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.Cox@linux.org>
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 <asm/atomic.h>
34 #include <asm/cache.h>
35 #include <asm/byteorder.h>
37 #include <linux/device.h>
38 #include <linux/percpu.h>
39 #include <linux/dmaengine.h>
45 /* source back-compat hooks */
46 #define SET_ETHTOOL_OPS(netdev,ops) \
47 ( (netdev)->ethtool_ops = (ops) )
49 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
50 functions are available. */
51 #define HAVE_FREE_NETDEV /* free_netdev() */
52 #define HAVE_NETDEV_PRIV /* netdev_priv() */
54 #define NET_XMIT_SUCCESS 0
55 #define NET_XMIT_DROP 1 /* skb dropped */
56 #define NET_XMIT_CN 2 /* congestion notification */
57 #define NET_XMIT_POLICED 3 /* skb is shot by police */
58 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
59 (TC use only - dev_queue_xmit
60 returns this as NET_XMIT_SUCCESS) */
62 /* Backlog congestion levels */
63 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
64 #define NET_RX_DROP 1 /* packet dropped */
65 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
66 #define NET_RX_CN_MOD 3 /* Storm on its way! */
67 #define NET_RX_CN_HIGH 4 /* The storm is here */
68 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
70 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
74 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
76 /* Driver transmit return codes */
77 #define NETDEV_TX_OK 0 /* driver took care of packet */
78 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
79 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
82 * Compute the worst case header length according to the protocols
86 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
87 #define LL_MAX_HEADER 32
89 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
90 #define LL_MAX_HEADER 96
92 #define LL_MAX_HEADER 48
96 #if !defined(CONFIG_NET_IPIP) && \
97 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
98 #define MAX_HEADER LL_MAX_HEADER
100 #define MAX_HEADER (LL_MAX_HEADER + 48)
104 * Network device statistics. Akin to the 2.0 ether stats but
105 * with byte counters.
108 struct net_device_stats
110 unsigned long rx_packets
; /* total packets received */
111 unsigned long tx_packets
; /* total packets transmitted */
112 unsigned long rx_bytes
; /* total bytes received */
113 unsigned long tx_bytes
; /* total bytes transmitted */
114 unsigned long rx_errors
; /* bad packets received */
115 unsigned long tx_errors
; /* packet transmit problems */
116 unsigned long rx_dropped
; /* no space in linux buffers */
117 unsigned long tx_dropped
; /* no space available in linux */
118 unsigned long multicast
; /* multicast packets received */
119 unsigned long collisions
;
121 /* detailed rx_errors: */
122 unsigned long rx_length_errors
;
123 unsigned long rx_over_errors
; /* receiver ring buff overflow */
124 unsigned long rx_crc_errors
; /* recved pkt with crc error */
125 unsigned long rx_frame_errors
; /* recv'd frame alignment error */
126 unsigned long rx_fifo_errors
; /* recv'r fifo overrun */
127 unsigned long rx_missed_errors
; /* receiver missed packet */
129 /* detailed tx_errors */
130 unsigned long tx_aborted_errors
;
131 unsigned long tx_carrier_errors
;
132 unsigned long tx_fifo_errors
;
133 unsigned long tx_heartbeat_errors
;
134 unsigned long tx_window_errors
;
137 unsigned long rx_compressed
;
138 unsigned long tx_compressed
;
142 /* Media selection options. */
155 #include <linux/cache.h>
156 #include <linux/skbuff.h>
162 struct netif_rx_stats
166 unsigned time_squeeze
;
167 unsigned cpu_collision
;
170 DECLARE_PER_CPU(struct netif_rx_stats
, netdev_rx_stat
);
174 * We tag multicasts with these structures.
179 struct dev_mc_list
*next
;
180 __u8 dmi_addr
[MAX_ADDR_LEN
];
181 unsigned char dmi_addrlen
;
188 struct hh_cache
*hh_next
; /* Next entry */
189 atomic_t hh_refcnt
; /* number of users */
190 __be16 hh_type
; /* protocol identifier, f.e ETH_P_IP
191 * NOTE: For VLANs, this will be the
192 * encapuslated type. --BLG
194 int hh_len
; /* length of header */
195 int (*hh_output
)(struct sk_buff
*skb
);
198 /* cached hardware header; allow for machine alignment needs. */
199 #define HH_DATA_MOD 16
200 #define HH_DATA_OFF(__len) \
201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
202 #define HH_DATA_ALIGN(__len) \
203 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
204 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
207 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
209 * dev->hard_header_len ? (dev->hard_header_len +
210 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
212 * We could use other alignment values, but we must maintain the
213 * relationship HH alignment <= LL alignment.
