2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/timer.h>
29 #include <linux/bug.h>
30 #include <linux/delay.h>
31 #include <linux/atomic.h>
32 #include <linux/prefetch.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/workqueue.h>
39 #include <linux/dynamic_queue_limits.h>
41 #include <linux/ethtool.h>
42 #include <net/net_namespace.h>
44 #include <net/dcbnl.h>
46 #include <net/netprio_cgroup.h>
48 #include <linux/netdev_features.h>
49 #include <linux/neighbour.h>
50 #include <uapi/linux/netdevice.h>
51 #include <uapi/linux/if_bonding.h>
52 #include <uapi/linux/pkt_cls.h>
53 #include <linux/hashtable.h>
62 /* 802.15.4 specific */
65 /* UDP Tunnel offloads */
66 struct udp_tunnel_info
;
70 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
71 const struct ethtool_ops
*ops
);
73 /* Backlog congestion levels */
74 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
75 #define NET_RX_DROP 1 /* packet dropped */
78 * Transmit return codes: transmit return codes originate from three different
81 * - qdisc return codes
82 * - driver transmit return codes
85 * Drivers are allowed to return any one of those in their hard_start_xmit()
86 * function. Real network devices commonly used with qdiscs should only return
87 * the driver transmit return codes though - when qdiscs are used, the actual
88 * transmission happens asynchronously, so the value is not propagated to
89 * higher layers. Virtual network devices transmit synchronously; in this case
90 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
91 * others are propagated to higher layers.
94 /* qdisc ->enqueue() return codes. */
95 #define NET_XMIT_SUCCESS 0x00
96 #define NET_XMIT_DROP 0x01 /* skb dropped */
97 #define NET_XMIT_CN 0x02 /* congestion notification */
98 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
100 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
101 * indicates that the device will soon be dropping packets, or already drops
102 * some packets of the same priority; prompting us to send less aggressively. */
103 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
104 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
106 /* Driver transmit return codes */
107 #define NETDEV_TX_MASK 0xf0
110 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
111 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
112 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
114 typedef enum netdev_tx netdev_tx_t
;
117 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
118 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
120 static inline bool dev_xmit_complete(int rc
)
123 * Positive cases with an skb consumed by a driver:
124 * - successful transmission (rc == NETDEV_TX_OK)
125 * - error while transmitting (rc < 0)
126 * - error while queueing to a different device (rc & NET_XMIT_MASK)
128 if (likely(rc
< NET_XMIT_MASK
))
135 * Compute the worst-case header length according to the protocols
139 #if defined(CONFIG_HYPERV_NET)
140 # define LL_MAX_HEADER 128
141 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
148 # define LL_MAX_HEADER 32
151 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
152 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
153 #define MAX_HEADER LL_MAX_HEADER
155 #define MAX_HEADER (LL_MAX_HEADER + 48)
159 * Old network device statistics. Fields are native words
160 * (unsigned long) so they can be read and written atomically.
163 struct net_device_stats
{
164 unsigned long rx_packets
;
165 unsigned long tx_packets
;
166 unsigned long rx_bytes
;
167 unsigned long tx_bytes
;
168 unsigned long rx_errors
;
169 unsigned long tx_errors
;
170 unsigned long rx_dropped
;
171 unsigned long tx_dropped
;
172 unsigned long multicast
;
173 unsigned long collisions
;
174 unsigned long rx_length_errors
;
175 unsigned long rx_over_errors
;
176 unsigned long rx_crc_errors
;
177 unsigned long rx_frame_errors
;
178 unsigned long rx_fifo_errors
;
179 unsigned long rx_missed_errors
;
180 unsigned long tx_aborted_errors
;
181 unsigned long tx_carrier_errors
;
182 unsigned long tx_fifo_errors
;
183 unsigned long tx_heartbeat_errors
;
184 unsigned long tx_window_errors
;
185 unsigned long rx_compressed
;
186 unsigned long tx_compressed
;
190 #include <linux/cache.h>
191 #include <linux/skbuff.h>
194 #include <linux/static_key.h>
195 extern struct static_key rps_needed
;
196 extern struct static_key rfs_needed
;
203 struct netdev_hw_addr
{
204 struct list_head list
;
205 unsigned char addr
[MAX_ADDR_LEN
];
207 #define NETDEV_HW_ADDR_T_LAN 1
208 #define NETDEV_HW_ADDR_T_SAN 2
209 #define NETDEV_HW_ADDR_T_SLAVE 3
210 #define NETDEV_HW_ADDR_T_UNICAST 4
211 #define NETDEV_HW_ADDR_T_MULTICAST 5
216 struct rcu_head rcu_head
;
219 struct netdev_hw_addr_list
{
220 struct list_head list
;
224 #define netdev_hw_addr_list_count(l) ((l)->count)
225 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
226 #define netdev_hw_addr_list_for_each(ha, l) \
227 list_for_each_entry(ha, &(l)->list, list)
229 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
230 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
231 #define netdev_for_each_uc_addr(ha, dev) \
232 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
234 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
235 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
236 #define netdev_for_each_mc_addr(ha, dev) \
237 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 #define LL_RESERVED_SPACE(dev) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
267 unsigned short type
, const void *daddr
,
268 const void *saddr
, unsigned int len
);
269 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
270 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
271 void (*cache_update
)(struct hh_cache
*hh
,
272 const struct net_device
*dev
,
273 const unsigned char *haddr
);
274 bool (*validate
)(const char *ll_header
, unsigned int len
);
277 /* These flag bits are private to the generic network queueing
278 * layer; they may not be explicitly referenced by any other
282 enum netdev_state_t
{
284 __LINK_STATE_PRESENT
,
285 __LINK_STATE_NOCARRIER
,
286 __LINK_STATE_LINKWATCH_PENDING
,
287 __LINK_STATE_DORMANT
,
292 * This structure holds boot-time configured netdevice settings. They
293 * are then used in the device probing.
295 struct netdev_boot_setup
{
299 #define NETDEV_BOOT_SETUP_MAX 8
301 int __init
netdev_boot_setup(char *str
);
304 * Structure for NAPI scheduling similar to tasklet but with weighting
307 /* The poll_list must only be managed by the entity which
308 * changes the state of the NAPI_STATE_SCHED bit. This means
309 * whoever atomically sets that bit can add this napi_struct
310 * to the per-CPU poll_list, and whoever clears that bit
311 * can remove from the list right before clearing the bit.
313 struct list_head poll_list
;
317 unsigned int gro_count
;
318 int (*poll
)(struct napi_struct
*, int);
319 #ifdef CONFIG_NETPOLL
322 struct net_device
*dev
;
323 struct sk_buff
*gro_list
;
325 struct hrtimer timer
;
326 struct list_head dev_list
;
327 struct hlist_node napi_hash_node
;
328 unsigned int napi_id
;
332 NAPI_STATE_SCHED
, /* Poll is scheduled */
333 NAPI_STATE_MISSED
, /* reschedule a napi */
334 NAPI_STATE_DISABLE
, /* Disable pending */
335 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
336 NAPI_STATE_HASHED
, /* In NAPI hash (busy polling possible) */
337 NAPI_STATE_NO_BUSY_POLL
,/* Do not add in napi_hash, no busy polling */
338 NAPI_STATE_IN_BUSY_POLL
,/* sk_busy_loop() owns this NAPI */
342 NAPIF_STATE_SCHED
= BIT(NAPI_STATE_SCHED
),
343 NAPIF_STATE_MISSED
= BIT(NAPI_STATE_MISSED
),
344 NAPIF_STATE_DISABLE
= BIT(NAPI_STATE_DISABLE
),
345 NAPIF_STATE_NPSVC
= BIT(NAPI_STATE_NPSVC
),
346 NAPIF_STATE_HASHED
= BIT(NAPI_STATE_HASHED
),
347 NAPIF_STATE_NO_BUSY_POLL
= BIT(NAPI_STATE_NO_BUSY_POLL
),
348 NAPIF_STATE_IN_BUSY_POLL
= BIT(NAPI_STATE_IN_BUSY_POLL
),
359 typedef enum gro_result gro_result_t
;
362 * enum rx_handler_result - Possible return values for rx_handlers.
363 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
365 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
366 * case skb->dev was changed by rx_handler.
367 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
368 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
370 * rx_handlers are functions called from inside __netif_receive_skb(), to do
371 * special processing of the skb, prior to delivery to protocol handlers.
373 * Currently, a net_device can only have a single rx_handler registered. Trying
374 * to register a second rx_handler will return -EBUSY.
376 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
377 * To unregister a rx_handler on a net_device, use
378 * netdev_rx_handler_unregister().
380 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
383 * If the rx_handler consumed the skb in some way, it should return
384 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
385 * the skb to be delivered in some other way.
387 * If the rx_handler changed skb->dev, to divert the skb to another
388 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
389 * new device will be called if it exists.
391 * If the rx_handler decides the skb should be ignored, it should return
392 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
393 * are registered on exact device (ptype->dev == skb->dev).
395 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
396 * delivered, it should return RX_HANDLER_PASS.
398 * A device without a registered rx_handler will behave as if rx_handler
399 * returned RX_HANDLER_PASS.
402 enum rx_handler_result
{
408 typedef enum rx_handler_result rx_handler_result_t
;
409 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
411 void __napi_schedule(struct napi_struct
*n
);
412 void __napi_schedule_irqoff(struct napi_struct
*n
);
414 static inline bool napi_disable_pending(struct napi_struct
*n
)
416 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
419 bool napi_schedule_prep(struct napi_struct
*n
);
422 * napi_schedule - schedule NAPI poll
425 * Schedule NAPI poll routine to be called if it is not already
428 static inline void napi_schedule(struct napi_struct
*n
)
430 if (napi_schedule_prep(n
))
435 * napi_schedule_irqoff - schedule NAPI poll
438 * Variant of napi_schedule(), assuming hard irqs are masked.
440 static inline void napi_schedule_irqoff(struct napi_struct
*n
)
442 if (napi_schedule_prep(n
))
443 __napi_schedule_irqoff(n
);
446 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
447 static inline bool napi_reschedule(struct napi_struct
*napi
)
449 if (napi_schedule_prep(napi
)) {
450 __napi_schedule(napi
);
456 bool napi_complete_done(struct napi_struct
*n
, int work_done
);
458 * napi_complete - NAPI processing complete
461 * Mark NAPI processing as complete.
462 * Consider using napi_complete_done() instead.
463 * Return false if device should avoid rearming interrupts.
465 static inline bool napi_complete(struct napi_struct
*n
)
467 return napi_complete_done(n
, 0);
471 * napi_hash_del - remove a NAPI from global table
472 * @napi: NAPI context
474 * Warning: caller must observe RCU grace period
475 * before freeing memory containing @napi, if
476 * this function returns true.
477 * Note: core networking stack automatically calls it
478 * from netif_napi_del().
479 * Drivers might want to call this helper to combine all
480 * the needed RCU grace periods into a single one.
482 bool napi_hash_del(struct napi_struct
*napi
);
485 * napi_disable - prevent NAPI from scheduling
488 * Stop NAPI from being scheduled on this context.
489 * Waits till any outstanding processing completes.
491 void napi_disable(struct napi_struct
*n
);
494 * napi_enable - enable NAPI scheduling
497 * Resume NAPI from being scheduled on this context.
498 * Must be paired with napi_disable.
500 static inline void napi_enable(struct napi_struct
*n
)
502 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
503 smp_mb__before_atomic();
504 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
505 clear_bit(NAPI_STATE_NPSVC
, &n
->state
);
509 * napi_synchronize - wait until NAPI is not running
512 * Wait until NAPI is done being scheduled on this context.
513 * Waits till any outstanding processing completes but
514 * does not disable future activations.
516 static inline void napi_synchronize(const struct napi_struct
*n
)
518 if (IS_ENABLED(CONFIG_SMP
))
519 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
525 enum netdev_queue_state_t
{
526 __QUEUE_STATE_DRV_XOFF
,
527 __QUEUE_STATE_STACK_XOFF
,
528 __QUEUE_STATE_FROZEN
,
531 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
532 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
533 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
535 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
536 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
538 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
542 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
543 * netif_tx_* functions below are used to manipulate this flag. The
544 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
545 * queue independently. The netif_xmit_*stopped functions below are called
546 * to check if the queue has been stopped by the driver or stack (either
547 * of the XOFF bits are set in the state). Drivers should not need to call
548 * netif_xmit*stopped functions, they should only be using netif_tx_*.
551 struct netdev_queue
{
555 struct net_device
*dev
;
556 struct Qdisc __rcu
*qdisc
;
557 struct Qdisc
*qdisc_sleeping
;
561 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
564 unsigned long tx_maxrate
;
566 * Number of TX timeouts for this queue
567 * (/sys/class/net/DEV/Q/trans_timeout)
569 unsigned long trans_timeout
;
573 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
576 * Time (in jiffies) of last Tx
578 unsigned long trans_start
;
585 } ____cacheline_aligned_in_smp
;
587 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
589 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
596 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
598 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
605 * This structure holds an RPS map which can be of variable length. The
606 * map is an array of CPUs.
613 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
616 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
617 * tail pointer for that CPU's input queue at the time of last enqueue, and
618 * a hardware filter index.
620 struct rps_dev_flow
{
623 unsigned int last_qtail
;
625 #define RPS_NO_FILTER 0xffff
628 * The rps_dev_flow_table structure contains a table of flow mappings.
630 struct rps_dev_flow_table
{
633 struct rps_dev_flow flows
[0];
635 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
636 ((_num) * sizeof(struct rps_dev_flow)))
639 * The rps_sock_flow_table contains mappings of flows to the last CPU
640 * on which they were processed by the application (set in recvmsg).
641 * Each entry is a 32bit value. Upper part is the high-order bits
642 * of flow hash, lower part is CPU number.
643 * rps_cpu_mask is used to partition the space, depending on number of
644 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
645 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
646 * meaning we use 32-6=26 bits for the hash.
648 struct rps_sock_flow_table
{
651 u32 ents
[0] ____cacheline_aligned_in_smp
;
653 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
655 #define RPS_NO_CPU 0xffff
657 extern u32 rps_cpu_mask
;
658 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
660 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
664 unsigned int index
= hash
& table
->mask
;
665 u32 val
= hash
& ~rps_cpu_mask
;
667 /* We only give a hint, preemption can change CPU under us */
668 val
|= raw_smp_processor_id();
670 if (table
->ents
[index
] != val
)
671 table
->ents
[index
] = val
;
675 #ifdef CONFIG_RFS_ACCEL
676 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
679 #endif /* CONFIG_RPS */
681 /* This structure contains an instance of an RX queue. */
682 struct netdev_rx_queue
{
684 struct rps_map __rcu
*rps_map
;
685 struct rps_dev_flow_table __rcu
*rps_flow_table
;
688 struct net_device
*dev
;
689 } ____cacheline_aligned_in_smp
;
692 * RX queue sysfs structures and functions.
694 struct rx_queue_attribute
{
695 struct attribute attr
;
696 ssize_t (*show
)(struct netdev_rx_queue
*queue
, char *buf
);
697 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
698 const char *buf
, size_t len
);
703 * This structure holds an XPS map which can be of variable length. The
704 * map is an array of queues.
