2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31 #include <linux/if_link.h>
34 #include <linux/pm_qos.h>
35 #include <linux/timer.h>
36 #include <linux/delay.h>
37 #include <linux/atomic.h>
38 #include <asm/cache.h>
39 #include <asm/byteorder.h>
41 #include <linux/device.h>
42 #include <linux/percpu.h>
43 #include <linux/rculist.h>
44 #include <linux/dmaengine.h>
45 #include <linux/workqueue.h>
47 #include <linux/ethtool.h>
48 #include <net/net_namespace.h>
51 #include <net/dcbnl.h>
53 #include <net/netprio_cgroup.h>
55 #include <linux/netdev_features.h>
62 /* source back-compat hooks */
63 #define SET_ETHTOOL_OPS(netdev,ops) \
64 ( (netdev)->ethtool_ops = (ops) )
66 /* hardware address assignment types */
67 #define NET_ADDR_PERM 0 /* address is permanent (default) */
68 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
69 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
76 * Transmit return codes: transmit return codes originate from three different
79 * - qdisc return codes
80 * - driver transmit return codes
83 * Drivers are allowed to return any one of those in their hard_start_xmit()
84 * function. Real network devices commonly used with qdiscs should only return
85 * the driver transmit return codes though - when qdiscs are used, the actual
86 * transmission happens asynchronously, so the value is not propagated to
87 * higher layers. Virtual network devices transmit synchronously, in this case
88 * the driver transmit return codes are consumed by dev_queue_xmit(), all
89 * others are propagated to higher layers.
92 /* qdisc ->enqueue() return codes. */
93 #define NET_XMIT_SUCCESS 0x00
94 #define NET_XMIT_DROP 0x01 /* skb dropped */
95 #define NET_XMIT_CN 0x02 /* congestion notification */
96 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
97 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
99 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
100 * indicates that the device will soon be dropping packets, or already drops
101 * some packets of the same priority; prompting us to send less aggressively. */
102 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
103 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
105 /* Driver transmit return codes */
106 #define NETDEV_TX_MASK 0xf0
109 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
110 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
111 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
112 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
114 typedef enum netdev_tx netdev_tx_t
;
117 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
118 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
120 static inline bool dev_xmit_complete(int rc
)
123 * Positive cases with an skb consumed by a driver:
124 * - successful transmission (rc == NETDEV_TX_OK)
125 * - error while transmitting (rc < 0)
126 * - error while queueing to a different device (rc & NET_XMIT_MASK)
128 if (likely(rc
< NET_XMIT_MASK
))
136 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
138 /* Initial net device group. All devices belong to group 0 by default. */
139 #define INIT_NETDEV_GROUP 0
143 * Compute the worst case header length according to the protocols
147 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
148 # if defined(CONFIG_MAC80211_MESH)
149 # define LL_MAX_HEADER 128
151 # define LL_MAX_HEADER 96
153 #elif IS_ENABLED(CONFIG_TR)
154 # define LL_MAX_HEADER 48
156 # define LL_MAX_HEADER 32
159 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
160 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
161 #define MAX_HEADER LL_MAX_HEADER
163 #define MAX_HEADER (LL_MAX_HEADER + 48)
167 * Old network device statistics. Fields are native words
168 * (unsigned long) so they can be read and written atomically.
171 struct net_device_stats
{
172 unsigned long rx_packets
;
173 unsigned long tx_packets
;
174 unsigned long rx_bytes
;
175 unsigned long tx_bytes
;
176 unsigned long rx_errors
;
177 unsigned long tx_errors
;
178 unsigned long rx_dropped
;
179 unsigned long tx_dropped
;
180 unsigned long multicast
;
181 unsigned long collisions
;
182 unsigned long rx_length_errors
;
183 unsigned long rx_over_errors
;
184 unsigned long rx_crc_errors
;
185 unsigned long rx_frame_errors
;
186 unsigned long rx_fifo_errors
;
187 unsigned long rx_missed_errors
;
188 unsigned long tx_aborted_errors
;
189 unsigned long tx_carrier_errors
;
190 unsigned long tx_fifo_errors
;
191 unsigned long tx_heartbeat_errors
;
192 unsigned long tx_window_errors
;
193 unsigned long rx_compressed
;
194 unsigned long tx_compressed
;
197 #endif /* __KERNEL__ */
200 /* Media selection options. */
213 #include <linux/cache.h>
214 #include <linux/skbuff.h>
217 #include <linux/jump_label.h>
218 extern struct jump_label_key rps_needed
;
225 struct netdev_hw_addr
{
226 struct list_head list
;
227 unsigned char addr
[MAX_ADDR_LEN
];
229 #define NETDEV_HW_ADDR_T_LAN 1
230 #define NETDEV_HW_ADDR_T_SAN 2
231 #define NETDEV_HW_ADDR_T_SLAVE 3
232 #define NETDEV_HW_ADDR_T_UNICAST 4
233 #define NETDEV_HW_ADDR_T_MULTICAST 5
237 struct rcu_head rcu_head
;
240 struct netdev_hw_addr_list
{
241 struct list_head list
;
245 #define netdev_hw_addr_list_count(l) ((l)->count)
246 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
247 #define netdev_hw_addr_list_for_each(ha, l) \
248 list_for_each_entry(ha, &(l)->list, list)
250 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
251 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
252 #define netdev_for_each_uc_addr(ha, dev) \
253 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
255 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
256 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
257 #define netdev_for_each_mc_addr(ha, dev) \
258 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
265 /* cached hardware header; allow for machine alignment needs. */
266 #define HH_DATA_MOD 16
267 #define HH_DATA_OFF(__len) \
268 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
269 #define HH_DATA_ALIGN(__len) \
270 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
271 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
274 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
276 * dev->hard_header_len ? (dev->hard_header_len +
277 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
279 * We could use other alignment values, but we must maintain the
280 * relationship HH alignment <= LL alignment.
282 #define LL_RESERVED_SPACE(dev) \
283 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
284 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
285 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
288 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
289 unsigned short type
, const void *daddr
,
290 const void *saddr
, unsigned len
);
291 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
292 int (*rebuild
)(struct sk_buff
*skb
);
293 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
294 void (*cache_update
)(struct hh_cache
*hh
,
295 const struct net_device
*dev
,
296 const unsigned char *haddr
);
299 /* These flag bits are private to the generic network queueing
300 * layer, they may not be explicitly referenced by any other
304 enum netdev_state_t
{
306 __LINK_STATE_PRESENT
,
307 __LINK_STATE_NOCARRIER
,
308 __LINK_STATE_LINKWATCH_PENDING
,
309 __LINK_STATE_DORMANT
,
314 * This structure holds at boot time configured netdevice settings. They
315 * are then used in the device probing.
317 struct netdev_boot_setup
{
321 #define NETDEV_BOOT_SETUP_MAX 8
323 extern int __init
netdev_boot_setup(char *str
);
326 * Structure for NAPI scheduling similar to tasklet but with weighting
329 /* The poll_list must only be managed by the entity which
330 * changes the state of the NAPI_STATE_SCHED bit. This means
331 * whoever atomically sets that bit can add this napi_struct
332 * to the per-cpu poll_list, and whoever clears that bit
333 * can remove from the list right before clearing the bit.
335 struct list_head poll_list
;
339 int (*poll
)(struct napi_struct
*, int);
340 #ifdef CONFIG_NETPOLL
341 spinlock_t poll_lock
;
345 unsigned int gro_count
;
347 struct net_device
*dev
;
348 struct list_head dev_list
;
349 struct sk_buff
*gro_list
;
354 NAPI_STATE_SCHED
, /* Poll is scheduled */
355 NAPI_STATE_DISABLE
, /* Disable pending */
356 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
366 typedef enum gro_result gro_result_t
;
369 * enum rx_handler_result - Possible return values for rx_handlers.