215 #define LL_RESERVED_SPACE(dev) \
216 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
217 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
218 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
220 /* These flag bits are private to the generic network queueing
221 * layer, they may not be explicitly referenced by any other
229 __LINK_STATE_PRESENT
,
231 __LINK_STATE_NOCARRIER
,
232 __LINK_STATE_RX_SCHED
,
233 __LINK_STATE_LINKWATCH_PENDING
,
234 __LINK_STATE_DORMANT
,
235 __LINK_STATE_QDISC_RUNNING
,
240 * This structure holds at boot time configured netdevice settings. They
241 * are then used in the device probing.
243 struct netdev_boot_setup
{
247 #define NETDEV_BOOT_SETUP_MAX 8
249 extern int __init
netdev_boot_setup(char *str
);
252 * The DEVICE structure.
253 * Actually, this whole structure is a big mistake. It mixes I/O
254 * data with strictly "high-level" data, and it has to know about
255 * almost every data structure used in the INET module.
257 * FIXME: cleanup struct net_device such that network protocol info
265 * This is the first field of the "visible" part of this structure
266 * (i.e. as seen by users in the "Space.c" file). It is the name
270 /* device name hash chain */
271 struct hlist_node name_hlist
;
274 * I/O specific fields
275 * FIXME: Merge these and struct ifmap into one
277 unsigned long mem_end
; /* shared mem end */
278 unsigned long mem_start
; /* shared mem start */
279 unsigned long base_addr
; /* device I/O address */
280 unsigned int irq
; /* device IRQ number */
283 * Some hardware also needs these fields, but they are not
284 * part of the usual set specified in Space.c.
287 unsigned char if_port
; /* Selectable AUI, TP,..*/
288 unsigned char dma
; /* DMA channel */
292 struct net_device
*next
;
294 /* The device initialization function. Called only once. */
295 int (*init
)(struct net_device
*dev
);
297 /* ------- Fields preinitialized in Space.c finish here ------- */
299 /* Net device features */
300 unsigned long features
;
301 #define NETIF_F_SG 1 /* Scatter/gather IO. */
302 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
303 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
304 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
305 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
306 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
307 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
308 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
309 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
310 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
311 #define NETIF_F_GSO 2048 /* Enable software GSO. */
312 #define NETIF_F_LLTX 4096 /* LockLess TX */
314 /* Segmentation offload features */
315 #define NETIF_F_GSO_SHIFT 16
316 #define NETIF_F_GSO_MASK 0xffff0000
317 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
318 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
319 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
320 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
321 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
323 /* List of features with software fallbacks. */
324 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
326 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
327 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
329 struct net_device
*next_sched
;
331 /* Interface index. Unique device identifier */
336 struct net_device_stats
* (*get_stats
)(struct net_device
*dev
);
338 /* List of functions to handle Wireless Extensions (instead of ioctl).
339 * See <net/iw_handler.h> for details. Jean II */
340 const struct iw_handler_def
* wireless_handlers
;
341 /* Instance data managed by the core of Wireless Extensions. */
342 struct iw_public_data
* wireless_data
;
344 const struct ethtool_ops
*ethtool_ops
;
347 * This marks the end of the "visible" part of the structure. All
348 * fields hereafter are internal to the system, and may change at
349 * will (read: may be cleaned up at will).
353 unsigned int flags
; /* interface flags (a la BSD) */
354 unsigned short gflags
;
355 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
356 unsigned short padded
; /* How much padding added by alloc_netdev() */
358 unsigned char operstate
; /* RFC2863 operstate */
359 unsigned char link_mode
; /* mapping policy to operstate */
361 unsigned mtu
; /* interface MTU value */
362 unsigned short type
; /* interface hardware type */
363 unsigned short hard_header_len
; /* hardware hdr length */
365 struct net_device
*master
; /* Pointer to master device of a group,
366 * which this device is member of.
