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>
38 #include <asm/atomic.h>
39 #include <asm/cache.h>
40 #include <asm/byteorder.h>
42 #include <linux/device.h>
43 #include <linux/percpu.h>
44 #include <linux/rculist.h>
45 #include <linux/dmaengine.h>
46 #include <linux/workqueue.h>
48 #include <linux/ethtool.h>
49 #include <net/net_namespace.h>
52 #include <net/dcbnl.h>
60 /* source back-compat hooks */
61 #define SET_ETHTOOL_OPS(netdev,ops) \
62 ( (netdev)->ethtool_ops = (ops) )
64 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
65 functions are available. */
66 #define HAVE_FREE_NETDEV /* free_netdev() */
67 #define HAVE_NETDEV_PRIV /* netdev_priv() */
69 /* hardware address assignment types */
70 #define NET_ADDR_PERM 0 /* address is permanent (default) */
71 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
72 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
74 /* Backlog congestion levels */
75 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
76 #define NET_RX_DROP 1 /* packet dropped */
78 /* Initial net device group. All devices belong to group 0 by default. */
79 #define INIT_NETDEV_GROUP 0
82 * Transmit return codes: transmit return codes originate from three different
85 * - qdisc return codes
86 * - driver transmit return codes
89 * Drivers are allowed to return any one of those in their hard_start_xmit()
90 * function. Real network devices commonly used with qdiscs should only return
91 * the driver transmit return codes though - when qdiscs are used, the actual
92 * transmission happens asynchronously, so the value is not propagated to
93 * higher layers. Virtual network devices transmit synchronously, in this case
94 * the driver transmit return codes are consumed by dev_queue_xmit(), all
95 * others are propagated to higher layers.
98 /* qdisc ->enqueue() return codes. */
99 #define NET_XMIT_SUCCESS 0x00
100 #define NET_XMIT_DROP 0x01 /* skb dropped */
101 #define NET_XMIT_CN 0x02 /* congestion notification */
102 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
103 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
105 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
106 * indicates that the device will soon be dropping packets, or already drops
107 * some packets of the same priority; prompting us to send less aggressively. */
108 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
109 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
111 /* Driver transmit return codes */
112 #define NETDEV_TX_MASK 0xf0
115 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
116 NETDEV_TX_OK = 0x00, /* driver took care of packet */
117 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
118 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
120 typedef enum netdev_tx netdev_tx_t;
123 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
124 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
126 static inline bool dev_xmit_complete(int rc)
129 * Positive cases with an skb consumed by a driver:
130 * - successful transmission (rc == NETDEV_TX_OK)
131 * - error while transmitting (rc < 0)
132 * - error while queueing to a different device (rc & NET_XMIT_MASK)
134 if (likely(rc < NET_XMIT_MASK))
142 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
146 * Compute the worst case header length according to the protocols
150 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
151 # if defined(CONFIG_MAC80211_MESH)
152 # define LL_MAX_HEADER 128
154 # define LL_MAX_HEADER 96
156 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
157 # define LL_MAX_HEADER 48
159 # define LL_MAX_HEADER 32
162 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
163 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
164 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
165 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
166 #define MAX_HEADER LL_MAX_HEADER
168 #define MAX_HEADER (LL_MAX_HEADER + 48)
172 * Old network device statistics. Fields are native words
173 * (unsigned long) so they can be read and written atomically.
176 struct net_device_stats {
177 unsigned long rx_packets;
178 unsigned long tx_packets;
179 unsigned long rx_bytes;
180 unsigned long tx_bytes;
181 unsigned long rx_errors;
182 unsigned long tx_errors;
183 unsigned long rx_dropped;
184 unsigned long tx_dropped;
185 unsigned long multicast;
186 unsigned long collisions;
187 unsigned long rx_length_errors;
188 unsigned long rx_over_errors;
189 unsigned long rx_crc_errors;
190 unsigned long rx_frame_errors;
191 unsigned long rx_fifo_errors;
192 unsigned long rx_missed_errors;
193 unsigned long tx_aborted_errors;
194 unsigned long tx_carrier_errors;
195 unsigned long tx_fifo_errors;
196 unsigned long tx_heartbeat_errors;
197 unsigned long tx_window_errors;
198 unsigned long rx_compressed;
199 unsigned long tx_compressed;
202 #endif /* __KERNEL__ */
205 /* Media selection options. */
218 #include <linux/cache.h>
219 #include <linux/skbuff.h>
225 struct netdev_hw_addr {
226 struct list_head list;
227 unsigned char addr[MAX_ADDR_LEN];
229 #define NETDEV_HW_ADDR_T_LAN 1
230 #define NETDEV_HW_ADDR_T_SAN 2
231 #define NETDEV_HW_ADDR_T_SLAVE 3
232 #define NETDEV_HW_ADDR_T_UNICAST 4
233 #define NETDEV_HW_ADDR_T_MULTICAST 5
237 struct rcu_head rcu_head;
240 struct netdev_hw_addr_list {
241 struct list_head list;
245 #define netdev_hw_addr_list_count(l) ((l)->count)
246 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
247 #define netdev_hw_addr_list_for_each(ha, l) \
248 list_for_each_entry(ha, &(l)->list, list)
250 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
251 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
252 #define netdev_for_each_uc_addr(ha, dev) \
253 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
255 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
256 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
257 #define netdev_for_each_mc_addr(ha, dev) \
258 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
261 struct hh_cache *hh_next; /* Next entry */
262 atomic_t hh_refcnt; /* number of users */
264 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
266 * They are mostly read, but hh_refcnt may be changed quite frequently,
267 * incurring cache line ping pongs.
269 __be16 hh_type ____cacheline_aligned_in_smp;
270 /* protocol identifier, f.e ETH_P_IP
271 * NOTE: For VLANs, this will be the
272 * encapuslated type. --BLG
274 u16 hh_len; /* length of header */
275 int (*hh_output)(struct sk_buff *skb);
278 /* cached hardware header; allow for machine alignment needs. */
279 #define HH_DATA_MOD 16
280 #define HH_DATA_OFF(__len) \
281 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
282 #define HH_DATA_ALIGN(__len) \
283 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
284 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
287 static inline void hh_cache_put(struct hh_cache *hh)
289 if (atomic_dec_and_test(&hh->hh_refcnt))
293 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
295 * dev->hard_header_len ? (dev->hard_header_len +
296 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
298 * We could use other alignment values, but we must maintain the
299 * relationship HH alignment <= LL alignment.
301 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
304 #define LL_RESERVED_SPACE(dev) \
305 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
306 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
307 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308 #define LL_ALLOCATED_SPACE(dev) \
309 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
312 int (*create) (struct sk_buff *skb, struct net_device *dev,
313 unsigned short type, const void *daddr,
314 const void *saddr, unsigned len);
315 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
316 int (*rebuild)(struct sk_buff *skb);
317 #define HAVE_HEADER_CACHE
318 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
319 void (*cache_update)(struct hh_cache *hh,
320 const struct net_device *dev,
321 const unsigned char *haddr);
324 /* These flag bits are private to the generic network queueing
325 * layer, they may not be explicitly referenced by any other
329 enum netdev_state_t {
331 __LINK_STATE_PRESENT,
332 __LINK_STATE_NOCARRIER,
333 __LINK_STATE_LINKWATCH_PENDING,
334 __LINK_STATE_DORMANT,
339 * This structure holds at boot time configured netdevice settings. They
340 * are then used in the device probing.
