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;
318 struct list_head dev_list;
319 struct sk_buff *gro_list;
324 NAPI_STATE_SCHED, /* Poll is scheduled */
325 NAPI_STATE_DISABLE, /* Disable pending */
326 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
329 extern void __napi_schedule(struct napi_struct *n);
331 static inline int napi_disable_pending(struct napi_struct *n)
333 return test_bit(NAPI_STATE_DISABLE, &n->state);
337 * napi_schedule_prep - check if napi can be scheduled
340 * Test if NAPI routine is already running, and if not mark
341 * it as running. This is used as a condition variable
342 * insure only one NAPI poll instance runs. We also make
343 * sure there is no pending NAPI disable.
345 static inline int napi_schedule_prep(struct napi_struct *n)
347 return !napi_disable_pending(n) &&
348 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
352 * napi_schedule - schedule NAPI poll
355 * Schedule NAPI poll routine to be called if it is not already
358 static inline void napi_schedule(struct napi_struct *n)
360 if (napi_schedule_prep(n))
364 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
365 static inline int napi_reschedule(struct napi_struct *napi)
367 if (napi_schedule_prep(napi)) {
368 __napi_schedule(napi);
375 * napi_complete - NAPI processing complete
378 * Mark NAPI processing as complete.
380 extern void __napi_complete(struct napi_struct *n);
381 extern void napi_complete(struct napi_struct *n);
384 * napi_disable - prevent NAPI from scheduling
387 * Stop NAPI from being scheduled on this context.
388 * Waits till any outstanding processing completes.
390 static inline void napi_disable(struct napi_struct *n)
392 set_bit(NAPI_STATE_DISABLE, &n->state);
393 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
395 clear_bit(NAPI_STATE_DISABLE, &n->state);
399 * napi_enable - enable NAPI scheduling
402 * Resume NAPI from being scheduled on this context.
403 * Must be paired with napi_disable.
405 static inline void napi_enable(struct napi_struct *n)
407 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
408 smp_mb__before_clear_bit();
409 clear_bit(NAPI_STATE_SCHED, &n->state);
414 * napi_synchronize - wait until NAPI is not running
417 * Wait until NAPI is done being scheduled on this context.
418 * Waits till any outstanding processing completes but
419 * does not disable future activations.
421 static inline void napi_synchronize(const struct napi_struct *n)
423 while (test_bit(NAPI_STATE_SCHED, &n->state))
427 # define napi_synchronize(n) barrier()
430 enum netdev_queue_state_t
433 __QUEUE_STATE_FROZEN,
436 struct netdev_queue {
437 struct net_device *dev;
440 spinlock_t _xmit_lock;
442 struct Qdisc *qdisc_sleeping;
443 } ____cacheline_aligned_in_smp;
447 * This structure defines the management hooks for network devices.
448 * The following hooks can be defined; unless noted otherwise, they are
449 * optional and can be filled with a null pointer.
451 * int (*ndo_init)(struct net_device *dev);
452 * This function is called once when network device is registered.
453 * The network device can use this to any late stage initializaton
454 * or semantic validattion. It can fail with an error code which will
455 * be propogated back to register_netdev
457 * void (*ndo_uninit)(struct net_device *dev);
458 * This function is called when device is unregistered or when registration
459 * fails. It is not called if init fails.
461 * int (*ndo_open)(struct net_device *dev);
462 * This function is called when network device transistions to the up
465 * int (*ndo_stop)(struct net_device *dev);
466 * This function is called when network device transistions to the down
469 * int (*ndo_hard_start_xmit)(struct sk_buff *skb, struct net_device *dev);
470 * Called when a packet needs to be transmitted.
471 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
472 * Required can not be NULL.
474 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
475 * Called to decide which queue to when device supports multiple
478 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
479 * This function is called to allow device receiver to make
480 * changes to configuration when multicast or promiscious is enabled.
482 * void (*ndo_set_rx_mode)(struct net_device *dev);
483 * This function is called device changes address list filtering.
485 * void (*ndo_set_multicast_list)(struct net_device *dev);
486 * This function is called when the multicast address list changes.
488 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
489 * This function is called when the Media Access Control address
490 * needs to be changed. If not this interface is not defined, the
491 * mac address can not be changed.
493 * int (*ndo_validate_addr)(struct net_device *dev);
494 * Test if Media Access Control address is valid for the device.
496 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
497 * Called when a user request an ioctl which can't be handled by
498 * the generic interface code. If not defined ioctl's return
499 * not supported error code.
501 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
502 * Used to set network devices bus interface parameters. This interface
503 * is retained for legacy reason, new devices should use the bus
504 * interface (PCI) for low level management.
506 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
507 * Called when a user wants to change the Maximum Transfer Unit
508 * of a device. If not defined, any request to change MTU will
509 * will return an error.
511 * void (*ndo_tx_timeout)(struct net_device *dev);
512 * Callback uses when the transmitter has not made any progress
513 * for dev->watchdog ticks.
