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>
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>
47 #include <net/dcbnl.h>
55 /* source back-compat hooks */
56 #define SET_ETHTOOL_OPS(netdev,ops) \
57 ( (netdev)->ethtool_ops = (ops) )
59 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
60 functions are available. */
61 #define HAVE_FREE_NETDEV /* free_netdev() */
62 #define HAVE_NETDEV_PRIV /* netdev_priv() */
64 #define NET_XMIT_SUCCESS 0
65 #define NET_XMIT_DROP 1 /* skb dropped */
66 #define NET_XMIT_CN 2 /* congestion notification */
67 #define NET_XMIT_POLICED 3 /* skb is shot by police */
68 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
70 /* Backlog congestion levels */
71 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
72 #define NET_RX_DROP 1 /* packet dropped */
73 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
74 #define NET_RX_CN_MOD 3 /* Storm on its way! */
75 #define NET_RX_CN_HIGH 4 /* The storm is here */
76 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
78 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
79 * indicates that the device will soon be dropping packets, or already drops
80 * some packets of the same priority; prompting us to send less aggressively. */
81 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
82 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
86 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
88 /* Driver transmit return codes */
89 #define NETDEV_TX_OK 0 /* driver took care of packet */
90 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
91 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
96 * Compute the worst case header length according to the protocols
100 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
101 # if defined(CONFIG_MAC80211_MESH)
102 # define LL_MAX_HEADER 128
104 # define LL_MAX_HEADER 96
106 #elif defined(CONFIG_TR)
107 # define LL_MAX_HEADER 48
109 # define LL_MAX_HEADER 32
112 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
113 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
114 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
115 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
116 #define MAX_HEADER LL_MAX_HEADER
118 #define MAX_HEADER (LL_MAX_HEADER + 48)
121 #endif /* __KERNEL__ */
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
128 struct net_device_stats
130 unsigned long rx_packets; /* total packets received */
131 unsigned long tx_packets; /* total packets transmitted */
132 unsigned long rx_bytes; /* total bytes received */
133 unsigned long tx_bytes; /* total bytes transmitted */
134 unsigned long rx_errors; /* bad packets received */
135 unsigned long tx_errors; /* packet transmit problems */
136 unsigned long rx_dropped; /* no space in linux buffers */
137 unsigned long tx_dropped; /* no space available in linux */
138 unsigned long multicast; /* multicast packets received */
139 unsigned long collisions;
141 /* detailed rx_errors: */
142 unsigned long rx_length_errors;
143 unsigned long rx_over_errors; /* receiver ring buff overflow */
144 unsigned long rx_crc_errors; /* recved pkt with crc error */
145 unsigned long rx_frame_errors; /* recv'd frame alignment error */
146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
147 unsigned long rx_missed_errors; /* receiver missed packet */
149 /* detailed tx_errors */
150 unsigned long tx_aborted_errors;
151 unsigned long tx_carrier_errors;
152 unsigned long tx_fifo_errors;
153 unsigned long tx_heartbeat_errors;
154 unsigned long tx_window_errors;
157 unsigned long rx_compressed;
158 unsigned long tx_compressed;
162 /* Media selection options. */
175 #include <linux/cache.h>
176 #include <linux/skbuff.h>
182 struct netif_rx_stats
186 unsigned time_squeeze;
187 unsigned cpu_collision;
190 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
194 struct dev_addr_list *next;
195 u8 da_addr[MAX_ADDR_LEN];
203 * We tag multicasts with these structures.
206 #define dev_mc_list dev_addr_list
207 #define dmi_addr da_addr
208 #define dmi_addrlen da_addrlen
209 #define dmi_users da_users
210 #define dmi_gusers da_gusers
214 struct hh_cache *hh_next; /* Next entry */
215 atomic_t hh_refcnt; /* number of users */
217 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
219 * They are mostly read, but hh_refcnt may be changed quite frequently,
220 * incurring cache line ping pongs.
222 __be16 hh_type ____cacheline_aligned_in_smp;
223 /* protocol identifier, f.e ETH_P_IP
224 * NOTE: For VLANs, this will be the
225 * encapuslated type. --BLG
227 u16 hh_len; /* length of header */
228 int (*hh_output)(struct sk_buff *skb);
231 /* cached hardware header; allow for machine alignment needs. */
232 #define HH_DATA_MOD 16
233 #define HH_DATA_OFF(__len) \
234 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
235 #define HH_DATA_ALIGN(__len) \
236 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
237 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
240 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
242 * dev->hard_header_len ? (dev->hard_header_len +
243 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
245 * We could use other alignment values, but we must maintain the
246 * relationship HH alignment <= LL alignment.
248 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
251 #define LL_RESERVED_SPACE(dev) \
252 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
253 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
254 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
255 #define LL_ALLOCATED_SPACE(dev) \
256 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 int (*create) (struct sk_buff *skb, struct net_device *dev,
260 unsigned short type, const void *daddr,
261 const void *saddr, unsigned len);
262 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
263 int (*rebuild)(struct sk_buff *skb);
264 #define HAVE_HEADER_CACHE
265 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
266 void (*cache_update)(struct hh_cache *hh,
267 const struct net_device *dev,
268 const unsigned char *haddr);
271 /* These flag bits are private to the generic network queueing
272 * layer, they may not be explicitly referenced by any other
279 __LINK_STATE_PRESENT,
280 __LINK_STATE_NOCARRIER,
281 __LINK_STATE_LINKWATCH_PENDING,
282 __LINK_STATE_DORMANT,
287 * This structure holds at boot time configured netdevice settings. They
288 * are then used in the device probing.
