2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31 #include <linux/if_link.h>
34 #include <linux/pm_qos.h>
35 #include <linux/timer.h>
36 #include <linux/bug.h>
37 #include <linux/delay.h>
38 #include <linux/atomic.h>
39 #include <asm/cache.h>
40 #include <asm/byteorder.h>
42 #include <linux/percpu.h>
43 #include <linux/rculist.h>
44 #include <linux/dmaengine.h>
45 #include <linux/workqueue.h>
46 #include <linux/dynamic_queue_limits.h>
48 #include <linux/ethtool.h>
49 #include <net/net_namespace.h>
52 #include <net/dcbnl.h>
54 #include <net/netprio_cgroup.h>
56 #include <linux/netdev_features.h>
57 #include <linux/neighbour.h>
64 /* source back-compat hooks */
65 #define SET_ETHTOOL_OPS(netdev,ops) \
66 ( (netdev)->ethtool_ops = (ops) )
68 /* hardware address assignment types */
69 #define NET_ADDR_PERM 0 /* address is permanent (default) */
70 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
71 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
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
))
138 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
140 /* Initial net device group. All devices belong to group 0 by default. */
141 #define INIT_NETDEV_GROUP 0
145 * Compute the worst case header length according to the protocols
149 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
150 # if defined(CONFIG_MAC80211_MESH)
151 # define LL_MAX_HEADER 128
153 # define LL_MAX_HEADER 96
155 #elif IS_ENABLED(CONFIG_TR)
156 # define LL_MAX_HEADER 48
158 # define LL_MAX_HEADER 32
161 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
162 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
163 #define MAX_HEADER LL_MAX_HEADER
165 #define MAX_HEADER (LL_MAX_HEADER + 48)
169 * Old network device statistics. Fields are native words
170 * (unsigned long) so they can be read and written atomically.
173 struct net_device_stats
{
174 unsigned long rx_packets
;
175 unsigned long tx_packets
;
176 unsigned long rx_bytes
;
177 unsigned long tx_bytes
;
178 unsigned long rx_errors
;
179 unsigned long tx_errors
;
180 unsigned long rx_dropped
;
181 unsigned long tx_dropped
;
182 unsigned long multicast
;
183 unsigned long collisions
;
184 unsigned long rx_length_errors
;
185 unsigned long rx_over_errors
;
186 unsigned long rx_crc_errors
;
187 unsigned long rx_frame_errors
;
188 unsigned long rx_fifo_errors
;
189 unsigned long rx_missed_errors
;
190 unsigned long tx_aborted_errors
;
191 unsigned long tx_carrier_errors
;
192 unsigned long tx_fifo_errors
;
193 unsigned long tx_heartbeat_errors
;
194 unsigned long tx_window_errors
;
195 unsigned long rx_compressed
;
196 unsigned long tx_compressed
;
199 #endif /* __KERNEL__ */
202 /* Media selection options. */
215 #include <linux/cache.h>
216 #include <linux/skbuff.h>
219 #include <linux/static_key.h>
220 extern struct static_key rps_needed
;
227 struct netdev_hw_addr
{
228 struct list_head list
;
229 unsigned char addr
[MAX_ADDR_LEN
];
231 #define NETDEV_HW_ADDR_T_LAN 1
232 #define NETDEV_HW_ADDR_T_SAN 2
233 #define NETDEV_HW_ADDR_T_SLAVE 3
234 #define NETDEV_HW_ADDR_T_UNICAST 4
235 #define NETDEV_HW_ADDR_T_MULTICAST 5
239 struct rcu_head rcu_head
;
242 struct netdev_hw_addr_list
{
243 struct list_head list
;
247 #define netdev_hw_addr_list_count(l) ((l)->count)
248 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
249 #define netdev_hw_addr_list_for_each(ha, l) \
250 list_for_each_entry(ha, &(l)->list, list)
252 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
253 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
254 #define netdev_for_each_uc_addr(ha, dev) \
255 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
257 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
258 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
259 #define netdev_for_each_mc_addr(ha, dev) \
260 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
267 /* cached hardware header; allow for machine alignment needs. */
268 #define HH_DATA_MOD 16
269 #define HH_DATA_OFF(__len) \
270 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
271 #define HH_DATA_ALIGN(__len) \
272 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
273 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
276 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
278 * dev->hard_header_len ? (dev->hard_header_len +
279 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
281 * We could use other alignment values, but we must maintain the
282 * relationship HH alignment <= LL alignment.
284 #define LL_RESERVED_SPACE(dev) \
285 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
286 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
287 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
290 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
291 unsigned short type
, const void *daddr
,
292 const void *saddr
, unsigned int len
);
293 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
294 int (*rebuild
)(struct sk_buff
*skb
);
295 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
296 void (*cache_update
)(struct hh_cache
*hh
,
297 const struct net_device
*dev
,
298 const unsigned char *haddr
);
301 /* These flag bits are private to the generic network queueing
302 * layer, they may not be explicitly referenced by any other
306 enum netdev_state_t
{
308 __LINK_STATE_PRESENT
,
309 __LINK_STATE_NOCARRIER
,
310 __LINK_STATE_LINKWATCH_PENDING
,
311 __LINK_STATE_DORMANT
,
316 * This structure holds at boot time configured netdevice settings. They
317 * are then used in the device probing.
319 struct netdev_boot_setup
{
323 #define NETDEV_BOOT_SETUP_MAX 8
325 extern int __init
netdev_boot_setup(char *str
);
328 * Structure for NAPI scheduling similar to tasklet but with weighting
331 /* The poll_list must only be managed by the entity which
332 * changes the state of the NAPI_STATE_SCHED bit. This means
333 * whoever atomically sets that bit can add this napi_struct
334 * to the per-cpu poll_list, and whoever clears that bit
335 * can remove from the list right before clearing the bit.
337 struct list_head poll_list
;
341 unsigned int gro_count
;
342 int (*poll
)(struct napi_struct
*, int);
343 #ifdef CONFIG_NETPOLL
344 spinlock_t poll_lock
;
347 struct net_device
*dev
;
348 struct sk_buff
*gro_list
;
350 struct list_head dev_list
;
354 NAPI_STATE_SCHED
, /* Poll is scheduled */
355 NAPI_STATE_DISABLE
, /* Disable pending */
356 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
366 typedef enum gro_result gro_result_t
;
369 * enum rx_handler_result - Possible return values for rx_handlers.
370 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
372 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
373 * case skb->dev was changed by rx_handler.
374 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
375 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
377 * rx_handlers are functions called from inside __netif_receive_skb(), to do
378 * special processing of the skb, prior to delivery to protocol handlers.
380 * Currently, a net_device can only have a single rx_handler registered. Trying
381 * to register a second rx_handler will return -EBUSY.
383 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
384 * To unregister a rx_handler on a net_device, use
385 * netdev_rx_handler_unregister().
387 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
390 * If the rx_handler consumed to skb in some way, it should return
391 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
392 * the skb to be delivered in some other ways.
394 * If the rx_handler changed skb->dev, to divert the skb to another
395 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
396 * new device will be called if it exists.
398 * If the rx_handler consider the skb should be ignored, it should return
399 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
400 * are registred on exact device (ptype->dev == skb->dev).
402 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
403 * delivered, it should return RX_HANDLER_PASS.
