2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/timer.h>
29 #include <linux/bug.h>
30 #include <linux/delay.h>
31 #include <linux/atomic.h>
32 #include <linux/prefetch.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
53 #include <uapi/linux/if_bonding.h>
60 /* 802.15.4 specific */
64 void netdev_set_default_ethtool_ops(struct net_device *dev,
65 const struct ethtool_ops *ops);
67 /* Backlog congestion levels */
68 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
69 #define NET_RX_DROP 1 /* packet dropped */
72 * Transmit return codes: transmit return codes originate from three different
75 * - qdisc return codes
76 * - driver transmit return codes
79 * Drivers are allowed to return any one of those in their hard_start_xmit()
80 * function. Real network devices commonly used with qdiscs should only return
81 * the driver transmit return codes though - when qdiscs are used, the actual
82 * transmission happens asynchronously, so the value is not propagated to
83 * higher layers. Virtual network devices transmit synchronously, in this case
84 * the driver transmit return codes are consumed by dev_queue_xmit(), all
85 * others are propagated to higher layers.
88 /* qdisc ->enqueue() return codes. */
89 #define NET_XMIT_SUCCESS 0x00
90 #define NET_XMIT_DROP 0x01 /* skb dropped */
91 #define NET_XMIT_CN 0x02 /* congestion notification */
92 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
93 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
95 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
96 * indicates that the device will soon be dropping packets, or already drops
97 * some packets of the same priority; prompting us to send less aggressively. */
98 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
99 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
101 /* Driver transmit return codes */
102 #define NETDEV_TX_MASK 0xf0
105 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
106 NETDEV_TX_OK = 0x00, /* driver took care of packet */
107 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
108 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
110 typedef enum netdev_tx netdev_tx_t;
113 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
114 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
116 static inline bool dev_xmit_complete(int rc)
119 * Positive cases with an skb consumed by a driver:
120 * - successful transmission (rc == NETDEV_TX_OK)
121 * - error while transmitting (rc < 0)
122 * - error while queueing to a different device (rc & NET_XMIT_MASK)
124 if (likely(rc < NET_XMIT_MASK))
131 * Compute the worst case header length according to the protocols
135 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
136 # if defined(CONFIG_MAC80211_MESH)
137 # define LL_MAX_HEADER 128
139 # define LL_MAX_HEADER 96
142 # define LL_MAX_HEADER 32
145 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
146 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
147 #define MAX_HEADER LL_MAX_HEADER
149 #define MAX_HEADER (LL_MAX_HEADER + 48)
153 * Old network device statistics. Fields are native words
154 * (unsigned long) so they can be read and written atomically.
157 struct net_device_stats {
158 unsigned long rx_packets;
159 unsigned long tx_packets;
160 unsigned long rx_bytes;
161 unsigned long tx_bytes;
162 unsigned long rx_errors;
163 unsigned long tx_errors;
164 unsigned long rx_dropped;
165 unsigned long tx_dropped;
166 unsigned long multicast;
167 unsigned long collisions;
168 unsigned long rx_length_errors;
169 unsigned long rx_over_errors;
170 unsigned long rx_crc_errors;
171 unsigned long rx_frame_errors;
172 unsigned long rx_fifo_errors;
173 unsigned long rx_missed_errors;
174 unsigned long tx_aborted_errors;
175 unsigned long tx_carrier_errors;
176 unsigned long tx_fifo_errors;
177 unsigned long tx_heartbeat_errors;
178 unsigned long tx_window_errors;
179 unsigned long rx_compressed;
180 unsigned long tx_compressed;
184 #include <linux/cache.h>
185 #include <linux/skbuff.h>
188 #include <linux/static_key.h>
189 extern struct static_key rps_needed;
196 struct netdev_hw_addr {
197 struct list_head list;
198 unsigned char addr[MAX_ADDR_LEN];
200 #define NETDEV_HW_ADDR_T_LAN 1
201 #define NETDEV_HW_ADDR_T_SAN 2
202 #define NETDEV_HW_ADDR_T_SLAVE 3
203 #define NETDEV_HW_ADDR_T_UNICAST 4
204 #define NETDEV_HW_ADDR_T_MULTICAST 5
209 struct rcu_head rcu_head;
212 struct netdev_hw_addr_list {
213 struct list_head list;
217 #define netdev_hw_addr_list_count(l) ((l)->count)
218 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
219 #define netdev_hw_addr_list_for_each(ha, l) \
220 list_for_each_entry(ha, &(l)->list, list)
222 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
223 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
224 #define netdev_for_each_uc_addr(ha, dev) \
225 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
227 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
228 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
229 #define netdev_for_each_mc_addr(ha, dev) \
230 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
237 /* cached hardware header; allow for machine alignment needs. */
238 #define HH_DATA_MOD 16
239 #define HH_DATA_OFF(__len) \
240 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
241 #define HH_DATA_ALIGN(__len) \
242 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
243 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
246 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
248 * dev->hard_header_len ? (dev->hard_header_len +
249 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
251 * We could use other alignment values, but we must maintain the
252 * relationship HH alignment <= LL alignment.
254 #define LL_RESERVED_SPACE(dev) \
255 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
256 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
257 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
260 int (*create) (struct sk_buff *skb, struct net_device *dev,
261 unsigned short type, const void *daddr,
262 const void *saddr, unsigned int len);
263 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
264 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
265 void (*cache_update)(struct hh_cache *hh,
266 const struct net_device *dev,
267 const unsigned char *haddr);
268 bool (*validate)(const char *ll_header, unsigned int len);
271 /* These flag bits are private to the generic network queueing
272 * layer, they may not be explicitly referenced by any other
276 enum netdev_state_t {
278 __LINK_STATE_PRESENT,
279 __LINK_STATE_NOCARRIER,
280 __LINK_STATE_LINKWATCH_PENDING,
281 __LINK_STATE_DORMANT,
286 * This structure holds at boot time configured netdevice settings. They
287 * are then used in the device probing.
289 struct netdev_boot_setup {
293 #define NETDEV_BOOT_SETUP_MAX 8
295 int __init netdev_boot_setup(char *str);
298 * Structure for NAPI scheduling similar to tasklet but with weighting
301 /* The poll_list must only be managed by the entity which
302 * changes the state of the NAPI_STATE_SCHED bit. This means
303 * whoever atomically sets that bit can add this napi_struct
304 * to the per-cpu poll_list, and whoever clears that bit
305 * can remove from the list right before clearing the bit.
307 struct list_head poll_list;
311 unsigned int gro_count;
312 int (*poll)(struct napi_struct *, int);
313 #ifdef CONFIG_NETPOLL
314 spinlock_t poll_lock;
317 struct net_device *dev;
318 struct sk_buff *gro_list;
320 struct hrtimer timer;
321 struct list_head dev_list;
322 struct hlist_node napi_hash_node;
323 unsigned int napi_id;
327 NAPI_STATE_SCHED, /* Poll is scheduled */
328 NAPI_STATE_DISABLE, /* Disable pending */
329 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
330 NAPI_STATE_HASHED, /* In NAPI hash */
340 typedef enum gro_result gro_result_t;
343 * enum rx_handler_result - Possible return values for rx_handlers.
344 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
346 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
347 * case skb->dev was changed by rx_handler.
348 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
349 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
351 * rx_handlers are functions called from inside __netif_receive_skb(), to do
352 * special processing of the skb, prior to delivery to protocol handlers.
354 * Currently, a net_device can only have a single rx_handler registered. Trying
355 * to register a second rx_handler will return -EBUSY.
357 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
358 * To unregister a rx_handler on a net_device, use
359 * netdev_rx_handler_unregister().
361 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
364 * If the rx_handler consumed to skb in some way, it should return
365 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
366 * the skb to be delivered in some other ways.
368 * If the rx_handler changed skb->dev, to divert the skb to another
369 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
370 * new device will be called if it exists.
372 * If the rx_handler consider the skb should be ignored, it should return
373 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
374 * are registered on exact device (ptype->dev == skb->dev).
376 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
377 * delivered, it should return RX_HANDLER_PASS.
379 * A device without a registered rx_handler will behave as if rx_handler
380 * returned RX_HANDLER_PASS.
383 enum rx_handler_result {
389 typedef enum rx_handler_result rx_handler_result_t;
390 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
392 void __napi_schedule(struct napi_struct *n);
393 void __napi_schedule_irqoff(struct napi_struct *n);
395 static inline bool napi_disable_pending(struct napi_struct *n)
397 return test_bit(NAPI_STATE_DISABLE, &n->state);
401 * napi_schedule_prep - check if napi can be scheduled
404 * Test if NAPI routine is already running, and if not mark
405 * it as running. This is used as a condition variable
406 * insure only one NAPI poll instance runs. We also make
407 * sure there is no pending NAPI disable.
409 static inline bool napi_schedule_prep(struct napi_struct *n)
411 return !napi_disable_pending(n) &&
412 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
416 * napi_schedule - schedule NAPI poll
419 * Schedule NAPI poll routine to be called if it is not already
422 static inline void napi_schedule(struct napi_struct *n)
424 if (napi_schedule_prep(n))
429 * napi_schedule_irqoff - schedule NAPI poll
432 * Variant of napi_schedule(), assuming hard irqs are masked.
434 static inline void napi_schedule_irqoff(struct napi_struct *n)
436 if (napi_schedule_prep(n))
437 __napi_schedule_irqoff(n);
440 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
441 static inline bool napi_reschedule(struct napi_struct *napi)
443 if (napi_schedule_prep(napi)) {
444 __napi_schedule(napi);
450 void __napi_complete(struct napi_struct *n);
451 void napi_complete_done(struct napi_struct *n, int work_done);
453 * napi_complete - NAPI processing complete
456 * Mark NAPI processing as complete.
457 * Consider using napi_complete_done() instead.
459 static inline void napi_complete(struct napi_struct *n)
461 return napi_complete_done(n, 0);
465 * napi_by_id - lookup a NAPI by napi_id
466 * @napi_id: hashed napi_id
468 * lookup @napi_id in napi_hash table
469 * must be called under rcu_read_lock()
471 struct napi_struct *napi_by_id(unsigned int napi_id);
474 * napi_hash_add - add a NAPI to global hashtable
475 * @napi: napi context
477 * generate a new napi_id and store a @napi under it in napi_hash
479 void napi_hash_add(struct napi_struct *napi);
482 * napi_hash_del - remove a NAPI from global table
483 * @napi: napi context
485 * Warning: caller must observe rcu grace period
486 * before freeing memory containing @napi
488 void napi_hash_del(struct napi_struct *napi);
491 * napi_disable - prevent NAPI from scheduling
494 * Stop NAPI from being scheduled on this context.
495 * Waits till any outstanding processing completes.
497 void napi_disable(struct napi_struct *n);
500 * napi_enable - enable NAPI scheduling
503 * Resume NAPI from being scheduled on this context.
504 * Must be paired with napi_disable.
506 static inline void napi_enable(struct napi_struct *n)
508 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
509 smp_mb__before_atomic();
510 clear_bit(NAPI_STATE_SCHED, &n->state);
511 clear_bit(NAPI_STATE_NPSVC, &n->state);
516 * napi_synchronize - wait until NAPI is not running
519 * Wait until NAPI is done being scheduled on this context.
520 * Waits till any outstanding processing completes but
521 * does not disable future activations.
523 static inline void napi_synchronize(const struct napi_struct *n)
525 while (test_bit(NAPI_STATE_SCHED, &n->state))
529 # define napi_synchronize(n) barrier()
532 enum netdev_queue_state_t {
533 __QUEUE_STATE_DRV_XOFF,
534 __QUEUE_STATE_STACK_XOFF,
535 __QUEUE_STATE_FROZEN,
538 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
539 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
540 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
542 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
543 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
545 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
549 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
550 * netif_tx_* functions below are used to manipulate this flag. The
551 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
552 * queue independently. The netif_xmit_*stopped functions below are called
553 * to check if the queue has been stopped by the driver or stack (either
554 * of the XOFF bits are set in the state). Drivers should not need to call
555 * netif_xmit*stopped functions, they should only be using netif_tx_*.
558 struct netdev_queue {
562 struct net_device *dev;
563 struct Qdisc __rcu *qdisc;
564 struct Qdisc *qdisc_sleeping;
568 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
574 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
577 * please use this field instead of dev->trans_start
579 unsigned long trans_start;
582 * Number of TX timeouts for this queue
583 * (/sys/class/net/DEV/Q/trans_timeout)
585 unsigned long trans_timeout;
592 unsigned long tx_maxrate;
593 } ____cacheline_aligned_in_smp;
595 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
597 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
604 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
606 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
613 * This structure holds an RPS map which can be of variable length. The
614 * map is an array of CPUs.
621 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
624 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
625 * tail pointer for that CPU's input queue at the time of last enqueue, and
626 * a hardware filter index.
