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 <linux/prefetch.h>
34 #include <asm/cache.h>
35 #include <asm/byteorder.h>
37 #include <linux/percpu.h>
38 #include <linux/rculist.h>
39 #include <linux/dmaengine.h>
40 #include <linux/workqueue.h>
41 #include <linux/dynamic_queue_limits.h>
43 #include <linux/ethtool.h>
44 #include <net/net_namespace.h>
47 #include <net/dcbnl.h>
49 #include <net/netprio_cgroup.h>
51 #include <linux/netdev_features.h>
52 #include <linux/neighbour.h>
53 #include <uapi/linux/netdevice.h>
60 /* 802.15.4 specific */
63 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
64 const struct ethtool_ops
*ops
);
66 /* Backlog congestion levels */
67 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
68 #define NET_RX_DROP 1 /* packet dropped */
71 * Transmit return codes: transmit return codes originate from three different
74 * - qdisc return codes
75 * - driver transmit return codes
78 * Drivers are allowed to return any one of those in their hard_start_xmit()
79 * function. Real network devices commonly used with qdiscs should only return
80 * the driver transmit return codes though - when qdiscs are used, the actual
81 * transmission happens asynchronously, so the value is not propagated to
82 * higher layers. Virtual network devices transmit synchronously, in this case
83 * the driver transmit return codes are consumed by dev_queue_xmit(), all
84 * others are propagated to higher layers.
87 /* qdisc ->enqueue() return codes. */
88 #define NET_XMIT_SUCCESS 0x00
89 #define NET_XMIT_DROP 0x01 /* skb dropped */
90 #define NET_XMIT_CN 0x02 /* congestion notification */
91 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
92 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
94 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
95 * indicates that the device will soon be dropping packets, or already drops
96 * some packets of the same priority; prompting us to send less aggressively. */
97 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
98 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
100 /* Driver transmit return codes */
101 #define NETDEV_TX_MASK 0xf0
104 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
105 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
106 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
107 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
109 typedef enum netdev_tx netdev_tx_t
;
112 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
113 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
115 static inline bool dev_xmit_complete(int rc
)
118 * Positive cases with an skb consumed by a driver:
119 * - successful transmission (rc == NETDEV_TX_OK)
120 * - error while transmitting (rc < 0)
121 * - error while queueing to a different device (rc & NET_XMIT_MASK)
123 if (likely(rc
< NET_XMIT_MASK
))
130 * Compute the worst case header length according to the protocols
134 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
135 # if defined(CONFIG_MAC80211_MESH)
136 # define LL_MAX_HEADER 128
138 # define LL_MAX_HEADER 96
141 # define LL_MAX_HEADER 32
144 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
145 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
146 #define MAX_HEADER LL_MAX_HEADER
148 #define MAX_HEADER (LL_MAX_HEADER + 48)
152 * Old network device statistics. Fields are native words
153 * (unsigned long) so they can be read and written atomically.
156 struct net_device_stats
{
157 unsigned long rx_packets
;
158 unsigned long tx_packets
;
159 unsigned long rx_bytes
;
160 unsigned long tx_bytes
;
161 unsigned long rx_errors
;
162 unsigned long tx_errors
;
163 unsigned long rx_dropped
;
164 unsigned long tx_dropped
;
165 unsigned long multicast
;
166 unsigned long collisions
;
167 unsigned long rx_length_errors
;
168 unsigned long rx_over_errors
;
169 unsigned long rx_crc_errors
;
170 unsigned long rx_frame_errors
;
171 unsigned long rx_fifo_errors
;
172 unsigned long rx_missed_errors
;
173 unsigned long tx_aborted_errors
;
174 unsigned long tx_carrier_errors
;
175 unsigned long tx_fifo_errors
;
176 unsigned long tx_heartbeat_errors
;
177 unsigned long tx_window_errors
;
178 unsigned long rx_compressed
;
179 unsigned long tx_compressed
;
183 #include <linux/cache.h>
184 #include <linux/skbuff.h>
187 #include <linux/static_key.h>
188 extern struct static_key rps_needed
;
195 struct netdev_hw_addr
{
196 struct list_head list
;
197 unsigned char addr
[MAX_ADDR_LEN
];
199 #define NETDEV_HW_ADDR_T_LAN 1
200 #define NETDEV_HW_ADDR_T_SAN 2
201 #define NETDEV_HW_ADDR_T_SLAVE 3
202 #define NETDEV_HW_ADDR_T_UNICAST 4
203 #define NETDEV_HW_ADDR_T_MULTICAST 5
208 struct rcu_head rcu_head
;
211 struct netdev_hw_addr_list
{
212 struct list_head list
;
216 #define netdev_hw_addr_list_count(l) ((l)->count)
217 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
218 #define netdev_hw_addr_list_for_each(ha, l) \
219 list_for_each_entry(ha, &(l)->list, list)
221 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
222 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
223 #define netdev_for_each_uc_addr(ha, dev) \
224 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
226 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
227 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
228 #define netdev_for_each_mc_addr(ha, dev) \
229 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
236 /* cached hardware header; allow for machine alignment needs. */
237 #define HH_DATA_MOD 16
238 #define HH_DATA_OFF(__len) \
239 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
240 #define HH_DATA_ALIGN(__len) \
241 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
242 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
245 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
247 * dev->hard_header_len ? (dev->hard_header_len +
248 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
250 * We could use other alignment values, but we must maintain the
251 * relationship HH alignment <= LL alignment.
253 #define LL_RESERVED_SPACE(dev) \
254 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
255 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
256 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
260 unsigned short type
, const void *daddr
,
261 const void *saddr
, unsigned int len
);
262 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
263 int (*rebuild
)(struct sk_buff
*skb
);
264 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
265 void (*cache_update
)(struct hh_cache
*hh
,
266 const struct net_device
*dev
,
267 const unsigned char *haddr
);
270 /* These flag bits are private to the generic network queueing
271 * layer, they may not be explicitly referenced by any other
275 enum netdev_state_t
{
277 __LINK_STATE_PRESENT
,
278 __LINK_STATE_NOCARRIER
,
279 __LINK_STATE_LINKWATCH_PENDING
,
280 __LINK_STATE_DORMANT
,
285 * This structure holds at boot time configured netdevice settings. They
286 * are then used in the device probing.
288 struct netdev_boot_setup
{
292 #define NETDEV_BOOT_SETUP_MAX 8
294 int __init
netdev_boot_setup(char *str
);
297 * Structure for NAPI scheduling similar to tasklet but with weighting
300 /* The poll_list must only be managed by the entity which
301 * changes the state of the NAPI_STATE_SCHED bit. This means
302 * whoever atomically sets that bit can add this napi_struct
303 * to the per-cpu poll_list, and whoever clears that bit
304 * can remove from the list right before clearing the bit.
306 struct list_head poll_list
;
310 unsigned int gro_count
;
311 int (*poll
)(struct napi_struct
*, int);
312 #ifdef CONFIG_NETPOLL
313 spinlock_t poll_lock
;
316 struct net_device
*dev
;
317 struct sk_buff
*gro_list
;
319 struct hrtimer timer
;
320 struct list_head dev_list
;
321 struct hlist_node napi_hash_node
;
322 unsigned int napi_id
;
326 NAPI_STATE_SCHED
, /* Poll is scheduled */
327 NAPI_STATE_DISABLE
, /* Disable pending */
328 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
329 NAPI_STATE_HASHED
, /* In NAPI hash */
339 typedef enum gro_result gro_result_t
;
342 * enum rx_handler_result - Possible return values for rx_handlers.
343 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
345 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
346 * case skb->dev was changed by rx_handler.
347 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
348 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
350 * rx_handlers are functions called from inside __netif_receive_skb(), to do
351 * special processing of the skb, prior to delivery to protocol handlers.
353 * Currently, a net_device can only have a single rx_handler registered. Trying
354 * to register a second rx_handler will return -EBUSY.
356 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
357 * To unregister a rx_handler on a net_device, use
358 * netdev_rx_handler_unregister().
360 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
363 * If the rx_handler consumed to skb in some way, it should return
364 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
365 * the skb to be delivered in some other ways.
367 * If the rx_handler changed skb->dev, to divert the skb to another
368 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
369 * new device will be called if it exists.
371 * If the rx_handler consider the skb should be ignored, it should return
372 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
373 * are registered on exact device (ptype->dev == skb->dev).
375 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
376 * delivered, it should return RX_HANDLER_PASS.
378 * A device without a registered rx_handler will behave as if rx_handler
379 * returned RX_HANDLER_PASS.
382 enum rx_handler_result
{
388 typedef enum rx_handler_result rx_handler_result_t
;
389 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
391 void __napi_schedule(struct napi_struct
*n
);
392 void __napi_schedule_irqoff(struct napi_struct
*n
);
394 static inline bool napi_disable_pending(struct napi_struct
*n
)
396 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
400 * napi_schedule_prep - check if napi can be scheduled
403 * Test if NAPI routine is already running, and if not mark
404 * it as running. This is used as a condition variable
405 * insure only one NAPI poll instance runs. We also make
406 * sure there is no pending NAPI disable.
408 static inline bool napi_schedule_prep(struct napi_struct
*n
)
410 return !napi_disable_pending(n
) &&
411 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
415 * napi_schedule - schedule NAPI poll
418 * Schedule NAPI poll routine to be called if it is not already
421 static inline void napi_schedule(struct napi_struct
*n
)
423 if (napi_schedule_prep(n
))
428 * napi_schedule_irqoff - schedule NAPI poll
431 * Variant of napi_schedule(), assuming hard irqs are masked.
433 static inline void napi_schedule_irqoff(struct napi_struct
*n
)
435 if (napi_schedule_prep(n
))
436 __napi_schedule_irqoff(n
);
439 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
440 static inline bool napi_reschedule(struct napi_struct
*napi
)
442 if (napi_schedule_prep(napi
)) {
443 __napi_schedule(napi
);
449 void __napi_complete(struct napi_struct
*n
);
450 void napi_complete_done(struct napi_struct
*n
, int work_done
);
452 * napi_complete - NAPI processing complete
455 * Mark NAPI processing as complete.
456 * Consider using napi_complete_done() instead.
458 static inline void napi_complete(struct napi_struct
*n
)
460 return napi_complete_done(n
, 0);
464 * napi_by_id - lookup a NAPI by napi_id
465 * @napi_id: hashed napi_id
467 * lookup @napi_id in napi_hash table
468 * must be called under rcu_read_lock()
470 struct napi_struct
*napi_by_id(unsigned int napi_id
);
473 * napi_hash_add - add a NAPI to global hashtable
474 * @napi: napi context
476 * generate a new napi_id and store a @napi under it in napi_hash
478 void napi_hash_add(struct napi_struct
*napi
);
481 * napi_hash_del - remove a NAPI from global table
482 * @napi: napi context
484 * Warning: caller must observe rcu grace period
485 * before freeing memory containing @napi
487 void napi_hash_del(struct napi_struct
*napi
);
490 * napi_disable - prevent NAPI from scheduling
493 * Stop NAPI from being scheduled on this context.
494 * Waits till any outstanding processing completes.
496 void napi_disable(struct napi_struct
*n
);
499 * napi_enable - enable NAPI scheduling
502 * Resume NAPI from being scheduled on this context.
503 * Must be paired with napi_disable.
505 static inline void napi_enable(struct napi_struct
*n
)
507 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
508 smp_mb__before_atomic();
509 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
514 * napi_synchronize - wait until NAPI is not running
517 * Wait until NAPI is done being scheduled on this context.
518 * Waits till any outstanding processing completes but
519 * does not disable future activations.
521 static inline void napi_synchronize(const struct napi_struct
*n
)
523 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
527 # define napi_synchronize(n) barrier()
530 enum netdev_queue_state_t
{
531 __QUEUE_STATE_DRV_XOFF
,
532 __QUEUE_STATE_STACK_XOFF
,
533 __QUEUE_STATE_FROZEN
,
536 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
537 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
538 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
540 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
541 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
543 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
547 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
548 * netif_tx_* functions below are used to manipulate this flag. The
549 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
550 * queue independently. The netif_xmit_*stopped functions below are called
551 * to check if the queue has been stopped by the driver or stack (either
552 * of the XOFF bits are set in the state). Drivers should not need to call
553 * netif_xmit*stopped functions, they should only be using netif_tx_*.
