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 {
450 struct net_device *dev;
453 spinlock_t _xmit_lock;
455 struct Qdisc *qdisc_sleeping;
456 } ____cacheline_aligned_in_smp;
460 * This structure defines the management hooks for network devices.
461 * The following hooks can be defined; unless noted otherwise, they are
462 * optional and can be filled with a null pointer.
464 * int (*ndo_init)(struct net_device *dev);
465 * This function is called once when network device is registered.
466 * The network device can use this to any late stage initializaton
467 * or semantic validattion. It can fail with an error code which will
468 * be propogated back to register_netdev
470 * void (*ndo_uninit)(struct net_device *dev);
471 * This function is called when device is unregistered or when registration
472 * fails. It is not called if init fails.
474 * int (*ndo_open)(struct net_device *dev);
475 * This function is called when network device transistions to the up
478 * int (*ndo_stop)(struct net_device *dev);
479 * This function is called when network device transistions to the down
482 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
483 * Called when a packet needs to be transmitted.
484 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
485 * Required can not be NULL.
487 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
488 * Called to decide which queue to when device supports multiple
491 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
492 * This function is called to allow device receiver to make
493 * changes to configuration when multicast or promiscious is enabled.
495 * void (*ndo_set_rx_mode)(struct net_device *dev);
496 * This function is called device changes address list filtering.
498 * void (*ndo_set_multicast_list)(struct net_device *dev);
499 * This function is called when the multicast address list changes.
501 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
502 * This function is called when the Media Access Control address
503 * needs to be changed. If not this interface is not defined, the
504 * mac address can not be changed.
506 * int (*ndo_validate_addr)(struct net_device *dev);
507 * Test if Media Access Control address is valid for the device.
509 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
510 * Called when a user request an ioctl which can't be handled by
511 * the generic interface code. If not defined ioctl's return
512 * not supported error code.
514 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
515 * Used to set network devices bus interface parameters. This interface
516 * is retained for legacy reason, new devices should use the bus
517 * interface (PCI) for low level management.
519 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
520 * Called when a user wants to change the Maximum Transfer Unit
521 * of a device. If not defined, any request to change MTU will
522 * will return an error.
524 * void (*ndo_tx_timeout)(struct net_device *dev);
525 * Callback uses when the transmitter has not made any progress
526 * for dev->watchdog ticks.
528 * struct net_device_stats* (*get_stats)(struct net_device *dev);
529 * Called when a user wants to get the network device usage
530 * statistics. If not defined, the counters in dev->stats will
533 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
534 * If device support VLAN receive accleration
535 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
536 * when vlan groups for the device changes. Note: grp is NULL
537 * if no vlan's groups are being used.
539 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
540 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
541 * this function is called when a VLAN id is registered.
543 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
544 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
545 * this function is called when a VLAN id is unregistered.
547 * void (*ndo_poll_controller)(struct net_device *dev);
549 #define HAVE_NET_DEVICE_OPS
550 struct net_device_ops {
551 int (*ndo_init)(struct net_device *dev);
552 void (*ndo_uninit)(struct net_device *dev);
553 int (*ndo_open)(struct net_device *dev);
554 int (*ndo_stop)(struct net_device *dev);
555 int (*ndo_start_xmit) (struct sk_buff *skb,
556 struct net_device *dev);
557 u16 (*ndo_select_queue)(struct net_device *dev,
558 struct sk_buff *skb);
559 #define HAVE_CHANGE_RX_FLAGS
560 void (*ndo_change_rx_flags)(struct net_device *dev,
562 #define HAVE_SET_RX_MODE
563 void (*ndo_set_rx_mode)(struct net_device *dev);
564 #define HAVE_MULTICAST
565 void (*ndo_set_multicast_list)(struct net_device *dev);
566 #define HAVE_SET_MAC_ADDR
567 int (*ndo_set_mac_address)(struct net_device *dev,
569 #define HAVE_VALIDATE_ADDR
570 int (*ndo_validate_addr)(struct net_device *dev);
571 #define HAVE_PRIVATE_IOCTL
572 int (*ndo_do_ioctl)(struct net_device *dev,
573 struct ifreq *ifr, int cmd);
574 #define HAVE_SET_CONFIG
575 int (*ndo_set_config)(struct net_device *dev,
577 #define HAVE_CHANGE_MTU
578 int (*ndo_change_mtu)(struct net_device *dev,
580 int (*ndo_neigh_setup)(struct net_device *dev,
581 struct neigh_parms *);
582 #define HAVE_TX_TIMEOUT
583 void (*ndo_tx_timeout) (struct net_device *dev);
585 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
587 void (*ndo_vlan_rx_register)(struct net_device *dev,
588 struct vlan_group *grp);
589 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
591 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
593 #ifdef CONFIG_NET_POLL_CONTROLLER
594 #define HAVE_NETDEV_POLL
595 void (*ndo_poll_controller)(struct net_device *dev);
597 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
598 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
600 struct scatterlist *sgl,
602 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
608 * The DEVICE structure.
