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 extern void netdev_set_default_ethtool_ops(struct net_device
*dev
,
64 const struct ethtool_ops
*ops
);
66 /* hardware address assignment types */
67 #define NET_ADDR_PERM 0 /* address is permanent (default) */
68 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
69 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
70 #define NET_ADDR_SET 3 /* address is set using
71 * dev_set_mac_address() */
73 /* Backlog congestion levels */
74 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
75 #define NET_RX_DROP 1 /* packet dropped */
78 * Transmit return codes: transmit return codes originate from three different
81 * - qdisc return codes
82 * - driver transmit return codes
85 * Drivers are allowed to return any one of those in their hard_start_xmit()
86 * function. Real network devices commonly used with qdiscs should only return
87 * the driver transmit return codes though - when qdiscs are used, the actual
88 * transmission happens asynchronously, so the value is not propagated to
89 * higher layers. Virtual network devices transmit synchronously, in this case
90 * the driver transmit return codes are consumed by dev_queue_xmit(), all
91 * others are propagated to higher layers.
94 /* qdisc ->enqueue() return codes. */
95 #define NET_XMIT_SUCCESS 0x00
96 #define NET_XMIT_DROP 0x01 /* skb dropped */
97 #define NET_XMIT_CN 0x02 /* congestion notification */
98 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
99 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
101 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
102 * indicates that the device will soon be dropping packets, or already drops
103 * some packets of the same priority; prompting us to send less aggressively. */
104 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
105 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
107 /* Driver transmit return codes */
108 #define NETDEV_TX_MASK 0xf0
111 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
112 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
113 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
114 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
116 typedef enum netdev_tx netdev_tx_t
;
119 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
120 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
122 static inline bool dev_xmit_complete(int rc
)
125 * Positive cases with an skb consumed by a driver:
126 * - successful transmission (rc == NETDEV_TX_OK)
127 * - error while transmitting (rc < 0)
128 * - error while queueing to a different device (rc & NET_XMIT_MASK)
130 if (likely(rc
< NET_XMIT_MASK
))
137 * Compute the worst case header length according to the protocols
141 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
148 # define LL_MAX_HEADER 32
151 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
152 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
153 #define MAX_HEADER LL_MAX_HEADER
155 #define MAX_HEADER (LL_MAX_HEADER + 48)
159 * Old network device statistics. Fields are native words
160 * (unsigned long) so they can be read and written atomically.
163 struct net_device_stats
{
164 unsigned long rx_packets
;
165 unsigned long tx_packets
;
166 unsigned long rx_bytes
;
167 unsigned long tx_bytes
;
168 unsigned long rx_errors
;
169 unsigned long tx_errors
;
170 unsigned long rx_dropped
;
171 unsigned long tx_dropped
;
172 unsigned long multicast
;
173 unsigned long collisions
;
174 unsigned long rx_length_errors
;
175 unsigned long rx_over_errors
;
176 unsigned long rx_crc_errors
;
177 unsigned long rx_frame_errors
;
178 unsigned long rx_fifo_errors
;
179 unsigned long rx_missed_errors
;
180 unsigned long tx_aborted_errors
;
181 unsigned long tx_carrier_errors
;
182 unsigned long tx_fifo_errors
;
183 unsigned long tx_heartbeat_errors
;
184 unsigned long tx_window_errors
;
185 unsigned long rx_compressed
;
186 unsigned long tx_compressed
;
190 #include <linux/cache.h>
191 #include <linux/skbuff.h>
194 #include <linux/static_key.h>
195 extern struct static_key rps_needed
;
202 struct netdev_hw_addr
{
203 struct list_head list
;
204 unsigned char addr
[MAX_ADDR_LEN
];
206 #define NETDEV_HW_ADDR_T_LAN 1
207 #define NETDEV_HW_ADDR_T_SAN 2
208 #define NETDEV_HW_ADDR_T_SLAVE 3
209 #define NETDEV_HW_ADDR_T_UNICAST 4
210 #define NETDEV_HW_ADDR_T_MULTICAST 5
215 struct rcu_head rcu_head
;
218 struct netdev_hw_addr_list
{
219 struct list_head list
;
223 #define netdev_hw_addr_list_count(l) ((l)->count)
224 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
225 #define netdev_hw_addr_list_for_each(ha, l) \
226 list_for_each_entry(ha, &(l)->list, list)
228 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
229 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
230 #define netdev_for_each_uc_addr(ha, dev) \
231 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
233 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
234 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
235 #define netdev_for_each_mc_addr(ha, dev) \
236 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 #define LL_RESERVED_SPACE(dev) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
267 unsigned short type
, const void *daddr
,
268 const void *saddr
, unsigned int len
);
269 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
270 int (*rebuild
)(struct sk_buff
*skb
);
271 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
272 void (*cache_update
)(struct hh_cache
*hh
,
273 const struct net_device
*dev
,
274 const unsigned char *haddr
);
277 /* These flag bits are private to the generic network queueing
278 * layer, they may not be explicitly referenced by any other
282 enum netdev_state_t
{
284 __LINK_STATE_PRESENT
,
285 __LINK_STATE_NOCARRIER
,
286 __LINK_STATE_LINKWATCH_PENDING
,
287 __LINK_STATE_DORMANT
,
292 * This structure holds at boot time configured netdevice settings. They
293 * are then used in the device probing.
295 struct netdev_boot_setup
{
299 #define NETDEV_BOOT_SETUP_MAX 8
301 extern int __init
netdev_boot_setup(char *str
);
304 * Structure for NAPI scheduling similar to tasklet but with weighting
307 /* The poll_list must only be managed by the entity which
308 * changes the state of the NAPI_STATE_SCHED bit. This means
309 * whoever atomically sets that bit can add this napi_struct
310 * to the per-cpu poll_list, and whoever clears that bit
311 * can remove from the list right before clearing the bit.
313 struct list_head poll_list
;
317 unsigned int gro_count
;
318 int (*poll
)(struct napi_struct
*, int);
319 #ifdef CONFIG_NETPOLL
320 spinlock_t poll_lock
;
323 struct net_device
*dev
;
324 struct sk_buff
*gro_list
;
326 struct list_head dev_list
;
330 NAPI_STATE_SCHED
, /* Poll is scheduled */
331 NAPI_STATE_DISABLE
, /* Disable pending */
332 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
342 typedef enum gro_result gro_result_t
;
345 * enum rx_handler_result - Possible return values for rx_handlers.
346 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
348 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
349 * case skb->dev was changed by rx_handler.
350 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
351 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
353 * rx_handlers are functions called from inside __netif_receive_skb(), to do
354 * special processing of the skb, prior to delivery to protocol handlers.
356 * Currently, a net_device can only have a single rx_handler registered. Trying
357 * to register a second rx_handler will return -EBUSY.
359 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
360 * To unregister a rx_handler on a net_device, use
361 * netdev_rx_handler_unregister().
363 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
366 * If the rx_handler consumed to skb in some way, it should return
367 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
368 * the skb to be delivered in some other ways.
370 * If the rx_handler changed skb->dev, to divert the skb to another
371 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
372 * new device will be called if it exists.
374 * If the rx_handler consider the skb should be ignored, it should return
375 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
376 * are registered on exact device (ptype->dev == skb->dev).
378 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
379 * delivered, it should return RX_HANDLER_PASS.
381 * A device without a registered rx_handler will behave as if rx_handler
382 * returned RX_HANDLER_PASS.
385 enum rx_handler_result
{
391 typedef enum rx_handler_result rx_handler_result_t
;
392 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
394 extern void __napi_schedule(struct napi_struct
*n
);
396 static inline bool napi_disable_pending(struct napi_struct
*n
)
398 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
402 * napi_schedule_prep - check if napi can be scheduled
405 * Test if NAPI routine is already running, and if not mark
406 * it as running. This is used as a condition variable
407 * insure only one NAPI poll instance runs. We also make
408 * sure there is no pending NAPI disable.
410 static inline bool napi_schedule_prep(struct napi_struct
*n
)
412 return !napi_disable_pending(n
) &&
413 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
417 * napi_schedule - schedule NAPI poll
420 * Schedule NAPI poll routine to be called if it is not already
423 static inline void napi_schedule(struct napi_struct
*n
)
425 if (napi_schedule_prep(n
))
429 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
430 static inline bool napi_reschedule(struct napi_struct
*napi
)
432 if (napi_schedule_prep(napi
)) {
433 __napi_schedule(napi
);
440 * napi_complete - NAPI processing complete
443 * Mark NAPI processing as complete.
