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>
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 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
71 * indicates that the device will soon be dropping packets, or already drops
72 * some packets of the same priority; prompting us to send less aggressively. */
73 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
74 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
78 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
80 /* Driver transmit return codes */
81 #define NETDEV_TX_OK 0 /* driver took care of packet */
82 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
83 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
86 * Compute the worst case header length according to the protocols
90 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
91 #define LL_MAX_HEADER 32
93 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
94 #define LL_MAX_HEADER 96
96 #define LL_MAX_HEADER 48
100 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
101 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
102 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
103 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
104 #define MAX_HEADER LL_MAX_HEADER
106 #define MAX_HEADER (LL_MAX_HEADER + 48)
110 * Network device statistics. Akin to the 2.0 ether stats but
111 * with byte counters.
114 struct net_device_stats
116 unsigned long rx_packets; /* total packets received */
117 unsigned long tx_packets; /* total packets transmitted */
118 unsigned long rx_bytes; /* total bytes received */
119 unsigned long tx_bytes; /* total bytes transmitted */
120 unsigned long rx_errors; /* bad packets received */
121 unsigned long tx_errors; /* packet transmit problems */
122 unsigned long rx_dropped; /* no space in linux buffers */
123 unsigned long tx_dropped; /* no space available in linux */
124 unsigned long multicast; /* multicast packets received */
125 unsigned long collisions;
127 /* detailed rx_errors: */
128 unsigned long rx_length_errors;
129 unsigned long rx_over_errors; /* receiver ring buff overflow */
130 unsigned long rx_crc_errors; /* recved pkt with crc error */
131 unsigned long rx_frame_errors; /* recv'd frame alignment error */
132 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
133 unsigned long rx_missed_errors; /* receiver missed packet */
135 /* detailed tx_errors */
136 unsigned long tx_aborted_errors;
137 unsigned long tx_carrier_errors;
138 unsigned long tx_fifo_errors;
139 unsigned long tx_heartbeat_errors;
140 unsigned long tx_window_errors;
143 unsigned long rx_compressed;
144 unsigned long tx_compressed;
148 /* Media selection options. */
161 #include <linux/cache.h>
162 #include <linux/skbuff.h>
168 struct netif_rx_stats
172 unsigned time_squeeze;
173 unsigned cpu_collision;
176 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
180 * We tag multicasts with these structures.
185 struct dev_mc_list *next;
186 __u8 dmi_addr[MAX_ADDR_LEN];
187 unsigned char dmi_addrlen;
194 struct hh_cache *hh_next; /* Next entry */
195 atomic_t hh_refcnt; /* number of users */
197 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
199 * They are mostly read, but hh_refcnt may be changed quite frequently,
200 * incurring cache line ping pongs.
202 __be16 hh_type ____cacheline_aligned_in_smp;
203 /* protocol identifier, f.e ETH_P_IP
204 * NOTE: For VLANs, this will be the
205 * encapuslated type. --BLG
207 u16 hh_len; /* length of header */
208 int (*hh_output)(struct sk_buff *skb);
211 /* cached hardware header; allow for machine alignment needs. */
212 #define HH_DATA_MOD 16
213 #define HH_DATA_OFF(__len) \
214 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
215 #define HH_DATA_ALIGN(__len) \
216 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
217 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
220 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
222 * dev->hard_header_len ? (dev->hard_header_len +
223 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
225 * We could use other alignment values, but we must maintain the
226 * relationship HH alignment <= LL alignment.
228 #define LL_RESERVED_SPACE(dev) \
229 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
230 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
231 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
233 /* These flag bits are private to the generic network queueing
234 * layer, they may not be explicitly referenced by any other
242 __LINK_STATE_PRESENT,
244 __LINK_STATE_NOCARRIER,
245 __LINK_STATE_RX_SCHED,
246 __LINK_STATE_LINKWATCH_PENDING,
247 __LINK_STATE_DORMANT,
248 __LINK_STATE_QDISC_RUNNING,
253 * This structure holds at boot time configured netdevice settings. They
254 * are then used in the device probing.
256 struct netdev_boot_setup {
260 #define NETDEV_BOOT_SETUP_MAX 8
262 extern int __init netdev_boot_setup(char *str);
265 * The DEVICE structure.
266 * Actually, this whole structure is a big mistake. It mixes I/O
267 * data with strictly "high-level" data, and it has to know about
268 * almost every data structure used in the INET module.
