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@lxorguk.ukuu.org.uk>
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>
36 #include <asm/atomic.h>
37 #include <asm/cache.h>
38 #include <asm/byteorder.h>
40 #include <linux/device.h>
41 #include <linux/percpu.h>
42 #include <linux/dmaengine.h>
43 #include <linux/workqueue.h>
45 #include <linux/ethtool.h>
46 #include <net/net_namespace.h>
49 #include <net/dcbnl.h>
56 /* source back-compat hooks */
57 #define SET_ETHTOOL_OPS(netdev,ops) \
58 ( (netdev)->ethtool_ops = (ops) )
60 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
61 functions are available. */
62 #define HAVE_FREE_NETDEV /* free_netdev() */
63 #define HAVE_NETDEV_PRIV /* netdev_priv() */
65 #define NET_XMIT_SUCCESS 0
66 #define NET_XMIT_DROP 1 /* skb dropped */
67 #define NET_XMIT_CN 2 /* congestion notification */
68 #define NET_XMIT_POLICED 3 /* skb is shot by police */
69 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
74 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
75 #define NET_RX_CN_MOD 3 /* Storm on its way! */
76 #define NET_RX_CN_HIGH 4 /* The storm is here */
77 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
79 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
80 * indicates that the device will soon be dropping packets, or already drops
81 * some packets of the same priority; prompting us to send less aggressively. */
82 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
83 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
87 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
89 /* Driver transmit return codes */
90 #define NETDEV_TX_OK 0 /* driver took care of packet */
91 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
92 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
97 * Compute the worst case header length according to the protocols
101 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
102 # if defined(CONFIG_MAC80211_MESH)
103 # define LL_MAX_HEADER 128
105 # define LL_MAX_HEADER 96
107 #elif defined(CONFIG_TR)
108 # define LL_MAX_HEADER 48
110 # define LL_MAX_HEADER 32
113 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
114 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
115 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
116 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
117 #define MAX_HEADER LL_MAX_HEADER
119 #define MAX_HEADER (LL_MAX_HEADER + 48)
122 #endif /* __KERNEL__ */
125 * Network device statistics. Akin to the 2.0 ether stats but
126 * with byte counters.
129 struct net_device_stats
131 unsigned long rx_packets; /* total packets received */
132 unsigned long tx_packets; /* total packets transmitted */
133 unsigned long rx_bytes; /* total bytes received */
134 unsigned long tx_bytes; /* total bytes transmitted */
135 unsigned long rx_errors; /* bad packets received */
136 unsigned long tx_errors; /* packet transmit problems */
137 unsigned long rx_dropped; /* no space in linux buffers */
138 unsigned long tx_dropped; /* no space available in linux */
139 unsigned long multicast; /* multicast packets received */
140 unsigned long collisions;
142 /* detailed rx_errors: */
143 unsigned long rx_length_errors;
144 unsigned long rx_over_errors; /* receiver ring buff overflow */
145 unsigned long rx_crc_errors; /* recved pkt with crc error */
146 unsigned long rx_frame_errors; /* recv'd frame alignment error */
147 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
148 unsigned long rx_missed_errors; /* receiver missed packet */
150 /* detailed tx_errors */
151 unsigned long tx_aborted_errors;
152 unsigned long tx_carrier_errors;
153 unsigned long tx_fifo_errors;
154 unsigned long tx_heartbeat_errors;
155 unsigned long tx_window_errors;
158 unsigned long rx_compressed;
159 unsigned long tx_compressed;
163 /* Media selection options. */
176 #include <linux/cache.h>
177 #include <linux/skbuff.h>
183 struct netif_rx_stats
187 unsigned time_squeeze;
188 unsigned cpu_collision;
191 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
195 struct dev_addr_list *next;
196 u8 da_addr[MAX_ADDR_LEN];
204 * We tag multicasts with these structures.
207 #define dev_mc_list dev_addr_list
208 #define dmi_addr da_addr
209 #define dmi_addrlen da_addrlen
210 #define dmi_users da_users
211 #define dmi_gusers da_gusers
215 struct hh_cache *hh_next; /* Next entry */
216 atomic_t hh_refcnt; /* number of users */
218 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
220 * They are mostly read, but hh_refcnt may be changed quite frequently,
221 * incurring cache line ping pongs.
223 __be16 hh_type ____cacheline_aligned_in_smp;
224 /* protocol identifier, f.e ETH_P_IP
225 * NOTE: For VLANs, this will be the
226 * encapuslated type. --BLG
228 u16 hh_len; /* length of header */
229 int (*hh_output)(struct sk_buff *skb);
232 /* cached hardware header; allow for machine alignment needs. */
233 #define HH_DATA_MOD 16
234 #define HH_DATA_OFF(__len) \
235 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
236 #define HH_DATA_ALIGN(__len) \
237 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
238 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
241 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
243 * dev->hard_header_len ? (dev->hard_header_len +
244 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
246 * We could use other alignment values, but we must maintain the
247 * relationship HH alignment <= LL alignment.
249 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
252 #define LL_RESERVED_SPACE(dev) \
253 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
254 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
255 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
256 #define LL_ALLOCATED_SPACE(dev) \
257 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
260 int (*create) (struct sk_buff *skb, struct net_device *dev,
261 unsigned short type, const void *daddr,
262 const void *saddr, unsigned len);
263 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
264 int (*rebuild)(struct sk_buff *skb);
265 #define HAVE_HEADER_CACHE
266 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
267 void (*cache_update)(struct hh_cache *hh,
268 const struct net_device *dev,
269 const unsigned char *haddr);
272 /* These flag bits are private to the generic network queueing
273 * layer, they may not be explicitly referenced by any other
280 __LINK_STATE_PRESENT,
281 __LINK_STATE_NOCARRIER,
282 __LINK_STATE_LINKWATCH_PENDING,
283 __LINK_STATE_DORMANT,
288 * This structure holds at boot time configured netdevice settings. They
289 * are then used in the device probing.
