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_BYPASS 4 /* packet does not leave via dequeue;
65 (TC use only - dev_queue_xmit
66 returns this as NET_XMIT_SUCCESS) */
68 /* Backlog congestion levels */
69 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70 #define NET_RX_DROP 1 /* packet dropped */
71 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
72 #define NET_RX_CN_MOD 3 /* Storm on its way! */
73 #define NET_RX_CN_HIGH 4 /* The storm is here */
74 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
76 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
77 * indicates that the device will soon be dropping packets, or already drops
78 * some packets of the same priority; prompting us to send less aggressively. */
79 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
80 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
84 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
86 /* Driver transmit return codes */
87 #define NETDEV_TX_OK 0 /* driver took care of packet */
88 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
89 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
94 * Compute the worst case header length according to the protocols
98 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
99 # if defined(CONFIG_MAC80211_MESH)
100 # define LL_MAX_HEADER 128
102 # define LL_MAX_HEADER 96
104 #elif defined(CONFIG_TR)
105 # define LL_MAX_HEADER 48
107 # define LL_MAX_HEADER 32
110 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
111 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
112 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
113 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
114 #define MAX_HEADER LL_MAX_HEADER
116 #define MAX_HEADER (LL_MAX_HEADER + 48)
119 #endif /* __KERNEL__ */
121 struct net_device_subqueue
123 /* Give a control state for each queue. This struct may contain
124 * per-queue locks in the future.
130 * Network device statistics. Akin to the 2.0 ether stats but
131 * with byte counters.
134 struct net_device_stats
136 unsigned long rx_packets; /* total packets received */
137 unsigned long tx_packets; /* total packets transmitted */
138 unsigned long rx_bytes; /* total bytes received */
139 unsigned long tx_bytes; /* total bytes transmitted */
140 unsigned long rx_errors; /* bad packets received */
141 unsigned long tx_errors; /* packet transmit problems */
142 unsigned long rx_dropped; /* no space in linux buffers */
143 unsigned long tx_dropped; /* no space available in linux */
144 unsigned long multicast; /* multicast packets received */
145 unsigned long collisions;
147 /* detailed rx_errors: */
148 unsigned long rx_length_errors;
149 unsigned long rx_over_errors; /* receiver ring buff overflow */
150 unsigned long rx_crc_errors; /* recved pkt with crc error */
151 unsigned long rx_frame_errors; /* recv'd frame alignment error */
152 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
153 unsigned long rx_missed_errors; /* receiver missed packet */
155 /* detailed tx_errors */
156 unsigned long tx_aborted_errors;
157 unsigned long tx_carrier_errors;
158 unsigned long tx_fifo_errors;
159 unsigned long tx_heartbeat_errors;
160 unsigned long tx_window_errors;
163 unsigned long rx_compressed;
164 unsigned long tx_compressed;
168 /* Media selection options. */
181 #include <linux/cache.h>
182 #include <linux/skbuff.h>
188 struct netif_rx_stats
192 unsigned time_squeeze;
193 unsigned cpu_collision;
196 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
200 struct dev_addr_list *next;
201 u8 da_addr[MAX_ADDR_LEN];
209 * We tag multicasts with these structures.
212 #define dev_mc_list dev_addr_list
213 #define dmi_addr da_addr
214 #define dmi_addrlen da_addrlen
215 #define dmi_users da_users
216 #define dmi_gusers da_gusers
220 struct hh_cache *hh_next; /* Next entry */
221 atomic_t hh_refcnt; /* number of users */
223 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
225 * They are mostly read, but hh_refcnt may be changed quite frequently,
226 * incurring cache line ping pongs.
228 __be16 hh_type ____cacheline_aligned_in_smp;
229 /* protocol identifier, f.e ETH_P_IP
230 * NOTE: For VLANs, this will be the
231 * encapuslated type. --BLG
233 u16 hh_len; /* length of header */
234 int (*hh_output)(struct sk_buff *skb);
237 /* cached hardware header; allow for machine alignment needs. */
238 #define HH_DATA_MOD 16
239 #define HH_DATA_OFF(__len) \
240 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
241 #define HH_DATA_ALIGN(__len) \
242 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
243 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
246 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
248 * dev->hard_header_len ? (dev->hard_header_len +
249 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
251 * We could use other alignment values, but we must maintain the
252 * relationship HH alignment <= LL alignment.
