2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31 #include <linux/if_link.h>
34 #include <linux/pm_qos.h>
35 #include <linux/timer.h>
36 #include <linux/delay.h>
37 #include <linux/atomic.h>
38 #include <asm/cache.h>
39 #include <asm/byteorder.h>
41 #include <linux/device.h>
42 #include <linux/percpu.h>
43 #include <linux/rculist.h>
44 #include <linux/dmaengine.h>
45 #include <linux/workqueue.h>
46 #include <linux/dynamic_queue_limits.h>
48 #include <linux/ethtool.h>
49 #include <net/net_namespace.h>
52 #include <net/dcbnl.h>
54 #include <net/netprio_cgroup.h>
56 #include <linux/netdev_features.h>
62 /* source back-compat hooks */
63 #define SET_ETHTOOL_OPS(netdev,ops) \
64 ( (netdev)->ethtool_ops = (ops) )
66 /* hardware address assignment types */
67 #define NET_ADDR_PERM 0 /* address is permanent (default) */
68 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
69 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
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(), 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_POLICED 0x03 /* skb is shot by police */
97 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
99 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
100 * indicates that the device will soon be dropping packets, or already drops
101 * some packets of the same priority; prompting us to send less aggressively. */
102 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
103 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
105 /* Driver transmit return codes */
106 #define NETDEV_TX_MASK 0xf0
109 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
110 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
111 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
112 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
114 typedef enum netdev_tx netdev_tx_t
;
117 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
118 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
120 static inline bool dev_xmit_complete(int rc
)
123 * Positive cases with an skb consumed by a driver:
124 * - successful transmission (rc == NETDEV_TX_OK)
125 * - error while transmitting (rc < 0)
126 * - error while queueing to a different device (rc & NET_XMIT_MASK)
128 if (likely(rc
< NET_XMIT_MASK
))
136 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
138 /* Initial net device group. All devices belong to group 0 by default. */
139 #define INIT_NETDEV_GROUP 0
143 * Compute the worst case header length according to the protocols
147 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
148 # if defined(CONFIG_MAC80211_MESH)
149 # define LL_MAX_HEADER 128
151 # define LL_MAX_HEADER 96
153 #elif IS_ENABLED(CONFIG_TR)
154 # define LL_MAX_HEADER 48
156 # define LL_MAX_HEADER 32
159 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
160 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
161 #define MAX_HEADER LL_MAX_HEADER
163 #define MAX_HEADER (LL_MAX_HEADER + 48)
167 * Old network device statistics. Fields are native words
168 * (unsigned long) so they can be read and written atomically.
171 struct net_device_stats
{
172 unsigned long rx_packets
;
173 unsigned long tx_packets
;
174 unsigned long rx_bytes
;
175 unsigned long tx_bytes
;
176 unsigned long rx_errors
;
177 unsigned long tx_errors
;
178 unsigned long rx_dropped
;
179 unsigned long tx_dropped
;
180 unsigned long multicast
;
181 unsigned long collisions
;
182 unsigned long rx_length_errors
;
183 unsigned long rx_over_errors
;
184 unsigned long rx_crc_errors
;
185 unsigned long rx_frame_errors
;
186 unsigned long rx_fifo_errors
;
187 unsigned long rx_missed_errors
;
188 unsigned long tx_aborted_errors
;
189 unsigned long tx_carrier_errors
;
190 unsigned long tx_fifo_errors
;
191 unsigned long tx_heartbeat_errors
;
192 unsigned long tx_window_errors
;
193 unsigned long rx_compressed
;
194 unsigned long tx_compressed
;
197 #endif /* __KERNEL__ */
200 /* Media selection options. */
213 #include <linux/cache.h>
214 #include <linux/skbuff.h>
217 #include <linux/jump_label.h>
218 extern struct jump_label_key rps_needed
;
225 struct netdev_hw_addr
{
226 struct list_head list
;
227 unsigned char addr
[MAX_ADDR_LEN
];
229 #define NETDEV_HW_ADDR_T_LAN 1
230 #define NETDEV_HW_ADDR_T_SAN 2
231 #define NETDEV_HW_ADDR_T_SLAVE 3
232 #define NETDEV_HW_ADDR_T_UNICAST 4
233 #define NETDEV_HW_ADDR_T_MULTICAST 5
237 struct rcu_head rcu_head
;
240 struct netdev_hw_addr_list
{
241 struct list_head list
;
245 #define netdev_hw_addr_list_count(l) ((l)->count)
246 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
247 #define netdev_hw_addr_list_for_each(ha, l) \
248 list_for_each_entry(ha, &(l)->list, list)
250 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
251 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
252 #define netdev_for_each_uc_addr(ha, dev) \
253 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
255 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
256 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
257 #define netdev_for_each_mc_addr(ha, dev) \
258 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
265 /* cached hardware header; allow for machine alignment needs. */
266 #define HH_DATA_MOD 16
267 #define HH_DATA_OFF(__len) \
268 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
269 #define HH_DATA_ALIGN(__len) \
270 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
271 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
274 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
276 * dev->hard_header_len ? (dev->hard_header_len +
277 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
279 * We could use other alignment values, but we must maintain the
280 * relationship HH alignment <= LL alignment.
282 #define LL_RESERVED_SPACE(dev) \
283 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
284 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
285 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
288 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
289 unsigned short type
, const void *daddr
,
290 const void *saddr
, unsigned len
);
291 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
292 int (*rebuild
)(struct sk_buff
*skb
);
293 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
294 void (*cache_update
)(struct hh_cache
*hh
,
295 const struct net_device
*dev
,
296 const unsigned char *haddr
);
299 /* These flag bits are private to the generic network queueing
300 * layer, they may not be explicitly referenced by any other
304 enum netdev_state_t
{
306 __LINK_STATE_PRESENT
,
307 __LINK_STATE_NOCARRIER
,
308 __LINK_STATE_LINKWATCH_PENDING
,
309 __LINK_STATE_DORMANT
,
314 * This structure holds at boot time configured netdevice settings. They
315 * are then used in the device probing.
317 struct netdev_boot_setup
{
321 #define NETDEV_BOOT_SETUP_MAX 8
323 extern int __init
netdev_boot_setup(char *str
);
326 * Structure for NAPI scheduling similar to tasklet but with weighting
329 /* The poll_list must only be managed by the entity which
330 * changes the state of the NAPI_STATE_SCHED bit. This means
331 * whoever atomically sets that bit can add this napi_struct
332 * to the per-cpu poll_list, and whoever clears that bit
333 * can remove from the list right before clearing the bit.
335 struct list_head poll_list
;
339 int (*poll
)(struct napi_struct
*, int);
340 #ifdef CONFIG_NETPOLL
341 spinlock_t poll_lock
;
345 unsigned int gro_count
;
347 struct net_device
*dev
;
348 struct list_head dev_list
;
349 struct sk_buff
*gro_list
;
354 NAPI_STATE_SCHED
, /* Poll is scheduled */
355 NAPI_STATE_DISABLE
, /* Disable pending */
356 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
366 typedef enum gro_result gro_result_t
;
369 * enum rx_handler_result - Possible return values for rx_handlers.
370 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
372 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
373 * case skb->dev was changed by rx_handler.
374 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
375 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
377 * rx_handlers are functions called from inside __netif_receive_skb(), to do
378 * special processing of the skb, prior to delivery to protocol handlers.
380 * Currently, a net_device can only have a single rx_handler registered. Trying
381 * to register a second rx_handler will return -EBUSY.
383 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
384 * To unregister a rx_handler on a net_device, use
385 * netdev_rx_handler_unregister().
387 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
390 * If the rx_handler consumed to skb in some way, it should return
391 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
392 * the skb to be delivered in some other ways.
394 * If the rx_handler changed skb->dev, to divert the skb to another
395 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
396 * new device will be called if it exists.
398 * If the rx_handler consider the skb should be ignored, it should return
399 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
400 * are registred on exact device (ptype->dev == skb->dev).
