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;
316 struct net_device *dev;
317 struct list_head dev_list;
323 NAPI_STATE_SCHED, /* Poll is scheduled */
324 NAPI_STATE_DISABLE, /* Disable pending */
325 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
328 extern void __napi_schedule(struct napi_struct *n);
330 static inline int napi_disable_pending(struct napi_struct *n)
332 return test_bit(NAPI_STATE_DISABLE, &n->state);
336 * napi_schedule_prep - check if napi can be scheduled
339 * Test if NAPI routine is already running, and if not mark
340 * it as running. This is used as a condition variable
341 * insure only one NAPI poll instance runs. We also make
342 * sure there is no pending NAPI disable.
344 static inline int napi_schedule_prep(struct napi_struct *n)
346 return !napi_disable_pending(n) &&
347 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
351 * napi_schedule - schedule NAPI poll
354 * Schedule NAPI poll routine to be called if it is not already
357 static inline void napi_schedule(struct napi_struct *n)
359 if (napi_schedule_prep(n))
363 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
364 static inline int napi_reschedule(struct napi_struct *napi)
366 if (napi_schedule_prep(napi)) {
367 __napi_schedule(napi);
374 * napi_complete - NAPI processing complete
377 * Mark NAPI processing as complete.
379 static inline void __napi_complete(struct napi_struct *n)
381 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
382 list_del(&n->poll_list);
383 smp_mb__before_clear_bit();
384 clear_bit(NAPI_STATE_SCHED, &n->state);
387 static inline void napi_complete(struct napi_struct *n)
391 local_irq_save(flags);
393 local_irq_restore(flags);
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_hard_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);
600 * The DEVICE structure.
601 * Actually, this whole structure is a big mistake. It mixes I/O
602 * data with strictly "high-level" data, and it has to know about
603 * almost every data structure used in the INET module.
605 * FIXME: cleanup struct net_device such that network protocol info
613 * This is the first field of the "visible" part of this structure
614 * (i.e. as seen by users in the "Space.c" file). It is the name
618 /* device name hash chain */
619 struct hlist_node name_hlist;
624 * I/O specific fields
625 * FIXME: Merge these and struct ifmap into one
627 unsigned long mem_end; /* shared mem end */
628 unsigned long mem_start; /* shared mem start */
629 unsigned long base_addr; /* device I/O address */
630 unsigned int irq; /* device IRQ number */
633 * Some hardware also needs these fields, but they are not
634 * part of the usual set specified in Space.c.
637 unsigned char if_port; /* Selectable AUI, TP,..*/
638 unsigned char dma; /* DMA channel */
642 struct list_head dev_list;
643 #ifdef CONFIG_NETPOLL
644 struct list_head napi_list;
647 /* Net device features */
648 unsigned long features;
649 #define NETIF_F_SG 1 /* Scatter/gather IO. */
650 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
651 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
652 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
653 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
654 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
655 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
656 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
657 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
658 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
659 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
660 #define NETIF_F_GSO 2048 /* Enable software GSO. */
661 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
662 /* do not use LLTX in new drivers */
663 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
664 #define NETIF_F_LRO 32768 /* large receive offload */
666 /* Segmentation offload features */
667 #define NETIF_F_GSO_SHIFT 16
668 #define NETIF_F_GSO_MASK 0xffff0000
669 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
670 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
671 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
672 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
673 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
675 /* List of features with software fallbacks. */
676 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
679 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
680 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
681 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
682 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
685 * If one device supports one of these features, then enable them
686 * for all in netdev_increment_features.
688 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
689 NETIF_F_SG | NETIF_F_HIGHDMA | \
692 /* Interface index. Unique device identifier */
696 struct net_device_stats stats;
698 #ifdef CONFIG_WIRELESS_EXT
699 /* List of functions to handle Wireless Extensions (instead of ioctl).
