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/pm_qos_params.h>
35 #include <linux/timer.h>
36 #include <linux/delay.h>
38 #include <asm/atomic.h>
39 #include <asm/cache.h>
40 #include <asm/byteorder.h>
42 #include <linux/device.h>
43 #include <linux/percpu.h>
44 #include <linux/rculist.h>
45 #include <linux/dmaengine.h>
46 #include <linux/workqueue.h>
48 #include <linux/ethtool.h>
49 #include <net/net_namespace.h>
52 #include <net/dcbnl.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
64 functions are available. */
65 #define HAVE_FREE_NETDEV /* free_netdev() */
66 #define HAVE_NETDEV_PRIV /* netdev_priv() */
68 /* Backlog congestion levels */
69 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70 #define NET_RX_DROP 1 /* packet dropped */
73 * Transmit return codes: transmit return codes originate from three different
76 * - qdisc return codes
77 * - driver transmit return codes
80 * Drivers are allowed to return any one of those in their hard_start_xmit()
81 * function. Real network devices commonly used with qdiscs should only return
82 * the driver transmit return codes though - when qdiscs are used, the actual
83 * transmission happens asynchronously, so the value is not propagated to
84 * higher layers. Virtual network devices transmit synchronously, in this case
85 * the driver transmit return codes are consumed by dev_queue_xmit(), all
86 * others are propagated to higher layers.
89 /* qdisc ->enqueue() return codes. */
90 #define NET_XMIT_SUCCESS 0x00
91 #define NET_XMIT_DROP 0x01 /* skb dropped */
92 #define NET_XMIT_CN 0x02 /* congestion notification */
93 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
94 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
96 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
97 * indicates that the device will soon be dropping packets, or already drops
98 * some packets of the same priority; prompting us to send less aggressively. */
99 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
100 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
102 /* Driver transmit return codes */
103 #define NETDEV_TX_MASK 0xf0
106 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
107 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
108 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
109 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
111 typedef enum netdev_tx netdev_tx_t
;
114 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
115 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
117 static inline bool dev_xmit_complete(int rc
)
120 * Positive cases with an skb consumed by a driver:
121 * - successful transmission (rc == NETDEV_TX_OK)
122 * - error while transmitting (rc < 0)
123 * - error while queueing to a different device (rc & NET_XMIT_MASK)
125 if (likely(rc
< NET_XMIT_MASK
))
133 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
137 * Compute the worst case header length according to the protocols
141 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
147 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
148 # define LL_MAX_HEADER 48
150 # define LL_MAX_HEADER 32
153 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
154 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
155 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
156 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
157 #define MAX_HEADER LL_MAX_HEADER
159 #define MAX_HEADER (LL_MAX_HEADER + 48)
162 #endif /* __KERNEL__ */
165 * Network device statistics. Akin to the 2.0 ether stats but
166 * with byte counters.
169 struct net_device_stats
{
170 unsigned long rx_packets
; /* total packets received */
171 unsigned long tx_packets
; /* total packets transmitted */
172 unsigned long rx_bytes
; /* total bytes received */
173 unsigned long tx_bytes
; /* total bytes transmitted */
174 unsigned long rx_errors
; /* bad packets received */
175 unsigned long tx_errors
; /* packet transmit problems */
176 unsigned long rx_dropped
; /* no space in linux buffers */
177 unsigned long tx_dropped
; /* no space available in linux */
178 unsigned long multicast
; /* multicast packets received */
179 unsigned long collisions
;
181 /* detailed rx_errors: */
182 unsigned long rx_length_errors
;
183 unsigned long rx_over_errors
; /* receiver ring buff overflow */
184 unsigned long rx_crc_errors
; /* recved pkt with crc error */
185 unsigned long rx_frame_errors
; /* recv'd frame alignment error */
186 unsigned long rx_fifo_errors
; /* recv'r fifo overrun */
187 unsigned long rx_missed_errors
; /* receiver missed packet */
189 /* detailed tx_errors */
190 unsigned long tx_aborted_errors
;
191 unsigned long tx_carrier_errors
;
192 unsigned long tx_fifo_errors
;
193 unsigned long tx_heartbeat_errors
;
194 unsigned long tx_window_errors
;
197 unsigned long rx_compressed
;
198 unsigned long tx_compressed
;
202 /* Media selection options. */
215 #include <linux/cache.h>
216 #include <linux/skbuff.h>
222 struct netdev_hw_addr
{
223 struct list_head list
;
224 unsigned char addr
[MAX_ADDR_LEN
];
226 #define NETDEV_HW_ADDR_T_LAN 1
227 #define NETDEV_HW_ADDR_T_SAN 2
228 #define NETDEV_HW_ADDR_T_SLAVE 3
229 #define NETDEV_HW_ADDR_T_UNICAST 4
230 #define NETDEV_HW_ADDR_T_MULTICAST 5
234 struct rcu_head rcu_head
;
237 struct netdev_hw_addr_list
{
238 struct list_head list
;
242 #define netdev_hw_addr_list_count(l) ((l)->count)
243 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
244 #define netdev_hw_addr_list_for_each(ha, l) \
245 list_for_each_entry(ha, &(l)->list, list)
247 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
248 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
249 #define netdev_for_each_uc_addr(ha, dev) \
250 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
252 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
253 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
254 #define netdev_for_each_mc_addr(ha, dev) \
255 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
258 struct hh_cache
*hh_next
; /* Next entry */
259 atomic_t hh_refcnt
; /* number of users */
261 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
263 * They are mostly read, but hh_refcnt may be changed quite frequently,
264 * incurring cache line ping pongs.
266 __be16 hh_type ____cacheline_aligned_in_smp
;
267 /* protocol identifier, f.e ETH_P_IP
268 * NOTE: For VLANs, this will be the
269 * encapuslated type. --BLG
271 u16 hh_len
; /* length of header */
272 int (*hh_output
)(struct sk_buff
*skb
);
275 /* cached hardware header; allow for machine alignment needs. */
276 #define HH_DATA_MOD 16
277 #define HH_DATA_OFF(__len) \
278 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
279 #define HH_DATA_ALIGN(__len) \
280 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
281 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
284 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
286 * dev->hard_header_len ? (dev->hard_header_len +
287 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
289 * We could use other alignment values, but we must maintain the
290 * relationship HH alignment <= LL alignment.
