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()
452 * The DEVICE structure.
453 * Actually, this whole structure is a big mistake. It mixes I/O
454 * data with strictly "high-level" data, and it has to know about
455 * almost every data structure used in the INET module.
457 * FIXME: cleanup struct net_device such that network protocol info
465 * This is the first field of the "visible" part of this structure
466 * (i.e. as seen by users in the "Space.c" file). It is the name
470 /* device name hash chain */
471 struct hlist_node name_hlist;
474 * I/O specific fields
475 * FIXME: Merge these and struct ifmap into one
477 unsigned long mem_end; /* shared mem end */
478 unsigned long mem_start; /* shared mem start */
479 unsigned long base_addr; /* device I/O address */
480 unsigned int irq; /* device IRQ number */
483 * Some hardware also needs these fields, but they are not
484 * part of the usual set specified in Space.c.
487 unsigned char if_port; /* Selectable AUI, TP,..*/
488 unsigned char dma; /* DMA channel */
492 struct list_head dev_list;
493 #ifdef CONFIG_NETPOLL
494 struct list_head napi_list;
497 /* The device initialization function. Called only once. */
498 int (*init)(struct net_device *dev);
500 /* ------- Fields preinitialized in Space.c finish here ------- */
502 /* Net device features */
503 unsigned long features;
504 #define NETIF_F_SG 1 /* Scatter/gather IO. */
505 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
506 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
507 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
508 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
509 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
510 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
511 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
512 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
513 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
514 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
515 #define NETIF_F_GSO 2048 /* Enable software GSO. */
516 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
517 /* do not use LLTX in new drivers */
518 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
519 #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
520 #define NETIF_F_LRO 32768 /* large receive offload */
522 /* Segmentation offload features */
523 #define NETIF_F_GSO_SHIFT 16
524 #define NETIF_F_GSO_MASK 0xffff0000
525 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
526 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
527 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
528 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
529 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
531 /* List of features with software fallbacks. */
532 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
535 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
536 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
537 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
538 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
540 struct net_device *next_sched;
542 /* Interface index. Unique device identifier */
547 struct net_device_stats* (*get_stats)(struct net_device *dev);
548 struct net_device_stats stats;
550 #ifdef CONFIG_WIRELESS_EXT
551 /* List of functions to handle Wireless Extensions (instead of ioctl).
552 * See <net/iw_handler.h> for details. Jean II */
553 const struct iw_handler_def * wireless_handlers;
554 /* Instance data managed by the core of Wireless Extensions. */
555 struct iw_public_data * wireless_data;
557 const struct ethtool_ops *ethtool_ops;
559 /* Hardware header description */
560 const struct header_ops *header_ops;
563 * This marks the end of the "visible" part of the structure. All
564 * fields hereafter are internal to the system, and may change at
565 * will (read: may be cleaned up at will).
569 unsigned int flags; /* interface flags (a la BSD) */
570 unsigned short gflags;
571 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
572 unsigned short padded; /* How much padding added by alloc_netdev() */
574 unsigned char operstate; /* RFC2863 operstate */
575 unsigned char link_mode; /* mapping policy to operstate */
577 unsigned mtu; /* interface MTU value */
578 unsigned short type; /* interface hardware type */
579 unsigned short hard_header_len; /* hardware hdr length */
581 /* extra head- and tailroom the hardware may need, but not in all cases
582 * can this be guaranteed, especially tailroom. Some cases also use
583 * LL_MAX_HEADER instead to allocate the skb.
585 unsigned short needed_headroom;
586 unsigned short needed_tailroom;
588 struct net_device *master; /* Pointer to master device of a group,
589 * which this device is member of.