700 * See <net/iw_handler.h> for details. Jean II */
701 const struct iw_handler_def * wireless_handlers;
702 /* Instance data managed by the core of Wireless Extensions. */
703 struct iw_public_data * wireless_data;
705 /* Management operations */
706 const struct net_device_ops *netdev_ops;
707 const struct ethtool_ops *ethtool_ops;
709 /* Hardware header description */
710 const struct header_ops *header_ops;
712 unsigned int flags; /* interface flags (a la BSD) */
713 unsigned short gflags;
714 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
715 unsigned short padded; /* How much padding added by alloc_netdev() */
717 unsigned char operstate; /* RFC2863 operstate */
718 unsigned char link_mode; /* mapping policy to operstate */
720 unsigned mtu; /* interface MTU value */
721 unsigned short type; /* interface hardware type */
722 unsigned short hard_header_len; /* hardware hdr length */
724 /* extra head- and tailroom the hardware may need, but not in all cases
725 * can this be guaranteed, especially tailroom. Some cases also use
726 * LL_MAX_HEADER instead to allocate the skb.
728 unsigned short needed_headroom;
729 unsigned short needed_tailroom;
731 struct net_device *master; /* Pointer to master device of a group,
732 * which this device is member of.
735 /* Interface address info. */
736 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
737 unsigned char addr_len; /* hardware address length */
738 unsigned short dev_id; /* for shared network cards */
740 spinlock_t addr_list_lock;
741 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
742 int uc_count; /* Number of installed ucasts */
744 struct dev_addr_list *mc_list; /* Multicast mac addresses */
745 int mc_count; /* Number of installed mcasts */
746 unsigned int promiscuity;
747 unsigned int allmulti;
750 /* Protocol specific pointers */
752 #ifdef CONFIG_NET_DSA
753 void *dsa_ptr; /* dsa specific data */
755 void *atalk_ptr; /* AppleTalk link */
756 void *ip_ptr; /* IPv4 specific data */
757 void *dn_ptr; /* DECnet specific data */
758 void *ip6_ptr; /* IPv6 specific data */
759 void *ec_ptr; /* Econet specific data */
760 void *ax25_ptr; /* AX.25 specific data */
761 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
762 assign before registering */
765 * Cache line mostly used on receive path (including eth_type_trans())
767 unsigned long last_rx; /* Time of last Rx */
768 /* Interface address info used in eth_type_trans() */
769 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
770 because most packets are unicast) */
772 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
774 struct netdev_queue rx_queue;
776 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
778 /* Number of TX queues allocated at alloc_netdev_mq() time */
779 unsigned int num_tx_queues;
781 /* Number of TX queues currently active in device */
782 unsigned int real_num_tx_queues;
784 unsigned long tx_queue_len; /* Max frames per queue allowed */
785 spinlock_t tx_global_lock;
787 * One part is mostly used on xmit path (device)
789 /* These may be needed for future network-power-down code. */
790 unsigned long trans_start; /* Time (in jiffies) of last Tx */
792 int watchdog_timeo; /* used by dev_watchdog() */
793 struct timer_list watchdog_timer;
795 /* Number of references to this device */
796 atomic_t refcnt ____cacheline_aligned_in_smp;
798 /* delayed register/unregister */
799 struct list_head todo_list;
800 /* device index hash chain */
801 struct hlist_node index_hlist;
803 struct net_device *link_watch_next;
805 /* register/unregister state machine */
806 enum { NETREG_UNINITIALIZED=0,
807 NETREG_REGISTERED, /* completed register_netdevice */
808 NETREG_UNREGISTERING, /* called unregister_netdevice */
809 NETREG_UNREGISTERED, /* completed unregister todo */
810 NETREG_RELEASED, /* called free_netdev */
813 /* Called from unregister, can be used to call free_netdev */
