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 hrtimer timer
;
336 struct list_head dev_list
;
337 struct hlist_node napi_hash_node
;
338 unsigned int napi_id
;
342 NAPI_STATE_SCHED
, /* Poll is scheduled */
343 NAPI_STATE_MISSED
, /* reschedule a napi */
344 NAPI_STATE_DISABLE
, /* Disable pending */
345 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
346 NAPI_STATE_HASHED
, /* In NAPI hash (busy polling possible) */
347 NAPI_STATE_NO_BUSY_POLL
,/* Do not add in napi_hash, no busy polling */
348 NAPI_STATE_IN_BUSY_POLL
,/* sk_busy_loop() owns this NAPI */
352 NAPIF_STATE_SCHED
= BIT(NAPI_STATE_SCHED
),
353 NAPIF_STATE_MISSED
= BIT(NAPI_STATE_MISSED
),
354 NAPIF_STATE_DISABLE
= BIT(NAPI_STATE_DISABLE
),
355 NAPIF_STATE_NPSVC
= BIT(NAPI_STATE_NPSVC
),
356 NAPIF_STATE_HASHED
= BIT(NAPI_STATE_HASHED
),
357 NAPIF_STATE_NO_BUSY_POLL
= BIT(NAPI_STATE_NO_BUSY_POLL
),
358 NAPIF_STATE_IN_BUSY_POLL
= BIT(NAPI_STATE_IN_BUSY_POLL
),
369 typedef enum gro_result gro_result_t
;
372 * enum rx_handler_result - Possible return values for rx_handlers.
373 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
375 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
376 * case skb->dev was changed by rx_handler.
377 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
378 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
380 * rx_handlers are functions called from inside __netif_receive_skb(), to do
381 * special processing of the skb, prior to delivery to protocol handlers.
383 * Currently, a net_device can only have a single rx_handler registered. Trying
384 * to register a second rx_handler will return -EBUSY.
386 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
387 * To unregister a rx_handler on a net_device, use
388 * netdev_rx_handler_unregister().
390 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
393 * If the rx_handler consumed the skb in some way, it should return
394 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
395 * the skb to be delivered in some other way.
397 * If the rx_handler changed skb->dev, to divert the skb to another
398 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
399 * new device will be called if it exists.
401 * If the rx_handler decides the skb should be ignored, it should return
402 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
403 * are registered on exact device (ptype->dev == skb->dev).
405 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
406 * delivered, it should return RX_HANDLER_PASS.
408 * A device without a registered rx_handler will behave as if rx_handler
409 * returned RX_HANDLER_PASS.
412 enum rx_handler_result
{
418 typedef enum rx_handler_result rx_handler_result_t
;
419 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
421 void __napi_schedule(struct napi_struct
*n
);
422 void __napi_schedule_irqoff(struct napi_struct
*n
);
424 static inline bool napi_disable_pending(struct napi_struct
*n
)
426 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
429 bool napi_schedule_prep(struct napi_struct
*n
);
432 * napi_schedule - schedule NAPI poll
435 * Schedule NAPI poll routine to be called if it is not already
438 static inline void napi_schedule(struct napi_struct
*n
)
440 if (napi_schedule_prep(n
))
445 * napi_schedule_irqoff - schedule NAPI poll
448 * Variant of napi_schedule(), assuming hard irqs are masked.
450 static inline void napi_schedule_irqoff(struct napi_struct
*n
)
452 if (napi_schedule_prep(n
))
453 __napi_schedule_irqoff(n
);
456 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
457 static inline bool napi_reschedule(struct napi_struct
*napi
)
459 if (napi_schedule_prep(napi
)) {
460 __napi_schedule(napi
);
466 bool napi_complete_done(struct napi_struct
*n
, int work_done
);
468 * napi_complete - NAPI processing complete
471 * Mark NAPI processing as complete.
472 * Consider using napi_complete_done() instead.
473 * Return false if device should avoid rearming interrupts.
475 static inline bool napi_complete(struct napi_struct
*n
)
477 return napi_complete_done(n
, 0);
481 * napi_hash_del - remove a NAPI from global table
482 * @napi: NAPI context
484 * Warning: caller must observe RCU grace period
485 * before freeing memory containing @napi, if
486 * this function returns true.
487 * Note: core networking stack automatically calls it
488 * from netif_napi_del().
489 * Drivers might want to call this helper to combine all
490 * the needed RCU grace periods into a single one.
492 bool napi_hash_del(struct napi_struct
*napi
);
495 * napi_disable - prevent NAPI from scheduling
498 * Stop NAPI from being scheduled on this context.
499 * Waits till any outstanding processing completes.
501 void napi_disable(struct napi_struct
*n
);
504 * napi_enable - enable NAPI scheduling
507 * Resume NAPI from being scheduled on this context.
508 * Must be paired with napi_disable.
510 static inline void napi_enable(struct napi_struct
*n
)
512 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
513 smp_mb__before_atomic();
514 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
515 clear_bit(NAPI_STATE_NPSVC
, &n
->state
);
519 * napi_synchronize - wait until NAPI is not running
522 * Wait until NAPI is done being scheduled on this context.
523 * Waits till any outstanding processing completes but
524 * does not disable future activations.
526 static inline void napi_synchronize(const struct napi_struct
*n
)
528 if (IS_ENABLED(CONFIG_SMP
))
529 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
536 * napi_if_scheduled_mark_missed - if napi is running, set the
540 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
543 static inline bool napi_if_scheduled_mark_missed(struct napi_struct
*n
)
545 unsigned long val
, new;
548 val
= READ_ONCE(n
->state
);
549 if (val
& NAPIF_STATE_DISABLE
)
552 if (!(val
& NAPIF_STATE_SCHED
))
555 new = val
| NAPIF_STATE_MISSED
;
556 } while (cmpxchg(&n
->state
, val
, new) != val
);
561 enum netdev_queue_state_t
{
562 __QUEUE_STATE_DRV_XOFF
,
563 __QUEUE_STATE_STACK_XOFF
,
564 __QUEUE_STATE_FROZEN
,
567 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
568 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
569 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
571 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
572 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
574 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
578 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
579 * netif_tx_* functions below are used to manipulate this flag. The
580 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
581 * queue independently. The netif_xmit_*stopped functions below are called
582 * to check if the queue has been stopped by the driver or stack (either
583 * of the XOFF bits are set in the state). Drivers should not need to call
584 * netif_xmit*stopped functions, they should only be using netif_tx_*.
587 struct netdev_queue
{
591 struct net_device
*dev
;
592 struct Qdisc __rcu
*qdisc
;
593 struct Qdisc
*qdisc_sleeping
;
597 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
600 unsigned long tx_maxrate
;
602 * Number of TX timeouts for this queue
603 * (/sys/class/net/DEV/Q/trans_timeout)
605 unsigned long trans_timeout
;
607 /* Subordinate device that the queue has been assigned to */
608 struct net_device
*sb_dev
;
609 #ifdef CONFIG_XDP_SOCKETS
610 struct xdp_umem
*umem
;
615 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
618 * Time (in jiffies) of last Tx
620 unsigned long trans_start
;
627 } ____cacheline_aligned_in_smp
;
629 extern int sysctl_fb_tunnels_only_for_init_net
;
630 extern int sysctl_devconf_inherit_init_net
;
632 static inline bool net_has_fallback_tunnels(const struct net
*net
)
634 return net
== &init_net
||
635 !IS_ENABLED(CONFIG_SYSCTL
) ||
636 !sysctl_fb_tunnels_only_for_init_net
;
639 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
641 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
648 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
650 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
657 * This structure holds an RPS map which can be of variable length. The
658 * map is an array of CPUs.
665 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
668 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
669 * tail pointer for that CPU's input queue at the time of last enqueue, and
670 * a hardware filter index.
672 struct rps_dev_flow
{
675 unsigned int last_qtail
;
677 #define RPS_NO_FILTER 0xffff
680 * The rps_dev_flow_table structure contains a table of flow mappings.
682 struct rps_dev_flow_table
{
685 struct rps_dev_flow flows
[0];
687 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
688 ((_num) * sizeof(struct rps_dev_flow)))
691 * The rps_sock_flow_table contains mappings of flows to the last CPU
692 * on which they were processed by the application (set in recvmsg).
693 * Each entry is a 32bit value. Upper part is the high-order bits
694 * of flow hash, lower part is CPU number.
695 * rps_cpu_mask is used to partition the space, depending on number of
696 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
697 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
698 * meaning we use 32-6=26 bits for the hash.
700 struct rps_sock_flow_table
{
703 u32 ents
[0] ____cacheline_aligned_in_smp
;
705 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
707 #define RPS_NO_CPU 0xffff
709 extern u32 rps_cpu_mask
;
710 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
712 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
716 unsigned int index
= hash
& table
->mask
;
717 u32 val
= hash
& ~rps_cpu_mask
;
719 /* We only give a hint, preemption can change CPU under us */
720 val
|= raw_smp_processor_id();
722 if (table
->ents
[index
] != val
)
723 table
->ents
[index
] = val
;
727 #ifdef CONFIG_RFS_ACCEL
728 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
731 #endif /* CONFIG_RPS */
733 /* This structure contains an instance of an RX queue. */
734 struct netdev_rx_queue
{
736 struct rps_map __rcu
*rps_map
;
737 struct rps_dev_flow_table __rcu
*rps_flow_table
;
740 struct net_device
*dev
;
741 struct xdp_rxq_info xdp_rxq
;
742 #ifdef CONFIG_XDP_SOCKETS
743 struct xdp_umem
*umem
;
745 } ____cacheline_aligned_in_smp
;
748 * RX queue sysfs structures and functions.
750 struct rx_queue_attribute
{
751 struct attribute attr
;
752 ssize_t (*show
)(struct netdev_rx_queue
*queue
, char *buf
);
753 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
754 const char *buf
, size_t len
);
759 * This structure holds an XPS map which can be of variable length. The
760 * map is an array of queues.
764 unsigned int alloc_len
;
768 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
769 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
770 - sizeof(struct xps_map)) / sizeof(u16))
773 * This structure holds all XPS maps for device. Maps are indexed by CPU.
775 struct xps_dev_maps
{
777 struct xps_map __rcu
*attr_map
[0]; /* Either CPUs map or RXQs map */
780 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
781 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
783 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
784 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
786 #endif /* CONFIG_XPS */
788 #define TC_MAX_QUEUE 16
789 #define TC_BITMASK 15
790 /* HW offloaded queuing disciplines txq count and offset maps */
791 struct netdev_tc_txq
{
796 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
798 * This structure is to hold information about the device
799 * configured to run FCoE protocol stack.
801 struct netdev_fcoe_hbainfo
{
802 char manufacturer
[64];
803 char serial_number
[64];
804 char hardware_version
[64];
805 char driver_version
[64];
806 char optionrom_version
[64];
807 char firmware_version
[64];
809 char model_description
[256];
813 #define MAX_PHYS_ITEM_ID_LEN 32
815 /* This structure holds a unique identifier to identify some
816 * physical item (port for example) used by a netdevice.
818 struct netdev_phys_item_id
{
819 unsigned char id
[MAX_PHYS_ITEM_ID_LEN
];
820 unsigned char id_len
;
823 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id
*a
,
824 struct netdev_phys_item_id
*b
)
826 return a
->id_len
== b
->id_len
&&
827 memcmp(a
->id
, b
->id
, a
->id_len
) == 0;
830 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
832 struct net_device
*sb_dev
);
835 TC_SETUP_QDISC_MQPRIO
,
838 TC_SETUP_CLSMATCHALL
,
850 /* These structures hold the attributes of bpf state that are being passed
851 * to the netdevice through the bpf op.
853 enum bpf_netdev_command
{
854 /* Set or clear a bpf program used in the earliest stages of packet
855 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
856 * is responsible for calling bpf_prog_put on any old progs that are
857 * stored. In case of error, the callee need not release the new prog
858 * reference, but on success it takes ownership and must bpf_prog_put
859 * when it is no longer used.
865 /* BPF program for offload callbacks, invoked at program load time. */
866 BPF_OFFLOAD_MAP_ALLOC
,
867 BPF_OFFLOAD_MAP_FREE
,
871 struct bpf_prog_offload_ops
;
872 struct netlink_ext_ack
;
876 enum bpf_netdev_command command
;
881 struct bpf_prog
*prog
;
882 struct netlink_ext_ack
*extack
;
884 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
887 /* flags with which program was installed */
890 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
892 struct bpf_offloaded_map
*offmap
;
894 /* XDP_SETUP_XSK_UMEM */
896 struct xdp_umem
*umem
;
902 #ifdef CONFIG_XFRM_OFFLOAD
904 int (*xdo_dev_state_add
) (struct xfrm_state
*x
);
905 void (*xdo_dev_state_delete
) (struct xfrm_state
*x
);
906 void (*xdo_dev_state_free
) (struct xfrm_state
*x
);
907 bool (*xdo_dev_offload_ok
) (struct sk_buff
*skb
,
908 struct xfrm_state
*x
);
909 void (*xdo_dev_state_advance_esn
) (struct xfrm_state
*x
);
914 struct rcu_head rcuhead
;
922 * This structure defines the management hooks for network devices.
923 * The following hooks can be defined; unless noted otherwise, they are
924 * optional and can be filled with a null pointer.
926 * int (*ndo_init)(struct net_device *dev);
927 * This function is called once when a network device is registered.
928 * The network device can use this for any late stage initialization
929 * or semantic validation. It can fail with an error code which will
930 * be propagated back to register_netdev.
932 * void (*ndo_uninit)(struct net_device *dev);
933 * This function is called when device is unregistered or when registration
934 * fails. It is not called if init fails.
936 * int (*ndo_open)(struct net_device *dev);
937 * This function is called when a network device transitions to the up
940 * int (*ndo_stop)(struct net_device *dev);
941 * This function is called when a network device transitions to the down
944 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
945 * struct net_device *dev);
946 * Called when a packet needs to be transmitted.
947 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
948 * the queue before that can happen; it's for obsolete devices and weird
949 * corner cases, but the stack really does a non-trivial amount
950 * of useless work if you return NETDEV_TX_BUSY.
951 * Required; cannot be NULL.
953 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
954 * struct net_device *dev
955 * netdev_features_t features);
956 * Called by core transmit path to determine if device is capable of
957 * performing offload operations on a given packet. This is to give
958 * the device an opportunity to implement any restrictions that cannot
959 * be otherwise expressed by feature flags. The check is called with
960 * the set of features that the stack has calculated and it returns
961 * those the driver believes to be appropriate.
963 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
964 * struct net_device *sb_dev);
965 * Called to decide which queue to use when device supports multiple
968 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
969 * This function is called to allow device receiver to make
970 * changes to configuration when multicast or promiscuous is enabled.
972 * void (*ndo_set_rx_mode)(struct net_device *dev);
973 * This function is called device changes address list filtering.
974 * If driver handles unicast address filtering, it should set
975 * IFF_UNICAST_FLT in its priv_flags.
977 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
978 * This function is called when the Media Access Control address
979 * needs to be changed. If this interface is not defined, the
980 * MAC address can not be changed.
982 * int (*ndo_validate_addr)(struct net_device *dev);
983 * Test if Media Access Control address is valid for the device.
985 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
986 * Called when a user requests an ioctl which can't be handled by
987 * the generic interface code. If not defined ioctls return
988 * not supported error code.
990 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
991 * Used to set network devices bus interface parameters. This interface
992 * is retained for legacy reasons; new devices should use the bus
993 * interface (PCI) for low level management.
995 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
996 * Called when a user wants to change the Maximum Transfer Unit
999 * void (*ndo_tx_timeout)(struct net_device *dev);
1000 * Callback used when the transmitter has not made any progress
1001 * for dev->watchdog ticks.
1003 * void (*ndo_get_stats64)(struct net_device *dev,
1004 * struct rtnl_link_stats64 *storage);
1005 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1006 * Called when a user wants to get the network device usage
1007 * statistics. Drivers must do one of the following:
1008 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1009 * rtnl_link_stats64 structure passed by the caller.
1010 * 2. Define @ndo_get_stats to update a net_device_stats structure
1011 * (which should normally be dev->stats) and return a pointer to
1012 * it. The structure may be changed asynchronously only if each
1013 * field is written atomically.
