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 <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 extern void netdev_set_default_ethtool_ops(struct net_device *dev,
64 const struct ethtool_ops *ops);
66 /* hardware address assignment types */
67 #define NET_ADDR_PERM 0 /* address is permanent (default) */
68 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
69 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
70 #define NET_ADDR_SET 3 /* address is set using
71 * dev_set_mac_address() */
73 /* Backlog congestion levels */
74 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
75 #define NET_RX_DROP 1 /* packet dropped */
78 * Transmit return codes: transmit return codes originate from three different
81 * - qdisc return codes
82 * - driver transmit return codes
85 * Drivers are allowed to return any one of those in their hard_start_xmit()
86 * function. Real network devices commonly used with qdiscs should only return
87 * the driver transmit return codes though - when qdiscs are used, the actual
88 * transmission happens asynchronously, so the value is not propagated to
89 * higher layers. Virtual network devices transmit synchronously, in this case
90 * the driver transmit return codes are consumed by dev_queue_xmit(), all
91 * others are propagated to higher layers.
94 /* qdisc ->enqueue() return codes. */
95 #define NET_XMIT_SUCCESS 0x00
96 #define NET_XMIT_DROP 0x01 /* skb dropped */
97 #define NET_XMIT_CN 0x02 /* congestion notification */
98 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
99 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
101 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
102 * indicates that the device will soon be dropping packets, or already drops
103 * some packets of the same priority; prompting us to send less aggressively. */
104 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
105 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107 /* Driver transmit return codes */
108 #define NETDEV_TX_MASK 0xf0
111 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
112 NETDEV_TX_OK = 0x00, /* driver took care of packet */
113 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
114 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
116 typedef enum netdev_tx netdev_tx_t;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc < NET_XMIT_MASK))
137 * Compute the worst case header length according to the protocols
141 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
148 # define LL_MAX_HEADER 32
151 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
152 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
153 #define MAX_HEADER LL_MAX_HEADER
155 #define MAX_HEADER (LL_MAX_HEADER + 48)
159 * Old network device statistics. Fields are native words
160 * (unsigned long) so they can be read and written atomically.
163 struct net_device_stats {
164 unsigned long rx_packets;
165 unsigned long tx_packets;
166 unsigned long rx_bytes;
167 unsigned long tx_bytes;
168 unsigned long rx_errors;
169 unsigned long tx_errors;
170 unsigned long rx_dropped;
171 unsigned long tx_dropped;
172 unsigned long multicast;
173 unsigned long collisions;
174 unsigned long rx_length_errors;
175 unsigned long rx_over_errors;
176 unsigned long rx_crc_errors;
177 unsigned long rx_frame_errors;
178 unsigned long rx_fifo_errors;
179 unsigned long rx_missed_errors;
180 unsigned long tx_aborted_errors;
181 unsigned long tx_carrier_errors;
182 unsigned long tx_fifo_errors;
183 unsigned long tx_heartbeat_errors;
184 unsigned long tx_window_errors;
185 unsigned long rx_compressed;
186 unsigned long tx_compressed;
190 #include <linux/cache.h>
191 #include <linux/skbuff.h>
194 #include <linux/static_key.h>
195 extern struct static_key rps_needed;
202 struct netdev_hw_addr {
203 struct list_head list;
204 unsigned char addr[MAX_ADDR_LEN];
206 #define NETDEV_HW_ADDR_T_LAN 1
207 #define NETDEV_HW_ADDR_T_SAN 2
208 #define NETDEV_HW_ADDR_T_SLAVE 3
209 #define NETDEV_HW_ADDR_T_UNICAST 4
210 #define NETDEV_HW_ADDR_T_MULTICAST 5
215 struct rcu_head rcu_head;
218 struct netdev_hw_addr_list {
219 struct list_head list;
223 #define netdev_hw_addr_list_count(l) ((l)->count)
224 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
225 #define netdev_hw_addr_list_for_each(ha, l) \
226 list_for_each_entry(ha, &(l)->list, list)
228 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
229 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
230 #define netdev_for_each_uc_addr(ha, dev) \
231 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
233 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
234 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
235 #define netdev_for_each_mc_addr(ha, dev) \
236 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 #define LL_RESERVED_SPACE(dev) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 int (*create) (struct sk_buff *skb, struct net_device *dev,
267 unsigned short type, const void *daddr,
268 const void *saddr, unsigned int len);
269 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
270 int (*rebuild)(struct sk_buff *skb);
271 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
272 void (*cache_update)(struct hh_cache *hh,
273 const struct net_device *dev,
274 const unsigned char *haddr);
277 /* These flag bits are private to the generic network queueing
278 * layer, they may not be explicitly referenced by any other
282 enum netdev_state_t {
284 __LINK_STATE_PRESENT,
285 __LINK_STATE_NOCARRIER,
286 __LINK_STATE_LINKWATCH_PENDING,
287 __LINK_STATE_DORMANT,
292 * This structure holds at boot time configured netdevice settings. They
293 * are then used in the device probing.
295 struct netdev_boot_setup {
299 #define NETDEV_BOOT_SETUP_MAX 8
301 extern int __init netdev_boot_setup(char *str);
304 * Structure for NAPI scheduling similar to tasklet but with weighting
307 /* The poll_list must only be managed by the entity which
308 * changes the state of the NAPI_STATE_SCHED bit. This means
309 * whoever atomically sets that bit can add this napi_struct
310 * to the per-cpu poll_list, and whoever clears that bit
311 * can remove from the list right before clearing the bit.
313 struct list_head poll_list;
317 unsigned int gro_count;
318 int (*poll)(struct napi_struct *, int);
319 #ifdef CONFIG_NETPOLL
320 spinlock_t poll_lock;
323 struct net_device *dev;
324 struct sk_buff *gro_list;
326 struct list_head dev_list;
330 NAPI_STATE_SCHED, /* Poll is scheduled */
331 NAPI_STATE_DISABLE, /* Disable pending */
332 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
342 typedef enum gro_result gro_result_t;
345 * enum rx_handler_result - Possible return values for rx_handlers.
346 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
348 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
349 * case skb->dev was changed by rx_handler.
350 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
351 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
353 * rx_handlers are functions called from inside __netif_receive_skb(), to do
354 * special processing of the skb, prior to delivery to protocol handlers.
356 * Currently, a net_device can only have a single rx_handler registered. Trying
357 * to register a second rx_handler will return -EBUSY.
359 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
360 * To unregister a rx_handler on a net_device, use
361 * netdev_rx_handler_unregister().
363 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
366 * If the rx_handler consumed to skb in some way, it should return
367 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
368 * the skb to be delivered in some other ways.
370 * If the rx_handler changed skb->dev, to divert the skb to another
371 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
372 * new device will be called if it exists.
374 * If the rx_handler consider the skb should be ignored, it should return
375 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
376 * are registered on exact device (ptype->dev == skb->dev).
378 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
379 * delivered, it should return RX_HANDLER_PASS.
381 * A device without a registered rx_handler will behave as if rx_handler
382 * returned RX_HANDLER_PASS.
385 enum rx_handler_result {
391 typedef enum rx_handler_result rx_handler_result_t;
392 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
394 extern void __napi_schedule(struct napi_struct *n);
396 static inline bool napi_disable_pending(struct napi_struct *n)
398 return test_bit(NAPI_STATE_DISABLE, &n->state);
402 * napi_schedule_prep - check if napi can be scheduled
405 * Test if NAPI routine is already running, and if not mark
406 * it as running. This is used as a condition variable
407 * insure only one NAPI poll instance runs. We also make
408 * sure there is no pending NAPI disable.
410 static inline bool napi_schedule_prep(struct napi_struct *n)
412 return !napi_disable_pending(n) &&
413 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
417 * napi_schedule - schedule NAPI poll
420 * Schedule NAPI poll routine to be called if it is not already
423 static inline void napi_schedule(struct napi_struct *n)
425 if (napi_schedule_prep(n))
429 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
430 static inline bool napi_reschedule(struct napi_struct *napi)
432 if (napi_schedule_prep(napi)) {
433 __napi_schedule(napi);
440 * napi_complete - NAPI processing complete
443 * Mark NAPI processing as complete.
445 extern void __napi_complete(struct napi_struct *n);
446 extern void napi_complete(struct napi_struct *n);
449 * napi_disable - prevent NAPI from scheduling
452 * Stop NAPI from being scheduled on this context.
453 * Waits till any outstanding processing completes.
455 static inline void napi_disable(struct napi_struct *n)
457 set_bit(NAPI_STATE_DISABLE, &n->state);
458 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
460 clear_bit(NAPI_STATE_DISABLE, &n->state);
464 * napi_enable - enable NAPI scheduling
467 * Resume NAPI from being scheduled on this context.
468 * Must be paired with napi_disable.
470 static inline void napi_enable(struct napi_struct *n)
472 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
473 smp_mb__before_clear_bit();
474 clear_bit(NAPI_STATE_SCHED, &n->state);
479 * napi_synchronize - wait until NAPI is not running
482 * Wait until NAPI is done being scheduled on this context.
483 * Waits till any outstanding processing completes but
484 * does not disable future activations.
