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
28 #include <linux/pm_qos.h>
29 #include <linux/timer.h>
30 #include <linux/bug.h>
31 #include <linux/delay.h>
32 #include <linux/atomic.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 /* hardware address assignment types */
64 #define NET_ADDR_PERM 0 /* address is permanent (default) */
65 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
66 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
67 #define NET_ADDR_SET 3 /* address is set using
68 * dev_set_mac_address() */
70 /* Backlog congestion levels */
71 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
72 #define NET_RX_DROP 1 /* packet dropped */
75 * Transmit return codes: transmit return codes originate from three different
78 * - qdisc return codes
79 * - driver transmit return codes
82 * Drivers are allowed to return any one of those in their hard_start_xmit()
83 * function. Real network devices commonly used with qdiscs should only return
84 * the driver transmit return codes though - when qdiscs are used, the actual
85 * transmission happens asynchronously, so the value is not propagated to
86 * higher layers. Virtual network devices transmit synchronously, in this case
87 * the driver transmit return codes are consumed by dev_queue_xmit(), all
88 * others are propagated to higher layers.
91 /* qdisc ->enqueue() return codes. */
92 #define NET_XMIT_SUCCESS 0x00
93 #define NET_XMIT_DROP 0x01 /* skb dropped */
94 #define NET_XMIT_CN 0x02 /* congestion notification */
95 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
96 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
98 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
99 * indicates that the device will soon be dropping packets, or already drops
100 * some packets of the same priority; prompting us to send less aggressively. */
101 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
102 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
104 /* Driver transmit return codes */
105 #define NETDEV_TX_MASK 0xf0
108 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
109 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
110 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
111 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
113 typedef enum netdev_tx netdev_tx_t
;
116 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
117 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
119 static inline bool dev_xmit_complete(int rc
)
122 * Positive cases with an skb consumed by a driver:
123 * - successful transmission (rc == NETDEV_TX_OK)
124 * - error while transmitting (rc < 0)
125 * - error while queueing to a different device (rc & NET_XMIT_MASK)
127 if (likely(rc
< NET_XMIT_MASK
))
134 * Compute the worst case header length according to the protocols
138 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
139 # if defined(CONFIG_MAC80211_MESH)
140 # define LL_MAX_HEADER 128
142 # define LL_MAX_HEADER 96
144 #elif IS_ENABLED(CONFIG_TR)
145 # define LL_MAX_HEADER 48
147 # define LL_MAX_HEADER 32
150 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
151 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
152 #define MAX_HEADER LL_MAX_HEADER
154 #define MAX_HEADER (LL_MAX_HEADER + 48)
158 * Old network device statistics. Fields are native words
159 * (unsigned long) so they can be read and written atomically.
162 struct net_device_stats
{
163 unsigned long rx_packets
;
164 unsigned long tx_packets
;
165 unsigned long rx_bytes
;
166 unsigned long tx_bytes
;
167 unsigned long rx_errors
;
168 unsigned long tx_errors
;
169 unsigned long rx_dropped
;
170 unsigned long tx_dropped
;
171 unsigned long multicast
;
172 unsigned long collisions
;
173 unsigned long rx_length_errors
;
174 unsigned long rx_over_errors
;
175 unsigned long rx_crc_errors
;
176 unsigned long rx_frame_errors
;
177 unsigned long rx_fifo_errors
;
178 unsigned long rx_missed_errors
;
179 unsigned long tx_aborted_errors
;
180 unsigned long tx_carrier_errors
;
181 unsigned long tx_fifo_errors
;
182 unsigned long tx_heartbeat_errors
;
183 unsigned long tx_window_errors
;
184 unsigned long rx_compressed
;
185 unsigned long tx_compressed
;
189 #include <linux/cache.h>
190 #include <linux/skbuff.h>
193 #include <linux/static_key.h>
194 extern struct static_key rps_needed
;
201 struct netdev_hw_addr
{
202 struct list_head list
;
203 unsigned char addr
[MAX_ADDR_LEN
];
205 #define NETDEV_HW_ADDR_T_LAN 1
206 #define NETDEV_HW_ADDR_T_SAN 2
207 #define NETDEV_HW_ADDR_T_SLAVE 3
208 #define NETDEV_HW_ADDR_T_UNICAST 4
209 #define NETDEV_HW_ADDR_T_MULTICAST 5
213 struct rcu_head rcu_head
;
216 struct netdev_hw_addr_list
{
217 struct list_head list
;
221 #define netdev_hw_addr_list_count(l) ((l)->count)
222 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
223 #define netdev_hw_addr_list_for_each(ha, l) \
224 list_for_each_entry(ha, &(l)->list, list)
226 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
227 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
228 #define netdev_for_each_uc_addr(ha, dev) \
229 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
231 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
232 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
233 #define netdev_for_each_mc_addr(ha, dev) \
234 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
241 /* cached hardware header; allow for machine alignment needs. */
242 #define HH_DATA_MOD 16
243 #define HH_DATA_OFF(__len) \
244 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
245 #define HH_DATA_ALIGN(__len) \
246 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
247 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
250 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
252 * dev->hard_header_len ? (dev->hard_header_len +
253 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
255 * We could use other alignment values, but we must maintain the
256 * relationship HH alignment <= LL alignment.
258 #define LL_RESERVED_SPACE(dev) \
259 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
260 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
264 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
265 unsigned short type
, const void *daddr
,
266 const void *saddr
, unsigned int len
);
267 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
268 int (*rebuild
)(struct sk_buff
*skb
);
269 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
270 void (*cache_update
)(struct hh_cache
*hh
,
271 const struct net_device
*dev
,
272 const unsigned char *haddr
);
275 /* These flag bits are private to the generic network queueing
276 * layer, they may not be explicitly referenced by any other
280 enum netdev_state_t
{
282 __LINK_STATE_PRESENT
,
283 __LINK_STATE_NOCARRIER
,
284 __LINK_STATE_LINKWATCH_PENDING
,
285 __LINK_STATE_DORMANT
,
290 * This structure holds at boot time configured netdevice settings. They
291 * are then used in the device probing.
293 struct netdev_boot_setup
{
297 #define NETDEV_BOOT_SETUP_MAX 8
299 extern int __init
netdev_boot_setup(char *str
);
302 * Structure for NAPI scheduling similar to tasklet but with weighting
305 /* The poll_list must only be managed by the entity which
306 * changes the state of the NAPI_STATE_SCHED bit. This means
307 * whoever atomically sets that bit can add this napi_struct
308 * to the per-cpu poll_list, and whoever clears that bit
309 * can remove from the list right before clearing the bit.
311 struct list_head poll_list
;
315 unsigned int gro_count
;
316 int (*poll
)(struct napi_struct
*, int);
317 #ifdef CONFIG_NETPOLL
318 spinlock_t poll_lock
;
321 struct net_device
*dev
;
322 struct sk_buff
*gro_list
;
324 struct list_head dev_list
;
328 NAPI_STATE_SCHED
, /* Poll is scheduled */
329 NAPI_STATE_DISABLE
, /* Disable pending */
330 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
340 typedef enum gro_result gro_result_t
;
343 * enum rx_handler_result - Possible return values for rx_handlers.
344 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
346 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
347 * case skb->dev was changed by rx_handler.
348 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
349 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
351 * rx_handlers are functions called from inside __netif_receive_skb(), to do
352 * special processing of the skb, prior to delivery to protocol handlers.
354 * Currently, a net_device can only have a single rx_handler registered. Trying
355 * to register a second rx_handler will return -EBUSY.
357 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
358 * To unregister a rx_handler on a net_device, use
359 * netdev_rx_handler_unregister().
361 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
364 * If the rx_handler consumed to skb in some way, it should return
365 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
366 * the skb to be delivered in some other ways.
368 * If the rx_handler changed skb->dev, to divert the skb to another
369 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
370 * new device will be called if it exists.
372 * If the rx_handler consider the skb should be ignored, it should return
373 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
374 * are registered on exact device (ptype->dev == skb->dev).
376 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
377 * delivered, it should return RX_HANDLER_PASS.
379 * A device without a registered rx_handler will behave as if rx_handler
380 * returned RX_HANDLER_PASS.