292 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
295 #define LL_RESERVED_SPACE(dev) \
296 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
297 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
298 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
299 #define LL_ALLOCATED_SPACE(dev) \
300 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
303 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
304 unsigned short type
, const void *daddr
,
305 const void *saddr
, unsigned len
);
306 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
307 int (*rebuild
)(struct sk_buff
*skb
);
308 #define HAVE_HEADER_CACHE
309 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
310 void (*cache_update
)(struct hh_cache
*hh
,
311 const struct net_device
*dev
,
312 const unsigned char *haddr
);
315 /* These flag bits are private to the generic network queueing
316 * layer, they may not be explicitly referenced by any other
320 enum netdev_state_t
{
322 __LINK_STATE_PRESENT
,
323 __LINK_STATE_NOCARRIER
,
324 __LINK_STATE_LINKWATCH_PENDING
,
325 __LINK_STATE_DORMANT
,
330 * This structure holds at boot time configured netdevice settings. They
331 * are then used in the device probing.
333 struct netdev_boot_setup
{
337 #define NETDEV_BOOT_SETUP_MAX 8
339 extern int __init
netdev_boot_setup(char *str
);
342 * Structure for NAPI scheduling similar to tasklet but with weighting
345 /* The poll_list must only be managed by the entity which
346 * changes the state of the NAPI_STATE_SCHED bit. This means
347 * whoever atomically sets that bit can add this napi_struct
348 * to the per-cpu poll_list, and whoever clears that bit
349 * can remove from the list right before clearing the bit.
351 struct list_head poll_list
;
355 int (*poll
)(struct napi_struct
*, int);
356 #ifdef CONFIG_NETPOLL
357 spinlock_t poll_lock
;
361 unsigned int gro_count
;
363 struct net_device
*dev
;
364 struct list_head dev_list
;
365 struct sk_buff
*gro_list
;
370 NAPI_STATE_SCHED
, /* Poll is scheduled */
371 NAPI_STATE_DISABLE
, /* Disable pending */
372 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
382 typedef enum gro_result gro_result_t
;
384 extern void __napi_schedule(struct napi_struct
*n
);
386 static inline int napi_disable_pending(struct napi_struct
*n
)
388 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
392 * napi_schedule_prep - check if napi can be scheduled
395 * Test if NAPI routine is already running, and if not mark
396 * it as running. This is used as a condition variable
397 * insure only one NAPI poll instance runs. We also make
398 * sure there is no pending NAPI disable.
400 static inline int napi_schedule_prep(struct napi_struct
*n
)
402 return !napi_disable_pending(n
) &&
403 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
407 * napi_schedule - schedule NAPI poll
410 * Schedule NAPI poll routine to be called if it is not already
413 static inline void napi_schedule(struct napi_struct
*n
)
415 if (napi_schedule_prep(n
))
419 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
420 static inline int napi_reschedule(struct napi_struct
*napi
)
422 if (napi_schedule_prep(napi
)) {
423 __napi_schedule(napi
);
430 * napi_complete - NAPI processing complete
433 * Mark NAPI processing as complete.
435 extern void __napi_complete(struct napi_struct
*n
);
436 extern void napi_complete(struct napi_struct
*n
);
439 * napi_disable - prevent NAPI from scheduling
442 * Stop NAPI from being scheduled on this context.
443 * Waits till any outstanding processing completes.
445 static inline void napi_disable(struct napi_struct
*n
)
447 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
448 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
450 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
454 * napi_enable - enable NAPI scheduling
457 * Resume NAPI from being scheduled on this context.
458 * Must be paired with napi_disable.
460 static inline void napi_enable(struct napi_struct
*n
)
462 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
463 smp_mb__before_clear_bit();
464 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
469 * napi_synchronize - wait until NAPI is not running
472 * Wait until NAPI is done being scheduled on this context.
473 * Waits till any outstanding processing completes but
474 * does not disable future activations.
476 static inline void napi_synchronize(const struct napi_struct
*n
)
478 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
482 # define napi_synchronize(n) barrier()
485 enum netdev_queue_state_t
{
487 __QUEUE_STATE_FROZEN
,
490 struct netdev_queue
{
494 struct net_device
*dev
;
497 struct Qdisc
*qdisc_sleeping
;
501 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
504 * please use this field instead of dev->trans_start
506 unsigned long trans_start
;
507 unsigned long tx_bytes
;
508 unsigned long tx_packets
;
509 unsigned long tx_dropped
;
510 } ____cacheline_aligned_in_smp
;
514 * This structure holds an RPS map which can be of variable length. The
515 * map is an array of CPUs.
522 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
525 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
526 * tail pointer for that CPU's input queue at the time of last enqueue.
528 struct rps_dev_flow
{
531 unsigned int last_qtail
;
535 * The rps_dev_flow_table structure contains a table of flow mappings.
537 struct rps_dev_flow_table
{
540 struct work_struct free_work
;
541 struct rps_dev_flow flows
[0];
543 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
544 (_num * sizeof(struct rps_dev_flow)))
547 * The rps_sock_flow_table contains mappings of flows to the last CPU
548 * on which they were processed by the application (set in recvmsg).
550 struct rps_sock_flow_table
{
554 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
555 (_num * sizeof(u16)))
557 #define RPS_NO_CPU 0xffff
559 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
563 unsigned int cpu
, index
= hash
& table
->mask
;
565 /* We only give a hint, preemption can change cpu under us */
566 cpu
= raw_smp_processor_id();
568 if (table
->ents
[index
] != cpu
)
569 table
->ents
[index
] = cpu
;
573 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
577 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
580 extern struct rps_sock_flow_table
*rps_sock_flow_table
;
582 /* This structure contains an instance of an RX queue. */
583 struct netdev_rx_queue
{
584 struct rps_map
*rps_map
;
585 struct rps_dev_flow_table
*rps_flow_table
;
587 struct netdev_rx_queue
*first
;
589 } ____cacheline_aligned_in_smp
;
590 #endif /* CONFIG_RPS */
593 * This structure defines the management hooks for network devices.
594 * The following hooks can be defined; unless noted otherwise, they are
595 * optional and can be filled with a null pointer.
597 * int (*ndo_init)(struct net_device *dev);
598 * This function is called once when network device is registered.
599 * The network device can use this to any late stage initializaton
600 * or semantic validattion. It can fail with an error code which will
601 * be propogated back to register_netdev
603 * void (*ndo_uninit)(struct net_device *dev);
604 * This function is called when device is unregistered or when registration
605 * fails. It is not called if init fails.
607 * int (*ndo_open)(struct net_device *dev);
608 * This function is called when network device transistions to the up
611 * int (*ndo_stop)(struct net_device *dev);
612 * This function is called when network device transistions to the down
615 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
616 * struct net_device *dev);
617 * Called when a packet needs to be transmitted.
618 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
619 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
620 * Required can not be NULL.
622 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
623 * Called to decide which queue to when device supports multiple
626 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
627 * This function is called to allow device receiver to make
628 * changes to configuration when multicast or promiscious is enabled.
630 * void (*ndo_set_rx_mode)(struct net_device *dev);
631 * This function is called device changes address list filtering.
