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 */
141 /* Initial net device group. All devices belong to group 0 by default. */
142 #define INIT_NETDEV_GROUP 0
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
780 * Fiber Channel over Ethernet (FCoE) offload functions.
781 * int (*ndo_fcoe_enable)(struct net_device *dev);
782 * Called when the FCoE protocol stack wants to start using LLD for FCoE
783 * so the underlying device can perform whatever needed configuration or
784 * initialization to support acceleration of FCoE traffic.
786 * int (*ndo_fcoe_disable)(struct net_device *dev);
787 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
788 * so the underlying device can perform whatever needed clean-ups to
789 * stop supporting acceleration of FCoE traffic.
791 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
792 * struct scatterlist *sgl, unsigned int sgc);
793 * Called when the FCoE Initiator wants to initialize an I/O that
794 * is a possible candidate for Direct Data Placement (DDP). The LLD can
795 * perform necessary setup and returns 1 to indicate the device is set up
796 * successfully to perform DDP on this I/O, otherwise this returns 0.
798 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
799 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
800 * indicated by the FC exchange id 'xid', so the underlying device can
801 * clean up and reuse resources for later DDP requests.
803 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
804 * struct scatterlist *sgl, unsigned int sgc);
805 * Called when the FCoE Target wants to initialize an I/O that
806 * is a possible candidate for Direct Data Placement (DDP). The LLD can
807 * perform necessary setup and returns 1 to indicate the device is set up
808 * successfully to perform DDP on this I/O, otherwise this returns 0.
810 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
811 * Called when the underlying device wants to override default World Wide
812 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
813 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
814 * protocol stack to use.
817 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
818 * u16 rxq_index, u32 flow_id);
819 * Set hardware filter for RFS. rxq_index is the target queue index;
820 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
821 * Return the filter ID on success, or a negative error code.
823 * Slave management functions (for bridge, bonding, etc). User should
824 * call netdev_set_master() to set dev->master properly.
825 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
826 * Called to make another netdev an underling.
828 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
829 * Called to release previously enslaved netdev.
831 * Feature/offload setting functions.
832 * u32 (*ndo_fix_features)(struct net_device *dev, u32 features);
833 * Adjusts the requested feature flags according to device-specific
834 * constraints, and returns the resulting flags. Must not modify
837 * int (*ndo_set_features)(struct net_device *dev, u32 features);
838 * Called to update device configuration to new features. Passed
839 * feature set might be less than what was returned by ndo_fix_features()).
840 * Must return >0 or -errno if it changed dev->features itself.
843 #define HAVE_NET_DEVICE_OPS
844 struct net_device_ops {
845 int (*ndo_init)(struct net_device *dev);
846 void (*ndo_uninit)(struct net_device *dev);
847 int (*ndo_open)(struct net_device *dev);
848 int (*ndo_stop)(struct net_device *dev);
849 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
850 struct net_device *dev);
851 u16 (*ndo_select_queue)(struct net_device *dev,
852 struct sk_buff *skb);
853 void (*ndo_change_rx_flags)(struct net_device *dev,
855 void (*ndo_set_rx_mode)(struct net_device *dev);
856 void (*ndo_set_multicast_list)(struct net_device *dev);
857 int (*ndo_set_mac_address)(struct net_device *dev,
859 int (*ndo_validate_addr)(struct net_device *dev);
860 int (*ndo_do_ioctl)(struct net_device *dev,
861 struct ifreq *ifr, int cmd);
862 int (*ndo_set_config)(struct net_device *dev,
864 int (*ndo_change_mtu)(struct net_device *dev,
866 int (*ndo_neigh_setup)(struct net_device *dev,
867 struct neigh_parms *);
868 void (*ndo_tx_timeout) (struct net_device *dev);
870 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
871 struct rtnl_link_stats64 *storage);
872 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
874 void (*ndo_vlan_rx_register)(struct net_device *dev,
875 struct vlan_group *grp);
876 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
878 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
880 #ifdef CONFIG_NET_POLL_CONTROLLER
881 void (*ndo_poll_controller)(struct net_device *dev);
882 int (*ndo_netpoll_setup)(struct net_device *dev,
883 struct netpoll_info *info);
884 void (*ndo_netpoll_cleanup)(struct net_device *dev);
886 int (*ndo_set_vf_mac)(struct net_device *dev,
888 int (*ndo_set_vf_vlan)(struct net_device *dev,
889 int queue, u16 vlan, u8 qos);
890 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
892 int (*ndo_get_vf_config)(struct net_device *dev,
894 struct ifla_vf_info *ivf);
895 int (*ndo_set_vf_port)(struct net_device *dev,
897 struct nlattr *port[]);
898 int (*ndo_get_vf_port)(struct net_device *dev,
899 int vf, struct sk_buff *skb);
900 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
901 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
902 int (*ndo_fcoe_enable)(struct net_device *dev);
903 int (*ndo_fcoe_disable)(struct net_device *dev);
904 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
906 struct scatterlist *sgl,
908 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
910 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
912 struct scatterlist *sgl,
914 #define NETDEV_FCOE_WWNN 0
915 #define NETDEV_FCOE_WWPN 1
916 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
919 #ifdef CONFIG_RFS_ACCEL
920 int (*ndo_rx_flow_steer)(struct net_device *dev,
921 const struct sk_buff *skb,
925 int (*ndo_add_slave)(struct net_device *dev,
926 struct net_device *slave_dev);
927 int (*ndo_del_slave)(struct net_device *dev,
928 struct net_device *slave_dev);
929 u32 (*ndo_fix_features)(struct net_device *dev,
931 int (*ndo_set_features)(struct net_device *dev,
936 * The DEVICE structure.
937 * Actually, this whole structure is a big mistake. It mixes I/O
938 * data with strictly "high-level" data, and it has to know about
939 * almost every data structure used in the INET module.
