2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
33 #include <linux/timer.h>
34 #include <linux/delay.h>
36 #include <asm/atomic.h>
37 #include <asm/cache.h>
38 #include <asm/byteorder.h>
40 #include <linux/device.h>
41 #include <linux/percpu.h>
42 #include <linux/rculist.h>
43 #include <linux/dmaengine.h>
44 #include <linux/workqueue.h>
46 #include <linux/ethtool.h>
47 #include <net/net_namespace.h>
50 #include <net/dcbnl.h>
57 /* source back-compat hooks */
58 #define SET_ETHTOOL_OPS(netdev,ops) \
59 ( (netdev)->ethtool_ops = (ops) )
61 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
62 functions are available. */
63 #define HAVE_FREE_NETDEV /* free_netdev() */
64 #define HAVE_NETDEV_PRIV /* netdev_priv() */
66 #define NET_XMIT_SUCCESS 0
67 #define NET_XMIT_DROP 1 /* skb dropped */
68 #define NET_XMIT_CN 2 /* congestion notification */
69 #define NET_XMIT_POLICED 3 /* skb is shot by police */
70 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */
72 /* Backlog congestion levels */
73 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
74 #define NET_RX_DROP 1 /* packet dropped */
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) || defined(CONFIG_TR_MODULE)
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__ */
122 * Network device statistics. Akin to the 2.0 ether stats but
123 * with byte counters.
126 struct net_device_stats
128 unsigned long rx_packets; /* total packets received */
129 unsigned long tx_packets; /* total packets transmitted */
130 unsigned long rx_bytes; /* total bytes received */
131 unsigned long tx_bytes; /* total bytes transmitted */
132 unsigned long rx_errors; /* bad packets received */
133 unsigned long tx_errors; /* packet transmit problems */
134 unsigned long rx_dropped; /* no space in linux buffers */
135 unsigned long tx_dropped; /* no space available in linux */
136 unsigned long multicast; /* multicast packets received */
137 unsigned long collisions;
139 /* detailed rx_errors: */
140 unsigned long rx_length_errors;
141 unsigned long rx_over_errors; /* receiver ring buff overflow */
142 unsigned long rx_crc_errors; /* recved pkt with crc error */
143 unsigned long rx_frame_errors; /* recv'd frame alignment error */
144 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
145 unsigned long rx_missed_errors; /* receiver missed packet */
147 /* detailed tx_errors */
148 unsigned long tx_aborted_errors;
149 unsigned long tx_carrier_errors;
150 unsigned long tx_fifo_errors;
151 unsigned long tx_heartbeat_errors;
152 unsigned long tx_window_errors;
155 unsigned long rx_compressed;
156 unsigned long tx_compressed;
160 /* Media selection options. */
173 #include <linux/cache.h>
174 #include <linux/skbuff.h>
180 struct netif_rx_stats
184 unsigned time_squeeze;
185 unsigned cpu_collision;
188 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
192 struct dev_addr_list *next;
193 u8 da_addr[MAX_ADDR_LEN];
201 * We tag multicasts with these structures.
204 #define dev_mc_list dev_addr_list
205 #define dmi_addr da_addr
206 #define dmi_addrlen da_addrlen
207 #define dmi_users da_users
208 #define dmi_gusers da_gusers
210 struct netdev_hw_addr {
211 struct list_head list;
212 unsigned char addr[MAX_ADDR_LEN];
214 #define NETDEV_HW_ADDR_T_LAN 1
215 #define NETDEV_HW_ADDR_T_SAN 2
216 #define NETDEV_HW_ADDR_T_SLAVE 3
217 #define NETDEV_HW_ADDR_T_UNICAST 4
220 struct rcu_head rcu_head;
223 struct netdev_hw_addr_list {
224 struct list_head list;
230 struct hh_cache *hh_next; /* Next entry */
231 atomic_t hh_refcnt; /* number of users */
233 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
235 * They are mostly read, but hh_refcnt may be changed quite frequently,
236 * incurring cache line ping pongs.
238 __be16 hh_type ____cacheline_aligned_in_smp;
239 /* protocol identifier, f.e ETH_P_IP
240 * NOTE: For VLANs, this will be the
241 * encapuslated type. --BLG
243 u16 hh_len; /* length of header */
244 int (*hh_output)(struct sk_buff *skb);
247 /* cached hardware header; allow for machine alignment needs. */
248 #define HH_DATA_MOD 16
249 #define HH_DATA_OFF(__len) \
250 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
251 #define HH_DATA_ALIGN(__len) \
252 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
253 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
256 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
258 * dev->hard_header_len ? (dev->hard_header_len +
259 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
261 * We could use other alignment values, but we must maintain the
262 * relationship HH alignment <= LL alignment.
264 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
267 #define LL_RESERVED_SPACE(dev) \
268 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
269 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
270 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
271 #define LL_ALLOCATED_SPACE(dev) \
272 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
275 int (*create) (struct sk_buff *skb, struct net_device *dev,
276 unsigned short type, const void *daddr,
277 const void *saddr, unsigned len);
278 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
279 int (*rebuild)(struct sk_buff *skb);
280 #define HAVE_HEADER_CACHE
281 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
282 void (*cache_update)(struct hh_cache *hh,
283 const struct net_device *dev,
284 const unsigned char *haddr);
287 /* These flag bits are private to the generic network queueing
288 * layer, they may not be explicitly referenced by any other
295 __LINK_STATE_PRESENT,
296 __LINK_STATE_NOCARRIER,
297 __LINK_STATE_LINKWATCH_PENDING,
298 __LINK_STATE_DORMANT,
303 * This structure holds at boot time configured netdevice settings. They
304 * are then used in the device probing.
