1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
7 * Definitions for the Interfaces handler.
9 * Version: @(#)dev.h 1.0.10 08/12/93
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 * Corey Minyard <wf-rch!minyard@relay.EU.net>
14 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
15 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
16 * Bjorn Ekwall. <bj0rn@blox.se>
17 * Pekka Riikonen <priikone@poseidon.pspt.fi>
19 * Moved to /usr/include/linux for NET3
21 #ifndef _LINUX_NETDEVICE_H
22 #define _LINUX_NETDEVICE_H
24 #include <linux/timer.h>
25 #include <linux/bug.h>
26 #include <linux/delay.h>
27 #include <linux/atomic.h>
28 #include <linux/prefetch.h>
29 #include <asm/cache.h>
30 #include <asm/byteorder.h>
32 #include <linux/percpu.h>
33 #include <linux/rculist.h>
34 #include <linux/workqueue.h>
35 #include <linux/dynamic_queue_limits.h>
37 #include <linux/ethtool.h>
38 #include <net/net_namespace.h>
40 #include <net/dcbnl.h>
42 #include <net/netprio_cgroup.h>
45 #include <linux/netdev_features.h>
46 #include <linux/neighbour.h>
47 #include <uapi/linux/netdevice.h>
48 #include <uapi/linux/if_bonding.h>
49 #include <uapi/linux/pkt_cls.h>
50 #include <linux/hashtable.h>
60 /* 802.15.4 specific */
63 /* UDP Tunnel offloads */
64 struct udp_tunnel_info
;
68 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
69 const struct ethtool_ops
*ops
);
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
76 * Transmit return codes: transmit return codes originate from three different
79 * - qdisc return codes
80 * - driver transmit return codes
83 * Drivers are allowed to return any one of those in their hard_start_xmit()
84 * function. Real network devices commonly used with qdiscs should only return
85 * the driver transmit return codes though - when qdiscs are used, the actual
86 * transmission happens asynchronously, so the value is not propagated to
87 * higher layers. Virtual network devices transmit synchronously; in this case
88 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
89 * others are propagated to higher layers.
92 /* qdisc ->enqueue() return codes. */
93 #define NET_XMIT_SUCCESS 0x00
94 #define NET_XMIT_DROP 0x01 /* skb dropped */
95 #define NET_XMIT_CN 0x02 /* congestion notification */
96 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
98 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
99 * indicates that the device will soon be dropping packets, or already drops
100 * some packets of the same priority; prompting us to send less aggressively. */
101 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
102 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
104 /* Driver transmit return codes */
105 #define NETDEV_TX_MASK 0xf0
108 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
109 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
110 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
112 typedef enum netdev_tx netdev_tx_t
;
115 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
116 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
118 static inline bool dev_xmit_complete(int rc
)
121 * Positive cases with an skb consumed by a driver:
122 * - successful transmission (rc == NETDEV_TX_OK)
123 * - error while transmitting (rc < 0)
124 * - error while queueing to a different device (rc & NET_XMIT_MASK)
126 if (likely(rc
< NET_XMIT_MASK
))
133 * Compute the worst-case header length according to the protocols
137 #if defined(CONFIG_HYPERV_NET)
138 # define LL_MAX_HEADER 128
139 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
140 # if defined(CONFIG_MAC80211_MESH)
141 # define LL_MAX_HEADER 128
143 # define LL_MAX_HEADER 96
146 # define LL_MAX_HEADER 32
149 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
150 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
151 #define MAX_HEADER LL_MAX_HEADER
153 #define MAX_HEADER (LL_MAX_HEADER + 48)
157 * Old network device statistics. Fields are native words
158 * (unsigned long) so they can be read and written atomically.
161 struct net_device_stats
{
162 unsigned long rx_packets
;
163 unsigned long tx_packets
;
164 unsigned long rx_bytes
;
165 unsigned long tx_bytes
;
166 unsigned long rx_errors
;
167 unsigned long tx_errors
;
168 unsigned long rx_dropped
;
169 unsigned long tx_dropped
;
170 unsigned long multicast
;
171 unsigned long collisions
;
172 unsigned long rx_length_errors
;
173 unsigned long rx_over_errors
;
174 unsigned long rx_crc_errors
;
175 unsigned long rx_frame_errors
;
176 unsigned long rx_fifo_errors
;
177 unsigned long rx_missed_errors
;
178 unsigned long tx_aborted_errors
;
179 unsigned long tx_carrier_errors
;
180 unsigned long tx_fifo_errors
;
181 unsigned long tx_heartbeat_errors
;
182 unsigned long tx_window_errors
;
183 unsigned long rx_compressed
;
184 unsigned long tx_compressed
;
188 #include <linux/cache.h>
189 #include <linux/skbuff.h>
192 #include <linux/static_key.h>
193 extern struct static_key_false rps_needed
;
194 extern struct static_key_false rfs_needed
;
201 struct netdev_hw_addr
{
202 struct list_head list
;
203 unsigned char addr
[MAX_ADDR_LEN
];
205 #define NETDEV_HW_ADDR_T_LAN 1
206 #define NETDEV_HW_ADDR_T_SAN 2
207 #define NETDEV_HW_ADDR_T_SLAVE 3
208 #define NETDEV_HW_ADDR_T_UNICAST 4
209 #define NETDEV_HW_ADDR_T_MULTICAST 5
214 struct rcu_head rcu_head
;
217 struct netdev_hw_addr_list
{
218 struct list_head list
;
222 #define netdev_hw_addr_list_count(l) ((l)->count)
223 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
224 #define netdev_hw_addr_list_for_each(ha, l) \
225 list_for_each_entry(ha, &(l)->list, list)
227 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
228 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
229 #define netdev_for_each_uc_addr(ha, dev) \
230 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
232 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
233 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
234 #define netdev_for_each_mc_addr(ha, dev) \
235 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
241 /* cached hardware header; allow for machine alignment needs. */
242 #define HH_DATA_MOD 16
243 #define HH_DATA_OFF(__len) \
244 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
245 #define HH_DATA_ALIGN(__len) \
246 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
247 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
250 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
252 * dev->hard_header_len ? (dev->hard_header_len +
253 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
255 * We could use other alignment values, but we must maintain the
256 * relationship HH alignment <= LL alignment.
258 #define LL_RESERVED_SPACE(dev) \
259 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
260 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
265 unsigned short type
, const void *daddr
,
266 const void *saddr
, unsigned int len
);
267 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
268 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
269 void (*cache_update
)(struct hh_cache
*hh
,
270 const struct net_device
*dev
,
271 const unsigned char *haddr
);
272 bool (*validate
)(const char *ll_header
, unsigned int len
);
273 __be16 (*parse_protocol
)(const struct sk_buff
*skb
);
276 /* These flag bits are private to the generic network queueing
277 * layer; they may not be explicitly referenced by any other
281 enum netdev_state_t
{
283 __LINK_STATE_PRESENT
,
284 __LINK_STATE_NOCARRIER
,
285 __LINK_STATE_LINKWATCH_PENDING
,
286 __LINK_STATE_DORMANT
,
291 * This structure holds boot-time configured netdevice settings. They
292 * are then used in the device probing.
294 struct netdev_boot_setup
{
298 #define NETDEV_BOOT_SETUP_MAX 8
300 int __init
netdev_boot_setup(char *str
);
303 struct list_head list
;
308 * size of gro hash buckets, must less than bit number of
309 * napi_struct::gro_bitmask
311 #define GRO_HASH_BUCKETS 8
314 * Structure for NAPI scheduling similar to tasklet but with weighting
317 /* The poll_list must only be managed by the entity which
318 * changes the state of the NAPI_STATE_SCHED bit. This means
319 * whoever atomically sets that bit can add this napi_struct
320 * to the per-CPU poll_list, and whoever clears that bit
321 * can remove from the list right before clearing the bit.
323 struct list_head poll_list
;
327 unsigned long gro_bitmask
;
328 int (*poll
)(struct napi_struct
*, int);
329 #ifdef CONFIG_NETPOLL
332 struct net_device
*dev
;
333 struct gro_list gro_hash
[GRO_HASH_BUCKETS
];
335 struct list_head rx_list
; /* Pending GRO_NORMAL skbs */
336 int rx_count
; /* length of rx_list */
337 struct hrtimer timer
;
338 struct list_head dev_list
;
339 struct hlist_node napi_hash_node
;
340 unsigned int napi_id
;
344 NAPI_STATE_SCHED
, /* Poll is scheduled */
345 NAPI_STATE_MISSED
, /* reschedule a napi */
346 NAPI_STATE_DISABLE
, /* Disable pending */
347 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
348 NAPI_STATE_HASHED
, /* In NAPI hash (busy polling possible) */
349 NAPI_STATE_NO_BUSY_POLL
,/* Do not add in napi_hash, no busy polling */
350 NAPI_STATE_IN_BUSY_POLL
,/* sk_busy_loop() owns this NAPI */
354 NAPIF_STATE_SCHED
= BIT(NAPI_STATE_SCHED
),
355 NAPIF_STATE_MISSED
= BIT(NAPI_STATE_MISSED
),
356 NAPIF_STATE_DISABLE
= BIT(NAPI_STATE_DISABLE
),
357 NAPIF_STATE_NPSVC
= BIT(NAPI_STATE_NPSVC
),
358 NAPIF_STATE_HASHED
= BIT(NAPI_STATE_HASHED
),
359 NAPIF_STATE_NO_BUSY_POLL
= BIT(NAPI_STATE_NO_BUSY_POLL
),
360 NAPIF_STATE_IN_BUSY_POLL
= BIT(NAPI_STATE_IN_BUSY_POLL
),
371 typedef enum gro_result gro_result_t
;
374 * enum rx_handler_result - Possible return values for rx_handlers.
375 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
377 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
378 * case skb->dev was changed by rx_handler.
379 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
380 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
382 * rx_handlers are functions called from inside __netif_receive_skb(), to do
383 * special processing of the skb, prior to delivery to protocol handlers.
385 * Currently, a net_device can only have a single rx_handler registered. Trying
386 * to register a second rx_handler will return -EBUSY.
388 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
389 * To unregister a rx_handler on a net_device, use
390 * netdev_rx_handler_unregister().
392 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
395 * If the rx_handler consumed the skb in some way, it should return
396 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
397 * the skb to be delivered in some other way.
399 * If the rx_handler changed skb->dev, to divert the skb to another
400 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
401 * new device will be called if it exists.
403 * If the rx_handler decides the skb should be ignored, it should return
404 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
405 * are registered on exact device (ptype->dev == skb->dev).
407 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
408 * delivered, it should return RX_HANDLER_PASS.
410 * A device without a registered rx_handler will behave as if rx_handler
411 * returned RX_HANDLER_PASS.
414 enum rx_handler_result
{
420 typedef enum rx_handler_result rx_handler_result_t
;
421 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
423 void __napi_schedule(struct napi_struct
*n
);
424 void __napi_schedule_irqoff(struct napi_struct
*n
);
426 static inline bool napi_disable_pending(struct napi_struct
*n
)
428 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
431 bool napi_schedule_prep(struct napi_struct
*n
);
434 * napi_schedule - schedule NAPI poll
437 * Schedule NAPI poll routine to be called if it is not already
440 static inline void napi_schedule(struct napi_struct
*n
)
442 if (napi_schedule_prep(n
))
447 * napi_schedule_irqoff - schedule NAPI poll
450 * Variant of napi_schedule(), assuming hard irqs are masked.
452 static inline void napi_schedule_irqoff(struct napi_struct
*n
)
454 if (napi_schedule_prep(n
))
455 __napi_schedule_irqoff(n
);
458 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
459 static inline bool napi_reschedule(struct napi_struct
*napi
)
461 if (napi_schedule_prep(napi
)) {
462 __napi_schedule(napi
);
468 bool napi_complete_done(struct napi_struct
*n
, int work_done
);
470 * napi_complete - NAPI processing complete
473 * Mark NAPI processing as complete.
474 * Consider using napi_complete_done() instead.
475 * Return false if device should avoid rearming interrupts.
477 static inline bool napi_complete(struct napi_struct
*n
)
479 return napi_complete_done(n
, 0);
483 * napi_hash_del - remove a NAPI from global table
484 * @napi: NAPI context
486 * Warning: caller must observe RCU grace period
487 * before freeing memory containing @napi, if
488 * this function returns true.
489 * Note: core networking stack automatically calls it
490 * from netif_napi_del().
491 * Drivers might want to call this helper to combine all
492 * the needed RCU grace periods into a single one.
494 bool napi_hash_del(struct napi_struct
*napi
);
497 * napi_disable - prevent NAPI from scheduling
500 * Stop NAPI from being scheduled on this context.
501 * Waits till any outstanding processing completes.
503 void napi_disable(struct napi_struct
*n
);
506 * napi_enable - enable NAPI scheduling
509 * Resume NAPI from being scheduled on this context.
510 * Must be paired with napi_disable.
512 static inline void napi_enable(struct napi_struct
*n
)
514 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
515 smp_mb__before_atomic();
516 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
517 clear_bit(NAPI_STATE_NPSVC
, &n
->state
);
521 * napi_synchronize - wait until NAPI is not running
524 * Wait until NAPI is done being scheduled on this context.
525 * Waits till any outstanding processing completes but
526 * does not disable future activations.
528 static inline void napi_synchronize(const struct napi_struct
*n
)
530 if (IS_ENABLED(CONFIG_SMP
))
531 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
538 * napi_if_scheduled_mark_missed - if napi is running, set the
542 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
545 static inline bool napi_if_scheduled_mark_missed(struct napi_struct
*n
)
547 unsigned long val
, new;
550 val
= READ_ONCE(n
->state
);
551 if (val
& NAPIF_STATE_DISABLE
)
554 if (!(val
& NAPIF_STATE_SCHED
))
557 new = val
| NAPIF_STATE_MISSED
;
558 } while (cmpxchg(&n
->state
, val
, new) != val
);
563 enum netdev_queue_state_t
{
564 __QUEUE_STATE_DRV_XOFF
,
565 __QUEUE_STATE_STACK_XOFF
,
566 __QUEUE_STATE_FROZEN
,
569 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
570 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
571 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
573 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
574 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
576 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
580 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
581 * netif_tx_* functions below are used to manipulate this flag. The
582 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
583 * queue independently. The netif_xmit_*stopped functions below are called
584 * to check if the queue has been stopped by the driver or stack (either
585 * of the XOFF bits are set in the state). Drivers should not need to call
586 * netif_xmit*stopped functions, they should only be using netif_tx_*.
589 struct netdev_queue
{
593 struct net_device
*dev
;
594 struct Qdisc __rcu
*qdisc
;
595 struct Qdisc
*qdisc_sleeping
;
599 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
602 unsigned long tx_maxrate
;
604 * Number of TX timeouts for this queue
605 * (/sys/class/net/DEV/Q/trans_timeout)
607 unsigned long trans_timeout
;
609 /* Subordinate device that the queue has been assigned to */
610 struct net_device
*sb_dev
;
611 #ifdef CONFIG_XDP_SOCKETS
612 struct xdp_umem
*umem
;
617 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
620 * Time (in jiffies) of last Tx
622 unsigned long trans_start
;
629 } ____cacheline_aligned_in_smp
;
631 extern int sysctl_fb_tunnels_only_for_init_net
;
632 extern int sysctl_devconf_inherit_init_net
;
634 static inline bool net_has_fallback_tunnels(const struct net
*net
)
636 return net
== &init_net
||
637 !IS_ENABLED(CONFIG_SYSCTL
) ||
638 !sysctl_fb_tunnels_only_for_init_net
;
641 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
643 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
650 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
652 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
659 * This structure holds an RPS map which can be of variable length. The
660 * map is an array of CPUs.
667 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
670 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
671 * tail pointer for that CPU's input queue at the time of last enqueue, and
672 * a hardware filter index.
674 struct rps_dev_flow
{
677 unsigned int last_qtail
;
679 #define RPS_NO_FILTER 0xffff
682 * The rps_dev_flow_table structure contains a table of flow mappings.
684 struct rps_dev_flow_table
{
687 struct rps_dev_flow flows
[0];
689 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
690 ((_num) * sizeof(struct rps_dev_flow)))
693 * The rps_sock_flow_table contains mappings of flows to the last CPU
694 * on which they were processed by the application (set in recvmsg).
695 * Each entry is a 32bit value. Upper part is the high-order bits
696 * of flow hash, lower part is CPU number.
697 * rps_cpu_mask is used to partition the space, depending on number of
698 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
699 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
700 * meaning we use 32-6=26 bits for the hash.
702 struct rps_sock_flow_table
{
705 u32 ents
[0] ____cacheline_aligned_in_smp
;
707 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
709 #define RPS_NO_CPU 0xffff
711 extern u32 rps_cpu_mask
;
712 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
714 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
718 unsigned int index
= hash
& table
->mask
;
719 u32 val
= hash
& ~rps_cpu_mask
;
721 /* We only give a hint, preemption can change CPU under us */
722 val
|= raw_smp_processor_id();
724 if (table
->ents
[index
] != val
)
725 table
->ents
[index
] = val
;
729 #ifdef CONFIG_RFS_ACCEL
730 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
733 #endif /* CONFIG_RPS */
735 /* This structure contains an instance of an RX queue. */
736 struct netdev_rx_queue
{
738 struct rps_map __rcu
*rps_map
;
739 struct rps_dev_flow_table __rcu
*rps_flow_table
;
742 struct net_device
*dev
;
743 struct xdp_rxq_info xdp_rxq
;
744 #ifdef CONFIG_XDP_SOCKETS
745 struct xdp_umem
*umem
;
747 } ____cacheline_aligned_in_smp
;
750 * RX queue sysfs structures and functions.
