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>
33 #include <linux/timer.h>
34 #include <linux/delay.h>
36 #include <asm/atomic.h>
37 #include <asm/cache.h>
38 #include <asm/byteorder.h>
40 #include <linux/device.h>
41 #include <linux/percpu.h>
42 #include <linux/rculist.h>
43 #include <linux/dmaengine.h>
44 #include <linux/workqueue.h>
46 #include <linux/ethtool.h>
47 #include <net/net_namespace.h>
50 #include <net/dcbnl.h>
57 /* source back-compat hooks */
58 #define SET_ETHTOOL_OPS(netdev,ops) \
59 ( (netdev)->ethtool_ops = (ops) )
61 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
62 functions are available. */
63 #define HAVE_FREE_NETDEV /* free_netdev() */
64 #define HAVE_NETDEV_PRIV /* netdev_priv() */
66 #define NET_XMIT_SUCCESS 0
67 #define NET_XMIT_DROP 1 /* skb dropped */
68 #define NET_XMIT_CN 2 /* congestion notification */
69 #define NET_XMIT_POLICED 3 /* skb is shot by police */
70 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
72 /* Backlog congestion levels */
73 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
74 #define NET_RX_DROP 1 /* packet dropped */
75 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
76 #define NET_RX_CN_MOD 3 /* Storm on its way! */
77 #define NET_RX_CN_HIGH 4 /* The storm is here */
78 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
80 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
81 * indicates that the device will soon be dropping packets, or already drops
82 * some packets of the same priority; prompting us to send less aggressively. */
83 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
84 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
88 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
90 /* Driver transmit return codes */
91 #define NETDEV_TX_OK 0 /* driver took care of packet */
92 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
93 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
98 * Compute the worst case header length according to the protocols
102 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
103 # if defined(CONFIG_MAC80211_MESH)
104 # define LL_MAX_HEADER 128
106 # define LL_MAX_HEADER 96
108 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
109 # define LL_MAX_HEADER 48
111 # define LL_MAX_HEADER 32
114 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
115 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
116 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
117 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
118 #define MAX_HEADER LL_MAX_HEADER
120 #define MAX_HEADER (LL_MAX_HEADER + 48)
123 #endif /* __KERNEL__ */
126 * Network device statistics. Akin to the 2.0 ether stats but
127 * with byte counters.
130 struct net_device_stats
132 unsigned long rx_packets
; /* total packets received */
133 unsigned long tx_packets
; /* total packets transmitted */
134 unsigned long rx_bytes
; /* total bytes received */
135 unsigned long tx_bytes
; /* total bytes transmitted */
136 unsigned long rx_errors
; /* bad packets received */
137 unsigned long tx_errors
; /* packet transmit problems */
138 unsigned long rx_dropped
; /* no space in linux buffers */
139 unsigned long tx_dropped
; /* no space available in linux */
140 unsigned long multicast
; /* multicast packets received */
141 unsigned long collisions
;
143 /* detailed rx_errors: */
144 unsigned long rx_length_errors
;
145 unsigned long rx_over_errors
; /* receiver ring buff overflow */
146 unsigned long rx_crc_errors
; /* recved pkt with crc error */
147 unsigned long rx_frame_errors
; /* recv'd frame alignment error */
148 unsigned long rx_fifo_errors
; /* recv'r fifo overrun */
149 unsigned long rx_missed_errors
; /* receiver missed packet */
151 /* detailed tx_errors */
152 unsigned long tx_aborted_errors
;
153 unsigned long tx_carrier_errors
;
154 unsigned long tx_fifo_errors
;
155 unsigned long tx_heartbeat_errors
;
156 unsigned long tx_window_errors
;
159 unsigned long rx_compressed
;
160 unsigned long tx_compressed
;
164 /* Media selection options. */
177 #include <linux/cache.h>
178 #include <linux/skbuff.h>
184 struct netif_rx_stats
188 unsigned time_squeeze
;
189 unsigned cpu_collision
;
192 DECLARE_PER_CPU(struct netif_rx_stats
, netdev_rx_stat
);
196 struct dev_addr_list
*next
;
197 u8 da_addr
[MAX_ADDR_LEN
];
205 * We tag multicasts with these structures.
208 #define dev_mc_list dev_addr_list
209 #define dmi_addr da_addr
210 #define dmi_addrlen da_addrlen
211 #define dmi_users da_users
212 #define dmi_gusers da_gusers
214 struct netdev_hw_addr
{
215 struct list_head list
;
216 unsigned char addr
[MAX_ADDR_LEN
];
218 #define NETDEV_HW_ADDR_T_LAN 1
219 #define NETDEV_HW_ADDR_T_SAN 2
220 #define NETDEV_HW_ADDR_T_SLAVE 3
221 struct rcu_head rcu_head
;
226 struct hh_cache
*hh_next
; /* Next entry */
227 atomic_t hh_refcnt
; /* number of users */
229 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
231 * They are mostly read, but hh_refcnt may be changed quite frequently,
232 * incurring cache line ping pongs.
234 __be16 hh_type ____cacheline_aligned_in_smp
;
235 /* protocol identifier, f.e ETH_P_IP
236 * NOTE: For VLANs, this will be the
237 * encapuslated type. --BLG
239 u16 hh_len
; /* length of header */
240 int (*hh_output
)(struct sk_buff
*skb
);
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
263 #define LL_RESERVED_SPACE(dev) \
264 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
265 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
266 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 #define LL_ALLOCATED_SPACE(dev) \
268 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
271 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
272 unsigned short type
, const void *daddr
,
273 const void *saddr
, unsigned len
);
274 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
275 int (*rebuild
)(struct sk_buff
*skb
);
276 #define HAVE_HEADER_CACHE
277 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
278 void (*cache_update
)(struct hh_cache
*hh
,
279 const struct net_device
*dev
,
280 const unsigned char *haddr
);
283 /* These flag bits are private to the generic network queueing
284 * layer, they may not be explicitly referenced by any other
291 __LINK_STATE_PRESENT
,
292 __LINK_STATE_NOCARRIER
,
293 __LINK_STATE_LINKWATCH_PENDING
,
294 __LINK_STATE_DORMANT
,
299 * This structure holds at boot time configured netdevice settings. They
300 * are then used in the device probing.
