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.
193 #define dev_mc_list dev_addr_list
194 #define dmi_addr da_addr
195 #define dmi_addrlen da_addrlen
196 #define dmi_users da_users
197 #define dmi_gusers da_gusers
201 struct hh_cache
*hh_next
; /* Next entry */
202 atomic_t hh_refcnt
; /* number of users */
204 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
206 * They are mostly read, but hh_refcnt may be changed quite frequently,
207 * incurring cache line ping pongs.
209 __be16 hh_type ____cacheline_aligned_in_smp
;
210 /* protocol identifier, f.e ETH_P_IP
211 * NOTE: For VLANs, this will be the
212 * encapuslated type. --BLG
214 u16 hh_len
; /* length of header */
215 int (*hh_output
)(struct sk_buff
*skb
);
218 /* cached hardware header; allow for machine alignment needs. */
219 #define HH_DATA_MOD 16
220 #define HH_DATA_OFF(__len) \
221 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
222 #define HH_DATA_ALIGN(__len) \
223 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
224 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
227 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
229 * dev->hard_header_len ? (dev->hard_header_len +
230 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
232 * We could use other alignment values, but we must maintain the
233 * relationship HH alignment <= LL alignment.
235 #define LL_RESERVED_SPACE(dev) \
236 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
237 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
238 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
240 /* These flag bits are private to the generic network queueing
241 * layer, they may not be explicitly referenced by any other
249 __LINK_STATE_PRESENT
,
251 __LINK_STATE_NOCARRIER
,
252 __LINK_STATE_RX_SCHED
,
253 __LINK_STATE_LINKWATCH_PENDING
,
254 __LINK_STATE_DORMANT
,
255 __LINK_STATE_QDISC_RUNNING
,
260 * This structure holds at boot time configured netdevice settings. They
261 * are then used in the device probing.
263 struct netdev_boot_setup
{
267 #define NETDEV_BOOT_SETUP_MAX 8
269 extern int __init
netdev_boot_setup(char *str
);
272 * The DEVICE structure.
273 * Actually, this whole structure is a big mistake. It mixes I/O
274 * data with strictly "high-level" data, and it has to know about
275 * almost every data structure used in the INET module.
277 * FIXME: cleanup struct net_device such that network protocol info
285 * This is the first field of the "visible" part of this structure
286 * (i.e. as seen by users in the "Space.c" file). It is the name
290 /* device name hash chain */
291 struct hlist_node name_hlist
;
294 * I/O specific fields
295 * FIXME: Merge these and struct ifmap into one
297 unsigned long mem_end
; /* shared mem end */
298 unsigned long mem_start
; /* shared mem start */
299 unsigned long base_addr
; /* device I/O address */
300 unsigned int irq
; /* device IRQ number */
303 * Some hardware also needs these fields, but they are not
304 * part of the usual set specified in Space.c.
307 unsigned char if_port
; /* Selectable AUI, TP,..*/
308 unsigned char dma
; /* DMA channel */
312 struct list_head dev_list
;
314 /* The device initialization function. Called only once. */
315 int (*init
)(struct net_device
*dev
);
317 /* ------- Fields preinitialized in Space.c finish here ------- */
319 /* Net device features */
320 unsigned long features
;
321 #define NETIF_F_SG 1 /* Scatter/gather IO. */
322 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
323 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
324 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
325 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
326 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
327 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
328 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
329 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
330 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
331 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
332 #define NETIF_F_GSO 2048 /* Enable software GSO. */
333 #define NETIF_F_LLTX 4096 /* LockLess TX */
335 /* Segmentation offload features */
336 #define NETIF_F_GSO_SHIFT 16
337 #define NETIF_F_GSO_MASK 0xffff0000
338 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
339 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
340 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
341 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
342 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
344 /* List of features with software fallbacks. */
345 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
348 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
349 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
350 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
351 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
353 struct net_device
*next_sched
;
355 /* Interface index. Unique device identifier */
360 struct net_device_stats
* (*get_stats
)(struct net_device
*dev
);
361 struct net_device_stats stats
;
363 #ifdef CONFIG_WIRELESS_EXT
364 /* List of functions to handle Wireless Extensions (instead of ioctl).