290 struct netdev_boot_setup {
294 #define NETDEV_BOOT_SETUP_MAX 8
296 extern int __init netdev_boot_setup(char *str);
299 * Structure for NAPI scheduling similar to tasklet but with weighting
302 /* The poll_list must only be managed by the entity which
303 * changes the state of the NAPI_STATE_SCHED bit. This means
304 * whoever atomically sets that bit can add this napi_struct
305 * to the per-cpu poll_list, and whoever clears that bit
306 * can remove from the list right before clearing the bit.
308 struct list_head poll_list;
312 int (*poll)(struct napi_struct *, int);
313 #ifdef CONFIG_NETPOLL
314 spinlock_t poll_lock;
317 struct net_device *dev;
318 struct list_head dev_list;
319 struct sk_buff *gro_list;
325 NAPI_STATE_SCHED, /* Poll is scheduled */
326 NAPI_STATE_DISABLE, /* Disable pending */
327 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
330 extern void __napi_schedule(struct napi_struct *n);
332 static inline int napi_disable_pending(struct napi_struct *n)
334 return test_bit(NAPI_STATE_DISABLE, &n->state);
338 * napi_schedule_prep - check if napi can be scheduled
341 * Test if NAPI routine is already running, and if not mark
342 * it as running. This is used as a condition variable
343 * insure only one NAPI poll instance runs. We also make
344 * sure there is no pending NAPI disable.
346 static inline int napi_schedule_prep(struct napi_struct *n)
348 return !napi_disable_pending(n) &&
349 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
353 * napi_schedule - schedule NAPI poll
356 * Schedule NAPI poll routine to be called if it is not already
359 static inline void napi_schedule(struct napi_struct *n)
361 if (napi_schedule_prep(n))
365 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
366 static inline int napi_reschedule(struct napi_struct *napi)
368 if (napi_schedule_prep(napi)) {
369 __napi_schedule(napi);
376 * napi_complete - NAPI processing complete
379 * Mark NAPI processing as complete.
381 extern void __napi_complete(struct napi_struct *n);
382 extern void napi_complete(struct napi_struct *n);
385 * napi_disable - prevent NAPI from scheduling
388 * Stop NAPI from being scheduled on this context.
389 * Waits till any outstanding processing completes.
391 static inline void napi_disable(struct napi_struct *n)
393 set_bit(NAPI_STATE_DISABLE, &n->state);
394 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
396 clear_bit(NAPI_STATE_DISABLE, &n->state);
400 * napi_enable - enable NAPI scheduling
403 * Resume NAPI from being scheduled on this context.
404 * Must be paired with napi_disable.
406 static inline void napi_enable(struct napi_struct *n)
408 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
409 smp_mb__before_clear_bit();
410 clear_bit(NAPI_STATE_SCHED, &n->state);
415 * napi_synchronize - wait until NAPI is not running
418 * Wait until NAPI is done being scheduled on this context.
419 * Waits till any outstanding processing completes but
420 * does not disable future activations.
422 static inline void napi_synchronize(const struct napi_struct *n)
424 while (test_bit(NAPI_STATE_SCHED, &n->state))
428 # define napi_synchronize(n) barrier()
431 enum netdev_queue_state_t
434 __QUEUE_STATE_FROZEN,
437 struct netdev_queue {
438 struct net_device *dev;
441 spinlock_t _xmit_lock;
443 struct Qdisc *qdisc_sleeping;
444 } ____cacheline_aligned_in_smp;
448 * This structure defines the management hooks for network devices.
449 * The following hooks can be defined; unless noted otherwise, they are
450 * optional and can be filled with a null pointer.
452 * int (*ndo_init)(struct net_device *dev);
453 * This function is called once when network device is registered.
454 * The network device can use this to any late stage initializaton
455 * or semantic validattion. It can fail with an error code which will
456 * be propogated back to register_netdev
458 * void (*ndo_uninit)(struct net_device *dev);
459 * This function is called when device is unregistered or when registration
460 * fails. It is not called if init fails.
462 * int (*ndo_open)(struct net_device *dev);
463 * This function is called when network device transistions to the up
466 * int (*ndo_stop)(struct net_device *dev);
467 * This function is called when network device transistions to the down
470 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
471 * Called when a packet needs to be transmitted.
472 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
473 * Required can not be NULL.
475 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
476 * Called to decide which queue to when device supports multiple
479 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
480 * This function is called to allow device receiver to make
481 * changes to configuration when multicast or promiscious is enabled.
483 * void (*ndo_set_rx_mode)(struct net_device *dev);
484 * This function is called device changes address list filtering.
486 * void (*ndo_set_multicast_list)(struct net_device *dev);
487 * This function is called when the multicast address list changes.
489 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
490 * This function is called when the Media Access Control address
491 * needs to be changed. If not this interface is not defined, the
492 * mac address can not be changed.
494 * int (*ndo_validate_addr)(struct net_device *dev);
495 * Test if Media Access Control address is valid for the device.
497 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
498 * Called when a user request an ioctl which can't be handled by
499 * the generic interface code. If not defined ioctl's return
500 * not supported error code.
502 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
503 * Used to set network devices bus interface parameters. This interface
504 * is retained for legacy reason, new devices should use the bus
505 * interface (PCI) for low level management.
507 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
508 * Called when a user wants to change the Maximum Transfer Unit
509 * of a device. If not defined, any request to change MTU will
510 * will return an error.
512 * void (*ndo_tx_timeout)(struct net_device *dev);
513 * Callback uses when the transmitter has not made any progress
514 * for dev->watchdog ticks.
516 * struct net_device_stats* (*get_stats)(struct net_device *dev);
517 * Called when a user wants to get the network device usage
518 * statistics. If not defined, the counters in dev->stats will
521 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
522 * If device support VLAN receive accleration
523 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
524 * when vlan groups for the device changes. Note: grp is NULL
525 * if no vlan's groups are being used.
527 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
528 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
529 * this function is called when a VLAN id is registered.
531 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
532 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
533 * this function is called when a VLAN id is unregistered.
