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)
163 * Old network device statistics. Fields are native words
164 * (unsigned long) so they can be read and written atomically.
165 * Each field is padded to 64 bits for compatibility with
169 #if BITS_PER_LONG == 64
170 #define NET_DEVICE_STATS_DEFINE(name) unsigned long name
171 #elif defined(__LITTLE_ENDIAN)
172 #define NET_DEVICE_STATS_DEFINE(name) unsigned long name, pad_ ## name
174 #define NET_DEVICE_STATS_DEFINE(name) unsigned long pad_ ## name, name
177 struct net_device_stats
{
178 NET_DEVICE_STATS_DEFINE(rx_packets
);
179 NET_DEVICE_STATS_DEFINE(tx_packets
);
180 NET_DEVICE_STATS_DEFINE(rx_bytes
);
181 NET_DEVICE_STATS_DEFINE(tx_bytes
);
182 NET_DEVICE_STATS_DEFINE(rx_errors
);
183 NET_DEVICE_STATS_DEFINE(tx_errors
);
184 NET_DEVICE_STATS_DEFINE(rx_dropped
);
185 NET_DEVICE_STATS_DEFINE(tx_dropped
);
186 NET_DEVICE_STATS_DEFINE(multicast
);
187 NET_DEVICE_STATS_DEFINE(collisions
);
188 NET_DEVICE_STATS_DEFINE(rx_length_errors
);
189 NET_DEVICE_STATS_DEFINE(rx_over_errors
);
190 NET_DEVICE_STATS_DEFINE(rx_crc_errors
);
191 NET_DEVICE_STATS_DEFINE(rx_frame_errors
);
192 NET_DEVICE_STATS_DEFINE(rx_fifo_errors
);
193 NET_DEVICE_STATS_DEFINE(rx_missed_errors
);
194 NET_DEVICE_STATS_DEFINE(tx_aborted_errors
);
195 NET_DEVICE_STATS_DEFINE(tx_carrier_errors
);
196 NET_DEVICE_STATS_DEFINE(tx_fifo_errors
);
197 NET_DEVICE_STATS_DEFINE(tx_heartbeat_errors
);
198 NET_DEVICE_STATS_DEFINE(tx_window_errors
);
199 NET_DEVICE_STATS_DEFINE(rx_compressed
);
200 NET_DEVICE_STATS_DEFINE(tx_compressed
);
203 #endif /* __KERNEL__ */
206 /* Media selection options. */
219 #include <linux/cache.h>
220 #include <linux/skbuff.h>
226 struct netdev_hw_addr
{
227 struct list_head list
;
228 unsigned char addr
[MAX_ADDR_LEN
];
230 #define NETDEV_HW_ADDR_T_LAN 1
231 #define NETDEV_HW_ADDR_T_SAN 2
232 #define NETDEV_HW_ADDR_T_SLAVE 3
233 #define NETDEV_HW_ADDR_T_UNICAST 4
234 #define NETDEV_HW_ADDR_T_MULTICAST 5
238 struct rcu_head rcu_head
;
241 struct netdev_hw_addr_list
{
242 struct list_head list
;
246 #define netdev_hw_addr_list_count(l) ((l)->count)
247 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
248 #define netdev_hw_addr_list_for_each(ha, l) \
249 list_for_each_entry(ha, &(l)->list, list)
251 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
252 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
253 #define netdev_for_each_uc_addr(ha, dev) \
254 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
256 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
257 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
258 #define netdev_for_each_mc_addr(ha, dev) \
259 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
262 struct hh_cache
*hh_next
; /* Next entry */
263 atomic_t hh_refcnt
; /* number of users */
265 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
267 * They are mostly read, but hh_refcnt may be changed quite frequently,
268 * incurring cache line ping pongs.
270 __be16 hh_type ____cacheline_aligned_in_smp
;
271 /* protocol identifier, f.e ETH_P_IP
272 * NOTE: For VLANs, this will be the
273 * encapuslated type. --BLG
275 u16 hh_len
; /* length of header */
276 int (*hh_output
)(struct sk_buff
*skb
);
279 /* cached hardware header; allow for machine alignment needs. */
280 #define HH_DATA_MOD 16
281 #define HH_DATA_OFF(__len) \
282 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
283 #define HH_DATA_ALIGN(__len) \
284 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
285 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
288 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
290 * dev->hard_header_len ? (dev->hard_header_len +
291 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
293 * We could use other alignment values, but we must maintain the
294 * relationship HH alignment <= LL alignment.
296 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
299 #define LL_RESERVED_SPACE(dev) \
300 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
301 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
302 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
303 #define LL_ALLOCATED_SPACE(dev) \
304 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
307 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
308 unsigned short type
, const void *daddr
,
309 const void *saddr
, unsigned len
);
310 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
311 int (*rebuild
)(struct sk_buff
*skb
);
312 #define HAVE_HEADER_CACHE
313 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
);
314 void (*cache_update
)(struct hh_cache
*hh
,
315 const struct net_device
*dev
,
316 const unsigned char *haddr
);
319 /* These flag bits are private to the generic network queueing
320 * layer, they may not be explicitly referenced by any other
324 enum netdev_state_t
{
326 __LINK_STATE_PRESENT
,
327 __LINK_STATE_NOCARRIER
,
328 __LINK_STATE_LINKWATCH_PENDING
,
329 __LINK_STATE_DORMANT
,
334 * This structure holds at boot time configured netdevice settings. They
335 * are then used in the device probing.
337 struct netdev_boot_setup
{
341 #define NETDEV_BOOT_SETUP_MAX 8
343 extern int __init
netdev_boot_setup(char *str
);
346 * Structure for NAPI scheduling similar to tasklet but with weighting
349 /* The poll_list must only be managed by the entity which
350 * changes the state of the NAPI_STATE_SCHED bit. This means
351 * whoever atomically sets that bit can add this napi_struct
352 * to the per-cpu poll_list, and whoever clears that bit
353 * can remove from the list right before clearing the bit.
355 struct list_head poll_list
;
359 int (*poll
)(struct napi_struct
*, int);
360 #ifdef CONFIG_NETPOLL
361 spinlock_t poll_lock
;
365 unsigned int gro_count
;
367 struct net_device
*dev
;
368 struct list_head dev_list
;
369 struct sk_buff
*gro_list
;
374 NAPI_STATE_SCHED
, /* Poll is scheduled */
375 NAPI_STATE_DISABLE
, /* Disable pending */
376 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
386 typedef enum gro_result gro_result_t
;
388 typedef struct sk_buff
*rx_handler_func_t(struct sk_buff
*skb
);
390 extern void __napi_schedule(struct napi_struct
*n
);
392 static inline int napi_disable_pending(struct napi_struct
*n
)
394 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
398 * napi_schedule_prep - check if napi can be scheduled
401 * Test if NAPI routine is already running, and if not mark
402 * it as running. This is used as a condition variable
403 * insure only one NAPI poll instance runs. We also make
404 * sure there is no pending NAPI disable.
