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 static inline void hh_cache_put(struct hh_cache
*hh
)
286 if (atomic_dec_and_test(&hh
->hh_refcnt
))
290 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
292 * dev->hard_header_len ? (dev->hard_header_len +
293 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
295 * We could use other alignment values, but we must maintain the
296 * relationship HH alignment <= LL alignment.
298 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
301 #define LL_RESERVED_SPACE(dev) \
302 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
303 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
304 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
305 #define LL_ALLOCATED_SPACE(dev) \
306 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
309 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
310 unsigned short type
, const void *daddr
,
311 const void *saddr
, unsigned len
);
312 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
313 int (*rebuild
)(struct sk_buff
*skb
);
314 #define HAVE_HEADER_CACHE
315 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
316 void (*cache_update
)(struct hh_cache
*hh
,
317 const struct net_device
*dev
,
318 const unsigned char *haddr
);
321 /* These flag bits are private to the generic network queueing
322 * layer, they may not be explicitly referenced by any other
326 enum netdev_state_t
{
328 __LINK_STATE_PRESENT
,
329 __LINK_STATE_NOCARRIER
,
330 __LINK_STATE_LINKWATCH_PENDING
,
331 __LINK_STATE_DORMANT
,
336 * This structure holds at boot time configured netdevice settings. They
337 * are then used in the device probing.
339 struct netdev_boot_setup
{
343 #define NETDEV_BOOT_SETUP_MAX 8
345 extern int __init
netdev_boot_setup(char *str
);
348 * Structure for NAPI scheduling similar to tasklet but with weighting
351 /* The poll_list must only be managed by the entity which
352 * changes the state of the NAPI_STATE_SCHED bit. This means
353 * whoever atomically sets that bit can add this napi_struct
354 * to the per-cpu poll_list, and whoever clears that bit
355 * can remove from the list right before clearing the bit.
357 struct list_head poll_list
;
361 int (*poll
)(struct napi_struct
*, int);
362 #ifdef CONFIG_NETPOLL
363 spinlock_t poll_lock
;
367 unsigned int gro_count
;
369 struct net_device
*dev
;
370 struct list_head dev_list
;
371 struct sk_buff
*gro_list
;
376 NAPI_STATE_SCHED
, /* Poll is scheduled */
377 NAPI_STATE_DISABLE
, /* Disable pending */
378 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
388 typedef enum gro_result gro_result_t
;
390 typedef struct sk_buff
*rx_handler_func_t(struct sk_buff
*skb
);
392 extern void __napi_schedule(struct napi_struct
*n
);
394 static inline int napi_disable_pending(struct napi_struct
*n
)
396 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
400 * napi_schedule_prep - check if napi can be scheduled
403 * Test if NAPI routine is already running, and if not mark
404 * it as running. This is used as a condition variable
405 * insure only one NAPI poll instance runs. We also make
406 * sure there is no pending NAPI disable.
408 static inline int napi_schedule_prep(struct napi_struct
*n
)
410 return !napi_disable_pending(n
) &&
411 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
415 * napi_schedule - schedule NAPI poll
418 * Schedule NAPI poll routine to be called if it is not already
421 static inline void napi_schedule(struct napi_struct
*n
)
423 if (napi_schedule_prep(n
))
427 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
428 static inline int napi_reschedule(struct napi_struct
*napi
)
430 if (napi_schedule_prep(napi
)) {
431 __napi_schedule(napi
);
438 * napi_complete - NAPI processing complete
441 * Mark NAPI processing as complete.
443 extern void __napi_complete(struct napi_struct
*n
);
444 extern void napi_complete(struct napi_struct
*n
);
447 * napi_disable - prevent NAPI from scheduling
450 * Stop NAPI from being scheduled on this context.
451 * Waits till any outstanding processing completes.
453 static inline void napi_disable(struct napi_struct
*n
)
455 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
456 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
458 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
462 * napi_enable - enable NAPI scheduling
465 * Resume NAPI from being scheduled on this context.
466 * Must be paired with napi_disable.
468 static inline void napi_enable(struct napi_struct
*n
)
470 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
471 smp_mb__before_clear_bit();
472 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
477 * napi_synchronize - wait until NAPI is not running
480 * Wait until NAPI is done being scheduled on this context.
481 * Waits till any outstanding processing completes but
482 * does not disable future activations.
484 static inline void napi_synchronize(const struct napi_struct
*n
)
486 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
490 # define napi_synchronize(n) barrier()
493 enum netdev_queue_state_t
{
495 __QUEUE_STATE_FROZEN
,
498 struct netdev_queue
{
502 struct net_device
*dev
;
505 struct Qdisc
*qdisc_sleeping
;
509 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
512 * please use this field instead of dev->trans_start
514 unsigned long trans_start
;
518 } ____cacheline_aligned_in_smp
;
522 * This structure holds an RPS map which can be of variable length. The
523 * map is an array of CPUs.
530 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
533 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
534 * tail pointer for that CPU's input queue at the time of last enqueue.
536 struct rps_dev_flow
{
539 unsigned int last_qtail
;
543 * The rps_dev_flow_table structure contains a table of flow mappings.
545 struct rps_dev_flow_table
{
548 struct work_struct free_work
;
549 struct rps_dev_flow flows
[0];
551 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
552 (_num * sizeof(struct rps_dev_flow)))
555 * The rps_sock_flow_table contains mappings of flows to the last CPU
556 * on which they were processed by the application (set in recvmsg).
558 struct rps_sock_flow_table
{
562 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
563 (_num * sizeof(u16)))
565 #define RPS_NO_CPU 0xffff
567 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
571 unsigned int cpu
, index
= hash
& table
->mask
;
573 /* We only give a hint, preemption can change cpu under us */
574 cpu
= raw_smp_processor_id();
576 if (table
->ents
[index
] != cpu
)
577 table
->ents
[index
] = cpu
;
581 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
585 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
588 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
590 /* This structure contains an instance of an RX queue. */
591 struct netdev_rx_queue
{
592 struct rps_map __rcu
*rps_map
;
593 struct rps_dev_flow_table __rcu
*rps_flow_table
;
595 struct netdev_rx_queue
*first
;
597 } ____cacheline_aligned_in_smp
;
598 #endif /* CONFIG_RPS */
601 * This structure defines the management hooks for network devices.
602 * The following hooks can be defined; unless noted otherwise, they are
603 * optional and can be filled with a null pointer.
