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>
31 #include <linux/if_link.h>
34 #include <linux/timer.h>
35 #include <linux/delay.h>
37 #include <asm/atomic.h>
38 #include <asm/cache.h>
39 #include <asm/byteorder.h>
41 #include <linux/device.h>
42 #include <linux/percpu.h>
43 #include <linux/rculist.h>
44 #include <linux/dmaengine.h>
45 #include <linux/workqueue.h>
47 #include <linux/ethtool.h>
48 #include <net/net_namespace.h>
51 #include <net/dcbnl.h>
58 /* source back-compat hooks */
59 #define SET_ETHTOOL_OPS(netdev,ops) \
60 ( (netdev)->ethtool_ops = (ops) )
62 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
63 functions are available. */
64 #define HAVE_FREE_NETDEV /* free_netdev() */
65 #define HAVE_NETDEV_PRIV /* netdev_priv() */
67 /* Backlog congestion levels */
68 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
69 #define NET_RX_DROP 1 /* packet dropped */
72 * Transmit return codes: transmit return codes originate from three different
75 * - qdisc return codes
76 * - driver transmit return codes
79 * Drivers are allowed to return any one of those in their hard_start_xmit()
80 * function. Real network devices commonly used with qdiscs should only return
81 * the driver transmit return codes though - when qdiscs are used, the actual
82 * transmission happens asynchronously, so the value is not propagated to
83 * higher layers. Virtual network devices transmit synchronously, in this case
84 * the driver transmit return codes are consumed by dev_queue_xmit(), all
85 * others are propagated to higher layers.
88 /* qdisc ->enqueue() return codes. */
89 #define NET_XMIT_SUCCESS 0x00
90 #define NET_XMIT_DROP 0x01 /* skb dropped */
91 #define NET_XMIT_CN 0x02 /* congestion notification */
92 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
93 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
95 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
96 * indicates that the device will soon be dropping packets, or already drops
97 * some packets of the same priority; prompting us to send less aggressively. */
98 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
99 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
101 /* Driver transmit return codes */
102 #define NETDEV_TX_MASK 0xf0
105 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
106 NETDEV_TX_OK = 0x00, /* driver took care of packet */
107 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
108 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
110 typedef enum netdev_tx netdev_tx_t;
113 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
114 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
116 static inline bool dev_xmit_complete(int rc)
119 * Positive cases with an skb consumed by a driver:
120 * - successful transmission (rc == NETDEV_TX_OK)
121 * - error while transmitting (rc < 0)
122 * - error while queueing to a different device (rc & NET_XMIT_MASK)
124 if (likely(rc < NET_XMIT_MASK))
132 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
136 * Compute the worst case header length according to the protocols
140 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
141 # if defined(CONFIG_MAC80211_MESH)
142 # define LL_MAX_HEADER 128
144 # define LL_MAX_HEADER 96
146 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
147 # define LL_MAX_HEADER 48
149 # define LL_MAX_HEADER 32
152 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
153 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
154 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
155 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
156 #define MAX_HEADER LL_MAX_HEADER
158 #define MAX_HEADER (LL_MAX_HEADER + 48)
161 #endif /* __KERNEL__ */
164 * Network device statistics. Akin to the 2.0 ether stats but
165 * with byte counters.
168 struct net_device_stats {
169 unsigned long rx_packets; /* total packets received */
170 unsigned long tx_packets; /* total packets transmitted */
171 unsigned long rx_bytes; /* total bytes received */
172 unsigned long tx_bytes; /* total bytes transmitted */
173 unsigned long rx_errors; /* bad packets received */
174 unsigned long tx_errors; /* packet transmit problems */
175 unsigned long rx_dropped; /* no space in linux buffers */
176 unsigned long tx_dropped; /* no space available in linux */
177 unsigned long multicast; /* multicast packets received */
178 unsigned long collisions;
180 /* detailed rx_errors: */
181 unsigned long rx_length_errors;
182 unsigned long rx_over_errors; /* receiver ring buff overflow */
183 unsigned long rx_crc_errors; /* recved pkt with crc error */
184 unsigned long rx_frame_errors; /* recv'd frame alignment error */
185 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
186 unsigned long rx_missed_errors; /* receiver missed packet */
188 /* detailed tx_errors */
189 unsigned long tx_aborted_errors;
190 unsigned long tx_carrier_errors;
191 unsigned long tx_fifo_errors;
192 unsigned long tx_heartbeat_errors;
193 unsigned long tx_window_errors;
196 unsigned long rx_compressed;
197 unsigned long tx_compressed;
201 /* Media selection options. */
214 #include <linux/cache.h>
215 #include <linux/skbuff.h>
221 struct netdev_hw_addr {
222 struct list_head list;
223 unsigned char addr[MAX_ADDR_LEN];
225 #define NETDEV_HW_ADDR_T_LAN 1
226 #define NETDEV_HW_ADDR_T_SAN 2
227 #define NETDEV_HW_ADDR_T_SLAVE 3
228 #define NETDEV_HW_ADDR_T_UNICAST 4
229 #define NETDEV_HW_ADDR_T_MULTICAST 5
233 struct rcu_head rcu_head;
236 struct netdev_hw_addr_list {
237 struct list_head list;
241 #define netdev_hw_addr_list_count(l) ((l)->count)
242 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
243 #define netdev_hw_addr_list_for_each(ha, l) \
244 list_for_each_entry(ha, &(l)->list, list)
246 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
247 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
248 #define netdev_for_each_uc_addr(ha, dev) \
249 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
251 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
252 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
253 #define netdev_for_each_mc_addr(ha, dev) \
254 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
257 struct hh_cache *hh_next; /* Next entry */
258 atomic_t hh_refcnt; /* number of users */
260 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
262 * They are mostly read, but hh_refcnt may be changed quite frequently,
263 * incurring cache line ping pongs.
265 __be16 hh_type ____cacheline_aligned_in_smp;
266 /* protocol identifier, f.e ETH_P_IP
267 * NOTE: For VLANs, this will be the
268 * encapuslated type. --BLG
270 u16 hh_len; /* length of header */
271 int (*hh_output)(struct sk_buff *skb);
274 /* cached hardware header; allow for machine alignment needs. */
275 #define HH_DATA_MOD 16
276 #define HH_DATA_OFF(__len) \
277 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
278 #define HH_DATA_ALIGN(__len) \
279 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
280 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
283 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
285 * dev->hard_header_len ? (dev->hard_header_len +
286 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
288 * We could use other alignment values, but we must maintain the
289 * relationship HH alignment <= LL alignment.