306 struct netdev_boot_setup {
310 #define NETDEV_BOOT_SETUP_MAX 8
312 extern int __init netdev_boot_setup(char *str);
315 * Structure for NAPI scheduling similar to tasklet but with weighting
318 /* The poll_list must only be managed by the entity which
319 * changes the state of the NAPI_STATE_SCHED bit. This means
320 * whoever atomically sets that bit can add this napi_struct
321 * to the per-cpu poll_list, and whoever clears that bit
322 * can remove from the list right before clearing the bit.
324 struct list_head poll_list;
328 int (*poll)(struct napi_struct *, int);
329 #ifdef CONFIG_NETPOLL
330 spinlock_t poll_lock;
334 unsigned int gro_count;
336 struct net_device *dev;
337 struct list_head dev_list;
338 struct sk_buff *gro_list;
344 NAPI_STATE_SCHED, /* Poll is scheduled */
345 NAPI_STATE_DISABLE, /* Disable pending */
346 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
357 extern void __napi_schedule(struct napi_struct *n);
359 static inline int napi_disable_pending(struct napi_struct *n)
361 return test_bit(NAPI_STATE_DISABLE, &n->state);
365 * napi_schedule_prep - check if napi can be scheduled
368 * Test if NAPI routine is already running, and if not mark
369 * it as running. This is used as a condition variable
370 * insure only one NAPI poll instance runs. We also make
371 * sure there is no pending NAPI disable.
373 static inline int napi_schedule_prep(struct napi_struct *n)
375 return !napi_disable_pending(n) &&
376 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
380 * napi_schedule - schedule NAPI poll
383 * Schedule NAPI poll routine to be called if it is not already
386 static inline void napi_schedule(struct napi_struct *n)
388 if (napi_schedule_prep(n))
392 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
393 static inline int napi_reschedule(struct napi_struct *napi)
395 if (napi_schedule_prep(napi)) {
396 __napi_schedule(napi);
403 * napi_complete - NAPI processing complete
406 * Mark NAPI processing as complete.
408 extern void __napi_complete(struct napi_struct *n);
409 extern void napi_complete(struct napi_struct *n);
412 * napi_disable - prevent NAPI from scheduling
415 * Stop NAPI from being scheduled on this context.
416 * Waits till any outstanding processing completes.
418 static inline void napi_disable(struct napi_struct *n)
420 set_bit(NAPI_STATE_DISABLE, &n->state);
421 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
423 clear_bit(NAPI_STATE_DISABLE, &n->state);
427 * napi_enable - enable NAPI scheduling
430 * Resume NAPI from being scheduled on this context.
431 * Must be paired with napi_disable.
433 static inline void napi_enable(struct napi_struct *n)
435 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
436 smp_mb__before_clear_bit();
437 clear_bit(NAPI_STATE_SCHED, &n->state);
442 * napi_synchronize - wait until NAPI is not running
445 * Wait until NAPI is done being scheduled on this context.
446 * Waits till any outstanding processing completes but
447 * does not disable future activations.
449 static inline void napi_synchronize(const struct napi_struct *n)
451 while (test_bit(NAPI_STATE_SCHED, &n->state))
455 # define napi_synchronize(n) barrier()
458 enum netdev_queue_state_t
461 __QUEUE_STATE_FROZEN,
464 struct netdev_queue {
468 struct net_device *dev;
471 struct Qdisc *qdisc_sleeping;
475 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
478 * please use this field instead of dev->trans_start
480 unsigned long trans_start;
481 unsigned long tx_bytes;
482 unsigned long tx_packets;
483 unsigned long tx_dropped;
484 } ____cacheline_aligned_in_smp;
488 * This structure defines the management hooks for network devices.
489 * The following hooks can be defined; unless noted otherwise, they are
490 * optional and can be filled with a null pointer.
492 * int (*ndo_init)(struct net_device *dev);
493 * This function is called once when network device is registered.
494 * The network device can use this to any late stage initializaton
495 * or semantic validattion. It can fail with an error code which will
496 * be propogated back to register_netdev
498 * void (*ndo_uninit)(struct net_device *dev);
499 * This function is called when device is unregistered or when registration
500 * fails. It is not called if init fails.
502 * int (*ndo_open)(struct net_device *dev);
503 * This function is called when network device transistions to the up
506 * int (*ndo_stop)(struct net_device *dev);
507 * This function is called when network device transistions to the down
510 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev);
511 * Called when a packet needs to be transmitted.
512 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED,
513 * Required can not be NULL.
515 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
516 * Called to decide which queue to when device supports multiple
519 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
520 * This function is called to allow device receiver to make
521 * changes to configuration when multicast or promiscious is enabled.
523 * void (*ndo_set_rx_mode)(struct net_device *dev);
524 * This function is called device changes address list filtering.
526 * void (*ndo_set_multicast_list)(struct net_device *dev);
527 * This function is called when the multicast address list changes.
529 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
530 * This function is called when the Media Access Control address
531 * needs to be changed. If this interface is not defined, the
532 * mac address can not be changed.
534 * int (*ndo_validate_addr)(struct net_device *dev);
535 * Test if Media Access Control address is valid for the device.
537 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
538 * Called when a user request an ioctl which can't be handled by
539 * the generic interface code. If not defined ioctl's return
540 * not supported error code.
542 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
543 * Used to set network devices bus interface parameters. This interface
544 * is retained for legacy reason, new devices should use the bus
545 * interface (PCI) for low level management.
547 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
548 * Called when a user wants to change the Maximum Transfer Unit
549 * of a device. If not defined, any request to change MTU will
550 * will return an error.
552 * void (*ndo_tx_timeout)(struct net_device *dev);
553 * Callback uses when the transmitter has not made any progress
554 * for dev->watchdog ticks.
556 * struct net_device_stats* (*get_stats)(struct net_device *dev);
557 * Called when a user wants to get the network device usage
558 * statistics. If not defined, the counters in dev->stats will
561 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
562 * If device support VLAN receive accleration
563 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
564 * when vlan groups for the device changes. Note: grp is NULL
565 * if no vlan's groups are being used.
