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() */
67 * Transmit return codes: transmit return codes originate from three different
70 * - qdisc return codes
71 * - driver transmit return codes
74 * Drivers are allowed to return any one of those in their hard_start_xmit()
75 * function. Real network devices commonly used with qdiscs should only return
76 * the driver transmit return codes though - when qdiscs are used, the actual
77 * transmission happens asynchronously, so the value is not propagated to
78 * higher layers. Virtual network devices transmit synchronously, in this case
79 * the driver transmit return codes are consumed by dev_queue_xmit(), all
80 * others are propagated to higher layers.
83 /* qdisc ->enqueue() return codes. */
84 #define NET_XMIT_SUCCESS 0x00
85 #define NET_XMIT_DROP 0x10 /* skb dropped */
86 #define NET_XMIT_CN 0x20 /* congestion notification */
87 #define NET_XMIT_POLICED 0x30 /* skb is shot by police */
88 #define NET_XMIT_MASK 0xf0 /* qdisc flags in net/sch_generic.h */
90 /* Backlog congestion levels */
91 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
92 #define NET_RX_DROP 1 /* packet dropped */
94 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
95 * indicates that the device will soon be dropping packets, or already drops
96 * some packets of the same priority; prompting us to send less aggressively. */
97 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
98 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
100 /* Driver transmit return codes */
101 #define NETDEV_TX_MASK 0xf
104 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
105 NETDEV_TX_OK = 0, /* driver took care of packet */
106 NETDEV_TX_BUSY = 1, /* driver tx path was busy*/
107 NETDEV_TX_LOCKED = 2, /* driver tx lock was already taken */
109 typedef enum netdev_tx netdev_tx_t;
113 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
117 * Compute the worst case header length according to the protocols
121 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
122 # if defined(CONFIG_MAC80211_MESH)
123 # define LL_MAX_HEADER 128
125 # define LL_MAX_HEADER 96
127 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
128 # define LL_MAX_HEADER 48
130 # define LL_MAX_HEADER 32
133 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
134 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
135 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
136 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
137 #define MAX_HEADER LL_MAX_HEADER
139 #define MAX_HEADER (LL_MAX_HEADER + 48)
142 #endif /* __KERNEL__ */
145 * Network device statistics. Akin to the 2.0 ether stats but
146 * with byte counters.
149 struct net_device_stats {
150 unsigned long rx_packets; /* total packets received */
151 unsigned long tx_packets; /* total packets transmitted */
152 unsigned long rx_bytes; /* total bytes received */
153 unsigned long tx_bytes; /* total bytes transmitted */
154 unsigned long rx_errors; /* bad packets received */
155 unsigned long tx_errors; /* packet transmit problems */
156 unsigned long rx_dropped; /* no space in linux buffers */
157 unsigned long tx_dropped; /* no space available in linux */
158 unsigned long multicast; /* multicast packets received */
159 unsigned long collisions;
161 /* detailed rx_errors: */
162 unsigned long rx_length_errors;
163 unsigned long rx_over_errors; /* receiver ring buff overflow */
164 unsigned long rx_crc_errors; /* recved pkt with crc error */
165 unsigned long rx_frame_errors; /* recv'd frame alignment error */
166 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
167 unsigned long rx_missed_errors; /* receiver missed packet */
169 /* detailed tx_errors */
170 unsigned long tx_aborted_errors;
171 unsigned long tx_carrier_errors;
172 unsigned long tx_fifo_errors;
173 unsigned long tx_heartbeat_errors;
174 unsigned long tx_window_errors;
177 unsigned long rx_compressed;
178 unsigned long tx_compressed;
182 /* Media selection options. */
195 #include <linux/cache.h>
196 #include <linux/skbuff.h>
202 struct netif_rx_stats {
205 unsigned time_squeeze;
206 unsigned cpu_collision;
209 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
211 struct dev_addr_list {
212 struct dev_addr_list *next;
213 u8 da_addr[MAX_ADDR_LEN];
221 * We tag multicasts with these structures.
224 #define dev_mc_list dev_addr_list
225 #define dmi_addr da_addr
226 #define dmi_addrlen da_addrlen
227 #define dmi_users da_users
228 #define dmi_gusers da_gusers
230 struct netdev_hw_addr {
231 struct list_head list;
232 unsigned char addr[MAX_ADDR_LEN];
234 #define NETDEV_HW_ADDR_T_LAN 1
235 #define NETDEV_HW_ADDR_T_SAN 2
236 #define NETDEV_HW_ADDR_T_SLAVE 3
237 #define NETDEV_HW_ADDR_T_UNICAST 4
240 struct rcu_head rcu_head;
243 struct netdev_hw_addr_list {
244 struct list_head list;
249 struct hh_cache *hh_next; /* Next entry */
250 atomic_t hh_refcnt; /* number of users */
252 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
254 * They are mostly read, but hh_refcnt may be changed quite frequently,
255 * incurring cache line ping pongs.
257 __be16 hh_type ____cacheline_aligned_in_smp;
258 /* protocol identifier, f.e ETH_P_IP
259 * NOTE: For VLANs, this will be the
260 * encapuslated type. --BLG
262 u16 hh_len; /* length of header */
263 int (*hh_output)(struct sk_buff *skb);
266 /* cached hardware header; allow for machine alignment needs. */
267 #define HH_DATA_MOD 16
268 #define HH_DATA_OFF(__len) \
269 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
270 #define HH_DATA_ALIGN(__len) \
271 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
272 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
275 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
277 * dev->hard_header_len ? (dev->hard_header_len +
278 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
280 * We could use other alignment values, but we must maintain the
281 * relationship HH alignment <= LL alignment.
