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>
31 #include <linux/if_link.h>
34 #include <linux/timer.h>
35 #include <linux/delay.h>
37 #include <asm/atomic.h>
38 #include <asm/cache.h>
39 #include <asm/byteorder.h>
41 #include <linux/device.h>
42 #include <linux/percpu.h>
43 #include <linux/rculist.h>
44 #include <linux/dmaengine.h>
45 #include <linux/workqueue.h>
47 #include <linux/ethtool.h>
48 #include <net/net_namespace.h>
51 #include <net/dcbnl.h>
58 /* source back-compat hooks */
59 #define SET_ETHTOOL_OPS(netdev,ops) \
60 ( (netdev)->ethtool_ops = (ops) )
62 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
63 functions are available. */
64 #define HAVE_FREE_NETDEV /* free_netdev() */
65 #define HAVE_NETDEV_PRIV /* netdev_priv() */
67 /* Backlog congestion levels */
68 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
69 #define NET_RX_DROP 1 /* packet dropped */
72 * Transmit return codes: transmit return codes originate from three different
75 * - qdisc return codes
76 * - driver transmit return codes
79 * Drivers are allowed to return any one of those in their hard_start_xmit()
80 * function. Real network devices commonly used with qdiscs should only return
81 * the driver transmit return codes though - when qdiscs are used, the actual
82 * transmission happens asynchronously, so the value is not propagated to
83 * higher layers. Virtual network devices transmit synchronously, in this case
84 * the driver transmit return codes are consumed by dev_queue_xmit(), all
85 * others are propagated to higher layers.
88 /* qdisc ->enqueue() return codes. */
89 #define NET_XMIT_SUCCESS 0x00
90 #define NET_XMIT_DROP 0x01 /* skb dropped */
91 #define NET_XMIT_CN 0x02 /* congestion notification */
92 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
93 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
95 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
96 * indicates that the device will soon be dropping packets, or already drops
97 * some packets of the same priority; prompting us to send less aggressively. */
98 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
99 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
101 /* Driver transmit return codes */
102 #define NETDEV_TX_MASK 0xf0
105 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
106 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
107 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
108 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
110 typedef enum netdev_tx netdev_tx_t
;
113 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
114 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
116 static inline bool dev_xmit_complete(int rc
)
119 * Positive cases with an skb consumed by a driver:
120 * - successful transmission (rc == NETDEV_TX_OK)
121 * - error while transmitting (rc < 0)
122 * - error while queueing to a different device (rc & NET_XMIT_MASK)
124 if (likely(rc
< NET_XMIT_MASK
))
132 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
136 * Compute the worst case header length according to the protocols
140 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
141 # if defined(CONFIG_MAC80211_MESH)
142 # define LL_MAX_HEADER 128
144 # define LL_MAX_HEADER 96
146 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
147 # define LL_MAX_HEADER 48
149 # define LL_MAX_HEADER 32
152 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
153 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
154 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
155 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
156 #define MAX_HEADER LL_MAX_HEADER
158 #define MAX_HEADER (LL_MAX_HEADER + 48)
161 #endif /* __KERNEL__ */
164 * Network device statistics. Akin to the 2.0 ether stats but
165 * with byte counters.
168 struct net_device_stats
{
169 unsigned long rx_packets
; /* total packets received */
170 unsigned long tx_packets
; /* total packets transmitted */
171 unsigned long rx_bytes
; /* total bytes received */
172 unsigned long tx_bytes
; /* total bytes transmitted */
173 unsigned long rx_errors
; /* bad packets received */
174 unsigned long tx_errors
; /* packet transmit problems */
175 unsigned long rx_dropped
; /* no space in linux buffers */
176 unsigned long tx_dropped
; /* no space available in linux */
177 unsigned long multicast
; /* multicast packets received */
178 unsigned long collisions
;
180 /* detailed rx_errors: */
181 unsigned long rx_length_errors
;
182 unsigned long rx_over_errors
; /* receiver ring buff overflow */
183 unsigned long rx_crc_errors
; /* recved pkt with crc error */
184 unsigned long rx_frame_errors
; /* recv'd frame alignment error */
185 unsigned long rx_fifo_errors
; /* recv'r fifo overrun */
186 unsigned long rx_missed_errors
; /* receiver missed packet */
188 /* detailed tx_errors */
189 unsigned long tx_aborted_errors
;
190 unsigned long tx_carrier_errors
;
191 unsigned long tx_fifo_errors
;
192 unsigned long tx_heartbeat_errors
;
193 unsigned long tx_window_errors
;
196 unsigned long rx_compressed
;
197 unsigned long tx_compressed
;
201 /* Media selection options. */
214 #include <linux/cache.h>
215 #include <linux/skbuff.h>
221 struct netif_rx_stats
{
224 unsigned time_squeeze
;
225 unsigned cpu_collision
;
226 unsigned received_rps
;
229 DECLARE_PER_CPU(struct netif_rx_stats
, netdev_rx_stat
);
231 struct netdev_hw_addr
{
232 struct list_head list
;
233 unsigned char addr
[MAX_ADDR_LEN
];
235 #define NETDEV_HW_ADDR_T_LAN 1
236 #define NETDEV_HW_ADDR_T_SAN 2
237 #define NETDEV_HW_ADDR_T_SLAVE 3
238 #define NETDEV_HW_ADDR_T_UNICAST 4
239 #define NETDEV_HW_ADDR_T_MULTICAST 5
243 struct rcu_head rcu_head
;
246 struct netdev_hw_addr_list
{
247 struct list_head list
;
251 #define netdev_hw_addr_list_count(l) ((l)->count)
252 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
253 #define netdev_hw_addr_list_for_each(ha, l) \
254 list_for_each_entry(ha, &(l)->list, list)
256 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
257 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
258 #define netdev_for_each_uc_addr(ha, dev) \
259 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
261 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
262 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
263 #define netdev_for_each_mc_addr(ha, dev) \
264 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
267 struct hh_cache
*hh_next
; /* Next entry */
268 atomic_t hh_refcnt
; /* number of users */
270 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
272 * They are mostly read, but hh_refcnt may be changed quite frequently,
273 * incurring cache line ping pongs.
275 __be16 hh_type ____cacheline_aligned_in_smp
;
276 /* protocol identifier, f.e ETH_P_IP
277 * NOTE: For VLANs, this will be the
278 * encapuslated type. --BLG
280 u16 hh_len
; /* length of header */
281 int (*hh_output
)(struct sk_buff
*skb
);
284 /* cached hardware header; allow for machine alignment needs. */
285 #define HH_DATA_MOD 16
286 #define HH_DATA_OFF(__len) \
287 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
288 #define HH_DATA_ALIGN(__len) \
289 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
290 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
293 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
295 * dev->hard_header_len ? (dev->hard_header_len +
296 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
298 * We could use other alignment values, but we must maintain the
299 * relationship HH alignment <= LL alignment.