291 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
294 #define LL_RESERVED_SPACE(dev) \
295 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
296 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
297 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
298 #define LL_ALLOCATED_SPACE(dev) \
299 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
302 int (*create) (struct sk_buff *skb, struct net_device *dev,
303 unsigned short type, const void *daddr,
304 const void *saddr, unsigned len);
305 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
306 int (*rebuild)(struct sk_buff *skb);
307 #define HAVE_HEADER_CACHE
308 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
309 void (*cache_update)(struct hh_cache *hh,
310 const struct net_device *dev,
311 const unsigned char *haddr);
314 /* These flag bits are private to the generic network queueing
315 * layer, they may not be explicitly referenced by any other
319 enum netdev_state_t {
321 __LINK_STATE_PRESENT,
322 __LINK_STATE_NOCARRIER,
323 __LINK_STATE_LINKWATCH_PENDING,
324 __LINK_STATE_DORMANT,
329 * This structure holds at boot time configured netdevice settings. They
330 * are then used in the device probing.
332 struct netdev_boot_setup {
336 #define NETDEV_BOOT_SETUP_MAX 8
338 extern int __init netdev_boot_setup(char *str);
341 * Structure for NAPI scheduling similar to tasklet but with weighting
344 /* The poll_list must only be managed by the entity which
345 * changes the state of the NAPI_STATE_SCHED bit. This means
346 * whoever atomically sets that bit can add this napi_struct
347 * to the per-cpu poll_list, and whoever clears that bit
348 * can remove from the list right before clearing the bit.
350 struct list_head poll_list;
354 int (*poll)(struct napi_struct *, int);
355 #ifdef CONFIG_NETPOLL
356 spinlock_t poll_lock;
360 unsigned int gro_count;
362 struct net_device *dev;
363 struct list_head dev_list;
364 struct sk_buff *gro_list;
369 NAPI_STATE_SCHED, /* Poll is scheduled */
370 NAPI_STATE_DISABLE, /* Disable pending */
371 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
381 typedef enum gro_result gro_result_t;
383 extern void __napi_schedule(struct napi_struct *n);
385 static inline int napi_disable_pending(struct napi_struct *n)
387 return test_bit(NAPI_STATE_DISABLE, &n->state);
391 * napi_schedule_prep - check if napi can be scheduled
394 * Test if NAPI routine is already running, and if not mark
395 * it as running. This is used as a condition variable
396 * insure only one NAPI poll instance runs. We also make
397 * sure there is no pending NAPI disable.
399 static inline int napi_schedule_prep(struct napi_struct *n)
401 return !napi_disable_pending(n) &&
402 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
406 * napi_schedule - schedule NAPI poll
409 * Schedule NAPI poll routine to be called if it is not already
412 static inline void napi_schedule(struct napi_struct *n)
414 if (napi_schedule_prep(n))
418 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
419 static inline int napi_reschedule(struct napi_struct *napi)
421 if (napi_schedule_prep(napi)) {
422 __napi_schedule(napi);
429 * napi_complete - NAPI processing complete
432 * Mark NAPI processing as complete.
434 extern void __napi_complete(struct napi_struct *n);
435 extern void napi_complete(struct napi_struct *n);
438 * napi_disable - prevent NAPI from scheduling
441 * Stop NAPI from being scheduled on this context.
442 * Waits till any outstanding processing completes.
444 static inline void napi_disable(struct napi_struct *n)
446 set_bit(NAPI_STATE_DISABLE, &n->state);
447 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
449 clear_bit(NAPI_STATE_DISABLE, &n->state);
453 * napi_enable - enable NAPI scheduling
456 * Resume NAPI from being scheduled on this context.
457 * Must be paired with napi_disable.
459 static inline void napi_enable(struct napi_struct *n)
461 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
462 smp_mb__before_clear_bit();
463 clear_bit(NAPI_STATE_SCHED, &n->state);
468 * napi_synchronize - wait until NAPI is not running
471 * Wait until NAPI is done being scheduled on this context.
472 * Waits till any outstanding processing completes but
473 * does not disable future activations.
475 static inline void napi_synchronize(const struct napi_struct *n)
477 while (test_bit(NAPI_STATE_SCHED, &n->state))
481 # define napi_synchronize(n) barrier()
484 enum netdev_queue_state_t {
486 __QUEUE_STATE_FROZEN,
489 struct netdev_queue {
493 struct net_device *dev;
496 struct Qdisc *qdisc_sleeping;
500 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
503 * please use this field instead of dev->trans_start
505 unsigned long trans_start;
506 unsigned long tx_bytes;
507 unsigned long tx_packets;
508 unsigned long tx_dropped;
509 } ____cacheline_aligned_in_smp;
513 * This structure holds an RPS map which can be of variable length. The
514 * map is an array of CPUs.
521 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
524 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
525 * tail pointer for that CPU's input queue at the time of last enqueue.
527 struct rps_dev_flow {
530 unsigned int last_qtail;
534 * The rps_dev_flow_table structure contains a table of flow mappings.
536 struct rps_dev_flow_table {
539 struct work_struct free_work;
540 struct rps_dev_flow flows[0];
542 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
543 (_num * sizeof(struct rps_dev_flow)))
546 * The rps_sock_flow_table contains mappings of flows to the last CPU
547 * on which they were processed by the application (set in recvmsg).
549 struct rps_sock_flow_table {
553 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
554 (_num * sizeof(u16)))
556 #define RPS_NO_CPU 0xffff
558 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
562 unsigned int cpu, index = hash & table->mask;
564 /* We only give a hint, preemption can change cpu under us */
565 cpu = raw_smp_processor_id();
567 if (table->ents[index] != cpu)
568 table->ents[index] = cpu;
572 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
576 table->ents[hash & table->mask] = RPS_NO_CPU;
579 extern struct rps_sock_flow_table *rps_sock_flow_table;
581 /* This structure contains an instance of an RX queue. */
582 struct netdev_rx_queue {
583 struct rps_map *rps_map;
584 struct rps_dev_flow_table *rps_flow_table;
586 struct netdev_rx_queue *first;
588 } ____cacheline_aligned_in_smp;
589 #endif /* CONFIG_RPS */
592 * This structure defines the management hooks for network devices.
593 * The following hooks can be defined; unless noted otherwise, they are
594 * optional and can be filled with a null pointer.
596 * int (*ndo_init)(struct net_device *dev);
597 * This function is called once when network device is registered.
598 * The network device can use this to any late stage initializaton
599 * or semantic validattion. It can fail with an error code which will
600 * be propogated back to register_netdev
602 * void (*ndo_uninit)(struct net_device *dev);
603 * This function is called when device is unregistered or when registration
604 * fails. It is not called if init fails.
606 * int (*ndo_open)(struct net_device *dev);
607 * This function is called when network device transistions to the up
610 * int (*ndo_stop)(struct net_device *dev);
611 * This function is called when network device transistions to the down
614 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
615 * struct net_device *dev);
616 * Called when a packet needs to be transmitted.
617 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
618 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
619 * Required can not be NULL.
621 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
622 * Called to decide which queue to when device supports multiple
625 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
626 * This function is called to allow device receiver to make
627 * changes to configuration when multicast or promiscious is enabled.
629 * void (*ndo_set_rx_mode)(struct net_device *dev);
630 * This function is called device changes address list filtering.
632 * void (*ndo_set_multicast_list)(struct net_device *dev);
633 * This function is called when the multicast address list changes.
