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 /* hardware address assignment types */
70 #define NET_ADDR_PERM 0 /* address is permanent (default) */
71 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
72 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
74 /* Backlog congestion levels */
75 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
76 #define NET_RX_DROP 1 /* packet dropped */
79 * Transmit return codes: transmit return codes originate from three different
82 * - qdisc return codes
83 * - driver transmit return codes
86 * Drivers are allowed to return any one of those in their hard_start_xmit()
87 * function. Real network devices commonly used with qdiscs should only return
88 * the driver transmit return codes though - when qdiscs are used, the actual
89 * transmission happens asynchronously, so the value is not propagated to
90 * higher layers. Virtual network devices transmit synchronously, in this case
91 * the driver transmit return codes are consumed by dev_queue_xmit(), all
92 * others are propagated to higher layers.
95 /* qdisc ->enqueue() return codes. */
96 #define NET_XMIT_SUCCESS 0x00
97 #define NET_XMIT_DROP 0x01 /* skb dropped */
98 #define NET_XMIT_CN 0x02 /* congestion notification */
99 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
100 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
102 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
103 * indicates that the device will soon be dropping packets, or already drops
104 * some packets of the same priority; prompting us to send less aggressively. */
105 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
106 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
108 /* Driver transmit return codes */
109 #define NETDEV_TX_MASK 0xf0
112 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
113 NETDEV_TX_OK = 0x00, /* driver took care of packet */
114 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
115 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
117 typedef enum netdev_tx netdev_tx_t;
120 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
121 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
123 static inline bool dev_xmit_complete(int rc)
126 * Positive cases with an skb consumed by a driver:
127 * - successful transmission (rc == NETDEV_TX_OK)
128 * - error while transmitting (rc < 0)
129 * - error while queueing to a different device (rc & NET_XMIT_MASK)
131 if (likely(rc < NET_XMIT_MASK))
139 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
143 * Compute the worst case header length according to the protocols
147 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
148 # if defined(CONFIG_MAC80211_MESH)
149 # define LL_MAX_HEADER 128
151 # define LL_MAX_HEADER 96
153 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
154 # define LL_MAX_HEADER 48
156 # define LL_MAX_HEADER 32
159 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
160 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
161 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
162 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
163 #define MAX_HEADER LL_MAX_HEADER
165 #define MAX_HEADER (LL_MAX_HEADER + 48)
169 * Old network device statistics. Fields are native words
170 * (unsigned long) so they can be read and written atomically.
173 struct net_device_stats {
174 unsigned long rx_packets;
175 unsigned long tx_packets;
176 unsigned long rx_bytes;
177 unsigned long tx_bytes;
178 unsigned long rx_errors;
179 unsigned long tx_errors;
180 unsigned long rx_dropped;
181 unsigned long tx_dropped;
182 unsigned long multicast;
183 unsigned long collisions;
184 unsigned long rx_length_errors;
185 unsigned long rx_over_errors;
186 unsigned long rx_crc_errors;
187 unsigned long rx_frame_errors;
188 unsigned long rx_fifo_errors;
189 unsigned long rx_missed_errors;
190 unsigned long tx_aborted_errors;
191 unsigned long tx_carrier_errors;
192 unsigned long tx_fifo_errors;
193 unsigned long tx_heartbeat_errors;
194 unsigned long tx_window_errors;
195 unsigned long rx_compressed;
196 unsigned long tx_compressed;
199 #endif /* __KERNEL__ */
202 /* Media selection options. */
215 #include <linux/cache.h>
216 #include <linux/skbuff.h>
222 struct netdev_hw_addr {
223 struct list_head list;
224 unsigned char addr[MAX_ADDR_LEN];
226 #define NETDEV_HW_ADDR_T_LAN 1
227 #define NETDEV_HW_ADDR_T_SAN 2
228 #define NETDEV_HW_ADDR_T_SLAVE 3
229 #define NETDEV_HW_ADDR_T_UNICAST 4
230 #define NETDEV_HW_ADDR_T_MULTICAST 5
234 struct rcu_head rcu_head;
237 struct netdev_hw_addr_list {
238 struct list_head list;
242 #define netdev_hw_addr_list_count(l) ((l)->count)
243 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
244 #define netdev_hw_addr_list_for_each(ha, l) \
245 list_for_each_entry(ha, &(l)->list, list)
247 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
248 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
249 #define netdev_for_each_uc_addr(ha, dev) \
250 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
252 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
253 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
254 #define netdev_for_each_mc_addr(ha, dev) \
255 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
258 struct hh_cache *hh_next; /* Next entry */
259 atomic_t hh_refcnt; /* number of users */
261 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
263 * They are mostly read, but hh_refcnt may be changed quite frequently,
264 * incurring cache line ping pongs.
266 __be16 hh_type ____cacheline_aligned_in_smp;
267 /* protocol identifier, f.e ETH_P_IP
268 * NOTE: For VLANs, this will be the
269 * encapuslated type. --BLG
271 u16 hh_len; /* length of header */
272 int (*hh_output)(struct sk_buff *skb);
275 /* cached hardware header; allow for machine alignment needs. */
276 #define HH_DATA_MOD 16
277 #define HH_DATA_OFF(__len) \
278 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
279 #define HH_DATA_ALIGN(__len) \
280 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
281 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
284 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
286 * dev->hard_header_len ? (dev->hard_header_len +
287 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
289 * We could use other alignment values, but we must maintain the
290 * relationship HH alignment <= LL alignment.
292 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
295 #define LL_RESERVED_SPACE(dev) \
296 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
297 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
298 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
299 #define LL_ALLOCATED_SPACE(dev) \
300 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
303 int (*create) (struct sk_buff *skb, struct net_device *dev,
304 unsigned short type, const void *daddr,
305 const void *saddr, unsigned len);
306 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
307 int (*rebuild)(struct sk_buff *skb);
308 #define HAVE_HEADER_CACHE
309 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
310 void (*cache_update)(struct hh_cache *hh,
311 const struct net_device *dev,
312 const unsigned char *haddr);
315 /* These flag bits are private to the generic network queueing
316 * layer, they may not be explicitly referenced by any other
320 enum netdev_state_t {
322 __LINK_STATE_PRESENT,
323 __LINK_STATE_NOCARRIER,
324 __LINK_STATE_LINKWATCH_PENDING,
325 __LINK_STATE_DORMANT,
330 * This structure holds at boot time configured netdevice settings. They
331 * are then used in the device probing.
333 struct netdev_boot_setup {
337 #define NETDEV_BOOT_SETUP_MAX 8
339 extern int __init netdev_boot_setup(char *str);
342 * Structure for NAPI scheduling similar to tasklet but with weighting
345 /* The poll_list must only be managed by the entity which
346 * changes the state of the NAPI_STATE_SCHED bit. This means
347 * whoever atomically sets that bit can add this napi_struct
348 * to the per-cpu poll_list, and whoever clears that bit
349 * can remove from the list right before clearing the bit.
