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)
82 /* Driver transmit return codes */
84 NETDEV_TX_OK = 0, /* driver took care of packet */
85 NETDEV_TX_BUSY, /* driver tx path was busy*/
86 NETDEV_TX_LOCKED = -1, /* driver tx lock was already taken */
88 typedef enum netdev_tx netdev_tx_t;
92 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
96 * Compute the worst case header length according to the protocols
100 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
101 # if defined(CONFIG_MAC80211_MESH)
102 # define LL_MAX_HEADER 128
104 # define LL_MAX_HEADER 96
106 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
107 # define LL_MAX_HEADER 48
109 # define LL_MAX_HEADER 32
112 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
113 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
114 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
115 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
116 #define MAX_HEADER LL_MAX_HEADER
118 #define MAX_HEADER (LL_MAX_HEADER + 48)
121 #endif /* __KERNEL__ */
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
128 struct net_device_stats {
129 unsigned long rx_packets; /* total packets received */
130 unsigned long tx_packets; /* total packets transmitted */
131 unsigned long rx_bytes; /* total bytes received */
132 unsigned long tx_bytes; /* total bytes transmitted */
133 unsigned long rx_errors; /* bad packets received */
134 unsigned long tx_errors; /* packet transmit problems */
135 unsigned long rx_dropped; /* no space in linux buffers */
136 unsigned long tx_dropped; /* no space available in linux */
137 unsigned long multicast; /* multicast packets received */
138 unsigned long collisions;
140 /* detailed rx_errors: */
141 unsigned long rx_length_errors;
142 unsigned long rx_over_errors; /* receiver ring buff overflow */
143 unsigned long rx_crc_errors; /* recved pkt with crc error */
144 unsigned long rx_frame_errors; /* recv'd frame alignment error */
145 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
146 unsigned long rx_missed_errors; /* receiver missed packet */
148 /* detailed tx_errors */
149 unsigned long tx_aborted_errors;
150 unsigned long tx_carrier_errors;
151 unsigned long tx_fifo_errors;
152 unsigned long tx_heartbeat_errors;
153 unsigned long tx_window_errors;
156 unsigned long rx_compressed;
157 unsigned long tx_compressed;
161 /* Media selection options. */
174 #include <linux/cache.h>
175 #include <linux/skbuff.h>
181 struct netif_rx_stats {
184 unsigned time_squeeze;
185 unsigned cpu_collision;
188 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
190 struct dev_addr_list {
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
209 struct netdev_hw_addr {
210 struct list_head list;
211 unsigned char addr[MAX_ADDR_LEN];
213 #define NETDEV_HW_ADDR_T_LAN 1
214 #define NETDEV_HW_ADDR_T_SAN 2
215 #define NETDEV_HW_ADDR_T_SLAVE 3
216 #define NETDEV_HW_ADDR_T_UNICAST 4
219 struct rcu_head rcu_head;
222 struct netdev_hw_addr_list {
223 struct list_head list;
228 struct hh_cache *hh_next; /* Next entry */
229 atomic_t hh_refcnt; /* number of users */
231 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
233 * They are mostly read, but hh_refcnt may be changed quite frequently,
234 * incurring cache line ping pongs.
236 __be16 hh_type ____cacheline_aligned_in_smp;
237 /* protocol identifier, f.e ETH_P_IP
238 * NOTE: For VLANs, this will be the
239 * encapuslated type. --BLG
241 u16 hh_len; /* length of header */
242 int (*hh_output)(struct sk_buff *skb);
245 /* cached hardware header; allow for machine alignment needs. */
246 #define HH_DATA_MOD 16
247 #define HH_DATA_OFF(__len) \
248 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
249 #define HH_DATA_ALIGN(__len) \
250 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
251 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
254 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
256 * dev->hard_header_len ? (dev->hard_header_len +
257 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
259 * We could use other alignment values, but we must maintain the
260 * relationship HH alignment <= LL alignment.
262 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
265 #define LL_RESERVED_SPACE(dev) \
266 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
268 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
269 #define LL_ALLOCATED_SPACE(dev) \
270 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
273 int (*create) (struct sk_buff *skb, struct net_device *dev,
274 unsigned short type, const void *daddr,
275 const void *saddr, unsigned len);
276 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
277 int (*rebuild)(struct sk_buff *skb);
278 #define HAVE_HEADER_CACHE
279 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
280 void (*cache_update)(struct hh_cache *hh,
281 const struct net_device *dev,
282 const unsigned char *haddr);
285 /* These flag bits are private to the generic network queueing
286 * layer, they may not be explicitly referenced by any other
290 enum netdev_state_t {
292 __LINK_STATE_PRESENT,
293 __LINK_STATE_NOCARRIER,
294 __LINK_STATE_LINKWATCH_PENDING,
295 __LINK_STATE_DORMANT,
300 * This structure holds at boot time configured netdevice settings. They
301 * are then used in the device probing.
303 struct netdev_boot_setup {
307 #define NETDEV_BOOT_SETUP_MAX 8
309 extern int __init netdev_boot_setup(char *str);
312 * Structure for NAPI scheduling similar to tasklet but with weighting
315 /* The poll_list must only be managed by the entity which
316 * changes the state of the NAPI_STATE_SCHED bit. This means
317 * whoever atomically sets that bit can add this napi_struct
318 * to the per-cpu poll_list, and whoever clears that bit
319 * can remove from the list right before clearing the bit.