283 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
286 #define LL_RESERVED_SPACE(dev) \
287 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
288 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
289 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
290 #define LL_ALLOCATED_SPACE(dev) \
291 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
294 int (*create) (struct sk_buff *skb, struct net_device *dev,
295 unsigned short type, const void *daddr,
296 const void *saddr, unsigned len);
297 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
298 int (*rebuild)(struct sk_buff *skb);
299 #define HAVE_HEADER_CACHE
300 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
301 void (*cache_update)(struct hh_cache *hh,
302 const struct net_device *dev,
303 const unsigned char *haddr);
306 /* These flag bits are private to the generic network queueing
307 * layer, they may not be explicitly referenced by any other
311 enum netdev_state_t {
313 __LINK_STATE_PRESENT,
314 __LINK_STATE_NOCARRIER,
315 __LINK_STATE_LINKWATCH_PENDING,
316 __LINK_STATE_DORMANT,
321 * This structure holds at boot time configured netdevice settings. They
322 * are then used in the device probing.
324 struct netdev_boot_setup {
328 #define NETDEV_BOOT_SETUP_MAX 8
330 extern int __init netdev_boot_setup(char *str);
333 * Structure for NAPI scheduling similar to tasklet but with weighting
336 /* The poll_list must only be managed by the entity which
337 * changes the state of the NAPI_STATE_SCHED bit. This means
338 * whoever atomically sets that bit can add this napi_struct
339 * to the per-cpu poll_list, and whoever clears that bit
340 * can remove from the list right before clearing the bit.
342 struct list_head poll_list;
346 int (*poll)(struct napi_struct *, int);
347 #ifdef CONFIG_NETPOLL
348 spinlock_t poll_lock;
352 unsigned int gro_count;
354 struct net_device *dev;
355 struct list_head dev_list;
356 struct sk_buff *gro_list;
361 NAPI_STATE_SCHED, /* Poll is scheduled */
362 NAPI_STATE_DISABLE, /* Disable pending */
363 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
373 typedef enum gro_result gro_result_t;
375 extern void __napi_schedule(struct napi_struct *n);
377 static inline int napi_disable_pending(struct napi_struct *n)
379 return test_bit(NAPI_STATE_DISABLE, &n->state);
383 * napi_schedule_prep - check if napi can be scheduled
386 * Test if NAPI routine is already running, and if not mark
387 * it as running. This is used as a condition variable
388 * insure only one NAPI poll instance runs. We also make
389 * sure there is no pending NAPI disable.
391 static inline int napi_schedule_prep(struct napi_struct *n)
393 return !napi_disable_pending(n) &&
394 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
398 * napi_schedule - schedule NAPI poll
401 * Schedule NAPI poll routine to be called if it is not already
404 static inline void napi_schedule(struct napi_struct *n)
406 if (napi_schedule_prep(n))
410 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
411 static inline int napi_reschedule(struct napi_struct *napi)
413 if (napi_schedule_prep(napi)) {
414 __napi_schedule(napi);
421 * napi_complete - NAPI processing complete
424 * Mark NAPI processing as complete.
426 extern void __napi_complete(struct napi_struct *n);
427 extern void napi_complete(struct napi_struct *n);
430 * napi_disable - prevent NAPI from scheduling
433 * Stop NAPI from being scheduled on this context.
434 * Waits till any outstanding processing completes.
436 static inline void napi_disable(struct napi_struct *n)
438 set_bit(NAPI_STATE_DISABLE, &n->state);
439 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
441 clear_bit(NAPI_STATE_DISABLE, &n->state);
445 * napi_enable - enable NAPI scheduling
448 * Resume NAPI from being scheduled on this context.
449 * Must be paired with napi_disable.
451 static inline void napi_enable(struct napi_struct *n)
453 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
454 smp_mb__before_clear_bit();
455 clear_bit(NAPI_STATE_SCHED, &n->state);
460 * napi_synchronize - wait until NAPI is not running
463 * Wait until NAPI is done being scheduled on this context.
464 * Waits till any outstanding processing completes but
465 * does not disable future activations.
467 static inline void napi_synchronize(const struct napi_struct *n)
469 while (test_bit(NAPI_STATE_SCHED, &n->state))
473 # define napi_synchronize(n) barrier()
476 enum netdev_queue_state_t {
478 __QUEUE_STATE_FROZEN,
481 struct netdev_queue {
485 struct net_device *dev;
488 struct Qdisc *qdisc_sleeping;
492 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
495 * please use this field instead of dev->trans_start
497 unsigned long trans_start;
498 unsigned long tx_bytes;
499 unsigned long tx_packets;
500 unsigned long tx_dropped;
501 } ____cacheline_aligned_in_smp;
505 * This structure defines the management hooks for network devices.
506 * The following hooks can be defined; unless noted otherwise, they are
507 * optional and can be filled with a null pointer.
509 * int (*ndo_init)(struct net_device *dev);
510 * This function is called once when network device is registered.
511 * The network device can use this to any late stage initializaton
512 * or semantic validattion. It can fail with an error code which will
513 * be propogated back to register_netdev
515 * void (*ndo_uninit)(struct net_device *dev);
516 * This function is called when device is unregistered or when registration
517 * fails. It is not called if init fails.
519 * int (*ndo_open)(struct net_device *dev);
520 * This function is called when network device transistions to the up
523 * int (*ndo_stop)(struct net_device *dev);
524 * This function is called when network device transistions to the down
527 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
528 * struct net_device *dev);
529 * Called when a packet needs to be transmitted.
530 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
531 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
532 * Required can not be NULL.
534 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
535 * Called to decide which queue to when device supports multiple
538 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
539 * This function is called to allow device receiver to make
540 * changes to configuration when multicast or promiscious is enabled.
542 * void (*ndo_set_rx_mode)(struct net_device *dev);
543 * This function is called device changes address list filtering.
545 * void (*ndo_set_multicast_list)(struct net_device *dev);
546 * This function is called when the multicast address list changes.
548 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
549 * This function is called when the Media Access Control address
550 * needs to be changed. If this interface is not defined, the
551 * mac address can not be changed.
553 * int (*ndo_validate_addr)(struct net_device *dev);
554 * Test if Media Access Control address is valid for the device.
556 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
557 * Called when a user request an ioctl which can't be handled by
558 * the generic interface code. If not defined ioctl's return
559 * not supported error code.
561 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
562 * Used to set network devices bus interface parameters. This interface
563 * is retained for legacy reason, new devices should use the bus
564 * interface (PCI) for low level management.