254 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
257 #define LL_RESERVED_SPACE(dev) \
258 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
260 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
261 #define LL_ALLOCATED_SPACE(dev) \
262 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
265 int (*create) (struct sk_buff *skb, struct net_device *dev,
266 unsigned short type, const void *daddr,
267 const void *saddr, unsigned len);
268 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
269 int (*rebuild)(struct sk_buff *skb);
270 #define HAVE_HEADER_CACHE
271 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
272 void (*cache_update)(struct hh_cache *hh,
273 const struct net_device *dev,
274 const unsigned char *haddr);
277 /* These flag bits are private to the generic network queueing
278 * layer, they may not be explicitly referenced by any other
285 __LINK_STATE_PRESENT,
287 __LINK_STATE_NOCARRIER,
288 __LINK_STATE_LINKWATCH_PENDING,
289 __LINK_STATE_DORMANT,
294 * This structure holds at boot time configured netdevice settings. They
295 * are then used in the device probing.
297 struct netdev_boot_setup {
301 #define NETDEV_BOOT_SETUP_MAX 8
303 extern int __init netdev_boot_setup(char *str);
306 * Structure for NAPI scheduling similar to tasklet but with weighting
309 /* The poll_list must only be managed by the entity which
310 * changes the state of the NAPI_STATE_SCHED bit. This means
311 * whoever atomically sets that bit can add this napi_struct
312 * to the per-cpu poll_list, and whoever clears that bit
313 * can remove from the list right before clearing the bit.
315 struct list_head poll_list;
319 int (*poll)(struct napi_struct *, int);
320 #ifdef CONFIG_NETPOLL
321 spinlock_t poll_lock;
323 struct net_device *dev;
324 struct list_head dev_list;
330 NAPI_STATE_SCHED, /* Poll is scheduled */
331 NAPI_STATE_DISABLE, /* Disable pending */
334 extern void __napi_schedule(struct napi_struct *n);
336 static inline int napi_disable_pending(struct napi_struct *n)
338 return test_bit(NAPI_STATE_DISABLE, &n->state);
342 * napi_schedule_prep - check if napi can be scheduled
345 * Test if NAPI routine is already running, and if not mark
346 * it as running. This is used as a condition variable
347 * insure only one NAPI poll instance runs. We also make
348 * sure there is no pending NAPI disable.
350 static inline int napi_schedule_prep(struct napi_struct *n)
352 return !napi_disable_pending(n) &&
353 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
357 * napi_schedule - schedule NAPI poll
360 * Schedule NAPI poll routine to be called if it is not already
363 static inline void napi_schedule(struct napi_struct *n)
365 if (napi_schedule_prep(n))
369 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
370 static inline int napi_reschedule(struct napi_struct *napi)
372 if (napi_schedule_prep(napi)) {
373 __napi_schedule(napi);
380 * napi_complete - NAPI processing complete
383 * Mark NAPI processing as complete.
385 static inline void __napi_complete(struct napi_struct *n)
387 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
388 list_del(&n->poll_list);
389 smp_mb__before_clear_bit();
390 clear_bit(NAPI_STATE_SCHED, &n->state);
393 static inline void napi_complete(struct napi_struct *n)
397 local_irq_save(flags);
399 local_irq_restore(flags);
403 * napi_disable - prevent NAPI from scheduling
406 * Stop NAPI from being scheduled on this context.
407 * Waits till any outstanding processing completes.
409 static inline void napi_disable(struct napi_struct *n)
411 set_bit(NAPI_STATE_DISABLE, &n->state);
412 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
414 clear_bit(NAPI_STATE_DISABLE, &n->state);
418 * napi_enable - enable NAPI scheduling
421 * Resume NAPI from being scheduled on this context.
422 * Must be paired with napi_disable.
424 static inline void napi_enable(struct napi_struct *n)
426 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
427 smp_mb__before_clear_bit();
428 clear_bit(NAPI_STATE_SCHED, &n->state);
433 * napi_synchronize - wait until NAPI is not running
436 * Wait until NAPI is done being scheduled on this context.
437 * Waits till any outstanding processing completes but
438 * does not disable future activations.
440 static inline void napi_synchronize(const struct napi_struct *n)
442 while (test_bit(NAPI_STATE_SCHED, &n->state))
446 # define napi_synchronize(n) barrier()
449 enum netdev_queue_state_t
452 __QUEUE_STATE_QDISC_RUNNING,
455 struct netdev_queue {
457 struct net_device *dev;
460 struct sk_buff *gso_skb;
461 spinlock_t _xmit_lock;
463 struct Qdisc *qdisc_sleeping;
464 struct list_head qdisc_list;
465 struct netdev_queue *next_sched;
466 } ____cacheline_aligned_in_smp;
469 * The DEVICE structure.