321 struct list_head poll_list;
325 int (*poll)(struct napi_struct *, int);
326 #ifdef CONFIG_NETPOLL
327 spinlock_t poll_lock;
331 unsigned int gro_count;
333 struct net_device *dev;
334 struct list_head dev_list;
335 struct sk_buff *gro_list;
340 NAPI_STATE_SCHED, /* Poll is scheduled */
341 NAPI_STATE_DISABLE, /* Disable pending */
342 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
352 typedef enum gro_result gro_result_t;
354 extern void __napi_schedule(struct napi_struct *n);
356 static inline int napi_disable_pending(struct napi_struct *n)
358 return test_bit(NAPI_STATE_DISABLE, &n->state);
362 * napi_schedule_prep - check if napi can be scheduled
365 * Test if NAPI routine is already running, and if not mark
366 * it as running. This is used as a condition variable
367 * insure only one NAPI poll instance runs. We also make
368 * sure there is no pending NAPI disable.
370 static inline int napi_schedule_prep(struct napi_struct *n)
372 return !napi_disable_pending(n) &&
373 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
377 * napi_schedule - schedule NAPI poll
380 * Schedule NAPI poll routine to be called if it is not already
383 static inline void napi_schedule(struct napi_struct *n)
385 if (napi_schedule_prep(n))
389 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
390 static inline int napi_reschedule(struct napi_struct *napi)
392 if (napi_schedule_prep(napi)) {
393 __napi_schedule(napi);
400 * napi_complete - NAPI processing complete
403 * Mark NAPI processing as complete.
405 extern void __napi_complete(struct napi_struct *n);
406 extern void napi_complete(struct napi_struct *n);
409 * napi_disable - prevent NAPI from scheduling
412 * Stop NAPI from being scheduled on this context.
413 * Waits till any outstanding processing completes.
415 static inline void napi_disable(struct napi_struct *n)
417 set_bit(NAPI_STATE_DISABLE, &n->state);
418 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
420 clear_bit(NAPI_STATE_DISABLE, &n->state);
424 * napi_enable - enable NAPI scheduling
427 * Resume NAPI from being scheduled on this context.
428 * Must be paired with napi_disable.
430 static inline void napi_enable(struct napi_struct *n)
432 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
433 smp_mb__before_clear_bit();
434 clear_bit(NAPI_STATE_SCHED, &n->state);
439 * napi_synchronize - wait until NAPI is not running
442 * Wait until NAPI is done being scheduled on this context.
443 * Waits till any outstanding processing completes but
444 * does not disable future activations.
446 static inline void napi_synchronize(const struct napi_struct *n)
448 while (test_bit(NAPI_STATE_SCHED, &n->state))
452 # define napi_synchronize(n) barrier()
455 enum netdev_queue_state_t {
457 __QUEUE_STATE_FROZEN,
460 struct netdev_queue {
464 struct net_device *dev;
467 struct Qdisc *qdisc_sleeping;
471 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
474 * please use this field instead of dev->trans_start
476 unsigned long trans_start;
477 unsigned long tx_bytes;
478 unsigned long tx_packets;
479 unsigned long tx_dropped;
480 } ____cacheline_aligned_in_smp;
484 * This structure defines the management hooks for network devices.
485 * The following hooks can be defined; unless noted otherwise, they are
486 * optional and can be filled with a null pointer.
488 * int (*ndo_init)(struct net_device *dev);
489 * This function is called once when network device is registered.
490 * The network device can use this to any late stage initializaton
491 * or semantic validattion. It can fail with an error code which will
492 * be propogated back to register_netdev
494 * void (*ndo_uninit)(struct net_device *dev);
495 * This function is called when device is unregistered or when registration
496 * fails. It is not called if init fails.
498 * int (*ndo_open)(struct net_device *dev);
499 * This function is called when network device transistions to the up
502 * int (*ndo_stop)(struct net_device *dev);
503 * This function is called when network device transistions to the down
506 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
507 * struct net_device *dev);
508 * Called when a packet needs to be transmitted.
509 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
510 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
511 * Required can not be NULL.
513 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
514 * Called to decide which queue to when device supports multiple
517 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
518 * This function is called to allow device receiver to make
519 * changes to configuration when multicast or promiscious is enabled.
521 * void (*ndo_set_rx_mode)(struct net_device *dev);
522 * This function is called device changes address list filtering.
524 * void (*ndo_set_multicast_list)(struct net_device *dev);
525 * This function is called when the multicast address list changes.
527 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
528 * This function is called when the Media Access Control address
529 * needs to be changed. If this interface is not defined, the
530 * mac address can not be changed.
532 * int (*ndo_validate_addr)(struct net_device *dev);
533 * Test if Media Access Control address is valid for the device.
535 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
536 * Called when a user request an ioctl which can't be handled by
537 * the generic interface code. If not defined ioctl's return
538 * not supported error code.
540 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
541 * Used to set network devices bus interface parameters. This interface
542 * is retained for legacy reason, new devices should use the bus
543 * interface (PCI) for low level management.
545 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
546 * Called when a user wants to change the Maximum Transfer Unit
547 * of a device. If not defined, any request to change MTU will
548 * will return an error.
550 * void (*ndo_tx_timeout)(struct net_device *dev);
551 * Callback uses when the transmitter has not made any progress
552 * for dev->watchdog ticks.
554 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
555 * Called when a user wants to get the network device usage
556 * statistics. If not defined, the counters in dev->stats will
559 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
560 * If device support VLAN receive accleration
561 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
562 * when vlan groups for the device changes. Note: grp is NULL
563 * if no vlan's groups are being used.
565 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
566 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
567 * this function is called when a VLAN id is registered.
569 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
570 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
571 * this function is called when a VLAN id is unregistered.