566 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
567 * Called when a user wants to change the Maximum Transfer Unit
568 * of a device. If not defined, any request to change MTU will
569 * will return an error.
571 * void (*ndo_tx_timeout)(struct net_device *dev);
572 * Callback uses when the transmitter has not made any progress
573 * for dev->watchdog ticks.
575 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
576 * Called when a user wants to get the network device usage
577 * statistics. If not defined, the counters in dev->stats will
580 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
581 * If device support VLAN receive accleration
582 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
583 * when vlan groups for the device changes. Note: grp is NULL
584 * if no vlan's groups are being used.
586 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
587 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
588 * this function is called when a VLAN id is registered.
590 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
591 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
592 * this function is called when a VLAN id is unregistered.
594 * void (*ndo_poll_controller)(struct net_device *dev);
596 #define HAVE_NET_DEVICE_OPS
597 struct net_device_ops {
598 int (*ndo_init)(struct net_device *dev);
599 void (*ndo_uninit)(struct net_device *dev);
600 int (*ndo_open)(struct net_device *dev);
601 int (*ndo_stop)(struct net_device *dev);
602 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
603 struct net_device *dev);
604 u16 (*ndo_select_queue)(struct net_device *dev,
605 struct sk_buff *skb);
606 #define HAVE_CHANGE_RX_FLAGS
607 void (*ndo_change_rx_flags)(struct net_device *dev,
609 #define HAVE_SET_RX_MODE
610 void (*ndo_set_rx_mode)(struct net_device *dev);
611 #define HAVE_MULTICAST
612 void (*ndo_set_multicast_list)(struct net_device *dev);
613 #define HAVE_SET_MAC_ADDR
614 int (*ndo_set_mac_address)(struct net_device *dev,
616 #define HAVE_VALIDATE_ADDR
617 int (*ndo_validate_addr)(struct net_device *dev);
618 #define HAVE_PRIVATE_IOCTL
619 int (*ndo_do_ioctl)(struct net_device *dev,
620 struct ifreq *ifr, int cmd);
621 #define HAVE_SET_CONFIG
622 int (*ndo_set_config)(struct net_device *dev,
624 #define HAVE_CHANGE_MTU
625 int (*ndo_change_mtu)(struct net_device *dev,
627 int (*ndo_neigh_setup)(struct net_device *dev,
628 struct neigh_parms *);
629 #define HAVE_TX_TIMEOUT
630 void (*ndo_tx_timeout) (struct net_device *dev);
632 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
634 void (*ndo_vlan_rx_register)(struct net_device *dev,
635 struct vlan_group *grp);
636 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
638 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
640 #ifdef CONFIG_NET_POLL_CONTROLLER
641 #define HAVE_NETDEV_POLL
642 void (*ndo_poll_controller)(struct net_device *dev);
644 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
645 int (*ndo_fcoe_enable)(struct net_device *dev);
646 int (*ndo_fcoe_disable)(struct net_device *dev);
647 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
649 struct scatterlist *sgl,
651 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
653 #define NETDEV_FCOE_WWNN 0
654 #define NETDEV_FCOE_WWPN 1
655 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
661 * The DEVICE structure.
662 * Actually, this whole structure is a big mistake. It mixes I/O
663 * data with strictly "high-level" data, and it has to know about
664 * almost every data structure used in the INET module.
666 * FIXME: cleanup struct net_device such that network protocol info
673 * This is the first field of the "visible" part of this structure
674 * (i.e. as seen by users in the "Space.c" file). It is the name
678 /* device name hash chain */
679 struct hlist_node name_hlist;
684 * I/O specific fields
685 * FIXME: Merge these and struct ifmap into one
687 unsigned long mem_end; /* shared mem end */
688 unsigned long mem_start; /* shared mem start */
689 unsigned long base_addr; /* device I/O address */
690 unsigned int irq; /* device IRQ number */
693 * Some hardware also needs these fields, but they are not
694 * part of the usual set specified in Space.c.
697 unsigned char if_port; /* Selectable AUI, TP,..*/
698 unsigned char dma; /* DMA channel */
702 struct list_head dev_list;
703 struct list_head napi_list;
704 struct list_head unreg_list;
706 /* Net device features */
707 unsigned long features;
708 #define NETIF_F_SG 1 /* Scatter/gather IO. */
709 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
710 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
711 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
712 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
713 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
714 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
715 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
716 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
717 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
718 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
719 #define NETIF_F_GSO 2048 /* Enable software GSO. */
720 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
721 /* do not use LLTX in new drivers */
722 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
723 #define NETIF_F_GRO 16384 /* Generic receive offload */
724 #define NETIF_F_LRO 32768 /* large receive offload */
726 /* the GSO_MASK reserves bits 16 through 23 */
727 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
728 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
729 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
731 /* Segmentation offload features */
732 #define NETIF_F_GSO_SHIFT 16
733 #define NETIF_F_GSO_MASK 0x00ff0000
734 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
735 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
736 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
737 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
738 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
739 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
741 /* List of features with software fallbacks. */
742 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
745 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
746 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
747 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
748 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
751 * If one device supports one of these features, then enable them
752 * for all in netdev_increment_features.
754 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
755 NETIF_F_SG | NETIF_F_HIGHDMA | \
758 /* Interface index. Unique device identifier */
762 struct net_device_stats stats;
764 #ifdef CONFIG_WIRELESS_EXT
765 /* List of functions to handle Wireless Extensions (instead of ioctl).
766 * See <net/iw_handler.h> for details. Jean II */
767 const struct iw_handler_def * wireless_handlers;
768 /* Instance data managed by the core of Wireless Extensions. */
769 struct iw_public_data * wireless_data;
771 /* Management operations */
772 const struct net_device_ops *netdev_ops;
773 const struct ethtool_ops *ethtool_ops;
775 /* Hardware header description */
776 const struct header_ops *header_ops;
778 unsigned int flags; /* interface flags (a la BSD) */
779 unsigned short gflags;
780 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
781 unsigned short padded; /* How much padding added by alloc_netdev() */
783 unsigned char operstate; /* RFC2863 operstate */
784 unsigned char link_mode; /* mapping policy to operstate */
786 unsigned mtu; /* interface MTU value */
787 unsigned short type; /* interface hardware type */
788 unsigned short hard_header_len; /* hardware hdr length */
790 /* extra head- and tailroom the hardware may need, but not in all cases
791 * can this be guaranteed, especially tailroom. Some cases also use
792 * LL_MAX_HEADER instead to allocate the skb.
