2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
28 #include <linux/pm_qos.h>
29 #include <linux/timer.h>
30 #include <linux/bug.h>
31 #include <linux/delay.h>
32 #include <linux/atomic.h>
33 #include <asm/cache.h>
34 #include <asm/byteorder.h>
36 #include <linux/percpu.h>
37 #include <linux/rculist.h>
38 #include <linux/dmaengine.h>
39 #include <linux/workqueue.h>
40 #include <linux/dynamic_queue_limits.h>
42 #include <linux/ethtool.h>
43 #include <net/net_namespace.h>
46 #include <net/dcbnl.h>
48 #include <net/netprio_cgroup.h>
50 #include <linux/netdev_features.h>
51 #include <linux/neighbour.h>
52 #include <uapi/linux/netdevice.h>
59 /* source back-compat hooks */
60 #define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
63 void netdev_set_default_ethtool_ops(struct net_device
*dev
,
64 const struct ethtool_ops
*ops
);
66 /* Backlog congestion levels */
67 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
68 #define NET_RX_DROP 1 /* packet dropped */
71 * Transmit return codes: transmit return codes originate from three different
74 * - qdisc return codes
75 * - driver transmit return codes
78 * Drivers are allowed to return any one of those in their hard_start_xmit()
79 * function. Real network devices commonly used with qdiscs should only return
80 * the driver transmit return codes though - when qdiscs are used, the actual
81 * transmission happens asynchronously, so the value is not propagated to
82 * higher layers. Virtual network devices transmit synchronously, in this case
83 * the driver transmit return codes are consumed by dev_queue_xmit(), all
84 * others are propagated to higher layers.
87 /* qdisc ->enqueue() return codes. */
88 #define NET_XMIT_SUCCESS 0x00
89 #define NET_XMIT_DROP 0x01 /* skb dropped */
90 #define NET_XMIT_CN 0x02 /* congestion notification */
91 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
92 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
94 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
95 * indicates that the device will soon be dropping packets, or already drops
96 * some packets of the same priority; prompting us to send less aggressively. */
97 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
98 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
100 /* Driver transmit return codes */
101 #define NETDEV_TX_MASK 0xf0
104 __NETDEV_TX_MIN
= INT_MIN
, /* make sure enum is signed */
105 NETDEV_TX_OK
= 0x00, /* driver took care of packet */
106 NETDEV_TX_BUSY
= 0x10, /* driver tx path was busy*/
107 NETDEV_TX_LOCKED
= 0x20, /* driver tx lock was already taken */
109 typedef enum netdev_tx netdev_tx_t
;
112 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
113 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
115 static inline bool dev_xmit_complete(int rc
)
118 * Positive cases with an skb consumed by a driver:
119 * - successful transmission (rc == NETDEV_TX_OK)
120 * - error while transmitting (rc < 0)
121 * - error while queueing to a different device (rc & NET_XMIT_MASK)
123 if (likely(rc
< NET_XMIT_MASK
))
130 * Compute the worst case header length according to the protocols
134 #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
135 # if defined(CONFIG_MAC80211_MESH)
136 # define LL_MAX_HEADER 128
138 # define LL_MAX_HEADER 96
141 # define LL_MAX_HEADER 32
144 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
145 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
146 #define MAX_HEADER LL_MAX_HEADER
148 #define MAX_HEADER (LL_MAX_HEADER + 48)
152 * Old network device statistics. Fields are native words
153 * (unsigned long) so they can be read and written atomically.
156 struct net_device_stats
{
157 unsigned long rx_packets
;
158 unsigned long tx_packets
;
159 unsigned long rx_bytes
;
160 unsigned long tx_bytes
;
161 unsigned long rx_errors
;
162 unsigned long tx_errors
;
163 unsigned long rx_dropped
;
164 unsigned long tx_dropped
;
165 unsigned long multicast
;
166 unsigned long collisions
;
167 unsigned long rx_length_errors
;
168 unsigned long rx_over_errors
;
169 unsigned long rx_crc_errors
;
170 unsigned long rx_frame_errors
;
171 unsigned long rx_fifo_errors
;
172 unsigned long rx_missed_errors
;
173 unsigned long tx_aborted_errors
;
174 unsigned long tx_carrier_errors
;
175 unsigned long tx_fifo_errors
;
176 unsigned long tx_heartbeat_errors
;
177 unsigned long tx_window_errors
;
178 unsigned long rx_compressed
;
179 unsigned long tx_compressed
;
183 #include <linux/cache.h>
184 #include <linux/skbuff.h>
187 #include <linux/static_key.h>
188 extern struct static_key rps_needed
;
195 struct netdev_hw_addr
{
196 struct list_head list
;
197 unsigned char addr
[MAX_ADDR_LEN
];
199 #define NETDEV_HW_ADDR_T_LAN 1
200 #define NETDEV_HW_ADDR_T_SAN 2
201 #define NETDEV_HW_ADDR_T_SLAVE 3
202 #define NETDEV_HW_ADDR_T_UNICAST 4
203 #define NETDEV_HW_ADDR_T_MULTICAST 5
208 struct rcu_head rcu_head
;
211 struct netdev_hw_addr_list
{
212 struct list_head list
;
216 #define netdev_hw_addr_list_count(l) ((l)->count)
217 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
218 #define netdev_hw_addr_list_for_each(ha, l) \
219 list_for_each_entry(ha, &(l)->list, list)
221 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
222 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
223 #define netdev_for_each_uc_addr(ha, dev) \
224 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
226 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
227 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
228 #define netdev_for_each_mc_addr(ha, dev) \
229 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
236 /* cached hardware header; allow for machine alignment needs. */
237 #define HH_DATA_MOD 16
238 #define HH_DATA_OFF(__len) \
239 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
240 #define HH_DATA_ALIGN(__len) \
241 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
242 unsigned long hh_data
[HH_DATA_ALIGN(LL_MAX_HEADER
) / sizeof(long)];
245 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
247 * dev->hard_header_len ? (dev->hard_header_len +
248 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
250 * We could use other alignment values, but we must maintain the
251 * relationship HH alignment <= LL alignment.
