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 rps_dev_flow flows
[0];
598 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
599 ((_num) * sizeof(struct rps_dev_flow)))
602 * The rps_sock_flow_table contains mappings of flows to the last CPU
603 * on which they were processed by the application (set in recvmsg).
605 struct rps_sock_flow_table
{
609 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
610 ((_num) * sizeof(u16)))
612 #define RPS_NO_CPU 0xffff
614 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
618 unsigned int cpu
, index
= hash
& table
->mask
;
620 /* We only give a hint, preemption can change cpu under us */
621 cpu
= raw_smp_processor_id();
623 if (table
->ents
[index
] != cpu
)
624 table
->ents
[index
] = cpu
;
628 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
632 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
635 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
637 #ifdef CONFIG_RFS_ACCEL
638 extern bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
,
639 u32 flow_id
, u16 filter_id
);
642 /* This structure contains an instance of an RX queue. */
643 struct netdev_rx_queue
{
644 struct rps_map __rcu
*rps_map
;
645 struct rps_dev_flow_table __rcu
*rps_flow_table
;
647 struct net_device
*dev
;
648 } ____cacheline_aligned_in_smp
;
649 #endif /* CONFIG_RPS */
653 * This structure holds an XPS map which can be of variable length. The
654 * map is an array of queues.
658 unsigned int alloc_len
;
662 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
663 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
667 * This structure holds all XPS maps for device. Maps are indexed by CPU.
669 struct xps_dev_maps
{
671 struct xps_map __rcu
*cpu_map
[0];
673 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
674 (nr_cpu_ids * sizeof(struct xps_map *)))
675 #endif /* CONFIG_XPS */
677 #define TC_MAX_QUEUE 16
678 #define TC_BITMASK 15
679 /* HW offloaded queuing disciplines txq count and offset maps */
680 struct netdev_tc_txq
{
685 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
687 * This structure is to hold information about the device
688 * configured to run FCoE protocol stack.
690 struct netdev_fcoe_hbainfo
{
691 char manufacturer
[64];
692 char serial_number
[64];
693 char hardware_version
[64];
694 char driver_version
[64];
695 char optionrom_version
[64];
696 char firmware_version
[64];
698 char model_description
[256];
703 * This structure defines the management hooks for network devices.
704 * The following hooks can be defined; unless noted otherwise, they are
705 * optional and can be filled with a null pointer.
707 * int (*ndo_init)(struct net_device *dev);
708 * This function is called once when network device is registered.
709 * The network device can use this to any late stage initializaton
710 * or semantic validattion. It can fail with an error code which will
711 * be propogated back to register_netdev
713 * void (*ndo_uninit)(struct net_device *dev);
714 * This function is called when device is unregistered or when registration
715 * fails. It is not called if init fails.
717 * int (*ndo_open)(struct net_device *dev);
718 * This function is called when network device transistions to the up
721 * int (*ndo_stop)(struct net_device *dev);
722 * This function is called when network device transistions to the down
725 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
726 * struct net_device *dev);
727 * Called when a packet needs to be transmitted.
728 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
729 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
730 * Required can not be NULL.
732 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
733 * Called to decide which queue to when device supports multiple
736 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
737 * This function is called to allow device receiver to make
738 * changes to configuration when multicast or promiscious is enabled.
740 * void (*ndo_set_rx_mode)(struct net_device *dev);
741 * This function is called device changes address list filtering.
742 * If driver handles unicast address filtering, it should set
743 * IFF_UNICAST_FLT to its priv_flags.
745 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
746 * This function is called when the Media Access Control address
747 * needs to be changed. If this interface is not defined, the
748 * mac address can not be changed.
750 * int (*ndo_validate_addr)(struct net_device *dev);
751 * Test if Media Access Control address is valid for the device.
753 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
754 * Called when a user request an ioctl which can't be handled by
755 * the generic interface code. If not defined ioctl's return
756 * not supported error code.
758 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
759 * Used to set network devices bus interface parameters. This interface
760 * is retained for legacy reason, new devices should use the bus
761 * interface (PCI) for low level management.
763 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
764 * Called when a user wants to change the Maximum Transfer Unit
765 * of a device. If not defined, any request to change MTU will
766 * will return an error.
768 * void (*ndo_tx_timeout)(struct net_device *dev);
769 * Callback uses when the transmitter has not made any progress
770 * for dev->watchdog ticks.
772 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
773 * struct rtnl_link_stats64 *storage);
774 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
775 * Called when a user wants to get the network device usage
776 * statistics. Drivers must do one of the following:
777 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
778 * rtnl_link_stats64 structure passed by the caller.
779 * 2. Define @ndo_get_stats to update a net_device_stats structure
780 * (which should normally be dev->stats) and return a pointer to
781 * it. The structure may be changed asynchronously only if each
782 * field is written atomically.
783 * 3. Update dev->stats asynchronously and atomically, and define
786 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
787 * If device support VLAN filtering this function is called when a
788 * VLAN id is registered.
790 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
791 * If device support VLAN filtering this function is called when a
792 * VLAN id is unregistered.
794 * void (*ndo_poll_controller)(struct net_device *dev);
796 * SR-IOV management functions.
797 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
798 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
799 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
800 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
801 * int (*ndo_get_vf_config)(struct net_device *dev,
802 * int vf, struct ifla_vf_info *ivf);
803 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
804 * struct nlattr *port[]);
805 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
806 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
807 * Called to setup 'tc' number of traffic classes in the net device. This
808 * is always called from the stack with the rtnl lock held and netif tx
809 * queues stopped. This allows the netdevice to perform queue management
812 * Fiber Channel over Ethernet (FCoE) offload functions.
813 * int (*ndo_fcoe_enable)(struct net_device *dev);
814 * Called when the FCoE protocol stack wants to start using LLD for FCoE
815 * so the underlying device can perform whatever needed configuration or
816 * initialization to support acceleration of FCoE traffic.
818 * int (*ndo_fcoe_disable)(struct net_device *dev);
819 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
820 * so the underlying device can perform whatever needed clean-ups to
821 * stop supporting acceleration of FCoE traffic.
823 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
824 * struct scatterlist *sgl, unsigned int sgc);
825 * Called when the FCoE Initiator wants to initialize an I/O that
826 * is a possible candidate for Direct Data Placement (DDP). The LLD can
827 * perform necessary setup and returns 1 to indicate the device is set up
828 * successfully to perform DDP on this I/O, otherwise this returns 0.
830 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
831 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
832 * indicated by the FC exchange id 'xid', so the underlying device can
833 * clean up and reuse resources for later DDP requests.
835 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
836 * struct scatterlist *sgl, unsigned int sgc);
837 * Called when the FCoE Target wants to initialize an I/O that
838 * is a possible candidate for Direct Data Placement (DDP). The LLD can
839 * perform necessary setup and returns 1 to indicate the device is set up
840 * successfully to perform DDP on this I/O, otherwise this returns 0.
842 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
843 * struct netdev_fcoe_hbainfo *hbainfo);
844 * Called when the FCoE Protocol stack wants information on the underlying
845 * device. This information is utilized by the FCoE protocol stack to
846 * register attributes with Fiber Channel management service as per the
847 * FC-GS Fabric Device Management Information(FDMI) specification.
849 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
850 * Called when the underlying device wants to override default World Wide
851 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
852 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
853 * protocol stack to use.
856 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
857 * u16 rxq_index, u32 flow_id);
858 * Set hardware filter for RFS. rxq_index is the target queue index;
859 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
860 * Return the filter ID on success, or a negative error code.
862 * Slave management functions (for bridge, bonding, etc).
863 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
864 * Called to make another netdev an underling.
866 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
867 * Called to release previously enslaved netdev.
