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>
63 /* 802.15.4 specific */
66 /* UDP Tunnel offloads */
67 struct udp_tunnel_info
;
71 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
72 const struct ethtool_ops
*ops
);
74 /* Backlog congestion levels */
75 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
76 #define NET_RX_DROP 1 /* packet dropped */
79 * Transmit return codes: transmit return codes originate from three different
82 * - qdisc return codes
83 * - driver transmit return codes
86 * Drivers are allowed to return any one of those in their hard_start_xmit()
87 * function. Real network devices commonly used with qdiscs should only return
88 * the driver transmit return codes though - when qdiscs are used, the actual
89 * transmission happens asynchronously, so the value is not propagated to
90 * higher layers. Virtual network devices transmit synchronously; in this case
91 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
92 * others are propagated to higher layers.
95 /* qdisc ->enqueue() return codes. */
96 #define NET_XMIT_SUCCESS 0x00
97 #define NET_XMIT_DROP 0x01 /* skb dropped */
98 #define NET_XMIT_CN 0x02 /* congestion notification */
99 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
101 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
102 * indicates that the device will soon be dropping packets, or already drops
103 * some packets of the same priority; prompting us to send less aggressively. */
104 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
105 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107 /* Driver transmit return codes */
108 #define NETDEV_TX_MASK 0xf0
111 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
112 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
113 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
115 typedef enum netdev_tx netdev_tx_t
;
118 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
119 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
121 static inline bool dev_xmit_complete(int rc
)
124 * Positive cases with an skb consumed by a driver:
125 * - successful transmission (rc == NETDEV_TX_OK)
126 * - error while transmitting (rc < 0)
127 * - error while queueing to a different device (rc & NET_XMIT_MASK)
129 if (likely(rc
< NET_XMIT_MASK
))
136 * Compute the worst-case header length according to the protocols
140 #if defined(CONFIG_HYPERV_NET)
141 # define LL_MAX_HEADER 128
142 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
143 # if defined(CONFIG_MAC80211_MESH)
144 # define LL_MAX_HEADER 128
146 # define LL_MAX_HEADER 96
149 # define LL_MAX_HEADER 32
152 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
153 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
154 #define MAX_HEADER LL_MAX_HEADER
156 #define MAX_HEADER (LL_MAX_HEADER + 48)
160 * Old network device statistics. Fields are native words
161 * (unsigned long) so they can be read and written atomically.
164 struct net_device_stats
{
165 unsigned long rx_packets
;
166 unsigned long tx_packets
;
167 unsigned long rx_bytes
;
168 unsigned long tx_bytes
;
169 unsigned long rx_errors
;
170 unsigned long tx_errors
;
171 unsigned long rx_dropped
;
172 unsigned long tx_dropped
;
173 unsigned long multicast
;
174 unsigned long collisions
;
175 unsigned long rx_length_errors
;
176 unsigned long rx_over_errors
;
177 unsigned long rx_crc_errors
;
178 unsigned long rx_frame_errors
;
179 unsigned long rx_fifo_errors
;
180 unsigned long rx_missed_errors
;
181 unsigned long tx_aborted_errors
;
182 unsigned long tx_carrier_errors
;
183 unsigned long tx_fifo_errors
;
184 unsigned long tx_heartbeat_errors
;
185 unsigned long tx_window_errors
;
186 unsigned long rx_compressed
;
187 unsigned long tx_compressed
;
191 #include <linux/cache.h>
192 #include <linux/skbuff.h>
195 #include <linux/static_key.h>
196 extern struct static_key rps_needed
;
197 extern struct static_key rfs_needed
;
204 struct netdev_hw_addr
{
205 struct list_head list
;
206 unsigned char addr
[MAX_ADDR_LEN
];
208 #define NETDEV_HW_ADDR_T_LAN 1
209 #define NETDEV_HW_ADDR_T_SAN 2
210 #define NETDEV_HW_ADDR_T_SLAVE 3
211 #define NETDEV_HW_ADDR_T_UNICAST 4
212 #define NETDEV_HW_ADDR_T_MULTICAST 5
217 struct rcu_head rcu_head
;
220 struct netdev_hw_addr_list
{
221 struct list_head list
;
225 #define netdev_hw_addr_list_count(l) ((l)->count)
226 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
227 #define netdev_hw_addr_list_for_each(ha, l) \
228 list_for_each_entry(ha, &(l)->list, list)
230 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
231 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
232 #define netdev_for_each_uc_addr(ha, dev) \
233 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
235 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
236 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
237 #define netdev_for_each_mc_addr(ha, dev) \
238 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
244 /* cached hardware header; allow for machine alignment needs. */
245 #define HH_DATA_MOD 16
246 #define HH_DATA_OFF(__len) \
247 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
248 #define HH_DATA_ALIGN(__len) \
249 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
250 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
253 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
255 * dev->hard_header_len ? (dev->hard_header_len +
256 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
258 * We could use other alignment values, but we must maintain the
259 * relationship HH alignment <= LL alignment.
261 #define LL_RESERVED_SPACE(dev) \
262 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
263 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
264 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
268 unsigned short type
, const void *daddr
,
269 const void *saddr
, unsigned int len
);
270 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
271 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
272 void (*cache_update
)(struct hh_cache
*hh
,
273 const struct net_device
*dev
,
274 const unsigned char *haddr
);
275 bool (*validate
)(const char *ll_header
, unsigned int len
);
278 /* These flag bits are private to the generic network queueing
279 * layer; they may not be explicitly referenced by any other
283 enum netdev_state_t
{
285 __LINK_STATE_PRESENT
,
286 __LINK_STATE_NOCARRIER
,
287 __LINK_STATE_LINKWATCH_PENDING
,
288 __LINK_STATE_DORMANT
,
293 * This structure holds boot-time configured netdevice settings. They
294 * are then used in the device probing.
296 struct netdev_boot_setup
{
300 #define NETDEV_BOOT_SETUP_MAX 8
302 int __init
netdev_boot_setup(char *str
);
305 * Structure for NAPI scheduling similar to tasklet but with weighting
308 /* The poll_list must only be managed by the entity which
309 * changes the state of the NAPI_STATE_SCHED bit. This means
310 * whoever atomically sets that bit can add this napi_struct
311 * to the per-CPU poll_list, and whoever clears that bit
312 * can remove from the list right before clearing the bit.
314 struct list_head poll_list
;
318 unsigned int gro_count
;
319 int (*poll
)(struct napi_struct
*, int);
320 #ifdef CONFIG_NETPOLL
323 struct net_device
*dev
;
324 struct sk_buff
*gro_list
;
326 struct hrtimer timer
;
327 struct list_head dev_list
;
328 struct hlist_node napi_hash_node
;
329 unsigned int napi_id
;
333 NAPI_STATE_SCHED
, /* Poll is scheduled */
334 NAPI_STATE_MISSED
, /* reschedule a napi */
335 NAPI_STATE_DISABLE
, /* Disable pending */
336 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
337 NAPI_STATE_HASHED
, /* In NAPI hash (busy polling possible) */
338 NAPI_STATE_NO_BUSY_POLL
,/* Do not add in napi_hash, no busy polling */
339 NAPI_STATE_IN_BUSY_POLL
,/* sk_busy_loop() owns this NAPI */
343 NAPIF_STATE_SCHED
= BIT(NAPI_STATE_SCHED
),
344 NAPIF_STATE_MISSED
= BIT(NAPI_STATE_MISSED
),
345 NAPIF_STATE_DISABLE
= BIT(NAPI_STATE_DISABLE
),
346 NAPIF_STATE_NPSVC
= BIT(NAPI_STATE_NPSVC
),
347 NAPIF_STATE_HASHED
= BIT(NAPI_STATE_HASHED
),
348 NAPIF_STATE_NO_BUSY_POLL
= BIT(NAPI_STATE_NO_BUSY_POLL
),
349 NAPIF_STATE_IN_BUSY_POLL
= BIT(NAPI_STATE_IN_BUSY_POLL
),
360 typedef enum gro_result gro_result_t
;
363 * enum rx_handler_result - Possible return values for rx_handlers.
364 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
366 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
367 * case skb->dev was changed by rx_handler.
368 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
369 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
371 * rx_handlers are functions called from inside __netif_receive_skb(), to do
372 * special processing of the skb, prior to delivery to protocol handlers.
374 * Currently, a net_device can only have a single rx_handler registered. Trying
375 * to register a second rx_handler will return -EBUSY.
377 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
378 * To unregister a rx_handler on a net_device, use
379 * netdev_rx_handler_unregister().
381 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
384 * If the rx_handler consumed the skb in some way, it should return
385 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
386 * the skb to be delivered in some other way.
388 * If the rx_handler changed skb->dev, to divert the skb to another
389 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
390 * new device will be called if it exists.
392 * If the rx_handler decides the skb should be ignored, it should return
393 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
394 * are registered on exact device (ptype->dev == skb->dev).
396 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
397 * delivered, it should return RX_HANDLER_PASS.
399 * A device without a registered rx_handler will behave as if rx_handler
400 * returned RX_HANDLER_PASS.
403 enum rx_handler_result
{
409 typedef enum rx_handler_result rx_handler_result_t
;
410 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
412 void __napi_schedule(struct napi_struct
*n
);
413 void __napi_schedule_irqoff(struct napi_struct
*n
);
415 static inline bool napi_disable_pending(struct napi_struct
*n
)
417 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
420 bool napi_schedule_prep(struct napi_struct
*n
);
423 * napi_schedule - schedule NAPI poll
426 * Schedule NAPI poll routine to be called if it is not already
429 static inline void napi_schedule(struct napi_struct
*n
)
431 if (napi_schedule_prep(n
))
436 * napi_schedule_irqoff - schedule NAPI poll
439 * Variant of napi_schedule(), assuming hard irqs are masked.
441 static inline void napi_schedule_irqoff(struct napi_struct
*n
)
443 if (napi_schedule_prep(n
))
444 __napi_schedule_irqoff(n
);
447 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
448 static inline bool napi_reschedule(struct napi_struct
*napi
)
450 if (napi_schedule_prep(napi
)) {
451 __napi_schedule(napi
);
457 bool napi_complete_done(struct napi_struct
*n
, int work_done
);
459 * napi_complete - NAPI processing complete
462 * Mark NAPI processing as complete.
463 * Consider using napi_complete_done() instead.
464 * Return false if device should avoid rearming interrupts.
466 static inline bool napi_complete(struct napi_struct
*n
)
468 return napi_complete_done(n
, 0);
472 * napi_hash_del - remove a NAPI from global table
473 * @napi: NAPI context
475 * Warning: caller must observe RCU grace period
476 * before freeing memory containing @napi, if
477 * this function returns true.
478 * Note: core networking stack automatically calls it
479 * from netif_napi_del().
480 * Drivers might want to call this helper to combine all
481 * the needed RCU grace periods into a single one.
483 bool napi_hash_del(struct napi_struct
*napi
);
486 * napi_disable - prevent NAPI from scheduling
489 * Stop NAPI from being scheduled on this context.
490 * Waits till any outstanding processing completes.
492 void napi_disable(struct napi_struct
*n
);
495 * napi_enable - enable NAPI scheduling
498 * Resume NAPI from being scheduled on this context.
499 * Must be paired with napi_disable.
501 static inline void napi_enable(struct napi_struct
*n
)
503 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
504 smp_mb__before_atomic();
505 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
506 clear_bit(NAPI_STATE_NPSVC
, &n
->state
);
510 * napi_synchronize - wait until NAPI is not running
513 * Wait until NAPI is done being scheduled on this context.
514 * Waits till any outstanding processing completes but
515 * does not disable future activations.
517 static inline void napi_synchronize(const struct napi_struct
*n
)
519 if (IS_ENABLED(CONFIG_SMP
))
520 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
526 enum netdev_queue_state_t
{
527 __QUEUE_STATE_DRV_XOFF
,
528 __QUEUE_STATE_STACK_XOFF
,
529 __QUEUE_STATE_FROZEN
,
532 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
533 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
534 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
536 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
537 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
539 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
543 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
544 * netif_tx_* functions below are used to manipulate this flag. The
545 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
546 * queue independently. The netif_xmit_*stopped functions below are called
547 * to check if the queue has been stopped by the driver or stack (either
548 * of the XOFF bits are set in the state). Drivers should not need to call
549 * netif_xmit*stopped functions, they should only be using netif_tx_*.
552 struct netdev_queue
{
556 struct net_device
*dev
;
557 struct Qdisc __rcu
*qdisc
;
558 struct Qdisc
*qdisc_sleeping
;
562 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
565 unsigned long tx_maxrate
;
567 * Number of TX timeouts for this queue
568 * (/sys/class/net/DEV/Q/trans_timeout)
570 unsigned long trans_timeout
;
574 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
577 * Time (in jiffies) of last Tx
579 unsigned long trans_start
;
586 } ____cacheline_aligned_in_smp
;
588 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
590 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
597 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
599 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
606 * This structure holds an RPS map which can be of variable length. The
607 * map is an array of CPUs.
614 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
617 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
618 * tail pointer for that CPU's input queue at the time of last enqueue, and
619 * a hardware filter index.
621 struct rps_dev_flow
{
624 unsigned int last_qtail
;
626 #define RPS_NO_FILTER 0xffff
629 * The rps_dev_flow_table structure contains a table of flow mappings.
631 struct rps_dev_flow_table
{
634 struct rps_dev_flow flows
[0];
636 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
637 ((_num) * sizeof(struct rps_dev_flow)))
640 * The rps_sock_flow_table contains mappings of flows to the last CPU
641 * on which they were processed by the application (set in recvmsg).
642 * Each entry is a 32bit value. Upper part is the high-order bits
643 * of flow hash, lower part is CPU number.
644 * rps_cpu_mask is used to partition the space, depending on number of
645 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
646 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
647 * meaning we use 32-6=26 bits for the hash.
649 struct rps_sock_flow_table
{
652 u32 ents
[0] ____cacheline_aligned_in_smp
;
654 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
656 #define RPS_NO_CPU 0xffff
658 extern u32 rps_cpu_mask
;
659 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
661 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
665 unsigned int index
= hash
& table
->mask
;
666 u32 val
= hash
& ~rps_cpu_mask
;
668 /* We only give a hint, preemption can change CPU under us */
669 val
|= raw_smp_processor_id();
671 if (table
->ents
[index
] != val
)
672 table
->ents
[index
] = val
;
676 #ifdef CONFIG_RFS_ACCEL
677 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
680 #endif /* CONFIG_RPS */
682 /* This structure contains an instance of an RX queue. */
683 struct netdev_rx_queue
{
685 struct rps_map __rcu
*rps_map
;
686 struct rps_dev_flow_table __rcu
*rps_flow_table
;
689 struct net_device
*dev
;
690 struct xdp_rxq_info xdp_rxq
;
691 } ____cacheline_aligned_in_smp
;
694 * RX queue sysfs structures and functions.
696 struct rx_queue_attribute
{
697 struct attribute attr
;
698 ssize_t (*show
)(struct netdev_rx_queue
*queue
, char *buf
);
699 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
700 const char *buf
, size_t len
);
705 * This structure holds an XPS map which can be of variable length. The
706 * map is an array of queues.
710 unsigned int alloc_len
;
714 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
715 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
716 - sizeof(struct xps_map)) / sizeof(u16))
719 * This structure holds all XPS maps for device. Maps are indexed by CPU.
