev: Should unregister perform free_netdev?
1712 * @priv_destructor: Called from unregister
1713 * @npinfo: XXX: need comments on this one
1714 * @nd_net: Network namespace this network device is inside
1716 * @ml_priv: Mid-layer private
1717 * @lstats: Loopback statistics
1718 * @tstats: Tunnel statistics
1719 * @dstats: Dummy statistics
1720 * @vstats: Virtual ethernet statistics
1725 * @dev: Class/net/name entry
1726 * @sysfs_groups: Space for optional device, statistics and wireless
1729 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1730 * @rtnl_link_ops: Rtnl_link_ops
1732 * @gso_max_size: Maximum size of generic segmentation offload
1733 * @gso_max_segs: Maximum number of segments that can be passed to the
1736 * @dcbnl_ops: Data Center Bridging netlink ops
1737 * @num_tc: Number of traffic classes in the net device
1738 * @tc_to_txq: XXX: need comments on this one
1739 * @prio_tc_map: XXX: need comments on this one
1741 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1743 * @priomap: XXX: need comments on this one
1744 * @phydev: Physical device may attach itself
1745 * for hardware timestamping
1746 * @sfp_bus: attached &struct sfp_bus structure.
1748 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1749 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1751 * @proto_down: protocol port state information can be sent to the
1752 * switch driver and used to set the phys state of the
1755 * @wol_enabled: Wake-on-LAN is enabled
1757 * FIXME: cleanup struct net_device such that network protocol info
1762 char name[IFNAMSIZ];
1763 struct hlist_node name_hlist;
1764 struct dev_ifalias __rcu *ifalias;
1766 * I/O specific fields
1767 * FIXME: Merge these and struct ifmap into one
1769 unsigned long mem_end;
1770 unsigned long mem_start;
1771 unsigned long base_addr;
1775 * Some hardware also needs these fields (state,dev_list,
1776 * napi_list,unreg_list,close_list) but they are not
1777 * part of the usual set specified in Space.c.
1780 unsigned long state;
1782 struct list_head dev_list;
1783 struct list_head napi_list;
1784 struct list_head unreg_list;
1785 struct list_head close_list;
1786 struct list_head ptype_all;
1787 struct list_head ptype_specific;
1790 struct list_head upper;
1791 struct list_head lower;
1794 netdev_features_t features;
1795 netdev_features_t hw_features;
1796 netdev_features_t wanted_features;
1797 netdev_features_t vlan_features;
1798 netdev_features_t hw_enc_features;
1799 netdev_features_t mpls_features;
1800 netdev_features_t gso_partial_features;
1805 struct net_device_stats stats;
1807 atomic_long_t rx_dropped;
1808 atomic_long_t tx_dropped;
1809 atomic_long_t rx_nohandler;
1811 /* Stats to monitor link on/off, flapping */
1812 atomic_t carrier_up_count;
1813 atomic_t carrier_down_count;
1815 #ifdef CONFIG_WIRELESS_EXT
1816 const struct iw_handler_def *wireless_handlers;
1817 struct iw_public_data *wireless_data;
1819 const struct net_device_ops *netdev_ops;
1820 const struct ethtool_ops *ethtool_ops;
1821 #ifdef CONFIG_NET_SWITCHDEV
1822 const struct switchdev_ops *switchdev_ops;
1824 #ifdef CONFIG_NET_L3_MASTER_DEV
1825 const struct l3mdev_ops *l3mdev_ops;
1827 #if IS_ENABLED(CONFIG_IPV6)
1828 const struct ndisc_ops *ndisc_ops;
1831 #ifdef CONFIG_XFRM_OFFLOAD
1832 const struct xfrmdev_ops *xfrmdev_ops;
1835 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1836 const struct tlsdev_ops *tlsdev_ops;
1839 const struct header_ops *header_ops;
1842 unsigned int priv_flags;
1844 unsigned short gflags;
1845 unsigned short padded;
1847 unsigned char operstate;
1848 unsigned char link_mode;
1850 unsigned char if_port;
1854 unsigned int min_mtu;
1855 unsigned int max_mtu;
1856 unsigned short type;
1857 unsigned short hard_header_len;
1858 unsigned char min_header_len;
1860 unsigned short needed_headroom;
1861 unsigned short needed_tailroom;
1863 /* Interface address info. */
1864 unsigned char perm_addr[MAX_ADDR_LEN];
1865 unsigned char addr_assign_type;
1866 unsigned char addr_len;
1867 unsigned short neigh_priv_len;
1868 unsigned short dev_id;
1869 unsigned short dev_port;
1870 spinlock_t addr_list_lock;
1871 unsigned char name_assign_type;
1873 struct netdev_hw_addr_list uc;
1874 struct netdev_hw_addr_list mc;
1875 struct netdev_hw_addr_list dev_addrs;
1878 struct kset *queues_kset;
1880 unsigned int promiscuity;
1881 unsigned int allmulti;
1884 /* Protocol-specific pointers */
1886 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1887 struct vlan_info __rcu *vlan_info;
1889 #if IS_ENABLED(CONFIG_NET_DSA)
1890 struct dsa_port *dsa_ptr;
1892 #if IS_ENABLED(CONFIG_TIPC)
1893 struct tipc_bearer __rcu *tipc_ptr;
1895 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1898 struct in_device __rcu *ip_ptr;
1899 #if IS_ENABLED(CONFIG_DECNET)
1900 struct dn_dev __rcu *dn_ptr;
1902 struct inet6_dev __rcu *ip6_ptr;
1903 #if IS_ENABLED(CONFIG_AX25)
1906 struct wireless_dev *ieee80211_ptr;
1907 struct wpan_dev *ieee802154_ptr;
1908 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1909 struct mpls_dev __rcu *mpls_ptr;
1913 * Cache lines mostly used on receive path (including eth_type_trans())
1915 /* Interface address info used in eth_type_trans() */
1916 unsigned char *dev_addr;
1918 struct netdev_rx_queue *_rx;
1919 unsigned int num_rx_queues;
1920 unsigned int real_num_rx_queues;
1922 struct bpf_prog __rcu *xdp_prog;
1923 unsigned long gro_flush_timeout;
1924 rx_handler_func_t __rcu *rx_handler;
1925 void __rcu *rx_handler_data;
1927 #ifdef CONFIG_NET_CLS_ACT
1928 struct mini_Qdisc __rcu *miniq_ingress;
1930 struct netdev_queue __rcu *ingress_queue;
1931 #ifdef CONFIG_NETFILTER_INGRESS
1932 struct nf_hook_entries __rcu *nf_hooks_ingress;
1935 unsigned char broadcast[MAX_ADDR_LEN];
1936 #ifdef CONFIG_RFS_ACCEL
1937 struct cpu_rmap *rx_cpu_rmap;
1939 struct hlist_node index_hlist;
1942 * Cache lines mostly used on transmit path
1944 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1945 unsigned int num_tx_queues;
1946 unsigned int real_num_tx_queues;
1947 struct Qdisc *qdisc;
1948 #ifdef CONFIG_NET_SCHED
1949 DECLARE_HASHTABLE (qdisc_hash, 4);
1951 unsigned int tx_queue_len;
1952 spinlock_t tx_global_lock;
1956 struct xps_dev_maps __rcu *xps_cpus_map;
1957 struct xps_dev_maps __rcu *xps_rxqs_map;
1959 #ifdef CONFIG_NET_CLS_ACT
1960 struct mini_Qdisc __rcu *miniq_egress;
1963 /* These may be needed for future network-power-down code. */
1964 struct timer_list watchdog_timer;
1966 int __percpu *pcpu_refcnt;
1967 struct list_head todo_list;
1969 struct list_head link_watch_list;
1971 enum { NETREG_UNINITIALIZED=0,
1972 NETREG_REGISTERED, /* completed register_netdevice */
1973 NETREG_UNREGISTERING, /* called unregister_netdevice */
1974 NETREG_UNREGISTERED, /* completed unregister todo */
1975 NETREG_RELEASED, /* called free_netdev */
1976 NETREG_DUMMY, /* dummy device for NAPI poll */
1982 RTNL_LINK_INITIALIZED,
1983 RTNL_LINK_INITIALIZING,
1984 } rtnl_link_state:16;
1986 bool needs_free_netdev;
1987 void (*priv_destructor)(struct net_device *dev);
1989 #ifdef CONFIG_NETPOLL
1990 struct netpoll_info __rcu *npinfo;
1993 possible_net_t nd_net;
1995 /* mid-layer private */
1998 struct pcpu_lstats __percpu *lstats;
1999 struct pcpu_sw_netstats __percpu *tstats;
2000 struct pcpu_dstats __percpu *dstats;
2003 #if IS_ENABLED(CONFIG_GARP)
2004 struct garp_port __rcu *garp_port;
2006 #if IS_ENABLED(CONFIG_MRP)
2007 struct mrp_port __rcu *mrp_port;
2011 const struct attribute_group *sysfs_groups[4];
2012 const struct attribute_group *sysfs_rx_queue_group;
2014 const struct rtnl_link_ops *rtnl_link_ops;
2016 /* for setting kernel sock attribute on TCP connection setup */
2017 #define GSO_MAX_SIZE 65536
2018 unsigned int gso_max_size;
2019 #define GSO_MAX_SEGS 65535
2023 const struct dcbnl_rtnl_ops *dcbnl_ops;
2026 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2027 u8 prio_tc_map[TC_BITMASK + 1];
2029 #if IS_ENABLED(CONFIG_FCOE)
2030 unsigned int fcoe_ddp_xid;
2032 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2033 struct netprio_map __rcu *priomap;
2035 struct phy_device *phydev;
2036 struct sfp_bus *sfp_bus;
2037 struct lock_class_key *qdisc_tx_busylock;
2038 struct lock_class_key *qdisc_running_key;
2040 unsigned wol_enabled:1;
2042 #define to_net_dev(d) container_of(d, struct net_device, dev)
2044 static inline bool netif_elide_gro(const struct net_device *dev)
2046 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2051 #define NETDEV_ALIGN 32
2054 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2056 return dev->prio_tc_map[prio & TC_BITMASK];
2060 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2062 if (tc >= dev->num_tc)
2065 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2069 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2070 void netdev_reset_tc(struct net_device *dev);
2071 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2072 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2075 int netdev_get_num_tc(struct net_device *dev)
2080 void netdev_unbind_sb_channel(struct net_device *dev,