291 struct netdev_boot_setup {
295 #define NETDEV_BOOT_SETUP_MAX 8
297 extern int __init netdev_boot_setup(char *str);
300 * Structure for NAPI scheduling similar to tasklet but with weighting
303 /* The poll_list must only be managed by the entity which
304 * changes the state of the NAPI_STATE_SCHED bit. This means
305 * whoever atomically sets that bit can add this napi_struct
306 * to the per-cpu poll_list, and whoever clears that bit
307 * can remove from the list right before clearing the bit.
309 struct list_head poll_list;
313 int (*poll)(struct napi_struct *, int);
314 #ifdef CONFIG_NETPOLL
315 spinlock_t poll_lock;
319 unsigned int gro_count;
321 struct net_device *dev;
322 struct list_head dev_list;
323 struct sk_buff *gro_list;
329 NAPI_STATE_SCHED, /* Poll is scheduled */
330 NAPI_STATE_DISABLE, /* Disable pending */
331 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
342 extern void __napi_schedule(struct napi_struct *n);
344 static inline int napi_disable_pending(struct napi_struct *n)
346 return test_bit(NAPI_STATE_DISABLE, &n->state);
350 * napi_schedule_prep - check if napi can be scheduled
353 * Test if NAPI routine is already running, and if not mark
354 * it as running. This is used as a condition variable
355 * insure only one NAPI poll instance runs. We also make
356 * sure there is no pending NAPI disable.
358 static inline int napi_schedule_prep(struct napi_struct *n)
360 return !napi_disable_pending(n) &&
361 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
365 * napi_schedule - schedule NAPI poll
368 * Schedule NAPI poll routine to be called if it is not already
371 static inline void napi_schedule(struct napi_struct *n)
373 if (napi_schedule_prep(n))
377 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
378 static inline int napi_reschedule(struct napi_struct *napi)
380 if (napi_schedule_prep(napi)) {
381 __napi_schedule(napi);
388 * napi_complete - NAPI processing complete
391 * Mark NAPI processing as complete.
393 extern void __napi_complete(struct napi_struct *n);
394 extern void napi_complete(struct napi_struct *n);
397 * napi_disable - prevent NAPI from scheduling
400 * Stop NAPI from being scheduled on this context.
401 * Waits till any outstanding processing completes.
403 static inline void napi_disable(struct napi_struct *n)
405 set_bit(NAPI_STATE_DISABLE, &n->state);
406 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
408 clear_bit(NAPI_STATE_DISABLE, &n->state);
412 * napi_enable - enable NAPI scheduling
415 * Resume NAPI from being scheduled on this context.
416 * Must be paired with napi_disable.
418 static inline void napi_enable(struct napi_struct *n)
420 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
421 smp_mb__before_clear_bit();
422 clear_bit(NAPI_STATE_SCHED, &n->state);
427 * napi_synchronize - wait until NAPI is not running
430 * Wait until NAPI is done being scheduled on this context.
431 * Waits till any outstanding processing completes but
432 * does not disable future activations.
434 static inline void napi_synchronize(const struct napi_struct *n)
436 while (test_bit(NAPI_STATE_SCHED, &n->state))
440 # define napi_synchronize(n) barrier()
443 enum netdev_queue_state_t
446 __QUEUE_STATE_FROZEN,
449 struct netdev_queue {
453 struct net_device *dev;
456 struct Qdisc *qdisc_sleeping;
460 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
462 } ____cacheline_aligned_in_smp;
466 * This structure defines the management hooks for network devices.
467 * The following hooks can be defined; unless noted otherwise, they are
468 * optional and can be filled with a null pointer.
470 * int (*ndo_init)(struct net_device *dev);
471 * This function is called once when network device is registered.
472 * The network device can use this to any late stage initializaton
473 * or semantic validattion. It can fail with an error code which will
474 * be propogated back to register_netdev
476 * void (*ndo_uninit)(struct net_device *dev);
477 * This function is called when device is unregistered or when registration
478 * fails. It is not called if init fails.
480 * int (*ndo_open)(struct net_device *dev);
481 * This function is called when network device transistions to the up
484 * int (*ndo_stop)(struct net_device *dev);
485 * This function is called when network device transistions to the down
488 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
489 * Called when a packet needs to be transmitted.
490 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
491 * Required can not be NULL.
493 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
494 * Called to decide which queue to when device supports multiple
497 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
498 * This function is called to allow device receiver to make
499 * changes to configuration when multicast or promiscious is enabled.
501 * void (*ndo_set_rx_mode)(struct net_device *dev);
502 * This function is called device changes address list filtering.
504 * void (*ndo_set_multicast_list)(struct net_device *dev);
505 * This function is called when the multicast address list changes.
507 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
508 * This function is called when the Media Access Control address
509 * needs to be changed. If not this interface is not defined, the
510 * mac address can not be changed.
512 * int (*ndo_validate_addr)(struct net_device *dev);
513 * Test if Media Access Control address is valid for the device.
515 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
516 * Called when a user request an ioctl which can't be handled by
517 * the generic interface code. If not defined ioctl's return
518 * not supported error code.
520 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
521 * Used to set network devices bus interface parameters. This interface
522 * is retained for legacy reason, new devices should use the bus
523 * interface (PCI) for low level management.
525 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
526 * Called when a user wants to change the Maximum Transfer Unit
527 * of a device. If not defined, any request to change MTU will
528 * will return an error.
530 * void (*ndo_tx_timeout)(struct net_device *dev);
531 * Callback uses when the transmitter has not made any progress
532 * for dev->watchdog ticks.
534 * struct net_device_stats* (*get_stats)(struct net_device *dev);
535 * Called when a user wants to get the network device usage
536 * statistics. If not defined, the counters in dev->stats will
539 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
540 * If device support VLAN receive accleration
541 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
542 * when vlan groups for the device changes. Note: grp is NULL
543 * if no vlan's groups are being used.