370 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
372 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
373 * case skb->dev was changed by rx_handler.
374 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
375 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
377 * rx_handlers are functions called from inside __netif_receive_skb(), to do
378 * special processing of the skb, prior to delivery to protocol handlers.
380 * Currently, a net_device can only have a single rx_handler registered. Trying
381 * to register a second rx_handler will return -EBUSY.
383 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
384 * To unregister a rx_handler on a net_device, use
385 * netdev_rx_handler_unregister().
387 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
390 * If the rx_handler consumed to skb in some way, it should return
391 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
392 * the skb to be delivered in some other ways.
394 * If the rx_handler changed skb->dev, to divert the skb to another
395 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
396 * new device will be called if it exists.
398 * If the rx_handler consider the skb should be ignored, it should return
399 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
400 * are registred on exact device (ptype->dev == skb->dev).
402 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
403 * delivered, it should return RX_HANDLER_PASS.
405 * A device without a registered rx_handler will behave as if rx_handler
406 * returned RX_HANDLER_PASS.
409 enum rx_handler_result
{
415 typedef enum rx_handler_result rx_handler_result_t
;
416 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
418 extern void __napi_schedule(struct napi_struct
*n
);
420 static inline int napi_disable_pending(struct napi_struct
*n
)
422 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
426 * napi_schedule_prep - check if napi can be scheduled
429 * Test if NAPI routine is already running, and if not mark
430 * it as running. This is used as a condition variable
431 * insure only one NAPI poll instance runs. We also make
432 * sure there is no pending NAPI disable.
434 static inline int napi_schedule_prep(struct napi_struct
*n
)
436 return !napi_disable_pending(n
) &&
437 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
441 * napi_schedule - schedule NAPI poll
444 * Schedule NAPI poll routine to be called if it is not already
447 static inline void napi_schedule(struct napi_struct
*n
)
449 if (napi_schedule_prep(n
))
453 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
454 static inline int napi_reschedule(struct napi_struct
*napi
)
456 if (napi_schedule_prep(napi
)) {
457 __napi_schedule(napi
);
464 * napi_complete - NAPI processing complete
467 * Mark NAPI processing as complete.
469 extern void __napi_complete(struct napi_struct
*n
);
470 extern void napi_complete(struct napi_struct
*n
);
473 * napi_disable - prevent NAPI from scheduling
476 * Stop NAPI from being scheduled on this context.
477 * Waits till any outstanding processing completes.
479 static inline void napi_disable(struct napi_struct
*n
)
481 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
482 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
484 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
488 * napi_enable - enable NAPI scheduling
491 * Resume NAPI from being scheduled on this context.
492 * Must be paired with napi_disable.
494 static inline void napi_enable(struct napi_struct
*n
)
496 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
497 smp_mb__before_clear_bit();
498 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
503 * napi_synchronize - wait until NAPI is not running
506 * Wait until NAPI is done being scheduled on this context.
507 * Waits till any outstanding processing completes but
508 * does not disable future activations.
510 static inline void napi_synchronize(const struct napi_struct
*n
)
512 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
516 # define napi_synchronize(n) barrier()
519 enum netdev_queue_state_t
{
520 __QUEUE_STATE_DRV_XOFF
,
521 __QUEUE_STATE_STACK_XOFF
,
522 __QUEUE_STATE_FROZEN
,
523 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
524 (1 << __QUEUE_STATE_STACK_XOFF))
525 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
526 (1 << __QUEUE_STATE_FROZEN))
529 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
530 * netif_tx_* functions below are used to manipulate this flag. The
531 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
532 * queue independently. The netif_xmit_*stopped functions below are called
533 * to check if the queue has been stopped by the driver or stack (either
534 * of the XOFF bits are set in the state). Drivers should not need to call
535 * netif_xmit*stopped functions, they should only be using netif_tx_*.
538 struct netdev_queue
{
542 struct net_device
*dev
;
545 struct Qdisc
*qdisc_sleeping
;
549 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
555 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
558 * please use this field instead of dev->trans_start
560 unsigned long trans_start
;
563 * Number of TX timeouts for this queue
564 * (/sys/class/net/DEV/Q/trans_timeout)
566 unsigned long trans_timeout
;
567 } ____cacheline_aligned_in_smp
;
569 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
571 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
578 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
580 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
587 * This structure holds an RPS map which can be of variable length. The
588 * map is an array of CPUs.
595 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
598 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
599 * tail pointer for that CPU's input queue at the time of last enqueue, and
600 * a hardware filter index.
602 struct rps_dev_flow
{
605 unsigned int last_qtail
;
607 #define RPS_NO_FILTER 0xffff
610 * The rps_dev_flow_table structure contains a table of flow mappings.
612 struct rps_dev_flow_table
{
615 struct work_struct free_work
;
616 struct rps_dev_flow flows
[0];
618 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
619 (_num * sizeof(struct rps_dev_flow)))
622 * The rps_sock_flow_table contains mappings of flows to the last CPU
623 * on which they were processed by the application (set in recvmsg).
625 struct rps_sock_flow_table
{
629 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
630 (_num * sizeof(u16)))
632 #define RPS_NO_CPU 0xffff
634 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
638 unsigned int cpu
, index
= hash
& table
->mask
;
640 /* We only give a hint, preemption can change cpu under us */
641 cpu
= raw_smp_processor_id();
643 if (table
->ents
[index
] != cpu
)
644 table
->ents
[index
] = cpu
;
648 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
652 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
655 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
657 #ifdef CONFIG_RFS_ACCEL
658 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
659 u32 flow_id
, u16 filter_id
);
662 /* This structure contains an instance of an RX queue. */
663 struct netdev_rx_queue
{
664 struct rps_map __rcu
*rps_map
;
665 struct rps_dev_flow_table __rcu
*rps_flow_table
;
667 struct net_device
*dev
;
668 } ____cacheline_aligned_in_smp
;
669 #endif /* CONFIG_RPS */
673 * This structure holds an XPS map which can be of variable length. The
674 * map is an array of queues.
678 unsigned int alloc_len
;
682 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
683 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
687 * This structure holds all XPS maps for device. Maps are indexed by CPU.
689 struct xps_dev_maps
{
691 struct xps_map __rcu
*cpu_map
[0];
693 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
694 (nr_cpu_ids * sizeof(struct xps_map *)))
695 #endif /* CONFIG_XPS */
697 #define TC_MAX_QUEUE 16
698 #define TC_BITMASK 15
699 /* HW offloaded queuing disciplines txq count and offset maps */
700 struct netdev_tc_txq
{
706 * This structure defines the management hooks for network devices.
707 * The following hooks can be defined; unless noted otherwise, they are
708 * optional and can be filled with a null pointer.
710 * int (*ndo_init)(struct net_device *dev);
711 * This function is called once when network device is registered.
712 * The network device can use this to any late stage initializaton
713 * or semantic validattion. It can fail with an error code which will
714 * be propogated back to register_netdev
716 * void (*ndo_uninit)(struct net_device *dev);
717 * This function is called when device is unregistered or when registration
718 * fails. It is not called if init fails.
720 * int (*ndo_open)(struct net_device *dev);
721 * This function is called when network device transistions to the up
724 * int (*ndo_stop)(struct net_device *dev);
725 * This function is called when network device transistions to the down
728 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
729 * struct net_device *dev);
730 * Called when a packet needs to be transmitted.
731 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
732 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
733 * Required can not be NULL.
735 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
736 * Called to decide which queue to when device supports multiple
739 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
740 * This function is called to allow device receiver to make
741 * changes to configuration when multicast or promiscious is enabled.
743 * void (*ndo_set_rx_mode)(struct net_device *dev);
744 * This function is called device changes address list filtering.
745 * If driver handles unicast address filtering, it should set
746 * IFF_UNICAST_FLT to its priv_flags.