383 enum rx_handler_result
{
389 typedef enum rx_handler_result rx_handler_result_t
;
390 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
392 extern void __napi_schedule(struct napi_struct
*n
);
394 static inline bool napi_disable_pending(struct napi_struct
*n
)
396 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
400 * napi_schedule_prep - check if napi can be scheduled
403 * Test if NAPI routine is already running, and if not mark
404 * it as running. This is used as a condition variable
405 * insure only one NAPI poll instance runs. We also make
406 * sure there is no pending NAPI disable.
408 static inline bool napi_schedule_prep(struct napi_struct
*n
)
410 return !napi_disable_pending(n
) &&
411 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
415 * napi_schedule - schedule NAPI poll
418 * Schedule NAPI poll routine to be called if it is not already
421 static inline void napi_schedule(struct napi_struct
*n
)
423 if (napi_schedule_prep(n
))
427 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
428 static inline bool napi_reschedule(struct napi_struct
*napi
)
430 if (napi_schedule_prep(napi
)) {
431 __napi_schedule(napi
);
438 * napi_complete - NAPI processing complete
441 * Mark NAPI processing as complete.
443 extern void __napi_complete(struct napi_struct
*n
);
444 extern void napi_complete(struct napi_struct
*n
);
447 * napi_disable - prevent NAPI from scheduling
450 * Stop NAPI from being scheduled on this context.
451 * Waits till any outstanding processing completes.
453 static inline void napi_disable(struct napi_struct
*n
)
455 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
456 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
458 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
462 * napi_enable - enable NAPI scheduling
465 * Resume NAPI from being scheduled on this context.
466 * Must be paired with napi_disable.
468 static inline void napi_enable(struct napi_struct
*n
)
470 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
471 smp_mb__before_clear_bit();
472 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
477 * napi_synchronize - wait until NAPI is not running
480 * Wait until NAPI is done being scheduled on this context.
481 * Waits till any outstanding processing completes but
482 * does not disable future activations.
484 static inline void napi_synchronize(const struct napi_struct
*n
)
486 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
490 # define napi_synchronize(n) barrier()
493 enum netdev_queue_state_t
{
494 __QUEUE_STATE_DRV_XOFF
,
495 __QUEUE_STATE_STACK_XOFF
,
496 __QUEUE_STATE_FROZEN
,
497 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
498 (1 << __QUEUE_STATE_STACK_XOFF))
499 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
500 (1 << __QUEUE_STATE_FROZEN))
503 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
504 * netif_tx_* functions below are used to manipulate this flag. The
505 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
506 * queue independently. The netif_xmit_*stopped functions below are called
507 * to check if the queue has been stopped by the driver or stack (either
508 * of the XOFF bits are set in the state). Drivers should not need to call
509 * netif_xmit*stopped functions, they should only be using netif_tx_*.
512 struct netdev_queue
{
516 struct net_device
*dev
;
518 struct Qdisc
*qdisc_sleeping
;
522 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
528 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
531 * please use this field instead of dev->trans_start
533 unsigned long trans_start
;
536 * Number of TX timeouts for this queue
537 * (/sys/class/net/DEV/Q/trans_timeout)
539 unsigned long trans_timeout
;
546 } ____cacheline_aligned_in_smp
;
548 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
550 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
557 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
559 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
566 * This structure holds an RPS map which can be of variable length. The
567 * map is an array of CPUs.
574 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
577 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
578 * tail pointer for that CPU's input queue at the time of last enqueue, and
579 * a hardware filter index.
581 struct rps_dev_flow
{
584 unsigned int last_qtail
;
586 #define RPS_NO_FILTER 0xffff
589 * The rps_dev_flow_table structure contains a table of flow mappings.
591 struct rps_dev_flow_table
{
594 struct work_struct free_work
;
595 struct rps_dev_flow flows
[0];
597 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
598 ((_num) * sizeof(struct rps_dev_flow)))
601 * The rps_sock_flow_table contains mappings of flows to the last CPU
602 * on which they were processed by the application (set in recvmsg).
604 struct rps_sock_flow_table
{
608 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
609 ((_num) * sizeof(u16)))
611 #define RPS_NO_CPU 0xffff
613 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
617 unsigned int cpu
, index
= hash
& table
->mask
;
619 /* We only give a hint, preemption can change cpu under us */
620 cpu
= raw_smp_processor_id();
622 if (table
->ents
[index
] != cpu
)
623 table
->ents
[index
] = cpu
;
627 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
631 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
634 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
636 #ifdef CONFIG_RFS_ACCEL
637 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
638 u32 flow_id
, u16 filter_id
);
641 /* This structure contains an instance of an RX queue. */
642 struct netdev_rx_queue
{
643 struct rps_map __rcu
*rps_map
;
644 struct rps_dev_flow_table __rcu
*rps_flow_table
;
646 struct net_device
*dev
;
647 } ____cacheline_aligned_in_smp
;
648 #endif /* CONFIG_RPS */
652 * This structure holds an XPS map which can be of variable length. The
653 * map is an array of queues.
657 unsigned int alloc_len
;
661 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
662 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
666 * This structure holds all XPS maps for device. Maps are indexed by CPU.
668 struct xps_dev_maps
{
670 struct xps_map __rcu
*cpu_map
[0];
672 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
673 (nr_cpu_ids * sizeof(struct xps_map *)))
674 #endif /* CONFIG_XPS */
676 #define TC_MAX_QUEUE 16
677 #define TC_BITMASK 15
678 /* HW offloaded queuing disciplines txq count and offset maps */
679 struct netdev_tc_txq
{
684 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
686 * This structure is to hold information about the device
687 * configured to run FCoE protocol stack.
689 struct netdev_fcoe_hbainfo
{
690 char manufacturer
[64];
691 char serial_number
[64];
692 char hardware_version
[64];
693 char driver_version
[64];
694 char optionrom_version
[64];
695 char firmware_version
[64];
697 char model_description
[256];
702 * This structure defines the management hooks for network devices.
703 * The following hooks can be defined; unless noted otherwise, they are
704 * optional and can be filled with a null pointer.
706 * int (*ndo_init)(struct net_device *dev);
707 * This function is called once when network device is registered.
708 * The network device can use this to any late stage initializaton
709 * or semantic validattion. It can fail with an error code which will
710 * be propogated back to register_netdev
712 * void (*ndo_uninit)(struct net_device *dev);
713 * This function is called when device is unregistered or when registration
714 * fails. It is not called if init fails.
716 * int (*ndo_open)(struct net_device *dev);
717 * This function is called when network device transistions to the up
720 * int (*ndo_stop)(struct net_device *dev);
721 * This function is called when network device transistions to the down
724 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
725 * struct net_device *dev);
726 * Called when a packet needs to be transmitted.
727 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
728 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
729 * Required can not be NULL.
731 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
732 * Called to decide which queue to when device supports multiple
735 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
736 * This function is called to allow device receiver to make
737 * changes to configuration when multicast or promiscious is enabled.
739 * void (*ndo_set_rx_mode)(struct net_device *dev);
740 * This function is called device changes address list filtering.
741 * If driver handles unicast address filtering, it should set
742 * IFF_UNICAST_FLT to its priv_flags.
744 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
745 * This function is called when the Media Access Control address
746 * needs to be changed. If this interface is not defined, the
747 * mac address can not be changed.
749 * int (*ndo_validate_addr)(struct net_device *dev);
750 * Test if Media Access Control address is valid for the device.
752 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
753 * Called when a user request an ioctl which can't be handled by
754 * the generic interface code. If not defined ioctl's return
755 * not supported error code.
757 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
758 * Used to set network devices bus interface parameters. This interface
759 * is retained for legacy reason, new devices should use the bus
760 * interface (PCI) for low level management.
762 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
763 * Called when a user wants to change the Maximum Transfer Unit
764 * of a device. If not defined, any request to change MTU will
765 * will return an error.
767 * void (*ndo_tx_timeout)(struct net_device *dev);
768 * Callback uses when the transmitter has not made any progress
769 * for dev->watchdog ticks.
771 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
772 * struct rtnl_link_stats64 *storage);
773 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
774 * Called when a user wants to get the network device usage
775 * statistics. Drivers must do one of the following:
776 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
777 * rtnl_link_stats64 structure passed by the caller.
778 * 2. Define @ndo_get_stats to update a net_device_stats structure
779 * (which should normally be dev->stats) and return a pointer to
780 * it. The structure may be changed asynchronously only if each
781 * field is written atomically.
782 * 3. Update dev->stats asynchronously and atomically, and define
785 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
786 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
787 * this function is called when a VLAN id is registered.
