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 <linux/timer.h>
34 #include <asm/atomic.h>
35 #include <asm/cache.h>
36 #include <asm/byteorder.h>
38 #include <linux/device.h>
39 #include <linux/percpu.h>
40 #include <linux/dmaengine.h>
47 /* source back-compat hooks */
48 #define SET_ETHTOOL_OPS(netdev,ops) \
49 ( (netdev)->ethtool_ops = (ops) )
51 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
52 functions are available. */
53 #define HAVE_FREE_NETDEV /* free_netdev() */
54 #define HAVE_NETDEV_PRIV /* netdev_priv() */
56 #define NET_XMIT_SUCCESS 0
57 #define NET_XMIT_DROP 1 /* skb dropped */
58 #define NET_XMIT_CN 2 /* congestion notification */
59 #define NET_XMIT_POLICED 3 /* skb is shot by police */
60 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
61 (TC use only - dev_queue_xmit
62 returns this as NET_XMIT_SUCCESS) */
64 /* Backlog congestion levels */
65 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
66 #define NET_RX_DROP 1 /* packet dropped */
67 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
68 #define NET_RX_CN_MOD 3 /* Storm on its way! */
69 #define NET_RX_CN_HIGH 4 /* The storm is here */
70 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
72 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
73 * indicates that the device will soon be dropping packets, or already drops
74 * some packets of the same priority; prompting us to send less aggressively. */
75 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
76 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
80 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
82 /* Driver transmit return codes */
83 #define NETDEV_TX_OK 0 /* driver took care of packet */
84 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
85 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
88 * Compute the worst case header length according to the protocols
92 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
93 #define LL_MAX_HEADER 32
95 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
96 #define LL_MAX_HEADER 96
98 #define LL_MAX_HEADER 48
102 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
103 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
104 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
105 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
106 #define MAX_HEADER LL_MAX_HEADER
108 #define MAX_HEADER (LL_MAX_HEADER + 48)
112 * Network device statistics. Akin to the 2.0 ether stats but
113 * with byte counters.
116 struct net_device_stats
118 unsigned long rx_packets
; /* total packets received */
119 unsigned long tx_packets
; /* total packets transmitted */
120 unsigned long rx_bytes
; /* total bytes received */
121 unsigned long tx_bytes
; /* total bytes transmitted */
122 unsigned long rx_errors
; /* bad packets received */
123 unsigned long tx_errors
; /* packet transmit problems */
124 unsigned long rx_dropped
; /* no space in linux buffers */
125 unsigned long tx_dropped
; /* no space available in linux */
126 unsigned long multicast
; /* multicast packets received */
127 unsigned long collisions
;
129 /* detailed rx_errors: */
130 unsigned long rx_length_errors
;
131 unsigned long rx_over_errors
; /* receiver ring buff overflow */
132 unsigned long rx_crc_errors
; /* recved pkt with crc error */
133 unsigned long rx_frame_errors
; /* recv'd frame alignment error */
134 unsigned long rx_fifo_errors
; /* recv'r fifo overrun */
135 unsigned long rx_missed_errors
; /* receiver missed packet */
137 /* detailed tx_errors */
138 unsigned long tx_aborted_errors
;
139 unsigned long tx_carrier_errors
;
140 unsigned long tx_fifo_errors
;
141 unsigned long tx_heartbeat_errors
;
142 unsigned long tx_window_errors
;
145 unsigned long rx_compressed
;
146 unsigned long tx_compressed
;
150 /* Media selection options. */
163 #include <linux/cache.h>
164 #include <linux/skbuff.h>
170 struct netif_rx_stats
174 unsigned time_squeeze
;
175 unsigned cpu_collision
;
178 DECLARE_PER_CPU(struct netif_rx_stats
, netdev_rx_stat
);
182 struct dev_addr_list
*next
;
183 u8 da_addr
[MAX_ADDR_LEN
];
190 * We tag multicasts with these structures.