445 extern void __napi_complete(struct napi_struct
*n
);
446 extern void napi_complete(struct napi_struct
*n
);
449 * napi_disable - prevent NAPI from scheduling
452 * Stop NAPI from being scheduled on this context.
453 * Waits till any outstanding processing completes.
455 static inline void napi_disable(struct napi_struct
*n
)
457 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
458 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
460 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
464 * napi_enable - enable NAPI scheduling
467 * Resume NAPI from being scheduled on this context.
468 * Must be paired with napi_disable.
470 static inline void napi_enable(struct napi_struct
*n
)
472 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
473 smp_mb__before_clear_bit();
474 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
479 * napi_synchronize - wait until NAPI is not running
482 * Wait until NAPI is done being scheduled on this context.
483 * Waits till any outstanding processing completes but
484 * does not disable future activations.
486 static inline void napi_synchronize(const struct napi_struct
*n
)
488 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
492 # define napi_synchronize(n) barrier()
495 enum netdev_queue_state_t
{
496 __QUEUE_STATE_DRV_XOFF
,
497 __QUEUE_STATE_STACK_XOFF
,
498 __QUEUE_STATE_FROZEN
,
499 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
500 (1 << __QUEUE_STATE_STACK_XOFF))
501 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
502 (1 << __QUEUE_STATE_FROZEN))
505 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
506 * netif_tx_* functions below are used to manipulate this flag. The
507 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
508 * queue independently. The netif_xmit_*stopped functions below are called
509 * to check if the queue has been stopped by the driver or stack (either
510 * of the XOFF bits are set in the state). Drivers should not need to call
511 * netif_xmit*stopped functions, they should only be using netif_tx_*.
514 struct netdev_queue
{
518 struct net_device
*dev
;
520 struct Qdisc
*qdisc_sleeping
;
524 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
530 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
533 * please use this field instead of dev->trans_start
535 unsigned long trans_start
;
538 * Number of TX timeouts for this queue
539 * (/sys/class/net/DEV/Q/trans_timeout)
541 unsigned long trans_timeout
;
548 } ____cacheline_aligned_in_smp
;
550 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
552 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
559 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
561 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
568 * This structure holds an RPS map which can be of variable length. The
569 * map is an array of CPUs.
576 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
579 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
580 * tail pointer for that CPU's input queue at the time of last enqueue, and
581 * a hardware filter index.
583 struct rps_dev_flow
{
586 unsigned int last_qtail
;
588 #define RPS_NO_FILTER 0xffff
591 * The rps_dev_flow_table structure contains a table of flow mappings.
593 struct rps_dev_flow_table
{
596 struct work_struct free_work
;
597 struct rps_dev_flow flows
[0];
599 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
600 ((_num) * sizeof(struct rps_dev_flow)))
603 * The rps_sock_flow_table contains mappings of flows to the last CPU
604 * on which they were processed by the application (set in recvmsg).
606 struct rps_sock_flow_table
{
610 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
611 ((_num) * sizeof(u16)))
613 #define RPS_NO_CPU 0xffff
615 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
619 unsigned int cpu
, index
= hash
& table
->mask
;
621 /* We only give a hint, preemption can change cpu under us */
622 cpu
= raw_smp_processor_id();
624 if (table
->ents
[index
] != cpu
)
625 table
->ents
[index
] = cpu
;
629 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
633 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
636 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
638 #ifdef CONFIG_RFS_ACCEL
639 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
640 u32 flow_id
, u16 filter_id
);
643 /* This structure contains an instance of an RX queue. */
644 struct netdev_rx_queue
{
645 struct rps_map __rcu
*rps_map
;
646 struct rps_dev_flow_table __rcu
*rps_flow_table
;
648 struct net_device
*dev
;
649 } ____cacheline_aligned_in_smp
;
650 #endif /* CONFIG_RPS */
654 * This structure holds an XPS map which can be of variable length. The
655 * map is an array of queues.
659 unsigned int alloc_len
;
663 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
664 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
668 * This structure holds all XPS maps for device. Maps are indexed by CPU.
670 struct xps_dev_maps
{
672 struct xps_map __rcu
*cpu_map
[0];
674 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
675 (nr_cpu_ids * sizeof(struct xps_map *)))
676 #endif /* CONFIG_XPS */
678 #define TC_MAX_QUEUE 16
679 #define TC_BITMASK 15
680 /* HW offloaded queuing disciplines txq count and offset maps */
681 struct netdev_tc_txq
{
686 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
688 * This structure is to hold information about the device
689 * configured to run FCoE protocol stack.
691 struct netdev_fcoe_hbainfo
{
692 char manufacturer
[64];
693 char serial_number
[64];
694 char hardware_version
[64];
695 char driver_version
[64];
696 char optionrom_version
[64];
697 char firmware_version
[64];
699 char model_description
[256];
704 * This structure defines the management hooks for network devices.
705 * The following hooks can be defined; unless noted otherwise, they are
706 * optional and can be filled with a null pointer.
708 * int (*ndo_init)(struct net_device *dev);
709 * This function is called once when network device is registered.
710 * The network device can use this to any late stage initializaton
711 * or semantic validattion. It can fail with an error code which will
712 * be propogated back to register_netdev
714 * void (*ndo_uninit)(struct net_device *dev);
715 * This function is called when device is unregistered or when registration
716 * fails. It is not called if init fails.
718 * int (*ndo_open)(struct net_device *dev);
719 * This function is called when network device transistions to the up
722 * int (*ndo_stop)(struct net_device *dev);
723 * This function is called when network device transistions to the down
726 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
727 * struct net_device *dev);
728 * Called when a packet needs to be transmitted.
729 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
730 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
731 * Required can not be NULL.
733 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
734 * Called to decide which queue to when device supports multiple
737 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
738 * This function is called to allow device receiver to make
739 * changes to configuration when multicast or promiscious is enabled.
741 * void (*ndo_set_rx_mode)(struct net_device *dev);
742 * This function is called device changes address list filtering.
743 * If driver handles unicast address filtering, it should set
744 * IFF_UNICAST_FLT to its priv_flags.
746 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
747 * This function is called when the Media Access Control address
748 * needs to be changed. If this interface is not defined, the
749 * mac address can not be changed.
751 * int (*ndo_validate_addr)(struct net_device *dev);
752 * Test if Media Access Control address is valid for the device.
754 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
755 * Called when a user request an ioctl which can't be handled by
756 * the generic interface code. If not defined ioctl's return
757 * not supported error code.
759 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
760 * Used to set network devices bus interface parameters. This interface
761 * is retained for legacy reason, new devices should use the bus
762 * interface (PCI) for low level management.
764 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
765 * Called when a user wants to change the Maximum Transfer Unit
766 * of a device. If not defined, any request to change MTU will
767 * will return an error.
769 * void (*ndo_tx_timeout)(struct net_device *dev);
770 * Callback uses when the transmitter has not made any progress
771 * for dev->watchdog ticks.
773 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
774 * struct rtnl_link_stats64 *storage);
775 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
776 * Called when a user wants to get the network device usage
777 * statistics. Drivers must do one of the following:
778 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
779 * rtnl_link_stats64 structure passed by the caller.
780 * 2. Define @ndo_get_stats to update a net_device_stats structure
781 * (which should normally be dev->stats) and return a pointer to
782 * it. The structure may be changed asynchronously only if each
783 * field is written atomically.
784 * 3. Update dev->stats asynchronously and atomically, and define
787 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
788 * If device support VLAN filtering this function is called when a
789 * VLAN id is registered.
791 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
792 * If device support VLAN filtering this function is called when a
793 * VLAN id is unregistered.
795 * void (*ndo_poll_controller)(struct net_device *dev);
797 * SR-IOV management functions.
798 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
799 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
800 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
801 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
802 * int (*ndo_get_vf_config)(struct net_device *dev,
803 * int vf, struct ifla_vf_info *ivf);
804 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
805 * struct nlattr *port[]);
806 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
807 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
808 * Called to setup 'tc' number of traffic classes in the net device. This
809 * is always called from the stack with the rtnl lock held and netif tx
810 * queues stopped. This allows the netdevice to perform queue management
813 * Fiber Channel over Ethernet (FCoE) offload functions.
814 * int (*ndo_fcoe_enable)(struct net_device *dev);
815 * Called when the FCoE protocol stack wants to start using LLD for FCoE
816 * so the underlying device can perform whatever needed configuration or
817 * initialization to support acceleration of FCoE traffic.
819 * int (*ndo_fcoe_disable)(struct net_device *dev);
820 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
821 * so the underlying device can perform whatever needed clean-ups to
822 * stop supporting acceleration of FCoE traffic.