486 static inline void napi_synchronize(const struct napi_struct *n)
488 while (test_bit(NAPI_STATE_SCHED, &n->state))
492 # define napi_synchronize(n) barrier()
495 enum netdev_queue_state_t {
496 __QUEUE_STATE_DRV_XOFF,
497 __QUEUE_STATE_STACK_XOFF,
498 __QUEUE_STATE_FROZEN,
499 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
500 (1 << __QUEUE_STATE_STACK_XOFF))
501 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
502 (1 << __QUEUE_STATE_FROZEN))
505 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
506 * netif_tx_* functions below are used to manipulate this flag. The
507 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
508 * queue independently. The netif_xmit_*stopped functions below are called
509 * to check if the queue has been stopped by the driver or stack (either
510 * of the XOFF bits are set in the state). Drivers should not need to call
511 * netif_xmit*stopped functions, they should only be using netif_tx_*.
514 struct netdev_queue {
518 struct net_device *dev;
520 struct Qdisc *qdisc_sleeping;
524 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
530 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
533 * please use this field instead of dev->trans_start
535 unsigned long trans_start;
538 * Number of TX timeouts for this queue
539 * (/sys/class/net/DEV/Q/trans_timeout)
541 unsigned long trans_timeout;
548 } ____cacheline_aligned_in_smp;
550 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
552 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
559 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
561 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
568 * This structure holds an RPS map which can be of variable length. The
569 * map is an array of CPUs.
576 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
579 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
580 * tail pointer for that CPU's input queue at the time of last enqueue, and
581 * a hardware filter index.
583 struct rps_dev_flow {
586 unsigned int last_qtail;
588 #define RPS_NO_FILTER 0xffff
591 * The rps_dev_flow_table structure contains a table of flow mappings.
593 struct rps_dev_flow_table {
596 struct rps_dev_flow flows[0];
598 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
599 ((_num) * sizeof(struct rps_dev_flow)))
602 * The rps_sock_flow_table contains mappings of flows to the last CPU
603 * on which they were processed by the application (set in recvmsg).
605 struct rps_sock_flow_table {
609 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
610 ((_num) * sizeof(u16)))
612 #define RPS_NO_CPU 0xffff
614 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
618 unsigned int cpu, index = hash & table->mask;
620 /* We only give a hint, preemption can change cpu under us */
621 cpu = raw_smp_processor_id();
623 if (table->ents[index] != cpu)
624 table->ents[index] = cpu;
628 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
632 table->ents[hash & table->mask] = RPS_NO_CPU;
635 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
637 #ifdef CONFIG_RFS_ACCEL
638 extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
639 u32 flow_id, u16 filter_id);
642 /* This structure contains an instance of an RX queue. */
643 struct netdev_rx_queue {
644 struct rps_map __rcu *rps_map;
645 struct rps_dev_flow_table __rcu *rps_flow_table;
647 struct net_device *dev;
648 } ____cacheline_aligned_in_smp;
649 #endif /* CONFIG_RPS */
653 * This structure holds an XPS map which can be of variable length. The
654 * map is an array of queues.
658 unsigned int alloc_len;
662 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
663 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
667 * This structure holds all XPS maps for device. Maps are indexed by CPU.
669 struct xps_dev_maps {
671 struct xps_map __rcu *cpu_map[0];
673 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
674 (nr_cpu_ids * sizeof(struct xps_map *)))
675 #endif /* CONFIG_XPS */
677 #define TC_MAX_QUEUE 16
678 #define TC_BITMASK 15
679 /* HW offloaded queuing disciplines txq count and offset maps */
680 struct netdev_tc_txq {
685 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
687 * This structure is to hold information about the device
688 * configured to run FCoE protocol stack.
690 struct netdev_fcoe_hbainfo {
691 char manufacturer[64];
692 char serial_number[64];
693 char hardware_version[64];
694 char driver_version[64];
695 char optionrom_version[64];
696 char firmware_version[64];
698 char model_description[256];
703 * This structure defines the management hooks for network devices.
704 * The following hooks can be defined; unless noted otherwise, they are
705 * optional and can be filled with a null pointer.
707 * int (*ndo_init)(struct net_device *dev);
708 * This function is called once when network device is registered.
709 * The network device can use this to any late stage initializaton
710 * or semantic validattion. It can fail with an error code which will
711 * be propogated back to register_netdev
713 * void (*ndo_uninit)(struct net_device *dev);
714 * This function is called when device is unregistered or when registration
715 * fails. It is not called if init fails.
717 * int (*ndo_open)(struct net_device *dev);
718 * This function is called when network device transistions to the up
721 * int (*ndo_stop)(struct net_device *dev);
722 * This function is called when network device transistions to the down
725 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
726 * struct net_device *dev);
727 * Called when a packet needs to be transmitted.
728 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
729 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
730 * Required can not be NULL.
732 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
733 * Called to decide which queue to when device supports multiple
736 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
737 * This function is called to allow device receiver to make
738 * changes to configuration when multicast or promiscious is enabled.
740 * void (*ndo_set_rx_mode)(struct net_device *dev);
741 * This function is called device changes address list filtering.
742 * If driver handles unicast address filtering, it should set
743 * IFF_UNICAST_FLT to its priv_flags.
745 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
746 * This function is called when the Media Access Control address
747 * needs to be changed. If this interface is not defined, the
748 * mac address can not be changed.
750 * int (*ndo_validate_addr)(struct net_device *dev);
751 * Test if Media Access Control address is valid for the device.
753 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
754 * Called when a user request an ioctl which can't be handled by
755 * the generic interface code. If not defined ioctl's return
756 * not supported error code.
758 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
759 * Used to set network devices bus interface parameters. This interface
760 * is retained for legacy reason, new devices should use the bus
761 * interface (PCI) for low level management.
763 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
764 * Called when a user wants to change the Maximum Transfer Unit
765 * of a device. If not defined, any request to change MTU will
766 * will return an error.
768 * void (*ndo_tx_timeout)(struct net_device *dev);
769 * Callback uses when the transmitter has not made any progress
770 * for dev->watchdog ticks.
772 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
773 * struct rtnl_link_stats64 *storage);
774 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
775 * Called when a user wants to get the network device usage
776 * statistics. Drivers must do one of the following:
777 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
778 * rtnl_link_stats64 structure passed by the caller.
779 * 2. Define @ndo_get_stats to update a net_device_stats structure
780 * (which should normally be dev->stats) and return a pointer to
781 * it. The structure may be changed asynchronously only if each
782 * field is written atomically.
783 * 3. Update dev->stats asynchronously and atomically, and define
786 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
787 * If device support VLAN filtering this function is called when a
788 * VLAN id is registered.
790 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
791 * If device support VLAN filtering this function is called when a
792 * VLAN id is unregistered.
794 * void (*ndo_poll_controller)(struct net_device *dev);
796 * SR-IOV management functions.
797 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
798 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
799 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
800 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
801 * int (*ndo_get_vf_config)(struct net_device *dev,
802 * int vf, struct ifla_vf_info *ivf);
803 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
804 * struct nlattr *port[]);
805 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
806 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
807 * Called to setup 'tc' number of traffic classes in the net device. This
808 * is always called from the stack with the rtnl lock held and netif tx
809 * queues stopped. This allows the netdevice to perform queue management
812 * Fiber Channel over Ethernet (FCoE) offload functions.
813 * int (*ndo_fcoe_enable)(struct net_device *dev);
814 * Called when the FCoE protocol stack wants to start using LLD for FCoE
815 * so the underlying device can perform whatever needed configuration or
816 * initialization to support acceleration of FCoE traffic.
818 * int (*ndo_fcoe_disable)(struct net_device *dev);
819 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
820 * so the underlying device can perform whatever needed clean-ups to
821 * stop supporting acceleration of FCoE traffic.
823 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
824 * struct scatterlist *sgl, unsigned int sgc);
825 * Called when the FCoE Initiator wants to initialize an I/O that
826 * is a possible candidate for Direct Data Placement (DDP). The LLD can
827 * perform necessary setup and returns 1 to indicate the device is set up
828 * successfully to perform DDP on this I/O, otherwise this returns 0.
830 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
831 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
832 * indicated by the FC exchange id 'xid', so the underlying device can
833 * clean up and reuse resources for later DDP requests.
835 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
836 * struct scatterlist *sgl, unsigned int sgc);
837 * Called when the FCoE Target wants to initialize an I/O that
838 * is a possible candidate for Direct Data Placement (DDP). The LLD can
839 * perform necessary setup and returns 1 to indicate the device is set up
840 * successfully to perform DDP on this I/O, otherwise this returns 0.
842 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
843 * struct netdev_fcoe_hbainfo *hbainfo);
844 * Called when the FCoE Protocol stack wants information on the underlying
845 * device. This information is utilized by the FCoE protocol stack to
846 * register attributes with Fiber Channel management service as per the
847 * FC-GS Fabric Device Management Information(FDMI) specification.
849 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
850 * Called when the underlying device wants to override default World Wide
851 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
852 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
853 * protocol stack to use.
856 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
857 * u16 rxq_index, u32 flow_id);
858 * Set hardware filter for RFS. rxq_index is the target queue index;
859 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
860 * Return the filter ID on success, or a negative error code.