1014 * 3. Update dev->stats asynchronously and atomically, and define
1015 * neither operation.
1017 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1018 * Return true if this device supports offload stats of this attr_id.
1020 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1022 * Get statistics for offload operations by attr_id. Write it into the
1023 * attr_data pointer.
1025 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1026 * If device supports VLAN filtering this function is called when a
1027 * VLAN id is registered.
1029 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1030 * If device supports VLAN filtering this function is called when a
1031 * VLAN id is unregistered.
1033 * void (*ndo_poll_controller)(struct net_device *dev);
1035 * SR-IOV management functions.
1036 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1037 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1038 * u8 qos, __be16 proto);
1039 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1041 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1042 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1043 * int (*ndo_get_vf_config)(struct net_device *dev,
1044 * int vf, struct ifla_vf_info *ivf);
1045 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1046 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1047 * struct nlattr *port[]);
1049 * Enable or disable the VF ability to query its RSS Redirection Table and
1050 * Hash Key. This is needed since on some devices VF share this information
1051 * with PF and querying it may introduce a theoretical security risk.
1052 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1053 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1054 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1056 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1057 * This is always called from the stack with the rtnl lock held and netif
1058 * tx queues stopped. This allows the netdevice to perform queue
1059 * management safely.
1061 * Fiber Channel over Ethernet (FCoE) offload functions.
1062 * int (*ndo_fcoe_enable)(struct net_device *dev);
1063 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1064 * so the underlying device can perform whatever needed configuration or
1065 * initialization to support acceleration of FCoE traffic.
1067 * int (*ndo_fcoe_disable)(struct net_device *dev);
1068 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1069 * so the underlying device can perform whatever needed clean-ups to
1070 * stop supporting acceleration of FCoE traffic.
1072 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1073 * struct scatterlist *sgl, unsigned int sgc);
1074 * Called when the FCoE Initiator wants to initialize an I/O that
1075 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1076 * perform necessary setup and returns 1 to indicate the device is set up
1077 * successfully to perform DDP on this I/O, otherwise this returns 0.
1079 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1080 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1081 * indicated by the FC exchange id 'xid', so the underlying device can
1082 * clean up and reuse resources for later DDP requests.
1084 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1085 * struct scatterlist *sgl, unsigned int sgc);
1086 * Called when the FCoE Target wants to initialize an I/O that
1087 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1088 * perform necessary setup and returns 1 to indicate the device is set up
1089 * successfully to perform DDP on this I/O, otherwise this returns 0.
1091 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1092 * struct netdev_fcoe_hbainfo *hbainfo);
1093 * Called when the FCoE Protocol stack wants information on the underlying
1094 * device. This information is utilized by the FCoE protocol stack to
1095 * register attributes with Fiber Channel management service as per the
1096 * FC-GS Fabric Device Management Information(FDMI) specification.
1098 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1099 * Called when the underlying device wants to override default World Wide
1100 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1101 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1102 * protocol stack to use.
1105 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1106 * u16 rxq_index, u32 flow_id);
1107 * Set hardware filter for RFS. rxq_index is the target queue index;
1108 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1109 * Return the filter ID on success, or a negative error code.
1111 * Slave management functions (for bridge, bonding, etc).
1112 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1113 * Called to make another netdev an underling.
1115 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1116 * Called to release previously enslaved netdev.
1118 * Feature/offload setting functions.
1119 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1120 * netdev_features_t features);
1121 * Adjusts the requested feature flags according to device-specific
1122 * constraints, and returns the resulting flags. Must not modify
1125 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1126 * Called to update device configuration to new features. Passed
1127 * feature set might be less than what was returned by ndo_fix_features()).
1128 * Must return >0 or -errno if it changed dev->features itself.
1130 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1131 * struct net_device *dev,
1132 * const unsigned char *addr, u16 vid, u16 flags,
1133 * struct netlink_ext_ack *extack);
1134 * Adds an FDB entry to dev for addr.
1135 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1136 * struct net_device *dev,
1137 * const unsigned char *addr, u16 vid)
1138 * Deletes the FDB entry from dev coresponding to addr.
1139 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1140 * struct net_device *dev, struct net_device *filter_dev,
1142 * Used to add FDB entries to dump requests. Implementers should add
1143 * entries to skb and update idx with the number of entries.
1145 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1146 * u16 flags, struct netlink_ext_ack *extack)
1147 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1148 * struct net_device *dev, u32 filter_mask,
1150 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1153 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1154 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1155 * which do not represent real hardware may define this to allow their
1156 * userspace components to manage their virtual carrier state. Devices
1157 * that determine carrier state from physical hardware properties (eg
1158 * network cables) or protocol-dependent mechanisms (eg
1159 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1161 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1162 * struct netdev_phys_item_id *ppid);
1163 * Called to get ID of physical port of this device. If driver does
1164 * not implement this, it is assumed that the hw is not able to have
1165 * multiple net devices on single physical port.
1167 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1168 * struct netdev_phys_item_id *ppid)
1169 * Called to get the parent ID of the physical port of this device.
1171 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1172 * struct udp_tunnel_info *ti);
1173 * Called by UDP tunnel to notify a driver about the UDP port and socket
1174 * address family that a UDP tunnel is listnening to. It is called only
1175 * when a new port starts listening. The operation is protected by the
1178 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1179 * struct udp_tunnel_info *ti);
1180 * Called by UDP tunnel to notify the driver about a UDP port and socket
1181 * address family that the UDP tunnel is not listening to anymore. The
1182 * operation is protected by the RTNL.
1184 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1185 * struct net_device *dev)
1186 * Called by upper layer devices to accelerate switching or other
1187 * station functionality into hardware. 'pdev is the lowerdev
1188 * to use for the offload and 'dev' is the net device that will
1189 * back the offload. Returns a pointer to the private structure
1190 * the upper layer will maintain.
1191 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1192 * Called by upper layer device to delete the station created
1193 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1194 * the station and priv is the structure returned by the add
1196 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1197 * int queue_index, u32 maxrate);
1198 * Called when a user wants to set a max-rate limitation of specific
1200 * int (*ndo_get_iflink)(const struct net_device *dev);
1201 * Called to get the iflink value of this device.
1202 * void (*ndo_change_proto_down)(struct net_device *dev,
1204 * This function is used to pass protocol port error state information
1205 * to the switch driver. The switch driver can react to the proto_down
1206 * by doing a phys down on the associated switch port.
1207 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1208 * This function is used to get egress tunnel information for given skb.
1209 * This is useful for retrieving outer tunnel header parameters while
1211 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1212 * This function is used to specify the headroom that the skb must
1213 * consider when allocation skb during packet reception. Setting
1214 * appropriate rx headroom value allows avoiding skb head copy on
1215 * forward. Setting a negative value resets the rx headroom to the
1217 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1218 * This function is used to set or query state related to XDP on the
1219 * netdevice and manage BPF offload. See definition of
1220 * enum bpf_netdev_command for details.
1221 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1223 * This function is used to submit @n XDP packets for transmit on a
1224 * netdevice. Returns number of frames successfully transmitted, frames
1225 * that got dropped are freed/returned via xdp_return_frame().
1226 * Returns negative number, means general error invoking ndo, meaning
1227 * no frames were xmit'ed and core-caller will free all frames.
1228 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1229 * Get devlink port instance associated with a given netdev.
1230 * Called with a reference on the netdevice and devlink locks only,
1231 * rtnl_lock is not held.
1233 struct net_device_ops
{
1234 int (*ndo_init
)(struct net_device
*dev
);
1235 void (*ndo_uninit
)(struct net_device
*dev
);
1236 int (*ndo_open
)(struct net_device
*dev
);
1237 int (*ndo_stop
)(struct net_device
*dev
);
1238 netdev_tx_t (*ndo_start_xmit
)(struct sk_buff
*skb
,
1239 struct net_device
*dev
);
1240 netdev_features_t (*ndo_features_check
)(struct sk_buff
*skb
,
1241 struct net_device
*dev
,
1242 netdev_features_t features
);
1243 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1244 struct sk_buff
*skb
,
1245 struct net_device
*sb_dev
);
1246 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1248 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1249 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1251 int (*ndo_validate_addr
)(struct net_device
*dev
);
1252 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1253 struct ifreq
*ifr
, int cmd
);
1254 int (*ndo_set_config
)(struct net_device
*dev
,
1256 int (*ndo_change_mtu
)(struct net_device
*dev
,
1258 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1259 struct neigh_parms
*);
1260 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1262 void (*ndo_get_stats64
)(struct net_device
*dev
,
1263 struct rtnl_link_stats64
*storage
);
1264 bool (*ndo_has_offload_stats
)(const struct net_device
*dev
, int attr_id
);
1265 int (*ndo_get_offload_stats
)(int attr_id
,
1266 const struct net_device
*dev
,
1268 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1270 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1271 __be16 proto
, u16 vid
);
1272 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1273 __be16 proto
, u16 vid
);
1274 #ifdef CONFIG_NET_POLL_CONTROLLER
1275 void (*ndo_poll_controller
)(struct net_device
*dev
);
1276 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1277 struct netpoll_info
*info
);
1278 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1280 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1281 int queue
, u8
*mac
);
1282 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1283 int queue
, u16 vlan
,
1284 u8 qos
, __be16 proto
);
1285 int (*ndo_set_vf_rate
)(struct net_device
*dev
,
1286 int vf
, int min_tx_rate
,
1288 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1289 int vf
, bool setting
);
1290 int (*ndo_set_vf_trust
)(struct net_device
*dev
,
1291 int vf
, bool setting
);
1292 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1294 struct ifla_vf_info
*ivf
);
1295 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1296 int vf
, int link_state
);
1297 int (*ndo_get_vf_stats
)(struct net_device
*dev
,
1299 struct ifla_vf_stats
1301 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1303 struct nlattr
*port
[]);
1304 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1305 int vf
, struct sk_buff
*skb
);
1306 int (*ndo_set_vf_guid
)(struct net_device
*dev
,
1309 int (*ndo_set_vf_rss_query_en
)(
1310 struct net_device
*dev
,
1311 int vf
, bool setting
);
1312 int (*ndo_setup_tc
)(struct net_device
*dev
,
1313 enum tc_setup_type type
,
1315 #if IS_ENABLED(CONFIG_FCOE)
1316 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1317 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1318 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1320 struct scatterlist
*sgl
,
1322 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1324 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1326 struct scatterlist
*sgl
,
1328 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1329 struct netdev_fcoe_hbainfo
*hbainfo
);
1332 #if IS_ENABLED(CONFIG_LIBFCOE)
1333 #define NETDEV_FCOE_WWNN 0
1334 #define NETDEV_FCOE_WWPN 1
1335 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1336 u64
*wwn
, int type
);
1339 #ifdef CONFIG_RFS_ACCEL
1340 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1341 const struct sk_buff
*skb
,
1345 int (*ndo_add_slave
)(struct net_device
*dev
,
1346 struct net_device
*slave_dev
,
1347 struct netlink_ext_ack
*extack
);
1348 int (*ndo_del_slave
)(struct net_device
*dev
,
1349 struct net_device
*slave_dev
);
1350 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1351 netdev_features_t features
);
1352 int (*ndo_set_features
)(struct net_device
*dev
,
1353 netdev_features_t features
);
1354 int (*ndo_neigh_construct
)(struct net_device
*dev
,
1355 struct neighbour
*n
);
1356 void (*ndo_neigh_destroy
)(struct net_device
*dev
,
1357 struct neighbour
*n
);
1359 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1360 struct nlattr
*tb
[],
1361 struct net_device
*dev
,
1362 const unsigned char *addr
,
1365 struct netlink_ext_ack
*extack
);
1366 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1367 struct nlattr
*tb
[],
1368 struct net_device
*dev
,
1369 const unsigned char *addr
,
1371 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1372 struct netlink_callback
*cb
,
1373 struct net_device
*dev
,
1374 struct net_device
*filter_dev
,
1376 int (*ndo_fdb_get
)(struct sk_buff
*skb
,
1377 struct nlattr
*tb
[],
1378 struct net_device
*dev
,
1379 const unsigned char *addr
,
1380 u16 vid
, u32 portid
, u32 seq
,
1381 struct netlink_ext_ack
*extack
);
1382 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1383 struct nlmsghdr
*nlh
,
1385 struct netlink_ext_ack
*extack
);
1386 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1388 struct net_device
*dev
,
1391 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1392 struct nlmsghdr
*nlh
,
1394 int (*ndo_change_carrier
)(struct net_device
*dev
,
1396 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1397 struct netdev_phys_item_id
*ppid
);
1398 int (*ndo_get_port_parent_id
)(struct net_device
*dev
,
1399 struct netdev_phys_item_id
*ppid
);
1400 int (*ndo_get_phys_port_name
)(struct net_device
*dev
,
1401 char *name
, size_t len
);
1402 void (*ndo_udp_tunnel_add
)(struct net_device
*dev
,
1403 struct udp_tunnel_info
*ti
);
1404 void (*ndo_udp_tunnel_del
)(struct net_device
*dev
,
1405 struct udp_tunnel_info
*ti
);
1406 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1407 struct net_device
*dev
);
1408 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1411 int (*ndo_get_lock_subclass
)(struct net_device
*dev
);
1412 int (*ndo_set_tx_maxrate
)(struct net_device
*dev
,
1415 int (*ndo_get_iflink
)(const struct net_device
*dev
);
1416 int (*ndo_change_proto_down
)(struct net_device
*dev
,
1418 int (*ndo_fill_metadata_dst
)(struct net_device
*dev
,
1419 struct sk_buff
*skb
);
1420 void (*ndo_set_rx_headroom
)(struct net_device
*dev
,
1421 int needed_headroom
);
1422 int (*ndo_bpf
)(struct net_device
*dev
,
1423 struct netdev_bpf
*bpf
);
1424 int (*ndo_xdp_xmit
)(struct net_device
*dev
, int n
,
1425 struct xdp_frame
**xdp
,
1427 int (*ndo_xsk_async_xmit
)(struct net_device
*dev
,
1429 struct devlink_port
* (*ndo_get_devlink_port
)(struct net_device
*dev
);
1433 * enum net_device_priv_flags - &struct net_device priv_flags
1435 * These are the &struct net_device, they are only set internally
1436 * by drivers and used in the kernel. These flags are invisible to
1437 * userspace; this means that the order of these flags can change
1438 * during any kernel release.
1440 * You should have a pretty good reason to be extending these flags.