824 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
825 * struct scatterlist *sgl, unsigned int sgc);
826 * Called when the FCoE Initiator wants to initialize an I/O that
827 * is a possible candidate for Direct Data Placement (DDP). The LLD can
828 * perform necessary setup and returns 1 to indicate the device is set up
829 * successfully to perform DDP on this I/O, otherwise this returns 0.
831 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
832 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
833 * indicated by the FC exchange id 'xid', so the underlying device can
834 * clean up and reuse resources for later DDP requests.
836 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
837 * struct scatterlist *sgl, unsigned int sgc);
838 * Called when the FCoE Target wants to initialize an I/O that
839 * is a possible candidate for Direct Data Placement (DDP). The LLD can
840 * perform necessary setup and returns 1 to indicate the device is set up
841 * successfully to perform DDP on this I/O, otherwise this returns 0.
843 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
844 * struct netdev_fcoe_hbainfo *hbainfo);
845 * Called when the FCoE Protocol stack wants information on the underlying
846 * device. This information is utilized by the FCoE protocol stack to
847 * register attributes with Fiber Channel management service as per the
848 * FC-GS Fabric Device Management Information(FDMI) specification.
850 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
851 * Called when the underlying device wants to override default World Wide
852 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
853 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
854 * protocol stack to use.
857 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
858 * u16 rxq_index, u32 flow_id);
859 * Set hardware filter for RFS. rxq_index is the target queue index;
860 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
861 * Return the filter ID on success, or a negative error code.
863 * Slave management functions (for bridge, bonding, etc).
864 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
865 * Called to make another netdev an underling.
867 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
868 * Called to release previously enslaved netdev.
870 * Feature/offload setting functions.
871 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
872 * netdev_features_t features);
873 * Adjusts the requested feature flags according to device-specific
874 * constraints, and returns the resulting flags. Must not modify
877 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
878 * Called to update device configuration to new features. Passed
879 * feature set might be less than what was returned by ndo_fix_features()).
880 * Must return >0 or -errno if it changed dev->features itself.
882 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
883 * struct net_device *dev,
884 * const unsigned char *addr, u16 flags)
885 * Adds an FDB entry to dev for addr.
886 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
887 * struct net_device *dev,
888 * const unsigned char *addr)
889 * Deletes the FDB entry from dev coresponding to addr.
890 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
891 * struct net_device *dev, int idx)
892 * Used to add FDB entries to dump requests. Implementers should add
893 * entries to skb and update idx with the number of entries.
895 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
896 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
897 * struct net_device *dev, u32 filter_mask)
899 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
900 * Called to change device carrier. Soft-devices (like dummy, team, etc)
901 * which do not represent real hardware may define this to allow their
902 * userspace components to manage their virtual carrier state. Devices
903 * that determine carrier state from physical hardware properties (eg
904 * network cables) or protocol-dependent mechanisms (eg
905 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
907 struct net_device_ops
{
908 int (*ndo_init
)(struct net_device
*dev
);
909 void (*ndo_uninit
)(struct net_device
*dev
);
910 int (*ndo_open
)(struct net_device
*dev
);
911 int (*ndo_stop
)(struct net_device
*dev
);
912 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
913 struct net_device
*dev
);
914 u16 (*ndo_select_queue
)(struct net_device
*dev
,
915 struct sk_buff
*skb
);
916 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
918 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
919 int (*ndo_set_mac_address
)(struct net_device
*dev
,
921 int (*ndo_validate_addr
)(struct net_device
*dev
);
922 int (*ndo_do_ioctl
)(struct net_device
*dev
,
923 struct ifreq
*ifr
, int cmd
);
924 int (*ndo_set_config
)(struct net_device
*dev
,
926 int (*ndo_change_mtu
)(struct net_device
*dev
,
928 int (*ndo_neigh_setup
)(struct net_device
*dev
,
929 struct neigh_parms
*);
930 void (*ndo_tx_timeout
) (struct net_device
*dev
);
932 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
933 struct rtnl_link_stats64
*storage
);
934 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
936 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
937 __be16 proto
, u16 vid
);
938 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
939 __be16 proto
, u16 vid
);
940 #ifdef CONFIG_NET_POLL_CONTROLLER
941 void (*ndo_poll_controller
)(struct net_device
*dev
);
942 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
943 struct netpoll_info
*info
,
945 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
947 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
949 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
950 int queue
, u16 vlan
, u8 qos
);
951 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
953 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
954 int vf
, bool setting
);
955 int (*ndo_get_vf_config
)(struct net_device
*dev
,
957 struct ifla_vf_info
*ivf
);
958 int (*ndo_set_vf_port
)(struct net_device
*dev
,
960 struct nlattr
*port
[]);
961 int (*ndo_get_vf_port
)(struct net_device
*dev
,
962 int vf
, struct sk_buff
*skb
);
963 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
964 #if IS_ENABLED(CONFIG_FCOE)
965 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
966 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
967 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
969 struct scatterlist
*sgl
,
971 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
973 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
975 struct scatterlist
*sgl
,
977 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
978 struct netdev_fcoe_hbainfo
*hbainfo
);
981 #if IS_ENABLED(CONFIG_LIBFCOE)
982 #define NETDEV_FCOE_WWNN 0
983 #define NETDEV_FCOE_WWPN 1
984 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
988 #ifdef CONFIG_RFS_ACCEL
989 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
990 const struct sk_buff
*skb
,
994 int (*ndo_add_slave
)(struct net_device
*dev
,
995 struct net_device
*slave_dev
);
996 int (*ndo_del_slave
)(struct net_device
*dev
,
997 struct net_device
*slave_dev
);
998 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
999 netdev_features_t features
);
1000 int (*ndo_set_features
)(struct net_device
*dev
,
1001 netdev_features_t features
);
1002 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1003 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1005 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1006 struct nlattr
*tb
[],
1007 struct net_device
*dev
,
1008 const unsigned char *addr
,
1010 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1011 struct nlattr
*tb
[],
1012 struct net_device
*dev
,
1013 const unsigned char *addr
);
1014 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1015 struct netlink_callback
*cb
,
1016 struct net_device
*dev
,
1019 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1020 struct nlmsghdr
*nlh
);
1021 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1023 struct net_device
*dev
,
1025 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1026 struct nlmsghdr
*nlh
);
1027 int (*ndo_change_carrier
)(struct net_device
*dev
,
1032 * The DEVICE structure.
1033 * Actually, this whole structure is a big mistake. It mixes I/O
1034 * data with strictly "high-level" data, and it has to know about
1035 * almost every data structure used in the INET module.
1037 * FIXME: cleanup struct net_device such that network protocol info
1044 * This is the first field of the "visible" part of this structure
1045 * (i.e. as seen by users in the "Space.c" file). It is the name
1048 char name
[IFNAMSIZ
];
1050 /* device name hash chain, please keep it close to name[] */
1051 struct hlist_node name_hlist
;
1057 * I/O specific fields
1058 * FIXME: Merge these and struct ifmap into one
1060 unsigned long mem_end
; /* shared mem end */
1061 unsigned long mem_start
; /* shared mem start */
1062 unsigned long base_addr
; /* device I/O address */
1063 unsigned int irq
; /* device IRQ number */
1066 * Some hardware also needs these fields, but they are not
1067 * part of the usual set specified in Space.c.
1070 unsigned long state
;
1072 struct list_head dev_list
;
1073 struct list_head napi_list
;
1074 struct list_head unreg_list
;
1075 struct list_head upper_dev_list
; /* List of upper devices */
1078 /* currently active device features */
1079 netdev_features_t features
;
1080 /* user-changeable features */
1081 netdev_features_t hw_features
;
1082 /* user-requested features */
1083 netdev_features_t wanted_features
;
1084 /* mask of features inheritable by VLAN devices */
1085 netdev_features_t vlan_features
;
1086 /* mask of features inherited by encapsulating devices
1087 * This field indicates what encapsulation offloads
1088 * the hardware is capable of doing, and drivers will
1089 * need to set them appropriately.
1091 netdev_features_t hw_enc_features
;
1093 /* Interface index. Unique device identifier */
1097 struct net_device_stats stats
;
1098 atomic_long_t rx_dropped
; /* dropped packets by core network
1099 * Do not use this in drivers.
1102 #ifdef CONFIG_WIRELESS_EXT
1103 /* List of functions to handle Wireless Extensions (instead of ioctl).
