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.Cox@linux.org>
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>
51 /* source back-compat hooks */
52 #define SET_ETHTOOL_OPS(netdev,ops) \
53 ( (netdev)->ethtool_ops = (ops) )
55 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
56 functions are available. */
57 #define HAVE_FREE_NETDEV /* free_netdev() */
58 #define HAVE_NETDEV_PRIV /* netdev_priv() */
60 #define NET_XMIT_SUCCESS 0
61 #define NET_XMIT_DROP 1 /* skb dropped */
62 #define NET_XMIT_CN 2 /* congestion notification */
63 #define NET_XMIT_POLICED 3 /* skb is shot by police */
64 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
66 /* Backlog congestion levels */
67 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
68 #define NET_RX_DROP 1 /* packet dropped */
69 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
70 #define NET_RX_CN_MOD 3 /* Storm on its way! */
71 #define NET_RX_CN_HIGH 4 /* The storm is here */
72 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
74 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
75 * indicates that the device will soon be dropping packets, or already drops
76 * some packets of the same priority; prompting us to send less aggressively. */
77 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
78 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
82 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
84 /* Driver transmit return codes */
85 #define NETDEV_TX_OK 0 /* driver took care of packet */
86 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
87 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
92 * Compute the worst case header length according to the protocols
96 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
97 # if defined(CONFIG_MAC80211_MESH)
98 # define LL_MAX_HEADER 128
100 # define LL_MAX_HEADER 96
102 #elif defined(CONFIG_TR)
103 # define LL_MAX_HEADER 48
105 # define LL_MAX_HEADER 32
108 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
109 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
110 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
111 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
112 #define MAX_HEADER LL_MAX_HEADER
114 #define MAX_HEADER (LL_MAX_HEADER + 48)
117 #endif /* __KERNEL__ */
120 * Network device statistics. Akin to the 2.0 ether stats but
121 * with byte counters.
124 struct net_device_stats
126 unsigned long rx_packets; /* total packets received */
127 unsigned long tx_packets; /* total packets transmitted */
128 unsigned long rx_bytes; /* total bytes received */
129 unsigned long tx_bytes; /* total bytes transmitted */
130 unsigned long rx_errors; /* bad packets received */
131 unsigned long tx_errors; /* packet transmit problems */
132 unsigned long rx_dropped; /* no space in linux buffers */
133 unsigned long tx_dropped; /* no space available in linux */
134 unsigned long multicast; /* multicast packets received */
135 unsigned long collisions;
137 /* detailed rx_errors: */
138 unsigned long rx_length_errors;
139 unsigned long rx_over_errors; /* receiver ring buff overflow */
140 unsigned long rx_crc_errors; /* recved pkt with crc error */
141 unsigned long rx_frame_errors; /* recv'd frame alignment error */
142 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
143 unsigned long rx_missed_errors; /* receiver missed packet */
145 /* detailed tx_errors */
146 unsigned long tx_aborted_errors;
147 unsigned long tx_carrier_errors;
148 unsigned long tx_fifo_errors;
149 unsigned long tx_heartbeat_errors;
150 unsigned long tx_window_errors;
153 unsigned long rx_compressed;
154 unsigned long tx_compressed;
158 /* Media selection options. */
171 #include <linux/cache.h>
172 #include <linux/skbuff.h>
178 struct netif_rx_stats
182 unsigned time_squeeze;
183 unsigned cpu_collision;
186 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
190 struct dev_addr_list *next;
191 u8 da_addr[MAX_ADDR_LEN];
199 * We tag multicasts with these structures.
202 #define dev_mc_list dev_addr_list
203 #define dmi_addr da_addr
204 #define dmi_addrlen da_addrlen
205 #define dmi_users da_users
206 #define dmi_gusers da_gusers
210 struct hh_cache *hh_next; /* Next entry */
211 atomic_t hh_refcnt; /* number of users */
213 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
215 * They are mostly read, but hh_refcnt may be changed quite frequently,
216 * incurring cache line ping pongs.
218 __be16 hh_type ____cacheline_aligned_in_smp;
219 /* protocol identifier, f.e ETH_P_IP
220 * NOTE: For VLANs, this will be the
221 * encapuslated type. --BLG
223 u16 hh_len; /* length of header */
224 int (*hh_output)(struct sk_buff *skb);
227 /* cached hardware header; allow for machine alignment needs. */
228 #define HH_DATA_MOD 16
229 #define HH_DATA_OFF(__len) \
230 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
231 #define HH_DATA_ALIGN(__len) \
232 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
233 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
236 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
238 * dev->hard_header_len ? (dev->hard_header_len +
239 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
241 * We could use other alignment values, but we must maintain the
242 * relationship HH alignment <= LL alignment.
