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>
52 /* source back-compat hooks */
53 #define SET_ETHTOOL_OPS(netdev,ops) \
54 ( (netdev)->ethtool_ops = (ops) )
56 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
57 functions are available. */
58 #define HAVE_FREE_NETDEV /* free_netdev() */
59 #define HAVE_NETDEV_PRIV /* netdev_priv() */
61 #define NET_XMIT_SUCCESS 0
62 #define NET_XMIT_DROP 1 /* skb dropped */
63 #define NET_XMIT_CN 2 /* congestion notification */
64 #define NET_XMIT_POLICED 3 /* skb is shot by police */
65 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
67 /* Backlog congestion levels */
68 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
69 #define NET_RX_DROP 1 /* packet dropped */
70 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
71 #define NET_RX_CN_MOD 3 /* Storm on its way! */
72 #define NET_RX_CN_HIGH 4 /* The storm is here */
73 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
75 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
76 * indicates that the device will soon be dropping packets, or already drops
77 * some packets of the same priority; prompting us to send less aggressively. */
78 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
79 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
83 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
85 /* Driver transmit return codes */
86 #define NETDEV_TX_OK 0 /* driver took care of packet */
87 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
88 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
93 * Compute the worst case header length according to the protocols
97 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
98 # if defined(CONFIG_MAC80211_MESH)
99 # define LL_MAX_HEADER 128
101 # define LL_MAX_HEADER 96
103 #elif defined(CONFIG_TR)
104 # define LL_MAX_HEADER 48
106 # define LL_MAX_HEADER 32
109 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
110 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
111 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
112 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
113 #define MAX_HEADER LL_MAX_HEADER
115 #define MAX_HEADER (LL_MAX_HEADER + 48)
118 #endif /* __KERNEL__ */
121 * Network device statistics. Akin to the 2.0 ether stats but
122 * with byte counters.
125 struct net_device_stats
127 unsigned long rx_packets; /* total packets received */
128 unsigned long tx_packets; /* total packets transmitted */
129 unsigned long rx_bytes; /* total bytes received */
130 unsigned long tx_bytes; /* total bytes transmitted */
131 unsigned long rx_errors; /* bad packets received */
132 unsigned long tx_errors; /* packet transmit problems */
133 unsigned long rx_dropped; /* no space in linux buffers */
134 unsigned long tx_dropped; /* no space available in linux */
135 unsigned long multicast; /* multicast packets received */
136 unsigned long collisions;
138 /* detailed rx_errors: */
139 unsigned long rx_length_errors;
140 unsigned long rx_over_errors; /* receiver ring buff overflow */
141 unsigned long rx_crc_errors; /* recved pkt with crc error */
142 unsigned long rx_frame_errors; /* recv'd frame alignment error */
143 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
144 unsigned long rx_missed_errors; /* receiver missed packet */
146 /* detailed tx_errors */
147 unsigned long tx_aborted_errors;
148 unsigned long tx_carrier_errors;
149 unsigned long tx_fifo_errors;
150 unsigned long tx_heartbeat_errors;
151 unsigned long tx_window_errors;
154 unsigned long rx_compressed;
155 unsigned long tx_compressed;
159 /* Media selection options. */
172 #include <linux/cache.h>
173 #include <linux/skbuff.h>
179 struct netif_rx_stats
183 unsigned time_squeeze;
184 unsigned cpu_collision;
187 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
191 struct dev_addr_list *next;
192 u8 da_addr[MAX_ADDR_LEN];
200 * We tag multicasts with these structures.
203 #define dev_mc_list dev_addr_list
204 #define dmi_addr da_addr
205 #define dmi_addrlen da_addrlen
206 #define dmi_users da_users
207 #define dmi_gusers da_gusers
211 struct hh_cache *hh_next; /* Next entry */
212 atomic_t hh_refcnt; /* number of users */
214 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
216 * They are mostly read, but hh_refcnt may be changed quite frequently,
217 * incurring cache line ping pongs.
219 __be16 hh_type ____cacheline_aligned_in_smp;
220 /* protocol identifier, f.e ETH_P_IP
221 * NOTE: For VLANs, this will be the
222 * encapuslated type. --BLG
224 u16 hh_len; /* length of header */
225 int (*hh_output)(struct sk_buff *skb);
228 /* cached hardware header; allow for machine alignment needs. */
229 #define HH_DATA_MOD 16
230 #define HH_DATA_OFF(__len) \
231 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
232 #define HH_DATA_ALIGN(__len) \
233 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
234 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
237 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
239 * dev->hard_header_len ? (dev->hard_header_len +
240 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
242 * We could use other alignment values, but we must maintain the
243 * relationship HH alignment <= LL alignment.
245 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
248 #define LL_RESERVED_SPACE(dev) \
249 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
250 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
251 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
252 #define LL_ALLOCATED_SPACE(dev) \
253 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
256 int (*create) (struct sk_buff *skb, struct net_device *dev,
257 unsigned short type, const void *daddr,
258 const void *saddr, unsigned len);
259 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
260 int (*rebuild)(struct sk_buff *skb);
261 #define HAVE_HEADER_CACHE
262 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
263 void (*cache_update)(struct hh_cache *hh,
264 const struct net_device *dev,
265 const unsigned char *haddr);
268 /* These flag bits are private to the generic network queueing
269 * layer, they may not be explicitly referenced by any other
276 __LINK_STATE_PRESENT,
277 __LINK_STATE_NOCARRIER,
278 __LINK_STATE_LINKWATCH_PENDING,
279 __LINK_STATE_DORMANT,
284 * This structure holds at boot time configured netdevice settings. They
285 * are then used in the device probing.