406 static inline int napi_schedule_prep(struct napi_struct
*n
)
408 return !napi_disable_pending(n
) &&
409 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
413 * napi_schedule - schedule NAPI poll
416 * Schedule NAPI poll routine to be called if it is not already
419 static inline void napi_schedule(struct napi_struct
*n
)
421 if (napi_schedule_prep(n
))
425 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
426 static inline int napi_reschedule(struct napi_struct
*napi
)
428 if (napi_schedule_prep(napi
)) {
429 __napi_schedule(napi
);
436 * napi_complete - NAPI processing complete
439 * Mark NAPI processing as complete.
441 extern void __napi_complete(struct napi_struct
*n
);
442 extern void napi_complete(struct napi_struct
*n
);
445 * napi_disable - prevent NAPI from scheduling
448 * Stop NAPI from being scheduled on this context.
449 * Waits till any outstanding processing completes.
451 static inline void napi_disable(struct napi_struct
*n
)
453 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
454 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
456 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
460 * napi_enable - enable NAPI scheduling
463 * Resume NAPI from being scheduled on this context.
464 * Must be paired with napi_disable.
466 static inline void napi_enable(struct napi_struct
*n
)
468 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
469 smp_mb__before_clear_bit();
470 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
475 * napi_synchronize - wait until NAPI is not running
478 * Wait until NAPI is done being scheduled on this context.
479 * Waits till any outstanding processing completes but
480 * does not disable future activations.
482 static inline void napi_synchronize(const struct napi_struct
*n
)
484 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
488 # define napi_synchronize(n) barrier()
491 enum netdev_queue_state_t
{
493 __QUEUE_STATE_FROZEN
,
496 struct netdev_queue
{
500 struct net_device
*dev
;
503 struct Qdisc
*qdisc_sleeping
;
507 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
510 * please use this field instead of dev->trans_start
512 unsigned long trans_start
;
513 unsigned long tx_bytes
;
514 unsigned long tx_packets
;
515 unsigned long tx_dropped
;
516 } ____cacheline_aligned_in_smp
;
520 * This structure holds an RPS map which can be of variable length. The
521 * map is an array of CPUs.
528 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
531 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
532 * tail pointer for that CPU's input queue at the time of last enqueue.
534 struct rps_dev_flow
{
537 unsigned int last_qtail
;
541 * The rps_dev_flow_table structure contains a table of flow mappings.
543 struct rps_dev_flow_table
{
546 struct work_struct free_work
;
547 struct rps_dev_flow flows
[0];
549 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
550 (_num * sizeof(struct rps_dev_flow)))
553 * The rps_sock_flow_table contains mappings of flows to the last CPU
554 * on which they were processed by the application (set in recvmsg).
556 struct rps_sock_flow_table
{
560 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
561 (_num * sizeof(u16)))
563 #define RPS_NO_CPU 0xffff
565 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
569 unsigned int cpu
, index
= hash
& table
->mask
;
571 /* We only give a hint, preemption can change cpu under us */
572 cpu
= raw_smp_processor_id();
574 if (table
->ents
[index
] != cpu
)
575 table
->ents
[index
] = cpu
;
579 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
583 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
586 extern struct rps_sock_flow_table
*rps_sock_flow_table
;
588 /* This structure contains an instance of an RX queue. */
589 struct netdev_rx_queue
{
590 struct rps_map
*rps_map
;
591 struct rps_dev_flow_table
*rps_flow_table
;
593 struct netdev_rx_queue
*first
;
595 } ____cacheline_aligned_in_smp
;
596 #endif /* CONFIG_RPS */
599 * This structure defines the management hooks for network devices.
600 * The following hooks can be defined; unless noted otherwise, they are
601 * optional and can be filled with a null pointer.
603 * int (*ndo_init)(struct net_device *dev);
604 * This function is called once when network device is registered.
605 * The network device can use this to any late stage initializaton
606 * or semantic validattion. It can fail with an error code which will
607 * be propogated back to register_netdev
609 * void (*ndo_uninit)(struct net_device *dev);
610 * This function is called when device is unregistered or when registration
611 * fails. It is not called if init fails.
613 * int (*ndo_open)(struct net_device *dev);
614 * This function is called when network device transistions to the up
617 * int (*ndo_stop)(struct net_device *dev);
618 * This function is called when network device transistions to the down
621 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
622 * struct net_device *dev);
623 * Called when a packet needs to be transmitted.
624 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
625 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
626 * Required can not be NULL.
628 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
629 * Called to decide which queue to when device supports multiple
632 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
633 * This function is called to allow device receiver to make
634 * changes to configuration when multicast or promiscious is enabled.
636 * void (*ndo_set_rx_mode)(struct net_device *dev);
637 * This function is called device changes address list filtering.
639 * void (*ndo_set_multicast_list)(struct net_device *dev);
640 * This function is called when the multicast address list changes.
642 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
643 * This function is called when the Media Access Control address
644 * needs to be changed. If this interface is not defined, the
645 * mac address can not be changed.
647 * int (*ndo_validate_addr)(struct net_device *dev);
648 * Test if Media Access Control address is valid for the device.
650 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
651 * Called when a user request an ioctl which can't be handled by
652 * the generic interface code. If not defined ioctl's return
653 * not supported error code.
655 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
656 * Used to set network devices bus interface parameters. This interface
657 * is retained for legacy reason, new devices should use the bus
658 * interface (PCI) for low level management.
660 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
661 * Called when a user wants to change the Maximum Transfer Unit
662 * of a device. If not defined, any request to change MTU will
663 * will return an error.
665 * void (*ndo_tx_timeout)(struct net_device *dev);
666 * Callback uses when the transmitter has not made any progress
667 * for dev->watchdog ticks.
669 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev);
670 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
671 * Called when a user wants to get the network device usage
672 * statistics. Drivers must do one of the following:
673 * 1. Define @ndo_get_stats64 to update a rtnl_link_stats64 structure
674 * (which should normally be dev->stats64) and return a ponter to
675 * it. The structure must not be changed asynchronously.
676 * 2. Define @ndo_get_stats to update a net_device_stats64 structure
677 * (which should normally be dev->stats) and return a pointer to
678 * it. The structure may be changed asynchronously only if each
679 * field is written atomically.
680 * 3. Update dev->stats asynchronously and atomically, and define
683 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
684 * If device support VLAN receive accleration
685 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
686 * when vlan groups for the device changes. Note: grp is NULL
687 * if no vlan's groups are being used.
689 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
690 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
691 * this function is called when a VLAN id is registered.
693 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
694 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
695 * this function is called when a VLAN id is unregistered.
697 * void (*ndo_poll_controller)(struct net_device *dev);
699 * SR-IOV management functions.
