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];
199 * We tag multicasts with these structures.
202 #define dev_mc_list dev_addr_list
203 #define dmi_addr da_addr
204 #define dmi_addrlen da_addrlen
205 #define dmi_users da_users
206 #define dmi_gusers da_gusers
210 struct hh_cache *hh_next; /* Next entry */
211 atomic_t hh_refcnt; /* number of users */
213 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
215 * They are mostly read, but hh_refcnt may be changed quite frequently,
216 * incurring cache line ping pongs.
218 __be16 hh_type ____cacheline_aligned_in_smp;
219 /* protocol identifier, f.e ETH_P_IP
220 * NOTE: For VLANs, this will be the
221 * encapuslated type. --BLG
223 u16 hh_len; /* length of header */
224 int (*hh_output)(struct sk_buff *skb);
227 /* cached hardware header; allow for machine alignment needs. */
228 #define HH_DATA_MOD 16
229 #define HH_DATA_OFF(__len) \
230 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
231 #define HH_DATA_ALIGN(__len) \
232 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
233 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
236 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
238 * dev->hard_header_len ? (dev->hard_header_len +
239 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
241 * We could use other alignment values, but we must maintain the
242 * relationship HH alignment <= LL alignment.
244 #define LL_RESERVED_SPACE(dev) \
245 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
246 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
247 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
249 /* These flag bits are private to the generic network queueing
250 * layer, they may not be explicitly referenced by any other
258 __LINK_STATE_PRESENT,
260 __LINK_STATE_NOCARRIER,
261 __LINK_STATE_RX_SCHED,
262 __LINK_STATE_LINKWATCH_PENDING,
263 __LINK_STATE_DORMANT,
264 __LINK_STATE_QDISC_RUNNING,
269 * This structure holds at boot time configured netdevice settings. They
270 * are then used in the device probing.
272 struct netdev_boot_setup {
276 #define NETDEV_BOOT_SETUP_MAX 8
278 extern int __init netdev_boot_setup(char *str);
281 * The DEVICE structure.
282 * Actually, this whole structure is a big mistake. It mixes I/O
283 * data with strictly "high-level" data, and it has to know about
284 * almost every data structure used in the INET module.
286 * FIXME: cleanup struct net_device such that network protocol info
294 * This is the first field of the "visible" part of this structure
295 * (i.e. as seen by users in the "Space.c" file). It is the name
299 /* device name hash chain */
300 struct hlist_node name_hlist;
303 * I/O specific fields
304 * FIXME: Merge these and struct ifmap into one
306 unsigned long mem_end; /* shared mem end */
307 unsigned long mem_start; /* shared mem start */
308 unsigned long base_addr; /* device I/O address */
309 unsigned int irq; /* device IRQ number */
312 * Some hardware also needs these fields, but they are not
313 * part of the usual set specified in Space.c.
316 unsigned char if_port; /* Selectable AUI, TP,..*/
317 unsigned char dma; /* DMA channel */
321 struct list_head dev_list;
323 /* The device initialization function. Called only once. */
324 int (*init)(struct net_device *dev);
326 /* ------- Fields preinitialized in Space.c finish here ------- */
328 /* Net device features */
329 unsigned long features;
330 #define NETIF_F_SG 1 /* Scatter/gather IO. */
331 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
332 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
333 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
334 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
335 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
336 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
337 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
338 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
339 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
340 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
341 #define NETIF_F_GSO 2048 /* Enable software GSO. */
342 #define NETIF_F_LLTX 4096 /* LockLess TX */
343 #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
345 /* Segmentation offload features */
346 #define NETIF_F_GSO_SHIFT 16
347 #define NETIF_F_GSO_MASK 0xffff0000
348 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
349 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
350 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
351 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
352 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
354 /* List of features with software fallbacks. */
355 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
358 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
359 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
360 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
361 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
363 struct net_device *next_sched;
365 /* Interface index. Unique device identifier */
370 struct net_device_stats* (*get_stats)(struct net_device *dev);
371 struct net_device_stats stats;
373 #ifdef CONFIG_WIRELESS_EXT
374 /* List of functions to handle Wireless Extensions (instead of ioctl).
375 * See <net/iw_handler.h> for details. Jean II */
376 const struct iw_handler_def * wireless_handlers;
377 /* Instance data managed by the core of Wireless Extensions. */
378 struct iw_public_data * wireless_data;
380 const struct ethtool_ops *ethtool_ops;
383 * This marks the end of the "visible" part of the structure. All
384 * fields hereafter are internal to the system, and may change at
385 * will (read: may be cleaned up at will).
