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 */
76 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
77 * indicates that the device will soon be dropping packets, or already drops
78 * some packets of the same priority; prompting us to send less aggressively. */
79 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
80 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
82 /* Driver transmit return codes */
84 NETDEV_TX_OK
= 0, /* driver took care of packet */
85 NETDEV_TX_BUSY
, /* driver tx path was busy*/
86 NETDEV_TX_LOCKED
= -1, /* driver tx lock was already taken */
88 typedef enum netdev_tx netdev_tx_t
;
92 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
96 * Compute the worst case header length according to the protocols
100 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
101 # if defined(CONFIG_MAC80211_MESH)
102 # define LL_MAX_HEADER 128
104 # define LL_MAX_HEADER 96
106 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
107 # define LL_MAX_HEADER 48
109 # define LL_MAX_HEADER 32
112 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
113 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
114 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
115 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
116 #define MAX_HEADER LL_MAX_HEADER
118 #define MAX_HEADER (LL_MAX_HEADER + 48)
121 #endif /* __KERNEL__ */
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
128 struct net_device_stats
130 unsigned long rx_packets
; /* total packets received */
131 unsigned long tx_packets
; /* total packets transmitted */
132 unsigned long rx_bytes
; /* total bytes received */
133 unsigned long tx_bytes
; /* total bytes transmitted */
134 unsigned long rx_errors
; /* bad packets received */
135 unsigned long tx_errors
; /* packet transmit problems */
136 unsigned long rx_dropped
; /* no space in linux buffers */
137 unsigned long tx_dropped
; /* no space available in linux */
138 unsigned long multicast
; /* multicast packets received */
139 unsigned long collisions
;
141 /* detailed rx_errors: */
142 unsigned long rx_length_errors
;
143 unsigned long rx_over_errors
; /* receiver ring buff overflow */
144 unsigned long rx_crc_errors
; /* recved pkt with crc error */
145 unsigned long rx_frame_errors
; /* recv'd frame alignment error */
146 unsigned long rx_fifo_errors
; /* recv'r fifo overrun */
147 unsigned long rx_missed_errors
; /* receiver missed packet */
149 /* detailed tx_errors */
150 unsigned long tx_aborted_errors
;
151 unsigned long tx_carrier_errors
;
152 unsigned long tx_fifo_errors
;
153 unsigned long tx_heartbeat_errors
;
154 unsigned long tx_window_errors
;
157 unsigned long rx_compressed
;
158 unsigned long tx_compressed
;
162 /* Media selection options. */
175 #include <linux/cache.h>
176 #include <linux/skbuff.h>
182 struct netif_rx_stats
186 unsigned time_squeeze
;
187 unsigned cpu_collision
;
190 DECLARE_PER_CPU(struct netif_rx_stats
, netdev_rx_stat
);
194 struct dev_addr_list
*next
;
195 u8 da_addr
[MAX_ADDR_LEN
];
203 * We tag multicasts with these structures.
206 #define dev_mc_list dev_addr_list
207 #define dmi_addr da_addr
208 #define dmi_addrlen da_addrlen
209 #define dmi_users da_users
210 #define dmi_gusers da_gusers
212 struct netdev_hw_addr
{
213 struct list_head list
;
214 unsigned char addr
[MAX_ADDR_LEN
];
216 #define NETDEV_HW_ADDR_T_LAN 1
217 #define NETDEV_HW_ADDR_T_SAN 2
218 #define NETDEV_HW_ADDR_T_SLAVE 3
219 #define NETDEV_HW_ADDR_T_UNICAST 4
222 struct rcu_head rcu_head
;
225 struct netdev_hw_addr_list
{
226 struct list_head list
;
232 struct hh_cache
*hh_next
; /* Next entry */
233 atomic_t hh_refcnt
; /* number of users */
235 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
237 * They are mostly read, but hh_refcnt may be changed quite frequently,
238 * incurring cache line ping pongs.
240 __be16 hh_type ____cacheline_aligned_in_smp
;
241 /* protocol identifier, f.e ETH_P_IP
242 * NOTE: For VLANs, this will be the
243 * encapuslated type. --BLG
245 u16 hh_len
; /* length of header */
246 int (*hh_output
)(struct sk_buff
*skb
);
249 /* cached hardware header; allow for machine alignment needs. */
250 #define HH_DATA_MOD 16
251 #define HH_DATA_OFF(__len) \
252 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
253 #define HH_DATA_ALIGN(__len) \
254 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
255 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
258 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
260 * dev->hard_header_len ? (dev->hard_header_len +
261 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
263 * We could use other alignment values, but we must maintain the
264 * relationship HH alignment <= LL alignment.
266 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
269 #define LL_RESERVED_SPACE(dev) \
270 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
271 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
272 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
273 #define LL_ALLOCATED_SPACE(dev) \
274 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
277 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
278 unsigned short type
, const void *daddr
,
279 const void *saddr
, unsigned len
);
280 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
281 int (*rebuild
)(struct sk_buff
*skb
);
282 #define HAVE_HEADER_CACHE
283 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
284 void (*cache_update
)(struct hh_cache
*hh
,
285 const struct net_device
*dev
,
286 const unsigned char *haddr
);
289 /* These flag bits are private to the generic network queueing
290 * layer, they may not be explicitly referenced by any other
297 __LINK_STATE_PRESENT
,
298 __LINK_STATE_NOCARRIER
,
299 __LINK_STATE_LINKWATCH_PENDING
,
300 __LINK_STATE_DORMANT
,
305 * This structure holds at boot time configured netdevice settings. They
306 * are then used in the device probing.
308 struct netdev_boot_setup
{
312 #define NETDEV_BOOT_SETUP_MAX 8
314 extern int __init
netdev_boot_setup(char *str
);
317 * Structure for NAPI scheduling similar to tasklet but with weighting
320 /* The poll_list must only be managed by the entity which
321 * changes the state of the NAPI_STATE_SCHED bit. This means
322 * whoever atomically sets that bit can add this napi_struct
323 * to the per-cpu poll_list, and whoever clears that bit
324 * can remove from the list right before clearing the bit.