270 * FIXME: cleanup struct net_device such that network protocol info
278 * This is the first field of the "visible" part of this structure
279 * (i.e. as seen by users in the "Space.c" file). It is the name
283 /* device name hash chain */
284 struct hlist_node name_hlist;
287 * I/O specific fields
288 * FIXME: Merge these and struct ifmap into one
290 unsigned long mem_end; /* shared mem end */
291 unsigned long mem_start; /* shared mem start */
292 unsigned long base_addr; /* device I/O address */
293 unsigned int irq; /* device IRQ number */
296 * Some hardware also needs these fields, but they are not
297 * part of the usual set specified in Space.c.
300 unsigned char if_port; /* Selectable AUI, TP,..*/
301 unsigned char dma; /* DMA channel */
305 struct net_device *next;
307 /* The device initialization function. Called only once. */
308 int (*init)(struct net_device *dev);
310 /* ------- Fields preinitialized in Space.c finish here ------- */
312 /* Net device features */
313 unsigned long features;
314 #define NETIF_F_SG 1 /* Scatter/gather IO. */
315 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
316 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
317 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
318 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
319 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
320 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
321 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
322 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
323 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
324 #define NETIF_F_GSO 2048 /* Enable software GSO. */
325 #define NETIF_F_LLTX 4096 /* LockLess TX */
327 /* Segmentation offload features */
328 #define NETIF_F_GSO_SHIFT 16
329 #define NETIF_F_GSO_MASK 0xffff0000
330 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
331 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
332 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
333 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
334 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
336 /* List of features with software fallbacks. */
337 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
339 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
340 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
342 struct net_device *next_sched;
344 /* Interface index. Unique device identifier */
349 struct net_device_stats* (*get_stats)(struct net_device *dev);
351 /* List of functions to handle Wireless Extensions (instead of ioctl).
352 * See <net/iw_handler.h> for details. Jean II */
353 const struct iw_handler_def * wireless_handlers;
354 /* Instance data managed by the core of Wireless Extensions. */
355 struct iw_public_data * wireless_data;
357 const struct ethtool_ops *ethtool_ops;
360 * This marks the end of the "visible" part of the structure. All
361 * fields hereafter are internal to the system, and may change at
362 * will (read: may be cleaned up at will).
366 unsigned int flags; /* interface flags (a la BSD) */
367 unsigned short gflags;
368 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
369 unsigned short padded; /* How much padding added by alloc_netdev() */
371 unsigned char operstate; /* RFC2863 operstate */
372 unsigned char link_mode; /* mapping policy to operstate */
374 unsigned mtu; /* interface MTU value */
375 unsigned short type; /* interface hardware type */
376 unsigned short hard_header_len; /* hardware hdr length */
378 struct net_device *master; /* Pointer to master device of a group,
379 * which this device is member of.
382 /* Interface address info. */
383 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
384 unsigned char addr_len; /* hardware address length */
385 unsigned short dev_id; /* for shared network cards */
387 struct dev_mc_list *mc_list; /* Multicast mac addresses */
388 int mc_count; /* Number of installed mcasts */
393 /* Protocol specific pointers */
395 void *atalk_ptr; /* AppleTalk link */
396 void *ip_ptr; /* IPv4 specific data */
397 void *dn_ptr; /* DECnet specific data */
398 void *ip6_ptr; /* IPv6 specific data */
399 void *ec_ptr; /* Econet specific data */
400 void *ax25_ptr; /* AX.25 specific data */
403 * Cache line mostly used on receive path (including eth_type_trans())
405 struct list_head poll_list ____cacheline_aligned_in_smp;
406 /* Link to poll list */
408 int (*poll) (struct net_device *dev, int *quota);
411 unsigned long last_rx; /* Time of last Rx */
412 /* Interface address info used in eth_type_trans() */
413 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
414 because most packets are unicast) */
416 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
419 * Cache line mostly used on queue transmit path (qdisc)
421 /* device queue lock */
422 spinlock_t queue_lock ____cacheline_aligned_in_smp;
424 struct Qdisc *qdisc_sleeping;
425 struct list_head qdisc_list;
426 unsigned long tx_queue_len; /* Max frames per queue allowed */
428 /* Partially transmitted GSO packet. */
429 struct sk_buff *gso_skb;
431 /* ingress path synchronizer */
432 spinlock_t ingress_lock;
433 struct Qdisc *qdisc_ingress;
436 * One part is mostly used on xmit path (device)
438 /* hard_start_xmit synchronizer */
439 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
440 /* cpu id of processor entered to hard_start_xmit or -1,
441 if nobody entered there.