351 struct list_head poll_list;
355 int (*poll)(struct napi_struct *, int);
356 #ifdef CONFIG_NETPOLL
357 spinlock_t poll_lock;
361 unsigned int gro_count;
363 struct net_device *dev;
364 struct list_head dev_list;
365 struct sk_buff *gro_list;
370 NAPI_STATE_SCHED, /* Poll is scheduled */
371 NAPI_STATE_DISABLE, /* Disable pending */
372 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
382 typedef enum gro_result gro_result_t;
384 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
386 extern void __napi_schedule(struct napi_struct *n);
388 static inline int napi_disable_pending(struct napi_struct *n)
390 return test_bit(NAPI_STATE_DISABLE, &n->state);
394 * napi_schedule_prep - check if napi can be scheduled
397 * Test if NAPI routine is already running, and if not mark
398 * it as running. This is used as a condition variable
399 * insure only one NAPI poll instance runs. We also make
400 * sure there is no pending NAPI disable.
402 static inline int napi_schedule_prep(struct napi_struct *n)
404 return !napi_disable_pending(n) &&
405 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
409 * napi_schedule - schedule NAPI poll
412 * Schedule NAPI poll routine to be called if it is not already
415 static inline void napi_schedule(struct napi_struct *n)
417 if (napi_schedule_prep(n))
421 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
422 static inline int napi_reschedule(struct napi_struct *napi)
424 if (napi_schedule_prep(napi)) {
425 __napi_schedule(napi);
432 * napi_complete - NAPI processing complete
435 * Mark NAPI processing as complete.
437 extern void __napi_complete(struct napi_struct *n);
438 extern void napi_complete(struct napi_struct *n);
441 * napi_disable - prevent NAPI from scheduling
444 * Stop NAPI from being scheduled on this context.
445 * Waits till any outstanding processing completes.
447 static inline void napi_disable(struct napi_struct *n)
449 set_bit(NAPI_STATE_DISABLE, &n->state);
450 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
452 clear_bit(NAPI_STATE_DISABLE, &n->state);
456 * napi_enable - enable NAPI scheduling
459 * Resume NAPI from being scheduled on this context.
460 * Must be paired with napi_disable.
462 static inline void napi_enable(struct napi_struct *n)
464 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
465 smp_mb__before_clear_bit();
466 clear_bit(NAPI_STATE_SCHED, &n->state);
471 * napi_synchronize - wait until NAPI is not running
474 * Wait until NAPI is done being scheduled on this context.
475 * Waits till any outstanding processing completes but
476 * does not disable future activations.
478 static inline void napi_synchronize(const struct napi_struct *n)
480 while (test_bit(NAPI_STATE_SCHED, &n->state))
484 # define napi_synchronize(n) barrier()
487 enum netdev_queue_state_t {
489 __QUEUE_STATE_FROZEN,
492 struct netdev_queue {
496 struct net_device *dev;
499 struct Qdisc *qdisc_sleeping;
503 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
506 * please use this field instead of dev->trans_start
508 unsigned long trans_start;
512 } ____cacheline_aligned_in_smp;
516 * This structure holds an RPS map which can be of variable length. The
517 * map is an array of CPUs.
524 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
527 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
528 * tail pointer for that CPU's input queue at the time of last enqueue.
530 struct rps_dev_flow {
533 unsigned int last_qtail;
537 * The rps_dev_flow_table structure contains a table of flow mappings.
539 struct rps_dev_flow_table {
542 struct work_struct free_work;
543 struct rps_dev_flow flows[0];
545 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
546 (_num * sizeof(struct rps_dev_flow)))
549 * The rps_sock_flow_table contains mappings of flows to the last CPU
550 * on which they were processed by the application (set in recvmsg).
552 struct rps_sock_flow_table {
556 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
557 (_num * sizeof(u16)))
559 #define RPS_NO_CPU 0xffff
561 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
565 unsigned int cpu, index = hash & table->mask;
567 /* We only give a hint, preemption can change cpu under us */
568 cpu = raw_smp_processor_id();
570 if (table->ents[index] != cpu)
571 table->ents[index] = cpu;
575 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
579 table->ents[hash & table->mask] = RPS_NO_CPU;
582 extern struct rps_sock_flow_table *rps_sock_flow_table;
584 /* This structure contains an instance of an RX queue. */
585 struct netdev_rx_queue {
586 struct rps_map *rps_map;
587 struct rps_dev_flow_table *rps_flow_table;
589 struct netdev_rx_queue *first;
591 } ____cacheline_aligned_in_smp;
592 #endif /* CONFIG_RPS */
595 * This structure defines the management hooks for network devices.
596 * The following hooks can be defined; unless noted otherwise, they are
597 * optional and can be filled with a null pointer.
599 * int (*ndo_init)(struct net_device *dev);
600 * This function is called once when network device is registered.
601 * The network device can use this to any late stage initializaton
602 * or semantic validattion. It can fail with an error code which will
603 * be propogated back to register_netdev
605 * void (*ndo_uninit)(struct net_device *dev);
606 * This function is called when device is unregistered or when registration
607 * fails. It is not called if init fails.
609 * int (*ndo_open)(struct net_device *dev);
610 * This function is called when network device transistions to the up
613 * int (*ndo_stop)(struct net_device *dev);
614 * This function is called when network device transistions to the down
617 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
618 * struct net_device *dev);
619 * Called when a packet needs to be transmitted.
620 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
621 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
622 * Required can not be NULL.
624 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
625 * Called to decide which queue to when device supports multiple
628 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
629 * This function is called to allow device receiver to make
630 * changes to configuration when multicast or promiscious is enabled.
632 * void (*ndo_set_rx_mode)(struct net_device *dev);
633 * This function is called device changes address list filtering.
635 * void (*ndo_set_multicast_list)(struct net_device *dev);
636 * This function is called when the multicast address list changes.
638 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
639 * This function is called when the Media Access Control address
640 * needs to be changed. If this interface is not defined, the
641 * mac address can not be changed.
643 * int (*ndo_validate_addr)(struct net_device *dev);
644 * Test if Media Access Control address is valid for the device.
646 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
647 * Called when a user request an ioctl which can't be handled by
648 * the generic interface code. If not defined ioctl's return
649 * not supported error code.
651 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
652 * Used to set network devices bus interface parameters. This interface
653 * is retained for legacy reason, new devices should use the bus
654 * interface (PCI) for low level management.
656 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
657 * Called when a user wants to change the Maximum Transfer Unit
658 * of a device. If not defined, any request to change MTU will
659 * will return an error.
661 * void (*ndo_tx_timeout)(struct net_device *dev);
662 * Callback uses when the transmitter has not made any progress
663 * for dev->watchdog ticks.
665 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
666 * struct rtnl_link_stats64 *storage);
667 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
668 * Called when a user wants to get the network device usage
669 * statistics. Drivers must do one of the following:
670 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
671 * rtnl_link_stats64 structure passed by the caller.
672 * 2. Define @ndo_get_stats to update a net_device_stats structure
673 * (which should normally be dev->stats) and return a pointer to
674 * it. The structure may be changed asynchronously only if each
675 * field is written atomically.
676 * 3. Update dev->stats asynchronously and atomically, and define
679 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
680 * If device support VLAN receive accleration
681 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
682 * when vlan groups for the device changes. Note: grp is NULL
683 * if no vlan's groups are being used.
