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>
45 #include <net/dcbnl.h>
47 #include <net/netprio_cgroup.h>
49 #include <linux/netdev_features.h>
50 #include <linux/neighbour.h>
51 #include <uapi/linux/netdevice.h>
52 #include <uapi/linux/if_bonding.h>
53 #include <uapi/linux/pkt_cls.h>
54 #include <linux/hashtable.h>
59 struct dsa_switch_tree;
63 /* 802.15.4 specific */
66 /* UDP Tunnel offloads */
67 struct udp_tunnel_info;
71 void netdev_set_default_ethtool_ops(struct net_device *dev,
72 const struct ethtool_ops *ops);
74 /* Backlog congestion levels */
75 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
76 #define NET_RX_DROP 1 /* packet dropped */
79 * Transmit return codes: transmit return codes originate from three different
82 * - qdisc return codes
83 * - driver transmit return codes
86 * Drivers are allowed to return any one of those in their hard_start_xmit()
87 * function. Real network devices commonly used with qdiscs should only return
88 * the driver transmit return codes though - when qdiscs are used, the actual
89 * transmission happens asynchronously, so the value is not propagated to
90 * higher layers. Virtual network devices transmit synchronously; in this case
91 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
92 * others are propagated to higher layers.
95 /* qdisc ->enqueue() return codes. */
96 #define NET_XMIT_SUCCESS 0x00
97 #define NET_XMIT_DROP 0x01 /* skb dropped */
98 #define NET_XMIT_CN 0x02 /* congestion notification */
99 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
101 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
102 * indicates that the device will soon be dropping packets, or already drops
103 * some packets of the same priority; prompting us to send less aggressively. */
104 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
105 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107 /* Driver transmit return codes */
108 #define NETDEV_TX_MASK 0xf0
111 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
112 NETDEV_TX_OK = 0x00, /* driver took care of packet */
113 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
115 typedef enum netdev_tx netdev_tx_t;
118 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
119 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
121 static inline bool dev_xmit_complete(int rc)
124 * Positive cases with an skb consumed by a driver:
125 * - successful transmission (rc == NETDEV_TX_OK)
126 * - error while transmitting (rc < 0)
127 * - error while queueing to a different device (rc & NET_XMIT_MASK)
129 if (likely(rc < NET_XMIT_MASK))
136 * Compute the worst-case header length according to the protocols
140 #if defined(CONFIG_HYPERV_NET)
141 # define LL_MAX_HEADER 128
142 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
143 # if defined(CONFIG_MAC80211_MESH)
144 # define LL_MAX_HEADER 128
146 # define LL_MAX_HEADER 96
149 # define LL_MAX_HEADER 32
152 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
153 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
154 #define MAX_HEADER LL_MAX_HEADER
156 #define MAX_HEADER (LL_MAX_HEADER + 48)
160 * Old network device statistics. Fields are native words
161 * (unsigned long) so they can be read and written atomically.
164 struct net_device_stats {
165 unsigned long rx_packets;
166 unsigned long tx_packets;
167 unsigned long rx_bytes;
168 unsigned long tx_bytes;
169 unsigned long rx_errors;
170 unsigned long tx_errors;
171 unsigned long rx_dropped;
172 unsigned long tx_dropped;
173 unsigned long multicast;
174 unsigned long collisions;
175 unsigned long rx_length_errors;
176 unsigned long rx_over_errors;
177 unsigned long rx_crc_errors;
178 unsigned long rx_frame_errors;
179 unsigned long rx_fifo_errors;
180 unsigned long rx_missed_errors;
181 unsigned long tx_aborted_errors;
182 unsigned long tx_carrier_errors;
183 unsigned long tx_fifo_errors;
184 unsigned long tx_heartbeat_errors;
185 unsigned long tx_window_errors;
186 unsigned long rx_compressed;
187 unsigned long tx_compressed;
191 #include <linux/cache.h>
192 #include <linux/skbuff.h>
195 #include <linux/static_key.h>
196 extern struct static_key rps_needed;
197 extern struct static_key rfs_needed;
204 struct netdev_hw_addr {
205 struct list_head list;
206 unsigned char addr[MAX_ADDR_LEN];
208 #define NETDEV_HW_ADDR_T_LAN 1
209 #define NETDEV_HW_ADDR_T_SAN 2
210 #define NETDEV_HW_ADDR_T_SLAVE 3
211 #define NETDEV_HW_ADDR_T_UNICAST 4
212 #define NETDEV_HW_ADDR_T_MULTICAST 5
217 struct rcu_head rcu_head;
220 struct netdev_hw_addr_list {
221 struct list_head list;
225 #define netdev_hw_addr_list_count(l) ((l)->count)
226 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
227 #define netdev_hw_addr_list_for_each(ha, l) \
228 list_for_each_entry(ha, &(l)->list, list)
230 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
231 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
232 #define netdev_for_each_uc_addr(ha, dev) \
233 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
235 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
236 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
237 #define netdev_for_each_mc_addr(ha, dev) \
238 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
244 /* cached hardware header; allow for machine alignment needs. */
245 #define HH_DATA_MOD 16
246 #define HH_DATA_OFF(__len) \
247 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
248 #define HH_DATA_ALIGN(__len) \
249 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
250 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
253 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
255 * dev->hard_header_len ? (dev->hard_header_len +
256 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
258 * We could use other alignment values, but we must maintain the
259 * relationship HH alignment <= LL alignment.
261 #define LL_RESERVED_SPACE(dev) \
262 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
263 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
264 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 int (*create) (struct sk_buff *skb, struct net_device *dev,
268 unsigned short type, const void *daddr,
269 const void *saddr, unsigned int len);
270 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
271 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
272 void (*cache_update)(struct hh_cache *hh,
273 const struct net_device *dev,
274 const unsigned char *haddr);
275 bool (*validate)(const char *ll_header, unsigned int len);
278 /* These flag bits are private to the generic network queueing
279 * layer; they may not be explicitly referenced by any other
283 enum netdev_state_t {
285 __LINK_STATE_PRESENT,
286 __LINK_STATE_NOCARRIER,
287 __LINK_STATE_LINKWATCH_PENDING,
288 __LINK_STATE_DORMANT,
293 * This structure holds boot-time configured netdevice settings. They
294 * are then used in the device probing.
296 struct netdev_boot_setup {
300 #define NETDEV_BOOT_SETUP_MAX 8
302 int __init netdev_boot_setup(char *str);
305 * Structure for NAPI scheduling similar to tasklet but with weighting
308 /* The poll_list must only be managed by the entity which
309 * changes the state of the NAPI_STATE_SCHED bit. This means
310 * whoever atomically sets that bit can add this napi_struct
311 * to the per-CPU poll_list, and whoever clears that bit
312 * can remove from the list right before clearing the bit.
314 struct list_head poll_list;
318 unsigned int gro_count;
319 int (*poll)(struct napi_struct *, int);
320 #ifdef CONFIG_NETPOLL
323 struct net_device *dev;
324 struct sk_buff *gro_list;
326 struct hrtimer timer;
327 struct list_head dev_list;
328 struct hlist_node napi_hash_node;
329 unsigned int napi_id;
333 NAPI_STATE_SCHED, /* Poll is scheduled */
334 NAPI_STATE_MISSED, /* reschedule a napi */
335 NAPI_STATE_DISABLE, /* Disable pending */
336 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
337 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
338 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
339 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
343 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
344 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
345 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
346 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
347 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
348 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
349 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
360 typedef enum gro_result gro_result_t;
363 * enum rx_handler_result - Possible return values for rx_handlers.
364 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
366 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
367 * case skb->dev was changed by rx_handler.
368 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
369 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
371 * rx_handlers are functions called from inside __netif_receive_skb(), to do
372 * special processing of the skb, prior to delivery to protocol handlers.
374 * Currently, a net_device can only have a single rx_handler registered. Trying
375 * to register a second rx_handler will return -EBUSY.
377 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
378 * To unregister a rx_handler on a net_device, use
379 * netdev_rx_handler_unregister().
381 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
384 * If the rx_handler consumed the skb in some way, it should return
385 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
386 * the skb to be delivered in some other way.
388 * If the rx_handler changed skb->dev, to divert the skb to another
389 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
390 * new device will be called if it exists.
392 * If the rx_handler decides the skb should be ignored, it should return
393 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
394 * are registered on exact device (ptype->dev == skb->dev).
396 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
397 * delivered, it should return RX_HANDLER_PASS.
399 * A device without a registered rx_handler will behave as if rx_handler
400 * returned RX_HANDLER_PASS.
403 enum rx_handler_result {
409 typedef enum rx_handler_result rx_handler_result_t;
410 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
412 void __napi_schedule(struct napi_struct *n);
413 void __napi_schedule_irqoff(struct napi_struct *n);
415 static inline bool napi_disable_pending(struct napi_struct *n)
417 return test_bit(NAPI_STATE_DISABLE, &n->state);
420 bool napi_schedule_prep(struct napi_struct *n);
423 * napi_schedule - schedule NAPI poll
426 * Schedule NAPI poll routine to be called if it is not already
429 static inline void napi_schedule(struct napi_struct *n)
431 if (napi_schedule_prep(n))
436 * napi_schedule_irqoff - schedule NAPI poll
439 * Variant of napi_schedule(), assuming hard irqs are masked.
441 static inline void napi_schedule_irqoff(struct napi_struct *n)
443 if (napi_schedule_prep(n))
444 __napi_schedule_irqoff(n);
447 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
448 static inline bool napi_reschedule(struct napi_struct *napi)
450 if (napi_schedule_prep(napi)) {
451 __napi_schedule(napi);
457 bool napi_complete_done(struct napi_struct *n, int work_done);
459 * napi_complete - NAPI processing complete
462 * Mark NAPI processing as complete.
463 * Consider using napi_complete_done() instead.
464 * Return false if device should avoid rearming interrupts.
466 static inline bool napi_complete(struct napi_struct *n)
468 return napi_complete_done(n, 0);
472 * napi_hash_del - remove a NAPI from global table
473 * @napi: NAPI context
475 * Warning: caller must observe RCU grace period
476 * before freeing memory containing @napi, if
477 * this function returns true.
478 * Note: core networking stack automatically calls it
479 * from netif_napi_del().
480 * Drivers might want to call this helper to combine all
481 * the needed RCU grace periods into a single one.
483 bool napi_hash_del(struct napi_struct *napi);
486 * napi_disable - prevent NAPI from scheduling
489 * Stop NAPI from being scheduled on this context.
490 * Waits till any outstanding processing completes.
492 void napi_disable(struct napi_struct *n);
495 * napi_enable - enable NAPI scheduling
498 * Resume NAPI from being scheduled on this context.
499 * Must be paired with napi_disable.
501 static inline void napi_enable(struct napi_struct *n)
503 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
504 smp_mb__before_atomic();
505 clear_bit(NAPI_STATE_SCHED, &n->state);
506 clear_bit(NAPI_STATE_NPSVC, &n->state);
510 * napi_synchronize - wait until NAPI is not running
513 * Wait until NAPI is done being scheduled on this context.
514 * Waits till any outstanding processing completes but
515 * does not disable future activations.
517 static inline void napi_synchronize(const struct napi_struct *n)
519 if (IS_ENABLED(CONFIG_SMP))
520 while (test_bit(NAPI_STATE_SCHED, &n->state))
526 enum netdev_queue_state_t {
527 __QUEUE_STATE_DRV_XOFF,
528 __QUEUE_STATE_STACK_XOFF,
529 __QUEUE_STATE_FROZEN,
532 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
533 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
534 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
536 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
537 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
539 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
543 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
544 * netif_tx_* functions below are used to manipulate this flag. The
545 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
546 * queue independently. The netif_xmit_*stopped functions below are called
547 * to check if the queue has been stopped by the driver or stack (either
548 * of the XOFF bits are set in the state). Drivers should not need to call
549 * netif_xmit*stopped functions, they should only be using netif_tx_*.
552 struct netdev_queue {
556 struct net_device *dev;
557 struct Qdisc __rcu *qdisc;
558 struct Qdisc *qdisc_sleeping;
562 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
565 unsigned long tx_maxrate;
567 * Number of TX timeouts for this queue
568 * (/sys/class/net/DEV/Q/trans_timeout)
570 unsigned long trans_timeout;
574 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
577 * Time (in jiffies) of last Tx
579 unsigned long trans_start;
586 } ____cacheline_aligned_in_smp;
588 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
590 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
597 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
599 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
606 * This structure holds an RPS map which can be of variable length. The
607 * map is an array of CPUs.
614 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
617 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
618 * tail pointer for that CPU's input queue at the time of last enqueue, and
619 * a hardware filter index.
621 struct rps_dev_flow {
624 unsigned int last_qtail;
626 #define RPS_NO_FILTER 0xffff
629 * The rps_dev_flow_table structure contains a table of flow mappings.
631 struct rps_dev_flow_table {
634 struct rps_dev_flow flows[0];
636 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
637 ((_num) * sizeof(struct rps_dev_flow)))
640 * The rps_sock_flow_table contains mappings of flows to the last CPU
641 * on which they were processed by the application (set in recvmsg).
642 * Each entry is a 32bit value. Upper part is the high-order bits
643 * of flow hash, lower part is CPU number.
644 * rps_cpu_mask is used to partition the space, depending on number of
645 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
646 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
647 * meaning we use 32-6=26 bits for the hash.
649 struct rps_sock_flow_table {
652 u32 ents[0] ____cacheline_aligned_in_smp;
654 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
656 #define RPS_NO_CPU 0xffff
658 extern u32 rps_cpu_mask;
659 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
661 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
665 unsigned int index = hash & table->mask;
666 u32 val = hash & ~rps_cpu_mask;
668 /* We only give a hint, preemption can change CPU under us */
669 val |= raw_smp_processor_id();
671 if (table->ents[index] != val)
672 table->ents[index] = val;
676 #ifdef CONFIG_RFS_ACCEL
677 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
680 #endif /* CONFIG_RPS */
682 /* This structure contains an instance of an RX queue. */
683 struct netdev_rx_queue {
685 struct rps_map __rcu *rps_map;
686 struct rps_dev_flow_table __rcu *rps_flow_table;
689 struct net_device *dev;
690 } ____cacheline_aligned_in_smp;
693 * RX queue sysfs structures and functions.
