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
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31 #include <linux/if_link.h>
34 #include <linux/pm_qos_params.h>
35 #include <linux/timer.h>
36 #include <linux/delay.h>
37 #include <asm/atomic.h>
38 #include <asm/cache.h>
39 #include <asm/byteorder.h>
41 #include <linux/device.h>
42 #include <linux/percpu.h>
43 #include <linux/rculist.h>
44 #include <linux/dmaengine.h>
45 #include <linux/workqueue.h>
47 #include <linux/ethtool.h>
48 #include <net/net_namespace.h>
51 #include <net/dcbnl.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 /* hardware address assignment types */
64 #define NET_ADDR_PERM 0 /* address is permanent (default) */
65 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
66 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
68 /* Backlog congestion levels */
69 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70 #define NET_RX_DROP 1 /* packet dropped */
73 * Transmit return codes: transmit return codes originate from three different
76 * - qdisc return codes
77 * - driver transmit return codes
80 * Drivers are allowed to return any one of those in their hard_start_xmit()
81 * function. Real network devices commonly used with qdiscs should only return
82 * the driver transmit return codes though - when qdiscs are used, the actual
83 * transmission happens asynchronously, so the value is not propagated to
84 * higher layers. Virtual network devices transmit synchronously, in this case
85 * the driver transmit return codes are consumed by dev_queue_xmit(), all
86 * others are propagated to higher layers.
89 /* qdisc ->enqueue() return codes. */
90 #define NET_XMIT_SUCCESS 0x00
91 #define NET_XMIT_DROP 0x01 /* skb dropped */
92 #define NET_XMIT_CN 0x02 /* congestion notification */
93 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
94 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
96 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
97 * indicates that the device will soon be dropping packets, or already drops
98 * some packets of the same priority; prompting us to send less aggressively. */
99 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
100 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
102 /* Driver transmit return codes */
103 #define NETDEV_TX_MASK 0xf0
106 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
107 NETDEV_TX_OK = 0x00, /* driver took care of packet */
108 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
109 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
111 typedef enum netdev_tx netdev_tx_t;
114 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
115 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
117 static inline bool dev_xmit_complete(int rc)
120 * Positive cases with an skb consumed by a driver:
121 * - successful transmission (rc == NETDEV_TX_OK)
122 * - error while transmitting (rc < 0)
123 * - error while queueing to a different device (rc & NET_XMIT_MASK)
125 if (likely(rc < NET_XMIT_MASK))
133 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
135 /* Initial net device group. All devices belong to group 0 by default. */
136 #define INIT_NETDEV_GROUP 0
140 * Compute the worst case header length according to the protocols
144 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
145 # if defined(CONFIG_MAC80211_MESH)
146 # define LL_MAX_HEADER 128
148 # define LL_MAX_HEADER 96
150 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
151 # define LL_MAX_HEADER 48
153 # define LL_MAX_HEADER 32
156 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
157 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
158 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
159 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
160 #define MAX_HEADER LL_MAX_HEADER
162 #define MAX_HEADER (LL_MAX_HEADER + 48)
166 * Old network device statistics. Fields are native words
167 * (unsigned long) so they can be read and written atomically.
170 struct net_device_stats {
171 unsigned long rx_packets;
172 unsigned long tx_packets;
173 unsigned long rx_bytes;
174 unsigned long tx_bytes;
175 unsigned long rx_errors;
176 unsigned long tx_errors;
177 unsigned long rx_dropped;
178 unsigned long tx_dropped;
179 unsigned long multicast;
180 unsigned long collisions;
181 unsigned long rx_length_errors;
182 unsigned long rx_over_errors;
183 unsigned long rx_crc_errors;
184 unsigned long rx_frame_errors;
185 unsigned long rx_fifo_errors;
186 unsigned long rx_missed_errors;
187 unsigned long tx_aborted_errors;
188 unsigned long tx_carrier_errors;
189 unsigned long tx_fifo_errors;
190 unsigned long tx_heartbeat_errors;
191 unsigned long tx_window_errors;
192 unsigned long rx_compressed;
193 unsigned long tx_compressed;
196 #endif /* __KERNEL__ */
199 /* Media selection options. */
212 #include <linux/cache.h>
213 #include <linux/skbuff.h>
219 struct netdev_hw_addr {
220 struct list_head list;
221 unsigned char addr[MAX_ADDR_LEN];
223 #define NETDEV_HW_ADDR_T_LAN 1
224 #define NETDEV_HW_ADDR_T_SAN 2
225 #define NETDEV_HW_ADDR_T_SLAVE 3
226 #define NETDEV_HW_ADDR_T_UNICAST 4
227 #define NETDEV_HW_ADDR_T_MULTICAST 5
231 struct rcu_head rcu_head;
234 struct netdev_hw_addr_list {
235 struct list_head list;
239 #define netdev_hw_addr_list_count(l) ((l)->count)
240 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
241 #define netdev_hw_addr_list_for_each(ha, l) \
242 list_for_each_entry(ha, &(l)->list, list)
244 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
245 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
246 #define netdev_for_each_uc_addr(ha, dev) \
247 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
249 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
250 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
251 #define netdev_for_each_mc_addr(ha, dev) \
252 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
259 /* cached hardware header; allow for machine alignment needs. */
260 #define HH_DATA_MOD 16
261 #define HH_DATA_OFF(__len) \
262 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
263 #define HH_DATA_ALIGN(__len) \
264 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
265 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
268 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
270 * dev->hard_header_len ? (dev->hard_header_len +
271 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
273 * We could use other alignment values, but we must maintain the
274 * relationship HH alignment <= LL alignment.
276 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
279 #define LL_RESERVED_SPACE(dev) \
280 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
281 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
282 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
283 #define LL_ALLOCATED_SPACE(dev) \
284 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
287 int (*create) (struct sk_buff *skb, struct net_device *dev,
288 unsigned short type, const void *daddr,
289 const void *saddr, unsigned len);
290 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
291 int (*rebuild)(struct sk_buff *skb);
292 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
293 void (*cache_update)(struct hh_cache *hh,
294 const struct net_device *dev,
295 const unsigned char *haddr);
298 /* These flag bits are private to the generic network queueing
299 * layer, they may not be explicitly referenced by any other
303 enum netdev_state_t {
305 __LINK_STATE_PRESENT,
306 __LINK_STATE_NOCARRIER,
307 __LINK_STATE_LINKWATCH_PENDING,
308 __LINK_STATE_DORMANT,
313 * This structure holds at boot time configured netdevice settings. They
314 * are then used in the device probing.
316 struct netdev_boot_setup {
320 #define NETDEV_BOOT_SETUP_MAX 8
322 extern int __init netdev_boot_setup(char *str);
325 * Structure for NAPI scheduling similar to tasklet but with weighting
328 /* The poll_list must only be managed by the entity which
329 * changes the state of the NAPI_STATE_SCHED bit. This means
330 * whoever atomically sets that bit can add this napi_struct
331 * to the per-cpu poll_list, and whoever clears that bit
332 * can remove from the list right before clearing the bit.
334 struct list_head poll_list;
338 int (*poll)(struct napi_struct *, int);
339 #ifdef CONFIG_NETPOLL
340 spinlock_t poll_lock;
344 unsigned int gro_count;
346 struct net_device *dev;
347 struct list_head dev_list;
348 struct sk_buff *gro_list;
353 NAPI_STATE_SCHED, /* Poll is scheduled */
354 NAPI_STATE_DISABLE, /* Disable pending */
355 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
365 typedef enum gro_result gro_result_t;
368 * enum rx_handler_result - Possible return values for rx_handlers.
369 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
371 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
372 * case skb->dev was changed by rx_handler.
373 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
374 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
376 * rx_handlers are functions called from inside __netif_receive_skb(), to do
377 * special processing of the skb, prior to delivery to protocol handlers.
