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 extern void netdev_set_default_ethtool_ops(struct net_device *dev,
64 const struct 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 */
70 #define NET_ADDR_SET 3 /* address is set using
71 * dev_set_mac_address() */
73 /* Backlog congestion levels */
74 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
75 #define NET_RX_DROP 1 /* packet dropped */
78 * Transmit return codes: transmit return codes originate from three different
81 * - qdisc return codes
82 * - driver transmit return codes
85 * Drivers are allowed to return any one of those in their hard_start_xmit()
86 * function. Real network devices commonly used with qdiscs should only return
87 * the driver transmit return codes though - when qdiscs are used, the actual
88 * transmission happens asynchronously, so the value is not propagated to
89 * higher layers. Virtual network devices transmit synchronously, in this case
90 * the driver transmit return codes are consumed by dev_queue_xmit(), all
91 * others are propagated to higher layers.
94 /* qdisc ->enqueue() return codes. */
95 #define NET_XMIT_SUCCESS 0x00
96 #define NET_XMIT_DROP 0x01 /* skb dropped */
97 #define NET_XMIT_CN 0x02 /* congestion notification */
98 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
99 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
101 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
102 * indicates that the device will soon be dropping packets, or already drops
103 * some packets of the same priority; prompting us to send less aggressively. */
104 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
105 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107 /* Driver transmit return codes */
108 #define NETDEV_TX_MASK 0xf0
111 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
112 NETDEV_TX_OK = 0x00, /* driver took care of packet */
113 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
114 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
116 typedef enum netdev_tx netdev_tx_t;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc < NET_XMIT_MASK))
137 * Compute the worst case header length according to the protocols
141 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
147 #elif IS_ENABLED(CONFIG_TR)
148 # define LL_MAX_HEADER 48
150 # define LL_MAX_HEADER 32
153 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
154 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
155 #define MAX_HEADER LL_MAX_HEADER
157 #define MAX_HEADER (LL_MAX_HEADER + 48)
161 * Old network device statistics. Fields are native words
162 * (unsigned long) so they can be read and written atomically.
165 struct net_device_stats {
166 unsigned long rx_packets;
167 unsigned long tx_packets;
168 unsigned long rx_bytes;
169 unsigned long tx_bytes;
170 unsigned long rx_errors;
171 unsigned long tx_errors;
172 unsigned long rx_dropped;
173 unsigned long tx_dropped;
174 unsigned long multicast;
175 unsigned long collisions;
176 unsigned long rx_length_errors;
177 unsigned long rx_over_errors;
178 unsigned long rx_crc_errors;
179 unsigned long rx_frame_errors;
180 unsigned long rx_fifo_errors;
181 unsigned long rx_missed_errors;
182 unsigned long tx_aborted_errors;
183 unsigned long tx_carrier_errors;
184 unsigned long tx_fifo_errors;
185 unsigned long tx_heartbeat_errors;
186 unsigned long tx_window_errors;
187 unsigned long rx_compressed;
188 unsigned long tx_compressed;
192 #include <linux/cache.h>
193 #include <linux/skbuff.h>
196 #include <linux/static_key.h>
197 extern struct static_key rps_needed;
204 struct netdev_hw_addr {
205 struct list_head list;
206 unsigned char addr[MAX_ADDR_LEN];
208 #define NETDEV_HW_ADDR_T_LAN 1
209 #define NETDEV_HW_ADDR_T_SAN 2
210 #define NETDEV_HW_ADDR_T_SLAVE 3
211 #define NETDEV_HW_ADDR_T_UNICAST 4
212 #define NETDEV_HW_ADDR_T_MULTICAST 5
216 struct rcu_head rcu_head;
219 struct netdev_hw_addr_list {
220 struct list_head list;
224 #define netdev_hw_addr_list_count(l) ((l)->count)
225 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
226 #define netdev_hw_addr_list_for_each(ha, l) \
227 list_for_each_entry(ha, &(l)->list, list)
229 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
230 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
231 #define netdev_for_each_uc_addr(ha, dev) \
232 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
234 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
235 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
236 #define netdev_for_each_mc_addr(ha, dev) \
237 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
244 /* cached hardware header; allow for machine alignment needs. */
245 #define HH_DATA_MOD 16
246 #define HH_DATA_OFF(__len) \
247 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
248 #define HH_DATA_ALIGN(__len) \
249 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
250 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
253 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
255 * dev->hard_header_len ? (dev->hard_header_len +
256 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
258 * We could use other alignment values, but we must maintain the
259 * relationship HH alignment <= LL alignment.
261 #define LL_RESERVED_SPACE(dev) \
262 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
263 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
264 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 int (*create) (struct sk_buff *skb, struct net_device *dev,
268 unsigned short type, const void *daddr,
269 const void *saddr, unsigned int len);
270 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
271 int (*rebuild)(struct sk_buff *skb);
272 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
273 void (*cache_update)(struct hh_cache *hh,
274 const struct net_device *dev,
275 const unsigned char *haddr);
278 /* These flag bits are private to the generic network queueing
279 * layer, they may not be explicitly referenced by any other
283 enum netdev_state_t {
285 __LINK_STATE_PRESENT,
286 __LINK_STATE_NOCARRIER,
287 __LINK_STATE_LINKWATCH_PENDING,
288 __LINK_STATE_DORMANT,
293 * This structure holds at boot time configured netdevice settings. They
294 * are then used in the device probing.
296 struct netdev_boot_setup {
300 #define NETDEV_BOOT_SETUP_MAX 8
302 extern int __init netdev_boot_setup(char *str);
305 * Structure for NAPI scheduling similar to tasklet but with weighting
308 /* The poll_list must only be managed by the entity which
309 * changes the state of the NAPI_STATE_SCHED bit. This means
310 * whoever atomically sets that bit can add this napi_struct
311 * to the per-cpu poll_list, and whoever clears that bit
312 * can remove from the list right before clearing the bit.
314 struct list_head poll_list;
318 unsigned int gro_count;
319 int (*poll)(struct napi_struct *, int);
320 #ifdef CONFIG_NETPOLL
321 spinlock_t poll_lock;
324 struct net_device *dev;
325 struct sk_buff *gro_list;
327 struct list_head dev_list;
331 NAPI_STATE_SCHED, /* Poll is scheduled */
332 NAPI_STATE_DISABLE, /* Disable pending */
333 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
343 typedef enum gro_result gro_result_t;
346 * enum rx_handler_result - Possible return values for rx_handlers.
347 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
349 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
350 * case skb->dev was changed by rx_handler.
351 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
352 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
354 * rx_handlers are functions called from inside __netif_receive_skb(), to do
355 * special processing of the skb, prior to delivery to protocol handlers.
357 * Currently, a net_device can only have a single rx_handler registered. Trying
358 * to register a second rx_handler will return -EBUSY.
360 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
361 * To unregister a rx_handler on a net_device, use
362 * netdev_rx_handler_unregister().
364 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
367 * If the rx_handler consumed to skb in some way, it should return
368 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
369 * the skb to be delivered in some other ways.
371 * If the rx_handler changed skb->dev, to divert the skb to another
372 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
373 * new device will be called if it exists.
375 * If the rx_handler consider the skb should be ignored, it should return
376 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
377 * are registered on exact device (ptype->dev == skb->dev).
379 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
380 * delivered, it should return RX_HANDLER_PASS.
382 * A device without a registered rx_handler will behave as if rx_handler
383 * returned RX_HANDLER_PASS.
386 enum rx_handler_result {
392 typedef enum rx_handler_result rx_handler_result_t;
393 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
395 extern void __napi_schedule(struct napi_struct *n);
397 static inline bool napi_disable_pending(struct napi_struct *n)
399 return test_bit(NAPI_STATE_DISABLE, &n->state);
403 * napi_schedule_prep - check if napi can be scheduled
406 * Test if NAPI routine is already running, and if not mark
407 * it as running. This is used as a condition variable
408 * insure only one NAPI poll instance runs. We also make
409 * sure there is no pending NAPI disable.
411 static inline bool napi_schedule_prep(struct napi_struct *n)
413 return !napi_disable_pending(n) &&
414 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
418 * napi_schedule - schedule NAPI poll
421 * Schedule NAPI poll routine to be called if it is not already
424 static inline void napi_schedule(struct napi_struct *n)
426 if (napi_schedule_prep(n))
430 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
431 static inline bool napi_reschedule(struct napi_struct *napi)
433 if (napi_schedule_prep(napi)) {
434 __napi_schedule(napi);
441 * napi_complete - NAPI processing complete
444 * Mark NAPI processing as complete.
