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
285 __LINK_STATE_PRESENT,
287 __LINK_STATE_NOCARRIER,
288 __LINK_STATE_LINKWATCH_PENDING,
289 __LINK_STATE_DORMANT,
294 * This structure holds at boot time configured netdevice settings. They
295 * are then used in the device probing.
297 struct netdev_boot_setup {
301 #define NETDEV_BOOT_SETUP_MAX 8
303 extern int __init netdev_boot_setup(char *str);
306 * Structure for NAPI scheduling similar to tasklet but with weighting
309 /* The poll_list must only be managed by the entity which
310 * changes the state of the NAPI_STATE_SCHED bit. This means
311 * whoever atomically sets that bit can add this napi_struct
312 * to the per-cpu poll_list, and whoever clears that bit
313 * can remove from the list right before clearing the bit.
315 struct list_head poll_list;
319 int (*poll)(struct napi_struct *, int);
320 #ifdef CONFIG_NETPOLL
321 spinlock_t poll_lock;
323 struct net_device *dev;
324 struct list_head dev_list;
330 NAPI_STATE_SCHED, /* Poll is scheduled */
331 NAPI_STATE_DISABLE, /* Disable pending */
334 extern void __napi_schedule(struct napi_struct *n);
336 static inline int napi_disable_pending(struct napi_struct *n)
338 return test_bit(NAPI_STATE_DISABLE, &n->state);
342 * napi_schedule_prep - check if napi can be scheduled
345 * Test if NAPI routine is already running, and if not mark
346 * it as running. This is used as a condition variable
347 * insure only one NAPI poll instance runs. We also make
348 * sure there is no pending NAPI disable.
350 static inline int napi_schedule_prep(struct napi_struct *n)
352 return !napi_disable_pending(n) &&
353 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
357 * napi_schedule - schedule NAPI poll
360 * Schedule NAPI poll routine to be called if it is not already
363 static inline void napi_schedule(struct napi_struct *n)
365 if (napi_schedule_prep(n))
369 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
370 static inline int napi_reschedule(struct napi_struct *napi)
372 if (napi_schedule_prep(napi)) {
373 __napi_schedule(napi);
380 * napi_complete - NAPI processing complete
383 * Mark NAPI processing as complete.
385 static inline void __napi_complete(struct napi_struct *n)
387 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
388 list_del(&n->poll_list);
389 smp_mb__before_clear_bit();
390 clear_bit(NAPI_STATE_SCHED, &n->state);
393 static inline void napi_complete(struct napi_struct *n)
397 local_irq_save(flags);
399 local_irq_restore(flags);
403 * napi_disable - prevent NAPI from scheduling
406 * Stop NAPI from being scheduled on this context.
407 * Waits till any outstanding processing completes.
409 static inline void napi_disable(struct napi_struct *n)
411 set_bit(NAPI_STATE_DISABLE, &n->state);
412 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
414 clear_bit(NAPI_STATE_DISABLE, &n->state);
418 * napi_enable - enable NAPI scheduling
421 * Resume NAPI from being scheduled on this context.
422 * Must be paired with napi_disable.
424 static inline void napi_enable(struct napi_struct *n)
426 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
427 smp_mb__before_clear_bit();
428 clear_bit(NAPI_STATE_SCHED, &n->state);
433 * napi_synchronize - wait until NAPI is not running
436 * Wait until NAPI is done being scheduled on this context.
437 * Waits till any outstanding processing completes but
438 * does not disable future activations.
440 static inline void napi_synchronize(const struct napi_struct *n)
442 while (test_bit(NAPI_STATE_SCHED, &n->state))
446 # define napi_synchronize(n) barrier()
449 enum netdev_queue_state_t
452 __QUEUE_STATE_QDISC_RUNNING,
455 struct netdev_queue {
457 struct net_device *dev;
460 struct sk_buff *gso_skb;
461 spinlock_t _xmit_lock;
463 struct Qdisc *qdisc_sleeping;
464 struct list_head qdisc_list;
465 struct netdev_queue *next_sched;
466 } ____cacheline_aligned_in_smp;
469 * The DEVICE structure.
470 * Actually, this whole structure is a big mistake. It mixes I/O
471 * data with strictly "high-level" data, and it has to know about
472 * almost every data structure used in the INET module.