941 * FIXME: cleanup struct net_device such that network protocol info
948 * This is the first field of the "visible" part of this structure
949 * (i.e. as seen by users in the "Space.c" file). It is the name
954 struct pm_qos_request_list pm_qos_req;
956 /* device name hash chain */
957 struct hlist_node name_hlist;
962 * I/O specific fields
963 * FIXME: Merge these and struct ifmap into one
965 unsigned long mem_end; /* shared mem end */
966 unsigned long mem_start; /* shared mem start */
967 unsigned long base_addr; /* device I/O address */
968 unsigned int irq; /* device IRQ number */
971 * Some hardware also needs these fields, but they are not
972 * part of the usual set specified in Space.c.
975 unsigned char if_port; /* Selectable AUI, TP,..*/
976 unsigned char dma; /* DMA channel */
980 struct list_head dev_list;
981 struct list_head napi_list;
982 struct list_head unreg_list;
984 /* currently active device features */
986 /* user-changeable features */
988 /* user-requested features */
990 /* VLAN feature mask */
993 /* Net device feature bits; if you change something,
994 * also update netdev_features_strings[] in ethtool.c */
996 #define NETIF_F_SG 1 /* Scatter/gather IO. */
997 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
998 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
999 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
1000 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
1001 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
1002 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
1003 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
1004 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
1005 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
1006 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
1007 #define NETIF_F_GSO 2048 /* Enable software GSO. */
1008 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
1009 /* do not use LLTX in new drivers */
1010 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
1011 #define NETIF_F_GRO 16384 /* Generic receive offload */
1012 #define NETIF_F_LRO 32768 /* large receive offload */
1014 /* the GSO_MASK reserves bits 16 through 23 */
1015 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
1016 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
1017 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
1018 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
1019 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
1020 #define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
1022 /* Segmentation offload features */
1023 #define NETIF_F_GSO_SHIFT 16
1024 #define NETIF_F_GSO_MASK 0x00ff0000
1025 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
1026 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
1027 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
1028 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
1029 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
1030 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
1032 /* Features valid for ethtool to change */
1033 /* = all defined minus driver/device-class-related */
1034 #define NETIF_F_NEVER_CHANGE (NETIF_F_HIGHDMA | NETIF_F_VLAN_CHALLENGED | \
1035 NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
1036 #define NETIF_F_ETHTOOL_BITS (0x3f3fffff & ~NETIF_F_NEVER_CHANGE)
1038 /* List of features with software fallbacks. */
1039 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
1040 NETIF_F_TSO6 | NETIF_F_UFO)
1043 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
1044 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
1045 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
1046 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
1048 #define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
1050 #define NETIF_F_ALL_TX_OFFLOADS (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1051 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1052 NETIF_F_SCTP_CSUM | NETIF_F_FCOE_CRC)
1055 * If one device supports one of these features, then enable them
1056 * for all in netdev_increment_features.
1058 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
1059 NETIF_F_SG | NETIF_F_HIGHDMA | \
1062 /* changeable features with no special hardware requirements */
1063 #define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO)
1065 /* Interface index. Unique device identifier */
1069 struct net_device_stats stats;
1070 atomic_long_t rx_dropped; /* dropped packets by core network
1071 * Do not use this in drivers.
1074 #ifdef CONFIG_WIRELESS_EXT
1075 /* List of functions to handle Wireless Extensions (instead of ioctl).
1076 * See <net/iw_handler.h> for details. Jean II */
1077 const struct iw_handler_def * wireless_handlers;
1078 /* Instance data managed by the core of Wireless Extensions. */
1079 struct iw_public_data * wireless_data;
1081 /* Management operations */
1082 const struct net_device_ops *netdev_ops;
1083 const struct ethtool_ops *ethtool_ops;
1085 /* Hardware header description */
1086 const struct header_ops *header_ops;
1088 unsigned int flags; /* interface flags (a la BSD) */
1089 unsigned short gflags;
1090 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
1091 unsigned short padded; /* How much padding added by alloc_netdev() */
1093 unsigned char operstate; /* RFC2863 operstate */
1094 unsigned char link_mode; /* mapping policy to operstate */
1096 unsigned int mtu; /* interface MTU value */
1097 unsigned short type; /* interface hardware type */
1098 unsigned short hard_header_len; /* hardware hdr length */
1100 /* extra head- and tailroom the hardware may need, but not in all cases
1101 * can this be guaranteed, especially tailroom. Some cases also use
1102 * LL_MAX_HEADER instead to allocate the skb.
1104 unsigned short needed_headroom;
1105 unsigned short needed_tailroom;
1107 /* Interface address info. */
1108 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1109 unsigned char addr_assign_type; /* hw address assignment type */
1110 unsigned char addr_len; /* hardware address length */
1111 unsigned short dev_id; /* for shared network cards */
1113 spinlock_t addr_list_lock;
1114 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1115 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
1117 unsigned int promiscuity;
1118 unsigned int allmulti;
1121 /* Protocol specific pointers */
1123 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
1124 struct vlan_group __rcu *vlgrp; /* VLAN group */
1126 #ifdef CONFIG_NET_DSA
1127 void *dsa_ptr; /* dsa specific data */
1129 void *atalk_ptr; /* AppleTalk link */
1130 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1131 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1132 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1133 void *ec_ptr; /* Econet specific data */
1134 void *ax25_ptr; /* AX.25 specific data */
1135 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1136 assign before registering */
1139 * Cache lines mostly used on receive path (including eth_type_trans())
1141 unsigned long last_rx; /* Time of last Rx
1142 * This should not be set in
1143 * drivers, unless really needed,
1144 * because network stack (bonding)
1145 * use it if/when necessary, to
1146 * avoid dirtying this cache line.
1149 struct net_device *master; /* Pointer to master device of a group,
1150 * which this device is member of.
