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/pm_qos.h>
29 #include <linux/timer.h>
30 #include <linux/bug.h>
31 #include <linux/delay.h>
32 #include <linux/atomic.h>
33 #include <linux/prefetch.h>
34 #include <asm/cache.h>
35 #include <asm/byteorder.h>
37 #include <linux/percpu.h>
38 #include <linux/rculist.h>
39 #include <linux/dmaengine.h>
40 #include <linux/workqueue.h>
41 #include <linux/dynamic_queue_limits.h>
43 #include <linux/ethtool.h>
44 #include <net/net_namespace.h>
47 #include <net/dcbnl.h>
49 #include <net/netprio_cgroup.h>
51 #include <linux/netdev_features.h>
52 #include <linux/neighbour.h>
53 #include <uapi/linux/netdevice.h>
60 /* 802.15.4 specific */
63 void netdev_set_default_ethtool_ops(struct net_device *dev,
64 const struct ethtool_ops *ops);
66 /* Backlog congestion levels */
67 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
68 #define NET_RX_DROP 1 /* packet dropped */
71 * Transmit return codes: transmit return codes originate from three different
74 * - qdisc return codes
75 * - driver transmit return codes
78 * Drivers are allowed to return any one of those in their hard_start_xmit()
79 * function. Real network devices commonly used with qdiscs should only return
80 * the driver transmit return codes though - when qdiscs are used, the actual
81 * transmission happens asynchronously, so the value is not propagated to
82 * higher layers. Virtual network devices transmit synchronously, in this case
83 * the driver transmit return codes are consumed by dev_queue_xmit(), all
84 * others are propagated to higher layers.
87 /* qdisc ->enqueue() return codes. */
88 #define NET_XMIT_SUCCESS 0x00
89 #define NET_XMIT_DROP 0x01 /* skb dropped */
90 #define NET_XMIT_CN 0x02 /* congestion notification */
91 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
92 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
94 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
95 * indicates that the device will soon be dropping packets, or already drops
96 * some packets of the same priority; prompting us to send less aggressively. */
97 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
98 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
100 /* Driver transmit return codes */
101 #define NETDEV_TX_MASK 0xf0
104 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
105 NETDEV_TX_OK = 0x00, /* driver took care of packet */
106 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
107 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
109 typedef enum netdev_tx netdev_tx_t;
112 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
113 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
115 static inline bool dev_xmit_complete(int rc)
118 * Positive cases with an skb consumed by a driver:
119 * - successful transmission (rc == NETDEV_TX_OK)
120 * - error while transmitting (rc < 0)
121 * - error while queueing to a different device (rc & NET_XMIT_MASK)
123 if (likely(rc < NET_XMIT_MASK))
130 * Compute the worst case header length according to the protocols
134 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
135 # if defined(CONFIG_MAC80211_MESH)
136 # define LL_MAX_HEADER 128
138 # define LL_MAX_HEADER 96
141 # define LL_MAX_HEADER 32
144 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
145 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
146 #define MAX_HEADER LL_MAX_HEADER
148 #define MAX_HEADER (LL_MAX_HEADER + 48)
152 * Old network device statistics. Fields are native words
153 * (unsigned long) so they can be read and written atomically.
156 struct net_device_stats {
157 unsigned long rx_packets;
158 unsigned long tx_packets;
159 unsigned long rx_bytes;
160 unsigned long tx_bytes;
161 unsigned long rx_errors;
162 unsigned long tx_errors;
163 unsigned long rx_dropped;
164 unsigned long tx_dropped;
165 unsigned long multicast;
166 unsigned long collisions;
167 unsigned long rx_length_errors;
168 unsigned long rx_over_errors;
169 unsigned long rx_crc_errors;
170 unsigned long rx_frame_errors;
171 unsigned long rx_fifo_errors;
172 unsigned long rx_missed_errors;
173 unsigned long tx_aborted_errors;
174 unsigned long tx_carrier_errors;
175 unsigned long tx_fifo_errors;
176 unsigned long tx_heartbeat_errors;
177 unsigned long tx_window_errors;
178 unsigned long rx_compressed;
179 unsigned long tx_compressed;
183 #include <linux/cache.h>
184 #include <linux/skbuff.h>
187 #include <linux/static_key.h>
188 extern struct static_key rps_needed;
195 struct netdev_hw_addr {
196 struct list_head list;
197 unsigned char addr[MAX_ADDR_LEN];
199 #define NETDEV_HW_ADDR_T_LAN 1
200 #define NETDEV_HW_ADDR_T_SAN 2
201 #define NETDEV_HW_ADDR_T_SLAVE 3
202 #define NETDEV_HW_ADDR_T_UNICAST 4
203 #define NETDEV_HW_ADDR_T_MULTICAST 5
208 struct rcu_head rcu_head;
211 struct netdev_hw_addr_list {
212 struct list_head list;
216 #define netdev_hw_addr_list_count(l) ((l)->count)
217 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
218 #define netdev_hw_addr_list_for_each(ha, l) \
219 list_for_each_entry(ha, &(l)->list, list)
221 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
222 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
223 #define netdev_for_each_uc_addr(ha, dev) \
224 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
226 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
227 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
228 #define netdev_for_each_mc_addr(ha, dev) \
229 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
236 /* cached hardware header; allow for machine alignment needs. */
237 #define HH_DATA_MOD 16
238 #define HH_DATA_OFF(__len) \
239 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
240 #define HH_DATA_ALIGN(__len) \
241 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
242 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
245 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
247 * dev->hard_header_len ? (dev->hard_header_len +
248 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
250 * We could use other alignment values, but we must maintain the
251 * relationship HH alignment <= LL alignment.
253 #define LL_RESERVED_SPACE(dev) \
254 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
255 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
256 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 int (*create) (struct sk_buff *skb, struct net_device *dev,
260 unsigned short type, const void *daddr,
261 const void *saddr, unsigned int len);
262 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
263 int (*rebuild)(struct sk_buff *skb);
264 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
265 void (*cache_update)(struct hh_cache *hh,
266 const struct net_device *dev,
267 const unsigned char *haddr);
270 /* These flag bits are private to the generic network queueing
271 * layer, they may not be explicitly referenced by any other
275 enum netdev_state_t {
277 __LINK_STATE_PRESENT,
278 __LINK_STATE_NOCARRIER,
279 __LINK_STATE_LINKWATCH_PENDING,
280 __LINK_STATE_DORMANT,
285 * This structure holds at boot time configured netdevice settings. They
286 * are then used in the device probing.
288 struct netdev_boot_setup {
292 #define NETDEV_BOOT_SETUP_MAX 8
294 int __init netdev_boot_setup(char *str);
297 * Structure for NAPI scheduling similar to tasklet but with weighting
300 /* The poll_list must only be managed by the entity which
301 * changes the state of the NAPI_STATE_SCHED bit. This means
302 * whoever atomically sets that bit can add this napi_struct
303 * to the per-cpu poll_list, and whoever clears that bit
304 * can remove from the list right before clearing the bit.
306 struct list_head poll_list;
310 unsigned int gro_count;
311 int (*poll)(struct napi_struct *, int);
312 #ifdef CONFIG_NETPOLL
313 spinlock_t poll_lock;
316 struct net_device *dev;
317 struct sk_buff *gro_list;
319 struct list_head dev_list;
320 struct hlist_node napi_hash_node;
321 unsigned int napi_id;
325 NAPI_STATE_SCHED, /* Poll is scheduled */
326 NAPI_STATE_DISABLE, /* Disable pending */
327 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
328 NAPI_STATE_HASHED, /* In NAPI hash */
338 typedef enum gro_result gro_result_t;
341 * enum rx_handler_result - Possible return values for rx_handlers.
342 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
344 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
345 * case skb->dev was changed by rx_handler.
346 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
347 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
349 * rx_handlers are functions called from inside __netif_receive_skb(), to do
350 * special processing of the skb, prior to delivery to protocol handlers.
352 * Currently, a net_device can only have a single rx_handler registered. Trying
353 * to register a second rx_handler will return -EBUSY.
355 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
356 * To unregister a rx_handler on a net_device, use
357 * netdev_rx_handler_unregister().
359 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
362 * If the rx_handler consumed to skb in some way, it should return
363 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
364 * the skb to be delivered in some other ways.
366 * If the rx_handler changed skb->dev, to divert the skb to another
367 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
368 * new device will be called if it exists.
370 * If the rx_handler consider the skb should be ignored, it should return
371 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
372 * are registered on exact device (ptype->dev == skb->dev).
374 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
375 * delivered, it should return RX_HANDLER_PASS.
377 * A device without a registered rx_handler will behave as if rx_handler
378 * returned RX_HANDLER_PASS.
381 enum rx_handler_result {
387 typedef enum rx_handler_result rx_handler_result_t;
388 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
390 void __napi_schedule(struct napi_struct *n);
392 static inline bool napi_disable_pending(struct napi_struct *n)
394 return test_bit(NAPI_STATE_DISABLE, &n->state);
398 * napi_schedule_prep - check if napi can be scheduled
401 * Test if NAPI routine is already running, and if not mark
402 * it as running. This is used as a condition variable
403 * insure only one NAPI poll instance runs. We also make
404 * sure there is no pending NAPI disable.
406 static inline bool napi_schedule_prep(struct napi_struct *n)
408 return !napi_disable_pending(n) &&
409 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
413 * napi_schedule - schedule NAPI poll
416 * Schedule NAPI poll routine to be called if it is not already
419 static inline void napi_schedule(struct napi_struct *n)
421 if (napi_schedule_prep(n))
425 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
426 static inline bool napi_reschedule(struct napi_struct *napi)
428 if (napi_schedule_prep(napi)) {
429 __napi_schedule(napi);
436 * napi_complete - NAPI processing complete
439 * Mark NAPI processing as complete.
441 void __napi_complete(struct napi_struct *n);
442 void napi_complete(struct napi_struct *n);
445 * napi_by_id - lookup a NAPI by napi_id
446 * @napi_id: hashed napi_id
448 * lookup @napi_id in napi_hash table
449 * must be called under rcu_read_lock()
451 struct napi_struct *napi_by_id(unsigned int napi_id);
454 * napi_hash_add - add a NAPI to global hashtable
455 * @napi: napi context
457 * generate a new napi_id and store a @napi under it in napi_hash
459 void napi_hash_add(struct napi_struct *napi);
462 * napi_hash_del - remove a NAPI from global table
463 * @napi: napi context
465 * Warning: caller must observe rcu grace period
466 * before freeing memory containing @napi
468 void napi_hash_del(struct napi_struct *napi);
471 * napi_disable - prevent NAPI from scheduling
474 * Stop NAPI from being scheduled on this context.
475 * Waits till any outstanding processing completes.
477 static inline void napi_disable(struct napi_struct *n)
480 set_bit(NAPI_STATE_DISABLE, &n->state);
481 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
483 clear_bit(NAPI_STATE_DISABLE, &n->state);
487 * napi_enable - enable NAPI scheduling
490 * Resume NAPI from being scheduled on this context.
491 * Must be paired with napi_disable.
493 static inline void napi_enable(struct napi_struct *n)
495 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
496 smp_mb__before_atomic();
497 clear_bit(NAPI_STATE_SCHED, &n->state);
502 * napi_synchronize - wait until NAPI is not running
505 * Wait until NAPI is done being scheduled on this context.
506 * Waits till any outstanding processing completes but
507 * does not disable future activations.
509 static inline void napi_synchronize(const struct napi_struct *n)
511 while (test_bit(NAPI_STATE_SCHED, &n->state))
515 # define napi_synchronize(n) barrier()
518 enum netdev_queue_state_t {
519 __QUEUE_STATE_DRV_XOFF,
520 __QUEUE_STATE_STACK_XOFF,
521 __QUEUE_STATE_FROZEN,
524 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
525 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
526 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
528 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
529 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
531 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
535 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
536 * netif_tx_* functions below are used to manipulate this flag. The
537 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
538 * queue independently. The netif_xmit_*stopped functions below are called
539 * to check if the queue has been stopped by the driver or stack (either
540 * of the XOFF bits are set in the state). Drivers should not need to call
541 * netif_xmit*stopped functions, they should only be using netif_tx_*.