700 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
701 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
702 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
703 * int (*ndo_get_vf_config)(struct net_device *dev,
704 * int vf, struct ifla_vf_info *ivf);
705 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
706 * struct nlattr *port[]);
707 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
709 #define HAVE_NET_DEVICE_OPS
710 struct net_device_ops
{
711 int (*ndo_init
)(struct net_device
*dev
);
712 void (*ndo_uninit
)(struct net_device
*dev
);
713 int (*ndo_open
)(struct net_device
*dev
);
714 int (*ndo_stop
)(struct net_device
*dev
);
715 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
716 struct net_device
*dev
);
717 u16 (*ndo_select_queue
)(struct net_device
*dev
,
718 struct sk_buff
*skb
);
719 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
721 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
722 void (*ndo_set_multicast_list
)(struct net_device
*dev
);
723 int (*ndo_set_mac_address
)(struct net_device
*dev
,
725 int (*ndo_validate_addr
)(struct net_device
*dev
);
726 int (*ndo_do_ioctl
)(struct net_device
*dev
,
727 struct ifreq
*ifr
, int cmd
);
728 int (*ndo_set_config
)(struct net_device
*dev
,
730 int (*ndo_change_mtu
)(struct net_device
*dev
,
732 int (*ndo_neigh_setup
)(struct net_device
*dev
,
733 struct neigh_parms
*);
734 void (*ndo_tx_timeout
) (struct net_device
*dev
);
736 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
);
737 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
739 void (*ndo_vlan_rx_register
)(struct net_device
*dev
,
740 struct vlan_group
*grp
);
741 void (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
743 void (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
745 #ifdef CONFIG_NET_POLL_CONTROLLER
746 void (*ndo_poll_controller
)(struct net_device
*dev
);
747 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
748 struct netpoll_info
*info
);
749 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
751 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
753 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
754 int queue
, u16 vlan
, u8 qos
);
755 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
757 int (*ndo_get_vf_config
)(struct net_device
*dev
,
759 struct ifla_vf_info
*ivf
);
760 int (*ndo_set_vf_port
)(struct net_device
*dev
,
762 struct nlattr
*port
[]);
763 int (*ndo_get_vf_port
)(struct net_device
*dev
,
764 int vf
, struct sk_buff
*skb
);
765 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
766 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
767 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
768 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
770 struct scatterlist
*sgl
,
772 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
774 #define NETDEV_FCOE_WWNN 0
775 #define NETDEV_FCOE_WWPN 1
776 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
782 * The DEVICE structure.
783 * Actually, this whole structure is a big mistake. It mixes I/O
784 * data with strictly "high-level" data, and it has to know about
785 * almost every data structure used in the INET module.
787 * FIXME: cleanup struct net_device such that network protocol info
794 * This is the first field of the "visible" part of this structure
795 * (i.e. as seen by users in the "Space.c" file). It is the name
800 struct pm_qos_request_list
*pm_qos_req
;
802 /* device name hash chain */
803 struct hlist_node name_hlist
;
808 * I/O specific fields
809 * FIXME: Merge these and struct ifmap into one
811 unsigned long mem_end
; /* shared mem end */
812 unsigned long mem_start
; /* shared mem start */
813 unsigned long base_addr
; /* device I/O address */
814 unsigned int irq
; /* device IRQ number */
817 * Some hardware also needs these fields, but they are not
818 * part of the usual set specified in Space.c.
821 unsigned char if_port
; /* Selectable AUI, TP,..*/
822 unsigned char dma
; /* DMA channel */
826 struct list_head dev_list
;
827 struct list_head napi_list
;
828 struct list_head unreg_list
;
830 /* Net device features */
831 unsigned long features
;
832 #define NETIF_F_SG 1 /* Scatter/gather IO. */
833 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
834 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
835 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
836 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
837 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
838 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
839 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
840 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
841 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
842 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
843 #define NETIF_F_GSO 2048 /* Enable software GSO. */
844 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
845 /* do not use LLTX in new drivers */
846 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
847 #define NETIF_F_GRO 16384 /* Generic receive offload */
848 #define NETIF_F_LRO 32768 /* large receive offload */
850 /* the GSO_MASK reserves bits 16 through 23 */
851 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
852 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
853 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
854 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
855 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
857 /* Segmentation offload features */
858 #define NETIF_F_GSO_SHIFT 16
859 #define NETIF_F_GSO_MASK 0x00ff0000
860 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
861 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
862 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
863 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
864 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
865 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
867 /* List of features with software fallbacks. */
868 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
871 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
872 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
873 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
874 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
877 * If one device supports one of these features, then enable them
878 * for all in netdev_increment_features.
880 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
881 NETIF_F_SG | NETIF_F_HIGHDMA | \
884 /* Interface index. Unique device identifier */
889 struct rtnl_link_stats64 stats64
;
890 struct net_device_stats stats
;
893 #ifdef CONFIG_WIRELESS_EXT
894 /* List of functions to handle Wireless Extensions (instead of ioctl).
895 * See <net/iw_handler.h> for details. Jean II */
896 const struct iw_handler_def
* wireless_handlers
;
897 /* Instance data managed by the core of Wireless Extensions. */
898 struct iw_public_data
* wireless_data
;
900 /* Management operations */
901 const struct net_device_ops
*netdev_ops
;
902 const struct ethtool_ops
*ethtool_ops
;
904 /* Hardware header description */
905 const struct header_ops
*header_ops
;
907 unsigned int flags
; /* interface flags (a la BSD) */
908 unsigned short gflags
;
909 unsigned short priv_flags
; /* Like 'flags' but invisible to userspace. */
910 unsigned short padded
; /* How much padding added by alloc_netdev() */
912 unsigned char operstate
; /* RFC2863 operstate */
913 unsigned char link_mode
; /* mapping policy to operstate */
915 unsigned int mtu
; /* interface MTU value */
916 unsigned short type
; /* interface hardware type */
917 unsigned short hard_header_len
; /* hardware hdr length */
919 /* extra head- and tailroom the hardware may need, but not in all cases
920 * can this be guaranteed, especially tailroom. Some cases also use
921 * LL_MAX_HEADER instead to allocate the skb.
923 unsigned short needed_headroom
;
924 unsigned short needed_tailroom
;
926 struct net_device
*master
; /* Pointer to master device of a group,
927 * which this device is member of.
930 /* Interface address info. */
931 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
932 unsigned char addr_len
; /* hardware address length */
933 unsigned short dev_id
; /* for shared network cards */
935 spinlock_t addr_list_lock
;
936 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
937 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
939 unsigned int promiscuity
;
940 unsigned int allmulti
;
943 /* Protocol specific pointers */
945 #ifdef CONFIG_NET_DSA
946 void *dsa_ptr
; /* dsa specific data */
948 void *atalk_ptr
; /* AppleTalk link */
949 void *ip_ptr
; /* IPv4 specific data */
950 void *dn_ptr
; /* DECnet specific data */
951 void *ip6_ptr
; /* IPv6 specific data */
952 void *ec_ptr
; /* Econet specific data */
953 void *ax25_ptr
; /* AX.25 specific data */
954 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
955 assign before registering */
958 * Cache line mostly used on receive path (including eth_type_trans())
960 unsigned long last_rx
; /* Time of last Rx */
961 /* Interface address info used in eth_type_trans() */
962 unsigned char *dev_addr
; /* hw address, (before bcast
963 because most packets are
966 struct netdev_hw_addr_list dev_addrs
; /* list of device
969 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
972 struct kset
*queues_kset
;
974 struct netdev_rx_queue
*_rx
;
976 /* Number of RX queues allocated at alloc_netdev_mq() time */
977 unsigned int num_rx_queues
;
980 struct netdev_queue rx_queue
;
981 rx_handler_func_t
*rx_handler
;
982 void *rx_handler_data
;
984 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
986 /* Number of TX queues allocated at alloc_netdev_mq() time */
987 unsigned int num_tx_queues
;
989 /* Number of TX queues currently active in device */
990 unsigned int real_num_tx_queues
;
992 /* root qdisc from userspace point of view */
995 unsigned long tx_queue_len
; /* Max frames per queue allowed */
996 spinlock_t tx_global_lock
;
998 * One part is mostly used on xmit path (device)
1000 /* These may be needed for future network-power-down code. */
1003 * trans_start here is expensive for high speed devices on SMP,
1004 * please use netdev_queue->trans_start instead.
