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 <linux/delay.h>
35 #include <asm/atomic.h>
36 #include <asm/cache.h>
37 #include <asm/byteorder.h>
39 #include <linux/device.h>
40 #include <linux/percpu.h>
41 #include <linux/dmaengine.h>
42 #include <linux/workqueue.h>
44 #include <net/net_namespace.h>
51 /* source back-compat hooks */
52 #define SET_ETHTOOL_OPS(netdev,ops) \
53 ( (netdev)->ethtool_ops = (ops) )
55 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
56 functions are available. */
57 #define HAVE_FREE_NETDEV /* free_netdev() */
58 #define HAVE_NETDEV_PRIV /* netdev_priv() */
60 #define NET_XMIT_SUCCESS 0
61 #define NET_XMIT_DROP 1 /* skb dropped */
62 #define NET_XMIT_CN 2 /* congestion notification */
63 #define NET_XMIT_POLICED 3 /* skb is shot by police */
64 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
65 (TC use only - dev_queue_xmit
66 returns this as NET_XMIT_SUCCESS) */
68 /* Backlog congestion levels */
69 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70 #define NET_RX_DROP 1 /* packet dropped */
71 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
72 #define NET_RX_CN_MOD 3 /* Storm on its way! */
73 #define NET_RX_CN_HIGH 4 /* The storm is here */
74 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
76 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
77 * indicates that the device will soon be dropping packets, or already drops
78 * some packets of the same priority; prompting us to send less aggressively. */
79 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
80 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
84 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
86 /* Driver transmit return codes */
87 #define NETDEV_TX_OK 0 /* driver took care of packet */
88 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
89 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
94 * Compute the worst case header length according to the protocols
98 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
99 # if defined(CONFIG_MAC80211_MESH)
100 # define LL_MAX_HEADER 128
102 # define LL_MAX_HEADER 96
104 #elif defined(CONFIG_TR)
105 # define LL_MAX_HEADER 48
107 # define LL_MAX_HEADER 32
110 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
111 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
112 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
113 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
114 #define MAX_HEADER LL_MAX_HEADER
116 #define MAX_HEADER (LL_MAX_HEADER + 48)
119 #endif /* __KERNEL__ */
121 struct net_device_subqueue
123 /* Give a control state for each queue. This struct may contain
124 * per-queue locks in the future.
130 * Network device statistics. Akin to the 2.0 ether stats but
131 * with byte counters.
134 struct net_device_stats
136 unsigned long rx_packets; /* total packets received */
137 unsigned long tx_packets; /* total packets transmitted */
138 unsigned long rx_bytes; /* total bytes received */
139 unsigned long tx_bytes; /* total bytes transmitted */
140 unsigned long rx_errors; /* bad packets received */
141 unsigned long tx_errors; /* packet transmit problems */
142 unsigned long rx_dropped; /* no space in linux buffers */
143 unsigned long tx_dropped; /* no space available in linux */
144 unsigned long multicast; /* multicast packets received */
145 unsigned long collisions;
147 /* detailed rx_errors: */
148 unsigned long rx_length_errors;
149 unsigned long rx_over_errors; /* receiver ring buff overflow */
150 unsigned long rx_crc_errors; /* recved pkt with crc error */
151 unsigned long rx_frame_errors; /* recv'd frame alignment error */
152 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
153 unsigned long rx_missed_errors; /* receiver missed packet */
155 /* detailed tx_errors */
156 unsigned long tx_aborted_errors;
157 unsigned long tx_carrier_errors;
158 unsigned long tx_fifo_errors;
159 unsigned long tx_heartbeat_errors;
160 unsigned long tx_window_errors;
163 unsigned long rx_compressed;
164 unsigned long tx_compressed;
168 /* Media selection options. */
181 #include <linux/cache.h>
182 #include <linux/skbuff.h>
188 struct netif_rx_stats
192 unsigned time_squeeze;
193 unsigned cpu_collision;
196 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
200 struct dev_addr_list *next;
201 u8 da_addr[MAX_ADDR_LEN];
209 * We tag multicasts with these structures.
212 #define dev_mc_list dev_addr_list
213 #define dmi_addr da_addr
214 #define dmi_addrlen da_addrlen
215 #define dmi_users da_users
216 #define dmi_gusers da_gusers
220 struct hh_cache *hh_next; /* Next entry */
221 atomic_t hh_refcnt; /* number of users */
223 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
225 * They are mostly read, but hh_refcnt may be changed quite frequently,
226 * incurring cache line ping pongs.
228 __be16 hh_type ____cacheline_aligned_in_smp;
229 /* protocol identifier, f.e ETH_P_IP
230 * NOTE: For VLANs, this will be the
231 * encapuslated type. --BLG
233 u16 hh_len; /* length of header */
234 int (*hh_output)(struct sk_buff *skb);
237 /* cached hardware header; allow for machine alignment needs. */
238 #define HH_DATA_MOD 16
239 #define HH_DATA_OFF(__len) \
240 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
241 #define HH_DATA_ALIGN(__len) \
242 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
243 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
246 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
248 * dev->hard_header_len ? (dev->hard_header_len +
249 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
251 * We could use other alignment values, but we must maintain the
252 * relationship HH alignment <= LL alignment.