342 struct netdev_boot_setup {
346 #define NETDEV_BOOT_SETUP_MAX 8
348 extern int __init netdev_boot_setup(char *str);
351 * Structure for NAPI scheduling similar to tasklet but with weighting
354 /* The poll_list must only be managed by the entity which
355 * changes the state of the NAPI_STATE_SCHED bit. This means
356 * whoever atomically sets that bit can add this napi_struct
357 * to the per-cpu poll_list, and whoever clears that bit
358 * can remove from the list right before clearing the bit.
360 struct list_head poll_list;
364 int (*poll)(struct napi_struct *, int);
365 #ifdef CONFIG_NETPOLL
366 spinlock_t poll_lock;
370 unsigned int gro_count;
372 struct net_device *dev;
373 struct list_head dev_list;
374 struct sk_buff *gro_list;
379 NAPI_STATE_SCHED, /* Poll is scheduled */
380 NAPI_STATE_DISABLE, /* Disable pending */
381 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
391 typedef enum gro_result gro_result_t;
393 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
395 extern void __napi_schedule(struct napi_struct *n);
397 static inline int napi_disable_pending(struct napi_struct *n)
399 return test_bit(NAPI_STATE_DISABLE, &n->state);
403 * napi_schedule_prep - check if napi can be scheduled
406 * Test if NAPI routine is already running, and if not mark
407 * it as running. This is used as a condition variable
408 * insure only one NAPI poll instance runs. We also make
409 * sure there is no pending NAPI disable.
411 static inline int napi_schedule_prep(struct napi_struct *n)
413 return !napi_disable_pending(n) &&
414 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
418 * napi_schedule - schedule NAPI poll
421 * Schedule NAPI poll routine to be called if it is not already
424 static inline void napi_schedule(struct napi_struct *n)
426 if (napi_schedule_prep(n))
430 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
431 static inline int napi_reschedule(struct napi_struct *napi)
433 if (napi_schedule_prep(napi)) {
434 __napi_schedule(napi);
441 * napi_complete - NAPI processing complete
444 * Mark NAPI processing as complete.
446 extern void __napi_complete(struct napi_struct *n);
447 extern void napi_complete(struct napi_struct *n);
450 * napi_disable - prevent NAPI from scheduling
453 * Stop NAPI from being scheduled on this context.
454 * Waits till any outstanding processing completes.
456 static inline void napi_disable(struct napi_struct *n)
458 set_bit(NAPI_STATE_DISABLE, &n->state);
459 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
461 clear_bit(NAPI_STATE_DISABLE, &n->state);
465 * napi_enable - enable NAPI scheduling
468 * Resume NAPI from being scheduled on this context.
469 * Must be paired with napi_disable.
471 static inline void napi_enable(struct napi_struct *n)
473 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
474 smp_mb__before_clear_bit();
475 clear_bit(NAPI_STATE_SCHED, &n->state);
480 * napi_synchronize - wait until NAPI is not running
483 * Wait until NAPI is done being scheduled on this context.
484 * Waits till any outstanding processing completes but
485 * does not disable future activations.
487 static inline void napi_synchronize(const struct napi_struct *n)
489 while (test_bit(NAPI_STATE_SCHED, &n->state))
493 # define napi_synchronize(n) barrier()
496 enum netdev_queue_state_t {
498 __QUEUE_STATE_FROZEN,
499 #define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \
500 (1 << __QUEUE_STATE_FROZEN))
503 struct netdev_queue {
507 struct net_device *dev;
510 struct Qdisc *qdisc_sleeping;
514 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
520 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
523 * please use this field instead of dev->trans_start
525 unsigned long trans_start;
526 } ____cacheline_aligned_in_smp;
528 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
530 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
537 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
539 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
546 * This structure holds an RPS map which can be of variable length. The
547 * map is an array of CPUs.
554 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
557 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
558 * tail pointer for that CPU's input queue at the time of last enqueue.
560 struct rps_dev_flow {
563 unsigned int last_qtail;
567 * The rps_dev_flow_table structure contains a table of flow mappings.
569 struct rps_dev_flow_table {
572 struct work_struct free_work;
573 struct rps_dev_flow flows[0];
575 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
576 (_num * sizeof(struct rps_dev_flow)))
579 * The rps_sock_flow_table contains mappings of flows to the last CPU
580 * on which they were processed by the application (set in recvmsg).
582 struct rps_sock_flow_table {
586 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
587 (_num * sizeof(u16)))
589 #define RPS_NO_CPU 0xffff
591 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
595 unsigned int cpu, index = hash & table->mask;
597 /* We only give a hint, preemption can change cpu under us */
598 cpu = raw_smp_processor_id();
600 if (table->ents[index] != cpu)
601 table->ents[index] = cpu;
605 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
609 table->ents[hash & table->mask] = RPS_NO_CPU;
612 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
614 /* This structure contains an instance of an RX queue. */
615 struct netdev_rx_queue {
616 struct rps_map __rcu *rps_map;
617 struct rps_dev_flow_table __rcu *rps_flow_table;
619 struct net_device *dev;
620 } ____cacheline_aligned_in_smp;
621 #endif /* CONFIG_RPS */
625 * This structure holds an XPS map which can be of variable length. The
626 * map is an array of queues.
630 unsigned int alloc_len;
634 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
635 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
639 * This structure holds all XPS maps for device. Maps are indexed by CPU.
641 struct xps_dev_maps {
643 struct xps_map __rcu *cpu_map[0];
645 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
646 (nr_cpu_ids * sizeof(struct xps_map *)))
647 #endif /* CONFIG_XPS */
649 #define TC_MAX_QUEUE 16
650 #define TC_BITMASK 15
651 /* HW offloaded queuing disciplines txq count and offset maps */
652 struct netdev_tc_txq {
658 * This structure defines the management hooks for network devices.
659 * The following hooks can be defined; unless noted otherwise, they are
660 * optional and can be filled with a null pointer.
662 * int (*ndo_init)(struct net_device *dev);
663 * This function is called once when network device is registered.
664 * The network device can use this to any late stage initializaton
665 * or semantic validattion. It can fail with an error code which will
666 * be propogated back to register_netdev
668 * void (*ndo_uninit)(struct net_device *dev);
669 * This function is called when device is unregistered or when registration
670 * fails. It is not called if init fails.
672 * int (*ndo_open)(struct net_device *dev);
673 * This function is called when network device transistions to the up
676 * int (*ndo_stop)(struct net_device *dev);
677 * This function is called when network device transistions to the down
680 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
681 * struct net_device *dev);
682 * Called when a packet needs to be transmitted.
683 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
684 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
685 * Required can not be NULL.
687 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
688 * Called to decide which queue to when device supports multiple
691 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
692 * This function is called to allow device receiver to make
693 * changes to configuration when multicast or promiscious is enabled.
695 * void (*ndo_set_rx_mode)(struct net_device *dev);
696 * This function is called device changes address list filtering.
698 * void (*ndo_set_multicast_list)(struct net_device *dev);
699 * This function is called when the multicast address list changes.
701 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
702 * This function is called when the Media Access Control address
703 * needs to be changed. If this interface is not defined, the
704 * mac address can not be changed.
706 * int (*ndo_validate_addr)(struct net_device *dev);
707 * Test if Media Access Control address is valid for the device.
709 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
710 * Called when a user request an ioctl which can't be handled by
711 * the generic interface code. If not defined ioctl's return
712 * not supported error code.
714 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
715 * Used to set network devices bus interface parameters. This interface
716 * is retained for legacy reason, new devices should use the bus
717 * interface (PCI) for low level management.
