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/timer.h>
29 #include <linux/bug.h>
30 #include <linux/delay.h>
31 #include <linux/atomic.h>
32 #include <linux/prefetch.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>
53 #include <uapi/linux/if_bonding.h>
60 /* 802.15.4 specific */
64 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
65 const struct ethtool_ops
*ops
);
67 /* Backlog congestion levels */
68 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
69 #define NET_RX_DROP 1 /* packet dropped */
72 * Transmit return codes: transmit return codes originate from three different
75 * - qdisc return codes
76 * - driver transmit return codes
79 * Drivers are allowed to return any one of those in their hard_start_xmit()
80 * function. Real network devices commonly used with qdiscs should only return
81 * the driver transmit return codes though - when qdiscs are used, the actual
82 * transmission happens asynchronously, so the value is not propagated to
83 * higher layers. Virtual network devices transmit synchronously, in this case
84 * the driver transmit return codes are consumed by dev_queue_xmit(), all
85 * others are propagated to higher layers.
88 /* qdisc ->enqueue() return codes. */
89 #define NET_XMIT_SUCCESS 0x00
90 #define NET_XMIT_DROP 0x01 /* skb dropped */
91 #define NET_XMIT_CN 0x02 /* congestion notification */
92 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
93 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
95 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
96 * indicates that the device will soon be dropping packets, or already drops
97 * some packets of the same priority; prompting us to send less aggressively. */
98 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
99 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
101 /* Driver transmit return codes */
102 #define NETDEV_TX_MASK 0xf0
105 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
106 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
107 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
108 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
110 typedef enum netdev_tx netdev_tx_t
;
113 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
114 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
116 static inline bool dev_xmit_complete(int rc
)
119 * Positive cases with an skb consumed by a driver:
120 * - successful transmission (rc == NETDEV_TX_OK)
121 * - error while transmitting (rc < 0)
122 * - error while queueing to a different device (rc & NET_XMIT_MASK)
124 if (likely(rc
< NET_XMIT_MASK
))
131 * Compute the worst case header length according to the protocols
135 #if defined(CONFIG_HYPERV_NET)
136 # define LL_MAX_HEADER 128
137 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
138 # if defined(CONFIG_MAC80211_MESH)
139 # define LL_MAX_HEADER 128
141 # define LL_MAX_HEADER 96
144 # define LL_MAX_HEADER 32
147 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
148 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
149 #define MAX_HEADER LL_MAX_HEADER
151 #define MAX_HEADER (LL_MAX_HEADER + 48)
155 * Old network device statistics. Fields are native words
156 * (unsigned long) so they can be read and written atomically.
159 struct net_device_stats
{
160 unsigned long rx_packets
;
161 unsigned long tx_packets
;
162 unsigned long rx_bytes
;
163 unsigned long tx_bytes
;
164 unsigned long rx_errors
;
165 unsigned long tx_errors
;
166 unsigned long rx_dropped
;
167 unsigned long tx_dropped
;
168 unsigned long multicast
;
169 unsigned long collisions
;
170 unsigned long rx_length_errors
;
171 unsigned long rx_over_errors
;
172 unsigned long rx_crc_errors
;
173 unsigned long rx_frame_errors
;
174 unsigned long rx_fifo_errors
;
175 unsigned long rx_missed_errors
;
176 unsigned long tx_aborted_errors
;
177 unsigned long tx_carrier_errors
;
178 unsigned long tx_fifo_errors
;
179 unsigned long tx_heartbeat_errors
;
180 unsigned long tx_window_errors
;
181 unsigned long rx_compressed
;
182 unsigned long tx_compressed
;
186 #include <linux/cache.h>
187 #include <linux/skbuff.h>
190 #include <linux/static_key.h>
191 extern struct static_key rps_needed
;
198 struct netdev_hw_addr
{
199 struct list_head list
;
200 unsigned char addr
[MAX_ADDR_LEN
];
202 #define NETDEV_HW_ADDR_T_LAN 1
203 #define NETDEV_HW_ADDR_T_SAN 2
204 #define NETDEV_HW_ADDR_T_SLAVE 3
205 #define NETDEV_HW_ADDR_T_UNICAST 4
206 #define NETDEV_HW_ADDR_T_MULTICAST 5
211 struct rcu_head rcu_head
;
214 struct netdev_hw_addr_list
{
215 struct list_head list
;
219 #define netdev_hw_addr_list_count(l) ((l)->count)
220 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
221 #define netdev_hw_addr_list_for_each(ha, l) \
222 list_for_each_entry(ha, &(l)->list, list)
224 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
225 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
226 #define netdev_for_each_uc_addr(ha, dev) \
227 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
229 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
230 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
231 #define netdev_for_each_mc_addr(ha, dev) \
232 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
239 /* cached hardware header; allow for machine alignment needs. */
240 #define HH_DATA_MOD 16
241 #define HH_DATA_OFF(__len) \
242 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
243 #define HH_DATA_ALIGN(__len) \
244 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
245 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
248 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
250 * dev->hard_header_len ? (dev->hard_header_len +
251 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
253 * We could use other alignment values, but we must maintain the
254 * relationship HH alignment <= LL alignment.
256 #define LL_RESERVED_SPACE(dev) \
257 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
258 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
259 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
263 unsigned short type
, const void *daddr
,
264 const void *saddr
, unsigned int len
);
265 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
266 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
267 void (*cache_update
)(struct hh_cache
*hh
,
268 const struct net_device
*dev
,
269 const unsigned char *haddr
);
272 /* These flag bits are private to the generic network queueing
273 * layer, they may not be explicitly referenced by any other
277 enum netdev_state_t
{
279 __LINK_STATE_PRESENT
,
280 __LINK_STATE_NOCARRIER
,
281 __LINK_STATE_LINKWATCH_PENDING
,
282 __LINK_STATE_DORMANT
,
287 * This structure holds at boot time configured netdevice settings. They
288 * are then used in the device probing.
290 struct netdev_boot_setup
{
294 #define NETDEV_BOOT_SETUP_MAX 8
296 int __init
netdev_boot_setup(char *str
);
299 * Structure for NAPI scheduling similar to tasklet but with weighting
302 /* The poll_list must only be managed by the entity which
303 * changes the state of the NAPI_STATE_SCHED bit. This means
304 * whoever atomically sets that bit can add this napi_struct
305 * to the per-cpu poll_list, and whoever clears that bit
306 * can remove from the list right before clearing the bit.
308 struct list_head poll_list
;
312 unsigned int gro_count
;
313 int (*poll
)(struct napi_struct
*, int);
314 #ifdef CONFIG_NETPOLL
315 spinlock_t poll_lock
;
318 struct net_device
*dev
;
319 struct sk_buff
*gro_list
;
321 struct hrtimer timer
;
322 struct list_head dev_list
;
323 struct hlist_node napi_hash_node
;
324 unsigned int napi_id
;
328 NAPI_STATE_SCHED
, /* Poll is scheduled */
329 NAPI_STATE_DISABLE
, /* Disable pending */
330 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
331 NAPI_STATE_HASHED
, /* In NAPI hash (busy polling possible) */
332 NAPI_STATE_NO_BUSY_POLL
,/* Do not add in napi_hash, no busy polling */
342 typedef enum gro_result gro_result_t
;
345 * enum rx_handler_result - Possible return values for rx_handlers.
346 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
348 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
349 * case skb->dev was changed by rx_handler.
350 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
351 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
353 * rx_handlers are functions called from inside __netif_receive_skb(), to do
354 * special processing of the skb, prior to delivery to protocol handlers.
356 * Currently, a net_device can only have a single rx_handler registered. Trying
357 * to register a second rx_handler will return -EBUSY.
359 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
360 * To unregister a rx_handler on a net_device, use
361 * netdev_rx_handler_unregister().
363 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
366 * If the rx_handler consumed to skb in some way, it should return
367 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
368 * the skb to be delivered in some other ways.
370 * If the rx_handler changed skb->dev, to divert the skb to another
371 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
372 * new device will be called if it exists.
374 * If the rx_handler consider the skb should be ignored, it should return
375 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
376 * are registered on exact device (ptype->dev == skb->dev).
378 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
379 * delivered, it should return RX_HANDLER_PASS.
381 * A device without a registered rx_handler will behave as if rx_handler
382 * returned RX_HANDLER_PASS.
385 enum rx_handler_result
{
391 typedef enum rx_handler_result rx_handler_result_t
;
392 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
394 void __napi_schedule(struct napi_struct
*n
);
395 void __napi_schedule_irqoff(struct napi_struct
*n
);
397 static inline bool napi_disable_pending(struct napi_struct
*n
)
399 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
403 * napi_schedule_prep - check if napi can be scheduled
406 * Test if NAPI routine is already running, and if not mark
407 * it as running. This is used as a condition variable
408 * insure only one NAPI poll instance runs. We also make
409 * sure there is no pending NAPI disable.
411 static inline bool napi_schedule_prep(struct napi_struct
*n
)
413 return !napi_disable_pending(n
) &&
414 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
418 * napi_schedule - schedule NAPI poll
421 * Schedule NAPI poll routine to be called if it is not already
424 static inline void napi_schedule(struct napi_struct
*n
)
426 if (napi_schedule_prep(n
))
431 * napi_schedule_irqoff - schedule NAPI poll
434 * Variant of napi_schedule(), assuming hard irqs are masked.
436 static inline void napi_schedule_irqoff(struct napi_struct
*n
)
438 if (napi_schedule_prep(n
))
439 __napi_schedule_irqoff(n
);
442 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
443 static inline bool napi_reschedule(struct napi_struct
*napi
)
445 if (napi_schedule_prep(napi
)) {
446 __napi_schedule(napi
);
452 void __napi_complete(struct napi_struct
*n
);
453 void napi_complete_done(struct napi_struct
*n
, int work_done
);
455 * napi_complete - NAPI processing complete
458 * Mark NAPI processing as complete.
459 * Consider using napi_complete_done() instead.
461 static inline void napi_complete(struct napi_struct
*n
)
463 return napi_complete_done(n
, 0);
467 * napi_hash_add - add a NAPI to global hashtable
468 * @napi: napi context
470 * generate a new napi_id and store a @napi under it in napi_hash
471 * Used for busy polling (CONFIG_NET_RX_BUSY_POLL)
472 * Note: This is normally automatically done from netif_napi_add(),
473 * so might disappear in a future linux version.
475 void napi_hash_add(struct napi_struct
*napi
);
478 * napi_hash_del - remove a NAPI from global table
479 * @napi: napi context
481 * Warning: caller must observe rcu grace period
482 * before freeing memory containing @napi, if
483 * this function returns true.
484 * Note: core networking stack automatically calls it
485 * from netif_napi_del()
486 * Drivers might want to call this helper to combine all
487 * the needed rcu grace periods into a single one.
489 bool napi_hash_del(struct napi_struct
*napi
);
492 * napi_disable - prevent NAPI from scheduling
495 * Stop NAPI from being scheduled on this context.
496 * Waits till any outstanding processing completes.
498 void napi_disable(struct napi_struct
*n
);
501 * napi_enable - enable NAPI scheduling
504 * Resume NAPI from being scheduled on this context.
505 * Must be paired with napi_disable.
507 static inline void napi_enable(struct napi_struct
*n
)
509 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
510 smp_mb__before_atomic();
511 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
512 clear_bit(NAPI_STATE_NPSVC
, &n
->state
);
517 * napi_synchronize - wait until NAPI is not running
520 * Wait until NAPI is done being scheduled on this context.
521 * Waits till any outstanding processing completes but
522 * does not disable future activations.
524 static inline void napi_synchronize(const struct napi_struct
*n
)
526 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
530 # define napi_synchronize(n) barrier()
533 enum netdev_queue_state_t
{
534 __QUEUE_STATE_DRV_XOFF
,
535 __QUEUE_STATE_STACK_XOFF
,
536 __QUEUE_STATE_FROZEN
,
539 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
540 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
541 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
543 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
544 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
546 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
550 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
551 * netif_tx_* functions below are used to manipulate this flag. The
552 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
553 * queue independently. The netif_xmit_*stopped functions below are called
554 * to check if the queue has been stopped by the driver or stack (either
555 * of the XOFF bits are set in the state). Drivers should not need to call
556 * netif_xmit*stopped functions, they should only be using netif_tx_*.
559 struct netdev_queue
{
563 struct net_device
*dev
;
564 struct Qdisc __rcu
*qdisc
;
565 struct Qdisc
*qdisc_sleeping
;
569 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
575 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
578 * please use this field instead of dev->trans_start
580 unsigned long trans_start
;
583 * Number of TX timeouts for this queue
584 * (/sys/class/net/DEV/Q/trans_timeout)
586 unsigned long trans_timeout
;
593 unsigned long tx_maxrate
;
594 } ____cacheline_aligned_in_smp
;
596 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
598 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
605 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
607 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
614 * This structure holds an RPS map which can be of variable length. The
615 * map is an array of CPUs.
622 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
625 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
626 * tail pointer for that CPU's input queue at the time of last enqueue, and
627 * a hardware filter index.
629 struct rps_dev_flow
{
632 unsigned int last_qtail
;
634 #define RPS_NO_FILTER 0xffff
637 * The rps_dev_flow_table structure contains a table of flow mappings.
639 struct rps_dev_flow_table
{
642 struct rps_dev_flow flows
[0];
644 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
645 ((_num) * sizeof(struct rps_dev_flow)))
648 * The rps_sock_flow_table contains mappings of flows to the last CPU
649 * on which they were processed by the application (set in recvmsg).
650 * Each entry is a 32bit value. Upper part is the high order bits
651 * of flow hash, lower part is cpu number.