605 * int (*ndo_init)(struct net_device *dev);
606 * This function is called once when network device is registered.
607 * The network device can use this to any late stage initializaton
608 * or semantic validattion. It can fail with an error code which will
609 * be propogated back to register_netdev
611 * void (*ndo_uninit)(struct net_device *dev);
612 * This function is called when device is unregistered or when registration
613 * fails. It is not called if init fails.
615 * int (*ndo_open)(struct net_device *dev);
616 * This function is called when network device transistions to the up
619 * int (*ndo_stop)(struct net_device *dev);
620 * This function is called when network device transistions to the down
623 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
624 * struct net_device *dev);
625 * Called when a packet needs to be transmitted.
626 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
627 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
628 * Required can not be NULL.
630 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
631 * Called to decide which queue to when device supports multiple
634 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
635 * This function is called to allow device receiver to make
636 * changes to configuration when multicast or promiscious is enabled.
638 * void (*ndo_set_rx_mode)(struct net_device *dev);
639 * This function is called device changes address list filtering.
641 * void (*ndo_set_multicast_list)(struct net_device *dev);
642 * This function is called when the multicast address list changes.
644 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
645 * This function is called when the Media Access Control address
646 * needs to be changed. If this interface is not defined, the
647 * mac address can not be changed.
649 * int (*ndo_validate_addr)(struct net_device *dev);
650 * Test if Media Access Control address is valid for the device.
652 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
653 * Called when a user request an ioctl which can't be handled by
654 * the generic interface code. If not defined ioctl's return
655 * not supported error code.
657 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
658 * Used to set network devices bus interface parameters. This interface
659 * is retained for legacy reason, new devices should use the bus
660 * interface (PCI) for low level management.
662 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
663 * Called when a user wants to change the Maximum Transfer Unit
664 * of a device. If not defined, any request to change MTU will
665 * will return an error.
667 * void (*ndo_tx_timeout)(struct net_device *dev);
668 * Callback uses when the transmitter has not made any progress
669 * for dev->watchdog ticks.
671 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
672 * struct rtnl_link_stats64 *storage);
673 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
674 * Called when a user wants to get the network device usage
675 * statistics. Drivers must do one of the following:
676 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
677 * rtnl_link_stats64 structure passed by the caller.
678 * 2. Define @ndo_get_stats to update a net_device_stats structure
679 * (which should normally be dev->stats) and return a pointer to
680 * it. The structure may be changed asynchronously only if each
681 * field is written atomically.
682 * 3. Update dev->stats asynchronously and atomically, and define
685 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
686 * If device support VLAN receive accleration
687 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
688 * when vlan groups for the device changes. Note: grp is NULL
689 * if no vlan's groups are being used.
691 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
692 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
693 * this function is called when a VLAN id is registered.
695 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
696 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
697 * this function is called when a VLAN id is unregistered.
699 * void (*ndo_poll_controller)(struct net_device *dev);
701 * SR-IOV management functions.
702 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
703 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
704 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
705 * int (*ndo_get_vf_config)(struct net_device *dev,
706 * int vf, struct ifla_vf_info *ivf);
707 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
708 * struct nlattr *port[]);
709 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
711 #define HAVE_NET_DEVICE_OPS
712 struct net_device_ops
{
713 int (*ndo_init
)(struct net_device
*dev
);
714 void (*ndo_uninit
)(struct net_device
*dev
);
715 int (*ndo_open
)(struct net_device
*dev
);
716 int (*ndo_stop
)(struct net_device
*dev
);
717 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
718 struct net_device
*dev
);
719 u16 (*ndo_select_queue
)(struct net_device
*dev
,
720 struct sk_buff
*skb
);
721 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
723 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
724 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
725 int (*ndo_set_mac_address
)(struct net_device
*dev
,
727 int (*ndo_validate_addr
)(struct net_device
*dev
);
728 int (*ndo_do_ioctl
)(struct net_device
*dev
,
729 struct ifreq
*ifr
, int cmd
);
730 int (*ndo_set_config
)(struct net_device
*dev
,
732 int (*ndo_change_mtu
)(struct net_device
*dev
,
734 int (*ndo_neigh_setup
)(struct net_device
*dev
,
735 struct neigh_parms
*);
736 void (*ndo_tx_timeout
) (struct net_device
*dev
);
738 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
739 struct rtnl_link_stats64
*storage
);
740 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
742 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
743 struct vlan_group
*grp
);
744 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
746 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
748 #ifdef CONFIG_NET_POLL_CONTROLLER
749 void (*ndo_poll_controller
)(struct net_device
*dev
);
750 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
751 struct netpoll_info
*info
);
752 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
754 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
756 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
757 int queue
, u16 vlan
, u8 qos
);
758 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
760 int (*ndo_get_vf_config
)(struct net_device
*dev
,
762 struct ifla_vf_info
*ivf
);
763 int (*ndo_set_vf_port
)(struct net_device
*dev
,
765 struct nlattr
*port
[]);
766 int (*ndo_get_vf_port
)(struct net_device
*dev
,
767 int vf
, struct sk_buff
*skb
);
768 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
769 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
770 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
771 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
773 struct scatterlist
*sgl
,
775 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
777 #define NETDEV_FCOE_WWNN 0
778 #define NETDEV_FCOE_WWPN 1
779 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
785 * The DEVICE structure.
786 * Actually, this whole structure is a big mistake. It mixes I/O
787 * data with strictly "high-level" data, and it has to know about
788 * almost every data structure used in the INET module.
790 * FIXME: cleanup struct net_device such that network protocol info
797 * This is the first field of the "visible" part of this structure
798 * (i.e. as seen by users in the "Space.c" file). It is the name
803 struct pm_qos_request_list pm_qos_req
;
805 /* device name hash chain */
806 struct hlist_node name_hlist
;
811 * I/O specific fields
812 * FIXME: Merge these and struct ifmap into one
814 unsigned long mem_end
; /* shared mem end */
815 unsigned long mem_start
; /* shared mem start */
816 unsigned long base_addr
; /* device I/O address */
817 unsigned int irq
; /* device IRQ number */
820 * Some hardware also needs these fields, but they are not
821 * part of the usual set specified in Space.c.
