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
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
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>
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;
168 unsigned fastroute_hit;
169 unsigned fastroute_success;
170 unsigned fastroute_defer;
171 unsigned fastroute_deferred_out;
172 unsigned fastroute_latency_reduction;
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 */
196 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
197 * NOTE: For VLANs, this will be the
198 * encapuslated type. --BLG
200 int hh_len; /* length of header */
201 int (*hh_output)(struct sk_buff *skb);
204 /* cached hardware header; allow for machine alignment needs. */
205 #define HH_DATA_MOD 16
206 #define HH_DATA_OFF(__len) \
207 (HH_DATA_MOD - ((__len) & (HH_DATA_MOD - 1)))
208 #define HH_DATA_ALIGN(__len) \
209 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
210 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
213 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
215 * dev->hard_header_len ? (dev->hard_header_len +
216 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
218 * We could use other alignment values, but we must maintain the
219 * relationship HH alignment <= LL alignment.
221 #define LL_RESERVED_SPACE(dev) \
222 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
223 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
224 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
226 /* These flag bits are private to the generic network queueing
227 * layer, they may not be explicitly referenced by any other
235 __LINK_STATE_PRESENT,
237 __LINK_STATE_NOCARRIER,
238 __LINK_STATE_RX_SCHED,
239 __LINK_STATE_LINKWATCH_PENDING
244 * This structure holds at boot time configured netdevice settings. They
245 * are then used in the device probing.
247 struct netdev_boot_setup {
251 #define NETDEV_BOOT_SETUP_MAX 8
255 * The DEVICE structure.
256 * Actually, this whole structure is a big mistake. It mixes I/O
257 * data with strictly "high-level" data, and it has to know about
258 * almost every data structure used in the INET module.
260 * FIXME: cleanup struct net_device such that network protocol info
268 * This is the first field of the "visible" part of this structure
269 * (i.e. as seen by users in the "Space.c" file). It is the name
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 struct net_device *next_sched;
302 /* Interface index. Unique device identifier */
307 struct net_device_stats* (*get_stats)(struct net_device *dev);
308 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
310 /* List of functions to handle Wireless Extensions (instead of ioctl).
311 * See <net/iw_handler.h> for details. Jean II */
312 const struct iw_handler_def * wireless_handlers;
313 /* Instance data managed by the core of Wireless Extensions. */
314 struct iw_public_data * wireless_data;
316 struct ethtool_ops *ethtool_ops;
319 * This marks the end of the "visible" part of the structure. All
320 * fields hereafter are internal to the system, and may change at
321 * will (read: may be cleaned up at will).
324 /* These may be needed for future network-power-down code. */
325 unsigned long trans_start; /* Time (in jiffies) of last Tx */
326 unsigned long last_rx; /* Time of last Rx */
328 unsigned short flags; /* interface flags (a la BSD) */
329 unsigned short gflags;
330 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
331 unsigned short unused_alignment_fixer; /* Because we need priv_flags,
332 * and we want to be 32-bit aligned.
335 unsigned mtu; /* interface MTU value */
336 unsigned short type; /* interface hardware type */
337 unsigned short hard_header_len; /* hardware hdr length */
338 void *priv; /* pointer to private data */
340 struct net_device *master; /* Pointer to master device of a group,
341 * which this device is member of.
344 /* Interface address info. */
345 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
346 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
347 unsigned char addr_len; /* hardware address length */
349 struct dev_mc_list *mc_list; /* Multicast mac addresses */
350 int mc_count; /* Number of installed mcasts */
355 struct timer_list watchdog_timer;
357 /* Protocol specific pointers */
359 void *atalk_ptr; /* AppleTalk link */
360 void *ip_ptr; /* IPv4 specific data */
361 void *dn_ptr; /* DECnet specific data */
362 void *ip6_ptr; /* IPv6 specific data */
363 void *ec_ptr; /* Econet specific data */
364 void *ax25_ptr; /* AX.25 specific data */
366 struct list_head poll_list; /* Link to poll list */
371 struct Qdisc *qdisc_sleeping;
372 struct Qdisc *qdisc_ingress;
373 struct list_head qdisc_list;
374 unsigned long tx_queue_len; /* Max frames per queue allowed */
376 /* ingress path synchronizer */
377 spinlock_t ingress_lock;
378 /* hard_start_xmit synchronizer */
379 spinlock_t xmit_lock;
380 /* cpu id of processor entered to hard_start_xmit or -1,
381 if nobody entered there.
