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>
60 /* source back-compat hooks */
61 #define SET_ETHTOOL_OPS(netdev,ops) \
62 ( (netdev)->ethtool_ops = (ops) )
64 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
65 functions are available. */
66 #define HAVE_FREE_NETDEV /* free_netdev() */
67 #define HAVE_NETDEV_PRIV /* netdev_priv() */
69 /* Backlog congestion levels */
70 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
71 #define NET_RX_DROP 1 /* packet dropped */
74 * Transmit return codes: transmit return codes originate from three different
77 * - qdisc return codes
78 * - driver transmit return codes
81 * Drivers are allowed to return any one of those in their hard_start_xmit()
82 * function. Real network devices commonly used with qdiscs should only return
83 * the driver transmit return codes though - when qdiscs are used, the actual
84 * transmission happens asynchronously, so the value is not propagated to
85 * higher layers. Virtual network devices transmit synchronously, in this case
86 * the driver transmit return codes are consumed by dev_queue_xmit(), all
87 * others are propagated to higher layers.
90 /* qdisc ->enqueue() return codes. */
91 #define NET_XMIT_SUCCESS 0x00
92 #define NET_XMIT_DROP 0x01 /* skb dropped */
93 #define NET_XMIT_CN 0x02 /* congestion notification */
94 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
95 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
97 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
98 * indicates that the device will soon be dropping packets, or already drops
99 * some packets of the same priority; prompting us to send less aggressively. */
100 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
101 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
103 /* Driver transmit return codes */
104 #define NETDEV_TX_MASK 0xf0
107 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
108 NETDEV_TX_OK = 0x00, /* driver took care of packet */
109 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
110 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
112 typedef enum netdev_tx netdev_tx_t;
115 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
116 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
118 static inline bool dev_xmit_complete(int rc)
121 * Positive cases with an skb consumed by a driver:
122 * - successful transmission (rc == NETDEV_TX_OK)
123 * - error while transmitting (rc < 0)
124 * - error while queueing to a different device (rc & NET_XMIT_MASK)
126 if (likely(rc < NET_XMIT_MASK))
134 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
138 * Compute the worst case header length according to the protocols
142 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
143 # if defined(CONFIG_MAC80211_MESH)
144 # define LL_MAX_HEADER 128
146 # define LL_MAX_HEADER 96
148 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
149 # define LL_MAX_HEADER 48
151 # define LL_MAX_HEADER 32
154 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
155 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
156 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
157 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
158 #define MAX_HEADER LL_MAX_HEADER
160 #define MAX_HEADER (LL_MAX_HEADER + 48)
164 * Old network device statistics. Fields are native words
165 * (unsigned long) so they can be read and written atomically.
168 struct net_device_stats {
169 unsigned long rx_packets;
170 unsigned long tx_packets;
171 unsigned long rx_bytes;
172 unsigned long tx_bytes;
173 unsigned long rx_errors;
174 unsigned long tx_errors;
175 unsigned long rx_dropped;
176 unsigned long tx_dropped;
177 unsigned long multicast;
178 unsigned long collisions;
179 unsigned long rx_length_errors;
180 unsigned long rx_over_errors;
181 unsigned long rx_crc_errors;
182 unsigned long rx_frame_errors;
183 unsigned long rx_fifo_errors;
184 unsigned long rx_missed_errors;
185 unsigned long tx_aborted_errors;
186 unsigned long tx_carrier_errors;
187 unsigned long tx_fifo_errors;
188 unsigned long tx_heartbeat_errors;
189 unsigned long tx_window_errors;
190 unsigned long rx_compressed;
191 unsigned long tx_compressed;
194 #endif /* __KERNEL__ */
197 /* Media selection options. */
210 #include <linux/cache.h>
211 #include <linux/skbuff.h>
217 struct netdev_hw_addr {
218 struct list_head list;
219 unsigned char addr[MAX_ADDR_LEN];
221 #define NETDEV_HW_ADDR_T_LAN 1
222 #define NETDEV_HW_ADDR_T_SAN 2
223 #define NETDEV_HW_ADDR_T_SLAVE 3
224 #define NETDEV_HW_ADDR_T_UNICAST 4
225 #define NETDEV_HW_ADDR_T_MULTICAST 5
229 struct rcu_head rcu_head;
232 struct netdev_hw_addr_list {
233 struct list_head list;
237 #define netdev_hw_addr_list_count(l) ((l)->count)
238 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
239 #define netdev_hw_addr_list_for_each(ha, l) \
240 list_for_each_entry(ha, &(l)->list, list)
242 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
243 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
244 #define netdev_for_each_uc_addr(ha, dev) \
245 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
247 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
248 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
249 #define netdev_for_each_mc_addr(ha, dev) \
250 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
253 struct hh_cache *hh_next; /* Next entry */
254 atomic_t hh_refcnt; /* number of users */
256 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
258 * They are mostly read, but hh_refcnt may be changed quite frequently,
259 * incurring cache line ping pongs.
261 __be16 hh_type ____cacheline_aligned_in_smp;
262 /* protocol identifier, f.e ETH_P_IP
263 * NOTE: For VLANs, this will be the
264 * encapuslated type. --BLG
266 u16 hh_len; /* length of header */
267 int (*hh_output)(struct sk_buff *skb);
270 /* cached hardware header; allow for machine alignment needs. */
271 #define HH_DATA_MOD 16
272 #define HH_DATA_OFF(__len) \
273 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
274 #define HH_DATA_ALIGN(__len) \
275 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
276 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
279 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
281 * dev->hard_header_len ? (dev->hard_header_len +
282 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
284 * We could use other alignment values, but we must maintain the
285 * relationship HH alignment <= LL alignment.
287 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
290 #define LL_RESERVED_SPACE(dev) \
291 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
292 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
293 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
294 #define LL_ALLOCATED_SPACE(dev) \
295 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
298 int (*create) (struct sk_buff *skb, struct net_device *dev,
299 unsigned short type, const void *daddr,
300 const void *saddr, unsigned len);
301 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
302 int (*rebuild)(struct sk_buff *skb);
303 #define HAVE_HEADER_CACHE
304 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
305 void (*cache_update)(struct hh_cache *hh,
306 const struct net_device *dev,
307 const unsigned char *haddr);
310 /* These flag bits are private to the generic network queueing
311 * layer, they may not be explicitly referenced by any other
315 enum netdev_state_t {
317 __LINK_STATE_PRESENT,
318 __LINK_STATE_NOCARRIER,
319 __LINK_STATE_LINKWATCH_PENDING,
320 __LINK_STATE_DORMANT,
325 * This structure holds at boot time configured netdevice settings. They
326 * are then used in the device probing.
328 struct netdev_boot_setup {
332 #define NETDEV_BOOT_SETUP_MAX 8
334 extern int __init netdev_boot_setup(char *str);
337 * Structure for NAPI scheduling similar to tasklet but with weighting
340 /* The poll_list must only be managed by the entity which
341 * changes the state of the NAPI_STATE_SCHED bit. This means
342 * whoever atomically sets that bit can add this napi_struct
343 * to the per-cpu poll_list, and whoever clears that bit
344 * can remove from the list right before clearing the bit.
