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,
235 __LINK_STATE_QDISC_RUNNING,
240 * This structure holds at boot time configured netdevice settings. They
241 * are then used in the device probing.
243 struct netdev_boot_setup {
247 #define NETDEV_BOOT_SETUP_MAX 8
249 extern int __init netdev_boot_setup(char *str);
252 * The DEVICE structure.
253 * Actually, this whole structure is a big mistake. It mixes I/O
254 * data with strictly "high-level" data, and it has to know about
255 * almost every data structure used in the INET module.
257 * FIXME: cleanup struct net_device such that network protocol info
265 * This is the first field of the "visible" part of this structure
266 * (i.e. as seen by users in the "Space.c" file). It is the name
270 /* device name hash chain */
271 struct hlist_node name_hlist;
274 * I/O specific fields
275 * FIXME: Merge these and struct ifmap into one
277 unsigned long mem_end; /* shared mem end */
278 unsigned long mem_start; /* shared mem start */
279 unsigned long base_addr; /* device I/O address */
280 unsigned int irq; /* device IRQ number */
283 * Some hardware also needs these fields, but they are not
284 * part of the usual set specified in Space.c.
287 unsigned char if_port; /* Selectable AUI, TP,..*/
288 unsigned char dma; /* DMA channel */
292 struct net_device *next;
294 /* The device initialization function. Called only once. */
295 int (*init)(struct net_device *dev);
297 /* ------- Fields preinitialized in Space.c finish here ------- */
299 /* Net device features */
300 unsigned long features;
301 #define NETIF_F_SG 1 /* Scatter/gather IO. */
302 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
303 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
304 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
305 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
306 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
307 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
308 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
309 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
310 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
311 #define NETIF_F_GSO 2048 /* Enable software GSO. */
312 #define NETIF_F_LLTX 4096 /* LockLess TX */
314 /* Segmentation offload features */
315 #define NETIF_F_GSO_SHIFT 16
316 #define NETIF_F_GSO_MASK 0xffff0000
317 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
318 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
319 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
320 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
321 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
323 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
324 #define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
326 struct net_device *next_sched;
328 /* Interface index. Unique device identifier */
333 struct net_device_stats* (*get_stats)(struct net_device *dev);
334 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
336 /* List of functions to handle Wireless Extensions (instead of ioctl).
337 * See <net/iw_handler.h> for details. Jean II */
338 const struct iw_handler_def * wireless_handlers;
339 /* Instance data managed by the core of Wireless Extensions. */
340 struct iw_public_data * wireless_data;
342 struct ethtool_ops *ethtool_ops;
345 * This marks the end of the "visible" part of the structure. All
346 * fields hereafter are internal to the system, and may change at
347 * will (read: may be cleaned up at will).
351 unsigned int flags; /* interface flags (a la BSD) */
352 unsigned short gflags;
353 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
354 unsigned short padded; /* How much padding added by alloc_netdev() */
356 unsigned char operstate; /* RFC2863 operstate */
357 unsigned char link_mode; /* mapping policy to operstate */
359 unsigned mtu; /* interface MTU value */
360 unsigned short type; /* interface hardware type */
361 unsigned short hard_header_len; /* hardware hdr length */
363 struct net_device *master; /* Pointer to master device of a group,
364 * which this device is member of.
367 /* Interface address info. */
368 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
369 unsigned char addr_len; /* hardware address length */
370 unsigned short dev_id; /* for shared network cards */
372 struct dev_mc_list *mc_list; /* Multicast mac addresses */
373 int mc_count; /* Number of installed mcasts */
378 /* Protocol specific pointers */
380 void *atalk_ptr; /* AppleTalk link */
381 void *ip_ptr; /* IPv4 specific data */
382 void *dn_ptr; /* DECnet specific data */
383 void *ip6_ptr; /* IPv6 specific data */
384 void *ec_ptr; /* Econet specific data */
385 void *ax25_ptr; /* AX.25 specific data */
388 * Cache line mostly used on receive path (including eth_type_trans())
390 struct list_head poll_list ____cacheline_aligned_in_smp;
391 /* Link to poll list */
393 int (*poll) (struct net_device *dev, int *quota);
396 unsigned long last_rx; /* Time of last Rx */
397 /* Interface address info used in eth_type_trans() */
398 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
399 because most packets are unicast) */
401 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
404 * Cache line mostly used on queue transmit path (qdisc)
406 /* device queue lock */
407 spinlock_t queue_lock ____cacheline_aligned_in_smp;
409 struct Qdisc *qdisc_sleeping;
410 struct list_head qdisc_list;
411 unsigned long tx_queue_len; /* Max frames per queue allowed */
413 /* Partially transmitted GSO packet. */
414 struct sk_buff *gso_skb;
416 /* ingress path synchronizer */
417 spinlock_t ingress_lock;
418 struct Qdisc *qdisc_ingress;
421 * One part is mostly used on xmit path (device)
423 /* hard_start_xmit synchronizer */
424 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
425 /* cpu id of processor entered to hard_start_xmit or -1,
426 if nobody entered there.
