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)
111 struct net_device_subqueue
113 /* Give a control state for each queue. This struct may contain
114 * per-queue locks in the future.
120 * Network device statistics. Akin to the 2.0 ether stats but
121 * with byte counters.
124 struct net_device_stats
126 unsigned long rx_packets; /* total packets received */
127 unsigned long tx_packets; /* total packets transmitted */
128 unsigned long rx_bytes; /* total bytes received */
129 unsigned long tx_bytes; /* total bytes transmitted */
130 unsigned long rx_errors; /* bad packets received */
131 unsigned long tx_errors; /* packet transmit problems */
132 unsigned long rx_dropped; /* no space in linux buffers */
133 unsigned long tx_dropped; /* no space available in linux */
134 unsigned long multicast; /* multicast packets received */
135 unsigned long collisions;
137 /* detailed rx_errors: */
138 unsigned long rx_length_errors;
139 unsigned long rx_over_errors; /* receiver ring buff overflow */
140 unsigned long rx_crc_errors; /* recved pkt with crc error */
141 unsigned long rx_frame_errors; /* recv'd frame alignment error */
142 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
143 unsigned long rx_missed_errors; /* receiver missed packet */
145 /* detailed tx_errors */
146 unsigned long tx_aborted_errors;
147 unsigned long tx_carrier_errors;
148 unsigned long tx_fifo_errors;
149 unsigned long tx_heartbeat_errors;
150 unsigned long tx_window_errors;
153 unsigned long rx_compressed;
154 unsigned long tx_compressed;
158 /* Media selection options. */
171 #include <linux/cache.h>
172 #include <linux/skbuff.h>
178 struct netif_rx_stats
182 unsigned time_squeeze;
183 unsigned cpu_collision;
186 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
190 struct dev_addr_list *next;
191 u8 da_addr[MAX_ADDR_LEN];
198 * We tag multicasts with these structures.
201 #define dev_mc_list dev_addr_list
202 #define dmi_addr da_addr
203 #define dmi_addrlen da_addrlen
204 #define dmi_users da_users
205 #define dmi_gusers da_gusers
209 struct hh_cache *hh_next; /* Next entry */
210 atomic_t hh_refcnt; /* number of users */
212 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
214 * They are mostly read, but hh_refcnt may be changed quite frequently,
215 * incurring cache line ping pongs.
217 __be16 hh_type ____cacheline_aligned_in_smp;
218 /* protocol identifier, f.e ETH_P_IP
219 * NOTE: For VLANs, this will be the
220 * encapuslated type. --BLG
222 u16 hh_len; /* length of header */
223 int (*hh_output)(struct sk_buff *skb);
226 /* cached hardware header; allow for machine alignment needs. */
227 #define HH_DATA_MOD 16
228 #define HH_DATA_OFF(__len) \
229 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
230 #define HH_DATA_ALIGN(__len) \
231 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
232 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
235 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
237 * dev->hard_header_len ? (dev->hard_header_len +
238 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
240 * We could use other alignment values, but we must maintain the
241 * relationship HH alignment <= LL alignment.
243 #define LL_RESERVED_SPACE(dev) \
244 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
245 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
246 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
248 /* These flag bits are private to the generic network queueing
249 * layer, they may not be explicitly referenced by any other
257 __LINK_STATE_PRESENT,
259 __LINK_STATE_NOCARRIER,
260 __LINK_STATE_RX_SCHED,
261 __LINK_STATE_LINKWATCH_PENDING,
262 __LINK_STATE_DORMANT,
263 __LINK_STATE_QDISC_RUNNING,
264 /* Set by the netpoll NAPI code */
265 __LINK_STATE_POLL_LIST_FROZEN,
270 * This structure holds at boot time configured netdevice settings. They
271 * are then used in the device probing.
273 struct netdev_boot_setup {
277 #define NETDEV_BOOT_SETUP_MAX 8
279 extern int __init netdev_boot_setup(char *str);
282 * The DEVICE structure.
283 * Actually, this whole structure is a big mistake. It mixes I/O
284 * data with strictly "high-level" data, and it has to know about
285 * almost every data structure used in the INET module.
