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>
60 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
61 const struct ethtool_ops
*ops
);
63 /* Backlog congestion levels */
64 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
65 #define NET_RX_DROP 1 /* packet dropped */
68 * Transmit return codes: transmit return codes originate from three different
71 * - qdisc return codes
72 * - driver transmit return codes
75 * Drivers are allowed to return any one of those in their hard_start_xmit()
76 * function. Real network devices commonly used with qdiscs should only return
77 * the driver transmit return codes though - when qdiscs are used, the actual
78 * transmission happens asynchronously, so the value is not propagated to
79 * higher layers. Virtual network devices transmit synchronously, in this case
80 * the driver transmit return codes are consumed by dev_queue_xmit(), all
81 * others are propagated to higher layers.
84 /* qdisc ->enqueue() return codes. */
85 #define NET_XMIT_SUCCESS 0x00
86 #define NET_XMIT_DROP 0x01 /* skb dropped */
87 #define NET_XMIT_CN 0x02 /* congestion notification */
88 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
89 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
91 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
92 * indicates that the device will soon be dropping packets, or already drops
93 * some packets of the same priority; prompting us to send less aggressively. */
94 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
95 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
97 /* Driver transmit return codes */
98 #define NETDEV_TX_MASK 0xf0
101 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
102 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
103 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
104 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
106 typedef enum netdev_tx netdev_tx_t
;
109 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
110 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
112 static inline bool dev_xmit_complete(int rc
)
115 * Positive cases with an skb consumed by a driver:
116 * - successful transmission (rc == NETDEV_TX_OK)
117 * - error while transmitting (rc < 0)
118 * - error while queueing to a different device (rc & NET_XMIT_MASK)
120 if (likely(rc
< NET_XMIT_MASK
))
127 * Compute the worst case header length according to the protocols
131 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
132 # if defined(CONFIG_MAC80211_MESH)
133 # define LL_MAX_HEADER 128
135 # define LL_MAX_HEADER 96
138 # define LL_MAX_HEADER 32
141 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
142 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
143 #define MAX_HEADER LL_MAX_HEADER
145 #define MAX_HEADER (LL_MAX_HEADER + 48)
149 * Old network device statistics. Fields are native words
150 * (unsigned long) so they can be read and written atomically.
153 struct net_device_stats
{
154 unsigned long rx_packets
;
155 unsigned long tx_packets
;
156 unsigned long rx_bytes
;
157 unsigned long tx_bytes
;
158 unsigned long rx_errors
;
159 unsigned long tx_errors
;
160 unsigned long rx_dropped
;
161 unsigned long tx_dropped
;
162 unsigned long multicast
;
163 unsigned long collisions
;
164 unsigned long rx_length_errors
;
165 unsigned long rx_over_errors
;
166 unsigned long rx_crc_errors
;
167 unsigned long rx_frame_errors
;
168 unsigned long rx_fifo_errors
;
169 unsigned long rx_missed_errors
;
170 unsigned long tx_aborted_errors
;
171 unsigned long tx_carrier_errors
;
172 unsigned long tx_fifo_errors
;
173 unsigned long tx_heartbeat_errors
;
174 unsigned long tx_window_errors
;
175 unsigned long rx_compressed
;
176 unsigned long tx_compressed
;
180 #include <linux/cache.h>
181 #include <linux/skbuff.h>
184 #include <linux/static_key.h>
185 extern struct static_key rps_needed
;
192 struct netdev_hw_addr
{
193 struct list_head list
;
194 unsigned char addr
[MAX_ADDR_LEN
];
196 #define NETDEV_HW_ADDR_T_LAN 1
197 #define NETDEV_HW_ADDR_T_SAN 2
198 #define NETDEV_HW_ADDR_T_SLAVE 3
199 #define NETDEV_HW_ADDR_T_UNICAST 4
200 #define NETDEV_HW_ADDR_T_MULTICAST 5
205 struct rcu_head rcu_head
;
208 struct netdev_hw_addr_list
{
209 struct list_head list
;
213 #define netdev_hw_addr_list_count(l) ((l)->count)
214 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
215 #define netdev_hw_addr_list_for_each(ha, l) \
216 list_for_each_entry(ha, &(l)->list, list)
218 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
219 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
220 #define netdev_for_each_uc_addr(ha, dev) \
221 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
223 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
224 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
225 #define netdev_for_each_mc_addr(ha, dev) \
226 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
233 /* cached hardware header; allow for machine alignment needs. */
234 #define HH_DATA_MOD 16
235 #define HH_DATA_OFF(__len) \
236 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
237 #define HH_DATA_ALIGN(__len) \
238 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
239 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
242 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
244 * dev->hard_header_len ? (dev->hard_header_len +
245 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
247 * We could use other alignment values, but we must maintain the
248 * relationship HH alignment <= LL alignment.
250 #define LL_RESERVED_SPACE(dev) \
251 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
252 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
253 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
256 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
257 unsigned short type
, const void *daddr
,
258 const void *saddr
, unsigned int len
);
259 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
260 int (*rebuild
)(struct sk_buff
*skb
);
261 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
262 void (*cache_update
)(struct hh_cache
*hh
,
263 const struct net_device
*dev
,
264 const unsigned char *haddr
);
267 /* These flag bits are private to the generic network queueing
268 * layer, they may not be explicitly referenced by any other
272 enum netdev_state_t
{
274 __LINK_STATE_PRESENT
,
275 __LINK_STATE_NOCARRIER
,
276 __LINK_STATE_LINKWATCH_PENDING
,
277 __LINK_STATE_DORMANT
,
282 * This structure holds at boot time configured netdevice settings. They
283 * are then used in the device probing.
285 struct netdev_boot_setup
{
289 #define NETDEV_BOOT_SETUP_MAX 8
291 int __init
netdev_boot_setup(char *str
);
294 * Structure for NAPI scheduling similar to tasklet but with weighting
297 /* The poll_list must only be managed by the entity which
298 * changes the state of the NAPI_STATE_SCHED bit. This means
299 * whoever atomically sets that bit can add this napi_struct
300 * to the per-cpu poll_list, and whoever clears that bit
301 * can remove from the list right before clearing the bit.
303 struct list_head poll_list
;
307 unsigned int gro_count
;
308 int (*poll
)(struct napi_struct
*, int);
309 #ifdef CONFIG_NETPOLL
310 spinlock_t poll_lock
;
313 struct net_device
*dev
;
314 struct sk_buff
*gro_list
;
316 struct list_head dev_list
;
317 struct hlist_node napi_hash_node
;
318 unsigned int napi_id
;
322 NAPI_STATE_SCHED
, /* Poll is scheduled */
323 NAPI_STATE_DISABLE
, /* Disable pending */
324 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
325 NAPI_STATE_HASHED
, /* In NAPI hash */
335 typedef enum gro_result gro_result_t
;
338 * enum rx_handler_result - Possible return values for rx_handlers.
339 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
341 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
342 * case skb->dev was changed by rx_handler.
343 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
344 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
346 * rx_handlers are functions called from inside __netif_receive_skb(), to do
347 * special processing of the skb, prior to delivery to protocol handlers.
349 * Currently, a net_device can only have a single rx_handler registered. Trying
350 * to register a second rx_handler will return -EBUSY.
352 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
353 * To unregister a rx_handler on a net_device, use
354 * netdev_rx_handler_unregister().
356 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
359 * If the rx_handler consumed to skb in some way, it should return
360 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
361 * the skb to be delivered in some other ways.
363 * If the rx_handler changed skb->dev, to divert the skb to another
364 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
365 * new device will be called if it exists.
367 * If the rx_handler consider the skb should be ignored, it should return
368 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
369 * are registered on exact device (ptype->dev == skb->dev).
371 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
372 * delivered, it should return RX_HANDLER_PASS.
374 * A device without a registered rx_handler will behave as if rx_handler
375 * returned RX_HANDLER_PASS.
378 enum rx_handler_result
{
384 typedef enum rx_handler_result rx_handler_result_t
;
385 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
387 void __napi_schedule(struct napi_struct
*n
);
389 static inline bool napi_disable_pending(struct napi_struct
*n
)
391 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
395 * napi_schedule_prep - check if napi can be scheduled
398 * Test if NAPI routine is already running, and if not mark
399 * it as running. This is used as a condition variable
400 * insure only one NAPI poll instance runs. We also make
401 * sure there is no pending NAPI disable.
403 static inline bool napi_schedule_prep(struct napi_struct
*n
)
405 return !napi_disable_pending(n
) &&
406 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
410 * napi_schedule - schedule NAPI poll
413 * Schedule NAPI poll routine to be called if it is not already
416 static inline void napi_schedule(struct napi_struct
*n
)
418 if (napi_schedule_prep(n
))
422 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
423 static inline bool napi_reschedule(struct napi_struct
*napi
)
425 if (napi_schedule_prep(napi
)) {
426 __napi_schedule(napi
);
433 * napi_complete - NAPI processing complete
436 * Mark NAPI processing as complete.
438 void __napi_complete(struct napi_struct
*n
);
439 void napi_complete(struct napi_struct
*n
);
442 * napi_by_id - lookup a NAPI by napi_id
443 * @napi_id: hashed napi_id
445 * lookup @napi_id in napi_hash table
446 * must be called under rcu_read_lock()
448 struct napi_struct
*napi_by_id(unsigned int napi_id
);
451 * napi_hash_add - add a NAPI to global hashtable
452 * @napi: napi context
454 * generate a new napi_id and store a @napi under it in napi_hash
456 void napi_hash_add(struct napi_struct
*napi
);
459 * napi_hash_del - remove a NAPI from global table
460 * @napi: napi context
462 * Warning: caller must observe rcu grace period
463 * before freeing memory containing @napi
465 void napi_hash_del(struct napi_struct
*napi
);
468 * napi_disable - prevent NAPI from scheduling
471 * Stop NAPI from being scheduled on this context.
472 * Waits till any outstanding processing completes.
474 static inline void napi_disable(struct napi_struct
*n
)
477 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
478 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
480 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
484 * napi_enable - enable NAPI scheduling
487 * Resume NAPI from being scheduled on this context.
488 * Must be paired with napi_disable.
490 static inline void napi_enable(struct napi_struct
*n
)
492 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
493 smp_mb__before_atomic();
494 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
499 * napi_synchronize - wait until NAPI is not running
502 * Wait until NAPI is done being scheduled on this context.
503 * Waits till any outstanding processing completes but
504 * does not disable future activations.
506 static inline void napi_synchronize(const struct napi_struct
*n
)
508 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
512 # define napi_synchronize(n) barrier()
515 enum netdev_queue_state_t
{
516 __QUEUE_STATE_DRV_XOFF
,
517 __QUEUE_STATE_STACK_XOFF
,
518 __QUEUE_STATE_FROZEN
,
521 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
522 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
523 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
525 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
526 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
528 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
532 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
533 * netif_tx_* functions below are used to manipulate this flag. The
534 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
535 * queue independently. The netif_xmit_*stopped functions below are called
536 * to check if the queue has been stopped by the driver or stack (either
537 * of the XOFF bits are set in the state). Drivers should not need to call
538 * netif_xmit*stopped functions, they should only be using netif_tx_*.