535 * void (*ndo_poll_controller)(struct net_device *dev);
537 #define HAVE_NET_DEVICE_OPS
538 struct net_device_ops {
539 int (*ndo_init)(struct net_device *dev);
540 void (*ndo_uninit)(struct net_device *dev);
541 int (*ndo_open)(struct net_device *dev);
542 int (*ndo_stop)(struct net_device *dev);
543 int (*ndo_start_xmit) (struct sk_buff *skb,
544 struct net_device *dev);
545 u16 (*ndo_select_queue)(struct net_device *dev,
546 struct sk_buff *skb);
547 #define HAVE_CHANGE_RX_FLAGS
548 void (*ndo_change_rx_flags)(struct net_device *dev,
550 #define HAVE_SET_RX_MODE
551 void (*ndo_set_rx_mode)(struct net_device *dev);
552 #define HAVE_MULTICAST
553 void (*ndo_set_multicast_list)(struct net_device *dev);
554 #define HAVE_SET_MAC_ADDR
555 int (*ndo_set_mac_address)(struct net_device *dev,
557 #define HAVE_VALIDATE_ADDR
558 int (*ndo_validate_addr)(struct net_device *dev);
559 #define HAVE_PRIVATE_IOCTL
560 int (*ndo_do_ioctl)(struct net_device *dev,
561 struct ifreq *ifr, int cmd);
562 #define HAVE_SET_CONFIG
563 int (*ndo_set_config)(struct net_device *dev,
565 #define HAVE_CHANGE_MTU
566 int (*ndo_change_mtu)(struct net_device *dev,
568 int (*ndo_neigh_setup)(struct net_device *dev,
569 struct neigh_parms *);
570 #define HAVE_TX_TIMEOUT
571 void (*ndo_tx_timeout) (struct net_device *dev);
573 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
575 void (*ndo_vlan_rx_register)(struct net_device *dev,
576 struct vlan_group *grp);
577 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
579 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
581 #ifdef CONFIG_NET_POLL_CONTROLLER
582 #define HAVE_NETDEV_POLL
583 void (*ndo_poll_controller)(struct net_device *dev);
585 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
586 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
588 struct scatterlist *sgl,
590 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
596 * The DEVICE structure.
597 * Actually, this whole structure is a big mistake. It mixes I/O
598 * data with strictly "high-level" data, and it has to know about
599 * almost every data structure used in the INET module.
601 * FIXME: cleanup struct net_device such that network protocol info
609 * This is the first field of the "visible" part of this structure
610 * (i.e. as seen by users in the "Space.c" file). It is the name
614 /* device name hash chain */
615 struct hlist_node name_hlist;
620 * I/O specific fields
621 * FIXME: Merge these and struct ifmap into one
623 unsigned long mem_end; /* shared mem end */
624 unsigned long mem_start; /* shared mem start */
625 unsigned long base_addr; /* device I/O address */
626 unsigned int irq; /* device IRQ number */
629 * Some hardware also needs these fields, but they are not
630 * part of the usual set specified in Space.c.
633 unsigned char if_port; /* Selectable AUI, TP,..*/
634 unsigned char dma; /* DMA channel */
638 struct list_head dev_list;
639 struct list_head napi_list;
641 /* Net device features */
642 unsigned long features;
643 #define NETIF_F_SG 1 /* Scatter/gather IO. */
644 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
645 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
646 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
647 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
648 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
649 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
650 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
651 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
652 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
653 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
654 #define NETIF_F_GSO 2048 /* Enable software GSO. */
655 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
656 /* do not use LLTX in new drivers */
657 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
658 #define NETIF_F_GRO 16384 /* Generic receive offload */
659 #define NETIF_F_LRO 32768 /* large receive offload */
661 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
663 /* Segmentation offload features */
664 #define NETIF_F_GSO_SHIFT 16
665 #define NETIF_F_GSO_MASK 0x00ff0000
666 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
667 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
668 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
669 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
670 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
671 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
673 /* List of features with software fallbacks. */
674 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
677 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
678 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
679 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
680 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
683 * If one device supports one of these features, then enable them
684 * for all in netdev_increment_features.
686 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
687 NETIF_F_SG | NETIF_F_HIGHDMA | \
690 /* Interface index. Unique device identifier */
694 struct net_device_stats stats;
696 #ifdef CONFIG_WIRELESS_EXT
697 /* List of functions to handle Wireless Extensions (instead of ioctl).
698 * See <net/iw_handler.h> for details. Jean II */
699 const struct iw_handler_def * wireless_handlers;
700 /* Instance data managed by the core of Wireless Extensions. */
701 struct iw_public_data * wireless_data;
703 /* Management operations */
704 const struct net_device_ops *netdev_ops;
705 const struct ethtool_ops *ethtool_ops;
707 /* Hardware header description */
708 const struct header_ops *header_ops;
710 unsigned int flags; /* interface flags (a la BSD) */
711 unsigned short gflags;
712 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
713 unsigned short padded; /* How much padding added by alloc_netdev() */
715 unsigned char operstate; /* RFC2863 operstate */
716 unsigned char link_mode; /* mapping policy to operstate */
718 unsigned mtu; /* interface MTU value */
719 unsigned short type; /* interface hardware type */
720 unsigned short hard_header_len; /* hardware hdr length */
722 /* extra head- and tailroom the hardware may need, but not in all cases
723 * can this be guaranteed, especially tailroom. Some cases also use
724 * LL_MAX_HEADER instead to allocate the skb.
726 unsigned short needed_headroom;
727 unsigned short needed_tailroom;
729 struct net_device *master; /* Pointer to master device of a group,
730 * which this device is member of.