287 struct netdev_boot_setup {
291 #define NETDEV_BOOT_SETUP_MAX 8
293 extern int __init netdev_boot_setup(char *str);
296 * Structure for NAPI scheduling similar to tasklet but with weighting
299 /* The poll_list must only be managed by the entity which
300 * changes the state of the NAPI_STATE_SCHED bit. This means
301 * whoever atomically sets that bit can add this napi_struct
302 * to the per-cpu poll_list, and whoever clears that bit
303 * can remove from the list right before clearing the bit.
305 struct list_head poll_list;
309 int (*poll)(struct napi_struct *, int);
310 #ifdef CONFIG_NETPOLL
311 spinlock_t poll_lock;
313 struct net_device *dev;
314 struct list_head dev_list;
320 NAPI_STATE_SCHED, /* Poll is scheduled */
321 NAPI_STATE_DISABLE, /* Disable pending */
324 extern void __napi_schedule(struct napi_struct *n);
326 static inline int napi_disable_pending(struct napi_struct *n)
328 return test_bit(NAPI_STATE_DISABLE, &n->state);
332 * napi_schedule_prep - check if napi can be scheduled
335 * Test if NAPI routine is already running, and if not mark
336 * it as running. This is used as a condition variable
337 * insure only one NAPI poll instance runs. We also make
338 * sure there is no pending NAPI disable.
340 static inline int napi_schedule_prep(struct napi_struct *n)
342 return !napi_disable_pending(n) &&
343 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
347 * napi_schedule - schedule NAPI poll
350 * Schedule NAPI poll routine to be called if it is not already
353 static inline void napi_schedule(struct napi_struct *n)
355 if (napi_schedule_prep(n))
359 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
360 static inline int napi_reschedule(struct napi_struct *napi)
362 if (napi_schedule_prep(napi)) {
363 __napi_schedule(napi);
370 * napi_complete - NAPI processing complete
373 * Mark NAPI processing as complete.
375 static inline void __napi_complete(struct napi_struct *n)
377 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
378 list_del(&n->poll_list);
379 smp_mb__before_clear_bit();
380 clear_bit(NAPI_STATE_SCHED, &n->state);
383 static inline void napi_complete(struct napi_struct *n)
387 local_irq_save(flags);
389 local_irq_restore(flags);
393 * napi_disable - prevent NAPI from scheduling
396 * Stop NAPI from being scheduled on this context.
397 * Waits till any outstanding processing completes.
399 static inline void napi_disable(struct napi_struct *n)
401 set_bit(NAPI_STATE_DISABLE, &n->state);
402 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
404 clear_bit(NAPI_STATE_DISABLE, &n->state);
408 * napi_enable - enable NAPI scheduling
411 * Resume NAPI from being scheduled on this context.
412 * Must be paired with napi_disable.
414 static inline void napi_enable(struct napi_struct *n)
416 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
417 smp_mb__before_clear_bit();
418 clear_bit(NAPI_STATE_SCHED, &n->state);
423 * napi_synchronize - wait until NAPI is not running
426 * Wait until NAPI is done being scheduled on this context.
427 * Waits till any outstanding processing completes but
428 * does not disable future activations.
430 static inline void napi_synchronize(const struct napi_struct *n)
432 while (test_bit(NAPI_STATE_SCHED, &n->state))
436 # define napi_synchronize(n) barrier()
439 enum netdev_queue_state_t
442 __QUEUE_STATE_FROZEN,
445 struct netdev_queue {
446 struct net_device *dev;
449 spinlock_t _xmit_lock;
451 struct Qdisc *qdisc_sleeping;
452 } ____cacheline_aligned_in_smp;
456 * This structure defines the management hooks for network devices.
457 * The following hooks can be defined; unless noted otherwise, they are
458 * optional and can be filled with a null pointer.
460 * int (*ndo_init)(struct net_device *dev);
461 * This function is called once when network device is registered.
462 * The network device can use this to any late stage initializaton
463 * or semantic validattion. It can fail with an error code which will
464 * be propogated back to register_netdev
466 * void (*ndo_uninit)(struct net_device *dev);
467 * This function is called when device is unregistered or when registration
468 * fails. It is not called if init fails.
470 * int (*ndo_open)(struct net_device *dev);
471 * This function is called when network device transistions to the up
474 * int (*ndo_stop)(struct net_device *dev);
475 * This function is called when network device transistions to the down
478 * int (*ndo_hard_start_xmit)(struct sk_buff *skb, struct net_device *dev);
479 * Called when a packet needs to be transmitted.
480 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
481 * Required can not be NULL.
483 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
484 * Called to decide which queue to when device supports multiple
487 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
488 * This function is called to allow device receiver to make
489 * changes to configuration when multicast or promiscious is enabled.
491 * void (*ndo_set_rx_mode)(struct net_device *dev);
492 * This function is called device changes address list filtering.
494 * void (*ndo_set_multicast_list)(struct net_device *dev);
495 * This function is called when the multicast address list changes.
497 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
498 * This function is called when the Media Access Control address
499 * needs to be changed. If not this interface is not defined, the
500 * mac address can not be changed.
502 * int (*ndo_validate_addr)(struct net_device *dev);
503 * Test if Media Access Control address is valid for the device.
505 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
506 * Called when a user request an ioctl which can't be handled by
507 * the generic interface code. If not defined ioctl's return
508 * not supported error code.
510 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
511 * Used to set network devices bus interface parameters. This interface
512 * is retained for legacy reason, new devices should use the bus
513 * interface (PCI) for low level management.
515 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
516 * Called when a user wants to change the Maximum Transfer Unit
517 * of a device. If not defined, any request to change MTU will
518 * will return an error.
520 * void (*ndo_tx_timeout)(struct net_device *dev);
521 * Callback uses when the transmitter has not made any progress
522 * for dev->watchdog ticks.
