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/config.h>
38 #include <linux/device.h>
39 #include <linux/percpu.h>
40 #include <linux/dmaengine.h>
46 /* source back-compat hooks */
47 #define SET_ETHTOOL_OPS(netdev,ops) \
48 ( (netdev)->ethtool_ops = (ops) )
50 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
51 functions are available. */
52 #define HAVE_FREE_NETDEV /* free_netdev() */
53 #define HAVE_NETDEV_PRIV /* netdev_priv() */
55 #define NET_XMIT_SUCCESS 0
56 #define NET_XMIT_DROP 1 /* skb dropped */
57 #define NET_XMIT_CN 2 /* congestion notification */
58 #define NET_XMIT_POLICED 3 /* skb is shot by police */
59 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
60 (TC use only - dev_queue_xmit
61 returns this as NET_XMIT_SUCCESS) */
63 /* Backlog congestion levels */
64 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
65 #define NET_RX_DROP 1 /* packet dropped */
66 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
67 #define NET_RX_CN_MOD 3 /* Storm on its way! */
68 #define NET_RX_CN_HIGH 4 /* The storm is here */
69 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
71 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
75 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
77 /* Driver transmit return codes */
78 #define NETDEV_TX_OK 0 /* driver took care of packet */
79 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
80 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
83 * Compute the worst case header length according to the protocols
87 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
88 #define LL_MAX_HEADER 32
90 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
91 #define LL_MAX_HEADER 96
93 #define LL_MAX_HEADER 48
97 #if !defined(CONFIG_NET_IPIP) && \
98 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
99 #define MAX_HEADER LL_MAX_HEADER
101 #define MAX_HEADER (LL_MAX_HEADER + 48)
105 * Network device statistics. Akin to the 2.0 ether stats but
106 * with byte counters.
109 struct net_device_stats
111 unsigned long rx_packets; /* total packets received */
112 unsigned long tx_packets; /* total packets transmitted */
113 unsigned long rx_bytes; /* total bytes received */
114 unsigned long tx_bytes; /* total bytes transmitted */
115 unsigned long rx_errors; /* bad packets received */
116 unsigned long tx_errors; /* packet transmit problems */
117 unsigned long rx_dropped; /* no space in linux buffers */
118 unsigned long tx_dropped; /* no space available in linux */
119 unsigned long multicast; /* multicast packets received */
120 unsigned long collisions;
122 /* detailed rx_errors: */
123 unsigned long rx_length_errors;
124 unsigned long rx_over_errors; /* receiver ring buff overflow */
125 unsigned long rx_crc_errors; /* recved pkt with crc error */
126 unsigned long rx_frame_errors; /* recv'd frame alignment error */
127 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
128 unsigned long rx_missed_errors; /* receiver missed packet */
130 /* detailed tx_errors */
131 unsigned long tx_aborted_errors;
132 unsigned long tx_carrier_errors;
133 unsigned long tx_fifo_errors;
134 unsigned long tx_heartbeat_errors;
135 unsigned long tx_window_errors;
138 unsigned long rx_compressed;
139 unsigned long tx_compressed;
143 /* Media selection options. */
156 #include <linux/cache.h>
157 #include <linux/skbuff.h>
163 struct netif_rx_stats
167 unsigned time_squeeze;
168 unsigned cpu_collision;
171 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
175 * We tag multicasts with these structures.
180 struct dev_mc_list *next;
181 __u8 dmi_addr[MAX_ADDR_LEN];
182 unsigned char dmi_addrlen;
189 struct hh_cache *hh_next; /* Next entry */
190 atomic_t hh_refcnt; /* number of users */
191 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
192 * NOTE: For VLANs, this will be the
193 * encapuslated type. --BLG
195 int hh_len; /* length of header */
196 int (*hh_output)(struct sk_buff *skb);
199 /* cached hardware header; allow for machine alignment needs. */
200 #define HH_DATA_MOD 16
201 #define HH_DATA_OFF(__len) \
202 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
203 #define HH_DATA_ALIGN(__len) \
204 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
205 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
208 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
210 * dev->hard_header_len ? (dev->hard_header_len +
211 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
213 * We could use other alignment values, but we must maintain the
214 * relationship HH alignment <= LL alignment.