733 /* Interface address info. */
734 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
735 unsigned char addr_len; /* hardware address length */
736 unsigned short dev_id; /* for shared network cards */
738 spinlock_t addr_list_lock;
739 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
740 int uc_count; /* Number of installed ucasts */
742 struct dev_addr_list *mc_list; /* Multicast mac addresses */
743 int mc_count; /* Number of installed mcasts */
744 unsigned int promiscuity;
745 unsigned int allmulti;
748 /* Protocol specific pointers */
750 #ifdef CONFIG_NET_DSA
751 void *dsa_ptr; /* dsa specific data */
753 void *atalk_ptr; /* AppleTalk link */
754 void *ip_ptr; /* IPv4 specific data */
755 void *dn_ptr; /* DECnet specific data */
756 void *ip6_ptr; /* IPv6 specific data */
757 void *ec_ptr; /* Econet specific data */
758 void *ax25_ptr; /* AX.25 specific data */
759 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
760 assign before registering */
763 * Cache line mostly used on receive path (including eth_type_trans())
765 unsigned long last_rx; /* Time of last Rx */
766 /* Interface address info used in eth_type_trans() */
767 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
768 because most packets are unicast) */
770 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
772 struct netdev_queue rx_queue;
774 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
776 /* Number of TX queues allocated at alloc_netdev_mq() time */
777 unsigned int num_tx_queues;
779 /* Number of TX queues currently active in device */
780 unsigned int real_num_tx_queues;
782 unsigned long tx_queue_len; /* Max frames per queue allowed */
783 spinlock_t tx_global_lock;
785 * One part is mostly used on xmit path (device)
787 /* These may be needed for future network-power-down code. */
788 unsigned long trans_start; /* Time (in jiffies) of last Tx */
790 int watchdog_timeo; /* used by dev_watchdog() */
791 struct timer_list watchdog_timer;
793 /* Number of references to this device */
794 atomic_t refcnt ____cacheline_aligned_in_smp;
796 /* delayed register/unregister */
797 struct list_head todo_list;
798 /* device index hash chain */
799 struct hlist_node index_hlist;
801 struct net_device *link_watch_next;
803 /* register/unregister state machine */
804 enum { NETREG_UNINITIALIZED=0,
805 NETREG_REGISTERED, /* completed register_netdevice */
806 NETREG_UNREGISTERING, /* called unregister_netdevice */
807 NETREG_UNREGISTERED, /* completed unregister todo */
808 NETREG_RELEASED, /* called free_netdev */
809 NETREG_DUMMY, /* dummy device for NAPI poll */
812 /* Called from unregister, can be used to call free_netdev */
813 void (*destructor)(struct net_device *dev);
815 #ifdef CONFIG_NETPOLL
816 struct netpoll_info *npinfo;
820 /* Network namespace this network device is inside */
824 /* mid-layer private */
828 struct net_bridge_port *br_port;
830 struct macvlan_port *macvlan_port;
832 struct garp_port *garp_port;
834 /* class/net/name entry */
836 /* space for optional statistics and wireless sysfs groups */
837 struct attribute_group *sysfs_groups[3];
839 /* rtnetlink link ops */
840 const struct rtnl_link_ops *rtnl_link_ops;
842 /* VLAN feature mask */
843 unsigned long vlan_features;
845 /* for setting kernel sock attribute on TCP connection setup */
846 #define GSO_MAX_SIZE 65536
847 unsigned int gso_max_size;
850 /* Data Center Bridging netlink ops */
851 struct dcbnl_rtnl_ops *dcbnl_ops;
854 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
855 /* max exchange id for FCoE LRO by ddp */
856 unsigned int fcoe_ddp_xid;
859 #ifdef CONFIG_COMPAT_NET_DEV_OPS
861 int (*init)(struct net_device *dev);
862 void (*uninit)(struct net_device *dev);
863 int (*open)(struct net_device *dev);
864 int (*stop)(struct net_device *dev);
865 int (*hard_start_xmit) (struct sk_buff *skb,
866 struct net_device *dev);
867 u16 (*select_queue)(struct net_device *dev,
868 struct sk_buff *skb);
869 void (*change_rx_flags)(struct net_device *dev,
871 void (*set_rx_mode)(struct net_device *dev);
872 void (*set_multicast_list)(struct net_device *dev);
873 int (*set_mac_address)(struct net_device *dev,
875 int (*validate_addr)(struct net_device *dev);
876 int (*do_ioctl)(struct net_device *dev,
877 struct ifreq *ifr, int cmd);
878 int (*set_config)(struct net_device *dev,
880 int (*change_mtu)(struct net_device *dev, int new_mtu);
881 int (*neigh_setup)(struct net_device *dev,
882 struct neigh_parms *);
883 void (*tx_timeout) (struct net_device *dev);
884 struct net_device_stats* (*get_stats)(struct net_device *dev);
885 void (*vlan_rx_register)(struct net_device *dev,
886 struct vlan_group *grp);
887 void (*vlan_rx_add_vid)(struct net_device *dev,
889 void (*vlan_rx_kill_vid)(struct net_device *dev,
891 #ifdef CONFIG_NET_POLL_CONTROLLER
892 void (*poll_controller)(struct net_device *dev);
897 #define to_net_dev(d) container_of(d, struct net_device, dev)
899 #define NETDEV_ALIGN 32
900 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
903 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
906 return &dev->_tx[index];
909 static inline void netdev_for_each_tx_queue(struct net_device *dev,
910 void (*f)(struct net_device *,
911 struct netdev_queue *,
917 for (i = 0; i < dev->num_tx_queues; i++)
918 f(dev, &dev->_tx[i], arg);
922 * Net namespace inlines
925 struct net *dev_net(const struct net_device *dev)
935 void dev_net_set(struct net_device *dev, struct net *net)
938 release_net(dev->nd_net);
939 dev->nd_net = hold_net(net);
943 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
945 #ifdef CONFIG_NET_DSA_TAG_DSA
946 if (dev->dsa_ptr != NULL)
947 return dsa_uses_dsa_tags(dev->dsa_ptr);
953 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
955 #ifdef CONFIG_NET_DSA_TAG_TRAILER
956 if (dev->dsa_ptr != NULL)
957 return dsa_uses_trailer_tags(dev->dsa_ptr);
964 * netdev_priv - access network device private data
965 * @dev: network device
967 * Get network device private data
969 static inline void *netdev_priv(const struct net_device *dev)
971 return (char *)dev + ((sizeof(struct net_device)
972 + NETDEV_ALIGN_CONST)
973 & ~NETDEV_ALIGN_CONST);
976 /* Set the sysfs physical device reference for the network logical device
977 * if set prior to registration will cause a symlink during initialization.