287 * FIXME: cleanup struct net_device such that network protocol info
295 * This is the first field of the "visible" part of this structure
296 * (i.e. as seen by users in the "Space.c" file). It is the name
300 /* device name hash chain */
301 struct hlist_node name_hlist;
304 * I/O specific fields
305 * FIXME: Merge these and struct ifmap into one
307 unsigned long mem_end; /* shared mem end */
308 unsigned long mem_start; /* shared mem start */
309 unsigned long base_addr; /* device I/O address */
310 unsigned int irq; /* device IRQ number */
313 * Some hardware also needs these fields, but they are not
314 * part of the usual set specified in Space.c.
317 unsigned char if_port; /* Selectable AUI, TP,..*/
318 unsigned char dma; /* DMA channel */
322 struct list_head dev_list;
324 /* The device initialization function. Called only once. */
325 int (*init)(struct net_device *dev);
327 /* ------- Fields preinitialized in Space.c finish here ------- */
329 /* Net device features */
330 unsigned long features;
331 #define NETIF_F_SG 1 /* Scatter/gather IO. */
332 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
333 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
334 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
335 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
336 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
337 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
338 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
339 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
340 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
341 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
342 #define NETIF_F_GSO 2048 /* Enable software GSO. */
343 #define NETIF_F_LLTX 4096 /* LockLess TX */
344 #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
346 /* Segmentation offload features */
347 #define NETIF_F_GSO_SHIFT 16
348 #define NETIF_F_GSO_MASK 0xffff0000
349 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
350 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
351 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
352 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
353 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
355 /* List of features with software fallbacks. */
356 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
359 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
360 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
361 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
362 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
364 struct net_device *next_sched;
366 /* Interface index. Unique device identifier */
371 struct net_device_stats* (*get_stats)(struct net_device *dev);
372 struct net_device_stats stats;
374 #ifdef CONFIG_WIRELESS_EXT
375 /* List of functions to handle Wireless Extensions (instead of ioctl).
376 * See <net/iw_handler.h> for details. Jean II */
377 const struct iw_handler_def * wireless_handlers;
378 /* Instance data managed by the core of Wireless Extensions. */
379 struct iw_public_data * wireless_data;
381 const struct ethtool_ops *ethtool_ops;
384 * This marks the end of the "visible" part of the structure. All
385 * fields hereafter are internal to the system, and may change at
386 * will (read: may be cleaned up at will).
390 unsigned int flags; /* interface flags (a la BSD) */
391 unsigned short gflags;
392 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
393 unsigned short padded; /* How much padding added by alloc_netdev() */
395 unsigned char operstate; /* RFC2863 operstate */
396 unsigned char link_mode; /* mapping policy to operstate */
398 unsigned mtu; /* interface MTU value */
399 unsigned short type; /* interface hardware type */
400 unsigned short hard_header_len; /* hardware hdr length */
402 struct net_device *master; /* Pointer to master device of a group,
403 * which this device is member of.
406 /* Interface address info. */
407 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
408 unsigned char addr_len; /* hardware address length */
409 unsigned short dev_id; /* for shared network cards */
411 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
412 int uc_count; /* Number of installed ucasts */
414 struct dev_addr_list *mc_list; /* Multicast mac addresses */
415 int mc_count; /* Number of installed mcasts */
420 /* Protocol specific pointers */
422 void *atalk_ptr; /* AppleTalk link */
423 void *ip_ptr; /* IPv4 specific data */
424 void *dn_ptr; /* DECnet specific data */
425 void *ip6_ptr; /* IPv6 specific data */
426 void *ec_ptr; /* Econet specific data */
427 void *ax25_ptr; /* AX.25 specific data */
428 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
429 assign before registering */
432 * Cache line mostly used on receive path (including eth_type_trans())
434 struct list_head poll_list ____cacheline_aligned_in_smp;
435 /* Link to poll list */
437 int (*poll) (struct net_device *dev, int *quota);
440 unsigned long last_rx; /* Time of last Rx */
441 /* Interface address info used in eth_type_trans() */
442 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
443 because most packets are unicast) */
445 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
448 * Cache line mostly used on queue transmit path (qdisc)
450 /* device queue lock */
451 spinlock_t queue_lock ____cacheline_aligned_in_smp;
453 struct Qdisc *qdisc_sleeping;
454 struct list_head qdisc_list;
455 unsigned long tx_queue_len; /* Max frames per queue allowed */
457 /* Partially transmitted GSO packet. */
458 struct sk_buff *gso_skb;
460 /* ingress path synchronizer */
461 spinlock_t ingress_lock;
462 struct Qdisc *qdisc_ingress;
465 * One part is mostly used on xmit path (device)
467 /* hard_start_xmit synchronizer */
468 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
469 /* cpu id of processor entered to hard_start_xmit or -1,
470 if nobody entered there.