216 #define LL_RESERVED_SPACE(dev) \
217 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
218 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
219 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
221 /* These flag bits are private to the generic network queueing
222 * layer, they may not be explicitly referenced by any other
230 __LINK_STATE_PRESENT,
232 __LINK_STATE_NOCARRIER,
233 __LINK_STATE_RX_SCHED,
234 __LINK_STATE_LINKWATCH_PENDING,
235 __LINK_STATE_DORMANT,
236 __LINK_STATE_QDISC_RUNNING,
241 * This structure holds at boot time configured netdevice settings. They
242 * are then used in the device probing.
244 struct netdev_boot_setup {
248 #define NETDEV_BOOT_SETUP_MAX 8
250 extern int __init netdev_boot_setup(char *str);
253 * The DEVICE structure.
254 * Actually, this whole structure is a big mistake. It mixes I/O
255 * data with strictly "high-level" data, and it has to know about
256 * almost every data structure used in the INET module.
258 * FIXME: cleanup struct net_device such that network protocol info
266 * This is the first field of the "visible" part of this structure
267 * (i.e. as seen by users in the "Space.c" file). It is the name
271 /* device name hash chain */
272 struct hlist_node name_hlist;
275 * I/O specific fields
276 * FIXME: Merge these and struct ifmap into one
278 unsigned long mem_end; /* shared mem end */
279 unsigned long mem_start; /* shared mem start */
280 unsigned long base_addr; /* device I/O address */
281 unsigned int irq; /* device IRQ number */
284 * Some hardware also needs these fields, but they are not
285 * part of the usual set specified in Space.c.
288 unsigned char if_port; /* Selectable AUI, TP,..*/
289 unsigned char dma; /* DMA channel */
293 struct net_device *next;
295 /* The device initialization function. Called only once. */
296 int (*init)(struct net_device *dev);
298 /* ------- Fields preinitialized in Space.c finish here ------- */
300 /* Net device features */
301 unsigned long features;
302 #define NETIF_F_SG 1 /* Scatter/gather IO. */
303 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
304 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
305 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
306 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
307 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
308 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
309 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
310 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
311 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
312 #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
313 #define NETIF_F_LLTX 4096 /* LockLess TX */
314 #define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/
316 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
317 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
319 struct net_device *next_sched;
321 /* Interface index. Unique device identifier */
326 struct net_device_stats* (*get_stats)(struct net_device *dev);
327 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
329 /* List of functions to handle Wireless Extensions (instead of ioctl).
330 * See <net/iw_handler.h> for details. Jean II */
331 const struct iw_handler_def * wireless_handlers;
332 /* Instance data managed by the core of Wireless Extensions. */
333 struct iw_public_data * wireless_data;
335 struct ethtool_ops *ethtool_ops;
338 * This marks the end of the "visible" part of the structure. All
339 * fields hereafter are internal to the system, and may change at
340 * will (read: may be cleaned up at will).
344 unsigned int flags; /* interface flags (a la BSD) */
345 unsigned short gflags;
346 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
347 unsigned short padded; /* How much padding added by alloc_netdev() */
349 unsigned char operstate; /* RFC2863 operstate */
350 unsigned char link_mode; /* mapping policy to operstate */
352 unsigned mtu; /* interface MTU value */
353 unsigned short type; /* interface hardware type */
354 unsigned short hard_header_len; /* hardware hdr length */
356 struct net_device *master; /* Pointer to master device of a group,
357 * which this device is member of.
360 /* Interface address info. */
361 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
362 unsigned char addr_len; /* hardware address length */
363 unsigned short dev_id; /* for shared network cards */
365 struct dev_mc_list *mc_list; /* Multicast mac addresses */
366 int mc_count; /* Number of installed mcasts */
371 /* Protocol specific pointers */
373 void *atalk_ptr; /* AppleTalk link */
374 void *ip_ptr; /* IPv4 specific data */
375 void *dn_ptr; /* DECnet specific data */
376 void *ip6_ptr; /* IPv6 specific data */
377 void *ec_ptr; /* Econet specific data */
378 void *ax25_ptr; /* AX.25 specific data */
381 * Cache line mostly used on receive path (including eth_type_trans())
383 struct list_head poll_list ____cacheline_aligned_in_smp;
384 /* Link to poll list */
386 int (*poll) (struct net_device *dev, int *quota);
389 unsigned long last_rx; /* Time of last Rx */
390 /* Interface address info used in eth_type_trans() */
391 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
392 because most packets are unicast) */
394 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
397 * Cache line mostly used on queue transmit path (qdisc)
399 /* device queue lock */
400 spinlock_t queue_lock ____cacheline_aligned_in_smp;
402 struct Qdisc *qdisc_sleeping;
403 struct list_head qdisc_list;
404 unsigned long tx_queue_len; /* Max frames per queue allowed */
406 /* ingress path synchronizer */
407 spinlock_t ingress_lock;
408 struct Qdisc *qdisc_ingress;
411 * One part is mostly used on xmit path (device)
413 /* hard_start_xmit synchronizer */
414 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
415 /* cpu id of processor entered to hard_start_xmit or -1,
416 if nobody entered there.
