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(), and 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*/
110 typedef enum netdev_tx netdev_tx_t;
113 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
114 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
116 static inline bool dev_xmit_complete(int rc)
119 * Positive cases with an skb consumed by a driver:
120 * - successful transmission (rc == NETDEV_TX_OK)
121 * - error while transmitting (rc < 0)
122 * - error while queueing to a different device (rc & NET_XMIT_MASK)
124 if (likely(rc < NET_XMIT_MASK))
131 * Compute the worst-case header length according to the protocols
135 #if defined(CONFIG_HYPERV_NET)
136 # define LL_MAX_HEADER 128
137 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
138 # if defined(CONFIG_MAC80211_MESH)
139 # define LL_MAX_HEADER 128
141 # define LL_MAX_HEADER 96
144 # define LL_MAX_HEADER 32
147 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
148 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
149 #define MAX_HEADER LL_MAX_HEADER
151 #define MAX_HEADER (LL_MAX_HEADER + 48)
155 * Old network device statistics. Fields are native words
156 * (unsigned long) so they can be read and written atomically.
159 struct net_device_stats {
160 unsigned long rx_packets;
161 unsigned long tx_packets;
162 unsigned long rx_bytes;
163 unsigned long tx_bytes;
164 unsigned long rx_errors;
165 unsigned long tx_errors;
166 unsigned long rx_dropped;
167 unsigned long tx_dropped;
168 unsigned long multicast;
169 unsigned long collisions;
170 unsigned long rx_length_errors;
171 unsigned long rx_over_errors;
172 unsigned long rx_crc_errors;
173 unsigned long rx_frame_errors;
174 unsigned long rx_fifo_errors;
175 unsigned long rx_missed_errors;
176 unsigned long tx_aborted_errors;
177 unsigned long tx_carrier_errors;
178 unsigned long tx_fifo_errors;
179 unsigned long tx_heartbeat_errors;
180 unsigned long tx_window_errors;
181 unsigned long rx_compressed;
182 unsigned long tx_compressed;
186 #include <linux/cache.h>
187 #include <linux/skbuff.h>
190 #include <linux/static_key.h>
191 extern struct static_key rps_needed;
198 struct netdev_hw_addr {
199 struct list_head list;
200 unsigned char addr[MAX_ADDR_LEN];
202 #define NETDEV_HW_ADDR_T_LAN 1
203 #define NETDEV_HW_ADDR_T_SAN 2
204 #define NETDEV_HW_ADDR_T_SLAVE 3
205 #define NETDEV_HW_ADDR_T_UNICAST 4
206 #define NETDEV_HW_ADDR_T_MULTICAST 5
211 struct rcu_head rcu_head;
214 struct netdev_hw_addr_list {
215 struct list_head list;
219 #define netdev_hw_addr_list_count(l) ((l)->count)
220 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
221 #define netdev_hw_addr_list_for_each(ha, l) \
222 list_for_each_entry(ha, &(l)->list, list)
224 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
225 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
226 #define netdev_for_each_uc_addr(ha, dev) \
227 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
229 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
230 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
231 #define netdev_for_each_mc_addr(ha, dev) \
232 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
239 /* cached hardware header; allow for machine alignment needs. */
240 #define HH_DATA_MOD 16
241 #define HH_DATA_OFF(__len) \
242 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
243 #define HH_DATA_ALIGN(__len) \
244 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
245 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
248 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
250 * dev->hard_header_len ? (dev->hard_header_len +
251 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
253 * We could use other alignment values, but we must maintain the
254 * relationship HH alignment <= LL alignment.
256 #define LL_RESERVED_SPACE(dev) \
257 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
258 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
259 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 int (*create) (struct sk_buff *skb, struct net_device *dev,
263 unsigned short type, const void *daddr,
264 const void *saddr, unsigned int len);
265 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
266 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
267 void (*cache_update)(struct hh_cache *hh,
268 const struct net_device *dev,
269 const unsigned char *haddr);
270 bool (*validate)(const char *ll_header, unsigned int len);
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 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, pass 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 the 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 way.
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 decides 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 change skb->dev, but wants 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 to
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)
572 unsigned long tx_maxrate;
574 * Number of TX timeouts for this queue
575 * (/sys/class/net/DEV/Q/trans_timeout)
577 unsigned long trans_timeout;
581 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
584 * Time (in jiffies) of last Tx
586 unsigned long trans_start;
593 } ____cacheline_aligned_in_smp;
595 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
597 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
604 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
606 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
613 * This structure holds an RPS map which can be of variable length. The
614 * map is an array of CPUs.
621 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
624 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
625 * tail pointer for that CPU's input queue at the time of last enqueue, and
626 * a hardware filter index.
628 struct rps_dev_flow {
631 unsigned int last_qtail;
633 #define RPS_NO_FILTER 0xffff
636 * The rps_dev_flow_table structure contains a table of flow mappings.
638 struct rps_dev_flow_table {
641 struct rps_dev_flow flows[0];
643 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
644 ((_num) * sizeof(struct rps_dev_flow)))
647 * The rps_sock_flow_table contains mappings of flows to the last CPU
648 * on which they were processed by the application (set in recvmsg).
649 * Each entry is a 32bit value. Upper part is the high-order bits
650 * of flow hash, lower part is CPU number.
651 * rps_cpu_mask is used to partition the space, depending on number of
652 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
653 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
654 * meaning we use 32-6=26 bits for the hash.
656 struct rps_sock_flow_table {
659 u32 ents[0] ____cacheline_aligned_in_smp;
661 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
663 #define RPS_NO_CPU 0xffff
665 extern u32 rps_cpu_mask;
666 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
668 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
672 unsigned int index = hash & table->mask;
673 u32 val = hash & ~rps_cpu_mask;
675 /* We only give a hint, preemption can change CPU under us */
676 val |= raw_smp_processor_id();
678 if (table->ents[index] != val)
679 table->ents[index] = val;
683 #ifdef CONFIG_RFS_ACCEL
684 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
687 #endif /* CONFIG_RPS */
689 /* This structure contains an instance of an RX queue. */
690 struct netdev_rx_queue {
692 struct rps_map __rcu *rps_map;
693 struct rps_dev_flow_table __rcu *rps_flow_table;
696 struct net_device *dev;
697 } ____cacheline_aligned_in_smp;
700 * RX queue sysfs structures and functions.
702 struct rx_queue_attribute {
703 struct attribute attr;
704 ssize_t (*show)(struct netdev_rx_queue *queue,
705 struct rx_queue_attribute *attr, char *buf);
706 ssize_t (*store)(struct netdev_rx_queue *queue,
707 struct rx_queue_attribute *attr, const char *buf, size_t len);
712 * This structure holds an XPS map which can be of variable length. The
713 * map is an array of queues.
717 unsigned int alloc_len;
721 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
722 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
723 - sizeof(struct xps_map)) / sizeof(u16))
726 * This structure holds all XPS maps for device. Maps are indexed by CPU.
728 struct xps_dev_maps {
730 struct xps_map __rcu *cpu_map[0];
732 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
733 (nr_cpu_ids * sizeof(struct xps_map *)))
734 #endif /* CONFIG_XPS */
736 #define TC_MAX_QUEUE 16
737 #define TC_BITMASK 15
738 /* HW offloaded queuing disciplines txq count and offset maps */
739 struct netdev_tc_txq {
744 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
746 * This structure is to hold information about the device
747 * configured to run FCoE protocol stack.
749 struct netdev_fcoe_hbainfo {
750 char manufacturer[64];
751 char serial_number[64];
752 char hardware_version[64];
753 char driver_version[64];
754 char optionrom_version[64];
755 char firmware_version[64];
757 char model_description[256];
761 #define MAX_PHYS_ITEM_ID_LEN 32
763 /* This structure holds a unique identifier to identify some
764 * physical item (port for example) used by a netdevice.
766 struct netdev_phys_item_id {
767 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
768 unsigned char id_len;
771 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
772 struct netdev_phys_item_id *b)
774 return a->id_len == b->id_len &&
775 memcmp(a->id, b->id, a->id_len) == 0;
778 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
779 struct sk_buff *skb);
781 /* These structures hold the attributes of qdisc and classifiers
782 * that are being passed to the netdevice through the setup_tc op.
790 struct tc_cls_u32_offload;
792 struct tc_to_netdev {
796 struct tc_cls_u32_offload *cls_u32;
797 struct tc_cls_flower_offload *cls_flower;
803 * This structure defines the management hooks for network devices.
804 * The following hooks can be defined; unless noted otherwise, they are
805 * optional and can be filled with a null pointer.
807 * int (*ndo_init)(struct net_device *dev);
808 * This function is called once when a network device is registered.
809 * The network device can use this for any late stage initialization
810 * or semantic validation. It can fail with an error code which will
811 * be propagated back to register_netdev.
813 * void (*ndo_uninit)(struct net_device *dev);
814 * This function is called when device is unregistered or when registration
815 * fails. It is not called if init fails.
817 * int (*ndo_open)(struct net_device *dev);
818 * This function is called when a network device transitions to the up
821 * int (*ndo_stop)(struct net_device *dev);
822 * This function is called when a network device transitions to the down
825 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
826 * struct net_device *dev);
827 * Called when a packet needs to be transmitted.
828 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
829 * the queue before that can happen; it's for obsolete devices and weird
830 * corner cases, but the stack really does a non-trivial amount
831 * of useless work if you return NETDEV_TX_BUSY.
832 * Required; cannot be NULL.
834 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
835 * netdev_features_t features);
836 * Adjusts the requested feature flags according to device-specific
837 * constraints, and returns the resulting flags. Must not modify
840 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
841 * void *accel_priv, select_queue_fallback_t fallback);
842 * Called to decide which queue to use when device supports multiple
845 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
846 * This function is called to allow device receiver to make
847 * changes to configuration when multicast or promiscuous is enabled.
849 * void (*ndo_set_rx_mode)(struct net_device *dev);
850 * This function is called device changes address list filtering.
851 * If driver handles unicast address filtering, it should set
852 * IFF_UNICAST_FLT in its priv_flags.
854 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
855 * This function is called when the Media Access Control address
856 * needs to be changed. If this interface is not defined, the
857 * MAC address can not be changed.
859 * int (*ndo_validate_addr)(struct net_device *dev);
860 * Test if Media Access Control address is valid for the device.
862 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
863 * Called when a user requests an ioctl which can't be handled by
864 * the generic interface code. If not defined ioctls return
865 * not supported error code.
867 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
868 * Used to set network devices bus interface parameters. This interface
869 * is retained for legacy reasons; new devices should use the bus
870 * interface (PCI) for low level management.
872 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
873 * Called when a user wants to change the Maximum Transfer Unit
874 * of a device. If not defined, any request to change MTU will
875 * will return an error.
877 * void (*ndo_tx_timeout)(struct net_device *dev);
878 * Callback used when the transmitter has not made any progress
879 * for dev->watchdog ticks.
881 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
882 * struct rtnl_link_stats64 *storage);
883 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
884 * Called when a user wants to get the network device usage
885 * statistics. Drivers must do one of the following:
886 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
887 * rtnl_link_stats64 structure passed by the caller.
888 * 2. Define @ndo_get_stats to update a net_device_stats structure
889 * (which should normally be dev->stats) and return a pointer to
890 * it. The structure may be changed asynchronously only if each
891 * field is written atomically.
892 * 3. Update dev->stats asynchronously and atomically, and define
895 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
896 * If device supports VLAN filtering this function is called when a
897 * VLAN id is registered.
899 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
900 * If device supports VLAN filtering this function is called when a
901 * VLAN id is unregistered.
903 * void (*ndo_poll_controller)(struct net_device *dev);
905 * SR-IOV management functions.
906 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
907 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
908 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
910 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
911 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
912 * int (*ndo_get_vf_config)(struct net_device *dev,
913 * int vf, struct ifla_vf_info *ivf);
914 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
915 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
916 * struct nlattr *port[]);
918 * Enable or disable the VF ability to query its RSS Redirection Table and
919 * Hash Key. This is needed since on some devices VF share this information
920 * with PF and querying it may introduce a theoretical security risk.
921 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
922 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
923 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
924 * Called to setup 'tc' number of traffic classes in the net device. This
925 * is always called from the stack with the rtnl lock held and netif tx
926 * queues stopped. This allows the netdevice to perform queue management
929 * Fiber Channel over Ethernet (FCoE) offload functions.
930 * int (*ndo_fcoe_enable)(struct net_device *dev);
931 * Called when the FCoE protocol stack wants to start using LLD for FCoE
932 * so the underlying device can perform whatever needed configuration or
933 * initialization to support acceleration of FCoE traffic.