446 extern void __napi_complete(struct napi_struct *n);
447 extern void napi_complete(struct napi_struct *n);
450 * napi_disable - prevent NAPI from scheduling
453 * Stop NAPI from being scheduled on this context.
454 * Waits till any outstanding processing completes.
456 static inline void napi_disable(struct napi_struct *n)
458 set_bit(NAPI_STATE_DISABLE, &n->state);
459 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
461 clear_bit(NAPI_STATE_DISABLE, &n->state);
465 * napi_enable - enable NAPI scheduling
468 * Resume NAPI from being scheduled on this context.
469 * Must be paired with napi_disable.
471 static inline void napi_enable(struct napi_struct *n)
473 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
474 smp_mb__before_clear_bit();
475 clear_bit(NAPI_STATE_SCHED, &n->state);
480 * napi_synchronize - wait until NAPI is not running
483 * Wait until NAPI is done being scheduled on this context.
484 * Waits till any outstanding processing completes but
485 * does not disable future activations.
487 static inline void napi_synchronize(const struct napi_struct *n)
489 while (test_bit(NAPI_STATE_SCHED, &n->state))
493 # define napi_synchronize(n) barrier()
496 enum netdev_queue_state_t {
497 __QUEUE_STATE_DRV_XOFF,
498 __QUEUE_STATE_STACK_XOFF,
499 __QUEUE_STATE_FROZEN,
500 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
501 (1 << __QUEUE_STATE_STACK_XOFF))
502 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
503 (1 << __QUEUE_STATE_FROZEN))
506 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
507 * netif_tx_* functions below are used to manipulate this flag. The
508 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
509 * queue independently. The netif_xmit_*stopped functions below are called
510 * to check if the queue has been stopped by the driver or stack (either
511 * of the XOFF bits are set in the state). Drivers should not need to call
512 * netif_xmit*stopped functions, they should only be using netif_tx_*.
515 struct netdev_queue {
519 struct net_device *dev;
521 struct Qdisc *qdisc_sleeping;
525 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
531 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
534 * please use this field instead of dev->trans_start
536 unsigned long trans_start;
539 * Number of TX timeouts for this queue
540 * (/sys/class/net/DEV/Q/trans_timeout)
542 unsigned long trans_timeout;
549 } ____cacheline_aligned_in_smp;
551 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
553 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
560 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
562 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
569 * This structure holds an RPS map which can be of variable length. The
570 * map is an array of CPUs.
577 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
580 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
581 * tail pointer for that CPU's input queue at the time of last enqueue, and
582 * a hardware filter index.
584 struct rps_dev_flow {
587 unsigned int last_qtail;
589 #define RPS_NO_FILTER 0xffff
592 * The rps_dev_flow_table structure contains a table of flow mappings.
594 struct rps_dev_flow_table {
597 struct work_struct free_work;
598 struct rps_dev_flow flows[0];
600 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
601 ((_num) * sizeof(struct rps_dev_flow)))
604 * The rps_sock_flow_table contains mappings of flows to the last CPU
605 * on which they were processed by the application (set in recvmsg).
607 struct rps_sock_flow_table {
611 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
612 ((_num) * sizeof(u16)))
614 #define RPS_NO_CPU 0xffff
616 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
620 unsigned int cpu, index = hash & table->mask;
622 /* We only give a hint, preemption can change cpu under us */
623 cpu = raw_smp_processor_id();
625 if (table->ents[index] != cpu)
626 table->ents[index] = cpu;
630 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
634 table->ents[hash & table->mask] = RPS_NO_CPU;
637 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
639 #ifdef CONFIG_RFS_ACCEL
640 extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
641 u32 flow_id, u16 filter_id);
644 /* This structure contains an instance of an RX queue. */
645 struct netdev_rx_queue {
646 struct rps_map __rcu *rps_map;
647 struct rps_dev_flow_table __rcu *rps_flow_table;
649 struct net_device *dev;
650 } ____cacheline_aligned_in_smp;
651 #endif /* CONFIG_RPS */
655 * This structure holds an XPS map which can be of variable length. The
656 * map is an array of queues.
660 unsigned int alloc_len;
664 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
665 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
669 * This structure holds all XPS maps for device. Maps are indexed by CPU.
671 struct xps_dev_maps {
673 struct xps_map __rcu *cpu_map[0];
675 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
676 (nr_cpu_ids * sizeof(struct xps_map *)))
677 #endif /* CONFIG_XPS */
679 #define TC_MAX_QUEUE 16
680 #define TC_BITMASK 15
681 /* HW offloaded queuing disciplines txq count and offset maps */
682 struct netdev_tc_txq {
687 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
689 * This structure is to hold information about the device
690 * configured to run FCoE protocol stack.
692 struct netdev_fcoe_hbainfo {
693 char manufacturer[64];
694 char serial_number[64];
695 char hardware_version[64];
696 char driver_version[64];
697 char optionrom_version[64];
698 char firmware_version[64];
700 char model_description[256];
705 * This structure defines the management hooks for network devices.
706 * The following hooks can be defined; unless noted otherwise, they are
707 * optional and can be filled with a null pointer.
709 * int (*ndo_init)(struct net_device *dev);
710 * This function is called once when network device is registered.
711 * The network device can use this to any late stage initializaton
712 * or semantic validattion. It can fail with an error code which will
713 * be propogated back to register_netdev
715 * void (*ndo_uninit)(struct net_device *dev);
716 * This function is called when device is unregistered or when registration
717 * fails. It is not called if init fails.
719 * int (*ndo_open)(struct net_device *dev);
720 * This function is called when network device transistions to the up
723 * int (*ndo_stop)(struct net_device *dev);
724 * This function is called when network device transistions to the down
727 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
728 * struct net_device *dev);
729 * Called when a packet needs to be transmitted.
730 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
731 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
732 * Required can not be NULL.
734 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
735 * Called to decide which queue to when device supports multiple
738 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
739 * This function is called to allow device receiver to make
740 * changes to configuration when multicast or promiscious is enabled.
742 * void (*ndo_set_rx_mode)(struct net_device *dev);
743 * This function is called device changes address list filtering.
744 * If driver handles unicast address filtering, it should set
745 * IFF_UNICAST_FLT to its priv_flags.
747 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
748 * This function is called when the Media Access Control address
749 * needs to be changed. If this interface is not defined, the
750 * mac address can not be changed.
752 * int (*ndo_validate_addr)(struct net_device *dev);
753 * Test if Media Access Control address is valid for the device.
755 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
756 * Called when a user request an ioctl which can't be handled by
757 * the generic interface code. If not defined ioctl's return
758 * not supported error code.
760 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
761 * Used to set network devices bus interface parameters. This interface
762 * is retained for legacy reason, new devices should use the bus
763 * interface (PCI) for low level management.
765 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
766 * Called when a user wants to change the Maximum Transfer Unit
767 * of a device. If not defined, any request to change MTU will
768 * will return an error.
770 * void (*ndo_tx_timeout)(struct net_device *dev);
771 * Callback uses when the transmitter has not made any progress
772 * for dev->watchdog ticks.
774 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
775 * struct rtnl_link_stats64 *storage);
776 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
777 * Called when a user wants to get the network device usage
778 * statistics. Drivers must do one of the following:
779 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
780 * rtnl_link_stats64 structure passed by the caller.
781 * 2. Define @ndo_get_stats to update a net_device_stats structure
782 * (which should normally be dev->stats) and return a pointer to
783 * it. The structure may be changed asynchronously only if each
784 * field is written atomically.
785 * 3. Update dev->stats asynchronously and atomically, and define
788 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
789 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
790 * this function is called when a VLAN id is registered.
792 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
793 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
794 * this function is called when a VLAN id is unregistered.
796 * void (*ndo_poll_controller)(struct net_device *dev);
798 * SR-IOV management functions.
