2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/pm_qos.h>
29 #include <linux/timer.h>
30 #include <linux/bug.h>
31 #include <linux/delay.h>
32 #include <linux/atomic.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
64 const struct ethtool_ops
*ops
);
66 /* hardware address assignment types */
67 #define NET_ADDR_PERM 0 /* address is permanent (default) */
68 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
69 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
70 #define NET_ADDR_SET 3 /* address is set using
71 * dev_set_mac_address() */
73 /* Backlog congestion levels */
74 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
75 #define NET_RX_DROP 1 /* packet dropped */
78 * Transmit return codes: transmit return codes originate from three different
81 * - qdisc return codes
82 * - driver transmit return codes
85 * Drivers are allowed to return any one of those in their hard_start_xmit()
86 * function. Real network devices commonly used with qdiscs should only return
87 * the driver transmit return codes though - when qdiscs are used, the actual
88 * transmission happens asynchronously, so the value is not propagated to
89 * higher layers. Virtual network devices transmit synchronously, in this case
90 * the driver transmit return codes are consumed by dev_queue_xmit(), all
91 * others are propagated to higher layers.
94 /* qdisc ->enqueue() return codes. */
95 #define NET_XMIT_SUCCESS 0x00
96 #define NET_XMIT_DROP 0x01 /* skb dropped */
97 #define NET_XMIT_CN 0x02 /* congestion notification */
98 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
99 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
101 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
102 * indicates that the device will soon be dropping packets, or already drops
103 * some packets of the same priority; prompting us to send less aggressively. */
104 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
105 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107 /* Driver transmit return codes */
108 #define NETDEV_TX_MASK 0xf0
111 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
112 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
113 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
114 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
116 typedef enum netdev_tx netdev_tx_t
;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc
)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc
< NET_XMIT_MASK
))
137 * Compute the worst case header length according to the protocols
141 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
148 # define LL_MAX_HEADER 32
151 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
152 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
153 #define MAX_HEADER LL_MAX_HEADER
155 #define MAX_HEADER (LL_MAX_HEADER + 48)
159 * Old network device statistics. Fields are native words
160 * (unsigned long) so they can be read and written atomically.
163 struct net_device_stats
{
164 unsigned long rx_packets
;
165 unsigned long tx_packets
;
166 unsigned long rx_bytes
;
167 unsigned long tx_bytes
;
168 unsigned long rx_errors
;
169 unsigned long tx_errors
;
170 unsigned long rx_dropped
;
171 unsigned long tx_dropped
;
172 unsigned long multicast
;
173 unsigned long collisions
;
174 unsigned long rx_length_errors
;
175 unsigned long rx_over_errors
;
176 unsigned long rx_crc_errors
;
177 unsigned long rx_frame_errors
;
178 unsigned long rx_fifo_errors
;
179 unsigned long rx_missed_errors
;
180 unsigned long tx_aborted_errors
;
181 unsigned long tx_carrier_errors
;
182 unsigned long tx_fifo_errors
;
183 unsigned long tx_heartbeat_errors
;
184 unsigned long tx_window_errors
;
185 unsigned long rx_compressed
;
186 unsigned long tx_compressed
;
190 #include <linux/cache.h>
191 #include <linux/skbuff.h>
194 #include <linux/static_key.h>
195 extern struct static_key rps_needed
;
202 struct netdev_hw_addr
{
203 struct list_head list
;
204 unsigned char addr
[MAX_ADDR_LEN
];
206 #define NETDEV_HW_ADDR_T_LAN 1
207 #define NETDEV_HW_ADDR_T_SAN 2
208 #define NETDEV_HW_ADDR_T_SLAVE 3
209 #define NETDEV_HW_ADDR_T_UNICAST 4
210 #define NETDEV_HW_ADDR_T_MULTICAST 5
215 struct rcu_head rcu_head
;
218 struct netdev_hw_addr_list
{
219 struct list_head list
;
223 #define netdev_hw_addr_list_count(l) ((l)->count)
224 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
225 #define netdev_hw_addr_list_for_each(ha, l) \
226 list_for_each_entry(ha, &(l)->list, list)
228 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
229 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
230 #define netdev_for_each_uc_addr(ha, dev) \
231 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
233 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
234 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
235 #define netdev_for_each_mc_addr(ha, dev) \
236 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 #define LL_RESERVED_SPACE(dev) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
267 unsigned short type
, const void *daddr
,
268 const void *saddr
, unsigned int len
);
269 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
270 int (*rebuild
)(struct sk_buff
*skb
);
271 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
272 void (*cache_update
)(struct hh_cache
*hh
,
273 const struct net_device
*dev
,
274 const unsigned char *haddr
);
277 /* These flag bits are private to the generic network queueing
278 * layer, they may not be explicitly referenced by any other
282 enum netdev_state_t
{
284 __LINK_STATE_PRESENT
,
285 __LINK_STATE_NOCARRIER
,
286 __LINK_STATE_LINKWATCH_PENDING
,
287 __LINK_STATE_DORMANT
,
292 * This structure holds at boot time configured netdevice settings. They
293 * are then used in the device probing.
295 struct netdev_boot_setup
{
299 #define NETDEV_BOOT_SETUP_MAX 8
301 int __init
netdev_boot_setup(char *str
);
304 * Structure for NAPI scheduling similar to tasklet but with weighting
307 /* The poll_list must only be managed by the entity which
308 * changes the state of the NAPI_STATE_SCHED bit. This means
309 * whoever atomically sets that bit can add this napi_struct
310 * to the per-cpu poll_list, and whoever clears that bit
311 * can remove from the list right before clearing the bit.
313 struct list_head poll_list
;
317 unsigned int gro_count
;
318 int (*poll
)(struct napi_struct
*, int);
319 #ifdef CONFIG_NETPOLL
320 spinlock_t poll_lock
;
323 struct net_device
*dev
;
324 struct sk_buff
*gro_list
;
326 struct list_head dev_list
;
327 struct hlist_node napi_hash_node
;
328 unsigned int napi_id
;
332 NAPI_STATE_SCHED
, /* Poll is scheduled */
333 NAPI_STATE_DISABLE
, /* Disable pending */
334 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
335 NAPI_STATE_HASHED
, /* In NAPI hash */
345 typedef enum gro_result gro_result_t
;
348 * enum rx_handler_result - Possible return values for rx_handlers.
349 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
351 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
352 * case skb->dev was changed by rx_handler.
353 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
354 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
356 * rx_handlers are functions called from inside __netif_receive_skb(), to do
357 * special processing of the skb, prior to delivery to protocol handlers.
359 * Currently, a net_device can only have a single rx_handler registered. Trying
360 * to register a second rx_handler will return -EBUSY.
362 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
363 * To unregister a rx_handler on a net_device, use
364 * netdev_rx_handler_unregister().
366 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
369 * If the rx_handler consumed to skb in some way, it should return
370 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
371 * the skb to be delivered in some other ways.
373 * If the rx_handler changed skb->dev, to divert the skb to another
374 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
375 * new device will be called if it exists.
377 * If the rx_handler consider the skb should be ignored, it should return
378 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
379 * are registered on exact device (ptype->dev == skb->dev).
381 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
382 * delivered, it should return RX_HANDLER_PASS.
384 * A device without a registered rx_handler will behave as if rx_handler
385 * returned RX_HANDLER_PASS.
388 enum rx_handler_result
{
394 typedef enum rx_handler_result rx_handler_result_t
;
395 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
397 void __napi_schedule(struct napi_struct
*n
);
399 static inline bool napi_disable_pending(struct napi_struct
*n
)
401 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
405 * napi_schedule_prep - check if napi can be scheduled
408 * Test if NAPI routine is already running, and if not mark
409 * it as running. This is used as a condition variable
410 * insure only one NAPI poll instance runs. We also make
411 * sure there is no pending NAPI disable.
413 static inline bool napi_schedule_prep(struct napi_struct
*n
)
415 return !napi_disable_pending(n
) &&
416 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
420 * napi_schedule - schedule NAPI poll
423 * Schedule NAPI poll routine to be called if it is not already
426 static inline void napi_schedule(struct napi_struct
*n
)
428 if (napi_schedule_prep(n
))
432 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
433 static inline bool napi_reschedule(struct napi_struct
*napi
)
435 if (napi_schedule_prep(napi
)) {
436 __napi_schedule(napi
);
443 * napi_complete - NAPI processing complete
446 * Mark NAPI processing as complete.
448 void __napi_complete(struct napi_struct
*n
);
449 void napi_complete(struct napi_struct
*n
);
452 * napi_by_id - lookup a NAPI by napi_id
453 * @napi_id: hashed napi_id
455 * lookup @napi_id in napi_hash table
456 * must be called under rcu_read_lock()
458 struct napi_struct
*napi_by_id(unsigned int napi_id
);
461 * napi_hash_add - add a NAPI to global hashtable
462 * @napi: napi context
464 * generate a new napi_id and store a @napi under it in napi_hash
466 void napi_hash_add(struct napi_struct
*napi
);
469 * napi_hash_del - remove a NAPI from global table
470 * @napi: napi context
472 * Warning: caller must observe rcu grace period
473 * before freeing memory containing @napi
475 void napi_hash_del(struct napi_struct
*napi
);
478 * napi_disable - prevent NAPI from scheduling
481 * Stop NAPI from being scheduled on this context.
482 * Waits till any outstanding processing completes.
484 static inline void napi_disable(struct napi_struct
*n
)
487 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
488 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
490 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
494 * napi_enable - enable NAPI scheduling
497 * Resume NAPI from being scheduled on this context.
498 * Must be paired with napi_disable.
500 static inline void napi_enable(struct napi_struct
*n
)
502 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
503 smp_mb__before_clear_bit();
504 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
509 * napi_synchronize - wait until NAPI is not running
512 * Wait until NAPI is done being scheduled on this context.
513 * Waits till any outstanding processing completes but
514 * does not disable future activations.