824 unsigned char if_port
; /* Selectable AUI, TP,..*/
825 unsigned char dma
; /* DMA channel */
829 struct list_head dev_list
;
830 struct list_head napi_list
;
831 struct list_head unreg_list
;
833 /* Net device features */
834 unsigned long features
;
835 #define NETIF_F_SG 1 /* Scatter/gather IO. */
836 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
837 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
838 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
839 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
840 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
841 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
842 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
843 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
844 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
845 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
846 #define NETIF_F_GSO 2048 /* Enable software GSO. */
847 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
848 /* do not use LLTX in new drivers */
849 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
850 #define NETIF_F_GRO 16384 /* Generic receive offload */
851 #define NETIF_F_LRO 32768 /* large receive offload */
853 /* the GSO_MASK reserves bits 16 through 23 */
854 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
855 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
856 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
857 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
858 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
860 /* Segmentation offload features */
861 #define NETIF_F_GSO_SHIFT 16
862 #define NETIF_F_GSO_MASK 0x00ff0000
863 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
864 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
865 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
866 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
867 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
868 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
870 /* List of features with software fallbacks. */
871 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
872 NETIF_F_TSO6 | NETIF_F_UFO)
875 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
876 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
877 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
878 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
881 * If one device supports one of these features, then enable them
882 * for all in netdev_increment_features.
884 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
885 NETIF_F_SG | NETIF_F_HIGHDMA | \
888 /* Interface index. Unique device identifier */
892 struct net_device_stats stats
;
893 atomic_long_t rx_dropped
; /* dropped packets by core network
894 * Do not use this in drivers.
897 #ifdef CONFIG_WIRELESS_EXT
898 /* List of functions to handle Wireless Extensions (instead of ioctl).
899 * See <net/iw_handler.h> for details. Jean II */
900 const struct iw_handler_def
* wireless_handlers
;
901 /* Instance data managed by the core of Wireless Extensions. */
902 struct iw_public_data
* wireless_data
;
904 /* Management operations */
905 const struct net_device_ops
*netdev_ops
;
906 const struct ethtool_ops
*ethtool_ops
;
908 /* Hardware header description */
909 const struct header_ops
*header_ops
;
911 unsigned int flags
; /* interface flags (a la BSD) */
912 unsigned short gflags
;
913 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace. */
914 unsigned short padded
; /* How much padding added by alloc_netdev() */
916 unsigned char operstate
; /* RFC2863 operstate */
917 unsigned char link_mode
; /* mapping policy to operstate */
919 unsigned int mtu
; /* interface MTU value */
920 unsigned short type
; /* interface hardware type */
921 unsigned short hard_header_len
; /* hardware hdr length */
923 /* extra head- and tailroom the hardware may need, but not in all cases
924 * can this be guaranteed, especially tailroom. Some cases also use
925 * LL_MAX_HEADER instead to allocate the skb.
927 unsigned short needed_headroom
;
928 unsigned short needed_tailroom
;
930 /* Interface address info. */
931 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
932 unsigned char addr_assign_type
; /* hw address assignment type */
933 unsigned char addr_len
; /* hardware address length */
934 unsigned short dev_id
; /* for shared network cards */
936 spinlock_t addr_list_lock
;
937 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
938 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
940 unsigned int promiscuity
;
941 unsigned int allmulti
;
944 /* Protocol specific pointers */
946 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
947 struct vlan_group __rcu
*vlgrp
; /* VLAN group */
949 #ifdef CONFIG_NET_DSA
950 void *dsa_ptr
; /* dsa specific data */
952 void *atalk_ptr
; /* AppleTalk link */
953 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
954 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
955 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
956 void *ec_ptr
; /* Econet specific data */
957 void *ax25_ptr
; /* AX.25 specific data */
958 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
959 assign before registering */
962 * Cache lines mostly used on receive path (including eth_type_trans())
964 unsigned long last_rx
; /* Time of last Rx
965 * This should not be set in
966 * drivers, unless really needed,
967 * because network stack (bonding)
968 * use it if/when necessary, to
969 * avoid dirtying this cache line.
972 struct net_device
*master
; /* Pointer to master device of a group,
973 * which this device is member of.
976 /* Interface address info used in eth_type_trans() */
977 unsigned char *dev_addr
; /* hw address, (before bcast
978 because most packets are
981 struct netdev_hw_addr_list dev_addrs
; /* list of device
984 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
987 struct kset
*queues_kset
;
989 struct netdev_rx_queue
*_rx
;
991 /* Number of RX queues allocated at register_netdev() time */
992 unsigned int num_rx_queues
;
994 /* Number of RX queues currently active in device */
995 unsigned int real_num_rx_queues
;
998 rx_handler_func_t
*rx_handler
;
999 void *rx_handler_data
;
1001 struct netdev_queue __rcu
*ingress_queue
;
1004 * Cache lines mostly used on transmit path
1006 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1008 /* Number of TX queues allocated at alloc_netdev_mq() time */
1009 unsigned int num_tx_queues
;
1011 /* Number of TX queues currently active in device */
1012 unsigned int real_num_tx_queues
;
1014 /* root qdisc from userspace point of view */
1015 struct Qdisc
*qdisc
;
1017 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1018 spinlock_t tx_global_lock
;
1020 /* These may be needed for future network-power-down code. */
1023 * trans_start here is expensive for high speed devices on SMP,
1024 * please use netdev_queue->trans_start instead.