1006 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1008 int watchdog_timeo
; /* used by dev_watchdog() */
1009 struct timer_list watchdog_timer
;
1011 /* Number of references to this device */
1012 atomic_t refcnt ____cacheline_aligned_in_smp
;
1014 /* delayed register/unregister */
1015 struct list_head todo_list
;
1016 /* device index hash chain */
1017 struct hlist_node index_hlist
;
1019 struct list_head link_watch_list
;
1021 /* register/unregister state machine */
1022 enum { NETREG_UNINITIALIZED
=0,
1023 NETREG_REGISTERED
, /* completed register_netdevice */
1024 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1025 NETREG_UNREGISTERED
, /* completed unregister todo */
1026 NETREG_RELEASED
, /* called free_netdev */
1027 NETREG_DUMMY
, /* dummy device for NAPI poll */
1031 RTNL_LINK_INITIALIZED
,
1032 RTNL_LINK_INITIALIZING
,
1033 } rtnl_link_state
:16;
1035 /* Called from unregister, can be used to call free_netdev */
1036 void (*destructor
)(struct net_device
*dev
);
1038 #ifdef CONFIG_NETPOLL
1039 struct netpoll_info
*npinfo
;
1042 #ifdef CONFIG_NET_NS
1043 /* Network namespace this network device is inside */
1047 /* mid-layer private */
1051 struct net_bridge_port
*br_port
;
1053 struct garp_port
*garp_port
;
1055 /* class/net/name entry */
1057 /* space for optional device, statistics, and wireless sysfs groups */
1058 const struct attribute_group
*sysfs_groups
[4];
1060 /* rtnetlink link ops */
1061 const struct rtnl_link_ops
*rtnl_link_ops
;
1063 /* VLAN feature mask */
1064 unsigned long vlan_features
;
1066 /* for setting kernel sock attribute on TCP connection setup */
1067 #define GSO_MAX_SIZE 65536
1068 unsigned int gso_max_size
;
1071 /* Data Center Bridging netlink ops */
1072 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1075 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1076 /* max exchange id for FCoE LRO by ddp */
1077 unsigned int fcoe_ddp_xid
;
1079 /* n-tuple filter list attached to this device */
1080 struct ethtool_rx_ntuple_list ethtool_ntuple_list
;
1082 #define to_net_dev(d) container_of(d, struct net_device, dev)
1084 #define NETDEV_ALIGN 32
1087 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1090 return &dev
->_tx
[index
];
1093 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1094 void (*f
)(struct net_device
*,
1095 struct netdev_queue
*,
1101 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1102 f(dev
, &dev
->_tx
[i
], arg
);
1106 * Net namespace inlines
1109 struct net
*dev_net(const struct net_device
*dev
)
1111 return read_pnet(&dev
->nd_net
);
1115 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1117 #ifdef CONFIG_NET_NS
1118 release_net(dev
->nd_net
);
1119 dev
->nd_net
= hold_net(net
);
1123 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1125 #ifdef CONFIG_NET_DSA_TAG_DSA
1126 if (dev
->dsa_ptr
!= NULL
)
1127 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1133 #ifndef CONFIG_NET_NS
1134 static inline void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
)
1138 #else /* CONFIG_NET_NS */
1139 void skb_set_dev(struct sk_buff
*skb
, struct net_device
*dev
);
1142 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1144 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1145 if (dev
->dsa_ptr
!= NULL
)
1146 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1153 * netdev_priv - access network device private data
1154 * @dev: network device
1156 * Get network device private data
1158 static inline void *netdev_priv(const struct net_device
*dev
)
1160 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1163 /* Set the sysfs physical device reference for the network logical device
1164 * if set prior to registration will cause a symlink during initialization.
1166 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1168 /* Set the sysfs device type for the network logical device to allow
1169 * fin grained indentification of different network device types. For
1170 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1172 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1175 * netif_napi_add - initialize a napi context
1176 * @dev: network device
1177 * @napi: napi context
1178 * @poll: polling function
1179 * @weight: default weight
1181 * netif_napi_add() must be used to initialize a napi context prior to calling
1182 * *any* of the other napi related functions.
1184 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1185 int (*poll
)(struct napi_struct
*, int), int weight
);
1188 * netif_napi_del - remove a napi context
1189 * @napi: napi context
1191 * netif_napi_del() removes a napi context from the network device napi list
1193 void netif_napi_del(struct napi_struct
*napi
);
1195 struct napi_gro_cb
{
1196 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1199 /* Length of frag0. */
1200 unsigned int frag0_len
;
1202 /* This indicates where we are processing relative to skb->data. */
1205 /* This is non-zero if the packet may be of the same flow. */
1208 /* This is non-zero if the packet cannot be merged with the new skb. */
1211 /* Number of segments aggregated. */
1218 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1220 struct packet_type
{
1221 __be16 type
; /* This is really htons(ether_type). */
1222 struct net_device
*dev
; /* NULL is wildcarded here */
1223 int (*func
) (struct sk_buff
*,
1224 struct net_device
*,
1225 struct packet_type
*,
1226 struct net_device
*);
1227 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1229 int (*gso_send_check
)(struct sk_buff
*skb
);
1230 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1231 struct sk_buff
*skb
);
1232 int (*gro_complete
)(struct sk_buff
*skb
);
1233 void *af_packet_priv
;
1234 struct list_head list
;
1237 #include <linux/interrupt.h>
1238 #include <linux/notifier.h>
1240 extern rwlock_t dev_base_lock
; /* Device list lock */
1243 #define for_each_netdev(net, d) \
1244 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1245 #define for_each_netdev_reverse(net, d) \
1246 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1247 #define for_each_netdev_rcu(net, d) \
1248 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1249 #define for_each_netdev_safe(net, d, n) \
1250 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1251 #define for_each_netdev_continue(net, d) \
1252 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1253 #define for_each_netdev_continue_rcu(net, d) \
1254 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1255 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1257 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1259 struct list_head
*lh
;
1263 lh
= dev
->dev_list
.next
;
1264 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1267 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1269 struct list_head
*lh
;
1273 lh
= rcu_dereference(dev
->dev_list
.next
);
1274 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1277 static inline struct net_device
*first_net_device(struct net
*net
)
1279 return list_empty(&net
->dev_base_head
) ? NULL
:
1280 net_device_entry(net
->dev_base_head
.next
);
1283 extern int netdev_boot_setup_check(struct net_device
*dev
);
1284 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1285 extern struct net_device
*dev_getbyhwaddr(struct net
*net
, unsigned short type
, char *hwaddr
);
1286 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1287 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1288 extern void dev_add_pack(struct packet_type
*pt
);
1289 extern void dev_remove_pack(struct packet_type
*pt
);
1290 extern void __dev_remove_pack(struct packet_type
*pt
);
1292 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1293 unsigned short mask
);
1294 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1295 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1296 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1297 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1298 extern int dev_open(struct net_device
*dev
);
1299 extern int dev_close(struct net_device
*dev
);
1300 extern void dev_disable_lro(struct net_device
*dev
);
1301 extern int dev_queue_xmit(struct sk_buff
*skb
);
1302 extern int register_netdevice(struct net_device
*dev
);
1303 extern void unregister_netdevice_queue(struct net_device
*dev
,
1304 struct list_head
*head
);
1305 extern void unregister_netdevice_many(struct list_head