556 struct netdev_queue
{
560 struct net_device
*dev
;
561 struct Qdisc __rcu
*qdisc
;
562 struct Qdisc
*qdisc_sleeping
;
566 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
572 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
575 * please use this field instead of dev->trans_start
577 unsigned long trans_start
;
580 * Number of TX timeouts for this queue
581 * (/sys/class/net/DEV/Q/trans_timeout)
583 unsigned long trans_timeout
;
590 } ____cacheline_aligned_in_smp
;
592 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
594 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
601 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
603 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
610 * This structure holds an RPS map which can be of variable length. The
611 * map is an array of CPUs.
618 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
621 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
622 * tail pointer for that CPU's input queue at the time of last enqueue, and
623 * a hardware filter index.
625 struct rps_dev_flow
{
628 unsigned int last_qtail
;
630 #define RPS_NO_FILTER 0xffff
633 * The rps_dev_flow_table structure contains a table of flow mappings.
635 struct rps_dev_flow_table
{
638 struct rps_dev_flow flows
[0];
640 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
641 ((_num) * sizeof(struct rps_dev_flow)))
644 * The rps_sock_flow_table contains mappings of flows to the last CPU
645 * on which they were processed by the application (set in recvmsg).
647 struct rps_sock_flow_table
{
651 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
652 ((_num) * sizeof(u16)))
654 #define RPS_NO_CPU 0xffff
656 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
660 unsigned int cpu
, index
= hash
& table
->mask
;
662 /* We only give a hint, preemption can change cpu under us */
663 cpu
= raw_smp_processor_id();
665 if (table
->ents
[index
] != cpu
)
666 table
->ents
[index
] = cpu
;
670 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
674 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
677 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
679 #ifdef CONFIG_RFS_ACCEL
680 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
683 #endif /* CONFIG_RPS */
685 /* This structure contains an instance of an RX queue. */
686 struct netdev_rx_queue
{
688 struct rps_map __rcu
*rps_map
;
689 struct rps_dev_flow_table __rcu
*rps_flow_table
;
692 struct net_device
*dev
;
693 } ____cacheline_aligned_in_smp
;
696 * RX queue sysfs structures and functions.
698 struct rx_queue_attribute
{
699 struct attribute attr
;
700 ssize_t (*show
)(struct netdev_rx_queue
*queue
,
701 struct rx_queue_attribute
*attr
, char *buf
);
702 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
703 struct rx_queue_attribute
*attr
, const char *buf
, size_t len
);
708 * This structure holds an XPS map which can be of variable length. The
709 * map is an array of queues.
713 unsigned int alloc_len
;
717 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
718 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
722 * This structure holds all XPS maps for device. Maps are indexed by CPU.
724 struct xps_dev_maps
{
726 struct xps_map __rcu
*cpu_map
[0];
728 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
729 (nr_cpu_ids * sizeof(struct xps_map *)))
730 #endif /* CONFIG_XPS */
732 #define TC_MAX_QUEUE 16
733 #define TC_BITMASK 15
734 /* HW offloaded queuing disciplines txq count and offset maps */
735 struct netdev_tc_txq
{
740 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
742 * This structure is to hold information about the device
743 * configured to run FCoE protocol stack.
745 struct netdev_fcoe_hbainfo
{
746 char manufacturer
[64];
747 char serial_number
[64];
748 char hardware_version
[64];
749 char driver_version
[64];
750 char optionrom_version
[64];
751 char firmware_version
[64];
753 char model_description
[256];
757 #define MAX_PHYS_ITEM_ID_LEN 32
759 /* This structure holds a unique identifier to identify some
760 * physical item (port for example) used by a netdevice.
762 struct netdev_phys_item_id
{
763 unsigned char id
[MAX_PHYS_ITEM_ID_LEN
];
764 unsigned char id_len
;
767 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
768 struct sk_buff
*skb
);
771 * This structure defines the management hooks for network devices.
772 * The following hooks can be defined; unless noted otherwise, they are
773 * optional and can be filled with a null pointer.
775 * int (*ndo_init)(struct net_device *dev);
776 * This function is called once when network device is registered.
777 * The network device can use this to any late stage initializaton
778 * or semantic validattion. It can fail with an error code which will
779 * be propogated back to register_netdev
781 * void (*ndo_uninit)(struct net_device *dev);
782 * This function is called when device is unregistered or when registration
783 * fails. It is not called if init fails.
785 * int (*ndo_open)(struct net_device *dev);
786 * This function is called when network device transistions to the up
789 * int (*ndo_stop)(struct net_device *dev);
790 * This function is called when network device transistions to the down
793 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
794 * struct net_device *dev);
795 * Called when a packet needs to be transmitted.
796 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
797 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
798 * Required can not be NULL.
800 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
801 * void *accel_priv, select_queue_fallback_t fallback);
802 * Called to decide which queue to when device supports multiple
805 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
806 * This function is called to allow device receiver to make
807 * changes to configuration when multicast or promiscious is enabled.
809 * void (*ndo_set_rx_mode)(struct net_device *dev);
810 * This function is called device changes address list filtering.
811 * If driver handles unicast address filtering, it should set
812 * IFF_UNICAST_FLT to its priv_flags.
814 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
815 * This function is called when the Media Access Control address
816 * needs to be changed. If this interface is not defined, the
817 * mac address can not be changed.
819 * int (*ndo_validate_addr)(struct net_device *dev);
820 * Test if Media Access Control address is valid for the device.
822 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
823 * Called when a user request an ioctl which can't be handled by
824 * the generic interface code. If not defined ioctl's return
825 * not supported error code.
827 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
828 * Used to set network devices bus interface parameters. This interface
829 * is retained for legacy reason, new devices should use the bus
830 * interface (PCI) for low level management.
832 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
833 * Called when a user wants to change the Maximum Transfer Unit
834 * of a device. If not defined, any request to change MTU will
835 * will return an error.
837 * void (*ndo_tx_timeout)(struct net_device *dev);
838 * Callback uses when the transmitter has not made any progress
839 * for dev->watchdog ticks.
841 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
842 * struct rtnl_link_stats64 *storage);
843 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
844 * Called when a user wants to get the network device usage
845 * statistics. Drivers must do one of the following:
846 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
847 * rtnl_link_stats64 structure passed by the caller.
848 * 2. Define @ndo_get_stats to update a net_device_stats structure
849 * (which should normally be dev->stats) and return a pointer to
850 * it. The structure may be changed asynchronously only if each
851 * field is written atomically.
852 * 3. Update dev->stats asynchronously and atomically, and define
855 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
856 * If device support VLAN filtering this function is called when a
857 * VLAN id is registered.
859 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
860 * If device support VLAN filtering this function is called when a
861 * VLAN id is unregistered.
863 * void (*ndo_poll_controller)(struct net_device *dev);
865 * SR-IOV management functions.
866 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
867 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
868 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
870 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
871 * int (*ndo_get_vf_config)(struct net_device *dev,
872 * int vf, struct ifla_vf_info *ivf);
873 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
874 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
875 * struct nlattr *port[]);
876 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
877 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
878 * Called to setup 'tc' number of traffic classes in the net device. This
879 * is always called from the stack with the rtnl lock held and netif tx
880 * queues stopped. This allows the netdevice to perform queue management
883 * Fiber Channel over Ethernet (FCoE) offload functions.
884 * int (*ndo_fcoe_enable)(struct net_device *dev);
885 * Called when the FCoE protocol stack wants to start using LLD for FCoE
886 * so the underlying device can perform whatever needed configuration or
887 * initialization to support acceleration of FCoE traffic.
889 * int (*ndo_fcoe_disable)(struct net_device *dev);
890 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
891 * so the underlying device can perform whatever needed clean-ups to
892 * stop supporting acceleration of FCoE traffic.
894 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
895 * struct scatterlist *sgl, unsigned int sgc);
896 * Called when the FCoE Initiator wants to initialize an I/O that
897 * is a possible candidate for Direct Data Placement (DDP). The LLD can
898 * perform necessary setup and returns 1 to indicate the device is set up
899 * successfully to perform DDP on this I/O, otherwise this returns 0.
901 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
902 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
903 * indicated by the FC exchange id 'xid', so the underlying device can
904 * clean up and reuse resources for later DDP requests.
906 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
907 * struct scatterlist *sgl, unsigned int sgc);
908 * Called when the FCoE Target wants to initialize an I/O that
909 * is a possible candidate for Direct Data Placement (DDP). The LLD can
910 * perform necessary setup and returns 1 to indicate the device is set up
911 * successfully to perform DDP on this I/O, otherwise this returns 0.
913 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
914 * struct netdev_fcoe_hbainfo *hbainfo);
915 * Called when the FCoE Protocol stack wants information on the underlying
916 * device. This information is utilized by the FCoE protocol stack to
917 * register attributes with Fiber Channel management service as per the
918 * FC-GS Fabric Device Management Information(FDMI) specification.
920 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
921 * Called when the underlying device wants to override default World Wide
922 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
923 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
924 * protocol stack to use.
927 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
928 * u16 rxq_index, u32 flow_id);
929 * Set hardware filter for RFS. rxq_index is the target queue index;
930 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
931 * Return the filter ID on success, or a negative error code.
933 * Slave management functions (for bridge, bonding, etc).
934 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
935 * Called to make another netdev an underling.
937 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
938 * Called to release previously enslaved netdev.
940 * Feature/offload setting functions.
941 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
942 * netdev_features_t features);
943 * Adjusts the requested feature flags according to device-specific
944 * constraints, and returns the resulting flags. Must not modify
947 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
948 * Called to update device configuration to new features. Passed
949 * feature set might be less than what was returned by ndo_fix_features()).
950 * Must return >0 or -errno if it changed dev->features itself.
952 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
953 * struct net_device *dev,
954 * const unsigned char *addr, u16 vid, u16 flags)
955 * Adds an FDB entry to dev for addr.
956 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
957 * struct net_device *dev,
958 * const unsigned char *addr, u16 vid)
959 * Deletes the FDB entry from dev coresponding to addr.
960 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
961 * struct net_device *dev, struct net_device *filter_dev,
963 * Used to add FDB entries to dump requests. Implementers should add
964 * entries to skb and update idx with the number of entries.
966 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
967 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
968 * struct net_device *dev, u32 filter_mask)
970 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
971 * Called to change device carrier. Soft-devices (like dummy, team, etc)
972 * which do not represent real hardware may define this to allow their
973 * userspace components to manage their virtual carrier state. Devices
974 * that determine carrier state from physical hardware properties (eg
975 * network cables) or protocol-dependent mechanisms (eg
976 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
978 * int (*ndo_get_phys_port_id)(struct net_device *dev,
979 * struct netdev_phys_item_id *ppid);
980 * Called to get ID of physical port of this device. If driver does
981 * not implement this, it is assumed that the hw is not able to have
982 * multiple net devices on single physical port.
984 * void (*ndo_add_vxlan_port)(struct net_device *dev,
985 * sa_family_t sa_family, __be16 port);
986 * Called by vxlan to notiy a driver about the UDP port and socket
987 * address family that vxlan is listnening to. It is called only when
988 * a new port starts listening. The operation is protected by the
989 * vxlan_net->sock_lock.
991 * void (*ndo_del_vxlan_port)(struct net_device *dev,
992 * sa_family_t sa_family, __be16 port);
993 * Called by vxlan to notify the driver about a UDP port and socket
994 * address family that vxlan is not listening to anymore. The operation
995 * is protected by the vxlan_net->sock_lock.
997 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
998 * struct net_device *dev)
999 * Called by upper layer devices to accelerate switching or other
1000 * station functionality into hardware. 'pdev is the lowerdev
1001 * to use for the offload and 'dev' is the net device that will
1002 * back the offload. Returns a pointer to the private structure
1003 * the upper layer will maintain.
1004 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1005 * Called by upper layer device to delete the station created
1006 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1007 * the station and priv is the structure returned by the add
1009 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
1010 * struct net_device *dev,
1012 * Callback to use for xmit over the accelerated station. This
1013 * is used in place of ndo_start_xmit on accelerated net
1015 * netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
1016 * struct net_device *dev
1017 * netdev_features_t features);
1018 * Called by core transmit path to determine if device is capable of
1019 * performing offload operations on a given packet. This is to give
1020 * the device an opportunity to implement any restrictions that cannot
1021 * be otherwise expressed by feature flags. The check is called with
1022 * the set of features that the stack has calculated and it returns
1023 * those the driver believes to be appropriate.
1025 * int (*ndo_switch_parent_id_get)(struct net_device *dev,
1026 * struct netdev_phys_item_id *psid);
1027 * Called to get an ID of the switch chip this port is part of.