254 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
257 #define LL_RESERVED_SPACE(dev) \
258 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
260 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
261 #define LL_ALLOCATED_SPACE(dev) \
262 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
265 int (*create) (struct sk_buff *skb, struct net_device *dev,
266 unsigned short type, const void *daddr,
267 const void *saddr, unsigned len);
268 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
269 int (*rebuild)(struct sk_buff *skb);
270 #define HAVE_HEADER_CACHE
271 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
272 void (*cache_update)(struct hh_cache *hh,
273 const struct net_device *dev,
274 const unsigned char *haddr);
277 /* These flag bits are private to the generic network queueing
278 * layer, they may not be explicitly referenced by any other
286 __LINK_STATE_PRESENT,
288 __LINK_STATE_NOCARRIER,
289 __LINK_STATE_LINKWATCH_PENDING,
290 __LINK_STATE_DORMANT,
291 __LINK_STATE_QDISC_RUNNING,
296 * This structure holds at boot time configured netdevice settings. They
297 * are then used in the device probing.
299 struct netdev_boot_setup {
303 #define NETDEV_BOOT_SETUP_MAX 8
305 extern int __init netdev_boot_setup(char *str);
308 * Structure for NAPI scheduling similar to tasklet but with weighting
311 /* The poll_list must only be managed by the entity which
312 * changes the state of the NAPI_STATE_SCHED bit. This means
313 * whoever atomically sets that bit can add this napi_struct
314 * to the per-cpu poll_list, and whoever clears that bit
315 * can remove from the list right before clearing the bit.
317 struct list_head poll_list;
321 int (*poll)(struct napi_struct *, int);
322 #ifdef CONFIG_NETPOLL
323 spinlock_t poll_lock;
325 struct net_device *dev;
326 struct list_head dev_list;
332 NAPI_STATE_SCHED, /* Poll is scheduled */
333 NAPI_STATE_DISABLE, /* Disable pending */
336 extern void __napi_schedule(struct napi_struct *n);
338 static inline int napi_disable_pending(struct napi_struct *n)
340 return test_bit(NAPI_STATE_DISABLE, &n->state);
344 * napi_schedule_prep - check if napi can be scheduled
347 * Test if NAPI routine is already running, and if not mark
348 * it as running. This is used as a condition variable
349 * insure only one NAPI poll instance runs. We also make
350 * sure there is no pending NAPI disable.
352 static inline int napi_schedule_prep(struct napi_struct *n)
354 return !napi_disable_pending(n) &&
355 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
359 * napi_schedule - schedule NAPI poll
362 * Schedule NAPI poll routine to be called if it is not already
365 static inline void napi_schedule(struct napi_struct *n)
367 if (napi_schedule_prep(n))
371 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
372 static inline int napi_reschedule(struct napi_struct *napi)
374 if (napi_schedule_prep(napi)) {
375 __napi_schedule(napi);
382 * napi_complete - NAPI processing complete
385 * Mark NAPI processing as complete.
387 static inline void __napi_complete(struct napi_struct *n)
389 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
390 list_del(&n->poll_list);
391 smp_mb__before_clear_bit();
392 clear_bit(NAPI_STATE_SCHED, &n->state);
395 static inline void napi_complete(struct napi_struct *n)
399 local_irq_save(flags);
401 local_irq_restore(flags);
405 * napi_disable - prevent NAPI from scheduling
408 * Stop NAPI from being scheduled on this context.
409 * Waits till any outstanding processing completes.
411 static inline void napi_disable(struct napi_struct *n)
413 set_bit(NAPI_STATE_DISABLE, &n->state);
414 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
416 clear_bit(NAPI_STATE_DISABLE, &n->state);
420 * napi_enable - enable NAPI scheduling
423 * Resume NAPI from being scheduled on this context.
424 * Must be paired with napi_disable.
426 static inline void napi_enable(struct napi_struct *n)
428 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
429 smp_mb__before_clear_bit();
430 clear_bit(NAPI_STATE_SCHED, &n->state);
435 * napi_synchronize - wait until NAPI is not running
438 * Wait until NAPI is done being scheduled on this context.
439 * Waits till any outstanding processing completes but
440 * does not disable future activations.
442 static inline void napi_synchronize(const struct napi_struct *n)
444 while (test_bit(NAPI_STATE_SCHED, &n->state))
448 # define napi_synchronize(n) barrier()
451 struct netdev_queue {
453 struct net_device *dev;
457 * The DEVICE structure.
458 * Actually, this whole structure is a big mistake. It mixes I/O
459 * data with strictly "high-level" data, and it has to know about
460 * almost every data structure used in the INET module.