635 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
636 * This function is called when the Media Access Control address
637 * needs to be changed. If this interface is not defined, the
638 * mac address can not be changed.
640 * int (*ndo_validate_addr)(struct net_device *dev);
641 * Test if Media Access Control address is valid for the device.
643 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
644 * Called when a user request an ioctl which can't be handled by
645 * the generic interface code. If not defined ioctl's return
646 * not supported error code.
648 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
649 * Used to set network devices bus interface parameters. This interface
650 * is retained for legacy reason, new devices should use the bus
651 * interface (PCI) for low level management.
653 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
654 * Called when a user wants to change the Maximum Transfer Unit
655 * of a device. If not defined, any request to change MTU will
656 * will return an error.
658 * void (*ndo_tx_timeout)(struct net_device *dev);
659 * Callback uses when the transmitter has not made any progress
660 * for dev->watchdog ticks.
662 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
663 * Called when a user wants to get the network device usage
664 * statistics. If not defined, the counters in dev->stats will
667 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
668 * If device support VLAN receive accleration
669 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
670 * when vlan groups for the device changes. Note: grp is NULL
671 * if no vlan's groups are being used.
673 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
674 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
675 * this function is called when a VLAN id is registered.
677 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
678 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
679 * this function is called when a VLAN id is unregistered.
681 * void (*ndo_poll_controller)(struct net_device *dev);
683 * SR-IOV management functions.
684 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
685 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
686 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
687 * int (*ndo_get_vf_config)(struct net_device *dev,
688 * int vf, struct ifla_vf_info *ivf);
690 #define HAVE_NET_DEVICE_OPS
691 struct net_device_ops {
692 int (*ndo_init)(struct net_device *dev);
693 void (*ndo_uninit)(struct net_device *dev);
694 int (*ndo_open)(struct net_device *dev);
695 int (*ndo_stop)(struct net_device *dev);
696 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
697 struct net_device *dev);
698 u16 (*ndo_select_queue)(struct net_device *dev,
699 struct sk_buff *skb);
700 void (*ndo_change_rx_flags)(struct net_device *dev,
702 void (*ndo_set_rx_mode)(struct net_device *dev);
703 void (*ndo_set_multicast_list)(struct net_device *dev);
704 int (*ndo_set_mac_address)(struct net_device *dev,
706 int (*ndo_validate_addr)(struct net_device *dev);
707 int (*ndo_do_ioctl)(struct net_device *dev,
708 struct ifreq *ifr, int cmd);
709 int (*ndo_set_config)(struct net_device *dev,
711 int (*ndo_change_mtu)(struct net_device *dev,
713 int (*ndo_neigh_setup)(struct net_device *dev,
714 struct neigh_parms *);
715 void (*ndo_tx_timeout) (struct net_device *dev);
717 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
719 void (*ndo_vlan_rx_register)(struct net_device *dev,
720 struct vlan_group *grp);
721 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
723 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
725 #ifdef CONFIG_NET_POLL_CONTROLLER
726 void (*ndo_poll_controller)(struct net_device *dev);
727 void (*ndo_netpoll_cleanup)(struct net_device *dev);
729 int (*ndo_set_vf_mac)(struct net_device *dev,
731 int (*ndo_set_vf_vlan)(struct net_device *dev,
732 int queue, u16 vlan, u8 qos);
733 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
735 int (*ndo_get_vf_config)(struct net_device *dev,
737 struct ifla_vf_info *ivf);
738 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
739 int (*ndo_fcoe_enable)(struct net_device *dev);
740 int (*ndo_fcoe_disable)(struct net_device *dev);
741 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
743 struct scatterlist *sgl,
745 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
747 #define NETDEV_FCOE_WWNN 0
748 #define NETDEV_FCOE_WWPN 1
749 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
755 * The DEVICE structure.
756 * Actually, this whole structure is a big mistake. It mixes I/O
757 * data with strictly "high-level" data, and it has to know about
758 * almost every data structure used in the INET module.
760 * FIXME: cleanup struct net_device such that network protocol info
767 * This is the first field of the "visible" part of this structure
768 * (i.e. as seen by users in the "Space.c" file). It is the name
772 /* device name hash chain */
773 struct hlist_node name_hlist;
778 * I/O specific fields
779 * FIXME: Merge these and struct ifmap into one
781 unsigned long mem_end; /* shared mem end */
782 unsigned long mem_start; /* shared mem start */
783 unsigned long base_addr; /* device I/O address */
784 unsigned int irq; /* device IRQ number */
787 * Some hardware also needs these fields, but they are not
788 * part of the usual set specified in Space.c.
791 unsigned char if_port; /* Selectable AUI, TP,..*/
792 unsigned char dma; /* DMA channel */
796 struct list_head dev_list;
797 struct list_head napi_list;
798 struct list_head unreg_list;
800 /* Net device features */
801 unsigned long features;
802 #define NETIF_F_SG 1 /* Scatter/gather IO. */
803 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
804 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
805 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
806 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
807 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
808 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
809 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
810 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
811 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
812 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
813 #define NETIF_F_GSO 2048 /* Enable software GSO. */
814 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
815 /* do not use LLTX in new drivers */
816 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
817 #define NETIF_F_GRO 16384 /* Generic receive offload */
818 #define NETIF_F_LRO 32768 /* large receive offload */
820 /* the GSO_MASK reserves bits 16 through 23 */
821 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
822 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
823 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
824 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
825 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
827 /* Segmentation offload features */
828 #define NETIF_F_GSO_SHIFT 16
829 #define NETIF_F_GSO_MASK 0x00ff0000
830 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
831 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
832 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
833 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
834 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
835 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
837 /* List of features with software fallbacks. */
838 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
841 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
842 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
843 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
844 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
847 * If one device supports one of these features, then enable them
848 * for all in netdev_increment_features.
850 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
851 NETIF_F_SG | NETIF_F_HIGHDMA | \
854 /* Interface index. Unique device identifier */
858 struct net_device_stats stats;
860 #ifdef CONFIG_WIRELESS_EXT
861 /* List of functions to handle Wireless Extensions (instead of ioctl).
862 * See <net/iw_handler.h> for details. Jean II */
863 const struct iw_handler_def * wireless_handlers;
864 /* Instance data managed by the core of Wireless Extensions. */
865 struct iw_public_data * wireless_data;
867 /* Management operations */
868 const struct net_device_ops *netdev_ops;
869 const struct ethtool_ops *ethtool_ops;
871 /* Hardware header description */
872 const struct header_ops *header_ops;
874 unsigned int flags; /* interface flags (a la BSD) */
875 unsigned short gflags;
876 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
877 unsigned short padded; /* How much padding added by alloc_netdev() */
879 unsigned char operstate; /* RFC2863 operstate */
880 unsigned char link_mode; /* mapping policy to operstate */
882 unsigned int mtu; /* interface MTU value */
883 unsigned short type; /* interface hardware type */
884 unsigned short hard_header_len; /* hardware hdr length */
886 /* extra head- and tailroom the hardware may need, but not in all cases
887 * can this be guaranteed, especially tailroom. Some cases also use
888 * LL_MAX_HEADER instead to allocate the skb.