515 * struct net_device_stats* (*get_stats)(struct net_device *dev);
516 * Called when a user wants to get the network device usage
517 * statistics. If not defined, the counters in dev->stats will
520 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
521 * If device support VLAN receive accleration
522 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
523 * when vlan groups for the device changes. Note: grp is NULL
524 * if no vlan's groups are being used.
526 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
527 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
528 * this function is called when a VLAN id is registered.
530 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
531 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
532 * this function is called when a VLAN id is unregistered.
534 * void (*ndo_poll_controller)(struct net_device *dev);
536 #define HAVE_NET_DEVICE_OPS
537 struct net_device_ops {
538 int (*ndo_init)(struct net_device *dev);
539 void (*ndo_uninit)(struct net_device *dev);
540 int (*ndo_open)(struct net_device *dev);
541 int (*ndo_stop)(struct net_device *dev);
542 int (*ndo_start_xmit) (struct sk_buff *skb,
543 struct net_device *dev);
544 u16 (*ndo_select_queue)(struct net_device *dev,
545 struct sk_buff *skb);
546 #define HAVE_CHANGE_RX_FLAGS
547 void (*ndo_change_rx_flags)(struct net_device *dev,
549 #define HAVE_SET_RX_MODE
550 void (*ndo_set_rx_mode)(struct net_device *dev);
551 #define HAVE_MULTICAST
552 void (*ndo_set_multicast_list)(struct net_device *dev);
553 #define HAVE_SET_MAC_ADDR
554 int (*ndo_set_mac_address)(struct net_device *dev,
556 #define HAVE_VALIDATE_ADDR
557 int (*ndo_validate_addr)(struct net_device *dev);
558 #define HAVE_PRIVATE_IOCTL
559 int (*ndo_do_ioctl)(struct net_device *dev,
560 struct ifreq *ifr, int cmd);
561 #define HAVE_SET_CONFIG
562 int (*ndo_set_config)(struct net_device *dev,
564 #define HAVE_CHANGE_MTU
565 int (*ndo_change_mtu)(struct net_device *dev,
567 int (*ndo_neigh_setup)(struct net_device *dev,
568 struct neigh_parms *);
569 #define HAVE_TX_TIMEOUT
570 void (*ndo_tx_timeout) (struct net_device *dev);
572 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
574 void (*ndo_vlan_rx_register)(struct net_device *dev,
575 struct vlan_group *grp);
576 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
578 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
580 #ifdef CONFIG_NET_POLL_CONTROLLER
581 #define HAVE_NETDEV_POLL
582 void (*ndo_poll_controller)(struct net_device *dev);
587 * The DEVICE structure.
588 * Actually, this whole structure is a big mistake. It mixes I/O
589 * data with strictly "high-level" data, and it has to know about
590 * almost every data structure used in the INET module.
592 * FIXME: cleanup struct net_device such that network protocol info
600 * This is the first field of the "visible" part of this structure
601 * (i.e. as seen by users in the "Space.c" file). It is the name
605 /* device name hash chain */
606 struct hlist_node name_hlist;
611 * I/O specific fields
612 * FIXME: Merge these and struct ifmap into one
614 unsigned long mem_end; /* shared mem end */
615 unsigned long mem_start; /* shared mem start */
616 unsigned long base_addr; /* device I/O address */
617 unsigned int irq; /* device IRQ number */
620 * Some hardware also needs these fields, but they are not
621 * part of the usual set specified in Space.c.
624 unsigned char if_port; /* Selectable AUI, TP,..*/
625 unsigned char dma; /* DMA channel */
629 struct list_head dev_list;
630 struct list_head napi_list;
632 /* Net device features */
633 unsigned long features;
634 #define NETIF_F_SG 1 /* Scatter/gather IO. */
635 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
636 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
637 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
638 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
639 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
640 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
641 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
642 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
643 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
644 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
645 #define NETIF_F_GSO 2048 /* Enable software GSO. */
646 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
647 /* do not use LLTX in new drivers */
648 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
649 #define NETIF_F_GRO 16384 /* Generic receive offload */
650 #define NETIF_F_LRO 32768 /* large receive offload */
652 /* Segmentation offload features */
653 #define NETIF_F_GSO_SHIFT 16
654 #define NETIF_F_GSO_MASK 0xffff0000
655 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
656 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
657 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
658 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
659 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
661 /* List of features with software fallbacks. */
662 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
665 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
666 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
667 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
668 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
671 * If one device supports one of these features, then enable them
672 * for all in netdev_increment_features.
674 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
675 NETIF_F_SG | NETIF_F_HIGHDMA | \
678 /* Interface index. Unique device identifier */
682 struct net_device_stats stats;
684 #ifdef CONFIG_WIRELESS_EXT
685 /* List of functions to handle Wireless Extensions (instead of ioctl).