633 * void (*ndo_set_multicast_list)(struct net_device *dev);
634 * This function is called when the multicast address list changes.
636 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
637 * This function is called when the Media Access Control address
638 * needs to be changed. If this interface is not defined, the
639 * mac address can not be changed.
641 * int (*ndo_validate_addr)(struct net_device *dev);
642 * Test if Media Access Control address is valid for the device.
644 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
645 * Called when a user request an ioctl which can't be handled by
646 * the generic interface code. If not defined ioctl's return
647 * not supported error code.
649 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
650 * Used to set network devices bus interface parameters. This interface
651 * is retained for legacy reason, new devices should use the bus
652 * interface (PCI) for low level management.
654 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
655 * Called when a user wants to change the Maximum Transfer Unit
656 * of a device. If not defined, any request to change MTU will
657 * will return an error.
659 * void (*ndo_tx_timeout)(struct net_device *dev);
660 * Callback uses when the transmitter has not made any progress
661 * for dev->watchdog ticks.
663 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
664 * Called when a user wants to get the network device usage
665 * statistics. If not defined, the counters in dev->stats will
668 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
669 * If device support VLAN receive accleration
670 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
671 * when vlan groups for the device changes. Note: grp is NULL
672 * if no vlan's groups are being used.
674 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
675 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
676 * this function is called when a VLAN id is registered.
678 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
679 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
680 * this function is called when a VLAN id is unregistered.
682 * void (*ndo_poll_controller)(struct net_device *dev);
684 * SR-IOV management functions.
685 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
686 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
687 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
688 * int (*ndo_get_vf_config)(struct net_device *dev,
689 * int vf, struct ifla_vf_info *ivf);
690 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
691 * struct nlattr *port[]);
692 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
694 #define HAVE_NET_DEVICE_OPS
695 struct net_device_ops
{
696 int (*ndo_init
)(struct net_device
*dev
);
697 void (*ndo_uninit
)(struct net_device
*dev
);
698 int (*ndo_open
)(struct net_device
*dev
);
699 int (*ndo_stop
)(struct net_device
*dev
);
700 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
701 struct net_device
*dev
);
702 u16 (*ndo_select_queue
)(struct net_device
*dev
,
703 struct sk_buff
*skb
);
704 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
706 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
707 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
708 int (*ndo_set_mac_address
)(struct net_device
*dev
,
710 int (*ndo_validate_addr
)(struct net_device
*dev
);
711 int (*ndo_do_ioctl
)(struct net_device
*dev
,
712 struct ifreq
*ifr
, int cmd
);
713 int (*ndo_set_config
)(struct net_device
*dev
,
715 int (*ndo_change_mtu
)(struct net_device
*dev
,
717 int (*ndo_neigh_setup
)(struct net_device
*dev
,
718 struct neigh_parms
*);
719 void (*ndo_tx_timeout
) (struct net_device
*dev
);
721 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
723 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
724 struct vlan_group
*grp
);
725 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
727 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
729 #ifdef CONFIG_NET_POLL_CONTROLLER
730 void (*ndo_poll_controller
)(struct net_device
*dev
);
731 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
733 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
735 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
736 int queue
, u16 vlan
, u8 qos
);
737 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
739 int (*ndo_get_vf_config
)(struct net_device
*dev
,
741 struct ifla_vf_info
*ivf
);
742 int (*ndo_set_vf_port
)(struct net_device
*dev
,
744 struct nlattr
*port
[]);
745 int (*ndo_get_vf_port
)(struct net_device
*dev
,
746 int vf
, struct sk_buff
*skb
);
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
782 struct pm_qos_request_list
*pm_qos_req
;
784 /* device name hash chain */
785 struct hlist_node name_hlist
;
790 * I/O specific fields
791 * FIXME: Merge these and struct ifmap into one
793 unsigned long mem_end
; /* shared mem end */
794 unsigned long mem_start
; /* shared mem start */
795 unsigned long base_addr
; /* device I/O address */
796 unsigned int irq
; /* device IRQ number */
799 * Some hardware also needs these fields, but they are not
800 * part of the usual set specified in Space.c.
803 unsigned char if_port
; /* Selectable AUI, TP,..*/
804 unsigned char dma
; /* DMA channel */
808 struct list_head dev_list
;
809 struct list_head napi_list
;
810 struct list_head unreg_list
;
812 /* Net device features */
813 unsigned long features
;
814 #define NETIF_F_SG 1 /* Scatter/gather IO. */
815 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
816 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
817 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
818 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
819 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
820 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
821 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
822 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
823 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
824 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
825 #define NETIF_F_GSO 2048 /* Enable software GSO. */
826 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
827 /* do not use LLTX in new drivers */
828 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
829 #define NETIF_F_GRO 16384 /* Generic receive offload */
830 #define NETIF_F_LRO 32768 /* large receive offload */
832 /* the GSO_MASK reserves bits 16 through 23 */
833 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
834 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
835 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
836 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
837 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
839 /* Segmentation offload features */
840 #define NETIF_F_GSO_SHIFT 16
841 #define NETIF_F_GSO_MASK 0x00ff0000
842 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
843 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
844 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
845 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
846 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
847 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
849 /* List of features with software fallbacks. */
850 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
853 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
854 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
855 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
856 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
859 * If one device supports one of these features, then enable them
860 * for all in netdev_increment_features.
862 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
863 NETIF_F_SG | NETIF_F_HIGHDMA | \
866 /* Interface index. Unique device identifier */
870 struct net_device_stats stats
;
872 #ifdef CONFIG_WIRELESS_EXT
873 /* List of functions to handle Wireless Extensions (instead of ioctl).
874 * See <net/iw_handler.h> for details. Jean II */
875 const struct iw_handler_def
* wireless_handlers
;
876 /* Instance data managed by the core of Wireless Extensions. */
877 struct iw_public_data
* wireless_data
;
879 /* Management operations */
880 const struct net_device_ops
*netdev_ops
;
881 const struct ethtool_ops
*ethtool_ops
;
883 /* Hardware header description */
884 const struct header_ops
*header_ops
;
886 unsigned int flags
; /* interface flags (a la BSD) */
887 unsigned short gflags
;
888 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
889 unsigned short padded
; /* How much padding added by alloc_netdev() */
891 unsigned char operstate
; /* RFC2863 operstate */
892 unsigned char link_mode
; /* mapping policy to operstate */
894 unsigned int mtu
; /* interface MTU value */
895 unsigned short type
; /* interface hardware type */
896 unsigned short hard_header_len
; /* hardware hdr length */
898 /* extra head- and tailroom the hardware may need, but not in all cases
899 * can this be guaranteed, especially tailroom. Some cases also use
900 * LL_MAX_HEADER instead to allocate the skb.