244 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
247 #define LL_RESERVED_SPACE(dev) \
248 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
249 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
250 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
251 #define LL_ALLOCATED_SPACE(dev) \
252 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
255 int (*create) (struct sk_buff *skb, struct net_device *dev,
256 unsigned short type, const void *daddr,
257 const void *saddr, unsigned len);
258 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
259 int (*rebuild)(struct sk_buff *skb);
260 #define HAVE_HEADER_CACHE
261 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
262 void (*cache_update)(struct hh_cache *hh,
263 const struct net_device *dev,
264 const unsigned char *haddr);
267 /* These flag bits are private to the generic network queueing
268 * layer, they may not be explicitly referenced by any other
275 __LINK_STATE_PRESENT,
276 __LINK_STATE_NOCARRIER,
277 __LINK_STATE_LINKWATCH_PENDING,
278 __LINK_STATE_DORMANT,
283 * This structure holds at boot time configured netdevice settings. They
284 * are then used in the device probing.
286 struct netdev_boot_setup {
290 #define NETDEV_BOOT_SETUP_MAX 8
292 extern int __init netdev_boot_setup(char *str);
295 * Structure for NAPI scheduling similar to tasklet but with weighting
298 /* The poll_list must only be managed by the entity which
299 * changes the state of the NAPI_STATE_SCHED bit. This means
300 * whoever atomically sets that bit can add this napi_struct
301 * to the per-cpu poll_list, and whoever clears that bit
302 * can remove from the list right before clearing the bit.
304 struct list_head poll_list;
308 int (*poll)(struct napi_struct *, int);
309 #ifdef CONFIG_NETPOLL
310 spinlock_t poll_lock;
312 struct net_device *dev;
313 struct list_head dev_list;
319 NAPI_STATE_SCHED, /* Poll is scheduled */
320 NAPI_STATE_DISABLE, /* Disable pending */
323 extern void __napi_schedule(struct napi_struct *n);
325 static inline int napi_disable_pending(struct napi_struct *n)
327 return test_bit(NAPI_STATE_DISABLE, &n->state);
331 * napi_schedule_prep - check if napi can be scheduled
334 * Test if NAPI routine is already running, and if not mark
335 * it as running. This is used as a condition variable
336 * insure only one NAPI poll instance runs. We also make
337 * sure there is no pending NAPI disable.
339 static inline int napi_schedule_prep(struct napi_struct *n)
341 return !napi_disable_pending(n) &&
342 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
346 * napi_schedule - schedule NAPI poll
349 * Schedule NAPI poll routine to be called if it is not already
352 static inline void napi_schedule(struct napi_struct *n)
354 if (napi_schedule_prep(n))
358 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
359 static inline int napi_reschedule(struct napi_struct *napi)
361 if (napi_schedule_prep(napi)) {
362 __napi_schedule(napi);
369 * napi_complete - NAPI processing complete
372 * Mark NAPI processing as complete.
374 static inline void __napi_complete(struct napi_struct *n)
376 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
377 list_del(&n->poll_list);
378 smp_mb__before_clear_bit();
379 clear_bit(NAPI_STATE_SCHED, &n->state);
382 static inline void napi_complete(struct napi_struct *n)
386 local_irq_save(flags);
388 local_irq_restore(flags);
392 * napi_disable - prevent NAPI from scheduling
395 * Stop NAPI from being scheduled on this context.
396 * Waits till any outstanding processing completes.
398 static inline void napi_disable(struct napi_struct *n)
400 set_bit(NAPI_STATE_DISABLE, &n->state);
401 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
403 clear_bit(NAPI_STATE_DISABLE, &n->state);
407 * napi_enable - enable NAPI scheduling
410 * Resume NAPI from being scheduled on this context.
411 * Must be paired with napi_disable.
413 static inline void napi_enable(struct napi_struct *n)
415 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
416 smp_mb__before_clear_bit();
417 clear_bit(NAPI_STATE_SCHED, &n->state);
422 * napi_synchronize - wait until NAPI is not running
425 * Wait until NAPI is done being scheduled on this context.
426 * Waits till any outstanding processing completes but
427 * does not disable future activations.
429 static inline void napi_synchronize(const struct napi_struct *n)
431 while (test_bit(NAPI_STATE_SCHED, &n->state))
435 # define napi_synchronize(n) barrier()
438 enum netdev_queue_state_t
441 __QUEUE_STATE_FROZEN,
444 struct netdev_queue {
445 struct net_device *dev;
448 spinlock_t _xmit_lock;
450 struct Qdisc *qdisc_sleeping;
451 } ____cacheline_aligned_in_smp;
454 * The DEVICE structure.
455 * Actually, this whole structure is a big mistake. It mixes I/O
456 * data with strictly "high-level" data, and it has to know about
457 * almost every data structure used in the INET module.
459 * FIXME: cleanup struct net_device such that network protocol info
467 * This is the first field of the "visible" part of this structure
468 * (i.e. as seen by users in the "Space.c" file). It is the name
472 /* device name hash chain */
473 struct hlist_node name_hlist;
478 * I/O specific fields
479 * FIXME: Merge these and struct ifmap into one
481 unsigned long mem_end; /* shared mem end */
482 unsigned long mem_start; /* shared mem start */
483 unsigned long base_addr; /* device I/O address */
484 unsigned int irq; /* device IRQ number */
487 * Some hardware also needs these fields, but they are not
488 * part of the usual set specified in Space.c.
