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 */
322 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
325 extern void __napi_schedule(struct napi_struct *n);
327 static inline int napi_disable_pending(struct napi_struct *n)
329 return test_bit(NAPI_STATE_DISABLE, &n->state);
333 * napi_schedule_prep - check if napi can be scheduled
336 * Test if NAPI routine is already running, and if not mark
337 * it as running. This is used as a condition variable
338 * insure only one NAPI poll instance runs. We also make
339 * sure there is no pending NAPI disable.
341 static inline int napi_schedule_prep(struct napi_struct *n)
343 return !napi_disable_pending(n) &&
344 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
348 * napi_schedule - schedule NAPI poll
351 * Schedule NAPI poll routine to be called if it is not already
354 static inline void napi_schedule(struct napi_struct *n)
356 if (napi_schedule_prep(n))
360 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
361 static inline int napi_reschedule(struct napi_struct *napi)
363 if (napi_schedule_prep(napi)) {
364 __napi_schedule(napi);
371 * napi_complete - NAPI processing complete
374 * Mark NAPI processing as complete.
376 static inline void __napi_complete(struct napi_struct *n)
378 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
379 list_del(&n->poll_list);
380 smp_mb__before_clear_bit();
381 clear_bit(NAPI_STATE_SCHED, &n->state);
384 static inline void napi_complete(struct napi_struct *n)
388 local_irq_save(flags);
390 local_irq_restore(flags);
394 * napi_disable - prevent NAPI from scheduling
397 * Stop NAPI from being scheduled on this context.
398 * Waits till any outstanding processing completes.
400 static inline void napi_disable(struct napi_struct *n)
402 set_bit(NAPI_STATE_DISABLE, &n->state);
403 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
405 clear_bit(NAPI_STATE_DISABLE, &n->state);
409 * napi_enable - enable NAPI scheduling
412 * Resume NAPI from being scheduled on this context.
413 * Must be paired with napi_disable.
415 static inline void napi_enable(struct napi_struct *n)
417 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
418 smp_mb__before_clear_bit();
419 clear_bit(NAPI_STATE_SCHED, &n->state);
424 * napi_synchronize - wait until NAPI is not running
427 * Wait until NAPI is done being scheduled on this context.
428 * Waits till any outstanding processing completes but
429 * does not disable future activations.
431 static inline void napi_synchronize(const struct napi_struct *n)
433 while (test_bit(NAPI_STATE_SCHED, &n->state))
437 # define napi_synchronize(n) barrier()
440 enum netdev_queue_state_t
443 __QUEUE_STATE_FROZEN,
446 struct netdev_queue {
447 struct net_device *dev;
450 spinlock_t _xmit_lock;
452 struct Qdisc *qdisc_sleeping;
453 } ____cacheline_aligned_in_smp;
456 * The DEVICE structure.
457 * Actually, this whole structure is a big mistake. It mixes I/O
458 * data with strictly "high-level" data, and it has to know about
459 * almost every data structure used in the INET module.
461 * FIXME: cleanup struct net_device such that network protocol info
469 * This is the first field of the "visible" part of this structure
470 * (i.e. as seen by users in the "Space.c" file). It is the name
474 /* device name hash chain */
475 struct hlist_node name_hlist;
480 * I/O specific fields
481 * FIXME: Merge these and struct ifmap into one
483 unsigned long mem_end; /* shared mem end */
484 unsigned long mem_start; /* shared mem start */
485 unsigned long base_addr; /* device I/O address */
486 unsigned int irq; /* device IRQ number */
489 * Some hardware also needs these fields, but they are not
490 * part of the usual set specified in Space.c.
493 unsigned char if_port; /* Selectable AUI, TP,..*/
494 unsigned char dma; /* DMA channel */
498 struct list_head dev_list;
499 #ifdef CONFIG_NETPOLL
500 struct list_head napi_list;
503 /* The device initialization function. Called only once. */
504 int (*init)(struct net_device *dev);
506 /* ------- Fields preinitialized in Space.c finish here ------- */
508 /* Net device features */
509 unsigned long features;
510 #define NETIF_F_SG 1 /* Scatter/gather IO. */
511 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
512 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
513 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
514 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
515 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
516 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
517 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
518 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
519 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
520 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
521 #define NETIF_F_GSO 2048 /* Enable software GSO. */
522 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
523 /* do not use LLTX in new drivers */
524 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
525 #define NETIF_F_LRO 32768 /* large receive offload */
527 /* Segmentation offload features */
528 #define NETIF_F_GSO_SHIFT 16
529 #define NETIF_F_GSO_MASK 0xffff0000
530 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
531 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
532 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
533 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
534 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
536 /* List of features with software fallbacks. */
537 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
540 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
541 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
542 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
543 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
546 * If one device supports one of these features, then enable them
547 * for all in netdev_increment_features.