748 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
749 * This function is called when the Media Access Control address
750 * needs to be changed. If this interface is not defined, the
751 * mac address can not be changed.
753 * int (*ndo_validate_addr)(struct net_device *dev);
754 * Test if Media Access Control address is valid for the device.
756 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
757 * Called when a user request an ioctl which can't be handled by
758 * the generic interface code. If not defined ioctl's return
759 * not supported error code.
761 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
762 * Used to set network devices bus interface parameters. This interface
763 * is retained for legacy reason, new devices should use the bus
764 * interface (PCI) for low level management.
766 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
767 * Called when a user wants to change the Maximum Transfer Unit
768 * of a device. If not defined, any request to change MTU will
769 * will return an error.
771 * void (*ndo_tx_timeout)(struct net_device *dev);
772 * Callback uses when the transmitter has not made any progress
773 * for dev->watchdog ticks.
775 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
776 * struct rtnl_link_stats64 *storage);
777 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
778 * Called when a user wants to get the network device usage
779 * statistics. Drivers must do one of the following:
780 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
781 * rtnl_link_stats64 structure passed by the caller.
782 * 2. Define @ndo_get_stats to update a net_device_stats structure
783 * (which should normally be dev->stats) and return a pointer to
784 * it. The structure may be changed asynchronously only if each
785 * field is written atomically.
786 * 3. Update dev->stats asynchronously and atomically, and define
789 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
790 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
791 * this function is called when a VLAN id is registered.
793 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
794 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
795 * this function is called when a VLAN id is unregistered.
797 * void (*ndo_poll_controller)(struct net_device *dev);
799 * SR-IOV management functions.
800 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
801 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
802 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
803 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
804 * int (*ndo_get_vf_config)(struct net_device *dev,
805 * int vf, struct ifla_vf_info *ivf);
806 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
807 * struct nlattr *port[]);
808 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
809 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
810 * Called to setup 'tc' number of traffic classes in the net device. This
811 * is always called from the stack with the rtnl lock held and netif tx
812 * queues stopped. This allows the netdevice to perform queue management
815 * Fiber Channel over Ethernet (FCoE) offload functions.
816 * int (*ndo_fcoe_enable)(struct net_device *dev);
817 * Called when the FCoE protocol stack wants to start using LLD for FCoE
818 * so the underlying device can perform whatever needed configuration or
819 * initialization to support acceleration of FCoE traffic.
821 * int (*ndo_fcoe_disable)(struct net_device *dev);
822 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
823 * so the underlying device can perform whatever needed clean-ups to
824 * stop supporting acceleration of FCoE traffic.
826 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
827 * struct scatterlist *sgl, unsigned int sgc);
828 * Called when the FCoE Initiator wants to initialize an I/O that
829 * is a possible candidate for Direct Data Placement (DDP). The LLD can
830 * perform necessary setup and returns 1 to indicate the device is set up
831 * successfully to perform DDP on this I/O, otherwise this returns 0.
833 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
834 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
835 * indicated by the FC exchange id 'xid', so the underlying device can
836 * clean up and reuse resources for later DDP requests.
838 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
839 * struct scatterlist *sgl, unsigned int sgc);
840 * Called when the FCoE Target wants to initialize an I/O that
841 * is a possible candidate for Direct Data Placement (DDP). The LLD can
842 * perform necessary setup and returns 1 to indicate the device is set up
843 * successfully to perform DDP on this I/O, otherwise this returns 0.
845 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
846 * Called when the underlying device wants to override default World Wide
847 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
848 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
849 * protocol stack to use.
852 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
853 * u16 rxq_index, u32 flow_id);
854 * Set hardware filter for RFS. rxq_index is the target queue index;
855 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
856 * Return the filter ID on success, or a negative error code.
858 * Slave management functions (for bridge, bonding, etc). User should
859 * call netdev_set_master() to set dev->master properly.
860 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
861 * Called to make another netdev an underling.
863 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
864 * Called to release previously enslaved netdev.
866 * Feature/offload setting functions.
867 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
868 * netdev_features_t features);
869 * Adjusts the requested feature flags according to device-specific
870 * constraints, and returns the resulting flags. Must not modify
873 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
874 * Called to update device configuration to new features. Passed
875 * feature set might be less than what was returned by ndo_fix_features()).
876 * Must return >0 or -errno if it changed dev->features itself.
879 struct net_device_ops
{
880 int (*ndo_init
)(struct net_device
*dev
);
881 void (*ndo_uninit
)(struct net_device
*dev
);
882 int (*ndo_open
)(struct net_device
*dev
);
883 int (*ndo_stop
)(struct net_device
*dev
);
884 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
885 struct net_device
*dev
);
886 u16 (*ndo_select_queue
)(struct net_device
*dev
,
887 struct sk_buff
*skb
);
888 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
890 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
891 int (*ndo_set_mac_address
)(struct net_device
*dev
,
893 int (*ndo_validate_addr
)(struct net_device
*dev
);
894 int (*ndo_do_ioctl
)(struct net_device
*dev
,
895 struct ifreq
*ifr
, int cmd
);
896 int (*ndo_set_config
)(struct net_device
*dev
,
898 int (*ndo_change_mtu
)(struct net_device
*dev
,
900 int (*ndo_neigh_setup
)(struct net_device
*dev
,
901 struct neigh_parms
*);
902 void (*ndo_tx_timeout
) (struct net_device
*dev
);
904 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
905 struct rtnl_link_stats64
*storage
);
906 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
908 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
910 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
912 #ifdef CONFIG_NET_POLL_CONTROLLER
913 void (*ndo_poll_controller
)(struct net_device
*dev
);
914 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
915 struct netpoll_info
*info
);
916 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
918 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
920 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
921 int queue
, u16 vlan
, u8 qos
);
922 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
924 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
925 int vf
, bool setting
);
926 int (*ndo_get_vf_config
)(struct net_device
*dev
,
928 struct ifla_vf_info
*ivf
);
929 int (*ndo_set_vf_port
)(struct net_device
*dev
,
931 struct nlattr
*port
[]);
932 int (*ndo_get_vf_port
)(struct net_device
*dev
,
933 int vf
, struct sk_buff
*skb
);
934 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
935 #if IS_ENABLED(CONFIG_FCOE)
936 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
937 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
938 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
940 struct scatterlist
*sgl
,
942 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
944 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
946 struct scatterlist
*sgl
,
950 #if IS_ENABLED(CONFIG_LIBFCOE)
951 #define NETDEV_FCOE_WWNN 0
952 #define NETDEV_FCOE_WWPN 1
953 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
957 #ifdef CONFIG_RFS_ACCEL
958 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
959 const struct sk_buff
*skb
,
963 int (*ndo_add_slave
)(struct net_device
*dev
,
964 struct net_device
*slave_dev
);
965 int (*ndo_del_slave
)(struct net_device
*dev
,
966 struct net_device
*slave_dev
);
967 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
968 netdev_features_t features
);
969 int (*ndo_set_features
)(struct net_device
*dev
,
970 netdev_features_t features
);
974 * The DEVICE structure.
975 * Actually, this whole structure is a big mistake. It mixes I/O
976 * data with strictly "high-level" data, and it has to know about
977 * almost every data structure used in the INET module.
979 * FIXME: cleanup struct net_device such that network protocol info
986 * This is the first field of the "visible" part of this structure
987 * (i.e. as seen by users in the "Space.c" file). It is the name
992 struct pm_qos_request pm_qos_req
;
994 /* device name hash chain */
995 struct hlist_node name_hlist
;
1000 * I/O specific fields
1001 * FIXME: Merge these and struct ifmap into one
1003 unsigned long mem_end
; /* shared mem end */
1004 unsigned long mem_start
; /* shared mem start */
1005 unsigned long base_addr
; /* device I/O address */
1006 unsigned int irq
; /* device IRQ number */
1009 * Some hardware also needs these fields, but they are not
1010 * part of the usual set specified in Space.c.