695 struct rx_queue_attribute {
696 struct attribute attr;
697 ssize_t (*show)(struct netdev_rx_queue *queue,
698 struct rx_queue_attribute *attr, char *buf);
699 ssize_t (*store)(struct netdev_rx_queue *queue,
700 struct rx_queue_attribute *attr, const char *buf, size_t len);
705 * This structure holds an XPS map which can be of variable length. The
706 * map is an array of queues.
710 unsigned int alloc_len;
714 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
715 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
716 - sizeof(struct xps_map)) / sizeof(u16))
719 * This structure holds all XPS maps for device. Maps are indexed by CPU.
721 struct xps_dev_maps {
723 struct xps_map __rcu *cpu_map[0];
725 #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
726 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
727 #endif /* CONFIG_XPS */
729 #define TC_MAX_QUEUE 16
730 #define TC_BITMASK 15
731 /* HW offloaded queuing disciplines txq count and offset maps */
732 struct netdev_tc_txq {
737 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
739 * This structure is to hold information about the device
740 * configured to run FCoE protocol stack.
742 struct netdev_fcoe_hbainfo {
743 char manufacturer[64];
744 char serial_number[64];
745 char hardware_version[64];
746 char driver_version[64];
747 char optionrom_version[64];
748 char firmware_version[64];
750 char model_description[256];
754 #define MAX_PHYS_ITEM_ID_LEN 32
756 /* This structure holds a unique identifier to identify some
757 * physical item (port for example) used by a netdevice.
759 struct netdev_phys_item_id {
760 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
761 unsigned char id_len;
764 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
765 struct netdev_phys_item_id *b)
767 return a->id_len == b->id_len &&
768 memcmp(a->id, b->id, a->id_len) == 0;
771 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
772 struct sk_buff *skb);
774 /* These structures hold the attributes of qdisc and classifiers
775 * that are being passed to the netdevice through the setup_tc op.
785 struct tc_cls_u32_offload;
787 struct tc_to_netdev {
790 struct tc_cls_u32_offload *cls_u32;
791 struct tc_cls_flower_offload *cls_flower;
792 struct tc_cls_matchall_offload *cls_mall;
793 struct tc_cls_bpf_offload *cls_bpf;
794 struct tc_mqprio_qopt *mqprio;
799 /* These structures hold the attributes of xdp state that are being passed
800 * to the netdevice through the xdp op.
802 enum xdp_netdev_command {
803 /* Set or clear a bpf program used in the earliest stages of packet
804 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
805 * is responsible for calling bpf_prog_put on any old progs that are
806 * stored. In case of error, the callee need not release the new prog
807 * reference, but on success it takes ownership and must bpf_prog_put
808 * when it is no longer used.
812 /* Check if a bpf program is set on the device. The callee should
813 * set @prog_attached to one of XDP_ATTACHED_* values, note that "true"
814 * is equivalent to XDP_ATTACHED_DRV.
819 struct netlink_ext_ack;
822 enum xdp_netdev_command command;
827 struct bpf_prog *prog;
828 struct netlink_ext_ack *extack;
838 #ifdef CONFIG_XFRM_OFFLOAD
840 int (*xdo_dev_state_add) (struct xfrm_state *x);
841 void (*xdo_dev_state_delete) (struct xfrm_state *x);
842 void (*xdo_dev_state_free) (struct xfrm_state *x);
843 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
844 struct xfrm_state *x);
849 * This structure defines the management hooks for network devices.
850 * The following hooks can be defined; unless noted otherwise, they are
851 * optional and can be filled with a null pointer.
853 * int (*ndo_init)(struct net_device *dev);
854 * This function is called once when a network device is registered.
855 * The network device can use this for any late stage initialization
856 * or semantic validation. It can fail with an error code which will
857 * be propagated back to register_netdev.
859 * void (*ndo_uninit)(struct net_device *dev);
860 * This function is called when device is unregistered or when registration
861 * fails. It is not called if init fails.
863 * int (*ndo_open)(struct net_device *dev);
864 * This function is called when a network device transitions to the up
867 * int (*ndo_stop)(struct net_device *dev);
868 * This function is called when a network device transitions to the down
871 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
872 * struct net_device *dev);
873 * Called when a packet needs to be transmitted.
874 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
875 * the queue before that can happen; it's for obsolete devices and weird
876 * corner cases, but the stack really does a non-trivial amount
877 * of useless work if you return NETDEV_TX_BUSY.
878 * Required; cannot be NULL.
880 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
881 * struct net_device *dev
882 * netdev_features_t features);
883 * Called by core transmit path to determine if device is capable of
884 * performing offload operations on a given packet. This is to give
885 * the device an opportunity to implement any restrictions that cannot
886 * be otherwise expressed by feature flags. The check is called with
887 * the set of features that the stack has calculated and it returns
888 * those the driver believes to be appropriate.
890 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
891 * void *accel_priv, select_queue_fallback_t fallback);
892 * Called to decide which queue to use when device supports multiple
895 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
896 * This function is called to allow device receiver to make
897 * changes to configuration when multicast or promiscuous is enabled.
899 * void (*ndo_set_rx_mode)(struct net_device *dev);
900 * This function is called device changes address list filtering.
901 * If driver handles unicast address filtering, it should set
902 * IFF_UNICAST_FLT in its priv_flags.
904 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
905 * This function is called when the Media Access Control address
906 * needs to be changed. If this interface is not defined, the
907 * MAC address can not be changed.
909 * int (*ndo_validate_addr)(struct net_device *dev);
910 * Test if Media Access Control address is valid for the device.
912 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
913 * Called when a user requests an ioctl which can't be handled by
914 * the generic interface code. If not defined ioctls return
915 * not supported error code.
917 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
918 * Used to set network devices bus interface parameters. This interface
919 * is retained for legacy reasons; new devices should use the bus
920 * interface (PCI) for low level management.
922 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
923 * Called when a user wants to change the Maximum Transfer Unit
926 * void (*ndo_tx_timeout)(struct net_device *dev);
927 * Callback used when the transmitter has not made any progress
928 * for dev->watchdog ticks.
930 * void (*ndo_get_stats64)(struct net_device *dev,
931 * struct rtnl_link_stats64 *storage);
932 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
933 * Called when a user wants to get the network device usage
934 * statistics. Drivers must do one of the following:
935 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
936 * rtnl_link_stats64 structure passed by the caller.
937 * 2. Define @ndo_get_stats to update a net_device_stats structure
938 * (which should normally be dev->stats) and return a pointer to
939 * it. The structure may be changed asynchronously only if each
940 * field is written atomically.
941 * 3. Update dev->stats asynchronously and atomically, and define
944 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
945 * Return true if this device supports offload stats of this attr_id.
947 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
949 * Get statistics for offload operations by attr_id. Write it into the
952 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
953 * If device supports VLAN filtering this function is called when a
954 * VLAN id is registered.
956 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
957 * If device supports VLAN filtering this function is called when a
958 * VLAN id is unregistered.
960 * void (*ndo_poll_controller)(struct net_device *dev);
962 * SR-IOV management functions.
963 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
964 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
965 * u8 qos, __be16 proto);
966 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
968 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
969 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
970 * int (*ndo_get_vf_config)(struct net_device *dev,
971 * int vf, struct ifla_vf_info *ivf);
972 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
973 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
974 * struct nlattr *port[]);
976 * Enable or disable the VF ability to query its RSS Redirection Table and
977 * Hash Key. This is needed since on some devices VF share this information
978 * with PF and querying it may introduce a theoretical security risk.
979 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
980 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
981 * int (*ndo_setup_tc)(struct net_device *dev, u32 handle, u32 chain_index,
982 * __be16 protocol, struct tc_to_netdev *tc);
983 * Called to setup any 'tc' scheduler, classifier or action on @dev.
984 * This is always called from the stack with the rtnl lock held and netif
985 * tx queues stopped. This allows the netdevice to perform queue
988 * Fiber Channel over Ethernet (FCoE) offload functions.
989 * int (*ndo_fcoe_enable)(struct net_device *dev);
990 * Called when the FCoE protocol stack wants to start using LLD for FCoE
991 * so the underlying device can perform whatever needed configuration or
992 * initialization to support acceleration of FCoE traffic.
994 * int (*ndo_fcoe_disable)(struct net_device *dev);
995 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
996 * so the underlying device can perform whatever needed clean-ups to
997 * stop supporting acceleration of FCoE traffic.
999 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1000 * struct scatterlist *sgl, unsigned int sgc);
1001 * Called when the FCoE Initiator wants to initialize an I/O that
1002 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1003 * perform necessary setup and returns 1 to indicate the device is set up
1004 * successfully to perform DDP on this I/O, otherwise this returns 0.
1006 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1007 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1008 * indicated by the FC exchange id 'xid', so the underlying device can
1009 * clean up and reuse resources for later DDP requests.
1011 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1012 * struct scatterlist *sgl, unsigned int sgc);
1013 * Called when the FCoE Target wants to initialize an I/O that
1014 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1015 * perform necessary setup and returns 1 to indicate the device is set up
1016 * successfully to perform DDP on this I/O, otherwise this returns 0.
1018 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1019 * struct netdev_fcoe_hbainfo *hbainfo);
1020 * Called when the FCoE Protocol stack wants information on the underlying
1021 * device. This information is utilized by the FCoE protocol stack to
1022 * register attributes with Fiber Channel management service as per the
1023 * FC-GS Fabric Device Management Information(FDMI) specification.
1025 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1026 * Called when the underlying device wants to override default World Wide
1027 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1028 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1029 * protocol stack to use.
1032 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1033 * u16 rxq_index, u32 flow_id);
1034 * Set hardware filter for RFS. rxq_index is the target queue index;
1035 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1036 * Return the filter ID on success, or a negative error code.
1038 * Slave management functions (for bridge, bonding, etc).
1039 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1040 * Called to make another netdev an underling.
1042 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1043 * Called to release previously enslaved netdev.
1045 * Feature/offload setting functions.
1046 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1047 * netdev_features_t features);
1048 * Adjusts the requested feature flags according to device-specific
1049 * constraints, and returns the resulting flags. Must not modify
1052 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1053 * Called to update device configuration to new features. Passed
1054 * feature set might be less than what was returned by ndo_fix_features()).
1055 * Must return >0 or -errno if it changed dev->features itself.
1057 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1058 * struct net_device *dev,
1059 * const unsigned char *addr, u16 vid, u16 flags)
1060 * Adds an FDB entry to dev for addr.
1061 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1062 * struct net_device *dev,
1063 * const unsigned char *addr, u16 vid)
1064 * Deletes the FDB entry from dev coresponding to addr.
1065 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1066 * struct net_device *dev, struct net_device *filter_dev,
1068 * Used to add FDB entries to dump requests. Implementers should add
1069 * entries to skb and update idx with the number of entries.
1071 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1073 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1074 * struct net_device *dev, u32 filter_mask,
1076 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1079 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1080 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1081 * which do not represent real hardware may define this to allow their
1082 * userspace components to manage their virtual carrier state. Devices
1083 * that determine carrier state from physical hardware properties (eg
1084 * network cables) or protocol-dependent mechanisms (eg
1085 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1087 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1088 * struct netdev_phys_item_id *ppid);
1089 * Called to get ID of physical port of this device. If driver does
1090 * not implement this, it is assumed that the hw is not able to have
1091 * multiple net devices on single physical port.
1093 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1094 * struct udp_tunnel_info *ti);
1095 * Called by UDP tunnel to notify a driver about the UDP port and socket
1096 * address family that a UDP tunnel is listnening to. It is called only
1097 * when a new port starts listening. The operation is protected by the
1100 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1101 * struct udp_tunnel_info *ti);
1102 * Called by UDP tunnel to notify the driver about a UDP port and socket
1103 * address family that the UDP tunnel is not listening to anymore. The
1104 * operation is protected by the RTNL.
1106 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1107 * struct net_device *dev)
1108 * Called by upper layer devices to accelerate switching or other
1109 * station functionality into hardware. 'pdev is the lowerdev
1110 * to use for the offload and 'dev' is the net device that will
1111 * back the offload. Returns a pointer to the private structure
1112 * the upper layer will maintain.
1113 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1114 * Called by upper layer device to delete the station created
1115 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1116 * the station and priv is the structure returned by the add
1118 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1119 * int queue_index, u32 maxrate);
1120 * Called when a user wants to set a max-rate limitation of specific
1122 * int (*ndo_get_iflink)(const struct net_device *dev);
1123 * Called to get the iflink value of this device.
1124 * void (*ndo_change_proto_down)(struct net_device *dev,
1126 * This function is used to pass protocol port error state information
1127 * to the switch driver. The switch driver can react to the proto_down
1128 * by doing a phys down on the associated switch port.
1129 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1130 * This function is used to get egress tunnel information for given skb.
1131 * This is useful for retrieving outer tunnel header parameters while
1133 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1134 * This function is used to specify the headroom that the skb must
1135 * consider when allocation skb during packet reception. Setting
1136 * appropriate rx headroom value allows avoiding skb head copy on
1137 * forward. Setting a negative value resets the rx headroom to the
1139 * int (*ndo_xdp)(struct net_device *dev, struct netdev_xdp *xdp);
1140 * This function is used to set or query state related to XDP on the
1141 * netdevice. See definition of enum xdp_netdev_command for details.