402 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
403 * delivered, it should return RX_HANDLER_PASS.
405 * A device without a registered rx_handler will behave as if rx_handler
406 * returned RX_HANDLER_PASS.
409 enum rx_handler_result
{
415 typedef enum rx_handler_result rx_handler_result_t
;
416 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
418 extern void __napi_schedule(struct napi_struct
*n
);
420 static inline int napi_disable_pending(struct napi_struct
*n
)
422 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
426 * napi_schedule_prep - check if napi can be scheduled
429 * Test if NAPI routine is already running, and if not mark
430 * it as running. This is used as a condition variable
431 * insure only one NAPI poll instance runs. We also make
432 * sure there is no pending NAPI disable.
434 static inline int napi_schedule_prep(struct napi_struct
*n
)
436 return !napi_disable_pending(n
) &&
437 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
441 * napi_schedule - schedule NAPI poll
444 * Schedule NAPI poll routine to be called if it is not already
447 static inline void napi_schedule(struct napi_struct
*n
)
449 if (napi_schedule_prep(n
))
453 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
454 static inline int napi_reschedule(struct napi_struct
*napi
)
456 if (napi_schedule_prep(napi
)) {
457 __napi_schedule(napi
);
464 * napi_complete - NAPI processing complete
467 * Mark NAPI processing as complete.
469 extern void __napi_complete(struct napi_struct
*n
);
470 extern void napi_complete(struct napi_struct
*n
);
473 * napi_disable - prevent NAPI from scheduling
476 * Stop NAPI from being scheduled on this context.
477 * Waits till any outstanding processing completes.
479 static inline void napi_disable(struct napi_struct
*n
)
481 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
482 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
484 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
488 * napi_enable - enable NAPI scheduling
491 * Resume NAPI from being scheduled on this context.
492 * Must be paired with napi_disable.
494 static inline void napi_enable(struct napi_struct
*n
)
496 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
497 smp_mb__before_clear_bit();
498 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
503 * napi_synchronize - wait until NAPI is not running
506 * Wait until NAPI is done being scheduled on this context.
507 * Waits till any outstanding processing completes but
508 * does not disable future activations.
510 static inline void napi_synchronize(const struct napi_struct
*n
)
512 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
516 # define napi_synchronize(n) barrier()
519 enum netdev_queue_state_t
{
520 __QUEUE_STATE_DRV_XOFF
,
521 __QUEUE_STATE_STACK_XOFF
,
522 __QUEUE_STATE_FROZEN
,
523 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
524 (1 << __QUEUE_STATE_STACK_XOFF))
525 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
526 (1 << __QUEUE_STATE_FROZEN))
529 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
530 * netif_tx_* functions below are used to manipulate this flag. The
531 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
532 * queue independently. The netif_xmit_*stopped functions below are called
533 * to check if the queue has been stopped by the driver or stack (either
534 * of the XOFF bits are set in the state). Drivers should not need to call
535 * netif_xmit*stopped functions, they should only be using netif_tx_*.
538 struct netdev_queue
{
542 struct net_device
*dev
;
544 struct Qdisc
*qdisc_sleeping
;
548 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
554 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
557 * please use this field instead of dev->trans_start
559 unsigned long trans_start
;
562 * Number of TX timeouts for this queue
563 * (/sys/class/net/DEV/Q/trans_timeout)
565 unsigned long trans_timeout
;
572 } ____cacheline_aligned_in_smp
;
574 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
576 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
583 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
585 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
592 * This structure holds an RPS map which can be of variable length. The
593 * map is an array of CPUs.
600 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
603 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
604 * tail pointer for that CPU's input queue at the time of last enqueue, and
605 * a hardware filter index.
607 struct rps_dev_flow
{
610 unsigned int last_qtail
;
612 #define RPS_NO_FILTER 0xffff
615 * The rps_dev_flow_table structure contains a table of flow mappings.
617 struct rps_dev_flow_table
{
620 struct work_struct free_work
;
621 struct rps_dev_flow flows
[0];
623 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
624 ((_num) * sizeof(struct rps_dev_flow)))
627 * The rps_sock_flow_table contains mappings of flows to the last CPU
628 * on which they were processed by the application (set in recvmsg).
630 struct rps_sock_flow_table
{
634 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
635 ((_num) * sizeof(u16)))
637 #define RPS_NO_CPU 0xffff
639 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
643 unsigned int cpu
, index
= hash
& table
->mask
;
645 /* We only give a hint, preemption can change cpu under us */
646 cpu
= raw_smp_processor_id();
648 if (table
->ents
[index
] != cpu
)
649 table
->ents
[index
] = cpu
;
653 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
657 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
660 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
662 #ifdef CONFIG_RFS_ACCEL
663 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
664 u32 flow_id
, u16 filter_id
);
667 /* This structure contains an instance of an RX queue. */
668 struct netdev_rx_queue
{
669 struct rps_map __rcu
*rps_map
;
670 struct rps_dev_flow_table __rcu
*rps_flow_table
;
672 struct net_device
*dev
;
673 } ____cacheline_aligned_in_smp
;
674 #endif /* CONFIG_RPS */
678 * This structure holds an XPS map which can be of variable length. The
679 * map is an array of queues.
683 unsigned int alloc_len
;
687 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
688 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
692 * This structure holds all XPS maps for device. Maps are indexed by CPU.
694 struct xps_dev_maps
{
696 struct xps_map __rcu
*cpu_map
[0];
698 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
699 (nr_cpu_ids * sizeof(struct xps_map *)))
700 #endif /* CONFIG_XPS */
702 #define TC_MAX_QUEUE 16
703 #define TC_BITMASK 15
704 /* HW offloaded queuing disciplines txq count and offset maps */
705 struct netdev_tc_txq
{
710 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
712 * This structure is to hold information about the device
713 * configured to run FCoE protocol stack.
715 struct netdev_fcoe_hbainfo
{
716 char manufacturer
[64];
717 char serial_number
[64];
718 char hardware_version
[64];
719 char driver_version
[64];
720 char optionrom_version
[64];
721 char firmware_version
[64];
723 char model_description
[256];
728 * This structure defines the management hooks for network devices.
729 * The following hooks can be defined; unless noted otherwise, they are
730 * optional and can be filled with a null pointer.
732 * int (*ndo_init)(struct net_device *dev);
733 * This function is called once when network device is registered.
734 * The network device can use this to any late stage initializaton
735 * or semantic validattion. It can fail with an error code which will
736 * be propogated back to register_netdev
738 * void (*ndo_uninit)(struct net_device *dev);
739 * This function is called when device is unregistered or when registration
740 * fails. It is not called if init fails.
742 * int (*ndo_open)(struct net_device *dev);
743 * This function is called when network device transistions to the up
746 * int (*ndo_stop)(struct net_device *dev);
747 * This function is called when network device transistions to the down
750 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
751 * struct net_device *dev);
752 * Called when a packet needs to be transmitted.
753 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
754 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
755 * Required can not be NULL.
757 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
758 * Called to decide which queue to when device supports multiple
761 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
762 * This function is called to allow device receiver to make
763 * changes to configuration when multicast or promiscious is enabled.
765 * void (*ndo_set_rx_mode)(struct net_device *dev);
766 * This function is called device changes address list filtering.
767 * If driver handles unicast address filtering, it should set
768 * IFF_UNICAST_FLT to its priv_flags.
770 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
771 * This function is called when the Media Access Control address
772 * needs to be changed. If this interface is not defined, the
773 * mac address can not be changed.
775 * int (*ndo_validate_addr)(struct net_device *dev);
776 * Test if Media Access Control address is valid for the device.
778 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
779 * Called when a user request an ioctl which can't be handled by
780 * the generic interface code. If not defined ioctl's return
781 * not supported error code.
783 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
784 * Used to set network devices bus interface parameters. This interface
785 * is retained for legacy reason, new devices should use the bus
786 * interface (PCI) for low level management.
788 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
789 * Called when a user wants to change the Maximum Transfer Unit
790 * of a device. If not defined, any request to change MTU will
791 * will return an error.