1013 unsigned long state
;
1015 struct list_head dev_list
;
1016 struct list_head napi_list
;
1017 struct list_head unreg_list
;
1019 /* currently active device features */
1020 netdev_features_t features
;
1021 /* user-changeable features */
1022 netdev_features_t hw_features
;
1023 /* user-requested features */
1024 netdev_features_t wanted_features
;
1025 /* mask of features inheritable by VLAN devices */
1026 netdev_features_t vlan_features
;
1028 /* Interface index. Unique device identifier */
1032 struct net_device_stats stats
;
1033 atomic_long_t rx_dropped
; /* dropped packets by core network
1034 * Do not use this in drivers.
1037 #ifdef CONFIG_WIRELESS_EXT
1038 /* List of functions to handle Wireless Extensions (instead of ioctl).
1039 * See <net/iw_handler.h> for details. Jean II */
1040 const struct iw_handler_def
* wireless_handlers
;
1041 /* Instance data managed by the core of Wireless Extensions. */
1042 struct iw_public_data
* wireless_data
;
1044 /* Management operations */
1045 const struct net_device_ops
*netdev_ops
;
1046 const struct ethtool_ops
*ethtool_ops
;
1048 /* Hardware header description */
1049 const struct header_ops
*header_ops
;
1051 unsigned int flags
; /* interface flags (a la BSD) */
1052 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace. */
1053 unsigned short gflags
;
1054 unsigned short padded
; /* How much padding added by alloc_netdev() */
1056 unsigned char operstate
; /* RFC2863 operstate */
1057 unsigned char link_mode
; /* mapping policy to operstate */
1059 unsigned char if_port
; /* Selectable AUI, TP,..*/
1060 unsigned char dma
; /* DMA channel */
1062 unsigned int mtu
; /* interface MTU value */
1063 unsigned short type
; /* interface hardware type */
1064 unsigned short hard_header_len
; /* hardware hdr length */
1066 /* extra head- and tailroom the hardware may need, but not in all cases
1067 * can this be guaranteed, especially tailroom. Some cases also use
1068 * LL_MAX_HEADER instead to allocate the skb.
1070 unsigned short needed_headroom
;
1071 unsigned short needed_tailroom
;
1073 /* Interface address info. */
1074 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1075 unsigned char addr_assign_type
; /* hw address assignment type */
1076 unsigned char addr_len
; /* hardware address length */
1077 unsigned short dev_id
; /* for shared network cards */
1079 spinlock_t addr_list_lock
;
1080 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1081 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1083 unsigned int promiscuity
;
1084 unsigned int allmulti
;
1087 /* Protocol specific pointers */
1089 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1090 struct vlan_group __rcu
*vlgrp
; /* VLAN group */
1092 #if IS_ENABLED(CONFIG_NET_DSA)
1093 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1095 void *atalk_ptr
; /* AppleTalk link */
1096 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1097 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1098 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1099 void *ec_ptr
; /* Econet specific data */
1100 void *ax25_ptr
; /* AX.25 specific data */
1101 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1102 assign before registering */
1105 * Cache lines mostly used on receive path (including eth_type_trans())
1107 unsigned long last_rx
; /* Time of last Rx
1108 * This should not be set in
1109 * drivers, unless really needed,
1110 * because network stack (bonding)
1111 * use it if/when necessary, to
1112 * avoid dirtying this cache line.
1115 struct net_device
*master
; /* Pointer to master device of a group,
1116 * which this device is member of.
1119 /* Interface address info used in eth_type_trans() */
1120 unsigned char *dev_addr
; /* hw address, (before bcast
1121 because most packets are
1124 struct netdev_hw_addr_list dev_addrs
; /* list of device
1127 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1130 struct kset
*queues_kset
;
1134 struct netdev_rx_queue
*_rx
;
1136 /* Number of RX queues allocated at register_netdev() time */
1137 unsigned int num_rx_queues
;
1139 /* Number of RX queues currently active in device */
1140 unsigned int real_num_rx_queues
;
1142 #ifdef CONFIG_RFS_ACCEL
1143 /* CPU reverse-mapping for RX completion interrupts, indexed
1144 * by RX queue number. Assigned by driver. This must only be
1145 * set if the ndo_rx_flow_steer operation is defined. */
1146 struct cpu_rmap
*rx_cpu_rmap
;
1150 rx_handler_func_t __rcu
*rx_handler
;
1151 void __rcu
*rx_handler_data
;
1153 struct netdev_queue __rcu
*ingress_queue
;
1156 * Cache lines mostly used on transmit path
1158 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1160 /* Number of TX queues allocated at alloc_netdev_mq() time */
1161 unsigned int num_tx_queues
;
1163 /* Number of TX queues currently active in device */
1164 unsigned int real_num_tx_queues
;
1166 /* root qdisc from userspace point of view */
1167 struct Qdisc
*qdisc
;
1169 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1170 spinlock_t tx_global_lock
;
1173 struct xps_dev_maps __rcu
*xps_maps
;
1176 /* These may be needed for future network-power-down code. */
1179 * trans_start here is expensive for high speed devices on SMP,
1180 * please use netdev_queue->trans_start instead.
1182 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1184 int watchdog_timeo
; /* used by dev_watchdog() */
1185 struct timer_list watchdog_timer
;
1187 /* Number of references to this device */
1188 int __percpu
*pcpu_refcnt
;
1190 /* delayed register/unregister */
1191 struct list_head todo_list
;
1192 /* device index hash chain */
1193 struct hlist_node index_hlist
;
1195 struct list_head link_watch_list
;
1197 /* register/unregister state machine */
1198 enum { NETREG_UNINITIALIZED
=0,
1199 NETREG_REGISTERED
, /* completed register_netdevice */
1200 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1201 NETREG_UNREGISTERED
, /* completed unregister todo */
1202 NETREG_RELEASED
, /* called free_netdev */
1203 NETREG_DUMMY
, /* dummy device for NAPI poll */
1206 bool dismantle
; /* device is going do be freed */
1209 RTNL_LINK_INITIALIZED
,
1210 RTNL_LINK_INITIALIZING
,
1211 } rtnl_link_state
:16;
1213 /* Called from unregister, can be used to call free_netdev */
1214 void (*destructor
)(struct net_device
*dev
);
1216 #ifdef CONFIG_NETPOLL
1217 struct netpoll_info
*npinfo
;
1220 #ifdef CONFIG_NET_NS
1221 /* Network namespace this network device is inside */
1225 /* mid-layer private */
1228 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1229 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1230 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1233 struct garp_port __rcu
*garp_port
;
1235 /* class/net/name entry */
1237 /* space for optional device, statistics, and wireless sysfs groups */
1238 const struct attribute_group
*sysfs_groups
[4];
1240 /* rtnetlink link ops */
1241 const struct rtnl_link_ops
*rtnl_link_ops
;
1243 /* for setting kernel sock attribute on TCP connection setup */
1244 #define GSO_MAX_SIZE 65536
1245 unsigned int gso_max_size
;
1248 /* Data Center Bridging netlink ops */
1249 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1252 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1253 u8 prio_tc_map
[TC_BITMASK
+ 1];
1255 #if IS_ENABLED(CONFIG_FCOE)
1256 /* max exchange id for FCoE LRO by ddp */
1257 unsigned int fcoe_ddp_xid
;
1259 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1260 struct netprio_map __rcu
*priomap
;
1262 /* phy device may attach itself for hardware timestamping */
1263 struct phy_device
*phydev
;
1265 /* group the device belongs to */
1268 #define to_net_dev(d) container_of(d, struct net_device, dev)
1270 #define NETDEV_ALIGN 32
1273 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1275 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1279 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1281 if (tc
>= dev
->num_tc
)
1284 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1289 void netdev_reset_tc(struct net_device
*dev
)
1292 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1293 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1297 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1299 if (tc
>= dev
->num_tc
)
1302 dev
->tc_to_txq
[tc
].count
= count
;
1303 dev
->tc_to_txq
[tc
].offset
= offset
;
1308 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1310 if (num_tc
> TC_MAX_QUEUE
)
1313 dev
->num_tc
= num_tc
;
1318 int netdev_get_num_tc(struct net_device
*dev
)
1324 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1327 return &dev
->_tx
[index
];
1330 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1331 void (*f
)(struct net_device
*,
1332 struct netdev_queue
*,
1338 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1339 f(dev
, &dev
->_tx
[i
], arg
);
1343 * Net namespace inlines
1346 struct net
*dev_net(const struct net_device
*dev
)
1348 return read_pnet(&dev
->nd_net
);
1352 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1354 #ifdef CONFIG_NET_NS
1355 release_net(dev
->nd_net
);
1356 dev
->nd_net
= hold_net(net
);
1360 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1362 #ifdef CONFIG_NET_DSA_TAG_DSA
1363 if (dev
->dsa_ptr
!= NULL
)
1364 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1370 #ifndef CONFIG_NET_NS
1371 static inline void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
)
1375 #else /* CONFIG_NET_NS */
1376 void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
);
1379 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1381 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1382 if (dev
->dsa_ptr
!= NULL
)
1383 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1390 * netdev_priv - access network device private data
1391 * @dev: network device
1393 * Get network device private data
1395 static inline void *netdev_priv(const struct net_device
*dev
)
1397 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1400 /* Set the sysfs physical device reference for the network logical device
1401 * if set prior to registration will cause a symlink during initialization.