365 * See <net/iw_handler.h> for details. Jean II */
366 const struct iw_handler_def
* wireless_handlers
;
367 /* Instance data managed by the core of Wireless Extensions. */
368 struct iw_public_data
* wireless_data
;
370 const struct ethtool_ops
*ethtool_ops
;
373 * This marks the end of the "visible" part of the structure. All
374 * fields hereafter are internal to the system, and may change at
375 * will (read: may be cleaned up at will).
379 unsigned int flags
; /* interface flags (a la BSD) */
380 unsigned short gflags
;
381 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
382 unsigned short padded
; /* How much padding added by alloc_netdev() */
384 unsigned char operstate
; /* RFC2863 operstate */
385 unsigned char link_mode
; /* mapping policy to operstate */
387 unsigned mtu
; /* interface MTU value */
388 unsigned short type
; /* interface hardware type */
389 unsigned short hard_header_len
; /* hardware hdr length */
391 struct net_device
*master
; /* Pointer to master device of a group,
392 * which this device is member of.
395 /* Interface address info. */
396 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
397 unsigned char addr_len
; /* hardware address length */
398 unsigned short dev_id
; /* for shared network cards */
400 struct dev_addr_list
*uc_list
; /* Secondary unicast mac addresses */
401 int uc_count
; /* Number of installed ucasts */
403 struct dev_addr_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_SET_RX_MODE
509 void (*set_rx_mode
)(struct net_device
*dev
);
510 #define HAVE_MULTICAST
511 void (*set_multicast_list
)(struct net_device
*dev
);
512 #define HAVE_SET_MAC_ADDR
513 int (*set_mac_address
)(struct net_device
*dev
,
515 #define HAVE_PRIVATE_IOCTL
516 int (*do_ioctl
)(struct net_device
*dev
,
517 struct ifreq
*ifr
, int cmd
);
518 #define HAVE_SET_CONFIG
519 int (*set_config
)(struct net_device
*dev
,
521 #define HAVE_HEADER_CACHE
522 int (*hard_header_cache
)(struct neighbour
*neigh
,
523 struct hh_cache
*hh
);
524 void (*header_cache_update
)(struct hh_cache
*hh
,
525 struct net_device
*dev
,
526 unsigned char * haddr
);
527 #define HAVE_CHANGE_MTU
528 int (*change_mtu
)(struct net_device
*dev
, int new_mtu
);
530 #define HAVE_TX_TIMEOUT
531 void (*tx_timeout
) (struct net_device
*dev
);
533 void (*vlan_rx_register
)(struct net_device
*dev
,
534 struct vlan_group
*grp
);
535 void (*vlan_rx_add_vid
)(struct net_device
*dev
,
537 void (*vlan_rx_kill_vid
)(struct net_device
*dev
,
540 int (*hard_header_parse
)(struct sk_buff
*skb
,
541 unsigned char *haddr
);
542 int (*neigh_setup
)(struct net_device
*dev
, struct neigh_parms
*);
543 #ifdef CONFIG_NETPOLL
544 struct netpoll_info
*npinfo
;
546 #ifdef CONFIG_NET_POLL_CONTROLLER
547 void (*poll_controller
)(struct net_device
*dev
);
551 struct net_bridge_port
*br_port
;
553 /* class/net/name entry */
555 /* space for optional statistics and wireless sysfs groups */
556 struct attribute_group
*sysfs_groups
[3];
558 /* rtnetlink link ops */
559 const struct rtnl_link_ops
*rtnl_link_ops
;
561 #define to_net_dev(d) container_of(d, struct net_device, dev)
563 #define NETDEV_ALIGN 32
564 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
566 static inline void *netdev_priv(const struct net_device
*dev
)
568 return (char *)dev
+ ((sizeof(struct net_device
)
569 + NETDEV_ALIGN_CONST
)
570 & ~NETDEV_ALIGN_CONST
);
573 #define SET_MODULE_OWNER(dev) do { } while (0)
574 /* Set the sysfs physical device reference for the network logical device
575 * if set prior to registration will cause a symlink during initialization.