444 void *priv; /* pointer to private data */
445 int (*hard_start_xmit) (struct sk_buff *skb,
446 struct net_device *dev);
447 /* These may be needed for future network-power-down code. */
448 unsigned long trans_start; /* Time (in jiffies) of last Tx */
450 int watchdog_timeo; /* used by dev_watchdog() */
451 struct timer_list watchdog_timer;
454 * refcnt is a very hot point, so align it on SMP
456 /* Number of references to this device */
457 atomic_t refcnt ____cacheline_aligned_in_smp;
459 /* delayed register/unregister */
460 struct list_head todo_list;
461 /* device index hash chain */
462 struct hlist_node index_hlist;
464 /* register/unregister state machine */
465 enum { NETREG_UNINITIALIZED=0,
466 NETREG_REGISTERED, /* completed register_netdevice */
467 NETREG_UNREGISTERING, /* called unregister_netdevice */
468 NETREG_UNREGISTERED, /* completed unregister todo */
469 NETREG_RELEASED, /* called free_netdev */
472 /* Called after device is detached from network. */
473 void (*uninit)(struct net_device *dev);
474 /* Called after last user reference disappears. */
475 void (*destructor)(struct net_device *dev);
477 /* Pointers to interface service routines. */
478 int (*open)(struct net_device *dev);
479 int (*stop)(struct net_device *dev);
480 #define HAVE_NETDEV_POLL
481 int (*hard_header) (struct sk_buff *skb,
482 struct net_device *dev,
487 int (*rebuild_header)(struct sk_buff *skb);
488 #define HAVE_MULTICAST
489 void (*set_multicast_list)(struct net_device *dev);
490 #define HAVE_SET_MAC_ADDR
491 int (*set_mac_address)(struct net_device *dev,
493 #define HAVE_PRIVATE_IOCTL
494 int (*do_ioctl)(struct net_device *dev,
495 struct ifreq *ifr, int cmd);
496 #define HAVE_SET_CONFIG
497 int (*set_config)(struct net_device *dev,
499 #define HAVE_HEADER_CACHE
500 int (*hard_header_cache)(struct neighbour *neigh,
501 struct hh_cache *hh);
502 void (*header_cache_update)(struct hh_cache *hh,
503 struct net_device *dev,
504 unsigned char * haddr);
505 #define HAVE_CHANGE_MTU
506 int (*change_mtu)(struct net_device *dev, int new_mtu);
508 #define HAVE_TX_TIMEOUT
509 void (*tx_timeout) (struct net_device *dev);
511 void (*vlan_rx_register)(struct net_device *dev,
512 struct vlan_group *grp);
513 void (*vlan_rx_add_vid)(struct net_device *dev,
515 void (*vlan_rx_kill_vid)(struct net_device *dev,
518 int (*hard_header_parse)(struct sk_buff *skb,
519 unsigned char *haddr);
520 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
521 #ifdef CONFIG_NETPOLL
522 struct netpoll_info *npinfo;
524 #ifdef CONFIG_NET_POLL_CONTROLLER
525 void (*poll_controller)(struct net_device *dev);
529 struct net_bridge_port *br_port;
531 /* class/net/name entry */
532 struct class_device class_dev;
533 /* space for optional statistics and wireless sysfs groups */
534 struct attribute_group *sysfs_groups[3];
537 #define NETDEV_ALIGN 32
538 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
540 static inline void *netdev_priv(struct net_device *dev)
542 return (char *)dev + ((sizeof(struct net_device)
543 + NETDEV_ALIGN_CONST)
544 & ~NETDEV_ALIGN_CONST);
547 #define SET_MODULE_OWNER(dev) do { } while (0)
548 /* Set the sysfs physical device reference for the network logical device
549 * if set prior to registration will cause a symlink during initialization.