814 void (*destructor)(struct net_device *dev);
816 #ifdef CONFIG_NETPOLL
817 struct netpoll_info *npinfo;
821 /* Network namespace this network device is inside */
825 /* mid-layer private */
829 struct net_bridge_port *br_port;
831 struct macvlan_port *macvlan_port;
833 struct garp_port *garp_port;
835 /* class/net/name entry */
837 /* space for optional statistics and wireless sysfs groups */
838 struct attribute_group *sysfs_groups[3];
840 /* rtnetlink link ops */
841 const struct rtnl_link_ops *rtnl_link_ops;
843 /* VLAN feature mask */
844 unsigned long vlan_features;
846 /* for setting kernel sock attribute on TCP connection setup */
847 #define GSO_MAX_SIZE 65536
848 unsigned int gso_max_size;
851 /* Data Center Bridging netlink ops */
852 struct dcbnl_rtnl_ops *dcbnl_ops;
855 #ifdef CONFIG_COMPAT_NET_DEV_OPS
857 int (*init)(struct net_device *dev);
858 void (*uninit)(struct net_device *dev);
859 int (*open)(struct net_device *dev);
860 int (*stop)(struct net_device *dev);
861 int (*hard_start_xmit) (struct sk_buff *skb,
862 struct net_device *dev);
863 u16 (*select_queue)(struct net_device *dev,
864 struct sk_buff *skb);
865 void (*change_rx_flags)(struct net_device *dev,
867 void (*set_rx_mode)(struct net_device *dev);
868 void (*set_multicast_list)(struct net_device *dev);
869 int (*set_mac_address)(struct net_device *dev,
871 int (*validate_addr)(struct net_device *dev);
872 int (*do_ioctl)(struct net_device *dev,
873 struct ifreq *ifr, int cmd);
874 int (*set_config)(struct net_device *dev,
876 int (*change_mtu)(struct net_device *dev, int new_mtu);
877 int (*neigh_setup)(struct net_device *dev,
878 struct neigh_parms *);
879 void (*tx_timeout) (struct net_device *dev);
880 struct net_device_stats* (*get_stats)(struct net_device *dev);
881 void (*vlan_rx_register)(struct net_device *dev,
882 struct vlan_group *grp);
883 void (*vlan_rx_add_vid)(struct net_device *dev,
885 void (*vlan_rx_kill_vid)(struct net_device *dev,
887 #ifdef CONFIG_NET_POLL_CONTROLLER
888 void (*poll_controller)(struct net_device *dev);
893 #define to_net_dev(d) container_of(d, struct net_device, dev)
895 #define NETDEV_ALIGN 32
896 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
899 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
902 return &dev->_tx[index];
905 static inline void netdev_for_each_tx_queue(struct net_device *dev,
906 void (*f)(struct net_device *,
907 struct netdev_queue *,
913 for (i = 0; i < dev->num_tx_queues; i++)
914 f(dev, &dev->_tx[i], arg);
918 * Net namespace inlines
921 struct net *dev_net(const struct net_device *dev)
931 void dev_net_set(struct net_device *dev, struct net *net)
934 release_net(dev->nd_net);
935 dev->nd_net = hold_net(net);
939 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
941 #ifdef CONFIG_NET_DSA_TAG_DSA
942 if (dev->dsa_ptr != NULL)
943 return dsa_uses_dsa_tags(dev->dsa_ptr);
949 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
951 #ifdef CONFIG_NET_DSA_TAG_TRAILER
952 if (dev->dsa_ptr != NULL)
953 return dsa_uses_trailer_tags(dev->dsa_ptr);
960 * netdev_priv - access network device private data
961 * @dev: network device
963 * Get network device private data
965 static inline void *netdev_priv(const struct net_device *dev)
967 return (char *)dev + ((sizeof(struct net_device)
968 + NETDEV_ALIGN_CONST)
969 & ~NETDEV_ALIGN_CONST);
972 /* Set the sysfs physical device reference for the network logical device
973 * if set prior to registration will cause a symlink during initialization.
975 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
978 * netif_napi_add - initialize a napi context
979 * @dev: network device
980 * @napi: napi context
981 * @poll: polling function
982 * @weight: default weight
984 * netif_napi_add() must be used to initialize a napi context prior to calling
985 * *any* of the other napi related functions.