1153 /* Interface address info used in eth_type_trans() */
1154 unsigned char *dev_addr; /* hw address, (before bcast
1155 because most packets are
1158 struct netdev_hw_addr_list dev_addrs; /* list of device
1161 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1164 struct kset *queues_kset;
1166 struct netdev_rx_queue *_rx;
1168 /* Number of RX queues allocated at register_netdev() time */
1169 unsigned int num_rx_queues;
1171 /* Number of RX queues currently active in device */
1172 unsigned int real_num_rx_queues;
1174 #ifdef CONFIG_RFS_ACCEL
1175 /* CPU reverse-mapping for RX completion interrupts, indexed
1176 * by RX queue number. Assigned by driver. This must only be
1177 * set if the ndo_rx_flow_steer operation is defined. */
1178 struct cpu_rmap *rx_cpu_rmap;
1182 rx_handler_func_t __rcu *rx_handler;
1183 void __rcu *rx_handler_data;
1185 struct netdev_queue __rcu *ingress_queue;
1188 * Cache lines mostly used on transmit path
1190 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1192 /* Number of TX queues allocated at alloc_netdev_mq() time */
1193 unsigned int num_tx_queues;
1195 /* Number of TX queues currently active in device */
1196 unsigned int real_num_tx_queues;
1198 /* root qdisc from userspace point of view */
1199 struct Qdisc *qdisc;
1201 unsigned long tx_queue_len; /* Max frames per queue allowed */
1202 spinlock_t tx_global_lock;
1205 struct xps_dev_maps __rcu *xps_maps;
1208 /* These may be needed for future network-power-down code. */
1211 * trans_start here is expensive for high speed devices on SMP,
1212 * please use netdev_queue->trans_start instead.
1214 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1216 int watchdog_timeo; /* used by dev_watchdog() */
1217 struct timer_list watchdog_timer;
1219 /* Number of references to this device */
1220 int __percpu *pcpu_refcnt;
1222 /* delayed register/unregister */
1223 struct list_head todo_list;
1224 /* device index hash chain */
1225 struct hlist_node index_hlist;
1227 struct list_head link_watch_list;
1229 /* register/unregister state machine */
1230 enum { NETREG_UNINITIALIZED=0,
1231 NETREG_REGISTERED, /* completed register_netdevice */
1232 NETREG_UNREGISTERING, /* called unregister_netdevice */
1233 NETREG_UNREGISTERED, /* completed unregister todo */
1234 NETREG_RELEASED, /* called free_netdev */
1235 NETREG_DUMMY, /* dummy device for NAPI poll */
1239 RTNL_LINK_INITIALIZED,
1240 RTNL_LINK_INITIALIZING,
1241 } rtnl_link_state:16;
1243 /* Called from unregister, can be used to call free_netdev */
1244 void (*destructor)(struct net_device *dev);
1246 #ifdef CONFIG_NETPOLL
1247 struct netpoll_info *npinfo;
1250 #ifdef CONFIG_NET_NS
1251 /* Network namespace this network device is inside */
1255 /* mid-layer private */
1258 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1259 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1260 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1263 struct garp_port __rcu *garp_port;
1265 /* class/net/name entry */
1267 /* space for optional device, statistics, and wireless sysfs groups */
1268 const struct attribute_group *sysfs_groups[4];
1270 /* rtnetlink link ops */
1271 const struct rtnl_link_ops *rtnl_link_ops;
1273 /* for setting kernel sock attribute on TCP connection setup */
1274 #define GSO_MAX_SIZE 65536
1275 unsigned int gso_max_size;
1278 /* Data Center Bridging netlink ops */
1279 const struct dcbnl_rtnl_ops *dcbnl_ops;
1282 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1283 u8 prio_tc_map[TC_BITMASK + 1];
1285 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1286 /* max exchange id for FCoE LRO by ddp */
1287 unsigned int fcoe_ddp_xid;
1289 /* n-tuple filter list attached to this device */
1290 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1292 /* phy device may attach itself for hardware timestamping */
1293 struct phy_device *phydev;
1295 /* group the device belongs to */
1298 #define to_net_dev(d) container_of(d, struct net_device, dev)
1300 #define NETDEV_ALIGN 32
1303 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1305 return dev->prio_tc_map[prio & TC_BITMASK];
1309 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1311 if (tc >= dev->num_tc)
1314 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1319 void netdev_reset_tc(struct net_device *dev)
1322 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1323 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1327 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1329 if (tc >= dev->num_tc)
1332 dev->tc_to_txq[tc].count = count;
1333 dev->tc_to_txq[tc].offset = offset;
1338 int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1340 if (num_tc > TC_MAX_QUEUE)
1343 dev->num_tc = num_tc;
1348 int netdev_get_num_tc(struct net_device *dev)
1354 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1357 return &dev->_tx[index];
1360 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1361 void (*f)(struct net_device *,
1362 struct netdev_queue *,
1368 for (i = 0; i < dev->num_tx_queues; i++)
1369 f(dev, &dev->_tx[i], arg);
1373 * Net namespace inlines
1376 struct net *dev_net(const struct net_device *dev)
1378 return read_pnet(&dev->nd_net);
1382 void dev_net_set(struct net_device *dev, struct net *net)
1384 #ifdef CONFIG_NET_NS
1385 release_net(dev->nd_net);
1386 dev->nd_net = hold_net(net);
1390 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1392 #ifdef CONFIG_NET_DSA_TAG_DSA
1393 if (dev->dsa_ptr != NULL)
1394 return dsa_uses_dsa_tags(dev->dsa_ptr);
1400 #ifndef CONFIG_NET_NS
1401 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1405 #else /* CONFIG_NET_NS */
1406 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1409 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1411 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1412 if (dev->dsa_ptr != NULL)
1413 return dsa_uses_trailer_tags(dev->dsa_ptr);
1420 * netdev_priv - access network device private data
1421 * @dev: network device
1423 * Get network device private data
1425 static inline void *netdev_priv(const struct net_device *dev)
1427 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1430 /* Set the sysfs physical device reference for the network logical device
1431 * if set prior to registration will cause a symlink during initialization.
1433 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1435 /* Set the sysfs device type for the network logical device to allow
1436 * fin grained indentification of different network device types. For
1437 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1439 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1442 * netif_napi_add - initialize a napi context
1443 * @dev: network device
1444 * @napi: napi context
1445 * @poll: polling function
1446 * @weight: default weight
1448 * netif_napi_add() must be used to initialize a napi context prior to calling
1449 * *any* of the other napi related functions.