473 void *priv; /* pointer to private data */
474 int (*hard_start_xmit) (struct sk_buff *skb,
475 struct net_device *dev);
476 /* These may be needed for future network-power-down code. */
477 unsigned long trans_start; /* Time (in jiffies) of last Tx */
479 int watchdog_timeo; /* used by dev_watchdog() */
480 struct timer_list watchdog_timer;
483 * refcnt is a very hot point, so align it on SMP
485 /* Number of references to this device */
486 atomic_t refcnt ____cacheline_aligned_in_smp;
488 /* delayed register/unregister */
489 struct list_head todo_list;
490 /* device index hash chain */
491 struct hlist_node index_hlist;
493 struct net_device *link_watch_next;
495 /* register/unregister state machine */
496 enum { NETREG_UNINITIALIZED=0,
497 NETREG_REGISTERED, /* completed register_netdevice */
498 NETREG_UNREGISTERING, /* called unregister_netdevice */
499 NETREG_UNREGISTERED, /* completed unregister todo */
500 NETREG_RELEASED, /* called free_netdev */
503 /* Called after device is detached from network. */
504 void (*uninit)(struct net_device *dev);
505 /* Called after last user reference disappears. */
506 void (*destructor)(struct net_device *dev);
508 /* Pointers to interface service routines. */
509 int (*open)(struct net_device *dev);
510 int (*stop)(struct net_device *dev);
511 #define HAVE_NETDEV_POLL
512 int (*hard_header) (struct sk_buff *skb,
513 struct net_device *dev,
518 int (*rebuild_header)(struct sk_buff *skb);
519 #define HAVE_CHANGE_RX_FLAGS
520 void (*change_rx_flags)(struct net_device *dev,
522 #define HAVE_SET_RX_MODE
523 void (*set_rx_mode)(struct net_device *dev);
524 #define HAVE_MULTICAST
525 void (*set_multicast_list)(struct net_device *dev);
526 #define HAVE_SET_MAC_ADDR
527 int (*set_mac_address)(struct net_device *dev,
529 #define HAVE_PRIVATE_IOCTL
530 int (*do_ioctl)(struct net_device *dev,
531 struct ifreq *ifr, int cmd);
532 #define HAVE_SET_CONFIG
533 int (*set_config)(struct net_device *dev,
535 #define HAVE_HEADER_CACHE
536 int (*hard_header_cache)(struct neighbour *neigh,
537 struct hh_cache *hh);
538 void (*header_cache_update)(struct hh_cache *hh,
539 struct net_device *dev,
540 unsigned char * haddr);
541 #define HAVE_CHANGE_MTU
542 int (*change_mtu)(struct net_device *dev, int new_mtu);
544 #define HAVE_TX_TIMEOUT
545 void (*tx_timeout) (struct net_device *dev);
547 void (*vlan_rx_register)(struct net_device *dev,
548 struct vlan_group *grp);
549 void (*vlan_rx_add_vid)(struct net_device *dev,
551 void (*vlan_rx_kill_vid)(struct net_device *dev,
554 int (*hard_header_parse)(struct sk_buff *skb,
555 unsigned char *haddr);
556 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
557 #ifdef CONFIG_NETPOLL
558 struct netpoll_info *npinfo;
560 #ifdef CONFIG_NET_POLL_CONTROLLER
561 void (*poll_controller)(struct net_device *dev);
565 struct net_bridge_port *br_port;
567 /* class/net/name entry */
569 /* space for optional statistics and wireless sysfs groups */
570 struct attribute_group *sysfs_groups[3];
572 /* rtnetlink link ops */
573 const struct rtnl_link_ops *rtnl_link_ops;
575 /* The TX queue control structures */
576 unsigned int egress_subqueue_count;
577 struct net_device_subqueue egress_subqueue[0];
579 #define to_net_dev(d) container_of(d, struct net_device, dev)
581 #define NETDEV_ALIGN 32
582 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
584 static inline void *netdev_priv(const struct net_device *dev)
589 #define SET_MODULE_OWNER(dev) do { } while (0)
590 /* Set the sysfs physical device reference for the network logical device
591 * if set prior to registration will cause a symlink during initialization.