470 * Actually, this whole structure is a big mistake. It mixes I/O
471 * data with strictly "high-level" data, and it has to know about
472 * almost every data structure used in the INET module.
474 * FIXME: cleanup struct net_device such that network protocol info
482 * This is the first field of the "visible" part of this structure
483 * (i.e. as seen by users in the "Space.c" file). It is the name
487 /* device name hash chain */
488 struct hlist_node name_hlist;
491 * I/O specific fields
492 * FIXME: Merge these and struct ifmap into one
494 unsigned long mem_end; /* shared mem end */
495 unsigned long mem_start; /* shared mem start */
496 unsigned long base_addr; /* device I/O address */
497 unsigned int irq; /* device IRQ number */
500 * Some hardware also needs these fields, but they are not
501 * part of the usual set specified in Space.c.
504 unsigned char if_port; /* Selectable AUI, TP,..*/
505 unsigned char dma; /* DMA channel */
509 struct list_head dev_list;
510 #ifdef CONFIG_NETPOLL
511 struct list_head napi_list;
514 /* The device initialization function. Called only once. */
515 int (*init)(struct net_device *dev);
517 /* ------- Fields preinitialized in Space.c finish here ------- */
519 /* Net device features */
520 unsigned long features;
521 #define NETIF_F_SG 1 /* Scatter/gather IO. */
522 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
523 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
524 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
525 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
526 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
527 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
528 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
529 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
530 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
531 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
532 #define NETIF_F_GSO 2048 /* Enable software GSO. */
533 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
534 /* do not use LLTX in new drivers */
535 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
536 #define NETIF_F_LRO 32768 /* large receive offload */
538 /* Segmentation offload features */
539 #define NETIF_F_GSO_SHIFT 16
540 #define NETIF_F_GSO_MASK 0xffff0000
541 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
542 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
543 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
544 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
545 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
547 /* List of features with software fallbacks. */
548 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
551 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
552 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
553 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
554 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
556 /* Interface index. Unique device identifier */
561 struct net_device_stats* (*get_stats)(struct net_device *dev);
562 struct net_device_stats stats;
564 #ifdef CONFIG_WIRELESS_EXT
565 /* List of functions to handle Wireless Extensions (instead of ioctl).
566 * See <net/iw_handler.h> for details. Jean II */
567 const struct iw_handler_def * wireless_handlers;
568 /* Instance data managed by the core of Wireless Extensions. */
569 struct iw_public_data * wireless_data;
571 const struct ethtool_ops *ethtool_ops;
573 /* Hardware header description */
574 const struct header_ops *header_ops;
577 * This marks the end of the "visible" part of the structure. All
578 * fields hereafter are internal to the system, and may change at
579 * will (read: may be cleaned up at will).
583 unsigned int flags; /* interface flags (a la BSD) */
584 unsigned short gflags;
585 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
586 unsigned short padded; /* How much padding added by alloc_netdev() */
588 unsigned char operstate; /* RFC2863 operstate */
589 unsigned char link_mode; /* mapping policy to operstate */
591 unsigned mtu; /* interface MTU value */
592 unsigned short type; /* interface hardware type */
593 unsigned short hard_header_len; /* hardware hdr length */
595 /* extra head- and tailroom the hardware may need, but not in all cases
596 * can this be guaranteed, especially tailroom. Some cases also use
597 * LL_MAX_HEADER instead to allocate the skb.
599 unsigned short needed_headroom;
600 unsigned short needed_tailroom;
602 struct net_device *master; /* Pointer to master device of a group,
603 * which this device is member of.
606 /* Interface address info. */
607 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
608 unsigned char addr_len; /* hardware address length */
609 unsigned short dev_id; /* for shared network cards */
611 spinlock_t addr_list_lock;
612 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
613 int uc_count; /* Number of installed ucasts */
615 struct dev_addr_list *mc_list; /* Multicast mac addresses */
616 int mc_count; /* Number of installed mcasts */
617 unsigned int promiscuity;
618 unsigned int allmulti;
621 /* Protocol specific pointers */
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 */
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);
736 /* Network namespace this network device is inside */
740 /* mid-layer private */
744 struct net_bridge_port *br_port;
746 struct macvlan_port *macvlan_port;
748 struct garp_port *garp_port;
750 /* class/net/name entry */
752 /* space for optional statistics and wireless sysfs groups */
753 struct attribute_group *sysfs_groups[3];
755 /* rtnetlink link ops */
756 const struct rtnl_link_ops *rtnl_link_ops;
758 /* VLAN feature mask */
759 unsigned long vlan_features;
761 /* for setting kernel sock attribute on TCP connection setup */
762 #define GSO_MAX_SIZE 65536
763 unsigned int gso_max_size;
765 /* The TX queue control structures */
766 unsigned int egress_subqueue_count;
767 struct net_device_subqueue egress_subqueue[1];
769 #define to_net_dev(d) container_of(d, struct net_device, dev)
771 #define NETDEV_ALIGN 32
772 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
775 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
778 return &dev->_tx[index];
781 static inline void netdev_for_each_tx_queue(struct net_device *dev,
782 void (*f)(struct net_device *,
783 struct netdev_queue *,
789 for (i = 0; i < dev->num_tx_queues; i++)
790 f(dev, &dev->_tx[i], arg);
794 * Net namespace inlines
797 struct net *dev_net(const struct net_device *dev)
807 void dev_net_set(struct net_device *dev, struct net *net)
810 release_net(dev->nd_net);
811 dev->nd_net = hold_net(net);
816 * netdev_priv - access network device private data
817 * @dev: network device
819 * Get network device private data
821 static inline void *netdev_priv(const struct net_device *dev)
826 /* Set the sysfs physical device reference for the network logical device
827 * if set prior to registration will cause a symlink during initialization.
