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.
167 struct net_device_stats {
168 unsigned long rx_packets;
169 unsigned long tx_packets;
170 unsigned long rx_bytes;
171 unsigned long tx_bytes;
172 unsigned long rx_errors;
173 unsigned long tx_errors;
174 unsigned long rx_dropped;
175 unsigned long tx_dropped;
176 unsigned long multicast;
177 unsigned long collisions;
178 unsigned long rx_length_errors;
179 unsigned long rx_over_errors;
180 unsigned long rx_crc_errors;
181 unsigned long rx_frame_errors;
182 unsigned long rx_fifo_errors;
183 unsigned long rx_missed_errors;
184 unsigned long tx_aborted_errors;
185 unsigned long tx_carrier_errors;
186 unsigned long tx_fifo_errors;
187 unsigned long tx_heartbeat_errors;
188 unsigned long tx_window_errors;
189 unsigned long rx_compressed;
190 unsigned long tx_compressed;
193 #endif /* __KERNEL__ */
196 /* Media selection options. */
209 #include <linux/cache.h>
210 #include <linux/skbuff.h>
216 struct netdev_hw_addr {
217 struct list_head list;
218 unsigned char addr[MAX_ADDR_LEN];
220 #define NETDEV_HW_ADDR_T_LAN 1
221 #define NETDEV_HW_ADDR_T_SAN 2
222 #define NETDEV_HW_ADDR_T_SLAVE 3
223 #define NETDEV_HW_ADDR_T_UNICAST 4
224 #define NETDEV_HW_ADDR_T_MULTICAST 5
228 struct rcu_head rcu_head;
231 struct netdev_hw_addr_list {
232 struct list_head list;
236 #define netdev_hw_addr_list_count(l) ((l)->count)
237 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
238 #define netdev_hw_addr_list_for_each(ha, l) \
239 list_for_each_entry(ha, &(l)->list, list)
241 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
242 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
243 #define netdev_for_each_uc_addr(ha, dev) \
244 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
246 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
247 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
248 #define netdev_for_each_mc_addr(ha, dev) \
249 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
252 struct hh_cache *hh_next; /* Next entry */
253 atomic_t hh_refcnt; /* number of users */
255 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
257 * They are mostly read, but hh_refcnt may be changed quite frequently,
258 * incurring cache line ping pongs.
260 __be16 hh_type ____cacheline_aligned_in_smp;
261 /* protocol identifier, f.e ETH_P_IP
262 * NOTE: For VLANs, this will be the
263 * encapuslated type. --BLG
265 u16 hh_len; /* length of header */
266 int (*hh_output)(struct sk_buff *skb);
269 /* cached hardware header; allow for machine alignment needs. */
270 #define HH_DATA_MOD 16
271 #define HH_DATA_OFF(__len) \
272 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
273 #define HH_DATA_ALIGN(__len) \
274 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
275 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
278 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
280 * dev->hard_header_len ? (dev->hard_header_len +
281 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
283 * We could use other alignment values, but we must maintain the
284 * relationship HH alignment <= LL alignment.
286 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
289 #define LL_RESERVED_SPACE(dev) \
290 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
291 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
292 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
293 #define LL_ALLOCATED_SPACE(dev) \
294 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
297 int (*create) (struct sk_buff *skb, struct net_device *dev,
298 unsigned short type, const void *daddr,
299 const void *saddr, unsigned len);
300 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
301 int (*rebuild)(struct sk_buff *skb);
302 #define HAVE_HEADER_CACHE
303 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
304 void (*cache_update)(struct hh_cache *hh,
305 const struct net_device *dev,
306 const unsigned char *haddr);
309 /* These flag bits are private to the generic network queueing
310 * layer, they may not be explicitly referenced by any other
314 enum netdev_state_t {
316 __LINK_STATE_PRESENT,
317 __LINK_STATE_NOCARRIER,
318 __LINK_STATE_LINKWATCH_PENDING,
319 __LINK_STATE_DORMANT,
324 * This structure holds at boot time configured netdevice settings. They
325 * are then used in the device probing.
327 struct netdev_boot_setup {
331 #define NETDEV_BOOT_SETUP_MAX 8
333 extern int __init netdev_boot_setup(char *str);
336 * Structure for NAPI scheduling similar to tasklet but with weighting
339 /* The poll_list must only be managed by the entity which
340 * changes the state of the NAPI_STATE_SCHED bit. This means
341 * whoever atomically sets that bit can add this napi_struct
342 * to the per-cpu poll_list, and whoever clears that bit
343 * can remove from the list right before clearing the bit.
345 struct list_head poll_list;
349 int (*poll)(struct napi_struct *, int);
350 #ifdef CONFIG_NETPOLL
351 spinlock_t poll_lock;
355 unsigned int gro_count;
357 struct net_device *dev;
358 struct list_head dev_list;
359 struct sk_buff *gro_list;
364 NAPI_STATE_SCHED, /* Poll is scheduled */
365 NAPI_STATE_DISABLE, /* Disable pending */
366 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
376 typedef enum gro_result gro_result_t;
378 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
380 extern void __napi_schedule(struct napi_struct *n);
382 static inline int napi_disable_pending(struct napi_struct *n)
384 return test_bit(NAPI_STATE_DISABLE, &n->state);
388 * napi_schedule_prep - check if napi can be scheduled
391 * Test if NAPI routine is already running, and if not mark
392 * it as running. This is used as a condition variable
393 * insure only one NAPI poll instance runs. We also make
394 * sure there is no pending NAPI disable.
396 static inline int napi_schedule_prep(struct napi_struct *n)
398 return !napi_disable_pending(n) &&
399 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
403 * napi_schedule - schedule NAPI poll
406 * Schedule NAPI poll routine to be called if it is not already
409 static inline void napi_schedule(struct napi_struct *n)
411 if (napi_schedule_prep(n))
415 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
416 static inline int napi_reschedule(struct napi_struct *napi)
418 if (napi_schedule_prep(napi)) {
419 __napi_schedule(napi);
426 * napi_complete - NAPI processing complete
429 * Mark NAPI processing as complete.
431 extern void __napi_complete(struct napi_struct *n);
432 extern void napi_complete(struct napi_struct *n);
435 * napi_disable - prevent NAPI from scheduling
438 * Stop NAPI from being scheduled on this context.
439 * Waits till any outstanding processing completes.
441 static inline void napi_disable(struct napi_struct *n)
443 set_bit(NAPI_STATE_DISABLE, &n->state);
444 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
446 clear_bit(NAPI_STATE_DISABLE, &n->state);
450 * napi_enable - enable NAPI scheduling
453 * Resume NAPI from being scheduled on this context.
454 * Must be paired with napi_disable.