721 struct xps_dev_maps
{
723 struct xps_map __rcu
*cpu_map
[0];
725 #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
726 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
727 #endif /* CONFIG_XPS */
729 #define TC_MAX_QUEUE 16
730 #define TC_BITMASK 15
731 /* HW offloaded queuing disciplines txq count and offset maps */
732 struct netdev_tc_txq
{
737 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
739 * This structure is to hold information about the device
740 * configured to run FCoE protocol stack.
742 struct netdev_fcoe_hbainfo
{
743 char manufacturer
[64];
744 char serial_number
[64];
745 char hardware_version
[64];
746 char driver_version
[64];
747 char optionrom_version
[64];
748 char firmware_version
[64];
750 char model_description
[256];
754 #define MAX_PHYS_ITEM_ID_LEN 32
756 /* This structure holds a unique identifier to identify some
757 * physical item (port for example) used by a netdevice.
759 struct netdev_phys_item_id
{
760 unsigned char id
[MAX_PHYS_ITEM_ID_LEN
];
761 unsigned char id_len
;
764 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id
*a
,
765 struct netdev_phys_item_id
*b
)
767 return a
->id_len
== b
->id_len
&&
768 memcmp(a
->id
, b
->id
, a
->id_len
) == 0;
771 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
772 struct sk_buff
*skb
);
775 TC_SETUP_QDISC_MQPRIO
,
778 TC_SETUP_CLSMATCHALL
,
786 /* These structures hold the attributes of bpf state that are being passed
787 * to the netdevice through the bpf op.
789 enum bpf_netdev_command
{
790 /* Set or clear a bpf program used in the earliest stages of packet
791 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
792 * is responsible for calling bpf_prog_put on any old progs that are
793 * stored. In case of error, the callee need not release the new prog
794 * reference, but on success it takes ownership and must bpf_prog_put
795 * when it is no longer used.
799 /* Check if a bpf program is set on the device. The callee should
800 * set @prog_attached to one of XDP_ATTACHED_* values, note that "true"
801 * is equivalent to XDP_ATTACHED_DRV.
804 /* BPF program for offload callbacks, invoked at program load time. */
805 BPF_OFFLOAD_VERIFIER_PREP
,
806 BPF_OFFLOAD_TRANSLATE
,
808 BPF_OFFLOAD_MAP_ALLOC
,
809 BPF_OFFLOAD_MAP_FREE
,
812 struct bpf_prog_offload_ops
;
813 struct netlink_ext_ack
;
816 enum bpf_netdev_command command
;
821 struct bpf_prog
*prog
;
822 struct netlink_ext_ack
*extack
;
828 /* flags with which program was installed */
831 /* BPF_OFFLOAD_VERIFIER_PREP */
833 struct bpf_prog
*prog
;
834 const struct bpf_prog_offload_ops
*ops
; /* callee set */
836 /* BPF_OFFLOAD_TRANSLATE, BPF_OFFLOAD_DESTROY */
838 struct bpf_prog
*prog
;
840 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
842 struct bpf_offloaded_map
*offmap
;
847 #ifdef CONFIG_XFRM_OFFLOAD
849 int (*xdo_dev_state_add
) (struct xfrm_state
*x
);
850 void (*xdo_dev_state_delete
) (struct xfrm_state
*x
);
851 void (*xdo_dev_state_free
) (struct xfrm_state
*x
);
852 bool (*xdo_dev_offload_ok
) (struct sk_buff
*skb
,
853 struct xfrm_state
*x
);
854 void (*xdo_dev_state_advance_esn
) (struct xfrm_state
*x
);
859 struct rcu_head rcuhead
;
864 * This structure defines the management hooks for network devices.
865 * The following hooks can be defined; unless noted otherwise, they are
866 * optional and can be filled with a null pointer.
868 * int (*ndo_init)(struct net_device *dev);
869 * This function is called once when a network device is registered.
870 * The network device can use this for any late stage initialization
871 * or semantic validation. It can fail with an error code which will
872 * be propagated back to register_netdev.
874 * void (*ndo_uninit)(struct net_device *dev);
875 * This function is called when device is unregistered or when registration
876 * fails. It is not called if init fails.
878 * int (*ndo_open)(struct net_device *dev);
879 * This function is called when a network device transitions to the up
882 * int (*ndo_stop)(struct net_device *dev);
883 * This function is called when a network device transitions to the down
886 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
887 * struct net_device *dev);
888 * Called when a packet needs to be transmitted.
889 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
890 * the queue before that can happen; it's for obsolete devices and weird
891 * corner cases, but the stack really does a non-trivial amount
892 * of useless work if you return NETDEV_TX_BUSY.
893 * Required; cannot be NULL.
895 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
896 * struct net_device *dev
897 * netdev_features_t features);
898 * Called by core transmit path to determine if device is capable of
899 * performing offload operations on a given packet. This is to give
900 * the device an opportunity to implement any restrictions that cannot
901 * be otherwise expressed by feature flags. The check is called with
902 * the set of features that the stack has calculated and it returns
903 * those the driver believes to be appropriate.
905 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
906 * void *accel_priv, select_queue_fallback_t fallback);
907 * Called to decide which queue to use when device supports multiple
910 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
911 * This function is called to allow device receiver to make
912 * changes to configuration when multicast or promiscuous is enabled.
914 * void (*ndo_set_rx_mode)(struct net_device *dev);
915 * This function is called device changes address list filtering.
916 * If driver handles unicast address filtering, it should set
917 * IFF_UNICAST_FLT in its priv_flags.
919 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
920 * This function is called when the Media Access Control address
921 * needs to be changed. If this interface is not defined, the
922 * MAC address can not be changed.
924 * int (*ndo_validate_addr)(struct net_device *dev);
925 * Test if Media Access Control address is valid for the device.
927 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
928 * Called when a user requests an ioctl which can't be handled by
929 * the generic interface code. If not defined ioctls return
930 * not supported error code.
932 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
933 * Used to set network devices bus interface parameters. This interface
934 * is retained for legacy reasons; new devices should use the bus
935 * interface (PCI) for low level management.
937 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
938 * Called when a user wants to change the Maximum Transfer Unit
941 * void (*ndo_tx_timeout)(struct net_device *dev);
942 * Callback used when the transmitter has not made any progress
943 * for dev->watchdog ticks.
945 * void (*ndo_get_stats64)(struct net_device *dev,
946 * struct rtnl_link_stats64 *storage);
947 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
948 * Called when a user wants to get the network device usage
949 * statistics. Drivers must do one of the following:
950 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
951 * rtnl_link_stats64 structure passed by the caller.
952 * 2. Define @ndo_get_stats to update a net_device_stats structure
953 * (which should normally be dev->stats) and return a pointer to
954 * it. The structure may be changed asynchronously only if each
955 * field is written atomically.
956 * 3. Update dev->stats asynchronously and atomically, and define
959 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
960 * Return true if this device supports offload stats of this attr_id.
962 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
964 * Get statistics for offload operations by attr_id. Write it into the
967 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
968 * If device supports VLAN filtering this function is called when a
969 * VLAN id is registered.
971 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
972 * If device supports VLAN filtering this function is called when a
973 * VLAN id is unregistered.
975 * void (*ndo_poll_controller)(struct net_device *dev);
977 * SR-IOV management functions.
978 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
979 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
980 * u8 qos, __be16 proto);
981 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
983 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
984 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
985 * int (*ndo_get_vf_config)(struct net_device *dev,
986 * int vf, struct ifla_vf_info *ivf);
987 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
988 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
989 * struct nlattr *port[]);
991 * Enable or disable the VF ability to query its RSS Redirection Table and
992 * Hash Key. This is needed since on some devices VF share this information
993 * with PF and querying it may introduce a theoretical security risk.
994 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
995 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
996 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
998 * Called to setup any 'tc' scheduler, classifier or action on @dev.
999 * This is always called from the stack with the rtnl lock held and netif
1000 * tx queues stopped. This allows the netdevice to perform queue
1001 * management safely.
1003 * Fiber Channel over Ethernet (FCoE) offload functions.
1004 * int (*ndo_fcoe_enable)(struct net_device *dev);
1005 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1006 * so the underlying device can perform whatever needed configuration or
1007 * initialization to support acceleration of FCoE traffic.
1009 * int (*ndo_fcoe_disable)(struct net_device *dev);
1010 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1011 * so the underlying device can perform whatever needed clean-ups to
1012 * stop supporting acceleration of FCoE traffic.
1014 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1015 * struct scatterlist *sgl, unsigned int sgc);
1016 * Called when the FCoE Initiator wants to initialize an I/O that
1017 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1018 * perform necessary setup and returns 1 to indicate the device is set up
1019 * successfully to perform DDP on this I/O, otherwise this returns 0.
1021 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1022 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1023 * indicated by the FC exchange id 'xid', so the underlying device can
1024 * clean up and reuse resources for later DDP requests.
1026 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1027 * struct scatterlist *sgl, unsigned int sgc);
1028 * Called when the FCoE Target wants to initialize an I/O that
1029 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1030 * perform necessary setup and returns 1 to indicate the device is set up
1031 * successfully to perform DDP on this I/O, otherwise this returns 0.
1033 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1034 * struct netdev_fcoe_hbainfo *hbainfo);
1035 * Called when the FCoE Protocol stack wants information on the underlying
1036 * device. This information is utilized by the FCoE protocol stack to
1037 * register attributes with Fiber Channel management service as per the
1038 * FC-GS Fabric Device Management Information(FDMI) specification.
1040 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1041 * Called when the underlying device wants to override default World Wide
1042 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1043 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1044 * protocol stack to use.
1047 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1048 * u16 rxq_index, u32 flow_id);
1049 * Set hardware filter for RFS. rxq_index is the target queue index;
1050 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1051 * Return the filter ID on success, or a negative error code.
1053 * Slave management functions (for bridge, bonding, etc).
1054 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1055 * Called to make another netdev an underling.
1057 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1058 * Called to release previously enslaved netdev.
1060 * Feature/offload setting functions.
1061 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1062 * netdev_features_t features);
1063 * Adjusts the requested feature flags according to device-specific
1064 * constraints, and returns the resulting flags. Must not modify
1067 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1068 * Called to update device configuration to new features. Passed
1069 * feature set might be less than what was returned by ndo_fix_features()).
1070 * Must return >0 or -errno if it changed dev->features itself.
1072 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1073 * struct net_device *dev,
1074 * const unsigned char *addr, u16 vid, u16 flags)
1075 * Adds an FDB entry to dev for addr.
1076 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1077 * struct net_device *dev,
1078 * const unsigned char *addr, u16 vid)
1079 * Deletes the FDB entry from dev coresponding to addr.
1080 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1081 * struct net_device *dev, struct net_device *filter_dev,
1083 * Used to add FDB entries to dump requests. Implementers should add
1084 * entries to skb and update idx with the number of entries.
1086 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1088 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1089 * struct net_device *dev, u32 filter_mask,
1091 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1094 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1095 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1096 * which do not represent real hardware may define this to allow their
1097 * userspace components to manage their virtual carrier state. Devices
1098 * that determine carrier state from physical hardware properties (eg
1099 * network cables) or protocol-dependent mechanisms (eg
1100 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1102 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1103 * struct netdev_phys_item_id *ppid);
1104 * Called to get ID of physical port of this device. If driver does
1105 * not implement this, it is assumed that the hw is not able to have
1106 * multiple net devices on single physical port.
1108 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1109 * struct udp_tunnel_info *ti);
1110 * Called by UDP tunnel to notify a driver about the UDP port and socket
1111 * address family that a UDP tunnel is listnening to. It is called only
1112 * when a new port starts listening. The operation is protected by the
1115 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1116 * struct udp_tunnel_info *ti);
1117 * Called by UDP tunnel to notify the driver about a UDP port and socket
1118 * address family that the UDP tunnel is not listening to anymore. The
1119 * operation is protected by the RTNL.
1121 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1122 * struct net_device *dev)
1123 * Called by upper layer devices to accelerate switching or other
1124 * station functionality into hardware. 'pdev is the lowerdev
1125 * to use for the offload and 'dev' is the net device that will
1126 * back the offload. Returns a pointer to the private structure
1127 * the upper layer will maintain.
1128 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1129 * Called by upper layer device to delete the station created
1130 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1131 * the station and priv is the structure returned by the add
1133 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1134 * int queue_index, u32 maxrate);
1135 * Called when a user wants to set a max-rate limitation of specific
1137 * int (*ndo_get_iflink)(const struct net_device *dev);
1138 * Called to get the iflink value of this device.
1139 * void (*ndo_change_proto_down)(struct net_device *dev,
1141 * This function is used to pass protocol port error state information
1142 * to the switch driver. The switch driver can react to the proto_down
1143 * by doing a phys down on the associated switch port.
1144 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1145 * This function is used to get egress tunnel information for given skb.
1146 * This is useful for retrieving outer tunnel header parameters while
1148 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1149 * This function is used to specify the headroom that the skb must
1150 * consider when allocation skb during packet reception. Setting
1151 * appropriate rx headroom value allows avoiding skb head copy on
1152 * forward. Setting a negative value resets the rx headroom to the
1154 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1155 * This function is used to set or query state related to XDP on the
1156 * netdevice and manage BPF offload. See definition of
1157 * enum bpf_netdev_command for details.
1158 * int (*ndo_xdp_xmit)(struct net_device *dev, struct xdp_buff *xdp);
1159 * This function is used to submit a XDP packet for transmit on a
1161 * void (*ndo_xdp_flush)(struct net_device *dev);
1162 * This function is used to inform the driver to flush a particular
1163 * xdp tx queue. Must be called on same CPU as xdp_xmit.
