2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/pm_qos.h>
29 #include <linux/timer.h>
30 #include <linux/bug.h>
31 #include <linux/delay.h>
32 #include <linux/atomic.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 /* hardware address assignment types */
64 #define NET_ADDR_PERM 0 /* address is permanent (default) */
65 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
66 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
67 #define NET_ADDR_SET 3 /* address is set using
68 * dev_set_mac_address() */
70 /* Backlog congestion levels */
71 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
72 #define NET_RX_DROP 1 /* packet dropped */
75 * Transmit return codes: transmit return codes originate from three different
78 * - qdisc return codes
79 * - driver transmit return codes
82 * Drivers are allowed to return any one of those in their hard_start_xmit()
83 * function. Real network devices commonly used with qdiscs should only return
84 * the driver transmit return codes though - when qdiscs are used, the actual
85 * transmission happens asynchronously, so the value is not propagated to
86 * higher layers. Virtual network devices transmit synchronously, in this case
87 * the driver transmit return codes are consumed by dev_queue_xmit(), all
88 * others are propagated to higher layers.
91 /* qdisc ->enqueue() return codes. */
92 #define NET_XMIT_SUCCESS 0x00
93 #define NET_XMIT_DROP 0x01 /* skb dropped */
94 #define NET_XMIT_CN 0x02 /* congestion notification */
95 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
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*/
111 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
113 typedef enum netdev_tx netdev_tx_t;
116 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
117 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
119 static inline bool dev_xmit_complete(int rc)
122 * Positive cases with an skb consumed by a driver:
123 * - successful transmission (rc == NETDEV_TX_OK)
124 * - error while transmitting (rc < 0)
125 * - error while queueing to a different device (rc & NET_XMIT_MASK)
127 if (likely(rc < NET_XMIT_MASK))
134 * Compute the worst case header length according to the protocols
138 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
139 # if defined(CONFIG_MAC80211_MESH)
140 # define LL_MAX_HEADER 128
142 # define LL_MAX_HEADER 96
144 #elif IS_ENABLED(CONFIG_TR)
145 # define LL_MAX_HEADER 48
147 # define LL_MAX_HEADER 32
150 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
151 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
152 #define MAX_HEADER LL_MAX_HEADER
154 #define MAX_HEADER (LL_MAX_HEADER + 48)
158 * Old network device statistics. Fields are native words
159 * (unsigned long) so they can be read and written atomically.
162 struct net_device_stats {
163 unsigned long rx_packets;
164 unsigned long tx_packets;
165 unsigned long rx_bytes;
166 unsigned long tx_bytes;
167 unsigned long rx_errors;
168 unsigned long tx_errors;
169 unsigned long rx_dropped;
170 unsigned long tx_dropped;
171 unsigned long multicast;
172 unsigned long collisions;
173 unsigned long rx_length_errors;
174 unsigned long rx_over_errors;
175 unsigned long rx_crc_errors;
176 unsigned long rx_frame_errors;
177 unsigned long rx_fifo_errors;
178 unsigned long rx_missed_errors;
179 unsigned long tx_aborted_errors;
180 unsigned long tx_carrier_errors;
181 unsigned long tx_fifo_errors;
182 unsigned long tx_heartbeat_errors;
183 unsigned long tx_window_errors;
184 unsigned long rx_compressed;
185 unsigned long tx_compressed;
189 #include <linux/cache.h>
190 #include <linux/skbuff.h>
193 #include <linux/static_key.h>
194 extern struct static_key rps_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
213 struct rcu_head rcu_head;
216 struct netdev_hw_addr_list {
217 struct list_head list;
221 #define netdev_hw_addr_list_count(l) ((l)->count)
222 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
223 #define netdev_hw_addr_list_for_each(ha, l) \
224 list_for_each_entry(ha, &(l)->list, list)
226 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
227 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
228 #define netdev_for_each_uc_addr(ha, dev) \
229 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
231 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
232 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
233 #define netdev_for_each_mc_addr(ha, dev) \
234 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 (*rebuild)(struct sk_buff *skb);
269 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
270 void (*cache_update)(struct hh_cache *hh,
271 const struct net_device *dev,
272 const unsigned char *haddr);
275 /* These flag bits are private to the generic network queueing
276 * layer, they may not be explicitly referenced by any other
280 enum netdev_state_t {
282 __LINK_STATE_PRESENT,
283 __LINK_STATE_NOCARRIER,
284 __LINK_STATE_LINKWATCH_PENDING,
285 __LINK_STATE_DORMANT,
290 * This structure holds at boot time configured netdevice settings. They
291 * are then used in the device probing.
293 struct netdev_boot_setup {
297 #define NETDEV_BOOT_SETUP_MAX 8
299 extern int __init netdev_boot_setup(char *str);
302 * Structure for NAPI scheduling similar to tasklet but with weighting
305 /* The poll_list must only be managed by the entity which
306 * changes the state of the NAPI_STATE_SCHED bit. This means
307 * whoever atomically sets that bit can add this napi_struct
308 * to the per-cpu poll_list, and whoever clears that bit
309 * can remove from the list right before clearing the bit.
311 struct list_head poll_list;
315 unsigned int gro_count;
316 int (*poll)(struct napi_struct *, int);
317 #ifdef CONFIG_NETPOLL
318 spinlock_t poll_lock;
321 struct net_device *dev;
322 struct sk_buff *gro_list;
324 struct list_head dev_list;
328 NAPI_STATE_SCHED, /* Poll is scheduled */
329 NAPI_STATE_DISABLE, /* Disable pending */
330 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
340 typedef enum gro_result gro_result_t;
343 * enum rx_handler_result - Possible return values for rx_handlers.
344 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
346 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
347 * case skb->dev was changed by rx_handler.
348 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
349 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
351 * rx_handlers are functions called from inside __netif_receive_skb(), to do
352 * special processing of the skb, prior to delivery to protocol handlers.
354 * Currently, a net_device can only have a single rx_handler registered. Trying
355 * to register a second rx_handler will return -EBUSY.
357 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
358 * To unregister a rx_handler on a net_device, use
359 * netdev_rx_handler_unregister().
361 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
364 * If the rx_handler consumed to skb in some way, it should return
365 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
366 * the skb to be delivered in some other ways.
368 * If the rx_handler changed skb->dev, to divert the skb to another
369 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
370 * new device will be called if it exists.
372 * If the rx_handler consider the skb should be ignored, it should return
373 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
374 * are registered on exact device (ptype->dev == skb->dev).
376 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
377 * delivered, it should return RX_HANDLER_PASS.
379 * A device without a registered rx_handler will behave as if rx_handler
380 * returned RX_HANDLER_PASS.
383 enum rx_handler_result {
389 typedef enum rx_handler_result rx_handler_result_t;
390 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
392 extern void __napi_schedule(struct napi_struct *n);
394 static inline bool napi_disable_pending(struct napi_struct *n)
396 return test_bit(NAPI_STATE_DISABLE, &n->state);
400 * napi_schedule_prep - check if napi can be scheduled
403 * Test if NAPI routine is already running, and if not mark
404 * it as running. This is used as a condition variable
405 * insure only one NAPI poll instance runs. We also make
406 * sure there is no pending NAPI disable.
408 static inline bool napi_schedule_prep(struct napi_struct *n)
410 return !napi_disable_pending(n) &&
411 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
415 * napi_schedule - schedule NAPI poll
418 * Schedule NAPI poll routine to be called if it is not already
421 static inline void napi_schedule(struct napi_struct *n)
423 if (napi_schedule_prep(n))
427 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
428 static inline bool napi_reschedule(struct napi_struct *napi)
430 if (napi_schedule_prep(napi)) {
431 __napi_schedule(napi);
438 * napi_complete - NAPI processing complete
441 * Mark NAPI processing as complete.
443 extern void __napi_complete(struct napi_struct *n);
444 extern void napi_complete(struct napi_struct *n);
447 * napi_disable - prevent NAPI from scheduling
450 * Stop NAPI from being scheduled on this context.
451 * Waits till any outstanding processing completes.
453 static inline void napi_disable(struct napi_struct *n)
455 set_bit(NAPI_STATE_DISABLE, &n->state);
456 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
458 clear_bit(NAPI_STATE_DISABLE, &n->state);
462 * napi_enable - enable NAPI scheduling
465 * Resume NAPI from being scheduled on this context.
466 * Must be paired with napi_disable.
468 static inline void napi_enable(struct napi_struct *n)
470 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
471 smp_mb__before_clear_bit();
472 clear_bit(NAPI_STATE_SCHED, &n->state);
477 * napi_synchronize - wait until NAPI is not running
480 * Wait until NAPI is done being scheduled on this context.