429 void *priv; /* pointer to private data */
430 int (*hard_start_xmit) (struct sk_buff *skb,
431 struct net_device *dev);
432 /* These may be needed for future network-power-down code. */
433 unsigned long trans_start; /* Time (in jiffies) of last Tx */
435 int watchdog_timeo; /* used by dev_watchdog() */
436 struct timer_list watchdog_timer;
439 * refcnt is a very hot point, so align it on SMP
441 /* Number of references to this device */
442 atomic_t refcnt ____cacheline_aligned_in_smp;
444 /* delayed register/unregister */
445 struct list_head todo_list;
446 /* device index hash chain */
447 struct hlist_node index_hlist;
449 /* register/unregister state machine */
450 enum { NETREG_UNINITIALIZED=0,
451 NETREG_REGISTERED, /* completed register_netdevice */
452 NETREG_UNREGISTERING, /* called unregister_netdevice */
453 NETREG_UNREGISTERED, /* completed unregister todo */
454 NETREG_RELEASED, /* called free_netdev */
457 /* Called after device is detached from network. */
458 void (*uninit)(struct net_device *dev);
459 /* Called after last user reference disappears. */
460 void (*destructor)(struct net_device *dev);
462 /* Pointers to interface service routines. */
463 int (*open)(struct net_device *dev);
464 int (*stop)(struct net_device *dev);
465 #define HAVE_NETDEV_POLL
466 int (*hard_header) (struct sk_buff *skb,
467 struct net_device *dev,
472 int (*rebuild_header)(struct sk_buff *skb);
473 #define HAVE_MULTICAST
474 void (*set_multicast_list)(struct net_device *dev);
475 #define HAVE_SET_MAC_ADDR
476 int (*set_mac_address)(struct net_device *dev,
478 #define HAVE_PRIVATE_IOCTL
479 int (*do_ioctl)(struct net_device *dev,
480 struct ifreq *ifr, int cmd);
481 #define HAVE_SET_CONFIG
482 int (*set_config)(struct net_device *dev,
484 #define HAVE_HEADER_CACHE
485 int (*hard_header_cache)(struct neighbour *neigh,
486 struct hh_cache *hh);
487 void (*header_cache_update)(struct hh_cache *hh,
488 struct net_device *dev,
489 unsigned char * haddr);
490 #define HAVE_CHANGE_MTU
491 int (*change_mtu)(struct net_device *dev, int new_mtu);
493 #define HAVE_TX_TIMEOUT
494 void (*tx_timeout) (struct net_device *dev);
496 void (*vlan_rx_register)(struct net_device *dev,
497 struct vlan_group *grp);
498 void (*vlan_rx_add_vid)(struct net_device *dev,
500 void (*vlan_rx_kill_vid)(struct net_device *dev,
503 int (*hard_header_parse)(struct sk_buff *skb,
504 unsigned char *haddr);
505 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
506 #ifdef CONFIG_NETPOLL
507 struct netpoll_info *npinfo;
509 #ifdef CONFIG_NET_POLL_CONTROLLER
510 void (*poll_controller)(struct net_device *dev);
514 struct net_bridge_port *br_port;
516 #ifdef CONFIG_NET_DIVERT
517 /* this will get initialized at each interface type init routine */
518 struct divert_blk *divert;
519 #endif /* CONFIG_NET_DIVERT */
521 /* class/net/name entry */
522 struct class_device class_dev;
523 /* space for optional statistics and wireless sysfs groups */
524 struct attribute_group *sysfs_groups[3];
527 #define NETDEV_ALIGN 32
528 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
530 static inline void *netdev_priv(struct net_device *dev)
532 return (char *)dev + ((sizeof(struct net_device)
533 + NETDEV_ALIGN_CONST)
534 & ~NETDEV_ALIGN_CONST);
537 #define SET_MODULE_OWNER(dev) do { } while (0)
538 /* Set the sysfs physical device reference for the network logical device
539 * if set prior to registration will cause a symlink during initialization.