902 unsigned short needed_headroom
;
903 unsigned short needed_tailroom
;
905 struct net_device
*master
; /* Pointer to master device of a group,
906 * which this device is member of.
909 /* Interface address info. */
910 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
911 unsigned char addr_len
; /* hardware address length */
912 unsigned short dev_id
; /* for shared network cards */
914 spinlock_t addr_list_lock
;
915 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
916 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
918 unsigned int promiscuity
;
919 unsigned int allmulti
;
922 /* Protocol specific pointers */
924 #ifdef CONFIG_NET_DSA
925 void *dsa_ptr
; /* dsa specific data */
927 void *atalk_ptr
; /* AppleTalk link */
928 void *ip_ptr
; /* IPv4 specific data */
929 void *dn_ptr
; /* DECnet specific data */
930 void *ip6_ptr
; /* IPv6 specific data */
931 void *ec_ptr
; /* Econet specific data */
932 void *ax25_ptr
; /* AX.25 specific data */
933 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
934 assign before registering */
937 * Cache line mostly used on receive path (including eth_type_trans())
939 unsigned long last_rx
; /* Time of last Rx */
940 /* Interface address info used in eth_type_trans() */
941 unsigned char *dev_addr
; /* hw address, (before bcast
942 because most packets are
945 struct netdev_hw_addr_list dev_addrs
; /* list of device
948 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
951 struct kset
*queues_kset
;
953 struct netdev_rx_queue
*_rx
;
955 /* Number of RX queues allocated at alloc_netdev_mq() time */
956 unsigned int num_rx_queues
;
959 struct netdev_queue rx_queue
;
961 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
963 /* Number of TX queues allocated at alloc_netdev_mq() time */
964 unsigned int num_tx_queues
;
966 /* Number of TX queues currently active in device */
967 unsigned int real_num_tx_queues
;
969 /* root qdisc from userspace point of view */
972 unsigned long tx_queue_len
; /* Max frames per queue allowed */
973 spinlock_t tx_global_lock
;
975 * One part is mostly used on xmit path (device)
977 /* These may be needed for future network-power-down code. */
980 * trans_start here is expensive for high speed devices on SMP,
981 * please use netdev_queue->trans_start instead.
983 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
985 int watchdog_timeo
; /* used by dev_watchdog() */
986 struct timer_list watchdog_timer
;
988 /* Number of references to this device */
989 atomic_t refcnt ____cacheline_aligned_in_smp
;
991 /* delayed register/unregister */
992 struct list_head todo_list
;
993 /* device index hash chain */
994 struct hlist_node index_hlist
;
996 struct list_head link_watch_list
;
998 /* register/unregister state machine */
999 enum { NETREG_UNINITIALIZED
=0,
1000 NETREG_REGISTERED
, /* completed register_netdevice */
1001 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1002 NETREG_UNREGISTERED
, /* completed unregister todo */
1003 NETREG_RELEASED
, /* called free_netdev */
1004 NETREG_DUMMY
, /* dummy device for NAPI poll */
1008 RTNL_LINK_INITIALIZED
,
1009 RTNL_LINK_INITIALIZING
,
1010 } rtnl_link_state
:16;
1012 /* Called from unregister, can be used to call free_netdev */
1013 void (*destructor
)(struct net_device
*dev
);
1015 #ifdef CONFIG_NETPOLL
1016 struct netpoll_info
*npinfo
;
1019 #ifdef CONFIG_NET_NS
1020 /* Network namespace this network device is inside */
1024 /* mid-layer private */
1028 struct net_bridge_port
*br_port
;
1030 struct macvlan_port
*macvlan_port
;
1032 struct garp_port
*garp_port
;
1034 /* class/net/name entry */
1036 /* space for optional device, statistics, and wireless sysfs groups */
1037 const struct attribute_group
*sysfs_groups
[4];
1039 /* rtnetlink link ops */
1040 const struct rtnl_link_ops
*rtnl_link_ops
;
1042 /* VLAN feature mask */
1043 unsigned long vlan_features
;
1045 /* for setting kernel sock attribute on TCP connection setup */
1046 #define GSO_MAX_SIZE 65536
1047 unsigned int gso_max_size
;
1050 /* Data Center Bridging netlink ops */
1051 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1054 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1055 /* max exchange id for FCoE LRO by ddp */
1056 unsigned int fcoe_ddp_xid
;
1058 /* n-tuple filter list attached to this device */
1059 struct ethtool_rx_ntuple_list ethtool_ntuple_list
;
1061 #define to_net_dev(d) container_of(d, struct net_device, dev)
1063 #define NETDEV_ALIGN 32
1066 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1069 return &dev
->_tx
[index
];
1072 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1073 void (*f
)(struct net_device
*,
1074 struct netdev_queue
*,
1080 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1081 f(dev
, &dev
->_tx
[i
], arg
);
1085 * Net namespace inlines
1088 struct net
*dev_net(const struct net_device
*dev
)
1090 #ifdef CONFIG_NET_NS
1098 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1100 #ifdef CONFIG_NET_NS
1101 release_net(dev
->nd_net
);
1102 dev
->nd_net
= hold_net(net
);
1106 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1108 #ifdef CONFIG_NET_DSA_TAG_DSA
1109 if (dev
->dsa_ptr
!= NULL
)
1110 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1116 #ifndef CONFIG_NET_NS
1117 static inline void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
)
1121 #else /* CONFIG_NET_NS */
1122 void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
);
1125 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1127 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1128 if (dev
->dsa_ptr
!= NULL
)
1129 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1136 * netdev_priv - access network device private data
1137 * @dev: network device
1139 * Get network device private data
1141 static inline void *netdev_priv(const struct net_device
*dev
)
1143 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1146 /* Set the sysfs physical device reference for the network logical device
1147 * if set prior to registration will cause a symlink during initialization.
1149 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1151 /* Set the sysfs device type for the network logical device to allow
1152 * fin grained indentification of different network device types. For
1153 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1155 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1158 * netif_napi_add - initialize a napi context
1159 * @dev: network device
1160 * @napi: napi context
1161 * @poll: polling function
1162 * @weight: default weight
1164 * netif_napi_add() must be used to initialize a napi context prior to calling
1165 * *any* of the other napi related functions.