2081 struct net_device *sb_dev);
2082 int netdev_bind_sb_channel_queue(struct net_device *dev,
2083 struct net_device *sb_dev,
2084 u8 tc, u16 count, u16 offset);
2085 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2086 static inline int netdev_get_sb_channel(struct net_device *dev)
2088 return max_t(int, -dev->num_tc, 0);
2092 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2095 return &dev->_tx[index];
2098 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2099 const struct sk_buff *skb)
2101 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2104 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2105 void (*f)(struct net_device *,
2106 struct netdev_queue *,
2112 for (i = 0; i < dev->num_tx_queues; i++)
2113 f(dev, &dev->_tx[i], arg);
2116 #define netdev_lockdep_set_classes(dev) \
2118 static struct lock_class_key qdisc_tx_busylock_key; \
2119 static struct lock_class_key qdisc_running_key; \
2120 static struct lock_class_key qdisc_xmit_lock_key; \
2121 static struct lock_class_key dev_addr_list_lock_key; \
2124 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2125 (dev)->qdisc_running_key = &qdisc_running_key; \
2126 lockdep_set_class(&(dev)->addr_list_lock, \
2127 &dev_addr_list_lock_key); \
2128 for (i = 0; i < (dev)->num_tx_queues; i++) \
2129 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2130 &qdisc_xmit_lock_key); \
2133 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
2134 struct sk_buff *skb,
2135 struct net_device *sb_dev);
2137 /* returns the headroom that the master device needs to take in account
2138 * when forwarding to this dev
2140 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2142 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2145 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2147 if (dev->netdev_ops->ndo_set_rx_headroom)
2148 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2151 /* set the device rx headroom to the dev's default */
2152 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2154 netdev_set_rx_headroom(dev, -1);
2158 * Net namespace inlines
2161 struct net *dev_net(const struct net_device *dev)
2163 return read_pnet(&dev->nd_net);
2167 void dev_net_set(struct net_device *dev, struct net *net)
2169 write_pnet(&dev->nd_net, net);
2173 * netdev_priv - access network device private data
2174 * @dev: network device
2176 * Get network device private data
2178 static inline void *netdev_priv(const struct net_device *dev)
2180 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2183 /* Set the sysfs physical device reference for the network logical device
2184 * if set prior to registration will cause a symlink during initialization.
2186 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2188 /* Set the sysfs device type for the network logical device to allow
2189 * fine-grained identification of different network device types. For
2190 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2192 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2194 /* Default NAPI poll() weight
2195 * Device drivers are strongly advised to not use bigger value
2197 #define NAPI_POLL_WEIGHT 64
2200 * netif_napi_add - initialize a NAPI context
2201 * @dev: network device
2202 * @napi: NAPI context
2203 * @poll: polling function
2204 * @weight: default weight
2206 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2207 * *any* of the other NAPI-related functions.
2209 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2210 int (*poll)(struct napi_struct *, int), int weight);
2213 * netif_tx_napi_add - initialize a NAPI context
2214 * @dev: network device
2215 * @napi: NAPI context
2216 * @poll: polling function
2217 * @weight: default weight
2219 * This variant of netif_napi_add() should be used from drivers using NAPI
2220 * to exclusively poll a TX queue.
2221 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2223 static inline void netif_tx_napi_add(struct net_device *dev,
2224 struct napi_struct *napi,
2225 int (*poll)(struct napi_struct *, int),
2228 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2229 netif_napi_add(dev, napi, poll, weight);
2233 * netif_napi_del - remove a NAPI context
2234 * @napi: NAPI context
2236 * netif_napi_del() removes a NAPI context from the network device NAPI list
2238 void netif_napi_del(struct napi_struct *napi);
2240 struct napi_gro_cb {
2241 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2244 /* Length of frag0. */
2245 unsigned int frag0_len;
2247 /* This indicates where we are processing relative to skb->data. */
2250 /* This is non-zero if the packet cannot be merged with the new skb. */
2253 /* Save the IP ID here and check when we get to the transport layer */
2256 /* Number of segments aggregated. */
2259 /* Start offset for remote checksum offload */
2260 u16 gro_remcsum_start;
2262 /* jiffies when first packet was created/queued */
2265 /* Used in ipv6_gro_receive() and foo-over-udp */
2268 /* This is non-zero if the packet may be of the same flow. */
2271 /* Used in tunnel GRO receive */
2274 /* GRO checksum is valid */
2277 /* Number of checksums via CHECKSUM_UNNECESSARY */
2282 #define NAPI_GRO_FREE 1
2283 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2285 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2288 /* Used in GRE, set in fou/gue_gro_receive */
2291 /* Used to determine if flush_id can be ignored */
2294 /* Number of gro_receive callbacks this packet already went through */
2295 u8 recursion_counter:4;
2299 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2302 /* used in skb_gro_receive() slow path */
2303 struct sk_buff *last;
2306 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2308 #define GRO_RECURSION_LIMIT 15
2309 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2311 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2314 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2315 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2316 struct list_head *head,
2317 struct sk_buff *skb)
2319 if (unlikely(gro_recursion_inc_test(skb))) {
2320 NAPI_GRO_CB(skb)->flush |= 1;
2324 return cb(head, skb);
2327 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2329 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2331 struct list_head *head,
2332 struct sk_buff *skb)
2334 if (unlikely(gro_recursion_inc_test(skb))) {
2335 NAPI_GRO_CB(skb)->flush |= 1;
2339 return cb(sk, head, skb);
2342 struct packet_type {
2343 __be16 type; /* This is really htons(ether_type). */
2344 bool ignore_outgoing;
2345 struct net_device *dev; /* NULL is wildcarded here */
2346 int (*func) (struct sk_buff *,
2347 struct net_device *,
2348 struct packet_type *,
2349 struct net_device *);
2350 void (*list_func) (struct list_head *,
2351 struct packet_type *,
2352 struct net_device *);
2353 bool (*id_match)(struct packet_type *ptype,
2355 void *af_packet_priv;
2356 struct list_head list;
2359 struct offload_callbacks {
2360 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2361 netdev_features_t features);
2362 struct sk_buff *(*gro_receive)(struct list_head *head,
2363 struct sk_buff *skb);
2364 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2367 struct packet_offload {
2368 __be16 type; /* This is really htons(ether_type). */
2370 struct offload_callbacks callbacks;
2371 struct list_head list;
2374 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2375 struct pcpu_sw_netstats {
2380 struct u64_stats_sync syncp;
2381 } __aligned(4 * sizeof(u64));
2383 struct pcpu_lstats {
2386 struct u64_stats_sync syncp;
2387 } __aligned(2 * sizeof(u64));
2389 #define __netdev_alloc_pcpu_stats(type, gfp) \
2391 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2394 for_each_possible_cpu(__cpu) { \
2395 typeof(type) *stat; \
2396 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2397 u64_stats_init(&stat->syncp); \
2403 #define netdev_alloc_pcpu_stats(type) \
2404 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2406 enum netdev_lag_tx_type {
2407 NETDEV_LAG_TX_TYPE_UNKNOWN,
2408 NETDEV_LAG_TX_TYPE_RANDOM,
2409 NETDEV_LAG_TX_TYPE_BROADCAST,
2410 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2411 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2412 NETDEV_LAG_TX_TYPE_HASH,
2415 enum netdev_lag_hash {
2416 NETDEV_LAG_HASH_NONE,
2418 NETDEV_LAG_HASH_L34,
2419 NETDEV_LAG_HASH_L23,
2420 NETDEV_LAG_HASH_E23,
2421 NETDEV_LAG_HASH_E34,
2422 NETDEV_LAG_HASH_UNKNOWN,
2425 struct netdev_lag_upper_info {
2426 enum netdev_lag_tx_type tx_type;
2427 enum netdev_lag_hash hash_type;
2430 struct netdev_lag_lower_state_info {
2435 #include <linux/notifier.h>
2437 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2438 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2442 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2444 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2445 detected a hardware crash and restarted
2446 - we can use this eg to kick tcp sessions
2448 NETDEV_CHANGE, /* Notify device state change */
2451 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2456 NETDEV_BONDING_FAILOVER,