1442 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1443 * @IFF_EBRIDGE: Ethernet bridging device
1444 * @IFF_BONDING: bonding master or slave
1445 * @IFF_ISATAP: ISATAP interface (RFC4214)
1446 * @IFF_WAN_HDLC: WAN HDLC device
1447 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1449 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1450 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1451 * @IFF_MACVLAN_PORT: device used as macvlan port
1452 * @IFF_BRIDGE_PORT: device used as bridge port
1453 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1454 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1455 * @IFF_UNICAST_FLT: Supports unicast filtering
1456 * @IFF_TEAM_PORT: device used as team port
1457 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1458 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1459 * change when it's running
1460 * @IFF_MACVLAN: Macvlan device
1461 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1462 * underlying stacked devices
1463 * @IFF_L3MDEV_MASTER: device is an L3 master device
1464 * @IFF_NO_QUEUE: device can run without qdisc attached
1465 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1466 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1467 * @IFF_TEAM: device is a team device
1468 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1469 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1470 * entity (i.e. the master device for bridged veth)
1471 * @IFF_MACSEC: device is a MACsec device
1472 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1473 * @IFF_FAILOVER: device is a failover master device
1474 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1475 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1476 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1478 enum netdev_priv_flags
{
1479 IFF_802_1Q_VLAN
= 1<<0,
1483 IFF_WAN_HDLC
= 1<<4,
1484 IFF_XMIT_DST_RELEASE
= 1<<5,
1485 IFF_DONT_BRIDGE
= 1<<6,
1486 IFF_DISABLE_NETPOLL
= 1<<7,
1487 IFF_MACVLAN_PORT
= 1<<8,
1488 IFF_BRIDGE_PORT
= 1<<9,
1489 IFF_OVS_DATAPATH
= 1<<10,
1490 IFF_TX_SKB_SHARING
= 1<<11,
1491 IFF_UNICAST_FLT
= 1<<12,
1492 IFF_TEAM_PORT
= 1<<13,
1493 IFF_SUPP_NOFCS
= 1<<14,
1494 IFF_LIVE_ADDR_CHANGE
= 1<<15,
1495 IFF_MACVLAN
= 1<<16,
1496 IFF_XMIT_DST_RELEASE_PERM
= 1<<17,
1497 IFF_L3MDEV_MASTER
= 1<<18,
1498 IFF_NO_QUEUE
= 1<<19,
1499 IFF_OPENVSWITCH
= 1<<20,
1500 IFF_L3MDEV_SLAVE
= 1<<21,
1502 IFF_RXFH_CONFIGURED
= 1<<23,
1503 IFF_PHONY_HEADROOM
= 1<<24,
1505 IFF_NO_RX_HANDLER
= 1<<26,
1506 IFF_FAILOVER
= 1<<27,
1507 IFF_FAILOVER_SLAVE
= 1<<28,
1508 IFF_L3MDEV_RX_HANDLER
= 1<<29,
1509 IFF_LIVE_RENAME_OK
= 1<<30,
1512 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1513 #define IFF_EBRIDGE IFF_EBRIDGE
1514 #define IFF_BONDING IFF_BONDING
1515 #define IFF_ISATAP IFF_ISATAP
1516 #define IFF_WAN_HDLC IFF_WAN_HDLC
1517 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1518 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1519 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1520 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1521 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1522 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1523 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1524 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1525 #define IFF_TEAM_PORT IFF_TEAM_PORT
1526 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1527 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1528 #define IFF_MACVLAN IFF_MACVLAN
1529 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1530 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1531 #define IFF_NO_QUEUE IFF_NO_QUEUE
1532 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1533 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1534 #define IFF_TEAM IFF_TEAM
1535 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1536 #define IFF_MACSEC IFF_MACSEC
1537 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1538 #define IFF_FAILOVER IFF_FAILOVER
1539 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1540 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1541 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1544 * struct net_device - The DEVICE structure.
1546 * Actually, this whole structure is a big mistake. It mixes I/O
1547 * data with strictly "high-level" data, and it has to know about
1548 * almost every data structure used in the INET module.
1550 * @name: This is the first field of the "visible" part of this structure
1551 * (i.e. as seen by users in the "Space.c" file). It is the name
1554 * @name_hlist: Device name hash chain, please keep it close to name[]
1555 * @ifalias: SNMP alias
1556 * @mem_end: Shared memory end
1557 * @mem_start: Shared memory start
1558 * @base_addr: Device I/O address
1559 * @irq: Device IRQ number
1561 * @state: Generic network queuing layer state, see netdev_state_t
1562 * @dev_list: The global list of network devices
1563 * @napi_list: List entry used for polling NAPI devices
1564 * @unreg_list: List entry when we are unregistering the
1565 * device; see the function unregister_netdev
1566 * @close_list: List entry used when we are closing the device
1567 * @ptype_all: Device-specific packet handlers for all protocols
1568 * @ptype_specific: Device-specific, protocol-specific packet handlers
1570 * @adj_list: Directly linked devices, like slaves for bonding
1571 * @features: Currently active device features
1572 * @hw_features: User-changeable features
1574 * @wanted_features: User-requested features
1575 * @vlan_features: Mask of features inheritable by VLAN devices
1577 * @hw_enc_features: Mask of features inherited by encapsulating devices
1578 * This field indicates what encapsulation
1579 * offloads the hardware is capable of doing,
1580 * and drivers will need to set them appropriately.
1582 * @mpls_features: Mask of features inheritable by MPLS
1584 * @ifindex: interface index
1585 * @group: The group the device belongs to
1587 * @stats: Statistics struct, which was left as a legacy, use
1588 * rtnl_link_stats64 instead
1590 * @rx_dropped: Dropped packets by core network,
1591 * do not use this in drivers
1592 * @tx_dropped: Dropped packets by core network,
1593 * do not use this in drivers
1594 * @rx_nohandler: nohandler dropped packets by core network on
1595 * inactive devices, do not use this in drivers
1596 * @carrier_up_count: Number of times the carrier has been up
1597 * @carrier_down_count: Number of times the carrier has been down
1599 * @wireless_handlers: List of functions to handle Wireless Extensions,
1601 * see <net/iw_handler.h> for details.
1602 * @wireless_data: Instance data managed by the core of wireless extensions
1604 * @netdev_ops: Includes several pointers to callbacks,
1605 * if one wants to override the ndo_*() functions
1606 * @ethtool_ops: Management operations
1607 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1608 * discovery handling. Necessary for e.g. 6LoWPAN.
1609 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1610 * of Layer 2 headers.
1612 * @flags: Interface flags (a la BSD)
1613 * @priv_flags: Like 'flags' but invisible to userspace,
1614 * see if.h for the definitions
1615 * @gflags: Global flags ( kept as legacy )
1616 * @padded: How much padding added by alloc_netdev()
1617 * @operstate: RFC2863 operstate
1618 * @link_mode: Mapping policy to operstate
1619 * @if_port: Selectable AUI, TP, ...
1621 * @mtu: Interface MTU value
1622 * @min_mtu: Interface Minimum MTU value
1623 * @max_mtu: Interface Maximum MTU value
1624 * @type: Interface hardware type
1625 * @hard_header_len: Maximum hardware header length.
1626 * @min_header_len: Minimum hardware header length
1628 * @needed_headroom: Extra headroom the hardware may need, but not in all
1629 * cases can this be guaranteed
1630 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1631 * cases can this be guaranteed. Some cases also use
1632 * LL_MAX_HEADER instead to allocate the skb
1634 * interface address info:
1636 * @perm_addr: Permanent hw address
1637 * @addr_assign_type: Hw address assignment type
1638 * @addr_len: Hardware address length
1639 * @neigh_priv_len: Used in neigh_alloc()
1640 * @dev_id: Used to differentiate devices that share
1641 * the same link layer address
1642 * @dev_port: Used to differentiate devices that share
1644 * @addr_list_lock: XXX: need comments on this one
1645 * @uc_promisc: Counter that indicates promiscuous mode
1646 * has been enabled due to the need to listen to
1647 * additional unicast addresses in a device that
1648 * does not implement ndo_set_rx_mode()
1649 * @uc: unicast mac addresses
1650 * @mc: multicast mac addresses
1651 * @dev_addrs: list of device hw addresses
1652 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1653 * @promiscuity: Number of times the NIC is told to work in
1654 * promiscuous mode; if it becomes 0 the NIC will
1655 * exit promiscuous mode
1656 * @allmulti: Counter, enables or disables allmulticast mode
1658 * @vlan_info: VLAN info
1659 * @dsa_ptr: dsa specific data
1660 * @tipc_ptr: TIPC specific data
1661 * @atalk_ptr: AppleTalk link
1662 * @ip_ptr: IPv4 specific data
1663 * @dn_ptr: DECnet specific data
1664 * @ip6_ptr: IPv6 specific data
1665 * @ax25_ptr: AX.25 specific data
1666 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1668 * @dev_addr: Hw address (before bcast,
1669 * because most packets are unicast)
1671 * @_rx: Array of RX queues
1672 * @num_rx_queues: Number of RX queues
1673 * allocated at register_netdev() time
1674 * @real_num_rx_queues: Number of RX queues currently active in device
1676 * @rx_handler: handler for received packets
1677 * @rx_handler_data: XXX: need comments on this one
1678 * @miniq_ingress: ingress/clsact qdisc specific data for
1679 * ingress processing
1680 * @ingress_queue: XXX: need comments on this one
1681 * @broadcast: hw bcast address
1683 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1684 * indexed by RX queue number. Assigned by driver.
1685 * This must only be set if the ndo_rx_flow_steer
1686 * operation is defined
1687 * @index_hlist: Device index hash chain
1689 * @_tx: Array of TX queues
1690 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1691 * @real_num_tx_queues: Number of TX queues currently active in device
1692 * @qdisc: Root qdisc from userspace point of view
1693 * @tx_queue_len: Max frames per queue allowed
1694 * @tx_global_lock: XXX: need comments on this one
1696 * @xps_maps: XXX: need comments on this one
1697 * @miniq_egress: clsact qdisc specific data for
1699 * @watchdog_timeo: Represents the timeout that is used by
1700 * the watchdog (see dev_watchdog())
1701 * @watchdog_timer: List of timers
1703 * @pcpu_refcnt: Number of references to this device
1704 * @todo_list: Delayed register/unregister
1705 * @link_watch_list: XXX: need comments on this one
1707 * @reg_state: Register/unregister state machine
1708 * @dismantle: Device is going to be freed
1709 * @rtnl_link_state: This enum represents the phases of creating
1712 * @needs_free_netdev: Should unregister perform free_netdev?
1713 * @priv_destructor: Called from unregister
1714 * @npinfo: XXX: need comments on this one
1715 * @nd_net: Network namespace this network device is inside
1717 * @ml_priv: Mid-layer private
1718 * @lstats: Loopback statistics
1719 * @tstats: Tunnel statistics
1720 * @dstats: Dummy statistics
1721 * @vstats: Virtual ethernet statistics
1726 * @dev: Class/net/name entry
1727 * @sysfs_groups: Space for optional device, statistics and wireless
1730 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1731 * @rtnl_link_ops: Rtnl_link_ops
1733 * @gso_max_size: Maximum size of generic segmentation offload
1734 * @gso_max_segs: Maximum number of segments that can be passed to the
1737 * @dcbnl_ops: Data Center Bridging netlink ops
1738 * @num_tc: Number of traffic classes in the net device
1739 * @tc_to_txq: XXX: need comments on this one
1740 * @prio_tc_map: XXX: need comments on this one
1742 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1744 * @priomap: XXX: need comments on this one
1745 * @phydev: Physical device may attach itself
1746 * for hardware timestamping
1747 * @sfp_bus: attached &struct sfp_bus structure.
1749 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1750 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1752 * @proto_down: protocol port state information can be sent to the
1753 * switch driver and used to set the phys state of the
1756 * @wol_enabled: Wake-on-LAN is enabled
1758 * FIXME: cleanup struct net_device such that network protocol info
1763 char name
[IFNAMSIZ
];
1764 struct hlist_node name_hlist
;
1765 struct dev_ifalias __rcu
*ifalias
;
1767 * I/O specific fields
1768 * FIXME: Merge these and struct ifmap into one
1770 unsigned long mem_end
;
1771 unsigned long mem_start
;
1772 unsigned long base_addr
;
1776 * Some hardware also needs these fields (state,dev_list,
1777 * napi_list,unreg_list,close_list) but they are not
1778 * part of the usual set specified in Space.c.
1781 unsigned long state
;
1783 struct list_head dev_list
;
1784 struct list_head napi_list
;
1785 struct list_head unreg_list
;
1786 struct list_head close_list
;
1787 struct list_head ptype_all
;
1788 struct list_head ptype_specific
;
1791 struct list_head upper
;
1792 struct list_head lower
;
1795 netdev_features_t features
;
1796 netdev_features_t hw_features
;
1797 netdev_features_t wanted_features
;
1798 netdev_features_t vlan_features
;
1799 netdev_features_t hw_enc_features
;
1800 netdev_features_t mpls_features
;
1801 netdev_features_t gso_partial_features
;
1806 struct net_device_stats stats
;
1808 atomic_long_t rx_dropped
;
1809 atomic_long_t tx_dropped
;
1810 atomic_long_t rx_nohandler
;
1812 /* Stats to monitor link on/off, flapping */
1813 atomic_t carrier_up_count
;
1814 atomic_t carrier_down_count
;
1816 #ifdef CONFIG_WIRELESS_EXT
1817 const struct iw_handler_def
*wireless_handlers
;
1818 struct iw_public_data
*wireless_data
;
1820 const struct net_device_ops
*netdev_ops
;
1821 const struct ethtool_ops
*ethtool_ops
;
1822 #ifdef CONFIG_NET_L3_MASTER_DEV
1823 const struct l3mdev_ops
*l3mdev_ops
;
1825 #if IS_ENABLED(CONFIG_IPV6)
1826 const struct ndisc_ops
*ndisc_ops
;
1829 #ifdef CONFIG_XFRM_OFFLOAD
1830 const struct xfrmdev_ops
*xfrmdev_ops
;
1833 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1834 const struct tlsdev_ops
*tlsdev_ops
;
1837 const struct header_ops
*header_ops
;
1840 unsigned int priv_flags
;
1842 unsigned short gflags
;
1843 unsigned short padded
;
1845 unsigned char operstate
;
1846 unsigned char link_mode
;
1848 unsigned char if_port
;
1852 unsigned int min_mtu
;
1853 unsigned int max_mtu
;
1854 unsigned short type
;
1855 unsigned short hard_header_len
;
1856 unsigned char min_header_len
;
1858 unsigned short needed_headroom
;
1859 unsigned short needed_tailroom
;
1861 /* Interface address info. */
1862 unsigned char perm_addr
[MAX_ADDR_LEN
];
1863 unsigned char addr_assign_type
;
1864 unsigned char addr_len
;
1865 unsigned short neigh_priv_len
;
1866 unsigned short dev_id
;
1867 unsigned short dev_port
;
1868 spinlock_t addr_list_lock
;
1869 unsigned char name_assign_type
;
1871 struct netdev_hw_addr_list uc
;
1872 struct netdev_hw_addr_list mc
;
1873 struct netdev_hw_addr_list dev_addrs
;
1876 struct kset
*queues_kset
;
1878 unsigned int promiscuity
;
1879 unsigned int allmulti
;
1882 /* Protocol-specific pointers */
1884 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1885 struct vlan_info __rcu
*vlan_info
;
1887 #if IS_ENABLED(CONFIG_NET_DSA)
1888 struct dsa_port
*dsa_ptr
;
1890 #if IS_ENABLED(CONFIG_TIPC)
1891 struct tipc_bearer __rcu
*tipc_ptr
;
1893 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1896 struct in_device __rcu
*ip_ptr
;
1897 #if IS_ENABLED(CONFIG_DECNET)
1898 struct dn_dev __rcu
*dn_ptr
;
1900 struct inet6_dev __rcu
*ip6_ptr
;
1901 #if IS_ENABLED(CONFIG_AX25)
1904 struct wireless_dev
*ieee80211_ptr
;
1905 struct wpan_dev
*ieee802154_ptr
;
1906 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1907 struct mpls_dev __rcu
*mpls_ptr
;
1911 * Cache lines mostly used on receive path (including eth_type_trans())
1913 /* Interface address info used in eth_type_trans() */
1914 unsigned char *dev_addr
;
1916 struct netdev_rx_queue
*_rx
;
1917 unsigned int num_rx_queues
;
1918 unsigned int real_num_rx_queues
;
1920 struct bpf_prog __rcu
*xdp_prog
;
1921 unsigned long gro_flush_timeout
;
1922 rx_handler_func_t __rcu
*rx_handler
;
1923 void __rcu
*rx_handler_data
;
1925 #ifdef CONFIG_NET_CLS_ACT
1926 struct mini_Qdisc __rcu
*miniq_ingress
;
1928 struct netdev_queue __rcu
*ingress_queue
;
1929 #ifdef CONFIG_NETFILTER_INGRESS
1930 struct nf_hook_entries __rcu
*nf_hooks_ingress
;
1933 unsigned char broadcast
[MAX_ADDR_LEN
];
1934 #ifdef CONFIG_RFS_ACCEL
1935 struct cpu_rmap
*rx_cpu_rmap
;
1937 struct hlist_node index_hlist
;
1940 * Cache lines mostly used on transmit path
1942 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1943 unsigned int num_tx_queues
;
1944 unsigned int real_num_tx_queues
;
1945 struct Qdisc
*qdisc
;
1946 #ifdef CONFIG_NET_SCHED
1947 DECLARE_HASHTABLE (qdisc_hash
, 4);
1949 unsigned int tx_queue_len
;
1950 spinlock_t tx_global_lock
;
1954 struct xps_dev_maps __rcu
*xps_cpus_map
;
1955 struct xps_dev_maps __rcu
*xps_rxqs_map
;
1957 #ifdef CONFIG_NET_CLS_ACT
1958 struct mini_Qdisc __rcu
*miniq_egress
;
1961 /* These may be needed for future network-power-down code. */
1962 struct timer_list watchdog_timer
;
1964 int __percpu
*pcpu_refcnt
;
1965 struct list_head todo_list
;
1967 struct list_head link_watch_list
;
1969 enum { NETREG_UNINITIALIZED
=0,
1970 NETREG_REGISTERED
, /* completed register_netdevice */
1971 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1972 NETREG_UNREGISTERED
, /* completed unregister todo */
1973 NETREG_RELEASED
, /* called free_netdev */
1974 NETREG_DUMMY
, /* dummy device for NAPI poll */
1980 RTNL_LINK_INITIALIZED
,
1981 RTNL_LINK_INITIALIZING
,
1982 } rtnl_link_state
:16;
1984 bool needs_free_netdev
;
1985 void (*priv_destructor
)(struct net_device
*dev
);
1987 #ifdef CONFIG_NETPOLL
1988 struct netpoll_info __rcu
*npinfo
;
1991 possible_net_t nd_net
;
1993 /* mid-layer private */
1996 struct pcpu_lstats __percpu
*lstats
;
1997 struct pcpu_sw_netstats __percpu
*tstats
;
1998 struct pcpu_dstats __percpu
*dstats
;
2001 #if IS_ENABLED(CONFIG_GARP)
2002 struct garp_port __rcu
*garp_port
;
2004 #if IS_ENABLED(CONFIG_MRP)
2005 struct mrp_port __rcu
*mrp_port
;
2009 const struct attribute_group
*sysfs_groups
[4];
2010 const struct attribute_group
*sysfs_rx_queue_group
;
2012 const struct rtnl_link_ops
*rtnl_link_ops
;
2014 /* for setting kernel sock attribute on TCP connection setup */
2015 #define GSO_MAX_SIZE 65536
2016 unsigned int gso_max_size
;
2017 #define GSO_MAX_SEGS 65535
2021 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
2024 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
2025 u8 prio_tc_map