869 * Feature/offload setting functions.
870 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
871 * netdev_features_t features);
872 * Adjusts the requested feature flags according to device-specific
873 * constraints, and returns the resulting flags. Must not modify
876 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
877 * Called to update device configuration to new features. Passed
878 * feature set might be less than what was returned by ndo_fix_features()).
879 * Must return >0 or -errno if it changed dev->features itself.
881 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
882 * struct net_device *dev,
883 * const unsigned char *addr, u16 flags)
884 * Adds an FDB entry to dev for addr.
885 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
886 * struct net_device *dev,
887 * const unsigned char *addr)
888 * Deletes the FDB entry from dev coresponding to addr.
889 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
890 * struct net_device *dev, int idx)
891 * Used to add FDB entries to dump requests. Implementers should add
892 * entries to skb and update idx with the number of entries.
894 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
895 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
896 * struct net_device *dev, u32 filter_mask)
898 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
899 * Called to change device carrier. Soft-devices (like dummy, team, etc)
900 * which do not represent real hardware may define this to allow their
901 * userspace components to manage their virtual carrier state. Devices
902 * that determine carrier state from physical hardware properties (eg
903 * network cables) or protocol-dependent mechanisms (eg
904 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
906 struct net_device_ops
{
907 int (*ndo_init
)(struct net_device
*dev
);
908 void (*ndo_uninit
)(struct net_device
*dev
);
909 int (*ndo_open
)(struct net_device
*dev
);
910 int (*ndo_stop
)(struct net_device
*dev
);
911 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
912 struct net_device
*dev
);
913 u16 (*ndo_select_queue
)(struct net_device
*dev
,
914 struct sk_buff
*skb
);
915 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
917 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
918 int (*ndo_set_mac_address
)(struct net_device
*dev
,
920 int (*ndo_validate_addr
)(struct net_device
*dev
);
921 int (*ndo_do_ioctl
)(struct net_device
*dev
,
922 struct ifreq
*ifr
, int cmd
);
923 int (*ndo_set_config
)(struct net_device
*dev
,
925 int (*ndo_change_mtu
)(struct net_device
*dev
,
927 int (*ndo_neigh_setup
)(struct net_device
*dev
,
928 struct neigh_parms
*);
929 void (*ndo_tx_timeout
) (struct net_device
*dev
);
931 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
932 struct rtnl_link_stats64
*storage
);
933 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
935 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
936 __be16 proto
, u16 vid
);
937 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
938 __be16 proto
, u16 vid
);
939 #ifdef CONFIG_NET_POLL_CONTROLLER
940 void (*ndo_poll_controller
)(struct net_device
*dev
);
941 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
942 struct netpoll_info
*info
,
944 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
946 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
948 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
949 int queue
, u16 vlan
, u8 qos
);
950 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
952 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
953 int vf
, bool setting
);
954 int (*ndo_get_vf_config
)(struct net_device
*dev
,
956 struct ifla_vf_info
*ivf
);
957 int (*ndo_set_vf_port
)(struct net_device
*dev
,
959 struct nlattr
*port
[]);
960 int (*ndo_get_vf_port
)(struct net_device
*dev
,
961 int vf
, struct sk_buff
*skb
);
962 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
963 #if IS_ENABLED(CONFIG_FCOE)
964 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
965 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
966 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
968 struct scatterlist
*sgl
,
970 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
972 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
974 struct scatterlist
*sgl
,
976 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
977 struct netdev_fcoe_hbainfo
*hbainfo
);
980 #if IS_ENABLED(CONFIG_LIBFCOE)
981 #define NETDEV_FCOE_WWNN 0
982 #define NETDEV_FCOE_WWPN 1
983 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
987 #ifdef CONFIG_RFS_ACCEL
988 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
989 const struct sk_buff
*skb
,
993 int (*ndo_add_slave
)(struct net_device
*dev
,
994 struct net_device
*slave_dev
);
995 int (*ndo_del_slave
)(struct net_device
*dev
,
996 struct net_device
*slave_dev
);
997 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
998 netdev_features_t features
);
999 int (*ndo_set_features
)(struct net_device
*dev
,
1000 netdev_features_t features
);
1001 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1002 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1004 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1005 struct nlattr
*tb
[],
1006 struct net_device
*dev
,
1007 const unsigned char *addr
,
1009 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1010 struct nlattr
*tb
[],
1011 struct net_device
*dev
,
1012 const unsigned char *addr
);
1013 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1014 struct netlink_callback
*cb
,
1015 struct net_device
*dev
,
1018 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1019 struct nlmsghdr
*nlh
);
1020 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1022 struct net_device
*dev
,
1024 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1025 struct nlmsghdr
*nlh
);
1026 int (*ndo_change_carrier
)(struct net_device
*dev
,
1031 * The DEVICE structure.
1032 * Actually, this whole structure is a big mistake. It mixes I/O
1033 * data with strictly "high-level" data, and it has to know about
1034 * almost every data structure used in the INET module.
1036 * FIXME: cleanup struct net_device such that network protocol info
1043 * This is the first field of the "visible" part of this structure
1044 * (i.e. as seen by users in the "Space.c" file). It is the name
1047 char name
[IFNAMSIZ
];
1049 /* device name hash chain, please keep it close to name[] */
1050 struct hlist_node name_hlist
;
1056 * I/O specific fields
1057 * FIXME: Merge these and struct ifmap into one
1059 unsigned long mem_end
; /* shared mem end */
1060 unsigned long mem_start
; /* shared mem start */
1061 unsigned long base_addr
; /* device I/O address */
1062 unsigned int irq
; /* device IRQ number */
1065 * Some hardware also needs these fields, but they are not
1066 * part of the usual set specified in Space.c.
1069 unsigned long state
;
1071 struct list_head dev_list
;
1072 struct list_head napi_list
;
1073 struct list_head unreg_list
;
1074 struct list_head upper_dev_list
; /* List of upper devices */
1077 /* currently active device features */
1078 netdev_features_t features
;
1079 /* user-changeable features */
1080 netdev_features_t hw_features
;
1081 /* user-requested features */
1082 netdev_features_t wanted_features
;
1083 /* mask of features inheritable by VLAN devices */
1084 netdev_features_t vlan_features
;
1085 /* mask of features inherited by encapsulating devices
1086 * This field indicates what encapsulation offloads
1087 * the hardware is capable of doing, and drivers will
1088 * need to set them appropriately.
1090 netdev_features_t hw_enc_features
;
1091 /* mask of fetures inheritable by MPLS */
1092 netdev_features_t mpls_features
;
1094 /* Interface index. Unique device identifier */
1098 struct net_device_stats stats
;
1099 atomic_long_t rx_dropped
; /* dropped packets by core network
1100 * Do not use this in drivers.
1103 #ifdef CONFIG_WIRELESS_EXT
1104 /* List of functions to handle Wireless Extensions (instead of ioctl).
1105 * See <net/iw_handler.h> for details. Jean II */
1106 const struct iw_handler_def
* wireless_handlers
;
1107 /* Instance data managed by the core of Wireless Extensions. */
1108 struct iw_public_data
* wireless_data
;
1110 /* Management operations */
1111 const struct net_device_ops
*netdev_ops
;
1112 const struct ethtool_ops
*ethtool_ops
;
1114 /* Hardware header description */
1115 const struct header_ops
*header_ops
;
1117 unsigned int flags
; /* interface flags (a la BSD) */
1118 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1119 * See if.h for definitions. */
1120 unsigned short gflags
;
1121 unsigned short padded
; /* How much padding added by alloc_netdev() */
1123 unsigned char operstate
; /* RFC2863 operstate */
1124 unsigned char link_mode
; /* mapping policy to operstate */
1126 unsigned char if_port
; /* Selectable AUI, TP,..*/
1127 unsigned char dma
; /* DMA channel */
1129 unsigned int mtu
; /* interface MTU value */
1130 unsigned short type
; /* interface hardware type */
1131 unsigned short hard_header_len
; /* hardware hdr length */
1133 /* extra head- and tailroom the hardware may need, but not in all cases
1134 * can this be guaranteed, especially tailroom. Some cases also use
1135 * LL_MAX_HEADER instead to allocate the skb.