577 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
580 __be16 type
; /* This is really htons(ether_type). */
581 struct net_device
*dev
; /* NULL is wildcarded here */
582 int (*func
) (struct sk_buff
*,
584 struct packet_type
*,
585 struct net_device
*);
586 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
588 int (*gso_send_check
)(struct sk_buff
*skb
);
589 void *af_packet_priv
;
590 struct list_head list
;
593 #include <linux/interrupt.h>
594 #include <linux/notifier.h>
596 extern struct net_device loopback_dev
; /* The loopback */
597 extern struct list_head dev_base_head
; /* All devices */
598 extern rwlock_t dev_base_lock
; /* Device list lock */
600 #define for_each_netdev(d) \
601 list_for_each_entry(d, &dev_base_head, dev_list)
602 #define for_each_netdev_safe(d, n) \
603 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
604 #define for_each_netdev_continue(d) \
605 list_for_each_entry_continue(d, &dev_base_head, dev_list)
606 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
608 static inline struct net_device
*next_net_device(struct net_device
*dev
)
610 struct list_head
*lh
;
612 lh
= dev
->dev_list
.next
;
613 return lh
== &dev_base_head
? NULL
: net_device_entry(lh
);
616 static inline struct net_device
*first_net_device(void)
618 return list_empty(&dev_base_head
) ? NULL
:
619 net_device_entry(dev_base_head
.next
);
622 extern int netdev_boot_setup_check(struct net_device
*dev
);
623 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
624 extern struct net_device
*dev_getbyhwaddr(unsigned short type
, char *hwaddr
);
625 extern struct net_device
*dev_getfirstbyhwtype(unsigned short type
);
626 extern struct net_device
*__dev_getfirstbyhwtype(unsigned short type
);
627 extern void dev_add_pack(struct packet_type
*pt
);
628 extern void dev_remove_pack(struct packet_type
*pt
);
629 extern void __dev_remove_pack(struct packet_type
*pt
);
631 extern struct net_device
*dev_get_by_flags(unsigned short flags
,
632 unsigned short mask
);
633 extern struct net_device
*dev_get_by_name(const char *name
);
634 extern struct net_device
*__dev_get_by_name(const char *name
);
635 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
636 extern int dev_open(struct net_device
*dev
);
637 extern int dev_close(struct net_device
*dev
);
638 extern int dev_queue_xmit(struct sk_buff
*skb
);
639 extern int register_netdevice(struct net_device
*dev
);
640 extern void unregister_netdevice(struct net_device
*dev
);
641 extern void free_netdev(struct net_device
*dev
);
642 extern void synchronize_net(void);
643 extern int register_netdevice_notifier(struct notifier_block
*nb
);
644 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
645 extern int call_netdevice_notifiers(unsigned long val
, void *v
);
646 extern struct net_device
*dev_get_by_index(int ifindex
);
647 extern struct net_device
*__dev_get_by_index(int ifindex
);
648 extern int dev_restart(struct net_device
*dev
);
649 #ifdef CONFIG_NETPOLL_TRAP
650 extern int netpoll_trap(void);
653 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
654 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
655 static inline int unregister_gifconf(unsigned int family
)
657 return register_gifconf(family
, NULL
);
661 * Incoming packets are placed on per-cpu queues so that
662 * no locking is needed.
667 struct net_device
*output_queue
;
668 struct sk_buff_head input_pkt_queue
;
669 struct list_head poll_list
;
670 struct sk_buff
*completion_queue
;
672 struct net_device backlog_dev
; /* Sorry. 8) */
673 #ifdef CONFIG_NET_DMA
674 struct dma_chan
*net_dma
;
678 DECLARE_PER_CPU(struct softnet_data
,softnet_data
);
680 #define HAVE_NETIF_QUEUE
682 extern void __netif_schedule(struct net_device
*dev
);
684 static inline void netif_schedule(struct net_device
*dev
)
686 if (!test_bit(__LINK_STATE_XOFF
, &dev
->state
))
687 __netif_schedule(dev
);
690 static inline void netif_start_queue(struct net_device
*dev
)
692 clear_bit(__LINK_STATE_XOFF
, &dev
->state
);
695 static inline void netif_wake_queue(struct net_device
*dev
)
697 #ifdef CONFIG_NETPOLL_TRAP
698 if (netpoll_trap()) {
699 clear_bit(__LINK_STATE_XOFF
, &dev
->state
);
703 if (test_and_clear_bit(__LINK_STATE_XOFF
, &dev
->state
))
704 __netif_schedule(dev
);
707 static inline void netif_stop_queue(struct net_device
*dev
)
709 set_bit(__LINK_STATE_XOFF
, &dev
->state
);
712 static inline int netif_queue_stopped(const struct net_device
*dev
)
714 return test_bit(__LINK_STATE_XOFF
, &dev
->state
);
717 static inline int netif_running(const struct net_device
*dev
)
719 return test_bit(__LINK_STATE_START
, &dev
->state
);
723 /* Use this variant when it is known for sure that it
724 * is executing from interrupt context.