541 struct netdev_queue
{
545 struct net_device
*dev
;
547 struct Qdisc
*qdisc_sleeping
;
551 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
557 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
560 * please use this field instead of dev->trans_start
562 unsigned long trans_start
;
565 * Number of TX timeouts for this queue
566 * (/sys/class/net/DEV/Q/trans_timeout)
568 unsigned long trans_timeout
;
575 } ____cacheline_aligned_in_smp
;
577 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
579 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
586 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
588 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
595 * This structure holds an RPS map which can be of variable length. The
596 * map is an array of CPUs.
603 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
606 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
607 * tail pointer for that CPU's input queue at the time of last enqueue, and
608 * a hardware filter index.
610 struct rps_dev_flow
{
613 unsigned int last_qtail
;
615 #define RPS_NO_FILTER 0xffff
618 * The rps_dev_flow_table structure contains a table of flow mappings.
620 struct rps_dev_flow_table
{
623 struct rps_dev_flow flows
[0];
625 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
626 ((_num) * sizeof(struct rps_dev_flow)))
629 * The rps_sock_flow_table contains mappings of flows to the last CPU
630 * on which they were processed by the application (set in recvmsg).
632 struct rps_sock_flow_table
{
636 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
637 ((_num) * sizeof(u16)))
639 #define RPS_NO_CPU 0xffff
641 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
645 unsigned int cpu
, index
= hash
& table
->mask
;
647 /* We only give a hint, preemption can change cpu under us */
648 cpu
= raw_smp_processor_id();
650 if (table
->ents
[index
] != cpu
)
651 table
->ents
[index
] = cpu
;
655 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
659 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
662 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
664 #ifdef CONFIG_RFS_ACCEL
665 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
668 #endif /* CONFIG_RPS */
670 /* This structure contains an instance of an RX queue. */
671 struct netdev_rx_queue
{
673 struct rps_map __rcu
*rps_map
;
674 struct rps_dev_flow_table __rcu
*rps_flow_table
;
677 struct net_device
*dev
;
678 } ____cacheline_aligned_in_smp
;
681 * RX queue sysfs structures and functions.
683 struct rx_queue_attribute
{
684 struct attribute attr
;
685 ssize_t (*show
)(struct netdev_rx_queue
*queue
,
686 struct rx_queue_attribute
*attr
, char *buf
);
687 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
688 struct rx_queue_attribute
*attr
, const char *buf
, size_t len
);
693 * This structure holds an XPS map which can be of variable length. The
694 * map is an array of queues.
698 unsigned int alloc_len
;
702 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
703 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
707 * This structure holds all XPS maps for device. Maps are indexed by CPU.
709 struct xps_dev_maps
{
711 struct xps_map __rcu
*cpu_map
[0];
713 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
714 (nr_cpu_ids * sizeof(struct xps_map *)))
715 #endif /* CONFIG_XPS */
717 #define TC_MAX_QUEUE 16
718 #define TC_BITMASK 15
719 /* HW offloaded queuing disciplines txq count and offset maps */
720 struct netdev_tc_txq
{
725 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
727 * This structure is to hold information about the device
728 * configured to run FCoE protocol stack.
730 struct netdev_fcoe_hbainfo
{
731 char manufacturer
[64];
732 char serial_number
[64];
733 char hardware_version
[64];
734 char driver_version
[64];
735 char optionrom_version
[64];
736 char firmware_version
[64];
738 char model_description
[256];
742 #define MAX_PHYS_PORT_ID_LEN 32
744 /* This structure holds a unique identifier to identify the
745 * physical port used by a netdevice.
747 struct netdev_phys_port_id
{
748 unsigned char id
[MAX_PHYS_PORT_ID_LEN
];
749 unsigned char id_len
;
752 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
753 struct sk_buff
*skb
);
756 * This structure defines the management hooks for network devices.
757 * The following hooks can be defined; unless noted otherwise, they are
758 * optional and can be filled with a null pointer.
760 * int (*ndo_init)(struct net_device *dev);
761 * This function is called once when network device is registered.
762 * The network device can use this to any late stage initializaton
763 * or semantic validattion. It can fail with an error code which will
764 * be propogated back to register_netdev
766 * void (*ndo_uninit)(struct net_device *dev);
767 * This function is called when device is unregistered or when registration
768 * fails. It is not called if init fails.
770 * int (*ndo_open)(struct net_device *dev);
771 * This function is called when network device transistions to the up
774 * int (*ndo_stop)(struct net_device *dev);
775 * This function is called when network device transistions to the down
778 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
779 * struct net_device *dev);
780 * Called when a packet needs to be transmitted.
781 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
782 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
783 * Required can not be NULL.
785 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
786 * void *accel_priv, select_queue_fallback_t fallback);
787 * Called to decide which queue to when device supports multiple
790 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
791 * This function is called to allow device receiver to make
792 * changes to configuration when multicast or promiscious is enabled.
794 * void (*ndo_set_rx_mode)(struct net_device *dev);
795 * This function is called device changes address list filtering.
796 * If driver handles unicast address filtering, it should set
797 * IFF_UNICAST_FLT to its priv_flags.
799 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
800 * This function is called when the Media Access Control address
801 * needs to be changed. If this interface is not defined, the
802 * mac address can not be changed.
804 * int (*ndo_validate_addr)(struct net_device *dev);
805 * Test if Media Access Control address is valid for the device.
807 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
808 * Called when a user request an ioctl which can't be handled by
809 * the generic interface code. If not defined ioctl's return
810 * not supported error code.
812 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
813 * Used to set network devices bus interface parameters. This interface
814 * is retained for legacy reason, new devices should use the bus
815 * interface (PCI) for low level management.
817 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
818 * Called when a user wants to change the Maximum Transfer Unit
819 * of a device. If not defined, any request to change MTU will
820 * will return an error.
822 * void (*ndo_tx_timeout)(struct net_device *dev);
823 * Callback uses when the transmitter has not made any progress
824 * for dev->watchdog ticks.
826 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
827 * struct rtnl_link_stats64 *storage);
828 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
829 * Called when a user wants to get the network device usage
830 * statistics. Drivers must do one of the following:
831 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
832 * rtnl_link_stats64 structure passed by the caller.
833 * 2. Define @ndo_get_stats to update a net_device_stats structure
834 * (which should normally be dev->stats) and return a pointer to
835 * it. The structure may be changed asynchronously only if each
836 * field is written atomically.
837 * 3. Update dev->stats asynchronously and atomically, and define
840 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
841 * If device support VLAN filtering this function is called when a
842 * VLAN id is registered.
844 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
845 * If device support VLAN filtering this function is called when a
846 * VLAN id is unregistered.
848 * void (*ndo_poll_controller)(struct net_device *dev);
850 * SR-IOV management functions.
851 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
852 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
853 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
855 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
856 * int (*ndo_get_vf_config)(struct net_device *dev,
857 * int vf, struct ifla_vf_info *ivf);
858 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
859 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
860 * struct nlattr *port[]);
861 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
862 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
863 * Called to setup 'tc' number of traffic classes in the net device. This
864 * is always called from the stack with the rtnl lock held and netif tx
865 * queues stopped. This allows the netdevice to perform queue management
868 * Fiber Channel over Ethernet (FCoE) offload functions.
869 * int (*ndo_fcoe_enable)(struct net_device *dev);
870 * Called when the FCoE protocol stack wants to start using LLD for FCoE
871 * so the underlying device can perform whatever needed configuration or
872 * initialization to support acceleration of FCoE traffic.
874 * int (*ndo_fcoe_disable)(struct net_device *dev);
875 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
876 * so the underlying device can perform whatever needed clean-ups to
877 * stop supporting acceleration of FCoE traffic.
879 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
880 * struct scatterlist *sgl, unsigned int sgc);
881 * Called when the FCoE Initiator wants to initialize an I/O that
882 * is a possible candidate for Direct Data Placement (DDP). The LLD can
883 * perform necessary setup and returns 1 to indicate the device is set up
884 * successfully to perform DDP on this I/O, otherwise this returns 0.
886 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
887 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
888 * indicated by the FC exchange id 'xid', so the underlying device can
889 * clean up and reuse resources for later DDP requests.
891 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
892 * struct scatterlist *sgl, unsigned int sgc);
893 * Called when the FCoE Target wants to initialize an I/O that
894 * is a possible candidate for Direct Data Placement (DDP). The LLD can
895 * perform necessary setup and returns 1 to indicate the device is set up
896 * successfully to perform DDP on this I/O, otherwise this returns 0.
898 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
899 * struct netdev_fcoe_hbainfo *hbainfo);
900 * Called when the FCoE Protocol stack wants information on the underlying
901 * device. This information is utilized by the FCoE protocol stack to
902 * register attributes with Fiber Channel management service as per the
903 * FC-GS Fabric Device Management Information(FDMI) specification.
905 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
906 * Called when the underlying device wants to override default World Wide
907 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
908 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
909 * protocol stack to use.
912 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
913 * u16 rxq_index, u32 flow_id);
914 * Set hardware filter for RFS. rxq_index is the target queue index;
915 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
916 * Return the filter ID on success, or a negative error code.
918 * Slave management functions (for bridge, bonding, etc).
919 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
920 * Called to make another netdev an underling.
922 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
923 * Called to release previously enslaved netdev.
925 * Feature/offload setting functions.
926 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
927 * netdev_features_t features);
928 * Adjusts the requested feature flags according to device-specific
929 * constraints, and returns the resulting flags. Must not modify
932 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
933 * Called to update device configuration to new features. Passed
934 * feature set might be less than what was returned by ndo_fix_features()).
935 * Must return >0 or -errno if it changed dev->features itself.
937 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
938 * struct net_device *dev,
939 * const unsigned char *addr, u16 flags)
940 * Adds an FDB entry to dev for addr.
941 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
942 * struct net_device *dev,
943 * const unsigned char *addr)
944 * Deletes the FDB entry from dev coresponding to addr.
945 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
946 * struct net_device *dev, struct net_device *filter_dev,
948 * Used to add FDB entries to dump requests. Implementers should add
949 * entries to skb and update idx with the number of entries.
951 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
952 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
953 * struct net_device *dev, u32 filter_mask)
955 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
956 * Called to change device carrier. Soft-devices (like dummy, team, etc)
957 * which do not represent real hardware may define this to allow their
958 * userspace components to manage their virtual carrier state. Devices
959 * that determine carrier state from physical hardware properties (eg
960 * network cables) or protocol-dependent mechanisms (eg
961 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
963 * int (*ndo_get_phys_port_id)(struct net_device *dev,
964 * struct netdev_phys_port_id *ppid);
965 * Called to get ID of physical port of this device. If driver does
966 * not implement this, it is assumed that the hw is not able to have
967 * multiple net devices on single physical port.