1142 * int (*ndo_xdp_xmit)(struct net_device *dev, struct xdp_buff *xdp);
1143 * This function is used to submit a XDP packet for transmit on a
1147 struct net_device_ops {
1148 int (*ndo_init)(struct net_device *dev);
1149 void (*ndo_uninit)(struct net_device *dev);
1150 int (*ndo_open)(struct net_device *dev);
1151 int (*ndo_stop)(struct net_device *dev);
1152 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1153 struct net_device *dev);
1154 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1155 struct net_device *dev,
1156 netdev_features_t features);
1157 u16 (*ndo_select_queue)(struct net_device *dev,
1158 struct sk_buff *skb,
1160 select_queue_fallback_t fallback);
1161 void (*ndo_change_rx_flags)(struct net_device *dev,
1163 void (*ndo_set_rx_mode)(struct net_device *dev);
1164 int (*ndo_set_mac_address)(struct net_device *dev,
1166 int (*ndo_validate_addr)(struct net_device *dev);
1167 int (*ndo_do_ioctl)(struct net_device *dev,
1168 struct ifreq *ifr, int cmd);
1169 int (*ndo_set_config)(struct net_device *dev,
1171 int (*ndo_change_mtu)(struct net_device *dev,
1173 int (*ndo_neigh_setup)(struct net_device *dev,
1174 struct neigh_parms *);
1175 void (*ndo_tx_timeout) (struct net_device *dev);
1177 void (*ndo_get_stats64)(struct net_device *dev,
1178 struct rtnl_link_stats64 *storage);
1179 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1180 int (*ndo_get_offload_stats)(int attr_id,
1181 const struct net_device *dev,
1183 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1185 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1186 __be16 proto, u16 vid);
1187 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1188 __be16 proto, u16 vid);
1189 #ifdef CONFIG_NET_POLL_CONTROLLER
1190 void (*ndo_poll_controller)(struct net_device *dev);
1191 int (*ndo_netpoll_setup)(struct net_device *dev,
1192 struct netpoll_info *info);
1193 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1195 int (*ndo_set_vf_mac)(struct net_device *dev,
1196 int queue, u8 *mac);
1197 int (*ndo_set_vf_vlan)(struct net_device *dev,
1198 int queue, u16 vlan,
1199 u8 qos, __be16 proto);
1200 int (*ndo_set_vf_rate)(struct net_device *dev,
1201 int vf, int min_tx_rate,
1203 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1204 int vf, bool setting);
1205 int (*ndo_set_vf_trust)(struct net_device *dev,
1206 int vf, bool setting);
1207 int (*ndo_get_vf_config)(struct net_device *dev,
1209 struct ifla_vf_info *ivf);
1210 int (*ndo_set_vf_link_state)(struct net_device *dev,
1211 int vf, int link_state);
1212 int (*ndo_get_vf_stats)(struct net_device *dev,
1214 struct ifla_vf_stats
1216 int (*ndo_set_vf_port)(struct net_device *dev,
1218 struct nlattr *port[]);
1219 int (*ndo_get_vf_port)(struct net_device *dev,
1220 int vf, struct sk_buff *skb);
1221 int (*ndo_set_vf_guid)(struct net_device *dev,
1224 int (*ndo_set_vf_rss_query_en)(
1225 struct net_device *dev,
1226 int vf, bool setting);
1227 int (*ndo_setup_tc)(struct net_device *dev,
1228 u32 handle, u32 chain_index,
1230 struct tc_to_netdev *tc);
1231 #if IS_ENABLED(CONFIG_FCOE)
1232 int (*ndo_fcoe_enable)(struct net_device *dev);
1233 int (*ndo_fcoe_disable)(struct net_device *dev);
1234 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1236 struct scatterlist *sgl,
1238 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1240 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1242 struct scatterlist *sgl,
1244 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1245 struct netdev_fcoe_hbainfo *hbainfo);
1248 #if IS_ENABLED(CONFIG_LIBFCOE)
1249 #define NETDEV_FCOE_WWNN 0
1250 #define NETDEV_FCOE_WWPN 1
1251 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1252 u64 *wwn, int type);
1255 #ifdef CONFIG_RFS_ACCEL
1256 int (*ndo_rx_flow_steer)(struct net_device *dev,
1257 const struct sk_buff *skb,
1261 int (*ndo_add_slave)(struct net_device *dev,
1262 struct net_device *slave_dev);
1263 int (*ndo_del_slave)(struct net_device *dev,
1264 struct net_device *slave_dev);
1265 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1266 netdev_features_t features);
1267 int (*ndo_set_features)(struct net_device *dev,
1268 netdev_features_t features);
1269 int (*ndo_neigh_construct)(struct net_device *dev,
1270 struct neighbour *n);
1271 void (*ndo_neigh_destroy)(struct net_device *dev,
1272 struct neighbour *n);
1274 int (*ndo_fdb_add)(struct ndmsg *ndm,
1275 struct nlattr *tb[],
1276 struct net_device *dev,
1277 const unsigned char *addr,
1280 int (*ndo_fdb_del)(struct ndmsg *ndm,
1281 struct nlattr *tb[],
1282 struct net_device *dev,
1283 const unsigned char *addr,
1285 int (*ndo_fdb_dump)(struct sk_buff *skb,
1286 struct netlink_callback *cb,
1287 struct net_device *dev,
1288 struct net_device *filter_dev,
1291 int (*ndo_bridge_setlink)(struct net_device *dev,
1292 struct nlmsghdr *nlh,
1294 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1296 struct net_device *dev,
1299 int (*ndo_bridge_dellink)(struct net_device *dev,
1300 struct nlmsghdr *nlh,
1302 int (*ndo_change_carrier)(struct net_device *dev,
1304 int (*ndo_get_phys_port_id)(struct net_device *dev,
1305 struct netdev_phys_item_id *ppid);
1306 int (*ndo_get_phys_port_name)(struct net_device *dev,
1307 char *name, size_t len);
1308 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1309 struct udp_tunnel_info *ti);
1310 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1311 struct udp_tunnel_info *ti);
1312 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1313 struct net_device *dev);
1314 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1317 int (*ndo_get_lock_subclass)(struct net_device *dev);
1318 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1321 int (*ndo_get_iflink)(const struct net_device *dev);
1322 int (*ndo_change_proto_down)(struct net_device *dev,
1324 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1325 struct sk_buff *skb);
1326 void (*ndo_set_rx_headroom)(struct net_device *dev,
1327 int needed_headroom);
1328 int (*ndo_xdp)(struct net_device *dev,
1329 struct netdev_xdp *xdp);
1330 int (*ndo_xdp_xmit)(struct net_device *dev,
1331 struct xdp_buff *xdp);
1335 * enum net_device_priv_flags - &struct net_device priv_flags
1337 * These are the &struct net_device, they are only set internally
1338 * by drivers and used in the kernel. These flags are invisible to
1339 * userspace; this means that the order of these flags can change
1340 * during any kernel release.
1342 * You should have a pretty good reason to be extending these flags.
1344 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1345 * @IFF_EBRIDGE: Ethernet bridging device
1346 * @IFF_BONDING: bonding master or slave
1347 * @IFF_ISATAP: ISATAP interface (RFC4214)
1348 * @IFF_WAN_HDLC: WAN HDLC device
1349 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1351 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1352 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1353 * @IFF_MACVLAN_PORT: device used as macvlan port
1354 * @IFF_BRIDGE_PORT: device used as bridge port
1355 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1356 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1357 * @IFF_UNICAST_FLT: Supports unicast filtering
1358 * @IFF_TEAM_PORT: device used as team port
1359 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1360 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1361 * change when it's running
1362 * @IFF_MACVLAN: Macvlan device
1363 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1364 * underlying stacked devices
1365 * @IFF_IPVLAN_MASTER: IPvlan master device
1366 * @IFF_IPVLAN_SLAVE: IPvlan slave device
1367 * @IFF_L3MDEV_MASTER: device is an L3 master device
1368 * @IFF_NO_QUEUE: device can run without qdisc attached
1369 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1370 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1371 * @IFF_TEAM: device is a team device
1372 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1373 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1374 * entity (i.e. the master device for bridged veth)
1375 * @IFF_MACSEC: device is a MACsec device
1377 enum netdev_priv_flags {
1378 IFF_802_1Q_VLAN = 1<<0,
1382 IFF_WAN_HDLC = 1<<4,
1383 IFF_XMIT_DST_RELEASE = 1<<5,
1384 IFF_DONT_BRIDGE = 1<<6,
1385 IFF_DISABLE_NETPOLL = 1<<7,
1386 IFF_MACVLAN_PORT = 1<<8,
1387 IFF_BRIDGE_PORT = 1<<9,
1388 IFF_OVS_DATAPATH = 1<<10,
1389 IFF_TX_SKB_SHARING = 1<<11,
1390 IFF_UNICAST_FLT = 1<<12,
1391 IFF_TEAM_PORT = 1<<13,
1392 IFF_SUPP_NOFCS = 1<<14,
1393 IFF_LIVE_ADDR_CHANGE = 1<<15,
1394 IFF_MACVLAN = 1<<16,
1395 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1396 IFF_IPVLAN_MASTER = 1<<18,
1397 IFF_IPVLAN_SLAVE = 1<<19,
1398 IFF_L3MDEV_MASTER = 1<<20,
1399 IFF_NO_QUEUE = 1<<21,
1400 IFF_OPENVSWITCH = 1<<22,
1401 IFF_L3MDEV_SLAVE = 1<<23,
1403 IFF_RXFH_CONFIGURED = 1<<25,
1404 IFF_PHONY_HEADROOM = 1<<26,
1408 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1409 #define IFF_EBRIDGE IFF_EBRIDGE
1410 #define IFF_BONDING IFF_BONDING
1411 #define IFF_ISATAP IFF_ISATAP
1412 #define IFF_WAN_HDLC IFF_WAN_HDLC
1413 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1414 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1415 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1416 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1417 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1418 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1419 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1420 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1421 #define IFF_TEAM_PORT IFF_TEAM_PORT
1422 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1423 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1424 #define IFF_MACVLAN IFF_MACVLAN
1425 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1426 #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER
1427 #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
1428 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1429 #define IFF_NO_QUEUE IFF_NO_QUEUE
1430 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1431 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1432 #define IFF_TEAM IFF_TEAM
1433 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1434 #define IFF_MACSEC IFF_MACSEC
1437 * struct net_device - The DEVICE structure.
1439 * Actually, this whole structure is a big mistake. It mixes I/O
1440 * data with strictly "high-level" data, and it has to know about
1441 * almost every data structure used in the INET module.
1443 * @name: This is the first field of the "visible" part of this structure
1444 * (i.e. as seen by users in the "Space.c" file). It is the name
1447 * @name_hlist: Device name hash chain, please keep it close to name[]
1448 * @ifalias: SNMP alias
1449 * @mem_end: Shared memory end
1450 * @mem_start: Shared memory start
1451 * @base_addr: Device I/O address
1452 * @irq: Device IRQ number
1454 * @carrier_changes: Stats to monitor carrier on<->off transitions
1456 * @state: Generic network queuing layer state, see netdev_state_t
1457 * @dev_list: The global list of network devices
1458 * @napi_list: List entry used for polling NAPI devices
1459 * @unreg_list: List entry when we are unregistering the
1460 * device; see the function unregister_netdev
1461 * @close_list: List entry used when we are closing the device
1462 * @ptype_all: Device-specific packet handlers for all protocols
1463 * @ptype_specific: Device-specific, protocol-specific packet handlers
1465 * @adj_list: Directly linked devices, like slaves for bonding
1466 * @features: Currently active device features
1467 * @hw_features: User-changeable features
1469 * @wanted_features: User-requested features
1470 * @vlan_features: Mask of features inheritable by VLAN devices
1472 * @hw_enc_features: Mask of features inherited by encapsulating devices
1473 * This field indicates what encapsulation
1474 * offloads the hardware is capable of doing,
1475 * and drivers will need to set them appropriately.
1477 * @mpls_features: Mask of features inheritable by MPLS
1479 * @ifindex: interface index
1480 * @group: The group the device belongs to
1482 * @stats: Statistics struct, which was left as a legacy, use
1483 * rtnl_link_stats64 instead
1485 * @rx_dropped: Dropped packets by core network,
1486 * do not use this in drivers
1487 * @tx_dropped: Dropped packets by core network,
1488 * do not use this in drivers
1489 * @rx_nohandler: nohandler dropped packets by core network on
1490 * inactive devices, do not use this in drivers
1492 * @wireless_handlers: List of functions to handle Wireless Extensions,
1494 * see <net/iw_handler.h> for details.
1495 * @wireless_data: Instance data managed by the core of wireless extensions
1497 * @netdev_ops: Includes several pointers to callbacks,
1498 * if one wants to override the ndo_*() functions
1499 * @ethtool_ops: Management operations
1500 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1501 * discovery handling. Necessary for e.g. 6LoWPAN.
1502 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1503 * of Layer 2 headers.
1505 * @flags: Interface flags (a la BSD)
1506 * @priv_flags: Like 'flags' but invisible to userspace,
1507 * see if.h for the definitions
1508 * @gflags: Global flags ( kept as legacy )
1509 * @padded: How much padding added by alloc_netdev()
1510 * @operstate: RFC2863 operstate
1511 * @link_mode: Mapping policy to operstate
1512 * @if_port: Selectable AUI, TP, ...
1514 * @mtu: Interface MTU value
1515 * @min_mtu: Interface Minimum MTU value
1516 * @max_mtu: Interface Maximum MTU value
1517 * @type: Interface hardware type
1518 * @hard_header_len: Maximum hardware header length.