573 * void (*ndo_poll_controller)(struct net_device *dev);
575 #define HAVE_NET_DEVICE_OPS
576 struct net_device_ops {
577 int (*ndo_init)(struct net_device *dev);
578 void (*ndo_uninit)(struct net_device *dev);
579 int (*ndo_open)(struct net_device *dev);
580 int (*ndo_stop)(struct net_device *dev);
581 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
582 struct net_device *dev);
583 u16 (*ndo_select_queue)(struct net_device *dev,
584 struct sk_buff *skb);
585 #define HAVE_CHANGE_RX_FLAGS
586 void (*ndo_change_rx_flags)(struct net_device *dev,
588 #define HAVE_SET_RX_MODE
589 void (*ndo_set_rx_mode)(struct net_device *dev);
590 #define HAVE_MULTICAST
591 void (*ndo_set_multicast_list)(struct net_device *dev);
592 #define HAVE_SET_MAC_ADDR
593 int (*ndo_set_mac_address)(struct net_device *dev,
595 #define HAVE_VALIDATE_ADDR
596 int (*ndo_validate_addr)(struct net_device *dev);
597 #define HAVE_PRIVATE_IOCTL
598 int (*ndo_do_ioctl)(struct net_device *dev,
599 struct ifreq *ifr, int cmd);
600 #define HAVE_SET_CONFIG
601 int (*ndo_set_config)(struct net_device *dev,
603 #define HAVE_CHANGE_MTU
604 int (*ndo_change_mtu)(struct net_device *dev,
606 int (*ndo_neigh_setup)(struct net_device *dev,
607 struct neigh_parms *);
608 #define HAVE_TX_TIMEOUT
609 void (*ndo_tx_timeout) (struct net_device *dev);
611 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
613 void (*ndo_vlan_rx_register)(struct net_device *dev,
614 struct vlan_group *grp);
615 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
617 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
619 #ifdef CONFIG_NET_POLL_CONTROLLER
620 #define HAVE_NETDEV_POLL
621 void (*ndo_poll_controller)(struct net_device *dev);
623 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
624 int (*ndo_fcoe_enable)(struct net_device *dev);
625 int (*ndo_fcoe_disable)(struct net_device *dev);
626 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
628 struct scatterlist *sgl,
630 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
632 #define NETDEV_FCOE_WWNN 0
633 #define NETDEV_FCOE_WWPN 1
634 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
640 * The DEVICE structure.
641 * Actually, this whole structure is a big mistake. It mixes I/O
642 * data with strictly "high-level" data, and it has to know about
643 * almost every data structure used in the INET module.
645 * FIXME: cleanup struct net_device such that network protocol info
652 * This is the first field of the "visible" part of this structure
653 * (i.e. as seen by users in the "Space.c" file). It is the name
657 /* device name hash chain */
658 struct hlist_node name_hlist;
663 * I/O specific fields
664 * FIXME: Merge these and struct ifmap into one
666 unsigned long mem_end; /* shared mem end */
667 unsigned long mem_start; /* shared mem start */
668 unsigned long base_addr; /* device I/O address */
669 unsigned int irq; /* device IRQ number */
672 * Some hardware also needs these fields, but they are not
673 * part of the usual set specified in Space.c.
676 unsigned char if_port; /* Selectable AUI, TP,..*/
677 unsigned char dma; /* DMA channel */
681 struct list_head dev_list;
682 struct list_head napi_list;
683 struct list_head unreg_list;
685 /* Net device features */
686 unsigned long features;
687 #define NETIF_F_SG 1 /* Scatter/gather IO. */
688 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
689 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
690 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
691 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
692 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
693 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
694 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
695 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
696 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
697 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
698 #define NETIF_F_GSO 2048 /* Enable software GSO. */
699 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
700 /* do not use LLTX in new drivers */
701 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
702 #define NETIF_F_GRO 16384 /* Generic receive offload */
703 #define NETIF_F_LRO 32768 /* large receive offload */
705 /* the GSO_MASK reserves bits 16 through 23 */
706 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
707 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
708 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
710 /* Segmentation offload features */
711 #define NETIF_F_GSO_SHIFT 16
712 #define NETIF_F_GSO_MASK 0x00ff0000
713 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
714 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
715 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
716 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
717 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
718 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
720 /* List of features with software fallbacks. */
721 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
724 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
725 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
726 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
727 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
730 * If one device supports one of these features, then enable them
731 * for all in netdev_increment_features.
733 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
734 NETIF_F_SG | NETIF_F_HIGHDMA | \
737 /* Interface index. Unique device identifier */
741 struct net_device_stats stats;
743 #ifdef CONFIG_WIRELESS_EXT
744 /* List of functions to handle Wireless Extensions (instead of ioctl).
745 * See <net/iw_handler.h> for details. Jean II */
746 const struct iw_handler_def * wireless_handlers;
747 /* Instance data managed by the core of Wireless Extensions. */
748 struct iw_public_data * wireless_data;
750 /* Management operations */
751 const struct net_device_ops *netdev_ops;
752 const struct ethtool_ops *ethtool_ops;
754 /* Hardware header description */
755 const struct header_ops *header_ops;
757 unsigned int flags; /* interface flags (a la BSD) */
758 unsigned short gflags;
759 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
760 unsigned short padded; /* How much padding added by alloc_netdev() */
762 unsigned char operstate; /* RFC2863 operstate */
763 unsigned char link_mode; /* mapping policy to operstate */
765 unsigned mtu; /* interface MTU value */
766 unsigned short type; /* interface hardware type */
767 unsigned short hard_header_len; /* hardware hdr length */
769 /* extra head- and tailroom the hardware may need, but not in all cases
770 * can this be guaranteed, especially tailroom. Some cases also use
771 * LL_MAX_HEADER instead to allocate the skb.
773 unsigned short needed_headroom;
774 unsigned short needed_tailroom;
776 struct net_device *master; /* Pointer to master device of a group,
777 * which this device is member of.
