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 int (*poll
)(struct napi_struct
*, int);
342 #ifdef CONFIG_NETPOLL
343 spinlock_t poll_lock
;
347 unsigned int gro_count
;
349 struct net_device
*dev
;
350 struct list_head dev_list
;
351 struct sk_buff
*gro_list
;
356 NAPI_STATE_SCHED
, /* Poll is scheduled */
357 NAPI_STATE_DISABLE
, /* Disable pending */
358 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
368 typedef enum gro_result gro_result_t
;
371 * enum rx_handler_result - Possible return values for rx_handlers.
372 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
374 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
375 * case skb->dev was changed by rx_handler.
376 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
377 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
379 * rx_handlers are functions called from inside __netif_receive_skb(), to do
380 * special processing of the skb, prior to delivery to protocol handlers.
382 * Currently, a net_device can only have a single rx_handler registered. Trying
383 * to register a second rx_handler will return -EBUSY.
385 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
386 * To unregister a rx_handler on a net_device, use
387 * netdev_rx_handler_unregister().
389 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
392 * If the rx_handler consumed to skb in some way, it should return
393 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
394 * the skb to be delivered in some other ways.
396 * If the rx_handler changed skb->dev, to divert the skb to another
397 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
398 * new device will be called if it exists.
400 * If the rx_handler consider the skb should be ignored, it should return
401 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
402 * are registred on exact device (ptype->dev == skb->dev).
404 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
405 * delivered, it should return RX_HANDLER_PASS.
407 * A device without a registered rx_handler will behave as if rx_handler
408 * returned RX_HANDLER_PASS.
411 enum rx_handler_result
{
417 typedef enum rx_handler_result rx_handler_result_t
;
418 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
420 extern void __napi_schedule(struct napi_struct
*n
);
422 static inline bool napi_disable_pending(struct napi_struct
*n
)
424 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
428 * napi_schedule_prep - check if napi can be scheduled
431 * Test if NAPI routine is already running, and if not mark
432 * it as running. This is used as a condition variable
433 * insure only one NAPI poll instance runs. We also make
434 * sure there is no pending NAPI disable.
436 static inline bool napi_schedule_prep(struct napi_struct
*n
)
438 return !napi_disable_pending(n
) &&
439 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
443 * napi_schedule - schedule NAPI poll
446 * Schedule NAPI poll routine to be called if it is not already
449 static inline void napi_schedule(struct napi_struct
*n
)
451 if (napi_schedule_prep(n
))
455 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
456 static inline bool napi_reschedule(struct napi_struct
*napi
)
458 if (napi_schedule_prep(napi
)) {
459 __napi_schedule(napi
);
466 * napi_complete - NAPI processing complete
469 * Mark NAPI processing as complete.
471 extern void __napi_complete(struct napi_struct
*n
);
472 extern void napi_complete(struct napi_struct
*n
);
475 * napi_disable - prevent NAPI from scheduling
478 * Stop NAPI from being scheduled on this context.
479 * Waits till any outstanding processing completes.
481 static inline void napi_disable(struct napi_struct
*n
)
483 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
484 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
486 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
490 * napi_enable - enable NAPI scheduling
493 * Resume NAPI from being scheduled on this context.
494 * Must be paired with napi_disable.
496 static inline void napi_enable(struct napi_struct
*n
)
498 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
499 smp_mb__before_clear_bit();
500 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
505 * napi_synchronize - wait until NAPI is not running
508 * Wait until NAPI is done being scheduled on this context.
509 * Waits till any outstanding processing completes but
510 * does not disable future activations.
512 static inline void napi_synchronize(const struct napi_struct
*n
)
514 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
518 # define napi_synchronize(n) barrier()
521 enum netdev_queue_state_t
{
522 __QUEUE_STATE_DRV_XOFF
,
523 __QUEUE_STATE_STACK_XOFF
,
524 __QUEUE_STATE_FROZEN
,
525 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
526 (1 << __QUEUE_STATE_STACK_XOFF))
527 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
528 (1 << __QUEUE_STATE_FROZEN))
531 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
532 * netif_tx_* functions below are used to manipulate this flag. The
533 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
534 * queue independently. The netif_xmit_*stopped functions below are called
535 * to check if the queue has been stopped by the driver or stack (either
536 * of the XOFF bits are set in the state). Drivers should not need to call
537 * netif_xmit*stopped functions, they should only be using netif_tx_*.
540 struct netdev_queue
{
544 struct net_device
*dev
;
546 struct Qdisc
*qdisc_sleeping
;
550 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
556 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
559 * please use this field instead of dev->trans_start
561 unsigned long trans_start
;
564 * Number of TX timeouts for this queue
565 * (/sys/class/net/DEV/Q/trans_timeout)
567 unsigned long trans_timeout
;
574 } ____cacheline_aligned_in_smp
;
576 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
578 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
585 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
587 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
594 * This structure holds an RPS map which can be of variable length. The
595 * map is an array of CPUs.
602 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
605 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
606 * tail pointer for that CPU's input queue at the time of last enqueue, and
607 * a hardware filter index.
609 struct rps_dev_flow
{
612 unsigned int last_qtail
;
614 #define RPS_NO_FILTER 0xffff
617 * The rps_dev_flow_table structure contains a table of flow mappings.
619 struct rps_dev_flow_table
{
622 struct work_struct free_work
;
623 struct rps_dev_flow flows
[0];
625 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
626 ((_num) * sizeof(struct rps_dev_flow)))
629 * The rps_sock_flow_table contains mappings of flows to the last CPU
630 * on which they were processed by the application (set in recvmsg).
632 struct rps_sock_flow_table
{
636 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
637 ((_num) * sizeof(u16)))
639 #define RPS_NO_CPU 0xffff
641 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
645 unsigned int cpu
, index
= hash
& table
->mask
;
647 /* We only give a hint, preemption can change cpu under us */
648 cpu
= raw_smp_processor_id();
650 if (table
->ents
[index
] != cpu
)
651 table
->ents
[index
] = cpu
;
655 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
659 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
662 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
664 #ifdef CONFIG_RFS_ACCEL
665 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
666 u32 flow_id
, u16 filter_id
);
669 /* This structure contains an instance of an RX queue. */
670 struct netdev_rx_queue
{
671 struct rps_map __rcu
*rps_map
;
672 struct rps_dev_flow_table __rcu
*rps_flow_table
;
674 struct net_device
*dev
;
675 } ____cacheline_aligned_in_smp
;
676 #endif /* CONFIG_RPS */
680 * This structure holds an XPS map which can be of variable length. The
681 * map is an array of queues.
685 unsigned int alloc_len
;
689 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
690 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
694 * This structure holds all XPS maps for device. Maps are indexed by CPU.
696 struct xps_dev_maps
{
698 struct xps_map __rcu
*cpu_map
[0];
700 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
701 (nr_cpu_ids * sizeof(struct xps_map *)))
702 #endif /* CONFIG_XPS */
704 #define TC_MAX_QUEUE 16
705 #define TC_BITMASK 15
706 /* HW offloaded queuing disciplines txq count and offset maps */
707 struct netdev_tc_txq
{
712 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
714 * This structure is to hold information about the device
715 * configured to run FCoE protocol stack.