195 struct dev_mc_list
*next
;
196 __u8 dmi_addr
[MAX_ADDR_LEN
];
197 unsigned char dmi_addrlen
;
204 struct hh_cache
*hh_next
; /* Next entry */
205 atomic_t hh_refcnt
; /* number of users */
207 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
209 * They are mostly read, but hh_refcnt may be changed quite frequently,
210 * incurring cache line ping pongs.
212 __be16 hh_type ____cacheline_aligned_in_smp
;
213 /* protocol identifier, f.e ETH_P_IP
214 * NOTE: For VLANs, this will be the
215 * encapuslated type. --BLG
217 u16 hh_len
; /* length of header */
218 int (*hh_output
)(struct sk_buff
*skb
);
221 /* cached hardware header; allow for machine alignment needs. */
222 #define HH_DATA_MOD 16
223 #define HH_DATA_OFF(__len) \
224 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
225 #define HH_DATA_ALIGN(__len) \
226 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
227 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
230 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
232 * dev->hard_header_len ? (dev->hard_header_len +
233 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
235 * We could use other alignment values, but we must maintain the
236 * relationship HH alignment <= LL alignment.
238 #define LL_RESERVED_SPACE(dev) \
239 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
240 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
241 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
243 /* These flag bits are private to the generic network queueing
244 * layer, they may not be explicitly referenced by any other
252 __LINK_STATE_PRESENT
,
254 __LINK_STATE_NOCARRIER
,
255 __LINK_STATE_RX_SCHED
,
256 __LINK_STATE_LINKWATCH_PENDING
,
257 __LINK_STATE_DORMANT
,
258 __LINK_STATE_QDISC_RUNNING
,
263 * This structure holds at boot time configured netdevice settings. They
264 * are then used in the device probing.
266 struct netdev_boot_setup
{
270 #define NETDEV_BOOT_SETUP_MAX 8
272 extern int __init
netdev_boot_setup(char *str
);
275 * The DEVICE structure.
276 * Actually, this whole structure is a big mistake. It mixes I/O
277 * data with strictly "high-level" data, and it has to know about
278 * almost every data structure used in the INET module.
280 * FIXME: cleanup struct net_device such that network protocol info
288 * This is the first field of the "visible" part of this structure
289 * (i.e. as seen by users in the "Space.c" file). It is the name
293 /* device name hash chain */
294 struct hlist_node name_hlist
;
297 * I/O specific fields
298 * FIXME: Merge these and struct ifmap into one
300 unsigned long mem_end
; /* shared mem end */
301 unsigned long mem_start
; /* shared mem start */
302 unsigned long base_addr
; /* device I/O address */
303 unsigned int irq
; /* device IRQ number */
306 * Some hardware also needs these fields, but they are not
307 * part of the usual set specified in Space.c.
310 unsigned char if_port
; /* Selectable AUI, TP,..*/
311 unsigned char dma
; /* DMA channel */
315 struct list_head dev_list
;
317 /* The device initialization function. Called only once. */
318 int (*init
)(struct net_device
*dev
);
320 /* ------- Fields preinitialized in Space.c finish here ------- */
322 /* Net device features */
323 unsigned long features
;
324 #define NETIF_F_SG 1 /* Scatter/gather IO. */
325 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
326 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
327 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
328 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
329 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
330 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
331 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
332 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
333 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
334 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
335 #define NETIF_F_GSO 2048 /* Enable software GSO. */
336 #define NETIF_F_LLTX 4096 /* LockLess TX */
338 /* Segmentation offload features */
339 #define NETIF_F_GSO_SHIFT 16
340 #define NETIF_F_GSO_MASK 0xffff0000
341 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
342 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
343 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
344 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
345 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
347 /* List of features with software fallbacks. */
348 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
351 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
352 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
353 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
354 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
356 struct net_device
*next_sched
;
358 /* Interface index. Unique device identifier */
363 struct net_device_stats
* (*get_stats
)(struct net_device
*dev
);
364 struct net_device_stats stats
;
366 #ifdef CONFIG_WIRELESS_EXT
367 /* List of functions to handle Wireless Extensions (instead of ioctl).