686 * See <net/iw_handler.h> for details. Jean II */
687 const struct iw_handler_def * wireless_handlers;
688 /* Instance data managed by the core of Wireless Extensions. */
689 struct iw_public_data * wireless_data;
691 /* Management operations */
692 const struct net_device_ops *netdev_ops;
693 const struct ethtool_ops *ethtool_ops;
695 /* Hardware header description */
696 const struct header_ops *header_ops;
698 unsigned int flags; /* interface flags (a la BSD) */
699 unsigned short gflags;
700 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
701 unsigned short padded; /* How much padding added by alloc_netdev() */
703 unsigned char operstate; /* RFC2863 operstate */
704 unsigned char link_mode; /* mapping policy to operstate */
706 unsigned mtu; /* interface MTU value */
707 unsigned short type; /* interface hardware type */
708 unsigned short hard_header_len; /* hardware hdr length */
710 /* extra head- and tailroom the hardware may need, but not in all cases
711 * can this be guaranteed, especially tailroom. Some cases also use
712 * LL_MAX_HEADER instead to allocate the skb.
714 unsigned short needed_headroom;
715 unsigned short needed_tailroom;
717 struct net_device *master; /* Pointer to master device of a group,
718 * which this device is member of.
721 /* Interface address info. */
722 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
723 unsigned char addr_len; /* hardware address length */
724 unsigned short dev_id; /* for shared network cards */
726 spinlock_t addr_list_lock;
727 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
728 int uc_count; /* Number of installed ucasts */
730 struct dev_addr_list *mc_list; /* Multicast mac addresses */
731 int mc_count; /* Number of installed mcasts */
732 unsigned int promiscuity;
733 unsigned int allmulti;
736 /* Protocol specific pointers */
738 #ifdef CONFIG_NET_DSA
739 void *dsa_ptr; /* dsa specific data */
741 void *atalk_ptr; /* AppleTalk link */
742 void *ip_ptr; /* IPv4 specific data */
743 void *dn_ptr; /* DECnet specific data */
744 void *ip6_ptr; /* IPv6 specific data */
745 void *ec_ptr; /* Econet specific data */
746 void *ax25_ptr; /* AX.25 specific data */
747 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
748 assign before registering */
751 * Cache line mostly used on receive path (including eth_type_trans())
753 unsigned long last_rx; /* Time of last Rx */
754 /* Interface address info used in eth_type_trans() */
755 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
756 because most packets are unicast) */
758 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
760 struct netdev_queue rx_queue;
762 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
764 /* Number of TX queues allocated at alloc_netdev_mq() time */
765 unsigned int num_tx_queues;
767 /* Number of TX queues currently active in device */
768 unsigned int real_num_tx_queues;
770 unsigned long tx_queue_len; /* Max frames per queue allowed */
771 spinlock_t tx_global_lock;
773 * One part is mostly used on xmit path (device)
775 /* These may be needed for future network-power-down code. */
776 unsigned long trans_start; /* Time (in jiffies) of last Tx */
778 int watchdog_timeo; /* used by dev_watchdog() */
779 struct timer_list watchdog_timer;
781 /* Number of references to this device */
782 atomic_t refcnt ____cacheline_aligned_in_smp;
784 /* delayed register/unregister */
785 struct list_head todo_list;
786 /* device index hash chain */
787 struct hlist_node index_hlist;
789 struct net_device *link_watch_next;
791 /* register/unregister state machine */
792 enum { NETREG_UNINITIALIZED=0,
793 NETREG_REGISTERED, /* completed register_netdevice */
794 NETREG_UNREGISTERING, /* called unregister_netdevice */
795 NETREG_UNREGISTERED, /* completed unregister todo */
796 NETREG_RELEASED, /* called free_netdev */
799 /* Called from unregister, can be used to call free_netdev */
800 void (*destructor)(struct net_device *dev);
802 #ifdef CONFIG_NETPOLL
803 struct netpoll_info *npinfo;
807 /* Network namespace this network device is inside */
811 /* mid-layer private */
815 struct net_bridge_port *br_port;
817 struct macvlan_port *macvlan_port;
819 struct garp_port *garp_port;
821 /* class/net/name entry */
823 /* space for optional statistics and wireless sysfs groups */
824 struct attribute_group *sysfs_groups[3];
826 /* rtnetlink link ops */
827 const struct rtnl_link_ops *rtnl_link_ops;
829 /* VLAN feature mask */
830 unsigned long vlan_features;
832 /* for setting kernel sock attribute on TCP connection setup */
833 #define GSO_MAX_SIZE 65536
834 unsigned int gso_max_size;
837 /* Data Center Bridging netlink ops */
838 struct dcbnl_rtnl_ops *dcbnl_ops;
841 #ifdef CONFIG_COMPAT_NET_DEV_OPS
843 int (*init)(struct net_device *dev);
844 void (*uninit)(struct net_device *dev);
845 int (*open)(struct net_device *dev);
846 int (*stop)(struct net_device *dev);
847 int (*hard_start_xmit) (struct sk_buff *skb,
848 struct net_device *dev);
849 u16 (*select_queue)(struct net_device *dev,
850 struct sk_buff *skb);
851 void (*change_rx_flags)(struct net_device *dev,
853 void (*set_rx_mode)(struct net_device *dev);
854 void (*set_multicast_list)(struct net_device *dev);
855 int (*set_mac_address)(struct net_device *dev,
857 int (*validate_addr)(struct net_device *dev);
858 int (*do_ioctl)(struct net_device *dev,
859 struct ifreq *ifr, int cmd);
860 int (*set_config)(struct net_device *dev,
862 int (*change_mtu)(struct net_device *dev, int new_mtu);
863 int (*neigh_setup)(struct net_device *dev,
864 struct neigh_parms *);
865 void (*tx_timeout) (struct net_device *dev);
866 struct net_device_stats* (*get_stats)(struct net_device *dev);
867 void (*vlan_rx_register)(struct net_device *dev,
868 struct vlan_group *grp);
869 void (*vlan_rx_add_vid)(struct net_device *dev,
871 void (*vlan_rx_kill_vid)(struct net_device *dev,
873 #ifdef CONFIG_NET_POLL_CONTROLLER
874 void (*poll_controller)(struct net_device *dev);
879 #define to_net_dev(d) container_of(d, struct net_device, dev)
881 #define NETDEV_ALIGN 32