302 struct netdev_boot_setup
{
306 #define NETDEV_BOOT_SETUP_MAX 8
308 extern int __init
netdev_boot_setup(char *str
);
311 * Structure for NAPI scheduling similar to tasklet but with weighting
314 /* The poll_list must only be managed by the entity which
315 * changes the state of the NAPI_STATE_SCHED bit. This means
316 * whoever atomically sets that bit can add this napi_struct
317 * to the per-cpu poll_list, and whoever clears that bit
318 * can remove from the list right before clearing the bit.
320 struct list_head poll_list
;
324 int (*poll
)(struct napi_struct
*, int);
325 #ifdef CONFIG_NETPOLL
326 spinlock_t poll_lock
;
330 unsigned int gro_count
;
332 struct net_device
*dev
;
333 struct list_head dev_list
;
334 struct sk_buff
*gro_list
;
340 NAPI_STATE_SCHED
, /* Poll is scheduled */
341 NAPI_STATE_DISABLE
, /* Disable pending */
342 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
353 extern void __napi_schedule(struct napi_struct
*n
);
355 static inline int napi_disable_pending(struct napi_struct
*n
)
357 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
361 * napi_schedule_prep - check if napi can be scheduled
364 * Test if NAPI routine is already running, and if not mark
365 * it as running. This is used as a condition variable
366 * insure only one NAPI poll instance runs. We also make
367 * sure there is no pending NAPI disable.
369 static inline int napi_schedule_prep(struct napi_struct
*n
)
371 return !napi_disable_pending(n
) &&
372 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
376 * napi_schedule - schedule NAPI poll
379 * Schedule NAPI poll routine to be called if it is not already
382 static inline void napi_schedule(struct napi_struct
*n
)
384 if (napi_schedule_prep(n
))
388 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
389 static inline int napi_reschedule(struct napi_struct
*napi
)
391 if (napi_schedule_prep(napi
)) {
392 __napi_schedule(napi
);
399 * napi_complete - NAPI processing complete
402 * Mark NAPI processing as complete.
404 extern void __napi_complete(struct napi_struct
*n
);
405 extern void napi_complete(struct napi_struct
*n
);
408 * napi_disable - prevent NAPI from scheduling
411 * Stop NAPI from being scheduled on this context.
412 * Waits till any outstanding processing completes.
414 static inline void napi_disable(struct napi_struct
*n
)
416 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
417 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
419 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
423 * napi_enable - enable NAPI scheduling
426 * Resume NAPI from being scheduled on this context.
427 * Must be paired with napi_disable.
429 static inline void napi_enable(struct napi_struct
*n
)
431 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
432 smp_mb__before_clear_bit();
433 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
438 * napi_synchronize - wait until NAPI is not running
441 * Wait until NAPI is done being scheduled on this context.
442 * Waits till any outstanding processing completes but
443 * does not disable future activations.
445 static inline void napi_synchronize(const struct napi_struct
*n
)
447 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
451 # define napi_synchronize(n) barrier()
454 enum netdev_queue_state_t
457 __QUEUE_STATE_FROZEN
,
460 struct netdev_queue
{
464 struct net_device
*dev
;
467 struct Qdisc
*qdisc_sleeping
;
471 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
474 * please use this field instead of dev->trans_start
476 unsigned long trans_start
;
477 } ____cacheline_aligned_in_smp
;
481 * This structure defines the management hooks for network devices.
482 * The following hooks can be defined; unless noted otherwise, they are
483 * optional and can be filled with a null pointer.
485 * int (*ndo_init)(struct net_device *dev);
486 * This function is called once when network device is registered.
487 * The network device can use this to any late stage initializaton
488 * or semantic validattion. It can fail with an error code which will
489 * be propogated back to register_netdev
491 * void (*ndo_uninit)(struct net_device *dev);
492 * This function is called when device is unregistered or when registration
493 * fails. It is not called if init fails.
495 * int (*ndo_open)(struct net_device *dev);
496 * This function is called when network device transistions to the up
499 * int (*ndo_stop)(struct net_device *dev);
500 * This function is called when network device transistions to the down
503 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
504 * Called when a packet needs to be transmitted.
505 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
506 * Required can not be NULL.
508 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
509 * Called to decide which queue to when device supports multiple
512 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
513 * This function is called to allow device receiver to make
514 * changes to configuration when multicast or promiscious is enabled.
516 * void (*ndo_set_rx_mode)(struct net_device *dev);
517 * This function is called device changes address list filtering.
519 * void (*ndo_set_multicast_list)(struct net_device *dev);
520 * This function is called when the multicast address list changes.
522 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
523 * This function is called when the Media Access Control address
524 * needs to be changed. If this interface is not defined, the
525 * mac address can not be changed.
527 * int (*ndo_validate_addr)(struct net_device *dev);
528 * Test if Media Access Control address is valid for the device.
530 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
531 * Called when a user request an ioctl which can't be handled by
532 * the generic interface code. If not defined ioctl's return
533 * not supported error code.
535 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
536 * Used to set network devices bus interface parameters. This interface
537 * is retained for legacy reason, new devices should use the bus
538 * interface (PCI) for low level management.
540 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
541 * Called when a user wants to change the Maximum Transfer Unit
542 * of a device. If not defined, any request to change MTU will
543 * will return an error.
545 * void (*ndo_tx_timeout)(struct net_device *dev);
546 * Callback uses when the transmitter has not made any progress
547 * for dev->watchdog ticks.
549 * struct net_device_stats* (*get_stats)(struct net_device *dev);
550 * Called when a user wants to get the network device usage
551 * statistics. If not defined, the counters in dev->stats will
554 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
555 * If device support VLAN receive accleration
556 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
557 * when vlan groups for the device changes. Note: grp is NULL
558 * if no vlan's groups are being used.
560 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
561 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
562 * this function is called when a VLAN id is registered.
564 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
565 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
566 * this function is called when a VLAN id is unregistered.