780 /* Interface address info. */
781 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
782 unsigned char addr_len; /* hardware address length */
783 unsigned short dev_id; /* for shared network cards */
785 struct netdev_hw_addr_list uc; /* Secondary unicast
788 spinlock_t addr_list_lock;
789 struct dev_addr_list *mc_list; /* Multicast mac addresses */
790 int mc_count; /* Number of installed mcasts */
791 unsigned int promiscuity;
792 unsigned int allmulti;
795 /* Protocol specific pointers */
797 #ifdef CONFIG_NET_DSA
798 void *dsa_ptr; /* dsa specific data */
800 void *atalk_ptr; /* AppleTalk link */
801 void *ip_ptr; /* IPv4 specific data */
802 void *dn_ptr; /* DECnet specific data */
803 void *ip6_ptr; /* IPv6 specific data */
804 void *ec_ptr; /* Econet specific data */
805 void *ax25_ptr; /* AX.25 specific data */
806 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
807 assign before registering */
810 * Cache line mostly used on receive path (including eth_type_trans())
812 unsigned long last_rx; /* Time of last Rx */
813 /* Interface address info used in eth_type_trans() */
814 unsigned char *dev_addr; /* hw address, (before bcast
815 because most packets are
818 struct netdev_hw_addr_list dev_addrs; /* list of device
821 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
823 struct netdev_queue rx_queue;
825 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
827 /* Number of TX queues allocated at alloc_netdev_mq() time */
828 unsigned int num_tx_queues;
830 /* Number of TX queues currently active in device */
831 unsigned int real_num_tx_queues;
833 /* root qdisc from userspace point of view */
836 unsigned long tx_queue_len; /* Max frames per queue allowed */
837 spinlock_t tx_global_lock;
839 * One part is mostly used on xmit path (device)
841 /* These may be needed for future network-power-down code. */
844 * trans_start here is expensive for high speed devices on SMP,
845 * please use netdev_queue->trans_start instead.
847 unsigned long trans_start; /* Time (in jiffies) of last Tx */
849 int watchdog_timeo; /* used by dev_watchdog() */
850 struct timer_list watchdog_timer;
852 /* Number of references to this device */
853 atomic_t refcnt ____cacheline_aligned_in_smp;
855 /* delayed register/unregister */
856 struct list_head todo_list;
857 /* device index hash chain */
858 struct hlist_node index_hlist;
860 struct net_device *link_watch_next;
862 /* register/unregister state machine */
863 enum { NETREG_UNINITIALIZED=0,
864 NETREG_REGISTERED, /* completed register_netdevice */
865 NETREG_UNREGISTERING, /* called unregister_netdevice */
866 NETREG_UNREGISTERED, /* completed unregister todo */
867 NETREG_RELEASED, /* called free_netdev */
868 NETREG_DUMMY, /* dummy device for NAPI poll */
871 /* Called from unregister, can be used to call free_netdev */
872 void (*destructor)(struct net_device *dev);
874 #ifdef CONFIG_NETPOLL
875 struct netpoll_info *npinfo;
879 /* Network namespace this network device is inside */
883 /* mid-layer private */
887 struct net_bridge_port *br_port;
889 struct macvlan_port *macvlan_port;
891 struct garp_port *garp_port;
893 /* class/net/name entry */
895 /* space for optional device, statistics, and wireless sysfs groups */
896 const struct attribute_group *sysfs_groups[4];
898 /* rtnetlink link ops */
899 const struct rtnl_link_ops *rtnl_link_ops;
901 /* VLAN feature mask */
902 unsigned long vlan_features;
904 /* for setting kernel sock attribute on TCP connection setup */
905 #define GSO_MAX_SIZE 65536
906 unsigned int gso_max_size;
909 /* Data Center Bridging netlink ops */
910 const struct dcbnl_rtnl_ops *dcbnl_ops;
913 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
914 /* max exchange id for FCoE LRO by ddp */
915 unsigned int fcoe_ddp_xid;
918 #define to_net_dev(d) container_of(d, struct net_device, dev)
920 #define NETDEV_ALIGN 32
923 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
926 return &dev->_tx[index];
929 static inline void netdev_for_each_tx_queue(struct net_device *dev,
930 void (*f)(struct net_device *,
931 struct netdev_queue *,
937 for (i = 0; i < dev->num_tx_queues; i++)
938 f(dev, &dev->_tx[i], arg);
942 * Net namespace inlines
945 struct net *dev_net(const struct net_device *dev)
955 void dev_net_set(struct net_device *dev, struct net *net)
958 release_net(dev->nd_net);
959 dev->nd_net = hold_net(net);
963 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
965 #ifdef CONFIG_NET_DSA_TAG_DSA
966 if (dev->dsa_ptr != NULL)
967 return dsa_uses_dsa_tags(dev->dsa_ptr);
973 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
975 #ifdef CONFIG_NET_DSA_TAG_TRAILER
976 if (dev->dsa_ptr != NULL)
977 return dsa_uses_trailer_tags(dev->dsa_ptr);
984 * netdev_priv - access network device private data
985 * @dev: network device
987 * Get network device private data
989 static inline void *netdev_priv(const struct net_device *dev)
991 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
994 /* Set the sysfs physical device reference for the network logical device
995 * if set prior to registration will cause a symlink during initialization.
997 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
999 /* Set the sysfs device type for the network logical device to allow
1000 * fin grained indentification of different network device types. For
1001 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1003 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1006 * netif_napi_add - initialize a napi context
1007 * @dev: network device
1008 * @napi: napi context
1009 * @poll: polling function
1010 * @weight: default weight
1012 * netif_napi_add() must be used to initialize a napi context prior to calling
1013 * *any* of the other napi related functions.