1519 * @min_header_len: Minimum hardware header length
1521 * @needed_headroom: Extra headroom the hardware may need, but not in all
1522 * cases can this be guaranteed
1523 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1524 * cases can this be guaranteed. Some cases also use
1525 * LL_MAX_HEADER instead to allocate the skb
1527 * interface address info:
1529 * @perm_addr: Permanent hw address
1530 * @addr_assign_type: Hw address assignment type
1531 * @addr_len: Hardware address length
1532 * @neigh_priv_len: Used in neigh_alloc()
1533 * @dev_id: Used to differentiate devices that share
1534 * the same link layer address
1535 * @dev_port: Used to differentiate devices that share
1537 * @addr_list_lock: XXX: need comments on this one
1538 * @uc_promisc: Counter that indicates promiscuous mode
1539 * has been enabled due to the need to listen to
1540 * additional unicast addresses in a device that
1541 * does not implement ndo_set_rx_mode()
1542 * @uc: unicast mac addresses
1543 * @mc: multicast mac addresses
1544 * @dev_addrs: list of device hw addresses
1545 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1546 * @promiscuity: Number of times the NIC is told to work in
1547 * promiscuous mode; if it becomes 0 the NIC will
1548 * exit promiscuous mode
1549 * @allmulti: Counter, enables or disables allmulticast mode
1551 * @vlan_info: VLAN info
1552 * @dsa_ptr: dsa specific data
1553 * @tipc_ptr: TIPC specific data
1554 * @atalk_ptr: AppleTalk link
1555 * @ip_ptr: IPv4 specific data
1556 * @dn_ptr: DECnet specific data
1557 * @ip6_ptr: IPv6 specific data
1558 * @ax25_ptr: AX.25 specific data
1559 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1561 * @dev_addr: Hw address (before bcast,
1562 * because most packets are unicast)
1564 * @_rx: Array of RX queues
1565 * @num_rx_queues: Number of RX queues
1566 * allocated at register_netdev() time
1567 * @real_num_rx_queues: Number of RX queues currently active in device
1569 * @rx_handler: handler for received packets
1570 * @rx_handler_data: XXX: need comments on this one
1571 * @ingress_queue: XXX: need comments on this one
1572 * @broadcast: hw bcast address
1574 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1575 * indexed by RX queue number. Assigned by driver.
1576 * This must only be set if the ndo_rx_flow_steer
1577 * operation is defined
1578 * @index_hlist: Device index hash chain
1580 * @_tx: Array of TX queues
1581 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1582 * @real_num_tx_queues: Number of TX queues currently active in device
1583 * @qdisc: Root qdisc from userspace point of view
1584 * @tx_queue_len: Max frames per queue allowed
1585 * @tx_global_lock: XXX: need comments on this one
1587 * @xps_maps: XXX: need comments on this one
1589 * @watchdog_timeo: Represents the timeout that is used by
1590 * the watchdog (see dev_watchdog())
1591 * @watchdog_timer: List of timers
1593 * @pcpu_refcnt: Number of references to this device
1594 * @todo_list: Delayed register/unregister
1595 * @link_watch_list: XXX: need comments on this one
1597 * @reg_state: Register/unregister state machine
1598 * @dismantle: Device is going to be freed
1599 * @rtnl_link_state: This enum represents the phases of creating
1602 * @needs_free_netdev: Should unregister perform free_netdev?
1603 * @priv_destructor: Called from unregister
1604 * @npinfo: XXX: need comments on this one
1605 * @nd_net: Network namespace this network device is inside
1607 * @ml_priv: Mid-layer private
1608 * @lstats: Loopback statistics
1609 * @tstats: Tunnel statistics
1610 * @dstats: Dummy statistics
1611 * @vstats: Virtual ethernet statistics
1616 * @dev: Class/net/name entry
1617 * @sysfs_groups: Space for optional device, statistics and wireless
1620 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1621 * @rtnl_link_ops: Rtnl_link_ops
1623 * @gso_max_size: Maximum size of generic segmentation offload
1624 * @gso_max_segs: Maximum number of segments that can be passed to the
1627 * @dcbnl_ops: Data Center Bridging netlink ops
1628 * @num_tc: Number of traffic classes in the net device
1629 * @tc_to_txq: XXX: need comments on this one
1630 * @prio_tc_map: XXX: need comments on this one
1632 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1634 * @priomap: XXX: need comments on this one
1635 * @phydev: Physical device may attach itself
1636 * for hardware timestamping
1638 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1639 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1641 * @proto_down: protocol port state information can be sent to the
1642 * switch driver and used to set the phys state of the
1645 * FIXME: cleanup struct net_device such that network protocol info
1650 char name[IFNAMSIZ];
1651 struct hlist_node name_hlist;
1654 * I/O specific fields
1655 * FIXME: Merge these and struct ifmap into one
1657 unsigned long mem_end;
1658 unsigned long mem_start;
1659 unsigned long base_addr;
1662 atomic_t carrier_changes;
1665 * Some hardware also needs these fields (state,dev_list,
1666 * napi_list,unreg_list,close_list) but they are not
1667 * part of the usual set specified in Space.c.
1670 unsigned long state;
1672 struct list_head dev_list;
1673 struct list_head napi_list;
1674 struct list_head unreg_list;
1675 struct list_head close_list;
1676 struct list_head ptype_all;
1677 struct list_head ptype_specific;
1680 struct list_head upper;
1681 struct list_head lower;
1684 netdev_features_t features;
1685 netdev_features_t hw_features;
1686 netdev_features_t wanted_features;
1687 netdev_features_t vlan_features;
1688 netdev_features_t hw_enc_features;
1689 netdev_features_t mpls_features;
1690 netdev_features_t gso_partial_features;
1695 struct net_device_stats stats;
1697 atomic_long_t rx_dropped;
1698 atomic_long_t tx_dropped;
1699 atomic_long_t rx_nohandler;
1701 #ifdef CONFIG_WIRELESS_EXT
1702 const struct iw_handler_def *wireless_handlers;
1703 struct iw_public_data *wireless_data;
1705 const struct net_device_ops *netdev_ops;
1706 const struct ethtool_ops *ethtool_ops;
1707 #ifdef CONFIG_NET_SWITCHDEV
1708 const struct switchdev_ops *switchdev_ops;
1710 #ifdef CONFIG_NET_L3_MASTER_DEV
1711 const struct l3mdev_ops *l3mdev_ops;
1713 #if IS_ENABLED(CONFIG_IPV6)
1714 const struct ndisc_ops *ndisc_ops;
1718 const struct xfrmdev_ops *xfrmdev_ops;
1721 const struct header_ops *header_ops;
1724 unsigned int priv_flags;
1726 unsigned short gflags;
1727 unsigned short padded;
1729 unsigned char operstate;
1730 unsigned char link_mode;
1732 unsigned char if_port;
1736 unsigned int min_mtu;
1737 unsigned int max_mtu;
1738 unsigned short type;
1739 unsigned short hard_header_len;
1740 unsigned char min_header_len;
1742 unsigned short needed_headroom;
1743 unsigned short needed_tailroom;
1745 /* Interface address info. */
1746 unsigned char perm_addr[MAX_ADDR_LEN];
1747 unsigned char addr_assign_type;
1748 unsigned char addr_len;
1749 unsigned short neigh_priv_len;
1750 unsigned short dev_id;
1751 unsigned short dev_port;
1752 spinlock_t addr_list_lock;
1753 unsigned char name_assign_type;
1755 struct netdev_hw_addr_list uc;
1756 struct netdev_hw_addr_list mc;
1757 struct netdev_hw_addr_list dev_addrs;
1760 struct kset *queues_kset;
1762 unsigned int promiscuity;
1763 unsigned int allmulti;
1766 /* Protocol-specific pointers */
1768 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1769 struct vlan_info __rcu *vlan_info;
1771 #if IS_ENABLED(CONFIG_NET_DSA)
1772 struct dsa_switch_tree *dsa_ptr;
1774 #if IS_ENABLED(CONFIG_TIPC)
1775 struct tipc_bearer __rcu *tipc_ptr;
1778 struct in_device __rcu *ip_ptr;
1779 struct dn_dev __rcu *dn_ptr;
1780 struct inet6_dev __rcu *ip6_ptr;
1782 struct wireless_dev *ieee80211_ptr;
1783 struct wpan_dev *ieee802154_ptr;
1784 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1785 struct mpls_dev __rcu *mpls_ptr;
1789 * Cache lines mostly used on receive path (including eth_type_trans())
1791 /* Interface address info used in eth_type_trans() */
1792 unsigned char *dev_addr;
1795 struct netdev_rx_queue *_rx;
1797 unsigned int num_rx_queues;
1798 unsigned int real_num_rx_queues;
1801 struct bpf_prog __rcu *xdp_prog;
1802 unsigned long gro_flush_timeout;
1803 rx_handler_func_t __rcu *rx_handler;
1804 void __rcu *rx_handler_data;
1806 #ifdef CONFIG_NET_CLS_ACT
1807 struct tcf_proto __rcu *ingress_cl_list;
1809 struct netdev_queue __rcu *ingress_queue;
1810 #ifdef CONFIG_NETFILTER_INGRESS
1811 struct nf_hook_entry __rcu *nf_hooks_ingress;
1814 unsigned char broadcast[MAX_ADDR_LEN];
1815 #ifdef CONFIG_RFS_ACCEL
1816 struct cpu_rmap *rx_cpu_rmap;
1818 struct hlist_node index_hlist;
1821 * Cache lines mostly used on transmit path
1823 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1824 unsigned int num_tx_queues;
1825 unsigned int real_num_tx_queues;
1826 struct Qdisc *qdisc;
1827 #ifdef CONFIG_NET_SCHED
1828 DECLARE_HASHTABLE (qdisc_hash, 4);
1830 unsigned int tx_queue_len;
1831 spinlock_t tx_global_lock;
1835 struct xps_dev_maps __rcu *xps_maps;
1837 #ifdef CONFIG_NET_CLS_ACT
1838 struct tcf_proto __rcu *egress_cl_list;
1841 /* These may be needed for future network-power-down code. */
1842 struct timer_list watchdog_timer;
1844 int __percpu *pcpu_refcnt;
1845 struct list_head todo_list;
1847 struct list_head link_watch_list;
1849 enum { NETREG_UNINITIALIZED=0,
1850 NETREG_REGISTERED, /* completed register_netdevice */
1851 NETREG_UNREGISTERING, /* called unregister_netdevice */
1852 NETREG_UNREGISTERED, /* completed unregister todo */
1853 NETREG_RELEASED, /* called free_netdev */
1854 NETREG_DUMMY, /* dummy device for NAPI poll */
1860 RTNL_LINK_INITIALIZED,
1861 RTNL_LINK_INITIALIZING,
1862 } rtnl_link_state:16;
1864 bool needs_free_netdev;
1865 void (*priv_destructor)(struct net_device *dev);
1867 #ifdef CONFIG_NETPOLL
1868 struct netpoll_info __rcu *npinfo;
1871 possible_net_t nd_net;
1873 /* mid-layer private */
1876 struct pcpu_lstats __percpu *lstats;
1877 struct pcpu_sw_netstats __percpu *tstats;
1878 struct pcpu_dstats __percpu *dstats;
1879 struct pcpu_vstats __percpu *vstats;
1882 #if IS_ENABLED(CONFIG_GARP)
1883 struct garp_port __rcu *garp_port;
1885 #if IS_ENABLED(CONFIG_MRP)
1886 struct mrp_port __rcu *mrp_port;
1890 const struct attribute_group *sysfs_groups[4];
1891 const struct attribute_group *sysfs_rx_queue_group;
1893 const struct rtnl_link_ops *rtnl_link_ops;
1895 /* for setting kernel sock attribute on TCP connection setup */
1896 #define GSO_MAX_SIZE 65536
1897 unsigned int gso_max_size;
1898 #define GSO_MAX_SEGS 65535
1902 const struct dcbnl_rtnl_ops *dcbnl_ops;
1905 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1906 u8 prio_tc_map[TC_BITMASK + 1];
1908 #if IS_ENABLED(CONFIG_FCOE)
1909 unsigned int fcoe_ddp_xid;
1911 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1912 struct netprio_map __rcu *priomap;
1914 struct phy_device *phydev;
1915 struct lock_class_key *qdisc_tx_busylock;
1916 struct lock_class_key *qdisc_running_key;
1919 #define to_net_dev(d) container_of(d, struct net_device, dev)
1921 static inline bool netif_elide_gro(const struct net_device *dev)
1923 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
1928 #define NETDEV_ALIGN 32
1931 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1933 return dev->prio_tc_map[prio & TC_BITMASK];
1937 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1939 if (tc >= dev->num_tc)
1942 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1946 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
1947 void netdev_reset_tc(struct net_device *dev);
1948 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
1949 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
1952 int netdev_get_num_tc(struct net_device *dev)
1958 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1961 return &dev->_tx[index];
1964 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
1965 const struct sk_buff *skb)
1967 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
1970 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1971 void (*f)(struct net_device *,
1972 struct netdev_queue *,
1978 for (i = 0; i < dev->num_tx_queues; i++)
1979 f(dev, &dev->_tx[i], arg);
1982 #define netdev_lockdep_set_classes(dev) \
1984 static struct lock_class_key qdisc_tx_busylock_key; \
1985 static struct lock_class_key qdisc_running_key; \
1986 static struct lock_class_key qdisc_xmit_lock_key; \
1987 static struct lock_class_key dev_addr_list_lock_key; \
1990 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
1991 (dev)->qdisc_running_key = &qdisc_running_key; \
1992 lockdep_set_class(&(dev)->addr_list_lock, \
1993 &dev_addr_list_lock_key); \
1994 for (i = 0; i < (dev)->num_tx_queues; i++) \
1995 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
1996 &qdisc_xmit_lock_key); \
1999 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
2000 struct sk_buff *skb,
2003 /* returns the headroom that the master device needs to take in account
2004 * when forwarding to this dev
2006 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2008 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2011 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2013 if (dev->netdev_ops->ndo_set_rx_headroom)
2014 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2017 /* set the device rx headroom to the dev's default */
2018 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2020 netdev_set_rx_headroom(dev, -1);
2024 * Net namespace inlines
2027 struct net *dev_net(const struct net_device *dev)
2029 return read_pnet(&dev->nd_net);
2033 void dev_net_set(struct net_device *dev, struct net *net)
2035 write_pnet(&dev->nd_net, net);
2039 * netdev_priv - access network device private data
2040 * @dev: network device
2042 * Get network device private data
2044 static inline void *netdev_priv(const struct net_device *dev)
2046 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2049 /* Set the sysfs physical device reference for the network logical device
2050 * if set prior to registration will cause a symlink during initialization.