567 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
568 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
569 * this function is called when a VLAN id is registered.
571 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
572 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
573 * this function is called when a VLAN id is unregistered.
575 * void (*ndo_poll_controller)(struct net_device *dev);
577 #define HAVE_NET_DEVICE_OPS
578 struct net_device_ops {
579 int (*ndo_init)(struct net_device *dev);
580 void (*ndo_uninit)(struct net_device *dev);
581 int (*ndo_open)(struct net_device *dev);
582 int (*ndo_stop)(struct net_device *dev);
583 int (*ndo_start_xmit) (struct sk_buff *skb,
584 struct net_device *dev);
585 u16 (*ndo_select_queue)(struct net_device *dev,
586 struct sk_buff *skb);
587 #define HAVE_CHANGE_RX_FLAGS
588 void (*ndo_change_rx_flags)(struct net_device *dev,
590 #define HAVE_SET_RX_MODE
591 void (*ndo_set_rx_mode)(struct net_device *dev);
592 #define HAVE_MULTICAST
593 void (*ndo_set_multicast_list)(struct net_device *dev);
594 #define HAVE_SET_MAC_ADDR
595 int (*ndo_set_mac_address)(struct net_device *dev,
597 #define HAVE_VALIDATE_ADDR
598 int (*ndo_validate_addr)(struct net_device *dev);
599 #define HAVE_PRIVATE_IOCTL
600 int (*ndo_do_ioctl)(struct net_device *dev,
601 struct ifreq *ifr, int cmd);
602 #define HAVE_SET_CONFIG
603 int (*ndo_set_config)(struct net_device *dev,
605 #define HAVE_CHANGE_MTU
606 int (*ndo_change_mtu)(struct net_device *dev,
608 int (*ndo_neigh_setup)(struct net_device *dev,
609 struct neigh_parms *);
610 #define HAVE_TX_TIMEOUT
611 void (*ndo_tx_timeout) (struct net_device *dev);
613 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
615 void (*ndo_vlan_rx_register)(struct net_device *dev,
616 struct vlan_group *grp);
617 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
619 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
621 #ifdef CONFIG_NET_POLL_CONTROLLER
622 #define HAVE_NETDEV_POLL
623 void (*ndo_poll_controller)(struct net_device *dev);
625 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
626 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
628 struct scatterlist *sgl,
630 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
636 * The DEVICE structure.
637 * Actually, this whole structure is a big mistake. It mixes I/O
638 * data with strictly "high-level" data, and it has to know about
639 * almost every data structure used in the INET module.
641 * FIXME: cleanup struct net_device such that network protocol info
649 * This is the first field of the "visible" part of this structure
650 * (i.e. as seen by users in the "Space.c" file). It is the name
654 /* device name hash chain */
655 struct hlist_node name_hlist;
660 * I/O specific fields
661 * FIXME: Merge these and struct ifmap into one
663 unsigned long mem_end; /* shared mem end */
664 unsigned long mem_start; /* shared mem start */
665 unsigned long base_addr; /* device I/O address */
666 unsigned int irq; /* device IRQ number */
669 * Some hardware also needs these fields, but they are not
670 * part of the usual set specified in Space.c.
673 unsigned char if_port; /* Selectable AUI, TP,..*/
674 unsigned char dma; /* DMA channel */
678 struct list_head dev_list;
679 struct list_head napi_list;
681 /* Net device features */
682 unsigned long features;
683 #define NETIF_F_SG 1 /* Scatter/gather IO. */
684 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
685 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
686 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
687 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
688 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
689 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
690 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
691 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
692 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
693 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
694 #define NETIF_F_GSO 2048 /* Enable software GSO. */
695 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
696 /* do not use LLTX in new drivers */
697 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
698 #define NETIF_F_GRO 16384 /* Generic receive offload */
699 #define NETIF_F_LRO 32768 /* large receive offload */
701 /* the GSO_MASK reserves bits 16 through 23 */
702 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
703 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
704 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
706 /* Segmentation offload features */
707 #define NETIF_F_GSO_SHIFT 16
708 #define NETIF_F_GSO_MASK 0x00ff0000
709 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
710 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
711 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
712 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
713 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
714 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
716 /* List of features with software fallbacks. */
717 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
720 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
721 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
722 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
723 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
726 * If one device supports one of these features, then enable them
727 * for all in netdev_increment_features.
729 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
730 NETIF_F_SG | NETIF_F_HIGHDMA | \
733 /* Interface index. Unique device identifier */
737 struct net_device_stats stats;
739 #ifdef CONFIG_WIRELESS_EXT
740 /* List of functions to handle Wireless Extensions (instead of ioctl).
741 * See <net/iw_handler.h> for details. Jean II */
742 const struct iw_handler_def * wireless_handlers;
743 /* Instance data managed by the core of Wireless Extensions. */
744 struct iw_public_data * wireless_data;
746 /* Management operations */
747 const struct net_device_ops *netdev_ops;
748 const struct ethtool_ops *ethtool_ops;
750 /* Hardware header description */
751 const struct header_ops *header_ops;
753 unsigned int flags; /* interface flags (a la BSD) */
754 unsigned short gflags;
755 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
756 unsigned short padded; /* How much padding added by alloc_netdev() */
758 unsigned char operstate; /* RFC2863 operstate */
759 unsigned char link_mode; /* mapping policy to operstate */
761 unsigned mtu; /* interface MTU value */
762 unsigned short type; /* interface hardware type */
763 unsigned short hard_header_len; /* hardware hdr length */
765 /* extra head- and tailroom the hardware may need, but not in all cases
766 * can this be guaranteed, especially tailroom. Some cases also use
767 * LL_MAX_HEADER instead to allocate the skb.
769 unsigned short needed_headroom;
770 unsigned short needed_tailroom;
772 struct net_device *master; /* Pointer to master device of a group,
773 * which this device is member of.