799 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
800 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
801 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
802 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
803 * int (*ndo_get_vf_config)(struct net_device *dev,
804 * int vf, struct ifla_vf_info *ivf);
805 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
806 * struct nlattr *port[]);
807 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
808 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
809 * Called to setup 'tc' number of traffic classes in the net device. This
810 * is always called from the stack with the rtnl lock held and netif tx
811 * queues stopped. This allows the netdevice to perform queue management
814 * Fiber Channel over Ethernet (FCoE) offload functions.
815 * int (*ndo_fcoe_enable)(struct net_device *dev);
816 * Called when the FCoE protocol stack wants to start using LLD for FCoE
817 * so the underlying device can perform whatever needed configuration or
818 * initialization to support acceleration of FCoE traffic.
820 * int (*ndo_fcoe_disable)(struct net_device *dev);
821 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
822 * so the underlying device can perform whatever needed clean-ups to
823 * stop supporting acceleration of FCoE traffic.
825 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
826 * struct scatterlist *sgl, unsigned int sgc);
827 * Called when the FCoE Initiator wants to initialize an I/O that
828 * is a possible candidate for Direct Data Placement (DDP). The LLD can
829 * perform necessary setup and returns 1 to indicate the device is set up
830 * successfully to perform DDP on this I/O, otherwise this returns 0.
832 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
833 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
834 * indicated by the FC exchange id 'xid', so the underlying device can
835 * clean up and reuse resources for later DDP requests.
837 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
838 * struct scatterlist *sgl, unsigned int sgc);
839 * Called when the FCoE Target wants to initialize an I/O that
840 * is a possible candidate for Direct Data Placement (DDP). The LLD can
841 * perform necessary setup and returns 1 to indicate the device is set up
842 * successfully to perform DDP on this I/O, otherwise this returns 0.
844 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
845 * struct netdev_fcoe_hbainfo *hbainfo);
846 * Called when the FCoE Protocol stack wants information on the underlying
847 * device. This information is utilized by the FCoE protocol stack to
848 * register attributes with Fiber Channel management service as per the
849 * FC-GS Fabric Device Management Information(FDMI) specification.
851 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
852 * Called when the underlying device wants to override default World Wide
853 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
854 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
855 * protocol stack to use.
858 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
859 * u16 rxq_index, u32 flow_id);
860 * Set hardware filter for RFS. rxq_index is the target queue index;
861 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
862 * Return the filter ID on success, or a negative error code.
864 * Slave management functions (for bridge, bonding, etc).
865 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
866 * Called to make another netdev an underling.
868 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
869 * Called to release previously enslaved netdev.
871 * Feature/offload setting functions.
872 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
873 * netdev_features_t features);
874 * Adjusts the requested feature flags according to device-specific
875 * constraints, and returns the resulting flags. Must not modify
878 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
879 * Called to update device configuration to new features. Passed
880 * feature set might be less than what was returned by ndo_fix_features()).
881 * Must return >0 or -errno if it changed dev->features itself.
883 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
884 * struct net_device *dev,
885 * const unsigned char *addr, u16 flags)
886 * Adds an FDB entry to dev for addr.
887 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev,
888 * const unsigned char *addr)
889 * Deletes the FDB entry from dev coresponding to addr.
890 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
891 * struct net_device *dev, int idx)
892 * Used to add FDB entries to dump requests. Implementers should add
893 * entries to skb and update idx with the number of entries.
895 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
896 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
897 * struct net_device *dev)
899 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
900 * Called to change device carrier. Soft-devices (like dummy, team, etc)
901 * which do not represent real hardware may define this to allow their
902 * userspace components to manage their virtual carrier state. Devices
903 * that determine carrier state from physical hardware properties (eg
904 * network cables) or protocol-dependent mechanisms (eg
905 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
907 struct net_device_ops {
908 int (*ndo_init)(struct net_device *dev);
909 void (*ndo_uninit)(struct net_device *dev);
910 int (*ndo_open)(struct net_device *dev);
911 int (*ndo_stop)(struct net_device *dev);
912 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
913 struct net_device *dev);
914 u16 (*ndo_select_queue)(struct net_device *dev,
915 struct sk_buff *skb);
916 void (*ndo_change_rx_flags)(struct net_device *dev,
918 void (*ndo_set_rx_mode)(struct net_device *dev);
919 int (*ndo_set_mac_address)(struct net_device *dev,
921 int (*ndo_validate_addr)(struct net_device *dev);
922 int (*ndo_do_ioctl)(struct net_device *dev,
923 struct ifreq *ifr, int cmd);
924 int (*ndo_set_config)(struct net_device *dev,
926 int (*ndo_change_mtu)(struct net_device *dev,
928 int (*ndo_neigh_setup)(struct net_device *dev,
929 struct neigh_parms *);
930 void (*ndo_tx_timeout) (struct net_device *dev);
932 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
933 struct rtnl_link_stats64 *storage);
934 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
936 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
938 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
940 #ifdef CONFIG_NET_POLL_CONTROLLER
941 void (*ndo_poll_controller)(struct net_device *dev);
942 int (*ndo_netpoll_setup)(struct net_device *dev,
943 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);
1005 int (*ndo_fdb_add)(struct ndmsg *ndm,
1006 struct nlattr *tb[],
1007 struct net_device *dev,
1008 const unsigned char *addr,
1010 int (*ndo_fdb_del)(struct ndmsg *ndm,
1011 struct net_device *dev,
1012 const unsigned char *addr);
1013 int (*ndo_fdb_dump)(struct sk_buff *skb,
1014 struct netlink_callback *cb,
1015 struct net_device *dev,
1018 int (*ndo_bridge_setlink)(struct net_device *dev,
1019 struct nlmsghdr *nlh);
1020 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1022 struct net_device *dev);
1023 int (*ndo_change_carrier)(struct net_device *dev,
1028 * The DEVICE structure.
1029 * Actually, this whole structure is a big mistake. It mixes I/O
1030 * data with strictly "high-level" data, and it has to know about
1031 * almost every data structure used in the INET module.
1033 * FIXME: cleanup struct net_device such that network protocol info
1040 * This is the first field of the "visible" part of this structure
1041 * (i.e. as seen by users in the "Space.c" file). It is the name
1044 char name[IFNAMSIZ];
1046 /* device name hash chain, please keep it close to name[] */
1047 struct hlist_node name_hlist;
1053 * I/O specific fields
1054 * FIXME: Merge these and struct ifmap into one
1056 unsigned long mem_end; /* shared mem end */
1057 unsigned long mem_start; /* shared mem start */
1058 unsigned long base_addr; /* device I/O address */
1059 unsigned int irq; /* device IRQ number */
1062 * Some hardware also needs these fields, but they are not
1063 * part of the usual set specified in Space.c.
1066 unsigned long state;
1068 struct list_head dev_list;
1069 struct list_head napi_list;
1070 struct list_head unreg_list;
1072 /* currently active device features */
1073 netdev_features_t features;
1074 /* user-changeable features */
1075 netdev_features_t hw_features;
1076 /* user-requested features */
1077 netdev_features_t wanted_features;
1078 /* mask of features inheritable by VLAN devices */
1079 netdev_features_t vlan_features;
1080 /* mask of features inherited by encapsulating devices
1081 * This field indicates what encapsulation offloads
1082 * the hardware is capable of doing, and drivers will
1083 * need to set them appropriately.
1085 netdev_features_t hw_enc_features;
1087 /* Interface index. Unique device identifier */
1091 struct net_device_stats stats;
1092 atomic_long_t rx_dropped; /* dropped packets by core network
1093 * Do not use this in drivers.
1096 #ifdef CONFIG_WIRELESS_EXT
1097 /* List of functions to handle Wireless Extensions (instead of ioctl).
1098 * See <net/iw_handler.h> for details. Jean II */
1099 const struct iw_handler_def * wireless_handlers;
1100 /* Instance data managed by the core of Wireless Extensions. */
1101 struct iw_public_data * wireless_data;
1103 /* Management operations */
1104 const struct net_device_ops *netdev_ops;
1105 const struct ethtool_ops *ethtool_ops;
1107 /* Hardware header description */
1108 const struct header_ops *header_ops;
1110 unsigned int flags; /* interface flags (a la BSD) */
1111 unsigned int priv_flags; /* Like 'flags' but invisible to userspace.