935 * int (*ndo_fcoe_disable)(struct net_device *dev);
936 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
937 * so the underlying device can perform whatever needed clean-ups to
938 * stop supporting acceleration of FCoE traffic.
940 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
941 * struct scatterlist *sgl, unsigned int sgc);
942 * Called when the FCoE Initiator wants to initialize an I/O that
943 * is a possible candidate for Direct Data Placement (DDP). The LLD can
944 * perform necessary setup and returns 1 to indicate the device is set up
945 * successfully to perform DDP on this I/O, otherwise this returns 0.
947 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
948 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
949 * indicated by the FC exchange id 'xid', so the underlying device can
950 * clean up and reuse resources for later DDP requests.
952 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
953 * struct scatterlist *sgl, unsigned int sgc);
954 * Called when the FCoE Target wants to initialize an I/O that
955 * is a possible candidate for Direct Data Placement (DDP). The LLD can
956 * perform necessary setup and returns 1 to indicate the device is set up
957 * successfully to perform DDP on this I/O, otherwise this returns 0.
959 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
960 * struct netdev_fcoe_hbainfo *hbainfo);
961 * Called when the FCoE Protocol stack wants information on the underlying
962 * device. This information is utilized by the FCoE protocol stack to
963 * register attributes with Fiber Channel management service as per the
964 * FC-GS Fabric Device Management Information(FDMI) specification.
966 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
967 * Called when the underlying device wants to override default World Wide
968 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
969 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
970 * protocol stack to use.
973 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
974 * u16 rxq_index, u32 flow_id);
975 * Set hardware filter for RFS. rxq_index is the target queue index;
976 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
977 * Return the filter ID on success, or a negative error code.
979 * Slave management functions (for bridge, bonding, etc).
980 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
981 * Called to make another netdev an underling.
983 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
984 * Called to release previously enslaved netdev.
986 * Feature/offload setting functions.
987 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
988 * Called to update device configuration to new features. Passed
989 * feature set might be less than what was returned by ndo_fix_features()).
990 * Must return >0 or -errno if it changed dev->features itself.
992 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
993 * struct net_device *dev,
994 * const unsigned char *addr, u16 vid, u16 flags)
995 * Adds an FDB entry to dev for addr.
996 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
997 * struct net_device *dev,
998 * const unsigned char *addr, u16 vid)
999 * Deletes the FDB entry from dev coresponding to addr.
1000 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1001 * struct net_device *dev, struct net_device *filter_dev,
1003 * Used to add FDB entries to dump requests. Implementers should add
1004 * entries to skb and update idx with the number of entries.
1006 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1008 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1009 * struct net_device *dev, u32 filter_mask,
1011 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1014 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1015 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1016 * which do not represent real hardware may define this to allow their
1017 * userspace components to manage their virtual carrier state. Devices
1018 * that determine carrier state from physical hardware properties (eg
1019 * network cables) or protocol-dependent mechanisms (eg
1020 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1022 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1023 * struct netdev_phys_item_id *ppid);
1024 * Called to get ID of physical port of this device. If driver does
1025 * not implement this, it is assumed that the hw is not able to have
1026 * multiple net devices on single physical port.
1028 * void (*ndo_add_vxlan_port)(struct net_device *dev,
1029 * sa_family_t sa_family, __be16 port);
1030 * Called by vxlan to notify a driver about the UDP port and socket
1031 * address family that vxlan is listening to. It is called only when
1032 * a new port starts listening. The operation is protected by the
1033 * vxlan_net->sock_lock.
1035 * void (*ndo_add_geneve_port)(struct net_device *dev,
1036 * sa_family_t sa_family, __be16 port);
1037 * Called by geneve to notify a driver about the UDP port and socket
1038 * address family that geneve is listnening to. It is called only when
1039 * a new port starts listening. The operation is protected by the
1040 * geneve_net->sock_lock.
1042 * void (*ndo_del_geneve_port)(struct net_device *dev,
1043 * sa_family_t sa_family, __be16 port);
1044 * Called by geneve to notify the driver about a UDP port and socket
1045 * address family that geneve is not listening to anymore. The operation
1046 * is protected by the geneve_net->sock_lock.
1048 * void (*ndo_del_vxlan_port)(struct net_device *dev,
1049 * sa_family_t sa_family, __be16 port);
1050 * Called by vxlan to notify the driver about a UDP port and socket
1051 * address family that vxlan is not listening to anymore. The operation
1052 * is protected by the vxlan_net->sock_lock.
1054 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1055 * struct net_device *dev)
1056 * Called by upper layer devices to accelerate switching or other
1057 * station functionality into hardware. 'pdev is the lowerdev
1058 * to use for the offload and 'dev' is the net device that will
1059 * back the offload. Returns a pointer to the private structure
1060 * the upper layer will maintain.
1061 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1062 * Called by upper layer device to delete the station created
1063 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1064 * the station and priv is the structure returned by the add
1066 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
1067 * struct net_device *dev,
1069 * Callback to use for xmit over the accelerated station. This
1070 * is used in place of ndo_start_xmit on accelerated net
1072 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1073 * struct net_device *dev
1074 * netdev_features_t features);
1075 * Called by core transmit path to determine if device is capable of
1076 * performing offload operations on a given packet. This is to give
1077 * the device an opportunity to implement any restrictions that cannot
1078 * be otherwise expressed by feature flags. The check is called with
1079 * the set of features that the stack has calculated and it returns
1080 * those the driver believes to be appropriate.
1081 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1082 * int queue_index, u32 maxrate);
1083 * Called when a user wants to set a max-rate limitation of specific
1085 * int (*ndo_get_iflink)(const struct net_device *dev);
1086 * Called to get the iflink value of this device.
1087 * void (*ndo_change_proto_down)(struct net_device *dev,
1089 * This function is used to pass protocol port error state information
1090 * to the switch driver. The switch driver can react to the proto_down
1091 * by doing a phys down on the associated switch port.
1092 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1093 * This function is used to get egress tunnel information for given skb.
1094 * This is useful for retrieving outer tunnel header parameters while
1096 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1097 * This function is used to specify the headroom that the skb must
1098 * consider when allocation skb during packet reception. Setting
1099 * appropriate rx headroom value allows avoiding skb head copy on
1100 * forward. Setting a negative value resets the rx headroom to the
1104 struct net_device_ops {
1105 int (*ndo_init)(struct net_device *dev);
1106 void (*ndo_uninit)(struct net_device *dev);
1107 int (*ndo_open)(struct net_device *dev);
1108 int (*ndo_stop)(struct net_device *dev);
1109 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1110 struct net_device *dev);
1111 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1112 struct net_device *dev,
1113 netdev_features_t features);
1114 u16 (*ndo_select_queue)(struct net_device *dev,
1115 struct sk_buff *skb,
1117 select_queue_fallback_t fallback);
1118 void (*ndo_change_rx_flags)(struct net_device *dev,
1120 void (*ndo_set_rx_mode)(struct net_device *dev);
1121 int (*ndo_set_mac_address)(struct net_device *dev,
1123 int (*ndo_validate_addr)(struct net_device *dev);
1124 int (*ndo_do_ioctl)(struct net_device *dev,
1125 struct ifreq *ifr, int cmd);
1126 int (*ndo_set_config)(struct net_device *dev,
1128 int (*ndo_change_mtu)(struct net_device *dev,
1130 int (*ndo_neigh_setup)(struct net_device *dev,
1131 struct neigh_parms *);
1132 void (*ndo_tx_timeout) (struct net_device *dev);
1134 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
1135 struct rtnl_link_stats64 *storage);
1136 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1138 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1139 __be16 proto, u16 vid);
1140 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1141 __be16 proto, u16 vid);
1142 #ifdef CONFIG_NET_POLL_CONTROLLER
1143 void (*ndo_poll_controller)(struct net_device *dev);
1144 int (*ndo_netpoll_setup)(struct net_device *dev,
1145 struct netpoll_info *info);
1146 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1148 #ifdef CONFIG_NET_RX_BUSY_POLL
1149 int (*ndo_busy_poll)(struct napi_struct *dev);
1151 int (*ndo_set_vf_mac)(struct net_device *dev,
1152 int queue, u8 *mac);
1153 int (*ndo_set_vf_vlan)(struct net_device *dev,
1154 int queue, u16 vlan, u8 qos);
1155 int (*ndo_set_vf_rate)(struct net_device *dev,
1156 int vf, int min_tx_rate,
1158 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1159 int vf, bool setting);
1160 int (*ndo_set_vf_trust)(struct net_device *dev,
1161 int vf, bool setting);
1162 int (*ndo_get_vf_config)(struct net_device *dev,
1164 struct ifla_vf_info *ivf);
1165 int (*ndo_set_vf_link_state)(struct net_device *dev,
1166 int vf, int link_state);
1167 int (*ndo_get_vf_stats)(struct net_device *dev,
1169 struct ifla_vf_stats
1171 int (*ndo_set_vf_port)(struct net_device *dev,
1173 struct nlattr *port[]);
1174 int (*ndo_get_vf_port)(struct net_device *dev,
1175 int vf, struct sk_buff *skb);
1176 int (*ndo_set_vf_guid)(struct net_device *dev,
1179 int (*ndo_set_vf_rss_query_en)(
1180 struct net_device *dev,
1181 int vf, bool setting);
1182 int (*ndo_setup_tc)(struct net_device *dev,
1185 struct tc_to_netdev *tc);
1186 #if IS_ENABLED(CONFIG_FCOE)
1187 int (*ndo_fcoe_enable)(struct net_device *dev);
1188 int (*ndo_fcoe_disable)(struct net_device *dev);
1189 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1191 struct scatterlist *sgl,
1193 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1195 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1197 struct scatterlist *sgl,
1199 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1200 struct netdev_fcoe_hbainfo *hbainfo);
1203 #if IS_ENABLED(CONFIG_LIBFCOE)
1204 #define NETDEV_FCOE_WWNN 0
1205 #define NETDEV_FCOE_WWPN 1
1206 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1207 u64 *wwn, int type);
1210 #ifdef CONFIG_RFS_ACCEL
1211 int (*ndo_rx_flow_steer)(struct net_device *dev,
1212 const struct sk_buff *skb,
1216 int (*ndo_add_slave)(struct net_device *dev,
1217 struct net_device *slave_dev);
1218 int (*ndo_del_slave)(struct net_device *dev,
1219 struct net_device *slave_dev);
1220 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1221 netdev_features_t features);
1222 int (*ndo_set_features)(struct net_device *dev,
1223 netdev_features_t features);
1224 int (*ndo_neigh_construct)(struct neighbour *n);
1225 void (*ndo_neigh_destroy)(struct neighbour *n);
1227 int (*ndo_fdb_add)(struct ndmsg *ndm,
1228 struct nlattr *tb[],
1229 struct net_device *dev,
1230 const unsigned char *addr,
1233 int (*ndo_fdb_del)(struct ndmsg *ndm,
1234 struct nlattr *tb[],
1235 struct net_device *dev,
1236 const unsigned char *addr,
1238 int (*ndo_fdb_dump)(struct sk_buff *skb,
1239 struct netlink_callback *cb,
1240 struct net_device *dev,
1241 struct net_device *filter_dev,
1244 int (*ndo_bridge_setlink)(struct net_device *dev,
1245 struct nlmsghdr *nlh,
1247 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1249 struct net_device *dev,
1252 int (*ndo_bridge_dellink)(struct net_device *dev,
1253 struct nlmsghdr *nlh,
1255 int (*ndo_change_carrier)(struct net_device *dev,
1257 int (*ndo_get_phys_port_id)(struct net_device *dev,
1258 struct netdev_phys_item_id *ppid);
1259 int (*ndo_get_phys_port_name)(struct net_device *dev,
1260 char *name, size_t len);
1261 void (*ndo_add_vxlan_port)(struct net_device *dev,
1262 sa_family_t sa_family,
1264 void (*ndo_del_vxlan_port)(struct net_device *dev,
1265 sa_family_t sa_family,
1267 void (*ndo_add_geneve_port)(struct net_device *dev,
1268 sa_family_t sa_family,
1270 void (*ndo_del_geneve_port)(struct net_device *dev,
1271 sa_family_t sa_family,
1273 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1274 struct net_device *dev);
1275 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1278 netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb,
1279 struct net_device *dev,
1281 int (*ndo_get_lock_subclass)(struct net_device *dev);
1282 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1285 int (*ndo_get_iflink)(const struct net_device *dev);
1286 int (*ndo_change_proto_down)(struct net_device *dev,
1288 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1289 struct sk_buff *skb);
1290 void (*ndo_set_rx_headroom)(struct net_device *dev,
1291 int needed_headroom);
1295 * enum net_device_priv_flags - &struct net_device priv_flags
1297 * These are the &struct net_device, they are only set internally
1298 * by drivers and used in the kernel. These flags are invisible to
1299 * userspace; this means that the order of these flags can change
1300 * during any kernel release.