987 static inline void netif_napi_add(struct net_device *dev,
988 struct napi_struct *napi,
989 int (*poll)(struct napi_struct *, int),
992 INIT_LIST_HEAD(&napi->poll_list);
994 napi->weight = weight;
995 #ifdef CONFIG_NETPOLL
997 list_add(&napi->dev_list, &dev->napi_list);
998 spin_lock_init(&napi->poll_lock);
999 napi->poll_owner = -1;
1001 set_bit(NAPI_STATE_SCHED, &napi->state);
1005 * netif_napi_del - remove a napi context
1006 * @napi: napi context
1008 * netif_napi_del() removes a napi context from the network device napi list
1010 static inline void netif_napi_del(struct napi_struct *napi)
1012 #ifdef CONFIG_NETPOLL
1013 list_del(&napi->dev_list);
1017 struct packet_type {
1018 __be16 type; /* This is really htons(ether_type). */
1019 struct net_device *dev; /* NULL is wildcarded here */
1020 int (*func) (struct sk_buff *,
1021 struct net_device *,
1022 struct packet_type *,
1023 struct net_device *);
1024 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1026 int (*gso_send_check)(struct sk_buff *skb);
1027 void *af_packet_priv;
1028 struct list_head list;
1031 #include <linux/interrupt.h>
1032 #include <linux/notifier.h>
1034 extern rwlock_t dev_base_lock; /* Device list lock */
1037 #define for_each_netdev(net, d) \
1038 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1039 #define for_each_netdev_safe(net, d, n) \
1040 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1041 #define for_each_netdev_continue(net, d) \
1042 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1043 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1045 static inline struct net_device *next_net_device(struct net_device *dev)
1047 struct list_head *lh;
1051 lh = dev->dev_list.next;
1052 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1055 static inline struct net_device *first_net_device(struct net *net)
1057 return list_empty(&net->dev_base_head) ? NULL :
1058 net_device_entry(net->dev_base_head.next);
1061 extern int netdev_boot_setup_check(struct net_device *dev);
1062 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1063 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1064 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1065 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1066 extern void dev_add_pack(struct packet_type *pt);
1067 extern void dev_remove_pack(struct packet_type *pt);
1068 extern void __dev_remove_pack(struct packet_type *pt);
1070 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1071 unsigned short mask);
1072 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1073 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1074 extern int dev_alloc_name(struct net_device *dev, const char *name);
1075 extern int dev_open(struct net_device *dev);
1076 extern int dev_close(struct net_device *dev);
1077 extern void dev_disable_lro(struct net_device *dev);
1078 extern int dev_queue_xmit(struct sk_buff *skb);
1079 extern int register_netdevice(struct net_device *dev);
1080 extern void unregister_netdevice(struct net_device *dev);
1081 extern void free_netdev(struct net_device *dev);
1082 extern void synchronize_net(void);
1083 extern int register_netdevice_notifier(struct notifier_block *nb);
1084 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1085 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1086 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1087 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1088 extern int dev_restart(struct net_device *dev);
1089 #ifdef CONFIG_NETPOLL_TRAP
1090 extern int netpoll_trap(void);
1093 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1094 unsigned short type,
1095 const void *daddr, const void *saddr,
1098 if (!dev->header_ops || !dev->header_ops->create)
1101 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1104 static inline int dev_parse_header(const struct sk_buff *skb,
1105 unsigned char *haddr)
1107 const struct net_device *dev = skb->dev;
1109 if (!dev->header_ops || !dev->header_ops->parse)
1111 return dev->header_ops->parse(skb, haddr);
1114 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1115 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1116 static inline int unregister_gifconf(unsigned int family)
1118 return register_gifconf(family, NULL);
1122 * Incoming packets are placed on per-cpu queues so that
1123 * no locking is needed.
1127 struct Qdisc *output_queue;
1128 struct sk_buff_head input_pkt_queue;
1129 struct list_head poll_list;
1130 struct sk_buff *completion_queue;
1132 struct napi_struct backlog;
1133 #ifdef CONFIG_NET_DMA
1134 struct dma_chan *net_dma;
1138 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1140 #define HAVE_NETIF_QUEUE
1142 extern void __netif_schedule(struct Qdisc *q);
1144 static inline void netif_schedule_queue(struct netdev_queue *txq)
1146 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1147 __netif_schedule(txq->qdisc);
1150 static inline void netif_tx_schedule_all(struct net_device *dev)
1154 for (i = 0; i < dev->num_tx_queues; i++)
1155 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1158 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1160 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1164 * netif_start_queue - allow transmit
1165 * @dev: network device
1167 * Allow upper layers to call the device hard_start_xmit routine.
1169 static inline void netif_start_queue(struct net_device *dev)
1171 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1174 static inline void netif_tx_start_all_queues(struct net_device *dev)
1178 for (i = 0; i < dev->num_tx_queues; i++) {
1179 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1180 netif_tx_start_queue(txq);
1184 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1186 #ifdef CONFIG_NETPOLL_TRAP
1187 if (netpoll_trap()) {
1188 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1192 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1193 __netif_schedule(dev_queue->qdisc);
1197 * netif_wake_queue - restart transmit
1198 * @dev: network device
1200 * Allow upper layers to call the device hard_start_xmit routine.
1201 * Used for flow control when transmit resources are available.
