2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/pm_qos.h>
29 #include <linux/timer.h>
30 #include <linux/bug.h>
31 #include <linux/delay.h>
32 #include <linux/atomic.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 extern void netdev_set_default_ethtool_ops(struct net_device
*dev
,
64 const struct ethtool_ops
*ops
);
66 /* hardware address assignment types */
67 #define NET_ADDR_PERM 0 /* address is permanent (default) */
68 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
69 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
70 #define NET_ADDR_SET 3 /* address is set using
71 * dev_set_mac_address() */
73 /* Backlog congestion levels */
74 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
75 #define NET_RX_DROP 1 /* packet dropped */
78 * Transmit return codes: transmit return codes originate from three different
81 * - qdisc return codes
82 * - driver transmit return codes
85 * Drivers are allowed to return any one of those in their hard_start_xmit()
86 * function. Real network devices commonly used with qdiscs should only return
87 * the driver transmit return codes though - when qdiscs are used, the actual
88 * transmission happens asynchronously, so the value is not propagated to
89 * higher layers. Virtual network devices transmit synchronously, in this case
90 * the driver transmit return codes are consumed by dev_queue_xmit(), all
91 * others are propagated to higher layers.
94 /* qdisc ->enqueue() return codes. */
95 #define NET_XMIT_SUCCESS 0x00
96 #define NET_XMIT_DROP 0x01 /* skb dropped */
97 #define NET_XMIT_CN 0x02 /* congestion notification */
98 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
99 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
101 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
102 * indicates that the device will soon be dropping packets, or already drops
103 * some packets of the same priority; prompting us to send less aggressively. */
104 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
105 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107 /* Driver transmit return codes */
108 #define NETDEV_TX_MASK 0xf0
111 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
112 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
113 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
114 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
116 typedef enum netdev_tx netdev_tx_t
;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc
)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc
< NET_XMIT_MASK
))
137 * Compute the worst case header length according to the protocols
141 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
148 # define LL_MAX_HEADER 32
151 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
152 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
153 #define MAX_HEADER LL_MAX_HEADER
155 #define MAX_HEADER (LL_MAX_HEADER + 48)
159 * Old network device statistics. Fields are native words
160 * (unsigned long) so they can be read and written atomically.
163 struct net_device_stats
{
164 unsigned long rx_packets
;
165 unsigned long tx_packets
;
166 unsigned long rx_bytes
;
167 unsigned long tx_bytes
;
168 unsigned long rx_errors
;
169 unsigned long tx_errors
;
170 unsigned long rx_dropped
;
171 unsigned long tx_dropped
;
172 unsigned long multicast
;
173 unsigned long collisions
;
174 unsigned long rx_length_errors
;
175 unsigned long rx_over_errors
;
176 unsigned long rx_crc_errors
;
177 unsigned long rx_frame_errors
;
178 unsigned long rx_fifo_errors
;
179 unsigned long rx_missed_errors
;
180 unsigned long tx_aborted_errors
;
181 unsigned long tx_carrier_errors
;
182 unsigned long tx_fifo_errors
;
183 unsigned long tx_heartbeat_errors
;
184 unsigned long tx_window_errors
;
185 unsigned long rx_compressed
;
186 unsigned long tx_compressed
;
190 #include <linux/cache.h>
191 #include <linux/skbuff.h>
194 #include <linux/static_key.h>
195 extern struct static_key rps_needed
;
202 struct netdev_hw_addr
{
203 struct list_head list
;
204 unsigned char addr
[MAX_ADDR_LEN
];
206 #define NETDEV_HW_ADDR_T_LAN 1
207 #define NETDEV_HW_ADDR_T_SAN 2
208 #define NETDEV_HW_ADDR_T_SLAVE 3
209 #define NETDEV_HW_ADDR_T_UNICAST 4
210 #define NETDEV_HW_ADDR_T_MULTICAST 5
215 struct rcu_head rcu_head
;
218 struct netdev_hw_addr_list
{
219 struct list_head list
;
223 #define netdev_hw_addr_list_count(l) ((l)->count)
224 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
225 #define netdev_hw_addr_list_for_each(ha, l) \
226 list_for_each_entry(ha, &(l)->list, list)
228 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
229 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
230 #define netdev_for_each_uc_addr(ha, dev) \
231 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
233 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
234 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
235 #define netdev_for_each_mc_addr(ha, dev) \
236 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 #define LL_RESERVED_SPACE(dev) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
267 unsigned short type
, const void *daddr
,
268 const void *saddr
, unsigned int len
);
269 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
270 int (*rebuild
)(struct sk_buff
*skb
);
271 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
272 void (*cache_update
)(struct hh_cache
*hh
,
273 const struct net_device
*dev
,
274 const unsigned char *haddr
);
277 /* These flag bits are private to the generic network queueing
278 * layer, they may not be explicitly referenced by any other
282 enum netdev_state_t
{
284 __LINK_STATE_PRESENT
,
285 __LINK_STATE_NOCARRIER
,
286 __LINK_STATE_LINKWATCH_PENDING
,
287 __LINK_STATE_DORMANT
,
292 * This structure holds at boot time configured netdevice settings. They
293 * are then used in the device probing.
295 struct netdev_boot_setup
{
299 #define NETDEV_BOOT_SETUP_MAX 8
301 extern int __init
netdev_boot_setup(char *str
);
304 * Structure for NAPI scheduling similar to tasklet but with weighting
307 /* The poll_list must only be managed by the entity which
308 * changes the state of the NAPI_STATE_SCHED bit. This means
309 * whoever atomically sets that bit can add this napi_struct
310 * to the per-cpu poll_list, and whoever clears that bit
311 * can remove from the list right before clearing the bit.
313 struct list_head poll_list
;
317 unsigned int gro_count
;
318 int (*poll
)(struct napi_struct
*, int);
319 #ifdef CONFIG_NETPOLL
320 spinlock_t poll_lock
;
323 struct net_device
*dev
;
324 struct sk_buff
*gro_list
;
326 struct list_head dev_list
;
327 struct hlist_node napi_hash_node
;
328 unsigned int napi_id
;
332 NAPI_STATE_SCHED
, /* Poll is scheduled */
333 NAPI_STATE_DISABLE
, /* Disable pending */
334 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
335 NAPI_STATE_HASHED
, /* In NAPI hash */
345 typedef enum gro_result gro_result_t
;
348 * enum rx_handler_result - Possible return values for rx_handlers.
349 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
351 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
352 * case skb->dev was changed by rx_handler.
353 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
354 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
356 * rx_handlers are functions called from inside __netif_receive_skb(), to do
357 * special processing of the skb, prior to delivery to protocol handlers.
359 * Currently, a net_device can only have a single rx_handler registered. Trying
360 * to register a second rx_handler will return -EBUSY.
362 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
363 * To unregister a rx_handler on a net_device, use
364 * netdev_rx_handler_unregister().
366 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
369 * If the rx_handler consumed to skb in some way, it should return
370 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
371 * the skb to be delivered in some other ways.
373 * If the rx_handler changed skb->dev, to divert the skb to another
374 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
375 * new device will be called if it exists.
377 * If the rx_handler consider the skb should be ignored, it should return
378 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
379 * are registered on exact device (ptype->dev == skb->dev).
381 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
382 * delivered, it should return RX_HANDLER_PASS.
384 * A device without a registered rx_handler will behave as if rx_handler
385 * returned RX_HANDLER_PASS.
388 enum rx_handler_result
{
394 typedef enum rx_handler_result rx_handler_result_t
;
395 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
397 extern void __napi_schedule(struct napi_struct
*n
);
399 static inline bool napi_disable_pending(struct napi_struct
*n
)
401 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
405 * napi_schedule_prep - check if napi can be scheduled
408 * Test if NAPI routine is already running, and if not mark
409 * it as running. This is used as a condition variable
410 * insure only one NAPI poll instance runs. We also make
411 * sure there is no pending NAPI disable.
413 static inline bool napi_schedule_prep(struct napi_struct
*n
)
415 return !napi_disable_pending(n
) &&
416 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
420 * napi_schedule - schedule NAPI poll
423 * Schedule NAPI poll routine to be called if it is not already
426 static inline void napi_schedule(struct napi_struct
*n
)
428 if (napi_schedule_prep(n
))
432 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
433 static inline bool napi_reschedule(struct napi_struct
*napi
)
435 if (napi_schedule_prep(napi
)) {
436 __napi_schedule(napi
);
443 * napi_complete - NAPI processing complete
446 * Mark NAPI processing as complete.