628 struct rps_dev_flow {
631 unsigned int last_qtail;
633 #define RPS_NO_FILTER 0xffff
636 * The rps_dev_flow_table structure contains a table of flow mappings.
638 struct rps_dev_flow_table {
641 struct rps_dev_flow flows[0];
643 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
644 ((_num) * sizeof(struct rps_dev_flow)))
647 * The rps_sock_flow_table contains mappings of flows to the last CPU
648 * on which they were processed by the application (set in recvmsg).
649 * Each entry is a 32bit value. Upper part is the high order bits
650 * of flow hash, lower part is cpu number.
651 * rps_cpu_mask is used to partition the space, depending on number of
652 * possible cpus : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
653 * For example, if 64 cpus are possible, rps_cpu_mask = 0x3f,
654 * meaning we use 32-6=26 bits for the hash.
656 struct rps_sock_flow_table {
659 u32 ents[0] ____cacheline_aligned_in_smp;
661 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
663 #define RPS_NO_CPU 0xffff
665 extern u32 rps_cpu_mask;
666 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
668 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
672 unsigned int index = hash & table->mask;
673 u32 val = hash & ~rps_cpu_mask;
675 /* We only give a hint, preemption can change cpu under us */
676 val |= raw_smp_processor_id();
678 if (table->ents[index] != val)
679 table->ents[index] = val;
683 #ifdef CONFIG_RFS_ACCEL
684 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
687 #endif /* CONFIG_RPS */
689 /* This structure contains an instance of an RX queue. */
690 struct netdev_rx_queue {
692 struct rps_map __rcu *rps_map;
693 struct rps_dev_flow_table __rcu *rps_flow_table;
696 struct net_device *dev;
697 } ____cacheline_aligned_in_smp;
700 * RX queue sysfs structures and functions.
702 struct rx_queue_attribute {
703 struct attribute attr;
704 ssize_t (*show)(struct netdev_rx_queue *queue,
705 struct rx_queue_attribute *attr, char *buf);
706 ssize_t (*store)(struct netdev_rx_queue *queue,
707 struct rx_queue_attribute *attr, const char *buf, size_t len);
712 * This structure holds an XPS map which can be of variable length. The
713 * map is an array of queues.
717 unsigned int alloc_len;
721 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
722 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
723 - sizeof(struct xps_map)) / sizeof(u16))
726 * This structure holds all XPS maps for device. Maps are indexed by CPU.
728 struct xps_dev_maps {
730 struct xps_map __rcu *cpu_map[0];
732 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
733 (nr_cpu_ids * sizeof(struct xps_map *)))
734 #endif /* CONFIG_XPS */
736 #define TC_MAX_QUEUE 16
737 #define TC_BITMASK 15
738 /* HW offloaded queuing disciplines txq count and offset maps */
739 struct netdev_tc_txq {
744 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
746 * This structure is to hold information about the device
747 * configured to run FCoE protocol stack.
749 struct netdev_fcoe_hbainfo {
750 char manufacturer[64];
751 char serial_number[64];
752 char hardware_version[64];
753 char driver_version[64];
754 char optionrom_version[64];
755 char firmware_version[64];
757 char model_description[256];
761 #define MAX_PHYS_ITEM_ID_LEN 32
763 /* This structure holds a unique identifier to identify some
764 * physical item (port for example) used by a netdevice.
766 struct netdev_phys_item_id {
767 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
768 unsigned char id_len;
771 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
772 struct netdev_phys_item_id *b)
774 return a->id_len == b->id_len &&
775 memcmp(a->id, b->id, a->id_len) == 0;
778 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
779 struct sk_buff *skb);
782 * This structure defines the management hooks for network devices.
783 * The following hooks can be defined; unless noted otherwise, they are
784 * optional and can be filled with a null pointer.
786 * int (*ndo_init)(struct net_device *dev);
787 * This function is called once when network device is registered.
788 * The network device can use this to any late stage initializaton
789 * or semantic validattion. It can fail with an error code which will
790 * be propogated back to register_netdev
792 * void (*ndo_uninit)(struct net_device *dev);
793 * This function is called when device is unregistered or when registration
794 * fails. It is not called if init fails.
796 * int (*ndo_open)(struct net_device *dev);
797 * This function is called when network device transistions to the up
800 * int (*ndo_stop)(struct net_device *dev);
801 * This function is called when network device transistions to the down
804 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
805 * struct net_device *dev);
806 * Called when a packet needs to be transmitted.
807 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
808 * the queue before that can happen; it's for obsolete devices and weird
809 * corner cases, but the stack really does a non-trivial amount
810 * of useless work if you return NETDEV_TX_BUSY.
811 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
812 * Required can not be NULL.
814 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
815 * void *accel_priv, select_queue_fallback_t fallback);
816 * Called to decide which queue to when device supports multiple
819 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
820 * This function is called to allow device receiver to make
821 * changes to configuration when multicast or promiscious is enabled.
823 * void (*ndo_set_rx_mode)(struct net_device *dev);
824 * This function is called device changes address list filtering.
825 * If driver handles unicast address filtering, it should set
826 * IFF_UNICAST_FLT to its priv_flags.
828 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
829 * This function is called when the Media Access Control address
830 * needs to be changed. If this interface is not defined, the
831 * mac address can not be changed.
833 * int (*ndo_validate_addr)(struct net_device *dev);
834 * Test if Media Access Control address is valid for the device.
836 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
837 * Called when a user request an ioctl which can't be handled by
838 * the generic interface code. If not defined ioctl's return
839 * not supported error code.
841 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
842 * Used to set network devices bus interface parameters. This interface
843 * is retained for legacy reason, new devices should use the bus
844 * interface (PCI) for low level management.
846 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
847 * Called when a user wants to change the Maximum Transfer Unit
848 * of a device. If not defined, any request to change MTU will
849 * will return an error.
851 * void (*ndo_tx_timeout)(struct net_device *dev);
852 * Callback uses when the transmitter has not made any progress
853 * for dev->watchdog ticks.
855 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
856 * struct rtnl_link_stats64 *storage);
857 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
858 * Called when a user wants to get the network device usage
859 * statistics. Drivers must do one of the following:
860 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
861 * rtnl_link_stats64 structure passed by the caller.
862 * 2. Define @ndo_get_stats to update a net_device_stats structure
863 * (which should normally be dev->stats) and return a pointer to
864 * it. The structure may be changed asynchronously only if each
865 * field is written atomically.
866 * 3. Update dev->stats asynchronously and atomically, and define
869 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
870 * If device support VLAN filtering this function is called when a
871 * VLAN id is registered.
873 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
874 * If device support VLAN filtering this function is called when a
875 * VLAN id is unregistered.
877 * void (*ndo_poll_controller)(struct net_device *dev);
879 * SR-IOV management functions.
880 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
881 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
882 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
884 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
885 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
886 * int (*ndo_get_vf_config)(struct net_device *dev,
887 * int vf, struct ifla_vf_info *ivf);
888 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
889 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
890 * struct nlattr *port[]);
892 * Enable or disable the VF ability to query its RSS Redirection Table and
893 * Hash Key. This is needed since on some devices VF share this information
894 * with PF and querying it may adduce a theoretical security risk.
895 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
896 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
897 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
898 * Called to setup 'tc' number of traffic classes in the net device. This
899 * is always called from the stack with the rtnl lock held and netif tx
900 * queues stopped. This allows the netdevice to perform queue management
903 * Fiber Channel over Ethernet (FCoE) offload functions.
904 * int (*ndo_fcoe_enable)(struct net_device *dev);
905 * Called when the FCoE protocol stack wants to start using LLD for FCoE
906 * so the underlying device can perform whatever needed configuration or
907 * initialization to support acceleration of FCoE traffic.
909 * int (*ndo_fcoe_disable)(struct net_device *dev);
910 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
911 * so the underlying device can perform whatever needed clean-ups to
912 * stop supporting acceleration of FCoE traffic.
914 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
915 * struct scatterlist *sgl, unsigned int sgc);
916 * Called when the FCoE Initiator wants to initialize an I/O that
917 * is a possible candidate for Direct Data Placement (DDP). The LLD can
918 * perform necessary setup and returns 1 to indicate the device is set up
919 * successfully to perform DDP on this I/O, otherwise this returns 0.
921 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
922 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
923 * indicated by the FC exchange id 'xid', so the underlying device can
924 * clean up and reuse resources for later DDP requests.
926 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
927 * struct scatterlist *sgl, unsigned int sgc);
928 * Called when the FCoE Target wants to initialize an I/O that
929 * is a possible candidate for Direct Data Placement (DDP). The LLD can
930 * perform necessary setup and returns 1 to indicate the device is set up
931 * successfully to perform DDP on this I/O, otherwise this returns 0.
933 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
934 * struct netdev_fcoe_hbainfo *hbainfo);
935 * Called when the FCoE Protocol stack wants information on the underlying
936 * device. This information is utilized by the FCoE protocol stack to
937 * register attributes with Fiber Channel management service as per the
938 * FC-GS Fabric Device Management Information(FDMI) specification.
940 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
941 * Called when the underlying device wants to override default World Wide
942 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
943 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
944 * protocol stack to use.
947 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
948 * u16 rxq_index, u32 flow_id);
949 * Set hardware filter for RFS. rxq_index is the target queue index;
950 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
951 * Return the filter ID on success, or a negative error code.
953 * Slave management functions (for bridge, bonding, etc).
954 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
955 * Called to make another netdev an underling.
957 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
958 * Called to release previously enslaved netdev.
960 * Feature/offload setting functions.
961 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
962 * netdev_features_t features);
963 * Adjusts the requested feature flags according to device-specific
964 * constraints, and returns the resulting flags. Must not modify
967 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
968 * Called to update device configuration to new features. Passed
969 * feature set might be less than what was returned by ndo_fix_features()).
970 * Must return >0 or -errno if it changed dev->features itself.
972 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
973 * struct net_device *dev,
974 * const unsigned char *addr, u16 vid, u16 flags)
975 * Adds an FDB entry to dev for addr.
976 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
977 * struct net_device *dev,
978 * const unsigned char *addr, u16 vid)
979 * Deletes the FDB entry from dev coresponding to addr.
980 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
981 * struct net_device *dev, struct net_device *filter_dev,
983 * Used to add FDB entries to dump requests. Implementers should add
984 * entries to skb and update idx with the number of entries.
986 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
988 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
989 * struct net_device *dev, u32 filter_mask,
991 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
994 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
995 * Called to change device carrier. Soft-devices (like dummy, team, etc)
996 * which do not represent real hardware may define this to allow their
997 * userspace components to manage their virtual carrier state. Devices
998 * that determine carrier state from physical hardware properties (eg
999 * network cables) or protocol-dependent mechanisms (eg
1000 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1002 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1003 * struct netdev_phys_item_id *ppid);
1004 * Called to get ID of physical port of this device. If driver does
1005 * not implement this, it is assumed that the hw is not able to have
1006 * multiple net devices on single physical port.
1008 * void (*ndo_add_vxlan_port)(struct net_device *dev,
1009 * sa_family_t sa_family, __be16 port);
1010 * Called by vxlan to notiy a driver about the UDP port and socket
1011 * address family that vxlan is listnening to. It is called only when
1012 * a new port starts listening. The operation is protected by the
1013 * vxlan_net->sock_lock.
1015 * void (*ndo_del_vxlan_port)(struct net_device *dev,
1016 * sa_family_t sa_family, __be16 port);
1017 * Called by vxlan to notify the driver about a UDP port and socket
1018 * address family that vxlan is not listening to anymore. The operation
1019 * is protected by the vxlan_net->sock_lock.
1021 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1022 * struct net_device *dev)
1023 * Called by upper layer devices to accelerate switching or other
1024 * station functionality into hardware. 'pdev is the lowerdev
1025 * to use for the offload and 'dev' is the net device that will
1026 * back the offload. Returns a pointer to the private structure
1027 * the upper layer will maintain.
1028 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1029 * Called by upper layer device to delete the station created
1030 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1031 * the station and priv is the structure returned by the add
1033 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
1034 * struct net_device *dev,
1036 * Callback to use for xmit over the accelerated station. This
1037 * is used in place of ndo_start_xmit on accelerated net
1039 * netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
1040 * struct net_device *dev
1041 * netdev_features_t features);
1042 * Called by core transmit path to determine if device is capable of
1043 * performing offload operations on a given packet. This is to give
1044 * the device an opportunity to implement any restrictions that cannot
1045 * be otherwise expressed by feature flags. The check is called with
1046 * the set of features that the stack has calculated and it returns
1047 * those the driver believes to be appropriate.
1048 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1049 * int queue_index, u32 maxrate);
1050 * Called when a user wants to set a max-rate limitation of specific
1052 * int (*ndo_get_iflink)(const struct net_device *dev);
1053 * Called to get the iflink value of this device.