544 struct netdev_queue {
548 struct net_device *dev;
549 struct Qdisc __rcu *qdisc;
550 struct Qdisc *qdisc_sleeping;
554 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
560 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
563 * please use this field instead of dev->trans_start
565 unsigned long trans_start;
568 * Number of TX timeouts for this queue
569 * (/sys/class/net/DEV/Q/trans_timeout)
571 unsigned long trans_timeout;
578 } ____cacheline_aligned_in_smp;
580 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
582 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
589 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
591 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
598 * This structure holds an RPS map which can be of variable length. The
599 * map is an array of CPUs.
606 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
609 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
610 * tail pointer for that CPU's input queue at the time of last enqueue, and
611 * a hardware filter index.
613 struct rps_dev_flow {
616 unsigned int last_qtail;
618 #define RPS_NO_FILTER 0xffff
621 * The rps_dev_flow_table structure contains a table of flow mappings.
623 struct rps_dev_flow_table {
626 struct rps_dev_flow flows[0];
628 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
629 ((_num) * sizeof(struct rps_dev_flow)))
632 * The rps_sock_flow_table contains mappings of flows to the last CPU
633 * on which they were processed by the application (set in recvmsg).
635 struct rps_sock_flow_table {
639 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
640 ((_num) * sizeof(u16)))
642 #define RPS_NO_CPU 0xffff
644 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
648 unsigned int cpu, index = hash & table->mask;
650 /* We only give a hint, preemption can change cpu under us */
651 cpu = raw_smp_processor_id();
653 if (table->ents[index] != cpu)
654 table->ents[index] = cpu;
658 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
662 table->ents[hash & table->mask] = RPS_NO_CPU;
665 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
667 #ifdef CONFIG_RFS_ACCEL
668 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
671 #endif /* CONFIG_RPS */
673 /* This structure contains an instance of an RX queue. */
674 struct netdev_rx_queue {
676 struct rps_map __rcu *rps_map;
677 struct rps_dev_flow_table __rcu *rps_flow_table;
680 struct net_device *dev;
681 } ____cacheline_aligned_in_smp;
684 * RX queue sysfs structures and functions.
686 struct rx_queue_attribute {
687 struct attribute attr;
688 ssize_t (*show)(struct netdev_rx_queue *queue,
689 struct rx_queue_attribute *attr, char *buf);
690 ssize_t (*store)(struct netdev_rx_queue *queue,
691 struct rx_queue_attribute *attr, const char *buf, size_t len);
696 * This structure holds an XPS map which can be of variable length. The
697 * map is an array of queues.
701 unsigned int alloc_len;
705 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
706 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
710 * This structure holds all XPS maps for device. Maps are indexed by CPU.
712 struct xps_dev_maps {
714 struct xps_map __rcu *cpu_map[0];
716 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
717 (nr_cpu_ids * sizeof(struct xps_map *)))
718 #endif /* CONFIG_XPS */
720 #define TC_MAX_QUEUE 16
721 #define TC_BITMASK 15
722 /* HW offloaded queuing disciplines txq count and offset maps */
723 struct netdev_tc_txq {
728 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
730 * This structure is to hold information about the device
731 * configured to run FCoE protocol stack.
733 struct netdev_fcoe_hbainfo {
734 char manufacturer[64];
735 char serial_number[64];
736 char hardware_version[64];
737 char driver_version[64];
738 char optionrom_version[64];
739 char firmware_version[64];
741 char model_description[256];
745 #define MAX_PHYS_PORT_ID_LEN 32
747 /* This structure holds a unique identifier to identify the
748 * physical port used by a netdevice.
750 struct netdev_phys_port_id {
751 unsigned char id[MAX_PHYS_PORT_ID_LEN];
752 unsigned char id_len;
755 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
756 struct sk_buff *skb);
759 * This structure defines the management hooks for network devices.
760 * The following hooks can be defined; unless noted otherwise, they are
761 * optional and can be filled with a null pointer.
763 * int (*ndo_init)(struct net_device *dev);
764 * This function is called once when network device is registered.
765 * The network device can use this to any late stage initializaton
766 * or semantic validattion. It can fail with an error code which will
767 * be propogated back to register_netdev
769 * void (*ndo_uninit)(struct net_device *dev);
770 * This function is called when device is unregistered or when registration
771 * fails. It is not called if init fails.
773 * int (*ndo_open)(struct net_device *dev);
774 * This function is called when network device transistions to the up
777 * int (*ndo_stop)(struct net_device *dev);
778 * This function is called when network device transistions to the down
781 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
782 * struct net_device *dev);
783 * Called when a packet needs to be transmitted.
784 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
785 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
786 * Required can not be NULL.
788 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
789 * void *accel_priv, select_queue_fallback_t fallback);
790 * Called to decide which queue to when device supports multiple
793 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
794 * This function is called to allow device receiver to make
795 * changes to configuration when multicast or promiscious is enabled.
797 * void (*ndo_set_rx_mode)(struct net_device *dev);
798 * This function is called device changes address list filtering.
799 * If driver handles unicast address filtering, it should set
800 * IFF_UNICAST_FLT to its priv_flags.
802 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
803 * This function is called when the Media Access Control address
804 * needs to be changed. If this interface is not defined, the
805 * mac address can not be changed.
807 * int (*ndo_validate_addr)(struct net_device *dev);
808 * Test if Media Access Control address is valid for the device.
810 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
811 * Called when a user request an ioctl which can't be handled by
812 * the generic interface code. If not defined ioctl's return
813 * not supported error code.
815 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
816 * Used to set network devices bus interface parameters. This interface
817 * is retained for legacy reason, new devices should use the bus
818 * interface (PCI) for low level management.
820 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
821 * Called when a user wants to change the Maximum Transfer Unit
822 * of a device. If not defined, any request to change MTU will
823 * will return an error.
825 * void (*ndo_tx_timeout)(struct net_device *dev);
826 * Callback uses when the transmitter has not made any progress
827 * for dev->watchdog ticks.
829 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
830 * struct rtnl_link_stats64 *storage);
831 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
832 * Called when a user wants to get the network device usage
833 * statistics. Drivers must do one of the following:
834 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
835 * rtnl_link_stats64 structure passed by the caller.
836 * 2. Define @ndo_get_stats to update a net_device_stats structure
837 * (which should normally be dev->stats) and return a pointer to
838 * it. The structure may be changed asynchronously only if each
839 * field is written atomically.
840 * 3. Update dev->stats asynchronously and atomically, and define
843 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
844 * If device support VLAN filtering this function is called when a
845 * VLAN id is registered.
847 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
848 * If device support VLAN filtering this function is called when a
849 * VLAN id is unregistered.
851 * void (*ndo_poll_controller)(struct net_device *dev);
853 * SR-IOV management functions.
854 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
855 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
856 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
858 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
859 * int (*ndo_get_vf_config)(struct net_device *dev,
860 * int vf, struct ifla_vf_info *ivf);
861 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
862 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
863 * struct nlattr *port[]);
864 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
865 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
866 * Called to setup 'tc' number of traffic classes in the net device. This
867 * is always called from the stack with the rtnl lock held and netif tx
868 * queues stopped. This allows the netdevice to perform queue management
871 * Fiber Channel over Ethernet (FCoE) offload functions.
872 * int (*ndo_fcoe_enable)(struct net_device *dev);
873 * Called when the FCoE protocol stack wants to start using LLD for FCoE
874 * so the underlying device can perform whatever needed configuration or
875 * initialization to support acceleration of FCoE traffic.
877 * int (*ndo_fcoe_disable)(struct net_device *dev);
878 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
879 * so the underlying device can perform whatever needed clean-ups to
880 * stop supporting acceleration of FCoE traffic.
882 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
883 * struct scatterlist *sgl, unsigned int sgc);
884 * Called when the FCoE Initiator wants to initialize an I/O that
885 * is a possible candidate for Direct Data Placement (DDP). The LLD can
886 * perform necessary setup and returns 1 to indicate the device is set up
887 * successfully to perform DDP on this I/O, otherwise this returns 0.
889 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
890 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
891 * indicated by the FC exchange id 'xid', so the underlying device can
892 * clean up and reuse resources for later DDP requests.
894 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
895 * struct scatterlist *sgl, unsigned int sgc);
896 * Called when the FCoE Target wants to initialize an I/O that
897 * is a possible candidate for Direct Data Placement (DDP). The LLD can
898 * perform necessary setup and returns 1 to indicate the device is set up
899 * successfully to perform DDP on this I/O, otherwise this returns 0.
901 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
902 * struct netdev_fcoe_hbainfo *hbainfo);
903 * Called when the FCoE Protocol stack wants information on the underlying
904 * device. This information is utilized by the FCoE protocol stack to
905 * register attributes with Fiber Channel management service as per the
906 * FC-GS Fabric Device Management Information(FDMI) specification.
908 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
909 * Called when the underlying device wants to override default World Wide
910 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
911 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
912 * protocol stack to use.
915 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
916 * u16 rxq_index, u32 flow_id);
917 * Set hardware filter for RFS. rxq_index is the target queue index;
918 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
919 * Return the filter ID on success, or a negative error code.
921 * Slave management functions (for bridge, bonding, etc).
922 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
923 * Called to make another netdev an underling.
925 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
926 * Called to release previously enslaved netdev.
928 * Feature/offload setting functions.
929 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
930 * netdev_features_t features);
931 * Adjusts the requested feature flags according to device-specific
932 * constraints, and returns the resulting flags. Must not modify
935 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
936 * Called to update device configuration to new features. Passed
937 * feature set might be less than what was returned by ndo_fix_features()).
938 * Must return >0 or -errno if it changed dev->features itself.
940 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
941 * struct net_device *dev,
942 * const unsigned char *addr, u16 flags)
943 * Adds an FDB entry to dev for addr.
944 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
945 * struct net_device *dev,
946 * const unsigned char *addr)
947 * Deletes the FDB entry from dev coresponding to addr.
948 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
949 * struct net_device *dev, struct net_device *filter_dev,
951 * Used to add FDB entries to dump requests. Implementers should add
952 * entries to skb and update idx with the number of entries.
954 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
955 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
956 * struct net_device *dev, u32 filter_mask)
958 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
959 * Called to change device carrier. Soft-devices (like dummy, team, etc)
960 * which do not represent real hardware may define this to allow their
961 * userspace components to manage their virtual carrier state. Devices
962 * that determine carrier state from physical hardware properties (eg
963 * network cables) or protocol-dependent mechanisms (eg
964 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
966 * int (*ndo_get_phys_port_id)(struct net_device *dev,
967 * struct netdev_phys_port_id *ppid);
968 * Called to get ID of physical port of this device. If driver does
969 * not implement this, it is assumed that the hw is not able to have
970 * multiple net devices on single physical port.
972 * void (*ndo_add_vxlan_port)(struct net_device *dev,
973 * sa_family_t sa_family, __be16 port);
974 * Called by vxlan to notiy a driver about the UDP port and socket
975 * address family that vxlan is listnening to. It is called only when
976 * a new port starts listening. The operation is protected by the
977 * vxlan_net->sock_lock.
979 * void (*ndo_del_vxlan_port)(struct net_device *dev,
980 * sa_family_t sa_family, __be16 port);
981 * Called by vxlan to notify the driver about a UDP port and socket
982 * address family that vxlan is not listening to anymore. The operation
983 * is protected by the vxlan_net->sock_lock.
985 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
986 * struct net_device *dev)
987 * Called by upper layer devices to accelerate switching or other
988 * station functionality into hardware. 'pdev is the lowerdev
989 * to use for the offload and 'dev' is the net device that will
990 * back the offload. Returns a pointer to the private structure
991 * the upper layer will maintain.
992 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
993 * Called by upper layer device to delete the station created
994 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
995 * the station and priv is the structure returned by the add
997 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
998 * struct net_device *dev,
1000 * Callback to use for xmit over the accelerated station. This
1001 * is used in place of ndo_start_xmit on accelerated net
1003 * bool (*ndo_gso_check) (struct sk_buff *skb,
1004 * struct net_device *dev);
1005 * Called by core transmit path to determine if device is capable of
1006 * performing GSO on a packet. The device returns true if it is
1007 * able to GSO the packet, false otherwise. If the return value is
1008 * false the stack will do software GSO.