253 #define LL_RESERVED_SPACE(dev) \
254 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
255 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
256 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
259 int (*create
) (struct sk_buff
*skb
, struct net_device
*dev
,
260 unsigned short type
, const void *daddr
,
261 const void *saddr
, unsigned int len
);
262 int (*parse
)(const struct sk_buff
*skb
, unsigned char *haddr
);
263 int (*rebuild
)(struct sk_buff
*skb
);
264 int (*cache
)(const struct neighbour
*neigh
, struct hh_cache
*hh
, __be16 type
);
265 void (*cache_update
)(struct hh_cache
*hh
,
266 const struct net_device
*dev
,
267 const unsigned char *haddr
);
270 /* These flag bits are private to the generic network queueing
271 * layer, they may not be explicitly referenced by any other
275 enum netdev_state_t
{
277 __LINK_STATE_PRESENT
,
278 __LINK_STATE_NOCARRIER
,
279 __LINK_STATE_LINKWATCH_PENDING
,
280 __LINK_STATE_DORMANT
,
285 * This structure holds at boot time configured netdevice settings. They
286 * are then used in the device probing.
288 struct netdev_boot_setup
{
292 #define NETDEV_BOOT_SETUP_MAX 8
294 int __init
netdev_boot_setup(char *str
);
297 * Structure for NAPI scheduling similar to tasklet but with weighting
300 /* The poll_list must only be managed by the entity which
301 * changes the state of the NAPI_STATE_SCHED bit. This means
302 * whoever atomically sets that bit can add this napi_struct
303 * to the per-cpu poll_list, and whoever clears that bit
304 * can remove from the list right before clearing the bit.
306 struct list_head poll_list
;
310 unsigned int gro_count
;
311 int (*poll
)(struct napi_struct
*, int);
312 #ifdef CONFIG_NETPOLL
313 spinlock_t poll_lock
;
316 struct net_device
*dev
;
317 struct sk_buff
*gro_list
;
319 struct list_head dev_list
;
320 struct hlist_node napi_hash_node
;
321 unsigned int napi_id
;
325 NAPI_STATE_SCHED
, /* Poll is scheduled */
326 NAPI_STATE_DISABLE
, /* Disable pending */
327 NAPI_STATE_NPSVC
, /* Netpoll - don't dequeue from poll_list */
328 NAPI_STATE_HASHED
, /* In NAPI hash */
338 typedef enum gro_result gro_result_t
;
341 * enum rx_handler_result - Possible return values for rx_handlers.
342 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
344 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
345 * case skb->dev was changed by rx_handler.
346 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
347 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
349 * rx_handlers are functions called from inside __netif_receive_skb(), to do
350 * special processing of the skb, prior to delivery to protocol handlers.
352 * Currently, a net_device can only have a single rx_handler registered. Trying
353 * to register a second rx_handler will return -EBUSY.
355 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
356 * To unregister a rx_handler on a net_device, use
357 * netdev_rx_handler_unregister().
359 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
362 * If the rx_handler consumed to skb in some way, it should return
363 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
364 * the skb to be delivered in some other ways.
366 * If the rx_handler changed skb->dev, to divert the skb to another
367 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
368 * new device will be called if it exists.
370 * If the rx_handler consider the skb should be ignored, it should return
371 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
372 * are registered on exact device (ptype->dev == skb->dev).
374 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
375 * delivered, it should return RX_HANDLER_PASS.
377 * A device without a registered rx_handler will behave as if rx_handler
378 * returned RX_HANDLER_PASS.
381 enum rx_handler_result
{
387 typedef enum rx_handler_result rx_handler_result_t
;
388 typedef rx_handler_result_t
rx_handler_func_t(struct sk_buff
**pskb
);
390 void __napi_schedule(struct napi_struct
*n
);
392 static inline bool napi_disable_pending(struct napi_struct
*n
)
394 return test_bit(NAPI_STATE_DISABLE
, &n
->state
);
398 * napi_schedule_prep - check if napi can be scheduled
401 * Test if NAPI routine is already running, and if not mark
402 * it as running. This is used as a condition variable
403 * insure only one NAPI poll instance runs. We also make
404 * sure there is no pending NAPI disable.
406 static inline bool napi_schedule_prep(struct napi_struct
*n
)
408 return !napi_disable_pending(n
) &&
409 !test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
);
413 * napi_schedule - schedule NAPI poll
416 * Schedule NAPI poll routine to be called if it is not already
419 static inline void napi_schedule(struct napi_struct
*n
)
421 if (napi_schedule_prep(n
))
425 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
426 static inline bool napi_reschedule(struct napi_struct
*napi
)
428 if (napi_schedule_prep(napi
)) {
429 __napi_schedule(napi
);
436 * napi_complete - NAPI processing complete
439 * Mark NAPI processing as complete.
441 void __napi_complete(struct napi_struct
*n
);
442 void napi_complete(struct napi_struct
*n
);
445 * napi_by_id - lookup a NAPI by napi_id
446 * @napi_id: hashed napi_id
448 * lookup @napi_id in napi_hash table
449 * must be called under rcu_read_lock()
451 struct napi_struct
*napi_by_id(unsigned int napi_id
);
454 * napi_hash_add - add a NAPI to global hashtable
455 * @napi: napi context
457 * generate a new napi_id and store a @napi under it in napi_hash
459 void napi_hash_add(struct napi_struct
*napi
);
462 * napi_hash_del - remove a NAPI from global table
463 * @napi: napi context
465 * Warning: caller must observe rcu grace period
466 * before freeing memory containing @napi
468 void napi_hash_del(struct napi_struct
*napi
);
471 * napi_disable - prevent NAPI from scheduling
474 * Stop NAPI from being scheduled on this context.
475 * Waits till any outstanding processing completes.
477 static inline void napi_disable(struct napi_struct
*n
)
480 set_bit(NAPI_STATE_DISABLE
, &n
->state
);
481 while (test_and_set_bit(NAPI_STATE_SCHED
, &n
->state
))
483 clear_bit(NAPI_STATE_DISABLE
, &n
->state
);
487 * napi_enable - enable NAPI scheduling
490 * Resume NAPI from being scheduled on this context.
491 * Must be paired with napi_disable.
493 static inline void napi_enable(struct napi_struct
*n
)
495 BUG_ON(!test_bit(NAPI_STATE_SCHED
, &n
->state
));
496 smp_mb__before_clear_bit();
497 clear_bit(NAPI_STATE_SCHED
, &n
->state
);
502 * napi_synchronize - wait until NAPI is not running
505 * Wait until NAPI is done being scheduled on this context.
506 * Waits till any outstanding processing completes but
507 * does not disable future activations.