545 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
546 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
547 * this function is called when a VLAN id is registered.
549 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
550 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
551 * this function is called when a VLAN id is unregistered.
553 * void (*ndo_poll_controller)(struct net_device *dev);
555 #define HAVE_NET_DEVICE_OPS
556 struct net_device_ops {
557 int (*ndo_init)(struct net_device *dev);
558 void (*ndo_uninit)(struct net_device *dev);
559 int (*ndo_open)(struct net_device *dev);
560 int (*ndo_stop)(struct net_device *dev);
561 int (*ndo_start_xmit) (struct sk_buff *skb,
562 struct net_device *dev);
563 u16 (*ndo_select_queue)(struct net_device *dev,
564 struct sk_buff *skb);
565 #define HAVE_CHANGE_RX_FLAGS
566 void (*ndo_change_rx_flags)(struct net_device *dev,
568 #define HAVE_SET_RX_MODE
569 void (*ndo_set_rx_mode)(struct net_device *dev);
570 #define HAVE_MULTICAST
571 void (*ndo_set_multicast_list)(struct net_device *dev);
572 #define HAVE_SET_MAC_ADDR
573 int (*ndo_set_mac_address)(struct net_device *dev,
575 #define HAVE_VALIDATE_ADDR
576 int (*ndo_validate_addr)(struct net_device *dev);
577 #define HAVE_PRIVATE_IOCTL
578 int (*ndo_do_ioctl)(struct net_device *dev,
579 struct ifreq *ifr, int cmd);
580 #define HAVE_SET_CONFIG
581 int (*ndo_set_config)(struct net_device *dev,
583 #define HAVE_CHANGE_MTU
584 int (*ndo_change_mtu)(struct net_device *dev,
586 int (*ndo_neigh_setup)(struct net_device *dev,
587 struct neigh_parms *);
588 #define HAVE_TX_TIMEOUT
589 void (*ndo_tx_timeout) (struct net_device *dev);
591 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
593 void (*ndo_vlan_rx_register)(struct net_device *dev,
594 struct vlan_group *grp);
595 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
597 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
599 #ifdef CONFIG_NET_POLL_CONTROLLER
600 #define HAVE_NETDEV_POLL
601 void (*ndo_poll_controller)(struct net_device *dev);
603 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
604 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
606 struct scatterlist *sgl,
608 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
614 * The DEVICE structure.
615 * Actually, this whole structure is a big mistake. It mixes I/O
616 * data with strictly "high-level" data, and it has to know about
617 * almost every data structure used in the INET module.
619 * FIXME: cleanup struct net_device such that network protocol info
627 * This is the first field of the "visible" part of this structure
628 * (i.e. as seen by users in the "Space.c" file). It is the name
632 /* device name hash chain */
633 struct hlist_node name_hlist;
638 * I/O specific fields
639 * FIXME: Merge these and struct ifmap into one
641 unsigned long mem_end; /* shared mem end */
642 unsigned long mem_start; /* shared mem start */
643 unsigned long base_addr; /* device I/O address */
644 unsigned int irq; /* device IRQ number */
647 * Some hardware also needs these fields, but they are not
648 * part of the usual set specified in Space.c.
651 unsigned char if_port; /* Selectable AUI, TP,..*/
652 unsigned char dma; /* DMA channel */
656 struct list_head dev_list;
657 struct list_head napi_list;
659 /* Net device features */
660 unsigned long features;
661 #define NETIF_F_SG 1 /* Scatter/gather IO. */
662 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
663 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
664 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
665 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
666 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
667 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
668 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
669 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
670 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
671 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
672 #define NETIF_F_GSO 2048 /* Enable software GSO. */
673 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
674 /* do not use LLTX in new drivers */
675 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
676 #define NETIF_F_GRO 16384 /* Generic receive offload */
677 #define NETIF_F_LRO 32768 /* large receive offload */
679 /* the GSO_MASK reserves bits 16 through 23 */
680 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
681 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
683 /* Segmentation offload features */
684 #define NETIF_F_GSO_SHIFT 16
685 #define NETIF_F_GSO_MASK 0x00ff0000
686 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
687 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
688 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
689 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
690 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
691 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
693 /* List of features with software fallbacks. */
694 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
697 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
698 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
699 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
700 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
703 * If one device supports one of these features, then enable them
704 * for all in netdev_increment_features.
706 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
707 NETIF_F_SG | NETIF_F_HIGHDMA | \
710 /* Interface index. Unique device identifier */
714 struct net_device_stats stats;
716 #ifdef CONFIG_WIRELESS_EXT
717 /* List of functions to handle Wireless Extensions (instead of ioctl).
718 * See <net/iw_handler.h> for details. Jean II */
719 const struct iw_handler_def * wireless_handlers;
720 /* Instance data managed by the core of Wireless Extensions. */
721 struct iw_public_data * wireless_data;
723 /* Management operations */
724 const struct net_device_ops *netdev_ops;
725 const struct ethtool_ops *ethtool_ops;
727 /* Hardware header description */
728 const struct header_ops *header_ops;
730 unsigned int flags; /* interface flags (a la BSD) */
731 unsigned short gflags;
732 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
733 unsigned short padded; /* How much padding added by alloc_netdev() */
735 unsigned char operstate; /* RFC2863 operstate */
736 unsigned char link_mode; /* mapping policy to operstate */
738 unsigned mtu; /* interface MTU value */
739 unsigned short type; /* interface hardware type */
740 unsigned short hard_header_len; /* hardware hdr length */
742 /* extra head- and tailroom the hardware may need, but not in all cases
743 * can this be guaranteed, especially tailroom. Some cases also use
744 * LL_MAX_HEADER instead to allocate the skb.
746 unsigned short needed_headroom;
747 unsigned short needed_tailroom;
749 struct net_device *master; /* Pointer to master device of a group,
750 * which this device is member of.