1028 * If driver implements this, it indicates that it represents a port
1030 * int (*ndo_switch_port_stp_update)(struct net_device *dev, u8 state);
1031 * Called to notify switch device port of bridge port STP
1034 struct net_device_ops
{
1035 int (*ndo_init
)(struct net_device
*dev
);
1036 void (*ndo_uninit
)(struct net_device
*dev
);
1037 int (*ndo_open
)(struct net_device
*dev
);
1038 int (*ndo_stop
)(struct net_device
*dev
);
1039 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
1040 struct net_device
*dev
);
1041 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1042 struct sk_buff
*skb
,
1044 select_queue_fallback_t fallback
);
1045 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1047 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1048 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1050 int (*ndo_validate_addr
)(struct net_device
*dev
);
1051 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1052 struct ifreq
*ifr
, int cmd
);
1053 int (*ndo_set_config
)(struct net_device
*dev
,
1055 int (*ndo_change_mtu
)(struct net_device
*dev
,
1057 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1058 struct neigh_parms
*);
1059 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1061 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
1062 struct rtnl_link_stats64
*storage
);
1063 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1065 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1066 __be16 proto
, u16 vid
);
1067 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1068 __be16 proto
, u16 vid
);
1069 #ifdef CONFIG_NET_POLL_CONTROLLER
1070 void (*ndo_poll_controller
)(struct net_device
*dev
);
1071 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1072 struct netpoll_info
*info
);
1073 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1075 #ifdef CONFIG_NET_RX_BUSY_POLL
1076 int (*ndo_busy_poll
)(struct napi_struct
*dev
);
1078 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1079 int queue
, u8
*mac
);
1080 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1081 int queue
, u16 vlan
, u8 qos
);
1082 int (*ndo_set_vf_rate
)(struct net_device
*dev
,
1083 int vf
, int min_tx_rate
,
1085 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1086 int vf
, bool setting
);
1087 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1089 struct ifla_vf_info
*ivf
);
1090 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1091 int vf
, int link_state
);
1092 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1094 struct nlattr
*port
[]);
1095 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1096 int vf
, struct sk_buff
*skb
);
1097 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
1098 #if IS_ENABLED(CONFIG_FCOE)
1099 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1100 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1101 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1103 struct scatterlist
*sgl
,
1105 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1107 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1109 struct scatterlist
*sgl
,
1111 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1112 struct netdev_fcoe_hbainfo
*hbainfo
);
1115 #if IS_ENABLED(CONFIG_LIBFCOE)
1116 #define NETDEV_FCOE_WWNN 0
1117 #define NETDEV_FCOE_WWPN 1
1118 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1119 u64
*wwn
, int type
);
1122 #ifdef CONFIG_RFS_ACCEL
1123 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1124 const struct sk_buff
*skb
,
1128 int (*ndo_add_slave
)(struct net_device
*dev
,
1129 struct net_device
*slave_dev
);
1130 int (*ndo_del_slave
)(struct net_device
*dev
,
1131 struct net_device
*slave_dev
);
1132 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1133 netdev_features_t features
);
1134 int (*ndo_set_features
)(struct net_device
*dev
,
1135 netdev_features_t features
);
1136 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1137 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1139 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1140 struct nlattr
*tb
[],
1141 struct net_device
*dev
,
1142 const unsigned char *addr
,
1145 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1146 struct nlattr
*tb
[],
1147 struct net_device
*dev
,
1148 const unsigned char *addr
,
1150 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1151 struct netlink_callback
*cb
,
1152 struct net_device
*dev
,
1153 struct net_device
*filter_dev
,
1156 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1157 struct nlmsghdr
*nlh
);
1158 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1160 struct net_device
*dev
,
1162 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1163 struct nlmsghdr
*nlh
);
1164 int (*ndo_change_carrier
)(struct net_device
*dev
,
1166 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1167 struct netdev_phys_item_id
*ppid
);
1168 void (*ndo_add_vxlan_port
)(struct net_device
*dev
,
1169 sa_family_t sa_family
,
1171 void (*ndo_del_vxlan_port
)(struct net_device
*dev
,
1172 sa_family_t sa_family
,
1175 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1176 struct net_device
*dev
);
1177 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1180 netdev_tx_t (*ndo_dfwd_start_xmit
) (struct sk_buff
*skb
,
1181 struct net_device
*dev
,
1183 int (*ndo_get_lock_subclass
)(struct net_device
*dev
);
1184 netdev_features_t (*ndo_features_check
) (struct sk_buff
*skb
,
1185 struct net_device
*dev
,
1186 netdev_features_t features
);
1187 #ifdef CONFIG_NET_SWITCHDEV
1188 int (*ndo_switch_parent_id_get
)(struct net_device
*dev
,
1189 struct netdev_phys_item_id
*psid
);
1190 int (*ndo_switch_port_stp_update
)(struct net_device
*dev
,
1196 * enum net_device_priv_flags - &struct net_device priv_flags
1198 * These are the &struct net_device, they are only set internally
1199 * by drivers and used in the kernel. These flags are invisible to
1200 * userspace, this means that the order of these flags can change
1201 * during any kernel release.
1203 * You should have a pretty good reason to be extending these flags.
1205 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1206 * @IFF_EBRIDGE: Ethernet bridging device
1207 * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active
1208 * @IFF_MASTER_8023AD: bonding master, 802.3ad
1209 * @IFF_MASTER_ALB: bonding master, balance-alb
1210 * @IFF_BONDING: bonding master or slave
1211 * @IFF_SLAVE_NEEDARP: need ARPs for validation
1212 * @IFF_ISATAP: ISATAP interface (RFC4214)
1213 * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
1214 * @IFF_WAN_HDLC: WAN HDLC device
1215 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1217 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1218 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1219 * @IFF_MACVLAN_PORT: device used as macvlan port
1220 * @IFF_BRIDGE_PORT: device used as bridge port
1221 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1222 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1223 * @IFF_UNICAST_FLT: Supports unicast filtering
1224 * @IFF_TEAM_PORT: device used as team port
1225 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1226 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1227 * change when it's running
1228 * @IFF_MACVLAN: Macvlan device
1230 enum netdev_priv_flags
{
1231 IFF_802_1Q_VLAN
= 1<<0,
1233 IFF_SLAVE_INACTIVE
= 1<<2,
1234 IFF_MASTER_8023AD
= 1<<3,
1235 IFF_MASTER_ALB
= 1<<4,
1237 IFF_SLAVE_NEEDARP
= 1<<6,
1239 IFF_MASTER_ARPMON
= 1<<8,
1240 IFF_WAN_HDLC
= 1<<9,
1241 IFF_XMIT_DST_RELEASE
= 1<<10,
1242 IFF_DONT_BRIDGE
= 1<<11,
1243 IFF_DISABLE_NETPOLL
= 1<<12,
1244 IFF_MACVLAN_PORT
= 1<<13,
1245 IFF_BRIDGE_PORT
= 1<<14,
1246 IFF_OVS_DATAPATH
= 1<<15,
1247 IFF_TX_SKB_SHARING
= 1<<16,
1248 IFF_UNICAST_FLT
= 1<<17,
1249 IFF_TEAM_PORT
= 1<<18,
1250 IFF_SUPP_NOFCS
= 1<<19,
1251 IFF_LIVE_ADDR_CHANGE
= 1<<20,
1252 IFF_MACVLAN
= 1<<21,
1253 IFF_XMIT_DST_RELEASE_PERM
= 1<<22,
1254 IFF_IPVLAN_MASTER
= 1<<23,
1255 IFF_IPVLAN_SLAVE
= 1<<24,
1258 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1259 #define IFF_EBRIDGE IFF_EBRIDGE
1260 #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE
1261 #define IFF_MASTER_8023AD IFF_MASTER_8023AD
1262 #define IFF_MASTER_ALB IFF_MASTER_ALB
1263 #define IFF_BONDING IFF_BONDING
1264 #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP
1265 #define IFF_ISATAP IFF_ISATAP
1266 #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON
1267 #define IFF_WAN_HDLC IFF_WAN_HDLC
1268 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1269 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1270 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1271 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1272 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1273 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1274 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1275 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1276 #define IFF_TEAM_PORT IFF_TEAM_PORT
1277 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1278 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1279 #define IFF_MACVLAN IFF_MACVLAN
1280 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1281 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1282 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1285 * struct net_device - The DEVICE structure.
1286 * Actually, this whole structure is a big mistake. It mixes I/O
1287 * data with strictly "high-level" data, and it has to know about
1288 * almost every data structure used in the INET module.
1290 * @name: This is the first field of the "visible" part of this structure
1291 * (i.e. as seen by users in the "Space.c" file). It is the name
1294 * @name_hlist: Device name hash chain, please keep it close to name[]
1295 * @ifalias: SNMP alias
1296 * @mem_end: Shared memory end
1297 * @mem_start: Shared memory start
1298 * @base_addr: Device I/O address
1299 * @irq: Device IRQ number
1301 * @state: Generic network queuing layer state, see netdev_state_t
1302 * @dev_list: The global list of network devices
1303 * @napi_list: List entry, that is used for polling napi devices
1304 * @unreg_list: List entry, that is used, when we are unregistering the
1305 * device, see the function unregister_netdev
1306 * @close_list: List entry, that is used, when we are closing the device
1308 * @adj_list: Directly linked devices, like slaves for bonding
1309 * @all_adj_list: All linked devices, *including* neighbours
1310 * @features: Currently active device features
1311 * @hw_features: User-changeable features
1313 * @wanted_features: User-requested features
1314 * @vlan_features: Mask of features inheritable by VLAN devices
1316 * @hw_enc_features: Mask of features inherited by encapsulating devices
1317 * This field indicates what encapsulation
1318 * offloads the hardware is capable of doing,
1319 * and drivers will need to set them appropriately.
1321 * @mpls_features: Mask of features inheritable by MPLS
1323 * @ifindex: interface index
1324 * @iflink: unique device identifier
1326 * @stats: Statistics struct, which was left as a legacy, use
1327 * rtnl_link_stats64 instead
1329 * @rx_dropped: Dropped packets by core network,
1330 * do not use this in drivers
1331 * @tx_dropped: Dropped packets by core network,
1332 * do not use this in drivers
1334 * @carrier_changes: Stats to monitor carrier on<->off transitions
1336 * @wireless_handlers: List of functions to handle Wireless Extensions,
1338 * see <net/iw_handler.h> for details.
1339 * @wireless_data: Instance data managed by the core of wireless extensions
1341 * @netdev_ops: Includes several pointers to callbacks,
1342 * if one wants to override the ndo_*() functions
1343 * @ethtool_ops: Management operations
1344 * @fwd_ops: Management operations
1345 * @header_ops: Includes callbacks for creating,parsing,rebuilding,etc
1346 * of Layer 2 headers.
1348 * @flags: Interface flags (a la BSD)
1349 * @priv_flags: Like 'flags' but invisible to userspace,
1350 * see if.h for the definitions
1351 * @gflags: Global flags ( kept as legacy )
1352 * @padded: How much padding added by alloc_netdev()
1353 * @operstate: RFC2863 operstate
1354 * @link_mode: Mapping policy to operstate
1355 * @if_port: Selectable AUI, TP, ...