609 * Actually, this whole structure is a big mistake. It mixes I/O
610 * data with strictly "high-level" data, and it has to know about
611 * almost every data structure used in the INET module.
613 * FIXME: cleanup struct net_device such that network protocol info
621 * This is the first field of the "visible" part of this structure
622 * (i.e. as seen by users in the "Space.c" file). It is the name
626 /* device name hash chain */
627 struct hlist_node name_hlist;
632 * I/O specific fields
633 * FIXME: Merge these and struct ifmap into one
635 unsigned long mem_end; /* shared mem end */
636 unsigned long mem_start; /* shared mem start */
637 unsigned long base_addr; /* device I/O address */
638 unsigned int irq; /* device IRQ number */
641 * Some hardware also needs these fields, but they are not
642 * part of the usual set specified in Space.c.
645 unsigned char if_port; /* Selectable AUI, TP,..*/
646 unsigned char dma; /* DMA channel */
650 struct list_head dev_list;
651 struct list_head napi_list;
653 /* Net device features */
654 unsigned long features;
655 #define NETIF_F_SG 1 /* Scatter/gather IO. */
656 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
657 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
658 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
659 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
660 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
661 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
662 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
663 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
664 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
665 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
666 #define NETIF_F_GSO 2048 /* Enable software GSO. */
667 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
668 /* do not use LLTX in new drivers */
669 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
670 #define NETIF_F_GRO 16384 /* Generic receive offload */
671 #define NETIF_F_LRO 32768 /* large receive offload */
673 /* the GSO_MASK reserves bits 16 through 23 */
674 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
675 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
677 /* Segmentation offload features */
678 #define NETIF_F_GSO_SHIFT 16
679 #define NETIF_F_GSO_MASK 0x00ff0000
680 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
681 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
682 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
683 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
684 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
685 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
687 /* List of features with software fallbacks. */
688 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
691 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
692 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
693 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
694 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
697 * If one device supports one of these features, then enable them
698 * for all in netdev_increment_features.
700 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
701 NETIF_F_SG | NETIF_F_HIGHDMA | \
704 /* Interface index. Unique device identifier */
708 struct net_device_stats stats;
710 #ifdef CONFIG_WIRELESS_EXT
711 /* List of functions to handle Wireless Extensions (instead of ioctl).
712 * See <net/iw_handler.h> for details. Jean II */
713 const struct iw_handler_def * wireless_handlers;
714 /* Instance data managed by the core of Wireless Extensions. */
715 struct iw_public_data * wireless_data;
717 /* Management operations */
718 const struct net_device_ops *netdev_ops;
719 const struct ethtool_ops *ethtool_ops;
721 /* Hardware header description */
722 const struct header_ops *header_ops;
724 unsigned int flags; /* interface flags (a la BSD) */
725 unsigned short gflags;
726 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
727 unsigned short padded; /* How much padding added by alloc_netdev() */
729 unsigned char operstate; /* RFC2863 operstate */
730 unsigned char link_mode; /* mapping policy to operstate */
732 unsigned mtu; /* interface MTU value */
733 unsigned short type; /* interface hardware type */
734 unsigned short hard_header_len; /* hardware hdr length */
736 /* extra head- and tailroom the hardware may need, but not in all cases
737 * can this be guaranteed, especially tailroom. Some cases also use
738 * LL_MAX_HEADER instead to allocate the skb.
740 unsigned short needed_headroom;
741 unsigned short needed_tailroom;
743 struct net_device *master; /* Pointer to master device of a group,
744 * which this device is member of.
