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 unsigned short 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_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
317 #define NETIF_F_UFO (SKB_GSO_UDPV4 << NETIF_F_GSO_SHIFT)
318 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
319 #define NETIF_F_TSO_ECN (SKB_GSO_TCPV4_ECN << NETIF_F_GSO_SHIFT)
321 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
322 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
324 struct net_device
*next_sched
;
326 /* Interface index. Unique device identifier */
331 struct net_device_stats
* (*get_stats
)(struct net_device
*dev
);
332 struct iw_statistics
* (*get_wireless_stats
)(struct net_device
*dev
);
334 /* List of functions to handle Wireless Extensions (instead of ioctl).
335 * See <net/iw_handler.h> for details. Jean II */
336 const struct iw_handler_def
* wireless_handlers
;
337 /* Instance data managed by the core of Wireless Extensions. */
338 struct iw_public_data
* wireless_data
;
340 struct ethtool_ops
*ethtool_ops
;
343 * This marks the end of the "visible" part of the structure. All
344 * fields hereafter are internal to the system, and may change at
345 * will (read: may be cleaned up at will).
349 unsigned int flags
; /* interface flags (a la BSD) */
350 unsigned short gflags
;
351 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
352 unsigned short padded
; /* How much padding added by alloc_netdev() */
354 unsigned char operstate
; /* RFC2863 operstate */
355 unsigned char link_mode
; /* mapping policy to operstate */
357 unsigned mtu
; /* interface MTU value */
358 unsigned short type
; /* interface hardware type */
359 unsigned short hard_header_len
; /* hardware hdr length */
361 struct net_device
*master
; /* Pointer to master device of a group,
362 * which this device is member of.
365 /* Interface address info. */
366 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
367 unsigned char addr_len
; /* hardware address length */
368 unsigned short dev_id
; /* for shared network cards */
370 struct dev_mc_list
*mc_list
; /* Multicast mac addresses */
371 int mc_count
; /* Number of installed mcasts */
376 /* Protocol specific pointers */
378 void *atalk_ptr
; /* AppleTalk link */
379 void *ip_ptr
; /* IPv4 specific data */
380 void *dn_ptr
; /* DECnet specific data */
381 void *ip6_ptr
; /* IPv6 specific data */
382 void *ec_ptr
; /* Econet specific data */
383 void *ax25_ptr
; /* AX.25 specific data */
386 * Cache line mostly used on receive path (including eth_type_trans())
388 struct list_head poll_list ____cacheline_aligned_in_smp
;
389 /* Link to poll list */
391 int (*poll
) (struct net_device
*dev
, int *quota
);
394 unsigned long last_rx
; /* Time of last Rx */
395 /* Interface address info used in eth_type_trans() */
396 unsigned char dev_addr
[MAX_ADDR_LEN
]; /* hw address, (before bcast
397 because most packets are unicast) */
399 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
402 * Cache line mostly used on queue transmit path (qdisc)
404 /* device queue lock */
405 spinlock_t queue_lock ____cacheline_aligned_in_smp
;
407 struct Qdisc
*qdisc_sleeping
;
408 struct list_head qdisc_list
;
409 unsigned long tx_queue_len
; /* Max frames per queue allowed */
411 /* Partially transmitted GSO packet. */
412 struct sk_buff
*gso_skb
;
414 /* ingress path synchronizer */
415 spinlock_t ingress_lock
;
416 struct Qdisc
*qdisc_ingress
;
419 * One part is mostly used on xmit path (device)
421 /* hard_start_xmit synchronizer */
422 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
423 /* cpu id of processor entered to hard_start_xmit or -1,
424 if nobody entered there.