1054 * void (*ndo_change_proto_down)(struct net_device *dev,
1056 * This function is used to pass protocol port error state information
1057 * to the switch driver. The switch driver can react to the proto_down
1058 * by doing a phys down on the associated switch port.
1059 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1060 * This function is used to get egress tunnel information for given skb.
1061 * This is useful for retrieving outer tunnel header parameters while
1065 struct net_device_ops {
1066 int (*ndo_init)(struct net_device *dev);
1067 void (*ndo_uninit)(struct net_device *dev);
1068 int (*ndo_open)(struct net_device *dev);
1069 int (*ndo_stop)(struct net_device *dev);
1070 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
1071 struct net_device *dev);
1072 u16 (*ndo_select_queue)(struct net_device *dev,
1073 struct sk_buff *skb,
1075 select_queue_fallback_t fallback);
1076 void (*ndo_change_rx_flags)(struct net_device *dev,
1078 void (*ndo_set_rx_mode)(struct net_device *dev);
1079 int (*ndo_set_mac_address)(struct net_device *dev,
1081 int (*ndo_validate_addr)(struct net_device *dev);
1082 int (*ndo_do_ioctl)(struct net_device *dev,
1083 struct ifreq *ifr, int cmd);
1084 int (*ndo_set_config)(struct net_device *dev,
1086 int (*ndo_change_mtu)(struct net_device *dev,
1088 int (*ndo_neigh_setup)(struct net_device *dev,
1089 struct neigh_parms *);
1090 void (*ndo_tx_timeout) (struct net_device *dev);
1092 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
1093 struct rtnl_link_stats64 *storage);
1094 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1096 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1097 __be16 proto, u16 vid);
1098 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1099 __be16 proto, u16 vid);
1100 #ifdef CONFIG_NET_POLL_CONTROLLER
1101 void (*ndo_poll_controller)(struct net_device *dev);
1102 int (*ndo_netpoll_setup)(struct net_device *dev,
1103 struct netpoll_info *info);
1104 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1106 #ifdef CONFIG_NET_RX_BUSY_POLL
1107 int (*ndo_busy_poll)(struct napi_struct *dev);
1109 int (*ndo_set_vf_mac)(struct net_device *dev,
1110 int queue, u8 *mac);
1111 int (*ndo_set_vf_vlan)(struct net_device *dev,
1112 int queue, u16 vlan, u8 qos);
1113 int (*ndo_set_vf_rate)(struct net_device *dev,
1114 int vf, int min_tx_rate,
1116 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1117 int vf, bool setting);
1118 int (*ndo_set_vf_trust)(struct net_device *dev,
1119 int vf, bool setting);
1120 int (*ndo_get_vf_config)(struct net_device *dev,
1122 struct ifla_vf_info *ivf);
1123 int (*ndo_set_vf_link_state)(struct net_device *dev,
1124 int vf, int link_state);
1125 int (*ndo_get_vf_stats)(struct net_device *dev,
1127 struct ifla_vf_stats
1129 int (*ndo_set_vf_port)(struct net_device *dev,
1131 struct nlattr *port[]);
1132 int (*ndo_get_vf_port)(struct net_device *dev,
1133 int vf, struct sk_buff *skb);
1134 int (*ndo_set_vf_rss_query_en)(
1135 struct net_device *dev,
1136 int vf, bool setting);
1137 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
1138 #if IS_ENABLED(CONFIG_FCOE)
1139 int (*ndo_fcoe_enable)(struct net_device *dev);
1140 int (*ndo_fcoe_disable)(struct net_device *dev);
1141 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1143 struct scatterlist *sgl,
1145 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1147 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1149 struct scatterlist *sgl,
1151 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1152 struct netdev_fcoe_hbainfo *hbainfo);
1155 #if IS_ENABLED(CONFIG_LIBFCOE)
1156 #define NETDEV_FCOE_WWNN 0
1157 #define NETDEV_FCOE_WWPN 1
1158 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1159 u64 *wwn, int type);
1162 #ifdef CONFIG_RFS_ACCEL
1163 int (*ndo_rx_flow_steer)(struct net_device *dev,
1164 const struct sk_buff *skb,
1168 int (*ndo_add_slave)(struct net_device *dev,
1169 struct net_device *slave_dev);
1170 int (*ndo_del_slave)(struct net_device *dev,
1171 struct net_device *slave_dev);
1172 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1173 netdev_features_t features);
1174 int (*ndo_set_features)(struct net_device *dev,
1175 netdev_features_t features);
1176 int (*ndo_neigh_construct)(struct neighbour *n);
1177 void (*ndo_neigh_destroy)(struct neighbour *n);
1179 int (*ndo_fdb_add)(struct ndmsg *ndm,
1180 struct nlattr *tb[],
1181 struct net_device *dev,
1182 const unsigned char *addr,
1185 int (*ndo_fdb_del)(struct ndmsg *ndm,
1186 struct nlattr *tb[],
1187 struct net_device *dev,
1188 const unsigned char *addr,
1190 int (*ndo_fdb_dump)(struct sk_buff *skb,
1191 struct netlink_callback *cb,
1192 struct net_device *dev,
1193 struct net_device *filter_dev,
1196 int (*ndo_bridge_setlink)(struct net_device *dev,
1197 struct nlmsghdr *nlh,
1199 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1201 struct net_device *dev,
1204 int (*ndo_bridge_dellink)(struct net_device *dev,
1205 struct nlmsghdr *nlh,
1207 int (*ndo_change_carrier)(struct net_device *dev,
1209 int (*ndo_get_phys_port_id)(struct net_device *dev,
1210 struct netdev_phys_item_id *ppid);
1211 int (*ndo_get_phys_port_name)(struct net_device *dev,
1212 char *name, size_t len);
1213 void (*ndo_add_vxlan_port)(struct net_device *dev,
1214 sa_family_t sa_family,
1216 void (*ndo_del_vxlan_port)(struct net_device *dev,
1217 sa_family_t sa_family,
1220 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1221 struct net_device *dev);
1222 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1225 netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb,
1226 struct net_device *dev,
1228 int (*ndo_get_lock_subclass)(struct net_device *dev);
1229 netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
1230 struct net_device *dev,
1231 netdev_features_t features);
1232 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1235 int (*ndo_get_iflink)(const struct net_device *dev);
1236 int (*ndo_change_proto_down)(struct net_device *dev,
1238 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1239 struct sk_buff *skb);
1243 * enum net_device_priv_flags - &struct net_device priv_flags
1245 * These are the &struct net_device, they are only set internally
1246 * by drivers and used in the kernel. These flags are invisible to
1247 * userspace, this means that the order of these flags can change
1248 * during any kernel release.
1250 * You should have a pretty good reason to be extending these flags.
1252 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1253 * @IFF_EBRIDGE: Ethernet bridging device
1254 * @IFF_BONDING: bonding master or slave
1255 * @IFF_ISATAP: ISATAP interface (RFC4214)
1256 * @IFF_WAN_HDLC: WAN HDLC device
1257 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1259 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1260 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1261 * @IFF_MACVLAN_PORT: device used as macvlan port
1262 * @IFF_BRIDGE_PORT: device used as bridge port
1263 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1264 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1265 * @IFF_UNICAST_FLT: Supports unicast filtering
1266 * @IFF_TEAM_PORT: device used as team port
1267 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1268 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1269 * change when it's running
1270 * @IFF_MACVLAN: Macvlan device
1271 * @IFF_L3MDEV_MASTER: device is an L3 master device
1272 * @IFF_NO_QUEUE: device can run without qdisc attached
1273 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1274 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1276 enum netdev_priv_flags {
1277 IFF_802_1Q_VLAN = 1<<0,
1281 IFF_WAN_HDLC = 1<<4,
1282 IFF_XMIT_DST_RELEASE = 1<<5,
1283 IFF_DONT_BRIDGE = 1<<6,
1284 IFF_DISABLE_NETPOLL = 1<<7,
1285 IFF_MACVLAN_PORT = 1<<8,
1286 IFF_BRIDGE_PORT = 1<<9,
1287 IFF_OVS_DATAPATH = 1<<10,
1288 IFF_TX_SKB_SHARING = 1<<11,
1289 IFF_UNICAST_FLT = 1<<12,
1290 IFF_TEAM_PORT = 1<<13,
1291 IFF_SUPP_NOFCS = 1<<14,
1292 IFF_LIVE_ADDR_CHANGE = 1<<15,
1293 IFF_MACVLAN = 1<<16,
1294 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1295 IFF_IPVLAN_MASTER = 1<<18,
1296 IFF_IPVLAN_SLAVE = 1<<19,
1297 IFF_L3MDEV_MASTER = 1<<20,
1298 IFF_NO_QUEUE = 1<<21,
1299 IFF_OPENVSWITCH = 1<<22,
1300 IFF_L3MDEV_SLAVE = 1<<23,
1303 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1304 #define IFF_EBRIDGE IFF_EBRIDGE
1305 #define IFF_BONDING IFF_BONDING
1306 #define IFF_ISATAP IFF_ISATAP
1307 #define IFF_WAN_HDLC IFF_WAN_HDLC
1308 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1309 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1310 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1311 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1312 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1313 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1314 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1315 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1316 #define IFF_TEAM_PORT IFF_TEAM_PORT
1317 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1318 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1319 #define IFF_MACVLAN IFF_MACVLAN
1320 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1321 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1322 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1323 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1324 #define IFF_NO_QUEUE IFF_NO_QUEUE
1325 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1326 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1329 * struct net_device - The DEVICE structure.
1330 * Actually, this whole structure is a big mistake. It mixes I/O
1331 * data with strictly "high-level" data, and it has to know about
1332 * almost every data structure used in the INET module.
1334 * @name: This is the first field of the "visible" part of this structure
1335 * (i.e. as seen by users in the "Space.c" file). It is the name
1338 * @name_hlist: Device name hash chain, please keep it close to name[]
1339 * @ifalias: SNMP alias
1340 * @mem_end: Shared memory end
1341 * @mem_start: Shared memory start
1342 * @base_addr: Device I/O address
1343 * @irq: Device IRQ number
1345 * @carrier_changes: Stats to monitor carrier on<->off transitions
1347 * @state: Generic network queuing layer state, see netdev_state_t
1348 * @dev_list: The global list of network devices
1349 * @napi_list: List entry, that is used for polling napi devices
1350 * @unreg_list: List entry, that is used, when we are unregistering the
1351 * device, see the function unregister_netdev
1352 * @close_list: List entry, that is used, when we are closing the device
1354 * @adj_list: Directly linked devices, like slaves for bonding
1355 * @all_adj_list: All linked devices, *including* neighbours
1356 * @features: Currently active device features
1357 * @hw_features: User-changeable features
1359 * @wanted_features: User-requested features
1360 * @vlan_features: Mask of features inheritable by VLAN devices
1362 * @hw_enc_features: Mask of features inherited by encapsulating devices
1363 * This field indicates what encapsulation
1364 * offloads the hardware is capable of doing,
1365 * and drivers will need to set them appropriately.
1367 * @mpls_features: Mask of features inheritable by MPLS
1369 * @ifindex: interface index
1370 * @group: The group, that the device belongs to
1372 * @stats: Statistics struct, which was left as a legacy, use
1373 * rtnl_link_stats64 instead
1375 * @rx_dropped: Dropped packets by core network,
1376 * do not use this in drivers
1377 * @tx_dropped: Dropped packets by core network,
1378 * do not use this in drivers
1380 * @wireless_handlers: List of functions to handle Wireless Extensions,
1382 * see <net/iw_handler.h> for details.
1383 * @wireless_data: Instance data managed by the core of wireless extensions
1385 * @netdev_ops: Includes several pointers to callbacks,
1386 * if one wants to override the ndo_*() functions
1387 * @ethtool_ops: Management operations
1388 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1389 * of Layer 2 headers.
1391 * @flags: Interface flags (a la BSD)
1392 * @priv_flags: Like 'flags' but invisible to userspace,
1393 * see if.h for the definitions
1394 * @gflags: Global flags ( kept as legacy )
1395 * @padded: How much padding added by alloc_netdev()
1396 * @operstate: RFC2863 operstate
1397 * @link_mode: Mapping policy to operstate
1398 * @if_port: Selectable AUI, TP, ...
1400 * @mtu: Interface MTU value
1401 * @type: Interface hardware type
1402 * @hard_header_len: Maximum hardware header length.