890 unsigned short needed_headroom;
891 unsigned short needed_tailroom;
893 struct net_device *master; /* Pointer to master device of a group,
894 * which this device is member of.
897 /* Interface address info. */
898 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
899 unsigned char addr_len; /* hardware address length */
900 unsigned short dev_id; /* for shared network cards */
902 spinlock_t addr_list_lock;
903 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
904 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
906 unsigned int promiscuity;
907 unsigned int allmulti;
910 /* Protocol specific pointers */
912 #ifdef CONFIG_NET_DSA
913 void *dsa_ptr; /* dsa specific data */
915 void *atalk_ptr; /* AppleTalk link */
916 void *ip_ptr; /* IPv4 specific data */
917 void *dn_ptr; /* DECnet specific data */
918 void *ip6_ptr; /* IPv6 specific data */
919 void *ec_ptr; /* Econet specific data */
920 void *ax25_ptr; /* AX.25 specific data */
921 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
922 assign before registering */
925 * Cache line mostly used on receive path (including eth_type_trans())
927 unsigned long last_rx; /* Time of last Rx */
928 /* Interface address info used in eth_type_trans() */
929 unsigned char *dev_addr; /* hw address, (before bcast
930 because most packets are
933 struct netdev_hw_addr_list dev_addrs; /* list of device
936 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
939 struct kset *queues_kset;
941 struct netdev_rx_queue *_rx;
943 /* Number of RX queues allocated at alloc_netdev_mq() time */
944 unsigned int num_rx_queues;
947 struct netdev_queue rx_queue;
949 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
951 /* Number of TX queues allocated at alloc_netdev_mq() time */
952 unsigned int num_tx_queues;
954 /* Number of TX queues currently active in device */
955 unsigned int real_num_tx_queues;
957 /* root qdisc from userspace point of view */
960 unsigned long tx_queue_len; /* Max frames per queue allowed */
961 spinlock_t tx_global_lock;
963 * One part is mostly used on xmit path (device)
965 /* These may be needed for future network-power-down code. */
968 * trans_start here is expensive for high speed devices on SMP,
969 * please use netdev_queue->trans_start instead.
971 unsigned long trans_start; /* Time (in jiffies) of last Tx */
973 int watchdog_timeo; /* used by dev_watchdog() */
974 struct timer_list watchdog_timer;
976 /* Number of references to this device */
977 atomic_t refcnt ____cacheline_aligned_in_smp;
979 /* delayed register/unregister */
980 struct list_head todo_list;
981 /* device index hash chain */
982 struct hlist_node index_hlist;
984 struct list_head link_watch_list;
986 /* register/unregister state machine */
987 enum { NETREG_UNINITIALIZED=0,
988 NETREG_REGISTERED, /* completed register_netdevice */
989 NETREG_UNREGISTERING, /* called unregister_netdevice */
990 NETREG_UNREGISTERED, /* completed unregister todo */
991 NETREG_RELEASED, /* called free_netdev */
992 NETREG_DUMMY, /* dummy device for NAPI poll */
996 RTNL_LINK_INITIALIZED,
997 RTNL_LINK_INITIALIZING,
998 } rtnl_link_state:16;
1000 /* Called from unregister, can be used to call free_netdev */
1001 void (*destructor)(struct net_device *dev);
1003 #ifdef CONFIG_NETPOLL
1004 struct netpoll_info *npinfo;
1007 #ifdef CONFIG_NET_NS
1008 /* Network namespace this network device is inside */
1012 /* mid-layer private */
1016 struct net_bridge_port *br_port;
1018 struct macvlan_port *macvlan_port;
1020 struct garp_port *garp_port;
1022 /* class/net/name entry */
1024 /* space for optional device, statistics, and wireless sysfs groups */
1025 const struct attribute_group *sysfs_groups[4];
1027 /* rtnetlink link ops */
1028 const struct rtnl_link_ops *rtnl_link_ops;
1030 /* VLAN feature mask */
1031 unsigned long vlan_features;
1033 /* for setting kernel sock attribute on TCP connection setup */
1034 #define GSO_MAX_SIZE 65536
1035 unsigned int gso_max_size;
1038 /* Data Center Bridging netlink ops */
1039 const struct dcbnl_rtnl_ops *dcbnl_ops;
1042 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1043 /* max exchange id for FCoE LRO by ddp */
1044 unsigned int fcoe_ddp_xid;
1046 /* n-tuple filter list attached to this device */
1047 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1049 #define to_net_dev(d) container_of(d, struct net_device, dev)
1051 #define NETDEV_ALIGN 32
1054 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1057 return &dev->_tx[index];
1060 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1061 void (*f)(struct net_device *,
1062 struct netdev_queue *,
1068 for (i = 0; i < dev->num_tx_queues; i++)
1069 f(dev, &dev->_tx[i], arg);
1073 * Net namespace inlines
1076 struct net *dev_net(const struct net_device *dev)
1078 #ifdef CONFIG_NET_NS
1086 void dev_net_set(struct net_device *dev, struct net *net)
1088 #ifdef CONFIG_NET_NS
1089 release_net(dev->nd_net);
1090 dev->nd_net = hold_net(net);
1094 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1096 #ifdef CONFIG_NET_DSA_TAG_DSA
1097 if (dev->dsa_ptr != NULL)
1098 return dsa_uses_dsa_tags(dev->dsa_ptr);
1104 #ifndef CONFIG_NET_NS
1105 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1109 #else /* CONFIG_NET_NS */
1110 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1113 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1115 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1116 if (dev->dsa_ptr != NULL)
1117 return dsa_uses_trailer_tags(dev->dsa_ptr);
1124 * netdev_priv - access network device private data
1125 * @dev: network device
1127 * Get network device private data
1129 static inline void *netdev_priv(const struct net_device *dev)
1131 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1134 /* Set the sysfs physical device reference for the network logical device
1135 * if set prior to registration will cause a symlink during initialization.
1137 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1139 /* Set the sysfs device type for the network logical device to allow
1140 * fin grained indentification of different network device types. For
1141 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1143 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1146 * netif_napi_add - initialize a napi context
1147 * @dev: network device
1148 * @napi: napi context
1149 * @poll: polling function
1150 * @weight: default weight
1152 * netif_napi_add() must be used to initialize a napi context prior to calling
1153 * *any* of the other napi related functions.