474 * FIXME: cleanup struct net_device such that network protocol info
482 * This is the first field of the "visible" part of this structure
483 * (i.e. as seen by users in the "Space.c" file). It is the name
487 /* device name hash chain */
488 struct hlist_node name_hlist;
491 * I/O specific fields
492 * FIXME: Merge these and struct ifmap into one
494 unsigned long mem_end; /* shared mem end */
495 unsigned long mem_start; /* shared mem start */
496 unsigned long base_addr; /* device I/O address */
497 unsigned int irq; /* device IRQ number */
500 * Some hardware also needs these fields, but they are not
501 * part of the usual set specified in Space.c.
504 unsigned char if_port; /* Selectable AUI, TP,..*/
505 unsigned char dma; /* DMA channel */
509 struct list_head dev_list;
510 #ifdef CONFIG_NETPOLL
511 struct list_head napi_list;
514 /* The device initialization function. Called only once. */
515 int (*init)(struct net_device *dev);
517 /* ------- Fields preinitialized in Space.c finish here ------- */
519 /* Net device features */
520 unsigned long features;
521 #define NETIF_F_SG 1 /* Scatter/gather IO. */
522 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
523 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
524 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
525 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
526 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
527 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
528 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
529 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
530 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
531 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
532 #define NETIF_F_GSO 2048 /* Enable software GSO. */
533 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
534 /* do not use LLTX in new drivers */
535 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
536 #define NETIF_F_LRO 32768 /* large receive offload */
538 /* Segmentation offload features */
539 #define NETIF_F_GSO_SHIFT 16
540 #define NETIF_F_GSO_MASK 0xffff0000
541 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
542 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
543 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
544 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
545 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
547 /* List of features with software fallbacks. */
548 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
551 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
552 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
553 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
554 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
556 /* Interface index. Unique device identifier */
561 struct net_device_stats* (*get_stats)(struct net_device *dev);
562 struct net_device_stats stats;
564 #ifdef CONFIG_WIRELESS_EXT
565 /* List of functions to handle Wireless Extensions (instead of ioctl).
566 * See <net/iw_handler.h> for details. Jean II */
567 const struct iw_handler_def * wireless_handlers;
568 /* Instance data managed by the core of Wireless Extensions. */
569 struct iw_public_data * wireless_data;
571 const struct ethtool_ops *ethtool_ops;
573 /* Hardware header description */
574 const struct header_ops *header_ops;
577 * This marks the end of the "visible" part of the structure. All
578 * fields hereafter are internal to the system, and may change at
579 * will (read: may be cleaned up at will).
583 unsigned int flags; /* interface flags (a la BSD) */
584 unsigned short gflags;
585 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
586 unsigned short padded; /* How much padding added by alloc_netdev() */
588 unsigned char operstate; /* RFC2863 operstate */
589 unsigned char link_mode; /* mapping policy to operstate */
591 unsigned mtu; /* interface MTU value */
592 unsigned short type; /* interface hardware type */
593 unsigned short hard_header_len; /* hardware hdr length */
595 /* extra head- and tailroom the hardware may need, but not in all cases
596 * can this be guaranteed, especially tailroom. Some cases also use
597 * LL_MAX_HEADER instead to allocate the skb.
599 unsigned short needed_headroom;
600 unsigned short needed_tailroom;
602 struct net_device *master; /* Pointer to master device of a group,
603 * which this device is member of.