652 * rps_cpu_mask is used to partition the space, depending on number of
653 * possible cpus : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
654 * For example, if 64 cpus are possible, rps_cpu_mask = 0x3f,
655 * meaning we use 32-6=26 bits for the hash.
657 struct rps_sock_flow_table
{
660 u32 ents
[0] ____cacheline_aligned_in_smp
;
662 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
664 #define RPS_NO_CPU 0xffff
666 extern u32 rps_cpu_mask
;
667 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
669 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
673 unsigned int index
= hash
& table
->mask
;
674 u32 val
= hash
& ~rps_cpu_mask
;
676 /* We only give a hint, preemption can change cpu under us */
677 val
|= raw_smp_processor_id();
679 if (table
->ents
[index
] != val
)
680 table
->ents
[index
] = val
;
684 #ifdef CONFIG_RFS_ACCEL
685 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
688 #endif /* CONFIG_RPS */
690 /* This structure contains an instance of an RX queue. */
691 struct netdev_rx_queue
{
693 struct rps_map __rcu
*rps_map
;
694 struct rps_dev_flow_table __rcu
*rps_flow_table
;
697 struct net_device
*dev
;
698 } ____cacheline_aligned_in_smp
;
701 * RX queue sysfs structures and functions.
703 struct rx_queue_attribute
{
704 struct attribute attr
;
705 ssize_t (*show
)(struct netdev_rx_queue
*queue
,
706 struct rx_queue_attribute
*attr
, char *buf
);
707 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
708 struct rx_queue_attribute
*attr
, const char *buf
, size_t len
);
713 * This structure holds an XPS map which can be of variable length. The
714 * map is an array of queues.
718 unsigned int alloc_len
;
722 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
723 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
724 - sizeof(struct xps_map)) / sizeof(u16))
727 * This structure holds all XPS maps for device. Maps are indexed by CPU.
729 struct xps_dev_maps
{
731 struct xps_map __rcu
*cpu_map
[0];
733 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
734 (nr_cpu_ids * sizeof(struct xps_map *)))
735 #endif /* CONFIG_XPS */
737 #define TC_MAX_QUEUE 16
738 #define TC_BITMASK 15
739 /* HW offloaded queuing disciplines txq count and offset maps */
740 struct netdev_tc_txq
{
745 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
747 * This structure is to hold information about the device
748 * configured to run FCoE protocol stack.
750 struct netdev_fcoe_hbainfo
{
751 char manufacturer
[64];
752 char serial_number
[64];
753 char hardware_version
[64];
754 char driver_version
[64];
755 char optionrom_version
[64];
756 char firmware_version
[64];
758 char model_description
[256];
762 #define MAX_PHYS_ITEM_ID_LEN 32
764 /* This structure holds a unique identifier to identify some
765 * physical item (port for example) used by a netdevice.
767 struct netdev_phys_item_id
{
768 unsigned char id
[MAX_PHYS_ITEM_ID_LEN
];
769 unsigned char id_len
;
772 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id
*a
,
773 struct netdev_phys_item_id
*b
)
775 return a
->id_len
== b
->id_len
&&
776 memcmp(a
->id
, b
->id
, a
->id_len
) == 0;
779 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
780 struct sk_buff
*skb
);
783 * This structure defines the management hooks for network devices.
784 * The following hooks can be defined; unless noted otherwise, they are
785 * optional and can be filled with a null pointer.
787 * int (*ndo_init)(struct net_device *dev);
788 * This function is called once when network device is registered.
789 * The network device can use this to any late stage initializaton
790 * or semantic validattion. It can fail with an error code which will
791 * be propogated back to register_netdev
793 * void (*ndo_uninit)(struct net_device *dev);
794 * This function is called when device is unregistered or when registration
795 * fails. It is not called if init fails.
797 * int (*ndo_open)(struct net_device *dev);
798 * This function is called when network device transistions to the up
801 * int (*ndo_stop)(struct net_device *dev);
802 * This function is called when network device transistions to the down
805 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
806 * struct net_device *dev);
807 * Called when a packet needs to be transmitted.
808 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
809 * the queue before that can happen; it's for obsolete devices and weird
810 * corner cases, but the stack really does a non-trivial amount
811 * of useless work if you return NETDEV_TX_BUSY.
812 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
813 * Required can not be NULL.
815 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
816 * void *accel_priv, select_queue_fallback_t fallback);
817 * Called to decide which queue to when device supports multiple
820 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
821 * This function is called to allow device receiver to make
822 * changes to configuration when multicast or promiscious is enabled.
824 * void (*ndo_set_rx_mode)(struct net_device *dev);
825 * This function is called device changes address list filtering.
826 * If driver handles unicast address filtering, it should set
827 * IFF_UNICAST_FLT to its priv_flags.
829 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
830 * This function is called when the Media Access Control address
831 * needs to be changed. If this interface is not defined, the
832 * mac address can not be changed.
834 * int (*ndo_validate_addr)(struct net_device *dev);
835 * Test if Media Access Control address is valid for the device.
837 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
838 * Called when a user request an ioctl which can't be handled by
839 * the generic interface code. If not defined ioctl's return
840 * not supported error code.
842 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
843 * Used to set network devices bus interface parameters. This interface
844 * is retained for legacy reason, new devices should use the bus
845 * interface (PCI) for low level management.
847 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
848 * Called when a user wants to change the Maximum Transfer Unit
849 * of a device. If not defined, any request to change MTU will
850 * will return an error.
852 * void (*ndo_tx_timeout)(struct net_device *dev);
853 * Callback uses when the transmitter has not made any progress
854 * for dev->watchdog ticks.
856 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
857 * struct rtnl_link_stats64 *storage);
858 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
859 * Called when a user wants to get the network device usage
860 * statistics. Drivers must do one of the following:
861 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
862 * rtnl_link_stats64 structure passed by the caller.
863 * 2. Define @ndo_get_stats to update a net_device_stats structure
864 * (which should normally be dev->stats) and return a pointer to
865 * it. The structure may be changed asynchronously only if each
866 * field is written atomically.
867 * 3. Update dev->stats asynchronously and atomically, and define
870 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
871 * If device support VLAN filtering this function is called when a
872 * VLAN id is registered.
874 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
875 * If device support VLAN filtering this function is called when a
876 * VLAN id is unregistered.
878 * void (*ndo_poll_controller)(struct net_device *dev);
880 * SR-IOV management functions.
881 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
882 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
883 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
885 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
886 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
887 * int (*ndo_get_vf_config)(struct net_device *dev,
888 * int vf, struct ifla_vf_info *ivf);
889 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
890 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
891 * struct nlattr *port[]);
893 * Enable or disable the VF ability to query its RSS Redirection Table and
894 * Hash Key. This is needed since on some devices VF share this information
895 * with PF and querying it may adduce a theoretical security risk.
896 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
897 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
898 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
899 * Called to setup 'tc' number of traffic classes in the net device. This
900 * is always called from the stack with the rtnl lock held and netif tx
901 * queues stopped. This allows the netdevice to perform queue management
904 * Fiber Channel over Ethernet (FCoE) offload functions.
905 * int (*ndo_fcoe_enable)(struct net_device *dev);
906 * Called when the FCoE protocol stack wants to start using LLD for FCoE
907 * so the underlying device can perform whatever needed configuration or
908 * initialization to support acceleration of FCoE traffic.
910 * int (*ndo_fcoe_disable)(struct net_device *dev);
911 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
912 * so the underlying device can perform whatever needed clean-ups to
913 * stop supporting acceleration of FCoE traffic.
915 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
916 * struct scatterlist *sgl, unsigned int sgc);
917 * Called when the FCoE Initiator wants to initialize an I/O that
918 * is a possible candidate for Direct Data Placement (DDP). The LLD can
919 * perform necessary setup and returns 1 to indicate the device is set up
920 * successfully to perform DDP on this I/O, otherwise this returns 0.
922 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
923 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
924 * indicated by the FC exchange id 'xid', so the underlying device can
925 * clean up and reuse resources for later DDP requests.
927 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
928 * struct scatterlist *sgl, unsigned int sgc);
929 * Called when the FCoE Target wants to initialize an I/O that
930 * is a possible candidate for Direct Data Placement (DDP). The LLD can
931 * perform necessary setup and returns 1 to indicate the device is set up
932 * successfully to perform DDP on this I/O, otherwise this returns 0.
934 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
935 * struct netdev_fcoe_hbainfo *hbainfo);
936 * Called when the FCoE Protocol stack wants information on the underlying
937 * device. This information is utilized by the FCoE protocol stack to
938 * register attributes with Fiber Channel management service as per the
939 * FC-GS Fabric Device Management Information(FDMI) specification.
941 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
942 * Called when the underlying device wants to override default World Wide
943 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
944 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
945 * protocol stack to use.
948 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
949 * u16 rxq_index, u32 flow_id);
950 * Set hardware filter for RFS. rxq_index is the target queue index;
951 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
952 * Return the filter ID on success, or a negative error code.
954 * Slave management functions (for bridge, bonding, etc).
955 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
956 * Called to make another netdev an underling.
958 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
959 * Called to release previously enslaved netdev.
961 * Feature/offload setting functions.
962 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
963 * netdev_features_t features);
964 * Adjusts the requested feature flags according to device-specific
965 * constraints, and returns the resulting flags. Must not modify
968 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
969 * Called to update device configuration to new features. Passed
970 * feature set might be less than what was returned by ndo_fix_features()).
971 * Must return >0 or -errno if it changed dev->features itself.
973 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
974 * struct net_device *dev,
975 * const unsigned char *addr, u16 vid, u16 flags)
976 * Adds an FDB entry to dev for addr.
977 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
978 * struct net_device *dev,
979 * const unsigned char *addr, u16 vid)
980 * Deletes the FDB entry from dev coresponding to addr.
981 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
982 * struct net_device *dev, struct net_device *filter_dev,
984 * Used to add FDB entries to dump requests. Implementers should add
985 * entries to skb and update idx with the number of entries.
987 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
989 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
990 * struct net_device *dev, u32 filter_mask,
992 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
995 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
996 * Called to change device carrier. Soft-devices (like dummy, team, etc)
997 * which do not represent real hardware may define this to allow their
998 * userspace components to manage their virtual carrier state. Devices
999 * that determine carrier state from physical hardware properties (eg
1000 * network cables) or protocol-dependent mechanisms (eg
1001 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1003 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1004 * struct netdev_phys_item_id *ppid);
1005 * Called to get ID of physical port of this device. If driver does
1006 * not implement this, it is assumed that the hw is not able to have
1007 * multiple net devices on single physical port.
1009 * void (*ndo_add_vxlan_port)(struct net_device *dev,
1010 * sa_family_t sa_family, __be16 port);
1011 * Called by vxlan to notiy a driver about the UDP port and socket
1012 * address family that vxlan is listnening to. It is called only when
1013 * a new port starts listening. The operation is protected by the
1014 * vxlan_net->sock_lock.
1016 * void (*ndo_del_vxlan_port)(struct net_device *dev,
1017 * sa_family_t sa_family, __be16 port);
1018 * Called by vxlan to notify the driver about a UDP port and socket
1019 * address family that vxlan is not listening to anymore. The operation
1020 * is protected by the vxlan_net->sock_lock.
1022 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1023 * struct net_device *dev)
1024 * Called by upper layer devices to accelerate switching or other
1025 * station functionality into hardware. 'pdev is the lowerdev
1026 * to use for the offload and 'dev' is the net device that will
1027 * back the offload. Returns a pointer to the private structure
1028 * the upper layer will maintain.
1029 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1030 * Called by upper layer device to delete the station created
1031 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1032 * the station and priv is the structure returned by the add
1034 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
1035 * struct net_device *dev,
1037 * Callback to use for xmit over the accelerated station. This
1038 * is used in place of ndo_start_xmit on accelerated net
1040 * netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
1041 * struct net_device *dev
1042 * netdev_features_t features);
1043 * Called by core transmit path to determine if device is capable of
1044 * performing offload operations on a given packet. This is to give
1045 * the device an opportunity to implement any restrictions that cannot
1046 * be otherwise expressed by feature flags. The check is called with
1047 * the set of features that the stack has calculated and it returns
1048 * those the driver believes to be appropriate.
1049 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1050 * int queue_index, u32 maxrate);
1051 * Called when a user wants to set a max-rate limitation of specific
1053 * int (*ndo_get_iflink)(const struct net_device *dev);
1054 * Called to get the iflink value of this device.
1055 * void (*ndo_change_proto_down)(struct net_device *dev,
1057 * This function is used to pass protocol port error state information
1058 * to the switch driver. The switch driver can react to the proto_down
1059 * by doing a phys down on the associated switch port.
1060 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1061 * This function is used to get egress tunnel information for given skb.