1357 * @mtu: Interface MTU value
1358 * @type: Interface hardware type
1359 * @hard_header_len: Hardware header length
1361 * @needed_headroom: Extra headroom the hardware may need, but not in all
1362 * cases can this be guaranteed
1363 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1364 * cases can this be guaranteed. Some cases also use
1365 * LL_MAX_HEADER instead to allocate the skb
1367 * interface address info:
1369 * @perm_addr: Permanent hw address
1370 * @addr_assign_type: Hw address assignment type
1371 * @addr_len: Hardware address length
1372 * @neigh_priv_len; Used in neigh_alloc(),
1373 * initialized only in atm/clip.c
1374 * @dev_id: Used to differentiate devices that share
1375 * the same link layer address
1376 * @dev_port: Used to differentiate devices that share
1378 * @addr_list_lock: XXX: need comments on this one
1379 * @uc: unicast mac addresses
1380 * @mc: multicast mac addresses
1381 * @dev_addrs: list of device hw addresses
1382 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1383 * @uc_promisc: Counter, that indicates, that promiscuous mode
1384 * has been enabled due to the need to listen to
1385 * additional unicast addresses in a device that
1386 * does not implement ndo_set_rx_mode()
1387 * @promiscuity: Number of times, the NIC is told to work in
1388 * Promiscuous mode, if it becomes 0 the NIC will
1389 * exit from working in Promiscuous mode
1390 * @allmulti: Counter, enables or disables allmulticast mode
1392 * @vlan_info: VLAN info
1393 * @dsa_ptr: dsa specific data
1394 * @tipc_ptr: TIPC specific data
1395 * @atalk_ptr: AppleTalk link
1396 * @ip_ptr: IPv4 specific data
1397 * @dn_ptr: DECnet specific data
1398 * @ip6_ptr: IPv6 specific data
1399 * @ax25_ptr: AX.25 specific data
1400 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1402 * @last_rx: Time of last Rx
1403 * @dev_addr: Hw address (before bcast,
1404 * because most packets are unicast)
1406 * @_rx: Array of RX queues
1407 * @num_rx_queues: Number of RX queues
1408 * allocated at register_netdev() time
1409 * @real_num_rx_queues: Number of RX queues currently active in device
1411 * @rx_handler: handler for received packets
1412 * @rx_handler_data: XXX: need comments on this one
1413 * @ingress_queue: XXX: need comments on this one
1414 * @broadcast: hw bcast address
1416 * @_tx: Array of TX queues
1417 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1418 * @real_num_tx_queues: Number of TX queues currently active in device
1419 * @qdisc: Root qdisc from userspace point of view
1420 * @tx_queue_len: Max frames per queue allowed
1421 * @tx_global_lock: XXX: need comments on this one
1423 * @xps_maps: XXX: need comments on this one
1425 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1426 * indexed by RX queue number. Assigned by driver.
1427 * This must only be set if the ndo_rx_flow_steer
1428 * operation is defined
1430 * @trans_start: Time (in jiffies) of last Tx
1431 * @watchdog_timeo: Represents the timeout that is used by
1432 * the watchdog ( see dev_watchdog() )
1433 * @watchdog_timer: List of timers
1435 * @pcpu_refcnt: Number of references to this device
1436 * @todo_list: Delayed register/unregister
1437 * @index_hlist: Device index hash chain
1438 * @link_watch_list: XXX: need comments on this one
1440 * @reg_state: Register/unregister state machine
1441 * @dismantle: Device is going to be freed
1442 * @rtnl_link_state: This enum represents the phases of creating
1445 * @destructor: Called from unregister,
1446 * can be used to call free_netdev
1447 * @npinfo: XXX: need comments on this one
1448 * @nd_net: Network namespace this network device is inside
1450 * @ml_priv: Mid-layer private
1451 * @lstats: Loopback statistics
1452 * @tstats: Tunnel statistics
1453 * @dstats: Dummy statistics
1454 * @vstats: Virtual ethernet statistics
1459 * @dev: Class/net/name entry
1460 * @sysfs_groups: Space for optional device, statistics and wireless
1463 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1464 * @rtnl_link_ops: Rtnl_link_ops
1466 * @gso_max_size: Maximum size of generic segmentation offload
1467 * @gso_max_segs: Maximum number of segments that can be passed to the
1469 * @gso_min_segs: Minimum number of segments that can be passed to the
1472 * @dcbnl_ops: Data Center Bridging netlink ops
1473 * @num_tc: Number of traffic classes in the net device
1474 * @tc_to_txq: XXX: need comments on this one
1475 * @prio_tc_map XXX: need comments on this one
1477 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1479 * @priomap: XXX: need comments on this one
1480 * @phydev: Physical device may attach itself
1481 * for hardware timestamping
1483 * @qdisc_tx_busylock: XXX: need comments on this one
1485 * @group: The group, that the device belongs to
1486 * @pm_qos_req: Power Management QoS object
1488 * FIXME: cleanup struct net_device such that network protocol info
1493 char name
[IFNAMSIZ
];
1494 struct hlist_node name_hlist
;
1497 * I/O specific fields
1498 * FIXME: Merge these and struct ifmap into one
1500 unsigned long mem_end
;
1501 unsigned long mem_start
;
1502 unsigned long base_addr
;
1506 * Some hardware also needs these fields (state,dev_list,
1507 * napi_list,unreg_list,close_list) but they are not
1508 * part of the usual set specified in Space.c.
1511 unsigned long state
;
1513 struct list_head dev_list
;
1514 struct list_head napi_list
;
1515 struct list_head unreg_list
;
1516 struct list_head close_list
;
1519 struct list_head upper
;
1520 struct list_head lower
;
1524 struct list_head upper
;
1525 struct list_head lower
;
1528 netdev_features_t features
;
1529 netdev_features_t hw_features
;
1530 netdev_features_t wanted_features
;
1531 netdev_features_t vlan_features
;
1532 netdev_features_t hw_enc_features
;
1533 netdev_features_t mpls_features
;
1538 struct net_device_stats stats
;
1540 atomic_long_t rx_dropped
;
1541 atomic_long_t tx_dropped
;
1543 atomic_t carrier_changes
;
1545 #ifdef CONFIG_WIRELESS_EXT
1546 const struct iw_handler_def
* wireless_handlers
;
1547 struct iw_public_data
* wireless_data
;
1549 const struct net_device_ops
*netdev_ops
;
1550 const struct ethtool_ops
*ethtool_ops
;
1551 const struct forwarding_accel_ops
*fwd_ops
;
1553 const struct header_ops
*header_ops
;
1556 unsigned int priv_flags
;
1558 unsigned short gflags
;
1559 unsigned short padded
;
1561 unsigned char operstate
;
1562 unsigned char link_mode
;
1564 unsigned char if_port
;
1568 unsigned short type
;
1569 unsigned short hard_header_len
;
1571 unsigned short needed_headroom
;
1572 unsigned short needed_tailroom
;
1574 /* Interface address info. */
1575 unsigned char perm_addr
[MAX_ADDR_LEN
];
1576 unsigned char addr_assign_type
;
1577 unsigned char addr_len
;
1578 unsigned short neigh_priv_len
;
1579 unsigned short dev_id
;
1580 unsigned short dev_port
;
1581 spinlock_t addr_list_lock
;
1582 struct netdev_hw_addr_list uc
;
1583 struct netdev_hw_addr_list mc
;
1584 struct netdev_hw_addr_list dev_addrs
;
1587 struct kset
*queues_kset
;
1590 unsigned char name_assign_type
;
1593 unsigned int promiscuity
;
1594 unsigned int allmulti
;
1597 /* Protocol specific pointers */
1599 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1600 struct vlan_info __rcu
*vlan_info
;
1602 #if IS_ENABLED(CONFIG_NET_DSA)
1603 struct dsa_switch_tree
*dsa_ptr
;
1605 #if IS_ENABLED(CONFIG_TIPC)
1606 struct tipc_bearer __rcu
*tipc_ptr
;
1609 struct in_device __rcu
*ip_ptr
;
1610 struct dn_dev __rcu
*dn_ptr
;
1611 struct inet6_dev __rcu
*ip6_ptr
;
1613 struct wireless_dev
*ieee80211_ptr
;
1614 struct wpan_dev
*ieee802154_ptr
;
1617 * Cache lines mostly used on receive path (including eth_type_trans())
1619 unsigned long last_rx
;
1621 /* Interface address info used in eth_type_trans() */
1622 unsigned char *dev_addr
;
1626 struct netdev_rx_queue
*_rx
;
1628 unsigned int num_rx_queues
;
1629 unsigned int real_num_rx_queues
;
1633 unsigned long gro_flush_timeout
;
1634 rx_handler_func_t __rcu
*rx_handler
;
1635 void __rcu
*rx_handler_data
;
1637 struct netdev_queue __rcu
*ingress_queue
;
1638 unsigned char broadcast
[MAX_ADDR_LEN
];
1642 * Cache lines mostly used on transmit path
1644 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1645 unsigned int num_tx_queues
;
1646 unsigned int real_num_tx_queues
;
1647 struct Qdisc
*qdisc
;
1648 unsigned long tx_queue_len
;
1649 spinlock_t tx_global_lock
;
1652 struct xps_dev_maps __rcu
*xps_maps
;
1654 #ifdef CONFIG_RFS_ACCEL
1655 struct cpu_rmap
*rx_cpu_rmap
;
1658 /* These may be needed for future network-power-down code. */
1661 * trans_start here is expensive for high speed devices on SMP,
1662 * please use netdev_queue->trans_start instead.
1664 unsigned long trans_start
;
1667 struct timer_list watchdog_timer
;
1669 int __percpu
*pcpu_refcnt
;
1670 struct list_head todo_list
;
1672 struct hlist_node index_hlist
;
1673 struct list_head link_watch_list
;
1675 enum { NETREG_UNINITIALIZED
=0,
1676 NETREG_REGISTERED
, /* completed register_netdevice */
1677 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1678 NETREG_UNREGISTERED
, /* completed unregister todo */
1679 NETREG_RELEASED
, /* called free_netdev */
1680 NETREG_DUMMY
, /* dummy device for NAPI poll */
1686 RTNL_LINK_INITIALIZED
,
1687 RTNL_LINK_INITIALIZING
,
1688 } rtnl_link_state
:16;
1690 void (*destructor
)(struct net_device
*dev
);
1692 #ifdef CONFIG_NETPOLL
1693 struct netpoll_info __rcu
*npinfo
;
1696 #ifdef CONFIG_NET_NS
1700 /* mid-layer private */
1703 struct pcpu_lstats __percpu
*lstats
;
1704 struct pcpu_sw_netstats __percpu
*tstats
;
1705 struct pcpu_dstats __percpu
*dstats
;
1706 struct pcpu_vstats __percpu
*vstats
;
1709 struct garp_port __rcu
*garp_port
;
1710 struct mrp_port __rcu
*mrp_port
;
1713 const struct attribute_group
*sysfs_groups
[4];
1714 const struct attribute_group
*sysfs_rx_queue_group
;
1716 const struct rtnl_link_ops
*rtnl_link_ops
;
1718 /* for setting kernel sock attribute on TCP connection setup */
1719 #define GSO_MAX_SIZE 65536
1720 unsigned int gso_max_size
;
1721 #define GSO_MAX_SEGS 65535
1725 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1728 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1729 u8 prio_tc_map
[TC_BITMASK
+ 1];
1731 #if IS_ENABLED(CONFIG_FCOE)
1732 unsigned int fcoe_ddp_xid
;
1734 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1735 struct netprio_map __rcu
*priomap
;
1737 struct phy_device
*phydev
;
1738 struct lock_class_key
*qdisc_tx_busylock
;
1740 struct pm_qos_request pm_qos_req
;
1742 #define to_net_dev(d) container_of(d, struct net_device, dev)
1744 #define NETDEV_ALIGN 32
1747 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1749 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1753 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1755 if (tc
>= dev
->num_tc
)
1758 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1763 void netdev_reset_tc(struct net_device
*dev
)
1766 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1767 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1771 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1773 if (tc
>= dev
->num_tc
)
1776 dev
->tc_to_txq
[tc
].count
= count
;
1777 dev
->tc_to_txq
[tc
].offset
= offset
;
1782 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1784 if (num_tc
> TC_MAX_QUEUE
)
1787 dev
->num_tc
= num_tc
;
1792 int netdev_get_num_tc(struct net_device
*dev
)
1798 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1801 return &dev
->_tx
[index
];
1804 static inline struct netdev_queue
*skb_get_tx_queue(const struct net_device
*dev
,
1805 const struct sk_buff
*skb
)
1807 return netdev_get_tx_queue(dev
, skb_get_queue_mapping(skb
));
1810 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1811 void (*f
)(struct net_device
*,
1812 struct netdev_queue
*,
1818 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1819 f(dev
, &dev
->_tx
[i
], arg
);
1822 struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1823 struct sk_buff
*skb
,
1827 * Net namespace inlines
1830 struct net
*dev_net(const struct net_device
*dev
)
1832 return read_pnet(&dev
->nd_net
);
1836 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1838 #ifdef CONFIG_NET_NS
1839 release_net(dev
->nd_net
);
1840 dev
->nd_net
= hold_net(net
);
1844 static inline bool netdev_uses_dsa(struct net_device
*dev
)
1846 #if IS_ENABLED(CONFIG_NET_DSA)
1847 if (dev
->dsa_ptr
!= NULL
)
1848 return dsa_uses_tagged_protocol(dev
->dsa_ptr
);
1854 * netdev_priv - access network device private data
1855 * @dev: network device
1857 * Get network device private data
1859 static inline void *netdev_priv(const struct net_device
*dev
)
1861 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1864 /* Set the sysfs physical device reference for the network logical device
1865 * if set prior to registration will cause a symlink during initialization.