481 * Waits till any outstanding processing completes but
482 * does not disable future activations.
484 static inline void napi_synchronize(const struct napi_struct *n)
486 while (test_bit(NAPI_STATE_SCHED, &n->state))
490 # define napi_synchronize(n) barrier()
493 enum netdev_queue_state_t {
494 __QUEUE_STATE_DRV_XOFF,
495 __QUEUE_STATE_STACK_XOFF,
496 __QUEUE_STATE_FROZEN,
497 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
498 (1 << __QUEUE_STATE_STACK_XOFF))
499 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
500 (1 << __QUEUE_STATE_FROZEN))
503 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
504 * netif_tx_* functions below are used to manipulate this flag. The
505 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
506 * queue independently. The netif_xmit_*stopped functions below are called
507 * to check if the queue has been stopped by the driver or stack (either
508 * of the XOFF bits are set in the state). Drivers should not need to call
509 * netif_xmit*stopped functions, they should only be using netif_tx_*.
512 struct netdev_queue {
516 struct net_device *dev;
518 struct Qdisc *qdisc_sleeping;
522 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
528 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
531 * please use this field instead of dev->trans_start
533 unsigned long trans_start;
536 * Number of TX timeouts for this queue
537 * (/sys/class/net/DEV/Q/trans_timeout)
539 unsigned long trans_timeout;
546 } ____cacheline_aligned_in_smp;
548 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
550 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
557 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
559 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
566 * This structure holds an RPS map which can be of variable length. The
567 * map is an array of CPUs.
574 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
577 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
578 * tail pointer for that CPU's input queue at the time of last enqueue, and
579 * a hardware filter index.
581 struct rps_dev_flow {
584 unsigned int last_qtail;
586 #define RPS_NO_FILTER 0xffff
589 * The rps_dev_flow_table structure contains a table of flow mappings.
591 struct rps_dev_flow_table {
594 struct work_struct free_work;
595 struct rps_dev_flow flows[0];
597 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
598 ((_num) * sizeof(struct rps_dev_flow)))
601 * The rps_sock_flow_table contains mappings of flows to the last CPU
602 * on which they were processed by the application (set in recvmsg).
604 struct rps_sock_flow_table {
608 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
609 ((_num) * sizeof(u16)))
611 #define RPS_NO_CPU 0xffff
613 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
617 unsigned int cpu, index = hash & table->mask;
619 /* We only give a hint, preemption can change cpu under us */
620 cpu = raw_smp_processor_id();
622 if (table->ents[index] != cpu)
623 table->ents[index] = cpu;
627 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
631 table->ents[hash & table->mask] = RPS_NO_CPU;
634 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
636 #ifdef CONFIG_RFS_ACCEL
637 extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
638 u32 flow_id, u16 filter_id);
641 /* This structure contains an instance of an RX queue. */
642 struct netdev_rx_queue {
643 struct rps_map __rcu *rps_map;
644 struct rps_dev_flow_table __rcu *rps_flow_table;
646 struct net_device *dev;
647 } ____cacheline_aligned_in_smp;
648 #endif /* CONFIG_RPS */
652 * This structure holds an XPS map which can be of variable length. The
653 * map is an array of queues.
657 unsigned int alloc_len;
661 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
662 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
666 * This structure holds all XPS maps for device. Maps are indexed by CPU.
668 struct xps_dev_maps {
670 struct xps_map __rcu *cpu_map[0];
672 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
673 (nr_cpu_ids * sizeof(struct xps_map *)))
674 #endif /* CONFIG_XPS */
676 #define TC_MAX_QUEUE 16
677 #define TC_BITMASK 15
678 /* HW offloaded queuing disciplines txq count and offset maps */
679 struct netdev_tc_txq {
684 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
686 * This structure is to hold information about the device
687 * configured to run FCoE protocol stack.
689 struct netdev_fcoe_hbainfo {
690 char manufacturer[64];
691 char serial_number[64];
692 char hardware_version[64];
693 char driver_version[64];
694 char optionrom_version[64];
695 char firmware_version[64];
697 char model_description[256];
702 * This structure defines the management hooks for network devices.
703 * The following hooks can be defined; unless noted otherwise, they are
704 * optional and can be filled with a null pointer.
706 * int (*ndo_init)(struct net_device *dev);
707 * This function is called once when network device is registered.
708 * The network device can use this to any late stage initializaton
709 * or semantic validattion. It can fail with an error code which will
710 * be propogated back to register_netdev
712 * void (*ndo_uninit)(struct net_device *dev);
713 * This function is called when device is unregistered or when registration
714 * fails. It is not called if init fails.
716 * int (*ndo_open)(struct net_device *dev);
717 * This function is called when network device transistions to the up
720 * int (*ndo_stop)(struct net_device *dev);
721 * This function is called when network device transistions to the down
724 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
725 * struct net_device *dev);
726 * Called when a packet needs to be transmitted.
727 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
728 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
729 * Required can not be NULL.
731 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
732 * Called to decide which queue to when device supports multiple
735 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
736 * This function is called to allow device receiver to make
737 * changes to configuration when multicast or promiscious is enabled.
739 * void (*ndo_set_rx_mode)(struct net_device *dev);
740 * This function is called device changes address list filtering.
741 * If driver handles unicast address filtering, it should set
742 * IFF_UNICAST_FLT to its priv_flags.
744 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
745 * This function is called when the Media Access Control address
746 * needs to be changed. If this interface is not defined, the
747 * mac address can not be changed.
749 * int (*ndo_validate_addr)(struct net_device *dev);
750 * Test if Media Access Control address is valid for the device.
752 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
753 * Called when a user request an ioctl which can't be handled by
754 * the generic interface code. If not defined ioctl's return
755 * not supported error code.
757 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
758 * Used to set network devices bus interface parameters. This interface
759 * is retained for legacy reason, new devices should use the bus
760 * interface (PCI) for low level management.
762 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
763 * Called when a user wants to change the Maximum Transfer Unit
764 * of a device. If not defined, any request to change MTU will
765 * will return an error.
767 * void (*ndo_tx_timeout)(struct net_device *dev);
768 * Callback uses when the transmitter has not made any progress
769 * for dev->watchdog ticks.
771 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
772 * struct rtnl_link_stats64 *storage);
773 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
774 * Called when a user wants to get the network device usage
775 * statistics. Drivers must do one of the following:
776 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
777 * rtnl_link_stats64 structure passed by the caller.
778 * 2. Define @ndo_get_stats to update a net_device_stats structure
779 * (which should normally be dev->stats) and return a pointer to
780 * it. The structure may be changed asynchronously only if each
781 * field is written atomically.
782 * 3. Update dev->stats asynchronously and atomically, and define
785 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
786 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
787 * this function is called when a VLAN id is registered.
789 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
790 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
791 * this function is called when a VLAN id is unregistered.
793 * void (*ndo_poll_controller)(struct net_device *dev);
795 * SR-IOV management functions.
796 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
797 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
798 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
799 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
800 * int (*ndo_get_vf_config)(struct net_device *dev,
801 * int vf, struct ifla_vf_info *ivf);
802 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
803 * struct nlattr *port[]);
804 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
805 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
806 * Called to setup 'tc' number of traffic classes in the net device. This
807 * is always called from the stack with the rtnl lock held and netif tx
808 * queues stopped. This allows the netdevice to perform queue management
811 * Fiber Channel over Ethernet (FCoE) offload functions.
812 * int (*ndo_fcoe_enable)(struct net_device *dev);
813 * Called when the FCoE protocol stack wants to start using LLD for FCoE
814 * so the underlying device can perform whatever needed configuration or
815 * initialization to support acceleration of FCoE traffic.
817 * int (*ndo_fcoe_disable)(struct net_device *dev);
818 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
819 * so the underlying device can perform whatever needed clean-ups to
820 * stop supporting acceleration of FCoE traffic.
822 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
823 * struct scatterlist *sgl, unsigned int sgc);
824 * Called when the FCoE Initiator wants to initialize an I/O that
825 * is a possible candidate for Direct Data Placement (DDP). The LLD can
826 * perform necessary setup and returns 1 to indicate the device is set up
827 * successfully to perform DDP on this I/O, otherwise this returns 0.
829 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
830 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
831 * indicated by the FC exchange id 'xid', so the underlying device can
832 * clean up and reuse resources for later DDP requests.
834 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
835 * struct scatterlist *sgl, unsigned int sgc);
836 * Called when the FCoE Target wants to initialize an I/O that
837 * is a possible candidate for Direct Data Placement (DDP). The LLD can
838 * perform necessary setup and returns 1 to indicate the device is set up
839 * successfully to perform DDP on this I/O, otherwise this returns 0.