384 /* device queue lock */
385 spinlock_t queue_lock;
386 /* Number of references to this device */
388 /* delayed register/unregister */
389 struct list_head todo_list;
390 /* device name hash chain */
391 struct hlist_node name_hlist;
392 /* device index hash chain */
393 struct hlist_node index_hlist;
395 /* register/unregister state machine */
396 enum { NETREG_UNINITIALIZED=0,
397 NETREG_REGISTERING, /* called register_netdevice */
398 NETREG_REGISTERED, /* completed register todo */
399 NETREG_UNREGISTERING, /* called unregister_netdevice */
400 NETREG_UNREGISTERED, /* completed unregister todo */
401 NETREG_RELEASED, /* called free_netdev */
404 /* Net device features */
406 #define NETIF_F_SG 1 /* Scatter/gather IO. */
407 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
408 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
409 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
410 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
411 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
412 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
413 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
414 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
415 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
416 #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
417 #define NETIF_F_LLTX 4096 /* LockLess TX */
419 /* Called after device is detached from network. */
420 void (*uninit)(struct net_device *dev);
421 /* Called after last user reference disappears. */
422 void (*destructor)(struct net_device *dev);
424 /* Pointers to interface service routines. */
425 int (*open)(struct net_device *dev);
426 int (*stop)(struct net_device *dev);
427 int (*hard_start_xmit) (struct sk_buff *skb,
428 struct net_device *dev);
429 #define HAVE_NETDEV_POLL
430 int (*poll) (struct net_device *dev, int *quota);
431 int (*hard_header) (struct sk_buff *skb,
432 struct net_device *dev,
437 int (*rebuild_header)(struct sk_buff *skb);
438 #define HAVE_MULTICAST
439 void (*set_multicast_list)(struct net_device *dev);
440 #define HAVE_SET_MAC_ADDR
441 int (*set_mac_address)(struct net_device *dev,
443 #define HAVE_PRIVATE_IOCTL
444 int (*do_ioctl)(struct net_device *dev,
445 struct ifreq *ifr, int cmd);
446 #define HAVE_SET_CONFIG
447 int (*set_config)(struct net_device *dev,
449 #define HAVE_HEADER_CACHE
450 int (*hard_header_cache)(struct neighbour *neigh,
451 struct hh_cache *hh);
452 void (*header_cache_update)(struct hh_cache *hh,
453 struct net_device *dev,
454 unsigned char * haddr);
455 #define HAVE_CHANGE_MTU
456 int (*change_mtu)(struct net_device *dev, int new_mtu);
458 #define HAVE_TX_TIMEOUT
459 void (*tx_timeout) (struct net_device *dev);
461 void (*vlan_rx_register)(struct net_device *dev,
462 struct vlan_group *grp);
463 void (*vlan_rx_add_vid)(struct net_device *dev,
465 void (*vlan_rx_kill_vid)(struct net_device *dev,
468 int (*hard_header_parse)(struct sk_buff *skb,
469 unsigned char *haddr);
470 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
471 int (*accept_fastpath)(struct net_device *, struct dst_entry*);
472 #ifdef CONFIG_NETPOLL
475 #ifdef CONFIG_NET_POLL_CONTROLLER
476 void (*poll_controller)(struct net_device *dev);
480 struct net_bridge_port *br_port;
482 #ifdef CONFIG_NET_DIVERT
483 /* this will get initialized at each interface type init routine */
484 struct divert_blk *divert;
485 #endif /* CONFIG_NET_DIVERT */
487 /* class/net/name entry */
488 struct class_device class_dev;
489 /* how much padding had been added by alloc_netdev() */
493 #define NETDEV_ALIGN 32
494 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
496 static inline void *netdev_priv(struct net_device *dev)
498 return (char *)dev + ((sizeof(struct net_device)
499 + NETDEV_ALIGN_CONST)
500 & ~NETDEV_ALIGN_CONST);
503 #define SET_MODULE_OWNER(dev) do { } while (0)
504 /* Set the sysfs physical device reference for the network logical device
505 * if set prior to registration will cause a symlink during initialization.