1015 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1016 int (*poll)(struct napi_struct *, int), int weight);
1019 * netif_napi_del - remove a napi context
1020 * @napi: napi context
1022 * netif_napi_del() removes a napi context from the network device napi list
1024 void netif_napi_del(struct napi_struct *napi);
1026 struct napi_gro_cb {
1027 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1030 /* Length of frag0. */
1031 unsigned int frag0_len;
1033 /* This indicates where we are processing relative to skb->data. */
1036 /* This is non-zero if the packet may be of the same flow. */
1039 /* This is non-zero if the packet cannot be merged with the new skb. */
1042 /* Number of segments aggregated. */
1049 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1051 struct packet_type {
1052 __be16 type; /* This is really htons(ether_type). */
1053 struct net_device *dev; /* NULL is wildcarded here */
1054 int (*func) (struct sk_buff *,
1055 struct net_device *,
1056 struct packet_type *,
1057 struct net_device *);
1058 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1060 int (*gso_send_check)(struct sk_buff *skb);
1061 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1062 struct sk_buff *skb);
1063 int (*gro_complete)(struct sk_buff *skb);
1064 void *af_packet_priv;
1065 struct list_head list;
1068 #include <linux/interrupt.h>
1069 #include <linux/notifier.h>
1071 extern rwlock_t dev_base_lock; /* Device list lock */
1074 #define for_each_netdev(net, d) \
1075 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1076 #define for_each_netdev_rcu(net, d) \
1077 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1078 #define for_each_netdev_safe(net, d, n) \
1079 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1080 #define for_each_netdev_continue(net, d) \
1081 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1082 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1084 static inline struct net_device *next_net_device(struct net_device *dev)
1086 struct list_head *lh;
1090 lh = dev->dev_list.next;
1091 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1094 static inline struct net_device *first_net_device(struct net *net)
1096 return list_empty(&net->dev_base_head) ? NULL :
1097 net_device_entry(net->dev_base_head.next);
1100 extern int netdev_boot_setup_check(struct net_device *dev);
1101 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1102 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1103 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1104 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1105 extern void dev_add_pack(struct packet_type *pt);
1106 extern void dev_remove_pack(struct packet_type *pt);
1107 extern void __dev_remove_pack(struct packet_type *pt);
1109 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1110 unsigned short mask);
1111 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1112 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1113 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1114 extern int dev_alloc_name(struct net_device *dev, const char *name);
1115 extern int dev_open(struct net_device *dev);
1116 extern int dev_close(struct net_device *dev);
1117 extern void dev_disable_lro(struct net_device *dev);
1118 extern int dev_queue_xmit(struct sk_buff *skb);
1119 extern int register_netdevice(struct net_device *dev);
1120 extern void unregister_netdevice_queue(struct net_device *dev,
1121 struct list_head *head);
1122 extern void unregister_netdevice_many(struct list_head *head);
1123 static inline void unregister_netdevice(struct net_device *dev)
1125 unregister_netdevice_queue(dev, NULL);
1128 extern void free_netdev(struct net_device *dev);
1129 extern void synchronize_net(void);
1130 extern int register_netdevice_notifier(struct notifier_block *nb);
1131 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1132 extern int init_dummy_netdev(struct net_device *dev);
1133 extern void netdev_resync_ops(struct net_device *dev);
1135 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1136 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1137 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1138 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1139 extern int dev_restart(struct net_device *dev);
1140 #ifdef CONFIG_NETPOLL_TRAP
1141 extern int netpoll_trap(void);
1143 extern int skb_gro_receive(struct sk_buff **head,
1144 struct sk_buff *skb);
1145 extern void skb_gro_reset_offset(struct sk_buff *skb);
1147 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1149 return NAPI_GRO_CB(skb)->data_offset;
1152 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1154 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1157 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1159 NAPI_GRO_CB(skb)->data_offset += len;
1162 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1163 unsigned int offset)
1165 return NAPI_GRO_CB(skb)->frag0 + offset;
1168 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1170 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1173 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1174 unsigned int offset)
1176 NAPI_GRO_CB(skb)->frag0 = NULL;
1177 NAPI_GRO_CB(skb)->frag0_len = 0;
1178 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1181 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1183 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1186 static inline void *skb_gro_network_header(struct sk_buff *skb)
1188 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1189 skb_network_offset(skb);
1192 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1193 unsigned short type,
1194 const void *daddr, const void *saddr,
1197 if (!dev->header_ops || !dev->header_ops->create)
1200 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1203 static inline int dev_parse_header(const struct sk_buff *skb,
1204 unsigned char *haddr)
1206 const struct net_device *dev = skb->dev;
1208 if (!dev->header_ops || !dev->header_ops->parse)
1210 return dev->header_ops->parse(skb, haddr);
1213 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1214 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1215 static inline int unregister_gifconf(unsigned int family)
1217 return register_gifconf(family, NULL);
1221 * Incoming packets are placed on per-cpu queues so that
1222 * no locking is needed.
1224 struct softnet_data {
1225 struct Qdisc *output_queue;
1226 struct sk_buff_head input_pkt_queue;
1227 struct list_head poll_list;
1228 struct sk_buff *completion_queue;
1230 struct napi_struct backlog;
1233 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1235 #define HAVE_NETIF_QUEUE
1237 extern void __netif_schedule(struct Qdisc *q);
1239 static inline void netif_schedule_queue(struct netdev_queue *txq)
1241 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1242 __netif_schedule(txq->qdisc);
1245 static inline void netif_tx_schedule_all(struct net_device *dev)
1249 for (i = 0; i < dev->num_tx_queues; i++)
1250 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1253 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1255 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1259 * netif_start_queue - allow transmit
1260 * @dev: network device
1262 * Allow upper layers to call the device hard_start_xmit routine.
1264 static inline void netif_start_queue(struct net_device *dev)
1266 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1269 static inline void netif_tx_start_all_queues(struct net_device *dev)
1273 for (i = 0; i < dev->num_tx_queues; i++) {
1274 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1275 netif_tx_start_queue(txq);
1279 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1281 #ifdef CONFIG_NETPOLL_TRAP
1282 if (netpoll_trap()) {
1283 netif_tx_start_queue(dev_queue);
1287 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1288 __netif_schedule(dev_queue->qdisc);
1292 * netif_wake_queue - restart transmit
1293 * @dev: network device
1295 * Allow upper layers to call the device hard_start_xmit routine.