862 * Slave management functions (for bridge, bonding, etc).
863 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
864 * Called to make another netdev an underling.
866 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
867 * Called to release previously enslaved netdev.
869 * Feature/offload setting functions.
870 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
871 * netdev_features_t features);
872 * Adjusts the requested feature flags according to device-specific
873 * constraints, and returns the resulting flags. Must not modify
876 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
877 * Called to update device configuration to new features. Passed
878 * feature set might be less than what was returned by ndo_fix_features()).
879 * Must return >0 or -errno if it changed dev->features itself.
881 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
882 * struct net_device *dev,
883 * const unsigned char *addr, u16 flags)
884 * Adds an FDB entry to dev for addr.
885 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
886 * struct net_device *dev,
887 * const unsigned char *addr)
888 * Deletes the FDB entry from dev coresponding to addr.
889 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
890 * struct net_device *dev, int idx)
891 * Used to add FDB entries to dump requests. Implementers should add
892 * entries to skb and update idx with the number of entries.
894 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
895 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
896 * struct net_device *dev, u32 filter_mask)
898 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
899 * Called to change device carrier. Soft-devices (like dummy, team, etc)
900 * which do not represent real hardware may define this to allow their
901 * userspace components to manage their virtual carrier state. Devices
902 * that determine carrier state from physical hardware properties (eg
903 * network cables) or protocol-dependent mechanisms (eg
904 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
906 struct net_device_ops {
907 int (*ndo_init)(struct net_device *dev);
908 void (*ndo_uninit)(struct net_device *dev);
909 int (*ndo_open)(struct net_device *dev);
910 int (*ndo_stop)(struct net_device *dev);
911 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
912 struct net_device *dev);
913 u16 (*ndo_select_queue)(struct net_device *dev,
914 struct sk_buff *skb);
915 void (*ndo_change_rx_flags)(struct net_device *dev,
917 void (*ndo_set_rx_mode)(struct net_device *dev);
918 int (*ndo_set_mac_address)(struct net_device *dev,
920 int (*ndo_validate_addr)(struct net_device *dev);
921 int (*ndo_do_ioctl)(struct net_device *dev,
922 struct ifreq *ifr, int cmd);
923 int (*ndo_set_config)(struct net_device *dev,
925 int (*ndo_change_mtu)(struct net_device *dev,
927 int (*ndo_neigh_setup)(struct net_device *dev,
928 struct neigh_parms *);
929 void (*ndo_tx_timeout) (struct net_device *dev);
931 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
932 struct rtnl_link_stats64 *storage);
933 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
935 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
936 __be16 proto, u16 vid);
937 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
938 __be16 proto, u16 vid);
939 #ifdef CONFIG_NET_POLL_CONTROLLER
940 void (*ndo_poll_controller)(struct net_device *dev);
941 int (*ndo_netpoll_setup)(struct net_device *dev,
942 struct netpoll_info *info,
944 void (*ndo_netpoll_cleanup)(struct net_device *dev);
946 int (*ndo_set_vf_mac)(struct net_device *dev,
948 int (*ndo_set_vf_vlan)(struct net_device *dev,
949 int queue, u16 vlan, u8 qos);
950 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
952 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
953 int vf, bool setting);
954 int (*ndo_get_vf_config)(struct net_device *dev,
956 struct ifla_vf_info *ivf);
957 int (*ndo_set_vf_port)(struct net_device *dev,
959 struct nlattr *port[]);
960 int (*ndo_get_vf_port)(struct net_device *dev,
961 int vf, struct sk_buff *skb);
962 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
963 #if IS_ENABLED(CONFIG_FCOE)
964 int (*ndo_fcoe_enable)(struct net_device *dev);
965 int (*ndo_fcoe_disable)(struct net_device *dev);
966 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
968 struct scatterlist *sgl,
970 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
972 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
974 struct scatterlist *sgl,
976 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
977 struct netdev_fcoe_hbainfo *hbainfo);
980 #if IS_ENABLED(CONFIG_LIBFCOE)
981 #define NETDEV_FCOE_WWNN 0
982 #define NETDEV_FCOE_WWPN 1
983 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
987 #ifdef CONFIG_RFS_ACCEL
988 int (*ndo_rx_flow_steer)(struct net_device *dev,
989 const struct sk_buff *skb,
993 int (*ndo_add_slave)(struct net_device *dev,
994 struct net_device *slave_dev);
995 int (*ndo_del_slave)(struct net_device *dev,
996 struct net_device *slave_dev);
997 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
998 netdev_features_t features);
999 int (*ndo_set_features)(struct net_device *dev,
1000 netdev_features_t features);
1001 int (*ndo_neigh_construct)(struct neighbour *n);
1002 void (*ndo_neigh_destroy)(struct neighbour *n);
1004 int (*ndo_fdb_add)(struct ndmsg *ndm,
1005 struct nlattr *tb[],
1006 struct net_device *dev,
1007 const unsigned char *addr,
1009 int (*ndo_fdb_del)(struct ndmsg *ndm,
1010 struct nlattr *tb[],
1011 struct net_device *dev,
1012 const unsigned char *addr);
1013 int (*ndo_fdb_dump)(struct sk_buff *skb,
1014 struct netlink_callback *cb,
1015 struct net_device *dev,
1018 int (*ndo_bridge_setlink)(struct net_device *dev,
1019 struct nlmsghdr *nlh);
1020 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1022 struct net_device *dev,
1024 int (*ndo_bridge_dellink)(struct net_device *dev,
1025 struct nlmsghdr *nlh);
1026 int (*ndo_change_carrier)(struct net_device *dev,
1031 * The DEVICE structure.
1032 * Actually, this whole structure is a big mistake. It mixes I/O
1033 * data with strictly "high-level" data, and it has to know about
1034 * almost every data structure used in the INET module.
1036 * FIXME: cleanup struct net_device such that network protocol info
1043 * This is the first field of the "visible" part of this structure
1044 * (i.e. as seen by users in the "Space.c" file). It is the name
1047 char name[IFNAMSIZ];
1049 /* device name hash chain, please keep it close to name[] */
1050 struct hlist_node name_hlist;
1056 * I/O specific fields
1057 * FIXME: Merge these and struct ifmap into one
1059 unsigned long mem_end; /* shared mem end */
1060 unsigned long mem_start; /* shared mem start */
1061 unsigned long base_addr; /* device I/O address */
1062 unsigned int irq; /* device IRQ number */
1065 * Some hardware also needs these fields, but they are not
1066 * part of the usual set specified in Space.c.
1069 unsigned long state;
1071 struct list_head dev_list;
1072 struct list_head napi_list;
1073 struct list_head unreg_list;
1074 struct list_head upper_dev_list; /* List of upper devices */
1077 /* currently active device features */
1078 netdev_features_t features;
1079 /* user-changeable features */
1080 netdev_features_t hw_features;
1081 /* user-requested features */
1082 netdev_features_t wanted_features;
1083 /* mask of features inheritable by VLAN devices */
1084 netdev_features_t vlan_features;
1085 /* mask of features inherited by encapsulating devices
1086 * This field indicates what encapsulation offloads
1087 * the hardware is capable of doing, and drivers will
1088 * need to set them appropriately.
1090 netdev_features_t hw_enc_features;
1091 /* mask of fetures inheritable by MPLS */
1092 netdev_features_t mpls_features;
1094 /* Interface index. Unique device identifier */
1098 struct net_device_stats stats;
1099 atomic_long_t rx_dropped; /* dropped packets by core network
1100 * Do not use this in drivers.
1103 #ifdef CONFIG_WIRELESS_EXT
1104 /* List of functions to handle Wireless Extensions (instead of ioctl).
1105 * See <net/iw_handler.h> for details. Jean II */
1106 const struct iw_handler_def * wireless_handlers;
1107 /* Instance data managed by the core of Wireless Extensions. */
1108 struct iw_public_data * wireless_data;
1110 /* Management operations */
1111 const struct net_device_ops *netdev_ops;
1112 const struct ethtool_ops *ethtool_ops;
1114 /* Hardware header description */
1115 const struct header_ops *header_ops;
1117 unsigned int flags; /* interface flags (a la BSD) */
1118 unsigned int priv_flags; /* Like 'flags' but invisible to userspace.
1119 * See if.h for definitions. */
1120 unsigned short gflags;
1121 unsigned short padded; /* How much padding added by alloc_netdev() */
1123 unsigned char operstate; /* RFC2863 operstate */
1124 unsigned char link_mode; /* mapping policy to operstate */
1126 unsigned char if_port; /* Selectable AUI, TP,..*/
1127 unsigned char dma; /* DMA channel */
1129 unsigned int mtu; /* interface MTU value */
1130 unsigned short type; /* interface hardware type */
1131 unsigned short hard_header_len; /* hardware hdr length */
1133 /* extra head- and tailroom the hardware may need, but not in all cases
1134 * can this be guaranteed, especially tailroom. Some cases also use
1135 * LL_MAX_HEADER instead to allocate the skb.