979 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
982 * netif_napi_add - initialize a napi context
983 * @dev: network device
984 * @napi: napi context
985 * @poll: polling function
986 * @weight: default weight
988 * netif_napi_add() must be used to initialize a napi context prior to calling
989 * *any* of the other napi related functions.
991 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
992 int (*poll)(struct napi_struct *, int), int weight);
995 * netif_napi_del - remove a napi context
996 * @napi: napi context
998 * netif_napi_del() removes a napi context from the network device napi list
1000 void netif_napi_del(struct napi_struct *napi);
1002 struct napi_gro_cb {
1003 /* This is non-zero if the packet may be of the same flow. */
1006 /* This is non-zero if the packet cannot be merged with the new skb. */
1009 /* Number of segments aggregated. */
1016 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1018 struct packet_type {
1019 __be16 type; /* This is really htons(ether_type). */
1020 struct net_device *dev; /* NULL is wildcarded here */
1021 int (*func) (struct sk_buff *,
1022 struct net_device *,
1023 struct packet_type *,
1024 struct net_device *);
1025 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1027 int (*gso_send_check)(struct sk_buff *skb);
1028 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1029 struct sk_buff *skb);
1030 int (*gro_complete)(struct sk_buff *skb);
1031 void *af_packet_priv;
1032 struct list_head list;
1035 struct napi_gro_fraginfo {
1036 skb_frag_t frags[MAX_SKB_FRAGS];
1037 unsigned int nr_frags;
1038 unsigned int ip_summed;
1043 #include <linux/interrupt.h>
1044 #include <linux/notifier.h>
1046 extern rwlock_t dev_base_lock; /* Device list lock */
1049 #define for_each_netdev(net, d) \
1050 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1051 #define for_each_netdev_safe(net, d, n) \
1052 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1053 #define for_each_netdev_continue(net, d) \
1054 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1055 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1057 static inline struct net_device *next_net_device(struct net_device *dev)
1059 struct list_head *lh;
1063 lh = dev->dev_list.next;
1064 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1067 static inline struct net_device *first_net_device(struct net *net)
1069 return list_empty(&net->dev_base_head) ? NULL :
1070 net_device_entry(net->dev_base_head.next);
1073 extern int netdev_boot_setup_check(struct net_device *dev);
1074 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1075 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1076 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1077 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1078 extern void dev_add_pack(struct packet_type *pt);
1079 extern void dev_remove_pack(struct packet_type *pt);
1080 extern void __dev_remove_pack(struct packet_type *pt);
1082 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1083 unsigned short mask);
1084 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1085 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1086 extern int dev_alloc_name(struct net_device *dev, const char *name);
1087 extern int dev_open(struct net_device *dev);
1088 extern int dev_close(struct net_device *dev);
1089 extern void dev_disable_lro(struct net_device *dev);
1090 extern int dev_queue_xmit(struct sk_buff *skb);
1091 extern int register_netdevice(struct net_device *dev);
1092 extern void unregister_netdevice(struct net_device *dev);
1093 extern void free_netdev(struct net_device *dev);
1094 extern void synchronize_net(void);
1095 extern int register_netdevice_notifier(struct notifier_block *nb);
1096 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1097 extern int init_dummy_netdev(struct net_device *dev);
1099 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1100 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1101 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1102 extern int dev_restart(struct net_device *dev);
1103 #ifdef CONFIG_NETPOLL_TRAP
1104 extern int netpoll_trap(void);
1107 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1108 unsigned short type,
1109 const void *daddr, const void *saddr,
1112 if (!dev->header_ops || !dev->header_ops->create)
1115 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1118 static inline int dev_parse_header(const struct sk_buff *skb,
1119 unsigned char *haddr)
1121 const struct net_device *dev = skb->dev;
1123 if (!dev->header_ops || !dev->header_ops->parse)
1125 return dev->header_ops->parse(skb, haddr);
1128 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1129 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1130 static inline int unregister_gifconf(unsigned int family)
1132 return register_gifconf(family, NULL);
1136 * Incoming packets are placed on per-cpu queues so that
1137 * no locking is needed.
1141 struct Qdisc *output_queue;
1142 struct sk_buff_head input_pkt_queue;
1143 struct list_head poll_list;
1144 struct sk_buff *completion_queue;
1146 struct napi_struct backlog;
1149 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1151 #define HAVE_NETIF_QUEUE
1153 extern void __netif_schedule(struct Qdisc *q);
1155 static inline void netif_schedule_queue(struct netdev_queue *txq)
1157 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1158 __netif_schedule(txq->qdisc);
1161 static inline void netif_tx_schedule_all(struct net_device *dev)
1165 for (i = 0; i < dev->num_tx_queues; i++)
1166 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1169 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1171 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1175 * netif_start_queue - allow transmit
1176 * @dev: network device
1178 * Allow upper layers to call the device hard_start_xmit routine.
1180 static inline void netif_start_queue(struct net_device *dev)
1182 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1185 static inline void netif_tx_start_all_queues(struct net_device *dev)
1189 for (i = 0; i < dev->num_tx_queues; i++) {
1190 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1191 netif_tx_start_queue(txq);
1195 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1197 #ifdef CONFIG_NETPOLL_TRAP
1198 if (netpoll_trap()) {
1199 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1203 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1204 __netif_schedule(dev_queue->qdisc);
1208 * netif_wake_queue - restart transmit
1209 * @dev: network device
1211 * Allow upper layers to call the device hard_start_xmit routine.