326 struct list_head poll_list
;
330 int (*poll
)(struct napi_struct
*, int);
331 #ifdef CONFIG_NETPOLL
332 spinlock_t poll_lock
;
336 unsigned int gro_count
;
338 struct net_device
*dev
;
339 struct list_head dev_list
;
340 struct sk_buff
*gro_list
;
346 NAPI_STATE_SCHED
, /* Poll is scheduled */
347 NAPI_STATE_DISABLE
, /* Disable pending */
348 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
358 typedef enum gro_result gro_result_t
;
360 extern void __napi_schedule(struct napi_struct
*n
);
362 static inline int napi_disable_pending(struct napi_struct
*n
)
364 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
368 * napi_schedule_prep - check if napi can be scheduled
371 * Test if NAPI routine is already running, and if not mark
372 * it as running. This is used as a condition variable
373 * insure only one NAPI poll instance runs. We also make
374 * sure there is no pending NAPI disable.
376 static inline int napi_schedule_prep(struct napi_struct
*n
)
378 return !napi_disable_pending(n
) &&
379 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
383 * napi_schedule - schedule NAPI poll
386 * Schedule NAPI poll routine to be called if it is not already
389 static inline void napi_schedule(struct napi_struct
*n
)
391 if (napi_schedule_prep(n
))
395 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
396 static inline int napi_reschedule(struct napi_struct
*napi
)
398 if (napi_schedule_prep(napi
)) {
399 __napi_schedule(napi
);
406 * napi_complete - NAPI processing complete
409 * Mark NAPI processing as complete.
411 extern void __napi_complete(struct napi_struct
*n
);
412 extern void napi_complete(struct napi_struct
*n
);
415 * napi_disable - prevent NAPI from scheduling
418 * Stop NAPI from being scheduled on this context.
419 * Waits till any outstanding processing completes.
421 static inline void napi_disable(struct napi_struct
*n
)
423 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
424 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
426 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
430 * napi_enable - enable NAPI scheduling
433 * Resume NAPI from being scheduled on this context.
434 * Must be paired with napi_disable.
436 static inline void napi_enable(struct napi_struct
*n
)
438 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
439 smp_mb__before_clear_bit();
440 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
445 * napi_synchronize - wait until NAPI is not running
448 * Wait until NAPI is done being scheduled on this context.
449 * Waits till any outstanding processing completes but
450 * does not disable future activations.
452 static inline void napi_synchronize(const struct napi_struct
*n
)
454 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
458 # define napi_synchronize(n) barrier()
461 enum netdev_queue_state_t
464 __QUEUE_STATE_FROZEN
,
467 struct netdev_queue
{
471 struct net_device
*dev
;
474 struct Qdisc
*qdisc_sleeping
;
478 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
481 * please use this field instead of dev->trans_start
483 unsigned long trans_start
;
484 unsigned long tx_bytes
;
485 unsigned long tx_packets
;
486 unsigned long tx_dropped
;
487 } ____cacheline_aligned_in_smp
;
491 * This structure defines the management hooks for network devices.
492 * The following hooks can be defined; unless noted otherwise, they are
493 * optional and can be filled with a null pointer.
495 * int (*ndo_init)(struct net_device *dev);
496 * This function is called once when network device is registered.
497 * The network device can use this to any late stage initializaton
498 * or semantic validattion. It can fail with an error code which will
499 * be propogated back to register_netdev
501 * void (*ndo_uninit)(struct net_device *dev);
502 * This function is called when device is unregistered or when registration
503 * fails. It is not called if init fails.
505 * int (*ndo_open)(struct net_device *dev);
506 * This function is called when network device transistions to the up
509 * int (*ndo_stop)(struct net_device *dev);
510 * This function is called when network device transistions to the down
513 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
514 * struct net_device *dev);
515 * Called when a packet needs to be transmitted.
516 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
517 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
518 * Required can not be NULL.
520 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
521 * Called to decide which queue to when device supports multiple
524 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
525 * This function is called to allow device receiver to make
526 * changes to configuration when multicast or promiscious is enabled.
528 * void (*ndo_set_rx_mode)(struct net_device *dev);
529 * This function is called device changes address list filtering.
531 * void (*ndo_set_multicast_list)(struct net_device *dev);
532 * This function is called when the multicast address list changes.
534 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
535 * This function is called when the Media Access Control address
536 * needs to be changed. If this interface is not defined, the
537 * mac address can not be changed.
539 * int (*ndo_validate_addr)(struct net_device *dev);
540 * Test if Media Access Control address is valid for the device.
542 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
543 * Called when a user request an ioctl which can't be handled by
544 * the generic interface code. If not defined ioctl's return
545 * not supported error code.
547 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
548 * Used to set network devices bus interface parameters. This interface
549 * is retained for legacy reason, new devices should use the bus
550 * interface (PCI) for low level management.
552 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
553 * Called when a user wants to change the Maximum Transfer Unit
554 * of a device. If not defined, any request to change MTU will
555 * will return an error.
557 * void (*ndo_tx_timeout)(struct net_device *dev);
558 * Callback uses when the transmitter has not made any progress
559 * for dev->watchdog ticks.
561 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
562 * Called when a user wants to get the network device usage
563 * statistics. If not defined, the counters in dev->stats will
566 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
567 * If device support VLAN receive accleration
568 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
569 * when vlan groups for the device changes. Note: grp is NULL
570 * if no vlan's groups are being used.
572 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
573 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
574 * this function is called when a VLAN id is registered.
576 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
577 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
578 * this function is called when a VLAN id is unregistered.