1112 * See if.h for definitions. */
1113 unsigned short gflags;
1114 unsigned short padded; /* How much padding added by alloc_netdev() */
1116 unsigned char operstate; /* RFC2863 operstate */
1117 unsigned char link_mode; /* mapping policy to operstate */
1119 unsigned char if_port; /* Selectable AUI, TP,..*/
1120 unsigned char dma; /* DMA channel */
1122 unsigned int mtu; /* interface MTU value */
1123 unsigned short type; /* interface hardware type */
1124 unsigned short hard_header_len; /* hardware hdr length */
1126 /* extra head- and tailroom the hardware may need, but not in all cases
1127 * can this be guaranteed, especially tailroom. Some cases also use
1128 * LL_MAX_HEADER instead to allocate the skb.
1130 unsigned short needed_headroom;
1131 unsigned short needed_tailroom;
1133 /* Interface address info. */
1134 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1135 unsigned char addr_assign_type; /* hw address assignment type */
1136 unsigned char addr_len; /* hardware address length */
1137 unsigned char neigh_priv_len;
1138 unsigned short dev_id; /* for shared network cards */
1140 spinlock_t addr_list_lock;
1141 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1142 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1144 unsigned int promiscuity;
1145 unsigned int allmulti;
1148 /* Protocol specific pointers */
1150 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1151 struct vlan_info __rcu *vlan_info; /* VLAN info */
1153 #if IS_ENABLED(CONFIG_NET_DSA)
1154 struct dsa_switch_tree *dsa_ptr; /* dsa specific data */
1156 void *atalk_ptr; /* AppleTalk link */
1157 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1158 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1159 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1160 void *ax25_ptr; /* AX.25 specific data */
1161 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1162 assign before registering */
1165 * Cache lines mostly used on receive path (including eth_type_trans())
1167 unsigned long last_rx; /* Time of last Rx
1168 * This should not be set in
1169 * drivers, unless really needed,
1170 * because network stack (bonding)
1171 * use it if/when necessary, to
1172 * avoid dirtying this cache line.
1175 struct list_head upper_dev_list; /* List of upper devices */
1177 /* Interface address info used in eth_type_trans() */
1178 unsigned char *dev_addr; /* hw address, (before bcast
1179 because most packets are
1182 struct netdev_hw_addr_list dev_addrs; /* list of device
1185 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1188 struct kset *queues_kset;
1192 struct netdev_rx_queue *_rx;
1194 /* Number of RX queues allocated at register_netdev() time */
1195 unsigned int num_rx_queues;
1197 /* Number of RX queues currently active in device */
1198 unsigned int real_num_rx_queues;
1200 #ifdef CONFIG_RFS_ACCEL
1201 /* CPU reverse-mapping for RX completion interrupts, indexed
1202 * by RX queue number. Assigned by driver. This must only be
1203 * set if the ndo_rx_flow_steer operation is defined. */
1204 struct cpu_rmap *rx_cpu_rmap;
1208 rx_handler_func_t __rcu *rx_handler;
1209 void __rcu *rx_handler_data;
1211 struct netdev_queue __rcu *ingress_queue;
1214 * Cache lines mostly used on transmit path
1216 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1218 /* Number of TX queues allocated at alloc_netdev_mq() time */
1219 unsigned int num_tx_queues;
1221 /* Number of TX queues currently active in device */
1222 unsigned int real_num_tx_queues;
1224 /* root qdisc from userspace point of view */
1225 struct Qdisc *qdisc;
1227 unsigned long tx_queue_len; /* Max frames per queue allowed */
1228 spinlock_t tx_global_lock;
1231 struct xps_dev_maps __rcu *xps_maps;
1234 /* These may be needed for future network-power-down code. */
1237 * trans_start here is expensive for high speed devices on SMP,
1238 * please use netdev_queue->trans_start instead.
1240 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1242 int watchdog_timeo; /* used by dev_watchdog() */
1243 struct timer_list watchdog_timer;
1245 /* Number of references to this device */
1246 int __percpu *pcpu_refcnt;
1248 /* delayed register/unregister */
1249 struct list_head todo_list;
1250 /* device index hash chain */
1251 struct hlist_node index_hlist;
1253 struct list_head link_watch_list;
1255 /* register/unregister state machine */
1256 enum { NETREG_UNINITIALIZED=0,
1257 NETREG_REGISTERED, /* completed register_netdevice */
1258 NETREG_UNREGISTERING, /* called unregister_netdevice */
1259 NETREG_UNREGISTERED, /* completed unregister todo */
1260 NETREG_RELEASED, /* called free_netdev */
1261 NETREG_DUMMY, /* dummy device for NAPI poll */
1264 bool dismantle; /* device is going do be freed */
1267 RTNL_LINK_INITIALIZED,
1268 RTNL_LINK_INITIALIZING,
1269 } rtnl_link_state:16;
1271 /* Called from unregister, can be used to call free_netdev */
1272 void (*destructor)(struct net_device *dev);
1274 #ifdef CONFIG_NETPOLL
1275 struct netpoll_info __rcu *npinfo;
1278 #ifdef CONFIG_NET_NS
1279 /* Network namespace this network device is inside */
1283 /* mid-layer private */
1286 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1287 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1288 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1289 struct pcpu_vstats __percpu *vstats; /* veth stats */
1292 struct garp_port __rcu *garp_port;
1294 struct mrp_port __rcu *mrp_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);
1411 extern u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb);
1414 * Net namespace inlines
1417 struct net *dev_net(const struct net_device *dev)
1419 return read_pnet(&dev->nd_net);
1423 void dev_net_set(struct net_device *dev, struct net *net)
1425 #ifdef CONFIG_NET_NS
1426 release_net(dev->nd_net);
1427 dev->nd_net = hold_net(net);
1431 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1433 #ifdef CONFIG_NET_DSA_TAG_DSA
1434 if (dev->dsa_ptr != NULL)
1435 return dsa_uses_dsa_tags(dev->dsa_ptr);
1441 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1443 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1444 if (dev->dsa_ptr != NULL)
1445 return dsa_uses_trailer_tags(dev->dsa_ptr);
1452 * netdev_priv - access network device private data
1453 * @dev: network device
1455 * Get network device private data
1457 static inline void *netdev_priv(const struct net_device *dev)
1459 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1462 /* Set the sysfs physical device reference for the network logical device
1463 * if set prior to registration will cause a symlink during initialization.
1465 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1467 /* Set the sysfs device type for the network logical device to allow
1468 * fin grained indentification of different network device types. For
1469 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1471 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1474 * netif_napi_add - initialize a napi context
1475 * @dev: network device
1476 * @napi: napi context
1477 * @poll: polling function
1478 * @weight: default weight
1480 * netif_napi_add() must be used to initialize a napi context prior to calling
1481 * *any* of the other napi related functions.