592 /* Interface address info. */
593 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
594 unsigned char addr_len; /* hardware address length */
595 unsigned short dev_id; /* for shared network cards */
597 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
598 int uc_count; /* Number of installed ucasts */
600 struct dev_addr_list *mc_list; /* Multicast mac addresses */
601 int mc_count; /* Number of installed mcasts */
606 /* Protocol specific pointers */
608 void *atalk_ptr; /* AppleTalk link */
609 void *ip_ptr; /* IPv4 specific data */
610 void *dn_ptr; /* DECnet specific data */
611 void *ip6_ptr; /* IPv6 specific data */
612 void *ec_ptr; /* Econet specific data */
613 void *ax25_ptr; /* AX.25 specific data */
614 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
615 assign before registering */
618 * Cache line mostly used on receive path (including eth_type_trans())
620 unsigned long last_rx; /* Time of last Rx */
621 /* Interface address info used in eth_type_trans() */
622 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
623 because most packets are unicast) */
625 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
627 /* ingress path synchronizer */
628 spinlock_t ingress_lock;
629 struct Qdisc *qdisc_ingress;
632 * Cache line mostly used on queue transmit path (qdisc)
634 /* device queue lock */
635 spinlock_t queue_lock ____cacheline_aligned_in_smp;
637 struct Qdisc *qdisc_sleeping;
638 struct list_head qdisc_list;
639 unsigned long tx_queue_len; /* Max frames per queue allowed */
641 /* Partially transmitted GSO packet. */
642 struct sk_buff *gso_skb;
645 * One part is mostly used on xmit path (device)
647 /* hard_start_xmit synchronizer */
648 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
649 /* cpu id of processor entered to hard_start_xmit or -1,
650 if nobody entered there.
653 void *priv; /* pointer to private data */
654 int (*hard_start_xmit) (struct sk_buff *skb,
655 struct net_device *dev);
656 /* These may be needed for future network-power-down code. */
657 unsigned long trans_start; /* Time (in jiffies) of last Tx */
659 int watchdog_timeo; /* used by dev_watchdog() */
660 struct timer_list watchdog_timer;
663 * refcnt is a very hot point, so align it on SMP
665 /* Number of references to this device */
666 atomic_t refcnt ____cacheline_aligned_in_smp;
668 /* delayed register/unregister */
669 struct list_head todo_list;
670 /* device index hash chain */
671 struct hlist_node index_hlist;
673 struct net_device *link_watch_next;
675 /* register/unregister state machine */
676 enum { NETREG_UNINITIALIZED=0,
677 NETREG_REGISTERED, /* completed register_netdevice */
678 NETREG_UNREGISTERING, /* called unregister_netdevice */
679 NETREG_UNREGISTERED, /* completed unregister todo */
680 NETREG_RELEASED, /* called free_netdev */
683 /* Called after device is detached from network. */
684 void (*uninit)(struct net_device *dev);
685 /* Called after last user reference disappears. */
686 void (*destructor)(struct net_device *dev);
688 /* Pointers to interface service routines. */
689 int (*open)(struct net_device *dev);
690 int (*stop)(struct net_device *dev);
691 #define HAVE_NETDEV_POLL
692 #define HAVE_CHANGE_RX_FLAGS
693 void (*change_rx_flags)(struct net_device *dev,
695 #define HAVE_SET_RX_MODE
696 void (*set_rx_mode)(struct net_device *dev);
697 #define HAVE_MULTICAST
698 void (*set_multicast_list)(struct net_device *dev);
699 #define HAVE_SET_MAC_ADDR
700 int (*set_mac_address)(struct net_device *dev,
702 #define HAVE_VALIDATE_ADDR
703 int (*validate_addr)(struct net_device *dev);
704 #define HAVE_PRIVATE_IOCTL
705 int (*do_ioctl)(struct net_device *dev,
706 struct ifreq *ifr, int cmd);
707 #define HAVE_SET_CONFIG
708 int (*set_config)(struct net_device *dev,
710 #define HAVE_CHANGE_MTU
711 int (*change_mtu)(struct net_device *dev, int new_mtu);
713 #define HAVE_TX_TIMEOUT
714 void (*tx_timeout) (struct net_device *dev);
716 void (*vlan_rx_register)(struct net_device *dev,
717 struct vlan_group *grp);
718 void (*vlan_rx_add_vid)(struct net_device *dev,
720 void (*vlan_rx_kill_vid)(struct net_device *dev,
723 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
724 #ifdef CONFIG_NETPOLL
725 struct netpoll_info *npinfo;
727 #ifdef CONFIG_NET_POLL_CONTROLLER
728 void (*poll_controller)(struct net_device *dev);
732 /* Network namespace this network device is inside */
736 /* mid-layer private */
740 struct net_bridge_port *br_port;
742 struct macvlan_port *macvlan_port;
744 /* class/net/name entry */
746 /* space for optional statistics and wireless sysfs groups */
747 struct attribute_group *sysfs_groups[3];
749 /* rtnetlink link ops */
750 const struct rtnl_link_ops *rtnl_link_ops;
752 /* VLAN feature mask */
753 unsigned long vlan_features;
755 /* for setting kernel sock attribute on TCP connection setup */
756 #define GSO_MAX_SIZE 65536
757 unsigned int gso_max_size;
759 /* The TX queue control structures */
760 unsigned int egress_subqueue_count;
761 struct net_device_subqueue egress_subqueue[1];
763 #define to_net_dev(d) container_of(d, struct net_device, dev)
765 #define NETDEV_ALIGN 32
766 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
769 * Net namespace inlines
772 struct net *dev_net(const struct net_device *dev)
782 void dev_net_set(struct net_device *dev, struct net *net)
785 release_net(dev->nd_net);
786 dev->nd_net = hold_net(net);
791 * netdev_priv - access network device private data
792 * @dev: network device
794 * Get network device private data
796 static inline void *netdev_priv(const struct net_device *dev)
801 /* Set the sysfs physical device reference for the network logical device
802 * if set prior to registration will cause a symlink during initialization.