1104 * See <net/iw_handler.h> for details. Jean II */
1105 const struct iw_handler_def
* wireless_handlers
;
1106 /* Instance data managed by the core of Wireless Extensions. */
1107 struct iw_public_data
* wireless_data
;
1109 /* Management operations */
1110 const struct net_device_ops
*netdev_ops
;
1111 const struct ethtool_ops
*ethtool_ops
;
1113 /* Hardware header description */
1114 const struct header_ops
*header_ops
;
1116 unsigned int flags
; /* interface flags (a la BSD) */
1117 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1118 * See if.h for definitions. */
1119 unsigned short gflags
;
1120 unsigned short padded
; /* How much padding added by alloc_netdev() */
1122 unsigned char operstate
; /* RFC2863 operstate */
1123 unsigned char link_mode
; /* mapping policy to operstate */
1125 unsigned char if_port
; /* Selectable AUI, TP,..*/
1126 unsigned char dma
; /* DMA channel */
1128 unsigned int mtu
; /* interface MTU value */
1129 unsigned short type
; /* interface hardware type */
1130 unsigned short hard_header_len
; /* hardware hdr length */
1132 /* extra head- and tailroom the hardware may need, but not in all cases
1133 * can this be guaranteed, especially tailroom. Some cases also use
1134 * LL_MAX_HEADER instead to allocate the skb.
1136 unsigned short needed_headroom
;
1137 unsigned short needed_tailroom
;
1139 /* Interface address info. */
1140 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1141 unsigned char addr_assign_type
; /* hw address assignment type */
1142 unsigned char addr_len
; /* hardware address length */
1143 unsigned char neigh_priv_len
;
1144 unsigned short dev_id
; /* for shared network cards */
1146 spinlock_t addr_list_lock
;
1147 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1148 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1149 struct netdev_hw_addr_list dev_addrs
; /* list of device
1153 struct kset
*queues_kset
;
1157 unsigned int promiscuity
;
1158 unsigned int allmulti
;
1161 /* Protocol specific pointers */
1163 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1164 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1166 #if IS_ENABLED(CONFIG_NET_DSA)
1167 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1169 void *atalk_ptr
; /* AppleTalk link */
1170 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1171 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1172 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1173 void *ax25_ptr
; /* AX.25 specific data */
1174 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1175 assign before registering */
1178 * Cache lines mostly used on receive path (including eth_type_trans())
1180 unsigned long last_rx
; /* Time of last Rx
1181 * This should not be set in
1182 * drivers, unless really needed,
1183 * because network stack (bonding)
1184 * use it if/when necessary, to
1185 * avoid dirtying this cache line.
1188 /* Interface address info used in eth_type_trans() */
1189 unsigned char *dev_addr
; /* hw address, (before bcast
1190 because most packets are
1195 struct netdev_rx_queue
*_rx
;
1197 /* Number of RX queues allocated at register_netdev() time */
1198 unsigned int num_rx_queues
;
1200 /* Number of RX queues currently active in device */
1201 unsigned int real_num_rx_queues
;
1205 rx_handler_func_t __rcu
*rx_handler
;
1206 void __rcu
*rx_handler_data
;
1208 struct netdev_queue __rcu
*ingress_queue
;
1209 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1213 * Cache lines mostly used on transmit path
1215 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1217 /* Number of TX queues allocated at alloc_netdev_mq() time */
1218 unsigned int num_tx_queues
;
1220 /* Number of TX queues currently active in device */
1221 unsigned int real_num_tx_queues
;
1223 /* root qdisc from userspace point of view */
1224 struct Qdisc
*qdisc
;
1226 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1227 spinlock_t tx_global_lock
;
1230 struct xps_dev_maps __rcu
*xps_maps
;
1232 #ifdef CONFIG_RFS_ACCEL
1233 /* CPU reverse-mapping for RX completion interrupts, indexed
1234 * by RX queue number. Assigned by driver. This must only be
1235 * set if the ndo_rx_flow_steer operation is defined. */
1236 struct cpu_rmap
*rx_cpu_rmap
;
1239 /* These may be needed for future network-power-down code. */
1242 * trans_start here is expensive for high speed devices on SMP,
1243 * please use netdev_queue->trans_start instead.
1245 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1247 int watchdog_timeo
; /* used by dev_watchdog() */
1248 struct timer_list watchdog_timer
;
1250 /* Number of references to this device */
1251 int __percpu
*pcpu_refcnt
;
1253 /* delayed register/unregister */
1254 struct list_head todo_list
;
1255 /* device index hash chain */
1256 struct hlist_node index_hlist
;
1258 struct list_head link_watch_list
;
1260 /* register/unregister state machine */
1261 enum { NETREG_UNINITIALIZED
=0,
1262 NETREG_REGISTERED
, /* completed register_netdevice */
1263 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1264 NETREG_UNREGISTERED
, /* completed unregister todo */
1265 NETREG_RELEASED
, /* called free_netdev */
1266 NETREG_DUMMY
, /* dummy device for NAPI poll */
1269 bool dismantle
; /* device is going do be freed */
1272 RTNL_LINK_INITIALIZED
,
1273 RTNL_LINK_INITIALIZING
,
1274 } rtnl_link_state
:16;
1276 /* Called from unregister, can be used to call free_netdev */
1277 void (*destructor
)(struct net_device
*dev
);
1279 #ifdef CONFIG_NETPOLL
1280 struct netpoll_info __rcu
*npinfo
;
1283 #ifdef CONFIG_NET_NS
1284 /* Network namespace this network device is inside */
1288 /* mid-layer private */
1291 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1292 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1293 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1294 struct pcpu_vstats __percpu
*vstats
; /* veth stats */
1297 struct garp_port __rcu
*garp_port
;
1299 struct mrp_port __rcu
*mrp_port
;
1301 /* class/net/name entry */
1303 /* space for optional device, statistics, and wireless sysfs groups */
1304 const struct attribute_group
*sysfs_groups
[4];
1306 /* rtnetlink link ops */
1307 const struct rtnl_link_ops
*rtnl_link_ops
;
1309 /* for setting kernel sock attribute on TCP connection setup */
1310 #define GSO_MAX_SIZE 65536
1311 unsigned int gso_max_size
;
1312 #define GSO_MAX_SEGS 65535
1316 /* Data Center Bridging netlink ops */
1317 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1320 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1321 u8 prio_tc_map
[TC_BITMASK
+ 1];
1323 #if IS_ENABLED(CONFIG_FCOE)
1324 /* max exchange id for FCoE LRO by ddp */
1325 unsigned int fcoe_ddp_xid
;
1327 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1328 struct netprio_map __rcu
*priomap
;
1330 /* phy device may attach itself for hardware timestamping */
1331 struct phy_device
*phydev
;
1333 struct lock_class_key
*qdisc_tx_busylock
;
1335 /* group the device belongs to */
1338 struct pm_qos_request pm_qos_req
;
1340 #define to_net_dev(d) container_of(d, struct net_device, dev)
1342 #define NETDEV_ALIGN 32
1345 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1347 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1351 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1353 if (tc
>= dev
->num_tc
)
1356 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1361 void netdev_reset_tc(struct net_device
*dev
)
1364 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1365 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1369 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1371 if (tc
>= dev
->num_tc
)
1374 dev
->tc_to_txq
[tc
].count
= count
;
1375 dev
->tc_to_txq
[tc
].offset
= offset
;
1380 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1382 if (num_tc
> TC_MAX_QUEUE
)
1385 dev
->num_tc
= num_tc
;
1390 int netdev_get_num_tc(struct net_device
*dev
)
1396 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1399 return &dev
->_tx
[index
];
1402 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1403 void (*f
)(struct net_device
*,
1404 struct netdev_queue
*,
1410 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1411 f(dev
, &dev
->_tx
[i
], arg
);
1414 extern struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1415 struct sk_buff
*skb
);
1416 extern u16
__netdev_pick_tx(struct net_device
*dev
, struct sk_buff
*skb
);
1419 * Net namespace inlines
1422 struct net
*dev_net(const struct net_device
*dev
)
1424 return read_pnet(&dev
->nd_net
);
1428 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1430 #ifdef CONFIG_NET_NS
1431 release_net(dev
->nd_net
);
1432 dev
->nd_net
= hold_net(net
);
1436 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1438 #ifdef CONFIG_NET_DSA_TAG_DSA
1439 if (dev
->dsa_ptr
!= NULL
)
1440 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1446 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1448 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1449 if (dev
->dsa_ptr
!= NULL
)
1450 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1457 * netdev_priv - access network device private data
1458 * @dev: network device
1460 * Get network device private data
1462 static inline void *netdev_priv(const struct net_device
*dev
)
1464 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1467 /* Set the sysfs physical device reference for the network logical device
1468 * if set prior to registration will cause a symlink during initialization.
