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>
54 #include <uapi/linux/pkt_cls.h>
61 /* 802.15.4 specific */
65 void netdev_set_default_ethtool_ops(struct net_device *dev,
66 const struct ethtool_ops *ops);
68 /* Backlog congestion levels */
69 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70 #define NET_RX_DROP 1 /* packet dropped */
73 * Transmit return codes: transmit return codes originate from three different
76 * - qdisc return codes
77 * - driver transmit return codes
80 * Drivers are allowed to return any one of those in their hard_start_xmit()
81 * function. Real network devices commonly used with qdiscs should only return
82 * the driver transmit return codes though - when qdiscs are used, the actual
83 * transmission happens asynchronously, so the value is not propagated to
84 * higher layers. Virtual network devices transmit synchronously, in this case
85 * the driver transmit return codes are consumed by dev_queue_xmit(), all
86 * others are propagated to higher layers.
89 /* qdisc ->enqueue() return codes. */
90 #define NET_XMIT_SUCCESS 0x00
91 #define NET_XMIT_DROP 0x01 /* skb dropped */
92 #define NET_XMIT_CN 0x02 /* congestion notification */
93 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
94 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
96 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
97 * indicates that the device will soon be dropping packets, or already drops
98 * some packets of the same priority; prompting us to send less aggressively. */
99 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
100 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
102 /* Driver transmit return codes */
103 #define NETDEV_TX_MASK 0xf0
106 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
107 NETDEV_TX_OK = 0x00, /* driver took care of packet */
108 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
109 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
111 typedef enum netdev_tx netdev_tx_t;
114 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
115 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
117 static inline bool dev_xmit_complete(int rc)
120 * Positive cases with an skb consumed by a driver:
121 * - successful transmission (rc == NETDEV_TX_OK)
122 * - error while transmitting (rc < 0)
123 * - error while queueing to a different device (rc & NET_XMIT_MASK)
125 if (likely(rc < NET_XMIT_MASK))
132 * Compute the worst case header length according to the protocols
136 #if defined(CONFIG_HYPERV_NET)
137 # define LL_MAX_HEADER 128
138 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
139 # if defined(CONFIG_MAC80211_MESH)
140 # define LL_MAX_HEADER 128
142 # define LL_MAX_HEADER 96
145 # define LL_MAX_HEADER 32
148 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
149 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
150 #define MAX_HEADER LL_MAX_HEADER
152 #define MAX_HEADER (LL_MAX_HEADER + 48)
156 * Old network device statistics. Fields are native words
157 * (unsigned long) so they can be read and written atomically.
160 struct net_device_stats {
161 unsigned long rx_packets;
162 unsigned long tx_packets;
163 unsigned long rx_bytes;
164 unsigned long tx_bytes;
165 unsigned long rx_errors;
166 unsigned long tx_errors;
167 unsigned long rx_dropped;
168 unsigned long tx_dropped;
169 unsigned long multicast;
170 unsigned long collisions;
171 unsigned long rx_length_errors;
172 unsigned long rx_over_errors;
173 unsigned long rx_crc_errors;
174 unsigned long rx_frame_errors;
175 unsigned long rx_fifo_errors;
176 unsigned long rx_missed_errors;
177 unsigned long tx_aborted_errors;
178 unsigned long tx_carrier_errors;
179 unsigned long tx_fifo_errors;
180 unsigned long tx_heartbeat_errors;
181 unsigned long tx_window_errors;
182 unsigned long rx_compressed;
183 unsigned long tx_compressed;
187 #include <linux/cache.h>
188 #include <linux/skbuff.h>
191 #include <linux/static_key.h>
192 extern struct static_key rps_needed;
199 struct netdev_hw_addr {
200 struct list_head list;
201 unsigned char addr[MAX_ADDR_LEN];
203 #define NETDEV_HW_ADDR_T_LAN 1
204 #define NETDEV_HW_ADDR_T_SAN 2
205 #define NETDEV_HW_ADDR_T_SLAVE 3
206 #define NETDEV_HW_ADDR_T_UNICAST 4
207 #define NETDEV_HW_ADDR_T_MULTICAST 5
212 struct rcu_head rcu_head;
215 struct netdev_hw_addr_list {
216 struct list_head list;
220 #define netdev_hw_addr_list_count(l) ((l)->count)
221 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
222 #define netdev_hw_addr_list_for_each(ha, l) \
223 list_for_each_entry(ha, &(l)->list, list)
225 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
226 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
227 #define netdev_for_each_uc_addr(ha, dev) \
228 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
230 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
231 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
232 #define netdev_for_each_mc_addr(ha, dev) \
233 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
240 /* cached hardware header; allow for machine alignment needs. */
241 #define HH_DATA_MOD 16
242 #define HH_DATA_OFF(__len) \
243 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
244 #define HH_DATA_ALIGN(__len) \
245 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
246 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
249 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
251 * dev->hard_header_len ? (dev->hard_header_len +
252 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
254 * We could use other alignment values, but we must maintain the
255 * relationship HH alignment <= LL alignment.
257 #define LL_RESERVED_SPACE(dev) \
258 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
260 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
263 int (*create) (struct sk_buff *skb, struct net_device *dev,
264 unsigned short type, const void *daddr,
265 const void *saddr, unsigned int len);
266 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
267 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
268 void (*cache_update)(struct hh_cache *hh,
269 const struct net_device *dev,
270 const unsigned char *haddr);
273 /* These flag bits are private to the generic network queueing
274 * layer, they may not be explicitly referenced by any other
278 enum netdev_state_t {
280 __LINK_STATE_PRESENT,
281 __LINK_STATE_NOCARRIER,
282 __LINK_STATE_LINKWATCH_PENDING,
283 __LINK_STATE_DORMANT,
288 * This structure holds at boot time configured netdevice settings. They
289 * are then used in the device probing.
291 struct netdev_boot_setup {
295 #define NETDEV_BOOT_SETUP_MAX 8
297 int __init netdev_boot_setup(char *str);
300 * Structure for NAPI scheduling similar to tasklet but with weighting
303 /* The poll_list must only be managed by the entity which
304 * changes the state of the NAPI_STATE_SCHED bit. This means
305 * whoever atomically sets that bit can add this napi_struct
306 * to the per-cpu poll_list, and whoever clears that bit
307 * can remove from the list right before clearing the bit.
309 struct list_head poll_list;
313 unsigned int gro_count;
314 int (*poll)(struct napi_struct *, int);
315 #ifdef CONFIG_NETPOLL
316 spinlock_t poll_lock;
319 struct net_device *dev;
320 struct sk_buff *gro_list;
322 struct hrtimer timer;
323 struct list_head dev_list;
324 struct hlist_node napi_hash_node;
325 unsigned int napi_id;
329 NAPI_STATE_SCHED, /* Poll is scheduled */
330 NAPI_STATE_DISABLE, /* Disable pending */
331 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
332 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
333 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
343 typedef enum gro_result gro_result_t;
346 * enum rx_handler_result - Possible return values for rx_handlers.
347 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
349 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
350 * case skb->dev was changed by rx_handler.
351 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
352 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
354 * rx_handlers are functions called from inside __netif_receive_skb(), to do
355 * special processing of the skb, prior to delivery to protocol handlers.
357 * Currently, a net_device can only have a single rx_handler registered. Trying
358 * to register a second rx_handler will return -EBUSY.
360 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
361 * To unregister a rx_handler on a net_device, use
362 * netdev_rx_handler_unregister().
364 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
367 * If the rx_handler consumed to skb in some way, it should return
368 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
369 * the skb to be delivered in some other ways.
371 * If the rx_handler changed skb->dev, to divert the skb to another
372 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
373 * new device will be called if it exists.
375 * If the rx_handler consider the skb should be ignored, it should return
376 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
377 * are registered on exact device (ptype->dev == skb->dev).
379 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
380 * delivered, it should return RX_HANDLER_PASS.
382 * A device without a registered rx_handler will behave as if rx_handler
383 * returned RX_HANDLER_PASS.
386 enum rx_handler_result {
392 typedef enum rx_handler_result rx_handler_result_t;
393 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
395 void __napi_schedule(struct napi_struct *n);
396 void __napi_schedule_irqoff(struct napi_struct *n);
398 static inline bool napi_disable_pending(struct napi_struct *n)
400 return test_bit(NAPI_STATE_DISABLE, &n->state);
404 * napi_schedule_prep - check if napi can be scheduled
407 * Test if NAPI routine is already running, and if not mark
408 * it as running. This is used as a condition variable
409 * insure only one NAPI poll instance runs. We also make
410 * sure there is no pending NAPI disable.
412 static inline bool napi_schedule_prep(struct napi_struct *n)
414 return !napi_disable_pending(n) &&
415 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
419 * napi_schedule - schedule NAPI poll
422 * Schedule NAPI poll routine to be called if it is not already
425 static inline void napi_schedule(struct napi_struct *n)
427 if (napi_schedule_prep(n))
432 * napi_schedule_irqoff - schedule NAPI poll
435 * Variant of napi_schedule(), assuming hard irqs are masked.
437 static inline void napi_schedule_irqoff(struct napi_struct *n)
439 if (napi_schedule_prep(n))
440 __napi_schedule_irqoff(n);
443 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
444 static inline bool napi_reschedule(struct napi_struct *napi)
446 if (napi_schedule_prep(napi)) {
447 __napi_schedule(napi);
453 void __napi_complete(struct napi_struct *n);
454 void napi_complete_done(struct napi_struct *n, int work_done);
456 * napi_complete - NAPI processing complete
459 * Mark NAPI processing as complete.
460 * Consider using napi_complete_done() instead.
462 static inline void napi_complete(struct napi_struct *n)
464 return napi_complete_done(n, 0);
468 * napi_hash_add - add a NAPI to global hashtable
469 * @napi: napi context
471 * generate a new napi_id and store a @napi under it in napi_hash
472 * Used for busy polling (CONFIG_NET_RX_BUSY_POLL)
473 * Note: This is normally automatically done from netif_napi_add(),
474 * so might disappear in a future linux version.
476 void napi_hash_add(struct napi_struct *napi);
479 * napi_hash_del - remove a NAPI from global table
480 * @napi: napi context
482 * Warning: caller must observe rcu grace period
483 * before freeing memory containing @napi, if
484 * this function returns true.
485 * Note: core networking stack automatically calls it
486 * from netif_napi_del()
487 * Drivers might want to call this helper to combine all
488 * the needed rcu grace periods into a single one.
490 bool napi_hash_del(struct napi_struct *napi);
493 * napi_disable - prevent NAPI from scheduling
496 * Stop NAPI from being scheduled on this context.
497 * Waits till any outstanding processing completes.
499 void napi_disable(struct napi_struct *n);
502 * napi_enable - enable NAPI scheduling
505 * Resume NAPI from being scheduled on this context.
506 * Must be paired with napi_disable.
508 static inline void napi_enable(struct napi_struct *n)
510 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
511 smp_mb__before_atomic();
512 clear_bit(NAPI_STATE_SCHED, &n->state);
513 clear_bit(NAPI_STATE_NPSVC, &n->state);
517 * napi_synchronize - wait until NAPI is not running
520 * Wait until NAPI is done being scheduled on this context.
521 * Waits till any outstanding processing completes but
522 * does not disable future activations.
524 static inline void napi_synchronize(const struct napi_struct *n)
526 if (IS_ENABLED(CONFIG_SMP))
527 while (test_bit(NAPI_STATE_SCHED, &n->state))
533 enum netdev_queue_state_t {
534 __QUEUE_STATE_DRV_XOFF,
535 __QUEUE_STATE_STACK_XOFF,
536 __QUEUE_STATE_FROZEN,
539 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
540 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
541 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
543 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
544 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
546 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
550 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
551 * netif_tx_* functions below are used to manipulate this flag. The
552 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
553 * queue independently. The netif_xmit_*stopped functions below are called
554 * to check if the queue has been stopped by the driver or stack (either
555 * of the XOFF bits are set in the state). Drivers should not need to call
556 * netif_xmit*stopped functions, they should only be using netif_tx_*.
559 struct netdev_queue {
563 struct net_device *dev;
564 struct Qdisc __rcu *qdisc;
565 struct Qdisc *qdisc_sleeping;
569 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
575 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
578 * please use this field instead of dev->trans_start
580 unsigned long trans_start;
583 * Number of TX timeouts for this queue
584 * (/sys/class/net/DEV/Q/trans_timeout)
586 unsigned long trans_timeout;
593 unsigned long tx_maxrate;
594 } ____cacheline_aligned_in_smp;
596 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
598 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
605 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
607 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
614 * This structure holds an RPS map which can be of variable length. The
615 * map is an array of CPUs.
622 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
625 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
626 * tail pointer for that CPU's input queue at the time of last enqueue, and
627 * a hardware filter index.
629 struct rps_dev_flow {
632 unsigned int last_qtail;
634 #define RPS_NO_FILTER 0xffff
637 * The rps_dev_flow_table structure contains a table of flow mappings.
639 struct rps_dev_flow_table {
642 struct rps_dev_flow flows[0];
644 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
645 ((_num) * sizeof(struct rps_dev_flow)))
648 * The rps_sock_flow_table contains mappings of flows to the last CPU
649 * on which they were processed by the application (set in recvmsg).