804 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
807 * netif_napi_add - initialize a napi context
808 * @dev: network device
809 * @napi: napi context
810 * @poll: polling function
811 * @weight: default weight
813 * netif_napi_add() must be used to initialize a napi context prior to calling
814 * *any* of the other napi related functions.
816 static inline void netif_napi_add(struct net_device *dev,
817 struct napi_struct *napi,
818 int (*poll)(struct napi_struct *, int),
821 INIT_LIST_HEAD(&napi->poll_list);
823 napi->weight = weight;
824 #ifdef CONFIG_NETPOLL
826 list_add(&napi->dev_list, &dev->napi_list);
827 spin_lock_init(&napi->poll_lock);
828 napi->poll_owner = -1;
830 set_bit(NAPI_STATE_SCHED, &napi->state);
834 __be16 type; /* This is really htons(ether_type). */
835 struct net_device *dev; /* NULL is wildcarded here */
836 int (*func) (struct sk_buff *,
838 struct packet_type *,
839 struct net_device *);
840 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
842 int (*gso_send_check)(struct sk_buff *skb);
843 void *af_packet_priv;
844 struct list_head list;
847 #include <linux/interrupt.h>
848 #include <linux/notifier.h>
850 extern rwlock_t dev_base_lock; /* Device list lock */
853 #define for_each_netdev(net, d) \
854 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
855 #define for_each_netdev_safe(net, d, n) \
856 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
857 #define for_each_netdev_continue(net, d) \
858 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
859 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
861 static inline struct net_device *next_net_device(struct net_device *dev)
863 struct list_head *lh;
867 lh = dev->dev_list.next;
868 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
871 static inline struct net_device *first_net_device(struct net *net)
873 return list_empty(&net->dev_base_head) ? NULL :
874 net_device_entry(net->dev_base_head.next);
877 extern int netdev_boot_setup_check(struct net_device *dev);
878 extern unsigned long netdev_boot_base(const char *prefix, int unit);
879 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
880 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
881 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
882 extern void dev_add_pack(struct packet_type *pt);
883 extern void dev_remove_pack(struct packet_type *pt);
884 extern void __dev_remove_pack(struct packet_type *pt);
886 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
887 unsigned short mask);
888 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
889 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
890 extern int dev_alloc_name(struct net_device *dev, const char *name);
891 extern int dev_open(struct net_device *dev);
892 extern int dev_close(struct net_device *dev);
893 extern int dev_queue_xmit(struct sk_buff *skb);
894 extern int register_netdevice(struct net_device *dev);
895 extern void unregister_netdevice(struct net_device *dev);
896 extern void free_netdev(struct net_device *dev);
897 extern void synchronize_net(void);
898 extern int register_netdevice_notifier(struct notifier_block *nb);
899 extern int unregister_netdevice_notifier(struct notifier_block *nb);
900 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
901 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
902 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
903 extern int dev_restart(struct net_device *dev);
904 #ifdef CONFIG_NETPOLL_TRAP
905 extern int netpoll_trap(void);
908 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
910 const void *daddr, const void *saddr,
913 if (!dev->header_ops || !dev->header_ops->create)
916 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
919 static inline int dev_parse_header(const struct sk_buff *skb,
920 unsigned char *haddr)
922 const struct net_device *dev = skb->dev;
924 if (!dev->header_ops || !dev->header_ops->parse)
926 return dev->header_ops->parse(skb, haddr);
929 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
930 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
931 static inline int unregister_gifconf(unsigned int family)
933 return register_gifconf(family, NULL);
937 * Incoming packets are placed on per-cpu queues so that
938 * no locking is needed.
