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/rculist.h>
43 #include <linux/dmaengine.h>
44 #include <linux/workqueue.h>
46 #include <linux/ethtool.h>
47 #include <net/net_namespace.h>
50 #include <net/dcbnl.h>
57 /* source back-compat hooks */
58 #define SET_ETHTOOL_OPS(netdev,ops) \
59 ( (netdev)->ethtool_ops = (ops) )
61 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
62 functions are available. */
63 #define HAVE_FREE_NETDEV /* free_netdev() */
64 #define HAVE_NETDEV_PRIV /* netdev_priv() */
66 #define NET_XMIT_SUCCESS 0
67 #define NET_XMIT_DROP 1 /* skb dropped */
68 #define NET_XMIT_CN 2 /* congestion notification */
69 #define NET_XMIT_POLICED 3 /* skb is shot by police */
70 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
72 /* Backlog congestion levels */
73 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
74 #define NET_RX_DROP 1 /* packet dropped */
75 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
76 #define NET_RX_CN_MOD 3 /* Storm on its way! */
77 #define NET_RX_CN_HIGH 4 /* The storm is here */
78 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
80 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
81 * indicates that the device will soon be dropping packets, or already drops
82 * some packets of the same priority; prompting us to send less aggressively. */
83 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
84 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
88 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
90 /* Driver transmit return codes */
91 #define NETDEV_TX_OK 0 /* driver took care of packet */
92 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
93 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
98 * Compute the worst case header length according to the protocols
102 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
103 # if defined(CONFIG_MAC80211_MESH)
104 # define LL_MAX_HEADER 128
106 # define LL_MAX_HEADER 96
108 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
109 # define LL_MAX_HEADER 48
111 # define LL_MAX_HEADER 32
114 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
115 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
116 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
117 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
118 #define MAX_HEADER LL_MAX_HEADER
120 #define MAX_HEADER (LL_MAX_HEADER + 48)
123 #endif /* __KERNEL__ */
126 * Network device statistics. Akin to the 2.0 ether stats but
127 * with byte counters.
130 struct net_device_stats
132 unsigned long rx_packets; /* total packets received */
133 unsigned long tx_packets; /* total packets transmitted */
134 unsigned long rx_bytes; /* total bytes received */
135 unsigned long tx_bytes; /* total bytes transmitted */
136 unsigned long rx_errors; /* bad packets received */
137 unsigned long tx_errors; /* packet transmit problems */
138 unsigned long rx_dropped; /* no space in linux buffers */
139 unsigned long tx_dropped; /* no space available in linux */
140 unsigned long multicast; /* multicast packets received */
141 unsigned long collisions;
143 /* detailed rx_errors: */
144 unsigned long rx_length_errors;
145 unsigned long rx_over_errors; /* receiver ring buff overflow */
146 unsigned long rx_crc_errors; /* recved pkt with crc error */
147 unsigned long rx_frame_errors; /* recv'd frame alignment error */
148 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
149 unsigned long rx_missed_errors; /* receiver missed packet */
151 /* detailed tx_errors */
152 unsigned long tx_aborted_errors;
153 unsigned long tx_carrier_errors;
154 unsigned long tx_fifo_errors;
155 unsigned long tx_heartbeat_errors;
156 unsigned long tx_window_errors;
159 unsigned long rx_compressed;
160 unsigned long tx_compressed;
164 /* Media selection options. */
177 #include <linux/cache.h>
178 #include <linux/skbuff.h>
184 struct netif_rx_stats
188 unsigned time_squeeze;
189 unsigned cpu_collision;
192 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
196 struct dev_addr_list *next;
197 u8 da_addr[MAX_ADDR_LEN];
205 * We tag multicasts with these structures.
208 #define dev_mc_list dev_addr_list
209 #define dmi_addr da_addr
210 #define dmi_addrlen da_addrlen
211 #define dmi_users da_users
212 #define dmi_gusers da_gusers
214 struct netdev_hw_addr {
215 struct list_head list;
216 unsigned char addr[MAX_ADDR_LEN];
218 #define NETDEV_HW_ADDR_T_LAN 1
219 #define NETDEV_HW_ADDR_T_SAN 2
220 #define NETDEV_HW_ADDR_T_SLAVE 3
221 struct rcu_head rcu_head;
226 struct hh_cache *hh_next; /* Next entry */
227 atomic_t hh_refcnt; /* number of users */
229 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
231 * They are mostly read, but hh_refcnt may be changed quite frequently,
232 * incurring cache line ping pongs.
234 __be16 hh_type ____cacheline_aligned_in_smp;
235 /* protocol identifier, f.e ETH_P_IP
236 * NOTE: For VLANs, this will be the
237 * encapuslated type. --BLG
239 u16 hh_len; /* length of header */
240 int (*hh_output)(struct sk_buff *skb);
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
263 #define LL_RESERVED_SPACE(dev) \
264 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
265 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
266 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 #define LL_ALLOCATED_SPACE(dev) \
268 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
271 int (*create) (struct sk_buff *skb, struct net_device *dev,
272 unsigned short type, const void *daddr,
273 const void *saddr, unsigned len);
274 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
275 int (*rebuild)(struct sk_buff *skb);
276 #define HAVE_HEADER_CACHE
277 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
278 void (*cache_update)(struct hh_cache *hh,
279 const struct net_device *dev,
280 const unsigned char *haddr);
283 /* These flag bits are private to the generic network queueing
284 * layer, they may not be explicitly referenced by any other
291 __LINK_STATE_PRESENT,
292 __LINK_STATE_NOCARRIER,
293 __LINK_STATE_LINKWATCH_PENDING,
294 __LINK_STATE_DORMANT,
299 * This structure holds at boot time configured netdevice settings. They
300 * are then used in the device probing.
302 struct netdev_boot_setup {
306 #define NETDEV_BOOT_SETUP_MAX 8
308 extern int __init netdev_boot_setup(char *str);
311 * Structure for NAPI scheduling similar to tasklet but with weighting
314 /* The poll_list must only be managed by the entity which
315 * changes the state of the NAPI_STATE_SCHED bit. This means
316 * whoever atomically sets that bit can add this napi_struct
317 * to the per-cpu poll_list, and whoever clears that bit
318 * can remove from the list right before clearing the bit.