1010 struct net_device_ops {
1011 int (*ndo_init)(struct net_device *dev);
1012 void (*ndo_uninit)(struct net_device *dev);
1013 int (*ndo_open)(struct net_device *dev);
1014 int (*ndo_stop)(struct net_device *dev);
1015 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
1016 struct net_device *dev);
1017 u16 (*ndo_select_queue)(struct net_device *dev,
1018 struct sk_buff *skb,
1020 select_queue_fallback_t fallback);
1021 void (*ndo_change_rx_flags)(struct net_device *dev,
1023 void (*ndo_set_rx_mode)(struct net_device *dev);
1024 int (*ndo_set_mac_address)(struct net_device *dev,
1026 int (*ndo_validate_addr)(struct net_device *dev);
1027 int (*ndo_do_ioctl)(struct net_device *dev,
1028 struct ifreq *ifr, int cmd);
1029 int (*ndo_set_config)(struct net_device *dev,
1031 int (*ndo_change_mtu)(struct net_device *dev,
1033 int (*ndo_neigh_setup)(struct net_device *dev,
1034 struct neigh_parms *);
1035 void (*ndo_tx_timeout) (struct net_device *dev);
1037 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
1038 struct rtnl_link_stats64 *storage);
1039 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1041 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1042 __be16 proto, u16 vid);
1043 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1044 __be16 proto, u16 vid);
1045 #ifdef CONFIG_NET_POLL_CONTROLLER
1046 void (*ndo_poll_controller)(struct net_device *dev);
1047 int (*ndo_netpoll_setup)(struct net_device *dev,
1048 struct netpoll_info *info);
1049 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1051 #ifdef CONFIG_NET_RX_BUSY_POLL
1052 int (*ndo_busy_poll)(struct napi_struct *dev);
1054 int (*ndo_set_vf_mac)(struct net_device *dev,
1055 int queue, u8 *mac);
1056 int (*ndo_set_vf_vlan)(struct net_device *dev,
1057 int queue, u16 vlan, u8 qos);
1058 int (*ndo_set_vf_rate)(struct net_device *dev,
1059 int vf, int min_tx_rate,
1061 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1062 int vf, bool setting);
1063 int (*ndo_get_vf_config)(struct net_device *dev,
1065 struct ifla_vf_info *ivf);
1066 int (*ndo_set_vf_link_state)(struct net_device *dev,
1067 int vf, int link_state);
1068 int (*ndo_set_vf_port)(struct net_device *dev,
1070 struct nlattr *port[]);
1071 int (*ndo_get_vf_port)(struct net_device *dev,
1072 int vf, struct sk_buff *skb);
1073 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
1074 #if IS_ENABLED(CONFIG_FCOE)
1075 int (*ndo_fcoe_enable)(struct net_device *dev);
1076 int (*ndo_fcoe_disable)(struct net_device *dev);
1077 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1079 struct scatterlist *sgl,
1081 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1083 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1085 struct scatterlist *sgl,
1087 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1088 struct netdev_fcoe_hbainfo *hbainfo);
1091 #if IS_ENABLED(CONFIG_LIBFCOE)
1092 #define NETDEV_FCOE_WWNN 0
1093 #define NETDEV_FCOE_WWPN 1
1094 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1095 u64 *wwn, int type);
1098 #ifdef CONFIG_RFS_ACCEL
1099 int (*ndo_rx_flow_steer)(struct net_device *dev,
1100 const struct sk_buff *skb,
1104 int (*ndo_add_slave)(struct net_device *dev,
1105 struct net_device *slave_dev);
1106 int (*ndo_del_slave)(struct net_device *dev,
1107 struct net_device *slave_dev);
1108 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1109 netdev_features_t features);
1110 int (*ndo_set_features)(struct net_device *dev,
1111 netdev_features_t features);
1112 int (*ndo_neigh_construct)(struct neighbour *n);
1113 void (*ndo_neigh_destroy)(struct neighbour *n);
1115 int (*ndo_fdb_add)(struct ndmsg *ndm,
1116 struct nlattr *tb[],
1117 struct net_device *dev,
1118 const unsigned char *addr,
1120 int (*ndo_fdb_del)(struct ndmsg *ndm,
1121 struct nlattr *tb[],
1122 struct net_device *dev,
1123 const unsigned char *addr);
1124 int (*ndo_fdb_dump)(struct sk_buff *skb,
1125 struct netlink_callback *cb,
1126 struct net_device *dev,
1127 struct net_device *filter_dev,
1130 int (*ndo_bridge_setlink)(struct net_device *dev,
1131 struct nlmsghdr *nlh);
1132 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1134 struct net_device *dev,
1136 int (*ndo_bridge_dellink)(struct net_device *dev,
1137 struct nlmsghdr *nlh);
1138 int (*ndo_change_carrier)(struct net_device *dev,
1140 int (*ndo_get_phys_port_id)(struct net_device *dev,
1141 struct netdev_phys_port_id *ppid);
1142 void (*ndo_add_vxlan_port)(struct net_device *dev,
1143 sa_family_t sa_family,
1145 void (*ndo_del_vxlan_port)(struct net_device *dev,
1146 sa_family_t sa_family,
1149 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1150 struct net_device *dev);
1151 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1154 netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb,
1155 struct net_device *dev,
1157 int (*ndo_get_lock_subclass)(struct net_device *dev);
1158 bool (*ndo_gso_check) (struct sk_buff *skb,
1159 struct net_device *dev);
1163 * enum net_device_priv_flags - &struct net_device priv_flags
1165 * These are the &struct net_device, they are only set internally
1166 * by drivers and used in the kernel. These flags are invisible to
1167 * userspace, this means that the order of these flags can change
1168 * during any kernel release.
1170 * You should have a pretty good reason to be extending these flags.
1172 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1173 * @IFF_EBRIDGE: Ethernet bridging device
1174 * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active
1175 * @IFF_MASTER_8023AD: bonding master, 802.3ad
1176 * @IFF_MASTER_ALB: bonding master, balance-alb
1177 * @IFF_BONDING: bonding master or slave
1178 * @IFF_SLAVE_NEEDARP: need ARPs for validation
1179 * @IFF_ISATAP: ISATAP interface (RFC4214)
1180 * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
1181 * @IFF_WAN_HDLC: WAN HDLC device
1182 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1184 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1185 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1186 * @IFF_MACVLAN_PORT: device used as macvlan port
1187 * @IFF_BRIDGE_PORT: device used as bridge port
1188 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1189 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1190 * @IFF_UNICAST_FLT: Supports unicast filtering
1191 * @IFF_TEAM_PORT: device used as team port
1192 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1193 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1194 * change when it's running
1195 * @IFF_MACVLAN: Macvlan device
1197 enum netdev_priv_flags {
1198 IFF_802_1Q_VLAN = 1<<0,
1200 IFF_SLAVE_INACTIVE = 1<<2,
1201 IFF_MASTER_8023AD = 1<<3,
1202 IFF_MASTER_ALB = 1<<4,
1204 IFF_SLAVE_NEEDARP = 1<<6,
1206 IFF_MASTER_ARPMON = 1<<8,
1207 IFF_WAN_HDLC = 1<<9,
1208 IFF_XMIT_DST_RELEASE = 1<<10,
1209 IFF_DONT_BRIDGE = 1<<11,
1210 IFF_DISABLE_NETPOLL = 1<<12,
1211 IFF_MACVLAN_PORT = 1<<13,
1212 IFF_BRIDGE_PORT = 1<<14,
1213 IFF_OVS_DATAPATH = 1<<15,
1214 IFF_TX_SKB_SHARING = 1<<16,
1215 IFF_UNICAST_FLT = 1<<17,
1216 IFF_TEAM_PORT = 1<<18,
1217 IFF_SUPP_NOFCS = 1<<19,
1218 IFF_LIVE_ADDR_CHANGE = 1<<20,
1219 IFF_MACVLAN = 1<<21,
1220 IFF_XMIT_DST_RELEASE_PERM = 1<<22,
1223 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1224 #define IFF_EBRIDGE IFF_EBRIDGE
1225 #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE
1226 #define IFF_MASTER_8023AD IFF_MASTER_8023AD
1227 #define IFF_MASTER_ALB IFF_MASTER_ALB
1228 #define IFF_BONDING IFF_BONDING
1229 #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP
1230 #define IFF_ISATAP IFF_ISATAP
1231 #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON
1232 #define IFF_WAN_HDLC IFF_WAN_HDLC
1233 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1234 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1235 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1236 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1237 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1238 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1239 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1240 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1241 #define IFF_TEAM_PORT IFF_TEAM_PORT
1242 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1243 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1244 #define IFF_MACVLAN IFF_MACVLAN
1245 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1248 * struct net_device - The DEVICE structure.
1249 * Actually, this whole structure is a big mistake. It mixes I/O
1250 * data with strictly "high-level" data, and it has to know about
1251 * almost every data structure used in the INET module.
1253 * @name: This is the first field of the "visible" part of this structure
1254 * (i.e. as seen by users in the "Space.c" file). It is the name
1257 * @name_hlist: Device name hash chain, please keep it close to name[]
1258 * @ifalias: SNMP alias
1259 * @mem_end: Shared memory end
1260 * @mem_start: Shared memory start
1261 * @base_addr: Device I/O address
1262 * @irq: Device IRQ number
1264 * @state: Generic network queuing layer state, see netdev_state_t
1265 * @dev_list: The global list of network devices
1266 * @napi_list: List entry, that is used for polling napi devices
1267 * @unreg_list: List entry, that is used, when we are unregistering the
1268 * device, see the function unregister_netdev
1269 * @close_list: List entry, that is used, when we are closing the device
1271 * @adj_list: Directly linked devices, like slaves for bonding
1272 * @all_adj_list: All linked devices, *including* neighbours
1273 * @features: Currently active device features
1274 * @hw_features: User-changeable features
1276 * @wanted_features: User-requested features
1277 * @vlan_features: Mask of features inheritable by VLAN devices
1279 * @hw_enc_features: Mask of features inherited by encapsulating devices
1280 * This field indicates what encapsulation
1281 * offloads the hardware is capable of doing,
1282 * and drivers will need to set them appropriately.
1284 * @mpls_features: Mask of features inheritable by MPLS
1286 * @ifindex: interface index
1287 * @iflink: unique device identifier
1289 * @stats: Statistics struct, which was left as a legacy, use
1290 * rtnl_link_stats64 instead
1292 * @rx_dropped: Dropped packets by core network,
1293 * do not use this in drivers
1294 * @tx_dropped: Dropped packets by core network,
1295 * do not use this in drivers
1297 * @carrier_changes: Stats to monitor carrier on<->off transitions
1299 * @wireless_handlers: List of functions to handle Wireless Extensions,
1301 * see <net/iw_handler.h> for details.
1302 * @wireless_data: Instance data managed by the core of wireless extensions
1304 * @netdev_ops: Includes several pointers to callbacks,
1305 * if one wants to override the ndo_*() functions
1306 * @ethtool_ops: Management operations
1307 * @fwd_ops: Management operations
1308 * @header_ops: Includes callbacks for creating,parsing,rebuilding,etc
1309 * of Layer 2 headers.
1311 * @flags: Interface flags (a la BSD)
1312 * @priv_flags: Like 'flags' but invisible to userspace,
1313 * see if.h for the definitions
1314 * @gflags: Global flags ( kept as legacy )
1315 * @padded: How much padding added by alloc_netdev()
1316 * @operstate: RFC2863 operstate
1317 * @link_mode: Mapping policy to operstate
1318 * @if_port: Selectable AUI, TP, ...