708 unsigned int alloc_len
;
712 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
713 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
714 - sizeof(struct xps_map)) / sizeof(u16))
717 * This structure holds all XPS maps for device. Maps are indexed by CPU.
719 struct xps_dev_maps
{
721 struct xps_map __rcu
*cpu_map
[0];
723 #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
724 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
725 #endif /* CONFIG_XPS */
727 #define TC_MAX_QUEUE 16
728 #define TC_BITMASK 15
729 /* HW offloaded queuing disciplines txq count and offset maps */
730 struct netdev_tc_txq
{
735 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
737 * This structure is to hold information about the device
738 * configured to run FCoE protocol stack.
740 struct netdev_fcoe_hbainfo
{
741 char manufacturer
[64];
742 char serial_number
[64];
743 char hardware_version
[64];
744 char driver_version
[64];
745 char optionrom_version
[64];
746 char firmware_version
[64];
748 char model_description
[256];
752 #define MAX_PHYS_ITEM_ID_LEN 32
754 /* This structure holds a unique identifier to identify some
755 * physical item (port for example) used by a netdevice.
757 struct netdev_phys_item_id
{
758 unsigned char id
[MAX_PHYS_ITEM_ID_LEN
];
759 unsigned char id_len
;
762 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id
*a
,
763 struct netdev_phys_item_id
*b
)
765 return a
->id_len
== b
->id_len
&&
766 memcmp(a
->id
, b
->id
, a
->id_len
) == 0;
769 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
770 struct sk_buff
*skb
);
776 TC_SETUP_CLSMATCHALL
,
780 /* These structures hold the attributes of xdp state that are being passed
781 * to the netdevice through the xdp op.
783 enum xdp_netdev_command
{
784 /* Set or clear a bpf program used in the earliest stages of packet
785 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
786 * is responsible for calling bpf_prog_put on any old progs that are
787 * stored. In case of error, the callee need not release the new prog
788 * reference, but on success it takes ownership and must bpf_prog_put
789 * when it is no longer used.
793 /* Check if a bpf program is set on the device. The callee should
794 * set @prog_attached to one of XDP_ATTACHED_* values, note that "true"
795 * is equivalent to XDP_ATTACHED_DRV.
800 struct netlink_ext_ack
;
803 enum xdp_netdev_command command
;
808 struct bpf_prog
*prog
;
809 struct netlink_ext_ack
*extack
;
819 #ifdef CONFIG_XFRM_OFFLOAD
821 int (*xdo_dev_state_add
) (struct xfrm_state
*x
);
822 void (*xdo_dev_state_delete
) (struct xfrm_state
*x
);
823 void (*xdo_dev_state_free
) (struct xfrm_state
*x
);
824 bool (*xdo_dev_offload_ok
) (struct sk_buff
*skb
,
825 struct xfrm_state
*x
);
830 struct rcu_head rcuhead
;
835 * This structure defines the management hooks for network devices.
836 * The following hooks can be defined; unless noted otherwise, they are
837 * optional and can be filled with a null pointer.
839 * int (*ndo_init)(struct net_device *dev);
840 * This function is called once when a network device is registered.
841 * The network device can use this for any late stage initialization
842 * or semantic validation. It can fail with an error code which will
843 * be propagated back to register_netdev.
845 * void (*ndo_uninit)(struct net_device *dev);
846 * This function is called when device is unregistered or when registration
847 * fails. It is not called if init fails.
849 * int (*ndo_open)(struct net_device *dev);
850 * This function is called when a network device transitions to the up
853 * int (*ndo_stop)(struct net_device *dev);
854 * This function is called when a network device transitions to the down
857 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
858 * struct net_device *dev);
859 * Called when a packet needs to be transmitted.
860 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
861 * the queue before that can happen; it's for obsolete devices and weird
862 * corner cases, but the stack really does a non-trivial amount
863 * of useless work if you return NETDEV_TX_BUSY.
864 * Required; cannot be NULL.
866 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
867 * struct net_device *dev
868 * netdev_features_t features);
869 * Called by core transmit path to determine if device is capable of
870 * performing offload operations on a given packet. This is to give
871 * the device an opportunity to implement any restrictions that cannot
872 * be otherwise expressed by feature flags. The check is called with
873 * the set of features that the stack has calculated and it returns
874 * those the driver believes to be appropriate.
876 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
877 * void *accel_priv, select_queue_fallback_t fallback);
878 * Called to decide which queue to use when device supports multiple
881 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
882 * This function is called to allow device receiver to make
883 * changes to configuration when multicast or promiscuous is enabled.
885 * void (*ndo_set_rx_mode)(struct net_device *dev);
886 * This function is called device changes address list filtering.
887 * If driver handles unicast address filtering, it should set
888 * IFF_UNICAST_FLT in its priv_flags.
890 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
891 * This function is called when the Media Access Control address
892 * needs to be changed. If this interface is not defined, the
893 * MAC address can not be changed.
895 * int (*ndo_validate_addr)(struct net_device *dev);
896 * Test if Media Access Control address is valid for the device.
898 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
899 * Called when a user requests an ioctl which can't be handled by
900 * the generic interface code. If not defined ioctls return
901 * not supported error code.
903 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
904 * Used to set network devices bus interface parameters. This interface
905 * is retained for legacy reasons; new devices should use the bus
906 * interface (PCI) for low level management.
908 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
909 * Called when a user wants to change the Maximum Transfer Unit
912 * void (*ndo_tx_timeout)(struct net_device *dev);
913 * Callback used when the transmitter has not made any progress
914 * for dev->watchdog ticks.
916 * void (*ndo_get_stats64)(struct net_device *dev,
917 * struct rtnl_link_stats64 *storage);
918 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
919 * Called when a user wants to get the network device usage
920 * statistics. Drivers must do one of the following:
921 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
922 * rtnl_link_stats64 structure passed by the caller.
923 * 2. Define @ndo_get_stats to update a net_device_stats structure
924 * (which should normally be dev->stats) and return a pointer to
925 * it. The structure may be changed asynchronously only if each
926 * field is written atomically.
927 * 3. Update dev->stats asynchronously and atomically, and define
930 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
931 * Return true if this device supports offload stats of this attr_id.
933 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
935 * Get statistics for offload operations by attr_id. Write it into the
938 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
939 * If device supports VLAN filtering this function is called when a
940 * VLAN id is registered.
942 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
943 * If device supports VLAN filtering this function is called when a
944 * VLAN id is unregistered.
946 * void (*ndo_poll_controller)(struct net_device *dev);
948 * SR-IOV management functions.
949 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
950 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
951 * u8 qos, __be16 proto);
952 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
954 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
955 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
956 * int (*ndo_get_vf_config)(struct net_device *dev,
957 * int vf, struct ifla_vf_info *ivf);
958 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
959 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
960 * struct nlattr *port[]);
962 * Enable or disable the VF ability to query its RSS Redirection Table and
963 * Hash Key. This is needed since on some devices VF share this information
964 * with PF and querying it may introduce a theoretical security risk.
965 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
966 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
967 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
969 * Called to setup any 'tc' scheduler, classifier or action on @dev.
970 * This is always called from the stack with the rtnl lock held and netif
971 * tx queues stopped. This allows the netdevice to perform queue
974 * Fiber Channel over Ethernet (FCoE) offload functions.
975 * int (*ndo_fcoe_enable)(struct net_device *dev);
976 * Called when the FCoE protocol stack wants to start using LLD for FCoE
977 * so the underlying device can perform whatever needed configuration or
978 * initialization to support acceleration of FCoE traffic.
980 * int (*ndo_fcoe_disable)(struct net_device *dev);
981 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
982 * so the underlying device can perform whatever needed clean-ups to
983 * stop supporting acceleration of FCoE traffic.
985 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
986 * struct scatterlist *sgl, unsigned int sgc);
987 * Called when the FCoE Initiator wants to initialize an I/O that
988 * is a possible candidate for Direct Data Placement (DDP). The LLD can
989 * perform necessary setup and returns 1 to indicate the device is set up
990 * successfully to perform DDP on this I/O, otherwise this returns 0.
992 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
993 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
994 * indicated by the FC exchange id 'xid', so the underlying device can
995 * clean up and reuse resources for later DDP requests.
997 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
998 * struct scatterlist *sgl, unsigned int sgc);
999 * Called when the FCoE Target wants to initialize an I/O that
1000 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1001 * perform necessary setup and returns 1 to indicate the device is set up
1002 * successfully to perform DDP on this I/O, otherwise this returns 0.
1004 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1005 * struct netdev_fcoe_hbainfo *hbainfo);
1006 * Called when the FCoE Protocol stack wants information on the underlying
1007 * device. This information is utilized by the FCoE protocol stack to
1008 * register attributes with Fiber Channel management service as per the
1009 * FC-GS Fabric Device Management Information(FDMI) specification.
1011 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1012 * Called when the underlying device wants to override default World Wide
1013 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1014 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1015 * protocol stack to use.
1018 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1019 * u16 rxq_index, u32 flow_id);
1020 * Set hardware filter for RFS. rxq_index is the target queue index;
1021 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1022 * Return the filter ID on success, or a negative error code.
1024 * Slave management functions (for bridge, bonding, etc).
1025 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1026 * Called to make another netdev an underling.
1028 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1029 * Called to release previously enslaved netdev.
1031 * Feature/offload setting functions.
1032 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1033 * netdev_features_t features);
1034 * Adjusts the requested feature flags according to device-specific
1035 * constraints, and returns the resulting flags. Must not modify
1038 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1039 * Called to update device configuration to new features. Passed
1040 * feature set might be less than what was returned by ndo_fix_features()).
1041 * Must return >0 or -errno if it changed dev->features itself.
1043 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1044 * struct net_device *dev,
1045 * const unsigned char *addr, u16 vid, u16 flags)
1046 * Adds an FDB entry to dev for addr.
1047 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1048 * struct net_device *dev,
1049 * const unsigned char *addr, u16 vid)
1050 * Deletes the FDB entry from dev coresponding to addr.
1051 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1052 * struct net_device *dev, struct net_device *filter_dev,
1054 * Used to add FDB entries to dump requests. Implementers should add
1055 * entries to skb and update idx with the number of entries.
1057 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1059 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1060 * struct net_device *dev, u32 filter_mask,
1062 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1065 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1066 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1067 * which do not represent real hardware may define this to allow their
1068 * userspace components to manage their virtual carrier state. Devices
1069 * that determine carrier state from physical hardware properties (eg
1070 * network cables) or protocol-dependent mechanisms (eg
1071 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1073 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1074 * struct netdev_phys_item_id *ppid);
1075 * Called to get ID of physical port of this device. If driver does
1076 * not implement this, it is assumed that the hw is not able to have
1077 * multiple net devices on single physical port.
1079 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1080 * struct udp_tunnel_info *ti);
1081 * Called by UDP tunnel to notify a driver about the UDP port and socket
1082 * address family that a UDP tunnel is listnening to. It is called only
1083 * when a new port starts listening. The operation is protected by the
1086 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1087 * struct udp_tunnel_info *ti);
1088 * Called by UDP tunnel to notify the driver about a UDP port and socket
1089 * address family that the UDP tunnel is not listening to anymore. The
1090 * operation is protected by the RTNL.
1092 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1093 * struct net_device *dev)
1094 * Called by upper layer devices to accelerate switching or other
1095 * station functionality into hardware. 'pdev is the lowerdev
1096 * to use for the offload and 'dev' is the net device that will
1097 * back the offload. Returns a pointer to the private structure
1098 * the upper layer will maintain.
1099 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1100 * Called by upper layer device to delete the station created
1101 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1102 * the station and priv is the structure returned by the add
1104 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1105 * int queue_index, u32 maxrate);
1106 * Called when a user wants to set a max-rate limitation of specific
1108 * int (*ndo_get_iflink)(const struct net_device *dev);
1109 * Called to get the iflink value of this device.
1110 * void (*ndo_change_proto_down)(struct net_device *dev,
1112 * This function is used to pass protocol port error state information
1113 * to the switch driver. The switch driver can react to the proto_down
1114 * by doing a phys down on the associated switch port.
1115 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1116 * This function is used to get egress tunnel information for given skb.
1117 * This is useful for retrieving outer tunnel header parameters while
1119 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1120 * This function is used to specify the headroom that the skb must
1121 * consider when allocation skb during packet reception. Setting
1122 * appropriate rx headroom value allows avoiding skb head copy on
1123 * forward. Setting a negative value resets the rx headroom to the
1125 * int (*ndo_xdp)(struct net_device *dev, struct netdev_xdp *xdp);
1126 * This function is used to set or query state related to XDP on the
1127 * netdevice. See definition of enum xdp_netdev_command for details.
1128 * int (*ndo_xdp_xmit)(struct net_device *dev, struct xdp_buff *xdp);
1129 * This function is used to submit a XDP packet for transmit on a
1131 * void (*ndo_xdp_flush)(struct net_device *dev);
1132 * This function is used to inform the driver to flush a particular
1133 * xdp tx queue. Must be called on same CPU as xdp_xmit.