719 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
720 * Called when a user wants to change the Maximum Transfer Unit
721 * of a device. If not defined, any request to change MTU will
722 * will return an error.
724 * void (*ndo_tx_timeout)(struct net_device *dev);
725 * Callback uses when the transmitter has not made any progress
726 * for dev->watchdog ticks.
728 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
729 * struct rtnl_link_stats64 *storage);
730 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
731 * Called when a user wants to get the network device usage
732 * statistics. Drivers must do one of the following:
733 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
734 * rtnl_link_stats64 structure passed by the caller.
735 * 2. Define @ndo_get_stats to update a net_device_stats structure
736 * (which should normally be dev->stats) and return a pointer to
737 * it. The structure may be changed asynchronously only if each
738 * field is written atomically.
739 * 3. Update dev->stats asynchronously and atomically, and define
742 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
743 * If device support VLAN receive acceleration
744 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
745 * when vlan groups for the device changes. Note: grp is NULL
746 * if no vlan's groups are being used.
748 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
749 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
750 * this function is called when a VLAN id is registered.
752 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
753 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
754 * this function is called when a VLAN id is unregistered.
756 * void (*ndo_poll_controller)(struct net_device *dev);
758 * SR-IOV management functions.
759 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
760 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
761 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
762 * int (*ndo_get_vf_config)(struct net_device *dev,
763 * int vf, struct ifla_vf_info *ivf);
764 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
765 * struct nlattr *port[]);
766 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
767 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
768 * Called to setup 'tc' number of traffic classes in the net device. This
769 * is always called from the stack with the rtnl lock held and netif tx
770 * queues stopped. This allows the netdevice to perform queue management
773 #define HAVE_NET_DEVICE_OPS
774 struct net_device_ops {
775 int (*ndo_init)(struct net_device *dev);
776 void (*ndo_uninit)(struct net_device *dev);
777 int (*ndo_open)(struct net_device *dev);
778 int (*ndo_stop)(struct net_device *dev);
779 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
780 struct net_device *dev);
781 u16 (*ndo_select_queue)(struct net_device *dev,
782 struct sk_buff *skb);
783 void (*ndo_change_rx_flags)(struct net_device *dev,
785 void (*ndo_set_rx_mode)(struct net_device *dev);
786 void (*ndo_set_multicast_list)(struct net_device *dev);
787 int (*ndo_set_mac_address)(struct net_device *dev,
789 int (*ndo_validate_addr)(struct net_device *dev);
790 int (*ndo_do_ioctl)(struct net_device *dev,
791 struct ifreq *ifr, int cmd);
792 int (*ndo_set_config)(struct net_device *dev,
794 int (*ndo_change_mtu)(struct net_device *dev,
796 int (*ndo_neigh_setup)(struct net_device *dev,
797 struct neigh_parms *);
798 void (*ndo_tx_timeout) (struct net_device *dev);
800 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
801 struct rtnl_link_stats64 *storage);
802 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
804 void (*ndo_vlan_rx_register)(struct net_device *dev,
805 struct vlan_group *grp);
806 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
808 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
810 #ifdef CONFIG_NET_POLL_CONTROLLER
811 void (*ndo_poll_controller)(struct net_device *dev);
812 int (*ndo_netpoll_setup)(struct net_device *dev,
813 struct netpoll_info *info);
814 void (*ndo_netpoll_cleanup)(struct net_device *dev);
816 int (*ndo_set_vf_mac)(struct net_device *dev,
818 int (*ndo_set_vf_vlan)(struct net_device *dev,
819 int queue, u16 vlan, u8 qos);
820 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
822 int (*ndo_get_vf_config)(struct net_device *dev,
824 struct ifla_vf_info *ivf);
825 int (*ndo_set_vf_port)(struct net_device *dev,
827 struct nlattr *port[]);
828 int (*ndo_get_vf_port)(struct net_device *dev,
829 int vf, struct sk_buff *skb);
830 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
831 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
832 int (*ndo_fcoe_enable)(struct net_device *dev);
833 int (*ndo_fcoe_disable)(struct net_device *dev);
834 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
836 struct scatterlist *sgl,
838 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
840 #define NETDEV_FCOE_WWNN 0
841 #define NETDEV_FCOE_WWPN 1
842 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
848 * The DEVICE structure.
849 * Actually, this whole structure is a big mistake. It mixes I/O
850 * data with strictly "high-level" data, and it has to know about
851 * almost every data structure used in the INET module.
853 * FIXME: cleanup struct net_device such that network protocol info
860 * This is the first field of the "visible" part of this structure
861 * (i.e. as seen by users in the "Space.c" file). It is the name
866 struct pm_qos_request_list pm_qos_req;
868 /* device name hash chain */
869 struct hlist_node name_hlist;
874 * I/O specific fields
875 * FIXME: Merge these and struct ifmap into one
877 unsigned long mem_end; /* shared mem end */
878 unsigned long mem_start; /* shared mem start */
879 unsigned long base_addr; /* device I/O address */
880 unsigned int irq; /* device IRQ number */
883 * Some hardware also needs these fields, but they are not
884 * part of the usual set specified in Space.c.
887 unsigned char if_port; /* Selectable AUI, TP,..*/
888 unsigned char dma; /* DMA channel */
892 struct list_head dev_list;
893 struct list_head napi_list;
894 struct list_head unreg_list;
896 /* Net device features */
897 unsigned long features;
898 #define NETIF_F_SG 1 /* Scatter/gather IO. */
899 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
900 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
901 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
902 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
903 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
904 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
905 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
906 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
907 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
908 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
909 #define NETIF_F_GSO 2048 /* Enable software GSO. */
910 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
911 /* do not use LLTX in new drivers */
912 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
913 #define NETIF_F_GRO 16384 /* Generic receive offload */
914 #define NETIF_F_LRO 32768 /* large receive offload */
916 /* the GSO_MASK reserves bits 16 through 23 */
917 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
918 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
919 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
920 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
921 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
923 /* Segmentation offload features */
924 #define NETIF_F_GSO_SHIFT 16
925 #define NETIF_F_GSO_MASK 0x00ff0000
926 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
927 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
928 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
929 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
930 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
931 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
933 /* List of features with software fallbacks. */
934 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
935 NETIF_F_TSO6 | NETIF_F_UFO)
938 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
939 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
940 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
941 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
944 * If one device supports one of these features, then enable them
945 * for all in netdev_increment_features.
947 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
948 NETIF_F_SG | NETIF_F_HIGHDMA | \
951 /* Interface index. Unique device identifier */
955 struct net_device_stats stats;
956 atomic_long_t rx_dropped; /* dropped packets by core network
957 * Do not use this in drivers.
960 #ifdef CONFIG_WIRELESS_EXT
961 /* List of functions to handle Wireless Extensions (instead of ioctl).
962 * See <net/iw_handler.h> for details. Jean II */
963 const struct iw_handler_def * wireless_handlers;
964 /* Instance data managed by the core of Wireless Extensions. */
965 struct iw_public_data * wireless_data;
967 /* Management operations */
968 const struct net_device_ops *netdev_ops;
969 const struct ethtool_ops *ethtool_ops;
971 /* Hardware header description */
972 const struct header_ops *header_ops;
974 unsigned int flags; /* interface flags (a la BSD) */
975 unsigned short gflags;
976 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
977 unsigned short padded; /* How much padding added by alloc_netdev() */
979 unsigned char operstate; /* RFC2863 operstate */
980 unsigned char link_mode; /* mapping policy to operstate */
982 unsigned int mtu; /* interface MTU value */
983 unsigned short type; /* interface hardware type */
984 unsigned short hard_header_len; /* hardware hdr length */
986 /* extra head- and tailroom the hardware may need, but not in all cases
987 * can this be guaranteed, especially tailroom. Some cases also use
988 * LL_MAX_HEADER instead to allocate the skb.