507 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
510 unsigned short type; /* This is really htons(ether_type). */
511 struct net_device *dev; /* NULL is wildcarded here */
512 int (*func) (struct sk_buff *, struct net_device *,
513 struct packet_type *);
514 void *af_packet_priv;
515 struct list_head list;
518 #include <linux/interrupt.h>
519 #include <linux/notifier.h>
521 extern struct net_device loopback_dev; /* The loopback */
522 extern struct net_device *dev_base; /* All devices */
523 extern rwlock_t dev_base_lock; /* Device list lock */
525 extern int netdev_boot_setup_add(char *name, struct ifmap *map);
526 extern int netdev_boot_setup_check(struct net_device *dev);
527 extern unsigned long netdev_boot_base(const char *prefix, int unit);
528 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
529 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
530 extern void dev_add_pack(struct packet_type *pt);
531 extern void dev_remove_pack(struct packet_type *pt);
532 extern void __dev_remove_pack(struct packet_type *pt);
534 extern struct net_device *dev_get_by_flags(unsigned short flags,
535 unsigned short mask);
536 extern struct net_device *dev_get_by_name(const char *name);
537 extern struct net_device *__dev_get_by_name(const char *name);
538 extern int dev_alloc_name(struct net_device *dev, const char *name);
539 extern int dev_open(struct net_device *dev);
540 extern int dev_close(struct net_device *dev);
541 extern int dev_queue_xmit(struct sk_buff *skb);
542 extern int register_netdevice(struct net_device *dev);
543 extern int unregister_netdevice(struct net_device *dev);
544 extern void free_netdev(struct net_device *dev);
545 extern void synchronize_net(void);
546 extern int register_netdevice_notifier(struct notifier_block *nb);
547 extern int unregister_netdevice_notifier(struct notifier_block *nb);
548 extern int call_netdevice_notifiers(unsigned long val, void *v);
549 extern struct net_device *dev_get_by_index(int ifindex);
550 extern struct net_device *__dev_get_by_index(int ifindex);
551 extern int dev_restart(struct net_device *dev);
552 #ifdef CONFIG_NETPOLL_TRAP
553 extern int netpoll_trap(void);
556 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
557 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
558 static inline int unregister_gifconf(unsigned int family)
560 return register_gifconf(family, NULL);
564 * Incoming packets are placed on per-cpu queues so that
565 * no locking is needed.
573 struct sk_buff_head input_pkt_queue;
574 struct list_head poll_list;
575 struct net_device *output_queue;
576 struct sk_buff *completion_queue;
578 struct net_device backlog_dev; /* Sorry. 8) */
581 DECLARE_PER_CPU(struct softnet_data,softnet_data);
583 #define HAVE_NETIF_QUEUE
585 static inline void __netif_schedule(struct net_device *dev)
587 if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
589 struct softnet_data *sd;
591 local_irq_save(flags);
592 sd = &__get_cpu_var(softnet_data);
593 dev->next_sched = sd->output_queue;
594 sd->output_queue = dev;
595 raise_softirq_irqoff(NET_TX_SOFTIRQ);
596 local_irq_restore(flags);
600 static inline void netif_schedule(struct net_device *dev)
602 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
603 __netif_schedule(dev);
606 static inline void netif_start_queue(struct net_device *dev)
608 clear_bit(__LINK_STATE_XOFF, &dev->state);
611 static inline void netif_wake_queue(struct net_device *dev)
613 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
614 __netif_schedule(dev);
617 static inline void netif_stop_queue(struct net_device *dev)
619 set_bit(__LINK_STATE_XOFF, &dev->state);
622 static inline int netif_queue_stopped(const struct net_device *dev)
624 return test_bit(__LINK_STATE_XOFF, &dev->state);
627 static inline int netif_running(const struct net_device *dev)
629 return test_bit(__LINK_STATE_START, &dev->state);
633 /* Use this variant when it is known for sure that it
634 * is executing from interrupt context.