2052 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2054 /* Set the sysfs device type for the network logical device to allow
2055 * fine-grained identification of different network device types. For
2056 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2058 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2060 /* Default NAPI poll() weight
2061 * Device drivers are strongly advised to not use bigger value
2063 #define NAPI_POLL_WEIGHT 64
2066 * netif_napi_add - initialize a NAPI context
2067 * @dev: network device
2068 * @napi: NAPI context
2069 * @poll: polling function
2070 * @weight: default weight
2072 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2073 * *any* of the other NAPI-related functions.
2075 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2076 int (*poll)(struct napi_struct *, int), int weight);
2079 * netif_tx_napi_add - initialize a NAPI context
2080 * @dev: network device
2081 * @napi: NAPI context
2082 * @poll: polling function
2083 * @weight: default weight
2085 * This variant of netif_napi_add() should be used from drivers using NAPI
2086 * to exclusively poll a TX queue.
2087 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2089 static inline void netif_tx_napi_add(struct net_device *dev,
2090 struct napi_struct *napi,
2091 int (*poll)(struct napi_struct *, int),
2094 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2095 netif_napi_add(dev, napi, poll, weight);
2099 * netif_napi_del - remove a NAPI context
2100 * @napi: NAPI context
2102 * netif_napi_del() removes a NAPI context from the network device NAPI list
2104 void netif_napi_del(struct napi_struct *napi);
2106 struct napi_gro_cb {
2107 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2110 /* Length of frag0. */
2111 unsigned int frag0_len;
2113 /* This indicates where we are processing relative to skb->data. */
2116 /* This is non-zero if the packet cannot be merged with the new skb. */
2119 /* Save the IP ID here and check when we get to the transport layer */
2122 /* Number of segments aggregated. */
2125 /* Start offset for remote checksum offload */
2126 u16 gro_remcsum_start;
2128 /* jiffies when first packet was created/queued */
2131 /* Used in ipv6_gro_receive() and foo-over-udp */
2134 /* This is non-zero if the packet may be of the same flow. */
2137 /* Used in tunnel GRO receive */
2140 /* GRO checksum is valid */
2143 /* Number of checksums via CHECKSUM_UNNECESSARY */
2148 #define NAPI_GRO_FREE 1
2149 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2151 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2154 /* Used in GRE, set in fou/gue_gro_receive */
2157 /* Used to determine if flush_id can be ignored */
2160 /* Number of gro_receive callbacks this packet already went through */
2161 u8 recursion_counter:4;
2165 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2168 /* used in skb_gro_receive() slow path */
2169 struct sk_buff *last;
2172 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2174 #define GRO_RECURSION_LIMIT 15
2175 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2177 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2180 typedef struct sk_buff **(*gro_receive_t)(struct sk_buff **, struct sk_buff *);
2181 static inline struct sk_buff **call_gro_receive(gro_receive_t cb,
2182 struct sk_buff **head,
2183 struct sk_buff *skb)
2185 if (unlikely(gro_recursion_inc_test(skb))) {
2186 NAPI_GRO_CB(skb)->flush |= 1;
2190 return cb(head, skb);
2193 typedef struct sk_buff **(*gro_receive_sk_t)(struct sock *, struct sk_buff **,
2195 static inline struct sk_buff **call_gro_receive_sk(gro_receive_sk_t cb,
2197 struct sk_buff **head,
2198 struct sk_buff *skb)
2200 if (unlikely(gro_recursion_inc_test(skb))) {
2201 NAPI_GRO_CB(skb)->flush |= 1;
2205 return cb(sk, head, skb);
2208 struct packet_type {
2209 __be16 type; /* This is really htons(ether_type). */
2210 struct net_device *dev; /* NULL is wildcarded here */
2211 int (*func) (struct sk_buff *,
2212 struct net_device *,
2213 struct packet_type *,
2214 struct net_device *);
2215 bool (*id_match)(struct packet_type *ptype,
2217 void *af_packet_priv;
2218 struct list_head list;
2221 struct offload_callbacks {
2222 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2223 netdev_features_t features);
2224 struct sk_buff **(*gro_receive)(struct sk_buff **head,
2225 struct sk_buff *skb);
2226 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2229 struct packet_offload {
2230 __be16 type; /* This is really htons(ether_type). */
2232 struct offload_callbacks callbacks;
2233 struct list_head list;
2236 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2237 struct pcpu_sw_netstats {
2242 struct u64_stats_sync syncp;
2245 #define __netdev_alloc_pcpu_stats(type, gfp) \
2247 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2250 for_each_possible_cpu(__cpu) { \
2251 typeof(type) *stat; \
2252 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2253 u64_stats_init(&stat->syncp); \
2259 #define netdev_alloc_pcpu_stats(type) \
2260 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2262 enum netdev_lag_tx_type {
2263 NETDEV_LAG_TX_TYPE_UNKNOWN,
2264 NETDEV_LAG_TX_TYPE_RANDOM,
2265 NETDEV_LAG_TX_TYPE_BROADCAST,
2266 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2267 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2268 NETDEV_LAG_TX_TYPE_HASH,
2271 struct netdev_lag_upper_info {
2272 enum netdev_lag_tx_type tx_type;
2275 struct netdev_lag_lower_state_info {
2280 #include <linux/notifier.h>
2282 /* netdevice notifier chain. Please remember to update the rtnetlink
2283 * notification exclusion list in rtnetlink_event() when adding new
2286 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
2287 #define NETDEV_DOWN 0x0002
2288 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
2289 detected a hardware crash and restarted
2290 - we can use this eg to kick tcp sessions
2292 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
2293 #define NETDEV_REGISTER 0x0005
2294 #define NETDEV_UNREGISTER 0x0006
2295 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
2296 #define NETDEV_CHANGEADDR 0x0008
2297 #define NETDEV_GOING_DOWN 0x0009
2298 #define NETDEV_CHANGENAME 0x000A
2299 #define NETDEV_FEAT_CHANGE 0x000B
2300 #define NETDEV_BONDING_FAILOVER 0x000C
2301 #define NETDEV_PRE_UP 0x000D
2302 #define NETDEV_PRE_TYPE_CHANGE 0x000E
2303 #define NETDEV_POST_TYPE_CHANGE 0x000F
2304 #define NETDEV_POST_INIT 0x0010
2305 #define NETDEV_UNREGISTER_FINAL 0x0011
2306 #define NETDEV_RELEASE 0x0012
2307 #define NETDEV_NOTIFY_PEERS 0x0013
2308 #define NETDEV_JOIN 0x0014
2309 #define NETDEV_CHANGEUPPER 0x0015
2310 #define NETDEV_RESEND_IGMP 0x0016
2311 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2312 #define NETDEV_CHANGEINFODATA 0x0018
2313 #define NETDEV_BONDING_INFO 0x0019
2314 #define NETDEV_PRECHANGEUPPER 0x001A
2315 #define NETDEV_CHANGELOWERSTATE 0x001B
2316 #define NETDEV_UDP_TUNNEL_PUSH_INFO 0x001C
2317 #define NETDEV_CHANGE_TX_QUEUE_LEN 0x001E
2319 int register_netdevice_notifier(struct notifier_block *nb);
2320 int unregister_netdevice_notifier(struct notifier_block *nb);
2322 struct netdev_notifier_info {
2323 struct net_device *dev;
2326 struct netdev_notifier_change_info {
2327 struct netdev_notifier_info info; /* must be first */
2328 unsigned int flags_changed;
2331 struct netdev_notifier_changeupper_info {
2332 struct netdev_notifier_info info; /* must be first */
2333 struct net_device *upper_dev; /* new upper dev */
2334 bool master; /* is upper dev master */
2335 bool linking; /* is the notification for link or unlink */
2336 void *upper_info; /* upper dev info */
2339 struct netdev_notifier_changelowerstate_info {
2340 struct netdev_notifier_info info; /* must be first */
2341 void *lower_state_info; /* is lower dev state */
2344 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2345 struct net_device *dev)
2350 static inline struct net_device *
2351 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2356 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2359 extern rwlock_t dev_base_lock; /* Device list lock */
2361 #define for_each_netdev(net, d) \
2362 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2363 #define for_each_netdev_reverse(net, d) \
2364 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2365 #define for_each_netdev_rcu(net, d) \
2366 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2367 #define for_each_netdev_safe(net, d, n) \
2368 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2369 #define for_each_netdev_continue(net, d) \
2370 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2371 #define for_each_netdev_continue_rcu(net, d) \
2372 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2373 #define for_each_netdev_in_bond_rcu(bond, slave) \
2374 for_each_netdev_rcu(&init_net, slave) \
2375 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2376 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2378 static inline struct net_device *next_net_device(struct net_device *dev)
2380 struct list_head *lh;
2384 lh = dev->dev_list.next;
2385 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2388 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2390 struct list_head *lh;
2394 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2395 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2398 static inline struct net_device *first_net_device(struct net *net)
2400 return list_empty(&net->dev_base_head) ? NULL :
2401 net_device_entry(net->dev_base_head.next);
2404 static inline struct net_device *first_net_device_rcu(struct net *net)
2406 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2408 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2411 int netdev_boot_setup_check(struct net_device *dev);
2412 unsigned long netdev_boot_base(const char *prefix, int unit);
2413 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2414 const char *hwaddr);
2415 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2416 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2417 void dev_add_pack(struct packet_type *pt);
2418 void dev_remove_pack(struct packet_type *pt);
2419 void __dev_remove_pack(struct packet_type *pt);
2420 void dev_add_offload(struct packet_offload *po);
2421 void dev_remove_offload(struct packet_offload *po);
2423 int dev_get_iflink(const struct net_device *dev);
2424 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2425 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2426 unsigned short mask);
2427 struct net_device *dev_get_by_name(struct net *net, const char *name);
2428 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2429 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2430 int dev_alloc_name(struct net_device *dev, const char *name);
2431 int dev_open(struct net_device *dev);
2432 int dev_close(struct net_device *dev);
2433 int dev_close_many(struct list_head *head, bool unlink);
2434 void dev_disable_lro(struct net_device *dev);
2435 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2436 int dev_queue_xmit(struct sk_buff *skb);
2437 int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2438 int register_netdevice(struct net_device *dev);
2439 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2440 void unregister_netdevice_many(struct list_head *head);
2441 static inline void unregister_netdevice(struct net_device *dev)
2443 unregister_netdevice_queue(dev, NULL);
2446 int netdev_refcnt_read(const struct net_device *dev);
2447 void free_netdev(struct net_device *dev);
2448 void netdev_freemem(struct net_device *dev);
2449 void synchronize_net(void);
2450 int init_dummy_netdev(struct net_device *dev);
2452 DECLARE_PER_CPU(int, xmit_recursion);
2453 #define XMIT_RECURSION_LIMIT 10
2455 static inline int dev_recursion_level(void)
2457 return this_cpu_read(xmit_recursion);
2460 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2461 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2462 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2463 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2464 int netdev_get_name(struct net *net, char *name, int ifindex);
2465 int dev_restart(struct net_device *dev);
2466 int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2468 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2470 return NAPI_GRO_CB(skb)->data_offset;
2473 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2475 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2478 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2480 NAPI_GRO_CB(skb)->data_offset += len;
2483 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2484 unsigned int offset)
2486 return NAPI_GRO_CB(skb)->frag0 + offset;
2489 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2491 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2494 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2496 NAPI_GRO_CB(skb)->frag0 = NULL;
2497 NAPI_GRO_CB(skb)->frag0_len = 0;
2500 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2501 unsigned int offset)
2503 if (!pskb_may_pull(skb, hlen))
2506 skb_gro_frag0_invalidate(skb);
2507 return skb->data + offset;
2510 static inline void *skb_gro_network_header(struct sk_buff *skb)
2512 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2513 skb_network_offset(skb);
2516 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2517 const void *start, unsigned int len)
2519 if (NAPI_GRO_CB(skb)->csum_valid)
2520 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2521 csum_partial(start, len, 0));
2524 /* GRO checksum functions. These are logical equivalents of the normal
2525 * checksum functions (in skbuff.h) except that they operate on the GRO
2526 * offsets and fields in sk_buff.
2529 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2531 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2533 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2536 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2540 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2541 skb_checksum_start_offset(skb) <
2542 skb_gro_offset(skb)) &&
2543 !skb_at_gro_remcsum_start(skb) &&
2544 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2545 (!zero_okay || check));
2548 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2551 if (NAPI_GRO_CB(skb)->csum_valid &&
2552 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2555 NAPI_GRO_CB(skb)->csum = psum;
2557 return __skb_gro_checksum_complete(skb);
2560 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2562 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2563 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2564 NAPI_GRO_CB(skb)->csum_cnt--;
2566 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2567 * verified a new top level checksum or an encapsulated one
2568 * during GRO. This saves work if we fallback to normal path.
