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 */
78 /* Initial net device group. All devices belong to group 0 by default. */
79 #define INIT_NETDEV_GROUP 0
82 * Transmit return codes: transmit return codes originate from three different
85 * - qdisc return codes
86 * - driver transmit return codes
89 * Drivers are allowed to return any one of those in their hard_start_xmit()
90 * function. Real network devices commonly used with qdiscs should only return
91 * the driver transmit return codes though - when qdiscs are used, the actual
92 * transmission happens asynchronously, so the value is not propagated to
93 * higher layers. Virtual network devices transmit synchronously, in this case
94 * the driver transmit return codes are consumed by dev_queue_xmit(), all
95 * others are propagated to higher layers.
98 /* qdisc ->enqueue() return codes. */
99 #define NET_XMIT_SUCCESS 0x00
100 #define NET_XMIT_DROP 0x01 /* skb dropped */
101 #define NET_XMIT_CN 0x02 /* congestion notification */
102 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
103 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
105 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
106 * indicates that the device will soon be dropping packets, or already drops
107 * some packets of the same priority; prompting us to send less aggressively. */
108 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
109 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
111 /* Driver transmit return codes */
112 #define NETDEV_TX_MASK 0xf0
115 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
116 NETDEV_TX_OK = 0x00, /* driver took care of packet */
117 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
118 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
120 typedef enum netdev_tx netdev_tx_t;
123 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
124 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
126 static inline bool dev_xmit_complete(int rc)
129 * Positive cases with an skb consumed by a driver:
130 * - successful transmission (rc == NETDEV_TX_OK)
131 * - error while transmitting (rc < 0)
132 * - error while queueing to a different device (rc & NET_XMIT_MASK)
134 if (likely(rc < NET_XMIT_MASK))
142 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
146 * Compute the worst case header length according to the protocols
150 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
151 # if defined(CONFIG_MAC80211_MESH)
152 # define LL_MAX_HEADER 128
154 # define LL_MAX_HEADER 96
156 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
157 # define LL_MAX_HEADER 48
159 # define LL_MAX_HEADER 32
162 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
163 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
164 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
165 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
166 #define MAX_HEADER LL_MAX_HEADER
168 #define MAX_HEADER (LL_MAX_HEADER + 48)
172 * Old network device statistics. Fields are native words
173 * (unsigned long) so they can be read and written atomically.
176 struct net_device_stats {
177 unsigned long rx_packets;
178 unsigned long tx_packets;
179 unsigned long rx_bytes;
180 unsigned long tx_bytes;
181 unsigned long rx_errors;
182 unsigned long tx_errors;
183 unsigned long rx_dropped;
184 unsigned long tx_dropped;
185 unsigned long multicast;
186 unsigned long collisions;
187 unsigned long rx_length_errors;
188 unsigned long rx_over_errors;
189 unsigned long rx_crc_errors;
190 unsigned long rx_frame_errors;
191 unsigned long rx_fifo_errors;
192 unsigned long rx_missed_errors;
193 unsigned long tx_aborted_errors;
194 unsigned long tx_carrier_errors;
195 unsigned long tx_fifo_errors;
196 unsigned long tx_heartbeat_errors;
197 unsigned long tx_window_errors;
198 unsigned long rx_compressed;
199 unsigned long tx_compressed;
202 #endif /* __KERNEL__ */
205 /* Media selection options. */
218 #include <linux/cache.h>
219 #include <linux/skbuff.h>
225 struct netdev_hw_addr {
226 struct list_head list;
227 unsigned char addr[MAX_ADDR_LEN];
229 #define NETDEV_HW_ADDR_T_LAN 1
230 #define NETDEV_HW_ADDR_T_SAN 2
231 #define NETDEV_HW_ADDR_T_SLAVE 3
232 #define NETDEV_HW_ADDR_T_UNICAST 4
233 #define NETDEV_HW_ADDR_T_MULTICAST 5
237 struct rcu_head rcu_head;
240 struct netdev_hw_addr_list {
241 struct list_head list;
245 #define netdev_hw_addr_list_count(l) ((l)->count)
246 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
247 #define netdev_hw_addr_list_for_each(ha, l) \
248 list_for_each_entry(ha, &(l)->list, list)
250 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
251 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
252 #define netdev_for_each_uc_addr(ha, dev) \
253 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
255 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
256 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
257 #define netdev_for_each_mc_addr(ha, dev) \
258 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
261 struct hh_cache *hh_next; /* Next entry */
262 atomic_t hh_refcnt; /* number of users */
264 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
266 * They are mostly read, but hh_refcnt may be changed quite frequently,
267 * incurring cache line ping pongs.
269 __be16 hh_type ____cacheline_aligned_in_smp;
270 /* protocol identifier, f.e ETH_P_IP
271 * NOTE: For VLANs, this will be the
272 * encapuslated type. --BLG
274 u16 hh_len; /* length of header */
275 int (*hh_output)(struct sk_buff *skb);
278 /* cached hardware header; allow for machine alignment needs. */
279 #define HH_DATA_MOD 16
280 #define HH_DATA_OFF(__len) \
281 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
282 #define HH_DATA_ALIGN(__len) \
283 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
284 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
287 static inline void hh_cache_put(struct hh_cache *hh)
289 if (atomic_dec_and_test(&hh->hh_refcnt))
293 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
295 * dev->hard_header_len ? (dev->hard_header_len +
296 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
298 * We could use other alignment values, but we must maintain the
299 * relationship HH alignment <= LL alignment.
301 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
304 #define LL_RESERVED_SPACE(dev) \
305 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
306 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
307 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308 #define LL_ALLOCATED_SPACE(dev) \
309 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
312 int (*create) (struct sk_buff *skb, struct net_device *dev,
313 unsigned short type, const void *daddr,
314 const void *saddr, unsigned len);
315 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
316 int (*rebuild)(struct sk_buff *skb);
317 #define HAVE_HEADER_CACHE
318 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
319 void (*cache_update)(struct hh_cache *hh,
320 const struct net_device *dev,
321 const unsigned char *haddr);
324 /* These flag bits are private to the generic network queueing
325 * layer, they may not be explicitly referenced by any other
329 enum netdev_state_t {
331 __LINK_STATE_PRESENT,
332 __LINK_STATE_NOCARRIER,
333 __LINK_STATE_LINKWATCH_PENDING,
334 __LINK_STATE_DORMANT,
339 * This structure holds at boot time configured netdevice settings. They
340 * are then used in the device probing.
342 struct netdev_boot_setup {
346 #define NETDEV_BOOT_SETUP_MAX 8
348 extern int __init netdev_boot_setup(char *str);
351 * Structure for NAPI scheduling similar to tasklet but with weighting
354 /* The poll_list must only be managed by the entity which
355 * changes the state of the NAPI_STATE_SCHED bit. This means
356 * whoever atomically sets that bit can add this napi_struct
357 * to the per-cpu poll_list, and whoever clears that bit
358 * can remove from the list right before clearing the bit.
360 struct list_head poll_list;
364 int (*poll)(struct napi_struct *, int);
365 #ifdef CONFIG_NETPOLL
366 spinlock_t poll_lock;
370 unsigned int gro_count;
372 struct net_device *dev;
373 struct list_head dev_list;
374 struct sk_buff *gro_list;
379 NAPI_STATE_SCHED, /* Poll is scheduled */
380 NAPI_STATE_DISABLE, /* Disable pending */
381 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
391 typedef enum gro_result gro_result_t;
393 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
395 extern void __napi_schedule(struct napi_struct *n);
397 static inline int napi_disable_pending(struct napi_struct *n)
399 return test_bit(NAPI_STATE_DISABLE, &n->state);
403 * napi_schedule_prep - check if napi can be scheduled
406 * Test if NAPI routine is already running, and if not mark
407 * it as running. This is used as a condition variable
408 * insure only one NAPI poll instance runs. We also make
409 * sure there is no pending NAPI disable.