1320 * @mtu: Interface MTU value
1321 * @type: Interface hardware type
1322 * @hard_header_len: Hardware header length
1324 * @needed_headroom: Extra headroom the hardware may need, but not in all
1325 * cases can this be guaranteed
1326 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1327 * cases can this be guaranteed. Some cases also use
1328 * LL_MAX_HEADER instead to allocate the skb
1330 * interface address info:
1332 * @perm_addr: Permanent hw address
1333 * @addr_assign_type: Hw address assignment type
1334 * @addr_len: Hardware address length
1335 * @neigh_priv_len; Used in neigh_alloc(),
1336 * initialized only in atm/clip.c
1337 * @dev_id: Used to differentiate devices that share
1338 * the same link layer address
1339 * @dev_port: Used to differentiate devices that share
1341 * @addr_list_lock: XXX: need comments on this one
1342 * @uc: unicast mac addresses
1343 * @mc: multicast mac addresses
1344 * @dev_addrs: list of device hw addresses
1345 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1346 * @uc_promisc: Counter, that indicates, that promiscuous mode
1347 * has been enabled due to the need to listen to
1348 * additional unicast addresses in a device that
1349 * does not implement ndo_set_rx_mode()
1350 * @promiscuity: Number of times, the NIC is told to work in
1351 * Promiscuous mode, if it becomes 0 the NIC will
1352 * exit from working in Promiscuous mode
1353 * @allmulti: Counter, enables or disables allmulticast mode
1355 * @vlan_info: VLAN info
1356 * @dsa_ptr: dsa specific data
1357 * @tipc_ptr: TIPC specific data
1358 * @atalk_ptr: AppleTalk link
1359 * @ip_ptr: IPv4 specific data
1360 * @dn_ptr: DECnet specific data
1361 * @ip6_ptr: IPv6 specific data
1362 * @ax25_ptr: AX.25 specific data
1363 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1365 * @last_rx: Time of last Rx
1366 * @dev_addr: Hw address (before bcast,
1367 * because most packets are unicast)
1369 * @_rx: Array of RX queues
1370 * @num_rx_queues: Number of RX queues
1371 * allocated at register_netdev() time
1372 * @real_num_rx_queues: Number of RX queues currently active in device
1374 * @rx_handler: handler for received packets
1375 * @rx_handler_data: XXX: need comments on this one
1376 * @ingress_queue: XXX: need comments on this one
1377 * @broadcast: hw bcast address
1379 * @_tx: Array of TX queues
1380 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1381 * @real_num_tx_queues: Number of TX queues currently active in device
1382 * @qdisc: Root qdisc from userspace point of view
1383 * @tx_queue_len: Max frames per queue allowed
1384 * @tx_global_lock: XXX: need comments on this one
1386 * @xps_maps: XXX: need comments on this one
1388 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1389 * indexed by RX queue number. Assigned by driver.
1390 * This must only be set if the ndo_rx_flow_steer
1391 * operation is defined
1393 * @trans_start: Time (in jiffies) of last Tx
1394 * @watchdog_timeo: Represents the timeout that is used by
1395 * the watchdog ( see dev_watchdog() )
1396 * @watchdog_timer: List of timers
1398 * @pcpu_refcnt: Number of references to this device
1399 * @todo_list: Delayed register/unregister
1400 * @index_hlist: Device index hash chain
1401 * @link_watch_list: XXX: need comments on this one
1403 * @reg_state: Register/unregister state machine
1404 * @dismantle: Device is going to be freed
1405 * @rtnl_link_state: This enum represents the phases of creating
1408 * @destructor: Called from unregister,
1409 * can be used to call free_netdev
1410 * @npinfo: XXX: need comments on this one
1411 * @nd_net: Network namespace this network device is inside
1413 * @ml_priv: Mid-layer private
1414 * @lstats: Loopback statistics
1415 * @tstats: Tunnel statistics
1416 * @dstats: Dummy statistics
1417 * @vstats: Virtual ethernet statistics
1422 * @dev: Class/net/name entry
1423 * @sysfs_groups: Space for optional device, statistics and wireless
1426 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1427 * @rtnl_link_ops: Rtnl_link_ops
1429 * @gso_max_size: Maximum size of generic segmentation offload
1430 * @gso_max_segs: Maximum number of segments that can be passed to the
1432 * @gso_min_segs: Minimum number of segments that can be passed to the
1435 * @dcbnl_ops: Data Center Bridging netlink ops
1436 * @num_tc: Number of traffic classes in the net device
1437 * @tc_to_txq: XXX: need comments on this one
1438 * @prio_tc_map XXX: need comments on this one
1440 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1442 * @priomap: XXX: need comments on this one
1443 * @phydev: Physical device may attach itself
1444 * for hardware timestamping
1446 * @qdisc_tx_busylock: XXX: need comments on this one
1448 * @group: The group, that the device belongs to
1449 * @pm_qos_req: Power Management QoS object
1451 * FIXME: cleanup struct net_device such that network protocol info
1456 char name[IFNAMSIZ];
1457 struct hlist_node name_hlist;
1460 * I/O specific fields
1461 * FIXME: Merge these and struct ifmap into one
1463 unsigned long mem_end;
1464 unsigned long mem_start;
1465 unsigned long base_addr;
1469 * Some hardware also needs these fields (state,dev_list,
1470 * napi_list,unreg_list,close_list) but they are not
1471 * part of the usual set specified in Space.c.
1474 unsigned long state;
1476 struct list_head dev_list;
1477 struct list_head napi_list;
1478 struct list_head unreg_list;
1479 struct list_head close_list;
1482 struct list_head upper;
1483 struct list_head lower;
1487 struct list_head upper;
1488 struct list_head lower;
1491 netdev_features_t features;
1492 netdev_features_t hw_features;
1493 netdev_features_t wanted_features;
1494 netdev_features_t vlan_features;
1495 netdev_features_t hw_enc_features;
1496 netdev_features_t mpls_features;
1501 struct net_device_stats stats;
1503 atomic_long_t rx_dropped;
1504 atomic_long_t tx_dropped;
1506 atomic_t carrier_changes;
1508 #ifdef CONFIG_WIRELESS_EXT
1509 const struct iw_handler_def * wireless_handlers;
1510 struct iw_public_data * wireless_data;
1512 const struct net_device_ops *netdev_ops;
1513 const struct ethtool_ops *ethtool_ops;
1514 const struct forwarding_accel_ops *fwd_ops;
1516 const struct header_ops *header_ops;
1519 unsigned int priv_flags;
1521 unsigned short gflags;
1522 unsigned short padded;
1524 unsigned char operstate;
1525 unsigned char link_mode;
1527 unsigned char if_port;
1531 unsigned short type;
1532 unsigned short hard_header_len;
1534 unsigned short needed_headroom;
1535 unsigned short needed_tailroom;
1537 /* Interface address info. */
1538 unsigned char perm_addr[MAX_ADDR_LEN];
1539 unsigned char addr_assign_type;
1540 unsigned char addr_len;
1541 unsigned short neigh_priv_len;
1542 unsigned short dev_id;
1543 unsigned short dev_port;
1544 spinlock_t addr_list_lock;
1545 struct netdev_hw_addr_list uc;
1546 struct netdev_hw_addr_list mc;
1547 struct netdev_hw_addr_list dev_addrs;
1550 struct kset *queues_kset;
1553 unsigned char name_assign_type;
1556 unsigned int promiscuity;
1557 unsigned int allmulti;
1560 /* Protocol specific pointers */
1562 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1563 struct vlan_info __rcu *vlan_info;
1565 #if IS_ENABLED(CONFIG_NET_DSA)
1566 struct dsa_switch_tree *dsa_ptr;
1568 #if IS_ENABLED(CONFIG_TIPC)
1569 struct tipc_bearer __rcu *tipc_ptr;
1572 struct in_device __rcu *ip_ptr;
1573 struct dn_dev __rcu *dn_ptr;
1574 struct inet6_dev __rcu *ip6_ptr;
1576 struct wireless_dev *ieee80211_ptr;
1577 struct wpan_dev *ieee802154_ptr;
1580 * Cache lines mostly used on receive path (including eth_type_trans())
1582 unsigned long last_rx;
1584 /* Interface address info used in eth_type_trans() */
1585 unsigned char *dev_addr;
1589 struct netdev_rx_queue *_rx;
1591 unsigned int num_rx_queues;
1592 unsigned int real_num_rx_queues;
1596 rx_handler_func_t __rcu *rx_handler;
1597 void __rcu *rx_handler_data;
1599 struct netdev_queue __rcu *ingress_queue;
1600 unsigned char broadcast[MAX_ADDR_LEN];
1604 * Cache lines mostly used on transmit path
1606 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1607 unsigned int num_tx_queues;
1608 unsigned int real_num_tx_queues;
1609 struct Qdisc *qdisc;
1610 unsigned long tx_queue_len;
1611 spinlock_t tx_global_lock;
1614 struct xps_dev_maps __rcu *xps_maps;
1616 #ifdef CONFIG_RFS_ACCEL
1617 struct cpu_rmap *rx_cpu_rmap;
1620 /* These may be needed for future network-power-down code. */
1623 * trans_start here is expensive for high speed devices on SMP,
1624 * please use netdev_queue->trans_start instead.
1626 unsigned long trans_start;
1629 struct timer_list watchdog_timer;
1631 int __percpu *pcpu_refcnt;
1632 struct list_head todo_list;
1634 struct hlist_node index_hlist;
1635 struct list_head link_watch_list;
1637 enum { NETREG_UNINITIALIZED=0,
1638 NETREG_REGISTERED, /* completed register_netdevice */
1639 NETREG_UNREGISTERING, /* called unregister_netdevice */
1640 NETREG_UNREGISTERED, /* completed unregister todo */
1641 NETREG_RELEASED, /* called free_netdev */
1642 NETREG_DUMMY, /* dummy device for NAPI poll */
1648 RTNL_LINK_INITIALIZED,
1649 RTNL_LINK_INITIALIZING,
1650 } rtnl_link_state:16;
1652 void (*destructor)(struct net_device *dev);
1654 #ifdef CONFIG_NETPOLL
1655 struct netpoll_info __rcu *npinfo;
1658 #ifdef CONFIG_NET_NS
1662 /* mid-layer private */
1665 struct pcpu_lstats __percpu *lstats;
1666 struct pcpu_sw_netstats __percpu *tstats;
1667 struct pcpu_dstats __percpu *dstats;
1668 struct pcpu_vstats __percpu *vstats;
1671 struct garp_port __rcu *garp_port;
1672 struct mrp_port __rcu *mrp_port;
1675 const struct attribute_group *sysfs_groups[4];
1676 const struct attribute_group *sysfs_rx_queue_group;
1678 const struct rtnl_link_ops *rtnl_link_ops;
1680 /* for setting kernel sock attribute on TCP connection setup */
1681 #define GSO_MAX_SIZE 65536
1682 unsigned int gso_max_size;
1683 #define GSO_MAX_SEGS 65535
1687 const struct dcbnl_rtnl_ops *dcbnl_ops;
1690 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1691 u8 prio_tc_map[TC_BITMASK + 1];
1693 #if IS_ENABLED(CONFIG_FCOE)
1694 unsigned int fcoe_ddp_xid;
1696 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1697 struct netprio_map __rcu *priomap;
1699 struct phy_device *phydev;
1700 struct lock_class_key *qdisc_tx_busylock;
1702 struct pm_qos_request pm_qos_req;
1704 #define to_net_dev(d) container_of(d, struct net_device, dev)
1706 #define NETDEV_ALIGN 32
1709 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1711 return dev->prio_tc_map[prio & TC_BITMASK];
1715 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1717 if (tc >= dev->num_tc)
1720 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1725 void netdev_reset_tc(struct net_device *dev)
1728 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1729 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1733 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1735 if (tc >= dev->num_tc)
1738 dev->tc_to_txq[tc].count = count;
1739 dev->tc_to_txq[tc].offset = offset;
1744 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1746 if (num_tc > TC_MAX_QUEUE)
1749 dev->num_tc = num_tc;
1754 int netdev_get_num_tc(struct net_device *dev)
1760 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1763 return &dev->_tx[index];
1766 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
1767 const struct sk_buff *skb)
1769 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
1772 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1773 void (*f)(struct net_device *,
1774 struct netdev_queue *,
1780 for (i = 0; i < dev->num_tx_queues; i++)
1781 f(dev, &dev->_tx[i], arg);
1784 struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1785 struct sk_buff *skb,
1789 * Net namespace inlines
1792 struct net *dev_net(const struct net_device *dev)
1794 return read_pnet(&dev->nd_net);
1798 void dev_net_set(struct net_device *dev, struct net *net)
1800 #ifdef CONFIG_NET_NS
1801 release_net(dev->nd_net);
1802 dev->nd_net = hold_net(net);
1806 static inline bool netdev_uses_dsa(struct net_device *dev)
1808 #if IS_ENABLED(CONFIG_NET_DSA)
1809 if (dev->dsa_ptr != NULL)
1810 return dsa_uses_tagged_protocol(dev->dsa_ptr);
1816 * netdev_priv - access network device private data
1817 * @dev: network device
1819 * Get network device private data
1821 static inline void *netdev_priv(const struct net_device *dev)
1823 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1826 /* Set the sysfs physical device reference for the network logical device
1827 * if set prior to registration will cause a symlink during initialization.