747 /* Interface address info. */
748 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
749 unsigned char addr_len; /* hardware address length */
750 unsigned short dev_id; /* for shared network cards */
752 spinlock_t addr_list_lock;
753 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
754 int uc_count; /* Number of installed ucasts */
756 struct dev_addr_list *mc_list; /* Multicast mac addresses */
757 int mc_count; /* Number of installed mcasts */
758 unsigned int promiscuity;
759 unsigned int allmulti;
762 /* Protocol specific pointers */
764 #ifdef CONFIG_NET_DSA
765 void *dsa_ptr; /* dsa specific data */
767 void *atalk_ptr; /* AppleTalk link */
768 void *ip_ptr; /* IPv4 specific data */
769 void *dn_ptr; /* DECnet specific data */
770 void *ip6_ptr; /* IPv6 specific data */
771 void *ec_ptr; /* Econet specific data */
772 void *ax25_ptr; /* AX.25 specific data */
773 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
774 assign before registering */
777 * Cache line mostly used on receive path (including eth_type_trans())
779 unsigned long last_rx; /* Time of last Rx */
780 /* Interface address info used in eth_type_trans() */
781 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
782 because most packets are unicast) */
784 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
786 struct netdev_queue rx_queue;
788 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
790 /* Number of TX queues allocated at alloc_netdev_mq() time */
791 unsigned int num_tx_queues;
793 /* Number of TX queues currently active in device */
794 unsigned int real_num_tx_queues;
796 unsigned long tx_queue_len; /* Max frames per queue allowed */
797 spinlock_t tx_global_lock;
799 * One part is mostly used on xmit path (device)
801 /* These may be needed for future network-power-down code. */
802 unsigned long trans_start; /* Time (in jiffies) of last Tx */
804 int watchdog_timeo; /* used by dev_watchdog() */
805 struct timer_list watchdog_timer;
807 /* Number of references to this device */
808 atomic_t refcnt ____cacheline_aligned_in_smp;
810 /* delayed register/unregister */
811 struct list_head todo_list;
812 /* device index hash chain */
813 struct hlist_node index_hlist;
815 struct net_device *link_watch_next;
817 /* register/unregister state machine */
818 enum { NETREG_UNINITIALIZED=0,
819 NETREG_REGISTERED, /* completed register_netdevice */
820 NETREG_UNREGISTERING, /* called unregister_netdevice */
821 NETREG_UNREGISTERED, /* completed unregister todo */
822 NETREG_RELEASED, /* called free_netdev */
823 NETREG_DUMMY, /* dummy device for NAPI poll */
826 /* Called from unregister, can be used to call free_netdev */
827 void (*destructor)(struct net_device *dev);
829 #ifdef CONFIG_NETPOLL
830 struct netpoll_info *npinfo;
834 /* Network namespace this network device is inside */
838 /* mid-layer private */
842 struct net_bridge_port *br_port;
844 struct macvlan_port *macvlan_port;
846 struct garp_port *garp_port;
848 /* class/net/name entry */
850 /* space for optional statistics and wireless sysfs groups */
851 struct attribute_group *sysfs_groups[3];
853 /* rtnetlink link ops */
854 const struct rtnl_link_ops *rtnl_link_ops;
856 /* VLAN feature mask */
857 unsigned long vlan_features;
859 /* for setting kernel sock attribute on TCP connection setup */
860 #define GSO_MAX_SIZE 65536
861 unsigned int gso_max_size;
864 /* Data Center Bridging netlink ops */
865 struct dcbnl_rtnl_ops *dcbnl_ops;
868 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
869 /* max exchange id for FCoE LRO by ddp */
870 unsigned int fcoe_ddp_xid;
873 #ifdef CONFIG_COMPAT_NET_DEV_OPS
875 int (*init)(struct net_device *dev);
876 void (*uninit)(struct net_device *dev);
877 int (*open)(struct net_device *dev);
878 int (*stop)(struct net_device *dev);
879 int (*hard_start_xmit) (struct sk_buff *skb,
880 struct net_device *dev);
881 u16 (*select_queue)(struct net_device *dev,
882 struct sk_buff *skb);
883 void (*change_rx_flags)(struct net_device *dev,
885 void (*set_rx_mode)(struct net_device *dev);
886 void (*set_multicast_list)(struct net_device *dev);
887 int (*set_mac_address)(struct net_device *dev,
889 int (*validate_addr)(struct net_device *dev);
890 int (*do_ioctl)(struct net_device *dev,
891 struct ifreq *ifr, int cmd);
892 int (*set_config)(struct net_device *dev,
894 int (*change_mtu)(struct net_device *dev, int new_mtu);
895 int (*neigh_setup)(struct net_device *dev,
896 struct neigh_parms *);
897 void (*tx_timeout) (struct net_device *dev);
898 struct net_device_stats* (*get_stats)(struct net_device *dev);
899 void (*vlan_rx_register)(struct net_device *dev,
900 struct vlan_group *grp);
901 void (*vlan_rx_add_vid)(struct net_device *dev,
903 void (*vlan_rx_kill_vid)(struct net_device *dev,
905 #ifdef CONFIG_NET_POLL_CONTROLLER
906 void (*poll_controller)(struct net_device *dev);
911 #define to_net_dev(d) container_of(d, struct net_device, dev)
913 #define NETDEV_ALIGN 32
914 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
917 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
920 return &dev->_tx[index];
923 static inline void netdev_for_each_tx_queue(struct net_device *dev,
924 void (*f)(struct net_device *,
925 struct netdev_queue *,
931 for (i = 0; i < dev->num_tx_queues; i++)
932 f(dev, &dev->_tx[i], arg);
936 * Net namespace inlines
939 struct net *dev_net(const struct net_device *dev)
949 void dev_net_set(struct net_device *dev, struct net *net)
952 release_net(dev->nd_net);
953 dev->nd_net = hold_net(net);
957 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
959 #ifdef CONFIG_NET_DSA_TAG_DSA
960 if (dev->dsa_ptr != NULL)
961 return dsa_uses_dsa_tags(dev->dsa_ptr);
967 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
969 #ifdef CONFIG_NET_DSA_TAG_TRAILER
970 if (dev->dsa_ptr != NULL)
971 return dsa_uses_trailer_tags(dev->dsa_ptr);
978 * netdev_priv - access network device private data
979 * @dev: network device
981 * Get network device private data
983 static inline void *netdev_priv(const struct net_device *dev)
985 return (char *)dev + ((sizeof(struct net_device)
986 + NETDEV_ALIGN_CONST)
987 & ~NETDEV_ALIGN_CONST);
990 /* Set the sysfs physical device reference for the network logical device
991 * if set prior to registration will cause a symlink during initialization.
