2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <Alan.Cox@linux.org>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
33 #include <linux/timer.h>
34 #include <asm/atomic.h>
35 #include <asm/cache.h>
36 #include <asm/byteorder.h>
38 #include <linux/device.h>
39 #include <linux/percpu.h>
40 #include <linux/dmaengine.h>
47 /* source back-compat hooks */
48 #define SET_ETHTOOL_OPS(netdev,ops) \
49 ( (netdev)->ethtool_ops = (ops) )
51 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
52 functions are available. */
53 #define HAVE_FREE_NETDEV /* free_netdev() */
54 #define HAVE_NETDEV_PRIV /* netdev_priv() */
56 #define NET_XMIT_SUCCESS 0
57 #define NET_XMIT_DROP 1 /* skb dropped */
58 #define NET_XMIT_CN 2 /* congestion notification */
59 #define NET_XMIT_POLICED 3 /* skb is shot by police */
60 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
61 (TC use only - dev_queue_xmit
62 returns this as NET_XMIT_SUCCESS) */
64 /* Backlog congestion levels */
65 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
66 #define NET_RX_DROP 1 /* packet dropped */
67 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
68 #define NET_RX_CN_MOD 3 /* Storm on its way! */
69 #define NET_RX_CN_HIGH 4 /* The storm is here */
70 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
72 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
73 * indicates that the device will soon be dropping packets, or already drops
74 * some packets of the same priority; prompting us to send less aggressively. */
75 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
76 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
80 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
82 /* Driver transmit return codes */
83 #define NETDEV_TX_OK 0 /* driver took care of packet */
84 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
85 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
88 * Compute the worst case header length according to the protocols
92 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
93 #define LL_MAX_HEADER 32
95 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
96 #define LL_MAX_HEADER 96
98 #define LL_MAX_HEADER 48
102 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
103 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
104 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
105 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
106 #define MAX_HEADER LL_MAX_HEADER
108 #define MAX_HEADER (LL_MAX_HEADER + 48)
112 * Network device statistics. Akin to the 2.0 ether stats but
113 * with byte counters.
116 struct net_device_stats
118 unsigned long rx_packets; /* total packets received */
119 unsigned long tx_packets; /* total packets transmitted */
120 unsigned long rx_bytes; /* total bytes received */
121 unsigned long tx_bytes; /* total bytes transmitted */
122 unsigned long rx_errors; /* bad packets received */
123 unsigned long tx_errors; /* packet transmit problems */
124 unsigned long rx_dropped; /* no space in linux buffers */
125 unsigned long tx_dropped; /* no space available in linux */
126 unsigned long multicast; /* multicast packets received */
127 unsigned long collisions;
129 /* detailed rx_errors: */
130 unsigned long rx_length_errors;
131 unsigned long rx_over_errors; /* receiver ring buff overflow */
132 unsigned long rx_crc_errors; /* recved pkt with crc error */
133 unsigned long rx_frame_errors; /* recv'd frame alignment error */
134 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
135 unsigned long rx_missed_errors; /* receiver missed packet */
137 /* detailed tx_errors */
138 unsigned long tx_aborted_errors;
139 unsigned long tx_carrier_errors;
140 unsigned long tx_fifo_errors;
141 unsigned long tx_heartbeat_errors;
142 unsigned long tx_window_errors;
145 unsigned long rx_compressed;
146 unsigned long tx_compressed;
150 /* Media selection options. */
163 #include <linux/cache.h>
164 #include <linux/skbuff.h>
170 struct netif_rx_stats
174 unsigned time_squeeze;
175 unsigned cpu_collision;
178 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
182 struct dev_addr_list *next;
183 u8 da_addr[MAX_ADDR_LEN];
190 * We tag multicasts with these structures.
193 #define dev_mc_list dev_addr_list
194 #define dmi_addr da_addr
195 #define dmi_addrlen da_addrlen
196 #define dmi_users da_users
197 #define dmi_gusers da_gusers
201 struct hh_cache *hh_next; /* Next entry */
202 atomic_t hh_refcnt; /* number of users */
204 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
206 * They are mostly read, but hh_refcnt may be changed quite frequently,
207 * incurring cache line ping pongs.