1165 struct net_device_ops
{
1166 int (*ndo_init
)(struct net_device
*dev
);
1167 void (*ndo_uninit
)(struct net_device
*dev
);
1168 int (*ndo_open
)(struct net_device
*dev
);
1169 int (*ndo_stop
)(struct net_device
*dev
);
1170 netdev_tx_t (*ndo_start_xmit
)(struct sk_buff
*skb
,
1171 struct net_device
*dev
);
1172 netdev_features_t (*ndo_features_check
)(struct sk_buff
*skb
,
1173 struct net_device
*dev
,
1174 netdev_features_t features
);
1175 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1176 struct sk_buff
*skb
,
1178 select_queue_fallback_t fallback
);
1179 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1181 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1182 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1184 int (*ndo_validate_addr
)(struct net_device
*dev
);
1185 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1186 struct ifreq
*ifr
, int cmd
);
1187 int (*ndo_set_config
)(struct net_device
*dev
,
1189 int (*ndo_change_mtu
)(struct net_device
*dev
,
1191 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1192 struct neigh_parms
*);
1193 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1195 void (*ndo_get_stats64
)(struct net_device
*dev
,
1196 struct rtnl_link_stats64
*storage
);
1197 bool (*ndo_has_offload_stats
)(const struct net_device
*dev
, int attr_id
);
1198 int (*ndo_get_offload_stats
)(int attr_id
,
1199 const struct net_device
*dev
,
1201 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1203 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1204 __be16 proto
, u16 vid
);
1205 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1206 __be16 proto
, u16 vid
);
1207 #ifdef CONFIG_NET_POLL_CONTROLLER
1208 void (*ndo_poll_controller
)(struct net_device
*dev
);
1209 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1210 struct netpoll_info
*info
);
1211 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1213 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1214 int queue
, u8
*mac
);
1215 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1216 int queue
, u16 vlan
,
1217 u8 qos
, __be16 proto
);
1218 int (*ndo_set_vf_rate
)(struct net_device
*dev
,
1219 int vf
, int min_tx_rate
,
1221 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1222 int vf
, bool setting
);
1223 int (*ndo_set_vf_trust
)(struct net_device
*dev
,
1224 int vf
, bool setting
);
1225 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1227 struct ifla_vf_info
*ivf
);
1228 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1229 int vf
, int link_state
);
1230 int (*ndo_get_vf_stats
)(struct net_device
*dev
,
1232 struct ifla_vf_stats
1234 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1236 struct nlattr
*port
[]);
1237 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1238 int vf
, struct sk_buff
*skb
);
1239 int (*ndo_set_vf_guid
)(struct net_device
*dev
,
1242 int (*ndo_set_vf_rss_query_en
)(
1243 struct net_device
*dev
,
1244 int vf
, bool setting
);
1245 int (*ndo_setup_tc
)(struct net_device
*dev
,
1246 enum tc_setup_type type
,
1248 #if IS_ENABLED(CONFIG_FCOE)
1249 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1250 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1251 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1253 struct scatterlist
*sgl
,
1255 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1257 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1259 struct scatterlist
*sgl
,
1261 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1262 struct netdev_fcoe_hbainfo
*hbainfo
);
1265 #if IS_ENABLED(CONFIG_LIBFCOE)
1266 #define NETDEV_FCOE_WWNN 0
1267 #define NETDEV_FCOE_WWPN 1
1268 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1269 u64
*wwn
, int type
);
1272 #ifdef CONFIG_RFS_ACCEL
1273 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1274 const struct sk_buff
*skb
,
1278 int (*ndo_add_slave
)(struct net_device
*dev
,
1279 struct net_device
*slave_dev
,
1280 struct netlink_ext_ack
*extack
);
1281 int (*ndo_del_slave
)(struct net_device
*dev
,
1282 struct net_device
*slave_dev
);
1283 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1284 netdev_features_t features
);
1285 int (*ndo_set_features
)(struct net_device
*dev
,
1286 netdev_features_t features
);
1287 int (*ndo_neigh_construct
)(struct net_device
*dev
,
1288 struct neighbour
*n
);
1289 void (*ndo_neigh_destroy
)(struct net_device
*dev
,
1290 struct neighbour
*n
);
1292 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1293 struct nlattr
*tb
[],
1294 struct net_device
*dev
,
1295 const unsigned char *addr
,
1298 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1299 struct nlattr
*tb
[],
1300 struct net_device
*dev
,
1301 const unsigned char *addr
,
1303 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1304 struct netlink_callback
*cb
,
1305 struct net_device
*dev
,
1306 struct net_device
*filter_dev
,
1309 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1310 struct nlmsghdr
*nlh
,
1312 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1314 struct net_device
*dev
,
1317 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1318 struct nlmsghdr
*nlh
,
1320 int (*ndo_change_carrier
)(struct net_device
*dev
,
1322 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1323 struct netdev_phys_item_id
*ppid
);
1324 int (*ndo_get_phys_port_name
)(struct net_device
*dev
,
1325 char *name
, size_t len
);
1326 void (*ndo_udp_tunnel_add
)(struct net_device
*dev
,
1327 struct udp_tunnel_info
*ti
);
1328 void (*ndo_udp_tunnel_del
)(struct net_device
*dev
,
1329 struct udp_tunnel_info
*ti
);
1330 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1331 struct net_device
*dev
);
1332 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1335 int (*ndo_get_lock_subclass
)(struct net_device
*dev
);
1336 int (*ndo_set_tx_maxrate
)(struct net_device
*dev
,
1339 int (*ndo_get_iflink
)(const struct net_device
*dev
);
1340 int (*ndo_change_proto_down
)(struct net_device
*dev
,
1342 int (*ndo_fill_metadata_dst
)(struct net_device
*dev
,
1343 struct sk_buff
*skb
);
1344 void (*ndo_set_rx_headroom
)(struct net_device
*dev
,
1345 int needed_headroom
);
1346 int (*ndo_bpf
)(struct net_device
*dev
,
1347 struct netdev_bpf
*bpf
);
1348 int (*ndo_xdp_xmit
)(struct net_device
*dev
,
1349 struct xdp_buff
*xdp
);
1350 void (*ndo_xdp_flush
)(struct net_device
*dev
);
1354 * enum net_device_priv_flags - &struct net_device priv_flags
1356 * These are the &struct net_device, they are only set internally
1357 * by drivers and used in the kernel. These flags are invisible to
1358 * userspace; this means that the order of these flags can change
1359 * during any kernel release.
1361 * You should have a pretty good reason to be extending these flags.
1363 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1364 * @IFF_EBRIDGE: Ethernet bridging device
1365 * @IFF_BONDING: bonding master or slave
1366 * @IFF_ISATAP: ISATAP interface (RFC4214)
1367 * @IFF_WAN_HDLC: WAN HDLC device
1368 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1370 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1371 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1372 * @IFF_MACVLAN_PORT: device used as macvlan port
1373 * @IFF_BRIDGE_PORT: device used as bridge port
1374 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1375 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1376 * @IFF_UNICAST_FLT: Supports unicast filtering
1377 * @IFF_TEAM_PORT: device used as team port
1378 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1379 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1380 * change when it's running
1381 * @IFF_MACVLAN: Macvlan device
1382 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1383 * underlying stacked devices
1384 * @IFF_IPVLAN_MASTER: IPvlan master device
1385 * @IFF_IPVLAN_SLAVE: IPvlan slave device
1386 * @IFF_L3MDEV_MASTER: device is an L3 master device
1387 * @IFF_NO_QUEUE: device can run without qdisc attached
1388 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1389 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1390 * @IFF_TEAM: device is a team device
1391 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1392 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1393 * entity (i.e. the master device for bridged veth)
1394 * @IFF_MACSEC: device is a MACsec device
1396 enum netdev_priv_flags
{
1397 IFF_802_1Q_VLAN
= 1<<0,
1401 IFF_WAN_HDLC
= 1<<4,
1402 IFF_XMIT_DST_RELEASE
= 1<<5,
1403 IFF_DONT_BRIDGE
= 1<<6,
1404 IFF_DISABLE_NETPOLL
= 1<<7,
1405 IFF_MACVLAN_PORT
= 1<<8,
1406 IFF_BRIDGE_PORT
= 1<<9,
1407 IFF_OVS_DATAPATH
= 1<<10,
1408 IFF_TX_SKB_SHARING
= 1<<11,
1409 IFF_UNICAST_FLT
= 1<<12,
1410 IFF_TEAM_PORT
= 1<<13,
1411 IFF_SUPP_NOFCS
= 1<<14,
1412 IFF_LIVE_ADDR_CHANGE
= 1<<15,
1413 IFF_MACVLAN
= 1<<16,
1414 IFF_XMIT_DST_RELEASE_PERM
= 1<<17,
1415 IFF_IPVLAN_MASTER
= 1<<18,
1416 IFF_IPVLAN_SLAVE
= 1<<19,
1417 IFF_L3MDEV_MASTER
= 1<<20,
1418 IFF_NO_QUEUE
= 1<<21,
1419 IFF_OPENVSWITCH
= 1<<22,
1420 IFF_L3MDEV_SLAVE
= 1<<23,
1422 IFF_RXFH_CONFIGURED
= 1<<25,
1423 IFF_PHONY_HEADROOM
= 1<<26,
1427 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1428 #define IFF_EBRIDGE IFF_EBRIDGE
1429 #define IFF_BONDING IFF_BONDING
1430 #define IFF_ISATAP IFF_ISATAP
1431 #define IFF_WAN_HDLC IFF_WAN_HDLC
1432 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1433 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1434 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1435 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1436 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1437 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1438 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1439 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1440 #define IFF_TEAM_PORT IFF_TEAM_PORT
1441 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1442 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1443 #define IFF_MACVLAN IFF_MACVLAN
1444 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1445 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1446 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1447 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1448 #define IFF_NO_QUEUE IFF_NO_QUEUE
1449 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1450 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1451 #define IFF_TEAM IFF_TEAM
1452 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1453 #define IFF_MACSEC IFF_MACSEC
1456 * struct net_device - The DEVICE structure.
1458 * Actually, this whole structure is a big mistake. It mixes I/O
1459 * data with strictly "high-level" data, and it has to know about
1460 * almost every data structure used in the INET module.
1462 * @name: This is the first field of the "visible" part of this structure
1463 * (i.e. as seen by users in the "Space.c" file). It is the name
1466 * @name_hlist: Device name hash chain, please keep it close to name[]
1467 * @ifalias: SNMP alias
1468 * @mem_end: Shared memory end
1469 * @mem_start: Shared memory start
1470 * @base_addr: Device I/O address
1471 * @irq: Device IRQ number
1473 * @state: Generic network queuing layer state, see netdev_state_t
1474 * @dev_list: The global list of network devices
1475 * @napi_list: List entry used for polling NAPI devices
1476 * @unreg_list: List entry when we are unregistering the
1477 * device; see the function unregister_netdev
1478 * @close_list: List entry used when we are closing the device
1479 * @ptype_all: Device-specific packet handlers for all protocols
1480 * @ptype_specific: Device-specific, protocol-specific packet handlers
1482 * @adj_list: Directly linked devices, like slaves for bonding
1483 * @features: Currently active device features
1484 * @hw_features: User-changeable features
1486 * @wanted_features: User-requested features
1487 * @vlan_features: Mask of features inheritable by VLAN devices
1489 * @hw_enc_features: Mask of features inherited by encapsulating devices
1490 * This field indicates what encapsulation
1491 * offloads the hardware is capable of doing,
1492 * and drivers will need to set them appropriately.
1494 * @mpls_features: Mask of features inheritable by MPLS
1496 * @ifindex: interface index
1497 * @group: The group the device belongs to
1499 * @stats: Statistics struct, which was left as a legacy, use
1500 * rtnl_link_stats64 instead
1502 * @rx_dropped: Dropped packets by core network,
1503 * do not use this in drivers
1504 * @tx_dropped: Dropped packets by core network,
1505 * do not use this in drivers
1506 * @rx_nohandler: nohandler dropped packets by core network on
1507 * inactive devices, do not use this in drivers
1508 * @carrier_up_count: Number of times the carrier has been up
1509 * @carrier_down_count: Number of times the carrier has been down
1511 * @wireless_handlers: List of functions to handle Wireless Extensions,
1513 * see <net/iw_handler.h> for details.
1514 * @wireless_data: Instance data managed by the core of wireless extensions
1516 * @netdev_ops: Includes several pointers to callbacks,
1517 * if one wants to override the ndo_*() functions
1518 * @ethtool_ops: Management operations
1519 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1520 * discovery handling. Necessary for e.g. 6LoWPAN.
1521 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1522 * of Layer 2 headers.
1524 * @flags: Interface flags (a la BSD)
1525 * @priv_flags: Like 'flags' but invisible to userspace,
1526 * see if.h for the definitions
1527 * @gflags: Global flags ( kept as legacy )
1528 * @padded: How much padding added by alloc_netdev()
1529 * @operstate: RFC2863 operstate
1530 * @link_mode: Mapping policy to operstate
1531 * @if_port: Selectable AUI, TP, ...
1533 * @mtu: Interface MTU value
1534 * @min_mtu: Interface Minimum MTU value
1535 * @max_mtu: Interface Maximum MTU value
1536 * @type: Interface hardware type
1537 * @hard_header_len: Maximum hardware header length.
1538 * @min_header_len: Minimum hardware header length
1540 * @needed_headroom: Extra headroom the hardware may need, but not in all
1541 * cases can this be guaranteed
1542 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1543 * cases can this be guaranteed. Some cases also use
1544 * LL_MAX_HEADER instead to allocate the skb
1546 * interface address info:
1548 * @perm_addr: Permanent hw address
1549 * @addr_assign_type: Hw address assignment type
1550 * @addr_len: Hardware address length
1551 * @neigh_priv_len: Used in neigh_alloc()
1552 * @dev_id: Used to differentiate devices that share
1553 * the same link layer address
1554 * @dev_port: Used to differentiate devices that share
1556 * @addr_list_lock: XXX: need comments on this one
1557 * @uc_promisc: Counter that indicates promiscuous mode
1558 * has been enabled due to the need to listen to
1559 * additional unicast addresses in a device that
1560 * does not implement ndo_set_rx_mode()
1561 * @uc: unicast mac addresses
1562 * @mc: multicast mac addresses
1563 * @dev_addrs: list of device hw addresses
1564 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1565 * @promiscuity: Number of times the NIC is told to work in
1566 * promiscuous mode; if it becomes 0 the NIC will
1567 * exit promiscuous mode
1568 * @allmulti: Counter, enables or disables allmulticast mode
1570 * @vlan_info: VLAN info
1571 * @dsa_ptr: dsa specific data
1572 * @tipc_ptr: TIPC specific data
1573 * @atalk_ptr: AppleTalk link
1574 * @ip_ptr: IPv4 specific data
1575 * @dn_ptr: DECnet specific data
1576 * @ip6_ptr: IPv6 specific data
1577 * @ax25_ptr: AX.25 specific data
1578 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1580 * @dev_addr: Hw address (before bcast,
1581 * because most packets are unicast)
1583 * @_rx: Array of RX queues
1584 * @num_rx_queues: Number of RX queues
1585 * allocated at register_netdev() time
1586 * @real_num_rx_queues: Number of RX queues currently active in device
1588 * @rx_handler: handler for received packets
1589 * @rx_handler_data: XXX: need comments on this one
1590 * @miniq_ingress: ingress/clsact qdisc specific data for
1591 * ingress processing
1592 * @ingress_queue: XXX: need comments on this one
1593 * @broadcast: hw bcast address
1595 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1596 * indexed by RX queue number. Assigned by driver.
1597 * This must only be set if the ndo_rx_flow_steer
1598 * operation is defined
1599 * @index_hlist: Device index hash chain
1601 * @_tx: Array of TX queues
1602 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1603 * @real_num_tx_queues: Number of TX queues currently active in device
1604 * @qdisc: Root qdisc from userspace point of view
1605 * @tx_queue_len: Max frames per queue allowed
1606 * @tx_global_lock: XXX: need comments on this one
1608 * @xps_maps: XXX: need comments on this one
1609 * @miniq_egress: clsact qdisc specific data for
1611 * @watchdog_timeo: Represents the timeout that is used by
1612 * the watchdog (see dev_watchdog())
1613 * @watchdog_timer: List of timers
1615 * @pcpu_refcnt: Number of references to this device
1616 * @todo_list: Delayed register/unregister
1617 * @link_watch_list: XXX: need comments on this one
1619 * @reg_state: Register/unregister state machine
1620 * @dismantle: Device is going to be freed
1621 * @rtnl_link_state: This enum represents the phases of creating
1624 * @needs_free_netdev: Should unregister perform free_netdev?