405 * A device without a registered rx_handler will behave as if rx_handler
406 * returned RX_HANDLER_PASS.
409 enum rx_handler_result
{
415 typedef enum rx_handler_result rx_handler_result_t
;
416 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
418 extern void __napi_schedule(struct napi_struct
*n
);
420 static inline bool napi_disable_pending(struct napi_struct
*n
)
422 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
426 * napi_schedule_prep - check if napi can be scheduled
429 * Test if NAPI routine is already running, and if not mark
430 * it as running. This is used as a condition variable
431 * insure only one NAPI poll instance runs. We also make
432 * sure there is no pending NAPI disable.
434 static inline bool napi_schedule_prep(struct napi_struct
*n
)
436 return !napi_disable_pending(n
) &&
437 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
441 * napi_schedule - schedule NAPI poll
444 * Schedule NAPI poll routine to be called if it is not already
447 static inline void napi_schedule(struct napi_struct
*n
)
449 if (napi_schedule_prep(n
))
453 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
454 static inline bool napi_reschedule(struct napi_struct
*napi
)
456 if (napi_schedule_prep(napi
)) {
457 __napi_schedule(napi
);
464 * napi_complete - NAPI processing complete
467 * Mark NAPI processing as complete.
469 extern void __napi_complete(struct napi_struct
*n
);
470 extern void napi_complete(struct napi_struct
*n
);
473 * napi_disable - prevent NAPI from scheduling
476 * Stop NAPI from being scheduled on this context.
477 * Waits till any outstanding processing completes.
479 static inline void napi_disable(struct napi_struct
*n
)
481 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
482 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
484 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
488 * napi_enable - enable NAPI scheduling
491 * Resume NAPI from being scheduled on this context.
492 * Must be paired with napi_disable.
494 static inline void napi_enable(struct napi_struct
*n
)
496 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
497 smp_mb__before_clear_bit();
498 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
503 * napi_synchronize - wait until NAPI is not running
506 * Wait until NAPI is done being scheduled on this context.
507 * Waits till any outstanding processing completes but
508 * does not disable future activations.
510 static inline void napi_synchronize(const struct napi_struct
*n
)
512 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
516 # define napi_synchronize(n) barrier()
519 enum netdev_queue_state_t
{
520 __QUEUE_STATE_DRV_XOFF
,
521 __QUEUE_STATE_STACK_XOFF
,
522 __QUEUE_STATE_FROZEN
,
523 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
524 (1 << __QUEUE_STATE_STACK_XOFF))
525 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
526 (1 << __QUEUE_STATE_FROZEN))
529 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
530 * netif_tx_* functions below are used to manipulate this flag. The
531 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
532 * queue independently. The netif_xmit_*stopped functions below are called
533 * to check if the queue has been stopped by the driver or stack (either
534 * of the XOFF bits are set in the state). Drivers should not need to call
535 * netif_xmit*stopped functions, they should only be using netif_tx_*.
538 struct netdev_queue
{
542 struct net_device
*dev
;
544 struct Qdisc
*qdisc_sleeping
;
548 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
554 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
557 * please use this field instead of dev->trans_start
559 unsigned long trans_start
;
562 * Number of TX timeouts for this queue
563 * (/sys/class/net/DEV/Q/trans_timeout)
565 unsigned long trans_timeout
;
572 } ____cacheline_aligned_in_smp
;
574 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
576 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
583 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
585 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
592 * This structure holds an RPS map which can be of variable length. The
593 * map is an array of CPUs.
600 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
603 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
604 * tail pointer for that CPU's input queue at the time of last enqueue, and
605 * a hardware filter index.
607 struct rps_dev_flow
{
610 unsigned int last_qtail
;
612 #define RPS_NO_FILTER 0xffff
615 * The rps_dev_flow_table structure contains a table of flow mappings.
617 struct rps_dev_flow_table
{
620 struct work_struct free_work
;
621 struct rps_dev_flow flows
[0];
623 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
624 ((_num) * sizeof(struct rps_dev_flow)))
627 * The rps_sock_flow_table contains mappings of flows to the last CPU
628 * on which they were processed by the application (set in recvmsg).
630 struct rps_sock_flow_table
{
634 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
635 ((_num) * sizeof(u16)))
637 #define RPS_NO_CPU 0xffff
639 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
643 unsigned int cpu
, index
= hash
& table
->mask
;
645 /* We only give a hint, preemption can change cpu under us */
646 cpu
= raw_smp_processor_id();
648 if (table
->ents
[index
] != cpu
)
649 table
->ents
[index
] = cpu
;
653 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
657 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
660 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
662 #ifdef CONFIG_RFS_ACCEL
663 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
664 u32 flow_id
, u16 filter_id
);
667 /* This structure contains an instance of an RX queue. */
668 struct netdev_rx_queue
{
669 struct rps_map __rcu
*rps_map
;
670 struct rps_dev_flow_table __rcu
*rps_flow_table
;
672 struct net_device
*dev
;
673 } ____cacheline_aligned_in_smp
;
674 #endif /* CONFIG_RPS */
678 * This structure holds an XPS map which can be of variable length. The
679 * map is an array of queues.
683 unsigned int alloc_len
;
687 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
688 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
692 * This structure holds all XPS maps for device. Maps are indexed by CPU.
694 struct xps_dev_maps
{
696 struct xps_map __rcu
*cpu_map
[0];
698 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
699 (nr_cpu_ids * sizeof(struct xps_map *)))
700 #endif /* CONFIG_XPS */
702 #define TC_MAX_QUEUE 16
703 #define TC_BITMASK 15
704 /* HW offloaded queuing disciplines txq count and offset maps */
705 struct netdev_tc_txq
{
710 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
712 * This structure is to hold information about the device
713 * configured to run FCoE protocol stack.
715 struct netdev_fcoe_hbainfo
{
716 char manufacturer
[64];
717 char serial_number
[64];
718 char hardware_version
[64];
719 char driver_version
[64];
720 char optionrom_version
[64];
721 char firmware_version
[64];
723 char model_description
[256];
728 * This structure defines the management hooks for network devices.
729 * The following hooks can be defined; unless noted otherwise, they are
730 * optional and can be filled with a null pointer.
732 * int (*ndo_init)(struct net_device *dev);
733 * This function is called once when network device is registered.
734 * The network device can use this to any late stage initializaton
735 * or semantic validattion. It can fail with an error code which will
736 * be propogated back to register_netdev
738 * void (*ndo_uninit)(struct net_device *dev);
739 * This function is called when device is unregistered or when registration
740 * fails. It is not called if init fails.
742 * int (*ndo_open)(struct net_device *dev);
743 * This function is called when network device transistions to the up
746 * int (*ndo_stop)(struct net_device *dev);
747 * This function is called when network device transistions to the down
750 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
751 * struct net_device *dev);
752 * Called when a packet needs to be transmitted.
753 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
754 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
755 * Required can not be NULL.
757 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
758 * Called to decide which queue to when device supports multiple
761 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
762 * This function is called to allow device receiver to make
763 * changes to configuration when multicast or promiscious is enabled.
765 * void (*ndo_set_rx_mode)(struct net_device *dev);
766 * This function is called device changes address list filtering.
767 * If driver handles unicast address filtering, it should set
768 * IFF_UNICAST_FLT to its priv_flags.