209 __be16 hh_type ____cacheline_aligned_in_smp;
210 /* protocol identifier, f.e ETH_P_IP
211 * NOTE: For VLANs, this will be the
212 * encapuslated type. --BLG
214 u16 hh_len; /* length of header */
215 int (*hh_output)(struct sk_buff *skb);
218 /* cached hardware header; allow for machine alignment needs. */
219 #define HH_DATA_MOD 16
220 #define HH_DATA_OFF(__len) \
221 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
222 #define HH_DATA_ALIGN(__len) \
223 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
224 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
227 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
229 * dev->hard_header_len ? (dev->hard_header_len +
230 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
232 * We could use other alignment values, but we must maintain the
233 * relationship HH alignment <= LL alignment.
235 #define LL_RESERVED_SPACE(dev) \
236 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
237 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
238 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
240 /* These flag bits are private to the generic network queueing
241 * layer, they may not be explicitly referenced by any other
249 __LINK_STATE_PRESENT,
251 __LINK_STATE_NOCARRIER,
252 __LINK_STATE_RX_SCHED,
253 __LINK_STATE_LINKWATCH_PENDING,
254 __LINK_STATE_DORMANT,
255 __LINK_STATE_QDISC_RUNNING,
260 * This structure holds at boot time configured netdevice settings. They
261 * are then used in the device probing.
263 struct netdev_boot_setup {
267 #define NETDEV_BOOT_SETUP_MAX 8
269 extern int __init netdev_boot_setup(char *str);
272 * The DEVICE structure.
273 * Actually, this whole structure is a big mistake. It mixes I/O
274 * data with strictly "high-level" data, and it has to know about
275 * almost every data structure used in the INET module.
277 * FIXME: cleanup struct net_device such that network protocol info
285 * This is the first field of the "visible" part of this structure
286 * (i.e. as seen by users in the "Space.c" file). It is the name
290 /* device name hash chain */
291 struct hlist_node name_hlist;
294 * I/O specific fields
295 * FIXME: Merge these and struct ifmap into one
297 unsigned long mem_end; /* shared mem end */
298 unsigned long mem_start; /* shared mem start */
299 unsigned long base_addr; /* device I/O address */
300 unsigned int irq; /* device IRQ number */
303 * Some hardware also needs these fields, but they are not
304 * part of the usual set specified in Space.c.
307 unsigned char if_port; /* Selectable AUI, TP,..*/
308 unsigned char dma; /* DMA channel */
312 struct list_head dev_list;
314 /* The device initialization function. Called only once. */
315 int (*init)(struct net_device *dev);
317 /* ------- Fields preinitialized in Space.c finish here ------- */
319 /* Net device features */
320 unsigned long features;
321 #define NETIF_F_SG 1 /* Scatter/gather IO. */
322 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
323 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
324 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
325 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
326 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
327 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
328 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
329 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
330 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
331 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
332 #define NETIF_F_GSO 2048 /* Enable software GSO. */
333 #define NETIF_F_LLTX 4096 /* LockLess TX */
335 /* Segmentation offload features */
336 #define NETIF_F_GSO_SHIFT 16
337 #define NETIF_F_GSO_MASK 0xffff0000
338 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
339 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
340 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
341 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
342 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
344 /* List of features with software fallbacks. */
345 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
348 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
349 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
350 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
351 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
353 struct net_device *next_sched;
355 /* Interface index. Unique device identifier */
360 struct net_device_stats* (*get_stats)(struct net_device *dev);
361 struct net_device_stats stats;
363 #ifdef CONFIG_WIRELESS_EXT
364 /* List of functions to handle Wireless Extensions (instead of ioctl).
365 * See <net/iw_handler.h> for details. Jean II */
366 const struct iw_handler_def * wireless_handlers;
367 /* Instance data managed by the core of Wireless Extensions. */
368 struct iw_public_data * wireless_data;
370 const struct ethtool_ops *ethtool_ops;
373 * This marks the end of the "visible" part of the structure. All
374 * fields hereafter are internal to the system, and may change at
375 * will (read: may be cleaned up at will).