990 unsigned short needed_headroom;
991 unsigned short needed_tailroom;
993 /* Interface address info. */
994 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
995 unsigned char addr_assign_type; /* hw address assignment type */
996 unsigned char addr_len; /* hardware address length */
997 unsigned short dev_id; /* for shared network cards */
999 spinlock_t addr_list_lock;
1000 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1001 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1003 unsigned int promiscuity;
1004 unsigned int allmulti;
1007 /* Protocol specific pointers */
1009 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1010 struct vlan_group __rcu *vlgrp; /* VLAN group */
1012 #ifdef CONFIG_NET_DSA
1013 void *dsa_ptr; /* dsa specific data */
1015 void *atalk_ptr; /* AppleTalk link */
1016 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1017 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1018 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1019 void *ec_ptr; /* Econet specific data */
1020 void *ax25_ptr; /* AX.25 specific data */
1021 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1022 assign before registering */
1025 * Cache lines mostly used on receive path (including eth_type_trans())
1027 unsigned long last_rx; /* Time of last Rx
1028 * This should not be set in
1029 * drivers, unless really needed,
1030 * because network stack (bonding)
1031 * use it if/when necessary, to
1032 * avoid dirtying this cache line.
1035 struct net_device *master; /* Pointer to master device of a group,
1036 * which this device is member of.
1039 /* Interface address info used in eth_type_trans() */
1040 unsigned char *dev_addr; /* hw address, (before bcast
1041 because most packets are
1044 struct netdev_hw_addr_list dev_addrs; /* list of device
1047 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1050 struct kset *queues_kset;
1052 struct netdev_rx_queue *_rx;
1054 /* Number of RX queues allocated at register_netdev() time */
1055 unsigned int num_rx_queues;
1057 /* Number of RX queues currently active in device */
1058 unsigned int real_num_rx_queues;
1061 rx_handler_func_t __rcu *rx_handler;
1062 void __rcu *rx_handler_data;
1064 struct netdev_queue __rcu *ingress_queue;
1067 * Cache lines mostly used on transmit path
1069 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1071 /* Number of TX queues allocated at alloc_netdev_mq() time */
1072 unsigned int num_tx_queues;
1074 /* Number of TX queues currently active in device */
1075 unsigned int real_num_tx_queues;
1077 /* root qdisc from userspace point of view */
1078 struct Qdisc *qdisc;
1080 unsigned long tx_queue_len; /* Max frames per queue allowed */
1081 spinlock_t tx_global_lock;
1084 struct xps_dev_maps __rcu *xps_maps;
1087 /* These may be needed for future network-power-down code. */
1090 * trans_start here is expensive for high speed devices on SMP,
1091 * please use netdev_queue->trans_start instead.
1093 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1095 int watchdog_timeo; /* used by dev_watchdog() */
1096 struct timer_list watchdog_timer;
1098 /* Number of references to this device */
1099 int __percpu *pcpu_refcnt;
1101 /* delayed register/unregister */
1102 struct list_head todo_list;
1103 /* device index hash chain */
1104 struct hlist_node index_hlist;
1106 struct list_head link_watch_list;
1108 /* register/unregister state machine */
1109 enum { NETREG_UNINITIALIZED=0,
1110 NETREG_REGISTERED, /* completed register_netdevice */
1111 NETREG_UNREGISTERING, /* called unregister_netdevice */
1112 NETREG_UNREGISTERED, /* completed unregister todo */
1113 NETREG_RELEASED, /* called free_netdev */
1114 NETREG_DUMMY, /* dummy device for NAPI poll */
1118 RTNL_LINK_INITIALIZED,
1119 RTNL_LINK_INITIALIZING,
1120 } rtnl_link_state:16;
1122 /* Called from unregister, can be used to call free_netdev */
1123 void (*destructor)(struct net_device *dev);
1125 #ifdef CONFIG_NETPOLL
1126 struct netpoll_info *npinfo;
1129 #ifdef CONFIG_NET_NS
1130 /* Network namespace this network device is inside */
1134 /* mid-layer private */
1137 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1138 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1139 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1142 struct garp_port __rcu *garp_port;
1144 /* class/net/name entry */
1146 /* space for optional device, statistics, and wireless sysfs groups */
1147 const struct attribute_group *sysfs_groups[4];
1149 /* rtnetlink link ops */
1150 const struct rtnl_link_ops *rtnl_link_ops;
1152 /* VLAN feature mask */
1153 unsigned long vlan_features;
1155 /* for setting kernel sock attribute on TCP connection setup */
1156 #define GSO_MAX_SIZE 65536
1157 unsigned int gso_max_size;
1160 /* Data Center Bridging netlink ops */
1161 const struct dcbnl_rtnl_ops *dcbnl_ops;
1164 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1165 u8 prio_tc_map[TC_BITMASK + 1];
1167 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1168 /* max exchange id for FCoE LRO by ddp */
1169 unsigned int fcoe_ddp_xid;
1171 /* n-tuple filter list attached to this device */
1172 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1174 /* phy device may attach itself for hardware timestamping */
1175 struct phy_device *phydev;
1177 /* group the device belongs to */
1180 #define to_net_dev(d) container_of(d, struct net_device, dev)
1182 #define NETDEV_ALIGN 32
1185 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1187 return dev->prio_tc_map[prio & TC_BITMASK];
1191 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1193 if (tc >= dev->num_tc)
1196 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1201 void netdev_reset_tc(struct net_device *dev)
1204 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1205 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1209 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1211 if (tc >= dev->num_tc)
1214 dev->tc_to_txq[tc].count = count;
1215 dev->tc_to_txq[tc].offset = offset;
1220 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1222 if (num_tc > TC_MAX_QUEUE)
1225 dev->num_tc = num_tc;
1230 int netdev_get_num_tc(struct net_device *dev)
1236 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1239 return &dev->_tx[index];
1242 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1243 void (*f)(struct net_device *,
1244 struct netdev_queue *,
1250 for (i = 0; i < dev->num_tx_queues; i++)
1251 f(dev, &dev->_tx[i], arg);
1255 * Net namespace inlines
1258 struct net *dev_net(const struct net_device *dev)
1260 return read_pnet(&dev->nd_net);
1264 void dev_net_set(struct net_device *dev, struct net *net)
1266 #ifdef CONFIG_NET_NS
1267 release_net(dev->nd_net);
1268 dev->nd_net = hold_net(net);
1272 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1274 #ifdef CONFIG_NET_DSA_TAG_DSA
1275 if (dev->dsa_ptr != NULL)
1276 return dsa_uses_dsa_tags(dev->dsa_ptr);
1282 #ifndef CONFIG_NET_NS
1283 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1287 #else /* CONFIG_NET_NS */
1288 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1291 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1293 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1294 if (dev->dsa_ptr != NULL)
1295 return dsa_uses_trailer_tags(dev->dsa_ptr);
1302 * netdev_priv - access network device private data
1303 * @dev: network device
1305 * Get network device private data
1307 static inline void *netdev_priv(const struct net_device *dev)
1309 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1312 /* Set the sysfs physical device reference for the network logical device
1313 * if set prior to registration will cause a symlink during initialization.