606 /* Interface address info. */
607 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
608 unsigned char addr_len; /* hardware address length */
609 unsigned short dev_id; /* for shared network cards */
611 spinlock_t addr_list_lock;
612 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
613 int uc_count; /* Number of installed ucasts */
615 struct dev_addr_list *mc_list; /* Multicast mac addresses */
616 int mc_count; /* Number of installed mcasts */
617 unsigned int promiscuity;
618 unsigned int allmulti;
621 /* Protocol specific pointers */
623 void *atalk_ptr; /* AppleTalk link */
624 void *ip_ptr; /* IPv4 specific data */
625 void *dn_ptr; /* DECnet specific data */
626 void *ip6_ptr; /* IPv6 specific data */
627 void *ec_ptr; /* Econet specific data */
628 void *ax25_ptr; /* AX.25 specific data */
629 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
630 assign before registering */
633 * Cache line mostly used on receive path (including eth_type_trans())
635 unsigned long last_rx; /* Time of last Rx */
636 /* Interface address info used in eth_type_trans() */
637 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
638 because most packets are unicast) */
640 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
642 struct netdev_queue rx_queue;
644 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
645 unsigned int num_tx_queues;
646 unsigned long tx_queue_len; /* Max frames per queue allowed */
649 * One part is mostly used on xmit path (device)
651 void *priv; /* pointer to private data */
652 int (*hard_start_xmit) (struct sk_buff *skb,
653 struct net_device *dev);
654 /* These may be needed for future network-power-down code. */
655 unsigned long trans_start; /* Time (in jiffies) of last Tx */
657 int watchdog_timeo; /* used by dev_watchdog() */
658 struct timer_list watchdog_timer;
661 * refcnt is a very hot point, so align it on SMP
663 /* Number of references to this device */
664 atomic_t refcnt ____cacheline_aligned_in_smp;
666 /* delayed register/unregister */
667 struct list_head todo_list;
668 /* device index hash chain */
669 struct hlist_node index_hlist;
671 struct net_device *link_watch_next;
673 /* register/unregister state machine */
674 enum { NETREG_UNINITIALIZED=0,
675 NETREG_REGISTERED, /* completed register_netdevice */
676 NETREG_UNREGISTERING, /* called unregister_netdevice */
677 NETREG_UNREGISTERED, /* completed unregister todo */
678 NETREG_RELEASED, /* called free_netdev */
681 /* Called after device is detached from network. */
682 void (*uninit)(struct net_device *dev);
683 /* Called after last user reference disappears. */
684 void (*destructor)(struct net_device *dev);
686 /* Pointers to interface service routines. */
687 int (*open)(struct net_device *dev);
688 int (*stop)(struct net_device *dev);
689 #define HAVE_NETDEV_POLL
690 #define HAVE_CHANGE_RX_FLAGS
691 void (*change_rx_flags)(struct net_device *dev,
693 #define HAVE_SET_RX_MODE
694 void (*set_rx_mode)(struct net_device *dev);
695 #define HAVE_MULTICAST
696 void (*set_multicast_list)(struct net_device *dev);
697 #define HAVE_SET_MAC_ADDR
698 int (*set_mac_address)(struct net_device *dev,
700 #define HAVE_VALIDATE_ADDR
701 int (*validate_addr)(struct net_device *dev);
702 #define HAVE_PRIVATE_IOCTL
703 int (*do_ioctl)(struct net_device *dev,
704 struct ifreq *ifr, int cmd);
705 #define HAVE_SET_CONFIG
706 int (*set_config)(struct net_device *dev,
708 #define HAVE_CHANGE_MTU
709 int (*change_mtu)(struct net_device *dev, int new_mtu);
711 #define HAVE_TX_TIMEOUT
712 void (*tx_timeout) (struct net_device *dev);
714 void (*vlan_rx_register)(struct net_device *dev,
715 struct vlan_group *grp);
716 void (*vlan_rx_add_vid)(struct net_device *dev,
718 void (*vlan_rx_kill_vid)(struct net_device *dev,
721 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
722 #ifdef CONFIG_NETPOLL
723 struct netpoll_info *npinfo;
725 #ifdef CONFIG_NET_POLL_CONTROLLER
726 void (*poll_controller)(struct net_device *dev);
730 /* Network namespace this network device is inside */
734 /* mid-layer private */
738 struct net_bridge_port *br_port;
740 struct macvlan_port *macvlan_port;
742 struct garp_port *garp_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 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
772 return &dev->_tx[index];
775 static inline void netdev_for_each_tx_queue(struct net_device *dev,
776 void (*f)(struct net_device *,
777 struct netdev_queue *,
783 for (i = 0; i < dev->num_tx_queues; i++)
784 f(dev, &dev->_tx[i], arg);
788 * Net namespace inlines
791 struct net *dev_net(const struct net_device *dev)
801 void dev_net_set(struct net_device *dev, struct net *net)
804 release_net(dev->nd_net);
805 dev->nd_net = hold_net(net);
810 * netdev_priv - access network device private data
811 * @dev: network device
813 * Get network device private data
815 static inline void *netdev_priv(const struct net_device *dev)
820 /* Set the sysfs physical device reference for the network logical device
821 * if set prior to registration will cause a symlink during initialization.