776 /* Interface address info. */
777 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
778 unsigned char addr_len; /* hardware address length */
779 unsigned short dev_id; /* for shared network cards */
781 struct netdev_hw_addr_list uc; /* Secondary unicast
784 spinlock_t addr_list_lock;
785 struct dev_addr_list *mc_list; /* Multicast mac addresses */
786 int mc_count; /* Number of installed mcasts */
787 unsigned int promiscuity;
788 unsigned int allmulti;
791 /* Protocol specific pointers */
793 #ifdef CONFIG_NET_DSA
794 void *dsa_ptr; /* dsa specific data */
796 void *atalk_ptr; /* AppleTalk link */
797 void *ip_ptr; /* IPv4 specific data */
798 void *dn_ptr; /* DECnet specific data */
799 void *ip6_ptr; /* IPv6 specific data */
800 void *ec_ptr; /* Econet specific data */
801 void *ax25_ptr; /* AX.25 specific data */
802 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
803 assign before registering */
806 * Cache line mostly used on receive path (including eth_type_trans())
808 unsigned long last_rx; /* Time of last Rx */
809 /* Interface address info used in eth_type_trans() */
810 unsigned char *dev_addr; /* hw address, (before bcast
811 because most packets are
814 struct netdev_hw_addr_list dev_addrs; /* list of device
817 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
819 struct netdev_queue rx_queue;
821 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
823 /* Number of TX queues allocated at alloc_netdev_mq() time */
824 unsigned int num_tx_queues;
826 /* Number of TX queues currently active in device */
827 unsigned int real_num_tx_queues;
829 unsigned long tx_queue_len; /* Max frames per queue allowed */
830 spinlock_t tx_global_lock;
832 * One part is mostly used on xmit path (device)
834 /* These may be needed for future network-power-down code. */
837 * trans_start here is expensive for high speed devices on SMP,
838 * please use netdev_queue->trans_start instead.
840 unsigned long trans_start; /* Time (in jiffies) of last Tx */
842 int watchdog_timeo; /* used by dev_watchdog() */
843 struct timer_list watchdog_timer;
845 /* Number of references to this device */
846 atomic_t refcnt ____cacheline_aligned_in_smp;
848 /* delayed register/unregister */
849 struct list_head todo_list;
850 /* device index hash chain */
851 struct hlist_node index_hlist;
853 struct net_device *link_watch_next;
855 /* register/unregister state machine */
856 enum { NETREG_UNINITIALIZED=0,
857 NETREG_REGISTERED, /* completed register_netdevice */
858 NETREG_UNREGISTERING, /* called unregister_netdevice */
859 NETREG_UNREGISTERED, /* completed unregister todo */
860 NETREG_RELEASED, /* called free_netdev */
861 NETREG_DUMMY, /* dummy device for NAPI poll */
864 /* Called from unregister, can be used to call free_netdev */
865 void (*destructor)(struct net_device *dev);
867 #ifdef CONFIG_NETPOLL
868 struct netpoll_info *npinfo;
872 /* Network namespace this network device is inside */
876 /* mid-layer private */
880 struct net_bridge_port *br_port;
882 struct macvlan_port *macvlan_port;
884 struct garp_port *garp_port;
886 /* class/net/name entry */
888 /* space for optional statistics and wireless sysfs groups */
889 struct attribute_group *sysfs_groups[3];
891 /* rtnetlink link ops */
892 const struct rtnl_link_ops *rtnl_link_ops;
894 /* VLAN feature mask */
895 unsigned long vlan_features;
897 /* for setting kernel sock attribute on TCP connection setup */
898 #define GSO_MAX_SIZE 65536
899 unsigned int gso_max_size;
902 /* Data Center Bridging netlink ops */
903 struct dcbnl_rtnl_ops *dcbnl_ops;
906 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
907 /* max exchange id for FCoE LRO by ddp */
908 unsigned int fcoe_ddp_xid;
911 #define to_net_dev(d) container_of(d, struct net_device, dev)
913 #define NETDEV_ALIGN 32
916 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
919 return &dev->_tx[index];
922 static inline void netdev_for_each_tx_queue(struct net_device *dev,
923 void (*f)(struct net_device *,
924 struct netdev_queue *,
930 for (i = 0; i < dev->num_tx_queues; i++)
931 f(dev, &dev->_tx[i], arg);
935 * Net namespace inlines
938 struct net *dev_net(const struct net_device *dev)
948 void dev_net_set(struct net_device *dev, struct net *net)
951 release_net(dev->nd_net);
952 dev->nd_net = hold_net(net);
956 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
958 #ifdef CONFIG_NET_DSA_TAG_DSA
959 if (dev->dsa_ptr != NULL)
960 return dsa_uses_dsa_tags(dev->dsa_ptr);
966 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
968 #ifdef CONFIG_NET_DSA_TAG_TRAILER
969 if (dev->dsa_ptr != NULL)
970 return dsa_uses_trailer_tags(dev->dsa_ptr);
977 * netdev_priv - access network device private data
978 * @dev: network device
980 * Get network device private data
982 static inline void *netdev_priv(const struct net_device *dev)
984 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
987 /* Set the sysfs physical device reference for the network logical device
988 * if set prior to registration will cause a symlink during initialization.
990 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
993 * netif_napi_add - initialize a napi context
994 * @dev: network device
995 * @napi: napi context
996 * @poll: polling function
997 * @weight: default weight
999 * netif_napi_add() must be used to initialize a napi context prior to calling
1000 * *any* of the other napi related functions.