462 * FIXME: cleanup struct net_device such that network protocol info
470 * This is the first field of the "visible" part of this structure
471 * (i.e. as seen by users in the "Space.c" file). It is the name
475 /* device name hash chain */
476 struct hlist_node name_hlist;
479 * I/O specific fields
480 * FIXME: Merge these and struct ifmap into one
482 unsigned long mem_end; /* shared mem end */
483 unsigned long mem_start; /* shared mem start */
484 unsigned long base_addr; /* device I/O address */
485 unsigned int irq; /* device IRQ number */
488 * Some hardware also needs these fields, but they are not
489 * part of the usual set specified in Space.c.
492 unsigned char if_port; /* Selectable AUI, TP,..*/
493 unsigned char dma; /* DMA channel */
497 struct list_head dev_list;
498 #ifdef CONFIG_NETPOLL
499 struct list_head napi_list;
502 /* The device initialization function. Called only once. */
503 int (*init)(struct net_device *dev);
505 /* ------- Fields preinitialized in Space.c finish here ------- */
507 /* Net device features */
508 unsigned long features;
509 #define NETIF_F_SG 1 /* Scatter/gather IO. */
510 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
511 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
512 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
513 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
514 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
515 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
516 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
517 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
518 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
519 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
520 #define NETIF_F_GSO 2048 /* Enable software GSO. */
521 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
522 /* do not use LLTX in new drivers */
523 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
524 #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
525 #define NETIF_F_LRO 32768 /* large receive offload */
527 /* Segmentation offload features */
528 #define NETIF_F_GSO_SHIFT 16
529 #define NETIF_F_GSO_MASK 0xffff0000
530 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
531 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
532 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
533 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
534 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
536 /* List of features with software fallbacks. */
537 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
540 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
541 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
542 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
543 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
545 struct net_device *next_sched;
547 /* Interface index. Unique device identifier */
552 struct net_device_stats* (*get_stats)(struct net_device *dev);
553 struct net_device_stats stats;
555 #ifdef CONFIG_WIRELESS_EXT
556 /* List of functions to handle Wireless Extensions (instead of ioctl).
557 * See <net/iw_handler.h> for details. Jean II */
558 const struct iw_handler_def * wireless_handlers;
559 /* Instance data managed by the core of Wireless Extensions. */
560 struct iw_public_data * wireless_data;
562 const struct ethtool_ops *ethtool_ops;
564 /* Hardware header description */
565 const struct header_ops *header_ops;
568 * This marks the end of the "visible" part of the structure. All
569 * fields hereafter are internal to the system, and may change at
570 * will (read: may be cleaned up at will).
574 unsigned int flags; /* interface flags (a la BSD) */
575 unsigned short gflags;
576 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
577 unsigned short padded; /* How much padding added by alloc_netdev() */
579 unsigned char operstate; /* RFC2863 operstate */
580 unsigned char link_mode; /* mapping policy to operstate */
582 unsigned mtu; /* interface MTU value */
583 unsigned short type; /* interface hardware type */
584 unsigned short hard_header_len; /* hardware hdr length */
586 /* extra head- and tailroom the hardware may need, but not in all cases
587 * can this be guaranteed, especially tailroom. Some cases also use
588 * LL_MAX_HEADER instead to allocate the skb.
590 unsigned short needed_headroom;
591 unsigned short needed_tailroom;
593 struct net_device *master; /* Pointer to master device of a group,
594 * which this device is member of.
597 /* Interface address info. */
598 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
599 unsigned char addr_len; /* hardware address length */
600 unsigned short dev_id; /* for shared network cards */
602 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
603 int uc_count; /* Number of installed ucasts */
605 struct dev_addr_list *mc_list; /* Multicast mac addresses */
606 int mc_count; /* Number of installed mcasts */
607 unsigned int promiscuity;
608 unsigned int allmulti;
611 /* Protocol specific pointers */
613 void *atalk_ptr; /* AppleTalk link */
614 void *ip_ptr; /* IPv4 specific data */
615 void *dn_ptr; /* DECnet specific data */
616 void *ip6_ptr; /* IPv6 specific data */
617 void *ec_ptr; /* Econet specific data */
618 void *ax25_ptr; /* AX.25 specific data */
619 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
620 assign before registering */
623 * Cache line mostly used on receive path (including eth_type_trans())
625 unsigned long last_rx; /* Time of last Rx */
626 /* Interface address info used in eth_type_trans() */
627 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
628 because most packets are unicast) */
630 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
632 struct netdev_queue rx_queue;
633 struct netdev_queue tx_queue ____cacheline_aligned_in_smp;
635 struct Qdisc *qdisc_ingress;
638 * Cache line mostly used on queue transmit path (qdisc)
640 /* device queue lock */
642 struct Qdisc *qdisc_sleeping;
643 struct list_head qdisc_list;
644 unsigned long tx_queue_len; /* Max frames per queue allowed */
646 /* Partially transmitted GSO packet. */
647 struct sk_buff *gso_skb;
650 * One part is mostly used on xmit path (device)
652 /* hard_start_xmit synchronizer */
653 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
654 /* cpu id of processor entered to hard_start_xmit or -1,
655 if nobody entered there.