823 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
826 * netif_napi_add - initialize a napi context
827 * @dev: network device
828 * @napi: napi context
829 * @poll: polling function
830 * @weight: default weight
832 * netif_napi_add() must be used to initialize a napi context prior to calling
833 * *any* of the other napi related functions.
835 static inline void netif_napi_add(struct net_device *dev,
836 struct napi_struct *napi,
837 int (*poll)(struct napi_struct *, int),
840 INIT_LIST_HEAD(&napi->poll_list);
842 napi->weight = weight;
843 #ifdef CONFIG_NETPOLL
845 list_add(&napi->dev_list, &dev->napi_list);
846 spin_lock_init(&napi->poll_lock);
847 napi->poll_owner = -1;
849 set_bit(NAPI_STATE_SCHED, &napi->state);
853 * netif_napi_del - remove a napi context
854 * @napi: napi context
856 * netif_napi_del() removes a napi context from the network device napi list
858 static inline void netif_napi_del(struct napi_struct *napi)
860 #ifdef CONFIG_NETPOLL
861 list_del(&napi->dev_list);
866 __be16 type; /* This is really htons(ether_type). */
867 struct net_device *dev; /* NULL is wildcarded here */
868 int (*func) (struct sk_buff *,
870 struct packet_type *,
871 struct net_device *);
872 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
874 int (*gso_send_check)(struct sk_buff *skb);
875 void *af_packet_priv;
876 struct list_head list;
879 #include <linux/interrupt.h>
880 #include <linux/notifier.h>
882 extern rwlock_t dev_base_lock; /* Device list lock */
885 #define for_each_netdev(net, d) \
886 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
887 #define for_each_netdev_safe(net, d, n) \
888 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
889 #define for_each_netdev_continue(net, d) \
890 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
891 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
893 static inline struct net_device *next_net_device(struct net_device *dev)
895 struct list_head *lh;
899 lh = dev->dev_list.next;
900 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
903 static inline struct net_device *first_net_device(struct net *net)
905 return list_empty(&net->dev_base_head) ? NULL :
906 net_device_entry(net->dev_base_head.next);
909 extern int netdev_boot_setup_check(struct net_device *dev);
910 extern unsigned long netdev_boot_base(const char *prefix, int unit);
911 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
912 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
913 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
914 extern void dev_add_pack(struct packet_type *pt);
915 extern void dev_remove_pack(struct packet_type *pt);
916 extern void __dev_remove_pack(struct packet_type *pt);
918 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
919 unsigned short mask);
920 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
921 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
922 extern int dev_alloc_name(struct net_device *dev, const char *name);
923 extern int dev_open(struct net_device *dev);
924 extern int dev_close(struct net_device *dev);
925 extern void dev_disable_lro(struct net_device *dev);
926 extern int dev_queue_xmit(struct sk_buff *skb);
927 extern int register_netdevice(struct net_device *dev);
928 extern void unregister_netdevice(struct net_device *dev);
929 extern void free_netdev(struct net_device *dev);
930 extern void synchronize_net(void);
931 extern int register_netdevice_notifier(struct notifier_block *nb);
932 extern int unregister_netdevice_notifier(struct notifier_block *nb);
933 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
934 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
935 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
936 extern int dev_restart(struct net_device *dev);
937 #ifdef CONFIG_NETPOLL_TRAP
938 extern int netpoll_trap(void);
941 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
943 const void *daddr, const void *saddr,
946 if (!dev->header_ops || !dev->header_ops->create)
949 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
952 static inline int dev_parse_header(const struct sk_buff *skb,
953 unsigned char *haddr)
955 const struct net_device *dev = skb->dev;
957 if (!dev->header_ops || !dev->header_ops->parse)
959 return dev->header_ops->parse(skb, haddr);
962 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
963 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
964 static inline int unregister_gifconf(unsigned int family)
966 return register_gifconf(family, NULL);
970 * Incoming packets are placed on per-cpu queues so that
971 * no locking is needed.