882 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
885 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
888 return &dev->_tx[index];
891 static inline void netdev_for_each_tx_queue(struct net_device *dev,
892 void (*f)(struct net_device *,
893 struct netdev_queue *,
899 for (i = 0; i < dev->num_tx_queues; i++)
900 f(dev, &dev->_tx[i], arg);
904 * Net namespace inlines
907 struct net *dev_net(const struct net_device *dev)
917 void dev_net_set(struct net_device *dev, struct net *net)
920 release_net(dev->nd_net);
921 dev->nd_net = hold_net(net);
925 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
927 #ifdef CONFIG_NET_DSA_TAG_DSA
928 if (dev->dsa_ptr != NULL)
929 return dsa_uses_dsa_tags(dev->dsa_ptr);
935 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
937 #ifdef CONFIG_NET_DSA_TAG_TRAILER
938 if (dev->dsa_ptr != NULL)
939 return dsa_uses_trailer_tags(dev->dsa_ptr);
946 * netdev_priv - access network device private data
947 * @dev: network device
949 * Get network device private data
951 static inline void *netdev_priv(const struct net_device *dev)
953 return (char *)dev + ((sizeof(struct net_device)
954 + NETDEV_ALIGN_CONST)
955 & ~NETDEV_ALIGN_CONST);
958 /* Set the sysfs physical device reference for the network logical device
959 * if set prior to registration will cause a symlink during initialization.
961 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
964 * netif_napi_add - initialize a napi context
965 * @dev: network device
966 * @napi: napi context
967 * @poll: polling function
968 * @weight: default weight
970 * netif_napi_add() must be used to initialize a napi context prior to calling
971 * *any* of the other napi related functions.
973 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
974 int (*poll)(struct napi_struct *, int), int weight);
977 * netif_napi_del - remove a napi context
978 * @napi: napi context
980 * netif_napi_del() removes a napi context from the network device napi list
982 void netif_napi_del(struct napi_struct *napi);
985 /* This is non-zero if the packet may be of the same flow. */
988 /* This is non-zero if the packet cannot be merged with the new skb. */
991 /* Number of segments aggregated. */
995 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
998 __be16 type; /* This is really htons(ether_type). */
999 struct net_device *dev; /* NULL is wildcarded here */
1000 int (*func) (struct sk_buff *,
1001 struct net_device *,
1002 struct packet_type *,
1003 struct net_device *);
1004 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1006 int (*gso_send_check)(struct sk_buff *skb);
1007 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1008 struct sk_buff *skb);
1009 int (*gro_complete)(struct sk_buff *skb);
1010 void *af_packet_priv;
1011 struct list_head list;
1014 #include <linux/interrupt.h>
1015 #include <linux/notifier.h>
1017 extern rwlock_t dev_base_lock; /* Device list lock */
1020 #define for_each_netdev(net, d) \
1021 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1022 #define for_each_netdev_safe(net, d, n) \
1023 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1024 #define for_each_netdev_continue(net, d) \
1025 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1026 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1028 static inline struct net_device *next_net_device(struct net_device *dev)
1030 struct list_head *lh;
1034 lh = dev->dev_list.next;
1035 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1038 static inline struct net_device *first_net_device(struct net *net)
1040 return list_empty(&net->dev_base_head) ? NULL :
1041 net_device_entry(net->dev_base_head.next);
1044 extern int netdev_boot_setup_check(struct net_device *dev);
1045 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1046 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1047 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1048 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1049 extern void dev_add_pack(struct packet_type *pt);
1050 extern void dev_remove_pack(struct packet_type *pt);
1051 extern void __dev_remove_pack(struct packet_type *pt);
1053 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1054 unsigned short mask);
1055 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1056 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1057 extern int dev_alloc_name(struct net_device *dev, const char *name);
1058 extern int dev_open(struct net_device *dev);
1059 extern int dev_close(struct net_device *dev);
1060 extern void dev_disable_lro(struct net_device *dev);
1061 extern int dev_queue_xmit(struct sk_buff *skb);
1062 extern int register_netdevice(struct net_device *dev);
1063 extern void unregister_netdevice(struct net_device *dev);
1064 extern void free_netdev(struct net_device *dev);
1065 extern void synchronize_net(void);
1066 extern int register_netdevice_notifier(struct notifier_block *nb);
1067 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1068 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1069 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1070 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1071 extern int dev_restart(struct net_device *dev);
1072 #ifdef CONFIG_NETPOLL_TRAP
1073 extern int netpoll_trap(void);
1076 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1077 unsigned short type,
1078 const void *daddr, const void *saddr,
1081 if (!dev->header_ops || !dev->header_ops->create)
1084 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1087 static inline int dev_parse_header(const struct sk_buff *skb,
1088 unsigned char *haddr)
1090 const struct net_device *dev = skb->dev;
1092 if (!dev->header_ops || !dev->header_ops->parse)
1094 return dev->header_ops->parse(skb, haddr);
1097 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1098 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1099 static inline int unregister_gifconf(unsigned int family)
1101 return register_gifconf(family, NULL);
1105 * Incoming packets are placed on per-cpu queues so that
1106 * no locking is needed.