717 struct netdev_fcoe_hbainfo
{
718 char manufacturer
[64];
719 char serial_number
[64];
720 char hardware_version
[64];
721 char driver_version
[64];
722 char optionrom_version
[64];
723 char firmware_version
[64];
725 char model_description
[256];
730 * This structure defines the management hooks for network devices.
731 * The following hooks can be defined; unless noted otherwise, they are
732 * optional and can be filled with a null pointer.
734 * int (*ndo_init)(struct net_device *dev);
735 * This function is called once when network device is registered.
736 * The network device can use this to any late stage initializaton
737 * or semantic validattion. It can fail with an error code which will
738 * be propogated back to register_netdev
740 * void (*ndo_uninit)(struct net_device *dev);
741 * This function is called when device is unregistered or when registration
742 * fails. It is not called if init fails.
744 * int (*ndo_open)(struct net_device *dev);
745 * This function is called when network device transistions to the up
748 * int (*ndo_stop)(struct net_device *dev);
749 * This function is called when network device transistions to the down
752 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
753 * struct net_device *dev);
754 * Called when a packet needs to be transmitted.
755 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
756 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
757 * Required can not be NULL.
759 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
760 * Called to decide which queue to when device supports multiple
763 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
764 * This function is called to allow device receiver to make
765 * changes to configuration when multicast or promiscious is enabled.
767 * void (*ndo_set_rx_mode)(struct net_device *dev);
768 * This function is called device changes address list filtering.
769 * If driver handles unicast address filtering, it should set
770 * IFF_UNICAST_FLT to its priv_flags.
772 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
773 * This function is called when the Media Access Control address
774 * needs to be changed. If this interface is not defined, the
775 * mac address can not be changed.
777 * int (*ndo_validate_addr)(struct net_device *dev);
778 * Test if Media Access Control address is valid for the device.
780 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
781 * Called when a user request an ioctl which can't be handled by
782 * the generic interface code. If not defined ioctl's return
783 * not supported error code.
785 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
786 * Used to set network devices bus interface parameters. This interface
787 * is retained for legacy reason, new devices should use the bus
788 * interface (PCI) for low level management.
790 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
791 * Called when a user wants to change the Maximum Transfer Unit
792 * of a device. If not defined, any request to change MTU will
793 * will return an error.
795 * void (*ndo_tx_timeout)(struct net_device *dev);
796 * Callback uses when the transmitter has not made any progress
797 * for dev->watchdog ticks.
799 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
800 * struct rtnl_link_stats64 *storage);
801 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
802 * Called when a user wants to get the network device usage
803 * statistics. Drivers must do one of the following:
804 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
805 * rtnl_link_stats64 structure passed by the caller.
806 * 2. Define @ndo_get_stats to update a net_device_stats structure
807 * (which should normally be dev->stats) and return a pointer to
808 * it. The structure may be changed asynchronously only if each
809 * field is written atomically.
810 * 3. Update dev->stats asynchronously and atomically, and define
813 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
814 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
815 * this function is called when a VLAN id is registered.
817 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
818 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
819 * this function is called when a VLAN id is unregistered.
821 * void (*ndo_poll_controller)(struct net_device *dev);
823 * SR-IOV management functions.
824 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
825 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
826 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
827 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
828 * int (*ndo_get_vf_config)(struct net_device *dev,
829 * int vf, struct ifla_vf_info *ivf);
830 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
831 * struct nlattr *port[]);
832 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
833 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
834 * Called to setup 'tc' number of traffic classes in the net device. This
835 * is always called from the stack with the rtnl lock held and netif tx
836 * queues stopped. This allows the netdevice to perform queue management
839 * Fiber Channel over Ethernet (FCoE) offload functions.
840 * int (*ndo_fcoe_enable)(struct net_device *dev);
841 * Called when the FCoE protocol stack wants to start using LLD for FCoE
842 * so the underlying device can perform whatever needed configuration or
843 * initialization to support acceleration of FCoE traffic.
845 * int (*ndo_fcoe_disable)(struct net_device *dev);
846 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
847 * so the underlying device can perform whatever needed clean-ups to
848 * stop supporting acceleration of FCoE traffic.
850 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
851 * struct scatterlist *sgl, unsigned int sgc);
852 * Called when the FCoE Initiator wants to initialize an I/O that
853 * is a possible candidate for Direct Data Placement (DDP). The LLD can
854 * perform necessary setup and returns 1 to indicate the device is set up
855 * successfully to perform DDP on this I/O, otherwise this returns 0.
857 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
858 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
859 * indicated by the FC exchange id 'xid', so the underlying device can
860 * clean up and reuse resources for later DDP requests.
862 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
863 * struct scatterlist *sgl, unsigned int sgc);
864 * Called when the FCoE Target wants to initialize an I/O that
865 * is a possible candidate for Direct Data Placement (DDP). The LLD can
866 * perform necessary setup and returns 1 to indicate the device is set up
867 * successfully to perform DDP on this I/O, otherwise this returns 0.
869 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
870 * struct netdev_fcoe_hbainfo *hbainfo);
871 * Called when the FCoE Protocol stack wants information on the underlying
872 * device. This information is utilized by the FCoE protocol stack to
873 * register attributes with Fiber Channel management service as per the
874 * FC-GS Fabric Device Management Information(FDMI) specification.
876 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
877 * Called when the underlying device wants to override default World Wide
878 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
879 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
880 * protocol stack to use.
883 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
884 * u16 rxq_index, u32 flow_id);
885 * Set hardware filter for RFS. rxq_index is the target queue index;
886 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
887 * Return the filter ID on success, or a negative error code.
889 * Slave management functions (for bridge, bonding, etc). User should
890 * call netdev_set_master() to set dev->master properly.
891 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
892 * Called to make another netdev an underling.
894 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
895 * Called to release previously enslaved netdev.
897 * Feature/offload setting functions.
898 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
899 * netdev_features_t features);
900 * Adjusts the requested feature flags according to device-specific
901 * constraints, and returns the resulting flags. Must not modify
904 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
905 * Called to update device configuration to new features. Passed
906 * feature set might be less than what was returned by ndo_fix_features()).
907 * Must return >0 or -errno if it changed dev->features itself.
909 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct net_device *dev,
910 * unsigned char *addr, u16 flags)
911 * Adds an FDB entry to dev for addr.
912 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev,
913 * unsigned char *addr)
914 * Deletes the FDB entry from dev coresponding to addr.
915 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
916 * struct net_device *dev, int idx)
917 * Used to add FDB entries to dump requests. Implementers should add
918 * entries to skb and update idx with the number of entries.