752 struct rx_queue_attribute
{
753 struct attribute attr
;
754 ssize_t (*show
)(struct netdev_rx_queue
*queue
, char *buf
);
755 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
756 const char *buf
, size_t len
);
761 * This structure holds an XPS map which can be of variable length. The
762 * map is an array of queues.
766 unsigned int alloc_len
;
770 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
771 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
772 - sizeof(struct xps_map)) / sizeof(u16))
775 * This structure holds all XPS maps for device. Maps are indexed by CPU.
777 struct xps_dev_maps
{
779 struct xps_map __rcu
*attr_map
[0]; /* Either CPUs map or RXQs map */
782 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
783 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
785 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
786 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
788 #endif /* CONFIG_XPS */
790 #define TC_MAX_QUEUE 16
791 #define TC_BITMASK 15
792 /* HW offloaded queuing disciplines txq count and offset maps */
793 struct netdev_tc_txq
{
798 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
800 * This structure is to hold information about the device
801 * configured to run FCoE protocol stack.
803 struct netdev_fcoe_hbainfo
{
804 char manufacturer
[64];
805 char serial_number
[64];
806 char hardware_version
[64];
807 char driver_version
[64];
808 char optionrom_version
[64];
809 char firmware_version
[64];
811 char model_description
[256];
815 #define MAX_PHYS_ITEM_ID_LEN 32
817 /* This structure holds a unique identifier to identify some
818 * physical item (port for example) used by a netdevice.
820 struct netdev_phys_item_id
{
821 unsigned char id
[MAX_PHYS_ITEM_ID_LEN
];
822 unsigned char id_len
;
825 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id
*a
,
826 struct netdev_phys_item_id
*b
)
828 return a
->id_len
== b
->id_len
&&
829 memcmp(a
->id
, b
->id
, a
->id_len
) == 0;
832 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
834 struct net_device
*sb_dev
);
837 TC_SETUP_QDISC_MQPRIO
,
840 TC_SETUP_CLSMATCHALL
,
850 TC_SETUP_QDISC_TAPRIO
,
854 /* These structures hold the attributes of bpf state that are being passed
855 * to the netdevice through the bpf op.
857 enum bpf_netdev_command
{
858 /* Set or clear a bpf program used in the earliest stages of packet
859 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
860 * is responsible for calling bpf_prog_put on any old progs that are
861 * stored. In case of error, the callee need not release the new prog
862 * reference, but on success it takes ownership and must bpf_prog_put
863 * when it is no longer used.
869 /* BPF program for offload callbacks, invoked at program load time. */
870 BPF_OFFLOAD_MAP_ALLOC
,
871 BPF_OFFLOAD_MAP_FREE
,
875 struct bpf_prog_offload_ops
;
876 struct netlink_ext_ack
;
880 enum bpf_netdev_command command
;
885 struct bpf_prog
*prog
;
886 struct netlink_ext_ack
*extack
;
888 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
891 /* flags with which program was installed */
894 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
896 struct bpf_offloaded_map
*offmap
;
898 /* XDP_SETUP_XSK_UMEM */
900 struct xdp_umem
*umem
;
906 /* Flags for ndo_xsk_wakeup. */
907 #define XDP_WAKEUP_RX (1 << 0)
908 #define XDP_WAKEUP_TX (1 << 1)
910 #ifdef CONFIG_XFRM_OFFLOAD
912 int (*xdo_dev_state_add
) (struct xfrm_state
*x
);
913 void (*xdo_dev_state_delete
) (struct xfrm_state
*x
);
914 void (*xdo_dev_state_free
) (struct xfrm_state
*x
);
915 bool (*xdo_dev_offload_ok
) (struct sk_buff
*skb
,
916 struct xfrm_state
*x
);
917 void (*xdo_dev_state_advance_esn
) (struct xfrm_state
*x
);
922 struct rcu_head rcuhead
;
929 struct netdev_name_node
{
930 struct hlist_node hlist
;
931 struct list_head list
;
932 struct net_device
*dev
;
936 int netdev_name_node_alt_create(struct net_device
*dev
, const char *name
);
937 int netdev_name_node_alt_destroy(struct net_device
*dev
, const char *name
);
940 * This structure defines the management hooks for network devices.
941 * The following hooks can be defined; unless noted otherwise, they are
942 * optional and can be filled with a null pointer.
944 * int (*ndo_init)(struct net_device *dev);
945 * This function is called once when a network device is registered.
946 * The network device can use this for any late stage initialization
947 * or semantic validation. It can fail with an error code which will
948 * be propagated back to register_netdev.
950 * void (*ndo_uninit)(struct net_device *dev);
951 * This function is called when device is unregistered or when registration
952 * fails. It is not called if init fails.
954 * int (*ndo_open)(struct net_device *dev);
955 * This function is called when a network device transitions to the up
958 * int (*ndo_stop)(struct net_device *dev);
959 * This function is called when a network device transitions to the down
962 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
963 * struct net_device *dev);
964 * Called when a packet needs to be transmitted.
965 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
966 * the queue before that can happen; it's for obsolete devices and weird
967 * corner cases, but the stack really does a non-trivial amount
968 * of useless work if you return NETDEV_TX_BUSY.
969 * Required; cannot be NULL.
971 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
972 * struct net_device *dev
973 * netdev_features_t features);
974 * Called by core transmit path to determine if device is capable of
975 * performing offload operations on a given packet. This is to give
976 * the device an opportunity to implement any restrictions that cannot
977 * be otherwise expressed by feature flags. The check is called with
978 * the set of features that the stack has calculated and it returns
979 * those the driver believes to be appropriate.
981 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
982 * struct net_device *sb_dev);
983 * Called to decide which queue to use when device supports multiple
986 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
987 * This function is called to allow device receiver to make
988 * changes to configuration when multicast or promiscuous is enabled.
990 * void (*ndo_set_rx_mode)(struct net_device *dev);
991 * This function is called device changes address list filtering.
992 * If driver handles unicast address filtering, it should set
993 * IFF_UNICAST_FLT in its priv_flags.
995 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
996 * This function is called when the Media Access Control address
997 * needs to be changed. If this interface is not defined, the
998 * MAC address can not be changed.
1000 * int (*ndo_validate_addr)(struct net_device *dev);
1001 * Test if Media Access Control address is valid for the device.
1003 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1004 * Called when a user requests an ioctl which can't be handled by
1005 * the generic interface code. If not defined ioctls return
1006 * not supported error code.
1008 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1009 * Used to set network devices bus interface parameters. This interface
1010 * is retained for legacy reasons; new devices should use the bus
1011 * interface (PCI) for low level management.
1013 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1014 * Called when a user wants to change the Maximum Transfer Unit
1017 * void (*ndo_tx_timeout)(struct net_device *dev);
1018 * Callback used when the transmitter has not made any progress
1019 * for dev->watchdog ticks.
1021 * void (*ndo_get_stats64)(struct net_device *dev,
1022 * struct rtnl_link_stats64 *storage);
1023 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1024 * Called when a user wants to get the network device usage
1025 * statistics. Drivers must do one of the following:
1026 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1027 * rtnl_link_stats64 structure passed by the caller.
1028 * 2. Define @ndo_get_stats to update a net_device_stats structure
1029 * (which should normally be dev->stats) and return a pointer to
1030 * it. The structure may be changed asynchronously only if each
1031 * field is written atomically.
1032 * 3. Update dev->stats asynchronously and atomically, and define
1033 * neither operation.
1035 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1036 * Return true if this device supports offload stats of this attr_id.
1038 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1040 * Get statistics for offload operations by attr_id. Write it into the
1041 * attr_data pointer.
1043 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1044 * If device supports VLAN filtering this function is called when a
1045 * VLAN id is registered.
1047 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1048 * If device supports VLAN filtering this function is called when a
1049 * VLAN id is unregistered.
1051 * void (*ndo_poll_controller)(struct net_device *dev);
1053 * SR-IOV management functions.
1054 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1055 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1056 * u8 qos, __be16 proto);
1057 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1059 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1060 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1061 * int (*ndo_get_vf_config)(struct net_device *dev,
1062 * int vf, struct ifla_vf_info *ivf);
1063 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1064 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1065 * struct nlattr *port[]);
1067 * Enable or disable the VF ability to query its RSS Redirection Table and
1068 * Hash Key. This is needed since on some devices VF share this information
1069 * with PF and querying it may introduce a theoretical security risk.
1070 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1071 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1072 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1074 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1075 * This is always called from the stack with the rtnl lock held and netif
1076 * tx queues stopped. This allows the netdevice to perform queue
1077 * management safely.
1079 * Fiber Channel over Ethernet (FCoE) offload functions.
1080 * int (*ndo_fcoe_enable)(struct net_device *dev);
1081 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1082 * so the underlying device can perform whatever needed configuration or
1083 * initialization to support acceleration of FCoE traffic.
1085 * int (*ndo_fcoe_disable)(struct net_device *dev);
1086 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1087 * so the underlying device can perform whatever needed clean-ups to
1088 * stop supporting acceleration of FCoE traffic.
1090 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1091 * struct scatterlist *sgl, unsigned int sgc);
1092 * Called when the FCoE Initiator wants to initialize an I/O that
1093 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1094 * perform necessary setup and returns 1 to indicate the device is set up
1095 * successfully to perform DDP on this I/O, otherwise this returns 0.
1097 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1098 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1099 * indicated by the FC exchange id 'xid', so the underlying device can
1100 * clean up and reuse resources for later DDP requests.
1102 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1103 * struct scatterlist *sgl, unsigned int sgc);
1104 * Called when the FCoE Target wants to initialize an I/O that
1105 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1106 * perform necessary setup and returns 1 to indicate the device is set up
1107 * successfully to perform DDP on this I/O, otherwise this returns 0.
1109 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1110 * struct netdev_fcoe_hbainfo *hbainfo);
1111 * Called when the FCoE Protocol stack wants information on the underlying
1112 * device. This information is utilized by the FCoE protocol stack to
1113 * register attributes with Fiber Channel management service as per the
1114 * FC-GS Fabric Device Management Information(FDMI) specification.
1116 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1117 * Called when the underlying device wants to override default World Wide
1118 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1119 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1120 * protocol stack to use.
1123 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1124 * u16 rxq_index, u32 flow_id);
1125 * Set hardware filter for RFS. rxq_index is the target queue index;
1126 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1127 * Return the filter ID on success, or a negative error code.
1129 * Slave management functions (for bridge, bonding, etc).
1130 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1131 * Called to make another netdev an underling.
1133 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1134 * Called to release previously enslaved netdev.
1136 * Feature/offload setting functions.
1137 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1138 * netdev_features_t features);
1139 * Adjusts the requested feature flags according to device-specific
1140 * constraints, and returns the resulting flags. Must not modify
1143 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1144 * Called to update device configuration to new features. Passed
1145 * feature set might be less than what was returned by ndo_fix_features()).
1146 * Must return >0 or -errno if it changed dev->features itself.
1148 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1149 * struct net_device *dev,
1150 * const unsigned char *addr, u16 vid, u16 flags,
1151 * struct netlink_ext_ack *extack);
1152 * Adds an FDB entry to dev for addr.
1153 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1154 * struct net_device *dev,
1155 * const unsigned char *addr, u16 vid)
1156 * Deletes the FDB entry from dev coresponding to addr.
1157 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1158 * struct net_device *dev, struct net_device *filter_dev,
1160 * Used to add FDB entries to dump requests. Implementers should add
1161 * entries to skb and update idx with the number of entries.
1163 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1164 * u16 flags, struct netlink_ext_ack *extack)
1165 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1166 * struct net_device *dev, u32 filter_mask,
1168 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1171 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1172 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1173 * which do not represent real hardware may define this to allow their
1174 * userspace components to manage their virtual carrier state. Devices
1175 * that determine carrier state from physical hardware properties (eg
1176 * network cables) or protocol-dependent mechanisms (eg
1177 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1179 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1180 * struct netdev_phys_item_id *ppid);
1181 * Called to get ID of physical port of this device. If driver does
1182 * not implement this, it is assumed that the hw is not able to have
1183 * multiple net devices on single physical port.
1185 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1186 * struct netdev_phys_item_id *ppid)
1187 * Called to get the parent ID of the physical port of this device.
1189 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1190 * struct udp_tunnel_info *ti);
1191 * Called by UDP tunnel to notify a driver about the UDP port and socket
1192 * address family that a UDP tunnel is listnening to. It is called only
1193 * when a new port starts listening. The operation is protected by the
1196 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1197 * struct udp_tunnel_info *ti);
1198 * Called by UDP tunnel to notify the driver about a UDP port and socket
1199 * address family that the UDP tunnel is not listening to anymore. The
1200 * operation is protected by the RTNL.
1202 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1203 * struct net_device *dev)
1204 * Called by upper layer devices to accelerate switching or other
1205 * station functionality into hardware. 'pdev is the lowerdev
1206 * to use for the offload and 'dev' is the net device that will
1207 * back the offload. Returns a pointer to the private structure
1208 * the upper layer will maintain.
1209 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1210 * Called by upper layer device to delete the station created
1211 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1212 * the station and priv is the structure returned by the add
1214 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1215 * int queue_index, u32 maxrate);
1216 * Called when a user wants to set a max-rate limitation of specific
1218 * int (*ndo_get_iflink)(const struct net_device *dev);
1219 * Called to get the iflink value of this device.
1220 * void (*ndo_change_proto_down)(struct net_device *dev,
1222 * This function is used to pass protocol port error state information
1223 * to the switch driver. The switch driver can react to the proto_down
1224 * by doing a phys down on the associated switch port.
1225 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1226 * This function is used to get egress tunnel information for given skb.
1227 * This is useful for retrieving outer tunnel header parameters while
1229 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1230 * This function is used to specify the headroom that the skb must
1231 * consider when allocation skb during packet reception. Setting
1232 * appropriate rx headroom value allows avoiding skb head copy on
1233 * forward. Setting a negative value resets the rx headroom to the
1235 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1236 * This function is used to set or query state related to XDP on the
1237 * netdevice and manage BPF offload. See definition of
1238 * enum bpf_netdev_command for details.
1239 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1241 * This function is used to submit @n XDP packets for transmit on a
1242 * netdevice. Returns number of frames successfully transmitted, frames
1243 * that got dropped are freed/returned via xdp_return_frame().
1244 * Returns negative number, means general error invoking ndo, meaning
1245 * no frames were xmit'ed and core-caller will free all frames.
1246 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1247 * This function is used to wake up the softirq, ksoftirqd or kthread
1248 * responsible for sending and/or receiving packets on a specific
1249 * queue id bound to an AF_XDP socket. The flags field specifies if
1250 * only RX, only Tx, or both should be woken up using the flags
1251 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1252 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1253 * Get devlink port instance associated with a given netdev.
1254 * Called with a reference on the netdevice and devlink locks only,
1255 * rtnl_lock is not held.
