2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <Alan.Cox@linux.org>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
33 #include <asm/atomic.h>
34 #include <asm/cache.h>
35 #include <asm/byteorder.h>
37 #include <linux/device.h>
38 #include <linux/percpu.h>
39 #include <linux/dmaengine.h>
45 /* source back-compat hooks */
46 #define SET_ETHTOOL_OPS(netdev,ops) \
47 ( (netdev)->ethtool_ops = (ops) )
49 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
50 functions are available. */
51 #define HAVE_FREE_NETDEV /* free_netdev() */
52 #define HAVE_NETDEV_PRIV /* netdev_priv() */
54 #define NET_XMIT_SUCCESS 0
55 #define NET_XMIT_DROP 1 /* skb dropped */
56 #define NET_XMIT_CN 2 /* congestion notification */
57 #define NET_XMIT_POLICED 3 /* skb is shot by police */
58 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
59 (TC use only - dev_queue_xmit
60 returns this as NET_XMIT_SUCCESS) */
62 /* Backlog congestion levels */
63 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
64 #define NET_RX_DROP 1 /* packet dropped */
65 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
66 #define NET_RX_CN_MOD 3 /* Storm on its way! */
67 #define NET_RX_CN_HIGH 4 /* The storm is here */
68 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
70 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
74 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
76 /* Driver transmit return codes */
77 #define NETDEV_TX_OK 0 /* driver took care of packet */
78 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
79 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
82 * Compute the worst case header length according to the protocols
86 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
87 #define LL_MAX_HEADER 32
89 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
90 #define LL_MAX_HEADER 96
92 #define LL_MAX_HEADER 48
96 #if !defined(CONFIG_NET_IPIP) && \
97 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
98 #define MAX_HEADER LL_MAX_HEADER
100 #define MAX_HEADER (LL_MAX_HEADER + 48)
104 * Network device statistics. Akin to the 2.0 ether stats but
105 * with byte counters.
108 struct net_device_stats
110 unsigned long rx_packets; /* total packets received */
111 unsigned long tx_packets; /* total packets transmitted */
112 unsigned long rx_bytes; /* total bytes received */
113 unsigned long tx_bytes; /* total bytes transmitted */
114 unsigned long rx_errors; /* bad packets received */
115 unsigned long tx_errors; /* packet transmit problems */
116 unsigned long rx_dropped; /* no space in linux buffers */
117 unsigned long tx_dropped; /* no space available in linux */
118 unsigned long multicast; /* multicast packets received */
119 unsigned long collisions;
121 /* detailed rx_errors: */
122 unsigned long rx_length_errors;
123 unsigned long rx_over_errors; /* receiver ring buff overflow */
124 unsigned long rx_crc_errors; /* recved pkt with crc error */
125 unsigned long rx_frame_errors; /* recv'd frame alignment error */
126 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
127 unsigned long rx_missed_errors; /* receiver missed packet */
129 /* detailed tx_errors */
130 unsigned long tx_aborted_errors;
131 unsigned long tx_carrier_errors;
132 unsigned long tx_fifo_errors;
133 unsigned long tx_heartbeat_errors;
134 unsigned long tx_window_errors;
137 unsigned long rx_compressed;
138 unsigned long tx_compressed;
142 /* Media selection options. */
155 #include <linux/cache.h>
156 #include <linux/skbuff.h>
162 struct netif_rx_stats
166 unsigned time_squeeze;
167 unsigned cpu_collision;
170 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
174 * We tag multicasts with these structures.
179 struct dev_mc_list *next;
180 __u8 dmi_addr[MAX_ADDR_LEN];
181 unsigned char dmi_addrlen;
188 struct hh_cache *hh_next; /* Next entry */
189 atomic_t hh_refcnt; /* number of users */
190 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
191 * NOTE: For VLANs, this will be the
192 * encapuslated type. --BLG
194 int hh_len; /* length of header */
195 int (*hh_output)(struct sk_buff *skb);
198 /* cached hardware header; allow for machine alignment needs. */
199 #define HH_DATA_MOD 16
200 #define HH_DATA_OFF(__len) \
201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
202 #define HH_DATA_ALIGN(__len) \
203 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
204 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
207 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
209 * dev->hard_header_len ? (dev->hard_header_len +
210 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
212 * We could use other alignment values, but we must maintain the
213 * relationship HH alignment <= LL alignment.