1296 * Used for flow control when transmit resources are available.
1298 static inline void netif_wake_queue(struct net_device *dev)
1300 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1303 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1307 for (i = 0; i < dev->num_tx_queues; i++) {
1308 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1309 netif_tx_wake_queue(txq);
1313 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1315 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1319 * netif_stop_queue - stop transmitted packets
1320 * @dev: network device
1322 * Stop upper layers calling the device hard_start_xmit routine.
1323 * Used for flow control when transmit resources are unavailable.
1325 static inline void netif_stop_queue(struct net_device *dev)
1327 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1330 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1334 for (i = 0; i < dev->num_tx_queues; i++) {
1335 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1336 netif_tx_stop_queue(txq);
1340 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1342 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1346 * netif_queue_stopped - test if transmit queue is flowblocked
1347 * @dev: network device
1349 * Test if transmit queue on device is currently unable to send.
1351 static inline int netif_queue_stopped(const struct net_device *dev)
1353 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1356 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1358 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1362 * netif_running - test if up
1363 * @dev: network device
1365 * Test if the device has been brought up.
1367 static inline int netif_running(const struct net_device *dev)
1369 return test_bit(__LINK_STATE_START, &dev->state);
1373 * Routines to manage the subqueues on a device. We only need start
1374 * stop, and a check if it's stopped. All other device management is
1375 * done at the overall netdevice level.
1376 * Also test the device if we're multiqueue.
1380 * netif_start_subqueue - allow sending packets on subqueue
1381 * @dev: network device
1382 * @queue_index: sub queue index
1384 * Start individual transmit queue of a device with multiple transmit queues.
1386 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1388 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1390 netif_tx_start_queue(txq);
1394 * netif_stop_subqueue - stop sending packets on subqueue
1395 * @dev: network device
1396 * @queue_index: sub queue index
1398 * Stop individual transmit queue of a device with multiple transmit queues.
1400 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1402 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1403 #ifdef CONFIG_NETPOLL_TRAP
1407 netif_tx_stop_queue(txq);
1411 * netif_subqueue_stopped - test status of subqueue
1412 * @dev: network device
1413 * @queue_index: sub queue index
1415 * Check individual transmit queue of a device with multiple transmit queues.
1417 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1420 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1422 return netif_tx_queue_stopped(txq);
1425 static inline int netif_subqueue_stopped(const struct net_device *dev,
1426 struct sk_buff *skb)
1428 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1432 * netif_wake_subqueue - allow sending packets on subqueue
1433 * @dev: network device
1434 * @queue_index: sub queue index
1436 * Resume individual transmit queue of a device with multiple transmit queues.
1438 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1440 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1441 #ifdef CONFIG_NETPOLL_TRAP
1445 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1446 __netif_schedule(txq->qdisc);
1450 * netif_is_multiqueue - test if device has multiple transmit queues
1451 * @dev: network device
1453 * Check if device has multiple transmit queues
1455 static inline int netif_is_multiqueue(const struct net_device *dev)
1457 return (dev->num_tx_queues > 1);
1460 /* Use this variant when it is known for sure that it
1461 * is executing from hardware interrupt context or with hardware interrupts
1464 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1466 /* Use this variant in places where it could be invoked
1467 * from either hardware interrupt or other context, with hardware interrupts
1468 * either disabled or enabled.
1470 extern void dev_kfree_skb_any(struct sk_buff *skb);
1472 #define HAVE_NETIF_RX 1
1473 extern int netif_rx(struct sk_buff *skb);
1474 extern int netif_rx_ni(struct sk_buff *skb);
1475 #define HAVE_NETIF_RECEIVE_SKB 1
1476 extern int netif_receive_skb(struct sk_buff *skb);
1477 extern void napi_gro_flush(struct napi_struct *napi);
1478 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1479 struct sk_buff *skb);
1480 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1481 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1482 struct sk_buff *skb);
1483 extern void napi_reuse_skb(struct napi_struct *napi,
1484 struct sk_buff *skb);
1485 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1486 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1487 struct sk_buff *skb,
1489 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1490 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1492 static inline void napi_free_frags(struct napi_struct *napi)
1494 kfree_skb(napi->skb);
1498 extern void netif_nit_deliver(struct sk_buff *skb);
1499 extern int dev_valid_name(const char *name);
1500 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1501 extern int dev_ethtool(struct net *net, struct ifreq *);
1502 extern unsigned dev_get_flags(const struct net_device *);
1503 extern int dev_change_flags(struct net_device *, unsigned);
1504 extern int dev_change_name(struct net_device *, const char *);
1505 extern int dev_set_alias(struct net_device *, const char *, size_t);
1506 extern int dev_change_net_namespace(struct net_device *,
1507 struct net *, const char *);
1508 extern int dev_set_mtu(struct net_device *, int);
1509 extern int dev_set_mac_address(struct net_device *,
1511 extern int dev_hard_start_xmit(struct sk_buff *skb,
1512 struct net_device *dev,
1513 struct netdev_queue *txq);
1515 extern int netdev_budget;
1517 /* Called by rtnetlink.c:rtnl_unlock() */
1518 extern void netdev_run_todo(void);
1521 * dev_put - release reference to device
1522 * @dev: network device
1524 * Release reference to device to allow it to be freed.
1526 static inline void dev_put(struct net_device *dev)
1528 atomic_dec(&dev->refcnt);
1532 * dev_hold - get reference to device
1533 * @dev: network device
1535 * Hold reference to device to keep it from being freed.
1537 static inline void dev_hold(struct net_device *dev)
1539 atomic_inc(&dev->refcnt);
1542 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1543 * and _off may be called from IRQ context, but it is caller
1544 * who is responsible for serialization of these calls.
1546 * The name carrier is inappropriate, these functions should really be
1547 * called netif_lowerlayer_*() because they represent the state of any
1548 * kind of lower layer not just hardware media.