829 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
832 * netif_napi_add - initialize a napi context
833 * @dev: network device
834 * @napi: napi context
835 * @poll: polling function
836 * @weight: default weight
838 * netif_napi_add() must be used to initialize a napi context prior to calling
839 * *any* of the other napi related functions.
841 static inline void netif_napi_add(struct net_device *dev,
842 struct napi_struct *napi,
843 int (*poll)(struct napi_struct *, int),
846 INIT_LIST_HEAD(&napi->poll_list);
848 napi->weight = weight;
849 #ifdef CONFIG_NETPOLL
851 list_add(&napi->dev_list, &dev->napi_list);
852 spin_lock_init(&napi->poll_lock);
853 napi->poll_owner = -1;
855 set_bit(NAPI_STATE_SCHED, &napi->state);
859 * netif_napi_del - remove a napi context
860 * @napi: napi context
862 * netif_napi_del() removes a napi context from the network device napi list
864 static inline void netif_napi_del(struct napi_struct *napi)
866 #ifdef CONFIG_NETPOLL
867 list_del(&napi->dev_list);
872 __be16 type; /* This is really htons(ether_type). */
873 struct net_device *dev; /* NULL is wildcarded here */
874 int (*func) (struct sk_buff *,
876 struct packet_type *,
877 struct net_device *);
878 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
880 int (*gso_send_check)(struct sk_buff *skb);
881 void *af_packet_priv;
882 struct list_head list;
885 #include <linux/interrupt.h>
886 #include <linux/notifier.h>
888 extern rwlock_t dev_base_lock; /* Device list lock */
891 #define for_each_netdev(net, d) \
892 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
893 #define for_each_netdev_safe(net, d, n) \
894 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
895 #define for_each_netdev_continue(net, d) \
896 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
897 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
899 static inline struct net_device *next_net_device(struct net_device *dev)
901 struct list_head *lh;
905 lh = dev->dev_list.next;
906 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
909 static inline struct net_device *first_net_device(struct net *net)
911 return list_empty(&net->dev_base_head) ? NULL :
912 net_device_entry(net->dev_base_head.next);
915 extern int netdev_boot_setup_check(struct net_device *dev);
916 extern unsigned long netdev_boot_base(const char *prefix, int unit);
917 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
918 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
919 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
920 extern void dev_add_pack(struct packet_type *pt);
921 extern void dev_remove_pack(struct packet_type *pt);
922 extern void __dev_remove_pack(struct packet_type *pt);
924 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
925 unsigned short mask);
926 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
927 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
928 extern int dev_alloc_name(struct net_device *dev, const char *name);
929 extern int dev_open(struct net_device *dev);
930 extern int dev_close(struct net_device *dev);
931 extern void dev_disable_lro(struct net_device *dev);
932 extern int dev_queue_xmit(struct sk_buff *skb);
933 extern int register_netdevice(struct net_device *dev);
934 extern void unregister_netdevice(struct net_device *dev);
935 extern void free_netdev(struct net_device *dev);
936 extern void synchronize_net(void);
937 extern int register_netdevice_notifier(struct notifier_block *nb);
938 extern int unregister_netdevice_notifier(struct notifier_block *nb);
939 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
940 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
941 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
942 extern int dev_restart(struct net_device *dev);
943 #ifdef CONFIG_NETPOLL_TRAP
944 extern int netpoll_trap(void);
947 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
949 const void *daddr, const void *saddr,
952 if (!dev->header_ops || !dev->header_ops->create)
955 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
958 static inline int dev_parse_header(const struct sk_buff *skb,
959 unsigned char *haddr)
961 const struct net_device *dev = skb->dev;
963 if (!dev->header_ops || !dev->header_ops->parse)
965 return dev->header_ops->parse(skb, haddr);
968 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
969 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
970 static inline int unregister_gifconf(unsigned int family)
972 return register_gifconf(family, NULL);
976 * Incoming packets are placed on per-cpu queues so that
977 * no locking is needed.