1167 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1168 int (*poll
)(struct napi_struct
*, int), int weight
);
1171 * netif_napi_del - remove a napi context
1172 * @napi: napi context
1174 * netif_napi_del() removes a napi context from the network device napi list
1176 void netif_napi_del(struct napi_struct
*napi
);
1178 struct napi_gro_cb
{
1179 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1182 /* Length of frag0. */
1183 unsigned int frag0_len
;
1185 /* This indicates where we are processing relative to skb->data. */
1188 /* This is non-zero if the packet may be of the same flow. */
1191 /* This is non-zero if the packet cannot be merged with the new skb. */
1194 /* Number of segments aggregated. */
1201 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1203 struct packet_type
{
1204 __be16 type
; /* This is really htons(ether_type). */
1205 struct net_device
*dev
; /* NULL is wildcarded here */
1206 int (*func
) (struct sk_buff
*,
1207 struct net_device
*,
1208 struct packet_type
*,
1209 struct net_device
*);
1210 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1212 int (*gso_send_check
)(struct sk_buff
*skb
);
1213 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1214 struct sk_buff
*skb
);
1215 int (*gro_complete
)(struct sk_buff
*skb
);
1216 void *af_packet_priv
;
1217 struct list_head list
;
1220 #include <linux/interrupt.h>
1221 #include <linux/notifier.h>
1223 extern rwlock_t dev_base_lock
; /* Device list lock */
1226 #define for_each_netdev(net, d) \
1227 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1228 #define for_each_netdev_reverse(net, d) \
1229 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1230 #define for_each_netdev_rcu(net, d) \
1231 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1232 #define for_each_netdev_safe(net, d, n) \
1233 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1234 #define for_each_netdev_continue(net, d) \
1235 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1236 #define for_each_netdev_continue_rcu(net, d) \
1237 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1238 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1240 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1242 struct list_head
*lh
;
1246 lh
= dev
->dev_list
.next
;
1247 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1250 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1252 struct list_head
*lh
;
1256 lh
= rcu_dereference(dev
->dev_list
.next
);
1257 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1260 static inline struct net_device
*first_net_device(struct net
*net
)
1262 return list_empty(&net
->dev_base_head
) ? NULL
:
1263 net_device_entry(net
->dev_base_head
.next
);
1266 extern int netdev_boot_setup_check(struct net_device
*dev
);
1267 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1268 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1269 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1270 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1271 extern void dev_add_pack(struct packet_type
*pt
);
1272 extern void dev_remove_pack(struct packet_type
*pt
);
1273 extern void __dev_remove_pack(struct packet_type
*pt
);
1275 extern struct net_device
*dev_get_by_flags(struct net
*net
, unsigned short flags
,
1276 unsigned short mask
);
1277 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1278 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1279 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1280 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1281 extern int dev_open(struct net_device
*dev
);
1282 extern int dev_close(struct net_device
*dev
);
1283 extern void dev_disable_lro(struct net_device
*dev
);
1284 extern int dev_queue_xmit(struct sk_buff
*skb
);
1285 extern int register_netdevice(struct net_device
*dev
);
1286 extern void unregister_netdevice_queue(struct net_device
*dev
,
1287 struct list_head
*head
);
1288 extern void unregister_netdevice_many(struct list_head
*head
);
1289 static inline void unregister_netdevice(struct net_device
*dev
)
1291 unregister_netdevice_queue(dev
, NULL
);
1294 extern void free_netdev(struct net_device
*dev
);
1295 extern void synchronize_net(void);
1296 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1297 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1298 extern int init_dummy_netdev(struct net_device
*dev
);
1299 extern void netdev_resync_ops(struct net_device
*dev
);
1301 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1302 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1303 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1304 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1305 extern int dev_restart(struct net_device
*dev
);
1306 #ifdef CONFIG_NETPOLL_TRAP
1307 extern int netpoll_trap(void);
1309 extern int skb_gro_receive(struct sk_buff
**head
,
1310 struct sk_buff
*skb
);
1311 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1313 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1315 return NAPI_GRO_CB(skb
)->data_offset
;
1318 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1320 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1323 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1325 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1328 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1329 unsigned int offset
)
1331 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1334 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1336 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1339 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1340 unsigned int offset
)
1342 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1343 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1344 return pskb_may_pull(skb
, hlen
) ? skb
->data
+ offset
: NULL
;
1347 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1349 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1352 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1354 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1355 skb_network_offset(skb
);
1358 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1359 unsigned short type
,
1360 const void *daddr
, const void *saddr
,
1363 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1366 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1369 static inline int dev_parse_header(const struct sk_buff
*skb
,
1370 unsigned char *haddr
)
1372 const struct net_device
*dev
= skb
->dev
;
1374 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1376 return dev
->header_ops
->parse(skb
, haddr
);
1379 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1380 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1381 static inline int unregister_gifconf(unsigned int family
)
1383 return register_gifconf(family
, NULL
);
1387 * Incoming packets are placed on per-cpu queues
1389 struct softnet_data
{
1390 struct Qdisc
*output_queue
;
1391 struct Qdisc
**output_queue_tailp
;
1392 struct list_head poll_list
;
1393 struct sk_buff
*completion_queue
;
1394 struct sk_buff_head process_queue
;
1397 unsigned int processed
;
1398 unsigned int time_squeeze
;
1399 unsigned int cpu_collision
;
1400 unsigned int received_rps
;
1403 struct softnet_data
*rps_ipi_list
;
1405 /* Elements below can be accessed between CPUs for RPS */
1406 struct call_single_data csd ____cacheline_aligned_in_smp
;
1407 struct softnet_data
*rps_ipi_next
;
1409 unsigned int input_queue_head
;
1410 unsigned int input_queue_tail
;
1413 struct sk_buff_head input_pkt_queue
;
1414 struct napi_struct backlog
;
1417 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1420 sd
->input_queue_head
++;
1424 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1425 unsigned int *qtail
)
1428 *qtail
= ++sd
->input_queue_tail
;
1432 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1434 #define HAVE_NETIF_QUEUE
1436 extern void __netif_schedule(struct Qdisc
*q
);
1438 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1440 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1441 __netif_schedule(txq
->qdisc
);
1444 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1448 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1449 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1452 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1454 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1458 * netif_start_queue - allow transmit
1459 * @dev: network device
1461 * Allow upper layers to call the device hard_start_xmit routine.
1463 static inline void netif_start_queue(struct net_device
*dev
)
1465 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1468 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1472 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1473 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1474 netif_tx_start_queue(txq
);
1478 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1480 #ifdef CONFIG_NETPOLL_TRAP
1481 if (netpoll_trap()) {
1482 netif_tx_start_queue(dev_queue
);
1486 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1487 __netif_schedule(dev_queue
->qdisc
);
1491 * netif_wake_queue - restart transmit
1492 * @dev: network device
1494 * Allow upper layers to call the device hard_start_xmit routine.
1495 * Used for flow control when transmit resources are available.
1497 static inline void netif_wake_queue(struct net_device
*dev
)
1499 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1502 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1506 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1507 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1508 netif_tx_wake_queue(txq
);
1512 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1514 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1518 * netif_stop_queue - stop transmitted packets
1519 * @dev: network device
1521 * Stop upper layers calling the device hard_start_xmit routine.