580 * void (*ndo_poll_controller)(struct net_device *dev);
582 #define HAVE_NET_DEVICE_OPS
583 struct net_device_ops
{
584 int (*ndo_init
)(struct net_device
*dev
);
585 void (*ndo_uninit
)(struct net_device
*dev
);
586 int (*ndo_open
)(struct net_device
*dev
);
587 int (*ndo_stop
)(struct net_device
*dev
);
588 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
589 struct net_device
*dev
);
590 u16 (*ndo_select_queue
)(struct net_device
*dev
,
591 struct sk_buff
*skb
);
592 #define HAVE_CHANGE_RX_FLAGS
593 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
595 #define HAVE_SET_RX_MODE
596 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
597 #define HAVE_MULTICAST
598 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
599 #define HAVE_SET_MAC_ADDR
600 int (*ndo_set_mac_address
)(struct net_device
*dev
,
602 #define HAVE_VALIDATE_ADDR
603 int (*ndo_validate_addr
)(struct net_device
*dev
);
604 #define HAVE_PRIVATE_IOCTL
605 int (*ndo_do_ioctl
)(struct net_device
*dev
,
606 struct ifreq
*ifr
, int cmd
);
607 #define HAVE_SET_CONFIG
608 int (*ndo_set_config
)(struct net_device
*dev
,
610 #define HAVE_CHANGE_MTU
611 int (*ndo_change_mtu
)(struct net_device
*dev
,
613 int (*ndo_neigh_setup
)(struct net_device
*dev
,
614 struct neigh_parms
*);
615 #define HAVE_TX_TIMEOUT
616 void (*ndo_tx_timeout
) (struct net_device
*dev
);
618 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
620 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
621 struct vlan_group
*grp
);
622 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
624 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
626 #ifdef CONFIG_NET_POLL_CONTROLLER
627 #define HAVE_NETDEV_POLL
628 void (*ndo_poll_controller
)(struct net_device
*dev
);
630 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
631 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
632 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
633 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
635 struct scatterlist
*sgl
,
637 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
639 #define NETDEV_FCOE_WWNN 0
640 #define NETDEV_FCOE_WWPN 1
641 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
647 * The DEVICE structure.
648 * Actually, this whole structure is a big mistake. It mixes I/O
649 * data with strictly "high-level" data, and it has to know about
650 * almost every data structure used in the INET module.
652 * FIXME: cleanup struct net_device such that network protocol info
660 * This is the first field of the "visible" part of this structure
661 * (i.e. as seen by users in the "Space.c" file). It is the name
665 /* device name hash chain */
666 struct hlist_node name_hlist
;
671 * I/O specific fields
672 * FIXME: Merge these and struct ifmap into one
674 unsigned long mem_end
; /* shared mem end */
675 unsigned long mem_start
; /* shared mem start */
676 unsigned long base_addr
; /* device I/O address */
677 unsigned int irq
; /* device IRQ number */
680 * Some hardware also needs these fields, but they are not
681 * part of the usual set specified in Space.c.
684 unsigned char if_port
; /* Selectable AUI, TP,..*/
685 unsigned char dma
; /* DMA channel */
689 struct list_head dev_list
;
690 struct list_head napi_list
;
691 struct list_head unreg_list
;
693 /* Net device features */
694 unsigned long features
;
695 #define NETIF_F_SG 1 /* Scatter/gather IO. */
696 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
697 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
698 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
699 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
700 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
701 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
702 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
703 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
704 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
705 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
706 #define NETIF_F_GSO 2048 /* Enable software GSO. */
707 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
708 /* do not use LLTX in new drivers */
709 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
710 #define NETIF_F_GRO 16384 /* Generic receive offload */
711 #define NETIF_F_LRO 32768 /* large receive offload */
713 /* the GSO_MASK reserves bits 16 through 23 */
714 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
715 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
716 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
718 /* Segmentation offload features */
719 #define NETIF_F_GSO_SHIFT 16
720 #define NETIF_F_GSO_MASK 0x00ff0000
721 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
722 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
723 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
724 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
725 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
726 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
728 /* List of features with software fallbacks. */
729 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
732 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
733 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
734 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
735 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
738 * If one device supports one of these features, then enable them
739 * for all in netdev_increment_features.
741 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
742 NETIF_F_SG | NETIF_F_HIGHDMA | \
745 /* Interface index. Unique device identifier */
749 struct net_device_stats stats
;
751 #ifdef CONFIG_WIRELESS_EXT
752 /* List of functions to handle Wireless Extensions (instead of ioctl).
753 * See <net/iw_handler.h> for details. Jean II */
754 const struct iw_handler_def
* wireless_handlers
;
755 /* Instance data managed by the core of Wireless Extensions. */
756 struct iw_public_data
* wireless_data
;
758 /* Management operations */
759 const struct net_device_ops
*netdev_ops
;
760 const struct ethtool_ops
*ethtool_ops
;
762 /* Hardware header description */
763 const struct header_ops
*header_ops
;
765 unsigned int flags
; /* interface flags (a la BSD) */
766 unsigned short gflags
;
767 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
768 unsigned short padded
; /* How much padding added by alloc_netdev() */
770 unsigned char operstate
; /* RFC2863 operstate */
771 unsigned char link_mode
; /* mapping policy to operstate */
773 unsigned mtu
; /* interface MTU value */
774 unsigned short type
; /* interface hardware type */
775 unsigned short hard_header_len
; /* hardware hdr length */
777 /* extra head- and tailroom the hardware may need, but not in all cases
778 * can this be guaranteed, especially tailroom. Some cases also use
779 * LL_MAX_HEADER instead to allocate the skb.
781 unsigned short needed_headroom
;
782 unsigned short needed_tailroom
;
784 struct net_device
*master
; /* Pointer to master device of a group,
785 * which this device is member of.