1257 struct net_device_ops
{
1258 int (*ndo_init
)(struct net_device
*dev
);
1259 void (*ndo_uninit
)(struct net_device
*dev
);
1260 int (*ndo_open
)(struct net_device
*dev
);
1261 int (*ndo_stop
)(struct net_device
*dev
);
1262 netdev_tx_t (*ndo_start_xmit
)(struct sk_buff
*skb
,
1263 struct net_device
*dev
);
1264 netdev_features_t (*ndo_features_check
)(struct sk_buff
*skb
,
1265 struct net_device
*dev
,
1266 netdev_features_t features
);
1267 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1268 struct sk_buff
*skb
,
1269 struct net_device
*sb_dev
);
1270 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1272 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1273 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1275 int (*ndo_validate_addr
)(struct net_device
*dev
);
1276 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1277 struct ifreq
*ifr
, int cmd
);
1278 int (*ndo_set_config
)(struct net_device
*dev
,
1280 int (*ndo_change_mtu
)(struct net_device
*dev
,
1282 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1283 struct neigh_parms
*);
1284 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1286 void (*ndo_get_stats64
)(struct net_device
*dev
,
1287 struct rtnl_link_stats64
*storage
);
1288 bool (*ndo_has_offload_stats
)(const struct net_device
*dev
, int attr_id
);
1289 int (*ndo_get_offload_stats
)(int attr_id
,
1290 const struct net_device
*dev
,
1292 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1294 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1295 __be16 proto
, u16 vid
);
1296 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1297 __be16 proto
, u16 vid
);
1298 #ifdef CONFIG_NET_POLL_CONTROLLER
1299 void (*ndo_poll_controller
)(struct net_device
*dev
);
1300 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1301 struct netpoll_info
*info
);
1302 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1304 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1305 int queue
, u8
*mac
);
1306 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1307 int queue
, u16 vlan
,
1308 u8 qos
, __be16 proto
);
1309 int (*ndo_set_vf_rate
)(struct net_device
*dev
,
1310 int vf
, int min_tx_rate
,
1312 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1313 int vf
, bool setting
);
1314 int (*ndo_set_vf_trust
)(struct net_device
*dev
,
1315 int vf
, bool setting
);
1316 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1318 struct ifla_vf_info
*ivf
);
1319 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1320 int vf
, int link_state
);
1321 int (*ndo_get_vf_stats
)(struct net_device
*dev
,
1323 struct ifla_vf_stats
1325 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1327 struct nlattr
*port
[]);
1328 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1329 int vf
, struct sk_buff
*skb
);
1330 int (*ndo_set_vf_guid
)(struct net_device
*dev
,
1333 int (*ndo_set_vf_rss_query_en
)(
1334 struct net_device
*dev
,
1335 int vf
, bool setting
);
1336 int (*ndo_setup_tc
)(struct net_device
*dev
,
1337 enum tc_setup_type type
,
1339 #if IS_ENABLED(CONFIG_FCOE)
1340 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1341 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1342 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1344 struct scatterlist
*sgl
,
1346 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1348 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1350 struct scatterlist
*sgl
,
1352 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1353 struct netdev_fcoe_hbainfo
*hbainfo
);
1356 #if IS_ENABLED(CONFIG_LIBFCOE)
1357 #define NETDEV_FCOE_WWNN 0
1358 #define NETDEV_FCOE_WWPN 1
1359 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1360 u64
*wwn
, int type
);
1363 #ifdef CONFIG_RFS_ACCEL
1364 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1365 const struct sk_buff
*skb
,
1369 int (*ndo_add_slave
)(struct net_device
*dev
,
1370 struct net_device
*slave_dev
,
1371 struct netlink_ext_ack
*extack
);
1372 int (*ndo_del_slave
)(struct net_device
*dev
,
1373 struct net_device
*slave_dev
);
1374 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1375 netdev_features_t features
);
1376 int (*ndo_set_features
)(struct net_device
*dev
,
1377 netdev_features_t features
);
1378 int (*ndo_neigh_construct
)(struct net_device
*dev
,
1379 struct neighbour
*n
);
1380 void (*ndo_neigh_destroy
)(struct net_device
*dev
,
1381 struct neighbour
*n
);
1383 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1384 struct nlattr
*tb
[],
1385 struct net_device
*dev
,
1386 const unsigned char *addr
,
1389 struct netlink_ext_ack
*extack
);
1390 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1391 struct nlattr
*tb
[],
1392 struct net_device
*dev
,
1393 const unsigned char *addr
,
1395 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1396 struct netlink_callback
*cb
,
1397 struct net_device
*dev
,
1398 struct net_device
*filter_dev
,
1400 int (*ndo_fdb_get
)(struct sk_buff
*skb
,
1401 struct nlattr
*tb
[],
1402 struct net_device
*dev
,
1403 const unsigned char *addr
,
1404 u16 vid
, u32 portid
, u32 seq
,
1405 struct netlink_ext_ack
*extack
);
1406 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1407 struct nlmsghdr
*nlh
,
1409 struct netlink_ext_ack
*extack
);
1410 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1412 struct net_device
*dev
,
1415 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1416 struct nlmsghdr
*nlh
,
1418 int (*ndo_change_carrier
)(struct net_device
*dev
,
1420 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1421 struct netdev_phys_item_id
*ppid
);
1422 int (*ndo_get_port_parent_id
)(struct net_device
*dev
,
1423 struct netdev_phys_item_id
*ppid
);
1424 int (*ndo_get_phys_port_name
)(struct net_device
*dev
,
1425 char *name
, size_t len
);
1426 void (*ndo_udp_tunnel_add
)(struct net_device
*dev
,
1427 struct udp_tunnel_info
*ti
);
1428 void (*ndo_udp_tunnel_del
)(struct net_device
*dev
,
1429 struct udp_tunnel_info
*ti
);
1430 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1431 struct net_device
*dev
);
1432 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1435 int (*ndo_set_tx_maxrate
)(struct net_device
*dev
,
1438 int (*ndo_get_iflink
)(const struct net_device
*dev
);
1439 int (*ndo_change_proto_down
)(struct net_device
*dev
,
1441 int (*ndo_fill_metadata_dst
)(struct net_device
*dev
,
1442 struct sk_buff
*skb
);
1443 void (*ndo_set_rx_headroom
)(struct net_device
*dev
,
1444 int needed_headroom
);
1445 int (*ndo_bpf
)(struct net_device
*dev
,
1446 struct netdev_bpf
*bpf
);
1447 int (*ndo_xdp_xmit
)(struct net_device
*dev
, int n
,
1448 struct xdp_frame
**xdp
,
1450 int (*ndo_xsk_wakeup
)(struct net_device
*dev
,
1451 u32 queue_id
, u32 flags
);
1452 struct devlink_port
* (*ndo_get_devlink_port
)(struct net_device
*dev
);
1456 * enum net_device_priv_flags - &struct net_device priv_flags
1458 * These are the &struct net_device, they are only set internally
1459 * by drivers and used in the kernel. These flags are invisible to
1460 * userspace; this means that the order of these flags can change
1461 * during any kernel release.
1463 * You should have a pretty good reason to be extending these flags.
1465 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1466 * @IFF_EBRIDGE: Ethernet bridging device
1467 * @IFF_BONDING: bonding master or slave
1468 * @IFF_ISATAP: ISATAP interface (RFC4214)
1469 * @IFF_WAN_HDLC: WAN HDLC device
1470 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1472 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1473 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1474 * @IFF_MACVLAN_PORT: device used as macvlan port
1475 * @IFF_BRIDGE_PORT: device used as bridge port
1476 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1477 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1478 * @IFF_UNICAST_FLT: Supports unicast filtering
1479 * @IFF_TEAM_PORT: device used as team port
1480 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1481 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1482 * change when it's running
1483 * @IFF_MACVLAN: Macvlan device
1484 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1485 * underlying stacked devices
1486 * @IFF_L3MDEV_MASTER: device is an L3 master device
1487 * @IFF_NO_QUEUE: device can run without qdisc attached
1488 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1489 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1490 * @IFF_TEAM: device is a team device
1491 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1492 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1493 * entity (i.e. the master device for bridged veth)
1494 * @IFF_MACSEC: device is a MACsec device
1495 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1496 * @IFF_FAILOVER: device is a failover master device
1497 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1498 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1499 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1501 enum netdev_priv_flags
{
1502 IFF_802_1Q_VLAN
= 1<<0,
1506 IFF_WAN_HDLC
= 1<<4,
1507 IFF_XMIT_DST_RELEASE
= 1<<5,
1508 IFF_DONT_BRIDGE
= 1<<6,
1509 IFF_DISABLE_NETPOLL
= 1<<7,
1510 IFF_MACVLAN_PORT
= 1<<8,
1511 IFF_BRIDGE_PORT
= 1<<9,
1512 IFF_OVS_DATAPATH
= 1<<10,
1513 IFF_TX_SKB_SHARING
= 1<<11,
1514 IFF_UNICAST_FLT
= 1<<12,
1515 IFF_TEAM_PORT
= 1<<13,
1516 IFF_SUPP_NOFCS
= 1<<14,
1517 IFF_LIVE_ADDR_CHANGE
= 1<<15,
1518 IFF_MACVLAN
= 1<<16,
1519 IFF_XMIT_DST_RELEASE_PERM
= 1<<17,
1520 IFF_L3MDEV_MASTER
= 1<<18,
1521 IFF_NO_QUEUE
= 1<<19,
1522 IFF_OPENVSWITCH
= 1<<20,
1523 IFF_L3MDEV_SLAVE
= 1<<21,
1525 IFF_RXFH_CONFIGURED
= 1<<23,
1526 IFF_PHONY_HEADROOM
= 1<<24,
1528 IFF_NO_RX_HANDLER
= 1<<26,
1529 IFF_FAILOVER
= 1<<27,
1530 IFF_FAILOVER_SLAVE
= 1<<28,
1531 IFF_L3MDEV_RX_HANDLER
= 1<<29,
1532 IFF_LIVE_RENAME_OK
= 1<<30,
1535 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1536 #define IFF_EBRIDGE IFF_EBRIDGE
1537 #define IFF_BONDING IFF_BONDING
1538 #define IFF_ISATAP IFF_ISATAP
1539 #define IFF_WAN_HDLC IFF_WAN_HDLC
1540 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1541 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1542 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1543 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1544 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1545 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1546 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1547 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1548 #define IFF_TEAM_PORT IFF_TEAM_PORT
1549 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1550 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1551 #define IFF_MACVLAN IFF_MACVLAN
1552 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1553 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1554 #define IFF_NO_QUEUE IFF_NO_QUEUE
1555 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1556 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1557 #define IFF_TEAM IFF_TEAM
1558 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1559 #define IFF_MACSEC IFF_MACSEC
1560 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1561 #define IFF_FAILOVER IFF_FAILOVER
1562 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1563 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1564 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1567 * struct net_device - The DEVICE structure.
1569 * Actually, this whole structure is a big mistake. It mixes I/O
1570 * data with strictly "high-level" data, and it has to know about
1571 * almost every data structure used in the INET module.
1573 * @name: This is the first field of the "visible" part of this structure
1574 * (i.e. as seen by users in the "Space.c" file). It is the name
1577 * @name_node: Name hashlist node
1578 * @ifalias: SNMP alias
1579 * @mem_end: Shared memory end
1580 * @mem_start: Shared memory start
1581 * @base_addr: Device I/O address
1582 * @irq: Device IRQ number
1584 * @state: Generic network queuing layer state, see netdev_state_t
1585 * @dev_list: The global list of network devices
1586 * @napi_list: List entry used for polling NAPI devices
1587 * @unreg_list: List entry when we are unregistering the
1588 * device; see the function unregister_netdev
1589 * @close_list: List entry used when we are closing the device
1590 * @ptype_all: Device-specific packet handlers for all protocols
1591 * @ptype_specific: Device-specific, protocol-specific packet handlers
1593 * @adj_list: Directly linked devices, like slaves for bonding
1594 * @features: Currently active device features
1595 * @hw_features: User-changeable features
1597 * @wanted_features: User-requested features
1598 * @vlan_features: Mask of features inheritable by VLAN devices
1600 * @hw_enc_features: Mask of features inherited by encapsulating devices
1601 * This field indicates what encapsulation
1602 * offloads the hardware is capable of doing,
1603 * and drivers will need to set them appropriately.
1605 * @mpls_features: Mask of features inheritable by MPLS
1607 * @ifindex: interface index
1608 * @group: The group the device belongs to
1610 * @stats: Statistics struct, which was left as a legacy, use
1611 * rtnl_link_stats64 instead
1613 * @rx_dropped: Dropped packets by core network,
1614 * do not use this in drivers
1615 * @tx_dropped: Dropped packets by core network,
1616 * do not use this in drivers
1617 * @rx_nohandler: nohandler dropped packets by core network on
1618 * inactive devices, do not use this in drivers
1619 * @carrier_up_count: Number of times the carrier has been up
1620 * @carrier_down_count: Number of times the carrier has been down
1622 * @wireless_handlers: List of functions to handle Wireless Extensions,
1624 * see <net/iw_handler.h> for details.
1625 * @wireless_data: Instance data managed by the core of wireless extensions
1627 * @netdev_ops: Includes several pointers to callbacks,
1628 * if one wants to override the ndo_*() functions
1629 * @ethtool_ops: Management operations
1630 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1631 * discovery handling. Necessary for e.g. 6LoWPAN.
1632 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1633 * of Layer 2 headers.
1635 * @flags: Interface flags (a la BSD)
1636 * @priv_flags: Like 'flags' but invisible to userspace,
1637 * see if.h for the definitions
1638 * @gflags: Global flags ( kept as legacy )
1639 * @padded: How much padding added by alloc_netdev()
1640 * @operstate: RFC2863 operstate
1641 * @link_mode: Mapping policy to operstate
1642 * @if_port: Selectable AUI, TP, ...
1644 * @mtu: Interface MTU value
1645 * @min_mtu: Interface Minimum MTU value
1646 * @max_mtu: Interface Maximum MTU value
1647 * @type: Interface hardware type
1648 * @hard_header_len: Maximum hardware header length.
1649 * @min_header_len: Minimum hardware header length
1651 * @needed_headroom: Extra headroom the hardware may need, but not in all
1652 * cases can this be guaranteed
1653 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1654 * cases can this be guaranteed. Some cases also use
1655 * LL_MAX_HEADER instead to allocate the skb
1657 * interface address info:
1659 * @perm_addr: Permanent hw address
1660 * @addr_assign_type: Hw address assignment type
1661 * @addr_len: Hardware address length
1662 * @upper_level: Maximum depth level of upper devices.
1663 * @lower_level: Maximum depth level of lower devices.
1664 * @neigh_priv_len: Used in neigh_alloc()
1665 * @dev_id: Used to differentiate devices that share
1666 * the same link layer address
1667 * @dev_port: Used to differentiate devices that share
1669 * @addr_list_lock: XXX: need comments on this one
1670 * @uc_promisc: Counter that indicates promiscuous mode
1671 * has been enabled due to the need to listen to
1672 * additional unicast addresses in a device that
1673 * does not implement ndo_set_rx_mode()
1674 * @uc: unicast mac addresses
1675 * @mc: multicast mac addresses
1676 * @dev_addrs: list of device hw addresses
1677 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1678 * @promiscuity: Number of times the NIC is told to work in
1679 * promiscuous mode; if it becomes 0 the NIC will
1680 * exit promiscuous mode
1681 * @allmulti: Counter, enables or disables allmulticast mode
1683 * @vlan_info: VLAN info
1684 * @dsa_ptr: dsa specific data
1685 * @tipc_ptr: TIPC specific data
1686 * @atalk_ptr: AppleTalk link
1687 * @ip_ptr: IPv4 specific data
1688 * @dn_ptr: DECnet specific data
1689 * @ip6_ptr: IPv6 specific data
1690 * @ax25_ptr: AX.25 specific data
1691 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1693 * @dev_addr: Hw address (before bcast,
1694 * because most packets are unicast)
1696 * @_rx: Array of RX queues
1697 * @num_rx_queues: Number of RX queues
1698 * allocated at register_netdev() time
1699 * @real_num_rx_queues: Number of RX queues currently active in device
1701 * @rx_handler: handler for received packets
1702 * @rx_handler_data: XXX: need comments on this one
1703 * @miniq_ingress: ingress/clsact qdisc specific data for
1704 * ingress processing
1705 * @ingress_queue: XXX: need comments on this one
1706 * @broadcast: hw bcast address
1708 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1709 * indexed by RX queue number. Assigned by driver.
1710 * This must only be set if the ndo_rx_flow_steer
1711 * operation is defined
1712 * @index_hlist: Device index hash chain
1714 * @_tx: Array of TX queues
1715 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1716 * @real_num_tx_queues: Number of TX queues currently active in device
1717 * @qdisc: Root qdisc from userspace point of view
1718 * @tx_queue_len: Max frames per queue allowed
1719 * @tx_global_lock: XXX: need comments on this one
1721 * @xps_maps: XXX: need comments on this one
1722 * @miniq_egress: clsact qdisc specific data for
1724 * @watchdog_timeo: Represents the timeout that is used by
1725 * the watchdog (see dev_watchdog())
1726 * @watchdog_timer: List of timers
1728 * @pcpu_refcnt: Number of references to this device
1729 * @todo_list: Delayed register/unregister
1730 * @link_watch_list: XXX: need comments on this one
1732 * @reg_state: Register/unregister state machine
1733 * @dismantle: Device is going to be freed
1734 * @rtnl_link_state: This enum represents the phases of creating
1737 * @needs_free_netdev: Should unregister perform free_netdev?
1738 * @priv_destructor: Called from unregister
1739 * @npinfo: XXX: need comments on this one
1740 * @nd_net: Network namespace this network device is inside
1742 * @ml_priv: Mid-layer private
1743 * @lstats: Loopback statistics
1744 * @tstats: Tunnel statistics
1745 * @dstats: Dummy statistics
1746 * @vstats: Virtual ethernet statistics
1751 * @dev: Class/net/name entry
1752 * @sysfs_groups: Space for optional device, statistics and wireless
1755 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1756 * @rtnl_link_ops: Rtnl_link_ops
1758 * @gso_max_size: Maximum size of generic segmentation offload
1759 * @gso_max_segs: Maximum number of segments that can be passed to the
1762 * @dcbnl_ops: Data Center Bridging netlink ops
1763 * @num_tc: Number of traffic classes in the net device
1764 * @tc_to_txq: XXX: need comments on this one
1765 * @prio_tc_map: XXX: need comments on this one
1767 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1769 * @priomap: XXX: need comments on this one
1770 * @phydev: Physical device may attach itself
1771 * for hardware timestamping
1772 * @sfp_bus: attached &struct sfp_bus structure.
1773 * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
1775 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1776 * @qdisc_xmit_lock_key: lockdep class annotating
1777 * netdev_queue->_xmit_lock spinlock
1778 * @addr_list_lock_key: lockdep class annotating
1779 * net_device->addr_list_lock spinlock
1781 * @proto_down: protocol port state information can be sent to the
1782 * switch driver and used to set the phys state of the
1785 * @wol_enabled: Wake-on-LAN is enabled
1787 * FIXME: cleanup struct net_device such that network protocol info
1792 char name
[IFNAMSIZ
];
1793 struct netdev_name_node
*name_node
;
1794 struct dev_ifalias __rcu
*ifalias
;
1796 * I/O specific fields
1797 * FIXME: Merge these and struct ifmap into one
1799 unsigned long mem_end
;
1800 unsigned long mem_start
;
1801 unsigned long base_addr
;
1805 * Some hardware also needs these fields (state,dev_list,
1806 * napi_list,unreg_list,close_list) but they are not
1807 * part of the usual set specified in Space.c.