636 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
638 if (atomic_dec_and_test(&skb->users)) {
639 struct softnet_data *sd;
642 local_irq_save(flags);
643 sd = &__get_cpu_var(softnet_data);
644 skb->next = sd->completion_queue;
645 sd->completion_queue = skb;
646 raise_softirq_irqoff(NET_TX_SOFTIRQ);
647 local_irq_restore(flags);
651 /* Use this variant in places where it could be invoked
652 * either from interrupt or non-interrupt context.
654 static inline void dev_kfree_skb_any(struct sk_buff *skb)
656 if (in_irq() || irqs_disabled())
657 dev_kfree_skb_irq(skb);
662 #define HAVE_NETIF_RX 1
663 extern int netif_rx(struct sk_buff *skb);
664 extern int netif_rx_ni(struct sk_buff *skb);
665 #define HAVE_NETIF_RECEIVE_SKB 1
666 extern int netif_receive_skb(struct sk_buff *skb);
667 extern int dev_ioctl(unsigned int cmd, void __user *);
668 extern int dev_ethtool(struct ifreq *);
669 extern unsigned dev_get_flags(const struct net_device *);
670 extern int dev_change_flags(struct net_device *, unsigned);
671 extern int dev_change_name(struct net_device *, char *);
672 extern int dev_set_mtu(struct net_device *, int);
673 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
675 extern void dev_init(void);
677 extern int netdev_nit;
679 /* Called by rtnetlink.c:rtnl_unlock() */
680 extern void netdev_run_todo(void);
682 static inline void dev_put(struct net_device *dev)
684 atomic_dec(&dev->refcnt);
687 #define __dev_put(dev) atomic_dec(&(dev)->refcnt)
688 #define dev_hold(dev) atomic_inc(&(dev)->refcnt)
690 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
691 * and _off may be called from IRQ context, but it is caller
692 * who is responsible for serialization of these calls.
695 extern void linkwatch_fire_event(struct net_device *dev);
697 static inline int netif_carrier_ok(const struct net_device *dev)
699 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
702 extern void __netdev_watchdog_up(struct net_device *dev);
704 static inline void netif_carrier_on(struct net_device *dev)
706 if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
707 linkwatch_fire_event(dev);
708 if (netif_running(dev))
709 __netdev_watchdog_up(dev);
712 static inline void netif_carrier_off(struct net_device *dev)
714 if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
715 linkwatch_fire_event(dev);
719 static inline int netif_device_present(struct net_device *dev)
721 return test_bit(__LINK_STATE_PRESENT, &dev->state);
724 static inline void netif_device_detach(struct net_device *dev)
726 if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
727 netif_running(dev)) {
728 netif_stop_queue(dev);
732 static inline void netif_device_attach(struct net_device *dev)
734 if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
735 netif_running(dev)) {
736 netif_wake_queue(dev);
737 __netdev_watchdog_up(dev);
742 * Network interface message level settings
744 #define HAVE_NETIF_MSG 1
747 NETIF_MSG_DRV = 0x0001,
748 NETIF_MSG_PROBE = 0x0002,
749 NETIF_MSG_LINK = 0x0004,
750 NETIF_MSG_TIMER = 0x0008,
751 NETIF_MSG_IFDOWN = 0x0010,
752 NETIF_MSG_IFUP = 0x0020,
753 NETIF_MSG_RX_ERR = 0x0040,
754 NETIF_MSG_TX_ERR = 0x0080,
755 NETIF_MSG_TX_QUEUED = 0x0100,
756 NETIF_MSG_INTR = 0x0200,
757 NETIF_MSG_TX_DONE = 0x0400,
758 NETIF_MSG_RX_STATUS = 0x0800,
759 NETIF_MSG_PKTDATA = 0x1000,
760 NETIF_MSG_HW = 0x2000,
761 NETIF_MSG_WOL = 0x4000,
764 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
765 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
766 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
767 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
768 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
769 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
770 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
771 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
772 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
773 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
774 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
775 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
776 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
777 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
778 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
780 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
783 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
784 return default_msg_enable_bits;
785 if (debug_value == 0) /* no output */
788 return (1 << debug_value) - 1;
791 /* Schedule rx intr now? */
793 static inline int netif_rx_schedule_prep(struct net_device *dev)
795 return netif_running(dev) &&
796 !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
799 /* Add interface to tail of rx poll list. This assumes that _prep has
800 * already been called and returned 1.