726 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
728 if (atomic_dec_and_test(&skb
->users
)) {
729 struct softnet_data
*sd
;
732 local_irq_save(flags
);
733 sd
= &__get_cpu_var(softnet_data
);
734 skb
->next
= sd
->completion_queue
;
735 sd
->completion_queue
= skb
;
736 raise_softirq_irqoff(NET_TX_SOFTIRQ
);
737 local_irq_restore(flags
);
741 /* Use this variant in places where it could be invoked
742 * either from interrupt or non-interrupt context.
744 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
746 #define HAVE_NETIF_RX 1
747 extern int netif_rx(struct sk_buff
*skb
);
748 extern int netif_rx_ni(struct sk_buff
*skb
);
749 #define HAVE_NETIF_RECEIVE_SKB 1
750 extern int netif_receive_skb(struct sk_buff
*skb
);
751 extern int dev_valid_name(const char *name
);
752 extern int dev_ioctl(unsigned int cmd
, void __user
*);
753 extern int dev_ethtool(struct ifreq
*);
754 extern unsigned dev_get_flags(const struct net_device
*);
755 extern int dev_change_flags(struct net_device
*, unsigned);
756 extern int dev_change_name(struct net_device
*, char *);
757 extern int dev_set_mtu(struct net_device
*, int);
758 extern int dev_set_mac_address(struct net_device
*,
760 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
761 struct net_device
*dev
);
763 extern void dev_init(void);
765 extern int netdev_budget
;
767 /* Called by rtnetlink.c:rtnl_unlock() */
768 extern void netdev_run_todo(void);
770 static inline void dev_put(struct net_device
*dev
)
772 atomic_dec(&dev
->refcnt
);
775 static inline void dev_hold(struct net_device
*dev
)
777 atomic_inc(&dev
->refcnt
);
780 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
781 * and _off may be called from IRQ context, but it is caller
782 * who is responsible for serialization of these calls.
784 * The name carrier is inappropriate, these functions should really be
785 * called netif_lowerlayer_*() because they represent the state of any
786 * kind of lower layer not just hardware media.