794 unsigned short needed_headroom;
795 unsigned short needed_tailroom;
797 struct net_device *master; /* Pointer to master device of a group,
798 * which this device is member of.
801 /* Interface address info. */
802 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
803 unsigned char addr_len; /* hardware address length */
804 unsigned short dev_id; /* for shared network cards */
806 struct netdev_hw_addr_list uc; /* Secondary unicast
809 spinlock_t addr_list_lock;
810 struct dev_addr_list *mc_list; /* Multicast mac addresses */
811 int mc_count; /* Number of installed mcasts */
812 unsigned int promiscuity;
813 unsigned int allmulti;
816 /* Protocol specific pointers */
818 #ifdef CONFIG_NET_DSA
819 void *dsa_ptr; /* dsa specific data */
821 void *atalk_ptr; /* AppleTalk link */
822 void *ip_ptr; /* IPv4 specific data */
823 void *dn_ptr; /* DECnet specific data */
824 void *ip6_ptr; /* IPv6 specific data */
825 void *ec_ptr; /* Econet specific data */
826 void *ax25_ptr; /* AX.25 specific data */
827 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
828 assign before registering */
831 * Cache line mostly used on receive path (including eth_type_trans())
833 unsigned long last_rx; /* Time of last Rx */
834 /* Interface address info used in eth_type_trans() */
835 unsigned char *dev_addr; /* hw address, (before bcast
836 because most packets are
839 struct netdev_hw_addr_list dev_addrs; /* list of device
842 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
844 struct netdev_queue rx_queue;
846 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
848 /* Number of TX queues allocated at alloc_netdev_mq() time */
849 unsigned int num_tx_queues;
851 /* Number of TX queues currently active in device */
852 unsigned int real_num_tx_queues;
854 /* root qdisc from userspace point of view */
857 unsigned long tx_queue_len; /* Max frames per queue allowed */
858 spinlock_t tx_global_lock;
860 * One part is mostly used on xmit path (device)
862 /* These may be needed for future network-power-down code. */
865 * trans_start here is expensive for high speed devices on SMP,
866 * please use netdev_queue->trans_start instead.
868 unsigned long trans_start; /* Time (in jiffies) of last Tx */
870 int watchdog_timeo; /* used by dev_watchdog() */
871 struct timer_list watchdog_timer;
873 /* Number of references to this device */
874 atomic_t refcnt ____cacheline_aligned_in_smp;
876 /* delayed register/unregister */
877 struct list_head todo_list;
878 /* device index hash chain */
879 struct hlist_node index_hlist;
881 struct net_device *link_watch_next;
883 /* register/unregister state machine */
884 enum { NETREG_UNINITIALIZED=0,
885 NETREG_REGISTERED, /* completed register_netdevice */
886 NETREG_UNREGISTERING, /* called unregister_netdevice */
887 NETREG_UNREGISTERED, /* completed unregister todo */
888 NETREG_RELEASED, /* called free_netdev */
889 NETREG_DUMMY, /* dummy device for NAPI poll */
892 /* Called from unregister, can be used to call free_netdev */
893 void (*destructor)(struct net_device *dev);
895 #ifdef CONFIG_NETPOLL
896 struct netpoll_info *npinfo;
900 /* Network namespace this network device is inside */
904 /* mid-layer private */
908 struct net_bridge_port *br_port;
910 struct macvlan_port *macvlan_port;
912 struct garp_port *garp_port;
914 /* class/net/name entry */
916 /* space for optional device, statistics, and wireless sysfs groups */
917 const struct attribute_group *sysfs_groups[4];
919 /* rtnetlink link ops */
920 const struct rtnl_link_ops *rtnl_link_ops;
922 /* VLAN feature mask */
923 unsigned long vlan_features;
925 /* for setting kernel sock attribute on TCP connection setup */
926 #define GSO_MAX_SIZE 65536
927 unsigned int gso_max_size;
930 /* Data Center Bridging netlink ops */
931 const struct dcbnl_rtnl_ops *dcbnl_ops;
934 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
935 /* max exchange id for FCoE LRO by ddp */
936 unsigned int fcoe_ddp_xid;
939 #define to_net_dev(d) container_of(d, struct net_device, dev)
941 #define NETDEV_ALIGN 32
944 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
947 return &dev->_tx[index];
950 static inline void netdev_for_each_tx_queue(struct net_device *dev,
951 void (*f)(struct net_device *,
952 struct netdev_queue *,
958 for (i = 0; i < dev->num_tx_queues; i++)
959 f(dev, &dev->_tx[i], arg);
963 * Net namespace inlines
966 struct net *dev_net(const struct net_device *dev)
976 void dev_net_set(struct net_device *dev, struct net *net)
979 release_net(dev->nd_net);
980 dev->nd_net = hold_net(net);
984 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
986 #ifdef CONFIG_NET_DSA_TAG_DSA
987 if (dev->dsa_ptr != NULL)
988 return dsa_uses_dsa_tags(dev->dsa_ptr);
994 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
996 #ifdef CONFIG_NET_DSA_TAG_TRAILER
997 if (dev->dsa_ptr != NULL)
998 return dsa_uses_trailer_tags(dev->dsa_ptr);
1005 * netdev_priv - access network device private data
1006 * @dev: network device
1008 * Get network device private data
1010 static inline void *netdev_priv(const struct net_device *dev)
1012 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1015 /* Set the sysfs physical device reference for the network logical device
1016 * if set prior to registration will cause a symlink during initialization.