1110 struct Qdisc *output_queue;
1111 struct sk_buff_head input_pkt_queue;
1112 struct list_head poll_list;
1113 struct sk_buff *completion_queue;
1115 struct napi_struct backlog;
1116 #ifdef CONFIG_NET_DMA
1117 struct dma_chan *net_dma;
1121 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1123 #define HAVE_NETIF_QUEUE
1125 extern void __netif_schedule(struct Qdisc *q);
1127 static inline void netif_schedule_queue(struct netdev_queue *txq)
1129 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1130 __netif_schedule(txq->qdisc);
1133 static inline void netif_tx_schedule_all(struct net_device *dev)
1137 for (i = 0; i < dev->num_tx_queues; i++)
1138 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1141 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1143 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1147 * netif_start_queue - allow transmit
1148 * @dev: network device
1150 * Allow upper layers to call the device hard_start_xmit routine.
1152 static inline void netif_start_queue(struct net_device *dev)
1154 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1157 static inline void netif_tx_start_all_queues(struct net_device *dev)
1161 for (i = 0; i < dev->num_tx_queues; i++) {
1162 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1163 netif_tx_start_queue(txq);
1167 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1169 #ifdef CONFIG_NETPOLL_TRAP
1170 if (netpoll_trap()) {
1171 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1175 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1176 __netif_schedule(dev_queue->qdisc);
1180 * netif_wake_queue - restart transmit
1181 * @dev: network device
1183 * Allow upper layers to call the device hard_start_xmit routine.
1184 * Used for flow control when transmit resources are available.
1186 static inline void netif_wake_queue(struct net_device *dev)
1188 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1191 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1195 for (i = 0; i < dev->num_tx_queues; i++) {
1196 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1197 netif_tx_wake_queue(txq);
1201 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1203 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1207 * netif_stop_queue - stop transmitted packets
1208 * @dev: network device
1210 * Stop upper layers calling the device hard_start_xmit routine.
1211 * Used for flow control when transmit resources are unavailable.
1213 static inline void netif_stop_queue(struct net_device *dev)
1215 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1218 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1222 for (i = 0; i < dev->num_tx_queues; i++) {
1223 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1224 netif_tx_stop_queue(txq);
1228 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1230 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1234 * netif_queue_stopped - test if transmit queue is flowblocked
1235 * @dev: network device
1237 * Test if transmit queue on device is currently unable to send.
1239 static inline int netif_queue_stopped(const struct net_device *dev)
1241 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1244 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1246 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1250 * netif_running - test if up
1251 * @dev: network device
1253 * Test if the device has been brought up.
1255 static inline int netif_running(const struct net_device *dev)
1257 return test_bit(__LINK_STATE_START, &dev->state);
1261 * Routines to manage the subqueues on a device. We only need start
1262 * stop, and a check if it's stopped. All other device management is
1263 * done at the overall netdevice level.
1264 * Also test the device if we're multiqueue.
1268 * netif_start_subqueue - allow sending packets on subqueue
1269 * @dev: network device
1270 * @queue_index: sub queue index
1272 * Start individual transmit queue of a device with multiple transmit queues.
1274 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1276 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1277 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1281 * netif_stop_subqueue - stop sending packets on subqueue
1282 * @dev: network device
1283 * @queue_index: sub queue index
1285 * Stop individual transmit queue of a device with multiple transmit queues.
1287 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1289 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1290 #ifdef CONFIG_NETPOLL_TRAP
1294 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1298 * netif_subqueue_stopped - test status of subqueue
1299 * @dev: network device
1300 * @queue_index: sub queue index
1302 * Check individual transmit queue of a device with multiple transmit queues.