1404 * @needed_headroom: Extra headroom the hardware may need, but not in all
1405 * cases can this be guaranteed
1406 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1407 * cases can this be guaranteed. Some cases also use
1408 * LL_MAX_HEADER instead to allocate the skb
1410 * interface address info:
1412 * @perm_addr: Permanent hw address
1413 * @addr_assign_type: Hw address assignment type
1414 * @addr_len: Hardware address length
1415 * @neigh_priv_len; Used in neigh_alloc(),
1416 * initialized only in atm/clip.c
1417 * @dev_id: Used to differentiate devices that share
1418 * the same link layer address
1419 * @dev_port: Used to differentiate devices that share
1421 * @addr_list_lock: XXX: need comments on this one
1422 * @uc_promisc: Counter, that indicates, that promiscuous mode
1423 * has been enabled due to the need to listen to
1424 * additional unicast addresses in a device that
1425 * does not implement ndo_set_rx_mode()
1426 * @uc: unicast mac addresses
1427 * @mc: multicast mac addresses
1428 * @dev_addrs: list of device hw addresses
1429 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1430 * @promiscuity: Number of times, the NIC is told to work in
1431 * Promiscuous mode, if it becomes 0 the NIC will
1432 * exit from working in Promiscuous mode
1433 * @allmulti: Counter, enables or disables allmulticast mode
1435 * @vlan_info: VLAN info
1436 * @dsa_ptr: dsa specific data
1437 * @tipc_ptr: TIPC specific data
1438 * @atalk_ptr: AppleTalk link
1439 * @ip_ptr: IPv4 specific data
1440 * @dn_ptr: DECnet specific data
1441 * @ip6_ptr: IPv6 specific data
1442 * @ax25_ptr: AX.25 specific data
1443 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1445 * @last_rx: Time of last Rx
1446 * @dev_addr: Hw address (before bcast,
1447 * because most packets are unicast)
1449 * @_rx: Array of RX queues
1450 * @num_rx_queues: Number of RX queues
1451 * allocated at register_netdev() time
1452 * @real_num_rx_queues: Number of RX queues currently active in device
1454 * @rx_handler: handler for received packets
1455 * @rx_handler_data: XXX: need comments on this one
1456 * @ingress_queue: XXX: need comments on this one
1457 * @broadcast: hw bcast address
1459 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1460 * indexed by RX queue number. Assigned by driver.
1461 * This must only be set if the ndo_rx_flow_steer
1462 * operation is defined
1463 * @index_hlist: Device index hash chain
1465 * @_tx: Array of TX queues
1466 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1467 * @real_num_tx_queues: Number of TX queues currently active in device
1468 * @qdisc: Root qdisc from userspace point of view
1469 * @tx_queue_len: Max frames per queue allowed
1470 * @tx_global_lock: XXX: need comments on this one
1472 * @xps_maps: XXX: need comments on this one
1474 * @offload_fwd_mark: Offload device fwding mark
1476 * @trans_start: Time (in jiffies) of last Tx
1477 * @watchdog_timeo: Represents the timeout that is used by
1478 * the watchdog ( see dev_watchdog() )
1479 * @watchdog_timer: List of timers
1481 * @pcpu_refcnt: Number of references to this device
1482 * @todo_list: Delayed register/unregister
1483 * @link_watch_list: XXX: need comments on this one
1485 * @reg_state: Register/unregister state machine
1486 * @dismantle: Device is going to be freed
1487 * @rtnl_link_state: This enum represents the phases of creating
1490 * @destructor: Called from unregister,
1491 * can be used to call free_netdev
1492 * @npinfo: XXX: need comments on this one
1493 * @nd_net: Network namespace this network device is inside
1495 * @ml_priv: Mid-layer private
1496 * @lstats: Loopback statistics
1497 * @tstats: Tunnel statistics
1498 * @dstats: Dummy statistics
1499 * @vstats: Virtual ethernet statistics
1504 * @dev: Class/net/name entry
1505 * @sysfs_groups: Space for optional device, statistics and wireless
1508 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1509 * @rtnl_link_ops: Rtnl_link_ops
1511 * @gso_max_size: Maximum size of generic segmentation offload
1512 * @gso_max_segs: Maximum number of segments that can be passed to the
1514 * @gso_min_segs: Minimum number of segments that can be passed to the
1517 * @dcbnl_ops: Data Center Bridging netlink ops
1518 * @num_tc: Number of traffic classes in the net device
1519 * @tc_to_txq: XXX: need comments on this one
1520 * @prio_tc_map XXX: need comments on this one
1522 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1524 * @priomap: XXX: need comments on this one
1525 * @phydev: Physical device may attach itself
1526 * for hardware timestamping
1528 * @qdisc_tx_busylock: XXX: need comments on this one
1530 * @proto_down: protocol port state information can be sent to the
1531 * switch driver and used to set the phys state of the
1534 * FIXME: cleanup struct net_device such that network protocol info
1539 char name[IFNAMSIZ];
1540 struct hlist_node name_hlist;
1543 * I/O specific fields
1544 * FIXME: Merge these and struct ifmap into one
1546 unsigned long mem_end;
1547 unsigned long mem_start;
1548 unsigned long base_addr;
1551 atomic_t carrier_changes;
1554 * Some hardware also needs these fields (state,dev_list,
1555 * napi_list,unreg_list,close_list) but they are not
1556 * part of the usual set specified in Space.c.
1559 unsigned long state;
1561 struct list_head dev_list;
1562 struct list_head napi_list;
1563 struct list_head unreg_list;
1564 struct list_head close_list;
1565 struct list_head ptype_all;
1566 struct list_head ptype_specific;
1569 struct list_head upper;
1570 struct list_head lower;
1574 struct list_head upper;
1575 struct list_head lower;
1578 netdev_features_t features;
1579 netdev_features_t hw_features;
1580 netdev_features_t wanted_features;
1581 netdev_features_t vlan_features;
1582 netdev_features_t hw_enc_features;
1583 netdev_features_t mpls_features;
1588 struct net_device_stats stats;
1590 atomic_long_t rx_dropped;
1591 atomic_long_t tx_dropped;
1593 #ifdef CONFIG_WIRELESS_EXT
1594 const struct iw_handler_def * wireless_handlers;
1595 struct iw_public_data * wireless_data;
1597 const struct net_device_ops *netdev_ops;
1598 const struct ethtool_ops *ethtool_ops;
1599 #ifdef CONFIG_NET_SWITCHDEV
1600 const struct switchdev_ops *switchdev_ops;
1602 #ifdef CONFIG_NET_L3_MASTER_DEV
1603 const struct l3mdev_ops *l3mdev_ops;
1606 const struct header_ops *header_ops;
1609 unsigned int priv_flags;
1611 unsigned short gflags;
1612 unsigned short padded;
1614 unsigned char operstate;
1615 unsigned char link_mode;
1617 unsigned char if_port;
1621 unsigned short type;
1622 unsigned short hard_header_len;
1624 unsigned short needed_headroom;
1625 unsigned short needed_tailroom;
1627 /* Interface address info. */
1628 unsigned char perm_addr[MAX_ADDR_LEN];
1629 unsigned char addr_assign_type;
1630 unsigned char addr_len;
1631 unsigned short neigh_priv_len;
1632 unsigned short dev_id;
1633 unsigned short dev_port;
1634 spinlock_t addr_list_lock;
1635 unsigned char name_assign_type;
1637 struct netdev_hw_addr_list uc;
1638 struct netdev_hw_addr_list mc;
1639 struct netdev_hw_addr_list dev_addrs;
1642 struct kset *queues_kset;
1644 unsigned int promiscuity;
1645 unsigned int allmulti;
1648 /* Protocol specific pointers */
1650 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1651 struct vlan_info __rcu *vlan_info;
1653 #if IS_ENABLED(CONFIG_NET_DSA)
1654 struct dsa_switch_tree *dsa_ptr;
1656 #if IS_ENABLED(CONFIG_TIPC)
1657 struct tipc_bearer __rcu *tipc_ptr;
1660 struct in_device __rcu *ip_ptr;
1661 struct dn_dev __rcu *dn_ptr;
1662 struct inet6_dev __rcu *ip6_ptr;
1664 struct wireless_dev *ieee80211_ptr;
1665 struct wpan_dev *ieee802154_ptr;
1666 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1667 struct mpls_dev __rcu *mpls_ptr;
1671 * Cache lines mostly used on receive path (including eth_type_trans())
1673 unsigned long last_rx;
1675 /* Interface address info used in eth_type_trans() */
1676 unsigned char *dev_addr;
1680 struct netdev_rx_queue *_rx;
1682 unsigned int num_rx_queues;
1683 unsigned int real_num_rx_queues;
1687 unsigned long gro_flush_timeout;
1688 rx_handler_func_t __rcu *rx_handler;
1689 void __rcu *rx_handler_data;
1691 #ifdef CONFIG_NET_CLS_ACT
1692 struct tcf_proto __rcu *ingress_cl_list;
1694 struct netdev_queue __rcu *ingress_queue;
1695 #ifdef CONFIG_NETFILTER_INGRESS
1696 struct list_head nf_hooks_ingress;
1699 unsigned char broadcast[MAX_ADDR_LEN];
1700 #ifdef CONFIG_RFS_ACCEL
1701 struct cpu_rmap *rx_cpu_rmap;
1703 struct hlist_node index_hlist;
1706 * Cache lines mostly used on transmit path
1708 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1709 unsigned int num_tx_queues;
1710 unsigned int real_num_tx_queues;
1711 struct Qdisc *qdisc;
1712 unsigned long tx_queue_len;
1713 spinlock_t tx_global_lock;
1717 struct xps_dev_maps __rcu *xps_maps;
1720 #ifdef CONFIG_NET_SWITCHDEV
1721 u32 offload_fwd_mark;
1724 /* These may be needed for future network-power-down code. */
1727 * trans_start here is expensive for high speed devices on SMP,
1728 * please use netdev_queue->trans_start instead.
1730 unsigned long trans_start;
1732 struct timer_list watchdog_timer;
1734 int __percpu *pcpu_refcnt;
1735 struct list_head todo_list;
1737 struct list_head link_watch_list;
1739 enum { NETREG_UNINITIALIZED=0,
1740 NETREG_REGISTERED, /* completed register_netdevice */
1741 NETREG_UNREGISTERING, /* called unregister_netdevice */
1742 NETREG_UNREGISTERED, /* completed unregister todo */
1743 NETREG_RELEASED, /* called free_netdev */
1744 NETREG_DUMMY, /* dummy device for NAPI poll */
1750 RTNL_LINK_INITIALIZED,
1751 RTNL_LINK_INITIALIZING,
1752 } rtnl_link_state:16;
1754 void (*destructor)(struct net_device *dev);
1756 #ifdef CONFIG_NETPOLL
1757 struct netpoll_info __rcu *npinfo;
1760 possible_net_t nd_net;
1762 /* mid-layer private */
1765 struct pcpu_lstats __percpu *lstats;
1766 struct pcpu_sw_netstats __percpu *tstats;
1767 struct pcpu_dstats __percpu *dstats;
1768 struct pcpu_vstats __percpu *vstats;
1771 struct garp_port __rcu *garp_port;
1772 struct mrp_port __rcu *mrp_port;
1775 const struct attribute_group *sysfs_groups[4];
1776 const struct attribute_group *sysfs_rx_queue_group;
1778 const struct rtnl_link_ops *rtnl_link_ops;
1780 /* for setting kernel sock attribute on TCP connection setup */
1781 #define GSO_MAX_SIZE 65536
1782 unsigned int gso_max_size;
1783 #define GSO_MAX_SEGS 65535
1787 const struct dcbnl_rtnl_ops *dcbnl_ops;
1790 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1791 u8 prio_tc_map[TC_BITMASK + 1];
1793 #if IS_ENABLED(CONFIG_FCOE)
1794 unsigned int fcoe_ddp_xid;
1796 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1797 struct netprio_map __rcu *priomap;
1799 struct phy_device *phydev;
1800 struct lock_class_key *qdisc_tx_busylock;
1803 #define to_net_dev(d) container_of(d, struct net_device, dev)
1805 #define NETDEV_ALIGN 32
1808 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1810 return dev->prio_tc_map[prio & TC_BITMASK];
1814 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1816 if (tc >= dev->num_tc)
1819 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1824 void netdev_reset_tc(struct net_device *dev)
1827 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1828 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1832 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1834 if (tc >= dev->num_tc)
1837 dev->tc_to_txq[tc].count = count;
1838 dev->tc_to_txq[tc].offset = offset;
1843 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1845 if (num_tc > TC_MAX_QUEUE)
1848 dev->num_tc = num_tc;
1853 int netdev_get_num_tc(struct net_device *dev)
1859 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1862 return &dev->_tx[index];
1865 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
1866 const struct sk_buff *skb)
1868 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
1871 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1872 void (*f)(struct net_device *,
1873 struct netdev_queue *,
1879 for (i = 0; i < dev->num_tx_queues; i++)
1880 f(dev, &dev->_tx[i], arg);
1883 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1884 struct sk_buff *skb,
1888 * Net namespace inlines
1891 struct net *dev_net(const struct net_device *dev)
1893 return read_pnet(&dev->nd_net);
1897 void dev_net_set(struct net_device *dev, struct net *net)
1899 write_pnet(&dev->nd_net, net);
1902 static inline bool netdev_uses_dsa(struct net_device *dev)
1904 #if IS_ENABLED(CONFIG_NET_DSA)
1905 if (dev->dsa_ptr != NULL)
1906 return dsa_uses_tagged_protocol(dev->dsa_ptr);
1912 * netdev_priv - access network device private data
1913 * @dev: network device
1915 * Get network device private data
1917 static inline void *netdev_priv(const struct net_device *dev)
1919 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1922 /* Set the sysfs physical device reference for the network logical device
1923 * if set prior to registration will cause a symlink during initialization.