650 * Each entry is a 32bit value. Upper part is the high order bits
651 * of flow hash, lower part is cpu number.
652 * rps_cpu_mask is used to partition the space, depending on number of
653 * possible cpus : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
654 * For example, if 64 cpus are possible, rps_cpu_mask = 0x3f,
655 * meaning we use 32-6=26 bits for the hash.
657 struct rps_sock_flow_table {
660 u32 ents[0] ____cacheline_aligned_in_smp;
662 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
664 #define RPS_NO_CPU 0xffff
666 extern u32 rps_cpu_mask;
667 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
669 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
673 unsigned int index = hash & table->mask;
674 u32 val = hash & ~rps_cpu_mask;
676 /* We only give a hint, preemption can change cpu under us */
677 val |= raw_smp_processor_id();
679 if (table->ents[index] != val)
680 table->ents[index] = val;
684 #ifdef CONFIG_RFS_ACCEL
685 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
688 #endif /* CONFIG_RPS */
690 /* This structure contains an instance of an RX queue. */
691 struct netdev_rx_queue {
693 struct rps_map __rcu *rps_map;
694 struct rps_dev_flow_table __rcu *rps_flow_table;
697 struct net_device *dev;
698 } ____cacheline_aligned_in_smp;
701 * RX queue sysfs structures and functions.
703 struct rx_queue_attribute {
704 struct attribute attr;
705 ssize_t (*show)(struct netdev_rx_queue *queue,
706 struct rx_queue_attribute *attr, char *buf);
707 ssize_t (*store)(struct netdev_rx_queue *queue,
708 struct rx_queue_attribute *attr, const char *buf, size_t len);
713 * This structure holds an XPS map which can be of variable length. The
714 * map is an array of queues.
718 unsigned int alloc_len;
722 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
723 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
724 - sizeof(struct xps_map)) / sizeof(u16))
727 * This structure holds all XPS maps for device. Maps are indexed by CPU.
729 struct xps_dev_maps {
731 struct xps_map __rcu *cpu_map[0];
733 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
734 (nr_cpu_ids * sizeof(struct xps_map *)))
735 #endif /* CONFIG_XPS */
737 #define TC_MAX_QUEUE 16
738 #define TC_BITMASK 15
739 /* HW offloaded queuing disciplines txq count and offset maps */
740 struct netdev_tc_txq {
745 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
747 * This structure is to hold information about the device
748 * configured to run FCoE protocol stack.
750 struct netdev_fcoe_hbainfo {
751 char manufacturer[64];
752 char serial_number[64];
753 char hardware_version[64];
754 char driver_version[64];
755 char optionrom_version[64];
756 char firmware_version[64];
758 char model_description[256];
762 #define MAX_PHYS_ITEM_ID_LEN 32
764 /* This structure holds a unique identifier to identify some
765 * physical item (port for example) used by a netdevice.
767 struct netdev_phys_item_id {
768 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
769 unsigned char id_len;
772 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
773 struct netdev_phys_item_id *b)
775 return a->id_len == b->id_len &&
776 memcmp(a->id, b->id, a->id_len) == 0;
779 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
780 struct sk_buff *skb);
783 * This structure defines the management hooks for network devices.
784 * The following hooks can be defined; unless noted otherwise, they are
785 * optional and can be filled with a null pointer.
787 * int (*ndo_init)(struct net_device *dev);
788 * This function is called once when network device is registered.
789 * The network device can use this to any late stage initializaton
790 * or semantic validattion. It can fail with an error code which will
791 * be propogated back to register_netdev
793 * void (*ndo_uninit)(struct net_device *dev);
794 * This function is called when device is unregistered or when registration
795 * fails. It is not called if init fails.
797 * int (*ndo_open)(struct net_device *dev);
798 * This function is called when network device transistions to the up
801 * int (*ndo_stop)(struct net_device *dev);
802 * This function is called when network device transistions to the down
805 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
806 * struct net_device *dev);
807 * Called when a packet needs to be transmitted.
808 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
809 * the queue before that can happen; it's for obsolete devices and weird
810 * corner cases, but the stack really does a non-trivial amount
811 * of useless work if you return NETDEV_TX_BUSY.
812 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
813 * Required can not be NULL.
815 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
816 * netdev_features_t features);
817 * Adjusts the requested feature flags according to device-specific
818 * constraints, and returns the resulting flags. Must not modify
821 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
822 * void *accel_priv, select_queue_fallback_t fallback);
823 * Called to decide which queue to when device supports multiple
826 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
827 * This function is called to allow device receiver to make
828 * changes to configuration when multicast or promiscious is enabled.
830 * void (*ndo_set_rx_mode)(struct net_device *dev);
831 * This function is called device changes address list filtering.
832 * If driver handles unicast address filtering, it should set
833 * IFF_UNICAST_FLT to its priv_flags.
835 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
836 * This function is called when the Media Access Control address
837 * needs to be changed. If this interface is not defined, the
838 * mac address can not be changed.
840 * int (*ndo_validate_addr)(struct net_device *dev);
841 * Test if Media Access Control address is valid for the device.
843 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
844 * Called when a user request an ioctl which can't be handled by
845 * the generic interface code. If not defined ioctl's return
846 * not supported error code.
848 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
849 * Used to set network devices bus interface parameters. This interface
850 * is retained for legacy reason, new devices should use the bus
851 * interface (PCI) for low level management.
853 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
854 * Called when a user wants to change the Maximum Transfer Unit
855 * of a device. If not defined, any request to change MTU will
856 * will return an error.
858 * void (*ndo_tx_timeout)(struct net_device *dev);
859 * Callback uses when the transmitter has not made any progress
860 * for dev->watchdog ticks.
862 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
863 * struct rtnl_link_stats64 *storage);
864 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
865 * Called when a user wants to get the network device usage
866 * statistics. Drivers must do one of the following:
867 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
868 * rtnl_link_stats64 structure passed by the caller.
869 * 2. Define @ndo_get_stats to update a net_device_stats structure
870 * (which should normally be dev->stats) and return a pointer to
871 * it. The structure may be changed asynchronously only if each
872 * field is written atomically.
873 * 3. Update dev->stats asynchronously and atomically, and define
876 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
877 * If device support VLAN filtering this function is called when a
878 * VLAN id is registered.
880 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
881 * If device support VLAN filtering this function is called when a
882 * VLAN id is unregistered.
884 * void (*ndo_poll_controller)(struct net_device *dev);
886 * SR-IOV management functions.
887 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
888 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
889 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
891 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
892 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
893 * int (*ndo_get_vf_config)(struct net_device *dev,
894 * int vf, struct ifla_vf_info *ivf);
895 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
896 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
897 * struct nlattr *port[]);
899 * Enable or disable the VF ability to query its RSS Redirection Table and
900 * Hash Key. This is needed since on some devices VF share this information
901 * with PF and querying it may adduce a theoretical security risk.
902 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
903 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
904 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
905 * Called to setup 'tc' number of traffic classes in the net device. This
906 * is always called from the stack with the rtnl lock held and netif tx
907 * queues stopped. This allows the netdevice to perform queue management
910 * Fiber Channel over Ethernet (FCoE) offload functions.
911 * int (*ndo_fcoe_enable)(struct net_device *dev);
912 * Called when the FCoE protocol stack wants to start using LLD for FCoE
913 * so the underlying device can perform whatever needed configuration or
914 * initialization to support acceleration of FCoE traffic.
916 * int (*ndo_fcoe_disable)(struct net_device *dev);
917 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
918 * so the underlying device can perform whatever needed clean-ups to
919 * stop supporting acceleration of FCoE traffic.
921 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
922 * struct scatterlist *sgl, unsigned int sgc);
923 * Called when the FCoE Initiator wants to initialize an I/O that
924 * is a possible candidate for Direct Data Placement (DDP). The LLD can
925 * perform necessary setup and returns 1 to indicate the device is set up
926 * successfully to perform DDP on this I/O, otherwise this returns 0.
928 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
929 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
930 * indicated by the FC exchange id 'xid', so the underlying device can
931 * clean up and reuse resources for later DDP requests.
933 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
934 * struct scatterlist *sgl, unsigned int sgc);
935 * Called when the FCoE Target wants to initialize an I/O that
936 * is a possible candidate for Direct Data Placement (DDP). The LLD can
937 * perform necessary setup and returns 1 to indicate the device is set up
938 * successfully to perform DDP on this I/O, otherwise this returns 0.
940 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
941 * struct netdev_fcoe_hbainfo *hbainfo);
942 * Called when the FCoE Protocol stack wants information on the underlying
943 * device. This information is utilized by the FCoE protocol stack to
944 * register attributes with Fiber Channel management service as per the
945 * FC-GS Fabric Device Management Information(FDMI) specification.
947 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
948 * Called when the underlying device wants to override default World Wide
949 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
950 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
951 * protocol stack to use.
954 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
955 * u16 rxq_index, u32 flow_id);
956 * Set hardware filter for RFS. rxq_index is the target queue index;
957 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
958 * Return the filter ID on success, or a negative error code.
960 * Slave management functions (for bridge, bonding, etc).
961 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
962 * Called to make another netdev an underling.
964 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
965 * Called to release previously enslaved netdev.
967 * Feature/offload setting functions.
968 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
969 * Called to update device configuration to new features. Passed
970 * feature set might be less than what was returned by ndo_fix_features()).
971 * Must return >0 or -errno if it changed dev->features itself.
973 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
974 * struct net_device *dev,
975 * const unsigned char *addr, u16 vid, u16 flags)
976 * Adds an FDB entry to dev for addr.
977 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
978 * struct net_device *dev,
979 * const unsigned char *addr, u16 vid)
980 * Deletes the FDB entry from dev coresponding to addr.
981 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
982 * struct net_device *dev, struct net_device *filter_dev,
984 * Used to add FDB entries to dump requests. Implementers should add
985 * entries to skb and update idx with the number of entries.
987 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
989 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
990 * struct net_device *dev, u32 filter_mask,
992 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
995 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
996 * Called to change device carrier. Soft-devices (like dummy, team, etc)
997 * which do not represent real hardware may define this to allow their
998 * userspace components to manage their virtual carrier state. Devices
999 * that determine carrier state from physical hardware properties (eg
1000 * network cables) or protocol-dependent mechanisms (eg
1001 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1003 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1004 * struct netdev_phys_item_id *ppid);
1005 * Called to get ID of physical port of this device. If driver does
1006 * not implement this, it is assumed that the hw is not able to have
1007 * multiple net devices on single physical port.
1009 * void (*ndo_add_vxlan_port)(struct net_device *dev,
1010 * sa_family_t sa_family, __be16 port);
1011 * Called by vxlan to notiy a driver about the UDP port and socket
1012 * address family that vxlan is listnening to. It is called only when
1013 * a new port starts listening. The operation is protected by the
1014 * vxlan_net->sock_lock.
1016 * void (*ndo_add_geneve_port)(struct net_device *dev,
1017 * sa_family_t sa_family, __be16 port);
1018 * Called by geneve to notify a driver about the UDP port and socket
1019 * address family that geneve is listnening to. It is called only when
1020 * a new port starts listening. The operation is protected by the
1021 * geneve_net->sock_lock.
1023 * void (*ndo_del_geneve_port)(struct net_device *dev,
1024 * sa_family_t sa_family, __be16 port);
1025 * Called by geneve to notify the driver about a UDP port and socket
1026 * address family that geneve is not listening to anymore. The operation
1027 * is protected by the geneve_net->sock_lock.
1029 * void (*ndo_del_vxlan_port)(struct net_device *dev,
1030 * sa_family_t sa_family, __be16 port);
1031 * Called by vxlan to notify the driver about a UDP port and socket
1032 * address family that vxlan is not listening to anymore. The operation
1033 * is protected by the vxlan_net->sock_lock.
1035 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1036 * struct net_device *dev)
1037 * Called by upper layer devices to accelerate switching or other
1038 * station functionality into hardware. 'pdev is the lowerdev
1039 * to use for the offload and 'dev' is the net device that will
1040 * back the offload. Returns a pointer to the private structure
1041 * the upper layer will maintain.
1042 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1043 * Called by upper layer device to delete the station created
1044 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1045 * the station and priv is the structure returned by the add
1047 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
1048 * struct net_device *dev,
1050 * Callback to use for xmit over the accelerated station. This
1051 * is used in place of ndo_start_xmit on accelerated net
1053 * netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
1054 * struct net_device *dev
1055 * netdev_features_t features);
1056 * Called by core transmit path to determine if device is capable of
1057 * performing offload operations on a given packet. This is to give
1058 * the device an opportunity to implement any restrictions that cannot
1059 * be otherwise expressed by feature flags. The check is called with
1060 * the set of features that the stack has calculated and it returns
1061 * those the driver believes to be appropriate.
1062 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1063 * int queue_index, u32 maxrate);
1064 * Called when a user wants to set a max-rate limitation of specific
1066 * int (*ndo_get_iflink)(const struct net_device *dev);
1067 * Called to get the iflink value of this device.
1068 * void (*ndo_change_proto_down)(struct net_device *dev,
1070 * This function is used to pass protocol port error state information
1071 * to the switch driver. The switch driver can react to the proto_down
1072 * by doing a phys down on the associated switch port.
1073 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1074 * This function is used to get egress tunnel information for given skb.
