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>
33 #include <linux/timer.h>
34 #include <linux/delay.h>
36 #include <asm/atomic.h>
37 #include <asm/cache.h>
38 #include <asm/byteorder.h>
40 #include <linux/device.h>
41 #include <linux/percpu.h>
42 #include <linux/dmaengine.h>
43 #include <linux/workqueue.h>
45 #include <linux/ethtool.h>
46 #include <net/net_namespace.h>
49 #include <net/dcbnl.h>
56 /* source back-compat hooks */
57 #define SET_ETHTOOL_OPS(netdev,ops) \
58 ( (netdev)->ethtool_ops = (ops) )
60 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
61 functions are available. */
62 #define HAVE_FREE_NETDEV /* free_netdev() */
63 #define HAVE_NETDEV_PRIV /* netdev_priv() */
65 #define NET_XMIT_SUCCESS 0
66 #define NET_XMIT_DROP 1 /* skb dropped */
67 #define NET_XMIT_CN 2 /* congestion notification */
68 #define NET_XMIT_POLICED 3 /* skb is shot by police */
69 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
74 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
75 #define NET_RX_CN_MOD 3 /* Storm on its way! */
76 #define NET_RX_CN_HIGH 4 /* The storm is here */
77 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
79 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
80 * indicates that the device will soon be dropping packets, or already drops
81 * some packets of the same priority; prompting us to send less aggressively. */
82 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
83 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
87 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
89 /* Driver transmit return codes */
90 #define NETDEV_TX_OK 0 /* driver took care of packet */
91 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
92 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
97 * Compute the worst case header length according to the protocols
101 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
102 # if defined(CONFIG_MAC80211_MESH)
103 # define LL_MAX_HEADER 128
105 # define LL_MAX_HEADER 96
107 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
108 # define LL_MAX_HEADER 48
110 # define LL_MAX_HEADER 32
113 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
114 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
115 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
116 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
117 #define MAX_HEADER LL_MAX_HEADER
119 #define MAX_HEADER (LL_MAX_HEADER + 48)
122 #endif /* __KERNEL__ */
125 * Network device statistics. Akin to the 2.0 ether stats but
126 * with byte counters.
129 struct net_device_stats
131 unsigned long rx_packets; /* total packets received */
132 unsigned long tx_packets; /* total packets transmitted */
133 unsigned long rx_bytes; /* total bytes received */
134 unsigned long tx_bytes; /* total bytes transmitted */
135 unsigned long rx_errors; /* bad packets received */
136 unsigned long tx_errors; /* packet transmit problems */
137 unsigned long rx_dropped; /* no space in linux buffers */
138 unsigned long tx_dropped; /* no space available in linux */
139 unsigned long multicast; /* multicast packets received */
140 unsigned long collisions;
142 /* detailed rx_errors: */
143 unsigned long rx_length_errors;
144 unsigned long rx_over_errors; /* receiver ring buff overflow */
145 unsigned long rx_crc_errors; /* recved pkt with crc error */
146 unsigned long rx_frame_errors; /* recv'd frame alignment error */
147 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
148 unsigned long rx_missed_errors; /* receiver missed packet */
150 /* detailed tx_errors */
151 unsigned long tx_aborted_errors;
152 unsigned long tx_carrier_errors;
153 unsigned long tx_fifo_errors;
154 unsigned long tx_heartbeat_errors;
155 unsigned long tx_window_errors;
158 unsigned long rx_compressed;
159 unsigned long tx_compressed;
163 /* Media selection options. */
176 #include <linux/cache.h>
177 #include <linux/skbuff.h>
183 struct netif_rx_stats
187 unsigned time_squeeze;
188 unsigned cpu_collision;
191 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
195 struct dev_addr_list *next;
196 u8 da_addr[MAX_ADDR_LEN];
204 * We tag multicasts with these structures.
207 #define dev_mc_list dev_addr_list
208 #define dmi_addr da_addr
209 #define dmi_addrlen da_addrlen
210 #define dmi_users da_users
211 #define dmi_gusers da_gusers
213 struct netdev_hw_addr {
214 struct list_head list;
215 unsigned char addr[MAX_ADDR_LEN];
217 #define NETDEV_HW_ADDR_T_LAN 1
218 #define NETDEV_HW_ADDR_T_SAN 2
219 #define NETDEV_HW_ADDR_T_SLAVE 3
220 struct rcu_head rcu_head;
225 struct hh_cache *hh_next; /* Next entry */
226 atomic_t hh_refcnt; /* number of users */
228 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
230 * They are mostly read, but hh_refcnt may be changed quite frequently,
231 * incurring cache line ping pongs.
233 __be16 hh_type ____cacheline_aligned_in_smp;
234 /* protocol identifier, f.e ETH_P_IP
235 * NOTE: For VLANs, this will be the
236 * encapuslated type. --BLG
238 u16 hh_len; /* length of header */
239 int (*hh_output)(struct sk_buff *skb);
242 /* cached hardware header; allow for machine alignment needs. */
243 #define HH_DATA_MOD 16
244 #define HH_DATA_OFF(__len) \
245 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
246 #define HH_DATA_ALIGN(__len) \
247 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
248 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
251 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
253 * dev->hard_header_len ? (dev->hard_header_len +
254 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
256 * We could use other alignment values, but we must maintain the
257 * relationship HH alignment <= LL alignment.
259 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
262 #define LL_RESERVED_SPACE(dev) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
265 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 #define LL_ALLOCATED_SPACE(dev) \
267 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
270 int (*create) (struct sk_buff *skb, struct net_device *dev,
271 unsigned short type, const void *daddr,
272 const void *saddr, unsigned len);
273 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
274 int (*rebuild)(struct sk_buff *skb);
275 #define HAVE_HEADER_CACHE
276 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
277 void (*cache_update)(struct hh_cache *hh,
278 const struct net_device *dev,
279 const unsigned char *haddr);
282 /* These flag bits are private to the generic network queueing
283 * layer, they may not be explicitly referenced by any other
290 __LINK_STATE_PRESENT,
291 __LINK_STATE_NOCARRIER,
292 __LINK_STATE_LINKWATCH_PENDING,
293 __LINK_STATE_DORMANT,
298 * This structure holds at boot time configured netdevice settings. They
299 * are then used in the device probing.