215 #define LL_RESERVED_SPACE(dev) \
216 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
217 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
218 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
220 /* These flag bits are private to the generic network queueing
221 * layer, they may not be explicitly referenced by any other
229 __LINK_STATE_PRESENT,
231 __LINK_STATE_NOCARRIER,
232 __LINK_STATE_RX_SCHED,
233 __LINK_STATE_LINKWATCH_PENDING,
234 __LINK_STATE_DORMANT,
239 * This structure holds at boot time configured netdevice settings. They
240 * are then used in the device probing.
242 struct netdev_boot_setup {
246 #define NETDEV_BOOT_SETUP_MAX 8
248 extern int __init netdev_boot_setup(char *str);
251 * The DEVICE structure.
252 * Actually, this whole structure is a big mistake. It mixes I/O
253 * data with strictly "high-level" data, and it has to know about
254 * almost every data structure used in the INET module.
256 * FIXME: cleanup struct net_device such that network protocol info
264 * This is the first field of the "visible" part of this structure
265 * (i.e. as seen by users in the "Space.c" file). It is the name
269 /* device name hash chain */
270 struct hlist_node name_hlist;
273 * I/O specific fields
274 * FIXME: Merge these and struct ifmap into one
276 unsigned long mem_end; /* shared mem end */
277 unsigned long mem_start; /* shared mem start */
278 unsigned long base_addr; /* device I/O address */
279 unsigned int irq; /* device IRQ number */
282 * Some hardware also needs these fields, but they are not
283 * part of the usual set specified in Space.c.
286 unsigned char if_port; /* Selectable AUI, TP,..*/
287 unsigned char dma; /* DMA channel */
291 struct net_device *next;
293 /* The device initialization function. Called only once. */
294 int (*init)(struct net_device *dev);
296 /* ------- Fields preinitialized in Space.c finish here ------- */
298 /* Net device features */
299 unsigned long features;
300 #define NETIF_F_SG 1 /* Scatter/gather IO. */
301 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
302 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
303 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
304 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
305 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
306 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
307 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
308 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
309 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
310 #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
311 #define NETIF_F_LLTX 4096 /* LockLess TX */
312 #define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/
314 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
315 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
317 struct net_device *next_sched;
319 /* Interface index. Unique device identifier */
324 struct net_device_stats* (*get_stats)(struct net_device *dev);
325 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
327 /* List of functions to handle Wireless Extensions (instead of ioctl).
328 * See <net/iw_handler.h> for details. Jean II */
329 const struct iw_handler_def * wireless_handlers;
330 /* Instance data managed by the core of Wireless Extensions. */
331 struct iw_public_data * wireless_data;
333 struct ethtool_ops *ethtool_ops;
336 * This marks the end of the "visible" part of the structure. All
337 * fields hereafter are internal to the system, and may change at
338 * will (read: may be cleaned up at will).
342 unsigned int flags; /* interface flags (a la BSD) */
343 unsigned short gflags;
344 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
345 unsigned short padded; /* How much padding added by alloc_netdev() */
347 unsigned char operstate; /* RFC2863 operstate */
348 unsigned char link_mode; /* mapping policy to operstate */
350 unsigned mtu; /* interface MTU value */
351 unsigned short type; /* interface hardware type */
352 unsigned short hard_header_len; /* hardware hdr length */
354 struct net_device *master; /* Pointer to master device of a group,
355 * which this device is member of.
358 /* Interface address info. */
359 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
360 unsigned char addr_len; /* hardware address length */
361 unsigned short dev_id; /* for shared network cards */
363 struct dev_mc_list *mc_list; /* Multicast mac addresses */
364 int mc_count; /* Number of installed mcasts */
369 /* Protocol specific pointers */
371 void *atalk_ptr; /* AppleTalk link */
372 void *ip_ptr; /* IPv4 specific data */
373 void *dn_ptr; /* DECnet specific data */
374 void *ip6_ptr; /* IPv6 specific data */
375 void *ec_ptr; /* Econet specific data */
376 void *ax25_ptr; /* AX.25 specific data */
379 * Cache line mostly used on receive path (including eth_type_trans())
381 struct list_head poll_list ____cacheline_aligned_in_smp;
382 /* Link to poll list */
384 int (*poll) (struct net_device *dev, int *quota);
387 unsigned long last_rx; /* Time of last Rx */
388 /* Interface address info used in eth_type_trans() */
389 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
390 because most packets are unicast) */
392 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
395 * Cache line mostly used on queue transmit path (qdisc)
397 /* device queue lock */
398 spinlock_t queue_lock ____cacheline_aligned_in_smp;
400 struct Qdisc *qdisc_sleeping;
401 struct list_head qdisc_list;
402 unsigned long tx_queue_len; /* Max frames per queue allowed */
404 /* ingress path synchronizer */
405 spinlock_t ingress_lock;
406 struct Qdisc *qdisc_ingress;
409 * One part is mostly used on xmit path (device)
411 /* hard_start_xmit synchronizer */
412 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
413 /* cpu id of processor entered to hard_start_xmit or -1,
414 if nobody entered there.