788 /* Interface address info. */
789 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
790 unsigned char addr_len
; /* hardware address length */
791 unsigned short dev_id
; /* for shared network cards */
793 struct netdev_hw_addr_list uc
; /* Secondary unicast
796 spinlock_t addr_list_lock
;
797 struct dev_addr_list
*mc_list
; /* Multicast mac addresses */
798 int mc_count
; /* Number of installed mcasts */
799 unsigned int promiscuity
;
800 unsigned int allmulti
;
803 /* Protocol specific pointers */
805 #ifdef CONFIG_NET_DSA
806 void *dsa_ptr
; /* dsa specific data */
808 void *atalk_ptr
; /* AppleTalk link */
809 void *ip_ptr
; /* IPv4 specific data */
810 void *dn_ptr
; /* DECnet specific data */
811 void *ip6_ptr
; /* IPv6 specific data */
812 void *ec_ptr
; /* Econet specific data */
813 void *ax25_ptr
; /* AX.25 specific data */
814 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
815 assign before registering */
818 * Cache line mostly used on receive path (including eth_type_trans())
820 unsigned long last_rx
; /* Time of last Rx */
821 /* Interface address info used in eth_type_trans() */
822 unsigned char *dev_addr
; /* hw address, (before bcast
823 because most packets are
826 struct netdev_hw_addr_list dev_addrs
; /* list of device
829 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
831 struct netdev_queue rx_queue
;
833 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
835 /* Number of TX queues allocated at alloc_netdev_mq() time */
836 unsigned int num_tx_queues
;
838 /* Number of TX queues currently active in device */
839 unsigned int real_num_tx_queues
;
841 /* root qdisc from userspace point of view */
844 unsigned long tx_queue_len
; /* Max frames per queue allowed */
845 spinlock_t tx_global_lock
;
847 * One part is mostly used on xmit path (device)
849 /* These may be needed for future network-power-down code. */
852 * trans_start here is expensive for high speed devices on SMP,
853 * please use netdev_queue->trans_start instead.
855 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
857 int watchdog_timeo
; /* used by dev_watchdog() */
858 struct timer_list watchdog_timer
;
860 /* Number of references to this device */
861 atomic_t refcnt ____cacheline_aligned_in_smp
;
863 /* delayed register/unregister */
864 struct list_head todo_list
;
865 /* device index hash chain */
866 struct hlist_node index_hlist
;
868 struct net_device
*link_watch_next
;
870 /* register/unregister state machine */
871 enum { NETREG_UNINITIALIZED
=0,
872 NETREG_REGISTERED
, /* completed register_netdevice */
873 NETREG_UNREGISTERING
, /* called unregister_netdevice */
874 NETREG_UNREGISTERED
, /* completed unregister todo */
875 NETREG_RELEASED
, /* called free_netdev */
876 NETREG_DUMMY
, /* dummy device for NAPI poll */
879 /* Called from unregister, can be used to call free_netdev */
880 void (*destructor
)(struct net_device
*dev
);
882 #ifdef CONFIG_NETPOLL
883 struct netpoll_info
*npinfo
;
887 /* Network namespace this network device is inside */
891 /* mid-layer private */
895 struct net_bridge_port
*br_port
;
897 struct macvlan_port
*macvlan_port
;
899 struct garp_port
*garp_port
;
901 /* class/net/name entry */
903 /* space for optional device, statistics, and wireless sysfs groups */
904 const struct attribute_group
*sysfs_groups
[4];
906 /* rtnetlink link ops */
907 const struct rtnl_link_ops
*rtnl_link_ops
;
909 /* VLAN feature mask */
910 unsigned long vlan_features
;
912 /* for setting kernel sock attribute on TCP connection setup */
913 #define GSO_MAX_SIZE 65536
914 unsigned int gso_max_size
;
917 /* Data Center Bridging netlink ops */
918 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
921 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
922 /* max exchange id for FCoE LRO by ddp */
923 unsigned int fcoe_ddp_xid
;
926 #define to_net_dev(d) container_of(d, struct net_device, dev)
928 #define NETDEV_ALIGN 32
931 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
934 return &dev
->_tx
[index
];
937 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
938 void (*f
)(struct net_device
*,
939 struct netdev_queue
*,
945 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
946 f(dev
, &dev
->_tx
[i
], arg
);
950 * Net namespace inlines
953 struct net
*dev_net(const struct net_device
*dev
)
963 void dev_net_set(struct net_device
*dev
, struct net
*net
)
966 release_net(dev
->nd_net
);
967 dev
->nd_net
= hold_net(net
);
971 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
973 #ifdef CONFIG_NET_DSA_TAG_DSA
974 if (dev
->dsa_ptr
!= NULL
)
975 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
981 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
983 #ifdef CONFIG_NET_DSA_TAG_TRAILER
984 if (dev
->dsa_ptr
!= NULL
)
985 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
992 * netdev_priv - access network device private data
993 * @dev: network device
995 * Get network device private data
997 static inline void *netdev_priv(const struct net_device
*dev
)
999 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1002 /* Set the sysfs physical device reference for the network logical device
1003 * if set prior to registration will cause a symlink during initialization.
1005 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1007 /* Set the sysfs device type for the network logical device to allow
1008 * fin grained indentification of different network device types. For
1009 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1011 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1014 * netif_napi_add - initialize a napi context
1015 * @dev: network device
1016 * @napi: napi context
1017 * @poll: polling function
1018 * @weight: default weight
1020 * netif_napi_add() must be used to initialize a napi context prior to calling
1021 * *any* of the other napi related functions.
