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>
52 /* source back-compat hooks */
53 #define SET_ETHTOOL_OPS(netdev,ops) \
54 ( (netdev)->ethtool_ops = (ops) )
56 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
57 functions are available. */
58 #define HAVE_FREE_NETDEV /* free_netdev() */
59 #define HAVE_NETDEV_PRIV /* netdev_priv() */
61 #define NET_XMIT_SUCCESS 0
62 #define NET_XMIT_DROP 1 /* skb dropped */
63 #define NET_XMIT_CN 2 /* congestion notification */
64 #define NET_XMIT_POLICED 3 /* skb is shot by police */
65 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
67 /* Backlog congestion levels */
68 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
69 #define NET_RX_DROP 1 /* packet dropped */
70 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
71 #define NET_RX_CN_MOD 3 /* Storm on its way! */
72 #define NET_RX_CN_HIGH 4 /* The storm is here */
73 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
75 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
76 * indicates that the device will soon be dropping packets, or already drops
77 * some packets of the same priority; prompting us to send less aggressively. */
78 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
79 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
83 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
85 /* Driver transmit return codes */
86 #define NETDEV_TX_OK 0 /* driver took care of packet */
87 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
88 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
93 * Compute the worst case header length according to the protocols
97 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
98 # if defined(CONFIG_MAC80211_MESH)
99 # define LL_MAX_HEADER 128
101 # define LL_MAX_HEADER 96
103 #elif defined(CONFIG_TR)
104 # define LL_MAX_HEADER 48
106 # define LL_MAX_HEADER 32
109 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
110 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
111 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
112 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
113 #define MAX_HEADER LL_MAX_HEADER
115 #define MAX_HEADER (LL_MAX_HEADER + 48)
118 #endif /* __KERNEL__ */
121 * Network device statistics. Akin to the 2.0 ether stats but
122 * with byte counters.
125 struct net_device_stats
127 unsigned long rx_packets; /* total packets received */
128 unsigned long tx_packets; /* total packets transmitted */
129 unsigned long rx_bytes; /* total bytes received */
130 unsigned long tx_bytes; /* total bytes transmitted */
131 unsigned long rx_errors; /* bad packets received */
132 unsigned long tx_errors; /* packet transmit problems */
133 unsigned long rx_dropped; /* no space in linux buffers */
134 unsigned long tx_dropped; /* no space available in linux */
135 unsigned long multicast; /* multicast packets received */
136 unsigned long collisions;
138 /* detailed rx_errors: */
139 unsigned long rx_length_errors;
140 unsigned long rx_over_errors; /* receiver ring buff overflow */
141 unsigned long rx_crc_errors; /* recved pkt with crc error */
142 unsigned long rx_frame_errors; /* recv'd frame alignment error */
143 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
144 unsigned long rx_missed_errors; /* receiver missed packet */
146 /* detailed tx_errors */
147 unsigned long tx_aborted_errors;
148 unsigned long tx_carrier_errors;
149 unsigned long tx_fifo_errors;
150 unsigned long tx_heartbeat_errors;
151 unsigned long tx_window_errors;
154 unsigned long rx_compressed;
155 unsigned long tx_compressed;
159 /* Media selection options. */
172 #include <linux/cache.h>
173 #include <linux/skbuff.h>
179 struct netif_rx_stats
183 unsigned time_squeeze;
184 unsigned cpu_collision;
187 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
191 struct dev_addr_list *next;
192 u8 da_addr[MAX_ADDR_LEN];
200 * We tag multicasts with these structures.
203 #define dev_mc_list dev_addr_list
204 #define dmi_addr da_addr
205 #define dmi_addrlen da_addrlen
206 #define dmi_users da_users
207 #define dmi_gusers da_gusers
211 struct hh_cache *hh_next; /* Next entry */
212 atomic_t hh_refcnt; /* number of users */
214 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
216 * They are mostly read, but hh_refcnt may be changed quite frequently,
217 * incurring cache line ping pongs.
219 __be16 hh_type ____cacheline_aligned_in_smp;
220 /* protocol identifier, f.e ETH_P_IP
221 * NOTE: For VLANs, this will be the
222 * encapuslated type. --BLG
224 u16 hh_len; /* length of header */
225 int (*hh_output)(struct sk_buff *skb);
228 /* cached hardware header; allow for machine alignment needs. */
229 #define HH_DATA_MOD 16
230 #define HH_DATA_OFF(__len) \
231 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
232 #define HH_DATA_ALIGN(__len) \
233 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
234 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
237 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
239 * dev->hard_header_len ? (dev->hard_header_len +
240 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
242 * We could use other alignment values, but we must maintain the
243 * relationship HH alignment <= LL alignment.
245 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
248 #define LL_RESERVED_SPACE(dev) \
249 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
250 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
251 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
252 #define LL_ALLOCATED_SPACE(dev) \
253 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
256 int (*create) (struct sk_buff *skb, struct net_device *dev,
257 unsigned short type, const void *daddr,
258 const void *saddr, unsigned len);
259 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
260 int (*rebuild)(struct sk_buff *skb);
261 #define HAVE_HEADER_CACHE
262 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
263 void (*cache_update)(struct hh_cache *hh,
264 const struct net_device *dev,
265 const unsigned char *haddr);
268 /* These flag bits are private to the generic network queueing
269 * layer, they may not be explicitly referenced by any other
276 __LINK_STATE_PRESENT,
277 __LINK_STATE_NOCARRIER,
278 __LINK_STATE_LINKWATCH_PENDING,
279 __LINK_STATE_DORMANT,
284 * This structure holds at boot time configured netdevice settings. They
285 * are then used in the device probing.