841 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
842 * struct netdev_fcoe_hbainfo *hbainfo);
843 * Called when the FCoE Protocol stack wants information on the underlying
844 * device. This information is utilized by the FCoE protocol stack to
845 * register attributes with Fiber Channel management service as per the
846 * FC-GS Fabric Device Management Information(FDMI) specification.
848 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
849 * Called when the underlying device wants to override default World Wide
850 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
851 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
852 * protocol stack to use.
855 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
856 * u16 rxq_index, u32 flow_id);
857 * Set hardware filter for RFS. rxq_index is the target queue index;
858 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
859 * Return the filter ID on success, or a negative error code.
861 * Slave management functions (for bridge, bonding, etc). User should
862 * call netdev_set_master() to set dev->master properly.
863 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
864 * Called to make another netdev an underling.
866 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
867 * Called to release previously enslaved netdev.
869 * Feature/offload setting functions.
870 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
871 * netdev_features_t features);
872 * Adjusts the requested feature flags according to device-specific
873 * constraints, and returns the resulting flags. Must not modify
876 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
877 * Called to update device configuration to new features. Passed
878 * feature set might be less than what was returned by ndo_fix_features()).
879 * Must return >0 or -errno if it changed dev->features itself.
881 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
882 * struct net_device *dev,
883 * const unsigned char *addr, u16 flags)
884 * Adds an FDB entry to dev for addr.
885 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev,
886 * const unsigned char *addr)
887 * Deletes the FDB entry from dev coresponding to addr.
888 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
889 * struct net_device *dev, int idx)
890 * Used to add FDB entries to dump requests. Implementers should add
891 * entries to skb and update idx with the number of entries.
893 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
894 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
895 * struct net_device *dev)
897 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
898 * Called to change device carrier. Soft-devices (like dummy, team, etc)
899 * which do not represent real hardware may define this to allow their
900 * userspace components to manage their virtual carrier state. Devices
901 * that determine carrier state from physical hardware properties (eg
902 * network cables) or protocol-dependent mechanisms (eg
903 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
905 struct net_device_ops {
906 int (*ndo_init)(struct net_device *dev);
907 void (*ndo_uninit)(struct net_device *dev);
908 int (*ndo_open)(struct net_device *dev);
909 int (*ndo_stop)(struct net_device *dev);
910 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
911 struct net_device *dev);
912 u16 (*ndo_select_queue)(struct net_device *dev,
913 struct sk_buff *skb);
914 void (*ndo_change_rx_flags)(struct net_device *dev,
916 void (*ndo_set_rx_mode)(struct net_device *dev);
917 int (*ndo_set_mac_address)(struct net_device *dev,
919 int (*ndo_validate_addr)(struct net_device *dev);
920 int (*ndo_do_ioctl)(struct net_device *dev,
921 struct ifreq *ifr, int cmd);
922 int (*ndo_set_config)(struct net_device *dev,
924 int (*ndo_change_mtu)(struct net_device *dev,
926 int (*ndo_neigh_setup)(struct net_device *dev,
927 struct neigh_parms *);
928 void (*ndo_tx_timeout) (struct net_device *dev);
930 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
931 struct rtnl_link_stats64 *storage);
932 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
934 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
936 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
938 #ifdef CONFIG_NET_POLL_CONTROLLER
939 void (*ndo_poll_controller)(struct net_device *dev);
940 int (*ndo_netpoll_setup)(struct net_device *dev,
941 struct netpoll_info *info,
943 void (*ndo_netpoll_cleanup)(struct net_device *dev);
945 int (*ndo_set_vf_mac)(struct net_device *dev,
947 int (*ndo_set_vf_vlan)(struct net_device *dev,
948 int queue, u16 vlan, u8 qos);
949 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
951 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
952 int vf, bool setting);
953 int (*ndo_get_vf_config)(struct net_device *dev,
955 struct ifla_vf_info *ivf);
956 int (*ndo_set_vf_port)(struct net_device *dev,
958 struct nlattr *port[]);
959 int (*ndo_get_vf_port)(struct net_device *dev,
960 int vf, struct sk_buff *skb);
961 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
962 #if IS_ENABLED(CONFIG_FCOE)
963 int (*ndo_fcoe_enable)(struct net_device *dev);
964 int (*ndo_fcoe_disable)(struct net_device *dev);
965 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
967 struct scatterlist *sgl,
969 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
971 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
973 struct scatterlist *sgl,
975 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
976 struct netdev_fcoe_hbainfo *hbainfo);
979 #if IS_ENABLED(CONFIG_LIBFCOE)
980 #define NETDEV_FCOE_WWNN 0
981 #define NETDEV_FCOE_WWPN 1
982 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
986 #ifdef CONFIG_RFS_ACCEL
987 int (*ndo_rx_flow_steer)(struct net_device *dev,
988 const struct sk_buff *skb,
992 int (*ndo_add_slave)(struct net_device *dev,
993 struct net_device *slave_dev);
994 int (*ndo_del_slave)(struct net_device *dev,
995 struct net_device *slave_dev);
996 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
997 netdev_features_t features);
998 int (*ndo_set_features)(struct net_device *dev,
999 netdev_features_t features);
1000 int (*ndo_neigh_construct)(struct neighbour *n);
1001 void (*ndo_neigh_destroy)(struct neighbour *n);
1003 int (*ndo_fdb_add)(struct ndmsg *ndm,
1004 struct nlattr *tb[],
1005 struct net_device *dev,
1006 const unsigned char *addr,
1008 int (*ndo_fdb_del)(struct ndmsg *ndm,
1009 struct net_device *dev,
1010 const unsigned char *addr);
1011 int (*ndo_fdb_dump)(struct sk_buff *skb,
1012 struct netlink_callback *cb,
1013 struct net_device *dev,
1016 int (*ndo_bridge_setlink)(struct net_device *dev,
1017 struct nlmsghdr *nlh);
1018 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1020 struct net_device *dev);
1021 int (*ndo_change_carrier)(struct net_device *dev,
1026 * The DEVICE structure.
1027 * Actually, this whole structure is a big mistake. It mixes I/O
1028 * data with strictly "high-level" data, and it has to know about
1029 * almost every data structure used in the INET module.
1031 * FIXME: cleanup struct net_device such that network protocol info
1038 * This is the first field of the "visible" part of this structure
1039 * (i.e. as seen by users in the "Space.c" file). It is the name
1042 char name[IFNAMSIZ];
1044 /* device name hash chain, please keep it close to name[] */
1045 struct hlist_node name_hlist;
1051 * I/O specific fields
1052 * FIXME: Merge these and struct ifmap into one
1054 unsigned long mem_end; /* shared mem end */
1055 unsigned long mem_start; /* shared mem start */
1056 unsigned long base_addr; /* device I/O address */
1057 unsigned int irq; /* device IRQ number */
1060 * Some hardware also needs these fields, but they are not
1061 * part of the usual set specified in Space.c.
1064 unsigned long state;
1066 struct list_head dev_list;
1067 struct list_head napi_list;
1068 struct list_head unreg_list;
1070 /* currently active device features */
1071 netdev_features_t features;
1072 /* user-changeable features */
1073 netdev_features_t hw_features;
1074 /* user-requested features */
1075 netdev_features_t wanted_features;
1076 /* mask of features inheritable by VLAN devices */
1077 netdev_features_t vlan_features;
1078 /* mask of features inherited by encapsulating devices
1079 * This field indicates what encapsulation offloads
1080 * the hardware is capable of doing, and drivers will
1081 * need to set them appropriately.
1083 netdev_features_t hw_enc_features;
1085 /* Interface index. Unique device identifier */
1089 struct net_device_stats stats;
1090 atomic_long_t rx_dropped; /* dropped packets by core network
1091 * Do not use this in drivers.
1094 #ifdef CONFIG_WIRELESS_EXT
1095 /* List of functions to handle Wireless Extensions (instead of ioctl).
1096 * See <net/iw_handler.h> for details. Jean II */
1097 const struct iw_handler_def * wireless_handlers;
1098 /* Instance data managed by the core of Wireless Extensions. */
1099 struct iw_public_data * wireless_data;
1101 /* Management operations */
1102 const struct net_device_ops *netdev_ops;
1103 const struct ethtool_ops *ethtool_ops;
1105 /* Hardware header description */
1106 const struct header_ops *header_ops;
1108 unsigned int flags; /* interface flags (a la BSD) */
1109 unsigned int priv_flags; /* Like 'flags' but invisible to userspace.