1137 unsigned short needed_headroom;
1138 unsigned short needed_tailroom;
1140 /* Interface address info. */
1141 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1142 unsigned char addr_assign_type; /* hw address assignment type */
1143 unsigned char addr_len; /* hardware address length */
1144 unsigned char neigh_priv_len;
1145 unsigned short dev_id; /* for shared network cards */
1147 spinlock_t addr_list_lock;
1148 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1149 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1150 struct netdev_hw_addr_list dev_addrs; /* list of device
1154 struct kset *queues_kset;
1158 unsigned int promiscuity;
1159 unsigned int allmulti;
1162 /* Protocol specific pointers */
1164 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1165 struct vlan_info __rcu *vlan_info; /* VLAN info */
1167 #if IS_ENABLED(CONFIG_NET_DSA)
1168 struct dsa_switch_tree *dsa_ptr; /* dsa specific data */
1170 void *atalk_ptr; /* AppleTalk link */
1171 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1172 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1173 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1174 void *ax25_ptr; /* AX.25 specific data */
1175 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1176 assign before registering */
1179 * Cache lines mostly used on receive path (including eth_type_trans())
1181 unsigned long last_rx; /* Time of last Rx
1182 * This should not be set in
1183 * drivers, unless really needed,
1184 * because network stack (bonding)
1185 * use it if/when necessary, to
1186 * avoid dirtying this cache line.
1189 /* Interface address info used in eth_type_trans() */
1190 unsigned char *dev_addr; /* hw address, (before bcast
1191 because most packets are
1196 struct netdev_rx_queue *_rx;
1198 /* Number of RX queues allocated at register_netdev() time */
1199 unsigned int num_rx_queues;
1201 /* Number of RX queues currently active in device */
1202 unsigned int real_num_rx_queues;
1206 rx_handler_func_t __rcu *rx_handler;
1207 void __rcu *rx_handler_data;
1209 struct netdev_queue __rcu *ingress_queue;
1210 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1214 * Cache lines mostly used on transmit path
1216 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1218 /* Number of TX queues allocated at alloc_netdev_mq() time */
1219 unsigned int num_tx_queues;
1221 /* Number of TX queues currently active in device */
1222 unsigned int real_num_tx_queues;
1224 /* root qdisc from userspace point of view */
1225 struct Qdisc *qdisc;
1227 unsigned long tx_queue_len; /* Max frames per queue allowed */
1228 spinlock_t tx_global_lock;
1231 struct xps_dev_maps __rcu *xps_maps;
1233 #ifdef CONFIG_RFS_ACCEL
1234 /* CPU reverse-mapping for RX completion interrupts, indexed
1235 * by RX queue number. Assigned by driver. This must only be
1236 * set if the ndo_rx_flow_steer operation is defined. */
1237 struct cpu_rmap *rx_cpu_rmap;
1240 /* These may be needed for future network-power-down code. */
1243 * trans_start here is expensive for high speed devices on SMP,
1244 * please use netdev_queue->trans_start instead.
1246 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1248 int watchdog_timeo; /* used by dev_watchdog() */
1249 struct timer_list watchdog_timer;
1251 /* Number of references to this device */
1252 int __percpu *pcpu_refcnt;
1254 /* delayed register/unregister */
1255 struct list_head todo_list;
1256 /* device index hash chain */
1257 struct hlist_node index_hlist;
1259 struct list_head link_watch_list;
1261 /* register/unregister state machine */
1262 enum { NETREG_UNINITIALIZED=0,
1263 NETREG_REGISTERED, /* completed register_netdevice */
1264 NETREG_UNREGISTERING, /* called unregister_netdevice */
1265 NETREG_UNREGISTERED, /* completed unregister todo */
1266 NETREG_RELEASED, /* called free_netdev */
1267 NETREG_DUMMY, /* dummy device for NAPI poll */
1270 bool dismantle; /* device is going do be freed */
1273 RTNL_LINK_INITIALIZED,
1274 RTNL_LINK_INITIALIZING,
1275 } rtnl_link_state:16;
1277 /* Called from unregister, can be used to call free_netdev */
1278 void (*destructor)(struct net_device *dev);
1280 #ifdef CONFIG_NETPOLL
1281 struct netpoll_info __rcu *npinfo;
1284 #ifdef CONFIG_NET_NS
1285 /* Network namespace this network device is inside */
1289 /* mid-layer private */
1292 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1293 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1294 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1295 struct pcpu_vstats __percpu *vstats; /* veth stats */
1298 struct garp_port __rcu *garp_port;
1300 struct mrp_port __rcu *mrp_port;
1302 /* class/net/name entry */
1304 /* space for optional device, statistics, and wireless sysfs groups */
1305 const struct attribute_group *sysfs_groups[4];
1307 /* rtnetlink link ops */
1308 const struct rtnl_link_ops *rtnl_link_ops;
1310 /* for setting kernel sock attribute on TCP connection setup */
1311 #define GSO_MAX_SIZE 65536
1312 unsigned int gso_max_size;
1313 #define GSO_MAX_SEGS 65535
1317 /* Data Center Bridging netlink ops */
1318 const struct dcbnl_rtnl_ops *dcbnl_ops;
1321 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1322 u8 prio_tc_map[TC_BITMASK + 1];
1324 #if IS_ENABLED(CONFIG_FCOE)
1325 /* max exchange id for FCoE LRO by ddp */
1326 unsigned int fcoe_ddp_xid;
1328 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1329 struct netprio_map __rcu *priomap;
1331 /* phy device may attach itself for hardware timestamping */
1332 struct phy_device *phydev;
1334 struct lock_class_key *qdisc_tx_busylock;
1336 /* group the device belongs to */
1339 struct pm_qos_request pm_qos_req;
1341 #define to_net_dev(d) container_of(d, struct net_device, dev)
1343 #define NETDEV_ALIGN 32
1346 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1348 return dev->prio_tc_map[prio & TC_BITMASK];
1352 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1354 if (tc >= dev->num_tc)
1357 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1362 void netdev_reset_tc(struct net_device *dev)
1365 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1366 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1370 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1372 if (tc >= dev->num_tc)
1375 dev->tc_to_txq[tc].count = count;
1376 dev->tc_to_txq[tc].offset = offset;
1381 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1383 if (num_tc > TC_MAX_QUEUE)
1386 dev->num_tc = num_tc;
1391 int netdev_get_num_tc(struct net_device *dev)
1397 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1400 return &dev->_tx[index];
1403 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1404 void (*f)(struct net_device *,
1405 struct netdev_queue *,
1411 for (i = 0; i < dev->num_tx_queues; i++)
1412 f(dev, &dev->_tx[i], arg);
1415 extern struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1416 struct sk_buff *skb);
1417 extern u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb);
1420 * Net namespace inlines
1423 struct net *dev_net(const struct net_device *dev)
1425 return read_pnet(&dev->nd_net);
1429 void dev_net_set(struct net_device *dev, struct net *net)
1431 #ifdef CONFIG_NET_NS
1432 release_net(dev->nd_net);
1433 dev->nd_net = hold_net(net);
1437 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1439 #ifdef CONFIG_NET_DSA_TAG_DSA
1440 if (dev->dsa_ptr != NULL)
1441 return dsa_uses_dsa_tags(dev->dsa_ptr);
1447 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1449 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1450 if (dev->dsa_ptr != NULL)
1451 return dsa_uses_trailer_tags(dev->dsa_ptr);
1458 * netdev_priv - access network device private data
1459 * @dev: network device
1461 * Get network device private data
1463 static inline void *netdev_priv(const struct net_device *dev)
1465 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1468 /* Set the sysfs physical device reference for the network logical device
1469 * if set prior to registration will cause a symlink during initialization.
1471 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1473 /* Set the sysfs device type for the network logical device to allow
1474 * fin grained indentification of different network device types. For
1475 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1477 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1479 /* Default NAPI poll() weight
1480 * Device drivers are strongly advised to not use bigger value
1482 #define NAPI_POLL_WEIGHT 64
1485 * netif_napi_add - initialize a napi context
1486 * @dev: network device
1487 * @napi: napi context
1488 * @poll: polling function
1489 * @weight: default weight
1491 * netif_napi_add() must be used to initialize a napi context prior to calling
1492 * *any* of the other napi related functions.