969 * void (*ndo_add_vxlan_port)(struct net_device *dev,
970 * sa_family_t sa_family, __be16 port);
971 * Called by vxlan to notiy a driver about the UDP port and socket
972 * address family that vxlan is listnening to. It is called only when
973 * a new port starts listening. The operation is protected by the
974 * vxlan_net->sock_lock.
976 * void (*ndo_del_vxlan_port)(struct net_device *dev,
977 * sa_family_t sa_family, __be16 port);
978 * Called by vxlan to notify the driver about a UDP port and socket
979 * address family that vxlan is not listening to anymore. The operation
980 * is protected by the vxlan_net->sock_lock.
982 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
983 * struct net_device *dev)
984 * Called by upper layer devices to accelerate switching or other
985 * station functionality into hardware. 'pdev is the lowerdev
986 * to use for the offload and 'dev' is the net device that will
987 * back the offload. Returns a pointer to the private structure
988 * the upper layer will maintain.
989 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
990 * Called by upper layer device to delete the station created
991 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
992 * the station and priv is the structure returned by the add
994 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
995 * struct net_device *dev,
997 * Callback to use for xmit over the accelerated station. This
998 * is used in place of ndo_start_xmit on accelerated net
1001 struct net_device_ops
{
1002 int (*ndo_init
)(struct net_device
*dev
);
1003 void (*ndo_uninit
)(struct net_device
*dev
);
1004 int (*ndo_open
)(struct net_device
*dev
);
1005 int (*ndo_stop
)(struct net_device
*dev
);
1006 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
1007 struct net_device
*dev
);
1008 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1009 struct sk_buff
*skb
,
1011 select_queue_fallback_t fallback
);
1012 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1014 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1015 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1017 int (*ndo_validate_addr
)(struct net_device
*dev
);
1018 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1019 struct ifreq
*ifr
, int cmd
);
1020 int (*ndo_set_config
)(struct net_device
*dev
,
1022 int (*ndo_change_mtu
)(struct net_device
*dev
,
1024 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1025 struct neigh_parms
*);
1026 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1028 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
1029 struct rtnl_link_stats64
*storage
);
1030 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1032 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1033 __be16 proto
, u16 vid
);
1034 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1035 __be16 proto
, u16 vid
);
1036 #ifdef CONFIG_NET_POLL_CONTROLLER
1037 void (*ndo_poll_controller
)(struct net_device
*dev
);
1038 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1039 struct netpoll_info
*info
);
1040 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1042 #ifdef CONFIG_NET_RX_BUSY_POLL
1043 int (*ndo_busy_poll
)(struct napi_struct
*dev
);
1045 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1046 int queue
, u8
*mac
);
1047 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1048 int queue
, u16 vlan
, u8 qos
);
1049 int (*ndo_set_vf_rate
)(struct net_device
*dev
,
1050 int vf
, int min_tx_rate
,
1052 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1053 int vf
, bool setting
);
1054 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1056 struct ifla_vf_info
*ivf
);
1057 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1058 int vf
, int link_state
);
1059 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1061 struct nlattr
*port
[]);
1062 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1063 int vf
, struct sk_buff
*skb
);
1064 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
1065 #if IS_ENABLED(CONFIG_FCOE)
1066 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1067 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1068 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1070 struct scatterlist
*sgl
,
1072 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1074 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1076 struct scatterlist
*sgl
,
1078 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1079 struct netdev_fcoe_hbainfo
*hbainfo
);
1082 #if IS_ENABLED(CONFIG_LIBFCOE)
1083 #define NETDEV_FCOE_WWNN 0
1084 #define NETDEV_FCOE_WWPN 1
1085 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1086 u64
*wwn
, int type
);
1089 #ifdef CONFIG_RFS_ACCEL
1090 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1091 const struct sk_buff
*skb
,
1095 int (*ndo_add_slave
)(struct net_device
*dev
,
1096 struct net_device
*slave_dev
);
1097 int (*ndo_del_slave
)(struct net_device
*dev
,
1098 struct net_device
*slave_dev
);
1099 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1100 netdev_features_t features
);
1101 int (*ndo_set_features
)(struct net_device
*dev
,
1102 netdev_features_t features
);
1103 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1104 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1106 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1107 struct nlattr
*tb
[],
1108 struct net_device
*dev
,
1109 const unsigned char *addr
,
1111 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1112 struct nlattr
*tb
[],
1113 struct net_device
*dev
,
1114 const unsigned char *addr
);
1115 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1116 struct netlink_callback
*cb
,
1117 struct net_device
*dev
,
1118 struct net_device
*filter_dev
,
1121 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1122 struct nlmsghdr
*nlh
);
1123 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1125 struct net_device
*dev
,
1127 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1128 struct nlmsghdr
*nlh
);
1129 int (*ndo_change_carrier
)(struct net_device
*dev
,
1131 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1132 struct netdev_phys_port_id
*ppid
);
1133 void (*ndo_add_vxlan_port
)(struct net_device
*dev
,
1134 sa_family_t sa_family
,
1136 void (*ndo_del_vxlan_port
)(struct net_device
*dev
,
1137 sa_family_t sa_family
,
1140 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1141 struct net_device
*dev
);
1142 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1145 netdev_tx_t (*ndo_dfwd_start_xmit
) (struct sk_buff
*skb
,
1146 struct net_device
*dev
,
1148 int (*ndo_get_lock_subclass
)(struct net_device
*dev
);
1152 * enum net_device_priv_flags - &struct net_device priv_flags
1154 * These are the &struct net_device, they are only set internally
1155 * by drivers and used in the kernel. These flags are invisible to
1156 * userspace, this means that the order of these flags can change
1157 * during any kernel release.
1159 * You should have a pretty good reason to be extending these flags.
1161 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1162 * @IFF_EBRIDGE: Ethernet bridging device
1163 * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active
1164 * @IFF_MASTER_8023AD: bonding master, 802.3ad
1165 * @IFF_MASTER_ALB: bonding master, balance-alb
1166 * @IFF_BONDING: bonding master or slave
1167 * @IFF_SLAVE_NEEDARP: need ARPs for validation
1168 * @IFF_ISATAP: ISATAP interface (RFC4214)
1169 * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
1170 * @IFF_WAN_HDLC: WAN HDLC device
1171 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1173 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1174 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1175 * @IFF_MACVLAN_PORT: device used as macvlan port
1176 * @IFF_BRIDGE_PORT: device used as bridge port
1177 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1178 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1179 * @IFF_UNICAST_FLT: Supports unicast filtering
1180 * @IFF_TEAM_PORT: device used as team port
1181 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1182 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1183 * change when it's running
1184 * @IFF_MACVLAN: Macvlan device
1186 enum netdev_priv_flags
{
1187 IFF_802_1Q_VLAN
= 1<<0,
1189 IFF_SLAVE_INACTIVE
= 1<<2,
1190 IFF_MASTER_8023AD
= 1<<3,
1191 IFF_MASTER_ALB
= 1<<4,
1193 IFF_SLAVE_NEEDARP
= 1<<6,
1195 IFF_MASTER_ARPMON
= 1<<8,
1196 IFF_WAN_HDLC
= 1<<9,
1197 IFF_XMIT_DST_RELEASE
= 1<<10,
1198 IFF_DONT_BRIDGE
= 1<<11,
1199 IFF_DISABLE_NETPOLL
= 1<<12,
1200 IFF_MACVLAN_PORT
= 1<<13,
1201 IFF_BRIDGE_PORT
= 1<<14,
1202 IFF_OVS_DATAPATH
= 1<<15,
1203 IFF_TX_SKB_SHARING
= 1<<16,
1204 IFF_UNICAST_FLT
= 1<<17,
1205 IFF_TEAM_PORT
= 1<<18,
1206 IFF_SUPP_NOFCS
= 1<<19,
1207 IFF_LIVE_ADDR_CHANGE
= 1<<20,
1208 IFF_MACVLAN
= 1<<21,
1211 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1212 #define IFF_EBRIDGE IFF_EBRIDGE
1213 #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE
1214 #define IFF_MASTER_8023AD IFF_MASTER_8023AD
1215 #define IFF_MASTER_ALB IFF_MASTER_ALB
1216 #define IFF_BONDING IFF_BONDING
1217 #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP
1218 #define IFF_ISATAP IFF_ISATAP
1219 #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON
1220 #define IFF_WAN_HDLC IFF_WAN_HDLC
1221 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1222 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1223 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1224 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1225 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1226 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1227 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1228 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1229 #define IFF_TEAM_PORT IFF_TEAM_PORT
1230 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1231 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1232 #define IFF_MACVLAN IFF_MACVLAN
1235 * The DEVICE structure.
1236 * Actually, this whole structure is a big mistake. It mixes I/O
1237 * data with strictly "high-level" data, and it has to know about
1238 * almost every data structure used in the INET module.
1240 * FIXME: cleanup struct net_device such that network protocol info
1247 * This is the first field of the "visible" part of this structure
1248 * (i.e. as seen by users in the "Space.c" file). It is the name
1251 char name
[IFNAMSIZ
];
1253 /* device name hash chain, please keep it close to name[] */
1254 struct hlist_node name_hlist
;
1260 * I/O specific fields
1261 * FIXME: Merge these and struct ifmap into one
1263 unsigned long mem_end
; /* shared mem end */
1264 unsigned long mem_start
; /* shared mem start */
1265 unsigned long base_addr
; /* device I/O address */
1266 int irq
; /* device IRQ number */
1269 * Some hardware also needs these fields, but they are not
1270 * part of the usual set specified in Space.c.
1273 unsigned long state
;
1275 struct list_head dev_list
;
1276 struct list_head napi_list
;
1277 struct list_head unreg_list
;
1278 struct list_head close_list
;
1280 /* directly linked devices, like slaves for bonding */
1282 struct list_head upper
;
1283 struct list_head lower
;
1286 /* all linked devices, *including* neighbours */
1288 struct list_head upper
;
1289 struct list_head lower
;
1293 /* currently active device features */
1294 netdev_features_t features
;
1295 /* user-changeable features */
1296 netdev_features_t hw_features
;
1297 /* user-requested features */
1298 netdev_features_t wanted_features
;
1299 /* mask of features inheritable by VLAN devices */
1300 netdev_features_t vlan_features
;
1301 /* mask of features inherited by encapsulating devices
1302 * This field indicates what encapsulation offloads
1303 * the hardware is capable of doing, and drivers will
1304 * need to set them appropriately.