287 struct netdev_boot_setup {
291 #define NETDEV_BOOT_SETUP_MAX 8
293 extern int __init netdev_boot_setup(char *str);
296 * Structure for NAPI scheduling similar to tasklet but with weighting
299 /* The poll_list must only be managed by the entity which
300 * changes the state of the NAPI_STATE_SCHED bit. This means
301 * whoever atomically sets that bit can add this napi_struct
302 * to the per-cpu poll_list, and whoever clears that bit
303 * can remove from the list right before clearing the bit.
305 struct list_head poll_list;
309 int (*poll)(struct napi_struct *, int);
310 #ifdef CONFIG_NETPOLL
311 spinlock_t poll_lock;
313 struct net_device *dev;
314 struct list_head dev_list;
320 NAPI_STATE_SCHED, /* Poll is scheduled */
321 NAPI_STATE_DISABLE, /* Disable pending */
324 extern void __napi_schedule(struct napi_struct *n);
326 static inline int napi_disable_pending(struct napi_struct *n)
328 return test_bit(NAPI_STATE_DISABLE, &n->state);
332 * napi_schedule_prep - check if napi can be scheduled
335 * Test if NAPI routine is already running, and if not mark
336 * it as running. This is used as a condition variable
337 * insure only one NAPI poll instance runs. We also make
338 * sure there is no pending NAPI disable.
340 static inline int napi_schedule_prep(struct napi_struct *n)
342 return !napi_disable_pending(n) &&
343 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
347 * napi_schedule - schedule NAPI poll
350 * Schedule NAPI poll routine to be called if it is not already
353 static inline void napi_schedule(struct napi_struct *n)
355 if (napi_schedule_prep(n))
359 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
360 static inline int napi_reschedule(struct napi_struct *napi)
362 if (napi_schedule_prep(napi)) {
363 __napi_schedule(napi);
370 * napi_complete - NAPI processing complete
373 * Mark NAPI processing as complete.
375 static inline void __napi_complete(struct napi_struct *n)
377 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
378 list_del(&n->poll_list);
379 smp_mb__before_clear_bit();
380 clear_bit(NAPI_STATE_SCHED, &n->state);
383 static inline void napi_complete(struct napi_struct *n)
387 local_irq_save(flags);
389 local_irq_restore(flags);
393 * napi_disable - prevent NAPI from scheduling
396 * Stop NAPI from being scheduled on this context.
397 * Waits till any outstanding processing completes.
399 static inline void napi_disable(struct napi_struct *n)
401 set_bit(NAPI_STATE_DISABLE, &n->state);
402 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
404 clear_bit(NAPI_STATE_DISABLE, &n->state);
408 * napi_enable - enable NAPI scheduling
411 * Resume NAPI from being scheduled on this context.
412 * Must be paired with napi_disable.
414 static inline void napi_enable(struct napi_struct *n)
416 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
417 smp_mb__before_clear_bit();
418 clear_bit(NAPI_STATE_SCHED, &n->state);
423 * napi_synchronize - wait until NAPI is not running
426 * Wait until NAPI is done being scheduled on this context.
427 * Waits till any outstanding processing completes but
428 * does not disable future activations.
430 static inline void napi_synchronize(const struct napi_struct *n)
432 while (test_bit(NAPI_STATE_SCHED, &n->state))
436 # define napi_synchronize(n) barrier()
439 enum netdev_queue_state_t
442 __QUEUE_STATE_FROZEN,
445 struct netdev_queue {
446 struct net_device *dev;
449 spinlock_t _xmit_lock;
451 struct Qdisc *qdisc_sleeping;
452 } ____cacheline_aligned_in_smp;
455 * The DEVICE structure.
456 * Actually, this whole structure is a big mistake. It mixes I/O
457 * data with strictly "high-level" data, and it has to know about
458 * almost every data structure used in the INET module.
460 * FIXME: cleanup struct net_device such that network protocol info
468 * This is the first field of the "visible" part of this structure
469 * (i.e. as seen by users in the "Space.c" file). It is the name
473 /* device name hash chain */
474 struct hlist_node name_hlist;
479 * I/O specific fields
480 * FIXME: Merge these and struct ifmap into one
482 unsigned long mem_end; /* shared mem end */
483 unsigned long mem_start; /* shared mem start */
484 unsigned long base_addr; /* device I/O address */
485 unsigned int irq; /* device IRQ number */
488 * Some hardware also needs these fields, but they are not
489 * part of the usual set specified in Space.c.
