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>
35 #include <asm/atomic.h>
36 #include <asm/cache.h>
37 #include <asm/byteorder.h>
39 #include <linux/device.h>
40 #include <linux/percpu.h>
41 #include <linux/dmaengine.h>
42 #include <linux/workqueue.h>
44 #include <net/net_namespace.h>
47 #include <net/dcbnl.h>
55 /* source back-compat hooks */
56 #define SET_ETHTOOL_OPS(netdev,ops) \
57 ( (netdev)->ethtool_ops = (ops) )
59 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
60 functions are available. */
61 #define HAVE_FREE_NETDEV /* free_netdev() */
62 #define HAVE_NETDEV_PRIV /* netdev_priv() */
64 #define NET_XMIT_SUCCESS 0
65 #define NET_XMIT_DROP 1 /* skb dropped */
66 #define NET_XMIT_CN 2 /* congestion notification */
67 #define NET_XMIT_POLICED 3 /* skb is shot by police */
68 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
70 /* Backlog congestion levels */
71 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
72 #define NET_RX_DROP 1 /* packet dropped */
73 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
74 #define NET_RX_CN_MOD 3 /* Storm on its way! */
75 #define NET_RX_CN_HIGH 4 /* The storm is here */
76 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
78 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
79 * indicates that the device will soon be dropping packets, or already drops
80 * some packets of the same priority; prompting us to send less aggressively. */
81 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
82 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
86 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
88 /* Driver transmit return codes */
89 #define NETDEV_TX_OK 0 /* driver took care of packet */
90 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
91 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
96 * Compute the worst case header length according to the protocols
100 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
101 # if defined(CONFIG_MAC80211_MESH)
102 # define LL_MAX_HEADER 128
104 # define LL_MAX_HEADER 96
106 #elif defined(CONFIG_TR)
107 # define LL_MAX_HEADER 48
109 # define LL_MAX_HEADER 32
112 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
113 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
114 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
115 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
116 #define MAX_HEADER LL_MAX_HEADER
118 #define MAX_HEADER (LL_MAX_HEADER + 48)
121 #endif /* __KERNEL__ */
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
128 struct net_device_stats
130 unsigned long rx_packets; /* total packets received */
131 unsigned long tx_packets; /* total packets transmitted */
132 unsigned long rx_bytes; /* total bytes received */
133 unsigned long tx_bytes; /* total bytes transmitted */
134 unsigned long rx_errors; /* bad packets received */
135 unsigned long tx_errors; /* packet transmit problems */
136 unsigned long rx_dropped; /* no space in linux buffers */
137 unsigned long tx_dropped; /* no space available in linux */
138 unsigned long multicast; /* multicast packets received */
139 unsigned long collisions;
141 /* detailed rx_errors: */
142 unsigned long rx_length_errors;
143 unsigned long rx_over_errors; /* receiver ring buff overflow */
144 unsigned long rx_crc_errors; /* recved pkt with crc error */
145 unsigned long rx_frame_errors; /* recv'd frame alignment error */
146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
147 unsigned long rx_missed_errors; /* receiver missed packet */
149 /* detailed tx_errors */
150 unsigned long tx_aborted_errors;
151 unsigned long tx_carrier_errors;
152 unsigned long tx_fifo_errors;
153 unsigned long tx_heartbeat_errors;
154 unsigned long tx_window_errors;
157 unsigned long rx_compressed;
158 unsigned long tx_compressed;
162 /* Media selection options. */
175 #include <linux/cache.h>
176 #include <linux/skbuff.h>
182 struct netif_rx_stats
186 unsigned time_squeeze;
187 unsigned cpu_collision;
190 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
194 struct dev_addr_list *next;
195 u8 da_addr[MAX_ADDR_LEN];
203 * We tag multicasts with these structures.
206 #define dev_mc_list dev_addr_list
207 #define dmi_addr da_addr
208 #define dmi_addrlen da_addrlen
209 #define dmi_users da_users
210 #define dmi_gusers da_gusers
214 struct hh_cache *hh_next; /* Next entry */
215 atomic_t hh_refcnt; /* number of users */
217 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
219 * They are mostly read, but hh_refcnt may be changed quite frequently,
220 * incurring cache line ping pongs.
222 __be16 hh_type ____cacheline_aligned_in_smp;
223 /* protocol identifier, f.e ETH_P_IP
224 * NOTE: For VLANs, this will be the
225 * encapuslated type. --BLG
227 u16 hh_len; /* length of header */
228 int (*hh_output)(struct sk_buff *skb);
231 /* cached hardware header; allow for machine alignment needs. */
232 #define HH_DATA_MOD 16
233 #define HH_DATA_OFF(__len) \
234 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
235 #define HH_DATA_ALIGN(__len) \
236 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
237 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
240 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
242 * dev->hard_header_len ? (dev->hard_header_len +
243 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
245 * We could use other alignment values, but we must maintain the
246 * relationship HH alignment <= LL alignment.
248 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
251 #define LL_RESERVED_SPACE(dev) \
252 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
253 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
254 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
255 #define LL_ALLOCATED_SPACE(dev) \
256 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 int (*create) (struct sk_buff *skb, struct net_device *dev,
260 unsigned short type, const void *daddr,
261 const void *saddr, unsigned len);
262 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
263 int (*rebuild)(struct sk_buff *skb);
264 #define HAVE_HEADER_CACHE
265 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
266 void (*cache_update)(struct hh_cache *hh,
267 const struct net_device *dev,
268 const unsigned char *haddr);
271 /* These flag bits are private to the generic network queueing
272 * layer, they may not be explicitly referenced by any other
279 __LINK_STATE_PRESENT,
280 __LINK_STATE_NOCARRIER,
281 __LINK_STATE_LINKWATCH_PENDING,
282 __LINK_STATE_DORMANT,
287 * This structure holds at boot time configured netdevice settings. They
288 * are then used in the device probing.