789 extern void linkwatch_fire_event(struct net_device
*dev
);
791 static inline int netif_carrier_ok(const struct net_device
*dev
)
793 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
796 extern void __netdev_watchdog_up(struct net_device
*dev
);
798 extern void netif_carrier_on(struct net_device
*dev
);
800 extern void netif_carrier_off(struct net_device
*dev
);
802 static inline void netif_dormant_on(struct net_device
*dev
)
804 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
805 linkwatch_fire_event(dev
);
808 static inline void netif_dormant_off(struct net_device
*dev
)
810 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
811 linkwatch_fire_event(dev
);
814 static inline int netif_dormant(const struct net_device
*dev
)
816 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
820 static inline int netif_oper_up(const struct net_device
*dev
) {
821 return (dev
->operstate
== IF_OPER_UP
||
822 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
826 static inline int netif_device_present(struct net_device
*dev
)
828 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
831 extern void netif_device_detach(struct net_device
*dev
);
833 extern void netif_device_attach(struct net_device
*dev
);
836 * Network interface message level settings
838 #define HAVE_NETIF_MSG 1
841 NETIF_MSG_DRV
= 0x0001,
842 NETIF_MSG_PROBE
= 0x0002,
843 NETIF_MSG_LINK
= 0x0004,
844 NETIF_MSG_TIMER
= 0x0008,
845 NETIF_MSG_IFDOWN
= 0x0010,
846 NETIF_MSG_IFUP
= 0x0020,
847 NETIF_MSG_RX_ERR
= 0x0040,
848 NETIF_MSG_TX_ERR
= 0x0080,
849 NETIF_MSG_TX_QUEUED
= 0x0100,
850 NETIF_MSG_INTR
= 0x0200,
851 NETIF_MSG_TX_DONE
= 0x0400,
852 NETIF_MSG_RX_STATUS
= 0x0800,
853 NETIF_MSG_PKTDATA
= 0x1000,
854 NETIF_MSG_HW
= 0x2000,
855 NETIF_MSG_WOL
= 0x4000,
858 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
859 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
860 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
861 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
862 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
863 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
864 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
865 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
866 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
867 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
868 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
869 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
870 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
871 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
872 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
874 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
877 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
878 return default_msg_enable_bits
;
879 if (debug_value
== 0) /* no output */
882 return (1 << debug_value
) - 1;
885 /* Test if receive needs to be scheduled */
886 static inline int __netif_rx_schedule_prep(struct net_device
*dev
)
888 return !test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
891 /* Test if receive needs to be scheduled but only if up */
892 static inline int netif_rx_schedule_prep(struct net_device
*dev
)
894 return netif_running(dev
) && __netif_rx_schedule_prep(dev
);
897 /* Add interface to tail of rx poll list. This assumes that _prep has
898 * already been called and returned 1.
901 extern void __netif_rx_schedule(struct net_device
*dev
);
903 /* Try to reschedule poll. Called by irq handler. */
905 static inline void netif_rx_schedule(struct net_device
*dev
)
907 if (netif_rx_schedule_prep(dev
))
908 __netif_rx_schedule(dev
);
911 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
912 * Do not inline this?
914 static inline int netif_rx_reschedule(struct net_device
*dev
, int undo
)
916 if (netif_rx_schedule_prep(dev
)) {
921 local_irq_save(flags
);
922 list_add_tail(&dev
->poll_list
, &__get_cpu_var(softnet_data
).poll_list
);
923 __raise_softirq_irqoff(NET_RX_SOFTIRQ
);
924 local_irq_restore(flags
);
930 /* same as netif_rx_complete, except that local_irq_save(flags)
931 * has already been issued
933 static inline void __netif_rx_complete(struct net_device
*dev
)
935 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED
, &dev
->state
));
936 list_del(&dev
->poll_list
);
937 smp_mb__before_clear_bit();
938 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
941 /* Remove interface from poll list: it must be in the poll list
942 * on current cpu. This primitive is called by dev->poll(), when
943 * it completes the work. The device cannot be out of poll list at this
944 * moment, it is BUG().
946 static inline void netif_rx_complete(struct net_device
*dev
)
950 local_irq_save(flags
);
951 __netif_rx_complete(dev
);
952 local_irq_restore(flags
);
955 static inline void netif_poll_disable(struct net_device