427 void *priv
; /* pointer to private data */
428 int (*hard_start_xmit
) (struct sk_buff
*skb
,
429 struct net_device
*dev
);
430 /* These may be needed for future network-power-down code. */
431 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
433 int watchdog_timeo
; /* used by dev_watchdog() */
434 struct timer_list watchdog_timer
;
437 * refcnt is a very hot point, so align it on SMP
439 /* Number of references to this device */
440 atomic_t refcnt ____cacheline_aligned_in_smp
;
442 /* delayed register/unregister */
443 struct list_head todo_list
;
444 /* device index hash chain */
445 struct hlist_node index_hlist
;
447 /* register/unregister state machine */
448 enum { NETREG_UNINITIALIZED
=0,
449 NETREG_REGISTERED
, /* completed register_netdevice */
450 NETREG_UNREGISTERING
, /* called unregister_netdevice */
451 NETREG_UNREGISTERED
, /* completed unregister todo */
452 NETREG_RELEASED
, /* called free_netdev */
455 /* Called after device is detached from network. */
456 void (*uninit
)(struct net_device
*dev
);
457 /* Called after last user reference disappears. */
458 void (*destructor
)(struct net_device
*dev
);
460 /* Pointers to interface service routines. */
461 int (*open
)(struct net_device
*dev
);
462 int (*stop
)(struct net_device
*dev
);
463 #define HAVE_NETDEV_POLL
464 int (*hard_header
) (struct sk_buff
*skb
,
465 struct net_device
*dev
,
470 int (*rebuild_header
)(struct sk_buff
*skb
);
471 #define HAVE_MULTICAST
472 void (*set_multicast_list
)(struct net_device
*dev
);
473 #define HAVE_SET_MAC_ADDR
474 int (*set_mac_address
)(struct net_device
*dev
,
476 #define HAVE_PRIVATE_IOCTL
477 int (*do_ioctl
)(struct net_device
*dev
,
478 struct ifreq
*ifr
, int cmd
);
479 #define HAVE_SET_CONFIG
480 int (*set_config
)(struct net_device
*dev
,
482 #define HAVE_HEADER_CACHE
483 int (*hard_header_cache
)(struct neighbour
*neigh
,
484 struct hh_cache
*hh
);
485 void (*header_cache_update
)(struct hh_cache
*hh
,
486 struct net_device
*dev
,
487 unsigned char * haddr
);
488 #define HAVE_CHANGE_MTU
489 int (*change_mtu
)(struct net_device
*dev
, int new_mtu
);
491 #define HAVE_TX_TIMEOUT
492 void (*tx_timeout
) (struct net_device
*dev
);
494 void (*vlan_rx_register
)(struct net_device
*dev
,
495 struct vlan_group
*grp
);
496 void (*vlan_rx_add_vid
)(struct net_device
*dev
,
498 void (*vlan_rx_kill_vid
)(struct net_device
*dev
,
501 int (*hard_header_parse
)(struct sk_buff
*skb
,
502 unsigned char *haddr
);
503 int (*neigh_setup
)(struct net_device
*dev
, struct neigh_parms
*);
504 #ifdef CONFIG_NETPOLL
505 struct netpoll_info
*npinfo
;
507 #ifdef CONFIG_NET_POLL_CONTROLLER
508 void (*poll_controller
)(struct net_device
*dev
);
512 struct net_bridge_port
*br_port
;
514 #ifdef CONFIG_NET_DIVERT
515 /* this will get initialized at each interface type init routine */
516 struct divert_blk
*divert
;
517 #endif /* CONFIG_NET_DIVERT */
519 /* class/net/name entry */
520 struct class_device class_dev
;
521 /* space for optional statistics and wireless sysfs groups */
522 struct attribute_group
*sysfs_groups
[3];
525 #define NETDEV_ALIGN 32
526 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
528 static inline void *netdev_priv(struct net_device
*dev
)
530 return (char *)dev
+ ((sizeof(struct net_device
)
531 + NETDEV_ALIGN_CONST
)
532 & ~NETDEV_ALIGN_CONST
);
535 #define SET_MODULE_OWNER(dev) do { } while (0)
536 /* Set the sysfs physical device reference for the network logical device
537 * if set prior to registration will cause a symlink during initialization.