1867 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1869 /* Set the sysfs device type for the network logical device to allow
1870 * fine-grained identification of different network device types. For
1871 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1873 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1875 /* Default NAPI poll() weight
1876 * Device drivers are strongly advised to not use bigger value
1878 #define NAPI_POLL_WEIGHT 64
1881 * netif_napi_add - initialize a napi context
1882 * @dev: network device
1883 * @napi: napi context
1884 * @poll: polling function
1885 * @weight: default weight
1887 * netif_napi_add() must be used to initialize a napi context prior to calling
1888 * *any* of the other napi related functions.
1890 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1891 int (*poll
)(struct napi_struct
*, int), int weight
);
1894 * netif_napi_del - remove a napi context
1895 * @napi: napi context
1897 * netif_napi_del() removes a napi context from the network device napi list
1899 void netif_napi_del(struct napi_struct
*napi
);
1901 struct napi_gro_cb
{
1902 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1905 /* Length of frag0. */
1906 unsigned int frag0_len
;
1908 /* This indicates where we are processing relative to skb->data. */
1911 /* This is non-zero if the packet cannot be merged with the new skb. */
1914 /* Save the IP ID here and check when we get to the transport layer */
1917 /* Number of segments aggregated. */
1920 /* This is non-zero if the packet may be of the same flow. */
1925 #define NAPI_GRO_FREE 1
1926 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1928 /* jiffies when first packet was created/queued */
1931 /* Used in ipv6_gro_receive() and foo-over-udp */
1934 /* Used in udp_gro_receive */
1937 /* GRO checksum is valid */
1940 /* Number of checksums via CHECKSUM_UNNECESSARY */
1943 /* Used in foo-over-udp, set in udp[46]_gro_receive */
1946 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
1949 /* used in skb_gro_receive() slow path */
1950 struct sk_buff
*last
;
1953 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1955 struct packet_type
{
1956 __be16 type
; /* This is really htons(ether_type). */
1957 struct net_device
*dev
; /* NULL is wildcarded here */
1958 int (*func
) (struct sk_buff
*,
1959 struct net_device
*,
1960 struct packet_type
*,
1961 struct net_device
*);
1962 bool (*id_match
)(struct packet_type
*ptype
,
1964 void *af_packet_priv
;
1965 struct list_head list
;
1968 struct offload_callbacks
{
1969 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1970 netdev_features_t features
);
1971 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1972 struct sk_buff
*skb
);
1973 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
1976 struct packet_offload
{
1977 __be16 type
; /* This is really htons(ether_type). */
1978 struct offload_callbacks callbacks
;
1979 struct list_head list
;
1982 struct udp_offload
{
1985 struct offload_callbacks callbacks
;
1988 /* often modified stats are per cpu, other are shared (netdev->stats) */
1989 struct pcpu_sw_netstats
{
1994 struct u64_stats_sync syncp
;
1997 #define netdev_alloc_pcpu_stats(type) \
1999 typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
2002 for_each_possible_cpu(i) { \
2003 typeof(type) *stat; \
2004 stat = per_cpu_ptr(pcpu_stats, i); \
2005 u64_stats_init(&stat->syncp); \
2011 #include <linux/notifier.h>
2013 /* netdevice notifier chain. Please remember to update the rtnetlink
2014 * notification exclusion list in rtnetlink_event() when adding new
2017 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2018 #define NETDEV_DOWN 0x0002
2019 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2020 detected a hardware crash and restarted
2021 - we can use this eg to kick tcp sessions
2023 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2024 #define NETDEV_REGISTER 0x0005
2025 #define NETDEV_UNREGISTER 0x0006
2026 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2027 #define NETDEV_CHANGEADDR 0x0008
2028 #define NETDEV_GOING_DOWN 0x0009
2029 #define NETDEV_CHANGENAME 0x000A
2030 #define NETDEV_FEAT_CHANGE 0x000B
2031 #define NETDEV_BONDING_FAILOVER 0x000C
2032 #define NETDEV_PRE_UP 0x000D
2033 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2034 #define NETDEV_POST_TYPE_CHANGE 0x000F
2035 #define NETDEV_POST_INIT 0x0010
2036 #define NETDEV_UNREGISTER_FINAL 0x0011
2037 #define NETDEV_RELEASE 0x0012
2038 #define NETDEV_NOTIFY_PEERS 0x0013
2039 #define NETDEV_JOIN 0x0014
2040 #define NETDEV_CHANGEUPPER 0x0015
2041 #define NETDEV_RESEND_IGMP 0x0016
2042 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2043 #define NETDEV_CHANGEINFODATA 0x0018
2045 int register_netdevice_notifier(struct notifier_block
*nb
);
2046 int unregister_netdevice_notifier(struct notifier_block
*nb
);
2048 struct netdev_notifier_info
{
2049 struct net_device
*dev
;
2052 struct netdev_notifier_change_info
{
2053 struct netdev_notifier_info info
; /* must be first */
2054 unsigned int flags_changed
;
2057 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
2058 struct net_device
*dev
)
2063 static inline struct net_device
*
2064 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
2069 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
2072 extern rwlock_t dev_base_lock
; /* Device list lock */
2074 #define for_each_netdev(net, d) \
2075 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2076 #define for_each_netdev_reverse(net, d) \
2077 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2078 #define for_each_netdev_rcu(net, d) \
2079 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2080 #define for_each_netdev_safe(net, d, n) \
2081 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2082 #define for_each_netdev_continue(net, d) \
2083 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2084 #define for_each_netdev_continue_rcu(net, d) \
2085 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2086 #define for_each_netdev_in_bond_rcu(bond, slave) \
2087 for_each_netdev_rcu(&init_net, slave) \
2088 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2089 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2091 static inline struct net_device
*next_net_device(struct net_device
*dev
)
2093 struct list_head
*lh
;
2097 lh
= dev
->dev_list
.next
;
2098 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2101 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
2103 struct list_head
*lh
;
2107 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
2108 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2111 static inline struct net_device
*first_net_device(struct net
*net
)
2113 return list_empty(&net
->dev_base_head
) ? NULL
:
2114 net_device_entry(net
->dev_base_head
.next
);
2117 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
2119 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
2121 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2124 int netdev_boot_setup_check(struct net_device
*dev
);
2125 unsigned long netdev_boot_base(const char *prefix
, int unit
);
2126 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
2127 const char *hwaddr
);
2128 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2129 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2130 void dev_add_pack(struct packet_type
*pt
);
2131 void dev_remove_pack(struct packet_type
*pt
);
2132 void __dev_remove_pack(struct packet_type
*pt
);
2133 void dev_add_offload(struct packet_offload
*po
);
2134 void dev_remove_offload(struct packet_offload
*po
);
2136 struct net_device
*__dev_get_by_flags(struct net
*net
, unsigned short flags
,
2137 unsigned short mask
);
2138 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
2139 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
2140 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
2141 int dev_alloc_name(struct net_device
*dev
, const char *name
);
2142 int dev_open(struct net_device
*dev
);
2143 int dev_close(struct net_device
*dev
);
2144 void dev_disable_lro(struct net_device
*dev
);
2145 int dev_loopback_xmit(struct sk_buff
*newskb
);
2146 int dev_queue_xmit(struct sk_buff
*skb
);
2147 int dev_queue_xmit_accel(struct sk_buff
*skb
, void *accel_priv
);
2148 int register_netdevice(struct net_device
*dev
);
2149 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
2150 void unregister_netdevice_many(struct list_head
*head
);
2151 static inline void unregister_netdevice(struct net_device
*dev
)
2153 unregister_netdevice_queue(dev
, NULL
);
2156 int netdev_refcnt_read(const struct net_device
*dev
);
2157 void free_netdev(struct net_device
*dev
);
2158 void netdev_freemem(struct net_device
*dev
);
2159 void synchronize_net(void);
2160 int init_dummy_netdev(struct net_device
*dev
);
2162 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
2163 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
2164 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
2165 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
2166 int dev_restart(struct net_device
*dev
);
2167 int skb_gro_receive(struct sk_buff
**head
, struct sk_buff
*skb
);
2169 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
2171 return NAPI_GRO_CB(skb
)->data_offset
;
2174 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
2176 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
2179 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
2181 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2184 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2185 unsigned int offset
)
2187 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2190 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2192 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2195 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2196 unsigned int offset
)
2198 if (!pskb_may_pull(skb
, hlen
))
2201 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2202 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2203 return skb
->data
+ offset
;
2206 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2208 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2209 skb_network_offset(skb
);
2212 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2213 const void *start
, unsigned int len
)
2215 if (NAPI_GRO_CB(skb
)->csum_valid
)
2216 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2217 csum_partial(start
, len
, 0));
2220 /* GRO checksum functions. These are logical equivalents of the normal
2221 * checksum functions (in skbuff.h) except that they operate on the GRO
2222 * offsets and fields in sk_buff.
2225 __sum16
__skb_gro_checksum_complete(struct sk_buff
*skb
);
2227 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff
*skb
,
2231 return (skb
->ip_summed
!= CHECKSUM_PARTIAL
&&
2232 NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2233 (!zero_okay
|| check
));
2236 static inline __sum16
__skb_gro_checksum_validate_complete(struct sk_buff
*skb
,
2239 if (NAPI_GRO_CB(skb
)->csum_valid
&&
2240 !csum_fold(csum_add(psum
, NAPI_GRO_CB(skb
)->csum
)))
2243 NAPI_GRO_CB(skb
)->csum
= psum
;
2245 return __skb_gro_checksum_complete(skb
);
2248 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff
*skb
)
2250 if (NAPI_GRO_CB(skb
)->csum_cnt
> 0) {
2251 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2252 NAPI_GRO_CB(skb
)->csum_cnt
--;
2254 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2255 * verified a new top level checksum or an encapsulated one
2256 * during GRO. This saves work if we fallback to normal path.
2258 __skb_incr_checksum_unnecessary(skb
);
2262 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2265 __sum16 __ret = 0; \
2266 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2267 __ret = __skb_gro_checksum_validate_complete(skb, \
2268 compute_pseudo(skb, proto)); \
2270 __skb_mark_checksum_bad(skb); \
2272 skb_gro_incr_csum_unnecessary(skb); \
2276 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2277 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2279 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2281 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2283 #define skb_gro_checksum_simple_validate(skb) \
2284 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2286 static inline bool __skb_gro_checksum_convert_check(struct sk_buff
*skb
)
2288 return (NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2289 !NAPI_GRO_CB(skb
)->csum_valid
);
2292 static inline void __skb_gro_checksum_convert(struct sk_buff
*skb
,
2293 __sum16 check
, __wsum pseudo
)
2295 NAPI_GRO_CB(skb
)->csum
= ~pseudo
;
2296 NAPI_GRO_CB(skb
)->csum_valid
= 1;
2299 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2301 if (__skb_gro_checksum_convert_check(skb)) \
2302 __skb_gro_checksum_convert(skb, check, \
2303 compute_pseudo(skb, proto)); \
2306 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2307 unsigned short type
,
2308 const void *daddr
, const void *saddr
,
2311 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2314 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2317 static inline int dev_parse_header(const struct sk_buff
*skb
,
2318 unsigned char *haddr
)
2320 const struct net_device
*dev
= skb
->dev
;
2322 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2324 return dev
->header_ops
->parse(skb
, haddr
);
2327 static inline int dev_rebuild_header(struct sk_buff
*skb
)
2329 const struct net_device
*dev
= skb
->dev
;
2331 if (!dev
->header_ops
|| !dev
->header_ops
->rebuild
)
2333 return dev
->header_ops
->rebuild(skb
);
2336 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
2337 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2338 static inline int unregister_gifconf(unsigned int family
)
2340 return register_gifconf(family
, NULL
);
2343 #ifdef CONFIG_NET_FLOW_LIMIT
2344 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2345 struct sd_flow_limit
{
2347 unsigned int num_buckets
;
2348 unsigned int history_head
;
2349 u16 history
[FLOW_LIMIT_HISTORY
];
2353 extern int netdev_flow_limit_table_len
;
2354 #endif /* CONFIG_NET_FLOW_LIMIT */
2357 * Incoming packets are placed on per-cpu queues
2359 struct softnet_data
{
2360 struct list_head poll_list
;
2361 struct sk_buff_head process_queue
;
2364 unsigned int processed
;
2365 unsigned int time_squeeze
;
2366 unsigned int cpu_collision
;
2367 unsigned int received_rps
;
2369 struct softnet_data
*rps_ipi_list
;
2371 #ifdef CONFIG_NET_FLOW_LIMIT
2372 struct sd_flow_limit __rcu
*flow_limit
;
2374 struct Qdisc
*output_queue
;
2375 struct Qdisc
**output_queue_tailp
;
2376 struct sk_buff
*completion_queue
;
2379 /* Elements below can be accessed between CPUs for RPS */
2380 struct call_single_data csd ____cacheline_aligned_in_smp
;
2381 struct softnet_data
*rps_ipi_next
;
2383 unsigned int input_queue_head
;
2384 unsigned int input_queue_tail
;
2386 unsigned int dropped
;
2387 struct sk_buff_head input_pkt_queue
;
2388 struct napi_struct backlog
;
2392 static inline void input_queue_head_incr(struct softnet_data
*sd
)
2395 sd
->input_queue_head
++;
2399 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
2400 unsigned int *qtail
)
2403 *qtail
= ++sd
->input_queue_tail
;
2407 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
2409 void __netif_schedule(struct Qdisc
*q
);
2410 void netif_schedule_queue(struct netdev_queue
*txq
);
2412 static inline void netif_tx_schedule_all(struct net_device
*dev
)
2416 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2417 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
2420 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
2422 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2426 * netif_start_queue - allow transmit
2427 * @dev: network device
2429 * Allow upper layers to call the device hard_start_xmit routine.