448 extern void __napi_complete(struct napi_struct
*n
);
449 extern void napi_complete(struct napi_struct
*n
);
452 * napi_by_id - lookup a NAPI by napi_id
453 * @napi_id: hashed napi_id
455 * lookup @napi_id in napi_hash table
456 * must be called under rcu_read_lock()
458 extern struct napi_struct
*napi_by_id(unsigned int napi_id
);
461 * napi_hash_add - add a NAPI to global hashtable
462 * @napi: napi context
464 * generate a new napi_id and store a @napi under it in napi_hash
466 extern void napi_hash_add(struct napi_struct
*napi
);
469 * napi_hash_del - remove a NAPI from global table
470 * @napi: napi context
472 * Warning: caller must observe rcu grace period
473 * before freeing memory containing @napi
475 extern void napi_hash_del(struct napi_struct
*napi
);
478 * napi_disable - prevent NAPI from scheduling
481 * Stop NAPI from being scheduled on this context.
482 * Waits till any outstanding processing completes.
484 static inline void napi_disable(struct napi_struct
*n
)
486 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
487 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
489 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
493 * napi_enable - enable NAPI scheduling
496 * Resume NAPI from being scheduled on this context.
497 * Must be paired with napi_disable.
499 static inline void napi_enable(struct napi_struct
*n
)
501 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
502 smp_mb__before_clear_bit();
503 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
508 * napi_synchronize - wait until NAPI is not running
511 * Wait until NAPI is done being scheduled on this context.
512 * Waits till any outstanding processing completes but
513 * does not disable future activations.
515 static inline void napi_synchronize(const struct napi_struct
*n
)
517 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
521 # define napi_synchronize(n) barrier()
524 enum netdev_queue_state_t
{
525 __QUEUE_STATE_DRV_XOFF
,
526 __QUEUE_STATE_STACK_XOFF
,
527 __QUEUE_STATE_FROZEN
,
528 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
529 (1 << __QUEUE_STATE_STACK_XOFF))
530 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
531 (1 << __QUEUE_STATE_FROZEN))
534 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
535 * netif_tx_* functions below are used to manipulate this flag. The
536 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
537 * queue independently. The netif_xmit_*stopped functions below are called
538 * to check if the queue has been stopped by the driver or stack (either
539 * of the XOFF bits are set in the state). Drivers should not need to call
540 * netif_xmit*stopped functions, they should only be using netif_tx_*.
543 struct netdev_queue
{
547 struct net_device
*dev
;
549 struct Qdisc
*qdisc_sleeping
;
553 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
559 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
562 * please use this field instead of dev->trans_start
564 unsigned long trans_start
;
567 * Number of TX timeouts for this queue
568 * (/sys/class/net/DEV/Q/trans_timeout)
570 unsigned long trans_timeout
;
577 } ____cacheline_aligned_in_smp
;
579 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
581 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
588 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
590 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
597 * This structure holds an RPS map which can be of variable length. The
598 * map is an array of CPUs.
605 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
608 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
609 * tail pointer for that CPU's input queue at the time of last enqueue, and
610 * a hardware filter index.
612 struct rps_dev_flow
{
615 unsigned int last_qtail
;
617 #define RPS_NO_FILTER 0xffff
620 * The rps_dev_flow_table structure contains a table of flow mappings.
622 struct rps_dev_flow_table
{
625 struct rps_dev_flow flows
[0];
627 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
628 ((_num) * sizeof(struct rps_dev_flow)))
631 * The rps_sock_flow_table contains mappings of flows to the last CPU
632 * on which they were processed by the application (set in recvmsg).
634 struct rps_sock_flow_table
{
638 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
639 ((_num) * sizeof(u16)))
641 #define RPS_NO_CPU 0xffff
643 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
647 unsigned int cpu
, index
= hash
& table
->mask
;
649 /* We only give a hint, preemption can change cpu under us */
650 cpu
= raw_smp_processor_id();
652 if (table
->ents
[index
] != cpu
)
653 table
->ents
[index
] = cpu
;
657 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
661 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
664 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
666 #ifdef CONFIG_RFS_ACCEL
667 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
668 u32 flow_id
, u16 filter_id
);
671 /* This structure contains an instance of an RX queue. */
672 struct netdev_rx_queue
{
673 struct rps_map __rcu
*rps_map
;
674 struct rps_dev_flow_table __rcu
*rps_flow_table
;
676 struct net_device
*dev
;
677 } ____cacheline_aligned_in_smp
;
678 #endif /* CONFIG_RPS */
682 * This structure holds an XPS map which can be of variable length. The
683 * map is an array of queues.
687 unsigned int alloc_len
;
691 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
692 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
696 * This structure holds all XPS maps for device. Maps are indexed by CPU.
698 struct xps_dev_maps
{
700 struct xps_map __rcu
*cpu_map
[0];
702 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
703 (nr_cpu_ids * sizeof(struct xps_map *)))
704 #endif /* CONFIG_XPS */
706 #define TC_MAX_QUEUE 16
707 #define TC_BITMASK 15
708 /* HW offloaded queuing disciplines txq count and offset maps */
709 struct netdev_tc_txq
{
714 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
716 * This structure is to hold information about the device
717 * configured to run FCoE protocol stack.
719 struct netdev_fcoe_hbainfo
{
720 char manufacturer
[64];
721 char serial_number
[64];
722 char hardware_version
[64];
723 char driver_version
[64];
724 char optionrom_version
[64];
725 char firmware_version
[64];
727 char model_description
[256];
732 * This structure defines the management hooks for network devices.
733 * The following hooks can be defined; unless noted otherwise, they are
734 * optional and can be filled with a null pointer.
736 * int (*ndo_init)(struct net_device *dev);
737 * This function is called once when network device is registered.
738 * The network device can use this to any late stage initializaton
739 * or semantic validattion. It can fail with an error code which will
740 * be propogated back to register_netdev
742 * void (*ndo_uninit)(struct net_device *dev);
743 * This function is called when device is unregistered or when registration
744 * fails. It is not called if init fails.
746 * int (*ndo_open)(struct net_device *dev);
747 * This function is called when network device transistions to the up
750 * int (*ndo_stop)(struct net_device *dev);
751 * This function is called when network device transistions to the down
754 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
755 * struct net_device *dev);
756 * Called when a packet needs to be transmitted.
757 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
758 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
759 * Required can not be NULL.
761 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
762 * Called to decide which queue to when device supports multiple
765 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
766 * This function is called to allow device receiver to make
767 * changes to configuration when multicast or promiscious is enabled.
769 * void (*ndo_set_rx_mode)(struct net_device *dev);
770 * This function is called device changes address list filtering.
771 * If driver handles unicast address filtering, it should set
772 * IFF_UNICAST_FLT to its priv_flags.
774 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
775 * This function is called when the Media Access Control address
776 * needs to be changed. If this interface is not defined, the
777 * mac address can not be changed.
779 * int (*ndo_validate_addr)(struct net_device *dev);
780 * Test if Media Access Control address is valid for the device.
782 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
783 * Called when a user request an ioctl which can't be handled by
784 * the generic interface code. If not defined ioctl's return
785 * not supported error code.
787 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
788 * Used to set network devices bus interface parameters. This interface
789 * is retained for legacy reason, new devices should use the bus
790 * interface (PCI) for low level management.
792 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
793 * Called when a user wants to change the Maximum Transfer Unit
794 * of a device. If not defined, any request to change MTU will
795 * will return an error.
797 * void (*ndo_tx_timeout)(struct net_device *dev);
798 * Callback uses when the transmitter has not made any progress
799 * for dev->watchdog ticks.
801 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
802 * struct rtnl_link_stats64 *storage);
803 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
804 * Called when a user wants to get the network device usage
805 * statistics. Drivers must do one of the following:
806 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
807 * rtnl_link_stats64 structure passed by the caller.
808 * 2. Define @ndo_get_stats to update a net_device_stats structure
809 * (which should normally be dev->stats) and return a pointer to
810 * it. The structure may be changed asynchronously only if each
811 * field is written atomically.
812 * 3. Update dev->stats asynchronously and atomically, and define
815 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
816 * If device support VLAN filtering this function is called when a
817 * VLAN id is registered.
819 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
820 * If device support VLAN filtering this function is called when a
821 * VLAN id is unregistered.
823 * void (*ndo_poll_controller)(struct net_device *dev);
825 * SR-IOV management functions.
826 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
827 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
828 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
829 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
830 * int (*ndo_get_vf_config)(struct net_device *dev,
831 * int vf, struct ifla_vf_info *ivf);
832 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
833 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
834 * struct nlattr *port[]);
835 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
836 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
837 * Called to setup 'tc' number of traffic classes in the net device. This
838 * is always called from the stack with the rtnl lock held and netif tx
839 * queues stopped. This allows the netdevice to perform queue management
842 * Fiber Channel over Ethernet (FCoE) offload functions.
843 * int (*ndo_fcoe_enable)(struct net_device *dev);
844 * Called when the FCoE protocol stack wants to start using LLD for FCoE
845 * so the underlying device can perform whatever needed configuration or
846 * initialization to support acceleration of FCoE traffic.