509 static inline void napi_synchronize(const struct napi_struct
*n
)
511 while (test_bit(NAPI_STATE_SCHED
, &n
->state
))
515 # define napi_synchronize(n) barrier()
518 enum netdev_queue_state_t
{
519 __QUEUE_STATE_DRV_XOFF
,
520 __QUEUE_STATE_STACK_XOFF
,
521 __QUEUE_STATE_FROZEN
,
522 #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
523 (1 << __QUEUE_STATE_STACK_XOFF))
524 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
525 (1 << __QUEUE_STATE_FROZEN))
528 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
529 * netif_tx_* functions below are used to manipulate this flag. The
530 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
531 * queue independently. The netif_xmit_*stopped functions below are called
532 * to check if the queue has been stopped by the driver or stack (either
533 * of the XOFF bits are set in the state). Drivers should not need to call
534 * netif_xmit*stopped functions, they should only be using netif_tx_*.
537 struct netdev_queue
{
541 struct net_device
*dev
;
543 struct Qdisc
*qdisc_sleeping
;
547 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
553 spinlock_t _xmit_lock ____cacheline_aligned_in_smp
;
556 * please use this field instead of dev->trans_start
558 unsigned long trans_start
;
561 * Number of TX timeouts for this queue
562 * (/sys/class/net/DEV/Q/trans_timeout)
564 unsigned long trans_timeout
;
571 } ____cacheline_aligned_in_smp
;
573 static inline int netdev_queue_numa_node_read(const struct netdev_queue
*q
)
575 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
582 static inline void netdev_queue_numa_node_write(struct netdev_queue
*q
, int node
)
584 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
591 * This structure holds an RPS map which can be of variable length. The
592 * map is an array of CPUs.
599 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
602 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
603 * tail pointer for that CPU's input queue at the time of last enqueue, and
604 * a hardware filter index.
606 struct rps_dev_flow
{
609 unsigned int last_qtail
;
611 #define RPS_NO_FILTER 0xffff
614 * The rps_dev_flow_table structure contains a table of flow mappings.
616 struct rps_dev_flow_table
{
619 struct rps_dev_flow flows
[0];
621 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
622 ((_num) * sizeof(struct rps_dev_flow)))
625 * The rps_sock_flow_table contains mappings of flows to the last CPU
626 * on which they were processed by the application (set in recvmsg).
628 struct rps_sock_flow_table
{
632 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
633 ((_num) * sizeof(u16)))
635 #define RPS_NO_CPU 0xffff
637 static inline void rps_record_sock_flow(struct rps_sock_flow_table
*table
,
641 unsigned int cpu
, index
= hash
& table
->mask
;
643 /* We only give a hint, preemption can change cpu under us */
644 cpu
= raw_smp_processor_id();
646 if (table
->ents
[index
] != cpu
)
647 table
->ents
[index
] = cpu
;
651 static inline void rps_reset_sock_flow(struct rps_sock_flow_table
*table
,
655 table
->ents
[hash
& table
->mask
] = RPS_NO_CPU
;
658 extern struct rps_sock_flow_table __rcu
*rps_sock_flow_table
;
660 #ifdef CONFIG_RFS_ACCEL
661 bool rps_may_expire_flow(struct net_device
*dev
, u16 rxq_index
, u32 flow_id
,
664 #endif /* CONFIG_RPS */
666 /* This structure contains an instance of an RX queue. */
667 struct netdev_rx_queue
{
669 struct rps_map __rcu
*rps_map
;
670 struct rps_dev_flow_table __rcu
*rps_flow_table
;
673 struct net_device
*dev
;
674 } ____cacheline_aligned_in_smp
;
677 * RX queue sysfs structures and functions.
679 struct rx_queue_attribute
{
680 struct attribute attr
;
681 ssize_t (*show
)(struct netdev_rx_queue
*queue
,
682 struct rx_queue_attribute
*attr
, char *buf
);
683 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
684 struct rx_queue_attribute
*attr
, const char *buf
, size_t len
);
689 * This structure holds an XPS map which can be of variable length. The
690 * map is an array of queues.
694 unsigned int alloc_len
;
698 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
699 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
703 * This structure holds all XPS maps for device. Maps are indexed by CPU.
705 struct xps_dev_maps
{
707 struct xps_map __rcu
*cpu_map
[0];
709 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
710 (nr_cpu_ids * sizeof(struct xps_map *)))
711 #endif /* CONFIG_XPS */
713 #define TC_MAX_QUEUE 16
714 #define TC_BITMASK 15
715 /* HW offloaded queuing disciplines txq count and offset maps */
716 struct netdev_tc_txq
{
721 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
723 * This structure is to hold information about the device
724 * configured to run FCoE protocol stack.
726 struct netdev_fcoe_hbainfo
{
727 char manufacturer
[64];
728 char serial_number
[64];
729 char hardware_version
[64];
730 char driver_version
[64];
731 char optionrom_version
[64];
732 char firmware_version
[64];
734 char model_description
[256];
738 #define MAX_PHYS_PORT_ID_LEN 32
740 /* This structure holds a unique identifier to identify the
741 * physical port used by a netdevice.
743 struct netdev_phys_port_id
{
744 unsigned char id
[MAX_PHYS_PORT_ID_LEN
];
745 unsigned char id_len
;
748 typedef u16 (*select_queue_fallback_t
)(struct net_device
*dev
,
749 struct sk_buff
*skb
);
752 * This structure defines the management hooks for network devices.
753 * The following hooks can be defined; unless noted otherwise, they are
754 * optional and can be filled with a null pointer.
756 * int (*ndo_init)(struct net_device *dev);
757 * This function is called once when network device is registered.
758 * The network device can use this to any late stage initializaton
759 * or semantic validattion. It can fail with an error code which will
760 * be propogated back to register_netdev
762 * void (*ndo_uninit)(struct net_device *dev);
763 * This function is called when device is unregistered or when registration
764 * fails. It is not called if init fails.
766 * int (*ndo_open)(struct net_device *dev);
767 * This function is called when network device transistions to the up
770 * int (*ndo_stop)(struct net_device *dev);
771 * This function is called when network device transistions to the down
774 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
775 * struct net_device *dev);
776 * Called when a packet needs to be transmitted.
777 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
778 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
779 * Required can not be NULL.
781 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
782 * void *accel_priv, select_queue_fallback_t fallback);
783 * Called to decide which queue to when device supports multiple
786 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
787 * This function is called to allow device receiver to make
788 * changes to configuration when multicast or promiscious is enabled.