1810 unsigned long state
;
1812 struct list_head dev_list
;
1813 struct list_head napi_list
;
1814 struct list_head unreg_list
;
1815 struct list_head close_list
;
1816 struct list_head ptype_all
;
1817 struct list_head ptype_specific
;
1820 struct list_head upper
;
1821 struct list_head lower
;
1824 netdev_features_t features
;
1825 netdev_features_t hw_features
;
1826 netdev_features_t wanted_features
;
1827 netdev_features_t vlan_features
;
1828 netdev_features_t hw_enc_features
;
1829 netdev_features_t mpls_features
;
1830 netdev_features_t gso_partial_features
;
1835 struct net_device_stats stats
;
1837 atomic_long_t rx_dropped
;
1838 atomic_long_t tx_dropped
;
1839 atomic_long_t rx_nohandler
;
1841 /* Stats to monitor link on/off, flapping */
1842 atomic_t carrier_up_count
;
1843 atomic_t carrier_down_count
;
1845 #ifdef CONFIG_WIRELESS_EXT
1846 const struct iw_handler_def
*wireless_handlers
;
1847 struct iw_public_data
*wireless_data
;
1849 const struct net_device_ops
*netdev_ops
;
1850 const struct ethtool_ops
*ethtool_ops
;
1851 #ifdef CONFIG_NET_L3_MASTER_DEV
1852 const struct l3mdev_ops
*l3mdev_ops
;
1854 #if IS_ENABLED(CONFIG_IPV6)
1855 const struct ndisc_ops
*ndisc_ops
;
1858 #ifdef CONFIG_XFRM_OFFLOAD
1859 const struct xfrmdev_ops
*xfrmdev_ops
;
1862 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1863 const struct tlsdev_ops
*tlsdev_ops
;
1866 const struct header_ops
*header_ops
;
1869 unsigned int priv_flags
;
1871 unsigned short gflags
;
1872 unsigned short padded
;
1874 unsigned char operstate
;
1875 unsigned char link_mode
;
1877 unsigned char if_port
;
1881 unsigned int min_mtu
;
1882 unsigned int max_mtu
;
1883 unsigned short type
;
1884 unsigned short hard_header_len
;
1885 unsigned char min_header_len
;
1887 unsigned short needed_headroom
;
1888 unsigned short needed_tailroom
;
1890 /* Interface address info. */
1891 unsigned char perm_addr
[MAX_ADDR_LEN
];
1892 unsigned char addr_assign_type
;
1893 unsigned char addr_len
;
1894 unsigned char upper_level
;
1895 unsigned char lower_level
;
1896 unsigned short neigh_priv_len
;
1897 unsigned short dev_id
;
1898 unsigned short dev_port
;
1899 spinlock_t addr_list_lock
;
1900 unsigned char name_assign_type
;
1902 struct netdev_hw_addr_list uc
;
1903 struct netdev_hw_addr_list mc
;
1904 struct netdev_hw_addr_list dev_addrs
;
1907 struct kset
*queues_kset
;
1909 unsigned int promiscuity
;
1910 unsigned int allmulti
;
1913 /* Protocol-specific pointers */
1915 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1916 struct vlan_info __rcu
*vlan_info
;
1918 #if IS_ENABLED(CONFIG_NET_DSA)
1919 struct dsa_port
*dsa_ptr
;
1921 #if IS_ENABLED(CONFIG_TIPC)
1922 struct tipc_bearer __rcu
*tipc_ptr
;
1924 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1927 struct in_device __rcu
*ip_ptr
;
1928 #if IS_ENABLED(CONFIG_DECNET)
1929 struct dn_dev __rcu
*dn_ptr
;
1931 struct inet6_dev __rcu
*ip6_ptr
;
1932 #if IS_ENABLED(CONFIG_AX25)
1935 struct wireless_dev
*ieee80211_ptr
;
1936 struct wpan_dev
*ieee802154_ptr
;
1937 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1938 struct mpls_dev __rcu
*mpls_ptr
;
1942 * Cache lines mostly used on receive path (including eth_type_trans())
1944 /* Interface address info used in eth_type_trans() */
1945 unsigned char *dev_addr
;
1947 struct netdev_rx_queue
*_rx
;
1948 unsigned int num_rx_queues
;
1949 unsigned int real_num_rx_queues
;
1951 struct bpf_prog __rcu
*xdp_prog
;
1952 unsigned long gro_flush_timeout
;
1953 rx_handler_func_t __rcu
*rx_handler
;
1954 void __rcu
*rx_handler_data
;
1956 #ifdef CONFIG_NET_CLS_ACT
1957 struct mini_Qdisc __rcu
*miniq_ingress
;
1959 struct netdev_queue __rcu
*ingress_queue
;
1960 #ifdef CONFIG_NETFILTER_INGRESS
1961 struct nf_hook_entries __rcu
*nf_hooks_ingress
;
1964 unsigned char broadcast
[MAX_ADDR_LEN
];
1965 #ifdef CONFIG_RFS_ACCEL
1966 struct cpu_rmap
*rx_cpu_rmap
;
1968 struct hlist_node index_hlist
;
1971 * Cache lines mostly used on transmit path
1973 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1974 unsigned int num_tx_queues
;
1975 unsigned int real_num_tx_queues
;
1976 struct Qdisc
*qdisc
;
1977 #ifdef CONFIG_NET_SCHED
1978 DECLARE_HASHTABLE (qdisc_hash
, 4);
1980 unsigned int tx_queue_len
;
1981 spinlock_t tx_global_lock
;
1985 struct xps_dev_maps __rcu
*xps_cpus_map
;
1986 struct xps_dev_maps __rcu
*xps_rxqs_map
;
1988 #ifdef CONFIG_NET_CLS_ACT
1989 struct mini_Qdisc __rcu
*miniq_egress
;
1992 /* These may be needed for future network-power-down code. */
1993 struct timer_list watchdog_timer
;
1995 int __percpu
*pcpu_refcnt
;
1996 struct list_head todo_list
;
1998 struct list_head link_watch_list
;
2000 enum { NETREG_UNINITIALIZED
=0,
2001 NETREG_REGISTERED
, /* completed register_netdevice */
2002 NETREG_UNREGISTERING
, /* called unregister_netdevice */
2003 NETREG_UNREGISTERED
, /* completed unregister todo */
2004 NETREG_RELEASED
, /* called free_netdev */
2005 NETREG_DUMMY
, /* dummy device for NAPI poll */
2011 RTNL_LINK_INITIALIZED
,
2012 RTNL_LINK_INITIALIZING
,
2013 } rtnl_link_state
:16;
2015 bool needs_free_netdev
;
2016 void (*priv_destructor
)(struct net_device
*dev
);
2018 #ifdef CONFIG_NETPOLL
2019 struct netpoll_info __rcu
*npinfo
;
2022 possible_net_t nd_net
;
2024 /* mid-layer private */
2027 struct pcpu_lstats __percpu
*lstats
;
2028 struct pcpu_sw_netstats __percpu
*tstats
;
2029 struct pcpu_dstats __percpu
*dstats
;
2032 #if IS_ENABLED(CONFIG_GARP)
2033 struct garp_port __rcu
*garp_port
;
2035 #if IS_ENABLED(CONFIG_MRP)
2036 struct mrp_port __rcu
*mrp_port
;
2040 const struct attribute_group
*sysfs_groups
[4];
2041 const struct attribute_group
*sysfs_rx_queue_group
;
2043 const struct rtnl_link_ops
*rtnl_link_ops
;
2045 /* for setting kernel sock attribute on TCP connection setup */
2046 #define GSO_MAX_SIZE 65536
2047 unsigned int gso_max_size
;
2048 #define GSO_MAX_SEGS 65535
2052 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
2055 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
2056 u8 prio_tc_map
[TC_BITMASK
+ 1];
2058 #if IS_ENABLED(CONFIG_FCOE)
2059 unsigned int fcoe_ddp_xid
;
2061 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2062 struct netprio_map __rcu
*priomap
;
2064 struct phy_device
*phydev
;
2065 struct sfp_bus
*sfp_bus
;
2066 struct lock_class_key qdisc_tx_busylock_key
;
2067 struct lock_class_key qdisc_running_key
;
2068 struct lock_class_key qdisc_xmit_lock_key
;
2069 struct lock_class_key addr_list_lock_key
;
2071 unsigned wol_enabled
:1;
2073 #define to_net_dev(d) container_of(d, struct net_device, dev)
2075 static inline bool netif_elide_gro(const struct net_device
*dev
)
2077 if (!(dev
->features
& NETIF_F_GRO
) || dev
->xdp_prog
)
2082 #define NETDEV_ALIGN 32
2085 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
2087 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
2091 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
2093 if (tc
>= dev
->num_tc
)
2096 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
2100 int netdev_txq_to_tc(struct net_device
*dev
, unsigned int txq
);
2101 void netdev_reset_tc(struct net_device
*dev
);
2102 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
);
2103 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
);
2106 int netdev_get_num_tc(struct net_device
*dev
)
2111 void netdev_unbind_sb_channel(struct net_device
*dev
,
2112 struct net_device
*sb_dev
);
2113 int netdev_bind_sb_channel_queue(struct net_device
*dev
,
2114 struct net_device
*sb_dev
,
2115 u8 tc
, u16 count
, u16 offset
);
2116 int netdev_set_sb_channel(struct net_device
*dev
, u16 channel
);
2117 static inline int netdev_get_sb_channel(struct net_device
*dev
)
2119 return max_t(int, -dev
->num_tc
, 0);
2123 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
2126 return &dev
->_tx
[index
];
2129 static inline struct netdev_queue
*skb_get_tx_queue(const struct net_device
*dev
,
2130 const struct sk_buff
*skb
)
2132 return netdev_get_tx_queue(dev
, skb_get_queue_mapping(skb
));
2135 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
2136 void (*f
)(struct net_device
*,
2137 struct netdev_queue
*,
2143 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2144 f(dev
, &dev
->_tx
[i
], arg
);
2147 u16
netdev_pick_tx(struct net_device
*dev
, struct sk_buff
*skb
,
2148 struct net_device
*sb_dev
);
2149 struct netdev_queue
*netdev_core_pick_tx(struct net_device
*dev
,
2150 struct sk_buff
*skb
,
2151 struct net_device
*sb_dev
);
2153 /* returns the headroom that the master device needs to take in account
2154 * when forwarding to this dev
2156 static inline unsigned netdev_get_fwd_headroom(struct net_device
*dev
)
2158 return dev
->priv_flags
& IFF_PHONY_HEADROOM
? 0 : dev
->needed_headroom
;
2161 static inline void netdev_set_rx_headroom(struct net_device
*dev
, int new_hr
)
2163 if (dev
->netdev_ops
->ndo_set_rx_headroom
)
2164 dev
->netdev_ops
->ndo_set_rx_headroom(dev
, new_hr
);
2167 /* set the device rx headroom to the dev's default */
2168 static inline void netdev_reset_rx_headroom(struct net_device
*dev
)
2170 netdev_set_rx_headroom(dev
, -1);
2174 * Net namespace inlines
2177 struct net
*dev_net(const struct net_device
*dev
)
2179 return read_pnet(&dev
->nd_net
);
2183 void dev_net_set(struct net_device
*dev
, struct net
*net
)
2185 write_pnet(&dev
->nd_net
, net
);
2189 * netdev_priv - access network device private data
2190 * @dev: network device
2192 * Get network device private data
2194 static inline void *netdev_priv(const struct net_device
*dev
)
2196 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
2199 /* Set the sysfs physical device reference for the network logical device
2200 * if set prior to registration will cause a symlink during initialization.
2202 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2204 /* Set the sysfs device type for the network logical device to allow
2205 * fine-grained identification of different network device types. For
2206 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2208 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2210 /* Default NAPI poll() weight
2211 * Device drivers are strongly advised to not use bigger value
2213 #define NAPI_POLL_WEIGHT 64
2216 * netif_napi_add - initialize a NAPI context
2217 * @dev: network device
2218 * @napi: NAPI context
2219 * @poll: polling function
2220 * @weight: default weight
2222 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2223 * *any* of the other NAPI-related functions.
2225 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
2226 int (*poll
)(struct napi_struct
*, int), int weight
);
2229 * netif_tx_napi_add - initialize a NAPI context
2230 * @dev: network device
2231 * @napi: NAPI context
2232 * @poll: polling function
2233 * @weight: default weight
2235 * This variant of netif_napi_add() should be used from drivers using NAPI
2236 * to exclusively poll a TX queue.