1451 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1452 int (*poll)(struct napi_struct *, int), int weight);
1455 * netif_napi_del - remove a napi context
1456 * @napi: napi context
1458 * netif_napi_del() removes a napi context from the network device napi list
1460 void netif_napi_del(struct napi_struct *napi);
1462 struct napi_gro_cb {
1463 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1466 /* Length of frag0. */
1467 unsigned int frag0_len;
1469 /* This indicates where we are processing relative to skb->data. */
1472 /* This is non-zero if the packet may be of the same flow. */
1475 /* This is non-zero if the packet cannot be merged with the new skb. */
1478 /* Number of segments aggregated. */
1485 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1487 struct packet_type {
1488 __be16 type; /* This is really htons(ether_type). */
1489 struct net_device *dev; /* NULL is wildcarded here */
1490 int (*func) (struct sk_buff *,
1491 struct net_device *,
1492 struct packet_type *,
1493 struct net_device *);
1494 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1496 int (*gso_send_check)(struct sk_buff *skb);
1497 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1498 struct sk_buff *skb);
1499 int (*gro_complete)(struct sk_buff *skb);
1500 void *af_packet_priv;
1501 struct list_head list;
1504 #include <linux/interrupt.h>
1505 #include <linux/notifier.h>
1507 extern rwlock_t dev_base_lock; /* Device list lock */
1510 #define for_each_netdev(net, d) \
1511 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1512 #define for_each_netdev_reverse(net, d) \
1513 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1514 #define for_each_netdev_rcu(net, d) \
1515 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1516 #define for_each_netdev_safe(net, d, n) \
1517 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1518 #define for_each_netdev_continue(net, d) \
1519 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1520 #define for_each_netdev_continue_rcu(net, d) \
1521 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1522 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1524 static inline struct net_device *next_net_device(struct net_device *dev)
1526 struct list_head *lh;
1530 lh = dev->dev_list.next;
1531 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1534 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1536 struct list_head *lh;
1540 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1541 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1544 static inline struct net_device *first_net_device(struct net *net)
1546 return list_empty(&net->dev_base_head) ? NULL :
1547 net_device_entry(net->dev_base_head.next);
1550 static inline struct net_device *first_net_device_rcu(struct net *net)
1552 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1554 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1557 extern int netdev_boot_setup_check(struct net_device *dev);
1558 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1559 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1560 const char *hwaddr);
1561 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1562 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1563 extern void dev_add_pack(struct packet_type *pt);
1564 extern void dev_remove_pack(struct packet_type *pt);
1565 extern void __dev_remove_pack(struct packet_type *pt);
1567 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1568 unsigned short mask);
1569 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1570 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1571 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1572 extern int dev_alloc_name(struct net_device *dev, const char *name);
1573 extern int dev_open(struct net_device *dev);
1574 extern int dev_close(struct net_device *dev);
1575 extern void dev_disable_lro(struct net_device *dev);
1576 extern int dev_queue_xmit(struct sk_buff *skb);
1577 extern int register_netdevice(struct net_device *dev);
1578 extern void unregister_netdevice_queue(struct net_device *dev,
1579 struct list_head *head);
1580 extern void unregister_netdevice_many(struct list_head *head);
1581 static inline void unregister_netdevice(struct net_device *dev)
1583 unregister_netdevice_queue(dev, NULL);
1586 extern int netdev_refcnt_read(const struct net_device *dev);
1587 extern void free_netdev(struct net_device *dev);
1588 extern void synchronize_net(void);
1589 extern int register_netdevice_notifier(struct notifier_block *nb);
1590 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1591 extern int init_dummy_netdev(struct net_device *dev);
1592 extern void netdev_resync_ops(struct net_device *dev);
1594 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1595 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1596 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1597 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1598 extern int dev_restart(struct net_device *dev);
1599 #ifdef CONFIG_NETPOLL_TRAP
1600 extern int netpoll_trap(void);
1602 extern int skb_gro_receive(struct sk_buff **head,
1603 struct sk_buff *skb);
1604 extern void skb_gro_reset_offset(struct sk_buff *skb);
1606 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1608 return NAPI_GRO_CB(skb)->data_offset;
1611 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1613 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1616 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1618 NAPI_GRO_CB(skb)->data_offset += len;
1621 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1622 unsigned int offset)
1624 return NAPI_GRO_CB(skb)->frag0 + offset;
1627 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1629 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1632 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1633 unsigned int offset)
1635 NAPI_GRO_CB(skb)->frag0 = NULL;
1636 NAPI_GRO_CB(skb)->frag0_len = 0;
1637 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1640 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1642 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1645 static inline void *skb_gro_network_header(struct sk_buff *skb)
1647 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1648 skb_network_offset(skb);
1651 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1652 unsigned short type,
1653 const void *daddr, const void *saddr,
1656 if (!dev->header_ops || !dev->header_ops->create)
1659 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1662 static inline int dev_parse_header(const struct sk_buff *skb,
1663 unsigned char *haddr)
1665 const struct net_device *dev = skb->dev;
1667 if (!dev->header_ops || !dev->header_ops->parse)
1669 return dev->header_ops->parse(skb, haddr);
1672 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1673 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1674 static inline int unregister_gifconf(unsigned int family)
1676 return register_gifconf(family, NULL);
1680 * Incoming packets are placed on per-cpu queues
1682 struct softnet_data {
1683 struct Qdisc *output_queue;
1684 struct Qdisc **output_queue_tailp;
1685 struct list_head poll_list;
1686 struct sk_buff *completion_queue;
1687 struct sk_buff_head process_queue;
1690 unsigned int processed;
1691 unsigned int time_squeeze;
1692 unsigned int cpu_collision;
1693 unsigned int received_rps;
1696 struct softnet_data *rps_ipi_list;
1698 /* Elements below can be accessed between CPUs for RPS */
1699 struct call_single_data csd ____cacheline_aligned_in_smp;
1700 struct softnet_data *rps_ipi_next;
1702 unsigned int input_queue_head;
1703 unsigned int input_queue_tail;
1706 struct sk_buff_head input_pkt_queue;
1707 struct napi_struct backlog;
1710 static inline void input_queue_head_incr(struct softnet_data *sd)
1713 sd->input_queue_head++;
1717 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1718 unsigned int *qtail)
1721 *qtail = ++sd->input_queue_tail;
1725 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1727 #define HAVE_NETIF_QUEUE
1729 extern void __netif_schedule(struct Qdisc *q);
1731 static inline void netif_schedule_queue(struct netdev_queue *txq)
1733 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1734 __netif_schedule(txq->qdisc);
1737 static inline void netif_tx_schedule_all(struct net_device *dev)
1741 for (i = 0; i < dev->num_tx_queues; i++)
1742 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1745 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1747 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1751 * netif_start_queue - allow transmit
1752 * @dev: network device
1754 * Allow upper layers to call the device hard_start_xmit routine.