2431 static inline void netif_start_queue(struct net_device
*dev
)
2433 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
2436 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
2440 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2441 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2442 netif_tx_start_queue(txq
);
2446 void netif_tx_wake_queue(struct netdev_queue
*dev_queue
);
2449 * netif_wake_queue - restart transmit
2450 * @dev: network device
2452 * Allow upper layers to call the device hard_start_xmit routine.
2453 * Used for flow control when transmit resources are available.
2455 static inline void netif_wake_queue(struct net_device
*dev
)
2457 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
2460 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
2464 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2465 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2466 netif_tx_wake_queue(txq
);
2470 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
2472 if (WARN_ON(!dev_queue
)) {
2473 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
2476 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2480 * netif_stop_queue - stop transmitted packets
2481 * @dev: network device
2483 * Stop upper layers calling the device hard_start_xmit routine.
2484 * Used for flow control when transmit resources are unavailable.
2486 static inline void netif_stop_queue(struct net_device
*dev
)
2488 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2491 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
2495 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2496 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2497 netif_tx_stop_queue(txq
);
2501 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2503 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2507 * netif_queue_stopped - test if transmit queue is flowblocked
2508 * @dev: network device
2510 * Test if transmit queue on device is currently unable to send.
2512 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2514 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2517 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2519 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2523 netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2525 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2529 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue
*dev_queue
)
2531 return dev_queue
->state
& QUEUE_STATE_DRV_XOFF_OR_FROZEN
;
2535 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2536 * @dev_queue: pointer to transmit queue
2538 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2539 * to give appropriate hint to the cpu.
2541 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue
*dev_queue
)
2544 prefetchw(&dev_queue
->dql
.num_queued
);
2549 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2550 * @dev_queue: pointer to transmit queue
2552 * BQL enabled drivers might use this helper in their TX completion path,
2553 * to give appropriate hint to the cpu.
2555 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue
*dev_queue
)
2558 prefetchw(&dev_queue
->dql
.limit
);
2562 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2566 dql_queued(&dev_queue
->dql
, bytes
);
2568 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2571 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2574 * The XOFF flag must be set before checking the dql_avail below,
2575 * because in netdev_tx_completed_queue we update the dql_completed
2576 * before checking the XOFF flag.
2580 /* check again in case another CPU has just made room avail */
2581 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2582 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2587 * netdev_sent_queue - report the number of bytes queued to hardware
2588 * @dev: network device
2589 * @bytes: number of bytes queued to the hardware device queue
2591 * Report the number of bytes queued for sending/completion to the network
2592 * device hardware queue. @bytes should be a good approximation and should
2593 * exactly match netdev_completed_queue() @bytes
2595 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2597 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2600 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2601 unsigned int pkts
, unsigned int bytes
)
2604 if (unlikely(!bytes
))
2607 dql_completed(&dev_queue
->dql
, bytes
);
2610 * Without the memory barrier there is a small possiblity that
2611 * netdev_tx_sent_queue will miss the update and cause the queue to
2612 * be stopped forever
2616 if (dql_avail(&dev_queue
->dql
) < 0)
2619 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2620 netif_schedule_queue(dev_queue
);
2625 * netdev_completed_queue - report bytes and packets completed by device
2626 * @dev: network device
2627 * @pkts: actual number of packets sent over the medium
2628 * @bytes: actual number of bytes sent over the medium
2630 * Report the number of bytes and packets transmitted by the network device
2631 * hardware queue over the physical medium, @bytes must exactly match the
2632 * @bytes amount passed to netdev_sent_queue()
2634 static inline void netdev_completed_queue(struct net_device
*dev
,
2635 unsigned int pkts
, unsigned int bytes
)
2637 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2640 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2643 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2649 * netdev_reset_queue - reset the packets and bytes count of a network device
2650 * @dev_queue: network device
2652 * Reset the bytes and packet count of a network device and clear the
2653 * software flow control OFF bit for this network device
2655 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2657 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2661 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2662 * @dev: network device
2663 * @queue_index: given tx queue index
2665 * Returns 0 if given tx queue index >= number of device tx queues,
2666 * otherwise returns the originally passed tx queue index.
2668 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
2670 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
2671 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2672 dev
->name
, queue_index
,
2673 dev
->real_num_tx_queues
);
2681 * netif_running - test if up
2682 * @dev: network device
2684 * Test if the device has been brought up.
2686 static inline bool netif_running(const struct net_device
*dev
)
2688 return test_bit(__LINK_STATE_START
, &dev
->state
);
2692 * Routines to manage the subqueues on a device. We only need start
2693 * stop, and a check if it's stopped. All other device management is
2694 * done at the overall netdevice level.
2695 * Also test the device if we're multiqueue.
2699 * netif_start_subqueue - allow sending packets on subqueue
2700 * @dev: network device
2701 * @queue_index: sub queue index
2703 * Start individual transmit queue of a device with multiple transmit queues.
2705 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2707 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2709 netif_tx_start_queue(txq
);
2713 * netif_stop_subqueue - stop sending packets on subqueue
2714 * @dev: network device
2715 * @queue_index: sub queue index
2717 * Stop individual transmit queue of a device with multiple transmit queues.
2719 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2721 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2722 netif_tx_stop_queue(txq
);
2726 * netif_subqueue_stopped - test status of subqueue
2727 * @dev: network device
2728 * @queue_index: sub queue index
2730 * Check individual transmit queue of a device with multiple transmit queues.
2732 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2735 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2737 return netif_tx_queue_stopped(txq
);
2740 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2741 struct sk_buff
*skb
)
2743 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2746 void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
);
2749 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
2752 static inline int netif_set_xps_queue(struct net_device
*dev
,
2753 const struct cpumask
*mask
,
2761 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2762 * as a distribution range limit for the returned value.
2764 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2765 struct sk_buff
*skb
)
2767 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2771 * netif_is_multiqueue - test if device has multiple transmit queues
2772 * @dev: network device
2774 * Check if device has multiple transmit queues
2776 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2778 return dev
->num_tx_queues
> 1;
2781 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
2784 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
2786 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2794 static inline unsigned int get_netdev_rx_queue_index(
2795 struct netdev_rx_queue
*queue
)
2797 struct net_device
*dev
= queue
->dev
;
2798 int index
= queue
- dev
->_rx
;
2800 BUG_ON(index
>= dev
->num_rx_queues
);
2805 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2806 int netif_get_num_default_rss_queues(void);
2808 enum skb_free_reason
{
2809 SKB_REASON_CONSUMED
,
2813 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
2814 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
2817 * It is not allowed to call kfree_skb() or consume_skb() from hardware
2818 * interrupt context or with hardware interrupts being disabled.
2819 * (in_irq() || irqs_disabled())
2821 * We provide four helpers that can be used in following contexts :
2823 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
2824 * replacing kfree_skb(skb)
2826 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
2827 * Typically used in place of consume_skb(skb) in TX completion path
2829 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
2830 * replacing kfree_skb(skb)
2832 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
2833 * and consumed a packet. Used in place of consume_skb(skb)
2835 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
2837 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
2840 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
2842 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
2845 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
2847 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
2850 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
2852 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
2855 int netif_rx(struct sk_buff
*skb
);
2856 int netif_rx_ni(struct sk_buff
*skb
);
2857 int netif_receive_skb(struct sk_buff
*skb
);
2858 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
2859 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2860 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
2861 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2862 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
2863 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
2865 static inline void napi_free_frags(struct napi_struct
*napi
)
2867 kfree_skb(napi
->skb
);
2871 int netdev_rx_handler_register(struct net_device
*dev
,
2872 rx_handler_func_t
*rx_handler
,
2873 void *rx_handler_data
);
2874 void netdev_rx_handler_unregister(struct net_device
*dev
);
2876 bool dev_valid_name(const char *name
);
2877 int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2878 int dev_ethtool(struct net
*net
, struct ifreq
*);
2879 unsigned int dev_get_flags(const struct net_device
*);
2880 int __dev_change_flags(struct net_device
*, unsigned int flags
);
2881 int dev_change_flags(struct net_device
*, unsigned int);
2882 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
2883 unsigned int gchanges
);
2884 int dev_change_name(struct net_device
*, const char *);
2885 int dev_set_alias(struct net_device
*, const char *, size_t);
2886 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
2887 int dev_set_mtu(struct net_device
*, int);
2888 void dev_set_group(struct net_device
*, int);
2889 int dev_set_mac_address(struct net_device
*, struct sockaddr
*);
2890 int dev_change_carrier(struct net_device
*, bool new_carrier
);
2891 int dev_get_phys_port_id(struct net_device
*dev
,
2892 struct netdev_phys_item_id
*ppid
);
2893 struct sk_buff
*validate_xmit_skb_list(struct sk_buff
*skb
, struct net_device
*dev
);
2894 struct sk_buff
*dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
2895 struct netdev_queue
*txq
, int *ret
);
2896 int __dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
2897 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
2898 bool is_skb_forwardable(struct net_device
*dev
, struct sk_buff
*skb
);
2900 extern int netdev_budget
;
2902 /* Called by rtnetlink.c:rtnl_unlock() */
2903 void netdev_run_todo(void);
2906 * dev_put - release reference to device
2907 * @dev: network device
2909 * Release reference to device to allow it to be freed.
2911 static inline void dev_put(struct net_device
*dev
)
2913 this_cpu_dec(*dev
->pcpu_refcnt
);
2917 * dev_hold - get reference to device
2918 * @dev: network device
2920 * Hold reference to device to keep it from being freed.
2922 static inline void dev_hold(struct net_device
*dev
)
2924 this_cpu_inc(*dev
->pcpu_refcnt
);
2927 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2928 * and _off may be called from IRQ context, but it is caller
2929 * who is responsible for serialization of these calls.
2931 * The name carrier is inappropriate, these functions should really be
2932 * called netif_lowerlayer_*() because they represent the state of any
2933 * kind of lower layer not just hardware media.
2936 void linkwatch_init_dev(struct net_device
*dev
);
2937 void linkwatch_fire_event(struct net_device
*dev
);
2938 void linkwatch_forget_dev(struct net_device
*dev
);
2941 * netif_carrier_ok - test if carrier present
2942 * @dev: network device
2944 * Check if carrier is present on device
2946 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2948 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2951 unsigned long dev_trans_start(struct net_device
*dev
);
2953 void __netdev_watchdog_up(struct net_device
*dev
);
2955 void netif_carrier_on(struct net_device
*dev
);
2957 void netif_carrier_off(struct net_device
*dev
);
2960 * netif_dormant_on - mark device as dormant.
2961 * @dev: network device
2963 * Mark device as dormant (as per RFC2863).
2965 * The dormant state indicates that the relevant interface is not
2966 * actually in a condition to pass packets (i.e., it is not 'up') but is
2967 * in a "pending" state, waiting for some external event. For "on-
2968 * demand" interfaces, this new state identifies the situation where the
2969 * interface is waiting for events to place it in the up state.
2972 static inline void netif_dormant_on(struct net_device
*dev
)
2974 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2975 linkwatch_fire_event(dev
);
2979 * netif_dormant_off - set device as not dormant.
2980 * @dev: network device
2982 * Device is not in dormant state.