920 struct net_device_ops
{
921 int (*ndo_init
)(struct net_device
*dev
);
922 void (*ndo_uninit
)(struct net_device
*dev
);
923 int (*ndo_open
)(struct net_device
*dev
);
924 int (*ndo_stop
)(struct net_device
*dev
);
925 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
926 struct net_device
*dev
);
927 u16 (*ndo_select_queue
)(struct net_device
*dev
,
928 struct sk_buff
*skb
);
929 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
931 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
932 int (*ndo_set_mac_address
)(struct net_device
*dev
,
934 int (*ndo_validate_addr
)(struct net_device
*dev
);
935 int (*ndo_do_ioctl
)(struct net_device
*dev
,
936 struct ifreq
*ifr
, int cmd
);
937 int (*ndo_set_config
)(struct net_device
*dev
,
939 int (*ndo_change_mtu
)(struct net_device
*dev
,
941 int (*ndo_neigh_setup
)(struct net_device
*dev
,
942 struct neigh_parms
*);
943 void (*ndo_tx_timeout
) (struct net_device
*dev
);
945 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
946 struct rtnl_link_stats64
*storage
);
947 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
949 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
951 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
953 #ifdef CONFIG_NET_POLL_CONTROLLER
954 void (*ndo_poll_controller
)(struct net_device
*dev
);
955 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
956 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 net_device
*dev
,
1019 unsigned char *addr
,
1021 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1022 struct net_device
*dev
,
1023 unsigned char *addr
);
1024 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1025 struct netlink_callback
*cb
,
1026 struct net_device
*dev
,
1031 * The DEVICE structure.
1032 * Actually, this whole structure is a big mistake. It mixes I/O
1033 * data with strictly "high-level" data, and it has to know about
1034 * almost every data structure used in the INET module.
1036 * FIXME: cleanup struct net_device such that network protocol info
1043 * This is the first field of the "visible" part of this structure
1044 * (i.e. as seen by users in the "Space.c" file). It is the name
1047 char name
[IFNAMSIZ
];
1049 /* device name hash chain, please keep it close to name[] */
1050 struct hlist_node name_hlist
;
1056 * I/O specific fields
1057 * FIXME: Merge these and struct ifmap into one
1059 unsigned long mem_end
; /* shared mem end */
1060 unsigned long mem_start
; /* shared mem start */
1061 unsigned long base_addr
; /* device I/O address */
1062 unsigned int irq
; /* device IRQ number */
1065 * Some hardware also needs these fields, but they are not
1066 * part of the usual set specified in Space.c.
1069 unsigned long state
;
1071 struct list_head dev_list
;
1072 struct list_head napi_list
;
1073 struct list_head unreg_list
;
1075 /* currently active device features */
1076 netdev_features_t features
;
1077 /* user-changeable features */
1078 netdev_features_t hw_features
;
1079 /* user-requested features */
1080 netdev_features_t wanted_features
;
1081 /* mask of features inheritable by VLAN devices */
1082 netdev_features_t vlan_features
;
1084 /* Interface index. Unique device identifier */
1088 struct net_device_stats stats
;
1089 atomic_long_t rx_dropped
; /* dropped packets by core network
1090 * Do not use this in drivers.
1093 #ifdef CONFIG_WIRELESS_EXT
1094 /* List of functions to handle Wireless Extensions (instead of ioctl).
1095 * See <net/iw_handler.h> for details. Jean II */
1096 const struct iw_handler_def
* wireless_handlers
;
1097 /* Instance data managed by the core of Wireless Extensions. */
1098 struct iw_public_data
* wireless_data
;
1100 /* Management operations */
1101 const struct net_device_ops
*netdev_ops
;
1102 const struct ethtool_ops
*ethtool_ops
;
1104 /* Hardware header description */
1105 const struct header_ops
*header_ops
;
1107 unsigned int flags
; /* interface flags (a la BSD) */
1108 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1109 * See if.h for definitions. */
1110 unsigned short gflags
;
1111 unsigned short padded
; /* How much padding added by alloc_netdev() */
1113 unsigned char operstate
; /* RFC2863 operstate */
1114 unsigned char link_mode
; /* mapping policy to operstate */
1116 unsigned char if_port
; /* Selectable AUI, TP,..*/
1117 unsigned char dma
; /* DMA channel */
1119 unsigned int mtu
; /* interface MTU value */
1120 unsigned short type
; /* interface hardware type */
1121 unsigned short hard_header_len
; /* hardware hdr length */
1123 /* extra head- and tailroom the hardware may need, but not in all cases
1124 * can this be guaranteed, especially tailroom. Some cases also use
1125 * LL_MAX_HEADER instead to allocate the skb.
1127 unsigned short needed_headroom
;
1128 unsigned short needed_tailroom
;
1130 /* Interface address info. */
1131 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1132 unsigned char addr_assign_type
; /* hw address assignment type */
1133 unsigned char addr_len
; /* hardware address length */
1134 unsigned char neigh_priv_len
;
1135 unsigned short dev_id
; /* for shared network cards */
1137 spinlock_t addr_list_lock
;
1138 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1139 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1141 unsigned int promiscuity
;
1142 unsigned int allmulti
;
1145 /* Protocol specific pointers */
1147 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1148 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1150 #if IS_ENABLED(CONFIG_NET_DSA)
1151 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1153 void *atalk_ptr
; /* AppleTalk link */
1154 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1155 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1156 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1157 void *ax25_ptr
; /* AX.25 specific data */
1158 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1159 assign before registering */
1162 * Cache lines mostly used on receive path (including eth_type_trans())
1164 unsigned long last_rx
; /* Time of last Rx
1165 * This should not be set in
1166 * drivers, unless really needed,
1167 * because network stack (bonding)
1168 * use it if/when necessary, to
1169 * avoid dirtying this cache line.
1172 struct net_device
*master
; /* Pointer to master device of a group,
1173 * which this device is member of.
1176 /* Interface address info used in eth_type_trans() */
1177 unsigned char *dev_addr
; /* hw address, (before bcast
1178 because most packets are
1181 struct netdev_hw_addr_list dev_addrs
; /* list of device
1184 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1187 struct kset
*queues_kset
;
1191 struct netdev_rx_queue
*_rx
;
1193 /* Number of RX queues allocated at register_netdev() time */
1194 unsigned int num_rx_queues
;
1196 /* Number of RX queues currently active in device */
1197 unsigned int real_num_rx_queues
;
1199 #ifdef CONFIG_RFS_ACCEL
1200 /* CPU reverse-mapping for RX completion interrupts, indexed
1201 * by RX queue number. Assigned by driver. This must only be
1202 * set if the ndo_rx_flow_steer operation is defined. */
1203 struct cpu_rmap
*rx_cpu_rmap
;
1207 rx_handler_func_t __rcu
*rx_handler
;
1208 void __rcu
*rx_handler_data
;
1210 struct netdev_queue __rcu
*ingress_queue
;
1213 * Cache lines mostly used on transmit path
1215 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1217 /* Number of TX queues allocated at alloc_netdev_mq() time */
1218 unsigned int num_tx_queues
;
1220 /* Number of TX queues currently active in device */
1221 unsigned int real_num_tx_queues
;
1223 /* root qdisc from userspace point of view */
1224 struct Qdisc
*qdisc
;
1226 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1227 spinlock_t tx_global_lock
;
1230 struct xps_dev_maps __rcu
*xps_maps
;
1233 /* These may be needed for future network-power-down code. */
1236 * trans_start here is expensive for high speed devices on SMP,
1237 * please use netdev_queue->trans_start instead.