1023 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1024 int (*poll
)(struct napi_struct
*, int), int weight
);
1027 * netif_napi_del - remove a napi context
1028 * @napi: napi context
1030 * netif_napi_del() removes a napi context from the network device napi list
1032 void netif_napi_del(struct napi_struct
*napi
);
1034 struct napi_gro_cb
{
1035 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1038 /* Length of frag0. */
1039 unsigned int frag0_len
;
1041 /* This indicates where we are processing relative to skb->data. */
1044 /* This is non-zero if the packet may be of the same flow. */
1047 /* This is non-zero if the packet cannot be merged with the new skb. */
1050 /* Number of segments aggregated. */
1057 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1059 struct packet_type
{
1060 __be16 type
; /* This is really htons(ether_type). */
1061 struct net_device
*dev
; /* NULL is wildcarded here */
1062 int (*func
) (struct sk_buff
*,
1063 struct net_device
*,
1064 struct packet_type
*,
1065 struct net_device
*);
1066 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1068 int (*gso_send_check
)(struct sk_buff
*skb
);
1069 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1070 struct sk_buff
*skb
);
1071 int (*gro_complete
)(struct sk_buff
*skb
);
1072 void *af_packet_priv
;
1073 struct list_head list
;
1076 #include <linux/interrupt.h>
1077 #include <linux/notifier.h>
1079 extern rwlock_t dev_base_lock
; /* Device list lock */
1082 #define for_each_netdev(net, d) \
1083 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1084 #define for_each_netdev_safe(net, d, n) \
1085 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1086 #define for_each_netdev_continue(net, d) \
1087 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1088 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1090 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1092 struct list_head
*lh
;
1096 lh
= dev
->dev_list
.next
;
1097 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1100 static inline struct net_device
*first_net_device(struct net
*net
)
1102 return list_empty(&net
->dev_base_head
) ? NULL
:
1103 net_device_entry(net
->dev_base_head
.next
);
1106 extern int netdev_boot_setup_check(struct net_device
*dev
);
1107 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1108 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1109 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1110 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1111 extern void dev_add_pack(struct packet_type
*pt
);
1112 extern void dev_remove_pack(struct packet_type
*pt
);
1113 extern void __dev_remove_pack(struct packet_type
*pt
);
1115 extern struct net_device
*dev_get_by_flags(struct net
*net
, unsigned short flags
,
1116 unsigned short mask
);
1117 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1118 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1119 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1120 extern int dev_open(struct net_device
*dev
);
1121 extern int dev_close(struct net_device
*dev
);
1122 extern void dev_disable_lro(struct net_device
*dev
);
1123 extern int dev_queue_xmit(struct sk_buff
*skb
);
1124 extern int register_netdevice(struct net_device
*dev
);
1125 extern void unregister_netdevice_queue(struct net_device
*dev
,
1126 struct list_head
*head
);
1127 extern void unregister_netdevice_many(struct list_head
*head
);
1128 static inline void unregister_netdevice(struct net_device
*dev
)
1130 unregister_netdevice_queue(dev
, NULL
);
1133 extern void free_netdev(struct net_device
*dev
);
1134 extern void synchronize_net(void);
1135 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1136 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1137 extern int init_dummy_netdev(struct net_device
*dev
);
1138 extern void netdev_resync_ops(struct net_device
*dev
);
1140 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1141 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1142 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1143 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1144 extern int dev_restart(struct net_device
*dev
);
1145 #ifdef CONFIG_NETPOLL_TRAP
1146 extern int netpoll_trap(void);
1148 extern int skb_gro_receive(struct sk_buff
**head
,
1149 struct sk_buff
*skb
);
1150 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1152 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1154 return NAPI_GRO_CB(skb
)->data_offset
;
1157 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1159 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1162 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1164 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1167 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1168 unsigned int offset
)
1170 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1173 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1175 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1178 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1179 unsigned int offset
)
1181 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1182 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1183 return pskb_may_pull(skb
, hlen
) ? skb
->data
+ offset
: NULL
;
1186 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1188 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1191 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1193 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1194 skb_network_offset(skb
);
1197 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1198 unsigned short type
,
1199 const void *daddr
, const void *saddr
,
1202 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1205 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1208 static inline int dev_parse_header(const struct sk_buff
*skb
,
1209 unsigned char *haddr
)
1211 const struct net_device
*dev
= skb
->dev
;
1213 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1215 return dev
->header_ops
->parse(skb
, haddr
);
1218 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1219 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1220 static inline int unregister_gifconf(unsigned int family
)
1222 return register_gifconf(family
, NULL
);
1226 * Incoming packets are placed on per-cpu queues so that
1227 * no locking is needed.
1231 struct Qdisc
*output_queue
;
1232 struct sk_buff_head input_pkt_queue
;
1233 struct list_head poll_list
;
1234 struct sk_buff
*completion_queue
;
1236 struct napi_struct backlog
;
1239 DECLARE_PER_CPU(struct softnet_data
,softnet_data
);
1241 #define HAVE_NETIF_QUEUE
1243 extern void __netif_schedule(struct Qdisc
*q
);
1245 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1247 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1248 __netif_schedule(txq
->qdisc
);
1251 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1255 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1256 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1259 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1261 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1265 * netif_start_queue - allow transmit
1266 * @dev: network device
1268 * Allow upper layers to call the device hard_start_xmit routine.
1270 static inline void netif_start_queue(struct net_device
*dev
)
1272 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1275 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1279 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1280 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1281 netif_tx_start_queue(txq
);
1285 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1287 #ifdef CONFIG_NETPOLL_TRAP
1288 if (netpoll_trap()) {
1289 netif_tx_start_queue(dev_queue
);
1293 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1294 __netif_schedule(dev_queue
->qdisc
);
1298 * netif_wake_queue - restart transmit
1299 * @dev: network device
1301 * Allow upper layers to call the device hard_start_xmit routine.
1302 * Used for flow control when transmit resources are available.
1304 static inline void netif_wake_queue(struct net_device
*dev
)
1306 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1309 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1313 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1314 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1315 netif_tx_wake_queue(txq
);
1319 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1321 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1325 * netif_stop_queue - stop transmitted packets
1326 * @dev: network device
1328 * Stop upper layers calling the device hard_start_xmit routine.
1329 * Used for flow control when transmit resources are unavailable.
1331 static inline void netif_stop_queue(struct net_device
*dev
)
1333 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1336 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1340 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1341 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1342 netif_tx_stop_queue(txq
);
1346 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1348 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1352 * netif_queue_stopped - test if transmit queue is flowblocked
1353 * @dev: network device
1355 * Test if transmit queue on device is currently unable to send.