1002 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1003 int (*poll)(struct napi_struct *, int), int weight);
1006 * netif_napi_del - remove a napi context
1007 * @napi: napi context
1009 * netif_napi_del() removes a napi context from the network device napi list
1011 void netif_napi_del(struct napi_struct *napi);
1013 struct napi_gro_cb {
1014 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1017 /* Length of frag0. */
1018 unsigned int frag0_len;
1020 /* This indicates where we are processing relative to skb->data. */
1023 /* This is non-zero if the packet may be of the same flow. */
1026 /* This is non-zero if the packet cannot be merged with the new skb. */
1029 /* Number of segments aggregated. */
1036 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1038 struct packet_type {
1039 __be16 type; /* This is really htons(ether_type). */
1040 struct net_device *dev; /* NULL is wildcarded here */
1041 int (*func) (struct sk_buff *,
1042 struct net_device *,
1043 struct packet_type *,
1044 struct net_device *);
1045 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1047 int (*gso_send_check)(struct sk_buff *skb);
1048 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1049 struct sk_buff *skb);
1050 int (*gro_complete)(struct sk_buff *skb);
1051 void *af_packet_priv;
1052 struct list_head list;
1055 #include <linux/interrupt.h>
1056 #include <linux/notifier.h>
1058 extern rwlock_t dev_base_lock; /* Device list lock */
1061 #define for_each_netdev(net, d) \
1062 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1063 #define for_each_netdev_safe(net, d, n) \
1064 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1065 #define for_each_netdev_continue(net, d) \
1066 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1067 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1069 static inline struct net_device *next_net_device(struct net_device *dev)
1071 struct list_head *lh;
1075 lh = dev->dev_list.next;
1076 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1079 static inline struct net_device *first_net_device(struct net *net)
1081 return list_empty(&net->dev_base_head) ? NULL :
1082 net_device_entry(net->dev_base_head.next);
1085 extern int netdev_boot_setup_check(struct net_device *dev);
1086 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1087 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1088 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1089 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1090 extern void dev_add_pack(struct packet_type *pt);
1091 extern void dev_remove_pack(struct packet_type *pt);
1092 extern void __dev_remove_pack(struct packet_type *pt);
1094 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1095 unsigned short mask);
1096 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1097 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1098 extern int dev_alloc_name(struct net_device *dev, const char *name);
1099 extern int dev_open(struct net_device *dev);
1100 extern int dev_close(struct net_device *dev);
1101 extern void dev_disable_lro(struct net_device *dev);
1102 extern int dev_queue_xmit(struct sk_buff *skb);
1103 extern int register_netdevice(struct net_device *dev);
1104 extern void unregister_netdevice(struct net_device *dev);
1105 extern void free_netdev(struct net_device *dev);
1106 extern void synchronize_net(void);
1107 extern int register_netdevice_notifier(struct notifier_block *nb);
1108 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1109 extern int init_dummy_netdev(struct net_device *dev);
1110 extern void netdev_resync_ops(struct net_device *dev);
1112 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1113 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1114 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1115 extern int dev_restart(struct net_device *dev);
1116 #ifdef CONFIG_NETPOLL_TRAP
1117 extern int netpoll_trap(void);
1119 extern int skb_gro_receive(struct sk_buff **head,
1120 struct sk_buff *skb);
1121 extern void skb_gro_reset_offset(struct sk_buff *skb);
1123 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1125 return NAPI_GRO_CB(skb)->data_offset;
1128 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1130 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1133 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1135 NAPI_GRO_CB(skb)->data_offset += len;
1138 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1139 unsigned int offset)
1141 return NAPI_GRO_CB(skb)->frag0 + offset;
1144 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1146 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1149 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1150 unsigned int offset)
1152 NAPI_GRO_CB(skb)->frag0 = NULL;
1153 NAPI_GRO_CB(skb)->frag0_len = 0;
1154 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1157 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1159 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1162 static inline void *skb_gro_network_header(struct sk_buff *skb)
1164 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1165 skb_network_offset(skb);
1168 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1169 unsigned short type,
1170 const void *daddr, const void *saddr,
1173 if (!dev->header_ops || !dev->header_ops->create)
1176 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1179 static inline int dev_parse_header(const struct sk_buff *skb,
1180 unsigned char *haddr)
1182 const struct net_device *dev = skb->dev;
1184 if (!dev->header_ops || !dev->header_ops->parse)
1186 return dev->header_ops->parse(skb, haddr);
1189 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1190 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1191 static inline int unregister_gifconf(unsigned int family)
1193 return register_gifconf(family, NULL);
1197 * Incoming packets are placed on per-cpu queues so that
1198 * no locking is needed.
1202 struct Qdisc *output_queue;
1203 struct sk_buff_head input_pkt_queue;
1204 struct list_head poll_list;
1205 struct sk_buff *completion_queue;
1207 struct napi_struct backlog;
1210 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1212 #define HAVE_NETIF_QUEUE
1214 extern void __netif_schedule(struct Qdisc *q);
1216 static inline void netif_schedule_queue(struct netdev_queue *txq)
1218 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1219 __netif_schedule(txq->qdisc);
1222 static inline void netif_tx_schedule_all(struct net_device *dev)
1226 for (i = 0; i < dev->num_tx_queues; i++)
1227 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1230 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1232 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1236 * netif_start_queue - allow transmit
1237 * @dev: network device
1239 * Allow upper layers to call the device hard_start_xmit routine.
1241 static inline void netif_start_queue(struct net_device *dev)
1243 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1246 static inline void netif_tx_start_all_queues(struct net_device *dev)
1250 for (i = 0; i < dev->num_tx_queues; i++) {
1251 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1252 netif_tx_start_queue(txq);
1256 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1258 #ifdef CONFIG_NETPOLL_TRAP
1259 if (netpoll_trap()) {
1260 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1264 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1265 __netif_schedule(dev_queue->qdisc);
1269 * netif_wake_queue - restart transmit
1270 * @dev: network device
1272 * Allow upper layers to call the device hard_start_xmit routine.
1273 * Used for flow control when transmit resources are available.