301 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
304 #define LL_RESERVED_SPACE(dev) \
305 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
306 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
307 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308 #define LL_ALLOCATED_SPACE(dev) \
309 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
312 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
313 unsigned short type
, const void *daddr
,
314 const void *saddr
, unsigned len
);
315 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
316 int (*rebuild
)(struct sk_buff
*skb
);
317 #define HAVE_HEADER_CACHE
318 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
319 void (*cache_update
)(struct hh_cache
*hh
,
320 const struct net_device
*dev
,
321 const unsigned char *haddr
);
324 /* These flag bits are private to the generic network queueing
325 * layer, they may not be explicitly referenced by any other
329 enum netdev_state_t
{
331 __LINK_STATE_PRESENT
,
332 __LINK_STATE_NOCARRIER
,
333 __LINK_STATE_LINKWATCH_PENDING
,
334 __LINK_STATE_DORMANT
,
339 * This structure holds at boot time configured netdevice settings. They
340 * are then used in the device probing.
342 struct netdev_boot_setup
{
346 #define NETDEV_BOOT_SETUP_MAX 8
348 extern int __init
netdev_boot_setup(char *str
);
351 * Structure for NAPI scheduling similar to tasklet but with weighting
354 /* The poll_list must only be managed by the entity which
355 * changes the state of the NAPI_STATE_SCHED bit. This means
356 * whoever atomically sets that bit can add this napi_struct
357 * to the per-cpu poll_list, and whoever clears that bit
358 * can remove from the list right before clearing the bit.
360 struct list_head poll_list
;
364 int (*poll
)(struct napi_struct
*, int);
365 #ifdef CONFIG_NETPOLL
366 spinlock_t poll_lock
;
370 unsigned int gro_count
;
372 struct net_device
*dev
;
373 struct list_head dev_list
;
374 struct sk_buff
*gro_list
;
379 NAPI_STATE_SCHED
, /* Poll is scheduled */
380 NAPI_STATE_DISABLE
, /* Disable pending */
381 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
391 typedef enum gro_result gro_result_t
;
393 extern void __napi_schedule(struct napi_struct
*n
);
395 static inline int napi_disable_pending(struct napi_struct
*n
)
397 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
401 * napi_schedule_prep - check if napi can be scheduled
404 * Test if NAPI routine is already running, and if not mark
405 * it as running. This is used as a condition variable
406 * insure only one NAPI poll instance runs. We also make
407 * sure there is no pending NAPI disable.
409 static inline int napi_schedule_prep(struct napi_struct
*n
)
411 return !napi_disable_pending(n
) &&
412 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
416 * napi_schedule - schedule NAPI poll
419 * Schedule NAPI poll routine to be called if it is not already
422 static inline void napi_schedule(struct napi_struct
*n
)
424 if (napi_schedule_prep(n
))
428 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
429 static inline int napi_reschedule(struct napi_struct
*napi
)
431 if (napi_schedule_prep(napi
)) {
432 __napi_schedule(napi
);
439 * napi_complete - NAPI processing complete
442 * Mark NAPI processing as complete.
444 extern void __napi_complete(struct napi_struct
*n
);
445 extern void napi_complete(struct napi_struct
*n
);
448 * napi_disable - prevent NAPI from scheduling
451 * Stop NAPI from being scheduled on this context.
452 * Waits till any outstanding processing completes.
454 static inline void napi_disable(struct napi_struct
*n
)
456 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
457 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
459 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
463 * napi_enable - enable NAPI scheduling
466 * Resume NAPI from being scheduled on this context.
467 * Must be paired with napi_disable.
469 static inline void napi_enable(struct napi_struct
*n
)
471 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
472 smp_mb__before_clear_bit();
473 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
478 * napi_synchronize - wait until NAPI is not running
481 * Wait until NAPI is done being scheduled on this context.
482 * Waits till any outstanding processing completes but
483 * does not disable future activations.
485 static inline void napi_synchronize(const struct napi_struct
*n
)
487 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
491 # define napi_synchronize(n) barrier()
494 enum netdev_queue_state_t
{
496 __QUEUE_STATE_FROZEN
,
499 struct netdev_queue
{
503 struct net_device
*dev
;
506 struct Qdisc
*qdisc_sleeping
;
510 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
513 * please use this field instead of dev->trans_start
515 unsigned long trans_start
;
516 unsigned long tx_bytes
;
517 unsigned long tx_packets
;
518 unsigned long tx_dropped
;
519 } ____cacheline_aligned_in_smp
;
523 * This structure holds an RPS map which can be of variable length. The
524 * map is an array of CPUs.
531 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
534 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
535 * tail pointer for that CPU's input queue at the time of last enqueue.
537 struct rps_dev_flow
{
540 unsigned int last_qtail
;
544 * The rps_dev_flow_table structure contains a table of flow mappings.
546 struct rps_dev_flow_table
{
549 struct work_struct free_work
;
550 struct rps_dev_flow flows
[0];
552 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
553 (_num * sizeof(struct rps_dev_flow)))
556 * The rps_sock_flow_table contains mappings of flows to the last CPU
557 * on which they were processed by the application (set in recvmsg).
559 struct rps_sock_flow_table
{
563 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
564 (_num * sizeof(u16)))
566 #define RPS_NO_CPU 0xffff
568 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
572 unsigned int cpu
, index
= hash
& table
->mask
;
574 /* We only give a hint, preemption can change cpu under us */
575 cpu
= raw_smp_processor_id();
577 if (table
->ents
[index
] != cpu
)
578 table
->ents
[index
] = cpu
;
582 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
586 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
589 extern struct rps_sock_flow_table
*rps_sock_flow_table
;
591 /* This structure contains an instance of an RX queue. */
592 struct netdev_rx_queue
{
593 struct rps_map
*rps_map
;
594 struct rps_dev_flow_table
*rps_flow_table
;
596 struct netdev_rx_queue
*first
;
598 } ____cacheline_aligned_in_smp
;
599 #endif /* CONFIG_RPS */
602 * This structure defines the management hooks for network devices.
603 * The following hooks can be defined; unless noted otherwise, they are
604 * optional and can be filled with a null pointer.
606 * int (*ndo_init)(struct net_device *dev);
607 * This function is called once when network device is registered.
608 * The network device can use this to any late stage initializaton
609 * or semantic validattion. It can fail with an error code which will
610 * be propogated back to register_netdev
612 * void (*ndo_uninit)(struct net_device *dev);
613 * This function is called when device is unregistered or when registration
614 * fails. It is not called if init fails.
616 * int (*ndo_open)(struct net_device *dev);
617 * This function is called when network device transistions to the up
620 * int (*ndo_stop)(struct net_device *dev);
621 * This function is called when network device transistions to the down
624 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
625 * struct net_device *dev);
626 * Called when a packet needs to be transmitted.