1470 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1472 /* Set the sysfs device type for the network logical device to allow
1473 * fin grained indentification of different network device types. For
1474 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1476 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1478 /* Default NAPI poll() weight
1479 * Device drivers are strongly advised to not use bigger value
1481 #define NAPI_POLL_WEIGHT 64
1484 * netif_napi_add - initialize a napi context
1485 * @dev: network device
1486 * @napi: napi context
1487 * @poll: polling function
1488 * @weight: default weight
1490 * netif_napi_add() must be used to initialize a napi context prior to calling
1491 * *any* of the other napi related functions.
1493 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1494 int (*poll
)(struct napi_struct
*, int), int weight
);
1497 * netif_napi_del - remove a napi context
1498 * @napi: napi context
1500 * netif_napi_del() removes a napi context from the network device napi list
1502 void netif_napi_del(struct napi_struct
*napi
);
1504 struct napi_gro_cb
{
1505 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1508 /* Length of frag0. */
1509 unsigned int frag0_len
;
1511 /* This indicates where we are processing relative to skb->data. */
1514 /* This is non-zero if the packet cannot be merged with the new skb. */
1517 /* Number of segments aggregated. */
1520 /* This is non-zero if the packet may be of the same flow. */
1525 #define NAPI_GRO_FREE 1
1526 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1528 /* jiffies when first packet was created/queued */
1531 /* Used in ipv6_gro_receive() */
1534 /* used in skb_gro_receive() slow path */
1535 struct sk_buff
*last
;
1538 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1540 struct packet_type
{
1541 __be16 type
; /* This is really htons(ether_type). */
1542 struct net_device
*dev
; /* NULL is wildcarded here */
1543 int (*func
) (struct sk_buff
*,
1544 struct net_device
*,
1545 struct packet_type
*,
1546 struct net_device
*);
1547 bool (*id_match
)(struct packet_type
*ptype
,
1549 void *af_packet_priv
;
1550 struct list_head list
;
1553 struct offload_callbacks
{
1554 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1555 netdev_features_t features
);
1556 int (*gso_send_check
)(struct sk_buff
*skb
);
1557 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1558 struct sk_buff
*skb
);
1559 int (*gro_complete
)(struct sk_buff
*skb
);
1562 struct packet_offload
{
1563 __be16 type
; /* This is really htons(ether_type). */
1564 struct offload_callbacks callbacks
;
1565 struct list_head list
;
1568 #include <linux/notifier.h>
1570 /* netdevice notifier chain. Please remember to update the rtnetlink
1571 * notification exclusion list in rtnetlink_event() when adding new
1574 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1575 #define NETDEV_DOWN 0x0002
1576 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1577 detected a hardware crash and restarted
1578 - we can use this eg to kick tcp sessions
1580 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1581 #define NETDEV_REGISTER 0x0005
1582 #define NETDEV_UNREGISTER 0x0006
1583 #define NETDEV_CHANGEMTU 0x0007
1584 #define NETDEV_CHANGEADDR 0x0008
1585 #define NETDEV_GOING_DOWN 0x0009
1586 #define NETDEV_CHANGENAME 0x000A
1587 #define NETDEV_FEAT_CHANGE 0x000B
1588 #define NETDEV_BONDING_FAILOVER 0x000C
1589 #define NETDEV_PRE_UP 0x000D
1590 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1591 #define NETDEV_POST_TYPE_CHANGE 0x000F
1592 #define NETDEV_POST_INIT 0x0010
1593 #define NETDEV_UNREGISTER_FINAL 0x0011
1594 #define NETDEV_RELEASE 0x0012
1595 #define NETDEV_NOTIFY_PEERS 0x0013
1596 #define NETDEV_JOIN 0x0014
1598 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1599 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1600 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1603 extern rwlock_t dev_base_lock
; /* Device list lock */
1605 extern seqcount_t devnet_rename_seq
; /* Device rename seq */
1608 #define for_each_netdev(net, d) \
1609 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1610 #define for_each_netdev_reverse(net, d) \
1611 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1612 #define for_each_netdev_rcu(net, d) \
1613 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1614 #define for_each_netdev_safe(net, d, n) \
1615 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1616 #define for_each_netdev_continue(net, d) \
1617 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1618 #define for_each_netdev_continue_rcu(net, d) \
1619 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1620 #define for_each_netdev_in_bond_rcu(bond, slave) \
1621 for_each_netdev_rcu(&init_net, slave) \
1622 if (netdev_master_upper_dev_get_rcu(slave) == bond)
1623 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1625 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1627 struct list_head
*lh
;
1631 lh
= dev
->dev_list
.next
;
1632 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1635 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1637 struct list_head
*lh
;
1641 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1642 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1645 static inline struct net_device
*first_net_device(struct net
*net
)
1647 return list_empty(&net
->dev_base_head
) ? NULL
:
1648 net_device_entry(net
->dev_base_head
.next
);
1651 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1653 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1655 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1658 extern int netdev_boot_setup_check(struct net_device
*dev
);
1659 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1660 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1661 const char *hwaddr
);
1662 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1663 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1664 extern void dev_add_pack(struct packet_type
*pt
);
1665 extern void dev_remove_pack(struct packet_type
*pt
);
1666 extern void __dev_remove_pack(struct packet_type
*pt
);
1667 extern void dev_add_offload(struct packet_offload
*po
);
1668 extern void dev_remove_offload(struct packet_offload
*po
);
1669 extern void __dev_remove_offload(struct packet_offload
*po
);
1671 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1672 unsigned short mask
);
1673 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1674 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1675 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1676 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1677 extern int dev_open(struct net_device
*dev
);
1678 extern int dev_close(struct net_device
*dev
);
1679 extern void dev_disable_lro(struct net_device
*dev
);
1680 extern int dev_loopback_xmit(struct sk_buff
*newskb
);
1681 extern int dev_queue_xmit(struct sk_buff
*skb
);
1682 extern int register_netdevice(struct net_device
*dev
);
1683 extern void unregister_netdevice_queue(struct net_device
*dev
,
1684 struct list_head
*head
);
1685 extern void unregister_netdevice_many(struct list_head
*head
);
1686 static inline void unregister_netdevice(struct net_device
*dev
)
1688 unregister_netdevice_queue(dev
, NULL
);
1691 extern int netdev_refcnt_read(const struct net_device
*dev
);
1692 extern void free_netdev(struct net_device
*dev
);
1693 extern void synchronize_net(void);
1694 extern int init_dummy_netdev(struct net_device
*dev
);
1696 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1697 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1698 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1699 extern int dev_restart(struct net_device
*dev
);
1700 #ifdef CONFIG_NETPOLL_TRAP
1701 extern int netpoll_trap(void);
1703 extern int skb_gro_receive(struct sk_buff
**head
,
1704 struct sk_buff
*skb
);
1706 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1708 return NAPI_GRO_CB(skb
)->data_offset
;
1711 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1713 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1716 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1718 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1721 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1722 unsigned int offset
)
1724 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1727 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1729 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1732 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1733 unsigned int offset
)
1735 if (!pskb_may_pull(skb
, hlen
))
1738 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1739 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1740 return skb
->data
+ offset
;
1743 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1745 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1748 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1750 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1751 skb_network_offset(skb
);
1754 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1755 unsigned short type
,
1756 const void *daddr
, const void *saddr
,
1759 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1762 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1765 static inline int dev_parse_header(const struct sk_buff
*skb
,
1766 unsigned char *haddr
)
1768 const struct net_device
*dev
= skb
->dev
;
1770 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1772 return dev
->header_ops
->parse(skb
, haddr
);
1775 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1776 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1777 static inline int unregister_gifconf(unsigned int family
)
1779 return register_gifconf(family
, NULL
);
1783 * Incoming packets are placed on per-cpu queues
1785 struct softnet_data
{
1786 struct Qdisc
*output_queue
;
1787 struct Qdisc
**output_queue_tailp
;
1788 struct list_head poll_list
;
1789 struct sk_buff
*completion_queue
;
1790 struct sk_buff_head process_queue
;
1793 unsigned int processed
;
1794 unsigned int time_squeeze
;
1795 unsigned int cpu_collision
;
1796 unsigned int received_rps
;
1799 struct softnet_data
*rps_ipi_list
;
1801 /* Elements below can be accessed between CPUs for RPS */
1802 struct call_single_data csd ____cacheline_aligned_in_smp
;
1803 struct softnet_data
*rps_ipi_next
;
1805 unsigned int input_queue_head
;
1806 unsigned int input_queue_tail
;
1808 unsigned int dropped
;
1809 struct sk_buff_head input_pkt_queue
;
1810 struct napi_struct backlog
;
1813 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1816 sd
->input_queue_head
++;
1820 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1821 unsigned int *qtail
)
1824 *qtail
= ++sd
->input_queue_tail
;
1828 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1830 extern void __netif_schedule(struct Qdisc
*q
);
1832 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1834 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1835 __netif_schedule(txq
->qdisc
);
1838 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1842 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1843 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1846 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1848 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1852 * netif_start_queue - allow transmit
1853 * @dev: network device
1855 * Allow upper layers to call the device hard_start_xmit routine.