456 static inline void napi_enable(struct napi_struct *n)
458 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
459 smp_mb__before_clear_bit();
460 clear_bit(NAPI_STATE_SCHED, &n->state);
465 * napi_synchronize - wait until NAPI is not running
468 * Wait until NAPI is done being scheduled on this context.
469 * Waits till any outstanding processing completes but
470 * does not disable future activations.
472 static inline void napi_synchronize(const struct napi_struct *n)
474 while (test_bit(NAPI_STATE_SCHED, &n->state))
478 # define napi_synchronize(n) barrier()
481 enum netdev_queue_state_t {
483 __QUEUE_STATE_FROZEN,
486 struct netdev_queue {
490 struct net_device *dev;
493 struct Qdisc *qdisc_sleeping;
497 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
500 * please use this field instead of dev->trans_start
502 unsigned long trans_start;
503 unsigned long tx_bytes;
504 unsigned long tx_packets;
505 unsigned long tx_dropped;
506 } ____cacheline_aligned_in_smp;
510 * This structure holds an RPS map which can be of variable length. The
511 * map is an array of CPUs.
518 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
521 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
522 * tail pointer for that CPU's input queue at the time of last enqueue.
524 struct rps_dev_flow {
527 unsigned int last_qtail;
531 * The rps_dev_flow_table structure contains a table of flow mappings.
533 struct rps_dev_flow_table {
536 struct work_struct free_work;
537 struct rps_dev_flow flows[0];
539 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
540 (_num * sizeof(struct rps_dev_flow)))
543 * The rps_sock_flow_table contains mappings of flows to the last CPU
544 * on which they were processed by the application (set in recvmsg).
546 struct rps_sock_flow_table {
550 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
551 (_num * sizeof(u16)))
553 #define RPS_NO_CPU 0xffff
555 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
559 unsigned int cpu, index = hash & table->mask;
561 /* We only give a hint, preemption can change cpu under us */
562 cpu = raw_smp_processor_id();
564 if (table->ents[index] != cpu)
565 table->ents[index] = cpu;
569 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
573 table->ents[hash & table->mask] = RPS_NO_CPU;
576 extern struct rps_sock_flow_table *rps_sock_flow_table;
578 /* This structure contains an instance of an RX queue. */
579 struct netdev_rx_queue {
580 struct rps_map *rps_map;
581 struct rps_dev_flow_table *rps_flow_table;
583 struct netdev_rx_queue *first;
585 } ____cacheline_aligned_in_smp;
586 #endif /* CONFIG_RPS */
589 * This structure defines the management hooks for network devices.
590 * The following hooks can be defined; unless noted otherwise, they are
591 * optional and can be filled with a null pointer.
593 * int (*ndo_init)(struct net_device *dev);
594 * This function is called once when network device is registered.
595 * The network device can use this to any late stage initializaton
596 * or semantic validattion. It can fail with an error code which will
597 * be propogated back to register_netdev
599 * void (*ndo_uninit)(struct net_device *dev);
600 * This function is called when device is unregistered or when registration
601 * fails. It is not called if init fails.
603 * int (*ndo_open)(struct net_device *dev);
604 * This function is called when network device transistions to the up
607 * int (*ndo_stop)(struct net_device *dev);
608 * This function is called when network device transistions to the down
611 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
612 * struct net_device *dev);
613 * Called when a packet needs to be transmitted.
614 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
615 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
616 * Required can not be NULL.
618 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
619 * Called to decide which queue to when device supports multiple
622 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
623 * This function is called to allow device receiver to make
624 * changes to configuration when multicast or promiscious is enabled.
626 * void (*ndo_set_rx_mode)(struct net_device *dev);
627 * This function is called device changes address list filtering.
629 * void (*ndo_set_multicast_list)(struct net_device *dev);
630 * This function is called when the multicast address list changes.
632 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
633 * This function is called when the Media Access Control address
634 * needs to be changed. If this interface is not defined, the
635 * mac address can not be changed.
637 * int (*ndo_validate_addr)(struct net_device *dev);
638 * Test if Media Access Control address is valid for the device.
640 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
641 * Called when a user request an ioctl which can't be handled by
642 * the generic interface code. If not defined ioctl's return
643 * not supported error code.
645 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
646 * Used to set network devices bus interface parameters. This interface
647 * is retained for legacy reason, new devices should use the bus
648 * interface (PCI) for low level management.
650 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
651 * Called when a user wants to change the Maximum Transfer Unit
652 * of a device. If not defined, any request to change MTU will
653 * will return an error.
655 * void (*ndo_tx_timeout)(struct net_device *dev);
656 * Callback uses when the transmitter has not made any progress
657 * for dev->watchdog ticks.
659 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
660 * struct rtnl_link_stats64 *storage);
661 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
662 * Called when a user wants to get the network device usage
663 * statistics. Drivers must do one of the following:
664 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
665 * rtnl_link_stats64 structure passed by the caller.
666 * 2. Define @ndo_get_stats to update a net_device_stats structure
667 * (which should normally be dev->stats) and return a pointer to
668 * it. The structure may be changed asynchronously only if each
669 * field is written atomically.
670 * 3. Update dev->stats asynchronously and atomically, and define
673 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
674 * If device support VLAN receive accleration
675 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
676 * when vlan groups for the device changes. Note: grp is NULL
677 * if no vlan's groups are being used.
679 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
680 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
681 * this function is called when a VLAN id is registered.
683 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
684 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
685 * this function is called when a VLAN id is unregistered.
687 * void (*ndo_poll_controller)(struct net_device *dev);
689 * SR-IOV management functions.