1522 * Used for flow control when transmit resources are unavailable.
1524 static inline void netif_stop_queue(struct net_device
*dev
)
1526 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1529 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1533 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1534 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1535 netif_tx_stop_queue(txq
);
1539 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1541 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1545 * netif_queue_stopped - test if transmit queue is flowblocked
1546 * @dev: network device
1548 * Test if transmit queue on device is currently unable to send.
1550 static inline int netif_queue_stopped(const struct net_device
*dev
)
1552 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1555 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1557 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1561 * netif_running - test if up
1562 * @dev: network device
1564 * Test if the device has been brought up.
1566 static inline int netif_running(const struct net_device
*dev
)
1568 return test_bit(__LINK_STATE_START
, &dev
->state
);
1572 * Routines to manage the subqueues on a device. We only need start
1573 * stop, and a check if it's stopped. All other device management is
1574 * done at the overall netdevice level.
1575 * Also test the device if we're multiqueue.
1579 * netif_start_subqueue - allow sending packets on subqueue
1580 * @dev: network device
1581 * @queue_index: sub queue index
1583 * Start individual transmit queue of a device with multiple transmit queues.
1585 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1587 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1589 netif_tx_start_queue(txq
);
1593 * netif_stop_subqueue - stop sending packets on subqueue
1594 * @dev: network device
1595 * @queue_index: sub queue index
1597 * Stop individual transmit queue of a device with multiple transmit queues.
1599 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1601 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1602 #ifdef CONFIG_NETPOLL_TRAP
1606 netif_tx_stop_queue(txq
);
1610 * netif_subqueue_stopped - test status of subqueue
1611 * @dev: network device
1612 * @queue_index: sub queue index
1614 * Check individual transmit queue of a device with multiple transmit queues.
1616 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1619 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1621 return netif_tx_queue_stopped(txq
);
1624 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1625 struct sk_buff
*skb
)
1627 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1631 * netif_wake_subqueue - allow sending packets on subqueue
1632 * @dev: network device
1633 * @queue_index: sub queue index
1635 * Resume individual transmit queue of a device with multiple transmit queues.
1637 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1639 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1640 #ifdef CONFIG_NETPOLL_TRAP
1644 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1645 __netif_schedule(txq
->qdisc
);
1649 * netif_is_multiqueue - test if device has multiple transmit queues
1650 * @dev: network device
1652 * Check if device has multiple transmit queues
1654 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1656 return (dev
->num_tx_queues
> 1);
1659 /* Use this variant when it is known for sure that it
1660 * is executing from hardware interrupt context or with hardware interrupts
1663 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1665 /* Use this variant in places where it could be invoked
1666 * from either hardware interrupt or other context, with hardware interrupts
1667 * either disabled or enabled.
1669 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1671 #define HAVE_NETIF_RX 1
1672 extern int netif_rx(struct sk_buff
*skb
);
1673 extern int netif_rx_ni(struct sk_buff
*skb
);
1674 #define HAVE_NETIF_RECEIVE_SKB 1
1675 extern int netif_receive_skb(struct sk_buff
*skb
);
1676 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
1677 struct sk_buff
*skb
);
1678 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
1679 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
1680 struct sk_buff
*skb
);
1681 extern void napi_reuse_skb(struct napi_struct
*napi
,
1682 struct sk_buff
*skb
);
1683 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1684 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
1685 struct sk_buff
*skb
,
1687 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1688 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
1690 static inline void napi_free_frags(struct napi_struct
*napi
)
1692 kfree_skb(napi
->skb
);
1696 extern void netif_nit_deliver(struct sk_buff
*skb
);
1697 extern int dev_valid_name(const char *name
);
1698 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1699 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1700 extern unsigned dev_get_flags(const struct net_device
*);
1701 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
1702 extern int dev_change_flags(struct net_device
*, unsigned);
1703 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
1704 extern int dev_change_name(struct net_device
*, const char *);
1705 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1706 extern int dev_change_net_namespace(struct net_device
*,
1707 struct net
*, const char *);
1708 extern int dev_set_mtu(struct net_device
*, int);
1709 extern int dev_set_mac_address(struct net_device
*,
1711 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1712 struct net_device
*dev
,
1713 struct netdev_queue
*txq
);
1714 extern int dev_forward_skb(struct net_device
*dev
,
1715 struct sk_buff
*skb
);
1717 extern int netdev_budget
;
1719 /* Called by rtnetlink.c:rtnl_unlock() */
1720 extern void netdev_run_todo(void);
1723 * dev_put - release reference to device
1724 * @dev: network device
1726 * Release reference to device to allow it to be freed.
1728 static inline void dev_put(struct net_device
*dev
)
1730 atomic_dec(&dev
->refcnt
);
1734 * dev_hold - get reference to device
1735 * @dev: network device
1737 * Hold reference to device to keep it from being freed.
1739 static inline void dev_hold(struct net_device
*dev
)
1741 atomic_inc(&dev
->refcnt
);
1744 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1745 * and _off may be called from IRQ context, but it is caller
1746 * who is responsible for serialization of these calls.
1748 * The name carrier is inappropriate, these functions should really be
1749 * called netif_lowerlayer_*() because they represent the state of any
1750 * kind of lower layer not just hardware media.
1753 extern void linkwatch_fire_event(struct net_device
*dev
);
1754 extern void linkwatch_forget_dev(struct net_device
*dev
);
1757 * netif_carrier_ok - test if carrier present
1758 * @dev: network device
1760 * Check if carrier is present on device
1762 static inline int netif_carrier_ok(const struct net_device
*dev
)
1764 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1767 extern unsigned long dev_trans_start(struct net_device
*dev
);
1769 extern void __netdev_watchdog_up(struct net_device
*dev
);
1771 extern void netif_carrier_on(struct net_device
*dev
);
1773 extern void netif_carrier_off(struct net_device
*dev
);
1776 * netif_dormant_on - mark device as dormant.
1777 * @dev: network device
1779 * Mark device as dormant (as per RFC2863).
1781 * The dormant state indicates that the relevant interface is not
1782 * actually in a condition to pass packets (i.e., it is not 'up') but is
1783 * in a "pending" state, waiting for some external event. For "on-
1784 * demand" interfaces, this new state identifies the situation where the
1785 * interface is waiting for events to place it in the up state.
1788 static inline void netif_dormant_on(struct net_device
*dev
)
1790 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1791 linkwatch_fire_event(dev
);
1795 * netif_dormant_off - set device as not dormant.
1796 * @dev: network device
1798 * Device is not in dormant state.