981 struct netdev_queue *output_queue;
982 struct sk_buff_head input_pkt_queue;
983 struct list_head poll_list;
984 struct sk_buff *completion_queue;
986 struct napi_struct backlog;
987 #ifdef CONFIG_NET_DMA
988 struct dma_chan *net_dma;
992 DECLARE_PER_CPU(struct softnet_data,softnet_data);
994 #define HAVE_NETIF_QUEUE
996 extern void __netif_schedule(struct netdev_queue *txq);
998 static inline void netif_schedule_queue(struct netdev_queue *txq)
1000 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1001 __netif_schedule(txq);
1004 static inline void netif_schedule(struct net_device *dev)
1006 netif_schedule_queue(netdev_get_tx_queue(dev, 0));
1009 static inline void netif_tx_schedule_all(struct net_device *dev)
1013 for (i = 0; i < dev->num_tx_queues; i++)
1014 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1018 * netif_start_queue - allow transmit
1019 * @dev: network device
1021 * Allow upper layers to call the device hard_start_xmit routine.
1023 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1025 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1028 static inline void netif_start_queue(struct net_device *dev)
1030 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1033 static inline void netif_tx_start_all_queues(struct net_device *dev)
1037 for (i = 0; i < dev->num_tx_queues; i++) {
1038 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1039 netif_tx_start_queue(txq);
1044 * netif_wake_queue - restart transmit
1045 * @dev: network device
1047 * Allow upper layers to call the device hard_start_xmit routine.
1048 * Used for flow control when transmit resources are available.
1050 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1052 #ifdef CONFIG_NETPOLL_TRAP
1053 if (netpoll_trap()) {
1054 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1058 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1059 __netif_schedule(dev_queue);
1062 static inline void netif_wake_queue(struct net_device *dev)
1064 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1067 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1071 for (i = 0; i < dev->num_tx_queues; i++) {
1072 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1073 netif_tx_wake_queue(txq);
1078 * netif_stop_queue - stop transmitted packets
1079 * @dev: network device
1081 * Stop upper layers calling the device hard_start_xmit routine.
1082 * Used for flow control when transmit resources are unavailable.
1084 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1086 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1089 static inline void netif_stop_queue(struct net_device *dev)
1091 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1094 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1098 for (i = 0; i < dev->num_tx_queues; i++) {
1099 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1100 netif_tx_stop_queue(txq);
1105 * netif_queue_stopped - test if transmit queue is flowblocked
1106 * @dev: network device
1108 * Test if transmit queue on device is currently unable to send.
1110 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1112 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1115 static inline int netif_queue_stopped(const struct net_device *dev)
1117 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1121 * netif_running - test if up
1122 * @dev: network device
1124 * Test if the device has been brought up.
1126 static inline int netif_running(const struct net_device *dev)
1128 return test_bit(__LINK_STATE_START, &dev->state);
1132 * Routines to manage the subqueues on a device. We only need start
1133 * stop, and a check if it's stopped. All other device management is
1134 * done at the overall netdevice level.
1135 * Also test the device if we're multiqueue.
1139 * netif_start_subqueue - allow sending packets on subqueue
1140 * @dev: network device
1141 * @queue_index: sub queue index
1143 * Start individual transmit queue of a device with multiple transmit queues.
1145 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1147 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1148 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1152 * netif_stop_subqueue - stop sending packets on subqueue
1153 * @dev: network device
1154 * @queue_index: sub queue index
1156 * Stop individual transmit queue of a device with multiple transmit queues.
1158 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1160 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1161 #ifdef CONFIG_NETPOLL_TRAP
1165 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1169 * netif_subqueue_stopped - test status of subqueue
1170 * @dev: network device
1171 * @queue_index: sub queue index
1173 * Check individual transmit queue of a device with multiple transmit queues.
1175 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1178 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1179 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1182 static inline int netif_subqueue_stopped(const struct net_device *dev,
1183 struct sk_buff *skb)
1185 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1189 * netif_wake_subqueue - allow sending packets on subqueue
1190 * @dev: network device
1191 * @queue_index: sub queue index
1193 * Resume individual transmit queue of a device with multiple transmit queues.