301 struct netdev_boot_setup {
305 #define NETDEV_BOOT_SETUP_MAX 8
307 extern int __init netdev_boot_setup(char *str);
310 * Structure for NAPI scheduling similar to tasklet but with weighting
313 /* The poll_list must only be managed by the entity which
314 * changes the state of the NAPI_STATE_SCHED bit. This means
315 * whoever atomically sets that bit can add this napi_struct
316 * to the per-cpu poll_list, and whoever clears that bit
317 * can remove from the list right before clearing the bit.
319 struct list_head poll_list;
323 int (*poll)(struct napi_struct *, int);
324 #ifdef CONFIG_NETPOLL
325 spinlock_t poll_lock;
329 unsigned int gro_count;
331 struct net_device *dev;
332 struct list_head dev_list;
333 struct sk_buff *gro_list;
339 NAPI_STATE_SCHED, /* Poll is scheduled */
340 NAPI_STATE_DISABLE, /* Disable pending */
341 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
352 extern void __napi_schedule(struct napi_struct *n);
354 static inline int napi_disable_pending(struct napi_struct *n)
356 return test_bit(NAPI_STATE_DISABLE, &n->state);
360 * napi_schedule_prep - check if napi can be scheduled
363 * Test if NAPI routine is already running, and if not mark
364 * it as running. This is used as a condition variable
365 * insure only one NAPI poll instance runs. We also make
366 * sure there is no pending NAPI disable.
368 static inline int napi_schedule_prep(struct napi_struct *n)
370 return !napi_disable_pending(n) &&
371 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
375 * napi_schedule - schedule NAPI poll
378 * Schedule NAPI poll routine to be called if it is not already
381 static inline void napi_schedule(struct napi_struct *n)
383 if (napi_schedule_prep(n))
387 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
388 static inline int napi_reschedule(struct napi_struct *napi)
390 if (napi_schedule_prep(napi)) {
391 __napi_schedule(napi);
398 * napi_complete - NAPI processing complete
401 * Mark NAPI processing as complete.
403 extern void __napi_complete(struct napi_struct *n);
404 extern void napi_complete(struct napi_struct *n);
407 * napi_disable - prevent NAPI from scheduling
410 * Stop NAPI from being scheduled on this context.
411 * Waits till any outstanding processing completes.
413 static inline void napi_disable(struct napi_struct *n)
415 set_bit(NAPI_STATE_DISABLE, &n->state);
416 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
418 clear_bit(NAPI_STATE_DISABLE, &n->state);
422 * napi_enable - enable NAPI scheduling
425 * Resume NAPI from being scheduled on this context.
426 * Must be paired with napi_disable.
428 static inline void napi_enable(struct napi_struct *n)
430 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
431 smp_mb__before_clear_bit();
432 clear_bit(NAPI_STATE_SCHED, &n->state);
437 * napi_synchronize - wait until NAPI is not running
440 * Wait until NAPI is done being scheduled on this context.
441 * Waits till any outstanding processing completes but
442 * does not disable future activations.
444 static inline void napi_synchronize(const struct napi_struct *n)
446 while (test_bit(NAPI_STATE_SCHED, &n->state))
450 # define napi_synchronize(n) barrier()
453 enum netdev_queue_state_t
456 __QUEUE_STATE_FROZEN,
459 struct netdev_queue {
463 struct net_device *dev;
466 struct Qdisc *qdisc_sleeping;
470 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
472 } ____cacheline_aligned_in_smp;
476 * This structure defines the management hooks for network devices.
477 * The following hooks can be defined; unless noted otherwise, they are
478 * optional and can be filled with a null pointer.
480 * int (*ndo_init)(struct net_device *dev);
481 * This function is called once when network device is registered.
482 * The network device can use this to any late stage initializaton
483 * or semantic validattion. It can fail with an error code which will
484 * be propogated back to register_netdev
486 * void (*ndo_uninit)(struct net_device *dev);
487 * This function is called when device is unregistered or when registration
488 * fails. It is not called if init fails.
490 * int (*ndo_open)(struct net_device *dev);
491 * This function is called when network device transistions to the up
494 * int (*ndo_stop)(struct net_device *dev);
495 * This function is called when network device transistions to the down
498 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
499 * Called when a packet needs to be transmitted.
500 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
501 * Required can not be NULL.
503 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
504 * Called to decide which queue to when device supports multiple
507 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
508 * This function is called to allow device receiver to make
509 * changes to configuration when multicast or promiscious is enabled.
511 * void (*ndo_set_rx_mode)(struct net_device *dev);
512 * This function is called device changes address list filtering.
514 * void (*ndo_set_multicast_list)(struct net_device *dev);
515 * This function is called when the multicast address list changes.
517 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
518 * This function is called when the Media Access Control address
519 * needs to be changed. If this interface is not defined, the
520 * mac address can not be changed.
522 * int (*ndo_validate_addr)(struct net_device *dev);
523 * Test if Media Access Control address is valid for the device.
525 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
526 * Called when a user request an ioctl which can't be handled by
527 * the generic interface code. If not defined ioctl's return
528 * not supported error code.
530 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
531 * Used to set network devices bus interface parameters. This interface
532 * is retained for legacy reason, new devices should use the bus
533 * interface (PCI) for low level management.
535 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
536 * Called when a user wants to change the Maximum Transfer Unit
537 * of a device. If not defined, any request to change MTU will
538 * will return an error.
540 * void (*ndo_tx_timeout)(struct net_device *dev);
541 * Callback uses when the transmitter has not made any progress
542 * for dev->watchdog ticks.
544 * struct net_device_stats* (*get_stats)(struct net_device *dev);
545 * Called when a user wants to get the network device usage
546 * statistics. If not defined, the counters in dev->stats will
549 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
550 * If device support VLAN receive accleration
551 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
552 * when vlan groups for the device changes. Note: grp is NULL
553 * if no vlan's groups are being used.