516 static inline void napi_synchronize(const struct napi_struct
*n
)
518 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
522 # define napi_synchronize(n) barrier()
525 enum netdev_queue_state_t
{
526 __QUEUE_STATE_DRV_XOFF
,
527 __QUEUE_STATE_STACK_XOFF
,
528 __QUEUE_STATE_FROZEN
,
529 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
530 (1 << __QUEUE_STATE_STACK_XOFF))
531 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
532 (1 << __QUEUE_STATE_FROZEN))
535 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
536 * netif_tx_* functions below are used to manipulate this flag. The
537 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
538 * queue independently. The netif_xmit_*stopped functions below are called
539 * to check if the queue has been stopped by the driver or stack (either
540 * of the XOFF bits are set in the state). Drivers should not need to call
541 * netif_xmit*stopped functions, they should only be using netif_tx_*.
544 struct netdev_queue
{
548 struct net_device
*dev
;
550 struct Qdisc
*qdisc_sleeping
;
554 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
560 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
563 * please use this field instead of dev->trans_start
565 unsigned long trans_start
;
568 * Number of TX timeouts for this queue
569 * (/sys/class/net/DEV/Q/trans_timeout)
571 unsigned long trans_timeout
;
578 } ____cacheline_aligned_in_smp
;
580 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
582 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
589 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
591 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
598 * This structure holds an RPS map which can be of variable length. The
599 * map is an array of CPUs.
606 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
609 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
610 * tail pointer for that CPU's input queue at the time of last enqueue, and
611 * a hardware filter index.
613 struct rps_dev_flow
{
616 unsigned int last_qtail
;
618 #define RPS_NO_FILTER 0xffff
621 * The rps_dev_flow_table structure contains a table of flow mappings.
623 struct rps_dev_flow_table
{
626 struct rps_dev_flow flows
[0];
628 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
629 ((_num) * sizeof(struct rps_dev_flow)))
632 * The rps_sock_flow_table contains mappings of flows to the last CPU
633 * on which they were processed by the application (set in recvmsg).
635 struct rps_sock_flow_table
{
639 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
640 ((_num) * sizeof(u16)))
642 #define RPS_NO_CPU 0xffff
644 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
648 unsigned int cpu
, index
= hash
& table
->mask
;
650 /* We only give a hint, preemption can change cpu under us */
651 cpu
= raw_smp_processor_id();
653 if (table
->ents
[index
] != cpu
)
654 table
->ents
[index
] = cpu
;
658 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
662 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
665 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
667 #ifdef CONFIG_RFS_ACCEL
668 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
671 #endif /* CONFIG_RPS */
673 /* This structure contains an instance of an RX queue. */
674 struct netdev_rx_queue
{
676 struct rps_map __rcu
*rps_map
;
677 struct rps_dev_flow_table __rcu
*rps_flow_table
;
680 struct net_device
*dev
;
681 } ____cacheline_aligned_in_smp
;
684 * RX queue sysfs structures and functions.
686 struct rx_queue_attribute
{
687 struct attribute attr
;
688 ssize_t (*show
)(struct netdev_rx_queue
*queue
,
689 struct rx_queue_attribute
*attr
, char *buf
);
690 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
691 struct rx_queue_attribute
*attr
, const char *buf
, size_t len
);
696 * This structure holds an XPS map which can be of variable length. The
697 * map is an array of queues.
701 unsigned int alloc_len
;
705 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
706 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
710 * This structure holds all XPS maps for device. Maps are indexed by CPU.
712 struct xps_dev_maps
{
714 struct xps_map __rcu
*cpu_map
[0];
716 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
717 (nr_cpu_ids * sizeof(struct xps_map *)))
718 #endif /* CONFIG_XPS */
720 #define TC_MAX_QUEUE 16
721 #define TC_BITMASK 15
722 /* HW offloaded queuing disciplines txq count and offset maps */
723 struct netdev_tc_txq
{
728 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
730 * This structure is to hold information about the device
731 * configured to run FCoE protocol stack.
733 struct netdev_fcoe_hbainfo
{
734 char manufacturer
[64];
735 char serial_number
[64];
736 char hardware_version
[64];
737 char driver_version
[64];
738 char optionrom_version
[64];
739 char firmware_version
[64];
741 char model_description
[256];
745 #define MAX_PHYS_PORT_ID_LEN 32
747 /* This structure holds a unique identifier to identify the
748 * physical port used by a netdevice.
750 struct netdev_phys_port_id
{
751 unsigned char id
[MAX_PHYS_PORT_ID_LEN
];
752 unsigned char id_len
;
755 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
756 struct sk_buff
*skb
);
759 * This structure defines the management hooks for network devices.
760 * The following hooks can be defined; unless noted otherwise, they are
761 * optional and can be filled with a null pointer.
763 * int (*ndo_init)(struct net_device *dev);
764 * This function is called once when network device is registered.
765 * The network device can use this to any late stage initializaton
766 * or semantic validattion. It can fail with an error code which will
767 * be propogated back to register_netdev
769 * void (*ndo_uninit)(struct net_device *dev);
770 * This function is called when device is unregistered or when registration
771 * fails. It is not called if init fails.
773 * int (*ndo_open)(struct net_device *dev);
774 * This function is called when network device transistions to the up
777 * int (*ndo_stop)(struct net_device *dev);
778 * This function is called when network device transistions to the down
781 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
782 * struct net_device *dev);
783 * Called when a packet needs to be transmitted.
784 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
785 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
786 * Required can not be NULL.
788 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
789 * void *accel_priv, select_queue_fallback_t fallback);
790 * Called to decide which queue to when device supports multiple
793 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
794 * This function is called to allow device receiver to make
795 * changes to configuration when multicast or promiscious is enabled.
797 * void (*ndo_set_rx_mode)(struct net_device *dev);
798 * This function is called device changes address list filtering.
799 * If driver handles unicast address filtering, it should set
800 * IFF_UNICAST_FLT to its priv_flags.
802 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
803 * This function is called when the Media Access Control address
804 * needs to be changed. If this interface is not defined, the
805 * mac address can not be changed.
807 * int (*ndo_validate_addr)(struct net_device *dev);
808 * Test if Media Access Control address is valid for the device.
810 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
811 * Called when a user request an ioctl which can't be handled by
812 * the generic interface code. If not defined ioctl's return
813 * not supported error code.
815 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
816 * Used to set network devices bus interface parameters. This interface
817 * is retained for legacy reason, new devices should use the bus
818 * interface (PCI) for low level management.
820 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
821 * Called when a user wants to change the Maximum Transfer Unit
822 * of a device. If not defined, any request to change MTU will
823 * will return an error.
825 * void (*ndo_tx_timeout)(struct net_device *dev);
826 * Callback uses when the transmitter has not made any progress
827 * for dev->watchdog ticks.
829 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
830 * struct rtnl_link_stats64 *storage);
831 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
832 * Called when a user wants to get the network device usage
833 * statistics. Drivers must do one of the following:
834 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
835 * rtnl_link_stats64 structure passed by the caller.
836 * 2. Define @ndo_get_stats to update a net_device_stats structure
837 * (which should normally be dev->stats) and return a pointer to
838 * it. The structure may be changed asynchronously only if each
839 * field is written atomically.
840 * 3. Update dev->stats asynchronously and atomically, and define
843 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
844 * If device support VLAN filtering this function is called when a
845 * VLAN id is registered.
847 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
848 * If device support VLAN filtering this function is called when a
849 * VLAN id is unregistered.
851 * void (*ndo_poll_controller)(struct net_device *dev);
853 * SR-IOV management functions.
854 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
855 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
856 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
857 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
858 * int (*ndo_get_vf_config)(struct net_device *dev,
859 * int vf, struct ifla_vf_info *ivf);
860 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
861 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
862 * struct nlattr *port[]);
863 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
864 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
865 * Called to setup 'tc' number of traffic classes in the net device. This
866 * is always called from the stack with the rtnl lock held and netif tx
867 * queues stopped. This allows the netdevice to perform queue management
870 * Fiber Channel over Ethernet (FCoE) offload functions.
871 * int (*ndo_fcoe_enable)(struct net_device *dev);
872 * Called when the FCoE protocol stack wants to start using LLD for FCoE
873 * so the underlying device can perform whatever needed configuration or
874 * initialization to support acceleration of FCoE traffic.
876 * int (*ndo_fcoe_disable)(struct net_device *dev);
877 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
878 * so the underlying device can perform whatever needed clean-ups to
879 * stop supporting acceleration of FCoE traffic.
881 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
882 * struct scatterlist *sgl, unsigned int sgc);
883 * Called when the FCoE Initiator wants to initialize an I/O that
884 * is a possible candidate for Direct Data Placement (DDP). The LLD can
885 * perform necessary setup and returns 1 to indicate the device is set up
886 * successfully to perform DDP on this I/O, otherwise this returns 0.
888 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
889 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
890 * indicated by the FC exchange id 'xid', so the underlying device can
891 * clean up and reuse resources for later DDP requests.
893 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
894 * struct scatterlist *sgl, unsigned int sgc);
895 * Called when the FCoE Target wants to initialize an I/O that
896 * is a possible candidate for Direct Data Placement (DDP). The LLD can
897 * perform necessary setup and returns 1 to indicate the device is set up
898 * successfully to perform DDP on this I/O, otherwise this returns 0.
900 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
901 * struct netdev_fcoe_hbainfo *hbainfo);
902 * Called when the FCoE Protocol stack wants information on the underlying
903 * device. This information is utilized by the FCoE protocol stack to
904 * register attributes with Fiber Channel management service as per the
905 * FC-GS Fabric Device Management Information(FDMI) specification.
907 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
908 * Called when the underlying device wants to override default World Wide
909 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
910 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
911 * protocol stack to use.
914 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
915 * u16 rxq_index, u32 flow_id);
916 * Set hardware filter for RFS. rxq_index is the target queue index;
917 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
918 * Return the filter ID on success, or a negative error code.
920 * Slave management functions (for bridge, bonding, etc).
921 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
922 * Called to make another netdev an underling.
924 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
925 * Called to release previously enslaved netdev.
927 * Feature/offload setting functions.
928 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
929 * netdev_features_t features);
930 * Adjusts the requested feature flags according to device-specific
931 * constraints, and returns the resulting flags. Must not modify
934 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
935 * Called to update device configuration to new features. Passed
936 * feature set might be less than what was returned by ndo_fix_features()).