2237 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2239 static inline void netif_tx_napi_add(struct net_device
*dev
,
2240 struct napi_struct
*napi
,
2241 int (*poll
)(struct napi_struct
*, int),
2244 set_bit(NAPI_STATE_NO_BUSY_POLL
, &napi
->state
);
2245 netif_napi_add(dev
, napi
, poll
, weight
);
2249 * netif_napi_del - remove a NAPI context
2250 * @napi: NAPI context
2252 * netif_napi_del() removes a NAPI context from the network device NAPI list
2254 void netif_napi_del(struct napi_struct
*napi
);
2256 struct napi_gro_cb
{
2257 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2260 /* Length of frag0. */
2261 unsigned int frag0_len
;
2263 /* This indicates where we are processing relative to skb->data. */
2266 /* This is non-zero if the packet cannot be merged with the new skb. */
2269 /* Save the IP ID here and check when we get to the transport layer */
2272 /* Number of segments aggregated. */
2275 /* Start offset for remote checksum offload */
2276 u16 gro_remcsum_start
;
2278 /* jiffies when first packet was created/queued */
2281 /* Used in ipv6_gro_receive() and foo-over-udp */
2284 /* This is non-zero if the packet may be of the same flow. */
2287 /* Used in tunnel GRO receive */
2290 /* GRO checksum is valid */
2293 /* Number of checksums via CHECKSUM_UNNECESSARY */
2298 #define NAPI_GRO_FREE 1
2299 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2301 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2304 /* Used in GRE, set in fou/gue_gro_receive */
2307 /* Used to determine if flush_id can be ignored */
2310 /* Number of gro_receive callbacks this packet already went through */
2311 u8 recursion_counter
:4;
2315 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2318 /* used in skb_gro_receive() slow path */
2319 struct sk_buff
*last
;
2322 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2324 #define GRO_RECURSION_LIMIT 15
2325 static inline int gro_recursion_inc_test(struct sk_buff
*skb
)
2327 return ++NAPI_GRO_CB(skb
)->recursion_counter
== GRO_RECURSION_LIMIT
;
2330 typedef struct sk_buff
*(*gro_receive_t
)(struct list_head
*, struct sk_buff
*);
2331 static inline struct sk_buff
*call_gro_receive(gro_receive_t cb
,
2332 struct list_head
*head
,
2333 struct sk_buff
*skb
)
2335 if (unlikely(gro_recursion_inc_test(skb
))) {
2336 NAPI_GRO_CB(skb
)->flush
|= 1;
2340 return cb(head
, skb
);
2343 typedef struct sk_buff
*(*gro_receive_sk_t
)(struct sock
*, struct list_head
*,
2345 static inline struct sk_buff
*call_gro_receive_sk(gro_receive_sk_t cb
,
2347 struct list_head
*head
,
2348 struct sk_buff
*skb
)
2350 if (unlikely(gro_recursion_inc_test(skb
))) {
2351 NAPI_GRO_CB(skb
)->flush
|= 1;
2355 return cb(sk
, head
, skb
);
2358 struct packet_type
{
2359 __be16 type
; /* This is really htons(ether_type). */
2360 bool ignore_outgoing
;
2361 struct net_device
*dev
; /* NULL is wildcarded here */
2362 int (*func
) (struct sk_buff
*,
2363 struct net_device
*,
2364 struct packet_type
*,
2365 struct net_device
*);
2366 void (*list_func
) (struct list_head
*,
2367 struct packet_type
*,
2368 struct net_device
*);
2369 bool (*id_match
)(struct packet_type
*ptype
,
2371 void *af_packet_priv
;
2372 struct list_head list
;
2375 struct offload_callbacks
{
2376 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
2377 netdev_features_t features
);
2378 struct sk_buff
*(*gro_receive
)(struct list_head
*head
,
2379 struct sk_buff
*skb
);
2380 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
2383 struct packet_offload
{
2384 __be16 type
; /* This is really htons(ether_type). */
2386 struct offload_callbacks callbacks
;
2387 struct list_head list
;
2390 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2391 struct pcpu_sw_netstats
{
2396 struct u64_stats_sync syncp
;
2397 } __aligned(4 * sizeof(u64
));
2399 struct pcpu_lstats
{
2400 u64_stats_t packets
;
2402 struct u64_stats_sync syncp
;
2403 } __aligned(2 * sizeof(u64
));
2405 void dev_lstats_read(struct net_device
*dev
, u64
*packets
, u64
*bytes
);
2407 static inline void dev_lstats_add(struct net_device
*dev
, unsigned int len
)
2409 struct pcpu_lstats
*lstats
= this_cpu_ptr(dev
->lstats
);
2411 u64_stats_update_begin(&lstats
->syncp
);
2412 u64_stats_add(&lstats
->bytes
, len
);
2413 u64_stats_inc(&lstats
->packets
);
2414 u64_stats_update_end(&lstats
->syncp
);
2417 #define __netdev_alloc_pcpu_stats(type, gfp) \
2419 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2422 for_each_possible_cpu(__cpu) { \
2423 typeof(type) *stat; \
2424 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2425 u64_stats_init(&stat->syncp); \
2431 #define netdev_alloc_pcpu_stats(type) \
2432 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2434 enum netdev_lag_tx_type
{
2435 NETDEV_LAG_TX_TYPE_UNKNOWN
,
2436 NETDEV_LAG_TX_TYPE_RANDOM
,
2437 NETDEV_LAG_TX_TYPE_BROADCAST
,
2438 NETDEV_LAG_TX_TYPE_ROUNDROBIN
,
2439 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
,
2440 NETDEV_LAG_TX_TYPE_HASH
,
2443 enum netdev_lag_hash
{
2444 NETDEV_LAG_HASH_NONE
,
2446 NETDEV_LAG_HASH_L34
,
2447 NETDEV_LAG_HASH_L23
,
2448 NETDEV_LAG_HASH_E23
,
2449 NETDEV_LAG_HASH_E34
,
2450 NETDEV_LAG_HASH_UNKNOWN
,
2453 struct netdev_lag_upper_info
{
2454 enum netdev_lag_tx_type tx_type
;
2455 enum netdev_lag_hash hash_type
;
2458 struct netdev_lag_lower_state_info
{
2463 #include <linux/notifier.h>
2465 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2466 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2470 NETDEV_UP
= 1, /* For now you can't veto a device up/down */
2472 NETDEV_REBOOT
, /* Tell a protocol stack a network interface
2473 detected a hardware crash and restarted
2474 - we can use this eg to kick tcp sessions
2476 NETDEV_CHANGE
, /* Notify device state change */
2479 NETDEV_CHANGEMTU
, /* notify after mtu change happened */
2480 NETDEV_CHANGEADDR
, /* notify after the address change */
2481 NETDEV_PRE_CHANGEADDR
, /* notify before the address change */
2485 NETDEV_BONDING_FAILOVER
,
2487 NETDEV_PRE_TYPE_CHANGE
,
2488 NETDEV_POST_TYPE_CHANGE
,
2491 NETDEV_NOTIFY_PEERS
,
2495 NETDEV_PRECHANGEMTU
, /* notify before mtu change happened */
2496 NETDEV_CHANGEINFODATA
,
2497 NETDEV_BONDING_INFO
,
2498 NETDEV_PRECHANGEUPPER
,
2499 NETDEV_CHANGELOWERSTATE
,
2500 NETDEV_UDP_TUNNEL_PUSH_INFO
,
2501 NETDEV_UDP_TUNNEL_DROP_INFO
,
2502 NETDEV_CHANGE_TX_QUEUE_LEN
,
2503 NETDEV_CVLAN_FILTER_PUSH_INFO
,
2504 NETDEV_CVLAN_FILTER_DROP_INFO
,
2505 NETDEV_SVLAN_FILTER_PUSH_INFO
,
2506 NETDEV_SVLAN_FILTER_DROP_INFO
,
2508 const char *netdev_cmd_to_name(enum netdev_cmd cmd
);
2510 int register_netdevice_notifier(struct notifier_block
*nb
);
2511 int unregister_netdevice_notifier(struct notifier_block
*nb
);
2512 int register_netdevice_notifier_net(struct net
*net
, struct notifier_block
*nb
);
2513 int unregister_netdevice_notifier_net(struct net
*net
,
2514 struct notifier_block
*nb
);
2516 struct netdev_notifier_info
{
2517 struct net_device
*dev
;
2518 struct netlink_ext_ack
*extack
;
2521 struct netdev_notifier_info_ext
{
2522 struct netdev_notifier_info info
; /* must be first */
2528 struct netdev_notifier_change_info
{
2529 struct netdev_notifier_info info
; /* must be first */
2530 unsigned int flags_changed
;
2533 struct netdev_notifier_changeupper_info
{
2534 struct netdev_notifier_info info
; /* must be first */
2535 struct net_device
*upper_dev
; /* new upper dev */
2536 bool master
; /* is upper dev master */
2537 bool linking
; /* is the notification for link or unlink */
2538 void *upper_info
; /* upper dev info */
2541 struct netdev_notifier_changelowerstate_info
{
2542 struct netdev_notifier_info info
; /* must be first */
2543 void *lower_state_info
; /* is lower dev state */
2546 struct netdev_notifier_pre_changeaddr_info
{
2547 struct netdev_notifier_info info
; /* must be first */
2548 const unsigned char *dev_addr
;
2551 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
2552 struct net_device
*dev
)
2555 info
->extack
= NULL
;
2558 static inline struct net_device
*
2559 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
2564 static inline struct netlink_ext_ack
*
2565 netdev_notifier_info_to_extack(const struct netdev_notifier_info
*info
)
2567 return info
->extack
;
2570 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
2573 extern rwlock_t dev_base_lock
; /* Device list lock */
2575 #define for_each_netdev(net, d) \
2576 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2577 #define for_each_netdev_reverse(net, d) \
2578 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2579 #define for_each_netdev_rcu(net, d) \
2580 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2581 #define for_each_netdev_safe(net, d, n) \
2582 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2583 #define for_each_netdev_continue(net, d) \
2584 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2585 #define for_each_netdev_continue_reverse(net, d) \
2586 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2588 #define for_each_netdev_continue_rcu(net, d) \
2589 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2590 #define for_each_netdev_in_bond_rcu(bond, slave) \
2591 for_each_netdev_rcu(&init_net, slave) \
2592 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2593 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2595 static inline struct net_device
*next_net_device(struct net_device
*dev
)
2597 struct list_head
*lh
;
2601 lh
= dev
->dev_list
.next
;
2602 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2605 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
2607 struct list_head
*lh
;
2611 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
2612 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2615 static inline struct net_device
*first_net_device(struct net
*net
)
2617 return list_empty(&net
->dev_base_head
) ? NULL
:
2618 net_device_entry(net
->dev_base_head
.next
);
2621 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
2623 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
2625 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2628 int netdev_boot_setup_check(struct net_device
*dev
);
2629 unsigned long netdev_boot_base(const char *prefix
, int unit
);
2630 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
2631 const char *hwaddr
);
2632 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2633 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2634 void dev_add_pack(struct packet_type
*pt
);
2635 void dev_remove_pack(struct packet_type
*pt
);
2636 void __dev_remove_pack(struct packet_type
*pt
);
2637 void dev_add_offload(struct packet_offload
*po
);
2638 void dev_remove_offload(struct packet_offload
*po
);
2640 int dev_get_iflink(const struct net_device
*dev
);
2641 int dev_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
);
2642 struct net_device
*__dev_get_by_flags(struct net
*net
, unsigned short flags
,
2643 unsigned short mask
);
2644 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
2645 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
2646 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
2647 int dev_alloc_name(struct net_device
*dev
, const char *name
);
2648 int dev_open(struct net_device
*dev
, struct netlink_ext_ack
*extack
);
2649 void dev_close(struct net_device
*dev
);
2650 void dev_close_many(struct list_head
*head
, bool unlink
);
2651 void dev_disable_lro(struct net_device
*dev
);
2652 int dev_loopback_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*newskb
);
2653 u16
dev_pick_tx_zero(struct net_device
*dev
, struct sk_buff
*skb
,
2654 struct net_device
*sb_dev
);
2655 u16
dev_pick_tx_cpu_id(struct net_device
*dev
, struct sk_buff
*skb
,
2656 struct net_device
*sb_dev
);
2657 int dev_queue_xmit(struct sk_buff
*skb
);
2658 int dev_queue_xmit_accel(struct sk_buff
*skb
, struct net_device
*sb_dev
);
2659 int dev_direct_xmit(struct sk_buff
*skb
, u16 queue_id
);
2660 int register_netdevice(struct net_device
*dev
);
2661 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
2662 void unregister_netdevice_many(struct list_head
*head
);
2663 static inline void unregister_netdevice(struct net_device
*dev
)
2665 unregister_netdevice_queue(dev
, NULL
);
2668 int netdev_refcnt_read(const struct net_device
*dev
);
2669 void free_netdev(struct net_device
*dev
);
2670 void netdev_freemem(struct net_device
*dev
);
2671 void synchronize_net(void);
2672 int init_dummy_netdev(struct net_device
*dev
);
2674 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
2675 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
2676 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
2677 struct net_device
*dev_get_by_napi_id(unsigned int napi_id
);
2678 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
2679 int dev_restart(struct net_device
*dev
);
2680 int skb_gro_receive(struct sk_buff
*p
, struct sk_buff
*skb
);
2682 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
2684 return NAPI_GRO_CB(skb
)->data_offset
;
2687 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
2689 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
2692 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
2694 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2697 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2698 unsigned int offset
)
2700 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2703 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2705 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2708 static inline void skb_gro_frag0_invalidate(struct sk_buff
*skb
)
2710 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2711 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2714 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2715 unsigned int offset
)
2717 if (!pskb_may_pull(skb
, hlen
))
2720 skb_gro_frag0_invalidate(skb
);
2721 return skb
->data
+ offset
;
2724 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2726 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2727 skb_network_offset(skb
);
2730 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2731 const void *start
, unsigned int len
)
2733 if (NAPI_GRO_CB(skb
)->csum_valid
)
2734 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2735 csum_partial(start
, len
, 0));
2738 /* GRO checksum functions. These are logical equivalents of the normal
2739 * checksum functions (in skbuff.h) except that they operate on the GRO
2740 * offsets and fields in sk_buff.
2743 __sum16
__skb_gro_checksum_complete(struct sk_buff
*skb
);
2745 static inline bool skb_at_gro_remcsum_start(struct sk_buff
*skb
)
2747 return (NAPI_GRO_CB(skb
)->gro_remcsum_start
== skb_gro_offset(skb
));
2750 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff
*skb
,
2754 return ((skb
->ip_summed
!= CHECKSUM_PARTIAL
||
2755 skb_checksum_start_offset(skb
) <
2756 skb_gro_offset(skb
)) &&
2757 !skb_at_gro_remcsum_start(skb
) &&
2758 NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2759 (!zero_okay
|| check
));
2762 static inline __sum16
__skb_gro_checksum_validate_complete(struct sk_buff
*skb
,
2765 if (NAPI_GRO_CB(skb
)->csum_valid
&&
2766 !csum_fold(csum_add(psum
, NAPI_GRO_CB(skb
)->csum
)))
2769 NAPI_GRO_CB(skb
)->csum
= psum
;
2771 return __skb_gro_checksum_complete(skb
);
2774 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff
*skb
)
2776 if (NAPI_GRO_CB(skb
)->csum_cnt
> 0) {
2777 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2778 NAPI_GRO_CB(skb
)->csum_cnt
--;
2780 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2781 * verified a new top level checksum or an encapsulated one
2782 * during GRO. This saves work if we fallback to normal path.
2784 __skb_incr_checksum_unnecessary(skb
);
2788 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2791 __sum16 __ret = 0; \
2792 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2793 __ret = __skb_gro_checksum_validate_complete(skb, \
2794 compute_pseudo(skb, proto)); \
2796 skb_gro_incr_csum_unnecessary(skb); \
2800 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2801 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2803 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2805 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2807 #define skb_gro_checksum_simple_validate(skb) \
2808 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2810 static inline bool __skb_gro_checksum_convert_check(struct sk_buff
*skb
)
2812 return (NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2813 !NAPI_GRO_CB(skb
)->csum_valid
);
2816 static inline void __skb_gro_checksum_convert(struct sk_buff
*skb
,
2817 __sum16 check
, __wsum pseudo
)
2819 NAPI_GRO_CB(skb
)->csum
= ~pseudo
;
2820 NAPI_GRO_CB(skb
)->csum_valid
= 1;
2823 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2825 if (__skb_gro_checksum_convert_check(skb)) \
2826 __skb_gro_checksum_convert(skb, check, \
2827 compute_pseudo(skb, proto)); \
2830 struct gro_remcsum
{
2835 static inline void skb_gro_remcsum_init(struct gro_remcsum
*grc
)
2841 static inline void *skb_gro_remcsum_process(struct sk_buff
*skb
, void *ptr
,
2842 unsigned int off
, size_t hdrlen
,
2843 int start
, int offset
,
2844 struct gro_remcsum
*grc
,
2848 size_t plen
= hdrlen
+ max_t(size_t, offset
+ sizeof(u16
), start
);
2850 BUG_ON(!NAPI_GRO_CB(skb
)->csum_valid
);
2853 NAPI_GRO_CB(skb
)->gro_remcsum_start
= off
+ hdrlen
+ start
;
2857 ptr
= skb_gro_header_fast(skb
, off
);
2858 if (skb_gro_header_hard(skb
, off
+ plen
)) {
2859 ptr
= skb_gro_header_slow(skb
, off
+ plen
, off
);
2864 delta
= remcsum_adjust(ptr
+ hdrlen
, NAPI_GRO_CB(skb
)->csum
,
2867 /* Adjust skb->csum since we changed the packet */
2868 NAPI_GRO_CB(skb
)->csum
= csum_add(NAPI_GRO_CB(skb
)->csum
, delta
);
2870 grc
->offset
= off
+ hdrlen
+ offset
;
2876 static inline void skb_gro_remcsum_cleanup(struct sk_buff
*skb
,
2877 struct gro_remcsum
*grc
)
2880 size_t plen
= grc
->offset
+ sizeof(u16
);
2885 ptr
= skb_gro_header_fast(skb
, grc
->offset
);
2886 if (skb_gro_header_hard(skb
, grc
->offset
+ sizeof(u16
))) {
2887 ptr
= skb_gro_header_slow(skb
, plen
, grc
->offset
);
2892 remcsum_unadjust((__sum16
*)ptr
, grc
->delta
);
2895 #ifdef CONFIG_XFRM_OFFLOAD
2896 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
*pp
, int flush
)
2898 if (PTR_ERR(pp
) != -EINPROGRESS
)
2899 NAPI_GRO_CB(skb
)->flush
|= flush
;
2901 static inline void skb_gro_flush_final_remcsum(struct sk_buff
*skb
,
2904 struct gro_remcsum
*grc
)
2906 if (PTR_ERR(pp
) != -EINPROGRESS
) {
2907 NAPI_GRO_CB(skb
)->flush
|= flush
;
2908 skb_gro_remcsum_cleanup(skb
, grc
);
2909 skb
->remcsum_offload
= 0;
2913 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
*pp
, int flush
)
2915 NAPI_GRO_CB(skb
)->flush
|= flush
;
2917 static inline void skb_gro_flush_final_remcsum(struct sk_buff
*skb
,
2920 struct gro_remcsum
*grc
)
2922 NAPI_GRO_CB(skb
)->flush
|= flush
;
2923 skb_gro_remcsum_cleanup(skb
, grc
);
2924 skb
->remcsum_offload
= 0;
2928 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2929 unsigned short type
,
2930 const void *daddr
, const void *saddr
,
2933 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2936 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2939 static inline int dev_parse_header(const struct sk_buff
*skb
,
2940 unsigned char *haddr
)
2942 const struct net_device
*dev
= skb
->dev
;
2944 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2946 return dev
->header_ops
->parse(skb
, haddr
);
2949 static inline __be16
dev_parse_header_protocol(const struct sk_buff
*skb
)
2951 const struct net_device
*dev
= skb
->dev
;
2953 if (!dev
->header_ops
|| !dev
->header_ops
->parse_protocol
)
2955 return dev
->header_ops
->parse_protocol(skb
);
2958 /* ll_header must have at least hard_header_len allocated */
2959 static inline bool dev_validate_header(const struct net_device
*dev
,
2960 char *ll_header
, int len
)
2962 if (likely(len
>= dev
->hard_header_len
))
2964 if (len
< dev
->min_header_len
)
2967 if (capable(CAP_SYS_RAWIO
)) {
2968 memset(ll_header
+ len
, 0, dev
->hard_header_len
- len
);
2972 if (dev
->header_ops
&& dev
->header_ops
->validate
)
2973 return dev
->header_ops
->validate(ll_header
, len
);
2978 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
,
2980 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2981 static inline int unregister_gifconf(unsigned int family
)
2983 return register_gifconf(family
, NULL
);
2986 #ifdef CONFIG_NET_FLOW_LIMIT
2987 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2988 struct sd_flow_limit
{
2990 unsigned int num_buckets
;
2991 unsigned int history_head
;
2992 u16 history
[FLOW_LIMIT_HISTORY
];
2996 extern int netdev_flow_limit_table_len
;
2997 #endif /* CONFIG_NET_FLOW_LIMIT */
3000 * Incoming packets are placed on per-CPU queues
3002 struct softnet_data
{
3003 struct list_head poll_list
;
3004 struct sk_buff_head process_queue
;
3007 unsigned int processed
;
3008 unsigned int time_squeeze
;
3009 unsigned int received_rps
;
3011 struct softnet_data
*rps_ipi_list
;
3013 #ifdef CONFIG_NET_FLOW_LIMIT
3014 struct sd_flow_limit __rcu
*flow_limit
;
3016 struct Qdisc
*output_queue
;
3017 struct Qdisc
**output_queue_tailp
;
3018 struct sk_buff
*completion_queue
;
3019 #ifdef CONFIG_XFRM_OFFLOAD
3020 struct sk_buff_head xfrm_backlog
;
3022 /* written and read only by owning cpu: */
3028 /* input_queue_head should be written by cpu owning this struct,
3029 * and only read by other cpus. Worth using a cache line.