1494 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1495 int (*poll)(struct napi_struct *, int), int weight);
1498 * netif_napi_del - remove a napi context
1499 * @napi: napi context
1501 * netif_napi_del() removes a napi context from the network device napi list
1503 void netif_napi_del(struct napi_struct *napi);
1505 struct napi_gro_cb {
1506 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1509 /* Length of frag0. */
1510 unsigned int frag0_len;
1512 /* This indicates where we are processing relative to skb->data. */
1515 /* This is non-zero if the packet cannot be merged with the new skb. */
1518 /* Number of segments aggregated. */
1521 /* This is non-zero if the packet may be of the same flow. */
1526 #define NAPI_GRO_FREE 1
1527 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1529 /* jiffies when first packet was created/queued */
1532 /* Used in ipv6_gro_receive() */
1535 /* used in skb_gro_receive() slow path */
1536 struct sk_buff *last;
1539 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1541 struct packet_type {
1542 __be16 type; /* This is really htons(ether_type). */
1543 struct net_device *dev; /* NULL is wildcarded here */
1544 int (*func) (struct sk_buff *,
1545 struct net_device *,
1546 struct packet_type *,
1547 struct net_device *);
1548 bool (*id_match)(struct packet_type *ptype,
1550 void *af_packet_priv;
1551 struct list_head list;
1554 struct offload_callbacks {
1555 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1556 netdev_features_t features);
1557 int (*gso_send_check)(struct sk_buff *skb);
1558 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1559 struct sk_buff *skb);
1560 int (*gro_complete)(struct sk_buff *skb);
1563 struct packet_offload {
1564 __be16 type; /* This is really htons(ether_type). */
1565 struct offload_callbacks callbacks;
1566 struct list_head list;
1569 #include <linux/notifier.h>
1571 /* netdevice notifier chain. Please remember to update the rtnetlink
1572 * notification exclusion list in rtnetlink_event() when adding new
1575 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1576 #define NETDEV_DOWN 0x0002
1577 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1578 detected a hardware crash and restarted
1579 - we can use this eg to kick tcp sessions
1581 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1582 #define NETDEV_REGISTER 0x0005
1583 #define NETDEV_UNREGISTER 0x0006
1584 #define NETDEV_CHANGEMTU 0x0007
1585 #define NETDEV_CHANGEADDR 0x0008
1586 #define NETDEV_GOING_DOWN 0x0009
1587 #define NETDEV_CHANGENAME 0x000A
1588 #define NETDEV_FEAT_CHANGE 0x000B
1589 #define NETDEV_BONDING_FAILOVER 0x000C
1590 #define NETDEV_PRE_UP 0x000D
1591 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1592 #define NETDEV_POST_TYPE_CHANGE 0x000F
1593 #define NETDEV_POST_INIT 0x0010
1594 #define NETDEV_UNREGISTER_FINAL 0x0011
1595 #define NETDEV_RELEASE 0x0012
1596 #define NETDEV_NOTIFY_PEERS 0x0013
1597 #define NETDEV_JOIN 0x0014
1598 #define NETDEV_CHANGEUPPER 0x0015
1600 extern int register_netdevice_notifier(struct notifier_block *nb);
1601 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1603 struct netdev_notifier_info {
1604 struct net_device *dev;
1607 struct netdev_notifier_change_info {
1608 struct netdev_notifier_info info; /* must be first */
1609 unsigned int flags_changed;
1612 static inline struct net_device *
1613 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
1618 extern int call_netdevice_notifiers_info(unsigned long val, struct net_device *dev,
1619 struct netdev_notifier_info *info);
1620 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1623 extern rwlock_t dev_base_lock; /* Device list lock */
1625 extern seqcount_t devnet_rename_seq; /* Device rename seq */
1628 #define for_each_netdev(net, d) \
1629 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1630 #define for_each_netdev_reverse(net, d) \
1631 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1632 #define for_each_netdev_rcu(net, d) \
1633 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1634 #define for_each_netdev_safe(net, d, n) \
1635 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1636 #define for_each_netdev_continue(net, d) \
1637 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1638 #define for_each_netdev_continue_rcu(net, d) \
1639 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1640 #define for_each_netdev_in_bond_rcu(bond, slave) \
1641 for_each_netdev_rcu(&init_net, slave) \
1642 if (netdev_master_upper_dev_get_rcu(slave) == bond)
1643 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1645 static inline struct net_device *next_net_device(struct net_device *dev)
1647 struct list_head *lh;
1651 lh = dev->dev_list.next;
1652 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1655 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1657 struct list_head *lh;
1661 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1662 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1665 static inline struct net_device *first_net_device(struct net *net)
1667 return list_empty(&net->dev_base_head) ? NULL :
1668 net_device_entry(net->dev_base_head.next);
1671 static inline struct net_device *first_net_device_rcu(struct net *net)
1673 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1675 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1678 extern int netdev_boot_setup_check(struct net_device *dev);
1679 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1680 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1681 const char *hwaddr);
1682 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1683 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1684 extern void dev_add_pack(struct packet_type *pt);
1685 extern void dev_remove_pack(struct packet_type *pt);
1686 extern void __dev_remove_pack(struct packet_type *pt);
1687 extern void dev_add_offload(struct packet_offload *po);
1688 extern void dev_remove_offload(struct packet_offload *po);
1689 extern void __dev_remove_offload(struct packet_offload *po);
1691 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1692 unsigned short mask);
1693 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1694 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1695 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1696 extern int dev_alloc_name(struct net_device *dev, const char *name);
1697 extern int dev_open(struct net_device *dev);
1698 extern int dev_close(struct net_device *dev);
1699 extern void dev_disable_lro(struct net_device *dev);
1700 extern int dev_loopback_xmit(struct sk_buff *newskb);
1701 extern int dev_queue_xmit(struct sk_buff *skb);
1702 extern int register_netdevice(struct net_device *dev);
1703 extern void unregister_netdevice_queue(struct net_device *dev,
1704 struct list_head *head);
1705 extern void unregister_netdevice_many(struct list_head *head);
1706 static inline void unregister_netdevice(struct net_device *dev)
1708 unregister_netdevice_queue(dev, NULL);
1711 extern int netdev_refcnt_read(const struct net_device *dev);
1712 extern void free_netdev(struct net_device *dev);
1713 extern void synchronize_net(void);
1714 extern int init_dummy_netdev(struct net_device *dev);
1716 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1717 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1718 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1719 extern int dev_restart(struct net_device *dev);
1720 #ifdef CONFIG_NETPOLL_TRAP
1721 extern int netpoll_trap(void);
1723 extern int skb_gro_receive(struct sk_buff **head,
1724 struct sk_buff *skb);
1726 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1728 return NAPI_GRO_CB(skb)->data_offset;
1731 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1733 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1736 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1738 NAPI_GRO_CB(skb)->data_offset += len;
1741 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1742 unsigned int offset)
1744 return NAPI_GRO_CB(skb)->frag0 + offset;
1747 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1749 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1752 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1753 unsigned int offset)
1755 if (!pskb_may_pull(skb, hlen))
1758 NAPI_GRO_CB(skb)->frag0 = NULL;
1759 NAPI_GRO_CB(skb)->frag0_len = 0;
1760 return skb->data + offset;
1763 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1765 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1768 static inline void *skb_gro_network_header(struct sk_buff *skb)
1770 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1771 skb_network_offset(skb);
1774 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1775 unsigned short type,
1776 const void *daddr, const void *saddr,
1779 if (!dev->header_ops || !dev->header_ops->create)
1782 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1785 static inline int dev_parse_header(const struct sk_buff *skb,
1786 unsigned char *haddr)
1788 const struct net_device *dev = skb->dev;
1790 if (!dev->header_ops || !dev->header_ops->parse)
1792 return dev->header_ops->parse(skb, haddr);
1795 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1796 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1797 static inline int unregister_gifconf(unsigned int family)
1799 return register_gifconf(family, NULL);
1802 #ifdef CONFIG_NET_FLOW_LIMIT
1803 #define FLOW_LIMIT_HISTORY (1 << 8) /* must be ^2 */
1804 struct sd_flow_limit {
1806 unsigned int num_buckets;
1807 unsigned int history_head;
1808 u16 history[FLOW_LIMIT_HISTORY];
1812 extern int netdev_flow_limit_table_len;
1813 #endif /* CONFIG_NET_FLOW_LIMIT */
1816 * Incoming packets are placed on per-cpu queues
1818 struct softnet_data {
1819 struct Qdisc *output_queue;
1820 struct Qdisc **output_queue_tailp;
1821 struct list_head poll_list;
1822 struct sk_buff *completion_queue;
1823 struct sk_buff_head process_queue;
1826 unsigned int processed;
1827 unsigned int time_squeeze;
1828 unsigned int cpu_collision;
1829 unsigned int received_rps;
1832 struct softnet_data *rps_ipi_list;
1834 /* Elements below can be accessed between CPUs for RPS */
1835 struct call_single_data csd ____cacheline_aligned_in_smp;
1836 struct softnet_data *rps_ipi_next;
1838 unsigned int input_queue_head;
1839 unsigned int input_queue_tail;
1841 unsigned int dropped;
1842 struct sk_buff_head input_pkt_queue;
1843 struct napi_struct backlog;
1845 #ifdef CONFIG_NET_FLOW_LIMIT
1846 struct sd_flow_limit *flow_limit;
1850 static inline void input_queue_head_incr(struct softnet_data *sd)
1853 sd->input_queue_head++;
1857 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1858 unsigned int *qtail)
1861 *qtail = ++sd->input_queue_tail;
1865 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1867 extern void __netif_schedule(struct Qdisc *q);
1869 static inline void netif_schedule_queue(struct netdev_queue *txq)
1871 if (!(txq->state & QUEUE_STATE_ANY_XOFF))
1872 __netif_schedule(txq->qdisc);
1875 static inline void netif_tx_schedule_all(struct net_device *dev)
1879 for (i = 0; i < dev->num_tx_queues; i++)
1880 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1883 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1885 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1889 * netif_start_queue - allow transmit
1890 * @dev: network device
1892 * Allow upper layers to call the device hard_start_xmit routine.