411 static inline int napi_schedule_prep(struct napi_struct *n)
413 return !napi_disable_pending(n) &&
414 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
418 * napi_schedule - schedule NAPI poll
421 * Schedule NAPI poll routine to be called if it is not already
424 static inline void napi_schedule(struct napi_struct *n)
426 if (napi_schedule_prep(n))
430 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
431 static inline int napi_reschedule(struct napi_struct *napi)
433 if (napi_schedule_prep(napi)) {
434 __napi_schedule(napi);
441 * napi_complete - NAPI processing complete
444 * Mark NAPI processing as complete.
446 extern void __napi_complete(struct napi_struct *n);
447 extern void napi_complete(struct napi_struct *n);
450 * napi_disable - prevent NAPI from scheduling
453 * Stop NAPI from being scheduled on this context.
454 * Waits till any outstanding processing completes.
456 static inline void napi_disable(struct napi_struct *n)
458 set_bit(NAPI_STATE_DISABLE, &n->state);
459 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
461 clear_bit(NAPI_STATE_DISABLE, &n->state);
465 * napi_enable - enable NAPI scheduling
468 * Resume NAPI from being scheduled on this context.
469 * Must be paired with napi_disable.
471 static inline void napi_enable(struct napi_struct *n)
473 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
474 smp_mb__before_clear_bit();
475 clear_bit(NAPI_STATE_SCHED, &n->state);
480 * napi_synchronize - wait until NAPI is not running
483 * Wait until NAPI is done being scheduled on this context.
484 * Waits till any outstanding processing completes but
485 * does not disable future activations.
487 static inline void napi_synchronize(const struct napi_struct *n)
489 while (test_bit(NAPI_STATE_SCHED, &n->state))
493 # define napi_synchronize(n) barrier()
496 enum netdev_queue_state_t {
498 __QUEUE_STATE_FROZEN,
499 #define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \
500 (1 << __QUEUE_STATE_FROZEN))
503 struct netdev_queue {
507 struct net_device *dev;
510 struct Qdisc *qdisc_sleeping;
514 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
520 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
523 * please use this field instead of dev->trans_start
525 unsigned long trans_start;
526 } ____cacheline_aligned_in_smp;
528 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
530 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
537 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
539 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
546 * This structure holds an RPS map which can be of variable length. The
547 * map is an array of CPUs.
554 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
557 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
558 * tail pointer for that CPU's input queue at the time of last enqueue, and
559 * a hardware filter index.
561 struct rps_dev_flow {
564 unsigned int last_qtail;
566 #define RPS_NO_FILTER 0xffff
569 * The rps_dev_flow_table structure contains a table of flow mappings.
571 struct rps_dev_flow_table {
574 struct work_struct free_work;
575 struct rps_dev_flow flows[0];
577 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
578 (_num * sizeof(struct rps_dev_flow)))
581 * The rps_sock_flow_table contains mappings of flows to the last CPU
582 * on which they were processed by the application (set in recvmsg).
584 struct rps_sock_flow_table {
588 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
589 (_num * sizeof(u16)))
591 #define RPS_NO_CPU 0xffff
593 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
597 unsigned int cpu, index = hash & table->mask;
599 /* We only give a hint, preemption can change cpu under us */
600 cpu = raw_smp_processor_id();
602 if (table->ents[index] != cpu)
603 table->ents[index] = cpu;
607 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
611 table->ents[hash & table->mask] = RPS_NO_CPU;
614 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
616 #ifdef CONFIG_RFS_ACCEL
617 extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
618 u32 flow_id, u16 filter_id);
621 /* This structure contains an instance of an RX queue. */
622 struct netdev_rx_queue {
623 struct rps_map __rcu *rps_map;
624 struct rps_dev_flow_table __rcu *rps_flow_table;
626 struct net_device *dev;
627 } ____cacheline_aligned_in_smp;
628 #endif /* CONFIG_RPS */
632 * This structure holds an XPS map which can be of variable length. The
633 * map is an array of queues.
637 unsigned int alloc_len;
641 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
642 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
646 * This structure holds all XPS maps for device. Maps are indexed by CPU.
648 struct xps_dev_maps {
650 struct xps_map __rcu *cpu_map[0];
652 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
653 (nr_cpu_ids * sizeof(struct xps_map *)))
654 #endif /* CONFIG_XPS */
656 #define TC_MAX_QUEUE 16
657 #define TC_BITMASK 15
658 /* HW offloaded queuing disciplines txq count and offset maps */
659 struct netdev_tc_txq {
665 * This structure defines the management hooks for network devices.
666 * The following hooks can be defined; unless noted otherwise, they are
667 * optional and can be filled with a null pointer.
669 * int (*ndo_init)(struct net_device *dev);
670 * This function is called once when network device is registered.
671 * The network device can use this to any late stage initializaton
672 * or semantic validattion. It can fail with an error code which will
673 * be propogated back to register_netdev
675 * void (*ndo_uninit)(struct net_device *dev);
676 * This function is called when device is unregistered or when registration
677 * fails. It is not called if init fails.
679 * int (*ndo_open)(struct net_device *dev);
680 * This function is called when network device transistions to the up
683 * int (*ndo_stop)(struct net_device *dev);
684 * This function is called when network device transistions to the down
687 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
688 * struct net_device *dev);
689 * Called when a packet needs to be transmitted.
690 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
691 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
692 * Required can not be NULL.
694 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
695 * Called to decide which queue to when device supports multiple
698 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
699 * This function is called to allow device receiver to make
700 * changes to configuration when multicast or promiscious is enabled.
702 * void (*ndo_set_rx_mode)(struct net_device *dev);
703 * This function is called device changes address list filtering.
705 * void (*ndo_set_multicast_list)(struct net_device *dev);
706 * This function is called when the multicast address list changes.
708 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
709 * This function is called when the Media Access Control address
710 * needs to be changed. If this interface is not defined, the
711 * mac address can not be changed.
713 * int (*ndo_validate_addr)(struct net_device *dev);
714 * Test if Media Access Control address is valid for the device.
716 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
717 * Called when a user request an ioctl which can't be handled by
718 * the generic interface code. If not defined ioctl's return
719 * not supported error code.
721 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
722 * Used to set network devices bus interface parameters. This interface
723 * is retained for legacy reason, new devices should use the bus
724 * interface (PCI) for low level management.
726 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
727 * Called when a user wants to change the Maximum Transfer Unit
728 * of a device. If not defined, any request to change MTU will
729 * will return an error.
731 * void (*ndo_tx_timeout)(struct net_device *dev);
732 * Callback uses when the transmitter has not made any progress
733 * for dev->watchdog ticks.
735 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
736 * struct rtnl_link_stats64 *storage);
737 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
738 * Called when a user wants to get the network device usage
739 * statistics. Drivers must do one of the following:
740 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
741 * rtnl_link_stats64 structure passed by the caller.
742 * 2. Define @ndo_get_stats to update a net_device_stats structure
743 * (which should normally be dev->stats) and return a pointer to
744 * it. The structure may be changed asynchronously only if each
745 * field is written atomically.