848 * int (*ndo_fcoe_disable)(struct net_device *dev);
849 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
850 * so the underlying device can perform whatever needed clean-ups to
851 * stop supporting acceleration of FCoE traffic.
853 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
854 * struct scatterlist *sgl, unsigned int sgc);
855 * Called when the FCoE Initiator wants to initialize an I/O that
856 * is a possible candidate for Direct Data Placement (DDP). The LLD can
857 * perform necessary setup and returns 1 to indicate the device is set up
858 * successfully to perform DDP on this I/O, otherwise this returns 0.
860 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
861 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
862 * indicated by the FC exchange id 'xid', so the underlying device can
863 * clean up and reuse resources for later DDP requests.
865 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
866 * struct scatterlist *sgl, unsigned int sgc);
867 * Called when the FCoE Target wants to initialize an I/O that
868 * is a possible candidate for Direct Data Placement (DDP). The LLD can
869 * perform necessary setup and returns 1 to indicate the device is set up
870 * successfully to perform DDP on this I/O, otherwise this returns 0.
872 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
873 * struct netdev_fcoe_hbainfo *hbainfo);
874 * Called when the FCoE Protocol stack wants information on the underlying
875 * device. This information is utilized by the FCoE protocol stack to
876 * register attributes with Fiber Channel management service as per the
877 * FC-GS Fabric Device Management Information(FDMI) specification.
879 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
880 * Called when the underlying device wants to override default World Wide
881 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
882 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
883 * protocol stack to use.
886 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
887 * u16 rxq_index, u32 flow_id);
888 * Set hardware filter for RFS. rxq_index is the target queue index;
889 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
890 * Return the filter ID on success, or a negative error code.
892 * Slave management functions (for bridge, bonding, etc).
893 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
894 * Called to make another netdev an underling.
896 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
897 * Called to release previously enslaved netdev.
899 * Feature/offload setting functions.
900 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
901 * netdev_features_t features);
902 * Adjusts the requested feature flags according to device-specific
903 * constraints, and returns the resulting flags. Must not modify
906 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
907 * Called to update device configuration to new features. Passed
908 * feature set might be less than what was returned by ndo_fix_features()).
909 * Must return >0 or -errno if it changed dev->features itself.
911 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
912 * struct net_device *dev,
913 * const unsigned char *addr, u16 flags)
914 * Adds an FDB entry to dev for addr.
915 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
916 * struct net_device *dev,
917 * const unsigned char *addr)
918 * Deletes the FDB entry from dev coresponding to addr.
919 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
920 * struct net_device *dev, int idx)
921 * Used to add FDB entries to dump requests. Implementers should add
922 * entries to skb and update idx with the number of entries.
924 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
925 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
926 * struct net_device *dev, u32 filter_mask)
928 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
929 * Called to change device carrier. Soft-devices (like dummy, team, etc)
930 * which do not represent real hardware may define this to allow their
931 * userspace components to manage their virtual carrier state. Devices
932 * that determine carrier state from physical hardware properties (eg
933 * network cables) or protocol-dependent mechanisms (eg
934 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
936 struct net_device_ops
{
937 int (*ndo_init
)(struct net_device
*dev
);
938 void (*ndo_uninit
)(struct net_device
*dev
);
939 int (*ndo_open
)(struct net_device
*dev
);
940 int (*ndo_stop
)(struct net_device
*dev
);
941 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
942 struct net_device
*dev
);
943 u16 (*ndo_select_queue
)(struct net_device
*dev
,
944 struct sk_buff
*skb
);
945 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
947 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
948 int (*ndo_set_mac_address
)(struct net_device
*dev
,
950 int (*ndo_validate_addr
)(struct net_device
*dev
);
951 int (*ndo_do_ioctl
)(struct net_device
*dev
,
952 struct ifreq
*ifr
, int cmd
);
953 int (*ndo_set_config
)(struct net_device
*dev
,
955 int (*ndo_change_mtu
)(struct net_device
*dev
,
957 int (*ndo_neigh_setup
)(struct net_device
*dev
,
958 struct neigh_parms
*);
959 void (*ndo_tx_timeout
) (struct net_device
*dev
);
961 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
962 struct rtnl_link_stats64
*storage
);
963 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
965 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
966 __be16 proto
, u16 vid
);
967 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
968 __be16 proto
, u16 vid
);
969 #ifdef CONFIG_NET_POLL_CONTROLLER
970 void (*ndo_poll_controller
)(struct net_device
*dev
);
971 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
972 struct netpoll_info
*info
,
974 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
976 #ifdef CONFIG_NET_LL_RX_POLL
977 int (*ndo_busy_poll
)(struct napi_struct
*dev
);
979 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
981 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
982 int queue
, u16 vlan
, u8 qos
);
983 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
985 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
986 int vf
, bool setting
);
987 int (*ndo_get_vf_config
)(struct net_device
*dev
,
989 struct ifla_vf_info
*ivf
);
990 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
991 int vf
, int link_state
);
992 int (*ndo_set_vf_port
)(struct net_device
*dev
,
994 struct nlattr
*port
[]);
995 int (*ndo_get_vf_port
)(struct net_device
*dev
,
996 int vf
, struct sk_buff
*skb
);
997 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
998 #if IS_ENABLED(CONFIG_FCOE)
999 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1000 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1001 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1003 struct scatterlist
*sgl
,
1005 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1007 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1009 struct scatterlist
*sgl
,
1011 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1012 struct netdev_fcoe_hbainfo
*hbainfo
);
1015 #if IS_ENABLED(CONFIG_LIBFCOE)
1016 #define NETDEV_FCOE_WWNN 0
1017 #define NETDEV_FCOE_WWPN 1
1018 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1019 u64
*wwn
, int type
);
1022 #ifdef CONFIG_RFS_ACCEL
1023 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1024 const struct sk_buff
*skb
,
1028 int (*ndo_add_slave
)(struct net_device
*dev
,
1029 struct net_device
*slave_dev
);
1030 int (*ndo_del_slave
)(struct net_device
*dev
,
1031 struct net_device
*slave_dev
);
1032 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1033 netdev_features_t features
);
1034 int (*ndo_set_features
)(struct net_device
*dev
,
1035 netdev_features_t features
);
1036 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1037 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1039 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1040 struct nlattr
*tb
[],
1041 struct net_device
*dev
,
1042 const unsigned char *addr
,
1044 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1045 struct nlattr
*tb
[],
1046 struct net_device
*dev
,
1047 const unsigned char *addr
);
1048 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1049 struct netlink_callback
*cb
,
1050 struct net_device
*dev
,
1053 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1054 struct nlmsghdr
*nlh
);
1055 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1057 struct net_device
*dev
,
1059 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1060 struct nlmsghdr
*nlh
);
1061 int (*ndo_change_carrier
)(struct net_device
*dev
,
1066 * The DEVICE structure.
1067 * Actually, this whole structure is a big mistake. It mixes I/O
1068 * data with strictly "high-level" data, and it has to know about
1069 * almost every data structure used in the INET module.
1071 * FIXME: cleanup struct net_device such that network protocol info
1078 * This is the first field of the "visible" part of this structure
1079 * (i.e. as seen by users in the "Space.c" file). It is the name
1082 char name
[IFNAMSIZ
];
1084 /* device name hash chain, please keep it close to name[] */
1085 struct hlist_node name_hlist
;
1091 * I/O specific fields
1092 * FIXME: Merge these and struct ifmap into one
1094 unsigned long mem_end
; /* shared mem end */
1095 unsigned long mem_start
; /* shared mem start */
1096 unsigned long base_addr
; /* device I/O address */
1097 unsigned int irq
; /* device IRQ number */
1100 * Some hardware also needs these fields, but they are not
1101 * part of the usual set specified in Space.c.
1104 unsigned long state
;
1106 struct list_head dev_list
;
1107 struct list_head napi_list
;
1108 struct list_head unreg_list
;
1109 struct list_head upper_dev_list
; /* List of upper devices */
1112 /* currently active device features */
1113 netdev_features_t features
;
1114 /* user-changeable features */
1115 netdev_features_t hw_features
;
1116 /* user-requested features */
1117 netdev_features_t wanted_features
;
1118 /* mask of features inheritable by VLAN devices */
1119 netdev_features_t vlan_features
;
1120 /* mask of features inherited by encapsulating devices
1121 * This field indicates what encapsulation offloads
1122 * the hardware is capable of doing, and drivers will
1123 * need to set them appropriately.
1125 netdev_features_t hw_enc_features
;
1126 /* mask of fetures inheritable by MPLS */
1127 netdev_features_t mpls_features
;
1129 /* Interface index. Unique device identifier */
1133 struct net_device_stats stats
;
1134 atomic_long_t rx_dropped
; /* dropped packets by core network
1135 * Do not use this in drivers.