568 * void (*ndo_poll_controller)(struct net_device *dev);
570 #define HAVE_NET_DEVICE_OPS
571 struct net_device_ops
{
572 int (*ndo_init
)(struct net_device
*dev
);
573 void (*ndo_uninit
)(struct net_device
*dev
);
574 int (*ndo_open
)(struct net_device
*dev
);
575 int (*ndo_stop
)(struct net_device
*dev
);
576 int (*ndo_start_xmit
) (struct sk_buff
*skb
,
577 struct net_device
*dev
);
578 u16 (*ndo_select_queue
)(struct net_device
*dev
,
579 struct sk_buff
*skb
);
580 #define HAVE_CHANGE_RX_FLAGS
581 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
583 #define HAVE_SET_RX_MODE
584 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
585 #define HAVE_MULTICAST
586 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
587 #define HAVE_SET_MAC_ADDR
588 int (*ndo_set_mac_address
)(struct net_device
*dev
,
590 #define HAVE_VALIDATE_ADDR
591 int (*ndo_validate_addr
)(struct net_device
*dev
);
592 #define HAVE_PRIVATE_IOCTL
593 int (*ndo_do_ioctl
)(struct net_device
*dev
,
594 struct ifreq
*ifr
, int cmd
);
595 #define HAVE_SET_CONFIG
596 int (*ndo_set_config
)(struct net_device
*dev
,
598 #define HAVE_CHANGE_MTU
599 int (*ndo_change_mtu
)(struct net_device
*dev
,
601 int (*ndo_neigh_setup
)(struct net_device
*dev
,
602 struct neigh_parms
*);
603 #define HAVE_TX_TIMEOUT
604 void (*ndo_tx_timeout
) (struct net_device
*dev
);
606 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
608 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
609 struct vlan_group
*grp
);
610 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
612 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
614 #ifdef CONFIG_NET_POLL_CONTROLLER
615 #define HAVE_NETDEV_POLL
616 void (*ndo_poll_controller
)(struct net_device
*dev
);
618 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
619 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
621 struct scatterlist
*sgl
,
623 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
629 * The DEVICE structure.
630 * Actually, this whole structure is a big mistake. It mixes I/O
631 * data with strictly "high-level" data, and it has to know about
632 * almost every data structure used in the INET module.
634 * FIXME: cleanup struct net_device such that network protocol info
642 * This is the first field of the "visible" part of this structure
643 * (i.e. as seen by users in the "Space.c" file). It is the name
647 /* device name hash chain */
648 struct hlist_node name_hlist
;
653 * I/O specific fields
654 * FIXME: Merge these and struct ifmap into one
656 unsigned long mem_end
; /* shared mem end */
657 unsigned long mem_start
; /* shared mem start */
658 unsigned long base_addr
; /* device I/O address */
659 unsigned int irq
; /* device IRQ number */
662 * Some hardware also needs these fields, but they are not
663 * part of the usual set specified in Space.c.
666 unsigned char if_port
; /* Selectable AUI, TP,..*/
667 unsigned char dma
; /* DMA channel */
671 struct list_head dev_list
;
672 struct list_head napi_list
;
674 /* Net device features */
675 unsigned long features
;
676 #define NETIF_F_SG 1 /* Scatter/gather IO. */
677 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
678 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
679 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
680 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
681 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
682 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
683 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
684 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
685 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
686 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
687 #define NETIF_F_GSO 2048 /* Enable software GSO. */
688 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
689 /* do not use LLTX in new drivers */
690 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
691 #define NETIF_F_GRO 16384 /* Generic receive offload */
692 #define NETIF_F_LRO 32768 /* large receive offload */
694 /* the GSO_MASK reserves bits 16 through 23 */
695 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
696 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
698 /* Segmentation offload features */
699 #define NETIF_F_GSO_SHIFT 16
700 #define NETIF_F_GSO_MASK 0x00ff0000
701 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
702 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
703 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
704 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
705 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
706 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
708 /* List of features with software fallbacks. */
709 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
712 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
713 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
714 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
715 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
718 * If one device supports one of these features, then enable them
719 * for all in netdev_increment_features.
721 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
722 NETIF_F_SG | NETIF_F_HIGHDMA | \
725 /* Interface index. Unique device identifier */
729 struct net_device_stats stats
;
731 #ifdef CONFIG_WIRELESS_EXT
732 /* List of functions to handle Wireless Extensions (instead of ioctl).
733 * See <net/iw_handler.h> for details. Jean II */
734 const struct iw_handler_def
* wireless_handlers
;
735 /* Instance data managed by the core of Wireless Extensions. */
736 struct iw_public_data
* wireless_data
;
738 /* Management operations */
739 const struct net_device_ops
*netdev_ops
;
740 const struct ethtool_ops
*ethtool_ops
;
742 /* Hardware header description */
743 const struct header_ops
*header_ops
;
745 unsigned int flags
; /* interface flags (a la BSD) */
746 unsigned short gflags
;
747 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
748 unsigned short padded
; /* How much padding added by alloc_netdev() */
750 unsigned char operstate
; /* RFC2863 operstate */
751 unsigned char link_mode
; /* mapping policy to operstate */
753 unsigned mtu
; /* interface MTU value */
754 unsigned short type
; /* interface hardware type */
755 unsigned short hard_header_len
; /* hardware hdr length */
757 /* extra head- and tailroom the hardware may need, but not in all cases
758 * can this be guaranteed, especially tailroom. Some cases also use
759 * LL_MAX_HEADER instead to allocate the skb.
761 unsigned short needed_headroom
;
762 unsigned short needed_tailroom
;
764 struct net_device
*master
; /* Pointer to master device of a group,
765 * which this device is member of.