539 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
542 __be16 type
; /* This is really htons(ether_type). */
543 struct net_device
*dev
; /* NULL is wildcarded here */
544 int (*func
) (struct sk_buff
*,
546 struct packet_type
*,
547 struct net_device
*);
548 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
550 void *af_packet_priv
;
551 struct list_head list
;
554 #include <linux/interrupt.h>
555 #include <linux/notifier.h>
557 extern struct net_device loopback_dev
; /* The loopback */
558 extern struct net_device
*dev_base
; /* All devices */
559 extern rwlock_t dev_base_lock
; /* Device list lock */
561 extern int netdev_boot_setup_check(struct net_device
*dev
);
562 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
563 extern struct net_device
*dev_getbyhwaddr(unsigned short type
, char *hwaddr
);
564 extern struct net_device
*dev_getfirstbyhwtype(unsigned short type
);
565 extern void dev_add_pack(struct packet_type
*pt
);
566 extern void dev_remove_pack(struct packet_type
*pt
);
567 extern void __dev_remove_pack(struct packet_type
*pt
);
569 extern struct net_device
*dev_get_by_flags(unsigned short flags
,
570 unsigned short mask
);
571 extern struct net_device
*dev_get_by_name(const char *name
);
572 extern struct net_device
*__dev_get_by_name(const char *name
);
573 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
574 extern int dev_open(struct net_device
*dev
);
575 extern int dev_close(struct net_device
*dev
);
576 extern int dev_queue_xmit(struct sk_buff
*skb
);
577 extern int register_netdevice(struct net_device
*dev
);
578 extern int unregister_netdevice(struct net_device
*dev
);
579 extern void free_netdev(struct net_device
*dev
);
580 extern void synchronize_net(void);
581 extern int register_netdevice_notifier(struct notifier_block
*nb
);
582 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
583 extern int call_netdevice_notifiers(unsigned long val
, void *v
);
584 extern struct net_device
*dev_get_by_index(int ifindex
);
585 extern struct net_device
*__dev_get_by_index(int ifindex
);
586 extern int dev_restart(struct net_device
*dev
);
587 #ifdef CONFIG_NETPOLL_TRAP
588 extern int netpoll_trap(void);
591 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
592 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
593 static inline int unregister_gifconf(unsigned int family
)
595 return register_gifconf(family
, NULL
);
599 * Incoming packets are placed on per-cpu queues so that
600 * no locking is needed.
605 struct net_device
*output_queue
;
606 struct sk_buff_head input_pkt_queue
;
607 struct list_head poll_list
;
608 struct sk_buff
*completion_queue
;
610 struct net_device backlog_dev
; /* Sorry. 8) */
611 #ifdef CONFIG_NET_DMA
612 struct dma_chan
*net_dma
;
616 DECLARE_PER_CPU(struct softnet_data
,softnet_data
);
618 #define HAVE_NETIF_QUEUE
620 extern void __netif_schedule(struct net_device
*dev
);
622 static inline void netif_schedule(struct net_device
*dev
)
624 if (!test_bit(__LINK_STATE_XOFF
, &dev
->state
))
625 __netif_schedule(dev
);
628 static inline void netif_start_queue(struct net_device
*dev
)
630 clear_bit(__LINK_STATE_XOFF
, &dev
->state
);
633 static inline void netif_wake_queue(struct net_device
*dev
)
635 #ifdef CONFIG_NETPOLL_TRAP
639 if (test_and_clear_bit(__LINK_STATE_XOFF
, &dev
->state
))
640 __netif_schedule(dev
);
643 static inline void netif_stop_queue(struct net_device
*dev
)
645 #ifdef CONFIG_NETPOLL_TRAP
649 set_bit(__LINK_STATE_XOFF
, &dev
->state
);
652 static inline int netif_queue_stopped(const struct net_device
*dev
)
654 return test_bit(__LINK_STATE_XOFF
, &dev
->state
);
657 static inline int netif_running(const struct net_device
*dev
)
659 return test_bit(__LINK_STATE_START
, &dev
->state
);
663 /* Use this variant when it is known for sure that it
664 * is executing from interrupt context.
666 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
668 if (atomic_dec_and_test(&skb
->users
)) {
669 struct softnet_data
*sd
;
672 local_irq_save(flags
);
673 sd
= &__get_cpu_var(softnet_data
);
674 skb
->next
= sd
->completion_queue
;
675 sd
->completion_queue
= skb
;
676 raise_softirq_irqoff(NET_TX_SOFTIRQ
);
677 local_irq_restore(flags
);
681 /* Use this variant in places where it could be invoked
682 * either from interrupt or non-interrupt context.