789 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
790 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
791 * this function is called when a VLAN id is unregistered.
793 * void (*ndo_poll_controller)(struct net_device *dev);
795 * SR-IOV management functions.
796 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
797 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
798 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
799 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
800 * int (*ndo_get_vf_config)(struct net_device *dev,
801 * int vf, struct ifla_vf_info *ivf);
802 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
803 * struct nlattr *port[]);
804 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
805 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
806 * Called to setup 'tc' number of traffic classes in the net device. This
807 * is always called from the stack with the rtnl lock held and netif tx
808 * queues stopped. This allows the netdevice to perform queue management
811 * Fiber Channel over Ethernet (FCoE) offload functions.
812 * int (*ndo_fcoe_enable)(struct net_device *dev);
813 * Called when the FCoE protocol stack wants to start using LLD for FCoE
814 * so the underlying device can perform whatever needed configuration or
815 * initialization to support acceleration of FCoE traffic.
817 * int (*ndo_fcoe_disable)(struct net_device *dev);
818 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
819 * so the underlying device can perform whatever needed clean-ups to
820 * stop supporting acceleration of FCoE traffic.
822 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
823 * struct scatterlist *sgl, unsigned int sgc);
824 * Called when the FCoE Initiator wants to initialize an I/O that
825 * is a possible candidate for Direct Data Placement (DDP). The LLD can
826 * perform necessary setup and returns 1 to indicate the device is set up
827 * successfully to perform DDP on this I/O, otherwise this returns 0.
829 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
830 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
831 * indicated by the FC exchange id 'xid', so the underlying device can
832 * clean up and reuse resources for later DDP requests.
834 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
835 * struct scatterlist *sgl, unsigned int sgc);
836 * Called when the FCoE Target wants to initialize an I/O that
837 * is a possible candidate for Direct Data Placement (DDP). The LLD can
838 * perform necessary setup and returns 1 to indicate the device is set up
839 * successfully to perform DDP on this I/O, otherwise this returns 0.
841 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
842 * struct netdev_fcoe_hbainfo *hbainfo);
843 * Called when the FCoE Protocol stack wants information on the underlying
844 * device. This information is utilized by the FCoE protocol stack to
845 * register attributes with Fiber Channel management service as per the
846 * FC-GS Fabric Device Management Information(FDMI) specification.
848 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
849 * Called when the underlying device wants to override default World Wide
850 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
851 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
852 * protocol stack to use.
855 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
856 * u16 rxq_index, u32 flow_id);
857 * Set hardware filter for RFS. rxq_index is the target queue index;
858 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
859 * Return the filter ID on success, or a negative error code.
861 * Slave management functions (for bridge, bonding, etc).
862 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
863 * Called to make another netdev an underling.
865 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
866 * Called to release previously enslaved netdev.
868 * Feature/offload setting functions.
869 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
870 * netdev_features_t features);
871 * Adjusts the requested feature flags according to device-specific
872 * constraints, and returns the resulting flags. Must not modify
875 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
876 * Called to update device configuration to new features. Passed
877 * feature set might be less than what was returned by ndo_fix_features()).
878 * Must return >0 or -errno if it changed dev->features itself.
880 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
881 * struct net_device *dev,
882 * const unsigned char *addr, u16 flags)
883 * Adds an FDB entry to dev for addr.
884 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev,
885 * const unsigned char *addr)
886 * Deletes the FDB entry from dev coresponding to addr.
887 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
888 * struct net_device *dev, int idx)
889 * Used to add FDB entries to dump requests. Implementers should add
890 * entries to skb and update idx with the number of entries.
892 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
893 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
894 * struct net_device *dev)
896 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
897 * Called to change device carrier. Soft-devices (like dummy, team, etc)
898 * which do not represent real hardware may define this to allow their
899 * userspace components to manage their virtual carrier state. Devices
900 * that determine carrier state from physical hardware properties (eg
901 * network cables) or protocol-dependent mechanisms (eg
902 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
904 struct net_device_ops
{
905 int (*ndo_init
)(struct net_device
*dev
);
906 void (*ndo_uninit
)(struct net_device
*dev
);
907 int (*ndo_open
)(struct net_device
*dev
);
908 int (*ndo_stop
)(struct net_device
*dev
);
909 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
910 struct net_device
*dev
);
911 u16 (*ndo_select_queue
)(struct net_device
*dev
,
912 struct sk_buff
*skb
);
913 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
915 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
916 int (*ndo_set_mac_address
)(struct net_device
*dev
,
918 int (*ndo_validate_addr
)(struct net_device
*dev
);
919 int (*ndo_do_ioctl
)(struct net_device
*dev
,
920 struct ifreq
*ifr
, int cmd
);
921 int (*ndo_set_config
)(struct net_device
*dev
,
923 int (*ndo_change_mtu
)(struct net_device
*dev
,
925 int (*ndo_neigh_setup
)(struct net_device
*dev
,
926 struct neigh_parms
*);
927 void (*ndo_tx_timeout
) (struct net_device
*dev
);
929 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
930 struct rtnl_link_stats64
*storage
);
931 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
933 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
935 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
937 #ifdef CONFIG_NET_POLL_CONTROLLER
938 void (*ndo_poll_controller
)(struct net_device
*dev
);
939 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
940 struct netpoll_info
*info
,
942 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
944 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
946 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
947 int queue
, u16 vlan
, u8 qos
);
948 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
950 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
951 int vf
, bool setting
);
952 int (*ndo_get_vf_config
)(struct net_device
*dev
,
954 struct ifla_vf_info
*ivf
);
955 int (*ndo_set_vf_port
)(struct net_device
*dev
,
957 struct nlattr
*port
[]);
958 int (*ndo_get_vf_port
)(struct net_device
*dev
,
959 int vf
, struct sk_buff
*skb
);
960 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
961 #if IS_ENABLED(CONFIG_FCOE)
962 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
963 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
964 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
966 struct scatterlist
*sgl
,
968 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
970 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
972 struct scatterlist
*sgl
,
974 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
975 struct netdev_fcoe_hbainfo
*hbainfo
);
978 #if IS_ENABLED(CONFIG_LIBFCOE)
979 #define NETDEV_FCOE_WWNN 0
980 #define NETDEV_FCOE_WWPN 1
981 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
985 #ifdef CONFIG_RFS_ACCEL
986 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
987 const struct sk_buff
*skb
,
991 int (*ndo_add_slave
)(struct net_device
*dev
,
992 struct net_device
*slave_dev
);
993 int (*ndo_del_slave
)(struct net_device
*dev
,
994 struct net_device
*slave_dev
);
995 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
996 netdev_features_t features
);
997 int (*ndo_set_features
)(struct net_device
*dev
,
998 netdev_features_t features
);
999 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1000 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1002 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1003 struct nlattr
*tb
[],
1004 struct net_device
*dev
,
1005 const unsigned char *addr
,
1007 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1008 struct net_device
*dev
,
1009 const unsigned char *addr
);
1010 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1011 struct netlink_callback
*cb
,
1012 struct net_device
*dev
,
1015 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1016 struct nlmsghdr
*nlh
);
1017 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1019 struct net_device
*dev
);
1020 int (*ndo_change_carrier
)(struct net_device
*dev
,
1025 * The DEVICE structure.
1026 * Actually, this whole structure is a big mistake. It mixes I/O
1027 * data with strictly "high-level" data, and it has to know about
1028 * almost every data structure used in the INET module.
1030 * FIXME: cleanup struct net_device such that network protocol info
1037 * This is the first field of the "visible" part of this structure
1038 * (i.e. as seen by users in the "Space.c" file). It is the name
1041 char name
[IFNAMSIZ
];
1043 /* device name hash chain, please keep it close to name[] */
1044 struct hlist_node name_hlist
;
1050 * I/O specific fields
1051 * FIXME: Merge these and struct ifmap into one
1053 unsigned long mem_end
; /* shared mem end */
1054 unsigned long mem_start
; /* shared mem start */
1055 unsigned long base_addr
; /* device I/O address */
1056 unsigned int irq
; /* device IRQ number */
1059 * Some hardware also needs these fields, but they are not
1060 * part of the usual set specified in Space.c.