541 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
544 __be16 type; /* This is really htons(ether_type). */
545 struct net_device *dev; /* NULL is wildcarded here */
546 int (*func) (struct sk_buff *,
548 struct packet_type *,
549 struct net_device *);
550 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
552 void *af_packet_priv;
553 struct list_head list;
556 #include <linux/interrupt.h>
557 #include <linux/notifier.h>
559 extern struct net_device loopback_dev; /* The loopback */
560 extern struct net_device *dev_base; /* All devices */
561 extern rwlock_t dev_base_lock; /* Device list lock */
563 extern int netdev_boot_setup_check(struct net_device *dev);
564 extern unsigned long netdev_boot_base(const char *prefix, int unit);
565 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
566 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
567 extern void dev_add_pack(struct packet_type *pt);
568 extern void dev_remove_pack(struct packet_type *pt);
569 extern void __dev_remove_pack(struct packet_type *pt);
571 extern struct net_device *dev_get_by_flags(unsigned short flags,
572 unsigned short mask);
573 extern struct net_device *dev_get_by_name(const char *name);
574 extern struct net_device *__dev_get_by_name(const char *name);
575 extern int dev_alloc_name(struct net_device *dev, const char *name);
576 extern int dev_open(struct net_device *dev);
577 extern int dev_close(struct net_device *dev);
578 extern int dev_queue_xmit(struct sk_buff *skb);
579 extern int register_netdevice(struct net_device *dev);
580 extern int unregister_netdevice(struct net_device *dev);
581 extern void free_netdev(struct net_device *dev);
582 extern void synchronize_net(void);
583 extern int register_netdevice_notifier(struct notifier_block *nb);
584 extern int unregister_netdevice_notifier(struct notifier_block *nb);
585 extern int call_netdevice_notifiers(unsigned long val, void *v);
586 extern struct net_device *dev_get_by_index(int ifindex);
587 extern struct net_device *__dev_get_by_index(int ifindex);
588 extern int dev_restart(struct net_device *dev);
589 #ifdef CONFIG_NETPOLL_TRAP
590 extern int netpoll_trap(void);
593 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
594 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
595 static inline int unregister_gifconf(unsigned int family)
597 return register_gifconf(family, NULL);
601 * Incoming packets are placed on per-cpu queues so that
602 * no locking is needed.
607 struct net_device *output_queue;
608 struct sk_buff_head input_pkt_queue;
609 struct list_head poll_list;
610 struct sk_buff *completion_queue;
612 struct net_device backlog_dev; /* Sorry. 8) */
613 #ifdef CONFIG_NET_DMA
614 struct dma_chan *net_dma;
618 DECLARE_PER_CPU(struct softnet_data,softnet_data);
620 #define HAVE_NETIF_QUEUE
622 extern void __netif_schedule(struct net_device *dev);
624 static inline void netif_schedule(struct net_device *dev)
626 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
627 __netif_schedule(dev);
630 static inline void netif_start_queue(struct net_device *dev)
632 clear_bit(__LINK_STATE_XOFF, &dev->state);
635 static inline void netif_wake_queue(struct net_device *dev)
637 #ifdef CONFIG_NETPOLL_TRAP
641 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
642 __netif_schedule(dev);
645 static inline void netif_stop_queue(struct net_device *dev)
647 #ifdef CONFIG_NETPOLL_TRAP
651 set_bit(__LINK_STATE_XOFF, &dev->state);
654 static inline int netif_queue_stopped(const struct net_device *dev)
656 return test_bit(__LINK_STATE_XOFF, &dev->state);
659 static inline int netif_running(const struct net_device *dev)
661 return test_bit(__LINK_STATE_START, &dev->state);
665 /* Use this variant when it is known for sure that it
666 * is executing from interrupt context.
668 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
670 if (atomic_dec_and_test(&skb->users)) {
671 struct softnet_data *sd;
674 local_irq_save(flags);
675 sd = &__get_cpu_var(softnet_data);
676 skb->next = sd->completion_queue;
677 sd->completion_queue = skb;
678 raise_softirq_irqoff(NET_TX_SOFTIRQ);
679 local_irq_restore(flags);
683 /* Use this variant in places where it could be invoked
684 * either from interrupt or non-interrupt context.