1925 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1927 /* Set the sysfs device type for the network logical device to allow
1928 * fine-grained identification of different network device types. For
1929 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1931 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1933 /* Default NAPI poll() weight
1934 * Device drivers are strongly advised to not use bigger value
1936 #define NAPI_POLL_WEIGHT 64
1939 * netif_napi_add - initialize a napi context
1940 * @dev: network device
1941 * @napi: napi context
1942 * @poll: polling function
1943 * @weight: default weight
1945 * netif_napi_add() must be used to initialize a napi context prior to calling
1946 * *any* of the other napi related functions.
1948 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1949 int (*poll)(struct napi_struct *, int), int weight);
1952 * netif_napi_del - remove a napi context
1953 * @napi: napi context
1955 * netif_napi_del() removes a napi context from the network device napi list
1957 void netif_napi_del(struct napi_struct *napi);
1959 struct napi_gro_cb {
1960 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1963 /* Length of frag0. */
1964 unsigned int frag0_len;
1966 /* This indicates where we are processing relative to skb->data. */
1969 /* This is non-zero if the packet cannot be merged with the new skb. */
1972 /* Save the IP ID here and check when we get to the transport layer */
1975 /* Number of segments aggregated. */
1978 /* Start offset for remote checksum offload */
1979 u16 gro_remcsum_start;
1981 /* jiffies when first packet was created/queued */
1984 /* Used in ipv6_gro_receive() and foo-over-udp */
1987 /* This is non-zero if the packet may be of the same flow. */
1990 /* Used in udp_gro_receive */
1993 /* GRO checksum is valid */
1996 /* Number of checksums via CHECKSUM_UNNECESSARY */
2001 #define NAPI_GRO_FREE 1
2002 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2004 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2009 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2012 /* used in skb_gro_receive() slow path */
2013 struct sk_buff *last;
2016 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2018 struct packet_type {
2019 __be16 type; /* This is really htons(ether_type). */
2020 struct net_device *dev; /* NULL is wildcarded here */
2021 int (*func) (struct sk_buff *,
2022 struct net_device *,
2023 struct packet_type *,
2024 struct net_device *);
2025 bool (*id_match)(struct packet_type *ptype,
2027 void *af_packet_priv;
2028 struct list_head list;
2031 struct offload_callbacks {
2032 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2033 netdev_features_t features);
2034 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2035 struct sk_buff *skb);
2036 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2039 struct packet_offload {
2040 __be16 type; /* This is really htons(ether_type). */
2042 struct offload_callbacks callbacks;
2043 struct list_head list;
2048 struct udp_offload_callbacks {
2049 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2050 struct sk_buff *skb,
2051 struct udp_offload *uoff);
2052 int (*gro_complete)(struct sk_buff *skb,
2054 struct udp_offload *uoff);
2057 struct udp_offload {
2060 struct udp_offload_callbacks callbacks;
2063 /* often modified stats are per cpu, other are shared (netdev->stats) */
2064 struct pcpu_sw_netstats {
2069 struct u64_stats_sync syncp;
2072 #define __netdev_alloc_pcpu_stats(type, gfp) \
2074 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2077 for_each_possible_cpu(__cpu) { \
2078 typeof(type) *stat; \
2079 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2080 u64_stats_init(&stat->syncp); \
2086 #define netdev_alloc_pcpu_stats(type) \
2087 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2089 #include <linux/notifier.h>
2091 /* netdevice notifier chain. Please remember to update the rtnetlink
2092 * notification exclusion list in rtnetlink_event() when adding new
2095 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2096 #define NETDEV_DOWN 0x0002
2097 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2098 detected a hardware crash and restarted
2099 - we can use this eg to kick tcp sessions
2101 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2102 #define NETDEV_REGISTER 0x0005
2103 #define NETDEV_UNREGISTER 0x0006
2104 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2105 #define NETDEV_CHANGEADDR 0x0008
2106 #define NETDEV_GOING_DOWN 0x0009
2107 #define NETDEV_CHANGENAME 0x000A
2108 #define NETDEV_FEAT_CHANGE 0x000B
2109 #define NETDEV_BONDING_FAILOVER 0x000C
2110 #define NETDEV_PRE_UP 0x000D
2111 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2112 #define NETDEV_POST_TYPE_CHANGE 0x000F
2113 #define NETDEV_POST_INIT 0x0010
2114 #define NETDEV_UNREGISTER_FINAL 0x0011
2115 #define NETDEV_RELEASE 0x0012
2116 #define NETDEV_NOTIFY_PEERS 0x0013
2117 #define NETDEV_JOIN 0x0014
2118 #define NETDEV_CHANGEUPPER 0x0015
2119 #define NETDEV_RESEND_IGMP 0x0016
2120 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2121 #define NETDEV_CHANGEINFODATA 0x0018
2122 #define NETDEV_BONDING_INFO 0x0019
2123 #define NETDEV_PRECHANGEUPPER 0x001A
2125 int register_netdevice_notifier(struct notifier_block *nb);
2126 int unregister_netdevice_notifier(struct notifier_block *nb);
2128 struct netdev_notifier_info {
2129 struct net_device *dev;
2132 struct netdev_notifier_change_info {
2133 struct netdev_notifier_info info; /* must be first */
2134 unsigned int flags_changed;
2137 struct netdev_notifier_changeupper_info {
2138 struct netdev_notifier_info info; /* must be first */
2139 struct net_device *upper_dev; /* new upper dev */
2140 bool master; /* is upper dev master */
2141 bool linking; /* is the nofication for link or unlink */
2144 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2145 struct net_device *dev)
2150 static inline struct net_device *
2151 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2156 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2159 extern rwlock_t dev_base_lock; /* Device list lock */
2161 #define for_each_netdev(net, d) \
2162 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2163 #define for_each_netdev_reverse(net, d) \
2164 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2165 #define for_each_netdev_rcu(net, d) \
2166 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2167 #define for_each_netdev_safe(net, d, n) \
2168 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2169 #define for_each_netdev_continue(net, d) \
2170 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2171 #define for_each_netdev_continue_rcu(net, d) \
2172 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2173 #define for_each_netdev_in_bond_rcu(bond, slave) \
2174 for_each_netdev_rcu(&init_net, slave) \
2175 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2176 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2178 static inline struct net_device *next_net_device(struct net_device *dev)
2180 struct list_head *lh;
2184 lh = dev->dev_list.next;
2185 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2188 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2190 struct list_head *lh;
2194 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2195 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2198 static inline struct net_device *first_net_device(struct net *net)
2200 return list_empty(&net->dev_base_head) ? NULL :
2201 net_device_entry(net->dev_base_head.next);
2204 static inline struct net_device *first_net_device_rcu(struct net *net)
2206 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2208 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2211 int netdev_boot_setup_check(struct net_device *dev);
2212 unsigned long netdev_boot_base(const char *prefix, int unit);
2213 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2214 const char *hwaddr);
2215 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2216 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2217 void dev_add_pack(struct packet_type *pt);
2218 void dev_remove_pack(struct packet_type *pt);
2219 void __dev_remove_pack(struct packet_type *pt);
2220 void dev_add_offload(struct packet_offload *po);
2221 void dev_remove_offload(struct packet_offload *po);
2223 int dev_get_iflink(const struct net_device *dev);
2224 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2225 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2226 unsigned short mask);
2227 struct net_device *dev_get_by_name(struct net *net, const char *name);
2228 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2229 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2230 int dev_alloc_name(struct net_device *dev, const char *name);
2231 int dev_open(struct net_device *dev);
2232 int dev_close(struct net_device *dev);
2233 int dev_close_many(struct list_head *head, bool unlink);
2234 void dev_disable_lro(struct net_device *dev);
2235 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2236 int dev_queue_xmit(struct sk_buff *skb);
2237 int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2238 int register_netdevice(struct net_device *dev);
2239 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2240 void unregister_netdevice_many(struct list_head *head);
2241 static inline void unregister_netdevice(struct net_device *dev)
2243 unregister_netdevice_queue(dev, NULL);
2246 int netdev_refcnt_read(const struct net_device *dev);
2247 void free_netdev(struct net_device *dev);
2248 void netdev_freemem(struct net_device *dev);
2249 void synchronize_net(void);
2250 int init_dummy_netdev(struct net_device *dev);
2252 DECLARE_PER_CPU(int, xmit_recursion);
2253 static inline int dev_recursion_level(void)
2255 return this_cpu_read(xmit_recursion);
2258 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2259 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2260 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2261 int netdev_get_name(struct net *net, char *name, int ifindex);
2262 int dev_restart(struct net_device *dev);
2263 int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2265 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2267 return NAPI_GRO_CB(skb)->data_offset;
2270 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2272 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2275 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2277 NAPI_GRO_CB(skb)->data_offset += len;
2280 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2281 unsigned int offset)
2283 return NAPI_GRO_CB(skb)->frag0 + offset;
2286 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2288 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2291 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2292 unsigned int offset)
2294 if (!pskb_may_pull(skb, hlen))
2297 NAPI_GRO_CB(skb)->frag0 = NULL;
2298 NAPI_GRO_CB(skb)->frag0_len = 0;
2299 return skb->data + offset;
2302 static inline void *skb_gro_network_header(struct sk_buff *skb)
2304 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2305 skb_network_offset(skb);
2308 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2309 const void *start, unsigned int len)
2311 if (NAPI_GRO_CB(skb)->csum_valid)
2312 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2313 csum_partial(start, len, 0));
2316 /* GRO checksum functions. These are logical equivalents of the normal
2317 * checksum functions (in skbuff.h) except that they operate on the GRO
2318 * offsets and fields in sk_buff.
2321 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2323 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2325 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2328 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2332 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2333 skb_checksum_start_offset(skb) <
2334 skb_gro_offset(skb)) &&
2335 !skb_at_gro_remcsum_start(skb) &&
2336 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2337 (!zero_okay || check));
2340 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2343 if (NAPI_GRO_CB(skb)->csum_valid &&
2344 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2347 NAPI_GRO_CB(skb)->csum = psum;
2349 return __skb_gro_checksum_complete(skb);
2352 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2354 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2355 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2356 NAPI_GRO_CB(skb)->csum_cnt--;
2358 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2359 * verified a new top level checksum or an encapsulated one
2360 * during GRO. This saves work if we fallback to normal path.