993 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
996 * netif_napi_add - initialize a napi context
997 * @dev: network device
998 * @napi: napi context
999 * @poll: polling function
1000 * @weight: default weight
1002 * netif_napi_add() must be used to initialize a napi context prior to calling
1003 * *any* of the other napi related functions.
1005 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1006 int (*poll)(struct napi_struct *, int), int weight);
1009 * netif_napi_del - remove a napi context
1010 * @napi: napi context
1012 * netif_napi_del() removes a napi context from the network device napi list
1014 void netif_napi_del(struct napi_struct *napi);
1016 struct napi_gro_cb {
1017 /* This indicates where we are processing relative to skb->data. */
1020 /* This is non-zero if the packet may be of the same flow. */
1023 /* This is non-zero if the packet cannot be merged with the new skb. */
1026 /* Number of segments aggregated. */
1033 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1035 struct packet_type {
1036 __be16 type; /* This is really htons(ether_type). */
1037 struct net_device *dev; /* NULL is wildcarded here */
1038 int (*func) (struct sk_buff *,
1039 struct net_device *,
1040 struct packet_type *,
1041 struct net_device *);
1042 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1044 int (*gso_send_check)(struct sk_buff *skb);
1045 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1046 struct sk_buff *skb);
1047 int (*gro_complete)(struct sk_buff *skb);
1048 void *af_packet_priv;
1049 struct list_head list;
1052 #include <linux/interrupt.h>
1053 #include <linux/notifier.h>
1055 extern rwlock_t dev_base_lock; /* Device list lock */
1058 #define for_each_netdev(net, d) \
1059 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1060 #define for_each_netdev_safe(net, d, n) \
1061 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1062 #define for_each_netdev_continue(net, d) \
1063 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1064 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1066 static inline struct net_device *next_net_device(struct net_device *dev)
1068 struct list_head *lh;
1072 lh = dev->dev_list.next;
1073 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1076 static inline struct net_device *first_net_device(struct net *net)
1078 return list_empty(&net->dev_base_head) ? NULL :
1079 net_device_entry(net->dev_base_head.next);
1082 extern int netdev_boot_setup_check(struct net_device *dev);
1083 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1084 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1085 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1086 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1087 extern void dev_add_pack(struct packet_type *pt);
1088 extern void dev_remove_pack(struct packet_type *pt);
1089 extern void __dev_remove_pack(struct packet_type *pt);
1091 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1092 unsigned short mask);
1093 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1094 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1095 extern int dev_alloc_name(struct net_device *dev, const char *name);
1096 extern int dev_open(struct net_device *dev);
1097 extern int dev_close(struct net_device *dev);
1098 extern void dev_disable_lro(struct net_device *dev);
1099 extern int dev_queue_xmit(struct sk_buff *skb);
1100 extern int register_netdevice(struct net_device *dev);
1101 extern void unregister_netdevice(struct net_device *dev);
1102 extern void free_netdev(struct net_device *dev);
1103 extern void synchronize_net(void);
1104 extern int register_netdevice_notifier(struct notifier_block *nb);
1105 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1106 extern int init_dummy_netdev(struct net_device *dev);
1107 extern void netdev_resync_ops(struct net_device *dev);
1109 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1110 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1111 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1112 extern int dev_restart(struct net_device *dev);
1113 #ifdef CONFIG_NETPOLL_TRAP
1114 extern int netpoll_trap(void);
1116 extern void *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
1117 extern int skb_gro_receive(struct sk_buff **head,
1118 struct sk_buff *skb);
1120 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1122 return NAPI_GRO_CB(skb)->data_offset;
1125 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1127 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1130 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1132 NAPI_GRO_CB(skb)->data_offset += len;
1135 static inline void skb_gro_reset_offset(struct sk_buff *skb)
1137 NAPI_GRO_CB(skb)->data_offset = 0;
1140 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1142 return skb_headlen(skb) ? skb_mac_header(skb) :
1143 page_address(skb_shinfo(skb)->frags[0].page) +
1144 skb_shinfo(skb)->frags[0].page_offset;
1147 static inline void *skb_gro_network_header(struct sk_buff *skb)
1149 return skb_headlen(skb) ? skb_network_header(skb) :
1150 page_address(skb_shinfo(skb)->frags[0].page) +
1151 skb_shinfo(skb)->frags[0].page_offset + skb_network_offset(skb);
1154 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1155 unsigned short type,
1156 const void *daddr, const void *saddr,
1159 if (!dev->header_ops || !dev->header_ops->create)
1162 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1165 static inline int dev_parse_header(const struct sk_buff *skb,
1166 unsigned char *haddr)
1168 const struct net_device *dev = skb->dev;
1170 if (!dev->header_ops || !dev->header_ops->parse)
1172 return dev->header_ops->parse(skb, haddr);
1175 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1176 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1177 static inline int unregister_gifconf(unsigned int family)
1179 return register_gifconf(family, NULL);
1183 * Incoming packets are placed on per-cpu queues so that
1184 * no locking is needed.
