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 */
79 * Transmit return codes: transmit return codes originate from three different
82 * - qdisc return codes
83 * - driver transmit return codes
86 * Drivers are allowed to return any one of those in their hard_start_xmit()
87 * function. Real network devices commonly used with qdiscs should only return
88 * the driver transmit return codes though - when qdiscs are used, the actual
89 * transmission happens asynchronously, so the value is not propagated to
90 * higher layers. Virtual network devices transmit synchronously, in this case
91 * the driver transmit return codes are consumed by dev_queue_xmit(), all
92 * others are propagated to higher layers.
95 /* qdisc ->enqueue() return codes. */
96 #define NET_XMIT_SUCCESS 0x00
97 #define NET_XMIT_DROP 0x01 /* skb dropped */
98 #define NET_XMIT_CN 0x02 /* congestion notification */
99 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
100 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
102 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
103 * indicates that the device will soon be dropping packets, or already drops
104 * some packets of the same priority; prompting us to send less aggressively. */
105 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
106 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
108 /* Driver transmit return codes */
109 #define NETDEV_TX_MASK 0xf0
112 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
113 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
114 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
115 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
117 typedef enum netdev_tx netdev_tx_t
;
120 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
121 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
123 static inline bool dev_xmit_complete(int rc
)
126 * Positive cases with an skb consumed by a driver:
127 * - successful transmission (rc == NETDEV_TX_OK)
128 * - error while transmitting (rc < 0)
129 * - error while queueing to a different device (rc & NET_XMIT_MASK)
131 if (likely(rc
< NET_XMIT_MASK
))
139 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
143 * Compute the worst case header length according to the protocols
147 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
148 # if defined(CONFIG_MAC80211_MESH)
149 # define LL_MAX_HEADER 128
151 # define LL_MAX_HEADER 96
153 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
154 # define LL_MAX_HEADER 48
156 # define LL_MAX_HEADER 32
159 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
160 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
161 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
162 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
163 #define MAX_HEADER LL_MAX_HEADER
165 #define MAX_HEADER (LL_MAX_HEADER + 48)
169 * Old network device statistics. Fields are native words
170 * (unsigned long) so they can be read and written atomically.
173 struct net_device_stats
{
174 unsigned long rx_packets
;
175 unsigned long tx_packets
;
176 unsigned long rx_bytes
;
177 unsigned long tx_bytes
;
178 unsigned long rx_errors
;
179 unsigned long tx_errors
;
180 unsigned long rx_dropped
;
181 unsigned long tx_dropped
;
182 unsigned long multicast
;
183 unsigned long collisions
;
184 unsigned long rx_length_errors
;
185 unsigned long rx_over_errors
;
186 unsigned long rx_crc_errors
;
187 unsigned long rx_frame_errors
;
188 unsigned long rx_fifo_errors
;
189 unsigned long rx_missed_errors
;
190 unsigned long tx_aborted_errors
;
191 unsigned long tx_carrier_errors
;
192 unsigned long tx_fifo_errors
;
193 unsigned long tx_heartbeat_errors
;
194 unsigned long tx_window_errors
;
195 unsigned long rx_compressed
;
196 unsigned long tx_compressed
;
199 #endif /* __KERNEL__ */
202 /* Media selection options. */
215 #include <linux/cache.h>
216 #include <linux/skbuff.h>
222 struct netdev_hw_addr
{
223 struct list_head list
;
224 unsigned char addr
[MAX_ADDR_LEN
];
226 #define NETDEV_HW_ADDR_T_LAN 1
227 #define NETDEV_HW_ADDR_T_SAN 2
228 #define NETDEV_HW_ADDR_T_SLAVE 3
229 #define NETDEV_HW_ADDR_T_UNICAST 4
230 #define NETDEV_HW_ADDR_T_MULTICAST 5
234 struct rcu_head rcu_head
;
237 struct netdev_hw_addr_list
{
238 struct list_head list
;
242 #define netdev_hw_addr_list_count(l) ((l)->count)
243 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
244 #define netdev_hw_addr_list_for_each(ha, l) \
245 list_for_each_entry(ha, &(l)->list, list)
247 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
248 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
249 #define netdev_for_each_uc_addr(ha, dev) \
250 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
252 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
253 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
254 #define netdev_for_each_mc_addr(ha, dev) \
255 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
258 struct hh_cache
*hh_next
; /* Next entry */
259 atomic_t hh_refcnt
; /* number of users */
261 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
263 * They are mostly read, but hh_refcnt may be changed quite frequently,
264 * incurring cache line ping pongs.
266 __be16 hh_type ____cacheline_aligned_in_smp
;
267 /* protocol identifier, f.e ETH_P_IP
268 * NOTE: For VLANs, this will be the
269 * encapuslated type. --BLG
271 u16 hh_len
; /* length of header */
272 int (*hh_output
)(struct sk_buff
*skb
);
275 /* cached hardware header; allow for machine alignment needs. */
276 #define HH_DATA_MOD 16
277 #define HH_DATA_OFF(__len) \
278 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
279 #define HH_DATA_ALIGN(__len) \
280 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
281 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
284 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
286 * dev->hard_header_len ? (dev->hard_header_len +
287 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
289 * We could use other alignment values, but we must maintain the
290 * relationship HH alignment <= LL alignment.
292 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
295 #define LL_RESERVED_SPACE(dev) \
296 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
297 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
298 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
299 #define LL_ALLOCATED_SPACE(dev) \
300 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
303 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
304 unsigned short type
, const void *daddr
,
305 const void *saddr
, unsigned len
);
306 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
307 int (*rebuild
)(struct sk_buff
*skb
);
308 #define HAVE_HEADER_CACHE
309 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
310 void (*cache_update
)(struct hh_cache
*hh
,
311 const struct net_device
*dev
,
312 const unsigned char *haddr
);
315 /* These flag bits are private to the generic network queueing
316 * layer, they may not be explicitly referenced by any other
320 enum netdev_state_t
{
322 __LINK_STATE_PRESENT
,
323 __LINK_STATE_NOCARRIER
,
324 __LINK_STATE_LINKWATCH_PENDING
,
325 __LINK_STATE_DORMANT
,
330 * This structure holds at boot time configured netdevice settings. They
331 * are then used in the device probing.
333 struct netdev_boot_setup
{
337 #define NETDEV_BOOT_SETUP_MAX 8
339 extern int __init
netdev_boot_setup(char *str
);
342 * Structure for NAPI scheduling similar to tasklet but with weighting
345 /* The poll_list must only be managed by the entity which
346 * changes the state of the NAPI_STATE_SCHED bit. This means
347 * whoever atomically sets that bit can add this napi_struct
348 * to the per-cpu poll_list, and whoever clears that bit
349 * can remove from the list right before clearing the bit.