1239 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1241 int watchdog_timeo
; /* used by dev_watchdog() */
1242 struct timer_list watchdog_timer
;
1244 /* Number of references to this device */
1245 int __percpu
*pcpu_refcnt
;
1247 /* delayed register/unregister */
1248 struct list_head todo_list
;
1249 /* device index hash chain */
1250 struct hlist_node index_hlist
;
1252 struct list_head link_watch_list
;
1254 /* register/unregister state machine */
1255 enum { NETREG_UNINITIALIZED
=0,
1256 NETREG_REGISTERED
, /* completed register_netdevice */
1257 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1258 NETREG_UNREGISTERED
, /* completed unregister todo */
1259 NETREG_RELEASED
, /* called free_netdev */
1260 NETREG_DUMMY
, /* dummy device for NAPI poll */
1263 bool dismantle
; /* device is going do be freed */
1266 RTNL_LINK_INITIALIZED
,
1267 RTNL_LINK_INITIALIZING
,
1268 } rtnl_link_state
:16;
1270 /* Called from unregister, can be used to call free_netdev */
1271 void (*destructor
)(struct net_device
*dev
);
1273 #ifdef CONFIG_NETPOLL
1274 struct netpoll_info
*npinfo
;
1277 #ifdef CONFIG_NET_NS
1278 /* Network namespace this network device is inside */
1282 /* mid-layer private */
1285 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1286 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1287 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1290 struct garp_port __rcu
*garp_port
;
1292 /* class/net/name entry */
1294 /* space for optional device, statistics, and wireless sysfs groups */
1295 const struct attribute_group
*sysfs_groups
[4];
1297 /* rtnetlink link ops */
1298 const struct rtnl_link_ops
*rtnl_link_ops
;
1300 /* for setting kernel sock attribute on TCP connection setup */
1301 #define GSO_MAX_SIZE 65536
1302 unsigned int gso_max_size
;
1303 #define GSO_MAX_SEGS 65535
1307 /* Data Center Bridging netlink ops */
1308 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1311 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1312 u8 prio_tc_map
[TC_BITMASK
+ 1];
1314 #if IS_ENABLED(CONFIG_FCOE)
1315 /* max exchange id for FCoE LRO by ddp */
1316 unsigned int fcoe_ddp_xid
;
1318 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1319 struct netprio_map __rcu
*priomap
;
1321 /* phy device may attach itself for hardware timestamping */
1322 struct phy_device
*phydev
;
1324 /* group the device belongs to */
1327 struct pm_qos_request pm_qos_req
;
1329 #define to_net_dev(d) container_of(d, struct net_device, dev)
1331 #define NETDEV_ALIGN 32
1334 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1336 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1340 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1342 if (tc
>= dev
->num_tc
)
1345 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1350 void netdev_reset_tc(struct net_device
*dev
)
1353 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1354 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1358 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1360 if (tc
>= dev
->num_tc
)
1363 dev
->tc_to_txq
[tc
].count
= count
;
1364 dev
->tc_to_txq
[tc
].offset
= offset
;
1369 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1371 if (num_tc
> TC_MAX_QUEUE
)
1374 dev
->num_tc
= num_tc
;
1379 int netdev_get_num_tc(struct net_device
*dev
)
1385 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1388 return &dev
->_tx
[index
];
1391 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1392 void (*f
)(struct net_device
*,
1393 struct netdev_queue
*,
1399 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1400 f(dev
, &dev
->_tx
[i
], arg
);
1404 * Net namespace inlines
1407 struct net
*dev_net(const struct net_device
*dev
)
1409 return read_pnet(&dev
->nd_net
);
1413 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1415 #ifdef CONFIG_NET_NS
1416 release_net(dev
->nd_net
);
1417 dev
->nd_net
= hold_net(net
);
1421 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1423 #ifdef CONFIG_NET_DSA_TAG_DSA
1424 if (dev
->dsa_ptr
!= NULL
)
1425 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1431 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1433 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1434 if (dev
->dsa_ptr
!= NULL
)
1435 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1442 * netdev_priv - access network device private data
1443 * @dev: network device
1445 * Get network device private data
1447 static inline void *netdev_priv(const struct net_device
*dev
)
1449 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1452 /* Set the sysfs physical device reference for the network logical device
1453 * if set prior to registration will cause a symlink during initialization.
1455 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1457 /* Set the sysfs device type for the network logical device to allow
1458 * fin grained indentification of different network device types. For
1459 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1461 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1464 * netif_napi_add - initialize a napi context
1465 * @dev: network device
1466 * @napi: napi context
1467 * @poll: polling function
1468 * @weight: default weight
1470 * netif_napi_add() must be used to initialize a napi context prior to calling
1471 * *any* of the other napi related functions.
1473 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1474 int (*poll
)(struct napi_struct
*, int), int weight
);
1477 * netif_napi_del - remove a napi context
1478 * @napi: napi context
1480 * netif_napi_del() removes a napi context from the network device napi list
1482 void netif_napi_del(struct napi_struct
*napi
);
1484 struct napi_gro_cb
{
1485 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1488 /* Length of frag0. */
1489 unsigned int frag0_len
;
1491 /* This indicates where we are processing relative to skb->data. */
1494 /* This is non-zero if the packet may be of the same flow. */
1497 /* This is non-zero if the packet cannot be merged with the new skb. */
1500 /* Number of segments aggregated. */
1505 #define NAPI_GRO_FREE 1
1506 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1509 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1511 struct packet_type
{
1512 __be16 type
; /* This is really htons(ether_type). */
1513 struct net_device
*dev
; /* NULL is wildcarded here */
1514 int (*func
) (struct sk_buff
*,
1515 struct net_device
*,
1516 struct packet_type
*,
1517 struct net_device
*);
1518 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1519 netdev_features_t features
);
1520 int (*gso_send_check
)(struct sk_buff
*skb
);
1521 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1522 struct sk_buff
*skb
);
1523 int (*gro_complete
)(struct sk_buff
*skb
);
1524 void *af_packet_priv
;
1525 struct list_head list
;
1528 #include <linux/notifier.h>
1530 /* netdevice notifier chain. Please remember to update the rtnetlink
1531 * notification exclusion list in rtnetlink_event() when adding new
1534 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1535 #define NETDEV_DOWN 0x0002
1536 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1537 detected a hardware crash and restarted
1538 - we can use this eg to kick tcp sessions
1540 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1541 #define NETDEV_REGISTER 0x0005
1542 #define NETDEV_UNREGISTER 0x0006
1543 #define NETDEV_CHANGEMTU 0x0007
1544 #define NETDEV_CHANGEADDR 0x0008
1545 #define NETDEV_GOING_DOWN 0x0009
1546 #define NETDEV_CHANGENAME 0x000A
1547 #define NETDEV_FEAT_CHANGE 0x000B
1548 #define NETDEV_BONDING_FAILOVER 0x000C
1549 #define NETDEV_PRE_UP 0x000D
1550 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1551 #define NETDEV_POST_TYPE_CHANGE 0x000F
1552 #define NETDEV_POST_INIT 0x0010
1553 #define NETDEV_UNREGISTER_BATCH 0x0011
1554 #define NETDEV_RELEASE 0x0012
1555 #define NETDEV_NOTIFY_PEERS 0x0013
1556 #define NETDEV_JOIN 0x0014
1558 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1559 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1560 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1563 extern rwlock_t dev_base_lock
; /* Device list lock */
1566 #define for_each_netdev(net, d) \
1567 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1568 #define for_each_netdev_reverse(net, d) \
1569 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1570 #define for_each_netdev_rcu(net, d) \
1571 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1572 #define for_each_netdev_safe(net, d, n) \
1573 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1574 #define for_each_netdev_continue(net, d) \
1575 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1576 #define for_each_netdev_continue_rcu(net, d) \
1577 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1578 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1580 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1582 struct list_head
*lh
;
1586 lh
= dev
->dev_list
.next
;
1587 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1590 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1592 struct list_head