320 struct list_head poll_list;
324 int (*poll)(struct napi_struct *, int);
325 #ifdef CONFIG_NETPOLL
326 spinlock_t poll_lock;
330 unsigned int gro_count;
332 struct net_device *dev;
333 struct list_head dev_list;
334 struct sk_buff *gro_list;
340 NAPI_STATE_SCHED, /* Poll is scheduled */
341 NAPI_STATE_DISABLE, /* Disable pending */
342 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
353 extern void __napi_schedule(struct napi_struct *n);
355 static inline int napi_disable_pending(struct napi_struct *n)
357 return test_bit(NAPI_STATE_DISABLE, &n->state);
361 * napi_schedule_prep - check if napi can be scheduled
364 * Test if NAPI routine is already running, and if not mark
365 * it as running. This is used as a condition variable
366 * insure only one NAPI poll instance runs. We also make
367 * sure there is no pending NAPI disable.
369 static inline int napi_schedule_prep(struct napi_struct *n)
371 return !napi_disable_pending(n) &&
372 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
376 * napi_schedule - schedule NAPI poll
379 * Schedule NAPI poll routine to be called if it is not already
382 static inline void napi_schedule(struct napi_struct *n)
384 if (napi_schedule_prep(n))
388 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
389 static inline int napi_reschedule(struct napi_struct *napi)
391 if (napi_schedule_prep(napi)) {
392 __napi_schedule(napi);
399 * napi_complete - NAPI processing complete
402 * Mark NAPI processing as complete.
404 extern void __napi_complete(struct napi_struct *n);
405 extern void napi_complete(struct napi_struct *n);
408 * napi_disable - prevent NAPI from scheduling
411 * Stop NAPI from being scheduled on this context.
412 * Waits till any outstanding processing completes.
414 static inline void napi_disable(struct napi_struct *n)
416 set_bit(NAPI_STATE_DISABLE, &n->state);
417 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
419 clear_bit(NAPI_STATE_DISABLE, &n->state);
423 * napi_enable - enable NAPI scheduling
426 * Resume NAPI from being scheduled on this context.
427 * Must be paired with napi_disable.
429 static inline void napi_enable(struct napi_struct *n)
431 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
432 smp_mb__before_clear_bit();
433 clear_bit(NAPI_STATE_SCHED, &n->state);
438 * napi_synchronize - wait until NAPI is not running
441 * Wait until NAPI is done being scheduled on this context.
442 * Waits till any outstanding processing completes but
443 * does not disable future activations.
445 static inline void napi_synchronize(const struct napi_struct *n)
447 while (test_bit(NAPI_STATE_SCHED, &n->state))
451 # define napi_synchronize(n) barrier()
454 enum netdev_queue_state_t
457 __QUEUE_STATE_FROZEN,
460 struct netdev_queue {
464 struct net_device *dev;
467 struct Qdisc *qdisc_sleeping;
471 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
474 * please use this field instead of dev->trans_start
476 unsigned long trans_start;
477 unsigned long tx_bytes;
478 unsigned long tx_packets;
479 unsigned long tx_dropped;
480 } ____cacheline_aligned_in_smp;
484 * This structure defines the management hooks for network devices.
485 * The following hooks can be defined; unless noted otherwise, they are
486 * optional and can be filled with a null pointer.
488 * int (*ndo_init)(struct net_device *dev);
489 * This function is called once when network device is registered.
490 * The network device can use this to any late stage initializaton
491 * or semantic validattion. It can fail with an error code which will
492 * be propogated back to register_netdev
494 * void (*ndo_uninit)(struct net_device *dev);
495 * This function is called when device is unregistered or when registration
496 * fails. It is not called if init fails.
498 * int (*ndo_open)(struct net_device *dev);
499 * This function is called when network device transistions to the up
502 * int (*ndo_stop)(struct net_device *dev);
503 * This function is called when network device transistions to the down
506 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
507 * Called when a packet needs to be transmitted.
508 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
509 * Required can not be NULL.
511 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
512 * Called to decide which queue to when device supports multiple
515 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
516 * This function is called to allow device receiver to make
517 * changes to configuration when multicast or promiscious is enabled.
519 * void (*ndo_set_rx_mode)(struct net_device *dev);
520 * This function is called device changes address list filtering.
522 * void (*ndo_set_multicast_list)(struct net_device *dev);
523 * This function is called when the multicast address list changes.
525 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
526 * This function is called when the Media Access Control address
527 * needs to be changed. If this interface is not defined, the
528 * mac address can not be changed.
530 * int (*ndo_validate_addr)(struct net_device *dev);
531 * Test if Media Access Control address is valid for the device.
533 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
534 * Called when a user request an ioctl which can't be handled by
535 * the generic interface code. If not defined ioctl's return
536 * not supported error code.
538 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
539 * Used to set network devices bus interface parameters. This interface
540 * is retained for legacy reason, new devices should use the bus
541 * interface (PCI) for low level management.
543 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
544 * Called when a user wants to change the Maximum Transfer Unit
545 * of a device. If not defined, any request to change MTU will
546 * will return an error.
548 * void (*ndo_tx_timeout)(struct net_device *dev);
549 * Callback uses when the transmitter has not made any progress
550 * for dev->watchdog ticks.
552 * struct net_device_stats* (*get_stats)(struct net_device *dev);
553 * Called when a user wants to get the network device usage
554 * statistics. If not defined, the counters in dev->stats will
557 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
558 * If device support VLAN receive accleration
559 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
560 * when vlan groups for the device changes. Note: grp is NULL
561 * if no vlan's groups are being used.
563 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
564 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
565 * this function is called when a VLAN id is registered.
567 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
568 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
569 * this function is called when a VLAN id is unregistered.