686 extern void dev_kfree_skb_any(struct sk_buff *skb);
688 #define HAVE_NETIF_RX 1
689 extern int netif_rx(struct sk_buff *skb);
690 extern int netif_rx_ni(struct sk_buff *skb);
691 #define HAVE_NETIF_RECEIVE_SKB 1
692 extern int netif_receive_skb(struct sk_buff *skb);
693 extern int dev_valid_name(const char *name);
694 extern int dev_ioctl(unsigned int cmd, void __user *);
695 extern int dev_ethtool(struct ifreq *);
696 extern unsigned dev_get_flags(const struct net_device *);
697 extern int dev_change_flags(struct net_device *, unsigned);
698 extern int dev_change_name(struct net_device *, char *);
699 extern int dev_set_mtu(struct net_device *, int);
700 extern int dev_set_mac_address(struct net_device *,
702 extern int dev_hard_start_xmit(struct sk_buff *skb,
703 struct net_device *dev);
705 extern void dev_init(void);
707 extern int netdev_budget;
709 /* Called by rtnetlink.c:rtnl_unlock() */
710 extern void netdev_run_todo(void);
712 static inline void dev_put(struct net_device *dev)
714 atomic_dec(&dev->refcnt);
717 static inline void dev_hold(struct net_device *dev)
719 atomic_inc(&dev->refcnt);
722 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
723 * and _off may be called from IRQ context, but it is caller
724 * who is responsible for serialization of these calls.
726 * The name carrier is inappropriate, these functions should really be
727 * called netif_lowerlayer_*() because they represent the state of any
728 * kind of lower layer not just hardware media.
731 extern void linkwatch_fire_event(struct net_device *dev);
733 static inline int netif_carrier_ok(const struct net_device *dev)
735 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
738 extern void __netdev_watchdog_up(struct net_device *dev);
740 extern void netif_carrier_on(struct net_device *dev);
742 extern void netif_carrier_off(struct net_device *dev);
744 static inline void netif_dormant_on(struct net_device *dev)
746 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
747 linkwatch_fire_event(dev);
750 static inline void netif_dormant_off(struct net_device *dev)
752 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
753 linkwatch_fire_event(dev);
756 static inline int netif_dormant(const struct net_device *dev)
758 return test_bit(__LINK_STATE_DORMANT, &dev->state);
762 static inline int netif_oper_up(const struct net_device *dev) {
763 return (dev->operstate == IF_OPER_UP ||
764 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
768 static inline int netif_device_present(struct net_device *dev)
770 return test_bit(__LINK_STATE_PRESENT, &dev->state);
773 extern void netif_device_detach(struct net_device *dev);
775 extern void netif_device_attach(struct net_device *dev);
778 * Network interface message level settings
780 #define HAVE_NETIF_MSG 1
783 NETIF_MSG_DRV = 0x0001,
784 NETIF_MSG_PROBE = 0x0002,
785 NETIF_MSG_LINK = 0x0004,
786 NETIF_MSG_TIMER = 0x0008,
787 NETIF_MSG_IFDOWN = 0x0010,
788 NETIF_MSG_IFUP = 0x0020,
789 NETIF_MSG_RX_ERR = 0x0040,
790 NETIF_MSG_TX_ERR = 0x0080,
791 NETIF_MSG_TX_QUEUED = 0x0100,
792 NETIF_MSG_INTR = 0x0200,
793 NETIF_MSG_TX_DONE = 0x0400,
794 NETIF_MSG_RX_STATUS = 0x0800,
795 NETIF_MSG_PKTDATA = 0x1000,
796 NETIF_MSG_HW = 0x2000,
797 NETIF_MSG_WOL = 0x4000,
800 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
801 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
802 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
803 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
804 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
805 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
806 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
807 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
808 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
809 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
810 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
811 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
812 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
813 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
814 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
816 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
819 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
820 return default_msg_enable_bits;
821 if (debug_value == 0) /* no output */
824 return (1 << debug_value) - 1;
827 /* Test if receive needs to be scheduled */
828 static inline int __netif_rx_schedule_prep(struct net_device *dev)
830 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
833 /* Test if receive needs to be scheduled but only if up */
834 static inline int netif_rx_schedule_prep(struct net_device *dev)
836 return netif_running(dev) && __netif_rx_schedule_prep(dev);
839 /* Add interface to tail of rx poll list. This assumes that _prep has
840 * already been called and returned 1.