555 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
556 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
557 * this function is called when a VLAN id is registered.
559 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
560 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
561 * this function is called when a VLAN id is unregistered.
563 * void (*ndo_poll_controller)(struct net_device *dev);
565 #define HAVE_NET_DEVICE_OPS
566 struct net_device_ops {
567 int (*ndo_init)(struct net_device *dev);
568 void (*ndo_uninit)(struct net_device *dev);
569 int (*ndo_open)(struct net_device *dev);
570 int (*ndo_stop)(struct net_device *dev);
571 int (*ndo_start_xmit) (struct sk_buff *skb,
572 struct net_device *dev);
573 u16 (*ndo_select_queue)(struct net_device *dev,
574 struct sk_buff *skb);
575 #define HAVE_CHANGE_RX_FLAGS
576 void (*ndo_change_rx_flags)(struct net_device *dev,
578 #define HAVE_SET_RX_MODE
579 void (*ndo_set_rx_mode)(struct net_device *dev);
580 #define HAVE_MULTICAST
581 void (*ndo_set_multicast_list)(struct net_device *dev);
582 #define HAVE_SET_MAC_ADDR
583 int (*ndo_set_mac_address)(struct net_device *dev,
585 #define HAVE_VALIDATE_ADDR
586 int (*ndo_validate_addr)(struct net_device *dev);
587 #define HAVE_PRIVATE_IOCTL
588 int (*ndo_do_ioctl)(struct net_device *dev,
589 struct ifreq *ifr, int cmd);
590 #define HAVE_SET_CONFIG
591 int (*ndo_set_config)(struct net_device *dev,
593 #define HAVE_CHANGE_MTU
594 int (*ndo_change_mtu)(struct net_device *dev,
596 int (*ndo_neigh_setup)(struct net_device *dev,
597 struct neigh_parms *);
598 #define HAVE_TX_TIMEOUT
599 void (*ndo_tx_timeout) (struct net_device *dev);
601 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
603 void (*ndo_vlan_rx_register)(struct net_device *dev,
604 struct vlan_group *grp);
605 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
607 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
609 #ifdef CONFIG_NET_POLL_CONTROLLER
610 #define HAVE_NETDEV_POLL
611 void (*ndo_poll_controller)(struct net_device *dev);
613 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
614 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
616 struct scatterlist *sgl,
618 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
624 * The DEVICE structure.
625 * Actually, this whole structure is a big mistake. It mixes I/O
626 * data with strictly "high-level" data, and it has to know about
627 * almost every data structure used in the INET module.
629 * FIXME: cleanup struct net_device such that network protocol info
637 * This is the first field of the "visible" part of this structure
638 * (i.e. as seen by users in the "Space.c" file). It is the name
642 /* device name hash chain */
643 struct hlist_node name_hlist;
648 * I/O specific fields
649 * FIXME: Merge these and struct ifmap into one
651 unsigned long mem_end; /* shared mem end */
652 unsigned long mem_start; /* shared mem start */
653 unsigned long base_addr; /* device I/O address */
654 unsigned int irq; /* device IRQ number */
657 * Some hardware also needs these fields, but they are not
658 * part of the usual set specified in Space.c.
661 unsigned char if_port; /* Selectable AUI, TP,..*/
662 unsigned char dma; /* DMA channel */
666 struct list_head dev_list;
667 struct list_head napi_list;
669 /* Net device features */
670 unsigned long features;
671 #define NETIF_F_SG 1 /* Scatter/gather IO. */
672 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
673 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
674 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
675 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
676 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
677 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
678 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
679 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
680 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
681 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
682 #define NETIF_F_GSO 2048 /* Enable software GSO. */
683 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
684 /* do not use LLTX in new drivers */
685 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
686 #define NETIF_F_GRO 16384 /* Generic receive offload */
687 #define NETIF_F_LRO 32768 /* large receive offload */
689 /* the GSO_MASK reserves bits 16 through 23 */
690 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
691 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
693 /* Segmentation offload features */
694 #define NETIF_F_GSO_SHIFT 16
695 #define NETIF_F_GSO_MASK 0x00ff0000
696 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
697 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
698 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
699 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
700 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
701 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
703 /* List of features with software fallbacks. */
704 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
707 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
708 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
709 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
710 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
713 * If one device supports one of these features, then enable them
714 * for all in netdev_increment_features.
716 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
717 NETIF_F_SG | NETIF_F_HIGHDMA | \
720 /* Interface index. Unique device identifier */
724 struct net_device_stats stats;
726 #ifdef CONFIG_WIRELESS_EXT
727 /* List of functions to handle Wireless Extensions (instead of ioctl).
728 * See <net/iw_handler.h> for details. Jean II */
729 const struct iw_handler_def * wireless_handlers;
730 /* Instance data managed by the core of Wireless Extensions. */
731 struct iw_public_data * wireless_data;
733 /* Management operations */
734 const struct net_device_ops *netdev_ops;
735 const struct ethtool_ops *ethtool_ops;
737 /* Hardware header description */
738 const struct header_ops *header_ops;
740 unsigned int flags; /* interface flags (a la BSD) */
741 unsigned short gflags;
742 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
743 unsigned short padded; /* How much padding added by alloc_netdev() */
745 unsigned char operstate; /* RFC2863 operstate */
746 unsigned char link_mode; /* mapping policy to operstate */
748 unsigned mtu; /* interface MTU value */
749 unsigned short type; /* interface hardware type */
750 unsigned short hard_header_len; /* hardware hdr length */
752 /* extra head- and tailroom the hardware may need, but not in all cases
753 * can this be guaranteed, especially tailroom. Some cases also use
754 * LL_MAX_HEADER instead to allocate the skb.
756 unsigned short needed_headroom;
757 unsigned short needed_tailroom;
759 struct net_device *master; /* Pointer to master device of a group,
760 * which this device is member of.