1137 unsigned short needed_headroom
;
1138 unsigned short needed_tailroom
;
1140 /* Interface address info. */
1141 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1142 unsigned char addr_assign_type
; /* hw address assignment type */
1143 unsigned char addr_len
; /* hardware address length */
1144 unsigned char neigh_priv_len
;
1145 unsigned short dev_id
; /* for shared network cards */
1147 spinlock_t addr_list_lock
;
1148 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1149 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1150 struct netdev_hw_addr_list dev_addrs
; /* list of device
1154 struct kset
*queues_kset
;
1158 unsigned int promiscuity
;
1159 unsigned int allmulti
;
1162 /* Protocol specific pointers */
1164 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1165 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1167 #if IS_ENABLED(CONFIG_NET_DSA)
1168 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1170 void *atalk_ptr
; /* AppleTalk link */
1171 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1172 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1173 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1174 void *ax25_ptr
; /* AX.25 specific data */
1175 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1176 assign before registering */
1179 * Cache lines mostly used on receive path (including eth_type_trans())
1181 unsigned long last_rx
; /* Time of last Rx
1182 * This should not be set in
1183 * drivers, unless really needed,
1184 * because network stack (bonding)
1185 * use it if/when necessary, to
1186 * avoid dirtying this cache line.
1189 /* Interface address info used in eth_type_trans() */
1190 unsigned char *dev_addr
; /* hw address, (before bcast
1191 because most packets are
1196 struct netdev_rx_queue
*_rx
;
1198 /* Number of RX queues allocated at register_netdev() time */
1199 unsigned int num_rx_queues
;
1201 /* Number of RX queues currently active in device */
1202 unsigned int real_num_rx_queues
;
1206 rx_handler_func_t __rcu
*rx_handler
;
1207 void __rcu
*rx_handler_data
;
1209 struct netdev_queue __rcu
*ingress_queue
;
1210 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1214 * Cache lines mostly used on transmit path
1216 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1218 /* Number of TX queues allocated at alloc_netdev_mq() time */
1219 unsigned int num_tx_queues
;
1221 /* Number of TX queues currently active in device */
1222 unsigned int real_num_tx_queues
;
1224 /* root qdisc from userspace point of view */
1225 struct Qdisc
*qdisc
;
1227 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1228 spinlock_t tx_global_lock
;
1231 struct xps_dev_maps __rcu
*xps_maps
;
1233 #ifdef CONFIG_RFS_ACCEL
1234 /* CPU reverse-mapping for RX completion interrupts, indexed
1235 * by RX queue number. Assigned by driver. This must only be
1236 * set if the ndo_rx_flow_steer operation is defined. */
1237 struct cpu_rmap
*rx_cpu_rmap
;
1240 /* These may be needed for future network-power-down code. */
1243 * trans_start here is expensive for high speed devices on SMP,
1244 * please use netdev_queue->trans_start instead.
1246 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1248 int watchdog_timeo
; /* used by dev_watchdog() */
1249 struct timer_list watchdog_timer
;
1251 /* Number of references to this device */
1252 int __percpu
*pcpu_refcnt
;
1254 /* delayed register/unregister */
1255 struct list_head todo_list
;
1256 /* device index hash chain */
1257 struct hlist_node index_hlist
;
1259 struct list_head link_watch_list
;
1261 /* register/unregister state machine */
1262 enum { NETREG_UNINITIALIZED
=0,
1263 NETREG_REGISTERED
, /* completed register_netdevice */
1264 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1265 NETREG_UNREGISTERED
, /* completed unregister todo */
1266 NETREG_RELEASED
, /* called free_netdev */
1267 NETREG_DUMMY
, /* dummy device for NAPI poll */
1270 bool dismantle
; /* device is going do be freed */
1273 RTNL_LINK_INITIALIZED
,
1274 RTNL_LINK_INITIALIZING
,
1275 } rtnl_link_state
:16;
1277 /* Called from unregister, can be used to call free_netdev */
1278 void (*destructor
)(struct net_device
*dev
);
1280 #ifdef CONFIG_NETPOLL
1281 struct netpoll_info __rcu
*npinfo
;
1284 #ifdef CONFIG_NET_NS
1285 /* Network namespace this network device is inside */
1289 /* mid-layer private */
1292 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1293 struct pcpu_tstats __percpu
*tstats
; /* tunnel stats */
1294 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1295 struct pcpu_vstats __percpu
*vstats
; /* veth stats */
1298 struct garp_port __rcu
*garp_port
;
1300 struct mrp_port __rcu
*mrp_port
;
1302 /* class/net/name entry */
1304 /* space for optional device, statistics, and wireless sysfs groups */
1305 const struct attribute_group
*sysfs_groups
[4];
1307 /* rtnetlink link ops */
1308 const struct rtnl_link_ops
*rtnl_link_ops
;
1310 /* for setting kernel sock attribute on TCP connection setup */
1311 #define GSO_MAX_SIZE 65536
1312 unsigned int gso_max_size
;
1313 #define GSO_MAX_SEGS 65535
1317 /* Data Center Bridging netlink ops */
1318 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1321 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1322 u8 prio_tc_map
[TC_BITMASK
+ 1];
1324 #if IS_ENABLED(CONFIG_FCOE)
1325 /* max exchange id for FCoE LRO by ddp */
1326 unsigned int fcoe_ddp_xid
;
1328 #if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1329 struct netprio_map __rcu
*priomap
;
1331 /* phy device may attach itself for hardware timestamping */
1332 struct phy_device
*phydev
;
1334 struct lock_class_key
*qdisc_tx_busylock
;
1336 /* group the device belongs to */
1339 struct pm_qos_request pm_qos_req
;
1341 #define to_net_dev(d) container_of(d, struct net_device, dev)
1343 #define NETDEV_ALIGN 32
1346 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1348 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1352 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1354 if (tc
>= dev
->num_tc
)
1357 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1362 void netdev_reset_tc(struct net_device
*dev
)
1365 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1366 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1370 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1372 if (tc
>= dev
->num_tc
)
1375 dev
->tc_to_txq
[tc
].count
= count
;
1376 dev
->tc_to_txq
[tc
].offset
= offset
;
1381 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1383 if (num_tc
> TC_MAX_QUEUE
)
1386 dev
->num_tc
= num_tc
;
1391 int netdev_get_num_tc(struct net_device
*dev
)
1397 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1400 return &dev
->_tx
[index
];
1403 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1404 void (*f
)(struct net_device
*,
1405 struct netdev_queue
*,
1411 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1412 f(dev
, &dev
->_tx
[i
], arg
);
1415 extern struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1416 struct sk_buff
*skb
);
1417 extern u16
__netdev_pick_tx(struct net_device
*dev
, struct sk_buff
*skb
);
1420 * Net namespace inlines
1423 struct net
*dev_net(const struct net_device
*dev
)
1425 return read_pnet(&dev
->nd_net
);
1429 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1431 #ifdef CONFIG_NET_NS
1432 release_net(dev
->nd_net
);
1433 dev
->nd_net
= hold_net(net
);
1437 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1439 #ifdef CONFIG_NET_DSA_TAG_DSA
1440 if (dev
->dsa_ptr
!= NULL
)
1441 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1447 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1449 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1450 if (dev
->dsa_ptr
!= NULL
)
1451 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1458 * netdev_priv - access network device private data
1459 * @dev: network device
1461 * Get network device private data
1463 static inline void *netdev_priv(const struct net_device
*dev
)
1465 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1468 /* Set the sysfs physical device reference for the network logical device
1469 * if set prior to registration will cause a symlink during initialization.