1403 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1405 /* Set the sysfs device type for the network logical device to allow
1406 * fin grained indentification of different network device types. For
1407 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1409 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1412 * netif_napi_add - initialize a napi context
1413 * @dev: network device
1414 * @napi: napi context
1415 * @poll: polling function
1416 * @weight: default weight
1418 * netif_napi_add() must be used to initialize a napi context prior to calling
1419 * *any* of the other napi related functions.
1421 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1422 int (*poll
)(struct napi_struct
*, int), int weight
);
1425 * netif_napi_del - remove a napi context
1426 * @napi: napi context
1428 * netif_napi_del() removes a napi context from the network device napi list
1430 void netif_napi_del(struct napi_struct
*napi
);
1432 struct napi_gro_cb
{
1433 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1436 /* Length of frag0. */
1437 unsigned int frag0_len
;
1439 /* This indicates where we are processing relative to skb->data. */
1442 /* This is non-zero if the packet may be of the same flow. */
1445 /* This is non-zero if the packet cannot be merged with the new skb. */
1448 /* Number of segments aggregated. */
1455 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1457 struct packet_type
{
1458 __be16 type
; /* This is really htons(ether_type). */
1459 struct net_device
*dev
; /* NULL is wildcarded here */
1460 int (*func
) (struct sk_buff
*,
1461 struct net_device
*,
1462 struct packet_type
*,
1463 struct net_device
*);
1464 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1465 netdev_features_t features
);
1466 int (*gso_send_check
)(struct sk_buff
*skb
);
1467 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1468 struct sk_buff
*skb
);
1469 int (*gro_complete
)(struct sk_buff
*skb
);
1470 void *af_packet_priv
;
1471 struct list_head list
;
1474 #include <linux/notifier.h>
1476 /* netdevice notifier chain. Please remember to update the rtnetlink
1477 * notification exclusion list in rtnetlink_event() when adding new
1480 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1481 #define NETDEV_DOWN 0x0002
1482 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1483 detected a hardware crash and restarted
1484 - we can use this eg to kick tcp sessions
1486 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1487 #define NETDEV_REGISTER 0x0005
1488 #define NETDEV_UNREGISTER 0x0006
1489 #define NETDEV_CHANGEMTU 0x0007
1490 #define NETDEV_CHANGEADDR 0x0008
1491 #define NETDEV_GOING_DOWN 0x0009
1492 #define NETDEV_CHANGENAME 0x000A
1493 #define NETDEV_FEAT_CHANGE 0x000B
1494 #define NETDEV_BONDING_FAILOVER 0x000C
1495 #define NETDEV_PRE_UP 0x000D
1496 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1497 #define NETDEV_POST_TYPE_CHANGE 0x000F
1498 #define NETDEV_POST_INIT 0x0010
1499 #define NETDEV_UNREGISTER_BATCH 0x0011
1500 #define NETDEV_RELEASE 0x0012
1501 #define NETDEV_NOTIFY_PEERS 0x0013
1502 #define NETDEV_JOIN 0x0014
1504 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1505 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1506 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1509 extern rwlock_t dev_base_lock
; /* Device list lock */
1512 #define for_each_netdev(net, d) \
1513 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1514 #define for_each_netdev_reverse(net, d) \
1515 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1516 #define for_each_netdev_rcu(net, d) \
1517 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1518 #define for_each_netdev_safe(net, d, n) \
1519 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1520 #define for_each_netdev_continue(net, d) \
1521 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1522 #define for_each_netdev_continue_rcu(net, d) \
1523 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1524 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1526 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1528 struct list_head
*lh
;
1532 lh
= dev
->dev_list
.next
;
1533 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1536 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1538 struct list_head
*lh
;
1542 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1543 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1546 static inline struct net_device
*first_net_device(struct net
*net
)
1548 return list_empty(&net
->dev_base_head
) ? NULL
:
1549 net_device_entry(net
->dev_base_head
.next
);
1552 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1554 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1556 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1559 extern int netdev_boot_setup_check(struct net_device
*dev
);
1560 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1561 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1562 const char *hwaddr
);
1563 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1564 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1565 extern void dev_add_pack(struct packet_type
*pt
);
1566 extern void dev_remove_pack(struct packet_type
*pt
);
1567 extern void __dev_remove_pack(struct packet_type
*pt
);
1569 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1570 unsigned short mask
);
1571 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1572 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1573 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1574 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1575 extern int dev_open(struct net_device
*dev
);
1576 extern int dev_close(struct net_device
*dev
);
1577 extern void dev_disable_lro(struct net_device
*dev
);
1578 extern int dev_queue_xmit(struct sk_buff
*skb
);
1579 extern int register_netdevice(struct net_device
*dev
);
1580 extern void unregister_netdevice_queue(struct net_device
*dev
,
1581 struct list_head
*head
);
1582 extern void unregister_netdevice_many(struct list_head
*head
);
1583 static inline void unregister_netdevice(struct net_device
*dev
)
1585 unregister_netdevice_queue(dev
, NULL
);
1588 extern int netdev_refcnt_read(const struct net_device
*dev
);
1589 extern void free_netdev(struct net_device
*dev
);
1590 extern void synchronize_net(void);
1591 extern int init_dummy_netdev(struct net_device
*dev
);
1592 extern void netdev_resync_ops(struct net_device
*dev
);
1594 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1595 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1596 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1597 extern int dev_restart(struct net_device
*dev
);
1598 #ifdef CONFIG_NETPOLL_TRAP
1599 extern int netpoll_trap(void);
1601 extern int skb_gro_receive(struct sk_buff
**head
,
1602 struct sk_buff
*skb
);
1603 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1605 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1607 return NAPI_GRO_CB(skb
)->data_offset
;
1610 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1612 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1615 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1617 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1620 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1621 unsigned int offset
)
1623 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1626 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1628 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1631 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1632 unsigned int offset
)
1634 if (!pskb_may_pull(skb
, hlen
))
1637 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1638 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1639 return skb
->data
+ offset
;
1642 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1644 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1647 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1649 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1650 skb_network_offset(skb
);
1653 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1654 unsigned short type
,
1655 const void *daddr
, const void *saddr
,
1658 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1661 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1664 static inline int dev_parse_header(const struct sk_buff
*skb
,
1665 unsigned char *haddr
)
1667 const struct net_device
*dev
= skb
->dev
;
1669 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1671 return dev
->header_ops
->parse(skb
, haddr
);
1674 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1675 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1676 static inline int unregister_gifconf(unsigned int family
)
1678 return register_gifconf(family
, NULL
);
1682 * Incoming packets are placed on per-cpu queues
1684 struct softnet_data
{
1685 struct Qdisc
*output_queue
;
1686 struct Qdisc
**output_queue_tailp
;
1687 struct list_head poll_list
;
1688 struct sk_buff
*completion_queue
;
1689 struct sk_buff_head process_queue
;
1692 unsigned int processed
;
1693 unsigned int time_squeeze
;
1694 unsigned int cpu_collision
;
1695 unsigned int received_rps
;
1698 struct softnet_data
*rps_ipi_list
;
1700 /* Elements below can be accessed between CPUs for RPS */
1701 struct call_single_data csd ____cacheline_aligned_in_smp
;
1702 struct softnet_data
*rps_ipi_next
;
1704 unsigned int input_queue_head
;
1705 unsigned int input_queue_tail
;
1708 struct sk_buff_head input_pkt_queue
;
1709 struct napi_struct backlog
;
1712 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1715 sd
->input_queue_head
++;
1719 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1720 unsigned int *qtail
)
1723 *qtail
= ++sd
->input_queue_tail
;
1727 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1729 extern void __netif_schedule(struct Qdisc
*q
);
1731 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1733 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1734 __netif_schedule(txq
->qdisc
);
1737 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1741 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1742 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1745 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1747 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1751 * netif_start_queue - allow transmit
1752 * @dev: network device
1754 * Allow upper layers to call the device hard_start_xmit routine.