1063 unsigned long state
;
1065 struct list_head dev_list
;
1066 struct list_head napi_list
;
1067 struct list_head unreg_list
;
1069 /* currently active device features */
1070 netdev_features_t features
;
1071 /* user-changeable features */
1072 netdev_features_t hw_features
;
1073 /* user-requested features */
1074 netdev_features_t wanted_features
;
1075 /* mask of features inheritable by VLAN devices */
1076 netdev_features_t vlan_features
;
1077 /* mask of features inherited by encapsulating devices
1078 * This field indicates what encapsulation offloads
1079 * the hardware is capable of doing, and drivers will
1080 * need to set them appropriately.
1082 netdev_features_t hw_enc_features
;
1084 /* Interface index. Unique device identifier */
1088 struct net_device_stats stats
;
1089 atomic_long_t rx_dropped
; /* dropped packets by core network
1090 * Do not use this in drivers.
1093 #ifdef CONFIG_WIRELESS_EXT
1094 /* List of functions to handle Wireless Extensions (instead of ioctl).
1095 * See <net/iw_handler.h> for details. Jean II */
1096 const struct iw_handler_def
* wireless_handlers
;
1097 /* Instance data managed by the core of Wireless Extensions. */
1098 struct iw_public_data
* wireless_data
;
1100 /* Management operations */
1101 const struct net_device_ops
*netdev_ops
;
1102 const struct ethtool_ops
*ethtool_ops
;
1104 /* Hardware header description */
1105 const struct header_ops
*header_ops
;
1107 unsigned int flags
; /* interface flags (a la BSD) */
1108 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1109 * See if.h for definitions. */
1110 unsigned short gflags
;
1111 unsigned short padded
; /* How much padding added by alloc_netdev() */
1113 unsigned char operstate
; /* RFC2863 operstate */
1114 unsigned char link_mode
; /* mapping policy to operstate */
1116 unsigned char if_port
; /* Selectable AUI, TP,..*/
1117 unsigned char dma
; /* DMA channel */
1119 unsigned int mtu
; /* interface MTU value */
1120 unsigned short type
; /* interface hardware type */
1121 unsigned short hard_header_len
; /* hardware hdr length */
1123 /* extra head- and tailroom the hardware may need, but not in all cases
1124 * can this be guaranteed, especially tailroom. Some cases also use
1125 * LL_MAX_HEADER instead to allocate the skb.
1127 unsigned short needed_headroom
;
1128 unsigned short needed_tailroom
;
1130 /* Interface address info. */
1131 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1132 unsigned char addr_assign_type
; /* hw address assignment type */
1133 unsigned char addr_len
; /* hardware address length */
1134 unsigned char neigh_priv_len
;
1135 unsigned short dev_id
; /* for shared network cards */
1137 spinlock_t addr_list_lock
;
1138 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1139 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1141 unsigned int promiscuity
;
1142 unsigned int allmulti
;
1145 /* Protocol specific pointers */
1147 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1148 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1150 #if IS_ENABLED(CONFIG_NET_DSA)
1151 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1153 void *atalk_ptr
; /* AppleTalk link */
1154 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1155 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1156 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1157 void *ax25_ptr
; /* AX.25 specific data */
1158 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1159 assign before registering */
1162 * Cache lines mostly used on receive path (including eth_type_trans())
1164 unsigned long last_rx
; /* Time of last Rx
1165 * This should not be set in
1166 * drivers, unless really needed,
1167 * because network stack (bonding)
1168 * use it if/when necessary, to
1169 * avoid dirtying this cache line.
1172 struct list_head upper_dev_list
; /* List of upper devices */
1174 /* Interface address info used in eth_type_trans() */
1175 unsigned char *dev_addr
; /* hw address, (before bcast
1176 because most packets are
1179 struct netdev_hw_addr_list dev_addrs
; /* list of device
1182 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1185 struct kset
*queues_kset
;
1189 struct netdev_rx_queue
*_rx
;
1191 /* Number of RX queues allocated at register_netdev() time */
1192 unsigned int num_rx_queues
;
1194 /* Number of RX queues currently active in device */
1195 unsigned int real_num_rx_queues
;
1197 #ifdef CONFIG_RFS_ACCEL
1198 /* CPU reverse-mapping for RX completion interrupts, indexed
1199 * by RX queue number. Assigned by driver. This must only be
1200 * set if the ndo_rx_flow_steer operation is defined. */
1201 struct cpu_rmap
*rx_cpu_rmap
;
1205 rx_handler_func_t __rcu
*rx_handler
;
1206 void __rcu
*rx_handler_data
;
1208 struct netdev_queue __rcu
*ingress_queue
;
1211 * Cache lines mostly used on transmit path
1213 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1215 /* Number of TX queues allocated at alloc_netdev_mq() time */
1216 unsigned int num_tx_queues
;
1218 /* Number of TX queues currently active in device */
1219 unsigned int real_num_tx_queues
;
1221 /* root qdisc from userspace point of view */
1222 struct Qdisc
*qdisc
;
1224 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1225 spinlock_t tx_global_lock
;
1228 struct xps_dev_maps __rcu
*xps_maps
;
1231 /* These may be needed for future network-power-down code. */
1234 * trans_start here is expensive for high speed devices on SMP,
1235 * please use netdev_queue->trans_start instead.
1237 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1239 int watchdog_timeo
; /* used by dev_watchdog() */
1240 struct timer_list watchdog_timer
;
1242 /* Number of references to this device */
1243 int __percpu
*pcpu_refcnt
;
1245 /* delayed register/unregister */
1246 struct list_head todo_list
;
1247 /* device index hash chain */
1248 struct hlist_node index_hlist
;
1250 struct list_head link_watch_list
;
1252 /* register/unregister state machine */
1253 enum { NETREG_UNINITIALIZED
=0,
1254 NETREG_REGISTERED
, /* completed register_netdevice */
1255 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1256 NETREG_UNREGISTERED
, /* completed unregister todo */
1257 NETREG_RELEASED
, /* called free_netdev */
1258 NETREG_DUMMY
, /* dummy device for NAPI poll */
1261 bool dismantle
; /* device is going do be freed */
1264 RTNL_LINK_INITIALIZED
,
1265 RTNL_LINK_INITIALIZING
,
1266 } rtnl_link_state
:16;
1268 /* Called from unregister, can be used to call free_netdev */
1269 void (*destructor
)(struct net_device
*dev
);
1271 #ifdef CONFIG_NETPOLL
1272 struct netpoll_info
*npinfo
;
1275 #ifdef CONFIG_NET_NS
1276 /* Network namespace this network device is inside */
1280 /* mid-layer private */
1283 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1284 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1285 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1286 struct pcpu_vstats __percpu
*vstats
; /* veth stats */
1289 struct garp_port __rcu
*garp_port
;
1291 /* class/net/name entry */
1293 /* space for optional device, statistics, and wireless sysfs groups */
1294 const struct attribute_group
*sysfs_groups
[4];
1296 /* rtnetlink link ops */
1297 const struct rtnl_link_ops
*rtnl_link_ops
;
1299 /* for setting kernel sock attribute on TCP connection setup */
1300 #define GSO_MAX_SIZE 65536
1301 unsigned int gso_max_size
;
1302 #define GSO_MAX_SEGS 65535
1306 /* Data Center Bridging netlink ops */
1307 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1310 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1311 u8 prio_tc_map
[TC_BITMASK
+ 1];
1313 #if IS_ENABLED(CONFIG_FCOE)
1314 /* max exchange id for FCoE LRO by ddp */
1315 unsigned int fcoe_ddp_xid
;
1317 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1318 struct netprio_map __rcu
*priomap
;
1320 /* phy device may attach itself for hardware timestamping */
1321 struct phy_device
*phydev
;
1323 struct lock_class_key
*qdisc_tx_busylock
;
1325 /* group the device belongs to */
1328 struct pm_qos_request pm_qos_req
;
1330 #define to_net_dev(d) container_of(d, struct net_device, dev)
1332 #define NETDEV_ALIGN 32
1335 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1337 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1341 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1343 if (tc
>= dev
->num_tc
)
1346 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1351 void netdev_reset_tc(struct net_device
*dev
)
1354 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1355 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1359 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1361 if (tc
>= dev
->num_tc
)
1364 dev
->tc_to_txq
[tc
].count
= count
;
1365 dev
->tc_to_txq
[tc
].offset
= offset
;
1370 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1372 if (num_tc
> TC_MAX_QUEUE
)
1375 dev
->num_tc
= num_tc
;
1380 int netdev_get_num_tc(struct net_device
*dev
)
1386 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1389 return &dev
->_tx
[index
];
1392 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1393 void (*f
)(struct net_device
*,
1394 struct netdev_queue
*,
1400 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1401 f(dev
, &dev
->_tx
[i
], arg
);
1404 extern struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1405 struct sk_buff
*skb
);
1408 * Net namespace inlines
1411 struct net
*dev_net(const struct net_device
*dev
)
1413 return read_pnet(&dev
->nd_net
);
1417 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1419 #ifdef CONFIG_NET_NS
1420 release_net(dev
->nd_net
);
1421 dev
->nd_net
= hold_net(net
);
1425 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1427 #ifdef CONFIG_NET_DSA_TAG_DSA
1428 if (dev
->dsa_ptr
!= NULL
)
1429 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1435 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1437 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1438 if (dev
->dsa_ptr
!= NULL
)
1439 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1446 * netdev_priv - access network device private data
1447 * @dev: network device
1449 * Get network device private data
1451 static inline void *netdev_priv(const struct net_device
*dev
)
1453 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1456 /* Set the sysfs physical device reference for the network logical device
1457 * if set prior to registration will cause a symlink during initialization.