2458 NETDEV_PRE_TYPE_CHANGE,
2459 NETDEV_POST_TYPE_CHANGE,
2462 NETDEV_NOTIFY_PEERS,
2466 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2467 NETDEV_CHANGEINFODATA,
2468 NETDEV_BONDING_INFO,
2469 NETDEV_PRECHANGEUPPER,
2470 NETDEV_CHANGELOWERSTATE,
2471 NETDEV_UDP_TUNNEL_PUSH_INFO,
2472 NETDEV_UDP_TUNNEL_DROP_INFO,
2473 NETDEV_CHANGE_TX_QUEUE_LEN,
2474 NETDEV_CVLAN_FILTER_PUSH_INFO,
2475 NETDEV_CVLAN_FILTER_DROP_INFO,
2476 NETDEV_SVLAN_FILTER_PUSH_INFO,
2477 NETDEV_SVLAN_FILTER_DROP_INFO,
2479 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2481 int register_netdevice_notifier(struct notifier_block *nb);
2482 int unregister_netdevice_notifier(struct notifier_block *nb);
2484 struct netdev_notifier_info {
2485 struct net_device *dev;
2486 struct netlink_ext_ack *extack;
2489 struct netdev_notifier_info_ext {
2490 struct netdev_notifier_info info; /* must be first */
2496 struct netdev_notifier_change_info {
2497 struct netdev_notifier_info info; /* must be first */
2498 unsigned int flags_changed;
2501 struct netdev_notifier_changeupper_info {
2502 struct netdev_notifier_info info; /* must be first */
2503 struct net_device *upper_dev; /* new upper dev */
2504 bool master; /* is upper dev master */
2505 bool linking; /* is the notification for link or unlink */
2506 void *upper_info; /* upper dev info */
2509 struct netdev_notifier_changelowerstate_info {
2510 struct netdev_notifier_info info; /* must be first */
2511 void *lower_state_info; /* is lower dev state */
2514 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2515 struct net_device *dev)
2518 info->extack = NULL;
2521 static inline struct net_device *
2522 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2527 static inline struct netlink_ext_ack *
2528 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2530 return info->extack;
2533 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2536 extern rwlock_t dev_base_lock; /* Device list lock */
2538 #define for_each_netdev(net, d) \
2539 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2540 #define for_each_netdev_reverse(net, d) \
2541 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2542 #define for_each_netdev_rcu(net, d) \
2543 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2544 #define for_each_netdev_safe(net, d, n) \
2545 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2546 #define for_each_netdev_continue(net, d) \
2547 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2548 #define for_each_netdev_continue_rcu(net, d) \
2549 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2550 #define for_each_netdev_in_bond_rcu(bond, slave) \
2551 for_each_netdev_rcu(&init_net, slave) \
2552 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2553 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2555 static inline struct net_device *next_net_device(struct net_device *dev)
2557 struct list_head *lh;
2561 lh = dev->dev_list.next;
2562 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2565 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2567 struct list_head *lh;
2571 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2572 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2575 static inline struct net_device *first_net_device(struct net *net)
2577 return list_empty(&net->dev_base_head) ? NULL :
2578 net_device_entry(net->dev_base_head.next);
2581 static inline struct net_device *first_net_device_rcu(struct net *net)
2583 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2585 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2588 int netdev_boot_setup_check(struct net_device *dev);
2589 unsigned long netdev_boot_base(const char *prefix, int unit);
2590 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2591 const char *hwaddr);
2592 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2593 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2594 void dev_add_pack(struct packet_type *pt);
2595 void dev_remove_pack(struct packet_type *pt);
2596 void __dev_remove_pack(struct packet_type *pt);
2597 void dev_add_offload(struct packet_offload *po);
2598 void dev_remove_offload(struct packet_offload *po);
2600 int dev_get_iflink(const struct net_device *dev);
2601 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2602 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2603 unsigned short mask);
2604 struct net_device *dev_get_by_name(struct net *net, const char *name);
2605 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2606 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2607 int dev_alloc_name(struct net_device *dev, const char *name);
2608 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2609 void dev_close(struct net_device *dev);
2610 void dev_close_many(struct list_head *head, bool unlink);
2611 void dev_disable_lro(struct net_device *dev);
2612 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2613 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2614 struct net_device *sb_dev,
2615 select_queue_fallback_t fallback);
2616 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2617 struct net_device *sb_dev,
2618 select_queue_fallback_t fallback);
2619 int dev_queue_xmit(struct sk_buff *skb);
2620 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2621 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2622 int register_netdevice(struct net_device *dev);
2623 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2624 void unregister_netdevice_many(struct list_head *head);
2625 static inline void unregister_netdevice(struct net_device *dev)
2627 unregister_netdevice_queue(dev, NULL);
2630 int netdev_refcnt_read(const struct net_device *dev);
2631 void free_netdev(struct net_device *dev);
2632 void netdev_freemem(struct net_device *dev);
2633 void synchronize_net(void);
2634 int init_dummy_netdev(struct net_device *dev);
2636 DECLARE_PER_CPU(int, xmit_recursion);
2637 #define XMIT_RECURSION_LIMIT 10
2639 static inline int dev_recursion_level(void)
2641 return this_cpu_read(xmit_recursion);
2644 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2645 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2646 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2647 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2648 int netdev_get_name(struct net *net, char *name, int ifindex);
2649 int dev_restart(struct net_device *dev);
2650 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2652 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2654 return NAPI_GRO_CB(skb)->data_offset;
2657 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2659 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2662 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2664 NAPI_GRO_CB(skb)->data_offset += len;
2667 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2668 unsigned int offset)
2670 return NAPI_GRO_CB(skb)->frag0 + offset;
2673 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2675 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2678 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2680 NAPI_GRO_CB(skb)->frag0 = NULL;
2681 NAPI_GRO_CB(skb)->frag0_len = 0;
2684 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2685 unsigned int offset)
2687 if (!pskb_may_pull(skb, hlen))
2690 skb_gro_frag0_invalidate(skb);
2691 return skb->data + offset;
2694 static inline void *skb_gro_network_header(struct sk_buff *skb)
2696 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2697 skb_network_offset(skb);
2700 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2701 const void *start, unsigned int len)
2703 if (NAPI_GRO_CB(skb)->csum_valid)
2704 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2705 csum_partial(start, len, 0));
2708 /* GRO checksum functions. These are logical equivalents of the normal
2709 * checksum functions (in skbuff.h) except that they operate on the GRO
2710 * offsets and fields in sk_buff.
2713 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2715 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2717 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2720 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2724 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2725 skb_checksum_start_offset(skb) <
2726 skb_gro_offset(skb)) &&
2727 !skb_at_gro_remcsum_start(skb) &&
2728 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2729 (!zero_okay || check));
2732 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2735 if (NAPI_GRO_CB(skb)->csum_valid &&
2736 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2739 NAPI_GRO_CB(skb)->csum = psum;
2741 return __skb_gro_checksum_complete(skb);
2744 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2746 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2747 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2748 NAPI_GRO_CB(skb)->csum_cnt--;
2750 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2751 * verified a new top level checksum or an encapsulated one
2752 * during GRO. This saves work if we fallback to normal path.