627 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
628 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
629 * Required can not be NULL.
631 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
632 * Called to decide which queue to when device supports multiple
635 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
636 * This function is called to allow device receiver to make
637 * changes to configuration when multicast or promiscious is enabled.
639 * void (*ndo_set_rx_mode)(struct net_device *dev);
640 * This function is called device changes address list filtering.
642 * void (*ndo_set_multicast_list)(struct net_device *dev);
643 * This function is called when the multicast address list changes.
645 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
646 * This function is called when the Media Access Control address
647 * needs to be changed. If this interface is not defined, the
648 * mac address can not be changed.
650 * int (*ndo_validate_addr)(struct net_device *dev);
651 * Test if Media Access Control address is valid for the device.
653 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
654 * Called when a user request an ioctl which can't be handled by
655 * the generic interface code. If not defined ioctl's return
656 * not supported error code.
658 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
659 * Used to set network devices bus interface parameters. This interface
660 * is retained for legacy reason, new devices should use the bus
661 * interface (PCI) for low level management.
663 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
664 * Called when a user wants to change the Maximum Transfer Unit
665 * of a device. If not defined, any request to change MTU will
666 * will return an error.
668 * void (*ndo_tx_timeout)(struct net_device *dev);
669 * Callback uses when the transmitter has not made any progress
670 * for dev->watchdog ticks.
672 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
673 * Called when a user wants to get the network device usage
674 * statistics. If not defined, the counters in dev->stats will
677 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
678 * If device support VLAN receive accleration
679 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
680 * when vlan groups for the device changes. Note: grp is NULL
681 * if no vlan's groups are being used.
683 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
684 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
685 * this function is called when a VLAN id is registered.
687 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
688 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
689 * this function is called when a VLAN id is unregistered.
691 * void (*ndo_poll_controller)(struct net_device *dev);
693 * SR-IOV management functions.
694 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
695 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
696 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
697 * int (*ndo_get_vf_config)(struct net_device *dev,
698 * int vf, struct ifla_vf_info *ivf);
700 #define HAVE_NET_DEVICE_OPS
701 struct net_device_ops
{
702 int (*ndo_init
)(struct net_device
*dev
);
703 void (*ndo_uninit
)(struct net_device
*dev
);
704 int (*ndo_open
)(struct net_device
*dev
);
705 int (*ndo_stop
)(struct net_device
*dev
);
706 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
707 struct net_device
*dev
);
708 u16 (*ndo_select_queue
)(struct net_device
*dev
,
709 struct sk_buff
*skb
);
710 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
712 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
713 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
714 int (*ndo_set_mac_address
)(struct net_device
*dev
,
716 int (*ndo_validate_addr
)(struct net_device
*dev
);
717 int (*ndo_do_ioctl
)(struct net_device
*dev
,
718 struct ifreq
*ifr
, int cmd
);
719 int (*ndo_set_config
)(struct net_device
*dev
,
721 int (*ndo_change_mtu
)(struct net_device
*dev
,
723 int (*ndo_neigh_setup
)(struct net_device
*dev
,
724 struct neigh_parms
*);
725 void (*ndo_tx_timeout
) (struct net_device
*dev
);
727 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
729 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
730 struct vlan_group
*grp
);
731 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
733 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
735 #ifdef CONFIG_NET_POLL_CONTROLLER
736 void (*ndo_poll_controller
)(struct net_device
*dev
);
738 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
740 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
741 int queue
, u16 vlan
, u8 qos
);
742 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
744 int (*ndo_get_vf_config
)(struct net_device
*dev
,
746 struct ifla_vf_info
*ivf
);
747 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
748 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
749 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
750 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
752 struct scatterlist
*sgl
,
754 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
756 #define NETDEV_FCOE_WWNN 0
757 #define NETDEV_FCOE_WWPN 1
758 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
764 * The DEVICE structure.
765 * Actually, this whole structure is a big mistake. It mixes I/O
766 * data with strictly "high-level" data, and it has to know about
767 * almost every data structure used in the INET module.
769 * FIXME: cleanup struct net_device such that network protocol info
776 * This is the first field of the "visible" part of this structure
777 * (i.e. as seen by users in the "Space.c" file). It is the name
781 /* device name hash chain */
782 struct hlist_node name_hlist
;
787 * I/O specific fields
788 * FIXME: Merge these and struct ifmap into one
790 unsigned long mem_end
; /* shared mem end */
791 unsigned long mem_start
; /* shared mem start */
792 unsigned long base_addr
; /* device I/O address */
793 unsigned int irq
; /* device IRQ number */
796 * Some hardware also needs these fields, but they are not
797 * part of the usual set specified in Space.c.
800 unsigned char if_port
; /* Selectable AUI, TP,..*/
801 unsigned char dma
; /* DMA channel */
805 struct list_head dev_list
;
806 struct list_head napi_list
;
807 struct list_head unreg_list
;
809 /* Net device features */
810 unsigned long features
;
811 #define NETIF_F_SG 1 /* Scatter/gather IO. */
812 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
813 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
814 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
815 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
816 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
817 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
818 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
819 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
820 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
821 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
822 #define NETIF_F_GSO 2048 /* Enable software GSO. */
823 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
824 /* do not use LLTX in new drivers */
825 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
826 #define NETIF_F_GRO 16384 /* Generic receive offload */
827 #define NETIF_F_LRO 32768 /* large receive offload */
829 /* the GSO_MASK reserves bits 16 through 23 */
830 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
831 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
832 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
833 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
834 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
836 /* Segmentation offload features */
837 #define NETIF_F_GSO_SHIFT 16
838 #define NETIF_F_GSO_MASK 0x00ff0000
839 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
840 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
841 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
842 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
843 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
844 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
846 /* List of features with software fallbacks. */
847 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
850 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
851 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
852 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
853 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
856 * If one device supports one of these features, then enable them
857 * for all in netdev_increment_features.
859 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
860 NETIF_F_SG | NETIF_F_HIGHDMA | \
863 /* Interface index. Unique device identifier */
867 struct net_device_stats stats
;
869 #ifdef CONFIG_WIRELESS_EXT
870 /* List of functions to handle Wireless Extensions (instead of ioctl).