1315 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1317 /* Set the sysfs device type for the network logical device to allow
1318 * fin grained indentification of different network device types. For
1319 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1321 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1324 * netif_napi_add - initialize a napi context
1325 * @dev: network device
1326 * @napi: napi context
1327 * @poll: polling function
1328 * @weight: default weight
1330 * netif_napi_add() must be used to initialize a napi context prior to calling
1331 * *any* of the other napi related functions.
1333 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1334 int (*poll)(struct napi_struct *, int), int weight);
1337 * netif_napi_del - remove a napi context
1338 * @napi: napi context
1340 * netif_napi_del() removes a napi context from the network device napi list
1342 void netif_napi_del(struct napi_struct *napi);
1344 struct napi_gro_cb {
1345 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1348 /* Length of frag0. */
1349 unsigned int frag0_len;
1351 /* This indicates where we are processing relative to skb->data. */
1354 /* This is non-zero if the packet may be of the same flow. */
1357 /* This is non-zero if the packet cannot be merged with the new skb. */
1360 /* Number of segments aggregated. */
1367 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1369 struct packet_type {
1370 __be16 type; /* This is really htons(ether_type). */
1371 struct net_device *dev; /* NULL is wildcarded here */
1372 int (*func) (struct sk_buff *,
1373 struct net_device *,
1374 struct packet_type *,
1375 struct net_device *);
1376 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1378 int (*gso_send_check)(struct sk_buff *skb);
1379 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1380 struct sk_buff *skb);
1381 int (*gro_complete)(struct sk_buff *skb);
1382 void *af_packet_priv;
1383 struct list_head list;
1386 #include <linux/interrupt.h>
1387 #include <linux/notifier.h>
1389 extern rwlock_t dev_base_lock; /* Device list lock */
1392 #define for_each_netdev(net, d) \
1393 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1394 #define for_each_netdev_reverse(net, d) \
1395 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1396 #define for_each_netdev_rcu(net, d) \
1397 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1398 #define for_each_netdev_safe(net, d, n) \
1399 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1400 #define for_each_netdev_continue(net, d) \
1401 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1402 #define for_each_netdev_continue_rcu(net, d) \
1403 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1404 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1406 static inline struct net_device *next_net_device(struct net_device *dev)
1408 struct list_head *lh;
1412 lh = dev->dev_list.next;
1413 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1416 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1418 struct list_head *lh;
1422 lh = rcu_dereference(dev->dev_list.next);
1423 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1426 static inline struct net_device *first_net_device(struct net *net)
1428 return list_empty(&net->dev_base_head) ? NULL :
1429 net_device_entry(net->dev_base_head.next);
1432 extern int netdev_boot_setup_check(struct net_device *dev);
1433 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1434 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1435 const char *hwaddr);
1436 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1437 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1438 extern void dev_add_pack(struct packet_type *pt);
1439 extern void dev_remove_pack(struct packet_type *pt);
1440 extern void __dev_remove_pack(struct packet_type *pt);
1442 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1443 unsigned short mask);
1444 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1445 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1446 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1447 extern int dev_alloc_name(struct net_device *dev, const char *name);
1448 extern int dev_open(struct net_device *dev);
1449 extern int dev_close(struct net_device *dev);
1450 extern void dev_disable_lro(struct net_device *dev);
1451 extern int dev_queue_xmit(struct sk_buff *skb);
1452 extern int register_netdevice(struct net_device *dev);
1453 extern void unregister_netdevice_queue(struct net_device *dev,
1454 struct list_head *head);
1455 extern void unregister_netdevice_many(struct list_head *head);
1456 static inline void unregister_netdevice(struct net_device *dev)
1458 unregister_netdevice_queue(dev, NULL);
1461 extern int netdev_refcnt_read(const struct net_device *dev);
1462 extern void free_netdev(struct net_device *dev);
1463 extern void synchronize_net(void);
1464 extern int register_netdevice_notifier(struct notifier_block *nb);
1465 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1466 extern int init_dummy_netdev(struct net_device *dev);
1467 extern void netdev_resync_ops(struct net_device *dev);
1469 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1470 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1471 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1472 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1473 extern int dev_restart(struct net_device *dev);
1474 #ifdef CONFIG_NETPOLL_TRAP
1475 extern int netpoll_trap(void);
1477 extern int skb_gro_receive(struct sk_buff **head,
1478 struct sk_buff *skb);
1479 extern void skb_gro_reset_offset(struct sk_buff *skb);
1481 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1483 return NAPI_GRO_CB(skb)->data_offset;
1486 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1488 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1491 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1493 NAPI_GRO_CB(skb)->data_offset += len;
1496 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1497 unsigned int offset)
1499 return NAPI_GRO_CB(skb)->frag0 + offset;
1502 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1504 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1507 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1508 unsigned int offset)
1510 NAPI_GRO_CB(skb)->frag0 = NULL;
1511 NAPI_GRO_CB(skb)->frag0_len = 0;
1512 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1515 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1517 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1520 static inline void *skb_gro_network_header(struct sk_buff *skb)
1522 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1523 skb_network_offset(skb);
1526 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1527 unsigned short type,
1528 const void *daddr, const void *saddr,
1531 if (!dev->header_ops || !dev->header_ops->create)
1534 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1537 static inline int dev_parse_header(const struct sk_buff *skb,
1538 unsigned char *haddr)
1540 const struct net_device *dev = skb->dev;
1542 if (!dev->header_ops || !dev->header_ops->parse)
1544 return dev->header_ops->parse(skb, haddr);
1547 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1548 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1549 static inline int unregister_gifconf(unsigned int family)
1551 return register_gifconf(family, NULL);
1555 * Incoming packets are placed on per-cpu queues
1557 struct softnet_data {
1558 struct Qdisc *output_queue;
1559 struct Qdisc **output_queue_tailp;
1560 struct list_head poll_list;
1561 struct sk_buff *completion_queue;
1562 struct sk_buff_head process_queue;
1565 unsigned int processed;
1566 unsigned int time_squeeze;
1567 unsigned int cpu_collision;
1568 unsigned int received_rps;
1571 struct softnet_data *rps_ipi_list;
1573 /* Elements below can be accessed between CPUs for RPS */
1574 struct call_single_data csd ____cacheline_aligned_in_smp;
1575 struct softnet_data *rps_ipi_next;
1577 unsigned int input_queue_head;
1578 unsigned int input_queue_tail;
1581 struct sk_buff_head input_pkt_queue;
1582 struct napi_struct backlog;
1585 static inline void input_queue_head_incr(struct softnet_data *sd)
1588 sd->input_queue_head++;
1592 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1593 unsigned int *qtail)
1596 *qtail = ++sd->input_queue_tail;
1600 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1602 #define HAVE_NETIF_QUEUE
1604 extern void __netif_schedule(struct Qdisc *q);
1606 static inline void netif_schedule_queue(struct netdev_queue *txq)
1608 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1609 __netif_schedule(txq->qdisc);
1612 static inline void netif_tx_schedule_all(struct net_device *dev)
1616 for (i = 0; i < dev->num_tx_queues; i++)
1617 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1620 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1622 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1626 * netif_start_queue - allow transmit
1627 * @dev: network device
1629 * Allow upper layers to call the device hard_start_xmit routine.
1631 static inline void netif_start_queue(struct net_device *dev)
1633 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1636 static inline void netif_tx_start_all_queues(struct net_device *dev)
1640 for (i = 0; i < dev->num_tx_queues; i++) {
1641 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1642 netif_tx_start_queue(txq);
1646 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1648 #ifdef CONFIG_NETPOLL_TRAP
1649 if (netpoll_trap()) {
1650 netif_tx_start_queue(dev_queue);
1654 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1655 __netif_schedule(dev_queue->qdisc);
1659 * netif_wake_queue - restart transmit
1660 * @dev: network device
1662 * Allow upper layers to call the device hard_start_xmit routine.