1302 * You should have a pretty good reason to be extending these flags.
1304 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1305 * @IFF_EBRIDGE: Ethernet bridging device
1306 * @IFF_BONDING: bonding master or slave
1307 * @IFF_ISATAP: ISATAP interface (RFC4214)
1308 * @IFF_WAN_HDLC: WAN HDLC device
1309 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1311 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1312 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1313 * @IFF_MACVLAN_PORT: device used as macvlan port
1314 * @IFF_BRIDGE_PORT: device used as bridge port
1315 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1316 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1317 * @IFF_UNICAST_FLT: Supports unicast filtering
1318 * @IFF_TEAM_PORT: device used as team port
1319 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1320 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1321 * change when it's running
1322 * @IFF_MACVLAN: Macvlan device
1323 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1324 * underlying stacked devices
1325 * @IFF_IPVLAN_MASTER: IPvlan master device
1326 * @IFF_IPVLAN_SLAVE: IPvlan slave device
1327 * @IFF_L3MDEV_MASTER: device is an L3 master device
1328 * @IFF_NO_QUEUE: device can run without qdisc attached
1329 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1330 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1331 * @IFF_TEAM: device is a team device
1332 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1333 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1334 * entity (i.e. the master device for bridged veth)
1335 * @IFF_MACSEC: device is a MACsec device
1337 enum netdev_priv_flags {
1338 IFF_802_1Q_VLAN = 1<<0,
1342 IFF_WAN_HDLC = 1<<4,
1343 IFF_XMIT_DST_RELEASE = 1<<5,
1344 IFF_DONT_BRIDGE = 1<<6,
1345 IFF_DISABLE_NETPOLL = 1<<7,
1346 IFF_MACVLAN_PORT = 1<<8,
1347 IFF_BRIDGE_PORT = 1<<9,
1348 IFF_OVS_DATAPATH = 1<<10,
1349 IFF_TX_SKB_SHARING = 1<<11,
1350 IFF_UNICAST_FLT = 1<<12,
1351 IFF_TEAM_PORT = 1<<13,
1352 IFF_SUPP_NOFCS = 1<<14,
1353 IFF_LIVE_ADDR_CHANGE = 1<<15,
1354 IFF_MACVLAN = 1<<16,
1355 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1356 IFF_IPVLAN_MASTER = 1<<18,
1357 IFF_IPVLAN_SLAVE = 1<<19,
1358 IFF_L3MDEV_MASTER = 1<<20,
1359 IFF_NO_QUEUE = 1<<21,
1360 IFF_OPENVSWITCH = 1<<22,
1361 IFF_L3MDEV_SLAVE = 1<<23,
1363 IFF_RXFH_CONFIGURED = 1<<25,
1364 IFF_PHONY_HEADROOM = 1<<26,
1368 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1369 #define IFF_EBRIDGE IFF_EBRIDGE
1370 #define IFF_BONDING IFF_BONDING
1371 #define IFF_ISATAP IFF_ISATAP
1372 #define IFF_WAN_HDLC IFF_WAN_HDLC
1373 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1374 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1375 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1376 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1377 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1378 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1379 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1380 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1381 #define IFF_TEAM_PORT IFF_TEAM_PORT
1382 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1383 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1384 #define IFF_MACVLAN IFF_MACVLAN
1385 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1386 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1387 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1388 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1389 #define IFF_NO_QUEUE IFF_NO_QUEUE
1390 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1391 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1392 #define IFF_TEAM IFF_TEAM
1393 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1394 #define IFF_MACSEC IFF_MACSEC
1397 * struct net_device - The DEVICE structure.
1398 * Actually, this whole structure is a big mistake. It mixes I/O
1399 * data with strictly "high-level" data, and it has to know about
1400 * almost every data structure used in the INET module.
1402 * @name: This is the first field of the "visible" part of this structure
1403 * (i.e. as seen by users in the "Space.c" file). It is the name
1406 * @name_hlist: Device name hash chain, please keep it close to name[]
1407 * @ifalias: SNMP alias
1408 * @mem_end: Shared memory end
1409 * @mem_start: Shared memory start
1410 * @base_addr: Device I/O address
1411 * @irq: Device IRQ number
1413 * @carrier_changes: Stats to monitor carrier on<->off transitions
1415 * @state: Generic network queuing layer state, see netdev_state_t
1416 * @dev_list: The global list of network devices
1417 * @napi_list: List entry used for polling NAPI devices
1418 * @unreg_list: List entry when we are unregistering the
1419 * device; see the function unregister_netdev
1420 * @close_list: List entry used when we are closing the device
1421 * @ptype_all: Device-specific packet handlers for all protocols
1422 * @ptype_specific: Device-specific, protocol-specific packet handlers
1424 * @adj_list: Directly linked devices, like slaves for bonding
1425 * @all_adj_list: All linked devices, *including* neighbours
1426 * @features: Currently active device features
1427 * @hw_features: User-changeable features
1429 * @wanted_features: User-requested features
1430 * @vlan_features: Mask of features inheritable by VLAN devices
1432 * @hw_enc_features: Mask of features inherited by encapsulating devices
1433 * This field indicates what encapsulation
1434 * offloads the hardware is capable of doing,
1435 * and drivers will need to set them appropriately.
1437 * @mpls_features: Mask of features inheritable by MPLS
1439 * @ifindex: interface index
1440 * @group: The group the device belongs to
1442 * @stats: Statistics struct, which was left as a legacy, use
1443 * rtnl_link_stats64 instead
1445 * @rx_dropped: Dropped packets by core network,
1446 * do not use this in drivers
1447 * @tx_dropped: Dropped packets by core network,
1448 * do not use this in drivers
1449 * @rx_nohandler: nohandler dropped packets by core network on
1450 * inactive devices, do not use this in drivers
1452 * @wireless_handlers: List of functions to handle Wireless Extensions,
1454 * see <net/iw_handler.h> for details.
1455 * @wireless_data: Instance data managed by the core of wireless extensions
1457 * @netdev_ops: Includes several pointers to callbacks,
1458 * if one wants to override the ndo_*() functions
1459 * @ethtool_ops: Management operations
1460 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1461 * of Layer 2 headers.
1463 * @flags: Interface flags (a la BSD)
1464 * @priv_flags: Like 'flags' but invisible to userspace,
1465 * see if.h for the definitions
1466 * @gflags: Global flags ( kept as legacy )
1467 * @padded: How much padding added by alloc_netdev()
1468 * @operstate: RFC2863 operstate
1469 * @link_mode: Mapping policy to operstate
1470 * @if_port: Selectable AUI, TP, ...
1472 * @mtu: Interface MTU value
1473 * @type: Interface hardware type
1474 * @hard_header_len: Maximum hardware header length.
1476 * @needed_headroom: Extra headroom the hardware may need, but not in all
1477 * cases can this be guaranteed
1478 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1479 * cases can this be guaranteed. Some cases also use
1480 * LL_MAX_HEADER instead to allocate the skb
1482 * interface address info:
1484 * @perm_addr: Permanent hw address
1485 * @addr_assign_type: Hw address assignment type
1486 * @addr_len: Hardware address length
1487 * @neigh_priv_len; Used in neigh_alloc(),
1488 * initialized only in atm/clip.c
1489 * @dev_id: Used to differentiate devices that share
1490 * the same link layer address
1491 * @dev_port: Used to differentiate devices that share
1493 * @addr_list_lock: XXX: need comments on this one
1494 * @uc_promisc: Counter that indicates promiscuous mode
1495 * has been enabled due to the need to listen to
1496 * additional unicast addresses in a device that
1497 * does not implement ndo_set_rx_mode()
1498 * @uc: unicast mac addresses
1499 * @mc: multicast mac addresses
1500 * @dev_addrs: list of device hw addresses
1501 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1502 * @promiscuity: Number of times the NIC is told to work in
1503 * promiscuous mode; if it becomes 0 the NIC will
1504 * exit promiscuous mode
1505 * @allmulti: Counter, enables or disables allmulticast mode
1507 * @vlan_info: VLAN info
1508 * @dsa_ptr: dsa specific data
1509 * @tipc_ptr: TIPC specific data
1510 * @atalk_ptr: AppleTalk link
1511 * @ip_ptr: IPv4 specific data
1512 * @dn_ptr: DECnet specific data
1513 * @ip6_ptr: IPv6 specific data
1514 * @ax25_ptr: AX.25 specific data
1515 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1517 * @last_rx: Time of last Rx
1518 * @dev_addr: Hw address (before bcast,
1519 * because most packets are unicast)
1521 * @_rx: Array of RX queues
1522 * @num_rx_queues: Number of RX queues
1523 * allocated at register_netdev() time
1524 * @real_num_rx_queues: Number of RX queues currently active in device
1526 * @rx_handler: handler for received packets
1527 * @rx_handler_data: XXX: need comments on this one
1528 * @ingress_queue: XXX: need comments on this one
1529 * @broadcast: hw bcast address
1531 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1532 * indexed by RX queue number. Assigned by driver.
1533 * This must only be set if the ndo_rx_flow_steer
1534 * operation is defined
1535 * @index_hlist: Device index hash chain
1537 * @_tx: Array of TX queues
1538 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1539 * @real_num_tx_queues: Number of TX queues currently active in device
1540 * @qdisc: Root qdisc from userspace point of view
1541 * @tx_queue_len: Max frames per queue allowed
1542 * @tx_global_lock: XXX: need comments on this one
1544 * @xps_maps: XXX: need comments on this one
1546 * @offload_fwd_mark: Offload device fwding mark
1548 * @watchdog_timeo: Represents the timeout that is used by
1549 * the watchdog (see dev_watchdog())
1550 * @watchdog_timer: List of timers
1552 * @pcpu_refcnt: Number of references to this device
1553 * @todo_list: Delayed register/unregister
1554 * @link_watch_list: XXX: need comments on this one
1556 * @reg_state: Register/unregister state machine
1557 * @dismantle: Device is going to be freed
1558 * @rtnl_link_state: This enum represents the phases of creating
1561 * @destructor: Called from unregister,
1562 * can be used to call free_netdev
1563 * @npinfo: XXX: need comments on this one
1564 * @nd_net: Network namespace this network device is inside
1566 * @ml_priv: Mid-layer private
1567 * @lstats: Loopback statistics
1568 * @tstats: Tunnel statistics
1569 * @dstats: Dummy statistics
1570 * @vstats: Virtual ethernet statistics
1575 * @dev: Class/net/name entry
1576 * @sysfs_groups: Space for optional device, statistics and wireless
1579 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1580 * @rtnl_link_ops: Rtnl_link_ops
1582 * @gso_max_size: Maximum size of generic segmentation offload
1583 * @gso_max_segs: Maximum number of segments that can be passed to the
1586 * @dcbnl_ops: Data Center Bridging netlink ops
1587 * @num_tc: Number of traffic classes in the net device
1588 * @tc_to_txq: XXX: need comments on this one
1589 * @prio_tc_map XXX: need comments on this one
1591 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1593 * @priomap: XXX: need comments on this one
1594 * @phydev: Physical device may attach itself
1595 * for hardware timestamping
1597 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1598 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1600 * @proto_down: protocol port state information can be sent to the
1601 * switch driver and used to set the phys state of the
1604 * FIXME: cleanup struct net_device such that network protocol info
1609 char name[IFNAMSIZ];
1610 struct hlist_node name_hlist;
1613 * I/O specific fields
1614 * FIXME: Merge these and struct ifmap into one
1616 unsigned long mem_end;
1617 unsigned long mem_start;
1618 unsigned long base_addr;
1621 atomic_t carrier_changes;
1624 * Some hardware also needs these fields (state,dev_list,
1625 * napi_list,unreg_list,close_list) but they are not
1626 * part of the usual set specified in Space.c.