1075 * This is useful for retrieving outer tunnel header parameters while
1079 struct net_device_ops {
1080 int (*ndo_init)(struct net_device *dev);
1081 void (*ndo_uninit)(struct net_device *dev);
1082 int (*ndo_open)(struct net_device *dev);
1083 int (*ndo_stop)(struct net_device *dev);
1084 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1085 struct net_device *dev);
1086 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1087 struct net_device *dev,
1088 netdev_features_t features);
1089 u16 (*ndo_select_queue)(struct net_device *dev,
1090 struct sk_buff *skb,
1092 select_queue_fallback_t fallback);
1093 void (*ndo_change_rx_flags)(struct net_device *dev,
1095 void (*ndo_set_rx_mode)(struct net_device *dev);
1096 int (*ndo_set_mac_address)(struct net_device *dev,
1098 int (*ndo_validate_addr)(struct net_device *dev);
1099 int (*ndo_do_ioctl)(struct net_device *dev,
1100 struct ifreq *ifr, int cmd);
1101 int (*ndo_set_config)(struct net_device *dev,
1103 int (*ndo_change_mtu)(struct net_device *dev,
1105 int (*ndo_neigh_setup)(struct net_device *dev,
1106 struct neigh_parms *);
1107 void (*ndo_tx_timeout) (struct net_device *dev);
1109 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
1110 struct rtnl_link_stats64 *storage);
1111 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1113 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1114 __be16 proto, u16 vid);
1115 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1116 __be16 proto, u16 vid);
1117 #ifdef CONFIG_NET_POLL_CONTROLLER
1118 void (*ndo_poll_controller)(struct net_device *dev);
1119 int (*ndo_netpoll_setup)(struct net_device *dev,
1120 struct netpoll_info *info);
1121 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1123 #ifdef CONFIG_NET_RX_BUSY_POLL
1124 int (*ndo_busy_poll)(struct napi_struct *dev);
1126 int (*ndo_set_vf_mac)(struct net_device *dev,
1127 int queue, u8 *mac);
1128 int (*ndo_set_vf_vlan)(struct net_device *dev,
1129 int queue, u16 vlan, u8 qos);
1130 int (*ndo_set_vf_rate)(struct net_device *dev,
1131 int vf, int min_tx_rate,
1133 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1134 int vf, bool setting);
1135 int (*ndo_set_vf_trust)(struct net_device *dev,
1136 int vf, bool setting);
1137 int (*ndo_get_vf_config)(struct net_device *dev,
1139 struct ifla_vf_info *ivf);
1140 int (*ndo_set_vf_link_state)(struct net_device *dev,
1141 int vf, int link_state);
1142 int (*ndo_get_vf_stats)(struct net_device *dev,
1144 struct ifla_vf_stats
1146 int (*ndo_set_vf_port)(struct net_device *dev,
1148 struct nlattr *port[]);
1149 int (*ndo_get_vf_port)(struct net_device *dev,
1150 int vf, struct sk_buff *skb);
1151 int (*ndo_set_vf_rss_query_en)(
1152 struct net_device *dev,
1153 int vf, bool setting);
1154 int (*ndo_setup_tc)(struct net_device *dev, u32 handle, u8 tc);
1155 #if IS_ENABLED(CONFIG_FCOE)
1156 int (*ndo_fcoe_enable)(struct net_device *dev);
1157 int (*ndo_fcoe_disable)(struct net_device *dev);
1158 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1160 struct scatterlist *sgl,
1162 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1164 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1166 struct scatterlist *sgl,
1168 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1169 struct netdev_fcoe_hbainfo *hbainfo);
1172 #if IS_ENABLED(CONFIG_LIBFCOE)
1173 #define NETDEV_FCOE_WWNN 0
1174 #define NETDEV_FCOE_WWPN 1
1175 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1176 u64 *wwn, int type);
1179 #ifdef CONFIG_RFS_ACCEL
1180 int (*ndo_rx_flow_steer)(struct net_device *dev,
1181 const struct sk_buff *skb,
1185 int (*ndo_add_slave)(struct net_device *dev,
1186 struct net_device *slave_dev);
1187 int (*ndo_del_slave)(struct net_device *dev,
1188 struct net_device *slave_dev);
1189 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1190 netdev_features_t features);
1191 int (*ndo_set_features)(struct net_device *dev,
1192 netdev_features_t features);
1193 int (*ndo_neigh_construct)(struct neighbour *n);
1194 void (*ndo_neigh_destroy)(struct neighbour *n);
1196 int (*ndo_fdb_add)(struct ndmsg *ndm,
1197 struct nlattr *tb[],
1198 struct net_device *dev,
1199 const unsigned char *addr,
1202 int (*ndo_fdb_del)(struct ndmsg *ndm,
1203 struct nlattr *tb[],
1204 struct net_device *dev,
1205 const unsigned char *addr,
1207 int (*ndo_fdb_dump)(struct sk_buff *skb,
1208 struct netlink_callback *cb,
1209 struct net_device *dev,
1210 struct net_device *filter_dev,
1213 int (*ndo_bridge_setlink)(struct net_device *dev,
1214 struct nlmsghdr *nlh,
1216 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1218 struct net_device *dev,
1221 int (*ndo_bridge_dellink)(struct net_device *dev,
1222 struct nlmsghdr *nlh,
1224 int (*ndo_change_carrier)(struct net_device *dev,
1226 int (*ndo_get_phys_port_id)(struct net_device *dev,
1227 struct netdev_phys_item_id *ppid);
1228 int (*ndo_get_phys_port_name)(struct net_device *dev,
1229 char *name, size_t len);
1230 void (*ndo_add_vxlan_port)(struct net_device *dev,
1231 sa_family_t sa_family,
1233 void (*ndo_del_vxlan_port)(struct net_device *dev,
1234 sa_family_t sa_family,
1236 void (*ndo_add_geneve_port)(struct net_device *dev,
1237 sa_family_t sa_family,
1239 void (*ndo_del_geneve_port)(struct net_device *dev,
1240 sa_family_t sa_family,
1242 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1243 struct net_device *dev);
1244 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1247 netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb,
1248 struct net_device *dev,
1250 int (*ndo_get_lock_subclass)(struct net_device *dev);
1251 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1254 int (*ndo_get_iflink)(const struct net_device *dev);
1255 int (*ndo_change_proto_down)(struct net_device *dev,
1257 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1258 struct sk_buff *skb);
1262 * enum net_device_priv_flags - &struct net_device priv_flags
1264 * These are the &struct net_device, they are only set internally
1265 * by drivers and used in the kernel. These flags are invisible to
1266 * userspace, this means that the order of these flags can change
1267 * during any kernel release.
1269 * You should have a pretty good reason to be extending these flags.
1271 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1272 * @IFF_EBRIDGE: Ethernet bridging device
1273 * @IFF_BONDING: bonding master or slave
1274 * @IFF_ISATAP: ISATAP interface (RFC4214)
1275 * @IFF_WAN_HDLC: WAN HDLC device
1276 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1278 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1279 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1280 * @IFF_MACVLAN_PORT: device used as macvlan port
1281 * @IFF_BRIDGE_PORT: device used as bridge port
1282 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1283 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1284 * @IFF_UNICAST_FLT: Supports unicast filtering
1285 * @IFF_TEAM_PORT: device used as team port
1286 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1287 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1288 * change when it's running
1289 * @IFF_MACVLAN: Macvlan device
1290 * @IFF_L3MDEV_MASTER: device is an L3 master device
1291 * @IFF_NO_QUEUE: device can run without qdisc attached
1292 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1293 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1294 * @IFF_TEAM: device is a team device
1295 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1297 enum netdev_priv_flags {
1298 IFF_802_1Q_VLAN = 1<<0,
1302 IFF_WAN_HDLC = 1<<4,
1303 IFF_XMIT_DST_RELEASE = 1<<5,
1304 IFF_DONT_BRIDGE = 1<<6,
1305 IFF_DISABLE_NETPOLL = 1<<7,
1306 IFF_MACVLAN_PORT = 1<<8,
1307 IFF_BRIDGE_PORT = 1<<9,
1308 IFF_OVS_DATAPATH = 1<<10,
1309 IFF_TX_SKB_SHARING = 1<<11,
1310 IFF_UNICAST_FLT = 1<<12,
1311 IFF_TEAM_PORT = 1<<13,
1312 IFF_SUPP_NOFCS = 1<<14,
1313 IFF_LIVE_ADDR_CHANGE = 1<<15,
1314 IFF_MACVLAN = 1<<16,
1315 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1316 IFF_IPVLAN_MASTER = 1<<18,
1317 IFF_IPVLAN_SLAVE = 1<<19,
1318 IFF_L3MDEV_MASTER = 1<<20,
1319 IFF_NO_QUEUE = 1<<21,
1320 IFF_OPENVSWITCH = 1<<22,
1321 IFF_L3MDEV_SLAVE = 1<<23,
1323 IFF_RXFH_CONFIGURED = 1<<25,
1326 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1327 #define IFF_EBRIDGE IFF_EBRIDGE
1328 #define IFF_BONDING IFF_BONDING
1329 #define IFF_ISATAP IFF_ISATAP
1330 #define IFF_WAN_HDLC IFF_WAN_HDLC
1331 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1332 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1333 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1334 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1335 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1336 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1337 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1338 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1339 #define IFF_TEAM_PORT IFF_TEAM_PORT
1340 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1341 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1342 #define IFF_MACVLAN IFF_MACVLAN
1343 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1344 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1345 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1346 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1347 #define IFF_NO_QUEUE IFF_NO_QUEUE
1348 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1349 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1350 #define IFF_TEAM IFF_TEAM
1351 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1354 * struct net_device - The DEVICE structure.
1355 * Actually, this whole structure is a big mistake. It mixes I/O
1356 * data with strictly "high-level" data, and it has to know about
1357 * almost every data structure used in the INET module.
1359 * @name: This is the first field of the "visible" part of this structure
1360 * (i.e. as seen by users in the "Space.c" file). It is the name
1363 * @name_hlist: Device name hash chain, please keep it close to name[]
1364 * @ifalias: SNMP alias
1365 * @mem_end: Shared memory end
1366 * @mem_start: Shared memory start
1367 * @base_addr: Device I/O address
1368 * @irq: Device IRQ number
1370 * @carrier_changes: Stats to monitor carrier on<->off transitions
1372 * @state: Generic network queuing layer state, see netdev_state_t
1373 * @dev_list: The global list of network devices
1374 * @napi_list: List entry, that is used for polling napi devices
1375 * @unreg_list: List entry, that is used, when we are unregistering the
1376 * device, see the function unregister_netdev
1377 * @close_list: List entry, that is used, when we are closing the device
1379 * @adj_list: Directly linked devices, like slaves for bonding
1380 * @all_adj_list: All linked devices, *including* neighbours
1381 * @features: Currently active device features
1382 * @hw_features: User-changeable features
1384 * @wanted_features: User-requested features
1385 * @vlan_features: Mask of features inheritable by VLAN devices
1387 * @hw_enc_features: Mask of features inherited by encapsulating devices
1388 * This field indicates what encapsulation
1389 * offloads the hardware is capable of doing,
1390 * and drivers will need to set them appropriately.
1392 * @mpls_features: Mask of features inheritable by MPLS
1394 * @ifindex: interface index
1395 * @group: The group, that the device belongs to
1397 * @stats: Statistics struct, which was left as a legacy, use
1398 * rtnl_link_stats64 instead
1400 * @rx_dropped: Dropped packets by core network,
1401 * do not use this in drivers
1402 * @tx_dropped: Dropped packets by core network,
1403 * do not use this in drivers
1404 * @rx_nohandler: nohandler dropped packets by core network on
1405 * inactive devices, do not use this in drivers
1407 * @wireless_handlers: List of functions to handle Wireless Extensions,
1409 * see <net/iw_handler.h> for details.
1410 * @wireless_data: Instance data managed by the core of wireless extensions
1412 * @netdev_ops: Includes several pointers to callbacks,
1413 * if one wants to override the ndo_*() functions
1414 * @ethtool_ops: Management operations
1415 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1416 * of Layer 2 headers.
1418 * @flags: Interface flags (a la BSD)
1419 * @priv_flags: Like 'flags' but invisible to userspace,
1420 * see if.h for the definitions
1421 * @gflags: Global flags ( kept as legacy )
1422 * @padded: How much padding added by alloc_netdev()
1423 * @operstate: RFC2863 operstate
1424 * @link_mode: Mapping policy to operstate
1425 * @if_port: Selectable AUI, TP, ...
1427 * @mtu: Interface MTU value
1428 * @type: Interface hardware type
1429 * @hard_header_len: Hardware header length, which means that this is the
1430 * minimum size of a packet.