1483 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1484 int (*poll)(struct napi_struct *, int), int weight);
1487 * netif_napi_del - remove a napi context
1488 * @napi: napi context
1490 * netif_napi_del() removes a napi context from the network device napi list
1492 void netif_napi_del(struct napi_struct *napi);
1494 struct napi_gro_cb {
1495 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1498 /* Length of frag0. */
1499 unsigned int frag0_len;
1501 /* This indicates where we are processing relative to skb->data. */
1504 /* This is non-zero if the packet cannot be merged with the new skb. */
1507 /* Number of segments aggregated. */
1510 /* This is non-zero if the packet may be of the same flow. */
1515 #define NAPI_GRO_FREE 1
1516 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1518 /* jiffies when first packet was created/queued */
1521 /* Used in ipv6_gro_receive() */
1524 /* used in skb_gro_receive() slow path */
1525 struct sk_buff *last;
1528 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1530 struct packet_type {
1531 __be16 type; /* This is really htons(ether_type). */
1532 struct net_device *dev; /* NULL is wildcarded here */
1533 int (*func) (struct sk_buff *,
1534 struct net_device *,
1535 struct packet_type *,
1536 struct net_device *);
1537 bool (*id_match)(struct packet_type *ptype,
1539 void *af_packet_priv;
1540 struct list_head list;
1543 struct offload_callbacks {
1544 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1545 netdev_features_t features);
1546 int (*gso_send_check)(struct sk_buff *skb);
1547 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1548 struct sk_buff *skb);
1549 int (*gro_complete)(struct sk_buff *skb);
1552 struct packet_offload {
1553 __be16 type; /* This is really htons(ether_type). */
1554 struct offload_callbacks callbacks;
1555 struct list_head list;
1558 #include <linux/notifier.h>
1560 /* netdevice notifier chain. Please remember to update the rtnetlink
1561 * notification exclusion list in rtnetlink_event() when adding new
1564 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1565 #define NETDEV_DOWN 0x0002
1566 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1567 detected a hardware crash and restarted
1568 - we can use this eg to kick tcp sessions
1570 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1571 #define NETDEV_REGISTER 0x0005
1572 #define NETDEV_UNREGISTER 0x0006
1573 #define NETDEV_CHANGEMTU 0x0007
1574 #define NETDEV_CHANGEADDR 0x0008
1575 #define NETDEV_GOING_DOWN 0x0009
1576 #define NETDEV_CHANGENAME 0x000A
1577 #define NETDEV_FEAT_CHANGE 0x000B
1578 #define NETDEV_BONDING_FAILOVER 0x000C
1579 #define NETDEV_PRE_UP 0x000D
1580 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1581 #define NETDEV_POST_TYPE_CHANGE 0x000F
1582 #define NETDEV_POST_INIT 0x0010
1583 #define NETDEV_UNREGISTER_FINAL 0x0011
1584 #define NETDEV_RELEASE 0x0012
1585 #define NETDEV_NOTIFY_PEERS 0x0013
1586 #define NETDEV_JOIN 0x0014
1588 extern int register_netdevice_notifier(struct notifier_block *nb);
1589 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1590 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1593 extern rwlock_t dev_base_lock; /* Device list lock */
1595 extern seqcount_t devnet_rename_seq; /* Device rename seq */
1598 #define for_each_netdev(net, d) \
1599 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1600 #define for_each_netdev_reverse(net, d) \
1601 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1602 #define for_each_netdev_rcu(net, d) \
1603 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1604 #define for_each_netdev_safe(net, d, n) \
1605 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1606 #define for_each_netdev_continue(net, d) \
1607 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1608 #define for_each_netdev_continue_rcu(net, d) \
1609 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1610 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1612 static inline struct net_device *next_net_device(struct net_device *dev)
1614 struct list_head *lh;
1618 lh = dev->dev_list.next;
1619 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1622 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1624 struct list_head *lh;
1628 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1629 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1632 static inline struct net_device *first_net_device(struct net *net)
1634 return list_empty(&net->dev_base_head) ? NULL :
1635 net_device_entry(net->dev_base_head.next);
1638 static inline struct net_device *first_net_device_rcu(struct net *net)
1640 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1642 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1645 extern int netdev_boot_setup_check(struct net_device *dev);
1646 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1647 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1648 const char *hwaddr);
1649 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1650 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1651 extern void dev_add_pack(struct packet_type *pt);
1652 extern void dev_remove_pack(struct packet_type *pt);
1653 extern void __dev_remove_pack(struct packet_type *pt);
1654 extern void dev_add_offload(struct packet_offload *po);
1655 extern void dev_remove_offload(struct packet_offload *po);
1656 extern void __dev_remove_offload(struct packet_offload *po);
1658 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1659 unsigned short mask);
1660 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1661 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1662 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1663 extern int dev_alloc_name(struct net_device *dev, const char *name);
1664 extern int dev_open(struct net_device *dev);
1665 extern int dev_close(struct net_device *dev);
1666 extern void dev_disable_lro(struct net_device *dev);
1667 extern int dev_loopback_xmit(struct sk_buff *newskb);
1668 extern int dev_queue_xmit(struct sk_buff *skb);
1669 extern int register_netdevice(struct net_device *dev);
1670 extern void unregister_netdevice_queue(struct net_device *dev,
1671 struct list_head *head);
1672 extern void unregister_netdevice_many(struct list_head *head);
1673 static inline void unregister_netdevice(struct net_device *dev)
1675 unregister_netdevice_queue(dev, NULL);
1678 extern int netdev_refcnt_read(const struct net_device *dev);
1679 extern void free_netdev(struct net_device *dev);
1680 extern void synchronize_net(void);
1681 extern int init_dummy_netdev(struct net_device *dev);
1682 extern void netdev_resync_ops(struct net_device *dev);
1684 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1685 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1686 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1687 extern int dev_restart(struct net_device *dev);
1688 #ifdef CONFIG_NETPOLL_TRAP
1689 extern int netpoll_trap(void);
1691 extern int skb_gro_receive(struct sk_buff **head,
1692 struct sk_buff *skb);
1694 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1696 return NAPI_GRO_CB(skb)->data_offset;
1699 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1701 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1704 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1706 NAPI_GRO_CB(skb)->data_offset += len;
1709 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1710 unsigned int offset)
1712 return NAPI_GRO_CB(skb)->frag0 + offset;
1715 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1717 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1720 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1721 unsigned int offset)
1723 if (!pskb_may_pull(skb, hlen))
1726 NAPI_GRO_CB(skb)->frag0 = NULL;
1727 NAPI_GRO_CB(skb)->frag0_len = 0;
1728 return skb->data + offset;
1731 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1733 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1736 static inline void *skb_gro_network_header(struct sk_buff *skb)
1738 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1739 skb_network_offset(skb);
1742 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1743 unsigned short type,
1744 const void *daddr, const void *saddr,
1747 if (!dev->header_ops || !dev->header_ops->create)
1750 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1753 static inline int dev_parse_header(const struct sk_buff *skb,
1754 unsigned char *haddr)
1756 const struct net_device *dev = skb->dev;
1758 if (!dev->header_ops || !dev->header_ops->parse)
1760 return dev->header_ops->parse(skb, haddr);
1763 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1764 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1765 static inline int unregister_gifconf(unsigned int family)
1767 return register_gifconf(family, NULL);
1771 * Incoming packets are placed on per-cpu queues
1773 struct softnet_data {
1774 struct Qdisc *output_queue;
1775 struct Qdisc **output_queue_tailp;
1776 struct list_head poll_list;
1777 struct sk_buff *completion_queue;
1778 struct sk_buff_head process_queue;
1781 unsigned int processed;
1782 unsigned int time_squeeze;
1783 unsigned int cpu_collision;
1784 unsigned int received_rps;
1787 struct softnet_data *rps_ipi_list;
1789 /* Elements below can be accessed between CPUs for RPS */
1790 struct call_single_data csd ____cacheline_aligned_in_smp;
1791 struct softnet_data *rps_ipi_next;
1793 unsigned int input_queue_head;
1794 unsigned int input_queue_tail;
1796 unsigned int dropped;
1797 struct sk_buff_head input_pkt_queue;
1798 struct napi_struct backlog;
1801 static inline void input_queue_head_incr(struct softnet_data *sd)
1804 sd->input_queue_head++;
1808 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1809 unsigned int *qtail)
1812 *qtail = ++sd->input_queue_tail;
1816 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1818 extern void __netif_schedule(struct Qdisc *q);
1820 static inline void netif_schedule_queue(struct netdev_queue *txq)
1822 if (!(txq->state & QUEUE_STATE_ANY_XOFF))
1823 __netif_schedule(txq->qdisc);
1826 static inline void netif_tx_schedule_all(struct net_device *dev)
1830 for (i = 0; i < dev->num_tx_queues; i++)
1831 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1834 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1836 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1840 * netif_start_queue - allow transmit
1841 * @dev: network device
1843 * Allow upper layers to call the device hard_start_xmit routine.
1845 static inline void netif_start_queue(struct net_device *dev)
1847 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1850 static inline void netif_tx_start_all_queues(struct net_device *dev)
1854 for (i = 0; i < dev->num_tx_queues; i++) {
1855 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1856 netif_tx_start_queue(txq);
1860 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1862 #ifdef CONFIG_NETPOLL_TRAP
1863 if (netpoll_trap()) {
1864 netif_tx_start_queue(dev_queue);
1868 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
1869 __netif_schedule(dev_queue->qdisc);
1873 * netif_wake_queue - restart transmit
1874 * @dev: network device
1876 * Allow upper layers to call the device hard_start_xmit routine.
1877 * Used for flow control when transmit resources are available.
1879 static inline void netif_wake_queue(struct net_device *dev)
1881 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1884 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1888 for (i = 0; i < dev->num_tx_queues; i++) {
1889 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1890 netif_tx_wake_queue(txq);
1894 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1896 if (WARN_ON(!dev_queue)) {
1897 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1900 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1904 * netif_stop_queue - stop transmitted packets
1905 * @dev: network device
1907 * Stop upper layers calling the device hard_start_xmit routine.