1800 static inline void netif_dormant_off(struct net_device
*dev
)
1802 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1803 linkwatch_fire_event(dev
);
1807 * netif_dormant - test if carrier present
1808 * @dev: network device
1810 * Check if carrier is present on device
1812 static inline int netif_dormant(const struct net_device
*dev
)
1814 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1819 * netif_oper_up - test if device is operational
1820 * @dev: network device
1822 * Check if carrier is operational
1824 static inline int netif_oper_up(const struct net_device
*dev
)
1826 return (dev
->operstate
== IF_OPER_UP
||
1827 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1831 * netif_device_present - is device available or removed
1832 * @dev: network device
1834 * Check if device has not been removed from system.
1836 static inline int netif_device_present(struct net_device
*dev
)
1838 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1841 extern void netif_device_detach(struct net_device
*dev
);
1843 extern void netif_device_attach(struct net_device
*dev
);
1846 * Network interface message level settings
1848 #define HAVE_NETIF_MSG 1
1851 NETIF_MSG_DRV
= 0x0001,
1852 NETIF_MSG_PROBE
= 0x0002,
1853 NETIF_MSG_LINK
= 0x0004,
1854 NETIF_MSG_TIMER
= 0x0008,
1855 NETIF_MSG_IFDOWN
= 0x0010,
1856 NETIF_MSG_IFUP
= 0x0020,
1857 NETIF_MSG_RX_ERR
= 0x0040,
1858 NETIF_MSG_TX_ERR
= 0x0080,
1859 NETIF_MSG_TX_QUEUED
= 0x0100,
1860 NETIF_MSG_INTR
= 0x0200,
1861 NETIF_MSG_TX_DONE
= 0x0400,
1862 NETIF_MSG_RX_STATUS
= 0x0800,
1863 NETIF_MSG_PKTDATA
= 0x1000,
1864 NETIF_MSG_HW
= 0x2000,
1865 NETIF_MSG_WOL
= 0x4000,
1868 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1869 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1870 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1871 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1872 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1873 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1874 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1875 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1876 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1877 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1878 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1879 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1880 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1881 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1882 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1884 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1887 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1888 return default_msg_enable_bits
;
1889 if (debug_value
== 0) /* no output */
1891 /* set low N bits */
1892 return (1 << debug_value
) - 1;
1895 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1897 spin_lock(&txq
->_xmit_lock
);
1898 txq
->xmit_lock_owner
= cpu
;
1901 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1903 spin_lock_bh(&txq
->_xmit_lock
);
1904 txq
->xmit_lock_owner
= smp_processor_id();
1907 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1909 int ok
= spin_trylock(&txq
->_xmit_lock
);
1911 txq
->xmit_lock_owner
= smp_processor_id();
1915 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1917 txq
->xmit_lock_owner
= -1;
1918 spin_unlock(&txq
->_xmit_lock
);
1921 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
1923 txq
->xmit_lock_owner
= -1;
1924 spin_unlock_bh(&txq
->_xmit_lock
);
1927 static inline void txq_trans_update(struct netdev_queue
*txq
)
1929 if (txq
->xmit_lock_owner
!= -1)
1930 txq
->trans_start
= jiffies
;
1934 * netif_tx_lock - grab network device transmit lock
1935 * @dev: network device
1937 * Get network device transmit lock
1939 static inline void netif_tx_lock(struct net_device
*dev
)
1944 spin_lock(&dev
->tx_global_lock
);
1945 cpu
= smp_processor_id();
1946 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1947 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1949 /* We are the only thread of execution doing a
1950 * freeze, but we have to grab the _xmit_lock in
1951 * order to synchronize with threads which are in
1952 * the ->hard_start_xmit() handler and already
1953 * checked the frozen bit.
1955 __netif_tx_lock(txq
, cpu
);
1956 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1957 __netif_tx_unlock(txq
);
1961 static inline void netif_tx_lock_bh(struct net_device
*dev
)
1967 static inline void netif_tx_unlock(struct net_device
*dev
)
1971 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1972 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1974 /* No need to grab the _xmit_lock here. If the
1975 * queue is not stopped for another reason, we
1978 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1979 netif_schedule_queue(txq
);
1981 spin_unlock(&dev
->tx_global_lock
);
1984 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
1986 netif_tx_unlock(dev
);
1990 #define HARD_TX_LOCK(dev, txq, cpu) { \
1991 if ((dev->features & NETIF_F_LLTX) == 0) { \
1992 __netif_tx_lock(txq, cpu); \
1996 #define HARD_TX_UNLOCK(dev, txq) { \
1997 if ((dev->features & NETIF_F_LLTX) == 0) { \
1998 __netif_tx_unlock(txq); \
2002 static inline void netif_tx_disable(struct net_device
*dev
)
2008 cpu
= smp_processor_id();
2009 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2010 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2012 __netif_tx_lock(txq
, cpu
);
2013 netif_tx_stop_queue(txq
);
2014 __netif_tx_unlock(txq
);
2019 static inline void netif_addr_lock(struct net_device
*dev
)
2021 spin_lock(&dev
->addr_list_lock
);
2024 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2026 spin_lock_bh(&dev
->addr_list_lock
);
2029 static inline void netif_addr_unlock(struct net_device
*dev
)
2031 spin_unlock(&dev
->addr_list_lock
);
2034 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2036 spin_unlock_bh(&dev
->addr_list_lock
);
2040 * dev_addrs walker. Should be used only for read access. Call with
2041 * rcu_read_lock held.