1432 * @needed_headroom: Extra headroom the hardware may need, but not in all
1433 * cases can this be guaranteed
1434 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1435 * cases can this be guaranteed. Some cases also use
1436 * LL_MAX_HEADER instead to allocate the skb
1438 * interface address info:
1440 * @perm_addr: Permanent hw address
1441 * @addr_assign_type: Hw address assignment type
1442 * @addr_len: Hardware address length
1443 * @neigh_priv_len; Used in neigh_alloc(),
1444 * initialized only in atm/clip.c
1445 * @dev_id: Used to differentiate devices that share
1446 * the same link layer address
1447 * @dev_port: Used to differentiate devices that share
1449 * @addr_list_lock: XXX: need comments on this one
1450 * @uc_promisc: Counter, that indicates, that promiscuous mode
1451 * has been enabled due to the need to listen to
1452 * additional unicast addresses in a device that
1453 * does not implement ndo_set_rx_mode()
1454 * @uc: unicast mac addresses
1455 * @mc: multicast mac addresses
1456 * @dev_addrs: list of device hw addresses
1457 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1458 * @promiscuity: Number of times, the NIC is told to work in
1459 * Promiscuous mode, if it becomes 0 the NIC will
1460 * exit from working in Promiscuous mode
1461 * @allmulti: Counter, enables or disables allmulticast mode
1463 * @vlan_info: VLAN info
1464 * @dsa_ptr: dsa specific data
1465 * @tipc_ptr: TIPC specific data
1466 * @atalk_ptr: AppleTalk link
1467 * @ip_ptr: IPv4 specific data
1468 * @dn_ptr: DECnet specific data
1469 * @ip6_ptr: IPv6 specific data
1470 * @ax25_ptr: AX.25 specific data
1471 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1473 * @last_rx: Time of last Rx
1474 * @dev_addr: Hw address (before bcast,
1475 * because most packets are unicast)
1477 * @_rx: Array of RX queues
1478 * @num_rx_queues: Number of RX queues
1479 * allocated at register_netdev() time
1480 * @real_num_rx_queues: Number of RX queues currently active in device
1482 * @rx_handler: handler for received packets
1483 * @rx_handler_data: XXX: need comments on this one
1484 * @ingress_queue: XXX: need comments on this one
1485 * @broadcast: hw bcast address
1487 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1488 * indexed by RX queue number. Assigned by driver.
1489 * This must only be set if the ndo_rx_flow_steer
1490 * operation is defined
1491 * @index_hlist: Device index hash chain
1493 * @_tx: Array of TX queues
1494 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1495 * @real_num_tx_queues: Number of TX queues currently active in device
1496 * @qdisc: Root qdisc from userspace point of view
1497 * @tx_queue_len: Max frames per queue allowed
1498 * @tx_global_lock: XXX: need comments on this one
1500 * @xps_maps: XXX: need comments on this one
1502 * @offload_fwd_mark: Offload device fwding mark
1504 * @trans_start: Time (in jiffies) of last Tx
1505 * @watchdog_timeo: Represents the timeout that is used by
1506 * the watchdog ( see dev_watchdog() )
1507 * @watchdog_timer: List of timers
1509 * @pcpu_refcnt: Number of references to this device
1510 * @todo_list: Delayed register/unregister
1511 * @link_watch_list: XXX: need comments on this one
1513 * @reg_state: Register/unregister state machine
1514 * @dismantle: Device is going to be freed
1515 * @rtnl_link_state: This enum represents the phases of creating
1518 * @destructor: Called from unregister,
1519 * can be used to call free_netdev
1520 * @npinfo: XXX: need comments on this one
1521 * @nd_net: Network namespace this network device is inside
1523 * @ml_priv: Mid-layer private
1524 * @lstats: Loopback statistics
1525 * @tstats: Tunnel statistics
1526 * @dstats: Dummy statistics
1527 * @vstats: Virtual ethernet statistics
1532 * @dev: Class/net/name entry
1533 * @sysfs_groups: Space for optional device, statistics and wireless
1536 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1537 * @rtnl_link_ops: Rtnl_link_ops
1539 * @gso_max_size: Maximum size of generic segmentation offload
1540 * @gso_max_segs: Maximum number of segments that can be passed to the
1542 * @gso_min_segs: Minimum number of segments that can be passed to the
1545 * @dcbnl_ops: Data Center Bridging netlink ops
1546 * @num_tc: Number of traffic classes in the net device
1547 * @tc_to_txq: XXX: need comments on this one
1548 * @prio_tc_map XXX: need comments on this one
1550 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1552 * @priomap: XXX: need comments on this one
1553 * @phydev: Physical device may attach itself
1554 * for hardware timestamping
1556 * @qdisc_tx_busylock: XXX: need comments on this one
1558 * @proto_down: protocol port state information can be sent to the
1559 * switch driver and used to set the phys state of the
1562 * FIXME: cleanup struct net_device such that network protocol info
1567 char name[IFNAMSIZ];
1568 struct hlist_node name_hlist;
1571 * I/O specific fields
1572 * FIXME: Merge these and struct ifmap into one
1574 unsigned long mem_end;
1575 unsigned long mem_start;
1576 unsigned long base_addr;
1579 atomic_t carrier_changes;
1582 * Some hardware also needs these fields (state,dev_list,
1583 * napi_list,unreg_list,close_list) but they are not
1584 * part of the usual set specified in Space.c.
1587 unsigned long state;
1589 struct list_head dev_list;
1590 struct list_head napi_list;
1591 struct list_head unreg_list;
1592 struct list_head close_list;
1593 struct list_head ptype_all;
1594 struct list_head ptype_specific;
1597 struct list_head upper;
1598 struct list_head lower;
1602 struct list_head upper;
1603 struct list_head lower;
1606 netdev_features_t features;
1607 netdev_features_t hw_features;
1608 netdev_features_t wanted_features;
1609 netdev_features_t vlan_features;
1610 netdev_features_t hw_enc_features;
1611 netdev_features_t mpls_features;
1616 struct net_device_stats stats;
1618 atomic_long_t rx_dropped;
1619 atomic_long_t tx_dropped;
1620 atomic_long_t rx_nohandler;
1622 #ifdef CONFIG_WIRELESS_EXT
1623 const struct iw_handler_def * wireless_handlers;
1624 struct iw_public_data * wireless_data;
1626 const struct net_device_ops *netdev_ops;
1627 const struct ethtool_ops *ethtool_ops;
1628 #ifdef CONFIG_NET_SWITCHDEV
1629 const struct switchdev_ops *switchdev_ops;
1631 #ifdef CONFIG_NET_L3_MASTER_DEV
1632 const struct l3mdev_ops *l3mdev_ops;
1635 const struct header_ops *header_ops;
1638 unsigned int priv_flags;
1640 unsigned short gflags;
1641 unsigned short padded;
1643 unsigned char operstate;
1644 unsigned char link_mode;
1646 unsigned char if_port;
1650 unsigned short type;
1651 unsigned short hard_header_len;
1653 unsigned short needed_headroom;
1654 unsigned short needed_tailroom;
1656 /* Interface address info. */
1657 unsigned char perm_addr[MAX_ADDR_LEN];
1658 unsigned char addr_assign_type;
1659 unsigned char addr_len;
1660 unsigned short neigh_priv_len;
1661 unsigned short dev_id;
1662 unsigned short dev_port;
1663 spinlock_t addr_list_lock;
1664 unsigned char name_assign_type;
1666 struct netdev_hw_addr_list uc;
1667 struct netdev_hw_addr_list mc;
1668 struct netdev_hw_addr_list dev_addrs;
1671 struct kset *queues_kset;
1673 unsigned int promiscuity;
1674 unsigned int allmulti;
1677 /* Protocol specific pointers */
1679 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1680 struct vlan_info __rcu *vlan_info;
1682 #if IS_ENABLED(CONFIG_NET_DSA)
1683 struct dsa_switch_tree *dsa_ptr;
1685 #if IS_ENABLED(CONFIG_TIPC)
1686 struct tipc_bearer __rcu *tipc_ptr;
1689 struct in_device __rcu *ip_ptr;
1690 struct dn_dev __rcu *dn_ptr;
1691 struct inet6_dev __rcu *ip6_ptr;
1693 struct wireless_dev *ieee80211_ptr;
1694 struct wpan_dev *ieee802154_ptr;
1695 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1696 struct mpls_dev __rcu *mpls_ptr;
1700 * Cache lines mostly used on receive path (including eth_type_trans())
1702 unsigned long last_rx;
1704 /* Interface address info used in eth_type_trans() */
1705 unsigned char *dev_addr;
1709 struct netdev_rx_queue *_rx;
1711 unsigned int num_rx_queues;
1712 unsigned int real_num_rx_queues;
1716 unsigned long gro_flush_timeout;
1717 rx_handler_func_t __rcu *rx_handler;
1718 void __rcu *rx_handler_data;
1720 #ifdef CONFIG_NET_CLS_ACT
1721 struct tcf_proto __rcu *ingress_cl_list;
1723 struct netdev_queue __rcu *ingress_queue;
1724 #ifdef CONFIG_NETFILTER_INGRESS
1725 struct list_head nf_hooks_ingress;
1728 unsigned char broadcast[MAX_ADDR_LEN];
1729 #ifdef CONFIG_RFS_ACCEL
1730 struct cpu_rmap *rx_cpu_rmap;
1732 struct hlist_node index_hlist;
1735 * Cache lines mostly used on transmit path
1737 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1738 unsigned int num_tx_queues;
1739 unsigned int real_num_tx_queues;
1740 struct Qdisc *qdisc;
1741 unsigned long tx_queue_len;
1742 spinlock_t tx_global_lock;
1746 struct xps_dev_maps __rcu *xps_maps;
1748 #ifdef CONFIG_NET_CLS_ACT
1749 struct tcf_proto __rcu *egress_cl_list;
1751 #ifdef CONFIG_NET_SWITCHDEV
1752 u32 offload_fwd_mark;
1755 /* These may be needed for future network-power-down code. */
1758 * trans_start here is expensive for high speed devices on SMP,
1759 * please use netdev_queue->trans_start instead.
1761 unsigned long trans_start;
1763 struct timer_list watchdog_timer;
1765 int __percpu *pcpu_refcnt;
1766 struct list_head todo_list;
1768 struct list_head link_watch_list;
1770 enum { NETREG_UNINITIALIZED=0,
1771 NETREG_REGISTERED, /* completed register_netdevice */
1772 NETREG_UNREGISTERING, /* called unregister_netdevice */
1773 NETREG_UNREGISTERED, /* completed unregister todo */
1774 NETREG_RELEASED, /* called free_netdev */
1775 NETREG_DUMMY, /* dummy device for NAPI poll */
1781 RTNL_LINK_INITIALIZED,
1782 RTNL_LINK_INITIALIZING,
1783 } rtnl_link_state:16;
1785 void (*destructor)(struct net_device *dev);
1787 #ifdef CONFIG_NETPOLL
1788 struct netpoll_info __rcu *npinfo;
1791 possible_net_t nd_net;
1793 /* mid-layer private */
1796 struct pcpu_lstats __percpu *lstats;
1797 struct pcpu_sw_netstats __percpu *tstats;
1798 struct pcpu_dstats __percpu *dstats;
1799 struct pcpu_vstats __percpu *vstats;
1802 struct garp_port __rcu *garp_port;
1803 struct mrp_port __rcu *mrp_port;
1806 const struct attribute_group *sysfs_groups[4];
1807 const struct attribute_group *sysfs_rx_queue_group;
1809 const struct rtnl_link_ops *rtnl_link_ops;
1811 /* for setting kernel sock attribute on TCP connection setup */
1812 #define GSO_MAX_SIZE 65536
1813 unsigned int gso_max_size;
1814 #define GSO_MAX_SEGS 65535
1818 const struct dcbnl_rtnl_ops *dcbnl_ops;
1821 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1822 u8 prio_tc_map[TC_BITMASK + 1];
1824 #if IS_ENABLED(CONFIG_FCOE)
1825 unsigned int fcoe_ddp_xid;
1827 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1828 struct netprio_map __rcu *priomap;
1830 struct phy_device *phydev;
1831 struct lock_class_key *qdisc_tx_busylock;
1834 #define to_net_dev(d) container_of(d, struct net_device, dev)
1836 #define NETDEV_ALIGN 32
1839 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1841 return dev->prio_tc_map[prio & TC_BITMASK];
1845 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1847 if (tc >= dev->num_tc)
1850 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1855 void netdev_reset_tc(struct net_device *dev)
1858 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1859 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1863 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1865 if (tc >= dev->num_tc)
1868 dev->tc_to_txq[tc].count = count;
1869 dev->tc_to_txq[tc].offset = offset;
1874 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1876 if (num_tc > TC_MAX_QUEUE)
1879 dev->num_tc = num_tc;
1884 int netdev_get_num_tc(struct net_device *dev)
1890 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1893 return &dev->_tx[index];
1896 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
1897 const struct sk_buff *skb)
1899 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
1902 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1903 void (*f)(struct net_device *,
1904 struct netdev_queue *,
1910 for (i = 0; i < dev->num_tx_queues; i++)
1911 f(dev, &dev->_tx[i], arg);
1914 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1915 struct sk_buff *skb,
1919 * Net namespace inlines
1922 struct net *dev_net(const struct net_device *dev)
1924 return read_pnet(&dev->nd_net);
1928 void dev_net_set(struct net_device *dev, struct net *net)
1930 write_pnet(&dev->nd_net, net);
1933 static inline bool netdev_uses_dsa(struct net_device *dev)
1935 #if IS_ENABLED(CONFIG_NET_DSA)
1936 if (dev->dsa_ptr != NULL)
1937 return dsa_uses_tagged_protocol(dev->dsa_ptr);
1943 * netdev_priv - access network device private data
1944 * @dev: network device
1946 * Get network device private data
1948 static inline void *netdev_priv(const struct net_device *dev)
1950 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1953 /* Set the sysfs physical device reference for the network logical device
1954 * if set prior to registration will cause a symlink during initialization.