1062 * This is useful for retrieving outer tunnel header parameters while
1066 struct net_device_ops
{
1067 int (*ndo_init
)(struct net_device
*dev
);
1068 void (*ndo_uninit
)(struct net_device
*dev
);
1069 int (*ndo_open
)(struct net_device
*dev
);
1070 int (*ndo_stop
)(struct net_device
*dev
);
1071 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
1072 struct net_device
*dev
);
1073 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1074 struct sk_buff
*skb
,
1076 select_queue_fallback_t fallback
);
1077 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1079 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1080 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1082 int (*ndo_validate_addr
)(struct net_device
*dev
);
1083 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1084 struct ifreq
*ifr
, int cmd
);
1085 int (*ndo_set_config
)(struct net_device
*dev
,
1087 int (*ndo_change_mtu
)(struct net_device
*dev
,
1089 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1090 struct neigh_parms
*);
1091 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1093 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
1094 struct rtnl_link_stats64
*storage
);
1095 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1097 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1098 __be16 proto
, u16 vid
);
1099 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1100 __be16 proto
, u16 vid
);
1101 #ifdef CONFIG_NET_POLL_CONTROLLER
1102 void (*ndo_poll_controller
)(struct net_device
*dev
);
1103 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1104 struct netpoll_info
*info
);
1105 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1107 #ifdef CONFIG_NET_RX_BUSY_POLL
1108 int (*ndo_busy_poll
)(struct napi_struct
*dev
);
1110 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1111 int queue
, u8
*mac
);
1112 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1113 int queue
, u16 vlan
, u8 qos
);
1114 int (*ndo_set_vf_rate
)(struct net_device
*dev
,
1115 int vf
, int min_tx_rate
,
1117 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1118 int vf
, bool setting
);
1119 int (*ndo_set_vf_trust
)(struct net_device
*dev
,
1120 int vf
, bool setting
);
1121 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1123 struct ifla_vf_info
*ivf
);
1124 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1125 int vf
, int link_state
);
1126 int (*ndo_get_vf_stats
)(struct net_device
*dev
,
1128 struct ifla_vf_stats
1130 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1132 struct nlattr
*port
[]);
1133 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1134 int vf
, struct sk_buff
*skb
);
1135 int (*ndo_set_vf_rss_query_en
)(
1136 struct net_device
*dev
,
1137 int vf
, bool setting
);
1138 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
1139 #if IS_ENABLED(CONFIG_FCOE)
1140 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1141 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1142 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1144 struct scatterlist
*sgl
,
1146 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1148 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1150 struct scatterlist
*sgl
,
1152 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1153 struct netdev_fcoe_hbainfo
*hbainfo
);
1156 #if IS_ENABLED(CONFIG_LIBFCOE)
1157 #define NETDEV_FCOE_WWNN 0
1158 #define NETDEV_FCOE_WWPN 1
1159 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1160 u64
*wwn
, int type
);
1163 #ifdef CONFIG_RFS_ACCEL
1164 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1165 const struct sk_buff
*skb
,
1169 int (*ndo_add_slave
)(struct net_device
*dev
,
1170 struct net_device
*slave_dev
);
1171 int (*ndo_del_slave
)(struct net_device
*dev
,
1172 struct net_device
*slave_dev
);
1173 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1174 netdev_features_t features
);
1175 int (*ndo_set_features
)(struct net_device
*dev
,
1176 netdev_features_t features
);
1177 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1178 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1180 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1181 struct nlattr
*tb
[],
1182 struct net_device
*dev
,
1183 const unsigned char *addr
,
1186 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1187 struct nlattr
*tb
[],
1188 struct net_device
*dev
,
1189 const unsigned char *addr
,
1191 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1192 struct netlink_callback
*cb
,
1193 struct net_device
*dev
,
1194 struct net_device
*filter_dev
,
1197 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1198 struct nlmsghdr
*nlh
,
1200 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1202 struct net_device
*dev
,
1205 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1206 struct nlmsghdr
*nlh
,
1208 int (*ndo_change_carrier
)(struct net_device
*dev
,
1210 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1211 struct netdev_phys_item_id
*ppid
);
1212 int (*ndo_get_phys_port_name
)(struct net_device
*dev
,
1213 char *name
, size_t len
);
1214 void (*ndo_add_vxlan_port
)(struct net_device
*dev
,
1215 sa_family_t sa_family
,
1217 void (*ndo_del_vxlan_port
)(struct net_device
*dev
,
1218 sa_family_t sa_family
,
1221 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1222 struct net_device
*dev
);
1223 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1226 netdev_tx_t (*ndo_dfwd_start_xmit
) (struct sk_buff
*skb
,
1227 struct net_device
*dev
,
1229 int (*ndo_get_lock_subclass
)(struct net_device
*dev
);
1230 netdev_features_t (*ndo_features_check
) (struct sk_buff
*skb
,
1231 struct net_device
*dev
,
1232 netdev_features_t features
);
1233 int (*ndo_set_tx_maxrate
)(struct net_device
*dev
,
1236 int (*ndo_get_iflink
)(const struct net_device
*dev
);
1237 int (*ndo_change_proto_down
)(struct net_device
*dev
,
1239 int (*ndo_fill_metadata_dst
)(struct net_device
*dev
,
1240 struct sk_buff
*skb
);
1244 * enum net_device_priv_flags - &struct net_device priv_flags
1246 * These are the &struct net_device, they are only set internally
1247 * by drivers and used in the kernel. These flags are invisible to
1248 * userspace, this means that the order of these flags can change
1249 * during any kernel release.
1251 * You should have a pretty good reason to be extending these flags.
1253 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1254 * @IFF_EBRIDGE: Ethernet bridging device
1255 * @IFF_BONDING: bonding master or slave
1256 * @IFF_ISATAP: ISATAP interface (RFC4214)
1257 * @IFF_WAN_HDLC: WAN HDLC device
1258 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1260 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1261 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1262 * @IFF_MACVLAN_PORT: device used as macvlan port
1263 * @IFF_BRIDGE_PORT: device used as bridge port
1264 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1265 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1266 * @IFF_UNICAST_FLT: Supports unicast filtering
1267 * @IFF_TEAM_PORT: device used as team port
1268 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1269 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1270 * change when it's running
1271 * @IFF_MACVLAN: Macvlan device
1272 * @IFF_L3MDEV_MASTER: device is an L3 master device
1273 * @IFF_NO_QUEUE: device can run without qdisc attached
1274 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1275 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1276 * @IFF_TEAM: device is a team device
1278 enum netdev_priv_flags
{
1279 IFF_802_1Q_VLAN
= 1<<0,
1283 IFF_WAN_HDLC
= 1<<4,
1284 IFF_XMIT_DST_RELEASE
= 1<<5,
1285 IFF_DONT_BRIDGE
= 1<<6,
1286 IFF_DISABLE_NETPOLL
= 1<<7,
1287 IFF_MACVLAN_PORT
= 1<<8,
1288 IFF_BRIDGE_PORT
= 1<<9,
1289 IFF_OVS_DATAPATH
= 1<<10,
1290 IFF_TX_SKB_SHARING
= 1<<11,
1291 IFF_UNICAST_FLT
= 1<<12,
1292 IFF_TEAM_PORT
= 1<<13,
1293 IFF_SUPP_NOFCS
= 1<<14,
1294 IFF_LIVE_ADDR_CHANGE
= 1<<15,
1295 IFF_MACVLAN
= 1<<16,
1296 IFF_XMIT_DST_RELEASE_PERM
= 1<<17,
1297 IFF_IPVLAN_MASTER
= 1<<18,
1298 IFF_IPVLAN_SLAVE
= 1<<19,
1299 IFF_L3MDEV_MASTER
= 1<<20,
1300 IFF_NO_QUEUE
= 1<<21,
1301 IFF_OPENVSWITCH
= 1<<22,
1302 IFF_L3MDEV_SLAVE
= 1<<23,
1306 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1307 #define IFF_EBRIDGE IFF_EBRIDGE
1308 #define IFF_BONDING IFF_BONDING
1309 #define IFF_ISATAP IFF_ISATAP
1310 #define IFF_WAN_HDLC IFF_WAN_HDLC
1311 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1312 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1313 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1314 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1315 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1316 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1317 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1318 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1319 #define IFF_TEAM_PORT IFF_TEAM_PORT
1320 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1321 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1322 #define IFF_MACVLAN IFF_MACVLAN
1323 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1324 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1325 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1326 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1327 #define IFF_NO_QUEUE IFF_NO_QUEUE
1328 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1329 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1330 #define IFF_TEAM IFF_TEAM
1333 * struct net_device - The DEVICE structure.
1334 * Actually, this whole structure is a big mistake. It mixes I/O
1335 * data with strictly "high-level" data, and it has to know about
1336 * almost every data structure used in the INET module.
1338 * @name: This is the first field of the "visible" part of this structure
1339 * (i.e. as seen by users in the "Space.c" file). It is the name
1342 * @name_hlist: Device name hash chain, please keep it close to name[]
1343 * @ifalias: SNMP alias
1344 * @mem_end: Shared memory end
1345 * @mem_start: Shared memory start
1346 * @base_addr: Device I/O address
1347 * @irq: Device IRQ number
1349 * @carrier_changes: Stats to monitor carrier on<->off transitions
1351 * @state: Generic network queuing layer state, see netdev_state_t
1352 * @dev_list: The global list of network devices
1353 * @napi_list: List entry, that is used for polling napi devices
1354 * @unreg_list: List entry, that is used, when we are unregistering the
1355 * device, see the function unregister_netdev
1356 * @close_list: List entry, that is used, when we are closing the device
1358 * @adj_list: Directly linked devices, like slaves for bonding
1359 * @all_adj_list: All linked devices, *including* neighbours
1360 * @features: Currently active device features
1361 * @hw_features: User-changeable features
1363 * @wanted_features: User-requested features
1364 * @vlan_features: Mask of features inheritable by VLAN devices
1366 * @hw_enc_features: Mask of features inherited by encapsulating devices
1367 * This field indicates what encapsulation
1368 * offloads the hardware is capable of doing,
1369 * and drivers will need to set them appropriately.
1371 * @mpls_features: Mask of features inheritable by MPLS
1373 * @ifindex: interface index
1374 * @group: The group, that the device belongs to
1376 * @stats: Statistics struct, which was left as a legacy, use
1377 * rtnl_link_stats64 instead
1379 * @rx_dropped: Dropped packets by core network,
1380 * do not use this in drivers
1381 * @tx_dropped: Dropped packets by core network,
1382 * do not use this in drivers
1384 * @wireless_handlers: List of functions to handle Wireless Extensions,
1386 * see <net/iw_handler.h> for details.
1387 * @wireless_data: Instance data managed by the core of wireless extensions
1389 * @netdev_ops: Includes several pointers to callbacks,
1390 * if one wants to override the ndo_*() functions
1391 * @ethtool_ops: Management operations
1392 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1393 * of Layer 2 headers.
1395 * @flags: Interface flags (a la BSD)
1396 * @priv_flags: Like 'flags' but invisible to userspace,
1397 * see if.h for the definitions
1398 * @gflags: Global flags ( kept as legacy )
1399 * @padded: How much padding added by alloc_netdev()
1400 * @operstate: RFC2863 operstate
1401 * @link_mode: Mapping policy to operstate
1402 * @if_port: Selectable AUI, TP, ...
1404 * @mtu: Interface MTU value
1405 * @type: Interface hardware type
1406 * @hard_header_len: Hardware header length
1408 * @needed_headroom: Extra headroom the hardware may need, but not in all
1409 * cases can this be guaranteed
1410 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1411 * cases can this be guaranteed. Some cases also use
1412 * LL_MAX_HEADER instead to allocate the skb
1414 * interface address info:
1416 * @perm_addr: Permanent hw address
1417 * @addr_assign_type: Hw address assignment type
1418 * @addr_len: Hardware address length
1419 * @neigh_priv_len; Used in neigh_alloc(),
1420 * initialized only in atm/clip.c
1421 * @dev_id: Used to differentiate devices that share
1422 * the same link layer address
1423 * @dev_port: Used to differentiate devices that share
1425 * @addr_list_lock: XXX: need comments on this one
1426 * @uc_promisc: Counter, that indicates, that promiscuous mode
1427 * has been enabled due to the need to listen to
1428 * additional unicast addresses in a device that
1429 * does not implement ndo_set_rx_mode()
1430 * @uc: unicast mac addresses
1431 * @mc: multicast mac addresses
1432 * @dev_addrs: list of device hw addresses
1433 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1434 * @promiscuity: Number of times, the NIC is told to work in
1435 * Promiscuous mode, if it becomes 0 the NIC will
1436 * exit from working in Promiscuous mode
1437 * @allmulti: Counter, enables or disables allmulticast mode
1439 * @vlan_info: VLAN info
1440 * @dsa_ptr: dsa specific data
1441 * @tipc_ptr: TIPC specific data
1442 * @atalk_ptr: AppleTalk link
1443 * @ip_ptr: IPv4 specific data
1444 * @dn_ptr: DECnet specific data
1445 * @ip6_ptr: IPv6 specific data
1446 * @ax25_ptr: AX.25 specific data
1447 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1449 * @last_rx: Time of last Rx
1450 * @dev_addr: Hw address (before bcast,
1451 * because most packets are unicast)
1453 * @_rx: Array of RX queues
1454 * @num_rx_queues: Number of RX queues
1455 * allocated at register_netdev() time
1456 * @real_num_rx_queues: Number of RX queues currently active in device
1458 * @rx_handler: handler for received packets
1459 * @rx_handler_data: XXX: need comments on this one
1460 * @ingress_queue: XXX: need comments on this one
1461 * @broadcast: hw bcast address
1463 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1464 * indexed by RX queue number. Assigned by driver.