763 /* Interface address info. */
764 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
765 unsigned char addr_len; /* hardware address length */
766 unsigned short dev_id; /* for shared network cards */
768 spinlock_t addr_list_lock;
769 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
770 int uc_count; /* Number of installed ucasts */
772 struct dev_addr_list *mc_list; /* Multicast mac addresses */
773 int mc_count; /* Number of installed mcasts */
774 unsigned int promiscuity;
775 unsigned int allmulti;
778 /* Protocol specific pointers */
780 #ifdef CONFIG_NET_DSA
781 void *dsa_ptr; /* dsa specific data */
783 void *atalk_ptr; /* AppleTalk link */
784 void *ip_ptr; /* IPv4 specific data */
785 void *dn_ptr; /* DECnet specific data */
786 void *ip6_ptr; /* IPv6 specific data */
787 void *ec_ptr; /* Econet specific data */
788 void *ax25_ptr; /* AX.25 specific data */
789 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
790 assign before registering */
793 * Cache line mostly used on receive path (including eth_type_trans())
795 unsigned long last_rx; /* Time of last Rx */
796 /* Interface address info used in eth_type_trans() */
797 unsigned char *dev_addr; /* hw address, (before bcast
798 because most packets are
801 struct list_head dev_addr_list; /* list of device hw addresses */
803 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
805 struct netdev_queue rx_queue;
807 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
809 /* Number of TX queues allocated at alloc_netdev_mq() time */
810 unsigned int num_tx_queues;
812 /* Number of TX queues currently active in device */
813 unsigned int real_num_tx_queues;
815 unsigned long tx_queue_len; /* Max frames per queue allowed */
816 spinlock_t tx_global_lock;
818 * One part is mostly used on xmit path (device)
820 /* These may be needed for future network-power-down code. */
821 unsigned long trans_start; /* Time (in jiffies) of last Tx */
823 int watchdog_timeo; /* used by dev_watchdog() */
824 struct timer_list watchdog_timer;
826 /* Number of references to this device */
827 atomic_t refcnt ____cacheline_aligned_in_smp;
829 /* delayed register/unregister */
830 struct list_head todo_list;
831 /* device index hash chain */
832 struct hlist_node index_hlist;
834 struct net_device *link_watch_next;
836 /* register/unregister state machine */
837 enum { NETREG_UNINITIALIZED=0,
838 NETREG_REGISTERED, /* completed register_netdevice */
839 NETREG_UNREGISTERING, /* called unregister_netdevice */
840 NETREG_UNREGISTERED, /* completed unregister todo */
841 NETREG_RELEASED, /* called free_netdev */
842 NETREG_DUMMY, /* dummy device for NAPI poll */
845 /* Called from unregister, can be used to call free_netdev */
846 void (*destructor)(struct net_device *dev);
848 #ifdef CONFIG_NETPOLL
849 struct netpoll_info *npinfo;
853 /* Network namespace this network device is inside */
857 /* mid-layer private */
861 struct net_bridge_port *br_port;
863 struct macvlan_port *macvlan_port;
865 struct garp_port *garp_port;
867 /* class/net/name entry */
869 /* space for optional statistics and wireless sysfs groups */
870 struct attribute_group *sysfs_groups[3];
872 /* rtnetlink link ops */
873 const struct rtnl_link_ops *rtnl_link_ops;
875 /* VLAN feature mask */
876 unsigned long vlan_features;
878 /* for setting kernel sock attribute on TCP connection setup */
879 #define GSO_MAX_SIZE 65536
880 unsigned int gso_max_size;
883 /* Data Center Bridging netlink ops */
884 struct dcbnl_rtnl_ops *dcbnl_ops;
887 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
888 /* max exchange id for FCoE LRO by ddp */
889 unsigned int fcoe_ddp_xid;
892 #ifdef CONFIG_COMPAT_NET_DEV_OPS
894 int (*init)(struct net_device *dev);
895 void (*uninit)(struct net_device *dev);
896 int (*open)(struct net_device *dev);
897 int (*stop)(struct net_device *dev);
898 int (*hard_start_xmit) (struct sk_buff *skb,
899 struct net_device *dev);
900 u16 (*select_queue)(struct net_device *dev,
901 struct sk_buff *skb);
902 void (*change_rx_flags)(struct net_device *dev,
904 void (*set_rx_mode)(struct net_device *dev);
905 void (*set_multicast_list)(struct net_device *dev);
906 int (*set_mac_address)(struct net_device *dev,
908 int (*validate_addr)(struct net_device *dev);
909 int (*do_ioctl)(struct net_device *dev,
910 struct ifreq *ifr, int cmd);
911 int (*set_config)(struct net_device *dev,
913 int (*change_mtu)(struct net_device *dev, int new_mtu);
914 int (*neigh_setup)(struct net_device *dev,
915 struct neigh_parms *);
916 void (*tx_timeout) (struct net_device *dev);
917 struct net_device_stats* (*get_stats)(struct net_device *dev);
918 void (*vlan_rx_register)(struct net_device *dev,
919 struct vlan_group *grp);
920 void (*vlan_rx_add_vid)(struct net_device *dev,
922 void (*vlan_rx_kill_vid)(struct net_device *dev,
924 #ifdef CONFIG_NET_POLL_CONTROLLER
925 void (*poll_controller)(struct net_device *dev);
930 #define to_net_dev(d) container_of(d, struct net_device, dev)
932 #define NETDEV_ALIGN 32
933 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
936 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
939 return &dev->_tx[index];
942 static inline void netdev_for_each_tx_queue(struct net_device *dev,
943 void (*f)(struct net_device *,
944 struct netdev_queue *,
950 for (i = 0; i < dev->num_tx_queues; i++)
951 f(dev, &dev->_tx[i], arg);
955 * Net namespace inlines
958 struct net *dev_net(const struct net_device *dev)
968 void dev_net_set(struct net_device *dev, struct net *net)
971 release_net(dev->nd_net);
972 dev->nd_net = hold_net(net);
976 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
978 #ifdef CONFIG_NET_DSA_TAG_DSA
979 if (dev->dsa_ptr != NULL)
980 return dsa_uses_dsa_tags(dev->dsa_ptr);
986 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
988 #ifdef CONFIG_NET_DSA_TAG_TRAILER
989 if (dev->dsa_ptr != NULL)
990 return dsa_uses_trailer_tags(dev->dsa_ptr);
997 * netdev_priv - access network device private data
998 * @dev: network device
1000 * Get network device private data
1002 static inline void *netdev_priv(const struct net_device *dev)
1004 return (char *)dev + ((sizeof(struct net_device)
1005 + NETDEV_ALIGN_CONST)
1006 & ~NETDEV_ALIGN_CONST);
1009 /* Set the sysfs physical device reference for the network logical device
1010 * if set prior to registration will cause a symlink during initialization.