368 * See <net/iw_handler.h> for details. Jean II */
369 const struct iw_handler_def
* wireless_handlers
;
370 /* Instance data managed by the core of Wireless Extensions. */
371 struct iw_public_data
* wireless_data
;
373 const struct ethtool_ops
*ethtool_ops
;
376 * This marks the end of the "visible" part of the structure. All
377 * fields hereafter are internal to the system, and may change at
378 * will (read: may be cleaned up at will).
382 unsigned int flags
; /* interface flags (a la BSD) */
383 unsigned short gflags
;
384 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
385 unsigned short padded
; /* How much padding added by alloc_netdev() */
387 unsigned char operstate
; /* RFC2863 operstate */
388 unsigned char link_mode
; /* mapping policy to operstate */
390 unsigned mtu
; /* interface MTU value */
391 unsigned short type
; /* interface hardware type */
392 unsigned short hard_header_len
; /* hardware hdr length */
394 struct net_device
*master
; /* Pointer to master device of a group,
395 * which this device is member of.
398 /* Interface address info. */
399 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
400 unsigned char addr_len
; /* hardware address length */
401 unsigned short dev_id
; /* for shared network cards */
403 struct dev_mc_list
*mc_list
; /* Multicast mac addresses */
404 int mc_count
; /* Number of installed mcasts */
409 /* Protocol specific pointers */
411 void *atalk_ptr
; /* AppleTalk link */
412 void *ip_ptr
; /* IPv4 specific data */
413 void *dn_ptr
; /* DECnet specific data */
414 void *ip6_ptr
; /* IPv6 specific data */
415 void *ec_ptr
; /* Econet specific data */
416 void *ax25_ptr
; /* AX.25 specific data */
417 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
418 assign before registering */
421 * Cache line mostly used on receive path (including eth_type_trans())
423 struct list_head poll_list ____cacheline_aligned_in_smp
;
424 /* Link to poll list */
426 int (*poll
) (struct net_device
*dev
, int *quota
);
429 unsigned long last_rx
; /* Time of last Rx */
430 /* Interface address info used in eth_type_trans() */
431 unsigned char dev_addr
[MAX_ADDR_LEN
]; /* hw address, (before bcast
432 because most packets are unicast) */
434 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
437 * Cache line mostly used on queue transmit path (qdisc)
439 /* device queue lock */
440 spinlock_t queue_lock ____cacheline_aligned_in_smp
;
442 struct Qdisc
*qdisc_sleeping
;
443 struct list_head qdisc_list
;
444 unsigned long tx_queue_len
; /* Max frames per queue allowed */
446 /* Partially transmitted GSO packet. */
447 struct sk_buff
*gso_skb
;
449 /* ingress path synchronizer */
450 spinlock_t ingress_lock
;
451 struct Qdisc
*qdisc_ingress
;
454 * One part is mostly used on xmit path (device)
456 /* hard_start_xmit synchronizer */
457 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
458 /* cpu id of processor entered to hard_start_xmit or -1,
459 if nobody entered there.