351 struct list_head poll_list
;
355 int (*poll
)(struct napi_struct
*, int);
356 #ifdef CONFIG_NETPOLL
357 spinlock_t poll_lock
;
361 unsigned int gro_count
;
363 struct net_device
*dev
;
364 struct list_head dev_list
;
365 struct sk_buff
*gro_list
;
370 NAPI_STATE_SCHED
, /* Poll is scheduled */
371 NAPI_STATE_DISABLE
, /* Disable pending */
372 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
382 typedef enum gro_result gro_result_t
;
384 typedef struct sk_buff
*rx_handler_func_t(struct sk_buff
*skb
);
386 extern void __napi_schedule(struct napi_struct
*n
);
388 static inline int napi_disable_pending(struct napi_struct
*n
)
390 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
394 * napi_schedule_prep - check if napi can be scheduled
397 * Test if NAPI routine is already running, and if not mark
398 * it as running. This is used as a condition variable
399 * insure only one NAPI poll instance runs. We also make
400 * sure there is no pending NAPI disable.
402 static inline int napi_schedule_prep(struct napi_struct
*n
)
404 return !napi_disable_pending(n
) &&
405 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
409 * napi_schedule - schedule NAPI poll
412 * Schedule NAPI poll routine to be called if it is not already
415 static inline void napi_schedule(struct napi_struct
*n
)
417 if (napi_schedule_prep(n
))
421 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
422 static inline int napi_reschedule(struct napi_struct
*napi
)
424 if (napi_schedule_prep(napi
)) {
425 __napi_schedule(napi
);
432 * napi_complete - NAPI processing complete
435 * Mark NAPI processing as complete.
437 extern void __napi_complete(struct napi_struct
*n
);
438 extern void napi_complete(struct napi_struct
*n
);
441 * napi_disable - prevent NAPI from scheduling
444 * Stop NAPI from being scheduled on this context.
445 * Waits till any outstanding processing completes.
447 static inline void napi_disable(struct napi_struct
*n
)
449 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
450 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
452 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
456 * napi_enable - enable NAPI scheduling
459 * Resume NAPI from being scheduled on this context.
460 * Must be paired with napi_disable.
462 static inline void napi_enable(struct napi_struct
*n
)
464 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
465 smp_mb__before_clear_bit();
466 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
471 * napi_synchronize - wait until NAPI is not running
474 * Wait until NAPI is done being scheduled on this context.
475 * Waits till any outstanding processing completes but
476 * does not disable future activations.
478 static inline void napi_synchronize(const struct napi_struct
*n
)
480 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
484 # define napi_synchronize(n) barrier()
487 enum netdev_queue_state_t
{
489 __QUEUE_STATE_FROZEN
,
492 struct netdev_queue
{
496 struct net_device
*dev
;
499 struct Qdisc
*qdisc_sleeping
;
503 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
506 * please use this field instead of dev->trans_start
508 unsigned long trans_start
;
512 } ____cacheline_aligned_in_smp
;
516 * This structure holds an RPS map which can be of variable length. The
517 * map is an array of CPUs.
524 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
527 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
528 * tail pointer for that CPU's input queue at the time of last enqueue.
530 struct rps_dev_flow
{
533 unsigned int last_qtail
;
537 * The rps_dev_flow_table structure contains a table of flow mappings.
539 struct rps_dev_flow_table
{
542 struct work_struct free_work
;
543 struct rps_dev_flow flows
[0];
545 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
546 (_num * sizeof(struct rps_dev_flow)))
549 * The rps_sock_flow_table contains mappings of flows to the last CPU
550 * on which they were processed by the application (set in recvmsg).
552 struct rps_sock_flow_table
{
556 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
557 (_num * sizeof(u16)))
559 #define RPS_NO_CPU 0xffff
561 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
565 unsigned int cpu
, index
= hash
& table
->mask
;
567 /* We only give a hint, preemption can change cpu under us */
568 cpu
= raw_smp_processor_id();
570 if (table
->ents
[index
] != cpu
)
571 table
->ents
[index
] = cpu
;
575 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
579 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
582 extern struct rps_sock_flow_table
*rps_sock_flow_table
;
584 /* This structure contains an instance of an RX queue. */
585 struct netdev_rx_queue
{
586 struct rps_map
*rps_map
;
587 struct rps_dev_flow_table
*rps_flow_table
;
589 struct netdev_rx_queue
*first
;
591 } ____cacheline_aligned_in_smp
;
592 #endif /* CONFIG_RPS */
595 * This structure defines the management hooks for network devices.
596 * The following hooks can be defined; unless noted otherwise, they are
597 * optional and can be filled with a null pointer.
599 * int (*ndo_init)(struct net_device *dev);
600 * This function is called once when network device is registered.
601 * The network device can use this to any late stage initializaton
602 * or semantic validattion. It can fail with an error code which will
603 * be propogated back to register_netdev
605 * void (*ndo_uninit)(struct net_device *dev);
606 * This function is called when device is unregistered or when registration
607 * fails. It is not called if init fails.
609 * int (*ndo_open)(struct net_device *dev);
610 * This function is called when network device transistions to the up
613 * int (*ndo_stop)(struct net_device *dev);
614 * This function is called when network device transistions to the down
617 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
618 * struct net_device *dev);
619 * Called when a packet needs to be transmitted.
620 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
621 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
622 * Required can not be NULL.
624 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
625 * Called to decide which queue to when device supports multiple
628 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
629 * This function is called to allow device receiver to make
630 * changes to configuration when multicast or promiscious is enabled.
632 * void (*ndo_set_rx_mode)(struct net_device *dev);
633 * This function is called device changes address list filtering.
635 * void (*ndo_set_multicast_list)(struct net_device *dev);
636 * This function is called when the multicast address list changes.
638 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
639 * This function is called when the Media Access Control address
640 * needs to be changed. If this interface is not defined, the
641 * mac address can not be changed.
643 * int (*ndo_validate_addr)(struct net_device *dev);
644 * Test if Media Access Control address is valid for the device.
646 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
647 * Called when a user request an ioctl which can't be handled by
648 * the generic interface code. If not defined ioctl's return
649 * not supported error code.
651 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
652 * Used to set network devices bus interface parameters. This interface
653 * is retained for legacy reason, new devices should use the bus
654 * interface (PCI) for low level management.
656 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
657 * Called when a user wants to change the Maximum Transfer Unit
658 * of a device. If not defined, any request to change MTU will
659 * will return an error.
661 * void (*ndo_tx_timeout)(struct net_device *dev);
662 * Callback uses when the transmitter has not made any progress
663 * for dev->watchdog ticks.
665 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
666 * struct rtnl_link_stats64 *storage);
667 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
668 * Called when a user wants to get the network device usage
669 * statistics. Drivers must do one of the following:
670 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
671 * rtnl_link_stats64 structure passed by the caller.
672 * 2. Define @ndo_get_stats to update a net_device_stats structure
673 * (which should normally be dev->stats) and return a pointer to
674 * it. The structure may be changed asynchronously only if each
675 * field is written atomically.