379 * Currently, a net_device can only have a single rx_handler registered. Trying
380 * to register a second rx_handler will return -EBUSY.
382 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
383 * To unregister a rx_handler on a net_device, use
384 * netdev_rx_handler_unregister().
386 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
389 * If the rx_handler consumed to skb in some way, it should return
390 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
391 * the skb to be delivered in some other ways.
393 * If the rx_handler changed skb->dev, to divert the skb to another
394 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
395 * new device will be called if it exists.
397 * If the rx_handler consider the skb should be ignored, it should return
398 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
399 * are registred on exact device (ptype->dev == skb->dev).
401 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
402 * delivered, it should return RX_HANDLER_PASS.
404 * A device without a registered rx_handler will behave as if rx_handler
405 * returned RX_HANDLER_PASS.
408 enum rx_handler_result {
414 typedef enum rx_handler_result rx_handler_result_t;
415 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
417 extern void __napi_schedule(struct napi_struct *n);
419 static inline int napi_disable_pending(struct napi_struct *n)
421 return test_bit(NAPI_STATE_DISABLE, &n->state);
425 * napi_schedule_prep - check if napi can be scheduled
428 * Test if NAPI routine is already running, and if not mark
429 * it as running. This is used as a condition variable
430 * insure only one NAPI poll instance runs. We also make
431 * sure there is no pending NAPI disable.
433 static inline int napi_schedule_prep(struct napi_struct *n)
435 return !napi_disable_pending(n) &&
436 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
440 * napi_schedule - schedule NAPI poll
443 * Schedule NAPI poll routine to be called if it is not already
446 static inline void napi_schedule(struct napi_struct *n)
448 if (napi_schedule_prep(n))
452 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
453 static inline int napi_reschedule(struct napi_struct *napi)
455 if (napi_schedule_prep(napi)) {
456 __napi_schedule(napi);
463 * napi_complete - NAPI processing complete
466 * Mark NAPI processing as complete.
468 extern void __napi_complete(struct napi_struct *n);
469 extern void napi_complete(struct napi_struct *n);
472 * napi_disable - prevent NAPI from scheduling
475 * Stop NAPI from being scheduled on this context.
476 * Waits till any outstanding processing completes.
478 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_clear_bit();
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 {
520 __QUEUE_STATE_FROZEN,
521 #define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \
522 (1 << __QUEUE_STATE_FROZEN))
525 struct netdev_queue {
529 struct net_device *dev;
532 struct Qdisc *qdisc_sleeping;
536 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
542 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
545 * please use this field instead of dev->trans_start
547 unsigned long trans_start;
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 work_struct free_work;
597 struct rps_dev_flow flows[0];
599 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
600 (_num * sizeof(struct rps_dev_flow)))
603 * The rps_sock_flow_table contains mappings of flows to the last CPU
604 * on which they were processed by the application (set in recvmsg).
606 struct rps_sock_flow_table {
610 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
611 (_num * sizeof(u16)))
613 #define RPS_NO_CPU 0xffff
615 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
619 unsigned int cpu, index = hash & table->mask;
621 /* We only give a hint, preemption can change cpu under us */
622 cpu = raw_smp_processor_id();
624 if (table->ents[index] != cpu)
625 table->ents[index] = cpu;
629 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
633 table->ents[hash & table->mask] = RPS_NO_CPU;
636 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
638 #ifdef CONFIG_RFS_ACCEL
639 extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
640 u32 flow_id, u16 filter_id);
643 /* This structure contains an instance of an RX queue. */
644 struct netdev_rx_queue {
645 struct rps_map __rcu *rps_map;
646 struct rps_dev_flow_table __rcu *rps_flow_table;
648 struct net_device *dev;
649 } ____cacheline_aligned_in_smp;
650 #endif /* CONFIG_RPS */
654 * This structure holds an XPS map which can be of variable length. The
655 * map is an array of queues.
659 unsigned int alloc_len;
663 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
664 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
668 * This structure holds all XPS maps for device. Maps are indexed by CPU.
670 struct xps_dev_maps {
672 struct xps_map __rcu *cpu_map[0];
674 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
675 (nr_cpu_ids * sizeof(struct xps_map *)))
676 #endif /* CONFIG_XPS */
678 #define TC_MAX_QUEUE 16
679 #define TC_BITMASK 15
680 /* HW offloaded queuing disciplines txq count and offset maps */
681 struct netdev_tc_txq {
687 * This structure defines the management hooks for network devices.
688 * The following hooks can be defined; unless noted otherwise, they are
689 * optional and can be filled with a null pointer.
691 * int (*ndo_init)(struct net_device *dev);
692 * This function is called once when network device is registered.
693 * The network device can use this to any late stage initializaton
694 * or semantic validattion. It can fail with an error code which will
695 * be propogated back to register_netdev
697 * void (*ndo_uninit)(struct net_device *dev);
698 * This function is called when device is unregistered or when registration
699 * fails. It is not called if init fails.
701 * int (*ndo_open)(struct net_device *dev);
702 * This function is called when network device transistions to the up
705 * int (*ndo_stop)(struct net_device *dev);
706 * This function is called when network device transistions to the down
709 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
710 * struct net_device *dev);
711 * Called when a packet needs to be transmitted.
712 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
713 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
714 * Required can not be NULL.
716 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
717 * Called to decide which queue to when device supports multiple
720 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
721 * This function is called to allow device receiver to make
722 * changes to configuration when multicast or promiscious is enabled.
724 * void (*ndo_set_rx_mode)(struct net_device *dev);
725 * This function is called device changes address list filtering.
727 * void (*ndo_set_multicast_list)(struct net_device *dev);
728 * This function is called when the multicast address list changes.
730 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
731 * This function is called when the Media Access Control address
732 * needs to be changed. If this interface is not defined, the
733 * mac address can not be changed.
735 * int (*ndo_validate_addr)(struct net_device *dev);
736 * Test if Media Access Control address is valid for the device.
738 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
739 * Called when a user request an ioctl which can't be handled by
740 * the generic interface code. If not defined ioctl's return
741 * not supported error code.
743 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
744 * Used to set network devices bus interface parameters. This interface
745 * is retained for legacy reason, new devices should use the bus
746 * interface (PCI) for low level management.
748 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
749 * Called when a user wants to change the Maximum Transfer Unit
750 * of a device. If not defined, any request to change MTU will
751 * will return an error.
753 * void (*ndo_tx_timeout)(struct net_device *dev);
754 * Callback uses when the transmitter has not made any progress
755 * for dev->watchdog ticks.
757 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
758 * struct rtnl_link_stats64 *storage);
759 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
760 * Called when a user wants to get the network device usage
761 * statistics. Drivers must do one of the following:
762 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
763 * rtnl_link_stats64 structure passed by the caller.
764 * 2. Define @ndo_get_stats to update a net_device_stats structure
765 * (which should normally be dev->stats) and return a pointer to
766 * it. The structure may be changed asynchronously only if each
767 * field is written atomically.
768 * 3. Update dev->stats asynchronously and atomically, and define
771 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
772 * If device support VLAN receive acceleration
773 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
774 * when vlan groups for the device changes. Note: grp is NULL
775 * if no vlan's groups are being used.
777 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
778 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
779 * this function is called when a VLAN id is registered.
781 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
782 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
783 * this function is called when a VLAN id is unregistered.
785 * void (*ndo_poll_controller)(struct net_device *dev);
787 * SR-IOV management functions.
788 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
789 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
790 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
791 * int (*ndo_get_vf_config)(struct net_device *dev,
792 * int vf, struct ifla_vf_info *ivf);
793 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
794 * struct nlattr *port[]);
795 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
796 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
797 * Called to setup 'tc' number of traffic classes in the net device. This
798 * is always called from the stack with the rtnl lock held and netif tx
799 * queues stopped. This allows the netdevice to perform queue management
802 * Fiber Channel over Ethernet (FCoE) offload functions.