1551 extern void linkwatch_fire_event(struct net_device *dev);
1554 * netif_carrier_ok - test if carrier present
1555 * @dev: network device
1557 * Check if carrier is present on device
1559 static inline int netif_carrier_ok(const struct net_device *dev)
1561 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1564 extern unsigned long dev_trans_start(struct net_device *dev);
1566 extern void __netdev_watchdog_up(struct net_device *dev);
1568 extern void netif_carrier_on(struct net_device *dev);
1570 extern void netif_carrier_off(struct net_device *dev);
1573 * netif_dormant_on - mark device as dormant.
1574 * @dev: network device
1576 * Mark device as dormant (as per RFC2863).
1578 * The dormant state indicates that the relevant interface is not
1579 * actually in a condition to pass packets (i.e., it is not 'up') but is
1580 * in a "pending" state, waiting for some external event. For "on-
1581 * demand" interfaces, this new state identifies the situation where the
1582 * interface is waiting for events to place it in the up state.
1585 static inline void netif_dormant_on(struct net_device *dev)
1587 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1588 linkwatch_fire_event(dev);
1592 * netif_dormant_off - set device as not dormant.
1593 * @dev: network device
1595 * Device is not in dormant state.
1597 static inline void netif_dormant_off(struct net_device *dev)
1599 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1600 linkwatch_fire_event(dev);
1604 * netif_dormant - test if carrier present
1605 * @dev: network device
1607 * Check if carrier is present on device
1609 static inline int netif_dormant(const struct net_device *dev)
1611 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1616 * netif_oper_up - test if device is operational
1617 * @dev: network device
1619 * Check if carrier is operational
1621 static inline int netif_oper_up(const struct net_device *dev)
1623 return (dev->operstate == IF_OPER_UP ||
1624 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1628 * netif_device_present - is device available or removed
1629 * @dev: network device
1631 * Check if device has not been removed from system.
1633 static inline int netif_device_present(struct net_device *dev)
1635 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1638 extern void netif_device_detach(struct net_device *dev);
1640 extern void netif_device_attach(struct net_device *dev);
1643 * Network interface message level settings
1645 #define HAVE_NETIF_MSG 1
1648 NETIF_MSG_DRV = 0x0001,
1649 NETIF_MSG_PROBE = 0x0002,
1650 NETIF_MSG_LINK = 0x0004,
1651 NETIF_MSG_TIMER = 0x0008,
1652 NETIF_MSG_IFDOWN = 0x0010,
1653 NETIF_MSG_IFUP = 0x0020,
1654 NETIF_MSG_RX_ERR = 0x0040,
1655 NETIF_MSG_TX_ERR = 0x0080,
1656 NETIF_MSG_TX_QUEUED = 0x0100,
1657 NETIF_MSG_INTR = 0x0200,
1658 NETIF_MSG_TX_DONE = 0x0400,
1659 NETIF_MSG_RX_STATUS = 0x0800,
1660 NETIF_MSG_PKTDATA = 0x1000,
1661 NETIF_MSG_HW = 0x2000,
1662 NETIF_MSG_WOL = 0x4000,
1665 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1666 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1667 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1668 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1669 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1670 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1671 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1672 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1673 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1674 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1675 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1676 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1677 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1678 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1679 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1681 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1684 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1685 return default_msg_enable_bits;
1686 if (debug_value == 0) /* no output */
1688 /* set low N bits */
1689 return (1 << debug_value) - 1;
1692 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1694 spin_lock(&txq->_xmit_lock);
1695 txq->xmit_lock_owner = cpu;
1698 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1700 spin_lock_bh(&txq->_xmit_lock);
1701 txq->xmit_lock_owner = smp_processor_id();
1704 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1706 int ok = spin_trylock(&txq->_xmit_lock);
1708 txq->xmit_lock_owner = smp_processor_id();
1712 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1714 txq->xmit_lock_owner = -1;
1715 spin_unlock(&txq->_xmit_lock);
1718 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1720 txq->xmit_lock_owner = -1;
1721 spin_unlock_bh(&txq->_xmit_lock);
1724 static inline void txq_trans_update(struct netdev_queue *txq)
1726 if (txq->xmit_lock_owner != -1)
1727 txq->trans_start = jiffies;
1731 * netif_tx_lock - grab network device transmit lock
1732 * @dev: network device
1734 * Get network device transmit lock
1736 static inline void netif_tx_lock(struct net_device *dev)
1741 spin_lock(&dev->tx_global_lock);
1742 cpu = smp_processor_id();
1743 for (i = 0; i < dev->num_tx_queues; i++) {
1744 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1746 /* We are the only thread of execution doing a
1747 * freeze, but we have to grab the _xmit_lock in
1748 * order to synchronize with threads which are in
1749 * the ->hard_start_xmit() handler and already
1750 * checked the frozen bit.