676 * 3. Update dev->stats asynchronously and atomically, and define
679 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
680 * If device support VLAN receive accleration
681 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
682 * when vlan groups for the device changes. Note: grp is NULL
683 * if no vlan's groups are being used.
685 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
686 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
687 * this function is called when a VLAN id is registered.
689 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
690 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
691 * this function is called when a VLAN id is unregistered.
693 * void (*ndo_poll_controller)(struct net_device *dev);
695 * SR-IOV management functions.
696 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
697 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
698 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
699 * int (*ndo_get_vf_config)(struct net_device *dev,
700 * int vf, struct ifla_vf_info *ivf);
701 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
702 * struct nlattr *port[]);
703 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
705 #define HAVE_NET_DEVICE_OPS
706 struct net_device_ops
{
707 int (*ndo_init
)(struct net_device
*dev
);
708 void (*ndo_uninit
)(struct net_device
*dev
);
709 int (*ndo_open
)(struct net_device
*dev
);
710 int (*ndo_stop
)(struct net_device
*dev
);
711 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
712 struct net_device
*dev
);
713 u16 (*ndo_select_queue
)(struct net_device
*dev
,
714 struct sk_buff
*skb
);
715 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
717 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
718 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
719 int (*ndo_set_mac_address
)(struct net_device
*dev
,
721 int (*ndo_validate_addr
)(struct net_device
*dev
);
722 int (*ndo_do_ioctl
)(struct net_device
*dev
,
723 struct ifreq
*ifr
, int cmd
);
724 int (*ndo_set_config
)(struct net_device
*dev
,
726 int (*ndo_change_mtu
)(struct net_device
*dev
,
728 int (*ndo_neigh_setup
)(struct net_device
*dev
,
729 struct neigh_parms
*);
730 void (*ndo_tx_timeout
) (struct net_device
*dev
);
732 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
733 struct rtnl_link_stats64
*storage
);
734 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
736 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
737 struct vlan_group
*grp
);
738 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
740 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
742 #ifdef CONFIG_NET_POLL_CONTROLLER
743 void (*ndo_poll_controller
)(struct net_device
*dev
);
744 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
745 struct netpoll_info
*info
);
746 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
748 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
750 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
751 int queue
, u16 vlan
, u8 qos
);
752 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
754 int (*ndo_get_vf_config
)(struct net_device
*dev
,
756 struct ifla_vf_info
*ivf
);
757 int (*ndo_set_vf_port
)(struct net_device
*dev
,
759 struct nlattr
*port
[]);
760 int (*ndo_get_vf_port
)(struct net_device
*dev
,
761 int vf
, struct sk_buff
*skb
);
762 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
763 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
764 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
765 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
767 struct scatterlist
*sgl
,
769 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
771 #define NETDEV_FCOE_WWNN 0
772 #define NETDEV_FCOE_WWPN 1
773 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
779 * The DEVICE structure.
780 * Actually, this whole structure is a big mistake. It mixes I/O
781 * data with strictly "high-level" data, and it has to know about
782 * almost every data structure used in the INET module.
784 * FIXME: cleanup struct net_device such that network protocol info
791 * This is the first field of the "visible" part of this structure
792 * (i.e. as seen by users in the "Space.c" file). It is the name
797 struct pm_qos_request_list pm_qos_req
;
799 /* device name hash chain */
800 struct hlist_node name_hlist
;
805 * I/O specific fields
806 * FIXME: Merge these and struct ifmap into one
808 unsigned long mem_end
; /* shared mem end */
809 unsigned long mem_start
; /* shared mem start */
810 unsigned long base_addr
; /* device I/O address */
811 unsigned int irq
; /* device IRQ number */
814 * Some hardware also needs these fields, but they are not
815 * part of the usual set specified in Space.c.
818 unsigned char if_port
; /* Selectable AUI, TP,..*/
819 unsigned char dma
; /* DMA channel */
823 struct list_head dev_list
;
824 struct list_head napi_list
;
825 struct list_head unreg_list
;
827 /* Net device features */
828 unsigned long features
;
829 #define NETIF_F_SG 1 /* Scatter/gather IO. */
830 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
831 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
832 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
833 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
834 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
835 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
836 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
837 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
838 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
839 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
840 #define NETIF_F_GSO 2048 /* Enable software GSO. */
841 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
842 /* do not use LLTX in new drivers */
843 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
844 #define NETIF_F_GRO 16384 /* Generic receive offload */
845 #define NETIF_F_LRO 32768 /* large receive offload */
847 /* the GSO_MASK reserves bits 16 through 23 */
848 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
849 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
850 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
851 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
852 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
854 /* Segmentation offload features */
855 #define NETIF_F_GSO_SHIFT 16
856 #define NETIF_F_GSO_MASK 0x00ff0000
857 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
858 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
859 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
860 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
861 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
862 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
864 /* List of features with software fallbacks. */
865 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
866 NETIF_F_TSO6 | NETIF_F_UFO)
869 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
870 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
871 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
872 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
875 * If one device supports one of these features, then enable them
876 * for all in netdev_increment_features.
878 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
879 NETIF_F_SG | NETIF_F_HIGHDMA | \
882 /* Interface index. Unique device identifier */
886 struct net_device_stats stats
;
888 #ifdef CONFIG_WIRELESS_EXT
889 /* List of functions to handle Wireless Extensions (instead of ioctl).
890 * See <net/iw_handler.h> for details. Jean II */
891 const struct iw_handler_def
* wireless_handlers
;
892 /* Instance data managed by the core of Wireless Extensions. */
893 struct iw_public_data
* wireless_data
;
895 /* Management operations */
896 const struct net_device_ops
*netdev_ops
;
897 const struct ethtool_ops
*ethtool_ops
;
899 /* Hardware header description */
900 const struct header_ops
*header_ops
;
902 unsigned int flags
; /* interface flags (a la BSD) */
903 unsigned short gflags
;
904 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
905 unsigned short padded
; /* How much padding added by alloc_netdev() */
907 unsigned char operstate
; /* RFC2863 operstate */
908 unsigned char link_mode
; /* mapping policy to operstate */
910 unsigned int mtu
; /* interface MTU value */
911 unsigned short type
; /* interface hardware type */
912 unsigned short hard_header_len
; /* hardware hdr length */
914 /* extra head- and tailroom the hardware may need, but not in all cases
915 * can this be guaranteed, especially tailroom. Some cases also use
916 * LL_MAX_HEADER instead to allocate the skb.
918 unsigned short needed_headroom
;
919 unsigned short needed_tailroom
;
921 struct net_device
*master
; /* Pointer to master device of a group,
922 * which this device is member of.