746 * 3. Update dev->stats asynchronously and atomically, and define
749 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
750 * If device support VLAN receive acceleration
751 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
752 * when vlan groups for the device changes. Note: grp is NULL
753 * if no vlan's groups are being used.
755 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
756 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
757 * this function is called when a VLAN id is registered.
759 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
760 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
761 * this function is called when a VLAN id is unregistered.
763 * void (*ndo_poll_controller)(struct net_device *dev);
765 * SR-IOV management functions.
766 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
767 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
768 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
769 * int (*ndo_get_vf_config)(struct net_device *dev,
770 * int vf, struct ifla_vf_info *ivf);
771 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
772 * struct nlattr *port[]);
773 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
774 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
775 * Called to setup 'tc' number of traffic classes in the net device. This
776 * is always called from the stack with the rtnl lock held and netif tx
777 * queues stopped. This allows the netdevice to perform queue management
781 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
782 * u16 rxq_index, u32 flow_id);
783 * Set hardware filter for RFS. rxq_index is the target queue index;
784 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
785 * Return the filter ID on success, or a negative error code.
787 #define HAVE_NET_DEVICE_OPS
788 struct net_device_ops {
789 int (*ndo_init)(struct net_device *dev);
790 void (*ndo_uninit)(struct net_device *dev);
791 int (*ndo_open)(struct net_device *dev);
792 int (*ndo_stop)(struct net_device *dev);
793 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
794 struct net_device *dev);
795 u16 (*ndo_select_queue)(struct net_device *dev,
796 struct sk_buff *skb);
797 void (*ndo_change_rx_flags)(struct net_device *dev,
799 void (*ndo_set_rx_mode)(struct net_device *dev);
800 void (*ndo_set_multicast_list)(struct net_device *dev);
801 int (*ndo_set_mac_address)(struct net_device *dev,
803 int (*ndo_validate_addr)(struct net_device *dev);
804 int (*ndo_do_ioctl)(struct net_device *dev,
805 struct ifreq *ifr, int cmd);
806 int (*ndo_set_config)(struct net_device *dev,
808 int (*ndo_change_mtu)(struct net_device *dev,
810 int (*ndo_neigh_setup)(struct net_device *dev,
811 struct neigh_parms *);
812 void (*ndo_tx_timeout) (struct net_device *dev);
814 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
815 struct rtnl_link_stats64 *storage);
816 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
818 void (*ndo_vlan_rx_register)(struct net_device *dev,
819 struct vlan_group *grp);
820 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
822 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
824 #ifdef CONFIG_NET_POLL_CONTROLLER
825 void (*ndo_poll_controller)(struct net_device *dev);
826 int (*ndo_netpoll_setup)(struct net_device *dev,
827 struct netpoll_info *info);
828 void (*ndo_netpoll_cleanup)(struct net_device *dev);
830 int (*ndo_set_vf_mac)(struct net_device *dev,
832 int (*ndo_set_vf_vlan)(struct net_device *dev,
833 int queue, u16 vlan, u8 qos);
834 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
836 int (*ndo_get_vf_config)(struct net_device *dev,
838 struct ifla_vf_info *ivf);
839 int (*ndo_set_vf_port)(struct net_device *dev,
841 struct nlattr *port[]);
842 int (*ndo_get_vf_port)(struct net_device *dev,
843 int vf, struct sk_buff *skb);
844 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
845 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
846 int (*ndo_fcoe_enable)(struct net_device *dev);
847 int (*ndo_fcoe_disable)(struct net_device *dev);
848 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
850 struct scatterlist *sgl,
852 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
854 #define NETDEV_FCOE_WWNN 0
855 #define NETDEV_FCOE_WWPN 1
856 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
859 #ifdef CONFIG_RFS_ACCEL
860 int (*ndo_rx_flow_steer)(struct net_device *dev,
861 const struct sk_buff *skb,
868 * The DEVICE structure.
869 * Actually, this whole structure is a big mistake. It mixes I/O
870 * data with strictly "high-level" data, and it has to know about
871 * almost every data structure used in the INET module.
873 * FIXME: cleanup struct net_device such that network protocol info
880 * This is the first field of the "visible" part of this structure
881 * (i.e. as seen by users in the "Space.c" file). It is the name
886 struct pm_qos_request_list pm_qos_req;
888 /* device name hash chain */
889 struct hlist_node name_hlist;
894 * I/O specific fields
895 * FIXME: Merge these and struct ifmap into one
897 unsigned long mem_end; /* shared mem end */
898 unsigned long mem_start; /* shared mem start */
899 unsigned long base_addr; /* device I/O address */
900 unsigned int irq; /* device IRQ number */
903 * Some hardware also needs these fields, but they are not
904 * part of the usual set specified in Space.c.
907 unsigned char if_port; /* Selectable AUI, TP,..*/
908 unsigned char dma; /* DMA channel */
912 struct list_head dev_list;
913 struct list_head napi_list;
914 struct list_head unreg_list;
916 /* Net device features */
919 /* VLAN feature mask */
922 #define NETIF_F_SG 1 /* Scatter/gather IO. */
923 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
924 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
925 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
926 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
927 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
928 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
929 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
930 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
931 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
932 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
933 #define NETIF_F_GSO 2048 /* Enable software GSO. */
934 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
935 /* do not use LLTX in new drivers */
936 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
937 #define NETIF_F_GRO 16384 /* Generic receive offload */
938 #define NETIF_F_LRO 32768 /* large receive offload */
940 /* the GSO_MASK reserves bits 16 through 23 */
941 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
942 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
943 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
944 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
945 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
947 /* Segmentation offload features */
948 #define NETIF_F_GSO_SHIFT 16
949 #define NETIF_F_GSO_MASK 0x00ff0000
950 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
951 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
952 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
953 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
954 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
955 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
957 /* List of features with software fallbacks. */
958 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
959 NETIF_F_TSO6 | NETIF_F_UFO)
962 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
963 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
964 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
965 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
968 * If one device supports one of these features, then enable them
969 * for all in netdev_increment_features.
971 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
972 NETIF_F_SG | NETIF_F_HIGHDMA | \
975 /* Interface index. Unique device identifier */
979 struct net_device_stats stats;
980 atomic_long_t rx_dropped; /* dropped packets by core network
981 * Do not use this in drivers.
984 #ifdef CONFIG_WIRELESS_EXT
985 /* List of functions to handle Wireless Extensions (instead of ioctl).
986 * See <net/iw_handler.h> for details. Jean II */
987 const struct iw_handler_def * wireless_handlers;
988 /* Instance data managed by the core of Wireless Extensions. */
989 struct iw_public_data * wireless_data;
991 /* Management operations */
992 const struct net_device_ops *netdev_ops;
993 const struct ethtool_ops *ethtool_ops;
995 /* Hardware header description */
996 const struct header_ops *header_ops;
998 unsigned int flags; /* interface flags (a la BSD) */
999 unsigned short gflags;
1000 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
1001 unsigned short padded; /* How much padding added by alloc_netdev() */
1003 unsigned char operstate; /* RFC2863 operstate */
1004 unsigned char link_mode; /* mapping policy to operstate */
1006 unsigned int mtu; /* interface MTU value */
1007 unsigned short type; /* interface hardware type */
1008 unsigned short hard_header_len; /* hardware hdr length */
1010 /* extra head- and tailroom the hardware may need, but not in all cases
1011 * can this be guaranteed, especially tailroom. Some cases also use
1012 * LL_MAX_HEADER instead to allocate the skb.