1625 * @priv_destructor: Called from unregister
1626 * @npinfo: XXX: need comments on this one
1627 * @nd_net: Network namespace this network device is inside
1629 * @ml_priv: Mid-layer private
1630 * @lstats: Loopback statistics
1631 * @tstats: Tunnel statistics
1632 * @dstats: Dummy statistics
1633 * @vstats: Virtual ethernet statistics
1638 * @dev: Class/net/name entry
1639 * @sysfs_groups: Space for optional device, statistics and wireless
1642 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1643 * @rtnl_link_ops: Rtnl_link_ops
1645 * @gso_max_size: Maximum size of generic segmentation offload
1646 * @gso_max_segs: Maximum number of segments that can be passed to the
1649 * @dcbnl_ops: Data Center Bridging netlink ops
1650 * @num_tc: Number of traffic classes in the net device
1651 * @tc_to_txq: XXX: need comments on this one
1652 * @prio_tc_map: XXX: need comments on this one
1654 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1656 * @priomap: XXX: need comments on this one
1657 * @phydev: Physical device may attach itself
1658 * for hardware timestamping
1660 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1661 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1663 * @proto_down: protocol port state information can be sent to the
1664 * switch driver and used to set the phys state of the
1667 * FIXME: cleanup struct net_device such that network protocol info
1672 char name
[IFNAMSIZ
];
1673 struct hlist_node name_hlist
;
1674 struct dev_ifalias __rcu
*ifalias
;
1676 * I/O specific fields
1677 * FIXME: Merge these and struct ifmap into one
1679 unsigned long mem_end
;
1680 unsigned long mem_start
;
1681 unsigned long base_addr
;
1685 * Some hardware also needs these fields (state,dev_list,
1686 * napi_list,unreg_list,close_list) but they are not
1687 * part of the usual set specified in Space.c.
1690 unsigned long state
;
1692 struct list_head dev_list
;
1693 struct list_head napi_list
;
1694 struct list_head unreg_list
;
1695 struct list_head close_list
;
1696 struct list_head ptype_all
;
1697 struct list_head ptype_specific
;
1700 struct list_head upper
;
1701 struct list_head lower
;
1704 netdev_features_t features
;
1705 netdev_features_t hw_features
;
1706 netdev_features_t wanted_features
;
1707 netdev_features_t vlan_features
;
1708 netdev_features_t hw_enc_features
;
1709 netdev_features_t mpls_features
;
1710 netdev_features_t gso_partial_features
;
1715 struct net_device_stats stats
;
1717 atomic_long_t rx_dropped
;
1718 atomic_long_t tx_dropped
;
1719 atomic_long_t rx_nohandler
;
1721 /* Stats to monitor link on/off, flapping */
1722 atomic_t carrier_up_count
;
1723 atomic_t carrier_down_count
;
1725 #ifdef CONFIG_WIRELESS_EXT
1726 const struct iw_handler_def
*wireless_handlers
;
1727 struct iw_public_data
*wireless_data
;
1729 const struct net_device_ops
*netdev_ops
;
1730 const struct ethtool_ops
*ethtool_ops
;
1731 #ifdef CONFIG_NET_SWITCHDEV
1732 const struct switchdev_ops
*switchdev_ops
;
1734 #ifdef CONFIG_NET_L3_MASTER_DEV
1735 const struct l3mdev_ops
*l3mdev_ops
;
1737 #if IS_ENABLED(CONFIG_IPV6)
1738 const struct ndisc_ops
*ndisc_ops
;
1741 #ifdef CONFIG_XFRM_OFFLOAD
1742 const struct xfrmdev_ops
*xfrmdev_ops
;
1745 const struct header_ops
*header_ops
;
1748 unsigned int priv_flags
;
1750 unsigned short gflags
;
1751 unsigned short padded
;
1753 unsigned char operstate
;
1754 unsigned char link_mode
;
1756 unsigned char if_port
;
1760 unsigned int min_mtu
;
1761 unsigned int max_mtu
;
1762 unsigned short type
;
1763 unsigned short hard_header_len
;
1764 unsigned char min_header_len
;
1766 unsigned short needed_headroom
;
1767 unsigned short needed_tailroom
;
1769 /* Interface address info. */
1770 unsigned char perm_addr
[MAX_ADDR_LEN
];
1771 unsigned char addr_assign_type
;
1772 unsigned char addr_len
;
1773 unsigned short neigh_priv_len
;
1774 unsigned short dev_id
;
1775 unsigned short dev_port
;
1776 spinlock_t addr_list_lock
;
1777 unsigned char name_assign_type
;
1779 struct netdev_hw_addr_list uc
;
1780 struct netdev_hw_addr_list mc
;
1781 struct netdev_hw_addr_list dev_addrs
;
1784 struct kset
*queues_kset
;
1786 unsigned int promiscuity
;
1787 unsigned int allmulti
;
1790 /* Protocol-specific pointers */
1792 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1793 struct vlan_info __rcu
*vlan_info
;
1795 #if IS_ENABLED(CONFIG_NET_DSA)
1796 struct dsa_port
*dsa_ptr
;
1798 #if IS_ENABLED(CONFIG_TIPC)
1799 struct tipc_bearer __rcu
*tipc_ptr
;
1802 struct in_device __rcu
*ip_ptr
;
1803 struct dn_dev __rcu
*dn_ptr
;
1804 struct inet6_dev __rcu
*ip6_ptr
;
1806 struct wireless_dev
*ieee80211_ptr
;
1807 struct wpan_dev
*ieee802154_ptr
;
1808 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1809 struct mpls_dev __rcu
*mpls_ptr
;
1813 * Cache lines mostly used on receive path (including eth_type_trans())
1815 /* Interface address info used in eth_type_trans() */
1816 unsigned char *dev_addr
;
1818 struct netdev_rx_queue
*_rx
;
1819 unsigned int num_rx_queues
;
1820 unsigned int real_num_rx_queues
;
1822 struct bpf_prog __rcu
*xdp_prog
;
1823 unsigned long gro_flush_timeout
;
1824 rx_handler_func_t __rcu
*rx_handler
;
1825 void __rcu
*rx_handler_data
;
1827 #ifdef CONFIG_NET_CLS_ACT
1828 struct mini_Qdisc __rcu
*miniq_ingress
;
1830 struct netdev_queue __rcu
*ingress_queue
;
1831 #ifdef CONFIG_NETFILTER_INGRESS
1832 struct nf_hook_entries __rcu
*nf_hooks_ingress
;
1835 unsigned char broadcast
[MAX_ADDR_LEN
];
1836 #ifdef CONFIG_RFS_ACCEL
1837 struct cpu_rmap
*rx_cpu_rmap
;
1839 struct hlist_node index_hlist
;
1842 * Cache lines mostly used on transmit path
1844 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1845 unsigned int num_tx_queues
;
1846 unsigned int real_num_tx_queues
;
1847 struct Qdisc
*qdisc
;
1848 #ifdef CONFIG_NET_SCHED
1849 DECLARE_HASHTABLE (qdisc_hash
, 4);
1851 unsigned int tx_queue_len
;
1852 spinlock_t tx_global_lock
;
1856 struct xps_dev_maps __rcu
*xps_maps
;
1858 #ifdef CONFIG_NET_CLS_ACT
1859 struct mini_Qdisc __rcu
*miniq_egress
;
1862 /* These may be needed for future network-power-down code. */
1863 struct timer_list watchdog_timer
;
1865 int __percpu
*pcpu_refcnt
;
1866 struct list_head todo_list
;
1868 struct list_head link_watch_list
;
1870 enum { NETREG_UNINITIALIZED
=0,
1871 NETREG_REGISTERED
, /* completed register_netdevice */
1872 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1873 NETREG_UNREGISTERED
, /* completed unregister todo */
1874 NETREG_RELEASED
, /* called free_netdev */
1875 NETREG_DUMMY
, /* dummy device for NAPI poll */
1881 RTNL_LINK_INITIALIZED
,
1882 RTNL_LINK_INITIALIZING
,
1883 } rtnl_link_state
:16;
1885 bool needs_free_netdev
;
1886 void (*priv_destructor
)(struct net_device
*dev
);
1888 #ifdef CONFIG_NETPOLL
1889 struct netpoll_info __rcu
*npinfo
;
1892 possible_net_t nd_net
;
1894 /* mid-layer private */
1897 struct pcpu_lstats __percpu
*lstats
;
1898 struct pcpu_sw_netstats __percpu
*tstats
;
1899 struct pcpu_dstats __percpu
*dstats
;
1900 struct pcpu_vstats __percpu
*vstats
;
1903 #if IS_ENABLED(CONFIG_GARP)
1904 struct garp_port __rcu
*garp_port
;
1906 #if IS_ENABLED(CONFIG_MRP)
1907 struct mrp_port __rcu
*mrp_port
;
1911 const struct attribute_group
*sysfs_groups
[4];
1912 const struct attribute_group
*sysfs_rx_queue_group
;
1914 const struct rtnl_link_ops
*rtnl_link_ops
;
1916 /* for setting kernel sock attribute on TCP connection setup */
1917 #define GSO_MAX_SIZE 65536
1918 unsigned int gso_max_size
;
1919 #define GSO_MAX_SEGS 65535
1923 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1926 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1927 u8 prio_tc_map
[TC_BITMASK
+ 1];
1929 #if IS_ENABLED(CONFIG_FCOE)
1930 unsigned int fcoe_ddp_xid
;
1932 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1933 struct netprio_map __rcu
*priomap
;
1935 struct phy_device
*phydev
;
1936 struct lock_class_key
*qdisc_tx_busylock
;
1937 struct lock_class_key
*qdisc_running_key
;
1940 #define to_net_dev(d) container_of(d, struct net_device, dev)
1942 static inline bool netif_elide_gro(const struct net_device
*dev
)
1944 if (!(dev
->features
& NETIF_F_GRO
) || dev
->xdp_prog
)
1949 #define NETDEV_ALIGN 32
1952 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1954 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1958 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1960 if (tc
>= dev
->num_tc
)
1963 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1967 int netdev_txq_to_tc(struct net_device
*dev
, unsigned int txq
);
1968 void netdev_reset_tc(struct net_device
*dev
);
1969 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
);
1970 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
);
1973 int netdev_get_num_tc(struct net_device
*dev
)
1979 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1982 return &dev
->_tx
[index
];
1985 static inline struct netdev_queue
*skb_get_tx_queue(const struct net_device
*dev
,
1986 const struct sk_buff
*skb
)
1988 return netdev_get_tx_queue(dev
, skb_get_queue_mapping(skb
));
1991 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1992 void (*f
)(struct net_device
*,
1993 struct netdev_queue
*,
1999 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2000 f(dev
, &dev
->_tx
[i
], arg
);
2003 #define netdev_lockdep_set_classes(dev) \
2005 static struct lock_class_key qdisc_tx_busylock_key; \
2006 static struct lock_class_key qdisc_running_key; \
2007 static struct lock_class_key qdisc_xmit_lock_key; \
2008 static struct lock_class_key dev_addr_list_lock_key; \
2011 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2012 (dev)->qdisc_running_key = &qdisc_running_key; \
2013 lockdep_set_class(&(dev)->addr_list_lock, \
2014 &dev_addr_list_lock_key); \
2015 for (i = 0; i < (dev)->num_tx_queues; i++) \
2016 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2017 &qdisc_xmit_lock_key); \
2020 struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
2021 struct sk_buff
*skb
,
2024 /* returns the headroom that the master device needs to take in account
2025 * when forwarding to this dev
2027 static inline unsigned netdev_get_fwd_headroom(struct net_device
*dev
)
2029 return dev
->priv_flags
& IFF_PHONY_HEADROOM
? 0 : dev
->needed_headroom
;
2032 static inline void netdev_set_rx_headroom(struct net_device
*dev
, int new_hr
)
2034 if (dev
->netdev_ops
->ndo_set_rx_headroom
)
2035 dev
->netdev_ops
->ndo_set_rx_headroom(dev
, new_hr
);
2038 /* set the device rx headroom to the dev's default */
2039 static inline void netdev_reset_rx_headroom(struct net_device
*dev
)
2041 netdev_set_rx_headroom(dev
, -1);
2045 * Net namespace inlines
2048 struct net
*dev_net(const struct net_device
*dev
)
2050 return read_pnet(&dev
->nd_net
);
2054 void dev_net_set(struct net_device
*dev
, struct net
*net
)
2056 write_pnet(&dev
->nd_net
, net
);
2060 * netdev_priv - access network device private data
2061 * @dev: network device
2063 * Get network device private data
2065 static inline void *netdev_priv(const struct net_device
*dev
)
2067 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
2070 /* Set the sysfs physical device reference for the network logical device
2071 * if set prior to registration will cause a symlink during initialization.
2073 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2075 /* Set the sysfs device type for the network logical device to allow
2076 * fine-grained identification of different network device types. For
2077 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2079 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2081 /* Default NAPI poll() weight
2082 * Device drivers are strongly advised to not use bigger value
2084 #define NAPI_POLL_WEIGHT 64
2087 * netif_napi_add - initialize a NAPI context
2088 * @dev: network device
2089 * @napi: NAPI context
2090 * @poll: polling function
2091 * @weight: default weight
2093 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2094 * *any* of the other NAPI-related functions.
2096 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
2097 int (*poll
)(struct napi_struct
*, int), int weight
);
2100 * netif_tx_napi_add - initialize a NAPI context
2101 * @dev: network device
2102 * @napi: NAPI context
2103 * @poll: polling function
2104 * @weight: default weight
2106 * This variant of netif_napi_add() should be used from drivers using NAPI
2107 * to exclusively poll a TX queue.