1756 static inline void netif_start_queue(struct net_device *dev)
1758 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1761 static inline void netif_tx_start_all_queues(struct net_device *dev)
1765 for (i = 0; i < dev->num_tx_queues; i++) {
1766 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1767 netif_tx_start_queue(txq);
1771 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1773 #ifdef CONFIG_NETPOLL_TRAP
1774 if (netpoll_trap()) {
1775 netif_tx_start_queue(dev_queue);
1779 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1780 __netif_schedule(dev_queue->qdisc);
1784 * netif_wake_queue - restart transmit
1785 * @dev: network device
1787 * Allow upper layers to call the device hard_start_xmit routine.
1788 * Used for flow control when transmit resources are available.
1790 static inline void netif_wake_queue(struct net_device *dev)
1792 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1795 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1799 for (i = 0; i < dev->num_tx_queues; i++) {
1800 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1801 netif_tx_wake_queue(txq);
1805 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1807 if (WARN_ON(!dev_queue)) {
1808 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1811 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1815 * netif_stop_queue - stop transmitted packets
1816 * @dev: network device
1818 * Stop upper layers calling the device hard_start_xmit routine.
1819 * Used for flow control when transmit resources are unavailable.
1821 static inline void netif_stop_queue(struct net_device *dev)
1823 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1826 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1830 for (i = 0; i < dev->num_tx_queues; i++) {
1831 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1832 netif_tx_stop_queue(txq);
1836 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1838 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1842 * netif_queue_stopped - test if transmit queue is flowblocked
1843 * @dev: network device
1845 * Test if transmit queue on device is currently unable to send.
1847 static inline int netif_queue_stopped(const struct net_device *dev)
1849 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1852 static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
1854 return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
1858 * netif_running - test if up
1859 * @dev: network device
1861 * Test if the device has been brought up.
1863 static inline int netif_running(const struct net_device *dev)
1865 return test_bit(__LINK_STATE_START, &dev->state);
1869 * Routines to manage the subqueues on a device. We only need start
1870 * stop, and a check if it's stopped. All other device management is
1871 * done at the overall netdevice level.
1872 * Also test the device if we're multiqueue.
1876 * netif_start_subqueue - allow sending packets on subqueue
1877 * @dev: network device
1878 * @queue_index: sub queue index
1880 * Start individual transmit queue of a device with multiple transmit queues.
1882 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1884 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1886 netif_tx_start_queue(txq);
1890 * netif_stop_subqueue - stop sending packets on subqueue
1891 * @dev: network device
1892 * @queue_index: sub queue index
1894 * Stop individual transmit queue of a device with multiple transmit queues.
1896 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1898 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1899 #ifdef CONFIG_NETPOLL_TRAP
1903 netif_tx_stop_queue(txq);
1907 * netif_subqueue_stopped - test status of subqueue
1908 * @dev: network device
1909 * @queue_index: sub queue index
1911 * Check individual transmit queue of a device with multiple transmit queues.
1913 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1916 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1918 return netif_tx_queue_stopped(txq);
1921 static inline int netif_subqueue_stopped(const struct net_device *dev,
1922 struct sk_buff *skb)
1924 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1928 * netif_wake_subqueue - allow sending packets on subqueue
1929 * @dev: network device
1930 * @queue_index: sub queue index
1932 * Resume individual transmit queue of a device with multiple transmit queues.
1934 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1936 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1937 #ifdef CONFIG_NETPOLL_TRAP
1941 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1942 __netif_schedule(txq->qdisc);
1946 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
1947 * as a distribution range limit for the returned value.
1949 static inline u16 skb_tx_hash(const struct net_device *dev,
1950 const struct sk_buff *skb)
1952 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
1956 * netif_is_multiqueue - test if device has multiple transmit queues
1957 * @dev: network device
1959 * Check if device has multiple transmit queues
1961 static inline int netif_is_multiqueue(const struct net_device *dev)
1963 return dev->num_tx_queues > 1;
1966 extern int netif_set_real_num_tx_queues(struct net_device *dev,
1970 extern int netif_set_real_num_rx_queues(struct net_device *dev,
1973 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
1980 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
1981 const struct net_device *from_dev)
1983 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
1985 return netif_set_real_num_rx_queues(to_dev,
1986 from_dev->real_num_rx_queues);
1992 /* Use this variant when it is known for sure that it
1993 * is executing from hardware interrupt context or with hardware interrupts
1996 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1998 /* Use this variant in places where it could be invoked
1999 * from either hardware interrupt or other context, with hardware interrupts
2000 * either disabled or enabled.