*lh
;
1596 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1597 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1600 static inline struct net_device
*first_net_device(struct net
*net
)
1602 return list_empty(&net
->dev_base_head
) ? NULL
:
1603 net_device_entry(net
->dev_base_head
.next
);
1606 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1608 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1610 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1613 extern int netdev_boot_setup_check(struct net_device
*dev
);
1614 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1615 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1616 const char *hwaddr
);
1617 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1618 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1619 extern void dev_add_pack(struct packet_type
*pt
);
1620 extern void dev_remove_pack(struct packet_type
*pt
);
1621 extern void __dev_remove_pack(struct packet_type
*pt
);
1623 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1624 unsigned short mask
);
1625 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1626 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1627 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1628 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1629 extern int dev_open(struct net_device
*dev
);
1630 extern int dev_close(struct net_device
*dev
);
1631 extern void dev_disable_lro(struct net_device
*dev
);
1632 extern int dev_loopback_xmit(struct sk_buff
*newskb
);
1633 extern int dev_queue_xmit(struct sk_buff
*skb
);
1634 extern int register_netdevice(struct net_device
*dev
);
1635 extern void unregister_netdevice_queue(struct net_device
*dev
,
1636 struct list_head
*head
);
1637 extern void unregister_netdevice_many(struct list_head
*head
);
1638 static inline void unregister_netdevice(struct net_device
*dev
)
1640 unregister_netdevice_queue(dev
, NULL
);
1643 extern int netdev_refcnt_read(const struct net_device
*dev
);
1644 extern void free_netdev(struct net_device
*dev
);
1645 extern void synchronize_net(void);
1646 extern int init_dummy_netdev(struct net_device
*dev
);
1647 extern void netdev_resync_ops(struct net_device
*dev
);
1649 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1650 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1651 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1652 extern int dev_restart(struct net_device
*dev
);
1653 #ifdef CONFIG_NETPOLL_TRAP
1654 extern int netpoll_trap(void);
1656 extern int skb_gro_receive(struct sk_buff
**head
,
1657 struct sk_buff
*skb
);
1658 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1660 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1662 return NAPI_GRO_CB(skb
)->data_offset
;
1665 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1667 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1670 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1672 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1675 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1676 unsigned int offset
)
1678 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1681 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1683 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1686 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1687 unsigned int offset
)
1689 if (!pskb_may_pull(skb
, hlen
))
1692 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1693 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1694 return skb
->data
+ offset
;
1697 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1699 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1702 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1704 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1705 skb_network_offset(skb
);
1708 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1709 unsigned short type
,
1710 const void *daddr
, const void *saddr
,
1713 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1716 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1719 static inline int dev_parse_header(const struct sk_buff
*skb
,
1720 unsigned char *haddr
)
1722 const struct net_device
*dev
= skb
->dev
;
1724 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1726 return dev
->header_ops
->parse(skb
, haddr
);
1729 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1730 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1731 static inline int unregister_gifconf(unsigned int family
)
1733 return register_gifconf(family
, NULL
);
1737 * Incoming packets are placed on per-cpu queues
1739 struct softnet_data
{
1740 struct Qdisc
*output_queue
;
1741 struct Qdisc
**output_queue_tailp
;
1742 struct list_head poll_list
;
1743 struct sk_buff
*completion_queue
;
1744 struct sk_buff_head process_queue
;
1747 unsigned int processed
;
1748 unsigned int time_squeeze
;
1749 unsigned int cpu_collision
;
1750 unsigned int received_rps
;
1753 struct softnet_data
*rps_ipi_list
;
1755 /* Elements below can be accessed between CPUs for RPS */
1756 struct call_single_data csd ____cacheline_aligned_in_smp
;
1757 struct softnet_data
*rps_ipi_next
;
1759 unsigned int input_queue_head
;
1760 unsigned int input_queue_tail
;
1762 unsigned int dropped
;
1763 struct sk_buff_head input_pkt_queue
;
1764 struct napi_struct backlog
;
1767 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1770 sd
->input_queue_head
++;
1774 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1775 unsigned int *qtail
)
1778 *qtail
= ++sd
->input_queue_tail
;
1782 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1784 extern void __netif_schedule(struct Qdisc
*q
);
1786 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1788 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1789 __netif_schedule(txq
->qdisc
);
1792 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1796 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1797 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1800 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1802 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1806 * netif_start_queue - allow transmit
1807 * @dev: network device
1809 * Allow upper layers to call the device hard_start_xmit routine.
1811 static inline void netif_start_queue(struct net_device
*dev
)
1813 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1816 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1820 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1821 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1822 netif_tx_start_queue(txq
);
1826 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1828 #ifdef CONFIG_NETPOLL_TRAP
1829 if (netpoll_trap()) {
1830 netif_tx_start_queue(dev_queue
);
1834 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1835 __netif_schedule(dev_queue
->qdisc
);
1839 * netif_wake_queue - restart transmit
1840 * @dev: network device
1842 * Allow upper layers to call the device hard_start_xmit routine.
1843 * Used for flow control when transmit resources are available.
1845 static inline void netif_wake_queue(struct net_device
*dev
)
1847 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1850 static inline void netif_tx_wake_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_wake_queue(txq
);
1860 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1862 if (WARN_ON(!dev_queue
)) {
1863 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1866 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1870 * netif_stop_queue - stop transmitted packets
1871 * @dev: network device
1873 * Stop upper layers calling the device hard_start_xmit routine.
1874 * Used for flow control when transmit resources are unavailable.
1876 static inline void netif_stop_queue(struct net_device
*dev
)
1878 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1881 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1885 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1886 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1887 netif_tx_stop_queue(txq
);
1891 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1893 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1897 * netif_queue_stopped - test if transmit queue is flowblocked
1898 * @dev: network device
1900 * Test if transmit queue on device is currently unable to send.
1902 static inline bool netif_queue_stopped(const struct net_device
*dev
)
1904 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1907 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
1909 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
1912 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
1914 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
1917 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
1921 dql_queued(&dev_queue
->dql
, bytes
);
1923 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
1926 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1929 * The XOFF flag must be set before checking the dql_avail below,
1930 * because in netdev_tx_completed_queue we update the dql_completed
1931 * before checking the XOFF flag.