685 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
686 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
687 * this function is called when a VLAN id is registered.
689 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
690 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
691 * this function is called when a VLAN id is unregistered.
693 * void (*ndo_poll_controller)(struct net_device *dev);
695 * SR-IOV management functions.
696 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
697 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
698 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
699 * int (*ndo_get_vf_config)(struct net_device *dev,
700 * int vf, struct ifla_vf_info *ivf);
701 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
702 * struct nlattr *port[]);
703 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
705 #define HAVE_NET_DEVICE_OPS
706 struct net_device_ops {
707 int (*ndo_init)(struct net_device *dev);
708 void (*ndo_uninit)(struct net_device *dev);
709 int (*ndo_open)(struct net_device *dev);
710 int (*ndo_stop)(struct net_device *dev);
711 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
712 struct net_device *dev);
713 u16 (*ndo_select_queue)(struct net_device *dev,
714 struct sk_buff *skb);
715 void (*ndo_change_rx_flags)(struct net_device *dev,
717 void (*ndo_set_rx_mode)(struct net_device *dev);
718 void (*ndo_set_multicast_list)(struct net_device *dev);
719 int (*ndo_set_mac_address)(struct net_device *dev,
721 int (*ndo_validate_addr)(struct net_device *dev);
722 int (*ndo_do_ioctl)(struct net_device *dev,
723 struct ifreq *ifr, int cmd);
724 int (*ndo_set_config)(struct net_device *dev,
726 int (*ndo_change_mtu)(struct net_device *dev,
728 int (*ndo_neigh_setup)(struct net_device *dev,
729 struct neigh_parms *);
730 void (*ndo_tx_timeout) (struct net_device *dev);
732 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
733 struct rtnl_link_stats64 *storage);
734 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
736 void (*ndo_vlan_rx_register)(struct net_device *dev,
737 struct vlan_group *grp);
738 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
740 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
742 #ifdef CONFIG_NET_POLL_CONTROLLER
743 void (*ndo_poll_controller)(struct net_device *dev);
744 int (*ndo_netpoll_setup)(struct net_device *dev,
745 struct netpoll_info *info);
746 void (*ndo_netpoll_cleanup)(struct net_device *dev);
748 int (*ndo_set_vf_mac)(struct net_device *dev,
750 int (*ndo_set_vf_vlan)(struct net_device *dev,
751 int queue, u16 vlan, u8 qos);
752 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
754 int (*ndo_get_vf_config)(struct net_device *dev,
756 struct ifla_vf_info *ivf);
757 int (*ndo_set_vf_port)(struct net_device *dev,
759 struct nlattr *port[]);
760 int (*ndo_get_vf_port)(struct net_device *dev,
761 int vf, struct sk_buff *skb);
762 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
763 int (*ndo_fcoe_enable)(struct net_device *dev);
764 int (*ndo_fcoe_disable)(struct net_device *dev);
765 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
767 struct scatterlist *sgl,
769 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
771 #define NETDEV_FCOE_WWNN 0
772 #define NETDEV_FCOE_WWPN 1
773 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
779 * The DEVICE structure.
780 * Actually, this whole structure is a big mistake. It mixes I/O
781 * data with strictly "high-level" data, and it has to know about
782 * almost every data structure used in the INET module.
784 * FIXME: cleanup struct net_device such that network protocol info
791 * This is the first field of the "visible" part of this structure
792 * (i.e. as seen by users in the "Space.c" file). It is the name
797 struct pm_qos_request_list pm_qos_req;
799 /* device name hash chain */
800 struct hlist_node name_hlist;
805 * I/O specific fields
806 * FIXME: Merge these and struct ifmap into one
808 unsigned long mem_end; /* shared mem end */
809 unsigned long mem_start; /* shared mem start */
810 unsigned long base_addr; /* device I/O address */
811 unsigned int irq; /* device IRQ number */
814 * Some hardware also needs these fields, but they are not
815 * part of the usual set specified in Space.c.
818 unsigned char if_port; /* Selectable AUI, TP,..*/
819 unsigned char dma; /* DMA channel */
823 struct list_head dev_list;
824 struct list_head napi_list;
825 struct list_head unreg_list;
827 /* Net device features */
828 unsigned long features;
829 #define NETIF_F_SG 1 /* Scatter/gather IO. */
830 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
831 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
832 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
833 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
834 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
835 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
836 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
837 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
838 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
839 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
840 #define NETIF_F_GSO 2048 /* Enable software GSO. */
841 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
842 /* do not use LLTX in new drivers */
843 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
844 #define NETIF_F_GRO 16384 /* Generic receive offload */
845 #define NETIF_F_LRO 32768 /* large receive offload */
847 /* the GSO_MASK reserves bits 16 through 23 */
848 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
849 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
850 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
851 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
852 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
854 /* Segmentation offload features */
855 #define NETIF_F_GSO_SHIFT 16
856 #define NETIF_F_GSO_MASK 0x00ff0000
857 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
858 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
859 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
860 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
861 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
862 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
864 /* List of features with software fallbacks. */
865 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
866 NETIF_F_TSO6 | NETIF_F_UFO)
869 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
870 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
871 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
872 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
875 * If one device supports one of these features, then enable them
876 * for all in netdev_increment_features.
878 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
879 NETIF_F_SG | NETIF_F_HIGHDMA | \
882 /* Interface index. Unique device identifier */
886 struct net_device_stats stats;
888 #ifdef CONFIG_WIRELESS_EXT
889 /* List of functions to handle Wireless Extensions (instead of ioctl).
890 * See <net/iw_handler.h> for details. Jean II */
891 const struct iw_handler_def * wireless_handlers;
892 /* Instance data managed by the core of Wireless Extensions. */
893 struct iw_public_data * wireless_data;
895 /* Management operations */
896 const struct net_device_ops *netdev_ops;
897 const struct ethtool_ops *ethtool_ops;
899 /* Hardware header description */
900 const struct header_ops *header_ops;
902 unsigned int flags; /* interface flags (a la BSD) */
903 unsigned short gflags;
904 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
905 unsigned short padded; /* How much padding added by alloc_netdev() */
907 unsigned char operstate; /* RFC2863 operstate */
908 unsigned char link_mode; /* mapping policy to operstate */
910 unsigned int mtu; /* interface MTU value */
911 unsigned short type; /* interface hardware type */
912 unsigned short hard_header_len; /* hardware hdr length */
914 /* extra head- and tailroom the hardware may need, but not in all cases
915 * can this be guaranteed, especially tailroom. Some cases also use
916 * LL_MAX_HEADER instead to allocate the skb.