571 * void (*ndo_poll_controller)(struct net_device *dev);
573 #define HAVE_NET_DEVICE_OPS
574 struct net_device_ops {
575 int (*ndo_init)(struct net_device *dev);
576 void (*ndo_uninit)(struct net_device *dev);
577 int (*ndo_open)(struct net_device *dev);
578 int (*ndo_stop)(struct net_device *dev);
579 int (*ndo_start_xmit) (struct sk_buff *skb,
580 struct net_device *dev);
581 u16 (*ndo_select_queue)(struct net_device *dev,
582 struct sk_buff *skb);
583 #define HAVE_CHANGE_RX_FLAGS
584 void (*ndo_change_rx_flags)(struct net_device *dev,
586 #define HAVE_SET_RX_MODE
587 void (*ndo_set_rx_mode)(struct net_device *dev);
588 #define HAVE_MULTICAST
589 void (*ndo_set_multicast_list)(struct net_device *dev);
590 #define HAVE_SET_MAC_ADDR
591 int (*ndo_set_mac_address)(struct net_device *dev,
593 #define HAVE_VALIDATE_ADDR
594 int (*ndo_validate_addr)(struct net_device *dev);
595 #define HAVE_PRIVATE_IOCTL
596 int (*ndo_do_ioctl)(struct net_device *dev,
597 struct ifreq *ifr, int cmd);
598 #define HAVE_SET_CONFIG
599 int (*ndo_set_config)(struct net_device *dev,
601 #define HAVE_CHANGE_MTU
602 int (*ndo_change_mtu)(struct net_device *dev,
604 int (*ndo_neigh_setup)(struct net_device *dev,
605 struct neigh_parms *);
606 #define HAVE_TX_TIMEOUT
607 void (*ndo_tx_timeout) (struct net_device *dev);
609 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
611 void (*ndo_vlan_rx_register)(struct net_device *dev,
612 struct vlan_group *grp);
613 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
615 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
617 #ifdef CONFIG_NET_POLL_CONTROLLER
618 #define HAVE_NETDEV_POLL
619 void (*ndo_poll_controller)(struct net_device *dev);
621 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
622 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
624 struct scatterlist *sgl,
626 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
632 * The DEVICE structure.
633 * Actually, this whole structure is a big mistake. It mixes I/O
634 * data with strictly "high-level" data, and it has to know about
635 * almost every data structure used in the INET module.
637 * FIXME: cleanup struct net_device such that network protocol info
645 * This is the first field of the "visible" part of this structure
646 * (i.e. as seen by users in the "Space.c" file). It is the name
650 /* device name hash chain */
651 struct hlist_node name_hlist;
656 * I/O specific fields
657 * FIXME: Merge these and struct ifmap into one
659 unsigned long mem_end; /* shared mem end */
660 unsigned long mem_start; /* shared mem start */
661 unsigned long base_addr; /* device I/O address */
662 unsigned int irq; /* device IRQ number */
665 * Some hardware also needs these fields, but they are not
666 * part of the usual set specified in Space.c.
669 unsigned char if_port; /* Selectable AUI, TP,..*/
670 unsigned char dma; /* DMA channel */
674 struct list_head dev_list;
675 struct list_head napi_list;
677 /* Net device features */
678 unsigned long features;
679 #define NETIF_F_SG 1 /* Scatter/gather IO. */
680 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
681 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
682 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
683 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
684 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
685 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
686 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
687 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
688 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
689 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
690 #define NETIF_F_GSO 2048 /* Enable software GSO. */
691 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
692 /* do not use LLTX in new drivers */
693 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
694 #define NETIF_F_GRO 16384 /* Generic receive offload */
695 #define NETIF_F_LRO 32768 /* large receive offload */
697 /* the GSO_MASK reserves bits 16 through 23 */
698 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
699 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
701 /* Segmentation offload features */
702 #define NETIF_F_GSO_SHIFT 16
703 #define NETIF_F_GSO_MASK 0x00ff0000
704 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
705 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
706 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
707 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
708 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
709 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
711 /* List of features with software fallbacks. */
712 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
715 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
716 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
717 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
718 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
721 * If one device supports one of these features, then enable them
722 * for all in netdev_increment_features.
724 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
725 NETIF_F_SG | NETIF_F_HIGHDMA | \
728 /* Interface index. Unique device identifier */
732 struct net_device_stats stats;
734 #ifdef CONFIG_WIRELESS_EXT
735 /* List of functions to handle Wireless Extensions (instead of ioctl).
736 * See <net/iw_handler.h> for details. Jean II */
737 const struct iw_handler_def * wireless_handlers;
738 /* Instance data managed by the core of Wireless Extensions. */
739 struct iw_public_data * wireless_data;
741 /* Management operations */
742 const struct net_device_ops *netdev_ops;
743 const struct ethtool_ops *ethtool_ops;
745 /* Hardware header description */
746 const struct header_ops *header_ops;
748 unsigned int flags; /* interface flags (a la BSD) */
749 unsigned short gflags;
750 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
751 unsigned short padded; /* How much padding added by alloc_netdev() */
753 unsigned char operstate; /* RFC2863 operstate */
754 unsigned char link_mode; /* mapping policy to operstate */
756 unsigned mtu; /* interface MTU value */
757 unsigned short type; /* interface hardware type */
758 unsigned short hard_header_len; /* hardware hdr length */
760 /* extra head- and tailroom the hardware may need, but not in all cases
761 * can this be guaranteed, especially tailroom. Some cases also use
762 * LL_MAX_HEADER instead to allocate the skb.
764 unsigned short needed_headroom;
765 unsigned short needed_tailroom;
767 struct net_device *master; /* Pointer to master device of a group,
768 * which this device is member of.