1138 #ifdef CONFIG_WIRELESS_EXT
1139 /* List of functions to handle Wireless Extensions (instead of ioctl).
1140 * See <net/iw_handler.h> for details. Jean II */
1141 const struct iw_handler_def
* wireless_handlers
;
1142 /* Instance data managed by the core of Wireless Extensions. */
1143 struct iw_public_data
* wireless_data
;
1145 /* Management operations */
1146 const struct net_device_ops
*netdev_ops
;
1147 const struct ethtool_ops
*ethtool_ops
;
1149 /* Hardware header description */
1150 const struct header_ops
*header_ops
;
1152 unsigned int flags
; /* interface flags (a la BSD) */
1153 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1154 * See if.h for definitions. */
1155 unsigned short gflags
;
1156 unsigned short padded
; /* How much padding added by alloc_netdev() */
1158 unsigned char operstate
; /* RFC2863 operstate */
1159 unsigned char link_mode
; /* mapping policy to operstate */
1161 unsigned char if_port
; /* Selectable AUI, TP,..*/
1162 unsigned char dma
; /* DMA channel */
1164 unsigned int mtu
; /* interface MTU value */
1165 unsigned short type
; /* interface hardware type */
1166 unsigned short hard_header_len
; /* hardware hdr length */
1168 /* extra head- and tailroom the hardware may need, but not in all cases
1169 * can this be guaranteed, especially tailroom. Some cases also use
1170 * LL_MAX_HEADER instead to allocate the skb.
1172 unsigned short needed_headroom
;
1173 unsigned short needed_tailroom
;
1175 /* Interface address info. */
1176 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1177 unsigned char addr_assign_type
; /* hw address assignment type */
1178 unsigned char addr_len
; /* hardware address length */
1179 unsigned char neigh_priv_len
;
1180 unsigned short dev_id
; /* Used to differentiate devices
1181 * that share the same link
1184 spinlock_t addr_list_lock
;
1185 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1186 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1187 struct netdev_hw_addr_list dev_addrs
; /* list of device
1191 struct kset
*queues_kset
;
1195 unsigned int promiscuity
;
1196 unsigned int allmulti
;
1199 /* Protocol specific pointers */
1201 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1202 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1204 #if IS_ENABLED(CONFIG_NET_DSA)
1205 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1207 void *atalk_ptr
; /* AppleTalk link */
1208 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1209 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1210 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1211 void *ax25_ptr
; /* AX.25 specific data */
1212 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1213 assign before registering */
1216 * Cache lines mostly used on receive path (including eth_type_trans())
1218 unsigned long last_rx
; /* Time of last Rx
1219 * This should not be set in
1220 * drivers, unless really needed,
1221 * because network stack (bonding)
1222 * use it if/when necessary, to
1223 * avoid dirtying this cache line.
1226 /* Interface address info used in eth_type_trans() */
1227 unsigned char *dev_addr
; /* hw address, (before bcast
1228 because most packets are
1233 struct netdev_rx_queue
*_rx
;
1235 /* Number of RX queues allocated at register_netdev() time */
1236 unsigned int num_rx_queues
;
1238 /* Number of RX queues currently active in device */
1239 unsigned int real_num_rx_queues
;
1243 rx_handler_func_t __rcu
*rx_handler
;
1244 void __rcu
*rx_handler_data
;
1246 struct netdev_queue __rcu
*ingress_queue
;
1247 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1251 * Cache lines mostly used on transmit path
1253 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1255 /* Number of TX queues allocated at alloc_netdev_mq() time */
1256 unsigned int num_tx_queues
;
1258 /* Number of TX queues currently active in device */
1259 unsigned int real_num_tx_queues
;
1261 /* root qdisc from userspace point of view */
1262 struct Qdisc
*qdisc
;
1264 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1265 spinlock_t tx_global_lock
;
1268 struct xps_dev_maps __rcu
*xps_maps
;
1270 #ifdef CONFIG_RFS_ACCEL
1271 /* CPU reverse-mapping for RX completion interrupts, indexed
1272 * by RX queue number. Assigned by driver. This must only be
1273 * set if the ndo_rx_flow_steer operation is defined. */
1274 struct cpu_rmap
*rx_cpu_rmap
;
1277 /* These may be needed for future network-power-down code. */
1280 * trans_start here is expensive for high speed devices on SMP,
1281 * please use netdev_queue->trans_start instead.
1283 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1285 int watchdog_timeo
; /* used by dev_watchdog() */
1286 struct timer_list watchdog_timer
;
1288 /* Number of references to this device */
1289 int __percpu
*pcpu_refcnt
;
1291 /* delayed register/unregister */
1292 struct list_head todo_list
;
1293 /* device index hash chain */
1294 struct hlist_node index_hlist
;
1296 struct list_head link_watch_list
;
1298 /* register/unregister state machine */
1299 enum { NETREG_UNINITIALIZED
=0,
1300 NETREG_REGISTERED
, /* completed register_netdevice */
1301 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1302 NETREG_UNREGISTERED
, /* completed unregister todo */
1303 NETREG_RELEASED
, /* called free_netdev */
1304 NETREG_DUMMY
, /* dummy device for NAPI poll */
1307 bool dismantle
; /* device is going do be freed */
1310 RTNL_LINK_INITIALIZED
,
1311 RTNL_LINK_INITIALIZING
,
1312 } rtnl_link_state
:16;
1314 /* Called from unregister, can be used to call free_netdev */
1315 void (*destructor
)(struct net_device
*dev
);
1317 #ifdef CONFIG_NETPOLL
1318 struct netpoll_info __rcu
*npinfo
;
1321 #ifdef CONFIG_NET_NS
1322 /* Network namespace this network device is inside */
1326 /* mid-layer private */
1329 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1330 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1331 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1332 struct pcpu_vstats __percpu
*vstats
; /* veth stats */
1335 struct garp_port __rcu
*garp_port
;
1337 struct mrp_port __rcu
*mrp_port
;
1339 /* class/net/name entry */
1341 /* space for optional device, statistics, and wireless sysfs groups */
1342 const struct attribute_group
*sysfs_groups
[4];
1344 /* rtnetlink link ops */
1345 const struct rtnl_link_ops
*rtnl_link_ops
;
1347 /* for setting kernel sock attribute on TCP connection setup */
1348 #define GSO_MAX_SIZE 65536
1349 unsigned int gso_max_size
;
1350 #define GSO_MAX_SEGS 65535
1354 /* Data Center Bridging netlink ops */
1355 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1358 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1359 u8 prio_tc_map
[TC_BITMASK
+ 1];
1361 #if IS_ENABLED(CONFIG_FCOE)
1362 /* max exchange id for FCoE LRO by ddp */
1363 unsigned int fcoe_ddp_xid
;
1365 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1366 struct netprio_map __rcu
*priomap
;
1368 /* phy device may attach itself for hardware timestamping */
1369 struct phy_device
*phydev
;
1371 struct lock_class_key
*qdisc_tx_busylock
;
1373 /* group the device belongs to */
1376 struct pm_qos_request pm_qos_req
;
1378 #define to_net_dev(d) container_of(d, struct net_device, dev)
1380 #define NETDEV_ALIGN 32
1383 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1385 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1389 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1391 if (tc
>= dev
->num_tc
)
1394 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1399 void netdev_reset_tc(struct net_device
*dev
)
1402 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1403 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1407 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1409 if (tc
>= dev
->num_tc
)
1412 dev
->tc_to_txq
[tc
].count
= count
;
1413 dev
->tc_to_txq
[tc
].offset
= offset
;
1418 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1420 if (num_tc
> TC_MAX_QUEUE
)
1423 dev
->num_tc
= num_tc
;
1428 int netdev_get_num_tc(struct net_device
*dev
)
1434 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1437 return &dev
->_tx
[index
];
1440 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1441 void (*f
)(struct net_device
*,
1442 struct netdev_queue
*,
1448 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1449 f(dev
, &dev
->_tx
[i
], arg
);
1452 extern struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1453 struct sk_buff
*skb
);
1454 extern u16
__netdev_pick_tx(struct net_device
*dev
, struct sk_buff
*skb
);
1457 * Net namespace inlines
1460 struct net
*dev_net(const struct net_device
*dev
)
1462 return read_pnet(&dev
->nd_net
);
1466 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1468 #ifdef CONFIG_NET_NS
1469 release_net(dev
->nd_net
);
1470 dev
->nd_net
= hold_net(net
);
1474 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1476 #ifdef CONFIG_NET_DSA_TAG_DSA
1477 if (dev
->dsa_ptr
!= NULL
)
1478 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1484 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1486 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1487 if (dev
->dsa_ptr
!= NULL
)
1488 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1495 * netdev_priv - access network device private data
1496 * @dev: network device
1498 * Get network device private data
1500 static inline void *netdev_priv(const struct net_device
*dev
)
1502 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1505 /* Set the sysfs physical device reference for the network logical device
1506 * if set prior to registration will cause a symlink during initialization.