1135 struct net_device_ops
{
1136 int (*ndo_init
)(struct net_device
*dev
);
1137 void (*ndo_uninit
)(struct net_device
*dev
);
1138 int (*ndo_open
)(struct net_device
*dev
);
1139 int (*ndo_stop
)(struct net_device
*dev
);
1140 netdev_tx_t (*ndo_start_xmit
)(struct sk_buff
*skb
,
1141 struct net_device
*dev
);
1142 netdev_features_t (*ndo_features_check
)(struct sk_buff
*skb
,
1143 struct net_device
*dev
,
1144 netdev_features_t features
);
1145 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1146 struct sk_buff
*skb
,
1148 select_queue_fallback_t fallback
);
1149 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1151 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1152 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1154 int (*ndo_validate_addr
)(struct net_device
*dev
);
1155 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1156 struct ifreq
*ifr
, int cmd
);
1157 int (*ndo_set_config
)(struct net_device
*dev
,
1159 int (*ndo_change_mtu
)(struct net_device
*dev
,
1161 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1162 struct neigh_parms
*);
1163 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1165 void (*ndo_get_stats64
)(struct net_device
*dev
,
1166 struct rtnl_link_stats64
*storage
);
1167 bool (*ndo_has_offload_stats
)(const struct net_device
*dev
, int attr_id
);
1168 int (*ndo_get_offload_stats
)(int attr_id
,
1169 const struct net_device
*dev
,
1171 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1173 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1174 __be16 proto
, u16 vid
);
1175 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1176 __be16 proto
, u16 vid
);
1177 #ifdef CONFIG_NET_POLL_CONTROLLER
1178 void (*ndo_poll_controller
)(struct net_device
*dev
);
1179 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1180 struct netpoll_info
*info
);
1181 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1183 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1184 int queue
, u8
*mac
);
1185 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1186 int queue
, u16 vlan
,
1187 u8 qos
, __be16 proto
);
1188 int (*ndo_set_vf_rate
)(struct net_device
*dev
,
1189 int vf
, int min_tx_rate
,
1191 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1192 int vf
, bool setting
);
1193 int (*ndo_set_vf_trust
)(struct net_device
*dev
,
1194 int vf
, bool setting
);
1195 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1197 struct ifla_vf_info
*ivf
);
1198 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1199 int vf
, int link_state
);
1200 int (*ndo_get_vf_stats
)(struct net_device
*dev
,
1202 struct ifla_vf_stats
1204 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1206 struct nlattr
*port
[]);
1207 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1208 int vf
, struct sk_buff
*skb
);
1209 int (*ndo_set_vf_guid
)(struct net_device
*dev
,
1212 int (*ndo_set_vf_rss_query_en
)(
1213 struct net_device
*dev
,
1214 int vf
, bool setting
);
1215 int (*ndo_setup_tc
)(struct net_device
*dev
,
1216 enum tc_setup_type type
,
1218 #if IS_ENABLED(CONFIG_FCOE)
1219 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1220 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1221 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1223 struct scatterlist
*sgl
,
1225 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1227 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1229 struct scatterlist
*sgl
,
1231 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1232 struct netdev_fcoe_hbainfo
*hbainfo
);
1235 #if IS_ENABLED(CONFIG_LIBFCOE)
1236 #define NETDEV_FCOE_WWNN 0
1237 #define NETDEV_FCOE_WWPN 1
1238 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1239 u64
*wwn
, int type
);
1242 #ifdef CONFIG_RFS_ACCEL
1243 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1244 const struct sk_buff
*skb
,
1248 int (*ndo_add_slave
)(struct net_device
*dev
,
1249 struct net_device
*slave_dev
,
1250 struct netlink_ext_ack
*extack
);
1251 int (*ndo_del_slave
)(struct net_device
*dev
,
1252 struct net_device
*slave_dev
);
1253 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1254 netdev_features_t features
);
1255 int (*ndo_set_features
)(struct net_device
*dev
,
1256 netdev_features_t features
);
1257 int (*ndo_neigh_construct
)(struct net_device
*dev
,
1258 struct neighbour
*n
);
1259 void (*ndo_neigh_destroy
)(struct net_device
*dev
,
1260 struct neighbour
*n
);
1262 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1263 struct nlattr
*tb
[],
1264 struct net_device
*dev
,
1265 const unsigned char *addr
,
1268 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1269 struct nlattr
*tb
[],
1270 struct net_device
*dev
,
1271 const unsigned char *addr
,
1273 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1274 struct netlink_callback
*cb
,
1275 struct net_device
*dev
,
1276 struct net_device
*filter_dev
,
1279 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1280 struct nlmsghdr
*nlh
,
1282 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1284 struct net_device
*dev
,
1287 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1288 struct nlmsghdr
*nlh
,
1290 int (*ndo_change_carrier
)(struct net_device
*dev
,
1292 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1293 struct netdev_phys_item_id
*ppid
);
1294 int (*ndo_get_phys_port_name
)(struct net_device
*dev
,
1295 char *name
, size_t len
);
1296 void (*ndo_udp_tunnel_add
)(struct net_device
*dev
,
1297 struct udp_tunnel_info
*ti
);
1298 void (*ndo_udp_tunnel_del
)(struct net_device
*dev
,
1299 struct udp_tunnel_info
*ti
);
1300 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1301 struct net_device
*dev
);
1302 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1305 int (*ndo_get_lock_subclass
)(struct net_device
*dev
);
1306 int (*ndo_set_tx_maxrate
)(struct net_device
*dev
,
1309 int (*ndo_get_iflink
)(const struct net_device
*dev
);
1310 int (*ndo_change_proto_down
)(struct net_device
*dev
,
1312 int (*ndo_fill_metadata_dst
)(struct net_device
*dev
,
1313 struct sk_buff
*skb
);
1314 void (*ndo_set_rx_headroom
)(struct net_device
*dev
,
1315 int needed_headroom
);
1316 int (*ndo_xdp
)(struct net_device
*dev
,
1317 struct netdev_xdp
*xdp
);
1318 int (*ndo_xdp_xmit
)(struct net_device
*dev
,
1319 struct xdp_buff
*xdp
);
1320 void (*ndo_xdp_flush
)(struct net_device
*dev
);
1324 * enum net_device_priv_flags - &struct net_device priv_flags
1326 * These are the &struct net_device, they are only set internally
1327 * by drivers and used in the kernel. These flags are invisible to
1328 * userspace; this means that the order of these flags can change
1329 * during any kernel release.
1331 * You should have a pretty good reason to be extending these flags.
1333 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1334 * @IFF_EBRIDGE: Ethernet bridging device
1335 * @IFF_BONDING: bonding master or slave
1336 * @IFF_ISATAP: ISATAP interface (RFC4214)
1337 * @IFF_WAN_HDLC: WAN HDLC device
1338 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1340 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1341 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1342 * @IFF_MACVLAN_PORT: device used as macvlan port
1343 * @IFF_BRIDGE_PORT: device used as bridge port
1344 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1345 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1346 * @IFF_UNICAST_FLT: Supports unicast filtering
1347 * @IFF_TEAM_PORT: device used as team port
1348 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1349 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1350 * change when it's running
1351 * @IFF_MACVLAN: Macvlan device
1352 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1353 * underlying stacked devices
1354 * @IFF_IPVLAN_MASTER: IPvlan master device
1355 * @IFF_IPVLAN_SLAVE: IPvlan slave device
1356 * @IFF_L3MDEV_MASTER: device is an L3 master device
1357 * @IFF_NO_QUEUE: device can run without qdisc attached
1358 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1359 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1360 * @IFF_TEAM: device is a team device
1361 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1362 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1363 * entity (i.e. the master device for bridged veth)
1364 * @IFF_MACSEC: device is a MACsec device
1366 enum netdev_priv_flags
{
1367 IFF_802_1Q_VLAN
= 1<<0,
1371 IFF_WAN_HDLC
= 1<<4,
1372 IFF_XMIT_DST_RELEASE
= 1<<5,
1373 IFF_DONT_BRIDGE
= 1<<6,
1374 IFF_DISABLE_NETPOLL
= 1<<7,
1375 IFF_MACVLAN_PORT
= 1<<8,
1376 IFF_BRIDGE_PORT
= 1<<9,
1377 IFF_OVS_DATAPATH
= 1<<10,
1378 IFF_TX_SKB_SHARING
= 1<<11,
1379 IFF_UNICAST_FLT
= 1<<12,
1380 IFF_TEAM_PORT
= 1<<13,
1381 IFF_SUPP_NOFCS
= 1<<14,
1382 IFF_LIVE_ADDR_CHANGE
= 1<<15,
1383 IFF_MACVLAN
= 1<<16,
1384 IFF_XMIT_DST_RELEASE_PERM
= 1<<17,
1385 IFF_IPVLAN_MASTER
= 1<<18,
1386 IFF_IPVLAN_SLAVE
= 1<<19,
1387 IFF_L3MDEV_MASTER
= 1<<20,
1388 IFF_NO_QUEUE
= 1<<21,
1389 IFF_OPENVSWITCH
= 1<<22,
1390 IFF_L3MDEV_SLAVE
= 1<<23,
1392 IFF_RXFH_CONFIGURED
= 1<<25,
1393 IFF_PHONY_HEADROOM
= 1<<26,
1397 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1398 #define IFF_EBRIDGE IFF_EBRIDGE
1399 #define IFF_BONDING IFF_BONDING
1400 #define IFF_ISATAP IFF_ISATAP
1401 #define IFF_WAN_HDLC IFF_WAN_HDLC
1402 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1403 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1404 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1405 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1406 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1407 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1408 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1409 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1410 #define IFF_TEAM_PORT IFF_TEAM_PORT
1411 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1412 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1413 #define IFF_MACVLAN IFF_MACVLAN
1414 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1415 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1416 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1417 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1418 #define IFF_NO_QUEUE IFF_NO_QUEUE
1419 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1420 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1421 #define IFF_TEAM IFF_TEAM
1422 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1423 #define IFF_MACSEC IFF_MACSEC
1426 * struct net_device - The DEVICE structure.
1428 * Actually, this whole structure is a big mistake. It mixes I/O
1429 * data with strictly "high-level" data, and it has to know about
1430 * almost every data structure used in the INET module.
1432 * @name: This is the first field of the "visible" part of this structure
1433 * (i.e. as seen by users in the "Space.c" file). It is the name
1436 * @name_hlist: Device name hash chain, please keep it close to name[]
1437 * @ifalias: SNMP alias
1438 * @mem_end: Shared memory end
1439 * @mem_start: Shared memory start
1440 * @base_addr: Device I/O address
1441 * @irq: Device IRQ number
1443 * @carrier_changes: Stats to monitor carrier on<->off transitions
1445 * @state: Generic network queuing layer state, see netdev_state_t
1446 * @dev_list: The global list of network devices
1447 * @napi_list: List entry used for polling NAPI devices
1448 * @unreg_list: List entry when we are unregistering the
1449 * device; see the function unregister_netdev
1450 * @close_list: List entry used when we are closing the device
1451 * @ptype_all: Device-specific packet handlers for all protocols
1452 * @ptype_specific: Device-specific, protocol-specific packet handlers
1454 * @adj_list: Directly linked devices, like slaves for bonding
1455 * @features: Currently active device features
1456 * @hw_features: User-changeable features
1458 * @wanted_features: User-requested features
1459 * @vlan_features: Mask of features inheritable by VLAN devices
1461 * @hw_enc_features: Mask of features inherited by encapsulating devices
1462 * This field indicates what encapsulation
1463 * offloads the hardware is capable of doing,
1464 * and drivers will need to set them appropriately.
1466 * @mpls_features: Mask of features inheritable by MPLS
1468 * @ifindex: interface index
1469 * @group: The group the device belongs to
1471 * @stats: Statistics struct, which was left as a legacy, use
1472 * rtnl_link_stats64 instead
1474 * @rx_dropped: Dropped packets by core network,
1475 * do not use this in drivers
1476 * @tx_dropped: Dropped packets by core network,
1477 * do not use this in drivers
1478 * @rx_nohandler: nohandler dropped packets by core network on
1479 * inactive devices, do not use this in drivers
1481 * @wireless_handlers: List of functions to handle Wireless Extensions,
1483 * see <net/iw_handler.h> for details.
1484 * @wireless_data: Instance data managed by the core of wireless extensions
1486 * @netdev_ops: Includes several pointers to callbacks,
1487 * if one wants to override the ndo_*() functions
1488 * @ethtool_ops: Management operations
1489 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1490 * discovery handling. Necessary for e.g. 6LoWPAN.
1491 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1492 * of Layer 2 headers.
1494 * @flags: Interface flags (a la BSD)
1495 * @priv_flags: Like 'flags' but invisible to userspace,
1496 * see if.h for the definitions
1497 * @gflags: Global flags ( kept as legacy )
1498 * @padded: How much padding added by alloc_netdev()
1499 * @operstate: RFC2863 operstate
1500 * @link_mode: Mapping policy to operstate
1501 * @if_port: Selectable AUI, TP, ...
1503 * @mtu: Interface MTU value
1504 * @min_mtu: Interface Minimum MTU value
1505 * @max_mtu: Interface Maximum MTU value
1506 * @type: Interface hardware type
1507 * @hard_header_len: Maximum hardware header length.
1508 * @min_header_len: Minimum hardware header length
1510 * @needed_headroom: Extra headroom the hardware may need, but not in all
1511 * cases can this be guaranteed
1512 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1513 * cases can this be guaranteed. Some cases also use
1514 * LL_MAX_HEADER instead to allocate the skb
1516 * interface address info:
1518 * @perm_addr: Permanent hw address
1519 * @addr_assign_type: Hw address assignment type
1520 * @addr_len: Hardware address length
1521 * @neigh_priv_len: Used in neigh_alloc()
1522 * @dev_id: Used to differentiate devices that share
1523 * the same link layer address
1524 * @dev_port: Used to differentiate devices that share
1526 * @addr_list_lock: XXX: need comments on this one
1527 * @uc_promisc: Counter that indicates promiscuous mode
1528 * has been enabled due to the need to listen to
1529 * additional unicast addresses in a device that
1530 * does not implement ndo_set_rx_mode()
1531 * @uc: unicast mac addresses
1532 * @mc: multicast mac addresses
1533 * @dev_addrs: list of device hw addresses
1534 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1535 * @promiscuity: Number of times the NIC is told to work in
1536 * promiscuous mode; if it becomes 0 the NIC will
1537 * exit promiscuous mode
1538 * @allmulti: Counter, enables or disables allmulticast mode
1540 * @vlan_info: VLAN info
1541 * @dsa_ptr: dsa specific data
1542 * @tipc_ptr: TIPC specific data
1543 * @atalk_ptr: AppleTalk link
1544 * @ip_ptr: IPv4 specific data
1545 * @dn_ptr: DECnet specific data
1546 * @ip6_ptr: IPv6 specific data
1547 * @ax25_ptr: AX.25 specific data
1548 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1550 * @dev_addr: Hw address (before bcast,
1551 * because most packets are unicast)
1553 * @_rx: Array of RX queues
1554 * @num_rx_queues: Number of RX queues
1555 * allocated at register_netdev() time
1556 * @real_num_rx_queues: Number of RX queues currently active in device
1558 * @rx_handler: handler for received packets
1559 * @rx_handler_data: XXX: need comments on this one
1560 * @ingress_queue: XXX: need comments on this one
1561 * @broadcast: hw bcast address
1563 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1564 * indexed by RX queue number. Assigned by driver.
1565 * This must only be set if the ndo_rx_flow_steer
1566 * operation is defined
1567 * @index_hlist: Device index hash chain
1569 * @_tx: Array of TX queues
1570 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1571 * @real_num_tx_queues: Number of TX queues currently active in device
1572 * @qdisc: Root qdisc from userspace point of view
1573 * @tx_queue_len: Max frames per queue allowed
1574 * @tx_global_lock: XXX: need comments on this one
1576 * @xps_maps: XXX: need comments on this one
1578 * @watchdog_timeo: Represents the timeout that is used by
1579 * the watchdog (see dev_watchdog())
1580 * @watchdog_timer: List of timers
1582 * @pcpu_refcnt: Number of references to this device
1583 * @todo_list: Delayed register/unregister
1584 * @link_watch_list: XXX: need comments on this one
1586 * @reg_state: Register/unregister state machine
1587 * @dismantle: Device is going to be freed
1588 * @rtnl_link_state: This enum represents the phases of creating
1591 * @needs_free_netdev: Should unregister perform free_netdev?
1592 * @priv_destructor: Called from unregister
1593 * @npinfo: XXX: need comments on this one
1594 * @nd_net: Network namespace this network device is inside
1596 * @ml_priv: Mid-layer private
1597 * @lstats: Loopback statistics
1598 * @tstats: Tunnel statistics
1599 * @dstats: Dummy statistics
1600 * @vstats: Virtual ethernet statistics
1605 * @dev: Class/net/name entry
1606 * @sysfs_groups: Space for optional device, statistics and wireless
1609 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1610 * @rtnl_link_ops: Rtnl_link_ops
1612 * @gso_max_size: Maximum size of generic segmentation offload
1613 * @gso_max_segs: Maximum number of segments that can be passed to the
1616 * @dcbnl_ops: Data Center Bridging netlink ops
1617 * @num_tc: Number of traffic classes in the net device
1618 * @tc_to_txq: XXX: need comments on this one
1619 * @prio_tc_map: XXX: need comments on this one
1621 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1623 * @priomap: XXX: need comments on this one
1624 * @phydev: Physical device may attach itself
1625 * for hardware timestamping
1627 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1628 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1630 * @proto_down: protocol port state information can be sent to the
1631 * switch driver and used to set the phys state of the
1634 * FIXME: cleanup struct net_device such that network protocol info
1639 char name
[IFNAMSIZ
];
1640 struct hlist_node name_hlist
;
1641 struct dev_ifalias __rcu
*ifalias
;
1643 * I/O specific fields
1644 * FIXME: Merge these and struct ifmap into one
1646 unsigned long mem_end
;
1647 unsigned long mem_start
;
1648 unsigned long base_addr
;
1651 atomic_t carrier_changes
;
1654 * Some hardware also needs these fields (state,dev_list,
1655 * napi_list,unreg_list,close_list) but they are not
1656 * part of the usual set specified in Space.c.