684 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
686 #define HAVE_NETIF_RX 1
687 extern int netif_rx(struct sk_buff
*skb
);
688 extern int netif_rx_ni(struct sk_buff
*skb
);
689 #define HAVE_NETIF_RECEIVE_SKB 1
690 extern int netif_receive_skb(struct sk_buff
*skb
);
691 extern int dev_valid_name(const char *name
);
692 extern int dev_ioctl(unsigned int cmd
, void __user
*);
693 extern int dev_ethtool(struct ifreq
*);
694 extern unsigned dev_get_flags(const struct net_device
*);
695 extern int dev_change_flags(struct net_device
*, unsigned);
696 extern int dev_change_name(struct net_device
*, char *);
697 extern int dev_set_mtu(struct net_device
*, int);
698 extern int dev_set_mac_address(struct net_device
*,
700 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
701 struct net_device
*dev
);
703 extern void dev_init(void);
705 extern int netdev_budget
;
707 /* Called by rtnetlink.c:rtnl_unlock() */
708 extern void netdev_run_todo(void);
710 static inline void dev_put(struct net_device
*dev
)
712 atomic_dec(&dev
->refcnt
);
715 static inline void dev_hold(struct net_device
*dev
)
717 atomic_inc(&dev
->refcnt
);
720 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
721 * and _off may be called from IRQ context, but it is caller
722 * who is responsible for serialization of these calls.
724 * The name carrier is inappropriate, these functions should really be
725 * called netif_lowerlayer_*() because they represent the state of any
726 * kind of lower layer not just hardware media.
729 extern void linkwatch_fire_event(struct net_device
*dev
);
731 static inline int netif_carrier_ok(const struct net_device
*dev
)
733 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
736 extern void __netdev_watchdog_up(struct net_device
*dev
);
738 extern void netif_carrier_on(struct net_device
*dev
);
740 extern void netif_carrier_off(struct net_device
*dev
);
742 static inline void netif_dormant_on(struct net_device
*dev
)
744 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
745 linkwatch_fire_event(dev
);
748 static inline void netif_dormant_off(struct net_device
*dev
)
750 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
751 linkwatch_fire_event(dev
);
754 static inline int netif_dormant(const struct net_device
*dev
)
756 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
760 static inline int netif_oper_up(const struct net_device
*dev
) {
761 return (dev
->operstate
== IF_OPER_UP
||
762 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
766 static inline int netif_device_present(struct net_device
*dev
)
768 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
771 extern void netif_device_detach(struct net_device
*dev
);
773 extern void netif_device_attach(struct net_device
*dev
);
776 * Network interface message level settings
778 #define HAVE_NETIF_MSG 1
781 NETIF_MSG_DRV
= 0x0001,
782 NETIF_MSG_PROBE
= 0x0002,
783 NETIF_MSG_LINK
= 0x0004,
784 NETIF_MSG_TIMER
= 0x0008,
785 NETIF_MSG_IFDOWN
= 0x0010,
786 NETIF_MSG_IFUP
= 0x0020,
787 NETIF_MSG_RX_ERR
= 0x0040,
788 NETIF_MSG_TX_ERR
= 0x0080,
789 NETIF_MSG_TX_QUEUED
= 0x0100,
790 NETIF_MSG_INTR
= 0x0200,
791 NETIF_MSG_TX_DONE
= 0x0400,
792 NETIF_MSG_RX_STATUS
= 0x0800,
793 NETIF_MSG_PKTDATA
= 0x1000,
794 NETIF_MSG_HW
= 0x2000,
795 NETIF_MSG_WOL
= 0x4000,
798 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
799 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
800 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
801 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
802 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
803 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
804 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
805 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
806 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
807 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
808 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
809 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
810 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
811 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
812 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
814 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
817 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
818 return default_msg_enable_bits
;
819 if (debug_value
== 0) /* no output */
822 return (1 << debug_value
) - 1;
825 /* Test if receive needs to be scheduled */
826 static inline int __netif_rx_schedule_prep(struct net_device
*dev
)
828 return !test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
831 /* Test if receive needs to be scheduled but only if up */
832 static inline int netif_rx_schedule_prep(struct net_device
*dev
)
834 return netif_running(dev
) && __netif_rx_schedule_prep(dev
);
837 /* Add interface to tail of rx poll list. This assumes that _prep has
838 * already been called and returned 1.
841 extern void __netif_rx_schedule(struct net_device
*dev
);
843 /* Try to reschedule poll. Called by irq handler. */
845 static inline void netif_rx_schedule(struct net_device
*dev
)
847 if (netif_rx_schedule_prep(dev
))
848 __netif_rx_schedule(dev
);
851 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
852 * Do not inline this?