753 /* Interface address info. */
754 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
755 unsigned char addr_len; /* hardware address length */
756 unsigned short dev_id; /* for shared network cards */
758 spinlock_t addr_list_lock;
759 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
760 int uc_count; /* Number of installed ucasts */
762 struct dev_addr_list *mc_list; /* Multicast mac addresses */
763 int mc_count; /* Number of installed mcasts */
764 unsigned int promiscuity;
765 unsigned int allmulti;
768 /* Protocol specific pointers */
770 #ifdef CONFIG_NET_DSA
771 void *dsa_ptr; /* dsa specific data */
773 void *atalk_ptr; /* AppleTalk link */
774 void *ip_ptr; /* IPv4 specific data */
775 void *dn_ptr; /* DECnet specific data */
776 void *ip6_ptr; /* IPv6 specific data */
777 void *ec_ptr; /* Econet specific data */
778 void *ax25_ptr; /* AX.25 specific data */
779 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
780 assign before registering */
783 * Cache line mostly used on receive path (including eth_type_trans())
785 unsigned long last_rx; /* Time of last Rx */
786 /* Interface address info used in eth_type_trans() */
787 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
788 because most packets are unicast) */
790 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
792 struct netdev_queue rx_queue;
794 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
796 /* Number of TX queues allocated at alloc_netdev_mq() time */
797 unsigned int num_tx_queues;
799 /* Number of TX queues currently active in device */
800 unsigned int real_num_tx_queues;
802 unsigned long tx_queue_len; /* Max frames per queue allowed */
803 spinlock_t tx_global_lock;
805 * One part is mostly used on xmit path (device)
807 /* These may be needed for future network-power-down code. */
808 unsigned long trans_start; /* Time (in jiffies) of last Tx */
810 int watchdog_timeo; /* used by dev_watchdog() */
811 struct timer_list watchdog_timer;
813 /* Number of references to this device */
814 atomic_t refcnt ____cacheline_aligned_in_smp;
816 /* delayed register/unregister */
817 struct list_head todo_list;
818 /* device index hash chain */
819 struct hlist_node index_hlist;
821 struct net_device *link_watch_next;
823 /* register/unregister state machine */
824 enum { NETREG_UNINITIALIZED=0,
825 NETREG_REGISTERED, /* completed register_netdevice */
826 NETREG_UNREGISTERING, /* called unregister_netdevice */
827 NETREG_UNREGISTERED, /* completed unregister todo */
828 NETREG_RELEASED, /* called free_netdev */
829 NETREG_DUMMY, /* dummy device for NAPI poll */
832 /* Called from unregister, can be used to call free_netdev */
833 void (*destructor)(struct net_device *dev);
835 #ifdef CONFIG_NETPOLL
836 struct netpoll_info *npinfo;
840 /* Network namespace this network device is inside */
844 /* mid-layer private */
848 struct net_bridge_port *br_port;
850 struct macvlan_port *macvlan_port;
852 struct garp_port *garp_port;
854 /* class/net/name entry */
856 /* space for optional statistics and wireless sysfs groups */
857 struct attribute_group *sysfs_groups[3];
859 /* rtnetlink link ops */
860 const struct rtnl_link_ops *rtnl_link_ops;
862 /* VLAN feature mask */
863 unsigned long vlan_features;
865 /* for setting kernel sock attribute on TCP connection setup */
866 #define GSO_MAX_SIZE 65536
867 unsigned int gso_max_size;
870 /* Data Center Bridging netlink ops */
871 struct dcbnl_rtnl_ops *dcbnl_ops;
874 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
875 /* max exchange id for FCoE LRO by ddp */
876 unsigned int fcoe_ddp_xid;
879 #ifdef CONFIG_COMPAT_NET_DEV_OPS
881 int (*init)(struct net_device *dev);
882 void (*uninit)(struct net_device *dev);
883 int (*open)(struct net_device *dev);
884 int (*stop)(struct net_device *dev);
885 int (*hard_start_xmit) (struct sk_buff *skb,
886 struct net_device *dev);
887 u16 (*select_queue)(struct net_device *dev,
888 struct sk_buff *skb);
889 void (*change_rx_flags)(struct net_device *dev,
891 void (*set_rx_mode)(struct net_device *dev);
892 void (*set_multicast_list)(struct net_device *dev);
893 int (*set_mac_address)(struct net_device *dev,
895 int (*validate_addr)(struct net_device *dev);
896 int (*do_ioctl)(struct net_device *dev,
897 struct ifreq *ifr, int cmd);
898 int (*set_config)(struct net_device *dev,
900 int (*change_mtu)(struct net_device *dev, int new_mtu);
901 int (*neigh_setup)(struct net_device *dev,
902 struct neigh_parms *);
903 void (*tx_timeout) (struct net_device *dev);
904 struct net_device_stats* (*get_stats)(struct net_device *dev);
905 void (*vlan_rx_register)(struct net_device *dev,
906 struct vlan_group *grp);
907 void (*vlan_rx_add_vid)(struct net_device *dev,
909 void (*vlan_rx_kill_vid)(struct net_device *dev,
911 #ifdef CONFIG_NET_POLL_CONTROLLER
912 void (*poll_controller)(struct net_device *dev);
917 #define to_net_dev(d) container_of(d, struct net_device, dev)
919 #define NETDEV_ALIGN 32
920 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
923 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
926 return &dev->_tx[index];
929 static inline void netdev_for_each_tx_queue(struct net_device *dev,
930 void (*f)(struct net_device *,
931 struct netdev_queue *,
937 for (i = 0; i < dev->num_tx_queues; i++)
938 f(dev, &dev->_tx[i], arg);
942 * Net namespace inlines
945 struct net *dev_net(const struct net_device *dev)
955 void dev_net_set(struct net_device *dev, struct net *net)
958 release_net(dev->nd_net);
959 dev->nd_net = hold_net(net);
963 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
965 #ifdef CONFIG_NET_DSA_TAG_DSA
966 if (dev->dsa_ptr != NULL)
967 return dsa_uses_dsa_tags(dev->dsa_ptr);
973 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
975 #ifdef CONFIG_NET_DSA_TAG_TRAILER
976 if (dev->dsa_ptr != NULL)
977 return dsa_uses_trailer_tags(dev->dsa_ptr);
984 * netdev_priv - access network device private data
985 * @dev: network device
987 * Get network device private data
989 static inline void *netdev_priv(const struct net_device *dev)
991 return (char *)dev + ((sizeof(struct net_device)
992 + NETDEV_ALIGN_CONST)
993 & ~NETDEV_ALIGN_CONST);
996 /* Set the sysfs physical device reference for the network logical device
997 * if set prior to registration will cause a symlink during initialization.