790 * void (*ndo_set_rx_mode)(struct net_device *dev);
791 * This function is called device changes address list filtering.
792 * If driver handles unicast address filtering, it should set
793 * IFF_UNICAST_FLT to its priv_flags.
795 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
796 * This function is called when the Media Access Control address
797 * needs to be changed. If this interface is not defined, the
798 * mac address can not be changed.
800 * int (*ndo_validate_addr)(struct net_device *dev);
801 * Test if Media Access Control address is valid for the device.
803 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
804 * Called when a user request an ioctl which can't be handled by
805 * the generic interface code. If not defined ioctl's return
806 * not supported error code.
808 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
809 * Used to set network devices bus interface parameters. This interface
810 * is retained for legacy reason, new devices should use the bus
811 * interface (PCI) for low level management.
813 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
814 * Called when a user wants to change the Maximum Transfer Unit
815 * of a device. If not defined, any request to change MTU will
816 * will return an error.
818 * void (*ndo_tx_timeout)(struct net_device *dev);
819 * Callback uses when the transmitter has not made any progress
820 * for dev->watchdog ticks.
822 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
823 * struct rtnl_link_stats64 *storage);
824 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
825 * Called when a user wants to get the network device usage
826 * statistics. Drivers must do one of the following:
827 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
828 * rtnl_link_stats64 structure passed by the caller.
829 * 2. Define @ndo_get_stats to update a net_device_stats structure
830 * (which should normally be dev->stats) and return a pointer to
831 * it. The structure may be changed asynchronously only if each
832 * field is written atomically.
833 * 3. Update dev->stats asynchronously and atomically, and define
836 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
837 * If device support VLAN filtering this function is called when a
838 * VLAN id is registered.
840 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
841 * If device support VLAN filtering this function is called when a
842 * VLAN id is unregistered.
844 * void (*ndo_poll_controller)(struct net_device *dev);
846 * SR-IOV management functions.
847 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
848 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
849 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
850 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
851 * int (*ndo_get_vf_config)(struct net_device *dev,
852 * int vf, struct ifla_vf_info *ivf);
853 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
854 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
855 * struct nlattr *port[]);
856 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
857 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
858 * Called to setup 'tc' number of traffic classes in the net device. This
859 * is always called from the stack with the rtnl lock held and netif tx
860 * queues stopped. This allows the netdevice to perform queue management
863 * Fiber Channel over Ethernet (FCoE) offload functions.
864 * int (*ndo_fcoe_enable)(struct net_device *dev);
865 * Called when the FCoE protocol stack wants to start using LLD for FCoE
866 * so the underlying device can perform whatever needed configuration or
867 * initialization to support acceleration of FCoE traffic.
869 * int (*ndo_fcoe_disable)(struct net_device *dev);
870 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
871 * so the underlying device can perform whatever needed clean-ups to
872 * stop supporting acceleration of FCoE traffic.
874 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
875 * struct scatterlist *sgl, unsigned int sgc);
876 * Called when the FCoE Initiator wants to initialize an I/O that
877 * is a possible candidate for Direct Data Placement (DDP). The LLD can
878 * perform necessary setup and returns 1 to indicate the device is set up
879 * successfully to perform DDP on this I/O, otherwise this returns 0.
881 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
882 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
883 * indicated by the FC exchange id 'xid', so the underlying device can
884 * clean up and reuse resources for later DDP requests.
886 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
887 * struct scatterlist *sgl, unsigned int sgc);
888 * Called when the FCoE Target wants to initialize an I/O that
889 * is a possible candidate for Direct Data Placement (DDP). The LLD can
890 * perform necessary setup and returns 1 to indicate the device is set up
891 * successfully to perform DDP on this I/O, otherwise this returns 0.
893 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
894 * struct netdev_fcoe_hbainfo *hbainfo);
895 * Called when the FCoE Protocol stack wants information on the underlying
896 * device. This information is utilized by the FCoE protocol stack to
897 * register attributes with Fiber Channel management service as per the
898 * FC-GS Fabric Device Management Information(FDMI) specification.
900 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
901 * Called when the underlying device wants to override default World Wide
902 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
903 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
904 * protocol stack to use.
907 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
908 * u16 rxq_index, u32 flow_id);
909 * Set hardware filter for RFS. rxq_index is the target queue index;
910 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
911 * Return the filter ID on success, or a negative error code.
913 * Slave management functions (for bridge, bonding, etc).
914 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
915 * Called to make another netdev an underling.
917 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
918 * Called to release previously enslaved netdev.
920 * Feature/offload setting functions.
921 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
922 * netdev_features_t features);
923 * Adjusts the requested feature flags according to device-specific
924 * constraints, and returns the resulting flags. Must not modify
927 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
928 * Called to update device configuration to new features. Passed
929 * feature set might be less than what was returned by ndo_fix_features()).
930 * Must return >0 or -errno if it changed dev->features itself.
932 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
933 * struct net_device *dev,
934 * const unsigned char *addr, u16 flags)
935 * Adds an FDB entry to dev for addr.
936 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
937 * struct net_device *dev,
938 * const unsigned char *addr)
939 * Deletes the FDB entry from dev coresponding to addr.
940 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
941 * struct net_device *dev, int idx)
942 * Used to add FDB entries to dump requests. Implementers should add
943 * entries to skb and update idx with the number of entries.
945 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
946 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
947 * struct net_device *dev, u32 filter_mask)
949 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
950 * Called to change device carrier. Soft-devices (like dummy, team, etc)
951 * which do not represent real hardware may define this to allow their
952 * userspace components to manage their virtual carrier state. Devices
953 * that determine carrier state from physical hardware properties (eg
954 * network cables) or protocol-dependent mechanisms (eg
955 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
957 * int (*ndo_get_phys_port_id)(struct net_device *dev,
958 * struct netdev_phys_port_id *ppid);
959 * Called to get ID of physical port of this device. If driver does
960 * not implement this, it is assumed that the hw is not able to have
961 * multiple net devices on single physical port.
963 * void (*ndo_add_vxlan_port)(struct net_device *dev,
964 * sa_family_t sa_family, __be16 port);
965 * Called by vxlan to notiy a driver about the UDP port and socket
966 * address family that vxlan is listnening to. It is called only when
967 * a new port starts listening. The operation is protected by the
968 * vxlan_net->sock_lock.
970 * void (*ndo_del_vxlan_port)(struct net_device *dev,
971 * sa_family_t sa_family, __be16 port);
972 * Called by vxlan to notify the driver about a UDP port and socket
973 * address family that vxlan is not listening to anymore. The operation
974 * is protected by the vxlan_net->sock_lock.