1956 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1958 /* Set the sysfs device type for the network logical device to allow
1959 * fine-grained identification of different network device types. For
1960 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1962 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1964 /* Default NAPI poll() weight
1965 * Device drivers are strongly advised to not use bigger value
1967 #define NAPI_POLL_WEIGHT 64
1970 * netif_napi_add - initialize a napi context
1971 * @dev: network device
1972 * @napi: napi context
1973 * @poll: polling function
1974 * @weight: default weight
1976 * netif_napi_add() must be used to initialize a napi context prior to calling
1977 * *any* of the other napi related functions.
1979 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1980 int (*poll)(struct napi_struct *, int), int weight);
1983 * netif_tx_napi_add - initialize a napi context
1984 * @dev: network device
1985 * @napi: napi context
1986 * @poll: polling function
1987 * @weight: default weight
1989 * This variant of netif_napi_add() should be used from drivers using NAPI
1990 * to exclusively poll a TX queue.
1991 * This will avoid we add it into napi_hash[], thus polluting this hash table.
1993 static inline void netif_tx_napi_add(struct net_device *dev,
1994 struct napi_struct *napi,
1995 int (*poll)(struct napi_struct *, int),
1998 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
1999 netif_napi_add(dev, napi, poll, weight);
2003 * netif_napi_del - remove a napi context
2004 * @napi: napi context
2006 * netif_napi_del() removes a napi context from the network device napi list
2008 void netif_napi_del(struct napi_struct *napi);
2010 struct napi_gro_cb {
2011 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2014 /* Length of frag0. */
2015 unsigned int frag0_len;
2017 /* This indicates where we are processing relative to skb->data. */
2020 /* This is non-zero if the packet cannot be merged with the new skb. */
2023 /* Save the IP ID here and check when we get to the transport layer */
2026 /* Number of segments aggregated. */
2029 /* Start offset for remote checksum offload */
2030 u16 gro_remcsum_start;
2032 /* jiffies when first packet was created/queued */
2035 /* Used in ipv6_gro_receive() and foo-over-udp */
2038 /* This is non-zero if the packet may be of the same flow. */
2041 /* Used in udp_gro_receive */
2044 /* GRO checksum is valid */
2047 /* Number of checksums via CHECKSUM_UNNECESSARY */
2052 #define NAPI_GRO_FREE 1
2053 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2055 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2060 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2063 /* used in skb_gro_receive() slow path */
2064 struct sk_buff *last;
2067 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2069 struct packet_type {
2070 __be16 type; /* This is really htons(ether_type). */
2071 struct net_device *dev; /* NULL is wildcarded here */
2072 int (*func) (struct sk_buff *,
2073 struct net_device *,
2074 struct packet_type *,
2075 struct net_device *);
2076 bool (*id_match)(struct packet_type *ptype,
2078 void *af_packet_priv;
2079 struct list_head list;
2082 struct offload_callbacks {
2083 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2084 netdev_features_t features);
2085 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2086 struct sk_buff *skb);
2087 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2090 struct packet_offload {
2091 __be16 type; /* This is really htons(ether_type). */
2093 struct offload_callbacks callbacks;
2094 struct list_head list;
2099 struct udp_offload_callbacks {
2100 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2101 struct sk_buff *skb,
2102 struct udp_offload *uoff);
2103 int (*gro_complete)(struct sk_buff *skb,
2105 struct udp_offload *uoff);
2108 struct udp_offload {
2111 struct udp_offload_callbacks callbacks;
2114 /* often modified stats are per cpu, other are shared (netdev->stats) */
2115 struct pcpu_sw_netstats {
2120 struct u64_stats_sync syncp;
2123 #define __netdev_alloc_pcpu_stats(type, gfp) \
2125 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2128 for_each_possible_cpu(__cpu) { \
2129 typeof(type) *stat; \
2130 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2131 u64_stats_init(&stat->syncp); \
2137 #define netdev_alloc_pcpu_stats(type) \
2138 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2140 enum netdev_lag_tx_type {
2141 NETDEV_LAG_TX_TYPE_UNKNOWN,
2142 NETDEV_LAG_TX_TYPE_RANDOM,
2143 NETDEV_LAG_TX_TYPE_BROADCAST,
2144 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2145 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2146 NETDEV_LAG_TX_TYPE_HASH,
2149 struct netdev_lag_upper_info {
2150 enum netdev_lag_tx_type tx_type;
2153 struct netdev_lag_lower_state_info {
2158 #include <linux/notifier.h>
2160 /* netdevice notifier chain. Please remember to update the rtnetlink
2161 * notification exclusion list in rtnetlink_event() when adding new
2164 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2165 #define NETDEV_DOWN 0x0002
2166 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2167 detected a hardware crash and restarted
2168 - we can use this eg to kick tcp sessions
2170 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2171 #define NETDEV_REGISTER 0x0005
2172 #define NETDEV_UNREGISTER 0x0006
2173 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2174 #define NETDEV_CHANGEADDR 0x0008
2175 #define NETDEV_GOING_DOWN 0x0009
2176 #define NETDEV_CHANGENAME 0x000A
2177 #define NETDEV_FEAT_CHANGE 0x000B
2178 #define NETDEV_BONDING_FAILOVER 0x000C
2179 #define NETDEV_PRE_UP 0x000D
2180 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2181 #define NETDEV_POST_TYPE_CHANGE 0x000F
2182 #define NETDEV_POST_INIT 0x0010
2183 #define NETDEV_UNREGISTER_FINAL 0x0011
2184 #define NETDEV_RELEASE 0x0012
2185 #define NETDEV_NOTIFY_PEERS 0x0013
2186 #define NETDEV_JOIN 0x0014
2187 #define NETDEV_CHANGEUPPER 0x0015
2188 #define NETDEV_RESEND_IGMP 0x0016
2189 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2190 #define NETDEV_CHANGEINFODATA 0x0018
2191 #define NETDEV_BONDING_INFO 0x0019
2192 #define NETDEV_PRECHANGEUPPER 0x001A
2193 #define NETDEV_CHANGELOWERSTATE 0x001B
2195 int register_netdevice_notifier(struct notifier_block *nb);
2196 int unregister_netdevice_notifier(struct notifier_block *nb);
2198 struct netdev_notifier_info {
2199 struct net_device *dev;
2202 struct netdev_notifier_change_info {
2203 struct netdev_notifier_info info; /* must be first */
2204 unsigned int flags_changed;
2207 struct netdev_notifier_changeupper_info {
2208 struct netdev_notifier_info info; /* must be first */
2209 struct net_device *upper_dev; /* new upper dev */
2210 bool master; /* is upper dev master */
2211 bool linking; /* is the nofication for link or unlink */
2212 void *upper_info; /* upper dev info */
2215 struct netdev_notifier_changelowerstate_info {
2216 struct netdev_notifier_info info; /* must be first */
2217 void *lower_state_info; /* is lower dev state */
2220 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2221 struct net_device *dev)
2226 static inline struct net_device *
2227 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2232 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2235 extern rwlock_t dev_base_lock; /* Device list lock */
2237 #define for_each_netdev(net, d) \
2238 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2239 #define for_each_netdev_reverse(net, d) \
2240 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2241 #define for_each_netdev_rcu(net, d) \
2242 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2243 #define for_each_netdev_safe(net, d, n) \
2244 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2245 #define for_each_netdev_continue(net, d) \
2246 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2247 #define for_each_netdev_continue_rcu(net, d) \
2248 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2249 #define for_each_netdev_in_bond_rcu(bond, slave) \
2250 for_each_netdev_rcu(&init_net, slave) \
2251 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2252 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2254 static inline struct net_device *next_net_device(struct net_device *dev)
2256 struct list_head *lh;
2260 lh = dev->dev_list.next;
2261 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2264 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2266 struct list_head *lh;
2270 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2271 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2274 static inline struct net_device *first_net_device(struct net *net)
2276 return list_empty(&net->dev_base_head) ? NULL :
2277 net_device_entry(net->dev_base_head.next);
2280 static inline struct net_device *first_net_device_rcu(struct net *net)
2282 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2284 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2287 int netdev_boot_setup_check(struct net_device *dev);
2288 unsigned long netdev_boot_base(const char *prefix, int unit);
2289 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2290 const char *hwaddr);
2291 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2292 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2293 void dev_add_pack(struct packet_type *pt);
2294 void dev_remove_pack(struct packet_type *pt);
2295 void __dev_remove_pack(struct packet_type *pt);
2296 void dev_add_offload(struct packet_offload *po);
2297 void dev_remove_offload(struct packet_offload *po);
2299 int dev_get_iflink(const struct net_device *dev);
2300 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2301 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2302 unsigned short mask);
2303 struct net_device *dev_get_by_name(struct net *net, const char *name);
2304 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2305 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2306 int dev_alloc_name(struct net_device *dev, const char *name);
2307 int dev_open(struct net_device *dev);
2308 int dev_close(struct net_device *dev);
2309 int dev_close_many(struct list_head *head, bool unlink);
2310 void dev_disable_lro(struct net_device *dev);
2311 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2312 int dev_queue_xmit(struct sk_buff *skb);
2313 int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2314 int register_netdevice(struct net_device *dev);
2315 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2316 void unregister_netdevice_many(struct list_head *head);
2317 static inline void unregister_netdevice(struct net_device *dev)
2319 unregister_netdevice_queue(dev, NULL);
2322 int netdev_refcnt_read(const struct net_device *dev);
2323 void free_netdev(struct net_device *dev);
2324 void netdev_freemem(struct net_device *dev);
2325 void synchronize_net(void);
2326 int init_dummy_netdev(struct net_device *dev);
2328 DECLARE_PER_CPU(int, xmit_recursion);
2329 static inline int dev_recursion_level(void)
2331 return this_cpu_read(xmit_recursion);
2334 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2335 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2336 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2337 int netdev_get_name(struct net *net, char *name, int ifindex);
2338 int dev_restart(struct net_device *dev);
2339 int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2341 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2343 return NAPI_GRO_CB(skb)->data_offset;
2346 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2348 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2351 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2353 NAPI_GRO_CB(skb)->data_offset += len;
2356 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2357 unsigned int offset)
2359 return NAPI_GRO_CB(skb)->frag0 + offset;
2362 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2364 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2367 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2368 unsigned int offset)
2370 if (!pskb_may_pull(skb, hlen))
2373 NAPI_GRO_CB(skb)->frag0 = NULL;
2374 NAPI_GRO_CB(skb)->frag0_len = 0;
2375 return skb->data + offset;
2378 static inline void *skb_gro_network_header(struct sk_buff *skb)
2380 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2381 skb_network_offset(skb);
2384 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2385 const void *start, unsigned int len)
2387 if (NAPI_GRO_CB(skb)->csum_valid)
2388 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2389 csum_partial(start, len, 0));
2392 /* GRO checksum functions. These are logical equivalents of the normal
2393 * checksum functions (in skbuff.h) except that they operate on the GRO
2394 * offsets and fields in sk_buff.
2397 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2399 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2401 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2404 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2408 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2409 skb_checksum_start_offset(skb) <
2410 skb_gro_offset(skb)) &&
2411 !skb_at_gro_remcsum_start(skb) &&
2412 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2413 (!zero_okay || check));
2416 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2419 if (NAPI_GRO_CB(skb)->csum_valid &&
2420 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2423 NAPI_GRO_CB(skb)->csum = psum;
2425 return __skb_gro_checksum_complete(skb);
2428 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2430 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2431 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2432 NAPI_GRO_CB(skb)->csum_cnt--;
2434 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2435 * verified a new top level checksum or an encapsulated one
2436 * during GRO. This saves work if we fallback to normal path.