803 * int (*ndo_fcoe_enable)(struct net_device *dev);
804 * Called when the FCoE protocol stack wants to start using LLD for FCoE
805 * so the underlying device can perform whatever needed configuration or
806 * initialization to support acceleration of FCoE traffic.
808 * int (*ndo_fcoe_disable)(struct net_device *dev);
809 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
810 * so the underlying device can perform whatever needed clean-ups to
811 * stop supporting acceleration of FCoE traffic.
813 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
814 * struct scatterlist *sgl, unsigned int sgc);
815 * Called when the FCoE Initiator wants to initialize an I/O that
816 * is a possible candidate for Direct Data Placement (DDP). The LLD can
817 * perform necessary setup and returns 1 to indicate the device is set up
818 * successfully to perform DDP on this I/O, otherwise this returns 0.
820 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
821 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
822 * indicated by the FC exchange id 'xid', so the underlying device can
823 * clean up and reuse resources for later DDP requests.
825 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
826 * struct scatterlist *sgl, unsigned int sgc);
827 * Called when the FCoE Target wants to initialize an I/O that
828 * is a possible candidate for Direct Data Placement (DDP). The LLD can
829 * perform necessary setup and returns 1 to indicate the device is set up
830 * successfully to perform DDP on this I/O, otherwise this returns 0.
832 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
833 * Called when the underlying device wants to override default World Wide
834 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
835 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
836 * protocol stack to use.
839 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
840 * u16 rxq_index, u32 flow_id);
841 * Set hardware filter for RFS. rxq_index is the target queue index;
842 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
843 * Return the filter ID on success, or a negative error code.
845 * Slave management functions (for bridge, bonding, etc). User should
846 * call netdev_set_master() to set dev->master properly.
847 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
848 * Called to make another netdev an underling.
850 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
851 * Called to release previously enslaved netdev.
853 * Feature/offload setting functions.
854 * u32 (*ndo_fix_features)(struct net_device *dev, u32 features);
855 * Adjusts the requested feature flags according to device-specific
856 * constraints, and returns the resulting flags. Must not modify
859 * int (*ndo_set_features)(struct net_device *dev, u32 features);
860 * Called to update device configuration to new features. Passed
861 * feature set might be less than what was returned by ndo_fix_features()).
862 * Must return >0 or -errno if it changed dev->features itself.
865 struct net_device_ops {
866 int (*ndo_init)(struct net_device *dev);
867 void (*ndo_uninit)(struct net_device *dev);
868 int (*ndo_open)(struct net_device *dev);
869 int (*ndo_stop)(struct net_device *dev);
870 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
871 struct net_device *dev);
872 u16 (*ndo_select_queue)(struct net_device *dev,
873 struct sk_buff *skb);
874 void (*ndo_change_rx_flags)(struct net_device *dev,
876 void (*ndo_set_rx_mode)(struct net_device *dev);
877 void (*ndo_set_multicast_list)(struct net_device *dev);
878 int (*ndo_set_mac_address)(struct net_device *dev,
880 int (*ndo_validate_addr)(struct net_device *dev);
881 int (*ndo_do_ioctl)(struct net_device *dev,
882 struct ifreq *ifr, int cmd);
883 int (*ndo_set_config)(struct net_device *dev,
885 int (*ndo_change_mtu)(struct net_device *dev,
887 int (*ndo_neigh_setup)(struct net_device *dev,
888 struct neigh_parms *);
889 void (*ndo_tx_timeout) (struct net_device *dev);
891 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
892 struct rtnl_link_stats64 *storage);
893 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
895 void (*ndo_vlan_rx_register)(struct net_device *dev,
896 struct vlan_group *grp);
897 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
899 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
901 #ifdef CONFIG_NET_POLL_CONTROLLER
902 void (*ndo_poll_controller)(struct net_device *dev);
903 int (*ndo_netpoll_setup)(struct net_device *dev,
904 struct netpoll_info *info);
905 void (*ndo_netpoll_cleanup)(struct net_device *dev);
907 int (*ndo_set_vf_mac)(struct net_device *dev,
909 int (*ndo_set_vf_vlan)(struct net_device *dev,
910 int queue, u16 vlan, u8 qos);
911 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
913 int (*ndo_get_vf_config)(struct net_device *dev,
915 struct ifla_vf_info *ivf);
916 int (*ndo_set_vf_port)(struct net_device *dev,
918 struct nlattr *port[]);
919 int (*ndo_get_vf_port)(struct net_device *dev,
920 int vf, struct sk_buff *skb);
921 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
922 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
923 int (*ndo_fcoe_enable)(struct net_device *dev);
924 int (*ndo_fcoe_disable)(struct net_device *dev);
925 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
927 struct scatterlist *sgl,
929 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
931 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
933 struct scatterlist *sgl,
935 #define NETDEV_FCOE_WWNN 0
936 #define NETDEV_FCOE_WWPN 1
937 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
940 #ifdef CONFIG_RFS_ACCEL
941 int (*ndo_rx_flow_steer)(struct net_device *dev,
942 const struct sk_buff *skb,
946 int (*ndo_add_slave)(struct net_device *dev,
947 struct net_device *slave_dev);
948 int (*ndo_del_slave)(struct net_device *dev,
949 struct net_device *slave_dev);
950 u32 (*ndo_fix_features)(struct net_device *dev,
952 int (*ndo_set_features)(struct net_device *dev,
957 * The DEVICE structure.
958 * Actually, this whole structure is a big mistake. It mixes I/O
959 * data with strictly "high-level" data, and it has to know about
960 * almost every data structure used in the INET module.
962 * FIXME: cleanup struct net_device such that network protocol info
969 * This is the first field of the "visible" part of this structure
970 * (i.e. as seen by users in the "Space.c" file). It is the name
975 struct pm_qos_request_list pm_qos_req;
977 /* device name hash chain */
978 struct hlist_node name_hlist;
983 * I/O specific fields
984 * FIXME: Merge these and struct ifmap into one
986 unsigned long mem_end; /* shared mem end */
987 unsigned long mem_start; /* shared mem start */
988 unsigned long base_addr; /* device I/O address */
989 unsigned int irq; /* device IRQ number */
992 * Some hardware also needs these fields, but they are not
993 * part of the usual set specified in Space.c.
998 struct list_head dev_list;
999 struct list_head napi_list;
1000 struct list_head unreg_list;
1002 /* currently active device features */
1004 /* user-changeable features */
1006 /* user-requested features */
1007 u32 wanted_features;
1008 /* mask of features inheritable by VLAN devices */
1011 /* Net device feature bits; if you change something,
1012 * also update netdev_features_strings[] in ethtool.c */
1014 #define NETIF_F_SG 1 /* Scatter/gather IO. */
1015 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
1016 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
1017 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
1018 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
1019 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
1020 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
1021 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
1022 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
1023 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
1024 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
1025 #define NETIF_F_GSO 2048 /* Enable software GSO. */
1026 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
1027 /* do not use LLTX in new drivers */
1028 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
1029 #define NETIF_F_GRO 16384 /* Generic receive offload */
1030 #define NETIF_F_LRO 32768 /* large receive offload */
1032 /* the GSO_MASK reserves bits 16 through 23 */
1033 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
1034 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
1035 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
1036 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
1037 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
1038 #define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
1039 #define NETIF_F_NOCACHE_COPY (1 << 30) /* Use no-cache copyfromuser */
1040 #define NETIF_F_LOOPBACK (1 << 31) /* Enable loopback */
1042 /* Segmentation offload features */
1043 #define NETIF_F_GSO_SHIFT 16
1044 #define NETIF_F_GSO_MASK 0x00ff0000
1045 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
1046 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
1047 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
1048 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
1049 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
1050 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
1052 /* Features valid for ethtool to change */
1053 /* = all defined minus driver/device-class-related */
1054 #define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
1055 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
1056 #define NETIF_F_ETHTOOL_BITS (0xff3fffff & ~NETIF_F_NEVER_CHANGE)
1058 /* List of features with software fallbacks. */
1059 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
1060 NETIF_F_TSO6 | NETIF_F_UFO)
1063 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
1064 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
1065 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
1066 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
1068 #define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
1070 #define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
1073 #define NETIF_F_ALL_TX_OFFLOADS (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1074 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1076 NETIF_F_SCTP_CSUM | \
1080 * If one device supports one of these features, then enable them
1081 * for all in netdev_increment_features.