1508 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1510 /* Set the sysfs device type for the network logical device to allow
1511 * fin grained indentification of different network device types. For
1512 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1514 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1516 /* Default NAPI poll() weight
1517 * Device drivers are strongly advised to not use bigger value
1519 #define NAPI_POLL_WEIGHT 64
1522 * netif_napi_add - initialize a napi context
1523 * @dev: network device
1524 * @napi: napi context
1525 * @poll: polling function
1526 * @weight: default weight
1528 * netif_napi_add() must be used to initialize a napi context prior to calling
1529 * *any* of the other napi related functions.
1531 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1532 int (*poll
)(struct napi_struct
*, int), int weight
);
1535 * netif_napi_del - remove a napi context
1536 * @napi: napi context
1538 * netif_napi_del() removes a napi context from the network device napi list
1540 void netif_napi_del(struct napi_struct
*napi
);
1542 struct napi_gro_cb
{
1543 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1546 /* Length of frag0. */
1547 unsigned int frag0_len
;
1549 /* This indicates where we are processing relative to skb->data. */
1552 /* This is non-zero if the packet cannot be merged with the new skb. */
1555 /* Number of segments aggregated. */
1558 /* This is non-zero if the packet may be of the same flow. */
1563 #define NAPI_GRO_FREE 1
1564 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1566 /* jiffies when first packet was created/queued */
1569 /* Used in ipv6_gro_receive() */
1572 /* used in skb_gro_receive() slow path */
1573 struct sk_buff
*last
;
1576 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1578 struct packet_type
{
1579 __be16 type
; /* This is really htons(ether_type). */
1580 struct net_device
*dev
; /* NULL is wildcarded here */
1581 int (*func
) (struct sk_buff
*,
1582 struct net_device
*,
1583 struct packet_type
*,
1584 struct net_device
*);
1585 bool (*id_match
)(struct packet_type
*ptype
,
1587 void *af_packet_priv
;
1588 struct list_head list
;
1591 struct offload_callbacks
{
1592 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1593 netdev_features_t features
);
1594 int (*gso_send_check
)(struct sk_buff
*skb
);
1595 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1596 struct sk_buff
*skb
);
1597 int (*gro_complete
)(struct sk_buff
*skb
);
1600 struct packet_offload
{
1601 __be16 type
; /* This is really htons(ether_type). */
1602 struct offload_callbacks callbacks
;
1603 struct list_head list
;
1606 #include <linux/notifier.h>
1608 /* netdevice notifier chain. Please remember to update the rtnetlink
1609 * notification exclusion list in rtnetlink_event() when adding new
1612 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1613 #define NETDEV_DOWN 0x0002
1614 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1615 detected a hardware crash and restarted
1616 - we can use this eg to kick tcp sessions
1618 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1619 #define NETDEV_REGISTER 0x0005
1620 #define NETDEV_UNREGISTER 0x0006
1621 #define NETDEV_CHANGEMTU 0x0007
1622 #define NETDEV_CHANGEADDR 0x0008
1623 #define NETDEV_GOING_DOWN 0x0009
1624 #define NETDEV_CHANGENAME 0x000A
1625 #define NETDEV_FEAT_CHANGE 0x000B
1626 #define NETDEV_BONDING_FAILOVER 0x000C
1627 #define NETDEV_PRE_UP 0x000D
1628 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1629 #define NETDEV_POST_TYPE_CHANGE 0x000F
1630 #define NETDEV_POST_INIT 0x0010
1631 #define NETDEV_UNREGISTER_FINAL 0x0011
1632 #define NETDEV_RELEASE 0x0012
1633 #define NETDEV_NOTIFY_PEERS 0x0013
1634 #define NETDEV_JOIN 0x0014
1635 #define NETDEV_CHANGEUPPER 0x0015
1637 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1638 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1640 struct netdev_notifier_info
{
1641 struct net_device
*dev
;
1644 struct netdev_notifier_change_info
{
1645 struct netdev_notifier_info info
; /* must be first */
1646 unsigned int flags_changed
;
1649 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
1650 struct net_device
*dev
)
1655 static inline struct net_device
*
1656 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
1661 extern int call_netdevice_notifiers_info(unsigned long val
, struct net_device
*dev
,
1662 struct netdev_notifier_info
*info
);
1663 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1666 extern rwlock_t dev_base_lock
; /* Device list lock */
1668 extern seqcount_t devnet_rename_seq
; /* Device rename seq */
1671 #define for_each_netdev(net, d) \
1672 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1673 #define for_each_netdev_reverse(net, d) \
1674 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1675 #define for_each_netdev_rcu(net, d) \
1676 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1677 #define for_each_netdev_safe(net, d, n) \
1678 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1679 #define for_each_netdev_continue(net, d) \
1680 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1681 #define for_each_netdev_continue_rcu(net, d) \
1682 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1683 #define for_each_netdev_in_bond_rcu(bond, slave) \
1684 for_each_netdev_rcu(&init_net, slave) \
1685 if (netdev_master_upper_dev_get_rcu(slave) == bond)
1686 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1688 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1690 struct list_head
*lh
;
1694 lh
= dev
->dev_list
.next
;
1695 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1698 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1700 struct list_head
*lh
;
1704 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1705 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1708 static inline struct net_device
*first_net_device(struct net
*net
)
1710 return list_empty(&net
->dev_base_head
) ? NULL
:
1711 net_device_entry(net
->dev_base_head
.next
);
1714 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1716 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1718 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1721 extern int netdev_boot_setup_check(struct net_device
*dev
);
1722 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1723 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1724 const char *hwaddr
);
1725 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1726 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1727 extern void dev_add_pack(struct packet_type
*pt
);
1728 extern void dev_remove_pack(struct packet_type
*pt
);
1729 extern void __dev_remove_pack(struct packet_type
*pt
);
1730 extern void dev_add_offload(struct packet_offload
*po
);
1731 extern void dev_remove_offload(struct packet_offload
*po
);
1732 extern void __dev_remove_offload(struct packet_offload
*po
);
1734 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1735 unsigned short mask
);
1736 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1737 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1738 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1739 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1740 extern int dev_open(struct net_device
*dev
);
1741 extern int dev_close(struct net_device
*dev
);
1742 extern void dev_disable_lro(struct net_device
*dev
);
1743 extern int dev_loopback_xmit(struct sk_buff
*newskb
);
1744 extern int dev_queue_xmit(struct sk_buff
*skb
);
1745 extern int register_netdevice(struct net_device
*dev
);
1746 extern void unregister_netdevice_queue(struct net_device
*dev
,
1747 struct list_head
*head
);
1748 extern void unregister_netdevice_many(struct list_head
*head
);
1749 static inline void unregister_netdevice(struct net_device
*dev
)
1751 unregister_netdevice_queue(dev
, NULL
);
1754 extern int netdev_refcnt_read(const struct net_device
*dev
);
1755 extern void free_netdev(struct net_device
*dev
);
1756 extern void synchronize_net(void);
1757 extern int init_dummy_netdev(struct net_device
*dev
);
1759 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1760 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1761 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1762 extern int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
1763 extern int dev_restart(struct net_device
*dev
);
1764 #ifdef CONFIG_NETPOLL_TRAP
1765 extern int netpoll_trap(void);
1767 extern int skb_gro_receive(struct sk_buff
**head
,
1768 struct sk_buff
*skb
);
1770 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1772 return NAPI_GRO_CB(skb
)->data_offset
;
1775 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1777 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1780 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1782 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1785 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1786 unsigned int offset
)
1788 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1791 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1793 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1796 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1797 unsigned int offset
)
1799 if (!pskb_may_pull(skb
, hlen
))
1802 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1803 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1804 return skb
->data
+ offset
;
1807 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1809 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1812 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1814 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1815 skb_network_offset(skb
);
1818 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1819 unsigned short type
,
1820 const void *daddr
, const void *saddr
,
1823 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1826 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1829 static inline int dev_parse_header(const struct sk_buff
*skb
,
1830 unsigned char *haddr
)
1832 const struct net_device
*dev
= skb
->dev
;
1834 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1836 return dev
->header_ops
->parse(skb
, haddr
);
1839 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1840 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1841 static inline int unregister_gifconf(unsigned int family
)
1843 return register_gifconf(family
, NULL
);
1846 #ifdef CONFIG_NET_FLOW_LIMIT
1847 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
1848 struct sd_flow_limit
{
1850 unsigned int num_buckets
;
1851 unsigned int history_head
;
1852 u16 history
[FLOW_LIMIT_HISTORY
];
1856 extern int netdev_flow_limit_table_len
;
1857 #endif /* CONFIG_NET_FLOW_LIMIT */
1860 * Incoming packets are placed on per-cpu queues
1862 struct softnet_data
{
1863 struct Qdisc
*output_queue
;
1864 struct Qdisc
**output_queue_tailp
;
1865 struct list_head poll_list
;
1866 struct sk_buff
*completion_queue
;
1867 struct sk_buff_head process_queue
;
1870 unsigned int processed
;
1871 unsigned int time_squeeze
;
1872 unsigned int cpu_collision
;
1873 unsigned int received_rps
;
1876 struct softnet_data
*rps_ipi_list
;
1878 /* Elements below can be accessed between CPUs for RPS */
1879 struct call_single_data csd ____cacheline_aligned_in_smp
;
1880 struct softnet_data
*rps_ipi_next
;
1882 unsigned int input_queue_head
;
1883 unsigned int input_queue_tail
;
1885 unsigned int dropped
;
1886 struct sk_buff_head input_pkt_queue
;
1887 struct napi_struct backlog
;
1889 #ifdef CONFIG_NET_FLOW_LIMIT
1890 struct sd_flow_limit __rcu
*flow_limit
;
1894 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1897 sd
->input_queue_head
++;
1901 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1902 unsigned int *qtail
)
1905 *qtail
= ++sd
->input_queue_tail
;
1909 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1911 extern void __netif_schedule(struct Qdisc
*q
);
1913 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1915 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1916 __netif_schedule(txq
->qdisc
);
1919 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1923 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1924 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1927 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1929 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1933 * netif_start_queue - allow transmit
1934 * @dev: network device
1936 * Allow upper layers to call the device hard_start_xmit routine.