1306 netdev_features_t hw_enc_features
;
1307 /* mask of fetures inheritable by MPLS */
1308 netdev_features_t mpls_features
;
1310 /* Interface index. Unique device identifier */
1314 struct net_device_stats stats
;
1316 /* dropped packets by core network, Do not use this in drivers */
1317 atomic_long_t rx_dropped
;
1318 atomic_long_t tx_dropped
;
1320 /* Stats to monitor carrier on<->off transitions */
1321 atomic_t carrier_changes
;
1323 #ifdef CONFIG_WIRELESS_EXT
1324 /* List of functions to handle Wireless Extensions (instead of ioctl).
1325 * See <net/iw_handler.h> for details. Jean II */
1326 const struct iw_handler_def
* wireless_handlers
;
1327 /* Instance data managed by the core of Wireless Extensions. */
1328 struct iw_public_data
* wireless_data
;
1330 /* Management operations */
1331 const struct net_device_ops
*netdev_ops
;
1332 const struct ethtool_ops
*ethtool_ops
;
1333 const struct forwarding_accel_ops
*fwd_ops
;
1335 /* Hardware header description */
1336 const struct header_ops
*header_ops
;
1338 unsigned int flags
; /* interface flags (a la BSD) */
1339 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1340 * See if.h for definitions. */
1341 unsigned short gflags
;
1342 unsigned short padded
; /* How much padding added by alloc_netdev() */
1344 unsigned char operstate
; /* RFC2863 operstate */
1345 unsigned char link_mode
; /* mapping policy to operstate */
1347 unsigned char if_port
; /* Selectable AUI, TP,..*/
1348 unsigned char dma
; /* DMA channel */
1350 unsigned int mtu
; /* interface MTU value */
1351 unsigned short type
; /* interface hardware type */
1352 unsigned short hard_header_len
; /* hardware hdr length */
1354 /* extra head- and tailroom the hardware may need, but not in all cases
1355 * can this be guaranteed, especially tailroom. Some cases also use
1356 * LL_MAX_HEADER instead to allocate the skb.
1358 unsigned short needed_headroom
;
1359 unsigned short needed_tailroom
;
1361 /* Interface address info. */
1362 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1363 unsigned char addr_assign_type
; /* hw address assignment type */
1364 unsigned char addr_len
; /* hardware address length */
1365 unsigned short neigh_priv_len
;
1366 unsigned short dev_id
; /* Used to differentiate devices
1367 * that share the same link
1370 unsigned short dev_port
; /* Used to differentiate
1371 * devices that share the same
1374 spinlock_t addr_list_lock
;
1375 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1376 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1377 struct netdev_hw_addr_list dev_addrs
; /* list of device
1381 struct kset
*queues_kset
;
1385 unsigned int promiscuity
;
1386 unsigned int allmulti
;
1389 /* Protocol specific pointers */
1391 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1392 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1394 #if IS_ENABLED(CONFIG_NET_DSA)
1395 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1397 #if IS_ENABLED(CONFIG_TIPC)
1398 struct tipc_bearer __rcu
*tipc_ptr
; /* TIPC specific data */
1400 void *atalk_ptr
; /* AppleTalk link */
1401 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1402 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1403 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1404 void *ax25_ptr
; /* AX.25 specific data */
1405 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1406 assign before registering */
1409 * Cache lines mostly used on receive path (including eth_type_trans())
1411 unsigned long last_rx
; /* Time of last Rx */
1413 /* Interface address info used in eth_type_trans() */
1414 unsigned char *dev_addr
; /* hw address, (before bcast
1415 because most packets are
1420 struct netdev_rx_queue
*_rx
;
1422 /* Number of RX queues allocated at register_netdev() time */
1423 unsigned int num_rx_queues
;
1425 /* Number of RX queues currently active in device */
1426 unsigned int real_num_rx_queues
;
1430 rx_handler_func_t __rcu
*rx_handler
;
1431 void __rcu
*rx_handler_data
;
1433 struct netdev_queue __rcu
*ingress_queue
;
1434 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1438 * Cache lines mostly used on transmit path
1440 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1442 /* Number of TX queues allocated at alloc_netdev_mq() time */
1443 unsigned int num_tx_queues
;
1445 /* Number of TX queues currently active in device */
1446 unsigned int real_num_tx_queues
;
1448 /* root qdisc from userspace point of view */
1449 struct Qdisc
*qdisc
;
1451 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1452 spinlock_t tx_global_lock
;
1455 struct xps_dev_maps __rcu
*xps_maps
;
1457 #ifdef CONFIG_RFS_ACCEL
1458 /* CPU reverse-mapping for RX completion interrupts, indexed
1459 * by RX queue number. Assigned by driver. This must only be
1460 * set if the ndo_rx_flow_steer operation is defined. */
1461 struct cpu_rmap
*rx_cpu_rmap
;
1464 /* These may be needed for future network-power-down code. */
1467 * trans_start here is expensive for high speed devices on SMP,
1468 * please use netdev_queue->trans_start instead.
1470 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1472 int watchdog_timeo
; /* used by dev_watchdog() */
1473 struct timer_list watchdog_timer
;
1475 /* Number of references to this device */
1476 int __percpu
*pcpu_refcnt
;
1478 /* delayed register/unregister */
1479 struct list_head todo_list
;
1480 /* device index hash chain */
1481 struct hlist_node index_hlist
;
1483 struct list_head link_watch_list
;
1485 /* register/unregister state machine */
1486 enum { NETREG_UNINITIALIZED
=0,
1487 NETREG_REGISTERED
, /* completed register_netdevice */
1488 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1489 NETREG_UNREGISTERED
, /* completed unregister todo */
1490 NETREG_RELEASED
, /* called free_netdev */
1491 NETREG_DUMMY
, /* dummy device for NAPI poll */
1494 bool dismantle
; /* device is going do be freed */
1497 RTNL_LINK_INITIALIZED
,
1498 RTNL_LINK_INITIALIZING
,
1499 } rtnl_link_state
:16;
1501 /* Called from unregister, can be used to call free_netdev */
1502 void (*destructor
)(struct net_device
*dev
);
1504 #ifdef CONFIG_NETPOLL
1505 struct netpoll_info __rcu
*npinfo
;
1508 #ifdef CONFIG_NET_NS
1509 /* Network namespace this network device is inside */
1513 /* mid-layer private */
1516 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1517 struct pcpu_sw_netstats __percpu
*tstats
;
1518 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1519 struct pcpu_vstats __percpu
*vstats
; /* veth stats */
1522 struct garp_port __rcu
*garp_port
;
1524 struct mrp_port __rcu
*mrp_port
;
1526 /* class/net/name entry */
1528 /* space for optional device, statistics, and wireless sysfs groups */
1529 const struct attribute_group
*sysfs_groups
[4];
1530 /* space for optional per-rx queue attributes */
1531 const struct attribute_group
*sysfs_rx_queue_group
;
1533 /* rtnetlink link ops */
1534 const struct rtnl_link_ops
*rtnl_link_ops
;
1536 /* for setting kernel sock attribute on TCP connection setup */
1537 #define GSO_MAX_SIZE 65536
1538 unsigned int gso_max_size
;
1539 #define GSO_MAX_SEGS 65535
1543 /* Data Center Bridging netlink ops */
1544 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1547 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1548 u8 prio_tc_map
[TC_BITMASK
+ 1];
1550 #if IS_ENABLED(CONFIG_FCOE)
1551 /* max exchange id for FCoE LRO by ddp */
1552 unsigned int fcoe_ddp_xid
;
1554 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1555 struct netprio_map __rcu
*priomap
;
1557 /* phy device may attach itself for hardware timestamping */
1558 struct phy_device
*phydev
;
1560 struct lock_class_key
*qdisc_tx_busylock
;
1562 /* group the device belongs to */
1565 struct pm_qos_request pm_qos_req
;
1567 #define to_net_dev(d) container_of(d, struct net_device, dev)
1569 #define NETDEV_ALIGN 32
1572 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1574 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1578 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1580 if (tc
>= dev
->num_tc
)
1583 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1588 void netdev_reset_tc(struct net_device
*dev
)
1591 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1592 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1596 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1598 if (tc
>= dev
->num_tc
)
1601 dev
->tc_to_txq
[tc
].count
= count
;
1602 dev
->tc_to_txq
[tc
].offset
= offset
;
1607 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1609 if (num_tc
> TC_MAX_QUEUE
)
1612 dev
->num_tc
= num_tc
;
1617 int netdev_get_num_tc(struct net_device
*dev
)
1623 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1626 return &dev
->_tx
[index
];
1629 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1630 void (*f
)(struct net_device
*,
1631 struct netdev_queue
*,
1637 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1638 f(dev
, &dev
->_tx
[i
], arg
);
1641 struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1642 struct sk_buff
*skb
,
1646 * Net namespace inlines
1649 struct net
*dev_net(const struct net_device
*dev
)
1651 return read_pnet(&dev
->nd_net
);
1655 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1657 #ifdef CONFIG_NET_NS
1658 release_net(dev
->nd_net
);
1659 dev
->nd_net
= hold_net(net
);
1663 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1665 #ifdef CONFIG_NET_DSA_TAG_DSA
1666 if (dev
->dsa_ptr
!= NULL
)
1667 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1673 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1675 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1676 if (dev
->dsa_ptr
!= NULL
)
1677 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1684 * netdev_priv - access network device private data
1685 * @dev: network device
1687 * Get network device private data
1689 static inline void *netdev_priv(const struct net_device
*dev
)
1691 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1694 /* Set the sysfs physical device reference for the network logical device
1695 * if set prior to registration will cause a symlink during initialization.
1697 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1699 /* Set the sysfs device type for the network logical device to allow
1700 * fine-grained identification of different network device types. For
1701 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1703 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1705 /* Default NAPI poll() weight
1706 * Device drivers are strongly advised to not use bigger value
1708 #define NAPI_POLL_WEIGHT 64
1711 * netif_napi_add - initialize a napi context
1712 * @dev: network device
1713 * @napi: napi context
1714 * @poll: polling function
1715 * @weight: default weight
1717 * netif_napi_add() must be used to initialize a napi context prior to calling
1718 * *any* of the other napi related functions.