1629 unsigned long state;
1631 struct list_head dev_list;
1632 struct list_head napi_list;
1633 struct list_head unreg_list;
1634 struct list_head close_list;
1635 struct list_head ptype_all;
1636 struct list_head ptype_specific;
1639 struct list_head upper;
1640 struct list_head lower;
1644 struct list_head upper;
1645 struct list_head lower;
1648 netdev_features_t features;
1649 netdev_features_t hw_features;
1650 netdev_features_t wanted_features;
1651 netdev_features_t vlan_features;
1652 netdev_features_t hw_enc_features;
1653 netdev_features_t mpls_features;
1654 netdev_features_t gso_partial_features;
1659 struct net_device_stats stats;
1661 atomic_long_t rx_dropped;
1662 atomic_long_t tx_dropped;
1663 atomic_long_t rx_nohandler;
1665 #ifdef CONFIG_WIRELESS_EXT
1666 const struct iw_handler_def *wireless_handlers;
1667 struct iw_public_data *wireless_data;
1669 const struct net_device_ops *netdev_ops;
1670 const struct ethtool_ops *ethtool_ops;
1671 #ifdef CONFIG_NET_SWITCHDEV
1672 const struct switchdev_ops *switchdev_ops;
1674 #ifdef CONFIG_NET_L3_MASTER_DEV
1675 const struct l3mdev_ops *l3mdev_ops;
1678 const struct header_ops *header_ops;
1681 unsigned int priv_flags;
1683 unsigned short gflags;
1684 unsigned short padded;
1686 unsigned char operstate;
1687 unsigned char link_mode;
1689 unsigned char if_port;
1693 unsigned short type;
1694 unsigned short hard_header_len;
1696 unsigned short needed_headroom;
1697 unsigned short needed_tailroom;
1699 /* Interface address info. */
1700 unsigned char perm_addr[MAX_ADDR_LEN];
1701 unsigned char addr_assign_type;
1702 unsigned char addr_len;
1703 unsigned short neigh_priv_len;
1704 unsigned short dev_id;
1705 unsigned short dev_port;
1706 spinlock_t addr_list_lock;
1707 unsigned char name_assign_type;
1709 struct netdev_hw_addr_list uc;
1710 struct netdev_hw_addr_list mc;
1711 struct netdev_hw_addr_list dev_addrs;
1714 struct kset *queues_kset;
1716 unsigned int promiscuity;
1717 unsigned int allmulti;
1720 /* Protocol-specific pointers */
1722 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1723 struct vlan_info __rcu *vlan_info;
1725 #if IS_ENABLED(CONFIG_NET_DSA)
1726 struct dsa_switch_tree *dsa_ptr;
1728 #if IS_ENABLED(CONFIG_TIPC)
1729 struct tipc_bearer __rcu *tipc_ptr;
1732 struct in_device __rcu *ip_ptr;
1733 struct dn_dev __rcu *dn_ptr;
1734 struct inet6_dev __rcu *ip6_ptr;
1736 struct wireless_dev *ieee80211_ptr;
1737 struct wpan_dev *ieee802154_ptr;
1738 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1739 struct mpls_dev __rcu *mpls_ptr;
1743 * Cache lines mostly used on receive path (including eth_type_trans())
1745 unsigned long last_rx;
1747 /* Interface address info used in eth_type_trans() */
1748 unsigned char *dev_addr;
1751 struct netdev_rx_queue *_rx;
1753 unsigned int num_rx_queues;
1754 unsigned int real_num_rx_queues;
1757 unsigned long gro_flush_timeout;
1758 rx_handler_func_t __rcu *rx_handler;
1759 void __rcu *rx_handler_data;
1761 #ifdef CONFIG_NET_CLS_ACT
1762 struct tcf_proto __rcu *ingress_cl_list;
1764 struct netdev_queue __rcu *ingress_queue;
1765 #ifdef CONFIG_NETFILTER_INGRESS
1766 struct list_head nf_hooks_ingress;
1769 unsigned char broadcast[MAX_ADDR_LEN];
1770 #ifdef CONFIG_RFS_ACCEL
1771 struct cpu_rmap *rx_cpu_rmap;
1773 struct hlist_node index_hlist;
1776 * Cache lines mostly used on transmit path
1778 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1779 unsigned int num_tx_queues;
1780 unsigned int real_num_tx_queues;
1781 struct Qdisc *qdisc;
1782 unsigned long tx_queue_len;
1783 spinlock_t tx_global_lock;
1787 struct xps_dev_maps __rcu *xps_maps;
1789 #ifdef CONFIG_NET_CLS_ACT
1790 struct tcf_proto __rcu *egress_cl_list;
1792 #ifdef CONFIG_NET_SWITCHDEV
1793 u32 offload_fwd_mark;
1796 /* These may be needed for future network-power-down code. */
1797 struct timer_list watchdog_timer;
1799 int __percpu *pcpu_refcnt;
1800 struct list_head todo_list;
1802 struct list_head link_watch_list;
1804 enum { NETREG_UNINITIALIZED=0,
1805 NETREG_REGISTERED, /* completed register_netdevice */
1806 NETREG_UNREGISTERING, /* called unregister_netdevice */
1807 NETREG_UNREGISTERED, /* completed unregister todo */
1808 NETREG_RELEASED, /* called free_netdev */
1809 NETREG_DUMMY, /* dummy device for NAPI poll */
1815 RTNL_LINK_INITIALIZED,
1816 RTNL_LINK_INITIALIZING,
1817 } rtnl_link_state:16;
1819 void (*destructor)(struct net_device *dev);
1821 #ifdef CONFIG_NETPOLL
1822 struct netpoll_info __rcu *npinfo;
1825 possible_net_t nd_net;
1827 /* mid-layer private */
1830 struct pcpu_lstats __percpu *lstats;
1831 struct pcpu_sw_netstats __percpu *tstats;
1832 struct pcpu_dstats __percpu *dstats;
1833 struct pcpu_vstats __percpu *vstats;
1836 struct garp_port __rcu *garp_port;
1837 struct mrp_port __rcu *mrp_port;
1840 const struct attribute_group *sysfs_groups[4];
1841 const struct attribute_group *sysfs_rx_queue_group;
1843 const struct rtnl_link_ops *rtnl_link_ops;
1845 /* for setting kernel sock attribute on TCP connection setup */
1846 #define GSO_MAX_SIZE 65536
1847 unsigned int gso_max_size;
1848 #define GSO_MAX_SEGS 65535
1852 const struct dcbnl_rtnl_ops *dcbnl_ops;
1855 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1856 u8 prio_tc_map[TC_BITMASK + 1];
1858 #if IS_ENABLED(CONFIG_FCOE)
1859 unsigned int fcoe_ddp_xid;
1861 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1862 struct netprio_map __rcu *priomap;
1864 struct phy_device *phydev;
1865 struct lock_class_key *qdisc_tx_busylock;
1866 struct lock_class_key *qdisc_running_key;
1869 #define to_net_dev(d) container_of(d, struct net_device, dev)
1871 #define NETDEV_ALIGN 32
1874 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1876 return dev->prio_tc_map[prio & TC_BITMASK];
1880 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1882 if (tc >= dev->num_tc)
1885 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1890 void netdev_reset_tc(struct net_device *dev)
1893 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1894 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1898 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1900 if (tc >= dev->num_tc)
1903 dev->tc_to_txq[tc].count = count;
1904 dev->tc_to_txq[tc].offset = offset;
1909 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1911 if (num_tc > TC_MAX_QUEUE)
1914 dev->num_tc = num_tc;
1919 int netdev_get_num_tc(struct net_device *dev)
1925 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1928 return &dev->_tx[index];
1931 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
1932 const struct sk_buff *skb)
1934 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
1937 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1938 void (*f)(struct net_device *,
1939 struct netdev_queue *,
1945 for (i = 0; i < dev->num_tx_queues; i++)
1946 f(dev, &dev->_tx[i], arg);
1949 #define netdev_lockdep_set_classes(dev) \
1951 static struct lock_class_key qdisc_tx_busylock_key; \
1952 static struct lock_class_key qdisc_running_key; \
1953 static struct lock_class_key qdisc_xmit_lock_key; \
1954 static struct lock_class_key dev_addr_list_lock_key; \
1957 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
1958 (dev)->qdisc_running_key = &qdisc_running_key; \
1959 lockdep_set_class(&(dev)->addr_list_lock, \
1960 &dev_addr_list_lock_key); \
1961 for (i = 0; i < (dev)->num_tx_queues; i++) \
1962 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
1963 &qdisc_xmit_lock_key); \
1966 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1967 struct sk_buff *skb,
1970 /* returns the headroom that the master device needs to take in account
1971 * when forwarding to this dev
1973 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
1975 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
1978 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
1980 if (dev->netdev_ops->ndo_set_rx_headroom)
1981 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
1984 /* set the device rx headroom to the dev's default */
1985 static inline void netdev_reset_rx_headroom(struct net_device *dev)
1987 netdev_set_rx_headroom(dev, -1);
1991 * Net namespace inlines
1994 struct net *dev_net(const struct net_device *dev)
1996 return read_pnet(&dev->nd_net);
2000 void dev_net_set(struct net_device *dev, struct net *net)
2002 write_pnet(&dev->nd_net, net);
2005 static inline bool netdev_uses_dsa(struct net_device *dev)
2007 #if IS_ENABLED(CONFIG_NET_DSA)
2008 if (dev->dsa_ptr != NULL)
2009 return dsa_uses_tagged_protocol(dev->dsa_ptr);
2015 * netdev_priv - access network device private data
2016 * @dev: network device
2018 * Get network device private data
2020 static inline void *netdev_priv(const struct net_device *dev)
2022 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2025 /* Set the sysfs physical device reference for the network logical device
2026 * if set prior to registration will cause a symlink during initialization.
2028 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2030 /* Set the sysfs device type for the network logical device to allow
2031 * fine-grained identification of different network device types. For
2032 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2034 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2036 /* Default NAPI poll() weight
2037 * Device drivers are strongly advised to not use bigger value
2039 #define NAPI_POLL_WEIGHT 64
2042 * netif_napi_add - initialize a NAPI context
2043 * @dev: network device
2044 * @napi: NAPI context
2045 * @poll: polling function
2046 * @weight: default weight
2048 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2049 * *any* of the other NAPI-related functions.
2051 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2052 int (*poll)(struct napi_struct *, int), int weight);
2055 * netif_tx_napi_add - initialize a NAPI context
2056 * @dev: network device
2057 * @napi: NAPI context
2058 * @poll: polling function
2059 * @weight: default weight
2061 * This variant of netif_napi_add() should be used from drivers using NAPI
2062 * to exclusively poll a TX queue.