793 * void (*ndo_tx_timeout)(struct net_device *dev);
794 * Callback uses when the transmitter has not made any progress
795 * for dev->watchdog ticks.
797 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
798 * struct rtnl_link_stats64 *storage);
799 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
800 * Called when a user wants to get the network device usage
801 * statistics. Drivers must do one of the following:
802 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
803 * rtnl_link_stats64 structure passed by the caller.
804 * 2. Define @ndo_get_stats to update a net_device_stats structure
805 * (which should normally be dev->stats) and return a pointer to
806 * it. The structure may be changed asynchronously only if each
807 * field is written atomically.
808 * 3. Update dev->stats asynchronously and atomically, and define
811 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
812 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
813 * this function is called when a VLAN id is registered.
815 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
816 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
817 * this function is called when a VLAN id is unregistered.
819 * void (*ndo_poll_controller)(struct net_device *dev);
821 * SR-IOV management functions.
822 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
823 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
824 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
825 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
826 * int (*ndo_get_vf_config)(struct net_device *dev,
827 * int vf, struct ifla_vf_info *ivf);
828 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
829 * struct nlattr *port[]);
830 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
831 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
832 * Called to setup 'tc' number of traffic classes in the net device. This
833 * is always called from the stack with the rtnl lock held and netif tx
834 * queues stopped. This allows the netdevice to perform queue management
837 * Fiber Channel over Ethernet (FCoE) offload functions.
838 * int (*ndo_fcoe_enable)(struct net_device *dev);
839 * Called when the FCoE protocol stack wants to start using LLD for FCoE
840 * so the underlying device can perform whatever needed configuration or
841 * initialization to support acceleration of FCoE traffic.
843 * int (*ndo_fcoe_disable)(struct net_device *dev);
844 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
845 * so the underlying device can perform whatever needed clean-ups to
846 * stop supporting acceleration of FCoE traffic.
848 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
849 * struct scatterlist *sgl, unsigned int sgc);
850 * Called when the FCoE Initiator wants to initialize an I/O that
851 * is a possible candidate for Direct Data Placement (DDP). The LLD can
852 * perform necessary setup and returns 1 to indicate the device is set up
853 * successfully to perform DDP on this I/O, otherwise this returns 0.
855 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
856 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
857 * indicated by the FC exchange id 'xid', so the underlying device can
858 * clean up and reuse resources for later DDP requests.
860 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
861 * struct scatterlist *sgl, unsigned int sgc);
862 * Called when the FCoE Target wants to initialize an I/O that
863 * is a possible candidate for Direct Data Placement (DDP). The LLD can
864 * perform necessary setup and returns 1 to indicate the device is set up
865 * successfully to perform DDP on this I/O, otherwise this returns 0.
867 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
868 * struct netdev_fcoe_hbainfo *hbainfo);
869 * Called when the FCoE Protocol stack wants information on the underlying
870 * device. This information is utilized by the FCoE protocol stack to
871 * register attributes with Fiber Channel management service as per the
872 * FC-GS Fabric Device Management Information(FDMI) specification.
874 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
875 * Called when the underlying device wants to override default World Wide
876 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
877 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
878 * protocol stack to use.
881 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
882 * u16 rxq_index, u32 flow_id);
883 * Set hardware filter for RFS. rxq_index is the target queue index;
884 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
885 * Return the filter ID on success, or a negative error code.
887 * Slave management functions (for bridge, bonding, etc). User should
888 * call netdev_set_master() to set dev->master properly.
889 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
890 * Called to make another netdev an underling.
892 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
893 * Called to release previously enslaved netdev.
895 * Feature/offload setting functions.
896 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
897 * netdev_features_t features);
898 * Adjusts the requested feature flags according to device-specific
899 * constraints, and returns the resulting flags. Must not modify
902 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
903 * Called to update device configuration to new features. Passed
904 * feature set might be less than what was returned by ndo_fix_features()).
905 * Must return >0 or -errno if it changed dev->features itself.
908 struct net_device_ops
{
909 int (*ndo_init
)(struct net_device
*dev
);
910 void (*ndo_uninit
)(struct net_device
*dev
);
911 int (*ndo_open
)(struct net_device
*dev
);
912 int (*ndo_stop
)(struct net_device
*dev
);
913 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
914 struct net_device
*dev
);
915 u16 (*ndo_select_queue
)(struct net_device
*dev
,
916 struct sk_buff
*skb
);
917 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
919 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
920 int (*ndo_set_mac_address
)(struct net_device
*dev
,
922 int (*ndo_validate_addr
)(struct net_device
*dev
);
923 int (*ndo_do_ioctl
)(struct net_device
*dev
,
924 struct ifreq
*ifr
, int cmd
);
925 int (*ndo_set_config
)(struct net_device
*dev
,
927 int (*ndo_change_mtu
)(struct net_device
*dev
,
929 int (*ndo_neigh_setup
)(struct net_device
*dev
,
930 struct neigh_parms
*);
931 void (*ndo_tx_timeout
) (struct net_device
*dev
);
933 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
934 struct rtnl_link_stats64
*storage
);
935 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
937 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
939 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
941 #ifdef CONFIG_NET_POLL_CONTROLLER
942 void (*ndo_poll_controller
)(struct net_device
*dev
);
943 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
944 struct netpoll_info
*info
);
945 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
947 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
949 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
950 int queue
, u16 vlan
, u8 qos
);
951 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
953 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
954 int vf
, bool setting
);
955 int (*ndo_get_vf_config
)(struct net_device
*dev
,
957 struct ifla_vf_info
*ivf
);
958 int (*ndo_set_vf_port
)(struct net_device
*dev
,
960 struct nlattr
*port
[]);
961 int (*ndo_get_vf_port
)(struct net_device
*dev
,
962 int vf
, struct sk_buff
*skb
);
963 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
964 #if IS_ENABLED(CONFIG_FCOE)
965 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
966 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
967 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
969 struct scatterlist
*sgl
,
971 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
973 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
975 struct scatterlist
*sgl
,
977 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
978 struct netdev_fcoe_hbainfo
*hbainfo
);
981 #if IS_ENABLED(CONFIG_LIBFCOE)
982 #define NETDEV_FCOE_WWNN 0
983 #define NETDEV_FCOE_WWPN 1
984 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
988 #ifdef CONFIG_RFS_ACCEL
989 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
990 const struct sk_buff
*skb
,
994 int (*ndo_add_slave
)(struct net_device
*dev
,
995 struct net_device
*slave_dev
);
996 int (*ndo_del_slave
)(struct net_device
*dev
,
997 struct net_device
*slave_dev
);
998 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
999 netdev_features_t features
);
1000 int (*ndo_set_features
)(struct net_device
*dev
,
1001 netdev_features_t features
);
1002 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1003 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1007 * The DEVICE structure.
1008 * Actually, this whole structure is a big mistake. It mixes I/O
1009 * data with strictly "high-level" data, and it has to know about
1010 * almost every data structure used in the INET module.
1012 * FIXME: cleanup struct net_device such that network protocol info
1019 * This is the first field of the "visible" part of this structure
1020 * (i.e. as seen by users in the "Space.c" file). It is the name
1023 char name
[IFNAMSIZ
];
1025 struct pm_qos_request pm_qos_req
;
1027 /* device name hash chain */
1028 struct hlist_node name_hlist
;
1033 * I/O specific fields
1034 * FIXME: Merge these and struct ifmap into one
1036 unsigned long mem_end
; /* shared mem end */
1037 unsigned long mem_start
; /* shared mem start */
1038 unsigned long base_addr
; /* device I/O address */
1039 unsigned int irq
; /* device IRQ number */
1042 * Some hardware also needs these fields, but they are not
1043 * part of the usual set specified in Space.c.