770 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
771 * This function is called when the Media Access Control address
772 * needs to be changed. If this interface is not defined, the
773 * mac address can not be changed.
775 * int (*ndo_validate_addr)(struct net_device *dev);
776 * Test if Media Access Control address is valid for the device.
778 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
779 * Called when a user request an ioctl which can't be handled by
780 * the generic interface code. If not defined ioctl's return
781 * not supported error code.
783 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
784 * Used to set network devices bus interface parameters. This interface
785 * is retained for legacy reason, new devices should use the bus
786 * interface (PCI) for low level management.
788 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
789 * Called when a user wants to change the Maximum Transfer Unit
790 * of a device. If not defined, any request to change MTU will
791 * will return an error.
793 * void (*ndo_tx_timeout)(struct net_device *dev);
794 * Callback uses when the transmitter has not made any progress
795 * for dev->watchdog ticks.
797 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
798 * struct rtnl_link_stats64 *storage);
799 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
800 * Called when a user wants to get the network device usage
801 * statistics. Drivers must do one of the following:
802 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
803 * rtnl_link_stats64 structure passed by the caller.
804 * 2. Define @ndo_get_stats to update a net_device_stats structure
805 * (which should normally be dev->stats) and return a pointer to
806 * it. The structure may be changed asynchronously only if each
807 * field is written atomically.
808 * 3. Update dev->stats asynchronously and atomically, and define
811 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
812 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
813 * this function is called when a VLAN id is registered.
815 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
816 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
817 * this function is called when a VLAN id is unregistered.
819 * void (*ndo_poll_controller)(struct net_device *dev);
821 * SR-IOV management functions.
822 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
823 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
824 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
825 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
826 * int (*ndo_get_vf_config)(struct net_device *dev,
827 * int vf, struct ifla_vf_info *ivf);
828 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
829 * struct nlattr *port[]);
830 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
831 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
832 * Called to setup 'tc' number of traffic classes in the net device. This
833 * is always called from the stack with the rtnl lock held and netif tx
834 * queues stopped. This allows the netdevice to perform queue management
837 * Fiber Channel over Ethernet (FCoE) offload functions.
838 * int (*ndo_fcoe_enable)(struct net_device *dev);
839 * Called when the FCoE protocol stack wants to start using LLD for FCoE
840 * so the underlying device can perform whatever needed configuration or
841 * initialization to support acceleration of FCoE traffic.
843 * int (*ndo_fcoe_disable)(struct net_device *dev);
844 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
845 * so the underlying device can perform whatever needed clean-ups to
846 * stop supporting acceleration of FCoE traffic.
848 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
849 * struct scatterlist *sgl, unsigned int sgc);
850 * Called when the FCoE Initiator wants to initialize an I/O that
851 * is a possible candidate for Direct Data Placement (DDP). The LLD can
852 * perform necessary setup and returns 1 to indicate the device is set up
853 * successfully to perform DDP on this I/O, otherwise this returns 0.
855 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
856 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
857 * indicated by the FC exchange id 'xid', so the underlying device can
858 * clean up and reuse resources for later DDP requests.
860 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
861 * struct scatterlist *sgl, unsigned int sgc);
862 * Called when the FCoE Target wants to initialize an I/O that
863 * is a possible candidate for Direct Data Placement (DDP). The LLD can
864 * perform necessary setup and returns 1 to indicate the device is set up
865 * successfully to perform DDP on this I/O, otherwise this returns 0.
867 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
868 * struct netdev_fcoe_hbainfo *hbainfo);
869 * Called when the FCoE Protocol stack wants information on the underlying
870 * device. This information is utilized by the FCoE protocol stack to
871 * register attributes with Fiber Channel management service as per the
872 * FC-GS Fabric Device Management Information(FDMI) specification.
874 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
875 * Called when the underlying device wants to override default World Wide
876 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
877 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
878 * protocol stack to use.
881 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
882 * u16 rxq_index, u32 flow_id);
883 * Set hardware filter for RFS. rxq_index is the target queue index;
884 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
885 * Return the filter ID on success, or a negative error code.
887 * Slave management functions (for bridge, bonding, etc). User should
888 * call netdev_set_master() to set dev->master properly.
889 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
890 * Called to make another netdev an underling.
892 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
893 * Called to release previously enslaved netdev.
895 * Feature/offload setting functions.
896 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
897 * netdev_features_t features);
898 * Adjusts the requested feature flags according to device-specific
899 * constraints, and returns the resulting flags. Must not modify
902 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
903 * Called to update device configuration to new features. Passed
904 * feature set might be less than what was returned by ndo_fix_features()).
905 * Must return >0 or -errno if it changed dev->features itself.
907 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
908 * struct net_device *dev,
909 * const unsigned char *addr, u16 flags)
910 * Adds an FDB entry to dev for addr.
911 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev,
912 * const unsigned char *addr)
913 * Deletes the FDB entry from dev coresponding to addr.
914 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
915 * struct net_device *dev, int idx)
916 * Used to add FDB entries to dump requests. Implementers should add
917 * entries to skb and update idx with the number of entries.
919 struct net_device_ops
{
920 int (*ndo_init
)(struct net_device
*dev
);
921 void (*ndo_uninit
)(struct net_device
*dev
);
922 int (*ndo_open
)(struct net_device
*dev
);
923 int (*ndo_stop
)(struct net_device
*dev
);
924 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
925 struct net_device
*dev
);
926 u16 (*ndo_select_queue
)(struct net_device
*dev
,
927 struct sk_buff
*skb
);
928 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
930 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
931 int (*ndo_set_mac_address
)(struct net_device
*dev
,
933 int (*ndo_validate_addr
)(struct net_device
*dev
);
934 int (*ndo_do_ioctl
)(struct net_device
*dev
,
935 struct ifreq
*ifr
, int cmd
);
936 int (*ndo_set_config
)(struct net_device
*dev
,
938 int (*ndo_change_mtu
)(struct net_device
*dev
,
940 int (*ndo_neigh_setup
)(struct net_device
*dev
,
941 struct neigh_parms
*);
942 void (*ndo_tx_timeout
) (struct net_device
*dev
);
944 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
945 struct rtnl_link_stats64
*storage
);
946 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
948 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
950 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
952 #ifdef CONFIG_NET_POLL_CONTROLLER
953 void (*ndo_poll_controller
)(struct net_device
*dev
);
954 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
955 struct netpoll_info
*info
,
957 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
959 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
961 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
962 int queue
, u16 vlan
, u8 qos
);
963 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
965 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
966 int vf
, bool setting
);
967 int (*ndo_get_vf_config
)(struct net_device
*dev
,
969 struct ifla_vf_info
*ivf
);
970 int (*ndo_set_vf_port
)(struct net_device
*dev
,
972 struct nlattr
*port
[]);
973 int (*ndo_get_vf_port
)(struct net_device
*dev
,
974 int vf
, struct sk_buff
*skb
);
975 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
976 #if IS_ENABLED(CONFIG_FCOE)
977 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
978 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
979 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
981 struct scatterlist
*sgl
,
983 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
985 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
987 struct scatterlist
*sgl
,
989 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
990 struct netdev_fcoe_hbainfo
*hbainfo
);
993 #if IS_ENABLED(CONFIG_LIBFCOE)
994 #define NETDEV_FCOE_WWNN 0
995 #define NETDEV_FCOE_WWPN 1
996 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1000 #ifdef CONFIG_RFS_ACCEL
1001 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1002 const struct sk_buff
*skb
,
1006 int (*ndo_add_slave
)(struct net_device
*dev
,
1007 struct net_device
*slave_dev
);
1008 int (*ndo_del_slave
)(struct net_device
*dev
,
1009 struct net_device
*slave_dev
);
1010 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1011 netdev_features_t features
);
1012 int (*ndo_set_features
)(struct net_device
*dev
,
1013 netdev_features_t features
);
1014 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1015 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1017 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1018 struct nlattr
*tb
[],
1019 struct net_device
*dev
,
1020 const unsigned char *addr
,
1022 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1023 struct net_device
*dev
,
1024 const unsigned char *addr
);
1025 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1026 struct netlink_callback
*cb
,
1027 struct net_device
*dev
,
1032 * The DEVICE structure.