1756 static inline void netif_start_queue(struct net_device
*dev
)
1758 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1761 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1765 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1766 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1767 netif_tx_start_queue(txq
);
1771 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1773 #ifdef CONFIG_NETPOLL_TRAP
1774 if (netpoll_trap()) {
1775 netif_tx_start_queue(dev_queue
);
1779 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1780 __netif_schedule(dev_queue
->qdisc
);
1784 * netif_wake_queue - restart transmit
1785 * @dev: network device
1787 * Allow upper layers to call the device hard_start_xmit routine.
1788 * Used for flow control when transmit resources are available.
1790 static inline void netif_wake_queue(struct net_device
*dev
)
1792 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1795 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1799 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1800 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1801 netif_tx_wake_queue(txq
);
1805 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1807 if (WARN_ON(!dev_queue
)) {
1808 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1811 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1815 * netif_stop_queue - stop transmitted packets
1816 * @dev: network device
1818 * Stop upper layers calling the device hard_start_xmit routine.
1819 * Used for flow control when transmit resources are unavailable.
1821 static inline void netif_stop_queue(struct net_device
*dev
)
1823 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1826 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1830 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1831 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1832 netif_tx_stop_queue(txq
);
1836 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1838 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1842 * netif_queue_stopped - test if transmit queue is flowblocked
1843 * @dev: network device
1845 * Test if transmit queue on device is currently unable to send.
1847 static inline int netif_queue_stopped(const struct net_device
*dev
)
1849 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1852 static inline int netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
1854 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
1857 static inline int netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
1859 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
1865 * netif_running - test if up
1866 * @dev: network device
1868 * Test if the device has been brought up.
1870 static inline int netif_running(const struct net_device
*dev
)
1872 return test_bit(__LINK_STATE_START
, &dev
->state
);
1876 * Routines to manage the subqueues on a device. We only need start
1877 * stop, and a check if it's stopped. All other device management is
1878 * done at the overall netdevice level.
1879 * Also test the device if we're multiqueue.
1883 * netif_start_subqueue - allow sending packets on subqueue
1884 * @dev: network device
1885 * @queue_index: sub queue index
1887 * Start individual transmit queue of a device with multiple transmit queues.
1889 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1891 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1893 netif_tx_start_queue(txq
);
1897 * netif_stop_subqueue - stop sending packets on subqueue
1898 * @dev: network device
1899 * @queue_index: sub queue index
1901 * Stop individual transmit queue of a device with multiple transmit queues.
1903 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1905 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1906 #ifdef CONFIG_NETPOLL_TRAP
1910 netif_tx_stop_queue(txq
);
1914 * netif_subqueue_stopped - test status of subqueue
1915 * @dev: network device
1916 * @queue_index: sub queue index
1918 * Check individual transmit queue of a device with multiple transmit queues.
1920 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1923 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1925 return netif_tx_queue_stopped(txq
);
1928 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1929 struct sk_buff
*skb
)
1931 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1935 * netif_wake_subqueue - allow sending packets on subqueue
1936 * @dev: network device
1937 * @queue_index: sub queue index
1939 * Resume individual transmit queue of a device with multiple transmit queues.
1941 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1943 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1944 #ifdef CONFIG_NETPOLL_TRAP
1948 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
1949 __netif_schedule(txq
->qdisc
);
1953 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
1954 * as a distribution range limit for the returned value.
1956 static inline u16
skb_tx_hash(const struct net_device
*dev
,
1957 const struct sk_buff
*skb
)
1959 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
1963 * netif_is_multiqueue - test if device has multiple transmit queues
1964 * @dev: network device
1966 * Check if device has multiple transmit queues
1968 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1970 return dev
->num_tx_queues
> 1;
1973 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
1977 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
1980 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
1987 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
1988 const struct net_device
*from_dev
)
1990 netif_set_real_num_tx_queues(to_dev
, from_dev
->real_num_tx_queues
);
1992 return netif_set_real_num_rx_queues(to_dev
,
1993 from_dev
->real_num_rx_queues
);
1999 /* Use this variant when it is known for sure that it
2000 * is executing from hardware interrupt context or with hardware interrupts
2003 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2005 /* Use this variant in places where it could be invoked
2006 * from either hardware interrupt or other context, with hardware interrupts
2007 * either disabled or enabled.
2009 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2011 extern int netif_rx(struct sk_buff
*skb
);
2012 extern int netif_rx_ni(struct sk_buff
*skb
);
2013 extern int netif_receive_skb(struct sk_buff
*skb
);
2014 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
2015 struct sk_buff
*skb
);
2016 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
2017 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2018 struct sk_buff
*skb
);
2019 extern void napi_gro_flush(struct napi_struct
*napi
);
2020 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2021 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
2022 struct sk_buff
*skb
,
2024 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
2025 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2027 static inline void napi_free_frags(struct napi_struct
*napi
)
2029 kfree_skb(napi
->skb
);
2033 extern int netdev_rx_handler_register(struct net_device
*dev
,
2034 rx_handler_func_t
*rx_handler
,
2035 void *rx_handler_data
);
2036 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2038 extern int dev_valid_name(const char *name
);
2039 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2040 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2041 extern unsigned dev_get_flags(const struct net_device
*);
2042 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2043 extern int dev_change_flags(struct net_device
*, unsigned);
2044 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2045 extern int dev_change_name(struct net_device
*, const char *);
2046 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2047 extern int dev_change_net_namespace(struct net_device
*,
2048 struct net
*, const char *);
2049 extern int dev_set_mtu(struct net_device
*, int);
2050 extern void dev_set_group(struct net_device
*, int);
2051 extern int dev_set_mac_address(struct net_device
*,
2053 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2054 struct net_device
*dev
,
2055 struct netdev_queue
*txq
);
2056 extern int dev_forward_skb(struct net_device
*dev
,
2057 struct sk_buff
*skb
);
2059 extern int netdev_budget
;
2061 /* Called by rtnetlink.c:rtnl_unlock() */
2062 extern void netdev_run_todo(void);
2065 * dev_put - release reference to device
2066 * @dev: network device
2068 * Release reference to device to allow it to be freed.
