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 */
602 unsigned int promiscuity;
603 unsigned int allmulti;
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 struct garp_port *garp_port;
746 /* class/net/name entry */
748 /* space for optional statistics and wireless sysfs groups */
749 struct attribute_group *sysfs_groups[3];
751 /* rtnetlink link ops */
752 const struct rtnl_link_ops *rtnl_link_ops;
754 /* VLAN feature mask */
755 unsigned long vlan_features;
757 /* for setting kernel sock attribute on TCP connection setup */
758 #define GSO_MAX_SIZE 65536
759 unsigned int gso_max_size;
761 /* The TX queue control structures */
762 unsigned int egress_subqueue_count;
763 struct net_device_subqueue egress_subqueue[1];
765 #define to_net_dev(d) container_of(d, struct net_device, dev)
767 #define NETDEV_ALIGN 32
768 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
771 * Net namespace inlines
774 struct net *dev_net(const struct net_device *dev)
784 void dev_net_set(struct net_device *dev, struct net *net)
787 release_net(dev->nd_net);
788 dev->nd_net = hold_net(net);
793 * netdev_priv - access network device private data
794 * @dev: network device
796 * Get network device private data
798 static inline void *netdev_priv(const struct net_device *dev)
803 /* Set the sysfs physical device reference for the network logical device
804 * if set prior to registration will cause a symlink during initialization.
806 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
809 * netif_napi_add - initialize a napi context
810 * @dev: network device
811 * @napi: napi context
812 * @poll: polling function
813 * @weight: default weight
815 * netif_napi_add() must be used to initialize a napi context prior to calling
816 * *any* of the other napi related functions.
818 static inline void netif_napi_add(struct net_device *dev,
819 struct napi_struct *napi,
820 int (*poll)(struct napi_struct *, int),
823 INIT_LIST_HEAD(&napi->poll_list);
825 napi->weight = weight;
826 #ifdef CONFIG_NETPOLL
828 list_add(&napi->dev_list, &dev->napi_list);
829 spin_lock_init(&napi->poll_lock);
830 napi->poll_owner = -1;
832 set_bit(NAPI_STATE_SCHED, &napi->state);
836 __be16 type; /* This is really htons(ether_type). */
837 struct net_device *dev; /* NULL is wildcarded here */
838 int (*func) (struct sk_buff *,
840 struct packet_type *,
841 struct net_device *);
842 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
844 int (*gso_send_check)(struct sk_buff *skb);
845 void *af_packet_priv;
846 struct list_head list;
849 #include <linux/interrupt.h>
850 #include <linux/notifier.h>
852 extern rwlock_t dev_base_lock; /* Device list lock */
855 #define for_each_netdev(net, d) \
856 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
857 #define for_each_netdev_safe(net, d, n) \
858 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
859 #define for_each_netdev_continue(net, d) \
860 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
861 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
863 static inline struct net_device *next_net_device(struct net_device *dev)
865 struct list_head *lh;
869 lh = dev->dev_list.next;
870 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
873 static inline struct net_device *first_net_device(struct net *net)
875 return list_empty(&net->dev_base_head) ? NULL :
876 net_device_entry(net->dev_base_head.next);
879 extern int netdev_boot_setup_check(struct net_device *dev);
880 extern unsigned long netdev_boot_base(const char *prefix, int unit);
881 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
882 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
883 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
884 extern void dev_add_pack(struct packet_type *pt);
885 extern void dev_remove_pack(struct packet_type *pt);
886 extern void __dev_remove_pack(struct packet_type *pt);
888 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
889 unsigned short mask);
890 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
891 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
892 extern int dev_alloc_name(struct net_device *dev, const char *name);
893 extern int dev_open(struct net_device *dev);
894 extern int dev_close(struct net_device *dev);
895 extern void dev_disable_lro(struct net_device *dev);
896 extern int dev_queue_xmit(struct sk_buff *skb);
897 extern int register_netdevice(struct net_device *dev);
898 extern void unregister_netdevice(struct net_device *dev);
899 extern void free_netdev(struct net_device *dev);
900 extern void synchronize_net(void);
901 extern int register_netdevice_notifier(struct notifier_block *nb);
902 extern int unregister_netdevice_notifier(struct notifier_block *nb);
903 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
904 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
905 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
906 extern int dev_restart(struct net_device *dev);
907 #ifdef CONFIG_NETPOLL_TRAP
908 extern int netpoll_trap(void);
911 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
913 const void *daddr, const void *saddr,
916 if (!dev->header_ops || !dev->header_ops->create)
919 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
922 static inline int dev_parse_header(const struct sk_buff *skb,
923 unsigned char *haddr)
925 const struct net_device *dev = skb->dev;
927 if (!dev->header_ops || !dev->header_ops->parse)
929 return dev->header_ops->parse(skb, haddr);
932 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
933 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
934 static inline int unregister_gifconf(unsigned int family)
936 return register_gifconf(family, NULL);
940 * Incoming packets are placed on per-cpu queues so that
941 * no locking is needed.