419 void *priv; /* pointer to private data */
420 int (*hard_start_xmit) (struct sk_buff *skb,
421 struct net_device *dev);
422 /* These may be needed for future network-power-down code. */
423 unsigned long trans_start; /* Time (in jiffies) of last Tx */
425 int watchdog_timeo; /* used by dev_watchdog() */
426 struct timer_list watchdog_timer;
429 * refcnt is a very hot point, so align it on SMP
431 /* Number of references to this device */
432 atomic_t refcnt ____cacheline_aligned_in_smp;
434 /* delayed register/unregister */
435 struct list_head todo_list;
436 /* device index hash chain */
437 struct hlist_node index_hlist;
439 /* register/unregister state machine */
440 enum { NETREG_UNINITIALIZED=0,
441 NETREG_REGISTERED, /* completed register_netdevice */
442 NETREG_UNREGISTERING, /* called unregister_netdevice */
443 NETREG_UNREGISTERED, /* completed unregister todo */
444 NETREG_RELEASED, /* called free_netdev */
447 /* Called after device is detached from network. */
448 void (*uninit)(struct net_device *dev);
449 /* Called after last user reference disappears. */
450 void (*destructor)(struct net_device *dev);
452 /* Pointers to interface service routines. */
453 int (*open)(struct net_device *dev);
454 int (*stop)(struct net_device *dev);
455 #define HAVE_NETDEV_POLL
456 int (*hard_header) (struct sk_buff *skb,
457 struct net_device *dev,
462 int (*rebuild_header)(struct sk_buff *skb);
463 #define HAVE_MULTICAST
464 void (*set_multicast_list)(struct net_device *dev);
465 #define HAVE_SET_MAC_ADDR
466 int (*set_mac_address)(struct net_device *dev,
468 #define HAVE_PRIVATE_IOCTL
469 int (*do_ioctl)(struct net_device *dev,
470 struct ifreq *ifr, int cmd);
471 #define HAVE_SET_CONFIG
472 int (*set_config)(struct net_device *dev,
474 #define HAVE_HEADER_CACHE
475 int (*hard_header_cache)(struct neighbour *neigh,
476 struct hh_cache *hh);
477 void (*header_cache_update)(struct hh_cache *hh,
478 struct net_device *dev,
479 unsigned char * haddr);
480 #define HAVE_CHANGE_MTU
481 int (*change_mtu)(struct net_device *dev, int new_mtu);
483 #define HAVE_TX_TIMEOUT
484 void (*tx_timeout) (struct net_device *dev);
486 void (*vlan_rx_register)(struct net_device *dev,
487 struct vlan_group *grp);
488 void (*vlan_rx_add_vid)(struct net_device *dev,
490 void (*vlan_rx_kill_vid)(struct net_device *dev,
493 int (*hard_header_parse)(struct sk_buff *skb,
494 unsigned char *haddr);
495 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
496 #ifdef CONFIG_NETPOLL
497 struct netpoll_info *npinfo;
499 #ifdef CONFIG_NET_POLL_CONTROLLER
500 void (*poll_controller)(struct net_device *dev);
504 struct net_bridge_port *br_port;
506 #ifdef CONFIG_NET_DIVERT
507 /* this will get initialized at each interface type init routine */
508 struct divert_blk *divert;
509 #endif /* CONFIG_NET_DIVERT */
511 /* class/net/name entry */
512 struct class_device class_dev;
513 /* space for optional statistics and wireless sysfs groups */
514 struct attribute_group *sysfs_groups[3];
517 #define NETDEV_ALIGN 32
518 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
520 static inline void *netdev_priv(struct net_device *dev)
522 return (char *)dev + ((sizeof(struct net_device)
523 + NETDEV_ALIGN_CONST)
524 & ~NETDEV_ALIGN_CONST);
527 #define SET_MODULE_OWNER(dev) do { } while (0)
528 /* Set the sysfs physical device reference for the network logical device
529 * if set prior to registration will cause a symlink during initialization.