*head
);
1306 static inline void unregister_netdevice(struct net_device
*dev
)
1308 unregister_netdevice_queue(dev
, NULL
);
1311 extern void free_netdev(struct net_device
*dev
);
1312 extern void synchronize_net(void);
1313 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1314 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1315 extern int init_dummy_netdev(struct net_device
*dev
);
1316 extern void netdev_resync_ops(struct net_device
*dev
);
1318 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1319 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1320 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1321 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1322 extern int dev_restart(struct net_device
*dev
);
1323 #ifdef CONFIG_NETPOLL_TRAP
1324 extern int netpoll_trap(void);
1326 extern int skb_gro_receive(struct sk_buff
**head
,
1327 struct sk_buff
*skb
);
1328 extern void skb_gro_reset_offset(struct sk_buff
*skb
);
1330 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1332 return NAPI_GRO_CB(skb
)->data_offset
;
1335 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1337 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1340 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1342 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1345 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1346 unsigned int offset
)
1348 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1351 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1353 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1356 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1357 unsigned int offset
)
1359 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1360 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1361 return pskb_may_pull(skb
, hlen
) ? skb
->data
+ offset
: NULL
;
1364 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1366 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1369 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1371 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1372 skb_network_offset(skb
);
1375 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1376 unsigned short type
,
1377 const void *daddr
, const void *saddr
,
1380 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1383 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1386 static inline int dev_parse_header(const struct sk_buff
*skb
,
1387 unsigned char *haddr
)
1389 const struct net_device
*dev
= skb
->dev
;
1391 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1393 return dev
->header_ops
->parse(skb
, haddr
);
1396 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1397 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1398 static inline int unregister_gifconf(unsigned int family
)
1400 return register_gifconf(family
, NULL
);
1404 * Incoming packets are placed on per-cpu queues
1406 struct softnet_data
{
1407 struct Qdisc
*output_queue
;
1408 struct Qdisc
**output_queue_tailp
;
1409 struct list_head poll_list
;
1410 struct sk_buff
*completion_queue
;
1411 struct sk_buff_head process_queue
;
1414 unsigned int processed
;
1415 unsigned int time_squeeze
;
1416 unsigned int cpu_collision
;
1417 unsigned int received_rps
;
1420 struct softnet_data
*rps_ipi_list
;
1422 /* Elements below can be accessed between CPUs for RPS */
1423 struct call_single_data csd ____cacheline_aligned_in_smp
;
1424 struct softnet_data
*rps_ipi_next
;
1426 unsigned int input_queue_head
;
1427 unsigned int input_queue_tail
;
1430 struct sk_buff_head input_pkt_queue
;
1431 struct napi_struct backlog
;
1434 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1437 sd
->input_queue_head
++;
1441 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1442 unsigned int *qtail
)
1445 *qtail
= ++sd
->input_queue_tail
;
1449 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1451 #define HAVE_NETIF_QUEUE
1453 extern void __netif_schedule(struct Qdisc
*q
);
1455 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1457 if (!test_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1458 __netif_schedule(txq
->qdisc
);
1461 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1465 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1466 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1469 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1471 clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1475 * netif_start_queue - allow transmit
1476 * @dev: network device
1478 * Allow upper layers to call the device hard_start_xmit routine.
1480 static inline void netif_start_queue(struct net_device
*dev
)
1482 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1485 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1489 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1490 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1491 netif_tx_start_queue(txq
);
1495 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1497 #ifdef CONFIG_NETPOLL_TRAP
1498 if (netpoll_trap()) {
1499 netif_tx_start_queue(dev_queue
);
1503 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
))
1504 __netif_schedule(dev_queue
->qdisc
);
1508 * netif_wake_queue - restart transmit
1509 * @dev: network device
1511 * Allow upper layers to call the device hard_start_xmit routine.
1512 * Used for flow control when transmit resources are available.
1514 static inline void netif_wake_queue(struct net_device
*dev
)
1516 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1519 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1523 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1524 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1525 netif_tx_wake_queue(txq
);
1529 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1531 set_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1535 * netif_stop_queue - stop transmitted packets
1536 * @dev: network device
1538 * Stop upper layers calling the device hard_start_xmit routine.
1539 * Used for flow control when transmit resources are unavailable.
1541 static inline void netif_stop_queue(struct net_device
*dev
)
1543 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1546 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1550 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1551 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1552 netif_tx_stop_queue(txq
);
1556 static inline int netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1558 return test_bit(__QUEUE_STATE_XOFF
, &dev_queue
->state
);
1562 * netif_queue_stopped - test if transmit queue is flowblocked
1563 * @dev: network device
1565 * Test if transmit queue on device is currently unable to send.
1567 static inline int netif_queue_stopped(const struct net_device
*dev
)
1569 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1572 static inline int netif_tx_queue_frozen(const struct netdev_queue
*dev_queue
)
1574 return test_bit(__QUEUE_STATE_FROZEN
, &dev_queue
->state
);
1578 * netif_running - test if up
1579 * @dev: network device
1581 * Test if the device has been brought up.
1583 static inline int netif_running(const struct net_device
*dev
)
1585 return test_bit(__LINK_STATE_START
, &dev
->state
);
1589 * Routines to manage the subqueues on a device. We only need start
1590 * stop, and a check if it's stopped. All other device management is
1591 * done at the overall netdevice level.
1592 * Also test the device if we're multiqueue.
1596 * netif_start_subqueue - allow sending packets on subqueue
1597 * @dev: network device
1598 * @queue_index: sub queue index
1600 * Start individual transmit queue of a device with multiple transmit queues.
1602 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
1604 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1606 netif_tx_start_queue(txq
);
1610 * netif_stop_subqueue - stop sending packets on subqueue
1611 * @dev: network device
1612 * @queue_index: sub queue index
1614 * Stop individual transmit queue of a device with multiple transmit queues.
1616 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
1618 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1619 #ifdef CONFIG_NETPOLL_TRAP
1623 netif_tx_stop_queue(txq
);
1627 * netif_subqueue_stopped - test status of subqueue
1628 * @dev: network device
1629 * @queue_index: sub queue index
1631 * Check individual transmit queue of a device with multiple transmit queues.