1459 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1461 /* Set the sysfs device type for the network logical device to allow
1462 * fin grained indentification of different network device types. For
1463 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1465 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1468 * netif_napi_add - initialize a napi context
1469 * @dev: network device
1470 * @napi: napi context
1471 * @poll: polling function
1472 * @weight: default weight
1474 * netif_napi_add() must be used to initialize a napi context prior to calling
1475 * *any* of the other napi related functions.
1477 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1478 int (*poll
)(struct napi_struct
*, int), int weight
);
1481 * netif_napi_del - remove a napi context
1482 * @napi: napi context
1484 * netif_napi_del() removes a napi context from the network device napi list
1486 void netif_napi_del(struct napi_struct
*napi
);
1488 struct napi_gro_cb
{
1489 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1492 /* Length of frag0. */
1493 unsigned int frag0_len
;
1495 /* This indicates where we are processing relative to skb->data. */
1498 /* This is non-zero if the packet cannot be merged with the new skb. */
1501 /* Number of segments aggregated. */
1504 /* This is non-zero if the packet may be of the same flow. */
1509 #define NAPI_GRO_FREE 1
1510 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1512 /* jiffies when first packet was created/queued */
1515 /* Used in ipv6_gro_receive() */
1518 /* used in skb_gro_receive() slow path */
1519 struct sk_buff
*last
;
1522 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1524 struct packet_type
{
1525 __be16 type
; /* This is really htons(ether_type). */
1526 struct net_device
*dev
; /* NULL is wildcarded here */
1527 int (*func
) (struct sk_buff
*,
1528 struct net_device
*,
1529 struct packet_type
*,
1530 struct net_device
*);
1531 bool (*id_match
)(struct packet_type
*ptype
,
1533 void *af_packet_priv
;
1534 struct list_head list
;
1537 struct offload_callbacks
{
1538 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1539 netdev_features_t features
);
1540 int (*gso_send_check
)(struct sk_buff
*skb
);
1541 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1542 struct sk_buff
*skb
);
1543 int (*gro_complete
)(struct sk_buff
*skb
);
1546 struct packet_offload
{
1547 __be16 type
; /* This is really htons(ether_type). */
1548 struct offload_callbacks callbacks
;
1549 struct list_head list
;
1552 #include <linux/notifier.h>
1554 /* netdevice notifier chain. Please remember to update the rtnetlink
1555 * notification exclusion list in rtnetlink_event() when adding new
1558 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1559 #define NETDEV_DOWN 0x0002
1560 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1561 detected a hardware crash and restarted
1562 - we can use this eg to kick tcp sessions
1564 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1565 #define NETDEV_REGISTER 0x0005
1566 #define NETDEV_UNREGISTER 0x0006
1567 #define NETDEV_CHANGEMTU 0x0007
1568 #define NETDEV_CHANGEADDR 0x0008
1569 #define NETDEV_GOING_DOWN 0x0009
1570 #define NETDEV_CHANGENAME 0x000A
1571 #define NETDEV_FEAT_CHANGE 0x000B
1572 #define NETDEV_BONDING_FAILOVER 0x000C
1573 #define NETDEV_PRE_UP 0x000D
1574 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1575 #define NETDEV_POST_TYPE_CHANGE 0x000F
1576 #define NETDEV_POST_INIT 0x0010
1577 #define NETDEV_UNREGISTER_FINAL 0x0011
1578 #define NETDEV_RELEASE 0x0012
1579 #define NETDEV_NOTIFY_PEERS 0x0013
1580 #define NETDEV_JOIN 0x0014
1582 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1583 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1584 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1587 extern rwlock_t dev_base_lock
; /* Device list lock */
1589 extern seqcount_t devnet_rename_seq
; /* Device rename seq */
1592 #define for_each_netdev(net, d) \
1593 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1594 #define for_each_netdev_reverse(net, d) \
1595 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1596 #define for_each_netdev_rcu(net, d) \
1597 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1598 #define for_each_netdev_safe(net, d, n) \
1599 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1600 #define for_each_netdev_continue(net, d) \
1601 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1602 #define for_each_netdev_continue_rcu(net, d) \
1603 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1604 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1606 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1608 struct list_head
*lh
;
1612 lh
= dev
->dev_list
.next
;
1613 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1616 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1618 struct list_head
*lh
;
1622 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1623 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1626 static inline struct net_device
*first_net_device(struct net
*net
)
1628 return list_empty(&net
->dev_base_head
) ? NULL
:
1629 net_device_entry(net
->dev_base_head
.next
);
1632 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1634 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1636 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1639 extern int netdev_boot_setup_check(struct net_device
*dev
);
1640 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1641 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1642 const char *hwaddr
);
1643 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1644 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1645 extern void dev_add_pack(struct packet_type
*pt
);
1646 extern void dev_remove_pack(struct packet_type
*pt
);
1647 extern void __dev_remove_pack(struct packet_type
*pt
);
1648 extern void dev_add_offload(struct packet_offload
*po
);
1649 extern void dev_remove_offload(struct packet_offload
*po
);
1650 extern void __dev_remove_offload(struct packet_offload
*po
);
1652 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1653 unsigned short mask
);
1654 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1655 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1656 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1657 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1658 extern int dev_open(struct net_device
*dev
);
1659 extern int dev_close(struct net_device
*dev
);
1660 extern void dev_disable_lro(struct net_device
*dev
);
1661 extern int dev_loopback_xmit(struct sk_buff
*newskb
);
1662 extern int dev_queue_xmit(struct sk_buff
*skb
);
1663 extern int register_netdevice(struct net_device
*dev
);
1664 extern void unregister_netdevice_queue(struct net_device
*dev
,
1665 struct list_head
*head
);
1666 extern void unregister_netdevice_many(struct list_head
*head
);
1667 static inline void unregister_netdevice(struct net_device
*dev
)
1669 unregister_netdevice_queue(dev
, NULL
);
1672 extern int netdev_refcnt_read(const struct net_device
*dev
);
1673 extern void free_netdev(struct net_device
*dev
);
1674 extern void synchronize_net(void);
1675 extern int init_dummy_netdev(struct net_device
*dev
);
1676 extern void netdev_resync_ops(struct net_device
*dev
);
1678 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1679 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1680 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1681 extern int dev_restart(struct net_device
*dev
);
1682 #ifdef CONFIG_NETPOLL_TRAP
1683 extern int netpoll_trap(void);
1685 extern int skb_gro_receive(struct sk_buff
**head
,
1686 struct sk_buff
*skb
);
1688 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1690 return NAPI_GRO_CB(skb
)->data_offset
;
1693 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1695 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1698 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1700 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1703 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1704 unsigned int offset
)
1706 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1709 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1711 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1714 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1715 unsigned int offset
)
1717 if (!pskb_may_pull(skb
, hlen
))
1720 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1721 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1722 return skb
->data
+ offset
;
1725 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1727 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1730 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1732 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1733 skb_network_offset(skb
);
1736 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1737 unsigned short type
,
1738 const void *daddr
, const void *saddr
,
1741 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1744 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1747 static inline int dev_parse_header(const struct sk_buff
*skb
,
1748 unsigned char *haddr
)
1750 const struct net_device
*dev
= skb
->dev
;
1752 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1754 return dev
->header_ops
->parse(skb
, haddr
);
1757 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1758 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1759 static inline int unregister_gifconf(unsigned int family
)
1761 return register_gifconf(family
, NULL
);
1765 * Incoming packets are placed on per-cpu queues
1767 struct softnet_data
{
1768 struct Qdisc
*output_queue
;
1769 struct Qdisc
**output_queue_tailp
;
1770 struct list_head poll_list
;
1771 struct sk_buff
*completion_queue
;
1772 struct sk_buff_head process_queue
;
1775 unsigned int processed
;
1776 unsigned int time_squeeze
;
1777 unsigned int cpu_collision
;
1778 unsigned int received_rps
;
1781 struct softnet_data
*rps_ipi_list
;
1783 /* Elements below can be accessed between CPUs for RPS */
1784 struct call_single_data csd ____cacheline_aligned_in_smp
;
1785 struct softnet_data
*rps_ipi_next
;
1787 unsigned int input_queue_head
;
1788 unsigned int input_queue_tail
;
1790 unsigned int dropped
;
1791 struct sk_buff_head input_pkt_queue
;
1792 struct napi_struct backlog
;
1795 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1798 sd
->input_queue_head
++;
1802 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1803 unsigned int *qtail
)
1806 *qtail
= ++sd
->input_queue_tail
;
1810 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1812 extern void __netif_schedule(struct Qdisc
*q
);
1814 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1816 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1817 __netif_schedule(txq
->qdisc
);
1820 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1824 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1825 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1828 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1830 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1834 * netif_start_queue - allow transmit
1835 * @dev: network device
1837 * Allow upper layers to call the device hard_start_xmit routine.