1046 unsigned long state
;
1048 struct list_head dev_list
;
1049 struct list_head napi_list
;
1050 struct list_head unreg_list
;
1052 /* currently active device features */
1053 netdev_features_t features
;
1054 /* user-changeable features */
1055 netdev_features_t hw_features
;
1056 /* user-requested features */
1057 netdev_features_t wanted_features
;
1058 /* mask of features inheritable by VLAN devices */
1059 netdev_features_t vlan_features
;
1061 /* Interface index. Unique device identifier */
1065 struct net_device_stats stats
;
1066 atomic_long_t rx_dropped
; /* dropped packets by core network
1067 * Do not use this in drivers.
1070 #ifdef CONFIG_WIRELESS_EXT
1071 /* List of functions to handle Wireless Extensions (instead of ioctl).
1072 * See <net/iw_handler.h> for details. Jean II */
1073 const struct iw_handler_def
* wireless_handlers
;
1074 /* Instance data managed by the core of Wireless Extensions. */
1075 struct iw_public_data
* wireless_data
;
1077 /* Management operations */
1078 const struct net_device_ops
*netdev_ops
;
1079 const struct ethtool_ops
*ethtool_ops
;
1081 /* Hardware header description */
1082 const struct header_ops
*header_ops
;
1084 unsigned int flags
; /* interface flags (a la BSD) */
1085 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace. */
1086 unsigned short gflags
;
1087 unsigned short padded
; /* How much padding added by alloc_netdev() */
1089 unsigned char operstate
; /* RFC2863 operstate */
1090 unsigned char link_mode
; /* mapping policy to operstate */
1092 unsigned char if_port
; /* Selectable AUI, TP,..*/
1093 unsigned char dma
; /* DMA channel */
1095 unsigned int mtu
; /* interface MTU value */
1096 unsigned short type
; /* interface hardware type */
1097 unsigned short hard_header_len
; /* hardware hdr length */
1099 /* extra head- and tailroom the hardware may need, but not in all cases
1100 * can this be guaranteed, especially tailroom. Some cases also use
1101 * LL_MAX_HEADER instead to allocate the skb.
1103 unsigned short needed_headroom
;
1104 unsigned short needed_tailroom
;
1106 /* Interface address info. */
1107 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1108 unsigned char addr_assign_type
; /* hw address assignment type */
1109 unsigned char addr_len
; /* hardware address length */
1110 unsigned char neigh_priv_len
;
1111 unsigned short dev_id
; /* for shared network cards */
1113 spinlock_t addr_list_lock
;
1114 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1115 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1117 unsigned int promiscuity
;
1118 unsigned int allmulti
;
1121 /* Protocol specific pointers */
1123 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1124 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1126 #if IS_ENABLED(CONFIG_NET_DSA)
1127 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1129 void *atalk_ptr
; /* AppleTalk link */
1130 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1131 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1132 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1133 void *ec_ptr
; /* Econet specific data */
1134 void *ax25_ptr
; /* AX.25 specific data */
1135 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1136 assign before registering */
1139 * Cache lines mostly used on receive path (including eth_type_trans())
1141 unsigned long last_rx
; /* Time of last Rx
1142 * This should not be set in
1143 * drivers, unless really needed,
1144 * because network stack (bonding)
1145 * use it if/when necessary, to
1146 * avoid dirtying this cache line.
1149 struct net_device
*master
; /* Pointer to master device of a group,
1150 * which this device is member of.
1153 /* Interface address info used in eth_type_trans() */
1154 unsigned char *dev_addr
; /* hw address, (before bcast
1155 because most packets are
1158 struct netdev_hw_addr_list dev_addrs
; /* list of device
1161 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1164 struct kset
*queues_kset
;
1168 struct netdev_rx_queue
*_rx
;
1170 /* Number of RX queues allocated at register_netdev() time */
1171 unsigned int num_rx_queues
;
1173 /* Number of RX queues currently active in device */
1174 unsigned int real_num_rx_queues
;
1176 #ifdef CONFIG_RFS_ACCEL
1177 /* CPU reverse-mapping for RX completion interrupts, indexed
1178 * by RX queue number. Assigned by driver. This must only be
1179 * set if the ndo_rx_flow_steer operation is defined. */
1180 struct cpu_rmap
*rx_cpu_rmap
;
1184 rx_handler_func_t __rcu
*rx_handler
;
1185 void __rcu
*rx_handler_data
;
1187 struct netdev_queue __rcu
*ingress_queue
;
1190 * Cache lines mostly used on transmit path
1192 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1194 /* Number of TX queues allocated at alloc_netdev_mq() time */
1195 unsigned int num_tx_queues
;
1197 /* Number of TX queues currently active in device */
1198 unsigned int real_num_tx_queues
;
1200 /* root qdisc from userspace point of view */
1201 struct Qdisc
*qdisc
;
1203 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1204 spinlock_t tx_global_lock
;
1207 struct xps_dev_maps __rcu
*xps_maps
;
1210 /* These may be needed for future network-power-down code. */
1213 * trans_start here is expensive for high speed devices on SMP,
1214 * please use netdev_queue->trans_start instead.
1216 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1218 int watchdog_timeo
; /* used by dev_watchdog() */
1219 struct timer_list watchdog_timer
;
1221 /* Number of references to this device */
1222 int __percpu
*pcpu_refcnt
;
1224 /* delayed register/unregister */
1225 struct list_head todo_list
;
1226 /* device index hash chain */
1227 struct hlist_node index_hlist
;
1229 struct list_head link_watch_list
;
1231 /* register/unregister state machine */
1232 enum { NETREG_UNINITIALIZED
=0,
1233 NETREG_REGISTERED
, /* completed register_netdevice */
1234 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1235 NETREG_UNREGISTERED
, /* completed unregister todo */
1236 NETREG_RELEASED
, /* called free_netdev */
1237 NETREG_DUMMY
, /* dummy device for NAPI poll */
1240 bool dismantle
; /* device is going do be freed */
1243 RTNL_LINK_INITIALIZED
,
1244 RTNL_LINK_INITIALIZING
,
1245 } rtnl_link_state
:16;
1247 /* Called from unregister, can be used to call free_netdev */
1248 void (*destructor
)(struct net_device
*dev
);
1250 #ifdef CONFIG_NETPOLL
1251 struct netpoll_info
*npinfo
;
1254 #ifdef CONFIG_NET_NS
1255 /* Network namespace this network device is inside */
1259 /* mid-layer private */
1262 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1263 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1264 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1267 struct garp_port __rcu
*garp_port
;
1269 /* class/net/name entry */
1271 /* space for optional device, statistics, and wireless sysfs groups */
1272 const struct attribute_group
*sysfs_groups
[4];
1274 /* rtnetlink link ops */
1275 const struct rtnl_link_ops
*rtnl_link_ops
;
1277 /* for setting kernel sock attribute on TCP connection setup */
1278 #define GSO_MAX_SIZE 65536
1279 unsigned int gso_max_size
;
1282 /* Data Center Bridging netlink ops */
1283 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1286 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1287 u8 prio_tc_map
[TC_BITMASK
+ 1];
1289 #if IS_ENABLED(CONFIG_FCOE)
1290 /* max exchange id for FCoE LRO by ddp */
1291 unsigned int fcoe_ddp_xid
;
1293 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1294 struct netprio_map __rcu
*priomap
;
1296 /* phy device may attach itself for hardware timestamping */
1297 struct phy_device
*phydev
;
1299 /* group the device belongs to */
1302 #define to_net_dev(d) container_of(d, struct net_device, dev)
1304 #define NETDEV_ALIGN 32
1307 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1309 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1313 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1315 if (tc
>= dev
->num_tc
)
1318 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1323 void netdev_reset_tc(struct net_device
*dev
)
1326 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1327 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1331 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1333 if (tc
>= dev
->num_tc
)
1336 dev
->tc_to_txq
[tc
].count
= count
;
1337 dev
->tc_to_txq
[tc
].offset
= offset
;
1342 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1344 if (num_tc
> TC_MAX_QUEUE
)
1347 dev
->num_tc
= num_tc
;
1352 int netdev_get_num_tc(struct net_device
*dev
)
1358 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1361 return &dev
->_tx
[index
];
1364 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1365 void (*f
)(struct net_device
*,
1366 struct netdev_queue
*,
1372 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1373 f(dev
, &dev
->_tx
[i
], arg
);
1377 * Net namespace inlines
1380 struct net
*dev_net(const struct net_device
*dev
)
1382 return read_pnet(&dev
->nd_net
);
1386 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1388 #ifdef CONFIG_NET_NS
1389 release_net(dev
->nd_net
);
1390 dev
->nd_net
= hold_net(net
);
1394 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1396 #ifdef CONFIG_NET_DSA_TAG_DSA
1397 if (dev
->dsa_ptr
!= NULL
)
1398 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1404 #ifndef CONFIG_NET_NS
1405 static inline void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
)
1409 #else /* CONFIG_NET_NS */
1410 void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
);
1413 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1415 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1416 if (dev
->dsa_ptr
!= NULL
)
1417 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1424 * netdev_priv - access network device private data
1425 * @dev: network device
1427 * Get network device private data
1429 static inline void *netdev_priv(const struct net_device
*dev
)
1431 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1434 /* Set the sysfs physical device reference for the network logical device
1435 * if set prior to registration will cause a symlink during initialization.