1465 * This must only be set if the ndo_rx_flow_steer
1466 * operation is defined
1467 * @index_hlist: Device index hash chain
1469 * @_tx: Array of TX queues
1470 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1471 * @real_num_tx_queues: Number of TX queues currently active in device
1472 * @qdisc: Root qdisc from userspace point of view
1473 * @tx_queue_len: Max frames per queue allowed
1474 * @tx_global_lock: XXX: need comments on this one
1476 * @xps_maps: XXX: need comments on this one
1478 * @offload_fwd_mark: Offload device fwding mark
1480 * @trans_start: Time (in jiffies) of last Tx
1481 * @watchdog_timeo: Represents the timeout that is used by
1482 * the watchdog ( see dev_watchdog() )
1483 * @watchdog_timer: List of timers
1485 * @pcpu_refcnt: Number of references to this device
1486 * @todo_list: Delayed register/unregister
1487 * @link_watch_list: XXX: need comments on this one
1489 * @reg_state: Register/unregister state machine
1490 * @dismantle: Device is going to be freed
1491 * @rtnl_link_state: This enum represents the phases of creating
1494 * @destructor: Called from unregister,
1495 * can be used to call free_netdev
1496 * @npinfo: XXX: need comments on this one
1497 * @nd_net: Network namespace this network device is inside
1499 * @ml_priv: Mid-layer private
1500 * @lstats: Loopback statistics
1501 * @tstats: Tunnel statistics
1502 * @dstats: Dummy statistics
1503 * @vstats: Virtual ethernet statistics
1508 * @dev: Class/net/name entry
1509 * @sysfs_groups: Space for optional device, statistics and wireless
1512 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1513 * @rtnl_link_ops: Rtnl_link_ops
1515 * @gso_max_size: Maximum size of generic segmentation offload
1516 * @gso_max_segs: Maximum number of segments that can be passed to the
1518 * @gso_min_segs: Minimum number of segments that can be passed to the
1521 * @dcbnl_ops: Data Center Bridging netlink ops
1522 * @num_tc: Number of traffic classes in the net device
1523 * @tc_to_txq: XXX: need comments on this one
1524 * @prio_tc_map XXX: need comments on this one
1526 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1528 * @priomap: XXX: need comments on this one
1529 * @phydev: Physical device may attach itself
1530 * for hardware timestamping
1532 * @qdisc_tx_busylock: XXX: need comments on this one
1534 * @proto_down: protocol port state information can be sent to the
1535 * switch driver and used to set the phys state of the
1538 * FIXME: cleanup struct net_device such that network protocol info
1543 char name
[IFNAMSIZ
];
1544 struct hlist_node name_hlist
;
1547 * I/O specific fields
1548 * FIXME: Merge these and struct ifmap into one
1550 unsigned long mem_end
;
1551 unsigned long mem_start
;
1552 unsigned long base_addr
;
1555 atomic_t carrier_changes
;
1558 * Some hardware also needs these fields (state,dev_list,
1559 * napi_list,unreg_list,close_list) but they are not
1560 * part of the usual set specified in Space.c.
1563 unsigned long state
;
1565 struct list_head dev_list
;
1566 struct list_head napi_list
;
1567 struct list_head unreg_list
;
1568 struct list_head close_list
;
1569 struct list_head ptype_all
;
1570 struct list_head ptype_specific
;
1573 struct list_head upper
;
1574 struct list_head lower
;
1578 struct list_head upper
;
1579 struct list_head lower
;
1582 netdev_features_t features
;
1583 netdev_features_t hw_features
;
1584 netdev_features_t wanted_features
;
1585 netdev_features_t vlan_features
;
1586 netdev_features_t hw_enc_features
;
1587 netdev_features_t mpls_features
;
1592 struct net_device_stats stats
;
1594 atomic_long_t rx_dropped
;
1595 atomic_long_t tx_dropped
;
1597 #ifdef CONFIG_WIRELESS_EXT
1598 const struct iw_handler_def
* wireless_handlers
;
1599 struct iw_public_data
* wireless_data
;
1601 const struct net_device_ops
*netdev_ops
;
1602 const struct ethtool_ops
*ethtool_ops
;
1603 #ifdef CONFIG_NET_SWITCHDEV
1604 const struct switchdev_ops
*switchdev_ops
;
1606 #ifdef CONFIG_NET_L3_MASTER_DEV
1607 const struct l3mdev_ops
*l3mdev_ops
;
1610 const struct header_ops
*header_ops
;
1613 unsigned int priv_flags
;
1615 unsigned short gflags
;
1616 unsigned short padded
;
1618 unsigned char operstate
;
1619 unsigned char link_mode
;
1621 unsigned char if_port
;
1625 unsigned short type
;
1626 unsigned short hard_header_len
;
1628 unsigned short needed_headroom
;
1629 unsigned short needed_tailroom
;
1631 /* Interface address info. */
1632 unsigned char perm_addr
[MAX_ADDR_LEN
];
1633 unsigned char addr_assign_type
;
1634 unsigned char addr_len
;
1635 unsigned short neigh_priv_len
;
1636 unsigned short dev_id
;
1637 unsigned short dev_port
;
1638 spinlock_t addr_list_lock
;
1639 unsigned char name_assign_type
;
1641 struct netdev_hw_addr_list uc
;
1642 struct netdev_hw_addr_list mc
;
1643 struct netdev_hw_addr_list dev_addrs
;
1646 struct kset
*queues_kset
;
1648 unsigned int promiscuity
;
1649 unsigned int allmulti
;
1652 /* Protocol specific pointers */
1654 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1655 struct vlan_info __rcu
*vlan_info
;
1657 #if IS_ENABLED(CONFIG_NET_DSA)
1658 struct dsa_switch_tree
*dsa_ptr
;
1660 #if IS_ENABLED(CONFIG_TIPC)
1661 struct tipc_bearer __rcu
*tipc_ptr
;
1664 struct in_device __rcu
*ip_ptr
;
1665 struct dn_dev __rcu
*dn_ptr
;
1666 struct inet6_dev __rcu
*ip6_ptr
;
1668 struct wireless_dev
*ieee80211_ptr
;
1669 struct wpan_dev
*ieee802154_ptr
;
1670 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1671 struct mpls_dev __rcu
*mpls_ptr
;
1675 * Cache lines mostly used on receive path (including eth_type_trans())
1677 unsigned long last_rx
;
1679 /* Interface address info used in eth_type_trans() */
1680 unsigned char *dev_addr
;
1684 struct netdev_rx_queue
*_rx
;
1686 unsigned int num_rx_queues
;
1687 unsigned int real_num_rx_queues
;
1691 unsigned long gro_flush_timeout
;
1692 rx_handler_func_t __rcu
*rx_handler
;
1693 void __rcu
*rx_handler_data
;
1695 #ifdef CONFIG_NET_CLS_ACT
1696 struct tcf_proto __rcu
*ingress_cl_list
;
1698 struct netdev_queue __rcu
*ingress_queue
;
1699 #ifdef CONFIG_NETFILTER_INGRESS
1700 struct list_head nf_hooks_ingress
;
1703 unsigned char broadcast
[MAX_ADDR_LEN
];
1704 #ifdef CONFIG_RFS_ACCEL
1705 struct cpu_rmap
*rx_cpu_rmap
;
1707 struct hlist_node index_hlist
;
1710 * Cache lines mostly used on transmit path
1712 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1713 unsigned int num_tx_queues
;
1714 unsigned int real_num_tx_queues
;
1715 struct Qdisc
*qdisc
;
1716 unsigned long tx_queue_len
;
1717 spinlock_t tx_global_lock
;
1721 struct xps_dev_maps __rcu
*xps_maps
;
1724 #ifdef CONFIG_NET_SWITCHDEV
1725 u32 offload_fwd_mark
;
1728 /* These may be needed for future network-power-down code. */
1731 * trans_start here is expensive for high speed devices on SMP,
1732 * please use netdev_queue->trans_start instead.
1734 unsigned long trans_start
;
1736 struct timer_list watchdog_timer
;
1738 int __percpu
*pcpu_refcnt
;
1739 struct list_head todo_list
;
1741 struct list_head link_watch_list
;
1743 enum { NETREG_UNINITIALIZED
=0,
1744 NETREG_REGISTERED
, /* completed register_netdevice */
1745 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1746 NETREG_UNREGISTERED
, /* completed unregister todo */
1747 NETREG_RELEASED
, /* called free_netdev */
1748 NETREG_DUMMY
, /* dummy device for NAPI poll */
1754 RTNL_LINK_INITIALIZED
,
1755 RTNL_LINK_INITIALIZING
,
1756 } rtnl_link_state
:16;
1758 void (*destructor
)(struct net_device
*dev
);
1760 #ifdef CONFIG_NETPOLL
1761 struct netpoll_info __rcu
*npinfo
;
1764 possible_net_t nd_net
;
1766 /* mid-layer private */
1769 struct pcpu_lstats __percpu
*lstats
;
1770 struct pcpu_sw_netstats __percpu
*tstats
;
1771 struct pcpu_dstats __percpu
*dstats
;
1772 struct pcpu_vstats __percpu
*vstats
;
1775 struct garp_port __rcu
*garp_port
;
1776 struct mrp_port __rcu
*mrp_port
;
1779 const struct attribute_group
*sysfs_groups
[4];
1780 const struct attribute_group
*sysfs_rx_queue_group
;
1782 const struct rtnl_link_ops
*rtnl_link_ops
;
1784 /* for setting kernel sock attribute on TCP connection setup */
1785 #define GSO_MAX_SIZE 65536
1786 unsigned int gso_max_size
;
1787 #define GSO_MAX_SEGS 65535
1791 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1794 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1795 u8 prio_tc_map
[TC_BITMASK
+ 1];
1797 #if IS_ENABLED(CONFIG_FCOE)
1798 unsigned int fcoe_ddp_xid
;
1800 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1801 struct netprio_map __rcu
*priomap
;
1803 struct phy_device
*phydev
;
1804 struct lock_class_key
*qdisc_tx_busylock
;
1807 #define to_net_dev(d) container_of(d, struct net_device, dev)
1809 #define NETDEV_ALIGN 32
1812 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1814 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1818 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1820 if (tc
>= dev
->num_tc
)
1823 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1828 void netdev_reset_tc(struct net_device
*dev
)
1831 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1832 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1836 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1838 if (tc
>= dev
->num_tc
)
1841 dev
->tc_to_txq
[tc
].count
= count
;
1842 dev
->tc_to_txq
[tc
].offset
= offset
;
1847 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1849 if (num_tc
> TC_MAX_QUEUE
)
1852 dev
->num_tc
= num_tc
;
1857 int netdev_get_num_tc(struct net_device
*dev
)
1863 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1866 return &dev
->_tx
[index
];
1869 static inline struct netdev_queue
*skb_get_tx_queue(const struct net_device
*dev
,
1870 const struct sk_buff
*skb
)
1872 return netdev_get_tx_queue(dev
, skb_get_queue_mapping(skb
));
1875 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1876 void (*f
)(struct net_device
*,
1877 struct netdev_queue
*,
1883 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1884 f(dev
, &dev
->_tx
[i
], arg
);
1887 struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1888 struct sk_buff
*skb
,
1892 * Net namespace inlines
1895 struct net
*dev_net(const struct net_device
*dev
)
1897 return read_pnet(&dev
->nd_net
);
1901 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1903 write_pnet(&dev
->nd_net
, net
);
1906 static inline bool netdev_uses_dsa(struct net_device
*dev
)
1908 #if IS_ENABLED(CONFIG_NET_DSA)
1909 if (dev
->dsa_ptr
!= NULL
)
1910 return dsa_uses_tagged_protocol(dev
->dsa_ptr
);
1916 * netdev_priv - access network device private data
1917 * @dev: network device
1919 * Get network device private data
1921 static inline void *netdev_priv(const struct net_device
*dev
)
1923 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1926 /* Set the sysfs physical device reference for the network logical device
1927 * if set prior to registration will cause a symlink during initialization.
1929 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1931 /* Set the sysfs device type for the network logical device to allow
1932 * fine-grained identification of different network device types. For
1933 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1935 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1937 /* Default NAPI poll() weight
1938 * Device drivers are strongly advised to not use bigger value
1940 #define NAPI_POLL_WEIGHT 64
1943 * netif_napi_add - initialize a napi context
1944 * @dev: network device
1945 * @napi: napi context
1946 * @poll: polling function
1947 * @weight: default weight
1949 * netif_napi_add() must be used to initialize a napi context prior to calling
1950 * *any* of the other napi related functions.
1952 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1953 int (*poll
)(struct napi_struct
*, int), int weight
);
1956 * netif_tx_napi_add - initialize a napi context
1957 * @dev: network device
1958 * @napi: napi context
1959 * @poll: polling function
1960 * @weight: default weight
1962 * This variant of netif_napi_add() should be used from drivers using NAPI
1963 * to exclusively poll a TX queue.
1964 * This will avoid we add it into napi_hash[], thus polluting this hash table.