1659 unsigned long state
;
1661 struct list_head dev_list
;
1662 struct list_head napi_list
;
1663 struct list_head unreg_list
;
1664 struct list_head close_list
;
1665 struct list_head ptype_all
;
1666 struct list_head ptype_specific
;
1669 struct list_head upper
;
1670 struct list_head lower
;
1673 netdev_features_t features
;
1674 netdev_features_t hw_features
;
1675 netdev_features_t wanted_features
;
1676 netdev_features_t vlan_features
;
1677 netdev_features_t hw_enc_features
;
1678 netdev_features_t mpls_features
;
1679 netdev_features_t gso_partial_features
;
1684 struct net_device_stats stats
;
1686 atomic_long_t rx_dropped
;
1687 atomic_long_t tx_dropped
;
1688 atomic_long_t rx_nohandler
;
1690 #ifdef CONFIG_WIRELESS_EXT
1691 const struct iw_handler_def
*wireless_handlers
;
1692 struct iw_public_data
*wireless_data
;
1694 const struct net_device_ops
*netdev_ops
;
1695 const struct ethtool_ops
*ethtool_ops
;
1696 #ifdef CONFIG_NET_SWITCHDEV
1697 const struct switchdev_ops
*switchdev_ops
;
1699 #ifdef CONFIG_NET_L3_MASTER_DEV
1700 const struct l3mdev_ops
*l3mdev_ops
;
1702 #if IS_ENABLED(CONFIG_IPV6)
1703 const struct ndisc_ops
*ndisc_ops
;
1707 const struct xfrmdev_ops
*xfrmdev_ops
;
1710 const struct header_ops
*header_ops
;
1713 unsigned int priv_flags
;
1715 unsigned short gflags
;
1716 unsigned short padded
;
1718 unsigned char operstate
;
1719 unsigned char link_mode
;
1721 unsigned char if_port
;
1725 unsigned int min_mtu
;
1726 unsigned int max_mtu
;
1727 unsigned short type
;
1728 unsigned short hard_header_len
;
1729 unsigned char min_header_len
;
1731 unsigned short needed_headroom
;
1732 unsigned short needed_tailroom
;
1734 /* Interface address info. */
1735 unsigned char perm_addr
[MAX_ADDR_LEN
];
1736 unsigned char addr_assign_type
;
1737 unsigned char addr_len
;
1738 unsigned short neigh_priv_len
;
1739 unsigned short dev_id
;
1740 unsigned short dev_port
;
1741 spinlock_t addr_list_lock
;
1742 unsigned char name_assign_type
;
1744 struct netdev_hw_addr_list uc
;
1745 struct netdev_hw_addr_list mc
;
1746 struct netdev_hw_addr_list dev_addrs
;
1749 struct kset
*queues_kset
;
1751 unsigned int promiscuity
;
1752 unsigned int allmulti
;
1755 /* Protocol-specific pointers */
1757 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1758 struct vlan_info __rcu
*vlan_info
;
1760 #if IS_ENABLED(CONFIG_NET_DSA)
1761 struct dsa_port
*dsa_ptr
;
1763 #if IS_ENABLED(CONFIG_TIPC)
1764 struct tipc_bearer __rcu
*tipc_ptr
;
1767 struct in_device __rcu
*ip_ptr
;
1768 struct dn_dev __rcu
*dn_ptr
;
1769 struct inet6_dev __rcu
*ip6_ptr
;
1771 struct wireless_dev
*ieee80211_ptr
;
1772 struct wpan_dev
*ieee802154_ptr
;
1773 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1774 struct mpls_dev __rcu
*mpls_ptr
;
1778 * Cache lines mostly used on receive path (including eth_type_trans())
1780 /* Interface address info used in eth_type_trans() */
1781 unsigned char *dev_addr
;
1784 struct netdev_rx_queue
*_rx
;
1786 unsigned int num_rx_queues
;
1787 unsigned int real_num_rx_queues
;
1790 struct bpf_prog __rcu
*xdp_prog
;
1791 unsigned long gro_flush_timeout
;
1792 rx_handler_func_t __rcu
*rx_handler
;
1793 void __rcu
*rx_handler_data
;
1795 #ifdef CONFIG_NET_CLS_ACT
1796 struct tcf_proto __rcu
*ingress_cl_list
;
1798 struct netdev_queue __rcu
*ingress_queue
;
1799 #ifdef CONFIG_NETFILTER_INGRESS
1800 struct nf_hook_entries __rcu
*nf_hooks_ingress
;
1803 unsigned char broadcast
[MAX_ADDR_LEN
];
1804 #ifdef CONFIG_RFS_ACCEL
1805 struct cpu_rmap
*rx_cpu_rmap
;
1807 struct hlist_node index_hlist
;
1810 * Cache lines mostly used on transmit path
1812 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1813 unsigned int num_tx_queues
;
1814 unsigned int real_num_tx_queues
;
1815 struct Qdisc
*qdisc
;
1816 #ifdef CONFIG_NET_SCHED
1817 DECLARE_HASHTABLE (qdisc_hash
, 4);
1819 unsigned int tx_queue_len
;
1820 spinlock_t tx_global_lock
;
1824 struct xps_dev_maps __rcu
*xps_maps
;
1826 #ifdef CONFIG_NET_CLS_ACT
1827 struct tcf_proto __rcu
*egress_cl_list
;
1830 /* These may be needed for future network-power-down code. */
1831 struct timer_list watchdog_timer
;
1833 int __percpu
*pcpu_refcnt
;
1834 struct list_head todo_list
;
1836 struct list_head link_watch_list
;
1838 enum { NETREG_UNINITIALIZED
=0,
1839 NETREG_REGISTERED
, /* completed register_netdevice */
1840 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1841 NETREG_UNREGISTERED
, /* completed unregister todo */
1842 NETREG_RELEASED
, /* called free_netdev */
1843 NETREG_DUMMY
, /* dummy device for NAPI poll */
1849 RTNL_LINK_INITIALIZED
,
1850 RTNL_LINK_INITIALIZING
,
1851 } rtnl_link_state
:16;
1853 bool needs_free_netdev
;
1854 void (*priv_destructor
)(struct net_device
*dev
);
1856 #ifdef CONFIG_NETPOLL
1857 struct netpoll_info __rcu
*npinfo
;
1860 possible_net_t nd_net
;
1862 /* mid-layer private */
1865 struct pcpu_lstats __percpu
*lstats
;
1866 struct pcpu_sw_netstats __percpu
*tstats
;
1867 struct pcpu_dstats __percpu
*dstats
;
1868 struct pcpu_vstats __percpu
*vstats
;
1871 #if IS_ENABLED(CONFIG_GARP)
1872 struct garp_port __rcu
*garp_port
;
1874 #if IS_ENABLED(CONFIG_MRP)
1875 struct mrp_port __rcu
*mrp_port
;
1879 const struct attribute_group
*sysfs_groups
[4];
1880 const struct attribute_group
*sysfs_rx_queue_group
;
1882 const struct rtnl_link_ops
*rtnl_link_ops
;
1884 /* for setting kernel sock attribute on TCP connection setup */
1885 #define GSO_MAX_SIZE 65536
1886 unsigned int gso_max_size
;
1887 #define GSO_MAX_SEGS 65535
1891 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1894 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1895 u8 prio_tc_map
[TC_BITMASK
+ 1];
1897 #if IS_ENABLED(CONFIG_FCOE)
1898 unsigned int fcoe_ddp_xid
;
1900 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1901 struct netprio_map __rcu
*priomap
;
1903 struct phy_device
*phydev
;
1904 struct lock_class_key
*qdisc_tx_busylock
;
1905 struct lock_class_key
*qdisc_running_key
;
1908 #define to_net_dev(d) container_of(d, struct net_device, dev)
1910 static inline bool netif_elide_gro(const struct net_device
*dev
)
1912 if (!(dev
->features
& NETIF_F_GRO
) || dev
->xdp_prog
)
1917 #define NETDEV_ALIGN 32
1920 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1922 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1926 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1928 if (tc
>= dev
->num_tc
)
1931 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1935 int netdev_txq_to_tc(struct net_device
*dev
, unsigned int txq
);
1936 void netdev_reset_tc(struct net_device
*dev
);
1937 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
);
1938 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
);
1941 int netdev_get_num_tc(struct net_device
*dev
)
1947 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1950 return &dev
->_tx
[index
];
1953 static inline struct netdev_queue
*skb_get_tx_queue(const struct net_device
*dev
,
1954 const struct sk_buff
*skb
)
1956 return netdev_get_tx_queue(dev
, skb_get_queue_mapping(skb
));
1959 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1960 void (*f
)(struct net_device
*,
1961 struct netdev_queue
*,
1967 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1968 f(dev
, &dev
->_tx
[i
], arg
);
1971 #define netdev_lockdep_set_classes(dev) \
1973 static struct lock_class_key qdisc_tx_busylock_key; \
1974 static struct lock_class_key qdisc_running_key; \
1975 static struct lock_class_key qdisc_xmit_lock_key; \
1976 static struct lock_class_key dev_addr_list_lock_key; \
1979 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
1980 (dev)->qdisc_running_key = &qdisc_running_key; \
1981 lockdep_set_class(&(dev)->addr_list_lock, \
1982 &dev_addr_list_lock_key); \
1983 for (i = 0; i < (dev)->num_tx_queues; i++) \
1984 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
1985 &qdisc_xmit_lock_key); \
1988 struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1989 struct sk_buff
*skb
,
1992 /* returns the headroom that the master device needs to take in account
1993 * when forwarding to this dev
1995 static inline unsigned netdev_get_fwd_headroom(struct net_device
*dev
)
1997 return dev
->priv_flags
& IFF_PHONY_HEADROOM
? 0 : dev
->needed_headroom
;
2000 static inline void netdev_set_rx_headroom(struct net_device
*dev
, int new_hr
)
2002 if (dev
->netdev_ops
->ndo_set_rx_headroom
)
2003 dev
->netdev_ops
->ndo_set_rx_headroom(dev
, new_hr
);
2006 /* set the device rx headroom to the dev's default */
2007 static inline void netdev_reset_rx_headroom(struct net_device
*dev
)
2009 netdev_set_rx_headroom(dev
, -1);
2013 * Net namespace inlines
2016 struct net
*dev_net(const struct net_device
*dev
)
2018 return read_pnet(&dev
->nd_net
);
2022 void dev_net_set(struct net_device
*dev
, struct net
*net
)
2024 write_pnet(&dev
->nd_net
, net
);
2028 * netdev_priv - access network device private data
2029 * @dev: network device
2031 * Get network device private data
2033 static inline void *netdev_priv(const struct net_device
*dev
)
2035 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
2038 /* Set the sysfs physical device reference for the network logical device
2039 * if set prior to registration will cause a symlink during initialization.
2041 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2043 /* Set the sysfs device type for the network logical device to allow
2044 * fine-grained identification of different network device types. For
2045 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2047 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2049 /* Default NAPI poll() weight
2050 * Device drivers are strongly advised to not use bigger value
2052 #define NAPI_POLL_WEIGHT 64
2055 * netif_napi_add - initialize a NAPI context
2056 * @dev: network device
2057 * @napi: NAPI context
2058 * @poll: polling function
2059 * @weight: default weight
2061 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2062 * *any* of the other NAPI-related functions.
2064 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
2065 int (*poll
)(struct napi_struct
*, int), int weight
);
2068 * netif_tx_napi_add - initialize a NAPI context
2069 * @dev: network device
2070 * @napi: NAPI context
2071 * @poll: polling function
2072 * @weight: default weight
2074 * This variant of netif_napi_add() should be used from drivers using NAPI
2075 * to exclusively poll a TX queue.