2570 __skb_incr_checksum_unnecessary(skb);
2574 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2577 __sum16 __ret = 0; \
2578 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2579 __ret = __skb_gro_checksum_validate_complete(skb, \
2580 compute_pseudo(skb, proto)); \
2582 skb_gro_incr_csum_unnecessary(skb); \
2586 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2587 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2589 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2591 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2593 #define skb_gro_checksum_simple_validate(skb) \
2594 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2596 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2598 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2599 !NAPI_GRO_CB(skb)->csum_valid);
2602 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2603 __sum16 check, __wsum pseudo)
2605 NAPI_GRO_CB(skb)->csum = ~pseudo;
2606 NAPI_GRO_CB(skb)->csum_valid = 1;
2609 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2611 if (__skb_gro_checksum_convert_check(skb)) \
2612 __skb_gro_checksum_convert(skb, check, \
2613 compute_pseudo(skb, proto)); \
2616 struct gro_remcsum {
2621 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2627 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2628 unsigned int off, size_t hdrlen,
2629 int start, int offset,
2630 struct gro_remcsum *grc,
2634 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2636 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2639 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2643 ptr = skb_gro_header_fast(skb, off);
2644 if (skb_gro_header_hard(skb, off + plen)) {
2645 ptr = skb_gro_header_slow(skb, off + plen, off);
2650 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2653 /* Adjust skb->csum since we changed the packet */
2654 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2656 grc->offset = off + hdrlen + offset;
2662 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2663 struct gro_remcsum *grc)
2666 size_t plen = grc->offset + sizeof(u16);
2671 ptr = skb_gro_header_fast(skb, grc->offset);
2672 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2673 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2678 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2681 #ifdef CONFIG_XFRM_OFFLOAD
2682 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush)
2684 if (PTR_ERR(pp) != -EINPROGRESS)
2685 NAPI_GRO_CB(skb)->flush |= flush;
2688 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush)
2690 NAPI_GRO_CB(skb)->flush |= flush;
2694 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2695 unsigned short type,
2696 const void *daddr, const void *saddr,
2699 if (!dev->header_ops || !dev->header_ops->create)
2702 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2705 static inline int dev_parse_header(const struct sk_buff *skb,
2706 unsigned char *haddr)
2708 const struct net_device *dev = skb->dev;
2710 if (!dev->header_ops || !dev->header_ops->parse)
2712 return dev->header_ops->parse(skb, haddr);
2715 /* ll_header must have at least hard_header_len allocated */
2716 static inline bool dev_validate_header(const struct net_device *dev,
2717 char *ll_header, int len)
2719 if (likely(len >= dev->hard_header_len))
2721 if (len < dev->min_header_len)
2724 if (capable(CAP_SYS_RAWIO)) {
2725 memset(ll_header + len, 0, dev->hard_header_len - len);
2729 if (dev->header_ops && dev->header_ops->validate)
2730 return dev->header_ops->validate(ll_header, len);
2735 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2736 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2737 static inline int unregister_gifconf(unsigned int family)
2739 return register_gifconf(family, NULL);
2742 #ifdef CONFIG_NET_FLOW_LIMIT
2743 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2744 struct sd_flow_limit {
2746 unsigned int num_buckets;
2747 unsigned int history_head;
2748 u16 history[FLOW_LIMIT_HISTORY];
2752 extern int netdev_flow_limit_table_len;
2753 #endif /* CONFIG_NET_FLOW_LIMIT */
2756 * Incoming packets are placed on per-CPU queues
2758 struct softnet_data {
2759 struct list_head poll_list;
2760 struct sk_buff_head process_queue;
2763 unsigned int processed;
2764 unsigned int time_squeeze;
2765 unsigned int received_rps;
2767 struct softnet_data *rps_ipi_list;
2769 #ifdef CONFIG_NET_FLOW_LIMIT
2770 struct sd_flow_limit __rcu *flow_limit;
2772 struct Qdisc *output_queue;
2773 struct Qdisc **output_queue_tailp;
2774 struct sk_buff *completion_queue;
2777 /* input_queue_head should be written by cpu owning this struct,
2778 * and only read by other cpus. Worth using a cache line.
2780 unsigned int input_queue_head ____cacheline_aligned_in_smp;
2782 /* Elements below can be accessed between CPUs for RPS/RFS */
2783 struct call_single_data csd ____cacheline_aligned_in_smp;
2784 struct softnet_data *rps_ipi_next;
2786 unsigned int input_queue_tail;
2788 unsigned int dropped;
2789 struct sk_buff_head input_pkt_queue;
2790 struct napi_struct backlog;
2794 static inline void input_queue_head_incr(struct softnet_data *sd)
2797 sd->input_queue_head++;
2801 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2802 unsigned int *qtail)
2805 *qtail = ++sd->input_queue_tail;
2809 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2811 void __netif_schedule(struct Qdisc *q);
2812 void netif_schedule_queue(struct netdev_queue *txq);
2814 static inline void netif_tx_schedule_all(struct net_device *dev)
2818 for (i = 0; i < dev->num_tx_queues; i++)
2819 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2822 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2824 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2828 * netif_start_queue - allow transmit
2829 * @dev: network device
2831 * Allow upper layers to call the device hard_start_xmit routine.
2833 static inline void netif_start_queue(struct net_device *dev)
2835 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2838 static inline void netif_tx_start_all_queues(struct net_device *dev)
2842 for (i = 0; i < dev->num_tx_queues; i++) {
2843 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2844 netif_tx_start_queue(txq);
2848 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2851 * netif_wake_queue - restart transmit
2852 * @dev: network device
2854 * Allow upper layers to call the device hard_start_xmit routine.
2855 * Used for flow control when transmit resources are available.
2857 static inline void netif_wake_queue(struct net_device *dev)
2859 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2862 static inline void netif_tx_wake_all_queues(struct net_device *dev)
2866 for (i = 0; i < dev->num_tx_queues; i++) {
2867 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2868 netif_tx_wake_queue(txq);
2872 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2874 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2878 * netif_stop_queue - stop transmitted packets
2879 * @dev: network device
2881 * Stop upper layers calling the device hard_start_xmit routine.
2882 * Used for flow control when transmit resources are unavailable.
2884 static inline void netif_stop_queue(struct net_device *dev)
2886 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2889 void netif_tx_stop_all_queues(struct net_device *dev);
2891 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2893 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2897 * netif_queue_stopped - test if transmit queue is flowblocked
2898 * @dev: network device
2900 * Test if transmit queue on device is currently unable to send.
2902 static inline bool netif_queue_stopped(const struct net_device *dev)
2904 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2907 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2909 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2913 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2915 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2919 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2921 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2925 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2926 * @dev_queue: pointer to transmit queue
2928 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2929 * to give appropriate hint to the CPU.
2931 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2934 prefetchw(&dev_queue->dql.num_queued);
2939 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2940 * @dev_queue: pointer to transmit queue
2942 * BQL enabled drivers might use this helper in their TX completion path,
2943 * to give appropriate hint to the CPU.
2945 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
2948 prefetchw(&dev_queue->dql.limit);
2952 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2956 dql_queued(&dev_queue->dql, bytes);
2958 if (likely(dql_avail(&dev_queue->dql) >= 0))
2961 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2964 * The XOFF flag must be set before checking the dql_avail below,
2965 * because in netdev_tx_completed_queue we update the dql_completed
2966 * before checking the XOFF flag.
2970 /* check again in case another CPU has just made room avail */
2971 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2972 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2977 * netdev_sent_queue - report the number of bytes queued to hardware
2978 * @dev: network device
2979 * @bytes: number of bytes queued to the hardware device queue
2981 * Report the number of bytes queued for sending/completion to the network
2982 * device hardware queue. @bytes should be a good approximation and should
2983 * exactly match netdev_completed_queue() @bytes
2985 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2987 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2990 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2991 unsigned int pkts, unsigned int bytes)
2994 if (unlikely(!bytes))
2997 dql_completed(&dev_queue->dql, bytes);
3000 * Without the memory barrier there is a small possiblity that
3001 * netdev_tx_sent_queue will miss the update and cause the queue to
3002 * be stopped forever
3006 if (dql_avail(&dev_queue->dql) < 0)
3009 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3010 netif_schedule_queue(dev_queue);
3015 * netdev_completed_queue - report bytes and packets completed by device
3016 * @dev: network device
3017 * @pkts: actual number of packets sent over the medium
3018 * @bytes: actual number of bytes sent over the medium
3020 * Report the number of bytes and packets transmitted by the network device
3021 * hardware queue over the physical medium, @bytes must exactly match the
3022 * @bytes amount passed to netdev_sent_queue()
3024 static inline void netdev_completed_queue(struct net_device *dev,
3025 unsigned int pkts, unsigned int bytes)
3027 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3030 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3033 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3039 * netdev_reset_queue - reset the packets and bytes count of a network device
3040 * @dev_queue: network device
3042 * Reset the bytes and packet count of a network device and clear the
3043 * software flow control OFF bit for this network device
3045 static inline void netdev_reset_queue(struct net_device *dev_queue)
3047 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3051 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3052 * @dev: network device
3053 * @queue_index: given tx queue index
3055 * Returns 0 if given tx queue index >= number of device tx queues,
3056 * otherwise returns the originally passed tx queue index.
3058 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3060 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3061 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3062 dev->name, queue_index,
3063 dev->real_num_tx_queues);
3071 * netif_running - test if up
3072 * @dev: network device
3074 * Test if the device has been brought up.
3076 static inline bool netif_running(const struct net_device *dev)
3078 return test_bit(__LINK_STATE_START, &dev->state);
3082 * Routines to manage the subqueues on a device. We only need start,
3083 * stop, and a check if it's stopped. All other device management is
3084 * done at the overall netdevice level.
3085 * Also test the device if we're multiqueue.
3089 * netif_start_subqueue - allow sending packets on subqueue
3090 * @dev: network device
3091 * @queue_index: sub queue index
3093 * Start individual transmit queue of a device with multiple transmit queues.
3095 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3097 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3099 netif_tx_start_queue(txq);
3103 * netif_stop_subqueue - stop sending packets on subqueue
3104 * @dev: network device
3105 * @queue_index: sub queue index
3107 * Stop individual transmit queue of a device with multiple transmit queues.
3109 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3111 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3112 netif_tx_stop_queue(txq);
3116 * netif_subqueue_stopped - test status of subqueue
3117 * @dev: network device
3118 * @queue_index: sub queue index
3120 * Check individual transmit queue of a device with multiple transmit queues.
3122 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3125 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3127 return netif_tx_queue_stopped(txq);
3130 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3131 struct sk_buff *skb)
3133 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3137 * netif_wake_subqueue - allow sending packets on subqueue
3138 * @dev: network device
3139 * @queue_index: sub queue index
3141 * Resume individual transmit queue of a device with multiple transmit queues.
3143 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3145 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3147 netif_tx_wake_queue(txq);
3151 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3154 static inline int netif_set_xps_queue(struct net_device *dev,
3155 const struct cpumask *mask,
3162 u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
3163 unsigned int num_tx_queues);
3166 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
3167 * as a distribution range limit for the returned value.
3169 static inline u16 skb_tx_hash(const struct net_device *dev,
3170 struct sk_buff *skb)
3172 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
3176 * netif_is_multiqueue - test if device has multiple transmit queues
3177 * @dev: network device
3179 * Check if device has multiple transmit queues
3181 static inline bool netif_is_multiqueue(const struct net_device *dev)
3183 return dev->num_tx_queues > 1;
3186 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3189 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3191 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3199 static inline unsigned int get_netdev_rx_queue_index(
3200 struct netdev_rx_queue *queue)
3202 struct net_device *dev = queue->dev;
3203 int index = queue - dev->_rx;
3205 BUG_ON(index >= dev->num_rx_queues);
3210 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3211 int netif_get_num_default_rss_queues(void);
3213 enum skb_free_reason {
3214 SKB_REASON_CONSUMED,
3218 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3219 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3222 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3223 * interrupt context or with hardware interrupts being disabled.
3224 * (in_irq() || irqs_disabled())
3226 * We provide four helpers that can be used in following contexts :
3228 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3229 * replacing kfree_skb(skb)
3231 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3232 * Typically used in place of consume_skb(skb) in TX completion path
3234 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3235 * replacing kfree_skb(skb)
3237 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3238 * and consumed a packet. Used in place of consume_skb(skb)
3240 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3242 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3245 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3247 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3250 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3252 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3255 static inline void dev_consume_skb_any(struct sk_buff *skb)
3257 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3260 int netif_rx(struct sk_buff *skb);
3261 int netif_rx_ni(struct sk_buff *skb);
3262 int netif_receive_skb(struct sk_buff *skb);
3263 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3264 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3265 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3266 gro_result_t napi_gro_frags(struct napi_struct *napi);
3267 struct packet_offload *gro_find_receive_by_type(__be16 type);
3268 struct packet_offload *gro_find_complete_by_type(__be16 type);
3270 static inline void napi_free_frags(struct napi_struct *napi)
3272 kfree_skb(napi->skb);
3276 bool netdev_is_rx_handler_busy(struct net_device *dev);
3277 int netdev_rx_handler_register(struct net_device *dev,
3278 rx_handler_func_t *rx_handler,
3279 void *rx_handler_data);
3280 void netdev_rx_handler_unregister(struct net_device *dev);
3282 bool dev_valid_name(const char *name);
3283 int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
3284 int dev_ethtool(struct net *net, struct ifreq *);
3285 unsigned int dev_get_flags(const struct net_device *);
3286 int __dev_change_flags(struct net_device *, unsigned int flags);
3287 int dev_change_flags(struct net_device *, unsigned int);
3288 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3289 unsigned int gchanges);
3290 int dev_change_name(struct net_device *, const char *);
3291 int dev_set_alias(struct net_device *, const char *, size_t);
3292 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3293 int __dev_set_mtu(struct net_device *, int);
3294 int dev_set_mtu(struct net_device *, int);
3295 void dev_set_group(struct net_device *, int);
3296 int dev_set_mac_address(struct net_device *, struct sockaddr *);
3297 int dev_change_carrier(struct net_device *, bool new_carrier);
3298 int dev_get_phys_port_id(struct net_device *dev,
3299 struct netdev_phys_item_id *ppid);
3300 int dev_get_phys_port_name(struct net_device *dev,
3301 char *name, size_t len);
3302 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3303 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
3304 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3305 struct netdev_queue *txq, int *ret);
3307 typedef int (*xdp_op_t)(struct net_device *dev, struct netdev_xdp *xdp);
3308 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3310 u8 __dev_xdp_attached(struct net_device *dev, xdp_op_t xdp_op, u32 *prog_id);
3312 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3313 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3314 bool is_skb_forwardable(const struct net_device *dev,
3315 const struct sk_buff *skb);
3317 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3318 struct sk_buff *skb)
3320 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3321 unlikely(!is_skb_forwardable(dev, skb))) {
3322 atomic_long_inc(&dev->rx_dropped);
3327 skb_scrub_packet(skb, true);
3332 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3334 extern int netdev_budget;
3335 extern unsigned int netdev_budget_usecs;
3337 /* Called by rtnetlink.c:rtnl_unlock() */
3338 void netdev_run_todo(void);
3341 * dev_put - release reference to device
3342 * @dev: network device
3344 * Release reference to device to allow it to be freed.