2362 __skb_incr_checksum_unnecessary(skb);
2366 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2369 __sum16 __ret = 0; \
2370 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2371 __ret = __skb_gro_checksum_validate_complete(skb, \
2372 compute_pseudo(skb, proto)); \
2374 __skb_mark_checksum_bad(skb); \
2376 skb_gro_incr_csum_unnecessary(skb); \
2380 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2381 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2383 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2385 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2387 #define skb_gro_checksum_simple_validate(skb) \
2388 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2390 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2392 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2393 !NAPI_GRO_CB(skb)->csum_valid);
2396 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2397 __sum16 check, __wsum pseudo)
2399 NAPI_GRO_CB(skb)->csum = ~pseudo;
2400 NAPI_GRO_CB(skb)->csum_valid = 1;
2403 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2405 if (__skb_gro_checksum_convert_check(skb)) \
2406 __skb_gro_checksum_convert(skb, check, \
2407 compute_pseudo(skb, proto)); \
2410 struct gro_remcsum {
2415 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2421 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2422 unsigned int off, size_t hdrlen,
2423 int start, int offset,
2424 struct gro_remcsum *grc,
2428 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2430 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2433 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2437 ptr = skb_gro_header_fast(skb, off);
2438 if (skb_gro_header_hard(skb, off + plen)) {
2439 ptr = skb_gro_header_slow(skb, off + plen, off);
2444 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2447 /* Adjust skb->csum since we changed the packet */
2448 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2450 grc->offset = off + hdrlen + offset;
2456 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2457 struct gro_remcsum *grc)
2460 size_t plen = grc->offset + sizeof(u16);
2465 ptr = skb_gro_header_fast(skb, grc->offset);
2466 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2467 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2472 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2475 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2476 unsigned short type,
2477 const void *daddr, const void *saddr,
2480 if (!dev->header_ops || !dev->header_ops->create)
2483 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2486 static inline int dev_parse_header(const struct sk_buff *skb,
2487 unsigned char *haddr)
2489 const struct net_device *dev = skb->dev;
2491 if (!dev->header_ops || !dev->header_ops->parse)
2493 return dev->header_ops->parse(skb, haddr);
2496 /* ll_header must have at least hard_header_len allocated */
2497 static inline bool dev_validate_header(const struct net_device *dev,
2498 char *ll_header, int len)
2500 if (likely(len >= dev->hard_header_len))
2503 if (capable(CAP_SYS_RAWIO)) {
2504 memset(ll_header + len, 0, dev->hard_header_len - len);
2508 if (dev->header_ops && dev->header_ops->validate)
2509 return dev->header_ops->validate(ll_header, len);
2514 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2515 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2516 static inline int unregister_gifconf(unsigned int family)
2518 return register_gifconf(family, NULL);
2521 #ifdef CONFIG_NET_FLOW_LIMIT
2522 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2523 struct sd_flow_limit {
2525 unsigned int num_buckets;
2526 unsigned int history_head;
2527 u16 history[FLOW_LIMIT_HISTORY];
2531 extern int netdev_flow_limit_table_len;
2532 #endif /* CONFIG_NET_FLOW_LIMIT */
2535 * Incoming packets are placed on per-cpu queues
2537 struct softnet_data {
2538 struct list_head poll_list;
2539 struct sk_buff_head process_queue;
2542 unsigned int processed;
2543 unsigned int time_squeeze;
2544 unsigned int cpu_collision;
2545 unsigned int received_rps;
2547 struct softnet_data *rps_ipi_list;
2549 #ifdef CONFIG_NET_FLOW_LIMIT
2550 struct sd_flow_limit __rcu *flow_limit;
2552 struct Qdisc *output_queue;
2553 struct Qdisc **output_queue_tailp;
2554 struct sk_buff *completion_queue;
2557 /* Elements below can be accessed between CPUs for RPS */
2558 struct call_single_data csd ____cacheline_aligned_in_smp;
2559 struct softnet_data *rps_ipi_next;
2561 unsigned int input_queue_head;
2562 unsigned int input_queue_tail;
2564 unsigned int dropped;
2565 struct sk_buff_head input_pkt_queue;
2566 struct napi_struct backlog;
2570 static inline void input_queue_head_incr(struct softnet_data *sd)
2573 sd->input_queue_head++;
2577 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2578 unsigned int *qtail)
2581 *qtail = ++sd->input_queue_tail;
2585 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2587 void __netif_schedule(struct Qdisc *q);
2588 void netif_schedule_queue(struct netdev_queue *txq);
2590 static inline void netif_tx_schedule_all(struct net_device *dev)
2594 for (i = 0; i < dev->num_tx_queues; i++)
2595 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2598 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2600 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2604 * netif_start_queue - allow transmit
2605 * @dev: network device
2607 * Allow upper layers to call the device hard_start_xmit routine.
2609 static inline void netif_start_queue(struct net_device *dev)
2611 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2614 static inline void netif_tx_start_all_queues(struct net_device *dev)
2618 for (i = 0; i < dev->num_tx_queues; i++) {
2619 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2620 netif_tx_start_queue(txq);
2624 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2627 * netif_wake_queue - restart transmit
2628 * @dev: network device
2630 * Allow upper layers to call the device hard_start_xmit routine.
2631 * Used for flow control when transmit resources are available.
2633 static inline void netif_wake_queue(struct net_device *dev)
2635 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2638 static inline void netif_tx_wake_all_queues(struct net_device *dev)
2642 for (i = 0; i < dev->num_tx_queues; i++) {
2643 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2644 netif_tx_wake_queue(txq);
2648 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2650 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2654 * netif_stop_queue - stop transmitted packets
2655 * @dev: network device
2657 * Stop upper layers calling the device hard_start_xmit routine.
2658 * Used for flow control when transmit resources are unavailable.
2660 static inline void netif_stop_queue(struct net_device *dev)
2662 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2665 void netif_tx_stop_all_queues(struct net_device *dev);
2667 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2669 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2673 * netif_queue_stopped - test if transmit queue is flowblocked
2674 * @dev: network device
2676 * Test if transmit queue on device is currently unable to send.
2678 static inline bool netif_queue_stopped(const struct net_device *dev)
2680 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2683 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2685 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2689 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2691 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2695 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2697 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2701 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2702 * @dev_queue: pointer to transmit queue
2704 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2705 * to give appropriate hint to the cpu.
2707 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2710 prefetchw(&dev_queue->dql.num_queued);
2715 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2716 * @dev_queue: pointer to transmit queue
2718 * BQL enabled drivers might use this helper in their TX completion path,
2719 * to give appropriate hint to the cpu.
2721 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
2724 prefetchw(&dev_queue->dql.limit);
2728 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2732 dql_queued(&dev_queue->dql, bytes);
2734 if (likely(dql_avail(&dev_queue->dql) >= 0))
2737 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2740 * The XOFF flag must be set before checking the dql_avail below,
2741 * because in netdev_tx_completed_queue we update the dql_completed
2742 * before checking the XOFF flag.
2746 /* check again in case another CPU has just made room avail */
2747 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2748 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2753 * netdev_sent_queue - report the number of bytes queued to hardware
2754 * @dev: network device
2755 * @bytes: number of bytes queued to the hardware device queue
2757 * Report the number of bytes queued for sending/completion to the network
2758 * device hardware queue. @bytes should be a good approximation and should
2759 * exactly match netdev_completed_queue() @bytes
2761 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2763 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2766 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2767 unsigned int pkts, unsigned int bytes)
2770 if (unlikely(!bytes))
2773 dql_completed(&dev_queue->dql, bytes);
2776 * Without the memory barrier there is a small possiblity that
2777 * netdev_tx_sent_queue will miss the update and cause the queue to
2778 * be stopped forever
2782 if (dql_avail(&dev_queue->dql) < 0)
2785 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2786 netif_schedule_queue(dev_queue);
2791 * netdev_completed_queue - report bytes and packets completed by device
2792 * @dev: network device
2793 * @pkts: actual number of packets sent over the medium
2794 * @bytes: actual number of bytes sent over the medium
2796 * Report the number of bytes and packets transmitted by the network device
2797 * hardware queue over the physical medium, @bytes must exactly match the
2798 * @bytes amount passed to netdev_sent_queue()
2800 static inline void netdev_completed_queue(struct net_device *dev,
2801 unsigned int pkts, unsigned int bytes)
2803 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2806 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2809 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
2815 * netdev_reset_queue - reset the packets and bytes count of a network device
2816 * @dev_queue: network device
2818 * Reset the bytes and packet count of a network device and clear the
2819 * software flow control OFF bit for this network device
2821 static inline void netdev_reset_queue(struct net_device *dev_queue)
2823 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2827 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2828 * @dev: network device
2829 * @queue_index: given tx queue index
2831 * Returns 0 if given tx queue index >= number of device tx queues,
2832 * otherwise returns the originally passed tx queue index.
2834 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
2836 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
2837 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2838 dev->name, queue_index,
2839 dev->real_num_tx_queues);
2847 * netif_running - test if up
2848 * @dev: network device
2850 * Test if the device has been brought up.
2852 static inline bool netif_running(const struct net_device *dev)
2854 return test_bit(__LINK_STATE_START, &dev->state);
2858 * Routines to manage the subqueues on a device. We only need start
2859 * stop, and a check if it's stopped. All other device management is
2860 * done at the overall netdevice level.
2861 * Also test the device if we're multiqueue.
2865 * netif_start_subqueue - allow sending packets on subqueue
2866 * @dev: network device
2867 * @queue_index: sub queue index
2869 * Start individual transmit queue of a device with multiple transmit queues.
2871 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2873 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2875 netif_tx_start_queue(txq);
2879 * netif_stop_subqueue - stop sending packets on subqueue
2880 * @dev: network device
2881 * @queue_index: sub queue index
2883 * Stop individual transmit queue of a device with multiple transmit queues.
2885 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
2887 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2888 netif_tx_stop_queue(txq);
2892 * netif_subqueue_stopped - test status of subqueue
2893 * @dev: network device
2894 * @queue_index: sub queue index
2896 * Check individual transmit queue of a device with multiple transmit queues.
2898 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
2901 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2903 return netif_tx_queue_stopped(txq);
2906 static inline bool netif_subqueue_stopped(const struct net_device *dev,
2907 struct sk_buff *skb)
2909 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
2912 void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
2915 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
2918 static inline int netif_set_xps_queue(struct net_device *dev,
2919 const struct cpumask *mask,
2926 u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
2927 unsigned int num_tx_queues);
2930 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2931 * as a distribution range limit for the returned value.
2933 static inline u16 skb_tx_hash(const struct net_device *dev,
2934 struct sk_buff *skb)
2936 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2940 * netif_is_multiqueue - test if device has multiple transmit queues
2941 * @dev: network device
2943 * Check if device has multiple transmit queues
2945 static inline bool netif_is_multiqueue(const struct net_device *dev)
2947 return dev->num_tx_queues > 1;
2950 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
2953 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
2955 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2963 static inline unsigned int get_netdev_rx_queue_index(
2964 struct netdev_rx_queue *queue)
2966 struct net_device *dev = queue->dev;
2967 int index = queue - dev->_rx;
2969 BUG_ON(index >= dev->num_rx_queues);
2974 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2975 int netif_get_num_default_rss_queues(void);
2977 enum skb_free_reason {
2978 SKB_REASON_CONSUMED,
2982 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
2983 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
2986 * It is not allowed to call kfree_skb() or consume_skb() from hardware
2987 * interrupt context or with hardware interrupts being disabled.
2988 * (in_irq() || irqs_disabled())
2990 * We provide four helpers that can be used in following contexts :
2992 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
2993 * replacing kfree_skb(skb)
2995 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
2996 * Typically used in place of consume_skb(skb) in TX completion path
2998 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
2999 * replacing kfree_skb(skb)
3001 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3002 * and consumed a packet. Used in place of consume_skb(skb)
3004 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3006 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3009 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3011 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3014 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3016 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3019 static inline void dev_consume_skb_any(struct sk_buff *skb)
3021 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3024 int netif_rx(struct sk_buff *skb);
3025 int netif_rx_ni(struct sk_buff *skb);
3026 int netif_receive_skb(struct sk_buff *skb);
3027 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3028 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3029 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3030 gro_result_t napi_gro_frags(struct napi_struct *napi);
3031 struct packet_offload *gro_find_receive_by_type(__be16 type);
3032 struct packet_offload *gro_find_complete_by_type(__be16 type);
3034 static inline void napi_free_frags(struct napi_struct *napi)
3036 kfree_skb(napi->skb);
3040 int netdev_rx_handler_register(struct net_device *dev,
3041 rx_handler_func_t *rx_handler,
3042 void *rx_handler_data);
3043 void netdev_rx_handler_unregister(struct net_device *dev);
3045 bool dev_valid_name(const char *name);
3046 int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
3047 int dev_ethtool(struct net *net, struct ifreq *);
3048 unsigned int dev_get_flags(const struct net_device *);
3049 int __dev_change_flags(struct net_device *, unsigned int flags);
3050 int dev_change_flags(struct net_device *, unsigned int);
3051 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3052 unsigned int gchanges);
3053 int dev_change_name(struct net_device *, const char *);
3054 int dev_set_alias(struct net_device *, const char *, size_t);
3055 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3056 int dev_set_mtu(struct net_device *, int);
3057 void dev_set_group(struct net_device *, int);
3058 int dev_set_mac_address(struct net_device *, struct sockaddr *);
3059 int dev_change_carrier(struct net_device *, bool new_carrier);
3060 int dev_get_phys_port_id(struct net_device *dev,
3061 struct netdev_phys_item_id *ppid);
3062 int dev_get_phys_port_name(struct net_device *dev,
3063 char *name, size_t len);
3064 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3065 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
3066 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3067 struct netdev_queue *txq, int *ret);
3068 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3069 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3070 bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
3072 extern int netdev_budget;
3074 /* Called by rtnetlink.c:rtnl_unlock() */
3075 void netdev_run_todo(void);
3078 * dev_put - release reference to device
3079 * @dev: network device
3081 * Release reference to device to allow it to be freed.
3083 static inline void dev_put(struct net_device *dev)
3085 this_cpu_dec(*dev->pcpu_refcnt);
3089 * dev_hold - get reference to device
3090 * @dev: network device
3092 * Hold reference to device to keep it from being freed.
3094 static inline void dev_hold(struct net_device *dev)
3096 this_cpu_inc(*dev->pcpu_refcnt);
3099 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3100 * and _off may be called from IRQ context, but it is caller
3101 * who is responsible for serialization of these calls.
3103 * The name carrier is inappropriate, these functions should really be
3104 * called netif_lowerlayer_*() because they represent the state of any
3105 * kind of lower layer not just hardware media.