369 /* Interface address info. */
370 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
371 unsigned char addr_len
; /* hardware address length */
372 unsigned short dev_id
; /* for shared network cards */
374 struct dev_mc_list
*mc_list
; /* Multicast mac addresses */
375 int mc_count
; /* Number of installed mcasts */
380 /* Protocol specific pointers */
382 void *atalk_ptr
; /* AppleTalk link */
383 void *ip_ptr
; /* IPv4 specific data */
384 void *dn_ptr
; /* DECnet specific data */
385 void *ip6_ptr
; /* IPv6 specific data */
386 void *ec_ptr
; /* Econet specific data */
387 void *ax25_ptr
; /* AX.25 specific data */
390 * Cache line mostly used on receive path (including eth_type_trans())
392 struct list_head poll_list ____cacheline_aligned_in_smp
;
393 /* Link to poll list */
395 int (*poll
) (struct net_device
*dev
, int *quota
);
398 unsigned long last_rx
; /* Time of last Rx */
399 /* Interface address info used in eth_type_trans() */
400 unsigned char dev_addr
[MAX_ADDR_LEN
]; /* hw address, (before bcast
401 because most packets are unicast) */
403 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
406 * Cache line mostly used on queue transmit path (qdisc)
408 /* device queue lock */
409 spinlock_t queue_lock ____cacheline_aligned_in_smp
;
411 struct Qdisc
*qdisc_sleeping
;
412 struct list_head qdisc_list
;
413 unsigned long tx_queue_len
; /* Max frames per queue allowed */
415 /* Partially transmitted GSO packet. */
416 struct sk_buff
*gso_skb
;
418 /* ingress path synchronizer */
419 spinlock_t ingress_lock
;
420 struct Qdisc
*qdisc_ingress
;
423 * One part is mostly used on xmit path (device)
425 /* hard_start_xmit synchronizer */
426 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
427 /* cpu id of processor entered to hard_start_xmit or -1,
428 if nobody entered there.
431 void *priv
; /* pointer to private data */
432 int (*hard_start_xmit
) (struct sk_buff
*skb
,
433 struct net_device
*dev
);
434 /* These may be needed for future network-power-down code. */
435 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
437 int watchdog_timeo
; /* used by dev_watchdog() */
438 struct timer_list watchdog_timer
;
441 * refcnt is a very hot point, so align it on SMP
443 /* Number of references to this device */
444 atomic_t refcnt ____cacheline_aligned_in_smp
;
446 /* delayed register/unregister */
447 struct list_head todo_list
;
448 /* device index hash chain */
449 struct hlist_node index_hlist
;
451 /* register/unregister state machine */
452 enum { NETREG_UNINITIALIZED
=0,
453 NETREG_REGISTERED
, /* completed register_netdevice */
454 NETREG_UNREGISTERING
, /* called unregister_netdevice */
455 NETREG_UNREGISTERED
, /* completed unregister todo */
456 NETREG_RELEASED
, /* called free_netdev */
459 /* Called after device is detached from network. */
460 void (*uninit
)(struct net_device
*dev
);
461 /* Called after last user reference disappears. */
462 void (*destructor
)(struct net_device
*dev
);
464 /* Pointers to interface service routines. */
465 int (*open
)(struct net_device
*dev
);
466 int (*stop
)(struct net_device
*dev
);
467 #define HAVE_NETDEV_POLL
468 int (*hard_header
) (struct sk_buff
*skb
,
469 struct net_device
*dev
,
474 int (*rebuild_header
)(struct sk_buff
*skb
);
475 #define HAVE_MULTICAST
476 void (*set_multicast_list
)(struct net_device
*dev
);
477 #define HAVE_SET_MAC_ADDR
478 int (*set_mac_address
)(struct net_device
*dev
,
480 #define HAVE_PRIVATE_IOCTL
481 int (*do_ioctl
)(struct net_device
*dev
,
482 struct ifreq
*ifr
, int cmd
);
483 #define HAVE_SET_CONFIG
484 int (*set_config
)(struct net_device
*dev
,
486 #define HAVE_HEADER_CACHE
487 int (*hard_header_cache
)(struct neighbour
*neigh
,
488 struct hh_cache
*hh
);
489 void (*header_cache_update
)(struct hh_cache
*hh
,
490 struct net_device
*dev
,
491 unsigned char * haddr
);
492 #define HAVE_CHANGE_MTU
493 int (*change_mtu
)(struct net_device
*dev
, int new_mtu
);