1720 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1721 int (*poll
)(struct napi_struct
*, int), int weight
);
1724 * netif_napi_del - remove a napi context
1725 * @napi: napi context
1727 * netif_napi_del() removes a napi context from the network device napi list
1729 void netif_napi_del(struct napi_struct
*napi
);
1731 struct napi_gro_cb
{
1732 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1735 /* Length of frag0. */
1736 unsigned int frag0_len
;
1738 /* This indicates where we are processing relative to skb->data. */
1741 /* This is non-zero if the packet cannot be merged with the new skb. */
1744 /* Save the IP ID here and check when we get to the transport layer */
1747 /* Number of segments aggregated. */
1750 /* This is non-zero if the packet may be of the same flow. */
1755 #define NAPI_GRO_FREE 1
1756 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1758 /* jiffies when first packet was created/queued */
1761 /* Used in ipv6_gro_receive() */
1764 /* Used in udp_gro_receive */
1767 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
1770 /* used in skb_gro_receive() slow path */
1771 struct sk_buff
*last
;
1774 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1776 struct packet_type
{
1777 __be16 type
; /* This is really htons(ether_type). */
1778 struct net_device
*dev
; /* NULL is wildcarded here */
1779 int (*func
) (struct sk_buff
*,
1780 struct net_device
*,
1781 struct packet_type
*,
1782 struct net_device
*);
1783 bool (*id_match
)(struct packet_type
*ptype
,
1785 void *af_packet_priv
;
1786 struct list_head list
;
1789 struct offload_callbacks
{
1790 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1791 netdev_features_t features
);
1792 int (*gso_send_check
)(struct sk_buff
*skb
);
1793 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1794 struct sk_buff
*skb
);
1795 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
1798 struct packet_offload
{
1799 __be16 type
; /* This is really htons(ether_type). */
1800 struct offload_callbacks callbacks
;
1801 struct list_head list
;
1804 struct udp_offload
{
1806 struct offload_callbacks callbacks
;
1809 /* often modified stats are per cpu, other are shared (netdev->stats) */
1810 struct pcpu_sw_netstats
{
1815 struct u64_stats_sync syncp
;
1818 #define netdev_alloc_pcpu_stats(type) \
1820 typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
1823 for_each_possible_cpu(i) { \
1824 typeof(type) *stat; \
1825 stat = per_cpu_ptr(pcpu_stats, i); \
1826 u64_stats_init(&stat->syncp); \
1832 #include <linux/notifier.h>
1834 /* netdevice notifier chain. Please remember to update the rtnetlink
1835 * notification exclusion list in rtnetlink_event() when adding new
1838 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1839 #define NETDEV_DOWN 0x0002
1840 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1841 detected a hardware crash and restarted
1842 - we can use this eg to kick tcp sessions
1844 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1845 #define NETDEV_REGISTER 0x0005
1846 #define NETDEV_UNREGISTER 0x0006
1847 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
1848 #define NETDEV_CHANGEADDR 0x0008
1849 #define NETDEV_GOING_DOWN 0x0009
1850 #define NETDEV_CHANGENAME 0x000A
1851 #define NETDEV_FEAT_CHANGE 0x000B
1852 #define NETDEV_BONDING_FAILOVER 0x000C
1853 #define NETDEV_PRE_UP 0x000D
1854 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1855 #define NETDEV_POST_TYPE_CHANGE 0x000F
1856 #define NETDEV_POST_INIT 0x0010
1857 #define NETDEV_UNREGISTER_FINAL 0x0011
1858 #define NETDEV_RELEASE 0x0012
1859 #define NETDEV_NOTIFY_PEERS 0x0013
1860 #define NETDEV_JOIN 0x0014
1861 #define NETDEV_CHANGEUPPER 0x0015
1862 #define NETDEV_RESEND_IGMP 0x0016
1863 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
1865 int register_netdevice_notifier(struct notifier_block
*nb
);
1866 int unregister_netdevice_notifier(struct notifier_block
*nb
);
1868 struct netdev_notifier_info
{
1869 struct net_device
*dev
;
1872 struct netdev_notifier_change_info
{
1873 struct netdev_notifier_info info
; /* must be first */
1874 unsigned int flags_changed
;
1877 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
1878 struct net_device
*dev
)
1883 static inline struct net_device
*
1884 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
1889 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1892 extern rwlock_t dev_base_lock
; /* Device list lock */
1894 #define for_each_netdev(net, d) \
1895 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1896 #define for_each_netdev_reverse(net, d) \
1897 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1898 #define for_each_netdev_rcu(net, d) \
1899 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1900 #define for_each_netdev_safe(net, d, n) \
1901 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1902 #define for_each_netdev_continue(net, d) \
1903 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1904 #define for_each_netdev_continue_rcu(net, d) \
1905 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1906 #define for_each_netdev_in_bond_rcu(bond, slave) \
1907 for_each_netdev_rcu(&init_net, slave) \
1908 if (netdev_master_upper_dev_get_rcu(slave) == bond)
1909 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1911 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1913 struct list_head
*lh
;
1917 lh
= dev
->dev_list
.next
;
1918 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1921 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1923 struct list_head
*lh
;
1927 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1928 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1931 static inline struct net_device
*first_net_device(struct net
*net
)
1933 return list_empty(&net
->dev_base_head
) ? NULL
:
1934 net_device_entry(net
->dev_base_head
.next
);
1937 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1939 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1941 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1944 int netdev_boot_setup_check(struct net_device
*dev
);
1945 unsigned long netdev_boot_base(const char *prefix
, int unit
);
1946 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1947 const char *hwaddr
);
1948 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1949 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1950 void dev_add_pack(struct packet_type
*pt
);
1951 void dev_remove_pack(struct packet_type
*pt
);
1952 void __dev_remove_pack(struct packet_type
*pt
);
1953 void dev_add_offload(struct packet_offload
*po
);
1954 void dev_remove_offload(struct packet_offload
*po
);
1956 struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1957 unsigned short mask
);
1958 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1959 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1960 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1961 int dev_alloc_name(struct net_device
*dev
, const char *name
);
1962 int dev_open(struct net_device
*dev
);
1963 int dev_close(struct net_device
*dev
);
1964 void dev_disable_lro(struct net_device
*dev
);
1965 int dev_loopback_xmit(struct sk_buff
*newskb
);
1966 int dev_queue_xmit(struct sk_buff
*skb
);
1967 int dev_queue_xmit_accel(struct sk_buff
*skb
, void *accel_priv
);
1968 int register_netdevice(struct net_device
*dev
);
1969 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
1970 void unregister_netdevice_many(struct list_head
*head
);
1971 static inline void unregister_netdevice(struct net_device
*dev
)
1973 unregister_netdevice_queue(dev
, NULL
);
1976 int netdev_refcnt_read(const struct net_device
*dev
);
1977 void free_netdev(struct net_device
*dev
);
1978 void netdev_freemem(struct net_device
*dev
);
1979 void synchronize_net(void);
1980 int init_dummy_netdev(struct net_device
*dev
);
1982 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1983 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1984 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1985 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
1986 int dev_restart(struct net_device
*dev
);
1987 int skb_gro_receive(struct sk_buff
**head
, struct sk_buff
*skb
);
1989 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1991 return NAPI_GRO_CB(skb
)->data_offset
;
1994 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1996 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1999 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
2001 NAPI_GRO_CB(skb
)->data_offset
+= len
;
2004 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
2005 unsigned int offset
)
2007 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
2010 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2012 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2015 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2016 unsigned int offset
)
2018 if (!pskb_may_pull(skb
, hlen
))
2021 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2022 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2023 return skb
->data
+ offset
;
2026 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2028 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2029 skb_network_offset(skb
);
2032 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2033 const void *start
, unsigned int len
)
2035 if (skb
->ip_summed
== CHECKSUM_COMPLETE
)
2036 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2037 csum_partial(start
, len
, 0));
2040 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2041 unsigned short type
,
2042 const void *daddr
, const void *saddr
,
2045 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2048 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2051 static inline int dev_parse_header(const struct sk_buff
*skb
,
2052 unsigned char *haddr
)
2054 const struct net_device
*dev
= skb
->dev
;
2056 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2058 return dev
->header_ops
->parse(skb
, haddr
);
2061 static inline int dev_rebuild_header(struct sk_buff
*skb
)
2063 const struct net_device
*dev
= skb
->dev
;
2065 if (!dev
->header_ops
|| !dev
->header_ops
->rebuild
)
2067 return dev
->header_ops
->rebuild(skb
);
2070 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
2071 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2072 static inline int unregister_gifconf(unsigned int family
)
2074 return register_gifconf(family
, NULL
);
2077 #ifdef CONFIG_NET_FLOW_LIMIT
2078 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2079 struct sd_flow_limit
{
2081 unsigned int num_buckets
;
2082 unsigned int history_head
;
2083 u16 history
[FLOW_LIMIT_HISTORY
];
2087 extern int netdev_flow_limit_table_len
;
2088 #endif /* CONFIG_NET_FLOW_LIMIT */
2091 * Incoming packets are placed on per-cpu queues
2093 struct softnet_data
{
2094 struct Qdisc
*output_queue
;
2095 struct Qdisc
**output_queue_tailp
;
2096 struct list_head poll_list
;
2097 struct sk_buff
*completion_queue
;
2098 struct sk_buff_head process_queue
;
2101 unsigned int processed
;
2102 unsigned int time_squeeze
;
2103 unsigned int cpu_collision
;
2104 unsigned int received_rps
;
2107 struct softnet_data
*rps_ipi_list
;
2109 /* Elements below can be accessed between CPUs for RPS */
2110 struct call_single_data csd ____cacheline_aligned_in_smp
;
2111 struct softnet_data
*rps_ipi_next
;
2113 unsigned int input_queue_head
;
2114 unsigned int input_queue_tail
;
2116 unsigned int dropped
;
2117 struct sk_buff_head input_pkt_queue
;
2118 struct napi_struct backlog
;
2120 #ifdef CONFIG_NET_FLOW_LIMIT
2121 struct sd_flow_limit __rcu
*flow_limit
;
2125 static inline void input_queue_head_incr(struct softnet_data
*sd
)
2128 sd
->input_queue_head
++;
2132 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
2133 unsigned int *qtail
)
2136 *qtail
= ++sd
->input_queue_tail
;
2140 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
2142 void __netif_schedule(struct Qdisc
*q
);
2144 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
2146 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
2147 __netif_schedule(txq
->qdisc
);
2150 static inline void netif_tx_schedule_all(struct net_device
*dev
)
2154 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2155 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
2158 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
2160 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2164 * netif_start_queue - allow transmit
2165 * @dev: network device
2167 * Allow upper layers to call the device hard_start_xmit routine.
2169 static inline void netif_start_queue(struct net_device
*dev
)
2171 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
2174 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
2178 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2179 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2180 netif_tx_start_queue(txq
);
2184 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
2186 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
2187 __netif_schedule(dev_queue
->qdisc
);
2191 * netif_wake_queue - restart transmit
2192 * @dev: network device
2194 * Allow upper layers to call the device hard_start_xmit routine.
2195 * Used for flow control when transmit resources are available.
2197 static inline void netif_wake_queue(struct net_device
*dev
)
2199 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
2202 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
2206 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2207 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2208 netif_tx_wake_queue(txq
);
2212 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
2214 if (WARN_ON(!dev_queue
)) {
2215 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
2218 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2222 * netif_stop_queue - stop transmitted packets
2223 * @dev: network device
2225 * Stop upper layers calling the device hard_start_xmit routine.
2226 * Used for flow control when transmit resources are unavailable.
2228 static inline void netif_stop_queue(struct net_device
*dev
)
2230 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2233 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
2237 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2238 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2239 netif_tx_stop_queue(txq
);
2243 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2245 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2249 * netif_queue_stopped - test if transmit queue is flowblocked
2250 * @dev: network device
2252 * Test if transmit queue on device is currently unable to send.