462 void *priv
; /* pointer to private data */
463 int (*hard_start_xmit
) (struct sk_buff
*skb
,
464 struct net_device
*dev
);
465 /* These may be needed for future network-power-down code. */
466 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
468 int watchdog_timeo
; /* used by dev_watchdog() */
469 struct timer_list watchdog_timer
;
472 * refcnt is a very hot point, so align it on SMP
474 /* Number of references to this device */
475 atomic_t refcnt ____cacheline_aligned_in_smp
;
477 /* delayed register/unregister */
478 struct list_head todo_list
;
479 /* device index hash chain */
480 struct hlist_node index_hlist
;
482 struct net_device
*link_watch_next
;
484 /* register/unregister state machine */
485 enum { NETREG_UNINITIALIZED
=0,
486 NETREG_REGISTERED
, /* completed register_netdevice */
487 NETREG_UNREGISTERING
, /* called unregister_netdevice */
488 NETREG_UNREGISTERED
, /* completed unregister todo */
489 NETREG_RELEASED
, /* called free_netdev */
492 /* Called after device is detached from network. */
493 void (*uninit
)(struct net_device
*dev
);
494 /* Called after last user reference disappears. */
495 void (*destructor
)(struct net_device
*dev
);
497 /* Pointers to interface service routines. */
498 int (*open
)(struct net_device
*dev
);
499 int (*stop
)(struct net_device
*dev
);
500 #define HAVE_NETDEV_POLL
501 int (*hard_header
) (struct sk_buff
*skb
,
502 struct net_device
*dev
,
507 int (*rebuild_header
)(struct sk_buff
*skb
);
508 #define HAVE_MULTICAST
509 void (*set_multicast_list
)(struct net_device
*dev
);
510 #define HAVE_SET_MAC_ADDR
511 int (*set_mac_address
)(struct net_device
*dev
,
513 #define HAVE_PRIVATE_IOCTL
514 int (*do_ioctl
)(struct net_device
*dev
,
515 struct ifreq
*ifr
, int cmd
);
516 #define HAVE_SET_CONFIG
517 int (*set_config
)(struct net_device
*dev
,
519 #define HAVE_HEADER_CACHE
520 int (*hard_header_cache
)(struct neighbour
*neigh
,
521 struct hh_cache
*hh
);
522 void (*header_cache_update
)(struct hh_cache
*hh
,
523 struct net_device
*dev
,
524 unsigned char * haddr
);
525 #define HAVE_CHANGE_MTU
526 int (*change_mtu
)(struct net_device
*dev
, int new_mtu
);
528 #define HAVE_TX_TIMEOUT
529 void (*tx_timeout
) (struct net_device
*dev
);
531 void (*vlan_rx_register
)(struct net_device
*dev
,
532 struct vlan_group
*grp
);
533 void (*vlan_rx_add_vid
)(struct net_device
*dev
,
535 void (*vlan_rx_kill_vid
)(struct net_device
*dev
,
538 int (*hard_header_parse
)(struct sk_buff
*skb
,
539 unsigned char *haddr
);
540 int (*neigh_setup
)(struct net_device
*dev
, struct neigh_parms
*);
541 #ifdef CONFIG_NETPOLL
542 struct netpoll_info
*npinfo
;
544 #ifdef CONFIG_NET_POLL_CONTROLLER
545 void (*poll_controller
)(struct net_device
*dev
);
549 struct net_bridge_port
*br_port
;
551 /* class/net/name entry */
553 /* space for optional statistics and wireless sysfs groups */
554 struct attribute_group
*sysfs_groups
[3];
556 /* rtnetlink link ops */
557 const struct rtnl_link_ops
*rtnl_link_ops
;
559 #define to_net_dev(d) container_of(d, struct net_device, dev)
561 #define NETDEV_ALIGN 32
562 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
564 static inline void *netdev_priv(const struct net_device
*dev
)
566 return (char *)dev
+ ((sizeof(struct net_device
)
567 + NETDEV_ALIGN_CONST
)
568 & ~NETDEV_ALIGN_CONST
);
571 #define SET_MODULE_OWNER(dev) do { } while (0)
572 /* Set the sysfs physical device reference for the network logical device
573 * if set prior to registration will cause a symlink during initialization.