492 unsigned char if_port; /* Selectable AUI, TP,..*/
493 unsigned char dma; /* DMA channel */
497 struct list_head dev_list;
498 #ifdef CONFIG_NETPOLL
499 struct list_head napi_list;
502 /* The device initialization function. Called only once. */
503 int (*init)(struct net_device *dev);
505 /* ------- Fields preinitialized in Space.c finish here ------- */
507 /* Net device features */
508 unsigned long features;
509 #define NETIF_F_SG 1 /* Scatter/gather IO. */
510 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
511 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
512 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
513 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
514 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
515 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
516 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
517 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
518 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
519 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
520 #define NETIF_F_GSO 2048 /* Enable software GSO. */
521 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
522 /* do not use LLTX in new drivers */
523 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
524 #define NETIF_F_LRO 32768 /* large receive offload */
526 /* Segmentation offload features */
527 #define NETIF_F_GSO_SHIFT 16
528 #define NETIF_F_GSO_MASK 0xffff0000
529 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
530 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
531 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
532 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
533 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
535 /* List of features with software fallbacks. */
536 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
539 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
540 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
541 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
542 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
544 /* Interface index. Unique device identifier */
549 struct net_device_stats* (*get_stats)(struct net_device *dev);
550 struct net_device_stats stats;
552 #ifdef CONFIG_WIRELESS_EXT
553 /* List of functions to handle Wireless Extensions (instead of ioctl).
554 * See <net/iw_handler.h> for details. Jean II */
555 const struct iw_handler_def * wireless_handlers;
556 /* Instance data managed by the core of Wireless Extensions. */
557 struct iw_public_data * wireless_data;
559 const struct ethtool_ops *ethtool_ops;
561 /* Hardware header description */
562 const struct header_ops *header_ops;
565 * This marks the end of the "visible" part of the structure. All
566 * fields hereafter are internal to the system, and may change at
567 * will (read: may be cleaned up at will).
571 unsigned int flags; /* interface flags (a la BSD) */
572 unsigned short gflags;
573 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
574 unsigned short padded; /* How much padding added by alloc_netdev() */
576 unsigned char operstate; /* RFC2863 operstate */
577 unsigned char link_mode; /* mapping policy to operstate */
579 unsigned mtu; /* interface MTU value */
580 unsigned short type; /* interface hardware type */
581 unsigned short hard_header_len; /* hardware hdr length */
583 /* extra head- and tailroom the hardware may need, but not in all cases
584 * can this be guaranteed, especially tailroom. Some cases also use
585 * LL_MAX_HEADER instead to allocate the skb.
587 unsigned short needed_headroom;
588 unsigned short needed_tailroom;
590 struct net_device *master; /* Pointer to master device of a group,
591 * which this device is member of.
594 /* Interface address info. */
595 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
596 unsigned char addr_len; /* hardware address length */
597 unsigned short dev_id; /* for shared network cards */
599 spinlock_t addr_list_lock;
600 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
601 int uc_count; /* Number of installed ucasts */
603 struct dev_addr_list *mc_list; /* Multicast mac addresses */
604 int mc_count; /* Number of installed mcasts */
605 unsigned int promiscuity;
606 unsigned int allmulti;
609 /* Protocol specific pointers */
611 #ifdef CONFIG_NET_DSA
612 void *dsa_ptr; /* dsa specific data */
614 void *atalk_ptr; /* AppleTalk link */
615 void *ip_ptr; /* IPv4 specific data */
616 void *dn_ptr; /* DECnet specific data */
617 void *ip6_ptr; /* IPv6 specific data */
618 void *ec_ptr; /* Econet specific data */
619 void *ax25_ptr; /* AX.25 specific data */
620 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
621 assign before registering */
624 * Cache line mostly used on receive path (including eth_type_trans())
626 unsigned long last_rx; /* Time of last Rx */
627 /* Interface address info used in eth_type_trans() */
628 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
629 because most packets are unicast) */
631 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
633 struct netdev_queue rx_queue;