3031 unsigned int input_queue_head ____cacheline_aligned_in_smp
;
3033 /* Elements below can be accessed between CPUs for RPS/RFS */
3034 call_single_data_t csd ____cacheline_aligned_in_smp
;
3035 struct softnet_data
*rps_ipi_next
;
3037 unsigned int input_queue_tail
;
3039 unsigned int dropped
;
3040 struct sk_buff_head input_pkt_queue
;
3041 struct napi_struct backlog
;
3045 static inline void input_queue_head_incr(struct softnet_data
*sd
)
3048 sd
->input_queue_head
++;
3052 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
3053 unsigned int *qtail
)
3056 *qtail
= ++sd
->input_queue_tail
;
3060 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
3062 static inline int dev_recursion_level(void)
3064 return this_cpu_read(softnet_data
.xmit
.recursion
);
3067 #define XMIT_RECURSION_LIMIT 10
3068 static inline bool dev_xmit_recursion(void)
3070 return unlikely(__this_cpu_read(softnet_data
.xmit
.recursion
) >
3071 XMIT_RECURSION_LIMIT
);
3074 static inline void dev_xmit_recursion_inc(void)
3076 __this_cpu_inc(softnet_data
.xmit
.recursion
);
3079 static inline void dev_xmit_recursion_dec(void)
3081 __this_cpu_dec(softnet_data
.xmit
.recursion
);
3084 void __netif_schedule(struct Qdisc
*q
);
3085 void netif_schedule_queue(struct netdev_queue
*txq
);
3087 static inline void netif_tx_schedule_all(struct net_device
*dev
)
3091 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
3092 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
3095 static __always_inline
void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
3097 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
3101 * netif_start_queue - allow transmit
3102 * @dev: network device
3104 * Allow upper layers to call the device hard_start_xmit routine.
3106 static inline void netif_start_queue(struct net_device
*dev
)
3108 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
3111 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
3115 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3116 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3117 netif_tx_start_queue(txq
);
3121 void netif_tx_wake_queue(struct netdev_queue
*dev_queue
);
3124 * netif_wake_queue - restart transmit
3125 * @dev: network device
3127 * Allow upper layers to call the device hard_start_xmit routine.
3128 * Used for flow control when transmit resources are available.
3130 static inline void netif_wake_queue(struct net_device
*dev
)
3132 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
3135 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
3139 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3140 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3141 netif_tx_wake_queue(txq
);
3145 static __always_inline
void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
3147 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
3151 * netif_stop_queue - stop transmitted packets
3152 * @dev: network device
3154 * Stop upper layers calling the device hard_start_xmit routine.
3155 * Used for flow control when transmit resources are unavailable.
3157 static inline void netif_stop_queue(struct net_device
*dev
)
3159 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
3162 void netif_tx_stop_all_queues(struct net_device
*dev
);
3163 void netdev_update_lockdep_key(struct net_device
*dev
);
3165 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
3167 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
3171 * netif_queue_stopped - test if transmit queue is flowblocked
3172 * @dev: network device
3174 * Test if transmit queue on device is currently unable to send.
3176 static inline bool netif_queue_stopped(const struct net_device
*dev
)
3178 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
3181 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
3183 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
3187 netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
3189 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
3193 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue
*dev_queue
)
3195 return dev_queue
->state
& QUEUE_STATE_DRV_XOFF_OR_FROZEN
;
3199 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3200 * @dev_queue: pointer to transmit queue
3202 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3203 * to give appropriate hint to the CPU.
3205 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue
*dev_queue
)
3208 prefetchw(&dev_queue
->dql
.num_queued
);
3213 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3214 * @dev_queue: pointer to transmit queue
3216 * BQL enabled drivers might use this helper in their TX completion path,
3217 * to give appropriate hint to the CPU.
3219 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue
*dev_queue
)
3222 prefetchw(&dev_queue
->dql
.limit
);
3226 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
3230 dql_queued(&dev_queue
->dql
, bytes
);
3232 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
3235 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
3238 * The XOFF flag must be set before checking the dql_avail below,
3239 * because in netdev_tx_completed_queue we update the dql_completed
3240 * before checking the XOFF flag.
3244 /* check again in case another CPU has just made room avail */
3245 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
3246 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
3250 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3251 * that they should not test BQL status themselves.
3252 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3254 * Returns true if the doorbell must be used to kick the NIC.
3256 static inline bool __netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
3262 dql_queued(&dev_queue
->dql
, bytes
);
3264 return netif_tx_queue_stopped(dev_queue
);
3266 netdev_tx_sent_queue(dev_queue
, bytes
);
3271 * netdev_sent_queue - report the number of bytes queued to hardware
3272 * @dev: network device
3273 * @bytes: number of bytes queued to the hardware device queue
3275 * Report the number of bytes queued for sending/completion to the network
3276 * device hardware queue. @bytes should be a good approximation and should
3277 * exactly match netdev_completed_queue() @bytes
3279 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
3281 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
3284 static inline bool __netdev_sent_queue(struct net_device
*dev
,
3288 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
,
3292 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
3293 unsigned int pkts
, unsigned int bytes
)
3296 if (unlikely(!bytes
))
3299 dql_completed(&dev_queue
->dql
, bytes
);
3302 * Without the memory barrier there is a small possiblity that
3303 * netdev_tx_sent_queue will miss the update and cause the queue to
3304 * be stopped forever
3308 if (unlikely(dql_avail(&dev_queue
->dql
) < 0))
3311 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
3312 netif_schedule_queue(dev_queue
);
3317 * netdev_completed_queue - report bytes and packets completed by device
3318 * @dev: network device
3319 * @pkts: actual number of packets sent over the medium
3320 * @bytes: actual number of bytes sent over the medium
3322 * Report the number of bytes and packets transmitted by the network device
3323 * hardware queue over the physical medium, @bytes must exactly match the
3324 * @bytes amount passed to netdev_sent_queue()
3326 static inline void netdev_completed_queue(struct net_device
*dev
,
3327 unsigned int pkts
, unsigned int bytes
)
3329 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
3332 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
3335 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
3341 * netdev_reset_queue - reset the packets and bytes count of a network device
3342 * @dev_queue: network device
3344 * Reset the bytes and packet count of a network device and clear the
3345 * software flow control OFF bit for this network device
3347 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
3349 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
3353 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3354 * @dev: network device
3355 * @queue_index: given tx queue index
3357 * Returns 0 if given tx queue index >= number of device tx queues,
3358 * otherwise returns the originally passed tx queue index.
3360 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
3362 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
3363 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3364 dev
->name
, queue_index
,
3365 dev
->real_num_tx_queues
);
3373 * netif_running - test if up
3374 * @dev: network device
3376 * Test if the device has been brought up.
3378 static inline bool netif_running(const struct net_device
*dev
)
3380 return test_bit(__LINK_STATE_START
, &dev
->state
);
3384 * Routines to manage the subqueues on a device. We only need start,
3385 * stop, and a check if it's stopped. All other device management is
3386 * done at the overall netdevice level.
3387 * Also test the device if we're multiqueue.
3391 * netif_start_subqueue - allow sending packets on subqueue
3392 * @dev: network device
3393 * @queue_index: sub queue index
3395 * Start individual transmit queue of a device with multiple transmit queues.
3397 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
3399 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3401 netif_tx_start_queue(txq
);
3405 * netif_stop_subqueue - stop sending packets on subqueue
3406 * @dev: network device
3407 * @queue_index: sub queue index
3409 * Stop individual transmit queue of a device with multiple transmit queues.
3411 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
3413 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3414 netif_tx_stop_queue(txq
);
3418 * netif_subqueue_stopped - test status of subqueue
3419 * @dev: network device
3420 * @queue_index: sub queue index
3422 * Check individual transmit queue of a device with multiple transmit queues.
3424 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
3427 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3429 return netif_tx_queue_stopped(txq
);
3432 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
3433 struct sk_buff
*skb
)
3435 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
3439 * netif_wake_subqueue - allow sending packets on subqueue
3440 * @dev: network device
3441 * @queue_index: sub queue index
3443 * Resume individual transmit queue of a device with multiple transmit queues.
3445 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
3447 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3449 netif_tx_wake_queue(txq
);
3453 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
3455 int __netif_set_xps_queue(struct net_device
*dev
, const unsigned long *mask
,
3456 u16 index
, bool is_rxqs_map
);
3459 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3460 * @j: CPU/Rx queue index
3461 * @mask: bitmask of all cpus/rx queues
3462 * @nr_bits: number of bits in the bitmask
3464 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3466 static inline bool netif_attr_test_mask(unsigned long j
,
3467 const unsigned long *mask
,
3468 unsigned int nr_bits
)
3470 cpu_max_bits_warn(j
, nr_bits
);
3471 return test_bit(j
, mask
);
3475 * netif_attr_test_online - Test for online CPU/Rx queue
3476 * @j: CPU/Rx queue index
3477 * @online_mask: bitmask for CPUs/Rx queues that are online
3478 * @nr_bits: number of bits in the bitmask
3480 * Returns true if a CPU/Rx queue is online.
3482 static inline bool netif_attr_test_online(unsigned long j
,
3483 const unsigned long *online_mask
,
3484 unsigned int nr_bits
)
3486 cpu_max_bits_warn(j
, nr_bits
);
3489 return test_bit(j
, online_mask
);
3491 return (j
< nr_bits
);
3495 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3496 * @n: CPU/Rx queue index
3497 * @srcp: the cpumask/Rx queue mask pointer
3498 * @nr_bits: number of bits in the bitmask
3500 * Returns >= nr_bits if no further CPUs/Rx queues set.
3502 static inline unsigned int netif_attrmask_next(int n
, const unsigned long *srcp
,
3503 unsigned int nr_bits
)
3505 /* -1 is a legal arg here. */
3507 cpu_max_bits_warn(n
, nr_bits
);
3510 return find_next_bit(srcp
, nr_bits
, n
+ 1);
3516 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3517 * @n: CPU/Rx queue index
3518 * @src1p: the first CPUs/Rx queues mask pointer
3519 * @src2p: the second CPUs/Rx queues mask pointer
3520 * @nr_bits: number of bits in the bitmask
3522 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3524 static inline int netif_attrmask_next_and(int n
, const unsigned long *src1p
,
3525 const unsigned long *src2p
,
3526 unsigned int nr_bits
)
3528 /* -1 is a legal arg here. */
3530 cpu_max_bits_warn(n
, nr_bits
);
3533 return find_next_and_bit(src1p
, src2p
, nr_bits
, n
+ 1);
3535 return find_next_bit(src1p
, nr_bits
, n
+ 1);
3537 return find_next_bit(src2p
, nr_bits
, n
+ 1);
3542 static inline int netif_set_xps_queue(struct net_device
*dev
,
3543 const struct cpumask
*mask
,
3549 static inline int __netif_set_xps_queue(struct net_device
*dev
,
3550 const unsigned long *mask
,
3551 u16 index
, bool is_rxqs_map
)
3558 * netif_is_multiqueue - test if device has multiple transmit queues
3559 * @dev: network device
3561 * Check if device has multiple transmit queues
3563 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
3565 return dev
->num_tx_queues
> 1;
3568 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
3571 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
3573 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
3576 dev
->real_num_rx_queues
= rxqs
;
3581 static inline struct netdev_rx_queue
*
3582 __netif_get_rx_queue(struct net_device
*dev
, unsigned int rxq
)
3584 return dev
->_rx
+ rxq
;
3588 static inline unsigned int get_netdev_rx_queue_index(
3589 struct netdev_rx_queue
*queue
)
3591 struct net_device
*dev
= queue
->dev
;
3592 int index
= queue
- dev
->_rx
;
3594 BUG_ON(index
>= dev
->num_rx_queues
);
3599 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3600 int netif_get_num_default_rss_queues(void);
3602 enum skb_free_reason
{
3603 SKB_REASON_CONSUMED
,
3607 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
3608 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
3611 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3612 * interrupt context or with hardware interrupts being disabled.
3613 * (in_irq() || irqs_disabled())
3615 * We provide four helpers that can be used in following contexts :
3617 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3618 * replacing kfree_skb(skb)
3620 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3621 * Typically used in place of consume_skb(skb) in TX completion path
3623 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3624 * replacing kfree_skb(skb)
3626 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3627 * and consumed a packet. Used in place of consume_skb(skb)
3629 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
3631 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
3634 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
3636 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
3639 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
3641 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
3644 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
3646 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
3649 void generic_xdp_tx(struct sk_buff
*skb
, struct bpf_prog
*xdp_prog
);
3650 int do_xdp_generic(struct bpf_prog
*xdp_prog
, struct sk_buff
*skb
);
3651 int netif_rx(struct sk_buff
*skb
);
3652 int netif_rx_ni(struct sk_buff
*skb
);
3653 int netif_receive_skb(struct sk_buff
*skb
);
3654 int netif_receive_skb_core(struct sk_buff
*skb
);
3655 void netif_receive_skb_list(struct list_head
*head
);
3656 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
3657 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
3658 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
3659 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
3660 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
3661 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
3663 static inline void napi_free_frags(struct napi_struct
*napi
)
3665 kfree_skb(napi
->skb
);
3669 bool netdev_is_rx_handler_busy(struct net_device
*dev
);
3670 int netdev_rx_handler_register(struct net_device
*dev
,
3671 rx_handler_func_t
*rx_handler
,
3672 void *rx_handler_data
);
3673 void netdev_rx_handler_unregister(struct net_device
*dev
);
3675 bool dev_valid_name(const char *name
);
3676 int dev_ioctl(struct net
*net
, unsigned int cmd
, struct ifreq
*ifr
,
3677 bool *need_copyout
);
3678 int dev_ifconf(struct net
*net
, struct ifconf
*, int);
3679 int dev_ethtool(struct net
*net
, struct ifreq
*);
3680 unsigned int dev_get_flags(const struct net_device
*);
3681 int __dev_change_flags(struct net_device
*dev
, unsigned int flags
,
3682 struct netlink_ext_ack
*extack
);
3683 int dev_change_flags(struct net_device
*dev
, unsigned int flags
,
3684 struct netlink_ext_ack
*extack
);
3685 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
3686 unsigned int gchanges
);
3687 int dev_change_name(struct net_device
*, const char *);
3688 int dev_set_alias(struct net_device
*, const char *, size_t);
3689 int dev_get_alias(const struct net_device
*, char *, size_t);
3690 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
3691 int __dev_set_mtu(struct net_device
*, int);
3692 int dev_set_mtu_ext(struct net_device
*dev
, int mtu
,
3693 struct netlink_ext_ack
*extack
);
3694 int dev_set_mtu(struct net_device
*, int);
3695 int dev_change_tx_queue_len(struct net_device
*, unsigned long);
3696 void dev_set_group(struct net_device
*, int);
3697 int dev_pre_changeaddr_notify(struct net_device
*dev
, const char *addr
,
3698 struct netlink_ext_ack
*extack
);
3699 int dev_set_mac_address(struct net_device
*dev
, struct sockaddr
*sa
,
3700 struct netlink_ext_ack
*extack
);
3701 int dev_change_carrier(struct net_device
*, bool new_carrier
);
3702 int dev_get_phys_port_id(struct net_device
*dev
,
3703 struct netdev_phys_item_id
*ppid
);
3704 int dev_get_phys_port_name(struct net_device
*dev
,
3705 char *name
, size_t len
);
3706 int dev_get_port_parent_id(struct net_device
*dev
,
3707 struct netdev_phys_item_id
*ppid
, bool recurse
);
3708 bool netdev_port_same_parent_id(struct net_device
*a
, struct net_device
*b
);
3709 int dev_change_proto_down(struct net_device
*dev
, bool proto_down
);
3710 int dev_change_proto_down_generic(struct net_device
*dev
, bool proto_down
);
3711 struct sk_buff
*validate_xmit_skb_list(struct sk_buff
*skb
, struct net_device
*dev
, bool *again
);
3712 struct sk_buff
*dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
3713 struct netdev_queue
*txq
, int *ret
);
3715 typedef int (*bpf_op_t
)(struct net_device
*dev
, struct netdev_bpf
*bpf
);
3716 int dev_change_xdp_fd(struct net_device
*dev
, struct netlink_ext_ack
*extack
,
3718 u32
__dev_xdp_query(struct net_device
*dev
, bpf_op_t xdp_op
,
3719 enum bpf_netdev_command cmd
);
3720 int xdp_umem_query(struct net_device
*dev
, u16 queue_id
);
3722 int __dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3723 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3724 bool is_skb_forwardable(const struct net_device
*dev
,
3725 const struct sk_buff
*skb
);
3727 static __always_inline
int ____dev_forward_skb(struct net_device
*dev
,
3728 struct sk_buff
*skb
)
3730 if (skb_orphan_frags(skb
, GFP_ATOMIC
) ||
3731 unlikely(!is_skb_forwardable(dev
, skb
))) {
3732 atomic_long_inc(&dev
->rx_dropped
);
3737 skb_scrub_packet(skb
, true);
3742 bool dev_nit_active(struct net_device
*dev
);
3743 void dev_queue_xmit_nit(struct sk_buff
*skb
, struct net_device
*dev
);
3745 extern int netdev_budget
;
3746 extern unsigned int netdev_budget_usecs
;
3748 /* Called by rtnetlink.c:rtnl_unlock() */
3749 void netdev_run_todo(void);
3752 * dev_put - release reference to device
3753 * @dev: network device
3755 * Release reference to device to allow it to be freed.