491 unsigned char if_port; /* Selectable AUI, TP,..*/
492 unsigned char dma; /* DMA channel */
496 struct list_head dev_list;
497 #ifdef CONFIG_NETPOLL
498 struct list_head napi_list;
501 /* The device initialization function. Called only once. */
502 int (*init)(struct net_device *dev);
504 /* ------- Fields preinitialized in Space.c finish here ------- */
506 /* Net device features */
507 unsigned long features;
508 #define NETIF_F_SG 1 /* Scatter/gather IO. */
509 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
510 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
511 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
512 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
513 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
514 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
515 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
516 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
517 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
518 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
519 #define NETIF_F_GSO 2048 /* Enable software GSO. */
520 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
521 /* do not use LLTX in new drivers */
522 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
523 #define NETIF_F_LRO 32768 /* large receive offload */
525 /* Segmentation offload features */
526 #define NETIF_F_GSO_SHIFT 16
527 #define NETIF_F_GSO_MASK 0xffff0000
528 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
529 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
530 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
531 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
532 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
534 /* List of features with software fallbacks. */
535 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
538 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
539 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
540 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
541 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
543 /* Interface index. Unique device identifier */
548 struct net_device_stats* (*get_stats)(struct net_device *dev);
549 struct net_device_stats stats;
551 #ifdef CONFIG_WIRELESS_EXT
552 /* List of functions to handle Wireless Extensions (instead of ioctl).
553 * See <net/iw_handler.h> for details. Jean II */
554 const struct iw_handler_def * wireless_handlers;
555 /* Instance data managed by the core of Wireless Extensions. */
556 struct iw_public_data * wireless_data;
558 const struct ethtool_ops *ethtool_ops;
560 /* Hardware header description */
561 const struct header_ops *header_ops;
564 * This marks the end of the "visible" part of the structure. All
565 * fields hereafter are internal to the system, and may change at
566 * will (read: may be cleaned up at will).
570 unsigned int flags; /* interface flags (a la BSD) */
571 unsigned short gflags;
572 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
573 unsigned short padded; /* How much padding added by alloc_netdev() */
575 unsigned char operstate; /* RFC2863 operstate */
576 unsigned char link_mode; /* mapping policy to operstate */
578 unsigned mtu; /* interface MTU value */
579 unsigned short type; /* interface hardware type */
580 unsigned short hard_header_len; /* hardware hdr length */
582 /* extra head- and tailroom the hardware may need, but not in all cases
583 * can this be guaranteed, especially tailroom. Some cases also use
584 * LL_MAX_HEADER instead to allocate the skb.
586 unsigned short needed_headroom;
587 unsigned short needed_tailroom;
589 struct net_device *master; /* Pointer to master device of a group,
590 * which this device is member of.
593 /* Interface address info. */
594 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
595 unsigned char addr_len; /* hardware address length */
596 unsigned short dev_id; /* for shared network cards */
598 spinlock_t addr_list_lock;
599 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
600 int uc_count; /* Number of installed ucasts */
602 struct dev_addr_list *mc_list; /* Multicast mac addresses */
603 int mc_count; /* Number of installed mcasts */
604 unsigned int promiscuity;
605 unsigned int allmulti;
608 /* Protocol specific pointers */
610 void *atalk_ptr; /* AppleTalk link */
611 void *ip_ptr; /* IPv4 specific data */
612 void *dn_ptr; /* DECnet specific data */
613 void *ip6_ptr; /* IPv6 specific data */
614 void *ec_ptr; /* Econet specific data */
615 void *ax25_ptr; /* AX.25 specific data */
616 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
617 assign before registering */
620 * Cache line mostly used on receive path (including eth_type_trans())
622 unsigned long last_rx; /* Time of last Rx */
623 /* Interface address info used in eth_type_trans() */
624 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
625 because most packets are unicast) */
627 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
629 struct netdev_queue rx_queue;