1894 static inline void netif_start_queue(struct net_device *dev)
1896 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1899 static inline void netif_tx_start_all_queues(struct net_device *dev)
1903 for (i = 0; i < dev->num_tx_queues; i++) {
1904 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1905 netif_tx_start_queue(txq);
1909 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1911 #ifdef CONFIG_NETPOLL_TRAP
1912 if (netpoll_trap()) {
1913 netif_tx_start_queue(dev_queue);
1917 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
1918 __netif_schedule(dev_queue->qdisc);
1922 * netif_wake_queue - restart transmit
1923 * @dev: network device
1925 * Allow upper layers to call the device hard_start_xmit routine.
1926 * Used for flow control when transmit resources are available.
1928 static inline void netif_wake_queue(struct net_device *dev)
1930 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1933 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1937 for (i = 0; i < dev->num_tx_queues; i++) {
1938 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1939 netif_tx_wake_queue(txq);
1943 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1945 if (WARN_ON(!dev_queue)) {
1946 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1949 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1953 * netif_stop_queue - stop transmitted packets
1954 * @dev: network device
1956 * Stop upper layers calling the device hard_start_xmit routine.
1957 * Used for flow control when transmit resources are unavailable.
1959 static inline void netif_stop_queue(struct net_device *dev)
1961 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1964 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1968 for (i = 0; i < dev->num_tx_queues; i++) {
1969 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1970 netif_tx_stop_queue(txq);
1974 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1976 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1980 * netif_queue_stopped - test if transmit queue is flowblocked
1981 * @dev: network device
1983 * Test if transmit queue on device is currently unable to send.
1985 static inline bool netif_queue_stopped(const struct net_device *dev)
1987 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1990 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
1992 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
1995 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
1997 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
2000 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
2004 dql_queued(&dev_queue->dql, bytes);
2006 if (likely(dql_avail(&dev_queue->dql) >= 0))
2009 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2012 * The XOFF flag must be set before checking the dql_avail below,
2013 * because in netdev_tx_completed_queue we update the dql_completed
2014 * before checking the XOFF flag.
2018 /* check again in case another CPU has just made room avail */
2019 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
2020 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
2024 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
2026 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
2029 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2030 unsigned int pkts, unsigned int bytes)
2033 if (unlikely(!bytes))
2036 dql_completed(&dev_queue->dql, bytes);
2039 * Without the memory barrier there is a small possiblity that
2040 * netdev_tx_sent_queue will miss the update and cause the queue to
2041 * be stopped forever
2045 if (dql_avail(&dev_queue->dql) < 0)
2048 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
2049 netif_schedule_queue(dev_queue);
2053 static inline void netdev_completed_queue(struct net_device *dev,
2054 unsigned int pkts, unsigned int bytes)
2056 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
2059 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
2062 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
2067 static inline void netdev_reset_queue(struct net_device *dev_queue)
2069 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2073 * netif_running - test if up
2074 * @dev: network device
2076 * Test if the device has been brought up.
2078 static inline bool netif_running(const struct net_device *dev)
2080 return test_bit(__LINK_STATE_START, &dev->state);
2084 * Routines to manage the subqueues on a device. We only need start
2085 * stop, and a check if it's stopped. All other device management is
2086 * done at the overall netdevice level.
2087 * Also test the device if we're multiqueue.
2091 * netif_start_subqueue - allow sending packets on subqueue
2092 * @dev: network device
2093 * @queue_index: sub queue index
2095 * Start individual transmit queue of a device with multiple transmit queues.
2097 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
2099 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2101 netif_tx_start_queue(txq);
2105 * netif_stop_subqueue - stop sending packets on subqueue
2106 * @dev: network device
2107 * @queue_index: sub queue index
2109 * Stop individual transmit queue of a device with multiple transmit queues.
2111 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
2113 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2114 #ifdef CONFIG_NETPOLL_TRAP
2118 netif_tx_stop_queue(txq);
2122 * netif_subqueue_stopped - test status of subqueue
2123 * @dev: network device
2124 * @queue_index: sub queue index
2126 * Check individual transmit queue of a device with multiple transmit queues.
2128 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
2131 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2133 return netif_tx_queue_stopped(txq);
2136 static inline bool netif_subqueue_stopped(const struct net_device *dev,
2137 struct sk_buff *skb)
2139 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
2143 * netif_wake_subqueue - allow sending packets on subqueue
2144 * @dev: network device
2145 * @queue_index: sub queue index
2147 * Resume individual transmit queue of a device with multiple transmit queues.
2149 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
2151 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2152 #ifdef CONFIG_NETPOLL_TRAP
2156 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
2157 __netif_schedule(txq->qdisc);
2161 extern int netif_set_xps_queue(struct net_device *dev, struct cpumask *mask,
2164 static inline int netif_set_xps_queue(struct net_device *dev,
2165 struct cpumask *mask,
2173 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2174 * as a distribution range limit for the returned value.
2176 static inline u16 skb_tx_hash(const struct net_device *dev,
2177 const struct sk_buff *skb)
2179 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
2183 * netif_is_multiqueue - test if device has multiple transmit queues
2184 * @dev: network device
2186 * Check if device has multiple transmit queues
2188 static inline bool netif_is_multiqueue(const struct net_device *dev)
2190 return dev->num_tx_queues > 1;
2193 extern int netif_set_real_num_tx_queues(struct net_device *dev,
2197 extern int netif_set_real_num_rx_queues(struct net_device *dev,
2200 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2207 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
2208 const struct net_device *from_dev)
2212 err = netif_set_real_num_tx_queues(to_dev,
2213 from_dev->real_num_tx_queues);
2217 return netif_set_real_num_rx_queues(to_dev,
2218 from_dev->real_num_rx_queues);
2224 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2225 extern int netif_get_num_default_rss_queues(void);
2227 /* Use this variant when it is known for sure that it
2228 * is executing from hardware interrupt context or with hardware interrupts
2231 extern void dev_kfree_skb_irq(struct sk_buff *skb);
2233 /* Use this variant in places where it could be invoked
2234 * from either hardware interrupt or other context, with hardware interrupts
2235 * either disabled or enabled.
2237 extern void dev_kfree_skb_any(struct sk_buff *skb);
2239 extern int netif_rx(struct sk_buff *skb);
2240 extern int netif_rx_ni(struct sk_buff *skb);
2241 extern int netif_receive_skb(struct sk_buff *skb);
2242 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
2243 struct sk_buff *skb);
2244 extern void napi_gro_flush(struct napi_struct *napi, bool flush_old);
2245 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
2246 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
2248 static inline void napi_free_frags(struct napi_struct *napi)
2250 kfree_skb(napi->skb);
2254 extern int netdev_rx_handler_register(struct net_device *dev,
2255 rx_handler_func_t *rx_handler,
2256 void *rx_handler_data);
2257 extern void netdev_rx_handler_unregister(struct net_device *dev);
2259 extern bool dev_valid_name(const char *name);
2260 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2261 extern int dev_ethtool(struct net *net, struct ifreq *);
2262 extern unsigned int dev_get_flags(const struct net_device *);
2263 extern int __dev_change_flags(struct net_device *, unsigned int flags);
2264 extern int dev_change_flags(struct net_device *, unsigned int);
2265 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
2266 extern int dev_change_name(struct net_device *, const char *);
2267 extern int dev_set_alias(struct net_device *, const char *, size_t);
2268 extern int dev_change_net_namespace(struct net_device *,
2269 struct net *, const char *);
2270 extern int dev_set_mtu(struct net_device *, int);
2271 extern void dev_set_group(struct net_device *, int);
2272 extern int dev_set_mac_address(struct net_device *,
2274 extern int dev_change_carrier(struct net_device *,
2276 extern int dev_hard_start_xmit(struct sk_buff *skb,
2277 struct net_device *dev,
2278 struct netdev_queue *txq);
2279 extern int dev_forward_skb(struct net_device *dev,
2280 struct sk_buff *skb);
2282 extern int netdev_budget;
2284 /* Called by rtnetlink.c:rtnl_unlock() */
2285 extern void netdev_run_todo(void);
2288 * dev_put - release reference to device
2289 * @dev: network device
2291 * Release reference to device to allow it to be freed.
2293 static inline void dev_put(struct net_device *dev)
2295 this_cpu_dec(*dev->pcpu_refcnt);
2299 * dev_hold - get reference to device
2300 * @dev: network device
2302 * Hold reference to device to keep it from being freed.
2304 static inline void dev_hold(struct net_device *dev)
2306 this_cpu_inc(*dev->pcpu_refcnt);
2309 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2310 * and _off may be called from IRQ context, but it is caller
2311 * who is responsible for serialization of these calls.
2313 * The name carrier is inappropriate, these functions should really be
2314 * called netif_lowerlayer_*() because they represent the state of any
2315 * kind of lower layer not just hardware media.