2063 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2065 static inline void netif_tx_napi_add(struct net_device *dev,
2066 struct napi_struct *napi,
2067 int (*poll)(struct napi_struct *, int),
2070 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2071 netif_napi_add(dev, napi, poll, weight);
2075 * netif_napi_del - remove a NAPI context
2076 * @napi: NAPI context
2078 * netif_napi_del() removes a NAPI context from the network device NAPI list
2080 void netif_napi_del(struct napi_struct *napi);
2082 struct napi_gro_cb {
2083 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2086 /* Length of frag0. */
2087 unsigned int frag0_len;
2089 /* This indicates where we are processing relative to skb->data. */
2092 /* This is non-zero if the packet cannot be merged with the new skb. */
2095 /* Save the IP ID here and check when we get to the transport layer */
2098 /* Number of segments aggregated. */
2101 /* Start offset for remote checksum offload */
2102 u16 gro_remcsum_start;
2104 /* jiffies when first packet was created/queued */
2107 /* Used in ipv6_gro_receive() and foo-over-udp */
2110 /* This is non-zero if the packet may be of the same flow. */
2113 /* Used in tunnel GRO receive */
2116 /* GRO checksum is valid */
2119 /* Number of checksums via CHECKSUM_UNNECESSARY */
2124 #define NAPI_GRO_FREE 1
2125 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2127 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2130 /* Used in GRE, set in fou/gue_gro_receive */
2133 /* Used to determine if flush_id can be ignored */
2138 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2141 /* used in skb_gro_receive() slow path */
2142 struct sk_buff *last;
2145 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2147 struct packet_type {
2148 __be16 type; /* This is really htons(ether_type). */
2149 struct net_device *dev; /* NULL is wildcarded here */
2150 int (*func) (struct sk_buff *,
2151 struct net_device *,
2152 struct packet_type *,
2153 struct net_device *);
2154 bool (*id_match)(struct packet_type *ptype,
2156 void *af_packet_priv;
2157 struct list_head list;
2160 struct offload_callbacks {
2161 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2162 netdev_features_t features);
2163 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2164 struct sk_buff *skb);
2165 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2168 struct packet_offload {
2169 __be16 type; /* This is really htons(ether_type). */
2171 struct offload_callbacks callbacks;
2172 struct list_head list;
2175 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2176 struct pcpu_sw_netstats {
2181 struct u64_stats_sync syncp;
2184 #define __netdev_alloc_pcpu_stats(type, gfp) \
2186 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2189 for_each_possible_cpu(__cpu) { \
2190 typeof(type) *stat; \
2191 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2192 u64_stats_init(&stat->syncp); \
2198 #define netdev_alloc_pcpu_stats(type) \
2199 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2201 enum netdev_lag_tx_type {
2202 NETDEV_LAG_TX_TYPE_UNKNOWN,
2203 NETDEV_LAG_TX_TYPE_RANDOM,
2204 NETDEV_LAG_TX_TYPE_BROADCAST,
2205 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2206 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2207 NETDEV_LAG_TX_TYPE_HASH,
2210 struct netdev_lag_upper_info {
2211 enum netdev_lag_tx_type tx_type;
2214 struct netdev_lag_lower_state_info {
2219 #include <linux/notifier.h>
2221 /* netdevice notifier chain. Please remember to update the rtnetlink
2222 * notification exclusion list in rtnetlink_event() when adding new
2225 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2226 #define NETDEV_DOWN 0x0002
2227 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2228 detected a hardware crash and restarted
2229 - we can use this eg to kick tcp sessions
2231 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2232 #define NETDEV_REGISTER 0x0005
2233 #define NETDEV_UNREGISTER 0x0006
2234 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2235 #define NETDEV_CHANGEADDR 0x0008
2236 #define NETDEV_GOING_DOWN 0x0009
2237 #define NETDEV_CHANGENAME 0x000A
2238 #define NETDEV_FEAT_CHANGE 0x000B
2239 #define NETDEV_BONDING_FAILOVER 0x000C
2240 #define NETDEV_PRE_UP 0x000D
2241 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2242 #define NETDEV_POST_TYPE_CHANGE 0x000F
2243 #define NETDEV_POST_INIT 0x0010
2244 #define NETDEV_UNREGISTER_FINAL 0x0011
2245 #define NETDEV_RELEASE 0x0012
2246 #define NETDEV_NOTIFY_PEERS 0x0013
2247 #define NETDEV_JOIN 0x0014
2248 #define NETDEV_CHANGEUPPER 0x0015
2249 #define NETDEV_RESEND_IGMP 0x0016
2250 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2251 #define NETDEV_CHANGEINFODATA 0x0018
2252 #define NETDEV_BONDING_INFO 0x0019
2253 #define NETDEV_PRECHANGEUPPER 0x001A
2254 #define NETDEV_CHANGELOWERSTATE 0x001B
2255 #define NETDEV_OFFLOAD_PUSH_VXLAN 0x001C
2256 #define NETDEV_OFFLOAD_PUSH_GENEVE 0x001D
2258 int register_netdevice_notifier(struct notifier_block *nb);
2259 int unregister_netdevice_notifier(struct notifier_block *nb);
2261 struct netdev_notifier_info {
2262 struct net_device *dev;
2265 struct netdev_notifier_change_info {
2266 struct netdev_notifier_info info; /* must be first */
2267 unsigned int flags_changed;
2270 struct netdev_notifier_changeupper_info {
2271 struct netdev_notifier_info info; /* must be first */
2272 struct net_device *upper_dev; /* new upper dev */
2273 bool master; /* is upper dev master */
2274 bool linking; /* is the notification for link or unlink */
2275 void *upper_info; /* upper dev info */
2278 struct netdev_notifier_changelowerstate_info {
2279 struct netdev_notifier_info info; /* must be first */
2280 void *lower_state_info; /* is lower dev state */
2283 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2284 struct net_device *dev)
2289 static inline struct net_device *
2290 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2295 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2298 extern rwlock_t dev_base_lock; /* Device list lock */
2300 #define for_each_netdev(net, d) \
2301 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2302 #define for_each_netdev_reverse(net, d) \
2303 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2304 #define for_each_netdev_rcu(net, d) \
2305 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2306 #define for_each_netdev_safe(net, d, n) \
2307 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2308 #define for_each_netdev_continue(net, d) \
2309 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2310 #define for_each_netdev_continue_rcu(net, d) \
2311 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2312 #define for_each_netdev_in_bond_rcu(bond, slave) \
2313 for_each_netdev_rcu(&init_net, slave) \
2314 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2315 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2317 static inline struct net_device *next_net_device(struct net_device *dev)
2319 struct list_head *lh;
2323 lh = dev->dev_list.next;
2324 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2327 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2329 struct list_head *lh;
2333 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2334 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2337 static inline struct net_device *first_net_device(struct net *net)
2339 return list_empty(&net->dev_base_head) ? NULL :
2340 net_device_entry(net->dev_base_head.next);
2343 static inline struct net_device *first_net_device_rcu(struct net *net)
2345 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2347 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2350 int netdev_boot_setup_check(struct net_device *dev);
2351 unsigned long netdev_boot_base(const char *prefix, int unit);
2352 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2353 const char *hwaddr);
2354 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2355 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2356 void dev_add_pack(struct packet_type *pt);
2357 void dev_remove_pack(struct packet_type *pt);
2358 void __dev_remove_pack(struct packet_type *pt);
2359 void dev_add_offload(struct packet_offload *po);
2360 void dev_remove_offload(struct packet_offload *po);
2362 int dev_get_iflink(const struct net_device *dev);
2363 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2364 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2365 unsigned short mask);
2366 struct net_device *dev_get_by_name(struct net *net, const char *name);
2367 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2368 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2369 int dev_alloc_name(struct net_device *dev, const char *name);
2370 int dev_open(struct net_device *dev);
2371 int dev_close(struct net_device *dev);
2372 int dev_close_many(struct list_head *head, bool unlink);
2373 void dev_disable_lro(struct net_device *dev);
2374 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2375 int dev_queue_xmit(struct sk_buff *skb);
2376 int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2377 int register_netdevice(struct net_device *dev);
2378 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2379 void unregister_netdevice_many(struct list_head *head);
2380 static inline void unregister_netdevice(struct net_device *dev)
2382 unregister_netdevice_queue(dev, NULL);
2385 int netdev_refcnt_read(const struct net_device *dev);
2386 void free_netdev(struct net_device *dev);
2387 void netdev_freemem(struct net_device *dev);
2388 void synchronize_net(void);
2389 int init_dummy_netdev(struct net_device *dev);
2391 DECLARE_PER_CPU(int, xmit_recursion);
2392 #define XMIT_RECURSION_LIMIT 10
2394 static inline int dev_recursion_level(void)
2396 return this_cpu_read(xmit_recursion);
2399 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2400 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2401 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2402 int netdev_get_name(struct net *net, char *name, int ifindex);
2403 int dev_restart(struct net_device *dev);
2404 int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2406 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2408 return NAPI_GRO_CB(skb)->data_offset;
2411 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2413 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2416 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2418 NAPI_GRO_CB(skb)->data_offset += len;
2421 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2422 unsigned int offset)
2424 return NAPI_GRO_CB(skb)->frag0 + offset;
2427 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2429 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2432 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2433 unsigned int offset)
2435 if (!pskb_may_pull(skb, hlen))
2438 NAPI_GRO_CB(skb)->frag0 = NULL;
2439 NAPI_GRO_CB(skb)->frag0_len = 0;
2440 return skb->data + offset;
2443 static inline void *skb_gro_network_header(struct sk_buff *skb)
2445 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2446 skb_network_offset(skb);
2449 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2450 const void *start, unsigned int len)
2452 if (NAPI_GRO_CB(skb)->csum_valid)
2453 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2454 csum_partial(start, len, 0));
2457 /* GRO checksum functions. These are logical equivalents of the normal
2458 * checksum functions (in skbuff.h) except that they operate on the GRO
2459 * offsets and fields in sk_buff.
2462 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2464 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2466 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2469 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2473 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2474 skb_checksum_start_offset(skb) <
2475 skb_gro_offset(skb)) &&
2476 !skb_at_gro_remcsum_start(skb) &&
2477 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2478 (!zero_okay || check));
2481 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2484 if (NAPI_GRO_CB(skb)->csum_valid &&
2485 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2488 NAPI_GRO_CB(skb)->csum = psum;
2490 return __skb_gro_checksum_complete(skb);
2493 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2495 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2496 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2497 NAPI_GRO_CB(skb)->csum_cnt--;
2499 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2500 * verified a new top level checksum or an encapsulated one
2501 * during GRO. This saves work if we fallback to normal path.
2503 __skb_incr_checksum_unnecessary(skb);
2507 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2510 __sum16 __ret = 0; \
2511 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2512 __ret = __skb_gro_checksum_validate_complete(skb, \
2513 compute_pseudo(skb, proto)); \
2515 __skb_mark_checksum_bad(skb); \
2517 skb_gro_incr_csum_unnecessary(skb); \
2521 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2522 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2524 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2526 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2528 #define skb_gro_checksum_simple_validate(skb) \
2529 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2531 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2533 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2534 !NAPI_GRO_CB(skb)->csum_valid);
2537 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2538 __sum16 check, __wsum pseudo)
2540 NAPI_GRO_CB(skb)->csum = ~pseudo;
2541 NAPI_GRO_CB(skb)->csum_valid = 1;
2544 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2546 if (__skb_gro_checksum_convert_check(skb)) \
2547 __skb_gro_checksum_convert(skb, check, \
2548 compute_pseudo(skb, proto)); \
2551 struct gro_remcsum {
2556 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2562 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2563 unsigned int off, size_t hdrlen,
2564 int start, int offset,
2565 struct gro_remcsum *grc,
2569 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2571 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2574 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2578 ptr = skb_gro_header_fast(skb, off);
2579 if (skb_gro_header_hard(skb, off + plen)) {
2580 ptr = skb_gro_header_slow(skb, off + plen, off);
2585 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2588 /* Adjust skb->csum since we changed the packet */
2589 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2591 grc->offset = off + hdrlen + offset;
2597 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2598 struct gro_remcsum *grc)
2601 size_t plen = grc->offset + sizeof(u16);
2606 ptr = skb_gro_header_fast(skb, grc->offset);
2607 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2608 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2613 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2616 struct skb_csum_offl_spec {
2630 bool __skb_csum_offload_chk(struct sk_buff *skb,
2631 const struct skb_csum_offl_spec *spec,
2632 bool *csum_encapped,
2635 static inline bool skb_csum_offload_chk(struct sk_buff *skb,
2636 const struct skb_csum_offl_spec *spec,
2637 bool *csum_encapped,
2640 if (skb->ip_summed != CHECKSUM_PARTIAL)
2643 return __skb_csum_offload_chk(skb, spec, csum_encapped, csum_help);
2646 static inline bool skb_csum_offload_chk_help(struct sk_buff *skb,
2647 const struct skb_csum_offl_spec *spec)
2651 return skb_csum_offload_chk(skb, spec, &csum_encapped, true);
2654 static inline bool skb_csum_off_chk_help_cmn(struct sk_buff *skb)
2656 static const struct skb_csum_offl_spec csum_offl_spec = {
2658 .ip_options_okay = 1,
2665 return skb_csum_offload_chk_help(skb, &csum_offl_spec);
2668 static inline bool skb_csum_off_chk_help_cmn_v4_only(struct sk_buff *skb)
2670 static const struct skb_csum_offl_spec csum_offl_spec = {
2672 .ip_options_okay = 1,
2678 return skb_csum_offload_chk_help(skb, &csum_offl_spec);
2681 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2682 unsigned short type,
2683 const void *daddr, const void *saddr,
2686 if (!dev->header_ops || !dev->header_ops->create)
2689 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2692 static inline int dev_parse_header(const struct sk_buff *skb,
2693 unsigned char *haddr)
2695 const struct net_device *dev = skb->dev;
2697 if (!dev->header_ops || !dev->header_ops->parse)
2699 return dev->header_ops->parse(skb, haddr);
2702 /* ll_header must have at least hard_header_len allocated */
2703 static inline bool dev_validate_header(const struct net_device *dev,
2704 char *ll_header, int len)
2706 if (likely(len >= dev->hard_header_len))
2709 if (capable(CAP_SYS_RAWIO)) {
2710 memset(ll_header + len, 0, dev->hard_header_len - len);
2714 if (dev->header_ops && dev->header_ops->validate)
2715 return dev->header_ops->validate(ll_header, len);
2720 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2721 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2722 static inline int unregister_gifconf(unsigned int family)
2724 return register_gifconf(family, NULL);
2727 #ifdef CONFIG_NET_FLOW_LIMIT
2728 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2729 struct sd_flow_limit {
2731 unsigned int num_buckets;
2732 unsigned int history_head;
2733 u16 history[FLOW_LIMIT_HISTORY];
2737 extern int netdev_flow_limit_table_len;
2738 #endif /* CONFIG_NET_FLOW_LIMIT */
2741 * Incoming packets are placed on per-CPU queues
2743 struct softnet_data {
2744 struct list_head poll_list;
2745 struct sk_buff_head process_queue;
2748 unsigned int processed;
2749 unsigned int time_squeeze;
2750 unsigned int received_rps;
2752 struct softnet_data *rps_ipi_list;
2754 #ifdef CONFIG_NET_FLOW_LIMIT
2755 struct sd_flow_limit __rcu *flow_limit;
2757 struct Qdisc *output_queue;
2758 struct Qdisc **output_queue_tailp;
2759 struct sk_buff *completion_queue;
2762 /* input_queue_head should be written by cpu owning this struct,
2763 * and only read by other cpus. Worth using a cache line.