417 void *priv; /* pointer to private data */
418 int (*hard_start_xmit) (struct sk_buff *skb,
419 struct net_device *dev);
420 /* These may be needed for future network-power-down code. */
421 unsigned long trans_start; /* Time (in jiffies) of last Tx */
423 int watchdog_timeo; /* used by dev_watchdog() */
424 struct timer_list watchdog_timer;
427 * refcnt is a very hot point, so align it on SMP
429 /* Number of references to this device */
430 atomic_t refcnt ____cacheline_aligned_in_smp;
432 /* delayed register/unregister */
433 struct list_head todo_list;
434 /* device index hash chain */
435 struct hlist_node index_hlist;
437 /* register/unregister state machine */
438 enum { NETREG_UNINITIALIZED=0,
439 NETREG_REGISTERED, /* completed register_netdevice */
440 NETREG_UNREGISTERING, /* called unregister_netdevice */
441 NETREG_UNREGISTERED, /* completed unregister todo */
442 NETREG_RELEASED, /* called free_netdev */
445 /* Called after device is detached from network. */
446 void (*uninit)(struct net_device *dev);
447 /* Called after last user reference disappears. */
448 void (*destructor)(struct net_device *dev);
450 /* Pointers to interface service routines. */
451 int (*open)(struct net_device *dev);
452 int (*stop)(struct net_device *dev);
453 #define HAVE_NETDEV_POLL
454 int (*hard_header) (struct sk_buff *skb,
455 struct net_device *dev,
460 int (*rebuild_header)(struct sk_buff *skb);
461 #define HAVE_MULTICAST
462 void (*set_multicast_list)(struct net_device *dev);
463 #define HAVE_SET_MAC_ADDR
464 int (*set_mac_address)(struct net_device *dev,
466 #define HAVE_PRIVATE_IOCTL
467 int (*do_ioctl)(struct net_device *dev,
468 struct ifreq *ifr, int cmd);
469 #define HAVE_SET_CONFIG
470 int (*set_config)(struct net_device *dev,
472 #define HAVE_HEADER_CACHE
473 int (*hard_header_cache)(struct neighbour *neigh,
474 struct hh_cache *hh);
475 void (*header_cache_update)(struct hh_cache *hh,
476 struct net_device *dev,
477 unsigned char * haddr);
478 #define HAVE_CHANGE_MTU
479 int (*change_mtu)(struct net_device *dev, int new_mtu);
481 #define HAVE_TX_TIMEOUT
482 void (*tx_timeout) (struct net_device *dev);
484 void (*vlan_rx_register)(struct net_device *dev,
485 struct vlan_group *grp);
486 void (*vlan_rx_add_vid)(struct net_device *dev,
488 void (*vlan_rx_kill_vid)(struct net_device *dev,
491 int (*hard_header_parse)(struct sk_buff *skb,
492 unsigned char *haddr);
493 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
494 #ifdef CONFIG_NETPOLL
495 struct netpoll_info *npinfo;
497 #ifdef CONFIG_NET_POLL_CONTROLLER
498 void (*poll_controller)(struct net_device *dev);
502 struct net_bridge_port *br_port;
504 #ifdef CONFIG_NET_DIVERT
505 /* this will get initialized at each interface type init routine */
506 struct divert_blk *divert;
507 #endif /* CONFIG_NET_DIVERT */
509 /* class/net/name entry */
510 struct class_device class_dev;
511 /* space for optional statistics and wireless sysfs groups */
512 struct attribute_group *sysfs_groups[3];
515 #define NETDEV_ALIGN 32
516 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
518 static inline void *netdev_priv(struct net_device *dev)
520 return (char *)dev + ((sizeof(struct net_device)
521 + NETDEV_ALIGN_CONST)
522 & ~NETDEV_ALIGN_CONST);
525 #define SET_MODULE_OWNER(dev) do { } while (0)
526 /* Set the sysfs physical device reference for the network logical device
527 * if set prior to registration will cause a symlink during initialization.