768 /* Interface address info. */
769 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
770 unsigned char addr_len
; /* hardware address length */
771 unsigned short dev_id
; /* for shared network cards */
773 spinlock_t addr_list_lock
;
774 struct dev_addr_list
*uc_list
; /* Secondary unicast mac addresses */
775 int uc_count
; /* Number of installed ucasts */
777 struct dev_addr_list
*mc_list
; /* Multicast mac addresses */
778 int mc_count
; /* Number of installed mcasts */
779 unsigned int promiscuity
;
780 unsigned int allmulti
;
783 /* Protocol specific pointers */
785 #ifdef CONFIG_NET_DSA
786 void *dsa_ptr
; /* dsa specific data */
788 void *atalk_ptr
; /* AppleTalk link */
789 void *ip_ptr
; /* IPv4 specific data */
790 void *dn_ptr
; /* DECnet specific data */
791 void *ip6_ptr
; /* IPv6 specific data */
792 void *ec_ptr
; /* Econet specific data */
793 void *ax25_ptr
; /* AX.25 specific data */
794 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
795 assign before registering */
798 * Cache line mostly used on receive path (including eth_type_trans())
800 unsigned long last_rx
; /* Time of last Rx */
801 /* Interface address info used in eth_type_trans() */
802 unsigned char *dev_addr
; /* hw address, (before bcast
803 because most packets are
806 struct list_head dev_addr_list
; /* list of device hw addresses */
808 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
810 struct netdev_queue rx_queue
;
812 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
814 /* Number of TX queues allocated at alloc_netdev_mq() time */
815 unsigned int num_tx_queues
;
817 /* Number of TX queues currently active in device */
818 unsigned int real_num_tx_queues
;
820 unsigned long tx_queue_len
; /* Max frames per queue allowed */
821 spinlock_t tx_global_lock
;
823 * One part is mostly used on xmit path (device)
825 /* These may be needed for future network-power-down code. */
828 * trans_start here is expensive for high speed devices on SMP,
829 * please use netdev_queue->trans_start instead.
831 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
833 int watchdog_timeo
; /* used by dev_watchdog() */
834 struct timer_list watchdog_timer
;
836 /* Number of references to this device */
837 atomic_t refcnt ____cacheline_aligned_in_smp
;
839 /* delayed register/unregister */
840 struct list_head todo_list
;
841 /* device index hash chain */
842 struct hlist_node index_hlist
;
844 struct net_device
*link_watch_next
;
846 /* register/unregister state machine */
847 enum { NETREG_UNINITIALIZED
=0,
848 NETREG_REGISTERED
, /* completed register_netdevice */
849 NETREG_UNREGISTERING
, /* called unregister_netdevice */
850 NETREG_UNREGISTERED
, /* completed unregister todo */
851 NETREG_RELEASED
, /* called free_netdev */
852 NETREG_DUMMY
, /* dummy device for NAPI poll */
855 /* Called from unregister, can be used to call free_netdev */
856 void (*destructor
)(struct net_device
*dev
);
858 #ifdef CONFIG_NETPOLL
859 struct netpoll_info
*npinfo
;
863 /* Network namespace this network device is inside */
867 /* mid-layer private */
871 struct net_bridge_port
*br_port
;
873 struct macvlan_port
*macvlan_port
;
875 struct garp_port
*garp_port
;
877 /* class/net/name entry */
879 /* space for optional statistics and wireless sysfs groups */
880 struct attribute_group
*sysfs_groups
[3];
882 /* rtnetlink link ops */
883 const struct rtnl_link_ops
*rtnl_link_ops
;
885 /* VLAN feature mask */
886 unsigned long vlan_features
;
888 /* for setting kernel sock attribute on TCP connection setup */
889 #define GSO_MAX_SIZE 65536
890 unsigned int gso_max_size
;
893 /* Data Center Bridging netlink ops */
894 struct dcbnl_rtnl_ops
*dcbnl_ops
;
897 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
898 /* max exchange id for FCoE LRO by ddp */
899 unsigned int fcoe_ddp_xid
;
902 #ifdef CONFIG_COMPAT_NET_DEV_OPS
904 int (*init
)(struct net_device
*dev
);
905 void (*uninit
)(struct net_device
*dev
);
906 int (*open
)(struct net_device
*dev
);
907 int (*stop
)(struct net_device
*dev
);
908 int (*hard_start_xmit
) (struct sk_buff
*skb
,
909 struct net_device
*dev
);
910 u16 (*select_queue
)(struct net_device
*dev
,
911 struct sk_buff
*skb
);
912 void (*change_rx_flags
)(struct net_device
*dev
,
914 void (*set_rx_mode
)(struct net_device
*dev
);
915 void (*set_multicast_list
)(struct net_device
*dev
);
916 int (*set_mac_address
)(struct net_device
*dev
,
918 int (*validate_addr
)(struct net_device
*dev
);
919 int (*do_ioctl
)(struct net_device
*dev
,
920 struct ifreq
*ifr
, int cmd
);
921 int (*set_config
)(struct net_device
*dev
,
923 int (*change_mtu
)(struct net_device
*dev
, int new_mtu
);
924 int (*neigh_setup
)(struct net_device
*dev
,
925 struct neigh_parms
*);
926 void (*tx_timeout
) (struct net_device
*dev
);
927 struct net_device_stats
* (*get_stats
)(struct net_device
*dev
);
928 void (*vlan_rx_register
)(struct net_device
*dev
,
929 struct vlan_group
*grp
);
930 void (*vlan_rx_add_vid
)(struct net_device
*dev
,
932 void (*vlan_rx_kill_vid
)(struct net_device
*dev
,
934 #ifdef CONFIG_NET_POLL_CONTROLLER
935 void (*poll_controller
)(struct net_device
*dev
);
940 #define to_net_dev(d) container_of(d, struct net_device, dev)
942 #define NETDEV_ALIGN 32
943 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
946 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
949 return &dev
->_tx
[index
];
952 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
953 void (*f
)(struct net_device
*,
954 struct netdev_queue
*,
960 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
961 f(dev
, &dev
->_tx
[i
], arg
);
965 * Net namespace inlines
968 struct net
*dev_net(const struct net_device
*dev
)
978 void dev_net_set(struct net_device
*dev
, struct net
*net
)
981 release_net(dev
->nd_net
);
982 dev
->nd_net
= hold_net(net
);
986 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
988 #ifdef CONFIG_NET_DSA_TAG_DSA
989 if (dev
->dsa_ptr
!= NULL
)
990 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
996 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
998 #ifdef CONFIG_NET_DSA_TAG_TRAILER
999 if (dev
->dsa_ptr
!= NULL
)
1000 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1007 * netdev_priv - access network device private data
1008 * @dev: network device
1010 * Get network device private data
1012 static inline void *netdev_priv(const struct net_device
*dev
)
1014 return (char *)dev
+ ((sizeof(struct net_device
)
1015 + NETDEV_ALIGN_CONST
)
1016 & ~NETDEV_ALIGN_CONST
);
1019 /* Set the sysfs physical device reference for the network logical device
1020 * if set prior to registration will cause a symlink during initialization.