2076 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2078 static inline void netif_tx_napi_add(struct net_device
*dev
,
2079 struct napi_struct
*napi
,
2080 int (*poll
)(struct napi_struct
*, int),
2083 set_bit(NAPI_STATE_NO_BUSY_POLL
, &napi
->state
);
2084 netif_napi_add(dev
, napi
, poll
, weight
);
2088 * netif_napi_del - remove a NAPI context
2089 * @napi: NAPI context
2091 * netif_napi_del() removes a NAPI context from the network device NAPI list
2093 void netif_napi_del(struct napi_struct
*napi
);
2095 struct napi_gro_cb
{
2096 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2099 /* Length of frag0. */
2100 unsigned int frag0_len
;
2102 /* This indicates where we are processing relative to skb->data. */
2105 /* This is non-zero if the packet cannot be merged with the new skb. */
2108 /* Save the IP ID here and check when we get to the transport layer */
2111 /* Number of segments aggregated. */
2114 /* Start offset for remote checksum offload */
2115 u16 gro_remcsum_start
;
2117 /* jiffies when first packet was created/queued */
2120 /* Used in ipv6_gro_receive() and foo-over-udp */
2123 /* This is non-zero if the packet may be of the same flow. */
2126 /* Used in tunnel GRO receive */
2129 /* GRO checksum is valid */
2132 /* Number of checksums via CHECKSUM_UNNECESSARY */
2137 #define NAPI_GRO_FREE 1
2138 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2140 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2143 /* Used in GRE, set in fou/gue_gro_receive */
2146 /* Used to determine if flush_id can be ignored */
2149 /* Number of gro_receive callbacks this packet already went through */
2150 u8 recursion_counter
:4;
2154 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2157 /* used in skb_gro_receive() slow path */
2158 struct sk_buff
*last
;
2161 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2163 #define GRO_RECURSION_LIMIT 15
2164 static inline int gro_recursion_inc_test(struct sk_buff
*skb
)
2166 return ++NAPI_GRO_CB(skb
)->recursion_counter
== GRO_RECURSION_LIMIT
;
2169 typedef struct sk_buff
**(*gro_receive_t
)(struct sk_buff
**, struct sk_buff
*);
2170 static inline struct sk_buff
**call_gro_receive(gro_receive_t cb
,
2171 struct sk_buff
**head
,
2172 struct sk_buff
*skb
)
2174 if (unlikely(gro_recursion_inc_test(skb
))) {
2175 NAPI_GRO_CB(skb
)->flush
|= 1;
2179 return cb(head
, skb
);
2182 typedef struct sk_buff
**(*gro_receive_sk_t
)(struct sock
*, struct sk_buff
**,
2184 static inline struct sk_buff
**call_gro_receive_sk(gro_receive_sk_t cb
,
2186 struct sk_buff
**head
,
2187 struct sk_buff
*skb
)
2189 if (unlikely(gro_recursion_inc_test(skb
))) {
2190 NAPI_GRO_CB(skb
)->flush
|= 1;
2194 return cb(sk
, head
, skb
);
2197 struct packet_type
{
2198 __be16 type
; /* This is really htons(ether_type). */
2199 struct net_device
*dev
; /* NULL is wildcarded here */
2200 int (*func
) (struct sk_buff
*,
2201 struct net_device
*,
2202 struct packet_type
*,
2203 struct net_device
*);
2204 bool (*id_match
)(struct packet_type
*ptype
,
2206 void *af_packet_priv
;
2207 struct list_head list
;
2210 struct offload_callbacks
{
2211 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
2212 netdev_features_t features
);
2213 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
2214 struct sk_buff
*skb
);
2215 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
2218 struct packet_offload
{
2219 __be16 type
; /* This is really htons(ether_type). */
2221 struct offload_callbacks callbacks
;
2222 struct list_head list
;
2225 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2226 struct pcpu_sw_netstats
{
2231 struct u64_stats_sync syncp
;
2234 #define __netdev_alloc_pcpu_stats(type, gfp) \
2236 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2239 for_each_possible_cpu(__cpu) { \
2240 typeof(type) *stat; \
2241 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2242 u64_stats_init(&stat->syncp); \
2248 #define netdev_alloc_pcpu_stats(type) \
2249 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2251 enum netdev_lag_tx_type
{
2252 NETDEV_LAG_TX_TYPE_UNKNOWN
,
2253 NETDEV_LAG_TX_TYPE_RANDOM
,
2254 NETDEV_LAG_TX_TYPE_BROADCAST
,
2255 NETDEV_LAG_TX_TYPE_ROUNDROBIN
,
2256 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP
,
2257 NETDEV_LAG_TX_TYPE_HASH
,
2260 struct netdev_lag_upper_info
{
2261 enum netdev_lag_tx_type tx_type
;
2264 struct netdev_lag_lower_state_info
{
2269 #include <linux/notifier.h>
2271 /* netdevice notifier chain. Please remember to update the rtnetlink
2272 * notification exclusion list in rtnetlink_event() when adding new
2275 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2276 #define NETDEV_DOWN 0x0002
2277 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2278 detected a hardware crash and restarted
2279 - we can use this eg to kick tcp sessions
2281 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2282 #define NETDEV_REGISTER 0x0005
2283 #define NETDEV_UNREGISTER 0x0006
2284 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2285 #define NETDEV_CHANGEADDR 0x0008
2286 #define NETDEV_GOING_DOWN 0x0009
2287 #define NETDEV_CHANGENAME 0x000A
2288 #define NETDEV_FEAT_CHANGE 0x000B
2289 #define NETDEV_BONDING_FAILOVER 0x000C
2290 #define NETDEV_PRE_UP 0x000D
2291 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2292 #define NETDEV_POST_TYPE_CHANGE 0x000F
2293 #define NETDEV_POST_INIT 0x0010
2294 #define NETDEV_UNREGISTER_FINAL 0x0011
2295 #define NETDEV_RELEASE 0x0012
2296 #define NETDEV_NOTIFY_PEERS 0x0013
2297 #define NETDEV_JOIN 0x0014
2298 #define NETDEV_CHANGEUPPER 0x0015
2299 #define NETDEV_RESEND_IGMP 0x0016
2300 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2301 #define NETDEV_CHANGEINFODATA 0x0018
2302 #define NETDEV_BONDING_INFO 0x0019
2303 #define NETDEV_PRECHANGEUPPER 0x001A
2304 #define NETDEV_CHANGELOWERSTATE 0x001B
2305 #define NETDEV_UDP_TUNNEL_PUSH_INFO 0x001C
2306 #define NETDEV_UDP_TUNNEL_DROP_INFO 0x001D
2307 #define NETDEV_CHANGE_TX_QUEUE_LEN 0x001E
2309 int register_netdevice_notifier(struct notifier_block
*nb
);
2310 int unregister_netdevice_notifier(struct notifier_block
*nb
);
2312 struct netdev_notifier_info
{
2313 struct net_device
*dev
;
2314 struct netlink_ext_ack
*extack
;
2317 struct netdev_notifier_change_info
{
2318 struct netdev_notifier_info info
; /* must be first */
2319 unsigned int flags_changed
;
2322 struct netdev_notifier_changeupper_info
{
2323 struct netdev_notifier_info info
; /* must be first */
2324 struct net_device
*upper_dev
; /* new upper dev */
2325 bool master
; /* is upper dev master */
2326 bool linking
; /* is the notification for link or unlink */
2327 void *upper_info
; /* upper dev info */
2330 struct netdev_notifier_changelowerstate_info
{
2331 struct netdev_notifier_info info
; /* must be first */
2332 void *lower_state_info
; /* is lower dev state */
2335 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
2336 struct net_device
*dev
)
2339 info
->extack
= NULL
;
2342 static inline struct net_device
*
2343 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
2348 static inline struct netlink_ext_ack
*
2349 netdev_notifier_info_to_extack(const struct netdev_notifier_info
*info
)
2351 return info
->extack
;
2354 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
2357 extern rwlock_t dev_base_lock
; /* Device list lock */
2359 #define for_each_netdev(net, d) \
2360 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2361 #define for_each_netdev_reverse(net, d) \
2362 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2363 #define for_each_netdev_rcu(net, d) \
2364 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2365 #define for_each_netdev_safe(net, d, n) \
2366 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2367 #define for_each_netdev_continue(net, d) \
2368 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2369 #define for_each_netdev_continue_rcu(net, d) \
2370 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2371 #define for_each_netdev_in_bond_rcu(bond, slave) \
2372 for_each_netdev_rcu(&init_net, slave) \
2373 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2374 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2376 static inline struct net_device
*next_net_device(struct net_device
*dev
)
2378 struct list_head
*lh
;
2382 lh
= dev
->dev_list
.next
;
2383 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2386 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
2388 struct list_head
*lh
;
2392 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
2393 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2396 static inline struct net_device
*first_net_device(struct net
*net
)
2398 return list_empty(&net
->dev_base_head
) ? NULL
:
2399 net_device_entry(net
->dev_base_head
.next
);
2402 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
2404 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
2406 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
2409 int netdev_boot_setup_check(struct net_device
*dev
);
2410 unsigned long netdev_boot_base(const char *prefix
, int unit
);
2411 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
2412 const char *hwaddr
);
2413 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2414 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
2415 void dev_add_pack(struct packet_type
*pt
);
2416 void dev_remove_pack(struct packet_type
*pt
);
2417 void __dev_remove_pack(struct packet_type
*pt
);
2418 void dev_add_offload(struct packet_offload
*po
);
2419 void dev_remove_offload(struct packet_offload
*po
);
2421 int dev_get_iflink(const struct net_device
*dev
);
2422 int dev_fill_metadata_dst(struct net_device
*dev
, struct sk_buff
*skb
);
2423 struct net_device
*__dev_get_by_flags(struct net
*net
, unsigned short flags
,
2424 unsigned short mask
);
2425 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
2426 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
2427 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
2428 int dev_alloc_name(struct net_device
*dev
, const char *name
);
2429 int dev_open(struct net_device
*dev
);
2430 void dev_close(struct net_device
*dev
);
2431 void dev_close_many(struct list_head
*head
, bool unlink
);
2432 void dev_disable_lro(struct net_device
*dev
);
2433 int dev_loopback_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*newskb
);
2434 int dev_queue_xmit(struct sk_buff
*skb
);
2435 int dev_queue_xmit_accel(struct sk_buff
*skb
, void *accel_priv
);
2436 int register_netdevice(struct net_device
*dev
);
2437 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
2438 void unregister_netdevice_many(struct list_head
*head
);
2439 static inline void unregister_netdevice(struct net_device
*dev
)
2441 unregister_netdevice_queue(dev
, NULL
);
2444 int netdev_refcnt_read(const struct net_device
*dev
);
2445 void free_netdev(struct net_device
*dev
);
2446 void netdev_freemem(struct net_device
*dev
);
2447 void synchronize_net(void);
2448 int init_dummy_netdev(struct net_device
*dev
);
2450 DECLARE_PER_CPU(int, xmit_recursion
);
2451 #define XMIT_RECURSION_LIMIT 10
2453 static inline int dev_recursion_level(void)
2455 return this_cpu_read(xmit_recursion
);
2458 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
2459 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
2460 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
2461 struct net_device
*dev_get_by_napi_id(unsigned int napi_id
);
2462 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
2463 int dev_restart(struct net_device
*dev
);
2464 int skb_gro_receive(struct sk_buff
**head
, struct sk_buff
*skb
);
2466 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
2468 return NAPI_GRO_CB(skb
)->data_offset
;
2471 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
2473 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
2476 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
2478 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2481 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2482 unsigned int offset
)
2484 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2487 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2489 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2492 static inline void skb_gro_frag0_invalidate(struct sk_buff
*skb
)
2494 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2495 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2498 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2499 unsigned int offset
)
2501 if (!pskb_may_pull(skb
, hlen
))
2504 skb_gro_frag0_invalidate(skb
);
2505 return skb
->data
+ offset
;
2508 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2510 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2511 skb_network_offset(skb
);
2514 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2515 const void *start
, unsigned int len
)
2517 if (NAPI_GRO_CB(skb
)->csum_valid
)
2518 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2519 csum_partial(start
, len
, 0));
2522 /* GRO checksum functions. These are logical equivalents of the normal
2523 * checksum functions (in skbuff.h) except that they operate on the GRO
2524 * offsets and fields in sk_buff.
2527 __sum16
__skb_gro_checksum_complete(struct sk_buff
*skb
);
2529 static inline bool skb_at_gro_remcsum_start(struct sk_buff
*skb
)
2531 return (NAPI_GRO_CB(skb
)->gro_remcsum_start
== skb_gro_offset(skb
));
2534 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff
*skb
,
2538 return ((skb
->ip_summed
!= CHECKSUM_PARTIAL
||
2539 skb_checksum_start_offset(skb
) <
2540 skb_gro_offset(skb
)) &&
2541 !skb_at_gro_remcsum_start(skb
) &&
2542 NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2543 (!zero_okay
|| check
));
2546 static inline __sum16
__skb_gro_checksum_validate_complete(struct sk_buff
*skb
,
2549 if (NAPI_GRO_CB(skb
)->csum_valid
&&
2550 !csum_fold(csum_add(psum
, NAPI_GRO_CB(skb
)->csum
)))
2553 NAPI_GRO_CB(skb
)->csum
= psum
;
2555 return __skb_gro_checksum_complete(skb
);
2558 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff
*skb
)
2560 if (NAPI_GRO_CB(skb
)->csum_cnt
> 0) {
2561 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2562 NAPI_GRO_CB(skb
)->csum_cnt
--;
2564 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2565 * verified a new top level checksum or an encapsulated one
2566 * during GRO. This saves work if we fallback to normal path.
2568 __skb_incr_checksum_unnecessary(skb
);
2572 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2575 __sum16 __ret = 0; \
2576 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2577 __ret = __skb_gro_checksum_validate_complete(skb, \
2578 compute_pseudo(skb, proto)); \
2580 skb_gro_incr_csum_unnecessary(skb); \
2584 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2585 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2587 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2589 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2591 #define skb_gro_checksum_simple_validate(skb) \
2592 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2594 static inline bool __skb_gro_checksum_convert_check(struct sk_buff
*skb
)
2596 return (NAPI_GRO_CB(skb
)->csum_cnt
== 0 &&
2597 !NAPI_GRO_CB(skb
)->csum_valid
);
2600 static inline void __skb_gro_checksum_convert(struct sk_buff
*skb
,
2601 __sum16 check
, __wsum pseudo
)
2603 NAPI_GRO_CB(skb
)->csum
= ~pseudo
;
2604 NAPI_GRO_CB(skb
)->csum_valid
= 1;
2607 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2609 if (__skb_gro_checksum_convert_check(skb)) \
2610 __skb_gro_checksum_convert(skb, check, \
2611 compute_pseudo(skb, proto)); \
2614 struct gro_remcsum
{
2619 static inline void skb_gro_remcsum_init(struct gro_remcsum
*grc
)
2625 static inline void *skb_gro_remcsum_process(struct sk_buff
*skb
, void *ptr
,
2626 unsigned int off
, size_t hdrlen
,
2627 int start
, int offset
,
2628 struct gro_remcsum
*grc
,
2632 size_t plen
= hdrlen
+ max_t(size_t, offset
+ sizeof(u16
), start
);
2634 BUG_ON(!NAPI_GRO_CB(skb
)->csum_valid
);
2637 NAPI_GRO_CB(skb
)->gro_remcsum_start
= off
+ hdrlen
+ start
;
2641 ptr
= skb_gro_header_fast(skb
, off
);
2642 if (skb_gro_header_hard(skb
, off
+ plen
)) {
2643 ptr
= skb_gro_header_slow(skb
, off
+ plen
, off
);
2648 delta
= remcsum_adjust(ptr
+ hdrlen
, NAPI_GRO_CB(skb
)->csum
,
2651 /* Adjust skb->csum since we changed the packet */
2652 NAPI_GRO_CB(skb
)->csum
= csum_add(NAPI_GRO_CB(skb
)->csum
, delta
);
2654 grc
->offset
= off
+ hdrlen
+ offset
;
2660 static inline void skb_gro_remcsum_cleanup(struct sk_buff
*skb
,
2661 struct gro_remcsum
*grc
)
2664 size_t plen
= grc
->offset
+ sizeof(u16
);
2669 ptr
= skb_gro_header_fast(skb
, grc
->offset
);
2670 if (skb_gro_header_hard(skb
, grc
->offset
+ sizeof(u16
))) {
2671 ptr
= skb_gro_header_slow(skb
, plen
, grc
->offset
);
2676 remcsum_unadjust((__sum16
*)ptr
, grc
->delta
);
2679 #ifdef CONFIG_XFRM_OFFLOAD
2680 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
**pp
, int flush
)
2682 if (PTR_ERR(pp
) != -EINPROGRESS
)
2683 NAPI_GRO_CB(skb
)->flush
|= flush
;
2686 static inline void skb_gro_flush_final(struct sk_buff
*skb
, struct sk_buff
**pp
, int flush
)
2688 NAPI_GRO_CB(skb
)->flush
|= flush
;
2692 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2693 unsigned short type
,
2694 const void *daddr
, const void *saddr
,
2697 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2700 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2703 static inline int dev_parse_header(const struct sk_buff
*skb
,
2704 unsigned char *haddr
)
2706 const struct net_device
*dev
= skb
->dev
;
2708 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2710 return dev
->header_ops
->parse(skb
, haddr
);
2713 /* ll_header must have at least hard_header_len allocated */
2714 static inline bool dev_validate_header(const struct net_device
*dev
,
2715 char *ll_header
, int len
)
2717 if (likely(len
>= dev
->hard_header_len
))
2719 if (len
< dev
->min_header_len
)
2722 if (capable(CAP_SYS_RAWIO
)) {
2723 memset(ll_header
+ len
, 0, dev
->hard_header_len
- len
);
2727 if (dev
->header_ops
&& dev
->header_ops
->validate
)
2728 return dev
->header_ops
->validate(ll_header
, len
);
2733 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
2734 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2735 static inline int unregister_gifconf(unsigned int family
)
2737 return register_gifconf(family
, NULL
);
2740 #ifdef CONFIG_NET_FLOW_LIMIT
2741 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2742 struct sd_flow_limit
{
2744 unsigned int num_buckets
;
2745 unsigned int history_head
;
2746 u16 history
[FLOW_LIMIT_HISTORY
];
2750 extern int netdev_flow_limit_table_len
;
2751 #endif /* CONFIG_NET_FLOW_LIMIT */
2754 * Incoming packets are placed on per-CPU queues
2756 struct softnet_data
{
2757 struct list_head poll_list
;
2758 struct sk_buff_head process_queue
;
2761 unsigned int processed
;
2762 unsigned int time_squeeze
;
2763 unsigned int received_rps
;
2765 struct softnet_data
*rps_ipi_list
;
2767 #ifdef CONFIG_NET_FLOW_LIMIT
2768 struct sd_flow_limit __rcu
*flow_limit
;
2770 struct Qdisc
*output_queue
;
2771 struct Qdisc
**output_queue_tailp
;
2772 struct sk_buff
*completion_queue
;
2775 /* input_queue_head should be written by cpu owning this struct,
2776 * and only read by other cpus. Worth using a cache line.