631 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
633 /* Number of TX queues allocated at alloc_netdev_mq() time */
634 unsigned int num_tx_queues;
636 /* Number of TX queues currently active in device */
637 unsigned int real_num_tx_queues;
639 unsigned long tx_queue_len; /* Max frames per queue allowed */
640 spinlock_t tx_global_lock;
642 * One part is mostly used on xmit path (device)
644 void *priv; /* pointer to private data */
645 int (*hard_start_xmit) (struct sk_buff *skb,
646 struct net_device *dev);
647 /* These may be needed for future network-power-down code. */
648 unsigned long trans_start; /* Time (in jiffies) of last Tx */
650 int watchdog_timeo; /* used by dev_watchdog() */
651 struct timer_list watchdog_timer;
654 * refcnt is a very hot point, so align it on SMP
656 /* Number of references to this device */
657 atomic_t refcnt ____cacheline_aligned_in_smp;
659 /* delayed register/unregister */
660 struct list_head todo_list;
661 /* device index hash chain */
662 struct hlist_node index_hlist;
664 struct net_device *link_watch_next;
666 /* register/unregister state machine */
667 enum { NETREG_UNINITIALIZED=0,
668 NETREG_REGISTERED, /* completed register_netdevice */
669 NETREG_UNREGISTERING, /* called unregister_netdevice */
670 NETREG_UNREGISTERED, /* completed unregister todo */
671 NETREG_RELEASED, /* called free_netdev */
674 /* Called after device is detached from network. */
675 void (*uninit)(struct net_device *dev);
676 /* Called after last user reference disappears. */
677 void (*destructor)(struct net_device *dev);
679 /* Pointers to interface service routines. */
680 int (*open)(struct net_device *dev);
681 int (*stop)(struct net_device *dev);
682 #define HAVE_NETDEV_POLL
683 #define HAVE_CHANGE_RX_FLAGS
684 void (*change_rx_flags)(struct net_device *dev,
686 #define HAVE_SET_RX_MODE
687 void (*set_rx_mode)(struct net_device *dev);
688 #define HAVE_MULTICAST
689 void (*set_multicast_list)(struct net_device *dev);
690 #define HAVE_SET_MAC_ADDR
691 int (*set_mac_address)(struct net_device *dev,
693 #define HAVE_VALIDATE_ADDR
694 int (*validate_addr)(struct net_device *dev);
695 #define HAVE_PRIVATE_IOCTL
696 int (*do_ioctl)(struct net_device *dev,
697 struct ifreq *ifr, int cmd);
698 #define HAVE_SET_CONFIG
699 int (*set_config)(struct net_device *dev,
701 #define HAVE_CHANGE_MTU
702 int (*change_mtu)(struct net_device *dev, int new_mtu);
704 #define HAVE_TX_TIMEOUT
705 void (*tx_timeout) (struct net_device *dev);
707 void (*vlan_rx_register)(struct net_device *dev,
708 struct vlan_group *grp);
709 void (*vlan_rx_add_vid)(struct net_device *dev,
711 void (*vlan_rx_kill_vid)(struct net_device *dev,
714 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
715 #ifdef CONFIG_NETPOLL
716 struct netpoll_info *npinfo;
718 #ifdef CONFIG_NET_POLL_CONTROLLER
719 void (*poll_controller)(struct net_device *dev);
722 u16 (*select_queue)(struct net_device *dev,
723 struct sk_buff *skb);
726 /* Network namespace this network device is inside */
730 /* mid-layer private */
734 struct net_bridge_port *br_port;
736 struct macvlan_port *macvlan_port;
738 struct garp_port *garp_port;
740 /* class/net/name entry */
742 /* space for optional statistics and wireless sysfs groups */
743 struct attribute_group *sysfs_groups[3];
745 /* rtnetlink link ops */
746 const struct rtnl_link_ops *rtnl_link_ops;
748 /* VLAN feature mask */
749 unsigned long vlan_features;
751 /* for setting kernel sock attribute on TCP connection setup */
752 #define GSO_MAX_SIZE 65536
753 unsigned int gso_max_size;
755 #define to_net_dev(d) container_of(d, struct net_device, dev)
757 #define NETDEV_ALIGN 32
758 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
761 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
764 return &dev->_tx[index];
767 static inline void netdev_for_each_tx_queue(struct net_device *dev,
768 void (*f)(struct net_device *,
769 struct netdev_queue *,
775 for (i = 0; i < dev->num_tx_queues; i++)
776 f(dev, &dev->_tx[i], arg);
780 * Net namespace inlines
783 struct net *dev_net(const struct net_device *dev)
793 void dev_net_set(struct net_device *dev, struct net *net)
796 release_net(dev->nd_net);
797 dev->nd_net = hold_net(net);
802 * netdev_priv - access network device private data
803 * @dev: network device
805 * Get network device private data
807 static inline void *netdev_priv(const struct net_device *dev)
809 return (char *)dev + ((sizeof(struct net_device)
810 + NETDEV_ALIGN_CONST)
811 & ~NETDEV_ALIGN_CONST);
814 /* Set the sysfs physical device reference for the network logical device
815 * if set prior to registration will cause a symlink during initialization.
817 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
820 * netif_napi_add - initialize a napi context
821 * @dev: network device
822 * @napi: napi context
823 * @poll: polling function
824 * @weight: default weight
826 * netif_napi_add() must be used to initialize a napi context prior to calling
827 * *any* of the other napi related functions.