1195 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1197 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1198 #ifdef CONFIG_NETPOLL_TRAP
1202 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1203 __netif_schedule(txq);
1207 * netif_is_multiqueue - test if device has multiple transmit queues
1208 * @dev: network device
1210 * Check if device has multiple transmit queues
1212 static inline int netif_is_multiqueue(const struct net_device *dev)
1214 return (dev->num_tx_queues > 1);
1217 /* Use this variant when it is known for sure that it
1218 * is executing from hardware interrupt context or with hardware interrupts
1221 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1223 /* Use this variant in places where it could be invoked
1224 * from either hardware interrupt or other context, with hardware interrupts
1225 * either disabled or enabled.
1227 extern void dev_kfree_skb_any(struct sk_buff *skb);
1229 #define HAVE_NETIF_RX 1
1230 extern int netif_rx(struct sk_buff *skb);
1231 extern int netif_rx_ni(struct sk_buff *skb);
1232 #define HAVE_NETIF_RECEIVE_SKB 1
1233 extern int netif_receive_skb(struct sk_buff *skb);
1234 extern void netif_nit_deliver(struct sk_buff *skb);
1235 extern int dev_valid_name(const char *name);
1236 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1237 extern int dev_ethtool(struct net *net, struct ifreq *);
1238 extern unsigned dev_get_flags(const struct net_device *);
1239 extern int dev_change_flags(struct net_device *, unsigned);
1240 extern int dev_change_name(struct net_device *, char *);
1241 extern int dev_change_net_namespace(struct net_device *,
1242 struct net *, const char *);
1243 extern int dev_set_mtu(struct net_device *, int);
1244 extern int dev_set_mac_address(struct net_device *,
1246 extern int dev_hard_start_xmit(struct sk_buff *skb,
1247 struct net_device *dev,
1248 struct netdev_queue *txq);
1250 extern int netdev_budget;
1252 /* Called by rtnetlink.c:rtnl_unlock() */
1253 extern void netdev_run_todo(void);
1256 * dev_put - release reference to device
1257 * @dev: network device
1259 * Release reference to device to allow it to be freed.
1261 static inline void dev_put(struct net_device *dev)
1263 atomic_dec(&dev->refcnt);
1267 * dev_hold - get reference to device
1268 * @dev: network device
1270 * Hold reference to device to keep it from being freed.
1272 static inline void dev_hold(struct net_device *dev)
1274 atomic_inc(&dev->refcnt);
1277 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1278 * and _off may be called from IRQ context, but it is caller
1279 * who is responsible for serialization of these calls.
1281 * The name carrier is inappropriate, these functions should really be
1282 * called netif_lowerlayer_*() because they represent the state of any
1283 * kind of lower layer not just hardware media.
1286 extern void linkwatch_fire_event(struct net_device *dev);
1289 * netif_carrier_ok - test if carrier present
1290 * @dev: network device
1292 * Check if carrier is present on device
1294 static inline int netif_carrier_ok(const struct net_device *dev)
1296 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1299 extern void __netdev_watchdog_up(struct net_device *dev);
1301 extern void netif_carrier_on(struct net_device *dev);
1303 extern void netif_carrier_off(struct net_device *dev);
1306 * netif_dormant_on - mark device as dormant.
1307 * @dev: network device
1309 * Mark device as dormant (as per RFC2863).
1311 * The dormant state indicates that the relevant interface is not
1312 * actually in a condition to pass packets (i.e., it is not 'up') but is
1313 * in a "pending" state, waiting for some external event. For "on-
1314 * demand" interfaces, this new state identifies the situation where the
1315 * interface is waiting for events to place it in the up state.
1318 static inline void netif_dormant_on(struct net_device *dev)
1320 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1321 linkwatch_fire_event(dev);
1325 * netif_dormant_off - set device as not dormant.
1326 * @dev: network device
1328 * Device is not in dormant state.
1330 static inline void netif_dormant_off(struct net_device *dev)
1332 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1333 linkwatch_fire_event(dev);
1337 * netif_dormant - test if carrier present
1338 * @dev: network device
1340 * Check if carrier is present on device
1342 static inline int netif_dormant(const struct net_device *dev)
1344 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1349 * netif_oper_up - test if device is operational
1350 * @dev: network device
1352 * Check if carrier is operational
1354 static inline int netif_oper_up(const struct net_device *dev) {
1355 return (dev->operstate == IF_OPER_UP ||
1356 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1360 * netif_device_present - is device available or removed
1361 * @dev: network device
1363 * Check if device has not been removed from system.