942 struct net_device *output_queue;
943 struct sk_buff_head input_pkt_queue;
944 struct list_head poll_list;
945 struct sk_buff *completion_queue;
947 struct napi_struct backlog;
948 #ifdef CONFIG_NET_DMA
949 struct dma_chan *net_dma;
953 DECLARE_PER_CPU(struct softnet_data,softnet_data);
955 #define HAVE_NETIF_QUEUE
957 extern void __netif_schedule(struct net_device *dev);
959 static inline void netif_schedule(struct net_device *dev)
961 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
962 __netif_schedule(dev);
966 * netif_start_queue - allow transmit
967 * @dev: network device
969 * Allow upper layers to call the device hard_start_xmit routine.
971 static inline void netif_start_queue(struct net_device *dev)
973 clear_bit(__LINK_STATE_XOFF, &dev->state);
977 * netif_wake_queue - restart transmit
978 * @dev: network device
980 * Allow upper layers to call the device hard_start_xmit routine.
981 * Used for flow control when transmit resources are available.
983 static inline void netif_wake_queue(struct net_device *dev)
985 #ifdef CONFIG_NETPOLL_TRAP
986 if (netpoll_trap()) {
987 clear_bit(__LINK_STATE_XOFF, &dev->state);
991 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
992 __netif_schedule(dev);
996 * netif_stop_queue - stop transmitted packets
997 * @dev: network device
999 * Stop upper layers calling the device hard_start_xmit routine.
1000 * Used for flow control when transmit resources are unavailable.
1002 static inline void netif_stop_queue(struct net_device *dev)
1004 set_bit(__LINK_STATE_XOFF, &dev->state);
1008 * netif_queue_stopped - test if transmit queue is flowblocked
1009 * @dev: network device
1011 * Test if transmit queue on device is currently unable to send.
1013 static inline int netif_queue_stopped(const struct net_device *dev)
1015 return test_bit(__LINK_STATE_XOFF, &dev->state);
1019 * netif_running - test if up
1020 * @dev: network device
1022 * Test if the device has been brought up.
1024 static inline int netif_running(const struct net_device *dev)
1026 return test_bit(__LINK_STATE_START, &dev->state);
1030 * Routines to manage the subqueues on a device. We only need start
1031 * stop, and a check if it's stopped. All other device management is
1032 * done at the overall netdevice level.
1033 * Also test the device if we're multiqueue.
1037 * netif_start_subqueue - allow sending packets on subqueue
1038 * @dev: network device
1039 * @queue_index: sub queue index
1041 * Start individual transmit queue of a device with multiple transmit queues.
1043 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1045 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1046 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1051 * netif_stop_subqueue - stop sending packets on subqueue
1052 * @dev: network device
1053 * @queue_index: sub queue index
1055 * Stop individual transmit queue of a device with multiple transmit queues.
1057 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1059 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1060 #ifdef CONFIG_NETPOLL_TRAP
1064 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1069 * netif_subqueue_stopped - test status of subqueue
1070 * @dev: network device
1071 * @queue_index: sub queue index
1073 * Check individual transmit queue of a device with multiple transmit queues.
1075 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1078 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1079 return test_bit(__LINK_STATE_XOFF,
1080 &dev->egress_subqueue[queue_index].state);
1086 static inline int netif_subqueue_stopped(const struct net_device *dev,
1087 struct sk_buff *skb)
1089 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1093 * netif_wake_subqueue - allow sending packets on subqueue
1094 * @dev: network device
1095 * @queue_index: sub queue index
1097 * Resume individual transmit queue of a device with multiple transmit queues.