771 /* Interface address info. */
772 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
773 unsigned char addr_len; /* hardware address length */
774 unsigned short dev_id; /* for shared network cards */
776 spinlock_t addr_list_lock;
777 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
778 int uc_count; /* Number of installed ucasts */
780 struct dev_addr_list *mc_list; /* Multicast mac addresses */
781 int mc_count; /* Number of installed mcasts */
782 unsigned int promiscuity;
783 unsigned int allmulti;
786 /* Protocol specific pointers */
788 #ifdef CONFIG_NET_DSA
789 void *dsa_ptr; /* dsa specific data */
791 void *atalk_ptr; /* AppleTalk link */
792 void *ip_ptr; /* IPv4 specific data */
793 void *dn_ptr; /* DECnet specific data */
794 void *ip6_ptr; /* IPv6 specific data */
795 void *ec_ptr; /* Econet specific data */
796 void *ax25_ptr; /* AX.25 specific data */
797 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
798 assign before registering */
801 * Cache line mostly used on receive path (including eth_type_trans())
803 unsigned long last_rx; /* Time of last Rx */
804 /* Interface address info used in eth_type_trans() */
805 unsigned char *dev_addr; /* hw address, (before bcast
806 because most packets are
809 struct list_head dev_addr_list; /* list of device hw addresses */
811 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
813 struct netdev_queue rx_queue;
815 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
817 /* Number of TX queues allocated at alloc_netdev_mq() time */
818 unsigned int num_tx_queues;
820 /* Number of TX queues currently active in device */
821 unsigned int real_num_tx_queues;
823 unsigned long tx_queue_len; /* Max frames per queue allowed */
824 spinlock_t tx_global_lock;
826 * One part is mostly used on xmit path (device)
828 /* These may be needed for future network-power-down code. */
831 * trans_start here is expensive for high speed devices on SMP,
832 * please use netdev_queue->trans_start instead.
834 unsigned long trans_start; /* Time (in jiffies) of last Tx */
836 int watchdog_timeo; /* used by dev_watchdog() */
837 struct timer_list watchdog_timer;
839 /* Number of references to this device */
840 atomic_t refcnt ____cacheline_aligned_in_smp;
842 /* delayed register/unregister */
843 struct list_head todo_list;
844 /* device index hash chain */
845 struct hlist_node index_hlist;
847 struct net_device *link_watch_next;
849 /* register/unregister state machine */
850 enum { NETREG_UNINITIALIZED=0,
851 NETREG_REGISTERED, /* completed register_netdevice */
852 NETREG_UNREGISTERING, /* called unregister_netdevice */
853 NETREG_UNREGISTERED, /* completed unregister todo */
854 NETREG_RELEASED, /* called free_netdev */
855 NETREG_DUMMY, /* dummy device for NAPI poll */
858 /* Called from unregister, can be used to call free_netdev */
859 void (*destructor)(struct net_device *dev);
861 #ifdef CONFIG_NETPOLL
862 struct netpoll_info *npinfo;
866 /* Network namespace this network device is inside */
870 /* mid-layer private */
874 struct net_bridge_port *br_port;
876 struct macvlan_port *macvlan_port;
878 struct garp_port *garp_port;
880 /* class/net/name entry */
882 /* space for optional statistics and wireless sysfs groups */
883 struct attribute_group *sysfs_groups[3];
885 /* rtnetlink link ops */
886 const struct rtnl_link_ops *rtnl_link_ops;
888 /* VLAN feature mask */
889 unsigned long vlan_features;
891 /* for setting kernel sock attribute on TCP connection setup */
892 #define GSO_MAX_SIZE 65536
893 unsigned int gso_max_size;
896 /* Data Center Bridging netlink ops */
897 struct dcbnl_rtnl_ops *dcbnl_ops;
900 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
901 /* max exchange id for FCoE LRO by ddp */
902 unsigned int fcoe_ddp_xid;
905 #ifdef CONFIG_COMPAT_NET_DEV_OPS
907 int (*init)(struct net_device *dev);
908 void (*uninit)(struct net_device *dev);
909 int (*open)(struct net_device *dev);
910 int (*stop)(struct net_device *dev);
911 int (*hard_start_xmit) (struct sk_buff *skb,
912 struct net_device *dev);
913 u16 (*select_queue)(struct net_device *dev,
914 struct sk_buff *skb);
915 void (*change_rx_flags)(struct net_device *dev,
917 void (*set_rx_mode)(struct net_device *dev);
918 void (*set_multicast_list)(struct net_device *dev);
919 int (*set_mac_address)(struct net_device *dev,
921 int (*validate_addr)(struct net_device *dev);
922 int (*do_ioctl)(struct net_device *dev,
923 struct ifreq *ifr, int cmd);
924 int (*set_config)(struct net_device *dev,
926 int (*change_mtu)(struct net_device *dev, int new_mtu);
927 int (*neigh_setup)(struct net_device *dev,
928 struct neigh_parms *);
929 void (*tx_timeout) (struct net_device *dev);
930 struct net_device_stats* (*get_stats)(struct net_device *dev);
931 void (*vlan_rx_register)(struct net_device *dev,
932 struct vlan_group *grp);
933 void (*vlan_rx_add_vid)(struct net_device *dev,
935 void (*vlan_rx_kill_vid)(struct net_device *dev,
937 #ifdef CONFIG_NET_POLL_CONTROLLER
938 void (*poll_controller)(struct net_device *dev);
943 #define to_net_dev(d) container_of(d, struct net_device, dev)
945 #define NETDEV_ALIGN 32
946 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
949 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
952 return &dev->_tx[index];
955 static inline void netdev_for_each_tx_queue(struct net_device *dev,
956 void (*f)(struct net_device *,
957 struct netdev_queue *,
963 for (i = 0; i < dev->num_tx_queues; i++)
964 f(dev, &dev->_tx[i], arg);
968 * Net namespace inlines
971 struct net *dev_net(const struct net_device *dev)
981 void dev_net_set(struct net_device *dev, struct net *net)
984 release_net(dev->nd_net);
985 dev->nd_net = hold_net(net);
989 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
991 #ifdef CONFIG_NET_DSA_TAG_DSA
992 if (dev->dsa_ptr != NULL)
993 return dsa_uses_dsa_tags(dev->dsa_ptr);
999 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1001 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1002 if (dev->dsa_ptr != NULL)
1003 return dsa_uses_trailer_tags(dev->dsa_ptr);
1010 * netdev_priv - access network device private data
1011 * @dev: network device
1013 * Get network device private data
1015 static inline void *netdev_priv(const struct net_device *dev)
1017 return (char *)dev + ((sizeof(struct net_device)
1018 + NETDEV_ALIGN_CONST)
1019 & ~NETDEV_ALIGN_CONST);
1022 /* Set the sysfs physical device reference for the network logical device
1023 * if set prior to registration will cause a symlink during initialization.