1033 * Actually, this whole structure is a big mistake. It mixes I/O
1034 * data with strictly "high-level" data, and it has to know about
1035 * almost every data structure used in the INET module.
1037 * FIXME: cleanup struct net_device such that network protocol info
1044 * This is the first field of the "visible" part of this structure
1045 * (i.e. as seen by users in the "Space.c" file). It is the name
1048 char name
[IFNAMSIZ
];
1050 /* device name hash chain, please keep it close to name[] */
1051 struct hlist_node name_hlist
;
1057 * I/O specific fields
1058 * FIXME: Merge these and struct ifmap into one
1060 unsigned long mem_end
; /* shared mem end */
1061 unsigned long mem_start
; /* shared mem start */
1062 unsigned long base_addr
; /* device I/O address */
1063 unsigned int irq
; /* device IRQ number */
1066 * Some hardware also needs these fields, but they are not
1067 * part of the usual set specified in Space.c.
1070 unsigned long state
;
1072 struct list_head dev_list
;
1073 struct list_head napi_list
;
1074 struct list_head unreg_list
;
1076 /* currently active device features */
1077 netdev_features_t features
;
1078 /* user-changeable features */
1079 netdev_features_t hw_features
;
1080 /* user-requested features */
1081 netdev_features_t wanted_features
;
1082 /* mask of features inheritable by VLAN devices */
1083 netdev_features_t vlan_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 /* 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
*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 */
1291 struct garp_port __rcu
*garp_port
;
1293 /* class/net/name entry */
1295 /* space for optional device, statistics, and wireless sysfs groups */
1296 const struct attribute_group
*sysfs_groups
[4];
1298 /* rtnetlink link ops */
1299 const struct rtnl_link_ops
*rtnl_link_ops
;
1301 /* for setting kernel sock attribute on TCP connection setup */
1302 #define GSO_MAX_SIZE 65536
1303 unsigned int gso_max_size
;
1304 #define GSO_MAX_SEGS 65535
1308 /* Data Center Bridging netlink ops */
1309 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1312 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1313 u8 prio_tc_map
[TC_BITMASK
+ 1];
1315 #if IS_ENABLED(CONFIG_FCOE)
1316 /* max exchange id for FCoE LRO by ddp */
1317 unsigned int fcoe_ddp_xid
;
1319 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1320 struct netprio_map __rcu
*priomap
;
1322 /* phy device may attach itself for hardware timestamping */
1323 struct phy_device
*phydev
;
1325 struct lock_class_key
*qdisc_tx_busylock
;
1327 /* group the device belongs to */
1330 struct pm_qos_request pm_qos_req
;
1332 #define to_net_dev(d) container_of(d, struct net_device, dev)
1334 #define NETDEV_ALIGN 32
1337 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1339 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1343 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1345 if (tc
>= dev
->num_tc
)
1348 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1353 void netdev_reset_tc(struct net_device
*dev
)
1356 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1357 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1361 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1363 if (tc
>= dev
->num_tc
)
1366 dev
->tc_to_txq
[tc
].count
= count
;
1367 dev
->tc_to_txq
[tc
].offset
= offset
;
1372 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1374 if (num_tc
> TC_MAX_QUEUE
)
1377 dev
->num_tc
= num_tc
;
1382 int netdev_get_num_tc(struct net_device
*dev
)
1388 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1391 return &dev
->_tx
[index
];
1394 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1395 void (*f
)(struct net_device
*,
1396 struct netdev_queue
*,
1402 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1403 f(dev
, &dev
->_tx
[i
], arg
);
1406 extern struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1407 struct sk_buff
*skb
);
1410 * Net namespace inlines
1413 struct net
*dev_net(const struct net_device
*dev
)
1415 return read_pnet(&dev
->nd_net
);
1419 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1421 #ifdef CONFIG_NET_NS
1422 release_net(dev
->nd_net
);
1423 dev
->nd_net
= hold_net(net
);
1427 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1429 #ifdef CONFIG_NET_DSA_TAG_DSA
1430 if (dev
->dsa_ptr
!= NULL
)
1431 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1437 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1439 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1440 if (dev
->dsa_ptr
!= NULL
)
1441 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1448 * netdev_priv - access network device private data
1449 * @dev: network device
1451 * Get network device private data
1453 static inline void *netdev_priv(const struct net_device
*dev
)
1455 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1458 /* Set the sysfs physical device reference for the network logical device
1459 * if set prior to registration will cause a symlink during initialization.
1461 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1463 /* Set the sysfs device type for the network logical device to allow
1464 * fin grained indentification of different network device types. For
1465 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1467 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1470 * netif_napi_add - initialize a napi context
1471 * @dev: network device
1472 * @napi: napi context
1473 * @poll: polling function
1474 * @weight: default weight
1476 * netif_napi_add() must be used to initialize a napi context prior to calling
1477 * *any* of the other napi related functions.