1014 unsigned short needed_headroom;
1015 unsigned short needed_tailroom;
1017 /* Interface address info. */
1018 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1019 unsigned char addr_assign_type; /* hw address assignment type */
1020 unsigned char addr_len; /* hardware address length */
1021 unsigned short dev_id; /* for shared network cards */
1023 spinlock_t addr_list_lock;
1024 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1025 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1027 unsigned int promiscuity;
1028 unsigned int allmulti;
1031 /* Protocol specific pointers */
1033 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1034 struct vlan_group __rcu *vlgrp; /* VLAN group */
1036 #ifdef CONFIG_NET_DSA
1037 void *dsa_ptr; /* dsa specific data */
1039 void *atalk_ptr; /* AppleTalk link */
1040 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1041 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1042 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1043 void *ec_ptr; /* Econet specific data */
1044 void *ax25_ptr; /* AX.25 specific data */
1045 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1046 assign before registering */
1049 * Cache lines mostly used on receive path (including eth_type_trans())
1051 unsigned long last_rx; /* Time of last Rx
1052 * This should not be set in
1053 * drivers, unless really needed,
1054 * because network stack (bonding)
1055 * use it if/when necessary, to
1056 * avoid dirtying this cache line.
1059 struct net_device *master; /* Pointer to master device of a group,
1060 * which this device is member of.
1063 /* Interface address info used in eth_type_trans() */
1064 unsigned char *dev_addr; /* hw address, (before bcast
1065 because most packets are
1068 struct netdev_hw_addr_list dev_addrs; /* list of device
1071 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1074 struct kset *queues_kset;
1076 struct netdev_rx_queue *_rx;
1078 /* Number of RX queues allocated at register_netdev() time */
1079 unsigned int num_rx_queues;
1081 /* Number of RX queues currently active in device */
1082 unsigned int real_num_rx_queues;
1084 #ifdef CONFIG_RFS_ACCEL
1085 /* CPU reverse-mapping for RX completion interrupts, indexed
1086 * by RX queue number. Assigned by driver. This must only be
1087 * set if the ndo_rx_flow_steer operation is defined. */
1088 struct cpu_rmap *rx_cpu_rmap;
1092 rx_handler_func_t __rcu *rx_handler;
1093 void __rcu *rx_handler_data;
1095 struct netdev_queue __rcu *ingress_queue;
1098 * Cache lines mostly used on transmit path
1100 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1102 /* Number of TX queues allocated at alloc_netdev_mq() time */
1103 unsigned int num_tx_queues;
1105 /* Number of TX queues currently active in device */
1106 unsigned int real_num_tx_queues;
1108 /* root qdisc from userspace point of view */
1109 struct Qdisc *qdisc;
1111 unsigned long tx_queue_len; /* Max frames per queue allowed */
1112 spinlock_t tx_global_lock;
1115 struct xps_dev_maps __rcu *xps_maps;
1118 /* These may be needed for future network-power-down code. */
1121 * trans_start here is expensive for high speed devices on SMP,
1122 * please use netdev_queue->trans_start instead.
1124 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1126 int watchdog_timeo; /* used by dev_watchdog() */
1127 struct timer_list watchdog_timer;
1129 /* Number of references to this device */
1130 int __percpu *pcpu_refcnt;
1132 /* delayed register/unregister */
1133 struct list_head todo_list;
1134 /* device index hash chain */
1135 struct hlist_node index_hlist;
1137 struct list_head link_watch_list;
1139 /* register/unregister state machine */
1140 enum { NETREG_UNINITIALIZED=0,
1141 NETREG_REGISTERED, /* completed register_netdevice */
1142 NETREG_UNREGISTERING, /* called unregister_netdevice */
1143 NETREG_UNREGISTERED, /* completed unregister todo */
1144 NETREG_RELEASED, /* called free_netdev */
1145 NETREG_DUMMY, /* dummy device for NAPI poll */
1149 RTNL_LINK_INITIALIZED,
1150 RTNL_LINK_INITIALIZING,
1151 } rtnl_link_state:16;
1153 /* Called from unregister, can be used to call free_netdev */
1154 void (*destructor)(struct net_device *dev);
1156 #ifdef CONFIG_NETPOLL
1157 struct netpoll_info *npinfo;
1160 #ifdef CONFIG_NET_NS
1161 /* Network namespace this network device is inside */
1165 /* mid-layer private */
1168 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1169 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1170 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1173 struct garp_port __rcu *garp_port;
1175 /* class/net/name entry */
1177 /* space for optional device, statistics, and wireless sysfs groups */
1178 const struct attribute_group *sysfs_groups[4];
1180 /* rtnetlink link ops */
1181 const struct rtnl_link_ops *rtnl_link_ops;
1183 /* for setting kernel sock attribute on TCP connection setup */
1184 #define GSO_MAX_SIZE 65536
1185 unsigned int gso_max_size;
1188 /* Data Center Bridging netlink ops */
1189 const struct dcbnl_rtnl_ops *dcbnl_ops;
1192 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1193 u8 prio_tc_map[TC_BITMASK + 1];
1195 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1196 /* max exchange id for FCoE LRO by ddp */
1197 unsigned int fcoe_ddp_xid;
1199 /* n-tuple filter list attached to this device */
1200 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1202 /* phy device may attach itself for hardware timestamping */
1203 struct phy_device *phydev;
1205 /* group the device belongs to */
1208 #define to_net_dev(d) container_of(d, struct net_device, dev)
1210 #define NETDEV_ALIGN 32
1213 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1215 return dev->prio_tc_map[prio & TC_BITMASK];
1219 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1221 if (tc >= dev->num_tc)
1224 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1229 void netdev_reset_tc(struct net_device *dev)
1232 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1233 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1237 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1239 if (tc >= dev->num_tc)
1242 dev->tc_to_txq[tc].count = count;
1243 dev->tc_to_txq[tc].offset = offset;
1248 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1250 if (num_tc > TC_MAX_QUEUE)
1253 dev->num_tc = num_tc;
1258 int netdev_get_num_tc(struct net_device *dev)
1264 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1267 return &dev->_tx[index];
1270 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1271 void (*f)(struct net_device *,
1272 struct netdev_queue *,
1278 for (i = 0; i < dev->num_tx_queues; i++)
1279 f(dev, &dev->_tx[i], arg);
1283 * Net namespace inlines
1286 struct net *dev_net(const struct net_device *dev)
1288 return read_pnet(&dev->nd_net);
1292 void dev_net_set(struct net_device *dev, struct net *net)
1294 #ifdef CONFIG_NET_NS
1295 release_net(dev->nd_net);
1296 dev->nd_net = hold_net(net);
1300 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1302 #ifdef CONFIG_NET_DSA_TAG_DSA
1303 if (dev->dsa_ptr != NULL)
1304 return dsa_uses_dsa_tags(dev->dsa_ptr);
1310 #ifndef CONFIG_NET_NS
1311 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1315 #else /* CONFIG_NET_NS */
1316 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1319 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1321 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1322 if (dev->dsa_ptr != NULL)
1323 return dsa_uses_trailer_tags(dev->dsa_ptr);
1330 * netdev_priv - access network device private data
1331 * @dev: network device
1333 * Get network device private data
1335 static inline void *netdev_priv(const struct net_device *dev)
1337 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1340 /* Set the sysfs physical device reference for the network logical device
1341 * if set prior to registration will cause a symlink during initialization.
1343 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1345 /* Set the sysfs device type for the network logical device to allow
1346 * fin grained indentification of different network device types. For
1347 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1349 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1352 * netif_napi_add - initialize a napi context
1353 * @dev: network device
1354 * @napi: napi context
1355 * @poll: polling function
1356 * @weight: default weight
1358 * netif_napi_add() must be used to initialize a napi context prior to calling
1359 * *any* of the other napi related functions.