1018 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1020 /* Set the sysfs device type for the network logical device to allow
1021 * fin grained indentification of different network device types. For
1022 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1024 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1027 * netif_napi_add - initialize a napi context
1028 * @dev: network device
1029 * @napi: napi context
1030 * @poll: polling function
1031 * @weight: default weight
1033 * netif_napi_add() must be used to initialize a napi context prior to calling
1034 * *any* of the other napi related functions.
1036 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1037 int (*poll)(struct napi_struct *, int), int weight);
1040 * netif_napi_del - remove a napi context
1041 * @napi: napi context
1043 * netif_napi_del() removes a napi context from the network device napi list
1045 void netif_napi_del(struct napi_struct *napi);
1047 struct napi_gro_cb {
1048 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1051 /* Length of frag0. */
1052 unsigned int frag0_len;
1054 /* This indicates where we are processing relative to skb->data. */
1057 /* This is non-zero if the packet may be of the same flow. */
1060 /* This is non-zero if the packet cannot be merged with the new skb. */
1063 /* Number of segments aggregated. */
1070 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1072 struct packet_type {
1073 __be16 type; /* This is really htons(ether_type). */
1074 struct net_device *dev; /* NULL is wildcarded here */
1075 int (*func) (struct sk_buff *,
1076 struct net_device *,
1077 struct packet_type *,
1078 struct net_device *);
1079 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1081 int (*gso_send_check)(struct sk_buff *skb);
1082 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1083 struct sk_buff *skb);
1084 int (*gro_complete)(struct sk_buff *skb);
1085 void *af_packet_priv;
1086 struct list_head list;
1089 #include <linux/interrupt.h>
1090 #include <linux/notifier.h>
1092 extern rwlock_t dev_base_lock; /* Device list lock */
1095 #define for_each_netdev(net, d) \
1096 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1097 #define for_each_netdev_rcu(net, d) \
1098 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1099 #define for_each_netdev_safe(net, d, n) \
1100 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1101 #define for_each_netdev_continue(net, d) \
1102 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1103 #define for_each_netdev_continue_rcu(net, d) \
1104 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1105 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1107 static inline struct net_device *next_net_device(struct net_device *dev)
1109 struct list_head *lh;
1113 lh = dev->dev_list.next;
1114 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1117 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1119 struct list_head *lh;
1123 lh = rcu_dereference(dev->dev_list.next);
1124 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1127 static inline struct net_device *first_net_device(struct net *net)
1129 return list_empty(&net->dev_base_head) ? NULL :
1130 net_device_entry(net->dev_base_head.next);
1133 extern int netdev_boot_setup_check(struct net_device *dev);
1134 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1135 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1136 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1137 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1138 extern void dev_add_pack(struct packet_type *pt);
1139 extern void dev_remove_pack(struct packet_type *pt);
1140 extern void __dev_remove_pack(struct packet_type *pt);
1142 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1143 unsigned short mask);
1144 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1145 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1146 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1147 extern int dev_alloc_name(struct net_device *dev, const char *name);
1148 extern int dev_open(struct net_device *dev);
1149 extern int dev_close(struct net_device *dev);
1150 extern void dev_disable_lro(struct net_device *dev);
1151 extern int dev_queue_xmit(struct sk_buff *skb);
1152 extern int register_netdevice(struct net_device *dev);
1153 extern void unregister_netdevice_queue(struct net_device *dev,
1154 struct list_head *head);
1155 extern void unregister_netdevice_many(struct list_head *head);
1156 static inline void unregister_netdevice(struct net_device *dev)
1158 unregister_netdevice_queue(dev, NULL);
1161 extern void free_netdev(struct net_device *dev);
1162 extern void synchronize_net(void);
1163 extern int register_netdevice_notifier(struct notifier_block *nb);
1164 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1165 extern int init_dummy_netdev(struct net_device *dev);
1166 extern void netdev_resync_ops(struct net_device *dev);
1168 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1169 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1170 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1171 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1172 extern int dev_restart(struct net_device *dev);
1173 #ifdef CONFIG_NETPOLL_TRAP
1174 extern int netpoll_trap(void);
1176 extern int skb_gro_receive(struct sk_buff **head,
1177 struct sk_buff *skb);
1178 extern void skb_gro_reset_offset(struct sk_buff *skb);
1180 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1182 return NAPI_GRO_CB(skb)->data_offset;
1185 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1187 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1190 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1192 NAPI_GRO_CB(skb)->data_offset += len;
1195 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1196 unsigned int offset)
1198 return NAPI_GRO_CB(skb)->frag0 + offset;
1201 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1203 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1206 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1207 unsigned int offset)
1209 NAPI_GRO_CB(skb)->frag0 = NULL;
1210 NAPI_GRO_CB(skb)->frag0_len = 0;
1211 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1214 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1216 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1219 static inline void *skb_gro_network_header(struct sk_buff *skb)
1221 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1222 skb_network_offset(skb);
1225 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1226 unsigned short type,
1227 const void *daddr, const void *saddr,
1230 if (!dev->header_ops || !dev->header_ops->create)
1233 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1236 static inline int dev_parse_header(const struct sk_buff *skb,
1237 unsigned char *haddr)
1239 const struct net_device *dev = skb->dev;
1241 if (!dev->header_ops || !dev->header_ops->parse)
1243 return dev->header_ops->parse(skb, haddr);
1246 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1247 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1248 static inline int unregister_gifconf(unsigned int family)
1250 return register_gifconf(family, NULL);
1254 * Incoming packets are placed on per-cpu queues so that
1255 * no locking is needed.
1257 struct softnet_data {
1258 struct Qdisc *output_queue;
1259 struct sk_buff_head input_pkt_queue;
1260 struct list_head poll_list;
1261 struct sk_buff *completion_queue;
1263 struct napi_struct backlog;
1266 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1268 #define HAVE_NETIF_QUEUE
1270 extern void __netif_schedule(struct Qdisc *q);
1272 static inline void netif_schedule_queue(struct netdev_queue *txq)
1274 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1275 __netif_schedule(txq->qdisc);
1278 static inline void netif_tx_schedule_all(struct net_device *dev)
1282 for (i = 0; i < dev->num_tx_queues; i++)
1283 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1286 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1288 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1292 * netif_start_queue - allow transmit
1293 * @dev: network device
1295 * Allow upper layers to call the device hard_start_xmit routine.