1083 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
1084 NETIF_F_SG | NETIF_F_HIGHDMA | \
1085 NETIF_F_FRAGLIST | NETIF_F_VLAN_CHALLENGED)
1087 * If one device doesn't support one of these features, then disable it
1088 * for all in netdev_increment_features.
1090 #define NETIF_F_ALL_FOR_ALL (NETIF_F_NOCACHE_COPY | NETIF_F_FSO)
1092 /* changeable features with no special hardware requirements */
1093 #define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
1095 /* Interface index. Unique device identifier */
1099 struct net_device_stats stats;
1100 atomic_long_t rx_dropped; /* dropped packets by core network
1101 * Do not use this in drivers.
1104 #ifdef CONFIG_WIRELESS_EXT
1105 /* List of functions to handle Wireless Extensions (instead of ioctl).
1106 * See <net/iw_handler.h> for details. Jean II */
1107 const struct iw_handler_def * wireless_handlers;
1108 /* Instance data managed by the core of Wireless Extensions. */
1109 struct iw_public_data * wireless_data;
1111 /* Management operations */
1112 const struct net_device_ops *netdev_ops;
1113 const struct ethtool_ops *ethtool_ops;
1115 /* Hardware header description */
1116 const struct header_ops *header_ops;
1118 unsigned int flags; /* interface flags (a la BSD) */
1119 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
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 short dev_id; /* for shared network cards */
1146 spinlock_t addr_list_lock;
1147 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1148 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1150 unsigned int promiscuity;
1151 unsigned int allmulti;
1154 /* Protocol specific pointers */
1156 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1157 struct vlan_group __rcu *vlgrp; /* VLAN group */
1159 #ifdef CONFIG_NET_DSA
1160 void *dsa_ptr; /* dsa specific data */
1162 void *atalk_ptr; /* AppleTalk link */
1163 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1164 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1165 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1166 void *ec_ptr; /* Econet specific data */
1167 void *ax25_ptr; /* AX.25 specific data */
1168 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1169 assign before registering */
1172 * Cache lines mostly used on receive path (including eth_type_trans())
1174 unsigned long last_rx; /* Time of last Rx
1175 * This should not be set in
1176 * drivers, unless really needed,
1177 * because network stack (bonding)
1178 * use it if/when necessary, to
1179 * avoid dirtying this cache line.
1182 struct net_device *master; /* Pointer to master device of a group,
1183 * which this device is member of.
1186 /* Interface address info used in eth_type_trans() */
1187 unsigned char *dev_addr; /* hw address, (before bcast
1188 because most packets are
1191 struct netdev_hw_addr_list dev_addrs; /* list of device
1194 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1197 struct kset *queues_kset;
1199 struct netdev_rx_queue *_rx;
1201 /* Number of RX queues allocated at register_netdev() time */
1202 unsigned int num_rx_queues;
1204 /* Number of RX queues currently active in device */
1205 unsigned int real_num_rx_queues;
1207 #ifdef CONFIG_RFS_ACCEL
1208 /* CPU reverse-mapping for RX completion interrupts, indexed
1209 * by RX queue number. Assigned by driver. This must only be
1210 * set if the ndo_rx_flow_steer operation is defined. */
1211 struct cpu_rmap *rx_cpu_rmap;
1215 rx_handler_func_t __rcu *rx_handler;
1216 void __rcu *rx_handler_data;
1218 struct netdev_queue __rcu *ingress_queue;
1221 * Cache lines mostly used on transmit path
1223 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1225 /* Number of TX queues allocated at alloc_netdev_mq() time */
1226 unsigned int num_tx_queues;
1228 /* Number of TX queues currently active in device */
1229 unsigned int real_num_tx_queues;
1231 /* root qdisc from userspace point of view */
1232 struct Qdisc *qdisc;
1234 unsigned long tx_queue_len; /* Max frames per queue allowed */
1235 spinlock_t tx_global_lock;
1238 struct xps_dev_maps __rcu *xps_maps;
1241 /* These may be needed for future network-power-down code. */
1244 * trans_start here is expensive for high speed devices on SMP,
1245 * please use netdev_queue->trans_start instead.
1247 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1249 int watchdog_timeo; /* used by dev_watchdog() */
1250 struct timer_list watchdog_timer;
1252 /* Number of references to this device */
1253 int __percpu *pcpu_refcnt;
1255 /* delayed register/unregister */
1256 struct list_head todo_list;
1257 /* device index hash chain */
1258 struct hlist_node index_hlist;
1260 struct list_head link_watch_list;
1262 /* register/unregister state machine */
1263 enum { NETREG_UNINITIALIZED=0,
1264 NETREG_REGISTERED, /* completed register_netdevice */
1265 NETREG_UNREGISTERING, /* called unregister_netdevice */
1266 NETREG_UNREGISTERED, /* completed unregister todo */
1267 NETREG_RELEASED, /* called free_netdev */
1268 NETREG_DUMMY, /* dummy device for NAPI poll */
1271 bool dismantle; /* device is going do be freed */
1274 RTNL_LINK_INITIALIZED,
1275 RTNL_LINK_INITIALIZING,
1276 } rtnl_link_state:16;
1278 /* Called from unregister, can be used to call free_netdev */
1279 void (*destructor)(struct net_device *dev);
1281 #ifdef CONFIG_NETPOLL
1282 struct netpoll_info *npinfo;
1285 #ifdef CONFIG_NET_NS
1286 /* Network namespace this network device is inside */
1290 /* mid-layer private */
1293 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1294 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1295 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1298 struct garp_port __rcu *garp_port;
1300 /* class/net/name entry */
1302 /* space for optional device, statistics, and wireless sysfs groups */
1303 const struct attribute_group *sysfs_groups[4];
1305 /* rtnetlink link ops */
1306 const struct rtnl_link_ops *rtnl_link_ops;
1308 /* for setting kernel sock attribute on TCP connection setup */
1309 #define GSO_MAX_SIZE 65536
1310 unsigned int gso_max_size;
1313 /* Data Center Bridging netlink ops */
1314 const struct dcbnl_rtnl_ops *dcbnl_ops;
1317 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1318 u8 prio_tc_map[TC_BITMASK + 1];
1320 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1321 /* max exchange id for FCoE LRO by ddp */
1322 unsigned int fcoe_ddp_xid;
1324 /* phy device may attach itself for hardware timestamping */
1325 struct phy_device *phydev;
1327 /* group the device belongs to */
1330 #define to_net_dev(d) container_of(d, struct net_device, dev)
1332 #define NETDEV_ALIGN 32
1335 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1337 return dev->prio_tc_map[prio & TC_BITMASK];
1341 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1343 if (tc >= dev->num_tc)
1346 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1351 void netdev_reset_tc(struct net_device *dev)
1354 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1355 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1359 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1361 if (tc >= dev->num_tc)
1364 dev->tc_to_txq[tc].count = count;
1365 dev->tc_to_txq[tc].offset = offset;
1370 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1372 if (num_tc > TC_MAX_QUEUE)
1375 dev->num_tc = num_tc;
1380 int netdev_get_num_tc(struct net_device *dev)
1386 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1389 return &dev->_tx[index];
1392 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1393 void (*f)(struct net_device *,
1394 struct netdev_queue *,
1400 for (i = 0; i < dev->num_tx_queues; i++)
1401 f(dev, &dev->_tx[i], arg);
1405 * Net namespace inlines
1408 struct net *dev_net(const struct net_device *dev)
1410 return read_pnet(&dev->nd_net);
1414 void dev_net_set(struct net_device *dev, struct net *net)
1416 #ifdef CONFIG_NET_NS
1417 release_net(dev->nd_net);
1418 dev->nd_net = hold_net(net);
1422 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1424 #ifdef CONFIG_NET_DSA_TAG_DSA
1425 if (dev->dsa_ptr != NULL)
1426 return dsa_uses_dsa_tags(dev->dsa_ptr);
1432 #ifndef CONFIG_NET_NS
1433 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1437 #else /* CONFIG_NET_NS */
1438 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1441 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1443 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1444 if (dev->dsa_ptr != NULL)
1445 return dsa_uses_trailer_tags(dev->dsa_ptr);
1452 * netdev_priv - access network device private data
1453 * @dev: network device
1455 * Get network device private data
1457 static inline void *netdev_priv(const struct net_device *dev)
1459 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1462 /* Set the sysfs physical device reference for the network logical device
1463 * if set prior to registration will cause a symlink during initialization.