1025 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1028 * netif_napi_add - initialize a napi context
1029 * @dev: network device
1030 * @napi: napi context
1031 * @poll: polling function
1032 * @weight: default weight
1034 * netif_napi_add() must be used to initialize a napi context prior to calling
1035 * *any* of the other napi related functions.
1037 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1038 int (*poll)(struct napi_struct *, int), int weight);
1041 * netif_napi_del - remove a napi context
1042 * @napi: napi context
1044 * netif_napi_del() removes a napi context from the network device napi list
1046 void netif_napi_del(struct napi_struct *napi);
1048 struct napi_gro_cb {
1049 /* This indicates where we are processing relative to skb->data. */
1052 /* This is non-zero if the packet may be of the same flow. */
1055 /* This is non-zero if the packet cannot be merged with the new skb. */
1058 /* Number of segments aggregated. */
1065 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1067 struct packet_type {
1068 __be16 type; /* This is really htons(ether_type). */
1069 struct net_device *dev; /* NULL is wildcarded here */
1070 int (*func) (struct sk_buff *,
1071 struct net_device *,
1072 struct packet_type *,
1073 struct net_device *);
1074 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1076 int (*gso_send_check)(struct sk_buff *skb);
1077 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1078 struct sk_buff *skb);
1079 int (*gro_complete)(struct sk_buff *skb);
1080 void *af_packet_priv;
1081 struct list_head list;
1084 #include <linux/interrupt.h>
1085 #include <linux/notifier.h>
1087 extern rwlock_t dev_base_lock; /* Device list lock */
1090 #define for_each_netdev(net, d) \
1091 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1092 #define for_each_netdev_safe(net, d, n) \
1093 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1094 #define for_each_netdev_continue(net, d) \
1095 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1096 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1098 static inline struct net_device *next_net_device(struct net_device *dev)
1100 struct list_head *lh;
1104 lh = dev->dev_list.next;
1105 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1108 static inline struct net_device *first_net_device(struct net *net)
1110 return list_empty(&net->dev_base_head) ? NULL :
1111 net_device_entry(net->dev_base_head.next);
1114 extern int netdev_boot_setup_check(struct net_device *dev);
1115 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1116 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1117 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1118 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1119 extern void dev_add_pack(struct packet_type *pt);
1120 extern void dev_remove_pack(struct packet_type *pt);
1121 extern void __dev_remove_pack(struct packet_type *pt);
1123 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1124 unsigned short mask);
1125 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1126 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1127 extern int dev_alloc_name(struct net_device *dev, const char *name);
1128 extern int dev_open(struct net_device *dev);
1129 extern int dev_close(struct net_device *dev);
1130 extern void dev_disable_lro(struct net_device *dev);
1131 extern int dev_queue_xmit(struct sk_buff *skb);
1132 extern int register_netdevice(struct net_device *dev);
1133 extern void unregister_netdevice(struct net_device *dev);
1134 extern void free_netdev(struct net_device *dev);
1135 extern void synchronize_net(void);
1136 extern int register_netdevice_notifier(struct notifier_block *nb);
1137 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1138 extern int init_dummy_netdev(struct net_device *dev);
1139 extern void netdev_resync_ops(struct net_device *dev);
1141 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1142 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1143 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1144 extern int dev_restart(struct net_device *dev);
1145 #ifdef CONFIG_NETPOLL_TRAP
1146 extern int netpoll_trap(void);
1148 extern void *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
1149 extern int skb_gro_receive(struct sk_buff **head,
1150 struct sk_buff *skb);
1152 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1154 return NAPI_GRO_CB(skb)->data_offset;
1157 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1159 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1162 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1164 NAPI_GRO_CB(skb)->data_offset += len;
1167 static inline void skb_gro_reset_offset(struct sk_buff *skb)
1169 NAPI_GRO_CB(skb)->data_offset = 0;
1172 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1174 return skb_headlen(skb) ? skb_mac_header(skb) :
1175 page_address(skb_shinfo(skb)->frags[0].page) +
1176 skb_shinfo(skb)->frags[0].page_offset;
1179 static inline void *skb_gro_network_header(struct sk_buff *skb)
1181 return skb_headlen(skb) ? skb_network_header(skb) :
1182 page_address(skb_shinfo(skb)->frags[0].page) +
1183 skb_shinfo(skb)->frags[0].page_offset + skb_network_offset(skb);
1186 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1187 unsigned short type,
1188 const void *daddr, const void *saddr,
1191 if (!dev->header_ops || !dev->header_ops->create)
1194 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1197 static inline int dev_parse_header(const struct sk_buff *skb,
1198 unsigned char *haddr)
1200 const struct net_device *dev = skb->dev;
1202 if (!dev->header_ops || !dev->header_ops->parse)
1204 return dev->header_ops->parse(skb, haddr);
1207 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1208 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1209 static inline int unregister_gifconf(unsigned int family)
1211 return register_gifconf(family, NULL);
1215 * Incoming packets are placed on per-cpu queues so that
1216 * no locking is needed.
1220 struct Qdisc *output_queue;
1221 struct sk_buff_head input_pkt_queue;
1222 struct list_head poll_list;
1223 struct sk_buff *completion_queue;
1225 struct napi_struct backlog;
1228 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1230 #define HAVE_NETIF_QUEUE
1232 extern void __netif_schedule(struct Qdisc *q);
1234 static inline void netif_schedule_queue(struct netdev_queue *txq)
1236 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1237 __netif_schedule(txq->qdisc);
1240 static inline void netif_tx_schedule_all(struct net_device *dev)
1244 for (i = 0; i < dev->num_tx_queues; i++)
1245 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1248 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1250 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1254 * netif_start_queue - allow transmit
1255 * @dev: network device
1257 * Allow upper layers to call the device hard_start_xmit routine.