379 unsigned int flags; /* interface flags (a la BSD) */
380 unsigned short gflags;
381 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
382 unsigned short padded; /* How much padding added by alloc_netdev() */
384 unsigned char operstate; /* RFC2863 operstate */
385 unsigned char link_mode; /* mapping policy to operstate */
387 unsigned mtu; /* interface MTU value */
388 unsigned short type; /* interface hardware type */
389 unsigned short hard_header_len; /* hardware hdr length */
391 struct net_device *master; /* Pointer to master device of a group,
392 * which this device is member of.
395 /* Interface address info. */
396 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
397 unsigned char addr_len; /* hardware address length */
398 unsigned short dev_id; /* for shared network cards */
400 struct dev_addr_list *mc_list; /* Multicast mac addresses */
401 int mc_count; /* Number of installed mcasts */
406 /* Protocol specific pointers */
408 void *atalk_ptr; /* AppleTalk link */
409 void *ip_ptr; /* IPv4 specific data */
410 void *dn_ptr; /* DECnet specific data */
411 void *ip6_ptr; /* IPv6 specific data */
412 void *ec_ptr; /* Econet specific data */
413 void *ax25_ptr; /* AX.25 specific data */
414 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
415 assign before registering */
418 * Cache line mostly used on receive path (including eth_type_trans())
420 struct list_head poll_list ____cacheline_aligned_in_smp;
421 /* Link to poll list */
423 int (*poll) (struct net_device *dev, int *quota);
426 unsigned long last_rx; /* Time of last Rx */
427 /* Interface address info used in eth_type_trans() */
428 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
429 because most packets are unicast) */
431 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
434 * Cache line mostly used on queue transmit path (qdisc)
436 /* device queue lock */
437 spinlock_t queue_lock ____cacheline_aligned_in_smp;
439 struct Qdisc *qdisc_sleeping;
440 struct list_head qdisc_list;
441 unsigned long tx_queue_len; /* Max frames per queue allowed */
443 /* Partially transmitted GSO packet. */
444 struct sk_buff *gso_skb;
446 /* ingress path synchronizer */
447 spinlock_t ingress_lock;
448 struct Qdisc *qdisc_ingress;
451 * One part is mostly used on xmit path (device)
453 /* hard_start_xmit synchronizer */
454 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
455 /* cpu id of processor entered to hard_start_xmit or -1,
456 if nobody entered there.
459 void *priv; /* pointer to private data */
460 int (*hard_start_xmit) (struct sk_buff *skb,
461 struct net_device *dev);
462 /* These may be needed for future network-power-down code. */
463 unsigned long trans_start; /* Time (in jiffies) of last Tx */
465 int watchdog_timeo; /* used by dev_watchdog() */
466 struct timer_list watchdog_timer;
469 * refcnt is a very hot point, so align it on SMP
471 /* Number of references to this device */
472 atomic_t refcnt ____cacheline_aligned_in_smp;
474 /* delayed register/unregister */
475 struct list_head todo_list;
476 /* device index hash chain */
477 struct hlist_node index_hlist;
479 struct net_device *link_watch_next;
481 /* register/unregister state machine */
482 enum { NETREG_UNINITIALIZED=0,
483 NETREG_REGISTERED, /* completed register_netdevice */
484 NETREG_UNREGISTERING, /* called unregister_netdevice */
485 NETREG_UNREGISTERED, /* completed unregister todo */
486 NETREG_RELEASED, /* called free_netdev */
489 /* Called after device is detached from network. */
490 void (*uninit)(struct net_device *dev);
491 /* Called after last user reference disappears. */
492 void (*destructor)(struct net_device *dev);
494 /* Pointers to interface service routines. */
495 int (*open)(struct net_device *dev);
496 int (*stop)(struct net_device *dev);
497 #define HAVE_NETDEV_POLL
498 int (*hard_header) (struct sk_buff *skb,
499 struct net_device *dev,
504 int (*rebuild_header)(struct sk_buff *skb);
505 #define HAVE_MULTICAST
506 void (*set_multicast_list)(struct net_device *dev);
507 #define HAVE_SET_MAC_ADDR
508 int (*set_mac_address)(struct net_device *dev,
510 #define HAVE_PRIVATE_IOCTL
511 int (*do_ioctl)(struct net_device *dev,
512 struct ifreq *ifr, int cmd);
513 #define HAVE_SET_CONFIG
514 int (*set_config)(struct net_device *dev,
516 #define HAVE_HEADER_CACHE
517 int (*hard_header_cache)(struct neighbour *neigh,
518 struct hh_cache *hh);
519 void (*header_cache_update)(struct hh_cache *hh,
520 struct net_device *dev,
521 unsigned char * haddr);
522 #define HAVE_CHANGE_MTU
523 int (*change_mtu)(struct net_device *dev, int new_mtu);