2754 __skb_incr_checksum_unnecessary(skb);
2758 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2761 __sum16 __ret = 0; \
2762 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2763 __ret = __skb_gro_checksum_validate_complete(skb, \
2764 compute_pseudo(skb, proto)); \
2766 skb_gro_incr_csum_unnecessary(skb); \
2770 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2771 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2773 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2775 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2777 #define skb_gro_checksum_simple_validate(skb) \
2778 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2780 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2782 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2783 !NAPI_GRO_CB(skb)->csum_valid);
2786 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2787 __sum16 check, __wsum pseudo)
2789 NAPI_GRO_CB(skb)->csum = ~pseudo;
2790 NAPI_GRO_CB(skb)->csum_valid = 1;
2793 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2795 if (__skb_gro_checksum_convert_check(skb)) \
2796 __skb_gro_checksum_convert(skb, check, \
2797 compute_pseudo(skb, proto)); \
2800 struct gro_remcsum {
2805 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2811 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2812 unsigned int off, size_t hdrlen,
2813 int start, int offset,
2814 struct gro_remcsum *grc,
2818 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2820 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2823 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2827 ptr = skb_gro_header_fast(skb, off);
2828 if (skb_gro_header_hard(skb, off + plen)) {
2829 ptr = skb_gro_header_slow(skb, off + plen, off);
2834 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2837 /* Adjust skb->csum since we changed the packet */
2838 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2840 grc->offset = off + hdrlen + offset;
2846 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2847 struct gro_remcsum *grc)
2850 size_t plen = grc->offset + sizeof(u16);
2855 ptr = skb_gro_header_fast(skb, grc->offset);
2856 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2857 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2862 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2865 #ifdef CONFIG_XFRM_OFFLOAD
2866 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2868 if (PTR_ERR(pp) != -EINPROGRESS)
2869 NAPI_GRO_CB(skb)->flush |= flush;
2871 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2874 struct gro_remcsum *grc)
2876 if (PTR_ERR(pp) != -EINPROGRESS) {
2877 NAPI_GRO_CB(skb)->flush |= flush;
2878 skb_gro_remcsum_cleanup(skb, grc);
2879 skb->remcsum_offload = 0;
2883 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2885 NAPI_GRO_CB(skb)->flush |= flush;
2887 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2890 struct gro_remcsum *grc)
2892 NAPI_GRO_CB(skb)->flush |= flush;
2893 skb_gro_remcsum_cleanup(skb, grc);
2894 skb->remcsum_offload = 0;
2898 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2899 unsigned short type,
2900 const void *daddr, const void *saddr,
2903 if (!dev->header_ops || !dev->header_ops->create)
2906 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2909 static inline int dev_parse_header(const struct sk_buff *skb,
2910 unsigned char *haddr)
2912 const struct net_device *dev = skb->dev;
2914 if (!dev->header_ops || !dev->header_ops->parse)
2916 return dev->header_ops->parse(skb, haddr);
2919 /* ll_header must have at least hard_header_len allocated */
2920 static inline bool dev_validate_header(const struct net_device *dev,
2921 char *ll_header, int len)
2923 if (likely(len >= dev->hard_header_len))
2925 if (len < dev->min_header_len)
2928 if (capable(CAP_SYS_RAWIO)) {
2929 memset(ll_header + len, 0, dev->hard_header_len - len);
2933 if (dev->header_ops && dev->header_ops->validate)
2934 return dev->header_ops->validate(ll_header, len);
2939 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
2941 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2942 static inline int unregister_gifconf(unsigned int family)
2944 return register_gifconf(family, NULL);
2947 #ifdef CONFIG_NET_FLOW_LIMIT
2948 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2949 struct sd_flow_limit {
2951 unsigned int num_buckets;
2952 unsigned int history_head;
2953 u16 history[FLOW_LIMIT_HISTORY];
2957 extern int netdev_flow_limit_table_len;
2958 #endif /* CONFIG_NET_FLOW_LIMIT */
2961 * Incoming packets are placed on per-CPU queues
2963 struct softnet_data {
2964 struct list_head poll_list;
2965 struct sk_buff_head process_queue;
2968 unsigned int processed;
2969 unsigned int time_squeeze;
2970 unsigned int received_rps;
2972 struct softnet_data *rps_ipi_list;
2974 #ifdef CONFIG_NET_FLOW_LIMIT
2975 struct sd_flow_limit __rcu *flow_limit;
2977 struct Qdisc *output_queue;
2978 struct Qdisc **output_queue_tailp;
2979 struct sk_buff *completion_queue;
2980 #ifdef CONFIG_XFRM_OFFLOAD
2981 struct sk_buff_head xfrm_backlog;
2984 /* input_queue_head should be written by cpu owning this struct,
2985 * and only read by other cpus. Worth using a cache line.
2987 unsigned int input_queue_head ____cacheline_aligned_in_smp;
2989 /* Elements below can be accessed between CPUs for RPS/RFS */
2990 call_single_data_t csd ____cacheline_aligned_in_smp;
2991 struct softnet_data *rps_ipi_next;
2993 unsigned int input_queue_tail;
2995 unsigned int dropped;
2996 struct sk_buff_head input_pkt_queue;
2997 struct napi_struct backlog;
3001 static inline void input_queue_head_incr(struct softnet_data *sd)
3004 sd->input_queue_head++;
3008 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3009 unsigned int *qtail)
3012 *qtail = ++sd->input_queue_tail;
3016 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3018 void __netif_schedule(struct Qdisc *q);
3019 void netif_schedule_queue(struct netdev_queue *txq);
3021 static inline void netif_tx_schedule_all(struct net_device *dev)
3025 for (i = 0; i < dev->num_tx_queues; i++)
3026 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3029 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3031 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3035 * netif_start_queue - allow transmit
3036 * @dev: network device
3038 * Allow upper layers to call the device hard_start_xmit routine.
3040 static inline void netif_start_queue(struct net_device *dev)
3042 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3045 static inline void netif_tx_start_all_queues(struct net_device *dev)
3049 for (i = 0; i < dev->num_tx_queues; i++) {
3050 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3051 netif_tx_start_queue(txq);
3055 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3058 * netif_wake_queue - restart transmit
3059 * @dev: network device
3061 * Allow upper layers to call the device hard_start_xmit routine.
3062 * Used for flow control when transmit resources are available.
3064 static inline void netif_wake_queue(struct net_device *dev)
3066 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3069 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3073 for (i = 0; i < dev->num_tx_queues; i++) {
3074 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3075 netif_tx_wake_queue(txq);
3079 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3081 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3085 * netif_stop_queue - stop transmitted packets
3086 * @dev: network device
3088 * Stop upper layers calling the device hard_start_xmit routine.
3089 * Used for flow control when transmit resources are unavailable.
3091 static inline void netif_stop_queue(struct net_device *dev)
3093 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3096 void netif_tx_stop_all_queues(struct net_device *dev);
3098 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3100 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3104 * netif_queue_stopped - test if transmit queue is flowblocked
3105 * @dev: network device
3107 * Test if transmit queue on device is currently unable to send.
3109 static inline bool netif_queue_stopped(const struct net_device *dev)
3111 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3114 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3116 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3120 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3122 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3126 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3128 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3132 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3133 * @dev_queue: pointer to transmit queue
3135 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3136 * to give appropriate hint to the CPU.
3138 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3141 prefetchw(&dev_queue->dql.num_queued);
3146 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3147 * @dev_queue: pointer to transmit queue
3149 * BQL enabled drivers might use this helper in their TX completion path,
3150 * to give appropriate hint to the CPU.
3152 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3155 prefetchw(&dev_queue->dql.limit);
3159 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3163 dql_queued(&dev_queue->dql, bytes);
3165 if (likely(dql_avail(&dev_queue->dql) >= 0))
3168 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3171 * The XOFF flag must be set before checking the dql_avail below,
3172 * because in netdev_tx_completed_queue we update the dql_completed
3173 * before checking the XOFF flag.
3177 /* check again in case another CPU has just made room avail */
3178 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3179 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3183 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3184 * that they should not test BQL status themselves.
3185 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3187 * Returns true if the doorbell must be used to kick the NIC.
3189 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3195 dql_queued(&dev_queue->dql, bytes);
3197 return netif_tx_queue_stopped(dev_queue);
3199 netdev_tx_sent_queue(dev_queue, bytes);
3204 * netdev_sent_queue - report the number of bytes queued to hardware
3205 * @dev: network device
3206 * @bytes: number of bytes queued to the hardware device queue
3208 * Report the number of bytes queued for sending/completion to the network
3209 * device hardware queue. @bytes should be a good approximation and should
3210 * exactly match netdev_completed_queue() @bytes
3212 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3214 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3217 static inline bool __netdev_sent_queue(struct net_device *dev,
3221 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3225 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3226 unsigned int pkts, unsigned int bytes)
3229 if (unlikely(!bytes))
3232 dql_completed(&dev_queue->dql, bytes);
3235 * Without the memory barrier there is a small possiblity that
3236 * netdev_tx_sent_queue will miss the update and cause the queue to
3237 * be stopped forever
3241 if (dql_avail(&dev_queue->dql) < 0)
3244 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3245 netif_schedule_queue(dev_queue);
3250 * netdev_completed_queue - report bytes and packets completed by device
3251 * @dev: network device
3252 * @pkts: actual number of packets sent over the medium
3253 * @bytes: actual number of bytes sent over the medium
3255 * Report the number of bytes and packets transmitted by the network device
3256 * hardware queue over the physical medium, @bytes must exactly match the
3257 * @bytes amount passed to netdev_sent_queue()
3259 static inline void netdev_completed_queue(struct net_device *dev,
3260 unsigned int pkts, unsigned int bytes)
3262 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3265 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3268 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3274 * netdev_reset_queue - reset the packets and bytes count of a network device
3275 * @dev_queue: network device
3277 * Reset the bytes and packet count of a network device and clear the
3278 * software flow control OFF bit for this network device
3280 static inline void netdev_reset_queue(struct net_device *dev_queue)
3282 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3286 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3287 * @dev: network device
3288 * @queue_index: given tx queue index
3290 * Returns 0 if given tx queue index >= number of device tx queues,
3291 * otherwise returns the originally passed tx queue index.
3293 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3295 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3296 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3297 dev->name, queue_index,
3298 dev->real_num_tx_queues);
3306 * netif_running - test if up
3307 * @dev: network device
3309 * Test if the device has been brought up.
3311 static inline bool netif_running(const struct net_device *dev)
3313 return test_bit(__LINK_STATE_START, &dev->state);
3317 * Routines to manage the subqueues on a device. We only need start,
3318 * stop, and a check if it's stopped. All other device management is
3319 * done at the overall netdevice level.
3320 * Also test the device if we're multiqueue.
3324 * netif_start_subqueue - allow sending packets on subqueue
3325 * @dev: network device
3326 * @queue_index: sub queue index
3328 * Start individual transmit queue of a device with multiple transmit queues.