975 struct netdev_queue *output_queue;
976 struct sk_buff_head input_pkt_queue;
977 struct list_head poll_list;
978 struct sk_buff *completion_queue;
980 struct napi_struct backlog;
981 #ifdef CONFIG_NET_DMA
982 struct dma_chan *net_dma;
986 DECLARE_PER_CPU(struct softnet_data,softnet_data);
988 #define HAVE_NETIF_QUEUE
990 extern void __netif_schedule(struct netdev_queue *txq);
992 static inline void netif_schedule_queue(struct netdev_queue *txq)
994 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
995 __netif_schedule(txq);
998 static inline void netif_schedule(struct net_device *dev)
1000 netif_schedule_queue(netdev_get_tx_queue(dev, 0));
1004 * netif_start_queue - allow transmit
1005 * @dev: network device
1007 * Allow upper layers to call the device hard_start_xmit routine.
1009 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1011 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1014 static inline void netif_start_queue(struct net_device *dev)
1016 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1020 * netif_wake_queue - restart transmit
1021 * @dev: network device
1023 * Allow upper layers to call the device hard_start_xmit routine.
1024 * Used for flow control when transmit resources are available.
1026 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1028 #ifdef CONFIG_NETPOLL_TRAP
1029 if (netpoll_trap()) {
1030 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1034 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1035 __netif_schedule(dev_queue);
1038 static inline void netif_wake_queue(struct net_device *dev)
1040 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1044 * netif_stop_queue - stop transmitted packets
1045 * @dev: network device
1047 * Stop upper layers calling the device hard_start_xmit routine.
1048 * Used for flow control when transmit resources are unavailable.
1050 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1052 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1055 static inline void netif_stop_queue(struct net_device *dev)
1057 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1061 * netif_queue_stopped - test if transmit queue is flowblocked
1062 * @dev: network device
1064 * Test if transmit queue on device is currently unable to send.
1066 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1068 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1071 static inline int netif_queue_stopped(const struct net_device *dev)
1073 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1077 * netif_running - test if up
1078 * @dev: network device
1080 * Test if the device has been brought up.
1082 static inline int netif_running(const struct net_device *dev)
1084 return test_bit(__LINK_STATE_START, &dev->state);
1088 * Routines to manage the subqueues on a device. We only need start
1089 * stop, and a check if it's stopped. All other device management is
1090 * done at the overall netdevice level.
1091 * Also test the device if we're multiqueue.
1095 * netif_start_subqueue - allow sending packets on subqueue
1096 * @dev: network device
1097 * @queue_index: sub queue index
1099 * Start individual transmit queue of a device with multiple transmit queues.
1101 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1103 clear_bit(__QUEUE_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1107 * netif_stop_subqueue - stop sending packets on subqueue
1108 * @dev: network device
1109 * @queue_index: sub queue index
1111 * Stop individual transmit queue of a device with multiple transmit queues.
1113 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1115 #ifdef CONFIG_NETPOLL_TRAP
1119 set_bit(__QUEUE_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
1123 * netif_subqueue_stopped - test status of subqueue
1124 * @dev: network device
1125 * @queue_index: sub queue index
1127 * Check individual transmit queue of a device with multiple transmit queues.
1129 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1132 return test_bit(__QUEUE_STATE_XOFF,
1133 &dev->egress_subqueue[queue_index].state);
1136 static inline int netif_subqueue_stopped(const struct net_device *dev,
1137 struct sk_buff *skb)
1139 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1143 * netif_wake_subqueue - allow sending packets on subqueue
1144 * @dev: network device
1145 * @queue_index: sub queue index
1147 * Resume individual transmit queue of a device with multiple transmit queues.
1149 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1151 #ifdef CONFIG_NETPOLL_TRAP
1155 if (test_and_clear_bit(__QUEUE_STATE_XOFF,
1156 &dev->egress_subqueue[queue_index].state))
1157 __netif_schedule(netdev_get_tx_queue(dev, 0));
1161 * netif_is_multiqueue - test if device has multiple transmit queues
1162 * @dev: network device
1164 * Check if device has multiple transmit queues
1166 static inline int netif_is_multiqueue(const struct net_device *dev)
1168 return (dev->num_tx_queues > 1);
1171 /* Use this variant when it is known for sure that it
1172 * is executing from hardware interrupt context or with hardware interrupts
1175 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1177 /* Use this variant in places where it could be invoked
1178 * from either hardware interrupt or other context, with hardware interrupts
1179 * either disabled or enabled.