549 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
550 NETIF_F_SG | NETIF_F_HIGHDMA | \
553 /* Interface index. Unique device identifier */
558 struct net_device_stats* (*get_stats)(struct net_device *dev);
559 struct net_device_stats stats;
561 #ifdef CONFIG_WIRELESS_EXT
562 /* List of functions to handle Wireless Extensions (instead of ioctl).
563 * See <net/iw_handler.h> for details. Jean II */
564 const struct iw_handler_def * wireless_handlers;
565 /* Instance data managed by the core of Wireless Extensions. */
566 struct iw_public_data * wireless_data;
568 const struct ethtool_ops *ethtool_ops;
570 /* Hardware header description */
571 const struct header_ops *header_ops;
574 * This marks the end of the "visible" part of the structure. All
575 * fields hereafter are internal to the system, and may change at
576 * will (read: may be cleaned up at will).
580 unsigned int flags; /* interface flags (a la BSD) */
581 unsigned short gflags;
582 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
583 unsigned short padded; /* How much padding added by alloc_netdev() */
585 unsigned char operstate; /* RFC2863 operstate */
586 unsigned char link_mode; /* mapping policy to operstate */
588 unsigned mtu; /* interface MTU value */
589 unsigned short type; /* interface hardware type */
590 unsigned short hard_header_len; /* hardware hdr length */
592 /* extra head- and tailroom the hardware may need, but not in all cases
593 * can this be guaranteed, especially tailroom. Some cases also use
594 * LL_MAX_HEADER instead to allocate the skb.
596 unsigned short needed_headroom;
597 unsigned short needed_tailroom;
599 struct net_device *master; /* Pointer to master device of a group,
600 * which this device is member of.
603 /* Interface address info. */
604 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
605 unsigned char addr_len; /* hardware address length */
606 unsigned short dev_id; /* for shared network cards */
608 spinlock_t addr_list_lock;
609 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
610 int uc_count; /* Number of installed ucasts */
612 struct dev_addr_list *mc_list; /* Multicast mac addresses */
613 int mc_count; /* Number of installed mcasts */
614 unsigned int promiscuity;
615 unsigned int allmulti;
618 /* Protocol specific pointers */
620 #ifdef CONFIG_NET_DSA
621 void *dsa_ptr; /* dsa specific data */
623 void *atalk_ptr; /* AppleTalk link */
624 void *ip_ptr; /* IPv4 specific data */
625 void *dn_ptr; /* DECnet specific data */
626 void *ip6_ptr; /* IPv6 specific data */
627 void *ec_ptr; /* Econet specific data */
628 void *ax25_ptr; /* AX.25 specific data */
629 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
630 assign before registering */
633 * Cache line mostly used on receive path (including eth_type_trans())
635 unsigned long last_rx; /* Time of last Rx */
636 /* Interface address info used in eth_type_trans() */
637 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
638 because most packets are unicast) */
640 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
642 struct netdev_queue rx_queue;
644 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
646 /* Number of TX queues allocated at alloc_netdev_mq() time */
647 unsigned int num_tx_queues;
649 /* Number of TX queues currently active in device */
650 unsigned int real_num_tx_queues;
652 unsigned long tx_queue_len; /* Max frames per queue allowed */
653 spinlock_t tx_global_lock;
655 * One part is mostly used on xmit path (device)
657 void *priv; /* pointer to private data */
658 int (*hard_start_xmit) (struct sk_buff *skb,
659 struct net_device *dev);
660 /* These may be needed for future network-power-down code. */
661 unsigned long trans_start; /* Time (in jiffies) of last Tx */
663 int watchdog_timeo; /* used by dev_watchdog() */
664 struct timer_list watchdog_timer;
667 * refcnt is a very hot point, so align it on SMP
669 /* Number of references to this device */
670 atomic_t refcnt ____cacheline_aligned_in_smp;
672 /* delayed register/unregister */
673 struct list_head todo_list;