1857 static inline void netif_start_queue(struct net_device
*dev
)
1859 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1862 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1866 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1867 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1868 netif_tx_start_queue(txq
);
1872 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1874 #ifdef CONFIG_NETPOLL_TRAP
1875 if (netpoll_trap()) {
1876 netif_tx_start_queue(dev_queue
);
1880 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1881 __netif_schedule(dev_queue
->qdisc
);
1885 * netif_wake_queue - restart transmit
1886 * @dev: network device
1888 * Allow upper layers to call the device hard_start_xmit routine.
1889 * Used for flow control when transmit resources are available.
1891 static inline void netif_wake_queue(struct net_device
*dev
)
1893 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1896 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1900 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1901 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1902 netif_tx_wake_queue(txq
);
1906 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1908 if (WARN_ON(!dev_queue
)) {
1909 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1912 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1916 * netif_stop_queue - stop transmitted packets
1917 * @dev: network device
1919 * Stop upper layers calling the device hard_start_xmit routine.
1920 * Used for flow control when transmit resources are unavailable.
1922 static inline void netif_stop_queue(struct net_device
*dev
)
1924 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1927 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1931 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1932 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1933 netif_tx_stop_queue(txq
);
1937 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1939 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1943 * netif_queue_stopped - test if transmit queue is flowblocked
1944 * @dev: network device
1946 * Test if transmit queue on device is currently unable to send.
1948 static inline bool netif_queue_stopped(const struct net_device
*dev
)
1950 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1953 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
1955 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
1958 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
1960 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
1963 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
1967 dql_queued(&dev_queue
->dql
, bytes
);
1969 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
1972 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1975 * The XOFF flag must be set before checking the dql_avail below,
1976 * because in netdev_tx_completed_queue we update the dql_completed
1977 * before checking the XOFF flag.
1981 /* check again in case another CPU has just made room avail */
1982 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
1983 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
1987 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
1989 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
1992 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
1993 unsigned int pkts
, unsigned int bytes
)
1996 if (unlikely(!bytes
))
1999 dql_completed(&dev_queue
->dql
, bytes
);
2002 * Without the memory barrier there is a small possiblity that
2003 * netdev_tx_sent_queue will miss the update and cause the queue to
2004 * be stopped forever
2008 if (dql_avail(&dev_queue
->dql
) < 0)
2011 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2012 netif_schedule_queue(dev_queue
);
2016 static inline void netdev_completed_queue(struct net_device
*dev
,
2017 unsigned int pkts
, unsigned int bytes
)
2019 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2022 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2025 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2030 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2032 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2036 * netif_running - test if up
2037 * @dev: network device
2039 * Test if the device has been brought up.
2041 static inline bool netif_running(const struct net_device
*dev
)
2043 return test_bit(__LINK_STATE_START
, &dev
->state
);
2047 * Routines to manage the subqueues on a device. We only need start
2048 * stop, and a check if it's stopped. All other device management is
2049 * done at the overall netdevice level.
2050 * Also test the device if we're multiqueue.
2054 * netif_start_subqueue - allow sending packets on subqueue
2055 * @dev: network device
2056 * @queue_index: sub queue index
2058 * Start individual transmit queue of a device with multiple transmit queues.
2060 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2062 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2064 netif_tx_start_queue(txq
);
2068 * netif_stop_subqueue - stop sending packets on subqueue
2069 * @dev: network device
2070 * @queue_index: sub queue index
2072 * Stop individual transmit queue of a device with multiple transmit queues.
2074 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2076 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2077 #ifdef CONFIG_NETPOLL_TRAP
2081 netif_tx_stop_queue(txq
);
2085 * netif_subqueue_stopped - test status of subqueue
2086 * @dev: network device
2087 * @queue_index: sub queue index
2089 * Check individual transmit queue of a device with multiple transmit queues.
2091 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2094 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2096 return netif_tx_queue_stopped(txq
);
2099 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2100 struct sk_buff
*skb
)
2102 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2106 * netif_wake_subqueue - allow sending packets on subqueue
2107 * @dev: network device
2108 * @queue_index: sub queue index
2110 * Resume individual transmit queue of a device with multiple transmit queues.
2112 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2114 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2115 #ifdef CONFIG_NETPOLL_TRAP
2119 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2120 __netif_schedule(txq
->qdisc
);
2124 extern int netif_set_xps_queue(struct net_device
*dev
, struct cpumask
*mask
,
2127 static inline int netif_set_xps_queue(struct net_device
*dev
,
2128 struct cpumask
*mask
,
2136 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2137 * as a distribution range limit for the returned value.
2139 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2140 const struct sk_buff
*skb
)
2142 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2146 * netif_is_multiqueue - test if device has multiple transmit queues
2147 * @dev: network device
2149 * Check if device has multiple transmit queues
2151 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2153 return dev
->num_tx_queues
> 1;
2156 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
2160 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
2163 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2170 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2171 const struct net_device
*from_dev
)
2175 err
= netif_set_real_num_tx_queues(to_dev
,
2176 from_dev
->real_num_tx_queues
);
2180 return netif_set_real_num_rx_queues(to_dev
,
2181 from_dev
->real_num_rx_queues
);
2187 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2188 extern int netif_get_num_default_rss_queues(void);
2190 /* Use this variant when it is known for sure that it
2191 * is executing from hardware interrupt context or with hardware interrupts
2194 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2196 /* Use this variant in places where it could be invoked
2197 * from either hardware interrupt or other context, with hardware interrupts
2198 * either disabled or enabled.
2200 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2202 extern int netif_rx(struct sk_buff
*skb
);
2203 extern int netif_rx_ni(struct sk_buff
*skb
);
2204 extern int netif_receive_skb(struct sk_buff
*skb
);
2205 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2206 struct sk_buff
*skb
);
2207 extern void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2208 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2209 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2211 static inline void napi_free_frags(struct napi_struct
*napi
)
2213 kfree_skb(napi
->skb
);
2217 extern int netdev_rx_handler_register(struct net_device
*dev
,
2218 rx_handler_func_t
*rx_handler
,
2219 void *rx_handler_data
);
2220 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2222 extern bool dev_valid_name(const char *name
);
2223 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2224 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2225 extern unsigned int dev_get_flags(const struct net_device
*);
2226 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2227 extern int dev_change_flags(struct net_device
*, unsigned int);
2228 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2229 extern int dev_change_name(struct net_device
*, const char *);
2230 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2231 extern int dev_change_net_namespace(struct net_device
*,
2232 struct net
*, const char *);
2233 extern int dev_set_mtu(struct net_device
*, int);
2234 extern void dev_set_group(struct net_device
*, int);
2235 extern int dev_set_mac_address(struct net_device
*,
2237 extern int dev_change_carrier(struct net_device
*,
2239 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2240 struct net_device
*dev
,
2241 struct netdev_queue
*txq
);
2242 extern int dev_forward_skb(struct net_device
*dev
,
2243 struct sk_buff
*skb
);
2245 extern int netdev_budget
;
2247 /* Called by rtnetlink.c:rtnl_unlock() */
2248 extern void netdev_run_todo(void);
2251 * dev_put - release reference to device
2252 * @dev: network device
2254 * Release reference to device to allow it to be freed.
2256 static inline void dev_put(struct net_device
*dev
)
2258 this_cpu_dec(*dev
->pcpu_refcnt
);
2262 * dev_hold - get reference to device
2263 * @dev: network device
2265 * Hold reference to device to keep it from being freed.
2267 static inline void dev_hold(struct net_device
*dev
)
2269 this_cpu_inc(*dev
->pcpu_refcnt
);
2272 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2273 * and _off may be called from IRQ context, but it is caller
2274 * who is responsible for serialization of these calls.