593 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
596 __be16 type; /* This is really htons(ether_type). */
597 struct net_device *dev; /* NULL is wildcarded here */
598 int (*func) (struct sk_buff *,
600 struct packet_type *,
601 struct net_device *);
602 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
604 int (*gso_send_check)(struct sk_buff *skb);
605 void *af_packet_priv;
606 struct list_head list;
609 #include <linux/interrupt.h>
610 #include <linux/notifier.h>
612 extern struct net_device loopback_dev; /* The loopback */
613 extern struct list_head dev_base_head; /* All devices */
614 extern rwlock_t dev_base_lock; /* Device list lock */
616 #define for_each_netdev(d) \
617 list_for_each_entry(d, &dev_base_head, dev_list)
618 #define for_each_netdev_safe(d, n) \
619 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
620 #define for_each_netdev_continue(d) \
621 list_for_each_entry_continue(d, &dev_base_head, dev_list)
622 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
624 static inline struct net_device *next_net_device(struct net_device *dev)
626 struct list_head *lh;
628 lh = dev->dev_list.next;
629 return lh == &dev_base_head ? NULL : net_device_entry(lh);
632 static inline struct net_device *first_net_device(void)
634 return list_empty(&dev_base_head) ? NULL :
635 net_device_entry(dev_base_head.next);
638 extern int netdev_boot_setup_check(struct net_device *dev);
639 extern unsigned long netdev_boot_base(const char *prefix, int unit);
640 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
641 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
642 extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
643 extern void dev_add_pack(struct packet_type *pt);
644 extern void dev_remove_pack(struct packet_type *pt);
645 extern void __dev_remove_pack(struct packet_type *pt);
647 extern struct net_device *dev_get_by_flags(unsigned short flags,
648 unsigned short mask);
649 extern struct net_device *dev_get_by_name(const char *name);
650 extern struct net_device *__dev_get_by_name(const char *name);
651 extern int dev_alloc_name(struct net_device *dev, const char *name);
652 extern int dev_open(struct net_device *dev);
653 extern int dev_close(struct net_device *dev);
654 extern int dev_queue_xmit(struct sk_buff *skb);
655 extern int register_netdevice(struct net_device *dev);
656 extern void unregister_netdevice(struct net_device *dev);
657 extern void free_netdev(struct net_device *dev);
658 extern void synchronize_net(void);
659 extern int register_netdevice_notifier(struct notifier_block *nb);
660 extern int unregister_netdevice_notifier(struct notifier_block *nb);
661 extern int call_netdevice_notifiers(unsigned long val, void *v);
662 extern struct net_device *dev_get_by_index(int ifindex);
663 extern struct net_device *__dev_get_by_index(int ifindex);
664 extern int dev_restart(struct net_device *dev);
665 #ifdef CONFIG_NETPOLL_TRAP
666 extern int netpoll_trap(void);
669 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
670 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
671 static inline int unregister_gifconf(unsigned int family)
673 return register_gifconf(family, NULL);
677 * Incoming packets are placed on per-cpu queues so that
678 * no locking is needed.