1829 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1831 /* Set the sysfs device type for the network logical device to allow
1832 * fine-grained identification of different network device types. For
1833 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1835 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1837 /* Default NAPI poll() weight
1838 * Device drivers are strongly advised to not use bigger value
1840 #define NAPI_POLL_WEIGHT 64
1843 * netif_napi_add - initialize a napi context
1844 * @dev: network device
1845 * @napi: napi context
1846 * @poll: polling function
1847 * @weight: default weight
1849 * netif_napi_add() must be used to initialize a napi context prior to calling
1850 * *any* of the other napi related functions.
1852 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1853 int (*poll)(struct napi_struct *, int), int weight);
1856 * netif_napi_del - remove a napi context
1857 * @napi: napi context
1859 * netif_napi_del() removes a napi context from the network device napi list
1861 void netif_napi_del(struct napi_struct *napi);
1863 struct napi_gro_cb {
1864 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1867 /* Length of frag0. */
1868 unsigned int frag0_len;
1870 /* This indicates where we are processing relative to skb->data. */
1873 /* This is non-zero if the packet cannot be merged with the new skb. */
1876 /* Save the IP ID here and check when we get to the transport layer */
1879 /* Number of segments aggregated. */
1882 /* This is non-zero if the packet may be of the same flow. */
1887 #define NAPI_GRO_FREE 1
1888 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1890 /* jiffies when first packet was created/queued */
1893 /* Used in ipv6_gro_receive() and foo-over-udp */
1896 /* Used in udp_gro_receive */
1899 /* GRO checksum is valid */
1902 /* Number of checksums via CHECKSUM_UNNECESSARY */
1905 /* Used in foo-over-udp, set in udp[46]_gro_receive */
1908 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
1911 /* used in skb_gro_receive() slow path */
1912 struct sk_buff *last;
1915 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1917 struct packet_type {
1918 __be16 type; /* This is really htons(ether_type). */
1919 struct net_device *dev; /* NULL is wildcarded here */
1920 int (*func) (struct sk_buff *,
1921 struct net_device *,
1922 struct packet_type *,
1923 struct net_device *);
1924 bool (*id_match)(struct packet_type *ptype,
1926 void *af_packet_priv;
1927 struct list_head list;
1930 struct offload_callbacks {
1931 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1932 netdev_features_t features);
1933 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1934 struct sk_buff *skb);
1935 int (*gro_complete)(struct sk_buff *skb, int nhoff);
1938 struct packet_offload {
1939 __be16 type; /* This is really htons(ether_type). */
1940 struct offload_callbacks callbacks;
1941 struct list_head list;
1944 struct udp_offload {
1947 struct offload_callbacks callbacks;
1950 /* often modified stats are per cpu, other are shared (netdev->stats) */
1951 struct pcpu_sw_netstats {
1956 struct u64_stats_sync syncp;
1959 #define netdev_alloc_pcpu_stats(type) \
1961 typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
1964 for_each_possible_cpu(i) { \
1965 typeof(type) *stat; \
1966 stat = per_cpu_ptr(pcpu_stats, i); \
1967 u64_stats_init(&stat->syncp); \
1973 #include <linux/notifier.h>
1975 /* netdevice notifier chain. Please remember to update the rtnetlink
1976 * notification exclusion list in rtnetlink_event() when adding new
1979 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1980 #define NETDEV_DOWN 0x0002
1981 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1982 detected a hardware crash and restarted
1983 - we can use this eg to kick tcp sessions
1985 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1986 #define NETDEV_REGISTER 0x0005
1987 #define NETDEV_UNREGISTER 0x0006
1988 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
1989 #define NETDEV_CHANGEADDR 0x0008
1990 #define NETDEV_GOING_DOWN 0x0009
1991 #define NETDEV_CHANGENAME 0x000A
1992 #define NETDEV_FEAT_CHANGE 0x000B
1993 #define NETDEV_BONDING_FAILOVER 0x000C
1994 #define NETDEV_PRE_UP 0x000D
1995 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1996 #define NETDEV_POST_TYPE_CHANGE 0x000F
1997 #define NETDEV_POST_INIT 0x0010
1998 #define NETDEV_UNREGISTER_FINAL 0x0011
1999 #define NETDEV_RELEASE 0x0012
2000 #define NETDEV_NOTIFY_PEERS 0x0013
2001 #define NETDEV_JOIN 0x0014
2002 #define NETDEV_CHANGEUPPER 0x0015
2003 #define NETDEV_RESEND_IGMP 0x0016
2004 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
2005 #define NETDEV_CHANGEINFODATA 0x0018
2007 int register_netdevice_notifier(struct notifier_block *nb);
2008 int unregister_netdevice_notifier(struct notifier_block *nb);
2010 struct netdev_notifier_info {
2011 struct net_device *dev;
2014 struct netdev_notifier_change_info {
2015 struct netdev_notifier_info info; /* must be first */
2016 unsigned int flags_changed;
2019 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2020 struct net_device *dev)
2025 static inline struct net_device *
2026 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2031 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2034 extern rwlock_t dev_base_lock; /* Device list lock */
2036 #define for_each_netdev(net, d) \
2037 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2038 #define for_each_netdev_reverse(net, d) \
2039 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2040 #define for_each_netdev_rcu(net, d) \
2041 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2042 #define for_each_netdev_safe(net, d, n) \
2043 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2044 #define for_each_netdev_continue(net, d) \
2045 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2046 #define for_each_netdev_continue_rcu(net, d) \
2047 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2048 #define for_each_netdev_in_bond_rcu(bond, slave) \
2049 for_each_netdev_rcu(&init_net, slave) \
2050 if (netdev_master_upper_dev_get_rcu(slave) == bond)
2051 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2053 static inline struct net_device *next_net_device(struct net_device *dev)
2055 struct list_head *lh;
2059 lh = dev->dev_list.next;
2060 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2063 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2065 struct list_head *lh;
2069 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2070 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2073 static inline struct net_device *first_net_device(struct net *net)
2075 return list_empty(&net->dev_base_head) ? NULL :
2076 net_device_entry(net->dev_base_head.next);
2079 static inline struct net_device *first_net_device_rcu(struct net *net)
2081 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2083 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2086 int netdev_boot_setup_check(struct net_device *dev);
2087 unsigned long netdev_boot_base(const char *prefix, int unit);
2088 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2089 const char *hwaddr);
2090 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2091 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2092 void dev_add_pack(struct packet_type *pt);
2093 void dev_remove_pack(struct packet_type *pt);
2094 void __dev_remove_pack(struct packet_type *pt);
2095 void dev_add_offload(struct packet_offload *po);
2096 void dev_remove_offload(struct packet_offload *po);
2098 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2099 unsigned short mask);
2100 struct net_device *dev_get_by_name(struct net *net, const char *name);
2101 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2102 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2103 int dev_alloc_name(struct net_device *dev, const char *name);
2104 int dev_open(struct net_device *dev);
2105 int dev_close(struct net_device *dev);
2106 void dev_disable_lro(struct net_device *dev);
2107 int dev_loopback_xmit(struct sk_buff *newskb);
2108 int dev_queue_xmit(struct sk_buff *skb);
2109 int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2110 int register_netdevice(struct net_device *dev);
2111 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2112 void unregister_netdevice_many(struct list_head *head);
2113 static inline void unregister_netdevice(struct net_device *dev)
2115 unregister_netdevice_queue(dev, NULL);
2118 int netdev_refcnt_read(const struct net_device *dev);
2119 void free_netdev(struct net_device *dev);
2120 void netdev_freemem(struct net_device *dev);
2121 void synchronize_net(void);
2122 int init_dummy_netdev(struct net_device *dev);
2124 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2125 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2126 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2127 int netdev_get_name(struct net *net, char *name, int ifindex);
2128 int dev_restart(struct net_device *dev);
2129 int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2131 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2133 return NAPI_GRO_CB(skb)->data_offset;
2136 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2138 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2141 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2143 NAPI_GRO_CB(skb)->data_offset += len;
2146 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2147 unsigned int offset)
2149 return NAPI_GRO_CB(skb)->frag0 + offset;
2152 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2154 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2157 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2158 unsigned int offset)
2160 if (!pskb_may_pull(skb, hlen))
2163 NAPI_GRO_CB(skb)->frag0 = NULL;
2164 NAPI_GRO_CB(skb)->frag0_len = 0;
2165 return skb->data + offset;
2168 static inline void *skb_gro_network_header(struct sk_buff *skb)
2170 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2171 skb_network_offset(skb);
2174 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2175 const void *start, unsigned int len)
2177 if (NAPI_GRO_CB(skb)->csum_valid)
2178 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2179 csum_partial(start, len, 0));
2182 /* GRO checksum functions. These are logical equivalents of the normal
2183 * checksum functions (in skbuff.h) except that they operate on the GRO
2184 * offsets and fields in sk_buff.
2187 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2189 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2193 return (skb->ip_summed != CHECKSUM_PARTIAL &&
2194 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2195 (!zero_okay || check));
2198 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2201 if (NAPI_GRO_CB(skb)->csum_valid &&
2202 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2205 NAPI_GRO_CB(skb)->csum = psum;
2207 return __skb_gro_checksum_complete(skb);
2210 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2212 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2213 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2214 NAPI_GRO_CB(skb)->csum_cnt--;
2216 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2217 * verified a new top level checksum or an encapsulated one
2218 * during GRO. This saves work if we fallback to normal path.
2220 __skb_incr_checksum_unnecessary(skb);
2224 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2227 __sum16 __ret = 0; \
2228 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2229 __ret = __skb_gro_checksum_validate_complete(skb, \
2230 compute_pseudo(skb, proto)); \
2232 __skb_mark_checksum_bad(skb); \
2234 skb_gro_incr_csum_unnecessary(skb); \
2238 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2239 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2241 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2243 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2245 #define skb_gro_checksum_simple_validate(skb) \
2246 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2248 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2250 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2251 !NAPI_GRO_CB(skb)->csum_valid);
2254 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2255 __sum16 check, __wsum pseudo)
2257 NAPI_GRO_CB(skb)->csum = ~pseudo;
2258 NAPI_GRO_CB(skb)->csum_valid = 1;
2261 #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
2263 if (__skb_gro_checksum_convert_check(skb)) \
2264 __skb_gro_checksum_convert(skb, check, \
2265 compute_pseudo(skb, proto)); \
2268 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2269 unsigned short type,
2270 const void *daddr, const void *saddr,
2273 if (!dev->header_ops || !dev->header_ops->create)
2276 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2279 static inline int dev_parse_header(const struct sk_buff *skb,
2280 unsigned char *haddr)
2282 const struct net_device *dev = skb->dev;
2284 if (!dev->header_ops || !dev->header_ops->parse)
2286 return dev->header_ops->parse(skb, haddr);
2289 static inline int dev_rebuild_header(struct sk_buff *skb)
2291 const struct net_device *dev = skb->dev;
2293 if (!dev->header_ops || !dev->header_ops->rebuild)
2295 return dev->header_ops->rebuild(skb);
2298 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2299 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
2300 static inline int unregister_gifconf(unsigned int family)
2302 return register_gifconf(family, NULL);
2305 #ifdef CONFIG_NET_FLOW_LIMIT
2306 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2307 struct sd_flow_limit {
2309 unsigned int num_buckets;
2310 unsigned int history_head;
2311 u16 history[FLOW_LIMIT_HISTORY];
2315 extern int netdev_flow_limit_table_len;
2316 #endif /* CONFIG_NET_FLOW_LIMIT */
2319 * Incoming packets are placed on per-cpu queues
2321 struct softnet_data {
2322 struct Qdisc *output_queue;
2323 struct Qdisc **output_queue_tailp;
2324 struct list_head poll_list;
2325 struct sk_buff *completion_queue;
2326 struct sk_buff_head process_queue;
2329 unsigned int processed;
2330 unsigned int time_squeeze;
2331 unsigned int cpu_collision;
2332 unsigned int received_rps;
2335 struct softnet_data *rps_ipi_list;
2337 /* Elements below can be accessed between CPUs for RPS */
2338 struct call_single_data csd ____cacheline_aligned_in_smp;
2339 struct softnet_data *rps_ipi_next;
2341 unsigned int input_queue_head;
2342 unsigned int input_queue_tail;
2344 unsigned int dropped;
2345 struct sk_buff_head input_pkt_queue;
2346 struct napi_struct backlog;
2348 #ifdef CONFIG_NET_FLOW_LIMIT
2349 struct sd_flow_limit __rcu *flow_limit;
2353 static inline void input_queue_head_incr(struct softnet_data *sd)
2356 sd->input_queue_head++;
2360 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
2361 unsigned int *qtail)
2364 *qtail = ++sd->input_queue_tail;
2368 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
2370 void __netif_schedule(struct Qdisc *q);
2371 void netif_schedule_queue(struct netdev_queue *txq);
2373 static inline void netif_tx_schedule_all(struct net_device *dev)
2377 for (i = 0; i < dev->num_tx_queues; i++)
2378 netif_schedule_queue(netdev_get_tx_queue(dev, i));
2381 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
2383 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2387 * netif_start_queue - allow transmit
2388 * @dev: network device
2390 * Allow upper layers to call the device hard_start_xmit routine.