1110 * See if.h for definitions. */
1111 unsigned short gflags;
1112 unsigned short padded; /* How much padding added by alloc_netdev() */
1114 unsigned char operstate; /* RFC2863 operstate */
1115 unsigned char link_mode; /* mapping policy to operstate */
1117 unsigned char if_port; /* Selectable AUI, TP,..*/
1118 unsigned char dma; /* DMA channel */
1120 unsigned int mtu; /* interface MTU value */
1121 unsigned short type; /* interface hardware type */
1122 unsigned short hard_header_len; /* hardware hdr length */
1124 /* extra head- and tailroom the hardware may need, but not in all cases
1125 * can this be guaranteed, especially tailroom. Some cases also use
1126 * LL_MAX_HEADER instead to allocate the skb.
1128 unsigned short needed_headroom;
1129 unsigned short needed_tailroom;
1131 /* Interface address info. */
1132 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1133 unsigned char addr_assign_type; /* hw address assignment type */
1134 unsigned char addr_len; /* hardware address length */
1135 unsigned char neigh_priv_len;
1136 unsigned short dev_id; /* for shared network cards */
1138 spinlock_t addr_list_lock;
1139 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1140 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1142 unsigned int promiscuity;
1143 unsigned int allmulti;
1146 /* Protocol specific pointers */
1148 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1149 struct vlan_info __rcu *vlan_info; /* VLAN info */
1151 #if IS_ENABLED(CONFIG_NET_DSA)
1152 struct dsa_switch_tree *dsa_ptr; /* dsa specific data */
1154 void *atalk_ptr; /* AppleTalk link */
1155 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1156 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1157 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1158 void *ax25_ptr; /* AX.25 specific data */
1159 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1160 assign before registering */
1163 * Cache lines mostly used on receive path (including eth_type_trans())
1165 unsigned long last_rx; /* Time of last Rx
1166 * This should not be set in
1167 * drivers, unless really needed,
1168 * because network stack (bonding)
1169 * use it if/when necessary, to
1170 * avoid dirtying this cache line.
1173 struct net_device *master; /* Pointer to master device of a group,
1174 * which this device is member of.
1177 struct list_head upper_dev_list; /* List of upper devices */
1179 /* Interface address info used in eth_type_trans() */
1180 unsigned char *dev_addr; /* hw address, (before bcast
1181 because most packets are
1184 struct netdev_hw_addr_list dev_addrs; /* list of device
1187 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1190 struct kset *queues_kset;
1194 struct netdev_rx_queue *_rx;
1196 /* Number of RX queues allocated at register_netdev() time */
1197 unsigned int num_rx_queues;
1199 /* Number of RX queues currently active in device */
1200 unsigned int real_num_rx_queues;
1202 #ifdef CONFIG_RFS_ACCEL
1203 /* CPU reverse-mapping for RX completion interrupts, indexed
1204 * by RX queue number. Assigned by driver. This must only be
1205 * set if the ndo_rx_flow_steer operation is defined. */
1206 struct cpu_rmap *rx_cpu_rmap;
1210 rx_handler_func_t __rcu *rx_handler;
1211 void __rcu *rx_handler_data;
1213 struct netdev_queue __rcu *ingress_queue;
1216 * Cache lines mostly used on transmit path
1218 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1220 /* Number of TX queues allocated at alloc_netdev_mq() time */
1221 unsigned int num_tx_queues;
1223 /* Number of TX queues currently active in device */
1224 unsigned int real_num_tx_queues;
1226 /* root qdisc from userspace point of view */
1227 struct Qdisc *qdisc;
1229 unsigned long tx_queue_len; /* Max frames per queue allowed */
1230 spinlock_t tx_global_lock;
1233 struct xps_dev_maps __rcu *xps_maps;
1236 /* These may be needed for future network-power-down code. */
1239 * trans_start here is expensive for high speed devices on SMP,
1240 * please use netdev_queue->trans_start instead.
1242 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1244 int watchdog_timeo; /* used by dev_watchdog() */
1245 struct timer_list watchdog_timer;
1247 /* Number of references to this device */
1248 int __percpu *pcpu_refcnt;
1250 /* delayed register/unregister */
1251 struct list_head todo_list;
1252 /* device index hash chain */
1253 struct hlist_node index_hlist;
1255 struct list_head link_watch_list;
1257 /* register/unregister state machine */
1258 enum { NETREG_UNINITIALIZED=0,
1259 NETREG_REGISTERED, /* completed register_netdevice */
1260 NETREG_UNREGISTERING, /* called unregister_netdevice */
1261 NETREG_UNREGISTERED, /* completed unregister todo */
1262 NETREG_RELEASED, /* called free_netdev */
1263 NETREG_DUMMY, /* dummy device for NAPI poll */
1266 bool dismantle; /* device is going do be freed */
1269 RTNL_LINK_INITIALIZED,
1270 RTNL_LINK_INITIALIZING,
1271 } rtnl_link_state:16;
1273 /* Called from unregister, can be used to call free_netdev */
1274 void (*destructor)(struct net_device *dev);
1276 #ifdef CONFIG_NETPOLL
1277 struct netpoll_info *npinfo;
1280 #ifdef CONFIG_NET_NS
1281 /* Network namespace this network device is inside */
1285 /* mid-layer private */
1288 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1289 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1290 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1291 struct pcpu_vstats __percpu *vstats; /* veth stats */
1294 struct garp_port __rcu *garp_port;
1296 /* class/net/name entry */
1298 /* space for optional device, statistics, and wireless sysfs groups */
1299 const struct attribute_group *sysfs_groups[4];
1301 /* rtnetlink link ops */
1302 const struct rtnl_link_ops *rtnl_link_ops;
1304 /* for setting kernel sock attribute on TCP connection setup */
1305 #define GSO_MAX_SIZE 65536
1306 unsigned int gso_max_size;
1307 #define GSO_MAX_SEGS 65535
1311 /* Data Center Bridging netlink ops */
1312 const struct dcbnl_rtnl_ops *dcbnl_ops;
1315 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1316 u8 prio_tc_map[TC_BITMASK + 1];
1318 #if IS_ENABLED(CONFIG_FCOE)
1319 /* max exchange id for FCoE LRO by ddp */
1320 unsigned int fcoe_ddp_xid;
1322 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1323 struct netprio_map __rcu *priomap;
1325 /* phy device may attach itself for hardware timestamping */
1326 struct phy_device *phydev;
1328 struct lock_class_key *qdisc_tx_busylock;
1330 /* group the device belongs to */
1333 struct pm_qos_request pm_qos_req;
1335 #define to_net_dev(d) container_of(d, struct net_device, dev)
1337 #define NETDEV_ALIGN 32
1340 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1342 return dev->prio_tc_map[prio & TC_BITMASK];
1346 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1348 if (tc >= dev->num_tc)
1351 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1356 void netdev_reset_tc(struct net_device *dev)
1359 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1360 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1364 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1366 if (tc >= dev->num_tc)
1369 dev->tc_to_txq[tc].count = count;
1370 dev->tc_to_txq[tc].offset = offset;
1375 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1377 if (num_tc > TC_MAX_QUEUE)
1380 dev->num_tc = num_tc;
1385 int netdev_get_num_tc(struct net_device *dev)
1391 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1394 return &dev->_tx[index];
1397 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1398 void (*f)(struct net_device *,
1399 struct netdev_queue *,
1405 for (i = 0; i < dev->num_tx_queues; i++)
1406 f(dev, &dev->_tx[i], arg);
1409 extern struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1410 struct sk_buff *skb);
1413 * Net namespace inlines
1416 struct net *dev_net(const struct net_device *dev)
1418 return read_pnet(&dev->nd_net);
1422 void dev_net_set(struct net_device *dev, struct net *net)
1424 #ifdef CONFIG_NET_NS
1425 release_net(dev->nd_net);
1426 dev->nd_net = hold_net(net);
1430 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1432 #ifdef CONFIG_NET_DSA_TAG_DSA
1433 if (dev->dsa_ptr != NULL)
1434 return dsa_uses_dsa_tags(dev->dsa_ptr);
1440 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1442 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1443 if (dev->dsa_ptr != NULL)
1444 return dsa_uses_trailer_tags(dev->dsa_ptr);
1451 * netdev_priv - access network device private data
1452 * @dev: network device
1454 * Get network device private data
1456 static inline void *netdev_priv(const struct net_device *dev)
1458 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1461 /* Set the sysfs physical device reference for the network logical device
1462 * if set prior to registration will cause a symlink during initialization.
1464 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1466 /* Set the sysfs device type for the network logical device to allow
1467 * fin grained indentification of different network device types. For
1468 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1470 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1473 * netif_napi_add - initialize a napi context
1474 * @dev: network device
1475 * @napi: napi context
1476 * @poll: polling function
1477 * @weight: default weight
1479 * netif_napi_add() must be used to initialize a napi context prior to calling
1480 * *any* of the other napi related functions.