524 * struct net_device_stats* (*get_stats)(struct net_device *dev);
525 * Called when a user wants to get the network device usage
526 * statistics. If not defined, the counters in dev->stats will
529 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
530 * If device support VLAN receive accleration
531 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
532 * when vlan groups for the device changes. Note: grp is NULL
533 * if no vlan's groups are being used.
535 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
536 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
537 * this function is called when a VLAN id is registered.
539 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
540 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
541 * this function is called when a VLAN id is unregistered.
543 * void (*ndo_poll_controller)(struct net_device *dev);
545 struct net_device_ops {
546 int (*ndo_init)(struct net_device *dev);
547 void (*ndo_uninit)(struct net_device *dev);
548 int (*ndo_open)(struct net_device *dev);
549 int (*ndo_stop)(struct net_device *dev);
550 int (*ndo_start_xmit) (struct sk_buff *skb,
551 struct net_device *dev);
552 u16 (*ndo_select_queue)(struct net_device *dev,
553 struct sk_buff *skb);
554 #define HAVE_CHANGE_RX_FLAGS
555 void (*ndo_change_rx_flags)(struct net_device *dev,
557 #define HAVE_SET_RX_MODE
558 void (*ndo_set_rx_mode)(struct net_device *dev);
559 #define HAVE_MULTICAST
560 void (*ndo_set_multicast_list)(struct net_device *dev);
561 #define HAVE_SET_MAC_ADDR
562 int (*ndo_set_mac_address)(struct net_device *dev,
564 #define HAVE_VALIDATE_ADDR
565 int (*ndo_validate_addr)(struct net_device *dev);
566 #define HAVE_PRIVATE_IOCTL
567 int (*ndo_do_ioctl)(struct net_device *dev,
568 struct ifreq *ifr, int cmd);
569 #define HAVE_SET_CONFIG
570 int (*ndo_set_config)(struct net_device *dev,
572 #define HAVE_CHANGE_MTU
573 int (*ndo_change_mtu)(struct net_device *dev,
575 int (*ndo_neigh_setup)(struct net_device *dev,
576 struct neigh_parms *);
577 #define HAVE_TX_TIMEOUT
578 void (*ndo_tx_timeout) (struct net_device *dev);
580 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
582 void (*ndo_vlan_rx_register)(struct net_device *dev,
583 struct vlan_group *grp);
584 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
586 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
588 #ifdef CONFIG_NET_POLL_CONTROLLER
589 #define HAVE_NETDEV_POLL
590 void (*ndo_poll_controller)(struct net_device *dev);
595 * The DEVICE structure.
596 * Actually, this whole structure is a big mistake. It mixes I/O
597 * data with strictly "high-level" data, and it has to know about
598 * almost every data structure used in the INET module.
600 * FIXME: cleanup struct net_device such that network protocol info
608 * This is the first field of the "visible" part of this structure
609 * (i.e. as seen by users in the "Space.c" file). It is the name
613 /* device name hash chain */
614 struct hlist_node name_hlist;
619 * I/O specific fields
620 * FIXME: Merge these and struct ifmap into one
622 unsigned long mem_end; /* shared mem end */
623 unsigned long mem_start; /* shared mem start */
624 unsigned long base_addr; /* device I/O address */
625 unsigned int irq; /* device IRQ number */
628 * Some hardware also needs these fields, but they are not
629 * part of the usual set specified in Space.c.
632 unsigned char if_port; /* Selectable AUI, TP,..*/
633 unsigned char dma; /* DMA channel */
637 struct list_head dev_list;
638 #ifdef CONFIG_NETPOLL
639 struct list_head napi_list;
642 /* Net device features */
643 unsigned long features;
644 #define NETIF_F_SG 1 /* Scatter/gather IO. */
645 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
646 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
647 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
648 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
649 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
650 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
651 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
652 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
653 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
654 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
655 #define NETIF_F_GSO 2048 /* Enable software GSO. */
656 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
657 /* do not use LLTX in new drivers */
658 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
659 #define NETIF_F_LRO 32768 /* large receive offload */
661 /* Segmentation offload features */
662 #define NETIF_F_GSO_SHIFT 16
663 #define NETIF_F_GSO_MASK 0xffff0000
664 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
665 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
666 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
667 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
668 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
670 /* List of features with software fallbacks. */
671 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
674 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
675 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
676 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
677 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
680 * If one device supports one of these features, then enable them
681 * for all in netdev_increment_features.
683 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
684 NETIF_F_SG | NETIF_F_HIGHDMA | \
687 /* Interface index. Unique device identifier */
691 struct net_device_stats stats;
693 #ifdef CONFIG_WIRELESS_EXT
694 /* List of functions to handle Wireless Extensions (instead of ioctl).
695 * See <net/iw_handler.h> for details. Jean II */
696 const struct iw_handler_def * wireless_handlers;
697 /* Instance data managed by the core of Wireless Extensions. */
698 struct iw_public_data * wireless_data;
700 /* Management operations */
701 const struct net_device_ops *netdev_ops;
702 const struct ethtool_ops *ethtool_ops;
704 /* Hardware header description */
705 const struct header_ops *header_ops;
707 unsigned int flags; /* interface flags (a la BSD) */
708 unsigned short gflags;
709 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
710 unsigned short padded; /* How much padding added by alloc_netdev() */
712 unsigned char operstate; /* RFC2863 operstate */
713 unsigned char link_mode; /* mapping policy to operstate */
715 unsigned mtu; /* interface MTU value */
716 unsigned short type; /* interface hardware type */
717 unsigned short hard_header_len; /* hardware hdr length */
719 /* extra head- and tailroom the hardware may need, but not in all cases
720 * can this be guaranteed, especially tailroom. Some cases also use
721 * LL_MAX_HEADER instead to allocate the skb.
723 unsigned short needed_headroom;
724 unsigned short needed_tailroom;
726 struct net_device *master; /* Pointer to master device of a group,
727 * which this device is member of.