1275 static inline void netif_wake_queue(struct net_device *dev)
1277 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1280 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1284 for (i = 0; i < dev->num_tx_queues; i++) {
1285 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1286 netif_tx_wake_queue(txq);
1290 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1292 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1296 * netif_stop_queue - stop transmitted packets
1297 * @dev: network device
1299 * Stop upper layers calling the device hard_start_xmit routine.
1300 * Used for flow control when transmit resources are unavailable.
1302 static inline void netif_stop_queue(struct net_device *dev)
1304 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1307 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1311 for (i = 0; i < dev->num_tx_queues; i++) {
1312 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1313 netif_tx_stop_queue(txq);
1317 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1319 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1323 * netif_queue_stopped - test if transmit queue is flowblocked
1324 * @dev: network device
1326 * Test if transmit queue on device is currently unable to send.
1328 static inline int netif_queue_stopped(const struct net_device *dev)
1330 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1333 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1335 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1339 * netif_running - test if up
1340 * @dev: network device
1342 * Test if the device has been brought up.
1344 static inline int netif_running(const struct net_device *dev)
1346 return test_bit(__LINK_STATE_START, &dev->state);
1350 * Routines to manage the subqueues on a device. We only need start
1351 * stop, and a check if it's stopped. All other device management is
1352 * done at the overall netdevice level.
1353 * Also test the device if we're multiqueue.
1357 * netif_start_subqueue - allow sending packets on subqueue
1358 * @dev: network device
1359 * @queue_index: sub queue index
1361 * Start individual transmit queue of a device with multiple transmit queues.
1363 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1365 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1366 clear_bit(__QUEUE_STATE_XOFF, &txq->state);
1370 * netif_stop_subqueue - stop sending packets on subqueue
1371 * @dev: network device
1372 * @queue_index: sub queue index
1374 * Stop individual transmit queue of a device with multiple transmit queues.
1376 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1378 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1379 #ifdef CONFIG_NETPOLL_TRAP
1383 set_bit(__QUEUE_STATE_XOFF, &txq->state);
1387 * netif_subqueue_stopped - test status of subqueue
1388 * @dev: network device
1389 * @queue_index: sub queue index
1391 * Check individual transmit queue of a device with multiple transmit queues.
1393 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1396 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1397 return test_bit(__QUEUE_STATE_XOFF, &txq->state);
1400 static inline int netif_subqueue_stopped(const struct net_device *dev,
1401 struct sk_buff *skb)
1403 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1407 * netif_wake_subqueue - allow sending packets on subqueue
1408 * @dev: network device
1409 * @queue_index: sub queue index
1411 * Resume individual transmit queue of a device with multiple transmit queues.
1413 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1415 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1416 #ifdef CONFIG_NETPOLL_TRAP
1420 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1421 __netif_schedule(txq->qdisc);
1425 * netif_is_multiqueue - test if device has multiple transmit queues
1426 * @dev: network device
1428 * Check if device has multiple transmit queues
1430 static inline int netif_is_multiqueue(const struct net_device *dev)
1432 return (dev->num_tx_queues > 1);
1435 /* Use this variant when it is known for sure that it
1436 * is executing from hardware interrupt context or with hardware interrupts
1439 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1441 /* Use this variant in places where it could be invoked
1442 * from either hardware interrupt or other context, with hardware interrupts
1443 * either disabled or enabled.
1445 extern void dev_kfree_skb_any(struct sk_buff *skb);
1447 #define HAVE_NETIF_RX 1
1448 extern int netif_rx(struct sk_buff *skb);
1449 extern int netif_rx_ni(struct sk_buff *skb);
1450 #define HAVE_NETIF_RECEIVE_SKB 1
1451 extern int netif_receive_skb(struct sk_buff *skb);
1452 extern void napi_gro_flush(struct napi_struct *napi);
1453 extern int dev_gro_receive(struct napi_struct *napi,
1454 struct sk_buff *skb);
1455 extern int napi_skb_finish(int ret, struct sk_buff *skb);
1456 extern int napi_gro_receive(struct napi_struct *napi,
1457 struct sk_buff *skb);
1458 extern void napi_reuse_skb(struct napi_struct *napi,
1459 struct sk_buff *skb);
1460 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1461 extern int napi_frags_finish(struct napi_struct *napi,
1462 struct sk_buff *skb, int ret);
1463 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1464 extern int napi_gro_frags(struct napi_struct *napi);
1466 static inline void napi_free_frags(struct napi_struct *napi)
1468 kfree_skb(napi->skb);
1472 extern void netif_nit_deliver(struct sk_buff *skb);
1473 extern int dev_valid_name(const char *name);
1474 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1475 extern int dev_ethtool(struct net *net, struct ifreq *);
1476 extern unsigned dev_get_flags(const struct net_device *);
1477 extern int dev_change_flags(struct net_device *, unsigned);
1478 extern int dev_change_name(struct net_device *, const char *);
1479 extern int dev_set_alias(struct net_device *, const char *, size_t);
1480 extern int dev_change_net_namespace(struct net_device *,
1481 struct net *, const char *);
1482 extern int dev_set_mtu(struct net_device *, int);
1483 extern int dev_set_mac_address(struct net_device *,
1485 extern int dev_hard_start_xmit(struct sk_buff *skb,
1486 struct net_device *dev,
1487 struct netdev_queue *txq);
1489 extern int netdev_budget;
1491 /* Called by rtnetlink.c:rtnl_unlock() */
1492 extern void netdev_run_todo(void);
1495 * dev_put - release reference to device
1496 * @dev: network device
1498 * Release reference to device to allow it to be freed.
1500 static inline void dev_put(struct net_device *dev)
1502 atomic_dec(&dev->refcnt);
1506 * dev_hold - get reference to device
1507 * @dev: network device
1509 * Hold reference to device to keep it from being freed.
1511 static inline void dev_hold(struct net_device *dev)
1513 atomic_inc(&dev->refcnt);
1516 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1517 * and _off may be called from IRQ context, but it is caller
1518 * who is responsible for serialization of these calls.