529 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
532 __be16 type; /* This is really htons(ether_type). */
533 struct net_device *dev; /* NULL is wildcarded here */
534 int (*func) (struct sk_buff *,
536 struct packet_type *,
537 struct net_device *);
538 void *af_packet_priv;
539 struct list_head list;
542 #include <linux/interrupt.h>
543 #include <linux/notifier.h>
545 extern struct net_device loopback_dev; /* The loopback */
546 extern struct net_device *dev_base; /* All devices */
547 extern rwlock_t dev_base_lock; /* Device list lock */
549 extern int netdev_boot_setup_check(struct net_device *dev);
550 extern unsigned long netdev_boot_base(const char *prefix, int unit);
551 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
552 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
553 extern void dev_add_pack(struct packet_type *pt);
554 extern void dev_remove_pack(struct packet_type *pt);
555 extern void __dev_remove_pack(struct packet_type *pt);
557 extern struct net_device *dev_get_by_flags(unsigned short flags,
558 unsigned short mask);
559 extern struct net_device *dev_get_by_name(const char *name);
560 extern struct net_device *__dev_get_by_name(const char *name);
561 extern int dev_alloc_name(struct net_device *dev, const char *name);
562 extern int dev_open(struct net_device *dev);
563 extern int dev_close(struct net_device *dev);
564 extern int dev_queue_xmit(struct sk_buff *skb);
565 extern int register_netdevice(struct net_device *dev);
566 extern int unregister_netdevice(struct net_device *dev);
567 extern void free_netdev(struct net_device *dev);
568 extern void synchronize_net(void);
569 extern int register_netdevice_notifier(struct notifier_block *nb);
570 extern int unregister_netdevice_notifier(struct notifier_block *nb);
571 extern int call_netdevice_notifiers(unsigned long val, void *v);
572 extern struct net_device *dev_get_by_index(int ifindex);
573 extern struct net_device *__dev_get_by_index(int ifindex);
574 extern int dev_restart(struct net_device *dev);
575 #ifdef CONFIG_NETPOLL_TRAP
576 extern int netpoll_trap(void);
579 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
580 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
581 static inline int unregister_gifconf(unsigned int family)
583 return register_gifconf(family, NULL);
587 * Incoming packets are placed on per-cpu queues so that
588 * no locking is needed.
593 struct net_device *output_queue;
594 struct sk_buff_head input_pkt_queue;
595 struct list_head poll_list;
596 struct sk_buff *completion_queue;
598 struct net_device backlog_dev; /* Sorry. 8) */
599 #ifdef CONFIG_NET_DMA
600 struct dma_chan *net_dma;
604 DECLARE_PER_CPU(struct softnet_data,softnet_data);
606 #define HAVE_NETIF_QUEUE
608 extern void __netif_schedule(struct net_device *dev);
610 static inline void netif_schedule(struct net_device *dev)
612 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
613 __netif_schedule(dev);
616 static inline void netif_start_queue(struct net_device *dev)
618 clear_bit(__LINK_STATE_XOFF, &dev->state);
621 static inline void netif_wake_queue(struct net_device *dev)
623 #ifdef CONFIG_NETPOLL_TRAP
627 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
628 __netif_schedule(dev);
631 static inline void netif_stop_queue(struct net_device *dev)
633 #ifdef CONFIG_NETPOLL_TRAP
637 set_bit(__LINK_STATE_XOFF, &dev->state);
640 static inline int netif_queue_stopped(const struct net_device *dev)
642 return test_bit(__LINK_STATE_XOFF, &dev->state);
645 static inline int netif_running(const struct net_device *dev)
647 return test_bit(__LINK_STATE_START, &dev->state);
651 /* Use this variant when it is known for sure that it
652 * is executing from interrupt context.