1479 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1480 int (*poll
)(struct napi_struct
*, int), int weight
);
1483 * netif_napi_del - remove a napi context
1484 * @napi: napi context
1486 * netif_napi_del() removes a napi context from the network device napi list
1488 void netif_napi_del(struct napi_struct
*napi
);
1490 struct napi_gro_cb
{
1491 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1494 /* Length of frag0. */
1495 unsigned int frag0_len
;
1497 /* This indicates where we are processing relative to skb->data. */
1500 /* This is non-zero if the packet cannot be merged with the new skb. */
1503 /* Number of segments aggregated. */
1506 /* This is non-zero if the packet may be of the same flow. */
1511 #define NAPI_GRO_FREE 1
1512 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1514 /* jiffies when first packet was created/queued */
1517 /* Used in ipv6_gro_receive() */
1521 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1523 struct packet_type
{
1524 __be16 type
; /* This is really htons(ether_type). */
1525 struct net_device
*dev
; /* NULL is wildcarded here */
1526 int (*func
) (struct sk_buff
*,
1527 struct net_device
*,
1528 struct packet_type
*,
1529 struct net_device
*);
1530 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1531 netdev_features_t features
);
1532 int (*gso_send_check
)(struct sk_buff
*skb
);
1533 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1534 struct sk_buff
*skb
);
1535 int (*gro_complete
)(struct sk_buff
*skb
);
1536 bool (*id_match
)(struct packet_type
*ptype
,
1538 void *af_packet_priv
;
1539 struct list_head list
;
1542 #include <linux/notifier.h>
1544 /* netdevice notifier chain. Please remember to update the rtnetlink
1545 * notification exclusion list in rtnetlink_event() when adding new
1548 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1549 #define NETDEV_DOWN 0x0002
1550 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1551 detected a hardware crash and restarted
1552 - we can use this eg to kick tcp sessions
1554 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1555 #define NETDEV_REGISTER 0x0005
1556 #define NETDEV_UNREGISTER 0x0006
1557 #define NETDEV_CHANGEMTU 0x0007
1558 #define NETDEV_CHANGEADDR 0x0008
1559 #define NETDEV_GOING_DOWN 0x0009
1560 #define NETDEV_CHANGENAME 0x000A
1561 #define NETDEV_FEAT_CHANGE 0x000B
1562 #define NETDEV_BONDING_FAILOVER 0x000C
1563 #define NETDEV_PRE_UP 0x000D
1564 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1565 #define NETDEV_POST_TYPE_CHANGE 0x000F
1566 #define NETDEV_POST_INIT 0x0010
1567 #define NETDEV_UNREGISTER_FINAL 0x0011
1568 #define NETDEV_RELEASE 0x0012
1569 #define NETDEV_NOTIFY_PEERS 0x0013
1570 #define NETDEV_JOIN 0x0014
1572 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1573 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1574 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1577 extern rwlock_t dev_base_lock
; /* Device list lock */
1580 #define for_each_netdev(net, d) \
1581 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1582 #define for_each_netdev_reverse(net, d) \
1583 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1584 #define for_each_netdev_rcu(net, d) \
1585 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1586 #define for_each_netdev_safe(net, d, n) \
1587 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1588 #define for_each_netdev_continue(net, d) \
1589 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1590 #define for_each_netdev_continue_rcu(net, d) \
1591 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1592 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1594 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1596 struct list_head
*lh
;
1600 lh
= dev
->dev_list
.next
;
1601 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1604 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1606 struct list_head
*lh
;
1610 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1611 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1614 static inline struct net_device
*first_net_device(struct net
*net
)
1616 return list_empty(&net
->dev_base_head
) ? NULL
:
1617 net_device_entry(net
->dev_base_head
.next
);
1620 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1622 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1624 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1627 extern int netdev_boot_setup_check(struct net_device
*dev
);
1628 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1629 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1630 const char *hwaddr
);
1631 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1632 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1633 extern void dev_add_pack(struct packet_type
*pt
);
1634 extern void dev_remove_pack(struct packet_type
*pt
);
1635 extern void __dev_remove_pack(struct packet_type
*pt
);
1637 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1638 unsigned short mask
);
1639 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1640 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1641 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1642 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1643 extern int dev_open(struct net_device
*dev
);
1644 extern int dev_close(struct net_device
*dev
);
1645 extern void dev_disable_lro(struct net_device
*dev
);
1646 extern int dev_loopback_xmit(struct sk_buff
*newskb
);
1647 extern int dev_queue_xmit(struct sk_buff
*skb
);
1648 extern int register_netdevice(struct net_device
*dev
);
1649 extern void unregister_netdevice_queue(struct net_device
*dev
,
1650 struct list_head
*head
);
1651 extern void unregister_netdevice_many(struct list_head
*head
);
1652 static inline void unregister_netdevice(struct net_device
*dev
)
1654 unregister_netdevice_queue(dev
, NULL
);
1657 extern int netdev_refcnt_read(const struct net_device
*dev
);
1658 extern void free_netdev(struct net_device
*dev
);
1659 extern void synchronize_net(void);
1660 extern int init_dummy_netdev(struct net_device
*dev
);
1661 extern void netdev_resync_ops(struct net_device
*dev
);
1663 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1664 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1665 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1666 extern int dev_restart(struct net_device
*dev
);
1667 #ifdef CONFIG_NETPOLL_TRAP
1668 extern int netpoll_trap(void);
1670 extern int skb_gro_receive(struct sk_buff
**head
,
1671 struct sk_buff
*skb
);
1673 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1675 return NAPI_GRO_CB(skb
)->data_offset
;
1678 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1680 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1683 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1685 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1688 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1689 unsigned int offset
)
1691 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1694 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1696 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1699 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1700 unsigned int offset
)
1702 if (!pskb_may_pull(skb
, hlen
))
1705 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1706 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1707 return skb
->data
+ offset
;
1710 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1712 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1715 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1717 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1718 skb_network_offset(skb
);
1721 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1722 unsigned short type
,
1723 const void *daddr
, const void *saddr
,
1726 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1729 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1732 static inline int dev_parse_header(const struct sk_buff
*skb
,
1733 unsigned char *haddr
)
1735 const struct net_device
*dev
= skb
->dev
;
1737 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1739 return dev
->header_ops
->parse(skb
, haddr
);
1742 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1743 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1744 static inline int unregister_gifconf(unsigned int family
)
1746 return register_gifconf(family
, NULL
);
1750 * Incoming packets are placed on per-cpu queues
1752 struct softnet_data
{
1753 struct Qdisc
*output_queue
;
1754 struct Qdisc
**output_queue_tailp
;
1755 struct list_head poll_list
;
1756 struct sk_buff
*completion_queue
;
1757 struct sk_buff_head process_queue
;
1760 unsigned int processed
;
1761 unsigned int time_squeeze
;
1762 unsigned int cpu_collision
;
1763 unsigned int received_rps
;
1766 struct softnet_data
*rps_ipi_list
;
1768 /* Elements below can be accessed between CPUs for RPS */
1769 struct call_single_data csd ____cacheline_aligned_in_smp
;
1770 struct softnet_data
*rps_ipi_next
;
1772 unsigned int input_queue_head
;
1773 unsigned int input_queue_tail
;
1775 unsigned int dropped
;
1776 struct sk_buff_head input_pkt_queue
;
1777 struct napi_struct backlog
;
1780 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1783 sd
->input_queue_head
++;
1787 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1788 unsigned int *qtail
)
1791 *qtail
= ++sd
->input_queue_tail
;
1795 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1797 extern void __netif_schedule(struct Qdisc
*q
);
1799 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1801 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1802 __netif_schedule(txq
->qdisc
);
1805 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1809 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1810 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1813 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1815 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1819 * netif_start_queue - allow transmit
1820 * @dev: network device
1822 * Allow upper layers to call the device hard_start_xmit routine.
1824 static inline void netif_start_queue(struct net_device
*dev
)
1826 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1829 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1833 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1834 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1835 netif_tx_start_queue(txq
);
1839 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1841 #ifdef CONFIG_NETPOLL_TRAP
1842 if (netpoll_trap()) {
1843 netif_tx_start_queue(dev_queue
);
1847 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1848 __netif_schedule(dev_queue
->qdisc
);
1852 * netif_wake_queue - restart transmit
1853 * @dev: network device
1855 * Allow upper layers to call the device hard_start_xmit routine.
1856 * Used for flow control when transmit resources are available.
1858 static inline void netif_wake_queue(struct net_device
*dev
)
1860 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1863 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1867 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1868 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1869 netif_tx_wake_queue(txq
);
1873 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1875 if (WARN_ON(!dev_queue
)) {
1876 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1879 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1883 * netif_stop_queue - stop transmitted packets
1884 * @dev: network device
1886 * Stop upper layers calling the device hard_start_xmit routine.