925 /* Interface address info. */
926 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
927 unsigned char addr_assign_type
; /* hw address assignment type */
928 unsigned char addr_len
; /* hardware address length */
929 unsigned short dev_id
; /* for shared network cards */
931 spinlock_t addr_list_lock
;
932 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
933 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
935 unsigned int promiscuity
;
936 unsigned int allmulti
;
939 /* Protocol specific pointers */
941 #ifdef CONFIG_NET_DSA
942 void *dsa_ptr
; /* dsa specific data */
944 void *atalk_ptr
; /* AppleTalk link */
945 void *ip_ptr
; /* IPv4 specific data */
946 void *dn_ptr
; /* DECnet specific data */
947 void *ip6_ptr
; /* IPv6 specific data */
948 void *ec_ptr
; /* Econet specific data */
949 void *ax25_ptr
; /* AX.25 specific data */
950 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
951 assign before registering */
954 * Cache line mostly used on receive path (including eth_type_trans())
956 unsigned long last_rx
; /* Time of last Rx */
957 /* Interface address info used in eth_type_trans() */
958 unsigned char *dev_addr
; /* hw address, (before bcast
959 because most packets are
962 struct netdev_hw_addr_list dev_addrs
; /* list of device
965 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
968 struct kset
*queues_kset
;
970 struct netdev_rx_queue
*_rx
;
972 /* Number of RX queues allocated at alloc_netdev_mq() time */
973 unsigned int num_rx_queues
;
976 struct netdev_queue rx_queue
;
977 rx_handler_func_t
*rx_handler
;
978 void *rx_handler_data
;
980 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
982 /* Number of TX queues allocated at alloc_netdev_mq() time */
983 unsigned int num_tx_queues
;
985 /* Number of TX queues currently active in device */
986 unsigned int real_num_tx_queues
;
988 /* root qdisc from userspace point of view */
991 unsigned long tx_queue_len
; /* Max frames per queue allowed */
992 spinlock_t tx_global_lock
;
994 * One part is mostly used on xmit path (device)
996 /* These may be needed for future network-power-down code. */
999 * trans_start here is expensive for high speed devices on SMP,
1000 * please use netdev_queue->trans_start instead.
1002 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1004 int watchdog_timeo
; /* used by dev_watchdog() */
1005 struct timer_list watchdog_timer
;
1007 /* Number of references to this device */
1008 atomic_t refcnt ____cacheline_aligned_in_smp
;
1010 /* delayed register/unregister */
1011 struct list_head todo_list
;
1012 /* device index hash chain */
1013 struct hlist_node index_hlist
;
1015 struct list_head link_watch_list
;
1017 /* register/unregister state machine */
1018 enum { NETREG_UNINITIALIZED
=0,
1019 NETREG_REGISTERED
, /* completed register_netdevice */
1020 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1021 NETREG_UNREGISTERED
, /* completed unregister todo */
1022 NETREG_RELEASED
, /* called free_netdev */
1023 NETREG_DUMMY
, /* dummy device for NAPI poll */
1027 RTNL_LINK_INITIALIZED
,
1028 RTNL_LINK_INITIALIZING
,
1029 } rtnl_link_state
:16;
1031 /* Called from unregister, can be used to call free_netdev */
1032 void (*destructor
)(struct net_device
*dev
);
1034 #ifdef CONFIG_NETPOLL
1035 struct netpoll_info
*npinfo
;
1038 #ifdef CONFIG_NET_NS
1039 /* Network namespace this network device is inside */
1043 /* mid-layer private */
1047 struct garp_port
*garp_port
;
1049 /* class/net/name entry */
1051 /* space for optional device, statistics, and wireless sysfs groups */
1052 const struct attribute_group
*sysfs_groups
[4];
1054 /* rtnetlink link ops */
1055 const struct rtnl_link_ops
*rtnl_link_ops
;
1057 /* VLAN feature mask */
1058 unsigned long vlan_features
;
1060 /* for setting kernel sock attribute on TCP connection setup */
1061 #define GSO_MAX_SIZE 65536
1062 unsigned int gso_max_size
;
1065 /* Data Center Bridging netlink ops */
1066 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1069 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1070 /* max exchange id for FCoE LRO by ddp */
1071 unsigned int fcoe_ddp_xid
;
1073 /* n-tuple filter list attached to this device */
1074 struct ethtool_rx_ntuple_list ethtool_ntuple_list
;
1076 /* phy device may attach itself for hardware timestamping */
1077 struct phy_device
*phydev
;
1079 #define to_net_dev(d) container_of(d, struct net_device, dev)
1081 #define NETDEV_ALIGN 32
1084 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1087 return &dev
->_tx
[index
];
1090 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1091 void (*f
)(struct net_device
*,
1092 struct netdev_queue
*,
1098 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1099 f(dev
, &dev
->_tx
[i
], arg
);
1103 * Net namespace inlines
1106 struct net
*dev_net(const struct net_device
*dev
)
1108 return read_pnet(&dev
->nd_net
);
1112 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1114 #ifdef CONFIG_NET_NS
1115 release_net(dev
->nd_net
);
1116 dev
->nd_net
= hold_net(net
);
1120 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1122 #ifdef CONFIG_NET_DSA_TAG_DSA
1123 if (dev
->dsa_ptr
!= NULL
)
1124 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1130 #ifndef CONFIG_NET_NS
1131 static inline void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
)
1135 #else /* CONFIG_NET_NS */
1136 void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
);
1139 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1141 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1142 if (dev
->dsa_ptr
!= NULL
)
1143 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1150 * netdev_priv - access network device private data
1151 * @dev: network device
1153 * Get network device private data
1155 static inline void *netdev_priv(const struct net_device
*dev
)
1157 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1160 /* Set the sysfs physical device reference for the network logical device
1161 * if set prior to registration will cause a symlink during initialization.
1163 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1165 /* Set the sysfs device type for the network logical device to allow
1166 * fin grained indentification of different network device types. For
1167 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1169 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1172 * netif_napi_add - initialize a napi context
1173 * @dev: network device
1174 * @napi: napi context
1175 * @poll: polling function
1176 * @weight: default weight
1178 * netif_napi_add() must be used to initialize a napi context prior to calling
1179 * *any* of the other napi related functions.