3346 static inline void dev_put(struct net_device *dev)
3348 this_cpu_dec(*dev->pcpu_refcnt);
3352 * dev_hold - get reference to device
3353 * @dev: network device
3355 * Hold reference to device to keep it from being freed.
3357 static inline void dev_hold(struct net_device *dev)
3359 this_cpu_inc(*dev->pcpu_refcnt);
3362 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3363 * and _off may be called from IRQ context, but it is caller
3364 * who is responsible for serialization of these calls.
3366 * The name carrier is inappropriate, these functions should really be
3367 * called netif_lowerlayer_*() because they represent the state of any
3368 * kind of lower layer not just hardware media.
3371 void linkwatch_init_dev(struct net_device *dev);
3372 void linkwatch_fire_event(struct net_device *dev);
3373 void linkwatch_forget_dev(struct net_device *dev);
3376 * netif_carrier_ok - test if carrier present
3377 * @dev: network device
3379 * Check if carrier is present on device
3381 static inline bool netif_carrier_ok(const struct net_device *dev)
3383 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3386 unsigned long dev_trans_start(struct net_device *dev);
3388 void __netdev_watchdog_up(struct net_device *dev);
3390 void netif_carrier_on(struct net_device *dev);
3392 void netif_carrier_off(struct net_device *dev);
3395 * netif_dormant_on - mark device as dormant.
3396 * @dev: network device
3398 * Mark device as dormant (as per RFC2863).
3400 * The dormant state indicates that the relevant interface is not
3401 * actually in a condition to pass packets (i.e., it is not 'up') but is
3402 * in a "pending" state, waiting for some external event. For "on-
3403 * demand" interfaces, this new state identifies the situation where the
3404 * interface is waiting for events to place it in the up state.
3406 static inline void netif_dormant_on(struct net_device *dev)
3408 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3409 linkwatch_fire_event(dev);
3413 * netif_dormant_off - set device as not dormant.
3414 * @dev: network device
3416 * Device is not in dormant state.
3418 static inline void netif_dormant_off(struct net_device *dev)
3420 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3421 linkwatch_fire_event(dev);
3425 * netif_dormant - test if device is dormant
3426 * @dev: network device
3428 * Check if device is dormant.
3430 static inline bool netif_dormant(const struct net_device *dev)
3432 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3437 * netif_oper_up - test if device is operational
3438 * @dev: network device
3440 * Check if carrier is operational
3442 static inline bool netif_oper_up(const struct net_device *dev)
3444 return (dev->operstate == IF_OPER_UP ||
3445 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3449 * netif_device_present - is device available or removed
3450 * @dev: network device
3452 * Check if device has not been removed from system.
3454 static inline bool netif_device_present(struct net_device *dev)
3456 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3459 void netif_device_detach(struct net_device *dev);
3461 void netif_device_attach(struct net_device *dev);
3464 * Network interface message level settings
3468 NETIF_MSG_DRV = 0x0001,
3469 NETIF_MSG_PROBE = 0x0002,
3470 NETIF_MSG_LINK = 0x0004,
3471 NETIF_MSG_TIMER = 0x0008,
3472 NETIF_MSG_IFDOWN = 0x0010,
3473 NETIF_MSG_IFUP = 0x0020,
3474 NETIF_MSG_RX_ERR = 0x0040,
3475 NETIF_MSG_TX_ERR = 0x0080,
3476 NETIF_MSG_TX_QUEUED = 0x0100,
3477 NETIF_MSG_INTR = 0x0200,
3478 NETIF_MSG_TX_DONE = 0x0400,
3479 NETIF_MSG_RX_STATUS = 0x0800,
3480 NETIF_MSG_PKTDATA = 0x1000,
3481 NETIF_MSG_HW = 0x2000,
3482 NETIF_MSG_WOL = 0x4000,
3485 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3486 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3487 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3488 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3489 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3490 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3491 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3492 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3493 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3494 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3495 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3496 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3497 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3498 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3499 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3501 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3504 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3505 return default_msg_enable_bits;
3506 if (debug_value == 0) /* no output */
3508 /* set low N bits */
3509 return (1 << debug_value) - 1;
3512 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3514 spin_lock(&txq->_xmit_lock);
3515 txq->xmit_lock_owner = cpu;
3518 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
3520 __acquire(&txq->_xmit_lock);
3524 static inline void __netif_tx_release(struct netdev_queue *txq)
3526 __release(&txq->_xmit_lock);
3529 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3531 spin_lock_bh(&txq->_xmit_lock);
3532 txq->xmit_lock_owner = smp_processor_id();
3535 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3537 bool ok = spin_trylock(&txq->_xmit_lock);
3539 txq->xmit_lock_owner = smp_processor_id();
3543 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3545 txq->xmit_lock_owner = -1;
3546 spin_unlock(&txq->_xmit_lock);
3549 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3551 txq->xmit_lock_owner = -1;
3552 spin_unlock_bh(&txq->_xmit_lock);
3555 static inline void txq_trans_update(struct netdev_queue *txq)
3557 if (txq->xmit_lock_owner != -1)
3558 txq->trans_start = jiffies;
3561 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
3562 static inline void netif_trans_update(struct net_device *dev)
3564 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
3566 if (txq->trans_start != jiffies)
3567 txq->trans_start = jiffies;
3571 * netif_tx_lock - grab network device transmit lock
3572 * @dev: network device
3574 * Get network device transmit lock
3576 static inline void netif_tx_lock(struct net_device *dev)
3581 spin_lock(&dev->tx_global_lock);
3582 cpu = smp_processor_id();
3583 for (i = 0; i < dev->num_tx_queues; i++) {
3584 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3586 /* We are the only thread of execution doing a
3587 * freeze, but we have to grab the _xmit_lock in
3588 * order to synchronize with threads which are in
3589 * the ->hard_start_xmit() handler and already
3590 * checked the frozen bit.
3592 __netif_tx_lock(txq, cpu);
3593 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3594 __netif_tx_unlock(txq);
3598 static inline void netif_tx_lock_bh(struct net_device *dev)
3604 static inline void netif_tx_unlock(struct net_device *dev)
3608 for (i = 0; i < dev->num_tx_queues; i++) {
3609 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3611 /* No need to grab the _xmit_lock here. If the
3612 * queue is not stopped for another reason, we
3615 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3616 netif_schedule_queue(txq);
3618 spin_unlock(&dev->tx_global_lock);
3621 static inline void netif_tx_unlock_bh(struct net_device *dev)
3623 netif_tx_unlock(dev);
3627 #define HARD_TX_LOCK(dev, txq, cpu) { \
3628 if ((dev->features & NETIF_F_LLTX) == 0) { \
3629 __netif_tx_lock(txq, cpu); \
3631 __netif_tx_acquire(txq); \
3635 #define HARD_TX_TRYLOCK(dev, txq) \
3636 (((dev->features & NETIF_F_LLTX) == 0) ? \
3637 __netif_tx_trylock(txq) : \
3638 __netif_tx_acquire(txq))
3640 #define HARD_TX_UNLOCK(dev, txq) { \
3641 if ((dev->features & NETIF_F_LLTX) == 0) { \
3642 __netif_tx_unlock(txq); \
3644 __netif_tx_release(txq); \
3648 static inline void netif_tx_disable(struct net_device *dev)
3654 cpu = smp_processor_id();
3655 for (i = 0; i < dev->num_tx_queues; i++) {
3656 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3658 __netif_tx_lock(txq, cpu);
3659 netif_tx_stop_queue(txq);
3660 __netif_tx_unlock(txq);
3665 static inline void netif_addr_lock(struct net_device *dev)
3667 spin_lock(&dev->addr_list_lock);
3670 static inline void netif_addr_lock_nested(struct net_device *dev)
3672 int subclass = SINGLE_DEPTH_NESTING;
3674 if (dev->netdev_ops->ndo_get_lock_subclass)
3675 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3677 spin_lock_nested(&dev->addr_list_lock, subclass);
3680 static inline void netif_addr_lock_bh(struct net_device *dev)
3682 spin_lock_bh(&dev->addr_list_lock);
3685 static inline void netif_addr_unlock(struct net_device *dev)
3687 spin_unlock(&dev->addr_list_lock);
3690 static inline void netif_addr_unlock_bh(struct net_device *dev)
3692 spin_unlock_bh(&dev->addr_list_lock);
3696 * dev_addrs walker. Should be used only for read access. Call with
3697 * rcu_read_lock held.
3699 #define for_each_dev_addr(dev, ha) \
3700 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3702 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3704 void ether_setup(struct net_device *dev);
3706 /* Support for loadable net-drivers */
3707 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3708 unsigned char name_assign_type,
3709 void (*setup)(struct net_device *),
3710 unsigned int txqs, unsigned int rxqs);
3711 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3712 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3714 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3715 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3718 int register_netdev(struct net_device *dev);
3719 void unregister_netdev(struct net_device *dev);
3721 /* General hardware address lists handling functions */
3722 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3723 struct netdev_hw_addr_list *from_list, int addr_len);
3724 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3725 struct netdev_hw_addr_list *from_list, int addr_len);
3726 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3727 struct net_device *dev,
3728 int (*sync)(struct net_device *, const unsigned char *),
3729 int (*unsync)(struct net_device *,
3730 const unsigned char *));
3731 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3732 struct net_device *dev,
3733 int (*unsync)(struct net_device *,
3734 const unsigned char *));
3735 void __hw_addr_init(struct netdev_hw_addr_list *list);
3737 /* Functions used for device addresses handling */
3738 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3739 unsigned char addr_type);
3740 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3741 unsigned char addr_type);
3742 void dev_addr_flush(struct net_device *dev);
3743 int dev_addr_init(struct net_device *dev);
3745 /* Functions used for unicast addresses handling */
3746 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3747 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3748 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3749 int dev_uc_sync(struct net_device *to, struct net_device *from);
3750 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3751 void dev_uc_unsync(struct net_device *to, struct net_device *from);
3752 void dev_uc_flush(struct net_device *dev);
3753 void dev_uc_init(struct net_device *dev);
3756 * __dev_uc_sync - Synchonize device's unicast list
3757 * @dev: device to sync
3758 * @sync: function to call if address should be added
3759 * @unsync: function to call if address should be removed
3761 * Add newly added addresses to the interface, and release
3762 * addresses that have been deleted.
3764 static inline int __dev_uc_sync(struct net_device *dev,
3765 int (*sync)(struct net_device *,
3766 const unsigned char *),
3767 int (*unsync)(struct net_device *,
3768 const unsigned char *))
3770 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3774 * __dev_uc_unsync - Remove synchronized addresses from device
3775 * @dev: device to sync
3776 * @unsync: function to call if address should be removed
3778 * Remove all addresses that were added to the device by dev_uc_sync().
3780 static inline void __dev_uc_unsync(struct net_device *dev,
3781 int (*unsync)(struct net_device *,
3782 const unsigned char *))
3784 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3787 /* Functions used for multicast addresses handling */
3788 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3789 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3790 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3791 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3792 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3793 int dev_mc_sync(struct net_device *to, struct net_device *from);
3794 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3795 void dev_mc_unsync(struct net_device *to, struct net_device *from);
3796 void dev_mc_flush(struct net_device *dev);
3797 void dev_mc_init(struct net_device *dev);
3800 * __dev_mc_sync - Synchonize device's multicast list
3801 * @dev: device to sync
3802 * @sync: function to call if address should be added
3803 * @unsync: function to call if address should be removed
3805 * Add newly added addresses to the interface, and release
3806 * addresses that have been deleted.
3808 static inline int __dev_mc_sync(struct net_device *dev,
3809 int (*sync)(struct net_device *,
3810 const unsigned char *),
3811 int (*unsync)(struct net_device *,
3812 const unsigned char *))
3814 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3818 * __dev_mc_unsync - Remove synchronized addresses from device
3819 * @dev: device to sync
3820 * @unsync: function to call if address should be removed
3822 * Remove all addresses that were added to the device by dev_mc_sync().
