2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
33 #include <linux/timer.h>
34 #include <linux/delay.h>
36 #include <asm/atomic.h>
37 #include <asm/cache.h>
38 #include <asm/byteorder.h>
40 #include <linux/device.h>
41 #include <linux/percpu.h>
42 #include <linux/rculist.h>
43 #include <linux/dmaengine.h>
44 #include <linux/workqueue.h>
46 #include <linux/ethtool.h>
47 #include <net/net_namespace.h>
50 #include <net/dcbnl.h>
57 /* source back-compat hooks */
58 #define SET_ETHTOOL_OPS(netdev,ops) \
59 ( (netdev)->ethtool_ops = (ops) )
61 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
62 functions are available. */
63 #define HAVE_FREE_NETDEV /* free_netdev() */
64 #define HAVE_NETDEV_PRIV /* netdev_priv() */
66 #define NET_XMIT_SUCCESS 0
67 #define NET_XMIT_DROP 1 /* skb dropped */
68 #define NET_XMIT_CN 2 /* congestion notification */
69 #define NET_XMIT_POLICED 3 /* skb is shot by police */
70 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
72 /* Backlog congestion levels */
73 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
74 #define NET_RX_DROP 1 /* packet dropped */
76 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
77 * indicates that the device will soon be dropping packets, or already drops
78 * some packets of the same priority; prompting us to send less aggressively. */
79 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
80 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
84 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
86 /* Driver transmit return codes */
87 #define NETDEV_TX_OK 0 /* driver took care of packet */
88 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
89 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
94 * Compute the worst case header length according to the protocols
98 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
99 # if defined(CONFIG_MAC80211_MESH)
100 # define LL_MAX_HEADER 128
102 # define LL_MAX_HEADER 96
104 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
105 # define LL_MAX_HEADER 48
107 # define LL_MAX_HEADER 32
110 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
111 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
112 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
113 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
114 #define MAX_HEADER LL_MAX_HEADER
116 #define MAX_HEADER (LL_MAX_HEADER + 48)
119 #endif /* __KERNEL__ */
122 * Network device statistics. Akin to the 2.0 ether stats but
123 * with byte counters.
126 struct net_device_stats
128 unsigned long rx_packets
; /* total packets received */
129 unsigned long tx_packets
; /* total packets transmitted */
130 unsigned long rx_bytes
; /* total bytes received */
131 unsigned long tx_bytes
; /* total bytes transmitted */
132 unsigned long rx_errors
; /* bad packets received */
133 unsigned long tx_errors
; /* packet transmit problems */
134 unsigned long rx_dropped
; /* no space in linux buffers */
135 unsigned long tx_dropped
; /* no space available in linux */
136 unsigned long multicast
; /* multicast packets received */
137 unsigned long collisions
;
139 /* detailed rx_errors: */
140 unsigned long rx_length_errors
;
141 unsigned long rx_over_errors
; /* receiver ring buff overflow */
142 unsigned long rx_crc_errors
; /* recved pkt with crc error */
143 unsigned long rx_frame_errors
; /* recv'd frame alignment error */
144 unsigned long rx_fifo_errors
; /* recv'r fifo overrun */
145 unsigned long rx_missed_errors
; /* receiver missed packet */
147 /* detailed tx_errors */
148 unsigned long tx_aborted_errors
;
149 unsigned long tx_carrier_errors
;
150 unsigned long tx_fifo_errors
;
151 unsigned long tx_heartbeat_errors
;
152 unsigned long tx_window_errors
;
155 unsigned long rx_compressed
;
156 unsigned long tx_compressed
;
160 /* Media selection options. */
173 #include <linux/cache.h>
174 #include <linux/skbuff.h>
180 struct netif_rx_stats
184 unsigned time_squeeze
;
185 unsigned cpu_collision
;
188 DECLARE_PER_CPU(struct netif_rx_stats
, netdev_rx_stat
);
192 struct dev_addr_list
*next
;
193 u8 da_addr
[MAX_ADDR_LEN
];
201 * We tag multicasts with these structures.
204 #define dev_mc_list dev_addr_list
205 #define dmi_addr da_addr
206 #define dmi_addrlen da_addrlen
207 #define dmi_users da_users
208 #define dmi_gusers da_gusers
210 struct netdev_hw_addr
{
211 struct list_head list
;
212 unsigned char addr
[MAX_ADDR_LEN
];
214 #define NETDEV_HW_ADDR_T_LAN 1
215 #define NETDEV_HW_ADDR_T_SAN 2
216 #define NETDEV_HW_ADDR_T_SLAVE 3
217 #define NETDEV_HW_ADDR_T_UNICAST 4
220 struct rcu_head rcu_head
;
223 struct netdev_hw_addr_list
{
224 struct list_head list
;
230 struct hh_cache
*hh_next
; /* Next entry */
231 atomic_t hh_refcnt
; /* number of users */
233 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
235 * They are mostly read, but hh_refcnt may be changed quite frequently,
236 * incurring cache line ping pongs.
238 __be16 hh_type ____cacheline_aligned_in_smp
;
239 /* protocol identifier, f.e ETH_P_IP
240 * NOTE: For VLANs, this will be the
241 * encapuslated type. --BLG
243 u16 hh_len
; /* length of header */
244 int (*hh_output
)(struct sk_buff
*skb
);
247 /* cached hardware header; allow for machine alignment needs. */
248 #define HH_DATA_MOD 16
249 #define HH_DATA_OFF(__len) \
250 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
251 #define HH_DATA_ALIGN(__len) \
252 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
253 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
256 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
258 * dev->hard_header_len ? (dev->hard_header_len +
259 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
261 * We could use other alignment values, but we must maintain the
262 * relationship HH alignment <= LL alignment.