1966 static inline void netif_tx_napi_add(struct net_device
*dev
,
1967 struct napi_struct
*napi
,
1968 int (*poll
)(struct napi_struct
*, int),
1971 set_bit(NAPI_STATE_NO_BUSY_POLL
, &napi
->state
);
1972 netif_napi_add(dev
, napi
, poll
, weight
);
1976 * netif_napi_del - remove a napi context
1977 * @napi: napi context
1979 * netif_napi_del() removes a napi context from the network device napi list
1981 void netif_napi_del(struct napi_struct
*napi
);
1983 struct napi_gro_cb
{
1984 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1987 /* Length of frag0. */
1988 unsigned int frag0_len
;
1990 /* This indicates where we are processing relative to skb->data. */
1993 /* This is non-zero if the packet cannot be merged with the new skb. */
1996 /* Save the IP ID here and check when we get to the transport layer */
1999 /* Number of segments aggregated. */
2002 /* Start offset for remote checksum offload */
2003 u16 gro_remcsum_start
;
2005 /* jiffies when first packet was created/queued */
2008 /* Used in ipv6_gro_receive() and foo-over-udp */
2011 /* This is non-zero if the packet may be of the same flow. */
2014 /* Used in udp_gro_receive */
2017 /* GRO checksum is valid */
2020 /* Number of checksums via CHECKSUM_UNNECESSARY */
2025 #define NAPI_GRO_FREE 1
2026 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2028 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2033 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2036 /* used in skb_gro_receive() slow path */
2037 struct sk_buff
*last
;
2040 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2042 struct packet_type
{
2043 __be16 type
; /* This is really htons(ether_type). */
2044 struct net_device
*dev
; /* NULL is wildcarded here */
2045 int (*func
) (struct sk_buff
*,
2046 struct net_device
*,
2047 struct packet_type
*,
2048 struct net_device
*);
2049 bool (*id_match
)(struct packet_type
*ptype
,
2051 void *af_packet_priv
;
2052 struct list_head list
;
2055 struct offload_callbacks
{
2056 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
2057 netdev_features_t features
);
2058 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
2059 struct sk_buff
*skb
);
2060 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
2063 struct packet_offload
{
2064 __be16 type
; /* This is really htons(ether_type). */
2066 struct offload_callbacks callbacks
;
2067 struct list_head list
;
2072 struct udp_offload_callbacks
{
2073 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
2074 struct sk_buff
*skb
,
2075 struct udp_offload
*uoff
);
2076 int (*gro_complete
)(struct sk_buff
*skb
,
2078 struct udp_offload
*uoff
);
2081 struct udp_offload
{
2084 struct udp_offload_callbacks callbacks
;
2087 /* often modified stats are per cpu, other are shared (netdev->stats) */
2088 struct pcpu_sw_netstats
{
2093 struct u64_stats_sync syncp
;
2096 #define __netdev_alloc_pcpu_stats(type, gfp) \
2098 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2101 for_each_possible_cpu(__cpu) { \
2102 typeof(type) *stat; \
2103 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2104 u64_stats_init(&stat->syncp); \
2110 #define netdev_alloc_pcpu_stats(type) \
2111 __netdev_alloc_pcpu_stats(type, GFP_KERNEL);
2113 enum netdev_lag_tx_type
{
2114 NETDEV_LAG_TX_TYPE_UNKNOWN
,
2115 NETDEV_LAG_TX_TYPE_RANDOM
,
2116 NETDEV_LAG_TX_TYPE_BROADCAST
,
2117 NETDEV_LAG_TX_TYPE_ROUNDROBIN
,
2118 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
,
2119 NETDEV_LAG_TX_TYPE_HASH
,
2122 struct netdev_lag_upper_info
{
2123 enum netdev_lag_tx_type tx_type
;
2126 struct netdev_lag_lower_state_info
{
2131 #include <linux/notifier.h>
2133 /* netdevice notifier chain. Please remember to update the rtnetlink
2134 * notification exclusion list in rtnetlink_event() when adding new
2137 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2138 #define NETDEV_DOWN 0x0002
2139 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2140 detected a hardware crash and restarted
2141 - we can use this eg to kick tcp sessions
2143 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2144 #define NETDEV_REGISTER 0x0005
2145 #define NETDEV_UNREGISTER 0x0006
2146 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2147 #define NETDEV_CHANGEADDR 0x0008
2148 #define NETDEV_GOING_DOWN 0x0009
2149 #define NETDEV_CHANGENAME 0x000A
2150 #define NETDEV_FEAT_CHANGE 0x000B
2151 #define NETDEV_BONDING_FAILOVER 0x000C
2152 #define NETDEV_PRE_UP 0x000D
2153 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2154 #define NETDEV_POST_TYPE_CHANGE 0x000F
2155 #define NETDEV_POST_INIT 0x0010
2156 #define NETDEV_UNREGISTER_FINAL 0x0011
2157 #define NETDEV_RELEASE 0x0012
2158 #define NETDEV_NOTIFY_PEERS 0x0013
2159 #define NETDEV_JOIN 0x0014
2160 #define NETDEV_CHANGEUPPER 0x0015
2161 #define NETDEV_RESEND_IGMP 0x0016
2162 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2163 #define NETDEV_CHANGEINFODATA 0x0018
2164 #define NETDEV_BONDING_INFO 0x0019
2165 #define NETDEV_PRECHANGEUPPER 0x001A
2166 #define NETDEV_CHANGELOWERSTATE 0x001B
2168 int register_netdevice_notifier(struct notifier_block
*nb
);
2169 int unregister_netdevice_notifier(struct notifier_block
*nb
);
2171 struct netdev_notifier_info
{
2172 struct net_device
*dev
;
2175 struct netdev_notifier_change_info
{
2176 struct netdev_notifier_info info
; /* must be first */
2177 unsigned int flags_changed
;
2180 struct netdev_notifier_changeupper_info
{
2181 struct netdev_notifier_info info
; /* must be first */
2182 struct net_device
*upper_dev
; /* new upper dev */
2183 bool master
; /* is upper dev master */
2184 bool linking
; /* is the nofication for link or unlink */
2185 void *upper_info
; /* upper dev info */
2188 struct netdev_notifier_changelowerstate_info
{
2189 struct netdev_notifier_info info
; /* must be first */
2190 void *lower_state_info
; /* is lower dev state */
2193 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
2194 struct net_device
*dev
)
2199 static inline struct net_device
*
2200 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
2205 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
2208 extern rwlock_t dev_base_lock
; /* Device list lock */
2210 #define for_each_netdev(net, d) \
2211 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2212 #define for_each_netdev_reverse(net, d) \
2213 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2214 #define for_each_netdev_rcu(net, d) \
2215 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2216 #define for_each_netdev_safe(net, d, n) \
2217 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2218 #define for_each_netdev_continue(net, d) \
2219 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2220 #define for_each_netdev_continue_rcu(net, d) \
2221 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2222 #define for_each_netdev_in_bond_rcu(bond, slave) \
2223 for_each_netdev_rcu(&init_net, slave) \
2224 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2225 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2227 static inline struct net_device
*next_net_device(struct net_device
*dev
)
2229 struct list_head
*lh
;
2233 lh
= dev
->dev_list
.next
;
2234 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2237 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
2239 struct list_head
*lh
;
2243 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
2244 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2247 static inline struct net_device
*first_net_device(struct net
*net
)
2249 return list_empty(&net
->dev_base_head
) ? NULL
:
2250 net_device_entry(net
->dev_base_head
.next
);
2253 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
2255 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
2257 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2260 int netdev_boot_setup_check(struct net_device
*dev
);
2261 unsigned long netdev_boot_base(const char *prefix
, int unit
);
2262 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
2263 const char *hwaddr
);
2264 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2265 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2266 void dev_add_pack(struct packet_type
*pt
);
2267 void dev_remove_pack(struct packet_type
*pt
);
2268 void __dev_remove_pack(struct packet_type
*pt
);
2269 void dev_add_offload(struct packet_offload
*po
);
2270 void dev_remove_offload(struct packet_offload
*po
);
2272 int dev_get_iflink(const struct net_device
*dev
);
2273 int dev_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
);
2274 struct net_device
*__dev_get_by_flags(struct net
*net
, unsigned short flags
,
2275 unsigned short mask
);
2276 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
2277 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
2278 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
2279 int dev_alloc_name(struct net_device
*dev
, const char *name
);
2280 int dev_open(struct net_device
*dev
);
2281 int dev_close(struct net_device
*dev
);
2282 int dev_close_many(struct list_head
*head
, bool unlink
);
2283 void dev_disable_lro(struct net_device
*dev
);
2284 int dev_loopback_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*newskb
);
2285 int dev_queue_xmit(struct sk_buff
*skb
);
2286 int dev_queue_xmit_accel(struct sk_buff
*skb
, void *accel_priv
);
2287 int register_netdevice(struct net_device
*dev
);
2288 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
2289 void unregister_netdevice_many(struct list_head
*head
);
2290 static inline void unregister_netdevice(struct net_device
*dev
)
2292 unregister_netdevice_queue(dev
, NULL
);
2295 int netdev_refcnt_read(const struct net_device
*dev
);
2296 void free_netdev(struct net_device
*dev
);
2297 void netdev_freemem(struct net_device
*dev
);
2298 void synchronize_net(void);
2299 int init_dummy_netdev(struct net_device
*dev
);
2301 DECLARE_PER_CPU(int, xmit_recursion
);
2302 static inline int dev_recursion_level(void)
2304 return this_cpu_read(xmit_recursion
);
2307 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
2308 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
2309 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
2310 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
2311 int dev_restart(struct net_device
*dev
);
2312 int skb_gro_receive(struct sk_buff
**head
, struct sk_buff
*skb
);
2314 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
2316 return NAPI_GRO_CB(skb
)->data_offset
;
2319 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
2321 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
2324 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
2326 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2329 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2330 unsigned int offset
)
2332 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2335 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2337 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2340 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2341 unsigned int offset
)
2343 if (!pskb_may_pull(skb
, hlen
))
2346 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2347 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2348 return skb
->data
+ offset
;
2351 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2353 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2354 skb_network_offset(skb
);
2357 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2358 const void *start
, unsigned int len
)
2360 if (NAPI_GRO_CB(skb
)->csum_valid
)
2361 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2362 csum_partial(start
, len
, 0));
2365 /* GRO checksum functions. These are logical equivalents of the normal
2366 * checksum functions (in skbuff.h) except that they operate on the GRO
2367 * offsets and fields in sk_buff.
2370 __sum16
__skb_gro_checksum_complete(struct sk_buff
*skb
);
2372 static inline bool skb_at_gro_remcsum_start(struct sk_buff
*skb
)
2374 return (NAPI_GRO_CB(skb
)->gro_remcsum_start
== skb_gro_offset(skb
));
2377 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff
*skb
,
2381 return ((skb
->ip_summed
!= CHECKSUM_PARTIAL
||
2382 skb_checksum_start_offset(skb
) <
2383 skb_gro_offset(skb
)) &&
2384 !skb_at_gro_remcsum_start(skb
) &&
2385 NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2386 (!zero_okay
|| check
));
2389 static inline __sum16
__skb_gro_checksum_validate_complete(struct sk_buff
*skb
,
2392 if (NAPI_GRO_CB(skb
)->csum_valid
&&
2393 !csum_fold(csum_add(psum
, NAPI_GRO_CB(skb
)->csum
)))
2396 NAPI_GRO_CB(skb
)->csum
= psum
;
2398 return __skb_gro_checksum_complete(skb
);
2401 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff
*skb
)
2403 if (NAPI_GRO_CB(skb
)->csum_cnt
> 0) {
2404 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2405 NAPI_GRO_CB(skb
)->csum_cnt
--;
2407 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2408 * verified a new top level checksum or an encapsulated one
2409 * during GRO. This saves work if we fallback to normal path.
2411 __skb_incr_checksum_unnecessary(skb
);
2415 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2418 __sum16 __ret = 0; \
2419 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2420 __ret = __skb_gro_checksum_validate_complete(skb, \
2421 compute_pseudo(skb, proto)); \
2423 __skb_mark_checksum_bad(skb); \
2425 skb_gro_incr_csum_unnecessary(skb); \
2429 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2430 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2432 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2434 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2436 #define skb_gro_checksum_simple_validate(skb) \
2437 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2439 static inline bool __skb_gro_checksum_convert_check(struct sk_buff
*skb
)
2441 return (NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2442 !NAPI_GRO_CB(skb
)->csum_valid
);
2445 static inline void __skb_gro_checksum_convert(struct sk_buff
*skb
,
2446 __sum16 check
, __wsum pseudo
)
2448 NAPI_GRO_CB(skb
)->csum
= ~pseudo
;
2449 NAPI_GRO_CB(skb
)->csum_valid
= 1;
2452 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2454 if (__skb_gro_checksum_convert_check(skb)) \
2455 __skb_gro_checksum_convert(skb, check, \
2456 compute_pseudo(skb, proto)); \
2459 struct gro_remcsum
{
2464 static inline void skb_gro_remcsum_init(struct gro_remcsum
*grc
)
2470 static inline void *skb_gro_remcsum_process(struct sk_buff
*skb
, void *ptr
,
2471 unsigned int off
, size_t hdrlen
,
2472 int start
, int offset
,
2473 struct gro_remcsum
*grc
,
2477 size_t plen
= hdrlen
+ max_t(size_t, offset
+ sizeof(u16
), start
);
2479 BUG_ON(!NAPI_GRO_CB(skb
)->csum_valid
);
2482 NAPI_GRO_CB(skb
)->gro_remcsum_start
= off
+ hdrlen
+ start
;
2486 ptr
= skb_gro_header_fast(skb
, off
);
2487 if (skb_gro_header_hard(skb
, off
+ plen
)) {
2488 ptr
= skb_gro_header_slow(skb
, off
+ plen
, off
);
2493 delta
= remcsum_adjust(ptr
+ hdrlen
, NAPI_GRO_CB(skb
)->csum
,
2496 /* Adjust skb->csum since we changed the packet */
2497 NAPI_GRO_CB(skb
)->csum
= csum_add(NAPI_GRO_CB(skb
)->csum
, delta
);
2499 grc
->offset
= off
+ hdrlen
+ offset
;
2505 static inline void skb_gro_remcsum_cleanup(struct sk_buff
*skb
,
2506 struct gro_remcsum
*grc
)
2509 size_t plen
= grc
->offset
+ sizeof(u16
);
2514 ptr
= skb_gro_header_fast(skb
, grc
->offset
);
2515 if (skb_gro_header_hard(skb
, grc
->offset
+ sizeof(u16
))) {
2516 ptr
= skb_gro_header_slow(skb
, plen
, grc
->offset
);
2521 remcsum_unadjust((__sum16
*)ptr
, grc
->delta
);
2524 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2525 unsigned short type
,
2526 const void *daddr
, const void *saddr
,
2529 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2532 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2535 static inline int dev_parse_header(const struct sk_buff
*skb
,
2536 unsigned char *haddr
)
2538 const struct net_device
*dev
= skb
->dev
;
2540 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2542 return dev
->header_ops
->parse(skb
, haddr
);
2545 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
2546 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2547 static inline int unregister_gifconf(unsigned int family
)
2549 return register_gifconf(family
, NULL
);
2552 #ifdef CONFIG_NET_FLOW_LIMIT
2553 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2554 struct sd_flow_limit
{
2556 unsigned int num_buckets
;
2557 unsigned int history_head
;
2558 u16 history
[FLOW_LIMIT_HISTORY
];
2562 extern int netdev_flow_limit_table_len
;
2563 #endif /* CONFIG_NET_FLOW_LIMIT */
2566 * Incoming packets are placed on per-cpu queues
2568 struct softnet_data
{
2569 struct list_head poll_list
;
2570 struct sk_buff_head process_queue
;
2573 unsigned int processed
;
2574 unsigned int time_squeeze
;
2575 unsigned int cpu_collision
;
2576 unsigned int received_rps
;
2578 struct softnet_data
*rps_ipi_list
;
2580 #ifdef CONFIG_NET_FLOW_LIMIT
2581 struct sd_flow_limit __rcu
*flow_limit
;
2583 struct Qdisc
*output_queue
;
2584 struct Qdisc
**output_queue_tailp
;
2585 struct sk_buff
*completion_queue
;
2588 /* Elements below can be accessed between CPUs for RPS */
2589 struct call_single_data csd ____cacheline_aligned_in_smp
;
2590 struct softnet_data
*rps_ipi_next
;
2592 unsigned int input_queue_head
;
2593 unsigned int input_queue_tail
;
2595 unsigned int dropped
;
2596 struct sk_buff_head input_pkt_queue
;
2597 struct napi_struct backlog
;
2601 static inline void input_queue_head_incr(struct softnet_data
*sd
)
2604 sd
->input_queue_head
++;
2608 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
2609 unsigned int *qtail
)
2612 *qtail
= ++sd
->input_queue_tail
;
2616 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
2618 void __netif_schedule(struct Qdisc
*q
);
2619 void netif_schedule_queue(struct netdev_queue
*txq
);
2621 static inline void netif_tx_schedule_all(struct net_device
*dev
)
2625 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2626 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
2629 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
2631 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2635 * netif_start_queue - allow transmit
2636 * @dev: network device
2638 * Allow upper layers to call the device hard_start_xmit routine.