1361 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1362 int (*poll)(struct napi_struct *, int), int weight);
1365 * netif_napi_del - remove a napi context
1366 * @napi: napi context
1368 * netif_napi_del() removes a napi context from the network device napi list
1370 void netif_napi_del(struct napi_struct *napi);
1372 struct napi_gro_cb {
1373 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1376 /* Length of frag0. */
1377 unsigned int frag0_len;
1379 /* This indicates where we are processing relative to skb->data. */
1382 /* This is non-zero if the packet may be of the same flow. */
1385 /* This is non-zero if the packet cannot be merged with the new skb. */
1388 /* Number of segments aggregated. */
1395 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1397 struct packet_type {
1398 __be16 type; /* This is really htons(ether_type). */
1399 struct net_device *dev; /* NULL is wildcarded here */
1400 int (*func) (struct sk_buff *,
1401 struct net_device *,
1402 struct packet_type *,
1403 struct net_device *);
1404 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1406 int (*gso_send_check)(struct sk_buff *skb);
1407 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1408 struct sk_buff *skb);
1409 int (*gro_complete)(struct sk_buff *skb);
1410 void *af_packet_priv;
1411 struct list_head list;
1414 #include <linux/interrupt.h>
1415 #include <linux/notifier.h>
1417 extern rwlock_t dev_base_lock; /* Device list lock */
1420 #define for_each_netdev(net, d) \
1421 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1422 #define for_each_netdev_reverse(net, d) \
1423 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1424 #define for_each_netdev_rcu(net, d) \
1425 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1426 #define for_each_netdev_safe(net, d, n) \
1427 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1428 #define for_each_netdev_continue(net, d) \
1429 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1430 #define for_each_netdev_continue_rcu(net, d) \
1431 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1432 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1434 static inline struct net_device *next_net_device(struct net_device *dev)
1436 struct list_head *lh;
1440 lh = dev->dev_list.next;
1441 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1444 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1446 struct list_head *lh;
1450 lh = rcu_dereference(dev->dev_list.next);
1451 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1454 static inline struct net_device *first_net_device(struct net *net)
1456 return list_empty(&net->dev_base_head) ? NULL :
1457 net_device_entry(net->dev_base_head.next);
1460 extern int netdev_boot_setup_check(struct net_device *dev);
1461 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1462 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1463 const char *hwaddr);
1464 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1465 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1466 extern void dev_add_pack(struct packet_type *pt);
1467 extern void dev_remove_pack(struct packet_type *pt);
1468 extern void __dev_remove_pack(struct packet_type *pt);
1470 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1471 unsigned short mask);
1472 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1473 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1474 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1475 extern int dev_alloc_name(struct net_device *dev, const char *name);
1476 extern int dev_open(struct net_device *dev);
1477 extern int dev_close(struct net_device *dev);
1478 extern void dev_disable_lro(struct net_device *dev);
1479 extern int dev_queue_xmit(struct sk_buff *skb);
1480 extern int register_netdevice(struct net_device *dev);
1481 extern void unregister_netdevice_queue(struct net_device *dev,
1482 struct list_head *head);
1483 extern void unregister_netdevice_many(struct list_head *head);
1484 static inline void unregister_netdevice(struct net_device *dev)
1486 unregister_netdevice_queue(dev, NULL);
1489 extern int netdev_refcnt_read(const struct net_device *dev);
1490 extern void free_netdev(struct net_device *dev);
1491 extern void synchronize_net(void);
1492 extern int register_netdevice_notifier(struct notifier_block *nb);
1493 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1494 extern int init_dummy_netdev(struct net_device *dev);
1495 extern void netdev_resync_ops(struct net_device *dev);
1497 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1498 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1499 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1500 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1501 extern int dev_restart(struct net_device *dev);
1502 #ifdef CONFIG_NETPOLL_TRAP
1503 extern int netpoll_trap(void);
1505 extern int skb_gro_receive(struct sk_buff **head,
1506 struct sk_buff *skb);
1507 extern void skb_gro_reset_offset(struct sk_buff *skb);
1509 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1511 return NAPI_GRO_CB(skb)->data_offset;
1514 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1516 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1519 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1521 NAPI_GRO_CB(skb)->data_offset += len;
1524 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1525 unsigned int offset)
1527 return NAPI_GRO_CB(skb)->frag0 + offset;
1530 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1532 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1535 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1536 unsigned int offset)
1538 NAPI_GRO_CB(skb)->frag0 = NULL;
1539 NAPI_GRO_CB(skb)->frag0_len = 0;
1540 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1543 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1545 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1548 static inline void *skb_gro_network_header(struct sk_buff *skb)
1550 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1551 skb_network_offset(skb);
1554 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1555 unsigned short type,
1556 const void *daddr, const void *saddr,
1559 if (!dev->header_ops || !dev->header_ops->create)
1562 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1565 static inline int dev_parse_header(const struct sk_buff *skb,
1566 unsigned char *haddr)
1568 const struct net_device *dev = skb->dev;
1570 if (!dev->header_ops || !dev->header_ops->parse)
1572 return dev->header_ops->parse(skb, haddr);
1575 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1576 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1577 static inline int unregister_gifconf(unsigned int family)
1579 return register_gifconf(family, NULL);
1583 * Incoming packets are placed on per-cpu queues
1585 struct softnet_data {
1586 struct Qdisc *output_queue;
1587 struct Qdisc **output_queue_tailp;
1588 struct list_head poll_list;
1589 struct sk_buff *completion_queue;
1590 struct sk_buff_head process_queue;
1593 unsigned int processed;
1594 unsigned int time_squeeze;
1595 unsigned int cpu_collision;
1596 unsigned int received_rps;
1599 struct softnet_data *rps_ipi_list;
1601 /* Elements below can be accessed between CPUs for RPS */
1602 struct call_single_data csd ____cacheline_aligned_in_smp;
1603 struct softnet_data *rps_ipi_next;
1605 unsigned int input_queue_head;
1606 unsigned int input_queue_tail;
1609 struct sk_buff_head input_pkt_queue;
1610 struct napi_struct backlog;
1613 static inline void input_queue_head_incr(struct softnet_data *sd)
1616 sd->input_queue_head++;
1620 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1621 unsigned int *qtail)
1624 *qtail = ++sd->input_queue_tail;
1628 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1630 #define HAVE_NETIF_QUEUE
1632 extern void __netif_schedule(struct Qdisc *q);
1634 static inline void netif_schedule_queue(struct netdev_queue *txq)
1636 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1637 __netif_schedule(txq->qdisc);
1640 static inline void netif_tx_schedule_all(struct net_device *dev)
1644 for (i = 0; i < dev->num_tx_queues; i++)
1645 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1648 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1650 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1654 * netif_start_queue - allow transmit
1655 * @dev: network device
1657 * Allow upper layers to call the device hard_start_xmit routine.
1659 static inline void netif_start_queue(struct net_device *dev)
1661 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1664 static inline void netif_tx_start_all_queues(struct net_device *dev)
1668 for (i = 0; i < dev->num_tx_queues; i++) {
1669 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1670 netif_tx_start_queue(txq);
1674 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1676 #ifdef CONFIG_NETPOLL_TRAP
1677 if (netpoll_trap()) {
1678 netif_tx_start_queue(dev_queue);
1682 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1683 __netif_schedule(dev_queue->qdisc);
1687 * netif_wake_queue - restart transmit
1688 * @dev: network device
1690 * Allow upper layers to call the device hard_start_xmit routine.