1203 static inline void netif_wake_queue(struct net_device *dev)
1205 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1208 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1212 for (i = 0; i < dev->num_tx_queues; i++) {
1213 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1214 netif_tx_wake_queue(txq);
1218 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1220 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1224 * netif_stop_queue - stop transmitted packets
1225 * @dev: network device
1227 * Stop upper layers calling the device hard_start_xmit routine.
1228 * Used for flow control when transmit resources are unavailable.
1230 static inline void netif_stop_queue(struct net_device *dev)
1232 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1235 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1239 for (i = 0; i < dev->num_tx_queues; i++) {
1240 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1241 netif_tx_stop_queue(txq);
1245 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1247 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1251 * netif_queue_stopped - test if transmit queue is flowblocked
1252 * @dev: network device
1254 * Test if transmit queue on device is currently unable to send.
1256 static inline int netif_queue_stopped(const struct net_device *dev)
1258 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1261 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1263 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1267 * netif_running - test if up
1268 * @dev: network device
1270 * Test if the device has been brought up.
1272 static inline int netif_running(const struct net_device *dev)
1274 return test_bit(__LINK_STATE_START, &dev->state);
1278 * Routines to manage the subqueues on a device. We only need start
1279 * stop, and a check if it's stopped. All other device management is
1280 * done at the overall netdevice level.
1281 * Also test the device if we're multiqueue.
1285 * netif_start_subqueue - allow sending packets on subqueue
1286 * @dev: network device
1287 * @queue_index: sub queue index
1289 * Start individual transmit queue of a device with multiple transmit queues.
1291 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1293 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1294 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1298 * netif_stop_subqueue - stop sending packets on subqueue
1299 * @dev: network device
1300 * @queue_index: sub queue index
1302 * Stop individual transmit queue of a device with multiple transmit queues.
1304 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1306 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1307 #ifdef CONFIG_NETPOLL_TRAP
1311 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1315 * netif_subqueue_stopped - test status of subqueue
1316 * @dev: network device
1317 * @queue_index: sub queue index
1319 * Check individual transmit queue of a device with multiple transmit queues.
1321 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1324 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1325 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1328 static inline int netif_subqueue_stopped(const struct net_device *dev,
1329 struct sk_buff *skb)
1331 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1335 * netif_wake_subqueue - allow sending packets on subqueue
1336 * @dev: network device
1337 * @queue_index: sub queue index
1339 * Resume individual transmit queue of a device with multiple transmit queues.
1341 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1343 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1344 #ifdef CONFIG_NETPOLL_TRAP
1348 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1349 __netif_schedule(txq->qdisc);
1353 * netif_is_multiqueue - test if device has multiple transmit queues
1354 * @dev: network device
1356 * Check if device has multiple transmit queues
1358 static inline int netif_is_multiqueue(const struct net_device *dev)
1360 return (dev->num_tx_queues > 1);
1363 /* Use this variant when it is known for sure that it
1364 * is executing from hardware interrupt context or with hardware interrupts
1367 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1369 /* Use this variant in places where it could be invoked
1370 * from either hardware interrupt or other context, with hardware interrupts
1371 * either disabled or enabled.
1373 extern void dev_kfree_skb_any(struct sk_buff *skb);
1375 #define HAVE_NETIF_RX 1
1376 extern int netif_rx(struct sk_buff *skb);
1377 extern int netif_rx_ni(struct sk_buff *skb);
1378 #define HAVE_NETIF_RECEIVE_SKB 1
1379 extern int netif_receive_skb(struct sk_buff *skb);
1380 extern void netif_nit_deliver(struct sk_buff *skb);
1381 extern int dev_valid_name(const char *name);
1382 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1383 extern int dev_ethtool(struct net *net, struct ifreq *);
1384 extern unsigned dev_get_flags(const struct net_device *);
1385 extern int dev_change_flags(struct net_device *, unsigned);
1386 extern int dev_change_name(struct net_device *, const char *);
1387 extern int dev_set_alias(struct net_device *, const char *, size_t);
1388 extern int dev_change_net_namespace(struct net_device *,
1389 struct net *, const char *);
1390 extern int dev_set_mtu(struct net_device *, int);
1391 extern int dev_set_mac_address(struct net_device *,
1393 extern int dev_hard_start_xmit(struct sk_buff *skb,
1394 struct net_device *dev,
1395 struct netdev_queue *txq);
1397 extern int netdev_budget;
1399 /* Called by rtnetlink.c:rtnl_unlock() */
1400 extern void netdev_run_todo(void);
1403 * dev_put - release reference to device
1404 * @dev: network device
1406 * Release reference to device to allow it to be freed.