264 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
267 #define LL_RESERVED_SPACE(dev) \
268 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
269 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
270 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
271 #define LL_ALLOCATED_SPACE(dev) \
272 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
275 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
276 unsigned short type
, const void *daddr
,
277 const void *saddr
, unsigned len
);
278 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
279 int (*rebuild
)(struct sk_buff
*skb
);
280 #define HAVE_HEADER_CACHE
281 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
282 void (*cache_update
)(struct hh_cache
*hh
,
283 const struct net_device
*dev
,
284 const unsigned char *haddr
);
287 /* These flag bits are private to the generic network queueing
288 * layer, they may not be explicitly referenced by any other
295 __LINK_STATE_PRESENT
,
296 __LINK_STATE_NOCARRIER
,
297 __LINK_STATE_LINKWATCH_PENDING
,
298 __LINK_STATE_DORMANT
,
303 * This structure holds at boot time configured netdevice settings. They
304 * are then used in the device probing.
306 struct netdev_boot_setup
{
310 #define NETDEV_BOOT_SETUP_MAX 8
312 extern int __init
netdev_boot_setup(char *str
);
315 * Structure for NAPI scheduling similar to tasklet but with weighting
318 /* The poll_list must only be managed by the entity which
319 * changes the state of the NAPI_STATE_SCHED bit. This means
320 * whoever atomically sets that bit can add this napi_struct
321 * to the per-cpu poll_list, and whoever clears that bit
322 * can remove from the list right before clearing the bit.
324 struct list_head poll_list
;
328 int (*poll
)(struct napi_struct
*, int);
329 #ifdef CONFIG_NETPOLL
330 spinlock_t poll_lock
;
334 unsigned int gro_count
;
336 struct net_device
*dev
;
337 struct list_head dev_list
;
338 struct sk_buff
*gro_list
;
344 NAPI_STATE_SCHED
, /* Poll is scheduled */
345 NAPI_STATE_DISABLE
, /* Disable pending */
346 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
357 extern void __napi_schedule(struct napi_struct
*n
);
359 static inline int napi_disable_pending(struct napi_struct
*n
)
361 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
365 * napi_schedule_prep - check if napi can be scheduled
368 * Test if NAPI routine is already running, and if not mark
369 * it as running. This is used as a condition variable
370 * insure only one NAPI poll instance runs. We also make
371 * sure there is no pending NAPI disable.
373 static inline int napi_schedule_prep(struct napi_struct
*n
)
375 return !napi_disable_pending(n
) &&
376 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
380 * napi_schedule - schedule NAPI poll
383 * Schedule NAPI poll routine to be called if it is not already
386 static inline void napi_schedule(struct napi_struct
*n
)
388 if (napi_schedule_prep(n
))
392 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
393 static inline int napi_reschedule(struct napi_struct
*napi
)
395 if (napi_schedule_prep(napi
)) {
396 __napi_schedule(napi
);
403 * napi_complete - NAPI processing complete
406 * Mark NAPI processing as complete.
408 extern void __napi_complete(struct napi_struct
*n
);
409 extern void napi_complete(struct napi_struct
*n
);
412 * napi_disable - prevent NAPI from scheduling
415 * Stop NAPI from being scheduled on this context.
416 * Waits till any outstanding processing completes.
418 static inline void napi_disable(struct napi_struct
*n
)
420 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
421 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
423 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
427 * napi_enable - enable NAPI scheduling
430 * Resume NAPI from being scheduled on this context.
431 * Must be paired with napi_disable.
433 static inline void napi_enable(struct napi_struct
*n
)
435 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
436 smp_mb__before_clear_bit();
437 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
442 * napi_synchronize - wait until NAPI is not running
445 * Wait until NAPI is done being scheduled on this context.
446 * Waits till any outstanding processing completes but
447 * does not disable future activations.
449 static inline void napi_synchronize(const struct napi_struct
*n
)
451 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
455 # define napi_synchronize(n) barrier()
458 enum netdev_queue_state_t
461 __QUEUE_STATE_FROZEN
,
464 struct netdev_queue
{
468 struct net_device
*dev
;
471 struct Qdisc
*qdisc_sleeping
;
475 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
478 * please use this field instead of dev->trans_start
480 unsigned long trans_start
;
481 unsigned long tx_bytes
;
482 unsigned long tx_packets
;
483 unsigned long tx_dropped
;
484 } ____cacheline_aligned_in_smp
;
488 * This structure defines the management hooks for network devices.
489 * The following hooks can be defined; unless noted otherwise, they are
490 * optional and can be filled with a null pointer.
492 * int (*ndo_init)(struct net_device *dev);
493 * This function is called once when network device is registered.
494 * The network device can use this to any late stage initializaton
495 * or semantic validattion. It can fail with an error code which will
496 * be propogated back to register_netdev
498 * void (*ndo_uninit)(struct net_device *dev);
499 * This function is called when device is unregistered or when registration
500 * fails. It is not called if init fails.
502 * int (*ndo_open)(struct net_device *dev);
503 * This function is called when network device transistions to the up
506 * int (*ndo_stop)(struct net_device *dev);
507 * This function is called when network device transistions to the down
510 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
511 * Called when a packet needs to be transmitted.
512 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
513 * Required can not be NULL.
515 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
516 * Called to decide which queue to when device supports multiple
519 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
520 * This function is called to allow device receiver to make
521 * changes to configuration when multicast or promiscious is enabled.
523 * void (*ndo_set_rx_mode)(struct net_device *dev);
524 * This function is called device changes address list filtering.
526 * void (*ndo_set_multicast_list)(struct net_device *dev);
527 * This function is called when the multicast address list changes.
529 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
530 * This function is called when the Media Access Control address
531 * needs to be changed. If this interface is not defined, the
532 * mac address can not be changed.
534 * int (*ndo_validate_addr)(struct net_device *dev);
535 * Test if Media Access Control address is valid for the device.
537 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
538 * Called when a user request an ioctl which can't be handled by
539 * the generic interface code. If not defined ioctl's return
540 * not supported error code.
542 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
543 * Used to set network devices bus interface parameters. This interface
544 * is retained for legacy reason, new devices should use the bus
545 * interface (PCI) for low level management.
547 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
548 * Called when a user wants to change the Maximum Transfer Unit
549 * of a device. If not defined, any request to change MTU will
550 * will return an error.