3108 void linkwatch_init_dev(struct net_device *dev);
3109 void linkwatch_fire_event(struct net_device *dev);
3110 void linkwatch_forget_dev(struct net_device *dev);
3113 * netif_carrier_ok - test if carrier present
3114 * @dev: network device
3116 * Check if carrier is present on device
3118 static inline bool netif_carrier_ok(const struct net_device *dev)
3120 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3123 unsigned long dev_trans_start(struct net_device *dev);
3125 void __netdev_watchdog_up(struct net_device *dev);
3127 void netif_carrier_on(struct net_device *dev);
3129 void netif_carrier_off(struct net_device *dev);
3132 * netif_dormant_on - mark device as dormant.
3133 * @dev: network device
3135 * Mark device as dormant (as per RFC2863).
3137 * The dormant state indicates that the relevant interface is not
3138 * actually in a condition to pass packets (i.e., it is not 'up') but is
3139 * in a "pending" state, waiting for some external event. For "on-
3140 * demand" interfaces, this new state identifies the situation where the
3141 * interface is waiting for events to place it in the up state.
3144 static inline void netif_dormant_on(struct net_device *dev)
3146 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3147 linkwatch_fire_event(dev);
3151 * netif_dormant_off - set device as not dormant.
3152 * @dev: network device
3154 * Device is not in dormant state.
3156 static inline void netif_dormant_off(struct net_device *dev)
3158 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3159 linkwatch_fire_event(dev);
3163 * netif_dormant - test if carrier present
3164 * @dev: network device
3166 * Check if carrier is present on device
3168 static inline bool netif_dormant(const struct net_device *dev)
3170 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3175 * netif_oper_up - test if device is operational
3176 * @dev: network device
3178 * Check if carrier is operational
3180 static inline bool netif_oper_up(const struct net_device *dev)
3182 return (dev->operstate == IF_OPER_UP ||
3183 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3187 * netif_device_present - is device available or removed
3188 * @dev: network device
3190 * Check if device has not been removed from system.
3192 static inline bool netif_device_present(struct net_device *dev)
3194 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3197 void netif_device_detach(struct net_device *dev);
3199 void netif_device_attach(struct net_device *dev);
3202 * Network interface message level settings
3206 NETIF_MSG_DRV = 0x0001,
3207 NETIF_MSG_PROBE = 0x0002,
3208 NETIF_MSG_LINK = 0x0004,
3209 NETIF_MSG_TIMER = 0x0008,
3210 NETIF_MSG_IFDOWN = 0x0010,
3211 NETIF_MSG_IFUP = 0x0020,
3212 NETIF_MSG_RX_ERR = 0x0040,
3213 NETIF_MSG_TX_ERR = 0x0080,
3214 NETIF_MSG_TX_QUEUED = 0x0100,
3215 NETIF_MSG_INTR = 0x0200,
3216 NETIF_MSG_TX_DONE = 0x0400,
3217 NETIF_MSG_RX_STATUS = 0x0800,
3218 NETIF_MSG_PKTDATA = 0x1000,
3219 NETIF_MSG_HW = 0x2000,
3220 NETIF_MSG_WOL = 0x4000,
3223 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3224 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3225 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3226 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3227 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3228 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3229 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3230 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3231 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3232 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3233 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3234 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3235 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3236 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3237 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3239 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3242 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3243 return default_msg_enable_bits;
3244 if (debug_value == 0) /* no output */
3246 /* set low N bits */
3247 return (1 << debug_value) - 1;
3250 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3252 spin_lock(&txq->_xmit_lock);
3253 txq->xmit_lock_owner = cpu;
3256 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3258 spin_lock_bh(&txq->_xmit_lock);
3259 txq->xmit_lock_owner = smp_processor_id();
3262 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3264 bool ok = spin_trylock(&txq->_xmit_lock);
3266 txq->xmit_lock_owner = smp_processor_id();
3270 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3272 txq->xmit_lock_owner = -1;
3273 spin_unlock(&txq->_xmit_lock);
3276 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3278 txq->xmit_lock_owner = -1;
3279 spin_unlock_bh(&txq->_xmit_lock);
3282 static inline void txq_trans_update(struct netdev_queue *txq)
3284 if (txq->xmit_lock_owner != -1)
3285 txq->trans_start = jiffies;
3289 * netif_tx_lock - grab network device transmit lock
3290 * @dev: network device
3292 * Get network device transmit lock
3294 static inline void netif_tx_lock(struct net_device *dev)
3299 spin_lock(&dev->tx_global_lock);
3300 cpu = smp_processor_id();
3301 for (i = 0; i < dev->num_tx_queues; i++) {
3302 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3304 /* We are the only thread of execution doing a
3305 * freeze, but we have to grab the _xmit_lock in
3306 * order to synchronize with threads which are in
3307 * the ->hard_start_xmit() handler and already
3308 * checked the frozen bit.
3310 __netif_tx_lock(txq, cpu);
3311 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3312 __netif_tx_unlock(txq);
3316 static inline void netif_tx_lock_bh(struct net_device *dev)
3322 static inline void netif_tx_unlock(struct net_device *dev)
3326 for (i = 0; i < dev->num_tx_queues; i++) {
3327 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3329 /* No need to grab the _xmit_lock here. If the
3330 * queue is not stopped for another reason, we
3333 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3334 netif_schedule_queue(txq);
3336 spin_unlock(&dev->tx_global_lock);
3339 static inline void netif_tx_unlock_bh(struct net_device *dev)
3341 netif_tx_unlock(dev);
3345 #define HARD_TX_LOCK(dev, txq, cpu) { \
3346 if ((dev->features & NETIF_F_LLTX) == 0) { \
3347 __netif_tx_lock(txq, cpu); \
3351 #define HARD_TX_TRYLOCK(dev, txq) \
3352 (((dev->features & NETIF_F_LLTX) == 0) ? \
3353 __netif_tx_trylock(txq) : \
3356 #define HARD_TX_UNLOCK(dev, txq) { \
3357 if ((dev->features & NETIF_F_LLTX) == 0) { \
3358 __netif_tx_unlock(txq); \
3362 static inline void netif_tx_disable(struct net_device *dev)
3368 cpu = smp_processor_id();
3369 for (i = 0; i < dev->num_tx_queues; i++) {
3370 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3372 __netif_tx_lock(txq, cpu);
3373 netif_tx_stop_queue(txq);
3374 __netif_tx_unlock(txq);
3379 static inline void netif_addr_lock(struct net_device *dev)
3381 spin_lock(&dev->addr_list_lock);
3384 static inline void netif_addr_lock_nested(struct net_device *dev)
3386 int subclass = SINGLE_DEPTH_NESTING;
3388 if (dev->netdev_ops->ndo_get_lock_subclass)
3389 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3391 spin_lock_nested(&dev->addr_list_lock, subclass);
3394 static inline void netif_addr_lock_bh(struct net_device *dev)
3396 spin_lock_bh(&dev->addr_list_lock);
3399 static inline void netif_addr_unlock(struct net_device *dev)
3401 spin_unlock(&dev->addr_list_lock);
3404 static inline void netif_addr_unlock_bh(struct net_device *dev)
3406 spin_unlock_bh(&dev->addr_list_lock);
3410 * dev_addrs walker. Should be used only for read access. Call with
3411 * rcu_read_lock held.
3413 #define for_each_dev_addr(dev, ha) \
3414 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3416 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3418 void ether_setup(struct net_device *dev);
3420 /* Support for loadable net-drivers */
3421 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3422 unsigned char name_assign_type,
3423 void (*setup)(struct net_device *),
3424 unsigned int txqs, unsigned int rxqs);
3425 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3426 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3428 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3429 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3432 int register_netdev(struct net_device *dev);
3433 void unregister_netdev(struct net_device *dev);
3435 /* General hardware address lists handling functions */
3436 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3437 struct netdev_hw_addr_list *from_list, int addr_len);
3438 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3439 struct netdev_hw_addr_list *from_list, int addr_len);
3440 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3441 struct net_device *dev,
3442 int (*sync)(struct net_device *, const unsigned char *),
3443 int (*unsync)(struct net_device *,
3444 const unsigned char *));
3445 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3446 struct net_device *dev,
3447 int (*unsync)(struct net_device *,
3448 const unsigned char *));
3449 void __hw_addr_init(struct netdev_hw_addr_list *list);
3451 /* Functions used for device addresses handling */
3452 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3453 unsigned char addr_type);
3454 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3455 unsigned char addr_type);
3456 void dev_addr_flush(struct net_device *dev);
3457 int dev_addr_init(struct net_device *dev);
3459 /* Functions used for unicast addresses handling */
3460 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3461 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3462 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3463 int dev_uc_sync(struct net_device *to, struct net_device *from);
3464 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3465 void dev_uc_unsync(struct net_device *to, struct net_device *from);
3466 void dev_uc_flush(struct net_device *dev);
3467 void dev_uc_init(struct net_device *dev);
3470 * __dev_uc_sync - Synchonize device's unicast list
3471 * @dev: device to sync
3472 * @sync: function to call if address should be added
3473 * @unsync: function to call if address should be removed
3475 * Add newly added addresses to the interface, and release
3476 * addresses that have been deleted.
3478 static inline int __dev_uc_sync(struct net_device *dev,
3479 int (*sync)(struct net_device *,
3480 const unsigned char *),
3481 int (*unsync)(struct net_device *,
3482 const unsigned char *))
3484 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3488 * __dev_uc_unsync - Remove synchronized addresses from device
3489 * @dev: device to sync
3490 * @unsync: function to call if address should be removed
3492 * Remove all addresses that were added to the device by dev_uc_sync().
3494 static inline void __dev_uc_unsync(struct net_device *dev,
3495 int (*unsync)(struct net_device *,
3496 const unsigned char *))
3498 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3501 /* Functions used for multicast addresses handling */
3502 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3503 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3504 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3505 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3506 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3507 int dev_mc_sync(struct net_device *to, struct net_device *from);
3508 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3509 void dev_mc_unsync(struct net_device *to, struct net_device *from);
3510 void dev_mc_flush(struct net_device *dev);
3511 void dev_mc_init(struct net_device *dev);
3514 * __dev_mc_sync - Synchonize device's multicast list
3515 * @dev: device to sync
3516 * @sync: function to call if address should be added
3517 * @unsync: function to call if address should be removed
3519 * Add newly added addresses to the interface, and release
3520 * addresses that have been deleted.
3522 static inline int __dev_mc_sync(struct net_device *dev,
3523 int (*sync)(struct net_device *,
3524 const unsigned char *),
3525 int (*unsync)(struct net_device *,
3526 const unsigned char *))
3528 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3532 * __dev_mc_unsync - Remove synchronized addresses from device
3533 * @dev: device to sync
3534 * @unsync: function to call if address should be removed
3536 * Remove all addresses that were added to the device by dev_mc_sync().