1181 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1182 int (*poll
)(struct napi_struct
*, int), int weight
);
1185 * netif_napi_del - remove a napi context
1186 * @napi: napi context
1188 * netif_napi_del() removes a napi context from the network device napi list
1190 void netif_napi_del(struct napi_struct
*napi
);
1192 struct napi_gro_cb
{
1193 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1196 /* Length of frag0. */
1197 unsigned int frag0_len
;
1199 /* This indicates where we are processing relative to skb->data. */
1202 /* This is non-zero if the packet may be of the same flow. */
1205 /* This is non-zero if the packet cannot be merged with the new skb. */
1208 /* Number of segments aggregated. */
1215 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1217 struct packet_type
{
1218 __be16 type
; /* This is really htons(ether_type). */
1219 struct net_device
*dev
; /* NULL is wildcarded here */
1220 int (*func
) (struct sk_buff
*,
1221 struct net_device
*,
1222 struct packet_type
*,
1223 struct net_device
*);
1224 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1226 int (*gso_send_check
)(struct sk_buff
*skb
);
1227 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1228 struct sk_buff
*skb
);
1229 int (*gro_complete
)(struct sk_buff
*skb
);
1230 void *af_packet_priv
;
1231 struct list_head list
;
1234 #include <linux/interrupt.h>
1235 #include <linux/notifier.h>
1237 extern rwlock_t dev_base_lock
; /* Device list lock */
1240 #define for_each_netdev(net, d) \
1241 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1242 #define for_each_netdev_reverse(net, d) \
1243 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1244 #define for_each_netdev_rcu(net, d) \
1245 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1246 #define for_each_netdev_safe(net, d, n) \
1247 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1248 #define for_each_netdev_continue(net, d) \
1249 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1250 #define for_each_netdev_continue_rcu(net, d) \
1251 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1252 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1254 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1256 struct list_head
*lh
;
1260 lh
= dev
->dev_list
.next
;
1261 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1264 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1266 struct list_head
*lh
;
1270 lh
= rcu_dereference(dev
->dev_list
.next
);
1271 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1274 static inline struct net_device
*first_net_device(struct net
*net
)
1276 return list_empty(&net
->dev_base_head
) ? NULL
:
1277 net_device_entry(net
->dev_base_head
.next
);
1280 extern int netdev_boot_setup_check(struct net_device
*dev
);
1281 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1282 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1283 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1284 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1285 extern void dev_add_pack(struct packet_type
*pt
);
1286 extern void dev_remove_pack(struct packet_type
*pt
);
1287 extern void __dev_remove_pack(struct packet_type
*pt
);
1289 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1290 unsigned short mask
);
1291 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1292 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1293 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1294 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1295 extern int dev_open(struct net_device
*dev
);
1296 extern int dev_close(struct net_device
*dev
);
1297 extern void dev_disable_lro(struct net_device
*dev
);
1298 extern int dev_queue_xmit(struct sk_buff
*skb
);
1299 extern int register_netdevice(struct net_device
*dev
);
1300 extern void unregister_netdevice_queue(struct net_device
*dev
,
1301 struct list_head
*head
);
1302 extern void unregister_netdevice_many(struct list_head
*head
);
1303 static inline void unregister_netdevice(struct net_device
*dev
)
1305 unregister_netdevice_queue(dev
, NULL
);
1308 extern void free_netdev(struct net_device
*dev
);
1309 extern void synchronize_net(void);
1310 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1311 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1312 extern int init_dummy_netdev(struct net_device
*dev
);
1313 extern void netdev_resync_ops(struct net_device
*dev
);
1315 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1316 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1317 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1318 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1319 extern int dev_restart(struct net_device
*dev
);
1320 #ifdef CONFIG_NETPOLL_TRAP
1321 extern int netpoll_trap(void);
1323 extern int skb_gro_receive(struct sk_buff
**head
,
1324 struct sk_buff
*skb
);
1325 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1327 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1329 return NAPI_GRO_CB(skb
)->data_offset
;
1332 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1334 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1337 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1339 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1342 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1343 unsigned int offset
)
1345 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1348 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1350 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1353 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1354 unsigned int offset
)
1356 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1357 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1358 return pskb_may_pull(skb
, hlen
) ? skb
->data
+ offset
: NULL
;
1361 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1363 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1366 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1368 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1369 skb_network_offset(skb
);
1372 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1373 unsigned short type
,
1374 const void *daddr
, const void *saddr
,
1377 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1380 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1383 static inline int dev_parse_header(const struct sk_buff
*skb
,
1384 unsigned char *haddr
)
1386 const struct net_device
*dev
= skb
->dev
;
1388 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1390 return dev
->header_ops
->parse(skb
, haddr
);
1393 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1394 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1395 static inline int unregister_gifconf(unsigned int family
)
1397 return register_gifconf(family
, NULL
);
1401 * Incoming packets are placed on per-cpu queues
1403 struct softnet_data
{
1404 struct Qdisc
*output_queue
;
1405 struct Qdisc
**output_queue_tailp
;
1406 struct list_head poll_list
;
1407 struct sk_buff
*completion_queue
;
1408 struct sk_buff_head process_queue
;
1411 unsigned int processed
;
1412 unsigned int time_squeeze
;
1413 unsigned int cpu_collision
;
1414 unsigned int received_rps
;
1417 struct softnet_data
*rps_ipi_list
;
1419 /* Elements below can be accessed between CPUs for RPS */
1420 struct call_single_data csd ____cacheline_aligned_in_smp
;
1421 struct softnet_data
*rps_ipi_next
;
1423 unsigned int input_queue_head
;
1424 unsigned int input_queue_tail
;
1427 struct sk_buff_head input_pkt_queue
;
1428 struct napi_struct backlog
;
1431 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1434 sd
->input_queue_head
++;
1438 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1439 unsigned int *qtail
)
1442 *qtail
= ++sd
->input_queue_tail
;
1446 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1448 #define HAVE_NETIF_QUEUE
1450 extern void __netif_schedule(struct Qdisc
*q
);
1452 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1454 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1455 __netif_schedule(txq
->qdisc
);
1458 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1462 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1463 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1466 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1468 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1472 * netif_start_queue - allow transmit
1473 * @dev: network device
1475 * Allow upper layers to call the device hard_start_xmit routine.
1477 static inline void netif_start_queue(struct net_device
*dev
)
1479 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1482 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1486 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1487 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1488 netif_tx_start_queue(txq
);
1492 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1494 #ifdef CONFIG_NETPOLL_TRAP
1495 if (netpoll_trap()) {
1496 netif_tx_start_queue(dev_queue
);
1500 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1501 __netif_schedule(dev_queue
->qdisc
);
1505 * netif_wake_queue - restart transmit
1506 * @dev: network device
1508 * Allow upper layers to call the device hard_start_xmit routine.
1509 * Used for flow control when transmit resources are available.
1511 static inline void netif_wake_queue(struct net_device
*dev
)
1513 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1516 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1520 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1521 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1522 netif_tx_wake_queue(txq
);
1526 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1528 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1532 * netif_stop_queue - stop transmitted packets
1533 * @dev: network device
1535 * Stop upper layers calling the device hard_start_xmit routine.
1536 * Used for flow control when transmit resources are unavailable.
1538 static inline void netif_stop_queue(struct net_device
*dev
)
1540 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1543 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1547 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1548 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1549 netif_tx_stop_queue(txq
);
1553 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1555 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1559 * netif_queue_stopped - test if transmit queue is flowblocked
1560 * @dev: network device
1562 * Test if transmit queue on device is currently unable to send.