1304 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1307 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1308 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1311 static inline int netif_subqueue_stopped(const struct net_device *dev,
1312 struct sk_buff *skb)
1314 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1318 * netif_wake_subqueue - allow sending packets on subqueue
1319 * @dev: network device
1320 * @queue_index: sub queue index
1322 * Resume individual transmit queue of a device with multiple transmit queues.
1324 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1326 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1327 #ifdef CONFIG_NETPOLL_TRAP
1331 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1332 __netif_schedule(txq->qdisc);
1336 * netif_is_multiqueue - test if device has multiple transmit queues
1337 * @dev: network device
1339 * Check if device has multiple transmit queues
1341 static inline int netif_is_multiqueue(const struct net_device *dev)
1343 return (dev->num_tx_queues > 1);
1346 /* Use this variant when it is known for sure that it
1347 * is executing from hardware interrupt context or with hardware interrupts
1350 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1352 /* Use this variant in places where it could be invoked
1353 * from either hardware interrupt or other context, with hardware interrupts
1354 * either disabled or enabled.
1356 extern void dev_kfree_skb_any(struct sk_buff *skb);
1358 #define HAVE_NETIF_RX 1
1359 extern int netif_rx(struct sk_buff *skb);
1360 extern int netif_rx_ni(struct sk_buff *skb);
1361 #define HAVE_NETIF_RECEIVE_SKB 1
1362 extern int netif_receive_skb(struct sk_buff *skb);
1363 extern void napi_gro_flush(struct napi_struct *napi);
1364 extern int napi_gro_receive(struct napi_struct *napi,
1365 struct sk_buff *skb);
1366 extern void netif_nit_deliver(struct sk_buff *skb);
1367 extern int dev_valid_name(const char *name);
1368 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1369 extern int dev_ethtool(struct net *net, struct ifreq *);
1370 extern unsigned dev_get_flags(const struct net_device *);
1371 extern int dev_change_flags(struct net_device *, unsigned);
1372 extern int dev_change_name(struct net_device *, const char *);
1373 extern int dev_set_alias(struct net_device *, const char *, size_t);
1374 extern int dev_change_net_namespace(struct net_device *,
1375 struct net *, const char *);
1376 extern int dev_set_mtu(struct net_device *, int);
1377 extern int dev_set_mac_address(struct net_device *,
1379 extern int dev_hard_start_xmit(struct sk_buff *skb,
1380 struct net_device *dev,
1381 struct netdev_queue *txq);
1383 extern int netdev_budget;
1385 /* Called by rtnetlink.c:rtnl_unlock() */
1386 extern void netdev_run_todo(void);
1389 * dev_put - release reference to device
1390 * @dev: network device
1392 * Release reference to device to allow it to be freed.
1394 static inline void dev_put(struct net_device *dev)
1396 atomic_dec(&dev->refcnt);
1400 * dev_hold - get reference to device
1401 * @dev: network device
1403 * Hold reference to device to keep it from being freed.
1405 static inline void dev_hold(struct net_device *dev)
1407 atomic_inc(&dev->refcnt);
1410 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1411 * and _off may be called from IRQ context, but it is caller
1412 * who is responsible for serialization of these calls.
1414 * The name carrier is inappropriate, these functions should really be
1415 * called netif_lowerlayer_*() because they represent the state of any
1416 * kind of lower layer not just hardware media.
1419 extern void linkwatch_fire_event(struct net_device *dev);
1422 * netif_carrier_ok - test if carrier present
1423 * @dev: network device
1425 * Check if carrier is present on device
1427 static inline int netif_carrier_ok(const struct net_device *dev)
1429 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1432 extern void __netdev_watchdog_up(struct net_device *dev);
1434 extern void netif_carrier_on(struct net_device *dev);
1436 extern void netif_carrier_off(struct net_device *dev);
1439 * netif_dormant_on - mark device as dormant.
1440 * @dev: network device
1442 * Mark device as dormant (as per RFC2863).
1444 * The dormant state indicates that the relevant interface is not
1445 * actually in a condition to pass packets (i.e., it is not 'up') but is
1446 * in a "pending" state, waiting for some external event. For "on-
1447 * demand" interfaces, this new state identifies the situation where the
1448 * interface is waiting for events to place it in the up state.
1451 static inline void netif_dormant_on(struct net_device *dev)
1453 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1454 linkwatch_fire_event(dev);
1458 * netif_dormant_off - set device as not dormant.
1459 * @dev: network device
1461 * Device is not in dormant state.
1463 static inline void netif_dormant_off(struct net_device *dev)
1465 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1466 linkwatch_fire_event(dev);
1470 * netif_dormant - test if carrier present
1471 * @dev: network device
1473 * Check if carrier is present on device
1475 static inline int netif_dormant(const struct net_device *dev)
1477 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1482 * netif_oper_up - test if device is operational
1483 * @dev: network device
1485 * Check if carrier is operational
1487 static inline int netif_oper_up(const struct net_device *dev) {
1488 return (dev->operstate == IF_OPER_UP ||
1489 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1493 * netif_device_present - is device available or removed
1494 * @dev: network device
1496 * Check if device has not been removed from system.