690 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
691 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
692 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
693 * int (*ndo_get_vf_config)(struct net_device *dev,
694 * int vf, struct ifla_vf_info *ivf);
695 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
696 * struct nlattr *port[]);
697 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
699 #define HAVE_NET_DEVICE_OPS
700 struct net_device_ops {
701 int (*ndo_init)(struct net_device *dev);
702 void (*ndo_uninit)(struct net_device *dev);
703 int (*ndo_open)(struct net_device *dev);
704 int (*ndo_stop)(struct net_device *dev);
705 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
706 struct net_device *dev);
707 u16 (*ndo_select_queue)(struct net_device *dev,
708 struct sk_buff *skb);
709 void (*ndo_change_rx_flags)(struct net_device *dev,
711 void (*ndo_set_rx_mode)(struct net_device *dev);
712 void (*ndo_set_multicast_list)(struct net_device *dev);
713 int (*ndo_set_mac_address)(struct net_device *dev,
715 int (*ndo_validate_addr)(struct net_device *dev);
716 int (*ndo_do_ioctl)(struct net_device *dev,
717 struct ifreq *ifr, int cmd);
718 int (*ndo_set_config)(struct net_device *dev,
720 int (*ndo_change_mtu)(struct net_device *dev,
722 int (*ndo_neigh_setup)(struct net_device *dev,
723 struct neigh_parms *);
724 void (*ndo_tx_timeout) (struct net_device *dev);
726 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
727 struct rtnl_link_stats64 *storage);
728 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
730 void (*ndo_vlan_rx_register)(struct net_device *dev,
731 struct vlan_group *grp);
732 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
734 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
736 #ifdef CONFIG_NET_POLL_CONTROLLER
737 void (*ndo_poll_controller)(struct net_device *dev);
738 int (*ndo_netpoll_setup)(struct net_device *dev,
739 struct netpoll_info *info);
740 void (*ndo_netpoll_cleanup)(struct net_device *dev);
742 int (*ndo_set_vf_mac)(struct net_device *dev,
744 int (*ndo_set_vf_vlan)(struct net_device *dev,
745 int queue, u16 vlan, u8 qos);
746 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
748 int (*ndo_get_vf_config)(struct net_device *dev,
750 struct ifla_vf_info *ivf);
751 int (*ndo_set_vf_port)(struct net_device *dev,
753 struct nlattr *port[]);
754 int (*ndo_get_vf_port)(struct net_device *dev,
755 int vf, struct sk_buff *skb);
756 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
757 int (*ndo_fcoe_enable)(struct net_device *dev);
758 int (*ndo_fcoe_disable)(struct net_device *dev);
759 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
761 struct scatterlist *sgl,
763 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
765 #define NETDEV_FCOE_WWNN 0
766 #define NETDEV_FCOE_WWPN 1
767 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
773 * The DEVICE structure.
774 * Actually, this whole structure is a big mistake. It mixes I/O
775 * data with strictly "high-level" data, and it has to know about
776 * almost every data structure used in the INET module.
778 * FIXME: cleanup struct net_device such that network protocol info
785 * This is the first field of the "visible" part of this structure
786 * (i.e. as seen by users in the "Space.c" file). It is the name
791 struct pm_qos_request_list *pm_qos_req;
793 /* device name hash chain */
794 struct hlist_node name_hlist;
799 * I/O specific fields
800 * FIXME: Merge these and struct ifmap into one
802 unsigned long mem_end; /* shared mem end */
803 unsigned long mem_start; /* shared mem start */
804 unsigned long base_addr; /* device I/O address */
805 unsigned int irq; /* device IRQ number */
808 * Some hardware also needs these fields, but they are not
809 * part of the usual set specified in Space.c.
812 unsigned char if_port; /* Selectable AUI, TP,..*/
813 unsigned char dma; /* DMA channel */
817 struct list_head dev_list;
818 struct list_head napi_list;
819 struct list_head unreg_list;
821 /* Net device features */
822 unsigned long features;
823 #define NETIF_F_SG 1 /* Scatter/gather IO. */
824 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
825 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
826 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
827 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
828 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
829 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
830 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
831 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
832 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
833 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
834 #define NETIF_F_GSO 2048 /* Enable software GSO. */
835 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
836 /* do not use LLTX in new drivers */
837 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
838 #define NETIF_F_GRO 16384 /* Generic receive offload */
839 #define NETIF_F_LRO 32768 /* large receive offload */
841 /* the GSO_MASK reserves bits 16 through 23 */
842 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
843 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
844 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
845 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
846 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
848 /* Segmentation offload features */
849 #define NETIF_F_GSO_SHIFT 16
850 #define NETIF_F_GSO_MASK 0x00ff0000
851 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
852 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
853 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
854 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
855 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
856 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
858 /* List of features with software fallbacks. */
859 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
860 NETIF_F_TSO6 | NETIF_F_UFO)
863 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
864 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
865 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
866 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
869 * If one device supports one of these features, then enable them
870 * for all in netdev_increment_features.
872 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
873 NETIF_F_SG | NETIF_F_HIGHDMA | \
876 /* Interface index. Unique device identifier */
880 struct net_device_stats stats;
882 #ifdef CONFIG_WIRELESS_EXT
883 /* List of functions to handle Wireless Extensions (instead of ioctl).
884 * See <net/iw_handler.h> for details. Jean II */
885 const struct iw_handler_def * wireless_handlers;
886 /* Instance data managed by the core of Wireless Extensions. */
887 struct iw_public_data * wireless_data;
889 /* Management operations */
890 const struct net_device_ops *netdev_ops;
891 const struct ethtool_ops *ethtool_ops;
893 /* Hardware header description */
894 const struct header_ops *header_ops;
896 unsigned int flags; /* interface flags (a la BSD) */
897 unsigned short gflags;
898 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
899 unsigned short padded; /* How much padding added by alloc_netdev() */
901 unsigned char operstate; /* RFC2863 operstate */
902 unsigned char link_mode; /* mapping policy to operstate */
904 unsigned int mtu; /* interface MTU value */
905 unsigned short type; /* interface hardware type */
906 unsigned short hard_header_len; /* hardware hdr length */
908 /* extra head- and tailroom the hardware may need, but not in all cases
909 * can this be guaranteed, especially tailroom. Some cases also use
910 * LL_MAX_HEADER instead to allocate the skb.
912 unsigned short needed_headroom;
913 unsigned short needed_tailroom;
915 struct net_device *master; /* Pointer to master device of a group,
916 * which this device is member of.
919 /* Interface address info. */
920 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
921 unsigned char addr_len; /* hardware address length */
922 unsigned short dev_id; /* for shared network cards */
924 spinlock_t addr_list_lock;
925 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
926 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
928 unsigned int promiscuity;
929 unsigned int allmulti;
932 /* Protocol specific pointers */
934 #ifdef CONFIG_NET_DSA
935 void *dsa_ptr; /* dsa specific data */
937 void *atalk_ptr; /* AppleTalk link */
938 void *ip_ptr; /* IPv4 specific data */
939 void *dn_ptr; /* DECnet specific data */
940 void *ip6_ptr; /* IPv6 specific data */
941 void *ec_ptr; /* Econet specific data */
942 void *ax25_ptr; /* AX.25 specific data */
943 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
944 assign before registering */
947 * Cache line mostly used on receive path (including eth_type_trans())
949 unsigned long last_rx; /* Time of last Rx */
950 /* Interface address info used in eth_type_trans() */
951 unsigned char *dev_addr; /* hw address, (before bcast
952 because most packets are
955 struct netdev_hw_addr_list dev_addrs; /* list of device
958 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
961 struct kset *queues_kset;
963 struct netdev_rx_queue *_rx;
965 /* Number of RX queues allocated at alloc_netdev_mq() time */
966 unsigned int num_rx_queues;
969 struct netdev_queue rx_queue;
970 rx_handler_func_t *rx_handler;
971 void *rx_handler_data;
973 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
975 /* Number of TX queues allocated at alloc_netdev_mq() time */
976 unsigned int num_tx_queues;
978 /* Number of TX queues currently active in device */
979 unsigned int real_num_tx_queues;
981 /* root qdisc from userspace point of view */
984 unsigned long tx_queue_len; /* Max frames per queue allowed */
985 spinlock_t tx_global_lock;
987 * One part is mostly used on xmit path (device)
989 /* These may be needed for future network-power-down code. */
992 * trans_start here is expensive for high speed devices on SMP,
993 * please use netdev_queue->trans_start instead.