658 void *priv; /* pointer to private data */
659 int (*hard_start_xmit) (struct sk_buff *skb,
660 struct net_device *dev);
661 /* These may be needed for future network-power-down code. */
662 unsigned long trans_start; /* Time (in jiffies) of last Tx */
664 int watchdog_timeo; /* used by dev_watchdog() */
665 struct timer_list watchdog_timer;
668 * refcnt is a very hot point, so align it on SMP
670 /* Number of references to this device */
671 atomic_t refcnt ____cacheline_aligned_in_smp;
673 /* delayed register/unregister */
674 struct list_head todo_list;
675 /* device index hash chain */
676 struct hlist_node index_hlist;
678 struct net_device *link_watch_next;
680 /* register/unregister state machine */
681 enum { NETREG_UNINITIALIZED=0,
682 NETREG_REGISTERED, /* completed register_netdevice */
683 NETREG_UNREGISTERING, /* called unregister_netdevice */
684 NETREG_UNREGISTERED, /* completed unregister todo */
685 NETREG_RELEASED, /* called free_netdev */
688 /* Called after device is detached from network. */
689 void (*uninit)(struct net_device *dev);
690 /* Called after last user reference disappears. */
691 void (*destructor)(struct net_device *dev);
693 /* Pointers to interface service routines. */
694 int (*open)(struct net_device *dev);
695 int (*stop)(struct net_device *dev);
696 #define HAVE_NETDEV_POLL
697 #define HAVE_CHANGE_RX_FLAGS
698 void (*change_rx_flags)(struct net_device *dev,
700 #define HAVE_SET_RX_MODE
701 void (*set_rx_mode)(struct net_device *dev);
702 #define HAVE_MULTICAST
703 void (*set_multicast_list)(struct net_device *dev);
704 #define HAVE_SET_MAC_ADDR
705 int (*set_mac_address)(struct net_device *dev,
707 #define HAVE_VALIDATE_ADDR
708 int (*validate_addr)(struct net_device *dev);
709 #define HAVE_PRIVATE_IOCTL
710 int (*do_ioctl)(struct net_device *dev,
711 struct ifreq *ifr, int cmd);
712 #define HAVE_SET_CONFIG
713 int (*set_config)(struct net_device *dev,
715 #define HAVE_CHANGE_MTU
716 int (*change_mtu)(struct net_device *dev, int new_mtu);
718 #define HAVE_TX_TIMEOUT
719 void (*tx_timeout) (struct net_device *dev);
721 void (*vlan_rx_register)(struct net_device *dev,
722 struct vlan_group *grp);
723 void (*vlan_rx_add_vid)(struct net_device *dev,
725 void (*vlan_rx_kill_vid)(struct net_device *dev,
728 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
729 #ifdef CONFIG_NETPOLL
730 struct netpoll_info *npinfo;
732 #ifdef CONFIG_NET_POLL_CONTROLLER
733 void (*poll_controller)(struct net_device *dev);
737 /* Network namespace this network device is inside */
741 /* mid-layer private */
745 struct net_bridge_port *br_port;
747 struct macvlan_port *macvlan_port;
749 struct garp_port *garp_port;
751 /* class/net/name entry */
753 /* space for optional statistics and wireless sysfs groups */
754 struct attribute_group *sysfs_groups[3];
756 /* rtnetlink link ops */
757 const struct rtnl_link_ops *rtnl_link_ops;
759 /* VLAN feature mask */
760 unsigned long vlan_features;
762 /* for setting kernel sock attribute on TCP connection setup */
763 #define GSO_MAX_SIZE 65536
764 unsigned int gso_max_size;
766 /* The TX queue control structures */
767 unsigned int egress_subqueue_count;
768 struct net_device_subqueue egress_subqueue[1];
770 #define to_net_dev(d) container_of(d, struct net_device, dev)
772 #define NETDEV_ALIGN 32
773 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
776 * Net namespace inlines
779 struct net *dev_net(const struct net_device *dev)
789 void dev_net_set(struct net_device *dev, struct net *net)
792 release_net(dev->nd_net);
793 dev->nd_net = hold_net(net);
798 * netdev_priv - access network device private data
799 * @dev: network device
801 * Get network device private data
803 static inline void *netdev_priv(const struct net_device *dev)
808 /* Set the sysfs physical device reference for the network logical device
809 * if set prior to registration will cause a symlink during initialization.
811 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
814 * netif_napi_add - initialize a napi context
815 * @dev: network device
816 * @napi: napi context
817 * @poll: polling function
818 * @weight: default weight
820 * netif_napi_add() must be used to initialize a napi context prior to calling
821 * *any* of the other napi related functions.