1437 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1439 /* Set the sysfs device type for the network logical device to allow
1440 * fin grained indentification of different network device types. For
1441 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1443 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1446 * netif_napi_add - initialize a napi context
1447 * @dev: network device
1448 * @napi: napi context
1449 * @poll: polling function
1450 * @weight: default weight
1452 * netif_napi_add() must be used to initialize a napi context prior to calling
1453 * *any* of the other napi related functions.
1455 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1456 int (*poll
)(struct napi_struct
*, int), int weight
);
1459 * netif_napi_del - remove a napi context
1460 * @napi: napi context
1462 * netif_napi_del() removes a napi context from the network device napi list
1464 void netif_napi_del(struct napi_struct
*napi
);
1466 struct napi_gro_cb
{
1467 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1470 /* Length of frag0. */
1471 unsigned int frag0_len
;
1473 /* This indicates where we are processing relative to skb->data. */
1476 /* This is non-zero if the packet may be of the same flow. */
1479 /* This is non-zero if the packet cannot be merged with the new skb. */
1482 /* Number of segments aggregated. */
1489 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1491 struct packet_type
{
1492 __be16 type
; /* This is really htons(ether_type). */
1493 struct net_device
*dev
; /* NULL is wildcarded here */
1494 int (*func
) (struct sk_buff
*,
1495 struct net_device
*,
1496 struct packet_type
*,
1497 struct net_device
*);
1498 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1499 netdev_features_t features
);
1500 int (*gso_send_check
)(struct sk_buff
*skb
);
1501 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1502 struct sk_buff
*skb
);
1503 int (*gro_complete
)(struct sk_buff
*skb
);
1504 void *af_packet_priv
;
1505 struct list_head list
;
1508 #include <linux/notifier.h>
1510 /* netdevice notifier chain. Please remember to update the rtnetlink
1511 * notification exclusion list in rtnetlink_event() when adding new
1514 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1515 #define NETDEV_DOWN 0x0002
1516 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1517 detected a hardware crash and restarted
1518 - we can use this eg to kick tcp sessions
1520 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1521 #define NETDEV_REGISTER 0x0005
1522 #define NETDEV_UNREGISTER 0x0006
1523 #define NETDEV_CHANGEMTU 0x0007
1524 #define NETDEV_CHANGEADDR 0x0008
1525 #define NETDEV_GOING_DOWN 0x0009
1526 #define NETDEV_CHANGENAME 0x000A
1527 #define NETDEV_FEAT_CHANGE 0x000B
1528 #define NETDEV_BONDING_FAILOVER 0x000C
1529 #define NETDEV_PRE_UP 0x000D
1530 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1531 #define NETDEV_POST_TYPE_CHANGE 0x000F
1532 #define NETDEV_POST_INIT 0x0010
1533 #define NETDEV_UNREGISTER_BATCH 0x0011
1534 #define NETDEV_RELEASE 0x0012
1535 #define NETDEV_NOTIFY_PEERS 0x0013
1536 #define NETDEV_JOIN 0x0014
1538 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1539 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1540 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1543 extern rwlock_t dev_base_lock
; /* Device list lock */
1546 #define for_each_netdev(net, d) \
1547 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1548 #define for_each_netdev_reverse(net, d) \
1549 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1550 #define for_each_netdev_rcu(net, d) \
1551 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1552 #define for_each_netdev_safe(net, d, n) \
1553 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1554 #define for_each_netdev_continue(net, d) \
1555 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1556 #define for_each_netdev_continue_rcu(net, d) \
1557 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1558 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1560 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1562 struct list_head
*lh
;
1566 lh
= dev
->dev_list
.next
;
1567 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1570 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1572 struct list_head
*lh
;
1576 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1577 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1580 static inline struct net_device
*first_net_device(struct net
*net
)
1582 return list_empty(&net
->dev_base_head
) ? NULL
:
1583 net_device_entry(net
->dev_base_head
.next
);
1586 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1588 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1590 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1593 extern int netdev_boot_setup_check(struct net_device
*dev
);
1594 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1595 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1596 const char *hwaddr
);
1597 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1598 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1599 extern void dev_add_pack(struct packet_type
*pt
);
1600 extern void dev_remove_pack(struct packet_type
*pt
);
1601 extern void __dev_remove_pack(struct packet_type
*pt
);
1603 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1604 unsigned short mask
);
1605 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1606 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1607 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1608 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1609 extern int dev_open(struct net_device
*dev
);
1610 extern int dev_close(struct net_device
*dev
);
1611 extern void dev_disable_lro(struct net_device
*dev
);
1612 extern int dev_queue_xmit(struct sk_buff
*skb
);
1613 extern int register_netdevice(struct net_device
*dev
);
1614 extern void unregister_netdevice_queue(struct net_device
*dev
,
1615 struct list_head
*head
);
1616 extern void unregister_netdevice_many(struct list_head
*head
);
1617 static inline void unregister_netdevice(struct net_device
*dev
)
1619 unregister_netdevice_queue(dev
, NULL
);
1622 extern int netdev_refcnt_read(const struct net_device
*dev
);
1623 extern void free_netdev(struct net_device
*dev
);
1624 extern void synchronize_net(void);
1625 extern int init_dummy_netdev(struct net_device
*dev
);
1626 extern void netdev_resync_ops(struct net_device
*dev
);
1628 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1629 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1630 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1631 extern int dev_restart(struct net_device
*dev
);
1632 #ifdef CONFIG_NETPOLL_TRAP
1633 extern int netpoll_trap(void);
1635 extern int skb_gro_receive(struct sk_buff
**head
,
1636 struct sk_buff
*skb
);
1637 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1639 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1641 return NAPI_GRO_CB(skb
)->data_offset
;
1644 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1646 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1649 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1651 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1654 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1655 unsigned int offset
)
1657 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1660 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1662 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1665 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1666 unsigned int offset
)
1668 if (!pskb_may_pull(skb
, hlen
))
1671 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1672 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1673 return skb
->data
+ offset
;
1676 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1678 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1681 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1683 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1684 skb_network_offset(skb
);
1687 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1688 unsigned short type
,
1689 const void *daddr
, const void *saddr
,
1692 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1695 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1698 static inline int dev_parse_header(const struct sk_buff
*skb
,
1699 unsigned char *haddr
)
1701 const struct net_device
*dev
= skb
->dev
;
1703 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1705 return dev
->header_ops
->parse(skb
, haddr
);
1708 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1709 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1710 static inline int unregister_gifconf(unsigned int family
)
1712 return register_gifconf(family
, NULL
);
1716 * Incoming packets are placed on per-cpu queues
1718 struct softnet_data
{
1719 struct Qdisc
*output_queue
;
1720 struct Qdisc
**output_queue_tailp
;
1721 struct list_head poll_list
;
1722 struct sk_buff
*completion_queue
;
1723 struct sk_buff_head process_queue
;
1726 unsigned int processed
;
1727 unsigned int time_squeeze
;
1728 unsigned int cpu_collision
;
1729 unsigned int received_rps
;
1732 struct softnet_data
*rps_ipi_list
;
1734 /* Elements below can be accessed between CPUs for RPS */
1735 struct call_single_data csd ____cacheline_aligned_in_smp
;
1736 struct softnet_data
*rps_ipi_next
;
1738 unsigned int input_queue_head
;
1739 unsigned int input_queue_tail
;
1742 struct sk_buff_head input_pkt_queue
;
1743 struct napi_struct backlog
;
1746 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1749 sd
->input_queue_head
++;
1753 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1754 unsigned int *qtail
)
1757 *qtail
= ++sd
->input_queue_tail
;
1761 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1763 extern void __netif_schedule(struct Qdisc
*q
);
1765 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1767 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1768 __netif_schedule(txq
->qdisc
);
1771 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1775 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1776 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1779 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1781 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1785 * netif_start_queue - allow transmit
1786 * @dev: network device
1788 * Allow upper layers to call the device hard_start_xmit routine.