3330 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3332 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3334 netif_tx_start_queue(txq);
3338 * netif_stop_subqueue - stop sending packets on subqueue
3339 * @dev: network device
3340 * @queue_index: sub queue index
3342 * Stop individual transmit queue of a device with multiple transmit queues.
3344 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3346 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3347 netif_tx_stop_queue(txq);
3351 * netif_subqueue_stopped - test status of subqueue
3352 * @dev: network device
3353 * @queue_index: sub queue index
3355 * Check individual transmit queue of a device with multiple transmit queues.
3357 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3360 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3362 return netif_tx_queue_stopped(txq);
3365 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3366 struct sk_buff *skb)
3368 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3372 * netif_wake_subqueue - allow sending packets on subqueue
3373 * @dev: network device
3374 * @queue_index: sub queue index
3376 * Resume individual transmit queue of a device with multiple transmit queues.
3378 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3380 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3382 netif_tx_wake_queue(txq);
3386 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3388 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3389 u16 index, bool is_rxqs_map);
3392 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3393 * @j: CPU/Rx queue index
3394 * @mask: bitmask of all cpus/rx queues
3395 * @nr_bits: number of bits in the bitmask
3397 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3399 static inline bool netif_attr_test_mask(unsigned long j,
3400 const unsigned long *mask,
3401 unsigned int nr_bits)
3403 cpu_max_bits_warn(j, nr_bits);
3404 return test_bit(j, mask);
3408 * netif_attr_test_online - Test for online CPU/Rx queue
3409 * @j: CPU/Rx queue index
3410 * @online_mask: bitmask for CPUs/Rx queues that are online
3411 * @nr_bits: number of bits in the bitmask
3413 * Returns true if a CPU/Rx queue is online.
3415 static inline bool netif_attr_test_online(unsigned long j,
3416 const unsigned long *online_mask,
3417 unsigned int nr_bits)
3419 cpu_max_bits_warn(j, nr_bits);
3422 return test_bit(j, online_mask);
3424 return (j < nr_bits);
3428 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3429 * @n: CPU/Rx queue index
3430 * @srcp: the cpumask/Rx queue mask pointer
3431 * @nr_bits: number of bits in the bitmask
3433 * Returns >= nr_bits if no further CPUs/Rx queues set.
3435 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3436 unsigned int nr_bits)
3438 /* -1 is a legal arg here. */
3440 cpu_max_bits_warn(n, nr_bits);
3443 return find_next_bit(srcp, nr_bits, n + 1);
3449 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3450 * @n: CPU/Rx queue index
3451 * @src1p: the first CPUs/Rx queues mask pointer
3452 * @src2p: the second CPUs/Rx queues mask pointer
3453 * @nr_bits: number of bits in the bitmask
3455 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3457 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3458 const unsigned long *src2p,
3459 unsigned int nr_bits)
3461 /* -1 is a legal arg here. */
3463 cpu_max_bits_warn(n, nr_bits);
3466 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3468 return find_next_bit(src1p, nr_bits, n + 1);
3470 return find_next_bit(src2p, nr_bits, n + 1);
3475 static inline int netif_set_xps_queue(struct net_device *dev,
3476 const struct cpumask *mask,
3482 static inline int __netif_set_xps_queue(struct net_device *dev,
3483 const unsigned long *mask,
3484 u16 index, bool is_rxqs_map)
3491 * netif_is_multiqueue - test if device has multiple transmit queues
3492 * @dev: network device
3494 * Check if device has multiple transmit queues
3496 static inline bool netif_is_multiqueue(const struct net_device *dev)
3498 return dev->num_tx_queues > 1;
3501 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3504 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3506 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3509 dev->real_num_rx_queues = rxqs;
3514 static inline struct netdev_rx_queue *
3515 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3517 return dev->_rx + rxq;
3521 static inline unsigned int get_netdev_rx_queue_index(
3522 struct netdev_rx_queue *queue)
3524 struct net_device *dev = queue->dev;
3525 int index = queue - dev->_rx;
3527 BUG_ON(index >= dev->num_rx_queues);
3532 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3533 int netif_get_num_default_rss_queues(void);
3535 enum skb_free_reason {
3536 SKB_REASON_CONSUMED,
3540 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3541 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3544 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3545 * interrupt context or with hardware interrupts being disabled.
3546 * (in_irq() || irqs_disabled())
3548 * We provide four helpers that can be used in following contexts :
3550 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3551 * replacing kfree_skb(skb)
3553 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3554 * Typically used in place of consume_skb(skb) in TX completion path
3556 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3557 * replacing kfree_skb(skb)
3559 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3560 * and consumed a packet. Used in place of consume_skb(skb)
3562 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3564 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3567 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3569 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3572 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3574 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3577 static inline void dev_consume_skb_any(struct sk_buff *skb)
3579 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3582 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3583 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3584 int netif_rx(struct sk_buff *skb);
3585 int netif_rx_ni(struct sk_buff *skb);
3586 int netif_receive_skb(struct sk_buff *skb);
3587 int netif_receive_skb_core(struct sk_buff *skb);
3588 void netif_receive_skb_list(struct list_head *head);
3589 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3590 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3591 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3592 gro_result_t napi_gro_frags(struct napi_struct *napi);
3593 struct packet_offload *gro_find_receive_by_type(__be16 type);
3594 struct packet_offload *gro_find_complete_by_type(__be16 type);
3596 static inline void napi_free_frags(struct napi_struct *napi)
3598 kfree_skb(napi->skb);
3602 bool netdev_is_rx_handler_busy(struct net_device *dev);
3603 int netdev_rx_handler_register(struct net_device *dev,
3604 rx_handler_func_t *rx_handler,
3605 void *rx_handler_data);
3606 void netdev_rx_handler_unregister(struct net_device *dev);
3608 bool dev_valid_name(const char *name);
3609 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3610 bool *need_copyout);
3611 int dev_ifconf(struct net *net, struct ifconf *, int);
3612 int dev_ethtool(struct net *net, struct ifreq *);
3613 unsigned int dev_get_flags(const struct net_device *);
3614 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3615 struct netlink_ext_ack *extack);
3616 int dev_change_flags(struct net_device *dev, unsigned int flags,
3617 struct netlink_ext_ack *extack);
3618 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3619 unsigned int gchanges);
3620 int dev_change_name(struct net_device *, const char *);
3621 int dev_set_alias(struct net_device *, const char *, size_t);
3622 int dev_get_alias(const struct net_device *, char *, size_t);
3623 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3624 int __dev_set_mtu(struct net_device *, int);
3625 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3626 struct netlink_ext_ack *extack);
3627 int dev_set_mtu(struct net_device *, int);
3628 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3629 void dev_set_group(struct net_device *, int);
3630 int dev_set_mac_address(struct net_device *, struct sockaddr *);
3631 int dev_change_carrier(struct net_device *, bool new_carrier);
3632 int dev_get_phys_port_id(struct net_device *dev,
3633 struct netdev_phys_item_id *ppid);
3634 int dev_get_phys_port_name(struct net_device *dev,
3635 char *name, size_t len);
3636 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3637 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3638 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3639 struct netdev_queue *txq, int *ret);
3641 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3642 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3644 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3645 enum bpf_netdev_command cmd);
3646 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3648 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3649 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3650 bool is_skb_forwardable(const struct net_device *dev,
3651 const struct sk_buff *skb);
3653 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3654 struct sk_buff *skb)
3656 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3657 unlikely(!is_skb_forwardable(dev, skb))) {
3658 atomic_long_inc(&dev->rx_dropped);
3663 skb_scrub_packet(skb, true);
3668 bool dev_nit_active(struct net_device *dev);
3669 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3671 extern int netdev_budget;
3672 extern unsigned int netdev_budget_usecs;
3674 /* Called by rtnetlink.c:rtnl_unlock() */
3675 void netdev_run_todo(void);
3678 * dev_put - release reference to device
3679 * @dev: network device
3681 * Release reference to device to allow it to be freed.
3683 static inline void dev_put(struct net_device *dev)
3685 this_cpu_dec(*dev->pcpu_refcnt);
3689 * dev_hold - get reference to device
3690 * @dev: network device
3692 * Hold reference to device to keep it from being freed.
3694 static inline void dev_hold(struct net_device *dev)
3696 this_cpu_inc(*dev->pcpu_refcnt);
3699 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3700 * and _off may be called from IRQ context, but it is caller
3701 * who is responsible for serialization of these calls.
3703 * The name carrier is inappropriate, these functions should really be
3704 * called netif_lowerlayer_*() because they represent the state of any
3705 * kind of lower layer not just hardware media.
3708 void linkwatch_init_dev(struct net_device *dev);
3709 void linkwatch_fire_event(struct net_device *dev);
3710 void linkwatch_forget_dev(struct net_device *dev);
3713 * netif_carrier_ok - test if carrier present
3714 * @dev: network device
3716 * Check if carrier is present on device
3718 static inline bool netif_carrier_ok(const struct net_device *dev)
3720 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3723 unsigned long dev_trans_start(struct net_device *dev);
3725 void __netdev_watchdog_up(struct net_device *dev);
3727 void netif_carrier_on(struct net_device *dev);
3729 void netif_carrier_off(struct net_device *dev);
3732 * netif_dormant_on - mark device as dormant.