2276 * The name carrier is inappropriate, these functions should really be
2277 * called netif_lowerlayer_*() because they represent the state of any
2278 * kind of lower layer not just hardware media.
2281 extern void linkwatch_init_dev(struct net_device
*dev
);
2282 extern void linkwatch_fire_event(struct net_device
*dev
);
2283 extern void linkwatch_forget_dev(struct net_device
*dev
);
2286 * netif_carrier_ok - test if carrier present
2287 * @dev: network device
2289 * Check if carrier is present on device
2291 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2293 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2296 extern unsigned long dev_trans_start(struct net_device
*dev
);
2298 extern void __netdev_watchdog_up(struct net_device
*dev
);
2300 extern void netif_carrier_on(struct net_device
*dev
);
2302 extern void netif_carrier_off(struct net_device
*dev
);
2305 * netif_dormant_on - mark device as dormant.
2306 * @dev: network device
2308 * Mark device as dormant (as per RFC2863).
2310 * The dormant state indicates that the relevant interface is not
2311 * actually in a condition to pass packets (i.e., it is not 'up') but is
2312 * in a "pending" state, waiting for some external event. For "on-
2313 * demand" interfaces, this new state identifies the situation where the
2314 * interface is waiting for events to place it in the up state.
2317 static inline void netif_dormant_on(struct net_device
*dev
)
2319 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2320 linkwatch_fire_event(dev
);
2324 * netif_dormant_off - set device as not dormant.
2325 * @dev: network device
2327 * Device is not in dormant state.
2329 static inline void netif_dormant_off(struct net_device
*dev
)
2331 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2332 linkwatch_fire_event(dev
);
2336 * netif_dormant - test if carrier present
2337 * @dev: network device
2339 * Check if carrier is present on device
2341 static inline bool netif_dormant(const struct net_device
*dev
)
2343 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2348 * netif_oper_up - test if device is operational
2349 * @dev: network device
2351 * Check if carrier is operational
2353 static inline bool netif_oper_up(const struct net_device
*dev
)
2355 return (dev
->operstate
== IF_OPER_UP
||
2356 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2360 * netif_device_present - is device available or removed
2361 * @dev: network device
2363 * Check if device has not been removed from system.
2365 static inline bool netif_device_present(struct net_device
*dev
)
2367 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2370 extern void netif_device_detach(struct net_device
*dev
);
2372 extern void netif_device_attach(struct net_device
*dev
);
2375 * Network interface message level settings
2379 NETIF_MSG_DRV
= 0x0001,
2380 NETIF_MSG_PROBE
= 0x0002,
2381 NETIF_MSG_LINK
= 0x0004,
2382 NETIF_MSG_TIMER
= 0x0008,
2383 NETIF_MSG_IFDOWN
= 0x0010,
2384 NETIF_MSG_IFUP
= 0x0020,
2385 NETIF_MSG_RX_ERR
= 0x0040,
2386 NETIF_MSG_TX_ERR
= 0x0080,
2387 NETIF_MSG_TX_QUEUED
= 0x0100,
2388 NETIF_MSG_INTR
= 0x0200,
2389 NETIF_MSG_TX_DONE
= 0x0400,
2390 NETIF_MSG_RX_STATUS
= 0x0800,
2391 NETIF_MSG_PKTDATA
= 0x1000,
2392 NETIF_MSG_HW
= 0x2000,
2393 NETIF_MSG_WOL
= 0x4000,
2396 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2397 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2398 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2399 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2400 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2401 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2402 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2403 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2404 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2405 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2406 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2407 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2408 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2409 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2410 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2412 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2415 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2416 return default_msg_enable_bits
;
2417 if (debug_value
== 0) /* no output */
2419 /* set low N bits */
2420 return (1 << debug_value
) - 1;
2423 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2425 spin_lock(&txq
->_xmit_lock
);
2426 txq
->xmit_lock_owner
= cpu
;
2429 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2431 spin_lock_bh(&txq
->_xmit_lock
);
2432 txq
->xmit_lock_owner
= smp_processor_id();
2435 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2437 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2439 txq
->xmit_lock_owner
= smp_processor_id();
2443 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2445 txq
->xmit_lock_owner
= -1;
2446 spin_unlock(&txq
->_xmit_lock
);
2449 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2451 txq
->xmit_lock_owner
= -1;
2452 spin_unlock_bh(&txq
->_xmit_lock
);
2455 static inline void txq_trans_update(struct netdev_queue
*txq
)
2457 if (txq
->xmit_lock_owner
!= -1)
2458 txq
->trans_start
= jiffies
;
2462 * netif_tx_lock - grab network device transmit lock
2463 * @dev: network device
2465 * Get network device transmit lock
2467 static inline void netif_tx_lock(struct net_device
*dev
)
2472 spin_lock(&dev
->tx_global_lock
);
2473 cpu
= smp_processor_id();
2474 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2475 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2477 /* We are the only thread of execution doing a
2478 * freeze, but we have to grab the _xmit_lock in
2479 * order to synchronize with threads which are in
2480 * the ->hard_start_xmit() handler and already
2481 * checked the frozen bit.
2483 __netif_tx_lock(txq
, cpu
);
2484 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2485 __netif_tx_unlock(txq
);
2489 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2495 static inline void netif_tx_unlock(struct net_device
*dev
)
2499 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2500 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2502 /* No need to grab the _xmit_lock here. If the
2503 * queue is not stopped for another reason, we
2506 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2507 netif_schedule_queue(txq
);
2509 spin_unlock(&dev
->tx_global_lock
);
2512 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2514 netif_tx_unlock(dev
);
2518 #define HARD_TX_LOCK(dev, txq, cpu) { \
2519 if ((dev->features & NETIF_F_LLTX) == 0) { \
2520 __netif_tx_lock(txq, cpu); \
2524 #define HARD_TX_UNLOCK(dev, txq) { \
2525 if ((dev->features & NETIF_F_LLTX) == 0) { \
2526 __netif_tx_unlock(txq); \
2530 static inline void netif_tx_disable(struct net_device
*dev
)
2536 cpu
= smp_processor_id();
2537 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2538 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2540 __netif_tx_lock(txq
, cpu
);
2541 netif_tx_stop_queue(txq
);
2542 __netif_tx_unlock(txq
);
2547 static inline void netif_addr_lock(struct net_device
*dev
)
2549 spin_lock(&dev
->addr_list_lock
);
2552 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2554 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2557 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2559 spin_lock_bh(&dev
->addr_list_lock
);
2562 static inline void netif_addr_unlock(struct net_device
*dev
)
2564 spin_unlock(&dev
->addr_list_lock
);
2567 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2569 spin_unlock_bh(&dev
->addr_list_lock
);
2573 * dev_addrs walker. Should be used only for read access. Call with
2574 * rcu_read_lock held.