1471 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1473 /* Set the sysfs device type for the network logical device to allow
1474 * fin grained indentification of different network device types. For
1475 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1477 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1479 /* Default NAPI poll() weight
1480 * Device drivers are strongly advised to not use bigger value
1482 #define NAPI_POLL_WEIGHT 64
1485 * netif_napi_add - initialize a napi context
1486 * @dev: network device
1487 * @napi: napi context
1488 * @poll: polling function
1489 * @weight: default weight
1491 * netif_napi_add() must be used to initialize a napi context prior to calling
1492 * *any* of the other napi related functions.
1494 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1495 int (*poll
)(struct napi_struct
*, int), int weight
);
1498 * netif_napi_del - remove a napi context
1499 * @napi: napi context
1501 * netif_napi_del() removes a napi context from the network device napi list
1503 void netif_napi_del(struct napi_struct
*napi
);
1505 struct napi_gro_cb
{
1506 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1509 /* Length of frag0. */
1510 unsigned int frag0_len
;
1512 /* This indicates where we are processing relative to skb->data. */
1515 /* This is non-zero if the packet cannot be merged with the new skb. */
1518 /* Number of segments aggregated. */
1521 /* This is non-zero if the packet may be of the same flow. */
1526 #define NAPI_GRO_FREE 1
1527 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1529 /* jiffies when first packet was created/queued */
1532 /* Used in ipv6_gro_receive() */
1535 /* used in skb_gro_receive() slow path */
1536 struct sk_buff
*last
;
1539 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1541 struct packet_type
{
1542 __be16 type
; /* This is really htons(ether_type). */
1543 struct net_device
*dev
; /* NULL is wildcarded here */
1544 int (*func
) (struct sk_buff
*,
1545 struct net_device
*,
1546 struct packet_type
*,
1547 struct net_device
*);
1548 bool (*id_match
)(struct packet_type
*ptype
,
1550 void *af_packet_priv
;
1551 struct list_head list
;
1554 struct offload_callbacks
{
1555 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1556 netdev_features_t features
);
1557 int (*gso_send_check
)(struct sk_buff
*skb
);
1558 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1559 struct sk_buff
*skb
);
1560 int (*gro_complete
)(struct sk_buff
*skb
);
1563 struct packet_offload
{
1564 __be16 type
; /* This is really htons(ether_type). */
1565 struct offload_callbacks callbacks
;
1566 struct list_head list
;
1569 #include <linux/notifier.h>
1571 /* netdevice notifier chain. Please remember to update the rtnetlink
1572 * notification exclusion list in rtnetlink_event() when adding new
1575 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1576 #define NETDEV_DOWN 0x0002
1577 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1578 detected a hardware crash and restarted
1579 - we can use this eg to kick tcp sessions
1581 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1582 #define NETDEV_REGISTER 0x0005
1583 #define NETDEV_UNREGISTER 0x0006
1584 #define NETDEV_CHANGEMTU 0x0007
1585 #define NETDEV_CHANGEADDR 0x0008
1586 #define NETDEV_GOING_DOWN 0x0009
1587 #define NETDEV_CHANGENAME 0x000A
1588 #define NETDEV_FEAT_CHANGE 0x000B
1589 #define NETDEV_BONDING_FAILOVER 0x000C
1590 #define NETDEV_PRE_UP 0x000D
1591 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1592 #define NETDEV_POST_TYPE_CHANGE 0x000F
1593 #define NETDEV_POST_INIT 0x0010
1594 #define NETDEV_UNREGISTER_FINAL 0x0011
1595 #define NETDEV_RELEASE 0x0012
1596 #define NETDEV_NOTIFY_PEERS 0x0013
1597 #define NETDEV_JOIN 0x0014
1598 #define NETDEV_CHANGEUPPER 0x0015
1600 extern int register_netdevice_notifier(struct notifier_block
*nb
);
1601 extern int unregister_netdevice_notifier(struct notifier_block
*nb
);
1603 struct netdev_notifier_info
{
1604 struct net_device
*dev
;
1607 struct netdev_notifier_change_info
{
1608 struct netdev_notifier_info info
; /* must be first */
1609 unsigned int flags_changed
;
1612 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
1613 struct net_device
*dev
)
1618 static inline struct net_device
*
1619 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
1624 extern int call_netdevice_notifiers_info(unsigned long val
, struct net_device
*dev
,
1625 struct netdev_notifier_info
*info
);
1626 extern int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1629 extern rwlock_t dev_base_lock
; /* Device list lock */
1631 extern seqcount_t devnet_rename_seq
; /* Device rename seq */
1634 #define for_each_netdev(net, d) \
1635 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1636 #define for_each_netdev_reverse(net, d) \
1637 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1638 #define for_each_netdev_rcu(net, d) \
1639 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1640 #define for_each_netdev_safe(net, d, n) \
1641 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1642 #define for_each_netdev_continue(net, d) \
1643 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1644 #define for_each_netdev_continue_rcu(net, d) \
1645 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1646 #define for_each_netdev_in_bond_rcu(bond, slave) \
1647 for_each_netdev_rcu(&init_net, slave) \
1648 if (netdev_master_upper_dev_get_rcu(slave) == bond)
1649 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1651 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1653 struct list_head
*lh
;
1657 lh
= dev
->dev_list
.next
;
1658 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1661 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1663 struct list_head
*lh
;
1667 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1668 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1671 static inline struct net_device
*first_net_device(struct net
*net
)
1673 return list_empty(&net
->dev_base_head
) ? NULL
:
1674 net_device_entry(net
->dev_base_head
.next
);
1677 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1679 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1681 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1684 extern int netdev_boot_setup_check(struct net_device
*dev
);
1685 extern unsigned long netdev_boot_base(const char *prefix
, int unit
);
1686 extern struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1687 const char *hwaddr
);
1688 extern struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1689 extern struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1690 extern void dev_add_pack(struct packet_type
*pt
);
1691 extern void dev_remove_pack(struct packet_type
*pt
);
1692 extern void __dev_remove_pack(struct packet_type
*pt
);
1693 extern void dev_add_offload(struct packet_offload
*po
);
1694 extern void dev_remove_offload(struct packet_offload
*po
);
1695 extern void __dev_remove_offload(struct packet_offload
*po
);
1697 extern struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1698 unsigned short mask
);
1699 extern struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1700 extern struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1701 extern struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1702 extern int dev_alloc_name(struct net_device
*dev
, const char *name
);
1703 extern int dev_open(struct net_device
*dev
);
1704 extern int dev_close(struct net_device
*dev
);
1705 extern void dev_disable_lro(struct net_device
*dev
);
1706 extern int dev_loopback_xmit(struct sk_buff
*newskb
);
1707 extern int dev_queue_xmit(struct sk_buff
*skb
);
1708 extern int register_netdevice(struct net_device
*dev
);
1709 extern void unregister_netdevice_queue(struct net_device
*dev
,
1710 struct list_head
*head
);
1711 extern void unregister_netdevice_many(struct list_head
*head
);
1712 static inline void unregister_netdevice(struct net_device
*dev
)
1714 unregister_netdevice_queue(dev
, NULL
);
1717 extern int netdev_refcnt_read(const struct net_device
*dev
);
1718 extern void free_netdev(struct net_device
*dev
);
1719 extern void synchronize_net(void);
1720 extern int init_dummy_netdev(struct net_device
*dev
);
1722 extern struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1723 extern struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1724 extern struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1725 extern int dev_restart(struct net_device
*dev
);
1726 #ifdef CONFIG_NETPOLL_TRAP
1727 extern int netpoll_trap(void);
1729 extern int skb_gro_receive(struct sk_buff
**head
,
1730 struct sk_buff
*skb
);
1732 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1734 return NAPI_GRO_CB(skb
)->data_offset
;
1737 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1739 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1742 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1744 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1747 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1748 unsigned int offset
)