945 struct net_device *output_queue;
946 struct sk_buff_head input_pkt_queue;
947 struct list_head poll_list;
948 struct sk_buff *completion_queue;
950 struct napi_struct backlog;
951 #ifdef CONFIG_NET_DMA
952 struct dma_chan *net_dma;
956 DECLARE_PER_CPU(struct softnet_data,softnet_data);
958 #define HAVE_NETIF_QUEUE
960 extern void __netif_schedule(struct net_device *dev);
962 static inline void netif_schedule(struct net_device *dev)
964 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
965 __netif_schedule(dev);
969 * netif_start_queue - allow transmit
970 * @dev: network device
972 * Allow upper layers to call the device hard_start_xmit routine.
974 static inline void netif_start_queue(struct net_device *dev)
976 clear_bit(__LINK_STATE_XOFF, &dev->state);
980 * netif_wake_queue - restart transmit
981 * @dev: network device
983 * Allow upper layers to call the device hard_start_xmit routine.
984 * Used for flow control when transmit resources are available.
986 static inline void netif_wake_queue(struct net_device *dev)
988 #ifdef CONFIG_NETPOLL_TRAP
989 if (netpoll_trap()) {
990 clear_bit(__LINK_STATE_XOFF, &dev->state);
994 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
995 __netif_schedule(dev);
999 * netif_stop_queue - stop transmitted packets
1000 * @dev: network device
1002 * Stop upper layers calling the device hard_start_xmit routine.
1003 * Used for flow control when transmit resources are unavailable.
1005 static inline void netif_stop_queue(struct net_device *dev)
1007 set_bit(__LINK_STATE_XOFF, &dev->state);
1011 * netif_queue_stopped - test if transmit queue is flowblocked
1012 * @dev: network device
1014 * Test if transmit queue on device is currently unable to send.
1016 static inline int netif_queue_stopped(const struct net_device *dev)
1018 return test_bit(__LINK_STATE_XOFF, &dev->state);
1022 * netif_running - test if up
1023 * @dev: network device
1025 * Test if the device has been brought up.
1027 static inline int netif_running(const struct net_device *dev)
1029 return test_bit(__LINK_STATE_START, &dev->state);
1033 * Routines to manage the subqueues on a device. We only need start
1034 * stop, and a check if it's stopped. All other device management is
1035 * done at the overall netdevice level.
1036 * Also test the device if we're multiqueue.
1040 * netif_start_subqueue - allow sending packets on subqueue
1041 * @dev: network device
1042 * @queue_index: sub queue index
1044 * Start individual transmit queue of a device with multiple transmit queues.
1046 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1048 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1049 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1054 * netif_stop_subqueue - stop sending packets on subqueue
1055 * @dev: network device
1056 * @queue_index: sub queue index
1058 * Stop individual transmit queue of a device with multiple transmit queues.
1060 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1062 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1063 #ifdef CONFIG_NETPOLL_TRAP
1067 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1072 * netif_subqueue_stopped - test status of subqueue
1073 * @dev: network device
1074 * @queue_index: sub queue index
1076 * Check individual transmit queue of a device with multiple transmit queues.
1078 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1081 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1082 return test_bit(__LINK_STATE_XOFF,
1083 &dev->egress_subqueue[queue_index].state);
1089 static inline int netif_subqueue_stopped(const struct net_device *dev,
1090 struct sk_buff *skb)
1092 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1096 * netif_wake_subqueue - allow sending packets on subqueue
1097 * @dev: network device
1098 * @queue_index: sub queue index
1100 * Resume individual transmit queue of a device with multiple transmit queues.