3757 static inline void dev_put(struct net_device
*dev
)
3759 this_cpu_dec(*dev
->pcpu_refcnt
);
3763 * dev_hold - get reference to device
3764 * @dev: network device
3766 * Hold reference to device to keep it from being freed.
3768 static inline void dev_hold(struct net_device
*dev
)
3770 this_cpu_inc(*dev
->pcpu_refcnt
);
3773 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3774 * and _off may be called from IRQ context, but it is caller
3775 * who is responsible for serialization of these calls.
3777 * The name carrier is inappropriate, these functions should really be
3778 * called netif_lowerlayer_*() because they represent the state of any
3779 * kind of lower layer not just hardware media.
3782 void linkwatch_init_dev(struct net_device
*dev
);
3783 void linkwatch_fire_event(struct net_device
*dev
);
3784 void linkwatch_forget_dev(struct net_device
*dev
);
3787 * netif_carrier_ok - test if carrier present
3788 * @dev: network device
3790 * Check if carrier is present on device
3792 static inline bool netif_carrier_ok(const struct net_device
*dev
)
3794 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
3797 unsigned long dev_trans_start(struct net_device
*dev
);
3799 void __netdev_watchdog_up(struct net_device
*dev
);
3801 void netif_carrier_on(struct net_device
*dev
);
3803 void netif_carrier_off(struct net_device
*dev
);
3806 * netif_dormant_on - mark device as dormant.
3807 * @dev: network device
3809 * Mark device as dormant (as per RFC2863).
3811 * The dormant state indicates that the relevant interface is not
3812 * actually in a condition to pass packets (i.e., it is not 'up') but is
3813 * in a "pending" state, waiting for some external event. For "on-
3814 * demand" interfaces, this new state identifies the situation where the
3815 * interface is waiting for events to place it in the up state.
3817 static inline void netif_dormant_on(struct net_device
*dev
)
3819 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3820 linkwatch_fire_event(dev
);
3824 * netif_dormant_off - set device as not dormant.
3825 * @dev: network device
3827 * Device is not in dormant state.
3829 static inline void netif_dormant_off(struct net_device
*dev
)
3831 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3832 linkwatch_fire_event(dev
);
3836 * netif_dormant - test if device is dormant
3837 * @dev: network device
3839 * Check if device is dormant.
3841 static inline bool netif_dormant(const struct net_device
*dev
)
3843 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
3848 * netif_oper_up - test if device is operational
3849 * @dev: network device
3851 * Check if carrier is operational
3853 static inline bool netif_oper_up(const struct net_device
*dev
)
3855 return (dev
->operstate
== IF_OPER_UP
||
3856 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
3860 * netif_device_present - is device available or removed
3861 * @dev: network device
3863 * Check if device has not been removed from system.
3865 static inline bool netif_device_present(struct net_device
*dev
)
3867 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
3870 void netif_device_detach(struct net_device
*dev
);
3872 void netif_device_attach(struct net_device
*dev
);
3875 * Network interface message level settings
3879 NETIF_MSG_DRV
= 0x0001,
3880 NETIF_MSG_PROBE
= 0x0002,
3881 NETIF_MSG_LINK
= 0x0004,
3882 NETIF_MSG_TIMER
= 0x0008,
3883 NETIF_MSG_IFDOWN
= 0x0010,
3884 NETIF_MSG_IFUP
= 0x0020,
3885 NETIF_MSG_RX_ERR
= 0x0040,
3886 NETIF_MSG_TX_ERR
= 0x0080,
3887 NETIF_MSG_TX_QUEUED
= 0x0100,
3888 NETIF_MSG_INTR
= 0x0200,
3889 NETIF_MSG_TX_DONE
= 0x0400,
3890 NETIF_MSG_RX_STATUS
= 0x0800,
3891 NETIF_MSG_PKTDATA
= 0x1000,
3892 NETIF_MSG_HW
= 0x2000,
3893 NETIF_MSG_WOL
= 0x4000,
3896 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3897 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3898 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3899 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3900 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3901 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3902 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3903 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3904 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3905 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3906 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3907 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3908 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3909 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3910 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3912 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
3915 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
3916 return default_msg_enable_bits
;
3917 if (debug_value
== 0) /* no output */
3919 /* set low N bits */
3920 return (1U << debug_value
) - 1;
3923 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
3925 spin_lock(&txq
->_xmit_lock
);
3926 txq
->xmit_lock_owner
= cpu
;
3929 static inline bool __netif_tx_acquire(struct netdev_queue
*txq
)
3931 __acquire(&txq
->_xmit_lock
);
3935 static inline void __netif_tx_release(struct netdev_queue
*txq
)
3937 __release(&txq
->_xmit_lock
);
3940 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
3942 spin_lock_bh(&txq
->_xmit_lock
);
3943 txq
->xmit_lock_owner
= smp_processor_id();
3946 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
3948 bool ok
= spin_trylock(&txq
->_xmit_lock
);
3950 txq
->xmit_lock_owner
= smp_processor_id();
3954 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
3956 txq
->xmit_lock_owner
= -1;
3957 spin_unlock(&txq
->_xmit_lock
);
3960 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
3962 txq
->xmit_lock_owner
= -1;
3963 spin_unlock_bh(&txq
->_xmit_lock
);
3966 static inline void txq_trans_update(struct netdev_queue
*txq
)
3968 if (txq
->xmit_lock_owner
!= -1)
3969 txq
->trans_start
= jiffies
;
3972 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3973 static inline void netif_trans_update(struct net_device
*dev
)
3975 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, 0);
3977 if (txq
->trans_start
!= jiffies
)
3978 txq
->trans_start
= jiffies
;
3982 * netif_tx_lock - grab network device transmit lock
3983 * @dev: network device
3985 * Get network device transmit lock
3987 static inline void netif_tx_lock(struct net_device
*dev
)
3992 spin_lock(&dev
->tx_global_lock
);
3993 cpu
= smp_processor_id();
3994 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3995 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3997 /* We are the only thread of execution doing a
3998 * freeze, but we have to grab the _xmit_lock in
3999 * order to synchronize with threads which are in
4000 * the ->hard_start_xmit() handler and already
4001 * checked the frozen bit.
4003 __netif_tx_lock(txq
, cpu
);
4004 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
4005 __netif_tx_unlock(txq
);
4009 static inline void netif_tx_lock_bh(struct net_device
*dev
)
4015 static inline void netif_tx_unlock(struct net_device
*dev
)
4019 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
4020 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
4022 /* No need to grab the _xmit_lock here. If the
4023 * queue is not stopped for another reason, we
4026 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
4027 netif_schedule_queue(txq
);
4029 spin_unlock(&dev
->tx_global_lock
);
4032 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
4034 netif_tx_unlock(dev
);
4038 #define HARD_TX_LOCK(dev, txq, cpu) { \
4039 if ((dev->features & NETIF_F_LLTX) == 0) { \
4040 __netif_tx_lock(txq, cpu); \
4042 __netif_tx_acquire(txq); \
4046 #define HARD_TX_TRYLOCK(dev, txq) \
4047 (((dev->features & NETIF_F_LLTX) == 0) ? \
4048 __netif_tx_trylock(txq) : \
4049 __netif_tx_acquire(txq))
4051 #define HARD_TX_UNLOCK(dev, txq) { \
4052 if ((dev->features & NETIF_F_LLTX) == 0) { \
4053 __netif_tx_unlock(txq); \
4055 __netif_tx_release(txq); \
4059 static inline void netif_tx_disable(struct net_device
*dev
)
4065 cpu
= smp_processor_id();
4066 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
4067 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
4069 __netif_tx_lock(txq
, cpu
);
4070 netif_tx_stop_queue(txq
);
4071 __netif_tx_unlock(txq
);
4076 static inline void netif_addr_lock(struct net_device
*dev
)
4078 spin_lock(&dev
->addr_list_lock
);
4081 static inline void netif_addr_lock_bh(struct net_device
*dev
)
4083 spin_lock_bh(&dev
->addr_list_lock
);
4086 static inline void netif_addr_unlock(struct net_device
*dev
)
4088 spin_unlock(&dev
->addr_list_lock
);
4091 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
4093 spin_unlock_bh(&dev
->addr_list_lock
);
4097 * dev_addrs walker. Should be used only for read access. Call with
4098 * rcu_read_lock held.
4100 #define for_each_dev_addr(dev, ha) \
4101 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4103 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4105 void ether_setup(struct net_device
*dev
);
4107 /* Support for loadable net-drivers */
4108 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
4109 unsigned char name_assign_type
,
4110 void (*setup
)(struct net_device
*),
4111 unsigned int txqs
, unsigned int rxqs
);
4112 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4113 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4115 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4116 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4119 int register_netdev(struct net_device
*dev
);
4120 void unregister_netdev(struct net_device
*dev
);
4122 /* General hardware address lists handling functions */
4123 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
4124 struct netdev_hw_addr_list
*from_list
, int addr_len
);
4125 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
4126 struct netdev_hw_addr_list
*from_list
, int addr_len
);
4127 int __hw_addr_sync_dev(struct netdev_hw_addr_list
*list
,
4128 struct net_device
*dev
,
4129 int (*sync
)(struct net_device
*, const unsigned char *),
4130 int (*unsync
)(struct net_device
*,
4131 const unsigned char *));
4132 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list
*list
,
4133 struct net_device
*dev
,
4134 int (*sync
)(struct net_device
*,
4135 const unsigned char *, int),
4136 int (*unsync
)(struct net_device
*,
4137 const unsigned char *, int));
4138 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list
*list
,
4139 struct net_device
*dev
,
4140 int (*unsync
)(struct net_device
*,
4141 const unsigned char *, int));
4142 void __hw_addr_unsync_dev(struct netdev_hw_addr_list
*list
,
4143 struct net_device
*dev
,
4144 int (*unsync
)(struct net_device
*,
4145 const unsigned char *));
4146 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
4148 /* Functions used for device addresses handling */
4149 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
4150 unsigned char addr_type
);
4151 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
4152 unsigned char addr_type
);
4153 void dev_addr_flush(struct net_device
*dev
);
4154 int dev_addr_init(struct net_device
*dev
);
4156 /* Functions used for unicast addresses handling */
4157 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
4158 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
4159 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
4160 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
4161 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
4162 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
4163 void dev_uc_flush(struct net_device
*dev
);
4164 void dev_uc_init(struct net_device
*dev
);
4167 * __dev_uc_sync - Synchonize device's unicast list
4168 * @dev: device to sync
4169 * @sync: function to call if address should be added
4170 * @unsync: function to call if address should be removed
4172 * Add newly added addresses to the interface, and release
4173 * addresses that have been deleted.
4175 static inline int __dev_uc_sync(struct net_device
*dev
,
4176 int (*sync
)(struct net_device
*,
4177 const unsigned char *),
4178 int (*unsync
)(struct net_device
*,
4179 const unsigned char *))
4181 return __hw_addr_sync_dev(&dev
->uc
, dev
, sync
, unsync
);
4185 * __dev_uc_unsync - Remove synchronized addresses from device
4186 * @dev: device to sync
4187 * @unsync: function to call if address should be removed
4189 * Remove all addresses that were added to the device by dev_uc_sync().
4191 static inline void __dev_uc_unsync(struct net_device
*dev
,
4192 int (*unsync
)(struct net_device
*,
4193 const unsigned char *))
4195 __hw_addr_unsync_dev(&dev
->uc
, dev
, unsync
);
4198 /* Functions used for multicast addresses handling */
4199 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
4200 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
4201 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
4202 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
4203 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
4204 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
4205 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
4206 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
4207 void dev_mc_flush(struct net_device
*dev
);
4208 void dev_mc_init(struct net_device
*dev
);
4211 * __dev_mc_sync - Synchonize device's multicast list
4212 * @dev: device to sync
4213 * @sync: function to call if address should be added
4214 * @unsync: function to call if address should be removed
4216 * Add newly added addresses to the interface, and release
4217 * addresses that have been deleted.
4219 static inline int __dev_mc_sync(struct net_device
*dev
,
4220 int (*sync
)(struct net_device
*,
4221 const unsigned char *),
4222 int (*unsync
)(struct net_device
*,
4223 const unsigned char *))
4225 return __hw_addr_sync_dev(&dev
->mc
, dev
, sync
, unsync
);
4229 * __dev_mc_unsync - Remove synchronized addresses from device
4230 * @dev: device to sync
4231 * @unsync: function to call if address should be removed
4233 * Remove all addresses that were added to the device by dev_mc_sync().
4235 static inline void __dev_mc_unsync(struct net_device
*dev
,
4236 int (*unsync
)(struct net_device
*,
4237 const unsigned char *))
4239 __hw_addr_unsync_dev(&dev
->mc
, dev
, unsync
);
4242 /* Functions used for secondary unicast and multicast support */
4243 void dev_set_rx_mode(struct net_device
*dev
);
4244 void __dev_set_rx_mode(struct net_device
*dev
);
4245 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
4246 int dev_set_allmulti(struct net_device
*dev
, int inc
);
4247 void netdev_state_change(struct net_device
*dev
);
4248 void netdev_notify_peers(struct net_device
*dev
);
4249 void netdev_features_change(struct net_device
*dev
);
4250 /* Load a device via the kmod */
4251 void dev_load(struct net
*net
, const char *name
);
4252 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
4253 struct rtnl_link_stats64
*storage
);
4254 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
4255 const struct net_device_stats
*netdev_stats
);
4257 extern int netdev_max_backlog
;
4258 extern int netdev_tstamp_prequeue
;
4259 extern int weight_p
;
4260 extern int dev_weight_rx_bias
;
4261 extern int dev_weight_tx_bias
;
4262 extern int dev_rx_weight
;
4263 extern int dev_tx_weight
;
4264 extern int gro_normal_batch
;
4266 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
4267 struct net_device
*netdev_upper_get_next_dev_rcu(struct net_device
*dev
,
4268 struct list_head
**iter
);
4269 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
4270 struct list_head
**iter
);
4272 /* iterate through upper list, must be called under RCU read lock */
4273 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4274 for (iter = &(dev)->adj_list.upper, \
4275 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4277 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4279 int netdev_walk_all_upper_dev_rcu(struct net_device
*dev
,
4280 int (*fn
)(struct net_device
*upper_dev
,
4284 bool netdev_has_upper_dev_all_rcu(struct net_device
*dev
,
4285 struct net_device
*upper_dev
);
4287 bool netdev_has_any_upper_dev(struct net_device
*dev
);
4289 void *netdev_lower_get_next_private(struct net_device
*dev
,
4290 struct list_head
**iter
);
4291 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
4292 struct list_head
**iter
);
4294 #define netdev_for_each_lower_private(dev, priv, iter) \
4295 for (iter = (dev)->adj_list.lower.next, \
4296 priv = netdev_lower_get_next_private(dev, &(iter)); \
4298 priv = netdev_lower_get_next_private(dev, &(iter)))
4300 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4301 for (iter = &(dev)->adj_list.lower, \
4302 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4304 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4306 void *netdev_lower_get_next(struct net_device
*dev
,
4307 struct list_head
**iter
);
4309 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4310 for (iter = (dev)->adj_list.lower.next, \
4311 ldev = netdev_lower_get_next(dev, &(iter)); \
4313 ldev = netdev_lower_get_next(dev, &(iter)))
4315 struct net_device
*netdev_all_lower_get_next(struct net_device
*dev
,
4316 struct list_head
**iter
);
4317 struct net_device
*netdev_all_lower_get_next_rcu(struct net_device
*dev
,
4318 struct list_head
**iter
);
4320 int netdev_walk_all_lower_dev(struct net_device
*dev
,
4321 int (*fn
)(struct net_device
*lower_dev
,
4324 int netdev_walk_all_lower_dev_rcu(struct net_device
*dev
,
4325 int (*fn
)(struct net_device
*lower_dev
,
4329 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
4330 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
4331 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
4332 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
4333 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
,
4334 struct netlink_ext_ack
*extack
);
4335 int netdev_master_upper_dev_link(struct net_device
*dev
,
4336 struct net_device
*upper_dev
,
4337 void *upper_priv
, void *upper_info
,
4338 struct netlink_ext_ack
*extack
);
4339 void netdev_upper_dev_unlink(struct net_device
*dev
,
4340 struct net_device
*upper_dev
);
4341 int netdev_adjacent_change_prepare(struct net_device
*old_dev
,
4342 struct net_device
*new_dev
,
4343 struct net_device
*dev
,
4344 struct netlink_ext_ack
*extack
);
4345 void netdev_adjacent_change_commit(struct net_device
*old_dev
,
4346 struct net_device
*new_dev
,
4347 struct net_device
*dev
);
4348 void netdev_adjacent_change_abort(struct net_device
*old_dev
,
4349 struct net_device
*new_dev
,
4350 struct net_device
*dev
);
4351 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
4352 void *netdev_lower_dev_get_private(struct net_device
*dev
,
4353 struct net_device
*lower_dev
);
4354 void netdev_lower_state_changed(struct net_device
*lower_dev
,
4355 void *lower_state_info
);
4357 /* RSS keys are 40 or 52 bytes long */
4358 #define NETDEV_RSS_KEY_LEN 52
4359 extern u8 netdev_rss_key
[NETDEV_RSS_KEY_LEN
] __read_mostly
;
4360 void netdev_rss_key_fill(void *buffer
, size_t len
);
4362 int skb_checksum_help(struct sk_buff
*skb
);
4363 int skb_crc32c_csum_help(struct sk_buff
*skb
);
4364 int skb_csum_hwoffload_help(struct sk_buff
*skb
,
4365 const netdev_features_t features
);
4367 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
4368 netdev_features_t features
, bool tx_path
);
4369 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
4370 netdev_features_t features
);
4372 struct netdev_bonding_info
{
4377 struct netdev_notifier_bonding_info
{
4378 struct netdev_notifier_info info
; /* must be first */
4379 struct netdev_bonding_info bonding_info
;
4382 void netdev_bonding_info_change(struct net_device
*dev
,
4383 struct netdev_bonding_info
*bonding_info
);
4386 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
4388 return __skb_gso_segment(skb
, features
, true);
4390 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
4392 static inline bool can_checksum_protocol(netdev_features_t features
,
4395 if (protocol
== htons(ETH_P_FCOE
))
4396 return !!(features
& NETIF_F_FCOE_CRC
);
4398 /* Assume this is an IP checksum (not SCTP CRC) */
4400 if (features
& NETIF_F_HW_CSUM
) {
4401 /* Can checksum everything */
4406 case htons(ETH_P_IP
):
4407 return !!(features
& NETIF_F_IP_CSUM
);
4408 case htons(ETH_P_IPV6
):
4409 return !!(features
& NETIF_F_IPV6_CSUM
);
4416 void netdev_rx_csum_fault(struct net_device
*dev
, struct sk_buff
*skb
);
4418 static inline void netdev_rx_csum_fault(struct net_device
*dev
,
4419 struct sk_buff
*skb
)
4423 /* rx skb timestamps */
4424 void net_enable_timestamp(void);
4425 void net_disable_timestamp(void);
4427 #ifdef CONFIG_PROC_FS
4428 int __init
dev_proc_init(void);
4430 #define dev_proc_init() 0
4433 static inline netdev_tx_t
__netdev_start_xmit(const struct net_device_ops
*ops
,
4434 struct sk_buff
*skb
, struct net_device
*dev
,
4437 __this_cpu_write(softnet_data
.xmit
.more
, more
);
4438 return ops
->ndo_start_xmit(skb
, dev
);
4441 static inline bool netdev_xmit_more(void)
4443 return __this_cpu_read(softnet_data
.xmit
.more
);
4446 static inline netdev_tx_t
netdev_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
4447 struct netdev_queue
*txq
, bool more
)
4449 const struct net_device_ops
*ops
= dev
->netdev_ops
;
4452 rc
= __netdev_start_xmit(ops
, skb
, dev
, more
);
4453 if (rc
== NETDEV_TX_OK
)
4454 txq_trans_update(txq
);
4459 int netdev_class_create_file_ns(const struct class_attribute
*class_attr
,
4461 void netdev_class_remove_file_ns(const struct class_attribute
*class_attr
,
4464 static inline int netdev_class_create_file(const struct class_attribute
*class_attr
)
4466 return netdev_class_create_file_ns(class_attr
, NULL
);
4469 static inline void netdev_class_remove_file(const struct class_attribute
*class_attr
)
4471 netdev_class_remove_file_ns(class_attr
, NULL
);
4474 extern const struct kobj_ns_type_operations net_ns_type_operations
;
4476 const char *netdev_drivername(const struct net_device
*dev
);
4478 void linkwatch_run_queue(void);
4480 static inline netdev_features_t
netdev_intersect_features(netdev_features_t f1
,
4481 netdev_features_t f2
)
4483 if ((f1
^ f2
) & NETIF_F_HW_CSUM
) {
4484 if (f1
& NETIF_F_HW_CSUM
)
4485 f1
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4487 f2
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4493 static inline netdev_features_t
netdev_get_wanted_features(
4494 struct net_device
*dev
)
4496 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
4498 netdev_features_t
netdev_increment_features(netdev_features_t all
,
4499 netdev_features_t one
, netdev_features_t mask
);
4501 /* Allow TSO being used on stacked device :
4502 * Performing the GSO segmentation before last device
4503 * is a performance improvement.