290 struct netdev_boot_setup {
294 #define NETDEV_BOOT_SETUP_MAX 8
296 extern int __init netdev_boot_setup(char *str);
299 * Structure for NAPI scheduling similar to tasklet but with weighting
302 /* The poll_list must only be managed by the entity which
303 * changes the state of the NAPI_STATE_SCHED bit. This means
304 * whoever atomically sets that bit can add this napi_struct
305 * to the per-cpu poll_list, and whoever clears that bit
306 * can remove from the list right before clearing the bit.
308 struct list_head poll_list;
312 int (*poll)(struct napi_struct *, int);
313 #ifdef CONFIG_NETPOLL
314 spinlock_t poll_lock;
318 unsigned int gro_count;
320 struct net_device *dev;
321 struct list_head dev_list;
322 struct sk_buff *gro_list;
328 NAPI_STATE_SCHED, /* Poll is scheduled */
329 NAPI_STATE_DISABLE, /* Disable pending */
330 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
341 extern void __napi_schedule(struct napi_struct *n);
343 static inline int napi_disable_pending(struct napi_struct *n)
345 return test_bit(NAPI_STATE_DISABLE, &n->state);
349 * napi_schedule_prep - check if napi can be scheduled
352 * Test if NAPI routine is already running, and if not mark
353 * it as running. This is used as a condition variable
354 * insure only one NAPI poll instance runs. We also make
355 * sure there is no pending NAPI disable.
357 static inline int napi_schedule_prep(struct napi_struct *n)
359 return !napi_disable_pending(n) &&
360 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
364 * napi_schedule - schedule NAPI poll
367 * Schedule NAPI poll routine to be called if it is not already
370 static inline void napi_schedule(struct napi_struct *n)
372 if (napi_schedule_prep(n))
376 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
377 static inline int napi_reschedule(struct napi_struct *napi)
379 if (napi_schedule_prep(napi)) {
380 __napi_schedule(napi);
387 * napi_complete - NAPI processing complete
390 * Mark NAPI processing as complete.
392 extern void __napi_complete(struct napi_struct *n);
393 extern void napi_complete(struct napi_struct *n);
396 * napi_disable - prevent NAPI from scheduling
399 * Stop NAPI from being scheduled on this context.
400 * Waits till any outstanding processing completes.
402 static inline void napi_disable(struct napi_struct *n)
404 set_bit(NAPI_STATE_DISABLE, &n->state);
405 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
407 clear_bit(NAPI_STATE_DISABLE, &n->state);
411 * napi_enable - enable NAPI scheduling
414 * Resume NAPI from being scheduled on this context.
415 * Must be paired with napi_disable.
417 static inline void napi_enable(struct napi_struct *n)
419 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
420 smp_mb__before_clear_bit();
421 clear_bit(NAPI_STATE_SCHED, &n->state);
426 * napi_synchronize - wait until NAPI is not running
429 * Wait until NAPI is done being scheduled on this context.
430 * Waits till any outstanding processing completes but
431 * does not disable future activations.
433 static inline void napi_synchronize(const struct napi_struct *n)
435 while (test_bit(NAPI_STATE_SCHED, &n->state))
439 # define napi_synchronize(n) barrier()
442 enum netdev_queue_state_t
445 __QUEUE_STATE_FROZEN,
448 struct netdev_queue {
449 struct net_device *dev;
452 spinlock_t _xmit_lock;
454 struct Qdisc *qdisc_sleeping;
455 } ____cacheline_aligned_in_smp;
459 * This structure defines the management hooks for network devices.
460 * The following hooks can be defined; unless noted otherwise, they are
461 * optional and can be filled with a null pointer.
463 * int (*ndo_init)(struct net_device *dev);
464 * This function is called once when network device is registered.
465 * The network device can use this to any late stage initializaton
466 * or semantic validattion. It can fail with an error code which will
467 * be propogated back to register_netdev
469 * void (*ndo_uninit)(struct net_device *dev);
470 * This function is called when device is unregistered or when registration
471 * fails. It is not called if init fails.
473 * int (*ndo_open)(struct net_device *dev);
474 * This function is called when network device transistions to the up
477 * int (*ndo_stop)(struct net_device *dev);
478 * This function is called when network device transistions to the down
481 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
482 * Called when a packet needs to be transmitted.
483 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
484 * Required can not be NULL.
486 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
487 * Called to decide which queue to when device supports multiple
490 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
491 * This function is called to allow device receiver to make
492 * changes to configuration when multicast or promiscious is enabled.
494 * void (*ndo_set_rx_mode)(struct net_device *dev);
495 * This function is called device changes address list filtering.
497 * void (*ndo_set_multicast_list)(struct net_device *dev);
498 * This function is called when the multicast address list changes.
500 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
501 * This function is called when the Media Access Control address
502 * needs to be changed. If not this interface is not defined, the
503 * mac address can not be changed.
505 * int (*ndo_validate_addr)(struct net_device *dev);
506 * Test if Media Access Control address is valid for the device.
508 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
509 * Called when a user request an ioctl which can't be handled by
510 * the generic interface code. If not defined ioctl's return
511 * not supported error code.
513 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
514 * Used to set network devices bus interface parameters. This interface
515 * is retained for legacy reason, new devices should use the bus
516 * interface (PCI) for low level management.
518 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
519 * Called when a user wants to change the Maximum Transfer Unit
520 * of a device. If not defined, any request to change MTU will
521 * will return an error.
523 * void (*ndo_tx_timeout)(struct net_device *dev);
524 * Callback uses when the transmitter has not made any progress
525 * for dev->watchdog ticks.