976 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
977 * struct net_device *dev)
978 * Called by upper layer devices to accelerate switching or other
979 * station functionality into hardware. 'pdev is the lowerdev
980 * to use for the offload and 'dev' is the net device that will
981 * back the offload. Returns a pointer to the private structure
982 * the upper layer will maintain.
983 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
984 * Called by upper layer device to delete the station created
985 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
986 * the station and priv is the structure returned by the add
988 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
989 * struct net_device *dev,
991 * Callback to use for xmit over the accelerated station. This
992 * is used in place of ndo_start_xmit on accelerated net
995 struct net_device_ops
{
996 int (*ndo_init
)(struct net_device
*dev
);
997 void (*ndo_uninit
)(struct net_device
*dev
);
998 int (*ndo_open
)(struct net_device
*dev
);
999 int (*ndo_stop
)(struct net_device
*dev
);
1000 netdev_tx_t (*ndo_start_xmit
) (struct sk_buff
*skb
,
1001 struct net_device
*dev
);
1002 u16 (*ndo_select_queue
)(struct net_device
*dev
,
1003 struct sk_buff
*skb
,
1005 select_queue_fallback_t fallback
);
1006 void (*ndo_change_rx_flags
)(struct net_device
*dev
,
1008 void (*ndo_set_rx_mode
)(struct net_device
*dev
);
1009 int (*ndo_set_mac_address
)(struct net_device
*dev
,
1011 int (*ndo_validate_addr
)(struct net_device
*dev
);
1012 int (*ndo_do_ioctl
)(struct net_device
*dev
,
1013 struct ifreq
*ifr
, int cmd
);
1014 int (*ndo_set_config
)(struct net_device
*dev
,
1016 int (*ndo_change_mtu
)(struct net_device
*dev
,
1018 int (*ndo_neigh_setup
)(struct net_device
*dev
,
1019 struct neigh_parms
*);
1020 void (*ndo_tx_timeout
) (struct net_device
*dev
);
1022 struct rtnl_link_stats64
* (*ndo_get_stats64
)(struct net_device
*dev
,
1023 struct rtnl_link_stats64
*storage
);
1024 struct net_device_stats
* (*ndo_get_stats
)(struct net_device
*dev
);
1026 int (*ndo_vlan_rx_add_vid
)(struct net_device
*dev
,
1027 __be16 proto
, u16 vid
);
1028 int (*ndo_vlan_rx_kill_vid
)(struct net_device
*dev
,
1029 __be16 proto
, u16 vid
);
1030 #ifdef CONFIG_NET_POLL_CONTROLLER
1031 void (*ndo_poll_controller
)(struct net_device
*dev
);
1032 int (*ndo_netpoll_setup
)(struct net_device
*dev
,
1033 struct netpoll_info
*info
);
1034 void (*ndo_netpoll_cleanup
)(struct net_device
*dev
);
1036 #ifdef CONFIG_NET_RX_BUSY_POLL
1037 int (*ndo_busy_poll
)(struct napi_struct
*dev
);
1039 int (*ndo_set_vf_mac
)(struct net_device
*dev
,
1040 int queue
, u8
*mac
);
1041 int (*ndo_set_vf_vlan
)(struct net_device
*dev
,
1042 int queue
, u16 vlan
, u8 qos
);
1043 int (*ndo_set_vf_tx_rate
)(struct net_device
*dev
,
1045 int (*ndo_set_vf_spoofchk
)(struct net_device
*dev
,
1046 int vf
, bool setting
);
1047 int (*ndo_get_vf_config
)(struct net_device
*dev
,
1049 struct ifla_vf_info
*ivf
);
1050 int (*ndo_set_vf_link_state
)(struct net_device
*dev
,
1051 int vf
, int link_state
);
1052 int (*ndo_set_vf_port
)(struct net_device
*dev
,
1054 struct nlattr
*port
[]);
1055 int (*ndo_get_vf_port
)(struct net_device
*dev
,
1056 int vf
, struct sk_buff
*skb
);
1057 int (*ndo_setup_tc
)(struct net_device
*dev
, u8 tc
);
1058 #if IS_ENABLED(CONFIG_FCOE)
1059 int (*ndo_fcoe_enable
)(struct net_device
*dev
);
1060 int (*ndo_fcoe_disable
)(struct net_device
*dev
);
1061 int (*ndo_fcoe_ddp_setup
)(struct net_device
*dev
,
1063 struct scatterlist
*sgl
,
1065 int (*ndo_fcoe_ddp_done
)(struct net_device
*dev
,
1067 int (*ndo_fcoe_ddp_target
)(struct net_device
*dev
,
1069 struct scatterlist
*sgl
,
1071 int (*ndo_fcoe_get_hbainfo
)(struct net_device
*dev
,
1072 struct netdev_fcoe_hbainfo
*hbainfo
);
1075 #if IS_ENABLED(CONFIG_LIBFCOE)
1076 #define NETDEV_FCOE_WWNN 0
1077 #define NETDEV_FCOE_WWPN 1
1078 int (*ndo_fcoe_get_wwn
)(struct net_device
*dev
,
1079 u64
*wwn
, int type
);
1082 #ifdef CONFIG_RFS_ACCEL
1083 int (*ndo_rx_flow_steer
)(struct net_device
*dev
,
1084 const struct sk_buff
*skb
,
1088 int (*ndo_add_slave
)(struct net_device
*dev
,
1089 struct net_device
*slave_dev
);
1090 int (*ndo_del_slave
)(struct net_device
*dev
,
1091 struct net_device
*slave_dev
);
1092 netdev_features_t (*ndo_fix_features
)(struct net_device
*dev
,
1093 netdev_features_t features
);
1094 int (*ndo_set_features
)(struct net_device
*dev
,
1095 netdev_features_t features
);
1096 int (*ndo_neigh_construct
)(struct neighbour
*n
);
1097 void (*ndo_neigh_destroy
)(struct neighbour
*n
);
1099 int (*ndo_fdb_add
)(struct ndmsg
*ndm
,
1100 struct nlattr
*tb
[],
1101 struct net_device
*dev
,
1102 const unsigned char *addr
,
1104 int (*ndo_fdb_del
)(struct ndmsg
*ndm
,
1105 struct nlattr
*tb
[],
1106 struct net_device
*dev
,
1107 const unsigned char *addr
);
1108 int (*ndo_fdb_dump
)(struct sk_buff
*skb
,
1109 struct netlink_callback
*cb
,
1110 struct net_device
*dev
,
1113 int (*ndo_bridge_setlink
)(struct net_device
*dev
,
1114 struct nlmsghdr
*nlh
);
1115 int (*ndo_bridge_getlink
)(struct sk_buff
*skb
,
1117 struct net_device
*dev
,
1119 int (*ndo_bridge_dellink
)(struct net_device
*dev
,
1120 struct nlmsghdr
*nlh
);
1121 int (*ndo_change_carrier
)(struct net_device
*dev
,
1123 int (*ndo_get_phys_port_id
)(struct net_device
*dev
,
1124 struct netdev_phys_port_id
*ppid
);
1125 void (*ndo_add_vxlan_port
)(struct net_device
*dev
,
1126 sa_family_t sa_family
,
1128 void (*ndo_del_vxlan_port
)(struct net_device
*dev
,
1129 sa_family_t sa_family
,
1132 void* (*ndo_dfwd_add_station
)(struct net_device
*pdev
,
1133 struct net_device
*dev
);
1134 void (*ndo_dfwd_del_station
)(struct net_device
*pdev
,
1137 netdev_tx_t (*ndo_dfwd_start_xmit
) (struct sk_buff
*skb
,
1138 struct net_device
*dev
,
1143 * enum net_device_priv_flags - &struct net_device priv_flags
1145 * These are the &struct net_device, they are only set internally
1146 * by drivers and used in the kernel. These flags are invisible to
1147 * userspace, this means that the order of these flags can change
1148 * during any kernel release.