2108 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2110 static inline void netif_tx_napi_add(struct net_device
*dev
,
2111 struct napi_struct
*napi
,
2112 int (*poll
)(struct napi_struct
*, int),
2115 set_bit(NAPI_STATE_NO_BUSY_POLL
, &napi
->state
);
2116 netif_napi_add(dev
, napi
, poll
, weight
);
2120 * netif_napi_del - remove a NAPI context
2121 * @napi: NAPI context
2123 * netif_napi_del() removes a NAPI context from the network device NAPI list
2125 void netif_napi_del(struct napi_struct
*napi
);
2127 struct napi_gro_cb
{
2128 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2131 /* Length of frag0. */
2132 unsigned int frag0_len
;
2134 /* This indicates where we are processing relative to skb->data. */
2137 /* This is non-zero if the packet cannot be merged with the new skb. */
2140 /* Save the IP ID here and check when we get to the transport layer */
2143 /* Number of segments aggregated. */
2146 /* Start offset for remote checksum offload */
2147 u16 gro_remcsum_start
;
2149 /* jiffies when first packet was created/queued */
2152 /* Used in ipv6_gro_receive() and foo-over-udp */
2155 /* This is non-zero if the packet may be of the same flow. */
2158 /* Used in tunnel GRO receive */
2161 /* GRO checksum is valid */
2164 /* Number of checksums via CHECKSUM_UNNECESSARY */
2169 #define NAPI_GRO_FREE 1
2170 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2172 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2175 /* Used in GRE, set in fou/gue_gro_receive */
2178 /* Used to determine if flush_id can be ignored */
2181 /* Number of gro_receive callbacks this packet already went through */
2182 u8 recursion_counter
:4;
2186 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2189 /* used in skb_gro_receive() slow path */
2190 struct sk_buff
*last
;
2193 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2195 #define GRO_RECURSION_LIMIT 15
2196 static inline int gro_recursion_inc_test(struct sk_buff
*skb
)
2198 return ++NAPI_GRO_CB(skb
)->recursion_counter
== GRO_RECURSION_LIMIT
;
2201 typedef struct sk_buff
**(*gro_receive_t
)(struct sk_buff
**, struct sk_buff
*);
2202 static inline struct sk_buff
**call_gro_receive(gro_receive_t cb
,
2203 struct sk_buff
**head
,
2204 struct sk_buff
*skb
)
2206 if (unlikely(gro_recursion_inc_test(skb
))) {
2207 NAPI_GRO_CB(skb
)->flush
|= 1;
2211 return cb(head
, skb
);
2214 typedef struct sk_buff
**(*gro_receive_sk_t
)(struct sock
*, struct sk_buff
**,
2216 static inline struct sk_buff
**call_gro_receive_sk(gro_receive_sk_t cb
,
2218 struct sk_buff
**head
,
2219 struct sk_buff
*skb
)
2221 if (unlikely(gro_recursion_inc_test(skb
))) {
2222 NAPI_GRO_CB(skb
)->flush
|= 1;
2226 return cb(sk
, head
, skb
);
2229 struct packet_type
{
2230 __be16 type
; /* This is really htons(ether_type). */
2231 struct net_device
*dev
; /* NULL is wildcarded here */
2232 int (*func
) (struct sk_buff
*,
2233 struct net_device
*,
2234 struct packet_type
*,
2235 struct net_device
*);
2236 bool (*id_match
)(struct packet_type
*ptype
,
2238 void *af_packet_priv
;
2239 struct list_head list
;
2242 struct offload_callbacks
{
2243 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
2244 netdev_features_t features
);
2245 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
2246 struct sk_buff
*skb
);
2247 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
2250 struct packet_offload
{
2251 __be16 type
; /* This is really htons(ether_type). */
2253 struct offload_callbacks callbacks
;
2254 struct list_head list
;
2257 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2258 struct pcpu_sw_netstats
{
2263 struct u64_stats_sync syncp
;
2266 #define __netdev_alloc_pcpu_stats(type, gfp) \
2268 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2271 for_each_possible_cpu(__cpu) { \
2272 typeof(type) *stat; \
2273 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2274 u64_stats_init(&stat->syncp); \
2280 #define netdev_alloc_pcpu_stats(type) \
2281 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2283 enum netdev_lag_tx_type
{
2284 NETDEV_LAG_TX_TYPE_UNKNOWN
,
2285 NETDEV_LAG_TX_TYPE_RANDOM
,
2286 NETDEV_LAG_TX_TYPE_BROADCAST
,
2287 NETDEV_LAG_TX_TYPE_ROUNDROBIN
,
2288 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
,
2289 NETDEV_LAG_TX_TYPE_HASH
,
2292 struct netdev_lag_upper_info
{
2293 enum netdev_lag_tx_type tx_type
;
2296 struct netdev_lag_lower_state_info
{
2301 #include <linux/notifier.h>
2303 /* netdevice notifier chain. Please remember to update the rtnetlink
2304 * notification exclusion list in rtnetlink_event() when adding new
2307 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2308 #define NETDEV_DOWN 0x0002
2309 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2310 detected a hardware crash and restarted
2311 - we can use this eg to kick tcp sessions
2313 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2314 #define NETDEV_REGISTER 0x0005
2315 #define NETDEV_UNREGISTER 0x0006
2316 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2317 #define NETDEV_CHANGEADDR 0x0008
2318 #define NETDEV_GOING_DOWN 0x0009
2319 #define NETDEV_CHANGENAME 0x000A
2320 #define NETDEV_FEAT_CHANGE 0x000B
2321 #define NETDEV_BONDING_FAILOVER 0x000C
2322 #define NETDEV_PRE_UP 0x000D
2323 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2324 #define NETDEV_POST_TYPE_CHANGE 0x000F
2325 #define NETDEV_POST_INIT 0x0010
2326 #define NETDEV_UNREGISTER_FINAL 0x0011
2327 #define NETDEV_RELEASE 0x0012
2328 #define NETDEV_NOTIFY_PEERS 0x0013
2329 #define NETDEV_JOIN 0x0014
2330 #define NETDEV_CHANGEUPPER 0x0015
2331 #define NETDEV_RESEND_IGMP 0x0016
2332 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2333 #define NETDEV_CHANGEINFODATA 0x0018
2334 #define NETDEV_BONDING_INFO 0x0019
2335 #define NETDEV_PRECHANGEUPPER 0x001A
2336 #define NETDEV_CHANGELOWERSTATE 0x001B
2337 #define NETDEV_UDP_TUNNEL_PUSH_INFO 0x001C
2338 #define NETDEV_UDP_TUNNEL_DROP_INFO 0x001D
2339 #define NETDEV_CHANGE_TX_QUEUE_LEN 0x001E
2341 int register_netdevice_notifier(struct notifier_block
*nb
);
2342 int unregister_netdevice_notifier(struct notifier_block
*nb
);
2344 struct netdev_notifier_info
{
2345 struct net_device
*dev
;
2346 struct netlink_ext_ack
*extack
;
2349 struct netdev_notifier_change_info
{
2350 struct netdev_notifier_info info
; /* must be first */
2351 unsigned int flags_changed
;
2354 struct netdev_notifier_changeupper_info
{
2355 struct netdev_notifier_info info
; /* must be first */
2356 struct net_device
*upper_dev
; /* new upper dev */
2357 bool master
; /* is upper dev master */
2358 bool linking
; /* is the notification for link or unlink */
2359 void *upper_info
; /* upper dev info */
2362 struct netdev_notifier_changelowerstate_info
{
2363 struct netdev_notifier_info info
; /* must be first */
2364 void *lower_state_info
; /* is lower dev state */
2367 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
2368 struct net_device
*dev
)
2371 info
->extack
= NULL
;
2374 static inline struct net_device
*
2375 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
2380 static inline struct netlink_ext_ack
*
2381 netdev_notifier_info_to_extack(const struct netdev_notifier_info
*info
)
2383 return info
->extack
;
2386 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
2389 extern rwlock_t dev_base_lock
; /* Device list lock */
2391 #define for_each_netdev(net, d) \
2392 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2393 #define for_each_netdev_reverse(net, d) \
2394 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2395 #define for_each_netdev_rcu(net, d) \
2396 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2397 #define for_each_netdev_safe(net, d, n) \
2398 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2399 #define for_each_netdev_continue(net, d) \
2400 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2401 #define for_each_netdev_continue_rcu(net, d) \
2402 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2403 #define for_each_netdev_in_bond_rcu(bond, slave) \
2404 for_each_netdev_rcu(&init_net, slave) \
2405 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2406 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2408 static inline struct net_device
*next_net_device(struct net_device
*dev
)
2410 struct list_head
*lh
;
2414 lh
= dev
->dev_list
.next
;
2415 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2418 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
2420 struct list_head
*lh
;
2424 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
2425 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2428 static inline struct net_device
*first_net_device(struct net
*net
)
2430 return list_empty(&net
->dev_base_head
) ? NULL
:
2431 net_device_entry(net
->dev_base_head
.next
);
2434 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
2436 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
2438 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2441 int netdev_boot_setup_check(struct net_device
*dev
);
2442 unsigned long netdev_boot_base(const char *prefix
, int unit
);
2443 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
2444 const char *hwaddr
);
2445 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2446 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2447 void dev_add_pack(struct packet_type
*pt
);
2448 void dev_remove_pack(struct packet_type
*pt
);
2449 void __dev_remove_pack(struct packet_type
*pt
);
2450 void dev_add_offload(struct packet_offload
*po
);
2451 void dev_remove_offload(struct packet_offload
*po
);
2453 int dev_get_iflink(const struct net_device
*dev
);
2454 int dev_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
);
2455 struct net_device
*__dev_get_by_flags(struct net
*net
, unsigned short flags
,
2456 unsigned short mask
);
2457 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
2458 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
2459 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
2460 int dev_alloc_name(struct net_device
*dev
, const char *name
);
2461 int dev_open(struct net_device
*dev
);
2462 void dev_close(struct net_device
*dev
);
2463 void dev_close_many(struct list_head
*head
, bool unlink
);
2464 void dev_disable_lro(struct net_device
*dev
);
2465 int dev_loopback_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*newskb
);
2466 int dev_queue_xmit(struct sk_buff
*skb
);
2467 int dev_queue_xmit_accel(struct sk_buff
*skb
, void *accel_priv
);
2468 int register_netdevice(struct net_device
*dev
);
2469 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
2470 void unregister_netdevice_many(struct list_head
*head
);
2471 static inline void unregister_netdevice(struct net_device
*dev
)
2473 unregister_netdevice_queue(dev
, NULL
);
2476 int netdev_refcnt_read(const struct net_device
*dev
);
2477 void free_netdev(struct net_device
*dev
);
2478 void netdev_freemem(struct net_device
*dev
);
2479 void synchronize_net(void);
2480 int init_dummy_netdev(struct net_device
*dev
);
2482 DECLARE_PER_CPU(int, xmit_recursion
);
2483 #define XMIT_RECURSION_LIMIT 10
2485 static inline int dev_recursion_level(void)
2487 return this_cpu_read(xmit_recursion
);
2490 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
2491 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
2492 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
2493 struct net_device
*dev_get_by_napi_id(unsigned int napi_id
);
2494 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
2495 int dev_restart(struct net_device
*dev
);
2496 int skb_gro_receive(struct sk_buff
**head
, struct sk_buff
*skb
);
2498 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
2500 return NAPI_GRO_CB(skb
)->data_offset
;
2503 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
2505 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
2508 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
2510 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2513 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2514 unsigned int offset
)
2516 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2519 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2521 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2524 static inline void skb_gro_frag0_invalidate(struct sk_buff
*skb
)
2526 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2527 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2530 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2531 unsigned int offset
)
2533 if (!pskb_may_pull(skb
, hlen
))
2536 skb_gro_frag0_invalidate(skb
);
2537 return skb
->data
+ offset
;
2540 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2542 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2543 skb_network_offset(skb
);
2546 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2547 const void *start
, unsigned int len
)
2549 if (NAPI_GRO_CB(skb
)->csum_valid
)
2550 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2551 csum_partial(start
, len
, 0));
2554 /* GRO checksum functions. These are logical equivalents of the normal
2555 * checksum functions (in skbuff.h) except that they operate on the GRO
2556 * offsets and fields in sk_buff.
2559 __sum16
__skb_gro_checksum_complete(struct sk_buff
*skb
);
2561 static inline bool skb_at_gro_remcsum_start(struct sk_buff
*skb
)
2563 return (NAPI_GRO_CB(skb
)->gro_remcsum_start
== skb_gro_offset(skb
));
2566 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff
*skb
,
2570 return ((skb
->ip_summed
!= CHECKSUM_PARTIAL
||
2571 skb_checksum_start_offset(skb
) <
2572 skb_gro_offset(skb
)) &&
2573 !skb_at_gro_remcsum_start(skb
) &&
2574 NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2575 (!zero_okay
|| check
));
2578 static inline __sum16
__skb_gro_checksum_validate_complete(struct sk_buff
*skb
,
2581 if (NAPI_GRO_CB(skb
)->csum_valid
&&
2582 !csum_fold(csum_add(psum
, NAPI_GRO_CB(skb
)->csum
)))
2585 NAPI_GRO_CB(skb
)->csum
= psum
;
2587 return __skb_gro_checksum_complete(skb
);
2590 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff
*skb
)
2592 if (NAPI_GRO_CB(skb
)->csum_cnt
> 0) {
2593 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2594 NAPI_GRO_CB(skb
)->csum_cnt
--;
2596 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2597 * verified a new top level checksum or an encapsulated one
2598 * during GRO. This saves work if we fallback to normal path.
2600 __skb_incr_checksum_unnecessary(skb
);
2604 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2607 __sum16 __ret = 0; \
2608 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2609 __ret = __skb_gro_checksum_validate_complete(skb, \
2610 compute_pseudo(skb, proto)); \
2612 skb_gro_incr_csum_unnecessary(skb); \
2616 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2617 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2619 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2621 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2623 #define skb_gro_checksum_simple_validate(skb) \
2624 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2626 static inline bool __skb_gro_checksum_convert_check(struct sk_buff
*skb
)
2628 return (NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2629 !NAPI_GRO_CB(skb
)->csum_valid
);
2632 static inline void __skb_gro_checksum_convert(struct sk_buff
*skb
,
2633 __sum16 check
, __wsum pseudo
)
2635 NAPI_GRO_CB(skb
)->csum
= ~pseudo
;
2636 NAPI_GRO_CB(skb
)->csum_valid
= 1;
2639 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2641 if (__skb_gro_checksum_convert_check(skb)) \
2642 __skb_gro_checksum_convert(skb, check, \
2643 compute_pseudo(skb, proto)); \
2646 struct gro_remcsum
{
2651 static inline void skb_gro_remcsum_init(struct gro_remcsum
*grc
)
2657 static inline void *skb_gro_remcsum_process(struct sk_buff
*skb
, void *ptr
,
2658 unsigned int off
, size_t hdrlen
,
2659 int start
, int offset
,
2660 struct gro_remcsum
*grc
,
2664 size_t plen
= hdrlen
+ max_t(size_t, offset
+ sizeof(u16
), start
);
2666 BUG_ON(!NAPI_GRO_CB(skb
)->csum_valid
);
2669 NAPI_GRO_CB(skb
)->gro_remcsum_start
= off
+ hdrlen
+ start
;
2673 ptr
= skb_gro_header_fast(skb
, off
);
2674 if (skb_gro_header_hard(skb
, off
+ plen
)) {
2675 ptr
= skb_gro_header_slow(skb
, off
+ plen
, off
);
2680 delta
= remcsum_adjust(ptr
+ hdrlen
, NAPI_GRO_CB(skb
)->csum
,
2683 /* Adjust skb->csum since we changed the packet */
2684 NAPI_GRO_CB(skb
)->csum
= csum_add(NAPI_GRO_CB(skb
)->csum
, delta
);
2686 grc
->offset
= off
+ hdrlen
+ offset
;
2692 static inline void skb_gro_remcsum_cleanup(struct sk_buff
*skb
,
2693 struct gro_remcsum
*grc
)
2696 size_t plen
= grc
->offset
+ sizeof(u16
);
2701 ptr
= skb_gro_header_fast(skb
, grc
->offset
);
2702 if (skb_gro_header_hard(skb
, grc
->offset
+ sizeof(u16
))) {
2703 ptr
= skb_gro_header_slow(skb
, plen
, grc
->offset
);
2708 remcsum_unadjust((__sum16
*)ptr
, grc
->delta
);
2711 #ifdef CONFIG_XFRM_OFFLOAD
2712 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
**pp
, int flush
)
2714 if (PTR_ERR(pp
) != -EINPROGRESS
)
2715 NAPI_GRO_CB(skb
)->flush
|= flush
;
2718 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
**pp
, int flush
)
2720 NAPI_GRO_CB(skb
)->flush
|= flush
;
2724 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2725 unsigned short type
,
2726 const void *daddr
, const void *saddr
,
2729 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2732 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2735 static inline int dev_parse_header(const struct sk_buff
*skb
,
2736 unsigned char *haddr
)
2738 const struct net_device
*dev
= skb
->dev
;
2740 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2742 return dev
->header_ops
->parse(skb
, haddr
);
2745 /* ll_header must have at least hard_header_len allocated */
2746 static inline bool dev_validate_header(const struct net_device
*dev
,
2747 char *ll_header
, int len
)
2749 if (likely(len
>= dev
->hard_header_len
))
2751 if (len
< dev
->min_header_len
)
2754 if (capable(CAP_SYS_RAWIO
)) {
2755 memset(ll_header
+ len
, 0, dev
->hard_header_len
- len
);
2759 if (dev
->header_ops
&& dev
->header_ops
->validate
)
2760 return dev
->header_ops
->validate(ll_header
, len
);
2765 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
,
2767 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2768 static inline int unregister_gifconf(unsigned int family
)
2770 return register_gifconf(family
, NULL
);
2773 #ifdef CONFIG_NET_FLOW_LIMIT
2774 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2775 struct sd_flow_limit
{
2777 unsigned int num_buckets
;
2778 unsigned int history_head
;
2779 u16 history
[FLOW_LIMIT_HISTORY
];
2783 extern int netdev_flow_limit_table_len
;
2784 #endif /* CONFIG_NET_FLOW_LIMIT */
2787 * Incoming packets are placed on per-CPU queues
2789 struct softnet_data
{
2790 struct list_head poll_list
;
2791 struct sk_buff_head process_queue
;
2794 unsigned int processed
;
2795 unsigned int time_squeeze
;
2796 unsigned int received_rps
;
2798 struct softnet_data
*rps_ipi_list
;
2800 #ifdef CONFIG_NET_FLOW_LIMIT
2801 struct sd_flow_limit __rcu
*flow_limit
;
2803 struct Qdisc
*output_queue
;
2804 struct Qdisc
**output_queue_tailp
;
2805 struct sk_buff
*completion_queue
;
2806 #ifdef CONFIG_XFRM_OFFLOAD
2807 struct sk_buff_head xfrm_backlog
;
2810 /* input_queue_head should be written by cpu owning this struct,
2811 * and only read by other cpus. Worth using a cache line.