1482 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1483 int (*poll)(struct napi_struct *, int), int weight);
1486 * netif_napi_del - remove a napi context
1487 * @napi: napi context
1489 * netif_napi_del() removes a napi context from the network device napi list
1491 void netif_napi_del(struct napi_struct *napi);
1493 struct napi_gro_cb {
1494 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1497 /* Length of frag0. */
1498 unsigned int frag0_len;
1500 /* This indicates where we are processing relative to skb->data. */
1503 /* This is non-zero if the packet cannot be merged with the new skb. */
1506 /* Number of segments aggregated. */
1509 /* This is non-zero if the packet may be of the same flow. */
1514 #define NAPI_GRO_FREE 1
1515 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1517 /* jiffies when first packet was created/queued */
1520 /* Used in ipv6_gro_receive() */
1523 /* used in skb_gro_receive() slow path */
1524 struct sk_buff *last;
1527 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1529 struct packet_type {
1530 __be16 type; /* This is really htons(ether_type). */
1531 struct net_device *dev; /* NULL is wildcarded here */
1532 int (*func) (struct sk_buff *,
1533 struct net_device *,
1534 struct packet_type *,
1535 struct net_device *);
1536 bool (*id_match)(struct packet_type *ptype,
1538 void *af_packet_priv;
1539 struct list_head list;
1542 struct offload_callbacks {
1543 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1544 netdev_features_t features);
1545 int (*gso_send_check)(struct sk_buff *skb);
1546 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1547 struct sk_buff *skb);
1548 int (*gro_complete)(struct sk_buff *skb);
1551 struct packet_offload {
1552 __be16 type; /* This is really htons(ether_type). */
1553 struct offload_callbacks callbacks;
1554 struct list_head list;
1557 #include <linux/notifier.h>
1559 /* netdevice notifier chain. Please remember to update the rtnetlink
1560 * notification exclusion list in rtnetlink_event() when adding new
1563 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1564 #define NETDEV_DOWN 0x0002
1565 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1566 detected a hardware crash and restarted
1567 - we can use this eg to kick tcp sessions
1569 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1570 #define NETDEV_REGISTER 0x0005
1571 #define NETDEV_UNREGISTER 0x0006
1572 #define NETDEV_CHANGEMTU 0x0007
1573 #define NETDEV_CHANGEADDR 0x0008
1574 #define NETDEV_GOING_DOWN 0x0009
1575 #define NETDEV_CHANGENAME 0x000A
1576 #define NETDEV_FEAT_CHANGE 0x000B
1577 #define NETDEV_BONDING_FAILOVER 0x000C
1578 #define NETDEV_PRE_UP 0x000D
1579 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1580 #define NETDEV_POST_TYPE_CHANGE 0x000F
1581 #define NETDEV_POST_INIT 0x0010
1582 #define NETDEV_UNREGISTER_FINAL 0x0011
1583 #define NETDEV_RELEASE 0x0012
1584 #define NETDEV_NOTIFY_PEERS 0x0013
1585 #define NETDEV_JOIN 0x0014
1587 extern int register_netdevice_notifier(struct notifier_block *nb);
1588 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1589 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1592 extern rwlock_t dev_base_lock; /* Device list lock */
1594 extern seqcount_t devnet_rename_seq; /* Device rename seq */
1597 #define for_each_netdev(net, d) \
1598 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1599 #define for_each_netdev_reverse(net, d) \
1600 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1601 #define for_each_netdev_rcu(net, d) \
1602 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1603 #define for_each_netdev_safe(net, d, n) \
1604 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1605 #define for_each_netdev_continue(net, d) \
1606 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1607 #define for_each_netdev_continue_rcu(net, d) \
1608 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1609 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1611 static inline struct net_device *next_net_device(struct net_device *dev)
1613 struct list_head *lh;
1617 lh = dev->dev_list.next;
1618 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1621 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1623 struct list_head *lh;
1627 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1628 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1631 static inline struct net_device *first_net_device(struct net *net)
1633 return list_empty(&net->dev_base_head) ? NULL :
1634 net_device_entry(net->dev_base_head.next);
1637 static inline struct net_device *first_net_device_rcu(struct net *net)
1639 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1641 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1644 extern int netdev_boot_setup_check(struct net_device *dev);
1645 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1646 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1647 const char *hwaddr);
1648 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1649 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1650 extern void dev_add_pack(struct packet_type *pt);
1651 extern void dev_remove_pack(struct packet_type *pt);
1652 extern void __dev_remove_pack(struct packet_type *pt);
1653 extern void dev_add_offload(struct packet_offload *po);
1654 extern void dev_remove_offload(struct packet_offload *po);
1655 extern void __dev_remove_offload(struct packet_offload *po);
1657 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1658 unsigned short mask);
1659 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1660 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1661 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1662 extern int dev_alloc_name(struct net_device *dev, const char *name);
1663 extern int dev_open(struct net_device *dev);
1664 extern int dev_close(struct net_device *dev);
1665 extern void dev_disable_lro(struct net_device *dev);
1666 extern int dev_loopback_xmit(struct sk_buff *newskb);
1667 extern int dev_queue_xmit(struct sk_buff *skb);
1668 extern int register_netdevice(struct net_device *dev);
1669 extern void unregister_netdevice_queue(struct net_device *dev,
1670 struct list_head *head);
1671 extern void unregister_netdevice_many(struct list_head *head);
1672 static inline void unregister_netdevice(struct net_device *dev)
1674 unregister_netdevice_queue(dev, NULL);
1677 extern int netdev_refcnt_read(const struct net_device *dev);
1678 extern void free_netdev(struct net_device *dev);
1679 extern void synchronize_net(void);
1680 extern int init_dummy_netdev(struct net_device *dev);
1681 extern void netdev_resync_ops(struct net_device *dev);
1683 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1684 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1685 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1686 extern int dev_restart(struct net_device *dev);
1687 #ifdef CONFIG_NETPOLL_TRAP
1688 extern int netpoll_trap(void);
1690 extern int skb_gro_receive(struct sk_buff **head,
1691 struct sk_buff *skb);
1693 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1695 return NAPI_GRO_CB(skb)->data_offset;
1698 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1700 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1703 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1705 NAPI_GRO_CB(skb)->data_offset += len;
1708 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1709 unsigned int offset)
1711 return NAPI_GRO_CB(skb)->frag0 + offset;
1714 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1716 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1719 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1720 unsigned int offset)
1722 if (!pskb_may_pull(skb, hlen))
1725 NAPI_GRO_CB(skb)->frag0 = NULL;
1726 NAPI_GRO_CB(skb)->frag0_len = 0;
1727 return skb->data + offset;
1730 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1732 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1735 static inline void *skb_gro_network_header(struct sk_buff *skb)
1737 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1738 skb_network_offset(skb);
1741 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1742 unsigned short type,
1743 const void *daddr, const void *saddr,
1746 if (!dev->header_ops || !dev->header_ops->create)
1749 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1752 static inline int dev_parse_header(const struct sk_buff *skb,
1753 unsigned char *haddr)
1755 const struct net_device *dev = skb->dev;
1757 if (!dev->header_ops || !dev->header_ops->parse)
1759 return dev->header_ops->parse(skb, haddr);
1762 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1763 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1764 static inline int unregister_gifconf(unsigned int family)
1766 return register_gifconf(family, NULL);
1770 * Incoming packets are placed on per-cpu queues
1772 struct softnet_data {
1773 struct Qdisc *output_queue;
1774 struct Qdisc **output_queue_tailp;
1775 struct list_head poll_list;
1776 struct sk_buff *completion_queue;
1777 struct sk_buff_head process_queue;
1780 unsigned int processed;
1781 unsigned int time_squeeze;
1782 unsigned int cpu_collision;
1783 unsigned int received_rps;
1786 struct softnet_data *rps_ipi_list;
1788 /* Elements below can be accessed between CPUs for RPS */
1789 struct call_single_data csd ____cacheline_aligned_in_smp;
1790 struct softnet_data *rps_ipi_next;
1792 unsigned int input_queue_head;
1793 unsigned int input_queue_tail;
1795 unsigned int dropped;
1796 struct sk_buff_head input_pkt_queue;
1797 struct napi_struct backlog;
1800 static inline void input_queue_head_incr(struct softnet_data *sd)
1803 sd->input_queue_head++;
1807 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1808 unsigned int *qtail)
1811 *qtail = ++sd->input_queue_tail;
1815 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1817 extern void __netif_schedule(struct Qdisc *q);
1819 static inline void netif_schedule_queue(struct netdev_queue *txq)
1821 if (!(txq->state & QUEUE_STATE_ANY_XOFF))
1822 __netif_schedule(txq->qdisc);
1825 static inline void netif_tx_schedule_all(struct net_device *dev)
1829 for (i = 0; i < dev->num_tx_queues; i++)
1830 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1833 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1835 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1839 * netif_start_queue - allow transmit
1840 * @dev: network device
1842 * Allow upper layers to call the device hard_start_xmit routine.