575 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
578 __be16 type
; /* This is really htons(ether_type). */
579 struct net_device
*dev
; /* NULL is wildcarded here */
580 int (*func
) (struct sk_buff
*,
582 struct packet_type
*,
583 struct net_device
*);
584 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
586 int (*gso_send_check
)(struct sk_buff
*skb
);
587 void *af_packet_priv
;
588 struct list_head list
;
591 #include <linux/interrupt.h>
592 #include <linux/notifier.h>
594 extern struct net_device loopback_dev
; /* The loopback */
595 extern struct list_head dev_base_head
; /* All devices */
596 extern rwlock_t dev_base_lock
; /* Device list lock */
598 #define for_each_netdev(d) \
599 list_for_each_entry(d, &dev_base_head, dev_list)
600 #define for_each_netdev_safe(d, n) \
601 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
602 #define for_each_netdev_continue(d) \
603 list_for_each_entry_continue(d, &dev_base_head, dev_list)
604 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
606 static inline struct net_device
*next_net_device(struct net_device
*dev
)
608 struct list_head
*lh
;
610 lh
= dev
->dev_list
.next
;
611 return lh
== &dev_base_head
? NULL
: net_device_entry(lh
);
614 static inline struct net_device
*first_net_device(void)
616 return list_empty(&dev_base_head
) ? NULL
:
617 net_device_entry(dev_base_head
.next
);
620 extern int netdev_boot_setup_check(struct net_device
*dev
);
621 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
622 extern struct net_device
*dev_getbyhwaddr(unsigned short type
, char *hwaddr
);
623 extern struct net_device
*dev_getfirstbyhwtype(unsigned short type
);
624 extern struct net_device
*__dev_getfirstbyhwtype(unsigned short type
);
625 extern void dev_add_pack(struct packet_type
*pt
);
626 extern void dev_remove_pack(struct packet_type
*pt
);
627 extern void __dev_remove_pack(struct packet_type
*pt
);
629 extern struct net_device
*dev_get_by_flags(unsigned short flags
,
630 unsigned short mask
);
631 extern struct net_device
*dev_get_by_name(const char *name
);
632 extern struct net_device
*__dev_get_by_name(const char *name
);
633 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
634 extern int dev_open(struct net_device
*dev
);
635 extern int dev_close(struct net_device
*dev
);
636 extern int dev_queue_xmit(struct sk_buff
*skb
);
637 extern int register_netdevice(struct net_device
*dev
);
638 extern void unregister_netdevice(struct net_device
*dev
);
639 extern void free_netdev(struct net_device
*dev
);
640 extern void synchronize_net(void);
641 extern int register_netdevice_notifier(struct notifier_block
*nb
);
642 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
643 extern int call_netdevice_notifiers(unsigned long val
, void *v
);
644 extern struct net_device
*dev_get_by_index(int ifindex
);
645 extern struct net_device
*__dev_get_by_index(int ifindex
);
646 extern int dev_restart(struct net_device
*dev
);
647 #ifdef CONFIG_NETPOLL_TRAP
648 extern int netpoll_trap(void);
651 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
652 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
653 static inline int unregister_gifconf(unsigned int family
)
655 return register_gifconf(family
, NULL
);
659 * Incoming packets are placed on per-cpu queues so that
660 * no locking is needed.
665 struct net_device
*output_queue
;
666 struct sk_buff_head input_pkt_queue
;
667 struct list_head poll_list
;
668 struct sk_buff
*completion_queue
;
670 struct net_device backlog_dev
; /* Sorry. 8) */
671 #ifdef CONFIG_NET_DMA
672 struct dma_chan
*net_dma
;
676 DECLARE_PER_CPU(struct softnet_data
,softnet_data
);
678 #define HAVE_NETIF_QUEUE
680 extern void __netif_schedule(struct net_device
*dev
);
682 static inline void netif_schedule(struct net_device
*dev
)
684 if (!test_bit(__LINK_STATE_XOFF
, &dev
->state
))
685 __netif_schedule(dev
);
688 static inline void netif_start_queue(struct net_device
*dev
)
690 clear_bit(__LINK_STATE_XOFF
, &dev
->state
);
693 static inline void netif_wake_queue(struct net_device
*dev
)
695 #ifdef CONFIG_NETPOLL_TRAP
696 if (netpoll_trap()) {
697 clear_bit(__LINK_STATE_XOFF
, &dev
->state
);
701 if (test_and_clear_bit(__LINK_STATE_XOFF
, &dev
->state
))
702 __netif_schedule(dev
);
705 static inline void netif_stop_queue(struct net_device
*dev
)
707 set_bit(__LINK_STATE_XOFF
, &dev
->state
);
710 static inline int netif_queue_stopped(const struct net_device
*dev
)
712 return test_bit(__LINK_STATE_XOFF
, &dev
->state
);
715 static inline int netif_running(const struct net_device
*dev
)
717 return test_bit(__LINK_STATE_START
, &dev
->state
);
721 /* Use this variant when it is known for sure that it
722 * is executing from interrupt context.