1908 * Used for flow control when transmit resources are unavailable.
1910 static inline void netif_stop_queue(struct net_device *dev)
1912 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1915 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1919 for (i = 0; i < dev->num_tx_queues; i++) {
1920 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1921 netif_tx_stop_queue(txq);
1925 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1927 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1931 * netif_queue_stopped - test if transmit queue is flowblocked
1932 * @dev: network device
1934 * Test if transmit queue on device is currently unable to send.
1936 static inline bool netif_queue_stopped(const struct net_device *dev)
1938 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1941 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
1943 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
1946 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
1948 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
1951 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
1955 dql_queued(&dev_queue->dql, bytes);
1957 if (likely(dql_avail(&dev_queue->dql) >= 0))
1960 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
1963 * The XOFF flag must be set before checking the dql_avail below,
1964 * because in netdev_tx_completed_queue we update the dql_completed
1965 * before checking the XOFF flag.
1969 /* check again in case another CPU has just made room avail */
1970 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
1971 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
1975 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
1977 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
1980 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
1981 unsigned int pkts, unsigned int bytes)
1984 if (unlikely(!bytes))
1987 dql_completed(&dev_queue->dql, bytes);
1990 * Without the memory barrier there is a small possiblity that
1991 * netdev_tx_sent_queue will miss the update and cause the queue to
1992 * be stopped forever
1996 if (dql_avail(&dev_queue->dql) < 0)
1999 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2000 netif_schedule_queue(dev_queue);
2004 static inline void netdev_completed_queue(struct net_device *dev,
2005 unsigned int pkts, unsigned int bytes)
2007 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2010 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2013 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
2018 static inline void netdev_reset_queue(struct net_device *dev_queue)
2020 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2024 * netif_running - test if up
2025 * @dev: network device
2027 * Test if the device has been brought up.
2029 static inline bool netif_running(const struct net_device *dev)
2031 return test_bit(__LINK_STATE_START, &dev->state);
2035 * Routines to manage the subqueues on a device. We only need start
2036 * stop, and a check if it's stopped. All other device management is
2037 * done at the overall netdevice level.
2038 * Also test the device if we're multiqueue.
2042 * netif_start_subqueue - allow sending packets on subqueue
2043 * @dev: network device
2044 * @queue_index: sub queue index
2046 * Start individual transmit queue of a device with multiple transmit queues.
2048 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2050 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2052 netif_tx_start_queue(txq);
2056 * netif_stop_subqueue - stop sending packets on subqueue
2057 * @dev: network device
2058 * @queue_index: sub queue index
2060 * Stop individual transmit queue of a device with multiple transmit queues.
2062 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
2064 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2065 #ifdef CONFIG_NETPOLL_TRAP
2069 netif_tx_stop_queue(txq);
2073 * netif_subqueue_stopped - test status of subqueue
2074 * @dev: network device
2075 * @queue_index: sub queue index
2077 * Check individual transmit queue of a device with multiple transmit queues.
2079 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
2082 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2084 return netif_tx_queue_stopped(txq);
2087 static inline bool netif_subqueue_stopped(const struct net_device *dev,
2088 struct sk_buff *skb)
2090 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
2094 * netif_wake_subqueue - allow sending packets on subqueue
2095 * @dev: network device
2096 * @queue_index: sub queue index
2098 * Resume individual transmit queue of a device with multiple transmit queues.
2100 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
2102 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2103 #ifdef CONFIG_NETPOLL_TRAP
2107 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
2108 __netif_schedule(txq->qdisc);
2112 extern int netif_set_xps_queue(struct net_device *dev, struct cpumask *mask,
2115 static inline int netif_set_xps_queue(struct net_device *dev,
2116 struct cpumask *mask,
2124 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2125 * as a distribution range limit for the returned value.
2127 static inline u16 skb_tx_hash(const struct net_device *dev,
2128 const struct sk_buff *skb)
2130 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2134 * netif_is_multiqueue - test if device has multiple transmit queues
2135 * @dev: network device
2137 * Check if device has multiple transmit queues
2139 static inline bool netif_is_multiqueue(const struct net_device *dev)
2141 return dev->num_tx_queues > 1;
2144 extern int netif_set_real_num_tx_queues(struct net_device *dev,
2148 extern int netif_set_real_num_rx_queues(struct net_device *dev,
2151 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2158 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
2159 const struct net_device *from_dev)
2163 err = netif_set_real_num_tx_queues(to_dev,
2164 from_dev->real_num_tx_queues);
2168 return netif_set_real_num_rx_queues(to_dev,
2169 from_dev->real_num_rx_queues);
2175 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2176 extern int netif_get_num_default_rss_queues(void);
2178 /* Use this variant when it is known for sure that it
2179 * is executing from hardware interrupt context or with hardware interrupts
2182 extern void dev_kfree_skb_irq(struct sk_buff *skb);
2184 /* Use this variant in places where it could be invoked
2185 * from either hardware interrupt or other context, with hardware interrupts
2186 * either disabled or enabled.
2188 extern void dev_kfree_skb_any(struct sk_buff *skb);
2190 extern int netif_rx(struct sk_buff *skb);
2191 extern int netif_rx_ni(struct sk_buff *skb);
2192 extern int netif_receive_skb(struct sk_buff *skb);
2193 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
2194 struct sk_buff *skb);
2195 extern void napi_gro_flush(struct napi_struct *napi, bool flush_old);
2196 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
2197 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
2199 static inline void napi_free_frags(struct napi_struct *napi)
2201 kfree_skb(napi->skb);
2205 extern int netdev_rx_handler_register(struct net_device *dev,
2206 rx_handler_func_t *rx_handler,
2207 void *rx_handler_data);
2208 extern void netdev_rx_handler_unregister(struct net_device *dev);
2210 extern bool dev_valid_name(const char *name);
2211 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2212 extern int dev_ethtool(struct net *net, struct ifreq *);
2213 extern unsigned int dev_get_flags(const struct net_device *);
2214 extern int __dev_change_flags(struct net_device *, unsigned int flags);
2215 extern int dev_change_flags(struct net_device *, unsigned int);
2216 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
2217 extern int dev_change_name(struct net_device *, const char *);
2218 extern int dev_set_alias(struct net_device *, const char *, size_t);
2219 extern int dev_change_net_namespace(struct net_device *,
2220 struct net *, const char *);
2221 extern int dev_set_mtu(struct net_device *, int);
2222 extern void dev_set_group(struct net_device *, int);
2223 extern int dev_set_mac_address(struct net_device *,
2225 extern int dev_change_carrier(struct net_device *,
2227 extern int dev_hard_start_xmit(struct sk_buff *skb,
2228 struct net_device *dev,
2229 struct netdev_queue *txq);
2230 extern int dev_forward_skb(struct net_device *dev,
2231 struct sk_buff *skb);
2233 extern int netdev_budget;
2235 /* Called by rtnetlink.c:rtnl_unlock() */
2236 extern void netdev_run_todo(void);
2239 * dev_put - release reference to device
2240 * @dev: network device
2242 * Release reference to device to allow it to be freed.
2244 static inline void dev_put(struct net_device *dev)
2246 this_cpu_dec(*dev->pcpu_refcnt);
2250 * dev_hold - get reference to device
2251 * @dev: network device
2253 * Hold reference to device to keep it from being freed.
2255 static inline void dev_hold(struct net_device *dev)
2257 this_cpu_inc(*dev->pcpu_refcnt);
2260 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2261 * and _off may be called from IRQ context, but it is caller
2262 * who is responsible for serialization of these calls.
2264 * The name carrier is inappropriate, these functions should really be
2265 * called netif_lowerlayer_*() because they represent the state of any
2266 * kind of lower layer not just hardware media.
2269 extern void linkwatch_init_dev(struct net_device *dev);
2270 extern void linkwatch_fire_event(struct net_device *dev);
2271 extern void linkwatch_forget_dev(struct net_device *dev);
2274 * netif_carrier_ok - test if carrier present
2275 * @dev: network device
2277 * Check if carrier is present on device
2279 static inline bool netif_carrier_ok(const struct net_device *dev)
2281 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2284 extern unsigned long dev_trans_start(struct net_device *dev);
2286 extern void __netdev_watchdog_up(struct net_device *dev);
2288 extern void netif_carrier_on(struct net_device *dev);
2290 extern void netif_carrier_off(struct net_device *dev);
2293 * netif_dormant_on - mark device as dormant.