551 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
554 __be16 type; /* This is really htons(ether_type). */
555 struct net_device *dev; /* NULL is wildcarded here */
556 int (*func) (struct sk_buff *,
558 struct packet_type *,
559 struct net_device *);
560 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
562 int (*gso_send_check)(struct sk_buff *skb);
563 void *af_packet_priv;
564 struct list_head list;
567 #include <linux/interrupt.h>
568 #include <linux/notifier.h>
570 extern struct net_device loopback_dev; /* The loopback */
571 extern struct net_device *dev_base; /* All devices */
572 extern rwlock_t dev_base_lock; /* Device list lock */
574 extern int netdev_boot_setup_check(struct net_device *dev);
575 extern unsigned long netdev_boot_base(const char *prefix, int unit);
576 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
577 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
578 extern void dev_add_pack(struct packet_type *pt);
579 extern void dev_remove_pack(struct packet_type *pt);
580 extern void __dev_remove_pack(struct packet_type *pt);
582 extern struct net_device *dev_get_by_flags(unsigned short flags,
583 unsigned short mask);
584 extern struct net_device *dev_get_by_name(const char *name);
585 extern struct net_device *__dev_get_by_name(const char *name);
586 extern int dev_alloc_name(struct net_device *dev, const char *name);
587 extern int dev_open(struct net_device *dev);
588 extern int dev_close(struct net_device *dev);
589 extern int dev_queue_xmit(struct sk_buff *skb);
590 extern int register_netdevice(struct net_device *dev);
591 extern int unregister_netdevice(struct net_device *dev);
592 extern void free_netdev(struct net_device *dev);
593 extern void synchronize_net(void);
594 extern int register_netdevice_notifier(struct notifier_block *nb);
595 extern int unregister_netdevice_notifier(struct notifier_block *nb);
596 extern int call_netdevice_notifiers(unsigned long val, void *v);
597 extern struct net_device *dev_get_by_index(int ifindex);
598 extern struct net_device *__dev_get_by_index(int ifindex);
599 extern int dev_restart(struct net_device *dev);
600 #ifdef CONFIG_NETPOLL_TRAP
601 extern int netpoll_trap(void);
604 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
605 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
606 static inline int unregister_gifconf(unsigned int family)
608 return register_gifconf(family, NULL);
612 * Incoming packets are placed on per-cpu queues so that
613 * no locking is needed.
618 struct net_device *output_queue;
619 struct sk_buff_head input_pkt_queue;
620 struct list_head poll_list;
621 struct sk_buff *completion_queue;
623 struct net_device backlog_dev; /* Sorry. 8) */
624 #ifdef CONFIG_NET_DMA
625 struct dma_chan *net_dma;
629 DECLARE_PER_CPU(struct softnet_data,softnet_data);
631 #define HAVE_NETIF_QUEUE
633 extern void __netif_schedule(struct net_device *dev);
635 static inline void netif_schedule(struct net_device *dev)
637 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
638 __netif_schedule(dev);
641 static inline void netif_start_queue(struct net_device *dev)
643 clear_bit(__LINK_STATE_XOFF, &dev->state);
646 static inline void netif_wake_queue(struct net_device *dev)
648 #ifdef CONFIG_NETPOLL_TRAP
652 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
653 __netif_schedule(dev);
656 static inline void netif_stop_queue(struct net_device *dev)
658 #ifdef CONFIG_NETPOLL_TRAP
662 set_bit(__LINK_STATE_XOFF, &dev->state);
665 static inline int netif_queue_stopped(const struct net_device *dev)
667 return test_bit(__LINK_STATE_XOFF, &dev->state);
670 static inline int netif_running(const struct net_device *dev)
672 return test_bit(__LINK_STATE_START, &dev->state);
676 /* Use this variant when it is known for sure that it
677 * is executing from interrupt context.
679 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
681 if (atomic_dec_and_test(&skb->users)) {
682 struct softnet_data *sd;
685 local_irq_save(flags);
686 sd = &__get_cpu_var(softnet_data);
687 skb->next = sd->completion_queue;
688 sd->completion_queue = skb;
689 raise_softirq_irqoff(NET_TX_SOFTIRQ);
690 local_irq_restore(flags);
694 /* Use this variant in places where it could be invoked
695 * either from interrupt or non-interrupt context.