1564 static inline int netif_queue_stopped(const struct net_device
*dev
)
1566 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1569 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1571 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1575 * netif_running - test if up
1576 * @dev: network device
1578 * Test if the device has been brought up.
1580 static inline int netif_running(const struct net_device
*dev
)
1582 return test_bit(__LINK_STATE_START
, &dev
->state
);
1586 * Routines to manage the subqueues on a device. We only need start
1587 * stop, and a check if it's stopped. All other device management is
1588 * done at the overall netdevice level.
1589 * Also test the device if we're multiqueue.
1593 * netif_start_subqueue - allow sending packets on subqueue
1594 * @dev: network device
1595 * @queue_index: sub queue index
1597 * Start individual transmit queue of a device with multiple transmit queues.
1599 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1601 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1603 netif_tx_start_queue(txq
);
1607 * netif_stop_subqueue - stop sending packets on subqueue
1608 * @dev: network device
1609 * @queue_index: sub queue index
1611 * Stop individual transmit queue of a device with multiple transmit queues.
1613 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1615 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1616 #ifdef CONFIG_NETPOLL_TRAP
1620 netif_tx_stop_queue(txq
);
1624 * netif_subqueue_stopped - test status of subqueue
1625 * @dev: network device
1626 * @queue_index: sub queue index
1628 * Check individual transmit queue of a device with multiple transmit queues.
1630 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1633 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1635 return netif_tx_queue_stopped(txq
);
1638 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1639 struct sk_buff
*skb
)
1641 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1645 * netif_wake_subqueue - allow sending packets on subqueue
1646 * @dev: network device
1647 * @queue_index: sub queue index
1649 * Resume individual transmit queue of a device with multiple transmit queues.
1651 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1653 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1654 #ifdef CONFIG_NETPOLL_TRAP
1658 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1659 __netif_schedule(txq
->qdisc
);
1663 * netif_is_multiqueue - test if device has multiple transmit queues
1664 * @dev: network device
1666 * Check if device has multiple transmit queues
1668 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1670 return (dev
->num_tx_queues
> 1);
1673 extern void netif_set_real_num_tx_queues(struct net_device
*dev
,
1676 /* Use this variant when it is known for sure that it
1677 * is executing from hardware interrupt context or with hardware interrupts
1680 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1682 /* Use this variant in places where it could be invoked
1683 * from either hardware interrupt or other context, with hardware interrupts
1684 * either disabled or enabled.
1686 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1688 #define HAVE_NETIF_RX 1
1689 extern int netif_rx(struct sk_buff
*skb
);
1690 extern int netif_rx_ni(struct sk_buff
*skb
);
1691 #define HAVE_NETIF_RECEIVE_SKB 1
1692 extern int netif_receive_skb(struct sk_buff
*skb
);
1693 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
1694 struct sk_buff
*skb
);
1695 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
1696 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
1697 struct sk_buff
*skb
);
1698 extern void napi_reuse_skb(struct napi_struct
*napi
,
1699 struct sk_buff
*skb
);
1700 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1701 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
1702 struct sk_buff
*skb
,
1704 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1705 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
1707 static inline void napi_free_frags(struct napi_struct
*napi
)
1709 kfree_skb(napi
->skb
);
1713 extern int netdev_rx_handler_register(struct net_device
*dev
,
1714 rx_handler_func_t
*rx_handler
,
1715 void *rx_handler_data
);
1716 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
1718 extern void netif_nit_deliver(struct sk_buff
*skb
);
1719 extern int dev_valid_name(const char *name
);
1720 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1721 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1722 extern unsigned dev_get_flags(const struct net_device
*);
1723 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
1724 extern int dev_change_flags(struct net_device
*, unsigned);
1725 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
1726 extern int dev_change_name(struct net_device
*, const char *);
1727 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1728 extern int dev_change_net_namespace(struct net_device
*,
1729 struct net
*, const char *);
1730 extern int dev_set_mtu(struct net_device
*, int);
1731 extern int dev_set_mac_address(struct net_device
*,
1733 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1734 struct net_device
*dev
,
1735 struct netdev_queue
*txq
);
1736 extern int dev_forward_skb(struct net_device
*dev
,
1737 struct sk_buff
*skb
);
1739 extern int netdev_budget
;
1741 /* Called by rtnetlink.c:rtnl_unlock() */
1742 extern void netdev_run_todo(void);
1745 * dev_put - release reference to device
1746 * @dev: network device
1748 * Release reference to device to allow it to be freed.
1750 static inline void dev_put(struct net_device
*dev
)
1752 atomic_dec(&dev
->refcnt
);
1756 * dev_hold - get reference to device
1757 * @dev: network device
1759 * Hold reference to device to keep it from being freed.
1761 static inline void dev_hold(struct net_device
*dev
)
1763 atomic_inc(&dev
->refcnt
);
1766 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1767 * and _off may be called from IRQ context, but it is caller
1768 * who is responsible for serialization of these calls.
1770 * The name carrier is inappropriate, these functions should really be
1771 * called netif_lowerlayer_*() because they represent the state of any
1772 * kind of lower layer not just hardware media.
1775 extern void linkwatch_fire_event(struct net_device
*dev
);
1776 extern void linkwatch_forget_dev(struct net_device
*dev
);
1779 * netif_carrier_ok - test if carrier present
1780 * @dev: network device
1782 * Check if carrier is present on device
1784 static inline int netif_carrier_ok(const struct net_device
*dev
)
1786 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1789 extern unsigned long dev_trans_start(struct net_device
*dev
);
1791 extern void __netdev_watchdog_up(struct net_device
*dev
);
1793 extern void netif_carrier_on(struct net_device
*dev
);
1795 extern void netif_carrier_off(struct net_device
*dev
);
1797 extern void netif_notify_peers(struct net_device
*dev
);
1800 * netif_dormant_on - mark device as dormant.
1801 * @dev: network device
1803 * Mark device as dormant (as per RFC2863).
1805 * The dormant state indicates that the relevant interface is not
1806 * actually in a condition to pass packets (i.e., it is not 'up') but is
1807 * in a "pending" state, waiting for some external event. For "on-
1808 * demand" interfaces, this new state identifies the situation where the
1809 * interface is waiting for events to place it in the up state.
1812 static inline void netif_dormant_on(struct net_device
*dev
)
1814 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1815 linkwatch_fire_event(dev
);
1819 * netif_dormant_off - set device as not dormant.
1820 * @dev: network device
1822 * Device is not in dormant state.
1824 static inline void netif_dormant_off(struct net_device
*dev
)
1826 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1827 linkwatch_fire_event(dev
);
1831 * netif_dormant - test if carrier present
1832 * @dev: network device
1834 * Check if carrier is present on device
1836 static inline int netif_dormant(const struct net_device
*dev
)
1838 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1843 * netif_oper_up - test if device is operational
1844 * @dev: network device
1846 * Check if carrier is operational
1848 static inline int netif_oper_up(const struct net_device
*dev
)
1850 return (dev
->operstate
== IF_OPER_UP
||
1851 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1855 * netif_device_present - is device available or removed
1856 * @dev: network device
1858 * Check if device has not been removed from system.