495 #define HAVE_TX_TIMEOUT
496 void (*tx_timeout
) (struct net_device
*dev
);
498 void (*vlan_rx_register
)(struct net_device
*dev
,
499 struct vlan_group
*grp
);
500 void (*vlan_rx_add_vid
)(struct net_device
*dev
,
502 void (*vlan_rx_kill_vid
)(struct net_device
*dev
,
505 int (*hard_header_parse
)(struct sk_buff
*skb
,
506 unsigned char *haddr
);
507 int (*neigh_setup
)(struct net_device
*dev
, struct neigh_parms
*);
508 #ifdef CONFIG_NETPOLL
509 struct netpoll_info
*npinfo
;
511 #ifdef CONFIG_NET_POLL_CONTROLLER
512 void (*poll_controller
)(struct net_device
*dev
);
516 struct net_bridge_port
*br_port
;
518 #ifdef CONFIG_NET_DIVERT
519 /* this will get initialized at each interface type init routine */
520 struct divert_blk
*divert
;
521 #endif /* CONFIG_NET_DIVERT */
523 /* class/net/name entry */
524 struct class_device class_dev
;
525 /* space for optional statistics and wireless sysfs groups */
526 struct attribute_group
*sysfs_groups
[3];
529 #define NETDEV_ALIGN 32
530 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
532 static inline void *netdev_priv(struct net_device
*dev
)
534 return (char *)dev
+ ((sizeof(struct net_device
)
535 + NETDEV_ALIGN_CONST
)
536 & ~NETDEV_ALIGN_CONST
);
539 #define SET_MODULE_OWNER(dev) do { } while (0)
540 /* Set the sysfs physical device reference for the network logical device
541 * if set prior to registration will cause a symlink during initialization.
543 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
546 __be16 type
; /* This is really htons(ether_type). */
547 struct net_device
*dev
; /* NULL is wildcarded here */
548 int (*func
) (struct sk_buff
*,
550 struct packet_type
*,
551 struct net_device
*);
552 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
554 int (*gso_send_check
)(struct sk_buff
*skb
);
555 void *af_packet_priv
;
556 struct list_head list
;
559 #include <linux/interrupt.h>
560 #include <linux/notifier.h>
562 extern struct net_device loopback_dev
; /* The loopback */
563 extern struct net_device
*dev_base
; /* All devices */
564 extern rwlock_t dev_base_lock
; /* Device list lock */
566 extern int netdev_boot_setup_check(struct net_device
*dev
);
567 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
568 extern struct net_device
*dev_getbyhwaddr(unsigned short type
, char *hwaddr
);
569 extern struct net_device
*dev_getfirstbyhwtype(unsigned short type
);
570 extern void dev_add_pack(struct packet_type
*pt
);
571 extern void dev_remove_pack(struct packet_type
*pt
);
572 extern void __dev_remove_pack(struct packet_type
*pt
);
574 extern struct net_device
*dev_get_by_flags(unsigned short flags
,
575 unsigned short mask
);
576 extern struct net_device
*dev_get_by_name(const char *name
);
577 extern struct net_device
*__dev_get_by_name(const char *name
);
578 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
579 extern int dev_open(struct net_device
*dev
);
580 extern int dev_close(struct net_device
*dev
);
581 extern int dev_queue_xmit(struct sk_buff
*skb
);
582 extern int register_netdevice(struct net_device
*dev
);
583 extern int unregister_netdevice(struct net_device
*dev
);
584 extern void free_netdev(struct net_device
*dev
);
585 extern void synchronize_net(void);
586 extern int register_netdevice_notifier(struct notifier_block
*nb
);
587 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
588 extern int call_netdevice_notifiers(unsigned long val
, void *v
);
589 extern struct net_device
*dev_get_by_index(int ifindex
);
590 extern struct net_device
*__dev_get_by_index(int ifindex
);
591 extern int dev_restart(struct net_device
*dev
);
592 #ifdef CONFIG_NETPOLL_TRAP
593 extern int netpoll_trap(void);
596 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
597 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
598 static inline int unregister_gifconf(unsigned int family
)
600 return register_gifconf(family
, NULL
);
604 * Incoming packets are placed on per-cpu queues so that
605 * no locking is needed.