999 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1002 * netif_napi_add - initialize a napi context
1003 * @dev: network device
1004 * @napi: napi context
1005 * @poll: polling function
1006 * @weight: default weight
1008 * netif_napi_add() must be used to initialize a napi context prior to calling
1009 * *any* of the other napi related functions.
1011 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1012 int (*poll)(struct napi_struct *, int), int weight);
1015 * netif_napi_del - remove a napi context
1016 * @napi: napi context
1018 * netif_napi_del() removes a napi context from the network device napi list
1020 void netif_napi_del(struct napi_struct *napi);
1022 struct napi_gro_cb {
1023 /* This indicates where we are processing relative to skb->data. */
1026 /* This is non-zero if the packet may be of the same flow. */
1029 /* This is non-zero if the packet cannot be merged with the new skb. */
1032 /* Number of segments aggregated. */
1039 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1041 struct packet_type {
1042 __be16 type; /* This is really htons(ether_type). */
1043 struct net_device *dev; /* NULL is wildcarded here */
1044 int (*func) (struct sk_buff *,
1045 struct net_device *,
1046 struct packet_type *,
1047 struct net_device *);
1048 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1050 int (*gso_send_check)(struct sk_buff *skb);
1051 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1052 struct sk_buff *skb);
1053 int (*gro_complete)(struct sk_buff *skb);
1054 void *af_packet_priv;
1055 struct list_head list;
1058 #include <linux/interrupt.h>
1059 #include <linux/notifier.h>
1061 extern rwlock_t dev_base_lock; /* Device list lock */
1064 #define for_each_netdev(net, d) \
1065 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1066 #define for_each_netdev_safe(net, d, n) \
1067 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1068 #define for_each_netdev_continue(net, d) \
1069 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1070 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1072 static inline struct net_device *next_net_device(struct net_device *dev)
1074 struct list_head *lh;
1078 lh = dev->dev_list.next;
1079 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1082 static inline struct net_device *first_net_device(struct net *net)
1084 return list_empty(&net->dev_base_head) ? NULL :
1085 net_device_entry(net->dev_base_head.next);
1088 extern int netdev_boot_setup_check(struct net_device *dev);
1089 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1090 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1091 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1092 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1093 extern void dev_add_pack(struct packet_type *pt);
1094 extern void dev_remove_pack(struct packet_type *pt);
1095 extern void __dev_remove_pack(struct packet_type *pt);
1097 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1098 unsigned short mask);
1099 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1100 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1101 extern int dev_alloc_name(struct net_device *dev, const char *name);
1102 extern int dev_open(struct net_device *dev);
1103 extern int dev_close(struct net_device *dev);
1104 extern void dev_disable_lro(struct net_device *dev);
1105 extern int dev_queue_xmit(struct sk_buff *skb);
1106 extern int register_netdevice(struct net_device *dev);
1107 extern void unregister_netdevice(struct net_device *dev);
1108 extern void free_netdev(struct net_device *dev);
1109 extern void synchronize_net(void);
1110 extern int register_netdevice_notifier(struct notifier_block *nb);
1111 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1112 extern int init_dummy_netdev(struct net_device *dev);
1113 extern void netdev_resync_ops(struct net_device *dev);
1115 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1116 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1117 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1118 extern int dev_restart(struct net_device *dev);
1119 #ifdef CONFIG_NETPOLL_TRAP
1120 extern int netpoll_trap(void);
1122 extern void *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
1123 extern int skb_gro_receive(struct sk_buff **head,
1124 struct sk_buff *skb);
1126 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1128 return NAPI_GRO_CB(skb)->data_offset;
1131 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1133 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1136 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1138 NAPI_GRO_CB(skb)->data_offset += len;
1141 static inline void skb_gro_reset_offset(struct sk_buff *skb)
1143 NAPI_GRO_CB(skb)->data_offset = 0;
1146 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1148 return skb_headlen(skb) ? skb_mac_header(skb) :
1149 page_address(skb_shinfo(skb)->frags[0].page) +
1150 skb_shinfo(skb)->frags[0].page_offset;
1153 static inline void *skb_gro_network_header(struct sk_buff *skb)
1155 return skb_headlen(skb) ? skb_network_header(skb) :
1156 page_address(skb_shinfo(skb)->frags[0].page) +
1157 skb_shinfo(skb)->frags[0].page_offset + skb_network_offset(skb);
1160 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1161 unsigned short type,
1162 const void *daddr, const void *saddr,
1165 if (!dev->header_ops || !dev->header_ops->create)
1168 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1171 static inline int dev_parse_header(const struct sk_buff *skb,
1172 unsigned char *haddr)
1174 const struct net_device *dev = skb->dev;
1176 if (!dev->header_ops || !dev->header_ops->parse)
1178 return dev->header_ops->parse(skb, haddr);
1181 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1182 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1183 static inline int unregister_gifconf(unsigned int family)
1185 return register_gifconf(family, NULL);
1189 * Incoming packets are placed on per-cpu queues so that
1190 * no locking is needed.