995 unsigned long trans_start; /* Time (in jiffies) of last Tx */
997 int watchdog_timeo; /* used by dev_watchdog() */
998 struct timer_list watchdog_timer;
1000 /* Number of references to this device */
1001 atomic_t refcnt ____cacheline_aligned_in_smp;
1003 /* delayed register/unregister */
1004 struct list_head todo_list;
1005 /* device index hash chain */
1006 struct hlist_node index_hlist;
1008 struct list_head link_watch_list;
1010 /* register/unregister state machine */
1011 enum { NETREG_UNINITIALIZED=0,
1012 NETREG_REGISTERED, /* completed register_netdevice */
1013 NETREG_UNREGISTERING, /* called unregister_netdevice */
1014 NETREG_UNREGISTERED, /* completed unregister todo */
1015 NETREG_RELEASED, /* called free_netdev */
1016 NETREG_DUMMY, /* dummy device for NAPI poll */
1020 RTNL_LINK_INITIALIZED,
1021 RTNL_LINK_INITIALIZING,
1022 } rtnl_link_state:16;
1024 /* Called from unregister, can be used to call free_netdev */
1025 void (*destructor)(struct net_device *dev);
1027 #ifdef CONFIG_NETPOLL
1028 struct netpoll_info *npinfo;
1031 #ifdef CONFIG_NET_NS
1032 /* Network namespace this network device is inside */
1036 /* mid-layer private */
1040 struct garp_port *garp_port;
1042 /* class/net/name entry */
1044 /* space for optional device, statistics, and wireless sysfs groups */
1045 const struct attribute_group *sysfs_groups[4];
1047 /* rtnetlink link ops */
1048 const struct rtnl_link_ops *rtnl_link_ops;
1050 /* VLAN feature mask */
1051 unsigned long vlan_features;
1053 /* for setting kernel sock attribute on TCP connection setup */
1054 #define GSO_MAX_SIZE 65536
1055 unsigned int gso_max_size;
1058 /* Data Center Bridging netlink ops */
1059 const struct dcbnl_rtnl_ops *dcbnl_ops;
1062 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1063 /* max exchange id for FCoE LRO by ddp */
1064 unsigned int fcoe_ddp_xid;
1066 /* n-tuple filter list attached to this device */
1067 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1069 #define to_net_dev(d) container_of(d, struct net_device, dev)
1071 #define NETDEV_ALIGN 32
1074 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1077 return &dev->_tx[index];
1080 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1081 void (*f)(struct net_device *,
1082 struct netdev_queue *,
1088 for (i = 0; i < dev->num_tx_queues; i++)
1089 f(dev, &dev->_tx[i], arg);
1093 * Net namespace inlines
1096 struct net *dev_net(const struct net_device *dev)
1098 return read_pnet(&dev->nd_net);
1102 void dev_net_set(struct net_device *dev, struct net *net)
1104 #ifdef CONFIG_NET_NS
1105 release_net(dev->nd_net);
1106 dev->nd_net = hold_net(net);
1110 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1112 #ifdef CONFIG_NET_DSA_TAG_DSA
1113 if (dev->dsa_ptr != NULL)
1114 return dsa_uses_dsa_tags(dev->dsa_ptr);
1120 #ifndef CONFIG_NET_NS
1121 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1125 #else /* CONFIG_NET_NS */
1126 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1129 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1131 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1132 if (dev->dsa_ptr != NULL)
1133 return dsa_uses_trailer_tags(dev->dsa_ptr);
1140 * netdev_priv - access network device private data
1141 * @dev: network device
1143 * Get network device private data
1145 static inline void *netdev_priv(const struct net_device *dev)
1147 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1150 /* Set the sysfs physical device reference for the network logical device
1151 * if set prior to registration will cause a symlink during initialization.
1153 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1155 /* Set the sysfs device type for the network logical device to allow
1156 * fin grained indentification of different network device types. For
1157 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1159 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1162 * netif_napi_add - initialize a napi context
1163 * @dev: network device
1164 * @napi: napi context
1165 * @poll: polling function
1166 * @weight: default weight
1168 * netif_napi_add() must be used to initialize a napi context prior to calling
1169 * *any* of the other napi related functions.
1171 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1172 int (*poll)(struct napi_struct *, int), int weight);
1175 * netif_napi_del - remove a napi context
1176 * @napi: napi context
1178 * netif_napi_del() removes a napi context from the network device napi list
1180 void netif_napi_del(struct napi_struct *napi);
1182 struct napi_gro_cb {
1183 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1186 /* Length of frag0. */
1187 unsigned int frag0_len;
1189 /* This indicates where we are processing relative to skb->data. */
1192 /* This is non-zero if the packet may be of the same flow. */
1195 /* This is non-zero if the packet cannot be merged with the new skb. */
1198 /* Number of segments aggregated. */
1205 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1207 struct packet_type {
1208 __be16 type; /* This is really htons(ether_type). */
1209 struct net_device *dev; /* NULL is wildcarded here */
1210 int (*func) (struct sk_buff *,
1211 struct net_device *,
1212 struct packet_type *,
1213 struct net_device *);
1214 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1216 int (*gso_send_check)(struct sk_buff *skb);
1217 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1218 struct sk_buff *skb);
1219 int (*gro_complete)(struct sk_buff *skb);
1220 void *af_packet_priv;
1221 struct list_head list;
1224 #include <linux/interrupt.h>
1225 #include <linux/notifier.h>
1227 extern rwlock_t dev_base_lock; /* Device list lock */
1230 #define for_each_netdev(net, d) \
1231 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1232 #define for_each_netdev_reverse(net, d) \
1233 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1234 #define for_each_netdev_rcu(net, d) \
1235 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1236 #define for_each_netdev_safe(net, d, n) \
1237 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1238 #define for_each_netdev_continue(net, d) \
1239 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1240 #define for_each_netdev_continue_rcu(net, d) \
1241 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1242 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1244 static inline struct net_device *next_net_device(struct net_device *dev)
1246 struct list_head *lh;
1250 lh = dev->dev_list.next;
1251 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1254 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1256 struct list_head *lh;
1260 lh = rcu_dereference(dev->dev_list.next);
1261 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1264 static inline struct net_device *first_net_device(struct net *net)
1266 return list_empty(&net->dev_base_head) ? NULL :
1267 net_device_entry(net->dev_base_head.next);
1270 extern int netdev_boot_setup_check(struct net_device *dev);
1271 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1272 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1273 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1274 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1275 extern void dev_add_pack(struct packet_type *pt);
1276 extern void dev_remove_pack(struct packet_type *pt);
1277 extern void __dev_remove_pack(struct packet_type *pt);
1279 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1280 unsigned short mask);
1281 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1282 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1283 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1284 extern int dev_alloc_name(struct net_device *dev, const char *name);