1181 extern void dev_kfree_skb_any(struct sk_buff *skb);
1183 #define HAVE_NETIF_RX 1
1184 extern int netif_rx(struct sk_buff *skb);
1185 extern int netif_rx_ni(struct sk_buff *skb);
1186 #define HAVE_NETIF_RECEIVE_SKB 1
1187 extern int netif_receive_skb(struct sk_buff *skb);
1188 extern void netif_nit_deliver(struct sk_buff *skb);
1189 extern int dev_valid_name(const char *name);
1190 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1191 extern int dev_ethtool(struct net *net, struct ifreq *);
1192 extern unsigned dev_get_flags(const struct net_device *);
1193 extern int dev_change_flags(struct net_device *, unsigned);
1194 extern int dev_change_name(struct net_device *, char *);
1195 extern int dev_change_net_namespace(struct net_device *,
1196 struct net *, const char *);
1197 extern int dev_set_mtu(struct net_device *, int);
1198 extern int dev_set_mac_address(struct net_device *,
1200 extern int dev_hard_start_xmit(struct sk_buff *skb,
1201 struct net_device *dev);
1203 extern int netdev_budget;
1205 /* Called by rtnetlink.c:rtnl_unlock() */
1206 extern void netdev_run_todo(void);
1209 * dev_put - release reference to device
1210 * @dev: network device
1212 * Release reference to device to allow it to be freed.
1214 static inline void dev_put(struct net_device *dev)
1216 atomic_dec(&dev->refcnt);
1220 * dev_hold - get reference to device
1221 * @dev: network device
1223 * Hold reference to device to keep it from being freed.
1225 static inline void dev_hold(struct net_device *dev)
1227 atomic_inc(&dev->refcnt);
1230 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1231 * and _off may be called from IRQ context, but it is caller
1232 * who is responsible for serialization of these calls.
1234 * The name carrier is inappropriate, these functions should really be
1235 * called netif_lowerlayer_*() because they represent the state of any
1236 * kind of lower layer not just hardware media.
1239 extern void linkwatch_fire_event(struct net_device *dev);
1242 * netif_carrier_ok - test if carrier present
1243 * @dev: network device
1245 * Check if carrier is present on device
1247 static inline int netif_carrier_ok(const struct net_device *dev)
1249 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1252 extern void __netdev_watchdog_up(struct net_device *dev);
1254 extern void netif_carrier_on(struct net_device *dev);
1256 extern void netif_carrier_off(struct net_device *dev);
1259 * netif_dormant_on - mark device as dormant.
1260 * @dev: network device
1262 * Mark device as dormant (as per RFC2863).
1264 * The dormant state indicates that the relevant interface is not
1265 * actually in a condition to pass packets (i.e., it is not 'up') but is
1266 * in a "pending" state, waiting for some external event. For "on-
1267 * demand" interfaces, this new state identifies the situation where the
1268 * interface is waiting for events to place it in the up state.
1271 static inline void netif_dormant_on(struct net_device *dev)
1273 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1274 linkwatch_fire_event(dev);
1278 * netif_dormant_off - set device as not dormant.
1279 * @dev: network device
1281 * Device is not in dormant state.
1283 static inline void netif_dormant_off(struct net_device *dev)
1285 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1286 linkwatch_fire_event(dev);
1290 * netif_dormant - test if carrier present
1291 * @dev: network device
1293 * Check if carrier is present on device
1295 static inline int netif_dormant(const struct net_device *dev)
1297 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1302 * netif_oper_up - test if device is operational
1303 * @dev: network device
1305 * Check if carrier is operational
1307 static inline int netif_oper_up(const struct net_device *dev) {
1308 return (dev->operstate == IF_OPER_UP ||
1309 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1313 * netif_device_present - is device available or removed
1314 * @dev: network device
1316 * Check if device has not been removed from system.