1633 static inline int __netif_subqueue_stopped(const struct net_device
*dev
,
1636 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1638 return netif_tx_queue_stopped(txq
);
1641 static inline int netif_subqueue_stopped(const struct net_device
*dev
,
1642 struct sk_buff
*skb
)
1644 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
1648 * netif_wake_subqueue - allow sending packets on subqueue
1649 * @dev: network device
1650 * @queue_index: sub queue index
1652 * Resume individual transmit queue of a device with multiple transmit queues.
1654 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
1656 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
1657 #ifdef CONFIG_NETPOLL_TRAP
1661 if (test_and_clear_bit(__QUEUE_STATE_XOFF
, &txq
->state
))
1662 __netif_schedule(txq
->qdisc
);
1666 * netif_is_multiqueue - test if device has multiple transmit queues
1667 * @dev: network device
1669 * Check if device has multiple transmit queues
1671 static inline int netif_is_multiqueue(const struct net_device
*dev
)
1673 return (dev
->num_tx_queues
> 1);
1676 /* Use this variant when it is known for sure that it
1677 * is executing from hardware interrupt context or with hardware interrupts
1680 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
1682 /* Use this variant in places where it could be invoked
1683 * from either hardware interrupt or other context, with hardware interrupts
1684 * either disabled or enabled.
1686 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
1688 #define HAVE_NETIF_RX 1
1689 extern int netif_rx(struct sk_buff
*skb
);
1690 extern int netif_rx_ni(struct sk_buff
*skb
);
1691 #define HAVE_NETIF_RECEIVE_SKB 1
1692 extern int netif_receive_skb(struct sk_buff
*skb
);
1693 extern gro_result_t
dev_gro_receive(struct napi_struct
*napi
,
1694 struct sk_buff
*skb
);
1695 extern gro_result_t
napi_skb_finish(gro_result_t ret
, struct sk_buff
*skb
);
1696 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
1697 struct sk_buff
*skb
);
1698 extern void napi_reuse_skb(struct napi_struct
*napi
,
1699 struct sk_buff
*skb
);
1700 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
1701 extern gro_result_t
napi_frags_finish(struct napi_struct
*napi
,
1702 struct sk_buff
*skb
,
1704 extern struct sk_buff
* napi_frags_skb(struct napi_struct
*napi
);
1705 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
1707 static inline void napi_free_frags(struct napi_struct
*napi
)
1709 kfree_skb(napi
->skb
);
1713 extern int netdev_rx_handler_register(struct net_device
*dev
,
1714 rx_handler_func_t
*rx_handler
,
1715 void *rx_handler_data
);
1716 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
1718 extern void netif_nit_deliver(struct sk_buff
*skb
);
1719 extern int dev_valid_name(const char *name
);
1720 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
1721 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
1722 extern unsigned dev_get_flags(const struct net_device
*);
1723 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
1724 extern int dev_change_flags(struct net_device
*, unsigned);
1725 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
1726 extern int dev_change_name(struct net_device
*, const char *);
1727 extern int dev_set_alias(struct net_device
*, const char *, size_t);
1728 extern int dev_change_net_namespace(struct net_device
*,
1729 struct net
*, const char *);
1730 extern int dev_set_mtu(struct net_device
*, int);
1731 extern int dev_set_mac_address(struct net_device
*,
1733 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
1734 struct net_device
*dev
,
1735 struct netdev_queue
*txq
);
1736 extern int dev_forward_skb(struct net_device
*dev
,
1737 struct sk_buff
*skb
);
1739 extern int netdev_budget
;
1741 /* Called by rtnetlink.c:rtnl_unlock() */
1742 extern void netdev_run_todo(void);
1745 * dev_put - release reference to device
1746 * @dev: network device
1748 * Release reference to device to allow it to be freed.
1750 static inline void dev_put(struct net_device
*dev
)
1752 atomic_dec(&dev
->refcnt
);
1756 * dev_hold - get reference to device
1757 * @dev: network device
1759 * Hold reference to device to keep it from being freed.
1761 static inline void dev_hold(struct net_device
*dev
)
1763 atomic_inc(&dev
->refcnt
);
1766 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1767 * and _off may be called from IRQ context, but it is caller
1768 * who is responsible for serialization of these calls.
1770 * The name carrier is inappropriate, these functions should really be
1771 * called netif_lowerlayer_*() because they represent the state of any
1772 * kind of lower layer not just hardware media.
1775 extern void linkwatch_fire_event(struct net_device
*dev
);
1776 extern void linkwatch_forget_dev(struct net_device
*dev
);
1779 * netif_carrier_ok - test if carrier present
1780 * @dev: network device
1782 * Check if carrier is present on device
1784 static inline int netif_carrier_ok(const struct net_device
*dev
)
1786 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
1789 extern unsigned long dev_trans_start(struct net_device
*dev
);
1791 extern void __netdev_watchdog_up(struct net_device
*dev
);
1793 extern void netif_carrier_on(struct net_device
*dev
);
1795 extern void netif_carrier_off(struct net_device
*dev
);
1797 extern void netif_notify_peers(struct net_device
*dev
);
1800 * netif_dormant_on - mark device as dormant.
1801 * @dev: network device
1803 * Mark device as dormant (as per RFC2863).
1805 * The dormant state indicates that the relevant interface is not
1806 * actually in a condition to pass packets (i.e., it is not 'up') but is
1807 * in a "pending" state, waiting for some external event. For "on-
1808 * demand" interfaces, this new state identifies the situation where the
1809 * interface is waiting for events to place it in the up state.
1812 static inline void netif_dormant_on(struct net_device
*dev
)
1814 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1815 linkwatch_fire_event(dev
);
1819 * netif_dormant_off - set device as not dormant.
1820 * @dev: network device
1822 * Device is not in dormant state.
1824 static inline void netif_dormant_off(struct net_device
*dev
)
1826 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
1827 linkwatch_fire_event(dev
);
1831 * netif_dormant - test if carrier present
1832 * @dev: network device
1834 * Check if carrier is present on device
1836 static inline int netif_dormant(const struct net_device
*dev
)
1838 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
1843 * netif_oper_up - test if device is operational
1844 * @dev: network device
1846 * Check if carrier is operational
1848 static inline int netif_oper_up(const struct net_device
*dev
)
1850 return (dev
->operstate
== IF_OPER_UP
||
1851 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
1855 * netif_device_present - is device available or removed
1856 * @dev: network device
1858 * Check if device has not been removed from system.