1520 * The name carrier is inappropriate, these functions should really be
1521 * called netif_lowerlayer_*() because they represent the state of any
1522 * kind of lower layer not just hardware media.
1525 extern void linkwatch_fire_event(struct net_device *dev);
1528 * netif_carrier_ok - test if carrier present
1529 * @dev: network device
1531 * Check if carrier is present on device
1533 static inline int netif_carrier_ok(const struct net_device *dev)
1535 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1538 extern unsigned long dev_trans_start(struct net_device *dev);
1540 extern void __netdev_watchdog_up(struct net_device *dev);
1542 extern void netif_carrier_on(struct net_device *dev);
1544 extern void netif_carrier_off(struct net_device *dev);
1547 * netif_dormant_on - mark device as dormant.
1548 * @dev: network device
1550 * Mark device as dormant (as per RFC2863).
1552 * The dormant state indicates that the relevant interface is not
1553 * actually in a condition to pass packets (i.e., it is not 'up') but is
1554 * in a "pending" state, waiting for some external event. For "on-
1555 * demand" interfaces, this new state identifies the situation where the
1556 * interface is waiting for events to place it in the up state.
1559 static inline void netif_dormant_on(struct net_device *dev)
1561 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1562 linkwatch_fire_event(dev);
1566 * netif_dormant_off - set device as not dormant.
1567 * @dev: network device
1569 * Device is not in dormant state.
1571 static inline void netif_dormant_off(struct net_device *dev)
1573 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1574 linkwatch_fire_event(dev);
1578 * netif_dormant - test if carrier present
1579 * @dev: network device
1581 * Check if carrier is present on device
1583 static inline int netif_dormant(const struct net_device *dev)
1585 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1590 * netif_oper_up - test if device is operational
1591 * @dev: network device
1593 * Check if carrier is operational
1595 static inline int netif_oper_up(const struct net_device *dev) {
1596 return (dev->operstate == IF_OPER_UP ||
1597 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1601 * netif_device_present - is device available or removed
1602 * @dev: network device
1604 * Check if device has not been removed from system.
1606 static inline int netif_device_present(struct net_device *dev)
1608 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1611 extern void netif_device_detach(struct net_device *dev);
1613 extern void netif_device_attach(struct net_device *dev);
1616 * Network interface message level settings
1618 #define HAVE_NETIF_MSG 1
1621 NETIF_MSG_DRV = 0x0001,
1622 NETIF_MSG_PROBE = 0x0002,
1623 NETIF_MSG_LINK = 0x0004,
1624 NETIF_MSG_TIMER = 0x0008,
1625 NETIF_MSG_IFDOWN = 0x0010,
1626 NETIF_MSG_IFUP = 0x0020,
1627 NETIF_MSG_RX_ERR = 0x0040,
1628 NETIF_MSG_TX_ERR = 0x0080,
1629 NETIF_MSG_TX_QUEUED = 0x0100,
1630 NETIF_MSG_INTR = 0x0200,
1631 NETIF_MSG_TX_DONE = 0x0400,
1632 NETIF_MSG_RX_STATUS = 0x0800,
1633 NETIF_MSG_PKTDATA = 0x1000,
1634 NETIF_MSG_HW = 0x2000,
1635 NETIF_MSG_WOL = 0x4000,
1638 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1639 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1640 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1641 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1642 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1643 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1644 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1645 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1646 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1647 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1648 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1649 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1650 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1651 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1652 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1654 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1657 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1658 return default_msg_enable_bits;
1659 if (debug_value == 0) /* no output */
1661 /* set low N bits */
1662 return (1 << debug_value) - 1;
1665 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1667 spin_lock(&txq->_xmit_lock);
1668 txq->xmit_lock_owner = cpu;
1671 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1673 spin_lock_bh(&txq->_xmit_lock);
1674 txq->xmit_lock_owner = smp_processor_id();
1677 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1679 int ok = spin_trylock(&txq->_xmit_lock);
1681 txq->xmit_lock_owner = smp_processor_id();
1685 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1687 txq->xmit_lock_owner = -1;
1688 spin_unlock(&txq->_xmit_lock);
1691 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1693 txq->xmit_lock_owner = -1;
1694 spin_unlock_bh(&txq->_xmit_lock);
1697 static inline void txq_trans_update(struct netdev_queue *txq)
1699 if (txq->xmit_lock_owner != -1)
1700 txq->trans_start = jiffies;
1704 * netif_tx_lock - grab network device transmit lock
1705 * @dev: network device
1707 * Get network device transmit lock
1709 static inline void netif_tx_lock(struct net_device *dev)
1714 spin_lock(&dev->tx_global_lock);
1715 cpu = smp_processor_id();
1716 for (i = 0; i < dev->num_tx_queues; i++) {
1717 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1719 /* We are the only thread of execution doing a
1720 * freeze, but we have to grab the _xmit_lock in
1721 * order to synchronize with threads which are in
1722 * the ->hard_start_xmit() handler and already
1723 * checked the frozen bit.