2318 extern void linkwatch_init_dev(struct net_device *dev);
2319 extern void linkwatch_fire_event(struct net_device *dev);
2320 extern void linkwatch_forget_dev(struct net_device *dev);
2323 * netif_carrier_ok - test if carrier present
2324 * @dev: network device
2326 * Check if carrier is present on device
2328 static inline bool netif_carrier_ok(const struct net_device *dev)
2330 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2333 extern unsigned long dev_trans_start(struct net_device *dev);
2335 extern void __netdev_watchdog_up(struct net_device *dev);
2337 extern void netif_carrier_on(struct net_device *dev);
2339 extern void netif_carrier_off(struct net_device *dev);
2342 * netif_dormant_on - mark device as dormant.
2343 * @dev: network device
2345 * Mark device as dormant (as per RFC2863).
2347 * The dormant state indicates that the relevant interface is not
2348 * actually in a condition to pass packets (i.e., it is not 'up') but is
2349 * in a "pending" state, waiting for some external event. For "on-
2350 * demand" interfaces, this new state identifies the situation where the
2351 * interface is waiting for events to place it in the up state.
2354 static inline void netif_dormant_on(struct net_device *dev)
2356 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2357 linkwatch_fire_event(dev);
2361 * netif_dormant_off - set device as not dormant.
2362 * @dev: network device
2364 * Device is not in dormant state.
2366 static inline void netif_dormant_off(struct net_device *dev)
2368 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2369 linkwatch_fire_event(dev);
2373 * netif_dormant - test if carrier present
2374 * @dev: network device
2376 * Check if carrier is present on device
2378 static inline bool netif_dormant(const struct net_device *dev)
2380 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2385 * netif_oper_up - test if device is operational
2386 * @dev: network device
2388 * Check if carrier is operational
2390 static inline bool netif_oper_up(const struct net_device *dev)
2392 return (dev->operstate == IF_OPER_UP ||
2393 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2397 * netif_device_present - is device available or removed
2398 * @dev: network device
2400 * Check if device has not been removed from system.
2402 static inline bool netif_device_present(struct net_device *dev)
2404 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2407 extern void netif_device_detach(struct net_device *dev);
2409 extern void netif_device_attach(struct net_device *dev);
2412 * Network interface message level settings
2416 NETIF_MSG_DRV = 0x0001,
2417 NETIF_MSG_PROBE = 0x0002,
2418 NETIF_MSG_LINK = 0x0004,
2419 NETIF_MSG_TIMER = 0x0008,
2420 NETIF_MSG_IFDOWN = 0x0010,
2421 NETIF_MSG_IFUP = 0x0020,
2422 NETIF_MSG_RX_ERR = 0x0040,
2423 NETIF_MSG_TX_ERR = 0x0080,
2424 NETIF_MSG_TX_QUEUED = 0x0100,
2425 NETIF_MSG_INTR = 0x0200,
2426 NETIF_MSG_TX_DONE = 0x0400,
2427 NETIF_MSG_RX_STATUS = 0x0800,
2428 NETIF_MSG_PKTDATA = 0x1000,
2429 NETIF_MSG_HW = 0x2000,
2430 NETIF_MSG_WOL = 0x4000,
2433 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2434 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2435 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2436 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2437 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2438 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2439 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2440 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2441 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2442 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2443 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2444 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2445 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2446 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2447 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2449 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2452 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2453 return default_msg_enable_bits;
2454 if (debug_value == 0) /* no output */
2456 /* set low N bits */
2457 return (1 << debug_value) - 1;
2460 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2462 spin_lock(&txq->_xmit_lock);
2463 txq->xmit_lock_owner = cpu;
2466 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2468 spin_lock_bh(&txq->_xmit_lock);
2469 txq->xmit_lock_owner = smp_processor_id();
2472 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
2474 bool ok = spin_trylock(&txq->_xmit_lock);
2476 txq->xmit_lock_owner = smp_processor_id();
2480 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2482 txq->xmit_lock_owner = -1;
2483 spin_unlock(&txq->_xmit_lock);
2486 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2488 txq->xmit_lock_owner = -1;
2489 spin_unlock_bh(&txq->_xmit_lock);
2492 static inline void txq_trans_update(struct netdev_queue *txq)
2494 if (txq->xmit_lock_owner != -1)
2495 txq->trans_start = jiffies;
2499 * netif_tx_lock - grab network device transmit lock
2500 * @dev: network device
2502 * Get network device transmit lock
2504 static inline void netif_tx_lock(struct net_device *dev)
2509 spin_lock(&dev->tx_global_lock);
2510 cpu = smp_processor_id();
2511 for (i = 0; i < dev->num_tx_queues; i++) {
2512 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2514 /* We are the only thread of execution doing a
2515 * freeze, but we have to grab the _xmit_lock in
2516 * order to synchronize with threads which are in
2517 * the ->hard_start_xmit() handler and already
2518 * checked the frozen bit.
2520 __netif_tx_lock(txq, cpu);
2521 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2522 __netif_tx_unlock(txq);
2526 static inline void netif_tx_lock_bh(struct net_device *dev)
2532 static inline void netif_tx_unlock(struct net_device *dev)
2536 for (i = 0; i < dev->num_tx_queues; i++) {
2537 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2539 /* No need to grab the _xmit_lock here. If the
2540 * queue is not stopped for another reason, we
2543 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2544 netif_schedule_queue(txq);
2546 spin_unlock(&dev->tx_global_lock);
2549 static inline void netif_tx_unlock_bh(struct net_device *dev)
2551 netif_tx_unlock(dev);
2555 #define HARD_TX_LOCK(dev, txq, cpu) { \
2556 if ((dev->features & NETIF_F_LLTX) == 0) { \
2557 __netif_tx_lock(txq, cpu); \
2561 #define HARD_TX_UNLOCK(dev, txq) { \
2562 if ((dev->features & NETIF_F_LLTX) == 0) { \
2563 __netif_tx_unlock(txq); \
2567 static inline void netif_tx_disable(struct net_device *dev)
2573 cpu = smp_processor_id();
2574 for (i = 0; i < dev->num_tx_queues; i++) {
2575 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2577 __netif_tx_lock(txq, cpu);
2578 netif_tx_stop_queue(txq);
2579 __netif_tx_unlock(txq);
2584 static inline void netif_addr_lock(struct net_device *dev)
2586 spin_lock(&dev->addr_list_lock);
2589 static inline void netif_addr_lock_nested(struct net_device *dev)
2591 spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING);
2594 static inline void netif_addr_lock_bh(struct net_device *dev)
2596 spin_lock_bh(&dev->addr_list_lock);
2599 static inline void netif_addr_unlock(struct net_device *dev)
2601 spin_unlock(&dev->addr_list_lock);
2604 static inline void netif_addr_unlock_bh(struct net_device *dev)
2606 spin_unlock_bh(&dev->addr_list_lock);
2610 * dev_addrs walker. Should be used only for read access. Call with
2611 * rcu_read_lock held.