2576 #define for_each_dev_addr(dev, ha) \
2577 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2579 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2581 extern void ether_setup(struct net_device
*dev
);
2583 /* Support for loadable net-drivers */
2584 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2585 void (*setup
)(struct net_device
*),
2586 unsigned int txqs
, unsigned int rxqs
);
2587 #define alloc_netdev(sizeof_priv, name, setup) \
2588 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2590 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2591 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2593 extern int register_netdev(struct net_device
*dev
);
2594 extern void unregister_netdev(struct net_device
*dev
);
2596 /* General hardware address lists handling functions */
2597 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2598 struct netdev_hw_addr_list
*from_list
,
2599 int addr_len
, unsigned char addr_type
);
2600 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2601 struct netdev_hw_addr_list
*from_list
,
2602 int addr_len
, unsigned char addr_type
);
2603 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2604 struct netdev_hw_addr_list
*from_list
,
2606 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2607 struct netdev_hw_addr_list
*from_list
,
2609 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2610 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2612 /* Functions used for device addresses handling */
2613 extern int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
2614 unsigned char addr_type
);
2615 extern int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
2616 unsigned char addr_type
);
2617 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2618 struct net_device
*from_dev
,
2619 unsigned char addr_type
);
2620 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2621 struct net_device
*from_dev
,
2622 unsigned char addr_type
);
2623 extern void dev_addr_flush(struct net_device
*dev
);
2624 extern int dev_addr_init(struct net_device
*dev
);
2626 /* Functions used for unicast addresses handling */
2627 extern int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
2628 extern int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2629 extern int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
2630 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2631 extern int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
2632 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2633 extern void dev_uc_flush(struct net_device
*dev
);
2634 extern void dev_uc_init(struct net_device
*dev
);
2636 /* Functions used for multicast addresses handling */
2637 extern int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
2638 extern int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
2639 extern int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2640 extern int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
2641 extern int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
2642 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2643 extern int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
2644 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2645 extern void dev_mc_flush(struct net_device
*dev
);
2646 extern void dev_mc_init(struct net_device
*dev
);
2648 /* Functions used for secondary unicast and multicast support */
2649 extern void dev_set_rx_mode(struct net_device
*dev
);
2650 extern void __dev_set_rx_mode(struct net_device
*dev
);
2651 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2652 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2653 extern void netdev_state_change(struct net_device
*dev
);
2654 extern void netdev_notify_peers(struct net_device
*dev
);
2655 extern void netdev_features_change(struct net_device
*dev
);
2656 /* Load a device via the kmod */
2657 extern void dev_load(struct net
*net
, const char *name
);
2658 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2659 struct rtnl_link_stats64
*storage
);
2660 extern void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
2661 const struct net_device_stats
*netdev_stats
);
2663 extern int netdev_max_backlog
;
2664 extern int netdev_tstamp_prequeue
;
2665 extern int weight_p
;
2666 extern int bpf_jit_enable
;
2668 extern bool netdev_has_upper_dev(struct net_device
*dev
,
2669 struct net_device
*upper_dev
);
2670 extern bool netdev_has_any_upper_dev(struct net_device
*dev
);
2671 extern struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
2672 extern struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
2673 extern int netdev_upper_dev_link(struct net_device
*dev
,
2674 struct net_device
*upper_dev
);
2675 extern int netdev_master_upper_dev_link(struct net_device
*dev
,
2676 struct net_device
*upper_dev
);
2677 extern void netdev_upper_dev_unlink(struct net_device
*dev
,
2678 struct net_device
*upper_dev
);
2679 extern int skb_checksum_help(struct sk_buff
*skb
);
2680 extern struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
2681 netdev_features_t features
, bool tx_path
);
2682 extern struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
2683 netdev_features_t features
);
2686 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
2688 return __skb_gso_segment(skb
, features
, true);
2690 __be16
skb_network_protocol(struct sk_buff
*skb
);
2692 static inline bool can_checksum_protocol(netdev_features_t features
,
2695 return ((features
& NETIF_F_GEN_CSUM
) ||
2696 ((features
& NETIF_F_V4_CSUM
) &&
2697 protocol
== htons(ETH_P_IP
)) ||
2698 ((features
& NETIF_F_V6_CSUM
) &&
2699 protocol
== htons(ETH_P_IPV6
)) ||
2700 ((features
& NETIF_F_FCOE_CRC
) &&
2701 protocol
== htons(ETH_P_FCOE
)));
2705 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2707 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2711 /* rx skb timestamps */
2712 extern void net_enable_timestamp(void);
2713 extern void net_disable_timestamp(void);
2715 #ifdef CONFIG_PROC_FS
2716 extern int __init
dev_proc_init(void);
2718 #define dev_proc_init() 0
2721 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2722 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2724 extern struct kobj_ns_type_operations net_ns_type_operations
;
2726 extern const char *netdev_drivername(const struct net_device
*dev
);
2728 extern void linkwatch_run_queue(void);
2730 static inline netdev_features_t
netdev_get_wanted_features(
2731 struct net_device
*dev
)
2733 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2735 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2736 netdev_features_t one
, netdev_features_t mask
);
2737 int __netdev_update_features(struct net_device
*dev
);
2738 void netdev_update_features(struct net_device
*dev
);
2739 void netdev_change_features(struct net_device
*dev
);
2741 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2742 struct net_device
*dev
);
2744 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2746 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
2748 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2750 /* check flags correspondence */
2751 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2752 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2753 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2754 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2755 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2756 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2758 return (features
& feature
) == feature
;
2761 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2763 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2764 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2767 static inline bool netif_needs_gso(struct sk_buff
*skb
,
2768 netdev_features_t features
)
2770 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2771 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
2772 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
2775 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2778 dev
->gso_max_size
= size
;
2781 static inline bool netif_is_bond_master(struct net_device
*dev
)
2783 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
2786 static inline bool netif_is_bond_slave(struct net_device
*dev
)
2788 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2791 static inline bool netif_supports_nofcs(struct net_device
*dev
)
2793 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
2796 extern struct pernet_operations __net_initdata loopback_net_ops
;
2798 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2800 /* netdev_printk helpers, similar to dev_printk */
2802 static inline const char *netdev_name(const struct net_device
*dev
)
2804 if (dev
->reg_state
!= NETREG_REGISTERED
)
2805 return "(unregistered net_device)";
2809 extern __printf(3, 4)
2810 int netdev_printk(const char *level
, const struct net_device
*dev
,
2811 const char *format
, ...);
2812 extern __printf(2, 3)
2813 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2814 extern __printf(2, 3)
2815 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2816 extern __printf(2, 3)
2817 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2818 extern __printf(2, 3)
2819 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2820 extern __printf(2, 3)
2821 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2822 extern __printf(2, 3)
2823 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2824 extern __printf(2, 3)
2825 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2827 #define MODULE_ALIAS_NETDEV(device) \
2828 MODULE_ALIAS("netdev-" device)
2830 #if defined(CONFIG_DYNAMIC_DEBUG)
2831 #define netdev_dbg(__dev, format, args...) \
2833 dynamic_netdev_dbg(__dev, format, ##args); \
2835 #elif defined(DEBUG)
2836 #define netdev_dbg(__dev, format, args...) \
2837 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2839 #define netdev_dbg(__dev, format, args...) \
2842 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2847 #if defined(VERBOSE_DEBUG)
2848 #define netdev_vdbg netdev_dbg
2851 #define netdev_vdbg(dev, format, args...) \
2854 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2860 * netdev_WARN() acts like dev_printk(), but with the key difference
2861 * of using a WARN/WARN_ON to get the message out, including the
2862 * file/line information and a backtrace.
2864 #define netdev_WARN(dev, format, args...) \
2865 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2867 /* netif printk helpers, similar to netdev_printk */
2869 #define netif_printk(priv, type, level, dev, fmt, args...) \
2871 if (netif_msg_##type(priv)) \
2872 netdev_printk(level, (dev), fmt, ##args); \
2875 #define netif_level(level, priv, type, dev, fmt, args...) \
2877 if (netif_msg_##type(priv)) \
2878 netdev_##level(dev, fmt, ##args); \
2881 #define netif_emerg(priv, type, dev, fmt, args...) \
2882 netif_level(emerg, priv, type, dev, fmt, ##args)
2883 #define netif_alert(priv, type, dev, fmt, args...) \
2884 netif_level(alert, priv, type, dev, fmt, ##args)
2885 #define netif_crit(priv, type, dev, fmt, args...) \
2886 netif_level(crit, priv, type, dev, fmt, ##args)
2887 #define netif_err(priv, type, dev, fmt, args...) \
2888 netif_level(err, priv, type, dev, fmt, ##args)
2889 #define netif_warn(priv, type, dev, fmt, args...) \
2890 netif_level(warn, priv, type, dev, fmt, ##args)
2891 #define netif_notice(priv, type, dev, fmt, args...) \
2892 netif_level(notice, priv, type, dev, fmt, ##args)
2893 #define netif_info(priv, type, dev, fmt, args...) \
2894 netif_level(info, priv, type, dev, fmt, ##args)
2896 #if defined(CONFIG_DYNAMIC_DEBUG)
2897 #define netif_dbg(priv, type, netdev, format, args...) \
2899 if (netif_msg_##type(priv)) \
2900 dynamic_netdev_dbg(netdev, format, ##args); \
2902 #elif defined(DEBUG)
2903 #define netif_dbg(priv, type, dev, format, args...) \
2904 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2906 #define netif_dbg(priv, type, dev, format, args...) \
2909 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2914 #if defined(VERBOSE_DEBUG)
2915 #define netif_vdbg netif_dbg
2917 #define netif_vdbg(priv, type, dev, format, args...) \
2920 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2926 * The list of packet types we will receive (as opposed to discard)
2927 * and the routines to invoke.
2929 * Why 16. Because with 16 the only overlap we get on a hash of the
2930 * low nibble of the protocol value is RARP/SNAP/X.25.
2932 * NOTE: That is no longer true with the addition of VLAN tags. Not
2933 * sure which should go first, but I bet it won't make much
2934 * difference if we are running VLANs. The good news is that
2935 * this protocol won't be in the list unless compiled in, so
2936 * the average user (w/out VLANs) will not be adversely affected.
2952 #define PTYPE_HASH_SIZE (16)
2953 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
2955 #endif /* _LINUX_NETDEVICE_H */