1365 static inline int netif_device_present(struct net_device *dev)
1367 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1370 extern void netif_device_detach(struct net_device *dev);
1372 extern void netif_device_attach(struct net_device *dev);
1375 * Network interface message level settings
1377 #define HAVE_NETIF_MSG 1
1380 NETIF_MSG_DRV = 0x0001,
1381 NETIF_MSG_PROBE = 0x0002,
1382 NETIF_MSG_LINK = 0x0004,
1383 NETIF_MSG_TIMER = 0x0008,
1384 NETIF_MSG_IFDOWN = 0x0010,
1385 NETIF_MSG_IFUP = 0x0020,
1386 NETIF_MSG_RX_ERR = 0x0040,
1387 NETIF_MSG_TX_ERR = 0x0080,
1388 NETIF_MSG_TX_QUEUED = 0x0100,
1389 NETIF_MSG_INTR = 0x0200,
1390 NETIF_MSG_TX_DONE = 0x0400,
1391 NETIF_MSG_RX_STATUS = 0x0800,
1392 NETIF_MSG_PKTDATA = 0x1000,
1393 NETIF_MSG_HW = 0x2000,
1394 NETIF_MSG_WOL = 0x4000,
1397 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1398 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1399 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1400 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1401 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1402 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1403 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1404 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1405 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1406 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1407 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1408 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1409 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1410 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1411 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1413 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1416 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1417 return default_msg_enable_bits;
1418 if (debug_value == 0) /* no output */
1420 /* set low N bits */
1421 return (1 << debug_value) - 1;
1424 /* Test if receive needs to be scheduled but only if up */
1425 static inline int netif_rx_schedule_prep(struct net_device *dev,
1426 struct napi_struct *napi)
1428 return napi_schedule_prep(napi);
1431 /* Add interface to tail of rx poll list. This assumes that _prep has
1432 * already been called and returned 1.
1434 static inline void __netif_rx_schedule(struct net_device *dev,
1435 struct napi_struct *napi)
1437 __napi_schedule(napi);
1440 /* Try to reschedule poll. Called by irq handler. */
1442 static inline void netif_rx_schedule(struct net_device *dev,
1443 struct napi_struct *napi)
1445 if (netif_rx_schedule_prep(dev, napi))
1446 __netif_rx_schedule(dev, napi);
1449 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1450 static inline int netif_rx_reschedule(struct net_device *dev,
1451 struct napi_struct *napi)
1453 if (napi_schedule_prep(napi)) {
1454 __netif_rx_schedule(dev, napi);
1460 /* same as netif_rx_complete, except that local_irq_save(flags)
1461 * has already been issued
1463 static inline void __netif_rx_complete(struct net_device *dev,
1464 struct napi_struct *napi)
1466 __napi_complete(napi);
1469 /* Remove interface from poll list: it must be in the poll list
1470 * on current cpu. This primitive is called by dev->poll(), when
1471 * it completes the work. The device cannot be out of poll list at this
1472 * moment, it is BUG().
1474 static inline void netif_rx_complete(struct net_device *dev,
1475 struct napi_struct *napi)
1477 unsigned long flags;
1479 local_irq_save(flags);
1480 __netif_rx_complete(dev, napi);
1481 local_irq_restore(flags);
1485 * netif_tx_lock - grab network device transmit lock
1486 * @dev: network device
1487 * @cpu: cpu number of lock owner
1489 * Get network device transmit lock
1491 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1493 spin_lock(&txq->_xmit_lock);
1494 txq->xmit_lock_owner = cpu;
1497 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1499 spin_lock_bh(&txq->_xmit_lock);
1500 txq->xmit_lock_owner = smp_processor_id();
1503 static inline void netif_tx_lock(struct net_device *dev)
1505 int cpu = smp_processor_id();
1508 for (i = 0; i < dev->num_tx_queues; i++) {
1509 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1510 __netif_tx_lock(txq, cpu);
1514 static inline void netif_tx_lock_bh(struct net_device *dev)
1520 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1522 int ok = spin_trylock(&txq->_xmit_lock);
1524 txq->xmit_lock_owner = smp_processor_id();
1528 static inline int netif_tx_trylock(struct net_device *dev)
1530 return __netif_tx_trylock(netdev_get_tx_queue(dev, 0));
1533 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1535 txq->xmit_lock_owner = -1;
1536 spin_unlock(&txq->_xmit_lock);
1539 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1541 txq->xmit_lock_owner = -1;
1542 spin_unlock_bh(&txq->_xmit_lock);
1545 static inline void netif_tx_unlock(struct net_device *dev)
1549 for (i = 0; i < dev->num_tx_queues; i++) {
1550 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1551 __netif_tx_unlock(txq);
1556 static inline void netif_tx_unlock_bh(struct net_device *dev)
1558 netif_tx_unlock(dev);