1750 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1753 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
1755 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
1758 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
1759 unsigned int offset
)
1761 if (!pskb_may_pull(skb
, hlen
))
1764 NAPI_GRO_CB(skb
)->frag0
= NULL
;
1765 NAPI_GRO_CB(skb
)->frag0_len
= 0;
1766 return skb
->data
+ offset
;
1769 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
1771 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
1774 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
1776 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
1777 skb_network_offset(skb
);
1780 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
1781 unsigned short type
,
1782 const void *daddr
, const void *saddr
,
1785 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
1788 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
1791 static inline int dev_parse_header(const struct sk_buff
*skb
,
1792 unsigned char *haddr
)
1794 const struct net_device
*dev
= skb
->dev
;
1796 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
1798 return dev
->header_ops
->parse(skb
, haddr
);
1801 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
1802 extern int register_gifconf(unsigned int family
, gifconf_func_t
* gifconf
);
1803 static inline int unregister_gifconf(unsigned int family
)
1805 return register_gifconf(family
, NULL
);
1808 #ifdef CONFIG_NET_FLOW_LIMIT
1809 #define FLOW_LIMIT_HISTORY (1 << 8) /* must be ^2 */
1810 struct sd_flow_limit
{
1812 unsigned int num_buckets
;
1813 unsigned int history_head
;
1814 u16 history
[FLOW_LIMIT_HISTORY
];
1818 extern int netdev_flow_limit_table_len
;
1819 #endif /* CONFIG_NET_FLOW_LIMIT */
1822 * Incoming packets are placed on per-cpu queues
1824 struct softnet_data
{
1825 struct Qdisc
*output_queue
;
1826 struct Qdisc
**output_queue_tailp
;
1827 struct list_head poll_list
;
1828 struct sk_buff
*completion_queue
;
1829 struct sk_buff_head process_queue
;
1832 unsigned int processed
;
1833 unsigned int time_squeeze
;
1834 unsigned int cpu_collision
;
1835 unsigned int received_rps
;
1838 struct softnet_data
*rps_ipi_list
;
1840 /* Elements below can be accessed between CPUs for RPS */
1841 struct call_single_data csd ____cacheline_aligned_in_smp
;
1842 struct softnet_data
*rps_ipi_next
;
1844 unsigned int input_queue_head
;
1845 unsigned int input_queue_tail
;
1847 unsigned int dropped
;
1848 struct sk_buff_head input_pkt_queue
;
1849 struct napi_struct backlog
;
1851 #ifdef CONFIG_NET_FLOW_LIMIT
1852 struct sd_flow_limit
*flow_limit
;
1856 static inline void input_queue_head_incr(struct softnet_data
*sd
)
1859 sd
->input_queue_head
++;
1863 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
1864 unsigned int *qtail
)
1867 *qtail
= ++sd
->input_queue_tail
;
1871 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
1873 extern void __netif_schedule(struct Qdisc
*q
);
1875 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
1877 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
1878 __netif_schedule(txq
->qdisc
);
1881 static inline void netif_tx_schedule_all(struct net_device
*dev
)
1885 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1886 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
1889 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
1891 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1895 * netif_start_queue - allow transmit
1896 * @dev: network device
1898 * Allow upper layers to call the device hard_start_xmit routine.
1900 static inline void netif_start_queue(struct net_device
*dev
)
1902 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
1905 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
1909 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1910 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1911 netif_tx_start_queue(txq
);
1915 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
1917 #ifdef CONFIG_NETPOLL_TRAP
1918 if (netpoll_trap()) {
1919 netif_tx_start_queue(dev_queue
);
1923 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
1924 __netif_schedule(dev_queue
->qdisc
);
1928 * netif_wake_queue - restart transmit
1929 * @dev: network device
1931 * Allow upper layers to call the device hard_start_xmit routine.
1932 * Used for flow control when transmit resources are available.
1934 static inline void netif_wake_queue(struct net_device
*dev
)
1936 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
1939 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
1943 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1944 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1945 netif_tx_wake_queue(txq
);
1949 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
1951 if (WARN_ON(!dev_queue
)) {
1952 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1955 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1959 * netif_stop_queue - stop transmitted packets
1960 * @dev: network device
1962 * Stop upper layers calling the device hard_start_xmit routine.
1963 * Used for flow control when transmit resources are unavailable.
1965 static inline void netif_stop_queue(struct net_device
*dev
)
1967 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
1970 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
1974 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
1975 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
1976 netif_tx_stop_queue(txq
);
1980 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
1982 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
1986 * netif_queue_stopped - test if transmit queue is flowblocked
1987 * @dev: network device
1989 * Test if transmit queue on device is currently unable to send.
1991 static inline bool netif_queue_stopped(const struct net_device
*dev
)
1993 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
1996 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
1998 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2001 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2003 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2006 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2010 dql_queued(&dev_queue
->dql
, bytes
);
2012 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2015 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2018 * The XOFF flag must be set before checking the dql_avail below,
2019 * because in netdev_tx_completed_queue we update the dql_completed
2020 * before checking the XOFF flag.
2024 /* check again in case another CPU has just made room avail */
2025 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2026 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2030 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2032 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2035 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2036 unsigned int pkts
, unsigned int bytes
)
2039 if (unlikely(!bytes
))
2042 dql_completed(&dev_queue
->dql
, bytes
);
2045 * Without the memory barrier there is a small possiblity that
2046 * netdev_tx_sent_queue will miss the update and cause the queue to
2047 * be stopped forever
2051 if (dql_avail(&dev_queue
->dql
) < 0)
2054 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2055 netif_schedule_queue(dev_queue
);
2059 static inline void netdev_completed_queue(struct net_device
*dev
,
2060 unsigned int pkts
, unsigned int bytes
)
2062 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2065 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2068 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2073 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2075 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2079 * netif_running - test if up
2080 * @dev: network device
2082 * Test if the device has been brought up.
2084 static inline bool netif_running(const struct net_device
*dev
)
2086 return test_bit(__LINK_STATE_START
, &dev
->state
);
2090 * Routines to manage the subqueues on a device. We only need start
2091 * stop, and a check if it's stopped. All other device management is
2092 * done at the overall netdevice level.
2093 * Also test the device if we're multiqueue.
2097 * netif_start_subqueue - allow sending packets on subqueue
2098 * @dev: network device
2099 * @queue_index: sub queue index
2101 * Start individual transmit queue of a device with multiple transmit queues.
2103 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2105 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2107 netif_tx_start_queue(txq
);
2111 * netif_stop_subqueue - stop sending packets on subqueue
2112 * @dev: network device
2113 * @queue_index: sub queue index
2115 * Stop individual transmit queue of a device with multiple transmit queues.
2117 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2119 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2120 #ifdef CONFIG_NETPOLL_TRAP
2124 netif_tx_stop_queue(txq
);
2128 * netif_subqueue_stopped - test status of subqueue
2129 * @dev: network device
2130 * @queue_index: sub queue index
2132 * Check individual transmit queue of a device with multiple transmit queues.