1022 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1025 * netif_napi_add - initialize a napi context
1026 * @dev: network device
1027 * @napi: napi context
1028 * @poll: polling function
1029 * @weight: default weight
1031 * netif_napi_add() must be used to initialize a napi context prior to calling
1032 * *any* of the other napi related functions.
1034 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1035 int (*poll
)(struct napi_struct
*, int), int weight
);
1038 * netif_napi_del - remove a napi context
1039 * @napi: napi context
1041 * netif_napi_del() removes a napi context from the network device napi list
1043 void netif_napi_del(struct napi_struct
*napi
);
1045 struct napi_gro_cb
{
1046 /* This indicates where we are processing relative to skb->data. */
1049 /* This is non-zero if the packet may be of the same flow. */
1052 /* This is non-zero if the packet cannot be merged with the new skb. */
1055 /* Number of segments aggregated. */
1062 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1064 struct packet_type
{
1065 __be16 type
; /* This is really htons(ether_type). */
1066 struct net_device
*dev
; /* NULL is wildcarded here */
1067 int (*func
) (struct sk_buff
*,
1068 struct net_device
*,
1069 struct packet_type
*,
1070 struct net_device
*);
1071 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1073 int (*gso_send_check
)(struct sk_buff
*skb
);
1074 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1075 struct sk_buff
*skb
);
1076 int (*gro_complete
)(struct sk_buff
*skb
);
1077 void *af_packet_priv
;
1078 struct list_head list
;
1081 #include <linux/interrupt.h>
1082 #include <linux/notifier.h>
1084 extern rwlock_t dev_base_lock
; /* Device list lock */
1087 #define for_each_netdev(net, d) \
1088 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1089 #define for_each_netdev_safe(net, d, n) \
1090 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1091 #define for_each_netdev_continue(net, d) \
1092 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1093 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1095 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1097 struct list_head
*lh
;
1101 lh
= dev
->dev_list
.next
;
1102 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1105 static inline struct net_device
*first_net_device(struct net
*net
)
1107 return list_empty(&net
->dev_base_head
) ? NULL
:
1108 net_device_entry(net
->dev_base_head
.next
);
1111 extern int netdev_boot_setup_check(struct net_device
*dev
);
1112 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1113 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1114 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1115 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1116 extern void dev_add_pack(struct packet_type
*pt
);
1117 extern void dev_remove_pack(struct packet_type
*pt
);
1118 extern void __dev_remove_pack(struct packet_type
*pt
);
1120 extern struct net_device
*dev_get_by_flags(struct net
*net
, unsigned short flags
,
1121 unsigned short mask
);
1122 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1123 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1124 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1125 extern int dev_open(struct net_device
*dev
);
1126 extern int dev_close(struct net_device
*dev
);
1127 extern void dev_disable_lro(struct net_device
*dev
);
1128 extern int dev_queue_xmit(struct sk_buff
*skb
);
1129 extern int register_netdevice(struct net_device
*dev
);
1130 extern void unregister_netdevice(struct net_device
*dev
);
1131 extern void free_netdev(struct net_device
*dev
);
1132 extern void synchronize_net(void);
1133 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1134 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1135 extern int init_dummy_netdev(struct net_device
*dev
);
1136 extern void netdev_resync_ops(struct net_device
*dev
);
1138 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1139 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1140 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1141 extern int dev_restart(struct net_device
*dev
);
1142 #ifdef CONFIG_NETPOLL_TRAP
1143 extern int netpoll_trap(void);
1145 extern void *skb_gro_header(struct sk_buff
*skb
, unsigned int hlen
);
1146 extern int skb_gro_receive(struct sk_buff
**head
,
1147 struct sk_buff
*skb
);
1149 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1151 return NAPI_GRO_CB(skb
)->data_offset
;
1154 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1156 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1159 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1161 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1164 static inline void skb_gro_reset_offset(struct sk_buff
*skb
)
1166 NAPI_GRO_CB(skb
)->data_offset
= 0;
1169 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1171 return skb_headlen(skb
) ? skb_mac_header(skb
) :
1172 page_address(skb_shinfo(skb
)->frags
[0].page
) +
1173 skb_shinfo(skb
)->frags
[0].page_offset
;
1176 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1178 return skb_headlen(skb
) ? skb_network_header(skb
) :
1179 page_address(skb_shinfo(skb
)->frags
[0].page
) +
1180 skb_shinfo(skb
)->frags
[0].page_offset
+ skb_network_offset(skb
);
1183 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1184 unsigned short type
,
1185 const void *daddr
, const void *saddr
,
1188 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1191 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1194 static inline int dev_parse_header(const struct sk_buff
*skb
,
1195 unsigned char *haddr
)
1197 const struct net_device
*dev
= skb
->dev
;
1199 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1201 return dev
->header_ops
->parse(skb
, haddr
);
1204 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1205 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1206 static inline int unregister_gifconf(unsigned int family
)
1208 return register_gifconf(family
, NULL
);
1212 * Incoming packets are placed on per-cpu queues so that
1213 * no locking is needed.
1217 struct Qdisc
*output_queue
;
1218 struct sk_buff_head input_pkt_queue
;
1219 struct list_head poll_list
;
1220 struct sk_buff
*completion_queue
;
1222 struct napi_struct backlog
;
1225 DECLARE_PER_CPU(struct softnet_data
,softnet_data
);
1227 #define HAVE_NETIF_QUEUE
1229 extern void __netif_schedule(struct Qdisc
*q
);
1231 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1233 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1234 __netif_schedule(txq
->qdisc
);
1237 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1241 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1242 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1245 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1247 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1251 * netif_start_queue - allow transmit
1252 * @dev: network device
1254 * Allow upper layers to call the device hard_start_xmit routine.