3824 static inline void __dev_mc_unsync(struct net_device *dev,
3825 int (*unsync)(struct net_device *,
3826 const unsigned char *))
3828 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3831 /* Functions used for secondary unicast and multicast support */
3832 void dev_set_rx_mode(struct net_device *dev);
3833 void __dev_set_rx_mode(struct net_device *dev);
3834 int dev_set_promiscuity(struct net_device *dev, int inc);
3835 int dev_set_allmulti(struct net_device *dev, int inc);
3836 void netdev_state_change(struct net_device *dev);
3837 void netdev_notify_peers(struct net_device *dev);
3838 void netdev_features_change(struct net_device *dev);
3839 /* Load a device via the kmod */
3840 void dev_load(struct net *net, const char *name);
3841 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3842 struct rtnl_link_stats64 *storage);
3843 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3844 const struct net_device_stats *netdev_stats);
3846 extern int netdev_max_backlog;
3847 extern int netdev_tstamp_prequeue;
3848 extern int weight_p;
3849 extern int dev_weight_rx_bias;
3850 extern int dev_weight_tx_bias;
3851 extern int dev_rx_weight;
3852 extern int dev_tx_weight;
3854 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3855 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3856 struct list_head **iter);
3857 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3858 struct list_head **iter);
3860 /* iterate through upper list, must be called under RCU read lock */
3861 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3862 for (iter = &(dev)->adj_list.upper, \
3863 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3865 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3867 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
3868 int (*fn)(struct net_device *upper_dev,
3872 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
3873 struct net_device *upper_dev);
3875 void *netdev_lower_get_next_private(struct net_device *dev,
3876 struct list_head **iter);
3877 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3878 struct list_head **iter);
3880 #define netdev_for_each_lower_private(dev, priv, iter) \
3881 for (iter = (dev)->adj_list.lower.next, \
3882 priv = netdev_lower_get_next_private(dev, &(iter)); \
3884 priv = netdev_lower_get_next_private(dev, &(iter)))
3886 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3887 for (iter = &(dev)->adj_list.lower, \
3888 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3890 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3892 void *netdev_lower_get_next(struct net_device *dev,
3893 struct list_head **iter);
3895 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3896 for (iter = (dev)->adj_list.lower.next, \
3897 ldev = netdev_lower_get_next(dev, &(iter)); \
3899 ldev = netdev_lower_get_next(dev, &(iter)))
3901 struct net_device *netdev_all_lower_get_next(struct net_device *dev,
3902 struct list_head **iter);
3903 struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev,
3904 struct list_head **iter);
3906 int netdev_walk_all_lower_dev(struct net_device *dev,
3907 int (*fn)(struct net_device *lower_dev,
3910 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
3911 int (*fn)(struct net_device *lower_dev,
3915 void *netdev_adjacent_get_private(struct list_head *adj_list);
3916 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3917 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3918 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3919 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
3920 int netdev_master_upper_dev_link(struct net_device *dev,
3921 struct net_device *upper_dev,
3922 void *upper_priv, void *upper_info);
3923 void netdev_upper_dev_unlink(struct net_device *dev,
3924 struct net_device *upper_dev);
3925 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3926 void *netdev_lower_dev_get_private(struct net_device *dev,
3927 struct net_device *lower_dev);
3928 void netdev_lower_state_changed(struct net_device *lower_dev,
3929 void *lower_state_info);
3931 /* RSS keys are 40 or 52 bytes long */
3932 #define NETDEV_RSS_KEY_LEN 52
3933 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
3934 void netdev_rss_key_fill(void *buffer, size_t len);
3936 int dev_get_nest_level(struct net_device *dev);
3937 int skb_checksum_help(struct sk_buff *skb);
3938 int skb_crc32c_csum_help(struct sk_buff *skb);
3939 int skb_csum_hwoffload_help(struct sk_buff *skb,
3940 const netdev_features_t features);
3942 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
3943 netdev_features_t features, bool tx_path);
3944 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
3945 netdev_features_t features);
3947 struct netdev_bonding_info {
3952 struct netdev_notifier_bonding_info {
3953 struct netdev_notifier_info info; /* must be first */
3954 struct netdev_bonding_info bonding_info;
3957 void netdev_bonding_info_change(struct net_device *dev,
3958 struct netdev_bonding_info *bonding_info);
3961 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
3963 return __skb_gso_segment(skb, features, true);
3965 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3967 static inline bool can_checksum_protocol(netdev_features_t features,
3970 if (protocol == htons(ETH_P_FCOE))
3971 return !!(features & NETIF_F_FCOE_CRC);
3973 /* Assume this is an IP checksum (not SCTP CRC) */
3975 if (features & NETIF_F_HW_CSUM) {
3976 /* Can checksum everything */
3981 case htons(ETH_P_IP):
3982 return !!(features & NETIF_F_IP_CSUM);
3983 case htons(ETH_P_IPV6):
3984 return !!(features & NETIF_F_IPV6_CSUM);
3991 void netdev_rx_csum_fault(struct net_device *dev);
3993 static inline void netdev_rx_csum_fault(struct net_device *dev)
3997 /* rx skb timestamps */
3998 void net_enable_timestamp(void);
3999 void net_disable_timestamp(void);
4001 #ifdef CONFIG_PROC_FS
4002 int __init dev_proc_init(void);
4004 #define dev_proc_init() 0
4007 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4008 struct sk_buff *skb, struct net_device *dev,
4011 skb->xmit_more = more ? 1 : 0;
4012 return ops->ndo_start_xmit(skb, dev);
4015 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4016 struct netdev_queue *txq, bool more)
4018 const struct net_device_ops *ops = dev->netdev_ops;
4021 rc = __netdev_start_xmit(ops, skb, dev, more);
4022 if (rc == NETDEV_TX_OK)
4023 txq_trans_update(txq);
4028 int netdev_class_create_file_ns(struct class_attribute *class_attr,
4030 void netdev_class_remove_file_ns(struct class_attribute *class_attr,
4033 static inline int netdev_class_create_file(struct class_attribute *class_attr)
4035 return netdev_class_create_file_ns(class_attr, NULL);
4038 static inline void netdev_class_remove_file(struct class_attribute *class_attr)
4040 netdev_class_remove_file_ns(class_attr, NULL);
4043 extern struct kobj_ns_type_operations net_ns_type_operations;
4045 const char *netdev_drivername(const struct net_device *dev);
4047 void linkwatch_run_queue(void);
4049 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4050 netdev_features_t f2)
4052 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4053 if (f1 & NETIF_F_HW_CSUM)
4054 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4056 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4062 static inline netdev_features_t netdev_get_wanted_features(
4063 struct net_device *dev)
4065 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4067 netdev_features_t netdev_increment_features(netdev_features_t all,
4068 netdev_features_t one, netdev_features_t mask);
4070 /* Allow TSO being used on stacked device :
4071 * Performing the GSO segmentation before last device
4072 * is a performance improvement.
4074 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4075 netdev_features_t mask)
4077 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4080 int __netdev_update_features(struct net_device *dev);
4081 void netdev_update_features(struct net_device *dev);
4082 void netdev_change_features(struct net_device *dev);
4084 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4085 struct net_device *dev);
4087 netdev_features_t passthru_features_check(struct sk_buff *skb,
4088 struct net_device *dev,
4089 netdev_features_t features);
4090 netdev_features_t netif_skb_features(struct sk_buff *skb);
4092 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4094 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4096 /* check flags correspondence */
4097 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4098 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
4099 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4100 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4101 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4102 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4103 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4104 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4105 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4106 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4107 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4108 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4109 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4110 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4111 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4112 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4113 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4115 return (features & feature) == feature;
4118 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4120 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4121 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4124 static inline bool netif_needs_gso(struct sk_buff *skb,
4125 netdev_features_t features)
4127 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4128 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4129 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4132 static inline void netif_set_gso_max_size(struct net_device *dev,
4135 dev->gso_max_size = size;
4138 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4139 int pulled_hlen, u16 mac_offset,
4142 skb->protocol = protocol;
4143 skb->encapsulation = 1;
4144 skb_push(skb, pulled_hlen);
4145 skb_reset_transport_header(skb);
4146 skb->mac_header = mac_offset;
4147 skb->network_header = skb->mac_header + mac_len;
4148 skb->mac_len = mac_len;
4151 static inline bool netif_is_macsec(const struct net_device *dev)
4153 return dev->priv_flags & IFF_MACSEC;
4156 static inline bool netif_is_macvlan(const struct net_device *dev)
4158 return dev->priv_flags & IFF_MACVLAN;
4161 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4163 return dev->priv_flags & IFF_MACVLAN_PORT;
4166 static inline bool netif_is_ipvlan(const struct net_device *dev)
4168 return dev->priv_flags & IFF_IPVLAN_SLAVE;
4171 static inline bool netif_is_ipvlan_port(const struct net_device *dev)
4173 return dev->priv_flags & IFF_IPVLAN_MASTER;
4176 static inline bool netif_is_bond_master(const struct net_device *dev)
4178 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4181 static inline bool netif_is_bond_slave(const struct net_device *dev)
4183 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4186 static inline bool netif_supports_nofcs(struct net_device *dev)
4188 return dev->priv_flags & IFF_SUPP_NOFCS;
4191 static inline bool netif_is_l3_master(const struct net_device *dev)
4193 return dev->priv_flags & IFF_L3MDEV_MASTER;
4196 static inline bool netif_is_l3_slave(const struct net_device *dev)
4198 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4201 static inline bool netif_is_bridge_master(const struct net_device *dev)
4203 return dev->priv_flags & IFF_EBRIDGE;
4206 static inline bool netif_is_bridge_port(const struct net_device *dev)
4208 return dev->priv_flags & IFF_BRIDGE_PORT;
4211 static inline bool netif_is_ovs_master(const struct net_device *dev)
4213 return dev->priv_flags & IFF_OPENVSWITCH;
4216 static inline bool netif_is_ovs_port(const struct net_device *dev)
4218 return dev->priv_flags & IFF_OVS_DATAPATH;
4221 static inline bool netif_is_team_master(const struct net_device *dev)
4223 return dev->priv_flags & IFF_TEAM;
4226 static inline bool netif_is_team_port(const struct net_device *dev)
4228 return dev->priv_flags & IFF_TEAM_PORT;
4231 static inline bool netif_is_lag_master(const struct net_device *dev)
4233 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4236 static inline bool netif_is_lag_port(const struct net_device *dev)
4238 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4241 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4243 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4246 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4247 static inline void netif_keep_dst(struct net_device *dev)
4249 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4252 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4253 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4255 /* TODO: reserve and use an additional IFF bit, if we get more users */
4256 return dev->priv_flags & IFF_MACSEC;
4259 extern struct pernet_operations __net_initdata loopback_net_ops;
4261 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4263 /* netdev_printk helpers, similar to dev_printk */
4265 static inline const char *netdev_name(const struct net_device *dev)
4267 if (!dev->name[0] || strchr(dev->name, '%'))
4268 return "(unnamed net_device)";
4272 static inline bool netdev_unregistering(const struct net_device *dev)
4274 return dev->reg_state == NETREG_UNREGISTERING;
4277 static inline const char *netdev_reg_state(const struct net_device *dev)
4279 switch (dev->reg_state) {
4280 case NETREG_UNINITIALIZED: return " (uninitialized)";
4281 case NETREG_REGISTERED: return "";
4282 case NETREG_UNREGISTERING: return " (unregistering)";
4283 case NETREG_UNREGISTERED: return " (unregistered)";
4284 case NETREG_RELEASED: return " (released)";
4285 case NETREG_DUMMY: return " (dummy)";
4288 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4289 return " (unknown)";
4293 void netdev_printk(const char *level, const struct net_device *dev,
4294 const char *format, ...);
4296 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4298 void netdev_alert(const struct net_device *dev, const char *format, ...);
4300 void netdev_crit(const struct net_device *dev, const char *format, ...);
4302 void netdev_err(const struct net_device *dev, const char *format, ...);
4304 void netdev_warn(const struct net_device *dev, const char *format, ...);
4306 void netdev_notice(const struct net_device *dev, const char *format, ...);
4308 void netdev_info(const struct net_device *dev, const char *format, ...);
4310 #define MODULE_ALIAS_NETDEV(device) \
4311 MODULE_ALIAS("netdev-" device)
4313 #if defined(CONFIG_DYNAMIC_DEBUG)
4314 #define netdev_dbg(__dev, format, args...) \
4316 dynamic_netdev_dbg(__dev, format, ##args); \
4318 #elif defined(DEBUG)
4319 #define netdev_dbg(__dev, format, args...) \
4320 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4322 #define netdev_dbg(__dev, format, args...) \
4325 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4329 #if defined(VERBOSE_DEBUG)
4330 #define netdev_vdbg netdev_dbg
4333 #define netdev_vdbg(dev, format, args...) \
4336 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4342 * netdev_WARN() acts like dev_printk(), but with the key difference
4343 * of using a WARN/WARN_ON to get the message out, including the
4344 * file/line information and a backtrace.
4346 #define netdev_WARN(dev, format, args...) \
4347 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
4348 netdev_reg_state(dev), ##args)
4350 /* netif printk helpers, similar to netdev_printk */
4352 #define netif_printk(priv, type, level, dev, fmt, args...) \
4354 if (netif_msg_##type(priv)) \
4355 netdev_printk(level, (dev), fmt, ##args); \
4358 #define netif_level(level, priv, type, dev, fmt, args...) \
4360 if (netif_msg_##type(priv)) \
4361 netdev_##level(dev, fmt, ##args); \
4364 #define netif_emerg(priv, type, dev, fmt, args...) \
4365 netif_level(emerg, priv, type, dev, fmt, ##args)
4366 #define netif_alert(priv, type, dev, fmt, args...) \
4367 netif_level(alert, priv, type, dev, fmt, ##args)
4368 #define netif_crit(priv, type, dev, fmt, args...) \
4369 netif_level(crit, priv, type, dev, fmt, ##args)
4370 #define netif_err(priv, type, dev, fmt, args...) \
4371 netif_level(err, priv, type, dev, fmt, ##args)
4372 #define netif_warn(priv, type, dev, fmt, args...) \
4373 netif_level(warn, priv, type, dev, fmt, ##args)
4374 #define netif_notice(priv, type, dev, fmt, args...) \
4375 netif_level(notice, priv, type, dev, fmt, ##args)
4376 #define netif_info(priv, type, dev, fmt, args...) \
4377 netif_level(info, priv, type, dev, fmt, ##args)
4379 #if defined(CONFIG_DYNAMIC_DEBUG)
4380 #define netif_dbg(priv, type, netdev, format, args...) \
4382 if (netif_msg_##type(priv)) \
4383 dynamic_netdev_dbg(netdev, format, ##args); \
4385 #elif defined(DEBUG)
4386 #define netif_dbg(priv, type, dev, format, args...) \
4387 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4389 #define netif_dbg(priv, type, dev, format, args...) \
4392 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4397 /* if @cond then downgrade to debug, else print at @level */
4398 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4401 netif_dbg(priv, type, netdev, fmt, ##args); \
4403 netif_ ## level(priv, type, netdev, fmt, ##args); \
4406 #if defined(VERBOSE_DEBUG)
4407 #define netif_vdbg netif_dbg
4409 #define netif_vdbg(priv, type, dev, format, args...) \
4412 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4418 * The list of packet types we will receive (as opposed to discard)
4419 * and the routines to invoke.
4421 * Why 16. Because with 16 the only overlap we get on a hash of the
4422 * low nibble of the protocol value is RARP/SNAP/X.25.
4424 * NOTE: That is no longer true with the addition of VLAN tags. Not
4425 * sure which should go first, but I bet it won't make much
4426 * difference if we are running VLANs. The good news is that
4427 * this protocol won't be in the list unless compiled in, so
4428 * the average user (w/out VLANs) will not be adversely affected.
4444 #define PTYPE_HASH_SIZE (16)
4445 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4447 #endif /* _LINUX_NETDEVICE_H */