2002 extern void dev_kfree_skb_any(struct sk_buff *skb);
2004 #define HAVE_NETIF_RX 1
2005 extern int netif_rx(struct sk_buff *skb);
2006 extern int netif_rx_ni(struct sk_buff *skb);
2007 #define HAVE_NETIF_RECEIVE_SKB 1
2008 extern int netif_receive_skb(struct sk_buff *skb);
2009 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
2010 struct sk_buff *skb);
2011 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
2012 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
2013 struct sk_buff *skb);
2014 extern void napi_gro_flush(struct napi_struct *napi);
2015 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
2016 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
2017 struct sk_buff *skb,
2019 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
2020 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
2022 static inline void napi_free_frags(struct napi_struct *napi)
2024 kfree_skb(napi->skb);
2028 extern int netdev_rx_handler_register(struct net_device *dev,
2029 rx_handler_func_t *rx_handler,
2030 void *rx_handler_data);
2031 extern void netdev_rx_handler_unregister(struct net_device *dev);
2033 extern int dev_valid_name(const char *name);
2034 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2035 extern int dev_ethtool(struct net *net, struct ifreq *);
2036 extern unsigned dev_get_flags(const struct net_device *);
2037 extern int __dev_change_flags(struct net_device *, unsigned int flags);
2038 extern int dev_change_flags(struct net_device *, unsigned);
2039 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
2040 extern int dev_change_name(struct net_device *, const char *);
2041 extern int dev_set_alias(struct net_device *, const char *, size_t);
2042 extern int dev_change_net_namespace(struct net_device *,
2043 struct net *, const char *);
2044 extern int dev_set_mtu(struct net_device *, int);
2045 extern void dev_set_group(struct net_device *, int);
2046 extern int dev_set_mac_address(struct net_device *,
2048 extern int dev_hard_start_xmit(struct sk_buff *skb,
2049 struct net_device *dev,
2050 struct netdev_queue *txq);
2051 extern int dev_forward_skb(struct net_device *dev,
2052 struct sk_buff *skb);
2054 extern int netdev_budget;
2056 /* Called by rtnetlink.c:rtnl_unlock() */
2057 extern void netdev_run_todo(void);
2060 * dev_put - release reference to device
2061 * @dev: network device
2063 * Release reference to device to allow it to be freed.
2065 static inline void dev_put(struct net_device *dev)
2067 irqsafe_cpu_dec(*dev->pcpu_refcnt);
2071 * dev_hold - get reference to device
2072 * @dev: network device
2074 * Hold reference to device to keep it from being freed.
2076 static inline void dev_hold(struct net_device *dev)
2078 irqsafe_cpu_inc(*dev->pcpu_refcnt);
2081 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2082 * and _off may be called from IRQ context, but it is caller
2083 * who is responsible for serialization of these calls.
2085 * The name carrier is inappropriate, these functions should really be
2086 * called netif_lowerlayer_*() because they represent the state of any
2087 * kind of lower layer not just hardware media.
2090 extern void linkwatch_fire_event(struct net_device *dev);
2091 extern void linkwatch_forget_dev(struct net_device *dev);
2094 * netif_carrier_ok - test if carrier present
2095 * @dev: network device
2097 * Check if carrier is present on device
2099 static inline int netif_carrier_ok(const struct net_device *dev)
2101 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2104 extern unsigned long dev_trans_start(struct net_device *dev);
2106 extern void __netdev_watchdog_up(struct net_device *dev);
2108 extern void netif_carrier_on(struct net_device *dev);
2110 extern void netif_carrier_off(struct net_device *dev);
2112 extern void netif_notify_peers(struct net_device *dev);
2115 * netif_dormant_on - mark device as dormant.
2116 * @dev: network device
2118 * Mark device as dormant (as per RFC2863).
2120 * The dormant state indicates that the relevant interface is not
2121 * actually in a condition to pass packets (i.e., it is not 'up') but is
2122 * in a "pending" state, waiting for some external event. For "on-
2123 * demand" interfaces, this new state identifies the situation where the
2124 * interface is waiting for events to place it in the up state.
2127 static inline void netif_dormant_on(struct net_device *dev)
2129 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2130 linkwatch_fire_event(dev);
2134 * netif_dormant_off - set device as not dormant.
2135 * @dev: network device
2137 * Device is not in dormant state.
2139 static inline void netif_dormant_off(struct net_device *dev)
2141 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2142 linkwatch_fire_event(dev);
2146 * netif_dormant - test if carrier present
2147 * @dev: network device
2149 * Check if carrier is present on device
2151 static inline int netif_dormant(const struct net_device *dev)
2153 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2158 * netif_oper_up - test if device is operational
2159 * @dev: network device
2161 * Check if carrier is operational
2163 static inline int netif_oper_up(const struct net_device *dev)
2165 return (dev->operstate == IF_OPER_UP ||
2166 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2170 * netif_device_present - is device available or removed
2171 * @dev: network device
2173 * Check if device has not been removed from system.
2175 static inline int netif_device_present(struct net_device *dev)
2177 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2180 extern void netif_device_detach(struct net_device *dev);
2182 extern void netif_device_attach(struct net_device *dev);
2185 * Network interface message level settings
2187 #define HAVE_NETIF_MSG 1
2190 NETIF_MSG_DRV = 0x0001,
2191 NETIF_MSG_PROBE = 0x0002,
2192 NETIF_MSG_LINK = 0x0004,
2193 NETIF_MSG_TIMER = 0x0008,
2194 NETIF_MSG_IFDOWN = 0x0010,
2195 NETIF_MSG_IFUP = 0x0020,
2196 NETIF_MSG_RX_ERR = 0x0040,
2197 NETIF_MSG_TX_ERR = 0x0080,
2198 NETIF_MSG_TX_QUEUED = 0x0100,
2199 NETIF_MSG_INTR = 0x0200,
2200 NETIF_MSG_TX_DONE = 0x0400,
2201 NETIF_MSG_RX_STATUS = 0x0800,
2202 NETIF_MSG_PKTDATA = 0x1000,
2203 NETIF_MSG_HW = 0x2000,
2204 NETIF_MSG_WOL = 0x4000,
2207 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2208 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2209 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2210 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2211 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2212 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2213 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2214 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2215 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2216 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2217 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2218 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2219 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2220 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2221 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2223 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2226 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2227 return default_msg_enable_bits;
2228 if (debug_value == 0) /* no output */
2230 /* set low N bits */
2231 return (1 << debug_value) - 1;
2234 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2236 spin_lock(&txq->_xmit_lock);
2237 txq->xmit_lock_owner = cpu;
2240 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2242 spin_lock_bh(&txq->_xmit_lock);
2243 txq->xmit_lock_owner = smp_processor_id();
2246 static inline int __netif_tx_trylock(struct netdev_queue *txq)
2248 int ok = spin_trylock(&txq->_xmit_lock);
2250 txq->xmit_lock_owner = smp_processor_id();
2254 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2256 txq->xmit_lock_owner = -1;
2257 spin_unlock(&txq->_xmit_lock);
2260 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2262 txq->xmit_lock_owner = -1;
2263 spin_unlock_bh(&txq->_xmit_lock);
2266 static inline void txq_trans_update(struct netdev_queue *txq)
2268 if (txq->xmit_lock_owner != -1)
2269 txq->trans_start = jiffies;
2273 * netif_tx_lock - grab network device transmit lock
2274 * @dev: network device
2276 * Get network device transmit lock
2278 static inline void netif_tx_lock(struct net_device *dev)
2283 spin_lock(&dev->tx_global_lock);
2284 cpu = smp_processor_id();
2285 for (i = 0; i < dev->num_tx_queues; i++) {
2286 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2288 /* We are the only thread of execution doing a
2289 * freeze, but we have to grab the _xmit_lock in
2290 * order to synchronize with threads which are in
2291 * the ->hard_start_xmit() handler and already
2292 * checked the frozen bit.