610 struct net_device
*output_queue
;
611 struct sk_buff_head input_pkt_queue
;
612 struct list_head poll_list
;
613 struct sk_buff
*completion_queue
;
615 struct net_device backlog_dev
; /* Sorry. 8) */
616 #ifdef CONFIG_NET_DMA
617 struct dma_chan
*net_dma
;
621 DECLARE_PER_CPU(struct softnet_data
,softnet_data
);
623 #define HAVE_NETIF_QUEUE
625 extern void __netif_schedule(struct net_device
*dev
);
627 static inline void netif_schedule(struct net_device
*dev
)
629 if (!test_bit(__LINK_STATE_XOFF
, &dev
->state
))
630 __netif_schedule(dev
);
633 static inline void netif_start_queue(struct net_device
*dev
)
635 clear_bit(__LINK_STATE_XOFF
, &dev
->state
);
638 static inline void netif_wake_queue(struct net_device
*dev
)
640 #ifdef CONFIG_NETPOLL_TRAP
644 if (test_and_clear_bit(__LINK_STATE_XOFF
, &dev
->state
))
645 __netif_schedule(dev
);
648 static inline void netif_stop_queue(struct net_device
*dev
)
650 #ifdef CONFIG_NETPOLL_TRAP
654 set_bit(__LINK_STATE_XOFF
, &dev
->state
);
657 static inline int netif_queue_stopped(const struct net_device
*dev
)
659 return test_bit(__LINK_STATE_XOFF
, &dev
->state
);
662 static inline int netif_running(const struct net_device
*dev
)
664 return test_bit(__LINK_STATE_START
, &dev
->state
);
668 /* Use this variant when it is known for sure that it
669 * is executing from interrupt context.
671 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
673 if (atomic_dec_and_test(&skb
->users
)) {
674 struct softnet_data
*sd
;
677 local_irq_save(flags
);
678 sd
= &__get_cpu_var(softnet_data
);
679 skb
->next
= sd
->completion_queue
;
680 sd
->completion_queue
= skb
;
681 raise_softirq_irqoff(NET_TX_SOFTIRQ
);
682 local_irq_restore(flags
);
686 /* Use this variant in places where it could be invoked
687 * either from interrupt or non-interrupt context.
689 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
691 #define HAVE_NETIF_RX 1
692 extern int netif_rx(struct sk_buff
*skb
);
693 extern int netif_rx_ni(struct sk_buff
*skb
);
694 #define HAVE_NETIF_RECEIVE_SKB 1
695 extern int netif_receive_skb(struct sk_buff
*skb
);
696 extern int dev_valid_name(const char *name
);
697 extern int dev_ioctl(unsigned int cmd
, void __user
*);
698 extern int dev_ethtool(struct ifreq
*);
699 extern unsigned dev_get_flags(const struct net_device
*);
700 extern int dev_change_flags(struct net_device
*, unsigned);
701 extern int dev_change_name(struct net_device
*, char *);
702 extern int dev_set_mtu(struct net_device
*, int);
703 extern int dev_set_mac_address(struct net_device
*,
705 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
706 struct net_device
*dev
);
708 extern void dev_init(void);
710 extern int netdev_budget
;
712 /* Called by rtnetlink.c:rtnl_unlock() */
713 extern void netdev_run_todo(void);
715 static inline void dev_put(struct net_device
*dev
)
717 atomic_dec(&dev
->refcnt
);
720 static inline void dev_hold(struct net_device
*dev
)
722 atomic_inc(&dev
->refcnt
);
725 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
726 * and _off may be called from IRQ context, but it is caller
727 * who is responsible for serialization of these calls.
729 * The name carrier is inappropriate, these functions should really be
730 * called netif_lowerlayer_*() because they represent the state of any
731 * kind of lower layer not just hardware media.