1938 static inline void netif_start_queue(struct net_device
*dev
)
1940 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1943 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1947 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1948 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1949 netif_tx_start_queue(txq
);
1953 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1955 #ifdef CONFIG_NETPOLL_TRAP
1956 if (netpoll_trap()) {
1957 netif_tx_start_queue(dev_queue
);
1961 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1962 __netif_schedule(dev_queue
->qdisc
);
1966 * netif_wake_queue - restart transmit
1967 * @dev: network device
1969 * Allow upper layers to call the device hard_start_xmit routine.
1970 * Used for flow control when transmit resources are available.
1972 static inline void netif_wake_queue(struct net_device
*dev
)
1974 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1977 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1981 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1982 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1983 netif_tx_wake_queue(txq
);
1987 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1989 if (WARN_ON(!dev_queue
)) {
1990 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1993 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1997 * netif_stop_queue - stop transmitted packets
1998 * @dev: network device
2000 * Stop upper layers calling the device hard_start_xmit routine.
2001 * Used for flow control when transmit resources are unavailable.
2003 static inline void netif_stop_queue(struct net_device
*dev
)
2005 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2008 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
2012 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2013 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2014 netif_tx_stop_queue(txq
);
2018 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2020 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2024 * netif_queue_stopped - test if transmit queue is flowblocked
2025 * @dev: network device
2027 * Test if transmit queue on device is currently unable to send.
2029 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2031 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2034 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2036 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2039 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2041 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2044 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2048 dql_queued(&dev_queue
->dql
, bytes
);
2050 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2053 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2056 * The XOFF flag must be set before checking the dql_avail below,
2057 * because in netdev_tx_completed_queue we update the dql_completed
2058 * before checking the XOFF flag.
2062 /* check again in case another CPU has just made room avail */
2063 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2064 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2068 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2070 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2073 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2074 unsigned int pkts
, unsigned int bytes
)
2077 if (unlikely(!bytes
))
2080 dql_completed(&dev_queue
->dql
, bytes
);
2083 * Without the memory barrier there is a small possiblity that
2084 * netdev_tx_sent_queue will miss the update and cause the queue to
2085 * be stopped forever
2089 if (dql_avail(&dev_queue
->dql
) < 0)
2092 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2093 netif_schedule_queue(dev_queue
);
2097 static inline void netdev_completed_queue(struct net_device
*dev
,
2098 unsigned int pkts
, unsigned int bytes
)
2100 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2103 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2106 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2111 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2113 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2117 * netif_running - test if up
2118 * @dev: network device
2120 * Test if the device has been brought up.
2122 static inline bool netif_running(const struct net_device
*dev
)
2124 return test_bit(__LINK_STATE_START
, &dev
->state
);
2128 * Routines to manage the subqueues on a device. We only need start
2129 * stop, and a check if it's stopped. All other device management is
2130 * done at the overall netdevice level.
2131 * Also test the device if we're multiqueue.
2135 * netif_start_subqueue - allow sending packets on subqueue
2136 * @dev: network device
2137 * @queue_index: sub queue index
2139 * Start individual transmit queue of a device with multiple transmit queues.
2141 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2143 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2145 netif_tx_start_queue(txq
);
2149 * netif_stop_subqueue - stop sending packets on subqueue
2150 * @dev: network device
2151 * @queue_index: sub queue index
2153 * Stop individual transmit queue of a device with multiple transmit queues.
2155 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2157 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2158 #ifdef CONFIG_NETPOLL_TRAP
2162 netif_tx_stop_queue(txq
);
2166 * netif_subqueue_stopped - test status of subqueue
2167 * @dev: network device
2168 * @queue_index: sub queue index
2170 * Check individual transmit queue of a device with multiple transmit queues.
2172 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2175 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2177 return netif_tx_queue_stopped(txq
);
2180 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2181 struct sk_buff
*skb
)
2183 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2187 * netif_wake_subqueue - allow sending packets on subqueue
2188 * @dev: network device
2189 * @queue_index: sub queue index
2191 * Resume individual transmit queue of a device with multiple transmit queues.
2193 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2195 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2196 #ifdef CONFIG_NETPOLL_TRAP
2200 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2201 __netif_schedule(txq
->qdisc
);
2205 extern int netif_set_xps_queue(struct net_device
*dev
, struct cpumask
*mask
,
2208 static inline int netif_set_xps_queue(struct net_device
*dev
,
2209 struct cpumask
*mask
,
2217 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2218 * as a distribution range limit for the returned value.
2220 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2221 const struct sk_buff
*skb
)
2223 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2227 * netif_is_multiqueue - test if device has multiple transmit queues
2228 * @dev: network device
2230 * Check if device has multiple transmit queues
2232 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2234 return dev
->num_tx_queues
> 1;
2237 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
2241 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
2244 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2251 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2252 const struct net_device
*from_dev
)
2256 err
= netif_set_real_num_tx_queues(to_dev
,
2257 from_dev
->real_num_tx_queues
);
2261 return netif_set_real_num_rx_queues(to_dev
,
2262 from_dev
->real_num_rx_queues
);
2268 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2269 extern int netif_get_num_default_rss_queues(void);
2271 /* Use this variant when it is known for sure that it
2272 * is executing from hardware interrupt context or with hardware interrupts
2275 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2277 /* Use this variant in places where it could be invoked
2278 * from either hardware interrupt or other context, with hardware interrupts
2279 * either disabled or enabled.
2281 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2283 extern int netif_rx(struct sk_buff
*skb
);
2284 extern int netif_rx_ni(struct sk_buff
*skb
);
2285 extern int netif_receive_skb(struct sk_buff
*skb
);
2286 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2287 struct sk_buff
*skb
);
2288 extern void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2289 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2290 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2292 static inline void napi_free_frags(struct napi_struct
*napi
)
2294 kfree_skb(napi
->skb
);
2298 extern int netdev_rx_handler_register(struct net_device
*dev
,
2299 rx_handler_func_t
*rx_handler
,
2300 void *rx_handler_data
);
2301 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2303 extern bool dev_valid_name(const char *name
);
2304 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2305 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2306 extern unsigned int dev_get_flags(const struct net_device
*);
2307 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2308 extern int dev_change_flags(struct net_device
*, unsigned int);
2309 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2310 extern int dev_change_name(struct net_device
*, const char *);
2311 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2312 extern int dev_change_net_namespace(struct net_device
*,
2313 struct net
*, const char *);
2314 extern int dev_set_mtu(struct net_device
*, int);
2315 extern void dev_set_group(struct net_device
*, int);
2316 extern int dev_set_mac_address(struct net_device
*,
2318 extern int dev_change_carrier(struct net_device
*,
2320 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2321 struct net_device
*dev
,
2322 struct netdev_queue
*txq
);
2323 extern int dev_forward_skb(struct net_device
*dev
,
2324 struct sk_buff
*skb
);
2326 extern int netdev_budget
;
2328 /* Called by rtnetlink.c:rtnl_unlock() */
2329 extern void netdev_run_todo(void);
2332 * dev_put - release reference to device
2333 * @dev: network device
2335 * Release reference to device to allow it to be freed.
2337 static inline void dev_put(struct net_device
*dev
)
2339 this_cpu_dec(*dev
->pcpu_refcnt
);
2343 * dev_hold - get reference to device
2344 * @dev: network device
2346 * Hold reference to device to keep it from being freed.