3538 static inline void __dev_mc_unsync(struct net_device *dev,
3539 int (*unsync)(struct net_device *,
3540 const unsigned char *))
3542 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3545 /* Functions used for secondary unicast and multicast support */
3546 void dev_set_rx_mode(struct net_device *dev);
3547 void __dev_set_rx_mode(struct net_device *dev);
3548 int dev_set_promiscuity(struct net_device *dev, int inc);
3549 int dev_set_allmulti(struct net_device *dev, int inc);
3550 void netdev_state_change(struct net_device *dev);
3551 void netdev_notify_peers(struct net_device *dev);
3552 void netdev_features_change(struct net_device *dev);
3553 /* Load a device via the kmod */
3554 void dev_load(struct net *net, const char *name);
3555 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3556 struct rtnl_link_stats64 *storage);
3557 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3558 const struct net_device_stats *netdev_stats);
3560 extern int netdev_max_backlog;
3561 extern int netdev_tstamp_prequeue;
3562 extern int weight_p;
3563 extern int bpf_jit_enable;
3565 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3566 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3567 struct list_head **iter);
3568 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3569 struct list_head **iter);
3571 /* iterate through upper list, must be called under RCU read lock */
3572 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3573 for (iter = &(dev)->adj_list.upper, \
3574 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3576 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3578 /* iterate through upper list, must be called under RCU read lock */
3579 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3580 for (iter = &(dev)->all_adj_list.upper, \
3581 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3583 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3585 void *netdev_lower_get_next_private(struct net_device *dev,
3586 struct list_head **iter);
3587 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3588 struct list_head **iter);
3590 #define netdev_for_each_lower_private(dev, priv, iter) \
3591 for (iter = (dev)->adj_list.lower.next, \
3592 priv = netdev_lower_get_next_private(dev, &(iter)); \
3594 priv = netdev_lower_get_next_private(dev, &(iter)))
3596 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3597 for (iter = &(dev)->adj_list.lower, \
3598 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3600 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3602 void *netdev_lower_get_next(struct net_device *dev,
3603 struct list_head **iter);
3604 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3605 for (iter = &(dev)->adj_list.lower, \
3606 ldev = netdev_lower_get_next(dev, &(iter)); \
3608 ldev = netdev_lower_get_next(dev, &(iter)))
3610 void *netdev_adjacent_get_private(struct list_head *adj_list);
3611 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3612 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3613 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3614 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
3615 int netdev_master_upper_dev_link(struct net_device *dev,
3616 struct net_device *upper_dev);
3617 int netdev_master_upper_dev_link_private(struct net_device *dev,
3618 struct net_device *upper_dev,
3620 void netdev_upper_dev_unlink(struct net_device *dev,
3621 struct net_device *upper_dev);
3622 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3623 void *netdev_lower_dev_get_private(struct net_device *dev,
3624 struct net_device *lower_dev);
3626 /* RSS keys are 40 or 52 bytes long */
3627 #define NETDEV_RSS_KEY_LEN 52
3628 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
3629 void netdev_rss_key_fill(void *buffer, size_t len);
3631 int dev_get_nest_level(struct net_device *dev,
3632 bool (*type_check)(struct net_device *dev));
3633 int skb_checksum_help(struct sk_buff *skb);
3634 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
3635 netdev_features_t features, bool tx_path);
3636 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
3637 netdev_features_t features);
3639 struct netdev_bonding_info {
3644 struct netdev_notifier_bonding_info {
3645 struct netdev_notifier_info info; /* must be first */
3646 struct netdev_bonding_info bonding_info;
3649 void netdev_bonding_info_change(struct net_device *dev,
3650 struct netdev_bonding_info *bonding_info);
3653 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
3655 return __skb_gso_segment(skb, features, true);
3657 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3659 static inline bool can_checksum_protocol(netdev_features_t features,
3662 return ((features & NETIF_F_GEN_CSUM) ||
3663 ((features & NETIF_F_V4_CSUM) &&
3664 protocol == htons(ETH_P_IP)) ||
3665 ((features & NETIF_F_V6_CSUM) &&
3666 protocol == htons(ETH_P_IPV6)) ||
3667 ((features & NETIF_F_FCOE_CRC) &&
3668 protocol == htons(ETH_P_FCOE)));
3672 void netdev_rx_csum_fault(struct net_device *dev);
3674 static inline void netdev_rx_csum_fault(struct net_device *dev)
3678 /* rx skb timestamps */
3679 void net_enable_timestamp(void);
3680 void net_disable_timestamp(void);
3682 #ifdef CONFIG_PROC_FS
3683 int __init dev_proc_init(void);
3685 #define dev_proc_init() 0
3688 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3689 struct sk_buff *skb, struct net_device *dev,
3692 skb->xmit_more = more ? 1 : 0;
3693 return ops->ndo_start_xmit(skb, dev);
3696 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3697 struct netdev_queue *txq, bool more)
3699 const struct net_device_ops *ops = dev->netdev_ops;
3702 rc = __netdev_start_xmit(ops, skb, dev, more);
3703 if (rc == NETDEV_TX_OK)
3704 txq_trans_update(txq);
3709 int netdev_class_create_file_ns(struct class_attribute *class_attr,
3711 void netdev_class_remove_file_ns(struct class_attribute *class_attr,
3714 static inline int netdev_class_create_file(struct class_attribute *class_attr)
3716 return netdev_class_create_file_ns(class_attr, NULL);
3719 static inline void netdev_class_remove_file(struct class_attribute *class_attr)
3721 netdev_class_remove_file_ns(class_attr, NULL);
3724 extern struct kobj_ns_type_operations net_ns_type_operations;
3726 const char *netdev_drivername(const struct net_device *dev);
3728 void linkwatch_run_queue(void);
3730 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
3731 netdev_features_t f2)
3733 if (f1 & NETIF_F_GEN_CSUM)
3734 f1 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3735 if (f2 & NETIF_F_GEN_CSUM)
3736 f2 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3738 if (f1 & NETIF_F_GEN_CSUM)
3739 f1 &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3744 static inline netdev_features_t netdev_get_wanted_features(
3745 struct net_device *dev)
3747 return (dev->features & ~dev->hw_features) | dev->wanted_features;
3749 netdev_features_t netdev_increment_features(netdev_features_t all,
3750 netdev_features_t one, netdev_features_t mask);
3752 /* Allow TSO being used on stacked device :
3753 * Performing the GSO segmentation before last device
3754 * is a performance improvement.
3756 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
3757 netdev_features_t mask)
3759 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
3762 int __netdev_update_features(struct net_device *dev);
3763 void netdev_update_features(struct net_device *dev);
3764 void netdev_change_features(struct net_device *dev);
3766 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
3767 struct net_device *dev);
3769 netdev_features_t passthru_features_check(struct sk_buff *skb,
3770 struct net_device *dev,
3771 netdev_features_t features);
3772 netdev_features_t netif_skb_features(struct sk_buff *skb);
3774 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
3776 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
3778 /* check flags correspondence */
3779 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
3780 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
3781 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
3782 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
3783 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
3784 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
3785 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
3786 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
3787 BUILD_BUG_ON(SKB_GSO_IPIP != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT));
3788 BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT));
3789 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
3790 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
3791 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
3793 return (features & feature) == feature;
3796 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
3798 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
3799 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
3802 static inline bool netif_needs_gso(struct sk_buff *skb,
3803 netdev_features_t features)
3805 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
3806 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
3807 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
3810 static inline void netif_set_gso_max_size(struct net_device *dev,
3813 dev->gso_max_size = size;
3816 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
3817 int pulled_hlen, u16 mac_offset,
3820 skb->protocol = protocol;
3821 skb->encapsulation = 1;
3822 skb_push(skb, pulled_hlen);
3823 skb_reset_transport_header(skb);
3824 skb->mac_header = mac_offset;
3825 skb->network_header = skb->mac_header + mac_len;
3826 skb->mac_len = mac_len;
3829 static inline bool netif_is_macvlan(struct net_device *dev)
3831 return dev->priv_flags & IFF_MACVLAN;
3834 static inline bool netif_is_macvlan_port(struct net_device *dev)
3836 return dev->priv_flags & IFF_MACVLAN_PORT;
3839 static inline bool netif_is_ipvlan(struct net_device *dev)
3841 return dev->priv_flags & IFF_IPVLAN_SLAVE;
3844 static inline bool netif_is_ipvlan_port(struct net_device *dev)
3846 return dev->priv_flags & IFF_IPVLAN_MASTER;
3849 static inline bool netif_is_bond_master(struct net_device *dev)
3851 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
3854 static inline bool netif_is_bond_slave(struct net_device *dev)
3856 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
3859 static inline bool netif_supports_nofcs(struct net_device *dev)
3861 return dev->priv_flags & IFF_SUPP_NOFCS;
3864 static inline bool netif_is_l3_master(const struct net_device *dev)
3866 return dev->priv_flags & IFF_L3MDEV_MASTER;
3869 static inline bool netif_is_l3_slave(const struct net_device *dev)
3871 return dev->priv_flags & IFF_L3MDEV_SLAVE;
3874 static inline bool netif_is_bridge_master(const struct net_device *dev)
3876 return dev->priv_flags & IFF_EBRIDGE;
3879 static inline bool netif_is_bridge_port(const struct net_device *dev)
3881 return dev->priv_flags & IFF_BRIDGE_PORT;
3884 static inline bool netif_is_ovs_master(const struct net_device *dev)
3886 return dev->priv_flags & IFF_OPENVSWITCH;
3889 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
3890 static inline void netif_keep_dst(struct net_device *dev)
3892 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
3895 extern struct pernet_operations __net_initdata loopback_net_ops;
3897 /* Logging, debugging and troubleshooting/diagnostic helpers. */
3899 /* netdev_printk helpers, similar to dev_printk */
3901 static inline const char *netdev_name(const struct net_device *dev)
3903 if (!dev->name[0] || strchr(dev->name, '%'))
3904 return "(unnamed net_device)";
3908 static inline const char *netdev_reg_state(const struct net_device *dev)
3910 switch (dev->reg_state) {
3911 case NETREG_UNINITIALIZED: return " (uninitialized)";
3912 case NETREG_REGISTERED: return "";
3913 case NETREG_UNREGISTERING: return " (unregistering)";
3914 case NETREG_UNREGISTERED: return " (unregistered)";
3915 case NETREG_RELEASED: return " (released)";
3916 case NETREG_DUMMY: return " (dummy)";
3919 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
3920 return " (unknown)";
3924 void netdev_printk(const char *level, const struct net_device *dev,
3925 const char *format, ...);
3927 void netdev_emerg(const struct net_device *dev, const char *format, ...);
3929 void netdev_alert(const struct net_device *dev, const char *format, ...);
3931 void netdev_crit(const struct net_device *dev, const char *format, ...);
3933 void netdev_err(const struct net_device *dev, const char *format, ...);
3935 void netdev_warn(const struct net_device *dev, const char *format, ...);
3937 void netdev_notice(const struct net_device *dev, const char *format, ...);
3939 void netdev_info(const struct net_device *dev, const char *format, ...);
3941 #define MODULE_ALIAS_NETDEV(device) \
3942 MODULE_ALIAS("netdev-" device)
3944 #if defined(CONFIG_DYNAMIC_DEBUG)
3945 #define netdev_dbg(__dev, format, args...) \
3947 dynamic_netdev_dbg(__dev, format, ##args); \
3949 #elif defined(DEBUG)
3950 #define netdev_dbg(__dev, format, args...) \
3951 netdev_printk(KERN_DEBUG, __dev, format, ##args)
3953 #define netdev_dbg(__dev, format, args...) \
3956 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
3960 #if defined(VERBOSE_DEBUG)
3961 #define netdev_vdbg netdev_dbg
3964 #define netdev_vdbg(dev, format, args...) \
3967 netdev_printk(KERN_DEBUG, dev, format, ##args); \
3973 * netdev_WARN() acts like dev_printk(), but with the key difference
3974 * of using a WARN/WARN_ON to get the message out, including the
3975 * file/line information and a backtrace.
3977 #define netdev_WARN(dev, format, args...) \
3978 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
3979 netdev_reg_state(dev), ##args)
3981 /* netif printk helpers, similar to netdev_printk */
3983 #define netif_printk(priv, type, level, dev, fmt, args...) \
3985 if (netif_msg_##type(priv)) \
3986 netdev_printk(level, (dev), fmt, ##args); \
3989 #define netif_level(level, priv, type, dev, fmt, args...) \
3991 if (netif_msg_##type(priv)) \
3992 netdev_##level(dev, fmt, ##args); \
3995 #define netif_emerg(priv, type, dev, fmt, args...) \
3996 netif_level(emerg, priv, type, dev, fmt, ##args)
3997 #define netif_alert(priv, type, dev, fmt, args...) \
3998 netif_level(alert, priv, type, dev, fmt, ##args)
3999 #define netif_crit(priv, type, dev, fmt, args...) \
4000 netif_level(crit, priv, type, dev, fmt, ##args)
4001 #define netif_err(priv, type, dev, fmt, args...) \
4002 netif_level(err, priv, type, dev, fmt, ##args)
4003 #define netif_warn(priv, type, dev, fmt, args...) \
4004 netif_level(warn, priv, type, dev, fmt, ##args)
4005 #define netif_notice(priv, type, dev, fmt, args...) \
4006 netif_level(notice, priv, type, dev, fmt, ##args)
4007 #define netif_info(priv, type, dev, fmt, args...) \
4008 netif_level(info, priv, type, dev, fmt, ##args)
4010 #if defined(CONFIG_DYNAMIC_DEBUG)
4011 #define netif_dbg(priv, type, netdev, format, args...) \
4013 if (netif_msg_##type(priv)) \
4014 dynamic_netdev_dbg(netdev, format, ##args); \
4016 #elif defined(DEBUG)
4017 #define netif_dbg(priv, type, dev, format, args...) \
4018 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4020 #define netif_dbg(priv, type, dev, format, args...) \
4023 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4028 #if defined(VERBOSE_DEBUG)
4029 #define netif_vdbg netif_dbg
4031 #define netif_vdbg(priv, type, dev, format, args...) \
4034 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4040 * The list of packet types we will receive (as opposed to discard)
4041 * and the routines to invoke.
4043 * Why 16. Because with 16 the only overlap we get on a hash of the
4044 * low nibble of the protocol value is RARP/SNAP/X.25.
4046 * NOTE: That is no longer true with the addition of VLAN tags. Not
4047 * sure which should go first, but I bet it won't make much
4048 * difference if we are running VLANs. The good news is that
4049 * this protocol won't be in the list unless compiled in, so
4050 * the average user (w/out VLANs) will not be adversely affected.
4066 #define PTYPE_HASH_SIZE (16)
4067 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4069 #endif /* _LINUX_NETDEVICE_H */