1844 static inline void netif_start_queue(struct net_device *dev)
1846 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1849 static inline void netif_tx_start_all_queues(struct net_device *dev)
1853 for (i = 0; i < dev->num_tx_queues; i++) {
1854 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1855 netif_tx_start_queue(txq);
1859 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1861 #ifdef CONFIG_NETPOLL_TRAP
1862 if (netpoll_trap()) {
1863 netif_tx_start_queue(dev_queue);
1867 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
1868 __netif_schedule(dev_queue->qdisc);
1872 * netif_wake_queue - restart transmit
1873 * @dev: network device
1875 * Allow upper layers to call the device hard_start_xmit routine.
1876 * Used for flow control when transmit resources are available.
1878 static inline void netif_wake_queue(struct net_device *dev)
1880 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1883 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1887 for (i = 0; i < dev->num_tx_queues; i++) {
1888 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1889 netif_tx_wake_queue(txq);
1893 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1895 if (WARN_ON(!dev_queue)) {
1896 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1899 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1903 * netif_stop_queue - stop transmitted packets
1904 * @dev: network device
1906 * Stop upper layers calling the device hard_start_xmit routine.
1907 * Used for flow control when transmit resources are unavailable.
1909 static inline void netif_stop_queue(struct net_device *dev)
1911 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1914 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1918 for (i = 0; i < dev->num_tx_queues; i++) {
1919 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1920 netif_tx_stop_queue(txq);
1924 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1926 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1930 * netif_queue_stopped - test if transmit queue is flowblocked
1931 * @dev: network device
1933 * Test if transmit queue on device is currently unable to send.
1935 static inline bool netif_queue_stopped(const struct net_device *dev)
1937 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1940 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
1942 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
1945 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
1947 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
1950 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
1954 dql_queued(&dev_queue->dql, bytes);
1956 if (likely(dql_avail(&dev_queue->dql) >= 0))
1959 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
1962 * The XOFF flag must be set before checking the dql_avail below,
1963 * because in netdev_tx_completed_queue we update the dql_completed
1964 * before checking the XOFF flag.
1968 /* check again in case another CPU has just made room avail */
1969 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
1970 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
1974 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
1976 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
1979 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
1980 unsigned int pkts, unsigned int bytes)
1983 if (unlikely(!bytes))
1986 dql_completed(&dev_queue->dql, bytes);
1989 * Without the memory barrier there is a small possiblity that
1990 * netdev_tx_sent_queue will miss the update and cause the queue to
1991 * be stopped forever
1995 if (dql_avail(&dev_queue->dql) < 0)
1998 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
1999 netif_schedule_queue(dev_queue);
2003 static inline void netdev_completed_queue(struct net_device *dev,
2004 unsigned int pkts, unsigned int bytes)
2006 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2009 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2012 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
2017 static inline void netdev_reset_queue(struct net_device *dev_queue)
2019 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2023 * netif_running - test if up
2024 * @dev: network device
2026 * Test if the device has been brought up.
2028 static inline bool netif_running(const struct net_device *dev)
2030 return test_bit(__LINK_STATE_START, &dev->state);
2034 * Routines to manage the subqueues on a device. We only need start
2035 * stop, and a check if it's stopped. All other device management is
2036 * done at the overall netdevice level.
2037 * Also test the device if we're multiqueue.
2041 * netif_start_subqueue - allow sending packets on subqueue
2042 * @dev: network device
2043 * @queue_index: sub queue index
2045 * Start individual transmit queue of a device with multiple transmit queues.
2047 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2049 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2051 netif_tx_start_queue(txq);
2055 * netif_stop_subqueue - stop sending packets on subqueue
2056 * @dev: network device
2057 * @queue_index: sub queue index
2059 * Stop individual transmit queue of a device with multiple transmit queues.
2061 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
2063 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2064 #ifdef CONFIG_NETPOLL_TRAP
2068 netif_tx_stop_queue(txq);
2072 * netif_subqueue_stopped - test status of subqueue
2073 * @dev: network device
2074 * @queue_index: sub queue index
2076 * Check individual transmit queue of a device with multiple transmit queues.
2078 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
2081 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2083 return netif_tx_queue_stopped(txq);
2086 static inline bool netif_subqueue_stopped(const struct net_device *dev,
2087 struct sk_buff *skb)
2089 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
2093 * netif_wake_subqueue - allow sending packets on subqueue
2094 * @dev: network device
2095 * @queue_index: sub queue index
2097 * Resume individual transmit queue of a device with multiple transmit queues.
2099 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
2101 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2102 #ifdef CONFIG_NETPOLL_TRAP
2106 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
2107 __netif_schedule(txq->qdisc);
2111 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2112 * as a distribution range limit for the returned value.
2114 static inline u16 skb_tx_hash(const struct net_device *dev,
2115 const struct sk_buff *skb)
2117 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2121 * netif_is_multiqueue - test if device has multiple transmit queues
2122 * @dev: network device
2124 * Check if device has multiple transmit queues
2126 static inline bool netif_is_multiqueue(const struct net_device *dev)
2128 return dev->num_tx_queues > 1;
2131 extern int netif_set_real_num_tx_queues(struct net_device *dev,
2135 extern int netif_set_real_num_rx_queues(struct net_device *dev,
2138 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2145 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
2146 const struct net_device *from_dev)
2150 err = netif_set_real_num_tx_queues(to_dev,
2151 from_dev->real_num_tx_queues);
2155 return netif_set_real_num_rx_queues(to_dev,
2156 from_dev->real_num_rx_queues);
2162 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2163 extern int netif_get_num_default_rss_queues(void);
2165 /* Use this variant when it is known for sure that it
2166 * is executing from hardware interrupt context or with hardware interrupts
2169 extern void dev_kfree_skb_irq(struct sk_buff *skb);
2171 /* Use this variant in places where it could be invoked
2172 * from either hardware interrupt or other context, with hardware interrupts
2173 * either disabled or enabled.
2175 extern void dev_kfree_skb_any(struct sk_buff *skb);
2177 extern int netif_rx(struct sk_buff *skb);
2178 extern int netif_rx_ni(struct sk_buff *skb);
2179 extern int netif_receive_skb(struct sk_buff *skb);
2180 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
2181 struct sk_buff *skb);
2182 extern void napi_gro_flush(struct napi_struct *napi, bool flush_old);
2183 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
2184 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
2186 static inline void napi_free_frags(struct napi_struct *napi)
2188 kfree_skb(napi->skb);
2192 extern int netdev_rx_handler_register(struct net_device *dev,
2193 rx_handler_func_t *rx_handler,
2194 void *rx_handler_data);
2195 extern void netdev_rx_handler_unregister(struct net_device *dev);
2197 extern bool dev_valid_name(const char *name);
2198 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2199 extern int dev_ethtool(struct net *net, struct ifreq *);
2200 extern unsigned int dev_get_flags(const struct net_device *);
2201 extern int __dev_change_flags(struct net_device *, unsigned int flags);
2202 extern int dev_change_flags(struct net_device *, unsigned int);
2203 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
2204 extern int dev_change_name(struct net_device *, const char *);
2205 extern int dev_set_alias(struct net_device *, const char *, size_t);
2206 extern int dev_change_net_namespace(struct net_device *,
2207 struct net *, const char *);
2208 extern int dev_set_mtu(struct net_device *, int);
2209 extern void dev_set_group(struct net_device *, int);
2210 extern int dev_set_mac_address(struct net_device *,
2212 extern int dev_change_carrier(struct net_device *,
2214 extern int dev_hard_start_xmit(struct sk_buff *skb,
2215 struct net_device *dev,
2216 struct netdev_queue *txq);
2217 extern int dev_forward_skb(struct net_device *dev,
2218 struct sk_buff *skb);
2220 extern int netdev_budget;
2222 /* Called by rtnetlink.c:rtnl_unlock() */
2223 extern void netdev_run_todo(void);
2226 * dev_put - release reference to device
2227 * @dev: network device
2229 * Release reference to device to allow it to be freed.
2231 static inline void dev_put(struct net_device *dev)
2233 this_cpu_dec(*dev->pcpu_refcnt);
2237 * dev_hold - get reference to device
2238 * @dev: network device
2240 * Hold reference to device to keep it from being freed.
2242 static inline void dev_hold(struct net_device *dev)
2244 this_cpu_inc(*dev->pcpu_refcnt);
2247 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2248 * and _off may be called from IRQ context, but it is caller
2249 * who is responsible for serialization of these calls.