1155 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1156 int (*poll)(struct napi_struct *, int), int weight);
1159 * netif_napi_del - remove a napi context
1160 * @napi: napi context
1162 * netif_napi_del() removes a napi context from the network device napi list
1164 void netif_napi_del(struct napi_struct *napi);
1166 struct napi_gro_cb {
1167 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1170 /* Length of frag0. */
1171 unsigned int frag0_len;
1173 /* This indicates where we are processing relative to skb->data. */
1176 /* This is non-zero if the packet may be of the same flow. */
1179 /* This is non-zero if the packet cannot be merged with the new skb. */
1182 /* Number of segments aggregated. */
1189 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1191 struct packet_type {
1192 __be16 type; /* This is really htons(ether_type). */
1193 struct net_device *dev; /* NULL is wildcarded here */
1194 int (*func) (struct sk_buff *,
1195 struct net_device *,
1196 struct packet_type *,
1197 struct net_device *);
1198 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1200 int (*gso_send_check)(struct sk_buff *skb);
1201 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1202 struct sk_buff *skb);
1203 int (*gro_complete)(struct sk_buff *skb);
1204 void *af_packet_priv;
1205 struct list_head list;
1208 #include <linux/interrupt.h>
1209 #include <linux/notifier.h>
1211 extern rwlock_t dev_base_lock; /* Device list lock */
1214 #define for_each_netdev(net, d) \
1215 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1216 #define for_each_netdev_reverse(net, d) \
1217 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1218 #define for_each_netdev_rcu(net, d) \
1219 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1220 #define for_each_netdev_safe(net, d, n) \
1221 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1222 #define for_each_netdev_continue(net, d) \
1223 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1224 #define for_each_netdev_continue_rcu(net, d) \
1225 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1226 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1228 static inline struct net_device *next_net_device(struct net_device *dev)
1230 struct list_head *lh;
1234 lh = dev->dev_list.next;
1235 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1238 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1240 struct list_head *lh;
1244 lh = rcu_dereference(dev->dev_list.next);
1245 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1248 static inline struct net_device *first_net_device(struct net *net)
1250 return list_empty(&net->dev_base_head) ? NULL :
1251 net_device_entry(net->dev_base_head.next);
1254 extern int netdev_boot_setup_check(struct net_device *dev);
1255 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1256 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1257 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1258 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1259 extern void dev_add_pack(struct packet_type *pt);
1260 extern void dev_remove_pack(struct packet_type *pt);
1261 extern void __dev_remove_pack(struct packet_type *pt);
1263 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1264 unsigned short mask);
1265 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1266 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1267 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1268 extern int dev_alloc_name(struct net_device *dev, const char *name);
1269 extern int dev_open(struct net_device *dev);
1270 extern int dev_close(struct net_device *dev);
1271 extern void dev_disable_lro(struct net_device *dev);
1272 extern int dev_queue_xmit(struct sk_buff *skb);
1273 extern int register_netdevice(struct net_device *dev);
1274 extern void unregister_netdevice_queue(struct net_device *dev,
1275 struct list_head *head);
1276 extern void unregister_netdevice_many(struct list_head *head);
1277 static inline void unregister_netdevice(struct net_device *dev)
1279 unregister_netdevice_queue(dev, NULL);
1282 extern void free_netdev(struct net_device *dev);
1283 extern void synchronize_net(void);
1284 extern int register_netdevice_notifier(struct notifier_block *nb);
1285 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1286 extern int init_dummy_netdev(struct net_device *dev);
1287 extern void netdev_resync_ops(struct net_device *dev);
1289 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1290 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1291 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1292 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1293 extern int dev_restart(struct net_device *dev);
1294 #ifdef CONFIG_NETPOLL_TRAP
1295 extern int netpoll_trap(void);
1297 extern int skb_gro_receive(struct sk_buff **head,
1298 struct sk_buff *skb);
1299 extern void skb_gro_reset_offset(struct sk_buff *skb);
1301 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1303 return NAPI_GRO_CB(skb)->data_offset;
1306 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1308 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1311 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1313 NAPI_GRO_CB(skb)->data_offset += len;
1316 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1317 unsigned int offset)
1319 return NAPI_GRO_CB(skb)->frag0 + offset;
1322 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1324 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1327 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1328 unsigned int offset)
1330 NAPI_GRO_CB(skb)->frag0 = NULL;
1331 NAPI_GRO_CB(skb)->frag0_len = 0;
1332 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1335 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1337 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1340 static inline void *skb_gro_network_header(struct sk_buff *skb)
1342 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1343 skb_network_offset(skb);
1346 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1347 unsigned short type,
1348 const void *daddr, const void *saddr,
1351 if (!dev->header_ops || !dev->header_ops->create)
1354 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1357 static inline int dev_parse_header(const struct sk_buff *skb,
1358 unsigned char *haddr)
1360 const struct net_device *dev = skb->dev;
1362 if (!dev->header_ops || !dev->header_ops->parse)
1364 return dev->header_ops->parse(skb, haddr);
1367 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1368 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1369 static inline int unregister_gifconf(unsigned int family)
1371 return register_gifconf(family, NULL);
1375 * Incoming packets are placed on per-cpu queues
1377 struct softnet_data {
1378 struct Qdisc *output_queue;
1379 struct Qdisc **output_queue_tailp;
1380 struct list_head poll_list;
1381 struct sk_buff *completion_queue;
1382 struct sk_buff_head process_queue;
1385 unsigned int processed;
1386 unsigned int time_squeeze;
1387 unsigned int cpu_collision;
1388 unsigned int received_rps;
1391 struct softnet_data *rps_ipi_list;
1393 /* Elements below can be accessed between CPUs for RPS */
1394 struct call_single_data csd ____cacheline_aligned_in_smp;
1395 struct softnet_data *rps_ipi_next;
1397 unsigned int input_queue_head;
1400 struct sk_buff_head input_pkt_queue;
1401 struct napi_struct backlog;
1404 static inline void input_queue_head_add(struct softnet_data *sd,
1408 sd->input_queue_head += len;
1412 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1414 #define HAVE_NETIF_QUEUE
1416 extern void __netif_schedule(struct Qdisc *q);
1418 static inline void netif_schedule_queue(struct netdev_queue *txq)
1420 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1421 __netif_schedule(txq->qdisc);
1424 static inline void netif_tx_schedule_all(struct net_device *dev)
1428 for (i = 0; i < dev->num_tx_queues; i++)
1429 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1432 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1434 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1438 * netif_start_queue - allow transmit
1439 * @dev: network device
1441 * Allow upper layers to call the device hard_start_xmit routine.
1443 static inline void netif_start_queue(struct net_device *dev)
1445 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1448 static inline void netif_tx_start_all_queues(struct net_device *dev)
1452 for (i = 0; i < dev->num_tx_queues; i++) {
1453 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1454 netif_tx_start_queue(txq);
1458 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1460 #ifdef CONFIG_NETPOLL_TRAP
1461 if (netpoll_trap()) {
1462 netif_tx_start_queue(dev_queue);
1466 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1467 __netif_schedule(dev_queue->qdisc);
1471 * netif_wake_queue - restart transmit
1472 * @dev: network device
1474 * Allow upper layers to call the device hard_start_xmit routine.
1475 * Used for flow control when transmit resources are available.
1477 static inline void netif_wake_queue(struct net_device *dev)
1479 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1482 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1486 for (i = 0; i < dev->num_tx_queues; i++) {
1487 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1488 netif_tx_wake_queue(txq);
1492 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1494 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1498 * netif_stop_queue - stop transmitted packets
1499 * @dev: network device
1501 * Stop upper layers calling the device hard_start_xmit routine.