635 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
637 /* Number of TX queues allocated at alloc_netdev_mq() time */
638 unsigned int num_tx_queues;
640 /* Number of TX queues currently active in device */
641 unsigned int real_num_tx_queues;
643 unsigned long tx_queue_len; /* Max frames per queue allowed */
644 spinlock_t tx_global_lock;
646 * One part is mostly used on xmit path (device)
648 void *priv; /* pointer to private data */
649 int (*hard_start_xmit) (struct sk_buff *skb,
650 struct net_device *dev);
651 /* These may be needed for future network-power-down code. */
652 unsigned long trans_start; /* Time (in jiffies) of last Tx */
654 int watchdog_timeo; /* used by dev_watchdog() */
655 struct timer_list watchdog_timer;
658 * refcnt is a very hot point, so align it on SMP
660 /* Number of references to this device */
661 atomic_t refcnt ____cacheline_aligned_in_smp;
663 /* delayed register/unregister */
664 struct list_head todo_list;
665 /* device index hash chain */
666 struct hlist_node index_hlist;
668 struct net_device *link_watch_next;
670 /* register/unregister state machine */
671 enum { NETREG_UNINITIALIZED=0,
672 NETREG_REGISTERED, /* completed register_netdevice */
673 NETREG_UNREGISTERING, /* called unregister_netdevice */
674 NETREG_UNREGISTERED, /* completed unregister todo */
675 NETREG_RELEASED, /* called free_netdev */
678 /* Called after device is detached from network. */
679 void (*uninit)(struct net_device *dev);
680 /* Called after last user reference disappears. */
681 void (*destructor)(struct net_device *dev);
683 /* Pointers to interface service routines. */
684 int (*open)(struct net_device *dev);
685 int (*stop)(struct net_device *dev);
686 #define HAVE_NETDEV_POLL
687 #define HAVE_CHANGE_RX_FLAGS
688 void (*change_rx_flags)(struct net_device *dev,
690 #define HAVE_SET_RX_MODE
691 void (*set_rx_mode)(struct net_device *dev);
692 #define HAVE_MULTICAST
693 void (*set_multicast_list)(struct net_device *dev);
694 #define HAVE_SET_MAC_ADDR
695 int (*set_mac_address)(struct net_device *dev,
697 #define HAVE_VALIDATE_ADDR
698 int (*validate_addr)(struct net_device *dev);
699 #define HAVE_PRIVATE_IOCTL
700 int (*do_ioctl)(struct net_device *dev,
701 struct ifreq *ifr, int cmd);
702 #define HAVE_SET_CONFIG
703 int (*set_config)(struct net_device *dev,
705 #define HAVE_CHANGE_MTU
706 int (*change_mtu)(struct net_device *dev, int new_mtu);
708 #define HAVE_TX_TIMEOUT
709 void (*tx_timeout) (struct net_device *dev);
711 void (*vlan_rx_register)(struct net_device *dev,
712 struct vlan_group *grp);
713 void (*vlan_rx_add_vid)(struct net_device *dev,
715 void (*vlan_rx_kill_vid)(struct net_device *dev,
718 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
719 #ifdef CONFIG_NETPOLL
720 struct netpoll_info *npinfo;
722 #ifdef CONFIG_NET_POLL_CONTROLLER
723 void (*poll_controller)(struct net_device *dev);
726 u16 (*select_queue)(struct net_device *dev,
727 struct sk_buff *skb);
730 /* Network namespace this network device is inside */
734 /* mid-layer private */
738 struct net_bridge_port *br_port;
740 struct macvlan_port *macvlan_port;
742 struct garp_port *garp_port;
744 /* class/net/name entry */
746 /* space for optional statistics and wireless sysfs groups */
747 struct attribute_group *sysfs_groups[3];
749 /* rtnetlink link ops */
750 const struct rtnl_link_ops *rtnl_link_ops;
752 /* VLAN feature mask */
753 unsigned long vlan_features;
755 /* for setting kernel sock attribute on TCP connection setup */
756 #define GSO_MAX_SIZE 65536
757 unsigned int gso_max_size;
759 #define to_net_dev(d) container_of(d, struct net_device, dev)
761 #define NETDEV_ALIGN 32
762 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
765 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
768 return &dev->_tx[index];
771 static inline void netdev_for_each_tx_queue(struct net_device *dev,
772 void (*f)(struct net_device *,
773 struct netdev_queue *,
779 for (i = 0; i < dev->num_tx_queues; i++)
780 f(dev, &dev->_tx[i], arg);
784 * Net namespace inlines
787 struct net *dev_net(const struct net_device *dev)
797 void dev_net_set(struct net_device *dev, struct net *net)
800 release_net(dev->nd_net);
801 dev->nd_net = hold_net(net);
805 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
807 #ifdef CONFIG_NET_DSA_TAG_DSA
808 if (dev->dsa_ptr != NULL)
809 return dsa_uses_dsa_tags(dev->dsa_ptr);
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)
823 return (char *)dev + ((sizeof(struct net_device)
824 + NETDEV_ALIGN_CONST)
825 & ~NETDEV_ALIGN_CONST);
828 /* Set the sysfs physical device reference for the network logical device
829 * if set prior to registration will cause a symlink during initialization.
831 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
834 * netif_napi_add - initialize a napi context
835 * @dev: network device
836 * @napi: napi context
837 * @poll: polling function
838 * @weight: default weight
840 * netif_napi_add() must be used to initialize a napi context prior to calling
841 * *any* of the other napi related functions.