346 struct list_head poll_list;
350 int (*poll)(struct napi_struct *, int);
351 #ifdef CONFIG_NETPOLL
352 spinlock_t poll_lock;
356 unsigned int gro_count;
358 struct net_device *dev;
359 struct list_head dev_list;
360 struct sk_buff *gro_list;
365 NAPI_STATE_SCHED, /* Poll is scheduled */
366 NAPI_STATE_DISABLE, /* Disable pending */
367 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
377 typedef enum gro_result gro_result_t;
379 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
381 extern void __napi_schedule(struct napi_struct *n);
383 static inline int napi_disable_pending(struct napi_struct *n)
385 return test_bit(NAPI_STATE_DISABLE, &n->state);
389 * napi_schedule_prep - check if napi can be scheduled
392 * Test if NAPI routine is already running, and if not mark
393 * it as running. This is used as a condition variable
394 * insure only one NAPI poll instance runs. We also make
395 * sure there is no pending NAPI disable.
397 static inline int napi_schedule_prep(struct napi_struct *n)
399 return !napi_disable_pending(n) &&
400 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
404 * napi_schedule - schedule NAPI poll
407 * Schedule NAPI poll routine to be called if it is not already
410 static inline void napi_schedule(struct napi_struct *n)
412 if (napi_schedule_prep(n))
416 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
417 static inline int napi_reschedule(struct napi_struct *napi)
419 if (napi_schedule_prep(napi)) {
420 __napi_schedule(napi);
427 * napi_complete - NAPI processing complete
430 * Mark NAPI processing as complete.
432 extern void __napi_complete(struct napi_struct *n);
433 extern void napi_complete(struct napi_struct *n);
436 * napi_disable - prevent NAPI from scheduling
439 * Stop NAPI from being scheduled on this context.
440 * Waits till any outstanding processing completes.
442 static inline void napi_disable(struct napi_struct *n)
444 set_bit(NAPI_STATE_DISABLE, &n->state);
445 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
447 clear_bit(NAPI_STATE_DISABLE, &n->state);
451 * napi_enable - enable NAPI scheduling
454 * Resume NAPI from being scheduled on this context.
455 * Must be paired with napi_disable.
457 static inline void napi_enable(struct napi_struct *n)
459 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
460 smp_mb__before_clear_bit();
461 clear_bit(NAPI_STATE_SCHED, &n->state);
466 * napi_synchronize - wait until NAPI is not running
469 * Wait until NAPI is done being scheduled on this context.
470 * Waits till any outstanding processing completes but
471 * does not disable future activations.
473 static inline void napi_synchronize(const struct napi_struct *n)
475 while (test_bit(NAPI_STATE_SCHED, &n->state))
479 # define napi_synchronize(n) barrier()
482 enum netdev_queue_state_t {
484 __QUEUE_STATE_FROZEN,
487 struct netdev_queue {
491 struct net_device *dev;
494 struct Qdisc *qdisc_sleeping;
498 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
501 * please use this field instead of dev->trans_start
503 unsigned long trans_start;
504 unsigned long tx_bytes;
505 unsigned long tx_packets;
506 unsigned long tx_dropped;
507 } ____cacheline_aligned_in_smp;
511 * This structure holds an RPS map which can be of variable length. The
512 * map is an array of CPUs.
519 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
522 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
523 * tail pointer for that CPU's input queue at the time of last enqueue.
525 struct rps_dev_flow {
528 unsigned int last_qtail;
532 * The rps_dev_flow_table structure contains a table of flow mappings.
534 struct rps_dev_flow_table {
537 struct work_struct free_work;
538 struct rps_dev_flow flows[0];
540 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
541 (_num * sizeof(struct rps_dev_flow)))
544 * The rps_sock_flow_table contains mappings of flows to the last CPU
545 * on which they were processed by the application (set in recvmsg).
547 struct rps_sock_flow_table {
551 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
552 (_num * sizeof(u16)))
554 #define RPS_NO_CPU 0xffff
556 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
560 unsigned int cpu, index = hash & table->mask;
562 /* We only give a hint, preemption can change cpu under us */
563 cpu = raw_smp_processor_id();
565 if (table->ents[index] != cpu)
566 table->ents[index] = cpu;
570 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
574 table->ents[hash & table->mask] = RPS_NO_CPU;
577 extern struct rps_sock_flow_table *rps_sock_flow_table;
579 /* This structure contains an instance of an RX queue. */
580 struct netdev_rx_queue {
581 struct rps_map *rps_map;
582 struct rps_dev_flow_table *rps_flow_table;
584 struct netdev_rx_queue *first;
586 } ____cacheline_aligned_in_smp;
587 #endif /* CONFIG_RPS */
590 * This structure defines the management hooks for network devices.
591 * The following hooks can be defined; unless noted otherwise, they are
592 * optional and can be filled with a null pointer.
594 * int (*ndo_init)(struct net_device *dev);
595 * This function is called once when network device is registered.
596 * The network device can use this to any late stage initializaton
597 * or semantic validattion. It can fail with an error code which will
598 * be propogated back to register_netdev
600 * void (*ndo_uninit)(struct net_device *dev);
601 * This function is called when device is unregistered or when registration
602 * fails. It is not called if init fails.
604 * int (*ndo_open)(struct net_device *dev);
605 * This function is called when network device transistions to the up
608 * int (*ndo_stop)(struct net_device *dev);
609 * This function is called when network device transistions to the down
612 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
613 * struct net_device *dev);
614 * Called when a packet needs to be transmitted.
615 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
616 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
617 * Required can not be NULL.
619 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
620 * Called to decide which queue to when device supports multiple
623 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
624 * This function is called to allow device receiver to make
625 * changes to configuration when multicast or promiscious is enabled.
627 * void (*ndo_set_rx_mode)(struct net_device *dev);
628 * This function is called device changes address list filtering.
630 * void (*ndo_set_multicast_list)(struct net_device *dev);
631 * This function is called when the multicast address list changes.
633 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
634 * This function is called when the Media Access Control address
635 * needs to be changed. If this interface is not defined, the
636 * mac address can not be changed.
638 * int (*ndo_validate_addr)(struct net_device *dev);
639 * Test if Media Access Control address is valid for the device.
641 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
642 * Called when a user request an ioctl which can't be handled by
643 * the generic interface code. If not defined ioctl's return
644 * not supported error code.
646 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
647 * Used to set network devices bus interface parameters. This interface
648 * is retained for legacy reason, new devices should use the bus
649 * interface (PCI) for low level management.
651 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
652 * Called when a user wants to change the Maximum Transfer Unit
653 * of a device. If not defined, any request to change MTU will
654 * will return an error.
656 * void (*ndo_tx_timeout)(struct net_device *dev);
657 * Callback uses when the transmitter has not made any progress
658 * for dev->watchdog ticks.