2613 #define for_each_dev_addr(dev, ha) \
2614 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2616 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2618 extern void ether_setup(struct net_device *dev);
2620 /* Support for loadable net-drivers */
2621 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2622 void (*setup)(struct net_device *),
2623 unsigned int txqs, unsigned int rxqs);
2624 #define alloc_netdev(sizeof_priv, name, setup) \
2625 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2627 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2628 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2630 extern int register_netdev(struct net_device *dev);
2631 extern void unregister_netdev(struct net_device *dev);
2633 /* General hardware address lists handling functions */
2634 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2635 struct netdev_hw_addr_list *from_list,
2636 int addr_len, unsigned char addr_type);
2637 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2638 struct netdev_hw_addr_list *from_list,
2639 int addr_len, unsigned char addr_type);
2640 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2641 struct netdev_hw_addr_list *from_list,
2643 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2644 struct netdev_hw_addr_list *from_list,
2646 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2647 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2649 /* Functions used for device addresses handling */
2650 extern int dev_addr_add(struct net_device *dev, const unsigned char *addr,
2651 unsigned char addr_type);
2652 extern int dev_addr_del(struct net_device *dev, const unsigned char *addr,
2653 unsigned char addr_type);
2654 extern int dev_addr_add_multiple(struct net_device *to_dev,
2655 struct net_device *from_dev,
2656 unsigned char addr_type);
2657 extern int dev_addr_del_multiple(struct net_device *to_dev,
2658 struct net_device *from_dev,
2659 unsigned char addr_type);
2660 extern void dev_addr_flush(struct net_device *dev);
2661 extern int dev_addr_init(struct net_device *dev);
2663 /* Functions used for unicast addresses handling */
2664 extern int dev_uc_add(struct net_device *dev, const unsigned char *addr);
2665 extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
2666 extern int dev_uc_del(struct net_device *dev, const unsigned char *addr);
2667 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2668 extern int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
2669 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2670 extern void dev_uc_flush(struct net_device *dev);
2671 extern void dev_uc_init(struct net_device *dev);
2673 /* Functions used for multicast addresses handling */
2674 extern int dev_mc_add(struct net_device *dev, const unsigned char *addr);
2675 extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
2676 extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
2677 extern int dev_mc_del(struct net_device *dev, const unsigned char *addr);
2678 extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
2679 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2680 extern int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
2681 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2682 extern void dev_mc_flush(struct net_device *dev);
2683 extern void dev_mc_init(struct net_device *dev);
2685 /* Functions used for secondary unicast and multicast support */
2686 extern void dev_set_rx_mode(struct net_device *dev);
2687 extern void __dev_set_rx_mode(struct net_device *dev);
2688 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2689 extern int dev_set_allmulti(struct net_device *dev, int inc);
2690 extern void netdev_state_change(struct net_device *dev);
2691 extern void netdev_notify_peers(struct net_device *dev);
2692 extern void netdev_features_change(struct net_device *dev);
2693 /* Load a device via the kmod */
2694 extern void dev_load(struct net *net, const char *name);
2695 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2696 struct rtnl_link_stats64 *storage);
2697 extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
2698 const struct net_device_stats *netdev_stats);
2700 extern int netdev_max_backlog;
2701 extern int netdev_tstamp_prequeue;
2702 extern int weight_p;
2703 extern int bpf_jit_enable;
2705 extern bool netdev_has_upper_dev(struct net_device *dev,
2706 struct net_device *upper_dev);
2707 extern bool netdev_has_any_upper_dev(struct net_device *dev);
2708 extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
2709 extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
2710 extern int netdev_upper_dev_link(struct net_device *dev,
2711 struct net_device *upper_dev);
2712 extern int netdev_master_upper_dev_link(struct net_device *dev,
2713 struct net_device *upper_dev);
2714 extern void netdev_upper_dev_unlink(struct net_device *dev,
2715 struct net_device *upper_dev);
2716 extern int skb_checksum_help(struct sk_buff *skb);
2717 extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
2718 netdev_features_t features, bool tx_path);
2719 extern struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
2720 netdev_features_t features);
2723 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
2725 return __skb_gso_segment(skb, features, true);
2727 __be16 skb_network_protocol(struct sk_buff *skb);
2729 static inline bool can_checksum_protocol(netdev_features_t features,
2732 return ((features & NETIF_F_GEN_CSUM) ||
2733 ((features & NETIF_F_V4_CSUM) &&
2734 protocol == htons(ETH_P_IP)) ||
2735 ((features & NETIF_F_V6_CSUM) &&
2736 protocol == htons(ETH_P_IPV6)) ||
2737 ((features & NETIF_F_FCOE_CRC) &&
2738 protocol == htons(ETH_P_FCOE)));
2742 extern void netdev_rx_csum_fault(struct net_device *dev);
2744 static inline void netdev_rx_csum_fault(struct net_device *dev)
2748 /* rx skb timestamps */
2749 extern void net_enable_timestamp(void);
2750 extern void net_disable_timestamp(void);
2752 #ifdef CONFIG_PROC_FS
2753 extern int __init dev_proc_init(void);
2755 #define dev_proc_init() 0
2758 extern int netdev_class_create_file(struct class_attribute *class_attr);
2759 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2761 extern struct kobj_ns_type_operations net_ns_type_operations;
2763 extern const char *netdev_drivername(const struct net_device *dev);
2765 extern void linkwatch_run_queue(void);
2767 static inline netdev_features_t netdev_get_wanted_features(
2768 struct net_device *dev)
2770 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2772 netdev_features_t netdev_increment_features(netdev_features_t all,
2773 netdev_features_t one, netdev_features_t mask);
2775 /* Allow TSO being used on stacked device :
2776 * Performing the GSO segmentation before last device
2777 * is a performance improvement.
2779 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
2780 netdev_features_t mask)
2782 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
2785 int __netdev_update_features(struct net_device *dev);
2786 void netdev_update_features(struct net_device *dev);
2787 void netdev_change_features(struct net_device *dev);
2789 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2790 struct net_device *dev);
2792 netdev_features_t netif_skb_features(struct sk_buff *skb);
2794 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
2796 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
2798 /* check flags correspondence */
2799 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
2800 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
2801 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
2802 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
2803 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
2804 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
2806 return (features & feature) == feature;
2809 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
2811 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2812 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2815 static inline bool netif_needs_gso(struct sk_buff *skb,
2816 netdev_features_t features)
2818 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2819 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
2820 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
2823 static inline void netif_set_gso_max_size(struct net_device *dev,
2826 dev->gso_max_size = size;
2829 static inline bool netif_is_bond_master(struct net_device *dev)
2831 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
2834 static inline bool netif_is_bond_slave(struct net_device *dev)
2836 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2839 static inline bool netif_supports_nofcs(struct net_device *dev)
2841 return dev->priv_flags & IFF_SUPP_NOFCS;
2844 extern struct pernet_operations __net_initdata loopback_net_ops;
2846 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2848 /* netdev_printk helpers, similar to dev_printk */
2850 static inline const char *netdev_name(const struct net_device *dev)
2852 if (dev->reg_state != NETREG_REGISTERED)
2853 return "(unregistered net_device)";
2857 extern __printf(3, 4)
2858 int netdev_printk(const char *level, const struct net_device *dev,
2859 const char *format, ...);
2860 extern __printf(2, 3)
2861 int netdev_emerg(const struct net_device *dev, const char *format, ...);
2862 extern __printf(2, 3)
2863 int netdev_alert(const struct net_device *dev, const char *format, ...);
2864 extern __printf(2, 3)
2865 int netdev_crit(const struct net_device *dev, const char *format, ...);
2866 extern __printf(2, 3)
2867 int netdev_err(const struct net_device *dev, const char *format, ...);
2868 extern __printf(2, 3)
2869 int netdev_warn(const struct net_device *dev, const char *format, ...);
2870 extern __printf(2, 3)
2871 int netdev_notice(const struct net_device *dev, const char *format, ...);
2872 extern __printf(2, 3)
2873 int netdev_info(const struct net_device *dev, const char *format, ...);
2875 #define MODULE_ALIAS_NETDEV(device) \
2876 MODULE_ALIAS("netdev-" device)
2878 #if defined(CONFIG_DYNAMIC_DEBUG)
2879 #define netdev_dbg(__dev, format, args...) \
2881 dynamic_netdev_dbg(__dev, format, ##args); \
2883 #elif defined(DEBUG)
2884 #define netdev_dbg(__dev, format, args...) \
2885 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2887 #define netdev_dbg(__dev, format, args...) \
2890 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2895 #if defined(VERBOSE_DEBUG)
2896 #define netdev_vdbg netdev_dbg
2899 #define netdev_vdbg(dev, format, args...) \
2902 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2908 * netdev_WARN() acts like dev_printk(), but with the key difference
2909 * of using a WARN/WARN_ON to get the message out, including the
2910 * file/line information and a backtrace.
2912 #define netdev_WARN(dev, format, args...) \
2913 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2915 /* netif printk helpers, similar to netdev_printk */
2917 #define netif_printk(priv, type, level, dev, fmt, args...) \
2919 if (netif_msg_##type(priv)) \
2920 netdev_printk(level, (dev), fmt, ##args); \
2923 #define netif_level(level, priv, type, dev, fmt, args...) \
2925 if (netif_msg_##type(priv)) \
2926 netdev_##level(dev, fmt, ##args); \
2929 #define netif_emerg(priv, type, dev, fmt, args...) \
2930 netif_level(emerg, priv, type, dev, fmt, ##args)
2931 #define netif_alert(priv, type, dev, fmt, args...) \
2932 netif_level(alert, priv, type, dev, fmt, ##args)
2933 #define netif_crit(priv, type, dev, fmt, args...) \
2934 netif_level(crit, priv, type, dev, fmt, ##args)
2935 #define netif_err(priv, type, dev, fmt, args...) \
2936 netif_level(err, priv, type, dev, fmt, ##args)
2937 #define netif_warn(priv, type, dev, fmt, args...) \
2938 netif_level(warn, priv, type, dev, fmt, ##args)
2939 #define netif_notice(priv, type, dev, fmt, args...) \
2940 netif_level(notice, priv, type, dev, fmt, ##args)
2941 #define netif_info(priv, type, dev, fmt, args...) \
2942 netif_level(info, priv, type, dev, fmt, ##args)
2944 #if defined(CONFIG_DYNAMIC_DEBUG)
2945 #define netif_dbg(priv, type, netdev, format, args...) \
2947 if (netif_msg_##type(priv)) \
2948 dynamic_netdev_dbg(netdev, format, ##args); \
2950 #elif defined(DEBUG)
2951 #define netif_dbg(priv, type, dev, format, args...) \
2952 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2954 #define netif_dbg(priv, type, dev, format, args...) \
2957 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2962 #if defined(VERBOSE_DEBUG)
2963 #define netif_vdbg netif_dbg
2965 #define netif_vdbg(priv, type, dev, format, args...) \
2968 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2974 * The list of packet types we will receive (as opposed to discard)
2975 * and the routines to invoke.
2977 * Why 16. Because with 16 the only overlap we get on a hash of the
2978 * low nibble of the protocol value is RARP/SNAP/X.25.
2980 * NOTE: That is no longer true with the addition of VLAN tags. Not
2981 * sure which should go first, but I bet it won't make much
2982 * difference if we are running VLANs. The good news is that
2983 * this protocol won't be in the list unless compiled in, so
2984 * the average user (w/out VLANs) will not be adversely affected.
3000 #define PTYPE_HASH_SIZE (16)
3001 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3003 #endif /* _LINUX_NETDEVICE_H */