2254 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2256 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2259 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2261 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2265 netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2267 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2271 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue
*dev_queue
)
2273 return dev_queue
->state
& QUEUE_STATE_DRV_XOFF_OR_FROZEN
;
2276 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2280 dql_queued(&dev_queue
->dql
, bytes
);
2282 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2285 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2288 * The XOFF flag must be set before checking the dql_avail below,
2289 * because in netdev_tx_completed_queue we update the dql_completed
2290 * before checking the XOFF flag.
2294 /* check again in case another CPU has just made room avail */
2295 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2296 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2301 * netdev_sent_queue - report the number of bytes queued to hardware
2302 * @dev: network device
2303 * @bytes: number of bytes queued to the hardware device queue
2305 * Report the number of bytes queued for sending/completion to the network
2306 * device hardware queue. @bytes should be a good approximation and should
2307 * exactly match netdev_completed_queue() @bytes
2309 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2311 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2314 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2315 unsigned int pkts
, unsigned int bytes
)
2318 if (unlikely(!bytes
))
2321 dql_completed(&dev_queue
->dql
, bytes
);
2324 * Without the memory barrier there is a small possiblity that
2325 * netdev_tx_sent_queue will miss the update and cause the queue to
2326 * be stopped forever
2330 if (dql_avail(&dev_queue
->dql
) < 0)
2333 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2334 netif_schedule_queue(dev_queue
);
2339 * netdev_completed_queue - report bytes and packets completed by device
2340 * @dev: network device
2341 * @pkts: actual number of packets sent over the medium
2342 * @bytes: actual number of bytes sent over the medium
2344 * Report the number of bytes and packets transmitted by the network device
2345 * hardware queue over the physical medium, @bytes must exactly match the
2346 * @bytes amount passed to netdev_sent_queue()
2348 static inline void netdev_completed_queue(struct net_device
*dev
,
2349 unsigned int pkts
, unsigned int bytes
)
2351 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2354 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2357 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2363 * netdev_reset_queue - reset the packets and bytes count of a network device
2364 * @dev_queue: network device
2366 * Reset the bytes and packet count of a network device and clear the
2367 * software flow control OFF bit for this network device
2369 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2371 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2375 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2376 * @dev: network device
2377 * @queue_index: given tx queue index
2379 * Returns 0 if given tx queue index >= number of device tx queues,
2380 * otherwise returns the originally passed tx queue index.
2382 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
2384 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
2385 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2386 dev
->name
, queue_index
,
2387 dev
->real_num_tx_queues
);
2395 * netif_running - test if up
2396 * @dev: network device
2398 * Test if the device has been brought up.
2400 static inline bool netif_running(const struct net_device
*dev
)
2402 return test_bit(__LINK_STATE_START
, &dev
->state
);
2406 * Routines to manage the subqueues on a device. We only need start
2407 * stop, and a check if it's stopped. All other device management is
2408 * done at the overall netdevice level.
2409 * Also test the device if we're multiqueue.
2413 * netif_start_subqueue - allow sending packets on subqueue
2414 * @dev: network device
2415 * @queue_index: sub queue index
2417 * Start individual transmit queue of a device with multiple transmit queues.
2419 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2421 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2423 netif_tx_start_queue(txq
);
2427 * netif_stop_subqueue - stop sending packets on subqueue
2428 * @dev: network device
2429 * @queue_index: sub queue index
2431 * Stop individual transmit queue of a device with multiple transmit queues.
2433 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2435 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2436 netif_tx_stop_queue(txq
);
2440 * netif_subqueue_stopped - test status of subqueue
2441 * @dev: network device
2442 * @queue_index: sub queue index
2444 * Check individual transmit queue of a device with multiple transmit queues.
2446 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2449 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2451 return netif_tx_queue_stopped(txq
);
2454 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2455 struct sk_buff
*skb
)
2457 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2461 * netif_wake_subqueue - allow sending packets on subqueue
2462 * @dev: network device
2463 * @queue_index: sub queue index
2465 * Resume individual transmit queue of a device with multiple transmit queues.
2467 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2469 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2470 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2471 __netif_schedule(txq
->qdisc
);
2475 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
2478 static inline int netif_set_xps_queue(struct net_device
*dev
,
2479 const struct cpumask
*mask
,
2487 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2488 * as a distribution range limit for the returned value.
2490 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2491 struct sk_buff
*skb
)
2493 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2497 * netif_is_multiqueue - test if device has multiple transmit queues
2498 * @dev: network device
2500 * Check if device has multiple transmit queues
2502 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2504 return dev
->num_tx_queues
> 1;
2507 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
2510 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
2512 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2519 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2520 const struct net_device
*from_dev
)
2524 err
= netif_set_real_num_tx_queues(to_dev
,
2525 from_dev
->real_num_tx_queues
);
2529 return netif_set_real_num_rx_queues(to_dev
,
2530 from_dev
->real_num_rx_queues
);
2537 static inline unsigned int get_netdev_rx_queue_index(
2538 struct netdev_rx_queue
*queue
)
2540 struct net_device
*dev
= queue
->dev
;
2541 int index
= queue
- dev
->_rx
;
2543 BUG_ON(index
>= dev
->num_rx_queues
);
2548 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2549 int netif_get_num_default_rss_queues(void);
2551 enum skb_free_reason
{
2552 SKB_REASON_CONSUMED
,
2556 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
2557 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
2560 * It is not allowed to call kfree_skb() or consume_skb() from hardware
2561 * interrupt context or with hardware interrupts being disabled.
2562 * (in_irq() || irqs_disabled())
2564 * We provide four helpers that can be used in following contexts :
2566 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
2567 * replacing kfree_skb(skb)
2569 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
2570 * Typically used in place of consume_skb(skb) in TX completion path
2572 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
2573 * replacing kfree_skb(skb)
2575 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
2576 * and consumed a packet. Used in place of consume_skb(skb)
2578 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
2580 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
2583 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
2585 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
2588 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
2590 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
2593 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
2595 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
2598 int netif_rx(struct sk_buff
*skb
);
2599 int netif_rx_ni(struct sk_buff
*skb
);
2600 int netif_receive_skb(struct sk_buff
*skb
);
2601 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
2602 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2603 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
2604 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2605 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
2606 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
2608 static inline void napi_free_frags(struct napi_struct
*napi
)
2610 kfree_skb(napi
->skb
);
2614 int netdev_rx_handler_register(struct net_device
*dev
,
2615 rx_handler_func_t
*rx_handler
,
2616 void *rx_handler_data
);
2617 void netdev_rx_handler_unregister(struct net_device
*dev
);
2619 bool dev_valid_name(const char *name
);
2620 int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2621 int dev_ethtool(struct net
*net
, struct ifreq
*);
2622 unsigned int dev_get_flags(const struct net_device
*);
2623 int __dev_change_flags(struct net_device
*, unsigned int flags
);
2624 int dev_change_flags(struct net_device
*, unsigned int);
2625 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
2626 unsigned int gchanges
);
2627 int dev_change_name(struct net_device
*, const char *);
2628 int dev_set_alias(struct net_device
*, const char *, size_t);
2629 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
2630 int dev_set_mtu(struct net_device
*, int);
2631 void dev_set_group(struct net_device
*, int);
2632 int dev_set_mac_address(struct net_device
*, struct sockaddr
*);
2633 int dev_change_carrier(struct net_device
*, bool new_carrier
);
2634 int dev_get_phys_port_id(struct net_device
*dev
,
2635 struct netdev_phys_port_id
*ppid
);
2636 int dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
2637 struct netdev_queue
*txq
);
2638 int __dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
2639 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
2640 bool is_skb_forwardable(struct net_device
*dev
, struct sk_buff
*skb
);
2642 extern int netdev_budget
;
2644 /* Called by rtnetlink.c:rtnl_unlock() */
2645 void netdev_run_todo(void);
2648 * dev_put - release reference to device
2649 * @dev: network device
2651 * Release reference to device to allow it to be freed.
2653 static inline void dev_put(struct net_device
*dev
)
2655 this_cpu_dec(*dev
->pcpu_refcnt
);
2659 * dev_hold - get reference to device
2660 * @dev: network device
2662 * Hold reference to device to keep it from being freed.
2664 static inline void dev_hold(struct net_device
*dev
)
2666 this_cpu_inc(*dev
->pcpu_refcnt
);
2669 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2670 * and _off may be called from IRQ context, but it is caller
2671 * who is responsible for serialization of these calls.
2673 * The name carrier is inappropriate, these functions should really be
2674 * called netif_lowerlayer_*() because they represent the state of any
2675 * kind of lower layer not just hardware media.
2678 void linkwatch_init_dev(struct net_device
*dev
);
2679 void linkwatch_fire_event(struct net_device
*dev
);
2680 void linkwatch_forget_dev(struct net_device
*dev
);
2683 * netif_carrier_ok - test if carrier present
2684 * @dev: network device
2686 * Check if carrier is present on device
2688 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2690 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2693 unsigned long dev_trans_start(struct net_device
*dev
);
2695 void __netdev_watchdog_up(struct net_device
*dev
);
2697 void netif_carrier_on(struct net_device
*dev
);
2699 void netif_carrier_off(struct net_device
*dev
);
2702 * netif_dormant_on - mark device as dormant.
2703 * @dev: network device
2705 * Mark device as dormant (as per RFC2863).
2707 * The dormant state indicates that the relevant interface is not
2708 * actually in a condition to pass packets (i.e., it is not 'up') but is
2709 * in a "pending" state, waiting for some external event. For "on-
2710 * demand" interfaces, this new state identifies the situation where the
2711 * interface is waiting for events to place it in the up state.
2714 static inline void netif_dormant_on(struct net_device
*dev
)
2716 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2717 linkwatch_fire_event(dev
);
2721 * netif_dormant_off - set device as not dormant.
2722 * @dev: network device
2724 * Device is not in dormant state.
2726 static inline void netif_dormant_off(struct net_device
*dev
)
2728 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2729 linkwatch_fire_event(dev
);
2733 * netif_dormant - test if carrier present
2734 * @dev: network device
2736 * Check if carrier is present on device
2738 static inline bool netif_dormant(const struct net_device
*dev
)
2740 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2745 * netif_oper_up - test if device is operational
2746 * @dev: network device
2748 * Check if carrier is operational
2750 static inline bool netif_oper_up(const struct net_device
*dev
)
2752 return (dev
->operstate
== IF_OPER_UP
||
2753 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2757 * netif_device_present - is device available or removed
2758 * @dev: network device
2760 * Check if device has not been removed from system.