389 unsigned int flags; /* interface flags (a la BSD) */
390 unsigned short gflags;
391 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
392 unsigned short padded; /* How much padding added by alloc_netdev() */
394 unsigned char operstate; /* RFC2863 operstate */
395 unsigned char link_mode; /* mapping policy to operstate */
397 unsigned mtu; /* interface MTU value */
398 unsigned short type; /* interface hardware type */
399 unsigned short hard_header_len; /* hardware hdr length */
401 struct net_device *master; /* Pointer to master device of a group,
402 * which this device is member of.
405 /* Interface address info. */
406 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
407 unsigned char addr_len; /* hardware address length */
408 unsigned short dev_id; /* for shared network cards */
410 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
411 int uc_count; /* Number of installed ucasts */
413 struct dev_addr_list *mc_list; /* Multicast mac addresses */
414 int mc_count; /* Number of installed mcasts */
419 /* Protocol specific pointers */
421 void *atalk_ptr; /* AppleTalk link */
422 void *ip_ptr; /* IPv4 specific data */
423 void *dn_ptr; /* DECnet specific data */
424 void *ip6_ptr; /* IPv6 specific data */
425 void *ec_ptr; /* Econet specific data */
426 void *ax25_ptr; /* AX.25 specific data */
427 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
428 assign before registering */
431 * Cache line mostly used on receive path (including eth_type_trans())
433 struct list_head poll_list ____cacheline_aligned_in_smp;
434 /* Link to poll list */
436 int (*poll) (struct net_device *dev, int *quota);
439 unsigned long last_rx; /* Time of last Rx */
440 /* Interface address info used in eth_type_trans() */
441 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
442 because most packets are unicast) */
444 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
447 * Cache line mostly used on queue transmit path (qdisc)
449 /* device queue lock */
450 spinlock_t queue_lock ____cacheline_aligned_in_smp;
452 struct Qdisc *qdisc_sleeping;
453 struct list_head qdisc_list;
454 unsigned long tx_queue_len; /* Max frames per queue allowed */
456 /* Partially transmitted GSO packet. */
457 struct sk_buff *gso_skb;
459 /* ingress path synchronizer */
460 spinlock_t ingress_lock;
461 struct Qdisc *qdisc_ingress;
464 * One part is mostly used on xmit path (device)
466 /* hard_start_xmit synchronizer */
467 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
468 /* cpu id of processor entered to hard_start_xmit or -1,
469 if nobody entered there.
472 void *priv; /* pointer to private data */
473 int (*hard_start_xmit) (struct sk_buff *skb,
474 struct net_device *dev);
475 /* These may be needed for future network-power-down code. */
476 unsigned long trans_start; /* Time (in jiffies) of last Tx */
478 int watchdog_timeo; /* used by dev_watchdog() */
479 struct timer_list watchdog_timer;
482 * refcnt is a very hot point, so align it on SMP
484 /* Number of references to this device */
485 atomic_t refcnt ____cacheline_aligned_in_smp;
487 /* delayed register/unregister */
488 struct list_head todo_list;
489 /* device index hash chain */
490 struct hlist_node index_hlist;
492 struct net_device *link_watch_next;
494 /* register/unregister state machine */
495 enum { NETREG_UNINITIALIZED=0,
496 NETREG_REGISTERED, /* completed register_netdevice */
497 NETREG_UNREGISTERING, /* called unregister_netdevice */
498 NETREG_UNREGISTERED, /* completed unregister todo */
499 NETREG_RELEASED, /* called free_netdev */
502 /* Called after device is detached from network. */
503 void (*uninit)(struct net_device *dev);
504 /* Called after last user reference disappears. */
505 void (*destructor)(struct net_device *dev);
507 /* Pointers to interface service routines. */
508 int (*open)(struct net_device *dev);
509 int (*stop)(struct net_device *dev);
510 #define HAVE_NETDEV_POLL
511 int (*hard_header) (struct sk_buff *skb,
512 struct net_device *dev,
517 int (*rebuild_header)(struct sk_buff *skb);
518 #define HAVE_CHANGE_RX_FLAGS
519 void (*change_rx_flags)(struct net_device *dev,
521 #define HAVE_SET_RX_MODE
522 void (*set_rx_mode)(struct net_device *dev);
523 #define HAVE_MULTICAST
524 void (*set_multicast_list)(struct net_device *dev);
525 #define HAVE_SET_MAC_ADDR
526 int (*set_mac_address)(struct net_device *dev,
528 #define HAVE_PRIVATE_IOCTL
529 int (*do_ioctl)(struct net_device *dev,
530 struct ifreq *ifr, int cmd);
531 #define HAVE_SET_CONFIG
532 int (*set_config)(struct net_device *dev,
534 #define HAVE_HEADER_CACHE
535 int (*hard_header_cache)(struct neighbour *neigh,
536 struct hh_cache *hh);
537 void (*header_cache_update)(struct hh_cache *hh,
538 struct net_device *dev,
539 unsigned char * haddr);