2765 unsigned int input_queue_head ____cacheline_aligned_in_smp;
2767 /* Elements below can be accessed between CPUs for RPS/RFS */
2768 struct call_single_data csd ____cacheline_aligned_in_smp;
2769 struct softnet_data *rps_ipi_next;
2771 unsigned int input_queue_tail;
2773 unsigned int dropped;
2774 struct sk_buff_head input_pkt_queue;
2775 struct napi_struct backlog;
2779 static inline void input_queue_head_incr(struct softnet_data *sd)
2782 sd->input_queue_head++;
2786 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2787 unsigned int *qtail)
2790 *qtail = ++sd->input_queue_tail;
2794 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2796 void __netif_schedule(struct Qdisc *q);
2797 void netif_schedule_queue(struct netdev_queue *txq);
2799 static inline void netif_tx_schedule_all(struct net_device *dev)
2803 for (i = 0; i < dev->num_tx_queues; i++)
2804 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2807 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2809 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2813 * netif_start_queue - allow transmit
2814 * @dev: network device
2816 * Allow upper layers to call the device hard_start_xmit routine.
2818 static inline void netif_start_queue(struct net_device *dev)
2820 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2823 static inline void netif_tx_start_all_queues(struct net_device *dev)
2827 for (i = 0; i < dev->num_tx_queues; i++) {
2828 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2829 netif_tx_start_queue(txq);
2833 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2836 * netif_wake_queue - restart transmit
2837 * @dev: network device
2839 * Allow upper layers to call the device hard_start_xmit routine.
2840 * Used for flow control when transmit resources are available.
2842 static inline void netif_wake_queue(struct net_device *dev)
2844 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2847 static inline void netif_tx_wake_all_queues(struct net_device *dev)
2851 for (i = 0; i < dev->num_tx_queues; i++) {
2852 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2853 netif_tx_wake_queue(txq);
2857 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2859 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2863 * netif_stop_queue - stop transmitted packets
2864 * @dev: network device
2866 * Stop upper layers calling the device hard_start_xmit routine.
2867 * Used for flow control when transmit resources are unavailable.
2869 static inline void netif_stop_queue(struct net_device *dev)
2871 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2874 void netif_tx_stop_all_queues(struct net_device *dev);
2876 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2878 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2882 * netif_queue_stopped - test if transmit queue is flowblocked
2883 * @dev: network device
2885 * Test if transmit queue on device is currently unable to send.
2887 static inline bool netif_queue_stopped(const struct net_device *dev)
2889 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2892 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2894 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2898 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2900 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2904 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2906 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2910 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2911 * @dev_queue: pointer to transmit queue
2913 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2914 * to give appropriate hint to the CPU.
2916 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2919 prefetchw(&dev_queue->dql.num_queued);
2924 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2925 * @dev_queue: pointer to transmit queue
2927 * BQL enabled drivers might use this helper in their TX completion path,
2928 * to give appropriate hint to the CPU.
2930 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
2933 prefetchw(&dev_queue->dql.limit);
2937 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2941 dql_queued(&dev_queue->dql, bytes);
2943 if (likely(dql_avail(&dev_queue->dql) >= 0))
2946 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2949 * The XOFF flag must be set before checking the dql_avail below,
2950 * because in netdev_tx_completed_queue we update the dql_completed
2951 * before checking the XOFF flag.
2955 /* check again in case another CPU has just made room avail */
2956 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2957 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2962 * netdev_sent_queue - report the number of bytes queued to hardware
2963 * @dev: network device
2964 * @bytes: number of bytes queued to the hardware device queue
2966 * Report the number of bytes queued for sending/completion to the network
2967 * device hardware queue. @bytes should be a good approximation and should
2968 * exactly match netdev_completed_queue() @bytes
2970 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2972 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2975 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2976 unsigned int pkts, unsigned int bytes)
2979 if (unlikely(!bytes))
2982 dql_completed(&dev_queue->dql, bytes);
2985 * Without the memory barrier there is a small possiblity that
2986 * netdev_tx_sent_queue will miss the update and cause the queue to
2987 * be stopped forever
2991 if (dql_avail(&dev_queue->dql) < 0)
2994 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2995 netif_schedule_queue(dev_queue);
3000 * netdev_completed_queue - report bytes and packets completed by device
3001 * @dev: network device
3002 * @pkts: actual number of packets sent over the medium
3003 * @bytes: actual number of bytes sent over the medium
3005 * Report the number of bytes and packets transmitted by the network device
3006 * hardware queue over the physical medium, @bytes must exactly match the
3007 * @bytes amount passed to netdev_sent_queue()
3009 static inline void netdev_completed_queue(struct net_device *dev,
3010 unsigned int pkts, unsigned int bytes)
3012 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3015 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3018 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3024 * netdev_reset_queue - reset the packets and bytes count of a network device
3025 * @dev_queue: network device
3027 * Reset the bytes and packet count of a network device and clear the
3028 * software flow control OFF bit for this network device
3030 static inline void netdev_reset_queue(struct net_device *dev_queue)
3032 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3036 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3037 * @dev: network device
3038 * @queue_index: given tx queue index
3040 * Returns 0 if given tx queue index >= number of device tx queues,
3041 * otherwise returns the originally passed tx queue index.
3043 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3045 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3046 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3047 dev->name, queue_index,
3048 dev->real_num_tx_queues);
3056 * netif_running - test if up
3057 * @dev: network device
3059 * Test if the device has been brought up.
3061 static inline bool netif_running(const struct net_device *dev)
3063 return test_bit(__LINK_STATE_START, &dev->state);
3067 * Routines to manage the subqueues on a device. We only need start,
3068 * stop, and a check if it's stopped. All other device management is
3069 * done at the overall netdevice level.
3070 * Also test the device if we're multiqueue.
3074 * netif_start_subqueue - allow sending packets on subqueue
3075 * @dev: network device
3076 * @queue_index: sub queue index
3078 * Start individual transmit queue of a device with multiple transmit queues.
3080 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3082 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3084 netif_tx_start_queue(txq);
3088 * netif_stop_subqueue - stop sending packets on subqueue
3089 * @dev: network device
3090 * @queue_index: sub queue index
3092 * Stop individual transmit queue of a device with multiple transmit queues.
3094 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3096 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3097 netif_tx_stop_queue(txq);
3101 * netif_subqueue_stopped - test status of subqueue
3102 * @dev: network device
3103 * @queue_index: sub queue index
3105 * Check individual transmit queue of a device with multiple transmit queues.
3107 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3110 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3112 return netif_tx_queue_stopped(txq);
3115 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3116 struct sk_buff *skb)
3118 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3121 void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
3124 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3127 static inline int netif_set_xps_queue(struct net_device *dev,
3128 const struct cpumask *mask,
3135 u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
3136 unsigned int num_tx_queues);
3139 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
3140 * as a distribution range limit for the returned value.
3142 static inline u16 skb_tx_hash(const struct net_device *dev,
3143 struct sk_buff *skb)
3145 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
3149 * netif_is_multiqueue - test if device has multiple transmit queues
3150 * @dev: network device
3152 * Check if device has multiple transmit queues
3154 static inline bool netif_is_multiqueue(const struct net_device *dev)
3156 return dev->num_tx_queues > 1;
3159 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3162 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3164 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3172 static inline unsigned int get_netdev_rx_queue_index(
3173 struct netdev_rx_queue *queue)
3175 struct net_device *dev = queue->dev;
3176 int index = queue - dev->_rx;
3178 BUG_ON(index >= dev->num_rx_queues);
3183 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3184 int netif_get_num_default_rss_queues(void);
3186 enum skb_free_reason {
3187 SKB_REASON_CONSUMED,
3191 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3192 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3195 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3196 * interrupt context or with hardware interrupts being disabled.
3197 * (in_irq() || irqs_disabled())
3199 * We provide four helpers that can be used in following contexts :
3201 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3202 * replacing kfree_skb(skb)
3204 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3205 * Typically used in place of consume_skb(skb) in TX completion path
3207 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3208 * replacing kfree_skb(skb)
3210 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3211 * and consumed a packet. Used in place of consume_skb(skb)
3213 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3215 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3218 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3220 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3223 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3225 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3228 static inline void dev_consume_skb_any(struct sk_buff *skb)
3230 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3233 int netif_rx(struct sk_buff *skb);
3234 int netif_rx_ni(struct sk_buff *skb);
3235 int netif_receive_skb(struct sk_buff *skb);
3236 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3237 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3238 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3239 gro_result_t napi_gro_frags(struct napi_struct *napi);
3240 struct packet_offload *gro_find_receive_by_type(__be16 type);
3241 struct packet_offload *gro_find_complete_by_type(__be16 type);
3243 static inline void napi_free_frags(struct napi_struct *napi)
3245 kfree_skb(napi->skb);
3249 int netdev_rx_handler_register(struct net_device *dev,
3250 rx_handler_func_t *rx_handler,
3251 void *rx_handler_data);
3252 void netdev_rx_handler_unregister(struct net_device *dev);
3254 bool dev_valid_name(const char *name);
3255 int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
3256 int dev_ethtool(struct net *net, struct ifreq *);
3257 unsigned int dev_get_flags(const struct net_device *);
3258 int __dev_change_flags(struct net_device *, unsigned int flags);
3259 int dev_change_flags(struct net_device *, unsigned int);
3260 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3261 unsigned int gchanges);
3262 int dev_change_name(struct net_device *, const char *);
3263 int dev_set_alias(struct net_device *, const char *, size_t);
3264 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3265 int dev_set_mtu(struct net_device *, int);
3266 void dev_set_group(struct net_device *, int);
3267 int dev_set_mac_address(struct net_device *, struct sockaddr *);
3268 int dev_change_carrier(struct net_device *, bool new_carrier);
3269 int dev_get_phys_port_id(struct net_device *dev,
3270 struct netdev_phys_item_id *ppid);
3271 int dev_get_phys_port_name(struct net_device *dev,
3272 char *name, size_t len);
3273 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3274 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
3275 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3276 struct netdev_queue *txq, int *ret);
3277 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3278 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3279 bool is_skb_forwardable(const struct net_device *dev,
3280 const struct sk_buff *skb);
3282 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3284 extern int netdev_budget;
3286 /* Called by rtnetlink.c:rtnl_unlock() */
3287 void netdev_run_todo(void);
3290 * dev_put - release reference to device
3291 * @dev: network device
3293 * Release reference to device to allow it to be freed.
3295 static inline void dev_put(struct net_device *dev)
3297 this_cpu_dec(*dev->pcpu_refcnt);
3301 * dev_hold - get reference to device
3302 * @dev: network device
3304 * Hold reference to device to keep it from being freed.
3306 static inline void dev_hold(struct net_device *dev)
3308 this_cpu_inc(*dev->pcpu_refcnt);
3311 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3312 * and _off may be called from IRQ context, but it is caller
3313 * who is responsible for serialization of these calls.
3315 * The name carrier is inappropriate, these functions should really be
3316 * called netif_lowerlayer_*() because they represent the state of any
3317 * kind of lower layer not just hardware media.
3320 void linkwatch_init_dev(struct net_device *dev);
3321 void linkwatch_fire_event(struct net_device *dev);
3322 void linkwatch_forget_dev(struct net_device *dev);
3325 * netif_carrier_ok - test if carrier present
3326 * @dev: network device
3328 * Check if carrier is present on device
3330 static inline bool netif_carrier_ok(const struct net_device *dev)
3332 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3335 unsigned long dev_trans_start(struct net_device *dev);
3337 void __netdev_watchdog_up(struct net_device *dev);
3339 void netif_carrier_on(struct net_device *dev);
3341 void netif_carrier_off(struct net_device *dev);
3344 * netif_dormant_on - mark device as dormant.
3345 * @dev: network device
3347 * Mark device as dormant (as per RFC2863).