674 /* device index hash chain */
675 struct hlist_node index_hlist;
677 struct net_device *link_watch_next;
679 /* register/unregister state machine */
680 enum { NETREG_UNINITIALIZED=0,
681 NETREG_REGISTERED, /* completed register_netdevice */
682 NETREG_UNREGISTERING, /* called unregister_netdevice */
683 NETREG_UNREGISTERED, /* completed unregister todo */
684 NETREG_RELEASED, /* called free_netdev */
687 /* Called after device is detached from network. */
688 void (*uninit)(struct net_device *dev);
689 /* Called after last user reference disappears. */
690 void (*destructor)(struct net_device *dev);
692 /* Pointers to interface service routines. */
693 int (*open)(struct net_device *dev);
694 int (*stop)(struct net_device *dev);
695 #define HAVE_NETDEV_POLL
696 #define HAVE_CHANGE_RX_FLAGS
697 void (*change_rx_flags)(struct net_device *dev,
699 #define HAVE_SET_RX_MODE
700 void (*set_rx_mode)(struct net_device *dev);
701 #define HAVE_MULTICAST
702 void (*set_multicast_list)(struct net_device *dev);
703 #define HAVE_SET_MAC_ADDR
704 int (*set_mac_address)(struct net_device *dev,
706 #define HAVE_VALIDATE_ADDR
707 int (*validate_addr)(struct net_device *dev);
708 #define HAVE_PRIVATE_IOCTL
709 int (*do_ioctl)(struct net_device *dev,
710 struct ifreq *ifr, int cmd);
711 #define HAVE_SET_CONFIG
712 int (*set_config)(struct net_device *dev,
714 #define HAVE_CHANGE_MTU
715 int (*change_mtu)(struct net_device *dev, int new_mtu);
717 #define HAVE_TX_TIMEOUT
718 void (*tx_timeout) (struct net_device *dev);
720 void (*vlan_rx_register)(struct net_device *dev,
721 struct vlan_group *grp);
722 void (*vlan_rx_add_vid)(struct net_device *dev,
724 void (*vlan_rx_kill_vid)(struct net_device *dev,
727 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
728 #ifdef CONFIG_NETPOLL
729 struct netpoll_info *npinfo;
731 #ifdef CONFIG_NET_POLL_CONTROLLER
732 void (*poll_controller)(struct net_device *dev);
735 u16 (*select_queue)(struct net_device *dev,
736 struct sk_buff *skb);
739 /* Network namespace this network device is inside */
743 /* mid-layer private */
747 struct net_bridge_port *br_port;
749 struct macvlan_port *macvlan_port;
751 struct garp_port *garp_port;
753 /* class/net/name entry */
755 /* space for optional statistics and wireless sysfs groups */
756 struct attribute_group *sysfs_groups[3];
758 /* rtnetlink link ops */
759 const struct rtnl_link_ops *rtnl_link_ops;
761 /* VLAN feature mask */
762 unsigned long vlan_features;
764 /* for setting kernel sock attribute on TCP connection setup */
765 #define GSO_MAX_SIZE 65536
766 unsigned int gso_max_size;
768 #define to_net_dev(d) container_of(d, struct net_device, dev)
770 #define NETDEV_ALIGN 32
771 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
774 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
777 return &dev->_tx[index];
780 static inline void netdev_for_each_tx_queue(struct net_device *dev,
781 void (*f)(struct net_device *,
782 struct netdev_queue *,
788 for (i = 0; i < dev->num_tx_queues; i++)
789 f(dev, &dev->_tx[i], arg);
793 * Net namespace inlines
796 struct net *dev_net(const struct net_device *dev)
806 void dev_net_set(struct net_device *dev, struct net *net)
809 release_net(dev->nd_net);
810 dev->nd_net = hold_net(net);
814 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
816 #ifdef CONFIG_NET_DSA_TAG_DSA
817 if (dev->dsa_ptr != NULL)
818 return dsa_uses_dsa_tags(dev->dsa_ptr);
824 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
826 #ifdef CONFIG_NET_DSA_TAG_TRAILER
827 if (dev->dsa_ptr != NULL)
828 return dsa_uses_trailer_tags(dev->dsa_ptr);
835 * netdev_priv - access network device private data
836 * @dev: network device
838 * Get network device private data
840 static inline void *netdev_priv(const struct net_device *dev)
842 return (char *)dev + ((sizeof(struct net_device)
843 + NETDEV_ALIGN_CONST)
844 & ~NETDEV_ALIGN_CONST);
847 /* Set the sysfs physical device reference for the network logical device
848 * if set prior to registration will cause a symlink during initialization.