1259 static inline void netif_start_queue(struct net_device *dev)
1261 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1264 static inline void netif_tx_start_all_queues(struct net_device *dev)
1268 for (i = 0; i < dev->num_tx_queues; i++) {
1269 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1270 netif_tx_start_queue(txq);
1274 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1276 #ifdef CONFIG_NETPOLL_TRAP
1277 if (netpoll_trap()) {
1278 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1282 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1283 __netif_schedule(dev_queue->qdisc);
1287 * netif_wake_queue - restart transmit
1288 * @dev: network device
1290 * Allow upper layers to call the device hard_start_xmit routine.
1291 * Used for flow control when transmit resources are available.
1293 static inline void netif_wake_queue(struct net_device *dev)
1295 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1298 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1302 for (i = 0; i < dev->num_tx_queues; i++) {
1303 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1304 netif_tx_wake_queue(txq);
1308 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1310 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1314 * netif_stop_queue - stop transmitted packets
1315 * @dev: network device
1317 * Stop upper layers calling the device hard_start_xmit routine.
1318 * Used for flow control when transmit resources are unavailable.
1320 static inline void netif_stop_queue(struct net_device *dev)
1322 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1325 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1329 for (i = 0; i < dev->num_tx_queues; i++) {
1330 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1331 netif_tx_stop_queue(txq);
1335 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1337 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1341 * netif_queue_stopped - test if transmit queue is flowblocked
1342 * @dev: network device
1344 * Test if transmit queue on device is currently unable to send.
1346 static inline int netif_queue_stopped(const struct net_device *dev)
1348 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1351 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1353 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1357 * netif_running - test if up
1358 * @dev: network device
1360 * Test if the device has been brought up.
1362 static inline int netif_running(const struct net_device *dev)
1364 return test_bit(__LINK_STATE_START, &dev->state);
1368 * Routines to manage the subqueues on a device. We only need start
1369 * stop, and a check if it's stopped. All other device management is
1370 * done at the overall netdevice level.
1371 * Also test the device if we're multiqueue.
1375 * netif_start_subqueue - allow sending packets on subqueue
1376 * @dev: network device
1377 * @queue_index: sub queue index
1379 * Start individual transmit queue of a device with multiple transmit queues.
1381 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1383 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1384 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1388 * netif_stop_subqueue - stop sending packets on subqueue
1389 * @dev: network device
1390 * @queue_index: sub queue index
1392 * Stop individual transmit queue of a device with multiple transmit queues.
1394 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1396 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1397 #ifdef CONFIG_NETPOLL_TRAP
1401 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1405 * netif_subqueue_stopped - test status of subqueue
1406 * @dev: network device
1407 * @queue_index: sub queue index
1409 * Check individual transmit queue of a device with multiple transmit queues.
1411 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1414 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1415 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1418 static inline int netif_subqueue_stopped(const struct net_device *dev,
1419 struct sk_buff *skb)
1421 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1425 * netif_wake_subqueue - allow sending packets on subqueue
1426 * @dev: network device
1427 * @queue_index: sub queue index
1429 * Resume individual transmit queue of a device with multiple transmit queues.
1431 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1433 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1434 #ifdef CONFIG_NETPOLL_TRAP
1438 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1439 __netif_schedule(txq->qdisc);
1443 * netif_is_multiqueue - test if device has multiple transmit queues
1444 * @dev: network device
1446 * Check if device has multiple transmit queues
1448 static inline int netif_is_multiqueue(const struct net_device *dev)
1450 return (dev->num_tx_queues > 1);
1453 /* Use this variant when it is known for sure that it
1454 * is executing from hardware interrupt context or with hardware interrupts
1457 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1459 /* Use this variant in places where it could be invoked
1460 * from either hardware interrupt or other context, with hardware interrupts
1461 * either disabled or enabled.
1463 extern void dev_kfree_skb_any(struct sk_buff *skb);
1465 #define HAVE_NETIF_RX 1
1466 extern int netif_rx(struct sk_buff *skb);
1467 extern int netif_rx_ni(struct sk_buff *skb);
1468 #define HAVE_NETIF_RECEIVE_SKB 1
1469 extern int netif_receive_skb(struct sk_buff *skb);
1470 extern void napi_gro_flush(struct napi_struct *napi);
1471 extern int dev_gro_receive(struct napi_struct *napi,
1472 struct sk_buff *skb);
1473 extern int napi_skb_finish(int ret, struct sk_buff *skb);
1474 extern int napi_gro_receive(struct napi_struct *napi,
1475 struct sk_buff *skb);
1476 extern void napi_reuse_skb(struct napi_struct *napi,
1477 struct sk_buff *skb);
1478 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1479 extern int napi_frags_finish(struct napi_struct *napi,
1480 struct sk_buff *skb, int ret);
1481 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1482 extern int napi_gro_frags(struct napi_struct *napi);
1484 static inline void napi_free_frags(struct napi_struct *napi)
1486 kfree_skb(napi->skb);
1490 extern void netif_nit_deliver(struct sk_buff *skb);
1491 extern int dev_valid_name(const char *name);
1492 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1493 extern int dev_ethtool(struct net *net, struct ifreq *);
1494 extern unsigned dev_get_flags(const struct net_device *);
1495 extern int dev_change_flags(struct net_device *, unsigned);
1496 extern int dev_change_name(struct net_device *, const char *);
1497 extern int dev_set_alias(struct net_device *, const char *, size_t);
1498 extern int dev_change_net_namespace(struct net_device *,
1499 struct net *, const char *);
1500 extern int dev_set_mtu(struct net_device *, int);
1501 extern int dev_set_mac_address(struct net_device *,
1503 extern int dev_hard_start_xmit(struct sk_buff *skb,
1504 struct net_device *dev,
1505 struct netdev_queue *txq);
1507 extern int netdev_budget;
1509 /* Called by rtnetlink.c:rtnl_unlock() */
1510 extern void netdev_run_todo(void);
1513 * dev_put - release reference to device
1514 * @dev: network device
1516 * Release reference to device to allow it to be freed.