1188 struct Qdisc *output_queue;
1189 struct sk_buff_head input_pkt_queue;
1190 struct list_head poll_list;
1191 struct sk_buff *completion_queue;
1193 struct napi_struct backlog;
1196 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1198 #define HAVE_NETIF_QUEUE
1200 extern void __netif_schedule(struct Qdisc *q);
1202 static inline void netif_schedule_queue(struct netdev_queue *txq)
1204 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1205 __netif_schedule(txq->qdisc);
1208 static inline void netif_tx_schedule_all(struct net_device *dev)
1212 for (i = 0; i < dev->num_tx_queues; i++)
1213 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1216 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1218 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1222 * netif_start_queue - allow transmit
1223 * @dev: network device
1225 * Allow upper layers to call the device hard_start_xmit routine.
1227 static inline void netif_start_queue(struct net_device *dev)
1229 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1232 static inline void netif_tx_start_all_queues(struct net_device *dev)
1236 for (i = 0; i < dev->num_tx_queues; i++) {
1237 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1238 netif_tx_start_queue(txq);
1242 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1244 #ifdef CONFIG_NETPOLL_TRAP
1245 if (netpoll_trap()) {
1246 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1250 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1251 __netif_schedule(dev_queue->qdisc);
1255 * netif_wake_queue - restart transmit
1256 * @dev: network device
1258 * Allow upper layers to call the device hard_start_xmit routine.
1259 * Used for flow control when transmit resources are available.
1261 static inline void netif_wake_queue(struct net_device *dev)
1263 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1266 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1270 for (i = 0; i < dev->num_tx_queues; i++) {
1271 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1272 netif_tx_wake_queue(txq);
1276 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1278 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1282 * netif_stop_queue - stop transmitted packets
1283 * @dev: network device
1285 * Stop upper layers calling the device hard_start_xmit routine.
1286 * Used for flow control when transmit resources are unavailable.
1288 static inline void netif_stop_queue(struct net_device *dev)
1290 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1293 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1297 for (i = 0; i < dev->num_tx_queues; i++) {
1298 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1299 netif_tx_stop_queue(txq);
1303 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1305 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1309 * netif_queue_stopped - test if transmit queue is flowblocked
1310 * @dev: network device
1312 * Test if transmit queue on device is currently unable to send.
1314 static inline int netif_queue_stopped(const struct net_device *dev)
1316 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1319 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1321 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1325 * netif_running - test if up
1326 * @dev: network device
1328 * Test if the device has been brought up.
1330 static inline int netif_running(const struct net_device *dev)
1332 return test_bit(__LINK_STATE_START, &dev->state);
1336 * Routines to manage the subqueues on a device. We only need start
1337 * stop, and a check if it's stopped. All other device management is
1338 * done at the overall netdevice level.
1339 * Also test the device if we're multiqueue.
1343 * netif_start_subqueue - allow sending packets on subqueue
1344 * @dev: network device
1345 * @queue_index: sub queue index
1347 * Start individual transmit queue of a device with multiple transmit queues.
1349 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1351 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1352 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1356 * netif_stop_subqueue - stop sending packets on subqueue
1357 * @dev: network device
1358 * @queue_index: sub queue index
1360 * Stop individual transmit queue of a device with multiple transmit queues.
1362 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1364 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1365 #ifdef CONFIG_NETPOLL_TRAP
1369 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1373 * netif_subqueue_stopped - test status of subqueue
1374 * @dev: network device
1375 * @queue_index: sub queue index
1377 * Check individual transmit queue of a device with multiple transmit queues.