850 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
853 * netif_napi_add - initialize a napi context
854 * @dev: network device
855 * @napi: napi context
856 * @poll: polling function
857 * @weight: default weight
859 * netif_napi_add() must be used to initialize a napi context prior to calling
860 * *any* of the other napi related functions.
862 static inline void netif_napi_add(struct net_device *dev,
863 struct napi_struct *napi,
864 int (*poll)(struct napi_struct *, int),
867 INIT_LIST_HEAD(&napi->poll_list);
869 napi->weight = weight;
870 #ifdef CONFIG_NETPOLL
872 list_add(&napi->dev_list, &dev->napi_list);
873 spin_lock_init(&napi->poll_lock);
874 napi->poll_owner = -1;
876 set_bit(NAPI_STATE_SCHED, &napi->state);
880 * netif_napi_del - remove a napi context
881 * @napi: napi context
883 * netif_napi_del() removes a napi context from the network device napi list
885 static inline void netif_napi_del(struct napi_struct *napi)
887 #ifdef CONFIG_NETPOLL
888 list_del(&napi->dev_list);
893 __be16 type; /* This is really htons(ether_type). */
894 struct net_device *dev; /* NULL is wildcarded here */
895 int (*func) (struct sk_buff *,
897 struct packet_type *,
898 struct net_device *);
899 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
901 int (*gso_send_check)(struct sk_buff *skb);
902 void *af_packet_priv;
903 struct list_head list;
906 #include <linux/interrupt.h>
907 #include <linux/notifier.h>
909 extern rwlock_t dev_base_lock; /* Device list lock */
912 #define for_each_netdev(net, d) \
913 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
914 #define for_each_netdev_safe(net, d, n) \
915 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
916 #define for_each_netdev_continue(net, d) \
917 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
918 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
920 static inline struct net_device *next_net_device(struct net_device *dev)
922 struct list_head *lh;
926 lh = dev->dev_list.next;
927 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
930 static inline struct net_device *first_net_device(struct net *net)
932 return list_empty(&net->dev_base_head) ? NULL :
933 net_device_entry(net->dev_base_head.next);
936 extern int netdev_boot_setup_check(struct net_device *dev);
937 extern unsigned long netdev_boot_base(const char *prefix, int unit);
938 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
939 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
940 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
941 extern void dev_add_pack(struct packet_type *pt);
942 extern void dev_remove_pack(struct packet_type *pt);
943 extern void __dev_remove_pack(struct packet_type *pt);
945 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
946 unsigned short mask);
947 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
948 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
949 extern int dev_alloc_name(struct net_device *dev, const char *name);
950 extern int dev_open(struct net_device *dev);
951 extern int dev_close(struct net_device *dev);
952 extern void dev_disable_lro(struct net_device *dev);
953 extern int dev_queue_xmit(struct sk_buff *skb);
954 extern int register_netdevice(struct net_device *dev);
955 extern void unregister_netdevice(struct net_device *dev);
956 extern void free_netdev(struct net_device *dev);
957 extern void synchronize_net(void);
958 extern int register_netdevice_notifier(struct notifier_block *nb);
959 extern int unregister_netdevice_notifier(struct notifier_block *nb);
960 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
961 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
962 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
963 extern int dev_restart(struct net_device *dev);
964 #ifdef CONFIG_NETPOLL_TRAP
965 extern int netpoll_trap(void);
968 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
970 const void *daddr, const void *saddr,
973 if (!dev->header_ops || !dev->header_ops->create)
976 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
979 static inline int dev_parse_header(const struct sk_buff *skb,
980 unsigned char *haddr)
982 const struct net_device *dev = skb->dev;
984 if (!dev->header_ops || !dev->header_ops->parse)
986 return dev->header_ops->parse(skb, haddr);
989 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
990 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
991 static inline int unregister_gifconf(unsigned int family)
993 return register_gifconf(family, NULL);
997 * Incoming packets are placed on per-cpu queues so that
998 * no locking is needed.
1002 struct Qdisc *output_queue;
1003 struct sk_buff_head input_pkt_queue;
1004 struct list_head poll_list;
1005 struct sk_buff *completion_queue;
1007 struct napi_struct backlog;
1008 #ifdef CONFIG_NET_DMA
1009 struct dma_chan *net_dma;
1013 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1015 #define HAVE_NETIF_QUEUE
1017 extern void __netif_schedule(struct Qdisc *q);
1019 static inline void netif_schedule_queue(struct netdev_queue *txq)
1021 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1022 __netif_schedule(txq->qdisc);
1025 static inline void netif_tx_schedule_all(struct net_device *dev)
1029 for (i = 0; i < dev->num_tx_queues; i++)
1030 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1033 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1035 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1039 * netif_start_queue - allow transmit
1040 * @dev: network device
1042 * Allow upper layers to call the device hard_start_xmit routine.