2251 * The name carrier is inappropriate, these functions should really be
2252 * called netif_lowerlayer_*() because they represent the state of any
2253 * kind of lower layer not just hardware media.
2256 extern void linkwatch_init_dev(struct net_device *dev);
2257 extern void linkwatch_fire_event(struct net_device *dev);
2258 extern void linkwatch_forget_dev(struct net_device *dev);
2261 * netif_carrier_ok - test if carrier present
2262 * @dev: network device
2264 * Check if carrier is present on device
2266 static inline bool netif_carrier_ok(const struct net_device *dev)
2268 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2271 extern unsigned long dev_trans_start(struct net_device *dev);
2273 extern void __netdev_watchdog_up(struct net_device *dev);
2275 extern void netif_carrier_on(struct net_device *dev);
2277 extern void netif_carrier_off(struct net_device *dev);
2280 * netif_dormant_on - mark device as dormant.
2281 * @dev: network device
2283 * Mark device as dormant (as per RFC2863).
2285 * The dormant state indicates that the relevant interface is not
2286 * actually in a condition to pass packets (i.e., it is not 'up') but is
2287 * in a "pending" state, waiting for some external event. For "on-
2288 * demand" interfaces, this new state identifies the situation where the
2289 * interface is waiting for events to place it in the up state.
2292 static inline void netif_dormant_on(struct net_device *dev)
2294 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2295 linkwatch_fire_event(dev);
2299 * netif_dormant_off - set device as not dormant.
2300 * @dev: network device
2302 * Device is not in dormant state.
2304 static inline void netif_dormant_off(struct net_device *dev)
2306 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2307 linkwatch_fire_event(dev);
2311 * netif_dormant - test if carrier present
2312 * @dev: network device
2314 * Check if carrier is present on device
2316 static inline bool netif_dormant(const struct net_device *dev)
2318 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2323 * netif_oper_up - test if device is operational
2324 * @dev: network device
2326 * Check if carrier is operational
2328 static inline bool netif_oper_up(const struct net_device *dev)
2330 return (dev->operstate == IF_OPER_UP ||
2331 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2335 * netif_device_present - is device available or removed
2336 * @dev: network device
2338 * Check if device has not been removed from system.
2340 static inline bool netif_device_present(struct net_device *dev)
2342 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2345 extern void netif_device_detach(struct net_device *dev);
2347 extern void netif_device_attach(struct net_device *dev);
2350 * Network interface message level settings
2354 NETIF_MSG_DRV = 0x0001,
2355 NETIF_MSG_PROBE = 0x0002,
2356 NETIF_MSG_LINK = 0x0004,
2357 NETIF_MSG_TIMER = 0x0008,
2358 NETIF_MSG_IFDOWN = 0x0010,
2359 NETIF_MSG_IFUP = 0x0020,
2360 NETIF_MSG_RX_ERR = 0x0040,
2361 NETIF_MSG_TX_ERR = 0x0080,
2362 NETIF_MSG_TX_QUEUED = 0x0100,
2363 NETIF_MSG_INTR = 0x0200,
2364 NETIF_MSG_TX_DONE = 0x0400,
2365 NETIF_MSG_RX_STATUS = 0x0800,
2366 NETIF_MSG_PKTDATA = 0x1000,
2367 NETIF_MSG_HW = 0x2000,
2368 NETIF_MSG_WOL = 0x4000,
2371 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2372 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2373 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2374 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2375 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2376 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2377 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2378 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2379 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2380 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2381 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2382 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2383 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2384 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2385 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2387 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2390 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2391 return default_msg_enable_bits;
2392 if (debug_value == 0) /* no output */
2394 /* set low N bits */
2395 return (1 << debug_value) - 1;
2398 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2400 spin_lock(&txq->_xmit_lock);
2401 txq->xmit_lock_owner = cpu;
2404 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2406 spin_lock_bh(&txq->_xmit_lock);
2407 txq->xmit_lock_owner = smp_processor_id();
2410 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
2412 bool ok = spin_trylock(&txq->_xmit_lock);
2414 txq->xmit_lock_owner = smp_processor_id();
2418 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2420 txq->xmit_lock_owner = -1;
2421 spin_unlock(&txq->_xmit_lock);
2424 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2426 txq->xmit_lock_owner = -1;
2427 spin_unlock_bh(&txq->_xmit_lock);
2430 static inline void txq_trans_update(struct netdev_queue *txq)
2432 if (txq->xmit_lock_owner != -1)
2433 txq->trans_start = jiffies;
2437 * netif_tx_lock - grab network device transmit lock
2438 * @dev: network device
2440 * Get network device transmit lock
2442 static inline void netif_tx_lock(struct net_device *dev)
2447 spin_lock(&dev->tx_global_lock);
2448 cpu = smp_processor_id();
2449 for (i = 0; i < dev->num_tx_queues; i++) {
2450 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2452 /* We are the only thread of execution doing a
2453 * freeze, but we have to grab the _xmit_lock in
2454 * order to synchronize with threads which are in
2455 * the ->hard_start_xmit() handler and already
2456 * checked the frozen bit.
2458 __netif_tx_lock(txq, cpu);
2459 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2460 __netif_tx_unlock(txq);
2464 static inline void netif_tx_lock_bh(struct net_device *dev)
2470 static inline void netif_tx_unlock(struct net_device *dev)
2474 for (i = 0; i < dev->num_tx_queues; i++) {
2475 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2477 /* No need to grab the _xmit_lock here. If the
2478 * queue is not stopped for another reason, we
2481 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2482 netif_schedule_queue(txq);
2484 spin_unlock(&dev->tx_global_lock);
2487 static inline void netif_tx_unlock_bh(struct net_device *dev)
2489 netif_tx_unlock(dev);
2493 #define HARD_TX_LOCK(dev, txq, cpu) { \
2494 if ((dev->features & NETIF_F_LLTX) == 0) { \
2495 __netif_tx_lock(txq, cpu); \
2499 #define HARD_TX_UNLOCK(dev, txq) { \
2500 if ((dev->features & NETIF_F_LLTX) == 0) { \
2501 __netif_tx_unlock(txq); \
2505 static inline void netif_tx_disable(struct net_device *dev)
2511 cpu = smp_processor_id();
2512 for (i = 0; i < dev->num_tx_queues; i++) {
2513 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2515 __netif_tx_lock(txq, cpu);
2516 netif_tx_stop_queue(txq);
2517 __netif_tx_unlock(txq);
2522 static inline void netif_addr_lock(struct net_device *dev)
2524 spin_lock(&dev->addr_list_lock);
2527 static inline void netif_addr_lock_nested(struct net_device *dev)
2529 spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING);
2532 static inline void netif_addr_lock_bh(struct net_device *dev)
2534 spin_lock_bh(&dev->addr_list_lock);
2537 static inline void netif_addr_unlock(struct net_device *dev)
2539 spin_unlock(&dev->addr_list_lock);
2542 static inline void netif_addr_unlock_bh(struct net_device *dev)
2544 spin_unlock_bh(&dev->addr_list_lock);
2548 * dev_addrs walker. Should be used only for read access. Call with
2549 * rcu_read_lock held.