1379 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1382 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1383 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1386 static inline int netif_subqueue_stopped(const struct net_device *dev,
1387 struct sk_buff *skb)
1389 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1393 * netif_wake_subqueue - allow sending packets on subqueue
1394 * @dev: network device
1395 * @queue_index: sub queue index
1397 * Resume individual transmit queue of a device with multiple transmit queues.
1399 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1401 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1402 #ifdef CONFIG_NETPOLL_TRAP
1406 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1407 __netif_schedule(txq->qdisc);
1411 * netif_is_multiqueue - test if device has multiple transmit queues
1412 * @dev: network device
1414 * Check if device has multiple transmit queues
1416 static inline int netif_is_multiqueue(const struct net_device *dev)
1418 return (dev->num_tx_queues > 1);
1421 /* Use this variant when it is known for sure that it
1422 * is executing from hardware interrupt context or with hardware interrupts
1425 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1427 /* Use this variant in places where it could be invoked
1428 * from either hardware interrupt or other context, with hardware interrupts
1429 * either disabled or enabled.
1431 extern void dev_kfree_skb_any(struct sk_buff *skb);
1433 #define HAVE_NETIF_RX 1
1434 extern int netif_rx(struct sk_buff *skb);
1435 extern int netif_rx_ni(struct sk_buff *skb);
1436 #define HAVE_NETIF_RECEIVE_SKB 1
1437 extern int netif_receive_skb(struct sk_buff *skb);
1438 extern void napi_gro_flush(struct napi_struct *napi);
1439 extern int dev_gro_receive(struct napi_struct *napi,
1440 struct sk_buff *skb);
1441 extern int napi_skb_finish(int ret, struct sk_buff *skb);
1442 extern int napi_gro_receive(struct napi_struct *napi,
1443 struct sk_buff *skb);
1444 extern void napi_reuse_skb(struct napi_struct *napi,
1445 struct sk_buff *skb);
1446 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1447 extern int napi_frags_finish(struct napi_struct *napi,
1448 struct sk_buff *skb, int ret);
1449 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1450 extern int napi_gro_frags(struct napi_struct *napi);
1452 static inline void napi_free_frags(struct napi_struct *napi)
1454 kfree_skb(napi->skb);
1458 extern void netif_nit_deliver(struct sk_buff *skb);
1459 extern int dev_valid_name(const char *name);
1460 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1461 extern int dev_ethtool(struct net *net, struct ifreq *);
1462 extern unsigned dev_get_flags(const struct net_device *);
1463 extern int dev_change_flags(struct net_device *, unsigned);
1464 extern int dev_change_name(struct net_device *, const char *);
1465 extern int dev_set_alias(struct net_device *, const char *, size_t);
1466 extern int dev_change_net_namespace(struct net_device *,
1467 struct net *, const char *);
1468 extern int dev_set_mtu(struct net_device *, int);
1469 extern int dev_set_mac_address(struct net_device *,
1471 extern int dev_hard_start_xmit(struct sk_buff *skb,
1472 struct net_device *dev,
1473 struct netdev_queue *txq);
1475 extern int netdev_budget;
1477 /* Called by rtnetlink.c:rtnl_unlock() */
1478 extern void netdev_run_todo(void);
1481 * dev_put - release reference to device
1482 * @dev: network device
1484 * Release reference to device to allow it to be freed.
1486 static inline void dev_put(struct net_device *dev)
1488 atomic_dec(&dev->refcnt);
1492 * dev_hold - get reference to device
1493 * @dev: network device
1495 * Hold reference to device to keep it from being freed.
1497 static inline void dev_hold(struct net_device *dev)
1499 atomic_inc(&dev->refcnt);
1502 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1503 * and _off may be called from IRQ context, but it is caller
1504 * who is responsible for serialization of these calls.
1506 * The name carrier is inappropriate, these functions should really be
1507 * called netif_lowerlayer_*() because they represent the state of any
1508 * kind of lower layer not just hardware media.
1511 extern void linkwatch_fire_event(struct net_device *dev);
1514 * netif_carrier_ok - test if carrier present
1515 * @dev: network device
1517 * Check if carrier is present on device
1519 static inline int netif_carrier_ok(const struct net_device *dev)
1521 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1524 extern void __netdev_watchdog_up(struct net_device *dev);
1526 extern void netif_carrier_on(struct net_device *dev);
1528 extern void netif_carrier_off(struct net_device *dev);
1531 * netif_dormant_on - mark device as dormant.
1532 * @dev: network device
1534 * Mark device as dormant (as per RFC2863).
1536 * The dormant state indicates that the relevant interface is not
1537 * actually in a condition to pass packets (i.e., it is not 'up') but is
1538 * in a "pending" state, waiting for some external event. For "on-
1539 * demand" interfaces, this new state identifies the situation where the
1540 * interface is waiting for events to place it in the up state.