1839 static inline void netif_start_queue(struct net_device
*dev
)
1841 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1844 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1848 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1849 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1850 netif_tx_start_queue(txq
);
1854 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1856 #ifdef CONFIG_NETPOLL_TRAP
1857 if (netpoll_trap()) {
1858 netif_tx_start_queue(dev_queue
);
1862 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1863 __netif_schedule(dev_queue
->qdisc
);
1867 * netif_wake_queue - restart transmit
1868 * @dev: network device
1870 * Allow upper layers to call the device hard_start_xmit routine.
1871 * Used for flow control when transmit resources are available.
1873 static inline void netif_wake_queue(struct net_device
*dev
)
1875 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1878 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1882 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1883 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1884 netif_tx_wake_queue(txq
);
1888 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1890 if (WARN_ON(!dev_queue
)) {
1891 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1894 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1898 * netif_stop_queue - stop transmitted packets
1899 * @dev: network device
1901 * Stop upper layers calling the device hard_start_xmit routine.
1902 * Used for flow control when transmit resources are unavailable.
1904 static inline void netif_stop_queue(struct net_device
*dev
)
1906 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1909 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1913 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1914 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1915 netif_tx_stop_queue(txq
);
1919 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1921 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1925 * netif_queue_stopped - test if transmit queue is flowblocked
1926 * @dev: network device
1928 * Test if transmit queue on device is currently unable to send.
1930 static inline bool netif_queue_stopped(const struct net_device
*dev
)
1932 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1935 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
1937 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
1940 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
1942 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
1945 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
1949 dql_queued(&dev_queue
->dql
, bytes
);
1951 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
1954 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1957 * The XOFF flag must be set before checking the dql_avail below,
1958 * because in netdev_tx_completed_queue we update the dql_completed
1959 * before checking the XOFF flag.
1963 /* check again in case another CPU has just made room avail */
1964 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
1965 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1969 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
1971 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
1974 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
1975 unsigned int pkts
, unsigned int bytes
)
1978 if (unlikely(!bytes
))
1981 dql_completed(&dev_queue
->dql
, bytes
);
1984 * Without the memory barrier there is a small possiblity that
1985 * netdev_tx_sent_queue will miss the update and cause the queue to
1986 * be stopped forever
1990 if (dql_avail(&dev_queue
->dql
) < 0)
1993 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
1994 netif_schedule_queue(dev_queue
);
1998 static inline void netdev_completed_queue(struct net_device
*dev
,
1999 unsigned int pkts
, unsigned int bytes
)
2001 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2004 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2007 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2012 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2014 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2018 * netif_running - test if up
2019 * @dev: network device
2021 * Test if the device has been brought up.
2023 static inline bool netif_running(const struct net_device
*dev
)
2025 return test_bit(__LINK_STATE_START
, &dev
->state
);
2029 * Routines to manage the subqueues on a device. We only need start
2030 * stop, and a check if it's stopped. All other device management is
2031 * done at the overall netdevice level.
2032 * Also test the device if we're multiqueue.
2036 * netif_start_subqueue - allow sending packets on subqueue
2037 * @dev: network device
2038 * @queue_index: sub queue index
2040 * Start individual transmit queue of a device with multiple transmit queues.
2042 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2044 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2046 netif_tx_start_queue(txq
);
2050 * netif_stop_subqueue - stop sending packets on subqueue
2051 * @dev: network device
2052 * @queue_index: sub queue index
2054 * Stop individual transmit queue of a device with multiple transmit queues.
2056 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2058 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2059 #ifdef CONFIG_NETPOLL_TRAP
2063 netif_tx_stop_queue(txq
);
2067 * netif_subqueue_stopped - test status of subqueue
2068 * @dev: network device
2069 * @queue_index: sub queue index
2071 * Check individual transmit queue of a device with multiple transmit queues.
2073 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2076 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2078 return netif_tx_queue_stopped(txq
);
2081 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2082 struct sk_buff
*skb
)
2084 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2088 * netif_wake_subqueue - allow sending packets on subqueue
2089 * @dev: network device
2090 * @queue_index: sub queue index
2092 * Resume individual transmit queue of a device with multiple transmit queues.
2094 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2096 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2097 #ifdef CONFIG_NETPOLL_TRAP
2101 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2102 __netif_schedule(txq
->qdisc
);
2106 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2107 * as a distribution range limit for the returned value.
2109 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2110 const struct sk_buff
*skb
)
2112 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2116 * netif_is_multiqueue - test if device has multiple transmit queues
2117 * @dev: network device
2119 * Check if device has multiple transmit queues
2121 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2123 return dev
->num_tx_queues
> 1;
2126 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
2130 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
2133 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2140 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2141 const struct net_device
*from_dev
)
2145 err
= netif_set_real_num_tx_queues(to_dev
,
2146 from_dev
->real_num_tx_queues
);
2150 return netif_set_real_num_rx_queues(to_dev
,
2151 from_dev
->real_num_rx_queues
);
2157 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2158 extern int netif_get_num_default_rss_queues(void);
2160 /* Use this variant when it is known for sure that it
2161 * is executing from hardware interrupt context or with hardware interrupts
2164 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2166 /* Use this variant in places where it could be invoked
2167 * from either hardware interrupt or other context, with hardware interrupts
2168 * either disabled or enabled.
2170 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2172 extern int netif_rx(struct sk_buff
*skb
);
2173 extern int netif_rx_ni(struct sk_buff
*skb
);
2174 extern int netif_receive_skb(struct sk_buff
*skb
);
2175 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2176 struct sk_buff
*skb
);
2177 extern void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2178 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2179 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2181 static inline void napi_free_frags(struct napi_struct
*napi
)
2183 kfree_skb(napi
->skb
);
2187 extern int netdev_rx_handler_register(struct net_device
*dev
,
2188 rx_handler_func_t
*rx_handler
,
2189 void *rx_handler_data
);
2190 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2192 extern bool dev_valid_name(const char *name
);
2193 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2194 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2195 extern unsigned int dev_get_flags(const struct net_device
*);
2196 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2197 extern int dev_change_flags(struct net_device
*, unsigned int);
2198 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2199 extern int dev_change_name(struct net_device
*, const char *);
2200 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2201 extern int dev_change_net_namespace(struct net_device
*,
2202 struct net
*, const char *);
2203 extern int dev_set_mtu(struct net_device
*, int);
2204 extern void dev_set_group(struct net_device
*, int);
2205 extern int dev_set_mac_address(struct net_device
*,
2207 extern int dev_change_carrier(struct net_device
*,
2209 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2210 struct net_device
*dev
,
2211 struct netdev_queue
*txq
);
2212 extern int dev_forward_skb(struct net_device
*dev
,
2213 struct sk_buff
*skb
);
2215 extern int netdev_budget
;
2217 /* Called by rtnetlink.c:rtnl_unlock() */
2218 extern void netdev_run_todo(void);
2221 * dev_put - release reference to device
2222 * @dev: network device
2224 * Release reference to device to allow it to be freed.