552 * void (*ndo_tx_timeout)(struct net_device *dev);
553 * Callback uses when the transmitter has not made any progress
554 * for dev->watchdog ticks.
556 * struct net_device_stats* (*get_stats)(struct net_device *dev);
557 * Called when a user wants to get the network device usage
558 * statistics. If not defined, the counters in dev->stats will
561 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
562 * If device support VLAN receive accleration
563 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
564 * when vlan groups for the device changes. Note: grp is NULL
565 * if no vlan's groups are being used.
567 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
568 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
569 * this function is called when a VLAN id is registered.
571 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
572 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
573 * this function is called when a VLAN id is unregistered.
575 * void (*ndo_poll_controller)(struct net_device *dev);
577 #define HAVE_NET_DEVICE_OPS
578 struct net_device_ops
{
579 int (*ndo_init
)(struct net_device
*dev
);
580 void (*ndo_uninit
)(struct net_device
*dev
);
581 int (*ndo_open
)(struct net_device
*dev
);
582 int (*ndo_stop
)(struct net_device
*dev
);
583 int (*ndo_start_xmit
) (struct sk_buff
*skb
,
584 struct net_device
*dev
);
585 u16 (*ndo_select_queue
)(struct net_device
*dev
,
586 struct sk_buff
*skb
);
587 #define HAVE_CHANGE_RX_FLAGS
588 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
590 #define HAVE_SET_RX_MODE
591 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
592 #define HAVE_MULTICAST
593 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
594 #define HAVE_SET_MAC_ADDR
595 int (*ndo_set_mac_address
)(struct net_device
*dev
,
597 #define HAVE_VALIDATE_ADDR
598 int (*ndo_validate_addr
)(struct net_device
*dev
);
599 #define HAVE_PRIVATE_IOCTL
600 int (*ndo_do_ioctl
)(struct net_device
*dev
,
601 struct ifreq
*ifr
, int cmd
);
602 #define HAVE_SET_CONFIG
603 int (*ndo_set_config
)(struct net_device
*dev
,
605 #define HAVE_CHANGE_MTU
606 int (*ndo_change_mtu
)(struct net_device
*dev
,
608 int (*ndo_neigh_setup
)(struct net_device
*dev
,
609 struct neigh_parms
*);
610 #define HAVE_TX_TIMEOUT
611 void (*ndo_tx_timeout
) (struct net_device
*dev
);
613 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
615 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
616 struct vlan_group
*grp
);
617 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
619 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
621 #ifdef CONFIG_NET_POLL_CONTROLLER
622 #define HAVE_NETDEV_POLL
623 void (*ndo_poll_controller
)(struct net_device
*dev
);
625 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
626 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
628 struct scatterlist
*sgl
,
630 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
636 * The DEVICE structure.
637 * Actually, this whole structure is a big mistake. It mixes I/O
638 * data with strictly "high-level" data, and it has to know about
639 * almost every data structure used in the INET module.
641 * FIXME: cleanup struct net_device such that network protocol info
649 * This is the first field of the "visible" part of this structure
650 * (i.e. as seen by users in the "Space.c" file). It is the name
654 /* device name hash chain */
655 struct hlist_node name_hlist
;
660 * I/O specific fields
661 * FIXME: Merge these and struct ifmap into one
663 unsigned long mem_end
; /* shared mem end */
664 unsigned long mem_start
; /* shared mem start */
665 unsigned long base_addr
; /* device I/O address */
666 unsigned int irq
; /* device IRQ number */
669 * Some hardware also needs these fields, but they are not
670 * part of the usual set specified in Space.c.
673 unsigned char if_port
; /* Selectable AUI, TP,..*/
674 unsigned char dma
; /* DMA channel */
678 struct list_head dev_list
;
679 struct list_head napi_list
;
681 /* Net device features */
682 unsigned long features
;
683 #define NETIF_F_SG 1 /* Scatter/gather IO. */
684 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
685 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
686 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
687 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
688 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
689 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
690 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
691 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
692 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
693 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
694 #define NETIF_F_GSO 2048 /* Enable software GSO. */
695 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
696 /* do not use LLTX in new drivers */
697 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
698 #define NETIF_F_GRO 16384 /* Generic receive offload */
699 #define NETIF_F_LRO 32768 /* large receive offload */
701 /* the GSO_MASK reserves bits 16 through 23 */
702 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
703 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
705 /* Segmentation offload features */
706 #define NETIF_F_GSO_SHIFT 16
707 #define NETIF_F_GSO_MASK 0x00ff0000
708 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
709 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
710 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
711 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
712 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
713 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
715 /* List of features with software fallbacks. */
716 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
719 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
720 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
721 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
722 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
725 * If one device supports one of these features, then enable them
726 * for all in netdev_increment_features.
728 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
729 NETIF_F_SG | NETIF_F_HIGHDMA | \
732 /* Interface index. Unique device identifier */
736 struct net_device_stats stats
;
738 #ifdef CONFIG_WIRELESS_EXT
739 /* List of functions to handle Wireless Extensions (instead of ioctl).
740 * See <net/iw_handler.h> for details. Jean II */
741 const struct iw_handler_def
* wireless_handlers
;
742 /* Instance data managed by the core of Wireless Extensions. */
743 struct iw_public_data
* wireless_data
;
745 /* Management operations */
746 const struct net_device_ops
*netdev_ops
;
747 const struct ethtool_ops
*ethtool_ops
;
749 /* Hardware header description */
750 const struct header_ops
*header_ops
;
752 unsigned int flags
; /* interface flags (a la BSD) */
753 unsigned short gflags
;
754 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
755 unsigned short padded
; /* How much padding added by alloc_netdev() */
757 unsigned char operstate
; /* RFC2863 operstate */
758 unsigned char link_mode
; /* mapping policy to operstate */
760 unsigned mtu
; /* interface MTU value */
761 unsigned short type
; /* interface hardware type */
762 unsigned short hard_header_len
; /* hardware hdr length */
764 /* extra head- and tailroom the hardware may need, but not in all cases
765 * can this be guaranteed, especially tailroom. Some cases also use
766 * LL_MAX_HEADER instead to allocate the skb.