1790 static inline void netif_start_queue(struct net_device
*dev
)
1792 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1795 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1799 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1800 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1801 netif_tx_start_queue(txq
);
1805 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1807 #ifdef CONFIG_NETPOLL_TRAP
1808 if (netpoll_trap()) {
1809 netif_tx_start_queue(dev_queue
);
1813 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1814 __netif_schedule(dev_queue
->qdisc
);
1818 * netif_wake_queue - restart transmit
1819 * @dev: network device
1821 * Allow upper layers to call the device hard_start_xmit routine.
1822 * Used for flow control when transmit resources are available.
1824 static inline void netif_wake_queue(struct net_device
*dev
)
1826 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1829 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1833 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1834 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1835 netif_tx_wake_queue(txq
);
1839 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1841 if (WARN_ON(!dev_queue
)) {
1842 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1845 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1849 * netif_stop_queue - stop transmitted packets
1850 * @dev: network device
1852 * Stop upper layers calling the device hard_start_xmit routine.
1853 * Used for flow control when transmit resources are unavailable.
1855 static inline void netif_stop_queue(struct net_device
*dev
)
1857 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1860 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1864 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1865 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1866 netif_tx_stop_queue(txq
);
1870 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1872 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1876 * netif_queue_stopped - test if transmit queue is flowblocked
1877 * @dev: network device
1879 * Test if transmit queue on device is currently unable to send.
1881 static inline int netif_queue_stopped(const struct net_device
*dev
)
1883 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1886 static inline int netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
1888 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
1891 static inline int netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
1893 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
1896 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
1900 dql_queued(&dev_queue
->dql
, bytes
);
1901 if (unlikely(dql_avail(&dev_queue
->dql
) < 0)) {
1902 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1903 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
1904 clear_bit(__QUEUE_STATE_STACK_XOFF
,
1910 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
1912 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
1915 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
1916 unsigned pkts
, unsigned bytes
)
1919 if (likely(bytes
)) {
1920 dql_completed(&dev_queue
->dql
, bytes
);
1921 if (unlikely(test_bit(__QUEUE_STATE_STACK_XOFF
,
1922 &dev_queue
->state
) &&
1923 dql_avail(&dev_queue
->dql
) >= 0)) {
1924 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
,
1926 netif_schedule_queue(dev_queue
);
1932 static inline void netdev_completed_queue(struct net_device
*dev
,
1933 unsigned pkts
, unsigned bytes
)
1935 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
1938 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
1945 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
1947 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
1951 * netif_running - test if up
1952 * @dev: network device
1954 * Test if the device has been brought up.
1956 static inline int netif_running(const struct net_device
*dev
)
1958 return test_bit(__LINK_STATE_START
, &dev
->state
);
1962 * Routines to manage the subqueues on a device. We only need start
1963 * stop, and a check if it's stopped. All other device management is
1964 * done at the overall netdevice level.
1965 * Also test the device if we're multiqueue.
1969 * netif_start_subqueue - allow sending packets on subqueue
1970 * @dev: network device
1971 * @queue_index: sub queue index
1973 * Start individual transmit queue of a device with multiple transmit queues.
1975 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1977 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1979 netif_tx_start_queue(txq
);
1983 * netif_stop_subqueue - stop sending packets on subqueue
1984 * @dev: network device
1985 * @queue_index: sub queue index
1987 * Stop individual transmit queue of a device with multiple transmit queues.
1989 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1991 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1992 #ifdef CONFIG_NETPOLL_TRAP
1996 netif_tx_stop_queue(txq
);
2000 * netif_subqueue_stopped - test status of subqueue
2001 * @dev: network device
2002 * @queue_index: sub queue index
2004 * Check individual transmit queue of a device with multiple transmit queues.
2006 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
2009 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2011 return netif_tx_queue_stopped(txq
);
2014 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
2015 struct sk_buff
*skb
)
2017 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2021 * netif_wake_subqueue - allow sending packets on subqueue
2022 * @dev: network device
2023 * @queue_index: sub queue index
2025 * Resume individual transmit queue of a device with multiple transmit queues.
2027 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2029 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2030 #ifdef CONFIG_NETPOLL_TRAP
2034 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2035 __netif_schedule(txq
->qdisc
);
2039 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2040 * as a distribution range limit for the returned value.
2042 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2043 const struct sk_buff
*skb
)
2045 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2049 * netif_is_multiqueue - test if device has multiple transmit queues
2050 * @dev: network device
2052 * Check if device has multiple transmit queues
2054 static inline int netif_is_multiqueue(const struct net_device
*dev
)
2056 return dev
->num_tx_queues
> 1;
2059 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
2063 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
2066 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2073 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2074 const struct net_device
*from_dev
)
2076 netif_set_real_num_tx_queues(to_dev
, from_dev
->real_num_tx_queues
);
2078 return netif_set_real_num_rx_queues(to_dev
,
2079 from_dev
->real_num_rx_queues
);
2085 /* Use this variant when it is known for sure that it
2086 * is executing from hardware interrupt context or with hardware interrupts
2089 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2091 /* Use this variant in places where it could be invoked
2092 * from either hardware interrupt or other context, with hardware interrupts
2093 * either disabled or enabled.
2095 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2097 extern int netif_rx(struct sk_buff
*skb
);
2098 extern int netif_rx_ni(struct sk_buff
*skb
);
2099 extern int netif_receive_skb(struct sk_buff
*skb
);
2100 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
2101 struct sk_buff
*skb
);
2102 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
2103 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2104 struct sk_buff
*skb
);
2105 extern void napi_gro_flush(struct napi_struct
*napi
);
2106 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2107 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
2108 struct sk_buff
*skb
,
2110 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
2111 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2113 static inline void napi_free_frags(struct napi_struct
*napi
)
2115 kfree_skb(napi
->skb
);
2119 extern int netdev_rx_handler_register(struct net_device
*dev
,
2120 rx_handler_func_t
*rx_handler
,
2121 void *rx_handler_data
);
2122 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2124 extern int dev_valid_name(const char *name
);
2125 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2126 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2127 extern unsigned dev_get_flags(const struct net_device
*);
2128 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2129 extern int dev_change_flags(struct net_device
*, unsigned);
2130 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2131 extern int dev_change_name(struct net_device
*, const char *);
2132 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2133 extern int dev_change_net_namespace(struct net_device
*,
2134 struct net
*, const char *);
2135 extern int dev_set_mtu(struct net_device
*, int);
2136 extern void dev_set_group(struct net_device
*, int);
2137 extern int dev_set_mac_address(struct net_device
*,
2139 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2140 struct net_device
*dev
,
2141 struct netdev_queue
*txq
);
2142 extern int dev_forward_skb(struct net_device
*dev
,
2143 struct sk_buff
*skb
);
2145 extern int netdev_budget
;
2147 /* Called by rtnetlink.c:rtnl_unlock() */
2148 extern void netdev_run_todo(void);
2151 * dev_put - release reference to device
2152 * @dev: network device
2154 * Release reference to device to allow it to be freed.