1256 static inline void netif_start_queue(struct net_device
*dev
)
1258 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1261 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1265 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1266 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1267 netif_tx_start_queue(txq
);
1271 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1273 #ifdef CONFIG_NETPOLL_TRAP
1274 if (netpoll_trap()) {
1275 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1279 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1280 __netif_schedule(dev_queue
->qdisc
);
1284 * netif_wake_queue - restart transmit
1285 * @dev: network device
1287 * Allow upper layers to call the device hard_start_xmit routine.
1288 * Used for flow control when transmit resources are available.
1290 static inline void netif_wake_queue(struct net_device
*dev
)
1292 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1295 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1299 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1300 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1301 netif_tx_wake_queue(txq
);
1305 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1307 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1311 * netif_stop_queue - stop transmitted packets
1312 * @dev: network device
1314 * Stop upper layers calling the device hard_start_xmit routine.
1315 * Used for flow control when transmit resources are unavailable.
1317 static inline void netif_stop_queue(struct net_device
*dev
)
1319 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1322 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1326 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1327 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1328 netif_tx_stop_queue(txq
);
1332 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1334 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1338 * netif_queue_stopped - test if transmit queue is flowblocked
1339 * @dev: network device
1341 * Test if transmit queue on device is currently unable to send.
1343 static inline int netif_queue_stopped(const struct net_device
*dev
)
1345 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1348 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1350 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1354 * netif_running - test if up
1355 * @dev: network device
1357 * Test if the device has been brought up.
1359 static inline int netif_running(const struct net_device
*dev
)
1361 return test_bit(__LINK_STATE_START
, &dev
->state
);
1365 * Routines to manage the subqueues on a device. We only need start
1366 * stop, and a check if it's stopped. All other device management is
1367 * done at the overall netdevice level.
1368 * Also test the device if we're multiqueue.
1372 * netif_start_subqueue - allow sending packets on subqueue
1373 * @dev: network device
1374 * @queue_index: sub queue index
1376 * Start individual transmit queue of a device with multiple transmit queues.
1378 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1380 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1381 clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
);
1385 * netif_stop_subqueue - stop sending packets on subqueue
1386 * @dev: network device
1387 * @queue_index: sub queue index
1389 * Stop individual transmit queue of a device with multiple transmit queues.
1391 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1393 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1394 #ifdef CONFIG_NETPOLL_TRAP
1398 set_bit(__QUEUE_STATE_XOFF
, &txq
->state
);
1402 * netif_subqueue_stopped - test status of subqueue
1403 * @dev: network device
1404 * @queue_index: sub queue index
1406 * Check individual transmit queue of a device with multiple transmit queues.
1408 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1411 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1412 return test_bit(__QUEUE_STATE_XOFF
, &txq
->state
);
1415 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1416 struct sk_buff
*skb
)
1418 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1422 * netif_wake_subqueue - allow sending packets on subqueue
1423 * @dev: network device
1424 * @queue_index: sub queue index
1426 * Resume individual transmit queue of a device with multiple transmit queues.
1428 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1430 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1431 #ifdef CONFIG_NETPOLL_TRAP
1435 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1436 __netif_schedule(txq
->qdisc
);
1440 * netif_is_multiqueue - test if device has multiple transmit queues
1441 * @dev: network device
1443 * Check if device has multiple transmit queues
1445 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1447 return (dev
->num_tx_queues
> 1);
1450 /* Use this variant when it is known for sure that it
1451 * is executing from hardware interrupt context or with hardware interrupts
1454 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1456 /* Use this variant in places where it could be invoked
1457 * from either hardware interrupt or other context, with hardware interrupts
1458 * either disabled or enabled.
1460 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1462 #define HAVE_NETIF_RX 1
1463 extern int netif_rx(struct sk_buff
*skb
);
1464 extern int netif_rx_ni(struct sk_buff
*skb
);
1465 #define HAVE_NETIF_RECEIVE_SKB 1
1466 extern int netif_receive_skb(struct sk_buff
*skb
);
1467 extern void napi_gro_flush(struct napi_struct
*napi
);
1468 extern int dev_gro_receive(struct napi_struct
*napi
,
1469 struct sk_buff
*skb
);
1470 extern int napi_skb_finish(int ret
, struct sk_buff
*skb
);
1471 extern int napi_gro_receive(struct napi_struct
*napi
,
1472 struct sk_buff
*skb
);
1473 extern void napi_reuse_skb(struct napi_struct
*napi
,
1474 struct sk_buff
*skb
);
1475 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1476 extern int napi_frags_finish(struct napi_struct
*napi
,
1477 struct sk_buff
*skb
, int ret
);
1478 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1479 extern int napi_gro_frags(struct napi_struct
*napi
);
1481 static inline void napi_free_frags(struct napi_struct
*napi
)
1483 kfree_skb(napi
->skb
);
1487 extern void netif_nit_deliver(struct sk_buff
*skb
);
1488 extern int dev_valid_name(const char *name
);
1489 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1490 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1491 extern unsigned dev_get_flags(const struct net_device
*);
1492 extern int dev_change_flags(struct net_device
*, unsigned);
1493 extern int dev_change_name(struct net_device
*, const char *);
1494 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1495 extern int dev_change_net_namespace(struct net_device
*,
1496 struct net
*, const char *);
1497 extern int dev_set_mtu(struct net_device
*, int);
1498 extern int dev_set_mac_address(struct net_device
*,
1500 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1501 struct net_device
*dev
,
1502 struct netdev_queue
*txq
);
1504 extern int netdev_budget
;
1506 /* Called by rtnetlink.c:rtnl_unlock() */
1507 extern void netdev_run_todo(void);
1510 * dev_put - release reference to device
1511 * @dev: network device
1513 * Release reference to device to allow it to be freed.
1515 static inline void dev_put(struct net_device
*dev
)
1517 atomic_dec(&dev
->refcnt
);
1521 * dev_hold - get reference to device
1522 * @dev: network device
1524 * Hold reference to device to keep it from being freed.
1526 static inline void dev_hold(struct net_device
*dev
)
1528 atomic_inc(&dev
->refcnt
);
1531 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1532 * and _off may be called from IRQ context, but it is caller
1533 * who is responsible for serialization of these calls.