1102 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1104 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1105 #ifdef CONFIG_NETPOLL_TRAP
1109 if (test_and_clear_bit(__LINK_STATE_XOFF,
1110 &dev->egress_subqueue[queue_index].state))
1111 __netif_schedule(dev);
1116 * netif_is_multiqueue - test if device has multiple transmit queues
1117 * @dev: network device
1119 * Check if device has multiple transmit queues
1120 * Always falls if NETDEVICE_MULTIQUEUE is not configured
1122 static inline int netif_is_multiqueue(const struct net_device *dev)
1124 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
1125 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
1131 /* Use this variant when it is known for sure that it
1132 * is executing from hardware interrupt context or with hardware interrupts
1135 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1137 /* Use this variant in places where it could be invoked
1138 * from either hardware interrupt or other context, with hardware interrupts
1139 * either disabled or enabled.
1141 extern void dev_kfree_skb_any(struct sk_buff *skb);
1143 #define HAVE_NETIF_RX 1
1144 extern int netif_rx(struct sk_buff *skb);
1145 extern int netif_rx_ni(struct sk_buff *skb);
1146 #define HAVE_NETIF_RECEIVE_SKB 1
1147 extern int netif_receive_skb(struct sk_buff *skb);
1148 extern int dev_valid_name(const char *name);
1149 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1150 extern int dev_ethtool(struct net *net, struct ifreq *);
1151 extern unsigned dev_get_flags(const struct net_device *);
1152 extern int dev_change_flags(struct net_device *, unsigned);
1153 extern int dev_change_name(struct net_device *, char *);
1154 extern int dev_change_net_namespace(struct net_device *,
1155 struct net *, const char *);
1156 extern int dev_set_mtu(struct net_device *, int);
1157 extern int dev_set_mac_address(struct net_device *,
1159 extern int dev_hard_start_xmit(struct sk_buff *skb,
1160 struct net_device *dev);
1162 extern int netdev_budget;
1164 /* Called by rtnetlink.c:rtnl_unlock() */
1165 extern void netdev_run_todo(void);
1168 * dev_put - release reference to device
1169 * @dev: network device
1171 * Release reference to device to allow it to be freed.
1173 static inline void dev_put(struct net_device *dev)
1175 atomic_dec(&dev->refcnt);
1179 * dev_hold - get reference to device
1180 * @dev: network device
1182 * Hold reference to device to keep it from being freed.
1184 static inline void dev_hold(struct net_device *dev)
1186 atomic_inc(&dev->refcnt);
1189 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1190 * and _off may be called from IRQ context, but it is caller
1191 * who is responsible for serialization of these calls.
1193 * The name carrier is inappropriate, these functions should really be
1194 * called netif_lowerlayer_*() because they represent the state of any
1195 * kind of lower layer not just hardware media.
1198 extern void linkwatch_fire_event(struct net_device *dev);
1201 * netif_carrier_ok - test if carrier present
1202 * @dev: network device
1204 * Check if carrier is present on device
1206 static inline int netif_carrier_ok(const struct net_device *dev)
1208 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1211 extern void __netdev_watchdog_up(struct net_device *dev);
1213 extern void netif_carrier_on(struct net_device *dev);
1215 extern void netif_carrier_off(struct net_device *dev);
1218 * netif_dormant_on - mark device as dormant.
1219 * @dev: network device
1221 * Mark device as dormant (as per RFC2863).
1223 * The dormant state indicates that the relevant interface is not
1224 * actually in a condition to pass packets (i.e., it is not 'up') but is
1225 * in a "pending" state, waiting for some external event. For "on-
1226 * demand" interfaces, this new state identifies the situation where the
1227 * interface is waiting for events to place it in the up state.
1230 static inline void netif_dormant_on(struct net_device *dev)
1232 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1233 linkwatch_fire_event(dev);
1237 * netif_dormant_off - set device as not dormant.
1238 * @dev: network device
1240 * Device is not in dormant state.
1242 static inline void netif_dormant_off(struct net_device *dev)
1244 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1245 linkwatch_fire_event(dev);
1249 * netif_dormant - test if carrier present
1250 * @dev: network device
1252 * Check if carrier is present on device
1254 static inline int netif_dormant(const struct net_device *dev)
1256 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1261 * netif_oper_up - test if device is operational
1262 * @dev: network device
1264 * Check if carrier is operational
1266 static inline int netif_oper_up(const struct net_device *dev) {
1267 return (dev->operstate == IF_OPER_UP ||
1268 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1272 * netif_device_present - is device available or removed
1273 * @dev: network device
1275 * Check if device has not been removed from system.