1297 static inline void netif_start_queue(struct net_device *dev)
1299 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1302 static inline void netif_tx_start_all_queues(struct net_device *dev)
1306 for (i = 0; i < dev->num_tx_queues; i++) {
1307 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1308 netif_tx_start_queue(txq);
1312 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1314 #ifdef CONFIG_NETPOLL_TRAP
1315 if (netpoll_trap()) {
1316 netif_tx_start_queue(dev_queue);
1320 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1321 __netif_schedule(dev_queue->qdisc);
1325 * netif_wake_queue - restart transmit
1326 * @dev: network device
1328 * Allow upper layers to call the device hard_start_xmit routine.
1329 * Used for flow control when transmit resources are available.
1331 static inline void netif_wake_queue(struct net_device *dev)
1333 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1336 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1340 for (i = 0; i < dev->num_tx_queues; i++) {
1341 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1342 netif_tx_wake_queue(txq);
1346 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1348 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1352 * netif_stop_queue - stop transmitted packets
1353 * @dev: network device
1355 * Stop upper layers calling the device hard_start_xmit routine.
1356 * Used for flow control when transmit resources are unavailable.
1358 static inline void netif_stop_queue(struct net_device *dev)
1360 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1363 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1367 for (i = 0; i < dev->num_tx_queues; i++) {
1368 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1369 netif_tx_stop_queue(txq);
1373 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1375 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1379 * netif_queue_stopped - test if transmit queue is flowblocked
1380 * @dev: network device
1382 * Test if transmit queue on device is currently unable to send.
1384 static inline int netif_queue_stopped(const struct net_device *dev)
1386 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1389 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1391 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1395 * netif_running - test if up
1396 * @dev: network device
1398 * Test if the device has been brought up.
1400 static inline int netif_running(const struct net_device *dev)
1402 return test_bit(__LINK_STATE_START, &dev->state);
1406 * Routines to manage the subqueues on a device. We only need start
1407 * stop, and a check if it's stopped. All other device management is
1408 * done at the overall netdevice level.
1409 * Also test the device if we're multiqueue.
1413 * netif_start_subqueue - allow sending packets on subqueue
1414 * @dev: network device
1415 * @queue_index: sub queue index
1417 * Start individual transmit queue of a device with multiple transmit queues.
1419 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1421 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1423 netif_tx_start_queue(txq);
1427 * netif_stop_subqueue - stop sending packets on subqueue
1428 * @dev: network device
1429 * @queue_index: sub queue index
1431 * Stop individual transmit queue of a device with multiple transmit queues.
1433 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1435 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1436 #ifdef CONFIG_NETPOLL_TRAP
1440 netif_tx_stop_queue(txq);
1444 * netif_subqueue_stopped - test status of subqueue
1445 * @dev: network device
1446 * @queue_index: sub queue index
1448 * Check individual transmit queue of a device with multiple transmit queues.
1450 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1453 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1455 return netif_tx_queue_stopped(txq);
1458 static inline int netif_subqueue_stopped(const struct net_device *dev,
1459 struct sk_buff *skb)
1461 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1465 * netif_wake_subqueue - allow sending packets on subqueue
1466 * @dev: network device
1467 * @queue_index: sub queue index
1469 * Resume individual transmit queue of a device with multiple transmit queues.
1471 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1473 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1474 #ifdef CONFIG_NETPOLL_TRAP
1478 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1479 __netif_schedule(txq->qdisc);
1483 * netif_is_multiqueue - test if device has multiple transmit queues
1484 * @dev: network device
1486 * Check if device has multiple transmit queues
1488 static inline int netif_is_multiqueue(const struct net_device *dev)
1490 return (dev->num_tx_queues > 1);
1493 /* Use this variant when it is known for sure that it
1494 * is executing from hardware interrupt context or with hardware interrupts
1497 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1499 /* Use this variant in places where it could be invoked
1500 * from either hardware interrupt or other context, with hardware interrupts
1501 * either disabled or enabled.
1503 extern void dev_kfree_skb_any(struct sk_buff *skb);
1505 #define HAVE_NETIF_RX 1
1506 extern int netif_rx(struct sk_buff *skb);
1507 extern int netif_rx_ni(struct sk_buff *skb);
1508 #define HAVE_NETIF_RECEIVE_SKB 1
1509 extern int netif_receive_skb(struct sk_buff *skb);
1510 extern void napi_gro_flush(struct napi_struct *napi);
1511 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1512 struct sk_buff *skb);
1513 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1514 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1515 struct sk_buff *skb);
1516 extern void napi_reuse_skb(struct napi_struct *napi,
1517 struct sk_buff *skb);
1518 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1519 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1520 struct sk_buff *skb,
1522 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1523 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1525 static inline void napi_free_frags(struct napi_struct *napi)
1527 kfree_skb(napi->skb);
1531 extern void netif_nit_deliver(struct sk_buff *skb);
1532 extern int dev_valid_name(const char *name);
1533 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1534 extern int dev_ethtool(struct net *net, struct ifreq *);
1535 extern unsigned dev_get_flags(const struct net_device *);
1536 extern int dev_change_flags(struct net_device *, unsigned);
1537 extern int dev_change_name(struct net_device *, const char *);
1538 extern int dev_set_alias(struct net_device *, const char *, size_t);
1539 extern int dev_change_net_namespace(struct net_device *,
1540 struct net *, const char *);
1541 extern int dev_set_mtu(struct net_device *, int);
1542 extern int dev_set_mac_address(struct net_device *,
1544 extern int dev_hard_start_xmit(struct sk_buff *skb,
1545 struct net_device *dev,
1546 struct netdev_queue *txq);
1548 extern int netdev_budget;
1550 /* Called by rtnetlink.c:rtnl_unlock() */
1551 extern void netdev_run_todo(void);
1554 * dev_put - release reference to device
1555 * @dev: network device
1557 * Release reference to device to allow it to be freed.