1318 static inline int netif_device_present(struct net_device *dev)
1320 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1323 extern void netif_device_detach(struct net_device *dev);
1325 extern void netif_device_attach(struct net_device *dev);
1328 * Network interface message level settings
1330 #define HAVE_NETIF_MSG 1
1333 NETIF_MSG_DRV = 0x0001,
1334 NETIF_MSG_PROBE = 0x0002,
1335 NETIF_MSG_LINK = 0x0004,
1336 NETIF_MSG_TIMER = 0x0008,
1337 NETIF_MSG_IFDOWN = 0x0010,
1338 NETIF_MSG_IFUP = 0x0020,
1339 NETIF_MSG_RX_ERR = 0x0040,
1340 NETIF_MSG_TX_ERR = 0x0080,
1341 NETIF_MSG_TX_QUEUED = 0x0100,
1342 NETIF_MSG_INTR = 0x0200,
1343 NETIF_MSG_TX_DONE = 0x0400,
1344 NETIF_MSG_RX_STATUS = 0x0800,
1345 NETIF_MSG_PKTDATA = 0x1000,
1346 NETIF_MSG_HW = 0x2000,
1347 NETIF_MSG_WOL = 0x4000,
1350 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1351 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1352 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1353 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1354 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1355 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1356 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1357 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1358 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1359 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1360 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1361 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1362 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1363 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1364 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1366 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1369 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1370 return default_msg_enable_bits;
1371 if (debug_value == 0) /* no output */
1373 /* set low N bits */
1374 return (1 << debug_value) - 1;
1377 /* Test if receive needs to be scheduled but only if up */
1378 static inline int netif_rx_schedule_prep(struct net_device *dev,
1379 struct napi_struct *napi)
1381 return napi_schedule_prep(napi);
1384 /* Add interface to tail of rx poll list. This assumes that _prep has
1385 * already been called and returned 1.
1387 static inline void __netif_rx_schedule(struct net_device *dev,
1388 struct napi_struct *napi)
1390 __napi_schedule(napi);
1393 /* Try to reschedule poll. Called by irq handler. */
1395 static inline void netif_rx_schedule(struct net_device *dev,
1396 struct napi_struct *napi)
1398 if (netif_rx_schedule_prep(dev, napi))
1399 __netif_rx_schedule(dev, napi);
1402 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1403 static inline int netif_rx_reschedule(struct net_device *dev,
1404 struct napi_struct *napi)
1406 if (napi_schedule_prep(napi)) {
1407 __netif_rx_schedule(dev, napi);
1413 /* same as netif_rx_complete, except that local_irq_save(flags)
1414 * has already been issued
1416 static inline void __netif_rx_complete(struct net_device *dev,
1417 struct napi_struct *napi)
1419 __napi_complete(napi);
1422 /* Remove interface from poll list: it must be in the poll list
1423 * on current cpu. This primitive is called by dev->poll(), when
1424 * it completes the work. The device cannot be out of poll list at this
1425 * moment, it is BUG().
1427 static inline void netif_rx_complete(struct net_device *dev,
1428 struct napi_struct *napi)
1430 unsigned long flags;
1432 local_irq_save(flags);
1433 __netif_rx_complete(dev, napi);
1434 local_irq_restore(flags);
1438 * netif_tx_lock - grab network device transmit lock
1439 * @dev: network device
1440 * @cpu: cpu number of lock owner
1442 * Get network device transmit lock
1444 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1446 spin_lock(&txq->_xmit_lock);
1447 txq->xmit_lock_owner = cpu;
1450 static inline void netif_tx_lock(struct net_device *dev)
1452 int cpu = smp_processor_id();
1455 for (i = 0; i < dev->num_tx_queues; i++) {
1456 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1457 __netif_tx_lock(txq, cpu);
1461 static inline void netif_tx_lock_bh(struct net_device *dev)
1467 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1469 int ok = spin_trylock(&txq->_xmit_lock);
1471 txq->xmit_lock_owner = smp_processor_id();
1475 static inline int netif_tx_trylock(struct net_device *dev)
1477 return __netif_tx_trylock(netdev_get_tx_queue(dev, 0));
1480 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1482 txq->xmit_lock_owner = -1;
1483 spin_unlock(&txq->_xmit_lock);
1486 static inline void netif_tx_unlock(struct net_device *dev)
1490 for (i = 0; i < dev->num_tx_queues; i++) {
1491 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1492 __netif_tx_unlock(txq);
1497 static inline void netif_tx_unlock_bh(struct net_device *dev)
1499 netif_tx_unlock(dev);
1503 #define HARD_TX_LOCK(dev, txq, cpu) { \
1504 if ((dev->features & NETIF_F_LLTX) == 0) { \