730 /* Interface address info. */
731 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
732 unsigned char addr_len; /* hardware address length */
733 unsigned short dev_id; /* for shared network cards */
735 spinlock_t addr_list_lock;
736 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
737 int uc_count; /* Number of installed ucasts */
739 struct dev_addr_list *mc_list; /* Multicast mac addresses */
740 int mc_count; /* Number of installed mcasts */
741 unsigned int promiscuity;
742 unsigned int allmulti;
745 /* Protocol specific pointers */
747 #ifdef CONFIG_NET_DSA
748 void *dsa_ptr; /* dsa specific data */
750 void *atalk_ptr; /* AppleTalk link */
751 void *ip_ptr; /* IPv4 specific data */
752 void *dn_ptr; /* DECnet specific data */
753 void *ip6_ptr; /* IPv6 specific data */
754 void *ec_ptr; /* Econet specific data */
755 void *ax25_ptr; /* AX.25 specific data */
756 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
757 assign before registering */
760 * Cache line mostly used on receive path (including eth_type_trans())
762 unsigned long last_rx; /* Time of last Rx */
763 /* Interface address info used in eth_type_trans() */
764 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
765 because most packets are unicast) */
767 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
769 struct netdev_queue rx_queue;
771 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
773 /* Number of TX queues allocated at alloc_netdev_mq() time */
774 unsigned int num_tx_queues;
776 /* Number of TX queues currently active in device */
777 unsigned int real_num_tx_queues;
779 unsigned long tx_queue_len; /* Max frames per queue allowed */
780 spinlock_t tx_global_lock;
782 * One part is mostly used on xmit path (device)
784 void *priv; /* pointer to private data */
785 /* These may be needed for future network-power-down code. */
786 unsigned long trans_start; /* Time (in jiffies) of last Tx */
788 int watchdog_timeo; /* used by dev_watchdog() */
789 struct timer_list watchdog_timer;
791 /* Number of references to this device */
792 atomic_t refcnt ____cacheline_aligned_in_smp;
794 /* delayed register/unregister */
795 struct list_head todo_list;
796 /* device index hash chain */
797 struct hlist_node index_hlist;
799 struct net_device *link_watch_next;
801 /* register/unregister state machine */
802 enum { NETREG_UNINITIALIZED=0,
803 NETREG_REGISTERED, /* completed register_netdevice */
804 NETREG_UNREGISTERING, /* called unregister_netdevice */
805 NETREG_UNREGISTERED, /* completed unregister todo */
806 NETREG_RELEASED, /* called free_netdev */
809 /* Called from unregister, can be used to call free_netdev */
810 void (*destructor)(struct net_device *dev);
812 #ifdef CONFIG_NETPOLL
813 struct netpoll_info *npinfo;
817 /* Network namespace this network device is inside */
821 /* mid-layer private */
825 struct net_bridge_port *br_port;
827 struct macvlan_port *macvlan_port;
829 struct garp_port *garp_port;
831 /* class/net/name entry */
833 /* space for optional statistics and wireless sysfs groups */
834 struct attribute_group *sysfs_groups[3];
836 /* rtnetlink link ops */
837 const struct rtnl_link_ops *rtnl_link_ops;
839 /* VLAN feature mask */
840 unsigned long vlan_features;
842 /* for setting kernel sock attribute on TCP connection setup */
843 #define GSO_MAX_SIZE 65536
844 unsigned int gso_max_size;
846 #ifdef CONFIG_COMPAT_NET_DEV_OPS
848 int (*init)(struct net_device *dev);
849 void (*uninit)(struct net_device *dev);
850 int (*open)(struct net_device *dev);
851 int (*stop)(struct net_device *dev);
852 int (*hard_start_xmit) (struct sk_buff *skb,
853 struct net_device *dev);
854 u16 (*select_queue)(struct net_device *dev,
855 struct sk_buff *skb);
856 void (*change_rx_flags)(struct net_device *dev,
858 void (*set_rx_mode)(struct net_device *dev);
859 void (*set_multicast_list)(struct net_device *dev);
860 int (*set_mac_address)(struct net_device *dev,
862 int (*validate_addr)(struct net_device *dev);
863 int (*do_ioctl)(struct net_device *dev,
864 struct ifreq *ifr, int cmd);
865 int (*set_config)(struct net_device *dev,
867 int (*change_mtu)(struct net_device *dev, int new_mtu);
868 int (*neigh_setup)(struct net_device *dev,
869 struct neigh_parms *);
870 void (*tx_timeout) (struct net_device *dev);
871 struct net_device_stats* (*get_stats)(struct net_device *dev);
872 void (*vlan_rx_register)(struct net_device *dev,
873 struct vlan_group *grp);
874 void (*vlan_rx_add_vid)(struct net_device *dev,
876 void (*vlan_rx_kill_vid)(struct net_device *dev,
878 #ifdef CONFIG_NET_POLL_CONTROLLER
879 void (*poll_controller)(struct net_device *dev);
884 #define to_net_dev(d) container_of(d, struct net_device, dev)
886 #define NETDEV_ALIGN 32
887 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
890 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
893 return &dev->_tx[index];
896 static inline void netdev_for_each_tx_queue(struct net_device *dev,
897 void (*f)(struct net_device *,
898 struct netdev_queue *,
904 for (i = 0; i < dev->num_tx_queues; i++)
905 f(dev, &dev->_tx[i], arg);
909 * Net namespace inlines
912 struct net *dev_net(const struct net_device *dev)
922 void dev_net_set(struct net_device *dev, struct net *net)
925 release_net(dev->nd_net);
926 dev->nd_net = hold_net(net);
930 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
932 #ifdef CONFIG_NET_DSA_TAG_DSA
933 if (dev->dsa_ptr != NULL)
934 return dsa_uses_dsa_tags(dev->dsa_ptr);
940 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
942 #ifdef CONFIG_NET_DSA_TAG_TRAILER
943 if (dev->dsa_ptr != NULL)
944 return dsa_uses_trailer_tags(dev->dsa_ptr);
951 * netdev_priv - access network device private data
952 * @dev: network device
954 * Get network device private data
956 static inline void *netdev_priv(const struct net_device *dev)
958 return (char *)dev + ((sizeof(struct net_device)
959 + NETDEV_ALIGN_CONST)
960 & ~NETDEV_ALIGN_CONST);
963 /* Set the sysfs physical device reference for the network logical device
964 * if set prior to registration will cause a symlink during initialization.