1465 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1467 /* Set the sysfs device type for the network logical device to allow
1468 * fin grained indentification of different network device types. For
1469 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1471 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1474 * netif_napi_add - initialize a napi context
1475 * @dev: network device
1476 * @napi: napi context
1477 * @poll: polling function
1478 * @weight: default weight
1480 * netif_napi_add() must be used to initialize a napi context prior to calling
1481 * *any* of the other napi related functions.
1483 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1484 int (*poll)(struct napi_struct *, int), int weight);
1487 * netif_napi_del - remove a napi context
1488 * @napi: napi context
1490 * netif_napi_del() removes a napi context from the network device napi list
1492 void netif_napi_del(struct napi_struct *napi);
1494 struct napi_gro_cb {
1495 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1498 /* Length of frag0. */
1499 unsigned int frag0_len;
1501 /* This indicates where we are processing relative to skb->data. */
1504 /* This is non-zero if the packet may be of the same flow. */
1507 /* This is non-zero if the packet cannot be merged with the new skb. */
1510 /* Number of segments aggregated. */
1517 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1519 struct packet_type {
1520 __be16 type; /* This is really htons(ether_type). */
1521 struct net_device *dev; /* NULL is wildcarded here */
1522 int (*func) (struct sk_buff *,
1523 struct net_device *,
1524 struct packet_type *,
1525 struct net_device *);
1526 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1528 int (*gso_send_check)(struct sk_buff *skb);
1529 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1530 struct sk_buff *skb);
1531 int (*gro_complete)(struct sk_buff *skb);
1532 void *af_packet_priv;
1533 struct list_head list;
1536 #include <linux/notifier.h>
1538 extern rwlock_t dev_base_lock; /* Device list lock */
1541 #define for_each_netdev(net, d) \
1542 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1543 #define for_each_netdev_reverse(net, d) \
1544 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1545 #define for_each_netdev_rcu(net, d) \
1546 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1547 #define for_each_netdev_safe(net, d, n) \
1548 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1549 #define for_each_netdev_continue(net, d) \
1550 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1551 #define for_each_netdev_continue_rcu(net, d) \
1552 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1553 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1555 static inline struct net_device *next_net_device(struct net_device *dev)
1557 struct list_head *lh;
1561 lh = dev->dev_list.next;
1562 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1565 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1567 struct list_head *lh;
1571 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1572 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1575 static inline struct net_device *first_net_device(struct net *net)
1577 return list_empty(&net->dev_base_head) ? NULL :
1578 net_device_entry(net->dev_base_head.next);
1581 static inline struct net_device *first_net_device_rcu(struct net *net)
1583 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1585 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1588 extern int netdev_boot_setup_check(struct net_device *dev);
1589 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1590 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1591 const char *hwaddr);
1592 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1593 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1594 extern void dev_add_pack(struct packet_type *pt);
1595 extern void dev_remove_pack(struct packet_type *pt);
1596 extern void __dev_remove_pack(struct packet_type *pt);
1598 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1599 unsigned short mask);
1600 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1601 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1602 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1603 extern int dev_alloc_name(struct net_device *dev, const char *name);
1604 extern int dev_open(struct net_device *dev);
1605 extern int dev_close(struct net_device *dev);
1606 extern void dev_disable_lro(struct net_device *dev);
1607 extern int dev_queue_xmit(struct sk_buff *skb);
1608 extern int register_netdevice(struct net_device *dev);
1609 extern void unregister_netdevice_queue(struct net_device *dev,
1610 struct list_head *head);
1611 extern void unregister_netdevice_many(struct list_head *head);
1612 static inline void unregister_netdevice(struct net_device *dev)
1614 unregister_netdevice_queue(dev, NULL);
1617 extern int netdev_refcnt_read(const struct net_device *dev);
1618 extern void free_netdev(struct net_device *dev);
1619 extern void synchronize_net(void);
1620 extern int register_netdevice_notifier(struct notifier_block *nb);
1621 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1622 extern int init_dummy_netdev(struct net_device *dev);
1623 extern void netdev_resync_ops(struct net_device *dev);
1625 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1626 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1627 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1628 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1629 extern int dev_restart(struct net_device *dev);
1630 #ifdef CONFIG_NETPOLL_TRAP
1631 extern int netpoll_trap(void);
1633 extern int skb_gro_receive(struct sk_buff **head,
1634 struct sk_buff *skb);
1635 extern void skb_gro_reset_offset(struct sk_buff *skb);
1637 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1639 return NAPI_GRO_CB(skb)->data_offset;
1642 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1644 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1647 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1649 NAPI_GRO_CB(skb)->data_offset += len;
1652 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1653 unsigned int offset)
1655 return NAPI_GRO_CB(skb)->frag0 + offset;
1658 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1660 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1663 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1664 unsigned int offset)
1666 NAPI_GRO_CB(skb)->frag0 = NULL;
1667 NAPI_GRO_CB(skb)->frag0_len = 0;
1668 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1671 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1673 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1676 static inline void *skb_gro_network_header(struct sk_buff *skb)
1678 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1679 skb_network_offset(skb);
1682 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1683 unsigned short type,
1684 const void *daddr, const void *saddr,
1687 if (!dev->header_ops || !dev->header_ops->create)
1690 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1693 static inline int dev_parse_header(const struct sk_buff *skb,
1694 unsigned char *haddr)
1696 const struct net_device *dev = skb->dev;
1698 if (!dev->header_ops || !dev->header_ops->parse)
1700 return dev->header_ops->parse(skb, haddr);
1703 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1704 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1705 static inline int unregister_gifconf(unsigned int family)
1707 return register_gifconf(family, NULL);
1711 * Incoming packets are placed on per-cpu queues
1713 struct softnet_data {
1714 struct Qdisc *output_queue;
1715 struct Qdisc **output_queue_tailp;
1716 struct list_head poll_list;
1717 struct sk_buff *completion_queue;
1718 struct sk_buff_head process_queue;
1721 unsigned int processed;
1722 unsigned int time_squeeze;
1723 unsigned int cpu_collision;
1724 unsigned int received_rps;
1727 struct softnet_data *rps_ipi_list;
1729 /* Elements below can be accessed between CPUs for RPS */
1730 struct call_single_data csd ____cacheline_aligned_in_smp;
1731 struct softnet_data *rps_ipi_next;
1733 unsigned int input_queue_head;
1734 unsigned int input_queue_tail;
1737 struct sk_buff_head input_pkt_queue;
1738 struct napi_struct backlog;
1741 static inline void input_queue_head_incr(struct softnet_data *sd)
1744 sd->input_queue_head++;
1748 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1749 unsigned int *qtail)
1752 *qtail = ++sd->input_queue_tail;
1756 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1758 extern void __netif_schedule(struct Qdisc *q);
1760 static inline void netif_schedule_queue(struct netdev_queue *txq)
1762 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1763 __netif_schedule(txq->qdisc);
1766 static inline void netif_tx_schedule_all(struct net_device *dev)
1770 for (i = 0; i < dev->num_tx_queues; i++)
1771 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1774 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1776 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1780 * netif_start_queue - allow transmit
1781 * @dev: network device
1783 * Allow upper layers to call the device hard_start_xmit routine.