1935 /* check again in case another CPU has just made room avail */
1936 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
1937 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1941 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
1943 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
1946 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
1947 unsigned int pkts
, unsigned int bytes
)
1950 if (unlikely(!bytes
))
1953 dql_completed(&dev_queue
->dql
, bytes
);
1956 * Without the memory barrier there is a small possiblity that
1957 * netdev_tx_sent_queue will miss the update and cause the queue to
1958 * be stopped forever
1962 if (dql_avail(&dev_queue
->dql
) < 0)
1965 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
1966 netif_schedule_queue(dev_queue
);
1970 static inline void netdev_completed_queue(struct net_device
*dev
,
1971 unsigned int pkts
, unsigned int bytes
)
1973 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
1976 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
1979 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
1984 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
1986 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
1990 * netif_running - test if up
1991 * @dev: network device
1993 * Test if the device has been brought up.
1995 static inline bool netif_running(const struct net_device
*dev
)
1997 return test_bit(__LINK_STATE_START
, &dev
->state
);
2001 * Routines to manage the subqueues on a device. We only need start
2002 * stop, and a check if it's stopped. All other device management is
2003 * done at the overall netdevice level.
2004 * Also test the device if we're multiqueue.
2008 * netif_start_subqueue - allow sending packets on subqueue
2009 * @dev: network device
2010 * @queue_index: sub queue index
2012 * Start individual transmit queue of a device with multiple transmit queues.
2014 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2016 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2018 netif_tx_start_queue(txq
);
2022 * netif_stop_subqueue - stop sending packets on subqueue
2023 * @dev: network device
2024 * @queue_index: sub queue index
2026 * Stop individual transmit queue of a device with multiple transmit queues.
2028 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2030 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2031 #ifdef CONFIG_NETPOLL_TRAP
2035 netif_tx_stop_queue(txq
);
2039 * netif_subqueue_stopped - test status of subqueue
2040 * @dev: network device
2041 * @queue_index: sub queue index
2043 * Check individual transmit queue of a device with multiple transmit queues.
2045 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2048 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2050 return netif_tx_queue_stopped(txq
);
2053 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2054 struct sk_buff
*skb
)
2056 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2060 * netif_wake_subqueue - allow sending packets on subqueue
2061 * @dev: network device
2062 * @queue_index: sub queue index
2064 * Resume individual transmit queue of a device with multiple transmit queues.
2066 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2068 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2069 #ifdef CONFIG_NETPOLL_TRAP
2073 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2074 __netif_schedule(txq
->qdisc
);
2078 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2079 * as a distribution range limit for the returned value.
2081 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2082 const struct sk_buff
*skb
)
2084 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2088 * netif_is_multiqueue - test if device has multiple transmit queues
2089 * @dev: network device
2091 * Check if device has multiple transmit queues
2093 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2095 return dev
->num_tx_queues
> 1;
2098 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
2102 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
2105 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2112 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2113 const struct net_device
*from_dev
)
2117 err
= netif_set_real_num_tx_queues(to_dev
,
2118 from_dev
->real_num_tx_queues
);
2122 return netif_set_real_num_rx_queues(to_dev
,
2123 from_dev
->real_num_rx_queues
);
2129 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2130 extern int netif_get_num_default_rss_queues(void);
2132 /* Use this variant when it is known for sure that it
2133 * is executing from hardware interrupt context or with hardware interrupts
2136 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2138 /* Use this variant in places where it could be invoked
2139 * from either hardware interrupt or other context, with hardware interrupts
2140 * either disabled or enabled.
2142 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2144 extern int netif_rx(struct sk_buff
*skb
);
2145 extern int netif_rx_ni(struct sk_buff
*skb
);
2146 extern int netif_receive_skb(struct sk_buff
*skb
);
2147 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
2148 struct sk_buff
*skb
);
2149 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
2150 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2151 struct sk_buff
*skb
);
2152 extern void napi_gro_flush(struct napi_struct
*napi
);
2153 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2154 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
2155 struct sk_buff
*skb
,
2157 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2159 static inline void napi_free_frags(struct napi_struct
*napi
)
2161 kfree_skb(napi
->skb
);
2165 extern int netdev_rx_handler_register(struct net_device
*dev
,
2166 rx_handler_func_t
*rx_handler
,
2167 void *rx_handler_data
);
2168 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2170 extern bool dev_valid_name(const char *name
);
2171 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2172 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2173 extern unsigned int dev_get_flags(const struct net_device
*);
2174 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2175 extern int dev_change_flags(struct net_device
*, unsigned int);
2176 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2177 extern int dev_change_name(struct net_device
*, const char *);
2178 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2179 extern int dev_change_net_namespace(struct net_device
*,
2180 struct net
*, const char *);
2181 extern int dev_set_mtu(struct net_device
*, int);
2182 extern void dev_set_group(struct net_device
*, int);
2183 extern int dev_set_mac_address(struct net_device
*,
2185 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2186 struct net_device
*dev
,
2187 struct netdev_queue
*txq
);
2188 extern int dev_forward_skb(struct net_device
*dev
,
2189 struct sk_buff
*skb
);
2191 extern int netdev_budget
;
2193 /* Called by rtnetlink.c:rtnl_unlock() */
2194 extern void netdev_run_todo(void);
2197 * dev_put - release reference to device
2198 * @dev: network device
2200 * Release reference to device to allow it to be freed.
2202 static inline void dev_put(struct net_device
*dev
)
2204 this_cpu_dec(*dev
->pcpu_refcnt
);
2208 * dev_hold - get reference to device
2209 * @dev: network device
2211 * Hold reference to device to keep it from being freed.
2213 static inline void dev_hold(struct net_device
*dev
)
2215 this_cpu_inc(*dev
->pcpu_refcnt
);
2218 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2219 * and _off may be called from IRQ context, but it is caller
2220 * who is responsible for serialization of these calls.
2222 * The name carrier is inappropriate, these functions should really be
2223 * called netif_lowerlayer_*() because they represent the state of any
2224 * kind of lower layer not just hardware media.
2227 extern void linkwatch_fire_event(struct net_device
*dev
);
2228 extern void linkwatch_forget_dev(struct net_device
*dev
);
2231 * netif_carrier_ok - test if carrier present
2232 * @dev: network device
2234 * Check if carrier is present on device
2236 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2238 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2241 extern unsigned long dev_trans_start(struct net_device
*dev
);
2243 extern void __netdev_watchdog_up(struct net_device
*dev
);
2245 extern void netif_carrier_on(struct net_device
*dev
);
2247 extern void netif_carrier_off(struct net_device
*dev
);
2249 extern void netif_notify_peers(struct net_device
*dev
);
2252 * netif_dormant_on - mark device as dormant.
2253 * @dev: network device
2255 * Mark device as dormant (as per RFC2863).
2257 * The dormant state indicates that the relevant interface is not
2258 * actually in a condition to pass packets (i.e., it is not 'up') but is
2259 * in a "pending" state, waiting for some external event. For "on-
2260 * demand" interfaces, this new state identifies the situation where the
2261 * interface is waiting for events to place it in the up state.