2226 static inline void dev_put(struct net_device
*dev
)
2228 this_cpu_dec(*dev
->pcpu_refcnt
);
2232 * dev_hold - get reference to device
2233 * @dev: network device
2235 * Hold reference to device to keep it from being freed.
2237 static inline void dev_hold(struct net_device
*dev
)
2239 this_cpu_inc(*dev
->pcpu_refcnt
);
2242 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2243 * and _off may be called from IRQ context, but it is caller
2244 * who is responsible for serialization of these calls.
2246 * The name carrier is inappropriate, these functions should really be
2247 * called netif_lowerlayer_*() because they represent the state of any
2248 * kind of lower layer not just hardware media.
2251 extern void linkwatch_init_dev(struct net_device
*dev
);
2252 extern void linkwatch_fire_event(struct net_device
*dev
);
2253 extern void linkwatch_forget_dev(struct net_device
*dev
);
2256 * netif_carrier_ok - test if carrier present
2257 * @dev: network device
2259 * Check if carrier is present on device
2261 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2263 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2266 extern unsigned long dev_trans_start(struct net_device
*dev
);
2268 extern void __netdev_watchdog_up(struct net_device
*dev
);
2270 extern void netif_carrier_on(struct net_device
*dev
);
2272 extern void netif_carrier_off(struct net_device
*dev
);
2275 * netif_dormant_on - mark device as dormant.
2276 * @dev: network device
2278 * Mark device as dormant (as per RFC2863).
2280 * The dormant state indicates that the relevant interface is not
2281 * actually in a condition to pass packets (i.e., it is not 'up') but is
2282 * in a "pending" state, waiting for some external event. For "on-
2283 * demand" interfaces, this new state identifies the situation where the
2284 * interface is waiting for events to place it in the up state.
2287 static inline void netif_dormant_on(struct net_device
*dev
)
2289 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2290 linkwatch_fire_event(dev
);
2294 * netif_dormant_off - set device as not dormant.
2295 * @dev: network device
2297 * Device is not in dormant state.
2299 static inline void netif_dormant_off(struct net_device
*dev
)
2301 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2302 linkwatch_fire_event(dev
);
2306 * netif_dormant - test if carrier present
2307 * @dev: network device
2309 * Check if carrier is present on device
2311 static inline bool netif_dormant(const struct net_device
*dev
)
2313 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2318 * netif_oper_up - test if device is operational
2319 * @dev: network device
2321 * Check if carrier is operational
2323 static inline bool netif_oper_up(const struct net_device
*dev
)
2325 return (dev
->operstate
== IF_OPER_UP
||
2326 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2330 * netif_device_present - is device available or removed
2331 * @dev: network device
2333 * Check if device has not been removed from system.
2335 static inline bool netif_device_present(struct net_device
*dev
)
2337 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2340 extern void netif_device_detach(struct net_device
*dev
);
2342 extern void netif_device_attach(struct net_device
*dev
);
2345 * Network interface message level settings
2349 NETIF_MSG_DRV
= 0x0001,
2350 NETIF_MSG_PROBE
= 0x0002,
2351 NETIF_MSG_LINK
= 0x0004,
2352 NETIF_MSG_TIMER
= 0x0008,
2353 NETIF_MSG_IFDOWN
= 0x0010,
2354 NETIF_MSG_IFUP
= 0x0020,
2355 NETIF_MSG_RX_ERR
= 0x0040,
2356 NETIF_MSG_TX_ERR
= 0x0080,
2357 NETIF_MSG_TX_QUEUED
= 0x0100,
2358 NETIF_MSG_INTR
= 0x0200,
2359 NETIF_MSG_TX_DONE
= 0x0400,
2360 NETIF_MSG_RX_STATUS
= 0x0800,
2361 NETIF_MSG_PKTDATA
= 0x1000,
2362 NETIF_MSG_HW
= 0x2000,
2363 NETIF_MSG_WOL
= 0x4000,
2366 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2367 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2368 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2369 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2370 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2371 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2372 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2373 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2374 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2375 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2376 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2377 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2378 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2379 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2380 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2382 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2385 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2386 return default_msg_enable_bits
;
2387 if (debug_value
== 0) /* no output */
2389 /* set low N bits */
2390 return (1 << debug_value
) - 1;
2393 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2395 spin_lock(&txq
->_xmit_lock
);
2396 txq
->xmit_lock_owner
= cpu
;
2399 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2401 spin_lock_bh(&txq
->_xmit_lock
);
2402 txq
->xmit_lock_owner
= smp_processor_id();
2405 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2407 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2409 txq
->xmit_lock_owner
= smp_processor_id();
2413 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2415 txq
->xmit_lock_owner
= -1;
2416 spin_unlock(&txq
->_xmit_lock
);
2419 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2421 txq
->xmit_lock_owner
= -1;
2422 spin_unlock_bh(&txq
->_xmit_lock
);
2425 static inline void txq_trans_update(struct netdev_queue
*txq
)
2427 if (txq
->xmit_lock_owner
!= -1)
2428 txq
->trans_start
= jiffies
;
2432 * netif_tx_lock - grab network device transmit lock
2433 * @dev: network device
2435 * Get network device transmit lock
2437 static inline void netif_tx_lock(struct net_device
*dev
)
2442 spin_lock(&dev
->tx_global_lock
);
2443 cpu
= smp_processor_id();
2444 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2445 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2447 /* We are the only thread of execution doing a
2448 * freeze, but we have to grab the _xmit_lock in
2449 * order to synchronize with threads which are in
2450 * the ->hard_start_xmit() handler and already
2451 * checked the frozen bit.
2453 __netif_tx_lock(txq
, cpu
);
2454 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2455 __netif_tx_unlock(txq
);
2459 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2465 static inline void netif_tx_unlock(struct net_device
*dev
)
2469 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2470 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2472 /* No need to grab the _xmit_lock here. If the
2473 * queue is not stopped for another reason, we
2476 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2477 netif_schedule_queue(txq
);
2479 spin_unlock(&dev
->tx_global_lock
);
2482 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2484 netif_tx_unlock(dev
);
2488 #define HARD_TX_LOCK(dev, txq, cpu) { \
2489 if ((dev->features & NETIF_F_LLTX) == 0) { \
2490 __netif_tx_lock(txq, cpu); \
2494 #define HARD_TX_UNLOCK(dev, txq) { \
2495 if ((dev->features & NETIF_F_LLTX) == 0) { \
2496 __netif_tx_unlock(txq); \
2500 static inline void netif_tx_disable(struct net_device
*dev
)
2506 cpu
= smp_processor_id();
2507 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2508 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2510 __netif_tx_lock(txq
, cpu
);
2511 netif_tx_stop_queue(txq
);
2512 __netif_tx_unlock(txq
);
2517 static inline void netif_addr_lock(struct net_device
*dev
)
2519 spin_lock(&dev
->addr_list_lock
);
2522 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2524 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2527 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2529 spin_lock_bh(&dev
->addr_list_lock
);
2532 static inline void netif_addr_unlock(struct net_device
*dev
)
2534 spin_unlock(&dev
->addr_list_lock
);
2537 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2539 spin_unlock_bh(&dev
->addr_list_lock
);
2543 * dev_addrs walker. Should be used only for read access. Call with
2544 * rcu_read_lock held.