3349 * The dormant state indicates that the relevant interface is not
3350 * actually in a condition to pass packets (i.e., it is not 'up') but is
3351 * in a "pending" state, waiting for some external event. For "on-
3352 * demand" interfaces, this new state identifies the situation where the
3353 * interface is waiting for events to place it in the up state.
3355 static inline void netif_dormant_on(struct net_device *dev)
3357 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3358 linkwatch_fire_event(dev);
3362 * netif_dormant_off - set device as not dormant.
3363 * @dev: network device
3365 * Device is not in dormant state.
3367 static inline void netif_dormant_off(struct net_device *dev)
3369 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3370 linkwatch_fire_event(dev);
3374 * netif_dormant - test if carrier present
3375 * @dev: network device
3377 * Check if carrier is present on device
3379 static inline bool netif_dormant(const struct net_device *dev)
3381 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3386 * netif_oper_up - test if device is operational
3387 * @dev: network device
3389 * Check if carrier is operational
3391 static inline bool netif_oper_up(const struct net_device *dev)
3393 return (dev->operstate == IF_OPER_UP ||
3394 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3398 * netif_device_present - is device available or removed
3399 * @dev: network device
3401 * Check if device has not been removed from system.
3403 static inline bool netif_device_present(struct net_device *dev)
3405 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3408 void netif_device_detach(struct net_device *dev);
3410 void netif_device_attach(struct net_device *dev);
3413 * Network interface message level settings
3417 NETIF_MSG_DRV = 0x0001,
3418 NETIF_MSG_PROBE = 0x0002,
3419 NETIF_MSG_LINK = 0x0004,
3420 NETIF_MSG_TIMER = 0x0008,
3421 NETIF_MSG_IFDOWN = 0x0010,
3422 NETIF_MSG_IFUP = 0x0020,
3423 NETIF_MSG_RX_ERR = 0x0040,
3424 NETIF_MSG_TX_ERR = 0x0080,
3425 NETIF_MSG_TX_QUEUED = 0x0100,
3426 NETIF_MSG_INTR = 0x0200,
3427 NETIF_MSG_TX_DONE = 0x0400,
3428 NETIF_MSG_RX_STATUS = 0x0800,
3429 NETIF_MSG_PKTDATA = 0x1000,
3430 NETIF_MSG_HW = 0x2000,
3431 NETIF_MSG_WOL = 0x4000,
3434 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3435 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3436 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3437 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3438 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3439 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3440 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3441 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3442 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3443 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3444 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3445 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3446 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3447 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3448 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3450 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3453 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3454 return default_msg_enable_bits;
3455 if (debug_value == 0) /* no output */
3457 /* set low N bits */
3458 return (1 << debug_value) - 1;
3461 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3463 spin_lock(&txq->_xmit_lock);
3464 txq->xmit_lock_owner = cpu;
3467 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3469 spin_lock_bh(&txq->_xmit_lock);
3470 txq->xmit_lock_owner = smp_processor_id();
3473 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3475 bool ok = spin_trylock(&txq->_xmit_lock);
3477 txq->xmit_lock_owner = smp_processor_id();
3481 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3483 txq->xmit_lock_owner = -1;
3484 spin_unlock(&txq->_xmit_lock);
3487 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3489 txq->xmit_lock_owner = -1;
3490 spin_unlock_bh(&txq->_xmit_lock);
3493 static inline void txq_trans_update(struct netdev_queue *txq)
3495 if (txq->xmit_lock_owner != -1)
3496 txq->trans_start = jiffies;
3499 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3500 static inline void netif_trans_update(struct net_device *dev)
3502 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3504 if (txq->trans_start != jiffies)
3505 txq->trans_start = jiffies;
3509 * netif_tx_lock - grab network device transmit lock
3510 * @dev: network device
3512 * Get network device transmit lock
3514 static inline void netif_tx_lock(struct net_device *dev)
3519 spin_lock(&dev->tx_global_lock);
3520 cpu = smp_processor_id();
3521 for (i = 0; i < dev->num_tx_queues; i++) {
3522 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3524 /* We are the only thread of execution doing a
3525 * freeze, but we have to grab the _xmit_lock in
3526 * order to synchronize with threads which are in
3527 * the ->hard_start_xmit() handler and already
3528 * checked the frozen bit.
3530 __netif_tx_lock(txq, cpu);
3531 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3532 __netif_tx_unlock(txq);
3536 static inline void netif_tx_lock_bh(struct net_device *dev)
3542 static inline void netif_tx_unlock(struct net_device *dev)
3546 for (i = 0; i < dev->num_tx_queues; i++) {
3547 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3549 /* No need to grab the _xmit_lock here. If the
3550 * queue is not stopped for another reason, we
3553 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3554 netif_schedule_queue(txq);
3556 spin_unlock(&dev->tx_global_lock);
3559 static inline void netif_tx_unlock_bh(struct net_device *dev)
3561 netif_tx_unlock(dev);
3565 #define HARD_TX_LOCK(dev, txq, cpu) { \
3566 if ((dev->features & NETIF_F_LLTX) == 0) { \
3567 __netif_tx_lock(txq, cpu); \
3571 #define HARD_TX_TRYLOCK(dev, txq) \
3572 (((dev->features & NETIF_F_LLTX) == 0) ? \
3573 __netif_tx_trylock(txq) : \
3576 #define HARD_TX_UNLOCK(dev, txq) { \
3577 if ((dev->features & NETIF_F_LLTX) == 0) { \
3578 __netif_tx_unlock(txq); \
3582 static inline void netif_tx_disable(struct net_device *dev)
3588 cpu = smp_processor_id();
3589 for (i = 0; i < dev->num_tx_queues; i++) {
3590 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3592 __netif_tx_lock(txq, cpu);
3593 netif_tx_stop_queue(txq);
3594 __netif_tx_unlock(txq);
3599 static inline void netif_addr_lock(struct net_device *dev)
3601 spin_lock(&dev->addr_list_lock);
3604 static inline void netif_addr_lock_nested(struct net_device *dev)
3606 int subclass = SINGLE_DEPTH_NESTING;
3608 if (dev->netdev_ops->ndo_get_lock_subclass)
3609 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3611 spin_lock_nested(&dev->addr_list_lock, subclass);
3614 static inline void netif_addr_lock_bh(struct net_device *dev)
3616 spin_lock_bh(&dev->addr_list_lock);
3619 static inline void netif_addr_unlock(struct net_device *dev)
3621 spin_unlock(&dev->addr_list_lock);
3624 static inline void netif_addr_unlock_bh(struct net_device *dev)
3626 spin_unlock_bh(&dev->addr_list_lock);
3630 * dev_addrs walker. Should be used only for read access. Call with
3631 * rcu_read_lock held.
3633 #define for_each_dev_addr(dev, ha) \
3634 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3636 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3638 void ether_setup(struct net_device *dev);
3640 /* Support for loadable net-drivers */
3641 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3642 unsigned char name_assign_type,
3643 void (*setup)(struct net_device *),
3644 unsigned int txqs, unsigned int rxqs);
3645 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3646 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3648 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3649 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3652 int register_netdev(struct net_device *dev);
3653 void unregister_netdev(struct net_device *dev);
3655 /* General hardware address lists handling functions */
3656 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3657 struct netdev_hw_addr_list *from_list, int addr_len);
3658 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3659 struct netdev_hw_addr_list *from_list, int addr_len);
3660 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3661 struct net_device *dev,
3662 int (*sync)(struct net_device *, const unsigned char *),
3663 int (*unsync)(struct net_device *,
3664 const unsigned char *));
3665 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3666 struct net_device *dev,
3667 int (*unsync)(struct net_device *,
3668 const unsigned char *));
3669 void __hw_addr_init(struct netdev_hw_addr_list *list);
3671 /* Functions used for device addresses handling */
3672 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3673 unsigned char addr_type);
3674 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3675 unsigned char addr_type);
3676 void dev_addr_flush(struct net_device *dev);
3677 int dev_addr_init(struct net_device *dev);
3679 /* Functions used for unicast addresses handling */
3680 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3681 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3682 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3683 int dev_uc_sync(struct net_device *to, struct net_device *from);
3684 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3685 void dev_uc_unsync(struct net_device *to, struct net_device *from);
3686 void dev_uc_flush(struct net_device *dev);
3687 void dev_uc_init(struct net_device *dev);
3690 * __dev_uc_sync - Synchonize device's unicast list
3691 * @dev: device to sync
3692 * @sync: function to call if address should be added
3693 * @unsync: function to call if address should be removed
3695 * Add newly added addresses to the interface, and release
3696 * addresses that have been deleted.
3698 static inline int __dev_uc_sync(struct net_device *dev,
3699 int (*sync)(struct net_device *,
3700 const unsigned char *),
3701 int (*unsync)(struct net_device *,
3702 const unsigned char *))
3704 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3708 * __dev_uc_unsync - Remove synchronized addresses from device
3709 * @dev: device to sync
3710 * @unsync: function to call if address should be removed
3712 * Remove all addresses that were added to the device by dev_uc_sync().
3714 static inline void __dev_uc_unsync(struct net_device *dev,
3715 int (*unsync)(struct net_device *,
3716 const unsigned char *))
3718 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3721 /* Functions used for multicast addresses handling */
3722 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3723 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3724 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3725 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3726 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3727 int dev_mc_sync(struct net_device *to, struct net_device *from);
3728 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3729 void dev_mc_unsync(struct net_device *to, struct net_device *from);
3730 void dev_mc_flush(struct net_device *dev);
3731 void dev_mc_init(struct net_device *dev);
3734 * __dev_mc_sync - Synchonize device's multicast list
3735 * @dev: device to sync
3736 * @sync: function to call if address should be added
3737 * @unsync: function to call if address should be removed
3739 * Add newly added addresses to the interface, and release
3740 * addresses that have been deleted.
3742 static inline int __dev_mc_sync(struct net_device *dev,
3743 int (*sync)(struct net_device *,
3744 const unsigned char *),
3745 int (*unsync)(struct net_device *,
3746 const unsigned char *))
3748 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3752 * __dev_mc_unsync - Remove synchronized addresses from device
3753 * @dev: device to sync
3754 * @unsync: function to call if address should be removed
3756 * Remove all addresses that were added to the device by dev_mc_sync().