829 static inline void netif_napi_add(struct net_device *dev,
830 struct napi_struct *napi,
831 int (*poll)(struct napi_struct *, int),
834 INIT_LIST_HEAD(&napi->poll_list);
836 napi->weight = weight;
837 #ifdef CONFIG_NETPOLL
839 list_add(&napi->dev_list, &dev->napi_list);
840 spin_lock_init(&napi->poll_lock);
841 napi->poll_owner = -1;
843 set_bit(NAPI_STATE_SCHED, &napi->state);
847 * netif_napi_del - remove a napi context
848 * @napi: napi context
850 * netif_napi_del() removes a napi context from the network device napi list
852 static inline void netif_napi_del(struct napi_struct *napi)
854 #ifdef CONFIG_NETPOLL
855 list_del(&napi->dev_list);
860 __be16 type; /* This is really htons(ether_type). */
861 struct net_device *dev; /* NULL is wildcarded here */
862 int (*func) (struct sk_buff *,
864 struct packet_type *,
865 struct net_device *);
866 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
868 int (*gso_send_check)(struct sk_buff *skb);
869 void *af_packet_priv;
870 struct list_head list;
873 #include <linux/interrupt.h>
874 #include <linux/notifier.h>
876 extern rwlock_t dev_base_lock; /* Device list lock */
879 #define for_each_netdev(net, d) \
880 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
881 #define for_each_netdev_safe(net, d, n) \
882 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
883 #define for_each_netdev_continue(net, d) \
884 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
885 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
887 static inline struct net_device *next_net_device(struct net_device *dev)
889 struct list_head *lh;
893 lh = dev->dev_list.next;
894 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
897 static inline struct net_device *first_net_device(struct net *net)
899 return list_empty(&net->dev_base_head) ? NULL :
900 net_device_entry(net->dev_base_head.next);
903 extern int netdev_boot_setup_check(struct net_device *dev);
904 extern unsigned long netdev_boot_base(const char *prefix, int unit);
905 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
906 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
907 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
908 extern void dev_add_pack(struct packet_type *pt);
909 extern void dev_remove_pack(struct packet_type *pt);
910 extern void __dev_remove_pack(struct packet_type *pt);
912 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
913 unsigned short mask);
914 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
915 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
916 extern int dev_alloc_name(struct net_device *dev, const char *name);
917 extern int dev_open(struct net_device *dev);
918 extern int dev_close(struct net_device *dev);
919 extern void dev_disable_lro(struct net_device *dev);
920 extern int dev_queue_xmit(struct sk_buff *skb);
921 extern int register_netdevice(struct net_device *dev);
922 extern void unregister_netdevice(struct net_device *dev);
923 extern void free_netdev(struct net_device *dev);
924 extern void synchronize_net(void);
925 extern int register_netdevice_notifier(struct notifier_block *nb);
926 extern int unregister_netdevice_notifier(struct notifier_block *nb);
927 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
928 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
929 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
930 extern int dev_restart(struct net_device *dev);
931 #ifdef CONFIG_NETPOLL_TRAP
932 extern int netpoll_trap(void);
935 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
937 const void *daddr, const void *saddr,
940 if (!dev->header_ops || !dev->header_ops->create)
943 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
946 static inline int dev_parse_header(const struct sk_buff *skb,
947 unsigned char *haddr)
949 const struct net_device *dev = skb->dev;
951 if (!dev->header_ops || !dev->header_ops->parse)
953 return dev->header_ops->parse(skb, haddr);
956 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
957 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
958 static inline int unregister_gifconf(unsigned int family)
960 return register_gifconf(family, NULL);
964 * Incoming packets are placed on per-cpu queues so that
965 * no locking is needed.
969 struct Qdisc *output_queue;
970 struct sk_buff_head input_pkt_queue;
971 struct list_head poll_list;
972 struct sk_buff *completion_queue;
974 struct napi_struct backlog;
975 #ifdef CONFIG_NET_DMA
976 struct dma_chan *net_dma;
980 DECLARE_PER_CPU(struct softnet_data,softnet_data);
982 #define HAVE_NETIF_QUEUE
984 extern void __netif_schedule(struct Qdisc *q);
986 static inline void netif_schedule_queue(struct netdev_queue *txq)
988 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
989 __netif_schedule(txq->qdisc);
992 static inline void netif_tx_schedule_all(struct net_device *dev)
996 for (i = 0; i < dev->num_tx_queues; i++)
997 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1000 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1002 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1006 * netif_start_queue - allow transmit
1007 * @dev: network device
1009 * Allow upper layers to call the device hard_start_xmit routine.
1011 static inline void netif_start_queue(struct net_device *dev)
1013 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1016 static inline void netif_tx_start_all_queues(struct net_device *dev)
1020 for (i = 0; i < dev->num_tx_queues; i++) {
1021 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1022 netif_tx_start_queue(txq);
1026 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1028 #ifdef CONFIG_NETPOLL_TRAP
1029 if (netpoll_trap()) {
1030 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1034 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1035 __netif_schedule(dev_queue->qdisc);
1039 * netif_wake_queue - restart transmit
1040 * @dev: network device
1042 * Allow upper layers to call the device hard_start_xmit routine.
1043 * Used for flow control when transmit resources are available.
1045 static inline void netif_wake_queue(struct net_device *dev)
1047 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1050 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1054 for (i = 0; i < dev->num_tx_queues; i++) {
1055 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1056 netif_tx_wake_queue(txq);
1060 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1062 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1066 * netif_stop_queue - stop transmitted packets
1067 * @dev: network device
1069 * Stop upper layers calling the device hard_start_xmit routine.
1070 * Used for flow control when transmit resources are unavailable.
1072 static inline void netif_stop_queue(struct net_device *dev)
1074 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1077 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1081 for (i = 0; i < dev->num_tx_queues; i++) {
1082 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1083 netif_tx_stop_queue(txq);
1087 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1089 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1093 * netif_queue_stopped - test if transmit queue is flowblocked
1094 * @dev: network device
1096 * Test if transmit queue on device is currently unable to send.
1098 static inline int netif_queue_stopped(const struct net_device *dev)
1100 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1103 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1105 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1109 * netif_running - test if up
1110 * @dev: network device
1112 * Test if the device has been brought up.
1114 static inline int netif_running(const struct net_device *dev)
1116 return test_bit(__LINK_STATE_START, &dev->state);
1120 * Routines to manage the subqueues on a device. We only need start
1121 * stop, and a check if it's stopped. All other device management is
1122 * done at the overall netdevice level.