1026 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1028 int watchdog_timeo
; /* used by dev_watchdog() */
1029 struct timer_list watchdog_timer
;
1031 /* Number of references to this device */
1032 int __percpu
*pcpu_refcnt
;
1034 /* delayed register/unregister */
1035 struct list_head todo_list
;
1036 /* device index hash chain */
1037 struct hlist_node index_hlist
;
1039 struct list_head link_watch_list
;
1041 /* register/unregister state machine */
1042 enum { NETREG_UNINITIALIZED
=0,
1043 NETREG_REGISTERED
, /* completed register_netdevice */
1044 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1045 NETREG_UNREGISTERED
, /* completed unregister todo */
1046 NETREG_RELEASED
, /* called free_netdev */
1047 NETREG_DUMMY
, /* dummy device for NAPI poll */
1051 RTNL_LINK_INITIALIZED
,
1052 RTNL_LINK_INITIALIZING
,
1053 } rtnl_link_state
:16;
1055 /* Called from unregister, can be used to call free_netdev */
1056 void (*destructor
)(struct net_device
*dev
);
1058 #ifdef CONFIG_NETPOLL
1059 struct netpoll_info
*npinfo
;
1062 #ifdef CONFIG_NET_NS
1063 /* Network namespace this network device is inside */
1067 /* mid-layer private */
1070 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1071 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1072 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1075 struct garp_port __rcu
*garp_port
;
1077 /* class/net/name entry */
1079 /* space for optional device, statistics, and wireless sysfs groups */
1080 const struct attribute_group
*sysfs_groups
[4];
1082 /* rtnetlink link ops */
1083 const struct rtnl_link_ops
*rtnl_link_ops
;
1085 /* VLAN feature mask */
1086 unsigned long vlan_features
;
1088 /* for setting kernel sock attribute on TCP connection setup */
1089 #define GSO_MAX_SIZE 65536
1090 unsigned int gso_max_size
;
1093 /* Data Center Bridging netlink ops */
1094 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1097 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1098 /* max exchange id for FCoE LRO by ddp */
1099 unsigned int fcoe_ddp_xid
;
1101 /* n-tuple filter list attached to this device */
1102 struct ethtool_rx_ntuple_list ethtool_ntuple_list
;
1104 /* phy device may attach itself for hardware timestamping */
1105 struct phy_device
*phydev
;
1107 #define to_net_dev(d) container_of(d, struct net_device, dev)
1109 #define NETDEV_ALIGN 32
1112 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1115 return &dev
->_tx
[index
];
1118 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1119 void (*f
)(struct net_device
*,
1120 struct netdev_queue
*,
1126 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1127 f(dev
, &dev
->_tx
[i
], arg
);
1131 * Net namespace inlines
1134 struct net
*dev_net(const struct net_device
*dev
)
1136 return read_pnet(&dev
->nd_net
);
1140 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1142 #ifdef CONFIG_NET_NS
1143 release_net(dev
->nd_net
);
1144 dev
->nd_net
= hold_net(net
);
1148 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1150 #ifdef CONFIG_NET_DSA_TAG_DSA
1151 if (dev
->dsa_ptr
!= NULL
)
1152 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1158 #ifndef CONFIG_NET_NS
1159 static inline void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
)
1163 #else /* CONFIG_NET_NS */
1164 void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
);
1167 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1169 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1170 if (dev
->dsa_ptr
!= NULL
)
1171 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1178 * netdev_priv - access network device private data
1179 * @dev: network device
1181 * Get network device private data
1183 static inline void *netdev_priv(const struct net_device
*dev
)
1185 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1188 /* Set the sysfs physical device reference for the network logical device
1189 * if set prior to registration will cause a symlink during initialization.
1191 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1193 /* Set the sysfs device type for the network logical device to allow
1194 * fin grained indentification of different network device types. For
1195 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1197 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1200 * netif_napi_add - initialize a napi context
1201 * @dev: network device
1202 * @napi: napi context
1203 * @poll: polling function
1204 * @weight: default weight
1206 * netif_napi_add() must be used to initialize a napi context prior to calling
1207 * *any* of the other napi related functions.
1209 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1210 int (*poll
)(struct napi_struct
*, int), int weight
);
1213 * netif_napi_del - remove a napi context
1214 * @napi: napi context
1216 * netif_napi_del() removes a napi context from the network device napi list
1218 void netif_napi_del(struct napi_struct
*napi
);
1220 struct napi_gro_cb
{
1221 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1224 /* Length of frag0. */
1225 unsigned int frag0_len
;
1227 /* This indicates where we are processing relative to skb->data. */
1230 /* This is non-zero if the packet may be of the same flow. */
1233 /* This is non-zero if the packet cannot be merged with the new skb. */
1236 /* Number of segments aggregated. */
1243 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1245 struct packet_type
{
1246 __be16 type
; /* This is really htons(ether_type). */
1247 struct net_device
*dev
; /* NULL is wildcarded here */
1248 int (*func
) (struct sk_buff
*,
1249 struct net_device
*,
1250 struct packet_type
*,
1251 struct net_device
*);
1252 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1254 int (*gso_send_check
)(struct sk_buff
*skb
);
1255 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1256 struct sk_buff
*skb
);
1257 int (*gro_complete
)(struct sk_buff
*skb
);
1258 void *af_packet_priv
;
1259 struct list_head list
;
1262 #include <linux/interrupt.h>
1263 #include <linux/notifier.h>
1265 extern rwlock_t dev_base_lock
; /* Device list lock */
1268 #define for_each_netdev(net, d) \
1269 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1270 #define for_each_netdev_reverse(net, d) \
1271 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1272 #define for_each_netdev_rcu(net, d) \
1273 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1274 #define for_each_netdev_safe(net, d, n) \
1275 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1276 #define for_each_netdev_continue(net, d) \
1277 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1278 #define for_each_netdev_continue_rcu(net, d) \
1279 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1280 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1282 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1284 struct list_head
*lh
;
1288 lh
= dev
->dev_list
.next
;
1289 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1292 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1294 struct list_head
*lh
;
1298 lh
= rcu_dereference(dev
->dev_list
.next
);
1299 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1302 static inline struct net_device
*first_net_device(struct net
*net
)
1304 return list_empty(&net
->dev_base_head
) ? NULL
:
1305 net_device_entry(net
->dev_base_head
.next
);
1308 extern int netdev_boot_setup_check(struct net_device
*dev
);
1309 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1310 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1311 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1312 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1313 extern void dev_add_pack(struct packet_type
*pt
);
1314 extern void dev_remove_pack(struct packet_type
*pt
);
1315 extern void __dev_remove_pack(struct packet_type
*pt
);
1317 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1318 unsigned short mask
);
1319 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1320 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1321 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1322 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1323 extern int dev_open(struct net_device
*dev
);
1324 extern int dev_close(struct net_device
*dev
);
1325 extern void dev_disable_lro(struct net_device
*dev
);
1326 extern int dev_queue_xmit(struct sk_buff
*skb
);
1327 extern int register_netdevice(struct net_device
*dev
);
1328 extern void unregister_netdevice_queue(struct net_device
*dev
,
1329 struct list_head
*head
);
1330 extern void unregister_netdevice_many(struct list_head
*head
);
1331 static inline void unregister_netdevice(struct net_device
*dev
)
1333 unregister_netdevice_queue(dev
, NULL
);
1336 extern int netdev_refcnt_read(const struct net_device
*dev
);
1337 extern void free_netdev(struct net_device