2778 unsigned int input_queue_head ____cacheline_aligned_in_smp
;
2780 /* Elements below can be accessed between CPUs for RPS/RFS */
2781 call_single_data_t csd ____cacheline_aligned_in_smp
;
2782 struct softnet_data
*rps_ipi_next
;
2784 unsigned int input_queue_tail
;
2786 unsigned int dropped
;
2787 struct sk_buff_head input_pkt_queue
;
2788 struct napi_struct backlog
;
2792 static inline void input_queue_head_incr(struct softnet_data
*sd
)
2795 sd
->input_queue_head
++;
2799 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
2800 unsigned int *qtail
)
2803 *qtail
= ++sd
->input_queue_tail
;
2807 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
2809 void __netif_schedule(struct Qdisc
*q
);
2810 void netif_schedule_queue(struct netdev_queue
*txq
);
2812 static inline void netif_tx_schedule_all(struct net_device
*dev
)
2816 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2817 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
2820 static __always_inline
void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
2822 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2826 * netif_start_queue - allow transmit
2827 * @dev: network device
2829 * Allow upper layers to call the device hard_start_xmit routine.
2831 static inline void netif_start_queue(struct net_device
*dev
)
2833 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
2836 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
2840 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2841 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2842 netif_tx_start_queue(txq
);
2846 void netif_tx_wake_queue(struct netdev_queue
*dev_queue
);
2849 * netif_wake_queue - restart transmit
2850 * @dev: network device
2852 * Allow upper layers to call the device hard_start_xmit routine.
2853 * Used for flow control when transmit resources are available.
2855 static inline void netif_wake_queue(struct net_device
*dev
)
2857 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
2860 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
2864 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2865 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2866 netif_tx_wake_queue(txq
);
2870 static __always_inline
void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
2872 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2876 * netif_stop_queue - stop transmitted packets
2877 * @dev: network device
2879 * Stop upper layers calling the device hard_start_xmit routine.
2880 * Used for flow control when transmit resources are unavailable.
2882 static inline void netif_stop_queue(struct net_device
*dev
)
2884 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2887 void netif_tx_stop_all_queues(struct net_device
*dev
);
2889 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2891 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2895 * netif_queue_stopped - test if transmit queue is flowblocked
2896 * @dev: network device
2898 * Test if transmit queue on device is currently unable to send.
2900 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2902 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2905 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2907 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2911 netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2913 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2917 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue
*dev_queue
)
2919 return dev_queue
->state
& QUEUE_STATE_DRV_XOFF_OR_FROZEN
;
2923 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2924 * @dev_queue: pointer to transmit queue
2926 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2927 * to give appropriate hint to the CPU.
2929 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue
*dev_queue
)
2932 prefetchw(&dev_queue
->dql
.num_queued
);
2937 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2938 * @dev_queue: pointer to transmit queue
2940 * BQL enabled drivers might use this helper in their TX completion path,
2941 * to give appropriate hint to the CPU.
2943 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue
*dev_queue
)
2946 prefetchw(&dev_queue
->dql
.limit
);
2950 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2954 dql_queued(&dev_queue
->dql
, bytes
);
2956 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2959 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2962 * The XOFF flag must be set before checking the dql_avail below,
2963 * because in netdev_tx_completed_queue we update the dql_completed
2964 * before checking the XOFF flag.
2968 /* check again in case another CPU has just made room avail */
2969 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2970 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2975 * netdev_sent_queue - report the number of bytes queued to hardware
2976 * @dev: network device
2977 * @bytes: number of bytes queued to the hardware device queue
2979 * Report the number of bytes queued for sending/completion to the network
2980 * device hardware queue. @bytes should be a good approximation and should
2981 * exactly match netdev_completed_queue() @bytes
2983 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2985 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2988 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2989 unsigned int pkts
, unsigned int bytes
)
2992 if (unlikely(!bytes
))
2995 dql_completed(&dev_queue
->dql
, bytes
);
2998 * Without the memory barrier there is a small possiblity that
2999 * netdev_tx_sent_queue will miss the update and cause the queue to
3000 * be stopped forever
3004 if (dql_avail(&dev_queue
->dql
) < 0)
3007 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
3008 netif_schedule_queue(dev_queue
);
3013 * netdev_completed_queue - report bytes and packets completed by device
3014 * @dev: network device
3015 * @pkts: actual number of packets sent over the medium
3016 * @bytes: actual number of bytes sent over the medium
3018 * Report the number of bytes and packets transmitted by the network device
3019 * hardware queue over the physical medium, @bytes must exactly match the
3020 * @bytes amount passed to netdev_sent_queue()
3022 static inline void netdev_completed_queue(struct net_device
*dev
,
3023 unsigned int pkts
, unsigned int bytes
)
3025 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
3028 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
3031 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
3037 * netdev_reset_queue - reset the packets and bytes count of a network device
3038 * @dev_queue: network device
3040 * Reset the bytes and packet count of a network device and clear the
3041 * software flow control OFF bit for this network device
3043 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
3045 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
3049 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3050 * @dev: network device
3051 * @queue_index: given tx queue index
3053 * Returns 0 if given tx queue index >= number of device tx queues,
3054 * otherwise returns the originally passed tx queue index.
3056 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
3058 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
3059 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3060 dev
->name
, queue_index
,
3061 dev
->real_num_tx_queues
);
3069 * netif_running - test if up
3070 * @dev: network device
3072 * Test if the device has been brought up.
3074 static inline bool netif_running(const struct net_device
*dev
)
3076 return test_bit(__LINK_STATE_START
, &dev
->state
);
3080 * Routines to manage the subqueues on a device. We only need start,
3081 * stop, and a check if it's stopped. All other device management is
3082 * done at the overall netdevice level.
3083 * Also test the device if we're multiqueue.
3087 * netif_start_subqueue - allow sending packets on subqueue
3088 * @dev: network device
3089 * @queue_index: sub queue index
3091 * Start individual transmit queue of a device with multiple transmit queues.
3093 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
3095 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3097 netif_tx_start_queue(txq
);
3101 * netif_stop_subqueue - stop sending packets on subqueue
3102 * @dev: network device
3103 * @queue_index: sub queue index
3105 * Stop individual transmit queue of a device with multiple transmit queues.
3107 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
3109 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3110 netif_tx_stop_queue(txq
);
3114 * netif_subqueue_stopped - test status of subqueue
3115 * @dev: network device
3116 * @queue_index: sub queue index
3118 * Check individual transmit queue of a device with multiple transmit queues.
3120 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
3123 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3125 return netif_tx_queue_stopped(txq
);
3128 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
3129 struct sk_buff
*skb
)
3131 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
3135 * netif_wake_subqueue - allow sending packets on subqueue
3136 * @dev: network device
3137 * @queue_index: sub queue index
3139 * Resume individual transmit queue of a device with multiple transmit queues.
3141 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
3143 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
3145 netif_tx_wake_queue(txq
);
3149 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
3152 static inline int netif_set_xps_queue(struct net_device
*dev
,
3153 const struct cpumask
*mask
,
3160 u16
__skb_tx_hash(const struct net_device
*dev
, struct sk_buff
*skb
,
3161 unsigned int num_tx_queues
);
3164 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
3165 * as a distribution range limit for the returned value.
3167 static inline u16
skb_tx_hash(const struct net_device
*dev
,
3168 struct sk_buff
*skb
)
3170 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
3174 * netif_is_multiqueue - test if device has multiple transmit queues
3175 * @dev: network device
3177 * Check if device has multiple transmit queues
3179 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
3181 return dev
->num_tx_queues
> 1;
3184 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
3187 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
3189 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
3197 static inline unsigned int get_netdev_rx_queue_index(
3198 struct netdev_rx_queue
*queue
)
3200 struct net_device
*dev
= queue
->dev
;
3201 int index
= queue
- dev
->_rx
;
3203 BUG_ON(index
>= dev
->num_rx_queues
);
3208 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3209 int netif_get_num_default_rss_queues(void);
3211 enum skb_free_reason
{
3212 SKB_REASON_CONSUMED
,
3216 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
3217 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
3220 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3221 * interrupt context or with hardware interrupts being disabled.
3222 * (in_irq() || irqs_disabled())
3224 * We provide four helpers that can be used in following contexts :
3226 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3227 * replacing kfree_skb(skb)
3229 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3230 * Typically used in place of consume_skb(skb) in TX completion path
3232 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3233 * replacing kfree_skb(skb)
3235 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3236 * and consumed a packet. Used in place of consume_skb(skb)
3238 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
3240 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
3243 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
3245 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
3248 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
3250 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
3253 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
3255 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
3258 void generic_xdp_tx(struct sk_buff
*skb
, struct bpf_prog
*xdp_prog
);
3259 int do_xdp_generic(struct bpf_prog
*xdp_prog
, struct sk_buff
*skb
);
3260 int netif_rx(struct sk_buff
*skb
);
3261 int netif_rx_ni(struct sk_buff
*skb
);
3262 int netif_receive_skb(struct sk_buff
*skb
);
3263 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
3264 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
3265 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
3266 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
3267 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
3268 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
3270 static inline void napi_free_frags(struct napi_struct
*napi
)
3272 kfree_skb(napi
->skb
);
3276 bool netdev_is_rx_handler_busy(struct net_device
*dev
);
3277 int netdev_rx_handler_register(struct net_device
*dev
,
3278 rx_handler_func_t
*rx_handler
,
3279 void *rx_handler_data
);
3280 void netdev_rx_handler_unregister(struct net_device
*dev
);
3282 bool dev_valid_name(const char *name
);
3283 int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
3284 int dev_ethtool(struct net
*net
, struct ifreq
*);
3285 unsigned int dev_get_flags(const struct net_device
*);
3286 int __dev_change_flags(struct net_device
*, unsigned int flags
);
3287 int dev_change_flags(struct net_device
*, unsigned int);
3288 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
3289 unsigned int gchanges
);
3290 int dev_change_name(struct net_device
*, const char *);
3291 int dev_set_alias(struct net_device
*, const char *, size_t);
3292 int dev_get_alias(const struct net_device
*, char *, size_t);
3293 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
3294 int __dev_set_mtu(struct net_device
*, int);
3295 int dev_set_mtu(struct net_device
*, int);
3296 void dev_set_group(struct net_device
*, int);
3297 int dev_set_mac_address(struct net_device
*, struct sockaddr
*);
3298 int dev_change_carrier(struct net_device
*, bool new_carrier
);
3299 int dev_get_phys_port_id(struct net_device
*dev
,
3300 struct netdev_phys_item_id
*ppid
);
3301 int dev_get_phys_port_name(struct net_device
*dev
,
3302 char *name
, size_t len
);
3303 int dev_change_proto_down(struct net_device
*dev
, bool proto_down
);
3304 struct sk_buff
*validate_xmit_skb_list(struct sk_buff
*skb
, struct net_device
*dev
);
3305 struct sk_buff
*dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
3306 struct netdev_queue
*txq
, int *ret
);
3308 typedef int (*xdp_op_t
)(struct net_device
*dev
, struct netdev_xdp
*xdp
);
3309 int dev_change_xdp_fd(struct net_device
*dev
, struct netlink_ext_ack
*extack
,
3311 u8
__dev_xdp_attached(struct net_device
*dev
, xdp_op_t xdp_op
, u32
*prog_id
);
3313 int __dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3314 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
3315 bool is_skb_forwardable(const struct net_device
*dev
,
3316 const struct sk_buff
*skb
);
3318 static __always_inline
int ____dev_forward_skb(struct net_device
*dev
,
3319 struct sk_buff
*skb
)
3321 if (skb_orphan_frags(skb
, GFP_ATOMIC
) ||
3322 unlikely(!is_skb_forwardable(dev
, skb
))) {
3323 atomic_long_inc(&dev
->rx_dropped
);
3328 skb_scrub_packet(skb
, true);
3333 void dev_queue_xmit_nit(struct sk_buff
*skb
, struct net_device
*dev
);
3335 extern int netdev_budget
;
3336 extern unsigned int netdev_budget_usecs
;
3338 /* Called by rtnetlink.c:rtnl_unlock() */
3339 void netdev_run_todo(void);
3342 * dev_put - release reference to device
3343 * @dev: network device
3345 * Release reference to device to allow it to be freed.
3347 static inline void dev_put(struct net_device
*dev
)
3349 this_cpu_dec(*dev
->pcpu_refcnt
);
3353 * dev_hold - get reference to device
3354 * @dev: network device
3356 * Hold reference to device to keep it from being freed.
3358 static inline void dev_hold(struct net_device
*dev
)
3360 this_cpu_inc(*dev
->pcpu_refcnt
);
3363 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3364 * and _off may be called from IRQ context, but it is caller
3365 * who is responsible for serialization of these calls.
3367 * The name carrier is inappropriate, these functions should really be
3368 * called netif_lowerlayer_*() because they represent the state of any
3369 * kind of lower layer not just hardware media.
3372 void linkwatch_init_dev(struct net_device
*dev
);
3373 void linkwatch_fire_event(struct net_device
*dev
);
3374 void linkwatch_forget_dev(struct net_device
*dev
);
3377 * netif_carrier_ok - test if carrier present
3378 * @dev: network device
3380 * Check if carrier is present on device
3382 static inline bool netif_carrier_ok(const struct net_device
*dev
)
3384 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
3387 unsigned long dev_trans_start(struct net_device
*dev
);
3389 void __netdev_watchdog_up(struct net_device
*dev
);
3391 void netif_carrier_on(struct net_device
*dev
);
3393 void netif_carrier_off(struct net_device
*dev
);
3396 * netif_dormant_on - mark device as dormant.
3397 * @dev: network device
3399 * Mark device as dormant (as per RFC2863).
3401 * The dormant state indicates that the relevant interface is not
3402 * actually in a condition to pass packets (i.e., it is not 'up') but is
3403 * in a "pending" state, waiting for some external event. For "on-
3404 * demand" interfaces, this new state identifies the situation where the
3405 * interface is waiting for events to place it in the up state.
3407 static inline void netif_dormant_on(struct net_device
*dev
)
3409 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3410 linkwatch_fire_event(dev
);
3414 * netif_dormant_off - set device as not dormant.