1123 * Also test the device if we're multiqueue.
1127 * netif_start_subqueue - allow sending packets on subqueue
1128 * @dev: network device
1129 * @queue_index: sub queue index
1131 * Start individual transmit queue of a device with multiple transmit queues.
1133 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1135 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1136 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1140 * netif_stop_subqueue - stop sending packets on subqueue
1141 * @dev: network device
1142 * @queue_index: sub queue index
1144 * Stop individual transmit queue of a device with multiple transmit queues.
1146 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1148 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1149 #ifdef CONFIG_NETPOLL_TRAP
1153 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1157 * netif_subqueue_stopped - test status of subqueue
1158 * @dev: network device
1159 * @queue_index: sub queue index
1161 * Check individual transmit queue of a device with multiple transmit queues.
1163 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1166 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1167 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1170 static inline int netif_subqueue_stopped(const struct net_device *dev,
1171 struct sk_buff *skb)
1173 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1177 * netif_wake_subqueue - allow sending packets on subqueue
1178 * @dev: network device
1179 * @queue_index: sub queue index
1181 * Resume individual transmit queue of a device with multiple transmit queues.
1183 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1185 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1186 #ifdef CONFIG_NETPOLL_TRAP
1190 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1191 __netif_schedule(txq->qdisc);
1195 * netif_is_multiqueue - test if device has multiple transmit queues
1196 * @dev: network device
1198 * Check if device has multiple transmit queues
1200 static inline int netif_is_multiqueue(const struct net_device *dev)
1202 return (dev->num_tx_queues > 1);
1205 /* Use this variant when it is known for sure that it
1206 * is executing from hardware interrupt context or with hardware interrupts
1209 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1211 /* Use this variant in places where it could be invoked
1212 * from either hardware interrupt or other context, with hardware interrupts
1213 * either disabled or enabled.
1215 extern void dev_kfree_skb_any(struct sk_buff *skb);
1217 #define HAVE_NETIF_RX 1
1218 extern int netif_rx(struct sk_buff *skb);
1219 extern int netif_rx_ni(struct sk_buff *skb);
1220 #define HAVE_NETIF_RECEIVE_SKB 1
1221 extern int netif_receive_skb(struct sk_buff *skb);
1222 extern void netif_nit_deliver(struct sk_buff *skb);
1223 extern int dev_valid_name(const char *name);
1224 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1225 extern int dev_ethtool(struct net *net, struct ifreq *);
1226 extern unsigned dev_get_flags(const struct net_device *);
1227 extern int dev_change_flags(struct net_device *, unsigned);
1228 extern int dev_change_name(struct net_device *, const char *);
1229 extern int dev_set_alias(struct net_device *, const char *, size_t);
1230 extern int dev_change_net_namespace(struct net_device *,
1231 struct net *, const char *);
1232 extern int dev_set_mtu(struct net_device *, int);
1233 extern int dev_set_mac_address(struct net_device *,
1235 extern int dev_hard_start_xmit(struct sk_buff *skb,
1236 struct net_device *dev,
1237 struct netdev_queue *txq);
1239 extern int netdev_budget;
1241 /* Called by rtnetlink.c:rtnl_unlock() */
1242 extern void netdev_run_todo(void);
1245 * dev_put - release reference to device
1246 * @dev: network device
1248 * Release reference to device to allow it to be freed.
1250 static inline void dev_put(struct net_device *dev)
1252 atomic_dec(&dev->refcnt);
1256 * dev_hold - get reference to device
1257 * @dev: network device
1259 * Hold reference to device to keep it from being freed.
1261 static inline void dev_hold(struct net_device *dev)
1263 atomic_inc(&dev->refcnt);
1266 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1267 * and _off may be called from IRQ context, but it is caller
1268 * who is responsible for serialization of these calls.
1270 * The name carrier is inappropriate, these functions should really be
1271 * called netif_lowerlayer_*() because they represent the state of any
1272 * kind of lower layer not just hardware media.
1275 extern void linkwatch_fire_event(struct net_device *dev);
1278 * netif_carrier_ok - test if carrier present
1279 * @dev: network device
1281 * Check if carrier is present on device
1283 static inline int netif_carrier_ok(const struct net_device *dev)
1285 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1288 extern void __netdev_watchdog_up(struct net_device *dev);
1290 extern void netif_carrier_on(struct net_device *dev);
1292 extern void netif_carrier_off(struct net_device *dev);
1295 * netif_dormant_on - mark device as dormant.
1296 * @dev: network device
1298 * Mark device as dormant (as per RFC2863).
1300 * The dormant state indicates that the relevant interface is not
1301 * actually in a condition to pass packets (i.e., it is not 'up') but is
1302 * in a "pending" state, waiting for some external event. For "on-
1303 * demand" interfaces, this new state identifies the situation where the
1304 * interface is waiting for events to place it in the up state.
1307 static inline void netif_dormant_on(struct net_device *dev)
1309 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1310 linkwatch_fire_event(dev);
1314 * netif_dormant_off - set device as not dormant.