1860 static inline int netif_device_present(struct net_device
*dev
)
1862 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
1865 extern void netif_device_detach(struct net_device
*dev
);
1867 extern void netif_device_attach(struct net_device
*dev
);
1870 * Network interface message level settings
1872 #define HAVE_NETIF_MSG 1
1875 NETIF_MSG_DRV
= 0x0001,
1876 NETIF_MSG_PROBE
= 0x0002,
1877 NETIF_MSG_LINK
= 0x0004,
1878 NETIF_MSG_TIMER
= 0x0008,
1879 NETIF_MSG_IFDOWN
= 0x0010,
1880 NETIF_MSG_IFUP
= 0x0020,
1881 NETIF_MSG_RX_ERR
= 0x0040,
1882 NETIF_MSG_TX_ERR
= 0x0080,
1883 NETIF_MSG_TX_QUEUED
= 0x0100,
1884 NETIF_MSG_INTR
= 0x0200,
1885 NETIF_MSG_TX_DONE
= 0x0400,
1886 NETIF_MSG_RX_STATUS
= 0x0800,
1887 NETIF_MSG_PKTDATA
= 0x1000,
1888 NETIF_MSG_HW
= 0x2000,
1889 NETIF_MSG_WOL
= 0x4000,
1892 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1893 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1894 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1895 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1896 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1897 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1898 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1899 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1900 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1901 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1902 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1903 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1904 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1905 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1906 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1908 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
1911 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
1912 return default_msg_enable_bits
;
1913 if (debug_value
== 0) /* no output */
1915 /* set low N bits */
1916 return (1 << debug_value
) - 1;
1919 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
1921 spin_lock(&txq
->_xmit_lock
);
1922 txq
->xmit_lock_owner
= cpu
;
1925 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
1927 spin_lock_bh(&txq
->_xmit_lock
);
1928 txq
->xmit_lock_owner
= smp_processor_id();
1931 static inline int __netif_tx_trylock(struct netdev_queue
*txq
)
1933 int ok
= spin_trylock(&txq
->_xmit_lock
);
1935 txq
->xmit_lock_owner
= smp_processor_id();
1939 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
1941 txq
->xmit_lock_owner
= -1;
1942 spin_unlock(&txq
->_xmit_lock
);
1945 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
1947 txq
->xmit_lock_owner
= -1;
1948 spin_unlock_bh(&txq
->_xmit_lock
);
1951 static inline void txq_trans_update(struct netdev_queue
*txq
)
1953 if (txq
->xmit_lock_owner
!= -1)
1954 txq
->trans_start
= jiffies
;
1958 * netif_tx_lock - grab network device transmit lock
1959 * @dev: network device
1961 * Get network device transmit lock
1963 static inline void netif_tx_lock(struct net_device
*dev
)
1968 spin_lock(&dev
->tx_global_lock
);
1969 cpu
= smp_processor_id();
1970 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1971 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1973 /* We are the only thread of execution doing a
1974 * freeze, but we have to grab the _xmit_lock in
1975 * order to synchronize with threads which are in
1976 * the ->hard_start_xmit() handler and already
1977 * checked the frozen bit.
1979 __netif_tx_lock(txq
, cpu
);
1980 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
1981 __netif_tx_unlock(txq
);
1985 static inline void netif_tx_lock_bh(struct net_device
*dev
)
1991 static inline void netif_tx_unlock(struct net_device
*dev
)
1995 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1996 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1998 /* No need to grab the _xmit_lock here. If the
1999 * queue is not stopped for another reason, we
2002 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2003 netif_schedule_queue(txq
);
2005 spin_unlock(&dev
->tx_global_lock
);
2008 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2010 netif_tx_unlock(dev
);
2014 #define HARD_TX_LOCK(dev, txq, cpu) { \
2015 if ((dev->features & NETIF_F_LLTX) == 0) { \
2016 __netif_tx_lock(txq, cpu); \
2020 #define HARD_TX_UNLOCK(dev, txq) { \
2021 if ((dev->features & NETIF_F_LLTX) == 0) { \
2022 __netif_tx_unlock(txq); \
2026 static inline void netif_tx_disable(struct net_device
*dev
)
2032 cpu
= smp_processor_id();
2033 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2034 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2036 __netif_tx_lock(txq
, cpu
);
2037 netif_tx_stop_queue(txq
);
2038 __netif_tx_unlock(txq
);
2043 static inline void netif_addr_lock(struct net_device
*dev
)
2045 spin_lock(&dev
->addr_list_lock
);
2048 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2050 spin_lock_bh(&dev
->addr_list_lock
);
2053 static inline void netif_addr_unlock(struct net_device
*dev
)
2055 spin_unlock(&dev
->addr_list_lock
);
2058 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2060 spin_unlock_bh(&dev
->addr_list_lock
);
2064 * dev_addrs walker. Should be used only for read access. Call with
2065 * rcu_read_lock held.
2067 #define for_each_dev_addr(dev, ha) \
2068 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2070 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2072 extern void ether_setup(struct net_device
*dev
);
2074 /* Support for loadable net-drivers */
2075 extern struct net_device
*alloc_netdev_mq(int sizeof_priv
, const char *name
,
2076 void (*setup
)(struct net_device
*),
2077 unsigned int queue_count
);
2078 #define alloc_netdev(sizeof_priv, name, setup) \
2079 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2080 extern int register_netdev(struct net_device
*dev
);
2081 extern void unregister_netdev(struct net_device
*dev
);
2083 /* General hardware address lists handling functions */
2084 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2085 struct netdev_hw_addr_list
*from_list
,
2086 int addr_len
, unsigned char addr_type
);
2087 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2088 struct netdev_hw_addr_list
*from_list
,
2089 int addr_len
, unsigned char addr_type
);
2090 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2091 struct netdev_hw_addr_list
*from_list
,
2093 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2094 struct netdev_hw_addr_list
*from_list
,
2096 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2097 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2099 /* Functions used for device addresses handling */
2100 extern int dev_addr_add(struct net_device
*dev
, unsigned char *addr
,
2101 unsigned char addr_type
);
2102 extern int dev_addr_del(struct net_device
*dev
, unsigned char *addr
,
2103 unsigned char addr_type
);
2104 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2105 struct net_device
*from_dev
,
2106 unsigned char addr_type
);
2107 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2108 struct net_device
*from_dev
,
2109 unsigned char addr_type
);
2110 extern void dev_addr_flush(struct net_device
*dev
);
2111 extern int dev_addr_init(struct net_device
*dev
);
2113 /* Functions used for unicast addresses handling */
2114 extern int dev_uc_add(struct net_device
*dev
, unsigned char *addr
);
2115 extern int dev_uc_del(struct net_device
*dev
, unsigned char *addr
);
2116 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2117 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2118 extern void dev_uc_flush(struct net_device
*dev
);
2119 extern void dev_uc_init(struct net_device
*dev
);
2121 /* Functions used for multicast addresses handling */
2122 extern int dev_mc_add(struct net_device
*dev
, unsigned char *addr
);
2123 extern int dev_mc_add_global(struct net_device
*dev
, unsigned char *addr
);
2124 extern int dev_mc_del(struct net_device
*dev