660 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
661 * struct rtnl_link_stats64 *storage);
662 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
663 * Called when a user wants to get the network device usage
664 * statistics. Drivers must do one of the following:
665 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
666 * rtnl_link_stats64 structure passed by the caller.
667 * 2. Define @ndo_get_stats to update a net_device_stats structure
668 * (which should normally be dev->stats) and return a pointer to
669 * it. The structure may be changed asynchronously only if each
670 * field is written atomically.
671 * 3. Update dev->stats asynchronously and atomically, and define
674 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
675 * If device support VLAN receive accleration
676 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
677 * when vlan groups for the device changes. Note: grp is NULL
678 * if no vlan's groups are being used.
680 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
681 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
682 * this function is called when a VLAN id is registered.
684 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
685 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
686 * this function is called when a VLAN id is unregistered.
688 * void (*ndo_poll_controller)(struct net_device *dev);
690 * SR-IOV management functions.
691 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
692 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
693 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
694 * int (*ndo_get_vf_config)(struct net_device *dev,
695 * int vf, struct ifla_vf_info *ivf);
696 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
697 * struct nlattr *port[]);
698 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
700 #define HAVE_NET_DEVICE_OPS
701 struct net_device_ops {
702 int (*ndo_init)(struct net_device *dev);
703 void (*ndo_uninit)(struct net_device *dev);
704 int (*ndo_open)(struct net_device *dev);
705 int (*ndo_stop)(struct net_device *dev);
706 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
707 struct net_device *dev);
708 u16 (*ndo_select_queue)(struct net_device *dev,
709 struct sk_buff *skb);
710 void (*ndo_change_rx_flags)(struct net_device *dev,
712 void (*ndo_set_rx_mode)(struct net_device *dev);
713 void (*ndo_set_multicast_list)(struct net_device *dev);
714 int (*ndo_set_mac_address)(struct net_device *dev,
716 int (*ndo_validate_addr)(struct net_device *dev);
717 int (*ndo_do_ioctl)(struct net_device *dev,
718 struct ifreq *ifr, int cmd);
719 int (*ndo_set_config)(struct net_device *dev,
721 int (*ndo_change_mtu)(struct net_device *dev,
723 int (*ndo_neigh_setup)(struct net_device *dev,
724 struct neigh_parms *);
725 void (*ndo_tx_timeout) (struct net_device *dev);
727 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
728 struct rtnl_link_stats64 *storage);
729 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
731 void (*ndo_vlan_rx_register)(struct net_device *dev,
732 struct vlan_group *grp);
733 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
735 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
737 #ifdef CONFIG_NET_POLL_CONTROLLER
738 void (*ndo_poll_controller)(struct net_device *dev);
739 int (*ndo_netpoll_setup)(struct net_device *dev,
740 struct netpoll_info *info);
741 void (*ndo_netpoll_cleanup)(struct net_device *dev);
743 int (*ndo_set_vf_mac)(struct net_device *dev,
745 int (*ndo_set_vf_vlan)(struct net_device *dev,
746 int queue, u16 vlan, u8 qos);
747 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
749 int (*ndo_get_vf_config)(struct net_device *dev,
751 struct ifla_vf_info *ivf);
752 int (*ndo_set_vf_port)(struct net_device *dev,
754 struct nlattr *port[]);
755 int (*ndo_get_vf_port)(struct net_device *dev,
756 int vf, struct sk_buff *skb);
757 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
758 int (*ndo_fcoe_enable)(struct net_device *dev);
759 int (*ndo_fcoe_disable)(struct net_device *dev);
760 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
762 struct scatterlist *sgl,
764 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
766 #define NETDEV_FCOE_WWNN 0
767 #define NETDEV_FCOE_WWPN 1
768 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
774 * The DEVICE structure.
775 * Actually, this whole structure is a big mistake. It mixes I/O
776 * data with strictly "high-level" data, and it has to know about
777 * almost every data structure used in the INET module.
779 * FIXME: cleanup struct net_device such that network protocol info
786 * This is the first field of the "visible" part of this structure
787 * (i.e. as seen by users in the "Space.c" file). It is the name
792 struct pm_qos_request_list *pm_qos_req;
794 /* device name hash chain */
795 struct hlist_node name_hlist;
800 * I/O specific fields
801 * FIXME: Merge these and struct ifmap into one
803 unsigned long mem_end; /* shared mem end */
804 unsigned long mem_start; /* shared mem start */
805 unsigned long base_addr; /* device I/O address */
806 unsigned int irq; /* device IRQ number */
809 * Some hardware also needs these fields, but they are not
810 * part of the usual set specified in Space.c.
813 unsigned char if_port; /* Selectable AUI, TP,..*/
814 unsigned char dma; /* DMA channel */
818 struct list_head dev_list;
819 struct list_head napi_list;
820 struct list_head unreg_list;
822 /* Net device features */
823 unsigned long features;
824 #define NETIF_F_SG 1 /* Scatter/gather IO. */
825 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
826 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
827 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
828 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
829 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
830 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
831 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
832 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
833 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
834 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
835 #define NETIF_F_GSO 2048 /* Enable software GSO. */
836 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
837 /* do not use LLTX in new drivers */
838 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
839 #define NETIF_F_GRO 16384 /* Generic receive offload */
840 #define NETIF_F_LRO 32768 /* large receive offload */
842 /* the GSO_MASK reserves bits 16 through 23 */
843 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
844 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
845 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
846 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
847 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
849 /* Segmentation offload features */
850 #define NETIF_F_GSO_SHIFT 16
851 #define NETIF_F_GSO_MASK 0x00ff0000
852 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
853 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
854 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
855 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
856 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
857 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
859 /* List of features with software fallbacks. */
860 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
861 NETIF_F_TSO6 | NETIF_F_UFO)
864 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
865 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
866 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
867 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
870 * If one device supports one of these features, then enable them
871 * for all in netdev_increment_features.
873 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
874 NETIF_F_SG | NETIF_F_HIGHDMA | \
877 /* Interface index. Unique device identifier */
881 struct net_device_stats stats;
883 #ifdef CONFIG_WIRELESS_EXT
884 /* List of functions to handle Wireless Extensions (instead of ioctl).
885 * See <net/iw_handler.h> for details. Jean II */
886 const struct iw_handler_def * wireless_handlers;
887 /* Instance data managed by the core of Wireless Extensions. */
888 struct iw_public_data * wireless_data;
890 /* Management operations */
891 const struct net_device_ops *netdev_ops;
892 const struct ethtool_ops *ethtool_ops;
894 /* Hardware header description */
895 const struct header_ops *header_ops;
897 unsigned int flags; /* interface flags (a la BSD) */
898 unsigned short gflags;
899 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
900 unsigned short padded; /* How much padding added by alloc_netdev() */
902 unsigned char operstate; /* RFC2863 operstate */
903 unsigned char link_mode; /* mapping policy to operstate */
905 unsigned int mtu; /* interface MTU value */
906 unsigned short type; /* interface hardware type */
907 unsigned short hard_header_len; /* hardware hdr length */
909 /* extra head- and tailroom the hardware may need, but not in all cases
910 * can this be guaranteed, especially tailroom. Some cases also use
911 * LL_MAX_HEADER instead to allocate the skb.