1012 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1015 * netif_napi_add - initialize a napi context
1016 * @dev: network device
1017 * @napi: napi context
1018 * @poll: polling function
1019 * @weight: default weight
1021 * netif_napi_add() must be used to initialize a napi context prior to calling
1022 * *any* of the other napi related functions.
1024 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1025 int (*poll)(struct napi_struct *, int), int weight);
1028 * netif_napi_del - remove a napi context
1029 * @napi: napi context
1031 * netif_napi_del() removes a napi context from the network device napi list
1033 void netif_napi_del(struct napi_struct *napi);
1035 struct napi_gro_cb {
1036 /* This indicates where we are processing relative to skb->data. */
1039 /* This is non-zero if the packet may be of the same flow. */
1042 /* This is non-zero if the packet cannot be merged with the new skb. */
1045 /* Number of segments aggregated. */
1052 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1054 struct packet_type {
1055 __be16 type; /* This is really htons(ether_type). */
1056 struct net_device *dev; /* NULL is wildcarded here */
1057 int (*func) (struct sk_buff *,
1058 struct net_device *,
1059 struct packet_type *,
1060 struct net_device *);
1061 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1063 int (*gso_send_check)(struct sk_buff *skb);
1064 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1065 struct sk_buff *skb);
1066 int (*gro_complete)(struct sk_buff *skb);
1067 void *af_packet_priv;
1068 struct list_head list;
1071 #include <linux/interrupt.h>
1072 #include <linux/notifier.h>
1074 extern rwlock_t dev_base_lock; /* Device list lock */
1077 #define for_each_netdev(net, d) \
1078 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1079 #define for_each_netdev_safe(net, d, n) \
1080 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1081 #define for_each_netdev_continue(net, d) \
1082 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1083 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1085 static inline struct net_device *next_net_device(struct net_device *dev)
1087 struct list_head *lh;
1091 lh = dev->dev_list.next;
1092 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1095 static inline struct net_device *first_net_device(struct net *net)
1097 return list_empty(&net->dev_base_head) ? NULL :
1098 net_device_entry(net->dev_base_head.next);
1101 extern int netdev_boot_setup_check(struct net_device *dev);
1102 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1103 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1104 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1105 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1106 extern void dev_add_pack(struct packet_type *pt);
1107 extern void dev_remove_pack(struct packet_type *pt);
1108 extern void __dev_remove_pack(struct packet_type *pt);
1110 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1111 unsigned short mask);
1112 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1113 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1114 extern int dev_alloc_name(struct net_device *dev, const char *name);
1115 extern int dev_open(struct net_device *dev);
1116 extern int dev_close(struct net_device *dev);
1117 extern void dev_disable_lro(struct net_device *dev);
1118 extern int dev_queue_xmit(struct sk_buff *skb);
1119 extern int register_netdevice(struct net_device *dev);
1120 extern void unregister_netdevice(struct net_device *dev);
1121 extern void free_netdev(struct net_device *dev);
1122 extern void synchronize_net(void);
1123 extern int register_netdevice_notifier(struct notifier_block *nb);
1124 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1125 extern int init_dummy_netdev(struct net_device *dev);
1126 extern void netdev_resync_ops(struct net_device *dev);
1128 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1129 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1130 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1131 extern int dev_restart(struct net_device *dev);
1132 #ifdef CONFIG_NETPOLL_TRAP
1133 extern int netpoll_trap(void);
1135 extern void *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
1136 extern int skb_gro_receive(struct sk_buff **head,
1137 struct sk_buff *skb);
1139 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1141 return NAPI_GRO_CB(skb)->data_offset;
1144 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1146 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1149 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1151 NAPI_GRO_CB(skb)->data_offset += len;
1154 static inline void skb_gro_reset_offset(struct sk_buff *skb)
1156 NAPI_GRO_CB(skb)->data_offset = 0;
1159 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1161 return skb_headlen(skb) ? skb_mac_header(skb) :
1162 page_address(skb_shinfo(skb)->frags[0].page) +
1163 skb_shinfo(skb)->frags[0].page_offset;
1166 static inline void *skb_gro_network_header(struct sk_buff *skb)
1168 return skb_headlen(skb) ? skb_network_header(skb) :
1169 page_address(skb_shinfo(skb)->frags[0].page) +
1170 skb_shinfo(skb)->frags[0].page_offset + skb_network_offset(skb);
1173 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1174 unsigned short type,
1175 const void *daddr, const void *saddr,
1178 if (!dev->header_ops || !dev->header_ops->create)
1181 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1184 static inline int dev_parse_header(const struct sk_buff *skb,
1185 unsigned char *haddr)
1187 const struct net_device *dev = skb->dev;
1189 if (!dev->header_ops || !dev->header_ops->parse)
1191 return dev->header_ops->parse(skb, haddr);
1194 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1195 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1196 static inline int unregister_gifconf(unsigned int family)
1198 return register_gifconf(family, NULL);
1202 * Incoming packets are placed on per-cpu queues so that
1203 * no locking is needed.