854 static inline int netif_rx_reschedule(struct net_device
*dev
, int undo
)
856 if (netif_rx_schedule_prep(dev
)) {
861 local_irq_save(flags
);
862 list_add_tail(&dev
->poll_list
, &__get_cpu_var(softnet_data
).poll_list
);
863 __raise_softirq_irqoff(NET_RX_SOFTIRQ
);
864 local_irq_restore(flags
);
870 /* Remove interface from poll list: it must be in the poll list
871 * on current cpu. This primitive is called by dev->poll(), when
872 * it completes the work. The device cannot be out of poll list at this
873 * moment, it is BUG().
875 static inline void netif_rx_complete(struct net_device
*dev
)
879 local_irq_save(flags
);
880 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED
, &dev
->state
));
881 list_del(&dev
->poll_list
);
882 smp_mb__before_clear_bit();
883 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
884 local_irq_restore(flags
);
887 static inline void netif_poll_disable(struct net_device
*dev
)
889 while (test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
))
891 schedule_timeout_interruptible(1);
894 static inline void netif_poll_enable(struct net_device
*dev
)
896 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
899 /* same as netif_rx_complete, except that local_irq_save(flags)
900 * has already been issued
902 static inline void __netif_rx_complete(struct net_device
*dev
)
904 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED
, &dev
->state
));
905 list_del(&dev
->poll_list
);
906 smp_mb__before_clear_bit();
907 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
910 static inline void netif_tx_lock(struct net_device
*dev
)
912 spin_lock(&dev
->_xmit_lock
);
913 dev
->xmit_lock_owner
= smp_processor_id();
916 static inline void netif_tx_lock_bh(struct net_device
*dev
)
918 spin_lock_bh(&dev
->_xmit_lock
);
919 dev
->xmit_lock_owner
= smp_processor_id();
922 static inline int netif_tx_trylock(struct net_device
*dev
)
924 int err
= spin_trylock(&dev
->_xmit_lock
);
926 dev
->xmit_lock_owner
= smp_processor_id();
930 static inline void netif_tx_unlock(struct net_device
*dev
)
932 dev
->xmit_lock_owner
= -1;
933 spin_unlock(&dev
->_xmit_lock
);
936 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
938 dev
->xmit_lock_owner
= -1;
939 spin_unlock_bh(&dev
->_xmit_lock
);
942 static inline void netif_tx_disable(struct net_device
*dev
)
944 netif_tx_lock_bh(dev
);
945 netif_stop_queue(dev
);
946 netif_tx_unlock_bh(dev
);
949 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
951 extern void ether_setup(struct net_device
*dev
);
953 /* Support for loadable net-drivers */
954 extern struct net_device
*alloc_netdev(int sizeof_priv
, const char *name
,
955 void (*setup
)(struct net_device
*));
956 extern int register_netdev(struct net_device
*dev
);
957 extern void unregister_netdev(struct net_device
*dev
);
958 /* Functions used for multicast support */
959 extern void dev_mc_upload(struct net_device
*dev
);
960 extern int dev_mc_delete(struct net_device
*dev
, void *addr
, int alen
, int all
);
961 extern int dev_mc_add(struct net_device
*dev
, void *addr
, int alen
, int newonly
);
962 extern void dev_mc_discard(struct net_device
*dev
);
963 extern void dev_set_promiscuity(struct net_device
*dev
, int inc
);
964 extern void dev_set_allmulti(struct net_device
*dev
, int inc
);
965 extern void netdev_state_change(struct net_device
*dev
);
966 extern void netdev_features_change(struct net_device
*dev
);
967 /* Load a device via the kmod */
968 extern void dev_load(const char *name
);
969 extern void dev_mcast_init(void);
970 extern int netdev_max_backlog
;
972 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
973 extern int skb_checksum_help(struct sk_buff
*skb
, int inward
);
974 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
976 extern void netdev_rx_csum_fault(struct net_device
*dev
);
978 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
982 /* rx skb timestamps */
983 extern void net_enable_timestamp(void);
984 extern void net_disable_timestamp(void);
986 #ifdef CONFIG_PROC_FS
987 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
988 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
989 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
992 extern void linkwatch_run_queue(void);
994 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
996 int feature
= skb_shinfo(skb
)->gso_size
?
997 skb_shinfo(skb
)->gso_type
<< NETIF_F_GSO_SHIFT
: 0;
998 return (features
& feature
) == feature
;
1001 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
1003 return !skb_gso_ok(skb
, dev
->features
);
1006 #endif /* __KERNEL__ */
1008 #endif /* _LINUX_DEV_H */