966 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
969 * netif_napi_add - initialize a napi context
970 * @dev: network device
971 * @napi: napi context
972 * @poll: polling function
973 * @weight: default weight
975 * netif_napi_add() must be used to initialize a napi context prior to calling
976 * *any* of the other napi related functions.
978 static inline void netif_napi_add(struct net_device *dev,
979 struct napi_struct *napi,
980 int (*poll)(struct napi_struct *, int),
983 INIT_LIST_HEAD(&napi->poll_list);
985 napi->weight = weight;
986 #ifdef CONFIG_NETPOLL
988 list_add(&napi->dev_list, &dev->napi_list);
989 spin_lock_init(&napi->poll_lock);
990 napi->poll_owner = -1;
992 set_bit(NAPI_STATE_SCHED, &napi->state);
996 * netif_napi_del - remove a napi context
997 * @napi: napi context
999 * netif_napi_del() removes a napi context from the network device napi list
1001 static inline void netif_napi_del(struct napi_struct *napi)
1003 #ifdef CONFIG_NETPOLL
1004 list_del(&napi->dev_list);
1008 struct packet_type {
1009 __be16 type; /* This is really htons(ether_type). */
1010 struct net_device *dev; /* NULL is wildcarded here */
1011 int (*func) (struct sk_buff *,
1012 struct net_device *,
1013 struct packet_type *,
1014 struct net_device *);
1015 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1017 int (*gso_send_check)(struct sk_buff *skb);
1018 void *af_packet_priv;
1019 struct list_head list;
1022 #include <linux/interrupt.h>
1023 #include <linux/notifier.h>
1025 extern rwlock_t dev_base_lock; /* Device list lock */
1028 #define for_each_netdev(net, d) \
1029 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1030 #define for_each_netdev_safe(net, d, n) \
1031 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1032 #define for_each_netdev_continue(net, d) \
1033 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1034 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1036 static inline struct net_device *next_net_device(struct net_device *dev)
1038 struct list_head *lh;
1042 lh = dev->dev_list.next;
1043 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1046 static inline struct net_device *first_net_device(struct net *net)
1048 return list_empty(&net->dev_base_head) ? NULL :
1049 net_device_entry(net->dev_base_head.next);
1052 extern int netdev_boot_setup_check(struct net_device *dev);
1053 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1054 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1055 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1056 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1057 extern void dev_add_pack(struct packet_type *pt);
1058 extern void dev_remove_pack(struct packet_type *pt);
1059 extern void __dev_remove_pack(struct packet_type *pt);
1061 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1062 unsigned short mask);
1063 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1064 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1065 extern int dev_alloc_name(struct net_device *dev, const char *name);
1066 extern int dev_open(struct net_device *dev);
1067 extern int dev_close(struct net_device *dev);
1068 extern void dev_disable_lro(struct net_device *dev);
1069 extern int dev_queue_xmit(struct sk_buff *skb);
1070 extern int register_netdevice(struct net_device *dev);
1071 extern void unregister_netdevice(struct net_device *dev);
1072 extern void free_netdev(struct net_device *dev);
1073 extern void synchronize_net(void);
1074 extern int register_netdevice_notifier(struct notifier_block *nb);
1075 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1076 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1077 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1078 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1079 extern int dev_restart(struct net_device *dev);
1080 #ifdef CONFIG_NETPOLL_TRAP
1081 extern int netpoll_trap(void);
1084 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1085 unsigned short type,
1086 const void *daddr, const void *saddr,
1089 if (!dev->header_ops || !dev->header_ops->create)
1092 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1095 static inline int dev_parse_header(const struct sk_buff *skb,
1096 unsigned char *haddr)
1098 const struct net_device *dev = skb->dev;
1100 if (!dev->header_ops || !dev->header_ops->parse)
1102 return dev->header_ops->parse(skb, haddr);
1105 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1106 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1107 static inline int unregister_gifconf(unsigned int family)
1109 return register_gifconf(family, NULL);
1113 * Incoming packets are placed on per-cpu queues so that
1114 * no locking is needed.
1118 struct Qdisc *output_queue;
1119 struct sk_buff_head input_pkt_queue;
1120 struct list_head poll_list;
1121 struct sk_buff *completion_queue;
1123 struct napi_struct backlog;
1124 #ifdef CONFIG_NET_DMA
1125 struct dma_chan *net_dma;
1129 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1131 #define HAVE_NETIF_QUEUE
1133 extern void __netif_schedule(struct Qdisc *q);
1135 static inline void netif_schedule_queue(struct netdev_queue *txq)
1137 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1138 __netif_schedule(txq->qdisc);
1141 static inline void netif_tx_schedule_all(struct net_device *dev)
1145 for (i = 0; i < dev->num_tx_queues; i++)
1146 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1149 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1151 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1155 * netif_start_queue - allow transmit
1156 * @dev: network device
1158 * Allow upper layers to call the device hard_start_xmit routine.