871 * See <net/iw_handler.h> for details. Jean II */
872 const struct iw_handler_def
* wireless_handlers
;
873 /* Instance data managed by the core of Wireless Extensions. */
874 struct iw_public_data
* wireless_data
;
876 /* Management operations */
877 const struct net_device_ops
*netdev_ops
;
878 const struct ethtool_ops
*ethtool_ops
;
880 /* Hardware header description */
881 const struct header_ops
*header_ops
;
883 unsigned int flags
; /* interface flags (a la BSD) */
884 unsigned short gflags
;
885 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
886 unsigned short padded
; /* How much padding added by alloc_netdev() */
888 unsigned char operstate
; /* RFC2863 operstate */
889 unsigned char link_mode
; /* mapping policy to operstate */
891 unsigned mtu
; /* interface MTU value */
892 unsigned short type
; /* interface hardware type */
893 unsigned short hard_header_len
; /* hardware hdr length */
895 /* extra head- and tailroom the hardware may need, but not in all cases
896 * can this be guaranteed, especially tailroom. Some cases also use
897 * LL_MAX_HEADER instead to allocate the skb.
899 unsigned short needed_headroom
;
900 unsigned short needed_tailroom
;
902 struct net_device
*master
; /* Pointer to master device of a group,
903 * which this device is member of.
906 /* Interface address info. */
907 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
908 unsigned char addr_len
; /* hardware address length */
909 unsigned short dev_id
; /* for shared network cards */
911 spinlock_t addr_list_lock
;
912 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
913 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
915 unsigned int promiscuity
;
916 unsigned int allmulti
;
919 /* Protocol specific pointers */
921 #ifdef CONFIG_NET_DSA
922 void *dsa_ptr
; /* dsa specific data */
924 void *atalk_ptr
; /* AppleTalk link */
925 void *ip_ptr
; /* IPv4 specific data */
926 void *dn_ptr
; /* DECnet specific data */
927 void *ip6_ptr
; /* IPv6 specific data */
928 void *ec_ptr
; /* Econet specific data */
929 void *ax25_ptr
; /* AX.25 specific data */
930 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
931 assign before registering */
934 * Cache line mostly used on receive path (including eth_type_trans())
936 unsigned long last_rx
; /* Time of last Rx */
937 /* Interface address info used in eth_type_trans() */
938 unsigned char *dev_addr
; /* hw address, (before bcast
939 because most packets are
942 struct netdev_hw_addr_list dev_addrs
; /* list of device
945 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
948 struct kset
*queues_kset
;
950 struct netdev_rx_queue
*_rx
;
952 /* Number of RX queues allocated at alloc_netdev_mq() time */
953 unsigned int num_rx_queues
;
956 struct netdev_queue rx_queue
;
958 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
960 /* Number of TX queues allocated at alloc_netdev_mq() time */
961 unsigned int num_tx_queues
;
963 /* Number of TX queues currently active in device */
964 unsigned int real_num_tx_queues
;
966 /* root qdisc from userspace point of view */
969 unsigned long tx_queue_len
; /* Max frames per queue allowed */
970 spinlock_t tx_global_lock
;
972 * One part is mostly used on xmit path (device)
974 /* These may be needed for future network-power-down code. */
977 * trans_start here is expensive for high speed devices on SMP,
978 * please use netdev_queue->trans_start instead.
980 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
982 int watchdog_timeo
; /* used by dev_watchdog() */
983 struct timer_list watchdog_timer
;
985 /* Number of references to this device */
986 atomic_t refcnt ____cacheline_aligned_in_smp
;
988 /* delayed register/unregister */
989 struct list_head todo_list
;
990 /* device index hash chain */
991 struct hlist_node index_hlist
;
993 struct list_head link_watch_list
;
995 /* register/unregister state machine */
996 enum { NETREG_UNINITIALIZED
=0,
997 NETREG_REGISTERED
, /* completed register_netdevice */
998 NETREG_UNREGISTERING
, /* called unregister_netdevice */
999 NETREG_UNREGISTERED
, /* completed unregister todo */
1000 NETREG_RELEASED
, /* called free_netdev */
1001 NETREG_DUMMY
, /* dummy device for NAPI poll */
1005 RTNL_LINK_INITIALIZED
,
1006 RTNL_LINK_INITIALIZING
,
1007 } rtnl_link_state
:16;
1009 /* Called from unregister, can be used to call free_netdev */
1010 void (*destructor
)(struct net_device
*dev
);
1012 #ifdef CONFIG_NETPOLL
1013 struct netpoll_info
*npinfo
;
1016 #ifdef CONFIG_NET_NS
1017 /* Network namespace this network device is inside */
1021 /* mid-layer private */
1025 struct net_bridge_port
*br_port
;
1027 struct macvlan_port
*macvlan_port
;
1029 struct garp_port
*garp_port
;
1031 /* class/net/name entry */
1033 /* space for optional device, statistics, and wireless sysfs groups */
1034 const struct attribute_group
*sysfs_groups
[4];
1036 /* rtnetlink link ops */
1037 const struct rtnl_link_ops
*rtnl_link_ops
;
1039 /* VLAN feature mask */
1040 unsigned long vlan_features
;
1042 /* for setting kernel sock attribute on TCP connection setup */
1043 #define GSO_MAX_SIZE 65536
1044 unsigned int gso_max_size
;
1047 /* Data Center Bridging netlink ops */
1048 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1051 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1052 /* max exchange id for FCoE LRO by ddp */
1053 unsigned int fcoe_ddp_xid
;
1055 /* n-tuple filter list attached to this device */
1056 struct ethtool_rx_ntuple_list ethtool_ntuple_list
;
1058 #define to_net_dev(d) container_of(d, struct net_device, dev)
1060 #define NETDEV_ALIGN 32
1063 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1066 return &dev
->_tx
[index
];
1069 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1070 void (*f
)(struct net_device
*,
1071 struct netdev_queue
*,
1077 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1078 f(dev
, &dev
->_tx
[i
], arg
);
1082 * Net namespace inlines
1085 struct net
*dev_net(const struct net_device
*dev
)
1087 #ifdef CONFIG_NET_NS
1095 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1097 #ifdef CONFIG_NET_NS
1098 release_net(dev
->nd_net
);
1099 dev
->nd_net
= hold_net(net
);
1103 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1105 #ifdef CONFIG_NET_DSA_TAG_DSA
1106 if (dev
->dsa_ptr
!= NULL
)
1107 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1113 #ifndef CONFIG_NET_NS
1114 static inline void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
)
1118 #else /* CONFIG_NET_NS */
1119 void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
);
1122 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1124 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1125 if (dev
->dsa_ptr
!= NULL
)
1126 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1133 * netdev_priv - access network device private data
1134 * @dev: network device
1136 * Get network device private data
1138 static inline void *netdev_priv(const struct net_device
*dev
)
1140 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1143 /* Set the sysfs physical device reference for the network logical device
1144 * if set prior to registration will cause a symlink during initialization.
1146 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1148 /* Set the sysfs device type for the network logical device to allow
1149 * fin grained indentification of different network device types. For
1150 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1152 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1155 * netif_napi_add - initialize a napi context
1156 * @dev: network device
1157 * @napi: napi context
1158 * @poll: polling function
1159 * @weight: default weight
1161 * netif_napi_add() must be used to initialize a napi context prior to calling
1162 * *any* of the other napi related functions.