1194 struct Qdisc *output_queue;
1195 struct sk_buff_head input_pkt_queue;
1196 struct list_head poll_list;
1197 struct sk_buff *completion_queue;
1199 struct napi_struct backlog;
1202 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1204 #define HAVE_NETIF_QUEUE
1206 extern void __netif_schedule(struct Qdisc *q);
1208 static inline void netif_schedule_queue(struct netdev_queue *txq)
1210 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1211 __netif_schedule(txq->qdisc);
1214 static inline void netif_tx_schedule_all(struct net_device *dev)
1218 for (i = 0; i < dev->num_tx_queues; i++)
1219 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1222 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1224 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1228 * netif_start_queue - allow transmit
1229 * @dev: network device
1231 * Allow upper layers to call the device hard_start_xmit routine.
1233 static inline void netif_start_queue(struct net_device *dev)
1235 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1238 static inline void netif_tx_start_all_queues(struct net_device *dev)
1242 for (i = 0; i < dev->num_tx_queues; i++) {
1243 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1244 netif_tx_start_queue(txq);
1248 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1250 #ifdef CONFIG_NETPOLL_TRAP
1251 if (netpoll_trap()) {
1252 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1256 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1257 __netif_schedule(dev_queue->qdisc);
1261 * netif_wake_queue - restart transmit
1262 * @dev: network device
1264 * Allow upper layers to call the device hard_start_xmit routine.
1265 * Used for flow control when transmit resources are available.
1267 static inline void netif_wake_queue(struct net_device *dev)
1269 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1272 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1276 for (i = 0; i < dev->num_tx_queues; i++) {
1277 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1278 netif_tx_wake_queue(txq);
1282 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1284 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1288 * netif_stop_queue - stop transmitted packets
1289 * @dev: network device
1291 * Stop upper layers calling the device hard_start_xmit routine.
1292 * Used for flow control when transmit resources are unavailable.
1294 static inline void netif_stop_queue(struct net_device *dev)
1296 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1299 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1303 for (i = 0; i < dev->num_tx_queues; i++) {
1304 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1305 netif_tx_stop_queue(txq);
1309 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1311 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1315 * netif_queue_stopped - test if transmit queue is flowblocked
1316 * @dev: network device
1318 * Test if transmit queue on device is currently unable to send.
1320 static inline int netif_queue_stopped(const struct net_device *dev)
1322 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1325 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1327 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1331 * netif_running - test if up
1332 * @dev: network device
1334 * Test if the device has been brought up.
1336 static inline int netif_running(const struct net_device *dev)
1338 return test_bit(__LINK_STATE_START, &dev->state);
1342 * Routines to manage the subqueues on a device. We only need start
1343 * stop, and a check if it's stopped. All other device management is
1344 * done at the overall netdevice level.
1345 * Also test the device if we're multiqueue.
1349 * netif_start_subqueue - allow sending packets on subqueue
1350 * @dev: network device
1351 * @queue_index: sub queue index
1353 * Start individual transmit queue of a device with multiple transmit queues.
1355 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1357 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1358 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1362 * netif_stop_subqueue - stop sending packets on subqueue
1363 * @dev: network device
1364 * @queue_index: sub queue index
1366 * Stop individual transmit queue of a device with multiple transmit queues.
1368 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1370 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1371 #ifdef CONFIG_NETPOLL_TRAP
1375 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1379 * netif_subqueue_stopped - test status of subqueue
1380 * @dev: network device
1381 * @queue_index: sub queue index
1383 * Check individual transmit queue of a device with multiple transmit queues.
1385 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1388 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1389 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1392 static inline int netif_subqueue_stopped(const struct net_device *dev,
1393 struct sk_buff *skb)
1395 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1399 * netif_wake_subqueue - allow sending packets on subqueue
1400 * @dev: network device
1401 * @queue_index: sub queue index
1403 * Resume individual transmit queue of a device with multiple transmit queues.
1405 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1407 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1408 #ifdef CONFIG_NETPOLL_TRAP
1412 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1413 __netif_schedule(txq->qdisc);
1417 * netif_is_multiqueue - test if device has multiple transmit queues
1418 * @dev: network device
1420 * Check if device has multiple transmit queues
1422 static inline int netif_is_multiqueue(const struct net_device *dev)
1424 return (dev->num_tx_queues > 1);
1427 /* Use this variant when it is known for sure that it
1428 * is executing from hardware interrupt context or with hardware interrupts
1431 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1433 /* Use this variant in places where it could be invoked
1434 * from either hardware interrupt or other context, with hardware interrupts
1435 * either disabled or enabled.
1437 extern void dev_kfree_skb_any(struct sk_buff *skb);
1439 #define HAVE_NETIF_RX 1
1440 extern int netif_rx(struct sk_buff *skb);
1441 extern int netif_rx_ni(struct sk_buff *skb);
1442 #define HAVE_NETIF_RECEIVE_SKB 1
1443 extern int netif_receive_skb(struct sk_buff *skb);
1444 extern void napi_gro_flush(struct napi_struct *napi);
1445 extern int dev_gro_receive(struct napi_struct *napi,
1446 struct sk_buff *skb);
1447 extern int napi_skb_finish(int ret, struct sk_buff *skb);
1448 extern int napi_gro_receive(struct napi_struct *napi,
1449 struct sk_buff *skb);
1450 extern void napi_reuse_skb(struct napi_struct *napi,
1451 struct sk_buff *skb);
1452 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1453 extern int napi_frags_finish(struct napi_struct *napi,
1454 struct sk_buff *skb, int ret);
1455 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1456 extern int napi_gro_frags(struct napi_struct *napi);
1458 static inline void napi_free_frags(struct napi_struct *napi)
1460 kfree_skb(napi->skb);
1464 extern void netif_nit_deliver(struct sk_buff *skb);
1465 extern int dev_valid_name(const char *name);
1466 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1467 extern int dev_ethtool(struct net *net, struct ifreq *);
1468 extern unsigned dev_get_flags(const struct net_device *);
1469 extern int dev_change_flags(struct net_device *, unsigned);
1470 extern int dev_change_name(struct net_device *, const char *);
1471 extern int dev_set_alias(struct net_device *, const char *, size_t);
1472 extern int dev_change_net_namespace(struct net_device *,
1473 struct net *, const char *);
1474 extern int dev_set_mtu(struct net_device *, int);
1475 extern int dev_set_mac_address(struct net_device *,
1477 extern int dev_hard_start_xmit(struct sk_buff *skb,
1478 struct net_device *dev,
1479 struct netdev_queue *txq);
1481 extern int netdev_budget;
1483 /* Called by rtnetlink.c:rtnl_unlock() */
1484 extern void netdev_run_todo(void);
1487 * dev_put - release reference to device
1488 * @dev: network device
1490 * Release reference to device to allow it to be freed.