, unsigned char *addr
);
2125 extern int dev_mc_del_global(struct net_device
*dev
, unsigned char *addr
);
2126 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2127 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2128 extern void dev_mc_flush(struct net_device
*dev
);
2129 extern void dev_mc_init(struct net_device
*dev
);
2131 /* Functions used for secondary unicast and multicast support */
2132 extern void dev_set_rx_mode(struct net_device
*dev
);
2133 extern void __dev_set_rx_mode(struct net_device
*dev
);
2134 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2135 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2136 extern void netdev_state_change(struct net_device
*dev
);
2137 extern int netdev_bonding_change(struct net_device
*dev
,
2138 unsigned long event
);
2139 extern void netdev_features_change(struct net_device
*dev
);
2140 /* Load a device via the kmod */
2141 extern void dev_load(struct net
*net
, const char *name
);
2142 extern void dev_mcast_init(void);
2143 extern const struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
);
2144 extern void dev_txq_stats_fold(const struct net_device
*dev
, struct net_device_stats
*stats
);
2146 extern int netdev_max_backlog
;
2147 extern int netdev_tstamp_prequeue
;
2148 extern int weight_p
;
2149 extern int netdev_set_master(struct net_device
*dev
, struct net_device
*master
);
2150 extern int skb_checksum_help(struct sk_buff
*skb
);
2151 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, int features
);
2153 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2155 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2159 /* rx skb timestamps */
2160 extern void net_enable_timestamp(void);
2161 extern void net_disable_timestamp(void);
2163 #ifdef CONFIG_PROC_FS
2164 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2165 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2166 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2169 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2170 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2172 extern char *netdev_drivername(const struct net_device
*dev
, char *buffer
, int len
);
2174 extern void linkwatch_run_queue(void);
2176 unsigned long netdev_increment_features(unsigned long all
, unsigned long one
,
2177 unsigned long mask
);
2178 unsigned long netdev_fix_features(unsigned long features
, const char *name
);
2180 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2181 struct net_device
*dev
);
2183 static inline int net_gso_ok(int features
, int gso_type
)
2185 int feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2186 return (features
& feature
) == feature
;
2189 static inline int skb_gso_ok(struct sk_buff
*skb
, int features
)
2191 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2192 (!skb_has_frags(skb
) || (features
& NETIF_F_FRAGLIST
));
2195 static inline int netif_needs_gso(struct net_device
*dev
, struct sk_buff
*skb
)
2197 return skb_is_gso(skb
) &&
2198 (!skb_gso_ok(skb
, dev
->features
) ||
2199 unlikely(skb
->ip_summed
!= CHECKSUM_PARTIAL
));
2202 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2205 dev
->gso_max_size
= size
;
2208 extern int __skb_bond_should_drop(struct sk_buff
*skb
,
2209 struct net_device
*master
);
2211 static inline int skb_bond_should_drop(struct sk_buff
*skb
,
2212 struct net_device
*master
)
2215 return __skb_bond_should_drop(skb
, master
);
2219 extern struct pernet_operations __net_initdata loopback_net_ops
;
2221 static inline int dev_ethtool_get_settings(struct net_device
*dev
,
2222 struct ethtool_cmd
*cmd
)
2224 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_settings
)
2226 return dev
->ethtool_ops
->get_settings(dev
, cmd
);
2229 static inline u32
dev_ethtool_get_rx_csum(struct net_device
*dev
)
2231 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_rx_csum
)
2233 return dev
->ethtool_ops
->get_rx_csum(dev
);
2236 static inline u32
dev_ethtool_get_flags(struct net_device
*dev
)
2238 if (!dev
->ethtool_ops
|| !dev
->ethtool_ops
->get_flags
)
2240 return dev
->ethtool_ops
->get_flags(dev
);
2243 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2245 /* netdev_printk helpers, similar to dev_printk */
2247 static inline const char *netdev_name(const struct net_device
*dev
)
2249 if (dev
->reg_state
!= NETREG_REGISTERED
)
2250 return "(unregistered net_device)";
2254 #define netdev_printk(level, netdev, format, args...) \
2255 dev_printk(level, (netdev)->dev.parent, \
2257 netdev_name(netdev), ##args)
2259 #define netdev_emerg(dev, format, args...) \
2260 netdev_printk(KERN_EMERG, dev, format, ##args)
2261 #define netdev_alert(dev, format, args...) \
2262 netdev_printk(KERN_ALERT, dev, format, ##args)
2263 #define netdev_crit(dev, format, args...) \
2264 netdev_printk(KERN_CRIT, dev, format, ##args)
2265 #define netdev_err(dev, format, args...) \
2266 netdev_printk(KERN_ERR, dev, format, ##args)
2267 #define netdev_warn(dev, format, args...) \
2268 netdev_printk(KERN_WARNING, dev, format, ##args)
2269 #define netdev_notice(dev, format, args...) \
2270 netdev_printk(KERN_NOTICE, dev, format, ##args)
2271 #define netdev_info(dev, format, args...) \
2272 netdev_printk(KERN_INFO, dev, format, ##args)
2275 #define netdev_dbg(__dev, format, args...) \
2276 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2277 #elif defined(CONFIG_DYNAMIC_DEBUG)
2278 #define netdev_dbg(__dev, format, args...) \
2280 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2281 netdev_name(__dev), ##args); \
2284 #define netdev_dbg(__dev, format, args...) \
2287 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2292 #if defined(VERBOSE_DEBUG)
2293 #define netdev_vdbg netdev_dbg
2296 #define netdev_vdbg(dev, format, args...) \
2299 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2305 * netdev_WARN() acts like dev_printk(), but with the key difference
2306 * of using a WARN/WARN_ON to get the message out, including the
2307 * file/line information and a backtrace.
2309 #define netdev_WARN(dev, format, args...) \
2310 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2312 /* netif printk helpers, similar to netdev_printk */
2314 #define netif_printk(priv, type, level, dev, fmt, args...) \
2316 if (netif_msg_##type(priv)) \
2317 netdev_printk(level, (dev), fmt, ##args); \
2320 #define netif_emerg(priv, type, dev, fmt, args...) \
2321 netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args)
2322 #define netif_alert(priv, type, dev, fmt, args...) \
2323 netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args)
2324 #define netif_crit(priv, type, dev, fmt, args...) \
2325 netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args)
2326 #define netif_err(priv, type, dev, fmt, args...) \
2327 netif_printk(priv, type, KERN_ERR, dev, fmt, ##args)
2328 #define netif_warn(priv, type, dev, fmt, args...) \
2329 netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args)
2330 #define netif_notice(priv, type, dev, fmt, args...) \
2331 netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args)
2332 #define netif_info(priv, type, dev, fmt, args...) \
2333 netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args)
2336 #define netif_dbg(priv, type, dev, format, args...) \
2337 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2338 #elif defined(CONFIG_DYNAMIC_DEBUG)
2339 #define netif_dbg(priv, type, netdev, format, args...) \
2341 if (netif_msg_##type(priv)) \
2342 dynamic_dev_dbg((netdev)->dev.parent, \
2344 netdev_name(netdev), ##args); \
2347 #define netif_dbg(priv, type, dev, format, args...) \
2350 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2355 #if defined(VERBOSE_DEBUG)
2356 #define netif_vdbg netdev_dbg
2358 #define netif_vdbg(priv, type, dev, format, args...) \
2361 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2366 #endif /* __KERNEL__ */
2368 #endif /* _LINUX_NETDEVICE_H */