1164 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1165 int (*poll
)(struct napi_struct
*, int), int weight
);
1168 * netif_napi_del - remove a napi context
1169 * @napi: napi context
1171 * netif_napi_del() removes a napi context from the network device napi list
1173 void netif_napi_del(struct napi_struct
*napi
);
1175 struct napi_gro_cb
{
1176 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1179 /* Length of frag0. */
1180 unsigned int frag0_len
;
1182 /* This indicates where we are processing relative to skb->data. */
1185 /* This is non-zero if the packet may be of the same flow. */
1188 /* This is non-zero if the packet cannot be merged with the new skb. */
1191 /* Number of segments aggregated. */
1198 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1200 struct packet_type
{
1201 __be16 type
; /* This is really htons(ether_type). */
1202 struct net_device
*dev
; /* NULL is wildcarded here */
1203 int (*func
) (struct sk_buff
*,
1204 struct net_device
*,
1205 struct packet_type
*,
1206 struct net_device
*);
1207 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1209 int (*gso_send_check
)(struct sk_buff
*skb
);
1210 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1211 struct sk_buff
*skb
);
1212 int (*gro_complete
)(struct sk_buff
*skb
);
1213 void *af_packet_priv
;
1214 struct list_head list
;
1217 #include <linux/interrupt.h>
1218 #include <linux/notifier.h>
1220 extern rwlock_t dev_base_lock
; /* Device list lock */
1223 #define for_each_netdev(net, d) \
1224 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1225 #define for_each_netdev_reverse(net, d) \
1226 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1227 #define for_each_netdev_rcu(net, d) \
1228 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1229 #define for_each_netdev_safe(net, d, n) \
1230 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1231 #define for_each_netdev_continue(net, d) \
1232 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1233 #define for_each_netdev_continue_rcu(net, d) \
1234 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1235 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1237 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1239 struct list_head
*lh
;
1243 lh
= dev
->dev_list
.next
;
1244 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1247 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1249 struct list_head
*lh
;
1253 lh
= rcu_dereference(dev
->dev_list
.next
);
1254 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1257 static inline struct net_device
*first_net_device(struct net
*net
)
1259 return list_empty(&net
->dev_base_head
) ? NULL
:
1260 net_device_entry(net
->dev_base_head
.next
);
1263 extern int netdev_boot_setup_check(struct net_device
*dev
);
1264 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1265 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1266 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1267 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1268 extern void dev_add_pack(struct packet_type
*pt
);
1269 extern void dev_remove_pack(struct packet_type
*pt
);
1270 extern void __dev_remove_pack(struct packet_type
*pt
);
1272 extern struct net_device
*dev_get_by_flags(struct net
*net
, unsigned short flags
,
1273 unsigned short mask
);
1274 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1275 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1276 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1277 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1278 extern int dev_open(struct net_device
*dev
);
1279 extern int dev_close(struct net_device
*dev
);
1280 extern void dev_disable_lro(struct net_device
*dev
);
1281 extern int dev_queue_xmit(struct sk_buff
*skb
);
1282 extern int register_netdevice(struct net_device
*dev
);
1283 extern void unregister_netdevice_queue(struct net_device
*dev
,
1284 struct list_head
*head
);
1285 extern void unregister_netdevice_many(struct list_head
*head
);
1286 static inline void unregister_netdevice(struct net_device
*dev
)
1288 unregister_netdevice_queue(dev
, NULL
);
1291 extern void free_netdev(struct net_device
*dev
);
1292 extern void synchronize_net(void);
1293 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1294 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1295 extern int init_dummy_netdev(struct net_device
*dev
);
1296 extern void netdev_resync_ops(struct net_device
*dev
);
1298 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1299 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1300 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1301 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1302 extern int dev_restart(struct net_device
*dev
);
1303 #ifdef CONFIG_NETPOLL_TRAP
1304 extern int netpoll_trap(void);
1306 extern int skb_gro_receive(struct sk_buff
**head
,
1307 struct sk_buff
*skb
);
1308 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1310 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1312 return NAPI_GRO_CB(skb
)->data_offset
;
1315 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1317 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1320 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1322 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1325 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1326 unsigned int offset
)
1328 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1331 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1333 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1336 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1337 unsigned int offset
)
1339 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1340 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1341 return pskb_may_pull(skb
, hlen
) ? skb
->data
+ offset
: NULL
;
1344 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1346 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1349 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1351 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1352 skb_network_offset(skb
);
1355 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1356 unsigned short type
,
1357 const void *daddr
, const void *saddr
,
1360 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1363 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1366 static inline int dev_parse_header(const struct sk_buff
*skb
,
1367 unsigned char *haddr
)
1369 const struct net_device
*dev
= skb
->dev
;
1371 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1373 return dev
->header_ops
->parse(skb
, haddr
);
1376 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1377 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1378 static inline int unregister_gifconf(unsigned int family
)
1380 return register_gifconf(family
, NULL
);
1384 * Incoming packets are placed on per-cpu queues
1386 struct softnet_data
{
1387 struct Qdisc
*output_queue
;
1388 struct Qdisc
**output_queue_tailp
;
1389 struct list_head poll_list
;
1390 struct sk_buff
*completion_queue
;
1391 struct sk_buff_head process_queue
;
1394 struct softnet_data
*rps_ipi_list
;
1396 /* Elements below can be accessed between CPUs for RPS */
1397 struct call_single_data csd ____cacheline_aligned_in_smp
;
1398 struct softnet_data
*rps_ipi_next
;
1400 unsigned int input_queue_head
;
1402 struct sk_buff_head input_pkt_queue
;
1403 struct napi_struct backlog
;
1406 static inline void input_queue_head_add(struct softnet_data
*sd
,
1410 sd
->input_queue_head
+= len
;
1414 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1416 #define HAVE_NETIF_QUEUE
1418 extern void __netif_schedule(struct Qdisc
*q
);
1420 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1422 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1423 __netif_schedule(txq
->qdisc
);
1426 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1430 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1431 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1434 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1436 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1440 * netif_start_queue - allow transmit
1441 * @dev: network device
1443 * Allow upper layers to call the device hard_start_xmit routine.
1445 static inline void netif_start_queue(struct net_device
*dev
)
1447 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1450 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1454 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1455 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1456 netif_tx_start_queue(txq
);
1460 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1462 #ifdef CONFIG_NETPOLL_TRAP
1463 if (netpoll_trap()) {
1464 netif_tx_start_queue(dev_queue
);
1468 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1469 __netif_schedule(dev_queue
->qdisc
);
1473 * netif_wake_queue - restart transmit
1474 * @dev: network device
1476 * Allow upper layers to call the device hard_start_xmit routine.
1477 * Used for flow control when transmit resources are available.