3415 * @dev: network device
3417 * Device is not in dormant state.
3419 static inline void netif_dormant_off(struct net_device
*dev
)
3421 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
3422 linkwatch_fire_event(dev
);
3426 * netif_dormant - test if device is dormant
3427 * @dev: network device
3429 * Check if device is dormant.
3431 static inline bool netif_dormant(const struct net_device
*dev
)
3433 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
3438 * netif_oper_up - test if device is operational
3439 * @dev: network device
3441 * Check if carrier is operational
3443 static inline bool netif_oper_up(const struct net_device
*dev
)
3445 return (dev
->operstate
== IF_OPER_UP
||
3446 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
3450 * netif_device_present - is device available or removed
3451 * @dev: network device
3453 * Check if device has not been removed from system.
3455 static inline bool netif_device_present(struct net_device
*dev
)
3457 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
3460 void netif_device_detach(struct net_device
*dev
);
3462 void netif_device_attach(struct net_device
*dev
);
3465 * Network interface message level settings
3469 NETIF_MSG_DRV
= 0x0001,
3470 NETIF_MSG_PROBE
= 0x0002,
3471 NETIF_MSG_LINK
= 0x0004,
3472 NETIF_MSG_TIMER
= 0x0008,
3473 NETIF_MSG_IFDOWN
= 0x0010,
3474 NETIF_MSG_IFUP
= 0x0020,
3475 NETIF_MSG_RX_ERR
= 0x0040,
3476 NETIF_MSG_TX_ERR
= 0x0080,
3477 NETIF_MSG_TX_QUEUED
= 0x0100,
3478 NETIF_MSG_INTR
= 0x0200,
3479 NETIF_MSG_TX_DONE
= 0x0400,
3480 NETIF_MSG_RX_STATUS
= 0x0800,
3481 NETIF_MSG_PKTDATA
= 0x1000,
3482 NETIF_MSG_HW
= 0x2000,
3483 NETIF_MSG_WOL
= 0x4000,
3486 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3487 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3488 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3489 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3490 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3491 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3492 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3493 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3494 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3495 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3496 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3497 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3498 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3499 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3500 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3502 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
3505 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
3506 return default_msg_enable_bits
;
3507 if (debug_value
== 0) /* no output */
3509 /* set low N bits */
3510 return (1 << debug_value
) - 1;
3513 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
3515 spin_lock(&txq
->_xmit_lock
);
3516 txq
->xmit_lock_owner
= cpu
;
3519 static inline bool __netif_tx_acquire(struct netdev_queue
*txq
)
3521 __acquire(&txq
->_xmit_lock
);
3525 static inline void __netif_tx_release(struct netdev_queue
*txq
)
3527 __release(&txq
->_xmit_lock
);
3530 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
3532 spin_lock_bh(&txq
->_xmit_lock
);
3533 txq
->xmit_lock_owner
= smp_processor_id();
3536 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
3538 bool ok
= spin_trylock(&txq
->_xmit_lock
);
3540 txq
->xmit_lock_owner
= smp_processor_id();
3544 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
3546 txq
->xmit_lock_owner
= -1;
3547 spin_unlock(&txq
->_xmit_lock
);
3550 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
3552 txq
->xmit_lock_owner
= -1;
3553 spin_unlock_bh(&txq
->_xmit_lock
);
3556 static inline void txq_trans_update(struct netdev_queue
*txq
)
3558 if (txq
->xmit_lock_owner
!= -1)
3559 txq
->trans_start
= jiffies
;
3562 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3563 static inline void netif_trans_update(struct net_device
*dev
)
3565 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, 0);
3567 if (txq
->trans_start
!= jiffies
)
3568 txq
->trans_start
= jiffies
;
3572 * netif_tx_lock - grab network device transmit lock
3573 * @dev: network device
3575 * Get network device transmit lock
3577 static inline void netif_tx_lock(struct net_device
*dev
)
3582 spin_lock(&dev
->tx_global_lock
);
3583 cpu
= smp_processor_id();
3584 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3585 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3587 /* We are the only thread of execution doing a
3588 * freeze, but we have to grab the _xmit_lock in
3589 * order to synchronize with threads which are in
3590 * the ->hard_start_xmit() handler and already
3591 * checked the frozen bit.
3593 __netif_tx_lock(txq
, cpu
);
3594 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3595 __netif_tx_unlock(txq
);
3599 static inline void netif_tx_lock_bh(struct net_device
*dev
)
3605 static inline void netif_tx_unlock(struct net_device
*dev
)
3609 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3610 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3612 /* No need to grab the _xmit_lock here. If the
3613 * queue is not stopped for another reason, we
3616 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
3617 netif_schedule_queue(txq
);
3619 spin_unlock(&dev
->tx_global_lock
);
3622 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
3624 netif_tx_unlock(dev
);
3628 #define HARD_TX_LOCK(dev, txq, cpu) { \
3629 if ((dev->features & NETIF_F_LLTX) == 0) { \
3630 __netif_tx_lock(txq, cpu); \
3632 __netif_tx_acquire(txq); \
3636 #define HARD_TX_TRYLOCK(dev, txq) \
3637 (((dev->features & NETIF_F_LLTX) == 0) ? \
3638 __netif_tx_trylock(txq) : \
3639 __netif_tx_acquire(txq))
3641 #define HARD_TX_UNLOCK(dev, txq) { \
3642 if ((dev->features & NETIF_F_LLTX) == 0) { \
3643 __netif_tx_unlock(txq); \
3645 __netif_tx_release(txq); \
3649 static inline void netif_tx_disable(struct net_device
*dev
)
3655 cpu
= smp_processor_id();
3656 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
3657 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
3659 __netif_tx_lock(txq
, cpu
);
3660 netif_tx_stop_queue(txq
);
3661 __netif_tx_unlock(txq
);
3666 static inline void netif_addr_lock(struct net_device
*dev
)
3668 spin_lock(&dev
->addr_list_lock
);
3671 static inline void netif_addr_lock_nested(struct net_device
*dev
)
3673 int subclass
= SINGLE_DEPTH_NESTING
;
3675 if (dev
->netdev_ops
->ndo_get_lock_subclass
)
3676 subclass
= dev
->netdev_ops
->ndo_get_lock_subclass(dev
);
3678 spin_lock_nested(&dev
->addr_list_lock
, subclass
);
3681 static inline void netif_addr_lock_bh(struct net_device
*dev
)
3683 spin_lock_bh(&dev
->addr_list_lock
);
3686 static inline void netif_addr_unlock(struct net_device
*dev
)
3688 spin_unlock(&dev
->addr_list_lock
);
3691 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
3693 spin_unlock_bh(&dev
->addr_list_lock
);
3697 * dev_addrs walker. Should be used only for read access. Call with
3698 * rcu_read_lock held.
3700 #define for_each_dev_addr(dev, ha) \
3701 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3703 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3705 void ether_setup(struct net_device
*dev
);
3707 /* Support for loadable net-drivers */
3708 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
3709 unsigned char name_assign_type
,
3710 void (*setup
)(struct net_device
*),
3711 unsigned int txqs
, unsigned int rxqs
);
3712 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3713 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3715 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3716 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3719 int register_netdev(struct net_device
*dev
);
3720 void unregister_netdev(struct net_device
*dev
);
3722 /* General hardware address lists handling functions */
3723 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
3724 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3725 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
3726 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3727 int __hw_addr_sync_dev(struct netdev_hw_addr_list
*list
,
3728 struct net_device
*dev
,
3729 int (*sync
)(struct net_device
*, const unsigned char *),
3730 int (*unsync
)(struct net_device
*,
3731 const unsigned char *));
3732 void __hw_addr_unsync_dev(struct netdev_hw_addr_list
*list
,
3733 struct net_device
*dev
,
3734 int (*unsync
)(struct net_device
*,
3735 const unsigned char *));
3736 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
3738 /* Functions used for device addresses handling */
3739 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
3740 unsigned char addr_type
);
3741 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
3742 unsigned char addr_type
);
3743 void dev_addr_flush(struct net_device
*dev
);
3744 int dev_addr_init(struct net_device
*dev
);
3746 /* Functions used for unicast addresses handling */
3747 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
3748 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3749 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
3750 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
3751 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3752 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
3753 void dev_uc_flush(struct net_device
*dev
);
3754 void dev_uc_init(struct net_device
*dev
);
3757 * __dev_uc_sync - Synchonize device's unicast list
3758 * @dev: device to sync
3759 * @sync: function to call if address should be added
3760 * @unsync: function to call if address should be removed
3762 * Add newly added addresses to the interface, and release
3763 * addresses that have been deleted.
3765 static inline int __dev_uc_sync(struct net_device
*dev
,
3766 int (*sync
)(struct net_device
*,
3767 const unsigned char *),
3768 int (*unsync
)(struct net_device
*,
3769 const unsigned char *))
3771 return __hw_addr_sync_dev(&dev
->uc
, dev
, sync
, unsync
);
3775 * __dev_uc_unsync - Remove synchronized addresses from device
3776 * @dev: device to sync
3777 * @unsync: function to call if address should be removed
3779 * Remove all addresses that were added to the device by dev_uc_sync().
3781 static inline void __dev_uc_unsync(struct net_device
*dev
,
3782 int (*unsync
)(struct net_device
*,
3783 const unsigned char *))
3785 __hw_addr_unsync_dev(&dev
->uc
, dev
, unsync
);
3788 /* Functions used for multicast addresses handling */
3789 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
3790 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
3791 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3792 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
3793 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
3794 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
3795 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3796 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
3797 void dev_mc_flush(struct net_device
*dev
);
3798 void dev_mc_init(struct net_device
*dev
);
3801 * __dev_mc_sync - Synchonize device's multicast list
3802 * @dev: device to sync
3803 * @sync: function to call if address should be added
3804 * @unsync: function to call if address should be removed
3806 * Add newly added addresses to the interface, and release
3807 * addresses that have been deleted.
3809 static inline int __dev_mc_sync(struct net_device
*dev
,
3810 int (*sync
)(struct net_device
*,
3811 const unsigned char *),
3812 int (*unsync
)(struct net_device
*,
3813 const unsigned char *))
3815 return __hw_addr_sync_dev(&dev
->mc
, dev
, sync
, unsync
);
3819 * __dev_mc_unsync - Remove synchronized addresses from device
3820 * @dev: device to sync
3821 * @unsync: function to call if address should be removed
3823 * Remove all addresses that were added to the device by dev_mc_sync().
3825 static inline void __dev_mc_unsync(struct net_device
*dev
,
3826 int (*unsync
)(struct net_device
*,
3827 const unsigned char *))
3829 __hw_addr_unsync_dev(&dev
->mc
, dev
, unsync
);
3832 /* Functions used for secondary unicast and multicast support */
3833 void dev_set_rx_mode(struct net_device
*dev
);
3834 void __dev_set_rx_mode(struct net_device
*dev
);
3835 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
3836 int dev_set_allmulti(struct net_device
*dev
, int inc
);
3837 void netdev_state_change(struct net_device
*dev
);
3838 void netdev_notify_peers(struct net_device
*dev
);
3839 void netdev_features_change(struct net_device
*dev
);
3840 /* Load a device via the kmod */
3841 void dev_load(struct net
*net
, const char *name
);
3842 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
3843 struct rtnl_link_stats64
*storage
);
3844 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
3845 const struct net_device_stats
*netdev_stats
);
3847 extern int netdev_max_backlog
;
3848 extern int netdev_tstamp_prequeue
;
3849 extern int weight_p
;
3850 extern int dev_weight_rx_bias
;
3851 extern int dev_weight_tx_bias
;
3852 extern int dev_rx_weight
;
3853 extern int dev_tx_weight
;
3855 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
3856 struct net_device
*netdev_upper_get_next_dev_rcu(struct net_device
*dev
,
3857 struct list_head
**iter
);
3858 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
3859 struct list_head
**iter
);
3861 /* iterate through upper list, must be called under RCU read lock */
3862 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3863 for (iter = &(dev)->adj_list.upper, \
3864 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3866 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3868 int netdev_walk_all_upper_dev_rcu(struct net_device
*dev
,
3869 int (*fn
)(struct net_device
*upper_dev
,
3873 bool netdev_has_upper_dev_all_rcu(struct net_device
*dev
,
3874 struct net_device
*upper_dev
);
3876 bool netdev_has_any_upper_dev(struct net_device
*dev
);
3878 void *netdev_lower_get_next_private(struct net_device
*dev
,
3879 struct list_head
**iter
);
3880 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
3881 struct list_head
**iter
);
3883 #define netdev_for_each_lower_private(dev, priv, iter) \
3884 for (iter = (dev)->adj_list.lower.next, \
3885 priv = netdev_lower_get_next_private(dev, &(iter)); \
3887 priv = netdev_lower_get_next_private(dev, &(iter)))
3889 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3890 for (iter = &(dev)->adj_list.lower, \
3891 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3893 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3895 void *netdev_lower_get_next(struct net_device
*dev
,
3896 struct list_head
**iter
);
3898 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3899 for (iter = (dev)->adj_list.lower.next, \
3900 ldev = netdev_lower_get_next(dev, &(iter)); \
3902 ldev = netdev_lower_get_next(dev, &(iter)))
3904 struct net_device
*netdev_all_lower_get_next(struct net_device
*dev
,
3905 struct list_head
**iter
);
3906 struct net_device
*netdev_all_lower_get_next_rcu(struct net_device
*dev
,
3907 struct list_head
**iter
);
3909 int netdev_walk_all_lower_dev(struct net_device
*dev
,
3910 int (*fn
)(struct net_device
*lower_dev
,
3913 int netdev_walk_all_lower_dev_rcu(struct net_device
*dev
,
3914 int (*fn
)(struct net_device
*lower_dev
,
3918 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
3919 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
3920 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
3921 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
3922 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
,
3923 struct netlink_ext_ack
*extack
);
3924 int netdev_master_upper_dev_link(struct net_device
*dev
,
3925 struct net_device
*upper_dev
,
3926 void *upper_priv
, void *upper_info
,
3927 struct netlink_ext_ack
*extack
);
3928 void netdev_upper_dev_unlink(struct net_device
*dev
,
3929 struct net_device
*upper_dev
);
3930 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
3931 void *netdev_lower_dev_get_private(struct net_device
*dev
,
3932 struct net_device
*lower_dev
);
3933 void netdev_lower_state_changed(struct net_device
*lower_dev
,
3934 void *lower_state_info
);
3936 /* RSS keys are 40 or 52 bytes long */
3937 #define NETDEV_RSS_KEY_LEN 52
3938 extern u8 netdev_rss_key
[NETDEV_RSS_KEY_LEN
] __read_mostly
;
3939 void netdev_rss_key_fill(void *buffer
, size_t len
);
3941 int dev_get_nest_level(struct net_device
*dev
);
3942 int skb_checksum_help(struct sk_buff
*skb
);
3943 int skb_crc32c_csum_help(struct sk_buff
*skb
);
3944 int skb_csum_hwoffload_help(struct sk_buff
*skb
,
3945 const netdev_features_t features
);
3947 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
3948 netdev_features_t features
, bool tx_path
);
3949 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
3950 netdev_features_t features
);
3952 struct netdev_bonding_info
{
3957 struct netdev_notifier_bonding_info
{
3958 struct netdev_notifier_info info
; /* must be first */
3959 struct netdev_bonding_info bonding_info
;
3962 void netdev_bonding_info_change(struct net_device
*dev
,
3963 struct netdev_bonding_info
*bonding_info
);
3966 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
3968 return __skb_gso_segment(skb
, features
, true);
3970 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
3972 static inline bool can_checksum_protocol(netdev_features_t features
,
3975 if (protocol
== htons(ETH_P_FCOE
))
3976 return !!(features
& NETIF_F_FCOE_CRC
);
3978 /* Assume this is an IP checksum (not SCTP CRC) */
3980 if (features
& NETIF_F_HW_CSUM
) {
3981 /* Can checksum everything */
3986 case htons(ETH_P_IP
):
3987 return !!(features
& NETIF_F_IP_CSUM
);
3988 case htons(ETH_P_IPV6
):
3989 return !!(features
& NETIF_F_IPV6_CSUM
);
3996 void netdev_rx_csum_fault(struct net_device
*dev
);
3998 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
4002 /* rx skb timestamps */
4003 void net_enable_timestamp(void);
4004 void net_disable_timestamp(void);
4006 #ifdef CONFIG_PROC_FS
4007 int __init
dev_proc_init(void);
4009 #define dev_proc_init() 0
4012 static inline netdev_tx_t
__netdev_start_xmit(const struct net_device_ops
*ops
,
4013 struct sk_buff
*skb
, struct net_device
*dev
,
4016 skb
->xmit_more
= more
? 1 : 0;
4017 return ops
->ndo_start_xmit(skb
, dev
);
4020 static inline netdev_tx_t
netdev_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
4021 struct netdev_queue
*txq
, bool more
)
4023 const struct net_device_ops
*ops
= dev
->netdev_ops
;
4026 rc
= __netdev_start_xmit(ops
, skb
, dev
, more
);
4027 if (rc
== NETDEV_TX_OK
)
4028 txq_trans_update(txq
);
4033 int netdev_class_create_file_ns(const struct class_attribute
*class_attr
,
4035 void netdev_class_remove_file_ns(const struct class_attribute
*class_attr
,
4038 static inline int netdev_class_create_file(const struct class_attribute
*class_attr
)
4040 return netdev_class_create_file_ns(class_attr
, NULL
);
4043 static inline void netdev_class_remove_file(const struct class_attribute
*class_attr
)
4045 netdev_class_remove_file_ns(class_attr
, NULL
);
4048 extern const struct kobj_ns_type_operations net_ns_type_operations
;
4050 const char *netdev_drivername(const struct net_device
*dev
);
4052 void linkwatch_run_queue(void);
4054 static inline netdev_features_t
netdev_intersect_features(netdev_features_t f1
,
4055 netdev_features_t f2
)
4057 if ((f1
^ f2
) & NETIF_F_HW_CSUM
) {
4058 if (f1
& NETIF_F_HW_CSUM
)
4059 f1
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4061 f2
|= (NETIF_F_IP_CSUM
|NETIF_F_IPV6_CSUM
);
4067 static inline netdev_features_t
netdev_get_wanted_features(
4068 struct net_device
*dev
)
4070 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
4072 netdev_features_t
netdev_increment_features(netdev_features_t all
,
4073 netdev_features_t one
, netdev_features_t mask
);
4075 /* Allow TSO being used on stacked device :
4076 * Performing the GSO segmentation before last device
4077 * is a performance improvement.