527 * struct net_device_stats* (*get_stats)(struct net_device *dev);
528 * Called when a user wants to get the network device usage
529 * statistics. If not defined, the counters in dev->stats will
532 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
533 * If device support VLAN receive accleration
534 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
535 * when vlan groups for the device changes. Note: grp is NULL
536 * if no vlan's groups are being used.
538 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
539 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
540 * this function is called when a VLAN id is registered.
542 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
543 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
544 * this function is called when a VLAN id is unregistered.
546 * void (*ndo_poll_controller)(struct net_device *dev);
548 #define HAVE_NET_DEVICE_OPS
549 struct net_device_ops {
550 int (*ndo_init)(struct net_device *dev);
551 void (*ndo_uninit)(struct net_device *dev);
552 int (*ndo_open)(struct net_device *dev);
553 int (*ndo_stop)(struct net_device *dev);
554 int (*ndo_start_xmit) (struct sk_buff *skb,
555 struct net_device *dev);
556 u16 (*ndo_select_queue)(struct net_device *dev,
557 struct sk_buff *skb);
558 #define HAVE_CHANGE_RX_FLAGS
559 void (*ndo_change_rx_flags)(struct net_device *dev,
561 #define HAVE_SET_RX_MODE
562 void (*ndo_set_rx_mode)(struct net_device *dev);
563 #define HAVE_MULTICAST
564 void (*ndo_set_multicast_list)(struct net_device *dev);
565 #define HAVE_SET_MAC_ADDR
566 int (*ndo_set_mac_address)(struct net_device *dev,
568 #define HAVE_VALIDATE_ADDR
569 int (*ndo_validate_addr)(struct net_device *dev);
570 #define HAVE_PRIVATE_IOCTL
571 int (*ndo_do_ioctl)(struct net_device *dev,
572 struct ifreq *ifr, int cmd);
573 #define HAVE_SET_CONFIG
574 int (*ndo_set_config)(struct net_device *dev,
576 #define HAVE_CHANGE_MTU
577 int (*ndo_change_mtu)(struct net_device *dev,
579 int (*ndo_neigh_setup)(struct net_device *dev,
580 struct neigh_parms *);
581 #define HAVE_TX_TIMEOUT
582 void (*ndo_tx_timeout) (struct net_device *dev);
584 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
586 void (*ndo_vlan_rx_register)(struct net_device *dev,
587 struct vlan_group *grp);
588 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
590 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
592 #ifdef CONFIG_NET_POLL_CONTROLLER
593 #define HAVE_NETDEV_POLL
594 void (*ndo_poll_controller)(struct net_device *dev);
599 * The DEVICE structure.
600 * Actually, this whole structure is a big mistake. It mixes I/O
601 * data with strictly "high-level" data, and it has to know about
602 * almost every data structure used in the INET module.
604 * FIXME: cleanup struct net_device such that network protocol info
612 * This is the first field of the "visible" part of this structure
613 * (i.e. as seen by users in the "Space.c" file). It is the name
617 /* device name hash chain */
618 struct hlist_node name_hlist;
623 * I/O specific fields
624 * FIXME: Merge these and struct ifmap into one
626 unsigned long mem_end; /* shared mem end */
627 unsigned long mem_start; /* shared mem start */
628 unsigned long base_addr; /* device I/O address */
629 unsigned int irq; /* device IRQ number */
632 * Some hardware also needs these fields, but they are not
633 * part of the usual set specified in Space.c.
636 unsigned char if_port; /* Selectable AUI, TP,..*/
637 unsigned char dma; /* DMA channel */
641 struct list_head dev_list;
642 struct list_head napi_list;
644 /* Net device features */
645 unsigned long features;
646 #define NETIF_F_SG 1 /* Scatter/gather IO. */
647 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
648 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
649 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
650 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
651 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
652 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
653 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
654 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
655 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
656 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
657 #define NETIF_F_GSO 2048 /* Enable software GSO. */
658 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
659 /* do not use LLTX in new drivers */
660 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
661 #define NETIF_F_GRO 16384 /* Generic receive offload */
662 #define NETIF_F_LRO 32768 /* large receive offload */
664 /* Segmentation offload features */
665 #define NETIF_F_GSO_SHIFT 16
666 #define NETIF_F_GSO_MASK 0xffff0000
667 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
668 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
669 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
670 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
671 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
673 /* List of features with software fallbacks. */
674 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
677 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
678 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
679 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
680 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
683 * If one device supports one of these features, then enable them
684 * for all in netdev_increment_features.
686 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
687 NETIF_F_SG | NETIF_F_HIGHDMA | \
690 /* Interface index. Unique device identifier */
694 struct net_device_stats stats;
696 #ifdef CONFIG_WIRELESS_EXT
697 /* List of functions to handle Wireless Extensions (instead of ioctl).
698 * See <net/iw_handler.h> for details. Jean II */
699 const struct iw_handler_def * wireless_handlers;
700 /* Instance data managed by the core of Wireless Extensions. */
701 struct iw_public_data * wireless_data;
703 /* Management operations */
704 const struct net_device_ops *netdev_ops;
705 const struct ethtool_ops *ethtool_ops;
707 /* Hardware header description */
708 const struct header_ops *header_ops;
710 unsigned int flags; /* interface flags (a la BSD) */
711 unsigned short gflags;
712 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
713 unsigned short padded; /* How much padding added by alloc_netdev() */
715 unsigned char operstate; /* RFC2863 operstate */
716 unsigned char link_mode; /* mapping policy to operstate */
718 unsigned mtu; /* interface MTU value */
719 unsigned short type; /* interface hardware type */
720 unsigned short hard_header_len; /* hardware hdr length */
722 /* extra head- and tailroom the hardware may need, but not in all cases
723 * can this be guaranteed, especially tailroom. Some cases also use
724 * LL_MAX_HEADER instead to allocate the skb.