1562 #define HARD_TX_LOCK(dev, txq, cpu) { \
1563 if ((dev->features & NETIF_F_LLTX) == 0) { \
1564 __netif_tx_lock(txq, cpu); \
1568 #define HARD_TX_UNLOCK(dev, txq) { \
1569 if ((dev->features & NETIF_F_LLTX) == 0) { \
1570 __netif_tx_unlock(txq); \
1574 static inline void netif_tx_disable(struct net_device *dev)
1578 netif_tx_lock_bh(dev);
1579 for (i = 0; i < dev->num_tx_queues; i++) {
1580 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1581 netif_tx_stop_queue(txq);
1583 netif_tx_unlock_bh(dev);
1586 static inline void netif_addr_lock(struct net_device *dev)
1588 spin_lock(&dev->addr_list_lock);
1591 static inline void netif_addr_lock_bh(struct net_device *dev)
1593 spin_lock_bh(&dev->addr_list_lock);
1596 static inline void netif_addr_unlock(struct net_device *dev)
1598 spin_unlock(&dev->addr_list_lock);
1601 static inline void netif_addr_unlock_bh(struct net_device *dev)
1603 spin_unlock_bh(&dev->addr_list_lock);
1606 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1608 extern void ether_setup(struct net_device *dev);
1610 /* Support for loadable net-drivers */
1611 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1612 void (*setup)(struct net_device *),
1613 unsigned int queue_count);
1614 #define alloc_netdev(sizeof_priv, name, setup) \
1615 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1616 extern int register_netdev(struct net_device *dev);
1617 extern void unregister_netdev(struct net_device *dev);
1618 /* Functions used for secondary unicast and multicast support */
1619 extern void dev_set_rx_mode(struct net_device *dev);
1620 extern void __dev_set_rx_mode(struct net_device *dev);
1621 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1622 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1623 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1624 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1625 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1626 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1627 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1628 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1629 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1630 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1631 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1632 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1633 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1634 extern int dev_set_allmulti(struct net_device *dev, int inc);
1635 extern void netdev_state_change(struct net_device *dev);
1636 extern void netdev_bonding_change(struct net_device *dev);
1637 extern void netdev_features_change(struct net_device *dev);
1638 /* Load a device via the kmod */
1639 extern void dev_load(struct net *net, const char *name);
1640 extern void dev_mcast_init(void);
1641 extern int netdev_max_backlog;
1642 extern int weight_p;
1643 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1644 extern int skb_checksum_help(struct sk_buff *skb);
1645 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1647 extern void netdev_rx_csum_fault(struct net_device *dev);
1649 static inline void netdev_rx_csum_fault(struct net_device *dev)
1653 /* rx skb timestamps */
1654 extern void net_enable_timestamp(void);
1655 extern void net_disable_timestamp(void);
1657 #ifdef CONFIG_PROC_FS
1658 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1659 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1660 extern void dev_seq_stop(struct seq_file *seq, void *v);
1663 extern int netdev_class_create_file(struct class_attribute *class_attr);
1664 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1666 extern void linkwatch_run_queue(void);
1668 extern int netdev_compute_features(unsigned long all, unsigned long one);
1670 static inline int net_gso_ok(int features, int gso_type)
1672 int feature = gso_type << NETIF_F_GSO_SHIFT;
1673 return (features & feature) == feature;
1676 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1678 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1681 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1683 return skb_is_gso(skb) &&
1684 (!skb_gso_ok(skb, dev->features) ||
1685 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1688 static inline void netif_set_gso_max_size(struct net_device *dev,
1691 dev->gso_max_size = size;
1694 /* On bonding slaves other than the currently active slave, suppress
1695 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1696 * ARP on active-backup slaves with arp_validate enabled.
1698 static inline int skb_bond_should_drop(struct sk_buff *skb)
1700 struct net_device *dev = skb->dev;
1701 struct net_device *master = dev->master;
1704 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1705 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1706 skb->protocol == __constant_htons(ETH_P_ARP))
1709 if (master->priv_flags & IFF_MASTER_ALB) {
1710 if (skb->pkt_type != PACKET_BROADCAST &&
1711 skb->pkt_type != PACKET_MULTICAST)
1714 if (master->priv_flags & IFF_MASTER_8023AD &&
1715 skb->protocol == __constant_htons(ETH_P_SLOW))
1723 #endif /* __KERNEL__ */
1725 #endif /* _LINUX_DEV_H */