937 * Must return >0 or -errno if it changed dev->features itself.
939 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
940 * struct net_device *dev,
941 * const unsigned char *addr, u16 flags)
942 * Adds an FDB entry to dev for addr.
943 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
944 * struct net_device *dev,
945 * const unsigned char *addr)
946 * Deletes the FDB entry from dev coresponding to addr.
947 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
948 * struct net_device *dev, int idx)
949 * Used to add FDB entries to dump requests. Implementers should add
950 * entries to skb and update idx with the number of entries.
952 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
953 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
954 * struct net_device *dev, u32 filter_mask)
956 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
957 * Called to change device carrier. Soft-devices (like dummy, team, etc)
958 * which do not represent real hardware may define this to allow their
959 * userspace components to manage their virtual carrier state. Devices
960 * that determine carrier state from physical hardware properties (eg
961 * network cables) or protocol-dependent mechanisms (eg
962 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
964 * int (*ndo_get_phys_port_id)(struct net_device *dev,
965 * struct netdev_phys_port_id *ppid);
966 * Called to get ID of physical port of this device. If driver does
967 * not implement this, it is assumed that the hw is not able to have
968 * multiple net devices on single physical port.
970 * void (*ndo_add_vxlan_port)(struct net_device *dev,
971 * sa_family_t sa_family, __be16 port);
972 * Called by vxlan to notiy a driver about the UDP port and socket
973 * address family that vxlan is listnening to. It is called only when
974 * a new port starts listening. The operation is protected by the
975 * vxlan_net->sock_lock.
977 * void (*ndo_del_vxlan_port)(struct net_device *dev,
978 * sa_family_t sa_family, __be16 port);
979 * Called by vxlan to notify the driver about a UDP port and socket
980 * address family that vxlan is not listening to anymore. The operation
981 * is protected by the vxlan_net->sock_lock.
983 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
984 * struct net_device *dev)
985 * Called by upper layer devices to accelerate switching or other
986 * station functionality into hardware. 'pdev is the lowerdev
987 * to use for the offload and 'dev' is the net device that will
988 * back the offload. Returns a pointer to the private structure
989 * the upper layer will maintain.
990 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
991 * Called by upper layer device to delete the station created
992 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
993 * the station and priv is the structure returned by the add
995 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
996 * struct net_device *dev,
998 * Callback to use for xmit over the accelerated station. This
999 * is used in place of ndo_start_xmit on accelerated net
1002 struct net_device_ops
{
1003 int (*ndo_init
)(struct net_device
*dev
);
1004 void (*ndo_uninit
)(struct net_device
*dev
);
1005 int (*ndo_open
)(struct net_device
*dev
);
1006 int (*ndo_stop
)(struct net_device
*dev
);
1007 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
1008 struct net_device
*dev
);
1009 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1010 struct sk_buff
*skb
,
1012 select_queue_fallback_t fallback
);
1013 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1015 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1016 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1018 int (*ndo_validate_addr
)(struct net_device
*dev
);
1019 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1020 struct ifreq
*ifr
, int cmd
);
1021 int (*ndo_set_config
)(struct net_device
*dev
,
1023 int (*ndo_change_mtu
)(struct net_device
*dev
,
1025 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1026 struct neigh_parms
*);
1027 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1029 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
1030 struct rtnl_link_stats64
*storage
);
1031 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1033 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1034 __be16 proto
, u16 vid
);
1035 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1036 __be16 proto
, u16 vid
);
1037 #ifdef CONFIG_NET_POLL_CONTROLLER
1038 void (*ndo_poll_controller
)(struct net_device
*dev
);
1039 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1040 struct netpoll_info
*info
,
1042 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1044 #ifdef CONFIG_NET_RX_BUSY_POLL
1045 int (*ndo_busy_poll
)(struct napi_struct
*dev
);
1047 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1048 int queue
, u8
*mac
);
1049 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1050 int queue
, u16 vlan
, u8 qos
);
1051 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
1053 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1054 int vf
, bool setting
);
1055 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1057 struct ifla_vf_info
*ivf
);
1058 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1059 int vf
, int link_state
);
1060 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1062 struct nlattr
*port
[]);
1063 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1064 int vf
, struct sk_buff
*skb
);
1065 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
1066 #if IS_ENABLED(CONFIG_FCOE)
1067 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1068 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1069 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1071 struct scatterlist
*sgl
,
1073 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1075 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1077 struct scatterlist
*sgl
,
1079 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1080 struct netdev_fcoe_hbainfo
*hbainfo
);
1083 #if IS_ENABLED(CONFIG_LIBFCOE)
1084 #define NETDEV_FCOE_WWNN 0
1085 #define NETDEV_FCOE_WWPN 1
1086 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1087 u64
*wwn
, int type
);
1090 #ifdef CONFIG_RFS_ACCEL
1091 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1092 const struct sk_buff
*skb
,
1096 int (*ndo_add_slave
)(struct net_device
*dev
,
1097 struct net_device
*slave_dev
);
1098 int (*ndo_del_slave
)(struct net_device
*dev
,
1099 struct net_device
*slave_dev
);
1100 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1101 netdev_features_t features
);
1102 int (*ndo_set_features
)(struct net_device
*dev
,
1103 netdev_features_t features
);
1104 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1105 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1107 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1108 struct nlattr
*tb
[],
1109 struct net_device
*dev
,
1110 const unsigned char *addr
,
1112 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1113 struct nlattr
*tb
[],
1114 struct net_device
*dev
,
1115 const unsigned char *addr
);
1116 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1117 struct netlink_callback
*cb
,
1118 struct net_device
*dev
,
1121 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1122 struct nlmsghdr
*nlh
);
1123 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1125 struct net_device
*dev
,
1127 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1128 struct nlmsghdr
*nlh
);
1129 int (*ndo_change_carrier
)(struct net_device
*dev
,
1131 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1132 struct netdev_phys_port_id
*ppid
);
1133 void (*ndo_add_vxlan_port
)(struct net_device
*dev
,
1134 sa_family_t sa_family
,
1136 void (*ndo_del_vxlan_port
)(struct net_device
*dev
,
1137 sa_family_t sa_family
,
1140 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1141 struct net_device
*dev
);
1142 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1145 netdev_tx_t (*ndo_dfwd_start_xmit
) (struct sk_buff
*skb
,
1146 struct net_device
*dev
,
1151 * enum net_device_priv_flags - &struct net_device priv_flags
1153 * These are the &struct net_device, they are only set internally
1154 * by drivers and used in the kernel. These flags are invisible to
1155 * userspace, this means that the order of these flags can change
1156 * during any kernel release.
1158 * You should have a pretty good reason to be extending these flags.
1160 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1161 * @IFF_EBRIDGE: Ethernet bridging device
1162 * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active
1163 * @IFF_MASTER_8023AD: bonding master, 802.3ad
1164 * @IFF_MASTER_ALB: bonding master, balance-alb
1165 * @IFF_BONDING: bonding master or slave
1166 * @IFF_SLAVE_NEEDARP: need ARPs for validation
1167 * @IFF_ISATAP: ISATAP interface (RFC4214)
1168 * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
1169 * @IFF_WAN_HDLC: WAN HDLC device
1170 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1172 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1173 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1174 * @IFF_MACVLAN_PORT: device used as macvlan port
1175 * @IFF_BRIDGE_PORT: device used as bridge port
1176 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1177 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1178 * @IFF_UNICAST_FLT: Supports unicast filtering
1179 * @IFF_TEAM_PORT: device used as team port
1180 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1181 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1182 * change when it's running
1183 * @IFF_MACVLAN: Macvlan device
1185 enum netdev_priv_flags
{
1186 IFF_802_1Q_VLAN
= 1<<0,
1188 IFF_SLAVE_INACTIVE
= 1<<2,
1189 IFF_MASTER_8023AD
= 1<<3,
1190 IFF_MASTER_ALB
= 1<<4,
1192 IFF_SLAVE_NEEDARP
= 1<<6,
1194 IFF_MASTER_ARPMON
= 1<<8,
1195 IFF_WAN_HDLC
= 1<<9,
1196 IFF_XMIT_DST_RELEASE
= 1<<10,
1197 IFF_DONT_BRIDGE
= 1<<11,
1198 IFF_DISABLE_NETPOLL
= 1<<12,
1199 IFF_MACVLAN_PORT
= 1<<13,
1200 IFF_BRIDGE_PORT
= 1<<14,
1201 IFF_OVS_DATAPATH
= 1<<15,
1202 IFF_TX_SKB_SHARING
= 1<<16,
1203 IFF_UNICAST_FLT
= 1<<17,
1204 IFF_TEAM_PORT
= 1<<18,
1205 IFF_SUPP_NOFCS
= 1<<19,
1206 IFF_LIVE_ADDR_CHANGE
= 1<<20,
1207 IFF_MACVLAN
= 1<<21,
1210 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1211 #define IFF_EBRIDGE IFF_EBRIDGE
1212 #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE
1213 #define IFF_MASTER_8023AD IFF_MASTER_8023AD
1214 #define IFF_MASTER_ALB IFF_MASTER_ALB
1215 #define IFF_BONDING IFF_BONDING
1216 #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP
1217 #define IFF_ISATAP IFF_ISATAP
1218 #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON
1219 #define IFF_WAN_HDLC IFF_WAN_HDLC
1220 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1221 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1222 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1223 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1224 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1225 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1226 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1227 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1228 #define IFF_TEAM_PORT IFF_TEAM_PORT
1229 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1230 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1231 #define IFF_MACVLAN IFF_MACVLAN
1234 * The DEVICE structure.
1235 * Actually, this whole structure is a big mistake. It mixes I/O
1236 * data with strictly "high-level" data, and it has to know about
1237 * almost every data structure used in the INET module.