726 unsigned short needed_headroom;
727 unsigned short needed_tailroom;
729 struct net_device *master; /* Pointer to master device of a group,
730 * which this device is member of.
733 /* Interface address info. */
734 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
735 unsigned char addr_len; /* hardware address length */
736 unsigned short dev_id; /* for shared network cards */
738 spinlock_t addr_list_lock;
739 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
740 int uc_count; /* Number of installed ucasts */
742 struct dev_addr_list *mc_list; /* Multicast mac addresses */
743 int mc_count; /* Number of installed mcasts */
744 unsigned int promiscuity;
745 unsigned int allmulti;
748 /* Protocol specific pointers */
750 #ifdef CONFIG_NET_DSA
751 void *dsa_ptr; /* dsa specific data */
753 void *atalk_ptr; /* AppleTalk link */
754 void *ip_ptr; /* IPv4 specific data */
755 void *dn_ptr; /* DECnet specific data */
756 void *ip6_ptr; /* IPv6 specific data */
757 void *ec_ptr; /* Econet specific data */
758 void *ax25_ptr; /* AX.25 specific data */
759 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
760 assign before registering */
763 * Cache line mostly used on receive path (including eth_type_trans())
765 unsigned long last_rx; /* Time of last Rx */
766 /* Interface address info used in eth_type_trans() */
767 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
768 because most packets are unicast) */
770 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
772 struct netdev_queue rx_queue;
774 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
776 /* Number of TX queues allocated at alloc_netdev_mq() time */
777 unsigned int num_tx_queues;
779 /* Number of TX queues currently active in device */
780 unsigned int real_num_tx_queues;
782 unsigned long tx_queue_len; /* Max frames per queue allowed */
783 spinlock_t tx_global_lock;
785 * One part is mostly used on xmit path (device)
787 /* These may be needed for future network-power-down code. */
788 unsigned long trans_start; /* Time (in jiffies) of last Tx */
790 int watchdog_timeo; /* used by dev_watchdog() */
791 struct timer_list watchdog_timer;
793 /* Number of references to this device */
794 atomic_t refcnt ____cacheline_aligned_in_smp;
796 /* delayed register/unregister */
797 struct list_head todo_list;
798 /* device index hash chain */
799 struct hlist_node index_hlist;
801 struct net_device *link_watch_next;
803 /* register/unregister state machine */
804 enum { NETREG_UNINITIALIZED=0,
805 NETREG_REGISTERED, /* completed register_netdevice */
806 NETREG_UNREGISTERING, /* called unregister_netdevice */
807 NETREG_UNREGISTERED, /* completed unregister todo */
808 NETREG_RELEASED, /* called free_netdev */
809 NETREG_DUMMY, /* dummy device for NAPI poll */
812 /* Called from unregister, can be used to call free_netdev */
813 void (*destructor)(struct net_device *dev);
815 #ifdef CONFIG_NETPOLL
816 struct netpoll_info *npinfo;
820 /* Network namespace this network device is inside */
824 /* mid-layer private */
828 struct net_bridge_port *br_port;
830 struct macvlan_port *macvlan_port;
832 struct garp_port *garp_port;
834 /* class/net/name entry */
836 /* space for optional statistics and wireless sysfs groups */
837 struct attribute_group *sysfs_groups[3];
839 /* rtnetlink link ops */
840 const struct rtnl_link_ops *rtnl_link_ops;
842 /* VLAN feature mask */
843 unsigned long vlan_features;
845 /* for setting kernel sock attribute on TCP connection setup */
846 #define GSO_MAX_SIZE 65536
847 unsigned int gso_max_size;
850 /* Data Center Bridging netlink ops */
851 struct dcbnl_rtnl_ops *dcbnl_ops;
854 #ifdef CONFIG_COMPAT_NET_DEV_OPS
856 int (*init)(struct net_device *dev);
857 void (*uninit)(struct net_device *dev);
858 int (*open)(struct net_device *dev);
859 int (*stop)(struct net_device *dev);
860 int (*hard_start_xmit) (struct sk_buff *skb,
861 struct net_device *dev);
862 u16 (*select_queue)(struct net_device *dev,
863 struct sk_buff *skb);
864 void (*change_rx_flags)(struct net_device *dev,
866 void (*set_rx_mode)(struct net_device *dev);
867 void (*set_multicast_list)(struct net_device *dev);
868 int (*set_mac_address)(struct net_device *dev,
870 int (*validate_addr)(struct net_device *dev);
871 int (*do_ioctl)(struct net_device *dev,
872 struct ifreq *ifr, int cmd);
873 int (*set_config)(struct net_device *dev,
875 int (*change_mtu)(struct net_device *dev, int new_mtu);
876 int (*neigh_setup)(struct net_device *dev,
877 struct neigh_parms *);
878 void (*tx_timeout) (struct net_device *dev);
879 struct net_device_stats* (*get_stats)(struct net_device *dev);
880 void (*vlan_rx_register)(struct net_device *dev,
881 struct vlan_group *grp);
882 void (*vlan_rx_add_vid)(struct net_device *dev,
884 void (*vlan_rx_kill_vid)(struct net_device *dev,
886 #ifdef CONFIG_NET_POLL_CONTROLLER
887 void (*poll_controller)(struct net_device *dev);
892 #define to_net_dev(d) container_of(d, struct net_device, dev)
894 #define NETDEV_ALIGN 32
895 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
898 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
901 return &dev->_tx[index];
904 static inline void netdev_for_each_tx_queue(struct net_device *dev,
905 void (*f)(struct net_device *,
906 struct netdev_queue *,
912 for (i = 0; i < dev->num_tx_queues; i++)
913 f(dev, &dev->_tx[i], arg);
917 * Net namespace inlines
920 struct net *dev_net(const struct net_device *dev)
930 void dev_net_set(struct net_device *dev, struct net *net)
933 release_net(dev->nd_net);
934 dev->nd_net = hold_net(net);
938 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
940 #ifdef CONFIG_NET_DSA_TAG_DSA
941 if (dev->dsa_ptr != NULL)
942 return dsa_uses_dsa_tags(dev->dsa_ptr);
948 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
950 #ifdef CONFIG_NET_DSA_TAG_TRAILER
951 if (dev->dsa_ptr != NULL)
952 return dsa_uses_trailer_tags(dev->dsa_ptr);
959 * netdev_priv - access network device private data
960 * @dev: network device
962 * Get network device private data
964 static inline void *netdev_priv(const struct net_device *dev)
966 return (char *)dev + ((sizeof(struct net_device)
967 + NETDEV_ALIGN_CONST)
968 & ~NETDEV_ALIGN_CONST);
971 /* Set the sysfs physical device reference for the network logical device
972 * if set prior to registration will cause a symlink during initialization.