918 unsigned short needed_headroom;
919 unsigned short needed_tailroom;
921 /* Interface address info. */
922 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
923 unsigned char addr_assign_type; /* hw address assignment type */
924 unsigned char addr_len; /* hardware address length */
925 unsigned short dev_id; /* for shared network cards */
927 spinlock_t addr_list_lock;
928 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
929 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
931 unsigned int promiscuity;
932 unsigned int allmulti;
935 /* Protocol specific pointers */
937 #ifdef CONFIG_NET_DSA
938 void *dsa_ptr; /* dsa specific data */
940 void *atalk_ptr; /* AppleTalk link */
941 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
942 void *dn_ptr; /* DECnet specific data */
943 void *ip6_ptr; /* IPv6 specific data */
944 void *ec_ptr; /* Econet specific data */
945 void *ax25_ptr; /* AX.25 specific data */
946 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
947 assign before registering */
950 * Cache lines mostly used on receive path (including eth_type_trans())
952 unsigned long last_rx; /* Time of last Rx
953 * This should not be set in
954 * drivers, unless really needed,
955 * because network stack (bonding)
956 * use it if/when necessary, to
957 * avoid dirtying this cache line.
960 struct net_device *master; /* Pointer to master device of a group,
961 * which this device is member of.
964 /* Interface address info used in eth_type_trans() */
965 unsigned char *dev_addr; /* hw address, (before bcast
966 because most packets are
969 struct netdev_hw_addr_list dev_addrs; /* list of device
972 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
975 struct kset *queues_kset;
977 struct netdev_rx_queue *_rx;
979 /* Number of RX queues allocated at alloc_netdev_mq() time */
980 unsigned int num_rx_queues;
983 rx_handler_func_t *rx_handler;
984 void *rx_handler_data;
986 struct netdev_queue rx_queue; /* use two cache lines */
989 * Cache lines mostly used on transmit path
991 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
993 /* Number of TX queues allocated at alloc_netdev_mq() time */
994 unsigned int num_tx_queues;
996 /* Number of TX queues currently active in device */
997 unsigned int real_num_tx_queues;
999 /* root qdisc from userspace point of view */
1000 struct Qdisc *qdisc;
1002 unsigned long tx_queue_len; /* Max frames per queue allowed */
1003 spinlock_t tx_global_lock;
1005 /* These may be needed for future network-power-down code. */
1008 * trans_start here is expensive for high speed devices on SMP,
1009 * please use netdev_queue->trans_start instead.
1011 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1013 int watchdog_timeo; /* used by dev_watchdog() */
1014 struct timer_list watchdog_timer;
1016 /* Number of references to this device */
1017 atomic_t refcnt ____cacheline_aligned_in_smp;
1019 /* delayed register/unregister */
1020 struct list_head todo_list;
1021 /* device index hash chain */
1022 struct hlist_node index_hlist;
1024 struct list_head link_watch_list;
1026 /* register/unregister state machine */
1027 enum { NETREG_UNINITIALIZED=0,
1028 NETREG_REGISTERED, /* completed register_netdevice */
1029 NETREG_UNREGISTERING, /* called unregister_netdevice */
1030 NETREG_UNREGISTERED, /* completed unregister todo */
1031 NETREG_RELEASED, /* called free_netdev */
1032 NETREG_DUMMY, /* dummy device for NAPI poll */
1036 RTNL_LINK_INITIALIZED,
1037 RTNL_LINK_INITIALIZING,
1038 } rtnl_link_state:16;
1040 /* Called from unregister, can be used to call free_netdev */
1041 void (*destructor)(struct net_device *dev);
1043 #ifdef CONFIG_NETPOLL
1044 struct netpoll_info *npinfo;
1047 #ifdef CONFIG_NET_NS
1048 /* Network namespace this network device is inside */
1052 /* mid-layer private */
1055 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1058 struct garp_port *garp_port;
1060 /* class/net/name entry */
1062 /* space for optional device, statistics, and wireless sysfs groups */
1063 const struct attribute_group *sysfs_groups[4];
1065 /* rtnetlink link ops */
1066 const struct rtnl_link_ops *rtnl_link_ops;
1068 /* VLAN feature mask */
1069 unsigned long vlan_features;
1071 /* for setting kernel sock attribute on TCP connection setup */
1072 #define GSO_MAX_SIZE 65536
1073 unsigned int gso_max_size;
1076 /* Data Center Bridging netlink ops */
1077 const struct dcbnl_rtnl_ops *dcbnl_ops;
1080 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1081 /* max exchange id for FCoE LRO by ddp */
1082 unsigned int fcoe_ddp_xid;
1084 /* n-tuple filter list attached to this device */
1085 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1087 /* phy device may attach itself for hardware timestamping */
1088 struct phy_device *phydev;
1090 #define to_net_dev(d) container_of(d, struct net_device, dev)
1092 #define NETDEV_ALIGN 32
1095 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1098 return &dev->_tx[index];
1101 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1102 void (*f)(struct net_device *,
1103 struct netdev_queue *,
1109 for (i = 0; i < dev->num_tx_queues; i++)
1110 f(dev, &dev->_tx[i], arg);
1114 * Net namespace inlines
1117 struct net *dev_net(const struct net_device *dev)
1119 return read_pnet(&dev->nd_net);
1123 void dev_net_set(struct net_device *dev, struct net *net)
1125 #ifdef CONFIG_NET_NS
1126 release_net(dev->nd_net);
1127 dev->nd_net = hold_net(net);
1131 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1133 #ifdef CONFIG_NET_DSA_TAG_DSA
1134 if (dev->dsa_ptr != NULL)
1135 return dsa_uses_dsa_tags(dev->dsa_ptr);
1141 #ifndef CONFIG_NET_NS
1142 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1146 #else /* CONFIG_NET_NS */
1147 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1150 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1152 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1153 if (dev->dsa_ptr != NULL)
1154 return dsa_uses_trailer_tags(dev->dsa_ptr);
1161 * netdev_priv - access network device private data
1162 * @dev: network device
1164 * Get network device private data
1166 static inline void *netdev_priv(const struct net_device *dev)
1168 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1171 /* Set the sysfs physical device reference for the network logical device
1172 * if set prior to registration will cause a symlink during initialization.
1174 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1176 /* Set the sysfs device type for the network logical device to allow
1177 * fin grained indentification of different network device types. For
1178 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1180 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1183 * netif_napi_add - initialize a napi context
1184 * @dev: network device
1185 * @napi: napi context
1186 * @poll: polling function
1187 * @weight: default weight
1189 * netif_napi_add() must be used to initialize a napi context prior to calling
1190 * *any* of the other napi related functions.