2070 static inline void dev_put(struct net_device
*dev
)
2072 irqsafe_cpu_dec(*dev
->pcpu_refcnt
);
2076 * dev_hold - get reference to device
2077 * @dev: network device
2079 * Hold reference to device to keep it from being freed.
2081 static inline void dev_hold(struct net_device
*dev
)
2083 irqsafe_cpu_inc(*dev
->pcpu_refcnt
);
2086 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2087 * and _off may be called from IRQ context, but it is caller
2088 * who is responsible for serialization of these calls.
2090 * The name carrier is inappropriate, these functions should really be
2091 * called netif_lowerlayer_*() because they represent the state of any
2092 * kind of lower layer not just hardware media.
2095 extern void linkwatch_fire_event(struct net_device
*dev
);
2096 extern void linkwatch_forget_dev(struct net_device
*dev
);
2099 * netif_carrier_ok - test if carrier present
2100 * @dev: network device
2102 * Check if carrier is present on device
2104 static inline int netif_carrier_ok(const struct net_device
*dev
)
2106 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2109 extern unsigned long dev_trans_start(struct net_device
*dev
);
2111 extern void __netdev_watchdog_up(struct net_device
*dev
);
2113 extern void netif_carrier_on(struct net_device
*dev
);
2115 extern void netif_carrier_off(struct net_device
*dev
);
2117 extern void netif_notify_peers(struct net_device
*dev
);
2120 * netif_dormant_on - mark device as dormant.
2121 * @dev: network device
2123 * Mark device as dormant (as per RFC2863).
2125 * The dormant state indicates that the relevant interface is not
2126 * actually in a condition to pass packets (i.e., it is not 'up') but is
2127 * in a "pending" state, waiting for some external event. For "on-
2128 * demand" interfaces, this new state identifies the situation where the
2129 * interface is waiting for events to place it in the up state.
2132 static inline void netif_dormant_on(struct net_device
*dev
)
2134 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2135 linkwatch_fire_event(dev
);
2139 * netif_dormant_off - set device as not dormant.
2140 * @dev: network device
2142 * Device is not in dormant state.
2144 static inline void netif_dormant_off(struct net_device
*dev
)
2146 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2147 linkwatch_fire_event(dev
);
2151 * netif_dormant - test if carrier present
2152 * @dev: network device
2154 * Check if carrier is present on device
2156 static inline int netif_dormant(const struct net_device
*dev
)
2158 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2163 * netif_oper_up - test if device is operational
2164 * @dev: network device
2166 * Check if carrier is operational
2168 static inline int netif_oper_up(const struct net_device
*dev
)
2170 return (dev
->operstate
== IF_OPER_UP
||
2171 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2175 * netif_device_present - is device available or removed
2176 * @dev: network device
2178 * Check if device has not been removed from system.
2180 static inline int netif_device_present(struct net_device
*dev
)
2182 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2185 extern void netif_device_detach(struct net_device
*dev
);
2187 extern void netif_device_attach(struct net_device
*dev
);
2190 * Network interface message level settings
2194 NETIF_MSG_DRV
= 0x0001,
2195 NETIF_MSG_PROBE
= 0x0002,
2196 NETIF_MSG_LINK
= 0x0004,
2197 NETIF_MSG_TIMER
= 0x0008,
2198 NETIF_MSG_IFDOWN
= 0x0010,
2199 NETIF_MSG_IFUP
= 0x0020,
2200 NETIF_MSG_RX_ERR
= 0x0040,
2201 NETIF_MSG_TX_ERR
= 0x0080,
2202 NETIF_MSG_TX_QUEUED
= 0x0100,
2203 NETIF_MSG_INTR
= 0x0200,
2204 NETIF_MSG_TX_DONE
= 0x0400,
2205 NETIF_MSG_RX_STATUS
= 0x0800,
2206 NETIF_MSG_PKTDATA
= 0x1000,
2207 NETIF_MSG_HW
= 0x2000,
2208 NETIF_MSG_WOL
= 0x4000,
2211 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2212 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2213 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2214 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2215 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2216 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2217 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2218 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2219 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2220 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2221 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2222 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2223 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2224 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2225 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2227 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2230 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2231 return default_msg_enable_bits
;
2232 if (debug_value
== 0) /* no output */
2234 /* set low N bits */
2235 return (1 << debug_value
) - 1;
2238 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2240 spin_lock(&txq
->_xmit_lock
);
2241 txq
->xmit_lock_owner
= cpu
;
2244 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2246 spin_lock_bh(&txq
->_xmit_lock
);
2247 txq
->xmit_lock_owner
= smp_processor_id();
2250 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
2252 int ok
= spin_trylock(&txq
->_xmit_lock
);
2254 txq
->xmit_lock_owner
= smp_processor_id();
2258 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2260 txq
->xmit_lock_owner
= -1;
2261 spin_unlock(&txq
->_xmit_lock
);
2264 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2266 txq
->xmit_lock_owner
= -1;
2267 spin_unlock_bh(&txq
->_xmit_lock
);
2270 static inline void txq_trans_update(struct netdev_queue
*txq
)
2272 if (txq
->xmit_lock_owner
!= -1)
2273 txq
->trans_start
= jiffies
;
2277 * netif_tx_lock - grab network device transmit lock
2278 * @dev: network device
2280 * Get network device transmit lock
2282 static inline void netif_tx_lock(struct net_device
*dev
)
2287 spin_lock(&dev
->tx_global_lock
);
2288 cpu
= smp_processor_id();
2289 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2290 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2292 /* We are the only thread of execution doing a
2293 * freeze, but we have to grab the _xmit_lock in
2294 * order to synchronize with threads which are in
2295 * the ->hard_start_xmit() handler and already
2296 * checked the frozen bit.
2298 __netif_tx_lock(txq
, cpu
);
2299 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2300 __netif_tx_unlock(txq
);
2304 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2310 static inline void netif_tx_unlock(struct net_device
*dev
)
2314 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2315 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2317 /* No need to grab the _xmit_lock here. If the
2318 * queue is not stopped for another reason, we
2321 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2322 netif_schedule_queue(txq
);
2324 spin_unlock(&dev
->tx_global_lock
);
2327 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2329 netif_tx_unlock(dev
);
2333 #define HARD_TX_LOCK(dev, txq, cpu) { \
2334 if ((dev->features & NETIF_F_LLTX) == 0) { \
2335 __netif_tx_lock(txq, cpu); \
2339 #define HARD_TX_UNLOCK(dev, txq) { \
2340 if ((dev->features & NETIF_F_LLTX) == 0) { \
2341 __netif_tx_unlock(txq); \
2345 static inline void netif_tx_disable(struct net_device
*dev
)
2351 cpu
= smp_processor_id();
2352 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2353 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2355 __netif_tx_lock(txq
, cpu
);
2356 netif_tx_stop_queue(txq
);
2357 __netif_tx_unlock(txq
);
2362 static inline void netif_addr_lock(struct net_device
*dev
)
2364 spin_lock(&dev
->addr_list_lock
);
2367 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2369 spin_lock_bh(&dev
->addr_list_lock
);
2372 static inline void netif_addr_unlock(struct net_device
*dev
)
2374 spin_unlock(&dev
->addr_list_lock
);
2377 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2379 spin_unlock_bh(&dev
->addr_list_lock
);
2383 * dev_addrs walker. Should be used only for read access. Call with
2384 * rcu_read_lock held.