2762 static inline bool netif_device_present(struct net_device
*dev
)
2764 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2767 void netif_device_detach(struct net_device
*dev
);
2769 void netif_device_attach(struct net_device
*dev
);
2772 * Network interface message level settings
2776 NETIF_MSG_DRV
= 0x0001,
2777 NETIF_MSG_PROBE
= 0x0002,
2778 NETIF_MSG_LINK
= 0x0004,
2779 NETIF_MSG_TIMER
= 0x0008,
2780 NETIF_MSG_IFDOWN
= 0x0010,
2781 NETIF_MSG_IFUP
= 0x0020,
2782 NETIF_MSG_RX_ERR
= 0x0040,
2783 NETIF_MSG_TX_ERR
= 0x0080,
2784 NETIF_MSG_TX_QUEUED
= 0x0100,
2785 NETIF_MSG_INTR
= 0x0200,
2786 NETIF_MSG_TX_DONE
= 0x0400,
2787 NETIF_MSG_RX_STATUS
= 0x0800,
2788 NETIF_MSG_PKTDATA
= 0x1000,
2789 NETIF_MSG_HW
= 0x2000,
2790 NETIF_MSG_WOL
= 0x4000,
2793 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2794 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2795 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2796 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2797 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2798 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2799 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2800 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2801 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2802 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2803 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2804 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2805 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2806 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2807 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2809 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2812 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2813 return default_msg_enable_bits
;
2814 if (debug_value
== 0) /* no output */
2816 /* set low N bits */
2817 return (1 << debug_value
) - 1;
2820 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2822 spin_lock(&txq
->_xmit_lock
);
2823 txq
->xmit_lock_owner
= cpu
;
2826 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2828 spin_lock_bh(&txq
->_xmit_lock
);
2829 txq
->xmit_lock_owner
= smp_processor_id();
2832 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2834 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2836 txq
->xmit_lock_owner
= smp_processor_id();
2840 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2842 txq
->xmit_lock_owner
= -1;
2843 spin_unlock(&txq
->_xmit_lock
);
2846 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2848 txq
->xmit_lock_owner
= -1;
2849 spin_unlock_bh(&txq
->_xmit_lock
);
2852 static inline void txq_trans_update(struct netdev_queue
*txq
)
2854 if (txq
->xmit_lock_owner
!= -1)
2855 txq
->trans_start
= jiffies
;
2859 * netif_tx_lock - grab network device transmit lock
2860 * @dev: network device
2862 * Get network device transmit lock
2864 static inline void netif_tx_lock(struct net_device
*dev
)
2869 spin_lock(&dev
->tx_global_lock
);
2870 cpu
= smp_processor_id();
2871 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2872 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2874 /* We are the only thread of execution doing a
2875 * freeze, but we have to grab the _xmit_lock in
2876 * order to synchronize with threads which are in
2877 * the ->hard_start_xmit() handler and already
2878 * checked the frozen bit.
2880 __netif_tx_lock(txq
, cpu
);
2881 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2882 __netif_tx_unlock(txq
);
2886 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2892 static inline void netif_tx_unlock(struct net_device
*dev
)
2896 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2897 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2899 /* No need to grab the _xmit_lock here. If the
2900 * queue is not stopped for another reason, we
2903 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2904 netif_schedule_queue(txq
);
2906 spin_unlock(&dev
->tx_global_lock
);
2909 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2911 netif_tx_unlock(dev
);
2915 #define HARD_TX_LOCK(dev, txq, cpu) { \
2916 if ((dev->features & NETIF_F_LLTX) == 0) { \
2917 __netif_tx_lock(txq, cpu); \
2921 #define HARD_TX_TRYLOCK(dev, txq) \
2922 (((dev->features & NETIF_F_LLTX) == 0) ? \
2923 __netif_tx_trylock(txq) : \
2926 #define HARD_TX_UNLOCK(dev, txq) { \
2927 if ((dev->features & NETIF_F_LLTX) == 0) { \
2928 __netif_tx_unlock(txq); \
2932 static inline void netif_tx_disable(struct net_device
*dev
)
2938 cpu
= smp_processor_id();
2939 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2940 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2942 __netif_tx_lock(txq
, cpu
);
2943 netif_tx_stop_queue(txq
);
2944 __netif_tx_unlock(txq
);
2949 static inline void netif_addr_lock(struct net_device
*dev
)
2951 spin_lock(&dev
->addr_list_lock
);
2954 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2956 int subclass
= SINGLE_DEPTH_NESTING
;
2958 if (dev
->netdev_ops
->ndo_get_lock_subclass
)
2959 subclass
= dev
->netdev_ops
->ndo_get_lock_subclass(dev
);
2961 spin_lock_nested(&dev
->addr_list_lock
, subclass
);
2964 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2966 spin_lock_bh(&dev
->addr_list_lock
);
2969 static inline void netif_addr_unlock(struct net_device
*dev
)
2971 spin_unlock(&dev
->addr_list_lock
);
2974 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2976 spin_unlock_bh(&dev
->addr_list_lock
);
2980 * dev_addrs walker. Should be used only for read access. Call with
2981 * rcu_read_lock held.
2983 #define for_each_dev_addr(dev, ha) \
2984 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2986 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2988 void ether_setup(struct net_device
*dev
);
2990 /* Support for loadable net-drivers */
2991 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2992 void (*setup
)(struct net_device
*),
2993 unsigned int txqs
, unsigned int rxqs
);
2994 #define alloc_netdev(sizeof_priv, name, setup) \
2995 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2997 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2998 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
3000 int register_netdev(struct net_device
*dev
);
3001 void unregister_netdev(struct net_device
*dev
);
3003 /* General hardware address lists handling functions */
3004 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
3005 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3006 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
3007 struct netdev_hw_addr_list
*from_list
, int addr_len
);
3008 int __hw_addr_sync_dev(struct netdev_hw_addr_list
*list
,
3009 struct net_device
*dev
,
3010 int (*sync
)(struct net_device
*, const unsigned char *),
3011 int (*unsync
)(struct net_device
*,
3012 const unsigned char *));
3013 void __hw_addr_unsync_dev(struct netdev_hw_addr_list
*list
,
3014 struct net_device
*dev
,
3015 int (*unsync
)(struct net_device
*,
3016 const unsigned char *));
3017 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
3019 /* Functions used for device addresses handling */
3020 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
3021 unsigned char addr_type
);
3022 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
3023 unsigned char addr_type
);
3024 void dev_addr_flush(struct net_device
*dev
);
3025 int dev_addr_init(struct net_device
*dev
);
3027 /* Functions used for unicast addresses handling */
3028 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
3029 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3030 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
3031 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
3032 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3033 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
3034 void dev_uc_flush(struct net_device
*dev
);
3035 void dev_uc_init(struct net_device
*dev
);
3038 * __dev_uc_sync - Synchonize device's unicast list
3039 * @dev: device to sync
3040 * @sync: function to call if address should be added
3041 * @unsync: function to call if address should be removed
3043 * Add newly added addresses to the interface, and release
3044 * addresses that have been deleted.
3046 static inline int __dev_uc_sync(struct net_device
*dev
,
3047 int (*sync
)(struct net_device
*,
3048 const unsigned char *),
3049 int (*unsync
)(struct net_device
*,
3050 const unsigned char *))
3052 return __hw_addr_sync_dev(&dev
->uc
, dev
, sync
, unsync
);
3056 * __dev_uc_unsync - Remove synchonized addresses from device
3057 * @dev: device to sync
3058 * @unsync: function to call if address should be removed
3060 * Remove all addresses that were added to the device by dev_uc_sync().
3062 static inline void __dev_uc_unsync(struct net_device
*dev
,
3063 int (*unsync
)(struct net_device
*,
3064 const unsigned char *))
3066 __hw_addr_unsync_dev(&dev
->uc
, dev
, unsync
);
3069 /* Functions used for multicast addresses handling */
3070 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
3071 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
3072 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3073 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
3074 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
3075 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
3076 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3077 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
3078 void dev_mc_flush(struct net_device
*dev
);
3079 void dev_mc_init(struct net_device
*dev
);
3082 * __dev_mc_sync - Synchonize device's multicast list
3083 * @dev: device to sync
3084 * @sync: function to call if address should be added
3085 * @unsync: function to call if address should be removed
3087 * Add newly added addresses to the interface, and release
3088 * addresses that have been deleted.
3090 static inline int __dev_mc_sync(struct net_device
*dev
,
3091 int (*sync
)(struct net_device
*,
3092 const unsigned char *),
3093 int (*unsync
)(struct net_device
*,
3094 const unsigned char *))
3096 return __hw_addr_sync_dev(&dev
->mc
, dev
, sync
, unsync
);
3100 * __dev_mc_unsync - Remove synchonized addresses from device
3101 * @dev: device to sync
3102 * @unsync: function to call if address should be removed
3104 * Remove all addresses that were added to the device by dev_mc_sync().