1492 static inline void dev_put(struct net_device *dev)
1494 atomic_dec(&dev->refcnt);
1498 * dev_hold - get reference to device
1499 * @dev: network device
1501 * Hold reference to device to keep it from being freed.
1503 static inline void dev_hold(struct net_device *dev)
1505 atomic_inc(&dev->refcnt);
1508 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1509 * and _off may be called from IRQ context, but it is caller
1510 * who is responsible for serialization of these calls.
1512 * The name carrier is inappropriate, these functions should really be
1513 * called netif_lowerlayer_*() because they represent the state of any
1514 * kind of lower layer not just hardware media.
1517 extern void linkwatch_fire_event(struct net_device *dev);
1520 * netif_carrier_ok - test if carrier present
1521 * @dev: network device
1523 * Check if carrier is present on device
1525 static inline int netif_carrier_ok(const struct net_device *dev)
1527 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1530 extern void __netdev_watchdog_up(struct net_device *dev);
1532 extern void netif_carrier_on(struct net_device *dev);
1534 extern void netif_carrier_off(struct net_device *dev);
1537 * netif_dormant_on - mark device as dormant.
1538 * @dev: network device
1540 * Mark device as dormant (as per RFC2863).
1542 * The dormant state indicates that the relevant interface is not
1543 * actually in a condition to pass packets (i.e., it is not 'up') but is
1544 * in a "pending" state, waiting for some external event. For "on-
1545 * demand" interfaces, this new state identifies the situation where the
1546 * interface is waiting for events to place it in the up state.
1549 static inline void netif_dormant_on(struct net_device *dev)
1551 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1552 linkwatch_fire_event(dev);
1556 * netif_dormant_off - set device as not dormant.
1557 * @dev: network device
1559 * Device is not in dormant state.
1561 static inline void netif_dormant_off(struct net_device *dev)
1563 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1564 linkwatch_fire_event(dev);
1568 * netif_dormant - test if carrier present
1569 * @dev: network device
1571 * Check if carrier is present on device
1573 static inline int netif_dormant(const struct net_device *dev)
1575 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1580 * netif_oper_up - test if device is operational
1581 * @dev: network device
1583 * Check if carrier is operational
1585 static inline int netif_oper_up(const struct net_device *dev) {
1586 return (dev->operstate == IF_OPER_UP ||
1587 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1591 * netif_device_present - is device available or removed
1592 * @dev: network device
1594 * Check if device has not been removed from system.
1596 static inline int netif_device_present(struct net_device *dev)
1598 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1601 extern void netif_device_detach(struct net_device *dev);
1603 extern void netif_device_attach(struct net_device *dev);
1606 * Network interface message level settings
1608 #define HAVE_NETIF_MSG 1
1611 NETIF_MSG_DRV = 0x0001,
1612 NETIF_MSG_PROBE = 0x0002,
1613 NETIF_MSG_LINK = 0x0004,
1614 NETIF_MSG_TIMER = 0x0008,
1615 NETIF_MSG_IFDOWN = 0x0010,
1616 NETIF_MSG_IFUP = 0x0020,
1617 NETIF_MSG_RX_ERR = 0x0040,
1618 NETIF_MSG_TX_ERR = 0x0080,
1619 NETIF_MSG_TX_QUEUED = 0x0100,
1620 NETIF_MSG_INTR = 0x0200,
1621 NETIF_MSG_TX_DONE = 0x0400,
1622 NETIF_MSG_RX_STATUS = 0x0800,
1623 NETIF_MSG_PKTDATA = 0x1000,
1624 NETIF_MSG_HW = 0x2000,
1625 NETIF_MSG_WOL = 0x4000,
1628 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1629 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1630 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1631 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1632 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1633 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1634 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1635 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1636 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1637 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1638 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1639 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1640 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1641 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1642 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1644 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1647 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1648 return default_msg_enable_bits;
1649 if (debug_value == 0) /* no output */
1651 /* set low N bits */
1652 return (1 << debug_value) - 1;
1655 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1657 spin_lock(&txq->_xmit_lock);
1658 txq->xmit_lock_owner = cpu;
1661 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1663 spin_lock_bh(&txq->_xmit_lock);
1664 txq->xmit_lock_owner = smp_processor_id();
1667 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1669 int ok = spin_trylock(&txq->_xmit_lock);
1671 txq->xmit_lock_owner = smp_processor_id();
1675 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1677 txq->xmit_lock_owner = -1;
1678 spin_unlock(&txq->_xmit_lock);
1681 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1683 txq->xmit_lock_owner = -1;
1684 spin_unlock_bh(&txq->_xmit_lock);
1688 * netif_tx_lock - grab network device transmit lock
1689 * @dev: network device
1691 * Get network device transmit lock
1693 static inline void netif_tx_lock(struct net_device *dev)
1698 spin_lock(&dev->tx_global_lock);
1699 cpu = smp_processor_id();
1700 for (i = 0; i < dev->num_tx_queues; i++) {
1701 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1703 /* We are the only thread of execution doing a
1704 * freeze, but we have to grab the _xmit_lock in
1705 * order to synchronize with threads which are in
1706 * the ->hard_start_xmit() handler and already
1707 * checked the frozen bit.