1285 extern int dev_open(struct net_device *dev);
1286 extern int dev_close(struct net_device *dev);
1287 extern void dev_disable_lro(struct net_device *dev);
1288 extern int dev_queue_xmit(struct sk_buff *skb);
1289 extern int register_netdevice(struct net_device *dev);
1290 extern void unregister_netdevice_queue(struct net_device *dev,
1291 struct list_head *head);
1292 extern void unregister_netdevice_many(struct list_head *head);
1293 static inline void unregister_netdevice(struct net_device *dev)
1295 unregister_netdevice_queue(dev, NULL);
1298 extern void free_netdev(struct net_device *dev);
1299 extern void synchronize_net(void);
1300 extern int register_netdevice_notifier(struct notifier_block *nb);
1301 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1302 extern int init_dummy_netdev(struct net_device *dev);
1303 extern void netdev_resync_ops(struct net_device *dev);
1305 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1306 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1307 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1308 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1309 extern int dev_restart(struct net_device *dev);
1310 #ifdef CONFIG_NETPOLL_TRAP
1311 extern int netpoll_trap(void);
1313 extern int skb_gro_receive(struct sk_buff **head,
1314 struct sk_buff *skb);
1315 extern void skb_gro_reset_offset(struct sk_buff *skb);
1317 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1319 return NAPI_GRO_CB(skb)->data_offset;
1322 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1324 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1327 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1329 NAPI_GRO_CB(skb)->data_offset += len;
1332 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1333 unsigned int offset)
1335 return NAPI_GRO_CB(skb)->frag0 + offset;
1338 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1340 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1343 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1344 unsigned int offset)
1346 NAPI_GRO_CB(skb)->frag0 = NULL;
1347 NAPI_GRO_CB(skb)->frag0_len = 0;
1348 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1351 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1353 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1356 static inline void *skb_gro_network_header(struct sk_buff *skb)
1358 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1359 skb_network_offset(skb);
1362 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1363 unsigned short type,
1364 const void *daddr, const void *saddr,
1367 if (!dev->header_ops || !dev->header_ops->create)
1370 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1373 static inline int dev_parse_header(const struct sk_buff *skb,
1374 unsigned char *haddr)
1376 const struct net_device *dev = skb->dev;
1378 if (!dev->header_ops || !dev->header_ops->parse)
1380 return dev->header_ops->parse(skb, haddr);
1383 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1384 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1385 static inline int unregister_gifconf(unsigned int family)
1387 return register_gifconf(family, NULL);
1391 * Incoming packets are placed on per-cpu queues
1393 struct softnet_data {
1394 struct Qdisc *output_queue;
1395 struct Qdisc **output_queue_tailp;
1396 struct list_head poll_list;
1397 struct sk_buff *completion_queue;
1398 struct sk_buff_head process_queue;
1401 unsigned int processed;
1402 unsigned int time_squeeze;
1403 unsigned int cpu_collision;
1404 unsigned int received_rps;
1407 struct softnet_data *rps_ipi_list;
1409 /* Elements below can be accessed between CPUs for RPS */
1410 struct call_single_data csd ____cacheline_aligned_in_smp;
1411 struct softnet_data *rps_ipi_next;
1413 unsigned int input_queue_head;
1414 unsigned int input_queue_tail;
1417 struct sk_buff_head input_pkt_queue;
1418 struct napi_struct backlog;
1421 static inline void input_queue_head_incr(struct softnet_data *sd)
1424 sd->input_queue_head++;
1428 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1429 unsigned int *qtail)
1432 *qtail = ++sd->input_queue_tail;
1436 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1438 #define HAVE_NETIF_QUEUE
1440 extern void __netif_schedule(struct Qdisc *q);
1442 static inline void netif_schedule_queue(struct netdev_queue *txq)
1444 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1445 __netif_schedule(txq->qdisc);
1448 static inline void netif_tx_schedule_all(struct net_device *dev)
1452 for (i = 0; i < dev->num_tx_queues; i++)
1453 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1456 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1458 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1462 * netif_start_queue - allow transmit
1463 * @dev: network device
1465 * Allow upper layers to call the device hard_start_xmit routine.
1467 static inline void netif_start_queue(struct net_device *dev)
1469 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1472 static inline void netif_tx_start_all_queues(struct net_device *dev)
1476 for (i = 0; i < dev->num_tx_queues; i++) {
1477 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1478 netif_tx_start_queue(txq);
1482 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1484 #ifdef CONFIG_NETPOLL_TRAP
1485 if (netpoll_trap()) {
1486 netif_tx_start_queue(dev_queue);
1490 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1491 __netif_schedule(dev_queue->qdisc);
1495 * netif_wake_queue - restart transmit
1496 * @dev: network device
1498 * Allow upper layers to call the device hard_start_xmit routine.
1499 * Used for flow control when transmit resources are available.
1501 static inline void netif_wake_queue(struct net_device *dev)
1503 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1506 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1510 for (i = 0; i < dev->num_tx_queues; i++) {
1511 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1512 netif_tx_wake_queue(txq);
1516 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1518 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1522 * netif_stop_queue - stop transmitted packets
1523 * @dev: network device
1525 * Stop upper layers calling the device hard_start_xmit routine.
1526 * Used for flow control when transmit resources are unavailable.
1528 static inline void netif_stop_queue(struct net_device *dev)
1530 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1533 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1537 for (i = 0; i < dev->num_tx_queues; i++) {
1538 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1539 netif_tx_stop_queue(txq);
1543 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1545 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1549 * netif_queue_stopped - test if transmit queue is flowblocked
1550 * @dev: network device
1552 * Test if transmit queue on device is currently unable to send.
1554 static inline int netif_queue_stopped(const struct net_device *dev)
1556 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1559 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1561 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1565 * netif_running - test if up
1566 * @dev: network device
1568 * Test if the device has been brought up.
1570 static inline int netif_running(const struct net_device *dev)
1572 return test_bit(__LINK_STATE_START, &dev->state);
1576 * Routines to manage the subqueues on a device. We only need start
1577 * stop, and a check if it's stopped. All other device management is
1578 * done at the overall netdevice level.
1579 * Also test the device if we're multiqueue.