1479 static inline void netif_wake_queue(struct net_device
*dev
)
1481 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1484 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1488 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1489 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1490 netif_tx_wake_queue(txq
);
1494 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1496 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1500 * netif_stop_queue - stop transmitted packets
1501 * @dev: network device
1503 * Stop upper layers calling the device hard_start_xmit routine.
1504 * Used for flow control when transmit resources are unavailable.
1506 static inline void netif_stop_queue(struct net_device
*dev
)
1508 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1511 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1515 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1516 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1517 netif_tx_stop_queue(txq
);
1521 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1523 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1527 * netif_queue_stopped - test if transmit queue is flowblocked
1528 * @dev: network device
1530 * Test if transmit queue on device is currently unable to send.
1532 static inline int netif_queue_stopped(const struct net_device
*dev
)
1534 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1537 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1539 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1543 * netif_running - test if up
1544 * @dev: network device
1546 * Test if the device has been brought up.
1548 static inline int netif_running(const struct net_device
*dev
)
1550 return test_bit(__LINK_STATE_START
, &dev
->state
);
1554 * Routines to manage the subqueues on a device. We only need start
1555 * stop, and a check if it's stopped. All other device management is
1556 * done at the overall netdevice level.
1557 * Also test the device if we're multiqueue.
1561 * netif_start_subqueue - allow sending packets on subqueue
1562 * @dev: network device
1563 * @queue_index: sub queue index
1565 * Start individual transmit queue of a device with multiple transmit queues.
1567 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1569 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1571 netif_tx_start_queue(txq
);
1575 * netif_stop_subqueue - stop sending packets on subqueue
1576 * @dev: network device
1577 * @queue_index: sub queue index
1579 * Stop individual transmit queue of a device with multiple transmit queues.
1581 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1583 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1584 #ifdef CONFIG_NETPOLL_TRAP
1588 netif_tx_stop_queue(txq
);
1592 * netif_subqueue_stopped - test status of subqueue
1593 * @dev: network device
1594 * @queue_index: sub queue index
1596 * Check individual transmit queue of a device with multiple transmit queues.
1598 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1601 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1603 return netif_tx_queue_stopped(txq
);
1606 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1607 struct sk_buff
*skb
)
1609 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1613 * netif_wake_subqueue - allow sending packets on subqueue
1614 * @dev: network device
1615 * @queue_index: sub queue index
1617 * Resume individual transmit queue of a device with multiple transmit queues.
1619 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1621 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1622 #ifdef CONFIG_NETPOLL_TRAP
1626 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1627 __netif_schedule(txq
->qdisc
);
1631 * netif_is_multiqueue - test if device has multiple transmit queues
1632 * @dev: network device
1634 * Check if device has multiple transmit queues
1636 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1638 return (dev
->num_tx_queues
> 1);
1641 /* Use this variant when it is known for sure that it
1642 * is executing from hardware interrupt context or with hardware interrupts
1645 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1647 /* Use this variant in places where it could be invoked
1648 * from either hardware interrupt or other context, with hardware interrupts
1649 * either disabled or enabled.
1651 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1653 #define HAVE_NETIF_RX 1
1654 extern int netif_rx(struct sk_buff
*skb
);
1655 extern int netif_rx_ni(struct sk_buff
*skb
);
1656 #define HAVE_NETIF_RECEIVE_SKB 1
1657 extern int netif_receive_skb(struct sk_buff
*skb
);
1658 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
1659 struct sk_buff
*skb
);
1660 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
1661 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
1662 struct sk_buff
*skb
);
1663 extern void napi_reuse_skb(struct napi_struct
*napi
,
1664 struct sk_buff
*skb
);
1665 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1666 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
1667 struct sk_buff
*skb
,
1669 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1670 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
1672 static inline void napi_free_frags(struct napi_struct
*napi
)
1674 kfree_skb(napi
->skb
);
1678 extern void netif_nit_deliver(struct sk_buff
*skb
);
1679 extern int dev_valid_name(const char *name
);
1680 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1681 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1682 extern unsigned dev_get_flags(const struct net_device
*);
1683 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
1684 extern int dev_change_flags(struct net_device
*, unsigned);
1685 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
1686 extern int dev_change_name(struct net_device
*, const char *);
1687 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1688 extern int dev_change_net_namespace(struct net_device
*,
1689 struct net
*, const char *);
1690 extern int dev_set_mtu(struct net_device
*, int);
1691 extern int dev_set_mac_address(struct net_device
*,
1693 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1694 struct net_device
*dev
,
1695 struct netdev_queue
*txq
);
1696 extern int dev_forward_skb(struct net_device
*dev
,
1697 struct sk_buff
*skb
);
1699 extern int netdev_budget
;
1701 /* Called by rtnetlink.c:rtnl_unlock() */
1702 extern void netdev_run_todo(void);
1705 * dev_put - release reference to device
1706 * @dev: network device
1708 * Release reference to device to allow it to be freed.
1710 static inline void dev_put(struct net_device
*dev
)
1712 atomic_dec(&dev
->refcnt
);
1716 * dev_hold - get reference to device
1717 * @dev: network device
1719 * Hold reference to device to keep it from being freed.
1721 static inline void dev_hold(struct net_device
*dev
)
1723 atomic_inc(&dev
->refcnt
);
1726 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1727 * and _off may be called from IRQ context, but it is caller
1728 * who is responsible for serialization of these calls.
1730 * The name carrier is inappropriate, these functions should really be
1731 * called netif_lowerlayer_*() because they represent the state of any
1732 * kind of lower layer not just hardware media.
1735 extern void linkwatch_fire_event(struct net_device
*dev
);
1736 extern void linkwatch_forget_dev(struct net_device
*dev
);
1739 * netif_carrier_ok - test if carrier present
1740 * @dev: network device
1742 * Check if carrier is present on device
1744 static inline int netif_carrier_ok(const struct net_device
*dev
)
1746 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1749 extern unsigned long dev_trans_start(struct net_device
*dev
);
1751 extern void __netdev_watchdog_up(struct net_device
*dev
);
1753 extern void netif_carrier_on(struct net_device
*dev
);
1755 extern void netif_carrier_off(struct net_device
*dev
);
1758 * netif_dormant_on - mark device as dormant.
1759 * @dev: network device
1761 * Mark device as dormant (as per RFC2863).
1763 * The dormant state indicates that the relevant interface is not
1764 * actually in a condition to pass packets (i.e., it is not 'up') but is
1765 * in a "pending" state, waiting for some external event. For "on-
1766 * demand" interfaces, this new state identifies the situation where the
1767 * interface is waiting for events to place it in the up state.
1770 static inline void netif_dormant_on(struct net_device
*dev
)
1772 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1773 linkwatch_fire_event(dev
);
1777 * netif_dormant_off - set device as not dormant.
1778 * @dev: network device
1780 * Device is not in dormant state.