1408 static inline void dev_put(struct net_device *dev)
1410 atomic_dec(&dev->refcnt);
1414 * dev_hold - get reference to device
1415 * @dev: network device
1417 * Hold reference to device to keep it from being freed.
1419 static inline void dev_hold(struct net_device *dev)
1421 atomic_inc(&dev->refcnt);
1424 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1425 * and _off may be called from IRQ context, but it is caller
1426 * who is responsible for serialization of these calls.
1428 * The name carrier is inappropriate, these functions should really be
1429 * called netif_lowerlayer_*() because they represent the state of any
1430 * kind of lower layer not just hardware media.
1433 extern void linkwatch_fire_event(struct net_device *dev);
1436 * netif_carrier_ok - test if carrier present
1437 * @dev: network device
1439 * Check if carrier is present on device
1441 static inline int netif_carrier_ok(const struct net_device *dev)
1443 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1446 extern void __netdev_watchdog_up(struct net_device *dev);
1448 extern void netif_carrier_on(struct net_device *dev);
1450 extern void netif_carrier_off(struct net_device *dev);
1453 * netif_dormant_on - mark device as dormant.
1454 * @dev: network device
1456 * Mark device as dormant (as per RFC2863).
1458 * The dormant state indicates that the relevant interface is not
1459 * actually in a condition to pass packets (i.e., it is not 'up') but is
1460 * in a "pending" state, waiting for some external event. For "on-
1461 * demand" interfaces, this new state identifies the situation where the
1462 * interface is waiting for events to place it in the up state.
1465 static inline void netif_dormant_on(struct net_device *dev)
1467 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1468 linkwatch_fire_event(dev);
1472 * netif_dormant_off - set device as not dormant.
1473 * @dev: network device
1475 * Device is not in dormant state.
1477 static inline void netif_dormant_off(struct net_device *dev)
1479 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1480 linkwatch_fire_event(dev);
1484 * netif_dormant - test if carrier present
1485 * @dev: network device
1487 * Check if carrier is present on device
1489 static inline int netif_dormant(const struct net_device *dev)
1491 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1496 * netif_oper_up - test if device is operational
1497 * @dev: network device
1499 * Check if carrier is operational
1501 static inline int netif_oper_up(const struct net_device *dev) {
1502 return (dev->operstate == IF_OPER_UP ||
1503 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1507 * netif_device_present - is device available or removed
1508 * @dev: network device
1510 * Check if device has not been removed from system.
1512 static inline int netif_device_present(struct net_device *dev)
1514 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1517 extern void netif_device_detach(struct net_device *dev);
1519 extern void netif_device_attach(struct net_device *dev);
1522 * Network interface message level settings
1524 #define HAVE_NETIF_MSG 1
1527 NETIF_MSG_DRV = 0x0001,
1528 NETIF_MSG_PROBE = 0x0002,
1529 NETIF_MSG_LINK = 0x0004,
1530 NETIF_MSG_TIMER = 0x0008,
1531 NETIF_MSG_IFDOWN = 0x0010,
1532 NETIF_MSG_IFUP = 0x0020,
1533 NETIF_MSG_RX_ERR = 0x0040,
1534 NETIF_MSG_TX_ERR = 0x0080,
1535 NETIF_MSG_TX_QUEUED = 0x0100,
1536 NETIF_MSG_INTR = 0x0200,
1537 NETIF_MSG_TX_DONE = 0x0400,
1538 NETIF_MSG_RX_STATUS = 0x0800,
1539 NETIF_MSG_PKTDATA = 0x1000,
1540 NETIF_MSG_HW = 0x2000,
1541 NETIF_MSG_WOL = 0x4000,
1544 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1545 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1546 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1547 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1548 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1549 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1550 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1551 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1552 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1553 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1554 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1555 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1556 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1557 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1558 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1560 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1563 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1564 return default_msg_enable_bits;
1565 if (debug_value == 0) /* no output */
1567 /* set low N bits */
1568 return (1 << debug_value) - 1;
1571 /* Test if receive needs to be scheduled but only if up */
1572 static inline int netif_rx_schedule_prep(struct net_device *dev,
1573 struct napi_struct *napi)
1575 return napi_schedule_prep(napi);
1578 /* Add interface to tail of rx poll list. This assumes that _prep has
1579 * already been called and returned 1.