2134 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2137 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2139 return netif_tx_queue_stopped(txq
);
2142 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2143 struct sk_buff
*skb
)
2145 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2149 * netif_wake_subqueue - allow sending packets on subqueue
2150 * @dev: network device
2151 * @queue_index: sub queue index
2153 * Resume individual transmit queue of a device with multiple transmit queues.
2155 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2157 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2158 #ifdef CONFIG_NETPOLL_TRAP
2162 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2163 __netif_schedule(txq
->qdisc
);
2167 extern int netif_set_xps_queue(struct net_device
*dev
, struct cpumask
*mask
,
2170 static inline int netif_set_xps_queue(struct net_device
*dev
,
2171 struct cpumask
*mask
,
2179 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2180 * as a distribution range limit for the returned value.
2182 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2183 const struct sk_buff
*skb
)
2185 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2189 * netif_is_multiqueue - test if device has multiple transmit queues
2190 * @dev: network device
2192 * Check if device has multiple transmit queues
2194 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2196 return dev
->num_tx_queues
> 1;
2199 extern int netif_set_real_num_tx_queues(struct net_device
*dev
,
2203 extern int netif_set_real_num_rx_queues(struct net_device
*dev
,
2206 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2213 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2214 const struct net_device
*from_dev
)
2218 err
= netif_set_real_num_tx_queues(to_dev
,
2219 from_dev
->real_num_tx_queues
);
2223 return netif_set_real_num_rx_queues(to_dev
,
2224 from_dev
->real_num_rx_queues
);
2230 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2231 extern int netif_get_num_default_rss_queues(void);
2233 /* Use this variant when it is known for sure that it
2234 * is executing from hardware interrupt context or with hardware interrupts
2237 extern void dev_kfree_skb_irq(struct sk_buff
*skb
);
2239 /* Use this variant in places where it could be invoked
2240 * from either hardware interrupt or other context, with hardware interrupts
2241 * either disabled or enabled.
2243 extern void dev_kfree_skb_any(struct sk_buff
*skb
);
2245 extern int netif_rx(struct sk_buff
*skb
);
2246 extern int netif_rx_ni(struct sk_buff
*skb
);
2247 extern int netif_receive_skb(struct sk_buff
*skb
);
2248 extern gro_result_t
napi_gro_receive(struct napi_struct
*napi
,
2249 struct sk_buff
*skb
);
2250 extern void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2251 extern struct sk_buff
* napi_get_frags(struct napi_struct
*napi
);
2252 extern gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2254 static inline void napi_free_frags(struct napi_struct
*napi
)
2256 kfree_skb(napi
->skb
);
2260 extern int netdev_rx_handler_register(struct net_device
*dev
,
2261 rx_handler_func_t
*rx_handler
,
2262 void *rx_handler_data
);
2263 extern void netdev_rx_handler_unregister(struct net_device
*dev
);
2265 extern bool dev_valid_name(const char *name
);
2266 extern int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2267 extern int dev_ethtool(struct net
*net
, struct ifreq
*);
2268 extern unsigned int dev_get_flags(const struct net_device
*);
2269 extern int __dev_change_flags(struct net_device
*, unsigned int flags
);
2270 extern int dev_change_flags(struct net_device
*, unsigned int);
2271 extern void __dev_notify_flags(struct net_device
*, unsigned int old_flags
);
2272 extern int dev_change_name(struct net_device
*, const char *);
2273 extern int dev_set_alias(struct net_device
*, const char *, size_t);
2274 extern int dev_change_net_namespace(struct net_device
*,
2275 struct net
*, const char *);
2276 extern int dev_set_mtu(struct net_device
*, int);
2277 extern void dev_set_group(struct net_device
*, int);
2278 extern int dev_set_mac_address(struct net_device
*,
2280 extern int dev_change_carrier(struct net_device
*,
2282 extern int dev_hard_start_xmit(struct sk_buff
*skb
,
2283 struct net_device
*dev
,
2284 struct netdev_queue
*txq
);
2285 extern int dev_forward_skb(struct net_device
*dev
,
2286 struct sk_buff
*skb
);
2288 extern int netdev_budget
;
2290 /* Called by rtnetlink.c:rtnl_unlock() */
2291 extern void netdev_run_todo(void);
2294 * dev_put - release reference to device
2295 * @dev: network device
2297 * Release reference to device to allow it to be freed.
2299 static inline void dev_put(struct net_device
*dev
)
2301 this_cpu_dec(*dev
->pcpu_refcnt
);
2305 * dev_hold - get reference to device
2306 * @dev: network device
2308 * Hold reference to device to keep it from being freed.
2310 static inline void dev_hold(struct net_device
*dev
)
2312 this_cpu_inc(*dev
->pcpu_refcnt
);
2315 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2316 * and _off may be called from IRQ context, but it is caller
2317 * who is responsible for serialization of these calls.
2319 * The name carrier is inappropriate, these functions should really be
2320 * called netif_lowerlayer_*() because they represent the state of any
2321 * kind of lower layer not just hardware media.
2324 extern void linkwatch_init_dev(struct net_device
*dev
);
2325 extern void linkwatch_fire_event(struct net_device
*dev
);
2326 extern void linkwatch_forget_dev(struct net_device
*dev
);
2329 * netif_carrier_ok - test if carrier present
2330 * @dev: network device
2332 * Check if carrier is present on device
2334 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2336 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2339 extern unsigned long dev_trans_start(struct net_device
*dev
);
2341 extern void __netdev_watchdog_up(struct net_device
*dev
);
2343 extern void netif_carrier_on(struct net_device
*dev
);
2345 extern void netif_carrier_off(struct net_device
*dev
);
2348 * netif_dormant_on - mark device as dormant.
2349 * @dev: network device
2351 * Mark device as dormant (as per RFC2863).
2353 * The dormant state indicates that the relevant interface is not
2354 * actually in a condition to pass packets (i.e., it is not 'up') but is
2355 * in a "pending" state, waiting for some external event. For "on-
2356 * demand" interfaces, this new state identifies the situation where the
2357 * interface is waiting for events to place it in the up state.
2360 static inline void netif_dormant_on(struct net_device
*dev
)
2362 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2363 linkwatch_fire_event(dev
);
2367 * netif_dormant_off - set device as not dormant.
2368 * @dev: network device
2370 * Device is not in dormant state.
2372 static inline void netif_dormant_off(struct net_device
*dev
)
2374 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2375 linkwatch_fire_event(dev
);
2379 * netif_dormant - test if carrier present
2380 * @dev: network device
2382 * Check if carrier is present on device
2384 static inline bool netif_dormant(const struct net_device
*dev
)
2386 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2391 * netif_oper_up - test if device is operational
2392 * @dev: network device
2394 * Check if carrier is operational
2396 static inline bool netif_oper_up(const struct net_device
*dev
)
2398 return (dev
->operstate
== IF_OPER_UP
||
2399 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2403 * netif_device_present - is device available or removed
2404 * @dev: network device
2406 * Check if device has not been removed from system.