4079 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
4080 netdev_features_t mask
)
4082 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
4085 int __netdev_update_features(struct net_device
*dev
);
4086 void netdev_update_features(struct net_device
*dev
);
4087 void netdev_change_features(struct net_device
*dev
);
4089 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
4090 struct net_device
*dev
);
4092 netdev_features_t
passthru_features_check(struct sk_buff
*skb
,
4093 struct net_device
*dev
,
4094 netdev_features_t features
);
4095 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
4097 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
4099 netdev_features_t feature
= (netdev_features_t
)gso_type
<< NETIF_F_GSO_SHIFT
;
4101 /* check flags correspondence */
4102 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
4103 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
4104 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
4105 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID
!= (NETIF_F_TSO_MANGLEID
>> NETIF_F_GSO_SHIFT
));
4106 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
4107 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
4108 BUILD_BUG_ON(SKB_GSO_GRE
!= (NETIF_F_GSO_GRE
>> NETIF_F_GSO_SHIFT
));
4109 BUILD_BUG_ON(SKB_GSO_GRE_CSUM
!= (NETIF_F_GSO_GRE_CSUM
>> NETIF_F_GSO_SHIFT
));
4110 BUILD_BUG_ON(SKB_GSO_IPXIP4
!= (NETIF_F_GSO_IPXIP4
>> NETIF_F_GSO_SHIFT
));
4111 BUILD_BUG_ON(SKB_GSO_IPXIP6
!= (NETIF_F_GSO_IPXIP6
>> NETIF_F_GSO_SHIFT
));
4112 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL
!= (NETIF_F_GSO_UDP_TUNNEL
>> NETIF_F_GSO_SHIFT
));
4113 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM
!= (NETIF_F_GSO_UDP_TUNNEL_CSUM
>> NETIF_F_GSO_SHIFT
));
4114 BUILD_BUG_ON(SKB_GSO_PARTIAL
!= (NETIF_F_GSO_PARTIAL
>> NETIF_F_GSO_SHIFT
));
4115 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM
!= (NETIF_F_GSO_TUNNEL_REMCSUM
>> NETIF_F_GSO_SHIFT
));
4116 BUILD_BUG_ON(SKB_GSO_SCTP
!= (NETIF_F_GSO_SCTP
>> NETIF_F_GSO_SHIFT
));
4117 BUILD_BUG_ON(SKB_GSO_ESP
!= (NETIF_F_GSO_ESP
>> NETIF_F_GSO_SHIFT
));
4119 return (features
& feature
) == feature
;
4122 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
4124 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
4125 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
4128 static inline bool netif_needs_gso(struct sk_buff
*skb
,
4129 netdev_features_t features
)
4131 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
4132 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
4133 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
4136 static inline void netif_set_gso_max_size(struct net_device
*dev
,
4139 dev
->gso_max_size
= size
;
4142 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
4143 int pulled_hlen
, u16 mac_offset
,
4146 skb
->protocol
= protocol
;
4147 skb
->encapsulation
= 1;
4148 skb_push(skb
, pulled_hlen
);
4149 skb_reset_transport_header(skb
);
4150 skb
->mac_header
= mac_offset
;
4151 skb
->network_header
= skb
->mac_header
+ mac_len
;
4152 skb
->mac_len
= mac_len
;
4155 static inline bool netif_is_macsec(const struct net_device
*dev
)
4157 return dev
->priv_flags
& IFF_MACSEC
;
4160 static inline bool netif_is_macvlan(const struct net_device
*dev
)
4162 return dev
->priv_flags
& IFF_MACVLAN
;
4165 static inline bool netif_is_macvlan_port(const struct net_device
*dev
)
4167 return dev
->priv_flags
& IFF_MACVLAN_PORT
;
4170 static inline bool netif_is_ipvlan(const struct net_device
*dev
)
4172 return dev
->priv_flags
& IFF_IPVLAN_SLAVE
;
4175 static inline bool netif_is_ipvlan_port(const struct net_device
*dev
)
4177 return dev
->priv_flags
& IFF_IPVLAN_MASTER
;
4180 static inline bool netif_is_bond_master(const struct net_device
*dev
)
4182 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
4185 static inline bool netif_is_bond_slave(const struct net_device
*dev
)
4187 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
4190 static inline bool netif_supports_nofcs(struct net_device
*dev
)
4192 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
4195 static inline bool netif_is_l3_master(const struct net_device
*dev
)
4197 return dev
->priv_flags
& IFF_L3MDEV_MASTER
;
4200 static inline bool netif_is_l3_slave(const struct net_device
*dev
)
4202 return dev
->priv_flags
& IFF_L3MDEV_SLAVE
;
4205 static inline bool netif_is_bridge_master(const struct net_device
*dev
)
4207 return dev
->priv_flags
& IFF_EBRIDGE
;
4210 static inline bool netif_is_bridge_port(const struct net_device
*dev
)
4212 return dev
->priv_flags
& IFF_BRIDGE_PORT
;
4215 static inline bool netif_is_ovs_master(const struct net_device
*dev
)
4217 return dev
->priv_flags
& IFF_OPENVSWITCH
;
4220 static inline bool netif_is_ovs_port(const struct net_device
*dev
)
4222 return dev
->priv_flags
& IFF_OVS_DATAPATH
;
4225 static inline bool netif_is_team_master(const struct net_device
*dev
)
4227 return dev
->priv_flags
& IFF_TEAM
;
4230 static inline bool netif_is_team_port(const struct net_device
*dev
)
4232 return dev
->priv_flags
& IFF_TEAM_PORT
;
4235 static inline bool netif_is_lag_master(const struct net_device
*dev
)
4237 return netif_is_bond_master(dev
) || netif_is_team_master(dev
);
4240 static inline bool netif_is_lag_port(const struct net_device
*dev
)
4242 return netif_is_bond_slave(dev
) || netif_is_team_port(dev
);
4245 static inline bool netif_is_rxfh_configured(const struct net_device
*dev
)
4247 return dev
->priv_flags
& IFF_RXFH_CONFIGURED
;
4250 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4251 static inline void netif_keep_dst(struct net_device
*dev
)
4253 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_XMIT_DST_RELEASE_PERM
);
4256 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4257 static inline bool netif_reduces_vlan_mtu(struct net_device
*dev
)
4259 /* TODO: reserve and use an additional IFF bit, if we get more users */
4260 return dev
->priv_flags
& IFF_MACSEC
;
4263 extern struct pernet_operations __net_initdata loopback_net_ops
;
4265 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4267 /* netdev_printk helpers, similar to dev_printk */
4269 static inline const char *netdev_name(const struct net_device
*dev
)
4271 if (!dev
->name
[0] || strchr(dev
->name
, '%'))
4272 return "(unnamed net_device)";
4276 static inline bool netdev_unregistering(const struct net_device
*dev
)
4278 return dev
->reg_state
== NETREG_UNREGISTERING
;
4281 static inline const char *netdev_reg_state(const struct net_device
*dev
)
4283 switch (dev
->reg_state
) {
4284 case NETREG_UNINITIALIZED
: return " (uninitialized)";
4285 case NETREG_REGISTERED
: return "";
4286 case NETREG_UNREGISTERING
: return " (unregistering)";
4287 case NETREG_UNREGISTERED
: return " (unregistered)";
4288 case NETREG_RELEASED
: return " (released)";
4289 case NETREG_DUMMY
: return " (dummy)";
4292 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev
->name
, dev
->reg_state
);
4293 return " (unknown)";
4297 void netdev_printk(const char *level
, const struct net_device
*dev
,
4298 const char *format
, ...);
4300 void netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
4302 void netdev_alert(const struct net_device
*dev
, const char *format
, ...);
4304 void netdev_crit(const struct net_device
*dev
, const char *format
, ...);
4306 void netdev_err(const struct net_device
*dev
, const char *format
, ...);
4308 void netdev_warn(const struct net_device
*dev
, const char *format
, ...);
4310 void netdev_notice(const struct net_device
*dev
, const char *format
, ...);
4312 void netdev_info(const struct net_device
*dev
, const char *format
, ...);
4314 #define MODULE_ALIAS_NETDEV(device) \
4315 MODULE_ALIAS("netdev-" device)
4317 #if defined(CONFIG_DYNAMIC_DEBUG)
4318 #define netdev_dbg(__dev, format, args...) \
4320 dynamic_netdev_dbg(__dev, format, ##args); \
4322 #elif defined(DEBUG)
4323 #define netdev_dbg(__dev, format, args...) \
4324 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4326 #define netdev_dbg(__dev, format, args...) \
4329 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4333 #if defined(VERBOSE_DEBUG)
4334 #define netdev_vdbg netdev_dbg
4337 #define netdev_vdbg(dev, format, args...) \
4340 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4346 * netdev_WARN() acts like dev_printk(), but with the key difference
4347 * of using a WARN/WARN_ON to get the message out, including the
4348 * file/line information and a backtrace.
4350 #define netdev_WARN(dev, format, args...) \
4351 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
4352 netdev_reg_state(dev), ##args)
4354 /* netif printk helpers, similar to netdev_printk */
4356 #define netif_printk(priv, type, level, dev, fmt, args...) \
4358 if (netif_msg_##type(priv)) \
4359 netdev_printk(level, (dev), fmt, ##args); \
4362 #define netif_level(level, priv, type, dev, fmt, args...) \
4364 if (netif_msg_##type(priv)) \
4365 netdev_##level(dev, fmt, ##args); \
4368 #define netif_emerg(priv, type, dev, fmt, args...) \
4369 netif_level(emerg, priv, type, dev, fmt, ##args)
4370 #define netif_alert(priv, type, dev, fmt, args...) \
4371 netif_level(alert, priv, type, dev, fmt, ##args)
4372 #define netif_crit(priv, type, dev, fmt, args...) \
4373 netif_level(crit, priv, type, dev, fmt, ##args)
4374 #define netif_err(priv, type, dev, fmt, args...) \
4375 netif_level(err, priv, type, dev, fmt, ##args)
4376 #define netif_warn(priv, type, dev, fmt, args...) \
4377 netif_level(warn, priv, type, dev, fmt, ##args)
4378 #define netif_notice(priv, type, dev, fmt, args...) \
4379 netif_level(notice, priv, type, dev, fmt, ##args)
4380 #define netif_info(priv, type, dev, fmt, args...) \
4381 netif_level(info, priv, type, dev, fmt, ##args)
4383 #if defined(CONFIG_DYNAMIC_DEBUG)
4384 #define netif_dbg(priv, type, netdev, format, args...) \
4386 if (netif_msg_##type(priv)) \
4387 dynamic_netdev_dbg(netdev, format, ##args); \
4389 #elif defined(DEBUG)
4390 #define netif_dbg(priv, type, dev, format, args...) \
4391 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4393 #define netif_dbg(priv, type, dev, format, args...) \
4396 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4401 /* if @cond then downgrade to debug, else print at @level */
4402 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4405 netif_dbg(priv, type, netdev, fmt, ##args); \
4407 netif_ ## level(priv, type, netdev, fmt, ##args); \
4410 #if defined(VERBOSE_DEBUG)
4411 #define netif_vdbg netif_dbg
4413 #define netif_vdbg(priv, type, dev, format, args...) \
4416 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4422 * The list of packet types we will receive (as opposed to discard)
4423 * and the routines to invoke.
4425 * Why 16. Because with 16 the only overlap we get on a hash of the
4426 * low nibble of the protocol value is RARP/SNAP/X.25.
4428 * NOTE: That is no longer true with the addition of VLAN tags. Not
4429 * sure which should go first, but I bet it won't make much
4430 * difference if we are running VLANs. The good news is that
4431 * this protocol won't be in the list unless compiled in, so
4432 * the average user (w/out VLANs) will not be adversely affected.
4448 #define PTYPE_HASH_SIZE (16)
4449 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4451 #endif /* _LINUX_NETDEVICE_H */