1099 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1101 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1102 #ifdef CONFIG_NETPOLL_TRAP
1106 if (test_and_clear_bit(__LINK_STATE_XOFF,
1107 &dev->egress_subqueue[queue_index].state))
1108 __netif_schedule(dev);
1113 * netif_is_multiqueue - test if device has multiple transmit queues
1114 * @dev: network device
1116 * Check if device has multiple transmit queues
1117 * Always falls if NETDEVICE_MULTIQUEUE is not configured
1119 static inline int netif_is_multiqueue(const struct net_device *dev)
1121 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1122 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
1128 /* Use this variant when it is known for sure that it
1129 * is executing from hardware interrupt context or with hardware interrupts
1132 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1134 /* Use this variant in places where it could be invoked
1135 * from either hardware interrupt or other context, with hardware interrupts
1136 * either disabled or enabled.
1138 extern void dev_kfree_skb_any(struct sk_buff *skb);
1140 #define HAVE_NETIF_RX 1
1141 extern int netif_rx(struct sk_buff *skb);
1142 extern int netif_rx_ni(struct sk_buff *skb);
1143 #define HAVE_NETIF_RECEIVE_SKB 1
1144 extern int netif_receive_skb(struct sk_buff *skb);
1145 extern int dev_valid_name(const char *name);
1146 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1147 extern int dev_ethtool(struct net *net, struct ifreq *);
1148 extern unsigned dev_get_flags(const struct net_device *);
1149 extern int dev_change_flags(struct net_device *, unsigned);
1150 extern int dev_change_name(struct net_device *, char *);
1151 extern int dev_change_net_namespace(struct net_device *,
1152 struct net *, const char *);
1153 extern int dev_set_mtu(struct net_device *, int);
1154 extern int dev_set_mac_address(struct net_device *,
1156 extern int dev_hard_start_xmit(struct sk_buff *skb,
1157 struct net_device *dev);
1159 extern int netdev_budget;
1161 /* Called by rtnetlink.c:rtnl_unlock() */
1162 extern void netdev_run_todo(void);
1165 * dev_put - release reference to device
1166 * @dev: network device
1168 * Release reference to device to allow it to be freed.
1170 static inline void dev_put(struct net_device *dev)
1172 atomic_dec(&dev->refcnt);
1176 * dev_hold - get reference to device
1177 * @dev: network device
1179 * Hold reference to device to keep it from being freed.
1181 static inline void dev_hold(struct net_device *dev)
1183 atomic_inc(&dev->refcnt);
1186 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1187 * and _off may be called from IRQ context, but it is caller
1188 * who is responsible for serialization of these calls.
1190 * The name carrier is inappropriate, these functions should really be
1191 * called netif_lowerlayer_*() because they represent the state of any
1192 * kind of lower layer not just hardware media.
1195 extern void linkwatch_fire_event(struct net_device *dev);
1198 * netif_carrier_ok - test if carrier present
1199 * @dev: network device
1201 * Check if carrier is present on device
1203 static inline int netif_carrier_ok(const struct net_device *dev)
1205 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1208 extern void __netdev_watchdog_up(struct net_device *dev);
1210 extern void netif_carrier_on(struct net_device *dev);
1212 extern void netif_carrier_off(struct net_device *dev);
1215 * netif_dormant_on - mark device as dormant.
1216 * @dev: network device
1218 * Mark device as dormant (as per RFC2863).
1220 * The dormant state indicates that the relevant interface is not
1221 * actually in a condition to pass packets (i.e., it is not 'up') but is
1222 * in a "pending" state, waiting for some external event. For "on-
1223 * demand" interfaces, this new state identifies the situation where the
1224 * interface is waiting for events to place it in the up state.
1227 static inline void netif_dormant_on(struct net_device *dev)
1229 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1230 linkwatch_fire_event(dev);
1234 * netif_dormant_off - set device as not dormant.
1235 * @dev: network device
1237 * Device is not in dormant state.
1239 static inline void netif_dormant_off(struct net_device *dev)
1241 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1242 linkwatch_fire_event(dev);
1246 * netif_dormant - test if carrier present
1247 * @dev: network device
1249 * Check if carrier is present on device
1251 static inline int netif_dormant(const struct net_device *dev)
1253 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1258 * netif_oper_up - test if device is operational
1259 * @dev: network device
1261 * Check if carrier is operational
1263 static inline int netif_oper_up(const struct net_device *dev) {
1264 return (dev->operstate == IF_OPER_UP ||
1265 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1269 * netif_device_present - is device available or removed
1270 * @dev: network device
1272 * Check if device has not been removed from system.