823 static inline void netif_napi_add(struct net_device *dev,
824 struct napi_struct *napi,
825 int (*poll)(struct napi_struct *, int),
828 INIT_LIST_HEAD(&napi->poll_list);
830 napi->weight = weight;
831 #ifdef CONFIG_NETPOLL
833 list_add(&napi->dev_list, &dev->napi_list);
834 spin_lock_init(&napi->poll_lock);
835 napi->poll_owner = -1;
837 set_bit(NAPI_STATE_SCHED, &napi->state);
841 __be16 type; /* This is really htons(ether_type). */
842 struct net_device *dev; /* NULL is wildcarded here */
843 int (*func) (struct sk_buff *,
845 struct packet_type *,
846 struct net_device *);
847 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
849 int (*gso_send_check)(struct sk_buff *skb);
850 void *af_packet_priv;
851 struct list_head list;
854 #include <linux/interrupt.h>
855 #include <linux/notifier.h>
857 extern rwlock_t dev_base_lock; /* Device list lock */
860 #define for_each_netdev(net, d) \
861 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
862 #define for_each_netdev_safe(net, d, n) \
863 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
864 #define for_each_netdev_continue(net, d) \
865 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
866 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
868 static inline struct net_device *next_net_device(struct net_device *dev)
870 struct list_head *lh;
874 lh = dev->dev_list.next;
875 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
878 static inline struct net_device *first_net_device(struct net *net)
880 return list_empty(&net->dev_base_head) ? NULL :
881 net_device_entry(net->dev_base_head.next);
884 extern int netdev_boot_setup_check(struct net_device *dev);
885 extern unsigned long netdev_boot_base(const char *prefix, int unit);
886 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
887 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
888 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
889 extern void dev_add_pack(struct packet_type *pt);
890 extern void dev_remove_pack(struct packet_type *pt);
891 extern void __dev_remove_pack(struct packet_type *pt);
893 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
894 unsigned short mask);
895 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
896 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
897 extern int dev_alloc_name(struct net_device *dev, const char *name);
898 extern int dev_open(struct net_device *dev);
899 extern int dev_close(struct net_device *dev);
900 extern void dev_disable_lro(struct net_device *dev);
901 extern int dev_queue_xmit(struct sk_buff *skb);
902 extern int register_netdevice(struct net_device *dev);
903 extern void unregister_netdevice(struct net_device *dev);
904 extern void free_netdev(struct net_device *dev);
905 extern void synchronize_net(void);
906 extern int register_netdevice_notifier(struct notifier_block *nb);
907 extern int unregister_netdevice_notifier(struct notifier_block *nb);
908 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
909 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
910 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
911 extern int dev_restart(struct net_device *dev);
912 #ifdef CONFIG_NETPOLL_TRAP
913 extern int netpoll_trap(void);
916 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
918 const void *daddr, const void *saddr,
921 if (!dev->header_ops || !dev->header_ops->create)
924 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
927 static inline int dev_parse_header(const struct sk_buff *skb,
928 unsigned char *haddr)
930 const struct net_device *dev = skb->dev;
932 if (!dev->header_ops || !dev->header_ops->parse)
934 return dev->header_ops->parse(skb, haddr);
937 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
938 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
939 static inline int unregister_gifconf(unsigned int family)
941 return register_gifconf(family, NULL);
945 * Incoming packets are placed on per-cpu queues so that
946 * no locking is needed.
950 struct net_device *output_queue;
951 struct sk_buff_head input_pkt_queue;
952 struct list_head poll_list;
953 struct sk_buff *completion_queue;
955 struct napi_struct backlog;
956 #ifdef CONFIG_NET_DMA
957 struct dma_chan *net_dma;
961 DECLARE_PER_CPU(struct softnet_data,softnet_data);
963 #define HAVE_NETIF_QUEUE
965 extern void __netif_schedule(struct net_device *dev);
967 static inline void netif_schedule(struct net_device *dev)
969 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
970 __netif_schedule(dev);
974 * netif_start_queue - allow transmit
975 * @dev: network device
977 * Allow upper layers to call the device hard_start_xmit routine.
979 static inline void netif_start_queue(struct net_device *dev)
981 clear_bit(__LINK_STATE_XOFF, &dev->state);
985 * netif_wake_queue - restart transmit
986 * @dev: network device
988 * Allow upper layers to call the device hard_start_xmit routine.
989 * Used for flow control when transmit resources are available.
991 static inline void netif_wake_queue(struct net_device *dev)
993 #ifdef CONFIG_NETPOLL_TRAP
994 if (netpoll_trap()) {
995 clear_bit(__LINK_STATE_XOFF, &dev->state);
999 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
1000 __netif_schedule(dev);
1004 * netif_stop_queue - stop transmitted packets
1005 * @dev: network device
1007 * Stop upper layers calling the device hard_start_xmit routine.
1008 * Used for flow control when transmit resources are unavailable.