2392 static inline void netif_start_queue(struct net_device *dev)
2394 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
2397 static inline void netif_tx_start_all_queues(struct net_device *dev)
2401 for (i = 0; i < dev->num_tx_queues; i++) {
2402 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2403 netif_tx_start_queue(txq);
2407 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2410 * netif_wake_queue - restart transmit
2411 * @dev: network device
2413 * Allow upper layers to call the device hard_start_xmit routine.
2414 * Used for flow control when transmit resources are available.
2416 static inline void netif_wake_queue(struct net_device *dev)
2418 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
2421 static inline void netif_tx_wake_all_queues(struct net_device *dev)
2425 for (i = 0; i < dev->num_tx_queues; i++) {
2426 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2427 netif_tx_wake_queue(txq);
2431 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
2433 if (WARN_ON(!dev_queue)) {
2434 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
2437 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2441 * netif_stop_queue - stop transmitted packets
2442 * @dev: network device
2444 * Stop upper layers calling the device hard_start_xmit routine.
2445 * Used for flow control when transmit resources are unavailable.
2447 static inline void netif_stop_queue(struct net_device *dev)
2449 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
2452 static inline void netif_tx_stop_all_queues(struct net_device *dev)
2456 for (i = 0; i < dev->num_tx_queues; i++) {
2457 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2458 netif_tx_stop_queue(txq);
2462 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2464 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2468 * netif_queue_stopped - test if transmit queue is flowblocked
2469 * @dev: network device
2471 * Test if transmit queue on device is currently unable to send.
2473 static inline bool netif_queue_stopped(const struct net_device *dev)
2475 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
2478 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2480 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
2484 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2486 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2490 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
2492 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
2496 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
2497 * @dev_queue: pointer to transmit queue
2499 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
2500 * to give appropriate hint to the cpu.
2502 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
2505 prefetchw(&dev_queue->dql.num_queued);
2510 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
2511 * @dev_queue: pointer to transmit queue
2513 * BQL enabled drivers might use this helper in their TX completion path,
2514 * to give appropriate hint to the cpu.
2516 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
2519 prefetchw(&dev_queue->dql.limit);
2523 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2527 dql_queued(&dev_queue->dql, bytes);
2529 if (likely(dql_avail(&dev_queue->dql) >= 0))
2532 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2535 * The XOFF flag must be set before checking the dql_avail below,
2536 * because in netdev_tx_completed_queue we update the dql_completed
2537 * before checking the XOFF flag.
2541 /* check again in case another CPU has just made room avail */
2542 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2543 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2548 * netdev_sent_queue - report the number of bytes queued to hardware
2549 * @dev: network device
2550 * @bytes: number of bytes queued to the hardware device queue
2552 * Report the number of bytes queued for sending/completion to the network
2553 * device hardware queue. @bytes should be a good approximation and should
2554 * exactly match netdev_completed_queue() @bytes
2556 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2558 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2561 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2562 unsigned int pkts, unsigned int bytes)
2565 if (unlikely(!bytes))
2568 dql_completed(&dev_queue->dql, bytes);
2571 * Without the memory barrier there is a small possiblity that
2572 * netdev_tx_sent_queue will miss the update and cause the queue to
2573 * be stopped forever
2577 if (dql_avail(&dev_queue->dql) < 0)
2580 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2581 netif_schedule_queue(dev_queue);
2586 * netdev_completed_queue - report bytes and packets completed by device
2587 * @dev: network device
2588 * @pkts: actual number of packets sent over the medium
2589 * @bytes: actual number of bytes sent over the medium
2591 * Report the number of bytes and packets transmitted by the network device
2592 * hardware queue over the physical medium, @bytes must exactly match the
2593 * @bytes amount passed to netdev_sent_queue()
2595 static inline void netdev_completed_queue(struct net_device *dev,
2596 unsigned int pkts, unsigned int bytes)
2598 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2601 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2604 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
2610 * netdev_reset_queue - reset the packets and bytes count of a network device
2611 * @dev_queue: network device
2613 * Reset the bytes and packet count of a network device and clear the
2614 * software flow control OFF bit for this network device
2616 static inline void netdev_reset_queue(struct net_device *dev_queue)
2618 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2622 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2623 * @dev: network device
2624 * @queue_index: given tx queue index
2626 * Returns 0 if given tx queue index >= number of device tx queues,
2627 * otherwise returns the originally passed tx queue index.
2629 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
2631 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
2632 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2633 dev->name, queue_index,
2634 dev->real_num_tx_queues);
2642 * netif_running - test if up
2643 * @dev: network device
2645 * Test if the device has been brought up.
2647 static inline bool netif_running(const struct net_device *dev)
2649 return test_bit(__LINK_STATE_START, &dev->state);
2653 * Routines to manage the subqueues on a device. We only need start
2654 * stop, and a check if it's stopped. All other device management is
2655 * done at the overall netdevice level.
2656 * Also test the device if we're multiqueue.
2660 * netif_start_subqueue - allow sending packets on subqueue
2661 * @dev: network device
2662 * @queue_index: sub queue index
2664 * Start individual transmit queue of a device with multiple transmit queues.
2666 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2668 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2670 netif_tx_start_queue(txq);
2674 * netif_stop_subqueue - stop sending packets on subqueue
2675 * @dev: network device
2676 * @queue_index: sub queue index
2678 * Stop individual transmit queue of a device with multiple transmit queues.
2680 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
2682 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2683 netif_tx_stop_queue(txq);
2687 * netif_subqueue_stopped - test status of subqueue
2688 * @dev: network device
2689 * @queue_index: sub queue index
2691 * Check individual transmit queue of a device with multiple transmit queues.
2693 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
2696 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2698 return netif_tx_queue_stopped(txq);
2701 static inline bool netif_subqueue_stopped(const struct net_device *dev,
2702 struct sk_buff *skb)
2704 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
2707 void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
2710 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
2713 static inline int netif_set_xps_queue(struct net_device *dev,
2714 const struct cpumask *mask,
2722 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2723 * as a distribution range limit for the returned value.
2725 static inline u16 skb_tx_hash(const struct net_device *dev,
2726 struct sk_buff *skb)
2728 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2732 * netif_is_multiqueue - test if device has multiple transmit queues
2733 * @dev: network device
2735 * Check if device has multiple transmit queues
2737 static inline bool netif_is_multiqueue(const struct net_device *dev)
2739 return dev->num_tx_queues > 1;
2742 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
2745 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
2747 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2754 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
2755 const struct net_device *from_dev)
2759 err = netif_set_real_num_tx_queues(to_dev,
2760 from_dev->real_num_tx_queues);
2764 return netif_set_real_num_rx_queues(to_dev,
2765 from_dev->real_num_rx_queues);
2772 static inline unsigned int get_netdev_rx_queue_index(
2773 struct netdev_rx_queue *queue)
2775 struct net_device *dev = queue->dev;
2776 int index = queue - dev->_rx;
2778 BUG_ON(index >= dev->num_rx_queues);
2783 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2784 int netif_get_num_default_rss_queues(void);
2786 enum skb_free_reason {
2787 SKB_REASON_CONSUMED,
2791 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
2792 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
2795 * It is not allowed to call kfree_skb() or consume_skb() from hardware
2796 * interrupt context or with hardware interrupts being disabled.
2797 * (in_irq() || irqs_disabled())
2799 * We provide four helpers that can be used in following contexts :
2801 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
2802 * replacing kfree_skb(skb)
2804 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
2805 * Typically used in place of consume_skb(skb) in TX completion path
2807 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
2808 * replacing kfree_skb(skb)
2810 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
2811 * and consumed a packet. Used in place of consume_skb(skb)
2813 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
2815 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
2818 static inline void dev_consume_skb_irq(struct sk_buff *skb)
2820 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
2823 static inline void dev_kfree_skb_any(struct sk_buff *skb)
2825 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
2828 static inline void dev_consume_skb_any(struct sk_buff *skb)
2830 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
2833 int netif_rx(struct sk_buff *skb);
2834 int netif_rx_ni(struct sk_buff *skb);
2835 int netif_receive_skb(struct sk_buff *skb);
2836 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
2837 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
2838 struct sk_buff *napi_get_frags(struct napi_struct *napi);
2839 gro_result_t napi_gro_frags(struct napi_struct *napi);
2840 struct packet_offload *gro_find_receive_by_type(__be16 type);
2841 struct packet_offload *gro_find_complete_by_type(__be16 type);
2843 static inline void napi_free_frags(struct napi_struct *napi)
2845 kfree_skb(napi->skb);
2849 int netdev_rx_handler_register(struct net_device *dev,
2850 rx_handler_func_t *rx_handler,
2851 void *rx_handler_data);
2852 void netdev_rx_handler_unregister(struct net_device *dev);
2854 bool dev_valid_name(const char *name);
2855 int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2856 int dev_ethtool(struct net *net, struct ifreq *);
2857 unsigned int dev_get_flags(const struct net_device *);
2858 int __dev_change_flags(struct net_device *, unsigned int flags);
2859 int dev_change_flags(struct net_device *, unsigned int);
2860 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
2861 unsigned int gchanges);
2862 int dev_change_name(struct net_device *, const char *);
2863 int dev_set_alias(struct net_device *, const char *, size_t);
2864 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
2865 int dev_set_mtu(struct net_device *, int);
2866 void dev_set_group(struct net_device *, int);
2867 int dev_set_mac_address(struct net_device *, struct sockaddr *);
2868 int dev_change_carrier(struct net_device *, bool new_carrier);
2869 int dev_get_phys_port_id(struct net_device *dev,
2870 struct netdev_phys_port_id *ppid);
2871 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
2872 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
2873 struct netdev_queue *txq, int *ret);
2874 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
2875 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
2876 bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
2878 extern int netdev_budget;
2880 /* Called by rtnetlink.c:rtnl_unlock() */
2881 void netdev_run_todo(void);
2884 * dev_put - release reference to device
2885 * @dev: network device
2887 * Release reference to device to allow it to be freed.
2889 static inline void dev_put(struct net_device *dev)
2891 this_cpu_dec(*dev->pcpu_refcnt);
2895 * dev_hold - get reference to device
2896 * @dev: network device
2898 * Hold reference to device to keep it from being freed.
2900 static inline void dev_hold(struct net_device *dev)
2902 this_cpu_inc(*dev->pcpu_refcnt);
2905 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2906 * and _off may be called from IRQ context, but it is caller
2907 * who is responsible for serialization of these calls.
2909 * The name carrier is inappropriate, these functions should really be
2910 * called netif_lowerlayer_*() because they represent the state of any
2911 * kind of lower layer not just hardware media.