2294 * @dev: network device
2296 * Mark device as dormant (as per RFC2863).
2298 * The dormant state indicates that the relevant interface is not
2299 * actually in a condition to pass packets (i.e., it is not 'up') but is
2300 * in a "pending" state, waiting for some external event. For "on-
2301 * demand" interfaces, this new state identifies the situation where the
2302 * interface is waiting for events to place it in the up state.
2305 static inline void netif_dormant_on(struct net_device *dev)
2307 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2308 linkwatch_fire_event(dev);
2312 * netif_dormant_off - set device as not dormant.
2313 * @dev: network device
2315 * Device is not in dormant state.
2317 static inline void netif_dormant_off(struct net_device *dev)
2319 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2320 linkwatch_fire_event(dev);
2324 * netif_dormant - test if carrier present
2325 * @dev: network device
2327 * Check if carrier is present on device
2329 static inline bool netif_dormant(const struct net_device *dev)
2331 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2336 * netif_oper_up - test if device is operational
2337 * @dev: network device
2339 * Check if carrier is operational
2341 static inline bool netif_oper_up(const struct net_device *dev)
2343 return (dev->operstate == IF_OPER_UP ||
2344 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2348 * netif_device_present - is device available or removed
2349 * @dev: network device
2351 * Check if device has not been removed from system.
2353 static inline bool netif_device_present(struct net_device *dev)
2355 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2358 extern void netif_device_detach(struct net_device *dev);
2360 extern void netif_device_attach(struct net_device *dev);
2363 * Network interface message level settings
2367 NETIF_MSG_DRV = 0x0001,
2368 NETIF_MSG_PROBE = 0x0002,
2369 NETIF_MSG_LINK = 0x0004,
2370 NETIF_MSG_TIMER = 0x0008,
2371 NETIF_MSG_IFDOWN = 0x0010,
2372 NETIF_MSG_IFUP = 0x0020,
2373 NETIF_MSG_RX_ERR = 0x0040,
2374 NETIF_MSG_TX_ERR = 0x0080,
2375 NETIF_MSG_TX_QUEUED = 0x0100,
2376 NETIF_MSG_INTR = 0x0200,
2377 NETIF_MSG_TX_DONE = 0x0400,
2378 NETIF_MSG_RX_STATUS = 0x0800,
2379 NETIF_MSG_PKTDATA = 0x1000,
2380 NETIF_MSG_HW = 0x2000,
2381 NETIF_MSG_WOL = 0x4000,
2384 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2385 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2386 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2387 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2388 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2389 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2390 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2391 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2392 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2393 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2394 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2395 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2396 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2397 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2398 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2400 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2403 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2404 return default_msg_enable_bits;
2405 if (debug_value == 0) /* no output */
2407 /* set low N bits */
2408 return (1 << debug_value) - 1;
2411 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2413 spin_lock(&txq->_xmit_lock);
2414 txq->xmit_lock_owner = cpu;
2417 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2419 spin_lock_bh(&txq->_xmit_lock);
2420 txq->xmit_lock_owner = smp_processor_id();
2423 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
2425 bool ok = spin_trylock(&txq->_xmit_lock);
2427 txq->xmit_lock_owner = smp_processor_id();
2431 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2433 txq->xmit_lock_owner = -1;
2434 spin_unlock(&txq->_xmit_lock);
2437 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2439 txq->xmit_lock_owner = -1;
2440 spin_unlock_bh(&txq->_xmit_lock);
2443 static inline void txq_trans_update(struct netdev_queue *txq)
2445 if (txq->xmit_lock_owner != -1)
2446 txq->trans_start = jiffies;
2450 * netif_tx_lock - grab network device transmit lock
2451 * @dev: network device
2453 * Get network device transmit lock
2455 static inline void netif_tx_lock(struct net_device *dev)
2460 spin_lock(&dev->tx_global_lock);
2461 cpu = smp_processor_id();
2462 for (i = 0; i < dev->num_tx_queues; i++) {
2463 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2465 /* We are the only thread of execution doing a
2466 * freeze, but we have to grab the _xmit_lock in
2467 * order to synchronize with threads which are in
2468 * the ->hard_start_xmit() handler and already
2469 * checked the frozen bit.
2471 __netif_tx_lock(txq, cpu);
2472 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2473 __netif_tx_unlock(txq);
2477 static inline void netif_tx_lock_bh(struct net_device *dev)
2483 static inline void netif_tx_unlock(struct net_device *dev)
2487 for (i = 0; i < dev->num_tx_queues; i++) {
2488 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2490 /* No need to grab the _xmit_lock here. If the
2491 * queue is not stopped for another reason, we
2494 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2495 netif_schedule_queue(txq);
2497 spin_unlock(&dev->tx_global_lock);
2500 static inline void netif_tx_unlock_bh(struct net_device *dev)
2502 netif_tx_unlock(dev);
2506 #define HARD_TX_LOCK(dev, txq, cpu) { \
2507 if ((dev->features & NETIF_F_LLTX) == 0) { \
2508 __netif_tx_lock(txq, cpu); \
2512 #define HARD_TX_UNLOCK(dev, txq) { \
2513 if ((dev->features & NETIF_F_LLTX) == 0) { \
2514 __netif_tx_unlock(txq); \
2518 static inline void netif_tx_disable(struct net_device *dev)
2524 cpu = smp_processor_id();
2525 for (i = 0; i < dev->num_tx_queues; i++) {
2526 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2528 __netif_tx_lock(txq, cpu);
2529 netif_tx_stop_queue(txq);
2530 __netif_tx_unlock(txq);
2535 static inline void netif_addr_lock(struct net_device *dev)
2537 spin_lock(&dev->addr_list_lock);
2540 static inline void netif_addr_lock_nested(struct net_device *dev)
2542 spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING);
2545 static inline void netif_addr_lock_bh(struct net_device *dev)
2547 spin_lock_bh(&dev->addr_list_lock);
2550 static inline void netif_addr_unlock(struct net_device *dev)
2552 spin_unlock(&dev->addr_list_lock);
2555 static inline void netif_addr_unlock_bh(struct net_device *dev)
2557 spin_unlock_bh(&dev->addr_list_lock);
2561 * dev_addrs walker. Should be used only for read access. Call with
2562 * rcu_read_lock held.