1010 static inline void netif_stop_queue(struct net_device *dev)
1012 set_bit(__LINK_STATE_XOFF, &dev->state);
1016 * netif_queue_stopped - test if transmit queue is flowblocked
1017 * @dev: network device
1019 * Test if transmit queue on device is currently unable to send.
1021 static inline int netif_queue_stopped(const struct net_device *dev)
1023 return test_bit(__LINK_STATE_XOFF, &dev->state);
1027 * netif_running - test if up
1028 * @dev: network device
1030 * Test if the device has been brought up.
1032 static inline int netif_running(const struct net_device *dev)
1034 return test_bit(__LINK_STATE_START, &dev->state);
1038 * Routines to manage the subqueues on a device. We only need start
1039 * stop, and a check if it's stopped. All other device management is
1040 * done at the overall netdevice level.
1041 * Also test the device if we're multiqueue.
1045 * netif_start_subqueue - allow sending packets on subqueue
1046 * @dev: network device
1047 * @queue_index: sub queue index
1049 * Start individual transmit queue of a device with multiple transmit queues.
1051 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1053 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1054 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1059 * netif_stop_subqueue - stop sending packets on subqueue
1060 * @dev: network device
1061 * @queue_index: sub queue index
1063 * Stop individual transmit queue of a device with multiple transmit queues.
1065 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1067 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1068 #ifdef CONFIG_NETPOLL_TRAP
1072 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1077 * netif_subqueue_stopped - test status of subqueue
1078 * @dev: network device
1079 * @queue_index: sub queue index
1081 * Check individual transmit queue of a device with multiple transmit queues.
1083 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1086 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1087 return test_bit(__LINK_STATE_XOFF,
1088 &dev->egress_subqueue[queue_index].state);
1094 static inline int netif_subqueue_stopped(const struct net_device *dev,
1095 struct sk_buff *skb)
1097 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1101 * netif_wake_subqueue - allow sending packets on subqueue
1102 * @dev: network device
1103 * @queue_index: sub queue index
1105 * Resume individual transmit queue of a device with multiple transmit queues.
1107 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1109 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1110 #ifdef CONFIG_NETPOLL_TRAP
1114 if (test_and_clear_bit(__LINK_STATE_XOFF,
1115 &dev->egress_subqueue[queue_index].state))
1116 __netif_schedule(dev);
1121 * netif_is_multiqueue - test if device has multiple transmit queues
1122 * @dev: network device
1124 * Check if device has multiple transmit queues
1125 * Always falls if NETDEVICE_MULTIQUEUE is not configured
1127 static inline int netif_is_multiqueue(const struct net_device *dev)
1129 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1130 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
1136 /* Use this variant when it is known for sure that it
1137 * is executing from hardware interrupt context or with hardware interrupts
1140 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1142 /* Use this variant in places where it could be invoked
1143 * from either hardware interrupt or other context, with hardware interrupts
1144 * either disabled or enabled.
1146 extern void dev_kfree_skb_any(struct sk_buff *skb);
1148 #define HAVE_NETIF_RX 1
1149 extern int netif_rx(struct sk_buff *skb);
1150 extern int netif_rx_ni(struct sk_buff *skb);
1151 #define HAVE_NETIF_RECEIVE_SKB 1
1152 extern int netif_receive_skb(struct sk_buff *skb);
1153 extern int dev_valid_name(const char *name);
1154 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1155 extern int dev_ethtool(struct net *net, struct ifreq *);
1156 extern unsigned dev_get_flags(const struct net_device *);
1157 extern int dev_change_flags(struct net_device *, unsigned);
1158 extern int dev_change_name(struct net_device *, char *);
1159 extern int dev_change_net_namespace(struct net_device *,
1160 struct net *, const char *);
1161 extern int dev_set_mtu(struct net_device *, int);
1162 extern int dev_set_mac_address(struct net_device *,
1164 extern int dev_hard_start_xmit(struct sk_buff *skb,
1165 struct net_device *dev);
1167 extern int netdev_budget;
1169 /* Called by rtnetlink.c:rtnl_unlock() */
1170 extern void netdev_run_todo(void);
1173 * dev_put - release reference to device
1174 * @dev: network device
1176 * Release reference to device to allow it to be freed.
1178 static inline void dev_put(struct net_device *dev)
1180 atomic_dec(&dev->refcnt);
1184 * dev_hold - get reference to device
1185 * @dev: network device
1187 * Hold reference to device to keep it from being freed.
1189 static inline void dev_hold(struct net_device *dev)
1191 atomic_inc(&dev->refcnt);
1194 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1195 * and _off may be called from IRQ context, but it is caller
1196 * who is responsible for serialization of these calls.
1198 * The name carrier is inappropriate, these functions should really be
1199 * called netif_lowerlayer_*() because they represent the state of any
1200 * kind of lower layer not just hardware media.