1212 * Used for flow control when transmit resources are available.
1214 static inline void netif_wake_queue(struct net_device *dev)
1216 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1219 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1223 for (i = 0; i < dev->num_tx_queues; i++) {
1224 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1225 netif_tx_wake_queue(txq);
1229 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1231 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1235 * netif_stop_queue - stop transmitted packets
1236 * @dev: network device
1238 * Stop upper layers calling the device hard_start_xmit routine.
1239 * Used for flow control when transmit resources are unavailable.
1241 static inline void netif_stop_queue(struct net_device *dev)
1243 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1246 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1250 for (i = 0; i < dev->num_tx_queues; i++) {
1251 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1252 netif_tx_stop_queue(txq);
1256 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1258 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1262 * netif_queue_stopped - test if transmit queue is flowblocked
1263 * @dev: network device
1265 * Test if transmit queue on device is currently unable to send.
1267 static inline int netif_queue_stopped(const struct net_device *dev)
1269 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1272 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1274 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1278 * netif_running - test if up
1279 * @dev: network device
1281 * Test if the device has been brought up.
1283 static inline int netif_running(const struct net_device *dev)
1285 return test_bit(__LINK_STATE_START, &dev->state);
1289 * Routines to manage the subqueues on a device. We only need start
1290 * stop, and a check if it's stopped. All other device management is
1291 * done at the overall netdevice level.
1292 * Also test the device if we're multiqueue.
1296 * netif_start_subqueue - allow sending packets on subqueue
1297 * @dev: network device
1298 * @queue_index: sub queue index
1300 * Start individual transmit queue of a device with multiple transmit queues.
1302 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1304 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1305 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1309 * netif_stop_subqueue - stop sending packets on subqueue
1310 * @dev: network device
1311 * @queue_index: sub queue index
1313 * Stop individual transmit queue of a device with multiple transmit queues.
1315 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1317 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1318 #ifdef CONFIG_NETPOLL_TRAP
1322 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1326 * netif_subqueue_stopped - test status of subqueue
1327 * @dev: network device
1328 * @queue_index: sub queue index
1330 * Check individual transmit queue of a device with multiple transmit queues.
1332 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1335 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1336 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1339 static inline int netif_subqueue_stopped(const struct net_device *dev,
1340 struct sk_buff *skb)
1342 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1346 * netif_wake_subqueue - allow sending packets on subqueue
1347 * @dev: network device
1348 * @queue_index: sub queue index
1350 * Resume individual transmit queue of a device with multiple transmit queues.
1352 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1354 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1355 #ifdef CONFIG_NETPOLL_TRAP
1359 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1360 __netif_schedule(txq->qdisc);
1364 * netif_is_multiqueue - test if device has multiple transmit queues
1365 * @dev: network device
1367 * Check if device has multiple transmit queues
1369 static inline int netif_is_multiqueue(const struct net_device *dev)
1371 return (dev->num_tx_queues > 1);
1374 /* Use this variant when it is known for sure that it
1375 * is executing from hardware interrupt context or with hardware interrupts
1378 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1380 /* Use this variant in places where it could be invoked
1381 * from either hardware interrupt or other context, with hardware interrupts
1382 * either disabled or enabled.
1384 extern void dev_kfree_skb_any(struct sk_buff *skb);
1386 #define HAVE_NETIF_RX 1
1387 extern int netif_rx(struct sk_buff *skb);
1388 extern int netif_rx_ni(struct sk_buff *skb);
1389 #define HAVE_NETIF_RECEIVE_SKB 1
1390 extern int netif_receive_skb(struct sk_buff *skb);
1391 extern void napi_gro_flush(struct napi_struct *napi);
1392 extern int dev_gro_receive(struct napi_struct *napi,
1393 struct sk_buff *skb);
1394 extern int napi_gro_receive(struct napi_struct *napi,
1395 struct sk_buff *skb);
1396 extern void napi_reuse_skb(struct napi_struct *napi,
1397 struct sk_buff *skb);
1398 extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi,
1399 struct napi_gro_fraginfo *info);
1400 extern int napi_gro_frags(struct napi_struct *napi,
1401 struct napi_gro_fraginfo *info);
1402 extern void netif_nit_deliver(struct sk_buff *skb);
1403 extern int dev_valid_name(const char *name);
1404 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1405 extern int dev_ethtool(struct net *net, struct ifreq *);
1406 extern unsigned dev_get_flags(const struct net_device *);
1407 extern int dev_change_flags(struct net_device *, unsigned);
1408 extern int dev_change_name(struct net_device *, const char *);
1409 extern int dev_set_alias(struct net_device *, const char *, size_t);
1410 extern int dev_change_net_namespace(struct net_device *,
1411 struct net *, const char *);
1412 extern int dev_set_mtu(struct net_device *, int);
1413 extern int dev_set_mac_address(struct net_device *,
1415 extern int dev_hard_start_xmit(struct sk_buff *skb,
1416 struct net_device *dev,
1417 struct netdev_queue *txq);
1419 extern int netdev_budget;
1421 /* Called by rtnetlink.c:rtnl_unlock() */
1422 extern void netdev_run_todo(void);
1425 * dev_put - release reference to device
1426 * @dev: network device
1428 * Release reference to device to allow it to be freed.
1430 static inline void dev_put(struct net_device *dev)
1432 atomic_dec(&dev->refcnt);
1436 * dev_hold - get reference to device
1437 * @dev: network device
1439 * Hold reference to device to keep it from being freed.
1441 static inline void dev_hold(struct net_device *dev)
1443 atomic_inc(&dev->refcnt);
1446 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1447 * and _off may be called from IRQ context, but it is caller
1448 * who is responsible for serialization of these calls.