525 #define HAVE_TX_TIMEOUT
526 void (*tx_timeout) (struct net_device *dev);
528 void (*vlan_rx_register)(struct net_device *dev,
529 struct vlan_group *grp);
530 void (*vlan_rx_add_vid)(struct net_device *dev,
532 void (*vlan_rx_kill_vid)(struct net_device *dev,
535 int (*hard_header_parse)(struct sk_buff *skb,
536 unsigned char *haddr);
537 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
538 #ifdef CONFIG_NETPOLL
539 struct netpoll_info *npinfo;
541 #ifdef CONFIG_NET_POLL_CONTROLLER
542 void (*poll_controller)(struct net_device *dev);
546 struct net_bridge_port *br_port;
548 /* class/net/name entry */
550 /* space for optional statistics and wireless sysfs groups */
551 struct attribute_group *sysfs_groups[3];
553 /* rtnetlink link ops */
554 const struct rtnl_link_ops *rtnl_link_ops;
556 #define to_net_dev(d) container_of(d, struct net_device, dev)
558 #define NETDEV_ALIGN 32
559 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
561 static inline void *netdev_priv(const struct net_device *dev)
563 return (char *)dev + ((sizeof(struct net_device)
564 + NETDEV_ALIGN_CONST)
565 & ~NETDEV_ALIGN_CONST);
568 #define SET_MODULE_OWNER(dev) do { } while (0)
569 /* Set the sysfs physical device reference for the network logical device
570 * if set prior to registration will cause a symlink during initialization.
572 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
575 __be16 type; /* This is really htons(ether_type). */
576 struct net_device *dev; /* NULL is wildcarded here */
577 int (*func) (struct sk_buff *,
579 struct packet_type *,
580 struct net_device *);
581 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
583 int (*gso_send_check)(struct sk_buff *skb);
584 void *af_packet_priv;
585 struct list_head list;
588 #include <linux/interrupt.h>
589 #include <linux/notifier.h>
591 extern struct net_device loopback_dev; /* The loopback */
592 extern struct list_head dev_base_head; /* All devices */
593 extern rwlock_t dev_base_lock; /* Device list lock */
595 #define for_each_netdev(d) \
596 list_for_each_entry(d, &dev_base_head, dev_list)
597 #define for_each_netdev_safe(d, n) \
598 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
599 #define for_each_netdev_continue(d) \
600 list_for_each_entry_continue(d, &dev_base_head, dev_list)
601 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
603 static inline struct net_device *next_net_device(struct net_device *dev)
605 struct list_head *lh;
607 lh = dev->dev_list.next;
608 return lh == &dev_base_head ? NULL : net_device_entry(lh);
611 static inline struct net_device *first_net_device(void)
613 return list_empty(&dev_base_head) ? NULL :
614 net_device_entry(dev_base_head.next);
617 extern int netdev_boot_setup_check(struct net_device *dev);
618 extern unsigned long netdev_boot_base(const char *prefix, int unit);
619 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
620 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
621 extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
622 extern void dev_add_pack(struct packet_type *pt);
623 extern void dev_remove_pack(struct packet_type *pt);
624 extern void __dev_remove_pack(struct packet_type *pt);
626 extern struct net_device *dev_get_by_flags(unsigned short flags,
627 unsigned short mask);
628 extern struct net_device *dev_get_by_name(const char *name);
629 extern struct net_device *__dev_get_by_name(const char *name);
630 extern int dev_alloc_name(struct net_device *dev, const char *name);
631 extern int dev_open(struct net_device *dev);
632 extern int dev_close(struct net_device *dev);
633 extern int dev_queue_xmit(struct sk_buff *skb);
634 extern int register_netdevice(struct net_device *dev);
635 extern void unregister_netdevice(struct net_device *dev);
636 extern void free_netdev(struct net_device *dev);
637 extern void synchronize_net(void);
638 extern int register_netdevice_notifier(struct notifier_block *nb);
639 extern int unregister_netdevice_notifier(struct notifier_block *nb);
640 extern int call_netdevice_notifiers(unsigned long val, void *v);
641 extern struct net_device *dev_get_by_index(int ifindex);
642 extern struct net_device *__dev_get_by_index(int ifindex);
643 extern int dev_restart(struct net_device *dev);
644 #ifdef CONFIG_NETPOLL_TRAP
645 extern int netpoll_trap(void);
648 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
649 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
650 static inline int unregister_gifconf(unsigned int family)
652 return register_gifconf(family, NULL);
656 * Incoming packets are placed on per-cpu queues so that
657 * no locking is needed.