1518 static inline void dev_put(struct net_device *dev)
1520 atomic_dec(&dev->refcnt);
1524 * dev_hold - get reference to device
1525 * @dev: network device
1527 * Hold reference to device to keep it from being freed.
1529 static inline void dev_hold(struct net_device *dev)
1531 atomic_inc(&dev->refcnt);
1534 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1535 * and _off may be called from IRQ context, but it is caller
1536 * who is responsible for serialization of these calls.
1538 * The name carrier is inappropriate, these functions should really be
1539 * called netif_lowerlayer_*() because they represent the state of any
1540 * kind of lower layer not just hardware media.
1543 extern void linkwatch_fire_event(struct net_device *dev);
1546 * netif_carrier_ok - test if carrier present
1547 * @dev: network device
1549 * Check if carrier is present on device
1551 static inline int netif_carrier_ok(const struct net_device *dev)
1553 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1556 extern unsigned long dev_trans_start(struct net_device *dev);
1558 extern void __netdev_watchdog_up(struct net_device *dev);
1560 extern void netif_carrier_on(struct net_device *dev);
1562 extern void netif_carrier_off(struct net_device *dev);
1565 * netif_dormant_on - mark device as dormant.
1566 * @dev: network device
1568 * Mark device as dormant (as per RFC2863).
1570 * The dormant state indicates that the relevant interface is not
1571 * actually in a condition to pass packets (i.e., it is not 'up') but is
1572 * in a "pending" state, waiting for some external event. For "on-
1573 * demand" interfaces, this new state identifies the situation where the
1574 * interface is waiting for events to place it in the up state.
1577 static inline void netif_dormant_on(struct net_device *dev)
1579 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1580 linkwatch_fire_event(dev);
1584 * netif_dormant_off - set device as not dormant.
1585 * @dev: network device
1587 * Device is not in dormant state.
1589 static inline void netif_dormant_off(struct net_device *dev)
1591 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1592 linkwatch_fire_event(dev);
1596 * netif_dormant - test if carrier present
1597 * @dev: network device
1599 * Check if carrier is present on device
1601 static inline int netif_dormant(const struct net_device *dev)
1603 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1608 * netif_oper_up - test if device is operational
1609 * @dev: network device
1611 * Check if carrier is operational
1613 static inline int netif_oper_up(const struct net_device *dev) {
1614 return (dev->operstate == IF_OPER_UP ||
1615 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1619 * netif_device_present - is device available or removed
1620 * @dev: network device
1622 * Check if device has not been removed from system.
1624 static inline int netif_device_present(struct net_device *dev)
1626 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1629 extern void netif_device_detach(struct net_device *dev);
1631 extern void netif_device_attach(struct net_device *dev);
1634 * Network interface message level settings
1636 #define HAVE_NETIF_MSG 1
1639 NETIF_MSG_DRV = 0x0001,
1640 NETIF_MSG_PROBE = 0x0002,
1641 NETIF_MSG_LINK = 0x0004,
1642 NETIF_MSG_TIMER = 0x0008,
1643 NETIF_MSG_IFDOWN = 0x0010,
1644 NETIF_MSG_IFUP = 0x0020,
1645 NETIF_MSG_RX_ERR = 0x0040,
1646 NETIF_MSG_TX_ERR = 0x0080,
1647 NETIF_MSG_TX_QUEUED = 0x0100,
1648 NETIF_MSG_INTR = 0x0200,
1649 NETIF_MSG_TX_DONE = 0x0400,
1650 NETIF_MSG_RX_STATUS = 0x0800,
1651 NETIF_MSG_PKTDATA = 0x1000,
1652 NETIF_MSG_HW = 0x2000,
1653 NETIF_MSG_WOL = 0x4000,
1656 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1657 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1658 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1659 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1660 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1661 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1662 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1663 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1664 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1665 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1666 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1667 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1668 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1669 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1670 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1672 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1675 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1676 return default_msg_enable_bits;
1677 if (debug_value == 0) /* no output */
1679 /* set low N bits */
1680 return (1 << debug_value) - 1;
1683 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1685 spin_lock(&txq->_xmit_lock);
1686 txq->xmit_lock_owner = cpu;
1689 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1691 spin_lock_bh(&txq->_xmit_lock);
1692 txq->xmit_lock_owner = smp_processor_id();
1695 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1697 int ok = spin_trylock(&txq->_xmit_lock);
1699 txq->xmit_lock_owner = smp_processor_id();
1703 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1705 txq->xmit_lock_owner = -1;
1706 spin_unlock(&txq->_xmit_lock);
1709 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1711 txq->xmit_lock_owner = -1;
1712 spin_unlock_bh(&txq->_xmit_lock);
1716 * netif_tx_lock - grab network device transmit lock
1717 * @dev: network device
1719 * Get network device transmit lock
1721 static inline void netif_tx_lock(struct net_device *dev)
1726 spin_lock(&dev->tx_global_lock);
1727 cpu = smp_processor_id();
1728 for (i = 0; i < dev->num_tx_queues; i++) {
1729 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1731 /* We are the only thread of execution doing a
1732 * freeze, but we have to grab the _xmit_lock in
1733 * order to synchronize with threads which are in
1734 * the ->hard_start_xmit() handler and already
1735 * checked the frozen bit.