*dev
);
1338 extern void synchronize_net(void);
1339 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1340 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1341 extern int init_dummy_netdev(struct net_device
*dev
);
1342 extern void netdev_resync_ops(struct net_device
*dev
);
1344 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1345 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1346 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1347 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1348 extern int dev_restart(struct net_device
*dev
);
1349 #ifdef CONFIG_NETPOLL_TRAP
1350 extern int netpoll_trap(void);
1352 extern int skb_gro_receive(struct sk_buff
**head
,
1353 struct sk_buff
*skb
);
1354 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1356 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1358 return NAPI_GRO_CB(skb
)->data_offset
;
1361 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1363 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1366 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1368 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1371 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1372 unsigned int offset
)
1374 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1377 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1379 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1382 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1383 unsigned int offset
)
1385 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1386 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1387 return pskb_may_pull(skb
, hlen
) ? skb
->data
+ offset
: NULL
;
1390 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1392 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1395 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1397 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1398 skb_network_offset(skb
);
1401 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1402 unsigned short type
,
1403 const void *daddr
, const void *saddr
,
1406 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1409 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1412 static inline int dev_parse_header(const struct sk_buff
*skb
,
1413 unsigned char *haddr
)
1415 const struct net_device
*dev
= skb
->dev
;
1417 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1419 return dev
->header_ops
->parse(skb
, haddr
);
1422 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1423 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1424 static inline int unregister_gifconf(unsigned int family
)
1426 return register_gifconf(family
, NULL
);
1430 * Incoming packets are placed on per-cpu queues
1432 struct softnet_data
{
1433 struct Qdisc
*output_queue
;
1434 struct Qdisc
**output_queue_tailp
;
1435 struct list_head poll_list
;
1436 struct sk_buff
*completion_queue
;
1437 struct sk_buff_head process_queue
;
1440 unsigned int processed
;
1441 unsigned int time_squeeze
;
1442 unsigned int cpu_collision
;
1443 unsigned int received_rps
;
1446 struct softnet_data
*rps_ipi_list
;
1448 /* Elements below can be accessed between CPUs for RPS */
1449 struct call_single_data csd ____cacheline_aligned_in_smp
;
1450 struct softnet_data
*rps_ipi_next
;
1452 unsigned int input_queue_head
;
1453 unsigned int input_queue_tail
;
1456 struct sk_buff_head input_pkt_queue
;
1457 struct napi_struct backlog
;
1460 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1463 sd
->input_queue_head
++;
1467 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1468 unsigned int *qtail
)
1471 *qtail
= ++sd
->input_queue_tail
;
1475 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1477 #define HAVE_NETIF_QUEUE
1479 extern void __netif_schedule(struct Qdisc
*q
);
1481 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1483 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1484 __netif_schedule(txq
->qdisc
);
1487 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1491 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1492 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1495 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1497 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1501 * netif_start_queue - allow transmit
1502 * @dev: network device
1504 * Allow upper layers to call the device hard_start_xmit routine.
1506 static inline void netif_start_queue(struct net_device
*dev
)
1508 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1511 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1515 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1516 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1517 netif_tx_start_queue(txq
);
1521 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1523 #ifdef CONFIG_NETPOLL_TRAP
1524 if (netpoll_trap()) {
1525 netif_tx_start_queue(dev_queue
);
1529 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1530 __netif_schedule(dev_queue
->qdisc
);
1534 * netif_wake_queue - restart transmit
1535 * @dev: network device
1537 * Allow upper layers to call the device hard_start_xmit routine.
1538 * Used for flow control when transmit resources are available.
1540 static inline void netif_wake_queue(struct net_device
*dev
)
1542 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1545 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1549 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1550 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1551 netif_tx_wake_queue(txq
);
1555 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1557 if (WARN_ON(!dev_queue
)) {
1558 printk(KERN_INFO
"netif_stop_queue() cannot be called before "
1559 "register_netdev()");
1562 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1566 * netif_stop_queue - stop transmitted packets
1567 * @dev: network device
1569 * Stop upper layers calling the device hard_start_xmit routine.
1570 * Used for flow control when transmit resources are unavailable.
1572 static inline void netif_stop_queue(struct net_device
*dev
)
1574 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1577 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1581 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1582 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1583 netif_tx_stop_queue(txq
);
1587 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1589 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1593 * netif_queue_stopped - test if transmit queue is flowblocked
1594 * @dev: network device
1596 * Test if transmit queue on device is currently unable to send.
1598 static inline int netif_queue_stopped(const struct net_device
*dev
)
1600 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1603 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1605 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1609 * netif_running - test if up
1610 * @dev: network device
1612 * Test if the device has been brought up.
1614 static inline int netif_running(const struct net_device
*dev
)
1616 return test_bit(__LINK_STATE_START
, &dev
->state
);
1620 * Routines to manage the subqueues on a device. We only need start
1621 * stop, and a check if it's stopped. All other device management is
1622 * done at the overall netdevice level.
1623 * Also test the device if we're multiqueue.
1627 * netif_start_subqueue - allow sending packets on subqueue
1628 * @dev: network device
1629 * @queue_index: sub queue index
1631 * Start individual transmit queue of a device with multiple transmit queues.
1633 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1635 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1637 netif_tx_start_queue(txq
);
1641 * netif_stop_subqueue - stop sending packets on subqueue
1642 * @dev: network device
1643 * @queue_index: sub queue index
1645 * Stop individual transmit queue of a device with multiple transmit queues.
1647 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1649 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1650 #ifdef CONFIG_NETPOLL_TRAP
1654 netif_tx_stop_queue(txq
);
1658 * netif_subqueue_stopped - test status of subqueue
1659 * @dev: network device
1660 * @queue_index: sub queue index
1662 * Check individual transmit queue of a device with multiple transmit queues.
1664 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1667 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1669 return netif_tx_queue_stopped(txq
);
1672 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1673 struct sk_buff
*skb
)
1675 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1679 * netif_wake_subqueue - allow sending packets on subqueue
1680 * @dev: network device
1681 * @queue_index: sub queue index
1683 * Resume individual transmit queue of a device with multiple transmit queues.