3733 * @dev: network device
3735 * Mark device as dormant (as per RFC2863).
3737 * The dormant state indicates that the relevant interface is not
3738 * actually in a condition to pass packets (i.e., it is not 'up') but is
3739 * in a "pending" state, waiting for some external event. For "on-
3740 * demand" interfaces, this new state identifies the situation where the
3741 * interface is waiting for events to place it in the up state.
3743 static inline void netif_dormant_on(struct net_device *dev)
3745 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3746 linkwatch_fire_event(dev);
3750 * netif_dormant_off - set device as not dormant.
3751 * @dev: network device
3753 * Device is not in dormant state.
3755 static inline void netif_dormant_off(struct net_device *dev)
3757 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3758 linkwatch_fire_event(dev);
3762 * netif_dormant - test if device is dormant
3763 * @dev: network device
3765 * Check if device is dormant.
3767 static inline bool netif_dormant(const struct net_device *dev)
3769 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3774 * netif_oper_up - test if device is operational
3775 * @dev: network device
3777 * Check if carrier is operational
3779 static inline bool netif_oper_up(const struct net_device *dev)
3781 return (dev->operstate == IF_OPER_UP ||
3782 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3786 * netif_device_present - is device available or removed
3787 * @dev: network device
3789 * Check if device has not been removed from system.
3791 static inline bool netif_device_present(struct net_device *dev)
3793 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3796 void netif_device_detach(struct net_device *dev);
3798 void netif_device_attach(struct net_device *dev);
3801 * Network interface message level settings
3805 NETIF_MSG_DRV = 0x0001,
3806 NETIF_MSG_PROBE = 0x0002,
3807 NETIF_MSG_LINK = 0x0004,
3808 NETIF_MSG_TIMER = 0x0008,
3809 NETIF_MSG_IFDOWN = 0x0010,
3810 NETIF_MSG_IFUP = 0x0020,
3811 NETIF_MSG_RX_ERR = 0x0040,
3812 NETIF_MSG_TX_ERR = 0x0080,
3813 NETIF_MSG_TX_QUEUED = 0x0100,
3814 NETIF_MSG_INTR = 0x0200,
3815 NETIF_MSG_TX_DONE = 0x0400,
3816 NETIF_MSG_RX_STATUS = 0x0800,
3817 NETIF_MSG_PKTDATA = 0x1000,
3818 NETIF_MSG_HW = 0x2000,
3819 NETIF_MSG_WOL = 0x4000,
3822 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3823 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3824 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3825 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3826 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3827 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3828 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3829 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3830 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3831 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3832 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3833 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3834 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3835 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3836 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3838 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3841 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3842 return default_msg_enable_bits;
3843 if (debug_value == 0) /* no output */
3845 /* set low N bits */
3846 return (1 << debug_value) - 1;
3849 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3851 spin_lock(&txq->_xmit_lock);
3852 txq->xmit_lock_owner = cpu;
3855 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3857 __acquire(&txq->_xmit_lock);
3861 static inline void __netif_tx_release(struct netdev_queue *txq)
3863 __release(&txq->_xmit_lock);
3866 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3868 spin_lock_bh(&txq->_xmit_lock);
3869 txq->xmit_lock_owner = smp_processor_id();
3872 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3874 bool ok = spin_trylock(&txq->_xmit_lock);
3876 txq->xmit_lock_owner = smp_processor_id();
3880 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3882 txq->xmit_lock_owner = -1;
3883 spin_unlock(&txq->_xmit_lock);
3886 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3888 txq->xmit_lock_owner = -1;
3889 spin_unlock_bh(&txq->_xmit_lock);
3892 static inline void txq_trans_update(struct netdev_queue *txq)
3894 if (txq->xmit_lock_owner != -1)
3895 txq->trans_start = jiffies;
3898 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3899 static inline void netif_trans_update(struct net_device *dev)
3901 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3903 if (txq->trans_start != jiffies)
3904 txq->trans_start = jiffies;
3908 * netif_tx_lock - grab network device transmit lock
3909 * @dev: network device
3911 * Get network device transmit lock
3913 static inline void netif_tx_lock(struct net_device *dev)
3918 spin_lock(&dev->tx_global_lock);
3919 cpu = smp_processor_id();
3920 for (i = 0; i < dev->num_tx_queues; i++) {
3921 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3923 /* We are the only thread of execution doing a
3924 * freeze, but we have to grab the _xmit_lock in
3925 * order to synchronize with threads which are in
3926 * the ->hard_start_xmit() handler and already
3927 * checked the frozen bit.
3929 __netif_tx_lock(txq, cpu);
3930 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3931 __netif_tx_unlock(txq);
3935 static inline void netif_tx_lock_bh(struct net_device *dev)
3941 static inline void netif_tx_unlock(struct net_device *dev)
3945 for (i = 0; i < dev->num_tx_queues; i++) {
3946 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3948 /* No need to grab the _xmit_lock here. If the
3949 * queue is not stopped for another reason, we
3952 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3953 netif_schedule_queue(txq);
3955 spin_unlock(&dev->tx_global_lock);
3958 static inline void netif_tx_unlock_bh(struct net_device *dev)
3960 netif_tx_unlock(dev);
3964 #define HARD_TX_LOCK(dev, txq, cpu) { \
3965 if ((dev->features & NETIF_F_LLTX) == 0) { \
3966 __netif_tx_lock(txq, cpu); \
3968 __netif_tx_acquire(txq); \
3972 #define HARD_TX_TRYLOCK(dev, txq) \
3973 (((dev->features & NETIF_F_LLTX) == 0) ? \
3974 __netif_tx_trylock(txq) : \
3975 __netif_tx_acquire(txq))
3977 #define HARD_TX_UNLOCK(dev, txq) { \
3978 if ((dev->features & NETIF_F_LLTX) == 0) { \
3979 __netif_tx_unlock(txq); \
3981 __netif_tx_release(txq); \
3985 static inline void netif_tx_disable(struct net_device *dev)
3991 cpu = smp_processor_id();
3992 for (i = 0; i < dev->num_tx_queues; i++) {
3993 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3995 __netif_tx_lock(txq, cpu);
3996 netif_tx_stop_queue(txq);
3997 __netif_tx_unlock(txq);
4002 static inline void netif_addr_lock(struct net_device *dev)
4004 spin_lock(&dev->addr_list_lock);
4007 static inline void netif_addr_lock_nested(struct net_device *dev)
4009 int subclass = SINGLE_DEPTH_NESTING;
4011 if (dev->netdev_ops->ndo_get_lock_subclass)
4012 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
4014 spin_lock_nested(&dev->addr_list_lock, subclass);
4017 static inline void netif_addr_lock_bh(struct net_device *dev)
4019 spin_lock_bh(&dev->addr_list_lock);
4022 static inline void netif_addr_unlock(struct net_device *dev)
4024 spin_unlock(&dev->addr_list_lock);
4027 static inline void netif_addr_unlock_bh(struct net_device *dev)
4029 spin_unlock_bh(&dev->addr_list_lock);
4033 * dev_addrs walker. Should be used only for read access. Call with
4034 * rcu_read_lock held.
4036 #define for_each_dev_addr(dev, ha) \
4037 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4039 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4041 void ether_setup(struct net_device *dev);
4043 /* Support for loadable net-drivers */
4044 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4045 unsigned char name_assign_type,
4046 void (*setup)(struct net_device *),
4047 unsigned int txqs, unsigned int rxqs);
4048 int dev_get_valid_name(struct net *net, struct net_device *dev,
4051 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4052 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4054 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4055 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4058 int register_netdev(struct net_device *dev);
4059 void unregister_netdev(struct net_device *dev);
4061 /* General hardware address lists handling functions */
4062 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4063 struct netdev_hw_addr_list *from_list, int addr_len);
4064 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4065 struct netdev_hw_addr_list *from_list, int addr_len);
4066 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4067 struct net_device *dev,
4068 int (*sync)(struct net_device *, const unsigned char *),
4069 int (*unsync)(struct net_device *,
4070 const unsigned char *));
4071 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4072 struct net_device *dev,
4073 int (*sync)(struct net_device *,
4074 const unsigned char *, int),
4075 int (*unsync)(struct net_device *,
4076 const unsigned char *, int));
4077 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4078 struct net_device *dev,
4079 int (*unsync)(struct net_device *,
4080 const unsigned char *, int));
4081 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4082 struct net_device *dev,
4083 int (*unsync)(struct net_device *,
4084 const unsigned char *));
4085 void __hw_addr_init(struct netdev_hw_addr_list *list);
4087 /* Functions used for device addresses handling */
4088 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4089 unsigned char addr_type);
4090 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4091 unsigned char addr_type);
4092 void dev_addr_flush(struct net_device *dev);
4093 int dev_addr_init(struct net_device *dev);
4095 /* Functions used for unicast addresses handling */
4096 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4097 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4098 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4099 int dev_uc_sync(struct net_device *to, struct net_device *from);
4100 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4101 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4102 void dev_uc_flush(struct net_device *dev);
4103 void dev_uc_init(struct net_device *dev);
4106 * __dev_uc_sync - Synchonize device's unicast list
4107 * @dev: device to sync
4108 * @sync: function to call if address should be added
4109 * @unsync: function to call if address should be removed
4111 * Add newly added addresses to the interface, and release
4112 * addresses that have been deleted.