2348 static inline void dev_hold(struct net_device
*dev
)
2350 this_cpu_inc(*dev
->pcpu_refcnt
);
2353 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2354 * and _off may be called from IRQ context, but it is caller
2355 * who is responsible for serialization of these calls.
2357 * The name carrier is inappropriate, these functions should really be
2358 * called netif_lowerlayer_*() because they represent the state of any
2359 * kind of lower layer not just hardware media.
2362 extern void linkwatch_init_dev(struct net_device
*dev
);
2363 extern void linkwatch_fire_event(struct net_device
*dev
);
2364 extern void linkwatch_forget_dev(struct net_device
*dev
);
2367 * netif_carrier_ok - test if carrier present
2368 * @dev: network device
2370 * Check if carrier is present on device
2372 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2374 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2377 extern unsigned long dev_trans_start(struct net_device
*dev
);
2379 extern void __netdev_watchdog_up(struct net_device
*dev
);
2381 extern void netif_carrier_on(struct net_device
*dev
);
2383 extern void netif_carrier_off(struct net_device
*dev
);
2386 * netif_dormant_on - mark device as dormant.
2387 * @dev: network device
2389 * Mark device as dormant (as per RFC2863).
2391 * The dormant state indicates that the relevant interface is not
2392 * actually in a condition to pass packets (i.e., it is not 'up') but is
2393 * in a "pending" state, waiting for some external event. For "on-
2394 * demand" interfaces, this new state identifies the situation where the
2395 * interface is waiting for events to place it in the up state.
2398 static inline void netif_dormant_on(struct net_device
*dev
)
2400 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2401 linkwatch_fire_event(dev
);
2405 * netif_dormant_off - set device as not dormant.
2406 * @dev: network device
2408 * Device is not in dormant state.
2410 static inline void netif_dormant_off(struct net_device
*dev
)
2412 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2413 linkwatch_fire_event(dev
);
2417 * netif_dormant - test if carrier present
2418 * @dev: network device
2420 * Check if carrier is present on device
2422 static inline bool netif_dormant(const struct net_device
*dev
)
2424 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2429 * netif_oper_up - test if device is operational
2430 * @dev: network device
2432 * Check if carrier is operational
2434 static inline bool netif_oper_up(const struct net_device
*dev
)
2436 return (dev
->operstate
== IF_OPER_UP
||
2437 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2441 * netif_device_present - is device available or removed
2442 * @dev: network device
2444 * Check if device has not been removed from system.
2446 static inline bool netif_device_present(struct net_device
*dev
)
2448 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2451 extern void netif_device_detach(struct net_device
*dev
);
2453 extern void netif_device_attach(struct net_device
*dev
);
2456 * Network interface message level settings
2460 NETIF_MSG_DRV
= 0x0001,
2461 NETIF_MSG_PROBE
= 0x0002,
2462 NETIF_MSG_LINK
= 0x0004,
2463 NETIF_MSG_TIMER
= 0x0008,
2464 NETIF_MSG_IFDOWN
= 0x0010,
2465 NETIF_MSG_IFUP
= 0x0020,
2466 NETIF_MSG_RX_ERR
= 0x0040,
2467 NETIF_MSG_TX_ERR
= 0x0080,
2468 NETIF_MSG_TX_QUEUED
= 0x0100,
2469 NETIF_MSG_INTR
= 0x0200,
2470 NETIF_MSG_TX_DONE
= 0x0400,
2471 NETIF_MSG_RX_STATUS
= 0x0800,
2472 NETIF_MSG_PKTDATA
= 0x1000,
2473 NETIF_MSG_HW
= 0x2000,
2474 NETIF_MSG_WOL
= 0x4000,
2477 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2478 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2479 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2480 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2481 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2482 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2483 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2484 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2485 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2486 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2487 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2488 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2489 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2490 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2491 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2493 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2496 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2497 return default_msg_enable_bits
;
2498 if (debug_value
== 0) /* no output */
2500 /* set low N bits */
2501 return (1 << debug_value
) - 1;
2504 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2506 spin_lock(&txq
->_xmit_lock
);
2507 txq
->xmit_lock_owner
= cpu
;
2510 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2512 spin_lock_bh(&txq
->_xmit_lock
);
2513 txq
->xmit_lock_owner
= smp_processor_id();
2516 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2518 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2520 txq
->xmit_lock_owner
= smp_processor_id();
2524 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2526 txq
->xmit_lock_owner
= -1;
2527 spin_unlock(&txq
->_xmit_lock
);
2530 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2532 txq
->xmit_lock_owner
= -1;
2533 spin_unlock_bh(&txq
->_xmit_lock
);
2536 static inline void txq_trans_update(struct netdev_queue
*txq
)
2538 if (txq
->xmit_lock_owner
!= -1)
2539 txq
->trans_start
= jiffies
;
2543 * netif_tx_lock - grab network device transmit lock
2544 * @dev: network device
2546 * Get network device transmit lock
2548 static inline void netif_tx_lock(struct net_device
*dev
)
2553 spin_lock(&dev
->tx_global_lock
);
2554 cpu
= smp_processor_id();
2555 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2556 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2558 /* We are the only thread of execution doing a
2559 * freeze, but we have to grab the _xmit_lock in
2560 * order to synchronize with threads which are in
2561 * the ->hard_start_xmit() handler and already
2562 * checked the frozen bit.
2564 __netif_tx_lock(txq
, cpu
);
2565 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2566 __netif_tx_unlock(txq
);
2570 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2576 static inline void netif_tx_unlock(struct net_device
*dev
)
2580 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2581 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2583 /* No need to grab the _xmit_lock here. If the
2584 * queue is not stopped for another reason, we
2587 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2588 netif_schedule_queue(txq
);
2590 spin_unlock(&dev
->tx_global_lock
);
2593 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2595 netif_tx_unlock(dev
);
2599 #define HARD_TX_LOCK(dev, txq, cpu) { \
2600 if ((dev->features & NETIF_F_LLTX) == 0) { \
2601 __netif_tx_lock(txq, cpu); \
2605 #define HARD_TX_UNLOCK(dev, txq) { \
2606 if ((dev->features & NETIF_F_LLTX) == 0) { \
2607 __netif_tx_unlock(txq); \
2611 static inline void netif_tx_disable(struct net_device
*dev
)
2617 cpu
= smp_processor_id();
2618 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2619 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2621 __netif_tx_lock(txq
, cpu
);
2622 netif_tx_stop_queue(txq
);
2623 __netif_tx_unlock(txq
);
2628 static inline void netif_addr_lock(struct net_device
*dev
)
2630 spin_lock(&dev
->addr_list_lock
);
2633 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2635 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2638 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2640 spin_lock_bh(&dev
->addr_list_lock
);
2643 static inline void netif_addr_unlock(struct net_device
*dev
)
2645 spin_unlock(&dev
->addr_list_lock
);
2648 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2650 spin_unlock_bh(&dev
->addr_list_lock
);
2654 * dev_addrs walker. Should be used only for read access. Call with
2655 * rcu_read_lock held.