2294 __netif_tx_lock(txq, cpu);
2295 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2296 __netif_tx_unlock(txq);
2300 static inline void netif_tx_lock_bh(struct net_device *dev)
2306 static inline void netif_tx_unlock(struct net_device *dev)
2310 for (i = 0; i < dev->num_tx_queues; i++) {
2311 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2313 /* No need to grab the _xmit_lock here. If the
2314 * queue is not stopped for another reason, we
2317 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2318 netif_schedule_queue(txq);
2320 spin_unlock(&dev->tx_global_lock);
2323 static inline void netif_tx_unlock_bh(struct net_device *dev)
2325 netif_tx_unlock(dev);
2329 #define HARD_TX_LOCK(dev, txq, cpu) { \
2330 if ((dev->features & NETIF_F_LLTX) == 0) { \
2331 __netif_tx_lock(txq, cpu); \
2335 #define HARD_TX_UNLOCK(dev, txq) { \
2336 if ((dev->features & NETIF_F_LLTX) == 0) { \
2337 __netif_tx_unlock(txq); \
2341 static inline void netif_tx_disable(struct net_device *dev)
2347 cpu = smp_processor_id();
2348 for (i = 0; i < dev->num_tx_queues; i++) {
2349 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2351 __netif_tx_lock(txq, cpu);
2352 netif_tx_stop_queue(txq);
2353 __netif_tx_unlock(txq);
2358 static inline void netif_addr_lock(struct net_device *dev)
2360 spin_lock(&dev->addr_list_lock);
2363 static inline void netif_addr_lock_bh(struct net_device *dev)
2365 spin_lock_bh(&dev->addr_list_lock);
2368 static inline void netif_addr_unlock(struct net_device *dev)
2370 spin_unlock(&dev->addr_list_lock);
2373 static inline void netif_addr_unlock_bh(struct net_device *dev)
2375 spin_unlock_bh(&dev->addr_list_lock);
2379 * dev_addrs walker. Should be used only for read access. Call with
2380 * rcu_read_lock held.
2382 #define for_each_dev_addr(dev, ha) \
2383 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2385 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2387 extern void ether_setup(struct net_device *dev);
2389 /* Support for loadable net-drivers */
2390 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2391 void (*setup)(struct net_device *),
2392 unsigned int txqs, unsigned int rxqs);
2393 #define alloc_netdev(sizeof_priv, name, setup) \
2394 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2396 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2397 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2399 extern int register_netdev(struct net_device *dev);
2400 extern void unregister_netdev(struct net_device *dev);
2402 /* General hardware address lists handling functions */
2403 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2404 struct netdev_hw_addr_list *from_list,
2405 int addr_len, unsigned char addr_type);
2406 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2407 struct netdev_hw_addr_list *from_list,
2408 int addr_len, unsigned char addr_type);
2409 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2410 struct netdev_hw_addr_list *from_list,
2412 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2413 struct netdev_hw_addr_list *from_list,
2415 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2416 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2418 /* Functions used for device addresses handling */
2419 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2420 unsigned char addr_type);
2421 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2422 unsigned char addr_type);
2423 extern int dev_addr_add_multiple(struct net_device *to_dev,
2424 struct net_device *from_dev,
2425 unsigned char addr_type);
2426 extern int dev_addr_del_multiple(struct net_device *to_dev,
2427 struct net_device *from_dev,
2428 unsigned char addr_type);
2429 extern void dev_addr_flush(struct net_device *dev);
2430 extern int dev_addr_init(struct net_device *dev);
2432 /* Functions used for unicast addresses handling */
2433 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2434 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2435 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2436 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2437 extern void dev_uc_flush(struct net_device *dev);
2438 extern void dev_uc_init(struct net_device *dev);
2440 /* Functions used for multicast addresses handling */
2441 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2442 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2443 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2444 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2445 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2446 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2447 extern void dev_mc_flush(struct net_device *dev);
2448 extern void dev_mc_init(struct net_device *dev);
2450 /* Functions used for secondary unicast and multicast support */
2451 extern void dev_set_rx_mode(struct net_device *dev);
2452 extern void __dev_set_rx_mode(struct net_device *dev);
2453 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2454 extern int dev_set_allmulti(struct net_device *dev, int inc);
2455 extern void netdev_state_change(struct net_device *dev);
2456 extern int netdev_bonding_change(struct net_device *dev,
2457 unsigned long event);
2458 extern void netdev_features_change(struct net_device *dev);
2459 /* Load a device via the kmod */
2460 extern void dev_load(struct net *net, const char *name);
2461 extern void dev_mcast_init(void);
2462 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2463 struct rtnl_link_stats64 *storage);
2465 extern int netdev_max_backlog;
2466 extern int netdev_tstamp_prequeue;
2467 extern int weight_p;
2468 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2469 extern int netdev_set_bond_master(struct net_device *dev,
2470 struct net_device *master);
2471 extern int skb_checksum_help(struct sk_buff *skb);
2472 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features);
2474 extern void netdev_rx_csum_fault(struct net_device *dev);
2476 static inline void netdev_rx_csum_fault(struct net_device *dev)
2480 /* rx skb timestamps */
2481 extern void net_enable_timestamp(void);
2482 extern void net_disable_timestamp(void);
2484 #ifdef CONFIG_PROC_FS
2485 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2486 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2487 extern void dev_seq_stop(struct seq_file *seq, void *v);