4505 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
4506 netdev_features_t mask
)
4508 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
4511 int __netdev_update_features(struct net_device
*dev
);
4512 void netdev_update_features(struct net_device
*dev
);
4513 void netdev_change_features(struct net_device
*dev
);
4515 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
4516 struct net_device
*dev
);
4518 netdev_features_t
passthru_features_check(struct sk_buff
*skb
,
4519 struct net_device
*dev
,
4520 netdev_features_t features
);
4521 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
4523 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
4525 netdev_features_t feature
= (netdev_features_t
)gso_type
<< NETIF_F_GSO_SHIFT
;
4527 /* check flags correspondence */
4528 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
4529 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
4530 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
4531 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID
!= (NETIF_F_TSO_MANGLEID
>> NETIF_F_GSO_SHIFT
));
4532 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
4533 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
4534 BUILD_BUG_ON(SKB_GSO_GRE
!= (NETIF_F_GSO_GRE
>> NETIF_F_GSO_SHIFT
));
4535 BUILD_BUG_ON(SKB_GSO_GRE_CSUM
!= (NETIF_F_GSO_GRE_CSUM
>> NETIF_F_GSO_SHIFT
));
4536 BUILD_BUG_ON(SKB_GSO_IPXIP4
!= (NETIF_F_GSO_IPXIP4
>> NETIF_F_GSO_SHIFT
));
4537 BUILD_BUG_ON(SKB_GSO_IPXIP6
!= (NETIF_F_GSO_IPXIP6
>> NETIF_F_GSO_SHIFT
));
4538 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL
!= (NETIF_F_GSO_UDP_TUNNEL
>> NETIF_F_GSO_SHIFT
));
4539 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM
!= (NETIF_F_GSO_UDP_TUNNEL_CSUM
>> NETIF_F_GSO_SHIFT
));
4540 BUILD_BUG_ON(SKB_GSO_PARTIAL
!= (NETIF_F_GSO_PARTIAL
>> NETIF_F_GSO_SHIFT
));
4541 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM
!= (NETIF_F_GSO_TUNNEL_REMCSUM
>> NETIF_F_GSO_SHIFT
));
4542 BUILD_BUG_ON(SKB_GSO_SCTP
!= (NETIF_F_GSO_SCTP
>> NETIF_F_GSO_SHIFT
));
4543 BUILD_BUG_ON(SKB_GSO_ESP
!= (NETIF_F_GSO_ESP
>> NETIF_F_GSO_SHIFT
));
4544 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_GSO_UDP
>> NETIF_F_GSO_SHIFT
));
4545 BUILD_BUG_ON(SKB_GSO_UDP_L4
!= (NETIF_F_GSO_UDP_L4
>> NETIF_F_GSO_SHIFT
));
4547 return (features
& feature
) == feature
;
4550 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
4552 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
4553 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
4556 static inline bool netif_needs_gso(struct sk_buff
*skb
,
4557 netdev_features_t features
)
4559 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
4560 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
4561 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
4564 static inline void netif_set_gso_max_size(struct net_device
*dev
,
4567 dev
->gso_max_size
= size
;
4570 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
4571 int pulled_hlen
, u16 mac_offset
,
4574 skb
->protocol
= protocol
;
4575 skb
->encapsulation
= 1;
4576 skb_push(skb
, pulled_hlen
);
4577 skb_reset_transport_header(skb
);
4578 skb
->mac_header
= mac_offset
;
4579 skb
->network_header
= skb
->mac_header
+ mac_len
;
4580 skb
->mac_len
= mac_len
;
4583 static inline bool netif_is_macsec(const struct net_device
*dev
)
4585 return dev
->priv_flags
& IFF_MACSEC
;
4588 static inline bool netif_is_macvlan(const struct net_device
*dev
)
4590 return dev
->priv_flags
& IFF_MACVLAN
;
4593 static inline bool netif_is_macvlan_port(const struct net_device
*dev
)
4595 return dev
->priv_flags
& IFF_MACVLAN_PORT
;
4598 static inline bool netif_is_bond_master(const struct net_device
*dev
)
4600 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
4603 static inline bool netif_is_bond_slave(const struct net_device
*dev
)
4605 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
4608 static inline bool netif_supports_nofcs(struct net_device
*dev
)
4610 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
4613 static inline bool netif_has_l3_rx_handler(const struct net_device
*dev
)
4615 return dev
->priv_flags
& IFF_L3MDEV_RX_HANDLER
;
4618 static inline bool netif_is_l3_master(const struct net_device
*dev
)
4620 return dev
->priv_flags
& IFF_L3MDEV_MASTER
;
4623 static inline bool netif_is_l3_slave(const struct net_device
*dev
)
4625 return dev
->priv_flags
& IFF_L3MDEV_SLAVE
;
4628 static inline bool netif_is_bridge_master(const struct net_device
*dev
)
4630 return dev
->priv_flags
& IFF_EBRIDGE
;
4633 static inline bool netif_is_bridge_port(const struct net_device
*dev
)
4635 return dev
->priv_flags
& IFF_BRIDGE_PORT
;
4638 static inline bool netif_is_ovs_master(const struct net_device
*dev
)
4640 return dev
->priv_flags
& IFF_OPENVSWITCH
;
4643 static inline bool netif_is_ovs_port(const struct net_device
*dev
)
4645 return dev
->priv_flags
& IFF_OVS_DATAPATH
;
4648 static inline bool netif_is_team_master(const struct net_device
*dev
)
4650 return dev
->priv_flags
& IFF_TEAM
;
4653 static inline bool netif_is_team_port(const struct net_device
*dev
)
4655 return dev
->priv_flags
& IFF_TEAM_PORT
;
4658 static inline bool netif_is_lag_master(const struct net_device
*dev
)
4660 return netif_is_bond_master(dev
) || netif_is_team_master(dev
);
4663 static inline bool netif_is_lag_port(const struct net_device
*dev
)
4665 return netif_is_bond_slave(dev
) || netif_is_team_port(dev
);
4668 static inline bool netif_is_rxfh_configured(const struct net_device
*dev
)
4670 return dev
->priv_flags
& IFF_RXFH_CONFIGURED
;
4673 static inline bool netif_is_failover(const struct net_device
*dev
)
4675 return dev
->priv_flags
& IFF_FAILOVER
;
4678 static inline bool netif_is_failover_slave(const struct net_device
*dev
)
4680 return dev
->priv_flags
& IFF_FAILOVER_SLAVE
;
4683 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4684 static inline void netif_keep_dst(struct net_device
*dev
)
4686 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
);
4689 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4690 static inline bool netif_reduces_vlan_mtu(struct net_device
*dev
)
4692 /* TODO: reserve and use an additional IFF bit, if we get more users */
4693 return dev
->priv_flags
& IFF_MACSEC
;
4696 extern struct pernet_operations __net_initdata loopback_net_ops
;
4698 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4700 /* netdev_printk helpers, similar to dev_printk */
4702 static inline const char *netdev_name(const struct net_device
*dev
)
4704 if (!dev
->name
[0] || strchr(dev
->name
, '%'))
4705 return "(unnamed net_device)";
4709 static inline bool netdev_unregistering(const struct net_device
*dev
)
4711 return dev
->reg_state
== NETREG_UNREGISTERING
;
4714 static inline const char *netdev_reg_state(const struct net_device
*dev
)
4716 switch (dev
->reg_state
) {
4717 case NETREG_UNINITIALIZED
: return " (uninitialized)";
4718 case NETREG_REGISTERED
: return "";
4719 case NETREG_UNREGISTERING
: return " (unregistering)";
4720 case NETREG_UNREGISTERED
: return " (unregistered)";
4721 case NETREG_RELEASED
: return " (released)";
4722 case NETREG_DUMMY
: return " (dummy)";
4725 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev
->name
, dev
->reg_state
);
4726 return " (unknown)";
4729 __printf(3, 4) __cold
4730 void netdev_printk(const char *level
, const struct net_device
*dev
,
4731 const char *format
, ...);
4732 __printf(2, 3) __cold
4733 void netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
4734 __printf(2, 3) __cold
4735 void netdev_alert(const struct net_device
*dev
, const char *format
, ...);
4736 __printf(2, 3) __cold
4737 void netdev_crit(const struct net_device
*dev
, const char *format
, ...);
4738 __printf(2, 3) __cold
4739 void netdev_err(const struct net_device
*dev
, const char *format
, ...);
4740 __printf(2, 3) __cold
4741 void netdev_warn(const struct net_device
*dev
, const char *format
, ...);
4742 __printf(2, 3) __cold
4743 void netdev_notice(const struct net_device
*dev
, const char *format
, ...);
4744 __printf(2, 3) __cold
4745 void netdev_info(const struct net_device
*dev
, const char *format
, ...);
4747 #define netdev_level_once(level, dev, fmt, ...) \
4749 static bool __print_once __read_mostly; \
4751 if (!__print_once) { \
4752 __print_once = true; \
4753 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4757 #define netdev_emerg_once(dev, fmt, ...) \
4758 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4759 #define netdev_alert_once(dev, fmt, ...) \
4760 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4761 #define netdev_crit_once(dev, fmt, ...) \
4762 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4763 #define netdev_err_once(dev, fmt, ...) \
4764 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4765 #define netdev_warn_once(dev, fmt, ...) \
4766 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4767 #define netdev_notice_once(dev, fmt, ...) \
4768 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4769 #define netdev_info_once(dev, fmt, ...) \
4770 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4772 #define MODULE_ALIAS_NETDEV(device) \
4773 MODULE_ALIAS("netdev-" device)
4775 #if defined(CONFIG_DYNAMIC_DEBUG)
4776 #define netdev_dbg(__dev, format, args...) \
4778 dynamic_netdev_dbg(__dev, format, ##args); \
4780 #elif defined(DEBUG)
4781 #define netdev_dbg(__dev, format, args...) \
4782 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4784 #define netdev_dbg(__dev, format, args...) \
4787 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4791 #if defined(VERBOSE_DEBUG)
4792 #define netdev_vdbg netdev_dbg
4795 #define netdev_vdbg(dev, format, args...) \
4798 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4804 * netdev_WARN() acts like dev_printk(), but with the key difference
4805 * of using a WARN/WARN_ON to get the message out, including the
4806 * file/line information and a backtrace.
4808 #define netdev_WARN(dev, format, args...) \
4809 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4810 netdev_reg_state(dev), ##args)
4812 #define netdev_WARN_ONCE(dev, format, args...) \
4813 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4814 netdev_reg_state(dev), ##args)
4816 /* netif printk helpers, similar to netdev_printk */
4818 #define netif_printk(priv, type, level, dev, fmt, args...) \
4820 if (netif_msg_##type(priv)) \
4821 netdev_printk(level, (dev), fmt, ##args); \
4824 #define netif_level(level, priv, type, dev, fmt, args...) \
4826 if (netif_msg_##type(priv)) \
4827 netdev_##level(dev, fmt, ##args); \
4830 #define netif_emerg(priv, type, dev, fmt, args...) \
4831 netif_level(emerg, priv, type, dev, fmt, ##args)
4832 #define netif_alert(priv, type, dev, fmt, args...) \
4833 netif_level(alert, priv, type, dev, fmt, ##args)
4834 #define netif_crit(priv, type, dev, fmt, args...) \
4835 netif_level(crit, priv, type, dev, fmt, ##args)
4836 #define netif_err(priv, type, dev, fmt, args...) \
4837 netif_level(err, priv, type, dev, fmt, ##args)
4838 #define netif_warn(priv, type, dev, fmt, args...) \
4839 netif_level(warn, priv, type, dev, fmt, ##args)
4840 #define netif_notice(priv, type, dev, fmt, args...) \
4841 netif_level(notice, priv, type, dev, fmt, ##args)
4842 #define netif_info(priv, type, dev, fmt, args...) \
4843 netif_level(info, priv, type, dev, fmt, ##args)
4845 #if defined(CONFIG_DYNAMIC_DEBUG)
4846 #define netif_dbg(priv, type, netdev, format, args...) \
4848 if (netif_msg_##type(priv)) \
4849 dynamic_netdev_dbg(netdev, format, ##args); \
4851 #elif defined(DEBUG)
4852 #define netif_dbg(priv, type, dev, format, args...) \
4853 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4855 #define netif_dbg(priv, type, dev, format, args...) \
4858 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4863 /* if @cond then downgrade to debug, else print at @level */
4864 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4867 netif_dbg(priv, type, netdev, fmt, ##args); \
4869 netif_ ## level(priv, type, netdev, fmt, ##args); \
4872 #if defined(VERBOSE_DEBUG)
4873 #define netif_vdbg netif_dbg
4875 #define netif_vdbg(priv, type, dev, format, args...) \
4878 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4884 * The list of packet types we will receive (as opposed to discard)
4885 * and the routines to invoke.
4887 * Why 16. Because with 16 the only overlap we get on a hash of the
4888 * low nibble of the protocol value is RARP/SNAP/X.25.
4902 #define PTYPE_HASH_SIZE (16)
4903 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4905 extern struct net_device
*blackhole_netdev
;
4907 #endif /* _LINUX_NETDEVICE_H */