1782 static inline void netif_dormant_off(struct net_device
*dev
)
1784 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1785 linkwatch_fire_event(dev
);
1789 * netif_dormant - test if carrier present
1790 * @dev: network device
1792 * Check if carrier is present on device
1794 static inline int netif_dormant(const struct net_device
*dev
)
1796 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1801 * netif_oper_up - test if device is operational
1802 * @dev: network device
1804 * Check if carrier is operational
1806 static inline int netif_oper_up(const struct net_device
*dev
)
1808 return (dev
->operstate
== IF_OPER_UP
||
1809 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1813 * netif_device_present - is device available or removed
1814 * @dev: network device
1816 * Check if device has not been removed from system.
1818 static inline int netif_device_present(struct net_device
*dev
)
1820 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1823 extern void netif_device_detach(struct net_device
*dev
);
1825 extern void netif_device_attach(struct net_device
*dev
);
1828 * Network interface message level settings
1830 #define HAVE_NETIF_MSG 1
1833 NETIF_MSG_DRV
= 0x0001,
1834 NETIF_MSG_PROBE
= 0x0002,
1835 NETIF_MSG_LINK
= 0x0004,
1836 NETIF_MSG_TIMER
= 0x0008,
1837 NETIF_MSG_IFDOWN
= 0x0010,
1838 NETIF_MSG_IFUP
= 0x0020,
1839 NETIF_MSG_RX_ERR
= 0x0040,
1840 NETIF_MSG_TX_ERR
= 0x0080,
1841 NETIF_MSG_TX_QUEUED
= 0x0100,
1842 NETIF_MSG_INTR
= 0x0200,
1843 NETIF_MSG_TX_DONE
= 0x0400,
1844 NETIF_MSG_RX_STATUS
= 0x0800,
1845 NETIF_MSG_PKTDATA
= 0x1000,
1846 NETIF_MSG_HW
= 0x2000,
1847 NETIF_MSG_WOL
= 0x4000,
1850 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1851 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1852 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1853 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1854 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1855 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1856 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1857 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1858 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1859 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1860 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1861 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1862 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1863 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1864 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1866 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1869 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1870 return default_msg_enable_bits
;
1871 if (debug_value
== 0) /* no output */
1873 /* set low N bits */
1874 return (1 << debug_value
) - 1;
1877 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1879 spin_lock(&txq
->_xmit_lock
);
1880 txq
->xmit_lock_owner
= cpu
;
1883 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1885 spin_lock_bh(&txq
->_xmit_lock
);
1886 txq
->xmit_lock_owner
= smp_processor_id();
1889 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1891 int ok
= spin_trylock(&txq
->_xmit_lock
);
1893 txq
->xmit_lock_owner
= smp_processor_id();
1897 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1899 txq
->xmit_lock_owner
= -1;
1900 spin_unlock(&txq
->_xmit_lock
);
1903 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
1905 txq
->xmit_lock_owner
= -1;
1906 spin_unlock_bh(&txq
->_xmit_lock
);
1909 static inline void txq_trans_update(struct netdev_queue
*txq
)
1911 if (txq
->xmit_lock_owner
!= -1)
1912 txq
->trans_start
= jiffies
;
1916 * netif_tx_lock - grab network device transmit lock
1917 * @dev: network device
1919 * Get network device transmit lock
1921 static inline void netif_tx_lock(struct net_device
*dev
)
1926 spin_lock(&dev
->tx_global_lock
);
1927 cpu
= smp_processor_id();
1928 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1929 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1931 /* We are the only thread of execution doing a
1932 * freeze, but we have to grab the _xmit_lock in
1933 * order to synchronize with threads which are in
1934 * the ->hard_start_xmit() handler and already
1935 * checked the frozen bit.
1937 __netif_tx_lock(txq
, cpu
);
1938 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1939 __netif_tx_unlock(txq
);
1943 static inline void netif_tx_lock_bh(struct net_device
*dev
)
1949 static inline void netif_tx_unlock(struct net_device
*dev
)
1953 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1954 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1956 /* No need to grab the _xmit_lock here. If the
1957 * queue is not stopped for another reason, we
1960 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1961 netif_schedule_queue(txq
);
1963 spin_unlock(&dev
->tx_global_lock
);
1966 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
1968 netif_tx_unlock(dev
);
1972 #define HARD_TX_LOCK(dev, txq, cpu) { \
1973 if ((dev->features & NETIF_F_LLTX) == 0) { \
1974 __netif_tx_lock(txq, cpu); \
1978 #define HARD_TX_UNLOCK(dev, txq) { \
1979 if ((dev->features & NETIF_F_LLTX) == 0) { \
1980 __netif_tx_unlock(txq); \
1984 static inline void netif_tx_disable(struct net_device
*dev
)
1990 cpu
= smp_processor_id();
1991 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1992 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1994 __netif_tx_lock(txq
, cpu
);
1995 netif_tx_stop_queue(txq
);
1996 __netif_tx_unlock(txq
);
2001 static inline void netif_addr_lock(struct net_device
*dev
)
2003 spin_lock(&dev
->addr_list_lock
);
2006 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2008 spin_lock_bh(&dev
->addr_list_lock
);
2011 static inline void netif_addr_unlock(struct net_device
*dev
)
2013 spin_unlock(&dev
->addr_list_lock
);
2016 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2018 spin_unlock_bh(&dev
->addr_list_lock
);
2022 * dev_addrs walker. Should be used only for read access. Call with
2023 * rcu_read_lock held.