662 struct net_device *output_queue;
663 struct sk_buff_head input_pkt_queue;
664 struct list_head poll_list;
665 struct sk_buff *completion_queue;
667 struct net_device backlog_dev; /* Sorry. 8) */
668 #ifdef CONFIG_NET_DMA
669 struct dma_chan *net_dma;
673 DECLARE_PER_CPU(struct softnet_data,softnet_data);
675 #define HAVE_NETIF_QUEUE
677 extern void __netif_schedule(struct net_device *dev);
679 static inline void netif_schedule(struct net_device *dev)
681 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
682 __netif_schedule(dev);
685 static inline void netif_start_queue(struct net_device *dev)
687 clear_bit(__LINK_STATE_XOFF, &dev->state);
690 static inline void netif_wake_queue(struct net_device *dev)
692 #ifdef CONFIG_NETPOLL_TRAP
693 if (netpoll_trap()) {
694 clear_bit(__LINK_STATE_XOFF, &dev->state);
698 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
699 __netif_schedule(dev);
702 static inline void netif_stop_queue(struct net_device *dev)
704 set_bit(__LINK_STATE_XOFF, &dev->state);
707 static inline int netif_queue_stopped(const struct net_device *dev)
709 return test_bit(__LINK_STATE_XOFF, &dev->state);
712 static inline int netif_running(const struct net_device *dev)
714 return test_bit(__LINK_STATE_START, &dev->state);
718 /* Use this variant when it is known for sure that it
719 * is executing from interrupt context.
721 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
723 if (atomic_dec_and_test(&skb->users)) {
724 struct softnet_data *sd;
727 local_irq_save(flags);
728 sd = &__get_cpu_var(softnet_data);
729 skb->next = sd->completion_queue;
730 sd->completion_queue = skb;
731 raise_softirq_irqoff(NET_TX_SOFTIRQ);
732 local_irq_restore(flags);
736 /* Use this variant in places where it could be invoked
737 * either from interrupt or non-interrupt context.
739 extern void dev_kfree_skb_any(struct sk_buff *skb);
741 #define HAVE_NETIF_RX 1
742 extern int netif_rx(struct sk_buff *skb);
743 extern int netif_rx_ni(struct sk_buff *skb);
744 #define HAVE_NETIF_RECEIVE_SKB 1
745 extern int netif_receive_skb(struct sk_buff *skb);
746 extern int dev_valid_name(const char *name);
747 extern int dev_ioctl(unsigned int cmd, void __user *);
748 extern int dev_ethtool(struct ifreq *);
749 extern unsigned dev_get_flags(const struct net_device *);
750 extern int dev_change_flags(struct net_device *, unsigned);
751 extern int dev_change_name(struct net_device *, char *);
752 extern int dev_set_mtu(struct net_device *, int);
753 extern int dev_set_mac_address(struct net_device *,
755 extern int dev_hard_start_xmit(struct sk_buff *skb,
756 struct net_device *dev);
758 extern void dev_init(void);
760 extern int netdev_budget;
762 /* Called by rtnetlink.c:rtnl_unlock() */
763 extern void netdev_run_todo(void);
765 static inline void dev_put(struct net_device *dev)
767 atomic_dec(&dev->refcnt);
770 static inline void dev_hold(struct net_device *dev)
772 atomic_inc(&dev->refcnt);
775 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
776 * and _off may be called from IRQ context, but it is caller
777 * who is responsible for serialization of these calls.