2156 static inline void dev_put(struct net_device
*dev
)
2158 this_cpu_dec(*dev
->pcpu_refcnt
);
2162 * dev_hold - get reference to device
2163 * @dev: network device
2165 * Hold reference to device to keep it from being freed.
2167 static inline void dev_hold(struct net_device
*dev
)
2169 this_cpu_inc(*dev
->pcpu_refcnt
);
2172 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2173 * and _off may be called from IRQ context, but it is caller
2174 * who is responsible for serialization of these calls.
2176 * The name carrier is inappropriate, these functions should really be
2177 * called netif_lowerlayer_*() because they represent the state of any
2178 * kind of lower layer not just hardware media.
2181 extern void linkwatch_fire_event(struct net_device
*dev
);
2182 extern void linkwatch_forget_dev(struct net_device
*dev
);
2185 * netif_carrier_ok - test if carrier present
2186 * @dev: network device
2188 * Check if carrier is present on device
2190 static inline int netif_carrier_ok(const struct net_device
*dev
)
2192 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2195 extern unsigned long dev_trans_start(struct net_device
*dev
);
2197 extern void __netdev_watchdog_up(struct net_device
*dev
);
2199 extern void netif_carrier_on(struct net_device
*dev
);
2201 extern void netif_carrier_off(struct net_device
*dev
);
2203 extern void netif_notify_peers(struct net_device
*dev
);
2206 * netif_dormant_on - mark device as dormant.
2207 * @dev: network device
2209 * Mark device as dormant (as per RFC2863).
2211 * The dormant state indicates that the relevant interface is not
2212 * actually in a condition to pass packets (i.e., it is not 'up') but is
2213 * in a "pending" state, waiting for some external event. For "on-
2214 * demand" interfaces, this new state identifies the situation where the
2215 * interface is waiting for events to place it in the up state.
2218 static inline void netif_dormant_on(struct net_device
*dev
)
2220 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2221 linkwatch_fire_event(dev
);
2225 * netif_dormant_off - set device as not dormant.
2226 * @dev: network device
2228 * Device is not in dormant state.
2230 static inline void netif_dormant_off(struct net_device
*dev
)
2232 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2233 linkwatch_fire_event(dev
);
2237 * netif_dormant - test if carrier present
2238 * @dev: network device
2240 * Check if carrier is present on device
2242 static inline int netif_dormant(const struct net_device
*dev
)
2244 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2249 * netif_oper_up - test if device is operational
2250 * @dev: network device
2252 * Check if carrier is operational
2254 static inline int netif_oper_up(const struct net_device
*dev
)
2256 return (dev
->operstate
== IF_OPER_UP
||
2257 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2261 * netif_device_present - is device available or removed
2262 * @dev: network device
2264 * Check if device has not been removed from system.
2266 static inline int netif_device_present(struct net_device
*dev
)
2268 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2271 extern void netif_device_detach(struct net_device
*dev
);
2273 extern void netif_device_attach(struct net_device
*dev
);
2276 * Network interface message level settings
2280 NETIF_MSG_DRV
= 0x0001,
2281 NETIF_MSG_PROBE
= 0x0002,
2282 NETIF_MSG_LINK
= 0x0004,
2283 NETIF_MSG_TIMER
= 0x0008,
2284 NETIF_MSG_IFDOWN
= 0x0010,
2285 NETIF_MSG_IFUP
= 0x0020,
2286 NETIF_MSG_RX_ERR
= 0x0040,
2287 NETIF_MSG_TX_ERR
= 0x0080,
2288 NETIF_MSG_TX_QUEUED
= 0x0100,
2289 NETIF_MSG_INTR
= 0x0200,
2290 NETIF_MSG_TX_DONE
= 0x0400,
2291 NETIF_MSG_RX_STATUS
= 0x0800,
2292 NETIF_MSG_PKTDATA
= 0x1000,
2293 NETIF_MSG_HW
= 0x2000,
2294 NETIF_MSG_WOL
= 0x4000,
2297 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2298 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2299 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2300 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2301 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2302 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2303 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2304 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2305 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2306 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2307 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2308 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2309 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2310 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2311 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2313 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2316 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2317 return default_msg_enable_bits
;
2318 if (debug_value
== 0) /* no output */
2320 /* set low N bits */
2321 return (1 << debug_value
) - 1;
2324 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2326 spin_lock(&txq
->_xmit_lock
);
2327 txq
->xmit_lock_owner
= cpu
;
2330 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2332 spin_lock_bh(&txq
->_xmit_lock
);
2333 txq
->xmit_lock_owner
= smp_processor_id();
2336 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
2338 int ok
= spin_trylock(&txq
->_xmit_lock
);
2340 txq
->xmit_lock_owner
= smp_processor_id();
2344 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2346 txq
->xmit_lock_owner
= -1;
2347 spin_unlock(&txq
->_xmit_lock
);
2350 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2352 txq
->xmit_lock_owner
= -1;
2353 spin_unlock_bh(&txq
->_xmit_lock
);
2356 static inline void txq_trans_update(struct netdev_queue
*txq
)
2358 if (txq
->xmit_lock_owner
!= -1)
2359 txq
->trans_start
= jiffies
;
2363 * netif_tx_lock - grab network device transmit lock
2364 * @dev: network device
2366 * Get network device transmit lock
2368 static inline void netif_tx_lock(struct net_device
*dev
)
2373 spin_lock(&dev
->tx_global_lock
);
2374 cpu
= smp_processor_id();
2375 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2376 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2378 /* We are the only thread of execution doing a
2379 * freeze, but we have to grab the _xmit_lock in
2380 * order to synchronize with threads which are in
2381 * the ->hard_start_xmit() handler and already
2382 * checked the frozen bit.
2384 __netif_tx_lock(txq
, cpu
);
2385 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2386 __netif_tx_unlock(txq
);
2390 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2396 static inline void netif_tx_unlock(struct net_device
*dev
)
2400 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2401 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2403 /* No need to grab the _xmit_lock here. If the
2404 * queue is not stopped for another reason, we
2407 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2408 netif_schedule_queue(txq
);
2410 spin_unlock(&dev
->tx_global_lock
);
2413 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2415 netif_tx_unlock(dev
);
2419 #define HARD_TX_LOCK(dev, txq, cpu) { \
2420 if ((dev->features & NETIF_F_LLTX) == 0) { \
2421 __netif_tx_lock(txq, cpu); \
2425 #define HARD_TX_UNLOCK(dev, txq) { \
2426 if ((dev->features & NETIF_F_LLTX) == 0) { \
2427 __netif_tx_unlock(txq); \
2431 static inline void netif_tx_disable(struct net_device
*dev
)
2437 cpu
= smp_processor_id();
2438 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2439 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2441 __netif_tx_lock(txq
, cpu
);
2442 netif_tx_stop_queue(txq
);
2443 __netif_tx_unlock(txq
);
2448 static inline void netif_addr_lock(struct net_device
*dev
)
2450 spin_lock(&dev
->addr_list_lock
);
2453 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2455 spin_lock_bh(&dev
->addr_list_lock
);
2458 static inline void netif_addr_unlock(struct net_device
*dev
)
2460 spin_unlock(&dev
->addr_list_lock
);
2463 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2465 spin_unlock_bh(&dev
->addr_list_lock
);
2469 * dev_addrs walker. Should be used only for read access. Call with
2470 * rcu_read_lock held.