1737 __netif_tx_lock(txq, cpu);
1738 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1739 __netif_tx_unlock(txq);
1743 static inline void netif_tx_lock_bh(struct net_device *dev)
1749 static inline void netif_tx_unlock(struct net_device *dev)
1753 for (i = 0; i < dev->num_tx_queues; i++) {
1754 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1756 /* No need to grab the _xmit_lock here. If the
1757 * queue is not stopped for another reason, we
1760 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1761 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1762 __netif_schedule(txq->qdisc);
1764 spin_unlock(&dev->tx_global_lock);
1767 static inline void netif_tx_unlock_bh(struct net_device *dev)
1769 netif_tx_unlock(dev);
1773 #define HARD_TX_LOCK(dev, txq, cpu) { \
1774 if ((dev->features & NETIF_F_LLTX) == 0) { \
1775 __netif_tx_lock(txq, cpu); \
1779 #define HARD_TX_UNLOCK(dev, txq) { \
1780 if ((dev->features & NETIF_F_LLTX) == 0) { \
1781 __netif_tx_unlock(txq); \
1785 static inline void netif_tx_disable(struct net_device *dev)
1791 cpu = smp_processor_id();
1792 for (i = 0; i < dev->num_tx_queues; i++) {
1793 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1795 __netif_tx_lock(txq, cpu);
1796 netif_tx_stop_queue(txq);
1797 __netif_tx_unlock(txq);
1802 static inline void netif_addr_lock(struct net_device *dev)
1804 spin_lock(&dev->addr_list_lock);
1807 static inline void netif_addr_lock_bh(struct net_device *dev)
1809 spin_lock_bh(&dev->addr_list_lock);
1812 static inline void netif_addr_unlock(struct net_device *dev)
1814 spin_unlock(&dev->addr_list_lock);
1817 static inline void netif_addr_unlock_bh(struct net_device *dev)
1819 spin_unlock_bh(&dev->addr_list_lock);
1823 * dev_addr_list walker. Should be used only for read access. Call with
1824 * rcu_read_lock held.
1826 #define for_each_dev_addr(dev, ha) \
1827 list_for_each_entry_rcu(ha, &dev->dev_addr_list, list)
1829 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1831 extern void ether_setup(struct net_device *dev);
1833 /* Support for loadable net-drivers */
1834 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1835 void (*setup)(struct net_device *),
1836 unsigned int queue_count);
1837 #define alloc_netdev(sizeof_priv, name, setup) \
1838 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1839 extern int register_netdev(struct net_device *dev);
1840 extern void unregister_netdev(struct net_device *dev);
1842 /* Functions used for device addresses handling */
1843 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1844 unsigned char addr_type);
1845 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1846 unsigned char addr_type);
1847 extern int dev_addr_add_multiple(struct net_device *to_dev,
1848 struct net_device *from_dev,
1849 unsigned char addr_type);
1850 extern int dev_addr_del_multiple(struct net_device *to_dev,
1851 struct net_device *from_dev,
1852 unsigned char addr_type);
1854 /* Functions used for secondary unicast and multicast support */
1855 extern void dev_set_rx_mode(struct net_device *dev);
1856 extern void __dev_set_rx_mode(struct net_device *dev);
1857 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1858 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1859 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1860 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1861 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1862 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1863 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1864 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1865 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1866 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1867 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1868 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1869 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1870 extern int dev_set_allmulti(struct net_device *dev, int inc);
1871 extern void netdev_state_change(struct net_device *dev);
1872 extern void netdev_bonding_change(struct net_device *dev);
1873 extern void netdev_features_change(struct net_device *dev);
1874 /* Load a device via the kmod */
1875 extern void dev_load(struct net *net, const char *name);
1876 extern void dev_mcast_init(void);
1877 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1879 extern int netdev_max_backlog;
1880 extern int weight_p;
1881 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1882 extern int skb_checksum_help(struct sk_buff *skb);
1883 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1885 extern void netdev_rx_csum_fault(struct net_device *dev);
1887 static inline void netdev_rx_csum_fault(struct net_device *dev)
1891 /* rx skb timestamps */
1892 extern void net_enable_timestamp(void);
1893 extern void net_disable_timestamp(void);
1895 #ifdef CONFIG_PROC_FS
1896 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1897 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1898 extern void dev_seq_stop(struct seq_file *seq, void *v);
1901 extern int netdev_class_create_file(struct class_attribute *class_attr);
1902 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1904 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1906 extern void linkwatch_run_queue(void);
1908 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1909 unsigned long mask);
1910 unsigned long netdev_fix_features(unsigned long features, const char *name);
1912 static inline int net_gso_ok(int features, int gso_type)
1914 int feature = gso_type << NETIF_F_GSO_SHIFT;
1915 return (features & feature) == feature;
1918 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1920 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1923 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1925 return skb_is_gso(skb) &&
1926 (!skb_gso_ok(skb, dev->features) ||
1927 (skb_shinfo(skb)->frag_list &&
1928 !(dev->features & NETIF_F_FRAGLIST)) ||
1929 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1932 static inline void netif_set_gso_max_size(struct net_device *dev,
1935 dev->gso_max_size = size;
1938 /* On bonding slaves other than the currently active slave, suppress
1939 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1940 * ARP on active-backup slaves with arp_validate enabled.
1942 static inline int skb_bond_should_drop(struct sk_buff *skb)
1944 struct net_device *dev = skb->dev;
1945 struct net_device *master = dev->master;
1948 if (master->priv_flags & IFF_MASTER_ARPMON)
1949 dev->last_rx = jiffies;
1951 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1952 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1953 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1956 if (master->priv_flags & IFF_MASTER_ALB) {
1957 if (skb->pkt_type != PACKET_BROADCAST &&
1958 skb->pkt_type != PACKET_MULTICAST)
1961 if (master->priv_flags & IFF_MASTER_8023AD &&
1962 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1971 extern struct pernet_operations __net_initdata loopback_net_ops;
1973 static inline int dev_ethtool_get_settings(struct net_device *dev,
1974 struct ethtool_cmd *cmd)
1976 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1978 return dev->ethtool_ops->get_settings(dev, cmd);
1981 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
1983 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
1985 return dev->ethtool_ops->get_rx_csum(dev);
1988 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
1990 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
1992 return dev->ethtool_ops->get_flags(dev);
1994 #endif /* __KERNEL__ */
1996 #endif /* _LINUX_DEV_H */