1535 * The name carrier is inappropriate, these functions should really be
1536 * called netif_lowerlayer_*() because they represent the state of any
1537 * kind of lower layer not just hardware media.
1540 extern void linkwatch_fire_event(struct net_device
*dev
);
1543 * netif_carrier_ok - test if carrier present
1544 * @dev: network device
1546 * Check if carrier is present on device
1548 static inline int netif_carrier_ok(const struct net_device
*dev
)
1550 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1553 extern unsigned long dev_trans_start(struct net_device
*dev
);
1555 extern void __netdev_watchdog_up(struct net_device
*dev
);
1557 extern void netif_carrier_on(struct net_device
*dev
);
1559 extern void netif_carrier_off(struct net_device
*dev
);
1562 * netif_dormant_on - mark device as dormant.
1563 * @dev: network device
1565 * Mark device as dormant (as per RFC2863).
1567 * The dormant state indicates that the relevant interface is not
1568 * actually in a condition to pass packets (i.e., it is not 'up') but is
1569 * in a "pending" state, waiting for some external event. For "on-
1570 * demand" interfaces, this new state identifies the situation where the
1571 * interface is waiting for events to place it in the up state.
1574 static inline void netif_dormant_on(struct net_device
*dev
)
1576 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1577 linkwatch_fire_event(dev
);
1581 * netif_dormant_off - set device as not dormant.
1582 * @dev: network device
1584 * Device is not in dormant state.
1586 static inline void netif_dormant_off(struct net_device
*dev
)
1588 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1589 linkwatch_fire_event(dev
);
1593 * netif_dormant - test if carrier present
1594 * @dev: network device
1596 * Check if carrier is present on device
1598 static inline int netif_dormant(const struct net_device
*dev
)
1600 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1605 * netif_oper_up - test if device is operational
1606 * @dev: network device
1608 * Check if carrier is operational
1610 static inline int netif_oper_up(const struct net_device
*dev
) {
1611 return (dev
->operstate
== IF_OPER_UP
||
1612 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1616 * netif_device_present - is device available or removed
1617 * @dev: network device
1619 * Check if device has not been removed from system.
1621 static inline int netif_device_present(struct net_device
*dev
)
1623 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1626 extern void netif_device_detach(struct net_device
*dev
);
1628 extern void netif_device_attach(struct net_device
*dev
);
1631 * Network interface message level settings
1633 #define HAVE_NETIF_MSG 1
1636 NETIF_MSG_DRV
= 0x0001,
1637 NETIF_MSG_PROBE
= 0x0002,
1638 NETIF_MSG_LINK
= 0x0004,
1639 NETIF_MSG_TIMER
= 0x0008,
1640 NETIF_MSG_IFDOWN
= 0x0010,
1641 NETIF_MSG_IFUP
= 0x0020,
1642 NETIF_MSG_RX_ERR
= 0x0040,
1643 NETIF_MSG_TX_ERR
= 0x0080,
1644 NETIF_MSG_TX_QUEUED
= 0x0100,
1645 NETIF_MSG_INTR
= 0x0200,
1646 NETIF_MSG_TX_DONE
= 0x0400,
1647 NETIF_MSG_RX_STATUS
= 0x0800,
1648 NETIF_MSG_PKTDATA
= 0x1000,
1649 NETIF_MSG_HW
= 0x2000,
1650 NETIF_MSG_WOL
= 0x4000,
1653 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1654 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1655 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1656 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1657 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1658 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1659 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1660 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1661 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1662 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1663 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1664 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1665 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1666 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1667 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1669 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1672 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1673 return default_msg_enable_bits
;
1674 if (debug_value
== 0) /* no output */
1676 /* set low N bits */
1677 return (1 << debug_value
) - 1;
1680 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1682 spin_lock(&txq
->_xmit_lock
);
1683 txq
->xmit_lock_owner
= cpu
;
1686 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1688 spin_lock_bh(&txq
->_xmit_lock
);
1689 txq
->xmit_lock_owner
= smp_processor_id();
1692 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1694 int ok
= spin_trylock(&txq
->_xmit_lock
);
1696 txq
->xmit_lock_owner
= smp_processor_id();
1700 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1702 txq
->xmit_lock_owner
= -1;
1703 spin_unlock(&txq
->_xmit_lock
);
1706 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
1708 txq
->xmit_lock_owner
= -1;
1709 spin_unlock_bh(&txq
->_xmit_lock
);
1713 * netif_tx_lock - grab network device transmit lock
1714 * @dev: network device
1716 * Get network device transmit lock
1718 static inline void netif_tx_lock(struct net_device
*dev
)
1723 spin_lock(&dev
->tx_global_lock
);
1724 cpu
= smp_processor_id();
1725 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1726 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1728 /* We are the only thread of execution doing a
1729 * freeze, but we have to grab the _xmit_lock in
1730 * order to synchronize with threads which are in
1731 * the ->hard_start_xmit() handler and already
1732 * checked the frozen bit.
1734 __netif_tx_lock(txq
, cpu
);
1735 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1736 __netif_tx_unlock(txq
);
1740 static inline void netif_tx_lock_bh(struct net_device
*dev
)
1746 static inline void netif_tx_unlock(struct net_device
*dev
)
1750 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1751 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1753 /* No need to grab the _xmit_lock here. If the
1754 * queue is not stopped for another reason, we
1757 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1758 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1759 __netif_schedule(txq
->qdisc
);
1761 spin_unlock(&dev
->tx_global_lock
);
1764 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
1766 netif_tx_unlock(dev
);
1770 #define HARD_TX_LOCK(dev, txq, cpu) { \
1771 if ((dev->features & NETIF_F_LLTX) == 0) { \
1772 __netif_tx_lock(txq, cpu); \
1776 #define HARD_TX_UNLOCK(dev, txq) { \
1777 if ((dev->features & NETIF_F_LLTX) == 0) { \
1778 __netif_tx_unlock(txq); \
1782 static inline void netif_tx_disable(struct net_device
*dev
)
1788 cpu
= smp_processor_id();
1789 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1790 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1792 __netif_tx_lock(txq
, cpu
);
1793 netif_tx_stop_queue(txq
);
1794 __netif_tx_unlock(txq
);
1799 static inline void netif_addr_lock(struct net_device
*dev
)
1801 spin_lock(&dev
->addr_list_lock
);
1804 static inline void netif_addr_lock_bh(struct net_device
*dev
)
1806 spin_lock_bh(&dev
->addr_list_lock
);
1809 static inline void netif_addr_unlock(struct net_device
*dev
)
1811 spin_unlock(&dev
->addr_list_lock
);
1814 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
1816 spin_unlock_bh(&dev
->addr_list_lock
);
1820 * dev_addr_list walker. Should be used only for read access. Call with
1821 * rcu_read_lock held.