1207 struct Qdisc *output_queue;
1208 struct sk_buff_head input_pkt_queue;
1209 struct list_head poll_list;
1210 struct sk_buff *completion_queue;
1212 struct napi_struct backlog;
1215 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1217 #define HAVE_NETIF_QUEUE
1219 extern void __netif_schedule(struct Qdisc *q);
1221 static inline void netif_schedule_queue(struct netdev_queue *txq)
1223 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1224 __netif_schedule(txq->qdisc);
1227 static inline void netif_tx_schedule_all(struct net_device *dev)
1231 for (i = 0; i < dev->num_tx_queues; i++)
1232 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1235 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1237 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1241 * netif_start_queue - allow transmit
1242 * @dev: network device
1244 * Allow upper layers to call the device hard_start_xmit routine.
1246 static inline void netif_start_queue(struct net_device *dev)
1248 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1251 static inline void netif_tx_start_all_queues(struct net_device *dev)
1255 for (i = 0; i < dev->num_tx_queues; i++) {
1256 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1257 netif_tx_start_queue(txq);
1261 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1263 #ifdef CONFIG_NETPOLL_TRAP
1264 if (netpoll_trap()) {
1265 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1269 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1270 __netif_schedule(dev_queue->qdisc);
1274 * netif_wake_queue - restart transmit
1275 * @dev: network device
1277 * Allow upper layers to call the device hard_start_xmit routine.
1278 * Used for flow control when transmit resources are available.
1280 static inline void netif_wake_queue(struct net_device *dev)
1282 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1285 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1289 for (i = 0; i < dev->num_tx_queues; i++) {
1290 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1291 netif_tx_wake_queue(txq);
1295 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1297 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1301 * netif_stop_queue - stop transmitted packets
1302 * @dev: network device
1304 * Stop upper layers calling the device hard_start_xmit routine.
1305 * Used for flow control when transmit resources are unavailable.
1307 static inline void netif_stop_queue(struct net_device *dev)
1309 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1312 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1316 for (i = 0; i < dev->num_tx_queues; i++) {
1317 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1318 netif_tx_stop_queue(txq);
1322 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1324 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1328 * netif_queue_stopped - test if transmit queue is flowblocked
1329 * @dev: network device
1331 * Test if transmit queue on device is currently unable to send.
1333 static inline int netif_queue_stopped(const struct net_device *dev)
1335 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1338 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1340 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1344 * netif_running - test if up
1345 * @dev: network device
1347 * Test if the device has been brought up.
1349 static inline int netif_running(const struct net_device *dev)
1351 return test_bit(__LINK_STATE_START, &dev->state);
1355 * Routines to manage the subqueues on a device. We only need start
1356 * stop, and a check if it's stopped. All other device management is
1357 * done at the overall netdevice level.
1358 * Also test the device if we're multiqueue.
1362 * netif_start_subqueue - allow sending packets on subqueue
1363 * @dev: network device
1364 * @queue_index: sub queue index
1366 * Start individual transmit queue of a device with multiple transmit queues.
1368 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1370 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1371 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1375 * netif_stop_subqueue - stop sending packets on subqueue
1376 * @dev: network device
1377 * @queue_index: sub queue index
1379 * Stop individual transmit queue of a device with multiple transmit queues.
1381 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1383 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1384 #ifdef CONFIG_NETPOLL_TRAP
1388 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1392 * netif_subqueue_stopped - test status of subqueue
1393 * @dev: network device
1394 * @queue_index: sub queue index
1396 * Check individual transmit queue of a device with multiple transmit queues.
1398 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1401 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1402 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1405 static inline int netif_subqueue_stopped(const struct net_device *dev,
1406 struct sk_buff *skb)
1408 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1412 * netif_wake_subqueue - allow sending packets on subqueue
1413 * @dev: network device
1414 * @queue_index: sub queue index
1416 * Resume individual transmit queue of a device with multiple transmit queues.
1418 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1420 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1421 #ifdef CONFIG_NETPOLL_TRAP
1425 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1426 __netif_schedule(txq->qdisc);
1430 * netif_is_multiqueue - test if device has multiple transmit queues
1431 * @dev: network device
1433 * Check if device has multiple transmit queues
1435 static inline int netif_is_multiqueue(const struct net_device *dev)
1437 return (dev->num_tx_queues > 1);
1440 /* Use this variant when it is known for sure that it
1441 * is executing from hardware interrupt context or with hardware interrupts
1444 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1446 /* Use this variant in places where it could be invoked
1447 * from either hardware interrupt or other context, with hardware interrupts
1448 * either disabled or enabled.
1450 extern void dev_kfree_skb_any(struct sk_buff *skb);
1452 #define HAVE_NETIF_RX 1
1453 extern int netif_rx(struct sk_buff *skb);
1454 extern int netif_rx_ni(struct sk_buff *skb);
1455 #define HAVE_NETIF_RECEIVE_SKB 1
1456 extern int netif_receive_skb(struct sk_buff *skb);
1457 extern void napi_gro_flush(struct napi_struct *napi);
1458 extern int dev_gro_receive(struct napi_struct *napi,
1459 struct sk_buff *skb);
1460 extern int napi_skb_finish(int ret, struct sk_buff *skb);
1461 extern int napi_gro_receive(struct napi_struct *napi,
1462 struct sk_buff *skb);
1463 extern void napi_reuse_skb(struct napi_struct *napi,
1464 struct sk_buff *skb);
1465 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1466 extern int napi_frags_finish(struct napi_struct *napi,
1467 struct sk_buff *skb, int ret);
1468 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1469 extern int napi_gro_frags(struct napi_struct *napi);
1471 static inline void napi_free_frags(struct napi_struct *napi)
1473 kfree_skb(napi->skb);
1477 extern void netif_nit_deliver(struct sk_buff *skb);
1478 extern int dev_valid_name(const char *name);
1479 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1480 extern int dev_ethtool(struct net *net, struct ifreq *);
1481 extern unsigned dev_get_flags(const struct net_device *);
1482 extern int dev_change_flags(struct net_device *, unsigned);
1483 extern int dev_change_name(struct net_device *, const char *);
1484 extern int dev_set_alias(struct net_device *, const char *, size_t);
1485 extern int dev_change_net_namespace(struct net_device *,
1486 struct net *, const char *);
1487 extern int dev_set_mtu(struct net_device *, int);
1488 extern int dev_set_mac_address(struct net_device *,
1490 extern int dev_hard_start_xmit(struct sk_buff *skb,
1491 struct net_device *dev,
1492 struct netdev_queue *txq);
1494 extern int netdev_budget;
1496 /* Called by rtnetlink.c:rtnl_unlock() */
1497 extern void netdev_run_todo(void);
1500 * dev_put - release reference to device
1501 * @dev: network device
1503 * Release reference to device to allow it to be freed.