1450 * The name carrier is inappropriate, these functions should really be
1451 * called netif_lowerlayer_*() because they represent the state of any
1452 * kind of lower layer not just hardware media.
1455 extern void linkwatch_fire_event(struct net_device *dev);
1458 * netif_carrier_ok - test if carrier present
1459 * @dev: network device
1461 * Check if carrier is present on device
1463 static inline int netif_carrier_ok(const struct net_device *dev)
1465 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1468 extern void __netdev_watchdog_up(struct net_device *dev);
1470 extern void netif_carrier_on(struct net_device *dev);
1472 extern void netif_carrier_off(struct net_device *dev);
1475 * netif_dormant_on - mark device as dormant.
1476 * @dev: network device
1478 * Mark device as dormant (as per RFC2863).
1480 * The dormant state indicates that the relevant interface is not
1481 * actually in a condition to pass packets (i.e., it is not 'up') but is
1482 * in a "pending" state, waiting for some external event. For "on-
1483 * demand" interfaces, this new state identifies the situation where the
1484 * interface is waiting for events to place it in the up state.
1487 static inline void netif_dormant_on(struct net_device *dev)
1489 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1490 linkwatch_fire_event(dev);
1494 * netif_dormant_off - set device as not dormant.
1495 * @dev: network device
1497 * Device is not in dormant state.
1499 static inline void netif_dormant_off(struct net_device *dev)
1501 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1502 linkwatch_fire_event(dev);
1506 * netif_dormant - test if carrier present
1507 * @dev: network device
1509 * Check if carrier is present on device
1511 static inline int netif_dormant(const struct net_device *dev)
1513 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1518 * netif_oper_up - test if device is operational
1519 * @dev: network device
1521 * Check if carrier is operational
1523 static inline int netif_oper_up(const struct net_device *dev) {
1524 return (dev->operstate == IF_OPER_UP ||
1525 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1529 * netif_device_present - is device available or removed
1530 * @dev: network device
1532 * Check if device has not been removed from system.
1534 static inline int netif_device_present(struct net_device *dev)
1536 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1539 extern void netif_device_detach(struct net_device *dev);
1541 extern void netif_device_attach(struct net_device *dev);
1544 * Network interface message level settings
1546 #define HAVE_NETIF_MSG 1
1549 NETIF_MSG_DRV = 0x0001,
1550 NETIF_MSG_PROBE = 0x0002,
1551 NETIF_MSG_LINK = 0x0004,
1552 NETIF_MSG_TIMER = 0x0008,
1553 NETIF_MSG_IFDOWN = 0x0010,
1554 NETIF_MSG_IFUP = 0x0020,
1555 NETIF_MSG_RX_ERR = 0x0040,
1556 NETIF_MSG_TX_ERR = 0x0080,
1557 NETIF_MSG_TX_QUEUED = 0x0100,
1558 NETIF_MSG_INTR = 0x0200,
1559 NETIF_MSG_TX_DONE = 0x0400,
1560 NETIF_MSG_RX_STATUS = 0x0800,
1561 NETIF_MSG_PKTDATA = 0x1000,
1562 NETIF_MSG_HW = 0x2000,
1563 NETIF_MSG_WOL = 0x4000,
1566 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1567 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1568 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1569 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1570 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1571 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1572 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1573 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1574 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1575 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1576 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1577 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1578 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1579 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1580 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1582 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1585 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1586 return default_msg_enable_bits;
1587 if (debug_value == 0) /* no output */
1589 /* set low N bits */
1590 return (1 << debug_value) - 1;
1593 /* Test if receive needs to be scheduled but only if up */
1594 static inline int netif_rx_schedule_prep(struct napi_struct *napi)
1596 return napi_schedule_prep(napi);
1599 /* Add interface to tail of rx poll list. This assumes that _prep has
1600 * already been called and returned 1.
1602 static inline void __netif_rx_schedule(struct napi_struct *napi)
1604 __napi_schedule(napi);
1607 /* Try to reschedule poll. Called by irq handler. */
1609 static inline void netif_rx_schedule(struct napi_struct *napi)
1611 if (netif_rx_schedule_prep(napi))
1612 __netif_rx_schedule(napi);
1615 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1616 static inline int netif_rx_reschedule(struct napi_struct *napi)
1618 if (napi_schedule_prep(napi)) {
1619 __netif_rx_schedule(napi);
1625 /* same as netif_rx_complete, except that local_irq_save(flags)
1626 * has already been issued
1628 static inline void __netif_rx_complete(struct napi_struct *napi)
1630 __napi_complete(napi);
1633 /* Remove interface from poll list: it must be in the poll list
1634 * on current cpu. This primitive is called by dev->poll(), when
1635 * it completes the work. The device cannot be out of poll list at this
1636 * moment, it is BUG().
1638 static inline void netif_rx_complete(struct napi_struct *napi)
1640 napi_complete(napi);
1643 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1645 spin_lock(&txq->_xmit_lock);
1646 txq->xmit_lock_owner = cpu;
1649 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1651 spin_lock_bh(&txq->_xmit_lock);
1652 txq->xmit_lock_owner = smp_processor_id();
1655 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1657 int ok = spin_trylock(&txq->_xmit_lock);
1659 txq->xmit_lock_owner = smp_processor_id();
1663 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1665 txq->xmit_lock_owner = -1;
1666 spin_unlock(&txq->_xmit_lock);
1669 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1671 txq->xmit_lock_owner = -1;
1672 spin_unlock_bh(&txq->_xmit_lock);
1676 * netif_tx_lock - grab network device transmit lock
1677 * @dev: network device
1679 * Get network device transmit lock
1681 static inline void netif_tx_lock(struct net_device *dev)
1686 spin_lock(&dev->tx_global_lock);
1687 cpu = smp_processor_id();
1688 for (i = 0; i < dev->num_tx_queues; i++) {
1689 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1691 /* We are the only thread of execution doing a
1692 * freeze, but we have to grab the _xmit_lock in
1693 * order to synchronize with threads which are in
1694 * the ->hard_start_xmit() handler and already
1695 * checked the frozen bit.