843 extern void __netif_rx_schedule(struct net_device *dev);
845 /* Try to reschedule poll. Called by irq handler. */
847 static inline void netif_rx_schedule(struct net_device *dev)
849 if (netif_rx_schedule_prep(dev))
850 __netif_rx_schedule(dev);
853 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
854 * Do not inline this?
856 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
858 if (netif_rx_schedule_prep(dev)) {
863 local_irq_save(flags);
864 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
865 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
866 local_irq_restore(flags);
872 /* Remove interface from poll list: it must be in the poll list
873 * on current cpu. This primitive is called by dev->poll(), when
874 * it completes the work. The device cannot be out of poll list at this
875 * moment, it is BUG().
877 static inline void netif_rx_complete(struct net_device *dev)
881 local_irq_save(flags);
882 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
883 list_del(&dev->poll_list);
884 smp_mb__before_clear_bit();
885 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
886 local_irq_restore(flags);
889 static inline void netif_poll_disable(struct net_device *dev)
891 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
893 schedule_timeout_interruptible(1);
896 static inline void netif_poll_enable(struct net_device *dev)
898 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
901 /* same as netif_rx_complete, except that local_irq_save(flags)
902 * has already been issued
904 static inline void __netif_rx_complete(struct net_device *dev)
906 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
907 list_del(&dev->poll_list);
908 smp_mb__before_clear_bit();
909 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
912 static inline void netif_tx_lock(struct net_device *dev)
914 spin_lock(&dev->_xmit_lock);
915 dev->xmit_lock_owner = smp_processor_id();
918 static inline void netif_tx_lock_bh(struct net_device *dev)
920 spin_lock_bh(&dev->_xmit_lock);
921 dev->xmit_lock_owner = smp_processor_id();
924 static inline int netif_tx_trylock(struct net_device *dev)
926 int err = spin_trylock(&dev->_xmit_lock);
928 dev->xmit_lock_owner = smp_processor_id();
932 static inline void netif_tx_unlock(struct net_device *dev)
934 dev->xmit_lock_owner = -1;
935 spin_unlock(&dev->_xmit_lock);
938 static inline void netif_tx_unlock_bh(struct net_device *dev)
940 dev->xmit_lock_owner = -1;
941 spin_unlock_bh(&dev->_xmit_lock);
944 static inline void netif_tx_disable(struct net_device *dev)
946 netif_tx_lock_bh(dev);
947 netif_stop_queue(dev);
948 netif_tx_unlock_bh(dev);
951 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
953 extern void ether_setup(struct net_device *dev);
955 /* Support for loadable net-drivers */
956 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
957 void (*setup)(struct net_device *));
958 extern int register_netdev(struct net_device *dev);
959 extern void unregister_netdev(struct net_device *dev);
960 /* Functions used for multicast support */
961 extern void dev_mc_upload(struct net_device *dev);
962 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
963 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
964 extern void dev_mc_discard(struct net_device *dev);
965 extern void dev_set_promiscuity(struct net_device *dev, int inc);
966 extern void dev_set_allmulti(struct net_device *dev, int inc);
967 extern void netdev_state_change(struct net_device *dev);
968 extern void netdev_features_change(struct net_device *dev);
969 /* Load a device via the kmod */
970 extern void dev_load(const char *name);
971 extern void dev_mcast_init(void);
972 extern int netdev_max_backlog;
974 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
975 extern int skb_checksum_help(struct sk_buff *skb, int inward);
976 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
978 extern void netdev_rx_csum_fault(struct net_device *dev);
980 static inline void netdev_rx_csum_fault(struct net_device *dev)
984 /* rx skb timestamps */
985 extern void net_enable_timestamp(void);
986 extern void net_disable_timestamp(void);
988 #ifdef CONFIG_PROC_FS
989 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
990 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
991 extern void dev_seq_stop(struct seq_file *seq, void *v);
994 extern void linkwatch_run_queue(void);
996 static inline int net_gso_ok(int features, int gso_type)
998 int feature = gso_type << NETIF_F_GSO_SHIFT;
999 return (features & feature) == feature;
1002 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1004 return net_gso_ok(features, skb_shinfo(skb)->gso_size ?
1005 skb_shinfo(skb)->gso_type : 0);
1008 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1010 return !skb_gso_ok(skb, dev->features);
1013 #endif /* __KERNEL__ */
1015 #endif /* _LINUX_DEV_H */