803 static inline void __netif_rx_schedule(struct net_device *dev)
807 local_irq_save(flags);
809 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
811 dev->quota += dev->weight;
813 dev->quota = dev->weight;
814 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
815 local_irq_restore(flags);
818 /* Try to reschedule poll. Called by irq handler. */
820 static inline void netif_rx_schedule(struct net_device *dev)
822 if (netif_rx_schedule_prep(dev))
823 __netif_rx_schedule(dev);
826 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
827 * Do not inline this?
829 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
831 if (netif_rx_schedule_prep(dev)) {
836 local_irq_save(flags);
837 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
838 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
839 local_irq_restore(flags);
845 /* Remove interface from poll list: it must be in the poll list
846 * on current cpu. This primitive is called by dev->poll(), when
847 * it completes the work. The device cannot be out of poll list at this
848 * moment, it is BUG().
850 static inline void netif_rx_complete(struct net_device *dev)
854 local_irq_save(flags);
855 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
856 list_del(&dev->poll_list);
857 smp_mb__before_clear_bit();
858 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
859 local_irq_restore(flags);
862 static inline void netif_poll_disable(struct net_device *dev)
864 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
866 current->state = TASK_INTERRUPTIBLE;
871 static inline void netif_poll_enable(struct net_device *dev)
873 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
876 /* same as netif_rx_complete, except that local_irq_save(flags)
877 * has already been issued
879 static inline void __netif_rx_complete(struct net_device *dev)
881 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
882 list_del(&dev->poll_list);
883 smp_mb__before_clear_bit();
884 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
887 static inline void netif_tx_disable(struct net_device *dev)
889 spin_lock_bh(&dev->xmit_lock);
890 netif_stop_queue(dev);
891 spin_unlock_bh(&dev->xmit_lock);
894 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
896 extern void ether_setup(struct net_device *dev);
898 /* Support for loadable net-drivers */
899 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
900 void (*setup)(struct net_device *));
901 extern int register_netdev(struct net_device *dev);
902 extern void unregister_netdev(struct net_device *dev);
903 /* Functions used for multicast support */
904 extern void dev_mc_upload(struct net_device *dev);
905 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
906 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
907 extern void dev_mc_discard(struct net_device *dev);
908 extern void dev_set_promiscuity(struct net_device *dev, int inc);
909 extern void dev_set_allmulti(struct net_device *dev, int inc);
910 extern void netdev_state_change(struct net_device *dev);
911 /* Load a device via the kmod */
912 extern void dev_load(const char *name);
913 extern void dev_mcast_init(void);
914 extern int netdev_max_backlog;
916 extern unsigned long netdev_fc_xoff;
917 extern atomic_t netdev_dropping;
918 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
919 extern int skb_checksum_help(struct sk_buff *skb, int inward);
920 /* rx skb timestamps */
921 extern void net_enable_timestamp(void);
922 extern void net_disable_timestamp(void);
925 extern char *net_sysctl_strdup(const char *s);
928 #endif /* __KERNEL__ */
930 #endif /* _LINUX_DEV_H */