697 extern void dev_kfree_skb_any(struct sk_buff *skb);
699 #define HAVE_NETIF_RX 1
700 extern int netif_rx(struct sk_buff *skb);
701 extern int netif_rx_ni(struct sk_buff *skb);
702 #define HAVE_NETIF_RECEIVE_SKB 1
703 extern int netif_receive_skb(struct sk_buff *skb);
704 extern int dev_valid_name(const char *name);
705 extern int dev_ioctl(unsigned int cmd, void __user *);
706 extern int dev_ethtool(struct ifreq *);
707 extern unsigned dev_get_flags(const struct net_device *);
708 extern int dev_change_flags(struct net_device *, unsigned);
709 extern int dev_change_name(struct net_device *, char *);
710 extern int dev_set_mtu(struct net_device *, int);
711 extern int dev_set_mac_address(struct net_device *,
713 extern int dev_hard_start_xmit(struct sk_buff *skb,
714 struct net_device *dev);
716 extern void dev_init(void);
718 extern int netdev_budget;
720 /* Called by rtnetlink.c:rtnl_unlock() */
721 extern void netdev_run_todo(void);
723 static inline void dev_put(struct net_device *dev)
725 atomic_dec(&dev->refcnt);
728 static inline void dev_hold(struct net_device *dev)
730 atomic_inc(&dev->refcnt);
733 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
734 * and _off may be called from IRQ context, but it is caller
735 * who is responsible for serialization of these calls.
737 * The name carrier is inappropriate, these functions should really be
738 * called netif_lowerlayer_*() because they represent the state of any
739 * kind of lower layer not just hardware media.
742 extern void linkwatch_fire_event(struct net_device *dev);
744 static inline int netif_carrier_ok(const struct net_device *dev)
746 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
749 extern void __netdev_watchdog_up(struct net_device *dev);
751 extern void netif_carrier_on(struct net_device *dev);
753 extern void netif_carrier_off(struct net_device *dev);
755 static inline void netif_dormant_on(struct net_device *dev)
757 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
758 linkwatch_fire_event(dev);
761 static inline void netif_dormant_off(struct net_device *dev)
763 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
764 linkwatch_fire_event(dev);
767 static inline int netif_dormant(const struct net_device *dev)
769 return test_bit(__LINK_STATE_DORMANT, &dev->state);
773 static inline int netif_oper_up(const struct net_device *dev) {
774 return (dev->operstate == IF_OPER_UP ||
775 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
779 static inline int netif_device_present(struct net_device *dev)
781 return test_bit(__LINK_STATE_PRESENT, &dev->state);
784 extern void netif_device_detach(struct net_device *dev);
786 extern void netif_device_attach(struct net_device *dev);
789 * Network interface message level settings
791 #define HAVE_NETIF_MSG 1
794 NETIF_MSG_DRV = 0x0001,
795 NETIF_MSG_PROBE = 0x0002,
796 NETIF_MSG_LINK = 0x0004,
797 NETIF_MSG_TIMER = 0x0008,
798 NETIF_MSG_IFDOWN = 0x0010,
799 NETIF_MSG_IFUP = 0x0020,
800 NETIF_MSG_RX_ERR = 0x0040,
801 NETIF_MSG_TX_ERR = 0x0080,
802 NETIF_MSG_TX_QUEUED = 0x0100,
803 NETIF_MSG_INTR = 0x0200,
804 NETIF_MSG_TX_DONE = 0x0400,
805 NETIF_MSG_RX_STATUS = 0x0800,
806 NETIF_MSG_PKTDATA = 0x1000,
807 NETIF_MSG_HW = 0x2000,
808 NETIF_MSG_WOL = 0x4000,
811 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
812 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
813 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
814 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
815 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
816 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
817 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
818 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
819 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
820 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
821 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
822 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
823 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
824 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
825 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
827 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
830 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
831 return default_msg_enable_bits;
832 if (debug_value == 0) /* no output */
835 return (1 << debug_value) - 1;
838 /* Test if receive needs to be scheduled */
839 static inline int __netif_rx_schedule_prep(struct net_device *dev)
841 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
844 /* Test if receive needs to be scheduled but only if up */
845 static inline int netif_rx_schedule_prep(struct net_device *dev)
847 return netif_running(dev) && __netif_rx_schedule_prep(dev);
850 /* Add interface to tail of rx poll list. This assumes that _prep has
851 * already been called and returned 1.
854 extern void __netif_rx_schedule(struct net_device *dev);
856 /* Try to reschedule poll. Called by irq handler. */
858 static inline void netif_rx_schedule(struct net_device *dev)
860 if (netif_rx_schedule_prep(dev))
861 __netif_rx_schedule(dev);
864 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
865 * Do not inline this?
867 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
869 if (netif_rx_schedule_prep(dev)) {
874 local_irq_save(flags);
875 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
876 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
877 local_irq_restore(flags);
883 /* Remove interface from poll list: it must be in the poll list
884 * on current cpu. This primitive is called by dev->poll(), when
885 * it completes the work. The device cannot be out of poll list at this
886 * moment, it is BUG().