1274 static inline int netif_device_present(struct net_device *dev)
1276 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1279 extern void netif_device_detach(struct net_device *dev);
1281 extern void netif_device_attach(struct net_device *dev);
1284 * Network interface message level settings
1286 #define HAVE_NETIF_MSG 1
1289 NETIF_MSG_DRV = 0x0001,
1290 NETIF_MSG_PROBE = 0x0002,
1291 NETIF_MSG_LINK = 0x0004,
1292 NETIF_MSG_TIMER = 0x0008,
1293 NETIF_MSG_IFDOWN = 0x0010,
1294 NETIF_MSG_IFUP = 0x0020,
1295 NETIF_MSG_RX_ERR = 0x0040,
1296 NETIF_MSG_TX_ERR = 0x0080,
1297 NETIF_MSG_TX_QUEUED = 0x0100,
1298 NETIF_MSG_INTR = 0x0200,
1299 NETIF_MSG_TX_DONE = 0x0400,
1300 NETIF_MSG_RX_STATUS = 0x0800,
1301 NETIF_MSG_PKTDATA = 0x1000,
1302 NETIF_MSG_HW = 0x2000,
1303 NETIF_MSG_WOL = 0x4000,
1306 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1307 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1308 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1309 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1310 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1311 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1312 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1313 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1314 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1315 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1316 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1317 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1318 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1319 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1320 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1322 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1325 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1326 return default_msg_enable_bits;
1327 if (debug_value == 0) /* no output */
1329 /* set low N bits */
1330 return (1 << debug_value) - 1;
1333 /* Test if receive needs to be scheduled but only if up */
1334 static inline int netif_rx_schedule_prep(struct net_device *dev,
1335 struct napi_struct *napi)
1337 return napi_schedule_prep(napi);
1340 /* Add interface to tail of rx poll list. This assumes that _prep has
1341 * already been called and returned 1.
1343 static inline void __netif_rx_schedule(struct net_device *dev,
1344 struct napi_struct *napi)
1346 __napi_schedule(napi);
1349 /* Try to reschedule poll. Called by irq handler. */
1351 static inline void netif_rx_schedule(struct net_device *dev,
1352 struct napi_struct *napi)
1354 if (netif_rx_schedule_prep(dev, napi))
1355 __netif_rx_schedule(dev, napi);
1358 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1359 static inline int netif_rx_reschedule(struct net_device *dev,
1360 struct napi_struct *napi)
1362 if (napi_schedule_prep(napi)) {
1363 __netif_rx_schedule(dev, napi);
1369 /* same as netif_rx_complete, except that local_irq_save(flags)
1370 * has already been issued
1372 static inline void __netif_rx_complete(struct net_device *dev,
1373 struct napi_struct *napi)
1375 __napi_complete(napi);
1378 /* Remove interface from poll list: it must be in the poll list
1379 * on current cpu. This primitive is called by dev->poll(), when
1380 * it completes the work. The device cannot be out of poll list at this
1381 * moment, it is BUG().