1502 * Used for flow control when transmit resources are unavailable.
1504 static inline void netif_stop_queue(struct net_device *dev)
1506 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1509 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1513 for (i = 0; i < dev->num_tx_queues; i++) {
1514 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1515 netif_tx_stop_queue(txq);
1519 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1521 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1525 * netif_queue_stopped - test if transmit queue is flowblocked
1526 * @dev: network device
1528 * Test if transmit queue on device is currently unable to send.
1530 static inline int netif_queue_stopped(const struct net_device *dev)
1532 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1535 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1537 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1541 * netif_running - test if up
1542 * @dev: network device
1544 * Test if the device has been brought up.
1546 static inline int netif_running(const struct net_device *dev)
1548 return test_bit(__LINK_STATE_START, &dev->state);
1552 * Routines to manage the subqueues on a device. We only need start
1553 * stop, and a check if it's stopped. All other device management is
1554 * done at the overall netdevice level.
1555 * Also test the device if we're multiqueue.
1559 * netif_start_subqueue - allow sending packets on subqueue
1560 * @dev: network device
1561 * @queue_index: sub queue index
1563 * Start individual transmit queue of a device with multiple transmit queues.
1565 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1567 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1569 netif_tx_start_queue(txq);
1573 * netif_stop_subqueue - stop sending packets on subqueue
1574 * @dev: network device
1575 * @queue_index: sub queue index
1577 * Stop individual transmit queue of a device with multiple transmit queues.
1579 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1581 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1582 #ifdef CONFIG_NETPOLL_TRAP
1586 netif_tx_stop_queue(txq);
1590 * netif_subqueue_stopped - test status of subqueue
1591 * @dev: network device
1592 * @queue_index: sub queue index
1594 * Check individual transmit queue of a device with multiple transmit queues.
1596 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1599 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1601 return netif_tx_queue_stopped(txq);
1604 static inline int netif_subqueue_stopped(const struct net_device *dev,
1605 struct sk_buff *skb)
1607 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1611 * netif_wake_subqueue - allow sending packets on subqueue
1612 * @dev: network device
1613 * @queue_index: sub queue index
1615 * Resume individual transmit queue of a device with multiple transmit queues.
1617 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1619 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1620 #ifdef CONFIG_NETPOLL_TRAP
1624 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1625 __netif_schedule(txq->qdisc);
1629 * netif_is_multiqueue - test if device has multiple transmit queues
1630 * @dev: network device
1632 * Check if device has multiple transmit queues
1634 static inline int netif_is_multiqueue(const struct net_device *dev)
1636 return (dev->num_tx_queues > 1);
1639 /* Use this variant when it is known for sure that it
1640 * is executing from hardware interrupt context or with hardware interrupts
1643 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1645 /* Use this variant in places where it could be invoked
1646 * from either hardware interrupt or other context, with hardware interrupts
1647 * either disabled or enabled.
1649 extern void dev_kfree_skb_any(struct sk_buff *skb);
1651 #define HAVE_NETIF_RX 1
1652 extern int netif_rx(struct sk_buff *skb);
1653 extern int netif_rx_ni(struct sk_buff *skb);
1654 #define HAVE_NETIF_RECEIVE_SKB 1
1655 extern int netif_receive_skb(struct sk_buff *skb);
1656 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1657 struct sk_buff *skb);
1658 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1659 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1660 struct sk_buff *skb);
1661 extern void napi_reuse_skb(struct napi_struct *napi,
1662 struct sk_buff *skb);
1663 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1664 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1665 struct sk_buff *skb,
1667 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1668 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1670 static inline void napi_free_frags(struct napi_struct *napi)
1672 kfree_skb(napi->skb);
1676 extern void netif_nit_deliver(struct sk_buff *skb);
1677 extern int dev_valid_name(const char *name);
1678 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1679 extern int dev_ethtool(struct net *net, struct ifreq *);
1680 extern unsigned dev_get_flags(const struct net_device *);
1681 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1682 extern int dev_change_flags(struct net_device *, unsigned);
1683 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1684 extern int dev_change_name(struct net_device *, const char *);
1685 extern int dev_set_alias(struct net_device *, const char *, size_t);
1686 extern int dev_change_net_namespace(struct net_device *,
1687 struct net *, const char *);
1688 extern int dev_set_mtu(struct net_device *, int);
1689 extern int dev_set_mac_address(struct net_device *,
1691 extern int dev_hard_start_xmit(struct sk_buff *skb,
1692 struct net_device *dev,
1693 struct netdev_queue *txq);
1694 extern int dev_forward_skb(struct net_device *dev,
1695 struct sk_buff *skb);
1697 extern int netdev_budget;
1699 /* Called by rtnetlink.c:rtnl_unlock() */
1700 extern void netdev_run_todo(void);
1703 * dev_put - release reference to device
1704 * @dev: network device
1706 * Release reference to device to allow it to be freed.
1708 static inline void dev_put(struct net_device *dev)
1710 atomic_dec(&dev->refcnt);
1714 * dev_hold - get reference to device
1715 * @dev: network device
1717 * Hold reference to device to keep it from being freed.
1719 static inline void dev_hold(struct net_device *dev)
1721 atomic_inc(&dev->refcnt);
1724 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1725 * and _off may be called from IRQ context, but it is caller
1726 * who is responsible for serialization of these calls.
1728 * The name carrier is inappropriate, these functions should really be
1729 * called netif_lowerlayer_*() because they represent the state of any
1730 * kind of lower layer not just hardware media.
1733 extern void linkwatch_fire_event(struct net_device *dev);
1734 extern void linkwatch_forget_dev(struct net_device *dev);
1737 * netif_carrier_ok - test if carrier present
1738 * @dev: network device
1740 * Check if carrier is present on device
1742 static inline int netif_carrier_ok(const struct net_device *dev)
1744 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1747 extern unsigned long dev_trans_start(struct net_device *dev);
1749 extern void __netdev_watchdog_up(struct net_device *dev);
1751 extern void netif_carrier_on(struct net_device *dev);
1753 extern void netif_carrier_off(struct net_device *dev);
1756 * netif_dormant_on - mark device as dormant.
1757 * @dev: network device
1759 * Mark device as dormant (as per RFC2863).
1761 * The dormant state indicates that the relevant interface is not
1762 * actually in a condition to pass packets (i.e., it is not 'up') but is
1763 * in a "pending" state, waiting for some external event. For "on-
1764 * demand" interfaces, this new state identifies the situation where the
1765 * interface is waiting for events to place it in the up state.
1768 static inline void netif_dormant_on(struct net_device *dev)
1770 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1771 linkwatch_fire_event(dev);
1775 * netif_dormant_off - set device as not dormant.
1776 * @dev: network device
1778 * Device is not in dormant state.