1150 * You should have a pretty good reason to be extending these flags.
1152 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1153 * @IFF_EBRIDGE: Ethernet bridging device
1154 * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active
1155 * @IFF_MASTER_8023AD: bonding master, 802.3ad
1156 * @IFF_MASTER_ALB: bonding master, balance-alb
1157 * @IFF_BONDING: bonding master or slave
1158 * @IFF_SLAVE_NEEDARP: need ARPs for validation
1159 * @IFF_ISATAP: ISATAP interface (RFC4214)
1160 * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
1161 * @IFF_WAN_HDLC: WAN HDLC device
1162 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1164 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1165 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1166 * @IFF_MACVLAN_PORT: device used as macvlan port
1167 * @IFF_BRIDGE_PORT: device used as bridge port
1168 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1169 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1170 * @IFF_UNICAST_FLT: Supports unicast filtering
1171 * @IFF_TEAM_PORT: device used as team port
1172 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1173 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1174 * change when it's running
1175 * @IFF_MACVLAN: Macvlan device
1177 enum netdev_priv_flags
{
1178 IFF_802_1Q_VLAN
= 1<<0,
1180 IFF_SLAVE_INACTIVE
= 1<<2,
1181 IFF_MASTER_8023AD
= 1<<3,
1182 IFF_MASTER_ALB
= 1<<4,
1184 IFF_SLAVE_NEEDARP
= 1<<6,
1186 IFF_MASTER_ARPMON
= 1<<8,
1187 IFF_WAN_HDLC
= 1<<9,
1188 IFF_XMIT_DST_RELEASE
= 1<<10,
1189 IFF_DONT_BRIDGE
= 1<<11,
1190 IFF_DISABLE_NETPOLL
= 1<<12,
1191 IFF_MACVLAN_PORT
= 1<<13,
1192 IFF_BRIDGE_PORT
= 1<<14,
1193 IFF_OVS_DATAPATH
= 1<<15,
1194 IFF_TX_SKB_SHARING
= 1<<16,
1195 IFF_UNICAST_FLT
= 1<<17,
1196 IFF_TEAM_PORT
= 1<<18,
1197 IFF_SUPP_NOFCS
= 1<<19,
1198 IFF_LIVE_ADDR_CHANGE
= 1<<20,
1199 IFF_MACVLAN
= 1<<21,
1202 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1203 #define IFF_EBRIDGE IFF_EBRIDGE
1204 #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE
1205 #define IFF_MASTER_8023AD IFF_MASTER_8023AD
1206 #define IFF_MASTER_ALB IFF_MASTER_ALB
1207 #define IFF_BONDING IFF_BONDING
1208 #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP
1209 #define IFF_ISATAP IFF_ISATAP
1210 #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON
1211 #define IFF_WAN_HDLC IFF_WAN_HDLC
1212 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1213 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1214 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1215 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1216 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1217 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1218 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1219 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1220 #define IFF_TEAM_PORT IFF_TEAM_PORT
1221 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1222 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1223 #define IFF_MACVLAN IFF_MACVLAN
1226 * The DEVICE structure.
1227 * Actually, this whole structure is a big mistake. It mixes I/O
1228 * data with strictly "high-level" data, and it has to know about
1229 * almost every data structure used in the INET module.
1231 * FIXME: cleanup struct net_device such that network protocol info
1238 * This is the first field of the "visible" part of this structure
1239 * (i.e. as seen by users in the "Space.c" file). It is the name
1242 char name
[IFNAMSIZ
];
1244 /* device name hash chain, please keep it close to name[] */
1245 struct hlist_node name_hlist
;
1251 * I/O specific fields
1252 * FIXME: Merge these and struct ifmap into one
1254 unsigned long mem_end
; /* shared mem end */
1255 unsigned long mem_start
; /* shared mem start */
1256 unsigned long base_addr
; /* device I/O address */
1257 int irq
; /* device IRQ number */
1260 * Some hardware also needs these fields, but they are not
1261 * part of the usual set specified in Space.c.
1264 unsigned long state
;
1266 struct list_head dev_list
;
1267 struct list_head napi_list
;
1268 struct list_head unreg_list
;
1269 struct list_head close_list
;
1271 /* directly linked devices, like slaves for bonding */
1273 struct list_head upper
;
1274 struct list_head lower
;
1277 /* all linked devices, *including* neighbours */
1279 struct list_head upper
;
1280 struct list_head lower
;
1284 /* currently active device features */
1285 netdev_features_t features
;
1286 /* user-changeable features */
1287 netdev_features_t hw_features
;
1288 /* user-requested features */
1289 netdev_features_t wanted_features
;
1290 /* mask of features inheritable by VLAN devices */
1291 netdev_features_t vlan_features
;
1292 /* mask of features inherited by encapsulating devices
1293 * This field indicates what encapsulation offloads
1294 * the hardware is capable of doing, and drivers will
1295 * need to set them appropriately.