1785 static inline void netif_start_queue(struct net_device *dev)
1787 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1790 static inline void netif_tx_start_all_queues(struct net_device *dev)
1794 for (i = 0; i < dev->num_tx_queues; i++) {
1795 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1796 netif_tx_start_queue(txq);
1800 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1802 #ifdef CONFIG_NETPOLL_TRAP
1803 if (netpoll_trap()) {
1804 netif_tx_start_queue(dev_queue);
1808 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1809 __netif_schedule(dev_queue->qdisc);
1813 * netif_wake_queue - restart transmit
1814 * @dev: network device
1816 * Allow upper layers to call the device hard_start_xmit routine.
1817 * Used for flow control when transmit resources are available.
1819 static inline void netif_wake_queue(struct net_device *dev)
1821 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1824 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1828 for (i = 0; i < dev->num_tx_queues; i++) {
1829 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1830 netif_tx_wake_queue(txq);
1834 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1836 if (WARN_ON(!dev_queue)) {
1837 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1840 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1844 * netif_stop_queue - stop transmitted packets
1845 * @dev: network device
1847 * Stop upper layers calling the device hard_start_xmit routine.
1848 * Used for flow control when transmit resources are unavailable.
1850 static inline void netif_stop_queue(struct net_device *dev)
1852 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1855 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1859 for (i = 0; i < dev->num_tx_queues; i++) {
1860 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1861 netif_tx_stop_queue(txq);
1865 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1867 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1871 * netif_queue_stopped - test if transmit queue is flowblocked
1872 * @dev: network device
1874 * Test if transmit queue on device is currently unable to send.
1876 static inline int netif_queue_stopped(const struct net_device *dev)
1878 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1881 static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
1883 return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
1887 * netif_running - test if up
1888 * @dev: network device
1890 * Test if the device has been brought up.
1892 static inline int netif_running(const struct net_device *dev)
1894 return test_bit(__LINK_STATE_START, &dev->state);
1898 * Routines to manage the subqueues on a device. We only need start
1899 * stop, and a check if it's stopped. All other device management is
1900 * done at the overall netdevice level.
1901 * Also test the device if we're multiqueue.
1905 * netif_start_subqueue - allow sending packets on subqueue
1906 * @dev: network device
1907 * @queue_index: sub queue index
1909 * Start individual transmit queue of a device with multiple transmit queues.
1911 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1913 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1915 netif_tx_start_queue(txq);
1919 * netif_stop_subqueue - stop sending packets on subqueue
1920 * @dev: network device
1921 * @queue_index: sub queue index
1923 * Stop individual transmit queue of a device with multiple transmit queues.
1925 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1927 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1928 #ifdef CONFIG_NETPOLL_TRAP
1932 netif_tx_stop_queue(txq);
1936 * netif_subqueue_stopped - test status of subqueue
1937 * @dev: network device
1938 * @queue_index: sub queue index
1940 * Check individual transmit queue of a device with multiple transmit queues.
1942 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1945 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1947 return netif_tx_queue_stopped(txq);
1950 static inline int netif_subqueue_stopped(const struct net_device *dev,
1951 struct sk_buff *skb)
1953 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1957 * netif_wake_subqueue - allow sending packets on subqueue
1958 * @dev: network device
1959 * @queue_index: sub queue index
1961 * Resume individual transmit queue of a device with multiple transmit queues.
1963 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1965 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1966 #ifdef CONFIG_NETPOLL_TRAP
1970 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1971 __netif_schedule(txq->qdisc);
1975 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
1976 * as a distribution range limit for the returned value.
1978 static inline u16 skb_tx_hash(const struct net_device *dev,
1979 const struct sk_buff *skb)
1981 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
1985 * netif_is_multiqueue - test if device has multiple transmit queues
1986 * @dev: network device
1988 * Check if device has multiple transmit queues
1990 static inline int netif_is_multiqueue(const struct net_device *dev)
1992 return dev->num_tx_queues > 1;
1995 extern int netif_set_real_num_tx_queues(struct net_device *dev,
1999 extern int netif_set_real_num_rx_queues(struct net_device *dev,
2002 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
2009 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
2010 const struct net_device *from_dev)
2012 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
2014 return netif_set_real_num_rx_queues(to_dev,
2015 from_dev->real_num_rx_queues);
2021 /* Use this variant when it is known for sure that it
2022 * is executing from hardware interrupt context or with hardware interrupts
2025 extern void dev_kfree_skb_irq(struct sk_buff *skb);
2027 /* Use this variant in places where it could be invoked
2028 * from either hardware interrupt or other context, with hardware interrupts
2029 * either disabled or enabled.
2031 extern void dev_kfree_skb_any(struct sk_buff *skb);
2033 extern int netif_rx(struct sk_buff *skb);
2034 extern int netif_rx_ni(struct sk_buff *skb);
2035 extern int netif_receive_skb(struct sk_buff *skb);
2036 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
2037 struct sk_buff *skb);
2038 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
2039 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
2040 struct sk_buff *skb);
2041 extern void napi_gro_flush(struct napi_struct *napi);
2042 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
2043 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
2044 struct sk_buff *skb,
2046 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
2047 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
2049 static inline void napi_free_frags(struct napi_struct *napi)
2051 kfree_skb(napi->skb);
2055 extern int netdev_rx_handler_register(struct net_device *dev,
2056 rx_handler_func_t *rx_handler,
2057 void *rx_handler_data);
2058 extern void netdev_rx_handler_unregister(struct net_device *dev);
2060 extern int dev_valid_name(const char *name);
2061 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2062 extern int dev_ethtool(struct net *net, struct ifreq *);
2063 extern unsigned dev_get_flags(const struct net_device *);
2064 extern int __dev_change_flags(struct net_device *, unsigned int flags);
2065 extern int dev_change_flags(struct net_device *, unsigned);
2066 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
2067 extern int dev_change_name(struct net_device *, const char *);
2068 extern int dev_set_alias(struct net_device *, const char *, size_t);
2069 extern int dev_change_net_namespace(struct net_device *,
2070 struct net *, const char *);
2071 extern int dev_set_mtu(struct net_device *, int);
2072 extern void dev_set_group(struct net_device *, int);
2073 extern int dev_set_mac_address(struct net_device *,
2075 extern int dev_hard_start_xmit(struct sk_buff *skb,
2076 struct net_device *dev,
2077 struct netdev_queue *txq);
2078 extern int dev_forward_skb(struct net_device *dev,
2079 struct sk_buff *skb);
2081 extern int netdev_budget;
2083 /* Called by rtnetlink.c:rtnl_unlock() */
2084 extern void netdev_run_todo(void);
2087 * dev_put - release reference to device
2088 * @dev: network device
2090 * Release reference to device to allow it to be freed.
2092 static inline void dev_put(struct net_device *dev)
2094 irqsafe_cpu_dec(*dev->pcpu_refcnt);
2098 * dev_hold - get reference to device
2099 * @dev: network device
2101 * Hold reference to device to keep it from being freed.
2103 static inline void dev_hold(struct net_device *dev)
2105 irqsafe_cpu_inc(*dev->pcpu_refcnt);
2108 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2109 * and _off may be called from IRQ context, but it is caller
2110 * who is responsible for serialization of these calls.
2112 * The name carrier is inappropriate, these functions should really be
2113 * called netif_lowerlayer_*() because they represent the state of any
2114 * kind of lower layer not just hardware media.