1581 static inline void __netif_rx_schedule(struct net_device *dev,
1582 struct napi_struct *napi)
1584 __napi_schedule(napi);
1587 /* Try to reschedule poll. Called by irq handler. */
1589 static inline void netif_rx_schedule(struct net_device *dev,
1590 struct napi_struct *napi)
1592 if (netif_rx_schedule_prep(dev, napi))
1593 __netif_rx_schedule(dev, napi);
1596 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1597 static inline int netif_rx_reschedule(struct net_device *dev,
1598 struct napi_struct *napi)
1600 if (napi_schedule_prep(napi)) {
1601 __netif_rx_schedule(dev, napi);
1607 /* same as netif_rx_complete, except that local_irq_save(flags)
1608 * has already been issued
1610 static inline void __netif_rx_complete(struct net_device *dev,
1611 struct napi_struct *napi)
1613 __napi_complete(napi);
1616 /* Remove interface from poll list: it must be in the poll list
1617 * on current cpu. This primitive is called by dev->poll(), when
1618 * it completes the work. The device cannot be out of poll list at this
1619 * moment, it is BUG().
1621 static inline void netif_rx_complete(struct net_device *dev,
1622 struct napi_struct *napi)
1624 unsigned long flags;
1627 * don't let napi dequeue from the cpu poll list
1628 * just in case its running on a different cpu
1630 if (unlikely(test_bit(NAPI_STATE_NPSVC, &napi->state)))
1632 local_irq_save(flags);
1633 __netif_rx_complete(dev, napi);
1634 local_irq_restore(flags);
1637 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1639 spin_lock(&txq->_xmit_lock);
1640 txq->xmit_lock_owner = cpu;
1643 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1645 spin_lock_bh(&txq->_xmit_lock);
1646 txq->xmit_lock_owner = smp_processor_id();
1649 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1651 int ok = spin_trylock(&txq->_xmit_lock);
1653 txq->xmit_lock_owner = smp_processor_id();
1657 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1659 txq->xmit_lock_owner = -1;
1660 spin_unlock(&txq->_xmit_lock);
1663 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1665 txq->xmit_lock_owner = -1;
1666 spin_unlock_bh(&txq->_xmit_lock);
1670 * netif_tx_lock - grab network device transmit lock
1671 * @dev: network device
1673 * Get network device transmit lock
1675 static inline void netif_tx_lock(struct net_device *dev)
1680 spin_lock(&dev->tx_global_lock);
1681 cpu = smp_processor_id();
1682 for (i = 0; i < dev->num_tx_queues; i++) {
1683 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1685 /* We are the only thread of execution doing a
1686 * freeze, but we have to grab the _xmit_lock in
1687 * order to synchronize with threads which are in
1688 * the ->hard_start_xmit() handler and already
1689 * checked the frozen bit.