1192 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1193 int (*poll)(struct napi_struct *, int), int weight);
1196 * netif_napi_del - remove a napi context
1197 * @napi: napi context
1199 * netif_napi_del() removes a napi context from the network device napi list
1201 void netif_napi_del(struct napi_struct *napi);
1203 struct napi_gro_cb {
1204 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1207 /* Length of frag0. */
1208 unsigned int frag0_len;
1210 /* This indicates where we are processing relative to skb->data. */
1213 /* This is non-zero if the packet may be of the same flow. */
1216 /* This is non-zero if the packet cannot be merged with the new skb. */
1219 /* Number of segments aggregated. */
1226 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1228 struct packet_type {
1229 __be16 type; /* This is really htons(ether_type). */
1230 struct net_device *dev; /* NULL is wildcarded here */
1231 int (*func) (struct sk_buff *,
1232 struct net_device *,
1233 struct packet_type *,
1234 struct net_device *);
1235 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1237 int (*gso_send_check)(struct sk_buff *skb);
1238 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1239 struct sk_buff *skb);
1240 int (*gro_complete)(struct sk_buff *skb);
1241 void *af_packet_priv;
1242 struct list_head list;
1245 #include <linux/interrupt.h>
1246 #include <linux/notifier.h>
1248 extern rwlock_t dev_base_lock; /* Device list lock */
1251 #define for_each_netdev(net, d) \
1252 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1253 #define for_each_netdev_reverse(net, d) \
1254 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1255 #define for_each_netdev_rcu(net, d) \
1256 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1257 #define for_each_netdev_safe(net, d, n) \
1258 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1259 #define for_each_netdev_continue(net, d) \
1260 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1261 #define for_each_netdev_continue_rcu(net, d) \
1262 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1263 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1265 static inline struct net_device *next_net_device(struct net_device *dev)
1267 struct list_head *lh;
1271 lh = dev->dev_list.next;
1272 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1275 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1277 struct list_head *lh;
1281 lh = rcu_dereference(dev->dev_list.next);
1282 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1285 static inline struct net_device *first_net_device(struct net *net)
1287 return list_empty(&net->dev_base_head) ? NULL :
1288 net_device_entry(net->dev_base_head.next);
1291 extern int netdev_boot_setup_check(struct net_device *dev);
1292 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1293 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1294 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1295 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1296 extern void dev_add_pack(struct packet_type *pt);
1297 extern void dev_remove_pack(struct packet_type *pt);
1298 extern void __dev_remove_pack(struct packet_type *pt);
1300 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1301 unsigned short mask);
1302 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1303 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1304 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1305 extern int dev_alloc_name(struct net_device *dev, const char *name);
1306 extern int dev_open(struct net_device *dev);
1307 extern int dev_close(struct net_device *dev);
1308 extern void dev_disable_lro(struct net_device *dev);
1309 extern int dev_queue_xmit(struct sk_buff *skb);
1310 extern int register_netdevice(struct net_device *dev);
1311 extern void unregister_netdevice_queue(struct net_device *dev,
1312 struct list_head *head);
1313 extern void unregister_netdevice_many(struct list_head *head);
1314 static inline void unregister_netdevice(struct net_device *dev)
1316 unregister_netdevice_queue(dev, NULL);
1319 extern void free_netdev(struct net_device *dev);
1320 extern void synchronize_net(void);
1321 extern int register_netdevice_notifier(struct notifier_block *nb);
1322 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1323 extern int init_dummy_netdev(struct net_device *dev);
1324 extern void netdev_resync_ops(struct net_device *dev);
1326 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1327 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1328 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1329 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1330 extern int dev_restart(struct net_device *dev);
1331 #ifdef CONFIG_NETPOLL_TRAP
1332 extern int netpoll_trap(void);
1334 extern int skb_gro_receive(struct sk_buff **head,
1335 struct sk_buff *skb);
1336 extern void skb_gro_reset_offset(struct sk_buff *skb);
1338 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1340 return NAPI_GRO_CB(skb)->data_offset;
1343 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1345 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1348 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1350 NAPI_GRO_CB(skb)->data_offset += len;
1353 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1354 unsigned int offset)
1356 return NAPI_GRO_CB(skb)->frag0 + offset;
1359 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1361 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1364 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1365 unsigned int offset)
1367 NAPI_GRO_CB(skb)->frag0 = NULL;
1368 NAPI_GRO_CB(skb)->frag0_len = 0;
1369 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1372 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1374 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1377 static inline void *skb_gro_network_header(struct sk_buff *skb)
1379 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1380 skb_network_offset(skb);
1383 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1384 unsigned short type,
1385 const void *daddr, const void *saddr,
1388 if (!dev->header_ops || !dev->header_ops->create)
1391 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1394 static inline int dev_parse_header(const struct sk_buff *skb,
1395 unsigned char *haddr)
1397 const struct net_device *dev = skb->dev;
1399 if (!dev->header_ops || !dev->header_ops->parse)
1401 return dev->header_ops->parse(skb, haddr);
1404 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1405 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1406 static inline int unregister_gifconf(unsigned int family)
1408 return register_gifconf(family, NULL);
1412 * Incoming packets are placed on per-cpu queues
1414 struct softnet_data {
1415 struct Qdisc *output_queue;
1416 struct Qdisc **output_queue_tailp;
1417 struct list_head poll_list;
1418 struct sk_buff *completion_queue;
1419 struct sk_buff_head process_queue;
1422 unsigned int processed;
1423 unsigned int time_squeeze;
1424 unsigned int cpu_collision;
1425 unsigned int received_rps;
1428 struct softnet_data *rps_ipi_list;
1430 /* Elements below can be accessed between CPUs for RPS */
1431 struct call_single_data csd ____cacheline_aligned_in_smp;
1432 struct softnet_data *rps_ipi_next;
1434 unsigned int input_queue_head;
1435 unsigned int input_queue_tail;
1438 struct sk_buff_head input_pkt_queue;
1439 struct napi_struct backlog;
1442 static inline void input_queue_head_incr(struct softnet_data *sd)
1445 sd->input_queue_head++;
1449 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1450 unsigned int *qtail)
1453 *qtail = ++sd->input_queue_tail;
1457 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1459 #define HAVE_NETIF_QUEUE
1461 extern void __netif_schedule(struct Qdisc *q);
1463 static inline void netif_schedule_queue(struct netdev_queue *txq)
1465 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1466 __netif_schedule(txq->qdisc);
1469 static inline void netif_tx_schedule_all(struct net_device *dev)
1473 for (i = 0; i < dev->num_tx_queues; i++)
1474 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1477 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1479 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1483 * netif_start_queue - allow transmit
1484 * @dev: network device
1486 * Allow upper layers to call the device hard_start_xmit routine.
1488 static inline void netif_start_queue(struct net_device *dev)
1490 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1493 static inline void netif_tx_start_all_queues(struct net_device *dev)
1497 for (i = 0; i < dev->num_tx_queues; i++) {
1498 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1499 netif_tx_start_queue(txq);
1503 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1505 #ifdef CONFIG_NETPOLL_TRAP
1506 if (netpoll_trap()) {
1507 netif_tx_start_queue(dev_queue);
1511 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1512 __netif_schedule(dev_queue->qdisc);
1516 * netif_wake_queue - restart transmit
1517 * @dev: network device
1519 * Allow upper layers to call the device hard_start_xmit routine.
1520 * Used for flow control when transmit resources are available.
1522 static inline void netif_wake_queue(struct net_device *dev)
1524 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1527 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1531 for (i = 0; i < dev->num_tx_queues; i++) {
1532 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1533 netif_tx_wake_queue(txq);
1537 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1539 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1543 * netif_stop_queue - stop transmitted packets
1544 * @dev: network device
1546 * Stop upper layers calling the device hard_start_xmit routine.
1547 * Used for flow control when transmit resources are unavailable.