1691 * Used for flow control when transmit resources are available.
1693 static inline void netif_wake_queue(struct net_device *dev)
1695 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1698 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1702 for (i = 0; i < dev->num_tx_queues; i++) {
1703 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1704 netif_tx_wake_queue(txq);
1708 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1710 if (WARN_ON(!dev_queue)) {
1711 printk(KERN_INFO "netif_stop_queue() cannot be called before "
1712 "register_netdev()");
1715 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1719 * netif_stop_queue - stop transmitted packets
1720 * @dev: network device
1722 * Stop upper layers calling the device hard_start_xmit routine.
1723 * Used for flow control when transmit resources are unavailable.
1725 static inline void netif_stop_queue(struct net_device *dev)
1727 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1730 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1734 for (i = 0; i < dev->num_tx_queues; i++) {
1735 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1736 netif_tx_stop_queue(txq);
1740 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1742 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1746 * netif_queue_stopped - test if transmit queue is flowblocked
1747 * @dev: network device
1749 * Test if transmit queue on device is currently unable to send.
1751 static inline int netif_queue_stopped(const struct net_device *dev)
1753 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1756 static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
1758 return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
1762 * netif_running - test if up
1763 * @dev: network device
1765 * Test if the device has been brought up.
1767 static inline int netif_running(const struct net_device *dev)
1769 return test_bit(__LINK_STATE_START, &dev->state);
1773 * Routines to manage the subqueues on a device. We only need start
1774 * stop, and a check if it's stopped. All other device management is
1775 * done at the overall netdevice level.
1776 * Also test the device if we're multiqueue.
1780 * netif_start_subqueue - allow sending packets on subqueue
1781 * @dev: network device
1782 * @queue_index: sub queue index
1784 * Start individual transmit queue of a device with multiple transmit queues.
1786 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1788 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1790 netif_tx_start_queue(txq);
1794 * netif_stop_subqueue - stop sending packets on subqueue
1795 * @dev: network device
1796 * @queue_index: sub queue index
1798 * Stop individual transmit queue of a device with multiple transmit queues.
1800 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1802 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1803 #ifdef CONFIG_NETPOLL_TRAP
1807 netif_tx_stop_queue(txq);
1811 * netif_subqueue_stopped - test status of subqueue
1812 * @dev: network device
1813 * @queue_index: sub queue index
1815 * Check individual transmit queue of a device with multiple transmit queues.
1817 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1820 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1822 return netif_tx_queue_stopped(txq);
1825 static inline int netif_subqueue_stopped(const struct net_device *dev,
1826 struct sk_buff *skb)
1828 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1832 * netif_wake_subqueue - allow sending packets on subqueue
1833 * @dev: network device
1834 * @queue_index: sub queue index
1836 * Resume individual transmit queue of a device with multiple transmit queues.
1838 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1840 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1841 #ifdef CONFIG_NETPOLL_TRAP
1845 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1846 __netif_schedule(txq->qdisc);
1850 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
1851 * as a distribution range limit for the returned value.
1853 static inline u16 skb_tx_hash(const struct net_device *dev,
1854 const struct sk_buff *skb)
1856 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
1860 * netif_is_multiqueue - test if device has multiple transmit queues
1861 * @dev: network device
1863 * Check if device has multiple transmit queues
1865 static inline int netif_is_multiqueue(const struct net_device *dev)
1867 return dev->num_tx_queues > 1;
1870 extern int netif_set_real_num_tx_queues(struct net_device *dev,
1874 extern int netif_set_real_num_rx_queues(struct net_device *dev,
1877 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
1884 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
1885 const struct net_device *from_dev)
1887 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
1889 return netif_set_real_num_rx_queues(to_dev,
1890 from_dev->real_num_rx_queues);
1896 /* Use this variant when it is known for sure that it
1897 * is executing from hardware interrupt context or with hardware interrupts
1900 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1902 /* Use this variant in places where it could be invoked
1903 * from either hardware interrupt or other context, with hardware interrupts
1904 * either disabled or enabled.
1906 extern void dev_kfree_skb_any(struct sk_buff *skb);
1908 #define HAVE_NETIF_RX 1
1909 extern int netif_rx(struct sk_buff *skb);
1910 extern int netif_rx_ni(struct sk_buff *skb);
1911 #define HAVE_NETIF_RECEIVE_SKB 1
1912 extern int netif_receive_skb(struct sk_buff *skb);
1913 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1914 struct sk_buff *skb);
1915 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1916 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1917 struct sk_buff *skb);
1918 extern void napi_gro_flush(struct napi_struct *napi);
1919 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1920 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1921 struct sk_buff *skb,
1923 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1924 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1926 static inline void napi_free_frags(struct napi_struct *napi)
1928 kfree_skb(napi->skb);
1932 extern int netdev_rx_handler_register(struct net_device *dev,
1933 rx_handler_func_t *rx_handler,
1934 void *rx_handler_data);
1935 extern void netdev_rx_handler_unregister(struct net_device *dev);
1937 extern int dev_valid_name(const char *name);
1938 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1939 extern int dev_ethtool(struct net *net, struct ifreq *);
1940 extern unsigned dev_get_flags(const struct net_device *);
1941 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1942 extern int dev_change_flags(struct net_device *, unsigned);
1943 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1944 extern int dev_change_name(struct net_device *, const char *);
1945 extern int dev_set_alias(struct net_device *, const char *, size_t);
1946 extern int dev_change_net_namespace(struct net_device *,
1947 struct net *, const char *);
1948 extern int dev_set_mtu(struct net_device *, int);
1949 extern void dev_set_group(struct net_device *, int);
1950 extern int dev_set_mac_address(struct net_device *,
1952 extern int dev_hard_start_xmit(struct sk_buff *skb,
1953 struct net_device *dev,
1954 struct netdev_queue *txq);
1955 extern int dev_forward_skb(struct net_device *dev,
1956 struct sk_buff *skb);
1958 extern int netdev_budget;
1960 /* Called by rtnetlink.c:rtnl_unlock() */
1961 extern void netdev_run_todo(void);
1964 * dev_put - release reference to device
1965 * @dev: network device
1967 * Release reference to device to allow it to be freed.
1969 static inline void dev_put(struct net_device *dev)
1971 irqsafe_cpu_dec(*dev->pcpu_refcnt);
1975 * dev_hold - get reference to device
1976 * @dev: network device
1978 * Hold reference to device to keep it from being freed.
1980 static inline void dev_hold(struct net_device *dev)
1982 irqsafe_cpu_inc(*dev->pcpu_refcnt);
1985 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1986 * and _off may be called from IRQ context, but it is caller
1987 * who is responsible for serialization of these calls.
1989 * The name carrier is inappropriate, these functions should really be
1990 * called netif_lowerlayer_*() because they represent the state of any
1991 * kind of lower layer not just hardware media.
1994 extern void linkwatch_fire_event(struct net_device *dev);
1995 extern void linkwatch_forget_dev(struct net_device *dev);
1998 * netif_carrier_ok - test if carrier present
1999 * @dev: network device
2001 * Check if carrier is present on device
2003 static inline int netif_carrier_ok(const struct net_device *dev)
2005 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2008 extern unsigned long dev_trans_start(struct net_device *dev);
2010 extern void __netdev_watchdog_up(struct net_device *dev);
2012 extern void netif_carrier_on(struct net_device *dev);
2014 extern void netif_carrier_off(struct net_device *dev);
2016 extern void netif_notify_peers(struct net_device *dev);
2019 * netif_dormant_on - mark device as dormant.