779 * The name carrier is inappropriate, these functions should really be
780 * called netif_lowerlayer_*() because they represent the state of any
781 * kind of lower layer not just hardware media.
784 extern void linkwatch_fire_event(struct net_device *dev);
786 static inline int netif_carrier_ok(const struct net_device *dev)
788 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
791 extern void __netdev_watchdog_up(struct net_device *dev);
793 extern void netif_carrier_on(struct net_device *dev);
795 extern void netif_carrier_off(struct net_device *dev);
797 static inline void netif_dormant_on(struct net_device *dev)
799 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
800 linkwatch_fire_event(dev);
803 static inline void netif_dormant_off(struct net_device *dev)
805 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
806 linkwatch_fire_event(dev);
809 static inline int netif_dormant(const struct net_device *dev)
811 return test_bit(__LINK_STATE_DORMANT, &dev->state);
815 static inline int netif_oper_up(const struct net_device *dev) {
816 return (dev->operstate == IF_OPER_UP ||
817 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
821 static inline int netif_device_present(struct net_device *dev)
823 return test_bit(__LINK_STATE_PRESENT, &dev->state);
826 extern void netif_device_detach(struct net_device *dev);
828 extern void netif_device_attach(struct net_device *dev);
831 * Network interface message level settings
833 #define HAVE_NETIF_MSG 1
836 NETIF_MSG_DRV = 0x0001,
837 NETIF_MSG_PROBE = 0x0002,
838 NETIF_MSG_LINK = 0x0004,
839 NETIF_MSG_TIMER = 0x0008,
840 NETIF_MSG_IFDOWN = 0x0010,
841 NETIF_MSG_IFUP = 0x0020,
842 NETIF_MSG_RX_ERR = 0x0040,
843 NETIF_MSG_TX_ERR = 0x0080,
844 NETIF_MSG_TX_QUEUED = 0x0100,
845 NETIF_MSG_INTR = 0x0200,
846 NETIF_MSG_TX_DONE = 0x0400,
847 NETIF_MSG_RX_STATUS = 0x0800,
848 NETIF_MSG_PKTDATA = 0x1000,
849 NETIF_MSG_HW = 0x2000,
850 NETIF_MSG_WOL = 0x4000,
853 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
854 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
855 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
856 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
857 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
858 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
859 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
860 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
861 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
862 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
863 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
864 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
865 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
866 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
867 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
869 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
872 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
873 return default_msg_enable_bits;
874 if (debug_value == 0) /* no output */
877 return (1 << debug_value) - 1;
880 /* Test if receive needs to be scheduled */
881 static inline int __netif_rx_schedule_prep(struct net_device *dev)
883 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
886 /* Test if receive needs to be scheduled but only if up */
887 static inline int netif_rx_schedule_prep(struct net_device *dev)
889 return netif_running(dev) && __netif_rx_schedule_prep(dev);
892 /* Add interface to tail of rx poll list. This assumes that _prep has
893 * already been called and returned 1.
896 extern void __netif_rx_schedule(struct net_device *dev);
898 /* Try to reschedule poll. Called by irq handler. */
900 static inline void netif_rx_schedule(struct net_device *dev)
902 if (netif_rx_schedule_prep(dev))
903 __netif_rx_schedule(dev);
906 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
907 * Do not inline this?
909 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
911 if (netif_rx_schedule_prep(dev)) {
916 local_irq_save(flags);
917 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
918 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
919 local_irq_restore(flags);
925 /* same as netif_rx_complete, except that local_irq_save(flags)
926 * has already been issued
928 static inline void __netif_rx_complete(struct net_device *dev)
930 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
931 list_del(&dev->poll_list);
932 smp_mb__before_clear_bit();
933 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
936 /* Remove interface from poll list: it must be in the poll list
937 * on current cpu. This primitive is called by dev->poll(), when
938 * it completes the work. The device cannot be out of poll list at this
939 * moment, it is BUG().