734 extern void linkwatch_fire_event(struct net_device
*dev
);
736 static inline int netif_carrier_ok(const struct net_device
*dev
)
738 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
741 extern void __netdev_watchdog_up(struct net_device
*dev
);
743 extern void netif_carrier_on(struct net_device
*dev
);
745 extern void netif_carrier_off(struct net_device
*dev
);
747 static inline void netif_dormant_on(struct net_device
*dev
)
749 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
750 linkwatch_fire_event(dev
);
753 static inline void netif_dormant_off(struct net_device
*dev
)
755 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
756 linkwatch_fire_event(dev
);
759 static inline int netif_dormant(const struct net_device
*dev
)
761 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
765 static inline int netif_oper_up(const struct net_device
*dev
) {
766 return (dev
->operstate
== IF_OPER_UP
||
767 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
771 static inline int netif_device_present(struct net_device
*dev
)
773 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
776 extern void netif_device_detach(struct net_device
*dev
);
778 extern void netif_device_attach(struct net_device
*dev
);
781 * Network interface message level settings
783 #define HAVE_NETIF_MSG 1
786 NETIF_MSG_DRV
= 0x0001,
787 NETIF_MSG_PROBE
= 0x0002,
788 NETIF_MSG_LINK
= 0x0004,
789 NETIF_MSG_TIMER
= 0x0008,
790 NETIF_MSG_IFDOWN
= 0x0010,
791 NETIF_MSG_IFUP
= 0x0020,
792 NETIF_MSG_RX_ERR
= 0x0040,
793 NETIF_MSG_TX_ERR
= 0x0080,
794 NETIF_MSG_TX_QUEUED
= 0x0100,
795 NETIF_MSG_INTR
= 0x0200,
796 NETIF_MSG_TX_DONE
= 0x0400,
797 NETIF_MSG_RX_STATUS
= 0x0800,
798 NETIF_MSG_PKTDATA
= 0x1000,
799 NETIF_MSG_HW
= 0x2000,
800 NETIF_MSG_WOL
= 0x4000,
803 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
804 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
805 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
806 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
807 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
808 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
809 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
810 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
811 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
812 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
813 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
814 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
815 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
816 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
817 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
819 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
822 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
823 return default_msg_enable_bits
;
824 if (debug_value
== 0) /* no output */
827 return (1 << debug_value
) - 1;
830 /* Test if receive needs to be scheduled */
831 static inline int __netif_rx_schedule_prep(struct net_device
*dev
)
833 return !test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
836 /* Test if receive needs to be scheduled but only if up */
837 static inline int netif_rx_schedule_prep(struct net_device
*dev
)
839 return netif_running(dev
) && __netif_rx_schedule_prep(dev
);
842 /* Add interface to tail of rx poll list. This assumes that _prep has
843 * already been called and returned 1.
846 extern void __netif_rx_schedule(struct net_device
*dev
);
848 /* Try to reschedule poll. Called by irq handler. */
850 static inline void netif_rx_schedule(struct net_device
*dev
)
852 if (netif_rx_schedule_prep(dev
))
853 __netif_rx_schedule(dev
);
856 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
857 * Do not inline this?
859 static inline int netif_rx_reschedule(struct net_device
*dev
, int undo
)
861 if (netif_rx_schedule_prep(dev
)) {
866 local_irq_save(flags
);
867 list_add_tail(&dev
->poll_list
, &__get_cpu_var(softnet_data
).poll_list
);
868 __raise_softirq_irqoff(NET_RX_SOFTIRQ
);
869 local_irq_restore(flags
);
875 /* Remove interface from poll list: it must be in the poll list
876 * on current cpu. This primitive is called by dev->poll(), when
877 * it completes the work. The device cannot be out of poll list at this
878 * moment, it is BUG().