1297 netdev_features_t hw_enc_features
;
1298 /* mask of fetures inheritable by MPLS */
1299 netdev_features_t mpls_features
;
1301 /* Interface index. Unique device identifier */
1305 struct net_device_stats stats
;
1307 /* dropped packets by core network, Do not use this in drivers */
1308 atomic_long_t rx_dropped
;
1309 atomic_long_t tx_dropped
;
1311 #ifdef CONFIG_WIRELESS_EXT
1312 /* List of functions to handle Wireless Extensions (instead of ioctl).
1313 * See <net/iw_handler.h> for details. Jean II */
1314 const struct iw_handler_def
* wireless_handlers
;
1315 /* Instance data managed by the core of Wireless Extensions. */
1316 struct iw_public_data
* wireless_data
;
1318 /* Management operations */
1319 const struct net_device_ops
*netdev_ops
;
1320 const struct ethtool_ops
*ethtool_ops
;
1321 const struct forwarding_accel_ops
*fwd_ops
;
1323 /* Hardware header description */
1324 const struct header_ops
*header_ops
;
1326 unsigned int flags
; /* interface flags (a la BSD) */
1327 unsigned int priv_flags
; /* Like 'flags' but invisible to userspace.
1328 * See if.h for definitions. */
1329 unsigned short gflags
;
1330 unsigned short padded
; /* How much padding added by alloc_netdev() */
1332 unsigned char operstate
; /* RFC2863 operstate */
1333 unsigned char link_mode
; /* mapping policy to operstate */
1335 unsigned char if_port
; /* Selectable AUI, TP,..*/
1336 unsigned char dma
; /* DMA channel */
1338 unsigned int mtu
; /* interface MTU value */
1339 unsigned short type
; /* interface hardware type */
1340 unsigned short hard_header_len
; /* hardware hdr length */
1342 /* extra head- and tailroom the hardware may need, but not in all cases
1343 * can this be guaranteed, especially tailroom. Some cases also use
1344 * LL_MAX_HEADER instead to allocate the skb.
1346 unsigned short needed_headroom
;
1347 unsigned short needed_tailroom
;
1349 /* Interface address info. */
1350 unsigned char perm_addr
[MAX_ADDR_LEN
]; /* permanent hw address */
1351 unsigned char addr_assign_type
; /* hw address assignment type */
1352 unsigned char addr_len
; /* hardware address length */
1353 unsigned short neigh_priv_len
;
1354 unsigned short dev_id
; /* Used to differentiate devices
1355 * that share the same link
1358 unsigned short dev_port
; /* Used to differentiate
1359 * devices that share the same
1362 spinlock_t addr_list_lock
;
1363 struct netdev_hw_addr_list uc
; /* Unicast mac addresses */
1364 struct netdev_hw_addr_list mc
; /* Multicast mac addresses */
1365 struct netdev_hw_addr_list dev_addrs
; /* list of device
1369 struct kset
*queues_kset
;
1373 unsigned int promiscuity
;
1374 unsigned int allmulti
;
1377 /* Protocol specific pointers */
1379 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1380 struct vlan_info __rcu
*vlan_info
; /* VLAN info */
1382 #if IS_ENABLED(CONFIG_NET_DSA)
1383 struct dsa_switch_tree
*dsa_ptr
; /* dsa specific data */
1385 #if IS_ENABLED(CONFIG_TIPC)
1386 struct tipc_bearer __rcu
*tipc_ptr
; /* TIPC specific data */
1388 void *atalk_ptr
; /* AppleTalk link */
1389 struct in_device __rcu
*ip_ptr
; /* IPv4 specific data */
1390 struct dn_dev __rcu
*dn_ptr
; /* DECnet specific data */
1391 struct inet6_dev __rcu
*ip6_ptr
; /* IPv6 specific data */
1392 void *ax25_ptr
; /* AX.25 specific data */
1393 struct wireless_dev
*ieee80211_ptr
; /* IEEE 802.11 specific data,
1394 assign before registering */
1397 * Cache lines mostly used on receive path (including eth_type_trans())
1399 unsigned long last_rx
; /* Time of last Rx */
1401 /* Interface address info used in eth_type_trans() */
1402 unsigned char *dev_addr
; /* hw address, (before bcast
1403 because most packets are
1408 struct netdev_rx_queue
*_rx
;
1410 /* Number of RX queues allocated at register_netdev() time */
1411 unsigned int num_rx_queues
;
1413 /* Number of RX queues currently active in device */
1414 unsigned int real_num_rx_queues
;
1418 rx_handler_func_t __rcu
*rx_handler
;
1419 void __rcu
*rx_handler_data
;
1421 struct netdev_queue __rcu
*ingress_queue
;
1422 unsigned char broadcast
[MAX_ADDR_LEN
]; /* hw bcast add */
1426 * Cache lines mostly used on transmit path
1428 struct netdev_queue
*_tx ____cacheline_aligned_in_smp
;
1430 /* Number of TX queues allocated at alloc_netdev_mq() time */
1431 unsigned int num_tx_queues
;
1433 /* Number of TX queues currently active in device */
1434 unsigned int real_num_tx_queues
;
1436 /* root qdisc from userspace point of view */
1437 struct Qdisc
*qdisc
;
1439 unsigned long tx_queue_len
; /* Max frames per queue allowed */
1440 spinlock_t tx_global_lock
;
1443 struct xps_dev_maps __rcu
*xps_maps
;
1445 #ifdef CONFIG_RFS_ACCEL
1446 /* CPU reverse-mapping for RX completion interrupts, indexed
1447 * by RX queue number. Assigned by driver. This must only be
1448 * set if the ndo_rx_flow_steer operation is defined. */
1449 struct cpu_rmap
*rx_cpu_rmap
;
1452 /* These may be needed for future network-power-down code. */
1455 * trans_start here is expensive for high speed devices on SMP,
1456 * please use netdev_queue->trans_start instead.