2117 extern void linkwatch_fire_event(struct net_device *dev);
2118 extern void linkwatch_forget_dev(struct net_device *dev);
2121 * netif_carrier_ok - test if carrier present
2122 * @dev: network device
2124 * Check if carrier is present on device
2126 static inline int netif_carrier_ok(const struct net_device *dev)
2128 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2131 extern unsigned long dev_trans_start(struct net_device *dev);
2133 extern void __netdev_watchdog_up(struct net_device *dev);
2135 extern void netif_carrier_on(struct net_device *dev);
2137 extern void netif_carrier_off(struct net_device *dev);
2139 extern void netif_notify_peers(struct net_device *dev);
2142 * netif_dormant_on - mark device as dormant.
2143 * @dev: network device
2145 * Mark device as dormant (as per RFC2863).
2147 * The dormant state indicates that the relevant interface is not
2148 * actually in a condition to pass packets (i.e., it is not 'up') but is
2149 * in a "pending" state, waiting for some external event. For "on-
2150 * demand" interfaces, this new state identifies the situation where the
2151 * interface is waiting for events to place it in the up state.
2154 static inline void netif_dormant_on(struct net_device *dev)
2156 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2157 linkwatch_fire_event(dev);
2161 * netif_dormant_off - set device as not dormant.
2162 * @dev: network device
2164 * Device is not in dormant state.
2166 static inline void netif_dormant_off(struct net_device *dev)
2168 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2169 linkwatch_fire_event(dev);
2173 * netif_dormant - test if carrier present
2174 * @dev: network device
2176 * Check if carrier is present on device
2178 static inline int netif_dormant(const struct net_device *dev)
2180 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2185 * netif_oper_up - test if device is operational
2186 * @dev: network device
2188 * Check if carrier is operational
2190 static inline int netif_oper_up(const struct net_device *dev)
2192 return (dev->operstate == IF_OPER_UP ||
2193 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2197 * netif_device_present - is device available or removed
2198 * @dev: network device
2200 * Check if device has not been removed from system.
2202 static inline int netif_device_present(struct net_device *dev)
2204 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2207 extern void netif_device_detach(struct net_device *dev);
2209 extern void netif_device_attach(struct net_device *dev);
2212 * Network interface message level settings
2216 NETIF_MSG_DRV = 0x0001,
2217 NETIF_MSG_PROBE = 0x0002,
2218 NETIF_MSG_LINK = 0x0004,
2219 NETIF_MSG_TIMER = 0x0008,
2220 NETIF_MSG_IFDOWN = 0x0010,
2221 NETIF_MSG_IFUP = 0x0020,
2222 NETIF_MSG_RX_ERR = 0x0040,
2223 NETIF_MSG_TX_ERR = 0x0080,
2224 NETIF_MSG_TX_QUEUED = 0x0100,
2225 NETIF_MSG_INTR = 0x0200,
2226 NETIF_MSG_TX_DONE = 0x0400,
2227 NETIF_MSG_RX_STATUS = 0x0800,
2228 NETIF_MSG_PKTDATA = 0x1000,
2229 NETIF_MSG_HW = 0x2000,
2230 NETIF_MSG_WOL = 0x4000,
2233 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2234 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2235 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2236 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2237 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2238 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2239 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2240 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2241 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2242 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2243 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2244 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2245 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2246 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2247 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2249 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2252 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2253 return default_msg_enable_bits;
2254 if (debug_value == 0) /* no output */
2256 /* set low N bits */
2257 return (1 << debug_value) - 1;
2260 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2262 spin_lock(&txq->_xmit_lock);
2263 txq->xmit_lock_owner = cpu;
2266 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2268 spin_lock_bh(&txq->_xmit_lock);
2269 txq->xmit_lock_owner = smp_processor_id();
2272 static inline int __netif_tx_trylock(struct netdev_queue *txq)
2274 int ok = spin_trylock(&txq->_xmit_lock);
2276 txq->xmit_lock_owner = smp_processor_id();
2280 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2282 txq->xmit_lock_owner = -1;
2283 spin_unlock(&txq->_xmit_lock);
2286 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2288 txq->xmit_lock_owner = -1;
2289 spin_unlock_bh(&txq->_xmit_lock);
2292 static inline void txq_trans_update(struct netdev_queue *txq)
2294 if (txq->xmit_lock_owner != -1)
2295 txq->trans_start = jiffies;
2299 * netif_tx_lock - grab network device transmit lock
2300 * @dev: network device
2302 * Get network device transmit lock
2304 static inline void netif_tx_lock(struct net_device *dev)
2309 spin_lock(&dev->tx_global_lock);
2310 cpu = smp_processor_id();
2311 for (i = 0; i < dev->num_tx_queues; i++) {
2312 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2314 /* We are the only thread of execution doing a
2315 * freeze, but we have to grab the _xmit_lock in
2316 * order to synchronize with threads which are in
2317 * the ->hard_start_xmit() handler and already
2318 * checked the frozen bit.
2320 __netif_tx_lock(txq, cpu);
2321 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2322 __netif_tx_unlock(txq);
2326 static inline void netif_tx_lock_bh(struct net_device *dev)
2332 static inline void netif_tx_unlock(struct net_device *dev)
2336 for (i = 0; i < dev->num_tx_queues; i++) {
2337 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2339 /* No need to grab the _xmit_lock here. If the
2340 * queue is not stopped for another reason, we
2343 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2344 netif_schedule_queue(txq);
2346 spin_unlock(&dev->tx_global_lock);
2349 static inline void netif_tx_unlock_bh(struct net_device *dev)
2351 netif_tx_unlock(dev);
2355 #define HARD_TX_LOCK(dev, txq, cpu) { \
2356 if ((dev->features & NETIF_F_LLTX) == 0) { \
2357 __netif_tx_lock(txq, cpu); \
2361 #define HARD_TX_UNLOCK(dev, txq) { \
2362 if ((dev->features & NETIF_F_LLTX) == 0) { \
2363 __netif_tx_unlock(txq); \
2367 static inline void netif_tx_disable(struct net_device *dev)
2373 cpu = smp_processor_id();
2374 for (i = 0; i < dev->num_tx_queues; i++) {
2375 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2377 __netif_tx_lock(txq, cpu);
2378 netif_tx_stop_queue(txq);
2379 __netif_tx_unlock(txq);
2384 static inline void netif_addr_lock(struct net_device *dev)
2386 spin_lock(&dev->addr_list_lock);
2389 static inline void netif_addr_lock_bh(struct net_device *dev)
2391 spin_lock_bh(&dev->addr_list_lock);
2394 static inline void netif_addr_unlock(struct net_device *dev)
2396 spin_unlock(&dev->addr_list_lock);
2399 static inline void netif_addr_unlock_bh(struct net_device *dev)
2401 spin_unlock_bh(&dev->addr_list_lock);
2405 * dev_addrs walker. Should be used only for read access. Call with
2406 * rcu_read_lock held.