1277 static inline int netif_device_present(struct net_device *dev)
1279 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1282 extern void netif_device_detach(struct net_device *dev);
1284 extern void netif_device_attach(struct net_device *dev);
1287 * Network interface message level settings
1289 #define HAVE_NETIF_MSG 1
1292 NETIF_MSG_DRV = 0x0001,
1293 NETIF_MSG_PROBE = 0x0002,
1294 NETIF_MSG_LINK = 0x0004,
1295 NETIF_MSG_TIMER = 0x0008,
1296 NETIF_MSG_IFDOWN = 0x0010,
1297 NETIF_MSG_IFUP = 0x0020,
1298 NETIF_MSG_RX_ERR = 0x0040,
1299 NETIF_MSG_TX_ERR = 0x0080,
1300 NETIF_MSG_TX_QUEUED = 0x0100,
1301 NETIF_MSG_INTR = 0x0200,
1302 NETIF_MSG_TX_DONE = 0x0400,
1303 NETIF_MSG_RX_STATUS = 0x0800,
1304 NETIF_MSG_PKTDATA = 0x1000,
1305 NETIF_MSG_HW = 0x2000,
1306 NETIF_MSG_WOL = 0x4000,
1309 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1310 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1311 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1312 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1313 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1314 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1315 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1316 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1317 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1318 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1319 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1320 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1321 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1322 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1323 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1325 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1328 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1329 return default_msg_enable_bits;
1330 if (debug_value == 0) /* no output */
1332 /* set low N bits */
1333 return (1 << debug_value) - 1;
1336 /* Test if receive needs to be scheduled but only if up */
1337 static inline int netif_rx_schedule_prep(struct net_device *dev,
1338 struct napi_struct *napi)
1340 return napi_schedule_prep(napi);
1343 /* Add interface to tail of rx poll list. This assumes that _prep has
1344 * already been called and returned 1.
1346 static inline void __netif_rx_schedule(struct net_device *dev,
1347 struct napi_struct *napi)
1349 __napi_schedule(napi);
1352 /* Try to reschedule poll. Called by irq handler. */
1354 static inline void netif_rx_schedule(struct net_device *dev,
1355 struct napi_struct *napi)
1357 if (netif_rx_schedule_prep(dev, napi))
1358 __netif_rx_schedule(dev, napi);
1361 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1362 static inline int netif_rx_reschedule(struct net_device *dev,
1363 struct napi_struct *napi)
1365 if (napi_schedule_prep(napi)) {
1366 __netif_rx_schedule(dev, napi);
1372 /* same as netif_rx_complete, except that local_irq_save(flags)
1373 * has already been issued
1375 static inline void __netif_rx_complete(struct net_device *dev,
1376 struct napi_struct *napi)
1378 __napi_complete(napi);
1381 /* Remove interface from poll list: it must be in the poll list
1382 * on current cpu. This primitive is called by dev->poll(), when
1383 * it completes the work. The device cannot be out of poll list at this
1384 * moment, it is BUG().