2640 static inline void netif_start_queue(struct net_device
*dev
)
2642 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
2645 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
2649 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2650 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2651 netif_tx_start_queue(txq
);
2655 void netif_tx_wake_queue(struct netdev_queue
*dev_queue
);
2658 * netif_wake_queue - restart transmit
2659 * @dev: network device
2661 * Allow upper layers to call the device hard_start_xmit routine.
2662 * Used for flow control when transmit resources are available.
2664 static inline void netif_wake_queue(struct net_device
*dev
)
2666 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
2669 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
2673 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2674 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2675 netif_tx_wake_queue(txq
);
2679 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
2681 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2685 * netif_stop_queue - stop transmitted packets
2686 * @dev: network device
2688 * Stop upper layers calling the device hard_start_xmit routine.
2689 * Used for flow control when transmit resources are unavailable.
2691 static inline void netif_stop_queue(struct net_device
*dev
)
2693 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2696 void netif_tx_stop_all_queues(struct net_device
*dev
);
2698 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2700 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2704 * netif_queue_stopped - test if transmit queue is flowblocked
2705 * @dev: network device
2707 * Test if transmit queue on device is currently unable to send.
2709 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2711 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2714 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2716 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2720 netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2722 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2726 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue
*dev_queue
)
2728 return dev_queue
->state
& QUEUE_STATE_DRV_XOFF_OR_FROZEN
;
2732 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2733 * @dev_queue: pointer to transmit queue
2735 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2736 * to give appropriate hint to the cpu.
2738 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue
*dev_queue
)
2741 prefetchw(&dev_queue
->dql
.num_queued
);
2746 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2747 * @dev_queue: pointer to transmit queue
2749 * BQL enabled drivers might use this helper in their TX completion path,
2750 * to give appropriate hint to the cpu.
2752 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue
*dev_queue
)
2755 prefetchw(&dev_queue
->dql
.limit
);
2759 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2763 dql_queued(&dev_queue
->dql
, bytes
);
2765 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2768 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2771 * The XOFF flag must be set before checking the dql_avail below,
2772 * because in netdev_tx_completed_queue we update the dql_completed
2773 * before checking the XOFF flag.
2777 /* check again in case another CPU has just made room avail */
2778 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2779 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2784 * netdev_sent_queue - report the number of bytes queued to hardware
2785 * @dev: network device
2786 * @bytes: number of bytes queued to the hardware device queue
2788 * Report the number of bytes queued for sending/completion to the network
2789 * device hardware queue. @bytes should be a good approximation and should
2790 * exactly match netdev_completed_queue() @bytes
2792 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2794 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2797 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2798 unsigned int pkts
, unsigned int bytes
)
2801 if (unlikely(!bytes
))
2804 dql_completed(&dev_queue
->dql
, bytes
);
2807 * Without the memory barrier there is a small possiblity that
2808 * netdev_tx_sent_queue will miss the update and cause the queue to
2809 * be stopped forever
2813 if (dql_avail(&dev_queue
->dql
) < 0)
2816 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2817 netif_schedule_queue(dev_queue
);
2822 * netdev_completed_queue - report bytes and packets completed by device
2823 * @dev: network device
2824 * @pkts: actual number of packets sent over the medium
2825 * @bytes: actual number of bytes sent over the medium
2827 * Report the number of bytes and packets transmitted by the network device
2828 * hardware queue over the physical medium, @bytes must exactly match the
2829 * @bytes amount passed to netdev_sent_queue()
2831 static inline void netdev_completed_queue(struct net_device
*dev
,
2832 unsigned int pkts
, unsigned int bytes
)
2834 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2837 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2840 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2846 * netdev_reset_queue - reset the packets and bytes count of a network device
2847 * @dev_queue: network device
2849 * Reset the bytes and packet count of a network device and clear the
2850 * software flow control OFF bit for this network device
2852 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2854 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2858 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2859 * @dev: network device
2860 * @queue_index: given tx queue index
2862 * Returns 0 if given tx queue index >= number of device tx queues,
2863 * otherwise returns the originally passed tx queue index.
2865 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
2867 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
2868 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2869 dev
->name
, queue_index
,
2870 dev
->real_num_tx_queues
);
2878 * netif_running - test if up
2879 * @dev: network device
2881 * Test if the device has been brought up.
2883 static inline bool netif_running(const struct net_device
*dev
)
2885 return test_bit(__LINK_STATE_START
, &dev
->state
);
2889 * Routines to manage the subqueues on a device. We only need start
2890 * stop, and a check if it's stopped. All other device management is
2891 * done at the overall netdevice level.
2892 * Also test the device if we're multiqueue.
2896 * netif_start_subqueue - allow sending packets on subqueue
2897 * @dev: network device
2898 * @queue_index: sub queue index
2900 * Start individual transmit queue of a device with multiple transmit queues.
2902 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2904 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2906 netif_tx_start_queue(txq
);
2910 * netif_stop_subqueue - stop sending packets on subqueue
2911 * @dev: network device
2912 * @queue_index: sub queue index
2914 * Stop individual transmit queue of a device with multiple transmit queues.
2916 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2918 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2919 netif_tx_stop_queue(txq
);
2923 * netif_subqueue_stopped - test status of subqueue
2924 * @dev: network device
2925 * @queue_index: sub queue index
2927 * Check individual transmit queue of a device with multiple transmit queues.
2929 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2932 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2934 return netif_tx_queue_stopped(txq
);
2937 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2938 struct sk_buff
*skb
)
2940 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2943 void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
);
2946 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
2949 static inline int netif_set_xps_queue(struct net_device
*dev
,
2950 const struct cpumask
*mask
,
2957 u16
__skb_tx_hash(const struct net_device
*dev
, struct sk_buff
*skb
,
2958 unsigned int num_tx_queues
);
2961 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2962 * as a distribution range limit for the returned value.
2964 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2965 struct sk_buff
*skb
)
2967 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2971 * netif_is_multiqueue - test if device has multiple transmit queues
2972 * @dev: network device
2974 * Check if device has multiple transmit queues
2976 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2978 return dev
->num_tx_queues
> 1;
2981 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
2984 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
2986 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2994 static inline unsigned int get_netdev_rx_queue_index(
2995 struct netdev_rx_queue
*queue
)
2997 struct net_device
*dev
= queue
->dev
;
2998 int index
= queue
- dev
->_rx
;
3000 BUG_ON(index
>= dev
->num_rx_queues
);
3005 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3006 int netif_get_num_default_rss_queues(void);
3008 enum skb_free_reason
{
3009 SKB_REASON_CONSUMED
,
3013 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
3014 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
3017 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3018 * interrupt context or with hardware interrupts being disabled.
3019 * (in_irq() || irqs_disabled())
3021 * We provide four helpers that can be used in following contexts :
3023 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3024 * replacing kfree_skb(skb)
3026 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3027 * Typically used in place of consume_skb(skb) in TX completion path
3029 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3030 * replacing kfree_skb(skb)
3032 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3033 * and consumed a packet. Used in place of consume_skb(skb)
3035 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
3037 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
3040 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
3042 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
3045 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
3047 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
3050 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
3052 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
3055 int netif_rx(struct sk_buff
*skb
);
3056 int netif_rx_ni(struct sk_buff
*skb
);
3057 int netif_receive_skb(struct sk_buff
*skb
);
3058 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
3059 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
3060 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
3061 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
3062 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
3063 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
3065 static inline void napi_free_frags(struct napi_struct
*napi
)
3067 kfree_skb(napi
->skb
);
3071 int netdev_rx_handler_register(struct net_device
*dev
,
3072 rx_handler_func_t
*rx_handler
,
3073 void *rx_handler_data
);
3074 void netdev_rx_handler_unregister(struct net_device
*dev
);
3076 bool dev_valid_name(const char *name
);
3077 int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
3078 int dev_ethtool(struct net
*net
, struct ifreq
*);
3079 unsigned int dev_get_flags(const struct net_device
*);
3080 int __dev_change_flags(struct net_device
*, unsigned int flags
);
3081 int dev_change_flags(struct net_device
*, unsigned int);
3082 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
3083 unsigned int gchanges
);
3084 int dev_change_name(struct net_device
*, const char *);
3085 int dev_set_alias(struct net_device
*, const char *, size_t);
3086 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
3087 int dev_set_mtu(struct net_device
*, int);
3088 void dev_set_group(struct net_device
*, int);
3089 int dev_set_mac_address(struct net_device
*, struct sockaddr
*);
3090 int dev_change_carrier(struct net_device
*, bool new_carrier
);
3091 int dev_get_phys_port_id(struct net_device
*dev
,
3092 struct netdev_phys_item_id
*ppid
);
3093 int dev_get_phys_port_name(struct net_device
*dev
,
3094 char *name
, size_t len
);
3095 int dev_change_proto_down(struct net_device
*dev
, bool proto_down
);
3096 struct sk_buff
*validate_xmit_skb_list(struct sk_buff
*skb
, struct net_device
*dev
);
3097 struct sk_buff
*dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
3098 struct netdev_queue
*txq
, int *ret
);
3099 int __dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3100 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3101 bool is_skb_forwardable(struct net_device
*dev
, struct sk_buff
*skb
);
3103 extern int netdev_budget
;
3105 /* Called by rtnetlink.c:rtnl_unlock() */
3106 void netdev_run_todo(void);
3109 * dev_put - release reference to device
3110 * @dev: network device
3112 * Release reference to device to allow it to be freed.
3114 static inline void dev_put(struct net_device
*dev
)
3116 this_cpu_dec(*dev
->pcpu_refcnt
);
3120 * dev_hold - get reference to device
3121 * @dev: network device
3123 * Hold reference to device to keep it from being freed.
3125 static inline void dev_hold(struct net_device
*dev
)
3127 this_cpu_inc(*dev
->pcpu_refcnt
);
3130 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3131 * and _off may be called from IRQ context, but it is caller
3132 * who is responsible for serialization of these calls.
3134 * The name carrier is inappropriate, these functions should really be
3135 * called netif_lowerlayer_*() because they represent the state of any
3136 * kind of lower layer not just hardware media.
3139 void linkwatch_init_dev(struct net_device
*dev
);
3140 void linkwatch_fire_event(struct net_device
*dev
);
3141 void linkwatch_forget_dev(struct net_device
*dev
);
3144 * netif_carrier_ok - test if carrier present
3145 * @dev: network device
3147 * Check if carrier is present on device
3149 static inline bool netif_carrier_ok(const struct net_device
*dev
)
3151 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
3154 unsigned long dev_trans_start(struct net_device
*dev
);
3156 void __netdev_watchdog_up(struct net_device
*dev
);
3158 void netif_carrier_on(struct net_device
*dev
);
3160 void netif_carrier_off(struct net_device
*dev
);
3163 * netif_dormant_on - mark device as dormant.
3164 * @dev: network device
3166 * Mark device as dormant (as per RFC2863).
3168 * The dormant state indicates that the relevant interface is not
3169 * actually in a condition to pass packets (i.e., it is not 'up') but is
3170 * in a "pending" state, waiting for some external event. For "on-
3171 * demand" interfaces, this new state identifies the situation where the
3172 * interface is waiting for events to place it in the up state.