913 unsigned short needed_headroom;
914 unsigned short needed_tailroom;
916 struct net_device *master; /* Pointer to master device of a group,
917 * which this device is member of.
920 /* Interface address info. */
921 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
922 unsigned char addr_len; /* hardware address length */
923 unsigned short dev_id; /* for shared network cards */
925 spinlock_t addr_list_lock;
926 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
927 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
929 unsigned int promiscuity;
930 unsigned int allmulti;
933 /* Protocol specific pointers */
935 #ifdef CONFIG_NET_DSA
936 void *dsa_ptr; /* dsa specific data */
938 void *atalk_ptr; /* AppleTalk link */
939 void *ip_ptr; /* IPv4 specific data */
940 void *dn_ptr; /* DECnet specific data */
941 void *ip6_ptr; /* IPv6 specific data */
942 void *ec_ptr; /* Econet specific data */
943 void *ax25_ptr; /* AX.25 specific data */
944 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
945 assign before registering */
948 * Cache line mostly used on receive path (including eth_type_trans())
950 unsigned long last_rx; /* Time of last Rx */
951 /* Interface address info used in eth_type_trans() */
952 unsigned char *dev_addr; /* hw address, (before bcast
953 because most packets are
956 struct netdev_hw_addr_list dev_addrs; /* list of device
959 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
962 struct kset *queues_kset;
964 struct netdev_rx_queue *_rx;
966 /* Number of RX queues allocated at alloc_netdev_mq() time */
967 unsigned int num_rx_queues;
970 struct netdev_queue rx_queue;
971 rx_handler_func_t *rx_handler;
972 void *rx_handler_data;
974 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
976 /* Number of TX queues allocated at alloc_netdev_mq() time */
977 unsigned int num_tx_queues;
979 /* Number of TX queues currently active in device */
980 unsigned int real_num_tx_queues;
982 /* root qdisc from userspace point of view */
985 unsigned long tx_queue_len; /* Max frames per queue allowed */
986 spinlock_t tx_global_lock;
988 * One part is mostly used on xmit path (device)
990 /* These may be needed for future network-power-down code. */
993 * trans_start here is expensive for high speed devices on SMP,
994 * please use netdev_queue->trans_start instead.
996 unsigned long trans_start; /* Time (in jiffies) of last Tx */
998 int watchdog_timeo; /* used by dev_watchdog() */
999 struct timer_list watchdog_timer;
1001 /* Number of references to this device */
1002 atomic_t refcnt ____cacheline_aligned_in_smp;
1004 /* delayed register/unregister */
1005 struct list_head todo_list;
1006 /* device index hash chain */
1007 struct hlist_node index_hlist;
1009 struct list_head link_watch_list;
1011 /* register/unregister state machine */
1012 enum { NETREG_UNINITIALIZED=0,
1013 NETREG_REGISTERED, /* completed register_netdevice */
1014 NETREG_UNREGISTERING, /* called unregister_netdevice */
1015 NETREG_UNREGISTERED, /* completed unregister todo */
1016 NETREG_RELEASED, /* called free_netdev */
1017 NETREG_DUMMY, /* dummy device for NAPI poll */
1021 RTNL_LINK_INITIALIZED,
1022 RTNL_LINK_INITIALIZING,
1023 } rtnl_link_state:16;
1025 /* Called from unregister, can be used to call free_netdev */
1026 void (*destructor)(struct net_device *dev);
1028 #ifdef CONFIG_NETPOLL
1029 struct netpoll_info *npinfo;
1032 #ifdef CONFIG_NET_NS
1033 /* Network namespace this network device is inside */
1037 /* mid-layer private */
1041 struct garp_port *garp_port;
1043 /* class/net/name entry */
1045 /* space for optional device, statistics, and wireless sysfs groups */
1046 const struct attribute_group *sysfs_groups[4];
1048 /* rtnetlink link ops */
1049 const struct rtnl_link_ops *rtnl_link_ops;
1051 /* VLAN feature mask */
1052 unsigned long vlan_features;
1054 /* for setting kernel sock attribute on TCP connection setup */
1055 #define GSO_MAX_SIZE 65536
1056 unsigned int gso_max_size;
1059 /* Data Center Bridging netlink ops */
1060 const struct dcbnl_rtnl_ops *dcbnl_ops;
1063 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1064 /* max exchange id for FCoE LRO by ddp */
1065 unsigned int fcoe_ddp_xid;
1067 /* n-tuple filter list attached to this device */
1068 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1070 /* phy device may attach itself for hardware timestamping */
1071 struct phy_device *phydev;
1073 #define to_net_dev(d) container_of(d, struct net_device, dev)
1075 #define NETDEV_ALIGN 32
1078 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1081 return &dev->_tx[index];
1084 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1085 void (*f)(struct net_device *,
1086 struct netdev_queue *,
1092 for (i = 0; i < dev->num_tx_queues; i++)
1093 f(dev, &dev->_tx[i], arg);
1097 * Net namespace inlines
1100 struct net *dev_net(const struct net_device *dev)
1102 return read_pnet(&dev->nd_net);
1106 void dev_net_set(struct net_device *dev, struct net *net)
1108 #ifdef CONFIG_NET_NS
1109 release_net(dev->nd_net);
1110 dev->nd_net = hold_net(net);
1114 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1116 #ifdef CONFIG_NET_DSA_TAG_DSA
1117 if (dev->dsa_ptr != NULL)
1118 return dsa_uses_dsa_tags(dev->dsa_ptr);
1124 #ifndef CONFIG_NET_NS
1125 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1129 #else /* CONFIG_NET_NS */
1130 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1133 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1135 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1136 if (dev->dsa_ptr != NULL)
1137 return dsa_uses_trailer_tags(dev->dsa_ptr);
1144 * netdev_priv - access network device private data
1145 * @dev: network device
1147 * Get network device private data
1149 static inline void *netdev_priv(const struct net_device *dev)
1151 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1154 /* Set the sysfs physical device reference for the network logical device
1155 * if set prior to registration will cause a symlink during initialization.
1157 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1159 /* Set the sysfs device type for the network logical device to allow
1160 * fin grained indentification of different network device types. For
1161 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1163 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1166 * netif_napi_add - initialize a napi context
1167 * @dev: network device
1168 * @napi: napi context
1169 * @poll: polling function
1170 * @weight: default weight
1172 * netif_napi_add() must be used to initialize a napi context prior to calling
1173 * *any* of the other napi related functions.