2490 extern int netdev_class_create_file(struct class_attribute *class_attr);
2491 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2493 extern struct kobj_ns_type_operations net_ns_type_operations;
2495 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2497 extern void linkwatch_run_queue(void);
2499 static inline u32 netdev_get_wanted_features(struct net_device *dev)
2501 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2503 u32 netdev_increment_features(u32 all, u32 one, u32 mask);
2504 u32 netdev_fix_features(struct net_device *dev, u32 features);
2505 void netdev_update_features(struct net_device *dev);
2507 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2508 struct net_device *dev);
2510 u32 netif_skb_features(struct sk_buff *skb);
2512 static inline int net_gso_ok(u32 features, int gso_type)
2514 int feature = gso_type << NETIF_F_GSO_SHIFT;
2515 return (features & feature) == feature;
2518 static inline int skb_gso_ok(struct sk_buff *skb, u32 features)
2520 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2521 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2524 static inline int netif_needs_gso(struct sk_buff *skb, int features)
2526 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2527 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2530 static inline void netif_set_gso_max_size(struct net_device *dev,
2533 dev->gso_max_size = size;
2536 static inline int netif_is_bond_slave(struct net_device *dev)
2538 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2541 extern struct pernet_operations __net_initdata loopback_net_ops;
2543 static inline int dev_ethtool_get_settings(struct net_device *dev,
2544 struct ethtool_cmd *cmd)
2546 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2548 return dev->ethtool_ops->get_settings(dev, cmd);
2551 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2553 if (dev->hw_features & NETIF_F_RXCSUM)
2554 return !!(dev->features & NETIF_F_RXCSUM);
2555 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2557 return dev->ethtool_ops->get_rx_csum(dev);
2560 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2562 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2564 return dev->ethtool_ops->get_flags(dev);
2567 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2569 /* netdev_printk helpers, similar to dev_printk */
2571 static inline const char *netdev_name(const struct net_device *dev)
2573 if (dev->reg_state != NETREG_REGISTERED)
2574 return "(unregistered net_device)";
2578 extern int netdev_printk(const char *level, const struct net_device *dev,
2579 const char *format, ...)
2580 __attribute__ ((format (printf, 3, 4)));
2581 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2582 __attribute__ ((format (printf, 2, 3)));
2583 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2584 __attribute__ ((format (printf, 2, 3)));
2585 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2586 __attribute__ ((format (printf, 2, 3)));
2587 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2588 __attribute__ ((format (printf, 2, 3)));
2589 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2590 __attribute__ ((format (printf, 2, 3)));
2591 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2592 __attribute__ ((format (printf, 2, 3)));
2593 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2594 __attribute__ ((format (printf, 2, 3)));
2596 #define MODULE_ALIAS_NETDEV(device) \
2597 MODULE_ALIAS("netdev-" device)
2600 #define netdev_dbg(__dev, format, args...) \
2601 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2602 #elif defined(CONFIG_DYNAMIC_DEBUG)
2603 #define netdev_dbg(__dev, format, args...) \
2605 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2606 netdev_name(__dev), ##args); \
2609 #define netdev_dbg(__dev, format, args...) \
2612 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2617 #if defined(VERBOSE_DEBUG)
2618 #define netdev_vdbg netdev_dbg
2621 #define netdev_vdbg(dev, format, args...) \
2624 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2630 * netdev_WARN() acts like dev_printk(), but with the key difference
2631 * of using a WARN/WARN_ON to get the message out, including the
2632 * file/line information and a backtrace.
2634 #define netdev_WARN(dev, format, args...) \
2635 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2637 /* netif printk helpers, similar to netdev_printk */
2639 #define netif_printk(priv, type, level, dev, fmt, args...) \
2641 if (netif_msg_##type(priv)) \
2642 netdev_printk(level, (dev), fmt, ##args); \
2645 #define netif_level(level, priv, type, dev, fmt, args...) \
2647 if (netif_msg_##type(priv)) \
2648 netdev_##level(dev, fmt, ##args); \
2651 #define netif_emerg(priv, type, dev, fmt, args...) \
2652 netif_level(emerg, priv, type, dev, fmt, ##args)
2653 #define netif_alert(priv, type, dev, fmt, args...) \
2654 netif_level(alert, priv, type, dev, fmt, ##args)
2655 #define netif_crit(priv, type, dev, fmt, args...) \
2656 netif_level(crit, priv, type, dev, fmt, ##args)
2657 #define netif_err(priv, type, dev, fmt, args...) \
2658 netif_level(err, priv, type, dev, fmt, ##args)
2659 #define netif_warn(priv, type, dev, fmt, args...) \
2660 netif_level(warn, priv, type, dev, fmt, ##args)
2661 #define netif_notice(priv, type, dev, fmt, args...) \
2662 netif_level(notice, priv, type, dev, fmt, ##args)
2663 #define netif_info(priv, type, dev, fmt, args...) \
2664 netif_level(info, priv, type, dev, fmt, ##args)
2667 #define netif_dbg(priv, type, dev, format, args...) \
2668 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2669 #elif defined(CONFIG_DYNAMIC_DEBUG)
2670 #define netif_dbg(priv, type, netdev, format, args...) \
2672 if (netif_msg_##type(priv)) \
2673 dynamic_dev_dbg((netdev)->dev.parent, \
2675 netdev_name(netdev), ##args); \
2678 #define netif_dbg(priv, type, dev, format, args...) \
2681 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2686 #if defined(VERBOSE_DEBUG)
2687 #define netif_vdbg netif_dbg
2689 #define netif_vdbg(priv, type, dev, format, args...) \
2692 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2697 #endif /* __KERNEL__ */
2699 #endif /* _LINUX_NETDEVICE_H */