1752 __netif_tx_lock(txq, cpu);
1753 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1754 __netif_tx_unlock(txq);
1758 static inline void netif_tx_lock_bh(struct net_device *dev)
1764 static inline void netif_tx_unlock(struct net_device *dev)
1768 for (i = 0; i < dev->num_tx_queues; i++) {
1769 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1771 /* No need to grab the _xmit_lock here. If the
1772 * queue is not stopped for another reason, we
1775 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1776 netif_schedule_queue(txq);
1778 spin_unlock(&dev->tx_global_lock);
1781 static inline void netif_tx_unlock_bh(struct net_device *dev)
1783 netif_tx_unlock(dev);
1787 #define HARD_TX_LOCK(dev, txq, cpu) { \
1788 if ((dev->features & NETIF_F_LLTX) == 0) { \
1789 __netif_tx_lock(txq, cpu); \
1793 #define HARD_TX_UNLOCK(dev, txq) { \
1794 if ((dev->features & NETIF_F_LLTX) == 0) { \
1795 __netif_tx_unlock(txq); \
1799 static inline void netif_tx_disable(struct net_device *dev)
1805 cpu = smp_processor_id();
1806 for (i = 0; i < dev->num_tx_queues; i++) {
1807 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1809 __netif_tx_lock(txq, cpu);
1810 netif_tx_stop_queue(txq);
1811 __netif_tx_unlock(txq);
1816 static inline void netif_addr_lock(struct net_device *dev)
1818 spin_lock(&dev->addr_list_lock);
1821 static inline void netif_addr_lock_bh(struct net_device *dev)
1823 spin_lock_bh(&dev->addr_list_lock);
1826 static inline void netif_addr_unlock(struct net_device *dev)
1828 spin_unlock(&dev->addr_list_lock);
1831 static inline void netif_addr_unlock_bh(struct net_device *dev)
1833 spin_unlock_bh(&dev->addr_list_lock);
1837 * dev_addrs walker. Should be used only for read access. Call with
1838 * rcu_read_lock held.
1840 #define for_each_dev_addr(dev, ha) \
1841 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1843 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1845 extern void ether_setup(struct net_device *dev);
1847 /* Support for loadable net-drivers */
1848 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1849 void (*setup)(struct net_device *),
1850 unsigned int queue_count);
1851 #define alloc_netdev(sizeof_priv, name, setup) \
1852 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1853 extern int register_netdev(struct net_device *dev);
1854 extern void unregister_netdev(struct net_device *dev);
1856 /* Functions used for device addresses handling */
1857 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1858 unsigned char addr_type);
1859 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1860 unsigned char addr_type);
1861 extern int dev_addr_add_multiple(struct net_device *to_dev,
1862 struct net_device *from_dev,
1863 unsigned char addr_type);
1864 extern int dev_addr_del_multiple(struct net_device *to_dev,
1865 struct net_device *from_dev,
1866 unsigned char addr_type);
1868 /* Functions used for secondary unicast and multicast support */
1869 extern void dev_set_rx_mode(struct net_device *dev);
1870 extern void __dev_set_rx_mode(struct net_device *dev);
1871 extern int dev_unicast_delete(struct net_device *dev, void *addr);
1872 extern int dev_unicast_add(struct net_device *dev, void *addr);
1873 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1874 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1875 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1876 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1877 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1878 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1879 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1880 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1881 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1882 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1883 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1884 extern int dev_set_allmulti(struct net_device *dev, int inc);
1885 extern void netdev_state_change(struct net_device *dev);
1886 extern void netdev_bonding_change(struct net_device *dev,
1887 unsigned long event);
1888 extern void netdev_features_change(struct net_device *dev);
1889 /* Load a device via the kmod */
1890 extern void dev_load(struct net *net, const char *name);
1891 extern void dev_mcast_init(void);
1892 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1894 extern int netdev_max_backlog;
1895 extern int weight_p;
1896 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1897 extern int skb_checksum_help(struct sk_buff *skb);
1898 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1900 extern void netdev_rx_csum_fault(struct net_device *dev);
1902 static inline void netdev_rx_csum_fault(struct net_device *dev)
1906 /* rx skb timestamps */
1907 extern void net_enable_timestamp(void);
1908 extern void net_disable_timestamp(void);
1910 #ifdef CONFIG_PROC_FS
1911 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1912 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1913 extern void dev_seq_stop(struct seq_file *seq, void *v);
1916 extern int netdev_class_create_file(struct class_attribute *class_attr);
1917 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1919 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1921 extern void linkwatch_run_queue(void);
1923 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1924 unsigned long mask);
1925 unsigned long netdev_fix_features(unsigned long features, const char *name);
1927 static inline int net_gso_ok(int features, int gso_type)
1929 int feature = gso_type << NETIF_F_GSO_SHIFT;
1930 return (features & feature) == feature;
1933 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1935 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1936 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1939 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1941 return skb_is_gso(skb) &&
1942 (!skb_gso_ok(skb, dev->features) ||
1943 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1946 static inline void netif_set_gso_max_size(struct net_device *dev,
1949 dev->gso_max_size = size;
1952 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
1953 struct net_device *master)
1955 if (skb->pkt_type == PACKET_HOST) {
1956 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
1958 memcpy(dest, master->dev_addr, ETH_ALEN);
1962 /* On bonding slaves other than the currently active slave, suppress
1963 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1964 * ARP on active-backup slaves with arp_validate enabled.
1966 static inline int skb_bond_should_drop(struct sk_buff *skb)
1968 struct net_device *dev = skb->dev;
1969 struct net_device *master = dev->master;
1972 if (master->priv_flags & IFF_MASTER_ARPMON)
1973 dev->last_rx = jiffies;
1975 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
1976 /* Do address unmangle. The local destination address
1977 * will be always the one master has. Provides the right
1978 * functionality in a bridge.
1980 skb_bond_set_mac_by_master(skb, master);
1983 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
1984 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1985 skb->protocol == __cpu_to_be16(ETH_P_ARP))
1988 if (master->priv_flags & IFF_MASTER_ALB) {
1989 if (skb->pkt_type != PACKET_BROADCAST &&
1990 skb->pkt_type != PACKET_MULTICAST)
1993 if (master->priv_flags & IFF_MASTER_8023AD &&
1994 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2003 extern struct pernet_operations __net_initdata loopback_net_ops;
2005 static inline int dev_ethtool_get_settings(struct net_device *dev,
2006 struct ethtool_cmd *cmd)
2008 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2010 return dev->ethtool_ops->get_settings(dev, cmd);
2013 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2015 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2017 return dev->ethtool_ops->get_rx_csum(dev);
2020 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2022 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2024 return dev->ethtool_ops->get_flags(dev);
2026 #endif /* __KERNEL__ */
2028 #endif /* _LINUX_NETDEVICE_H */