1044 static inline void netif_start_queue(struct net_device *dev)
1046 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1049 static inline void netif_tx_start_all_queues(struct net_device *dev)
1053 for (i = 0; i < dev->num_tx_queues; i++) {
1054 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1055 netif_tx_start_queue(txq);
1059 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1061 #ifdef CONFIG_NETPOLL_TRAP
1062 if (netpoll_trap()) {
1063 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1067 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1068 __netif_schedule(dev_queue->qdisc);
1072 * netif_wake_queue - restart transmit
1073 * @dev: network device
1075 * Allow upper layers to call the device hard_start_xmit routine.
1076 * Used for flow control when transmit resources are available.
1078 static inline void netif_wake_queue(struct net_device *dev)
1080 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1083 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1087 for (i = 0; i < dev->num_tx_queues; i++) {
1088 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1089 netif_tx_wake_queue(txq);
1093 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1095 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1099 * netif_stop_queue - stop transmitted packets
1100 * @dev: network device
1102 * Stop upper layers calling the device hard_start_xmit routine.
1103 * Used for flow control when transmit resources are unavailable.
1105 static inline void netif_stop_queue(struct net_device *dev)
1107 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1110 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1114 for (i = 0; i < dev->num_tx_queues; i++) {
1115 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1116 netif_tx_stop_queue(txq);
1120 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1122 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1126 * netif_queue_stopped - test if transmit queue is flowblocked
1127 * @dev: network device
1129 * Test if transmit queue on device is currently unable to send.
1131 static inline int netif_queue_stopped(const struct net_device *dev)
1133 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1136 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1138 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1142 * netif_running - test if up
1143 * @dev: network device
1145 * Test if the device has been brought up.
1147 static inline int netif_running(const struct net_device *dev)
1149 return test_bit(__LINK_STATE_START, &dev->state);
1153 * Routines to manage the subqueues on a device. We only need start
1154 * stop, and a check if it's stopped. All other device management is
1155 * done at the overall netdevice level.
1156 * Also test the device if we're multiqueue.
1160 * netif_start_subqueue - allow sending packets on subqueue
1161 * @dev: network device
1162 * @queue_index: sub queue index
1164 * Start individual transmit queue of a device with multiple transmit queues.
1166 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1168 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1169 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1173 * netif_stop_subqueue - stop sending packets on subqueue
1174 * @dev: network device
1175 * @queue_index: sub queue index
1177 * Stop individual transmit queue of a device with multiple transmit queues.
1179 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1181 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1182 #ifdef CONFIG_NETPOLL_TRAP
1186 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1190 * netif_subqueue_stopped - test status of subqueue
1191 * @dev: network device
1192 * @queue_index: sub queue index
1194 * Check individual transmit queue of a device with multiple transmit queues.
1196 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1199 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1200 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1203 static inline int netif_subqueue_stopped(const struct net_device *dev,
1204 struct sk_buff *skb)
1206 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1210 * netif_wake_subqueue - allow sending packets on subqueue
1211 * @dev: network device
1212 * @queue_index: sub queue index
1214 * Resume individual transmit queue of a device with multiple transmit queues.
1216 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1218 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1219 #ifdef CONFIG_NETPOLL_TRAP
1223 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1224 __netif_schedule(txq->qdisc);
1228 * netif_is_multiqueue - test if device has multiple transmit queues
1229 * @dev: network device
1231 * Check if device has multiple transmit queues
1233 static inline int netif_is_multiqueue(const struct net_device *dev)
1235 return (dev->num_tx_queues > 1);
1238 /* Use this variant when it is known for sure that it
1239 * is executing from hardware interrupt context or with hardware interrupts
1242 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1244 /* Use this variant in places where it could be invoked
1245 * from either hardware interrupt or other context, with hardware interrupts
1246 * either disabled or enabled.