1663 * Used for flow control when transmit resources are available.
1665 static inline void netif_wake_queue(struct net_device *dev)
1667 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1670 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1674 for (i = 0; i < dev->num_tx_queues; i++) {
1675 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1676 netif_tx_wake_queue(txq);
1680 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1682 if (WARN_ON(!dev_queue)) {
1683 printk(KERN_INFO "netif_stop_queue() cannot be called before "
1684 "register_netdev()");
1687 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1691 * netif_stop_queue - stop transmitted packets
1692 * @dev: network device
1694 * Stop upper layers calling the device hard_start_xmit routine.
1695 * Used for flow control when transmit resources are unavailable.
1697 static inline void netif_stop_queue(struct net_device *dev)
1699 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1702 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1706 for (i = 0; i < dev->num_tx_queues; i++) {
1707 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1708 netif_tx_stop_queue(txq);
1712 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1714 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1718 * netif_queue_stopped - test if transmit queue is flowblocked
1719 * @dev: network device
1721 * Test if transmit queue on device is currently unable to send.
1723 static inline int netif_queue_stopped(const struct net_device *dev)
1725 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1728 static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
1730 return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
1734 * netif_running - test if up
1735 * @dev: network device
1737 * Test if the device has been brought up.
1739 static inline int netif_running(const struct net_device *dev)
1741 return test_bit(__LINK_STATE_START, &dev->state);
1745 * Routines to manage the subqueues on a device. We only need start
1746 * stop, and a check if it's stopped. All other device management is
1747 * done at the overall netdevice level.
1748 * Also test the device if we're multiqueue.
1752 * netif_start_subqueue - allow sending packets on subqueue
1753 * @dev: network device
1754 * @queue_index: sub queue index
1756 * Start individual transmit queue of a device with multiple transmit queues.
1758 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1760 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1762 netif_tx_start_queue(txq);
1766 * netif_stop_subqueue - stop sending packets on subqueue
1767 * @dev: network device
1768 * @queue_index: sub queue index
1770 * Stop individual transmit queue of a device with multiple transmit queues.
1772 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1774 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1775 #ifdef CONFIG_NETPOLL_TRAP
1779 netif_tx_stop_queue(txq);
1783 * netif_subqueue_stopped - test status of subqueue
1784 * @dev: network device
1785 * @queue_index: sub queue index
1787 * Check individual transmit queue of a device with multiple transmit queues.
1789 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1792 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1794 return netif_tx_queue_stopped(txq);
1797 static inline int netif_subqueue_stopped(const struct net_device *dev,
1798 struct sk_buff *skb)
1800 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1804 * netif_wake_subqueue - allow sending packets on subqueue
1805 * @dev: network device
1806 * @queue_index: sub queue index
1808 * Resume individual transmit queue of a device with multiple transmit queues.
1810 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1812 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1813 #ifdef CONFIG_NETPOLL_TRAP
1817 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1818 __netif_schedule(txq->qdisc);
1822 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
1823 * as a distribution range limit for the returned value.
1825 static inline u16 skb_tx_hash(const struct net_device *dev,
1826 const struct sk_buff *skb)
1828 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
1832 * netif_is_multiqueue - test if device has multiple transmit queues
1833 * @dev: network device
1835 * Check if device has multiple transmit queues
1837 static inline int netif_is_multiqueue(const struct net_device *dev)
1839 return dev->num_tx_queues > 1;
1842 extern int netif_set_real_num_tx_queues(struct net_device *dev,
1846 extern int netif_set_real_num_rx_queues(struct net_device *dev,
1849 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
1856 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
1857 const struct net_device *from_dev)
1859 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
1861 return netif_set_real_num_rx_queues(to_dev,
1862 from_dev->real_num_rx_queues);
1868 /* Use this variant when it is known for sure that it
1869 * is executing from hardware interrupt context or with hardware interrupts
1872 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1874 /* Use this variant in places where it could be invoked
1875 * from either hardware interrupt or other context, with hardware interrupts
1876 * either disabled or enabled.
1878 extern void dev_kfree_skb_any(struct sk_buff *skb);
1880 #define HAVE_NETIF_RX 1
1881 extern int netif_rx(struct sk_buff *skb);
1882 extern int netif_rx_ni(struct sk_buff *skb);
1883 #define HAVE_NETIF_RECEIVE_SKB 1
1884 extern int netif_receive_skb(struct sk_buff *skb);
1885 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1886 struct sk_buff *skb);
1887 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1888 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1889 struct sk_buff *skb);
1890 extern void napi_gro_flush(struct napi_struct *napi);
1891 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1892 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1893 struct sk_buff *skb,
1895 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1896 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1898 static inline void napi_free_frags(struct napi_struct *napi)
1900 kfree_skb(napi->skb);
1904 extern int netdev_rx_handler_register(struct net_device *dev,
1905 rx_handler_func_t *rx_handler,
1906 void *rx_handler_data);
1907 extern void netdev_rx_handler_unregister(struct net_device *dev);
1909 extern int dev_valid_name(const char *name);
1910 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1911 extern int dev_ethtool(struct net *net, struct ifreq *);
1912 extern unsigned dev_get_flags(const struct net_device *);
1913 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1914 extern int dev_change_flags(struct net_device *, unsigned);
1915 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1916 extern int dev_change_name(struct net_device *, const char *);
1917 extern int dev_set_alias(struct net_device *, const char *, size_t);
1918 extern int dev_change_net_namespace(struct net_device *,
1919 struct net *, const char *);
1920 extern int dev_set_mtu(struct net_device *, int);
1921 extern void dev_set_group(struct net_device *, int);
1922 extern int dev_set_mac_address(struct net_device *,
1924 extern int dev_hard_start_xmit(struct sk_buff *skb,
1925 struct net_device *dev,
1926 struct netdev_queue *txq);
1927 extern int dev_forward_skb(struct net_device *dev,
1928 struct sk_buff *skb);
1930 extern int netdev_budget;
1932 /* Called by rtnetlink.c:rtnl_unlock() */
1933 extern void netdev_run_todo(void);
1936 * dev_put - release reference to device
1937 * @dev: network device
1939 * Release reference to device to allow it to be freed.
1941 static inline void dev_put(struct net_device *dev)
1943 irqsafe_cpu_dec(*dev->pcpu_refcnt);
1947 * dev_hold - get reference to device
1948 * @dev: network device
1950 * Hold reference to device to keep it from being freed.
1952 static inline void dev_hold(struct net_device *dev)
1954 irqsafe_cpu_inc(*dev->pcpu_refcnt);
1957 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1958 * and _off may be called from IRQ context, but it is caller
1959 * who is responsible for serialization of these calls.
1961 * The name carrier is inappropriate, these functions should really be
1962 * called netif_lowerlayer_*() because they represent the state of any
1963 * kind of lower layer not just hardware media.
1966 extern void linkwatch_fire_event(struct net_device *dev);
1967 extern void linkwatch_forget_dev(struct net_device *dev);
1970 * netif_carrier_ok - test if carrier present
1971 * @dev: network device
1973 * Check if carrier is present on device
1975 static inline int netif_carrier_ok(const struct net_device *dev)
1977 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1980 extern unsigned long dev_trans_start(struct net_device *dev);
1982 extern void __netdev_watchdog_up(struct net_device *dev);
1984 extern void netif_carrier_on(struct net_device *dev);
1986 extern void netif_carrier_off(struct net_device *dev);
1988 extern void netif_notify_peers(struct net_device *dev);
1991 * netif_dormant_on - mark device as dormant.