1725 __netif_tx_lock(txq, cpu);
1726 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1727 __netif_tx_unlock(txq);
1731 static inline void netif_tx_lock_bh(struct net_device *dev)
1737 static inline void netif_tx_unlock(struct net_device *dev)
1741 for (i = 0; i < dev->num_tx_queues; i++) {
1742 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1744 /* No need to grab the _xmit_lock here. If the
1745 * queue is not stopped for another reason, we
1748 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1749 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1750 __netif_schedule(txq->qdisc);
1752 spin_unlock(&dev->tx_global_lock);
1755 static inline void netif_tx_unlock_bh(struct net_device *dev)
1757 netif_tx_unlock(dev);
1761 #define HARD_TX_LOCK(dev, txq, cpu) { \
1762 if ((dev->features & NETIF_F_LLTX) == 0) { \
1763 __netif_tx_lock(txq, cpu); \
1767 #define HARD_TX_UNLOCK(dev, txq) { \
1768 if ((dev->features & NETIF_F_LLTX) == 0) { \
1769 __netif_tx_unlock(txq); \
1773 static inline void netif_tx_disable(struct net_device *dev)
1779 cpu = smp_processor_id();
1780 for (i = 0; i < dev->num_tx_queues; i++) {
1781 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1783 __netif_tx_lock(txq, cpu);
1784 netif_tx_stop_queue(txq);
1785 __netif_tx_unlock(txq);
1790 static inline void netif_addr_lock(struct net_device *dev)
1792 spin_lock(&dev->addr_list_lock);
1795 static inline void netif_addr_lock_bh(struct net_device *dev)
1797 spin_lock_bh(&dev->addr_list_lock);
1800 static inline void netif_addr_unlock(struct net_device *dev)
1802 spin_unlock(&dev->addr_list_lock);
1805 static inline void netif_addr_unlock_bh(struct net_device *dev)
1807 spin_unlock_bh(&dev->addr_list_lock);
1811 * dev_addrs walker. Should be used only for read access. Call with
1812 * rcu_read_lock held.
1814 #define for_each_dev_addr(dev, ha) \
1815 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1817 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1819 extern void ether_setup(struct net_device *dev);
1821 /* Support for loadable net-drivers */
1822 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1823 void (*setup)(struct net_device *),
1824 unsigned int queue_count);
1825 #define alloc_netdev(sizeof_priv, name, setup) \
1826 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1827 extern int register_netdev(struct net_device *dev);
1828 extern void unregister_netdev(struct net_device *dev);
1830 /* Functions used for device addresses handling */
1831 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1832 unsigned char addr_type);
1833 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1834 unsigned char addr_type);
1835 extern int dev_addr_add_multiple(struct net_device *to_dev,
1836 struct net_device *from_dev,
1837 unsigned char addr_type);
1838 extern int dev_addr_del_multiple(struct net_device *to_dev,
1839 struct net_device *from_dev,
1840 unsigned char addr_type);
1842 /* Functions used for secondary unicast and multicast support */
1843 extern void dev_set_rx_mode(struct net_device *dev);
1844 extern void __dev_set_rx_mode(struct net_device *dev);
1845 extern int dev_unicast_delete(struct net_device *dev, void *addr);
1846 extern int dev_unicast_add(struct net_device *dev, void *addr);
1847 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1848 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1849 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1850 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1851 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1852 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1853 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1854 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1855 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1856 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1857 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1858 extern int dev_set_allmulti(struct net_device *dev, int inc);
1859 extern void netdev_state_change(struct net_device *dev);
1860 extern void netdev_bonding_change(struct net_device *dev);
1861 extern void netdev_features_change(struct net_device *dev);
1862 /* Load a device via the kmod */
1863 extern void dev_load(struct net *net, const char *name);
1864 extern void dev_mcast_init(void);
1865 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1867 extern int netdev_max_backlog;
1868 extern int weight_p;
1869 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1870 extern int skb_checksum_help(struct sk_buff *skb);
1871 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1873 extern void netdev_rx_csum_fault(struct net_device *dev);
1875 static inline void netdev_rx_csum_fault(struct net_device *dev)
1879 /* rx skb timestamps */
1880 extern void net_enable_timestamp(void);
1881 extern void net_disable_timestamp(void);
1883 #ifdef CONFIG_PROC_FS
1884 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1885 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1886 extern void dev_seq_stop(struct seq_file *seq, void *v);
1889 extern int netdev_class_create_file(struct class_attribute *class_attr);
1890 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1892 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1894 extern void linkwatch_run_queue(void);
1896 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1897 unsigned long mask);
1898 unsigned long netdev_fix_features(unsigned long features, const char *name);
1900 static inline int net_gso_ok(int features, int gso_type)
1902 int feature = gso_type << NETIF_F_GSO_SHIFT;
1903 return (features & feature) == feature;
1906 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1908 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1909 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1912 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1914 return skb_is_gso(skb) &&
1915 (!skb_gso_ok(skb, dev->features) ||
1916 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1919 static inline void netif_set_gso_max_size(struct net_device *dev,
1922 dev->gso_max_size = size;
1925 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
1926 struct net_device *master)
1928 if (skb->pkt_type == PACKET_HOST) {
1929 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
1931 memcpy(dest, master->dev_addr, ETH_ALEN);
1935 /* On bonding slaves other than the currently active slave, suppress
1936 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1937 * ARP on active-backup slaves with arp_validate enabled.
1939 static inline int skb_bond_should_drop(struct sk_buff *skb)
1941 struct net_device *dev = skb->dev;
1942 struct net_device *master = dev->master;
1945 if (master->priv_flags & IFF_MASTER_ARPMON)
1946 dev->last_rx = jiffies;
1948 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
1949 /* Do address unmangle. The local destination address
1950 * will be always the one master has. Provides the right
1951 * functionality in a bridge.
1953 skb_bond_set_mac_by_master(skb, master);
1956 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1957 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1958 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1961 if (master->priv_flags & IFF_MASTER_ALB) {
1962 if (skb->pkt_type != PACKET_BROADCAST &&
1963 skb->pkt_type != PACKET_MULTICAST)
1966 if (master->priv_flags & IFF_MASTER_8023AD &&
1967 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
1976 extern struct pernet_operations __net_initdata loopback_net_ops;
1978 static inline int dev_ethtool_get_settings(struct net_device *dev,
1979 struct ethtool_cmd *cmd)
1981 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1983 return dev->ethtool_ops->get_settings(dev, cmd);
1986 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
1988 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
1990 return dev->ethtool_ops->get_rx_csum(dev);
1993 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
1995 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
1997 return dev->ethtool_ops->get_flags(dev);
1999 #endif /* __KERNEL__ */
2001 #endif /* _LINUX_NETDEVICE_H */