1685 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1687 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1688 #ifdef CONFIG_NETPOLL_TRAP
1692 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1693 __netif_schedule(txq
->qdisc
);
1697 * netif_is_multiqueue - test if device has multiple transmit queues
1698 * @dev: network device
1700 * Check if device has multiple transmit queues
1702 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1704 return dev
->num_tx_queues
> 1;
1707 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
1711 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
1714 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
1721 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
1722 const struct net_device
*from_dev
)
1724 netif_set_real_num_tx_queues(to_dev
, from_dev
->real_num_tx_queues
);
1726 return netif_set_real_num_rx_queues(to_dev
,
1727 from_dev
->real_num_rx_queues
);
1733 /* Use this variant when it is known for sure that it
1734 * is executing from hardware interrupt context or with hardware interrupts
1737 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1739 /* Use this variant in places where it could be invoked
1740 * from either hardware interrupt or other context, with hardware interrupts
1741 * either disabled or enabled.
1743 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1745 #define HAVE_NETIF_RX 1
1746 extern int netif_rx(struct sk_buff
*skb
);
1747 extern int netif_rx_ni(struct sk_buff
*skb
);
1748 #define HAVE_NETIF_RECEIVE_SKB 1
1749 extern int netif_receive_skb(struct sk_buff
*skb
);
1750 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
1751 struct sk_buff
*skb
);
1752 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
1753 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
1754 struct sk_buff
*skb
);
1755 extern void napi_gro_flush(struct napi_struct
*napi
);
1756 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1757 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
1758 struct sk_buff
*skb
,
1760 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1761 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
1763 static inline void napi_free_frags(struct napi_struct
*napi
)
1765 kfree_skb(napi
->skb
);
1769 extern int netdev_rx_handler_register(struct net_device
*dev
,
1770 rx_handler_func_t
*rx_handler
,
1771 void *rx_handler_data
);
1772 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
1774 extern int dev_valid_name(const char *name
);
1775 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1776 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1777 extern unsigned dev_get_flags(const struct net_device
*);
1778 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
1779 extern int dev_change_flags(struct net_device
*, unsigned);
1780 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
1781 extern int dev_change_name(struct net_device
*, const char *);
1782 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1783 extern int dev_change_net_namespace(struct net_device
*,
1784 struct net
*, const char *);
1785 extern int dev_set_mtu(struct net_device
*, int);
1786 extern int dev_set_mac_address(struct net_device
*,
1788 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1789 struct net_device
*dev
,
1790 struct netdev_queue
*txq
);
1791 extern int dev_forward_skb(struct net_device
*dev
,
1792 struct sk_buff
*skb
);
1794 extern int netdev_budget
;
1796 /* Called by rtnetlink.c:rtnl_unlock() */
1797 extern void netdev_run_todo(void);
1800 * dev_put - release reference to device
1801 * @dev: network device
1803 * Release reference to device to allow it to be freed.
1805 static inline void dev_put(struct net_device
*dev
)
1807 irqsafe_cpu_dec(*dev
->pcpu_refcnt
);
1811 * dev_hold - get reference to device
1812 * @dev: network device
1814 * Hold reference to device to keep it from being freed.
1816 static inline void dev_hold(struct net_device
*dev
)
1818 irqsafe_cpu_inc(*dev
->pcpu_refcnt
);
1821 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1822 * and _off may be called from IRQ context, but it is caller
1823 * who is responsible for serialization of these calls.
1825 * The name carrier is inappropriate, these functions should really be
1826 * called netif_lowerlayer_*() because they represent the state of any
1827 * kind of lower layer not just hardware media.
1830 extern void linkwatch_fire_event(struct net_device
*dev
);
1831 extern void linkwatch_forget_dev(struct net_device
*dev
);
1834 * netif_carrier_ok - test if carrier present
1835 * @dev: network device
1837 * Check if carrier is present on device
1839 static inline int netif_carrier_ok(const struct net_device
*dev
)
1841 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1844 extern unsigned long dev_trans_start(struct net_device
*dev
);
1846 extern void __netdev_watchdog_up(struct net_device
*dev
);
1848 extern void netif_carrier_on(struct net_device
*dev
);
1850 extern void netif_carrier_off(struct net_device
*dev
);
1852 extern void netif_notify_peers(struct net_device
*dev
);
1855 * netif_dormant_on - mark device as dormant.
1856 * @dev: network device
1858 * Mark device as dormant (as per RFC2863).
1860 * The dormant state indicates that the relevant interface is not
1861 * actually in a condition to pass packets (i.e., it is not 'up') but is
1862 * in a "pending" state, waiting for some external event. For "on-
1863 * demand" interfaces, this new state identifies the situation where the
1864 * interface is waiting for events to place it in the up state.
1867 static inline void netif_dormant_on(struct net_device
*dev
)
1869 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1870 linkwatch_fire_event(dev
);
1874 * netif_dormant_off - set device as not dormant.
1875 * @dev: network device
1877 * Device is not in dormant state.
1879 static inline void netif_dormant_off(struct net_device
*dev
)
1881 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1882 linkwatch_fire_event(dev
);
1886 * netif_dormant - test if carrier present
1887 * @dev: network device
1889 * Check if carrier is present on device
1891 static inline int netif_dormant(const struct net_device
*dev
)
1893 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1898 * netif_oper_up - test if device is operational
1899 * @dev: network device
1901 * Check if carrier is operational
1903 static inline int netif_oper_up(const struct net_device
*dev
)
1905 return (dev
->operstate
== IF_OPER_UP
||
1906 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1910 * netif_device_present - is device available or removed
1911 * @dev: network device
1913 * Check if device has not been removed from system.