1709 __netif_tx_lock(txq, cpu);
1710 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1711 __netif_tx_unlock(txq);
1715 static inline void netif_tx_lock_bh(struct net_device *dev)
1721 static inline void netif_tx_unlock(struct net_device *dev)
1725 for (i = 0; i < dev->num_tx_queues; i++) {
1726 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1728 /* No need to grab the _xmit_lock here. If the
1729 * queue is not stopped for another reason, we
1732 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1733 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1734 __netif_schedule(txq->qdisc);
1736 spin_unlock(&dev->tx_global_lock);
1739 static inline void netif_tx_unlock_bh(struct net_device *dev)
1741 netif_tx_unlock(dev);
1745 #define HARD_TX_LOCK(dev, txq, cpu) { \
1746 if ((dev->features & NETIF_F_LLTX) == 0) { \
1747 __netif_tx_lock(txq, cpu); \
1751 #define HARD_TX_UNLOCK(dev, txq) { \
1752 if ((dev->features & NETIF_F_LLTX) == 0) { \
1753 __netif_tx_unlock(txq); \
1757 static inline void netif_tx_disable(struct net_device *dev)
1763 cpu = smp_processor_id();
1764 for (i = 0; i < dev->num_tx_queues; i++) {
1765 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1767 __netif_tx_lock(txq, cpu);
1768 netif_tx_stop_queue(txq);
1769 __netif_tx_unlock(txq);
1774 static inline void netif_addr_lock(struct net_device *dev)
1776 spin_lock(&dev->addr_list_lock);
1779 static inline void netif_addr_lock_bh(struct net_device *dev)
1781 spin_lock_bh(&dev->addr_list_lock);
1784 static inline void netif_addr_unlock(struct net_device *dev)
1786 spin_unlock(&dev->addr_list_lock);
1789 static inline void netif_addr_unlock_bh(struct net_device *dev)
1791 spin_unlock_bh(&dev->addr_list_lock);
1794 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1796 extern void ether_setup(struct net_device *dev);
1798 /* Support for loadable net-drivers */
1799 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1800 void (*setup)(struct net_device *),
1801 unsigned int queue_count);
1802 #define alloc_netdev(sizeof_priv, name, setup) \
1803 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1804 extern int register_netdev(struct net_device *dev);
1805 extern void unregister_netdev(struct net_device *dev);
1806 /* Functions used for secondary unicast and multicast support */
1807 extern void dev_set_rx_mode(struct net_device *dev);
1808 extern void __dev_set_rx_mode(struct net_device *dev);
1809 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1810 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1811 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1812 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1813 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1814 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1815 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1816 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1817 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1818 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1819 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1820 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1821 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1822 extern int dev_set_allmulti(struct net_device *dev, int inc);
1823 extern void netdev_state_change(struct net_device *dev);
1824 extern void netdev_bonding_change(struct net_device *dev);
1825 extern void netdev_features_change(struct net_device *dev);
1826 /* Load a device via the kmod */
1827 extern void dev_load(struct net *net, const char *name);
1828 extern void dev_mcast_init(void);
1829 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1831 extern int netdev_max_backlog;
1832 extern int weight_p;
1833 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1834 extern int skb_checksum_help(struct sk_buff *skb);
1835 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1837 extern void netdev_rx_csum_fault(struct net_device *dev);
1839 static inline void netdev_rx_csum_fault(struct net_device *dev)
1843 /* rx skb timestamps */
1844 extern void net_enable_timestamp(void);
1845 extern void net_disable_timestamp(void);
1847 #ifdef CONFIG_PROC_FS
1848 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1849 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1850 extern void dev_seq_stop(struct seq_file *seq, void *v);
1853 extern int netdev_class_create_file(struct class_attribute *class_attr);
1854 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1856 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1858 extern void linkwatch_run_queue(void);
1860 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1861 unsigned long mask);
1862 unsigned long netdev_fix_features(unsigned long features, const char *name);
1864 static inline int net_gso_ok(int features, int gso_type)
1866 int feature = gso_type << NETIF_F_GSO_SHIFT;
1867 return (features & feature) == feature;
1870 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1872 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1875 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1877 return skb_is_gso(skb) &&
1878 (!skb_gso_ok(skb, dev->features) ||
1879 (skb_shinfo(skb)->frag_list &&
1880 !(dev->features & NETIF_F_FRAGLIST)) ||
1881 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1884 static inline void netif_set_gso_max_size(struct net_device *dev,
1887 dev->gso_max_size = size;
1890 /* On bonding slaves other than the currently active slave, suppress
1891 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1892 * ARP on active-backup slaves with arp_validate enabled.
1894 static inline int skb_bond_should_drop(struct sk_buff *skb)
1896 struct net_device *dev = skb->dev;
1897 struct net_device *master = dev->master;
1900 if (master->priv_flags & IFF_MASTER_ARPMON)
1901 dev->last_rx = jiffies;
1903 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1904 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1905 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1908 if (master->priv_flags & IFF_MASTER_ALB) {
1909 if (skb->pkt_type != PACKET_BROADCAST &&
1910 skb->pkt_type != PACKET_MULTICAST)
1913 if (master->priv_flags & IFF_MASTER_8023AD &&
1914 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1923 extern struct pernet_operations __net_initdata loopback_net_ops;
1925 static inline int dev_ethtool_get_settings(struct net_device *dev,
1926 struct ethtool_cmd *cmd)
1928 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1930 return dev->ethtool_ops->get_settings(dev, cmd);
1933 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
1935 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
1937 return dev->ethtool_ops->get_rx_csum(dev);
1940 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
1942 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
1944 return dev->ethtool_ops->get_flags(dev);
1946 #endif /* __KERNEL__ */
1948 #endif /* _LINUX_DEV_H */