2020 * @dev: network device
2022 * Mark device as dormant (as per RFC2863).
2024 * The dormant state indicates that the relevant interface is not
2025 * actually in a condition to pass packets (i.e., it is not 'up') but is
2026 * in a "pending" state, waiting for some external event. For "on-
2027 * demand" interfaces, this new state identifies the situation where the
2028 * interface is waiting for events to place it in the up state.
2031 static inline void netif_dormant_on(struct net_device *dev)
2033 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2034 linkwatch_fire_event(dev);
2038 * netif_dormant_off - set device as not dormant.
2039 * @dev: network device
2041 * Device is not in dormant state.
2043 static inline void netif_dormant_off(struct net_device *dev)
2045 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2046 linkwatch_fire_event(dev);
2050 * netif_dormant - test if carrier present
2051 * @dev: network device
2053 * Check if carrier is present on device
2055 static inline int netif_dormant(const struct net_device *dev)
2057 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2062 * netif_oper_up - test if device is operational
2063 * @dev: network device
2065 * Check if carrier is operational
2067 static inline int netif_oper_up(const struct net_device *dev)
2069 return (dev->operstate == IF_OPER_UP ||
2070 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2074 * netif_device_present - is device available or removed
2075 * @dev: network device
2077 * Check if device has not been removed from system.
2079 static inline int netif_device_present(struct net_device *dev)
2081 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2084 extern void netif_device_detach(struct net_device *dev);
2086 extern void netif_device_attach(struct net_device *dev);
2089 * Network interface message level settings
2091 #define HAVE_NETIF_MSG 1
2094 NETIF_MSG_DRV = 0x0001,
2095 NETIF_MSG_PROBE = 0x0002,
2096 NETIF_MSG_LINK = 0x0004,
2097 NETIF_MSG_TIMER = 0x0008,
2098 NETIF_MSG_IFDOWN = 0x0010,
2099 NETIF_MSG_IFUP = 0x0020,
2100 NETIF_MSG_RX_ERR = 0x0040,
2101 NETIF_MSG_TX_ERR = 0x0080,
2102 NETIF_MSG_TX_QUEUED = 0x0100,
2103 NETIF_MSG_INTR = 0x0200,
2104 NETIF_MSG_TX_DONE = 0x0400,
2105 NETIF_MSG_RX_STATUS = 0x0800,
2106 NETIF_MSG_PKTDATA = 0x1000,
2107 NETIF_MSG_HW = 0x2000,
2108 NETIF_MSG_WOL = 0x4000,
2111 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2112 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2113 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2114 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2115 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2116 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2117 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2118 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2119 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2120 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2121 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2122 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2123 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2124 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2125 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2127 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2130 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2131 return default_msg_enable_bits;
2132 if (debug_value == 0) /* no output */
2134 /* set low N bits */
2135 return (1 << debug_value) - 1;
2138 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2140 spin_lock(&txq->_xmit_lock);
2141 txq->xmit_lock_owner = cpu;
2144 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2146 spin_lock_bh(&txq->_xmit_lock);
2147 txq->xmit_lock_owner = smp_processor_id();
2150 static inline int __netif_tx_trylock(struct netdev_queue *txq)
2152 int ok = spin_trylock(&txq->_xmit_lock);
2154 txq->xmit_lock_owner = smp_processor_id();
2158 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2160 txq->xmit_lock_owner = -1;
2161 spin_unlock(&txq->_xmit_lock);
2164 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2166 txq->xmit_lock_owner = -1;
2167 spin_unlock_bh(&txq->_xmit_lock);
2170 static inline void txq_trans_update(struct netdev_queue *txq)
2172 if (txq->xmit_lock_owner != -1)
2173 txq->trans_start = jiffies;
2177 * netif_tx_lock - grab network device transmit lock
2178 * @dev: network device
2180 * Get network device transmit lock
2182 static inline void netif_tx_lock(struct net_device *dev)
2187 spin_lock(&dev->tx_global_lock);
2188 cpu = smp_processor_id();
2189 for (i = 0; i < dev->num_tx_queues; i++) {
2190 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2192 /* We are the only thread of execution doing a
2193 * freeze, but we have to grab the _xmit_lock in
2194 * order to synchronize with threads which are in
2195 * the ->hard_start_xmit() handler and already
2196 * checked the frozen bit.
2198 __netif_tx_lock(txq, cpu);
2199 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2200 __netif_tx_unlock(txq);
2204 static inline void netif_tx_lock_bh(struct net_device *dev)
2210 static inline void netif_tx_unlock(struct net_device *dev)
2214 for (i = 0; i < dev->num_tx_queues; i++) {
2215 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2217 /* No need to grab the _xmit_lock here. If the
2218 * queue is not stopped for another reason, we
2221 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2222 netif_schedule_queue(txq);
2224 spin_unlock(&dev->tx_global_lock);
2227 static inline void netif_tx_unlock_bh(struct net_device *dev)
2229 netif_tx_unlock(dev);
2233 #define HARD_TX_LOCK(dev, txq, cpu) { \
2234 if ((dev->features & NETIF_F_LLTX) == 0) { \
2235 __netif_tx_lock(txq, cpu); \
2239 #define HARD_TX_UNLOCK(dev, txq) { \
2240 if ((dev->features & NETIF_F_LLTX) == 0) { \
2241 __netif_tx_unlock(txq); \
2245 static inline void netif_tx_disable(struct net_device *dev)
2251 cpu = smp_processor_id();
2252 for (i = 0; i < dev->num_tx_queues; i++) {
2253 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2255 __netif_tx_lock(txq, cpu);
2256 netif_tx_stop_queue(txq);
2257 __netif_tx_unlock(txq);
2262 static inline void netif_addr_lock(struct net_device *dev)
2264 spin_lock(&dev->addr_list_lock);
2267 static inline void netif_addr_lock_bh(struct net_device *dev)
2269 spin_lock_bh(&dev->addr_list_lock);
2272 static inline void netif_addr_unlock(struct net_device *dev)
2274 spin_unlock(&dev->addr_list_lock);
2277 static inline void netif_addr_unlock_bh(struct net_device *dev)
2279 spin_unlock_bh(&dev->addr_list_lock);
2283 * dev_addrs walker. Should be used only for read access. Call with
2284 * rcu_read_lock held.