1160 static inline void netif_start_queue(struct net_device *dev)
1162 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1165 static inline void netif_tx_start_all_queues(struct net_device *dev)
1169 for (i = 0; i < dev->num_tx_queues; i++) {
1170 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1171 netif_tx_start_queue(txq);
1175 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1177 #ifdef CONFIG_NETPOLL_TRAP
1178 if (netpoll_trap()) {
1179 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1183 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1184 __netif_schedule(dev_queue->qdisc);
1188 * netif_wake_queue - restart transmit
1189 * @dev: network device
1191 * Allow upper layers to call the device hard_start_xmit routine.
1192 * Used for flow control when transmit resources are available.
1194 static inline void netif_wake_queue(struct net_device *dev)
1196 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1199 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1203 for (i = 0; i < dev->num_tx_queues; i++) {
1204 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1205 netif_tx_wake_queue(txq);
1209 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1211 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1215 * netif_stop_queue - stop transmitted packets
1216 * @dev: network device
1218 * Stop upper layers calling the device hard_start_xmit routine.
1219 * Used for flow control when transmit resources are unavailable.
1221 static inline void netif_stop_queue(struct net_device *dev)
1223 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1226 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1230 for (i = 0; i < dev->num_tx_queues; i++) {
1231 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1232 netif_tx_stop_queue(txq);
1236 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1238 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1242 * netif_queue_stopped - test if transmit queue is flowblocked
1243 * @dev: network device
1245 * Test if transmit queue on device is currently unable to send.
1247 static inline int netif_queue_stopped(const struct net_device *dev)
1249 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1252 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1254 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1258 * netif_running - test if up
1259 * @dev: network device
1261 * Test if the device has been brought up.
1263 static inline int netif_running(const struct net_device *dev)
1265 return test_bit(__LINK_STATE_START, &dev->state);
1269 * Routines to manage the subqueues on a device. We only need start
1270 * stop, and a check if it's stopped. All other device management is
1271 * done at the overall netdevice level.
1272 * Also test the device if we're multiqueue.
1276 * netif_start_subqueue - allow sending packets on subqueue
1277 * @dev: network device
1278 * @queue_index: sub queue index
1280 * Start individual transmit queue of a device with multiple transmit queues.
1282 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1284 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1285 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1289 * netif_stop_subqueue - stop sending packets on subqueue
1290 * @dev: network device
1291 * @queue_index: sub queue index
1293 * Stop individual transmit queue of a device with multiple transmit queues.
1295 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1297 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1298 #ifdef CONFIG_NETPOLL_TRAP
1302 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1306 * netif_subqueue_stopped - test status of subqueue
1307 * @dev: network device
1308 * @queue_index: sub queue index
1310 * Check individual transmit queue of a device with multiple transmit queues.
1312 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1315 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1316 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1319 static inline int netif_subqueue_stopped(const struct net_device *dev,
1320 struct sk_buff *skb)
1322 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1326 * netif_wake_subqueue - allow sending packets on subqueue
1327 * @dev: network device
1328 * @queue_index: sub queue index
1330 * Resume individual transmit queue of a device with multiple transmit queues.
1332 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1334 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1335 #ifdef CONFIG_NETPOLL_TRAP
1339 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1340 __netif_schedule(txq->qdisc);
1344 * netif_is_multiqueue - test if device has multiple transmit queues
1345 * @dev: network device
1347 * Check if device has multiple transmit queues
1349 static inline int netif_is_multiqueue(const struct net_device *dev)
1351 return (dev->num_tx_queues > 1);
1354 /* Use this variant when it is known for sure that it
1355 * is executing from hardware interrupt context or with hardware interrupts
1358 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1360 /* Use this variant in places where it could be invoked
1361 * from either hardware interrupt or other context, with hardware interrupts
1362 * either disabled or enabled.
1364 extern void dev_kfree_skb_any(struct sk_buff *skb);
1366 #define HAVE_NETIF_RX 1
1367 extern int netif_rx(struct sk_buff *skb);
1368 extern int netif_rx_ni(struct sk_buff *skb);
1369 #define HAVE_NETIF_RECEIVE_SKB 1
1370 extern int netif_receive_skb(struct sk_buff *skb);
1371 extern void netif_nit_deliver(struct sk_buff *skb);
1372 extern int dev_valid_name(const char *name);
1373 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1374 extern int dev_ethtool(struct net *net, struct ifreq *);
1375 extern unsigned dev_get_flags(const struct net_device *);
1376 extern int dev_change_flags(struct net_device *, unsigned);
1377 extern int dev_change_name(struct net_device *, const char *);
1378 extern int dev_set_alias(struct net_device *, const char *, size_t);
1379 extern int dev_change_net_namespace(struct net_device *,
1380 struct net *, const char *);
1381 extern int dev_set_mtu(struct net_device *, int);
1382 extern int dev_set_mac_address(struct net_device *,
1384 extern int dev_hard_start_xmit(struct sk_buff *skb,
1385 struct net_device *dev,
1386 struct netdev_queue *txq);
1388 extern int netdev_budget;
1390 /* Called by rtnetlink.c:rtnl_unlock() */
1391 extern void netdev_run_todo(void);
1394 * dev_put - release reference to device
1395 * @dev: network device
1397 * Release reference to device to allow it to be freed.
1399 static inline void dev_put(struct net_device *dev)
1401 atomic_dec(&dev->refcnt);
1405 * dev_hold - get reference to device
1406 * @dev: network device
1408 * Hold reference to device to keep it from being freed.
1410 static inline void dev_hold(struct net_device *dev)
1412 atomic_inc(&dev->refcnt);
1415 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1416 * and _off may be called from IRQ context, but it is caller
1417 * who is responsible for serialization of these calls.
1419 * The name carrier is inappropriate, these functions should really be
1420 * called netif_lowerlayer_*() because they represent the state of any
1421 * kind of lower layer not just hardware media.