[TC_BITMASK
+ 1];
2027 #if IS_ENABLED(CONFIG_FCOE)
2028 unsigned int fcoe_ddp_xid
;
2030 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2031 struct netprio_map __rcu
*priomap
;
2033 struct phy_device
*phydev
;
2034 struct sfp_bus
*sfp_bus
;
2035 struct lock_class_key
*qdisc_tx_busylock
;
2036 struct lock_class_key
*qdisc_running_key
;
2038 unsigned wol_enabled
:1;
2040 #define to_net_dev(d) container_of(d, struct net_device, dev)
2042 static inline bool netif_elide_gro(const struct net_device
*dev
)
2044 if (!(dev
->features
& NETIF_F_GRO
) || dev
->xdp_prog
)
2049 #define NETDEV_ALIGN 32
2052 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
2054 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
2058 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
2060 if (tc
>= dev
->num_tc
)
2063 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
2067 int netdev_txq_to_tc(struct net_device
*dev
, unsigned int txq
);
2068 void netdev_reset_tc(struct net_device
*dev
);
2069 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
);
2070 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
);
2073 int netdev_get_num_tc(struct net_device
*dev
)
2078 void netdev_unbind_sb_channel(struct net_device
*dev
,
2079 struct net_device
*sb_dev
);
2080 int netdev_bind_sb_channel_queue(struct net_device
*dev
,
2081 struct net_device
*sb_dev
,
2082 u8 tc
, u16 count
, u16 offset
);
2083 int netdev_set_sb_channel(struct net_device
*dev
, u16 channel
);
2084 static inline int netdev_get_sb_channel(struct net_device
*dev
)
2086 return max_t(int, -dev
->num_tc
, 0);
2090 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
2093 return &dev
->_tx
[index
];
2096 static inline struct netdev_queue
*skb_get_tx_queue(const struct net_device
*dev
,
2097 const struct sk_buff
*skb
)
2099 return netdev_get_tx_queue(dev
, skb_get_queue_mapping(skb
));
2102 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
2103 void (*f
)(struct net_device
*,
2104 struct netdev_queue
*,
2110 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2111 f(dev
, &dev
->_tx
[i
], arg
);
2114 #define netdev_lockdep_set_classes(dev) \
2116 static struct lock_class_key qdisc_tx_busylock_key; \
2117 static struct lock_class_key qdisc_running_key; \
2118 static struct lock_class_key qdisc_xmit_lock_key; \
2119 static struct lock_class_key dev_addr_list_lock_key; \
2122 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2123 (dev)->qdisc_running_key = &qdisc_running_key; \
2124 lockdep_set_class(&(dev)->addr_list_lock, \
2125 &dev_addr_list_lock_key); \
2126 for (i = 0; i < (dev)->num_tx_queues; i++) \
2127 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2128 &qdisc_xmit_lock_key); \
2131 u16
netdev_pick_tx(struct net_device
*dev
, struct sk_buff
*skb
,
2132 struct net_device
*sb_dev
);
2133 struct netdev_queue
*netdev_core_pick_tx(struct net_device
*dev
,
2134 struct sk_buff
*skb
,
2135 struct net_device
*sb_dev
);
2137 /* returns the headroom that the master device needs to take in account
2138 * when forwarding to this dev
2140 static inline unsigned netdev_get_fwd_headroom(struct net_device
*dev
)
2142 return dev
->priv_flags
& IFF_PHONY_HEADROOM
? 0 : dev
->needed_headroom
;
2145 static inline void netdev_set_rx_headroom(struct net_device
*dev
, int new_hr
)
2147 if (dev
->netdev_ops
->ndo_set_rx_headroom
)
2148 dev
->netdev_ops
->ndo_set_rx_headroom(dev
, new_hr
);
2151 /* set the device rx headroom to the dev's default */
2152 static inline void netdev_reset_rx_headroom(struct net_device
*dev
)
2154 netdev_set_rx_headroom(dev
, -1);
2158 * Net namespace inlines
2161 struct net
*dev_net(const struct net_device
*dev
)
2163 return read_pnet(&dev
->nd_net
);
2167 void dev_net_set(struct net_device
*dev
, struct net
*net
)
2169 write_pnet(&dev
->nd_net
, net
);
2173 * netdev_priv - access network device private data
2174 * @dev: network device
2176 * Get network device private data
2178 static inline void *netdev_priv(const struct net_device
*dev
)
2180 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
2183 /* Set the sysfs physical device reference for the network logical device
2184 * if set prior to registration will cause a symlink during initialization.
2186 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2188 /* Set the sysfs device type for the network logical device to allow
2189 * fine-grained identification of different network device types. For
2190 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2192 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2194 /* Default NAPI poll() weight
2195 * Device drivers are strongly advised to not use bigger value
2197 #define NAPI_POLL_WEIGHT 64
2200 * netif_napi_add - initialize a NAPI context
2201 * @dev: network device
2202 * @napi: NAPI context
2203 * @poll: polling function
2204 * @weight: default weight
2206 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2207 * *any* of the other NAPI-related functions.
2209 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
2210 int (*poll
)(struct napi_struct
*, int), int weight
);
2213 * netif_tx_napi_add - initialize a NAPI context
2214 * @dev: network device
2215 * @napi: NAPI context
2216 * @poll: polling function
2217 * @weight: default weight
2219 * This variant of netif_napi_add() should be used from drivers using NAPI
2220 * to exclusively poll a TX queue.
2221 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2223 static inline void netif_tx_napi_add(struct net_device
*dev
,
2224 struct napi_struct
*napi
,
2225 int (*poll
)(struct napi_struct
*, int),
2228 set_bit(NAPI_STATE_NO_BUSY_POLL
, &napi
->state
);
2229 netif_napi_add(dev
, napi
, poll
, weight
);
2233 * netif_napi_del - remove a NAPI context
2234 * @napi: NAPI context
2236 * netif_napi_del() removes a NAPI context from the network device NAPI list
2238 void netif_napi_del(struct napi_struct
*napi
);
2240 struct napi_gro_cb
{
2241 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2244 /* Length of frag0. */
2245 unsigned int frag0_len
;
2247 /* This indicates where we are processing relative to skb->data. */
2250 /* This is non-zero if the packet cannot be merged with the new skb. */
2253 /* Save the IP ID here and check when we get to the transport layer */
2256 /* Number of segments aggregated. */
2259 /* Start offset for remote checksum offload */
2260 u16 gro_remcsum_start
;
2262 /* jiffies when first packet was created/queued */
2265 /* Used in ipv6_gro_receive() and foo-over-udp */
2268 /* This is non-zero if the packet may be of the same flow. */
2271 /* Used in tunnel GRO receive */
2274 /* GRO checksum is valid */
2277 /* Number of checksums via CHECKSUM_UNNECESSARY */
2282 #define NAPI_GRO_FREE 1
2283 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2285 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2288 /* Used in GRE, set in fou/gue_gro_receive */
2291 /* Used to determine if flush_id can be ignored */
2294 /* Number of gro_receive callbacks this packet already went through */
2295 u8 recursion_counter
:4;
2299 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2302 /* used in skb_gro_receive() slow path */
2303 struct sk_buff
*last
;
2306 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2308 #define GRO_RECURSION_LIMIT 15
2309 static inline int gro_recursion_inc_test(struct sk_buff
*skb
)
2311 return ++NAPI_GRO_CB(skb
)->recursion_counter
== GRO_RECURSION_LIMIT
;
2314 typedef struct sk_buff
*(*gro_receive_t
)(struct list_head
*, struct sk_buff
*);
2315 static inline struct sk_buff
*call_gro_receive(gro_receive_t cb
,
2316 struct list_head
*head
,
2317 struct sk_buff
*skb
)
2319 if (unlikely(gro_recursion_inc_test(skb
))) {
2320 NAPI_GRO_CB(skb
)->flush
|= 1;
2324 return cb(head
, skb
);
2327 typedef struct sk_buff
*(*gro_receive_sk_t
)(struct sock
*, struct list_head
*,
2329 static inline struct sk_buff
*call_gro_receive_sk(gro_receive_sk_t cb
,
2331 struct list_head
*head
,
2332 struct sk_buff
*skb
)
2334 if (unlikely(gro_recursion_inc_test(skb
))) {
2335 NAPI_GRO_CB(skb
)->flush
|= 1;
2339 return cb(sk
, head
, skb
);
2342 struct packet_type
{
2343 __be16 type
; /* This is really htons(ether_type). */
2344 bool ignore_outgoing
;
2345 struct net_device
*dev
; /* NULL is wildcarded here */
2346 int (*func
) (struct sk_buff
*,
2347 struct net_device
*,
2348 struct packet_type
*,
2349 struct net_device
*);
2350 void (*list_func
) (struct list_head
*,
2351 struct packet_type
*,
2352 struct net_device
*);
2353 bool (*id_match
)(struct packet_type
*ptype
,
2355 void *af_packet_priv
;
2356 struct list_head list
;
2359 struct offload_callbacks
{
2360 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
2361 netdev_features_t features
);
2362 struct sk_buff
*(*gro_receive
)(struct list_head
*head
,
2363 struct sk_buff
*skb
);
2364 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
2367 struct packet_offload
{
2368 __be16 type
; /* This is really htons(ether_type). */
2370 struct offload_callbacks callbacks
;
2371 struct list_head list
;
2374 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2375 struct pcpu_sw_netstats
{
2380 struct u64_stats_sync syncp
;
2381 } __aligned(4 * sizeof(u64
));
2383 struct pcpu_lstats
{
2386 struct u64_stats_sync syncp
;
2387 } __aligned(2 * sizeof(u64
));
2389 #define __netdev_alloc_pcpu_stats(type, gfp) \
2391 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2394 for_each_possible_cpu(__cpu) { \
2395 typeof(type) *stat; \
2396 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2397 u64_stats_init(&stat->syncp); \
2403 #define netdev_alloc_pcpu_stats(type) \
2404 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2406 enum netdev_lag_tx_type
{
2407 NETDEV_LAG_TX_TYPE_UNKNOWN
,
2408 NETDEV_LAG_TX_TYPE_RANDOM
,
2409 NETDEV_LAG_TX_TYPE_BROADCAST
,
2410 NETDEV_LAG_TX_TYPE_ROUNDROBIN
,
2411 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
,
2412 NETDEV_LAG_TX_TYPE_HASH
,
2415 enum netdev_lag_hash
{
2416 NETDEV_LAG_HASH_NONE
,
2418 NETDEV_LAG_HASH_L34
,
2419 NETDEV_LAG_HASH_L23
,
2420 NETDEV_LAG_HASH_E23
,
2421 NETDEV_LAG_HASH_E34
,
2422 NETDEV_LAG_HASH_UNKNOWN
,
2425 struct netdev_lag_upper_info
{
2426 enum netdev_lag_tx_type tx_type
;
2427 enum netdev_lag_hash hash_type
;
2430 struct netdev_lag_lower_state_info
{
2435 #include <linux/notifier.h>
2437 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2438 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2442 NETDEV_UP
= 1, /* For now you can't veto a device up/down */
2444 NETDEV_REBOOT
, /* Tell a protocol stack a network interface
2445 detected a hardware crash and restarted
2446 - we can use this eg to kick tcp sessions
2448 NETDEV_CHANGE
, /* Notify device state change */
2451 NETDEV_CHANGEMTU
, /* notify after mtu change happened */
2452 NETDEV_CHANGEADDR
, /* notify after the address change */
2453 NETDEV_PRE_CHANGEADDR
, /* notify before the address change */
2457 NETDEV_BONDING_FAILOVER
,
2459 NETDEV_PRE_TYPE_CHANGE
,
2460 NETDEV_POST_TYPE_CHANGE
,
2463 NETDEV_NOTIFY_PEERS
,
2467 NETDEV_PRECHANGEMTU
, /* notify before mtu change happened */
2468 NETDEV_CHANGEINFODATA
,
2469 NETDEV_BONDING_INFO
,
2470 NETDEV_PRECHANGEUPPER
,
2471 NETDEV_CHANGELOWERSTATE
,
2472 NETDEV_UDP_TUNNEL_PUSH_INFO
,
2473 NETDEV_UDP_TUNNEL_DROP_INFO
,
2474 NETDEV_CHANGE_TX_QUEUE_LEN
,
2475 NETDEV_CVLAN_FILTER_PUSH_INFO
,
2476 NETDEV_CVLAN_FILTER_DROP_INFO
,
2477 NETDEV_SVLAN_FILTER_PUSH_INFO
,
2478 NETDEV_SVLAN_FILTER_DROP_INFO
,
2480 const char *netdev_cmd_to_name(enum netdev_cmd cmd
);
2482 int register_netdevice_notifier(struct notifier_block
*nb
);
2483 int unregister_netdevice_notifier(struct notifier_block
*nb
);
2485 struct netdev_notifier_info
{
2486 struct net_device
*dev
;
2487 struct netlink_ext_ack
*extack
;
2490 struct netdev_notifier_info_ext
{
2491 struct netdev_notifier_info info
; /* must be first */
2497 struct netdev_notifier_change_info
{
2498 struct netdev_notifier_info info
; /* must be first */
2499 unsigned int flags_changed
;
2502 struct netdev_notifier_changeupper_info
{
2503 struct netdev_notifier_info info
; /* must be first */
2504 struct net_device
*upper_dev
; /* new upper dev */
2505 bool master
; /* is upper dev master */
2506 bool linking
; /* is the notification for link or unlink */
2507 void *upper_info
; /* upper dev info */
2510 struct netdev_notifier_changelowerstate_info
{
2511 struct netdev_notifier_info info
; /* must be first */
2512 void *lower_state_info
; /* is lower dev state */
2515 struct netdev_notifier_pre_changeaddr_info
{
2516 struct netdev_notifier_info info
; /* must be first */
2517 const unsigned char *dev_addr
;
2520 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
2521 struct net_device
*dev
)
2524 info
->extack
= NULL
;
2527 static inline struct net_device
*
2528 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
2533 static inline struct netlink_ext_ack
*
2534 netdev_notifier_info_to_extack(const struct netdev_notifier_info
*info
)
2536 return info
->extack
;
2539 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
2542 extern rwlock_t dev_base_lock
; /* Device list lock */
2544 #define for_each_netdev(net, d) \
2545 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2546 #define for_each_netdev_reverse(net, d) \
2547 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2548 #define for_each_netdev_rcu(net, d) \
2549 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2550 #define for_each_netdev_safe(net, d, n) \
2551 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2552 #define for_each_netdev_continue(net, d) \
2553 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2554 #define for_each_netdev_continue_rcu(net, d) \
2555 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2556 #define for_each_netdev_in_bond_rcu(bond, slave) \
2557 for_each_netdev_rcu(&init_net, slave) \
2558 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2559 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2561 static inline struct net_device
*next_net_device(struct net_device
*dev
)
2563 struct list_head
*lh
;
2567 lh
= dev
->dev_list
.next
;
2568 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2571 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
2573 struct list_head
*lh
;
2577 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
2578 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2581 static inline struct net_device
*first_net_device(struct net
*net
)
2583 return list_empty(&net
->dev_base_head
) ? NULL
:
2584 net_device_entry(net
->dev_base_head
.next
);
2587 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
2589 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
2591 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2594 int netdev_boot_setup_check(struct net_device
*dev
);
2595 unsigned long netdev_boot_base(const char *prefix
, int unit
);
2596 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
2597 const char *hwaddr
);
2598 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2599 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2600 void dev_add_pack(struct packet_type
*pt
);
2601 void dev_remove_pack(struct packet_type
*pt
);
2602 void __dev_remove_pack(struct packet_type
*pt
);
2603 void dev_add_offload(struct packet_offload
*po
);
2604 void dev_remove_offload(struct packet_offload
*po
);
2606 int dev_get_iflink(const struct net_device
*dev
);
2607 int dev_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
);
2608 struct net_device
*__dev_get_by_flags(struct net
*net
, unsigned short flags
,
2609 unsigned short mask
);
2610 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
2611 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
2612 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
2613 int dev_alloc_name(struct net_device
*dev
, const char *name
);
2614 int dev_open(struct net_device
*dev
, struct netlink_ext_ack
*extack
);
2615 void dev_close(struct net_device
*dev
);
2616 void dev_close_many(struct list_head
*head
, bool unlink
);
2617 void dev_disable_lro(struct net_device
*dev
);
2618 int dev_loopback_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*newskb
);
2619 u16
dev_pick_tx_zero(struct net_device
*dev
, struct sk_buff
*skb
,
2620 struct net_device
*sb_dev
);
2621 u16
dev_pick_tx_cpu_id(struct net_device
*dev
, struct sk_buff
*skb
,
2622 struct net_device
*sb_dev
);
2623 int dev_queue_xmit(struct sk_buff
*skb
);
2624 int dev_queue_xmit_accel(struct sk_buff
*skb
, struct net_device
*sb_dev
);
2625 int dev_direct_xmit(struct sk_buff
*skb
, u16 queue_id
);
2626 int register_netdevice(struct net_device
*dev
);
2627 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
2628 void unregister_netdevice_many(struct list_head
*head
);
2629 static inline void unregister_netdevice(struct net_device
*dev
)
2631 unregister_netdevice_queue(dev
, NULL
);
2634 int netdev_refcnt_read(const struct net_device
*dev
);
2635 void free_netdev(struct net_device
*dev
);
2636 void netdev_freemem(struct net_device
*dev
);
2637 void synchronize_net(void);
2638 int init_dummy_netdev(struct net_device
*dev
);
2640 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
2641 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
2642 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
2643 struct net_device
*dev_get_by_napi_id(unsigned int napi_id
);
2644 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
2645 int dev_restart(struct net_device
*dev
);
2646 int skb_gro_receive(struct sk_buff
*p
, struct sk_buff
*skb
);
2648 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
2650 return NAPI_GRO_CB(skb
)->data_offset
;
2653 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
2655 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
2658 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
2660 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2663 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2664 unsigned int offset
)
2666 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2669 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2671 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2674 static inline void skb_gro_frag0_invalidate(struct sk_buff
*skb
)
2676 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2677 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2680 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2681 unsigned int offset
)
2683 if (!pskb_may_pull(skb
, hlen
))
2686 skb_gro_frag0_invalidate(skb
);
2687 return skb
->data
+ offset
;
2690 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2692 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2693 skb_network_offset(skb
);
2696 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2697 const void *start
, unsigned int len
)
2699 if (NAPI_GRO_CB(skb
)->csum_valid
)
2700 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2701 csum_partial(start
, len
, 0));
2704 /* GRO checksum functions. These are logical equivalents of the normal
2705 * checksum functions (in skbuff.h) except that they operate on the GRO
2706 * offsets and fields in sk_buff.