1915 static inline int netif_device_present(struct net_device
*dev
)
1917 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1920 extern void netif_device_detach(struct net_device
*dev
);
1922 extern void netif_device_attach(struct net_device
*dev
);
1925 * Network interface message level settings
1927 #define HAVE_NETIF_MSG 1
1930 NETIF_MSG_DRV
= 0x0001,
1931 NETIF_MSG_PROBE
= 0x0002,
1932 NETIF_MSG_LINK
= 0x0004,
1933 NETIF_MSG_TIMER
= 0x0008,
1934 NETIF_MSG_IFDOWN
= 0x0010,
1935 NETIF_MSG_IFUP
= 0x0020,
1936 NETIF_MSG_RX_ERR
= 0x0040,
1937 NETIF_MSG_TX_ERR
= 0x0080,
1938 NETIF_MSG_TX_QUEUED
= 0x0100,
1939 NETIF_MSG_INTR
= 0x0200,
1940 NETIF_MSG_TX_DONE
= 0x0400,
1941 NETIF_MSG_RX_STATUS
= 0x0800,
1942 NETIF_MSG_PKTDATA
= 0x1000,
1943 NETIF_MSG_HW
= 0x2000,
1944 NETIF_MSG_WOL
= 0x4000,
1947 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1948 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1949 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1950 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1951 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1952 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1953 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1954 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1955 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1956 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1957 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1958 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1959 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1960 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1961 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1963 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1966 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1967 return default_msg_enable_bits
;
1968 if (debug_value
== 0) /* no output */
1970 /* set low N bits */
1971 return (1 << debug_value
) - 1;
1974 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1976 spin_lock(&txq
->_xmit_lock
);
1977 txq
->xmit_lock_owner
= cpu
;
1980 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1982 spin_lock_bh(&txq
->_xmit_lock
);
1983 txq
->xmit_lock_owner
= smp_processor_id();
1986 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1988 int ok
= spin_trylock(&txq
->_xmit_lock
);
1990 txq
->xmit_lock_owner
= smp_processor_id();
1994 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1996 txq
->xmit_lock_owner
= -1;
1997 spin_unlock(&txq
->_xmit_lock
);
2000 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2002 txq
->xmit_lock_owner
= -1;
2003 spin_unlock_bh(&txq
->_xmit_lock
);
2006 static inline void txq_trans_update(struct netdev_queue
*txq
)
2008 if (txq
->xmit_lock_owner
!= -1)
2009 txq
->trans_start
= jiffies
;
2013 * netif_tx_lock - grab network device transmit lock
2014 * @dev: network device
2016 * Get network device transmit lock
2018 static inline void netif_tx_lock(struct net_device
*dev
)
2023 spin_lock(&dev
->tx_global_lock
);
2024 cpu
= smp_processor_id();
2025 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2026 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2028 /* We are the only thread of execution doing a
2029 * freeze, but we have to grab the _xmit_lock in
2030 * order to synchronize with threads which are in
2031 * the ->hard_start_xmit() handler and already
2032 * checked the frozen bit.
2034 __netif_tx_lock(txq
, cpu
);
2035 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2036 __netif_tx_unlock(txq
);
2040 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2046 static inline void netif_tx_unlock(struct net_device
*dev
)
2050 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2051 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2053 /* No need to grab the _xmit_lock here. If the
2054 * queue is not stopped for another reason, we
2057 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2058 netif_schedule_queue(txq
);
2060 spin_unlock(&dev
->tx_global_lock
);
2063 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2065 netif_tx_unlock(dev
);
2069 #define HARD_TX_LOCK(dev, txq, cpu) { \
2070 if ((dev->features & NETIF_F_LLTX) == 0) { \
2071 __netif_tx_lock(txq, cpu); \
2075 #define HARD_TX_UNLOCK(dev, txq) { \
2076 if ((dev->features & NETIF_F_LLTX) == 0) { \
2077 __netif_tx_unlock(txq); \
2081 static inline void netif_tx_disable(struct net_device
*dev
)
2087 cpu
= smp_processor_id();
2088 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2089 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2091 __netif_tx_lock(txq
, cpu
);
2092 netif_tx_stop_queue(txq
);
2093 __netif_tx_unlock(txq
);
2098 static inline void netif_addr_lock(struct net_device
*dev
)
2100 spin_lock(&dev
->addr_list_lock
);
2103 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2105 spin_lock_bh(&dev
->addr_list_lock
);
2108 static inline void netif_addr_unlock(struct net_device
*dev
)
2110 spin_unlock(&dev
->addr_list_lock
);
2113 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2115 spin_unlock_bh(&dev
->addr_list_lock
);
2119 * dev_addrs walker. Should be used only for read access. Call with
2120 * rcu_read_lock held.
2122 #define for_each_dev_addr(dev, ha) \
2123 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2125 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2127 extern void ether_setup(struct net_device
*dev
);
2129 /* Support for loadable net-drivers */
2130 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
2131 void (*setup
)(struct net_device
*),
2132 unsigned int queue_count
);
2133 #define alloc_netdev(sizeof_priv, name, setup) \
2134 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2135 extern int register_netdev(struct net_device
*dev
);
2136 extern void unregister_netdev(struct net_device
*dev
);
2138 /* General hardware address lists handling functions */
2139 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2140 struct netdev_hw_addr_list
*from_list
,
2141 int addr_len
, unsigned char addr_type
);
2142 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2143 struct netdev_hw_addr_list
*from_list
,
2144 int addr_len
, unsigned char addr_type
);
2145 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2146 struct netdev_hw_addr_list
*from_list
,
2148 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2149 struct netdev_hw_addr_list
*from_list
,
2151 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2152 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2154 /* Functions used for device addresses handling */
2155 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2156 unsigned char addr_type
);
2157 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2158 unsigned char addr_type
);
2159 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2160 struct net_device
*from_dev
,
2161 unsigned char addr_type
);
2162 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2163 struct net_device
*from_dev
,
2164 unsigned char addr_type
);
2165 extern void dev_addr_flush(struct net_device
*dev
);
2166 extern int dev_addr_init(struct net_device
*dev
);
2168 /* Functions used for unicast addresses handling */
2169 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2170 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2171 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2172 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2173 extern void dev_uc_flush(struct net_device
*dev
);
2174 extern void dev_uc_init(struct net_device
*dev
);
2176 /* Functions used for multicast addresses handling */
2177 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2178 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2179 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2180 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2181 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2182 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2183 extern void dev_mc_flush(struct net_device