1424 extern void linkwatch_fire_event(struct net_device *dev);
1427 * netif_carrier_ok - test if carrier present
1428 * @dev: network device
1430 * Check if carrier is present on device
1432 static inline int netif_carrier_ok(const struct net_device *dev)
1434 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1437 extern void __netdev_watchdog_up(struct net_device *dev);
1439 extern void netif_carrier_on(struct net_device *dev);
1441 extern void netif_carrier_off(struct net_device *dev);
1444 * netif_dormant_on - mark device as dormant.
1445 * @dev: network device
1447 * Mark device as dormant (as per RFC2863).
1449 * The dormant state indicates that the relevant interface is not
1450 * actually in a condition to pass packets (i.e., it is not 'up') but is
1451 * in a "pending" state, waiting for some external event. For "on-
1452 * demand" interfaces, this new state identifies the situation where the
1453 * interface is waiting for events to place it in the up state.
1456 static inline void netif_dormant_on(struct net_device *dev)
1458 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1459 linkwatch_fire_event(dev);
1463 * netif_dormant_off - set device as not dormant.
1464 * @dev: network device
1466 * Device is not in dormant state.
1468 static inline void netif_dormant_off(struct net_device *dev)
1470 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1471 linkwatch_fire_event(dev);
1475 * netif_dormant - test if carrier present
1476 * @dev: network device
1478 * Check if carrier is present on device
1480 static inline int netif_dormant(const struct net_device *dev)
1482 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1487 * netif_oper_up - test if device is operational
1488 * @dev: network device
1490 * Check if carrier is operational
1492 static inline int netif_oper_up(const struct net_device *dev) {
1493 return (dev->operstate == IF_OPER_UP ||
1494 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1498 * netif_device_present - is device available or removed
1499 * @dev: network device
1501 * Check if device has not been removed from system.
1503 static inline int netif_device_present(struct net_device *dev)
1505 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1508 extern void netif_device_detach(struct net_device *dev);
1510 extern void netif_device_attach(struct net_device *dev);
1513 * Network interface message level settings
1515 #define HAVE_NETIF_MSG 1
1518 NETIF_MSG_DRV = 0x0001,
1519 NETIF_MSG_PROBE = 0x0002,
1520 NETIF_MSG_LINK = 0x0004,
1521 NETIF_MSG_TIMER = 0x0008,
1522 NETIF_MSG_IFDOWN = 0x0010,
1523 NETIF_MSG_IFUP = 0x0020,
1524 NETIF_MSG_RX_ERR = 0x0040,
1525 NETIF_MSG_TX_ERR = 0x0080,
1526 NETIF_MSG_TX_QUEUED = 0x0100,
1527 NETIF_MSG_INTR = 0x0200,
1528 NETIF_MSG_TX_DONE = 0x0400,
1529 NETIF_MSG_RX_STATUS = 0x0800,
1530 NETIF_MSG_PKTDATA = 0x1000,
1531 NETIF_MSG_HW = 0x2000,
1532 NETIF_MSG_WOL = 0x4000,
1535 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1536 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1537 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1538 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1539 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1540 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1541 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1542 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1543 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1544 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1545 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1546 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1547 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1548 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1549 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1551 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1554 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1555 return default_msg_enable_bits;
1556 if (debug_value == 0) /* no output */
1558 /* set low N bits */
1559 return (1 << debug_value) - 1;
1562 /* Test if receive needs to be scheduled but only if up */
1563 static inline int netif_rx_schedule_prep(struct net_device *dev,
1564 struct napi_struct *napi)
1566 return napi_schedule_prep(napi);
1569 /* Add interface to tail of rx poll list. This assumes that _prep has
1570 * already been called and returned 1.
1572 static inline void __netif_rx_schedule(struct net_device *dev,
1573 struct napi_struct *napi)
1575 __napi_schedule(napi);
1578 /* Try to reschedule poll. Called by irq handler. */
1580 static inline void netif_rx_schedule(struct net_device *dev,
1581 struct napi_struct *napi)
1583 if (netif_rx_schedule_prep(dev, napi))
1584 __netif_rx_schedule(dev, napi);
1587 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1588 static inline int netif_rx_reschedule(struct net_device *dev,
1589 struct napi_struct *napi)
1591 if (napi_schedule_prep(napi)) {
1592 __netif_rx_schedule(dev, napi);
1598 /* same as netif_rx_complete, except that local_irq_save(flags)
1599 * has already been issued
1601 static inline void __netif_rx_complete(struct net_device *dev,
1602 struct napi_struct *napi)
1604 __napi_complete(napi);
1607 /* Remove interface from poll list: it must be in the poll list
1608 * on current cpu. This primitive is called by dev->poll(), when
1609 * it completes the work. The device cannot be out of poll list at this
1610 * moment, it is BUG().
1612 static inline void netif_rx_complete(struct net_device *dev,
1613 struct napi_struct *napi)
1615 unsigned long flags;
1617 local_irq_save(flags);
1618 __netif_rx_complete(dev, napi);
1619 local_irq_restore(flags);
1622 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1624 spin_lock(&txq->_xmit_lock);
1625 txq->xmit_lock_owner = cpu;
1628 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1630 spin_lock_bh(&txq->_xmit_lock);
1631 txq->xmit_lock_owner = smp_processor_id();
1634 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1636 int ok = spin_trylock(&txq->_xmit_lock);
1638 txq->xmit_lock_owner = smp_processor_id();
1642 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1644 txq->xmit_lock_owner = -1;
1645 spin_unlock(&txq->_xmit_lock);
1648 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1650 txq->xmit_lock_owner = -1;
1651 spin_unlock_bh(&txq->_xmit_lock);
1655 * netif_tx_lock - grab network device transmit lock
1656 * @dev: network device
1658 * Get network device transmit lock
1660 static inline void netif_tx_lock(struct net_device *dev)
1665 spin_lock(&dev->tx_global_lock);
1666 cpu = smp_processor_id();
1667 for (i = 0; i < dev->num_tx_queues; i++) {
1668 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1670 /* We are the only thread of execution doing a
1671 * freeze, but we have to grab the _xmit_lock in
1672 * order to synchronize with threads which are in
1673 * the ->hard_start_xmit() handler and already
1674 * checked the frozen bit.