2043 #define for_each_dev_addr(dev, ha) \
2044 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2046 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2048 extern void ether_setup(struct net_device
*dev
);
2050 /* Support for loadable net-drivers */
2051 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
2052 void (*setup
)(struct net_device
*),
2053 unsigned int queue_count
);
2054 #define alloc_netdev(sizeof_priv, name, setup) \
2055 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2056 extern int register_netdev(struct net_device
*dev
);
2057 extern void unregister_netdev(struct net_device
*dev
);
2059 /* General hardware address lists handling functions */
2060 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2061 struct netdev_hw_addr_list
*from_list
,
2062 int addr_len
, unsigned char addr_type
);
2063 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2064 struct netdev_hw_addr_list
*from_list
,
2065 int addr_len
, unsigned char addr_type
);
2066 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2067 struct netdev_hw_addr_list
*from_list
,
2069 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2070 struct netdev_hw_addr_list
*from_list
,
2072 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2073 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2075 /* Functions used for device addresses handling */
2076 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2077 unsigned char addr_type
);
2078 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2079 unsigned char addr_type
);
2080 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2081 struct net_device
*from_dev
,
2082 unsigned char addr_type
);
2083 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2084 struct net_device
*from_dev
,
2085 unsigned char addr_type
);
2086 extern void dev_addr_flush(struct net_device
*dev
);
2087 extern int dev_addr_init(struct net_device
*dev
);
2089 /* Functions used for unicast addresses handling */
2090 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2091 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2092 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2093 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2094 extern void dev_uc_flush(struct net_device
*dev
);
2095 extern void dev_uc_init(struct net_device
*dev
);
2097 /* Functions used for multicast addresses handling */
2098 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2099 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2100 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2101 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2102 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2103 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2104 extern void dev_mc_flush(struct net_device
*dev
);
2105 extern void dev_mc_init(struct net_device
*dev
);
2107 /* Functions used for secondary unicast and multicast support */
2108 extern void dev_set_rx_mode(struct net_device
*dev
);
2109 extern void __dev_set_rx_mode(struct net_device
*dev
);
2110 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2111 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2112 extern void netdev_state_change(struct net_device
*dev
);
2113 extern int netdev_bonding_change(struct net_device
*dev
,
2114 unsigned long event
);
2115 extern void netdev_features_change(struct net_device
*dev
);
2116 /* Load a device via the kmod */
2117 extern void dev_load(struct net
*net
, const char *name
);
2118 extern void dev_mcast_init(void);
2119 extern const struct net_device_stats
*dev_get_stats(struct net_device
*dev
);
2120 extern void dev_txq_stats_fold(const struct net_device
*dev
, struct net_device_stats
*stats
);
2122 extern int netdev_max_backlog
;
2123 extern int netdev_tstamp_prequeue
;
2124 extern int weight_p
;
2125 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2126 extern int skb_checksum_help(struct sk_buff
*skb
);
2127 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
2129 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2131 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2135 /* rx skb timestamps */
2136 extern void net_enable_timestamp(void);
2137 extern void net_disable_timestamp(void);
2139 #ifdef CONFIG_PROC_FS
2140 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2141 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2142 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2145 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2146 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2148 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
2150 extern void linkwatch_run_queue(void);
2152 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
2153 unsigned long mask
);
2154 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
2156 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2157 struct net_device
*dev
);
2159 static inline int net_gso_ok(int features
, int gso_type
)
2161 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2162 return (features
& feature
) == feature
;
2165 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
2167 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2168 (!skb_has_frags(skb
) || (features
& NETIF_F_FRAGLIST
));
2171 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
2173 return skb_is_gso(skb
) &&
2174 (!skb_gso_ok(skb
, dev
->features
) ||
2175 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
2178 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2181 dev
->gso_max_size
= size
;
2184 extern int __skb_bond_should_drop(struct sk_buff
*skb
,
2185 struct net_device
*master
);
2187 static inline int skb_bond_should_drop(struct sk_buff
*skb
,
2188 struct net_device
*master
)
2191 return __skb_bond_should_drop(skb
, master
);
2195 extern struct pernet_operations __net_initdata loopback_net_ops
;
2197 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
2198 struct ethtool_cmd
*cmd
)
2200 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
2202 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
2205 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
2207 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
2209 return dev
->ethtool_ops
->get_rx_csum(dev
);
2212 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
2214 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
2216 return dev
->ethtool_ops
->get_flags(dev
);
2219 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2221 /* netdev_printk helpers, similar to dev_printk */
2223 static inline const char *netdev_name(const struct net_device
*dev
)
2225 if (dev
->reg_state
!= NETREG_REGISTERED
)
2226 return "(unregistered net_device)";
2230 #define netdev_printk(level, netdev, format, args...) \
2231 dev_printk(level, (netdev)->dev.parent, \
2233 netdev_name(netdev), ##args)
2235 #define netdev_emerg(dev, format, args...) \
2236 netdev_printk(KERN_EMERG, dev, format, ##args)
2237 #define netdev_alert(dev, format, args...) \
2238 netdev_printk(KERN_ALERT, dev, format, ##args)
2239 #define netdev_crit(dev, format, args...) \
2240 netdev_printk(KERN_CRIT, dev, format, ##args)
2241 #define netdev_err(dev, format, args...) \
2242 netdev_printk(KERN_ERR, dev, format, ##args)
2243 #define netdev_warn(dev, format, args...) \
2244 netdev_printk(KERN_WARNING, dev, format, ##args)
2245 #define netdev_notice(dev, format, args...) \
2246 netdev_printk(KERN_NOTICE, dev, format, ##args)
2247 #define netdev_info(dev, format, args...) \
2248 netdev_printk(KERN_INFO, dev, format, ##args)
2251 #define netdev_dbg(__dev, format, args...) \
2252 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2253 #elif defined(CONFIG_DYNAMIC_DEBUG)
2254 #define netdev_dbg(__dev, format, args...) \
2256 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2257 netdev_name(__dev), ##args); \
2260 #define netdev_dbg(__dev, format, args...) \
2263 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2268 #if defined(VERBOSE_DEBUG)
2269 #define netdev_vdbg netdev_dbg
2272 #define netdev_vdbg(dev, format, args...) \
2275 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2281 * netdev_WARN() acts like dev_printk(), but with the key difference
2282 * of using a WARN/WARN_ON to get the message out, including the
2283 * file/line information and a backtrace.
2285 #define netdev_WARN(dev, format, args...) \
2286 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2288 /* netif printk helpers, similar to netdev_printk */
2290 #define netif_printk(priv, type, level, dev, fmt, args...) \
2292 if (netif_msg_##type(priv)) \
2293 netdev_printk(level, (dev), fmt, ##args); \
2296 #define netif_emerg(priv, type, dev, fmt, args...) \
2297 netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args)
2298 #define netif_alert(priv, type, dev, fmt, args...) \
2299 netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args)
2300 #define netif_crit(priv, type, dev, fmt, args...) \
2301 netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args)
2302 #define netif_err(priv, type, dev, fmt, args...) \
2303 netif_printk(priv, type, KERN_ERR, dev, fmt, ##args)
2304 #define netif_warn(priv, type, dev, fmt, args...) \
2305 netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args)
2306 #define netif_notice(priv, type, dev, fmt, args...) \
2307 netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args)
2308 #define netif_info(priv, type, dev, fmt, args...) \
2309 netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args)
2312 #define netif_dbg(priv, type, dev, format, args...) \
2313 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2314 #elif defined(CONFIG_DYNAMIC_DEBUG)
2315 #define netif_dbg(priv, type, netdev, format, args...) \
2317 if (netif_msg_##type(priv)) \
2318 dynamic_dev_dbg((netdev)->dev.parent, \
2320 netdev_name(netdev), ##args); \
2323 #define netif_dbg(priv, type, dev, format, args...) \
2326 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2331 #if defined(VERBOSE_DEBUG)
2332 #define netif_vdbg netdev_dbg
2334 #define netif_vdbg(priv, type, dev, format, args...) \
2337 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2342 #endif /* __KERNEL__ */
2344 #endif /* _LINUX_NETDEVICE_H */