1780 static inline void netif_dormant_off(struct net_device *dev)
1782 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1783 linkwatch_fire_event(dev);
1787 * netif_dormant - test if carrier present
1788 * @dev: network device
1790 * Check if carrier is present on device
1792 static inline int netif_dormant(const struct net_device *dev)
1794 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1799 * netif_oper_up - test if device is operational
1800 * @dev: network device
1802 * Check if carrier is operational
1804 static inline int netif_oper_up(const struct net_device *dev)
1806 return (dev->operstate == IF_OPER_UP ||
1807 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1811 * netif_device_present - is device available or removed
1812 * @dev: network device
1814 * Check if device has not been removed from system.
1816 static inline int netif_device_present(struct net_device *dev)
1818 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1821 extern void netif_device_detach(struct net_device *dev);
1823 extern void netif_device_attach(struct net_device *dev);
1826 * Network interface message level settings
1828 #define HAVE_NETIF_MSG 1
1831 NETIF_MSG_DRV = 0x0001,
1832 NETIF_MSG_PROBE = 0x0002,
1833 NETIF_MSG_LINK = 0x0004,
1834 NETIF_MSG_TIMER = 0x0008,
1835 NETIF_MSG_IFDOWN = 0x0010,
1836 NETIF_MSG_IFUP = 0x0020,
1837 NETIF_MSG_RX_ERR = 0x0040,
1838 NETIF_MSG_TX_ERR = 0x0080,
1839 NETIF_MSG_TX_QUEUED = 0x0100,
1840 NETIF_MSG_INTR = 0x0200,
1841 NETIF_MSG_TX_DONE = 0x0400,
1842 NETIF_MSG_RX_STATUS = 0x0800,
1843 NETIF_MSG_PKTDATA = 0x1000,
1844 NETIF_MSG_HW = 0x2000,
1845 NETIF_MSG_WOL = 0x4000,
1848 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1849 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1850 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1851 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1852 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1853 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1854 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1855 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1856 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1857 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1858 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1859 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1860 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1861 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1862 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1864 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1867 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1868 return default_msg_enable_bits;
1869 if (debug_value == 0) /* no output */
1871 /* set low N bits */
1872 return (1 << debug_value) - 1;
1875 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1877 spin_lock(&txq->_xmit_lock);
1878 txq->xmit_lock_owner = cpu;
1881 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1883 spin_lock_bh(&txq->_xmit_lock);
1884 txq->xmit_lock_owner = smp_processor_id();
1887 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1889 int ok = spin_trylock(&txq->_xmit_lock);
1891 txq->xmit_lock_owner = smp_processor_id();
1895 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1897 txq->xmit_lock_owner = -1;
1898 spin_unlock(&txq->_xmit_lock);
1901 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1903 txq->xmit_lock_owner = -1;
1904 spin_unlock_bh(&txq->_xmit_lock);
1907 static inline void txq_trans_update(struct netdev_queue *txq)
1909 if (txq->xmit_lock_owner != -1)
1910 txq->trans_start = jiffies;
1914 * netif_tx_lock - grab network device transmit lock
1915 * @dev: network device
1917 * Get network device transmit lock
1919 static inline void netif_tx_lock(struct net_device *dev)
1924 spin_lock(&dev->tx_global_lock);
1925 cpu = smp_processor_id();
1926 for (i = 0; i < dev->num_tx_queues; i++) {
1927 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1929 /* We are the only thread of execution doing a
1930 * freeze, but we have to grab the _xmit_lock in
1931 * order to synchronize with threads which are in
1932 * the ->hard_start_xmit() handler and already
1933 * checked the frozen bit.
1935 __netif_tx_lock(txq, cpu);
1936 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1937 __netif_tx_unlock(txq);
1941 static inline void netif_tx_lock_bh(struct net_device *dev)
1947 static inline void netif_tx_unlock(struct net_device *dev)
1951 for (i = 0; i < dev->num_tx_queues; i++) {
1952 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1954 /* No need to grab the _xmit_lock here. If the
1955 * queue is not stopped for another reason, we
1958 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1959 netif_schedule_queue(txq);
1961 spin_unlock(&dev->tx_global_lock);
1964 static inline void netif_tx_unlock_bh(struct net_device *dev)
1966 netif_tx_unlock(dev);
1970 #define HARD_TX_LOCK(dev, txq, cpu) { \
1971 if ((dev->features & NETIF_F_LLTX) == 0) { \
1972 __netif_tx_lock(txq, cpu); \
1976 #define HARD_TX_UNLOCK(dev, txq) { \
1977 if ((dev->features & NETIF_F_LLTX) == 0) { \
1978 __netif_tx_unlock(txq); \
1982 static inline void netif_tx_disable(struct net_device *dev)
1988 cpu = smp_processor_id();
1989 for (i = 0; i < dev->num_tx_queues; i++) {
1990 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1992 __netif_tx_lock(txq, cpu);
1993 netif_tx_stop_queue(txq);
1994 __netif_tx_unlock(txq);
1999 static inline void netif_addr_lock(struct net_device *dev)
2001 spin_lock(&dev->addr_list_lock);
2004 static inline void netif_addr_lock_bh(struct net_device *dev)
2006 spin_lock_bh(&dev->addr_list_lock);
2009 static inline void netif_addr_unlock(struct net_device *dev)
2011 spin_unlock(&dev->addr_list_lock);
2014 static inline void netif_addr_unlock_bh(struct net_device *dev)
2016 spin_unlock_bh(&dev->addr_list_lock);
2020 * dev_addrs walker. Should be used only for read access. Call with
2021 * rcu_read_lock held.