1583 * netif_start_subqueue - allow sending packets on subqueue
1584 * @dev: network device
1585 * @queue_index: sub queue index
1587 * Start individual transmit queue of a device with multiple transmit queues.
1589 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1591 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1593 netif_tx_start_queue(txq);
1597 * netif_stop_subqueue - stop sending packets on subqueue
1598 * @dev: network device
1599 * @queue_index: sub queue index
1601 * Stop individual transmit queue of a device with multiple transmit queues.
1603 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1605 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1606 #ifdef CONFIG_NETPOLL_TRAP
1610 netif_tx_stop_queue(txq);
1614 * netif_subqueue_stopped - test status of subqueue
1615 * @dev: network device
1616 * @queue_index: sub queue index
1618 * Check individual transmit queue of a device with multiple transmit queues.
1620 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1623 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1625 return netif_tx_queue_stopped(txq);
1628 static inline int netif_subqueue_stopped(const struct net_device *dev,
1629 struct sk_buff *skb)
1631 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1635 * netif_wake_subqueue - allow sending packets on subqueue
1636 * @dev: network device
1637 * @queue_index: sub queue index
1639 * Resume individual transmit queue of a device with multiple transmit queues.
1641 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1643 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1644 #ifdef CONFIG_NETPOLL_TRAP
1648 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1649 __netif_schedule(txq->qdisc);
1653 * netif_is_multiqueue - test if device has multiple transmit queues
1654 * @dev: network device
1656 * Check if device has multiple transmit queues
1658 static inline int netif_is_multiqueue(const struct net_device *dev)
1660 return (dev->num_tx_queues > 1);
1663 extern void netif_set_real_num_tx_queues(struct net_device *dev,
1666 /* Use this variant when it is known for sure that it
1667 * is executing from hardware interrupt context or with hardware interrupts
1670 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1672 /* Use this variant in places where it could be invoked
1673 * from either hardware interrupt or other context, with hardware interrupts
1674 * either disabled or enabled.
1676 extern void dev_kfree_skb_any(struct sk_buff *skb);
1678 #define HAVE_NETIF_RX 1
1679 extern int netif_rx(struct sk_buff *skb);
1680 extern int netif_rx_ni(struct sk_buff *skb);
1681 #define HAVE_NETIF_RECEIVE_SKB 1
1682 extern int netif_receive_skb(struct sk_buff *skb);
1683 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1684 struct sk_buff *skb);
1685 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1686 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1687 struct sk_buff *skb);
1688 extern void napi_reuse_skb(struct napi_struct *napi,
1689 struct sk_buff *skb);
1690 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1691 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1692 struct sk_buff *skb,
1694 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1695 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1697 static inline void napi_free_frags(struct napi_struct *napi)
1699 kfree_skb(napi->skb);
1703 extern int netdev_rx_handler_register(struct net_device *dev,
1704 rx_handler_func_t *rx_handler,
1705 void *rx_handler_data);
1706 extern void netdev_rx_handler_unregister(struct net_device *dev);
1708 extern void netif_nit_deliver(struct sk_buff *skb);
1709 extern int dev_valid_name(const char *name);
1710 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1711 extern int dev_ethtool(struct net *net, struct ifreq *);
1712 extern unsigned dev_get_flags(const struct net_device *);
1713 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1714 extern int dev_change_flags(struct net_device *, unsigned);
1715 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1716 extern int dev_change_name(struct net_device *, const char *);
1717 extern int dev_set_alias(struct net_device *, const char *, size_t);
1718 extern int dev_change_net_namespace(struct net_device *,
1719 struct net *, const char *);
1720 extern int dev_set_mtu(struct net_device *, int);
1721 extern int dev_set_mac_address(struct net_device *,
1723 extern int dev_hard_start_xmit(struct sk_buff *skb,
1724 struct net_device *dev,
1725 struct netdev_queue *txq);
1726 extern int dev_forward_skb(struct net_device *dev,
1727 struct sk_buff *skb);
1729 extern int netdev_budget;
1731 /* Called by rtnetlink.c:rtnl_unlock() */
1732 extern void netdev_run_todo(void);
1735 * dev_put - release reference to device
1736 * @dev: network device
1738 * Release reference to device to allow it to be freed.
1740 static inline void dev_put(struct net_device *dev)
1742 atomic_dec(&dev->refcnt);
1746 * dev_hold - get reference to device
1747 * @dev: network device
1749 * Hold reference to device to keep it from being freed.
1751 static inline void dev_hold(struct net_device *dev)
1753 atomic_inc(&dev->refcnt);
1756 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1757 * and _off may be called from IRQ context, but it is caller
1758 * who is responsible for serialization of these calls.
1760 * The name carrier is inappropriate, these functions should really be
1761 * called netif_lowerlayer_*() because they represent the state of any
1762 * kind of lower layer not just hardware media.
1765 extern void linkwatch_fire_event(struct net_device *dev);
1766 extern void linkwatch_forget_dev(struct net_device *dev);
1769 * netif_carrier_ok - test if carrier present
1770 * @dev: network device
1772 * Check if carrier is present on device
1774 static inline int netif_carrier_ok(const struct net_device *dev)
1776 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1779 extern unsigned long dev_trans_start(struct net_device *dev);
1781 extern void __netdev_watchdog_up(struct net_device *dev);
1783 extern void netif_carrier_on(struct net_device *dev);
1785 extern void netif_carrier_off(struct net_device *dev);
1787 extern void netif_notify_peers(struct net_device *dev);
1790 * netif_dormant_on - mark device as dormant.
1791 * @dev: network device
1793 * Mark device as dormant (as per RFC2863).
1795 * The dormant state indicates that the relevant interface is not
1796 * actually in a condition to pass packets (i.e., it is not 'up') but is
1797 * in a "pending" state, waiting for some external event. For "on-
1798 * demand" interfaces, this new state identifies the situation where the
1799 * interface is waiting for events to place it in the up state.
1802 static inline void netif_dormant_on(struct net_device *dev)
1804 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1805 linkwatch_fire_event(dev);
1809 * netif_dormant_off - set device as not dormant.
1810 * @dev: network device
1812 * Device is not in dormant state.
1814 static inline void netif_dormant_off(struct net_device *dev)
1816 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1817 linkwatch_fire_event(dev);
1821 * netif_dormant - test if carrier present
1822 * @dev: network device
1824 * Check if carrier is present on device
1826 static inline int netif_dormant(const struct net_device *dev)
1828 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1833 * netif_oper_up - test if device is operational
1834 * @dev: network device
1836 * Check if carrier is operational
1838 static inline int netif_oper_up(const struct net_device *dev)
1840 return (dev->operstate == IF_OPER_UP ||
1841 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1845 * netif_device_present - is device available or removed
1846 * @dev: network device
1848 * Check if device has not been removed from system.