1248 extern void dev_kfree_skb_any(struct sk_buff *skb);
1250 #define HAVE_NETIF_RX 1
1251 extern int netif_rx(struct sk_buff *skb);
1252 extern int netif_rx_ni(struct sk_buff *skb);
1253 #define HAVE_NETIF_RECEIVE_SKB 1
1254 extern int netif_receive_skb(struct sk_buff *skb);
1255 extern void netif_nit_deliver(struct sk_buff *skb);
1256 extern int dev_valid_name(const char *name);
1257 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1258 extern int dev_ethtool(struct net *net, struct ifreq *);
1259 extern unsigned dev_get_flags(const struct net_device *);
1260 extern int dev_change_flags(struct net_device *, unsigned);
1261 extern int dev_change_name(struct net_device *, const char *);
1262 extern int dev_set_alias(struct net_device *, const char *, size_t);
1263 extern int dev_change_net_namespace(struct net_device *,
1264 struct net *, const char *);
1265 extern int dev_set_mtu(struct net_device *, int);
1266 extern int dev_set_mac_address(struct net_device *,
1268 extern int dev_hard_start_xmit(struct sk_buff *skb,
1269 struct net_device *dev,
1270 struct netdev_queue *txq);
1272 extern int netdev_budget;
1274 /* Called by rtnetlink.c:rtnl_unlock() */
1275 extern void netdev_run_todo(void);
1278 * dev_put - release reference to device
1279 * @dev: network device
1281 * Release reference to device to allow it to be freed.
1283 static inline void dev_put(struct net_device *dev)
1285 atomic_dec(&dev->refcnt);
1289 * dev_hold - get reference to device
1290 * @dev: network device
1292 * Hold reference to device to keep it from being freed.
1294 static inline void dev_hold(struct net_device *dev)
1296 atomic_inc(&dev->refcnt);
1299 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1300 * and _off may be called from IRQ context, but it is caller
1301 * who is responsible for serialization of these calls.
1303 * The name carrier is inappropriate, these functions should really be
1304 * called netif_lowerlayer_*() because they represent the state of any
1305 * kind of lower layer not just hardware media.
1308 extern void linkwatch_fire_event(struct net_device *dev);
1311 * netif_carrier_ok - test if carrier present
1312 * @dev: network device
1314 * Check if carrier is present on device
1316 static inline int netif_carrier_ok(const struct net_device *dev)
1318 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1321 extern void __netdev_watchdog_up(struct net_device *dev);
1323 extern void netif_carrier_on(struct net_device *dev);
1325 extern void netif_carrier_off(struct net_device *dev);
1328 * netif_dormant_on - mark device as dormant.
1329 * @dev: network device
1331 * Mark device as dormant (as per RFC2863).
1333 * The dormant state indicates that the relevant interface is not
1334 * actually in a condition to pass packets (i.e., it is not 'up') but is
1335 * in a "pending" state, waiting for some external event. For "on-
1336 * demand" interfaces, this new state identifies the situation where the
1337 * interface is waiting for events to place it in the up state.
1340 static inline void netif_dormant_on(struct net_device *dev)
1342 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1343 linkwatch_fire_event(dev);
1347 * netif_dormant_off - set device as not dormant.
1348 * @dev: network device
1350 * Device is not in dormant state.
1352 static inline void netif_dormant_off(struct net_device *dev)
1354 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1355 linkwatch_fire_event(dev);
1359 * netif_dormant - test if carrier present
1360 * @dev: network device
1362 * Check if carrier is present on device
1364 static inline int netif_dormant(const struct net_device *dev)
1366 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1371 * netif_oper_up - test if device is operational
1372 * @dev: network device
1374 * Check if carrier is operational
1376 static inline int netif_oper_up(const struct net_device *dev) {
1377 return (dev->operstate == IF_OPER_UP ||
1378 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1382 * netif_device_present - is device available or removed
1383 * @dev: network device
1385 * Check if device has not been removed from system.