1887 * Used for flow control when transmit resources are unavailable.
1889 static inline void netif_stop_queue(struct net_device
*dev
)
1891 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1894 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1898 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1899 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1900 netif_tx_stop_queue(txq
);
1904 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1906 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1910 * netif_queue_stopped - test if transmit queue is flowblocked
1911 * @dev: network device
1913 * Test if transmit queue on device is currently unable to send.
1915 static inline bool netif_queue_stopped(const struct net_device
*dev
)
1917 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1920 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
1922 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
1925 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
1927 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
1930 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
1934 dql_queued(&dev_queue
->dql
, bytes
);
1936 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
1939 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1942 * The XOFF flag must be set before checking the dql_avail below,
1943 * because in netdev_tx_completed_queue we update the dql_completed
1944 * before checking the XOFF flag.
1948 /* check again in case another CPU has just made room avail */
1949 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
1950 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1954 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
1956 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
1959 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
1960 unsigned int pkts
, unsigned int bytes
)
1963 if (unlikely(!bytes
))
1966 dql_completed(&dev_queue
->dql
, bytes
);
1969 * Without the memory barrier there is a small possiblity that
1970 * netdev_tx_sent_queue will miss the update and cause the queue to
1971 * be stopped forever
1975 if (dql_avail(&dev_queue
->dql
) < 0)
1978 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
1979 netif_schedule_queue(dev_queue
);
1983 static inline void netdev_completed_queue(struct net_device
*dev
,
1984 unsigned int pkts
, unsigned int bytes
)
1986 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
1989 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
1992 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
1997 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
1999 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2003 * netif_running - test if up
2004 * @dev: network device
2006 * Test if the device has been brought up.
2008 static inline bool netif_running(const struct net_device
*dev
)
2010 return test_bit(__LINK_STATE_START
, &dev
->state
);
2014 * Routines to manage the subqueues on a device. We only need start
2015 * stop, and a check if it's stopped. All other device management is
2016 * done at the overall netdevice level.
2017 * Also test the device if we're multiqueue.
2021 * netif_start_subqueue - allow sending packets on subqueue
2022 * @dev: network device
2023 * @queue_index: sub queue index
2025 * Start individual transmit queue of a device with multiple transmit queues.
2027 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2029 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2031 netif_tx_start_queue(txq
);
2035 * netif_stop_subqueue - stop sending packets on subqueue
2036 * @dev: network device
2037 * @queue_index: sub queue index
2039 * Stop individual transmit queue of a device with multiple transmit queues.
2041 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2043 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2044 #ifdef CONFIG_NETPOLL_TRAP
2048 netif_tx_stop_queue(txq
);
2052 * netif_subqueue_stopped - test status of subqueue
2053 * @dev: network device
2054 * @queue_index: sub queue index
2056 * Check individual transmit queue of a device with multiple transmit queues.
2058 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2061 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2063 return netif_tx_queue_stopped(txq
);
2066 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2067 struct sk_buff
*skb
)
2069 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2073 * netif_wake_subqueue - allow sending packets on subqueue
2074 * @dev: network device
2075 * @queue_index: sub queue index
2077 * Resume individual transmit queue of a device with multiple transmit queues.
2079 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2081 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2082 #ifdef CONFIG_NETPOLL_TRAP
2086 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2087 __netif_schedule(txq
->qdisc
);
2091 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2092 * as a distribution range limit for the returned value.
2094 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2095 const struct sk_buff
*skb
)
2097 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2101 * netif_is_multiqueue - test if device has multiple transmit queues
2102 * @dev: network device
2104 * Check if device has multiple transmit queues
2106 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2108 return dev
->num_tx_queues
> 1;
2111 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
2115 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
2118 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2125 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2126 const struct net_device
*from_dev
)
2130 err
= netif_set_real_num_tx_queues(to_dev
,
2131 from_dev
->real_num_tx_queues
);
2135 return netif_set_real_num_rx_queues(to_dev
,
2136 from_dev
->real_num_rx_queues
);
2142 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2143 extern int netif_get_num_default_rss_queues(void);
2145 /* Use this variant when it is known for sure that it
2146 * is executing from hardware interrupt context or with hardware interrupts
2149 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2151 /* Use this variant in places where it could be invoked
2152 * from either hardware interrupt or other context, with hardware interrupts
2153 * either disabled or enabled.
2155 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2157 extern int netif_rx(struct sk_buff
*skb
);
2158 extern int netif_rx_ni(struct sk_buff
*skb
);
2159 extern int netif_receive_skb(struct sk_buff
*skb
);
2160 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
2161 struct sk_buff
*skb
);
2162 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
2163 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2164 struct sk_buff
*skb
);
2165 extern void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2166 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2167 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
2168 struct sk_buff
*skb
,
2170 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2172 static inline void napi_free_frags(struct napi_struct
*napi
)
2174 kfree_skb(napi
->skb
);
2178 extern int netdev_rx_handler_register(struct net_device
*dev
,
2179 rx_handler_func_t
*rx_handler
,
2180 void *rx_handler_data
);
2181 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2183 extern bool dev_valid_name(const char *name
);
2184 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2185 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2186 extern unsigned int dev_get_flags(const struct net_device
*);
2187 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2188 extern int dev_change_flags(struct net_device
*, unsigned int);
2189 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2190 extern int dev_change_name(struct net_device
*, const char *);
2191 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2192 extern int dev_change_net_namespace(struct net_device
*,
2193 struct net
*, const char *);
2194 extern int dev_set_mtu(struct net_device
*, int);
2195 extern void dev_set_group(struct net_device
*, int);
2196 extern int dev_set_mac_address(struct net_device
*,
2198 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2199 struct net_device
*dev
,
2200 struct netdev_queue
*txq
);
2201 extern int dev_forward_skb(struct net_device
*dev
,
2202 struct sk_buff
*skb
);
2204 extern int netdev_budget
;
2206 /* Called by rtnetlink.c:rtnl_unlock() */
2207 extern void netdev_run_todo(void);
2210 * dev_put - release reference to device
2211 * @dev: network device
2213 * Release reference to device to allow it to be freed.
2215 static inline void dev_put(struct net_device
*dev
)
2217 this_cpu_dec(*dev
->pcpu_refcnt
);
2221 * dev_hold - get reference to device
2222 * @dev: network device
2224 * Hold reference to device to keep it from being freed.
2226 static inline void dev_hold(struct net_device
*dev
)
2228 this_cpu_inc(*dev
->pcpu_refcnt
);
2231 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2232 * and _off may be called from IRQ context, but it is caller
2233 * who is responsible for serialization of these calls.
2235 * The name carrier is inappropriate, these functions should really be
2236 * called netif_lowerlayer_*() because they represent the state of any
2237 * kind of lower layer not just hardware media.
2240 extern void linkwatch_init_dev(struct net_device
*dev
);
2241 extern void linkwatch_fire_event(struct net_device
*dev
);
2242 extern void linkwatch_forget_dev(struct net_device
*dev
);
2245 * netif_carrier_ok - test if carrier present
2246 * @dev: network device
2248 * Check if carrier is present on device
2250 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2252 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2255 extern unsigned long dev_trans_start(struct net_device
*dev
);
2257 extern void __netdev_watchdog_up(struct net_device
*dev
);
2259 extern void netif_carrier_on(struct net_device
*dev
);
2261 extern void netif_carrier_off(struct net_device
*dev
);
2264 * netif_dormant_on - mark device as dormant.