2657 #define for_each_dev_addr(dev, ha) \
2658 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2660 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2662 extern void ether_setup(struct net_device
*dev
);
2664 /* Support for loadable net-drivers */
2665 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2666 void (*setup
)(struct net_device
*),
2667 unsigned int txqs
, unsigned int rxqs
);
2668 #define alloc_netdev(sizeof_priv, name, setup) \
2669 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2671 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2672 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2674 extern int register_netdev(struct net_device
*dev
);
2675 extern void unregister_netdev(struct net_device
*dev
);
2677 /* General hardware address lists handling functions */
2678 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2679 struct netdev_hw_addr_list
*from_list
,
2680 int addr_len
, unsigned char addr_type
);
2681 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2682 struct netdev_hw_addr_list
*from_list
,
2683 int addr_len
, unsigned char addr_type
);
2684 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2685 struct netdev_hw_addr_list
*from_list
,
2687 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2688 struct netdev_hw_addr_list
*from_list
,
2690 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2691 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2693 /* Functions used for device addresses handling */
2694 extern int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
2695 unsigned char addr_type
);
2696 extern int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
2697 unsigned char addr_type
);
2698 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2699 struct net_device
*from_dev
,
2700 unsigned char addr_type
);
2701 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2702 struct net_device
*from_dev
,
2703 unsigned char addr_type
);
2704 extern void dev_addr_flush(struct net_device
*dev
);
2705 extern int dev_addr_init(struct net_device
*dev
);
2707 /* Functions used for unicast addresses handling */
2708 extern int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
2709 extern int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2710 extern int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
2711 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2712 extern int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
2713 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2714 extern void dev_uc_flush(struct net_device
*dev
);
2715 extern void dev_uc_init(struct net_device
*dev
);
2717 /* Functions used for multicast addresses handling */
2718 extern int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
2719 extern int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
2720 extern int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2721 extern int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
2722 extern int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
2723 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2724 extern int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
2725 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2726 extern void dev_mc_flush(struct net_device
*dev
);
2727 extern void dev_mc_init(struct net_device
*dev
);
2729 /* Functions used for secondary unicast and multicast support */
2730 extern void dev_set_rx_mode(struct net_device
*dev
);
2731 extern void __dev_set_rx_mode(struct net_device
*dev
);
2732 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2733 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2734 extern void netdev_state_change(struct net_device
*dev
);
2735 extern void netdev_notify_peers(struct net_device
*dev
);
2736 extern void netdev_features_change(struct net_device
*dev
);
2737 /* Load a device via the kmod */
2738 extern void dev_load(struct net
*net
, const char *name
);
2739 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2740 struct rtnl_link_stats64
*storage
);
2741 extern void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
2742 const struct net_device_stats
*netdev_stats
);
2744 extern int netdev_max_backlog
;
2745 extern int netdev_tstamp_prequeue
;
2746 extern int weight_p
;
2747 extern int bpf_jit_enable
;
2749 extern bool netdev_has_upper_dev(struct net_device
*dev
,
2750 struct net_device
*upper_dev
);
2751 extern bool netdev_has_any_upper_dev(struct net_device
*dev
);
2752 extern struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
2753 extern struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
2754 extern int netdev_upper_dev_link(struct net_device
*dev
,
2755 struct net_device
*upper_dev
);
2756 extern int netdev_master_upper_dev_link(struct net_device
*dev
,
2757 struct net_device
*upper_dev
);
2758 extern void netdev_upper_dev_unlink(struct net_device
*dev
,
2759 struct net_device
*upper_dev
);
2760 extern int skb_checksum_help(struct sk_buff
*skb
);
2761 extern struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
2762 netdev_features_t features
, bool tx_path
);
2763 extern struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
2764 netdev_features_t features
);
2767 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
2769 return __skb_gso_segment(skb
, features
, true);
2771 __be16
skb_network_protocol(struct sk_buff
*skb
);
2773 static inline bool can_checksum_protocol(netdev_features_t features
,
2776 return ((features
& NETIF_F_GEN_CSUM
) ||
2777 ((features
& NETIF_F_V4_CSUM
) &&
2778 protocol
== htons(ETH_P_IP
)) ||
2779 ((features
& NETIF_F_V6_CSUM
) &&
2780 protocol
== htons(ETH_P_IPV6
)) ||
2781 ((features
& NETIF_F_FCOE_CRC
) &&
2782 protocol
== htons(ETH_P_FCOE
)));
2786 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2788 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2792 /* rx skb timestamps */
2793 extern void net_enable_timestamp(void);
2794 extern void net_disable_timestamp(void);
2796 #ifdef CONFIG_PROC_FS
2797 extern int __init
dev_proc_init(void);
2799 #define dev_proc_init() 0
2802 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2803 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2805 extern struct kobj_ns_type_operations net_ns_type_operations
;
2807 extern const char *netdev_drivername(const struct net_device
*dev
);
2809 extern void linkwatch_run_queue(void);
2811 static inline netdev_features_t
netdev_get_wanted_features(
2812 struct net_device
*dev
)
2814 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2816 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2817 netdev_features_t one
, netdev_features_t mask
);
2819 /* Allow TSO being used on stacked device :
2820 * Performing the GSO segmentation before last device
2821 * is a performance improvement.
2823 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
2824 netdev_features_t mask
)
2826 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
2829 int __netdev_update_features(struct net_device
*dev
);
2830 void netdev_update_features(struct net_device
*dev
);
2831 void netdev_change_features(struct net_device
*dev
);
2833 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2834 struct net_device
*dev
);
2836 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2838 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
2840 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2842 /* check flags correspondence */
2843 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2844 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2845 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2846 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2847 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2848 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2850 return (features
& feature
) == feature
;
2853 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2855 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2856 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2859 static inline bool netif_needs_gso(struct sk_buff
*skb
,
2860 netdev_features_t features
)
2862 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2863 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
2864 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
2867 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2870 dev
->gso_max_size
= size
;
2873 static inline bool netif_is_bond_master(struct net_device
*dev
)
2875 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
2878 static inline bool netif_is_bond_slave(struct net_device
*dev
)
2880 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2883 static inline bool netif_supports_nofcs(struct net_device
*dev
)
2885 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
2888 extern struct pernet_operations __net_initdata loopback_net_ops
;
2890 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2892 /* netdev_printk helpers, similar to dev_printk */
2894 static inline const char *netdev_name(const struct net_device
*dev
)
2896 if (dev
->reg_state
!= NETREG_REGISTERED
)
2897 return "(unregistered net_device)";
2901 extern __printf(3, 4)
2902 int netdev_printk(const char *level
, const struct net_device
*dev
,
2903 const char *format
, ...);
2904 extern __printf(2, 3)
2905 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2906 extern __printf(2, 3)
2907 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2908 extern __printf(2, 3)
2909 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2910 extern __printf(2, 3)
2911 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2912 extern __printf(2, 3)
2913 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2914 extern __printf(2, 3)
2915 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2916 extern __printf(2, 3)
2917 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2919 #define MODULE_ALIAS_NETDEV(device) \
2920 MODULE_ALIAS("netdev-" device)
2922 #if defined(CONFIG_DYNAMIC_DEBUG)
2923 #define netdev_dbg(__dev, format, args...) \
2925 dynamic_netdev_dbg(__dev, format, ##args); \
2927 #elif defined(DEBUG)
2928 #define netdev_dbg(__dev, format, args...) \
2929 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2931 #define netdev_dbg(__dev, format, args...) \
2934 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2939 #if defined(VERBOSE_DEBUG)
2940 #define netdev_vdbg netdev_dbg
2943 #define netdev_vdbg(dev, format, args...) \
2946 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2952 * netdev_WARN() acts like dev_printk(), but with the key difference
2953 * of using a WARN/WARN_ON to get the message out, including the
2954 * file/line information and a backtrace.
2956 #define netdev_WARN(dev, format, args...) \
2957 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2959 /* netif printk helpers, similar to netdev_printk */
2961 #define netif_printk(priv, type, level, dev, fmt, args...) \
2963 if (netif_msg_##type(priv)) \
2964 netdev_printk(level, (dev), fmt, ##args); \
2967 #define netif_level(level, priv, type, dev, fmt, args...) \
2969 if (netif_msg_##type(priv)) \
2970 netdev_##level(dev, fmt, ##args); \
2973 #define netif_emerg(priv, type, dev, fmt, args...) \
2974 netif_level(emerg, priv, type, dev, fmt, ##args)
2975 #define netif_alert(priv, type, dev, fmt, args...) \
2976 netif_level(alert, priv, type, dev, fmt, ##args)
2977 #define netif_crit(priv, type, dev, fmt, args...) \
2978 netif_level(crit, priv, type, dev, fmt, ##args)
2979 #define netif_err(priv, type, dev, fmt, args...) \
2980 netif_level(err, priv, type, dev, fmt, ##args)
2981 #define netif_warn(priv, type, dev, fmt, args...) \
2982 netif_level(warn, priv, type, dev, fmt, ##args)
2983 #define netif_notice(priv, type, dev, fmt, args...) \
2984 netif_level(notice, priv, type, dev, fmt, ##args)
2985 #define netif_info(priv, type, dev, fmt, args...) \
2986 netif_level(info, priv, type, dev, fmt, ##args)
2988 #if defined(CONFIG_DYNAMIC_DEBUG)
2989 #define netif_dbg(priv, type, netdev, format, args...) \
2991 if (netif_msg_##type(priv)) \
2992 dynamic_netdev_dbg(netdev, format, ##args); \
2994 #elif defined(DEBUG)
2995 #define netif_dbg(priv, type, dev, format, args...) \
2996 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2998 #define netif_dbg(priv, type, dev, format, args...) \
3001 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3006 #if defined(VERBOSE_DEBUG)
3007 #define netif_vdbg netif_dbg
3009 #define netif_vdbg(priv, type, dev, format, args...) \
3012 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3018 * The list of packet types we will receive (as opposed to discard)
3019 * and the routines to invoke.
3021 * Why 16. Because with 16 the only overlap we get on a hash of the
3022 * low nibble of the protocol value is RARP/SNAP/X.25.
3024 * NOTE: That is no longer true with the addition of VLAN tags. Not
3025 * sure which should go first, but I bet it won't make much
3026 * difference if we are running VLANs. The good news is that
3027 * this protocol won't be in the list unless compiled in, so
3028 * the average user (w/out VLANs) will not be adversely affected.
3044 #define PTYPE_HASH_SIZE (16)
3045 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3047 #endif /* _LINUX_NETDEVICE_H */