768 unsigned short needed_headroom
;
769 unsigned short needed_tailroom
;
771 struct net_device
*master
; /* Pointer to master device of a group,
772 * which this device is member of.
775 /* Interface address info. */
776 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
777 unsigned char addr_len
; /* hardware address length */
778 unsigned short dev_id
; /* for shared network cards */
780 struct netdev_hw_addr_list uc
; /* Secondary unicast
783 spinlock_t addr_list_lock
;
784 struct dev_addr_list
*mc_list
; /* Multicast mac addresses */
785 int mc_count
; /* Number of installed mcasts */
786 unsigned int promiscuity
;
787 unsigned int allmulti
;
790 /* Protocol specific pointers */
792 #ifdef CONFIG_NET_DSA
793 void *dsa_ptr
; /* dsa specific data */
795 void *atalk_ptr
; /* AppleTalk link */
796 void *ip_ptr
; /* IPv4 specific data */
797 void *dn_ptr
; /* DECnet specific data */
798 void *ip6_ptr
; /* IPv6 specific data */
799 void *ec_ptr
; /* Econet specific data */
800 void *ax25_ptr
; /* AX.25 specific data */
801 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
802 assign before registering */
805 * Cache line mostly used on receive path (including eth_type_trans())
807 unsigned long last_rx
; /* Time of last Rx */
808 /* Interface address info used in eth_type_trans() */
809 unsigned char *dev_addr
; /* hw address, (before bcast
810 because most packets are
813 struct netdev_hw_addr_list dev_addrs
; /* list of device
816 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
818 struct netdev_queue rx_queue
;
820 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
822 /* Number of TX queues allocated at alloc_netdev_mq() time */
823 unsigned int num_tx_queues
;
825 /* Number of TX queues currently active in device */
826 unsigned int real_num_tx_queues
;
828 unsigned long tx_queue_len
; /* Max frames per queue allowed */
829 spinlock_t tx_global_lock
;
831 * One part is mostly used on xmit path (device)
833 /* These may be needed for future network-power-down code. */
836 * trans_start here is expensive for high speed devices on SMP,
837 * please use netdev_queue->trans_start instead.
839 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
841 int watchdog_timeo
; /* used by dev_watchdog() */
842 struct timer_list watchdog_timer
;
844 /* Number of references to this device */
845 atomic_t refcnt ____cacheline_aligned_in_smp
;
847 /* delayed register/unregister */
848 struct list_head todo_list
;
849 /* device index hash chain */
850 struct hlist_node index_hlist
;
852 struct net_device
*link_watch_next
;
854 /* register/unregister state machine */
855 enum { NETREG_UNINITIALIZED
=0,
856 NETREG_REGISTERED
, /* completed register_netdevice */
857 NETREG_UNREGISTERING
, /* called unregister_netdevice */
858 NETREG_UNREGISTERED
, /* completed unregister todo */
859 NETREG_RELEASED
, /* called free_netdev */
860 NETREG_DUMMY
, /* dummy device for NAPI poll */
863 /* Called from unregister, can be used to call free_netdev */
864 void (*destructor
)(struct net_device
*dev
);
866 #ifdef CONFIG_NETPOLL
867 struct netpoll_info
*npinfo
;
871 /* Network namespace this network device is inside */
875 /* mid-layer private */
879 struct net_bridge_port
*br_port
;
881 struct macvlan_port
*macvlan_port
;
883 struct garp_port
*garp_port
;
885 /* class/net/name entry */
887 /* space for optional statistics and wireless sysfs groups */
888 struct attribute_group
*sysfs_groups
[3];
890 /* rtnetlink link ops */
891 const struct rtnl_link_ops
*rtnl_link_ops
;
893 /* VLAN feature mask */
894 unsigned long vlan_features
;
896 /* for setting kernel sock attribute on TCP connection setup */
897 #define GSO_MAX_SIZE 65536
898 unsigned int gso_max_size
;
901 /* Data Center Bridging netlink ops */
902 struct dcbnl_rtnl_ops
*dcbnl_ops
;
905 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
906 /* max exchange id for FCoE LRO by ddp */
907 unsigned int fcoe_ddp_xid
;
910 #define to_net_dev(d) container_of(d, struct net_device, dev)
912 #define NETDEV_ALIGN 32
915 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
918 return &dev
->_tx
[index
];
921 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
922 void (*f
)(struct net_device
*,
923 struct netdev_queue
*,
929 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
930 f(dev
, &dev
->_tx
[i
], arg
);
934 * Net namespace inlines
937 struct net
*dev_net(const struct net_device
*dev
)
947 void dev_net_set(struct net_device
*dev
, struct net
*net
)
950 release_net(dev
->nd_net
);
951 dev
->nd_net
= hold_net(net
);
955 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
957 #ifdef CONFIG_NET_DSA_TAG_DSA
958 if (dev
->dsa_ptr
!= NULL
)
959 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
965 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
967 #ifdef CONFIG_NET_DSA_TAG_TRAILER
968 if (dev
->dsa_ptr
!= NULL
)
969 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
976 * netdev_priv - access network device private data
977 * @dev: network device
979 * Get network device private data
981 static inline void *netdev_priv(const struct net_device
*dev
)
983 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
986 /* Set the sysfs physical device reference for the network logical device
987 * if set prior to registration will cause a symlink during initialization.
989 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
992 * netif_napi_add - initialize a napi context
993 * @dev: network device
994 * @napi: napi context
995 * @poll: polling function
996 * @weight: default weight
998 * netif_napi_add() must be used to initialize a napi context prior to calling
999 * *any* of the other napi related functions.