3175 static inline void netif_dormant_on(struct net_device
*dev
)
3177 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3178 linkwatch_fire_event(dev
);
3182 * netif_dormant_off - set device as not dormant.
3183 * @dev: network device
3185 * Device is not in dormant state.
3187 static inline void netif_dormant_off(struct net_device
*dev
)
3189 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3190 linkwatch_fire_event(dev
);
3194 * netif_dormant - test if carrier present
3195 * @dev: network device
3197 * Check if carrier is present on device
3199 static inline bool netif_dormant(const struct net_device
*dev
)
3201 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
3206 * netif_oper_up - test if device is operational
3207 * @dev: network device
3209 * Check if carrier is operational
3211 static inline bool netif_oper_up(const struct net_device
*dev
)
3213 return (dev
->operstate
== IF_OPER_UP
||
3214 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
3218 * netif_device_present - is device available or removed
3219 * @dev: network device
3221 * Check if device has not been removed from system.
3223 static inline bool netif_device_present(struct net_device
*dev
)
3225 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
3228 void netif_device_detach(struct net_device
*dev
);
3230 void netif_device_attach(struct net_device
*dev
);
3233 * Network interface message level settings
3237 NETIF_MSG_DRV
= 0x0001,
3238 NETIF_MSG_PROBE
= 0x0002,
3239 NETIF_MSG_LINK
= 0x0004,
3240 NETIF_MSG_TIMER
= 0x0008,
3241 NETIF_MSG_IFDOWN
= 0x0010,
3242 NETIF_MSG_IFUP
= 0x0020,
3243 NETIF_MSG_RX_ERR
= 0x0040,
3244 NETIF_MSG_TX_ERR
= 0x0080,
3245 NETIF_MSG_TX_QUEUED
= 0x0100,
3246 NETIF_MSG_INTR
= 0x0200,
3247 NETIF_MSG_TX_DONE
= 0x0400,
3248 NETIF_MSG_RX_STATUS
= 0x0800,
3249 NETIF_MSG_PKTDATA
= 0x1000,
3250 NETIF_MSG_HW
= 0x2000,
3251 NETIF_MSG_WOL
= 0x4000,
3254 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3255 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3256 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3257 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3258 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3259 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3260 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3261 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3262 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3263 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3264 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3265 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3266 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3267 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3268 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3270 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
3273 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
3274 return default_msg_enable_bits
;
3275 if (debug_value
== 0) /* no output */
3277 /* set low N bits */
3278 return (1 << debug_value
) - 1;
3281 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
3283 spin_lock(&txq
->_xmit_lock
);
3284 txq
->xmit_lock_owner
= cpu
;
3287 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
3289 spin_lock_bh(&txq
->_xmit_lock
);
3290 txq
->xmit_lock_owner
= smp_processor_id();
3293 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
3295 bool ok
= spin_trylock(&txq
->_xmit_lock
);
3297 txq
->xmit_lock_owner
= smp_processor_id();
3301 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
3303 txq
->xmit_lock_owner
= -1;
3304 spin_unlock(&txq
->_xmit_lock
);
3307 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
3309 txq
->xmit_lock_owner
= -1;
3310 spin_unlock_bh(&txq
->_xmit_lock
);
3313 static inline void txq_trans_update(struct netdev_queue
*txq
)
3315 if (txq
->xmit_lock_owner
!= -1)
3316 txq
->trans_start
= jiffies
;
3320 * netif_tx_lock - grab network device transmit lock
3321 * @dev: network device
3323 * Get network device transmit lock
3325 static inline void netif_tx_lock(struct net_device
*dev
)
3330 spin_lock(&dev
->tx_global_lock
);
3331 cpu
= smp_processor_id();
3332 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3333 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3335 /* We are the only thread of execution doing a
3336 * freeze, but we have to grab the _xmit_lock in
3337 * order to synchronize with threads which are in
3338 * the ->hard_start_xmit() handler and already
3339 * checked the frozen bit.
3341 __netif_tx_lock(txq
, cpu
);
3342 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3343 __netif_tx_unlock(txq
);
3347 static inline void netif_tx_lock_bh(struct net_device
*dev
)
3353 static inline void netif_tx_unlock(struct net_device
*dev
)
3357 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3358 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3360 /* No need to grab the _xmit_lock here. If the
3361 * queue is not stopped for another reason, we
3364 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3365 netif_schedule_queue(txq
);
3367 spin_unlock(&dev
->tx_global_lock
);
3370 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
3372 netif_tx_unlock(dev
);
3376 #define HARD_TX_LOCK(dev, txq, cpu) { \
3377 if ((dev->features & NETIF_F_LLTX) == 0) { \
3378 __netif_tx_lock(txq, cpu); \
3382 #define HARD_TX_TRYLOCK(dev, txq) \
3383 (((dev->features & NETIF_F_LLTX) == 0) ? \
3384 __netif_tx_trylock(txq) : \
3387 #define HARD_TX_UNLOCK(dev, txq) { \
3388 if ((dev->features & NETIF_F_LLTX) == 0) { \
3389 __netif_tx_unlock(txq); \
3393 static inline void netif_tx_disable(struct net_device
*dev
)
3399 cpu
= smp_processor_id();
3400 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3401 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3403 __netif_tx_lock(txq
, cpu
);
3404 netif_tx_stop_queue(txq
);
3405 __netif_tx_unlock(txq
);
3410 static inline void netif_addr_lock(struct net_device
*dev
)
3412 spin_lock(&dev
->addr_list_lock
);
3415 static inline void netif_addr_lock_nested(struct net_device
*dev
)
3417 int subclass
= SINGLE_DEPTH_NESTING
;
3419 if (dev
->netdev_ops
->ndo_get_lock_subclass
)
3420 subclass
= dev
->netdev_ops
->ndo_get_lock_subclass(dev
);
3422 spin_lock_nested(&dev
->addr_list_lock
, subclass
);
3425 static inline void netif_addr_lock_bh(struct net_device
*dev
)
3427 spin_lock_bh(&dev
->addr_list_lock
);
3430 static inline void netif_addr_unlock(struct net_device
*dev
)
3432 spin_unlock(&dev
->addr_list_lock
);
3435 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
3437 spin_unlock_bh(&dev
->addr_list_lock
);
3441 * dev_addrs walker. Should be used only for read access. Call with
3442 * rcu_read_lock held.
3444 #define for_each_dev_addr(dev, ha) \
3445 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3447 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3449 void ether_setup(struct net_device
*dev
);
3451 /* Support for loadable net-drivers */
3452 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
3453 unsigned char name_assign_type
,
3454 void (*setup
)(struct net_device
*),
3455 unsigned int txqs
, unsigned int rxqs
);
3456 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3457 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3459 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3460 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3463 int register_netdev(struct net_device
*dev
);
3464 void unregister_netdev(struct net_device
*dev
);
3466 /* General hardware address lists handling functions */
3467 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
3468 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3469 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
3470 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3471 int __hw_addr_sync_dev(struct netdev_hw_addr_list
*list
,
3472 struct net_device
*dev
,
3473 int (*sync
)(struct net_device
*, const unsigned char *),
3474 int (*unsync
)(struct net_device
*,
3475 const unsigned char *));
3476 void __hw_addr_unsync_dev(struct netdev_hw_addr_list
*list
,
3477 struct net_device
*dev
,
3478 int (*unsync
)(struct net_device
*,
3479 const unsigned char *));
3480 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
3482 /* Functions used for device addresses handling */
3483 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
3484 unsigned char addr_type
);
3485 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
3486 unsigned char addr_type
);
3487 void dev_addr_flush(struct net_device
*dev
);
3488 int dev_addr_init(struct net_device
*dev
);
3490 /* Functions used for unicast addresses handling */
3491 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
3492 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3493 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
3494 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
3495 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3496 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
3497 void dev_uc_flush(struct net_device
*dev
);
3498 void dev_uc_init(struct net_device
*dev
);
3501 * __dev_uc_sync - Synchonize device's unicast list
3502 * @dev: device to sync
3503 * @sync: function to call if address should be added
3504 * @unsync: function to call if address should be removed
3506 * Add newly added addresses to the interface, and release
3507 * addresses that have been deleted.
3509 static inline int __dev_uc_sync(struct net_device
*dev
,
3510 int (*sync
)(struct net_device
*,
3511 const unsigned char *),
3512 int (*unsync
)(struct net_device
*,
3513 const unsigned char *))
3515 return __hw_addr_sync_dev(&dev
->uc
, dev
, sync
, unsync
);
3519 * __dev_uc_unsync - Remove synchronized addresses from device
3520 * @dev: device to sync
3521 * @unsync: function to call if address should be removed
3523 * Remove all addresses that were added to the device by dev_uc_sync().
3525 static inline void __dev_uc_unsync(struct net_device
*dev
,
3526 int (*unsync
)(struct net_device
*,
3527 const unsigned char *))
3529 __hw_addr_unsync_dev(&dev
->uc
, dev
, unsync
);
3532 /* Functions used for multicast addresses handling */
3533 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
3534 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
3535 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3536 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
3537 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
3538 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
3539 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3540 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
3541 void dev_mc_flush(struct net_device
*dev
);
3542 void dev_mc_init(struct net_device
*dev
);
3545 * __dev_mc_sync - Synchonize device's multicast list
3546 * @dev: device to sync
3547 * @sync: function to call if address should be added
3548 * @unsync: function to call if address should be removed
3550 * Add newly added addresses to the interface, and release
3551 * addresses that have been deleted.
3553 static inline int __dev_mc_sync(struct net_device
*dev
,
3554 int (*sync
)(struct net_device
*,
3555 const unsigned char *),
3556 int (*unsync
)(struct net_device
*,
3557 const unsigned char *))
3559 return __hw_addr_sync_dev(&dev
->mc
, dev
, sync
, unsync
);
3563 * __dev_mc_unsync - Remove synchronized addresses from device
3564 * @dev: device to sync
3565 * @unsync: function to call if address should be removed
3567 * Remove all addresses that were added to the device by dev_mc_sync().