1860 static inline int netif_device_present(struct net_device
*dev
)
1862 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1865 extern void netif_device_detach(struct net_device
*dev
);
1867 extern void netif_device_attach(struct net_device
*dev
);
1870 * Network interface message level settings
1872 #define HAVE_NETIF_MSG 1
1875 NETIF_MSG_DRV
= 0x0001,
1876 NETIF_MSG_PROBE
= 0x0002,
1877 NETIF_MSG_LINK
= 0x0004,
1878 NETIF_MSG_TIMER
= 0x0008,
1879 NETIF_MSG_IFDOWN
= 0x0010,
1880 NETIF_MSG_IFUP
= 0x0020,
1881 NETIF_MSG_RX_ERR
= 0x0040,
1882 NETIF_MSG_TX_ERR
= 0x0080,
1883 NETIF_MSG_TX_QUEUED
= 0x0100,
1884 NETIF_MSG_INTR
= 0x0200,
1885 NETIF_MSG_TX_DONE
= 0x0400,
1886 NETIF_MSG_RX_STATUS
= 0x0800,
1887 NETIF_MSG_PKTDATA
= 0x1000,
1888 NETIF_MSG_HW
= 0x2000,
1889 NETIF_MSG_WOL
= 0x4000,
1892 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1893 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1894 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1895 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1896 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1897 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1898 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1899 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1900 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1901 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1902 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1903 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1904 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1905 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1906 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1908 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1911 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1912 return default_msg_enable_bits
;
1913 if (debug_value
== 0) /* no output */
1915 /* set low N bits */
1916 return (1 << debug_value
) - 1;
1919 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1921 spin_lock(&txq
->_xmit_lock
);
1922 txq
->xmit_lock_owner
= cpu
;
1925 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1927 spin_lock_bh(&txq
->_xmit_lock
);
1928 txq
->xmit_lock_owner
= smp_processor_id();
1931 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1933 int ok
= spin_trylock(&txq
->_xmit_lock
);
1935 txq
->xmit_lock_owner
= smp_processor_id();
1939 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1941 txq
->xmit_lock_owner
= -1;
1942 spin_unlock(&txq
->_xmit_lock
);
1945 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
1947 txq
->xmit_lock_owner
= -1;
1948 spin_unlock_bh(&txq
->_xmit_lock
);
1951 static inline void txq_trans_update(struct netdev_queue
*txq
)
1953 if (txq
->xmit_lock_owner
!= -1)
1954 txq
->trans_start
= jiffies
;
1958 * netif_tx_lock - grab network device transmit lock
1959 * @dev: network device
1961 * Get network device transmit lock
1963 static inline void netif_tx_lock(struct net_device
*dev
)
1968 spin_lock(&dev
->tx_global_lock
);
1969 cpu
= smp_processor_id();
1970 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1971 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1973 /* We are the only thread of execution doing a
1974 * freeze, but we have to grab the _xmit_lock in
1975 * order to synchronize with threads which are in
1976 * the ->hard_start_xmit() handler and already
1977 * checked the frozen bit.
1979 __netif_tx_lock(txq
, cpu
);
1980 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1981 __netif_tx_unlock(txq
);
1985 static inline void netif_tx_lock_bh(struct net_device
*dev
)
1991 static inline void netif_tx_unlock(struct net_device
*dev
)
1995 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1996 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1998 /* No need to grab the _xmit_lock here. If the
1999 * queue is not stopped for another reason, we
2002 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2003 netif_schedule_queue(txq
);
2005 spin_unlock(&dev
->tx_global_lock
);
2008 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2010 netif_tx_unlock(dev
);
2014 #define HARD_TX_LOCK(dev, txq, cpu) { \
2015 if ((dev->features & NETIF_F_LLTX) == 0) { \
2016 __netif_tx_lock(txq, cpu); \
2020 #define HARD_TX_UNLOCK(dev, txq) { \
2021 if ((dev->features & NETIF_F_LLTX) == 0) { \
2022 __netif_tx_unlock(txq); \
2026 static inline void netif_tx_disable(struct net_device
*dev
)
2032 cpu
= smp_processor_id();
2033 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2034 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2036 __netif_tx_lock(txq
, cpu
);
2037 netif_tx_stop_queue(txq
);
2038 __netif_tx_unlock(txq
);
2043 static inline void netif_addr_lock(struct net_device
*dev
)
2045 spin_lock(&dev
->addr_list_lock
);
2048 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2050 spin_lock_bh(&dev
->addr_list_lock
);
2053 static inline void netif_addr_unlock(struct net_device
*dev
)
2055 spin_unlock(&dev
->addr_list_lock
);
2058 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2060 spin_unlock_bh(&dev
->addr_list_lock
);
2064 * dev_addrs walker. Should be used only for read access. Call with
2065 * rcu_read_lock held.