1203 extern void linkwatch_fire_event(struct net_device *dev);
1206 * netif_carrier_ok - test if carrier present
1207 * @dev: network device
1209 * Check if carrier is present on device
1211 static inline int netif_carrier_ok(const struct net_device *dev)
1213 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1216 extern void __netdev_watchdog_up(struct net_device *dev);
1218 extern void netif_carrier_on(struct net_device *dev);
1220 extern void netif_carrier_off(struct net_device *dev);
1223 * netif_dormant_on - mark device as dormant.
1224 * @dev: network device
1226 * Mark device as dormant (as per RFC2863).
1228 * The dormant state indicates that the relevant interface is not
1229 * actually in a condition to pass packets (i.e., it is not 'up') but is
1230 * in a "pending" state, waiting for some external event. For "on-
1231 * demand" interfaces, this new state identifies the situation where the
1232 * interface is waiting for events to place it in the up state.
1235 static inline void netif_dormant_on(struct net_device *dev)
1237 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1238 linkwatch_fire_event(dev);
1242 * netif_dormant_off - set device as not dormant.
1243 * @dev: network device
1245 * Device is not in dormant state.
1247 static inline void netif_dormant_off(struct net_device *dev)
1249 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1250 linkwatch_fire_event(dev);
1254 * netif_dormant - test if carrier present
1255 * @dev: network device
1257 * Check if carrier is present on device
1259 static inline int netif_dormant(const struct net_device *dev)
1261 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1266 * netif_oper_up - test if device is operational
1267 * @dev: network device
1269 * Check if carrier is operational
1271 static inline int netif_oper_up(const struct net_device *dev) {
1272 return (dev->operstate == IF_OPER_UP ||
1273 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1277 * netif_device_present - is device available or removed
1278 * @dev: network device
1280 * Check if device has not been removed from system.
1282 static inline int netif_device_present(struct net_device *dev)
1284 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1287 extern void netif_device_detach(struct net_device *dev);
1289 extern void netif_device_attach(struct net_device *dev);
1292 * Network interface message level settings
1294 #define HAVE_NETIF_MSG 1
1297 NETIF_MSG_DRV = 0x0001,
1298 NETIF_MSG_PROBE = 0x0002,
1299 NETIF_MSG_LINK = 0x0004,
1300 NETIF_MSG_TIMER = 0x0008,
1301 NETIF_MSG_IFDOWN = 0x0010,
1302 NETIF_MSG_IFUP = 0x0020,
1303 NETIF_MSG_RX_ERR = 0x0040,
1304 NETIF_MSG_TX_ERR = 0x0080,
1305 NETIF_MSG_TX_QUEUED = 0x0100,
1306 NETIF_MSG_INTR = 0x0200,
1307 NETIF_MSG_TX_DONE = 0x0400,
1308 NETIF_MSG_RX_STATUS = 0x0800,
1309 NETIF_MSG_PKTDATA = 0x1000,
1310 NETIF_MSG_HW = 0x2000,
1311 NETIF_MSG_WOL = 0x4000,
1314 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1315 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1316 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1317 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1318 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1319 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1320 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1321 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1322 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1323 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1324 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1325 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1326 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1327 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1328 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1330 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1333 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1334 return default_msg_enable_bits;
1335 if (debug_value == 0) /* no output */
1337 /* set low N bits */
1338 return (1 << debug_value) - 1;
1341 /* Test if receive needs to be scheduled but only if up */
1342 static inline int netif_rx_schedule_prep(struct net_device *dev,
1343 struct napi_struct *napi)
1345 return napi_schedule_prep(napi);
1348 /* Add interface to tail of rx poll list. This assumes that _prep has
1349 * already been called and returned 1.
1351 static inline void __netif_rx_schedule(struct net_device *dev,
1352 struct napi_struct *napi)
1354 __napi_schedule(napi);
1357 /* Try to reschedule poll. Called by irq handler. */
1359 static inline void netif_rx_schedule(struct net_device *dev,
1360 struct napi_struct *napi)
1362 if (netif_rx_schedule_prep(dev, napi))
1363 __netif_rx_schedule(dev, napi);
1366 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1367 static inline int netif_rx_reschedule(struct net_device *dev,
1368 struct napi_struct *napi)
1370 if (napi_schedule_prep(napi)) {
1371 __netif_rx_schedule(dev, napi);
1377 /* same as netif_rx_complete, except that local_irq_save(flags)
1378 * has already been issued
1380 static inline void __netif_rx_complete(struct net_device *dev,
1381 struct napi_struct *napi)
1383 __napi_complete(napi);
1386 /* Remove interface from poll list: it must be in the poll list
1387 * on current cpu. This primitive is called by dev->poll(), when
1388 * it completes the work. The device cannot be out of poll list at this
1389 * moment, it is BUG().