540 #define HAVE_CHANGE_MTU
541 int (*change_mtu)(struct net_device *dev, int new_mtu);
543 #define HAVE_TX_TIMEOUT
544 void (*tx_timeout) (struct net_device *dev);
546 void (*vlan_rx_register)(struct net_device *dev,
547 struct vlan_group *grp);
548 void (*vlan_rx_add_vid)(struct net_device *dev,
550 void (*vlan_rx_kill_vid)(struct net_device *dev,
553 int (*hard_header_parse)(struct sk_buff *skb,
554 unsigned char *haddr);
555 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
556 #ifdef CONFIG_NETPOLL
557 struct netpoll_info *npinfo;
559 #ifdef CONFIG_NET_POLL_CONTROLLER
560 void (*poll_controller)(struct net_device *dev);
564 struct net_bridge_port *br_port;
566 struct macvlan_port *macvlan_port;
568 /* class/net/name entry */
570 /* space for optional statistics and wireless sysfs groups */
571 struct attribute_group *sysfs_groups[3];
573 /* rtnetlink link ops */
574 const struct rtnl_link_ops *rtnl_link_ops;
576 /* The TX queue control structures */
577 unsigned int egress_subqueue_count;
578 struct net_device_subqueue egress_subqueue[0];
580 #define to_net_dev(d) container_of(d, struct net_device, dev)
582 #define NETDEV_ALIGN 32
583 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
585 static inline void *netdev_priv(const struct net_device *dev)
590 #define SET_MODULE_OWNER(dev) do { } while (0)
591 /* Set the sysfs physical device reference for the network logical device
592 * if set prior to registration will cause a symlink during initialization.
594 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
597 __be16 type; /* This is really htons(ether_type). */
598 struct net_device *dev; /* NULL is wildcarded here */
599 int (*func) (struct sk_buff *,
601 struct packet_type *,
602 struct net_device *);
603 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
605 int (*gso_send_check)(struct sk_buff *skb);
606 void *af_packet_priv;
607 struct list_head list;
610 #include <linux/interrupt.h>
611 #include <linux/notifier.h>
613 extern struct net_device loopback_dev; /* The loopback */
614 extern struct list_head dev_base_head; /* All devices */
615 extern rwlock_t dev_base_lock; /* Device list lock */
617 #define for_each_netdev(d) \
618 list_for_each_entry(d, &dev_base_head, dev_list)
619 #define for_each_netdev_safe(d, n) \
620 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
621 #define for_each_netdev_continue(d) \
622 list_for_each_entry_continue(d, &dev_base_head, dev_list)
623 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
625 static inline struct net_device *next_net_device(struct net_device *dev)
627 struct list_head *lh;
629 lh = dev->dev_list.next;
630 return lh == &dev_base_head ? NULL : net_device_entry(lh);
633 static inline struct net_device *first_net_device(void)
635 return list_empty(&dev_base_head) ? NULL :
636 net_device_entry(dev_base_head.next);
639 extern int netdev_boot_setup_check(struct net_device *dev);
640 extern unsigned long netdev_boot_base(const char *prefix, int unit);
641 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
642 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
643 extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
644 extern void dev_add_pack(struct packet_type *pt);
645 extern void dev_remove_pack(struct packet_type *pt);
646 extern void __dev_remove_pack(struct packet_type *pt);
648 extern struct net_device *dev_get_by_flags(unsigned short flags,
649 unsigned short mask);
650 extern struct net_device *dev_get_by_name(const char *name);
651 extern struct net_device *__dev_get_by_name(const char *name);
652 extern int dev_alloc_name(struct net_device *dev, const char *name);
653 extern int dev_open(struct net_device *dev);
654 extern int dev_close(struct net_device *dev);
655 extern int dev_queue_xmit(struct sk_buff *skb);
656 extern int register_netdevice(struct net_device *dev);
657 extern void unregister_netdevice(struct net_device *dev);
658 extern void free_netdev(struct net_device *dev);
659 extern void synchronize_net(void);
660 extern int register_netdevice_notifier(struct notifier_block *nb);
661 extern int unregister_netdevice_notifier(struct notifier_block *nb);
662 extern int call_netdevice_notifiers(unsigned long val, void *v);
663 extern struct net_device *dev_get_by_index(int ifindex);
664 extern struct net_device *__dev_get_by_index(int ifindex);
665 extern int dev_restart(struct net_device *dev);
666 #ifdef CONFIG_NETPOLL_TRAP
667 extern int netpoll_trap(void);
670 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
671 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
672 static inline int unregister_gifconf(unsigned int family)
674 return register_gifconf(family, NULL);
678 * Incoming packets are placed on per-cpu queues so that
679 * no locking is needed.