843 static inline void netif_napi_add(struct net_device *dev,
844 struct napi_struct *napi,
845 int (*poll)(struct napi_struct *, int),
848 INIT_LIST_HEAD(&napi->poll_list);
850 napi->weight = weight;
851 #ifdef CONFIG_NETPOLL
853 list_add(&napi->dev_list, &dev->napi_list);
854 spin_lock_init(&napi->poll_lock);
855 napi->poll_owner = -1;
857 set_bit(NAPI_STATE_SCHED, &napi->state);
861 * netif_napi_del - remove a napi context
862 * @napi: napi context
864 * netif_napi_del() removes a napi context from the network device napi list
866 static inline void netif_napi_del(struct napi_struct *napi)
868 #ifdef CONFIG_NETPOLL
869 list_del(&napi->dev_list);
874 __be16 type; /* This is really htons(ether_type). */
875 struct net_device *dev; /* NULL is wildcarded here */
876 int (*func) (struct sk_buff *,
878 struct packet_type *,
879 struct net_device *);
880 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
882 int (*gso_send_check)(struct sk_buff *skb);
883 void *af_packet_priv;
884 struct list_head list;
887 #include <linux/interrupt.h>
888 #include <linux/notifier.h>
890 extern rwlock_t dev_base_lock; /* Device list lock */
893 #define for_each_netdev(net, d) \
894 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
895 #define for_each_netdev_safe(net, d, n) \
896 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
897 #define for_each_netdev_continue(net, d) \
898 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
899 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
901 static inline struct net_device *next_net_device(struct net_device *dev)
903 struct list_head *lh;
907 lh = dev->dev_list.next;
908 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
911 static inline struct net_device *first_net_device(struct net *net)
913 return list_empty(&net->dev_base_head) ? NULL :
914 net_device_entry(net->dev_base_head.next);
917 extern int netdev_boot_setup_check(struct net_device *dev);
918 extern unsigned long netdev_boot_base(const char *prefix, int unit);
919 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
920 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
921 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
922 extern void dev_add_pack(struct packet_type *pt);
923 extern void dev_remove_pack(struct packet_type *pt);
924 extern void __dev_remove_pack(struct packet_type *pt);
926 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
927 unsigned short mask);
928 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
929 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
930 extern int dev_alloc_name(struct net_device *dev, const char *name);
931 extern int dev_open(struct net_device *dev);
932 extern int dev_close(struct net_device *dev);
933 extern void dev_disable_lro(struct net_device *dev);
934 extern int dev_queue_xmit(struct sk_buff *skb);
935 extern int register_netdevice(struct net_device *dev);
936 extern void unregister_netdevice(struct net_device *dev);
937 extern void free_netdev(struct net_device *dev);
938 extern void synchronize_net(void);
939 extern int register_netdevice_notifier(struct notifier_block *nb);
940 extern int unregister_netdevice_notifier(struct notifier_block *nb);
941 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
942 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
943 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
944 extern int dev_restart(struct net_device *dev);
945 #ifdef CONFIG_NETPOLL_TRAP
946 extern int netpoll_trap(void);
949 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
951 const void *daddr, const void *saddr,
954 if (!dev->header_ops || !dev->header_ops->create)
957 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
960 static inline int dev_parse_header(const struct sk_buff *skb,
961 unsigned char *haddr)
963 const struct net_device *dev = skb->dev;
965 if (!dev->header_ops || !dev->header_ops->parse)
967 return dev->header_ops->parse(skb, haddr);
970 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
971 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
972 static inline int unregister_gifconf(unsigned int family)
974 return register_gifconf(family, NULL);
978 * Incoming packets are placed on per-cpu queues so that
979 * no locking is needed.
983 struct Qdisc *output_queue;
984 struct sk_buff_head input_pkt_queue;
985 struct list_head poll_list;
986 struct sk_buff *completion_queue;
988 struct napi_struct backlog;
989 #ifdef CONFIG_NET_DMA
990 struct dma_chan *net_dma;
994 DECLARE_PER_CPU(struct softnet_data,softnet_data);
996 #define HAVE_NETIF_QUEUE
998 extern void __netif_schedule(struct Qdisc *q);
1000 static inline void netif_schedule_queue(struct netdev_queue *txq)
1002 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1003 __netif_schedule(txq->qdisc);
1006 static inline void netif_tx_schedule_all(struct net_device *dev)
1010 for (i = 0; i < dev->num_tx_queues; i++)
1011 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1014 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1016 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1020 * netif_start_queue - allow transmit
1021 * @dev: network device
1023 * Allow upper layers to call the device hard_start_xmit routine.
1025 static inline void netif_start_queue(struct net_device *dev)
1027 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1030 static inline void netif_tx_start_all_queues(struct net_device *dev)
1034 for (i = 0; i < dev->num_tx_queues; i++) {
1035 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1036 netif_tx_start_queue(txq);
1040 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1042 #ifdef CONFIG_NETPOLL_TRAP
1043 if (netpoll_trap()) {
1044 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1048 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1049 __netif_schedule(dev_queue->qdisc);
1053 * netif_wake_queue - restart transmit
1054 * @dev: network device
1056 * Allow upper layers to call the device hard_start_xmit routine.
1057 * Used for flow control when transmit resources are available.
1059 static inline void netif_wake_queue(struct net_device *dev)
1061 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1064 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1068 for (i = 0; i < dev->num_tx_queues; i++) {
1069 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1070 netif_tx_wake_queue(txq);
1074 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1076 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1080 * netif_stop_queue - stop transmitted packets
1081 * @dev: network device
1083 * Stop upper layers calling the device hard_start_xmit routine.
1084 * Used for flow control when transmit resources are unavailable.
1086 static inline void netif_stop_queue(struct net_device *dev)
1088 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1091 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1095 for (i = 0; i < dev->num_tx_queues; i++) {
1096 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1097 netif_tx_stop_queue(txq);
1101 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1103 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1107 * netif_queue_stopped - test if transmit queue is flowblocked
1108 * @dev: network device
1110 * Test if transmit queue on device is currently unable to send.
1112 static inline int netif_queue_stopped(const struct net_device *dev)
1114 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1117 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1119 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1123 * netif_running - test if up
1124 * @dev: network device
1126 * Test if the device has been brought up.