2264 static inline void netif_dormant_on(struct net_device
*dev
)
2266 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2267 linkwatch_fire_event(dev
);
2271 * netif_dormant_off - set device as not dormant.
2272 * @dev: network device
2274 * Device is not in dormant state.
2276 static inline void netif_dormant_off(struct net_device
*dev
)
2278 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2279 linkwatch_fire_event(dev
);
2283 * netif_dormant - test if carrier present
2284 * @dev: network device
2286 * Check if carrier is present on device
2288 static inline bool netif_dormant(const struct net_device
*dev
)
2290 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2295 * netif_oper_up - test if device is operational
2296 * @dev: network device
2298 * Check if carrier is operational
2300 static inline bool netif_oper_up(const struct net_device
*dev
)
2302 return (dev
->operstate
== IF_OPER_UP
||
2303 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2307 * netif_device_present - is device available or removed
2308 * @dev: network device
2310 * Check if device has not been removed from system.
2312 static inline bool netif_device_present(struct net_device
*dev
)
2314 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2317 extern void netif_device_detach(struct net_device
*dev
);
2319 extern void netif_device_attach(struct net_device
*dev
);
2322 * Network interface message level settings
2326 NETIF_MSG_DRV
= 0x0001,
2327 NETIF_MSG_PROBE
= 0x0002,
2328 NETIF_MSG_LINK
= 0x0004,
2329 NETIF_MSG_TIMER
= 0x0008,
2330 NETIF_MSG_IFDOWN
= 0x0010,
2331 NETIF_MSG_IFUP
= 0x0020,
2332 NETIF_MSG_RX_ERR
= 0x0040,
2333 NETIF_MSG_TX_ERR
= 0x0080,
2334 NETIF_MSG_TX_QUEUED
= 0x0100,
2335 NETIF_MSG_INTR
= 0x0200,
2336 NETIF_MSG_TX_DONE
= 0x0400,
2337 NETIF_MSG_RX_STATUS
= 0x0800,
2338 NETIF_MSG_PKTDATA
= 0x1000,
2339 NETIF_MSG_HW
= 0x2000,
2340 NETIF_MSG_WOL
= 0x4000,
2343 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2344 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2345 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2346 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2347 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2348 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2349 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2350 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2351 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2352 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2353 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2354 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2355 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2356 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2357 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2359 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2362 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2363 return default_msg_enable_bits
;
2364 if (debug_value
== 0) /* no output */
2366 /* set low N bits */
2367 return (1 << debug_value
) - 1;
2370 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2372 spin_lock(&txq
->_xmit_lock
);
2373 txq
->xmit_lock_owner
= cpu
;
2376 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2378 spin_lock_bh(&txq
->_xmit_lock
);
2379 txq
->xmit_lock_owner
= smp_processor_id();
2382 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2384 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2386 txq
->xmit_lock_owner
= smp_processor_id();
2390 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2392 txq
->xmit_lock_owner
= -1;
2393 spin_unlock(&txq
->_xmit_lock
);
2396 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2398 txq
->xmit_lock_owner
= -1;
2399 spin_unlock_bh(&txq
->_xmit_lock
);
2402 static inline void txq_trans_update(struct netdev_queue
*txq
)
2404 if (txq
->xmit_lock_owner
!= -1)
2405 txq
->trans_start
= jiffies
;
2409 * netif_tx_lock - grab network device transmit lock
2410 * @dev: network device
2412 * Get network device transmit lock
2414 static inline void netif_tx_lock(struct net_device
*dev
)
2419 spin_lock(&dev
->tx_global_lock
);
2420 cpu
= smp_processor_id();
2421 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2422 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2424 /* We are the only thread of execution doing a
2425 * freeze, but we have to grab the _xmit_lock in
2426 * order to synchronize with threads which are in
2427 * the ->hard_start_xmit() handler and already
2428 * checked the frozen bit.
2430 __netif_tx_lock(txq
, cpu
);
2431 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2432 __netif_tx_unlock(txq
);
2436 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2442 static inline void netif_tx_unlock(struct net_device
*dev
)
2446 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2447 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2449 /* No need to grab the _xmit_lock here. If the
2450 * queue is not stopped for another reason, we
2453 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2454 netif_schedule_queue(txq
);
2456 spin_unlock(&dev
->tx_global_lock
);
2459 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2461 netif_tx_unlock(dev
);
2465 #define HARD_TX_LOCK(dev, txq, cpu) { \
2466 if ((dev->features & NETIF_F_LLTX) == 0) { \
2467 __netif_tx_lock(txq, cpu); \
2471 #define HARD_TX_UNLOCK(dev, txq) { \
2472 if ((dev->features & NETIF_F_LLTX) == 0) { \
2473 __netif_tx_unlock(txq); \
2477 static inline void netif_tx_disable(struct net_device
*dev
)
2483 cpu
= smp_processor_id();
2484 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2485 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2487 __netif_tx_lock(txq
, cpu
);
2488 netif_tx_stop_queue(txq
);
2489 __netif_tx_unlock(txq
);
2494 static inline void netif_addr_lock(struct net_device
*dev
)
2496 spin_lock(&dev
->addr_list_lock
);
2499 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2501 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2504 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2506 spin_lock_bh(&dev
->addr_list_lock
);
2509 static inline void netif_addr_unlock(struct net_device
*dev
)
2511 spin_unlock(&dev
->addr_list_lock
);
2514 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2516 spin_unlock_bh(&dev
->addr_list_lock
);
2520 * dev_addrs walker. Should be used only for read access. Call with
2521 * rcu_read_lock held.