531 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
534 __be16 type; /* This is really htons(ether_type). */
535 struct net_device *dev; /* NULL is wildcarded here */
536 int (*func) (struct sk_buff *,
538 struct packet_type *,
539 struct net_device *);
540 void *af_packet_priv;
541 struct list_head list;
544 #include <linux/interrupt.h>
545 #include <linux/notifier.h>
547 extern struct net_device loopback_dev; /* The loopback */
548 extern struct net_device *dev_base; /* All devices */
549 extern rwlock_t dev_base_lock; /* Device list lock */
551 extern int netdev_boot_setup_check(struct net_device *dev);
552 extern unsigned long netdev_boot_base(const char *prefix, int unit);
553 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
554 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
555 extern void dev_add_pack(struct packet_type *pt);
556 extern void dev_remove_pack(struct packet_type *pt);
557 extern void __dev_remove_pack(struct packet_type *pt);
559 extern struct net_device *dev_get_by_flags(unsigned short flags,
560 unsigned short mask);
561 extern struct net_device *dev_get_by_name(const char *name);
562 extern struct net_device *__dev_get_by_name(const char *name);
563 extern int dev_alloc_name(struct net_device *dev, const char *name);
564 extern int dev_open(struct net_device *dev);
565 extern int dev_close(struct net_device *dev);
566 extern int dev_queue_xmit(struct sk_buff *skb);
567 extern int register_netdevice(struct net_device *dev);
568 extern int unregister_netdevice(struct net_device *dev);
569 extern void free_netdev(struct net_device *dev);
570 extern void synchronize_net(void);
571 extern int register_netdevice_notifier(struct notifier_block *nb);
572 extern int unregister_netdevice_notifier(struct notifier_block *nb);
573 extern int call_netdevice_notifiers(unsigned long val, void *v);
574 extern struct net_device *dev_get_by_index(int ifindex);
575 extern struct net_device *__dev_get_by_index(int ifindex);
576 extern int dev_restart(struct net_device *dev);
577 #ifdef CONFIG_NETPOLL_TRAP
578 extern int netpoll_trap(void);
581 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
582 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
583 static inline int unregister_gifconf(unsigned int family)
585 return register_gifconf(family, NULL);
589 * Incoming packets are placed on per-cpu queues so that
590 * no locking is needed.
595 struct net_device *output_queue;
596 struct sk_buff_head input_pkt_queue;
597 struct list_head poll_list;
598 struct sk_buff *completion_queue;
600 struct net_device backlog_dev; /* Sorry. 8) */
601 #ifdef CONFIG_NET_DMA
602 struct dma_chan *net_dma;
606 DECLARE_PER_CPU(struct softnet_data,softnet_data);
608 #define HAVE_NETIF_QUEUE
610 extern void __netif_schedule(struct net_device *dev);
612 static inline void netif_schedule(struct net_device *dev)
614 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
615 __netif_schedule(dev);
618 static inline void netif_start_queue(struct net_device *dev)
620 clear_bit(__LINK_STATE_XOFF, &dev->state);
623 static inline void netif_wake_queue(struct net_device *dev)
625 #ifdef CONFIG_NETPOLL_TRAP
629 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
630 __netif_schedule(dev);
633 static inline void netif_stop_queue(struct net_device *dev)
635 #ifdef CONFIG_NETPOLL_TRAP
639 set_bit(__LINK_STATE_XOFF, &dev->state);
642 static inline int netif_queue_stopped(const struct net_device *dev)
644 return test_bit(__LINK_STATE_XOFF, &dev->state);
647 static inline int netif_running(const struct net_device *dev)
649 return test_bit(__LINK_STATE_START, &dev->state);
653 /* Use this variant when it is known for sure that it
654 * is executing from interrupt context.