2386 #define for_each_dev_addr(dev, ha) \
2387 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2389 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2391 extern void ether_setup(struct net_device
*dev
);
2393 /* Support for loadable net-drivers */
2394 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2395 void (*setup
)(struct net_device
*),
2396 unsigned int txqs
, unsigned int rxqs
);
2397 #define alloc_netdev(sizeof_priv, name, setup) \
2398 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2400 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2401 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2403 extern int register_netdev(struct net_device
*dev
);
2404 extern void unregister_netdev(struct net_device
*dev
);
2406 /* General hardware address lists handling functions */
2407 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2408 struct netdev_hw_addr_list
*from_list
,
2409 int addr_len
, unsigned char addr_type
);
2410 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2411 struct netdev_hw_addr_list
*from_list
,
2412 int addr_len
, unsigned char addr_type
);
2413 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2414 struct netdev_hw_addr_list
*from_list
,
2416 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2417 struct netdev_hw_addr_list
*from_list
,
2419 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2420 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2422 /* Functions used for device addresses handling */
2423 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2424 unsigned char addr_type
);
2425 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2426 unsigned char addr_type
);
2427 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2428 struct net_device
*from_dev
,
2429 unsigned char addr_type
);
2430 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2431 struct net_device
*from_dev
,
2432 unsigned char addr_type
);
2433 extern void dev_addr_flush(struct net_device
*dev
);
2434 extern int dev_addr_init(struct net_device
*dev
);
2436 /* Functions used for unicast addresses handling */
2437 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2438 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2439 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2440 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2441 extern void dev_uc_flush(struct net_device
*dev
);
2442 extern void dev_uc_init(struct net_device
*dev
);
2444 /* Functions used for multicast addresses handling */
2445 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2446 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2447 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2448 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2449 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2450 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2451 extern void dev_mc_flush(struct net_device
*dev
);
2452 extern void dev_mc_init(struct net_device
*dev
);
2454 /* Functions used for secondary unicast and multicast support */
2455 extern void dev_set_rx_mode(struct net_device
*dev
);
2456 extern void __dev_set_rx_mode(struct net_device
*dev
);
2457 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2458 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2459 extern void netdev_state_change(struct net_device
*dev
);
2460 extern int netdev_bonding_change(struct net_device
*dev
,
2461 unsigned long event
);
2462 extern void netdev_features_change(struct net_device
*dev
);
2463 /* Load a device via the kmod */
2464 extern void dev_load(struct net
*net
, const char *name
);
2465 extern void dev_mcast_init(void);
2466 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2467 struct rtnl_link_stats64
*storage
);
2469 extern int netdev_max_backlog
;
2470 extern int netdev_tstamp_prequeue
;
2471 extern int weight_p
;
2472 extern int bpf_jit_enable
;
2473 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2474 extern int netdev_set_bond_master(struct net_device
*dev
,
2475 struct net_device
*master
);
2476 extern int skb_checksum_help(struct sk_buff
*skb
);
2477 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
,
2478 netdev_features_t features
);
2480 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2482 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2486 /* rx skb timestamps */
2487 extern void net_enable_timestamp(void);
2488 extern void net_disable_timestamp(void);
2490 #ifdef CONFIG_PROC_FS
2491 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2492 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2493 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2496 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2497 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2499 extern struct kobj_ns_type_operations net_ns_type_operations
;
2501 extern const char *netdev_drivername(const struct net_device
*dev
);
2503 extern void linkwatch_run_queue(void);
2505 static inline netdev_features_t
netdev_get_wanted_features(
2506 struct net_device
*dev
)
2508 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2510 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2511 netdev_features_t one
, netdev_features_t mask
);
2512 int __netdev_update_features(struct net_device
*dev
);
2513 void netdev_update_features(struct net_device
*dev
);
2514 void netdev_change_features(struct net_device
*dev
);
2516 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2517 struct net_device
*dev
);
2519 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2521 static inline int net_gso_ok(netdev_features_t features
, int gso_type
)
2523 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2525 /* check flags correspondence */
2526 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2527 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2528 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2529 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2530 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2531 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2533 return (features
& feature
) == feature
;
2536 static inline int skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2538 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2539 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2542 static inline int netif_needs_gso(struct sk_buff
*skb
,
2543 netdev_features_t features
)
2545 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2546 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
2549 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2552 dev
->gso_max_size
= size
;
2555 static inline int netif_is_bond_slave(struct net_device
*dev
)
2557 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2560 extern struct pernet_operations __net_initdata loopback_net_ops
;
2562 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2564 /* netdev_printk helpers, similar to dev_printk */
2566 static inline const char *netdev_name(const struct net_device
*dev
)
2568 if (dev
->reg_state
!= NETREG_REGISTERED
)
2569 return "(unregistered net_device)";
2573 extern int __netdev_printk(const char *level
, const struct net_device
*dev
,
2574 struct va_format
*vaf
);
2576 extern __printf(3, 4)
2577 int netdev_printk(const char *level
, const struct net_device
*dev
,
2578 const char *format
, ...);
2579 extern __printf(2, 3)
2580 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2581 extern __printf(2, 3)
2582 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2583 extern __printf(2, 3)
2584 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2585 extern __printf(2, 3)
2586 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2587 extern __printf(2, 3)
2588 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2589 extern __printf(2, 3)
2590 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2591 extern __printf(2, 3)
2592 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2594 #define MODULE_ALIAS_NETDEV(device) \
2595 MODULE_ALIAS("netdev-" device)
2598 #define netdev_dbg(__dev, format, args...) \
2599 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2600 #elif defined(CONFIG_DYNAMIC_DEBUG)
2601 #define netdev_dbg(__dev, format, args...) \
2603 dynamic_netdev_dbg(__dev, format, ##args); \
2606 #define netdev_dbg(__dev, format, args...) \
2609 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2614 #if defined(VERBOSE_DEBUG)
2615 #define netdev_vdbg netdev_dbg
2618 #define netdev_vdbg(dev, format, args...) \
2621 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2627 * netdev_WARN() acts like dev_printk(), but with the key difference
2628 * of using a WARN/WARN_ON to get the message out, including the
2629 * file/line information and a backtrace.
2631 #define netdev_WARN(dev, format, args...) \
2632 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2634 /* netif printk helpers, similar to netdev_printk */
2636 #define netif_printk(priv, type, level, dev, fmt, args...) \
2638 if (netif_msg_##type(priv)) \
2639 netdev_printk(level, (dev), fmt, ##args); \
2642 #define netif_level(level, priv, type, dev, fmt, args...) \
2644 if (netif_msg_##type(priv)) \
2645 netdev_##level(dev, fmt, ##args); \
2648 #define netif_emerg(priv, type, dev, fmt, args...) \
2649 netif_level(emerg, priv, type, dev, fmt, ##args)
2650 #define netif_alert(priv, type, dev, fmt, args...) \
2651 netif_level(alert, priv, type, dev, fmt, ##args)
2652 #define netif_crit(priv, type, dev, fmt, args...) \
2653 netif_level(crit, priv, type, dev, fmt, ##args)
2654 #define netif_err(priv, type, dev, fmt, args...) \
2655 netif_level(err, priv, type, dev, fmt, ##args)
2656 #define netif_warn(priv, type, dev, fmt, args...) \
2657 netif_level(warn, priv, type, dev, fmt, ##args)
2658 #define netif_notice(priv, type, dev, fmt, args...) \
2659 netif_level(notice, priv, type, dev, fmt, ##args)
2660 #define netif_info(priv, type, dev, fmt, args...) \
2661 netif_level(info, priv, type, dev, fmt, ##args)
2664 #define netif_dbg(priv, type, dev, format, args...) \
2665 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2666 #elif defined(CONFIG_DYNAMIC_DEBUG)
2667 #define netif_dbg(priv, type, netdev, format, args...) \
2669 if (netif_msg_##type(priv)) \
2670 dynamic_netdev_dbg(netdev, format, ##args); \
2673 #define netif_dbg(priv, type, dev, format, args...) \
2676 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2681 #if defined(VERBOSE_DEBUG)
2682 #define netif_vdbg netif_dbg
2684 #define netif_vdbg(priv, type, dev, format, args...) \
2687 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2692 #endif /* __KERNEL__ */
2694 #endif /* _LINUX_NETDEVICE_H */