1315 * @dev: network device
1317 * Device is not in dormant state.
1319 static inline void netif_dormant_off(struct net_device *dev)
1321 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1322 linkwatch_fire_event(dev);
1326 * netif_dormant - test if carrier present
1327 * @dev: network device
1329 * Check if carrier is present on device
1331 static inline int netif_dormant(const struct net_device *dev)
1333 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1338 * netif_oper_up - test if device is operational
1339 * @dev: network device
1341 * Check if carrier is operational
1343 static inline int netif_oper_up(const struct net_device *dev) {
1344 return (dev->operstate == IF_OPER_UP ||
1345 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1349 * netif_device_present - is device available or removed
1350 * @dev: network device
1352 * Check if device has not been removed from system.
1354 static inline int netif_device_present(struct net_device *dev)
1356 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1359 extern void netif_device_detach(struct net_device *dev);
1361 extern void netif_device_attach(struct net_device *dev);
1364 * Network interface message level settings
1366 #define HAVE_NETIF_MSG 1
1369 NETIF_MSG_DRV = 0x0001,
1370 NETIF_MSG_PROBE = 0x0002,
1371 NETIF_MSG_LINK = 0x0004,
1372 NETIF_MSG_TIMER = 0x0008,
1373 NETIF_MSG_IFDOWN = 0x0010,
1374 NETIF_MSG_IFUP = 0x0020,
1375 NETIF_MSG_RX_ERR = 0x0040,
1376 NETIF_MSG_TX_ERR = 0x0080,
1377 NETIF_MSG_TX_QUEUED = 0x0100,
1378 NETIF_MSG_INTR = 0x0200,
1379 NETIF_MSG_TX_DONE = 0x0400,
1380 NETIF_MSG_RX_STATUS = 0x0800,
1381 NETIF_MSG_PKTDATA = 0x1000,
1382 NETIF_MSG_HW = 0x2000,
1383 NETIF_MSG_WOL = 0x4000,
1386 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1387 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1388 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1389 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1390 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1391 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1392 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1393 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1394 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1395 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1396 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1397 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1398 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1399 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1400 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1402 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1405 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1406 return default_msg_enable_bits;
1407 if (debug_value == 0) /* no output */
1409 /* set low N bits */
1410 return (1 << debug_value) - 1;
1413 /* Test if receive needs to be scheduled but only if up */
1414 static inline int netif_rx_schedule_prep(struct net_device *dev,
1415 struct napi_struct *napi)
1417 return napi_schedule_prep(napi);
1420 /* Add interface to tail of rx poll list. This assumes that _prep has
1421 * already been called and returned 1.
1423 static inline void __netif_rx_schedule(struct net_device *dev,
1424 struct napi_struct *napi)
1426 __napi_schedule(napi);
1429 /* Try to reschedule poll. Called by irq handler. */
1431 static inline void netif_rx_schedule(struct net_device *dev,
1432 struct napi_struct *napi)
1434 if (netif_rx_schedule_prep(dev, napi))
1435 __netif_rx_schedule(dev, napi);
1438 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1439 static inline int netif_rx_reschedule(struct net_device *dev,
1440 struct napi_struct *napi)
1442 if (napi_schedule_prep(napi)) {
1443 __netif_rx_schedule(dev, napi);
1449 /* same as netif_rx_complete, except that local_irq_save(flags)
1450 * has already been issued
1452 static inline void __netif_rx_complete(struct net_device *dev,
1453 struct napi_struct *napi)
1455 __napi_complete(napi);
1458 /* Remove interface from poll list: it must be in the poll list
1459 * on current cpu. This primitive is called by dev->poll(), when
1460 * it completes the work. The device cannot be out of poll list at this
1461 * moment, it is BUG().
1463 static inline void netif_rx_complete(struct net_device *dev,
1464 struct napi_struct *napi)
1466 unsigned long flags;
1468 local_irq_save(flags);
1469 __netif_rx_complete(dev, napi);
1470 local_irq_restore(flags);
1473 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1475 spin_lock(&txq->_xmit_lock);
1476 txq->xmit_lock_owner = cpu;
1479 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1481 spin_lock_bh(&txq->_xmit_lock);
1482 txq->xmit_lock_owner = smp_processor_id();
1485 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1487 int ok = spin_trylock(&txq->_xmit_lock);
1489 txq->xmit_lock_owner = smp_processor_id();
1493 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1495 txq->xmit_lock_owner = -1;
1496 spin_unlock(&txq->_xmit_lock);
1499 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1501 txq->xmit_lock_owner = -1;
1502 spin_unlock_bh(&txq->_xmit_lock);
1506 * netif_tx_lock - grab network device transmit lock
1507 * @dev: network device
1508 * @cpu: cpu number of lock owner
1510 * Get network device transmit lock
1512 static inline void netif_tx_lock(struct net_device *dev)
1517 spin_lock(&dev->tx_global_lock);
1518 cpu = smp_processor_id();
1519 for (i = 0; i < dev->num_tx_queues; i++) {
1520 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1522 /* We are the only thread of execution doing a
1523 * freeze, but we have to grab the _xmit_lock in
1524 * order to synchronize with threads which are in
1525 * the ->hard_start_xmit() handler and already
1526 * checked the frozen bit.