2984 static inline void netif_dormant_off(struct net_device
*dev
)
2986 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2987 linkwatch_fire_event(dev
);
2991 * netif_dormant - test if carrier present
2992 * @dev: network device
2994 * Check if carrier is present on device
2996 static inline bool netif_dormant(const struct net_device
*dev
)
2998 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
3003 * netif_oper_up - test if device is operational
3004 * @dev: network device
3006 * Check if carrier is operational
3008 static inline bool netif_oper_up(const struct net_device
*dev
)
3010 return (dev
->operstate
== IF_OPER_UP
||
3011 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
3015 * netif_device_present - is device available or removed
3016 * @dev: network device
3018 * Check if device has not been removed from system.
3020 static inline bool netif_device_present(struct net_device
*dev
)
3022 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
3025 void netif_device_detach(struct net_device
*dev
);
3027 void netif_device_attach(struct net_device
*dev
);
3030 * Network interface message level settings
3034 NETIF_MSG_DRV
= 0x0001,
3035 NETIF_MSG_PROBE
= 0x0002,
3036 NETIF_MSG_LINK
= 0x0004,
3037 NETIF_MSG_TIMER
= 0x0008,
3038 NETIF_MSG_IFDOWN
= 0x0010,
3039 NETIF_MSG_IFUP
= 0x0020,
3040 NETIF_MSG_RX_ERR
= 0x0040,
3041 NETIF_MSG_TX_ERR
= 0x0080,
3042 NETIF_MSG_TX_QUEUED
= 0x0100,
3043 NETIF_MSG_INTR
= 0x0200,
3044 NETIF_MSG_TX_DONE
= 0x0400,
3045 NETIF_MSG_RX_STATUS
= 0x0800,
3046 NETIF_MSG_PKTDATA
= 0x1000,
3047 NETIF_MSG_HW
= 0x2000,
3048 NETIF_MSG_WOL
= 0x4000,
3051 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3052 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3053 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3054 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3055 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3056 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3057 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3058 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3059 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3060 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3061 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3062 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3063 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3064 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3065 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3067 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
3070 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
3071 return default_msg_enable_bits
;
3072 if (debug_value
== 0) /* no output */
3074 /* set low N bits */
3075 return (1 << debug_value
) - 1;
3078 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
3080 spin_lock(&txq
->_xmit_lock
);
3081 txq
->xmit_lock_owner
= cpu
;
3084 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
3086 spin_lock_bh(&txq
->_xmit_lock
);
3087 txq
->xmit_lock_owner
= smp_processor_id();
3090 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
3092 bool ok
= spin_trylock(&txq
->_xmit_lock
);
3094 txq
->xmit_lock_owner
= smp_processor_id();
3098 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
3100 txq
->xmit_lock_owner
= -1;
3101 spin_unlock(&txq
->_xmit_lock
);
3104 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
3106 txq
->xmit_lock_owner
= -1;
3107 spin_unlock_bh(&txq
->_xmit_lock
);
3110 static inline void txq_trans_update(struct netdev_queue
*txq
)
3112 if (txq
->xmit_lock_owner
!= -1)
3113 txq
->trans_start
= jiffies
;
3117 * netif_tx_lock - grab network device transmit lock
3118 * @dev: network device
3120 * Get network device transmit lock
3122 static inline void netif_tx_lock(struct net_device
*dev
)
3127 spin_lock(&dev
->tx_global_lock
);
3128 cpu
= smp_processor_id();
3129 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3130 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3132 /* We are the only thread of execution doing a
3133 * freeze, but we have to grab the _xmit_lock in
3134 * order to synchronize with threads which are in
3135 * the ->hard_start_xmit() handler and already
3136 * checked the frozen bit.
3138 __netif_tx_lock(txq
, cpu
);
3139 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3140 __netif_tx_unlock(txq
);
3144 static inline void netif_tx_lock_bh(struct net_device
*dev
)
3150 static inline void netif_tx_unlock(struct net_device
*dev
)
3154 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3155 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3157 /* No need to grab the _xmit_lock here. If the
3158 * queue is not stopped for another reason, we
3161 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3162 netif_schedule_queue(txq
);
3164 spin_unlock(&dev
->tx_global_lock
);
3167 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
3169 netif_tx_unlock(dev
);
3173 #define HARD_TX_LOCK(dev, txq, cpu) { \
3174 if ((dev->features & NETIF_F_LLTX) == 0) { \
3175 __netif_tx_lock(txq, cpu); \
3179 #define HARD_TX_TRYLOCK(dev, txq) \
3180 (((dev->features & NETIF_F_LLTX) == 0) ? \
3181 __netif_tx_trylock(txq) : \
3184 #define HARD_TX_UNLOCK(dev, txq) { \
3185 if ((dev->features & NETIF_F_LLTX) == 0) { \
3186 __netif_tx_unlock(txq); \
3190 static inline void netif_tx_disable(struct net_device
*dev
)
3196 cpu
= smp_processor_id();
3197 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3198 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3200 __netif_tx_lock(txq
, cpu
);
3201 netif_tx_stop_queue(txq
);
3202 __netif_tx_unlock(txq
);
3207 static inline void netif_addr_lock(struct net_device
*dev
)
3209 spin_lock(&dev
->addr_list_lock
);
3212 static inline void netif_addr_lock_nested(struct net_device
*dev
)
3214 int subclass
= SINGLE_DEPTH_NESTING
;
3216 if (dev
->netdev_ops
->ndo_get_lock_subclass
)
3217 subclass
= dev
->netdev_ops
->ndo_get_lock_subclass(dev
);
3219 spin_lock_nested(&dev
->addr_list_lock
, subclass
);
3222 static inline void netif_addr_lock_bh(struct net_device
*dev
)
3224 spin_lock_bh(&dev
->addr_list_lock
);
3227 static inline void netif_addr_unlock(struct net_device
*dev
)
3229 spin_unlock(&dev
->addr_list_lock
);
3232 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
3234 spin_unlock_bh(&dev
->addr_list_lock
);
3238 * dev_addrs walker. Should be used only for read access. Call with
3239 * rcu_read_lock held.
3241 #define for_each_dev_addr(dev, ha) \
3242 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3244 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3246 void ether_setup(struct net_device
*dev
);
3248 /* Support for loadable net-drivers */
3249 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
3250 unsigned char name_assign_type
,
3251 void (*setup
)(struct net_device
*),
3252 unsigned int txqs
, unsigned int rxqs
);
3253 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3254 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3256 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3257 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3260 int register_netdev(struct net_device
*dev
);
3261 void unregister_netdev(struct net_device
*dev
);
3263 /* General hardware address lists handling functions */
3264 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
3265 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3266 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
3267 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3268 int __hw_addr_sync_dev(struct netdev_hw_addr_list
*list
,
3269 struct net_device
*dev
,
3270 int (*sync
)(struct net_device
*, const unsigned char *),
3271 int (*unsync
)(struct net_device
*,
3272 const unsigned char *));
3273 void __hw_addr_unsync_dev(struct netdev_hw_addr_list
*list
,
3274 struct net_device
*dev
,
3275 int (*unsync
)(struct net_device
*,
3276 const unsigned char *));
3277 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
3279 /* Functions used for device addresses handling */
3280 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
3281 unsigned char addr_type
);
3282 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
3283 unsigned char addr_type
);
3284 void dev_addr_flush(struct net_device
*dev
);
3285 int dev_addr_init(struct net_device
*dev
);
3287 /* Functions used for unicast addresses handling */
3288 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
3289 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3290 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
3291 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
3292 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3293 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
3294 void dev_uc_flush(struct net_device
*dev
);
3295 void dev_uc_init(struct net_device
*dev
);
3298 * __dev_uc_sync - Synchonize device's unicast list
3299 * @dev: device to sync
3300 * @sync: function to call if address should be added
3301 * @unsync: function to call if address should be removed
3303 * Add newly added addresses to the interface, and release
3304 * addresses that have been deleted.
3306 static inline int __dev_uc_sync(struct net_device
*dev
,
3307 int (*sync
)(struct net_device
*,
3308 const unsigned char *),
3309 int (*unsync
)(struct net_device
*,
3310 const unsigned char *))
3312 return __hw_addr_sync_dev(&dev
->uc
, dev
, sync
, unsync
);
3316 * __dev_uc_unsync - Remove synchronized addresses from device
3317 * @dev: device to sync
3318 * @unsync: function to call if address should be removed
3320 * Remove all addresses that were added to the device by dev_uc_sync().
3322 static inline void __dev_uc_unsync(struct net_device
*dev
,
3323 int (*unsync
)(struct net_device
*,
3324 const unsigned char *))
3326 __hw_addr_unsync_dev(&dev
->uc
, dev
, unsync
);
3329 /* Functions used for multicast addresses handling */
3330 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
3331 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
3332 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3333 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
3334 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
3335 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
3336 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3337 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
3338 void dev_mc_flush(struct net_device
*dev
);
3339 void dev_mc_init(struct net_device
*dev
);
3342 * __dev_mc_sync - Synchonize device's multicast list
3343 * @dev: device to sync
3344 * @sync: function to call if address should be added
3345 * @unsync: function to call if address should be removed
3347 * Add newly added addresses to the interface, and release
3348 * addresses that have been deleted.
3350 static inline int __dev_mc_sync(struct net_device
*dev
,
3351 int (*sync
)(struct net_device
*,
3352 const unsigned char *),
3353 int (*unsync
)(struct net_device
*,
3354 const unsigned char *))
3356 return __hw_addr_sync_dev(&dev
->mc
, dev
, sync
, unsync
);
3360 * __dev_mc_unsync - Remove synchronized addresses from device
3361 * @dev: device to sync
3362 * @unsync: function to call if address should be removed
3364 * Remove all addresses that were added to the device by dev_mc_sync().