941 static inline void netif_rx_complete(struct net_device *dev)
945 local_irq_save(flags);
946 __netif_rx_complete(dev);
947 local_irq_restore(flags);
950 static inline void netif_poll_disable(struct net_device *dev)
952 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
954 schedule_timeout_interruptible(1);
957 static inline void netif_poll_enable(struct net_device *dev)
959 smp_mb__before_clear_bit();
960 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
963 static inline void netif_tx_lock(struct net_device *dev)
965 spin_lock(&dev->_xmit_lock);
966 dev->xmit_lock_owner = smp_processor_id();
969 static inline void netif_tx_lock_bh(struct net_device *dev)
971 spin_lock_bh(&dev->_xmit_lock);
972 dev->xmit_lock_owner = smp_processor_id();
975 static inline int netif_tx_trylock(struct net_device *dev)
977 int ok = spin_trylock(&dev->_xmit_lock);
979 dev->xmit_lock_owner = smp_processor_id();
983 static inline void netif_tx_unlock(struct net_device *dev)
985 dev->xmit_lock_owner = -1;
986 spin_unlock(&dev->_xmit_lock);
989 static inline void netif_tx_unlock_bh(struct net_device *dev)
991 dev->xmit_lock_owner = -1;
992 spin_unlock_bh(&dev->_xmit_lock);
995 static inline void netif_tx_disable(struct net_device *dev)
997 netif_tx_lock_bh(dev);
998 netif_stop_queue(dev);
999 netif_tx_unlock_bh(dev);
1002 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1004 extern void ether_setup(struct net_device *dev);
1006 /* Support for loadable net-drivers */
1007 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
1008 void (*setup)(struct net_device *));
1009 extern int register_netdev(struct net_device *dev);
1010 extern void unregister_netdev(struct net_device *dev);
1011 /* Functions used for multicast support */
1012 extern void dev_mc_upload(struct net_device *dev);
1013 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1014 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1015 extern void dev_mc_discard(struct net_device *dev);
1016 extern int __dev_addr_delete(struct dev_addr_list **list, void *addr, int alen, int all);
1017 extern int __dev_addr_add(struct dev_addr_list **list, void *addr, int alen, int newonly);
1018 extern void __dev_addr_discard(struct dev_addr_list **list);
1019 extern void dev_set_promiscuity(struct net_device *dev, int inc);
1020 extern void dev_set_allmulti(struct net_device *dev, int inc);
1021 extern void netdev_state_change(struct net_device *dev);
1022 extern void netdev_features_change(struct net_device *dev);
1023 /* Load a device via the kmod */
1024 extern void dev_load(const char *name);
1025 extern void dev_mcast_init(void);
1026 extern int netdev_max_backlog;
1027 extern int weight_p;
1028 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1029 extern int skb_checksum_help(struct sk_buff *skb);
1030 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1032 extern void netdev_rx_csum_fault(struct net_device *dev);
1034 static inline void netdev_rx_csum_fault(struct net_device *dev)
1038 /* rx skb timestamps */
1039 extern void net_enable_timestamp(void);
1040 extern void net_disable_timestamp(void);
1042 #ifdef CONFIG_PROC_FS
1043 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1044 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1045 extern void dev_seq_stop(struct seq_file *seq, void *v);
1048 extern void linkwatch_run_queue(void);
1050 static inline int net_gso_ok(int features, int gso_type)
1052 int feature = gso_type << NETIF_F_GSO_SHIFT;
1053 return (features & feature) == feature;
1056 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1058 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1061 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1063 return skb_is_gso(skb) &&
1064 (!skb_gso_ok(skb, dev->features) ||
1065 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1068 /* On bonding slaves other than the currently active slave, suppress
1069 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1070 * ARP on active-backup slaves with arp_validate enabled.
1072 static inline int skb_bond_should_drop(struct sk_buff *skb)
1074 struct net_device *dev = skb->dev;
1075 struct net_device *master = dev->master;
1078 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1079 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1080 skb->protocol == __constant_htons(ETH_P_ARP))
1083 if (master->priv_flags & IFF_MASTER_ALB) {
1084 if (skb->pkt_type != PACKET_BROADCAST &&
1085 skb->pkt_type != PACKET_MULTICAST)
1088 if (master->priv_flags & IFF_MASTER_8023AD &&
1089 skb->protocol == __constant_htons(ETH_P_SLOW))
1097 #endif /* __KERNEL__ */
1099 #endif /* _LINUX_DEV_H */