684 struct net_device *output_queue;
685 struct sk_buff_head input_pkt_queue;
686 struct list_head poll_list;
687 struct sk_buff *completion_queue;
689 struct net_device backlog_dev; /* Sorry. 8) */
690 #ifdef CONFIG_NET_DMA
691 struct dma_chan *net_dma;
695 DECLARE_PER_CPU(struct softnet_data,softnet_data);
697 #define HAVE_NETIF_QUEUE
699 extern void __netif_schedule(struct net_device *dev);
701 static inline void netif_schedule(struct net_device *dev)
703 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
704 __netif_schedule(dev);
707 static inline void netif_start_queue(struct net_device *dev)
709 clear_bit(__LINK_STATE_XOFF, &dev->state);
712 static inline void netif_wake_queue(struct net_device *dev)
714 #ifdef CONFIG_NETPOLL_TRAP
715 if (netpoll_trap()) {
716 clear_bit(__LINK_STATE_XOFF, &dev->state);
720 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
721 __netif_schedule(dev);
724 static inline void netif_stop_queue(struct net_device *dev)
726 set_bit(__LINK_STATE_XOFF, &dev->state);
729 static inline int netif_queue_stopped(const struct net_device *dev)
731 return test_bit(__LINK_STATE_XOFF, &dev->state);
734 static inline int netif_running(const struct net_device *dev)
736 return test_bit(__LINK_STATE_START, &dev->state);
740 * Routines to manage the subqueues on a device. We only need start
741 * stop, and a check if it's stopped. All other device management is
742 * done at the overall netdevice level.
743 * Also test the device if we're multiqueue.
745 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
747 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
748 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
752 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
754 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
755 #ifdef CONFIG_NETPOLL_TRAP
759 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
763 static inline int netif_subqueue_stopped(const struct net_device *dev,
766 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
767 return test_bit(__LINK_STATE_XOFF,
768 &dev->egress_subqueue[queue_index].state);
774 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
776 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
777 #ifdef CONFIG_NETPOLL_TRAP
781 if (test_and_clear_bit(__LINK_STATE_XOFF,
782 &dev->egress_subqueue[queue_index].state))
783 __netif_schedule(dev);
787 static inline int netif_is_multiqueue(const struct net_device *dev)
789 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
790 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
796 /* Use this variant when it is known for sure that it
797 * is executing from interrupt context.
799 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
801 if (atomic_dec_and_test(&skb->users)) {
802 struct softnet_data *sd;
805 local_irq_save(flags);
806 sd = &__get_cpu_var(softnet_data);
807 skb->next = sd->completion_queue;
808 sd->completion_queue = skb;
809 raise_softirq_irqoff(NET_TX_SOFTIRQ);
810 local_irq_restore(flags);
814 /* Use this variant in places where it could be invoked
815 * either from interrupt or non-interrupt context.
817 extern void dev_kfree_skb_any(struct sk_buff *skb);
819 #define HAVE_NETIF_RX 1
820 extern int netif_rx(struct sk_buff *skb);
821 extern int netif_rx_ni(struct sk_buff *skb);
822 #define HAVE_NETIF_RECEIVE_SKB 1
823 extern int netif_receive_skb(struct sk_buff *skb);
824 extern int dev_valid_name(const char *name);
825 extern int dev_ioctl(unsigned int cmd, void __user *);
826 extern int dev_ethtool(struct ifreq *);
827 extern unsigned dev_get_flags(const struct net_device *);
828 extern int dev_change_flags(struct net_device *, unsigned);
829 extern int dev_change_name(struct net_device *, char *);
830 extern int dev_set_mtu(struct net_device *, int);
831 extern int dev_set_mac_address(struct net_device *,
833 extern int dev_hard_start_xmit(struct sk_buff *skb,
834 struct net_device *dev);
836 extern void dev_init(void);
838 extern int netdev_budget;
840 /* Called by rtnetlink.c:rtnl_unlock() */
841 extern void netdev_run_todo(void);
843 static inline void dev_put(struct net_device *dev)
845 atomic_dec(&dev->refcnt);
848 static inline void dev_hold(struct net_device *dev)
850 atomic_inc(&dev->refcnt);
853 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
854 * and _off may be called from IRQ context, but it is caller
855 * who is responsible for serialization of these calls.