2546 #define for_each_dev_addr(dev, ha) \
2547 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2549 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2551 extern void ether_setup(struct net_device
*dev
);
2553 /* Support for loadable net-drivers */
2554 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2555 void (*setup
)(struct net_device
*),
2556 unsigned int txqs
, unsigned int rxqs
);
2557 #define alloc_netdev(sizeof_priv, name, setup) \
2558 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2560 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2561 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2563 extern int register_netdev(struct net_device
*dev
);
2564 extern void unregister_netdev(struct net_device
*dev
);
2566 /* General hardware address lists handling functions */
2567 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2568 struct netdev_hw_addr_list
*from_list
,
2569 int addr_len
, unsigned char addr_type
);
2570 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2571 struct netdev_hw_addr_list
*from_list
,
2572 int addr_len
, unsigned char addr_type
);
2573 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2574 struct netdev_hw_addr_list
*from_list
,
2576 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2577 struct netdev_hw_addr_list
*from_list
,
2579 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2580 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2582 /* Functions used for device addresses handling */
2583 extern int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
2584 unsigned char addr_type
);
2585 extern int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
2586 unsigned char addr_type
);
2587 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2588 struct net_device
*from_dev
,
2589 unsigned char addr_type
);
2590 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2591 struct net_device
*from_dev
,
2592 unsigned char addr_type
);
2593 extern void dev_addr_flush(struct net_device
*dev
);
2594 extern int dev_addr_init(struct net_device
*dev
);
2596 /* Functions used for unicast addresses handling */
2597 extern int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
2598 extern int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2599 extern int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
2600 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2601 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2602 extern void dev_uc_flush(struct net_device
*dev
);
2603 extern void dev_uc_init(struct net_device
*dev
);
2605 /* Functions used for multicast addresses handling */
2606 extern int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
2607 extern int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
2608 extern int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2609 extern int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
2610 extern int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
2611 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2612 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2613 extern void dev_mc_flush(struct net_device
*dev
);
2614 extern void dev_mc_init(struct net_device
*dev
);
2616 /* Functions used for secondary unicast and multicast support */
2617 extern void dev_set_rx_mode(struct net_device
*dev
);
2618 extern void __dev_set_rx_mode(struct net_device
*dev
);
2619 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2620 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2621 extern void netdev_state_change(struct net_device
*dev
);
2622 extern void netdev_notify_peers(struct net_device
*dev
);
2623 extern void netdev_features_change(struct net_device
*dev
);
2624 /* Load a device via the kmod */
2625 extern void dev_load(struct net
*net
, const char *name
);
2626 extern void dev_mcast_init(void);
2627 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2628 struct rtnl_link_stats64
*storage
);
2629 extern void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
2630 const struct net_device_stats
*netdev_stats
);
2632 extern int netdev_max_backlog
;
2633 extern int netdev_tstamp_prequeue
;
2634 extern int weight_p
;
2635 extern int bpf_jit_enable
;
2637 extern bool netdev_has_upper_dev(struct net_device
*dev
,
2638 struct net_device
*upper_dev
);
2639 extern bool netdev_has_any_upper_dev(struct net_device
*dev
);
2640 extern struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
2641 extern struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
2642 extern int netdev_upper_dev_link(struct net_device
*dev
,
2643 struct net_device
*upper_dev
);
2644 extern int netdev_master_upper_dev_link(struct net_device
*dev
,
2645 struct net_device
*upper_dev
);
2646 extern void netdev_upper_dev_unlink(struct net_device
*dev
,
2647 struct net_device
*upper_dev
);
2648 extern int skb_checksum_help(struct sk_buff
*skb
);
2649 extern struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
,
2650 netdev_features_t features
);
2652 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2654 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2658 /* rx skb timestamps */
2659 extern void net_enable_timestamp(void);
2660 extern void net_disable_timestamp(void);
2662 #ifdef CONFIG_PROC_FS
2663 extern void *dev_seq_start(struct seq_file
*seq
, loff_t
*pos
);
2664 extern void *dev_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
);
2665 extern void dev_seq_stop(struct seq_file
*seq
, void *v
);
2668 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2669 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2671 extern struct kobj_ns_type_operations net_ns_type_operations
;
2673 extern const char *netdev_drivername(const struct net_device
*dev
);
2675 extern void linkwatch_run_queue(void);
2677 static inline netdev_features_t
netdev_get_wanted_features(
2678 struct net_device
*dev
)
2680 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2682 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2683 netdev_features_t one
, netdev_features_t mask
);
2684 int __netdev_update_features(struct net_device
*dev
);
2685 void netdev_update_features(struct net_device
*dev
);
2686 void netdev_change_features(struct net_device
*dev
);
2688 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2689 struct net_device
*dev
);
2691 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2693 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
2695 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2697 /* check flags correspondence */
2698 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2699 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2700 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2701 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2702 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2703 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2705 return (features
& feature
) == feature
;
2708 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2710 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2711 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2714 static inline bool netif_needs_gso(struct sk_buff
*skb
,
2715 netdev_features_t features
)
2717 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2718 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
2719 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
2722 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2725 dev
->gso_max_size
= size
;
2728 static inline bool netif_is_bond_slave(struct net_device
*dev
)
2730 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2733 static inline bool netif_supports_nofcs(struct net_device
*dev
)
2735 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
2738 extern struct pernet_operations __net_initdata loopback_net_ops
;
2740 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2742 /* netdev_printk helpers, similar to dev_printk */
2744 static inline const char *netdev_name(const struct net_device
*dev
)
2746 if (dev
->reg_state
!= NETREG_REGISTERED
)
2747 return "(unregistered net_device)";
2751 extern __printf(3, 4)
2752 int netdev_printk(const char *level
, const struct net_device
*dev
,
2753 const char *format
, ...);
2754 extern __printf(2, 3)
2755 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2756 extern __printf(2, 3)
2757 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2758 extern __printf(2, 3)
2759 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2760 extern __printf(2, 3)
2761 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2762 extern __printf(2, 3)
2763 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2764 extern __printf(2, 3)
2765 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2766 extern __printf(2, 3)
2767 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2769 #define MODULE_ALIAS_NETDEV(device) \
2770 MODULE_ALIAS("netdev-" device)
2772 #if defined(CONFIG_DYNAMIC_DEBUG)
2773 #define netdev_dbg(__dev, format, args...) \
2775 dynamic_netdev_dbg(__dev, format, ##args); \
2777 #elif defined(DEBUG)
2778 #define netdev_dbg(__dev, format, args...) \
2779 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2781 #define netdev_dbg(__dev, format, args...) \
2784 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2789 #if defined(VERBOSE_DEBUG)
2790 #define netdev_vdbg netdev_dbg
2793 #define netdev_vdbg(dev, format, args...) \
2796 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2802 * netdev_WARN() acts like dev_printk(), but with the key difference
2803 * of using a WARN/WARN_ON to get the message out, including the
2804 * file/line information and a backtrace.
2806 #define netdev_WARN(dev, format, args...) \
2807 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2809 /* netif printk helpers, similar to netdev_printk */
2811 #define netif_printk(priv, type, level, dev, fmt, args...) \
2813 if (netif_msg_##type(priv)) \
2814 netdev_printk(level, (dev), fmt, ##args); \
2817 #define netif_level(level, priv, type, dev, fmt, args...) \
2819 if (netif_msg_##type(priv)) \
2820 netdev_##level(dev, fmt, ##args); \
2823 #define netif_emerg(priv, type, dev, fmt, args...) \
2824 netif_level(emerg, priv, type, dev, fmt, ##args)
2825 #define netif_alert(priv, type, dev, fmt, args...) \
2826 netif_level(alert, priv, type, dev, fmt, ##args)
2827 #define netif_crit(priv, type, dev, fmt, args...) \
2828 netif_level(crit, priv, type, dev, fmt, ##args)
2829 #define netif_err(priv, type, dev, fmt, args...) \
2830 netif_level(err, priv, type, dev, fmt, ##args)
2831 #define netif_warn(priv, type, dev, fmt, args...) \
2832 netif_level(warn, priv, type, dev, fmt, ##args)
2833 #define netif_notice(priv, type, dev, fmt, args...) \
2834 netif_level(notice, priv, type, dev, fmt, ##args)
2835 #define netif_info(priv, type, dev, fmt, args...) \
2836 netif_level(info, priv, type, dev, fmt, ##args)
2838 #if defined(CONFIG_DYNAMIC_DEBUG)
2839 #define netif_dbg(priv, type, netdev, format, args...) \
2841 if (netif_msg_##type(priv)) \
2842 dynamic_netdev_dbg(netdev, format, ##args); \
2844 #elif defined(DEBUG)
2845 #define netif_dbg(priv, type, dev, format, args...) \
2846 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2848 #define netif_dbg(priv, type, dev, format, args...) \
2851 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2856 #if defined(VERBOSE_DEBUG)
2857 #define netif_vdbg netif_dbg
2859 #define netif_vdbg(priv, type, dev, format, args...) \
2862 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2867 #endif /* _LINUX_NETDEVICE_H */