1505 static inline void dev_put(struct net_device *dev)
1507 atomic_dec(&dev->refcnt);
1511 * dev_hold - get reference to device
1512 * @dev: network device
1514 * Hold reference to device to keep it from being freed.
1516 static inline void dev_hold(struct net_device *dev)
1518 atomic_inc(&dev->refcnt);
1521 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1522 * and _off may be called from IRQ context, but it is caller
1523 * who is responsible for serialization of these calls.
1525 * The name carrier is inappropriate, these functions should really be
1526 * called netif_lowerlayer_*() because they represent the state of any
1527 * kind of lower layer not just hardware media.
1530 extern void linkwatch_fire_event(struct net_device *dev);
1533 * netif_carrier_ok - test if carrier present
1534 * @dev: network device
1536 * Check if carrier is present on device
1538 static inline int netif_carrier_ok(const struct net_device *dev)
1540 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1543 extern void __netdev_watchdog_up(struct net_device *dev);
1545 extern void netif_carrier_on(struct net_device *dev);
1547 extern void netif_carrier_off(struct net_device *dev);
1550 * netif_dormant_on - mark device as dormant.
1551 * @dev: network device
1553 * Mark device as dormant (as per RFC2863).
1555 * The dormant state indicates that the relevant interface is not
1556 * actually in a condition to pass packets (i.e., it is not 'up') but is
1557 * in a "pending" state, waiting for some external event. For "on-
1558 * demand" interfaces, this new state identifies the situation where the
1559 * interface is waiting for events to place it in the up state.
1562 static inline void netif_dormant_on(struct net_device *dev)
1564 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1565 linkwatch_fire_event(dev);
1569 * netif_dormant_off - set device as not dormant.
1570 * @dev: network device
1572 * Device is not in dormant state.
1574 static inline void netif_dormant_off(struct net_device *dev)
1576 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1577 linkwatch_fire_event(dev);
1581 * netif_dormant - test if carrier present
1582 * @dev: network device
1584 * Check if carrier is present on device
1586 static inline int netif_dormant(const struct net_device *dev)
1588 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1593 * netif_oper_up - test if device is operational
1594 * @dev: network device
1596 * Check if carrier is operational
1598 static inline int netif_oper_up(const struct net_device *dev) {
1599 return (dev->operstate == IF_OPER_UP ||
1600 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1604 * netif_device_present - is device available or removed
1605 * @dev: network device
1607 * Check if device has not been removed from system.
1609 static inline int netif_device_present(struct net_device *dev)
1611 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1614 extern void netif_device_detach(struct net_device *dev);
1616 extern void netif_device_attach(struct net_device *dev);
1619 * Network interface message level settings
1621 #define HAVE_NETIF_MSG 1
1624 NETIF_MSG_DRV = 0x0001,
1625 NETIF_MSG_PROBE = 0x0002,
1626 NETIF_MSG_LINK = 0x0004,
1627 NETIF_MSG_TIMER = 0x0008,
1628 NETIF_MSG_IFDOWN = 0x0010,
1629 NETIF_MSG_IFUP = 0x0020,
1630 NETIF_MSG_RX_ERR = 0x0040,
1631 NETIF_MSG_TX_ERR = 0x0080,
1632 NETIF_MSG_TX_QUEUED = 0x0100,
1633 NETIF_MSG_INTR = 0x0200,
1634 NETIF_MSG_TX_DONE = 0x0400,
1635 NETIF_MSG_RX_STATUS = 0x0800,
1636 NETIF_MSG_PKTDATA = 0x1000,
1637 NETIF_MSG_HW = 0x2000,
1638 NETIF_MSG_WOL = 0x4000,
1641 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1642 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1643 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1644 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1645 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1646 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1647 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1648 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1649 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1650 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1651 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1652 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1653 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1654 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1655 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1657 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1660 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1661 return default_msg_enable_bits;
1662 if (debug_value == 0) /* no output */
1664 /* set low N bits */
1665 return (1 << debug_value) - 1;
1668 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1670 spin_lock(&txq->_xmit_lock);
1671 txq->xmit_lock_owner = cpu;
1674 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1676 spin_lock_bh(&txq->_xmit_lock);
1677 txq->xmit_lock_owner = smp_processor_id();
1680 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1682 int ok = spin_trylock(&txq->_xmit_lock);
1684 txq->xmit_lock_owner = smp_processor_id();
1688 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1690 txq->xmit_lock_owner = -1;
1691 spin_unlock(&txq->_xmit_lock);
1694 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1696 txq->xmit_lock_owner = -1;
1697 spin_unlock_bh(&txq->_xmit_lock);
1701 * netif_tx_lock - grab network device transmit lock
1702 * @dev: network device
1704 * Get network device transmit lock
1706 static inline void netif_tx_lock(struct net_device *dev)
1711 spin_lock(&dev->tx_global_lock);
1712 cpu = smp_processor_id();
1713 for (i = 0; i < dev->num_tx_queues; i++) {
1714 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1716 /* We are the only thread of execution doing a
1717 * freeze, but we have to grab the _xmit_lock in
1718 * order to synchronize with threads which are in
1719 * the ->hard_start_xmit() handler and already
1720 * checked the frozen bit.