1691 __netif_tx_lock(txq, cpu);
1692 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1693 __netif_tx_unlock(txq);
1697 static inline void netif_tx_lock_bh(struct net_device *dev)
1703 static inline void netif_tx_unlock(struct net_device *dev)
1707 for (i = 0; i < dev->num_tx_queues; i++) {
1708 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1710 /* No need to grab the _xmit_lock here. If the
1711 * queue is not stopped for another reason, we
1714 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1715 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1716 __netif_schedule(txq->qdisc);
1718 spin_unlock(&dev->tx_global_lock);
1721 static inline void netif_tx_unlock_bh(struct net_device *dev)
1723 netif_tx_unlock(dev);
1727 #define HARD_TX_LOCK(dev, txq, cpu) { \
1728 if ((dev->features & NETIF_F_LLTX) == 0) { \
1729 __netif_tx_lock(txq, cpu); \
1733 #define HARD_TX_UNLOCK(dev, txq) { \
1734 if ((dev->features & NETIF_F_LLTX) == 0) { \
1735 __netif_tx_unlock(txq); \
1739 static inline void netif_tx_disable(struct net_device *dev)
1745 cpu = smp_processor_id();
1746 for (i = 0; i < dev->num_tx_queues; i++) {
1747 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1749 __netif_tx_lock(txq, cpu);
1750 netif_tx_stop_queue(txq);
1751 __netif_tx_unlock(txq);
1756 static inline void netif_addr_lock(struct net_device *dev)
1758 spin_lock(&dev->addr_list_lock);
1761 static inline void netif_addr_lock_bh(struct net_device *dev)
1763 spin_lock_bh(&dev->addr_list_lock);
1766 static inline void netif_addr_unlock(struct net_device *dev)
1768 spin_unlock(&dev->addr_list_lock);
1771 static inline void netif_addr_unlock_bh(struct net_device *dev)
1773 spin_unlock_bh(&dev->addr_list_lock);
1776 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1778 extern void ether_setup(struct net_device *dev);
1780 /* Support for loadable net-drivers */
1781 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1782 void (*setup)(struct net_device *),
1783 unsigned int queue_count);
1784 #define alloc_netdev(sizeof_priv, name, setup) \
1785 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1786 extern int register_netdev(struct net_device *dev);
1787 extern void unregister_netdev(struct net_device *dev);
1788 /* Functions used for secondary unicast and multicast support */
1789 extern void dev_set_rx_mode(struct net_device *dev);
1790 extern void __dev_set_rx_mode(struct net_device *dev);
1791 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1792 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1793 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1794 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1795 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1796 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1797 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1798 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1799 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1800 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1801 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1802 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1803 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1804 extern int dev_set_allmulti(struct net_device *dev, int inc);
1805 extern void netdev_state_change(struct net_device *dev);
1806 extern void netdev_bonding_change(struct net_device *dev);
1807 extern void netdev_features_change(struct net_device *dev);
1808 /* Load a device via the kmod */
1809 extern void dev_load(struct net *net, const char *name);
1810 extern void dev_mcast_init(void);
1811 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1813 extern int netdev_max_backlog;
1814 extern int weight_p;
1815 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1816 extern int skb_checksum_help(struct sk_buff *skb);
1817 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1819 extern void netdev_rx_csum_fault(struct net_device *dev);
1821 static inline void netdev_rx_csum_fault(struct net_device *dev)
1825 /* rx skb timestamps */
1826 extern void net_enable_timestamp(void);
1827 extern void net_disable_timestamp(void);
1829 #ifdef CONFIG_PROC_FS
1830 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1831 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1832 extern void dev_seq_stop(struct seq_file *seq, void *v);
1835 extern int netdev_class_create_file(struct class_attribute *class_attr);
1836 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1838 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1840 extern void linkwatch_run_queue(void);
1842 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1843 unsigned long mask);
1844 unsigned long netdev_fix_features(unsigned long features, const char *name);
1846 static inline int net_gso_ok(int features, int gso_type)
1848 int feature = gso_type << NETIF_F_GSO_SHIFT;
1849 return (features & feature) == feature;
1852 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1854 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1857 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1859 return skb_is_gso(skb) &&
1860 (!skb_gso_ok(skb, dev->features) ||
1861 (skb_shinfo(skb)->frag_list &&
1862 !(dev->features & NETIF_F_FRAGLIST)) ||
1863 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1866 static inline void netif_set_gso_max_size(struct net_device *dev,
1869 dev->gso_max_size = size;
1872 /* On bonding slaves other than the currently active slave, suppress
1873 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1874 * ARP on active-backup slaves with arp_validate enabled.
1876 static inline int skb_bond_should_drop(struct sk_buff *skb)
1878 struct net_device *dev = skb->dev;
1879 struct net_device *master = dev->master;
1882 if (master->priv_flags & IFF_MASTER_ARPMON)
1883 dev->last_rx = jiffies;
1885 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1886 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1887 skb->protocol == __constant_htons(ETH_P_ARP))
1890 if (master->priv_flags & IFF_MASTER_ALB) {
1891 if (skb->pkt_type != PACKET_BROADCAST &&
1892 skb->pkt_type != PACKET_MULTICAST)
1895 if (master->priv_flags & IFF_MASTER_8023AD &&
1896 skb->protocol == __constant_htons(ETH_P_SLOW))
1905 extern struct pernet_operations __net_initdata loopback_net_ops;
1906 #endif /* __KERNEL__ */
1908 #endif /* _LINUX_DEV_H */