1128 static inline int netif_running(const struct net_device *dev)
1130 return test_bit(__LINK_STATE_START, &dev->state);
1134 * Routines to manage the subqueues on a device. We only need start
1135 * stop, and a check if it's stopped. All other device management is
1136 * done at the overall netdevice level.
1137 * Also test the device if we're multiqueue.
1141 * netif_start_subqueue - allow sending packets on subqueue
1142 * @dev: network device
1143 * @queue_index: sub queue index
1145 * Start individual transmit queue of a device with multiple transmit queues.
1147 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1149 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1150 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1154 * netif_stop_subqueue - stop sending packets on subqueue
1155 * @dev: network device
1156 * @queue_index: sub queue index
1158 * Stop individual transmit queue of a device with multiple transmit queues.
1160 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1162 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1163 #ifdef CONFIG_NETPOLL_TRAP
1167 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1171 * netif_subqueue_stopped - test status of subqueue
1172 * @dev: network device
1173 * @queue_index: sub queue index
1175 * Check individual transmit queue of a device with multiple transmit queues.
1177 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1180 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1181 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1184 static inline int netif_subqueue_stopped(const struct net_device *dev,
1185 struct sk_buff *skb)
1187 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1191 * netif_wake_subqueue - allow sending packets on subqueue
1192 * @dev: network device
1193 * @queue_index: sub queue index
1195 * Resume individual transmit queue of a device with multiple transmit queues.
1197 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1199 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1200 #ifdef CONFIG_NETPOLL_TRAP
1204 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1205 __netif_schedule(txq->qdisc);
1209 * netif_is_multiqueue - test if device has multiple transmit queues
1210 * @dev: network device
1212 * Check if device has multiple transmit queues
1214 static inline int netif_is_multiqueue(const struct net_device *dev)
1216 return (dev->num_tx_queues > 1);
1219 /* Use this variant when it is known for sure that it
1220 * is executing from hardware interrupt context or with hardware interrupts
1223 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1225 /* Use this variant in places where it could be invoked
1226 * from either hardware interrupt or other context, with hardware interrupts
1227 * either disabled or enabled.
1229 extern void dev_kfree_skb_any(struct sk_buff *skb);
1231 #define HAVE_NETIF_RX 1
1232 extern int netif_rx(struct sk_buff *skb);
1233 extern int netif_rx_ni(struct sk_buff *skb);
1234 #define HAVE_NETIF_RECEIVE_SKB 1
1235 extern int netif_receive_skb(struct sk_buff *skb);
1236 extern void netif_nit_deliver(struct sk_buff *skb);
1237 extern int dev_valid_name(const char *name);
1238 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1239 extern int dev_ethtool(struct net *net, struct ifreq *);
1240 extern unsigned dev_get_flags(const struct net_device *);
1241 extern int dev_change_flags(struct net_device *, unsigned);
1242 extern int dev_change_name(struct net_device *, const char *);
1243 extern int dev_set_alias(struct net_device *, const char *, size_t);
1244 extern int dev_change_net_namespace(struct net_device *,
1245 struct net *, const char *);
1246 extern int dev_set_mtu(struct net_device *, int);
1247 extern int dev_set_mac_address(struct net_device *,
1249 extern int dev_hard_start_xmit(struct sk_buff *skb,
1250 struct net_device *dev,
1251 struct netdev_queue *txq);
1253 extern int netdev_budget;
1255 /* Called by rtnetlink.c:rtnl_unlock() */
1256 extern void netdev_run_todo(void);
1259 * dev_put - release reference to device
1260 * @dev: network device
1262 * Release reference to device to allow it to be freed.
1264 static inline void dev_put(struct net_device *dev)
1266 atomic_dec(&dev->refcnt);
1270 * dev_hold - get reference to device
1271 * @dev: network device
1273 * Hold reference to device to keep it from being freed.
1275 static inline void dev_hold(struct net_device *dev)
1277 atomic_inc(&dev->refcnt);
1280 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1281 * and _off may be called from IRQ context, but it is caller
1282 * who is responsible for serialization of these calls.
1284 * The name carrier is inappropriate, these functions should really be
1285 * called netif_lowerlayer_*() because they represent the state of any
1286 * kind of lower layer not just hardware media.
1289 extern void linkwatch_fire_event(struct net_device *dev);
1292 * netif_carrier_ok - test if carrier present
1293 * @dev: network device
1295 * Check if carrier is present on device
1297 static inline int netif_carrier_ok(const struct net_device *dev)
1299 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1302 extern void __netdev_watchdog_up(struct net_device *dev);
1304 extern void netif_carrier_on(struct net_device *dev);
1306 extern void netif_carrier_off(struct net_device *dev);
1309 * netif_dormant_on - mark device as dormant.
1310 * @dev: network device
1312 * Mark device as dormant (as per RFC2863).
1314 * The dormant state indicates that the relevant interface is not
1315 * actually in a condition to pass packets (i.e., it is not 'up') but is
1316 * in a "pending" state, waiting for some external event. For "on-
1317 * demand" interfaces, this new state identifies the situation where the
1318 * interface is waiting for events to place it in the up state.
1321 static inline void netif_dormant_on(struct net_device *dev)
1323 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1324 linkwatch_fire_event(dev);
1328 * netif_dormant_off - set device as not dormant.