974 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
977 * netif_napi_add - initialize a napi context
978 * @dev: network device
979 * @napi: napi context
980 * @poll: polling function
981 * @weight: default weight
983 * netif_napi_add() must be used to initialize a napi context prior to calling
984 * *any* of the other napi related functions.
986 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
987 int (*poll)(struct napi_struct *, int), int weight);
990 * netif_napi_del - remove a napi context
991 * @napi: napi context
993 * netif_napi_del() removes a napi context from the network device napi list
995 void netif_napi_del(struct napi_struct *napi);
998 /* This indicates where we are processing relative to skb->data. */
1001 /* This is non-zero if the packet may be of the same flow. */
1004 /* This is non-zero if the packet cannot be merged with the new skb. */
1007 /* Number of segments aggregated. */
1014 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1016 struct packet_type {
1017 __be16 type; /* This is really htons(ether_type). */
1018 struct net_device *dev; /* NULL is wildcarded here */
1019 int (*func) (struct sk_buff *,
1020 struct net_device *,
1021 struct packet_type *,
1022 struct net_device *);
1023 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1025 int (*gso_send_check)(struct sk_buff *skb);
1026 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1027 struct sk_buff *skb);
1028 int (*gro_complete)(struct sk_buff *skb);
1029 void *af_packet_priv;
1030 struct list_head list;
1033 struct napi_gro_fraginfo {
1034 skb_frag_t frags[MAX_SKB_FRAGS];
1035 unsigned int nr_frags;
1036 unsigned int ip_summed;
1041 #include <linux/interrupt.h>
1042 #include <linux/notifier.h>
1044 extern rwlock_t dev_base_lock; /* Device list lock */
1047 #define for_each_netdev(net, d) \
1048 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1049 #define for_each_netdev_safe(net, d, n) \
1050 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1051 #define for_each_netdev_continue(net, d) \
1052 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1053 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1055 static inline struct net_device *next_net_device(struct net_device *dev)
1057 struct list_head *lh;
1061 lh = dev->dev_list.next;
1062 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1065 static inline struct net_device *first_net_device(struct net *net)
1067 return list_empty(&net->dev_base_head) ? NULL :
1068 net_device_entry(net->dev_base_head.next);
1071 extern int netdev_boot_setup_check(struct net_device *dev);
1072 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1073 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1074 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1075 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1076 extern void dev_add_pack(struct packet_type *pt);
1077 extern void dev_remove_pack(struct packet_type *pt);
1078 extern void __dev_remove_pack(struct packet_type *pt);
1080 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1081 unsigned short mask);
1082 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1083 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1084 extern int dev_alloc_name(struct net_device *dev, const char *name);
1085 extern int dev_open(struct net_device *dev);
1086 extern int dev_close(struct net_device *dev);
1087 extern void dev_disable_lro(struct net_device *dev);
1088 extern int dev_queue_xmit(struct sk_buff *skb);
1089 extern int register_netdevice(struct net_device *dev);
1090 extern void unregister_netdevice(struct net_device *dev);
1091 extern void free_netdev(struct net_device *dev);
1092 extern void synchronize_net(void);
1093 extern int register_netdevice_notifier(struct notifier_block *nb);
1094 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1095 extern int init_dummy_netdev(struct net_device *dev);
1096 extern void netdev_resync_ops(struct net_device *dev);
1098 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1099 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1100 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1101 extern int dev_restart(struct net_device *dev);
1102 #ifdef CONFIG_NETPOLL_TRAP
1103 extern int netpoll_trap(void);
1105 extern void *skb_gro_header(struct sk_buff *skb, unsigned int hlen);
1106 extern int skb_gro_receive(struct sk_buff **head,
1107 struct sk_buff *skb);
1109 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1111 return NAPI_GRO_CB(skb)->data_offset;
1114 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1116 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1119 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1121 NAPI_GRO_CB(skb)->data_offset += len;
1124 static inline void skb_gro_reset_offset(struct sk_buff *skb)
1126 NAPI_GRO_CB(skb)->data_offset = 0;
1129 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1131 return skb_mac_header(skb) < skb->data ? skb_mac_header(skb) :
1132 page_address(skb_shinfo(skb)->frags[0].page) +
1133 skb_shinfo(skb)->frags[0].page_offset;
1136 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1137 unsigned short type,
1138 const void *daddr, const void *saddr,
1141 if (!dev->header_ops || !dev->header_ops->create)
1144 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1147 static inline int dev_parse_header(const struct sk_buff *skb,
1148 unsigned char *haddr)
1150 const struct net_device *dev = skb->dev;
1152 if (!dev->header_ops || !dev->header_ops->parse)
1154 return dev->header_ops->parse(skb, haddr);
1157 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1158 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1159 static inline int unregister_gifconf(unsigned int family)
1161 return register_gifconf(family, NULL);
1165 * Incoming packets are placed on per-cpu queues so that
1166 * no locking is needed.