683 struct net_device *output_queue;
684 struct sk_buff_head input_pkt_queue;
685 struct list_head poll_list;
686 struct sk_buff *completion_queue;
688 struct net_device backlog_dev; /* Sorry. 8) */
689 #ifdef CONFIG_NET_DMA
690 struct dma_chan *net_dma;
694 DECLARE_PER_CPU(struct softnet_data,softnet_data);
696 #define HAVE_NETIF_QUEUE
698 extern void __netif_schedule(struct net_device *dev);
700 static inline void netif_schedule(struct net_device *dev)
702 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
703 __netif_schedule(dev);
706 static inline void netif_start_queue(struct net_device *dev)
708 clear_bit(__LINK_STATE_XOFF, &dev->state);
711 static inline void netif_wake_queue(struct net_device *dev)
713 #ifdef CONFIG_NETPOLL_TRAP
714 if (netpoll_trap()) {
715 clear_bit(__LINK_STATE_XOFF, &dev->state);
719 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
720 __netif_schedule(dev);
723 static inline void netif_stop_queue(struct net_device *dev)
725 set_bit(__LINK_STATE_XOFF, &dev->state);
728 static inline int netif_queue_stopped(const struct net_device *dev)
730 return test_bit(__LINK_STATE_XOFF, &dev->state);
733 static inline int netif_running(const struct net_device *dev)
735 return test_bit(__LINK_STATE_START, &dev->state);
739 * Routines to manage the subqueues on a device. We only need start
740 * stop, and a check if it's stopped. All other device management is
741 * done at the overall netdevice level.
742 * Also test the device if we're multiqueue.
744 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
746 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
747 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
751 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
753 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
754 #ifdef CONFIG_NETPOLL_TRAP
758 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
762 static inline int netif_subqueue_stopped(const struct net_device *dev,
765 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
766 return test_bit(__LINK_STATE_XOFF,
767 &dev->egress_subqueue[queue_index].state);
773 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
775 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
776 #ifdef CONFIG_NETPOLL_TRAP
780 if (test_and_clear_bit(__LINK_STATE_XOFF,
781 &dev->egress_subqueue[queue_index].state))
782 __netif_schedule(dev);
786 static inline int netif_is_multiqueue(const struct net_device *dev)
788 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
789 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
795 /* Use this variant when it is known for sure that it
796 * is executing from interrupt context.
798 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
800 if (atomic_dec_and_test(&skb->users)) {
801 struct softnet_data *sd;
804 local_irq_save(flags);
805 sd = &__get_cpu_var(softnet_data);
806 skb->next = sd->completion_queue;
807 sd->completion_queue = skb;
808 raise_softirq_irqoff(NET_TX_SOFTIRQ);
809 local_irq_restore(flags);
813 /* Use this variant in places where it could be invoked
814 * either from interrupt or non-interrupt context.
816 extern void dev_kfree_skb_any(struct sk_buff *skb);
818 #define HAVE_NETIF_RX 1
819 extern int netif_rx(struct sk_buff *skb);
820 extern int netif_rx_ni(struct sk_buff *skb);
821 #define HAVE_NETIF_RECEIVE_SKB 1
822 extern int netif_receive_skb(struct sk_buff *skb);
823 extern int dev_valid_name(const char *name);
824 extern int dev_ioctl(unsigned int cmd, void __user *);
825 extern int dev_ethtool(struct ifreq *);
826 extern unsigned dev_get_flags(const struct net_device *);
827 extern int dev_change_flags(struct net_device *, unsigned);
828 extern int dev_change_name(struct net_device *, char *);
829 extern int dev_set_mtu(struct net_device *, int);
830 extern int dev_set_mac_address(struct net_device *,
832 extern int dev_hard_start_xmit(struct sk_buff *skb,
833 struct net_device *dev);
835 extern void dev_init(void);
837 extern int netdev_budget;
839 /* Called by rtnetlink.c:rtnl_unlock() */
840 extern void netdev_run_todo(void);
842 static inline void dev_put(struct net_device *dev)
844 atomic_dec(&dev->refcnt);
847 static inline void dev_hold(struct net_device *dev)
849 atomic_inc(&dev->refcnt);
852 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
853 * and _off may be called from IRQ context, but it is caller
854 * who is responsible for serialization of these calls.
856 * The name carrier is inappropriate, these functions should really be
857 * called netif_lowerlayer_*() because they represent the state of any
858 * kind of lower layer not just hardware media.