2067 #define for_each_dev_addr(dev, ha) \
2068 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2070 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2072 extern void ether_setup(struct net_device
*dev
);
2074 /* Support for loadable net-drivers */
2075 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
2076 void (*setup
)(struct net_device
*),
2077 unsigned int queue_count
);
2078 #define alloc_netdev(sizeof_priv, name, setup) \
2079 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2080 extern int register_netdev(struct net_device
*dev
);
2081 extern void unregister_netdev(struct net_device
*dev
);
2083 /* General hardware address lists handling functions */
2084 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2085 struct netdev_hw_addr_list
*from_list
,
2086 int addr_len
, unsigned char addr_type
);
2087 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2088 struct netdev_hw_addr_list
*from_list
,
2089 int addr_len
, unsigned char addr_type
);
2090 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2091 struct netdev_hw_addr_list
*from_list
,
2093 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2094 struct netdev_hw_addr_list
*from_list
,
2096 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2097 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2099 /* Functions used for device addresses handling */
2100 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2101 unsigned char addr_type
);
2102 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2103 unsigned char addr_type
);
2104 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2105 struct net_device
*from_dev
,
2106 unsigned char addr_type
);
2107 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2108 struct net_device
*from_dev
,
2109 unsigned char addr_type
);
2110 extern void dev_addr_flush(struct net_device
*dev
);
2111 extern int dev_addr_init(struct net_device
*dev
);
2113 /* Functions used for unicast addresses handling */
2114 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2115 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2116 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2117 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2118 extern void dev_uc_flush(struct net_device
*dev
);
2119 extern void dev_uc_init(struct net_device
*dev
);
2121 /* Functions used for multicast addresses handling */
2122 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2123 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2124 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2125 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2126 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2127 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2128 extern void dev_mc_flush(struct net_device
*dev
);
2129 extern void dev_mc_init(struct net_device
*dev
);
2131 /* Functions used for secondary unicast and multicast support */
2132 extern void dev_set_rx_mode(struct net_device
*dev
);
2133 extern void __dev_set_rx_mode(struct net_device
*dev
);
2134 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2135 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2136 extern void netdev_state_change(struct net_device
*dev
);
2137 extern int netdev_bonding_change(struct net_device
*dev
,
2138 unsigned long event
);
2139 extern void netdev_features_change(struct net_device
*dev
);
2140 /* Load a device via the kmod */
2141 extern void dev_load(struct net
*net
, const char *name
);
2142 extern void dev_mcast_init(void);
2143 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2144 struct rtnl_link_stats64
*storage
);
2145 extern void dev_txq_stats_fold(const struct net_device
*dev
,
2146 struct rtnl_link_stats64
*stats
);
2148 extern int netdev_max_backlog
;
2149 extern int netdev_tstamp_prequeue
;
2150 extern int weight_p
;
2151 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2152 extern int skb_checksum_help(struct sk_buff
*skb
);
2153 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
2155 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2157 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2161 /* rx skb timestamps */
2162 extern void net_enable_timestamp(void);
2163 extern void net_disable_timestamp(void);
2165 #ifdef CONFIG_PROC_FS
2166 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2167 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2168 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2171 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2172 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2174 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
2176 extern void linkwatch_run_queue(void);
2178 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
2179 unsigned long mask
);
2180 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
2182 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2183 struct net_device
*dev
);
2185 static inline int net_gso_ok(int features
, int gso_type
)
2187 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2188 return (features
& feature
) == feature
;
2191 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
2193 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2194 (!skb_has_frags(skb
) || (features
& NETIF_F_FRAGLIST
));
2197 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
2199 return skb_is_gso(skb
) &&
2200 (!skb_gso_ok(skb
, dev
->features
) ||
2201 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
2204 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2207 dev
->gso_max_size
= size
;
2210 extern int __skb_bond_should_drop(struct sk_buff
*skb
,
2211 struct net_device
*master
);
2213 static inline int skb_bond_should_drop(struct sk_buff
*skb
,
2214 struct net_device
*master
)
2217 return __skb_bond_should_drop(skb
, master
);
2221 extern struct pernet_operations __net_initdata loopback_net_ops
;
2223 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
2224 struct ethtool_cmd
*cmd
)
2226 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
2228 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
2231 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
2233 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
2235 return dev
->ethtool_ops
->get_rx_csum(dev
);
2238 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
2240 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
2242 return dev
->ethtool_ops
->get_flags(dev
);
2245 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2247 /* netdev_printk helpers, similar to dev_printk */
2249 static inline const char *netdev_name(const struct net_device
*dev
)
2251 if (dev
->reg_state
!= NETREG_REGISTERED
)
2252 return "(unregistered net_device)";
2256 extern int netdev_printk(const char *level
, const struct net_device
*dev
,
2257 const char *format
, ...)
2258 __attribute__ ((format (printf
, 3, 4)));
2259 extern int netdev_emerg(const struct net_device
*dev
, const char *format
, ...)
2260 __attribute__ ((format (printf
, 2, 3)));
2261 extern int netdev_alert(const struct net_device
*dev
, const char *format
, ...)
2262 __attribute__ ((format (printf
, 2, 3)));
2263 extern int netdev_crit(const struct net_device
*dev
, const char *format
, ...)
2264 __attribute__ ((format (printf
, 2, 3)));
2265 extern int netdev_err(const struct net_device
*dev
, const char *format
, ...)
2266 __attribute__ ((format (printf
, 2, 3)));
2267 extern int netdev_warn(const struct net_device
*dev
, const char *format
, ...)
2268 __attribute__ ((format (printf
, 2, 3)));
2269 extern int netdev_notice(const struct net_device
*dev
, const char *format
, ...)
2270 __attribute__ ((format (printf
, 2, 3)));
2271 extern int netdev_info(const struct net_device
*dev
, const char *format
, ...)
2272 __attribute__ ((format (printf
, 2, 3)));
2275 #define netdev_dbg(__dev, format, args...) \
2276 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2277 #elif defined(CONFIG_DYNAMIC_DEBUG)
2278 #define netdev_dbg(__dev, format, args...) \
2280 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2281 netdev_name(__dev), ##args); \
2284 #define netdev_dbg(__dev, format, args...) \
2287 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2292 #if defined(VERBOSE_DEBUG)
2293 #define netdev_vdbg netdev_dbg
2296 #define netdev_vdbg(dev, format, args...) \
2299 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2305 * netdev_WARN() acts like dev_printk(), but with the key difference
2306 * of using a WARN/WARN_ON to get the message out, including the
2307 * file/line information and a backtrace.
2309 #define netdev_WARN(dev, format, args...) \
2310 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2312 /* netif printk helpers, similar to netdev_printk */
2314 #define netif_printk(priv, type, level, dev, fmt, args...) \
2316 if (netif_msg_##type(priv)) \
2317 netdev_printk(level, (dev), fmt, ##args); \
2320 #define netif_level(level, priv, type, dev, fmt, args...) \
2322 if (netif_msg_##type(priv)) \
2323 netdev_##level(dev, fmt, ##args); \
2326 #define netif_emerg(priv, type, dev, fmt, args...) \
2327 netif_level(emerg, priv, type, dev, fmt, ##args)
2328 #define netif_alert(priv, type, dev, fmt, args...) \
2329 netif_level(alert, priv, type, dev, fmt, ##args)
2330 #define netif_crit(priv, type, dev, fmt, args...) \
2331 netif_level(crit, priv, type, dev, fmt, ##args)
2332 #define netif_err(priv, type, dev, fmt, args...) \
2333 netif_level(err, priv, type, dev, fmt, ##args)
2334 #define netif_warn(priv, type, dev, fmt, args...) \
2335 netif_level(warn, priv, type, dev, fmt, ##args)
2336 #define netif_notice(priv, type, dev, fmt, args...) \
2337 netif_level(notice, priv, type, dev, fmt, ##args)
2338 #define netif_info(priv, type, dev, fmt, args...) \
2339 netif_level(info, priv, type, dev, fmt, ##args)
2342 #define netif_dbg(priv, type, dev, format, args...) \
2343 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2344 #elif defined(CONFIG_DYNAMIC_DEBUG)
2345 #define netif_dbg(priv, type, netdev, format, args...) \
2347 if (netif_msg_##type(priv)) \
2348 dynamic_dev_dbg((netdev)->dev.parent, \
2350 netdev_name(netdev), ##args); \
2353 #define netif_dbg(priv, type, dev, format, args...) \
2356 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2361 #if defined(VERBOSE_DEBUG)
2362 #define netif_vdbg netif_dbg
2364 #define netif_vdbg(priv, type, dev, format, args...) \
2367 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2372 #endif /* __KERNEL__ */
2374 #endif /* _LINUX_NETDEVICE_H */