1850 static inline int netif_device_present(struct net_device *dev)
1852 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1855 extern void netif_device_detach(struct net_device *dev);
1857 extern void netif_device_attach(struct net_device *dev);
1860 * Network interface message level settings
1862 #define HAVE_NETIF_MSG 1
1865 NETIF_MSG_DRV = 0x0001,
1866 NETIF_MSG_PROBE = 0x0002,
1867 NETIF_MSG_LINK = 0x0004,
1868 NETIF_MSG_TIMER = 0x0008,
1869 NETIF_MSG_IFDOWN = 0x0010,
1870 NETIF_MSG_IFUP = 0x0020,
1871 NETIF_MSG_RX_ERR = 0x0040,
1872 NETIF_MSG_TX_ERR = 0x0080,
1873 NETIF_MSG_TX_QUEUED = 0x0100,
1874 NETIF_MSG_INTR = 0x0200,
1875 NETIF_MSG_TX_DONE = 0x0400,
1876 NETIF_MSG_RX_STATUS = 0x0800,
1877 NETIF_MSG_PKTDATA = 0x1000,
1878 NETIF_MSG_HW = 0x2000,
1879 NETIF_MSG_WOL = 0x4000,
1882 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1883 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1884 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1885 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1886 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1887 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1888 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1889 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1890 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1891 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1892 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1893 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1894 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1895 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1896 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1898 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1901 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1902 return default_msg_enable_bits;
1903 if (debug_value == 0) /* no output */
1905 /* set low N bits */
1906 return (1 << debug_value) - 1;
1909 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1911 spin_lock(&txq->_xmit_lock);
1912 txq->xmit_lock_owner = cpu;
1915 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1917 spin_lock_bh(&txq->_xmit_lock);
1918 txq->xmit_lock_owner = smp_processor_id();
1921 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1923 int ok = spin_trylock(&txq->_xmit_lock);
1925 txq->xmit_lock_owner = smp_processor_id();
1929 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1931 txq->xmit_lock_owner = -1;
1932 spin_unlock(&txq->_xmit_lock);
1935 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1937 txq->xmit_lock_owner = -1;
1938 spin_unlock_bh(&txq->_xmit_lock);
1941 static inline void txq_trans_update(struct netdev_queue *txq)
1943 if (txq->xmit_lock_owner != -1)
1944 txq->trans_start = jiffies;
1948 * netif_tx_lock - grab network device transmit lock
1949 * @dev: network device
1951 * Get network device transmit lock
1953 static inline void netif_tx_lock(struct net_device *dev)
1958 spin_lock(&dev->tx_global_lock);
1959 cpu = smp_processor_id();
1960 for (i = 0; i < dev->num_tx_queues; i++) {
1961 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1963 /* We are the only thread of execution doing a
1964 * freeze, but we have to grab the _xmit_lock in
1965 * order to synchronize with threads which are in
1966 * the ->hard_start_xmit() handler and already
1967 * checked the frozen bit.
1969 __netif_tx_lock(txq, cpu);
1970 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1971 __netif_tx_unlock(txq);
1975 static inline void netif_tx_lock_bh(struct net_device *dev)
1981 static inline void netif_tx_unlock(struct net_device *dev)
1985 for (i = 0; i < dev->num_tx_queues; i++) {
1986 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1988 /* No need to grab the _xmit_lock here. If the
1989 * queue is not stopped for another reason, we
1992 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1993 netif_schedule_queue(txq);
1995 spin_unlock(&dev->tx_global_lock);
1998 static inline void netif_tx_unlock_bh(struct net_device *dev)
2000 netif_tx_unlock(dev);
2004 #define HARD_TX_LOCK(dev, txq, cpu) { \
2005 if ((dev->features & NETIF_F_LLTX) == 0) { \
2006 __netif_tx_lock(txq, cpu); \
2010 #define HARD_TX_UNLOCK(dev, txq) { \
2011 if ((dev->features & NETIF_F_LLTX) == 0) { \
2012 __netif_tx_unlock(txq); \
2016 static inline void netif_tx_disable(struct net_device *dev)
2022 cpu = smp_processor_id();
2023 for (i = 0; i < dev->num_tx_queues; i++) {
2024 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2026 __netif_tx_lock(txq, cpu);
2027 netif_tx_stop_queue(txq);
2028 __netif_tx_unlock(txq);
2033 static inline void netif_addr_lock(struct net_device *dev)
2035 spin_lock(&dev->addr_list_lock);
2038 static inline void netif_addr_lock_bh(struct net_device *dev)
2040 spin_lock_bh(&dev->addr_list_lock);
2043 static inline void netif_addr_unlock(struct net_device *dev)
2045 spin_unlock(&dev->addr_list_lock);
2048 static inline void netif_addr_unlock_bh(struct net_device *dev)
2050 spin_unlock_bh(&dev->addr_list_lock);
2054 * dev_addrs walker. Should be used only for read access. Call with
2055 * rcu_read_lock held.