2438 __skb_incr_checksum_unnecessary(skb);
2442 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2445 __sum16 __ret = 0; \
2446 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2447 __ret = __skb_gro_checksum_validate_complete(skb, \
2448 compute_pseudo(skb, proto)); \
2450 __skb_mark_checksum_bad(skb); \
2452 skb_gro_incr_csum_unnecessary(skb); \
2456 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2457 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2459 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2461 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2463 #define skb_gro_checksum_simple_validate(skb) \
2464 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2466 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2468 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2469 !NAPI_GRO_CB(skb)->csum_valid);
2472 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2473 __sum16 check, __wsum pseudo)
2475 NAPI_GRO_CB(skb)->csum = ~pseudo;
2476 NAPI_GRO_CB(skb)->csum_valid = 1;
2479 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2481 if (__skb_gro_checksum_convert_check(skb)) \
2482 __skb_gro_checksum_convert(skb, check, \
2483 compute_pseudo(skb, proto)); \
2486 struct gro_remcsum {
2491 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2497 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2498 unsigned int off, size_t hdrlen,
2499 int start, int offset,
2500 struct gro_remcsum *grc,
2504 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2506 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2509 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2513 ptr = skb_gro_header_fast(skb, off);
2514 if (skb_gro_header_hard(skb, off + plen)) {
2515 ptr = skb_gro_header_slow(skb, off + plen, off);
2520 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2523 /* Adjust skb->csum since we changed the packet */
2524 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2526 grc->offset = off + hdrlen + offset;
2532 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2533 struct gro_remcsum *grc)
2536 size_t plen = grc->offset + sizeof(u16);
2541 ptr = skb_gro_header_fast(skb, grc->offset);
2542 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2543 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2548 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2551 struct skb_csum_offl_spec {
2565 bool __skb_csum_offload_chk(struct sk_buff *skb,
2566 const struct skb_csum_offl_spec *spec,
2567 bool *csum_encapped,
2570 static inline bool skb_csum_offload_chk(struct sk_buff *skb,
2571 const struct skb_csum_offl_spec *spec,
2572 bool *csum_encapped,
2575 if (skb->ip_summed != CHECKSUM_PARTIAL)
2578 return __skb_csum_offload_chk(skb, spec, csum_encapped, csum_help);
2581 static inline bool skb_csum_offload_chk_help(struct sk_buff *skb,
2582 const struct skb_csum_offl_spec *spec)
2586 return skb_csum_offload_chk(skb, spec, &csum_encapped, true);
2589 static inline bool skb_csum_off_chk_help_cmn(struct sk_buff *skb)
2591 static const struct skb_csum_offl_spec csum_offl_spec = {
2593 .ip_options_okay = 1,
2600 return skb_csum_offload_chk_help(skb, &csum_offl_spec);
2603 static inline bool skb_csum_off_chk_help_cmn_v4_only(struct sk_buff *skb)
2605 static const struct skb_csum_offl_spec csum_offl_spec = {
2607 .ip_options_okay = 1,
2613 return skb_csum_offload_chk_help(skb, &csum_offl_spec);
2616 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2617 unsigned short type,
2618 const void *daddr, const void *saddr,
2621 if (!dev->header_ops || !dev->header_ops->create)
2624 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2627 static inline int dev_parse_header(const struct sk_buff *skb,
2628 unsigned char *haddr)
2630 const struct net_device *dev = skb->dev;
2632 if (!dev->header_ops || !dev->header_ops->parse)
2634 return dev->header_ops->parse(skb, haddr);
2637 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2638 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2639 static inline int unregister_gifconf(unsigned int family)
2641 return register_gifconf(family, NULL);
2644 #ifdef CONFIG_NET_FLOW_LIMIT
2645 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2646 struct sd_flow_limit {
2648 unsigned int num_buckets;
2649 unsigned int history_head;
2650 u16 history[FLOW_LIMIT_HISTORY];
2654 extern int netdev_flow_limit_table_len;
2655 #endif /* CONFIG_NET_FLOW_LIMIT */
2658 * Incoming packets are placed on per-cpu queues
2660 struct softnet_data {
2661 struct list_head poll_list;
2662 struct sk_buff_head process_queue;
2665 unsigned int processed;
2666 unsigned int time_squeeze;
2667 unsigned int cpu_collision;
2668 unsigned int received_rps;
2670 struct softnet_data *rps_ipi_list;
2672 #ifdef CONFIG_NET_FLOW_LIMIT
2673 struct sd_flow_limit __rcu *flow_limit;
2675 struct Qdisc *output_queue;
2676 struct Qdisc **output_queue_tailp;
2677 struct sk_buff *completion_queue;
2680 /* Elements below can be accessed between CPUs for RPS */
2681 struct call_single_data csd ____cacheline_aligned_in_smp;
2682 struct softnet_data *rps_ipi_next;
2684 unsigned int input_queue_head;
2685 unsigned int input_queue_tail;
2687 unsigned int dropped;
2688 struct sk_buff_head input_pkt_queue;
2689 struct napi_struct backlog;
2693 static inline void input_queue_head_incr(struct softnet_data *sd)
2696 sd->input_queue_head++;
2700 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2701 unsigned int *qtail)
2704 *qtail = ++sd->input_queue_tail;
2708 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2710 void __netif_schedule(struct Qdisc *q);
2711 void netif_schedule_queue(struct netdev_queue *txq);
2713 static inline void netif_tx_schedule_all(struct net_device *dev)
2717 for (i = 0; i < dev->num_tx_queues; i++)
2718 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2721 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2723 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2727 * netif_start_queue - allow transmit
2728 * @dev: network device
2730 * Allow upper layers to call the device hard_start_xmit routine.
2732 static inline void netif_start_queue(struct net_device *dev)
2734 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2737 static inline void netif_tx_start_all_queues(struct net_device *dev)
2741 for (i = 0; i < dev->num_tx_queues; i++) {
2742 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2743 netif_tx_start_queue(txq);
2747 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2750 * netif_wake_queue - restart transmit
2751 * @dev: network device
2753 * Allow upper layers to call the device hard_start_xmit routine.
2754 * Used for flow control when transmit resources are available.
2756 static inline void netif_wake_queue(struct net_device *dev)
2758 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2761 static inline void netif_tx_wake_all_queues(struct net_device *dev)
2765 for (i = 0; i < dev->num_tx_queues; i++) {
2766 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2767 netif_tx_wake_queue(txq);
2771 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2773 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2777 * netif_stop_queue - stop transmitted packets
2778 * @dev: network device
2780 * Stop upper layers calling the device hard_start_xmit routine.
2781 * Used for flow control when transmit resources are unavailable.
2783 static inline void netif_stop_queue(struct net_device *dev)
2785 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2788 void netif_tx_stop_all_queues(struct net_device *dev);
2790 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2792 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2796 * netif_queue_stopped - test if transmit queue is flowblocked
2797 * @dev: network device
2799 * Test if transmit queue on device is currently unable to send.
2801 static inline bool netif_queue_stopped(const struct net_device *dev)
2803 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2806 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2808 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2812 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2814 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2818 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2820 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2824 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2825 * @dev_queue: pointer to transmit queue
2827 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2828 * to give appropriate hint to the cpu.
2830 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2833 prefetchw(&dev_queue->dql.num_queued);
2838 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2839 * @dev_queue: pointer to transmit queue
2841 * BQL enabled drivers might use this helper in their TX completion path,
2842 * to give appropriate hint to the cpu.
2844 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
2847 prefetchw(&dev_queue->dql.limit);
2851 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2855 dql_queued(&dev_queue->dql, bytes);
2857 if (likely(dql_avail(&dev_queue->dql) >= 0))
2860 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2863 * The XOFF flag must be set before checking the dql_avail below,
2864 * because in netdev_tx_completed_queue we update the dql_completed
2865 * before checking the XOFF flag.
2869 /* check again in case another CPU has just made room avail */
2870 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2871 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2876 * netdev_sent_queue - report the number of bytes queued to hardware
2877 * @dev: network device
2878 * @bytes: number of bytes queued to the hardware device queue
2880 * Report the number of bytes queued for sending/completion to the network
2881 * device hardware queue. @bytes should be a good approximation and should
2882 * exactly match netdev_completed_queue() @bytes
2884 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2886 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2889 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2890 unsigned int pkts, unsigned int bytes)
2893 if (unlikely(!bytes))
2896 dql_completed(&dev_queue->dql, bytes);
2899 * Without the memory barrier there is a small possiblity that
2900 * netdev_tx_sent_queue will miss the update and cause the queue to
2901 * be stopped forever
2905 if (dql_avail(&dev_queue->dql) < 0)
2908 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2909 netif_schedule_queue(dev_queue);
2914 * netdev_completed_queue - report bytes and packets completed by device
2915 * @dev: network device
2916 * @pkts: actual number of packets sent over the medium
2917 * @bytes: actual number of bytes sent over the medium
2919 * Report the number of bytes and packets transmitted by the network device
2920 * hardware queue over the physical medium, @bytes must exactly match the
2921 * @bytes amount passed to netdev_sent_queue()
2923 static inline void netdev_completed_queue(struct net_device *dev,
2924 unsigned int pkts, unsigned int bytes)
2926 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2929 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2932 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
2938 * netdev_reset_queue - reset the packets and bytes count of a network device
2939 * @dev_queue: network device
2941 * Reset the bytes and packet count of a network device and clear the
2942 * software flow control OFF bit for this network device
2944 static inline void netdev_reset_queue(struct net_device *dev_queue)
2946 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2950 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2951 * @dev: network device
2952 * @queue_index: given tx queue index
2954 * Returns 0 if given tx queue index >= number of device tx queues,
2955 * otherwise returns the originally passed tx queue index.
2957 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
2959 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
2960 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2961 dev->name, queue_index,
2962 dev->real_num_tx_queues);
2970 * netif_running - test if up
2971 * @dev: network device
2973 * Test if the device has been brought up.
2975 static inline bool netif_running(const struct net_device *dev)
2977 return test_bit(__LINK_STATE_START, &dev->state);
2981 * Routines to manage the subqueues on a device. We only need start
2982 * stop, and a check if it's stopped. All other device management is
2983 * done at the overall netdevice level.
2984 * Also test the device if we're multiqueue.
2988 * netif_start_subqueue - allow sending packets on subqueue
2989 * @dev: network device
2990 * @queue_index: sub queue index
2992 * Start individual transmit queue of a device with multiple transmit queues.
2994 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2996 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2998 netif_tx_start_queue(txq);
3002 * netif_stop_subqueue - stop sending packets on subqueue
3003 * @dev: network device
3004 * @queue_index: sub queue index
3006 * Stop individual transmit queue of a device with multiple transmit queues.
3008 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3010 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3011 netif_tx_stop_queue(txq);
3015 * netif_subqueue_stopped - test status of subqueue
3016 * @dev: network device
3017 * @queue_index: sub queue index
3019 * Check individual transmit queue of a device with multiple transmit queues.
3021 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3024 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3026 return netif_tx_queue_stopped(txq);
3029 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3030 struct sk_buff *skb)
3032 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3035 void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
3038 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3041 static inline int netif_set_xps_queue(struct net_device *dev,
3042 const struct cpumask *mask,
3049 u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
3050 unsigned int num_tx_queues);
3053 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
3054 * as a distribution range limit for the returned value.
3056 static inline u16 skb_tx_hash(const struct net_device *dev,
3057 struct sk_buff *skb)
3059 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
3063 * netif_is_multiqueue - test if device has multiple transmit queues
3064 * @dev: network device
3066 * Check if device has multiple transmit queues
3068 static inline bool netif_is_multiqueue(const struct net_device *dev)
3070 return dev->num_tx_queues > 1;
3073 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3076 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3078 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3086 static inline unsigned int get_netdev_rx_queue_index(
3087 struct netdev_rx_queue *queue)
3089 struct net_device *dev = queue->dev;
3090 int index = queue - dev->_rx;
3092 BUG_ON(index >= dev->num_rx_queues);
3097 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3098 int netif_get_num_default_rss_queues(void);
3100 enum skb_free_reason {
3101 SKB_REASON_CONSUMED,
3105 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3106 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3109 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3110 * interrupt context or with hardware interrupts being disabled.
3111 * (in_irq() || irqs_disabled())
3113 * We provide four helpers that can be used in following contexts :
3115 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3116 * replacing kfree_skb(skb)
3118 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3119 * Typically used in place of consume_skb(skb) in TX completion path
3121 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3122 * replacing kfree_skb(skb)
3124 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3125 * and consumed a packet. Used in place of consume_skb(skb)
3127 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3129 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3132 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3134 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3137 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3139 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3142 static inline void dev_consume_skb_any(struct sk_buff *skb)
3144 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3147 int netif_rx(struct sk_buff *skb);
3148 int netif_rx_ni(struct sk_buff *skb);
3149 int netif_receive_skb(struct sk_buff *skb);
3150 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3151 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3152 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3153 gro_result_t napi_gro_frags(struct napi_struct *napi);
3154 struct packet_offload *gro_find_receive_by_type(__be16 type);
3155 struct packet_offload *gro_find_complete_by_type(__be16 type);
3157 static inline void napi_free_frags(struct napi_struct *napi)
3159 kfree_skb(napi->skb);
3163 int netdev_rx_handler_register(struct net_device *dev,
3164 rx_handler_func_t *rx_handler,
3165 void *rx_handler_data);
3166 void netdev_rx_handler_unregister(struct net_device *dev);
3168 bool dev_valid_name(const char *name);
3169 int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
3170 int dev_ethtool(struct net *net, struct ifreq *);
3171 unsigned int dev_get_flags(const struct net_device *);
3172 int __dev_change_flags(struct net_device *, unsigned int flags);
3173 int dev_change_flags(struct net_device *, unsigned int);
3174 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3175 unsigned int gchanges);
3176 int dev_change_name(struct net_device *, const char *);
3177 int dev_set_alias(struct net_device *, const char *, size_t);
3178 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3179 int dev_set_mtu(struct net_device *, int);
3180 void dev_set_group(struct net_device *, int);
3181 int dev_set_mac_address(struct net_device *, struct sockaddr *);
3182 int dev_change_carrier(struct net_device *, bool new_carrier);
3183 int dev_get_phys_port_id(struct net_device *dev,
3184 struct netdev_phys_item_id *ppid);
3185 int dev_get_phys_port_name(struct net_device *dev,
3186 char *name, size_t len);
3187 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3188 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
3189 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3190 struct netdev_queue *txq, int *ret);
3191 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3192 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3193 bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
3195 extern int netdev_budget;
3197 /* Called by rtnetlink.c:rtnl_unlock() */
3198 void netdev_run_todo(void);
3201 * dev_put - release reference to device
3202 * @dev: network device
3204 * Release reference to device to allow it to be freed.