1543 static inline void netif_dormant_on(struct net_device *dev)
1545 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1546 linkwatch_fire_event(dev);
1550 * netif_dormant_off - set device as not dormant.
1551 * @dev: network device
1553 * Device is not in dormant state.
1555 static inline void netif_dormant_off(struct net_device *dev)
1557 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1558 linkwatch_fire_event(dev);
1562 * netif_dormant - test if carrier present
1563 * @dev: network device
1565 * Check if carrier is present on device
1567 static inline int netif_dormant(const struct net_device *dev)
1569 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1574 * netif_oper_up - test if device is operational
1575 * @dev: network device
1577 * Check if carrier is operational
1579 static inline int netif_oper_up(const struct net_device *dev) {
1580 return (dev->operstate == IF_OPER_UP ||
1581 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1585 * netif_device_present - is device available or removed
1586 * @dev: network device
1588 * Check if device has not been removed from system.
1590 static inline int netif_device_present(struct net_device *dev)
1592 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1595 extern void netif_device_detach(struct net_device *dev);
1597 extern void netif_device_attach(struct net_device *dev);
1600 * Network interface message level settings
1602 #define HAVE_NETIF_MSG 1
1605 NETIF_MSG_DRV = 0x0001,
1606 NETIF_MSG_PROBE = 0x0002,
1607 NETIF_MSG_LINK = 0x0004,
1608 NETIF_MSG_TIMER = 0x0008,
1609 NETIF_MSG_IFDOWN = 0x0010,
1610 NETIF_MSG_IFUP = 0x0020,
1611 NETIF_MSG_RX_ERR = 0x0040,
1612 NETIF_MSG_TX_ERR = 0x0080,
1613 NETIF_MSG_TX_QUEUED = 0x0100,
1614 NETIF_MSG_INTR = 0x0200,
1615 NETIF_MSG_TX_DONE = 0x0400,
1616 NETIF_MSG_RX_STATUS = 0x0800,
1617 NETIF_MSG_PKTDATA = 0x1000,
1618 NETIF_MSG_HW = 0x2000,
1619 NETIF_MSG_WOL = 0x4000,
1622 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1623 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1624 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1625 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1626 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1627 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1628 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1629 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1630 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1631 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1632 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1633 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1634 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1635 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1636 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1638 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1641 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1642 return default_msg_enable_bits;
1643 if (debug_value == 0) /* no output */
1645 /* set low N bits */
1646 return (1 << debug_value) - 1;
1649 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1651 spin_lock(&txq->_xmit_lock);
1652 txq->xmit_lock_owner = cpu;
1655 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1657 spin_lock_bh(&txq->_xmit_lock);
1658 txq->xmit_lock_owner = smp_processor_id();
1661 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1663 int ok = spin_trylock(&txq->_xmit_lock);
1665 txq->xmit_lock_owner = smp_processor_id();
1669 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1671 txq->xmit_lock_owner = -1;
1672 spin_unlock(&txq->_xmit_lock);
1675 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1677 txq->xmit_lock_owner = -1;
1678 spin_unlock_bh(&txq->_xmit_lock);
1682 * netif_tx_lock - grab network device transmit lock
1683 * @dev: network device
1685 * Get network device transmit lock
1687 static inline void netif_tx_lock(struct net_device *dev)
1692 spin_lock(&dev->tx_global_lock);
1693 cpu = smp_processor_id();
1694 for (i = 0; i < dev->num_tx_queues; i++) {
1695 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1697 /* We are the only thread of execution doing a
1698 * freeze, but we have to grab the _xmit_lock in
1699 * order to synchronize with threads which are in
1700 * the ->hard_start_xmit() handler and already
1701 * checked the frozen bit.