2813 unsigned int input_queue_head ____cacheline_aligned_in_smp
;
2815 /* Elements below can be accessed between CPUs for RPS/RFS */
2816 call_single_data_t csd ____cacheline_aligned_in_smp
;
2817 struct softnet_data
*rps_ipi_next
;
2819 unsigned int input_queue_tail
;
2821 unsigned int dropped
;
2822 struct sk_buff_head input_pkt_queue
;
2823 struct napi_struct backlog
;
2827 static inline void input_queue_head_incr(struct softnet_data
*sd
)
2830 sd
->input_queue_head
++;
2834 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
2835 unsigned int *qtail
)
2838 *qtail
= ++sd
->input_queue_tail
;
2842 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
2844 void __netif_schedule(struct Qdisc
*q
);
2845 void netif_schedule_queue(struct netdev_queue
*txq
);
2847 static inline void netif_tx_schedule_all(struct net_device
*dev
)
2851 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2852 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
2855 static __always_inline
void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
2857 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2861 * netif_start_queue - allow transmit
2862 * @dev: network device
2864 * Allow upper layers to call the device hard_start_xmit routine.
2866 static inline void netif_start_queue(struct net_device
*dev
)
2868 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
2871 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
2875 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2876 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2877 netif_tx_start_queue(txq
);
2881 void netif_tx_wake_queue(struct netdev_queue
*dev_queue
);
2884 * netif_wake_queue - restart transmit
2885 * @dev: network device
2887 * Allow upper layers to call the device hard_start_xmit routine.
2888 * Used for flow control when transmit resources are available.
2890 static inline void netif_wake_queue(struct net_device
*dev
)
2892 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
2895 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
2899 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2900 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2901 netif_tx_wake_queue(txq
);
2905 static __always_inline
void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
2907 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2911 * netif_stop_queue - stop transmitted packets
2912 * @dev: network device
2914 * Stop upper layers calling the device hard_start_xmit routine.
2915 * Used for flow control when transmit resources are unavailable.
2917 static inline void netif_stop_queue(struct net_device
*dev
)
2919 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2922 void netif_tx_stop_all_queues(struct net_device
*dev
);
2924 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2926 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2930 * netif_queue_stopped - test if transmit queue is flowblocked
2931 * @dev: network device
2933 * Test if transmit queue on device is currently unable to send.
2935 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2937 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2940 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2942 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2946 netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2948 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2952 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue
*dev_queue
)
2954 return dev_queue
->state
& QUEUE_STATE_DRV_XOFF_OR_FROZEN
;
2958 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2959 * @dev_queue: pointer to transmit queue
2961 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2962 * to give appropriate hint to the CPU.
2964 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue
*dev_queue
)
2967 prefetchw(&dev_queue
->dql
.num_queued
);
2972 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2973 * @dev_queue: pointer to transmit queue
2975 * BQL enabled drivers might use this helper in their TX completion path,
2976 * to give appropriate hint to the CPU.
2978 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue
*dev_queue
)
2981 prefetchw(&dev_queue
->dql
.limit
);
2985 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2989 dql_queued(&dev_queue
->dql
, bytes
);
2991 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2994 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2997 * The XOFF flag must be set before checking the dql_avail below,
2998 * because in netdev_tx_completed_queue we update the dql_completed
2999 * before checking the XOFF flag.
3003 /* check again in case another CPU has just made room avail */
3004 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
3005 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
3010 * netdev_sent_queue - report the number of bytes queued to hardware
3011 * @dev: network device
3012 * @bytes: number of bytes queued to the hardware device queue
3014 * Report the number of bytes queued for sending/completion to the network
3015 * device hardware queue. @bytes should be a good approximation and should
3016 * exactly match netdev_completed_queue() @bytes
3018 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
3020 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
3023 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
3024 unsigned int pkts
, unsigned int bytes
)
3027 if (unlikely(!bytes
))
3030 dql_completed(&dev_queue
->dql
, bytes
);
3033 * Without the memory barrier there is a small possiblity that
3034 * netdev_tx_sent_queue will miss the update and cause the queue to
3035 * be stopped forever
3039 if (dql_avail(&dev_queue
->dql
) < 0)
3042 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
3043 netif_schedule_queue(dev_queue
);
3048 * netdev_completed_queue - report bytes and packets completed by device
3049 * @dev: network device
3050 * @pkts: actual number of packets sent over the medium
3051 * @bytes: actual number of bytes sent over the medium
3053 * Report the number of bytes and packets transmitted by the network device
3054 * hardware queue over the physical medium, @bytes must exactly match the
3055 * @bytes amount passed to netdev_sent_queue()
3057 static inline void netdev_completed_queue(struct net_device
*dev
,
3058 unsigned int pkts
, unsigned int bytes
)
3060 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
3063 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
3066 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
3072 * netdev_reset_queue - reset the packets and bytes count of a network device
3073 * @dev_queue: network device
3075 * Reset the bytes and packet count of a network device and clear the
3076 * software flow control OFF bit for this network device
3078 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
3080 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
3084 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3085 * @dev: network device
3086 * @queue_index: given tx queue index
3088 * Returns 0 if given tx queue index >= number of device tx queues,
3089 * otherwise returns the originally passed tx queue index.
3091 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
3093 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
3094 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3095 dev
->name
, queue_index
,
3096 dev
->real_num_tx_queues
);
3104 * netif_running - test if up
3105 * @dev: network device
3107 * Test if the device has been brought up.
3109 static inline bool netif_running(const struct net_device
*dev
)
3111 return test_bit(__LINK_STATE_START
, &dev
->state
);
3115 * Routines to manage the subqueues on a device. We only need start,
3116 * stop, and a check if it's stopped. All other device management is
3117 * done at the overall netdevice level.
3118 * Also test the device if we're multiqueue.
3122 * netif_start_subqueue - allow sending packets on subqueue
3123 * @dev: network device
3124 * @queue_index: sub queue index
3126 * Start individual transmit queue of a device with multiple transmit queues.
3128 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
3130 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3132 netif_tx_start_queue(txq
);
3136 * netif_stop_subqueue - stop sending packets on subqueue
3137 * @dev: network device
3138 * @queue_index: sub queue index
3140 * Stop individual transmit queue of a device with multiple transmit queues.
3142 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
3144 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3145 netif_tx_stop_queue(txq
);
3149 * netif_subqueue_stopped - test status of subqueue
3150 * @dev: network device
3151 * @queue_index: sub queue index
3153 * Check individual transmit queue of a device with multiple transmit queues.
3155 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
3158 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3160 return netif_tx_queue_stopped(txq
);
3163 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
3164 struct sk_buff
*skb
)
3166 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
3170 * netif_wake_subqueue - allow sending packets on subqueue
3171 * @dev: network device
3172 * @queue_index: sub queue index
3174 * Resume individual transmit queue of a device with multiple transmit queues.
3176 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
3178 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3180 netif_tx_wake_queue(txq
);
3184 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
3187 static inline int netif_set_xps_queue(struct net_device
*dev
,
3188 const struct cpumask
*mask
,
3195 u16
__skb_tx_hash(const struct net_device
*dev
, struct sk_buff
*skb
,
3196 unsigned int num_tx_queues
);
3199 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
3200 * as a distribution range limit for the returned value.
3202 static inline u16
skb_tx_hash(const struct net_device
*dev
,
3203 struct sk_buff
*skb
)
3205 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
3209 * netif_is_multiqueue - test if device has multiple transmit queues
3210 * @dev: network device
3212 * Check if device has multiple transmit queues
3214 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
3216 return dev
->num_tx_queues
> 1;
3219 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
3222 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
3224 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
3231 static inline struct netdev_rx_queue
*
3232 __netif_get_rx_queue(struct net_device
*dev
, unsigned int rxq
)
3234 return dev
->_rx
+ rxq
;
3238 static inline unsigned int get_netdev_rx_queue_index(
3239 struct netdev_rx_queue
*queue
)
3241 struct net_device
*dev
= queue
->dev
;
3242 int index
= queue
- dev
->_rx
;
3244 BUG_ON(index
>= dev
->num_rx_queues
);
3249 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3250 int netif_get_num_default_rss_queues(void);
3252 enum skb_free_reason
{
3253 SKB_REASON_CONSUMED
,
3257 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
3258 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
3261 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3262 * interrupt context or with hardware interrupts being disabled.
3263 * (in_irq() || irqs_disabled())
3265 * We provide four helpers that can be used in following contexts :
3267 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3268 * replacing kfree_skb(skb)
3270 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3271 * Typically used in place of consume_skb(skb) in TX completion path
3273 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3274 * replacing kfree_skb(skb)
3276 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3277 * and consumed a packet. Used in place of consume_skb(skb)
3279 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
3281 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
3284 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
3286 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
3289 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
3291 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
3294 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
3296 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
3299 void generic_xdp_tx(struct sk_buff
*skb
, struct bpf_prog
*xdp_prog
);
3300 int do_xdp_generic(struct bpf_prog
*xdp_prog
, struct sk_buff
*skb
);
3301 int netif_rx(struct sk_buff
*skb
);
3302 int netif_rx_ni(struct sk_buff
*skb
);
3303 int netif_receive_skb(struct sk_buff
*skb
);
3304 int netif_receive_skb_core(struct sk_buff
*skb
);
3305 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
3306 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
3307 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
3308 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
3309 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
3310 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
3312 static inline void napi_free_frags(struct napi_struct
*napi
)
3314 kfree_skb(napi
->skb
);
3318 bool netdev_is_rx_handler_busy(struct net_device
*dev
);
3319 int netdev_rx_handler_register(struct net_device
*dev
,
3320 rx_handler_func_t
*rx_handler
,
3321 void *rx_handler_data
);
3322 void netdev_rx_handler_unregister(struct net_device
*dev
);
3324 bool dev_valid_name(const char *name
);
3325 int dev_ioctl(struct net
*net
, unsigned int cmd
, struct ifreq
*ifr
,
3326 bool *need_copyout
);
3327 int dev_ifconf(struct net
*net
, struct ifconf
*, int);
3328 int dev_ethtool(struct net
*net
, struct ifreq
*);
3329 unsigned int dev_get_flags(const struct net_device
*);
3330 int __dev_change_flags(struct net_device
*, unsigned int flags
);
3331 int dev_change_flags(struct net_device
*, unsigned int);
3332 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
3333 unsigned int gchanges
);
3334 int dev_change_name(struct net_device
*, const char *);
3335 int dev_set_alias(struct net_device
*, const char *, size_t);
3336 int dev_get_alias(const struct net_device
*, char *, size_t);
3337 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
3338 int __dev_set_mtu(struct net_device
*, int);
3339 int dev_set_mtu(struct net_device
*, int);
3340 int dev_change_tx_queue_len(struct net_device
*, unsigned long);
3341 void dev_set_group(struct net_device
*, int);
3342 int dev_set_mac_address(struct net_device
*, struct sockaddr
*);
3343 int dev_change_carrier(struct net_device
*, bool new_carrier
);
3344 int dev_get_phys_port_id(struct net_device
*dev
,
3345 struct netdev_phys_item_id
*ppid
);
3346 int dev_get_phys_port_name(struct net_device
*dev
,
3347 char *name
, size_t len
);
3348 int dev_change_proto_down(struct net_device
*dev
, bool proto_down
);
3349 struct sk_buff
*validate_xmit_skb_list(struct sk_buff
*skb
, struct net_device
*dev
, bool *again
);
3350 struct sk_buff
*dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
3351 struct netdev_queue
*txq
, int *ret
);
3353 typedef int (*bpf_op_t
)(struct net_device
*dev
, struct netdev_bpf
*bpf
);
3354 int dev_change_xdp_fd(struct net_device
*dev
, struct netlink_ext_ack
*extack
,
3356 void __dev_xdp_query(struct net_device
*dev
, bpf_op_t xdp_op
,
3357 struct netdev_bpf
*xdp
);
3359 int __dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3360 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3361 bool is_skb_forwardable(const struct net_device
*dev
,
3362 const struct sk_buff
*skb
);
3364 static __always_inline
int ____dev_forward_skb(struct net_device
*dev
,
3365 struct sk_buff
*skb
)
3367 if (skb_orphan_frags(skb
, GFP_ATOMIC
) ||
3368 unlikely(!is_skb_forwardable(dev
, skb
))) {
3369 atomic_long_inc(&dev
->rx_dropped
);
3374 skb_scrub_packet(skb
, true);
3379 void dev_queue_xmit_nit(struct sk_buff
*skb
, struct net_device
*dev
);
3381 extern int netdev_budget
;
3382 extern unsigned int netdev_budget_usecs
;
3384 /* Called by rtnetlink.c:rtnl_unlock() */
3385 void netdev_run_todo(void);
3388 * dev_put - release reference to device
3389 * @dev: network device
3391 * Release reference to device to allow it to be freed.
3393 static inline void dev_put(struct net_device
*dev
)
3395 this_cpu_dec(*dev
->pcpu_refcnt
);
3399 * dev_hold - get reference to device
3400 * @dev: network device
3402 * Hold reference to device to keep it from being freed.
3404 static inline void dev_hold(struct net_device
*dev
)
3406 this_cpu_inc(*dev
->pcpu_refcnt
);
3409 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3410 * and _off may be called from IRQ context, but it is caller
3411 * who is responsible for serialization of these calls.
3413 * The name carrier is inappropriate, these functions should really be
3414 * called netif_lowerlayer_*() because they represent the state of any
3415 * kind of lower layer not just hardware media.
3418 void linkwatch_init_dev(struct net_device
*dev
);
3419 void linkwatch_fire_event(struct net_device
*dev
);
3420 void linkwatch_forget_dev(struct net_device
*dev
);
3423 * netif_carrier_ok - test if carrier present
3424 * @dev: network device
3426 * Check if carrier is present on device
3428 static inline bool netif_carrier_ok(const struct net_device
*dev
)
3430 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
3433 unsigned long dev_trans_start(struct net_device
*dev
);
3435 void __netdev_watchdog_up(struct net_device
*dev
);
3437 void netif_carrier_on(struct net_device
*dev
);
3439 void netif_carrier_off(struct net_device
*dev
);
3442 * netif_dormant_on - mark device as dormant.
3443 * @dev: network device
3445 * Mark device as dormant (as per RFC2863).
3447 * The dormant state indicates that the relevant interface is not
3448 * actually in a condition to pass packets (i.e., it is not 'up') but is
3449 * in a "pending" state, waiting for some external event. For "on-
3450 * demand" interfaces, this new state identifies the situation where the
3451 * interface is waiting for events to place it in the up state.
3453 static inline void netif_dormant_on(struct net_device
*dev
)
3455 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3456 linkwatch_fire_event(dev
);
3460 * netif_dormant_off - set device as not dormant.