3106 static inline void __dev_mc_unsync(struct net_device
*dev
,
3107 int (*unsync
)(struct net_device
*,
3108 const unsigned char *))
3110 __hw_addr_unsync_dev(&dev
->mc
, dev
, unsync
);
3113 /* Functions used for secondary unicast and multicast support */
3114 void dev_set_rx_mode(struct net_device
*dev
);
3115 void __dev_set_rx_mode(struct net_device
*dev
);
3116 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
3117 int dev_set_allmulti(struct net_device
*dev
, int inc
);
3118 void netdev_state_change(struct net_device
*dev
);
3119 void netdev_notify_peers(struct net_device
*dev
);
3120 void netdev_features_change(struct net_device
*dev
);
3121 /* Load a device via the kmod */
3122 void dev_load(struct net
*net
, const char *name
);
3123 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
3124 struct rtnl_link_stats64
*storage
);
3125 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
3126 const struct net_device_stats
*netdev_stats
);
3128 extern int netdev_max_backlog
;
3129 extern int netdev_tstamp_prequeue
;
3130 extern int weight_p
;
3131 extern int bpf_jit_enable
;
3133 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
3134 struct net_device
*netdev_upper_get_next_dev_rcu(struct net_device
*dev
,
3135 struct list_head
**iter
);
3136 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
3137 struct list_head
**iter
);
3139 /* iterate through upper list, must be called under RCU read lock */
3140 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
3141 for (iter = &(dev)->adj_list.upper, \
3142 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
3144 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
3146 /* iterate through upper list, must be called under RCU read lock */
3147 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3148 for (iter = &(dev)->all_adj_list.upper, \
3149 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3151 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3153 void *netdev_lower_get_next_private(struct net_device
*dev
,
3154 struct list_head
**iter
);
3155 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
3156 struct list_head
**iter
);
3158 #define netdev_for_each_lower_private(dev, priv, iter) \
3159 for (iter = (dev)->adj_list.lower.next, \
3160 priv = netdev_lower_get_next_private(dev, &(iter)); \
3162 priv = netdev_lower_get_next_private(dev, &(iter)))
3164 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3165 for (iter = &(dev)->adj_list.lower, \
3166 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3168 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3170 void *netdev_lower_get_next(struct net_device
*dev
,
3171 struct list_head
**iter
);
3172 #define netdev_for_each_lower_dev(dev, ldev, iter) \
3173 for (iter = &(dev)->adj_list.lower, \
3174 ldev = netdev_lower_get_next(dev, &(iter)); \
3176 ldev = netdev_lower_get_next(dev, &(iter)))
3178 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
3179 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
3180 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
3181 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
3182 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
);
3183 int netdev_master_upper_dev_link(struct net_device
*dev
,
3184 struct net_device
*upper_dev
);
3185 int netdev_master_upper_dev_link_private(struct net_device
*dev
,
3186 struct net_device
*upper_dev
,
3188 void netdev_upper_dev_unlink(struct net_device
*dev
,
3189 struct net_device
*upper_dev
);
3190 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
3191 void *netdev_lower_dev_get_private(struct net_device
*dev
,
3192 struct net_device
*lower_dev
);
3193 int dev_get_nest_level(struct net_device
*dev
,
3194 bool (*type_check
)(struct net_device
*dev
));
3195 int skb_checksum_help(struct sk_buff
*skb
);
3196 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
3197 netdev_features_t features
, bool tx_path
);
3198 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
3199 netdev_features_t features
);
3202 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
3204 return __skb_gso_segment(skb
, features
, true);
3206 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
3208 static inline bool can_checksum_protocol(netdev_features_t features
,
3211 return ((features
& NETIF_F_GEN_CSUM
) ||
3212 ((features
& NETIF_F_V4_CSUM
) &&
3213 protocol
== htons(ETH_P_IP
)) ||
3214 ((features
& NETIF_F_V6_CSUM
) &&
3215 protocol
== htons(ETH_P_IPV6
)) ||
3216 ((features
& NETIF_F_FCOE_CRC
) &&
3217 protocol
== htons(ETH_P_FCOE
)));
3221 void netdev_rx_csum_fault(struct net_device
*dev
);
3223 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
3227 /* rx skb timestamps */
3228 void net_enable_timestamp(void);
3229 void net_disable_timestamp(void);
3231 #ifdef CONFIG_PROC_FS
3232 int __init
dev_proc_init(void);
3234 #define dev_proc_init() 0
3237 int netdev_class_create_file_ns(struct class_attribute
*class_attr
,
3239 void netdev_class_remove_file_ns(struct class_attribute
*class_attr
,
3242 static inline int netdev_class_create_file(struct class_attribute
*class_attr
)
3244 return netdev_class_create_file_ns(class_attr
, NULL
);
3247 static inline void netdev_class_remove_file(struct class_attribute
*class_attr
)
3249 netdev_class_remove_file_ns(class_attr
, NULL
);
3252 extern struct kobj_ns_type_operations net_ns_type_operations
;
3254 const char *netdev_drivername(const struct net_device
*dev
);
3256 void linkwatch_run_queue(void);
3258 static inline netdev_features_t
netdev_intersect_features(netdev_features_t f1
,
3259 netdev_features_t f2
)
3261 if (f1
& NETIF_F_GEN_CSUM
)
3262 f1
|= (NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3263 if (f2
& NETIF_F_GEN_CSUM
)
3264 f2
|= (NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3266 if (f1
& NETIF_F_GEN_CSUM
)
3267 f1
&= ~(NETIF_F_ALL_CSUM
& ~NETIF_F_GEN_CSUM
);
3272 static inline netdev_features_t
netdev_get_wanted_features(
3273 struct net_device
*dev
)
3275 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
3277 netdev_features_t
netdev_increment_features(netdev_features_t all
,
3278 netdev_features_t one
, netdev_features_t mask
);
3280 /* Allow TSO being used on stacked device :
3281 * Performing the GSO segmentation before last device
3282 * is a performance improvement.
3284 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
3285 netdev_features_t mask
)
3287 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
3290 int __netdev_update_features(struct net_device
*dev
);
3291 void netdev_update_features(struct net_device
*dev
);
3292 void netdev_change_features(struct net_device
*dev
);
3294 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
3295 struct net_device
*dev
);
3297 netdev_features_t
netif_skb_features(struct sk_buff
*skb
);
3299 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
3301 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
3303 /* check flags correspondence */
3304 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
3305 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
3306 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
3307 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
3308 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
3309 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
3310 BUILD_BUG_ON(SKB_GSO_GRE
!= (NETIF_F_GSO_GRE
>> NETIF_F_GSO_SHIFT
));
3311 BUILD_BUG_ON(SKB_GSO_GRE_CSUM
!= (NETIF_F_GSO_GRE_CSUM
>> NETIF_F_GSO_SHIFT
));
3312 BUILD_BUG_ON(SKB_GSO_IPIP
!= (NETIF_F_GSO_IPIP
>> NETIF_F_GSO_SHIFT
));
3313 BUILD_BUG_ON(SKB_GSO_SIT
!= (NETIF_F_GSO_SIT
>> NETIF_F_GSO_SHIFT
));
3314 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL
!= (NETIF_F_GSO_UDP_TUNNEL
>> NETIF_F_GSO_SHIFT
));
3315 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM
!= (NETIF_F_GSO_UDP_TUNNEL_CSUM
>> NETIF_F_GSO_SHIFT
));
3316 BUILD_BUG_ON(SKB_GSO_MPLS
!= (NETIF_F_GSO_MPLS
>> NETIF_F_GSO_SHIFT
));
3318 return (features
& feature
) == feature
;
3321 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
3323 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
3324 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
3327 static inline bool netif_needs_gso(struct sk_buff
*skb
,
3328 netdev_features_t features
)
3330 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
3331 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
3332 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
3335 static inline void netif_set_gso_max_size(struct net_device
*dev
,
3338 dev
->gso_max_size
= size
;
3341 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
3342 int pulled_hlen
, u16 mac_offset
,
3345 skb
->protocol
= protocol
;
3346 skb
->encapsulation
= 1;
3347 skb_push(skb
, pulled_hlen
);
3348 skb_reset_transport_header(skb
);
3349 skb
->mac_header
= mac_offset
;
3350 skb
->network_header
= skb
->mac_header
+ mac_len
;
3351 skb
->mac_len
= mac_len
;
3354 static inline bool netif_is_macvlan(struct net_device
*dev
)
3356 return dev
->priv_flags
& IFF_MACVLAN
;
3359 static inline bool netif_is_bond_master(struct net_device
*dev
)
3361 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
3364 static inline bool netif_is_bond_slave(struct net_device
*dev
)
3366 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
3369 static inline bool netif_supports_nofcs(struct net_device
*dev
)
3371 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
3374 extern struct pernet_operations __net_initdata loopback_net_ops
;
3376 /* Logging, debugging and troubleshooting/diagnostic helpers. */
3378 /* netdev_printk helpers, similar to dev_printk */
3380 static inline const char *netdev_name(const struct net_device
*dev
)
3382 if (dev
->reg_state
!= NETREG_REGISTERED
)
3383 return "(unregistered net_device)";
3388 int netdev_printk(const char *level
, const struct net_device
*dev
,
3389 const char *format
, ...);
3391 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
3393 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
3395 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
3397 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
3399 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
3401 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
3403 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
3405 #define MODULE_ALIAS_NETDEV(device) \
3406 MODULE_ALIAS("netdev-" device)
3408 #if defined(CONFIG_DYNAMIC_DEBUG)
3409 #define netdev_dbg(__dev, format, args...) \
3411 dynamic_netdev_dbg(__dev, format, ##args); \
3413 #elif defined(DEBUG)
3414 #define netdev_dbg(__dev, format, args...) \
3415 netdev_printk(KERN_DEBUG, __dev, format, ##args)
3417 #define netdev_dbg(__dev, format, args...) \
3420 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
3425 #if defined(VERBOSE_DEBUG)
3426 #define netdev_vdbg netdev_dbg
3429 #define netdev_vdbg(dev, format, args...) \
3432 netdev_printk(KERN_DEBUG, dev, format, ##args); \
3438 * netdev_WARN() acts like dev_printk(), but with the key difference
3439 * of using a WARN/WARN_ON to get the message out, including the
3440 * file/line information and a backtrace.
3442 #define netdev_WARN(dev, format, args...) \
3443 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args)
3445 /* netif printk helpers, similar to netdev_printk */
3447 #define netif_printk(priv, type, level, dev, fmt, args...) \
3449 if (netif_msg_##type(priv)) \
3450 netdev_printk(level, (dev), fmt, ##args); \
3453 #define netif_level(level, priv, type, dev, fmt, args...) \
3455 if (netif_msg_##type(priv)) \
3456 netdev_##level(dev, fmt, ##args); \
3459 #define netif_emerg(priv, type, dev, fmt, args...) \
3460 netif_level(emerg, priv, type, dev, fmt, ##args)
3461 #define netif_alert(priv, type, dev, fmt, args...) \
3462 netif_level(alert, priv, type, dev, fmt, ##args)
3463 #define netif_crit(priv, type, dev, fmt, args...) \
3464 netif_level(crit, priv, type, dev, fmt, ##args)
3465 #define netif_err(priv, type, dev, fmt, args...) \
3466 netif_level(err, priv, type, dev, fmt, ##args)
3467 #define netif_warn(priv, type, dev, fmt, args...) \
3468 netif_level(warn, priv, type, dev, fmt, ##args)
3469 #define netif_notice(priv, type, dev, fmt, args...) \
3470 netif_level(notice, priv, type, dev, fmt, ##args)
3471 #define netif_info(priv, type, dev, fmt, args...) \
3472 netif_level(info, priv, type, dev, fmt, ##args)
3474 #if defined(CONFIG_DYNAMIC_DEBUG)
3475 #define netif_dbg(priv, type, netdev, format, args...) \
3477 if (netif_msg_##type(priv)) \
3478 dynamic_netdev_dbg(netdev, format, ##args); \
3480 #elif defined(DEBUG)
3481 #define netif_dbg(priv, type, dev, format, args...) \
3482 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3484 #define netif_dbg(priv, type, dev, format, args...) \
3487 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3492 #if defined(VERBOSE_DEBUG)
3493 #define netif_vdbg netif_dbg
3495 #define netif_vdbg(priv, type, dev, format, args...) \
3498 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3504 * The list of packet types we will receive (as opposed to discard)
3505 * and the routines to invoke.
3507 * Why 16. Because with 16 the only overlap we get on a hash of the
3508 * low nibble of the protocol value is RARP/SNAP/X.25.
3510 * NOTE: That is no longer true with the addition of VLAN tags. Not
3511 * sure which should go first, but I bet it won't make much
3512 * difference if we are running VLANs. The good news is that
3513 * this protocol won't be in the list unless compiled in, so
3514 * the average user (w/out VLANs) will not be adversely affected.
3530 #define PTYPE_HASH_SIZE (16)
3531 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3533 #endif /* _LINUX_NETDEVICE_H */