2709 __sum16
__skb_gro_checksum_complete(struct sk_buff
*skb
);
2711 static inline bool skb_at_gro_remcsum_start(struct sk_buff
*skb
)
2713 return (NAPI_GRO_CB(skb
)->gro_remcsum_start
== skb_gro_offset(skb
));
2716 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff
*skb
,
2720 return ((skb
->ip_summed
!= CHECKSUM_PARTIAL
||
2721 skb_checksum_start_offset(skb
) <
2722 skb_gro_offset(skb
)) &&
2723 !skb_at_gro_remcsum_start(skb
) &&
2724 NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2725 (!zero_okay
|| check
));
2728 static inline __sum16
__skb_gro_checksum_validate_complete(struct sk_buff
*skb
,
2731 if (NAPI_GRO_CB(skb
)->csum_valid
&&
2732 !csum_fold(csum_add(psum
, NAPI_GRO_CB(skb
)->csum
)))
2735 NAPI_GRO_CB(skb
)->csum
= psum
;
2737 return __skb_gro_checksum_complete(skb
);
2740 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff
*skb
)
2742 if (NAPI_GRO_CB(skb
)->csum_cnt
> 0) {
2743 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2744 NAPI_GRO_CB(skb
)->csum_cnt
--;
2746 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2747 * verified a new top level checksum or an encapsulated one
2748 * during GRO. This saves work if we fallback to normal path.
2750 __skb_incr_checksum_unnecessary(skb
);
2754 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2757 __sum16 __ret = 0; \
2758 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2759 __ret = __skb_gro_checksum_validate_complete(skb, \
2760 compute_pseudo(skb, proto)); \
2762 skb_gro_incr_csum_unnecessary(skb); \
2766 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2767 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2769 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2771 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2773 #define skb_gro_checksum_simple_validate(skb) \
2774 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2776 static inline bool __skb_gro_checksum_convert_check(struct sk_buff
*skb
)
2778 return (NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2779 !NAPI_GRO_CB(skb
)->csum_valid
);
2782 static inline void __skb_gro_checksum_convert(struct sk_buff
*skb
,
2783 __sum16 check
, __wsum pseudo
)
2785 NAPI_GRO_CB(skb
)->csum
= ~pseudo
;
2786 NAPI_GRO_CB(skb
)->csum_valid
= 1;
2789 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2791 if (__skb_gro_checksum_convert_check(skb)) \
2792 __skb_gro_checksum_convert(skb, check, \
2793 compute_pseudo(skb, proto)); \
2796 struct gro_remcsum
{
2801 static inline void skb_gro_remcsum_init(struct gro_remcsum
*grc
)
2807 static inline void *skb_gro_remcsum_process(struct sk_buff
*skb
, void *ptr
,
2808 unsigned int off
, size_t hdrlen
,
2809 int start
, int offset
,
2810 struct gro_remcsum
*grc
,
2814 size_t plen
= hdrlen
+ max_t(size_t, offset
+ sizeof(u16
), start
);
2816 BUG_ON(!NAPI_GRO_CB(skb
)->csum_valid
);
2819 NAPI_GRO_CB(skb
)->gro_remcsum_start
= off
+ hdrlen
+ start
;
2823 ptr
= skb_gro_header_fast(skb
, off
);
2824 if (skb_gro_header_hard(skb
, off
+ plen
)) {
2825 ptr
= skb_gro_header_slow(skb
, off
+ plen
, off
);
2830 delta
= remcsum_adjust(ptr
+ hdrlen
, NAPI_GRO_CB(skb
)->csum
,
2833 /* Adjust skb->csum since we changed the packet */
2834 NAPI_GRO_CB(skb
)->csum
= csum_add(NAPI_GRO_CB(skb
)->csum
, delta
);
2836 grc
->offset
= off
+ hdrlen
+ offset
;
2842 static inline void skb_gro_remcsum_cleanup(struct sk_buff
*skb
,
2843 struct gro_remcsum
*grc
)
2846 size_t plen
= grc
->offset
+ sizeof(u16
);
2851 ptr
= skb_gro_header_fast(skb
, grc
->offset
);
2852 if (skb_gro_header_hard(skb
, grc
->offset
+ sizeof(u16
))) {
2853 ptr
= skb_gro_header_slow(skb
, plen
, grc
->offset
);
2858 remcsum_unadjust((__sum16
*)ptr
, grc
->delta
);
2861 #ifdef CONFIG_XFRM_OFFLOAD
2862 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
*pp
, int flush
)
2864 if (PTR_ERR(pp
) != -EINPROGRESS
)
2865 NAPI_GRO_CB(skb
)->flush
|= flush
;
2867 static inline void skb_gro_flush_final_remcsum(struct sk_buff
*skb
,
2870 struct gro_remcsum
*grc
)
2872 if (PTR_ERR(pp
) != -EINPROGRESS
) {
2873 NAPI_GRO_CB(skb
)->flush
|= flush
;
2874 skb_gro_remcsum_cleanup(skb
, grc
);
2875 skb
->remcsum_offload
= 0;
2879 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
*pp
, int flush
)
2881 NAPI_GRO_CB(skb
)->flush
|= flush
;
2883 static inline void skb_gro_flush_final_remcsum(struct sk_buff
*skb
,
2886 struct gro_remcsum
*grc
)
2888 NAPI_GRO_CB(skb
)->flush
|= flush
;
2889 skb_gro_remcsum_cleanup(skb
, grc
);
2890 skb
->remcsum_offload
= 0;
2894 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2895 unsigned short type
,
2896 const void *daddr
, const void *saddr
,
2899 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2902 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2905 static inline int dev_parse_header(const struct sk_buff
*skb
,
2906 unsigned char *haddr
)
2908 const struct net_device
*dev
= skb
->dev
;
2910 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2912 return dev
->header_ops
->parse(skb
, haddr
);
2915 static inline __be16
dev_parse_header_protocol(const struct sk_buff
*skb
)
2917 const struct net_device
*dev
= skb
->dev
;
2919 if (!dev
->header_ops
|| !dev
->header_ops
->parse_protocol
)
2921 return dev
->header_ops
->parse_protocol(skb
);
2924 /* ll_header must have at least hard_header_len allocated */
2925 static inline bool dev_validate_header(const struct net_device
*dev
,
2926 char *ll_header
, int len
)
2928 if (likely(len
>= dev
->hard_header_len
))
2930 if (len
< dev
->min_header_len
)
2933 if (capable(CAP_SYS_RAWIO
)) {
2934 memset(ll_header
+ len
, 0, dev
->hard_header_len
- len
);
2938 if (dev
->header_ops
&& dev
->header_ops
->validate
)
2939 return dev
->header_ops
->validate(ll_header
, len
);
2944 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
,
2946 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2947 static inline int unregister_gifconf(unsigned int family
)
2949 return register_gifconf(family
, NULL
);
2952 #ifdef CONFIG_NET_FLOW_LIMIT
2953 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2954 struct sd_flow_limit
{
2956 unsigned int num_buckets
;
2957 unsigned int history_head
;
2958 u16 history
[FLOW_LIMIT_HISTORY
];
2962 extern int netdev_flow_limit_table_len
;
2963 #endif /* CONFIG_NET_FLOW_LIMIT */
2966 * Incoming packets are placed on per-CPU queues
2968 struct softnet_data
{
2969 struct list_head poll_list
;
2970 struct sk_buff_head process_queue
;
2973 unsigned int processed
;
2974 unsigned int time_squeeze
;
2975 unsigned int received_rps
;
2977 struct softnet_data
*rps_ipi_list
;
2979 #ifdef CONFIG_NET_FLOW_LIMIT
2980 struct sd_flow_limit __rcu
*flow_limit
;
2982 struct Qdisc
*output_queue
;
2983 struct Qdisc
**output_queue_tailp
;
2984 struct sk_buff
*completion_queue
;
2985 #ifdef CONFIG_XFRM_OFFLOAD
2986 struct sk_buff_head xfrm_backlog
;
2988 /* written and read only by owning cpu: */
2994 /* input_queue_head should be written by cpu owning this struct,
2995 * and only read by other cpus. Worth using a cache line.
2997 unsigned int input_queue_head ____cacheline_aligned_in_smp
;
2999 /* Elements below can be accessed between CPUs for RPS/RFS */
3000 call_single_data_t csd ____cacheline_aligned_in_smp
;
3001 struct softnet_data
*rps_ipi_next
;
3003 unsigned int input_queue_tail
;
3005 unsigned int dropped
;
3006 struct sk_buff_head input_pkt_queue
;
3007 struct napi_struct backlog
;
3011 static inline void input_queue_head_incr(struct softnet_data
*sd
)
3014 sd
->input_queue_head
++;
3018 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
3019 unsigned int *qtail
)
3022 *qtail
= ++sd
->input_queue_tail
;
3026 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
3028 static inline int dev_recursion_level(void)
3030 return this_cpu_read(softnet_data
.xmit
.recursion
);
3033 #define XMIT_RECURSION_LIMIT 10
3034 static inline bool dev_xmit_recursion(void)
3036 return unlikely(__this_cpu_read(softnet_data
.xmit
.recursion
) >
3037 XMIT_RECURSION_LIMIT
);
3040 static inline void dev_xmit_recursion_inc(void)
3042 __this_cpu_inc(softnet_data
.xmit
.recursion
);
3045 static inline void dev_xmit_recursion_dec(void)
3047 __this_cpu_dec(softnet_data
.xmit
.recursion
);
3050 void __netif_schedule(struct Qdisc
*q
);
3051 void netif_schedule_queue(struct netdev_queue
*txq
);
3053 static inline void netif_tx_schedule_all(struct net_device
*dev
)
3057 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
3058 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
3061 static __always_inline
void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
3063 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
3067 * netif_start_queue - allow transmit
3068 * @dev: network device
3070 * Allow upper layers to call the device hard_start_xmit routine.
3072 static inline void netif_start_queue(struct net_device
*dev
)
3074 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
3077 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
3081 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3082 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3083 netif_tx_start_queue(txq
);
3087 void netif_tx_wake_queue(struct netdev_queue
*dev_queue
);
3090 * netif_wake_queue - restart transmit
3091 * @dev: network device
3093 * Allow upper layers to call the device hard_start_xmit routine.
3094 * Used for flow control when transmit resources are available.
3096 static inline void netif_wake_queue(struct net_device
*dev
)
3098 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
3101 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
3105 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3106 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3107 netif_tx_wake_queue(txq
);
3111 static __always_inline
void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
3113 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
3117 * netif_stop_queue - stop transmitted packets
3118 * @dev: network device
3120 * Stop upper layers calling the device hard_start_xmit routine.
3121 * Used for flow control when transmit resources are unavailable.
3123 static inline void netif_stop_queue(struct net_device
*dev
)
3125 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
3128 void netif_tx_stop_all_queues(struct net_device
*dev
);
3130 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
3132 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
3136 * netif_queue_stopped - test if transmit queue is flowblocked
3137 * @dev: network device
3139 * Test if transmit queue on device is currently unable to send.
3141 static inline bool netif_queue_stopped(const struct net_device
*dev
)
3143 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
3146 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
3148 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
3152 netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
3154 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
3158 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue
*dev_queue
)
3160 return dev_queue
->state
& QUEUE_STATE_DRV_XOFF_OR_FROZEN
;
3164 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3165 * @dev_queue: pointer to transmit queue
3167 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3168 * to give appropriate hint to the CPU.