1498 static inline int netif_device_present(struct net_device *dev)
1500 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1503 extern void netif_device_detach(struct net_device *dev);
1505 extern void netif_device_attach(struct net_device *dev);
1508 * Network interface message level settings
1510 #define HAVE_NETIF_MSG 1
1513 NETIF_MSG_DRV = 0x0001,
1514 NETIF_MSG_PROBE = 0x0002,
1515 NETIF_MSG_LINK = 0x0004,
1516 NETIF_MSG_TIMER = 0x0008,
1517 NETIF_MSG_IFDOWN = 0x0010,
1518 NETIF_MSG_IFUP = 0x0020,
1519 NETIF_MSG_RX_ERR = 0x0040,
1520 NETIF_MSG_TX_ERR = 0x0080,
1521 NETIF_MSG_TX_QUEUED = 0x0100,
1522 NETIF_MSG_INTR = 0x0200,
1523 NETIF_MSG_TX_DONE = 0x0400,
1524 NETIF_MSG_RX_STATUS = 0x0800,
1525 NETIF_MSG_PKTDATA = 0x1000,
1526 NETIF_MSG_HW = 0x2000,
1527 NETIF_MSG_WOL = 0x4000,
1530 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1531 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1532 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1533 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1534 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1535 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1536 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1537 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1538 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1539 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1540 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1541 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1542 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1543 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1544 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1546 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1549 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1550 return default_msg_enable_bits;
1551 if (debug_value == 0) /* no output */
1553 /* set low N bits */
1554 return (1 << debug_value) - 1;
1557 /* Test if receive needs to be scheduled but only if up */
1558 static inline int netif_rx_schedule_prep(struct napi_struct *napi)
1560 return napi_schedule_prep(napi);
1563 /* Add interface to tail of rx poll list. This assumes that _prep has
1564 * already been called and returned 1.
1566 static inline void __netif_rx_schedule(struct napi_struct *napi)
1568 __napi_schedule(napi);
1571 /* Try to reschedule poll. Called by irq handler. */
1573 static inline void netif_rx_schedule(struct napi_struct *napi)
1575 if (netif_rx_schedule_prep(napi))
1576 __netif_rx_schedule(napi);
1579 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1580 static inline int netif_rx_reschedule(struct napi_struct *napi)
1582 if (napi_schedule_prep(napi)) {
1583 __netif_rx_schedule(napi);
1589 /* same as netif_rx_complete, except that local_irq_save(flags)
1590 * has already been issued
1592 static inline void __netif_rx_complete(struct napi_struct *napi)
1594 __napi_complete(napi);
1597 /* Remove interface from poll list: it must be in the poll list
1598 * on current cpu. This primitive is called by dev->poll(), when
1599 * it completes the work. The device cannot be out of poll list at this
1600 * moment, it is BUG().
1602 static inline void netif_rx_complete(struct napi_struct *napi)
1604 napi_complete(napi);
1607 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1609 spin_lock(&txq->_xmit_lock);
1610 txq->xmit_lock_owner = cpu;
1613 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1615 spin_lock_bh(&txq->_xmit_lock);
1616 txq->xmit_lock_owner = smp_processor_id();
1619 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1621 int ok = spin_trylock(&txq->_xmit_lock);
1623 txq->xmit_lock_owner = smp_processor_id();
1627 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1629 txq->xmit_lock_owner = -1;
1630 spin_unlock(&txq->_xmit_lock);
1633 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1635 txq->xmit_lock_owner = -1;
1636 spin_unlock_bh(&txq->_xmit_lock);
1640 * netif_tx_lock - grab network device transmit lock
1641 * @dev: network device
1643 * Get network device transmit lock
1645 static inline void netif_tx_lock(struct net_device *dev)
1650 spin_lock(&dev->tx_global_lock);
1651 cpu = smp_processor_id();
1652 for (i = 0; i < dev->num_tx_queues; i++) {
1653 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1655 /* We are the only thread of execution doing a
1656 * freeze, but we have to grab the _xmit_lock in
1657 * order to synchronize with threads which are in
1658 * the ->hard_start_xmit() handler and already
1659 * checked the frozen bit.