1559 static inline void dev_put(struct net_device *dev)
1561 atomic_dec(&dev->refcnt);
1565 * dev_hold - get reference to device
1566 * @dev: network device
1568 * Hold reference to device to keep it from being freed.
1570 static inline void dev_hold(struct net_device *dev)
1572 atomic_inc(&dev->refcnt);
1575 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1576 * and _off may be called from IRQ context, but it is caller
1577 * who is responsible for serialization of these calls.
1579 * The name carrier is inappropriate, these functions should really be
1580 * called netif_lowerlayer_*() because they represent the state of any
1581 * kind of lower layer not just hardware media.
1584 extern void linkwatch_fire_event(struct net_device *dev);
1587 * netif_carrier_ok - test if carrier present
1588 * @dev: network device
1590 * Check if carrier is present on device
1592 static inline int netif_carrier_ok(const struct net_device *dev)
1594 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1597 extern unsigned long dev_trans_start(struct net_device *dev);
1599 extern void __netdev_watchdog_up(struct net_device *dev);
1601 extern void netif_carrier_on(struct net_device *dev);
1603 extern void netif_carrier_off(struct net_device *dev);
1606 * netif_dormant_on - mark device as dormant.
1607 * @dev: network device
1609 * Mark device as dormant (as per RFC2863).
1611 * The dormant state indicates that the relevant interface is not
1612 * actually in a condition to pass packets (i.e., it is not 'up') but is
1613 * in a "pending" state, waiting for some external event. For "on-
1614 * demand" interfaces, this new state identifies the situation where the
1615 * interface is waiting for events to place it in the up state.
1618 static inline void netif_dormant_on(struct net_device *dev)
1620 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1621 linkwatch_fire_event(dev);
1625 * netif_dormant_off - set device as not dormant.
1626 * @dev: network device
1628 * Device is not in dormant state.
1630 static inline void netif_dormant_off(struct net_device *dev)
1632 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1633 linkwatch_fire_event(dev);
1637 * netif_dormant - test if carrier present
1638 * @dev: network device
1640 * Check if carrier is present on device
1642 static inline int netif_dormant(const struct net_device *dev)
1644 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1649 * netif_oper_up - test if device is operational
1650 * @dev: network device
1652 * Check if carrier is operational
1654 static inline int netif_oper_up(const struct net_device *dev)
1656 return (dev->operstate == IF_OPER_UP ||
1657 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1661 * netif_device_present - is device available or removed
1662 * @dev: network device
1664 * Check if device has not been removed from system.
1666 static inline int netif_device_present(struct net_device *dev)
1668 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1671 extern void netif_device_detach(struct net_device *dev);
1673 extern void netif_device_attach(struct net_device *dev);
1676 * Network interface message level settings
1678 #define HAVE_NETIF_MSG 1
1681 NETIF_MSG_DRV = 0x0001,
1682 NETIF_MSG_PROBE = 0x0002,
1683 NETIF_MSG_LINK = 0x0004,
1684 NETIF_MSG_TIMER = 0x0008,
1685 NETIF_MSG_IFDOWN = 0x0010,
1686 NETIF_MSG_IFUP = 0x0020,
1687 NETIF_MSG_RX_ERR = 0x0040,
1688 NETIF_MSG_TX_ERR = 0x0080,
1689 NETIF_MSG_TX_QUEUED = 0x0100,
1690 NETIF_MSG_INTR = 0x0200,
1691 NETIF_MSG_TX_DONE = 0x0400,
1692 NETIF_MSG_RX_STATUS = 0x0800,
1693 NETIF_MSG_PKTDATA = 0x1000,
1694 NETIF_MSG_HW = 0x2000,
1695 NETIF_MSG_WOL = 0x4000,
1698 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1699 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1700 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1701 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1702 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1703 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1704 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1705 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1706 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1707 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1708 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1709 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1710 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1711 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1712 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1714 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1717 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1718 return default_msg_enable_bits;
1719 if (debug_value == 0) /* no output */
1721 /* set low N bits */
1722 return (1 << debug_value) - 1;
1725 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1727 spin_lock(&txq->_xmit_lock);
1728 txq->xmit_lock_owner = cpu;
1731 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1733 spin_lock_bh(&txq->_xmit_lock);
1734 txq->xmit_lock_owner = smp_processor_id();
1737 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1739 int ok = spin_trylock(&txq->_xmit_lock);
1741 txq->xmit_lock_owner = smp_processor_id();
1745 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1747 txq->xmit_lock_owner = -1;
1748 spin_unlock(&txq->_xmit_lock);
1751 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1753 txq->xmit_lock_owner = -1;
1754 spin_unlock_bh(&txq->_xmit_lock);
1757 static inline void txq_trans_update(struct netdev_queue *txq)
1759 if (txq->xmit_lock_owner != -1)
1760 txq->trans_start = jiffies;
1764 * netif_tx_lock - grab network device transmit lock
1765 * @dev: network device
1767 * Get network device transmit lock
1769 static inline void netif_tx_lock(struct net_device *dev)
1774 spin_lock(&dev->tx_global_lock);
1775 cpu = smp_processor_id();
1776 for (i = 0; i < dev->num_tx_queues; i++) {
1777 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1779 /* We are the only thread of execution doing a
1780 * freeze, but we have to grab the _xmit_lock in
1781 * order to synchronize with threads which are in
1782 * the ->hard_start_xmit() handler and already
1783 * checked the frozen bit.