724 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
726 if (atomic_dec_and_test(&skb
->users
)) {
727 struct softnet_data
*sd
;
730 local_irq_save(flags
);
731 sd
= &__get_cpu_var(softnet_data
);
732 skb
->next
= sd
->completion_queue
;
733 sd
->completion_queue
= skb
;
734 raise_softirq_irqoff(NET_TX_SOFTIRQ
);
735 local_irq_restore(flags
);
739 /* Use this variant in places where it could be invoked
740 * either from interrupt or non-interrupt context.
742 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
744 #define HAVE_NETIF_RX 1
745 extern int netif_rx(struct sk_buff
*skb
);
746 extern int netif_rx_ni(struct sk_buff
*skb
);
747 #define HAVE_NETIF_RECEIVE_SKB 1
748 extern int netif_receive_skb(struct sk_buff
*skb
);
749 extern int dev_valid_name(const char *name
);
750 extern int dev_ioctl(unsigned int cmd
, void __user
*);
751 extern int dev_ethtool(struct ifreq
*);
752 extern unsigned dev_get_flags(const struct net_device
*);
753 extern int dev_change_flags(struct net_device
*, unsigned);
754 extern int dev_change_name(struct net_device
*, char *);
755 extern int dev_set_mtu(struct net_device
*, int);
756 extern int dev_set_mac_address(struct net_device
*,
758 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
759 struct net_device
*dev
);
761 extern void dev_init(void);
763 extern int netdev_budget
;
765 /* Called by rtnetlink.c:rtnl_unlock() */
766 extern void netdev_run_todo(void);
768 static inline void dev_put(struct net_device
*dev
)
770 atomic_dec(&dev
->refcnt
);
773 static inline void dev_hold(struct net_device
*dev
)
775 atomic_inc(&dev
->refcnt
);
778 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
779 * and _off may be called from IRQ context, but it is caller
780 * who is responsible for serialization of these calls.
782 * The name carrier is inappropriate, these functions should really be
783 * called netif_lowerlayer_*() because they represent the state of any
784 * kind of lower layer not just hardware media.
787 extern void linkwatch_fire_event(struct net_device
*dev
);
789 static inline int netif_carrier_ok(const struct net_device
*dev
)
791 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
794 extern void __netdev_watchdog_up(struct net_device
*dev
);
796 extern void netif_carrier_on(struct net_device
*dev
);
798 extern void netif_carrier_off(struct net_device
*dev
);
800 static inline void netif_dormant_on(struct net_device
*dev
)
802 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
803 linkwatch_fire_event(dev
);
806 static inline void netif_dormant_off(struct net_device
*dev
)
808 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
809 linkwatch_fire_event(dev
);
812 static inline int netif_dormant(const struct net_device
*dev
)
814 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
818 static inline int netif_oper_up(const struct net_device
*dev
) {
819 return (dev
->operstate
== IF_OPER_UP
||
820 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
824 static inline int netif_device_present(struct net_device
*dev
)
826 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
829 extern void netif_device_detach(struct net_device
*dev
);
831 extern void netif_device_attach(struct net_device
*dev
);
834 * Network interface message level settings
836 #define HAVE_NETIF_MSG 1