2265 * @dev: network device
2267 * Mark device as dormant (as per RFC2863).
2269 * The dormant state indicates that the relevant interface is not
2270 * actually in a condition to pass packets (i.e., it is not 'up') but is
2271 * in a "pending" state, waiting for some external event. For "on-
2272 * demand" interfaces, this new state identifies the situation where the
2273 * interface is waiting for events to place it in the up state.
2276 static inline void netif_dormant_on(struct net_device
*dev
)
2278 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2279 linkwatch_fire_event(dev
);
2283 * netif_dormant_off - set device as not dormant.
2284 * @dev: network device
2286 * Device is not in dormant state.
2288 static inline void netif_dormant_off(struct net_device
*dev
)
2290 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2291 linkwatch_fire_event(dev
);
2295 * netif_dormant - test if carrier present
2296 * @dev: network device
2298 * Check if carrier is present on device
2300 static inline bool netif_dormant(const struct net_device
*dev
)
2302 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2307 * netif_oper_up - test if device is operational
2308 * @dev: network device
2310 * Check if carrier is operational
2312 static inline bool netif_oper_up(const struct net_device
*dev
)
2314 return (dev
->operstate
== IF_OPER_UP
||
2315 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2319 * netif_device_present - is device available or removed
2320 * @dev: network device
2322 * Check if device has not been removed from system.
2324 static inline bool netif_device_present(struct net_device
*dev
)
2326 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2329 extern void netif_device_detach(struct net_device
*dev
);
2331 extern void netif_device_attach(struct net_device
*dev
);
2334 * Network interface message level settings
2338 NETIF_MSG_DRV
= 0x0001,
2339 NETIF_MSG_PROBE
= 0x0002,
2340 NETIF_MSG_LINK
= 0x0004,
2341 NETIF_MSG_TIMER
= 0x0008,
2342 NETIF_MSG_IFDOWN
= 0x0010,
2343 NETIF_MSG_IFUP
= 0x0020,
2344 NETIF_MSG_RX_ERR
= 0x0040,
2345 NETIF_MSG_TX_ERR
= 0x0080,
2346 NETIF_MSG_TX_QUEUED
= 0x0100,
2347 NETIF_MSG_INTR
= 0x0200,
2348 NETIF_MSG_TX_DONE
= 0x0400,
2349 NETIF_MSG_RX_STATUS
= 0x0800,
2350 NETIF_MSG_PKTDATA
= 0x1000,
2351 NETIF_MSG_HW
= 0x2000,
2352 NETIF_MSG_WOL
= 0x4000,
2355 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2356 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2357 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2358 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2359 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2360 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2361 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2362 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2363 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2364 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2365 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2366 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2367 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2368 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2369 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2371 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2374 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2375 return default_msg_enable_bits
;
2376 if (debug_value
== 0) /* no output */
2378 /* set low N bits */
2379 return (1 << debug_value
) - 1;
2382 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2384 spin_lock(&txq
->_xmit_lock
);
2385 txq
->xmit_lock_owner
= cpu
;
2388 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2390 spin_lock_bh(&txq
->_xmit_lock
);
2391 txq
->xmit_lock_owner
= smp_processor_id();
2394 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2396 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2398 txq
->xmit_lock_owner
= smp_processor_id();
2402 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2404 txq
->xmit_lock_owner
= -1;
2405 spin_unlock(&txq
->_xmit_lock
);
2408 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2410 txq
->xmit_lock_owner
= -1;
2411 spin_unlock_bh(&txq
->_xmit_lock
);
2414 static inline void txq_trans_update(struct netdev_queue
*txq
)
2416 if (txq
->xmit_lock_owner
!= -1)
2417 txq
->trans_start
= jiffies
;
2421 * netif_tx_lock - grab network device transmit lock
2422 * @dev: network device
2424 * Get network device transmit lock
2426 static inline void netif_tx_lock(struct net_device
*dev
)
2431 spin_lock(&dev
->tx_global_lock
);
2432 cpu
= smp_processor_id();
2433 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2434 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2436 /* We are the only thread of execution doing a
2437 * freeze, but we have to grab the _xmit_lock in
2438 * order to synchronize with threads which are in
2439 * the ->hard_start_xmit() handler and already
2440 * checked the frozen bit.
2442 __netif_tx_lock(txq
, cpu
);
2443 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2444 __netif_tx_unlock(txq
);
2448 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2454 static inline void netif_tx_unlock(struct net_device
*dev
)
2458 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2459 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2461 /* No need to grab the _xmit_lock here. If the
2462 * queue is not stopped for another reason, we
2465 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2466 netif_schedule_queue(txq
);
2468 spin_unlock(&dev
->tx_global_lock
);
2471 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2473 netif_tx_unlock(dev
);
2477 #define HARD_TX_LOCK(dev, txq, cpu) { \
2478 if ((dev->features & NETIF_F_LLTX) == 0) { \
2479 __netif_tx_lock(txq, cpu); \
2483 #define HARD_TX_UNLOCK(dev, txq) { \
2484 if ((dev->features & NETIF_F_LLTX) == 0) { \
2485 __netif_tx_unlock(txq); \
2489 static inline void netif_tx_disable(struct net_device
*dev
)
2495 cpu
= smp_processor_id();
2496 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2497 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2499 __netif_tx_lock(txq
, cpu
);
2500 netif_tx_stop_queue(txq
);
2501 __netif_tx_unlock(txq
);
2506 static inline void netif_addr_lock(struct net_device
*dev
)
2508 spin_lock(&dev
->addr_list_lock
);
2511 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2513 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2516 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2518 spin_lock_bh(&dev
->addr_list_lock
);
2521 static inline void netif_addr_unlock(struct net_device
*dev
)
2523 spin_unlock(&dev
->addr_list_lock
);
2526 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2528 spin_unlock_bh(&dev
->addr_list_lock
);
2532 * dev_addrs walker. Should be used only for read access. Call with
2533 * rcu_read_lock held.