1549 static inline void netif_stop_queue(struct net_device *dev)
1551 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1554 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1558 for (i = 0; i < dev->num_tx_queues; i++) {
1559 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1560 netif_tx_stop_queue(txq);
1564 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1566 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1570 * netif_queue_stopped - test if transmit queue is flowblocked
1571 * @dev: network device
1573 * Test if transmit queue on device is currently unable to send.
1575 static inline int netif_queue_stopped(const struct net_device *dev)
1577 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1580 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1582 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1586 * netif_running - test if up
1587 * @dev: network device
1589 * Test if the device has been brought up.
1591 static inline int netif_running(const struct net_device *dev)
1593 return test_bit(__LINK_STATE_START, &dev->state);
1597 * Routines to manage the subqueues on a device. We only need start
1598 * stop, and a check if it's stopped. All other device management is
1599 * done at the overall netdevice level.
1600 * Also test the device if we're multiqueue.
1604 * netif_start_subqueue - allow sending packets on subqueue
1605 * @dev: network device
1606 * @queue_index: sub queue index
1608 * Start individual transmit queue of a device with multiple transmit queues.
1610 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1612 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1614 netif_tx_start_queue(txq);
1618 * netif_stop_subqueue - stop sending packets on subqueue
1619 * @dev: network device
1620 * @queue_index: sub queue index
1622 * Stop individual transmit queue of a device with multiple transmit queues.
1624 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1626 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1627 #ifdef CONFIG_NETPOLL_TRAP
1631 netif_tx_stop_queue(txq);
1635 * netif_subqueue_stopped - test status of subqueue
1636 * @dev: network device
1637 * @queue_index: sub queue index
1639 * Check individual transmit queue of a device with multiple transmit queues.
1641 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1644 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1646 return netif_tx_queue_stopped(txq);
1649 static inline int netif_subqueue_stopped(const struct net_device *dev,
1650 struct sk_buff *skb)
1652 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1656 * netif_wake_subqueue - allow sending packets on subqueue
1657 * @dev: network device
1658 * @queue_index: sub queue index
1660 * Resume individual transmit queue of a device with multiple transmit queues.
1662 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1664 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1665 #ifdef CONFIG_NETPOLL_TRAP
1669 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1670 __netif_schedule(txq->qdisc);
1674 * netif_is_multiqueue - test if device has multiple transmit queues
1675 * @dev: network device
1677 * Check if device has multiple transmit queues
1679 static inline int netif_is_multiqueue(const struct net_device *dev)
1681 return dev->num_tx_queues > 1;
1684 extern void netif_set_real_num_tx_queues(struct net_device *dev,
1687 /* Use this variant when it is known for sure that it
1688 * is executing from hardware interrupt context or with hardware interrupts
1691 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1693 /* Use this variant in places where it could be invoked
1694 * from either hardware interrupt or other context, with hardware interrupts
1695 * either disabled or enabled.
1697 extern void dev_kfree_skb_any(struct sk_buff *skb);
1699 #define HAVE_NETIF_RX 1
1700 extern int netif_rx(struct sk_buff *skb);
1701 extern int netif_rx_ni(struct sk_buff *skb);
1702 #define HAVE_NETIF_RECEIVE_SKB 1
1703 extern int netif_receive_skb(struct sk_buff *skb);
1704 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1705 struct sk_buff *skb);
1706 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1707 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1708 struct sk_buff *skb);
1709 extern void napi_gro_flush(struct napi_struct *napi);
1710 extern void napi_reuse_skb(struct napi_struct *napi,
1711 struct sk_buff *skb);
1712 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1713 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1714 struct sk_buff *skb,
1716 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1717 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1719 static inline void napi_free_frags(struct napi_struct *napi)
1721 kfree_skb(napi->skb);
1725 extern int netdev_rx_handler_register(struct net_device *dev,
1726 rx_handler_func_t *rx_handler,
1727 void *rx_handler_data);
1728 extern void netdev_rx_handler_unregister(struct net_device *dev);
1730 extern void netif_nit_deliver(struct sk_buff *skb);
1731 extern int dev_valid_name(const char *name);
1732 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1733 extern int dev_ethtool(struct net *net, struct ifreq *);
1734 extern unsigned dev_get_flags(const struct net_device *);
1735 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1736 extern int dev_change_flags(struct net_device *, unsigned);
1737 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1738 extern int dev_change_name(struct net_device *, const char *);
1739 extern int dev_set_alias(struct net_device *, const char *, size_t);
1740 extern int dev_change_net_namespace(struct net_device *,
1741 struct net *, const char *);
1742 extern int dev_set_mtu(struct net_device *, int);
1743 extern int dev_set_mac_address(struct net_device *,
1745 extern int dev_hard_start_xmit(struct sk_buff *skb,
1746 struct net_device *dev,
1747 struct netdev_queue *txq);
1748 extern int dev_forward_skb(struct net_device *dev,
1749 struct sk_buff *skb);
1751 extern int netdev_budget;
1753 /* Called by rtnetlink.c:rtnl_unlock() */
1754 extern void netdev_run_todo(void);
1757 * dev_put - release reference to device
1758 * @dev: network device
1760 * Release reference to device to allow it to be freed.
1762 static inline void dev_put(struct net_device *dev)
1764 atomic_dec(&dev->refcnt);
1768 * dev_hold - get reference to device
1769 * @dev: network device
1771 * Hold reference to device to keep it from being freed.
1773 static inline void dev_hold(struct net_device *dev)
1775 atomic_inc(&dev->refcnt);
1778 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1779 * and _off may be called from IRQ context, but it is caller
1780 * who is responsible for serialization of these calls.
1782 * The name carrier is inappropriate, these functions should really be
1783 * called netif_lowerlayer_*() because they represent the state of any
1784 * kind of lower layer not just hardware media.
1787 extern void linkwatch_fire_event(struct net_device *dev);
1788 extern void linkwatch_forget_dev(struct net_device *dev);
1791 * netif_carrier_ok - test if carrier present
1792 * @dev: network device
1794 * Check if carrier is present on device
1796 static inline int netif_carrier_ok(const struct net_device *dev)
1798 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1801 extern unsigned long dev_trans_start(struct net_device *dev);
1803 extern void __netdev_watchdog_up(struct net_device *dev);
1805 extern void netif_carrier_on(struct net_device *dev);
1807 extern void netif_carrier_off(struct net_device *dev);
1809 extern void netif_notify_peers(struct net_device *dev);
1812 * netif_dormant_on - mark device as dormant.
1813 * @dev: network device
1815 * Mark device as dormant (as per RFC2863).
1817 * The dormant state indicates that the relevant interface is not
1818 * actually in a condition to pass packets (i.e., it is not 'up') but is
1819 * in a "pending" state, waiting for some external event. For "on-
1820 * demand" interfaces, this new state identifies the situation where the
1821 * interface is waiting for events to place it in the up state.
1824 static inline void netif_dormant_on(struct net_device *dev)
1826 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1827 linkwatch_fire_event(dev);
1831 * netif_dormant_off - set device as not dormant.
1832 * @dev: network device
1834 * Device is not in dormant state.