1703 __netif_tx_lock(txq, cpu);
1704 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1705 __netif_tx_unlock(txq);
1709 static inline void netif_tx_lock_bh(struct net_device *dev)
1715 static inline void netif_tx_unlock(struct net_device *dev)
1719 for (i = 0; i < dev->num_tx_queues; i++) {
1720 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1722 /* No need to grab the _xmit_lock here. If the
1723 * queue is not stopped for another reason, we
1726 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1727 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1728 __netif_schedule(txq->qdisc);
1730 spin_unlock(&dev->tx_global_lock);
1733 static inline void netif_tx_unlock_bh(struct net_device *dev)
1735 netif_tx_unlock(dev);
1739 #define HARD_TX_LOCK(dev, txq, cpu) { \
1740 if ((dev->features & NETIF_F_LLTX) == 0) { \
1741 __netif_tx_lock(txq, cpu); \
1745 #define HARD_TX_UNLOCK(dev, txq) { \
1746 if ((dev->features & NETIF_F_LLTX) == 0) { \
1747 __netif_tx_unlock(txq); \
1751 static inline void netif_tx_disable(struct net_device *dev)
1757 cpu = smp_processor_id();
1758 for (i = 0; i < dev->num_tx_queues; i++) {
1759 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1761 __netif_tx_lock(txq, cpu);
1762 netif_tx_stop_queue(txq);
1763 __netif_tx_unlock(txq);
1768 static inline void netif_addr_lock(struct net_device *dev)
1770 spin_lock(&dev->addr_list_lock);
1773 static inline void netif_addr_lock_bh(struct net_device *dev)
1775 spin_lock_bh(&dev->addr_list_lock);
1778 static inline void netif_addr_unlock(struct net_device *dev)
1780 spin_unlock(&dev->addr_list_lock);
1783 static inline void netif_addr_unlock_bh(struct net_device *dev)
1785 spin_unlock_bh(&dev->addr_list_lock);
1788 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1790 extern void ether_setup(struct net_device *dev);
1792 /* Support for loadable net-drivers */
1793 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1794 void (*setup)(struct net_device *),
1795 unsigned int queue_count);
1796 #define alloc_netdev(sizeof_priv, name, setup) \
1797 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1798 extern int register_netdev(struct net_device *dev);
1799 extern void unregister_netdev(struct net_device *dev);
1800 /* Functions used for secondary unicast and multicast support */
1801 extern void dev_set_rx_mode(struct net_device *dev);
1802 extern void __dev_set_rx_mode(struct net_device *dev);
1803 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1804 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1805 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1806 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1807 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1808 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1809 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1810 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1811 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1812 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1813 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1814 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1815 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1816 extern int dev_set_allmulti(struct net_device *dev, int inc);
1817 extern void netdev_state_change(struct net_device *dev);
1818 extern void netdev_bonding_change(struct net_device *dev);
1819 extern void netdev_features_change(struct net_device *dev);
1820 /* Load a device via the kmod */
1821 extern void dev_load(struct net *net, const char *name);
1822 extern void dev_mcast_init(void);
1823 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1825 extern int netdev_max_backlog;
1826 extern int weight_p;
1827 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1828 extern int skb_checksum_help(struct sk_buff *skb);
1829 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1831 extern void netdev_rx_csum_fault(struct net_device *dev);
1833 static inline void netdev_rx_csum_fault(struct net_device *dev)
1837 /* rx skb timestamps */
1838 extern void net_enable_timestamp(void);
1839 extern void net_disable_timestamp(void);
1841 #ifdef CONFIG_PROC_FS
1842 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1843 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1844 extern void dev_seq_stop(struct seq_file *seq, void *v);
1847 extern int netdev_class_create_file(struct class_attribute *class_attr);
1848 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1850 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1852 extern void linkwatch_run_queue(void);
1854 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1855 unsigned long mask);
1856 unsigned long netdev_fix_features(unsigned long features, const char *name);
1858 static inline int net_gso_ok(int features, int gso_type)
1860 int feature = gso_type << NETIF_F_GSO_SHIFT;
1861 return (features & feature) == feature;
1864 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1866 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1869 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1871 return skb_is_gso(skb) &&
1872 (!skb_gso_ok(skb, dev->features) ||
1873 (skb_shinfo(skb)->frag_list &&
1874 !(dev->features & NETIF_F_FRAGLIST)) ||
1875 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1878 static inline void netif_set_gso_max_size(struct net_device *dev,
1881 dev->gso_max_size = size;
1884 /* On bonding slaves other than the currently active slave, suppress
1885 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1886 * ARP on active-backup slaves with arp_validate enabled.
1888 static inline int skb_bond_should_drop(struct sk_buff *skb)
1890 struct net_device *dev = skb->dev;
1891 struct net_device *master = dev->master;
1894 if (master->priv_flags & IFF_MASTER_ARPMON)
1895 dev->last_rx = jiffies;
1897 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1898 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1899 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1902 if (master->priv_flags & IFF_MASTER_ALB) {
1903 if (skb->pkt_type != PACKET_BROADCAST &&
1904 skb->pkt_type != PACKET_MULTICAST)
1907 if (master->priv_flags & IFF_MASTER_8023AD &&
1908 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1917 extern struct pernet_operations __net_initdata loopback_net_ops;
1919 static inline int dev_ethtool_get_settings(struct net_device *dev,
1920 struct ethtool_cmd *cmd)
1922 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1924 return dev->ethtool_ops->get_settings(dev, cmd);
1927 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
1929 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
1931 return dev->ethtool_ops->get_rx_csum(dev);
1934 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
1936 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
1938 return dev->ethtool_ops->get_flags(dev);
1940 #endif /* __KERNEL__ */
1942 #endif /* _LINUX_DEV_H */