1239 * FIXME: cleanup struct net_device such that network protocol info
1246 * This is the first field of the "visible" part of this structure
1247 * (i.e. as seen by users in the "Space.c" file). It is the name
1250 char name
[IFNAMSIZ
];
1252 /* device name hash chain, please keep it close to name[] */
1253 struct hlist_node name_hlist
;
1259 * I/O specific fields
1260 * FIXME: Merge these and struct ifmap into one
1262 unsigned long mem_end
; /* shared mem end */
1263 unsigned long mem_start
; /* shared mem start */
1264 unsigned long base_addr
; /* device I/O address */
1265 int irq
; /* device IRQ number */
1268 * Some hardware also needs these fields, but they are not
1269 * part of the usual set specified in Space.c.
1272 unsigned long state
;
1274 struct list_head dev_list
;
1275 struct list_head napi_list
;
1276 struct list_head unreg_list
;
1277 struct list_head close_list
;
1279 /* directly linked devices, like slaves for bonding */
1281 struct list_head upper
;
1282 struct list_head lower
;
1285 /* all linked devices, *including* neighbours */
1287 struct list_head upper
;
1288 struct list_head lower
;
1292 /* currently active device features */
1293 netdev_features_t features
;
1294 /* user-changeable features */
1295 netdev_features_t hw_features
;
1296 /* user-requested features */
1297 netdev_features_t wanted_features
;
1298 /* mask of features inheritable by VLAN devices */
1299 netdev_features_t vlan_features
;
1300 /* mask of features inherited by encapsulating devices
1301 * This field indicates what encapsulation offloads
1302 * the hardware is capable of doing, and drivers will
1303 * need to set them appropriately.
1305 netdev_features_t hw_enc_features
;
1306 /* mask of fetures inheritable by MPLS */
1307 netdev_features_t mpls_features
;
1309 /* Interface index. Unique device identifier */
1313 struct net_device_stats stats
;
1314 atomic_long_t rx_dropped
; /* dropped packets by core network
1315 * Do not use this in drivers.
1318 #ifdef CONFIG_WIRELESS_EXT
1319 /* List of functions to handle Wireless Extensions (instead of ioctl).
1320 * See <net/iw_handler.h> for details. Jean II */
1321 const struct iw_handler_def
* wireless_handlers
;
1322 /* Instance data managed by the core of Wireless Extensions. */
1323 struct iw_public_data
* wireless_data
;
1325 /* Management operations */
1326 const struct net_device_ops
*netdev_ops
;
1327 const struct ethtool_ops
*ethtool_ops
;
1328 const struct forwarding_accel_ops
*fwd_ops
;
1330 /* Hardware header description */
1331 const struct header_ops
*header_ops
;
1333 unsigned int flags
; /* interface flags (a la BSD) */
1334 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1335 * See if.h for definitions. */
1336 unsigned short gflags
;
1337 unsigned short padded
; /* How much padding added by alloc_netdev() */
1339 unsigned char operstate
; /* RFC2863 operstate */
1340 unsigned char link_mode
; /* mapping policy to operstate */
1342 unsigned char if_port
; /* Selectable AUI, TP,..*/
1343 unsigned char dma
; /* DMA channel */
1345 unsigned int mtu
; /* interface MTU value */
1346 unsigned short type
; /* interface hardware type */
1347 unsigned short hard_header_len
; /* hardware hdr length */
1349 /* extra head- and tailroom the hardware may need, but not in all cases
1350 * can this be guaranteed, especially tailroom. Some cases also use
1351 * LL_MAX_HEADER instead to allocate the skb.
1353 unsigned short needed_headroom
;
1354 unsigned short needed_tailroom
;
1356 /* Interface address info. */
1357 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1358 unsigned char addr_assign_type
; /* hw address assignment type */
1359 unsigned char addr_len
; /* hardware address length */
1360 unsigned short neigh_priv_len
;
1361 unsigned short dev_id
; /* Used to differentiate devices
1362 * that share the same link
1365 unsigned short dev_port
; /* Used to differentiate
1366 * devices that share the same
1369 spinlock_t addr_list_lock
;
1370 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1371 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1372 struct netdev_hw_addr_list dev_addrs
; /* list of device
1376 struct kset
*queues_kset
;
1380 unsigned int promiscuity
;
1381 unsigned int allmulti
;
1384 /* Protocol specific pointers */
1386 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1387 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1389 #if IS_ENABLED(CONFIG_NET_DSA)
1390 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1392 #if IS_ENABLED(CONFIG_TIPC)
1393 struct tipc_bearer __rcu
*tipc_ptr
; /* TIPC specific data */
1395 void *atalk_ptr
; /* AppleTalk link */
1396 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1397 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1398 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1399 void *ax25_ptr
; /* AX.25 specific data */
1400 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1401 assign before registering */
1404 * Cache lines mostly used on receive path (including eth_type_trans())
1406 unsigned long last_rx
; /* Time of last Rx */
1408 /* Interface address info used in eth_type_trans() */
1409 unsigned char *dev_addr
; /* hw address, (before bcast
1410 because most packets are
1415 struct netdev_rx_queue
*_rx
;
1417 /* Number of RX queues allocated at register_netdev() time */
1418 unsigned int num_rx_queues
;
1420 /* Number of RX queues currently active in device */
1421 unsigned int real_num_rx_queues
;
1425 rx_handler_func_t __rcu
*rx_handler
;
1426 void __rcu
*rx_handler_data
;
1428 struct netdev_queue __rcu
*ingress_queue
;
1429 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1433 * Cache lines mostly used on transmit path
1435 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1437 /* Number of TX queues allocated at alloc_netdev_mq() time */
1438 unsigned int num_tx_queues
;
1440 /* Number of TX queues currently active in device */
1441 unsigned int real_num_tx_queues
;
1443 /* root qdisc from userspace point of view */
1444 struct Qdisc
*qdisc
;
1446 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1447 spinlock_t tx_global_lock
;
1450 struct xps_dev_maps __rcu
*xps_maps
;
1452 #ifdef CONFIG_RFS_ACCEL
1453 /* CPU reverse-mapping for RX completion interrupts, indexed
1454 * by RX queue number. Assigned by driver. This must only be
1455 * set if the ndo_rx_flow_steer operation is defined. */
1456 struct cpu_rmap
*rx_cpu_rmap
;
1459 /* These may be needed for future network-power-down code. */
1462 * trans_start here is expensive for high speed devices on SMP,
1463 * please use netdev_queue->trans_start instead.
1465 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1467 int watchdog_timeo
; /* used by dev_watchdog() */
1468 struct timer_list watchdog_timer
;
1470 /* Number of references to this device */
1471 int __percpu
*pcpu_refcnt
;
1473 /* delayed register/unregister */
1474 struct list_head todo_list
;
1475 /* device index hash chain */
1476 struct hlist_node index_hlist
;
1478 struct list_head link_watch_list
;
1480 /* register/unregister state machine */
1481 enum { NETREG_UNINITIALIZED
=0,
1482 NETREG_REGISTERED
, /* completed register_netdevice */
1483 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1484 NETREG_UNREGISTERED
, /* completed unregister todo */
1485 NETREG_RELEASED
, /* called free_netdev */
1486 NETREG_DUMMY
, /* dummy device for NAPI poll */
1489 bool dismantle
; /* device is going do be freed */
1492 RTNL_LINK_INITIALIZED
,
1493 RTNL_LINK_INITIALIZING
,
1494 } rtnl_link_state
:16;
1496 /* Called from unregister, can be used to call free_netdev */
1497 void (*destructor
)(struct net_device
*dev
);
1499 #ifdef CONFIG_NETPOLL
1500 struct netpoll_info __rcu
*npinfo
;
1503 #ifdef CONFIG_NET_NS
1504 /* Network namespace this network device is inside */
1508 /* mid-layer private */
1511 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1512 struct pcpu_sw_netstats __percpu
*tstats
;
1513 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1514 struct pcpu_vstats __percpu
*vstats
; /* veth stats */
1517 struct garp_port __rcu
*garp_port
;
1519 struct mrp_port __rcu
*mrp_port
;
1521 /* class/net/name entry */
1523 /* space for optional device, statistics, and wireless sysfs groups */
1524 const struct attribute_group
*sysfs_groups
[4];
1525 /* space for optional per-rx queue attributes */
1526 const struct attribute_group
*sysfs_rx_queue_group
;
1528 /* rtnetlink link ops */
1529 const struct rtnl_link_ops
*rtnl_link_ops
;
1531 /* for setting kernel sock attribute on TCP connection setup */
1532 #define GSO_MAX_SIZE 65536
1533 unsigned int gso_max_size
;
1534 #define GSO_MAX_SEGS 65535
1538 /* Data Center Bridging netlink ops */
1539 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1542 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1543 u8 prio_tc_map
[TC_BITMASK
+ 1];
1545 #if IS_ENABLED(CONFIG_FCOE)
1546 /* max exchange id for FCoE LRO by ddp */
1547 unsigned int fcoe_ddp_xid
;
1549 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1550 struct netprio_map __rcu
*priomap
;
1552 /* phy device may attach itself for hardware timestamping */
1553 struct phy_device
*phydev
;
1555 struct lock_class_key
*qdisc_tx_busylock
;
1557 /* group the device belongs to */
1560 struct pm_qos_request pm_qos_req
;
1562 #define to_net_dev(d) container_of(d, struct net_device, dev)
1564 #define NETDEV_ALIGN 32
1567 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1569 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1573 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1575 if (tc
>= dev
->num_tc
)
1578 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1583 void netdev_reset_tc(struct net_device
*dev
)
1586 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1587 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1591 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1593 if (tc
>= dev
->num_tc
)
1596 dev
->tc_to_txq
[tc
].count
= count
;
1597 dev
->tc_to_txq
[tc
].offset
= offset
;
1602 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1604 if (num_tc
> TC_MAX_QUEUE
)
1607 dev
->num_tc
= num_tc
;
1612 int netdev_get_num_tc(struct net_device
*dev
)
1618 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1621 return &dev
->_tx
[index
];
1624 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1625 void (*f
)(struct net_device
*,
1626 struct netdev_queue
*,
1632 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1633 f(dev
, &dev
->_tx
[i
], arg
);
1636 struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1637 struct sk_buff
*skb
,
1641 * Net namespace inlines
1644 struct net
*dev_net(const struct net_device
*dev
)
1646 return read_pnet(&dev
->nd_net
);
1650 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1652 #ifdef CONFIG_NET_NS
1653 release_net(dev
->nd_net
);
1654 dev
->nd_net
= hold_net(net
);
1658 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1660 #ifdef CONFIG_NET_DSA_TAG_DSA
1661 if (dev
->dsa_ptr
!= NULL
)
1662 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1668 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1670 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1671 if (dev
->dsa_ptr
!= NULL
)
1672 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1679 * netdev_priv - access network device private data
1680 * @dev: network device
1682 * Get network device private data
1684 static inline void *netdev_priv(const struct net_device
*dev
)
1686 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1689 /* Set the sysfs physical device reference for the network logical device
1690 * if set prior to registration will cause a symlink during initialization.