1175 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1176 int (*poll)(struct napi_struct *, int), int weight);
1179 * netif_napi_del - remove a napi context
1180 * @napi: napi context
1182 * netif_napi_del() removes a napi context from the network device napi list
1184 void netif_napi_del(struct napi_struct *napi);
1186 struct napi_gro_cb {
1187 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1190 /* Length of frag0. */
1191 unsigned int frag0_len;
1193 /* This indicates where we are processing relative to skb->data. */
1196 /* This is non-zero if the packet may be of the same flow. */
1199 /* This is non-zero if the packet cannot be merged with the new skb. */
1202 /* Number of segments aggregated. */
1209 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1211 struct packet_type {
1212 __be16 type; /* This is really htons(ether_type). */
1213 struct net_device *dev; /* NULL is wildcarded here */
1214 int (*func) (struct sk_buff *,
1215 struct net_device *,
1216 struct packet_type *,
1217 struct net_device *);
1218 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1220 int (*gso_send_check)(struct sk_buff *skb);
1221 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1222 struct sk_buff *skb);
1223 int (*gro_complete)(struct sk_buff *skb);
1224 void *af_packet_priv;
1225 struct list_head list;
1228 #include <linux/interrupt.h>
1229 #include <linux/notifier.h>
1231 extern rwlock_t dev_base_lock; /* Device list lock */
1234 #define for_each_netdev(net, d) \
1235 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1236 #define for_each_netdev_reverse(net, d) \
1237 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1238 #define for_each_netdev_rcu(net, d) \
1239 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1240 #define for_each_netdev_safe(net, d, n) \
1241 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1242 #define for_each_netdev_continue(net, d) \
1243 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1244 #define for_each_netdev_continue_rcu(net, d) \
1245 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1246 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1248 static inline struct net_device *next_net_device(struct net_device *dev)
1250 struct list_head *lh;
1254 lh = dev->dev_list.next;
1255 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1258 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1260 struct list_head *lh;
1264 lh = rcu_dereference(dev->dev_list.next);
1265 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1268 static inline struct net_device *first_net_device(struct net *net)
1270 return list_empty(&net->dev_base_head) ? NULL :
1271 net_device_entry(net->dev_base_head.next);
1274 extern int netdev_boot_setup_check(struct net_device *dev);
1275 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1276 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1277 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1278 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1279 extern void dev_add_pack(struct packet_type *pt);
1280 extern void dev_remove_pack(struct packet_type *pt);
1281 extern void __dev_remove_pack(struct packet_type *pt);
1283 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1284 unsigned short mask);
1285 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1286 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1287 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1288 extern int dev_alloc_name(struct net_device *dev, const char *name);
1289 extern int dev_open(struct net_device *dev);
1290 extern int dev_close(struct net_device *dev);
1291 extern void dev_disable_lro(struct net_device *dev);
1292 extern int dev_queue_xmit(struct sk_buff *skb);
1293 extern int register_netdevice(struct net_device *dev);
1294 extern void unregister_netdevice_queue(struct net_device *dev,
1295 struct list_head *head);
1296 extern void unregister_netdevice_many(struct list_head *head);
1297 static inline void unregister_netdevice(struct net_device *dev)
1299 unregister_netdevice_queue(dev, NULL);
1302 extern void free_netdev(struct net_device *dev);
1303 extern void synchronize_net(void);
1304 extern int register_netdevice_notifier(struct notifier_block *nb);
1305 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1306 extern int init_dummy_netdev(struct net_device *dev);
1307 extern void netdev_resync_ops(struct net_device *dev);
1309 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1310 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1311 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1312 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1313 extern int dev_restart(struct net_device *dev);
1314 #ifdef CONFIG_NETPOLL_TRAP
1315 extern int netpoll_trap(void);
1317 extern int skb_gro_receive(struct sk_buff **head,
1318 struct sk_buff *skb);
1319 extern void skb_gro_reset_offset(struct sk_buff *skb);
1321 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1323 return NAPI_GRO_CB(skb)->data_offset;
1326 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1328 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1331 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1333 NAPI_GRO_CB(skb)->data_offset += len;
1336 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1337 unsigned int offset)
1339 return NAPI_GRO_CB(skb)->frag0 + offset;
1342 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1344 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1347 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1348 unsigned int offset)
1350 NAPI_GRO_CB(skb)->frag0 = NULL;
1351 NAPI_GRO_CB(skb)->frag0_len = 0;
1352 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1355 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1357 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1360 static inline void *skb_gro_network_header(struct sk_buff *skb)
1362 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1363 skb_network_offset(skb);
1366 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1367 unsigned short type,
1368 const void *daddr, const void *saddr,
1371 if (!dev->header_ops || !dev->header_ops->create)
1374 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1377 static inline int dev_parse_header(const struct sk_buff *skb,
1378 unsigned char *haddr)
1380 const struct net_device *dev = skb->dev;
1382 if (!dev->header_ops || !dev->header_ops->parse)
1384 return dev->header_ops->parse(skb, haddr);
1387 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1388 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1389 static inline int unregister_gifconf(unsigned int family)
1391 return register_gifconf(family, NULL);
1395 * Incoming packets are placed on per-cpu queues
1397 struct softnet_data {
1398 struct Qdisc *output_queue;
1399 struct Qdisc **output_queue_tailp;
1400 struct list_head poll_list;
1401 struct sk_buff *completion_queue;
1402 struct sk_buff_head process_queue;
1405 unsigned int processed;
1406 unsigned int time_squeeze;
1407 unsigned int cpu_collision;
1408 unsigned int received_rps;
1411 struct softnet_data *rps_ipi_list;
1413 /* Elements below can be accessed between CPUs for RPS */
1414 struct call_single_data csd ____cacheline_aligned_in_smp;
1415 struct softnet_data *rps_ipi_next;
1417 unsigned int input_queue_head;
1418 unsigned int input_queue_tail;
1421 struct sk_buff_head input_pkt_queue;
1422 struct napi_struct backlog;
1425 static inline void input_queue_head_incr(struct softnet_data *sd)
1428 sd->input_queue_head++;
1432 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1433 unsigned int *qtail)
1436 *qtail = ++sd->input_queue_tail;
1440 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1442 #define HAVE_NETIF_QUEUE
1444 extern void __netif_schedule(struct Qdisc *q);
1446 static inline void netif_schedule_queue(struct netdev_queue *txq)
1448 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1449 __netif_schedule(txq->qdisc);
1452 static inline void netif_tx_schedule_all(struct net_device *dev)
1456 for (i = 0; i < dev->num_tx_queues; i++)
1457 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1460 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1462 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1466 * netif_start_queue - allow transmit
1467 * @dev: network device
1469 * Allow upper layers to call the device hard_start_xmit routine.
1471 static inline void netif_start_queue(struct net_device *dev)
1473 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1476 static inline void netif_tx_start_all_queues(struct net_device *dev)
1480 for (i = 0; i < dev->num_tx_queues; i++) {
1481 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1482 netif_tx_start_queue(txq);
1486 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1488 #ifdef CONFIG_NETPOLL_TRAP
1489 if (netpoll_trap()) {
1490 netif_tx_start_queue(dev_queue);
1494 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1495 __netif_schedule(dev_queue->qdisc);
1499 * netif_wake_queue - restart transmit
1500 * @dev: network device
1502 * Allow upper layers to call the device hard_start_xmit routine.