1001 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1002 int (*poll
)(struct napi_struct
*, int), int weight
);
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 void netif_napi_del(struct napi_struct
*napi
);
1012 struct napi_gro_cb
{
1013 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1016 /* Length of frag0. */
1017 unsigned int frag0_len
;
1019 /* This indicates where we are processing relative to skb->data. */
1022 /* This is non-zero if the packet may be of the same flow. */
1025 /* This is non-zero if the packet cannot be merged with the new skb. */
1028 /* Number of segments aggregated. */
1035 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1037 struct packet_type
{
1038 __be16 type
; /* This is really htons(ether_type). */
1039 struct net_device
*dev
; /* NULL is wildcarded here */
1040 int (*func
) (struct sk_buff
*,
1041 struct net_device
*,
1042 struct packet_type
*,
1043 struct net_device
*);
1044 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1046 int (*gso_send_check
)(struct sk_buff
*skb
);
1047 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1048 struct sk_buff
*skb
);
1049 int (*gro_complete
)(struct sk_buff
*skb
);
1050 void *af_packet_priv
;
1051 struct list_head list
;
1054 #include <linux/interrupt.h>
1055 #include <linux/notifier.h>
1057 extern rwlock_t dev_base_lock
; /* Device list lock */
1060 #define for_each_netdev(net, d) \
1061 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1062 #define for_each_netdev_safe(net, d, n) \
1063 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1064 #define for_each_netdev_continue(net, d) \
1065 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1066 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1068 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1070 struct list_head
*lh
;
1074 lh
= dev
->dev_list
.next
;
1075 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1078 static inline struct net_device
*first_net_device(struct net
*net
)
1080 return list_empty(&net
->dev_base_head
) ? NULL
:
1081 net_device_entry(net
->dev_base_head
.next
);
1084 extern int netdev_boot_setup_check(struct net_device
*dev
);
1085 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1086 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1087 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1088 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1089 extern void dev_add_pack(struct packet_type
*pt
);
1090 extern void dev_remove_pack(struct packet_type
*pt
);
1091 extern void __dev_remove_pack(struct packet_type
*pt
);
1093 extern struct net_device
*dev_get_by_flags(struct net
*net
, unsigned short flags
,
1094 unsigned short mask
);
1095 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1096 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1097 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1098 extern int dev_open(struct net_device
*dev
);
1099 extern int dev_close(struct net_device
*dev
);
1100 extern void dev_disable_lro(struct net_device
*dev
);
1101 extern int dev_queue_xmit(struct sk_buff
*skb
);
1102 extern int register_netdevice(struct net_device
*dev
);
1103 extern void unregister_netdevice(struct net_device
*dev
);
1104 extern void free_netdev(struct net_device
*dev
);
1105 extern void synchronize_net(void);
1106 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1107 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1108 extern int init_dummy_netdev(struct net_device
*dev
);
1109 extern void netdev_resync_ops(struct net_device
*dev
);
1111 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1112 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1113 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1114 extern int dev_restart(struct net_device
*dev
);
1115 #ifdef CONFIG_NETPOLL_TRAP
1116 extern int netpoll_trap(void);
1118 extern int skb_gro_receive(struct sk_buff
**head
,
1119 struct sk_buff
*skb
);
1120 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1122 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1124 return NAPI_GRO_CB(skb
)->data_offset
;
1127 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1129 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1132 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1134 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1137 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1138 unsigned int offset
)
1140 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1143 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1145 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1148 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1149 unsigned int offset
)
1151 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1152 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1153 return pskb_may_pull(skb
, hlen
) ? skb
->data
+ offset
: NULL
;
1156 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1158 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1161 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1163 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1164 skb_network_offset(skb
);
1167 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1168 unsigned short type
,
1169 const void *daddr
, const void *saddr
,
1172 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1175 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1178 static inline int dev_parse_header(const struct sk_buff
*skb
,
1179 unsigned char *haddr
)
1181 const struct net_device
*dev
= skb
->dev
;
1183 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1185 return dev
->header_ops
->parse(skb
, haddr
);
1188 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1189 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1190 static inline int unregister_gifconf(unsigned int family
)
1192 return register_gifconf(family
, NULL
);
1196 * Incoming packets are placed on per-cpu queues so that
1197 * no locking is needed.
1201 struct Qdisc
*output_queue
;
1202 struct sk_buff_head input_pkt_queue
;
1203 struct list_head poll_list
;
1204 struct sk_buff
*completion_queue
;
1206 struct napi_struct backlog
;
1209 DECLARE_PER_CPU(struct softnet_data
,softnet_data
);
1211 #define HAVE_NETIF_QUEUE
1213 extern void __netif_schedule(struct Qdisc
*q
);
1215 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1217 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1218 __netif_schedule(txq
->qdisc
);
1221 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1225 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1226 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1229 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1231 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1235 * netif_start_queue - allow transmit
1236 * @dev: network device
1238 * Allow upper layers to call the device hard_start_xmit routine.
1240 static inline void netif_start_queue(struct net_device
*dev
)
1242 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1245 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1249 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1250 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1251 netif_tx_start_queue(txq
);
1255 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1257 #ifdef CONFIG_NETPOLL_TRAP
1258 if (netpoll_trap()) {
1259 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1263 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1264 __netif_schedule(dev_queue
->qdisc
);
1268 * netif_wake_queue - restart transmit
1269 * @dev: network device
1271 * Allow upper layers to call the device hard_start_xmit routine.
1272 * Used for flow control when transmit resources are available.
1274 static inline void netif_wake_queue(struct net_device
*dev
)
1276 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1279 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1283 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1284 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1285 netif_tx_wake_queue(txq
);
1289 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1291 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1295 * netif_stop_queue - stop transmitted packets
1296 * @dev: network device
1298 * Stop upper layers calling the device hard_start_xmit routine.
1299 * Used for flow control when transmit resources are unavailable.
1301 static inline void netif_stop_queue(struct net_device
*dev
)
1303 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1306 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1310 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1311 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1312 netif_tx_stop_queue(txq
);
1316 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1318 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1322 * netif_queue_stopped - test if transmit queue is flowblocked
1323 * @dev: network device
1325 * Test if transmit queue on device is currently unable to send.