2025 #define for_each_dev_addr(dev, ha) \
2026 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2028 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2030 extern void ether_setup(struct net_device
*dev
);
2032 /* Support for loadable net-drivers */
2033 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
2034 void (*setup
)(struct net_device
*),
2035 unsigned int queue_count
);
2036 #define alloc_netdev(sizeof_priv, name, setup) \
2037 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2038 extern int register_netdev(struct net_device
*dev
);
2039 extern void unregister_netdev(struct net_device
*dev
);
2041 /* General hardware address lists handling functions */
2042 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2043 struct netdev_hw_addr_list
*from_list
,
2044 int addr_len
, unsigned char addr_type
);
2045 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2046 struct netdev_hw_addr_list
*from_list
,
2047 int addr_len
, unsigned char addr_type
);
2048 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2049 struct netdev_hw_addr_list
*from_list
,
2051 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2052 struct netdev_hw_addr_list
*from_list
,
2054 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2055 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2057 /* Functions used for device addresses handling */
2058 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2059 unsigned char addr_type
);
2060 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2061 unsigned char addr_type
);
2062 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2063 struct net_device
*from_dev
,
2064 unsigned char addr_type
);
2065 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2066 struct net_device
*from_dev
,
2067 unsigned char addr_type
);
2068 extern void dev_addr_flush(struct net_device
*dev
);
2069 extern int dev_addr_init(struct net_device
*dev
);
2071 /* Functions used for unicast addresses handling */
2072 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2073 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2074 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2075 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2076 extern void dev_uc_flush(struct net_device
*dev
);
2077 extern void dev_uc_init(struct net_device
*dev
);
2079 /* Functions used for multicast addresses handling */
2080 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2081 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2082 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2083 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2084 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2085 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2086 extern void dev_mc_flush(struct net_device
*dev
);
2087 extern void dev_mc_init(struct net_device
*dev
);
2089 /* Functions used for secondary unicast and multicast support */
2090 extern void dev_set_rx_mode(struct net_device
*dev
);
2091 extern void __dev_set_rx_mode(struct net_device
*dev
);
2092 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2093 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2094 extern void netdev_state_change(struct net_device
*dev
);
2095 extern int netdev_bonding_change(struct net_device
*dev
,
2096 unsigned long event
);
2097 extern void netdev_features_change(struct net_device
*dev
);
2098 /* Load a device via the kmod */
2099 extern void dev_load(struct net
*net
, const char *name
);
2100 extern void dev_mcast_init(void);
2101 extern const struct net_device_stats
*dev_get_stats(struct net_device
*dev
);
2102 extern void dev_txq_stats_fold(const struct net_device
*dev
, struct net_device_stats
*stats
);
2104 extern int netdev_max_backlog
;
2105 extern int weight_p
;
2106 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2107 extern int skb_checksum_help(struct sk_buff
*skb
);
2108 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
2110 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2112 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2116 /* rx skb timestamps */
2117 extern void net_enable_timestamp(void);
2118 extern void net_disable_timestamp(void);
2120 #ifdef CONFIG_PROC_FS
2121 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2122 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2123 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2126 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2127 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2129 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
2131 extern void linkwatch_run_queue(void);
2133 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
2134 unsigned long mask
);
2135 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
2137 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2138 struct net_device
*dev
);
2140 static inline int net_gso_ok(int features
, int gso_type
)
2142 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2143 return (features
& feature
) == feature
;
2146 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
2148 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2149 (!skb_has_frags(skb
) || (features
& NETIF_F_FRAGLIST
));
2152 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
2154 return skb_is_gso(skb
) &&
2155 (!skb_gso_ok(skb
, dev
->features
) ||
2156 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
2159 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2162 dev
->gso_max_size
= size
;
2165 extern int __skb_bond_should_drop(struct sk_buff
*skb
,
2166 struct net_device
*master
);
2168 static inline int skb_bond_should_drop(struct sk_buff
*skb
,
2169 struct net_device
*master
)
2172 return __skb_bond_should_drop(skb
, master
);
2176 extern struct pernet_operations __net_initdata loopback_net_ops
;
2178 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
2179 struct ethtool_cmd
*cmd
)
2181 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
2183 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
2186 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
2188 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
2190 return dev
->ethtool_ops
->get_rx_csum(dev
);
2193 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
2195 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
2197 return dev
->ethtool_ops
->get_flags(dev
);
2200 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2202 /* netdev_printk helpers, similar to dev_printk */
2204 static inline const char *netdev_name(const struct net_device
*dev
)
2206 if (dev
->reg_state
!= NETREG_REGISTERED
)
2207 return "(unregistered net_device)";
2211 #define netdev_printk(level, netdev, format, args...) \
2212 dev_printk(level, (netdev)->dev.parent, \
2214 netdev_name(netdev), ##args)
2216 #define netdev_emerg(dev, format, args...) \
2217 netdev_printk(KERN_EMERG, dev, format, ##args)
2218 #define netdev_alert(dev, format, args...) \
2219 netdev_printk(KERN_ALERT, dev, format, ##args)
2220 #define netdev_crit(dev, format, args...) \
2221 netdev_printk(KERN_CRIT, dev, format, ##args)
2222 #define netdev_err(dev, format, args...) \
2223 netdev_printk(KERN_ERR, dev, format, ##args)
2224 #define netdev_warn(dev, format, args...) \
2225 netdev_printk(KERN_WARNING, dev, format, ##args)
2226 #define netdev_notice(dev, format, args...) \
2227 netdev_printk(KERN_NOTICE, dev, format, ##args)
2228 #define netdev_info(dev, format, args...) \
2229 netdev_printk(KERN_INFO, dev, format, ##args)
2232 #define netdev_dbg(__dev, format, args...) \
2233 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2234 #elif defined(CONFIG_DYNAMIC_DEBUG)
2235 #define netdev_dbg(__dev, format, args...) \
2237 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2238 netdev_name(__dev), ##args); \
2241 #define netdev_dbg(__dev, format, args...) \
2244 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2249 #if defined(VERBOSE_DEBUG)
2250 #define netdev_vdbg netdev_dbg
2253 #define netdev_vdbg(dev, format, args...) \
2256 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2262 * netdev_WARN() acts like dev_printk(), but with the key difference
2263 * of using a WARN/WARN_ON to get the message out, including the
2264 * file/line information and a backtrace.
2266 #define netdev_WARN(dev, format, args...) \
2267 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2269 /* netif printk helpers, similar to netdev_printk */
2271 #define netif_printk(priv, type, level, dev, fmt, args...) \
2273 if (netif_msg_##type(priv)) \
2274 netdev_printk(level, (dev), fmt, ##args); \
2277 #define netif_emerg(priv, type, dev, fmt, args...) \
2278 netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args)
2279 #define netif_alert(priv, type, dev, fmt, args...) \
2280 netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args)
2281 #define netif_crit(priv, type, dev, fmt, args...) \
2282 netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args)
2283 #define netif_err(priv, type, dev, fmt, args...) \
2284 netif_printk(priv, type, KERN_ERR, dev, fmt, ##args)
2285 #define netif_warn(priv, type, dev, fmt, args...) \
2286 netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args)
2287 #define netif_notice(priv, type, dev, fmt, args...) \
2288 netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args)
2289 #define netif_info(priv, type, dev, fmt, args...) \
2290 netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args)
2293 #define netif_dbg(priv, type, dev, format, args...) \
2294 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2295 #elif defined(CONFIG_DYNAMIC_DEBUG)
2296 #define netif_dbg(priv, type, netdev, format, args...) \
2298 if (netif_msg_##type(priv)) \
2299 dynamic_dev_dbg((netdev)->dev.parent, \
2301 netdev_name(netdev), ##args); \
2304 #define netif_dbg(priv, type, dev, format, args...) \
2307 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2312 #if defined(VERBOSE_DEBUG)
2313 #define netif_vdbg netdev_dbg
2315 #define netif_vdbg(priv, type, dev, format, args...) \
2318 netif_printk(KERN_DEBUG, dev, format, ##args); \
2323 #endif /* __KERNEL__ */
2325 #endif /* _LINUX_NETDEVICE_H */