1823 #define for_each_dev_addr(dev, ha) \
1824 list_for_each_entry_rcu(ha, &dev->dev_addr_list, list)
1826 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1828 extern void ether_setup(struct net_device
*dev
);
1830 /* Support for loadable net-drivers */
1831 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
1832 void (*setup
)(struct net_device
*),
1833 unsigned int queue_count
);
1834 #define alloc_netdev(sizeof_priv, name, setup) \
1835 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1836 extern int register_netdev(struct net_device
*dev
);
1837 extern void unregister_netdev(struct net_device
*dev
);
1839 /* Functions used for device addresses handling */
1840 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
1841 unsigned char addr_type
);
1842 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
1843 unsigned char addr_type
);
1844 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
1845 struct net_device
*from_dev
,
1846 unsigned char addr_type
);
1847 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
1848 struct net_device
*from_dev
,
1849 unsigned char addr_type
);
1851 /* Functions used for secondary unicast and multicast support */
1852 extern void dev_set_rx_mode(struct net_device
*dev
);
1853 extern void __dev_set_rx_mode(struct net_device
*dev
);
1854 extern int dev_unicast_delete(struct net_device
*dev
, void *addr
, int alen
);
1855 extern int dev_unicast_add(struct net_device
*dev
, void *addr
, int alen
);
1856 extern int dev_unicast_sync(struct net_device
*to
, struct net_device
*from
);
1857 extern void dev_unicast_unsync(struct net_device
*to
, struct net_device
*from
);
1858 extern int dev_mc_delete(struct net_device
*dev
, void *addr
, int alen
, int all
);
1859 extern int dev_mc_add(struct net_device
*dev
, void *addr
, int alen
, int newonly
);
1860 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
1861 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
1862 extern int __dev_addr_delete(struct dev_addr_list
**list
, int *count
, void *addr
, int alen
, int all
);
1863 extern int __dev_addr_add(struct dev_addr_list
**list
, int *count
, void *addr
, int alen
, int newonly
);
1864 extern int __dev_addr_sync(struct dev_addr_list
**to
, int *to_count
, struct dev_addr_list
**from
, int *from_count
);
1865 extern void __dev_addr_unsync(struct dev_addr_list
**to
, int *to_count
, struct dev_addr_list
**from
, int *from_count
);
1866 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
1867 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
1868 extern void netdev_state_change(struct net_device
*dev
);
1869 extern void netdev_bonding_change(struct net_device
*dev
);
1870 extern void netdev_features_change(struct net_device
*dev
);
1871 /* Load a device via the kmod */
1872 extern void dev_load(struct net
*net
, const char *name
);
1873 extern void dev_mcast_init(void);
1874 extern const struct net_device_stats
*dev_get_stats(struct net_device
*dev
);
1876 extern int netdev_max_backlog
;
1877 extern int weight_p
;
1878 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
1879 extern int skb_checksum_help(struct sk_buff
*skb
);
1880 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
1882 extern void netdev_rx_csum_fault(struct net_device
*dev
);
1884 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
1888 /* rx skb timestamps */
1889 extern void net_enable_timestamp(void);
1890 extern void net_disable_timestamp(void);
1892 #ifdef CONFIG_PROC_FS
1893 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
1894 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
1895 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
1898 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
1899 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
1901 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
1903 extern void linkwatch_run_queue(void);
1905 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
1906 unsigned long mask
);
1907 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
1909 static inline int net_gso_ok(int features
, int gso_type
)
1911 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
1912 return (features
& feature
) == feature
;
1915 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
1917 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
);
1920 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
1922 return skb_is_gso(skb
) &&
1923 (!skb_gso_ok(skb
, dev
->features
) ||
1924 (skb_shinfo(skb
)->frag_list
&&
1925 !(dev
->features
& NETIF_F_FRAGLIST
)) ||
1926 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
1929 static inline void netif_set_gso_max_size(struct net_device
*dev
,
1932 dev
->gso_max_size
= size
;
1935 /* On bonding slaves other than the currently active slave, suppress
1936 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1937 * ARP on active-backup slaves with arp_validate enabled.
1939 static inline int skb_bond_should_drop(struct sk_buff
*skb
)
1941 struct net_device
*dev
= skb
->dev
;
1942 struct net_device
*master
= dev
->master
;
1945 if (master
->priv_flags
& IFF_MASTER_ARPMON
)
1946 dev
->last_rx
= jiffies
;
1948 if (dev
->priv_flags
& IFF_SLAVE_INACTIVE
) {
1949 if ((dev
->priv_flags
& IFF_SLAVE_NEEDARP
) &&
1950 skb
->protocol
== __cpu_to_be16(ETH_P_ARP
))
1953 if (master
->priv_flags
& IFF_MASTER_ALB
) {
1954 if (skb
->pkt_type
!= PACKET_BROADCAST
&&
1955 skb
->pkt_type
!= PACKET_MULTICAST
)
1958 if (master
->priv_flags
& IFF_MASTER_8023AD
&&
1959 skb
->protocol
== __cpu_to_be16(ETH_P_SLOW
))
1968 extern struct pernet_operations __net_initdata loopback_net_ops
;
1970 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
1971 struct ethtool_cmd
*cmd
)
1973 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
1975 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
1978 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
1980 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
1982 return dev
->ethtool_ops
->get_rx_csum(dev
);
1985 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
1987 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
1989 return dev
->ethtool_ops
->get_flags(dev
);
1991 #endif /* __KERNEL__ */
1993 #endif /* _LINUX_DEV_H */