839 NETIF_MSG_DRV
= 0x0001,
840 NETIF_MSG_PROBE
= 0x0002,
841 NETIF_MSG_LINK
= 0x0004,
842 NETIF_MSG_TIMER
= 0x0008,
843 NETIF_MSG_IFDOWN
= 0x0010,
844 NETIF_MSG_IFUP
= 0x0020,
845 NETIF_MSG_RX_ERR
= 0x0040,
846 NETIF_MSG_TX_ERR
= 0x0080,
847 NETIF_MSG_TX_QUEUED
= 0x0100,
848 NETIF_MSG_INTR
= 0x0200,
849 NETIF_MSG_TX_DONE
= 0x0400,
850 NETIF_MSG_RX_STATUS
= 0x0800,
851 NETIF_MSG_PKTDATA
= 0x1000,
852 NETIF_MSG_HW
= 0x2000,
853 NETIF_MSG_WOL
= 0x4000,
856 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
857 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
858 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
859 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
860 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
861 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
862 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
863 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
864 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
865 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
866 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
867 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
868 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
869 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
870 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
872 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
875 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
876 return default_msg_enable_bits
;
877 if (debug_value
== 0) /* no output */
880 return (1 << debug_value
) - 1;
883 /* Test if receive needs to be scheduled */
884 static inline int __netif_rx_schedule_prep(struct net_device
*dev
)
886 return !test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
889 /* Test if receive needs to be scheduled but only if up */
890 static inline int netif_rx_schedule_prep(struct net_device
*dev
)
892 return netif_running(dev
) && __netif_rx_schedule_prep(dev
);
895 /* Add interface to tail of rx poll list. This assumes that _prep has
896 * already been called and returned 1.
899 extern void __netif_rx_schedule(struct net_device
*dev
);
901 /* Try to reschedule poll. Called by irq handler. */
903 static inline void netif_rx_schedule(struct net_device
*dev
)
905 if (netif_rx_schedule_prep(dev
))
906 __netif_rx_schedule(dev
);
909 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
910 * Do not inline this?
912 static inline int netif_rx_reschedule(struct net_device
*dev
, int undo
)
914 if (netif_rx_schedule_prep(dev
)) {
919 local_irq_save(flags
);
920 list_add_tail(&dev
->poll_list
, &__get_cpu_var(softnet_data
).poll_list
);
921 __raise_softirq_irqoff(NET_RX_SOFTIRQ
);
922 local_irq_restore(flags
);
928 /* same as netif_rx_complete, except that local_irq_save(flags)
929 * has already been issued
931 static inline void __netif_rx_complete(struct net_device
*dev
)
933 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED
, &dev
->state
));
934 list_del(&dev
->poll_list
);
935 smp_mb__before_clear_bit();
936 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
939 /* Remove interface from poll list: it must be in the poll list
940 * on current cpu. This primitive is called by dev->poll(), when
941 * it completes the work. The device cannot be out of poll list at this
942 * moment, it is BUG().