1327 static inline int netif_queue_stopped(const struct net_device
*dev
)
1329 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1332 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1334 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1338 * netif_running - test if up
1339 * @dev: network device
1341 * Test if the device has been brought up.
1343 static inline int netif_running(const struct net_device
*dev
)
1345 return test_bit(__LINK_STATE_START
, &dev
->state
);
1349 * Routines to manage the subqueues on a device. We only need start
1350 * stop, and a check if it's stopped. All other device management is
1351 * done at the overall netdevice level.
1352 * Also test the device if we're multiqueue.
1356 * netif_start_subqueue - allow sending packets on subqueue
1357 * @dev: network device
1358 * @queue_index: sub queue index
1360 * Start individual transmit queue of a device with multiple transmit queues.
1362 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1364 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1365 clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
);
1369 * netif_stop_subqueue - stop sending packets on subqueue
1370 * @dev: network device
1371 * @queue_index: sub queue index
1373 * Stop individual transmit queue of a device with multiple transmit queues.
1375 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1377 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1378 #ifdef CONFIG_NETPOLL_TRAP
1382 set_bit(__QUEUE_STATE_XOFF
, &txq
->state
);
1386 * netif_subqueue_stopped - test status of subqueue
1387 * @dev: network device
1388 * @queue_index: sub queue index
1390 * Check individual transmit queue of a device with multiple transmit queues.
1392 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1395 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1396 return test_bit(__QUEUE_STATE_XOFF
, &txq
->state
);
1399 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1400 struct sk_buff
*skb
)
1402 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1406 * netif_wake_subqueue - allow sending packets on subqueue
1407 * @dev: network device
1408 * @queue_index: sub queue index
1410 * Resume individual transmit queue of a device with multiple transmit queues.
1412 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1414 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1415 #ifdef CONFIG_NETPOLL_TRAP
1419 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1420 __netif_schedule(txq
->qdisc
);
1424 * netif_is_multiqueue - test if device has multiple transmit queues
1425 * @dev: network device
1427 * Check if device has multiple transmit queues
1429 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1431 return (dev
->num_tx_queues
> 1);
1434 /* Use this variant when it is known for sure that it
1435 * is executing from hardware interrupt context or with hardware interrupts
1438 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1440 /* Use this variant in places where it could be invoked
1441 * from either hardware interrupt or other context, with hardware interrupts
1442 * either disabled or enabled.
1444 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1446 #define HAVE_NETIF_RX 1
1447 extern int netif_rx(struct sk_buff
*skb
);
1448 extern int netif_rx_ni(struct sk_buff
*skb
);
1449 #define HAVE_NETIF_RECEIVE_SKB 1
1450 extern int netif_receive_skb(struct sk_buff
*skb
);
1451 extern void napi_gro_flush(struct napi_struct
*napi
);
1452 extern int dev_gro_receive(struct napi_struct
*napi
,
1453 struct sk_buff
*skb
);
1454 extern int napi_skb_finish(int ret
, struct sk_buff
*skb
);
1455 extern int napi_gro_receive(struct napi_struct
*napi
,
1456 struct sk_buff
*skb
);
1457 extern void napi_reuse_skb(struct napi_struct
*napi
,
1458 struct sk_buff
*skb
);
1459 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1460 extern int napi_frags_finish(struct napi_struct
*napi
,
1461 struct sk_buff
*skb
, int ret
);
1462 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1463 extern int napi_gro_frags(struct napi_struct
*napi
);
1465 static inline void napi_free_frags(struct napi_struct
*napi
)
1467 kfree_skb(napi
->skb
);
1471 extern void netif_nit_deliver(struct sk_buff
*skb
);
1472 extern int dev_valid_name(const char *name
);
1473 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1474 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1475 extern unsigned dev_get_flags(const struct net_device
*);
1476 extern int dev_change_flags(struct net_device
*, unsigned);
1477 extern int dev_change_name(struct net_device
*, const char *);
1478 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1479 extern int dev_change_net_namespace(struct net_device
*,
1480 struct net
*, const char *);
1481 extern int dev_set_mtu(struct net_device
*, int);
1482 extern int dev_set_mac_address(struct net_device
*,
1484 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1485 struct net_device
*dev
,
1486 struct netdev_queue
*txq
);
1488 extern int netdev_budget
;
1490 /* Called by rtnetlink.c:rtnl_unlock() */
1491 extern void netdev_run_todo(void);
1494 * dev_put - release reference to device
1495 * @dev: network device
1497 * Release reference to device to allow it to be freed.
1499 static inline void dev_put(struct net_device
*dev
)
1501 atomic_dec(&dev
->refcnt
);
1505 * dev_hold - get reference to device
1506 * @dev: network device
1508 * Hold reference to device to keep it from being freed.
1510 static inline void dev_hold(struct net_device
*dev
)
1512 atomic_inc(&dev
->refcnt
);
1515 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1516 * and _off may be called from IRQ context, but it is caller
1517 * who is responsible for serialization of these calls.
1519 * The name carrier is inappropriate, these functions should really be
1520 * called netif_lowerlayer_*() because they represent the state of any
1521 * kind of lower layer not just hardware media.
1524 extern void linkwatch_fire_event(struct net_device
*dev
);
1527 * netif_carrier_ok - test if carrier present
1528 * @dev: network device
1530 * Check if carrier is present on device
1532 static inline int netif_carrier_ok(const struct net_device
*dev
)
1534 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1537 extern unsigned long dev_trans_start(struct net_device
*dev
);
1539 extern void __netdev_watchdog_up(struct net_device
*dev
);
1541 extern void netif_carrier_on(struct net_device
*dev
);
1543 extern void netif_carrier_off(struct net_device
*dev
);
1546 * netif_dormant_on - mark device as dormant.
1547 * @dev: network device
1549 * Mark device as dormant (as per RFC2863).
1551 * The dormant state indicates that the relevant interface is not
1552 * actually in a condition to pass packets (i.e., it is not 'up') but is
1553 * in a "pending" state, waiting for some external event. For "on-
1554 * demand" interfaces, this new state identifies the situation where the
1555 * interface is waiting for events to place it in the up state.