1170 struct Qdisc *output_queue;
1171 struct sk_buff_head input_pkt_queue;
1172 struct list_head poll_list;
1173 struct sk_buff *completion_queue;
1175 struct napi_struct backlog;
1178 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1180 #define HAVE_NETIF_QUEUE
1182 extern void __netif_schedule(struct Qdisc *q);
1184 static inline void netif_schedule_queue(struct netdev_queue *txq)
1186 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1187 __netif_schedule(txq->qdisc);
1190 static inline void netif_tx_schedule_all(struct net_device *dev)
1194 for (i = 0; i < dev->num_tx_queues; i++)
1195 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1198 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1200 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1204 * netif_start_queue - allow transmit
1205 * @dev: network device
1207 * Allow upper layers to call the device hard_start_xmit routine.
1209 static inline void netif_start_queue(struct net_device *dev)
1211 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1214 static inline void netif_tx_start_all_queues(struct net_device *dev)
1218 for (i = 0; i < dev->num_tx_queues; i++) {
1219 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1220 netif_tx_start_queue(txq);
1224 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1226 #ifdef CONFIG_NETPOLL_TRAP
1227 if (netpoll_trap()) {
1228 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1232 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1233 __netif_schedule(dev_queue->qdisc);
1237 * netif_wake_queue - restart transmit
1238 * @dev: network device
1240 * Allow upper layers to call the device hard_start_xmit routine.
1241 * Used for flow control when transmit resources are available.
1243 static inline void netif_wake_queue(struct net_device *dev)
1245 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1248 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1252 for (i = 0; i < dev->num_tx_queues; i++) {
1253 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1254 netif_tx_wake_queue(txq);
1258 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1260 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1264 * netif_stop_queue - stop transmitted packets
1265 * @dev: network device
1267 * Stop upper layers calling the device hard_start_xmit routine.
1268 * Used for flow control when transmit resources are unavailable.
1270 static inline void netif_stop_queue(struct net_device *dev)
1272 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1275 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1279 for (i = 0; i < dev->num_tx_queues; i++) {
1280 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1281 netif_tx_stop_queue(txq);
1285 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1287 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1291 * netif_queue_stopped - test if transmit queue is flowblocked
1292 * @dev: network device
1294 * Test if transmit queue on device is currently unable to send.
1296 static inline int netif_queue_stopped(const struct net_device *dev)
1298 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1301 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1303 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1307 * netif_running - test if up
1308 * @dev: network device
1310 * Test if the device has been brought up.
1312 static inline int netif_running(const struct net_device *dev)
1314 return test_bit(__LINK_STATE_START, &dev->state);
1318 * Routines to manage the subqueues on a device. We only need start
1319 * stop, and a check if it's stopped. All other device management is
1320 * done at the overall netdevice level.
1321 * Also test the device if we're multiqueue.
1325 * netif_start_subqueue - allow sending packets on subqueue
1326 * @dev: network device
1327 * @queue_index: sub queue index
1329 * Start individual transmit queue of a device with multiple transmit queues.
1331 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1333 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1334 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1338 * netif_stop_subqueue - stop sending packets on subqueue
1339 * @dev: network device
1340 * @queue_index: sub queue index
1342 * Stop individual transmit queue of a device with multiple transmit queues.
1344 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1346 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1347 #ifdef CONFIG_NETPOLL_TRAP
1351 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1355 * netif_subqueue_stopped - test status of subqueue
1356 * @dev: network device
1357 * @queue_index: sub queue index
1359 * Check individual transmit queue of a device with multiple transmit queues.
1361 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1364 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1365 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1368 static inline int netif_subqueue_stopped(const struct net_device *dev,
1369 struct sk_buff *skb)
1371 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1375 * netif_wake_subqueue - allow sending packets on subqueue
1376 * @dev: network device
1377 * @queue_index: sub queue index
1379 * Resume individual transmit queue of a device with multiple transmit queues.
1381 static inline void netif_wake_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 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1389 __netif_schedule(txq->qdisc);
1393 * netif_is_multiqueue - test if device has multiple transmit queues
1394 * @dev: network device
1396 * Check if device has multiple transmit queues
1398 static inline int netif_is_multiqueue(const struct net_device *dev)
1400 return (dev->num_tx_queues > 1);
1403 /* Use this variant when it is known for sure that it
1404 * is executing from hardware interrupt context or with hardware interrupts
1407 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1409 /* Use this variant in places where it could be invoked
1410 * from either hardware interrupt or other context, with hardware interrupts
1411 * either disabled or enabled.
1413 extern void dev_kfree_skb_any(struct sk_buff *skb);
1415 #define HAVE_NETIF_RX 1
1416 extern int netif_rx(struct sk_buff *skb);
1417 extern int netif_rx_ni(struct sk_buff *skb);
1418 #define HAVE_NETIF_RECEIVE_SKB 1
1419 extern int netif_receive_skb(struct sk_buff *skb);
1420 extern void napi_gro_flush(struct napi_struct *napi);
1421 extern int dev_gro_receive(struct napi_struct *napi,
1422 struct sk_buff *skb);
1423 extern int napi_skb_finish(int ret, struct sk_buff *skb);
1424 extern int napi_gro_receive(struct napi_struct *napi,
1425 struct sk_buff *skb);
1426 extern void napi_reuse_skb(struct napi_struct *napi,
1427 struct sk_buff *skb);
1428 extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi,
1429 struct napi_gro_fraginfo *info);
1430 extern int napi_frags_finish(struct napi_struct *napi,
1431 struct sk_buff *skb, int ret);
1432 extern int napi_gro_frags(struct napi_struct *napi,
1433 struct napi_gro_fraginfo *info);
1434 extern void netif_nit_deliver(struct sk_buff *skb);
1435 extern int dev_valid_name(const char *name);
1436 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1437 extern int dev_ethtool(struct net *net, struct ifreq *);
1438 extern unsigned dev_get_flags(const struct net_device *);
1439 extern int dev_change_flags(struct net_device *, unsigned);
1440 extern int dev_change_name(struct net_device *, const char *);
1441 extern int dev_set_alias(struct net_device *, const char *, size_t);
1442 extern int dev_change_net_namespace(struct net_device *,
1443 struct net *, const char *);
1444 extern int dev_set_mtu(struct net_device *, int);
1445 extern int dev_set_mac_address(struct net_device *,
1447 extern int dev_hard_start_xmit(struct sk_buff *skb,
1448 struct net_device *dev,
1449 struct netdev_queue *txq);
1451 extern int netdev_budget;
1453 /* Called by rtnetlink.c:rtnl_unlock() */
1454 extern void netdev_run_todo(void);
1457 * dev_put - release reference to device
1458 * @dev: network device
1460 * Release reference to device to allow it to be freed.