1386 static inline void netif_rx_complete(struct net_device *dev,
1387 struct napi_struct *napi)
1389 unsigned long flags;
1391 local_irq_save(flags);
1392 __netif_rx_complete(dev, napi);
1393 local_irq_restore(flags);
1397 * netif_tx_lock - grab network device transmit lock
1398 * @dev: network device
1399 * @cpu: cpu number of lock owner
1401 * Get network device transmit lock
1403 static inline void __netif_tx_lock(struct net_device *dev, int cpu)
1405 spin_lock(&dev->_xmit_lock);
1406 dev->xmit_lock_owner = cpu;
1409 static inline void netif_tx_lock(struct net_device *dev)
1411 __netif_tx_lock(dev, smp_processor_id());
1414 static inline void netif_tx_lock_bh(struct net_device *dev)
1416 spin_lock_bh(&dev->_xmit_lock);
1417 dev->xmit_lock_owner = smp_processor_id();
1420 static inline int netif_tx_trylock(struct net_device *dev)
1422 int ok = spin_trylock(&dev->_xmit_lock);
1424 dev->xmit_lock_owner = smp_processor_id();
1428 static inline void netif_tx_unlock(struct net_device *dev)
1430 dev->xmit_lock_owner = -1;
1431 spin_unlock(&dev->_xmit_lock);
1434 static inline void netif_tx_unlock_bh(struct net_device *dev)
1436 dev->xmit_lock_owner = -1;
1437 spin_unlock_bh(&dev->_xmit_lock);
1440 #define HARD_TX_LOCK(dev, cpu) { \
1441 if ((dev->features & NETIF_F_LLTX) == 0) { \
1442 __netif_tx_lock(dev, cpu); \
1446 #define HARD_TX_UNLOCK(dev) { \
1447 if ((dev->features & NETIF_F_LLTX) == 0) { \
1448 netif_tx_unlock(dev); \
1452 static inline void netif_tx_disable(struct net_device *dev)
1454 netif_tx_lock_bh(dev);
1455 netif_stop_queue(dev);
1456 netif_tx_unlock_bh(dev);
1459 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1461 extern void ether_setup(struct net_device *dev);
1463 /* Support for loadable net-drivers */
1464 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1465 void (*setup)(struct net_device *),
1466 unsigned int queue_count);
1467 #define alloc_netdev(sizeof_priv, name, setup) \
1468 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1469 extern int register_netdev(struct net_device *dev);
1470 extern void unregister_netdev(struct net_device *dev);
1471 /* Functions used for secondary unicast and multicast support */
1472 extern void dev_set_rx_mode(struct net_device *dev);
1473 extern void __dev_set_rx_mode(struct net_device *dev);
1474 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1475 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1476 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1477 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1478 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1479 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1480 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1481 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1482 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1483 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1484 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1485 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1486 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1487 extern int dev_set_allmulti(struct net_device *dev, int inc);
1488 extern void netdev_state_change(struct net_device *dev);
1489 extern void netdev_bonding_change(struct net_device *dev);
1490 extern void netdev_features_change(struct net_device *dev);
1491 /* Load a device via the kmod */
1492 extern void dev_load(struct net *net, const char *name);
1493 extern void dev_mcast_init(void);
1494 extern int netdev_max_backlog;
1495 extern int weight_p;
1496 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1497 extern int skb_checksum_help(struct sk_buff *skb);
1498 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1500 extern void netdev_rx_csum_fault(struct net_device *dev);
1502 static inline void netdev_rx_csum_fault(struct net_device *dev)
1506 /* rx skb timestamps */
1507 extern void net_enable_timestamp(void);
1508 extern void net_disable_timestamp(void);
1510 #ifdef CONFIG_PROC_FS
1511 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1512 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1513 extern void dev_seq_stop(struct seq_file *seq, void *v);
1516 extern int netdev_class_create_file(struct class_attribute *class_attr);
1517 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1519 extern void linkwatch_run_queue(void);
1521 extern int netdev_compute_features(unsigned long all, unsigned long one);
1523 static inline int net_gso_ok(int features, int gso_type)
1525 int feature = gso_type << NETIF_F_GSO_SHIFT;
1526 return (features & feature) == feature;
1529 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1531 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1534 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1536 return skb_is_gso(skb) &&
1537 (!skb_gso_ok(skb, dev->features) ||
1538 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1541 static inline void netif_set_gso_max_size(struct net_device *dev,
1544 dev->gso_max_size = size;
1547 /* On bonding slaves other than the currently active slave, suppress
1548 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1549 * ARP on active-backup slaves with arp_validate enabled.
1551 static inline int skb_bond_should_drop(struct sk_buff *skb)
1553 struct net_device *dev = skb->dev;
1554 struct net_device *master = dev->master;
1557 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1558 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1559 skb->protocol == __constant_htons(ETH_P_ARP))
1562 if (master->priv_flags & IFF_MASTER_ALB) {
1563 if (skb->pkt_type != PACKET_BROADCAST &&
1564 skb->pkt_type != PACKET_MULTICAST)
1567 if (master->priv_flags & IFF_MASTER_8023AD &&
1568 skb->protocol == __constant_htons(ETH_P_SLOW))
1576 #endif /* __KERNEL__ */
1578 #endif /* _LINUX_DEV_H */