1836 static inline void netif_dormant_off(struct net_device *dev)
1838 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1839 linkwatch_fire_event(dev);
1843 * netif_dormant - test if carrier present
1844 * @dev: network device
1846 * Check if carrier is present on device
1848 static inline int netif_dormant(const struct net_device *dev)
1850 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1855 * netif_oper_up - test if device is operational
1856 * @dev: network device
1858 * Check if carrier is operational
1860 static inline int netif_oper_up(const struct net_device *dev)
1862 return (dev->operstate == IF_OPER_UP ||
1863 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1867 * netif_device_present - is device available or removed
1868 * @dev: network device
1870 * Check if device has not been removed from system.
1872 static inline int netif_device_present(struct net_device *dev)
1874 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1877 extern void netif_device_detach(struct net_device *dev);
1879 extern void netif_device_attach(struct net_device *dev);
1882 * Network interface message level settings
1884 #define HAVE_NETIF_MSG 1
1887 NETIF_MSG_DRV = 0x0001,
1888 NETIF_MSG_PROBE = 0x0002,
1889 NETIF_MSG_LINK = 0x0004,
1890 NETIF_MSG_TIMER = 0x0008,
1891 NETIF_MSG_IFDOWN = 0x0010,
1892 NETIF_MSG_IFUP = 0x0020,
1893 NETIF_MSG_RX_ERR = 0x0040,
1894 NETIF_MSG_TX_ERR = 0x0080,
1895 NETIF_MSG_TX_QUEUED = 0x0100,
1896 NETIF_MSG_INTR = 0x0200,
1897 NETIF_MSG_TX_DONE = 0x0400,
1898 NETIF_MSG_RX_STATUS = 0x0800,
1899 NETIF_MSG_PKTDATA = 0x1000,
1900 NETIF_MSG_HW = 0x2000,
1901 NETIF_MSG_WOL = 0x4000,
1904 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1905 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1906 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1907 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1908 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1909 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1910 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1911 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1912 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1913 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1914 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1915 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1916 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1917 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1918 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1920 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1923 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1924 return default_msg_enable_bits;
1925 if (debug_value == 0) /* no output */
1927 /* set low N bits */
1928 return (1 << debug_value) - 1;
1931 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1933 spin_lock(&txq->_xmit_lock);
1934 txq->xmit_lock_owner = cpu;
1937 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1939 spin_lock_bh(&txq->_xmit_lock);
1940 txq->xmit_lock_owner = smp_processor_id();
1943 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1945 int ok = spin_trylock(&txq->_xmit_lock);
1947 txq->xmit_lock_owner = smp_processor_id();
1951 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1953 txq->xmit_lock_owner = -1;
1954 spin_unlock(&txq->_xmit_lock);
1957 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1959 txq->xmit_lock_owner = -1;
1960 spin_unlock_bh(&txq->_xmit_lock);
1963 static inline void txq_trans_update(struct netdev_queue *txq)
1965 if (txq->xmit_lock_owner != -1)
1966 txq->trans_start = jiffies;
1970 * netif_tx_lock - grab network device transmit lock
1971 * @dev: network device
1973 * Get network device transmit lock
1975 static inline void netif_tx_lock(struct net_device *dev)
1980 spin_lock(&dev->tx_global_lock);
1981 cpu = smp_processor_id();
1982 for (i = 0; i < dev->num_tx_queues; i++) {
1983 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1985 /* We are the only thread of execution doing a
1986 * freeze, but we have to grab the _xmit_lock in
1987 * order to synchronize with threads which are in
1988 * the ->hard_start_xmit() handler and already
1989 * checked the frozen bit.
1991 __netif_tx_lock(txq, cpu);
1992 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1993 __netif_tx_unlock(txq);
1997 static inline void netif_tx_lock_bh(struct net_device *dev)
2003 static inline void netif_tx_unlock(struct net_device *dev)
2007 for (i = 0; i < dev->num_tx_queues; i++) {
2008 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2010 /* No need to grab the _xmit_lock here. If the
2011 * queue is not stopped for another reason, we
2014 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2015 netif_schedule_queue(txq);
2017 spin_unlock(&dev->tx_global_lock);
2020 static inline void netif_tx_unlock_bh(struct net_device *dev)
2022 netif_tx_unlock(dev);
2026 #define HARD_TX_LOCK(dev, txq, cpu) { \
2027 if ((dev->features & NETIF_F_LLTX) == 0) { \
2028 __netif_tx_lock(txq, cpu); \
2032 #define HARD_TX_UNLOCK(dev, txq) { \
2033 if ((dev->features & NETIF_F_LLTX) == 0) { \
2034 __netif_tx_unlock(txq); \
2038 static inline void netif_tx_disable(struct net_device *dev)
2044 cpu = smp_processor_id();
2045 for (i = 0; i < dev->num_tx_queues; i++) {
2046 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2048 __netif_tx_lock(txq, cpu);
2049 netif_tx_stop_queue(txq);
2050 __netif_tx_unlock(txq);
2055 static inline void netif_addr_lock(struct net_device *dev)
2057 spin_lock(&dev->addr_list_lock);
2060 static inline void netif_addr_lock_bh(struct net_device *dev)
2062 spin_lock_bh(&dev->addr_list_lock);
2065 static inline void netif_addr_unlock(struct net_device *dev)
2067 spin_unlock(&dev->addr_list_lock);
2070 static inline void netif_addr_unlock_bh(struct net_device *dev)
2072 spin_unlock_bh(&dev->addr_list_lock);
2076 * dev_addrs walker. Should be used only for read access. Call with
2077 * rcu_read_lock held.