1503 * Used for flow control when transmit resources are available.
1505 static inline void netif_wake_queue(struct net_device *dev)
1507 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1510 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1514 for (i = 0; i < dev->num_tx_queues; i++) {
1515 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1516 netif_tx_wake_queue(txq);
1520 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1522 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1526 * netif_stop_queue - stop transmitted packets
1527 * @dev: network device
1529 * Stop upper layers calling the device hard_start_xmit routine.
1530 * Used for flow control when transmit resources are unavailable.
1532 static inline void netif_stop_queue(struct net_device *dev)
1534 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1537 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1541 for (i = 0; i < dev->num_tx_queues; i++) {
1542 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1543 netif_tx_stop_queue(txq);
1547 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1549 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1553 * netif_queue_stopped - test if transmit queue is flowblocked
1554 * @dev: network device
1556 * Test if transmit queue on device is currently unable to send.
1558 static inline int netif_queue_stopped(const struct net_device *dev)
1560 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1563 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1565 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1569 * netif_running - test if up
1570 * @dev: network device
1572 * Test if the device has been brought up.
1574 static inline int netif_running(const struct net_device *dev)
1576 return test_bit(__LINK_STATE_START, &dev->state);
1580 * Routines to manage the subqueues on a device. We only need start
1581 * stop, and a check if it's stopped. All other device management is
1582 * done at the overall netdevice level.
1583 * Also test the device if we're multiqueue.
1587 * netif_start_subqueue - allow sending packets on subqueue
1588 * @dev: network device
1589 * @queue_index: sub queue index
1591 * Start individual transmit queue of a device with multiple transmit queues.
1593 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1595 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1597 netif_tx_start_queue(txq);
1601 * netif_stop_subqueue - stop sending packets on subqueue
1602 * @dev: network device
1603 * @queue_index: sub queue index
1605 * Stop individual transmit queue of a device with multiple transmit queues.
1607 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1609 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1610 #ifdef CONFIG_NETPOLL_TRAP
1614 netif_tx_stop_queue(txq);
1618 * netif_subqueue_stopped - test status of subqueue
1619 * @dev: network device
1620 * @queue_index: sub queue index
1622 * Check individual transmit queue of a device with multiple transmit queues.
1624 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1627 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1629 return netif_tx_queue_stopped(txq);
1632 static inline int netif_subqueue_stopped(const struct net_device *dev,
1633 struct sk_buff *skb)
1635 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1639 * netif_wake_subqueue - allow sending packets on subqueue
1640 * @dev: network device
1641 * @queue_index: sub queue index
1643 * Resume individual transmit queue of a device with multiple transmit queues.
1645 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1647 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1648 #ifdef CONFIG_NETPOLL_TRAP
1652 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1653 __netif_schedule(txq->qdisc);
1657 * netif_is_multiqueue - test if device has multiple transmit queues
1658 * @dev: network device
1660 * Check if device has multiple transmit queues
1662 static inline int netif_is_multiqueue(const struct net_device *dev)
1664 return (dev->num_tx_queues > 1);
1667 extern void netif_set_real_num_tx_queues(struct net_device *dev,
1670 /* Use this variant when it is known for sure that it
1671 * is executing from hardware interrupt context or with hardware interrupts
1674 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1676 /* Use this variant in places where it could be invoked
1677 * from either hardware interrupt or other context, with hardware interrupts
1678 * either disabled or enabled.
1680 extern void dev_kfree_skb_any(struct sk_buff *skb);
1682 #define HAVE_NETIF_RX 1
1683 extern int netif_rx(struct sk_buff *skb);
1684 extern int netif_rx_ni(struct sk_buff *skb);
1685 #define HAVE_NETIF_RECEIVE_SKB 1
1686 extern int netif_receive_skb(struct sk_buff *skb);
1687 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1688 struct sk_buff *skb);
1689 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1690 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1691 struct sk_buff *skb);
1692 extern void napi_reuse_skb(struct napi_struct *napi,
1693 struct sk_buff *skb);
1694 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1695 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1696 struct sk_buff *skb,
1698 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1699 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1701 static inline void napi_free_frags(struct napi_struct *napi)
1703 kfree_skb(napi->skb);
1707 extern int netdev_rx_handler_register(struct net_device *dev,
1708 rx_handler_func_t *rx_handler,
1709 void *rx_handler_data);
1710 extern void netdev_rx_handler_unregister(struct net_device *dev);
1712 extern void netif_nit_deliver(struct sk_buff *skb);
1713 extern int dev_valid_name(const char *name);
1714 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1715 extern int dev_ethtool(struct net *net, struct ifreq *);
1716 extern unsigned dev_get_flags(const struct net_device *);
1717 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1718 extern int dev_change_flags(struct net_device *, unsigned);
1719 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1720 extern int dev_change_name(struct net_device *, const char *);
1721 extern int dev_set_alias(struct net_device *, const char *, size_t);
1722 extern int dev_change_net_namespace(struct net_device *,
1723 struct net *, const char *);
1724 extern int dev_set_mtu(struct net_device *, int);
1725 extern int dev_set_mac_address(struct net_device *,
1727 extern int dev_hard_start_xmit(struct sk_buff *skb,
1728 struct net_device *dev,
1729 struct netdev_queue *txq);
1730 extern int dev_forward_skb(struct net_device *dev,
1731 struct sk_buff *skb);
1733 extern int netdev_budget;
1735 /* Called by rtnetlink.c:rtnl_unlock() */
1736 extern void netdev_run_todo(void);
1739 * dev_put - release reference to device
1740 * @dev: network device
1742 * Release reference to device to allow it to be freed.
1744 static inline void dev_put(struct net_device *dev)
1746 atomic_dec(&dev->refcnt);
1750 * dev_hold - get reference to device
1751 * @dev: network device
1753 * Hold reference to device to keep it from being freed.
1755 static inline void dev_hold(struct net_device *dev)
1757 atomic_inc(&dev->refcnt);
1760 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1761 * and _off may be called from IRQ context, but it is caller
1762 * who is responsible for serialization of these calls.
1764 * The name carrier is inappropriate, these functions should really be
1765 * called netif_lowerlayer_*() because they represent the state of any
1766 * kind of lower layer not just hardware media.
1769 extern void linkwatch_fire_event(struct net_device *dev);
1770 extern void linkwatch_forget_dev(struct net_device *dev);
1773 * netif_carrier_ok - test if carrier present
1774 * @dev: network device
1776 * Check if carrier is present on device
1778 static inline int netif_carrier_ok(const struct net_device *dev)
1780 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1783 extern unsigned long dev_trans_start(struct net_device *dev);
1785 extern void __netdev_watchdog_up(struct net_device *dev);
1787 extern void netif_carrier_on(struct net_device *dev);
1789 extern void netif_carrier_off(struct net_device *dev);
1791 extern void netif_notify_peers(struct net_device *dev);
1794 * netif_dormant_on - mark device as dormant.
1795 * @dev: network device
1797 * Mark device as dormant (as per RFC2863).