654 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
656 if (atomic_dec_and_test(&skb->users)) {
657 struct softnet_data *sd;
660 local_irq_save(flags);
661 sd = &__get_cpu_var(softnet_data);
662 skb->next = sd->completion_queue;
663 sd->completion_queue = skb;
664 raise_softirq_irqoff(NET_TX_SOFTIRQ);
665 local_irq_restore(flags);
669 /* Use this variant in places where it could be invoked
670 * either from interrupt or non-interrupt context.
672 extern void dev_kfree_skb_any(struct sk_buff *skb);
674 #define HAVE_NETIF_RX 1
675 extern int netif_rx(struct sk_buff *skb);
676 extern int netif_rx_ni(struct sk_buff *skb);
677 #define HAVE_NETIF_RECEIVE_SKB 1
678 extern int netif_receive_skb(struct sk_buff *skb);
679 extern int dev_valid_name(const char *name);
680 extern int dev_ioctl(unsigned int cmd, void __user *);
681 extern int dev_ethtool(struct ifreq *);
682 extern unsigned dev_get_flags(const struct net_device *);
683 extern int dev_change_flags(struct net_device *, unsigned);
684 extern int dev_change_name(struct net_device *, char *);
685 extern int dev_set_mtu(struct net_device *, int);
686 extern int dev_set_mac_address(struct net_device *,
688 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
690 extern void dev_init(void);
692 extern int netdev_nit;
693 extern int netdev_budget;
695 /* Called by rtnetlink.c:rtnl_unlock() */
696 extern void netdev_run_todo(void);
698 static inline void dev_put(struct net_device *dev)
700 atomic_dec(&dev->refcnt);
703 static inline void dev_hold(struct net_device *dev)
705 atomic_inc(&dev->refcnt);
708 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
709 * and _off may be called from IRQ context, but it is caller
710 * who is responsible for serialization of these calls.
712 * The name carrier is inappropriate, these functions should really be
713 * called netif_lowerlayer_*() because they represent the state of any
714 * kind of lower layer not just hardware media.
717 extern void linkwatch_fire_event(struct net_device *dev);
719 static inline int netif_carrier_ok(const struct net_device *dev)
721 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
724 extern void __netdev_watchdog_up(struct net_device *dev);
726 extern void netif_carrier_on(struct net_device *dev);
728 extern void netif_carrier_off(struct net_device *dev);
730 static inline void netif_dormant_on(struct net_device *dev)
732 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
733 linkwatch_fire_event(dev);
736 static inline void netif_dormant_off(struct net_device *dev)
738 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
739 linkwatch_fire_event(dev);
742 static inline int netif_dormant(const struct net_device *dev)
744 return test_bit(__LINK_STATE_DORMANT, &dev->state);
748 static inline int netif_oper_up(const struct net_device *dev) {
749 return (dev->operstate == IF_OPER_UP ||
750 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
754 static inline int netif_device_present(struct net_device *dev)
756 return test_bit(__LINK_STATE_PRESENT, &dev->state);
759 extern void netif_device_detach(struct net_device *dev);
761 extern void netif_device_attach(struct net_device *dev);
764 * Network interface message level settings
766 #define HAVE_NETIF_MSG 1
769 NETIF_MSG_DRV = 0x0001,
770 NETIF_MSG_PROBE = 0x0002,
771 NETIF_MSG_LINK = 0x0004,
772 NETIF_MSG_TIMER = 0x0008,
773 NETIF_MSG_IFDOWN = 0x0010,
774 NETIF_MSG_IFUP = 0x0020,
775 NETIF_MSG_RX_ERR = 0x0040,
776 NETIF_MSG_TX_ERR = 0x0080,
777 NETIF_MSG_TX_QUEUED = 0x0100,
778 NETIF_MSG_INTR = 0x0200,
779 NETIF_MSG_TX_DONE = 0x0400,
780 NETIF_MSG_RX_STATUS = 0x0800,
781 NETIF_MSG_PKTDATA = 0x1000,
782 NETIF_MSG_HW = 0x2000,
783 NETIF_MSG_WOL = 0x4000,
786 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
787 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
788 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
789 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
790 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
791 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
792 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
793 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
794 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
795 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
796 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
797 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
798 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
799 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
800 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
802 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
805 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
806 return default_msg_enable_bits;
807 if (debug_value == 0) /* no output */
810 return (1 << debug_value) - 1;
813 /* Test if receive needs to be scheduled */
814 static inline int __netif_rx_schedule_prep(struct net_device *dev)
816 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
819 /* Test if receive needs to be scheduled but only if up */
820 static inline int netif_rx_schedule_prep(struct net_device *dev)
822 return netif_running(dev) && __netif_rx_schedule_prep(dev);
825 /* Add interface to tail of rx poll list. This assumes that _prep has
826 * already been called and returned 1.