1357 static inline int netif_queue_stopped(const struct net_device
*dev
)
1359 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1362 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1364 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1368 * netif_running - test if up
1369 * @dev: network device
1371 * Test if the device has been brought up.
1373 static inline int netif_running(const struct net_device
*dev
)
1375 return test_bit(__LINK_STATE_START
, &dev
->state
);
1379 * Routines to manage the subqueues on a device. We only need start
1380 * stop, and a check if it's stopped. All other device management is
1381 * done at the overall netdevice level.
1382 * Also test the device if we're multiqueue.
1386 * netif_start_subqueue - allow sending packets on subqueue
1387 * @dev: network device
1388 * @queue_index: sub queue index
1390 * Start individual transmit queue of a device with multiple transmit queues.
1392 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1394 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1396 netif_tx_start_queue(txq
);
1400 * netif_stop_subqueue - stop sending packets on subqueue
1401 * @dev: network device
1402 * @queue_index: sub queue index
1404 * Stop individual transmit queue of a device with multiple transmit queues.
1406 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1408 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1409 #ifdef CONFIG_NETPOLL_TRAP
1413 netif_tx_stop_queue(txq
);
1417 * netif_subqueue_stopped - test status of subqueue
1418 * @dev: network device
1419 * @queue_index: sub queue index
1421 * Check individual transmit queue of a device with multiple transmit queues.
1423 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1426 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1428 return netif_tx_queue_stopped(txq
);
1431 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1432 struct sk_buff
*skb
)
1434 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1438 * netif_wake_subqueue - allow sending packets on subqueue
1439 * @dev: network device
1440 * @queue_index: sub queue index
1442 * Resume individual transmit queue of a device with multiple transmit queues.
1444 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1446 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1447 #ifdef CONFIG_NETPOLL_TRAP
1451 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1452 __netif_schedule(txq
->qdisc
);
1456 * netif_is_multiqueue - test if device has multiple transmit queues
1457 * @dev: network device
1459 * Check if device has multiple transmit queues
1461 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1463 return (dev
->num_tx_queues
> 1);
1466 /* Use this variant when it is known for sure that it
1467 * is executing from hardware interrupt context or with hardware interrupts
1470 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1472 /* Use this variant in places where it could be invoked
1473 * from either hardware interrupt or other context, with hardware interrupts
1474 * either disabled or enabled.
1476 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1478 #define HAVE_NETIF_RX 1
1479 extern int netif_rx(struct sk_buff
*skb
);
1480 extern int netif_rx_ni(struct sk_buff
*skb
);
1481 #define HAVE_NETIF_RECEIVE_SKB 1
1482 extern int netif_receive_skb(struct sk_buff
*skb
);
1483 extern void napi_gro_flush(struct napi_struct
*napi
);
1484 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
1485 struct sk_buff
*skb
);
1486 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
1487 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
1488 struct sk_buff
*skb
);
1489 extern void napi_reuse_skb(struct napi_struct
*napi
,
1490 struct sk_buff
*skb
);
1491 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1492 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
1493 struct sk_buff
*skb
,
1495 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1496 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
1498 static inline void napi_free_frags(struct napi_struct
*napi
)
1500 kfree_skb(napi
->skb
);
1504 extern void netif_nit_deliver(struct sk_buff
*skb
);
1505 extern int dev_valid_name(const char *name
);
1506 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1507 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1508 extern unsigned dev_get_flags(const struct net_device
*);
1509 extern int dev_change_flags(struct net_device
*, unsigned);
1510 extern int dev_change_name(struct net_device
*, const char *);
1511 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1512 extern int dev_change_net_namespace(struct net_device
*,
1513 struct net
*, const char *);
1514 extern int dev_set_mtu(struct net_device
*, int);
1515 extern int dev_set_mac_address(struct net_device
*,
1517 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1518 struct net_device
*dev
,
1519 struct netdev_queue
*txq
);
1521 extern int netdev_budget
;
1523 /* Called by rtnetlink.c:rtnl_unlock() */
1524 extern void netdev_run_todo(void);
1527 * dev_put - release reference to device
1528 * @dev: network device
1530 * Release reference to device to allow it to be freed.
1532 static inline void dev_put(struct net_device
*dev
)
1534 atomic_dec(&dev
->refcnt
);
1538 * dev_hold - get reference to device
1539 * @dev: network device
1541 * Hold reference to device to keep it from being freed.
1543 static inline void dev_hold(struct net_device
*dev
)
1545 atomic_inc(&dev
->refcnt
);
1548 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1549 * and _off may be called from IRQ context, but it is caller
1550 * who is responsible for serialization of these calls.
1552 * The name carrier is inappropriate, these functions should really be
1553 * called netif_lowerlayer_*() because they represent the state of any
1554 * kind of lower layer not just hardware media.
1557 extern void linkwatch_fire_event(struct net_device
*dev
);
1560 * netif_carrier_ok - test if carrier present
1561 * @dev: network device
1563 * Check if carrier is present on device
1565 static inline int netif_carrier_ok(const struct net_device
*dev
)
1567 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1570 extern unsigned long dev_trans_start(struct net_device
*dev
);
1572 extern void __netdev_watchdog_up(struct net_device
*dev
);
1574 extern void netif_carrier_on(struct net_device
*dev
);
1576 extern void netif_carrier_off(struct net_device
*dev
);
1579 * netif_dormant_on - mark device as dormant.
1580 * @dev: network device
1582 * Mark device as dormant (as per RFC2863).
1584 * The dormant state indicates that the relevant interface is not
1585 * actually in a condition to pass packets (i.e., it is not 'up') but is
1586 * in a "pending" state, waiting for some external event. For "on-
1587 * demand" interfaces, this new state identifies the situation where the
1588 * interface is waiting for events to place it in the up state.