2408 static inline bool netif_device_present(struct net_device
*dev
)
2410 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2413 extern void netif_device_detach(struct net_device
*dev
);
2415 extern void netif_device_attach(struct net_device
*dev
);
2418 * Network interface message level settings
2422 NETIF_MSG_DRV
= 0x0001,
2423 NETIF_MSG_PROBE
= 0x0002,
2424 NETIF_MSG_LINK
= 0x0004,
2425 NETIF_MSG_TIMER
= 0x0008,
2426 NETIF_MSG_IFDOWN
= 0x0010,
2427 NETIF_MSG_IFUP
= 0x0020,
2428 NETIF_MSG_RX_ERR
= 0x0040,
2429 NETIF_MSG_TX_ERR
= 0x0080,
2430 NETIF_MSG_TX_QUEUED
= 0x0100,
2431 NETIF_MSG_INTR
= 0x0200,
2432 NETIF_MSG_TX_DONE
= 0x0400,
2433 NETIF_MSG_RX_STATUS
= 0x0800,
2434 NETIF_MSG_PKTDATA
= 0x1000,
2435 NETIF_MSG_HW
= 0x2000,
2436 NETIF_MSG_WOL
= 0x4000,
2439 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2440 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2441 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2442 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2443 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2444 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2445 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2446 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2447 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2448 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2449 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2450 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2451 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2452 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2453 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2455 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2458 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2459 return default_msg_enable_bits
;
2460 if (debug_value
== 0) /* no output */
2462 /* set low N bits */
2463 return (1 << debug_value
) - 1;
2466 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2468 spin_lock(&txq
->_xmit_lock
);
2469 txq
->xmit_lock_owner
= cpu
;
2472 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2474 spin_lock_bh(&txq
->_xmit_lock
);
2475 txq
->xmit_lock_owner
= smp_processor_id();
2478 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2480 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2482 txq
->xmit_lock_owner
= smp_processor_id();
2486 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2488 txq
->xmit_lock_owner
= -1;
2489 spin_unlock(&txq
->_xmit_lock
);
2492 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2494 txq
->xmit_lock_owner
= -1;
2495 spin_unlock_bh(&txq
->_xmit_lock
);
2498 static inline void txq_trans_update(struct netdev_queue
*txq
)
2500 if (txq
->xmit_lock_owner
!= -1)
2501 txq
->trans_start
= jiffies
;
2505 * netif_tx_lock - grab network device transmit lock
2506 * @dev: network device
2508 * Get network device transmit lock
2510 static inline void netif_tx_lock(struct net_device
*dev
)
2515 spin_lock(&dev
->tx_global_lock
);
2516 cpu
= smp_processor_id();
2517 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2518 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2520 /* We are the only thread of execution doing a
2521 * freeze, but we have to grab the _xmit_lock in
2522 * order to synchronize with threads which are in
2523 * the ->hard_start_xmit() handler and already
2524 * checked the frozen bit.
2526 __netif_tx_lock(txq
, cpu
);
2527 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2528 __netif_tx_unlock(txq
);
2532 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2538 static inline void netif_tx_unlock(struct net_device
*dev
)
2542 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2543 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2545 /* No need to grab the _xmit_lock here. If the
2546 * queue is not stopped for another reason, we
2549 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2550 netif_schedule_queue(txq
);
2552 spin_unlock(&dev
->tx_global_lock
);
2555 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2557 netif_tx_unlock(dev
);
2561 #define HARD_TX_LOCK(dev, txq, cpu) { \
2562 if ((dev->features & NETIF_F_LLTX) == 0) { \
2563 __netif_tx_lock(txq, cpu); \
2567 #define HARD_TX_UNLOCK(dev, txq) { \
2568 if ((dev->features & NETIF_F_LLTX) == 0) { \
2569 __netif_tx_unlock(txq); \
2573 static inline void netif_tx_disable(struct net_device
*dev
)
2579 cpu
= smp_processor_id();
2580 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2581 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2583 __netif_tx_lock(txq
, cpu
);
2584 netif_tx_stop_queue(txq
);
2585 __netif_tx_unlock(txq
);
2590 static inline void netif_addr_lock(struct net_device
*dev
)
2592 spin_lock(&dev
->addr_list_lock
);
2595 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2597 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2600 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2602 spin_lock_bh(&dev
->addr_list_lock
);
2605 static inline void netif_addr_unlock(struct net_device
*dev
)
2607 spin_unlock(&dev
->addr_list_lock
);
2610 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2612 spin_unlock_bh(&dev
->addr_list_lock
);
2616 * dev_addrs walker. Should be used only for read access. Call with
2617 * rcu_read_lock held.
2619 #define for_each_dev_addr(dev, ha) \
2620 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2622 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2624 extern void ether_setup(struct net_device
*dev
);
2626 /* Support for loadable net-drivers */
2627 extern struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2628 void (*setup
)(struct net_device
*),
2629 unsigned int txqs
, unsigned int rxqs
);
2630 #define alloc_netdev(sizeof_priv, name, setup) \
2631 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2633 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2634 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2636 extern int register_netdev(struct net_device
*dev
);
2637 extern void unregister_netdev(struct net_device
*dev
);
2639 /* General hardware address lists handling functions */
2640 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list
*to_list
,
2641 struct netdev_hw_addr_list
*from_list
,
2642 int addr_len
, unsigned char addr_type
);
2643 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list
*to_list
,
2644 struct netdev_hw_addr_list
*from_list
,
2645 int addr_len
, unsigned char addr_type
);
2646 extern int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2647 struct netdev_hw_addr_list
*from_list
,
2649 extern void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2650 struct netdev_hw_addr_list
*from_list
,
2652 extern void __hw_addr_flush(struct netdev_hw_addr_list
*list
);
2653 extern void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2655 /* Functions used for device addresses handling */
2656 extern int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
2657 unsigned char addr_type
);
2658 extern int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
2659 unsigned char addr_type
);
2660 extern int dev_addr_add_multiple(struct net_device
*to_dev
,
2661 struct net_device
*from_dev
,
2662 unsigned char addr_type
);
2663 extern int dev_addr_del_multiple(struct net_device
*to_dev
,
2664 struct net_device
*from_dev
,
2665 unsigned char addr_type
);
2666 extern void dev_addr_flush(struct net_device
*dev
);
2667 extern int dev_addr_init(struct net_device
*dev
);
2669 /* Functions used for unicast addresses handling */
2670 extern int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
2671 extern int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2672 extern int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
2673 extern int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
2674 extern int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
2675 extern void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
2676 extern void dev_uc_flush(struct net_device
*dev
);
2677 extern void dev_uc_init(struct net_device
*dev
);
2679 /* Functions used for multicast addresses handling */
2680 extern int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
2681 extern int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
2682 extern int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
2683 extern int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
2684 extern int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
2685 extern int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
2686 extern int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
2687 extern void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
2688 extern void dev_mc_flush(struct net_device
*dev
);
2689 extern void dev_mc_init(struct net_device
*dev
);
2691 /* Functions used for secondary unicast and multicast support */
2692 extern void dev_set_rx_mode(struct net_device
*dev
);
2693 extern void __dev_set_rx_mode(struct net_device
*dev
);
2694 extern int dev_set_promiscuity(struct net_device
*dev
, int inc
);
2695 extern int dev_set_allmulti(struct net_device
*dev
, int inc
);
2696 extern void netdev_state_change(struct net_device
*dev
);
2697 extern void netdev_notify_peers(struct net_device
*dev
);
2698 extern void netdev_features_change(struct net_device
*dev
);
2699 /* Load a device via the kmod */
2700 extern void dev_load(struct net
*net
, const char *name
);
2701 extern struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
2702 struct rtnl_link_stats64
*storage
);
2703 extern void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
2704 const struct net_device_stats
*netdev_stats
);
2706 extern int netdev_max_backlog
;
2707 extern int netdev_tstamp_prequeue
;
2708 extern int weight_p
;
2709 extern int bpf_jit_enable
;
2711 extern bool netdev_has_upper_dev(struct net_device
*dev
,
2712 struct net_device
*upper_dev
);
2713 extern bool netdev_has_any_upper_dev(struct net_device
*dev
);
2714 extern struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
2715 extern struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
2716 extern int netdev_upper_dev_link(struct net_device
*dev
,
2717 struct net_device
*upper_dev
);
2718 extern int netdev_master_upper_dev_link(struct net_device
*dev
,
2719 struct net_device
*upper_dev
);
2720 extern void netdev_upper_dev_unlink(struct net_device
*dev
,
2721 struct net_device
*upper_dev
);
2722 extern int skb_checksum_help(struct sk_buff
*skb
);
2723 extern struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
2724 netdev_features_t features
, bool tx_path
);
2725 extern struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
2726 netdev_features_t features
);
2729 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
2731 return __skb_gso_segment(skb
, features
, true);
2733 __be16
skb_network_protocol(struct sk_buff
*skb
);
2735 static inline bool can_checksum_protocol(netdev_features_t features
,
2738 return ((features
& NETIF_F_GEN_CSUM
) ||
2739 ((features
& NETIF_F_V4_CSUM
) &&
2740 protocol
== htons(ETH_P_IP
)) ||
2741 ((features
& NETIF_F_V6_CSUM
) &&
2742 protocol
== htons(ETH_P_IPV6
)) ||
2743 ((features
& NETIF_F_FCOE_CRC
) &&
2744 protocol
== htons(ETH_P_FCOE
)));
2748 extern void netdev_rx_csum_fault(struct net_device
*dev
);
2750 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
2754 /* rx skb timestamps */
2755 extern void net_enable_timestamp(void);
2756 extern void net_disable_timestamp(void);
2758 #ifdef CONFIG_PROC_FS
2759 extern int __init
dev_proc_init(void);
2761 #define dev_proc_init() 0
2764 extern int netdev_class_create_file(struct class_attribute
*class_attr
);
2765 extern void netdev_class_remove_file(struct class_attribute
*class_attr
);
2767 extern struct kobj_ns_type_operations net_ns_type_operations
;
2769 extern const char *netdev_drivername(const struct net_device
*dev
);
2771 extern void linkwatch_run_queue(void);
2773 static inline netdev_features_t
netdev_get_wanted_features(
2774 struct net_device
*dev
)
2776 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
2778 netdev_features_t
netdev_increment_features(netdev_features_t all
,
2779 netdev_features_t one
, netdev_features_t mask
);
2781 /* Allow TSO being used on stacked device :
2782 * Performing the GSO segmentation before last device
2783 * is a performance improvement.