2023 #define for_each_dev_addr(dev, ha) \
2024 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2026 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2028 extern void ether_setup(struct net_device *dev);
2030 /* Support for loadable net-drivers */
2031 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
2032 void (*setup)(struct net_device *),
2033 unsigned int queue_count);
2034 #define alloc_netdev(sizeof_priv, name, setup) \
2035 alloc_netdev_mq(sizeof_priv, name, setup, 1)
2036 extern int register_netdev(struct net_device *dev);
2037 extern void unregister_netdev(struct net_device *dev);
2039 /* General hardware address lists handling functions */
2040 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2041 struct netdev_hw_addr_list *from_list,
2042 int addr_len, unsigned char addr_type);
2043 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2044 struct netdev_hw_addr_list *from_list,
2045 int addr_len, unsigned char addr_type);
2046 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2047 struct netdev_hw_addr_list *from_list,
2049 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2050 struct netdev_hw_addr_list *from_list,
2052 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2053 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2055 /* Functions used for device addresses handling */
2056 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2057 unsigned char addr_type);
2058 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2059 unsigned char addr_type);
2060 extern int dev_addr_add_multiple(struct net_device *to_dev,
2061 struct net_device *from_dev,
2062 unsigned char addr_type);
2063 extern int dev_addr_del_multiple(struct net_device *to_dev,
2064 struct net_device *from_dev,
2065 unsigned char addr_type);
2066 extern void dev_addr_flush(struct net_device *dev);
2067 extern int dev_addr_init(struct net_device *dev);
2069 /* Functions used for unicast addresses handling */
2070 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2071 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2072 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2073 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2074 extern void dev_uc_flush(struct net_device *dev);
2075 extern void dev_uc_init(struct net_device *dev);
2077 /* Functions used for multicast addresses handling */
2078 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2079 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2080 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2081 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2082 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2083 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2084 extern void dev_mc_flush(struct net_device *dev);
2085 extern void dev_mc_init(struct net_device *dev);
2087 /* Functions used for secondary unicast and multicast support */
2088 extern void dev_set_rx_mode(struct net_device *dev);
2089 extern void __dev_set_rx_mode(struct net_device *dev);
2090 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2091 extern int dev_set_allmulti(struct net_device *dev, int inc);
2092 extern void netdev_state_change(struct net_device *dev);
2093 extern int netdev_bonding_change(struct net_device *dev,
2094 unsigned long event);
2095 extern void netdev_features_change(struct net_device *dev);
2096 /* Load a device via the kmod */
2097 extern void dev_load(struct net *net, const char *name);
2098 extern void dev_mcast_init(void);
2099 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
2100 extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
2102 extern int netdev_max_backlog;
2103 extern int netdev_tstamp_prequeue;
2104 extern int weight_p;
2105 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2106 extern int skb_checksum_help(struct sk_buff *skb);
2107 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2109 extern void netdev_rx_csum_fault(struct net_device *dev);
2111 static inline void netdev_rx_csum_fault(struct net_device *dev)
2115 /* rx skb timestamps */
2116 extern void net_enable_timestamp(void);
2117 extern void net_disable_timestamp(void);
2119 #ifdef CONFIG_PROC_FS
2120 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2121 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2122 extern void dev_seq_stop(struct seq_file *seq, void *v);
2125 extern int netdev_class_create_file(struct class_attribute *class_attr);
2126 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2128 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2130 extern void linkwatch_run_queue(void);
2132 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2133 unsigned long mask);
2134 unsigned long netdev_fix_features(unsigned long features, const char *name);
2136 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2137 struct net_device *dev);
2139 static inline int net_gso_ok(int features, int gso_type)
2141 int feature = gso_type << NETIF_F_GSO_SHIFT;
2142 return (features & feature) == feature;
2145 static inline int skb_gso_ok(struct sk_buff *skb, int features)
2147 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2148 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
2151 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2153 return skb_is_gso(skb) &&
2154 (!skb_gso_ok(skb, dev->features) ||
2155 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2158 static inline void netif_set_gso_max_size(struct net_device *dev,
2161 dev->gso_max_size = size;
2164 extern int __skb_bond_should_drop(struct sk_buff *skb,
2165 struct net_device *master);
2167 static inline int skb_bond_should_drop(struct sk_buff *skb,
2168 struct net_device *master)
2171 return __skb_bond_should_drop(skb, master);
2175 extern struct pernet_operations __net_initdata loopback_net_ops;
2177 static inline int dev_ethtool_get_settings(struct net_device *dev,
2178 struct ethtool_cmd *cmd)
2180 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2182 return dev->ethtool_ops->get_settings(dev, cmd);
2185 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2187 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2189 return dev->ethtool_ops->get_rx_csum(dev);
2192 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2194 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2196 return dev->ethtool_ops->get_flags(dev);
2199 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2201 /* netdev_printk helpers, similar to dev_printk */
2203 static inline const char *netdev_name(const struct net_device *dev)
2205 if (dev->reg_state != NETREG_REGISTERED)
2206 return "(unregistered net_device)";
2210 #define netdev_printk(level, netdev, format, args...) \
2211 dev_printk(level, (netdev)->dev.parent, \
2213 netdev_name(netdev), ##args)
2215 #define netdev_emerg(dev, format, args...) \
2216 netdev_printk(KERN_EMERG, dev, format, ##args)
2217 #define netdev_alert(dev, format, args...) \
2218 netdev_printk(KERN_ALERT, dev, format, ##args)
2219 #define netdev_crit(dev, format, args...) \
2220 netdev_printk(KERN_CRIT, dev, format, ##args)
2221 #define netdev_err(dev, format, args...) \
2222 netdev_printk(KERN_ERR, dev, format, ##args)
2223 #define netdev_warn(dev, format, args...) \
2224 netdev_printk(KERN_WARNING, dev, format, ##args)
2225 #define netdev_notice(dev, format, args...) \
2226 netdev_printk(KERN_NOTICE, dev, format, ##args)
2227 #define netdev_info(dev, format, args...) \
2228 netdev_printk(KERN_INFO, dev, format, ##args)
2231 #define netdev_dbg(__dev, format, args...) \
2232 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2233 #elif defined(CONFIG_DYNAMIC_DEBUG)
2234 #define netdev_dbg(__dev, format, args...) \
2236 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2237 netdev_name(__dev), ##args); \
2240 #define netdev_dbg(__dev, format, args...) \
2243 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2248 #if defined(VERBOSE_DEBUG)
2249 #define netdev_vdbg netdev_dbg
2252 #define netdev_vdbg(dev, format, args...) \
2255 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2261 * netdev_WARN() acts like dev_printk(), but with the key difference
2262 * of using a WARN/WARN_ON to get the message out, including the
2263 * file/line information and a backtrace.
2265 #define netdev_WARN(dev, format, args...) \
2266 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2268 /* netif printk helpers, similar to netdev_printk */
2270 #define netif_printk(priv, type, level, dev, fmt, args...) \
2272 if (netif_msg_##type(priv)) \
2273 netdev_printk(level, (dev), fmt, ##args); \
2276 #define netif_emerg(priv, type, dev, fmt, args...) \
2277 netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args)
2278 #define netif_alert(priv, type, dev, fmt, args...) \
2279 netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args)
2280 #define netif_crit(priv, type, dev, fmt, args...) \
2281 netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args)
2282 #define netif_err(priv, type, dev, fmt, args...) \
2283 netif_printk(priv, type, KERN_ERR, dev, fmt, ##args)
2284 #define netif_warn(priv, type, dev, fmt, args...) \
2285 netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args)
2286 #define netif_notice(priv, type, dev, fmt, args...) \
2287 netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args)
2288 #define netif_info(priv, type, dev, fmt, args...) \
2289 netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args)
2292 #define netif_dbg(priv, type, dev, format, args...) \
2293 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2294 #elif defined(CONFIG_DYNAMIC_DEBUG)
2295 #define netif_dbg(priv, type, netdev, format, args...) \
2297 if (netif_msg_##type(priv)) \
2298 dynamic_dev_dbg((netdev)->dev.parent, \
2300 netdev_name(netdev), ##args); \
2303 #define netif_dbg(priv, type, dev, format, args...) \
2306 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2311 #if defined(VERBOSE_DEBUG)
2312 #define netif_vdbg netdev_dbg
2314 #define netif_vdbg(priv, type, dev, format, args...) \
2317 netif_printk(KERN_DEBUG, dev, format, ##args); \
2322 #endif /* __KERNEL__ */
2324 #endif /* _LINUX_NETDEVICE_H */