3206 static inline void dev_put(struct net_device *dev)
3208 this_cpu_dec(*dev->pcpu_refcnt);
3212 * dev_hold - get reference to device
3213 * @dev: network device
3215 * Hold reference to device to keep it from being freed.
3217 static inline void dev_hold(struct net_device *dev)
3219 this_cpu_inc(*dev->pcpu_refcnt);
3222 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3223 * and _off may be called from IRQ context, but it is caller
3224 * who is responsible for serialization of these calls.
3226 * The name carrier is inappropriate, these functions should really be
3227 * called netif_lowerlayer_*() because they represent the state of any
3228 * kind of lower layer not just hardware media.
3231 void linkwatch_init_dev(struct net_device *dev);
3232 void linkwatch_fire_event(struct net_device *dev);
3233 void linkwatch_forget_dev(struct net_device *dev);
3236 * netif_carrier_ok - test if carrier present
3237 * @dev: network device
3239 * Check if carrier is present on device
3241 static inline bool netif_carrier_ok(const struct net_device *dev)
3243 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3246 unsigned long dev_trans_start(struct net_device *dev);
3248 void __netdev_watchdog_up(struct net_device *dev);
3250 void netif_carrier_on(struct net_device *dev);
3252 void netif_carrier_off(struct net_device *dev);
3255 * netif_dormant_on - mark device as dormant.
3256 * @dev: network device
3258 * Mark device as dormant (as per RFC2863).
3260 * The dormant state indicates that the relevant interface is not
3261 * actually in a condition to pass packets (i.e., it is not 'up') but is
3262 * in a "pending" state, waiting for some external event. For "on-
3263 * demand" interfaces, this new state identifies the situation where the
3264 * interface is waiting for events to place it in the up state.
3267 static inline void netif_dormant_on(struct net_device *dev)
3269 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3270 linkwatch_fire_event(dev);
3274 * netif_dormant_off - set device as not dormant.
3275 * @dev: network device
3277 * Device is not in dormant state.
3279 static inline void netif_dormant_off(struct net_device *dev)
3281 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3282 linkwatch_fire_event(dev);
3286 * netif_dormant - test if carrier present
3287 * @dev: network device
3289 * Check if carrier is present on device
3291 static inline bool netif_dormant(const struct net_device *dev)
3293 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3298 * netif_oper_up - test if device is operational
3299 * @dev: network device
3301 * Check if carrier is operational
3303 static inline bool netif_oper_up(const struct net_device *dev)
3305 return (dev->operstate == IF_OPER_UP ||
3306 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3310 * netif_device_present - is device available or removed
3311 * @dev: network device
3313 * Check if device has not been removed from system.
3315 static inline bool netif_device_present(struct net_device *dev)
3317 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3320 void netif_device_detach(struct net_device *dev);
3322 void netif_device_attach(struct net_device *dev);
3325 * Network interface message level settings
3329 NETIF_MSG_DRV = 0x0001,
3330 NETIF_MSG_PROBE = 0x0002,
3331 NETIF_MSG_LINK = 0x0004,
3332 NETIF_MSG_TIMER = 0x0008,
3333 NETIF_MSG_IFDOWN = 0x0010,
3334 NETIF_MSG_IFUP = 0x0020,
3335 NETIF_MSG_RX_ERR = 0x0040,
3336 NETIF_MSG_TX_ERR = 0x0080,
3337 NETIF_MSG_TX_QUEUED = 0x0100,
3338 NETIF_MSG_INTR = 0x0200,
3339 NETIF_MSG_TX_DONE = 0x0400,
3340 NETIF_MSG_RX_STATUS = 0x0800,
3341 NETIF_MSG_PKTDATA = 0x1000,
3342 NETIF_MSG_HW = 0x2000,
3343 NETIF_MSG_WOL = 0x4000,
3346 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3347 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3348 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3349 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3350 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3351 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3352 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3353 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3354 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3355 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3356 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3357 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3358 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3359 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3360 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3362 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3365 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3366 return default_msg_enable_bits;
3367 if (debug_value == 0) /* no output */
3369 /* set low N bits */
3370 return (1 << debug_value) - 1;
3373 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3375 spin_lock(&txq->_xmit_lock);
3376 txq->xmit_lock_owner = cpu;
3379 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3381 spin_lock_bh(&txq->_xmit_lock);
3382 txq->xmit_lock_owner = smp_processor_id();
3385 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3387 bool ok = spin_trylock(&txq->_xmit_lock);
3389 txq->xmit_lock_owner = smp_processor_id();
3393 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3395 txq->xmit_lock_owner = -1;
3396 spin_unlock(&txq->_xmit_lock);
3399 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3401 txq->xmit_lock_owner = -1;
3402 spin_unlock_bh(&txq->_xmit_lock);
3405 static inline void txq_trans_update(struct netdev_queue *txq)
3407 if (txq->xmit_lock_owner != -1)
3408 txq->trans_start = jiffies;
3412 * netif_tx_lock - grab network device transmit lock
3413 * @dev: network device
3415 * Get network device transmit lock
3417 static inline void netif_tx_lock(struct net_device *dev)
3422 spin_lock(&dev->tx_global_lock);
3423 cpu = smp_processor_id();
3424 for (i = 0; i < dev->num_tx_queues; i++) {
3425 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3427 /* We are the only thread of execution doing a
3428 * freeze, but we have to grab the _xmit_lock in
3429 * order to synchronize with threads which are in
3430 * the ->hard_start_xmit() handler and already
3431 * checked the frozen bit.
3433 __netif_tx_lock(txq, cpu);
3434 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3435 __netif_tx_unlock(txq);
3439 static inline void netif_tx_lock_bh(struct net_device *dev)
3445 static inline void netif_tx_unlock(struct net_device *dev)
3449 for (i = 0; i < dev->num_tx_queues; i++) {
3450 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3452 /* No need to grab the _xmit_lock here. If the
3453 * queue is not stopped for another reason, we
3456 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3457 netif_schedule_queue(txq);
3459 spin_unlock(&dev->tx_global_lock);
3462 static inline void netif_tx_unlock_bh(struct net_device *dev)
3464 netif_tx_unlock(dev);
3468 #define HARD_TX_LOCK(dev, txq, cpu) { \
3469 if ((dev->features & NETIF_F_LLTX) == 0) { \
3470 __netif_tx_lock(txq, cpu); \
3474 #define HARD_TX_TRYLOCK(dev, txq) \
3475 (((dev->features & NETIF_F_LLTX) == 0) ? \
3476 __netif_tx_trylock(txq) : \
3479 #define HARD_TX_UNLOCK(dev, txq) { \
3480 if ((dev->features & NETIF_F_LLTX) == 0) { \
3481 __netif_tx_unlock(txq); \
3485 static inline void netif_tx_disable(struct net_device *dev)
3491 cpu = smp_processor_id();
3492 for (i = 0; i < dev->num_tx_queues; i++) {
3493 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3495 __netif_tx_lock(txq, cpu);
3496 netif_tx_stop_queue(txq);
3497 __netif_tx_unlock(txq);
3502 static inline void netif_addr_lock(struct net_device *dev)
3504 spin_lock(&dev->addr_list_lock);
3507 static inline void netif_addr_lock_nested(struct net_device *dev)
3509 int subclass = SINGLE_DEPTH_NESTING;
3511 if (dev->netdev_ops->ndo_get_lock_subclass)
3512 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3514 spin_lock_nested(&dev->addr_list_lock, subclass);
3517 static inline void netif_addr_lock_bh(struct net_device *dev)
3519 spin_lock_bh(&dev->addr_list_lock);
3522 static inline void netif_addr_unlock(struct net_device *dev)
3524 spin_unlock(&dev->addr_list_lock);
3527 static inline void netif_addr_unlock_bh(struct net_device *dev)
3529 spin_unlock_bh(&dev->addr_list_lock);
3533 * dev_addrs walker. Should be used only for read access. Call with
3534 * rcu_read_lock held.
3536 #define for_each_dev_addr(dev, ha) \
3537 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3539 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3541 void ether_setup(struct net_device *dev);
3543 /* Support for loadable net-drivers */
3544 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3545 unsigned char name_assign_type,
3546 void (*setup)(struct net_device *),
3547 unsigned int txqs, unsigned int rxqs);
3548 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3549 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3551 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3552 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3555 int register_netdev(struct net_device *dev);
3556 void unregister_netdev(struct net_device *dev);
3558 /* General hardware address lists handling functions */
3559 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3560 struct netdev_hw_addr_list *from_list, int addr_len);
3561 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3562 struct netdev_hw_addr_list *from_list, int addr_len);
3563 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3564 struct net_device *dev,
3565 int (*sync)(struct net_device *, const unsigned char *),
3566 int (*unsync)(struct net_device *,
3567 const unsigned char *));
3568 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3569 struct net_device *dev,
3570 int (*unsync)(struct net_device *,
3571 const unsigned char *));
3572 void __hw_addr_init(struct netdev_hw_addr_list *list);
3574 /* Functions used for device addresses handling */
3575 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3576 unsigned char addr_type);
3577 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3578 unsigned char addr_type);
3579 void dev_addr_flush(struct net_device *dev);
3580 int dev_addr_init(struct net_device *dev);
3582 /* Functions used for unicast addresses handling */
3583 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3584 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3585 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3586 int dev_uc_sync(struct net_device *to, struct net_device *from);
3587 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3588 void dev_uc_unsync(struct net_device *to, struct net_device *from);
3589 void dev_uc_flush(struct net_device *dev);
3590 void dev_uc_init(struct net_device *dev);
3593 * __dev_uc_sync - Synchonize device's unicast list
3594 * @dev: device to sync
3595 * @sync: function to call if address should be added
3596 * @unsync: function to call if address should be removed
3598 * Add newly added addresses to the interface, and release
3599 * addresses that have been deleted.
3601 static inline int __dev_uc_sync(struct net_device *dev,
3602 int (*sync)(struct net_device *,
3603 const unsigned char *),
3604 int (*unsync)(struct net_device *,
3605 const unsigned char *))
3607 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3611 * __dev_uc_unsync - Remove synchronized addresses from device
3612 * @dev: device to sync
3613 * @unsync: function to call if address should be removed
3615 * Remove all addresses that were added to the device by dev_uc_sync().
3617 static inline void __dev_uc_unsync(struct net_device *dev,
3618 int (*unsync)(struct net_device *,
3619 const unsigned char *))
3621 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3624 /* Functions used for multicast addresses handling */
3625 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3626 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3627 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3628 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3629 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3630 int dev_mc_sync(struct net_device *to, struct net_device *from);
3631 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3632 void dev_mc_unsync(struct net_device *to, struct net_device *from);
3633 void dev_mc_flush(struct net_device *dev);
3634 void dev_mc_init(struct net_device *dev);
3637 * __dev_mc_sync - Synchonize device's multicast list
3638 * @dev: device to sync
3639 * @sync: function to call if address should be added
3640 * @unsync: function to call if address should be removed
3642 * Add newly added addresses to the interface, and release
3643 * addresses that have been deleted.
3645 static inline int __dev_mc_sync(struct net_device *dev,
3646 int (*sync)(struct net_device *,
3647 const unsigned char *),
3648 int (*unsync)(struct net_device *,
3649 const unsigned char *))
3651 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3655 * __dev_mc_unsync - Remove synchronized addresses from device
3656 * @dev: device to sync
3657 * @unsync: function to call if address should be removed
3659 * Remove all addresses that were added to the device by dev_mc_sync().