880 static inline void netif_rx_complete(struct net_device
*dev
)
884 local_irq_save(flags
);
885 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED
, &dev
->state
));
886 list_del(&dev
->poll_list
);
887 smp_mb__before_clear_bit();
888 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
889 local_irq_restore(flags
);
892 static inline void netif_poll_disable(struct net_device
*dev
)
894 while (test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
))
896 schedule_timeout_interruptible(1);
899 static inline void netif_poll_enable(struct net_device
*dev
)
901 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
904 /* same as netif_rx_complete, except that local_irq_save(flags)
905 * has already been issued
907 static inline void __netif_rx_complete(struct net_device
*dev
)
909 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED
, &dev
->state
));
910 list_del(&dev
->poll_list
);
911 smp_mb__before_clear_bit();
912 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
915 static inline void netif_tx_lock(struct net_device
*dev
)
917 spin_lock(&dev
->_xmit_lock
);
918 dev
->xmit_lock_owner
= smp_processor_id();
921 static inline void netif_tx_lock_bh(struct net_device
*dev
)
923 spin_lock_bh(&dev
->_xmit_lock
);
924 dev
->xmit_lock_owner
= smp_processor_id();
927 static inline int netif_tx_trylock(struct net_device
*dev
)
929 int ok
= spin_trylock(&dev
->_xmit_lock
);
931 dev
->xmit_lock_owner
= smp_processor_id();
935 static inline void netif_tx_unlock(struct net_device
*dev
)
937 dev
->xmit_lock_owner
= -1;
938 spin_unlock(&dev
->_xmit_lock
);
941 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
943 dev
->xmit_lock_owner
= -1;
944 spin_unlock_bh(&dev
->_xmit_lock
);
947 static inline void netif_tx_disable(struct net_device
*dev
)
949 netif_tx_lock_bh(dev
);
950 netif_stop_queue(dev
);
951 netif_tx_unlock_bh(dev
);
954 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
956 extern void ether_setup(struct net_device
*dev
);
958 /* Support for loadable net-drivers */
959 extern struct net_device
*alloc_netdev(int sizeof_priv
, const char *name
,
960 void (*setup
)(struct net_device
*));
961 extern int register_netdev(struct net_device
*dev
);
962 extern void unregister_netdev(struct net_device
*dev
);
963 /* Functions used for multicast support */
964 extern void dev_mc_upload(struct net_device
*dev
);
965 extern int dev_mc_delete(struct net_device
*dev
, void *addr
, int alen
, int all
);
966 extern int dev_mc_add(struct net_device
*dev
, void *addr
, int alen
, int newonly
);
967 extern void dev_mc_discard(struct net_device
*dev
);
968 extern void dev_set_promiscuity(struct net_device
*dev
, int inc
);
969 extern void dev_set_allmulti(struct net_device
*dev
, int inc
);
970 extern void netdev_state_change(struct net_device
*dev
);
971 extern void netdev_features_change(struct net_device
*dev
);
972 /* Load a device via the kmod */
973 extern void dev_load(const char *name
);
974 extern void dev_mcast_init(void);
975 extern int netdev_max_backlog
;
977 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
978 extern int skb_checksum_help(struct sk_buff
*skb
);
979 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
981 extern void netdev_rx_csum_fault(struct net_device
*dev
);
983 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
987 /* rx skb timestamps */
988 extern void net_enable_timestamp(void);
989 extern void net_disable_timestamp(void);
991 #ifdef CONFIG_PROC_FS
992 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
993 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
994 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
997 extern void linkwatch_run_queue(void);
999 static inline int net_gso_ok(int features
, int gso_type
)
1001 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
1002 return (features
& feature
) == feature
;
1005 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
1007 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
);
1010 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
1012 return skb_is_gso(skb
) &&
1013 (!skb_gso_ok(skb
, dev
->features
) ||
1014 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
1017 /* On bonding slaves other than the currently active slave, suppress
1018 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1019 * ARP on active-backup slaves with arp_validate enabled.
1021 static inline int skb_bond_should_drop(struct sk_buff
*skb
)
1023 struct net_device
*dev
= skb
->dev
;
1024 struct net_device
*master
= dev
->master
;
1027 (dev
->priv_flags
& IFF_SLAVE_INACTIVE
)) {
1028 if ((dev
->priv_flags
& IFF_SLAVE_NEEDARP
) &&
1029 skb
->protocol
== __constant_htons(ETH_P_ARP
))
1032 if (master
->priv_flags
& IFF_MASTER_ALB
) {
1033 if (skb
->pkt_type
!= PACKET_BROADCAST
&&
1034 skb
->pkt_type
!= PACKET_MULTICAST
)
1037 if (master
->priv_flags
& IFF_MASTER_8023AD
&&
1038 skb
->protocol
== __constant_htons(ETH_P_SLOW
))
1046 #endif /* __KERNEL__ */
1048 #endif /* _LINUX_DEV_H */