3569 static inline void __dev_mc_unsync(struct net_device
*dev
,
3570 int (*unsync
)(struct net_device
*,
3571 const unsigned char *))
3573 __hw_addr_unsync_dev(&dev
->mc
, dev
, unsync
);
3576 /* Functions used for secondary unicast and multicast support */
3577 void dev_set_rx_mode(struct net_device
*dev
);
3578 void __dev_set_rx_mode(struct net_device
*dev
);
3579 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
3580 int dev_set_allmulti(struct net_device
*dev
, int inc
);
3581 void netdev_state_change(struct net_device
*dev
);
3582 void netdev_notify_peers(struct net_device
*dev
);
3583 void netdev_features_change(struct net_device
*dev
);
3584 /* Load a device via the kmod */
3585 void dev_load(struct net
*net
, const char *name
);
3586 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
3587 struct rtnl_link_stats64
*storage
);
3588 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
3589 const struct net_device_stats
*netdev_stats
);
3591 extern int netdev_max_backlog
;
3592 extern int netdev_tstamp_prequeue
;
3593 extern int weight_p
;
3594 extern int bpf_jit_enable
;
3596 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
3597 struct net_device
*netdev_upper_get_next_dev_rcu(struct net_device
*dev
,
3598 struct list_head
**iter
);
3599 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
3600 struct list_head
**iter
);
3602 /* iterate through upper list, must be called under RCU read lock */
3603 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3604 for (iter = &(dev)->adj_list.upper, \
3605 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3607 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3609 /* iterate through upper list, must be called under RCU read lock */
3610 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3611 for (iter = &(dev)->all_adj_list.upper, \
3612 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3614 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3616 void *netdev_lower_get_next_private(struct net_device
*dev
,
3617 struct list_head
**iter
);
3618 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
3619 struct list_head
**iter
);
3621 #define netdev_for_each_lower_private(dev, priv, iter) \
3622 for (iter = (dev)->adj_list.lower.next, \
3623 priv = netdev_lower_get_next_private(dev, &(iter)); \
3625 priv = netdev_lower_get_next_private(dev, &(iter)))
3627 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3628 for (iter = &(dev)->adj_list.lower, \
3629 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3631 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3633 void *netdev_lower_get_next(struct net_device
*dev
,
3634 struct list_head
**iter
);
3635 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3636 for (iter = &(dev)->adj_list.lower, \
3637 ldev = netdev_lower_get_next(dev, &(iter)); \
3639 ldev = netdev_lower_get_next(dev, &(iter)))
3641 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
3642 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
3643 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
3644 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
3645 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
);
3646 int netdev_master_upper_dev_link(struct net_device
*dev
,
3647 struct net_device
*upper_dev
,
3648 void *upper_priv
, void *upper_info
);
3649 void netdev_upper_dev_unlink(struct net_device
*dev
,
3650 struct net_device
*upper_dev
);
3651 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
3652 void *netdev_lower_dev_get_private(struct net_device
*dev
,
3653 struct net_device
*lower_dev
);
3654 void netdev_lower_state_changed(struct net_device
*lower_dev
,
3655 void *lower_state_info
);
3657 /* RSS keys are 40 or 52 bytes long */
3658 #define NETDEV_RSS_KEY_LEN 52
3659 extern u8 netdev_rss_key
[NETDEV_RSS_KEY_LEN
];
3660 void netdev_rss_key_fill(void *buffer
, size_t len
);
3662 int dev_get_nest_level(struct net_device
*dev
,
3663 bool (*type_check
)(struct net_device
*dev
));
3664 int skb_checksum_help(struct sk_buff
*skb
);
3665 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
3666 netdev_features_t features
, bool tx_path
);
3667 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
3668 netdev_features_t features
);
3670 struct netdev_bonding_info
{
3675 struct netdev_notifier_bonding_info
{
3676 struct netdev_notifier_info info
; /* must be first */
3677 struct netdev_bonding_info bonding_info
;
3680 void netdev_bonding_info_change(struct net_device
*dev
,
3681 struct netdev_bonding_info
*bonding_info
);
3684 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
3686 return __skb_gso_segment(skb
, features
, true);
3688 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
3690 static inline bool can_checksum_protocol(netdev_features_t features
,
3693 return ((features
& NETIF_F_GEN_CSUM
) ||
3694 ((features
& NETIF_F_V4_CSUM
) &&
3695 protocol
== htons(ETH_P_IP
)) ||
3696 ((features
& NETIF_F_V6_CSUM
) &&
3697 protocol
== htons(ETH_P_IPV6
)) ||
3698 ((features
& NETIF_F_FCOE_CRC
) &&
3699 protocol
== htons(ETH_P_FCOE
)));
3703 void netdev_rx_csum_fault(struct net_device
*dev
);
3705 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
3709 /* rx skb timestamps */
3710 void net_enable_timestamp(void);
3711 void net_disable_timestamp(void);
3713 #ifdef CONFIG_PROC_FS
3714 int __init
dev_proc_init(void);
3716 #define dev_proc_init() 0
3719 static inline netdev_tx_t
__netdev_start_xmit(const struct net_device_ops
*ops
,
3720 struct sk_buff
*skb
, struct net_device
*dev
,
3723 skb
->xmit_more
= more
? 1 : 0;
3724 return ops
->ndo_start_xmit(skb
, dev
);
3727 static inline netdev_tx_t
netdev_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
3728 struct netdev_queue
*txq
, bool more
)
3730 const struct net_device_ops
*ops
= dev
->netdev_ops
;
3733 rc
= __netdev_start_xmit(ops
, skb
, dev
, more
);
3734 if (rc
== NETDEV_TX_OK
)
3735 txq_trans_update(txq
);
3740 int netdev_class_create_file_ns(struct class_attribute
*class_attr
,
3742 void netdev_class_remove_file_ns(struct class_attribute
*class_attr
,
3745 static inline int netdev_class_create_file(struct class_attribute
*class_attr
)
3747 return netdev_class_create_file_ns(class_attr
, NULL
);
3750 static inline void netdev_class_remove_file(struct class_attribute
*class_attr
)
3752 netdev_class_remove_file_ns(class_attr
, NULL
);
3755 extern struct kobj_ns_type_operations net_ns_type_operations
;
3757 const char *netdev_drivername(const struct net_device
*dev
);
3759 void linkwatch_run_queue(void);
3761 static inline netdev_features_t
netdev_intersect_features(netdev_features_t f1
,
3762 netdev_features_t f2
)
3764 if (f1
& NETIF_F_GEN_CSUM
)
3765 f1
|= (NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3766 if (f2
& NETIF_F_GEN_CSUM
)
3767 f2
|= (NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3769 if (f1
& NETIF_F_GEN_CSUM
)
3770 f1
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3775 static inline netdev_features_t
netdev_get_wanted_features(
3776 struct net_device
*dev
)
3778 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
3780 netdev_features_t
netdev_increment_features(netdev_features_t all
,
3781 netdev_features_t one
, netdev_features_t mask
);
3783 /* Allow TSO being used on stacked device :
3784 * Performing the GSO segmentation before last device
3785 * is a performance improvement.
3787 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
3788 netdev_features_t mask
)
3790 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
3793 int __netdev_update_features(struct net_device
*dev
);
3794 void netdev_update_features(struct net_device
*dev
);
3795 void netdev_change_features(struct net_device
*dev
);
3797 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
3798 struct net_device
*dev
);
3800 netdev_features_t
passthru_features_check(struct sk_buff
*skb
,
3801 struct net_device
*dev
,
3802 netdev_features_t features
);
3803 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
3805 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
3807 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
3809 /* check flags correspondence */
3810 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
3811 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
3812 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
3813 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
3814 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
3815 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
3816 BUILD_BUG_ON(SKB_GSO_GRE
!= (NETIF_F_GSO_GRE
>> NETIF_F_GSO_SHIFT
));
3817 BUILD_BUG_ON(SKB_GSO_GRE_CSUM
!= (NETIF_F_GSO_GRE_CSUM
>> NETIF_F_GSO_SHIFT
));
3818 BUILD_BUG_ON(SKB_GSO_IPIP
!= (NETIF_F_GSO_IPIP
>> NETIF_F_GSO_SHIFT
));
3819 BUILD_BUG_ON(SKB_GSO_SIT
!= (NETIF_F_GSO_SIT
>> NETIF_F_GSO_SHIFT
));
3820 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL
!= (NETIF_F_GSO_UDP_TUNNEL
>> NETIF_F_GSO_SHIFT
));
3821 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM
!= (NETIF_F_GSO_UDP_TUNNEL_CSUM
>> NETIF_F_GSO_SHIFT
));
3822 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM
!= (NETIF_F_GSO_TUNNEL_REMCSUM
>> NETIF_F_GSO_SHIFT
));
3824 return (features
& feature
) == feature
;
3827 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
3829 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
3830 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
3833 static inline bool netif_needs_gso(struct sk_buff
*skb
,
3834 netdev_features_t features
)
3836 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
3837 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
3838 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
3841 static inline void netif_set_gso_max_size(struct net_device
*dev
,
3844 dev
->gso_max_size
= size
;
3847 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
3848 int pulled_hlen
, u16 mac_offset
,
3851 skb
->protocol
= protocol
;
3852 skb
->encapsulation
= 1;
3853 skb_push(skb
, pulled_hlen
);
3854 skb_reset_transport_header(skb
);
3855 skb
->mac_header
= mac_offset
;
3856 skb
->network_header
= skb
->mac_header
+ mac_len
;
3857 skb
->mac_len
= mac_len
;
3860 static inline bool netif_is_macvlan(struct net_device
*dev
)
3862 return dev
->priv_flags
& IFF_MACVLAN
;
3865 static inline bool netif_is_macvlan_port(struct net_device
*dev
)
3867 return dev
->priv_flags
& IFF_MACVLAN_PORT
;
3870 static inline bool netif_is_ipvlan(struct net_device
*dev
)
3872 return dev
->priv_flags
& IFF_IPVLAN_SLAVE
;
3875 static inline bool netif_is_ipvlan_port(struct net_device
*dev
)
3877 return dev
->priv_flags
& IFF_IPVLAN_MASTER
;
3880 static inline bool netif_is_bond_master(struct net_device
*dev
)
3882 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
3885 static inline bool netif_is_bond_slave(struct net_device
*dev
)
3887 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
3890 static inline bool netif_supports_nofcs(struct net_device
*dev
)
3892 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
3895 static inline bool netif_is_l3_master(const struct net_device
*dev
)
3897 return dev
->priv_flags
& IFF_L3MDEV_MASTER
;
3900 static inline bool netif_is_l3_slave(const struct net_device
*dev
)
3902 return dev
->priv_flags
& IFF_L3MDEV_SLAVE
;
3905 static inline bool netif_is_bridge_master(const struct net_device
*dev
)
3907 return dev
->priv_flags
& IFF_EBRIDGE
;
3910 static inline bool netif_is_bridge_port(const struct net_device
*dev
)
3912 return dev
->priv_flags
& IFF_BRIDGE_PORT
;
3915 static inline bool netif_is_ovs_master(const struct net_device
*dev
)
3917 return dev
->priv_flags
& IFF_OPENVSWITCH
;
3920 static inline bool netif_is_team_master(struct net_device
*dev
)
3922 return dev
->priv_flags
& IFF_TEAM
;
3925 static inline bool netif_is_team_port(struct net_device
*dev
)
3927 return dev
->priv_flags
& IFF_TEAM_PORT
;
3930 static inline bool netif_is_lag_master(struct net_device
*dev
)
3932 return netif_is_bond_master(dev
) || netif_is_team_master(dev
);
3935 static inline bool netif_is_lag_port(struct net_device
*dev
)
3937 return netif_is_bond_slave(dev
) || netif_is_team_port(dev
);
3940 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
3941 static inline void netif_keep_dst(struct net_device
*dev
)
3943 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
);
3946 extern struct pernet_operations __net_initdata loopback_net_ops
;
3948 /* Logging, debugging and troubleshooting/diagnostic helpers. */
3950 /* netdev_printk helpers, similar to dev_printk */
3952 static inline const char *netdev_name(const struct net_device
*dev
)
3954 if (!dev
->name
[0] || strchr(dev
->name
, '%'))
3955 return "(unnamed net_device)";
3959 static inline const char *netdev_reg_state(const struct net_device
*dev
)
3961 switch (dev
->reg_state
) {
3962 case NETREG_UNINITIALIZED
: return " (uninitialized)";
3963 case NETREG_REGISTERED
: return "";
3964 case NETREG_UNREGISTERING
: return " (unregistering)";
3965 case NETREG_UNREGISTERED
: return " (unregistered)";
3966 case NETREG_RELEASED
: return " (released)";
3967 case NETREG_DUMMY
: return " (dummy)";
3970 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev
->name
, dev
->reg_state
);
3971 return " (unknown)";
3975 void netdev_printk(const char *level
, const struct net_device
*dev
,
3976 const char *format
, ...);
3978 void netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
3980 void netdev_alert(const struct net_device
*dev
, const char *format
, ...);
3982 void netdev_crit(const struct net_device
*dev
, const char *format
, ...);
3984 void netdev_err(const struct net_device
*dev
, const char *format
, ...);
3986 void netdev_warn(const struct net_device
*dev
, const char *format
, ...);
3988 void netdev_notice(const struct net_device
*dev
, const char *format
, ...);
3990 void netdev_info(const struct net_device
*dev
, const char *format
, ...);
3992 #define MODULE_ALIAS_NETDEV(device) \
3993 MODULE_ALIAS("netdev-" device)
3995 #if defined(CONFIG_DYNAMIC_DEBUG)
3996 #define netdev_dbg(__dev, format, args...) \
3998 dynamic_netdev_dbg(__dev, format, ##args); \
4000 #elif defined(DEBUG)
4001 #define netdev_dbg(__dev, format, args...) \
4002 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4004 #define netdev_dbg(__dev, format, args...) \
4007 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4011 #if defined(VERBOSE_DEBUG)
4012 #define netdev_vdbg netdev_dbg
4015 #define netdev_vdbg(dev, format, args...) \
4018 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4024 * netdev_WARN() acts like dev_printk(), but with the key difference
4025 * of using a WARN/WARN_ON to get the message out, including the
4026 * file/line information and a backtrace.
4028 #define netdev_WARN(dev, format, args...) \
4029 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
4030 netdev_reg_state(dev), ##args)
4032 /* netif printk helpers, similar to netdev_printk */
4034 #define netif_printk(priv, type, level, dev, fmt, args...) \
4036 if (netif_msg_##type(priv)) \
4037 netdev_printk(level, (dev), fmt, ##args); \
4040 #define netif_level(level, priv, type, dev, fmt, args...) \
4042 if (netif_msg_##type(priv)) \
4043 netdev_##level(dev, fmt, ##args); \
4046 #define netif_emerg(priv, type, dev, fmt, args...) \
4047 netif_level(emerg, priv, type, dev, fmt, ##args)
4048 #define netif_alert(priv, type, dev, fmt, args...) \
4049 netif_level(alert, priv, type, dev, fmt, ##args)
4050 #define netif_crit(priv, type, dev, fmt, args...) \
4051 netif_level(crit, priv, type, dev, fmt, ##args)
4052 #define netif_err(priv, type, dev, fmt, args...) \
4053 netif_level(err, priv, type, dev, fmt, ##args)
4054 #define netif_warn(priv, type, dev, fmt, args...) \
4055 netif_level(warn, priv, type, dev, fmt, ##args)
4056 #define netif_notice(priv, type, dev, fmt, args...) \
4057 netif_level(notice, priv, type, dev, fmt, ##args)
4058 #define netif_info(priv, type, dev, fmt, args...) \
4059 netif_level(info, priv, type, dev, fmt, ##args)
4061 #if defined(CONFIG_DYNAMIC_DEBUG)
4062 #define netif_dbg(priv, type, netdev, format, args...) \
4064 if (netif_msg_##type(priv)) \
4065 dynamic_netdev_dbg(netdev, format, ##args); \
4067 #elif defined(DEBUG)
4068 #define netif_dbg(priv, type, dev, format, args...) \
4069 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4071 #define netif_dbg(priv, type, dev, format, args...) \
4074 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4079 #if defined(VERBOSE_DEBUG)
4080 #define netif_vdbg netif_dbg
4082 #define netif_vdbg(priv, type, dev, format, args...) \
4085 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4091 * The list of packet types we will receive (as opposed to discard)
4092 * and the routines to invoke.
4094 * Why 16. Because with 16 the only overlap we get on a hash of the
4095 * low nibble of the protocol value is RARP/SNAP/X.25.
4097 * NOTE: That is no longer true with the addition of VLAN tags. Not
4098 * sure which should go first, but I bet it won't make much
4099 * difference if we are running VLANs. The good news is that
4100 * this protocol won't be in the list unless compiled in, so
4101 * the average user (w/out VLANs) will not be adversely affected.
4117 #define PTYPE_HASH_SIZE (16)
4118 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4120 #endif /* _LINUX_NETDEVICE_H */