2286 #define for_each_dev_addr(dev, ha) \
2287 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2289 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2291 extern void ether_setup(struct net_device *dev);
2293 /* Support for loadable net-drivers */
2294 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2295 void (*setup)(struct net_device *),
2296 unsigned int txqs, unsigned int rxqs);
2297 #define alloc_netdev(sizeof_priv, name, setup) \
2298 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2300 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2301 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2303 extern int register_netdev(struct net_device *dev);
2304 extern void unregister_netdev(struct net_device *dev);
2306 /* General hardware address lists handling functions */
2307 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2308 struct netdev_hw_addr_list *from_list,
2309 int addr_len, unsigned char addr_type);
2310 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2311 struct netdev_hw_addr_list *from_list,
2312 int addr_len, unsigned char addr_type);
2313 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2314 struct netdev_hw_addr_list *from_list,
2316 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2317 struct netdev_hw_addr_list *from_list,
2319 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2320 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2322 /* Functions used for device addresses handling */
2323 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2324 unsigned char addr_type);
2325 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2326 unsigned char addr_type);
2327 extern int dev_addr_add_multiple(struct net_device *to_dev,
2328 struct net_device *from_dev,
2329 unsigned char addr_type);
2330 extern int dev_addr_del_multiple(struct net_device *to_dev,
2331 struct net_device *from_dev,
2332 unsigned char addr_type);
2333 extern void dev_addr_flush(struct net_device *dev);
2334 extern int dev_addr_init(struct net_device *dev);
2336 /* Functions used for unicast addresses handling */
2337 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2338 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2339 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2340 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2341 extern void dev_uc_flush(struct net_device *dev);
2342 extern void dev_uc_init(struct net_device *dev);
2344 /* Functions used for multicast addresses handling */
2345 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2346 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2347 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2348 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2349 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2350 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2351 extern void dev_mc_flush(struct net_device *dev);
2352 extern void dev_mc_init(struct net_device *dev);
2354 /* Functions used for secondary unicast and multicast support */
2355 extern void dev_set_rx_mode(struct net_device *dev);
2356 extern void __dev_set_rx_mode(struct net_device *dev);
2357 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2358 extern int dev_set_allmulti(struct net_device *dev, int inc);
2359 extern void netdev_state_change(struct net_device *dev);
2360 extern int netdev_bonding_change(struct net_device *dev,
2361 unsigned long event);
2362 extern void netdev_features_change(struct net_device *dev);
2363 /* Load a device via the kmod */
2364 extern void dev_load(struct net *net, const char *name);
2365 extern void dev_mcast_init(void);
2366 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2367 struct rtnl_link_stats64 *storage);
2369 extern int netdev_max_backlog;
2370 extern int netdev_tstamp_prequeue;
2371 extern int weight_p;
2372 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2373 extern int skb_checksum_help(struct sk_buff *skb);
2374 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features);
2376 extern void netdev_rx_csum_fault(struct net_device *dev);
2378 static inline void netdev_rx_csum_fault(struct net_device *dev)
2382 /* rx skb timestamps */
2383 extern void net_enable_timestamp(void);
2384 extern void net_disable_timestamp(void);
2386 #ifdef CONFIG_PROC_FS
2387 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2388 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2389 extern void dev_seq_stop(struct seq_file *seq, void *v);
2392 extern int netdev_class_create_file(struct class_attribute *class_attr);
2393 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2395 extern struct kobj_ns_type_operations net_ns_type_operations;
2397 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2399 extern void linkwatch_run_queue(void);
2401 u32 netdev_increment_features(u32 all, u32 one, u32 mask);
2402 u32 netdev_fix_features(u32 features, const char *name);
2404 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2405 struct net_device *dev);
2407 u32 netif_skb_features(struct sk_buff *skb);
2409 static inline int net_gso_ok(u32 features, int gso_type)
2411 int feature = gso_type << NETIF_F_GSO_SHIFT;
2412 return (features & feature) == feature;
2415 static inline int skb_gso_ok(struct sk_buff *skb, u32 features)
2417 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2418 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2421 static inline int netif_needs_gso(struct sk_buff *skb, int features)
2423 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2424 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2427 static inline void netif_set_gso_max_size(struct net_device *dev,
2430 dev->gso_max_size = size;
2433 extern int __skb_bond_should_drop(struct sk_buff *skb,
2434 struct net_device *master);
2436 static inline int skb_bond_should_drop(struct sk_buff *skb,
2437 struct net_device *master)
2440 return __skb_bond_should_drop(skb, master);
2444 extern struct pernet_operations __net_initdata loopback_net_ops;
2446 static inline int dev_ethtool_get_settings(struct net_device *dev,
2447 struct ethtool_cmd *cmd)
2449 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2451 return dev->ethtool_ops->get_settings(dev, cmd);
2454 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2456 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2458 return dev->ethtool_ops->get_rx_csum(dev);
2461 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2463 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2465 return dev->ethtool_ops->get_flags(dev);
2468 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2470 /* netdev_printk helpers, similar to dev_printk */
2472 static inline const char *netdev_name(const struct net_device *dev)
2474 if (dev->reg_state != NETREG_REGISTERED)
2475 return "(unregistered net_device)";
2479 extern int netdev_printk(const char *level, const struct net_device *dev,
2480 const char *format, ...)
2481 __attribute__ ((format (printf, 3, 4)));
2482 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2483 __attribute__ ((format (printf, 2, 3)));
2484 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2485 __attribute__ ((format (printf, 2, 3)));
2486 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2487 __attribute__ ((format (printf, 2, 3)));
2488 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2489 __attribute__ ((format (printf, 2, 3)));
2490 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2491 __attribute__ ((format (printf, 2, 3)));
2492 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2493 __attribute__ ((format (printf, 2, 3)));
2494 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2495 __attribute__ ((format (printf, 2, 3)));
2498 #define netdev_dbg(__dev, format, args...) \
2499 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2500 #elif defined(CONFIG_DYNAMIC_DEBUG)
2501 #define netdev_dbg(__dev, format, args...) \
2503 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2504 netdev_name(__dev), ##args); \
2507 #define netdev_dbg(__dev, format, args...) \
2510 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2515 #if defined(VERBOSE_DEBUG)
2516 #define netdev_vdbg netdev_dbg
2519 #define netdev_vdbg(dev, format, args...) \
2522 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2528 * netdev_WARN() acts like dev_printk(), but with the key difference
2529 * of using a WARN/WARN_ON to get the message out, including the
2530 * file/line information and a backtrace.
2532 #define netdev_WARN(dev, format, args...) \
2533 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2535 /* netif printk helpers, similar to netdev_printk */
2537 #define netif_printk(priv, type, level, dev, fmt, args...) \
2539 if (netif_msg_##type(priv)) \
2540 netdev_printk(level, (dev), fmt, ##args); \
2543 #define netif_level(level, priv, type, dev, fmt, args...) \
2545 if (netif_msg_##type(priv)) \
2546 netdev_##level(dev, fmt, ##args); \
2549 #define netif_emerg(priv, type, dev, fmt, args...) \
2550 netif_level(emerg, priv, type, dev, fmt, ##args)
2551 #define netif_alert(priv, type, dev, fmt, args...) \
2552 netif_level(alert, priv, type, dev, fmt, ##args)
2553 #define netif_crit(priv, type, dev, fmt, args...) \
2554 netif_level(crit, priv, type, dev, fmt, ##args)
2555 #define netif_err(priv, type, dev, fmt, args...) \
2556 netif_level(err, priv, type, dev, fmt, ##args)
2557 #define netif_warn(priv, type, dev, fmt, args...) \
2558 netif_level(warn, priv, type, dev, fmt, ##args)
2559 #define netif_notice(priv, type, dev, fmt, args...) \
2560 netif_level(notice, priv, type, dev, fmt, ##args)
2561 #define netif_info(priv, type, dev, fmt, args...) \
2562 netif_level(info, priv, type, dev, fmt, ##args)
2565 #define netif_dbg(priv, type, dev, format, args...) \
2566 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2567 #elif defined(CONFIG_DYNAMIC_DEBUG)
2568 #define netif_dbg(priv, type, netdev, format, args...) \
2570 if (netif_msg_##type(priv)) \
2571 dynamic_dev_dbg((netdev)->dev.parent, \
2573 netdev_name(netdev), ##args); \
2576 #define netif_dbg(priv, type, dev, format, args...) \
2579 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2584 #if defined(VERBOSE_DEBUG)
2585 #define netif_vdbg netif_dbg
2587 #define netif_vdbg(priv, type, dev, format, args...) \
2590 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2595 #endif /* __KERNEL__ */
2597 #endif /* _LINUX_NETDEVICE_H */