944 static inline void netif_rx_complete(struct net_device
*dev
)
948 local_irq_save(flags
);
949 __netif_rx_complete(dev
);
950 local_irq_restore(flags
);
953 static inline void netif_poll_disable(struct net_device
*dev
)
955 while (test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
))
957 schedule_timeout_interruptible(1);
960 static inline void netif_poll_enable(struct net_device
*dev
)
962 smp_mb__before_clear_bit();
963 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
966 static inline void netif_tx_lock(struct net_device
*dev
)
968 spin_lock(&dev
->_xmit_lock
);
969 dev
->xmit_lock_owner
= smp_processor_id();
972 static inline void netif_tx_lock_bh(struct net_device
*dev
)
974 spin_lock_bh(&dev
->_xmit_lock
);
975 dev
->xmit_lock_owner
= smp_processor_id();
978 static inline int netif_tx_trylock(struct net_device
*dev
)
980 int ok
= spin_trylock(&dev
->_xmit_lock
);
982 dev
->xmit_lock_owner
= smp_processor_id();
986 static inline void netif_tx_unlock(struct net_device
*dev
)
988 dev
->xmit_lock_owner
= -1;
989 spin_unlock(&dev
->_xmit_lock
);
992 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
994 dev
->xmit_lock_owner
= -1;
995 spin_unlock_bh(&dev
->_xmit_lock
);
998 static inline void netif_tx_disable(struct net_device
*dev
)
1000 netif_tx_lock_bh(dev
);
1001 netif_stop_queue(dev
);
1002 netif_tx_unlock_bh(dev
);
1005 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1007 extern void ether_setup(struct net_device
*dev
);
1009 /* Support for loadable net-drivers */
1010 extern struct net_device
*alloc_netdev(int sizeof_priv
, const char *name
,
1011 void (*setup
)(struct net_device
*));
1012 extern int register_netdev(struct net_device
*dev
);
1013 extern void unregister_netdev(struct net_device
*dev
);
1014 /* Functions used for multicast support */
1015 extern void dev_mc_upload(struct net_device
*dev
);
1016 extern int dev_mc_delete(struct net_device
*dev
, void *addr
, int alen
, int all
);
1017 extern int dev_mc_add(struct net_device
*dev
, void *addr
, int alen
, int newonly
);
1018 extern void dev_mc_discard(struct net_device
*dev
);
1019 extern int __dev_addr_delete(struct dev_addr_list
**list
, void *addr
, int alen
, int all
);
1020 extern int __dev_addr_add(struct dev_addr_list
**list
, void *addr
, int alen
, int newonly
);
1021 extern void __dev_addr_discard(struct dev_addr_list
**list
);
1022 extern void dev_set_promiscuity(struct net_device
*dev
, int inc
);
1023 extern void dev_set_allmulti(struct net_device
*dev
, int inc
);
1024 extern void netdev_state_change(struct net_device
*dev
);
1025 extern void netdev_features_change(struct net_device
*dev
);
1026 /* Load a device via the kmod */
1027 extern void dev_load(const char *name
);
1028 extern void dev_mcast_init(void);
1029 extern int netdev_max_backlog
;
1030 extern int weight_p
;
1031 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
1032 extern int skb_checksum_help(struct sk_buff
*skb
);
1033 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
1035 extern void netdev_rx_csum_fault(struct net_device
*dev
);
1037 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
1041 /* rx skb timestamps */
1042 extern void net_enable_timestamp(void);
1043 extern void net_disable_timestamp(void);
1045 #ifdef CONFIG_PROC_FS
1046 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
1047 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
1048 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
1051 extern void linkwatch_run_queue(void);
1053 static inline int net_gso_ok(int features
, int gso_type
)
1055 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
1056 return (features
& feature
) == feature
;
1059 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
1061 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
);
1064 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
1066 return skb_is_gso(skb
) &&
1067 (!skb_gso_ok(skb
, dev
->features
) ||
1068 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
1071 /* On bonding slaves other than the currently active slave, suppress
1072 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1073 * ARP on active-backup slaves with arp_validate enabled.
1075 static inline int skb_bond_should_drop(struct sk_buff
*skb
)
1077 struct net_device
*dev
= skb
->dev
;
1078 struct net_device
*master
= dev
->master
;
1081 (dev
->priv_flags
& IFF_SLAVE_INACTIVE
)) {
1082 if ((dev
->priv_flags
& IFF_SLAVE_NEEDARP
) &&
1083 skb
->protocol
== __constant_htons(ETH_P_ARP
))
1086 if (master
->priv_flags
& IFF_MASTER_ALB
) {
1087 if (skb
->pkt_type
!= PACKET_BROADCAST
&&
1088 skb
->pkt_type
!= PACKET_MULTICAST
)
1091 if (master
->priv_flags
& IFF_MASTER_8023AD
&&
1092 skb
->protocol
== __constant_htons(ETH_P_SLOW
))
1100 #endif /* __KERNEL__ */
1102 #endif /* _LINUX_DEV_H */