1722 __netif_tx_lock(txq, cpu);
1723 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1724 __netif_tx_unlock(txq);
1728 static inline void netif_tx_lock_bh(struct net_device *dev)
1734 static inline void netif_tx_unlock(struct net_device *dev)
1738 for (i = 0; i < dev->num_tx_queues; i++) {
1739 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1741 /* No need to grab the _xmit_lock here. If the
1742 * queue is not stopped for another reason, we
1745 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1746 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1747 __netif_schedule(txq->qdisc);
1749 spin_unlock(&dev->tx_global_lock);
1752 static inline void netif_tx_unlock_bh(struct net_device *dev)
1754 netif_tx_unlock(dev);
1758 #define HARD_TX_LOCK(dev, txq, cpu) { \
1759 if ((dev->features & NETIF_F_LLTX) == 0) { \
1760 __netif_tx_lock(txq, cpu); \
1764 #define HARD_TX_UNLOCK(dev, txq) { \
1765 if ((dev->features & NETIF_F_LLTX) == 0) { \
1766 __netif_tx_unlock(txq); \
1770 static inline void netif_tx_disable(struct net_device *dev)
1776 cpu = smp_processor_id();
1777 for (i = 0; i < dev->num_tx_queues; i++) {
1778 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1780 __netif_tx_lock(txq, cpu);
1781 netif_tx_stop_queue(txq);
1782 __netif_tx_unlock(txq);
1787 static inline void netif_addr_lock(struct net_device *dev)
1789 spin_lock(&dev->addr_list_lock);
1792 static inline void netif_addr_lock_bh(struct net_device *dev)
1794 spin_lock_bh(&dev->addr_list_lock);
1797 static inline void netif_addr_unlock(struct net_device *dev)
1799 spin_unlock(&dev->addr_list_lock);
1802 static inline void netif_addr_unlock_bh(struct net_device *dev)
1804 spin_unlock_bh(&dev->addr_list_lock);
1808 * dev_addr_list walker. Should be used only for read access. Call with
1809 * rcu_read_lock held.
1811 #define for_each_dev_addr(dev, ha) \
1812 list_for_each_entry_rcu(ha, &dev->dev_addr_list, list)
1814 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1816 extern void ether_setup(struct net_device *dev);
1818 /* Support for loadable net-drivers */
1819 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1820 void (*setup)(struct net_device *),
1821 unsigned int queue_count);
1822 #define alloc_netdev(sizeof_priv, name, setup) \
1823 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1824 extern int register_netdev(struct net_device *dev);
1825 extern void unregister_netdev(struct net_device *dev);
1827 /* Functions used for device addresses handling */
1828 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1829 unsigned char addr_type);
1830 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1831 unsigned char addr_type);
1832 extern int dev_addr_add_multiple(struct net_device *to_dev,
1833 struct net_device *from_dev,
1834 unsigned char addr_type);
1835 extern int dev_addr_del_multiple(struct net_device *to_dev,
1836 struct net_device *from_dev,
1837 unsigned char addr_type);
1839 /* Functions used for secondary unicast and multicast support */
1840 extern void dev_set_rx_mode(struct net_device *dev);
1841 extern void __dev_set_rx_mode(struct net_device *dev);
1842 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1843 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1844 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1845 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1846 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1847 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1848 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1849 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1850 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1851 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1852 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1853 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1854 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1855 extern int dev_set_allmulti(struct net_device *dev, int inc);
1856 extern void netdev_state_change(struct net_device *dev);
1857 extern void netdev_bonding_change(struct net_device *dev);
1858 extern void netdev_features_change(struct net_device *dev);
1859 /* Load a device via the kmod */
1860 extern void dev_load(struct net *net, const char *name);
1861 extern void dev_mcast_init(void);
1862 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1864 extern int netdev_max_backlog;
1865 extern int weight_p;
1866 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1867 extern int skb_checksum_help(struct sk_buff *skb);
1868 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1870 extern void netdev_rx_csum_fault(struct net_device *dev);
1872 static inline void netdev_rx_csum_fault(struct net_device *dev)
1876 /* rx skb timestamps */
1877 extern void net_enable_timestamp(void);
1878 extern void net_disable_timestamp(void);
1880 #ifdef CONFIG_PROC_FS
1881 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1882 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1883 extern void dev_seq_stop(struct seq_file *seq, void *v);
1886 extern int netdev_class_create_file(struct class_attribute *class_attr);
1887 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1889 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1891 extern void linkwatch_run_queue(void);
1893 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1894 unsigned long mask);
1895 unsigned long netdev_fix_features(unsigned long features, const char *name);
1897 static inline int net_gso_ok(int features, int gso_type)
1899 int feature = gso_type << NETIF_F_GSO_SHIFT;
1900 return (features & feature) == feature;
1903 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1905 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1908 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1910 return skb_is_gso(skb) &&
1911 (!skb_gso_ok(skb, dev->features) ||
1912 (skb_shinfo(skb)->frag_list &&
1913 !(dev->features & NETIF_F_FRAGLIST)) ||
1914 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1917 static inline void netif_set_gso_max_size(struct net_device *dev,
1920 dev->gso_max_size = size;
1923 /* On bonding slaves other than the currently active slave, suppress
1924 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1925 * ARP on active-backup slaves with arp_validate enabled.
1927 static inline int skb_bond_should_drop(struct sk_buff *skb)
1929 struct net_device *dev = skb->dev;
1930 struct net_device *master = dev->master;
1933 if (master->priv_flags & IFF_MASTER_ARPMON)
1934 dev->last_rx = jiffies;
1936 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1937 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1938 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1941 if (master->priv_flags & IFF_MASTER_ALB) {
1942 if (skb->pkt_type != PACKET_BROADCAST &&
1943 skb->pkt_type != PACKET_MULTICAST)
1946 if (master->priv_flags & IFF_MASTER_8023AD &&
1947 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1956 extern struct pernet_operations __net_initdata loopback_net_ops;
1958 static inline int dev_ethtool_get_settings(struct net_device *dev,
1959 struct ethtool_cmd *cmd)
1961 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1963 return dev->ethtool_ops->get_settings(dev, cmd);
1966 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
1968 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
1970 return dev->ethtool_ops->get_rx_csum(dev);
1973 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
1975 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
1977 return dev->ethtool_ops->get_flags(dev);
1979 #endif /* __KERNEL__ */
1981 #endif /* _LINUX_DEV_H */