656 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
658 if (atomic_dec_and_test(&skb->users)) {
659 struct softnet_data *sd;
662 local_irq_save(flags);
663 sd = &__get_cpu_var(softnet_data);
664 skb->next = sd->completion_queue;
665 sd->completion_queue = skb;
666 raise_softirq_irqoff(NET_TX_SOFTIRQ);
667 local_irq_restore(flags);
671 /* Use this variant in places where it could be invoked
672 * either from interrupt or non-interrupt context.
674 extern void dev_kfree_skb_any(struct sk_buff *skb);
676 #define HAVE_NETIF_RX 1
677 extern int netif_rx(struct sk_buff *skb);
678 extern int netif_rx_ni(struct sk_buff *skb);
679 #define HAVE_NETIF_RECEIVE_SKB 1
680 extern int netif_receive_skb(struct sk_buff *skb);
681 extern int dev_valid_name(const char *name);
682 extern int dev_ioctl(unsigned int cmd, void __user *);
683 extern int dev_ethtool(struct ifreq *);
684 extern unsigned dev_get_flags(const struct net_device *);
685 extern int dev_change_flags(struct net_device *, unsigned);
686 extern int dev_change_name(struct net_device *, char *);
687 extern int dev_set_mtu(struct net_device *, int);
688 extern int dev_set_mac_address(struct net_device *,
690 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
692 extern void dev_init(void);
694 extern int netdev_nit;
695 extern int netdev_budget;
697 /* Called by rtnetlink.c:rtnl_unlock() */
698 extern void netdev_run_todo(void);
700 static inline void dev_put(struct net_device *dev)
702 atomic_dec(&dev->refcnt);
705 static inline void dev_hold(struct net_device *dev)
707 atomic_inc(&dev->refcnt);
710 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
711 * and _off may be called from IRQ context, but it is caller
712 * who is responsible for serialization of these calls.
714 * The name carrier is inappropriate, these functions should really be
715 * called netif_lowerlayer_*() because they represent the state of any
716 * kind of lower layer not just hardware media.
719 extern void linkwatch_fire_event(struct net_device *dev);
721 static inline int netif_carrier_ok(const struct net_device *dev)
723 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
726 extern void __netdev_watchdog_up(struct net_device *dev);
728 extern void netif_carrier_on(struct net_device *dev);
730 extern void netif_carrier_off(struct net_device *dev);
732 static inline void netif_dormant_on(struct net_device *dev)
734 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
735 linkwatch_fire_event(dev);
738 static inline void netif_dormant_off(struct net_device *dev)
740 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
741 linkwatch_fire_event(dev);
744 static inline int netif_dormant(const struct net_device *dev)
746 return test_bit(__LINK_STATE_DORMANT, &dev->state);
750 static inline int netif_oper_up(const struct net_device *dev) {
751 return (dev->operstate == IF_OPER_UP ||
752 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
756 static inline int netif_device_present(struct net_device *dev)
758 return test_bit(__LINK_STATE_PRESENT, &dev->state);
761 extern void netif_device_detach(struct net_device *dev);
763 extern void netif_device_attach(struct net_device *dev);
766 * Network interface message level settings
768 #define HAVE_NETIF_MSG 1
771 NETIF_MSG_DRV = 0x0001,
772 NETIF_MSG_PROBE = 0x0002,
773 NETIF_MSG_LINK = 0x0004,
774 NETIF_MSG_TIMER = 0x0008,
775 NETIF_MSG_IFDOWN = 0x0010,
776 NETIF_MSG_IFUP = 0x0020,
777 NETIF_MSG_RX_ERR = 0x0040,
778 NETIF_MSG_TX_ERR = 0x0080,
779 NETIF_MSG_TX_QUEUED = 0x0100,
780 NETIF_MSG_INTR = 0x0200,
781 NETIF_MSG_TX_DONE = 0x0400,
782 NETIF_MSG_RX_STATUS = 0x0800,
783 NETIF_MSG_PKTDATA = 0x1000,
784 NETIF_MSG_HW = 0x2000,
785 NETIF_MSG_WOL = 0x4000,
788 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
789 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
790 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
791 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
792 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
793 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
794 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
795 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
796 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
797 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
798 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
799 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
800 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
801 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
802 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
804 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
807 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
808 return default_msg_enable_bits;
809 if (debug_value == 0) /* no output */
812 return (1 << debug_value) - 1;
815 /* Test if receive needs to be scheduled */
816 static inline int __netif_rx_schedule_prep(struct net_device *dev)
818 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
821 /* Test if receive needs to be scheduled but only if up */
822 static inline int netif_rx_schedule_prep(struct net_device *dev)
824 return netif_running(dev) && __netif_rx_schedule_prep(dev);
827 /* Add interface to tail of rx poll list. This assumes that _prep has
828 * already been called and returned 1.