888 static inline void netif_rx_complete(struct net_device *dev)
892 local_irq_save(flags);
893 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
894 list_del(&dev->poll_list);
895 smp_mb__before_clear_bit();
896 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
897 local_irq_restore(flags);
900 static inline void netif_poll_disable(struct net_device *dev)
902 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
904 schedule_timeout_interruptible(1);
907 static inline void netif_poll_enable(struct net_device *dev)
909 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
912 /* same as netif_rx_complete, except that local_irq_save(flags)
913 * has already been issued
915 static inline void __netif_rx_complete(struct net_device *dev)
917 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
918 list_del(&dev->poll_list);
919 smp_mb__before_clear_bit();
920 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
923 static inline void netif_tx_lock(struct net_device *dev)
925 spin_lock(&dev->_xmit_lock);
926 dev->xmit_lock_owner = smp_processor_id();
929 static inline void netif_tx_lock_bh(struct net_device *dev)
931 spin_lock_bh(&dev->_xmit_lock);
932 dev->xmit_lock_owner = smp_processor_id();
935 static inline int netif_tx_trylock(struct net_device *dev)
937 int ok = spin_trylock(&dev->_xmit_lock);
939 dev->xmit_lock_owner = smp_processor_id();
943 static inline void netif_tx_unlock(struct net_device *dev)
945 dev->xmit_lock_owner = -1;
946 spin_unlock(&dev->_xmit_lock);
949 static inline void netif_tx_unlock_bh(struct net_device *dev)
951 dev->xmit_lock_owner = -1;
952 spin_unlock_bh(&dev->_xmit_lock);
955 static inline void netif_tx_disable(struct net_device *dev)
957 netif_tx_lock_bh(dev);
958 netif_stop_queue(dev);
959 netif_tx_unlock_bh(dev);
962 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
964 extern void ether_setup(struct net_device *dev);
966 /* Support for loadable net-drivers */
967 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
968 void (*setup)(struct net_device *));
969 extern int register_netdev(struct net_device *dev);
970 extern void unregister_netdev(struct net_device *dev);
971 /* Functions used for multicast support */
972 extern void dev_mc_upload(struct net_device *dev);
973 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
974 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
975 extern void dev_mc_discard(struct net_device *dev);
976 extern void dev_set_promiscuity(struct net_device *dev, int inc);
977 extern void dev_set_allmulti(struct net_device *dev, int inc);
978 extern void netdev_state_change(struct net_device *dev);
979 extern void netdev_features_change(struct net_device *dev);
980 /* Load a device via the kmod */
981 extern void dev_load(const char *name);
982 extern void dev_mcast_init(void);
983 extern int netdev_max_backlog;
985 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
986 extern int skb_checksum_help(struct sk_buff *skb);
987 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
989 extern void netdev_rx_csum_fault(struct net_device *dev);
991 static inline void netdev_rx_csum_fault(struct net_device *dev)
995 /* rx skb timestamps */
996 extern void net_enable_timestamp(void);
997 extern void net_disable_timestamp(void);
999 #ifdef CONFIG_PROC_FS
1000 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1001 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1002 extern void dev_seq_stop(struct seq_file *seq, void *v);
1005 extern void linkwatch_run_queue(void);
1007 static inline int net_gso_ok(int features, int gso_type)
1009 int feature = gso_type << NETIF_F_GSO_SHIFT;
1010 return (features & feature) == feature;
1013 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1015 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1018 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1020 return skb_is_gso(skb) &&
1021 (!skb_gso_ok(skb, dev->features) ||
1022 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1025 /* On bonding slaves other than the currently active slave, suppress
1026 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1027 * ARP on active-backup slaves with arp_validate enabled.
1029 static inline int skb_bond_should_drop(struct sk_buff *skb)
1031 struct net_device *dev = skb->dev;
1032 struct net_device *master = dev->master;
1035 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1036 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1037 skb->protocol == __constant_htons(ETH_P_ARP))
1040 if (master->priv_flags & IFF_MASTER_ALB) {
1041 if (skb->pkt_type != PACKET_BROADCAST &&
1042 skb->pkt_type != PACKET_MULTICAST)
1045 if (master->priv_flags & IFF_MASTER_8023AD &&
1046 skb->protocol == __constant_htons(ETH_P_SLOW))
1054 #endif /* __KERNEL__ */
1056 #endif /* _LINUX_DEV_H */