1992 * @dev: network device
1994 * Mark device as dormant (as per RFC2863).
1996 * The dormant state indicates that the relevant interface is not
1997 * actually in a condition to pass packets (i.e., it is not 'up') but is
1998 * in a "pending" state, waiting for some external event. For "on-
1999 * demand" interfaces, this new state identifies the situation where the
2000 * interface is waiting for events to place it in the up state.
2003 static inline void netif_dormant_on(struct net_device *dev)
2005 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2006 linkwatch_fire_event(dev);
2010 * netif_dormant_off - set device as not dormant.
2011 * @dev: network device
2013 * Device is not in dormant state.
2015 static inline void netif_dormant_off(struct net_device *dev)
2017 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2018 linkwatch_fire_event(dev);
2022 * netif_dormant - test if carrier present
2023 * @dev: network device
2025 * Check if carrier is present on device
2027 static inline int netif_dormant(const struct net_device *dev)
2029 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2034 * netif_oper_up - test if device is operational
2035 * @dev: network device
2037 * Check if carrier is operational
2039 static inline int netif_oper_up(const struct net_device *dev)
2041 return (dev->operstate == IF_OPER_UP ||
2042 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2046 * netif_device_present - is device available or removed
2047 * @dev: network device
2049 * Check if device has not been removed from system.
2051 static inline int netif_device_present(struct net_device *dev)
2053 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2056 extern void netif_device_detach(struct net_device *dev);
2058 extern void netif_device_attach(struct net_device *dev);
2061 * Network interface message level settings
2063 #define HAVE_NETIF_MSG 1
2066 NETIF_MSG_DRV = 0x0001,
2067 NETIF_MSG_PROBE = 0x0002,
2068 NETIF_MSG_LINK = 0x0004,
2069 NETIF_MSG_TIMER = 0x0008,
2070 NETIF_MSG_IFDOWN = 0x0010,
2071 NETIF_MSG_IFUP = 0x0020,
2072 NETIF_MSG_RX_ERR = 0x0040,
2073 NETIF_MSG_TX_ERR = 0x0080,
2074 NETIF_MSG_TX_QUEUED = 0x0100,
2075 NETIF_MSG_INTR = 0x0200,
2076 NETIF_MSG_TX_DONE = 0x0400,
2077 NETIF_MSG_RX_STATUS = 0x0800,
2078 NETIF_MSG_PKTDATA = 0x1000,
2079 NETIF_MSG_HW = 0x2000,
2080 NETIF_MSG_WOL = 0x4000,
2083 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2084 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2085 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2086 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2087 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2088 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2089 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2090 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2091 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2092 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2093 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2094 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2095 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2096 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2097 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2099 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2102 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2103 return default_msg_enable_bits;
2104 if (debug_value == 0) /* no output */
2106 /* set low N bits */
2107 return (1 << debug_value) - 1;
2110 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2112 spin_lock(&txq->_xmit_lock);
2113 txq->xmit_lock_owner = cpu;
2116 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2118 spin_lock_bh(&txq->_xmit_lock);
2119 txq->xmit_lock_owner = smp_processor_id();
2122 static inline int __netif_tx_trylock(struct netdev_queue *txq)
2124 int ok = spin_trylock(&txq->_xmit_lock);
2126 txq->xmit_lock_owner = smp_processor_id();
2130 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2132 txq->xmit_lock_owner = -1;
2133 spin_unlock(&txq->_xmit_lock);
2136 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2138 txq->xmit_lock_owner = -1;
2139 spin_unlock_bh(&txq->_xmit_lock);
2142 static inline void txq_trans_update(struct netdev_queue *txq)
2144 if (txq->xmit_lock_owner != -1)
2145 txq->trans_start = jiffies;
2149 * netif_tx_lock - grab network device transmit lock
2150 * @dev: network device
2152 * Get network device transmit lock
2154 static inline void netif_tx_lock(struct net_device *dev)
2159 spin_lock(&dev->tx_global_lock);
2160 cpu = smp_processor_id();
2161 for (i = 0; i < dev->num_tx_queues; i++) {
2162 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2164 /* We are the only thread of execution doing a
2165 * freeze, but we have to grab the _xmit_lock in
2166 * order to synchronize with threads which are in
2167 * the ->hard_start_xmit() handler and already
2168 * checked the frozen bit.
2170 __netif_tx_lock(txq, cpu);
2171 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2172 __netif_tx_unlock(txq);
2176 static inline void netif_tx_lock_bh(struct net_device *dev)
2182 static inline void netif_tx_unlock(struct net_device *dev)
2186 for (i = 0; i < dev->num_tx_queues; i++) {
2187 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2189 /* No need to grab the _xmit_lock here. If the
2190 * queue is not stopped for another reason, we
2193 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2194 netif_schedule_queue(txq);
2196 spin_unlock(&dev->tx_global_lock);
2199 static inline void netif_tx_unlock_bh(struct net_device *dev)
2201 netif_tx_unlock(dev);
2205 #define HARD_TX_LOCK(dev, txq, cpu) { \
2206 if ((dev->features & NETIF_F_LLTX) == 0) { \
2207 __netif_tx_lock(txq, cpu); \
2211 #define HARD_TX_UNLOCK(dev, txq) { \
2212 if ((dev->features & NETIF_F_LLTX) == 0) { \
2213 __netif_tx_unlock(txq); \
2217 static inline void netif_tx_disable(struct net_device *dev)
2223 cpu = smp_processor_id();
2224 for (i = 0; i < dev->num_tx_queues; i++) {
2225 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2227 __netif_tx_lock(txq, cpu);
2228 netif_tx_stop_queue(txq);
2229 __netif_tx_unlock(txq);
2234 static inline void netif_addr_lock(struct net_device *dev)
2236 spin_lock(&dev->addr_list_lock);
2239 static inline void netif_addr_lock_bh(struct net_device *dev)
2241 spin_lock_bh(&dev->addr_list_lock);
2244 static inline void netif_addr_unlock(struct net_device *dev)
2246 spin_unlock(&dev->addr_list_lock);
2249 static inline void netif_addr_unlock_bh(struct net_device *dev)
2251 spin_unlock_bh(&dev->addr_list_lock);
2255 * dev_addrs walker. Should be used only for read access. Call with
2256 * rcu_read_lock held.