1692 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1694 /* Set the sysfs device type for the network logical device to allow
1695 * fine-grained identification of different network device types. For
1696 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1698 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1700 /* Default NAPI poll() weight
1701 * Device drivers are strongly advised to not use bigger value
1703 #define NAPI_POLL_WEIGHT 64
1706 * netif_napi_add - initialize a napi context
1707 * @dev: network device
1708 * @napi: napi context
1709 * @poll: polling function
1710 * @weight: default weight
1712 * netif_napi_add() must be used to initialize a napi context prior to calling
1713 * *any* of the other napi related functions.
1715 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1716 int (*poll
)(struct napi_struct
*, int), int weight
);
1719 * netif_napi_del - remove a napi context
1720 * @napi: napi context
1722 * netif_napi_del() removes a napi context from the network device napi list
1724 void netif_napi_del(struct napi_struct
*napi
);
1726 struct napi_gro_cb
{
1727 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1730 /* Length of frag0. */
1731 unsigned int frag0_len
;
1733 /* This indicates where we are processing relative to skb->data. */
1736 /* This is non-zero if the packet cannot be merged with the new skb. */
1739 /* Save the IP ID here and check when we get to the transport layer */
1742 /* Number of segments aggregated. */
1745 /* This is non-zero if the packet may be of the same flow. */
1750 #define NAPI_GRO_FREE 1
1751 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1753 /* jiffies when first packet was created/queued */
1756 /* Used in ipv6_gro_receive() */
1759 /* Used in udp_gro_receive */
1762 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
1765 /* used in skb_gro_receive() slow path */
1766 struct sk_buff
*last
;
1769 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1771 struct packet_type
{
1772 __be16 type
; /* This is really htons(ether_type). */
1773 struct net_device
*dev
; /* NULL is wildcarded here */
1774 int (*func
) (struct sk_buff
*,
1775 struct net_device
*,
1776 struct packet_type
*,
1777 struct net_device
*);
1778 bool (*id_match
)(struct packet_type
*ptype
,
1780 void *af_packet_priv
;
1781 struct list_head list
;
1784 struct offload_callbacks
{
1785 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1786 netdev_features_t features
);
1787 int (*gso_send_check
)(struct sk_buff
*skb
);
1788 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1789 struct sk_buff
*skb
);
1790 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
1793 struct packet_offload
{
1794 __be16 type
; /* This is really htons(ether_type). */
1795 struct offload_callbacks callbacks
;
1796 struct list_head list
;
1799 struct udp_offload
{
1801 struct offload_callbacks callbacks
;
1804 /* often modified stats are per cpu, other are shared (netdev->stats) */
1805 struct pcpu_sw_netstats
{
1810 struct u64_stats_sync syncp
;
1813 #define netdev_alloc_pcpu_stats(type) \
1815 typeof(type) *pcpu_stats = alloc_percpu(type); \
1818 for_each_possible_cpu(i) { \
1819 typeof(type) *stat; \
1820 stat = per_cpu_ptr(pcpu_stats, i); \
1821 u64_stats_init(&stat->syncp); \
1827 #include <linux/notifier.h>
1829 /* netdevice notifier chain. Please remember to update the rtnetlink
1830 * notification exclusion list in rtnetlink_event() when adding new
1833 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1834 #define NETDEV_DOWN 0x0002
1835 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1836 detected a hardware crash and restarted
1837 - we can use this eg to kick tcp sessions
1839 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1840 #define NETDEV_REGISTER 0x0005
1841 #define NETDEV_UNREGISTER 0x0006
1842 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
1843 #define NETDEV_CHANGEADDR 0x0008
1844 #define NETDEV_GOING_DOWN 0x0009
1845 #define NETDEV_CHANGENAME 0x000A
1846 #define NETDEV_FEAT_CHANGE 0x000B
1847 #define NETDEV_BONDING_FAILOVER 0x000C
1848 #define NETDEV_PRE_UP 0x000D
1849 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1850 #define NETDEV_POST_TYPE_CHANGE 0x000F
1851 #define NETDEV_POST_INIT 0x0010
1852 #define NETDEV_UNREGISTER_FINAL 0x0011
1853 #define NETDEV_RELEASE 0x0012
1854 #define NETDEV_NOTIFY_PEERS 0x0013
1855 #define NETDEV_JOIN 0x0014
1856 #define NETDEV_CHANGEUPPER 0x0015
1857 #define NETDEV_RESEND_IGMP 0x0016
1858 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
1860 int register_netdevice_notifier(struct notifier_block
*nb
);
1861 int unregister_netdevice_notifier(struct notifier_block
*nb
);
1863 struct netdev_notifier_info
{
1864 struct net_device
*dev
;
1867 struct netdev_notifier_change_info
{
1868 struct netdev_notifier_info info
; /* must be first */
1869 unsigned int flags_changed
;
1872 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
1873 struct net_device
*dev
)
1878 static inline struct net_device
*
1879 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
1884 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1887 extern rwlock_t dev_base_lock
; /* Device list lock */
1889 #define for_each_netdev(net, d) \
1890 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1891 #define for_each_netdev_reverse(net, d) \
1892 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1893 #define for_each_netdev_rcu(net, d) \
1894 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1895 #define for_each_netdev_safe(net, d, n) \
1896 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1897 #define for_each_netdev_continue(net, d) \
1898 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1899 #define for_each_netdev_continue_rcu(net, d) \
1900 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1901 #define for_each_netdev_in_bond_rcu(bond, slave) \
1902 for_each_netdev_rcu(&init_net, slave) \
1903 if (netdev_master_upper_dev_get_rcu(slave) == bond)
1904 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1906 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1908 struct list_head
*lh
;
1912 lh
= dev
->dev_list
.next
;
1913 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1916 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1918 struct list_head
*lh
;
1922 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1923 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1926 static inline struct net_device
*first_net_device(struct net
*net
)
1928 return list_empty(&net
->dev_base_head
) ? NULL
:
1929 net_device_entry(net
->dev_base_head
.next
);
1932 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1934 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1936 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1939 int netdev_boot_setup_check(struct net_device
*dev
);
1940 unsigned long netdev_boot_base(const char *prefix
, int unit
);
1941 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1942 const char *hwaddr
);
1943 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1944 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1945 void dev_add_pack(struct packet_type
*pt
);
1946 void dev_remove_pack(struct packet_type
*pt
);
1947 void __dev_remove_pack(struct packet_type
*pt
);
1948 void dev_add_offload(struct packet_offload
*po
);
1949 void dev_remove_offload(struct packet_offload
*po
);
1951 struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1952 unsigned short mask
);
1953 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1954 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1955 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1956 int dev_alloc_name(struct net_device
*dev
, const char *name
);
1957 int dev_open(struct net_device
*dev
);
1958 int dev_close(struct net_device
*dev
);
1959 void dev_disable_lro(struct net_device
*dev
);
1960 int dev_loopback_xmit(struct sk_buff
*newskb
);
1961 int dev_queue_xmit(struct sk_buff
*skb
);
1962 int dev_queue_xmit_accel(struct sk_buff
*skb
, void *accel_priv
);
1963 int register_netdevice(struct net_device
*dev
);
1964 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
1965 void unregister_netdevice_many(struct list_head
*head
);
1966 static inline void unregister_netdevice(struct net_device
*dev
)
1968 unregister_netdevice_queue(dev
, NULL
);
1971 int netdev_refcnt_read(const struct net_device
*dev
);
1972 void free_netdev(struct net_device
*dev
);
1973 void netdev_freemem(struct net_device
*dev
);
1974 void synchronize_net(void);
1975 int init_dummy_netdev(struct net_device
*dev
);
1977 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1978 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1979 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1980 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
1981 int dev_restart(struct net_device
*dev
);
1982 #ifdef CONFIG_NETPOLL_TRAP
1983 int netpoll_trap(void);
1985 int skb_gro_receive(struct sk_buff
**head
, struct sk_buff
*skb
);
1987 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1989 return NAPI_GRO_CB(skb
)->data_offset
;
1992 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1994 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1997 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1999 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2002 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2003 unsigned int offset
)
2005 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2008 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2010 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2013 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2014 unsigned int offset
)
2016 if (!pskb_may_pull(skb
, hlen
))
2019 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2020 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2021 return skb
->data
+ offset
;
2024 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
2026 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
2029 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2031 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2032 skb_network_offset(skb
);
2035 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2036 const void *start
, unsigned int len
)
2038 if (skb
->ip_summed
== CHECKSUM_COMPLETE
)
2039 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2040 csum_partial(start
, len
, 0));
2043 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2044 unsigned short type
,
2045 const void *daddr
, const void *saddr
,
2048 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2051 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2054 static inline int dev_parse_header(const struct sk_buff
*skb
,
2055 unsigned char *haddr
)
2057 const struct net_device
*dev
= skb
->dev
;
2059 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2061 return dev
->header_ops
->parse(skb
, haddr
);
2064 static inline int dev_rebuild_header(struct sk_buff
*skb
)
2066 const struct net_device
*dev
= skb
->dev
;
2068 if (!dev
->header_ops
|| !dev
->header_ops
->rebuild
)
2070 return dev
->header_ops
->rebuild(skb
);
2073 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
2074 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2075 static inline int unregister_gifconf(unsigned int family
)
2077 return register_gifconf(family
, NULL
);
2080 #ifdef CONFIG_NET_FLOW_LIMIT
2081 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2082 struct sd_flow_limit
{
2084 unsigned int num_buckets
;
2085 unsigned int history_head
;
2086 u16 history
[FLOW_LIMIT_HISTORY
];
2090 extern int netdev_flow_limit_table_len
;
2091 #endif /* CONFIG_NET_FLOW_LIMIT */
2094 * Incoming packets are placed on per-cpu queues
2096 struct softnet_data
{
2097 struct Qdisc
*output_queue
;
2098 struct Qdisc
**output_queue_tailp
;
2099 struct list_head poll_list
;
2100 struct sk_buff
*completion_queue
;
2101 struct sk_buff_head process_queue
;
2104 unsigned int processed
;
2105 unsigned int time_squeeze
;
2106 unsigned int cpu_collision
;
2107 unsigned int received_rps
;
2110 struct softnet_data
*rps_ipi_list
;
2112 /* Elements below can be accessed between CPUs for RPS */
2113 struct call_single_data csd ____cacheline_aligned_in_smp
;
2114 struct softnet_data
*rps_ipi_next
;
2116 unsigned int input_queue_head
;
2117 unsigned int input_queue_tail
;
2119 unsigned int dropped
;
2120 struct sk_buff_head input_pkt_queue
;
2121 struct napi_struct backlog
;
2123 #ifdef CONFIG_NET_FLOW_LIMIT
2124 struct sd_flow_limit __rcu
*flow_limit
;
2128 static inline void input_queue_head_incr(struct softnet_data
*sd
)
2131 sd
->input_queue_head
++;
2135 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
2136 unsigned int *qtail
)
2139 *qtail
= ++sd
->input_queue_tail
;
2143 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
2145 void __netif_schedule(struct Qdisc
*q
);
2147 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
2149 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
2150 __netif_schedule(txq
->qdisc
);
2153 static inline void netif_tx_schedule_all(struct net_device
*dev
)
2157 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2158 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
2161 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
2163 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2167 * netif_start_queue - allow transmit
2168 * @dev: network device
2170 * Allow upper layers to call the device hard_start_xmit routine.