1462 static inline void dev_put(struct net_device *dev)
1464 atomic_dec(&dev->refcnt);
1468 * dev_hold - get reference to device
1469 * @dev: network device
1471 * Hold reference to device to keep it from being freed.
1473 static inline void dev_hold(struct net_device *dev)
1475 atomic_inc(&dev->refcnt);
1478 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1479 * and _off may be called from IRQ context, but it is caller
1480 * who is responsible for serialization of these calls.
1482 * The name carrier is inappropriate, these functions should really be
1483 * called netif_lowerlayer_*() because they represent the state of any
1484 * kind of lower layer not just hardware media.
1487 extern void linkwatch_fire_event(struct net_device *dev);
1490 * netif_carrier_ok - test if carrier present
1491 * @dev: network device
1493 * Check if carrier is present on device
1495 static inline int netif_carrier_ok(const struct net_device *dev)
1497 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1500 extern void __netdev_watchdog_up(struct net_device *dev);
1502 extern void netif_carrier_on(struct net_device *dev);
1504 extern void netif_carrier_off(struct net_device *dev);
1507 * netif_dormant_on - mark device as dormant.
1508 * @dev: network device
1510 * Mark device as dormant (as per RFC2863).
1512 * The dormant state indicates that the relevant interface is not
1513 * actually in a condition to pass packets (i.e., it is not 'up') but is
1514 * in a "pending" state, waiting for some external event. For "on-
1515 * demand" interfaces, this new state identifies the situation where the
1516 * interface is waiting for events to place it in the up state.
1519 static inline void netif_dormant_on(struct net_device *dev)
1521 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1522 linkwatch_fire_event(dev);
1526 * netif_dormant_off - set device as not dormant.
1527 * @dev: network device
1529 * Device is not in dormant state.
1531 static inline void netif_dormant_off(struct net_device *dev)
1533 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1534 linkwatch_fire_event(dev);
1538 * netif_dormant - test if carrier present
1539 * @dev: network device
1541 * Check if carrier is present on device
1543 static inline int netif_dormant(const struct net_device *dev)
1545 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1550 * netif_oper_up - test if device is operational
1551 * @dev: network device
1553 * Check if carrier is operational
1555 static inline int netif_oper_up(const struct net_device *dev) {
1556 return (dev->operstate == IF_OPER_UP ||
1557 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1561 * netif_device_present - is device available or removed
1562 * @dev: network device
1564 * Check if device has not been removed from system.
1566 static inline int netif_device_present(struct net_device *dev)
1568 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1571 extern void netif_device_detach(struct net_device *dev);
1573 extern void netif_device_attach(struct net_device *dev);
1576 * Network interface message level settings
1578 #define HAVE_NETIF_MSG 1
1581 NETIF_MSG_DRV = 0x0001,
1582 NETIF_MSG_PROBE = 0x0002,
1583 NETIF_MSG_LINK = 0x0004,
1584 NETIF_MSG_TIMER = 0x0008,
1585 NETIF_MSG_IFDOWN = 0x0010,
1586 NETIF_MSG_IFUP = 0x0020,
1587 NETIF_MSG_RX_ERR = 0x0040,
1588 NETIF_MSG_TX_ERR = 0x0080,
1589 NETIF_MSG_TX_QUEUED = 0x0100,
1590 NETIF_MSG_INTR = 0x0200,
1591 NETIF_MSG_TX_DONE = 0x0400,
1592 NETIF_MSG_RX_STATUS = 0x0800,
1593 NETIF_MSG_PKTDATA = 0x1000,
1594 NETIF_MSG_HW = 0x2000,
1595 NETIF_MSG_WOL = 0x4000,
1598 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1599 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1600 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1601 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1602 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1603 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1604 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1605 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1606 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1607 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1608 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1609 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1610 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1611 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1612 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1614 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1617 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1618 return default_msg_enable_bits;
1619 if (debug_value == 0) /* no output */
1621 /* set low N bits */
1622 return (1 << debug_value) - 1;
1625 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1627 spin_lock(&txq->_xmit_lock);
1628 txq->xmit_lock_owner = cpu;
1631 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1633 spin_lock_bh(&txq->_xmit_lock);
1634 txq->xmit_lock_owner = smp_processor_id();
1637 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1639 int ok = spin_trylock(&txq->_xmit_lock);
1641 txq->xmit_lock_owner = smp_processor_id();
1645 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1647 txq->xmit_lock_owner = -1;
1648 spin_unlock(&txq->_xmit_lock);
1651 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1653 txq->xmit_lock_owner = -1;
1654 spin_unlock_bh(&txq->_xmit_lock);
1658 * netif_tx_lock - grab network device transmit lock
1659 * @dev: network device
1661 * Get network device transmit lock
1663 static inline void netif_tx_lock(struct net_device *dev)
1668 spin_lock(&dev->tx_global_lock);
1669 cpu = smp_processor_id();
1670 for (i = 0; i < dev->num_tx_queues; i++) {
1671 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1673 /* We are the only thread of execution doing a
1674 * freeze, but we have to grab the _xmit_lock in
1675 * order to synchronize with threads which are in
1676 * the ->hard_start_xmit() handler and already
1677 * checked the frozen bit.