2564 #define for_each_dev_addr(dev, ha) \
2565 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2567 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2569 extern void ether_setup(struct net_device *dev);
2571 /* Support for loadable net-drivers */
2572 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2573 void (*setup)(struct net_device *),
2574 unsigned int txqs, unsigned int rxqs);
2575 #define alloc_netdev(sizeof_priv, name, setup) \
2576 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2578 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2579 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2581 extern int register_netdev(struct net_device *dev);
2582 extern void unregister_netdev(struct net_device *dev);
2584 /* General hardware address lists handling functions */
2585 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2586 struct netdev_hw_addr_list *from_list,
2587 int addr_len, unsigned char addr_type);
2588 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2589 struct netdev_hw_addr_list *from_list,
2590 int addr_len, unsigned char addr_type);
2591 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2592 struct netdev_hw_addr_list *from_list,
2594 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2595 struct netdev_hw_addr_list *from_list,
2597 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2598 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2600 /* Functions used for device addresses handling */
2601 extern int dev_addr_add(struct net_device *dev, const unsigned char *addr,
2602 unsigned char addr_type);
2603 extern int dev_addr_del(struct net_device *dev, const unsigned char *addr,
2604 unsigned char addr_type);
2605 extern int dev_addr_add_multiple(struct net_device *to_dev,
2606 struct net_device *from_dev,
2607 unsigned char addr_type);
2608 extern int dev_addr_del_multiple(struct net_device *to_dev,
2609 struct net_device *from_dev,
2610 unsigned char addr_type);
2611 extern void dev_addr_flush(struct net_device *dev);
2612 extern int dev_addr_init(struct net_device *dev);
2614 /* Functions used for unicast addresses handling */
2615 extern int dev_uc_add(struct net_device *dev, const unsigned char *addr);
2616 extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
2617 extern int dev_uc_del(struct net_device *dev, const unsigned char *addr);
2618 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2619 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2620 extern void dev_uc_flush(struct net_device *dev);
2621 extern void dev_uc_init(struct net_device *dev);
2623 /* Functions used for multicast addresses handling */
2624 extern int dev_mc_add(struct net_device *dev, const unsigned char *addr);
2625 extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
2626 extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
2627 extern int dev_mc_del(struct net_device *dev, const unsigned char *addr);
2628 extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
2629 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2630 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2631 extern void dev_mc_flush(struct net_device *dev);
2632 extern void dev_mc_init(struct net_device *dev);
2634 /* Functions used for secondary unicast and multicast support */
2635 extern void dev_set_rx_mode(struct net_device *dev);
2636 extern void __dev_set_rx_mode(struct net_device *dev);
2637 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2638 extern int dev_set_allmulti(struct net_device *dev, int inc);
2639 extern void netdev_state_change(struct net_device *dev);
2640 extern void netdev_notify_peers(struct net_device *dev);
2641 extern void netdev_features_change(struct net_device *dev);
2642 /* Load a device via the kmod */
2643 extern void dev_load(struct net *net, const char *name);
2644 extern void dev_mcast_init(void);
2645 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2646 struct rtnl_link_stats64 *storage);
2647 extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
2648 const struct net_device_stats *netdev_stats);
2650 extern int netdev_max_backlog;
2651 extern int netdev_tstamp_prequeue;
2652 extern int weight_p;
2653 extern int bpf_jit_enable;
2655 extern bool netdev_has_upper_dev(struct net_device *dev,
2656 struct net_device *upper_dev);
2657 extern bool netdev_has_any_upper_dev(struct net_device *dev);
2658 extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
2659 extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
2660 extern int netdev_upper_dev_link(struct net_device *dev,
2661 struct net_device *upper_dev);
2662 extern int netdev_master_upper_dev_link(struct net_device *dev,
2663 struct net_device *upper_dev);
2664 extern void netdev_upper_dev_unlink(struct net_device *dev,
2665 struct net_device *upper_dev);
2666 extern int skb_checksum_help(struct sk_buff *skb);
2667 extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
2668 netdev_features_t features, bool tx_path);
2671 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
2673 return __skb_gso_segment(skb, features, true);
2677 extern void netdev_rx_csum_fault(struct net_device *dev);
2679 static inline void netdev_rx_csum_fault(struct net_device *dev)
2683 /* rx skb timestamps */
2684 extern void net_enable_timestamp(void);
2685 extern void net_disable_timestamp(void);
2687 #ifdef CONFIG_PROC_FS
2688 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2689 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2690 extern void dev_seq_stop(struct seq_file *seq, void *v);
2693 extern int netdev_class_create_file(struct class_attribute *class_attr);
2694 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2696 extern struct kobj_ns_type_operations net_ns_type_operations;
2698 extern const char *netdev_drivername(const struct net_device *dev);
2700 extern void linkwatch_run_queue(void);
2702 static inline netdev_features_t netdev_get_wanted_features(
2703 struct net_device *dev)
2705 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2707 netdev_features_t netdev_increment_features(netdev_features_t all,
2708 netdev_features_t one, netdev_features_t mask);
2709 int __netdev_update_features(struct net_device *dev);
2710 void netdev_update_features(struct net_device *dev);
2711 void netdev_change_features(struct net_device *dev);
2713 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2714 struct net_device *dev);
2716 netdev_features_t netif_skb_features(struct sk_buff *skb);
2718 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
2720 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
2722 /* check flags correspondence */
2723 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
2724 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
2725 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
2726 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
2727 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
2728 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
2730 return (features & feature) == feature;
2733 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
2735 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2736 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2739 static inline bool netif_needs_gso(struct sk_buff *skb,
2740 netdev_features_t features)
2742 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2743 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
2744 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
2747 static inline void netif_set_gso_max_size(struct net_device *dev,
2750 dev->gso_max_size = size;
2753 static inline bool netif_is_bond_slave(struct net_device *dev)
2755 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2758 static inline bool netif_supports_nofcs(struct net_device *dev)
2760 return dev->priv_flags & IFF_SUPP_NOFCS;
2763 extern struct pernet_operations __net_initdata loopback_net_ops;
2765 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2767 /* netdev_printk helpers, similar to dev_printk */
2769 static inline const char *netdev_name(const struct net_device *dev)
2771 if (dev->reg_state != NETREG_REGISTERED)
2772 return "(unregistered net_device)";
2776 extern __printf(3, 4)
2777 int netdev_printk(const char *level, const struct net_device *dev,
2778 const char *format, ...);
2779 extern __printf(2, 3)
2780 int netdev_emerg(const struct net_device *dev, const char *format, ...);
2781 extern __printf(2, 3)
2782 int netdev_alert(const struct net_device *dev, const char *format, ...);
2783 extern __printf(2, 3)
2784 int netdev_crit(const struct net_device *dev, const char *format, ...);
2785 extern __printf(2, 3)
2786 int netdev_err(const struct net_device *dev, const char *format, ...);
2787 extern __printf(2, 3)
2788 int netdev_warn(const struct net_device *dev, const char *format, ...);
2789 extern __printf(2, 3)
2790 int netdev_notice(const struct net_device *dev, const char *format, ...);
2791 extern __printf(2, 3)
2792 int netdev_info(const struct net_device *dev, const char *format, ...);
2794 #define MODULE_ALIAS_NETDEV(device) \
2795 MODULE_ALIAS("netdev-" device)
2797 #if defined(CONFIG_DYNAMIC_DEBUG)
2798 #define netdev_dbg(__dev, format, args...) \
2800 dynamic_netdev_dbg(__dev, format, ##args); \
2802 #elif defined(DEBUG)
2803 #define netdev_dbg(__dev, format, args...) \
2804 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2806 #define netdev_dbg(__dev, format, args...) \
2809 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2814 #if defined(VERBOSE_DEBUG)
2815 #define netdev_vdbg netdev_dbg
2818 #define netdev_vdbg(dev, format, args...) \
2821 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2827 * netdev_WARN() acts like dev_printk(), but with the key difference
2828 * of using a WARN/WARN_ON to get the message out, including the
2829 * file/line information and a backtrace.
2831 #define netdev_WARN(dev, format, args...) \
2832 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2834 /* netif printk helpers, similar to netdev_printk */
2836 #define netif_printk(priv, type, level, dev, fmt, args...) \
2838 if (netif_msg_##type(priv)) \
2839 netdev_printk(level, (dev), fmt, ##args); \
2842 #define netif_level(level, priv, type, dev, fmt, args...) \
2844 if (netif_msg_##type(priv)) \
2845 netdev_##level(dev, fmt, ##args); \
2848 #define netif_emerg(priv, type, dev, fmt, args...) \
2849 netif_level(emerg, priv, type, dev, fmt, ##args)
2850 #define netif_alert(priv, type, dev, fmt, args...) \
2851 netif_level(alert, priv, type, dev, fmt, ##args)
2852 #define netif_crit(priv, type, dev, fmt, args...) \
2853 netif_level(crit, priv, type, dev, fmt, ##args)
2854 #define netif_err(priv, type, dev, fmt, args...) \
2855 netif_level(err, priv, type, dev, fmt, ##args)
2856 #define netif_warn(priv, type, dev, fmt, args...) \
2857 netif_level(warn, priv, type, dev, fmt, ##args)
2858 #define netif_notice(priv, type, dev, fmt, args...) \
2859 netif_level(notice, priv, type, dev, fmt, ##args)
2860 #define netif_info(priv, type, dev, fmt, args...) \
2861 netif_level(info, priv, type, dev, fmt, ##args)
2863 #if defined(CONFIG_DYNAMIC_DEBUG)
2864 #define netif_dbg(priv, type, netdev, format, args...) \
2866 if (netif_msg_##type(priv)) \
2867 dynamic_netdev_dbg(netdev, format, ##args); \
2869 #elif defined(DEBUG)
2870 #define netif_dbg(priv, type, dev, format, args...) \
2871 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2873 #define netif_dbg(priv, type, dev, format, args...) \
2876 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2881 #if defined(VERBOSE_DEBUG)
2882 #define netif_vdbg netif_dbg
2884 #define netif_vdbg(priv, type, dev, format, args...) \
2887 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2892 #endif /* _LINUX_NETDEVICE_H */