2258 #define for_each_dev_addr(dev, ha) \
2259 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2261 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2263 extern void ether_setup(struct net_device *dev);
2265 /* Support for loadable net-drivers */
2266 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2267 void (*setup)(struct net_device *),
2268 unsigned int txqs, unsigned int rxqs);
2269 #define alloc_netdev(sizeof_priv, name, setup) \
2270 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2272 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2273 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2275 extern int register_netdev(struct net_device *dev);
2276 extern void unregister_netdev(struct net_device *dev);
2278 /* General hardware address lists handling functions */
2279 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2280 struct netdev_hw_addr_list *from_list,
2281 int addr_len, unsigned char addr_type);
2282 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2283 struct netdev_hw_addr_list *from_list,
2284 int addr_len, unsigned char addr_type);
2285 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2286 struct netdev_hw_addr_list *from_list,
2288 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2289 struct netdev_hw_addr_list *from_list,
2291 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2292 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2294 /* Functions used for device addresses handling */
2295 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2296 unsigned char addr_type);
2297 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2298 unsigned char addr_type);
2299 extern int dev_addr_add_multiple(struct net_device *to_dev,
2300 struct net_device *from_dev,
2301 unsigned char addr_type);
2302 extern int dev_addr_del_multiple(struct net_device *to_dev,
2303 struct net_device *from_dev,
2304 unsigned char addr_type);
2305 extern void dev_addr_flush(struct net_device *dev);
2306 extern int dev_addr_init(struct net_device *dev);
2308 /* Functions used for unicast addresses handling */
2309 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2310 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2311 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2312 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2313 extern void dev_uc_flush(struct net_device *dev);
2314 extern void dev_uc_init(struct net_device *dev);
2316 /* Functions used for multicast addresses handling */
2317 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2318 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2319 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2320 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2321 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2322 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2323 extern void dev_mc_flush(struct net_device *dev);
2324 extern void dev_mc_init(struct net_device *dev);
2326 /* Functions used for secondary unicast and multicast support */
2327 extern void dev_set_rx_mode(struct net_device *dev);
2328 extern void __dev_set_rx_mode(struct net_device *dev);
2329 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2330 extern int dev_set_allmulti(struct net_device *dev, int inc);
2331 extern void netdev_state_change(struct net_device *dev);
2332 extern int netdev_bonding_change(struct net_device *dev,
2333 unsigned long event);
2334 extern void netdev_features_change(struct net_device *dev);
2335 /* Load a device via the kmod */
2336 extern void dev_load(struct net *net, const char *name);
2337 extern void dev_mcast_init(void);
2338 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2339 struct rtnl_link_stats64 *storage);
2341 extern int netdev_max_backlog;
2342 extern int netdev_tstamp_prequeue;
2343 extern int weight_p;
2344 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2345 extern int skb_checksum_help(struct sk_buff *skb);
2346 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2348 extern void netdev_rx_csum_fault(struct net_device *dev);
2350 static inline void netdev_rx_csum_fault(struct net_device *dev)
2354 /* rx skb timestamps */
2355 extern void net_enable_timestamp(void);
2356 extern void net_disable_timestamp(void);
2358 #ifdef CONFIG_PROC_FS
2359 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2360 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2361 extern void dev_seq_stop(struct seq_file *seq, void *v);
2364 extern int netdev_class_create_file(struct class_attribute *class_attr);
2365 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2367 extern struct kobj_ns_type_operations net_ns_type_operations;
2369 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2371 extern void linkwatch_run_queue(void);
2373 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2374 unsigned long mask);
2375 unsigned long netdev_fix_features(unsigned long features, const char *name);
2377 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2378 struct net_device *dev);
2380 int netif_skb_features(struct sk_buff *skb);
2382 static inline int net_gso_ok(int features, int gso_type)
2384 int feature = gso_type << NETIF_F_GSO_SHIFT;
2385 return (features & feature) == feature;
2388 static inline int skb_gso_ok(struct sk_buff *skb, int features)
2390 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2391 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2394 static inline int netif_needs_gso(struct sk_buff *skb, int features)
2396 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2397 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2400 static inline void netif_set_gso_max_size(struct net_device *dev,
2403 dev->gso_max_size = size;
2406 extern int __skb_bond_should_drop(struct sk_buff *skb,
2407 struct net_device *master);
2409 static inline int skb_bond_should_drop(struct sk_buff *skb,
2410 struct net_device *master)
2413 return __skb_bond_should_drop(skb, master);
2417 extern struct pernet_operations __net_initdata loopback_net_ops;
2419 static inline int dev_ethtool_get_settings(struct net_device *dev,
2420 struct ethtool_cmd *cmd)
2422 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2424 return dev->ethtool_ops->get_settings(dev, cmd);
2427 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2429 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2431 return dev->ethtool_ops->get_rx_csum(dev);
2434 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2436 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2438 return dev->ethtool_ops->get_flags(dev);
2441 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2443 /* netdev_printk helpers, similar to dev_printk */
2445 static inline const char *netdev_name(const struct net_device *dev)
2447 if (dev->reg_state != NETREG_REGISTERED)
2448 return "(unregistered net_device)";
2452 extern int netdev_printk(const char *level, const struct net_device *dev,
2453 const char *format, ...)
2454 __attribute__ ((format (printf, 3, 4)));
2455 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2456 __attribute__ ((format (printf, 2, 3)));
2457 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2458 __attribute__ ((format (printf, 2, 3)));
2459 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2460 __attribute__ ((format (printf, 2, 3)));
2461 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2462 __attribute__ ((format (printf, 2, 3)));
2463 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2464 __attribute__ ((format (printf, 2, 3)));
2465 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2466 __attribute__ ((format (printf, 2, 3)));
2467 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2468 __attribute__ ((format (printf, 2, 3)));
2471 #define netdev_dbg(__dev, format, args...) \
2472 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2473 #elif defined(CONFIG_DYNAMIC_DEBUG)
2474 #define netdev_dbg(__dev, format, args...) \
2476 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2477 netdev_name(__dev), ##args); \
2480 #define netdev_dbg(__dev, format, args...) \
2483 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2488 #if defined(VERBOSE_DEBUG)
2489 #define netdev_vdbg netdev_dbg
2492 #define netdev_vdbg(dev, format, args...) \
2495 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2501 * netdev_WARN() acts like dev_printk(), but with the key difference
2502 * of using a WARN/WARN_ON to get the message out, including the
2503 * file/line information and a backtrace.
2505 #define netdev_WARN(dev, format, args...) \
2506 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2508 /* netif printk helpers, similar to netdev_printk */
2510 #define netif_printk(priv, type, level, dev, fmt, args...) \
2512 if (netif_msg_##type(priv)) \
2513 netdev_printk(level, (dev), fmt, ##args); \
2516 #define netif_level(level, priv, type, dev, fmt, args...) \
2518 if (netif_msg_##type(priv)) \
2519 netdev_##level(dev, fmt, ##args); \
2522 #define netif_emerg(priv, type, dev, fmt, args...) \
2523 netif_level(emerg, priv, type, dev, fmt, ##args)
2524 #define netif_alert(priv, type, dev, fmt, args...) \
2525 netif_level(alert, priv, type, dev, fmt, ##args)
2526 #define netif_crit(priv, type, dev, fmt, args...) \
2527 netif_level(crit, priv, type, dev, fmt, ##args)
2528 #define netif_err(priv, type, dev, fmt, args...) \
2529 netif_level(err, priv, type, dev, fmt, ##args)
2530 #define netif_warn(priv, type, dev, fmt, args...) \
2531 netif_level(warn, priv, type, dev, fmt, ##args)
2532 #define netif_notice(priv, type, dev, fmt, args...) \
2533 netif_level(notice, priv, type, dev, fmt, ##args)
2534 #define netif_info(priv, type, dev, fmt, args...) \
2535 netif_level(info, priv, type, dev, fmt, ##args)
2538 #define netif_dbg(priv, type, dev, format, args...) \
2539 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2540 #elif defined(CONFIG_DYNAMIC_DEBUG)
2541 #define netif_dbg(priv, type, netdev, format, args...) \
2543 if (netif_msg_##type(priv)) \
2544 dynamic_dev_dbg((netdev)->dev.parent, \
2546 netdev_name(netdev), ##args); \
2549 #define netif_dbg(priv, type, dev, format, args...) \
2552 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2557 #if defined(VERBOSE_DEBUG)
2558 #define netif_vdbg netif_dbg
2560 #define netif_vdbg(priv, type, dev, format, args...) \
2563 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2568 #endif /* __KERNEL__ */
2570 #endif /* _LINUX_NETDEVICE_H */