2079 #define for_each_dev_addr(dev, ha) \
2080 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2082 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2084 extern void ether_setup(struct net_device *dev);
2086 /* Support for loadable net-drivers */
2087 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
2088 void (*setup)(struct net_device *),
2089 unsigned int queue_count);
2090 #define alloc_netdev(sizeof_priv, name, setup) \
2091 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2092 extern int register_netdev(struct net_device *dev);
2093 extern void unregister_netdev(struct net_device *dev);
2095 /* General hardware address lists handling functions */
2096 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2097 struct netdev_hw_addr_list *from_list,
2098 int addr_len, unsigned char addr_type);
2099 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2100 struct netdev_hw_addr_list *from_list,
2101 int addr_len, unsigned char addr_type);
2102 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2103 struct netdev_hw_addr_list *from_list,
2105 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2106 struct netdev_hw_addr_list *from_list,
2108 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2109 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2111 /* Functions used for device addresses handling */
2112 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2113 unsigned char addr_type);
2114 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2115 unsigned char addr_type);
2116 extern int dev_addr_add_multiple(struct net_device *to_dev,
2117 struct net_device *from_dev,
2118 unsigned char addr_type);
2119 extern int dev_addr_del_multiple(struct net_device *to_dev,
2120 struct net_device *from_dev,
2121 unsigned char addr_type);
2122 extern void dev_addr_flush(struct net_device *dev);
2123 extern int dev_addr_init(struct net_device *dev);
2125 /* Functions used for unicast addresses handling */
2126 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2127 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2128 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2129 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2130 extern void dev_uc_flush(struct net_device *dev);
2131 extern void dev_uc_init(struct net_device *dev);
2133 /* Functions used for multicast addresses handling */
2134 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2135 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2136 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2137 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2138 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2139 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2140 extern void dev_mc_flush(struct net_device *dev);
2141 extern void dev_mc_init(struct net_device *dev);
2143 /* Functions used for secondary unicast and multicast support */
2144 extern void dev_set_rx_mode(struct net_device *dev);
2145 extern void __dev_set_rx_mode(struct net_device *dev);
2146 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2147 extern int dev_set_allmulti(struct net_device *dev, int inc);
2148 extern void netdev_state_change(struct net_device *dev);
2149 extern int netdev_bonding_change(struct net_device *dev,
2150 unsigned long event);
2151 extern void netdev_features_change(struct net_device *dev);
2152 /* Load a device via the kmod */
2153 extern void dev_load(struct net *net, const char *name);
2154 extern void dev_mcast_init(void);
2155 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2156 struct rtnl_link_stats64 *storage);
2157 extern void dev_txq_stats_fold(const struct net_device *dev,
2158 struct rtnl_link_stats64 *stats);
2160 extern int netdev_max_backlog;
2161 extern int netdev_tstamp_prequeue;
2162 extern int weight_p;
2163 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2164 extern int skb_checksum_help(struct sk_buff *skb);
2165 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2167 extern void netdev_rx_csum_fault(struct net_device *dev);
2169 static inline void netdev_rx_csum_fault(struct net_device *dev)
2173 /* rx skb timestamps */
2174 extern void net_enable_timestamp(void);
2175 extern void net_disable_timestamp(void);
2177 #ifdef CONFIG_PROC_FS
2178 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2179 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2180 extern void dev_seq_stop(struct seq_file *seq, void *v);
2183 extern int netdev_class_create_file(struct class_attribute *class_attr);
2184 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2186 extern struct kobj_ns_type_operations net_ns_type_operations;
2188 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2190 extern void linkwatch_run_queue(void);
2192 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2193 unsigned long mask);
2194 unsigned long netdev_fix_features(unsigned long features, const char *name);
2196 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2197 struct net_device *dev);
2199 static inline int net_gso_ok(int features, int gso_type)
2201 int feature = gso_type << NETIF_F_GSO_SHIFT;
2202 return (features & feature) == feature;
2205 static inline int skb_gso_ok(struct sk_buff *skb, int features)
2207 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2208 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2211 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2213 return skb_is_gso(skb) &&
2214 (!skb_gso_ok(skb, dev->features) ||
2215 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2218 static inline void netif_set_gso_max_size(struct net_device *dev,
2221 dev->gso_max_size = size;
2224 extern int __skb_bond_should_drop(struct sk_buff *skb,
2225 struct net_device *master);
2227 static inline int skb_bond_should_drop(struct sk_buff *skb,
2228 struct net_device *master)
2231 return __skb_bond_should_drop(skb, master);
2235 extern struct pernet_operations __net_initdata loopback_net_ops;
2237 static inline int dev_ethtool_get_settings(struct net_device *dev,
2238 struct ethtool_cmd *cmd)
2240 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2242 return dev->ethtool_ops->get_settings(dev, cmd);
2245 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2247 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2249 return dev->ethtool_ops->get_rx_csum(dev);
2252 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2254 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2256 return dev->ethtool_ops->get_flags(dev);
2259 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2261 /* netdev_printk helpers, similar to dev_printk */
2263 static inline const char *netdev_name(const struct net_device *dev)
2265 if (dev->reg_state != NETREG_REGISTERED)
2266 return "(unregistered net_device)";
2270 extern int netdev_printk(const char *level, const struct net_device *dev,
2271 const char *format, ...)
2272 __attribute__ ((format (printf, 3, 4)));
2273 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2274 __attribute__ ((format (printf, 2, 3)));
2275 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2276 __attribute__ ((format (printf, 2, 3)));
2277 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2278 __attribute__ ((format (printf, 2, 3)));
2279 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2280 __attribute__ ((format (printf, 2, 3)));
2281 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2282 __attribute__ ((format (printf, 2, 3)));
2283 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2284 __attribute__ ((format (printf, 2, 3)));
2285 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2286 __attribute__ ((format (printf, 2, 3)));
2289 #define netdev_dbg(__dev, format, args...) \
2290 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2291 #elif defined(CONFIG_DYNAMIC_DEBUG)
2292 #define netdev_dbg(__dev, format, args...) \
2294 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2295 netdev_name(__dev), ##args); \
2298 #define netdev_dbg(__dev, format, args...) \
2301 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2306 #if defined(VERBOSE_DEBUG)
2307 #define netdev_vdbg netdev_dbg
2310 #define netdev_vdbg(dev, format, args...) \
2313 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2319 * netdev_WARN() acts like dev_printk(), but with the key difference
2320 * of using a WARN/WARN_ON to get the message out, including the
2321 * file/line information and a backtrace.
2323 #define netdev_WARN(dev, format, args...) \
2324 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2326 /* netif printk helpers, similar to netdev_printk */
2328 #define netif_printk(priv, type, level, dev, fmt, args...) \
2330 if (netif_msg_##type(priv)) \
2331 netdev_printk(level, (dev), fmt, ##args); \
2334 #define netif_level(level, priv, type, dev, fmt, args...) \
2336 if (netif_msg_##type(priv)) \
2337 netdev_##level(dev, fmt, ##args); \
2340 #define netif_emerg(priv, type, dev, fmt, args...) \
2341 netif_level(emerg, priv, type, dev, fmt, ##args)
2342 #define netif_alert(priv, type, dev, fmt, args...) \
2343 netif_level(alert, priv, type, dev, fmt, ##args)
2344 #define netif_crit(priv, type, dev, fmt, args...) \
2345 netif_level(crit, priv, type, dev, fmt, ##args)
2346 #define netif_err(priv, type, dev, fmt, args...) \
2347 netif_level(err, priv, type, dev, fmt, ##args)
2348 #define netif_warn(priv, type, dev, fmt, args...) \
2349 netif_level(warn, priv, type, dev, fmt, ##args)
2350 #define netif_notice(priv, type, dev, fmt, args...) \
2351 netif_level(notice, priv, type, dev, fmt, ##args)
2352 #define netif_info(priv, type, dev, fmt, args...) \
2353 netif_level(info, priv, type, dev, fmt, ##args)
2356 #define netif_dbg(priv, type, dev, format, args...) \
2357 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2358 #elif defined(CONFIG_DYNAMIC_DEBUG)
2359 #define netif_dbg(priv, type, netdev, format, args...) \
2361 if (netif_msg_##type(priv)) \
2362 dynamic_dev_dbg((netdev)->dev.parent, \
2364 netdev_name(netdev), ##args); \
2367 #define netif_dbg(priv, type, dev, format, args...) \
2370 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2375 #if defined(VERBOSE_DEBUG)
2376 #define netif_vdbg netif_dbg
2378 #define netif_vdbg(priv, type, dev, format, args...) \
2381 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2386 #endif /* __KERNEL__ */
2388 #endif /* _LINUX_NETDEVICE_H */