2472 #define for_each_dev_addr(dev, ha) \
2473 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2475 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2477 extern void ether_setup(struct net_device
*dev
);
2479 /* Support for loadable net-drivers */
2480 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2481 void (*setup
)(struct net_device
*),
2482 unsigned int txqs
, unsigned int rxqs
);
2483 #define alloc_netdev(sizeof_priv, name, setup) \
2484 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2486 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2487 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2489 extern int register_netdev(struct net_device
*dev
);
2490 extern void unregister_netdev(struct net_device
*dev
);
2492 /* General hardware address lists handling functions */
2493 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2494 struct netdev_hw_addr_list
*from_list
,
2495 int addr_len
, unsigned char addr_type
);
2496 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2497 struct netdev_hw_addr_list
*from_list
,
2498 int addr_len
, unsigned char addr_type
);
2499 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2500 struct netdev_hw_addr_list
*from_list
,
2502 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2503 struct netdev_hw_addr_list
*from_list
,
2505 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2506 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2508 /* Functions used for device addresses handling */
2509 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2510 unsigned char addr_type
);
2511 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2512 unsigned char addr_type
);
2513 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2514 struct net_device
*from_dev
,
2515 unsigned char addr_type
);
2516 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2517 struct net_device
*from_dev
,
2518 unsigned char addr_type
);
2519 extern void dev_addr_flush(struct net_device
*dev
);
2520 extern int dev_addr_init(struct net_device
*dev
);
2522 /* Functions used for unicast addresses handling */
2523 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2524 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2525 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2526 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2527 extern void dev_uc_flush(struct net_device
*dev
);
2528 extern void dev_uc_init(struct net_device
*dev
);
2530 /* Functions used for multicast addresses handling */
2531 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2532 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2533 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2534 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2535 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2536 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2537 extern void dev_mc_flush(struct net_device
*dev
);
2538 extern void dev_mc_init(struct net_device
*dev
);
2540 /* Functions used for secondary unicast and multicast support */
2541 extern void dev_set_rx_mode(struct net_device
*dev
);
2542 extern void __dev_set_rx_mode(struct net_device
*dev
);
2543 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2544 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2545 extern void netdev_state_change(struct net_device
*dev
);
2546 extern int netdev_bonding_change(struct net_device
*dev
,
2547 unsigned long event
);
2548 extern void netdev_features_change(struct net_device
*dev
);
2549 /* Load a device via the kmod */
2550 extern void dev_load(struct net
*net
, const char *name
);
2551 extern void dev_mcast_init(void);
2552 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2553 struct rtnl_link_stats64
*storage
);
2555 extern int netdev_max_backlog
;
2556 extern int netdev_tstamp_prequeue
;
2557 extern int weight_p
;
2558 extern int bpf_jit_enable
;
2559 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2560 extern int netdev_set_bond_master(struct net_device
*dev
,
2561 struct net_device
*master
);
2562 extern int skb_checksum_help(struct sk_buff
*skb
);
2563 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
,
2564 netdev_features_t features
);
2566 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2568 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2572 /* rx skb timestamps */
2573 extern void net_enable_timestamp(void);
2574 extern void net_disable_timestamp(void);
2576 #ifdef CONFIG_PROC_FS
2577 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2578 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2579 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2580 extern int dev_seq_open_ops(struct inode
*inode
, struct file
*file
,
2581 const struct seq_operations
*ops
);
2584 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2585 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2587 extern struct kobj_ns_type_operations net_ns_type_operations
;
2589 extern const char *netdev_drivername(const struct net_device
*dev
);
2591 extern void linkwatch_run_queue(void);
2593 static inline netdev_features_t
netdev_get_wanted_features(
2594 struct net_device
*dev
)
2596 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2598 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2599 netdev_features_t one
, netdev_features_t mask
);
2600 int __netdev_update_features(struct net_device
*dev
);
2601 void netdev_update_features(struct net_device
*dev
);
2602 void netdev_change_features(struct net_device
*dev
);
2604 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2605 struct net_device
*dev
);
2607 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2609 static inline int net_gso_ok(netdev_features_t features
, int gso_type
)
2611 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2613 /* check flags correspondence */
2614 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2615 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2616 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2617 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2618 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2619 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2621 return (features
& feature
) == feature
;
2624 static inline int skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2626 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2627 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2630 static inline int netif_needs_gso(struct sk_buff
*skb
,
2631 netdev_features_t features
)
2633 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2634 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
2637 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2640 dev
->gso_max_size
= size
;
2643 static inline int netif_is_bond_slave(struct net_device
*dev
)
2645 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2648 extern struct pernet_operations __net_initdata loopback_net_ops
;
2650 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2652 /* netdev_printk helpers, similar to dev_printk */
2654 static inline const char *netdev_name(const struct net_device
*dev
)
2656 if (dev
->reg_state
!= NETREG_REGISTERED
)
2657 return "(unregistered net_device)";
2661 extern int __netdev_printk(const char *level
, const struct net_device
*dev
,
2662 struct va_format
*vaf
);
2664 extern __printf(3, 4)
2665 int netdev_printk(const char *level
, const struct net_device
*dev
,
2666 const char *format
, ...);
2667 extern __printf(2, 3)
2668 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2669 extern __printf(2, 3)
2670 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2671 extern __printf(2, 3)
2672 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2673 extern __printf(2, 3)
2674 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2675 extern __printf(2, 3)
2676 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2677 extern __printf(2, 3)
2678 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2679 extern __printf(2, 3)
2680 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2682 #define MODULE_ALIAS_NETDEV(device) \
2683 MODULE_ALIAS("netdev-" device)
2686 #define netdev_dbg(__dev, format, args...) \
2687 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2688 #elif defined(CONFIG_DYNAMIC_DEBUG)
2689 #define netdev_dbg(__dev, format, args...) \
2691 dynamic_netdev_dbg(__dev, format, ##args); \
2694 #define netdev_dbg(__dev, format, args...) \
2697 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2702 #if defined(VERBOSE_DEBUG)
2703 #define netdev_vdbg netdev_dbg
2706 #define netdev_vdbg(dev, format, args...) \
2709 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2715 * netdev_WARN() acts like dev_printk(), but with the key difference
2716 * of using a WARN/WARN_ON to get the message out, including the
2717 * file/line information and a backtrace.
2719 #define netdev_WARN(dev, format, args...) \
2720 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2722 /* netif printk helpers, similar to netdev_printk */
2724 #define netif_printk(priv, type, level, dev, fmt, args...) \
2726 if (netif_msg_##type(priv)) \
2727 netdev_printk(level, (dev), fmt, ##args); \
2730 #define netif_level(level, priv, type, dev, fmt, args...) \
2732 if (netif_msg_##type(priv)) \
2733 netdev_##level(dev, fmt, ##args); \
2736 #define netif_emerg(priv, type, dev, fmt, args...) \
2737 netif_level(emerg, priv, type, dev, fmt, ##args)
2738 #define netif_alert(priv, type, dev, fmt, args...) \
2739 netif_level(alert, priv, type, dev, fmt, ##args)
2740 #define netif_crit(priv, type, dev, fmt, args...) \
2741 netif_level(crit, priv, type, dev, fmt, ##args)
2742 #define netif_err(priv, type, dev, fmt, args...) \
2743 netif_level(err, priv, type, dev, fmt, ##args)
2744 #define netif_warn(priv, type, dev, fmt, args...) \
2745 netif_level(warn, priv, type, dev, fmt, ##args)
2746 #define netif_notice(priv, type, dev, fmt, args...) \
2747 netif_level(notice, priv, type, dev, fmt, ##args)
2748 #define netif_info(priv, type, dev, fmt, args...) \
2749 netif_level(info, priv, type, dev, fmt, ##args)
2752 #define netif_dbg(priv, type, dev, format, args...) \
2753 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2754 #elif defined(CONFIG_DYNAMIC_DEBUG)
2755 #define netif_dbg(priv, type, netdev, format, args...) \
2757 if (netif_msg_##type(priv)) \
2758 dynamic_netdev_dbg(netdev, format, ##args); \
2761 #define netif_dbg(priv, type, dev, format, args...) \
2764 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2769 #if defined(VERBOSE_DEBUG)
2770 #define netif_vdbg netif_dbg
2772 #define netif_vdbg(priv, type, dev, format, args...) \
2775 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2780 #endif /* __KERNEL__ */
2782 #endif /* _LINUX_NETDEVICE_H */