857 * The name carrier is inappropriate, these functions should really be
858 * called netif_lowerlayer_*() because they represent the state of any
859 * kind of lower layer not just hardware media.
862 extern void linkwatch_fire_event(struct net_device *dev);
864 static inline int netif_carrier_ok(const struct net_device *dev)
866 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
869 extern void __netdev_watchdog_up(struct net_device *dev);
871 extern void netif_carrier_on(struct net_device *dev);
873 extern void netif_carrier_off(struct net_device *dev);
875 static inline void netif_dormant_on(struct net_device *dev)
877 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
878 linkwatch_fire_event(dev);
881 static inline void netif_dormant_off(struct net_device *dev)
883 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
884 linkwatch_fire_event(dev);
887 static inline int netif_dormant(const struct net_device *dev)
889 return test_bit(__LINK_STATE_DORMANT, &dev->state);
893 static inline int netif_oper_up(const struct net_device *dev) {
894 return (dev->operstate == IF_OPER_UP ||
895 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
899 static inline int netif_device_present(struct net_device *dev)
901 return test_bit(__LINK_STATE_PRESENT, &dev->state);
904 extern void netif_device_detach(struct net_device *dev);
906 extern void netif_device_attach(struct net_device *dev);
909 * Network interface message level settings
911 #define HAVE_NETIF_MSG 1
914 NETIF_MSG_DRV = 0x0001,
915 NETIF_MSG_PROBE = 0x0002,
916 NETIF_MSG_LINK = 0x0004,
917 NETIF_MSG_TIMER = 0x0008,
918 NETIF_MSG_IFDOWN = 0x0010,
919 NETIF_MSG_IFUP = 0x0020,
920 NETIF_MSG_RX_ERR = 0x0040,
921 NETIF_MSG_TX_ERR = 0x0080,
922 NETIF_MSG_TX_QUEUED = 0x0100,
923 NETIF_MSG_INTR = 0x0200,
924 NETIF_MSG_TX_DONE = 0x0400,
925 NETIF_MSG_RX_STATUS = 0x0800,
926 NETIF_MSG_PKTDATA = 0x1000,
927 NETIF_MSG_HW = 0x2000,
928 NETIF_MSG_WOL = 0x4000,
931 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
932 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
933 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
934 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
935 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
936 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
937 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
938 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
939 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
940 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
941 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
942 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
943 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
944 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
945 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
947 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
950 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
951 return default_msg_enable_bits;
952 if (debug_value == 0) /* no output */
955 return (1 << debug_value) - 1;
958 /* Test if receive needs to be scheduled */
959 static inline int __netif_rx_schedule_prep(struct net_device *dev)
961 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
964 /* Test if receive needs to be scheduled but only if up */
965 static inline int netif_rx_schedule_prep(struct net_device *dev)
967 return netif_running(dev) && __netif_rx_schedule_prep(dev);
970 /* Add interface to tail of rx poll list. This assumes that _prep has
971 * already been called and returned 1.
974 extern void __netif_rx_schedule(struct net_device *dev);
976 /* Try to reschedule poll. Called by irq handler. */
978 static inline void netif_rx_schedule(struct net_device *dev)
980 if (netif_rx_schedule_prep(dev))
981 __netif_rx_schedule(dev);
984 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
985 * Do not inline this?
987 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
989 if (netif_rx_schedule_prep(dev)) {
994 local_irq_save(flags);
995 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
996 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
997 local_irq_restore(flags);
1003 /* same as netif_rx_complete, except that local_irq_save(flags)
1004 * has already been issued
1006 static inline void __netif_rx_complete(struct net_device *dev)
1008 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
1009 list_del(&dev->poll_list);
1010 smp_mb__before_clear_bit();
1011 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
1014 /* Remove interface from poll list: it must be in the poll list
1015 * on current cpu. This primitive is called by dev->poll(), when
1016 * it completes the work. The device cannot be out of poll list at this
1017 * moment, it is BUG().