*dev
)
957 while (test_and_set_bit(__LINK_STATE_RX_SCHED
, &dev
->state
))
959 schedule_timeout_interruptible(1);
962 static inline void netif_poll_enable(struct net_device
*dev
)
964 smp_mb__before_clear_bit();
965 clear_bit(__LINK_STATE_RX_SCHED
, &dev
->state
);
968 static inline void netif_tx_lock(struct net_device
*dev
)
970 spin_lock(&dev
->_xmit_lock
);
971 dev
->xmit_lock_owner
= smp_processor_id();
974 static inline void netif_tx_lock_bh(struct net_device
*dev
)
976 spin_lock_bh(&dev
->_xmit_lock
);
977 dev
->xmit_lock_owner
= smp_processor_id();
980 static inline int netif_tx_trylock(struct net_device
*dev
)
982 int ok
= spin_trylock(&dev
->_xmit_lock
);
984 dev
->xmit_lock_owner
= smp_processor_id();
988 static inline void netif_tx_unlock(struct net_device
*dev
)
990 dev
->xmit_lock_owner
= -1;
991 spin_unlock(&dev
->_xmit_lock
);
994 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
996 dev
->xmit_lock_owner
= -1;
997 spin_unlock_bh(&dev
->_xmit_lock
);
1000 static inline void netif_tx_disable(struct net_device
*dev
)
1002 netif_tx_lock_bh(dev
);
1003 netif_stop_queue(dev
);
1004 netif_tx_unlock_bh(dev
);
1007 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1009 extern void ether_setup(struct net_device
*dev
);
1011 /* Support for loadable net-drivers */
1012 extern struct net_device
*alloc_netdev(int sizeof_priv
, const char *name
,
1013 void (*setup
)(struct net_device
*));
1014 extern int register_netdev(struct net_device
*dev
);
1015 extern void unregister_netdev(struct net_device
*dev
);
1016 /* Functions used for secondary unicast and multicast support */
1017 extern void dev_set_rx_mode(struct net_device
*dev
);
1018 extern void __dev_set_rx_mode(struct net_device
*dev
);
1019 extern int dev_unicast_delete(struct net_device
*dev
, void *addr
, int alen
);
1020 extern int dev_unicast_add(struct net_device
*dev
, void *addr
, int alen
);
1021 extern int dev_mc_delete(struct net_device
*dev
, void *addr
, int alen
, int all
);
1022 extern int dev_mc_add(struct net_device
*dev
, void *addr
, int alen
, int newonly
);
1023 extern void dev_mc_discard(struct net_device
*dev
);
1024 extern int __dev_addr_delete(struct dev_addr_list
**list
, void *addr
, int alen
, int all
);
1025 extern int __dev_addr_add(struct dev_addr_list
**list
, void *addr
, int alen
, int newonly
);
1026 extern void __dev_addr_discard(struct dev_addr_list
**list
);
1027 extern void dev_set_promiscuity(struct net_device
*dev
, int inc
);
1028 extern void dev_set_allmulti(struct net_device
*dev
, int inc
);
1029 extern void netdev_state_change(struct net_device
*dev
);
1030 extern void netdev_features_change(struct net_device
*dev
);
1031 /* Load a device via the kmod */
1032 extern void dev_load(const char *name
);
1033 extern void dev_mcast_init(void);
1034 extern int netdev_max_backlog
;
1035 extern int weight_p
;
1036 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
1037 extern int skb_checksum_help(struct sk_buff
*skb
);
1038 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
1040 extern void netdev_rx_csum_fault(struct net_device
*dev
);
1042 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
1046 /* rx skb timestamps */
1047 extern void net_enable_timestamp(void);
1048 extern void net_disable_timestamp(void);
1050 #ifdef CONFIG_PROC_FS
1051 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
1052 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
1053 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
1056 extern void linkwatch_run_queue(void);
1058 static inline int net_gso_ok(int features
, int gso_type
)
1060 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
1061 return (features
& feature
) == feature
;
1064 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
1066 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
);
1069 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
1071 return skb_is_gso(skb
) &&
1072 (!skb_gso_ok(skb
, dev
->features
) ||
1073 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
1076 /* On bonding slaves other than the currently active slave, suppress
1077 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1078 * ARP on active-backup slaves with arp_validate enabled.
1080 static inline int skb_bond_should_drop(struct sk_buff
*skb
)
1082 struct net_device
*dev
= skb
->dev
;
1083 struct net_device
*master
= dev
->master
;
1086 (dev
->priv_flags
& IFF_SLAVE_INACTIVE
)) {
1087 if ((dev
->priv_flags
& IFF_SLAVE_NEEDARP
) &&
1088 skb
->protocol
== __constant_htons(ETH_P_ARP
))
1091 if (master
->priv_flags
& IFF_MASTER_ALB
) {
1092 if (skb
->pkt_type
!= PACKET_BROADCAST
&&
1093 skb
->pkt_type
!= PACKET_MULTICAST
)
1096 if (master
->priv_flags
& IFF_MASTER_8023AD
&&
1097 skb
->protocol
== __constant_htons(ETH_P_SLOW
))
1105 #endif /* __KERNEL__ */
1107 #endif /* _LINUX_DEV_H */