3366 static inline void __dev_mc_unsync(struct net_device
*dev
,
3367 int (*unsync
)(struct net_device
*,
3368 const unsigned char *))
3370 __hw_addr_unsync_dev(&dev
->mc
, dev
, unsync
);
3373 /* Functions used for secondary unicast and multicast support */
3374 void dev_set_rx_mode(struct net_device
*dev
);
3375 void __dev_set_rx_mode(struct net_device
*dev
);
3376 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
3377 int dev_set_allmulti(struct net_device
*dev
, int inc
);
3378 void netdev_state_change(struct net_device
*dev
);
3379 void netdev_notify_peers(struct net_device
*dev
);
3380 void netdev_features_change(struct net_device
*dev
);
3381 /* Load a device via the kmod */
3382 void dev_load(struct net
*net
, const char *name
);
3383 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
3384 struct rtnl_link_stats64
*storage
);
3385 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
3386 const struct net_device_stats
*netdev_stats
);
3388 extern int netdev_max_backlog
;
3389 extern int netdev_tstamp_prequeue
;
3390 extern int weight_p
;
3391 extern int bpf_jit_enable
;
3393 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
3394 struct net_device
*netdev_upper_get_next_dev_rcu(struct net_device
*dev
,
3395 struct list_head
**iter
);
3396 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
3397 struct list_head
**iter
);
3399 /* iterate through upper list, must be called under RCU read lock */
3400 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3401 for (iter = &(dev)->adj_list.upper, \
3402 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3404 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3406 /* iterate through upper list, must be called under RCU read lock */
3407 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3408 for (iter = &(dev)->all_adj_list.upper, \
3409 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3411 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3413 void *netdev_lower_get_next_private(struct net_device
*dev
,
3414 struct list_head
**iter
);
3415 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
3416 struct list_head
**iter
);
3418 #define netdev_for_each_lower_private(dev, priv, iter) \
3419 for (iter = (dev)->adj_list.lower.next, \
3420 priv = netdev_lower_get_next_private(dev, &(iter)); \
3422 priv = netdev_lower_get_next_private(dev, &(iter)))
3424 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3425 for (iter = &(dev)->adj_list.lower, \
3426 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3428 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3430 void *netdev_lower_get_next(struct net_device
*dev
,
3431 struct list_head
**iter
);
3432 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3433 for (iter = &(dev)->adj_list.lower, \
3434 ldev = netdev_lower_get_next(dev, &(iter)); \
3436 ldev = netdev_lower_get_next(dev, &(iter)))
3438 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
3439 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
3440 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
3441 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
3442 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
);
3443 int netdev_master_upper_dev_link(struct net_device
*dev
,
3444 struct net_device
*upper_dev
);
3445 int netdev_master_upper_dev_link_private(struct net_device
*dev
,
3446 struct net_device
*upper_dev
,
3448 void netdev_upper_dev_unlink(struct net_device
*dev
,
3449 struct net_device
*upper_dev
);
3450 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
3451 void *netdev_lower_dev_get_private(struct net_device
*dev
,
3452 struct net_device
*lower_dev
);
3454 /* RSS keys are 40 or 52 bytes long */
3455 #define NETDEV_RSS_KEY_LEN 52
3456 extern u8 netdev_rss_key
[NETDEV_RSS_KEY_LEN
];
3457 void netdev_rss_key_fill(void *buffer
, size_t len
);
3459 int dev_get_nest_level(struct net_device
*dev
,
3460 bool (*type_check
)(struct net_device
*dev
));
3461 int skb_checksum_help(struct sk_buff
*skb
);
3462 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
3463 netdev_features_t features
, bool tx_path
);
3464 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
3465 netdev_features_t features
);
3468 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
3470 return __skb_gso_segment(skb
, features
, true);
3472 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
3474 static inline bool can_checksum_protocol(netdev_features_t features
,
3477 return ((features
& NETIF_F_GEN_CSUM
) ||
3478 ((features
& NETIF_F_V4_CSUM
) &&
3479 protocol
== htons(ETH_P_IP
)) ||
3480 ((features
& NETIF_F_V6_CSUM
) &&
3481 protocol
== htons(ETH_P_IPV6
)) ||
3482 ((features
& NETIF_F_FCOE_CRC
) &&
3483 protocol
== htons(ETH_P_FCOE
)));
3487 void netdev_rx_csum_fault(struct net_device
*dev
);
3489 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
3493 /* rx skb timestamps */
3494 void net_enable_timestamp(void);
3495 void net_disable_timestamp(void);
3497 #ifdef CONFIG_PROC_FS
3498 int __init
dev_proc_init(void);
3500 #define dev_proc_init() 0
3503 static inline netdev_tx_t
__netdev_start_xmit(const struct net_device_ops
*ops
,
3504 struct sk_buff
*skb
, struct net_device
*dev
,
3507 skb
->xmit_more
= more
? 1 : 0;
3508 return ops
->ndo_start_xmit(skb
, dev
);
3511 static inline netdev_tx_t
netdev_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
3512 struct netdev_queue
*txq
, bool more
)
3514 const struct net_device_ops
*ops
= dev
->netdev_ops
;
3517 rc
= __netdev_start_xmit(ops
, skb
, dev
, more
);
3518 if (rc
== NETDEV_TX_OK
)
3519 txq_trans_update(txq
);
3524 int netdev_class_create_file_ns(struct class_attribute
*class_attr
,
3526 void netdev_class_remove_file_ns(struct class_attribute
*class_attr
,
3529 static inline int netdev_class_create_file(struct class_attribute
*class_attr
)
3531 return netdev_class_create_file_ns(class_attr
, NULL
);
3534 static inline void netdev_class_remove_file(struct class_attribute
*class_attr
)
3536 netdev_class_remove_file_ns(class_attr
, NULL
);
3539 extern struct kobj_ns_type_operations net_ns_type_operations
;
3541 const char *netdev_drivername(const struct net_device
*dev
);
3543 void linkwatch_run_queue(void);
3545 static inline netdev_features_t
netdev_intersect_features(netdev_features_t f1
,
3546 netdev_features_t f2
)
3548 if (f1
& NETIF_F_GEN_CSUM
)
3549 f1
|= (NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3550 if (f2
& NETIF_F_GEN_CSUM
)
3551 f2
|= (NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3553 if (f1
& NETIF_F_GEN_CSUM
)
3554 f1
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3559 static inline netdev_features_t
netdev_get_wanted_features(
3560 struct net_device
*dev
)
3562 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
3564 netdev_features_t
netdev_increment_features(netdev_features_t all
,
3565 netdev_features_t one
, netdev_features_t mask
);
3567 /* Allow TSO being used on stacked device :
3568 * Performing the GSO segmentation before last device
3569 * is a performance improvement.
3571 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
3572 netdev_features_t mask
)
3574 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
3577 int __netdev_update_features(struct net_device
*dev
);
3578 void netdev_update_features(struct net_device
*dev
);
3579 void netdev_change_features(struct net_device
*dev
);
3581 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
3582 struct net_device
*dev
);
3584 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
3586 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
3588 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
3590 /* check flags correspondence */
3591 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
3592 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
3593 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
3594 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
3595 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
3596 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
3597 BUILD_BUG_ON(SKB_GSO_GRE
!= (NETIF_F_GSO_GRE
>> NETIF_F_GSO_SHIFT
));
3598 BUILD_BUG_ON(SKB_GSO_GRE_CSUM
!= (NETIF_F_GSO_GRE_CSUM
>> NETIF_F_GSO_SHIFT
));
3599 BUILD_BUG_ON(SKB_GSO_IPIP
!= (NETIF_F_GSO_IPIP
>> NETIF_F_GSO_SHIFT
));
3600 BUILD_BUG_ON(SKB_GSO_SIT
!= (NETIF_F_GSO_SIT
>> NETIF_F_GSO_SHIFT
));
3601 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL
!= (NETIF_F_GSO_UDP_TUNNEL
>> NETIF_F_GSO_SHIFT
));
3602 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM
!= (NETIF_F_GSO_UDP_TUNNEL_CSUM
>> NETIF_F_GSO_SHIFT
));
3603 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM
!= (NETIF_F_GSO_TUNNEL_REMCSUM
>> NETIF_F_GSO_SHIFT
));
3605 return (features
& feature
) == feature
;
3608 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
3610 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
3611 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
3614 static inline bool netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
,
3615 netdev_features_t features
)
3617 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
3618 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
3619 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
3622 static inline void netif_set_gso_max_size(struct net_device
*dev
,
3625 dev
->gso_max_size
= size
;
3628 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
3629 int pulled_hlen
, u16 mac_offset
,
3632 skb
->protocol
= protocol
;
3633 skb
->encapsulation
= 1;
3634 skb_push(skb
, pulled_hlen
);
3635 skb_reset_transport_header(skb
);
3636 skb
->mac_header
= mac_offset
;
3637 skb
->network_header
= skb
->mac_header
+ mac_len
;
3638 skb
->mac_len
= mac_len
;
3641 static inline bool netif_is_macvlan(struct net_device
*dev
)
3643 return dev
->priv_flags
& IFF_MACVLAN
;
3646 static inline bool netif_is_macvlan_port(struct net_device
*dev
)
3648 return dev
->priv_flags
& IFF_MACVLAN_PORT
;
3651 static inline bool netif_is_ipvlan(struct net_device
*dev
)
3653 return dev
->priv_flags
& IFF_IPVLAN_SLAVE
;
3656 static inline bool netif_is_ipvlan_port(struct net_device
*dev
)
3658 return dev
->priv_flags
& IFF_IPVLAN_MASTER
;
3661 static inline bool netif_is_bond_master(struct net_device
*dev
)
3663 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
3666 static inline bool netif_is_bond_slave(struct net_device
*dev
)
3668 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
3671 static inline bool netif_supports_nofcs(struct net_device
*dev
)
3673 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
3676 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
3677 static inline void netif_keep_dst(struct net_device
*dev
)
3679 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
);
3682 extern struct pernet_operations __net_initdata loopback_net_ops
;
3684 /* Logging, debugging and troubleshooting/diagnostic helpers. */
3686 /* netdev_printk helpers, similar to dev_printk */
3688 static inline const char *netdev_name(const struct net_device
*dev
)
3690 if (!dev
->name
[0] || strchr(dev
->name
, '%'))
3691 return "(unnamed net_device)";
3695 static inline const char *netdev_reg_state(const struct net_device
*dev
)
3697 switch (dev
->reg_state
) {
3698 case NETREG_UNINITIALIZED
: return " (uninitialized)";
3699 case NETREG_REGISTERED
: return "";
3700 case NETREG_UNREGISTERING
: return " (unregistering)";
3701 case NETREG_UNREGISTERED
: return " (unregistered)";
3702 case NETREG_RELEASED
: return " (released)";
3703 case NETREG_DUMMY
: return " (dummy)";
3706 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev
->name
, dev
->reg_state
);
3707 return " (unknown)";
3711 void netdev_printk(const char *level
, const struct net_device
*dev
,
3712 const char *format
, ...);
3714 void netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
3716 void netdev_alert(const struct net_device
*dev
, const char *format
, ...);
3718 void netdev_crit(const struct net_device
*dev
, const char *format
, ...);
3720 void netdev_err(const struct net_device
*dev
, const char *format
, ...);
3722 void netdev_warn(const struct net_device
*dev
, const char *format
, ...);
3724 void netdev_notice(const struct net_device
*dev
, const char *format
, ...);
3726 void netdev_info(const struct net_device
*dev
, const char *format
, ...);
3728 #define MODULE_ALIAS_NETDEV(device) \
3729 MODULE_ALIAS("netdev-" device)
3731 #if defined(CONFIG_DYNAMIC_DEBUG)
3732 #define netdev_dbg(__dev, format, args...) \
3734 dynamic_netdev_dbg(__dev, format, ##args); \
3736 #elif defined(DEBUG)
3737 #define netdev_dbg(__dev, format, args...) \
3738 netdev_printk(KERN_DEBUG, __dev, format, ##args)
3740 #define netdev_dbg(__dev, format, args...) \
3743 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
3747 #if defined(VERBOSE_DEBUG)
3748 #define netdev_vdbg netdev_dbg
3751 #define netdev_vdbg(dev, format, args...) \
3754 netdev_printk(KERN_DEBUG, dev, format, ##args); \
3760 * netdev_WARN() acts like dev_printk(), but with the key difference
3761 * of using a WARN/WARN_ON to get the message out, including the
3762 * file/line information and a backtrace.
3764 #define netdev_WARN(dev, format, args...) \
3765 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
3766 netdev_reg_state(dev), ##args)
3768 /* netif printk helpers, similar to netdev_printk */
3770 #define netif_printk(priv, type, level, dev, fmt, args...) \
3772 if (netif_msg_##type(priv)) \
3773 netdev_printk(level, (dev), fmt, ##args); \
3776 #define netif_level(level, priv, type, dev, fmt, args...) \
3778 if (netif_msg_##type(priv)) \
3779 netdev_##level(dev, fmt, ##args); \
3782 #define netif_emerg(priv, type, dev, fmt, args...) \
3783 netif_level(emerg, priv, type, dev, fmt, ##args)
3784 #define netif_alert(priv, type, dev, fmt, args...) \
3785 netif_level(alert, priv, type, dev, fmt, ##args)
3786 #define netif_crit(priv, type, dev, fmt, args...) \
3787 netif_level(crit, priv, type, dev, fmt, ##args)
3788 #define netif_err(priv, type, dev, fmt, args...) \
3789 netif_level(err, priv, type, dev, fmt, ##args)
3790 #define netif_warn(priv, type, dev, fmt, args...) \
3791 netif_level(warn, priv, type, dev, fmt, ##args)
3792 #define netif_notice(priv, type, dev, fmt, args...) \
3793 netif_level(notice, priv, type, dev, fmt, ##args)
3794 #define netif_info(priv, type, dev, fmt, args...) \
3795 netif_level(info, priv, type, dev, fmt, ##args)
3797 #if defined(CONFIG_DYNAMIC_DEBUG)
3798 #define netif_dbg(priv, type, netdev, format, args...) \
3800 if (netif_msg_##type(priv)) \
3801 dynamic_netdev_dbg(netdev, format, ##args); \
3803 #elif defined(DEBUG)
3804 #define netif_dbg(priv, type, dev, format, args...) \
3805 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3807 #define netif_dbg(priv, type, dev, format, args...) \
3810 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3815 #if defined(VERBOSE_DEBUG)
3816 #define netif_vdbg netif_dbg
3818 #define netif_vdbg(priv, type, dev, format, args...) \
3821 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3827 * The list of packet types we will receive (as opposed to discard)
3828 * and the routines to invoke.
3830 * Why 16. Because with 16 the only overlap we get on a hash of the
3831 * low nibble of the protocol value is RARP/SNAP/X.25.
3833 * NOTE: That is no longer true with the addition of VLAN tags. Not
3834 * sure which should go first, but I bet it won't make much
3835 * difference if we are running VLANs. The good news is that
3836 * this protocol won't be in the list unless compiled in, so
3837 * the average user (w/out VLANs) will not be adversely affected.
3853 #define PTYPE_HASH_SIZE (16)
3854 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3856 #endif /* _LINUX_NETDEVICE_H */