3461 * @dev: network device
3463 * Device is not in dormant state.
3465 static inline void netif_dormant_off(struct net_device
*dev
)
3467 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3468 linkwatch_fire_event(dev
);
3472 * netif_dormant - test if device is dormant
3473 * @dev: network device
3475 * Check if device is dormant.
3477 static inline bool netif_dormant(const struct net_device
*dev
)
3479 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
3484 * netif_oper_up - test if device is operational
3485 * @dev: network device
3487 * Check if carrier is operational
3489 static inline bool netif_oper_up(const struct net_device
*dev
)
3491 return (dev
->operstate
== IF_OPER_UP
||
3492 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
3496 * netif_device_present - is device available or removed
3497 * @dev: network device
3499 * Check if device has not been removed from system.
3501 static inline bool netif_device_present(struct net_device
*dev
)
3503 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
3506 void netif_device_detach(struct net_device
*dev
);
3508 void netif_device_attach(struct net_device
*dev
);
3511 * Network interface message level settings
3515 NETIF_MSG_DRV
= 0x0001,
3516 NETIF_MSG_PROBE
= 0x0002,
3517 NETIF_MSG_LINK
= 0x0004,
3518 NETIF_MSG_TIMER
= 0x0008,
3519 NETIF_MSG_IFDOWN
= 0x0010,
3520 NETIF_MSG_IFUP
= 0x0020,
3521 NETIF_MSG_RX_ERR
= 0x0040,
3522 NETIF_MSG_TX_ERR
= 0x0080,
3523 NETIF_MSG_TX_QUEUED
= 0x0100,
3524 NETIF_MSG_INTR
= 0x0200,
3525 NETIF_MSG_TX_DONE
= 0x0400,
3526 NETIF_MSG_RX_STATUS
= 0x0800,
3527 NETIF_MSG_PKTDATA
= 0x1000,
3528 NETIF_MSG_HW
= 0x2000,
3529 NETIF_MSG_WOL
= 0x4000,
3532 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3533 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3534 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3535 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3536 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3537 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3538 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3539 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3540 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3541 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3542 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3543 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3544 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3545 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3546 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3548 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
3551 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
3552 return default_msg_enable_bits
;
3553 if (debug_value
== 0) /* no output */
3555 /* set low N bits */
3556 return (1 << debug_value
) - 1;
3559 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
3561 spin_lock(&txq
->_xmit_lock
);
3562 txq
->xmit_lock_owner
= cpu
;
3565 static inline bool __netif_tx_acquire(struct netdev_queue
*txq
)
3567 __acquire(&txq
->_xmit_lock
);
3571 static inline void __netif_tx_release(struct netdev_queue
*txq
)
3573 __release(&txq
->_xmit_lock
);
3576 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
3578 spin_lock_bh(&txq
->_xmit_lock
);
3579 txq
->xmit_lock_owner
= smp_processor_id();
3582 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
3584 bool ok
= spin_trylock(&txq
->_xmit_lock
);
3586 txq
->xmit_lock_owner
= smp_processor_id();
3590 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
3592 txq
->xmit_lock_owner
= -1;
3593 spin_unlock(&txq
->_xmit_lock
);
3596 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
3598 txq
->xmit_lock_owner
= -1;
3599 spin_unlock_bh(&txq
->_xmit_lock
);
3602 static inline void txq_trans_update(struct netdev_queue
*txq
)
3604 if (txq
->xmit_lock_owner
!= -1)
3605 txq
->trans_start
= jiffies
;
3608 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3609 static inline void netif_trans_update(struct net_device
*dev
)
3611 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, 0);
3613 if (txq
->trans_start
!= jiffies
)
3614 txq
->trans_start
= jiffies
;
3618 * netif_tx_lock - grab network device transmit lock
3619 * @dev: network device
3621 * Get network device transmit lock
3623 static inline void netif_tx_lock(struct net_device
*dev
)
3628 spin_lock(&dev
->tx_global_lock
);
3629 cpu
= smp_processor_id();
3630 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3631 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3633 /* We are the only thread of execution doing a
3634 * freeze, but we have to grab the _xmit_lock in
3635 * order to synchronize with threads which are in
3636 * the ->hard_start_xmit() handler and already
3637 * checked the frozen bit.
3639 __netif_tx_lock(txq
, cpu
);
3640 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3641 __netif_tx_unlock(txq
);
3645 static inline void netif_tx_lock_bh(struct net_device
*dev
)
3651 static inline void netif_tx_unlock(struct net_device
*dev
)
3655 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3656 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3658 /* No need to grab the _xmit_lock here. If the
3659 * queue is not stopped for another reason, we
3662 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3663 netif_schedule_queue(txq
);
3665 spin_unlock(&dev
->tx_global_lock
);
3668 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
3670 netif_tx_unlock(dev
);
3674 #define HARD_TX_LOCK(dev, txq, cpu) { \
3675 if ((dev->features & NETIF_F_LLTX) == 0) { \
3676 __netif_tx_lock(txq, cpu); \
3678 __netif_tx_acquire(txq); \
3682 #define HARD_TX_TRYLOCK(dev, txq) \
3683 (((dev->features & NETIF_F_LLTX) == 0) ? \
3684 __netif_tx_trylock(txq) : \
3685 __netif_tx_acquire(txq))
3687 #define HARD_TX_UNLOCK(dev, txq) { \
3688 if ((dev->features & NETIF_F_LLTX) == 0) { \
3689 __netif_tx_unlock(txq); \
3691 __netif_tx_release(txq); \
3695 static inline void netif_tx_disable(struct net_device
*dev
)
3701 cpu
= smp_processor_id();
3702 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3703 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3705 __netif_tx_lock(txq
, cpu
);
3706 netif_tx_stop_queue(txq
);
3707 __netif_tx_unlock(txq
);
3712 static inline void netif_addr_lock(struct net_device
*dev
)
3714 spin_lock(&dev
->addr_list_lock
);
3717 static inline void netif_addr_lock_nested(struct net_device
*dev
)
3719 int subclass
= SINGLE_DEPTH_NESTING
;
3721 if (dev
->netdev_ops
->ndo_get_lock_subclass
)
3722 subclass
= dev
->netdev_ops
->ndo_get_lock_subclass(dev
);
3724 spin_lock_nested(&dev
->addr_list_lock
, subclass
);
3727 static inline void netif_addr_lock_bh(struct net_device
*dev
)
3729 spin_lock_bh(&dev
->addr_list_lock
);
3732 static inline void netif_addr_unlock(struct net_device
*dev
)
3734 spin_unlock(&dev
->addr_list_lock
);
3737 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
3739 spin_unlock_bh(&dev
->addr_list_lock
);
3743 * dev_addrs walker. Should be used only for read access. Call with
3744 * rcu_read_lock held.
3746 #define for_each_dev_addr(dev, ha) \
3747 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3749 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3751 void ether_setup(struct net_device
*dev
);
3753 /* Support for loadable net-drivers */
3754 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
3755 unsigned char name_assign_type
,
3756 void (*setup
)(struct net_device
*),
3757 unsigned int txqs
, unsigned int rxqs
);
3758 int dev_get_valid_name(struct net
*net
, struct net_device
*dev
,
3761 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3762 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3764 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3765 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3768 int register_netdev(struct net_device
*dev
);
3769 void unregister_netdev(struct net_device
*dev
);
3771 /* General hardware address lists handling functions */
3772 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
3773 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3774 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
3775 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3776 int __hw_addr_sync_dev(struct netdev_hw_addr_list
*list
,
3777 struct net_device
*dev
,
3778 int (*sync
)(struct net_device
*, const unsigned char *),
3779 int (*unsync
)(struct net_device
*,
3780 const unsigned char *));
3781 void __hw_addr_unsync_dev(struct netdev_hw_addr_list
*list
,
3782 struct net_device
*dev
,
3783 int (*unsync
)(struct net_device
*,
3784 const unsigned char *));
3785 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
3787 /* Functions used for device addresses handling */
3788 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
3789 unsigned char addr_type
);
3790 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
3791 unsigned char addr_type
);
3792 void dev_addr_flush(struct net_device
*dev
);
3793 int dev_addr_init(struct net_device
*dev
);
3795 /* Functions used for unicast addresses handling */
3796 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
3797 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3798 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
3799 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
3800 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3801 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
3802 void dev_uc_flush(struct net_device
*dev
);
3803 void dev_uc_init(struct net_device
*dev
);
3806 * __dev_uc_sync - Synchonize device's unicast list
3807 * @dev: device to sync
3808 * @sync: function to call if address should be added
3809 * @unsync: function to call if address should be removed
3811 * Add newly added addresses to the interface, and release
3812 * addresses that have been deleted.
3814 static inline int __dev_uc_sync(struct net_device
*dev
,
3815 int (*sync
)(struct net_device
*,
3816 const unsigned char *),
3817 int (*unsync
)(struct net_device
*,
3818 const unsigned char *))
3820 return __hw_addr_sync_dev(&dev
->uc
, dev
, sync
, unsync
);
3824 * __dev_uc_unsync - Remove synchronized addresses from device
3825 * @dev: device to sync
3826 * @unsync: function to call if address should be removed
3828 * Remove all addresses that were added to the device by dev_uc_sync().
3830 static inline void __dev_uc_unsync(struct net_device
*dev
,
3831 int (*unsync
)(struct net_device
*,
3832 const unsigned char *))
3834 __hw_addr_unsync_dev(&dev
->uc
, dev
, unsync
);
3837 /* Functions used for multicast addresses handling */
3838 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
3839 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
3840 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3841 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
3842 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
3843 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
3844 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3845 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
3846 void dev_mc_flush(struct net_device
*dev
);
3847 void dev_mc_init(struct net_device
*dev
);
3850 * __dev_mc_sync - Synchonize device's multicast list
3851 * @dev: device to sync
3852 * @sync: function to call if address should be added
3853 * @unsync: function to call if address should be removed
3855 * Add newly added addresses to the interface, and release
3856 * addresses that have been deleted.
3858 static inline int __dev_mc_sync(struct net_device
*dev
,
3859 int (*sync
)(struct net_device
*,
3860 const unsigned char *),
3861 int (*unsync
)(struct net_device
*,
3862 const unsigned char *))
3864 return __hw_addr_sync_dev(&dev
->mc
, dev
, sync
, unsync
);
3868 * __dev_mc_unsync - Remove synchronized addresses from device
3869 * @dev: device to sync
3870 * @unsync: function to call if address should be removed
3872 * Remove all addresses that were added to the device by dev_mc_sync().
3874 static inline void __dev_mc_unsync(struct net_device
*dev
,
3875 int (*unsync
)(struct net_device
*,
3876 const unsigned char *))
3878 __hw_addr_unsync_dev(&dev
->mc
, dev
, unsync
);
3881 /* Functions used for secondary unicast and multicast support */
3882 void dev_set_rx_mode(struct net_device
*dev
);
3883 void __dev_set_rx_mode(struct net_device
*dev
);
3884 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
3885 int dev_set_allmulti(struct net_device
*dev
, int inc
);
3886 void netdev_state_change(struct net_device
*dev
);
3887 void netdev_notify_peers(struct net_device
*dev
);
3888 void netdev_features_change(struct net_device
*dev
);
3889 /* Load a device via the kmod */
3890 void dev_load(struct net
*net
, const char *name
);
3891 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
3892 struct rtnl_link_stats64
*storage
);
3893 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
3894 const struct net_device_stats
*netdev_stats
);
3896 extern int netdev_max_backlog
;
3897 extern int netdev_tstamp_prequeue
;
3898 extern int weight_p
;
3899 extern int dev_weight_rx_bias
;
3900 extern int dev_weight_tx_bias
;
3901 extern int dev_rx_weight
;
3902 extern int dev_tx_weight
;
3904 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
3905 struct net_device
*netdev_upper_get_next_dev_rcu(struct net_device
*dev
,
3906 struct list_head
**iter
);
3907 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
3908 struct list_head
**iter
);
3910 /* iterate through upper list, must be called under RCU read lock */
3911 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3912 for (iter = &(dev)->adj_list.upper, \
3913 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3915 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3917 int netdev_walk_all_upper_dev_rcu(struct net_device
*dev
,
3918 int (*fn
)(struct net_device
*upper_dev
,
3922 bool netdev_has_upper_dev_all_rcu(struct net_device
*dev
,
3923 struct net_device
*upper_dev
);
3925 bool netdev_has_any_upper_dev(struct net_device
*dev
);
3927 void *netdev_lower_get_next_private(struct net_device
*dev
,
3928 struct list_head
**iter
);
3929 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
3930 struct list_head
**iter
);
3932 #define netdev_for_each_lower_private(dev, priv, iter) \
3933 for (iter = (dev)->adj_list.lower.next, \
3934 priv = netdev_lower_get_next_private(dev, &(iter)); \
3936 priv = netdev_lower_get_next_private(dev, &(iter)))
3938 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3939 for (iter = &(dev)->adj_list.lower, \
3940 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3942 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3944 void *netdev_lower_get_next(struct net_device
*dev
,
3945 struct list_head
**iter
);
3947 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3948 for (iter = (dev)->adj_list.lower.next, \
3949 ldev = netdev_lower_get_next(dev, &(iter)); \
3951 ldev = netdev_lower_get_next(dev, &(iter)))
3953 struct net_device
*netdev_all_lower_get_next(struct net_device
*dev
,
3954 struct list_head
**iter
);
3955 struct net_device
*netdev_all_lower_get_next_rcu(struct net_device
*dev
,
3956 struct list_head
**iter
);
3958 int netdev_walk_all_lower_dev(struct net_device
*dev
,
3959 int (*fn
)(struct net_device
*lower_dev
,
3962 int netdev_walk_all_lower_dev_rcu(struct net_device
*dev
,
3963 int (*fn
)(struct net_device
*lower_dev
,
3967 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
3968 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
3969 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
3970 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
3971 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
,
3972 struct netlink_ext_ack
*extack
);
3973 int netdev_master_upper_dev_link(struct net_device
*dev
,
3974 struct net_device
*upper_dev
,
3975 void *upper_priv
, void *upper_info
,
3976 struct netlink_ext_ack
*extack
);
3977 void netdev_upper_dev_unlink(struct net_device
*dev
,
3978 struct net_device
*upper_dev
);
3979 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
3980 void *netdev_lower_dev_get_private(struct net_device
*dev
,
3981 struct net_device
*lower_dev
);
3982 void netdev_lower_state_changed(struct net_device
*lower_dev
,
3983 void *lower_state_info
);
3985 /* RSS keys are 40 or 52 bytes long */
3986 #define NETDEV_RSS_KEY_LEN 52
3987 extern u8 netdev_rss_key
[NETDEV_RSS_KEY_LEN
] __read_mostly
;
3988 void netdev_rss_key_fill(void *buffer
, size_t len
);
3990 int dev_get_nest_level(struct net_device
*dev
);
3991 int skb_checksum_help(struct sk_buff
*skb
);
3992 int skb_crc32c_csum_help(struct sk_buff
*skb
);
3993 int skb_csum_hwoffload_help(struct sk_buff
*skb
,
3994 const netdev_features_t features
);
3996 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
3997 netdev_features_t features
, bool tx_path
);
3998 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
3999 netdev_features_t features
);
4001 struct netdev_bonding_info
{
4006 struct netdev_notifier_bonding_info
{
4007 struct netdev_notifier_info info
; /* must be first */
4008 struct netdev_bonding_info bonding_info
;
4011 void netdev_bonding_info_change(struct net_device
*dev
,
4012 struct netdev_bonding_info
*bonding_info
);
4015 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
4017 return __skb_gso_segment(skb
, features
, true);
4019 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
4021 static inline bool can_checksum_protocol(netdev_features_t features
,
4024 if (protocol
== htons(ETH_P_FCOE
))
4025 return !!(features
& NETIF_F_FCOE_CRC
);
4027 /* Assume this is an IP checksum (not SCTP CRC) */
4029 if (features
& NETIF_F_HW_CSUM
) {
4030 /* Can checksum everything */
4035 case htons(ETH_P_IP
):
4036 return !!(features
& NETIF_F_IP_CSUM
);
4037 case htons(ETH_P_IPV6
):
4038 return !!(features
& NETIF_F_IPV6_CSUM
);
4045 void netdev_rx_csum_fault(struct net_device
*dev
);
4047 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
4051 /* rx skb timestamps */
4052 void net_enable_timestamp(void);
4053 void net_disable_timestamp(void);
4055 #ifdef CONFIG_PROC_FS
4056 int __init
dev_proc_init(void);
4058 #define dev_proc_init() 0
4061 static inline netdev_tx_t
__netdev_start_xmit(const struct net_device_ops
*ops
,
4062 struct sk_buff
*skb
, struct net_device
*dev
,
4065 skb
->xmit_more
= more
? 1 : 0;
4066 return ops
->ndo_start_xmit(skb
, dev
);
4069 static inline netdev_tx_t
netdev_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
4070 struct netdev_queue
*txq
, bool more
)
4072 const struct net_device_ops
*ops
= dev
->netdev_ops
;
4075 rc
= __netdev_start_xmit(ops
, skb
, dev
, more
);
4076 if (rc
== NETDEV_TX_OK
)
4077 txq_trans_update(txq
);
4082 int netdev_class_create_file_ns(const struct class_attribute
*class_attr
,
4084 void netdev_class_remove_file_ns(const struct class_attribute
*class_attr
,
4087 static inline int netdev_class_create_file(const struct class_attribute
*class_attr
)
4089 return netdev_class_create_file_ns(class_attr
, NULL
);
4092 static inline void netdev_class_remove_file(const struct class_attribute
*class_attr
)
4094 netdev_class_remove_file_ns(class_attr
, NULL
);
4097 extern const struct kobj_ns_type_operations net_ns_type_operations
;
4099 const char *netdev_drivername(const struct net_device
*dev
);
4101 void linkwatch_run_queue(void);
4103 static inline netdev_features_t
netdev_intersect_features(netdev_features_t f1
,
4104 netdev_features_t f2
)
4106 if ((f1
^ f2
) & NETIF_F_HW_CSUM
) {
4107 if (f1
& NETIF_F_HW_CSUM
)
4108 f1
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4110 f2
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4116 static inline netdev_features_t
netdev_get_wanted_features(
4117 struct net_device
*dev
)
4119 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
4121 netdev_features_t
netdev_increment_features(netdev_features_t all
,
4122 netdev_features_t one
, netdev_features_t mask
);
4124 /* Allow TSO being used on stacked device :
4125 * Performing the GSO segmentation before last device
4126 * is a performance improvement.