861 extern void linkwatch_fire_event(struct net_device *dev);
863 static inline int netif_carrier_ok(const struct net_device *dev)
865 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
868 extern void __netdev_watchdog_up(struct net_device *dev);
870 extern void netif_carrier_on(struct net_device *dev);
872 extern void netif_carrier_off(struct net_device *dev);
874 static inline void netif_dormant_on(struct net_device *dev)
876 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
877 linkwatch_fire_event(dev);
880 static inline void netif_dormant_off(struct net_device *dev)
882 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
883 linkwatch_fire_event(dev);
886 static inline int netif_dormant(const struct net_device *dev)
888 return test_bit(__LINK_STATE_DORMANT, &dev->state);
892 static inline int netif_oper_up(const struct net_device *dev) {
893 return (dev->operstate == IF_OPER_UP ||
894 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
898 static inline int netif_device_present(struct net_device *dev)
900 return test_bit(__LINK_STATE_PRESENT, &dev->state);
903 extern void netif_device_detach(struct net_device *dev);
905 extern void netif_device_attach(struct net_device *dev);
908 * Network interface message level settings
910 #define HAVE_NETIF_MSG 1
913 NETIF_MSG_DRV = 0x0001,
914 NETIF_MSG_PROBE = 0x0002,
915 NETIF_MSG_LINK = 0x0004,
916 NETIF_MSG_TIMER = 0x0008,
917 NETIF_MSG_IFDOWN = 0x0010,
918 NETIF_MSG_IFUP = 0x0020,
919 NETIF_MSG_RX_ERR = 0x0040,
920 NETIF_MSG_TX_ERR = 0x0080,
921 NETIF_MSG_TX_QUEUED = 0x0100,
922 NETIF_MSG_INTR = 0x0200,
923 NETIF_MSG_TX_DONE = 0x0400,
924 NETIF_MSG_RX_STATUS = 0x0800,
925 NETIF_MSG_PKTDATA = 0x1000,
926 NETIF_MSG_HW = 0x2000,
927 NETIF_MSG_WOL = 0x4000,
930 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
931 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
932 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
933 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
934 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
935 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
936 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
937 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
938 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
939 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
940 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
941 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
942 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
943 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
944 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
946 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
949 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
950 return default_msg_enable_bits;
951 if (debug_value == 0) /* no output */
954 return (1 << debug_value) - 1;
957 /* Test if receive needs to be scheduled */
958 static inline int __netif_rx_schedule_prep(struct net_device *dev)
960 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
963 /* Test if receive needs to be scheduled but only if up */
964 static inline int netif_rx_schedule_prep(struct net_device *dev)
966 return netif_running(dev) && __netif_rx_schedule_prep(dev);
969 /* Add interface to tail of rx poll list. This assumes that _prep has
970 * already been called and returned 1.
973 extern void __netif_rx_schedule(struct net_device *dev);
975 /* Try to reschedule poll. Called by irq handler. */
977 static inline void netif_rx_schedule(struct net_device *dev)
979 if (netif_rx_schedule_prep(dev))
980 __netif_rx_schedule(dev);
983 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
984 * Do not inline this?
986 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
988 if (netif_rx_schedule_prep(dev)) {
993 local_irq_save(flags);
994 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
995 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
996 local_irq_restore(flags);
1002 /* same as netif_rx_complete, except that local_irq_save(flags)
1003 * has already been issued
1005 static inline void __netif_rx_complete(struct net_device *dev)
1007 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
1008 list_del(&dev->poll_list);
1009 smp_mb__before_clear_bit();
1010 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
1013 /* Remove interface from poll list: it must be in the poll list
1014 * on current cpu. This primitive is called by dev->poll(), when
1015 * it completes the work. The device cannot be out of poll list at this
1016 * moment, it is BUG().
1018 static inline void netif_rx_complete(struct net_device *dev)
1020 unsigned long flags;
1022 #ifdef CONFIG_NETPOLL
1023 /* Prevent race with netpoll - yes, this is a kludge.