2172 static inline void netif_start_queue(struct net_device
*dev
)
2174 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
2177 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
2181 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2182 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2183 netif_tx_start_queue(txq
);
2187 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
2189 #ifdef CONFIG_NETPOLL_TRAP
2190 if (netpoll_trap()) {
2191 netif_tx_start_queue(dev_queue
);
2195 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
2196 __netif_schedule(dev_queue
->qdisc
);
2200 * netif_wake_queue - restart transmit
2201 * @dev: network device
2203 * Allow upper layers to call the device hard_start_xmit routine.
2204 * Used for flow control when transmit resources are available.
2206 static inline void netif_wake_queue(struct net_device
*dev
)
2208 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
2211 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
2215 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2216 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2217 netif_tx_wake_queue(txq
);
2221 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
2223 if (WARN_ON(!dev_queue
)) {
2224 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
2227 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2231 * netif_stop_queue - stop transmitted packets
2232 * @dev: network device
2234 * Stop upper layers calling the device hard_start_xmit routine.
2235 * Used for flow control when transmit resources are unavailable.
2237 static inline void netif_stop_queue(struct net_device
*dev
)
2239 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2242 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
2246 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2247 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2248 netif_tx_stop_queue(txq
);
2252 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2254 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2258 * netif_queue_stopped - test if transmit queue is flowblocked
2259 * @dev: network device
2261 * Test if transmit queue on device is currently unable to send.
2263 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2265 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2268 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2270 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2273 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2275 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2278 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2282 dql_queued(&dev_queue
->dql
, bytes
);
2284 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2287 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2290 * The XOFF flag must be set before checking the dql_avail below,
2291 * because in netdev_tx_completed_queue we update the dql_completed
2292 * before checking the XOFF flag.
2296 /* check again in case another CPU has just made room avail */
2297 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2298 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2303 * netdev_sent_queue - report the number of bytes queued to hardware
2304 * @dev: network device
2305 * @bytes: number of bytes queued to the hardware device queue
2307 * Report the number of bytes queued for sending/completion to the network
2308 * device hardware queue. @bytes should be a good approximation and should
2309 * exactly match netdev_completed_queue() @bytes
2311 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2313 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2316 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2317 unsigned int pkts
, unsigned int bytes
)
2320 if (unlikely(!bytes
))
2323 dql_completed(&dev_queue
->dql
, bytes
);
2326 * Without the memory barrier there is a small possiblity that
2327 * netdev_tx_sent_queue will miss the update and cause the queue to
2328 * be stopped forever
2332 if (dql_avail(&dev_queue
->dql
) < 0)
2335 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2336 netif_schedule_queue(dev_queue
);
2341 * netdev_completed_queue - report bytes and packets completed by device
2342 * @dev: network device
2343 * @pkts: actual number of packets sent over the medium
2344 * @bytes: actual number of bytes sent over the medium
2346 * Report the number of bytes and packets transmitted by the network device
2347 * hardware queue over the physical medium, @bytes must exactly match the
2348 * @bytes amount passed to netdev_sent_queue()
2350 static inline void netdev_completed_queue(struct net_device
*dev
,
2351 unsigned int pkts
, unsigned int bytes
)
2353 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2356 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2359 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2365 * netdev_reset_queue - reset the packets and bytes count of a network device
2366 * @dev_queue: network device
2368 * Reset the bytes and packet count of a network device and clear the
2369 * software flow control OFF bit for this network device
2371 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2373 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2377 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2378 * @dev: network device
2379 * @queue_index: given tx queue index
2381 * Returns 0 if given tx queue index >= number of device tx queues,
2382 * otherwise returns the originally passed tx queue index.
2384 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
2386 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
2387 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2388 dev
->name
, queue_index
,
2389 dev
->real_num_tx_queues
);
2397 * netif_running - test if up
2398 * @dev: network device
2400 * Test if the device has been brought up.
2402 static inline bool netif_running(const struct net_device
*dev
)
2404 return test_bit(__LINK_STATE_START
, &dev
->state
);
2408 * Routines to manage the subqueues on a device. We only need start
2409 * stop, and a check if it's stopped. All other device management is
2410 * done at the overall netdevice level.
2411 * Also test the device if we're multiqueue.
2415 * netif_start_subqueue - allow sending packets on subqueue
2416 * @dev: network device
2417 * @queue_index: sub queue index
2419 * Start individual transmit queue of a device with multiple transmit queues.
2421 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2423 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2425 netif_tx_start_queue(txq
);
2429 * netif_stop_subqueue - stop sending packets on subqueue
2430 * @dev: network device
2431 * @queue_index: sub queue index
2433 * Stop individual transmit queue of a device with multiple transmit queues.
2435 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2437 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2438 #ifdef CONFIG_NETPOLL_TRAP
2442 netif_tx_stop_queue(txq
);
2446 * netif_subqueue_stopped - test status of subqueue
2447 * @dev: network device
2448 * @queue_index: sub queue index
2450 * Check individual transmit queue of a device with multiple transmit queues.
2452 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2455 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2457 return netif_tx_queue_stopped(txq
);
2460 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2461 struct sk_buff
*skb
)
2463 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2467 * netif_wake_subqueue - allow sending packets on subqueue
2468 * @dev: network device
2469 * @queue_index: sub queue index
2471 * Resume individual transmit queue of a device with multiple transmit queues.
2473 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2475 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2476 #ifdef CONFIG_NETPOLL_TRAP
2480 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2481 __netif_schedule(txq
->qdisc
);
2485 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
2488 static inline int netif_set_xps_queue(struct net_device
*dev
,
2489 const struct cpumask
*mask
,
2497 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2498 * as a distribution range limit for the returned value.
2500 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2501 const struct sk_buff
*skb
)
2503 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2507 * netif_is_multiqueue - test if device has multiple transmit queues
2508 * @dev: network device
2510 * Check if device has multiple transmit queues
2512 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2514 return dev
->num_tx_queues
> 1;
2517 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
2520 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
2522 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2529 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2530 const struct net_device
*from_dev
)
2534 err
= netif_set_real_num_tx_queues(to_dev
,
2535 from_dev
->real_num_tx_queues
);
2539 return netif_set_real_num_rx_queues(to_dev
,
2540 from_dev
->real_num_rx_queues
);
2547 static inline unsigned int get_netdev_rx_queue_index(
2548 struct netdev_rx_queue
*queue
)
2550 struct net_device
*dev
= queue
->dev
;
2551 int index
= queue
- dev
->_rx
;
2553 BUG_ON(index
>= dev
->num_rx_queues
);
2558 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2559 int netif_get_num_default_rss_queues(void);
2561 enum skb_free_reason
{
2562 SKB_REASON_CONSUMED
,
2566 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
2567 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
2570 * It is not allowed to call kfree_skb() or consume_skb() from hardware
2571 * interrupt context or with hardware interrupts being disabled.
2572 * (in_irq() || irqs_disabled())
2574 * We provide four helpers that can be used in following contexts :
2576 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
2577 * replacing kfree_skb(skb)
2579 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
2580 * Typically used in place of consume_skb(skb) in TX completion path
2582 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
2583 * replacing kfree_skb(skb)
2585 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
2586 * and consumed a packet. Used in place of consume_skb(skb)
2588 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
2590 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
2593 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
2595 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
2598 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
2600 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
2603 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
2605 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
2608 int netif_rx(struct sk_buff
*skb
);
2609 int netif_rx_ni(struct sk_buff
*skb
);
2610 int netif_receive_skb(struct sk_buff
*skb
);
2611 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
2612 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2613 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
2614 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2615 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
2616 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
2618 static inline void napi_free_frags(struct napi_struct
*napi
)
2620 kfree_skb(napi
->skb
);
2624 int netdev_rx_handler_register(struct net_device
*dev
,
2625 rx_handler_func_t
*rx_handler
,
2626 void *rx_handler_data
);
2627 void netdev_rx_handler_unregister(struct net_device
*dev
);
2629 bool dev_valid_name(const char *name
);
2630 int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2631 int dev_ethtool(struct net
*net
, struct ifreq
*);
2632 unsigned int dev_get_flags(const struct net_device
*);
2633 int __dev_change_flags(struct net_device
*, unsigned int flags
);
2634 int dev_change_flags(struct net_device
*, unsigned int);
2635 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
2636 unsigned int gchanges
);
2637 int dev_change_name(struct net_device
*, const char *);
2638 int dev_set_alias(struct net_device
*, const char *, size_t);
2639 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
2640 int dev_set_mtu(struct net_device
*, int);
2641 void dev_set_group(struct net_device
*, int);
2642 int dev_set_mac_address(struct net_device
*, struct sockaddr
*);
2643 int dev_change_carrier(struct net_device
*, bool new_carrier
);
2644 int dev_get_phys_port_id(struct net_device
*dev
,
2645 struct netdev_phys_port_id
*ppid
);
2646 int dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
2647 struct netdev_queue
*txq
);
2648 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
2650 extern int netdev_budget
;
2652 /* Called by rtnetlink.c:rtnl_unlock() */
2653 void netdev_run_todo(void);
2656 * dev_put - release reference to device
2657 * @dev: network device
2659 * Release reference to device to allow it to be freed.