1329 * @dev: network device
1331 * Device is not in dormant state.
1333 static inline void netif_dormant_off(struct net_device *dev)
1335 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1336 linkwatch_fire_event(dev);
1340 * netif_dormant - test if carrier present
1341 * @dev: network device
1343 * Check if carrier is present on device
1345 static inline int netif_dormant(const struct net_device *dev)
1347 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1352 * netif_oper_up - test if device is operational
1353 * @dev: network device
1355 * Check if carrier is operational
1357 static inline int netif_oper_up(const struct net_device *dev) {
1358 return (dev->operstate == IF_OPER_UP ||
1359 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1363 * netif_device_present - is device available or removed
1364 * @dev: network device
1366 * Check if device has not been removed from system.
1368 static inline int netif_device_present(struct net_device *dev)
1370 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1373 extern void netif_device_detach(struct net_device *dev);
1375 extern void netif_device_attach(struct net_device *dev);
1378 * Network interface message level settings
1380 #define HAVE_NETIF_MSG 1
1383 NETIF_MSG_DRV = 0x0001,
1384 NETIF_MSG_PROBE = 0x0002,
1385 NETIF_MSG_LINK = 0x0004,
1386 NETIF_MSG_TIMER = 0x0008,
1387 NETIF_MSG_IFDOWN = 0x0010,
1388 NETIF_MSG_IFUP = 0x0020,
1389 NETIF_MSG_RX_ERR = 0x0040,
1390 NETIF_MSG_TX_ERR = 0x0080,
1391 NETIF_MSG_TX_QUEUED = 0x0100,
1392 NETIF_MSG_INTR = 0x0200,
1393 NETIF_MSG_TX_DONE = 0x0400,
1394 NETIF_MSG_RX_STATUS = 0x0800,
1395 NETIF_MSG_PKTDATA = 0x1000,
1396 NETIF_MSG_HW = 0x2000,
1397 NETIF_MSG_WOL = 0x4000,
1400 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1401 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1402 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1403 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1404 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1405 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1406 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1407 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1408 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1409 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1410 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1411 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1412 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1413 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1414 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1416 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1419 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1420 return default_msg_enable_bits;
1421 if (debug_value == 0) /* no output */
1423 /* set low N bits */
1424 return (1 << debug_value) - 1;
1427 /* Test if receive needs to be scheduled but only if up */
1428 static inline int netif_rx_schedule_prep(struct net_device *dev,
1429 struct napi_struct *napi)
1431 return napi_schedule_prep(napi);
1434 /* Add interface to tail of rx poll list. This assumes that _prep has
1435 * already been called and returned 1.
1437 static inline void __netif_rx_schedule(struct net_device *dev,
1438 struct napi_struct *napi)
1440 __napi_schedule(napi);
1443 /* Try to reschedule poll. Called by irq handler. */
1445 static inline void netif_rx_schedule(struct net_device *dev,
1446 struct napi_struct *napi)
1448 if (netif_rx_schedule_prep(dev, napi))
1449 __netif_rx_schedule(dev, napi);
1452 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1453 static inline int netif_rx_reschedule(struct net_device *dev,
1454 struct napi_struct *napi)
1456 if (napi_schedule_prep(napi)) {
1457 __netif_rx_schedule(dev, napi);
1463 /* same as netif_rx_complete, except that local_irq_save(flags)
1464 * has already been issued
1466 static inline void __netif_rx_complete(struct net_device *dev,
1467 struct napi_struct *napi)
1469 __napi_complete(napi);
1472 /* Remove interface from poll list: it must be in the poll list
1473 * on current cpu. This primitive is called by dev->poll(), when
1474 * it completes the work. The device cannot be out of poll list at this
1475 * moment, it is BUG().
1477 static inline void netif_rx_complete(struct net_device *dev,
1478 struct napi_struct *napi)
1480 unsigned long flags;
1482 local_irq_save(flags);
1483 __netif_rx_complete(dev, napi);
1484 local_irq_restore(flags);
1487 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1489 spin_lock(&txq->_xmit_lock);
1490 txq->xmit_lock_owner = cpu;
1493 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1495 spin_lock_bh(&txq->_xmit_lock);
1496 txq->xmit_lock_owner = smp_processor_id();
1499 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1501 int ok = spin_trylock(&txq->_xmit_lock);
1503 txq->xmit_lock_owner = smp_processor_id();
1507 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1509 txq->xmit_lock_owner = -1;
1510 spin_unlock(&txq->_xmit_lock);
1513 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1515 txq->xmit_lock_owner = -1;
1516 spin_unlock_bh(&txq->_xmit_lock);
1520 * netif_tx_lock - grab network device transmit lock
1521 * @dev: network device
1522 * @cpu: cpu number of lock owner
1524 * Get network device transmit lock
1526 static inline void netif_tx_lock(struct net_device *dev)
1531 spin_lock(&dev->tx_global_lock);
1532 cpu = smp_processor_id();
1533 for (i = 0; i < dev->num_tx_queues; i++) {
1534 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1536 /* We are the only thread of execution doing a
1537 * freeze, but we have to grab the _xmit_lock in
1538 * order to synchronize with threads which are in
1539 * the ->hard_start_xmit() handler and already
1540 * checked the frozen bit.