2785 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
2786 netdev_features_t mask
)
2788 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
2791 int __netdev_update_features(struct net_device
*dev
);
2792 void netdev_update_features(struct net_device
*dev
);
2793 void netdev_change_features(struct net_device
*dev
);
2795 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
2796 struct net_device
*dev
);
2798 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
2800 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
2802 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
2804 /* check flags correspondence */
2805 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
2806 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
2807 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
2808 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
2809 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
2810 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
2812 return (features
& feature
) == feature
;
2815 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
2817 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
2818 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
2821 static inline bool netif_needs_gso(struct sk_buff
*skb
,
2822 netdev_features_t features
)
2824 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
2825 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
2826 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
2829 static inline void netif_set_gso_max_size(struct net_device
*dev
,
2832 dev
->gso_max_size
= size
;
2835 static inline bool netif_is_bond_master(struct net_device
*dev
)
2837 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
2840 static inline bool netif_is_bond_slave(struct net_device
*dev
)
2842 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
2845 static inline bool netif_supports_nofcs(struct net_device
*dev
)
2847 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
2850 extern struct pernet_operations __net_initdata loopback_net_ops
;
2852 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2854 /* netdev_printk helpers, similar to dev_printk */
2856 static inline const char *netdev_name(const struct net_device
*dev
)
2858 if (dev
->reg_state
!= NETREG_REGISTERED
)
2859 return "(unregistered net_device)";
2863 extern __printf(3, 4)
2864 int netdev_printk(const char *level
, const struct net_device
*dev
,
2865 const char *format
, ...);
2866 extern __printf(2, 3)
2867 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
2868 extern __printf(2, 3)
2869 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
2870 extern __printf(2, 3)
2871 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
2872 extern __printf(2, 3)
2873 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
2874 extern __printf(2, 3)
2875 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
2876 extern __printf(2, 3)
2877 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
2878 extern __printf(2, 3)
2879 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
2881 #define MODULE_ALIAS_NETDEV(device) \
2882 MODULE_ALIAS("netdev-" device)
2884 #if defined(CONFIG_DYNAMIC_DEBUG)
2885 #define netdev_dbg(__dev, format, args...) \
2887 dynamic_netdev_dbg(__dev, format, ##args); \
2889 #elif defined(DEBUG)
2890 #define netdev_dbg(__dev, format, args...) \
2891 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2893 #define netdev_dbg(__dev, format, args...) \
2896 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2901 #if defined(VERBOSE_DEBUG)
2902 #define netdev_vdbg netdev_dbg
2905 #define netdev_vdbg(dev, format, args...) \
2908 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2914 * netdev_WARN() acts like dev_printk(), but with the key difference
2915 * of using a WARN/WARN_ON to get the message out, including the
2916 * file/line information and a backtrace.
2918 #define netdev_WARN(dev, format, args...) \
2919 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2921 /* netif printk helpers, similar to netdev_printk */
2923 #define netif_printk(priv, type, level, dev, fmt, args...) \
2925 if (netif_msg_##type(priv)) \
2926 netdev_printk(level, (dev), fmt, ##args); \
2929 #define netif_level(level, priv, type, dev, fmt, args...) \
2931 if (netif_msg_##type(priv)) \
2932 netdev_##level(dev, fmt, ##args); \
2935 #define netif_emerg(priv, type, dev, fmt, args...) \
2936 netif_level(emerg, priv, type, dev, fmt, ##args)
2937 #define netif_alert(priv, type, dev, fmt, args...) \
2938 netif_level(alert, priv, type, dev, fmt, ##args)
2939 #define netif_crit(priv, type, dev, fmt, args...) \
2940 netif_level(crit, priv, type, dev, fmt, ##args)
2941 #define netif_err(priv, type, dev, fmt, args...) \
2942 netif_level(err, priv, type, dev, fmt, ##args)
2943 #define netif_warn(priv, type, dev, fmt, args...) \
2944 netif_level(warn, priv, type, dev, fmt, ##args)
2945 #define netif_notice(priv, type, dev, fmt, args...) \
2946 netif_level(notice, priv, type, dev, fmt, ##args)
2947 #define netif_info(priv, type, dev, fmt, args...) \
2948 netif_level(info, priv, type, dev, fmt, ##args)
2950 #if defined(CONFIG_DYNAMIC_DEBUG)
2951 #define netif_dbg(priv, type, netdev, format, args...) \
2953 if (netif_msg_##type(priv)) \
2954 dynamic_netdev_dbg(netdev, format, ##args); \
2956 #elif defined(DEBUG)
2957 #define netif_dbg(priv, type, dev, format, args...) \
2958 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2960 #define netif_dbg(priv, type, dev, format, args...) \
2963 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2968 #if defined(VERBOSE_DEBUG)
2969 #define netif_vdbg netif_dbg
2971 #define netif_vdbg(priv, type, dev, format, args...) \
2974 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2980 * The list of packet types we will receive (as opposed to discard)
2981 * and the routines to invoke.
2983 * Why 16. Because with 16 the only overlap we get on a hash of the
2984 * low nibble of the protocol value is RARP/SNAP/X.25.
2986 * NOTE: That is no longer true with the addition of VLAN tags. Not
2987 * sure which should go first, but I bet it won't make much
2988 * difference if we are running VLANs. The good news is that
2989 * this protocol won't be in the list unless compiled in, so
2990 * the average user (w/out VLANs) will not be adversely affected.
3006 #define PTYPE_HASH_SIZE (16)
3007 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3009 #endif /* _LINUX_NETDEVICE_H */