3170 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue
*dev_queue
)
3173 prefetchw(&dev_queue
->dql
.num_queued
);
3178 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3179 * @dev_queue: pointer to transmit queue
3181 * BQL enabled drivers might use this helper in their TX completion path,
3182 * to give appropriate hint to the CPU.
3184 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue
*dev_queue
)
3187 prefetchw(&dev_queue
->dql
.limit
);
3191 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
3195 dql_queued(&dev_queue
->dql
, bytes
);
3197 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
3200 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
3203 * The XOFF flag must be set before checking the dql_avail below,
3204 * because in netdev_tx_completed_queue we update the dql_completed
3205 * before checking the XOFF flag.
3209 /* check again in case another CPU has just made room avail */
3210 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
3211 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
3215 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3216 * that they should not test BQL status themselves.
3217 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3219 * Returns true if the doorbell must be used to kick the NIC.
3221 static inline bool __netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
3227 dql_queued(&dev_queue
->dql
, bytes
);
3229 return netif_tx_queue_stopped(dev_queue
);
3231 netdev_tx_sent_queue(dev_queue
, bytes
);
3236 * netdev_sent_queue - report the number of bytes queued to hardware
3237 * @dev: network device
3238 * @bytes: number of bytes queued to the hardware device queue
3240 * Report the number of bytes queued for sending/completion to the network
3241 * device hardware queue. @bytes should be a good approximation and should
3242 * exactly match netdev_completed_queue() @bytes
3244 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
3246 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
3249 static inline bool __netdev_sent_queue(struct net_device
*dev
,
3253 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
,
3257 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
3258 unsigned int pkts
, unsigned int bytes
)
3261 if (unlikely(!bytes
))
3264 dql_completed(&dev_queue
->dql
, bytes
);
3267 * Without the memory barrier there is a small possiblity that
3268 * netdev_tx_sent_queue will miss the update and cause the queue to
3269 * be stopped forever
3273 if (dql_avail(&dev_queue
->dql
) < 0)
3276 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
3277 netif_schedule_queue(dev_queue
);
3282 * netdev_completed_queue - report bytes and packets completed by device
3283 * @dev: network device
3284 * @pkts: actual number of packets sent over the medium
3285 * @bytes: actual number of bytes sent over the medium
3287 * Report the number of bytes and packets transmitted by the network device
3288 * hardware queue over the physical medium, @bytes must exactly match the
3289 * @bytes amount passed to netdev_sent_queue()
3291 static inline void netdev_completed_queue(struct net_device
*dev
,
3292 unsigned int pkts
, unsigned int bytes
)
3294 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
3297 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
3300 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
3306 * netdev_reset_queue - reset the packets and bytes count of a network device
3307 * @dev_queue: network device
3309 * Reset the bytes and packet count of a network device and clear the
3310 * software flow control OFF bit for this network device
3312 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
3314 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
3318 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3319 * @dev: network device
3320 * @queue_index: given tx queue index
3322 * Returns 0 if given tx queue index >= number of device tx queues,
3323 * otherwise returns the originally passed tx queue index.
3325 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
3327 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
3328 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3329 dev
->name
, queue_index
,
3330 dev
->real_num_tx_queues
);
3338 * netif_running - test if up
3339 * @dev: network device
3341 * Test if the device has been brought up.
3343 static inline bool netif_running(const struct net_device
*dev
)
3345 return test_bit(__LINK_STATE_START
, &dev
->state
);
3349 * Routines to manage the subqueues on a device. We only need start,
3350 * stop, and a check if it's stopped. All other device management is
3351 * done at the overall netdevice level.
3352 * Also test the device if we're multiqueue.
3356 * netif_start_subqueue - allow sending packets on subqueue
3357 * @dev: network device
3358 * @queue_index: sub queue index
3360 * Start individual transmit queue of a device with multiple transmit queues.
3362 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
3364 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3366 netif_tx_start_queue(txq
);
3370 * netif_stop_subqueue - stop sending packets on subqueue
3371 * @dev: network device
3372 * @queue_index: sub queue index
3374 * Stop individual transmit queue of a device with multiple transmit queues.
3376 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
3378 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3379 netif_tx_stop_queue(txq
);
3383 * netif_subqueue_stopped - test status of subqueue
3384 * @dev: network device
3385 * @queue_index: sub queue index
3387 * Check individual transmit queue of a device with multiple transmit queues.
3389 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
3392 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3394 return netif_tx_queue_stopped(txq
);
3397 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
3398 struct sk_buff
*skb
)
3400 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
3404 * netif_wake_subqueue - allow sending packets on subqueue
3405 * @dev: network device
3406 * @queue_index: sub queue index
3408 * Resume individual transmit queue of a device with multiple transmit queues.
3410 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
3412 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3414 netif_tx_wake_queue(txq
);
3418 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
3420 int __netif_set_xps_queue(struct net_device
*dev
, const unsigned long *mask
,
3421 u16 index
, bool is_rxqs_map
);
3424 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3425 * @j: CPU/Rx queue index
3426 * @mask: bitmask of all cpus/rx queues
3427 * @nr_bits: number of bits in the bitmask
3429 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3431 static inline bool netif_attr_test_mask(unsigned long j
,
3432 const unsigned long *mask
,
3433 unsigned int nr_bits
)
3435 cpu_max_bits_warn(j
, nr_bits
);
3436 return test_bit(j
, mask
);
3440 * netif_attr_test_online - Test for online CPU/Rx queue
3441 * @j: CPU/Rx queue index
3442 * @online_mask: bitmask for CPUs/Rx queues that are online
3443 * @nr_bits: number of bits in the bitmask
3445 * Returns true if a CPU/Rx queue is online.
3447 static inline bool netif_attr_test_online(unsigned long j
,
3448 const unsigned long *online_mask
,
3449 unsigned int nr_bits
)
3451 cpu_max_bits_warn(j
, nr_bits
);
3454 return test_bit(j
, online_mask
);
3456 return (j
< nr_bits
);
3460 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3461 * @n: CPU/Rx queue index
3462 * @srcp: the cpumask/Rx queue mask pointer
3463 * @nr_bits: number of bits in the bitmask
3465 * Returns >= nr_bits if no further CPUs/Rx queues set.
3467 static inline unsigned int netif_attrmask_next(int n
, const unsigned long *srcp
,
3468 unsigned int nr_bits
)
3470 /* -1 is a legal arg here. */
3472 cpu_max_bits_warn(n
, nr_bits
);
3475 return find_next_bit(srcp
, nr_bits
, n
+ 1);
3481 * netif_attrmask_next_and - get the next CPU/Rx queue in *src1p & *src2p
3482 * @n: CPU/Rx queue index
3483 * @src1p: the first CPUs/Rx queues mask pointer
3484 * @src2p: the second CPUs/Rx queues mask pointer
3485 * @nr_bits: number of bits in the bitmask
3487 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3489 static inline int netif_attrmask_next_and(int n
, const unsigned long *src1p
,
3490 const unsigned long *src2p
,
3491 unsigned int nr_bits
)
3493 /* -1 is a legal arg here. */
3495 cpu_max_bits_warn(n
, nr_bits
);
3498 return find_next_and_bit(src1p
, src2p
, nr_bits
, n
+ 1);
3500 return find_next_bit(src1p
, nr_bits
, n
+ 1);
3502 return find_next_bit(src2p
, nr_bits
, n
+ 1);
3507 static inline int netif_set_xps_queue(struct net_device
*dev
,
3508 const struct cpumask
*mask
,
3514 static inline int __netif_set_xps_queue(struct net_device
*dev
,
3515 const unsigned long *mask
,
3516 u16 index
, bool is_rxqs_map
)
3523 * netif_is_multiqueue - test if device has multiple transmit queues
3524 * @dev: network device
3526 * Check if device has multiple transmit queues
3528 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
3530 return dev
->num_tx_queues
> 1;
3533 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
3536 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
3538 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
3541 dev
->real_num_rx_queues
= rxqs
;
3546 static inline struct netdev_rx_queue
*
3547 __netif_get_rx_queue(struct net_device
*dev
, unsigned int rxq
)
3549 return dev
->_rx
+ rxq
;
3553 static inline unsigned int get_netdev_rx_queue_index(
3554 struct netdev_rx_queue
*queue
)
3556 struct net_device
*dev
= queue
->dev
;
3557 int index
= queue
- dev
->_rx
;
3559 BUG_ON(index
>= dev
->num_rx_queues
);
3564 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3565 int netif_get_num_default_rss_queues(void);
3567 enum skb_free_reason
{
3568 SKB_REASON_CONSUMED
,
3572 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
3573 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
3576 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3577 * interrupt context or with hardware interrupts being disabled.
3578 * (in_irq() || irqs_disabled())
3580 * We provide four helpers that can be used in following contexts :
3582 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3583 * replacing kfree_skb(skb)
3585 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3586 * Typically used in place of consume_skb(skb) in TX completion path
3588 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3589 * replacing kfree_skb(skb)
3591 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3592 * and consumed a packet. Used in place of consume_skb(skb)
3594 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
3596 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
3599 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
3601 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
3604 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
3606 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
3609 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
3611 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
3614 void generic_xdp_tx(struct sk_buff
*skb
, struct bpf_prog
*xdp_prog
);
3615 int do_xdp_generic(struct bpf_prog
*xdp_prog
, struct sk_buff
*skb
);
3616 int netif_rx(struct sk_buff
*skb
);
3617 int netif_rx_ni(struct sk_buff
*skb
);
3618 int netif_receive_skb(struct sk_buff
*skb
);
3619 int netif_receive_skb_core(struct sk_buff
*skb
);
3620 void netif_receive_skb_list(struct list_head
*head
);
3621 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
3622 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
3623 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
3624 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
3625 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
3626 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
3628 static inline void napi_free_frags(struct napi_struct
*napi
)
3630 kfree_skb(napi
->skb
);
3634 bool netdev_is_rx_handler_busy(struct net_device
*dev
);
3635 int netdev_rx_handler_register(struct net_device
*dev
,
3636 rx_handler_func_t
*rx_handler
,
3637 void *rx_handler_data
);
3638 void netdev_rx_handler_unregister(struct net_device
*dev
);
3640 bool dev_valid_name(const char *name
);
3641 int dev_ioctl(struct net
*net
, unsigned int cmd
, struct ifreq
*ifr
,
3642 bool *need_copyout
);
3643 int dev_ifconf(struct net
*net
, struct ifconf
*, int);
3644 int dev_ethtool(struct net
*net
, struct ifreq
*);
3645 unsigned int dev_get_flags(const struct net_device
*);
3646 int __dev_change_flags(struct net_device
*dev
, unsigned int flags
,
3647 struct netlink_ext_ack
*extack
);
3648 int dev_change_flags(struct net_device
*dev
, unsigned int flags
,
3649 struct netlink_ext_ack
*extack
);
3650 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
3651 unsigned int gchanges
);
3652 int dev_change_name(struct net_device
*, const char *);
3653 int dev_set_alias(struct net_device
*, const char *, size_t);
3654 int dev_get_alias(const struct net_device
*, char *, size_t);
3655 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
3656 int __dev_set_mtu(struct net_device
*, int);
3657 int dev_set_mtu_ext(struct net_device
*dev
, int mtu
,
3658 struct netlink_ext_ack
*extack
);
3659 int dev_set_mtu(struct net_device
*, int);
3660 int dev_change_tx_queue_len(struct net_device
*, unsigned long);
3661 void dev_set_group(struct net_device
*, int);
3662 int dev_pre_changeaddr_notify(struct net_device
*dev
, const char *addr
,
3663 struct netlink_ext_ack
*extack
);
3664 int dev_set_mac_address(struct net_device
*dev
, struct sockaddr
*sa
,
3665 struct netlink_ext_ack
*extack
);
3666 int dev_change_carrier(struct net_device
*, bool new_carrier
);
3667 int dev_get_phys_port_id(struct net_device
*dev
,
3668 struct netdev_phys_item_id
*ppid
);
3669 int dev_get_phys_port_name(struct net_device
*dev
,
3670 char *name
, size_t len
);
3671 int dev_get_port_parent_id(struct net_device
*dev
,
3672 struct netdev_phys_item_id
*ppid
, bool recurse
);
3673 bool netdev_port_same_parent_id(struct net_device
*a
, struct net_device
*b
);
3674 int dev_change_proto_down(struct net_device
*dev
, bool proto_down
);
3675 int dev_change_proto_down_generic(struct net_device
*dev
, bool proto_down
);
3676 struct sk_buff
*validate_xmit_skb_list(struct sk_buff
*skb
, struct net_device
*dev
, bool *again
);
3677 struct sk_buff
*dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
3678 struct netdev_queue
*txq
, int *ret
);
3680 typedef int (*bpf_op_t
)(struct net_device
*dev
, struct netdev_bpf
*bpf
);
3681 int dev_change_xdp_fd(struct net_device
*dev
, struct netlink_ext_ack
*extack
,
3683 u32
__dev_xdp_query(struct net_device
*dev
, bpf_op_t xdp_op
,
3684 enum bpf_netdev_command cmd
);
3685 int xdp_umem_query(struct net_device
*dev
, u16 queue_id
);
3687 int __dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3688 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3689 bool is_skb_forwardable(const struct net_device
*dev
,
3690 const struct sk_buff
*skb
);
3692 static __always_inline
int ____dev_forward_skb(struct net_device
*dev
,
3693 struct sk_buff
*skb
)
3695 if (skb_orphan_frags(skb
, GFP_ATOMIC
) ||
3696 unlikely(!is_skb_forwardable(dev
, skb
))) {
3697 atomic_long_inc(&dev
->rx_dropped
);
3702 skb_scrub_packet(skb
, true);
3707 bool dev_nit_active(struct net_device
*dev
);
3708 void dev_queue_xmit_nit(struct sk_buff
*skb
, struct net_device
*dev
);
3710 extern int netdev_budget
;
3711 extern unsigned int netdev_budget_usecs
;
3713 /* Called by rtnetlink.c:rtnl_unlock() */
3714 void netdev_run_todo(void);
3717 * dev_put - release reference to device
3718 * @dev: network device
3720 * Release reference to device to allow it to be freed.
3722 static inline void dev_put(struct net_device
*dev
)
3724 this_cpu_dec(*dev
->pcpu_refcnt
);
3728 * dev_hold - get reference to device
3729 * @dev: network device
3731 * Hold reference to device to keep it from being freed.
3733 static inline void dev_hold(struct net_device
*dev
)
3735 this_cpu_inc(*dev
->pcpu_refcnt
);
3738 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3739 * and _off may be called from IRQ context, but it is caller
3740 * who is responsible for serialization of these calls.
3742 * The name carrier is inappropriate, these functions should really be
3743 * called netif_lowerlayer_*() because they represent the state of any
3744 * kind of lower layer not just hardware media.
3747 void linkwatch_init_dev(struct net_device
*dev
);
3748 void linkwatch_fire_event(struct net_device
*dev
);
3749 void linkwatch_forget_dev(struct net_device
*dev
);
3752 * netif_carrier_ok - test if carrier present
3753 * @dev: network device
3755 * Check if carrier is present on device
3757 static inline bool netif_carrier_ok(const struct net_device
*dev
)
3759 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
3762 unsigned long dev_trans_start(struct net_device
*dev
);
3764 void __netdev_watchdog_up(struct net_device
*dev
);
3766 void netif_carrier_on(struct net_device
*dev
);
3768 void netif_carrier_off(struct net_device
*dev
);
3771 * netif_dormant_on - mark device as dormant.
3772 * @dev: network device
3774 * Mark device as dormant (as per RFC2863).
3776 * The dormant state indicates that the relevant interface is not
3777 * actually in a condition to pass packets (i.e., it is not 'up') but is
3778 * in a "pending" state, waiting for some external event. For "on-
3779 * demand" interfaces, this new state identifies the situation where the
3780 * interface is waiting for events to place it in the up state.
3782 static inline void netif_dormant_on(struct net_device
*dev
)
3784 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3785 linkwatch_fire_event(dev
);
3789 * netif_dormant_off - set device as not dormant.
3790 * @dev: network device
3792 * Device is not in dormant state.