1558 static inline void netif_dormant_on(struct net_device
*dev
)
1560 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1561 linkwatch_fire_event(dev
);
1565 * netif_dormant_off - set device as not dormant.
1566 * @dev: network device
1568 * Device is not in dormant state.
1570 static inline void netif_dormant_off(struct net_device
*dev
)
1572 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1573 linkwatch_fire_event(dev
);
1577 * netif_dormant - test if carrier present
1578 * @dev: network device
1580 * Check if carrier is present on device
1582 static inline int netif_dormant(const struct net_device
*dev
)
1584 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1589 * netif_oper_up - test if device is operational
1590 * @dev: network device
1592 * Check if carrier is operational
1594 static inline int netif_oper_up(const struct net_device
*dev
) {
1595 return (dev
->operstate
== IF_OPER_UP
||
1596 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1600 * netif_device_present - is device available or removed
1601 * @dev: network device
1603 * Check if device has not been removed from system.
1605 static inline int netif_device_present(struct net_device
*dev
)
1607 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1610 extern void netif_device_detach(struct net_device
*dev
);
1612 extern void netif_device_attach(struct net_device
*dev
);
1615 * Network interface message level settings
1617 #define HAVE_NETIF_MSG 1
1620 NETIF_MSG_DRV
= 0x0001,
1621 NETIF_MSG_PROBE
= 0x0002,
1622 NETIF_MSG_LINK
= 0x0004,
1623 NETIF_MSG_TIMER
= 0x0008,
1624 NETIF_MSG_IFDOWN
= 0x0010,
1625 NETIF_MSG_IFUP
= 0x0020,
1626 NETIF_MSG_RX_ERR
= 0x0040,
1627 NETIF_MSG_TX_ERR
= 0x0080,
1628 NETIF_MSG_TX_QUEUED
= 0x0100,
1629 NETIF_MSG_INTR
= 0x0200,
1630 NETIF_MSG_TX_DONE
= 0x0400,
1631 NETIF_MSG_RX_STATUS
= 0x0800,
1632 NETIF_MSG_PKTDATA
= 0x1000,
1633 NETIF_MSG_HW
= 0x2000,
1634 NETIF_MSG_WOL
= 0x4000,
1637 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1638 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1639 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1640 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1641 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1642 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1643 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1644 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1645 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1646 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1647 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1648 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1649 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1650 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1651 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1653 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1656 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1657 return default_msg_enable_bits
;
1658 if (debug_value
== 0) /* no output */
1660 /* set low N bits */
1661 return (1 << debug_value
) - 1;
1664 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1666 spin_lock(&txq
->_xmit_lock
);
1667 txq
->xmit_lock_owner
= cpu
;
1670 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1672 spin_lock_bh(&txq
->_xmit_lock
);
1673 txq
->xmit_lock_owner
= smp_processor_id();
1676 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1678 int ok
= spin_trylock(&txq
->_xmit_lock
);
1680 txq
->xmit_lock_owner
= smp_processor_id();
1684 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1686 txq
->xmit_lock_owner
= -1;
1687 spin_unlock(&txq
->_xmit_lock
);
1690 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
1692 txq
->xmit_lock_owner
= -1;
1693 spin_unlock_bh(&txq
->_xmit_lock
);
1696 static inline void txq_trans_update(struct netdev_queue
*txq
)
1698 if (txq
->xmit_lock_owner
!= -1)
1699 txq
->trans_start
= jiffies
;
1703 * netif_tx_lock - grab network device transmit lock
1704 * @dev: network device
1706 * Get network device transmit lock
1708 static inline void netif_tx_lock(struct net_device
*dev
)
1713 spin_lock(&dev
->tx_global_lock
);
1714 cpu
= smp_processor_id();
1715 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1716 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1718 /* We are the only thread of execution doing a
1719 * freeze, but we have to grab the _xmit_lock in
1720 * order to synchronize with threads which are in
1721 * the ->hard_start_xmit() handler and already
1722 * checked the frozen bit.
1724 __netif_tx_lock(txq
, cpu
);
1725 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1726 __netif_tx_unlock(txq
);
1730 static inline void netif_tx_lock_bh(struct net_device
*dev
)
1736 static inline void netif_tx_unlock(struct net_device
*dev
)
1740 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1741 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1743 /* No need to grab the _xmit_lock here. If the
1744 * queue is not stopped for another reason, we
1747 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1748 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1749 __netif_schedule(txq
->qdisc
);
1751 spin_unlock(&dev
->tx_global_lock
);
1754 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
1756 netif_tx_unlock(dev
);
1760 #define HARD_TX_LOCK(dev, txq, cpu) { \
1761 if ((dev->features & NETIF_F_LLTX) == 0) { \
1762 __netif_tx_lock(txq, cpu); \
1766 #define HARD_TX_UNLOCK(dev, txq) { \
1767 if ((dev->features & NETIF_F_LLTX) == 0) { \
1768 __netif_tx_unlock(txq); \
1772 static inline void netif_tx_disable(struct net_device
*dev
)
1778 cpu
= smp_processor_id();
1779 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1780 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1782 __netif_tx_lock(txq
, cpu
);
1783 netif_tx_stop_queue(txq
);
1784 __netif_tx_unlock(txq
);
1789 static inline void netif_addr_lock(struct net_device
*dev
)
1791 spin_lock(&dev
->addr_list_lock
);
1794 static inline void netif_addr_lock_bh(struct net_device
*dev
)
1796 spin_lock_bh(&dev
->addr_list_lock
);
1799 static inline void netif_addr_unlock(struct net_device
*dev
)
1801 spin_unlock(&dev
->addr_list_lock
);
1804 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
1806 spin_unlock_bh(&dev
->addr_list_lock
);
1810 * dev_addrs walker. Should be used only for read access. Call with
1811 * rcu_read_lock held.