1591 static inline void netif_dormant_on(struct net_device
*dev
)
1593 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1594 linkwatch_fire_event(dev
);
1598 * netif_dormant_off - set device as not dormant.
1599 * @dev: network device
1601 * Device is not in dormant state.
1603 static inline void netif_dormant_off(struct net_device
*dev
)
1605 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1606 linkwatch_fire_event(dev
);
1610 * netif_dormant - test if carrier present
1611 * @dev: network device
1613 * Check if carrier is present on device
1615 static inline int netif_dormant(const struct net_device
*dev
)
1617 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1622 * netif_oper_up - test if device is operational
1623 * @dev: network device
1625 * Check if carrier is operational
1627 static inline int netif_oper_up(const struct net_device
*dev
) {
1628 return (dev
->operstate
== IF_OPER_UP
||
1629 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1633 * netif_device_present - is device available or removed
1634 * @dev: network device
1636 * Check if device has not been removed from system.
1638 static inline int netif_device_present(struct net_device
*dev
)
1640 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1643 extern void netif_device_detach(struct net_device
*dev
);
1645 extern void netif_device_attach(struct net_device
*dev
);
1648 * Network interface message level settings
1650 #define HAVE_NETIF_MSG 1
1653 NETIF_MSG_DRV
= 0x0001,
1654 NETIF_MSG_PROBE
= 0x0002,
1655 NETIF_MSG_LINK
= 0x0004,
1656 NETIF_MSG_TIMER
= 0x0008,
1657 NETIF_MSG_IFDOWN
= 0x0010,
1658 NETIF_MSG_IFUP
= 0x0020,
1659 NETIF_MSG_RX_ERR
= 0x0040,
1660 NETIF_MSG_TX_ERR
= 0x0080,
1661 NETIF_MSG_TX_QUEUED
= 0x0100,
1662 NETIF_MSG_INTR
= 0x0200,
1663 NETIF_MSG_TX_DONE
= 0x0400,
1664 NETIF_MSG_RX_STATUS
= 0x0800,
1665 NETIF_MSG_PKTDATA
= 0x1000,
1666 NETIF_MSG_HW
= 0x2000,
1667 NETIF_MSG_WOL
= 0x4000,
1670 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1671 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1672 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1673 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1674 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1675 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1676 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1677 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1678 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1679 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1680 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1681 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1682 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1683 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1684 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1686 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1689 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1690 return default_msg_enable_bits
;
1691 if (debug_value
== 0) /* no output */
1693 /* set low N bits */
1694 return (1 << debug_value
) - 1;
1697 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1699 spin_lock(&txq
->_xmit_lock
);
1700 txq
->xmit_lock_owner
= cpu
;
1703 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1705 spin_lock_bh(&txq
->_xmit_lock
);
1706 txq
->xmit_lock_owner
= smp_processor_id();
1709 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1711 int ok
= spin_trylock(&txq
->_xmit_lock
);
1713 txq
->xmit_lock_owner
= smp_processor_id();
1717 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1719 txq
->xmit_lock_owner
= -1;
1720 spin_unlock(&txq
->_xmit_lock
);
1723 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
1725 txq
->xmit_lock_owner
= -1;
1726 spin_unlock_bh(&txq
->_xmit_lock
);
1729 static inline void txq_trans_update(struct netdev_queue
*txq
)
1731 if (txq
->xmit_lock_owner
!= -1)
1732 txq
->trans_start
= jiffies
;
1736 * netif_tx_lock - grab network device transmit lock
1737 * @dev: network device
1739 * Get network device transmit lock
1741 static inline void netif_tx_lock(struct net_device
*dev
)
1746 spin_lock(&dev
->tx_global_lock
);
1747 cpu
= smp_processor_id();
1748 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1749 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1751 /* We are the only thread of execution doing a
1752 * freeze, but we have to grab the _xmit_lock in
1753 * order to synchronize with threads which are in
1754 * the ->hard_start_xmit() handler and already
1755 * checked the frozen bit.
1757 __netif_tx_lock(txq
, cpu
);
1758 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1759 __netif_tx_unlock(txq
);
1763 static inline void netif_tx_lock_bh(struct net_device
*dev
)
1769 static inline void netif_tx_unlock(struct net_device
*dev
)
1773 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1774 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1776 /* No need to grab the _xmit_lock here. If the
1777 * queue is not stopped for another reason, we
1780 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1781 netif_schedule_queue(txq
);
1783 spin_unlock(&dev
->tx_global_lock
);
1786 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
1788 netif_tx_unlock(dev
);
1792 #define HARD_TX_LOCK(dev, txq, cpu) { \
1793 if ((dev->features & NETIF_F_LLTX) == 0) { \
1794 __netif_tx_lock(txq, cpu); \
1798 #define HARD_TX_UNLOCK(dev, txq) { \
1799 if ((dev->features & NETIF_F_LLTX) == 0) { \
1800 __netif_tx_unlock(txq); \
1804 static inline void netif_tx_disable(struct net_device
*dev
)
1810 cpu
= smp_processor_id();
1811 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1812 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1814 __netif_tx_lock(txq
, cpu
);
1815 netif_tx_stop_queue(txq
);
1816 __netif_tx_unlock(txq
);
1821 static inline void netif_addr_lock(struct net_device
*dev
)
1823 spin_lock(&dev
->addr_list_lock
);
1826 static inline void netif_addr_lock_bh(struct net_device
*dev
)
1828 spin_lock_bh(&dev
->addr_list_lock
);
1831 static inline void netif_addr_unlock(struct net_device
*dev
)
1833 spin_unlock(&dev
->addr_list_lock
);
1836 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
1838 spin_unlock_bh(&dev
->addr_list_lock
);
1842 * dev_addrs walker. Should be used only for read access. Call with
1843 * rcu_read_lock held.