2057 #define for_each_dev_addr(dev, ha) \
2058 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2060 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2062 extern void ether_setup(struct net_device *dev);
2064 /* Support for loadable net-drivers */
2065 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
2066 void (*setup)(struct net_device *),
2067 unsigned int queue_count);
2068 #define alloc_netdev(sizeof_priv, name, setup) \
2069 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2070 extern int register_netdev(struct net_device *dev);
2071 extern void unregister_netdev(struct net_device *dev);
2073 /* General hardware address lists handling functions */
2074 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2075 struct netdev_hw_addr_list *from_list,
2076 int addr_len, unsigned char addr_type);
2077 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2078 struct netdev_hw_addr_list *from_list,
2079 int addr_len, unsigned char addr_type);
2080 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2081 struct netdev_hw_addr_list *from_list,
2083 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2084 struct netdev_hw_addr_list *from_list,
2086 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2087 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2089 /* Functions used for device addresses handling */
2090 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2091 unsigned char addr_type);
2092 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2093 unsigned char addr_type);
2094 extern int dev_addr_add_multiple(struct net_device *to_dev,
2095 struct net_device *from_dev,
2096 unsigned char addr_type);
2097 extern int dev_addr_del_multiple(struct net_device *to_dev,
2098 struct net_device *from_dev,
2099 unsigned char addr_type);
2100 extern void dev_addr_flush(struct net_device *dev);
2101 extern int dev_addr_init(struct net_device *dev);
2103 /* Functions used for unicast addresses handling */
2104 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2105 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2106 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2107 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2108 extern void dev_uc_flush(struct net_device *dev);
2109 extern void dev_uc_init(struct net_device *dev);
2111 /* Functions used for multicast addresses handling */
2112 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2113 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2114 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2115 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2116 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2117 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2118 extern void dev_mc_flush(struct net_device *dev);
2119 extern void dev_mc_init(struct net_device *dev);
2121 /* Functions used for secondary unicast and multicast support */
2122 extern void dev_set_rx_mode(struct net_device *dev);
2123 extern void __dev_set_rx_mode(struct net_device *dev);
2124 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2125 extern int dev_set_allmulti(struct net_device *dev, int inc);
2126 extern void netdev_state_change(struct net_device *dev);
2127 extern int netdev_bonding_change(struct net_device *dev,
2128 unsigned long event);
2129 extern void netdev_features_change(struct net_device *dev);
2130 /* Load a device via the kmod */
2131 extern void dev_load(struct net *net, const char *name);
2132 extern void dev_mcast_init(void);
2133 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2134 struct rtnl_link_stats64 *storage);
2135 extern void dev_txq_stats_fold(const struct net_device *dev,
2136 struct rtnl_link_stats64 *stats);
2138 extern int netdev_max_backlog;
2139 extern int netdev_tstamp_prequeue;
2140 extern int weight_p;
2141 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2142 extern int skb_checksum_help(struct sk_buff *skb);
2143 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2145 extern void netdev_rx_csum_fault(struct net_device *dev);
2147 static inline void netdev_rx_csum_fault(struct net_device *dev)
2151 /* rx skb timestamps */
2152 extern void net_enable_timestamp(void);
2153 extern void net_disable_timestamp(void);
2155 #ifdef CONFIG_PROC_FS
2156 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2157 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2158 extern void dev_seq_stop(struct seq_file *seq, void *v);
2161 extern int netdev_class_create_file(struct class_attribute *class_attr);
2162 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2164 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2166 extern void linkwatch_run_queue(void);
2168 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2169 unsigned long mask);
2170 unsigned long netdev_fix_features(unsigned long features, const char *name);
2172 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2173 struct net_device *dev);
2175 static inline int net_gso_ok(int features, int gso_type)
2177 int feature = gso_type << NETIF_F_GSO_SHIFT;
2178 return (features & feature) == feature;
2181 static inline int skb_gso_ok(struct sk_buff *skb, int features)
2183 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2184 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
2187 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2189 return skb_is_gso(skb) &&
2190 (!skb_gso_ok(skb, dev->features) ||
2191 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2194 static inline void netif_set_gso_max_size(struct net_device *dev,
2197 dev->gso_max_size = size;
2200 extern int __skb_bond_should_drop(struct sk_buff *skb,
2201 struct net_device *master);
2203 static inline int skb_bond_should_drop(struct sk_buff *skb,
2204 struct net_device *master)
2207 return __skb_bond_should_drop(skb, master);
2211 extern struct pernet_operations __net_initdata loopback_net_ops;
2213 static inline int dev_ethtool_get_settings(struct net_device *dev,
2214 struct ethtool_cmd *cmd)
2216 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2218 return dev->ethtool_ops->get_settings(dev, cmd);
2221 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2223 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2225 return dev->ethtool_ops->get_rx_csum(dev);
2228 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2230 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2232 return dev->ethtool_ops->get_flags(dev);
2235 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2237 /* netdev_printk helpers, similar to dev_printk */
2239 static inline const char *netdev_name(const struct net_device *dev)
2241 if (dev->reg_state != NETREG_REGISTERED)
2242 return "(unregistered net_device)";
2246 extern int netdev_printk(const char *level, const struct net_device *dev,
2247 const char *format, ...)
2248 __attribute__ ((format (printf, 3, 4)));
2249 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2250 __attribute__ ((format (printf, 2, 3)));
2251 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2252 __attribute__ ((format (printf, 2, 3)));
2253 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2254 __attribute__ ((format (printf, 2, 3)));
2255 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2256 __attribute__ ((format (printf, 2, 3)));
2257 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2258 __attribute__ ((format (printf, 2, 3)));
2259 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2260 __attribute__ ((format (printf, 2, 3)));
2261 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2262 __attribute__ ((format (printf, 2, 3)));
2265 #define netdev_dbg(__dev, format, args...) \
2266 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2267 #elif defined(CONFIG_DYNAMIC_DEBUG)
2268 #define netdev_dbg(__dev, format, args...) \
2270 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2271 netdev_name(__dev), ##args); \
2274 #define netdev_dbg(__dev, format, args...) \
2277 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2282 #if defined(VERBOSE_DEBUG)
2283 #define netdev_vdbg netdev_dbg
2286 #define netdev_vdbg(dev, format, args...) \
2289 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2295 * netdev_WARN() acts like dev_printk(), but with the key difference
2296 * of using a WARN/WARN_ON to get the message out, including the
2297 * file/line information and a backtrace.
2299 #define netdev_WARN(dev, format, args...) \
2300 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2302 /* netif printk helpers, similar to netdev_printk */
2304 #define netif_printk(priv, type, level, dev, fmt, args...) \
2306 if (netif_msg_##type(priv)) \
2307 netdev_printk(level, (dev), fmt, ##args); \
2310 #define netif_level(level, priv, type, dev, fmt, args...) \
2312 if (netif_msg_##type(priv)) \
2313 netdev_##level(dev, fmt, ##args); \
2316 #define netif_emerg(priv, type, dev, fmt, args...) \
2317 netif_level(emerg, priv, type, dev, fmt, ##args)
2318 #define netif_alert(priv, type, dev, fmt, args...) \
2319 netif_level(alert, priv, type, dev, fmt, ##args)
2320 #define netif_crit(priv, type, dev, fmt, args...) \
2321 netif_level(crit, priv, type, dev, fmt, ##args)
2322 #define netif_err(priv, type, dev, fmt, args...) \
2323 netif_level(err, priv, type, dev, fmt, ##args)
2324 #define netif_warn(priv, type, dev, fmt, args...) \
2325 netif_level(warn, priv, type, dev, fmt, ##args)
2326 #define netif_notice(priv, type, dev, fmt, args...) \
2327 netif_level(notice, priv, type, dev, fmt, ##args)
2328 #define netif_info(priv, type, dev, fmt, args...) \
2329 netif_level(info, priv, type, dev, fmt, ##args)
2332 #define netif_dbg(priv, type, dev, format, args...) \
2333 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2334 #elif defined(CONFIG_DYNAMIC_DEBUG)
2335 #define netif_dbg(priv, type, netdev, format, args...) \
2337 if (netif_msg_##type(priv)) \
2338 dynamic_dev_dbg((netdev)->dev.parent, \
2340 netdev_name(netdev), ##args); \
2343 #define netif_dbg(priv, type, dev, format, args...) \
2346 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2351 #if defined(VERBOSE_DEBUG)
2352 #define netif_vdbg netif_dbg
2354 #define netif_vdbg(priv, type, dev, format, args...) \
2357 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2362 #endif /* __KERNEL__ */
2364 #endif /* _LINUX_NETDEVICE_H */