2551 #define for_each_dev_addr(dev, ha) \
2552 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2554 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2556 extern void ether_setup(struct net_device *dev);
2558 /* Support for loadable net-drivers */
2559 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2560 void (*setup)(struct net_device *),
2561 unsigned int txqs, unsigned int rxqs);
2562 #define alloc_netdev(sizeof_priv, name, setup) \
2563 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2565 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2566 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2568 extern int register_netdev(struct net_device *dev);
2569 extern void unregister_netdev(struct net_device *dev);
2571 /* General hardware address lists handling functions */
2572 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2573 struct netdev_hw_addr_list *from_list,
2574 int addr_len, unsigned char addr_type);
2575 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2576 struct netdev_hw_addr_list *from_list,
2577 int addr_len, unsigned char addr_type);
2578 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2579 struct netdev_hw_addr_list *from_list,
2581 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2582 struct netdev_hw_addr_list *from_list,
2584 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2585 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2587 /* Functions used for device addresses handling */
2588 extern int dev_addr_add(struct net_device *dev, const unsigned char *addr,
2589 unsigned char addr_type);
2590 extern int dev_addr_del(struct net_device *dev, const unsigned char *addr,
2591 unsigned char addr_type);
2592 extern int dev_addr_add_multiple(struct net_device *to_dev,
2593 struct net_device *from_dev,
2594 unsigned char addr_type);
2595 extern int dev_addr_del_multiple(struct net_device *to_dev,
2596 struct net_device *from_dev,
2597 unsigned char addr_type);
2598 extern void dev_addr_flush(struct net_device *dev);
2599 extern int dev_addr_init(struct net_device *dev);
2601 /* Functions used for unicast addresses handling */
2602 extern int dev_uc_add(struct net_device *dev, const unsigned char *addr);
2603 extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
2604 extern int dev_uc_del(struct net_device *dev, const unsigned char *addr);
2605 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2606 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2607 extern void dev_uc_flush(struct net_device *dev);
2608 extern void dev_uc_init(struct net_device *dev);
2610 /* Functions used for multicast addresses handling */
2611 extern int dev_mc_add(struct net_device *dev, const unsigned char *addr);
2612 extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
2613 extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
2614 extern int dev_mc_del(struct net_device *dev, const unsigned char *addr);
2615 extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
2616 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2617 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2618 extern void dev_mc_flush(struct net_device *dev);
2619 extern void dev_mc_init(struct net_device *dev);
2621 /* Functions used for secondary unicast and multicast support */
2622 extern void dev_set_rx_mode(struct net_device *dev);
2623 extern void __dev_set_rx_mode(struct net_device *dev);
2624 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2625 extern int dev_set_allmulti(struct net_device *dev, int inc);
2626 extern void netdev_state_change(struct net_device *dev);
2627 extern void netdev_notify_peers(struct net_device *dev);
2628 extern void netdev_features_change(struct net_device *dev);
2629 /* Load a device via the kmod */
2630 extern void dev_load(struct net *net, const char *name);
2631 extern void dev_mcast_init(void);
2632 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2633 struct rtnl_link_stats64 *storage);
2634 extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
2635 const struct net_device_stats *netdev_stats);
2637 extern int netdev_max_backlog;
2638 extern int netdev_tstamp_prequeue;
2639 extern int weight_p;
2640 extern int bpf_jit_enable;
2642 extern bool netdev_has_upper_dev(struct net_device *dev,
2643 struct net_device *upper_dev);
2644 extern bool netdev_has_any_upper_dev(struct net_device *dev);
2645 extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
2646 extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
2647 extern int netdev_upper_dev_link(struct net_device *dev,
2648 struct net_device *upper_dev);
2649 extern int netdev_master_upper_dev_link(struct net_device *dev,
2650 struct net_device *upper_dev);
2651 extern void netdev_upper_dev_unlink(struct net_device *dev,
2652 struct net_device *upper_dev);
2653 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2654 extern int netdev_set_bond_master(struct net_device *dev,
2655 struct net_device *master);
2656 extern int skb_checksum_help(struct sk_buff *skb);
2657 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb,
2658 netdev_features_t features);
2660 extern void netdev_rx_csum_fault(struct net_device *dev);
2662 static inline void netdev_rx_csum_fault(struct net_device *dev)
2666 /* rx skb timestamps */
2667 extern void net_enable_timestamp(void);
2668 extern void net_disable_timestamp(void);
2670 #ifdef CONFIG_PROC_FS
2671 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2672 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2673 extern void dev_seq_stop(struct seq_file *seq, void *v);
2676 extern int netdev_class_create_file(struct class_attribute *class_attr);
2677 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2679 extern struct kobj_ns_type_operations net_ns_type_operations;
2681 extern const char *netdev_drivername(const struct net_device *dev);
2683 extern void linkwatch_run_queue(void);
2685 static inline netdev_features_t netdev_get_wanted_features(
2686 struct net_device *dev)
2688 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2690 netdev_features_t netdev_increment_features(netdev_features_t all,
2691 netdev_features_t one, netdev_features_t mask);
2692 int __netdev_update_features(struct net_device *dev);
2693 void netdev_update_features(struct net_device *dev);
2694 void netdev_change_features(struct net_device *dev);
2696 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2697 struct net_device *dev);
2699 netdev_features_t netif_skb_features(struct sk_buff *skb);
2701 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
2703 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
2705 /* check flags correspondence */
2706 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
2707 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
2708 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
2709 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
2710 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
2711 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
2713 return (features & feature) == feature;
2716 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
2718 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2719 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2722 static inline bool netif_needs_gso(struct sk_buff *skb,
2723 netdev_features_t features)
2725 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2726 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
2727 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
2730 static inline void netif_set_gso_max_size(struct net_device *dev,
2733 dev->gso_max_size = size;
2736 static inline bool netif_is_bond_slave(struct net_device *dev)
2738 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2741 static inline bool netif_supports_nofcs(struct net_device *dev)
2743 return dev->priv_flags & IFF_SUPP_NOFCS;
2746 extern struct pernet_operations __net_initdata loopback_net_ops;
2748 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2750 /* netdev_printk helpers, similar to dev_printk */
2752 static inline const char *netdev_name(const struct net_device *dev)
2754 if (dev->reg_state != NETREG_REGISTERED)
2755 return "(unregistered net_device)";
2759 extern __printf(3, 4)
2760 int netdev_printk(const char *level, const struct net_device *dev,
2761 const char *format, ...);
2762 extern __printf(2, 3)
2763 int netdev_emerg(const struct net_device *dev, const char *format, ...);
2764 extern __printf(2, 3)
2765 int netdev_alert(const struct net_device *dev, const char *format, ...);
2766 extern __printf(2, 3)
2767 int netdev_crit(const struct net_device *dev, const char *format, ...);
2768 extern __printf(2, 3)
2769 int netdev_err(const struct net_device *dev, const char *format, ...);
2770 extern __printf(2, 3)
2771 int netdev_warn(const struct net_device *dev, const char *format, ...);
2772 extern __printf(2, 3)
2773 int netdev_notice(const struct net_device *dev, const char *format, ...);
2774 extern __printf(2, 3)
2775 int netdev_info(const struct net_device *dev, const char *format, ...);
2777 #define MODULE_ALIAS_NETDEV(device) \
2778 MODULE_ALIAS("netdev-" device)
2780 #if defined(CONFIG_DYNAMIC_DEBUG)
2781 #define netdev_dbg(__dev, format, args...) \
2783 dynamic_netdev_dbg(__dev, format, ##args); \
2785 #elif defined(DEBUG)
2786 #define netdev_dbg(__dev, format, args...) \
2787 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2789 #define netdev_dbg(__dev, format, args...) \
2792 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2797 #if defined(VERBOSE_DEBUG)
2798 #define netdev_vdbg netdev_dbg
2801 #define netdev_vdbg(dev, format, args...) \
2804 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2810 * netdev_WARN() acts like dev_printk(), but with the key difference
2811 * of using a WARN/WARN_ON to get the message out, including the
2812 * file/line information and a backtrace.
2814 #define netdev_WARN(dev, format, args...) \
2815 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2817 /* netif printk helpers, similar to netdev_printk */
2819 #define netif_printk(priv, type, level, dev, fmt, args...) \
2821 if (netif_msg_##type(priv)) \
2822 netdev_printk(level, (dev), fmt, ##args); \
2825 #define netif_level(level, priv, type, dev, fmt, args...) \
2827 if (netif_msg_##type(priv)) \
2828 netdev_##level(dev, fmt, ##args); \
2831 #define netif_emerg(priv, type, dev, fmt, args...) \
2832 netif_level(emerg, priv, type, dev, fmt, ##args)
2833 #define netif_alert(priv, type, dev, fmt, args...) \
2834 netif_level(alert, priv, type, dev, fmt, ##args)
2835 #define netif_crit(priv, type, dev, fmt, args...) \
2836 netif_level(crit, priv, type, dev, fmt, ##args)
2837 #define netif_err(priv, type, dev, fmt, args...) \
2838 netif_level(err, priv, type, dev, fmt, ##args)
2839 #define netif_warn(priv, type, dev, fmt, args...) \
2840 netif_level(warn, priv, type, dev, fmt, ##args)
2841 #define netif_notice(priv, type, dev, fmt, args...) \
2842 netif_level(notice, priv, type, dev, fmt, ##args)
2843 #define netif_info(priv, type, dev, fmt, args...) \
2844 netif_level(info, priv, type, dev, fmt, ##args)
2846 #if defined(CONFIG_DYNAMIC_DEBUG)
2847 #define netif_dbg(priv, type, netdev, format, args...) \
2849 if (netif_msg_##type(priv)) \
2850 dynamic_netdev_dbg(netdev, format, ##args); \
2852 #elif defined(DEBUG)
2853 #define netif_dbg(priv, type, dev, format, args...) \
2854 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2856 #define netif_dbg(priv, type, dev, format, args...) \
2859 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2864 #if defined(VERBOSE_DEBUG)
2865 #define netif_vdbg netif_dbg
2867 #define netif_vdbg(priv, type, dev, format, args...) \
2870 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2875 #endif /* _LINUX_NETDEVICE_H */