1813 #define for_each_dev_addr(dev, ha) \
1814 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1816 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1818 extern void ether_setup(struct net_device
*dev
);
1820 /* Support for loadable net-drivers */
1821 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
1822 void (*setup
)(struct net_device
*),
1823 unsigned int queue_count
);
1824 #define alloc_netdev(sizeof_priv, name, setup) \
1825 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1826 extern int register_netdev(struct net_device
*dev
);
1827 extern void unregister_netdev(struct net_device
*dev
);
1829 /* Functions used for device addresses handling */
1830 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
1831 unsigned char addr_type
);
1832 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
1833 unsigned char addr_type
);
1834 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
1835 struct net_device
*from_dev
,
1836 unsigned char addr_type
);
1837 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
1838 struct net_device
*from_dev
,
1839 unsigned char addr_type
);
1841 /* Functions used for secondary unicast and multicast support */
1842 extern void dev_set_rx_mode(struct net_device
*dev
);
1843 extern void __dev_set_rx_mode(struct net_device
*dev
);
1844 extern int dev_unicast_delete(struct net_device
*dev
, void *addr
);
1845 extern int dev_unicast_add(struct net_device
*dev
, void *addr
);
1846 extern int dev_unicast_sync(struct net_device
*to
, struct net_device
*from
);
1847 extern void dev_unicast_unsync(struct net_device
*to
, struct net_device
*from
);
1848 extern int dev_mc_delete(struct net_device
*dev
, void *addr
, int alen
, int all
);
1849 extern int dev_mc_add(struct net_device
*dev
, void *addr
, int alen
, int newonly
);
1850 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
1851 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
1852 extern int __dev_addr_delete(struct dev_addr_list
**list
, int *count
, void *addr
, int alen
, int all
);
1853 extern int __dev_addr_add(struct dev_addr_list
**list
, int *count
, void *addr
, int alen
, int newonly
);
1854 extern int __dev_addr_sync(struct dev_addr_list
**to
, int *to_count
, struct dev_addr_list
**from
, int *from_count
);
1855 extern void __dev_addr_unsync(struct dev_addr_list
**to
, int *to_count
, struct dev_addr_list
**from
, int *from_count
);
1856 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
1857 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
1858 extern void netdev_state_change(struct net_device
*dev
);
1859 extern void netdev_bonding_change(struct net_device
*dev
);
1860 extern void netdev_features_change(struct net_device
*dev
);
1861 /* Load a device via the kmod */
1862 extern void dev_load(struct net
*net
, const char *name
);
1863 extern void dev_mcast_init(void);
1864 extern const struct net_device_stats
*dev_get_stats(struct net_device
*dev
);
1866 extern int netdev_max_backlog
;
1867 extern int weight_p
;
1868 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
1869 extern int skb_checksum_help(struct sk_buff
*skb
);
1870 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
1872 extern void netdev_rx_csum_fault(struct net_device
*dev
);
1874 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
1878 /* rx skb timestamps */
1879 extern void net_enable_timestamp(void);
1880 extern void net_disable_timestamp(void);
1882 #ifdef CONFIG_PROC_FS
1883 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
1884 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
1885 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
1888 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
1889 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
1891 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
1893 extern void linkwatch_run_queue(void);
1895 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
1896 unsigned long mask
);
1897 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
1899 static inline int net_gso_ok(int features
, int gso_type
)
1901 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
1902 return (features
& feature
) == feature
;
1905 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
1907 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
1908 (!skb_has_frags(skb
) || (features
& NETIF_F_FRAGLIST
));
1911 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
1913 return skb_is_gso(skb
) &&
1914 (!skb_gso_ok(skb
, dev
->features
) ||
1915 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
1918 static inline void netif_set_gso_max_size(struct net_device
*dev
,
1921 dev
->gso_max_size
= size
;
1924 static inline void skb_bond_set_mac_by_master(struct sk_buff
*skb
,
1925 struct net_device
*master
)
1927 if (skb
->pkt_type
== PACKET_HOST
) {
1928 u16
*dest
= (u16
*) eth_hdr(skb
)->h_dest
;
1930 memcpy(dest
, master
->dev_addr
, ETH_ALEN
);
1934 /* On bonding slaves other than the currently active slave, suppress
1935 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1936 * ARP on active-backup slaves with arp_validate enabled.
1938 static inline int skb_bond_should_drop(struct sk_buff
*skb
)
1940 struct net_device
*dev
= skb
->dev
;
1941 struct net_device
*master
= dev
->master
;
1944 if (master
->priv_flags
& IFF_MASTER_ARPMON
)
1945 dev
->last_rx
= jiffies
;
1947 if ((master
->priv_flags
& IFF_MASTER_ALB
) && master
->br_port
) {
1948 /* Do address unmangle. The local destination address
1949 * will be always the one master has. Provides the right
1950 * functionality in a bridge.
1952 skb_bond_set_mac_by_master(skb
, master
);
1955 if (dev
->priv_flags
& IFF_SLAVE_INACTIVE
) {
1956 if ((dev
->priv_flags
& IFF_SLAVE_NEEDARP
) &&
1957 skb
->protocol
== __cpu_to_be16(ETH_P_ARP
))
1960 if (master
->priv_flags
& IFF_MASTER_ALB
) {
1961 if (skb
->pkt_type
!= PACKET_BROADCAST
&&
1962 skb
->pkt_type
!= PACKET_MULTICAST
)
1965 if (master
->priv_flags
& IFF_MASTER_8023AD
&&
1966 skb
->protocol
== __cpu_to_be16(ETH_P_SLOW
))
1975 extern struct pernet_operations __net_initdata loopback_net_ops
;
1977 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
1978 struct ethtool_cmd
*cmd
)
1980 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
1982 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
1985 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
1987 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
1989 return dev
->ethtool_ops
->get_rx_csum(dev
);
1992 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
1994 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
1996 return dev
->ethtool_ops
->get_flags(dev
);
1998 #endif /* __KERNEL__ */
2000 #endif /* _LINUX_NETDEVICE_H */