1799 * The dormant state indicates that the relevant interface is not
1800 * actually in a condition to pass packets (i.e., it is not 'up') but is
1801 * in a "pending" state, waiting for some external event. For "on-
1802 * demand" interfaces, this new state identifies the situation where the
1803 * interface is waiting for events to place it in the up state.
1806 static inline void netif_dormant_on(struct net_device *dev)
1808 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1809 linkwatch_fire_event(dev);
1813 * netif_dormant_off - set device as not dormant.
1814 * @dev: network device
1816 * Device is not in dormant state.
1818 static inline void netif_dormant_off(struct net_device *dev)
1820 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1821 linkwatch_fire_event(dev);
1825 * netif_dormant - test if carrier present
1826 * @dev: network device
1828 * Check if carrier is present on device
1830 static inline int netif_dormant(const struct net_device *dev)
1832 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1837 * netif_oper_up - test if device is operational
1838 * @dev: network device
1840 * Check if carrier is operational
1842 static inline int netif_oper_up(const struct net_device *dev)
1844 return (dev->operstate == IF_OPER_UP ||
1845 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1849 * netif_device_present - is device available or removed
1850 * @dev: network device
1852 * Check if device has not been removed from system.
1854 static inline int netif_device_present(struct net_device *dev)
1856 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1859 extern void netif_device_detach(struct net_device *dev);
1861 extern void netif_device_attach(struct net_device *dev);
1864 * Network interface message level settings
1866 #define HAVE_NETIF_MSG 1
1869 NETIF_MSG_DRV = 0x0001,
1870 NETIF_MSG_PROBE = 0x0002,
1871 NETIF_MSG_LINK = 0x0004,
1872 NETIF_MSG_TIMER = 0x0008,
1873 NETIF_MSG_IFDOWN = 0x0010,
1874 NETIF_MSG_IFUP = 0x0020,
1875 NETIF_MSG_RX_ERR = 0x0040,
1876 NETIF_MSG_TX_ERR = 0x0080,
1877 NETIF_MSG_TX_QUEUED = 0x0100,
1878 NETIF_MSG_INTR = 0x0200,
1879 NETIF_MSG_TX_DONE = 0x0400,
1880 NETIF_MSG_RX_STATUS = 0x0800,
1881 NETIF_MSG_PKTDATA = 0x1000,
1882 NETIF_MSG_HW = 0x2000,
1883 NETIF_MSG_WOL = 0x4000,
1886 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1887 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1888 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1889 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1890 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1891 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1892 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1893 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1894 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1895 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1896 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1897 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1898 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1899 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1900 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1902 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1905 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1906 return default_msg_enable_bits;
1907 if (debug_value == 0) /* no output */
1909 /* set low N bits */
1910 return (1 << debug_value) - 1;
1913 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1915 spin_lock(&txq->_xmit_lock);
1916 txq->xmit_lock_owner = cpu;
1919 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1921 spin_lock_bh(&txq->_xmit_lock);
1922 txq->xmit_lock_owner = smp_processor_id();
1925 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1927 int ok = spin_trylock(&txq->_xmit_lock);
1929 txq->xmit_lock_owner = smp_processor_id();
1933 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1935 txq->xmit_lock_owner = -1;
1936 spin_unlock(&txq->_xmit_lock);
1939 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1941 txq->xmit_lock_owner = -1;
1942 spin_unlock_bh(&txq->_xmit_lock);
1945 static inline void txq_trans_update(struct netdev_queue *txq)
1947 if (txq->xmit_lock_owner != -1)
1948 txq->trans_start = jiffies;
1952 * netif_tx_lock - grab network device transmit lock
1953 * @dev: network device
1955 * Get network device transmit lock
1957 static inline void netif_tx_lock(struct net_device *dev)
1962 spin_lock(&dev->tx_global_lock);
1963 cpu = smp_processor_id();
1964 for (i = 0; i < dev->num_tx_queues; i++) {
1965 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1967 /* We are the only thread of execution doing a
1968 * freeze, but we have to grab the _xmit_lock in
1969 * order to synchronize with threads which are in
1970 * the ->hard_start_xmit() handler and already
1971 * checked the frozen bit.
1973 __netif_tx_lock(txq, cpu);
1974 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1975 __netif_tx_unlock(txq);
1979 static inline void netif_tx_lock_bh(struct net_device *dev)
1985 static inline void netif_tx_unlock(struct net_device *dev)
1989 for (i = 0; i < dev->num_tx_queues; i++) {
1990 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1992 /* No need to grab the _xmit_lock here. If the
1993 * queue is not stopped for another reason, we
1996 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1997 netif_schedule_queue(txq);
1999 spin_unlock(&dev->tx_global_lock);
2002 static inline void netif_tx_unlock_bh(struct net_device *dev)
2004 netif_tx_unlock(dev);
2008 #define HARD_TX_LOCK(dev, txq, cpu) { \
2009 if ((dev->features & NETIF_F_LLTX) == 0) { \
2010 __netif_tx_lock(txq, cpu); \
2014 #define HARD_TX_UNLOCK(dev, txq) { \
2015 if ((dev->features & NETIF_F_LLTX) == 0) { \
2016 __netif_tx_unlock(txq); \
2020 static inline void netif_tx_disable(struct net_device *dev)
2026 cpu = smp_processor_id();
2027 for (i = 0; i < dev->num_tx_queues; i++) {
2028 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2030 __netif_tx_lock(txq, cpu);
2031 netif_tx_stop_queue(txq);
2032 __netif_tx_unlock(txq);
2037 static inline void netif_addr_lock(struct net_device *dev)
2039 spin_lock(&dev->addr_list_lock);
2042 static inline void netif_addr_lock_bh(struct net_device *dev)
2044 spin_lock_bh(&dev->addr_list_lock);
2047 static inline void netif_addr_unlock(struct net_device *dev)
2049 spin_unlock(&dev->addr_list_lock);
2052 static inline void netif_addr_unlock_bh(struct net_device *dev)
2054 spin_unlock_bh(&dev->addr_list_lock);
2058 * dev_addrs walker. Should be used only for read access. Call with
2059 * rcu_read_lock held.