2914 void linkwatch_init_dev(struct net_device *dev);
2915 void linkwatch_fire_event(struct net_device *dev);
2916 void linkwatch_forget_dev(struct net_device *dev);
2919 * netif_carrier_ok - test if carrier present
2920 * @dev: network device
2922 * Check if carrier is present on device
2924 static inline bool netif_carrier_ok(const struct net_device *dev)
2926 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2929 unsigned long dev_trans_start(struct net_device *dev);
2931 void __netdev_watchdog_up(struct net_device *dev);
2933 void netif_carrier_on(struct net_device *dev);
2935 void netif_carrier_off(struct net_device *dev);
2938 * netif_dormant_on - mark device as dormant.
2939 * @dev: network device
2941 * Mark device as dormant (as per RFC2863).
2943 * The dormant state indicates that the relevant interface is not
2944 * actually in a condition to pass packets (i.e., it is not 'up') but is
2945 * in a "pending" state, waiting for some external event. For "on-
2946 * demand" interfaces, this new state identifies the situation where the
2947 * interface is waiting for events to place it in the up state.
2950 static inline void netif_dormant_on(struct net_device *dev)
2952 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2953 linkwatch_fire_event(dev);
2957 * netif_dormant_off - set device as not dormant.
2958 * @dev: network device
2960 * Device is not in dormant state.
2962 static inline void netif_dormant_off(struct net_device *dev)
2964 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2965 linkwatch_fire_event(dev);
2969 * netif_dormant - test if carrier present
2970 * @dev: network device
2972 * Check if carrier is present on device
2974 static inline bool netif_dormant(const struct net_device *dev)
2976 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2981 * netif_oper_up - test if device is operational
2982 * @dev: network device
2984 * Check if carrier is operational
2986 static inline bool netif_oper_up(const struct net_device *dev)
2988 return (dev->operstate == IF_OPER_UP ||
2989 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2993 * netif_device_present - is device available or removed
2994 * @dev: network device
2996 * Check if device has not been removed from system.
2998 static inline bool netif_device_present(struct net_device *dev)
3000 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3003 void netif_device_detach(struct net_device *dev);
3005 void netif_device_attach(struct net_device *dev);
3008 * Network interface message level settings
3012 NETIF_MSG_DRV = 0x0001,
3013 NETIF_MSG_PROBE = 0x0002,
3014 NETIF_MSG_LINK = 0x0004,
3015 NETIF_MSG_TIMER = 0x0008,
3016 NETIF_MSG_IFDOWN = 0x0010,
3017 NETIF_MSG_IFUP = 0x0020,
3018 NETIF_MSG_RX_ERR = 0x0040,
3019 NETIF_MSG_TX_ERR = 0x0080,
3020 NETIF_MSG_TX_QUEUED = 0x0100,
3021 NETIF_MSG_INTR = 0x0200,
3022 NETIF_MSG_TX_DONE = 0x0400,
3023 NETIF_MSG_RX_STATUS = 0x0800,
3024 NETIF_MSG_PKTDATA = 0x1000,
3025 NETIF_MSG_HW = 0x2000,
3026 NETIF_MSG_WOL = 0x4000,
3029 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3030 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3031 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3032 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3033 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3034 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3035 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3036 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3037 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3038 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3039 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3040 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3041 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3042 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3043 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3045 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3048 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3049 return default_msg_enable_bits;
3050 if (debug_value == 0) /* no output */
3052 /* set low N bits */
3053 return (1 << debug_value) - 1;
3056 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
3058 spin_lock(&txq->_xmit_lock);
3059 txq->xmit_lock_owner = cpu;
3062 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
3064 spin_lock_bh(&txq->_xmit_lock);
3065 txq->xmit_lock_owner = smp_processor_id();
3068 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3070 bool ok = spin_trylock(&txq->_xmit_lock);
3072 txq->xmit_lock_owner = smp_processor_id();
3076 static inline void __netif_tx_unlock(struct netdev_queue *txq)
3078 txq->xmit_lock_owner = -1;
3079 spin_unlock(&txq->_xmit_lock);
3082 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
3084 txq->xmit_lock_owner = -1;
3085 spin_unlock_bh(&txq->_xmit_lock);
3088 static inline void txq_trans_update(struct netdev_queue *txq)
3090 if (txq->xmit_lock_owner != -1)
3091 txq->trans_start = jiffies;
3095 * netif_tx_lock - grab network device transmit lock
3096 * @dev: network device
3098 * Get network device transmit lock
3100 static inline void netif_tx_lock(struct net_device *dev)
3105 spin_lock(&dev->tx_global_lock);
3106 cpu = smp_processor_id();
3107 for (i = 0; i < dev->num_tx_queues; i++) {
3108 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3110 /* We are the only thread of execution doing a
3111 * freeze, but we have to grab the _xmit_lock in
3112 * order to synchronize with threads which are in
3113 * the ->hard_start_xmit() handler and already
3114 * checked the frozen bit.
3116 __netif_tx_lock(txq, cpu);
3117 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
3118 __netif_tx_unlock(txq);
3122 static inline void netif_tx_lock_bh(struct net_device *dev)
3128 static inline void netif_tx_unlock(struct net_device *dev)
3132 for (i = 0; i < dev->num_tx_queues; i++) {
3133 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3135 /* No need to grab the _xmit_lock here. If the
3136 * queue is not stopped for another reason, we
3139 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
3140 netif_schedule_queue(txq);
3142 spin_unlock(&dev->tx_global_lock);
3145 static inline void netif_tx_unlock_bh(struct net_device *dev)
3147 netif_tx_unlock(dev);
3151 #define HARD_TX_LOCK(dev, txq, cpu) { \
3152 if ((dev->features & NETIF_F_LLTX) == 0) { \
3153 __netif_tx_lock(txq, cpu); \
3157 #define HARD_TX_TRYLOCK(dev, txq) \
3158 (((dev->features & NETIF_F_LLTX) == 0) ? \
3159 __netif_tx_trylock(txq) : \
3162 #define HARD_TX_UNLOCK(dev, txq) { \
3163 if ((dev->features & NETIF_F_LLTX) == 0) { \
3164 __netif_tx_unlock(txq); \
3168 static inline void netif_tx_disable(struct net_device *dev)
3174 cpu = smp_processor_id();
3175 for (i = 0; i < dev->num_tx_queues; i++) {
3176 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3178 __netif_tx_lock(txq, cpu);
3179 netif_tx_stop_queue(txq);
3180 __netif_tx_unlock(txq);
3185 static inline void netif_addr_lock(struct net_device *dev)
3187 spin_lock(&dev->addr_list_lock);
3190 static inline void netif_addr_lock_nested(struct net_device *dev)
3192 int subclass = SINGLE_DEPTH_NESTING;
3194 if (dev->netdev_ops->ndo_get_lock_subclass)
3195 subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
3197 spin_lock_nested(&dev->addr_list_lock, subclass);
3200 static inline void netif_addr_lock_bh(struct net_device *dev)
3202 spin_lock_bh(&dev->addr_list_lock);
3205 static inline void netif_addr_unlock(struct net_device *dev)
3207 spin_unlock(&dev->addr_list_lock);
3210 static inline void netif_addr_unlock_bh(struct net_device *dev)
3212 spin_unlock_bh(&dev->addr_list_lock);
3216 * dev_addrs walker. Should be used only for read access. Call with
3217 * rcu_read_lock held.
3219 #define for_each_dev_addr(dev, ha) \
3220 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3222 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
3224 void ether_setup(struct net_device *dev);
3226 /* Support for loadable net-drivers */
3227 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3228 unsigned char name_assign_type,
3229 void (*setup)(struct net_device *),
3230 unsigned int txqs, unsigned int rxqs);
3231 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
3232 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
3234 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
3235 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
3238 int register_netdev(struct net_device *dev);
3239 void unregister_netdev(struct net_device *dev);
3241 /* General hardware address lists handling functions */
3242 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
3243 struct netdev_hw_addr_list *from_list, int addr_len);
3244 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
3245 struct netdev_hw_addr_list *from_list, int addr_len);
3246 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
3247 struct net_device *dev,
3248 int (*sync)(struct net_device *, const unsigned char *),
3249 int (*unsync)(struct net_device *,
3250 const unsigned char *));
3251 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
3252 struct net_device *dev,
3253 int (*unsync)(struct net_device *,
3254 const unsigned char *));
3255 void __hw_addr_init(struct netdev_hw_addr_list *list);
3257 /* Functions used for device addresses handling */
3258 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
3259 unsigned char addr_type);
3260 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
3261 unsigned char addr_type);
3262 void dev_addr_flush(struct net_device *dev);
3263 int dev_addr_init(struct net_device *dev);
3265 /* Functions used for unicast addresses handling */
3266 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
3267 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
3268 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
3269 int dev_uc_sync(struct net_device *to, struct net_device *from);
3270 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
3271 void dev_uc_unsync(struct net_device *to, struct net_device *from);
3272 void dev_uc_flush(struct net_device *dev);
3273 void dev_uc_init(struct net_device *dev);
3276 * __dev_uc_sync - Synchonize device's unicast list
3277 * @dev: device to sync
3278 * @sync: function to call if address should be added
3279 * @unsync: function to call if address should be removed
3281 * Add newly added addresses to the interface, and release
3282 * addresses that have been deleted.
3284 static inline int __dev_uc_sync(struct net_device *dev,
3285 int (*sync)(struct net_device *,
3286 const unsigned char *),
3287 int (*unsync)(struct net_device *,
3288 const unsigned char *))
3290 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
3294 * __dev_uc_unsync - Remove synchronized addresses from device
3295 * @dev: device to sync
3296 * @unsync: function to call if address should be removed
3298 * Remove all addresses that were added to the device by dev_uc_sync().
3300 static inline void __dev_uc_unsync(struct net_device *dev,
3301 int (*unsync)(struct net_device *,
3302 const unsigned char *))
3304 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
3307 /* Functions used for multicast addresses handling */
3308 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
3309 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
3310 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
3311 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
3312 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
3313 int dev_mc_sync(struct net_device *to, struct net_device *from);
3314 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
3315 void dev_mc_unsync(struct net_device *to, struct net_device *from);
3316 void dev_mc_flush(struct net_device *dev);
3317 void dev_mc_init(struct net_device *dev);
3320 * __dev_mc_sync - Synchonize device's multicast list
3321 * @dev: device to sync
3322 * @sync: function to call if address should be added
3323 * @unsync: function to call if address should be removed
3325 * Add newly added addresses to the interface, and release
3326 * addresses that have been deleted.
3328 static inline int __dev_mc_sync(struct net_device *dev,
3329 int (*sync)(struct net_device *,
3330 const unsigned char *),
3331 int (*unsync)(struct net_device *,
3332 const unsigned char *))
3334 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
3338 * __dev_mc_unsync - Remove synchronized addresses from device
3339 * @dev: device to sync
3340 * @unsync: function to call if address should be removed
3342 * Remove all addresses that were added to the device by dev_mc_sync().