1019 static inline void netif_rx_complete(struct net_device *dev)
1021 unsigned long flags;
1023 local_irq_save(flags);
1024 __netif_rx_complete(dev);
1025 local_irq_restore(flags);
1028 static inline void netif_poll_disable(struct net_device *dev)
1030 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1032 schedule_timeout_interruptible(1);
1035 static inline void netif_poll_enable(struct net_device *dev)
1037 smp_mb__before_clear_bit();
1038 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
1041 static inline void netif_tx_lock(struct net_device *dev)
1043 spin_lock(&dev->_xmit_lock);
1044 dev->xmit_lock_owner = smp_processor_id();
1047 static inline void netif_tx_lock_bh(struct net_device *dev)
1049 spin_lock_bh(&dev->_xmit_lock);
1050 dev->xmit_lock_owner = smp_processor_id();
1053 static inline int netif_tx_trylock(struct net_device *dev)
1055 int ok = spin_trylock(&dev->_xmit_lock);
1057 dev->xmit_lock_owner = smp_processor_id();
1061 static inline void netif_tx_unlock(struct net_device *dev)
1063 dev->xmit_lock_owner = -1;
1064 spin_unlock(&dev->_xmit_lock);
1067 static inline void netif_tx_unlock_bh(struct net_device *dev)
1069 dev->xmit_lock_owner = -1;
1070 spin_unlock_bh(&dev->_xmit_lock);
1073 static inline void netif_tx_disable(struct net_device *dev)
1075 netif_tx_lock_bh(dev);
1076 netif_stop_queue(dev);
1077 netif_tx_unlock_bh(dev);
1080 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1082 extern void ether_setup(struct net_device *dev);
1084 /* Support for loadable net-drivers */
1085 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1086 void (*setup)(struct net_device *),
1087 unsigned int queue_count);
1088 #define alloc_netdev(sizeof_priv, name, setup) \
1089 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1090 extern int register_netdev(struct net_device *dev);
1091 extern void unregister_netdev(struct net_device *dev);
1092 /* Functions used for secondary unicast and multicast support */
1093 extern void dev_set_rx_mode(struct net_device *dev);
1094 extern void __dev_set_rx_mode(struct net_device *dev);
1095 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1096 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1097 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1098 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1099 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1100 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1101 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1102 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1103 extern void dev_set_promiscuity(struct net_device *dev, int inc);
1104 extern void dev_set_allmulti(struct net_device *dev, int inc);
1105 extern void netdev_state_change(struct net_device *dev);
1106 extern void netdev_features_change(struct net_device *dev);
1107 /* Load a device via the kmod */
1108 extern void dev_load(const char *name);
1109 extern void dev_mcast_init(void);
1110 extern int netdev_max_backlog;
1111 extern int weight_p;
1112 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1113 extern int skb_checksum_help(struct sk_buff *skb);
1114 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1116 extern void netdev_rx_csum_fault(struct net_device *dev);
1118 static inline void netdev_rx_csum_fault(struct net_device *dev)
1122 /* rx skb timestamps */
1123 extern void net_enable_timestamp(void);
1124 extern void net_disable_timestamp(void);
1126 #ifdef CONFIG_PROC_FS
1127 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1128 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1129 extern void dev_seq_stop(struct seq_file *seq, void *v);
1132 extern void linkwatch_run_queue(void);
1134 static inline int net_gso_ok(int features, int gso_type)
1136 int feature = gso_type << NETIF_F_GSO_SHIFT;
1137 return (features & feature) == feature;
1140 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1142 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1145 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1147 return skb_is_gso(skb) &&
1148 (!skb_gso_ok(skb, dev->features) ||
1149 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1152 /* On bonding slaves other than the currently active slave, suppress
1153 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1154 * ARP on active-backup slaves with arp_validate enabled.
1156 static inline int skb_bond_should_drop(struct sk_buff *skb)
1158 struct net_device *dev = skb->dev;
1159 struct net_device *master = dev->master;
1162 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1163 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1164 skb->protocol == __constant_htons(ETH_P_ARP))
1167 if (master->priv_flags & IFF_MASTER_ALB) {
1168 if (skb->pkt_type != PACKET_BROADCAST &&
1169 skb->pkt_type != PACKET_MULTICAST)
1172 if (master->priv_flags & IFF_MASTER_8023AD &&
1173 skb->protocol == __constant_htons(ETH_P_SLOW))
1181 #endif /* __KERNEL__ */
1183 #endif /* _LINUX_DEV_H */