1697 __netif_tx_lock(txq, cpu);
1698 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1699 __netif_tx_unlock(txq);
1703 static inline void netif_tx_lock_bh(struct net_device *dev)
1709 static inline void netif_tx_unlock(struct net_device *dev)
1713 for (i = 0; i < dev->num_tx_queues; i++) {
1714 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1716 /* No need to grab the _xmit_lock here. If the
1717 * queue is not stopped for another reason, we
1720 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1721 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1722 __netif_schedule(txq->qdisc);
1724 spin_unlock(&dev->tx_global_lock);
1727 static inline void netif_tx_unlock_bh(struct net_device *dev)
1729 netif_tx_unlock(dev);
1733 #define HARD_TX_LOCK(dev, txq, cpu) { \
1734 if ((dev->features & NETIF_F_LLTX) == 0) { \
1735 __netif_tx_lock(txq, cpu); \
1739 #define HARD_TX_UNLOCK(dev, txq) { \
1740 if ((dev->features & NETIF_F_LLTX) == 0) { \
1741 __netif_tx_unlock(txq); \
1745 static inline void netif_tx_disable(struct net_device *dev)
1751 cpu = smp_processor_id();
1752 for (i = 0; i < dev->num_tx_queues; i++) {
1753 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1755 __netif_tx_lock(txq, cpu);
1756 netif_tx_stop_queue(txq);
1757 __netif_tx_unlock(txq);
1762 static inline void netif_addr_lock(struct net_device *dev)
1764 spin_lock(&dev->addr_list_lock);
1767 static inline void netif_addr_lock_bh(struct net_device *dev)
1769 spin_lock_bh(&dev->addr_list_lock);
1772 static inline void netif_addr_unlock(struct net_device *dev)
1774 spin_unlock(&dev->addr_list_lock);
1777 static inline void netif_addr_unlock_bh(struct net_device *dev)
1779 spin_unlock_bh(&dev->addr_list_lock);
1782 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1784 extern void ether_setup(struct net_device *dev);
1786 /* Support for loadable net-drivers */
1787 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1788 void (*setup)(struct net_device *),
1789 unsigned int queue_count);
1790 #define alloc_netdev(sizeof_priv, name, setup) \
1791 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1792 extern int register_netdev(struct net_device *dev);
1793 extern void unregister_netdev(struct net_device *dev);
1794 /* Functions used for secondary unicast and multicast support */
1795 extern void dev_set_rx_mode(struct net_device *dev);
1796 extern void __dev_set_rx_mode(struct net_device *dev);
1797 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1798 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1799 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1800 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1801 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1802 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1803 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1804 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1805 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1806 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1807 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1808 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1809 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1810 extern int dev_set_allmulti(struct net_device *dev, int inc);
1811 extern void netdev_state_change(struct net_device *dev);
1812 extern void netdev_bonding_change(struct net_device *dev);
1813 extern void netdev_features_change(struct net_device *dev);
1814 /* Load a device via the kmod */
1815 extern void dev_load(struct net *net, const char *name);
1816 extern void dev_mcast_init(void);
1817 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1819 extern int netdev_max_backlog;
1820 extern int weight_p;
1821 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1822 extern int skb_checksum_help(struct sk_buff *skb);
1823 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1825 extern void netdev_rx_csum_fault(struct net_device *dev);
1827 static inline void netdev_rx_csum_fault(struct net_device *dev)
1831 /* rx skb timestamps */
1832 extern void net_enable_timestamp(void);
1833 extern void net_disable_timestamp(void);
1835 #ifdef CONFIG_PROC_FS
1836 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1837 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1838 extern void dev_seq_stop(struct seq_file *seq, void *v);
1841 extern int netdev_class_create_file(struct class_attribute *class_attr);
1842 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1844 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1846 extern void linkwatch_run_queue(void);
1848 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1849 unsigned long mask);
1850 unsigned long netdev_fix_features(unsigned long features, const char *name);
1852 static inline int net_gso_ok(int features, int gso_type)
1854 int feature = gso_type << NETIF_F_GSO_SHIFT;
1855 return (features & feature) == feature;
1858 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1860 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1863 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1865 return skb_is_gso(skb) &&
1866 (!skb_gso_ok(skb, dev->features) ||
1867 (skb_shinfo(skb)->frag_list &&
1868 !(dev->features & NETIF_F_FRAGLIST)) ||
1869 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1872 static inline void netif_set_gso_max_size(struct net_device *dev,
1875 dev->gso_max_size = size;
1878 /* On bonding slaves other than the currently active slave, suppress
1879 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1880 * ARP on active-backup slaves with arp_validate enabled.
1882 static inline int skb_bond_should_drop(struct sk_buff *skb)
1884 struct net_device *dev = skb->dev;
1885 struct net_device *master = dev->master;
1888 if (master->priv_flags & IFF_MASTER_ARPMON)
1889 dev->last_rx = jiffies;
1891 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1892 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1893 skb->protocol == __constant_htons(ETH_P_ARP))
1896 if (master->priv_flags & IFF_MASTER_ALB) {
1897 if (skb->pkt_type != PACKET_BROADCAST &&
1898 skb->pkt_type != PACKET_MULTICAST)
1901 if (master->priv_flags & IFF_MASTER_8023AD &&
1902 skb->protocol == __constant_htons(ETH_P_SLOW))
1911 extern struct pernet_operations __net_initdata loopback_net_ops;
1912 #endif /* __KERNEL__ */
1914 #endif /* _LINUX_DEV_H */