2535 #define for_each_dev_addr(dev, ha) \
2536 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2538 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2540 extern void ether_setup(struct net_device
*dev
);
2542 /* Support for loadable net-drivers */
2543 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2544 void (*setup
)(struct net_device
*),
2545 unsigned int txqs
, unsigned int rxqs
);
2546 #define alloc_netdev(sizeof_priv, name, setup) \
2547 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2549 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2550 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2552 extern int register_netdev(struct net_device
*dev
);
2553 extern void unregister_netdev(struct net_device
*dev
);
2555 /* General hardware address lists handling functions */
2556 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2557 struct netdev_hw_addr_list
*from_list
,
2558 int addr_len
, unsigned char addr_type
);
2559 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2560 struct netdev_hw_addr_list
*from_list
,
2561 int addr_len
, unsigned char addr_type
);
2562 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2563 struct netdev_hw_addr_list
*from_list
,
2565 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2566 struct netdev_hw_addr_list
*from_list
,
2568 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2569 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2571 /* Functions used for device addresses handling */
2572 extern int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
2573 unsigned char addr_type
);
2574 extern int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
2575 unsigned char addr_type
);
2576 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2577 struct net_device
*from_dev
,
2578 unsigned char addr_type
);
2579 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2580 struct net_device
*from_dev
,
2581 unsigned char addr_type
);
2582 extern void dev_addr_flush(struct net_device
*dev
);
2583 extern int dev_addr_init(struct net_device
*dev
);
2585 /* Functions used for unicast addresses handling */
2586 extern int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
2587 extern int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2588 extern int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
2589 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2590 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2591 extern void dev_uc_flush(struct net_device
*dev
);
2592 extern void dev_uc_init(struct net_device
*dev
);
2594 /* Functions used for multicast addresses handling */
2595 extern int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
2596 extern int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
2597 extern int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2598 extern int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
2599 extern int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
2600 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2601 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2602 extern void dev_mc_flush(struct net_device
*dev
);
2603 extern void dev_mc_init(struct net_device
*dev
);
2605 /* Functions used for secondary unicast and multicast support */
2606 extern void dev_set_rx_mode(struct net_device
*dev
);
2607 extern void __dev_set_rx_mode(struct net_device
*dev
);
2608 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2609 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2610 extern void netdev_state_change(struct net_device
*dev
);
2611 extern void netdev_notify_peers(struct net_device
*dev
);
2612 extern void netdev_features_change(struct net_device
*dev
);
2613 /* Load a device via the kmod */
2614 extern void dev_load(struct net
*net
, const char *name
);
2615 extern void dev_mcast_init(void);
2616 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2617 struct rtnl_link_stats64
*storage
);
2618 extern void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
2619 const struct net_device_stats
*netdev_stats
);
2621 extern int netdev_max_backlog
;
2622 extern int netdev_tstamp_prequeue
;
2623 extern int weight_p
;
2624 extern int bpf_jit_enable
;
2625 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2626 extern int netdev_set_bond_master(struct net_device
*dev
,
2627 struct net_device
*master
);
2628 extern int skb_checksum_help(struct sk_buff
*skb
);
2629 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
,
2630 netdev_features_t features
);
2632 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2634 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2638 /* rx skb timestamps */
2639 extern void net_enable_timestamp(void);
2640 extern void net_disable_timestamp(void);
2642 #ifdef CONFIG_PROC_FS
2643 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2644 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2645 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2648 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2649 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2651 extern struct kobj_ns_type_operations net_ns_type_operations
;
2653 extern const char *netdev_drivername(const struct net_device
*dev
);
2655 extern void linkwatch_run_queue(void);
2657 static inline netdev_features_t
netdev_get_wanted_features(
2658 struct net_device
*dev
)
2660 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2662 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2663 netdev_features_t one
, netdev_features_t mask
);
2664 int __netdev_update_features(struct net_device
*dev
);
2665 void netdev_update_features(struct net_device
*dev
);
2666 void netdev_change_features(struct net_device
*dev
);
2668 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2669 struct net_device
*dev
);
2671 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2673 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
2675 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2677 /* check flags correspondence */
2678 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2679 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2680 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2681 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2682 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2683 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2685 return (features
& feature
) == feature
;
2688 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2690 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2691 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2694 static inline bool netif_needs_gso(struct sk_buff
*skb
,
2695 netdev_features_t features
)
2697 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2698 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
2699 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
2702 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2705 dev
->gso_max_size
= size
;
2708 static inline bool netif_is_bond_slave(struct net_device
*dev
)
2710 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2713 static inline bool netif_supports_nofcs(struct net_device
*dev
)
2715 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
2718 extern struct pernet_operations __net_initdata loopback_net_ops
;
2720 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2722 /* netdev_printk helpers, similar to dev_printk */
2724 static inline const char *netdev_name(const struct net_device
*dev
)
2726 if (dev
->reg_state
!= NETREG_REGISTERED
)
2727 return "(unregistered net_device)";
2731 extern __printf(3, 4)
2732 int netdev_printk(const char *level
, const struct net_device
*dev
,
2733 const char *format
, ...);
2734 extern __printf(2, 3)
2735 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2736 extern __printf(2, 3)
2737 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2738 extern __printf(2, 3)
2739 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2740 extern __printf(2, 3)
2741 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2742 extern __printf(2, 3)
2743 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2744 extern __printf(2, 3)
2745 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2746 extern __printf(2, 3)
2747 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2749 #define MODULE_ALIAS_NETDEV(device) \
2750 MODULE_ALIAS("netdev-" device)
2752 #if defined(CONFIG_DYNAMIC_DEBUG)
2753 #define netdev_dbg(__dev, format, args...) \
2755 dynamic_netdev_dbg(__dev, format, ##args); \
2757 #elif defined(DEBUG)
2758 #define netdev_dbg(__dev, format, args...) \
2759 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2761 #define netdev_dbg(__dev, format, args...) \
2764 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2769 #if defined(VERBOSE_DEBUG)
2770 #define netdev_vdbg netdev_dbg
2773 #define netdev_vdbg(dev, format, args...) \
2776 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2782 * netdev_WARN() acts like dev_printk(), but with the key difference
2783 * of using a WARN/WARN_ON to get the message out, including the
2784 * file/line information and a backtrace.
2786 #define netdev_WARN(dev, format, args...) \
2787 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2789 /* netif printk helpers, similar to netdev_printk */
2791 #define netif_printk(priv, type, level, dev, fmt, args...) \
2793 if (netif_msg_##type(priv)) \
2794 netdev_printk(level, (dev), fmt, ##args); \
2797 #define netif_level(level, priv, type, dev, fmt, args...) \
2799 if (netif_msg_##type(priv)) \
2800 netdev_##level(dev, fmt, ##args); \
2803 #define netif_emerg(priv, type, dev, fmt, args...) \
2804 netif_level(emerg, priv, type, dev, fmt, ##args)
2805 #define netif_alert(priv, type, dev, fmt, args...) \
2806 netif_level(alert, priv, type, dev, fmt, ##args)
2807 #define netif_crit(priv, type, dev, fmt, args...) \
2808 netif_level(crit, priv, type, dev, fmt, ##args)
2809 #define netif_err(priv, type, dev, fmt, args...) \
2810 netif_level(err, priv, type, dev, fmt, ##args)
2811 #define netif_warn(priv, type, dev, fmt, args...) \
2812 netif_level(warn, priv, type, dev, fmt, ##args)
2813 #define netif_notice(priv, type, dev, fmt, args...) \
2814 netif_level(notice, priv, type, dev, fmt, ##args)
2815 #define netif_info(priv, type, dev, fmt, args...) \
2816 netif_level(info, priv, type, dev, fmt, ##args)
2818 #if defined(CONFIG_DYNAMIC_DEBUG)
2819 #define netif_dbg(priv, type, netdev, format, args...) \
2821 if (netif_msg_##type(priv)) \
2822 dynamic_netdev_dbg(netdev, format, ##args); \
2824 #elif defined(DEBUG)
2825 #define netif_dbg(priv, type, dev, format, args...) \
2826 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2828 #define netif_dbg(priv, type, dev, format, args...) \
2831 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2836 #if defined(VERBOSE_DEBUG)
2837 #define netif_vdbg netif_dbg
2839 #define netif_vdbg(priv, type, dev, format, args...) \
2842 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2847 #endif /* __KERNEL__ */
2849 #endif /* _LINUX_NETDEVICE_H */