1024 * But at least it doesn't penalize the non-netpoll
1026 if (test_bit(__LINK_STATE_POLL_LIST_FROZEN, &dev->state))
1030 local_irq_save(flags);
1031 __netif_rx_complete(dev);
1032 local_irq_restore(flags);
1035 static inline void netif_poll_disable(struct net_device *dev)
1037 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1039 schedule_timeout_interruptible(1);
1042 static inline void netif_poll_enable(struct net_device *dev)
1044 smp_mb__before_clear_bit();
1045 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
1048 static inline void netif_tx_lock(struct net_device *dev)
1050 spin_lock(&dev->_xmit_lock);
1051 dev->xmit_lock_owner = smp_processor_id();
1054 static inline void netif_tx_lock_bh(struct net_device *dev)
1056 spin_lock_bh(&dev->_xmit_lock);
1057 dev->xmit_lock_owner = smp_processor_id();
1060 static inline int netif_tx_trylock(struct net_device *dev)
1062 int ok = spin_trylock(&dev->_xmit_lock);
1064 dev->xmit_lock_owner = smp_processor_id();
1068 static inline void netif_tx_unlock(struct net_device *dev)
1070 dev->xmit_lock_owner = -1;
1071 spin_unlock(&dev->_xmit_lock);
1074 static inline void netif_tx_unlock_bh(struct net_device *dev)
1076 dev->xmit_lock_owner = -1;
1077 spin_unlock_bh(&dev->_xmit_lock);
1080 static inline void netif_tx_disable(struct net_device *dev)
1082 netif_tx_lock_bh(dev);
1083 netif_stop_queue(dev);
1084 netif_tx_unlock_bh(dev);
1087 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1089 extern void ether_setup(struct net_device *dev);
1091 /* Support for loadable net-drivers */
1092 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1093 void (*setup)(struct net_device *),
1094 unsigned int queue_count);
1095 #define alloc_netdev(sizeof_priv, name, setup) \
1096 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1097 extern int register_netdev(struct net_device *dev);
1098 extern void unregister_netdev(struct net_device *dev);
1099 /* Functions used for secondary unicast and multicast support */
1100 extern void dev_set_rx_mode(struct net_device *dev);
1101 extern void __dev_set_rx_mode(struct net_device *dev);
1102 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1103 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1104 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1105 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1106 extern void dev_mc_discard(struct net_device *dev);
1107 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1108 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1109 extern void __dev_addr_discard(struct dev_addr_list **list);
1110 extern void dev_set_promiscuity(struct net_device *dev, int inc);
1111 extern void dev_set_allmulti(struct net_device *dev, int inc);
1112 extern void netdev_state_change(struct net_device *dev);
1113 extern void netdev_features_change(struct net_device *dev);
1114 /* Load a device via the kmod */
1115 extern void dev_load(const char *name);
1116 extern void dev_mcast_init(void);
1117 extern int netdev_max_backlog;
1118 extern int weight_p;
1119 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1120 extern int skb_checksum_help(struct sk_buff *skb);
1121 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1123 extern void netdev_rx_csum_fault(struct net_device *dev);
1125 static inline void netdev_rx_csum_fault(struct net_device *dev)
1129 /* rx skb timestamps */
1130 extern void net_enable_timestamp(void);
1131 extern void net_disable_timestamp(void);
1133 #ifdef CONFIG_PROC_FS
1134 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1135 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1136 extern void dev_seq_stop(struct seq_file *seq, void *v);
1139 extern void linkwatch_run_queue(void);
1141 static inline int net_gso_ok(int features, int gso_type)
1143 int feature = gso_type << NETIF_F_GSO_SHIFT;
1144 return (features & feature) == feature;
1147 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1149 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1152 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1154 return skb_is_gso(skb) &&
1155 (!skb_gso_ok(skb, dev->features) ||
1156 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1159 /* On bonding slaves other than the currently active slave, suppress
1160 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1161 * ARP on active-backup slaves with arp_validate enabled.
1163 static inline int skb_bond_should_drop(struct sk_buff *skb)
1165 struct net_device *dev = skb->dev;
1166 struct net_device *master = dev->master;
1169 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1170 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1171 skb->protocol == __constant_htons(ETH_P_ARP))
1174 if (master->priv_flags & IFF_MASTER_ALB) {
1175 if (skb->pkt_type != PACKET_BROADCAST &&
1176 skb->pkt_type != PACKET_MULTICAST)
1179 if (master->priv_flags & IFF_MASTER_8023AD &&
1180 skb->protocol == __constant_htons(ETH_P_SLOW))
1188 #endif /* __KERNEL__ */
1190 #endif /* _LINUX_DEV_H */