3661 static inline void __dev_mc_unsync(struct net_device *dev,
3662 int (*unsync)(struct net_device *,
3663 const unsigned char *))
3665 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3668 /* Functions used for secondary unicast and multicast support */
3669 void dev_set_rx_mode(struct net_device *dev);
3670 void __dev_set_rx_mode(struct net_device *dev);
3671 int dev_set_promiscuity(struct net_device *dev, int inc);
3672 int dev_set_allmulti(struct net_device *dev, int inc);
3673 void netdev_state_change(struct net_device *dev);
3674 void netdev_notify_peers(struct net_device *dev);
3675 void netdev_features_change(struct net_device *dev);
3676 /* Load a device via the kmod */
3677 void dev_load(struct net *net, const char *name);
3678 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3679 struct rtnl_link_stats64 *storage);
3680 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3681 const struct net_device_stats *netdev_stats);
3683 extern int netdev_max_backlog;
3684 extern int netdev_tstamp_prequeue;
3685 extern int weight_p;
3686 extern int bpf_jit_enable;
3688 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3689 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3690 struct list_head **iter);
3691 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3692 struct list_head **iter);
3694 /* iterate through upper list, must be called under RCU read lock */
3695 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3696 for (iter = &(dev)->adj_list.upper, \
3697 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3699 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3701 /* iterate through upper list, must be called under RCU read lock */
3702 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3703 for (iter = &(dev)->all_adj_list.upper, \
3704 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3706 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3708 void *netdev_lower_get_next_private(struct net_device *dev,
3709 struct list_head **iter);
3710 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3711 struct list_head **iter);
3713 #define netdev_for_each_lower_private(dev, priv, iter) \
3714 for (iter = (dev)->adj_list.lower.next, \
3715 priv = netdev_lower_get_next_private(dev, &(iter)); \
3717 priv = netdev_lower_get_next_private(dev, &(iter)))
3719 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3720 for (iter = &(dev)->adj_list.lower, \
3721 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3723 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3725 void *netdev_lower_get_next(struct net_device *dev,
3726 struct list_head **iter);
3727 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3728 for (iter = &(dev)->adj_list.lower, \
3729 ldev = netdev_lower_get_next(dev, &(iter)); \
3731 ldev = netdev_lower_get_next(dev, &(iter)))
3733 void *netdev_adjacent_get_private(struct list_head *adj_list);
3734 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3735 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3736 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3737 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
3738 int netdev_master_upper_dev_link(struct net_device *dev,
3739 struct net_device *upper_dev,
3740 void *upper_priv, void *upper_info);
3741 void netdev_upper_dev_unlink(struct net_device *dev,
3742 struct net_device *upper_dev);
3743 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3744 void *netdev_lower_dev_get_private(struct net_device *dev,
3745 struct net_device *lower_dev);
3746 void netdev_lower_state_changed(struct net_device *lower_dev,
3747 void *lower_state_info);
3749 /* RSS keys are 40 or 52 bytes long */
3750 #define NETDEV_RSS_KEY_LEN 52
3751 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
3752 void netdev_rss_key_fill(void *buffer, size_t len);
3754 int dev_get_nest_level(struct net_device *dev,
3755 bool (*type_check)(const struct net_device *dev));
3756 int skb_checksum_help(struct sk_buff *skb);
3757 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
3758 netdev_features_t features, bool tx_path);
3759 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
3760 netdev_features_t features);
3762 struct netdev_bonding_info {
3767 struct netdev_notifier_bonding_info {
3768 struct netdev_notifier_info info; /* must be first */
3769 struct netdev_bonding_info bonding_info;
3772 void netdev_bonding_info_change(struct net_device *dev,
3773 struct netdev_bonding_info *bonding_info);
3776 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
3778 return __skb_gso_segment(skb, features, true);
3780 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3782 static inline bool can_checksum_protocol(netdev_features_t features,
3785 if (protocol == htons(ETH_P_FCOE))
3786 return !!(features & NETIF_F_FCOE_CRC);
3788 /* Assume this is an IP checksum (not SCTP CRC) */
3790 if (features & NETIF_F_HW_CSUM) {
3791 /* Can checksum everything */
3796 case htons(ETH_P_IP):
3797 return !!(features & NETIF_F_IP_CSUM);
3798 case htons(ETH_P_IPV6):
3799 return !!(features & NETIF_F_IPV6_CSUM);
3805 /* Map an ethertype into IP protocol if possible */
3806 static inline int eproto_to_ipproto(int eproto)
3809 case htons(ETH_P_IP):
3811 case htons(ETH_P_IPV6):
3812 return IPPROTO_IPV6;
3819 void netdev_rx_csum_fault(struct net_device *dev);
3821 static inline void netdev_rx_csum_fault(struct net_device *dev)
3825 /* rx skb timestamps */
3826 void net_enable_timestamp(void);
3827 void net_disable_timestamp(void);
3829 #ifdef CONFIG_PROC_FS
3830 int __init dev_proc_init(void);
3832 #define dev_proc_init() 0
3835 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3836 struct sk_buff *skb, struct net_device *dev,
3839 skb->xmit_more = more ? 1 : 0;
3840 return ops->ndo_start_xmit(skb, dev);
3843 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3844 struct netdev_queue *txq, bool more)
3846 const struct net_device_ops *ops = dev->netdev_ops;
3849 rc = __netdev_start_xmit(ops, skb, dev, more);
3850 if (rc == NETDEV_TX_OK)
3851 txq_trans_update(txq);
3856 int netdev_class_create_file_ns(struct class_attribute *class_attr,
3858 void netdev_class_remove_file_ns(struct class_attribute *class_attr,
3861 static inline int netdev_class_create_file(struct class_attribute *class_attr)
3863 return netdev_class_create_file_ns(class_attr, NULL);
3866 static inline void netdev_class_remove_file(struct class_attribute *class_attr)
3868 netdev_class_remove_file_ns(class_attr, NULL);
3871 extern struct kobj_ns_type_operations net_ns_type_operations;
3873 const char *netdev_drivername(const struct net_device *dev);
3875 void linkwatch_run_queue(void);
3877 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
3878 netdev_features_t f2)
3880 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
3881 if (f1 & NETIF_F_HW_CSUM)
3882 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
3884 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
3890 static inline netdev_features_t netdev_get_wanted_features(
3891 struct net_device *dev)
3893 return (dev->features & ~dev->hw_features) | dev->wanted_features;
3895 netdev_features_t netdev_increment_features(netdev_features_t all,
3896 netdev_features_t one, netdev_features_t mask);
3898 /* Allow TSO being used on stacked device :
3899 * Performing the GSO segmentation before last device
3900 * is a performance improvement.
3902 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
3903 netdev_features_t mask)
3905 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
3908 int __netdev_update_features(struct net_device *dev);
3909 void netdev_update_features(struct net_device *dev);
3910 void netdev_change_features(struct net_device *dev);
3912 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
3913 struct net_device *dev);
3915 netdev_features_t passthru_features_check(struct sk_buff *skb,
3916 struct net_device *dev,
3917 netdev_features_t features);
3918 netdev_features_t netif_skb_features(struct sk_buff *skb);
3920 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
3922 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
3924 /* check flags correspondence */
3925 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
3926 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
3927 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
3928 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
3929 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
3930 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
3931 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
3932 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
3933 BUILD_BUG_ON(SKB_GSO_IPIP != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT));
3934 BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT));
3935 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
3936 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
3937 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
3939 return (features & feature) == feature;
3942 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
3944 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
3945 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
3948 static inline bool netif_needs_gso(struct sk_buff *skb,
3949 netdev_features_t features)
3951 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
3952 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
3953 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
3956 static inline void netif_set_gso_max_size(struct net_device *dev,
3959 dev->gso_max_size = size;
3962 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
3963 int pulled_hlen, u16 mac_offset,
3966 skb->protocol = protocol;
3967 skb->encapsulation = 1;
3968 skb_push(skb, pulled_hlen);
3969 skb_reset_transport_header(skb);
3970 skb->mac_header = mac_offset;
3971 skb->network_header = skb->mac_header + mac_len;
3972 skb->mac_len = mac_len;
3975 static inline bool netif_is_macvlan(const struct net_device *dev)
3977 return dev->priv_flags & IFF_MACVLAN;
3980 static inline bool netif_is_macvlan_port(const struct net_device *dev)
3982 return dev->priv_flags & IFF_MACVLAN_PORT;
3985 static inline bool netif_is_ipvlan(const struct net_device *dev)
3987 return dev->priv_flags & IFF_IPVLAN_SLAVE;
3990 static inline bool netif_is_ipvlan_port(const struct net_device *dev)
3992 return dev->priv_flags & IFF_IPVLAN_MASTER;
3995 static inline bool netif_is_bond_master(const struct net_device *dev)
3997 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4000 static inline bool netif_is_bond_slave(const struct net_device *dev)
4002 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4005 static inline bool netif_supports_nofcs(struct net_device *dev)
4007 return dev->priv_flags & IFF_SUPP_NOFCS;
4010 static inline bool netif_is_l3_master(const struct net_device *dev)
4012 return dev->priv_flags & IFF_L3MDEV_MASTER;
4015 static inline bool netif_is_l3_slave(const struct net_device *dev)
4017 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4020 static inline bool netif_is_bridge_master(const struct net_device *dev)
4022 return dev->priv_flags & IFF_EBRIDGE;
4025 static inline bool netif_is_bridge_port(const struct net_device *dev)
4027 return dev->priv_flags & IFF_BRIDGE_PORT;
4030 static inline bool netif_is_ovs_master(const struct net_device *dev)
4032 return dev->priv_flags & IFF_OPENVSWITCH;
4035 static inline bool netif_is_team_master(const struct net_device *dev)
4037 return dev->priv_flags & IFF_TEAM;
4040 static inline bool netif_is_team_port(const struct net_device *dev)
4042 return dev->priv_flags & IFF_TEAM_PORT;
4045 static inline bool netif_is_lag_master(const struct net_device *dev)
4047 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4050 static inline bool netif_is_lag_port(const struct net_device *dev)
4052 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4055 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4057 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4060 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4061 static inline void netif_keep_dst(struct net_device *dev)
4063 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4066 extern struct pernet_operations __net_initdata loopback_net_ops;
4068 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4070 /* netdev_printk helpers, similar to dev_printk */
4072 static inline const char *netdev_name(const struct net_device *dev)
4074 if (!dev->name[0] || strchr(dev->name, '%'))
4075 return "(unnamed net_device)";
4079 static inline const char *netdev_reg_state(const struct net_device *dev)
4081 switch (dev->reg_state) {
4082 case NETREG_UNINITIALIZED: return " (uninitialized)";
4083 case NETREG_REGISTERED: return "";
4084 case NETREG_UNREGISTERING: return " (unregistering)";
4085 case NETREG_UNREGISTERED: return " (unregistered)";
4086 case NETREG_RELEASED: return " (released)";
4087 case NETREG_DUMMY: return " (dummy)";
4090 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4091 return " (unknown)";
4095 void netdev_printk(const char *level, const struct net_device *dev,
4096 const char *format, ...);
4098 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4100 void netdev_alert(const struct net_device *dev, const char *format, ...);
4102 void netdev_crit(const struct net_device *dev, const char *format, ...);
4104 void netdev_err(const struct net_device *dev, const char *format, ...);
4106 void netdev_warn(const struct net_device *dev, const char *format, ...);
4108 void netdev_notice(const struct net_device *dev, const char *format, ...);
4110 void netdev_info(const struct net_device *dev, const char *format, ...);
4112 #define MODULE_ALIAS_NETDEV(device) \
4113 MODULE_ALIAS("netdev-" device)
4115 #if defined(CONFIG_DYNAMIC_DEBUG)
4116 #define netdev_dbg(__dev, format, args...) \
4118 dynamic_netdev_dbg(__dev, format, ##args); \
4120 #elif defined(DEBUG)
4121 #define netdev_dbg(__dev, format, args...) \
4122 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4124 #define netdev_dbg(__dev, format, args...) \
4127 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4131 #if defined(VERBOSE_DEBUG)
4132 #define netdev_vdbg netdev_dbg
4135 #define netdev_vdbg(dev, format, args...) \
4138 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4144 * netdev_WARN() acts like dev_printk(), but with the key difference
4145 * of using a WARN/WARN_ON to get the message out, including the
4146 * file/line information and a backtrace.
4148 #define netdev_WARN(dev, format, args...) \
4149 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
4150 netdev_reg_state(dev), ##args)
4152 /* netif printk helpers, similar to netdev_printk */
4154 #define netif_printk(priv, type, level, dev, fmt, args...) \
4156 if (netif_msg_##type(priv)) \
4157 netdev_printk(level, (dev), fmt, ##args); \
4160 #define netif_level(level, priv, type, dev, fmt, args...) \
4162 if (netif_msg_##type(priv)) \
4163 netdev_##level(dev, fmt, ##args); \
4166 #define netif_emerg(priv, type, dev, fmt, args...) \
4167 netif_level(emerg, priv, type, dev, fmt, ##args)
4168 #define netif_alert(priv, type, dev, fmt, args...) \
4169 netif_level(alert, priv, type, dev, fmt, ##args)
4170 #define netif_crit(priv, type, dev, fmt, args...) \
4171 netif_level(crit, priv, type, dev, fmt, ##args)
4172 #define netif_err(priv, type, dev, fmt, args...) \
4173 netif_level(err, priv, type, dev, fmt, ##args)
4174 #define netif_warn(priv, type, dev, fmt, args...) \
4175 netif_level(warn, priv, type, dev, fmt, ##args)
4176 #define netif_notice(priv, type, dev, fmt, args...) \
4177 netif_level(notice, priv, type, dev, fmt, ##args)
4178 #define netif_info(priv, type, dev, fmt, args...) \
4179 netif_level(info, priv, type, dev, fmt, ##args)
4181 #if defined(CONFIG_DYNAMIC_DEBUG)
4182 #define netif_dbg(priv, type, netdev, format, args...) \
4184 if (netif_msg_##type(priv)) \
4185 dynamic_netdev_dbg(netdev, format, ##args); \
4187 #elif defined(DEBUG)
4188 #define netif_dbg(priv, type, dev, format, args...) \
4189 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4191 #define netif_dbg(priv, type, dev, format, args...) \
4194 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4199 #if defined(VERBOSE_DEBUG)
4200 #define netif_vdbg netif_dbg
4202 #define netif_vdbg(priv, type, dev, format, args...) \
4205 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4211 * The list of packet types we will receive (as opposed to discard)
4212 * and the routines to invoke.
4214 * Why 16. Because with 16 the only overlap we get on a hash of the
4215 * low nibble of the protocol value is RARP/SNAP/X.25.
4217 * NOTE: That is no longer true with the addition of VLAN tags. Not
4218 * sure which should go first, but I bet it won't make much
4219 * difference if we are running VLANs. The good news is that
4220 * this protocol won't be in the list unless compiled in, so
4221 * the average user (w/out VLANs) will not be adversely affected.
4237 #define PTYPE_HASH_SIZE (16)
4238 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4240 #endif /* _LINUX_NETDEVICE_H */