2408 #define for_each_dev_addr(dev, ha) \
2409 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2411 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2413 extern void ether_setup(struct net_device *dev);
2415 /* Support for loadable net-drivers */
2416 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2417 void (*setup)(struct net_device *),
2418 unsigned int txqs, unsigned int rxqs);
2419 #define alloc_netdev(sizeof_priv, name, setup) \
2420 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2422 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2423 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2425 extern int register_netdev(struct net_device *dev);
2426 extern void unregister_netdev(struct net_device *dev);
2428 /* General hardware address lists handling functions */
2429 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2430 struct netdev_hw_addr_list *from_list,
2431 int addr_len, unsigned char addr_type);
2432 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2433 struct netdev_hw_addr_list *from_list,
2434 int addr_len, unsigned char addr_type);
2435 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2436 struct netdev_hw_addr_list *from_list,
2438 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2439 struct netdev_hw_addr_list *from_list,
2441 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2442 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2444 /* Functions used for device addresses handling */
2445 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2446 unsigned char addr_type);
2447 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2448 unsigned char addr_type);
2449 extern int dev_addr_add_multiple(struct net_device *to_dev,
2450 struct net_device *from_dev,
2451 unsigned char addr_type);
2452 extern int dev_addr_del_multiple(struct net_device *to_dev,
2453 struct net_device *from_dev,
2454 unsigned char addr_type);
2455 extern void dev_addr_flush(struct net_device *dev);
2456 extern int dev_addr_init(struct net_device *dev);
2458 /* Functions used for unicast addresses handling */
2459 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2460 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2461 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2462 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2463 extern void dev_uc_flush(struct net_device *dev);
2464 extern void dev_uc_init(struct net_device *dev);
2466 /* Functions used for multicast addresses handling */
2467 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2468 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2469 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2470 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2471 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2472 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2473 extern void dev_mc_flush(struct net_device *dev);
2474 extern void dev_mc_init(struct net_device *dev);
2476 /* Functions used for secondary unicast and multicast support */
2477 extern void dev_set_rx_mode(struct net_device *dev);
2478 extern void __dev_set_rx_mode(struct net_device *dev);
2479 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2480 extern int dev_set_allmulti(struct net_device *dev, int inc);
2481 extern void netdev_state_change(struct net_device *dev);
2482 extern int netdev_bonding_change(struct net_device *dev,
2483 unsigned long event);
2484 extern void netdev_features_change(struct net_device *dev);
2485 /* Load a device via the kmod */
2486 extern void dev_load(struct net *net, const char *name);
2487 extern void dev_mcast_init(void);
2488 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2489 struct rtnl_link_stats64 *storage);
2491 extern int netdev_max_backlog;
2492 extern int netdev_tstamp_prequeue;
2493 extern int weight_p;
2494 extern int bpf_jit_enable;
2495 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2496 extern int netdev_set_bond_master(struct net_device *dev,
2497 struct net_device *master);
2498 extern int skb_checksum_help(struct sk_buff *skb);
2499 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features);
2501 extern void netdev_rx_csum_fault(struct net_device *dev);
2503 static inline void netdev_rx_csum_fault(struct net_device *dev)
2507 /* rx skb timestamps */
2508 extern void net_enable_timestamp(void);
2509 extern void net_disable_timestamp(void);
2511 #ifdef CONFIG_PROC_FS
2512 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2513 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2514 extern void dev_seq_stop(struct seq_file *seq, void *v);
2517 extern int netdev_class_create_file(struct class_attribute *class_attr);
2518 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2520 extern struct kobj_ns_type_operations net_ns_type_operations;
2522 extern const char *netdev_drivername(const struct net_device *dev);
2524 extern void linkwatch_run_queue(void);
2526 static inline u32 netdev_get_wanted_features(struct net_device *dev)
2528 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2530 u32 netdev_increment_features(u32 all, u32 one, u32 mask);
2531 int __netdev_update_features(struct net_device *dev);
2532 void netdev_update_features(struct net_device *dev);
2533 void netdev_change_features(struct net_device *dev);
2535 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2536 struct net_device *dev);
2538 u32 netif_skb_features(struct sk_buff *skb);
2540 static inline int net_gso_ok(u32 features, int gso_type)
2542 int feature = gso_type << NETIF_F_GSO_SHIFT;
2543 return (features & feature) == feature;
2546 static inline int skb_gso_ok(struct sk_buff *skb, u32 features)
2548 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2549 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2552 static inline int netif_needs_gso(struct sk_buff *skb, int features)
2554 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2555 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2558 static inline void netif_set_gso_max_size(struct net_device *dev,
2561 dev->gso_max_size = size;
2564 static inline int netif_is_bond_slave(struct net_device *dev)
2566 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2569 extern struct pernet_operations __net_initdata loopback_net_ops;
2571 int dev_ethtool_get_settings(struct net_device *dev,
2572 struct ethtool_cmd *cmd);
2574 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2576 if (dev->features & NETIF_F_RXCSUM)
2578 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2580 return dev->ethtool_ops->get_rx_csum(dev);
2583 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2585 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2587 return dev->ethtool_ops->get_flags(dev);
2590 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2592 /* netdev_printk helpers, similar to dev_printk */
2594 static inline const char *netdev_name(const struct net_device *dev)
2596 if (dev->reg_state != NETREG_REGISTERED)
2597 return "(unregistered net_device)";
2601 extern int netdev_printk(const char *level, const struct net_device *dev,
2602 const char *format, ...)
2603 __attribute__ ((format (printf, 3, 4)));
2604 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2605 __attribute__ ((format (printf, 2, 3)));
2606 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2607 __attribute__ ((format (printf, 2, 3)));
2608 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2609 __attribute__ ((format (printf, 2, 3)));
2610 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2611 __attribute__ ((format (printf, 2, 3)));
2612 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2613 __attribute__ ((format (printf, 2, 3)));
2614 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2615 __attribute__ ((format (printf, 2, 3)));
2616 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2617 __attribute__ ((format (printf, 2, 3)));
2619 #define MODULE_ALIAS_NETDEV(device) \
2620 MODULE_ALIAS("netdev-" device)
2623 #define netdev_dbg(__dev, format, args...) \
2624 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2625 #elif defined(CONFIG_DYNAMIC_DEBUG)
2626 #define netdev_dbg(__dev, format, args...) \
2628 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2629 netdev_name(__dev), ##args); \
2632 #define netdev_dbg(__dev, format, args...) \
2635 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2640 #if defined(VERBOSE_DEBUG)
2641 #define netdev_vdbg netdev_dbg
2644 #define netdev_vdbg(dev, format, args...) \
2647 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2653 * netdev_WARN() acts like dev_printk(), but with the key difference
2654 * of using a WARN/WARN_ON to get the message out, including the
2655 * file/line information and a backtrace.
2657 #define netdev_WARN(dev, format, args...) \
2658 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2660 /* netif printk helpers, similar to netdev_printk */
2662 #define netif_printk(priv, type, level, dev, fmt, args...) \
2664 if (netif_msg_##type(priv)) \
2665 netdev_printk(level, (dev), fmt, ##args); \
2668 #define netif_level(level, priv, type, dev, fmt, args...) \
2670 if (netif_msg_##type(priv)) \
2671 netdev_##level(dev, fmt, ##args); \
2674 #define netif_emerg(priv, type, dev, fmt, args...) \
2675 netif_level(emerg, priv, type, dev, fmt, ##args)
2676 #define netif_alert(priv, type, dev, fmt, args...) \
2677 netif_level(alert, priv, type, dev, fmt, ##args)
2678 #define netif_crit(priv, type, dev, fmt, args...) \
2679 netif_level(crit, priv, type, dev, fmt, ##args)
2680 #define netif_err(priv, type, dev, fmt, args...) \
2681 netif_level(err, priv, type, dev, fmt, ##args)
2682 #define netif_warn(priv, type, dev, fmt, args...) \
2683 netif_level(warn, priv, type, dev, fmt, ##args)
2684 #define netif_notice(priv, type, dev, fmt, args...) \
2685 netif_level(notice, priv, type, dev, fmt, ##args)
2686 #define netif_info(priv, type, dev, fmt, args...) \
2687 netif_level(info, priv, type, dev, fmt, ##args)
2690 #define netif_dbg(priv, type, dev, format, args...) \
2691 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2692 #elif defined(CONFIG_DYNAMIC_DEBUG)
2693 #define netif_dbg(priv, type, netdev, format, args...) \
2695 if (netif_msg_##type(priv)) \
2696 dynamic_dev_dbg((netdev)->dev.parent, \
2698 netdev_name(netdev), ##args); \
2701 #define netif_dbg(priv, type, dev, format, args...) \
2704 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2709 #if defined(VERBOSE_DEBUG)
2710 #define netif_vdbg netif_dbg
2712 #define netif_vdbg(priv, type, dev, format, args...) \
2715 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2720 #endif /* __KERNEL__ */
2722 #endif /* _LINUX_NETDEVICE_H */