3794 static inline void netif_dormant_off(struct net_device
*dev
)
3796 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3797 linkwatch_fire_event(dev
);
3801 * netif_dormant - test if device is dormant
3802 * @dev: network device
3804 * Check if device is dormant.
3806 static inline bool netif_dormant(const struct net_device
*dev
)
3808 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
3813 * netif_oper_up - test if device is operational
3814 * @dev: network device
3816 * Check if carrier is operational
3818 static inline bool netif_oper_up(const struct net_device
*dev
)
3820 return (dev
->operstate
== IF_OPER_UP
||
3821 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
3825 * netif_device_present - is device available or removed
3826 * @dev: network device
3828 * Check if device has not been removed from system.
3830 static inline bool netif_device_present(struct net_device
*dev
)
3832 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
3835 void netif_device_detach(struct net_device
*dev
);
3837 void netif_device_attach(struct net_device
*dev
);
3840 * Network interface message level settings
3844 NETIF_MSG_DRV
= 0x0001,
3845 NETIF_MSG_PROBE
= 0x0002,
3846 NETIF_MSG_LINK
= 0x0004,
3847 NETIF_MSG_TIMER
= 0x0008,
3848 NETIF_MSG_IFDOWN
= 0x0010,
3849 NETIF_MSG_IFUP
= 0x0020,
3850 NETIF_MSG_RX_ERR
= 0x0040,
3851 NETIF_MSG_TX_ERR
= 0x0080,
3852 NETIF_MSG_TX_QUEUED
= 0x0100,
3853 NETIF_MSG_INTR
= 0x0200,
3854 NETIF_MSG_TX_DONE
= 0x0400,
3855 NETIF_MSG_RX_STATUS
= 0x0800,
3856 NETIF_MSG_PKTDATA
= 0x1000,
3857 NETIF_MSG_HW
= 0x2000,
3858 NETIF_MSG_WOL
= 0x4000,
3861 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3862 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3863 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3864 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3865 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3866 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3867 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3868 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3869 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3870 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3871 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3872 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3873 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3874 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3875 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3877 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
3880 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
3881 return default_msg_enable_bits
;
3882 if (debug_value
== 0) /* no output */
3884 /* set low N bits */
3885 return (1U << debug_value
) - 1;
3888 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
3890 spin_lock(&txq
->_xmit_lock
);
3891 txq
->xmit_lock_owner
= cpu
;
3894 static inline bool __netif_tx_acquire(struct netdev_queue
*txq
)
3896 __acquire(&txq
->_xmit_lock
);
3900 static inline void __netif_tx_release(struct netdev_queue
*txq
)
3902 __release(&txq
->_xmit_lock
);
3905 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
3907 spin_lock_bh(&txq
->_xmit_lock
);
3908 txq
->xmit_lock_owner
= smp_processor_id();
3911 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
3913 bool ok
= spin_trylock(&txq
->_xmit_lock
);
3915 txq
->xmit_lock_owner
= smp_processor_id();
3919 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
3921 txq
->xmit_lock_owner
= -1;
3922 spin_unlock(&txq
->_xmit_lock
);
3925 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
3927 txq
->xmit_lock_owner
= -1;
3928 spin_unlock_bh(&txq
->_xmit_lock
);
3931 static inline void txq_trans_update(struct netdev_queue
*txq
)
3933 if (txq
->xmit_lock_owner
!= -1)
3934 txq
->trans_start
= jiffies
;
3937 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3938 static inline void netif_trans_update(struct net_device
*dev
)
3940 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, 0);
3942 if (txq
->trans_start
!= jiffies
)
3943 txq
->trans_start
= jiffies
;
3947 * netif_tx_lock - grab network device transmit lock
3948 * @dev: network device
3950 * Get network device transmit lock
3952 static inline void netif_tx_lock(struct net_device
*dev
)
3957 spin_lock(&dev
->tx_global_lock
);
3958 cpu
= smp_processor_id();
3959 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3960 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3962 /* We are the only thread of execution doing a
3963 * freeze, but we have to grab the _xmit_lock in
3964 * order to synchronize with threads which are in
3965 * the ->hard_start_xmit() handler and already
3966 * checked the frozen bit.
3968 __netif_tx_lock(txq
, cpu
);
3969 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3970 __netif_tx_unlock(txq
);
3974 static inline void netif_tx_lock_bh(struct net_device
*dev
)
3980 static inline void netif_tx_unlock(struct net_device
*dev
)
3984 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3985 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3987 /* No need to grab the _xmit_lock here. If the
3988 * queue is not stopped for another reason, we
3991 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3992 netif_schedule_queue(txq
);
3994 spin_unlock(&dev
->tx_global_lock
);
3997 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
3999 netif_tx_unlock(dev
);
4003 #define HARD_TX_LOCK(dev, txq, cpu) { \
4004 if ((dev->features & NETIF_F_LLTX) == 0) { \
4005 __netif_tx_lock(txq, cpu); \
4007 __netif_tx_acquire(txq); \
4011 #define HARD_TX_TRYLOCK(dev, txq) \
4012 (((dev->features & NETIF_F_LLTX) == 0) ? \
4013 __netif_tx_trylock(txq) : \
4014 __netif_tx_acquire(txq))
4016 #define HARD_TX_UNLOCK(dev, txq) { \
4017 if ((dev->features & NETIF_F_LLTX) == 0) { \
4018 __netif_tx_unlock(txq); \
4020 __netif_tx_release(txq); \
4024 static inline void netif_tx_disable(struct net_device
*dev
)
4030 cpu
= smp_processor_id();
4031 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
4032 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
4034 __netif_tx_lock(txq
, cpu
);
4035 netif_tx_stop_queue(txq
);
4036 __netif_tx_unlock(txq
);
4041 static inline void netif_addr_lock(struct net_device
*dev
)
4043 spin_lock(&dev
->addr_list_lock
);
4046 static inline void netif_addr_lock_nested(struct net_device
*dev
)
4048 int subclass
= SINGLE_DEPTH_NESTING
;
4050 if (dev
->netdev_ops
->ndo_get_lock_subclass
)
4051 subclass
= dev
->netdev_ops
->ndo_get_lock_subclass(dev
);
4053 spin_lock_nested(&dev
->addr_list_lock
, subclass
);
4056 static inline void netif_addr_lock_bh(struct net_device
*dev
)
4058 spin_lock_bh(&dev
->addr_list_lock
);
4061 static inline void netif_addr_unlock(struct net_device
*dev
)
4063 spin_unlock(&dev
->addr_list_lock
);
4066 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
4068 spin_unlock_bh(&dev
->addr_list_lock
);
4072 * dev_addrs walker. Should be used only for read access. Call with
4073 * rcu_read_lock held.
4075 #define for_each_dev_addr(dev, ha) \
4076 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4078 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4080 void ether_setup(struct net_device
*dev
);
4082 /* Support for loadable net-drivers */
4083 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
4084 unsigned char name_assign_type
,
4085 void (*setup
)(struct net_device
*),
4086 unsigned int txqs
, unsigned int rxqs
);
4087 int dev_get_valid_name(struct net
*net
, struct net_device
*dev
,
4090 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4091 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4093 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4094 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4097 int register_netdev(struct net_device
*dev
);
4098 void unregister_netdev(struct net_device
*dev
);
4100 /* General hardware address lists handling functions */
4101 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
4102 struct netdev_hw_addr_list
*from_list
, int addr_len
);
4103 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
4104 struct netdev_hw_addr_list
*from_list
, int addr_len
);
4105 int __hw_addr_sync_dev(struct netdev_hw_addr_list
*list
,
4106 struct net_device
*dev
,
4107 int (*sync
)(struct net_device
*, const unsigned char *),
4108 int (*unsync
)(struct net_device
*,
4109 const unsigned char *));
4110 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list
*list
,
4111 struct net_device
*dev
,
4112 int (*sync
)(struct net_device
*,
4113 const unsigned char *, int),
4114 int (*unsync
)(struct net_device
*,
4115 const unsigned char *, int));
4116 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list
*list
,
4117 struct net_device
*dev
,
4118 int (*unsync
)(struct net_device
*,
4119 const unsigned char *, int));
4120 void __hw_addr_unsync_dev(struct netdev_hw_addr_list
*list
,
4121 struct net_device
*dev
,
4122 int (*unsync
)(struct net_device
*,
4123 const unsigned char *));
4124 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
4126 /* Functions used for device addresses handling */
4127 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
4128 unsigned char addr_type
);
4129 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
4130 unsigned char addr_type
);
4131 void dev_addr_flush(struct net_device
*dev
);
4132 int dev_addr_init(struct net_device
*dev
);
4134 /* Functions used for unicast addresses handling */
4135 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
4136 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
4137 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
4138 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
4139 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
4140 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
4141 void dev_uc_flush(struct net_device
*dev
);
4142 void dev_uc_init(struct net_device
*dev
);
4145 * __dev_uc_sync - Synchonize device's unicast list
4146 * @dev: device to sync
4147 * @sync: function to call if address should be added
4148 * @unsync: function to call if address should be removed
4150 * Add newly added addresses to the interface, and release
4151 * addresses that have been deleted.
4153 static inline int __dev_uc_sync(struct net_device
*dev
,
4154 int (*sync
)(struct net_device
*,
4155 const unsigned char *),
4156 int (*unsync
)(struct net_device
*,
4157 const unsigned char *))
4159 return __hw_addr_sync_dev(&dev
->uc
, dev
, sync
, unsync
);
4163 * __dev_uc_unsync - Remove synchronized addresses from device
4164 * @dev: device to sync
4165 * @unsync: function to call if address should be removed
4167 * Remove all addresses that were added to the device by dev_uc_sync().
4169 static inline void __dev_uc_unsync(struct net_device
*dev
,
4170 int (*unsync
)(struct net_device
*,
4171 const unsigned char *))
4173 __hw_addr_unsync_dev(&dev
->uc
, dev
, unsync
);
4176 /* Functions used for multicast addresses handling */
4177 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
4178 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
4179 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
4180 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
4181 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
4182 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
4183 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
4184 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
4185 void dev_mc_flush(struct net_device
*dev
);
4186 void dev_mc_init(struct net_device
*dev
);
4189 * __dev_mc_sync - Synchonize device's multicast list
4190 * @dev: device to sync
4191 * @sync: function to call if address should be added
4192 * @unsync: function to call if address should be removed
4194 * Add newly added addresses to the interface, and release
4195 * addresses that have been deleted.
4197 static inline int __dev_mc_sync(struct net_device
*dev
,
4198 int (*sync
)(struct net_device
*,
4199 const unsigned char *),
4200 int (*unsync
)(struct net_device
*,
4201 const unsigned char *))
4203 return __hw_addr_sync_dev(&dev
->mc
, dev
, sync
, unsync
);
4207 * __dev_mc_unsync - Remove synchronized addresses from device
4208 * @dev: device to sync
4209 * @unsync: function to call if address should be removed
4211 * Remove all addresses that were added to the device by dev_mc_sync().
4213 static inline void __dev_mc_unsync(struct net_device
*dev
,
4214 int (*unsync
)(struct net_device
*,
4215 const unsigned char *))
4217 __hw_addr_unsync_dev(&dev
->mc
, dev
, unsync
);
4220 /* Functions used for secondary unicast and multicast support */
4221 void dev_set_rx_mode(struct net_device
*dev
);
4222 void __dev_set_rx_mode(struct net_device
*dev
);
4223 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
4224 int dev_set_allmulti(struct net_device
*dev
, int inc
);
4225 void netdev_state_change(struct net_device
*dev
);
4226 void netdev_notify_peers(struct net_device
*dev
);
4227 void netdev_features_change(struct net_device
*dev
);
4228 /* Load a device via the kmod */
4229 void dev_load(struct net
*net
, const char *name
);
4230 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
4231 struct rtnl_link_stats64
*storage
);
4232 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
4233 const struct net_device_stats
*netdev_stats
);
4235 extern int netdev_max_backlog
;
4236 extern int netdev_tstamp_prequeue
;
4237 extern int weight_p
;
4238 extern int dev_weight_rx_bias
;
4239 extern int dev_weight_tx_bias
;
4240 extern int dev_rx_weight
;
4241 extern int dev_tx_weight
;
4243 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
4244 struct net_device
*netdev_upper_get_next_dev_rcu(struct net_device
*dev
,
4245 struct list_head
**iter
);
4246 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
4247 struct list_head
**iter
);
4249 /* iterate through upper list, must be called under RCU read lock */
4250 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4251 for (iter = &(dev)->adj_list.upper, \
4252 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4254 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4256 int netdev_walk_all_upper_dev_rcu(struct net_device
*dev
,
4257 int (*fn
)(struct net_device
*upper_dev
,
4261 bool netdev_has_upper_dev_all_rcu(struct net_device
*dev
,
4262 struct net_device
*upper_dev
);
4264 bool netdev_has_any_upper_dev(struct net_device
*dev
);
4266 void *netdev_lower_get_next_private(struct net_device
*dev
,
4267 struct list_head
**iter
);
4268 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
4269 struct list_head
**iter
);
4271 #define netdev_for_each_lower_private(dev, priv, iter) \
4272 for (iter = (dev)->adj_list.lower.next, \
4273 priv = netdev_lower_get_next_private(dev, &(iter)); \
4275 priv = netdev_lower_get_next_private(dev, &(iter)))
4277 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4278 for (iter = &(dev)->adj_list.lower, \
4279 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4281 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4283 void *netdev_lower_get_next(struct net_device
*dev
,
4284 struct list_head
**iter
);
4286 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4287 for (iter = (dev)->adj_list.lower.next, \
4288 ldev = netdev_lower_get_next(dev, &(iter)); \
4290 ldev = netdev_lower_get_next(dev, &(iter)))
4292 struct net_device
*netdev_all_lower_get_next(struct net_device
*dev
,
4293 struct list_head
**iter
);
4294 struct net_device
*netdev_all_lower_get_next_rcu(struct net_device
*dev
,
4295 struct list_head
**iter
);
4297 int netdev_walk_all_lower_dev(struct net_device
*dev
,
4298 int (*fn
)(struct net_device
*lower_dev
,
4301 int netdev_walk_all_lower_dev_rcu(struct net_device
*dev
,
4302 int (*fn
)(struct net_device
*lower_dev
,
4306 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
4307 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
4308 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
4309 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
4310 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
,
4311 struct netlink_ext_ack
*extack
);
4312 int netdev_master_upper_dev_link(struct net_device
*dev
,
4313 struct net_device
*upper_dev
,
4314 void *upper_priv
, void *upper_info
,
4315 struct netlink_ext_ack
*extack
);
4316 void netdev_upper_dev_unlink(struct net_device
*dev
,
4317 struct net_device
*upper_dev
);
4318 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
4319 void *netdev_lower_dev_get_private(struct net_device
*dev
,
4320 struct net_device
*lower_dev
);
4321 void netdev_lower_state_changed(struct net_device
*lower_dev
,
4322 void *lower_state_info
);
4324 /* RSS keys are 40 or 52 bytes long */
4325 #define NETDEV_RSS_KEY_LEN 52
4326 extern u8 netdev_rss_key
[NETDEV_RSS_KEY_LEN
] __read_mostly
;
4327 void netdev_rss_key_fill(void *buffer
, size_t len
);
4329 int dev_get_nest_level(struct net_device
*dev
);
4330 int skb_checksum_help(struct sk_buff
*skb
);
4331 int skb_crc32c_csum_help(struct sk_buff
*skb
);
4332 int skb_csum_hwoffload_help(struct sk_buff
*skb
,
4333 const netdev_features_t features
);
4335 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
4336 netdev_features_t features
, bool tx_path
);
4337 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
4338 netdev_features_t features
);
4340 struct netdev_bonding_info
{
4345 struct netdev_notifier_bonding_info
{
4346 struct netdev_notifier_info info
; /* must be first */
4347 struct netdev_bonding_info bonding_info
;
4350 void netdev_bonding_info_change(struct net_device
*dev
,
4351 struct netdev_bonding_info
*bonding_info
);
4354 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
4356 return __skb_gso_segment(skb
, features
, true);
4358 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
4360 static inline bool can_checksum_protocol(netdev_features_t features
,
4363 if (protocol
== htons(ETH_P_FCOE
))
4364 return !!(features
& NETIF_F_FCOE_CRC
);
4366 /* Assume this is an IP checksum (not SCTP CRC) */
4368 if (features
& NETIF_F_HW_CSUM
) {
4369 /* Can checksum everything */
4374 case htons(ETH_P_IP
):
4375 return !!(features
& NETIF_F_IP_CSUM
);
4376 case htons(ETH_P_IPV6
):
4377 return !!(features
& NETIF_F_IPV6_CSUM
);
4384 void netdev_rx_csum_fault(struct net_device
*dev
, struct sk_buff
*skb
);
4386 static inline void netdev_rx_csum_fault(struct net_device
*dev
,
4387 struct sk_buff
*skb
)
4391 /* rx skb timestamps */
4392 void net_enable_timestamp(void);
4393 void net_disable_timestamp(void);
4395 #ifdef CONFIG_PROC_FS
4396 int __init
dev_proc_init(void);
4398 #define dev_proc_init() 0
4401 static inline netdev_tx_t
__netdev_start_xmit(const struct net_device_ops
*ops
,
4402 struct sk_buff
*skb
, struct net_device
*dev
,
4405 __this_cpu_write(softnet_data
.xmit
.more
, more
);
4406 return ops
->ndo_start_xmit(skb
, dev
);
4409 static inline bool netdev_xmit_more(void)
4411 return __this_cpu_read(softnet_data
.xmit
.more
);
4414 static inline netdev_tx_t
netdev_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
4415 struct netdev_queue
*txq
, bool more
)
4417 const struct net_device_ops
*ops
= dev
->netdev_ops
;
4420 rc
= __netdev_start_xmit(ops
, skb
, dev
, more
);
4421 if (rc
== NETDEV_TX_OK
)
4422 txq_trans_update(txq
);
4427 int netdev_class_create_file_ns(const struct class_attribute
*class_attr
,
4429 void netdev_class_remove_file_ns(const struct class_attribute
*class_attr
,
4432 static inline int netdev_class_create_file(const struct class_attribute
*class_attr
)
4434 return netdev_class_create_file_ns(class_attr
, NULL
);
4437 static inline void netdev_class_remove_file(const struct class_attribute
*class_attr
)
4439 netdev_class_remove_file_ns(class_attr
, NULL
);
4442 extern const struct kobj_ns_type_operations net_ns_type_operations
;
4444 const char *netdev_drivername(const struct net_device
*dev
);
4446 void linkwatch_run_queue(void);
4448 static inline netdev_features_t
netdev_intersect_features(netdev_features_t f1
,
4449 netdev_features_t f2
)
4451 if ((f1
^ f2
) & NETIF_F_HW_CSUM
) {
4452 if (f1
& NETIF_F_HW_CSUM
)
4453 f1
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4455 f2
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4461 static inline netdev_features_t
netdev_get_wanted_features(
4462 struct net_device
*dev
)
4464 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
4466 netdev_features_t
netdev_increment_features(netdev_features_t all
,
4467 netdev_features_t one
, netdev_features_t mask
);
4469 /* Allow TSO being used on stacked device :
4470 * Performing the GSO segmentation before last device
4471 * is a performance improvement.