2061 #define for_each_dev_addr(dev, ha) \
2062 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2064 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2066 extern void ether_setup(struct net_device *dev);
2068 /* Support for loadable net-drivers */
2069 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
2070 void (*setup)(struct net_device *),
2071 unsigned int queue_count);
2072 #define alloc_netdev(sizeof_priv, name, setup) \
2073 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2074 extern int register_netdev(struct net_device *dev);
2075 extern void unregister_netdev(struct net_device *dev);
2077 /* General hardware address lists handling functions */
2078 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2079 struct netdev_hw_addr_list *from_list,
2080 int addr_len, unsigned char addr_type);
2081 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2082 struct netdev_hw_addr_list *from_list,
2083 int addr_len, unsigned char addr_type);
2084 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2085 struct netdev_hw_addr_list *from_list,
2087 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2088 struct netdev_hw_addr_list *from_list,
2090 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2091 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2093 /* Functions used for device addresses handling */
2094 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2095 unsigned char addr_type);
2096 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2097 unsigned char addr_type);
2098 extern int dev_addr_add_multiple(struct net_device *to_dev,
2099 struct net_device *from_dev,
2100 unsigned char addr_type);
2101 extern int dev_addr_del_multiple(struct net_device *to_dev,
2102 struct net_device *from_dev,
2103 unsigned char addr_type);
2104 extern void dev_addr_flush(struct net_device *dev);
2105 extern int dev_addr_init(struct net_device *dev);
2107 /* Functions used for unicast addresses handling */
2108 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2109 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2110 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2111 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2112 extern void dev_uc_flush(struct net_device *dev);
2113 extern void dev_uc_init(struct net_device *dev);
2115 /* Functions used for multicast addresses handling */
2116 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2117 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2118 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2119 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2120 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2121 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2122 extern void dev_mc_flush(struct net_device *dev);
2123 extern void dev_mc_init(struct net_device *dev);
2125 /* Functions used for secondary unicast and multicast support */
2126 extern void dev_set_rx_mode(struct net_device *dev);
2127 extern void __dev_set_rx_mode(struct net_device *dev);
2128 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2129 extern int dev_set_allmulti(struct net_device *dev, int inc);
2130 extern void netdev_state_change(struct net_device *dev);
2131 extern int netdev_bonding_change(struct net_device *dev,
2132 unsigned long event);
2133 extern void netdev_features_change(struct net_device *dev);
2134 /* Load a device via the kmod */
2135 extern void dev_load(struct net *net, const char *name);
2136 extern void dev_mcast_init(void);
2137 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2138 struct rtnl_link_stats64 *storage);
2139 extern void dev_txq_stats_fold(const struct net_device *dev,
2140 struct rtnl_link_stats64 *stats);
2142 extern int netdev_max_backlog;
2143 extern int netdev_tstamp_prequeue;
2144 extern int weight_p;
2145 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2146 extern int skb_checksum_help(struct sk_buff *skb);
2147 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2149 extern void netdev_rx_csum_fault(struct net_device *dev);
2151 static inline void netdev_rx_csum_fault(struct net_device *dev)
2155 /* rx skb timestamps */
2156 extern void net_enable_timestamp(void);
2157 extern void net_disable_timestamp(void);
2159 #ifdef CONFIG_PROC_FS
2160 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2161 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2162 extern void dev_seq_stop(struct seq_file *seq, void *v);
2165 extern int netdev_class_create_file(struct class_attribute *class_attr);
2166 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2168 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2170 extern void linkwatch_run_queue(void);
2172 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2173 unsigned long mask);
2174 unsigned long netdev_fix_features(unsigned long features, const char *name);
2176 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2177 struct net_device *dev);
2179 static inline int net_gso_ok(int features, int gso_type)
2181 int feature = gso_type << NETIF_F_GSO_SHIFT;
2182 return (features & feature) == feature;
2185 static inline int skb_gso_ok(struct sk_buff *skb, int features)
2187 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2188 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
2191 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2193 return skb_is_gso(skb) &&
2194 (!skb_gso_ok(skb, dev->features) ||
2195 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2198 static inline void netif_set_gso_max_size(struct net_device *dev,
2201 dev->gso_max_size = size;
2204 extern int __skb_bond_should_drop(struct sk_buff *skb,
2205 struct net_device *master);
2207 static inline int skb_bond_should_drop(struct sk_buff *skb,
2208 struct net_device *master)
2211 return __skb_bond_should_drop(skb, master);
2215 extern struct pernet_operations __net_initdata loopback_net_ops;
2217 static inline int dev_ethtool_get_settings(struct net_device *dev,
2218 struct ethtool_cmd *cmd)
2220 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2222 return dev->ethtool_ops->get_settings(dev, cmd);
2225 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2227 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2229 return dev->ethtool_ops->get_rx_csum(dev);
2232 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2234 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2236 return dev->ethtool_ops->get_flags(dev);
2239 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2241 /* netdev_printk helpers, similar to dev_printk */
2243 static inline const char *netdev_name(const struct net_device *dev)
2245 if (dev->reg_state != NETREG_REGISTERED)
2246 return "(unregistered net_device)";
2250 extern int netdev_printk(const char *level, const struct net_device *dev,
2251 const char *format, ...)
2252 __attribute__ ((format (printf, 3, 4)));
2253 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2254 __attribute__ ((format (printf, 2, 3)));
2255 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2256 __attribute__ ((format (printf, 2, 3)));
2257 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2258 __attribute__ ((format (printf, 2, 3)));
2259 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2260 __attribute__ ((format (printf, 2, 3)));
2261 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2262 __attribute__ ((format (printf, 2, 3)));
2263 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2264 __attribute__ ((format (printf, 2, 3)));
2265 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2266 __attribute__ ((format (printf, 2, 3)));
2269 #define netdev_dbg(__dev, format, args...) \
2270 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2271 #elif defined(CONFIG_DYNAMIC_DEBUG)
2272 #define netdev_dbg(__dev, format, args...) \
2274 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2275 netdev_name(__dev), ##args); \
2278 #define netdev_dbg(__dev, format, args...) \
2281 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2286 #if defined(VERBOSE_DEBUG)
2287 #define netdev_vdbg netdev_dbg
2290 #define netdev_vdbg(dev, format, args...) \
2293 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2299 * netdev_WARN() acts like dev_printk(), but with the key difference
2300 * of using a WARN/WARN_ON to get the message out, including the
2301 * file/line information and a backtrace.
2303 #define netdev_WARN(dev, format, args...) \
2304 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2306 /* netif printk helpers, similar to netdev_printk */
2308 #define netif_printk(priv, type, level, dev, fmt, args...) \
2310 if (netif_msg_##type(priv)) \
2311 netdev_printk(level, (dev), fmt, ##args); \
2314 #define netif_level(level, priv, type, dev, fmt, args...) \
2316 if (netif_msg_##type(priv)) \
2317 netdev_##level(dev, fmt, ##args); \
2320 #define netif_emerg(priv, type, dev, fmt, args...) \
2321 netif_level(emerg, priv, type, dev, fmt, ##args)
2322 #define netif_alert(priv, type, dev, fmt, args...) \
2323 netif_level(alert, priv, type, dev, fmt, ##args)
2324 #define netif_crit(priv, type, dev, fmt, args...) \
2325 netif_level(crit, priv, type, dev, fmt, ##args)
2326 #define netif_err(priv, type, dev, fmt, args...) \
2327 netif_level(err, priv, type, dev, fmt, ##args)
2328 #define netif_warn(priv, type, dev, fmt, args...) \
2329 netif_level(warn, priv, type, dev, fmt, ##args)
2330 #define netif_notice(priv, type, dev, fmt, args...) \
2331 netif_level(notice, priv, type, dev, fmt, ##args)
2332 #define netif_info(priv, type, dev, fmt, args...) \
2333 netif_level(info, priv, type, 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 netif_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 */