1661 __netif_tx_lock(txq, cpu);
1662 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1663 __netif_tx_unlock(txq);
1667 static inline void netif_tx_lock_bh(struct net_device *dev)
1673 static inline void netif_tx_unlock(struct net_device *dev)
1677 for (i = 0; i < dev->num_tx_queues; i++) {
1678 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1680 /* No need to grab the _xmit_lock here. If the
1681 * queue is not stopped for another reason, we
1684 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1685 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1686 __netif_schedule(txq->qdisc);
1688 spin_unlock(&dev->tx_global_lock);
1691 static inline void netif_tx_unlock_bh(struct net_device *dev)
1693 netif_tx_unlock(dev);
1697 #define HARD_TX_LOCK(dev, txq, cpu) { \
1698 if ((dev->features & NETIF_F_LLTX) == 0) { \
1699 __netif_tx_lock(txq, cpu); \
1703 #define HARD_TX_UNLOCK(dev, txq) { \
1704 if ((dev->features & NETIF_F_LLTX) == 0) { \
1705 __netif_tx_unlock(txq); \
1709 static inline void netif_tx_disable(struct net_device *dev)
1715 cpu = smp_processor_id();
1716 for (i = 0; i < dev->num_tx_queues; i++) {
1717 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1719 __netif_tx_lock(txq, cpu);
1720 netif_tx_stop_queue(txq);
1721 __netif_tx_unlock(txq);
1726 static inline void netif_addr_lock(struct net_device *dev)
1728 spin_lock(&dev->addr_list_lock);
1731 static inline void netif_addr_lock_bh(struct net_device *dev)
1733 spin_lock_bh(&dev->addr_list_lock);
1736 static inline void netif_addr_unlock(struct net_device *dev)
1738 spin_unlock(&dev->addr_list_lock);
1741 static inline void netif_addr_unlock_bh(struct net_device *dev)
1743 spin_unlock_bh(&dev->addr_list_lock);
1746 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1748 extern void ether_setup(struct net_device *dev);
1750 /* Support for loadable net-drivers */
1751 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1752 void (*setup)(struct net_device *),
1753 unsigned int queue_count);
1754 #define alloc_netdev(sizeof_priv, name, setup) \
1755 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1756 extern int register_netdev(struct net_device *dev);
1757 extern void unregister_netdev(struct net_device *dev);
1758 /* Functions used for secondary unicast and multicast support */
1759 extern void dev_set_rx_mode(struct net_device *dev);
1760 extern void __dev_set_rx_mode(struct net_device *dev);
1761 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1762 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1763 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1764 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1765 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1766 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1767 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1768 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1769 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1770 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1771 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1772 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1773 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1774 extern int dev_set_allmulti(struct net_device *dev, int inc);
1775 extern void netdev_state_change(struct net_device *dev);
1776 extern void netdev_bonding_change(struct net_device *dev);
1777 extern void netdev_features_change(struct net_device *dev);
1778 /* Load a device via the kmod */
1779 extern void dev_load(struct net *net, const char *name);
1780 extern void dev_mcast_init(void);
1781 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1783 extern int netdev_max_backlog;
1784 extern int weight_p;
1785 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1786 extern int skb_checksum_help(struct sk_buff *skb);
1787 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1789 extern void netdev_rx_csum_fault(struct net_device *dev);
1791 static inline void netdev_rx_csum_fault(struct net_device *dev)
1795 /* rx skb timestamps */
1796 extern void net_enable_timestamp(void);
1797 extern void net_disable_timestamp(void);
1799 #ifdef CONFIG_PROC_FS
1800 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1801 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1802 extern void dev_seq_stop(struct seq_file *seq, void *v);
1805 extern int netdev_class_create_file(struct class_attribute *class_attr);
1806 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1808 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1810 extern void linkwatch_run_queue(void);
1812 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1813 unsigned long mask);
1814 unsigned long netdev_fix_features(unsigned long features, const char *name);
1816 static inline int net_gso_ok(int features, int gso_type)
1818 int feature = gso_type << NETIF_F_GSO_SHIFT;
1819 return (features & feature) == feature;
1822 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1824 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1827 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1829 return skb_is_gso(skb) &&
1830 (!skb_gso_ok(skb, dev->features) ||
1831 (skb_shinfo(skb)->frag_list &&
1832 !(dev->features & NETIF_F_FRAGLIST)) ||
1833 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1836 static inline void netif_set_gso_max_size(struct net_device *dev,
1839 dev->gso_max_size = size;
1842 /* On bonding slaves other than the currently active slave, suppress
1843 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1844 * ARP on active-backup slaves with arp_validate enabled.
1846 static inline int skb_bond_should_drop(struct sk_buff *skb)
1848 struct net_device *dev = skb->dev;
1849 struct net_device *master = dev->master;
1852 if (master->priv_flags & IFF_MASTER_ARPMON)
1853 dev->last_rx = jiffies;
1855 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1856 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1857 skb->protocol == __constant_htons(ETH_P_ARP))
1860 if (master->priv_flags & IFF_MASTER_ALB) {
1861 if (skb->pkt_type != PACKET_BROADCAST &&
1862 skb->pkt_type != PACKET_MULTICAST)
1865 if (master->priv_flags & IFF_MASTER_8023AD &&
1866 skb->protocol == __constant_htons(ETH_P_SLOW))
1875 extern struct pernet_operations __net_initdata loopback_net_ops;
1876 #endif /* __KERNEL__ */
1878 #endif /* _LINUX_DEV_H */