4473 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
4474 netdev_features_t mask
)
4476 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
4479 int __netdev_update_features(struct net_device
*dev
);
4480 void netdev_update_features(struct net_device
*dev
);
4481 void netdev_change_features(struct net_device
*dev
);
4483 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
4484 struct net_device
*dev
);
4486 netdev_features_t
passthru_features_check(struct sk_buff
*skb
,
4487 struct net_device
*dev
,
4488 netdev_features_t features
);
4489 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
4491 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
4493 netdev_features_t feature
= (netdev_features_t
)gso_type
<< NETIF_F_GSO_SHIFT
;
4495 /* check flags correspondence */
4496 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
4497 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
4498 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
4499 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID
!= (NETIF_F_TSO_MANGLEID
>> NETIF_F_GSO_SHIFT
));
4500 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
4501 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
4502 BUILD_BUG_ON(SKB_GSO_GRE
!= (NETIF_F_GSO_GRE
>> NETIF_F_GSO_SHIFT
));
4503 BUILD_BUG_ON(SKB_GSO_GRE_CSUM
!= (NETIF_F_GSO_GRE_CSUM
>> NETIF_F_GSO_SHIFT
));
4504 BUILD_BUG_ON(SKB_GSO_IPXIP4
!= (NETIF_F_GSO_IPXIP4
>> NETIF_F_GSO_SHIFT
));
4505 BUILD_BUG_ON(SKB_GSO_IPXIP6
!= (NETIF_F_GSO_IPXIP6
>> NETIF_F_GSO_SHIFT
));
4506 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL
!= (NETIF_F_GSO_UDP_TUNNEL
>> NETIF_F_GSO_SHIFT
));
4507 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM
!= (NETIF_F_GSO_UDP_TUNNEL_CSUM
>> NETIF_F_GSO_SHIFT
));
4508 BUILD_BUG_ON(SKB_GSO_PARTIAL
!= (NETIF_F_GSO_PARTIAL
>> NETIF_F_GSO_SHIFT
));
4509 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM
!= (NETIF_F_GSO_TUNNEL_REMCSUM
>> NETIF_F_GSO_SHIFT
));
4510 BUILD_BUG_ON(SKB_GSO_SCTP
!= (NETIF_F_GSO_SCTP
>> NETIF_F_GSO_SHIFT
));
4511 BUILD_BUG_ON(SKB_GSO_ESP
!= (NETIF_F_GSO_ESP
>> NETIF_F_GSO_SHIFT
));
4512 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_GSO_UDP
>> NETIF_F_GSO_SHIFT
));
4513 BUILD_BUG_ON(SKB_GSO_UDP_L4
!= (NETIF_F_GSO_UDP_L4
>> NETIF_F_GSO_SHIFT
));
4515 return (features
& feature
) == feature
;
4518 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
4520 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
4521 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
4524 static inline bool netif_needs_gso(struct sk_buff
*skb
,
4525 netdev_features_t features
)
4527 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
4528 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
4529 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
4532 static inline void netif_set_gso_max_size(struct net_device
*dev
,
4535 dev
->gso_max_size
= size
;
4538 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
4539 int pulled_hlen
, u16 mac_offset
,
4542 skb
->protocol
= protocol
;
4543 skb
->encapsulation
= 1;
4544 skb_push(skb
, pulled_hlen
);
4545 skb_reset_transport_header(skb
);
4546 skb
->mac_header
= mac_offset
;
4547 skb
->network_header
= skb
->mac_header
+ mac_len
;
4548 skb
->mac_len
= mac_len
;
4551 static inline bool netif_is_macsec(const struct net_device
*dev
)
4553 return dev
->priv_flags
& IFF_MACSEC
;
4556 static inline bool netif_is_macvlan(const struct net_device
*dev
)
4558 return dev
->priv_flags
& IFF_MACVLAN
;
4561 static inline bool netif_is_macvlan_port(const struct net_device
*dev
)
4563 return dev
->priv_flags
& IFF_MACVLAN_PORT
;
4566 static inline bool netif_is_bond_master(const struct net_device
*dev
)
4568 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
4571 static inline bool netif_is_bond_slave(const struct net_device
*dev
)
4573 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
4576 static inline bool netif_supports_nofcs(struct net_device
*dev
)
4578 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
4581 static inline bool netif_has_l3_rx_handler(const struct net_device
*dev
)
4583 return dev
->priv_flags
& IFF_L3MDEV_RX_HANDLER
;
4586 static inline bool netif_is_l3_master(const struct net_device
*dev
)
4588 return dev
->priv_flags
& IFF_L3MDEV_MASTER
;
4591 static inline bool netif_is_l3_slave(const struct net_device
*dev
)
4593 return dev
->priv_flags
& IFF_L3MDEV_SLAVE
;
4596 static inline bool netif_is_bridge_master(const struct net_device
*dev
)
4598 return dev
->priv_flags
& IFF_EBRIDGE
;
4601 static inline bool netif_is_bridge_port(const struct net_device
*dev
)
4603 return dev
->priv_flags
& IFF_BRIDGE_PORT
;
4606 static inline bool netif_is_ovs_master(const struct net_device
*dev
)
4608 return dev
->priv_flags
& IFF_OPENVSWITCH
;
4611 static inline bool netif_is_ovs_port(const struct net_device
*dev
)
4613 return dev
->priv_flags
& IFF_OVS_DATAPATH
;
4616 static inline bool netif_is_team_master(const struct net_device
*dev
)
4618 return dev
->priv_flags
& IFF_TEAM
;
4621 static inline bool netif_is_team_port(const struct net_device
*dev
)
4623 return dev
->priv_flags
& IFF_TEAM_PORT
;
4626 static inline bool netif_is_lag_master(const struct net_device
*dev
)
4628 return netif_is_bond_master(dev
) || netif_is_team_master(dev
);
4631 static inline bool netif_is_lag_port(const struct net_device
*dev
)
4633 return netif_is_bond_slave(dev
) || netif_is_team_port(dev
);
4636 static inline bool netif_is_rxfh_configured(const struct net_device
*dev
)
4638 return dev
->priv_flags
& IFF_RXFH_CONFIGURED
;
4641 static inline bool netif_is_failover(const struct net_device
*dev
)
4643 return dev
->priv_flags
& IFF_FAILOVER
;
4646 static inline bool netif_is_failover_slave(const struct net_device
*dev
)
4648 return dev
->priv_flags
& IFF_FAILOVER_SLAVE
;
4651 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4652 static inline void netif_keep_dst(struct net_device
*dev
)
4654 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
);
4657 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4658 static inline bool netif_reduces_vlan_mtu(struct net_device
*dev
)
4660 /* TODO: reserve and use an additional IFF bit, if we get more users */
4661 return dev
->priv_flags
& IFF_MACSEC
;
4664 extern struct pernet_operations __net_initdata loopback_net_ops
;
4666 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4668 /* netdev_printk helpers, similar to dev_printk */
4670 static inline const char *netdev_name(const struct net_device
*dev
)
4672 if (!dev
->name
[0] || strchr(dev
->name
, '%'))
4673 return "(unnamed net_device)";
4677 static inline bool netdev_unregistering(const struct net_device
*dev
)
4679 return dev
->reg_state
== NETREG_UNREGISTERING
;
4682 static inline const char *netdev_reg_state(const struct net_device
*dev
)
4684 switch (dev
->reg_state
) {
4685 case NETREG_UNINITIALIZED
: return " (uninitialized)";
4686 case NETREG_REGISTERED
: return "";
4687 case NETREG_UNREGISTERING
: return " (unregistering)";
4688 case NETREG_UNREGISTERED
: return " (unregistered)";
4689 case NETREG_RELEASED
: return " (released)";
4690 case NETREG_DUMMY
: return " (dummy)";
4693 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev
->name
, dev
->reg_state
);
4694 return " (unknown)";
4697 __printf(3, 4) __cold
4698 void netdev_printk(const char *level
, const struct net_device
*dev
,
4699 const char *format
, ...);
4700 __printf(2, 3) __cold
4701 void netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
4702 __printf(2, 3) __cold
4703 void netdev_alert(const struct net_device
*dev
, const char *format
, ...);
4704 __printf(2, 3) __cold
4705 void netdev_crit(const struct net_device
*dev
, const char *format
, ...);
4706 __printf(2, 3) __cold
4707 void netdev_err(const struct net_device
*dev
, const char *format
, ...);
4708 __printf(2, 3) __cold
4709 void netdev_warn(const struct net_device
*dev
, const char *format
, ...);
4710 __printf(2, 3) __cold
4711 void netdev_notice(const struct net_device
*dev
, const char *format
, ...);
4712 __printf(2, 3) __cold
4713 void netdev_info(const struct net_device
*dev
, const char *format
, ...);
4715 #define netdev_level_once(level, dev, fmt, ...) \
4717 static bool __print_once __read_mostly; \
4719 if (!__print_once) { \
4720 __print_once = true; \
4721 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4725 #define netdev_emerg_once(dev, fmt, ...) \
4726 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4727 #define netdev_alert_once(dev, fmt, ...) \
4728 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4729 #define netdev_crit_once(dev, fmt, ...) \
4730 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4731 #define netdev_err_once(dev, fmt, ...) \
4732 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4733 #define netdev_warn_once(dev, fmt, ...) \
4734 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4735 #define netdev_notice_once(dev, fmt, ...) \
4736 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4737 #define netdev_info_once(dev, fmt, ...) \
4738 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4740 #define MODULE_ALIAS_NETDEV(device) \
4741 MODULE_ALIAS("netdev-" device)
4743 #if defined(CONFIG_DYNAMIC_DEBUG)
4744 #define netdev_dbg(__dev, format, args...) \
4746 dynamic_netdev_dbg(__dev, format, ##args); \
4748 #elif defined(DEBUG)
4749 #define netdev_dbg(__dev, format, args...) \
4750 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4752 #define netdev_dbg(__dev, format, args...) \
4755 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4759 #if defined(VERBOSE_DEBUG)
4760 #define netdev_vdbg netdev_dbg
4763 #define netdev_vdbg(dev, format, args...) \
4766 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4772 * netdev_WARN() acts like dev_printk(), but with the key difference
4773 * of using a WARN/WARN_ON to get the message out, including the
4774 * file/line information and a backtrace.
4776 #define netdev_WARN(dev, format, args...) \
4777 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4778 netdev_reg_state(dev), ##args)
4780 #define netdev_WARN_ONCE(dev, format, args...) \
4781 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4782 netdev_reg_state(dev), ##args)
4784 /* netif printk helpers, similar to netdev_printk */
4786 #define netif_printk(priv, type, level, dev, fmt, args...) \
4788 if (netif_msg_##type(priv)) \
4789 netdev_printk(level, (dev), fmt, ##args); \
4792 #define netif_level(level, priv, type, dev, fmt, args...) \
4794 if (netif_msg_##type(priv)) \
4795 netdev_##level(dev, fmt, ##args); \
4798 #define netif_emerg(priv, type, dev, fmt, args...) \
4799 netif_level(emerg, priv, type, dev, fmt, ##args)
4800 #define netif_alert(priv, type, dev, fmt, args...) \
4801 netif_level(alert, priv, type, dev, fmt, ##args)
4802 #define netif_crit(priv, type, dev, fmt, args...) \
4803 netif_level(crit, priv, type, dev, fmt, ##args)
4804 #define netif_err(priv, type, dev, fmt, args...) \
4805 netif_level(err, priv, type, dev, fmt, ##args)
4806 #define netif_warn(priv, type, dev, fmt, args...) \
4807 netif_level(warn, priv, type, dev, fmt, ##args)
4808 #define netif_notice(priv, type, dev, fmt, args...) \
4809 netif_level(notice, priv, type, dev, fmt, ##args)
4810 #define netif_info(priv, type, dev, fmt, args...) \
4811 netif_level(info, priv, type, dev, fmt, ##args)
4813 #if defined(CONFIG_DYNAMIC_DEBUG)
4814 #define netif_dbg(priv, type, netdev, format, args...) \
4816 if (netif_msg_##type(priv)) \
4817 dynamic_netdev_dbg(netdev, format, ##args); \
4819 #elif defined(DEBUG)
4820 #define netif_dbg(priv, type, dev, format, args...) \
4821 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4823 #define netif_dbg(priv, type, dev, format, args...) \
4826 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4831 /* if @cond then downgrade to debug, else print at @level */
4832 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4835 netif_dbg(priv, type, netdev, fmt, ##args); \
4837 netif_ ## level(priv, type, netdev, fmt, ##args); \
4840 #if defined(VERBOSE_DEBUG)
4841 #define netif_vdbg netif_dbg
4843 #define netif_vdbg(priv, type, dev, format, args...) \
4846 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4852 * The list of packet types we will receive (as opposed to discard)
4853 * and the routines to invoke.
4855 * Why 16. Because with 16 the only overlap we get on a hash of the
4856 * low nibble of the protocol value is RARP/SNAP/X.25.
4870 #define PTYPE_HASH_SIZE (16)
4871 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4873 #endif /* _LINUX_NETDEVICE_H */