2661 static inline void dev_put(struct net_device
*dev
)
2663 this_cpu_dec(*dev
->pcpu_refcnt
);
2667 * dev_hold - get reference to device
2668 * @dev: network device
2670 * Hold reference to device to keep it from being freed.
2672 static inline void dev_hold(struct net_device
*dev
)
2674 this_cpu_inc(*dev
->pcpu_refcnt
);
2677 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2678 * and _off may be called from IRQ context, but it is caller
2679 * who is responsible for serialization of these calls.
2681 * The name carrier is inappropriate, these functions should really be
2682 * called netif_lowerlayer_*() because they represent the state of any
2683 * kind of lower layer not just hardware media.
2686 void linkwatch_init_dev(struct net_device
*dev
);
2687 void linkwatch_fire_event(struct net_device
*dev
);
2688 void linkwatch_forget_dev(struct net_device
*dev
);
2691 * netif_carrier_ok - test if carrier present
2692 * @dev: network device
2694 * Check if carrier is present on device
2696 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2698 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2701 unsigned long dev_trans_start(struct net_device
*dev
);
2703 void __netdev_watchdog_up(struct net_device
*dev
);
2705 void netif_carrier_on(struct net_device
*dev
);
2707 void netif_carrier_off(struct net_device
*dev
);
2710 * netif_dormant_on - mark device as dormant.
2711 * @dev: network device
2713 * Mark device as dormant (as per RFC2863).
2715 * The dormant state indicates that the relevant interface is not
2716 * actually in a condition to pass packets (i.e., it is not 'up') but is
2717 * in a "pending" state, waiting for some external event. For "on-
2718 * demand" interfaces, this new state identifies the situation where the
2719 * interface is waiting for events to place it in the up state.
2722 static inline void netif_dormant_on(struct net_device
*dev
)
2724 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2725 linkwatch_fire_event(dev
);
2729 * netif_dormant_off - set device as not dormant.
2730 * @dev: network device
2732 * Device is not in dormant state.
2734 static inline void netif_dormant_off(struct net_device
*dev
)
2736 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2737 linkwatch_fire_event(dev
);
2741 * netif_dormant - test if carrier present
2742 * @dev: network device
2744 * Check if carrier is present on device
2746 static inline bool netif_dormant(const struct net_device
*dev
)
2748 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2753 * netif_oper_up - test if device is operational
2754 * @dev: network device
2756 * Check if carrier is operational
2758 static inline bool netif_oper_up(const struct net_device
*dev
)
2760 return (dev
->operstate
== IF_OPER_UP
||
2761 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2765 * netif_device_present - is device available or removed
2766 * @dev: network device
2768 * Check if device has not been removed from system.
2770 static inline bool netif_device_present(struct net_device
*dev
)
2772 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2775 void netif_device_detach(struct net_device
*dev
);
2777 void netif_device_attach(struct net_device
*dev
);
2780 * Network interface message level settings
2784 NETIF_MSG_DRV
= 0x0001,
2785 NETIF_MSG_PROBE
= 0x0002,
2786 NETIF_MSG_LINK
= 0x0004,
2787 NETIF_MSG_TIMER
= 0x0008,
2788 NETIF_MSG_IFDOWN
= 0x0010,
2789 NETIF_MSG_IFUP
= 0x0020,
2790 NETIF_MSG_RX_ERR
= 0x0040,
2791 NETIF_MSG_TX_ERR
= 0x0080,
2792 NETIF_MSG_TX_QUEUED
= 0x0100,
2793 NETIF_MSG_INTR
= 0x0200,
2794 NETIF_MSG_TX_DONE
= 0x0400,
2795 NETIF_MSG_RX_STATUS
= 0x0800,
2796 NETIF_MSG_PKTDATA
= 0x1000,
2797 NETIF_MSG_HW
= 0x2000,
2798 NETIF_MSG_WOL
= 0x4000,
2801 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2802 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2803 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2804 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2805 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2806 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2807 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2808 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2809 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2810 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2811 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2812 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2813 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2814 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2815 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2817 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2820 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2821 return default_msg_enable_bits
;
2822 if (debug_value
== 0) /* no output */
2824 /* set low N bits */
2825 return (1 << debug_value
) - 1;
2828 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2830 spin_lock(&txq
->_xmit_lock
);
2831 txq
->xmit_lock_owner
= cpu
;
2834 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2836 spin_lock_bh(&txq
->_xmit_lock
);
2837 txq
->xmit_lock_owner
= smp_processor_id();
2840 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2842 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2844 txq
->xmit_lock_owner
= smp_processor_id();
2848 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2850 txq
->xmit_lock_owner
= -1;
2851 spin_unlock(&txq
->_xmit_lock
);
2854 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2856 txq
->xmit_lock_owner
= -1;
2857 spin_unlock_bh(&txq
->_xmit_lock
);
2860 static inline void txq_trans_update(struct netdev_queue
*txq
)
2862 if (txq
->xmit_lock_owner
!= -1)
2863 txq
->trans_start
= jiffies
;
2867 * netif_tx_lock - grab network device transmit lock
2868 * @dev: network device
2870 * Get network device transmit lock
2872 static inline void netif_tx_lock(struct net_device
*dev
)
2877 spin_lock(&dev
->tx_global_lock
);
2878 cpu
= smp_processor_id();
2879 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2880 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2882 /* We are the only thread of execution doing a
2883 * freeze, but we have to grab the _xmit_lock in
2884 * order to synchronize with threads which are in
2885 * the ->hard_start_xmit() handler and already
2886 * checked the frozen bit.
2888 __netif_tx_lock(txq
, cpu
);
2889 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2890 __netif_tx_unlock(txq
);
2894 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2900 static inline void netif_tx_unlock(struct net_device
*dev
)
2904 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2905 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2907 /* No need to grab the _xmit_lock here. If the
2908 * queue is not stopped for another reason, we
2911 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2912 netif_schedule_queue(txq
);
2914 spin_unlock(&dev
->tx_global_lock
);
2917 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2919 netif_tx_unlock(dev
);
2923 #define HARD_TX_LOCK(dev, txq, cpu) { \
2924 if ((dev->features & NETIF_F_LLTX) == 0) { \
2925 __netif_tx_lock(txq, cpu); \
2929 #define HARD_TX_UNLOCK(dev, txq) { \
2930 if ((dev->features & NETIF_F_LLTX) == 0) { \
2931 __netif_tx_unlock(txq); \
2935 static inline void netif_tx_disable(struct net_device
*dev
)
2941 cpu
= smp_processor_id();
2942 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2943 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2945 __netif_tx_lock(txq
, cpu
);
2946 netif_tx_stop_queue(txq
);
2947 __netif_tx_unlock(txq
);
2952 static inline void netif_addr_lock(struct net_device
*dev
)
2954 spin_lock(&dev
->addr_list_lock
);
2957 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2959 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2962 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2964 spin_lock_bh(&dev
->addr_list_lock
);
2967 static inline void netif_addr_unlock(struct net_device
*dev
)
2969 spin_unlock(&dev
->addr_list_lock
);
2972 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2974 spin_unlock_bh(&dev
->addr_list_lock
);
2978 * dev_addrs walker. Should be used only for read access. Call with
2979 * rcu_read_lock held.