1785 __netif_tx_lock(txq, cpu);
1786 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1787 __netif_tx_unlock(txq);
1791 static inline void netif_tx_lock_bh(struct net_device *dev)
1797 static inline void netif_tx_unlock(struct net_device *dev)
1801 for (i = 0; i < dev->num_tx_queues; i++) {
1802 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1804 /* No need to grab the _xmit_lock here. If the
1805 * queue is not stopped for another reason, we
1808 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1809 netif_schedule_queue(txq);
1811 spin_unlock(&dev->tx_global_lock);
1814 static inline void netif_tx_unlock_bh(struct net_device *dev)
1816 netif_tx_unlock(dev);
1820 #define HARD_TX_LOCK(dev, txq, cpu) { \
1821 if ((dev->features & NETIF_F_LLTX) == 0) { \
1822 __netif_tx_lock(txq, cpu); \
1826 #define HARD_TX_UNLOCK(dev, txq) { \
1827 if ((dev->features & NETIF_F_LLTX) == 0) { \
1828 __netif_tx_unlock(txq); \
1832 static inline void netif_tx_disable(struct net_device *dev)
1838 cpu = smp_processor_id();
1839 for (i = 0; i < dev->num_tx_queues; i++) {
1840 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1842 __netif_tx_lock(txq, cpu);
1843 netif_tx_stop_queue(txq);
1844 __netif_tx_unlock(txq);
1849 static inline void netif_addr_lock(struct net_device *dev)
1851 spin_lock(&dev->addr_list_lock);
1854 static inline void netif_addr_lock_bh(struct net_device *dev)
1856 spin_lock_bh(&dev->addr_list_lock);
1859 static inline void netif_addr_unlock(struct net_device *dev)
1861 spin_unlock(&dev->addr_list_lock);
1864 static inline void netif_addr_unlock_bh(struct net_device *dev)
1866 spin_unlock_bh(&dev->addr_list_lock);
1870 * dev_addrs walker. Should be used only for read access. Call with
1871 * rcu_read_lock held.
1873 #define for_each_dev_addr(dev, ha) \
1874 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1876 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1878 extern void ether_setup(struct net_device *dev);
1880 /* Support for loadable net-drivers */
1881 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1882 void (*setup)(struct net_device *),
1883 unsigned int queue_count);
1884 #define alloc_netdev(sizeof_priv, name, setup) \
1885 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1886 extern int register_netdev(struct net_device *dev);
1887 extern void unregister_netdev(struct net_device *dev);
1889 /* Functions used for device addresses handling */
1890 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1891 unsigned char addr_type);
1892 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1893 unsigned char addr_type);
1894 extern int dev_addr_add_multiple(struct net_device *to_dev,
1895 struct net_device *from_dev,
1896 unsigned char addr_type);
1897 extern int dev_addr_del_multiple(struct net_device *to_dev,
1898 struct net_device *from_dev,
1899 unsigned char addr_type);
1901 /* Functions used for secondary unicast and multicast support */
1902 extern void dev_set_rx_mode(struct net_device *dev);
1903 extern void __dev_set_rx_mode(struct net_device *dev);
1904 extern int dev_unicast_delete(struct net_device *dev, void *addr);
1905 extern int dev_unicast_add(struct net_device *dev, void *addr);
1906 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1907 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1908 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1909 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1910 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1911 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1912 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1913 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1914 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1915 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1916 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1917 extern int dev_set_allmulti(struct net_device *dev, int inc);
1918 extern void netdev_state_change(struct net_device *dev);
1919 extern void netdev_bonding_change(struct net_device *dev,
1920 unsigned long event);
1921 extern void netdev_features_change(struct net_device *dev);
1922 /* Load a device via the kmod */
1923 extern void dev_load(struct net *net, const char *name);
1924 extern void dev_mcast_init(void);
1925 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1927 extern int netdev_max_backlog;
1928 extern int weight_p;
1929 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1930 extern int skb_checksum_help(struct sk_buff *skb);
1931 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1933 extern void netdev_rx_csum_fault(struct net_device *dev);
1935 static inline void netdev_rx_csum_fault(struct net_device *dev)
1939 /* rx skb timestamps */
1940 extern void net_enable_timestamp(void);
1941 extern void net_disable_timestamp(void);
1943 #ifdef CONFIG_PROC_FS
1944 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1945 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1946 extern void dev_seq_stop(struct seq_file *seq, void *v);
1949 extern int netdev_class_create_file(struct class_attribute *class_attr);
1950 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1952 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1954 extern void linkwatch_run_queue(void);
1956 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1957 unsigned long mask);
1958 unsigned long netdev_fix_features(unsigned long features, const char *name);
1960 static inline int net_gso_ok(int features, int gso_type)
1962 int feature = gso_type << NETIF_F_GSO_SHIFT;
1963 return (features & feature) == feature;
1966 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1968 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1969 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1972 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1974 return skb_is_gso(skb) &&
1975 (!skb_gso_ok(skb, dev->features) ||
1976 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
1979 static inline void netif_set_gso_max_size(struct net_device *dev,
1982 dev->gso_max_size = size;
1985 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
1986 struct net_device *master)
1988 if (skb->pkt_type == PACKET_HOST) {
1989 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
1991 memcpy(dest, master->dev_addr, ETH_ALEN);
1995 /* On bonding slaves other than the currently active slave, suppress
1996 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1997 * ARP on active-backup slaves with arp_validate enabled.
1999 static inline int skb_bond_should_drop(struct sk_buff *skb)
2001 struct net_device *dev = skb->dev;
2002 struct net_device *master = dev->master;
2005 if (master->priv_flags & IFF_MASTER_ARPMON)
2006 dev->last_rx = jiffies;
2008 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
2009 /* Do address unmangle. The local destination address
2010 * will be always the one master has. Provides the right
2011 * functionality in a bridge.
2013 skb_bond_set_mac_by_master(skb, master);
2016 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
2017 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
2018 skb->protocol == __cpu_to_be16(ETH_P_ARP))
2021 if (master->priv_flags & IFF_MASTER_ALB) {
2022 if (skb->pkt_type != PACKET_BROADCAST &&
2023 skb->pkt_type != PACKET_MULTICAST)
2026 if (master->priv_flags & IFF_MASTER_8023AD &&
2027 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2036 extern struct pernet_operations __net_initdata loopback_net_ops;
2038 static inline int dev_ethtool_get_settings(struct net_device *dev,
2039 struct ethtool_cmd *cmd)
2041 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2043 return dev->ethtool_ops->get_settings(dev, cmd);
2046 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2048 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2050 return dev->ethtool_ops->get_rx_csum(dev);
2053 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2055 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2057 return dev->ethtool_ops->get_flags(dev);
2059 #endif /* __KERNEL__ */
2061 #endif /* _LINUX_NETDEVICE_H */