3344 static inline void __dev_mc_unsync(struct net_device *dev,
3345 int (*unsync)(struct net_device *,
3346 const unsigned char *))
3348 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
3351 /* Functions used for secondary unicast and multicast support */
3352 void dev_set_rx_mode(struct net_device *dev);
3353 void __dev_set_rx_mode(struct net_device *dev);
3354 int dev_set_promiscuity(struct net_device *dev, int inc);
3355 int dev_set_allmulti(struct net_device *dev, int inc);
3356 void netdev_state_change(struct net_device *dev);
3357 void netdev_notify_peers(struct net_device *dev);
3358 void netdev_features_change(struct net_device *dev);
3359 /* Load a device via the kmod */
3360 void dev_load(struct net *net, const char *name);
3361 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
3362 struct rtnl_link_stats64 *storage);
3363 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
3364 const struct net_device_stats *netdev_stats);
3366 extern int netdev_max_backlog;
3367 extern int netdev_tstamp_prequeue;
3368 extern int weight_p;
3369 extern int bpf_jit_enable;
3371 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3372 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
3373 struct list_head **iter);
3374 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
3375 struct list_head **iter);
3377 /* iterate through upper list, must be called under RCU read lock */
3378 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3379 for (iter = &(dev)->adj_list.upper, \
3380 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3382 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3384 /* iterate through upper list, must be called under RCU read lock */
3385 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3386 for (iter = &(dev)->all_adj_list.upper, \
3387 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3389 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3391 void *netdev_lower_get_next_private(struct net_device *dev,
3392 struct list_head **iter);
3393 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
3394 struct list_head **iter);
3396 #define netdev_for_each_lower_private(dev, priv, iter) \
3397 for (iter = (dev)->adj_list.lower.next, \
3398 priv = netdev_lower_get_next_private(dev, &(iter)); \
3400 priv = netdev_lower_get_next_private(dev, &(iter)))
3402 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3403 for (iter = &(dev)->adj_list.lower, \
3404 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3406 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3408 void *netdev_lower_get_next(struct net_device *dev,
3409 struct list_head **iter);
3410 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3411 for (iter = &(dev)->adj_list.lower, \
3412 ldev = netdev_lower_get_next(dev, &(iter)); \
3414 ldev = netdev_lower_get_next(dev, &(iter)))
3416 void *netdev_adjacent_get_private(struct list_head *adj_list);
3417 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3418 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
3419 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
3420 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
3421 int netdev_master_upper_dev_link(struct net_device *dev,
3422 struct net_device *upper_dev);
3423 int netdev_master_upper_dev_link_private(struct net_device *dev,
3424 struct net_device *upper_dev,
3426 void netdev_upper_dev_unlink(struct net_device *dev,
3427 struct net_device *upper_dev);
3428 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3429 void *netdev_lower_dev_get_private(struct net_device *dev,
3430 struct net_device *lower_dev);
3431 int dev_get_nest_level(struct net_device *dev,
3432 bool (*type_check)(struct net_device *dev));
3433 int skb_checksum_help(struct sk_buff *skb);
3434 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
3435 netdev_features_t features, bool tx_path);
3436 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
3437 netdev_features_t features);
3440 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
3442 return __skb_gso_segment(skb, features, true);
3444 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3446 static inline bool can_checksum_protocol(netdev_features_t features,
3449 return ((features & NETIF_F_GEN_CSUM) ||
3450 ((features & NETIF_F_V4_CSUM) &&
3451 protocol == htons(ETH_P_IP)) ||
3452 ((features & NETIF_F_V6_CSUM) &&
3453 protocol == htons(ETH_P_IPV6)) ||
3454 ((features & NETIF_F_FCOE_CRC) &&
3455 protocol == htons(ETH_P_FCOE)));
3459 void netdev_rx_csum_fault(struct net_device *dev);
3461 static inline void netdev_rx_csum_fault(struct net_device *dev)
3465 /* rx skb timestamps */
3466 void net_enable_timestamp(void);
3467 void net_disable_timestamp(void);
3469 #ifdef CONFIG_PROC_FS
3470 int __init dev_proc_init(void);
3472 #define dev_proc_init() 0
3475 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3476 struct sk_buff *skb, struct net_device *dev,
3479 skb->xmit_more = more ? 1 : 0;
3480 return ops->ndo_start_xmit(skb, dev);
3483 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3484 struct netdev_queue *txq, bool more)
3486 const struct net_device_ops *ops = dev->netdev_ops;
3489 rc = __netdev_start_xmit(ops, skb, dev, more);
3490 if (rc == NETDEV_TX_OK)
3491 txq_trans_update(txq);
3496 int netdev_class_create_file_ns(struct class_attribute *class_attr,
3498 void netdev_class_remove_file_ns(struct class_attribute *class_attr,
3501 static inline int netdev_class_create_file(struct class_attribute *class_attr)
3503 return netdev_class_create_file_ns(class_attr, NULL);
3506 static inline void netdev_class_remove_file(struct class_attribute *class_attr)
3508 netdev_class_remove_file_ns(class_attr, NULL);
3511 extern struct kobj_ns_type_operations net_ns_type_operations;
3513 const char *netdev_drivername(const struct net_device *dev);
3515 void linkwatch_run_queue(void);
3517 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
3518 netdev_features_t f2)
3520 if (f1 & NETIF_F_GEN_CSUM)
3521 f1 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3522 if (f2 & NETIF_F_GEN_CSUM)
3523 f2 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3525 if (f1 & NETIF_F_GEN_CSUM)
3526 f1 &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
3531 static inline netdev_features_t netdev_get_wanted_features(
3532 struct net_device *dev)
3534 return (dev->features & ~dev->hw_features) | dev->wanted_features;
3536 netdev_features_t netdev_increment_features(netdev_features_t all,
3537 netdev_features_t one, netdev_features_t mask);
3539 /* Allow TSO being used on stacked device :
3540 * Performing the GSO segmentation before last device
3541 * is a performance improvement.
3543 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
3544 netdev_features_t mask)
3546 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
3549 int __netdev_update_features(struct net_device *dev);
3550 void netdev_update_features(struct net_device *dev);
3551 void netdev_change_features(struct net_device *dev);
3553 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
3554 struct net_device *dev);
3556 netdev_features_t netif_skb_features(struct sk_buff *skb);
3558 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
3560 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
3562 /* check flags correspondence */
3563 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
3564 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
3565 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
3566 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
3567 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
3568 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
3569 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
3570 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
3571 BUILD_BUG_ON(SKB_GSO_IPIP != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT));
3572 BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT));
3573 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
3574 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
3575 BUILD_BUG_ON(SKB_GSO_MPLS != (NETIF_F_GSO_MPLS >> NETIF_F_GSO_SHIFT));
3577 return (features & feature) == feature;
3580 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
3582 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
3583 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
3586 static inline bool netif_needs_gso(struct net_device *dev, struct sk_buff *skb,
3587 netdev_features_t features)
3589 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
3590 (dev->netdev_ops->ndo_gso_check &&
3591 !dev->netdev_ops->ndo_gso_check(skb, dev)) ||
3592 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
3593 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
3596 static inline void netif_set_gso_max_size(struct net_device *dev,
3599 dev->gso_max_size = size;
3602 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
3603 int pulled_hlen, u16 mac_offset,
3606 skb->protocol = protocol;
3607 skb->encapsulation = 1;
3608 skb_push(skb, pulled_hlen);
3609 skb_reset_transport_header(skb);
3610 skb->mac_header = mac_offset;
3611 skb->network_header = skb->mac_header + mac_len;
3612 skb->mac_len = mac_len;
3615 static inline bool netif_is_macvlan(struct net_device *dev)
3617 return dev->priv_flags & IFF_MACVLAN;
3620 static inline bool netif_is_bond_master(struct net_device *dev)
3622 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
3625 static inline bool netif_is_bond_slave(struct net_device *dev)
3627 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
3630 static inline bool netif_supports_nofcs(struct net_device *dev)
3632 return dev->priv_flags & IFF_SUPP_NOFCS;
3635 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
3636 static inline void netif_keep_dst(struct net_device *dev)
3638 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
3641 extern struct pernet_operations __net_initdata loopback_net_ops;
3643 /* Logging, debugging and troubleshooting/diagnostic helpers. */
3645 /* netdev_printk helpers, similar to dev_printk */
3647 static inline const char *netdev_name(const struct net_device *dev)
3649 if (!dev->name[0] || strchr(dev->name, '%'))
3650 return "(unnamed net_device)";
3654 static inline const char *netdev_reg_state(const struct net_device *dev)
3656 switch (dev->reg_state) {
3657 case NETREG_UNINITIALIZED: return " (uninitialized)";
3658 case NETREG_REGISTERED: return "";
3659 case NETREG_UNREGISTERING: return " (unregistering)";
3660 case NETREG_UNREGISTERED: return " (unregistered)";
3661 case NETREG_RELEASED: return " (released)";
3662 case NETREG_DUMMY: return " (dummy)";
3665 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
3666 return " (unknown)";
3670 void netdev_printk(const char *level, const struct net_device *dev,
3671 const char *format, ...);
3673 void netdev_emerg(const struct net_device *dev, const char *format, ...);
3675 void netdev_alert(const struct net_device *dev, const char *format, ...);
3677 void netdev_crit(const struct net_device *dev, const char *format, ...);
3679 void netdev_err(const struct net_device *dev, const char *format, ...);
3681 void netdev_warn(const struct net_device *dev, const char *format, ...);
3683 void netdev_notice(const struct net_device *dev, const char *format, ...);
3685 void netdev_info(const struct net_device *dev, const char *format, ...);
3687 #define MODULE_ALIAS_NETDEV(device) \
3688 MODULE_ALIAS("netdev-" device)
3690 #if defined(CONFIG_DYNAMIC_DEBUG)
3691 #define netdev_dbg(__dev, format, args...) \
3693 dynamic_netdev_dbg(__dev, format, ##args); \
3695 #elif defined(DEBUG)
3696 #define netdev_dbg(__dev, format, args...) \
3697 netdev_printk(KERN_DEBUG, __dev, format, ##args)
3699 #define netdev_dbg(__dev, format, args...) \
3702 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
3706 #if defined(VERBOSE_DEBUG)
3707 #define netdev_vdbg netdev_dbg
3710 #define netdev_vdbg(dev, format, args...) \
3713 netdev_printk(KERN_DEBUG, dev, format, ##args); \
3719 * netdev_WARN() acts like dev_printk(), but with the key difference
3720 * of using a WARN/WARN_ON to get the message out, including the
3721 * file/line information and a backtrace.
3723 #define netdev_WARN(dev, format, args...) \
3724 WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \
3725 netdev_reg_state(dev), ##args)
3727 /* netif printk helpers, similar to netdev_printk */
3729 #define netif_printk(priv, type, level, dev, fmt, args...) \
3731 if (netif_msg_##type(priv)) \
3732 netdev_printk(level, (dev), fmt, ##args); \
3735 #define netif_level(level, priv, type, dev, fmt, args...) \
3737 if (netif_msg_##type(priv)) \
3738 netdev_##level(dev, fmt, ##args); \
3741 #define netif_emerg(priv, type, dev, fmt, args...) \
3742 netif_level(emerg, priv, type, dev, fmt, ##args)
3743 #define netif_alert(priv, type, dev, fmt, args...) \
3744 netif_level(alert, priv, type, dev, fmt, ##args)
3745 #define netif_crit(priv, type, dev, fmt, args...) \
3746 netif_level(crit, priv, type, dev, fmt, ##args)
3747 #define netif_err(priv, type, dev, fmt, args...) \
3748 netif_level(err, priv, type, dev, fmt, ##args)
3749 #define netif_warn(priv, type, dev, fmt, args...) \
3750 netif_level(warn, priv, type, dev, fmt, ##args)
3751 #define netif_notice(priv, type, dev, fmt, args...) \
3752 netif_level(notice, priv, type, dev, fmt, ##args)
3753 #define netif_info(priv, type, dev, fmt, args...) \
3754 netif_level(info, priv, type, dev, fmt, ##args)
3756 #if defined(CONFIG_DYNAMIC_DEBUG)
3757 #define netif_dbg(priv, type, netdev, format, args...) \
3759 if (netif_msg_##type(priv)) \
3760 dynamic_netdev_dbg(netdev, format, ##args); \
3762 #elif defined(DEBUG)
3763 #define netif_dbg(priv, type, dev, format, args...) \
3764 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3766 #define netif_dbg(priv, type, dev, format, args...) \
3769 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3774 #if defined(VERBOSE_DEBUG)
3775 #define netif_vdbg netif_dbg
3777 #define netif_vdbg(priv, type, dev, format, args...) \
3780 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3786 * The list of packet types we will receive (as opposed to discard)
3787 * and the routines to invoke.
3789 * Why 16. Because with 16 the only overlap we get on a hash of the
3790 * low nibble of the protocol value is RARP/SNAP/X.25.
3792 * NOTE: That is no longer true with the addition of VLAN tags. Not
3793 * sure which should go first, but I bet it won't make much
3794 * difference if we are running VLANs. The good news is that
3795 * this protocol won't be in the list unless compiled in, so
3796 * the average user (w/out VLANs) will not be adversely affected.
3812 #define PTYPE_HASH_SIZE (16)
3813 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3815 #endif /* _LINUX_NETDEVICE_H */