1387 static inline int netif_device_present(struct net_device *dev)
1389 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1392 extern void netif_device_detach(struct net_device *dev);
1394 extern void netif_device_attach(struct net_device *dev);
1397 * Network interface message level settings
1399 #define HAVE_NETIF_MSG 1
1402 NETIF_MSG_DRV = 0x0001,
1403 NETIF_MSG_PROBE = 0x0002,
1404 NETIF_MSG_LINK = 0x0004,
1405 NETIF_MSG_TIMER = 0x0008,
1406 NETIF_MSG_IFDOWN = 0x0010,
1407 NETIF_MSG_IFUP = 0x0020,
1408 NETIF_MSG_RX_ERR = 0x0040,
1409 NETIF_MSG_TX_ERR = 0x0080,
1410 NETIF_MSG_TX_QUEUED = 0x0100,
1411 NETIF_MSG_INTR = 0x0200,
1412 NETIF_MSG_TX_DONE = 0x0400,
1413 NETIF_MSG_RX_STATUS = 0x0800,
1414 NETIF_MSG_PKTDATA = 0x1000,
1415 NETIF_MSG_HW = 0x2000,
1416 NETIF_MSG_WOL = 0x4000,
1419 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1420 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1421 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1422 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1423 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1424 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1425 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1426 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1427 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1428 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1429 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1430 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1431 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1432 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1433 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1435 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1438 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1439 return default_msg_enable_bits;
1440 if (debug_value == 0) /* no output */
1442 /* set low N bits */
1443 return (1 << debug_value) - 1;
1446 /* Test if receive needs to be scheduled but only if up */
1447 static inline int netif_rx_schedule_prep(struct net_device *dev,
1448 struct napi_struct *napi)
1450 return napi_schedule_prep(napi);
1453 /* Add interface to tail of rx poll list. This assumes that _prep has
1454 * already been called and returned 1.
1456 static inline void __netif_rx_schedule(struct net_device *dev,
1457 struct napi_struct *napi)
1459 __napi_schedule(napi);
1462 /* Try to reschedule poll. Called by irq handler. */
1464 static inline void netif_rx_schedule(struct net_device *dev,
1465 struct napi_struct *napi)
1467 if (netif_rx_schedule_prep(dev, napi))
1468 __netif_rx_schedule(dev, napi);
1471 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1472 static inline int netif_rx_reschedule(struct net_device *dev,
1473 struct napi_struct *napi)
1475 if (napi_schedule_prep(napi)) {
1476 __netif_rx_schedule(dev, napi);
1482 /* same as netif_rx_complete, except that local_irq_save(flags)
1483 * has already been issued
1485 static inline void __netif_rx_complete(struct net_device *dev,
1486 struct napi_struct *napi)
1488 __napi_complete(napi);
1491 /* Remove interface from poll list: it must be in the poll list
1492 * on current cpu. This primitive is called by dev->poll(), when
1493 * it completes the work. The device cannot be out of poll list at this
1494 * moment, it is BUG().
1496 static inline void netif_rx_complete(struct net_device *dev,
1497 struct napi_struct *napi)
1499 unsigned long flags;
1502 * don't let napi dequeue from the cpu poll list
1503 * just in case its running on a different cpu
1505 if (unlikely(test_bit(NAPI_STATE_NPSVC, &napi->state)))
1507 local_irq_save(flags);
1508 __netif_rx_complete(dev, napi);
1509 local_irq_restore(flags);
1512 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1514 spin_lock(&txq->_xmit_lock);
1515 txq->xmit_lock_owner = cpu;
1518 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1520 spin_lock_bh(&txq->_xmit_lock);
1521 txq->xmit_lock_owner = smp_processor_id();
1524 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1526 int ok = spin_trylock(&txq->_xmit_lock);
1528 txq->xmit_lock_owner = smp_processor_id();
1532 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1534 txq->xmit_lock_owner = -1;
1535 spin_unlock(&txq->_xmit_lock);
1538 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1540 txq->xmit_lock_owner = -1;
1541 spin_unlock_bh(&txq->_xmit_lock);
1545 * netif_tx_lock - grab network device transmit lock
1546 * @dev: network device
1548 * Get network device transmit lock
1550 static inline void netif_tx_lock(struct net_device *dev)
1555 spin_lock(&dev->tx_global_lock);
1556 cpu = smp_processor_id();
1557 for (i = 0; i < dev->num_tx_queues; i++) {
1558 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1560 /* We are the only thread of execution doing a
1561 * freeze, but we have to grab the _xmit_lock in
1562 * order to synchronize with threads which are in
1563 * the ->hard_start_xmit() handler and already
1564 * checked the frozen bit.