831 extern void __netif_rx_schedule(struct net_device *dev);
833 /* Try to reschedule poll. Called by irq handler. */
835 static inline void netif_rx_schedule(struct net_device *dev)
837 if (netif_rx_schedule_prep(dev))
838 __netif_rx_schedule(dev);
841 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
842 * Do not inline this?
844 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
846 if (netif_rx_schedule_prep(dev)) {
851 local_irq_save(flags);
852 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
853 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
854 local_irq_restore(flags);
860 /* Remove interface from poll list: it must be in the poll list
861 * on current cpu. This primitive is called by dev->poll(), when
862 * it completes the work. The device cannot be out of poll list at this
863 * moment, it is BUG().
865 static inline void netif_rx_complete(struct net_device *dev)
869 local_irq_save(flags);
870 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
871 list_del(&dev->poll_list);
872 smp_mb__before_clear_bit();
873 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
874 local_irq_restore(flags);
877 static inline void netif_poll_disable(struct net_device *dev)
879 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
881 schedule_timeout_interruptible(1);
884 static inline void netif_poll_enable(struct net_device *dev)
886 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
889 /* same as netif_rx_complete, except that local_irq_save(flags)
890 * has already been issued
892 static inline void __netif_rx_complete(struct net_device *dev)
894 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
895 list_del(&dev->poll_list);
896 smp_mb__before_clear_bit();
897 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
900 static inline void netif_tx_lock(struct net_device *dev)
902 spin_lock(&dev->_xmit_lock);
903 dev->xmit_lock_owner = smp_processor_id();
906 static inline void netif_tx_lock_bh(struct net_device *dev)
908 spin_lock_bh(&dev->_xmit_lock);
909 dev->xmit_lock_owner = smp_processor_id();
912 static inline int netif_tx_trylock(struct net_device *dev)
914 int err = spin_trylock(&dev->_xmit_lock);
916 dev->xmit_lock_owner = smp_processor_id();
920 static inline void netif_tx_unlock(struct net_device *dev)
922 dev->xmit_lock_owner = -1;
923 spin_unlock(&dev->_xmit_lock);
926 static inline void netif_tx_unlock_bh(struct net_device *dev)
928 dev->xmit_lock_owner = -1;
929 spin_unlock_bh(&dev->_xmit_lock);
932 static inline void netif_tx_disable(struct net_device *dev)
934 netif_tx_lock_bh(dev);
935 netif_stop_queue(dev);
936 netif_tx_unlock_bh(dev);
939 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
941 extern void ether_setup(struct net_device *dev);
943 /* Support for loadable net-drivers */
944 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
945 void (*setup)(struct net_device *));
946 extern int register_netdev(struct net_device *dev);
947 extern void unregister_netdev(struct net_device *dev);
948 /* Functions used for multicast support */
949 extern void dev_mc_upload(struct net_device *dev);
950 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
951 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
952 extern void dev_mc_discard(struct net_device *dev);
953 extern void dev_set_promiscuity(struct net_device *dev, int inc);
954 extern void dev_set_allmulti(struct net_device *dev, int inc);
955 extern void netdev_state_change(struct net_device *dev);
956 extern void netdev_features_change(struct net_device *dev);
957 /* Load a device via the kmod */
958 extern void dev_load(const char *name);
959 extern void dev_mcast_init(void);
960 extern int netdev_max_backlog;
962 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
963 extern int skb_checksum_help(struct sk_buff *skb, int inward);
965 extern void netdev_rx_csum_fault(struct net_device *dev);
967 static inline void netdev_rx_csum_fault(struct net_device *dev)
971 /* rx skb timestamps */
972 extern void net_enable_timestamp(void);
973 extern void net_disable_timestamp(void);
975 #ifdef CONFIG_PROC_FS
976 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
977 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
978 extern void dev_seq_stop(struct seq_file *seq, void *v);
981 extern void linkwatch_run_queue(void);
983 #endif /* __KERNEL__ */
985 #endif /* _LINUX_DEV_H */