4114 static inline int __dev_uc_sync(struct net_device *dev,
4115 int (*sync)(struct net_device *,
4116 const unsigned char *),
4117 int (*unsync)(struct net_device *,
4118 const unsigned char *))
4120 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4124 * __dev_uc_unsync - Remove synchronized addresses from device
4125 * @dev: device to sync
4126 * @unsync: function to call if address should be removed
4128 * Remove all addresses that were added to the device by dev_uc_sync().
4130 static inline void __dev_uc_unsync(struct net_device *dev,
4131 int (*unsync)(struct net_device *,
4132 const unsigned char *))
4134 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4137 /* Functions used for multicast addresses handling */
4138 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4139 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4140 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4141 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4142 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4143 int dev_mc_sync(struct net_device *to, struct net_device *from);
4144 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4145 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4146 void dev_mc_flush(struct net_device *dev);
4147 void dev_mc_init(struct net_device *dev);
4150 * __dev_mc_sync - Synchonize device's multicast list
4151 * @dev: device to sync
4152 * @sync: function to call if address should be added
4153 * @unsync: function to call if address should be removed
4155 * Add newly added addresses to the interface, and release
4156 * addresses that have been deleted.
4158 static inline int __dev_mc_sync(struct net_device *dev,
4159 int (*sync)(struct net_device *,
4160 const unsigned char *),
4161 int (*unsync)(struct net_device *,
4162 const unsigned char *))
4164 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4168 * __dev_mc_unsync - Remove synchronized addresses from device
4169 * @dev: device to sync
4170 * @unsync: function to call if address should be removed
4172 * Remove all addresses that were added to the device by dev_mc_sync().
4174 static inline void __dev_mc_unsync(struct net_device *dev,
4175 int (*unsync)(struct net_device *,
4176 const unsigned char *))
4178 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4181 /* Functions used for secondary unicast and multicast support */
4182 void dev_set_rx_mode(struct net_device *dev);
4183 void __dev_set_rx_mode(struct net_device *dev);
4184 int dev_set_promiscuity(struct net_device *dev, int inc);
4185 int dev_set_allmulti(struct net_device *dev, int inc);
4186 void netdev_state_change(struct net_device *dev);
4187 void netdev_notify_peers(struct net_device *dev);
4188 void netdev_features_change(struct net_device *dev);
4189 /* Load a device via the kmod */
4190 void dev_load(struct net *net, const char *name);
4191 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4192 struct rtnl_link_stats64 *storage);
4193 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4194 const struct net_device_stats *netdev_stats);
4196 extern int netdev_max_backlog;
4197 extern int netdev_tstamp_prequeue;
4198 extern int weight_p;
4199 extern int dev_weight_rx_bias;
4200 extern int dev_weight_tx_bias;
4201 extern int dev_rx_weight;
4202 extern int dev_tx_weight;
4204 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4205 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4206 struct list_head **iter);
4207 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4208 struct list_head **iter);
4210 /* iterate through upper list, must be called under RCU read lock */
4211 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4212 for (iter = &(dev)->adj_list.upper, \
4213 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4215 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4217 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4218 int (*fn)(struct net_device *upper_dev,
4222 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4223 struct net_device *upper_dev);
4225 bool netdev_has_any_upper_dev(struct net_device *dev);
4227 void *netdev_lower_get_next_private(struct net_device *dev,
4228 struct list_head **iter);
4229 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4230 struct list_head **iter);
4232 #define netdev_for_each_lower_private(dev, priv, iter) \
4233 for (iter = (dev)->adj_list.lower.next, \
4234 priv = netdev_lower_get_next_private(dev, &(iter)); \
4236 priv = netdev_lower_get_next_private(dev, &(iter)))
4238 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4239 for (iter = &(dev)->adj_list.lower, \
4240 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4242 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4244 void *netdev_lower_get_next(struct net_device *dev,
4245 struct list_head **iter);
4247 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4248 for (iter = (dev)->adj_list.lower.next, \
4249 ldev = netdev_lower_get_next(dev, &(iter)); \
4251 ldev = netdev_lower_get_next(dev, &(iter)))
4253 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
4254 struct list_head **iter);
4255 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
4256 struct list_head **iter);
4258 int netdev_walk_all_lower_dev(struct net_device *dev,
4259 int (*fn)(struct net_device *lower_dev,
4262 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4263 int (*fn)(struct net_device *lower_dev,
4267 void *netdev_adjacent_get_private(struct list_head *adj_list);
4268 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4269 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4270 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4271 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4272 struct netlink_ext_ack *extack);
4273 int netdev_master_upper_dev_link(struct net_device *dev,
4274 struct net_device *upper_dev,
4275 void *upper_priv, void *upper_info,
4276 struct netlink_ext_ack *extack);
4277 void netdev_upper_dev_unlink(struct net_device *dev,
4278 struct net_device *upper_dev);
4279 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4280 void *netdev_lower_dev_get_private(struct net_device *dev,
4281 struct net_device *lower_dev);
4282 void netdev_lower_state_changed(struct net_device *lower_dev,
4283 void *lower_state_info);
4285 /* RSS keys are 40 or 52 bytes long */
4286 #define NETDEV_RSS_KEY_LEN 52
4287 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4288 void netdev_rss_key_fill(void *buffer, size_t len);
4290 int dev_get_nest_level(struct net_device *dev);
4291 int skb_checksum_help(struct sk_buff *skb);
4292 int skb_crc32c_csum_help(struct sk_buff *skb);
4293 int skb_csum_hwoffload_help(struct sk_buff *skb,
4294 const netdev_features_t features);
4296 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4297 netdev_features_t features, bool tx_path);
4298 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4299 netdev_features_t features);
4301 struct netdev_bonding_info {
4306 struct netdev_notifier_bonding_info {
4307 struct netdev_notifier_info info; /* must be first */
4308 struct netdev_bonding_info bonding_info;
4311 void netdev_bonding_info_change(struct net_device *dev,
4312 struct netdev_bonding_info *bonding_info);
4315 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4317 return __skb_gso_segment(skb, features, true);
4319 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4321 static inline bool can_checksum_protocol(netdev_features_t features,
4324 if (protocol == htons(ETH_P_FCOE))
4325 return !!(features & NETIF_F_FCOE_CRC);
4327 /* Assume this is an IP checksum (not SCTP CRC) */
4329 if (features & NETIF_F_HW_CSUM) {
4330 /* Can checksum everything */
4335 case htons(ETH_P_IP):
4336 return !!(features & NETIF_F_IP_CSUM);
4337 case htons(ETH_P_IPV6):
4338 return !!(features & NETIF_F_IPV6_CSUM);
4345 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4347 static inline void netdev_rx_csum_fault(struct net_device *dev,
4348 struct sk_buff *skb)
4352 /* rx skb timestamps */
4353 void net_enable_timestamp(void);
4354 void net_disable_timestamp(void);
4356 #ifdef CONFIG_PROC_FS
4357 int __init dev_proc_init(void);
4359 #define dev_proc_init() 0
4362 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4363 struct sk_buff *skb, struct net_device *dev,
4366 skb->xmit_more = more ? 1 : 0;
4367 return ops->ndo_start_xmit(skb, dev);
4370 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4371 struct netdev_queue *txq, bool more)
4373 const struct net_device_ops *ops = dev->netdev_ops;
4376 rc = __netdev_start_xmit(ops, skb, dev, more);
4377 if (rc == NETDEV_TX_OK)
4378 txq_trans_update(txq);
4383 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4385 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4388 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4390 return netdev_class_create_file_ns(class_attr, NULL);
4393 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4395 netdev_class_remove_file_ns(class_attr, NULL);
4398 extern const struct kobj_ns_type_operations net_ns_type_operations;
4400 const char *netdev_drivername(const struct net_device *dev);
4402 void linkwatch_run_queue(void);
4404 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4405 netdev_features_t f2)
4407 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4408 if (f1 & NETIF_F_HW_CSUM)
4409 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4411 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4417 static inline netdev_features_t netdev_get_wanted_features(
4418 struct net_device *dev)
4420 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4422 netdev_features_t netdev_increment_features(netdev_features_t all,
4423 netdev_features_t one, netdev_features_t mask);
4425 /* Allow TSO being used on stacked device :
4426 * Performing the GSO segmentation before last device
4427 * is a performance improvement.