1505 __netif_tx_lock(txq, cpu); \
1509 #define HARD_TX_UNLOCK(dev, txq) { \
1510 if ((dev->features & NETIF_F_LLTX) == 0) { \
1511 __netif_tx_unlock(txq); \
1515 static inline void netif_tx_disable(struct net_device *dev)
1517 netif_tx_lock_bh(dev);
1518 netif_stop_queue(dev);
1519 netif_tx_unlock_bh(dev);
1522 static inline void netif_addr_lock(struct net_device *dev)
1524 spin_lock(&dev->addr_list_lock);
1527 static inline void netif_addr_lock_bh(struct net_device *dev)
1529 spin_lock_bh(&dev->addr_list_lock);
1532 static inline void netif_addr_unlock(struct net_device *dev)
1534 spin_unlock(&dev->addr_list_lock);
1537 static inline void netif_addr_unlock_bh(struct net_device *dev)
1539 spin_unlock_bh(&dev->addr_list_lock);
1542 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1544 extern void ether_setup(struct net_device *dev);
1546 /* Support for loadable net-drivers */
1547 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1548 void (*setup)(struct net_device *),
1549 unsigned int queue_count);
1550 #define alloc_netdev(sizeof_priv, name, setup) \
1551 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1552 extern int register_netdev(struct net_device *dev);
1553 extern void unregister_netdev(struct net_device *dev);
1554 /* Functions used for secondary unicast and multicast support */
1555 extern void dev_set_rx_mode(struct net_device *dev);
1556 extern void __dev_set_rx_mode(struct net_device *dev);
1557 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1558 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1559 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1560 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1561 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1562 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1563 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1564 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1565 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1566 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1567 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1568 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1569 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1570 extern int dev_set_allmulti(struct net_device *dev, int inc);
1571 extern void netdev_state_change(struct net_device *dev);
1572 extern void netdev_bonding_change(struct net_device *dev);
1573 extern void netdev_features_change(struct net_device *dev);
1574 /* Load a device via the kmod */
1575 extern void dev_load(struct net *net, const char *name);
1576 extern void dev_mcast_init(void);
1577 extern int netdev_max_backlog;
1578 extern int weight_p;
1579 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1580 extern int skb_checksum_help(struct sk_buff *skb);
1581 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1583 extern void netdev_rx_csum_fault(struct net_device *dev);
1585 static inline void netdev_rx_csum_fault(struct net_device *dev)
1589 /* rx skb timestamps */
1590 extern void net_enable_timestamp(void);
1591 extern void net_disable_timestamp(void);
1593 #ifdef CONFIG_PROC_FS
1594 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1595 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1596 extern void dev_seq_stop(struct seq_file *seq, void *v);
1599 extern int netdev_class_create_file(struct class_attribute *class_attr);
1600 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1602 extern void linkwatch_run_queue(void);
1604 extern int netdev_compute_features(unsigned long all, unsigned long one);
1606 static inline int net_gso_ok(int features, int gso_type)
1608 int feature = gso_type << NETIF_F_GSO_SHIFT;
1609 return (features & feature) == feature;
1612 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1614 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1617 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1619 return skb_is_gso(skb) &&
1620 (!skb_gso_ok(skb, dev->features) ||
1621 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1624 static inline void netif_set_gso_max_size(struct net_device *dev,
1627 dev->gso_max_size = size;
1630 /* On bonding slaves other than the currently active slave, suppress
1631 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1632 * ARP on active-backup slaves with arp_validate enabled.
1634 static inline int skb_bond_should_drop(struct sk_buff *skb)
1636 struct net_device *dev = skb->dev;
1637 struct net_device *master = dev->master;
1640 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1641 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1642 skb->protocol == __constant_htons(ETH_P_ARP))
1645 if (master->priv_flags & IFF_MASTER_ALB) {
1646 if (skb->pkt_type != PACKET_BROADCAST &&
1647 skb->pkt_type != PACKET_MULTICAST)
1650 if (master->priv_flags & IFF_MASTER_8023AD &&
1651 skb->protocol == __constant_htons(ETH_P_SLOW))
1659 #endif /* __KERNEL__ */
1661 #endif /* _LINUX_DEV_H */