1566 __netif_tx_lock(txq, cpu);
1567 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1568 __netif_tx_unlock(txq);
1572 static inline void netif_tx_lock_bh(struct net_device *dev)
1578 static inline void netif_tx_unlock(struct net_device *dev)
1582 for (i = 0; i < dev->num_tx_queues; i++) {
1583 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1585 /* No need to grab the _xmit_lock here. If the
1586 * queue is not stopped for another reason, we
1589 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1590 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1591 __netif_schedule(txq->qdisc);
1593 spin_unlock(&dev->tx_global_lock);
1596 static inline void netif_tx_unlock_bh(struct net_device *dev)
1598 netif_tx_unlock(dev);
1602 #define HARD_TX_LOCK(dev, txq, cpu) { \
1603 if ((dev->features & NETIF_F_LLTX) == 0) { \
1604 __netif_tx_lock(txq, cpu); \
1608 #define HARD_TX_UNLOCK(dev, txq) { \
1609 if ((dev->features & NETIF_F_LLTX) == 0) { \
1610 __netif_tx_unlock(txq); \
1614 static inline void netif_tx_disable(struct net_device *dev)
1620 cpu = smp_processor_id();
1621 for (i = 0; i < dev->num_tx_queues; i++) {
1622 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1624 __netif_tx_lock(txq, cpu);
1625 netif_tx_stop_queue(txq);
1626 __netif_tx_unlock(txq);
1631 static inline void netif_addr_lock(struct net_device *dev)
1633 spin_lock(&dev->addr_list_lock);
1636 static inline void netif_addr_lock_bh(struct net_device *dev)
1638 spin_lock_bh(&dev->addr_list_lock);
1641 static inline void netif_addr_unlock(struct net_device *dev)
1643 spin_unlock(&dev->addr_list_lock);
1646 static inline void netif_addr_unlock_bh(struct net_device *dev)
1648 spin_unlock_bh(&dev->addr_list_lock);
1651 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1653 extern void ether_setup(struct net_device *dev);
1655 /* Support for loadable net-drivers */
1656 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1657 void (*setup)(struct net_device *),
1658 unsigned int queue_count);
1659 #define alloc_netdev(sizeof_priv, name, setup) \
1660 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1661 extern int register_netdev(struct net_device *dev);
1662 extern void unregister_netdev(struct net_device *dev);
1663 /* Functions used for secondary unicast and multicast support */
1664 extern void dev_set_rx_mode(struct net_device *dev);
1665 extern void __dev_set_rx_mode(struct net_device *dev);
1666 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1667 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1668 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1669 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1670 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1671 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1672 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1673 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1674 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1675 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1676 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1677 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1678 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1679 extern int dev_set_allmulti(struct net_device *dev, int inc);
1680 extern void netdev_state_change(struct net_device *dev);
1681 extern void netdev_bonding_change(struct net_device *dev);
1682 extern void netdev_features_change(struct net_device *dev);
1683 /* Load a device via the kmod */
1684 extern void dev_load(struct net *net, const char *name);
1685 extern void dev_mcast_init(void);
1686 extern int netdev_max_backlog;
1687 extern int weight_p;
1688 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1689 extern int skb_checksum_help(struct sk_buff *skb);
1690 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1692 extern void netdev_rx_csum_fault(struct net_device *dev);
1694 static inline void netdev_rx_csum_fault(struct net_device *dev)
1698 /* rx skb timestamps */
1699 extern void net_enable_timestamp(void);
1700 extern void net_disable_timestamp(void);
1702 #ifdef CONFIG_PROC_FS
1703 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1704 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1705 extern void dev_seq_stop(struct seq_file *seq, void *v);
1708 extern int netdev_class_create_file(struct class_attribute *class_attr);
1709 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1711 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1713 extern void linkwatch_run_queue(void);
1715 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1716 unsigned long mask);
1717 unsigned long netdev_fix_features(unsigned long features, const char *name);
1719 static inline int net_gso_ok(int features, int gso_type)
1721 int feature = gso_type << NETIF_F_GSO_SHIFT;
1722 return (features & feature) == feature;
1725 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1727 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1730 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1732 return skb_is_gso(skb) &&
1733 (!skb_gso_ok(skb, dev->features) ||
1734 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1737 static inline void netif_set_gso_max_size(struct net_device *dev,
1740 dev->gso_max_size = size;
1743 /* On bonding slaves other than the currently active slave, suppress
1744 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1745 * ARP on active-backup slaves with arp_validate enabled.
1747 static inline int skb_bond_should_drop(struct sk_buff *skb)
1749 struct net_device *dev = skb->dev;
1750 struct net_device *master = dev->master;
1753 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1754 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1755 skb->protocol == __constant_htons(ETH_P_ARP))
1758 if (master->priv_flags & IFF_MASTER_ALB) {
1759 if (skb->pkt_type != PACKET_BROADCAST &&
1760 skb->pkt_type != PACKET_MULTICAST)
1763 if (master->priv_flags & IFF_MASTER_8023AD &&
1764 skb->protocol == __constant_htons(ETH_P_SLOW))
1772 #endif /* __KERNEL__ */
1774 #endif /* _LINUX_DEV_H */