2981 #define for_each_dev_addr(dev, ha) \
2982 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2984 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2986 void ether_setup(struct net_device
*dev
);
2988 /* Support for loadable net-drivers */
2989 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2990 void (*setup
)(struct net_device
*),
2991 unsigned int txqs
, unsigned int rxqs
);
2992 #define alloc_netdev(sizeof_priv, name, setup) \
2993 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2995 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2996 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2998 int register_netdev(struct net_device
*dev
);
2999 void unregister_netdev(struct net_device
*dev
);
3001 /* General hardware address lists handling functions */
3002 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
3003 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3004 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
3005 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3006 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
3008 /* Functions used for device addresses handling */
3009 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
3010 unsigned char addr_type
);
3011 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
3012 unsigned char addr_type
);
3013 void dev_addr_flush(struct net_device
*dev
);
3014 int dev_addr_init(struct net_device
*dev
);
3016 /* Functions used for unicast addresses handling */
3017 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
3018 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3019 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
3020 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
3021 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3022 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
3023 void dev_uc_flush(struct net_device
*dev
);
3024 void dev_uc_init(struct net_device
*dev
);
3026 /* Functions used for multicast addresses handling */
3027 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
3028 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
3029 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3030 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
3031 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
3032 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
3033 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3034 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
3035 void dev_mc_flush(struct net_device
*dev
);
3036 void dev_mc_init(struct net_device
*dev
);
3038 /* Functions used for secondary unicast and multicast support */
3039 void dev_set_rx_mode(struct net_device
*dev
);
3040 void __dev_set_rx_mode(struct net_device
*dev
);
3041 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
3042 int dev_set_allmulti(struct net_device
*dev
, int inc
);
3043 void netdev_state_change(struct net_device
*dev
);
3044 void netdev_notify_peers(struct net_device
*dev
);
3045 void netdev_features_change(struct net_device
*dev
);
3046 /* Load a device via the kmod */
3047 void dev_load(struct net
*net
, const char *name
);
3048 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
3049 struct rtnl_link_stats64
*storage
);
3050 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
3051 const struct net_device_stats
*netdev_stats
);
3053 extern int netdev_max_backlog
;
3054 extern int netdev_tstamp_prequeue
;
3055 extern int weight_p
;
3056 extern int bpf_jit_enable
;
3058 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
3059 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
3060 struct list_head
**iter
);
3062 /* iterate through upper list, must be called under RCU read lock */
3063 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3064 for (iter = &(dev)->all_adj_list.upper, \
3065 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3067 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3069 void *netdev_lower_get_next_private(struct net_device
*dev
,
3070 struct list_head
**iter
);
3071 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
3072 struct list_head
**iter
);
3074 #define netdev_for_each_lower_private(dev, priv, iter) \
3075 for (iter = (dev)->adj_list.lower.next, \
3076 priv = netdev_lower_get_next_private(dev, &(iter)); \
3078 priv = netdev_lower_get_next_private(dev, &(iter)))
3080 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3081 for (iter = &(dev)->adj_list.lower, \
3082 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3084 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3086 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
3087 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
3088 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
3089 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
3090 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
);
3091 int netdev_master_upper_dev_link(struct net_device
*dev
,
3092 struct net_device
*upper_dev
);
3093 int netdev_master_upper_dev_link_private(struct net_device
*dev
,
3094 struct net_device
*upper_dev
,
3096 void netdev_upper_dev_unlink(struct net_device
*dev
,
3097 struct net_device
*upper_dev
);
3098 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
3099 void *netdev_lower_dev_get_private(struct net_device
*dev
,
3100 struct net_device
*lower_dev
);
3101 int skb_checksum_help(struct sk_buff
*skb
);
3102 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
3103 netdev_features_t features
, bool tx_path
);
3104 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
3105 netdev_features_t features
);
3108 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
3110 return __skb_gso_segment(skb
, features
, true);
3112 __be16
skb_network_protocol(struct sk_buff
*skb
);
3114 static inline bool can_checksum_protocol(netdev_features_t features
,
3117 return ((features
& NETIF_F_GEN_CSUM
) ||
3118 ((features
& NETIF_F_V4_CSUM
) &&
3119 protocol
== htons(ETH_P_IP
)) ||
3120 ((features
& NETIF_F_V6_CSUM
) &&
3121 protocol
== htons(ETH_P_IPV6
)) ||
3122 ((features
& NETIF_F_FCOE_CRC
) &&
3123 protocol
== htons(ETH_P_FCOE
)));
3127 void netdev_rx_csum_fault(struct net_device
*dev
);
3129 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
3133 /* rx skb timestamps */
3134 void net_enable_timestamp(void);
3135 void net_disable_timestamp(void);
3137 #ifdef CONFIG_PROC_FS
3138 int __init
dev_proc_init(void);
3140 #define dev_proc_init() 0
3143 int netdev_class_create_file_ns(struct class_attribute
*class_attr
,
3145 void netdev_class_remove_file_ns(struct class_attribute
*class_attr
,
3148 static inline int netdev_class_create_file(struct class_attribute
*class_attr
)
3150 return netdev_class_create_file_ns(class_attr
, NULL
);
3153 static inline void netdev_class_remove_file(struct class_attribute
*class_attr
)
3155 netdev_class_remove_file_ns(class_attr
, NULL
);
3158 extern struct kobj_ns_type_operations net_ns_type_operations
;
3160 const char *netdev_drivername(const struct net_device
*dev
);
3162 void linkwatch_run_queue(void);
3164 static inline netdev_features_t
netdev_get_wanted_features(
3165 struct net_device
*dev
)
3167 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
3169 netdev_features_t
netdev_increment_features(netdev_features_t all
,
3170 netdev_features_t one
, netdev_features_t mask
);
3172 /* Allow TSO being used on stacked device :
3173 * Performing the GSO segmentation before last device
3174 * is a performance improvement.
3176 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
3177 netdev_features_t mask
)
3179 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
3182 int __netdev_update_features(struct net_device
*dev
);
3183 void netdev_update_features(struct net_device
*dev
);
3184 void netdev_change_features(struct net_device
*dev
);
3186 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
3187 struct net_device
*dev
);
3189 netdev_features_t
netif_skb_dev_features(struct sk_buff
*skb
,
3190 const struct net_device
*dev
);
3191 static inline netdev_features_t
netif_skb_features(struct sk_buff
*skb
)
3193 return netif_skb_dev_features(skb
, skb
->dev
);
3196 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
3198 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
3200 /* check flags correspondence */
3201 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
3202 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
3203 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
3204 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
3205 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
3206 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
3208 return (features
& feature
) == feature
;
3211 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
3213 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
3214 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
3217 static inline bool netif_needs_gso(struct sk_buff
*skb
,
3218 netdev_features_t features
)
3220 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
3221 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
3222 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
3225 static inline void netif_set_gso_max_size(struct net_device
*dev
,
3228 dev
->gso_max_size
= size
;
3231 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
3232 int pulled_hlen
, u16 mac_offset
,
3235 skb
->protocol
= protocol
;
3236 skb
->encapsulation
= 1;
3237 skb_push(skb
, pulled_hlen
);
3238 skb_reset_transport_header(skb
);
3239 skb
->mac_header
= mac_offset
;
3240 skb
->network_header
= skb
->mac_header
+ mac_len
;
3241 skb
->mac_len
= mac_len
;
3244 static inline bool netif_is_macvlan(struct net_device
*dev
)
3246 return dev
->priv_flags
& IFF_MACVLAN
;
3249 static inline bool netif_is_bond_master(struct net_device
*dev
)
3251 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
3254 static inline bool netif_is_bond_slave(struct net_device
*dev
)
3256 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
3259 static inline bool netif_supports_nofcs(struct net_device
*dev
)
3261 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
3264 extern struct pernet_operations __net_initdata loopback_net_ops
;
3266 /* Logging, debugging and troubleshooting/diagnostic helpers. */
3268 /* netdev_printk helpers, similar to dev_printk */
3270 static inline const char *netdev_name(const struct net_device
*dev
)
3272 if (dev
->reg_state
!= NETREG_REGISTERED
)
3273 return "(unregistered net_device)";
3278 int netdev_printk(const char *level
, const struct net_device
*dev
,
3279 const char *format
, ...);
3281 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
3283 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
3285 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
3287 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
3289 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
3291 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
3293 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
3295 #define MODULE_ALIAS_NETDEV(device) \
3296 MODULE_ALIAS("netdev-" device)
3298 #if defined(CONFIG_DYNAMIC_DEBUG)
3299 #define netdev_dbg(__dev, format, args...) \
3301 dynamic_netdev_dbg(__dev, format, ##args); \
3303 #elif defined(DEBUG)
3304 #define netdev_dbg(__dev, format, args...) \
3305 netdev_printk(KERN_DEBUG, __dev, format, ##args)
3307 #define netdev_dbg(__dev, format, args...) \
3310 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
3315 #if defined(VERBOSE_DEBUG)
3316 #define netdev_vdbg netdev_dbg
3319 #define netdev_vdbg(dev, format, args...) \
3322 netdev_printk(KERN_DEBUG, dev, format, ##args); \
3328 * netdev_WARN() acts like dev_printk(), but with the key difference
3329 * of using a WARN/WARN_ON to get the message out, including the
3330 * file/line information and a backtrace.
3332 #define netdev_WARN(dev, format, args...) \
3333 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args)
3335 /* netif printk helpers, similar to netdev_printk */
3337 #define netif_printk(priv, type, level, dev, fmt, args...) \
3339 if (netif_msg_##type(priv)) \
3340 netdev_printk(level, (dev), fmt, ##args); \
3343 #define netif_level(level, priv, type, dev, fmt, args...) \
3345 if (netif_msg_##type(priv)) \
3346 netdev_##level(dev, fmt, ##args); \
3349 #define netif_emerg(priv, type, dev, fmt, args...) \
3350 netif_level(emerg, priv, type, dev, fmt, ##args)
3351 #define netif_alert(priv, type, dev, fmt, args...) \
3352 netif_level(alert, priv, type, dev, fmt, ##args)
3353 #define netif_crit(priv, type, dev, fmt, args...) \
3354 netif_level(crit, priv, type, dev, fmt, ##args)
3355 #define netif_err(priv, type, dev, fmt, args...) \
3356 netif_level(err, priv, type, dev, fmt, ##args)
3357 #define netif_warn(priv, type, dev, fmt, args...) \
3358 netif_level(warn, priv, type, dev, fmt, ##args)
3359 #define netif_notice(priv, type, dev, fmt, args...) \
3360 netif_level(notice, priv, type, dev, fmt, ##args)
3361 #define netif_info(priv, type, dev, fmt, args...) \
3362 netif_level(info, priv, type, dev, fmt, ##args)
3364 #if defined(CONFIG_DYNAMIC_DEBUG)
3365 #define netif_dbg(priv, type, netdev, format, args...) \
3367 if (netif_msg_##type(priv)) \
3368 dynamic_netdev_dbg(netdev, format, ##args); \
3370 #elif defined(DEBUG)
3371 #define netif_dbg(priv, type, dev, format, args...) \
3372 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3374 #define netif_dbg(priv, type, dev, format, args...) \
3377 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3382 #if defined(VERBOSE_DEBUG)
3383 #define netif_vdbg netif_dbg
3385 #define netif_vdbg(priv, type, dev, format, args...) \
3388 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3394 * The list of packet types we will receive (as opposed to discard)
3395 * and the routines to invoke.
3397 * Why 16. Because with 16 the only overlap we get on a hash of the
3398 * low nibble of the protocol value is RARP/SNAP/X.25.
3400 * NOTE: That is no longer true with the addition of VLAN tags. Not
3401 * sure which should go first, but I bet it won't make much
3402 * difference if we are running VLANs. The good news is that
3403 * this protocol won't be in the list unless compiled in, so
3404 * the average user (w/out VLANs) will not be adversely affected.
3420 #define PTYPE_HASH_SIZE (16)
3421 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3423 #endif /* _LINUX_NETDEVICE_H */