2523 #define for_each_dev_addr(dev, ha) \
2524 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2526 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2528 extern void ether_setup(struct net_device
*dev
);
2530 /* Support for loadable net-drivers */
2531 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2532 void (*setup
)(struct net_device
*),
2533 unsigned int txqs
, unsigned int rxqs
);
2534 #define alloc_netdev(sizeof_priv, name, setup) \
2535 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2537 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2538 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2540 extern int register_netdev(struct net_device
*dev
);
2541 extern void unregister_netdev(struct net_device
*dev
);
2543 /* General hardware address lists handling functions */
2544 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2545 struct netdev_hw_addr_list
*from_list
,
2546 int addr_len
, unsigned char addr_type
);
2547 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2548 struct netdev_hw_addr_list
*from_list
,
2549 int addr_len
, unsigned char addr_type
);
2550 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2551 struct netdev_hw_addr_list
*from_list
,
2553 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2554 struct netdev_hw_addr_list
*from_list
,
2556 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2557 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2559 /* Functions used for device addresses handling */
2560 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2561 unsigned char addr_type
);
2562 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2563 unsigned char addr_type
);
2564 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2565 struct net_device
*from_dev
,
2566 unsigned char addr_type
);
2567 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2568 struct net_device
*from_dev
,
2569 unsigned char addr_type
);
2570 extern void dev_addr_flush(struct net_device
*dev
);
2571 extern int dev_addr_init(struct net_device
*dev
);
2573 /* Functions used for unicast addresses handling */
2574 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2575 extern int dev_uc_add_excl(struct net_device
*dev
, unsigned char *addr
);
2576 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2577 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2578 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2579 extern void dev_uc_flush(struct net_device
*dev
);
2580 extern void dev_uc_init(struct net_device
*dev
);
2582 /* Functions used for multicast addresses handling */
2583 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2584 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2585 extern int dev_mc_add_excl(struct net_device
*dev
, unsigned char *addr
);
2586 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2587 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2588 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2589 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2590 extern void dev_mc_flush(struct net_device
*dev
);
2591 extern void dev_mc_init(struct net_device
*dev
);
2593 /* Functions used for secondary unicast and multicast support */
2594 extern void dev_set_rx_mode(struct net_device
*dev
);
2595 extern void __dev_set_rx_mode(struct net_device
*dev
);
2596 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2597 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2598 extern void netdev_state_change(struct net_device
*dev
);
2599 extern int netdev_bonding_change(struct net_device
*dev
,
2600 unsigned long event
);
2601 extern void netdev_features_change(struct net_device
*dev
);
2602 /* Load a device via the kmod */
2603 extern void dev_load(struct net
*net
, const char *name
);
2604 extern void dev_mcast_init(void);
2605 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2606 struct rtnl_link_stats64
*storage
);
2607 extern void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
2608 const struct net_device_stats
*netdev_stats
);
2610 extern int netdev_max_backlog
;
2611 extern int netdev_tstamp_prequeue
;
2612 extern int weight_p
;
2613 extern int bpf_jit_enable
;
2614 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2615 extern int netdev_set_bond_master(struct net_device
*dev
,
2616 struct net_device
*master
);
2617 extern int skb_checksum_help(struct sk_buff
*skb
);
2618 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
,
2619 netdev_features_t features
);
2621 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2623 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2627 /* rx skb timestamps */
2628 extern void net_enable_timestamp(void);
2629 extern void net_disable_timestamp(void);
2631 #ifdef CONFIG_PROC_FS
2632 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2633 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2634 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2637 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2638 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2640 extern struct kobj_ns_type_operations net_ns_type_operations
;
2642 extern const char *netdev_drivername(const struct net_device
*dev
);
2644 extern void linkwatch_run_queue(void);
2646 static inline netdev_features_t
netdev_get_wanted_features(
2647 struct net_device
*dev
)
2649 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2651 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2652 netdev_features_t one
, netdev_features_t mask
);
2653 int __netdev_update_features(struct net_device
*dev
);
2654 void netdev_update_features(struct net_device
*dev
);
2655 void netdev_change_features(struct net_device
*dev
);
2657 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2658 struct net_device
*dev
);
2660 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2662 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
2664 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2666 /* check flags correspondence */
2667 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2668 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2669 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2670 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2671 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2672 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2674 return (features
& feature
) == feature
;
2677 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2679 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2680 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2683 static inline bool netif_needs_gso(struct sk_buff
*skb
,
2684 netdev_features_t features
)
2686 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2687 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
2688 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
2691 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2694 dev
->gso_max_size
= size
;
2697 static inline bool netif_is_bond_slave(struct net_device
*dev
)
2699 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2702 static inline bool netif_supports_nofcs(struct net_device
*dev
)
2704 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
2707 extern struct pernet_operations __net_initdata loopback_net_ops
;
2709 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2711 /* netdev_printk helpers, similar to dev_printk */
2713 static inline const char *netdev_name(const struct net_device
*dev
)
2715 if (dev
->reg_state
!= NETREG_REGISTERED
)
2716 return "(unregistered net_device)";
2720 extern int __netdev_printk(const char *level
, const struct net_device
*dev
,
2721 struct va_format
*vaf
);
2723 extern __printf(3, 4)
2724 int netdev_printk(const char *level
, const struct net_device
*dev
,
2725 const char *format
, ...);
2726 extern __printf(2, 3)
2727 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2728 extern __printf(2, 3)
2729 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2730 extern __printf(2, 3)
2731 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2732 extern __printf(2, 3)
2733 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2734 extern __printf(2, 3)
2735 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2736 extern __printf(2, 3)
2737 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2738 extern __printf(2, 3)
2739 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2741 #define MODULE_ALIAS_NETDEV(device) \
2742 MODULE_ALIAS("netdev-" device)
2744 #if defined(CONFIG_DYNAMIC_DEBUG)
2745 #define netdev_dbg(__dev, format, args...) \
2747 dynamic_netdev_dbg(__dev, format, ##args); \
2749 #elif defined(DEBUG)
2750 #define netdev_dbg(__dev, format, args...) \
2751 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2753 #define netdev_dbg(__dev, format, args...) \
2756 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2761 #if defined(VERBOSE_DEBUG)
2762 #define netdev_vdbg netdev_dbg
2765 #define netdev_vdbg(dev, format, args...) \
2768 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2774 * netdev_WARN() acts like dev_printk(), but with the key difference
2775 * of using a WARN/WARN_ON to get the message out, including the
2776 * file/line information and a backtrace.
2778 #define netdev_WARN(dev, format, args...) \
2779 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2781 /* netif printk helpers, similar to netdev_printk */
2783 #define netif_printk(priv, type, level, dev, fmt, args...) \
2785 if (netif_msg_##type(priv)) \
2786 netdev_printk(level, (dev), fmt, ##args); \
2789 #define netif_level(level, priv, type, dev, fmt, args...) \
2791 if (netif_msg_##type(priv)) \
2792 netdev_##level(dev, fmt, ##args); \
2795 #define netif_emerg(priv, type, dev, fmt, args...) \
2796 netif_level(emerg, priv, type, dev, fmt, ##args)
2797 #define netif_alert(priv, type, dev, fmt, args...) \
2798 netif_level(alert, priv, type, dev, fmt, ##args)
2799 #define netif_crit(priv, type, dev, fmt, args...) \
2800 netif_level(crit, priv, type, dev, fmt, ##args)
2801 #define netif_err(priv, type, dev, fmt, args...) \
2802 netif_level(err, priv, type, dev, fmt, ##args)
2803 #define netif_warn(priv, type, dev, fmt, args...) \
2804 netif_level(warn, priv, type, dev, fmt, ##args)
2805 #define netif_notice(priv, type, dev, fmt, args...) \
2806 netif_level(notice, priv, type, dev, fmt, ##args)
2807 #define netif_info(priv, type, dev, fmt, args...) \
2808 netif_level(info, priv, type, dev, fmt, ##args)
2810 #if defined(CONFIG_DYNAMIC_DEBUG)
2811 #define netif_dbg(priv, type, netdev, format, args...) \
2813 if (netif_msg_##type(priv)) \
2814 dynamic_netdev_dbg(netdev, format, ##args); \
2816 #elif defined(DEBUG)
2817 #define netif_dbg(priv, type, dev, format, args...) \
2818 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2820 #define netif_dbg(priv, type, dev, format, args...) \
2823 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2828 #if defined(VERBOSE_DEBUG)
2829 #define netif_vdbg netif_dbg
2831 #define netif_vdbg(priv, type, dev, format, args...) \
2834 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2839 #endif /* __KERNEL__ */
2841 #endif /* _LINUX_NETDEVICE_H */