1383 static inline void netif_rx_complete(struct net_device *dev,
1384 struct napi_struct *napi)
1386 unsigned long flags;
1388 local_irq_save(flags);
1389 __netif_rx_complete(dev, napi);
1390 local_irq_restore(flags);
1394 * netif_tx_lock - grab network device transmit lock
1395 * @dev: network device
1396 * @cpu: cpu number of lock owner
1398 * Get network device transmit lock
1400 static inline void __netif_tx_lock(struct net_device *dev, int cpu)
1402 spin_lock(&dev->_xmit_lock);
1403 dev->xmit_lock_owner = cpu;
1406 static inline void netif_tx_lock(struct net_device *dev)
1408 __netif_tx_lock(dev, smp_processor_id());
1411 static inline void netif_tx_lock_bh(struct net_device *dev)
1413 spin_lock_bh(&dev->_xmit_lock);
1414 dev->xmit_lock_owner = smp_processor_id();
1417 static inline int netif_tx_trylock(struct net_device *dev)
1419 int ok = spin_trylock(&dev->_xmit_lock);
1421 dev->xmit_lock_owner = smp_processor_id();
1425 static inline void netif_tx_unlock(struct net_device *dev)
1427 dev->xmit_lock_owner = -1;
1428 spin_unlock(&dev->_xmit_lock);
1431 static inline void netif_tx_unlock_bh(struct net_device *dev)
1433 dev->xmit_lock_owner = -1;
1434 spin_unlock_bh(&dev->_xmit_lock);
1437 #define HARD_TX_LOCK(dev, cpu) { \
1438 if ((dev->features & NETIF_F_LLTX) == 0) { \
1439 __netif_tx_lock(dev, cpu); \
1443 #define HARD_TX_UNLOCK(dev) { \
1444 if ((dev->features & NETIF_F_LLTX) == 0) { \
1445 netif_tx_unlock(dev); \
1449 static inline void netif_tx_disable(struct net_device *dev)
1451 netif_tx_lock_bh(dev);
1452 netif_stop_queue(dev);
1453 netif_tx_unlock_bh(dev);
1456 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1458 extern void ether_setup(struct net_device *dev);
1460 /* Support for loadable net-drivers */
1461 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1462 void (*setup)(struct net_device *),
1463 unsigned int queue_count);
1464 #define alloc_netdev(sizeof_priv, name, setup) \
1465 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1466 extern int register_netdev(struct net_device *dev);
1467 extern void unregister_netdev(struct net_device *dev);
1468 /* Functions used for secondary unicast and multicast support */
1469 extern void dev_set_rx_mode(struct net_device *dev);
1470 extern void __dev_set_rx_mode(struct net_device *dev);
1471 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1472 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1473 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1474 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1475 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1476 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1477 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1478 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1479 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1480 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1481 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1482 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1483 extern void dev_set_promiscuity(struct net_device *dev, int inc);
1484 extern void dev_set_allmulti(struct net_device *dev, int inc);
1485 extern void netdev_state_change(struct net_device *dev);
1486 extern void netdev_features_change(struct net_device *dev);
1487 /* Load a device via the kmod */
1488 extern void dev_load(struct net *net, const char *name);
1489 extern void dev_mcast_init(void);
1490 extern int netdev_max_backlog;
1491 extern int weight_p;
1492 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1493 extern int skb_checksum_help(struct sk_buff *skb);
1494 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1496 extern void netdev_rx_csum_fault(struct net_device *dev);
1498 static inline void netdev_rx_csum_fault(struct net_device *dev)
1502 /* rx skb timestamps */
1503 extern void net_enable_timestamp(void);
1504 extern void net_disable_timestamp(void);
1506 #ifdef CONFIG_PROC_FS
1507 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1508 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1509 extern void dev_seq_stop(struct seq_file *seq, void *v);
1512 extern void linkwatch_run_queue(void);
1514 extern int netdev_compute_features(unsigned long all, unsigned long one);
1516 static inline int net_gso_ok(int features, int gso_type)
1518 int feature = gso_type << NETIF_F_GSO_SHIFT;
1519 return (features & feature) == feature;
1522 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1524 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1527 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1529 return skb_is_gso(skb) &&
1530 (!skb_gso_ok(skb, dev->features) ||
1531 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1534 static inline void netif_set_gso_max_size(struct net_device *dev,
1537 dev->gso_max_size = size;
1540 /* On bonding slaves other than the currently active slave, suppress
1541 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1542 * ARP on active-backup slaves with arp_validate enabled.
1544 static inline int skb_bond_should_drop(struct sk_buff *skb)
1546 struct net_device *dev = skb->dev;
1547 struct net_device *master = dev->master;
1550 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1551 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1552 skb->protocol == __constant_htons(ETH_P_ARP))
1555 if (master->priv_flags & IFF_MASTER_ALB) {
1556 if (skb->pkt_type != PACKET_BROADCAST &&
1557 skb->pkt_type != PACKET_MULTICAST)
1560 if (master->priv_flags & IFF_MASTER_8023AD &&
1561 skb->protocol == __constant_htons(ETH_P_SLOW))
1569 #endif /* __KERNEL__ */
1571 #endif /* _LINUX_DEV_H */