1542 __netif_tx_lock(txq, cpu);
1543 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1544 __netif_tx_unlock(txq);
1548 static inline void netif_tx_lock_bh(struct net_device *dev)
1554 static inline void netif_tx_unlock(struct net_device *dev)
1558 for (i = 0; i < dev->num_tx_queues; i++) {
1559 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1561 /* No need to grab the _xmit_lock here. If the
1562 * queue is not stopped for another reason, we
1565 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1566 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1567 __netif_schedule(txq->qdisc);
1569 spin_unlock(&dev->tx_global_lock);
1572 static inline void netif_tx_unlock_bh(struct net_device *dev)
1574 netif_tx_unlock(dev);
1578 #define HARD_TX_LOCK(dev, txq, cpu) { \
1579 if ((dev->features & NETIF_F_LLTX) == 0) { \
1580 __netif_tx_lock(txq, cpu); \
1584 #define HARD_TX_UNLOCK(dev, txq) { \
1585 if ((dev->features & NETIF_F_LLTX) == 0) { \
1586 __netif_tx_unlock(txq); \
1590 static inline void netif_tx_disable(struct net_device *dev)
1596 cpu = smp_processor_id();
1597 for (i = 0; i < dev->num_tx_queues; i++) {
1598 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1600 __netif_tx_lock(txq, cpu);
1601 netif_tx_stop_queue(txq);
1602 __netif_tx_unlock(txq);
1607 static inline void netif_addr_lock(struct net_device *dev)
1609 spin_lock(&dev->addr_list_lock);
1612 static inline void netif_addr_lock_bh(struct net_device *dev)
1614 spin_lock_bh(&dev->addr_list_lock);
1617 static inline void netif_addr_unlock(struct net_device *dev)
1619 spin_unlock(&dev->addr_list_lock);
1622 static inline void netif_addr_unlock_bh(struct net_device *dev)
1624 spin_unlock_bh(&dev->addr_list_lock);
1627 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1629 extern void ether_setup(struct net_device *dev);
1631 /* Support for loadable net-drivers */
1632 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1633 void (*setup)(struct net_device *),
1634 unsigned int queue_count);
1635 #define alloc_netdev(sizeof_priv, name, setup) \
1636 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1637 extern int register_netdev(struct net_device *dev);
1638 extern void unregister_netdev(struct net_device *dev);
1639 /* Functions used for secondary unicast and multicast support */
1640 extern void dev_set_rx_mode(struct net_device *dev);
1641 extern void __dev_set_rx_mode(struct net_device *dev);
1642 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1643 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1644 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1645 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1646 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1647 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1648 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1649 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1650 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1651 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1652 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1653 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1654 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1655 extern int dev_set_allmulti(struct net_device *dev, int inc);
1656 extern void netdev_state_change(struct net_device *dev);
1657 extern void netdev_bonding_change(struct net_device *dev);
1658 extern void netdev_features_change(struct net_device *dev);
1659 /* Load a device via the kmod */
1660 extern void dev_load(struct net *net, const char *name);
1661 extern void dev_mcast_init(void);
1662 extern int netdev_max_backlog;
1663 extern int weight_p;
1664 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1665 extern int skb_checksum_help(struct sk_buff *skb);
1666 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1668 extern void netdev_rx_csum_fault(struct net_device *dev);
1670 static inline void netdev_rx_csum_fault(struct net_device *dev)
1674 /* rx skb timestamps */
1675 extern void net_enable_timestamp(void);
1676 extern void net_disable_timestamp(void);
1678 #ifdef CONFIG_PROC_FS
1679 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1680 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1681 extern void dev_seq_stop(struct seq_file *seq, void *v);
1684 extern int netdev_class_create_file(struct class_attribute *class_attr);
1685 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1687 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1689 extern void linkwatch_run_queue(void);
1691 extern int netdev_compute_features(unsigned long all, unsigned long one);
1693 static inline int net_gso_ok(int features, int gso_type)
1695 int feature = gso_type << NETIF_F_GSO_SHIFT;
1696 return (features & feature) == feature;
1699 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1701 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
1704 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1706 return skb_is_gso(skb) &&
1707 (!skb_gso_ok(skb, dev->features) ||
1708 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1711 static inline void netif_set_gso_max_size(struct net_device *dev,
1714 dev->gso_max_size = size;
1717 /* On bonding slaves other than the currently active slave, suppress
1718 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1719 * ARP on active-backup slaves with arp_validate enabled.
1721 static inline int skb_bond_should_drop(struct sk_buff *skb)
1723 struct net_device *dev = skb->dev;
1724 struct net_device *master = dev->master;
1727 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1728 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1729 skb->protocol == __constant_htons(ETH_P_ARP))
1732 if (master->priv_flags & IFF_MASTER_ALB) {
1733 if (skb->pkt_type != PACKET_BROADCAST &&
1734 skb->pkt_type != PACKET_MULTICAST)
1737 if (master->priv_flags & IFF_MASTER_8023AD &&
1738 skb->protocol == __constant_htons(ETH_P_SLOW))
1746 #endif /* __KERNEL__ */
1748 #endif /* _LINUX_DEV_H */