829 extern void __netif_rx_schedule(struct net_device *dev);
831 /* Try to reschedule poll. Called by irq handler. */
833 static inline void netif_rx_schedule(struct net_device *dev)
835 if (netif_rx_schedule_prep(dev))
836 __netif_rx_schedule(dev);
839 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
840 * Do not inline this?
842 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
844 if (netif_rx_schedule_prep(dev)) {
849 local_irq_save(flags);
850 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
851 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
852 local_irq_restore(flags);
858 /* Remove interface from poll list: it must be in the poll list
859 * on current cpu. This primitive is called by dev->poll(), when
860 * it completes the work. The device cannot be out of poll list at this
861 * moment, it is BUG().
863 static inline void netif_rx_complete(struct net_device *dev)
867 local_irq_save(flags);
868 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
869 list_del(&dev->poll_list);
870 smp_mb__before_clear_bit();
871 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
872 local_irq_restore(flags);
875 static inline void netif_poll_disable(struct net_device *dev)
877 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
879 schedule_timeout_interruptible(1);
882 static inline void netif_poll_enable(struct net_device *dev)
884 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
887 /* same as netif_rx_complete, except that local_irq_save(flags)
888 * has already been issued
890 static inline void __netif_rx_complete(struct net_device *dev)
892 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
893 list_del(&dev->poll_list);
894 smp_mb__before_clear_bit();
895 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
898 static inline void netif_tx_lock(struct net_device *dev)
900 spin_lock(&dev->_xmit_lock);
901 dev->xmit_lock_owner = smp_processor_id();
904 static inline void netif_tx_lock_bh(struct net_device *dev)
906 spin_lock_bh(&dev->_xmit_lock);
907 dev->xmit_lock_owner = smp_processor_id();
910 static inline int netif_tx_trylock(struct net_device *dev)
912 int err = spin_trylock(&dev->_xmit_lock);
914 dev->xmit_lock_owner = smp_processor_id();
918 static inline void netif_tx_unlock(struct net_device *dev)
920 dev->xmit_lock_owner = -1;
921 spin_unlock(&dev->_xmit_lock);
924 static inline void netif_tx_unlock_bh(struct net_device *dev)
926 dev->xmit_lock_owner = -1;
927 spin_unlock_bh(&dev->_xmit_lock);
930 static inline void netif_tx_disable(struct net_device *dev)
932 netif_tx_lock_bh(dev);
933 netif_stop_queue(dev);
934 netif_tx_unlock_bh(dev);
937 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
939 extern void ether_setup(struct net_device *dev);
941 /* Support for loadable net-drivers */
942 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
943 void (*setup)(struct net_device *));
944 extern int register_netdev(struct net_device *dev);
945 extern void unregister_netdev(struct net_device *dev);
946 /* Functions used for multicast support */
947 extern void dev_mc_upload(struct net_device *dev);
948 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
949 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
950 extern void dev_mc_discard(struct net_device *dev);
951 extern void dev_set_promiscuity(struct net_device *dev, int inc);
952 extern void dev_set_allmulti(struct net_device *dev, int inc);
953 extern void netdev_state_change(struct net_device *dev);
954 extern void netdev_features_change(struct net_device *dev);
955 /* Load a device via the kmod */
956 extern void dev_load(const char *name);
957 extern void dev_mcast_init(void);
958 extern int netdev_max_backlog;
960 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
961 extern int skb_checksum_help(struct sk_buff *skb, int inward);
963 extern void netdev_rx_csum_fault(struct net_device *dev);
965 static inline void netdev_rx_csum_fault(struct net_device *dev)
969 /* rx skb timestamps */
970 extern void net_enable_timestamp(void);
971 extern void net_disable_timestamp(void);
973 #ifdef CONFIG_PROC_FS
974 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
975 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
976 extern void dev_seq_stop(struct seq_file *seq, void *v);
979 extern void linkwatch_run_queue(void);
981 #endif /* __KERNEL__ */
983 #endif /* _LINUX_DEV_H */