1679 __netif_tx_lock(txq, cpu);
1680 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1681 __netif_tx_unlock(txq);
1685 static inline void netif_tx_lock_bh(struct net_device *dev)
1691 static inline void netif_tx_unlock(struct net_device *dev)
1695 for (i = 0; i < dev->num_tx_queues; i++) {
1696 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1698 /* No need to grab the _xmit_lock here. If the
1699 * queue is not stopped for another reason, we
1702 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1703 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1704 __netif_schedule(txq->qdisc);
1706 spin_unlock(&dev->tx_global_lock);
1709 static inline void netif_tx_unlock_bh(struct net_device *dev)
1711 netif_tx_unlock(dev);
1715 #define HARD_TX_LOCK(dev, txq, cpu) { \
1716 if ((dev->features & NETIF_F_LLTX) == 0) { \
1717 __netif_tx_lock(txq, cpu); \
1721 #define HARD_TX_UNLOCK(dev, txq) { \
1722 if ((dev->features & NETIF_F_LLTX) == 0) { \
1723 __netif_tx_unlock(txq); \
1727 static inline void netif_tx_disable(struct net_device *dev)
1733 cpu = smp_processor_id();
1734 for (i = 0; i < dev->num_tx_queues; i++) {
1735 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1737 __netif_tx_lock(txq, cpu);
1738 netif_tx_stop_queue(txq);
1739 __netif_tx_unlock(txq);
1744 static inline void netif_addr_lock(struct net_device *dev)
1746 spin_lock(&dev->addr_list_lock);
1749 static inline void netif_addr_lock_bh(struct net_device *dev)
1751 spin_lock_bh(&dev->addr_list_lock);
1754 static inline void netif_addr_unlock(struct net_device *dev)
1756 spin_unlock(&dev->addr_list_lock);
1759 static inline void netif_addr_unlock_bh(struct net_device *dev)
1761 spin_unlock_bh(&dev->addr_list_lock);
1764 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1766 extern void ether_setup(struct net_device *dev);
1768 /* Support for loadable net-drivers */
1769 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1770 void (*setup)(struct net_device *),
1771 unsigned int queue_count);
1772 #define alloc_netdev(sizeof_priv, name, setup) \
1773 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1774 extern int register_netdev(struct net_device *dev);
1775 extern void unregister_netdev(struct net_device *dev);
1776 /* Functions used for secondary unicast and multicast support */
1777 extern void dev_set_rx_mode(struct net_device *dev);
1778 extern void __dev_set_rx_mode(struct net_device *dev);
1779 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1780 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1781 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1782 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1783 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1784 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1785 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1786 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1787 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1788 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1789 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1790 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1791 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1792 extern int dev_set_allmulti(struct net_device *dev, int inc);
1793 extern void netdev_state_change(struct net_device *dev);
1794 extern void netdev_bonding_change(struct net_device *dev);
1795 extern void netdev_features_change(struct net_device *dev);
1796 /* Load a device via the kmod */
1797 extern void dev_load(struct net *net, const char *name);
1798 extern void dev_mcast_init(void);
1799 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1801 extern int netdev_max_backlog;
1802 extern int weight_p;
1803 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1804 extern int skb_checksum_help(struct sk_buff *skb);
1805 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1807 extern void netdev_rx_csum_fault(struct net_device *dev);
1809 static inline void netdev_rx_csum_fault(struct net_device *dev)
1813 /* rx skb timestamps */
1814 extern void net_enable_timestamp(void);
1815 extern void net_disable_timestamp(void);
1817 #ifdef CONFIG_PROC_FS
1818 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1819 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1820 extern void dev_seq_stop(struct seq_file *seq, void *v);
1823 extern int netdev_class_create_file(struct class_attribute *class_attr);
1824 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1826 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1828 extern void linkwatch_run_queue(void);
1830 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1831 unsigned long mask);
1832 unsigned long netdev_fix_features(unsigned long features, const char *name);
1834 static inline int net_gso_ok(int features, int gso_type)
1836 int feature = gso_type << NETIF_F_GSO_SHIFT;
1837 return (features & feature) == feature;
1840 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1842 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1845 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1847 return skb_is_gso(skb) &&
1848 (!skb_gso_ok(skb, dev->features) ||
1849 (skb_shinfo(skb)->frag_list &&
1850 !(dev->features & NETIF_F_FRAGLIST)) ||
1851 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1854 static inline void netif_set_gso_max_size(struct net_device *dev,
1857 dev->gso_max_size = size;
1860 /* On bonding slaves other than the currently active slave, suppress
1861 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1862 * ARP on active-backup slaves with arp_validate enabled.
1864 static inline int skb_bond_should_drop(struct sk_buff *skb)
1866 struct net_device *dev = skb->dev;
1867 struct net_device *master = dev->master;
1870 if (master->priv_flags & IFF_MASTER_ARPMON)
1871 dev->last_rx = jiffies;
1873 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1874 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1875 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1878 if (master->priv_flags & IFF_MASTER_ALB) {
1879 if (skb->pkt_type != PACKET_BROADCAST &&
1880 skb->pkt_type != PACKET_MULTICAST)
1883 if (master->priv_flags & IFF_MASTER_8023AD &&
1884 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1893 extern struct pernet_operations __net_initdata loopback_net_ops;
1894 #endif /* __KERNEL__ */
1896 #endif /* _LINUX_DEV_H */