4429 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4430 netdev_features_t mask)
4432 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4435 int __netdev_update_features(struct net_device *dev);
4436 void netdev_update_features(struct net_device *dev);
4437 void netdev_change_features(struct net_device *dev);
4439 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4440 struct net_device *dev);
4442 netdev_features_t passthru_features_check(struct sk_buff *skb,
4443 struct net_device *dev,
4444 netdev_features_t features);
4445 netdev_features_t netif_skb_features(struct sk_buff *skb);
4447 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4449 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4451 /* check flags correspondence */
4452 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4453 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4454 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4455 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4456 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4457 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4458 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4459 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4460 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4461 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4462 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4463 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4464 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4465 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4466 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4467 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4468 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4469 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4471 return (features & feature) == feature;
4474 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4476 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4477 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4480 static inline bool netif_needs_gso(struct sk_buff *skb,
4481 netdev_features_t features)
4483 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4484 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4485 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4488 static inline void netif_set_gso_max_size(struct net_device *dev,
4491 dev->gso_max_size = size;
4494 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4495 int pulled_hlen, u16 mac_offset,
4498 skb->protocol = protocol;
4499 skb->encapsulation = 1;
4500 skb_push(skb, pulled_hlen);
4501 skb_reset_transport_header(skb);
4502 skb->mac_header = mac_offset;
4503 skb->network_header = skb->mac_header + mac_len;
4504 skb->mac_len = mac_len;
4507 static inline bool netif_is_macsec(const struct net_device *dev)
4509 return dev->priv_flags & IFF_MACSEC;
4512 static inline bool netif_is_macvlan(const struct net_device *dev)
4514 return dev->priv_flags & IFF_MACVLAN;
4517 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4519 return dev->priv_flags & IFF_MACVLAN_PORT;
4522 static inline bool netif_is_bond_master(const struct net_device *dev)
4524 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4527 static inline bool netif_is_bond_slave(const struct net_device *dev)
4529 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4532 static inline bool netif_supports_nofcs(struct net_device *dev)
4534 return dev->priv_flags & IFF_SUPP_NOFCS;
4537 static inline bool netif_is_l3_master(const struct net_device *dev)
4539 return dev->priv_flags & IFF_L3MDEV_MASTER;
4542 static inline bool netif_is_l3_slave(const struct net_device *dev)
4544 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4547 static inline bool netif_is_bridge_master(const struct net_device *dev)
4549 return dev->priv_flags & IFF_EBRIDGE;
4552 static inline bool netif_is_bridge_port(const struct net_device *dev)
4554 return dev->priv_flags & IFF_BRIDGE_PORT;
4557 static inline bool netif_is_ovs_master(const struct net_device *dev)
4559 return dev->priv_flags & IFF_OPENVSWITCH;
4562 static inline bool netif_is_ovs_port(const struct net_device *dev)
4564 return dev->priv_flags & IFF_OVS_DATAPATH;
4567 static inline bool netif_is_team_master(const struct net_device *dev)
4569 return dev->priv_flags & IFF_TEAM;
4572 static inline bool netif_is_team_port(const struct net_device *dev)
4574 return dev->priv_flags & IFF_TEAM_PORT;
4577 static inline bool netif_is_lag_master(const struct net_device *dev)
4579 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4582 static inline bool netif_is_lag_port(const struct net_device *dev)
4584 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4587 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4589 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4592 static inline bool netif_is_failover(const struct net_device *dev)
4594 return dev->priv_flags & IFF_FAILOVER;
4597 static inline bool netif_is_failover_slave(const struct net_device *dev)
4599 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4602 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4603 static inline void netif_keep_dst(struct net_device *dev)
4605 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4608 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4609 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4611 /* TODO: reserve and use an additional IFF bit, if we get more users */
4612 return dev->priv_flags & IFF_MACSEC;
4615 extern struct pernet_operations __net_initdata loopback_net_ops;
4617 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4619 /* netdev_printk helpers, similar to dev_printk */
4621 static inline const char *netdev_name(const struct net_device *dev)
4623 if (!dev->name[0] || strchr(dev->name, '%'))
4624 return "(unnamed net_device)";
4628 static inline bool netdev_unregistering(const struct net_device *dev)
4630 return dev->reg_state == NETREG_UNREGISTERING;
4633 static inline const char *netdev_reg_state(const struct net_device *dev)
4635 switch (dev->reg_state) {
4636 case NETREG_UNINITIALIZED: return " (uninitialized)";
4637 case NETREG_REGISTERED: return "";
4638 case NETREG_UNREGISTERING: return " (unregistering)";
4639 case NETREG_UNREGISTERED: return " (unregistered)";
4640 case NETREG_RELEASED: return " (released)";
4641 case NETREG_DUMMY: return " (dummy)";
4644 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4645 return " (unknown)";
4649 void netdev_printk(const char *level, const struct net_device *dev,
4650 const char *format, ...);
4652 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4654 void netdev_alert(const struct net_device *dev, const char *format, ...);
4656 void netdev_crit(const struct net_device *dev, const char *format, ...);
4658 void netdev_err(const struct net_device *dev, const char *format, ...);
4660 void netdev_warn(const struct net_device *dev, const char *format, ...);
4662 void netdev_notice(const struct net_device *dev, const char *format, ...);
4664 void netdev_info(const struct net_device *dev, const char *format, ...);
4666 #define netdev_level_once(level, dev, fmt, ...) \
4668 static bool __print_once __read_mostly; \
4670 if (!__print_once) { \
4671 __print_once = true; \
4672 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4676 #define netdev_emerg_once(dev, fmt, ...) \
4677 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4678 #define netdev_alert_once(dev, fmt, ...) \
4679 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4680 #define netdev_crit_once(dev, fmt, ...) \
4681 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4682 #define netdev_err_once(dev, fmt, ...) \
4683 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4684 #define netdev_warn_once(dev, fmt, ...) \
4685 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4686 #define netdev_notice_once(dev, fmt, ...) \
4687 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4688 #define netdev_info_once(dev, fmt, ...) \
4689 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4691 #define MODULE_ALIAS_NETDEV(device) \
4692 MODULE_ALIAS("netdev-" device)
4694 #if defined(CONFIG_DYNAMIC_DEBUG)
4695 #define netdev_dbg(__dev, format, args...) \
4697 dynamic_netdev_dbg(__dev, format, ##args); \
4699 #elif defined(DEBUG)
4700 #define netdev_dbg(__dev, format, args...) \
4701 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4703 #define netdev_dbg(__dev, format, args...) \
4706 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4710 #if defined(VERBOSE_DEBUG)
4711 #define netdev_vdbg netdev_dbg
4714 #define netdev_vdbg(dev, format, args...) \
4717 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4723 * netdev_WARN() acts like dev_printk(), but with the key difference
4724 * of using a WARN/WARN_ON to get the message out, including the
4725 * file/line information and a backtrace.
4727 #define netdev_WARN(dev, format, args...) \
4728 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4729 netdev_reg_state(dev), ##args)
4731 #define netdev_WARN_ONCE(dev, format, args...) \
4732 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4733 netdev_reg_state(dev), ##args)
4735 /* netif printk helpers, similar to netdev_printk */
4737 #define netif_printk(priv, type, level, dev, fmt, args...) \
4739 if (netif_msg_##type(priv)) \
4740 netdev_printk(level, (dev), fmt, ##args); \
4743 #define netif_level(level, priv, type, dev, fmt, args...) \
4745 if (netif_msg_##type(priv)) \
4746 netdev_##level(dev, fmt, ##args); \
4749 #define netif_emerg(priv, type, dev, fmt, args...) \
4750 netif_level(emerg, priv, type, dev, fmt, ##args)
4751 #define netif_alert(priv, type, dev, fmt, args...) \
4752 netif_level(alert, priv, type, dev, fmt, ##args)
4753 #define netif_crit(priv, type, dev, fmt, args...) \
4754 netif_level(crit, priv, type, dev, fmt, ##args)
4755 #define netif_err(priv, type, dev, fmt, args...) \
4756 netif_level(err, priv, type, dev, fmt, ##args)
4757 #define netif_warn(priv, type, dev, fmt, args...) \
4758 netif_level(warn, priv, type, dev, fmt, ##args)
4759 #define netif_notice(priv, type, dev, fmt, args...) \
4760 netif_level(notice, priv, type, dev, fmt, ##args)
4761 #define netif_info(priv, type, dev, fmt, args...) \
4762 netif_level(info, priv, type, dev, fmt, ##args)
4764 #if defined(CONFIG_DYNAMIC_DEBUG)
4765 #define netif_dbg(priv, type, netdev, format, args...) \
4767 if (netif_msg_##type(priv)) \
4768 dynamic_netdev_dbg(netdev, format, ##args); \
4770 #elif defined(DEBUG)
4771 #define netif_dbg(priv, type, dev, format, args...) \
4772 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4774 #define netif_dbg(priv, type, dev, format, args...) \
4777 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4782 /* if @cond then downgrade to debug, else print at @level */
4783 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4786 netif_dbg(priv, type, netdev, fmt, ##args); \
4788 netif_ ## level(priv, type, netdev, fmt, ##args); \
4791 #if defined(VERBOSE_DEBUG)
4792 #define netif_vdbg netif_dbg
4794 #define netif_vdbg(priv, type, dev, format, args...) \
4797 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4803 * The list of packet types we will receive (as opposed to discard)
4804 * and the routines to invoke.
4806 * Why 16. Because with 16 the only overlap we get on a hash of the
4807 * low nibble of the protocol value is RARP/SNAP/X.25.
4821 #define PTYPE_HASH_SIZE (16)
4822 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4824 #endif /* _LINUX_NETDEVICE_H */