*dev
);
2184 extern void dev_mc_init(struct net_device
*dev
);
2186 /* Functions used for secondary unicast and multicast support */
2187 extern void dev_set_rx_mode(struct net_device
*dev
);
2188 extern void __dev_set_rx_mode(struct net_device
*dev
);
2189 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2190 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2191 extern void netdev_state_change(struct net_device
*dev
);
2192 extern int netdev_bonding_change(struct net_device
*dev
,
2193 unsigned long event
);
2194 extern void netdev_features_change(struct net_device
*dev
);
2195 /* Load a device via the kmod */
2196 extern void dev_load(struct net
*net
, const char *name
);
2197 extern void dev_mcast_init(void);
2198 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2199 struct rtnl_link_stats64
*storage
);
2200 extern void dev_txq_stats_fold(const struct net_device
*dev
,
2201 struct rtnl_link_stats64
*stats
);
2203 extern int netdev_max_backlog
;
2204 extern int netdev_tstamp_prequeue
;
2205 extern int weight_p
;
2206 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2207 extern int skb_checksum_help(struct sk_buff
*skb
);
2208 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
2210 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2212 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2216 /* rx skb timestamps */
2217 extern void net_enable_timestamp(void);
2218 extern void net_disable_timestamp(void);
2220 #ifdef CONFIG_PROC_FS
2221 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2222 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2223 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2226 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2227 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2229 extern struct kobj_ns_type_operations net_ns_type_operations
;
2231 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
2233 extern void linkwatch_run_queue(void);
2235 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
2236 unsigned long mask
);
2237 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
2239 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2240 struct net_device
*dev
);
2242 static inline int net_gso_ok(int features
, int gso_type
)
2244 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2245 return (features
& feature
) == feature
;
2248 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
2250 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2251 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2254 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
2256 if (skb_is_gso(skb
)) {
2257 int features
= dev
->features
;
2259 if (skb
->protocol
== htons(ETH_P_8021Q
) || skb
->vlan_tci
)
2260 features
&= dev
->vlan_features
;
2262 return (!skb_gso_ok(skb
, features
) ||
2263 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
2269 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2272 dev
->gso_max_size
= size
;
2275 extern int __skb_bond_should_drop(struct sk_buff
*skb
,
2276 struct net_device
*master
);
2278 static inline int skb_bond_should_drop(struct sk_buff
*skb
,
2279 struct net_device
*master
)
2282 return __skb_bond_should_drop(skb
, master
);
2286 extern struct pernet_operations __net_initdata loopback_net_ops
;
2288 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
2289 struct ethtool_cmd
*cmd
)
2291 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
2293 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
2296 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
2298 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
2300 return dev
->ethtool_ops
->get_rx_csum(dev
);
2303 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
2305 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
2307 return dev
->ethtool_ops
->get_flags(dev
);
2310 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2312 /* netdev_printk helpers, similar to dev_printk */
2314 static inline const char *netdev_name(const struct net_device
*dev
)
2316 if (dev
->reg_state
!= NETREG_REGISTERED
)
2317 return "(unregistered net_device)";
2321 extern int netdev_printk(const char *level
, const struct net_device
*dev
,
2322 const char *format
, ...)
2323 __attribute__ ((format (printf
, 3, 4)));
2324 extern int netdev_emerg(const struct net_device
*dev
, const char *format
, ...)
2325 __attribute__ ((format (printf
, 2, 3)));
2326 extern int netdev_alert(const struct net_device
*dev
, const char *format
, ...)
2327 __attribute__ ((format (printf
, 2, 3)));
2328 extern int netdev_crit(const struct net_device
*dev
, const char *format
, ...)
2329 __attribute__ ((format (printf
, 2, 3)));
2330 extern int netdev_err(const struct net_device
*dev
, const char *format
, ...)
2331 __attribute__ ((format (printf
, 2, 3)));
2332 extern int netdev_warn(const struct net_device
*dev
, const char *format
, ...)
2333 __attribute__ ((format (printf
, 2, 3)));
2334 extern int netdev_notice(const struct net_device
*dev
, const char *format
, ...)
2335 __attribute__ ((format (printf
, 2, 3)));
2336 extern int netdev_info(const struct net_device
*dev
, const char *format
, ...)
2337 __attribute__ ((format (printf
, 2, 3)));
2340 #define netdev_dbg(__dev, format, args...) \
2341 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2342 #elif defined(CONFIG_DYNAMIC_DEBUG)
2343 #define netdev_dbg(__dev, format, args...) \
2345 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2346 netdev_name(__dev), ##args); \
2349 #define netdev_dbg(__dev, format, args...) \
2352 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2357 #if defined(VERBOSE_DEBUG)
2358 #define netdev_vdbg netdev_dbg
2361 #define netdev_vdbg(dev, format, args...) \
2364 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2370 * netdev_WARN() acts like dev_printk(), but with the key difference
2371 * of using a WARN/WARN_ON to get the message out, including the
2372 * file/line information and a backtrace.
2374 #define netdev_WARN(dev, format, args...) \
2375 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2377 /* netif printk helpers, similar to netdev_printk */
2379 #define netif_printk(priv, type, level, dev, fmt, args...) \
2381 if (netif_msg_##type(priv)) \
2382 netdev_printk(level, (dev), fmt, ##args); \
2385 #define netif_level(level, priv, type, dev, fmt, args...) \
2387 if (netif_msg_##type(priv)) \
2388 netdev_##level(dev, fmt, ##args); \
2391 #define netif_emerg(priv, type, dev, fmt, args...) \
2392 netif_level(emerg, priv, type, dev, fmt, ##args)
2393 #define netif_alert(priv, type, dev, fmt, args...) \
2394 netif_level(alert, priv, type, dev, fmt, ##args)
2395 #define netif_crit(priv, type, dev, fmt, args...) \
2396 netif_level(crit, priv, type, dev, fmt, ##args)
2397 #define netif_err(priv, type, dev, fmt, args...) \
2398 netif_level(err, priv, type, dev, fmt, ##args)
2399 #define netif_warn(priv, type, dev, fmt, args...) \
2400 netif_level(warn, priv, type, dev, fmt, ##args)
2401 #define netif_notice(priv, type, dev, fmt, args...) \
2402 netif_level(notice, priv, type, dev, fmt, ##args)
2403 #define netif_info(priv, type, dev, fmt, args...) \
2404 netif_level(info, priv, type, dev, fmt, ##args)
2407 #define netif_dbg(priv, type, dev, format, args...) \
2408 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2409 #elif defined(CONFIG_DYNAMIC_DEBUG)
2410 #define netif_dbg(priv, type, netdev, format, args...) \
2412 if (netif_msg_##type(priv)) \
2413 dynamic_dev_dbg((netdev)->dev.parent, \
2415 netdev_name(netdev), ##args); \
2418 #define netif_dbg(priv, type, dev, format, args...) \
2421 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2426 #if defined(VERBOSE_DEBUG)
2427 #define netif_vdbg netif_dbg
2429 #define netif_vdbg(priv, type, dev, format, args...) \
2432 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2437 #endif /* __KERNEL__ */
2439 #endif /* _LINUX_NETDEVICE_H */