1391 static inline void netif_rx_complete(struct net_device *dev,
1392 struct napi_struct *napi)
1394 unsigned long flags;
1396 local_irq_save(flags);
1397 __netif_rx_complete(dev, napi);
1398 local_irq_restore(flags);
1402 * netif_tx_lock - grab network device transmit lock
1403 * @dev: network device
1404 * @cpu: cpu number of lock owner
1406 * Get network device transmit lock
1408 static inline void __netif_tx_lock(struct net_device *dev, int cpu)
1410 spin_lock(&dev->_xmit_lock);
1411 dev->xmit_lock_owner = cpu;
1414 static inline void netif_tx_lock(struct net_device *dev)
1416 __netif_tx_lock(dev, smp_processor_id());
1419 static inline void netif_tx_lock_bh(struct net_device *dev)
1421 spin_lock_bh(&dev->_xmit_lock);
1422 dev->xmit_lock_owner = smp_processor_id();
1425 static inline int netif_tx_trylock(struct net_device *dev)
1427 int ok = spin_trylock(&dev->_xmit_lock);
1429 dev->xmit_lock_owner = smp_processor_id();
1433 static inline void netif_tx_unlock(struct net_device *dev)
1435 dev->xmit_lock_owner = -1;
1436 spin_unlock(&dev->_xmit_lock);
1439 static inline void netif_tx_unlock_bh(struct net_device *dev)
1441 dev->xmit_lock_owner = -1;
1442 spin_unlock_bh(&dev->_xmit_lock);
1445 #define HARD_TX_LOCK(dev, cpu) { \
1446 if ((dev->features & NETIF_F_LLTX) == 0) { \
1447 __netif_tx_lock(dev, cpu); \
1451 #define HARD_TX_UNLOCK(dev) { \
1452 if ((dev->features & NETIF_F_LLTX) == 0) { \
1453 netif_tx_unlock(dev); \
1457 static inline void netif_tx_disable(struct net_device *dev)
1459 netif_tx_lock_bh(dev);
1460 netif_stop_queue(dev);
1461 netif_tx_unlock_bh(dev);
1464 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1466 extern void ether_setup(struct net_device *dev);
1468 /* Support for loadable net-drivers */
1469 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1470 void (*setup)(struct net_device *),
1471 unsigned int queue_count);
1472 #define alloc_netdev(sizeof_priv, name, setup) \
1473 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1474 extern int register_netdev(struct net_device *dev);
1475 extern void unregister_netdev(struct net_device *dev);
1476 /* Functions used for secondary unicast and multicast support */
1477 extern void dev_set_rx_mode(struct net_device *dev);
1478 extern void __dev_set_rx_mode(struct net_device *dev);
1479 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1480 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1481 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1482 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1483 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1484 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1485 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1486 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1487 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1488 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1489 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1490 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1491 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1492 extern int dev_set_allmulti(struct net_device *dev, int inc);
1493 extern void netdev_state_change(struct net_device *dev);
1494 extern void netdev_bonding_change(struct net_device *dev);
1495 extern void netdev_features_change(struct net_device *dev);
1496 /* Load a device via the kmod */
1497 extern void dev_load(struct net *net, const char *name);
1498 extern void dev_mcast_init(void);
1499 extern int netdev_max_backlog;
1500 extern int weight_p;
1501 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1502 extern int skb_checksum_help(struct sk_buff *skb);
1503 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1505 extern void netdev_rx_csum_fault(struct net_device *dev);
1507 static inline void netdev_rx_csum_fault(struct net_device *dev)
1511 /* rx skb timestamps */
1512 extern void net_enable_timestamp(void);
1513 extern void net_disable_timestamp(void);
1515 #ifdef CONFIG_PROC_FS
1516 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1517 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1518 extern void dev_seq_stop(struct seq_file *seq, void *v);
1521 extern int netdev_class_create_file(struct class_attribute *class_attr);
1522 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1524 extern void linkwatch_run_queue(void);
1526 extern int netdev_compute_features(unsigned long all, unsigned long one);
1528 static inline int net_gso_ok(int features, int gso_type)
1530 int feature = gso_type << NETIF_F_GSO_SHIFT;
1531 return (features & feature) == feature;
1534 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1536 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1539 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1541 return skb_is_gso(skb) &&
1542 (!skb_gso_ok(skb, dev->features) ||
1543 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1546 static inline void netif_set_gso_max_size(struct net_device *dev,
1549 dev->gso_max_size = size;
1552 /* On bonding slaves other than the currently active slave, suppress
1553 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1554 * ARP on active-backup slaves with arp_validate enabled.
1556 static inline int skb_bond_should_drop(struct sk_buff *skb)
1558 struct net_device *dev = skb->dev;
1559 struct net_device *master = dev->master;
1562 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1563 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1564 skb->protocol == __constant_htons(ETH_P_ARP))
1567 if (master->priv_flags & IFF_MASTER_ALB) {
1568 if (skb->pkt_type != PACKET_BROADCAST &&
1569 skb->pkt_type != PACKET_MULTICAST)
1572 if (master->priv_flags & IFF_MASTER_8023AD &&
1573 skb->protocol == __constant_htons(ETH_P_SLOW))
1581 #endif /* __KERNEL__ */
1583 #endif /* _LINUX_DEV_H */