4128 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
4129 netdev_features_t mask
)
4131 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
4134 int __netdev_update_features(struct net_device
*dev
);
4135 void netdev_update_features(struct net_device
*dev
);
4136 void netdev_change_features(struct net_device
*dev
);
4138 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
4139 struct net_device
*dev
);
4141 netdev_features_t
passthru_features_check(struct sk_buff
*skb
,
4142 struct net_device
*dev
,
4143 netdev_features_t features
);
4144 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
4146 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
4148 netdev_features_t feature
= (netdev_features_t
)gso_type
<< NETIF_F_GSO_SHIFT
;
4150 /* check flags correspondence */
4151 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
4152 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
4153 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
4154 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID
!= (NETIF_F_TSO_MANGLEID
>> NETIF_F_GSO_SHIFT
));
4155 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
4156 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
4157 BUILD_BUG_ON(SKB_GSO_GRE
!= (NETIF_F_GSO_GRE
>> NETIF_F_GSO_SHIFT
));
4158 BUILD_BUG_ON(SKB_GSO_GRE_CSUM
!= (NETIF_F_GSO_GRE_CSUM
>> NETIF_F_GSO_SHIFT
));
4159 BUILD_BUG_ON(SKB_GSO_IPXIP4
!= (NETIF_F_GSO_IPXIP4
>> NETIF_F_GSO_SHIFT
));
4160 BUILD_BUG_ON(SKB_GSO_IPXIP6
!= (NETIF_F_GSO_IPXIP6
>> NETIF_F_GSO_SHIFT
));
4161 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL
!= (NETIF_F_GSO_UDP_TUNNEL
>> NETIF_F_GSO_SHIFT
));
4162 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM
!= (NETIF_F_GSO_UDP_TUNNEL_CSUM
>> NETIF_F_GSO_SHIFT
));
4163 BUILD_BUG_ON(SKB_GSO_PARTIAL
!= (NETIF_F_GSO_PARTIAL
>> NETIF_F_GSO_SHIFT
));
4164 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM
!= (NETIF_F_GSO_TUNNEL_REMCSUM
>> NETIF_F_GSO_SHIFT
));
4165 BUILD_BUG_ON(SKB_GSO_SCTP
!= (NETIF_F_GSO_SCTP
>> NETIF_F_GSO_SHIFT
));
4166 BUILD_BUG_ON(SKB_GSO_ESP
!= (NETIF_F_GSO_ESP
>> NETIF_F_GSO_SHIFT
));
4167 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_GSO_UDP
>> NETIF_F_GSO_SHIFT
));
4169 return (features
& feature
) == feature
;
4172 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
4174 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
4175 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
4178 static inline bool netif_needs_gso(struct sk_buff
*skb
,
4179 netdev_features_t features
)
4181 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
4182 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
4183 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
4186 static inline void netif_set_gso_max_size(struct net_device
*dev
,
4189 dev
->gso_max_size
= size
;
4192 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
4193 int pulled_hlen
, u16 mac_offset
,
4196 skb
->protocol
= protocol
;
4197 skb
->encapsulation
= 1;
4198 skb_push(skb
, pulled_hlen
);
4199 skb_reset_transport_header(skb
);
4200 skb
->mac_header
= mac_offset
;
4201 skb
->network_header
= skb
->mac_header
+ mac_len
;
4202 skb
->mac_len
= mac_len
;
4205 static inline bool netif_is_macsec(const struct net_device
*dev
)
4207 return dev
->priv_flags
& IFF_MACSEC
;
4210 static inline bool netif_is_macvlan(const struct net_device
*dev
)
4212 return dev
->priv_flags
& IFF_MACVLAN
;
4215 static inline bool netif_is_macvlan_port(const struct net_device
*dev
)
4217 return dev
->priv_flags
& IFF_MACVLAN_PORT
;
4220 static inline bool netif_is_ipvlan(const struct net_device
*dev
)
4222 return dev
->priv_flags
& IFF_IPVLAN_SLAVE
;
4225 static inline bool netif_is_ipvlan_port(const struct net_device
*dev
)
4227 return dev
->priv_flags
& IFF_IPVLAN_MASTER
;
4230 static inline bool netif_is_bond_master(const struct net_device
*dev
)
4232 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
4235 static inline bool netif_is_bond_slave(const struct net_device
*dev
)
4237 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
4240 static inline bool netif_supports_nofcs(struct net_device
*dev
)
4242 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
4245 static inline bool netif_is_l3_master(const struct net_device
*dev
)
4247 return dev
->priv_flags
& IFF_L3MDEV_MASTER
;
4250 static inline bool netif_is_l3_slave(const struct net_device
*dev
)
4252 return dev
->priv_flags
& IFF_L3MDEV_SLAVE
;
4255 static inline bool netif_is_bridge_master(const struct net_device
*dev
)
4257 return dev
->priv_flags
& IFF_EBRIDGE
;
4260 static inline bool netif_is_bridge_port(const struct net_device
*dev
)
4262 return dev
->priv_flags
& IFF_BRIDGE_PORT
;
4265 static inline bool netif_is_ovs_master(const struct net_device
*dev
)
4267 return dev
->priv_flags
& IFF_OPENVSWITCH
;
4270 static inline bool netif_is_ovs_port(const struct net_device
*dev
)
4272 return dev
->priv_flags
& IFF_OVS_DATAPATH
;
4275 static inline bool netif_is_team_master(const struct net_device
*dev
)
4277 return dev
->priv_flags
& IFF_TEAM
;
4280 static inline bool netif_is_team_port(const struct net_device
*dev
)
4282 return dev
->priv_flags
& IFF_TEAM_PORT
;
4285 static inline bool netif_is_lag_master(const struct net_device
*dev
)
4287 return netif_is_bond_master(dev
) || netif_is_team_master(dev
);
4290 static inline bool netif_is_lag_port(const struct net_device
*dev
)
4292 return netif_is_bond_slave(dev
) || netif_is_team_port(dev
);
4295 static inline bool netif_is_rxfh_configured(const struct net_device
*dev
)
4297 return dev
->priv_flags
& IFF_RXFH_CONFIGURED
;
4300 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4301 static inline void netif_keep_dst(struct net_device
*dev
)
4303 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
);
4306 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4307 static inline bool netif_reduces_vlan_mtu(struct net_device
*dev
)
4309 /* TODO: reserve and use an additional IFF bit, if we get more users */
4310 return dev
->priv_flags
& IFF_MACSEC
;
4313 extern struct pernet_operations __net_initdata loopback_net_ops
;
4315 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4317 /* netdev_printk helpers, similar to dev_printk */
4319 static inline const char *netdev_name(const struct net_device
*dev
)
4321 if (!dev
->name
[0] || strchr(dev
->name
, '%'))
4322 return "(unnamed net_device)";
4326 static inline bool netdev_unregistering(const struct net_device
*dev
)
4328 return dev
->reg_state
== NETREG_UNREGISTERING
;
4331 static inline const char *netdev_reg_state(const struct net_device
*dev
)
4333 switch (dev
->reg_state
) {
4334 case NETREG_UNINITIALIZED
: return " (uninitialized)";
4335 case NETREG_REGISTERED
: return "";
4336 case NETREG_UNREGISTERING
: return " (unregistering)";
4337 case NETREG_UNREGISTERED
: return " (unregistered)";
4338 case NETREG_RELEASED
: return " (released)";
4339 case NETREG_DUMMY
: return " (dummy)";
4342 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev
->name
, dev
->reg_state
);
4343 return " (unknown)";
4347 void netdev_printk(const char *level
, const struct net_device
*dev
,
4348 const char *format
, ...);
4350 void netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
4352 void netdev_alert(const struct net_device
*dev
, const char *format
, ...);
4354 void netdev_crit(const struct net_device
*dev
, const char *format
, ...);
4356 void netdev_err(const struct net_device
*dev
, const char *format
, ...);
4358 void netdev_warn(const struct net_device
*dev
, const char *format
, ...);
4360 void netdev_notice(const struct net_device
*dev
, const char *format
, ...);
4362 void netdev_info(const struct net_device
*dev
, const char *format
, ...);
4364 #define netdev_level_once(level, dev, fmt, ...) \
4366 static bool __print_once __read_mostly; \
4368 if (!__print_once) { \
4369 __print_once = true; \
4370 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4374 #define netdev_emerg_once(dev, fmt, ...) \
4375 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4376 #define netdev_alert_once(dev, fmt, ...) \
4377 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4378 #define netdev_crit_once(dev, fmt, ...) \
4379 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4380 #define netdev_err_once(dev, fmt, ...) \
4381 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4382 #define netdev_warn_once(dev, fmt, ...) \
4383 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4384 #define netdev_notice_once(dev, fmt, ...) \
4385 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4386 #define netdev_info_once(dev, fmt, ...) \
4387 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4389 #define MODULE_ALIAS_NETDEV(device) \
4390 MODULE_ALIAS("netdev-" device)
4392 #if defined(CONFIG_DYNAMIC_DEBUG)
4393 #define netdev_dbg(__dev, format, args...) \
4395 dynamic_netdev_dbg(__dev, format, ##args); \
4397 #elif defined(DEBUG)
4398 #define netdev_dbg(__dev, format, args...) \
4399 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4401 #define netdev_dbg(__dev, format, args...) \
4404 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4408 #if defined(VERBOSE_DEBUG)
4409 #define netdev_vdbg netdev_dbg
4412 #define netdev_vdbg(dev, format, args...) \
4415 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4421 * netdev_WARN() acts like dev_printk(), but with the key difference
4422 * of using a WARN/WARN_ON to get the message out, including the
4423 * file/line information and a backtrace.
4425 #define netdev_WARN(dev, format, args...) \
4426 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4427 netdev_reg_state(dev), ##args)
4429 #define netdev_WARN_ONCE(dev, format, args...) \
4430 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4431 netdev_reg_state(dev), ##args)
4433 /* netif printk helpers, similar to netdev_printk */
4435 #define netif_printk(priv, type, level, dev, fmt, args...) \
4437 if (netif_msg_##type(priv)) \
4438 netdev_printk(level, (dev), fmt, ##args); \
4441 #define netif_level(level, priv, type, dev, fmt, args...) \
4443 if (netif_msg_##type(priv)) \
4444 netdev_##level(dev, fmt, ##args); \
4447 #define netif_emerg(priv, type, dev, fmt, args...) \
4448 netif_level(emerg, priv, type, dev, fmt, ##args)
4449 #define netif_alert(priv, type, dev, fmt, args...) \
4450 netif_level(alert, priv, type, dev, fmt, ##args)
4451 #define netif_crit(priv, type, dev, fmt, args...) \
4452 netif_level(crit, priv, type, dev, fmt, ##args)
4453 #define netif_err(priv, type, dev, fmt, args...) \
4454 netif_level(err, priv, type, dev, fmt, ##args)
4455 #define netif_warn(priv, type, dev, fmt, args...) \
4456 netif_level(warn, priv, type, dev, fmt, ##args)
4457 #define netif_notice(priv, type, dev, fmt, args...) \
4458 netif_level(notice, priv, type, dev, fmt, ##args)
4459 #define netif_info(priv, type, dev, fmt, args...) \
4460 netif_level(info, priv, type, dev, fmt, ##args)
4462 #if defined(CONFIG_DYNAMIC_DEBUG)
4463 #define netif_dbg(priv, type, netdev, format, args...) \
4465 if (netif_msg_##type(priv)) \
4466 dynamic_netdev_dbg(netdev, format, ##args); \
4468 #elif defined(DEBUG)
4469 #define netif_dbg(priv, type, dev, format, args...) \
4470 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4472 #define netif_dbg(priv, type, dev, format, args...) \
4475 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4480 /* if @cond then downgrade to debug, else print at @level */
4481 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4484 netif_dbg(priv, type, netdev, fmt, ##args); \
4486 netif_ ## level(priv, type, netdev, fmt, ##args); \
4489 #if defined(VERBOSE_DEBUG)
4490 #define netif_vdbg netif_dbg
4492 #define netif_vdbg(priv, type, dev, format, args...) \
4495 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4501 * The list of packet types we will receive (as opposed to discard)
4502 * and the routines to invoke.
4504 * Why 16. Because with 16 the only overlap we get on a hash of the
4505 * low nibble of the protocol value is RARP/SNAP/X.25.
4519 #define PTYPE_HASH_SIZE (16)
4520 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4522 #endif /* _LINUX_NETDEVICE_H */