1676 __netif_tx_lock(txq, cpu);
1677 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1678 __netif_tx_unlock(txq);
1682 static inline void netif_tx_lock_bh(struct net_device *dev)
1688 static inline void netif_tx_unlock(struct net_device *dev)
1692 for (i = 0; i < dev->num_tx_queues; i++) {
1693 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1695 /* No need to grab the _xmit_lock here. If the
1696 * queue is not stopped for another reason, we
1699 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1700 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1701 __netif_schedule(txq->qdisc);
1703 spin_unlock(&dev->tx_global_lock);
1706 static inline void netif_tx_unlock_bh(struct net_device *dev)
1708 netif_tx_unlock(dev);
1712 #define HARD_TX_LOCK(dev, txq, cpu) { \
1713 if ((dev->features & NETIF_F_LLTX) == 0) { \
1714 __netif_tx_lock(txq, cpu); \
1718 #define HARD_TX_UNLOCK(dev, txq) { \
1719 if ((dev->features & NETIF_F_LLTX) == 0) { \
1720 __netif_tx_unlock(txq); \
1724 static inline void netif_tx_disable(struct net_device *dev)
1730 cpu = smp_processor_id();
1731 for (i = 0; i < dev->num_tx_queues; i++) {
1732 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1734 __netif_tx_lock(txq, cpu);
1735 netif_tx_stop_queue(txq);
1736 __netif_tx_unlock(txq);
1741 static inline void netif_addr_lock(struct net_device *dev)
1743 spin_lock(&dev->addr_list_lock);
1746 static inline void netif_addr_lock_bh(struct net_device *dev)
1748 spin_lock_bh(&dev->addr_list_lock);
1751 static inline void netif_addr_unlock(struct net_device *dev)
1753 spin_unlock(&dev->addr_list_lock);
1756 static inline void netif_addr_unlock_bh(struct net_device *dev)
1758 spin_unlock_bh(&dev->addr_list_lock);
1761 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1763 extern void ether_setup(struct net_device *dev);
1765 /* Support for loadable net-drivers */
1766 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1767 void (*setup)(struct net_device *),
1768 unsigned int queue_count);
1769 #define alloc_netdev(sizeof_priv, name, setup) \
1770 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1771 extern int register_netdev(struct net_device *dev);
1772 extern void unregister_netdev(struct net_device *dev);
1773 /* Functions used for secondary unicast and multicast support */
1774 extern void dev_set_rx_mode(struct net_device *dev);
1775 extern void __dev_set_rx_mode(struct net_device *dev);
1776 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1777 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1778 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1779 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1780 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1781 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1782 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1783 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1784 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1785 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1786 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1787 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1788 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1789 extern int dev_set_allmulti(struct net_device *dev, int inc);
1790 extern void netdev_state_change(struct net_device *dev);
1791 extern void netdev_bonding_change(struct net_device *dev);
1792 extern void netdev_features_change(struct net_device *dev);
1793 /* Load a device via the kmod */
1794 extern void dev_load(struct net *net, const char *name);
1795 extern void dev_mcast_init(void);
1796 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1798 extern int netdev_max_backlog;
1799 extern int weight_p;
1800 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1801 extern int skb_checksum_help(struct sk_buff *skb);
1802 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1804 extern void netdev_rx_csum_fault(struct net_device *dev);
1806 static inline void netdev_rx_csum_fault(struct net_device *dev)
1810 /* rx skb timestamps */
1811 extern void net_enable_timestamp(void);
1812 extern void net_disable_timestamp(void);
1814 #ifdef CONFIG_PROC_FS
1815 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1816 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1817 extern void dev_seq_stop(struct seq_file *seq, void *v);
1820 extern int netdev_class_create_file(struct class_attribute *class_attr);
1821 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1823 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1825 extern void linkwatch_run_queue(void);
1827 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1828 unsigned long mask);
1829 unsigned long netdev_fix_features(unsigned long features, const char *name);
1831 static inline int net_gso_ok(int features, int gso_type)
1833 int feature = gso_type << NETIF_F_GSO_SHIFT;
1834 return (features & feature) == feature;
1837 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1839 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1842 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1844 return skb_is_gso(skb) &&
1845 (!skb_gso_ok(skb, dev->features) ||
1846 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1849 static inline void netif_set_gso_max_size(struct net_device *dev,
1852 dev->gso_max_size = size;
1855 /* On bonding slaves other than the currently active slave, suppress
1856 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1857 * ARP on active-backup slaves with arp_validate enabled.
1859 static inline int skb_bond_should_drop(struct sk_buff *skb)
1861 struct net_device *dev = skb->dev;
1862 struct net_device *master = dev->master;
1865 if (master->priv_flags & IFF_MASTER_ARPMON)
1866 dev->last_rx = jiffies;
1868 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1869 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1870 skb->protocol == __constant_htons(ETH_P_ARP))
1873 if (master->priv_flags & IFF_MASTER_ALB) {
1874 if (skb->pkt_type != PACKET_BROADCAST &&
1875 skb->pkt_type != PACKET_MULTICAST)
1878 if (master->priv_flags & IFF_MASTER_8023AD &&
1879 skb->protocol == __constant_htons(ETH_P_SLOW))
1888 extern struct pernet_operations __net_initdata loopback_net_ops;
1889 #endif /* __KERNEL__ */
1891 #endif /* _LINUX_DEV_H */