3758 static inline void __dev_mc_unsync(struct net_device *dev,
3759 int (*unsync)(struct net_device *,
3760 const unsigned char *))
3762 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3765 /* Functions used for secondary unicast and multicast support */
3766 void dev_set_rx_mode(struct net_device *dev);
3767 void __dev_set_rx_mode(struct net_device *dev);
3768 int dev_set_promiscuity(struct net_device *dev, int inc);
3769 int dev_set_allmulti(struct net_device *dev, int inc);
3770 void netdev_state_change(struct net_device *dev);
3771 void netdev_notify_peers(struct net_device *dev);
3772 void netdev_features_change(struct net_device *dev);
3773 /* Load a device via the kmod */
3774 void dev_load(struct net *net, const char *name);
3775 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3776 struct rtnl_link_stats64 *storage);
3777 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3778 const struct net_device_stats *netdev_stats);
3780 extern int netdev_max_backlog;
3781 extern int netdev_tstamp_prequeue;
3782 extern int weight_p;
3784 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3785 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3786 struct list_head **iter);
3787 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3788 struct list_head **iter);
3790 /* iterate through upper list, must be called under RCU read lock */
3791 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3792 for (iter = &(dev)->adj_list.upper, \
3793 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3795 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3797 /* iterate through upper list, must be called under RCU read lock */
3798 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3799 for (iter = &(dev)->all_adj_list.upper, \
3800 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3802 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3804 void *netdev_lower_get_next_private(struct net_device *dev,
3805 struct list_head **iter);
3806 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3807 struct list_head **iter);
3809 #define netdev_for_each_lower_private(dev, priv, iter) \
3810 for (iter = (dev)->adj_list.lower.next, \
3811 priv = netdev_lower_get_next_private(dev, &(iter)); \
3813 priv = netdev_lower_get_next_private(dev, &(iter)))
3815 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3816 for (iter = &(dev)->adj_list.lower, \
3817 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3819 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3821 void *netdev_lower_get_next(struct net_device *dev,
3822 struct list_head **iter);
3823 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3824 for (iter = (dev)->adj_list.lower.next, \
3825 ldev = netdev_lower_get_next(dev, &(iter)); \
3827 ldev = netdev_lower_get_next(dev, &(iter)))
3829 void *netdev_adjacent_get_private(struct list_head *adj_list);
3830 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3831 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3832 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3833 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
3834 int netdev_master_upper_dev_link(struct net_device *dev,
3835 struct net_device *upper_dev,
3836 void *upper_priv, void *upper_info);
3837 void netdev_upper_dev_unlink(struct net_device *dev,
3838 struct net_device *upper_dev);
3839 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3840 void *netdev_lower_dev_get_private(struct net_device *dev,
3841 struct net_device *lower_dev);
3842 void netdev_lower_state_changed(struct net_device *lower_dev,
3843 void *lower_state_info);
3845 /* RSS keys are 40 or 52 bytes long */
3846 #define NETDEV_RSS_KEY_LEN 52
3847 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
3848 void netdev_rss_key_fill(void *buffer, size_t len);
3850 int dev_get_nest_level(struct net_device *dev,
3851 bool (*type_check)(const struct net_device *dev));
3852 int skb_checksum_help(struct sk_buff *skb);
3853 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
3854 netdev_features_t features, bool tx_path);
3855 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
3856 netdev_features_t features);
3858 struct netdev_bonding_info {
3863 struct netdev_notifier_bonding_info {
3864 struct netdev_notifier_info info; /* must be first */
3865 struct netdev_bonding_info bonding_info;
3868 void netdev_bonding_info_change(struct net_device *dev,
3869 struct netdev_bonding_info *bonding_info);
3872 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
3874 return __skb_gso_segment(skb, features, true);
3876 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3878 static inline bool can_checksum_protocol(netdev_features_t features,
3881 if (protocol == htons(ETH_P_FCOE))
3882 return !!(features & NETIF_F_FCOE_CRC);
3884 /* Assume this is an IP checksum (not SCTP CRC) */
3886 if (features & NETIF_F_HW_CSUM) {
3887 /* Can checksum everything */
3892 case htons(ETH_P_IP):
3893 return !!(features & NETIF_F_IP_CSUM);
3894 case htons(ETH_P_IPV6):
3895 return !!(features & NETIF_F_IPV6_CSUM);
3901 /* Map an ethertype into IP protocol if possible */
3902 static inline int eproto_to_ipproto(int eproto)
3905 case htons(ETH_P_IP):
3907 case htons(ETH_P_IPV6):
3908 return IPPROTO_IPV6;
3915 void netdev_rx_csum_fault(struct net_device *dev);
3917 static inline void netdev_rx_csum_fault(struct net_device *dev)
3921 /* rx skb timestamps */
3922 void net_enable_timestamp(void);
3923 void net_disable_timestamp(void);
3925 #ifdef CONFIG_PROC_FS
3926 int __init dev_proc_init(void);
3928 #define dev_proc_init() 0
3931 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3932 struct sk_buff *skb, struct net_device *dev,
3935 skb->xmit_more = more ? 1 : 0;
3936 return ops->ndo_start_xmit(skb, dev);
3939 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3940 struct netdev_queue *txq, bool more)
3942 const struct net_device_ops *ops = dev->netdev_ops;
3945 rc = __netdev_start_xmit(ops, skb, dev, more);
3946 if (rc == NETDEV_TX_OK)
3947 txq_trans_update(txq);
3952 int netdev_class_create_file_ns(struct class_attribute *class_attr,
3954 void netdev_class_remove_file_ns(struct class_attribute *class_attr,
3957 static inline int netdev_class_create_file(struct class_attribute *class_attr)
3959 return netdev_class_create_file_ns(class_attr, NULL);
3962 static inline void netdev_class_remove_file(struct class_attribute *class_attr)
3964 netdev_class_remove_file_ns(class_attr, NULL);
3967 extern struct kobj_ns_type_operations net_ns_type_operations;
3969 const char *netdev_drivername(const struct net_device *dev);
3971 void linkwatch_run_queue(void);
3973 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
3974 netdev_features_t f2)
3976 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
3977 if (f1 & NETIF_F_HW_CSUM)
3978 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
3980 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
3986 static inline netdev_features_t netdev_get_wanted_features(
3987 struct net_device *dev)
3989 return (dev->features & ~dev->hw_features) | dev->wanted_features;
3991 netdev_features_t netdev_increment_features(netdev_features_t all,
3992 netdev_features_t one, netdev_features_t mask);
3994 /* Allow TSO being used on stacked device :
3995 * Performing the GSO segmentation before last device
3996 * is a performance improvement.
3998 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
3999 netdev_features_t mask)
4001 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4004 int __netdev_update_features(struct net_device *dev);
4005 void netdev_update_features(struct net_device *dev);
4006 void netdev_change_features(struct net_device *dev);
4008 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4009 struct net_device *dev);
4011 netdev_features_t passthru_features_check(struct sk_buff *skb,
4012 struct net_device *dev,
4013 netdev_features_t features);
4014 netdev_features_t netif_skb_features(struct sk_buff *skb);
4016 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4018 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4020 /* check flags correspondence */
4021 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4022 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
4023 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4024 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4025 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4026 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4027 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4028 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4029 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4030 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4031 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4032 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4033 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4034 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4035 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4036 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4038 return (features & feature) == feature;
4041 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4043 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4044 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4047 static inline bool netif_needs_gso(struct sk_buff *skb,
4048 netdev_features_t features)
4050 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4051 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4052 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4055 static inline void netif_set_gso_max_size(struct net_device *dev,
4058 dev->gso_max_size = size;
4061 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4062 int pulled_hlen, u16 mac_offset,
4065 skb->protocol = protocol;
4066 skb->encapsulation = 1;
4067 skb_push(skb, pulled_hlen);
4068 skb_reset_transport_header(skb);
4069 skb->mac_header = mac_offset;
4070 skb->network_header = skb->mac_header + mac_len;
4071 skb->mac_len = mac_len;
4074 static inline bool netif_is_macsec(const struct net_device *dev)
4076 return dev->priv_flags & IFF_MACSEC;
4079 static inline bool netif_is_macvlan(const struct net_device *dev)
4081 return dev->priv_flags & IFF_MACVLAN;
4084 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4086 return dev->priv_flags & IFF_MACVLAN_PORT;
4089 static inline bool netif_is_ipvlan(const struct net_device *dev)
4091 return dev->priv_flags & IFF_IPVLAN_SLAVE;
4094 static inline bool netif_is_ipvlan_port(const struct net_device *dev)
4096 return dev->priv_flags & IFF_IPVLAN_MASTER;
4099 static inline bool netif_is_bond_master(const struct net_device *dev)
4101 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4104 static inline bool netif_is_bond_slave(const struct net_device *dev)
4106 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4109 static inline bool netif_supports_nofcs(struct net_device *dev)
4111 return dev->priv_flags & IFF_SUPP_NOFCS;
4114 static inline bool netif_is_l3_master(const struct net_device *dev)
4116 return dev->priv_flags & IFF_L3MDEV_MASTER;
4119 static inline bool netif_is_l3_slave(const struct net_device *dev)
4121 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4124 static inline bool netif_is_bridge_master(const struct net_device *dev)
4126 return dev->priv_flags & IFF_EBRIDGE;
4129 static inline bool netif_is_bridge_port(const struct net_device *dev)
4131 return dev->priv_flags & IFF_BRIDGE_PORT;
4134 static inline bool netif_is_ovs_master(const struct net_device *dev)
4136 return dev->priv_flags & IFF_OPENVSWITCH;
4139 static inline bool netif_is_team_master(const struct net_device *dev)
4141 return dev->priv_flags & IFF_TEAM;
4144 static inline bool netif_is_team_port(const struct net_device *dev)
4146 return dev->priv_flags & IFF_TEAM_PORT;
4149 static inline bool netif_is_lag_master(const struct net_device *dev)
4151 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4154 static inline bool netif_is_lag_port(const struct net_device *dev)
4156 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4159 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4161 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4164 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4165 static inline void netif_keep_dst(struct net_device *dev)
4167 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4170 extern struct pernet_operations __net_initdata loopback_net_ops;
4172 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4174 /* netdev_printk helpers, similar to dev_printk */
4176 static inline const char *netdev_name(const struct net_device *dev)
4178 if (!dev->name[0] || strchr(dev->name, '%'))
4179 return "(unnamed net_device)";
4183 static inline const char *netdev_reg_state(const struct net_device *dev)
4185 switch (dev->reg_state) {
4186 case NETREG_UNINITIALIZED: return " (uninitialized)";
4187 case NETREG_REGISTERED: return "";
4188 case NETREG_UNREGISTERING: return " (unregistering)";
4189 case NETREG_UNREGISTERED: return " (unregistered)";
4190 case NETREG_RELEASED: return " (released)";
4191 case NETREG_DUMMY: return " (dummy)";
4194 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4195 return " (unknown)";
4199 void netdev_printk(const char *level, const struct net_device *dev,
4200 const char *format, ...);
4202 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4204 void netdev_alert(const struct net_device *dev, const char *format, ...);
4206 void netdev_crit(const struct net_device *dev, const char *format, ...);
4208 void netdev_err(const struct net_device *dev, const char *format, ...);
4210 void netdev_warn(const struct net_device *dev, const char *format, ...);
4212 void netdev_notice(const struct net_device *dev, const char *format, ...);
4214 void netdev_info(const struct net_device *dev, const char *format, ...);
4216 #define MODULE_ALIAS_NETDEV(device) \
4217 MODULE_ALIAS("netdev-" device)
4219 #if defined(CONFIG_DYNAMIC_DEBUG)
4220 #define netdev_dbg(__dev, format, args...) \
4222 dynamic_netdev_dbg(__dev, format, ##args); \
4224 #elif defined(DEBUG)
4225 #define netdev_dbg(__dev, format, args...) \
4226 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4228 #define netdev_dbg(__dev, format, args...) \
4231 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4235 #if defined(VERBOSE_DEBUG)
4236 #define netdev_vdbg netdev_dbg
4239 #define netdev_vdbg(dev, format, args...) \
4242 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4248 * netdev_WARN() acts like dev_printk(), but with the key difference
4249 * of using a WARN/WARN_ON to get the message out, including the
4250 * file/line information and a backtrace.
4252 #define netdev_WARN(dev, format, args...) \
4253 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
4254 netdev_reg_state(dev), ##args)
4256 /* netif printk helpers, similar to netdev_printk */
4258 #define netif_printk(priv, type, level, dev, fmt, args...) \
4260 if (netif_msg_##type(priv)) \
4261 netdev_printk(level, (dev), fmt, ##args); \
4264 #define netif_level(level, priv, type, dev, fmt, args...) \
4266 if (netif_msg_##type(priv)) \
4267 netdev_##level(dev, fmt, ##args); \
4270 #define netif_emerg(priv, type, dev, fmt, args...) \
4271 netif_level(emerg, priv, type, dev, fmt, ##args)
4272 #define netif_alert(priv, type, dev, fmt, args...) \
4273 netif_level(alert, priv, type, dev, fmt, ##args)
4274 #define netif_crit(priv, type, dev, fmt, args...) \
4275 netif_level(crit, priv, type, dev, fmt, ##args)
4276 #define netif_err(priv, type, dev, fmt, args...) \
4277 netif_level(err, priv, type, dev, fmt, ##args)
4278 #define netif_warn(priv, type, dev, fmt, args...) \
4279 netif_level(warn, priv, type, dev, fmt, ##args)
4280 #define netif_notice(priv, type, dev, fmt, args...) \
4281 netif_level(notice, priv, type, dev, fmt, ##args)
4282 #define netif_info(priv, type, dev, fmt, args...) \
4283 netif_level(info, priv, type, dev, fmt, ##args)
4285 #if defined(CONFIG_DYNAMIC_DEBUG)
4286 #define netif_dbg(priv, type, netdev, format, args...) \
4288 if (netif_msg_##type(priv)) \
4289 dynamic_netdev_dbg(netdev, format, ##args); \
4291 #elif defined(DEBUG)
4292 #define netif_dbg(priv, type, dev, format, args...) \
4293 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4295 #define netif_dbg(priv, type, dev, format, args...) \
4298 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4303 #if defined(VERBOSE_DEBUG)
4304 #define netif_vdbg netif_dbg
4306 #define netif_vdbg(priv, type, dev, format, args...) \
4309 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4315 * The list of packet types we will receive (as opposed to discard)
4316 * and the routines to invoke.
4318 * Why 16. Because with 16 the only overlap we get on a hash of the
4319 * low nibble of the protocol value is RARP/SNAP/X.25.
4321 * NOTE: That is no longer true with the addition of VLAN tags. Not
4322 * sure which should go first, but I bet it won't make much
4323 * difference if we are running VLANs. The good news is that
4324 * this protocol won't be in the list unless compiled in, so
4325 * the average user (w/out VLANs) will not be adversely affected.
4341 #define PTYPE_HASH_SIZE (16)
4342 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4344 #endif /* _LINUX_NETDEVICE_H */