1845 #define for_each_dev_addr(dev, ha) \
1846 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1848 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1850 extern void ether_setup(struct net_device
*dev
);
1852 /* Support for loadable net-drivers */
1853 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
1854 void (*setup
)(struct net_device
*),
1855 unsigned int queue_count
);
1856 #define alloc_netdev(sizeof_priv, name, setup) \
1857 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1858 extern int register_netdev(struct net_device
*dev
);
1859 extern void unregister_netdev(struct net_device
*dev
);
1861 /* Functions used for device addresses handling */
1862 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
1863 unsigned char addr_type
);
1864 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
1865 unsigned char addr_type
);
1866 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
1867 struct net_device
*from_dev
,
1868 unsigned char addr_type
);
1869 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
1870 struct net_device
*from_dev
,
1871 unsigned char addr_type
);
1873 /* Functions used for secondary unicast and multicast support */
1874 extern void dev_set_rx_mode(struct net_device
*dev
);
1875 extern void __dev_set_rx_mode(struct net_device
*dev
);
1876 extern int dev_unicast_delete(struct net_device
*dev
, void *addr
);
1877 extern int dev_unicast_add(struct net_device
*dev
, void *addr
);
1878 extern int dev_unicast_sync(struct net_device
*to
, struct net_device
*from
);
1879 extern void dev_unicast_unsync(struct net_device
*to
, struct net_device
*from
);
1880 extern int dev_mc_delete(struct net_device
*dev
, void *addr
, int alen
, int all
);
1881 extern int dev_mc_add(struct net_device
*dev
, void *addr
, int alen
, int newonly
);
1882 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
1883 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
1884 extern int __dev_addr_delete(struct dev_addr_list
**list
, int *count
, void *addr
, int alen
, int all
);
1885 extern int __dev_addr_add(struct dev_addr_list
**list
, int *count
, void *addr
, int alen
, int newonly
);
1886 extern int __dev_addr_sync(struct dev_addr_list
**to
, int *to_count
, struct dev_addr_list
**from
, int *from_count
);
1887 extern void __dev_addr_unsync(struct dev_addr_list
**to
, int *to_count
, struct dev_addr_list
**from
, int *from_count
);
1888 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
1889 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
1890 extern void netdev_state_change(struct net_device
*dev
);
1891 extern void netdev_bonding_change(struct net_device
*dev
,
1892 unsigned long event
);
1893 extern void netdev_features_change(struct net_device
*dev
);
1894 /* Load a device via the kmod */
1895 extern void dev_load(struct net
*net
, const char *name
);
1896 extern void dev_mcast_init(void);
1897 extern const struct net_device_stats
*dev_get_stats(struct net_device
*dev
);
1899 extern int netdev_max_backlog
;
1900 extern int weight_p
;
1901 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
1902 extern int skb_checksum_help(struct sk_buff
*skb
);
1903 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
1905 extern void netdev_rx_csum_fault(struct net_device
*dev
);
1907 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
1911 /* rx skb timestamps */
1912 extern void net_enable_timestamp(void);
1913 extern void net_disable_timestamp(void);
1915 #ifdef CONFIG_PROC_FS
1916 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
1917 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
1918 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
1921 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
1922 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
1924 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
1926 extern void linkwatch_run_queue(void);
1928 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
1929 unsigned long mask
);
1930 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
1932 static inline int net_gso_ok(int features
, int gso_type
)
1934 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
1935 return (features
& feature
) == feature
;
1938 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
1940 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
1941 (!skb_has_frags(skb
) || (features
& NETIF_F_FRAGLIST
));
1944 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
1946 return skb_is_gso(skb
) &&
1947 (!skb_gso_ok(skb
, dev
->features
) ||
1948 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
1951 static inline void netif_set_gso_max_size(struct net_device
*dev
,
1954 dev
->gso_max_size
= size
;
1957 static inline void skb_bond_set_mac_by_master(struct sk_buff
*skb
,
1958 struct net_device
*master
)
1960 if (skb
->pkt_type
== PACKET_HOST
) {
1961 u16
*dest
= (u16
*) eth_hdr(skb
)->h_dest
;
1963 memcpy(dest
, master
->dev_addr
, ETH_ALEN
);
1967 /* On bonding slaves other than the currently active slave, suppress
1968 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1969 * ARP on active-backup slaves with arp_validate enabled.
1971 static inline int skb_bond_should_drop(struct sk_buff
*skb
)
1973 struct net_device
*dev
= skb
->dev
;
1974 struct net_device
*master
= dev
->master
;
1977 if (master
->priv_flags
& IFF_MASTER_ARPMON
)
1978 dev
->last_rx
= jiffies
;
1980 if ((master
->priv_flags
& IFF_MASTER_ALB
) && master
->br_port
) {
1981 /* Do address unmangle. The local destination address
1982 * will be always the one master has. Provides the right
1983 * functionality in a bridge.
1985 skb_bond_set_mac_by_master(skb
, master
);
1988 if (dev
->priv_flags
& IFF_SLAVE_INACTIVE
) {
1989 if ((dev
->priv_flags
& IFF_SLAVE_NEEDARP
) &&
1990 skb
->protocol
== __cpu_to_be16(ETH_P_ARP
))
1993 if (master
->priv_flags
& IFF_MASTER_ALB
) {
1994 if (skb
->pkt_type
!= PACKET_BROADCAST
&&
1995 skb
->pkt_type
!= PACKET_MULTICAST
)
1998 if (master
->priv_flags
& IFF_MASTER_8023AD
&&
1999 skb
->protocol
== __cpu_to_be16(ETH_P_SLOW
))
2008 extern struct pernet_operations __net_initdata loopback_net_ops
;
2010 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
2011 struct ethtool_cmd
*cmd
)
2013 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
2015 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
2018 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
2020 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
2022 return dev
->ethtool_ops
->get_rx_csum(dev
);
2025 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
2027 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
2029 return dev
->ethtool_ops
->get_flags(dev
);
2031 #endif /* __KERNEL__ */
2033 #endif /* _LINUX_NETDEVICE_H */