1528 __netif_tx_lock(txq, cpu);
1529 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1530 __netif_tx_unlock(txq);
1534 static inline void netif_tx_lock_bh(struct net_device *dev)
1540 static inline void netif_tx_unlock(struct net_device *dev)
1544 for (i = 0; i < dev->num_tx_queues; i++) {
1545 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1547 /* No need to grab the _xmit_lock here. If the
1548 * queue is not stopped for another reason, we
1551 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1552 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1553 __netif_schedule(txq->qdisc);
1555 spin_unlock(&dev->tx_global_lock);
1558 static inline void netif_tx_unlock_bh(struct net_device *dev)
1560 netif_tx_unlock(dev);
1564 #define HARD_TX_LOCK(dev, txq, cpu) { \
1565 if ((dev->features & NETIF_F_LLTX) == 0) { \
1566 __netif_tx_lock(txq, cpu); \
1570 #define HARD_TX_UNLOCK(dev, txq) { \
1571 if ((dev->features & NETIF_F_LLTX) == 0) { \
1572 __netif_tx_unlock(txq); \
1576 static inline void netif_tx_disable(struct net_device *dev)
1582 cpu = smp_processor_id();
1583 for (i = 0; i < dev->num_tx_queues; i++) {
1584 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1586 __netif_tx_lock(txq, cpu);
1587 netif_tx_stop_queue(txq);
1588 __netif_tx_unlock(txq);
1593 static inline void netif_addr_lock(struct net_device *dev)
1595 spin_lock(&dev->addr_list_lock);
1598 static inline void netif_addr_lock_bh(struct net_device *dev)
1600 spin_lock_bh(&dev->addr_list_lock);
1603 static inline void netif_addr_unlock(struct net_device *dev)
1605 spin_unlock(&dev->addr_list_lock);
1608 static inline void netif_addr_unlock_bh(struct net_device *dev)
1610 spin_unlock_bh(&dev->addr_list_lock);
1613 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1615 extern void ether_setup(struct net_device *dev);
1617 /* Support for loadable net-drivers */
1618 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1619 void (*setup)(struct net_device *),
1620 unsigned int queue_count);
1621 #define alloc_netdev(sizeof_priv, name, setup) \
1622 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1623 extern int register_netdev(struct net_device *dev);
1624 extern void unregister_netdev(struct net_device *dev);
1625 /* Functions used for secondary unicast and multicast support */
1626 extern void dev_set_rx_mode(struct net_device *dev);
1627 extern void __dev_set_rx_mode(struct net_device *dev);
1628 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1629 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1630 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1631 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1632 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1633 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1634 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1635 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1636 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1637 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1638 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1639 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1640 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1641 extern int dev_set_allmulti(struct net_device *dev, int inc);
1642 extern void netdev_state_change(struct net_device *dev);
1643 extern void netdev_bonding_change(struct net_device *dev);
1644 extern void netdev_features_change(struct net_device *dev);
1645 /* Load a device via the kmod */
1646 extern void dev_load(struct net *net, const char *name);
1647 extern void dev_mcast_init(void);
1648 extern int netdev_max_backlog;
1649 extern int weight_p;
1650 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1651 extern int skb_checksum_help(struct sk_buff *skb);
1652 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1654 extern void netdev_rx_csum_fault(struct net_device *dev);
1656 static inline void netdev_rx_csum_fault(struct net_device *dev)
1660 /* rx skb timestamps */
1661 extern void net_enable_timestamp(void);
1662 extern void net_disable_timestamp(void);
1664 #ifdef CONFIG_PROC_FS
1665 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1666 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1667 extern void dev_seq_stop(struct seq_file *seq, void *v);
1670 extern int netdev_class_create_file(struct class_attribute *class_attr);
1671 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1673 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1675 extern void linkwatch_run_queue(void);
1677 extern int netdev_compute_features(unsigned long all, unsigned long one);
1679 static inline int net_gso_ok(int features, int gso_type)
1681 int feature = gso_type << NETIF_F_GSO_SHIFT;
1682 return (features & feature) == feature;
1685 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1687 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1690 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1692 return skb_is_gso(skb) &&
1693 (!skb_gso_ok(skb, dev->features) ||
1694 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1697 static inline void netif_set_gso_max_size(struct net_device *dev,
1700 dev->gso_max_size = size;
1703 /* On bonding slaves other than the currently active slave, suppress
1704 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1705 * ARP on active-backup slaves with arp_validate enabled.
1707 static inline int skb_bond_should_drop(struct sk_buff *skb)
1709 struct net_device *dev = skb->dev;
1710 struct net_device *master = dev->master;
1713 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1714 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1715 skb->protocol == __constant_htons(ETH_P_ARP))
1718 if (master->priv_flags & IFF_MASTER_ALB) {
1719 if (skb->pkt_type != PACKET_BROADCAST &&
1720 skb->pkt_type != PACKET_MULTICAST)
1723 if (master->priv_flags & IFF_MASTER_8023AD &&
1724 skb->protocol == __constant_htons(ETH_P_SLOW))
1732 #endif /* __KERNEL__ */
1734 #endif /* _LINUX_DEV_H */