1458 unsigned long trans_start
; /* Time (in jiffies) of last Tx */
1460 int watchdog_timeo
; /* used by dev_watchdog() */
1461 struct timer_list watchdog_timer
;
1463 /* Number of references to this device */
1464 int __percpu
*pcpu_refcnt
;
1466 /* delayed register/unregister */
1467 struct list_head todo_list
;
1468 /* device index hash chain */
1469 struct hlist_node index_hlist
;
1471 struct list_head link_watch_list
;
1473 /* register/unregister state machine */
1474 enum { NETREG_UNINITIALIZED
=0,
1475 NETREG_REGISTERED
, /* completed register_netdevice */
1476 NETREG_UNREGISTERING
, /* called unregister_netdevice */
1477 NETREG_UNREGISTERED
, /* completed unregister todo */
1478 NETREG_RELEASED
, /* called free_netdev */
1479 NETREG_DUMMY
, /* dummy device for NAPI poll */
1482 bool dismantle
; /* device is going do be freed */
1485 RTNL_LINK_INITIALIZED
,
1486 RTNL_LINK_INITIALIZING
,
1487 } rtnl_link_state
:16;
1489 /* Called from unregister, can be used to call free_netdev */
1490 void (*destructor
)(struct net_device
*dev
);
1492 #ifdef CONFIG_NETPOLL
1493 struct netpoll_info __rcu
*npinfo
;
1496 #ifdef CONFIG_NET_NS
1497 /* Network namespace this network device is inside */
1501 /* mid-layer private */
1504 struct pcpu_lstats __percpu
*lstats
; /* loopback stats */
1505 struct pcpu_sw_netstats __percpu
*tstats
;
1506 struct pcpu_dstats __percpu
*dstats
; /* dummy stats */
1507 struct pcpu_vstats __percpu
*vstats
; /* veth stats */
1510 struct garp_port __rcu
*garp_port
;
1512 struct mrp_port __rcu
*mrp_port
;
1514 /* class/net/name entry */
1516 /* space for optional device, statistics, and wireless sysfs groups */
1517 const struct attribute_group
*sysfs_groups
[4];
1518 /* space for optional per-rx queue attributes */
1519 const struct attribute_group
*sysfs_rx_queue_group
;
1521 /* rtnetlink link ops */
1522 const struct rtnl_link_ops
*rtnl_link_ops
;
1524 /* for setting kernel sock attribute on TCP connection setup */
1525 #define GSO_MAX_SIZE 65536
1526 unsigned int gso_max_size
;
1527 #define GSO_MAX_SEGS 65535
1531 /* Data Center Bridging netlink ops */
1532 const struct dcbnl_rtnl_ops
*dcbnl_ops
;
1535 struct netdev_tc_txq tc_to_txq
[TC_MAX_QUEUE
];
1536 u8 prio_tc_map
[TC_BITMASK
+ 1];
1538 #if IS_ENABLED(CONFIG_FCOE)
1539 /* max exchange id for FCoE LRO by ddp */
1540 unsigned int fcoe_ddp_xid
;
1542 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1543 struct netprio_map __rcu
*priomap
;
1545 /* phy device may attach itself for hardware timestamping */
1546 struct phy_device
*phydev
;
1548 struct lock_class_key
*qdisc_tx_busylock
;
1550 /* group the device belongs to */
1553 struct pm_qos_request pm_qos_req
;
1555 #define to_net_dev(d) container_of(d, struct net_device, dev)
1557 #define NETDEV_ALIGN 32
1560 int netdev_get_prio_tc_map(const struct net_device
*dev
, u32 prio
)
1562 return dev
->prio_tc_map
[prio
& TC_BITMASK
];
1566 int netdev_set_prio_tc_map(struct net_device
*dev
, u8 prio
, u8 tc
)
1568 if (tc
>= dev
->num_tc
)
1571 dev
->prio_tc_map
[prio
& TC_BITMASK
] = tc
& TC_BITMASK
;
1576 void netdev_reset_tc(struct net_device
*dev
)
1579 memset(dev
->tc_to_txq
, 0, sizeof(dev
->tc_to_txq
));
1580 memset(dev
->prio_tc_map
, 0, sizeof(dev
->prio_tc_map
));
1584 int netdev_set_tc_queue(struct net_device
*dev
, u8 tc
, u16 count
, u16 offset
)
1586 if (tc
>= dev
->num_tc
)
1589 dev
->tc_to_txq
[tc
].count
= count
;
1590 dev
->tc_to_txq
[tc
].offset
= offset
;
1595 int netdev_set_num_tc(struct net_device
*dev
, u8 num_tc
)
1597 if (num_tc
> TC_MAX_QUEUE
)
1600 dev
->num_tc
= num_tc
;
1605 int netdev_get_num_tc(struct net_device
*dev
)
1611 struct netdev_queue
*netdev_get_tx_queue(const struct net_device
*dev
,
1614 return &dev
->_tx
[index
];
1617 static inline void netdev_for_each_tx_queue(struct net_device
*dev
,
1618 void (*f
)(struct net_device
*,
1619 struct netdev_queue
*,
1625 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
1626 f(dev
, &dev
->_tx
[i
], arg
);
1629 struct netdev_queue
*netdev_pick_tx(struct net_device
*dev
,
1630 struct sk_buff
*skb
,
1634 * Net namespace inlines
1637 struct net
*dev_net(const struct net_device
*dev
)
1639 return read_pnet(&dev
->nd_net
);
1643 void dev_net_set(struct net_device
*dev
, struct net
*net
)
1645 #ifdef CONFIG_NET_NS
1646 release_net(dev
->nd_net
);
1647 dev
->nd_net
= hold_net(net
);
1651 static inline bool netdev_uses_dsa_tags(struct net_device
*dev
)
1653 #ifdef CONFIG_NET_DSA_TAG_DSA
1654 if (dev
->dsa_ptr
!= NULL
)
1655 return dsa_uses_dsa_tags(dev
->dsa_ptr
);
1661 static inline bool netdev_uses_trailer_tags(struct net_device
*dev
)
1663 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1664 if (dev
->dsa_ptr
!= NULL
)
1665 return dsa_uses_trailer_tags(dev
->dsa_ptr
);
1672 * netdev_priv - access network device private data
1673 * @dev: network device
1675 * Get network device private data
1677 static inline void *netdev_priv(const struct net_device
*dev
)
1679 return (char *)dev
+ ALIGN(sizeof(struct net_device
), NETDEV_ALIGN
);
1682 /* Set the sysfs physical device reference for the network logical device
1683 * if set prior to registration will cause a symlink during initialization.
1685 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1687 /* Set the sysfs device type for the network logical device to allow
1688 * fine-grained identification of different network device types. For
1689 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1691 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1693 /* Default NAPI poll() weight
1694 * Device drivers are strongly advised to not use bigger value
1696 #define NAPI_POLL_WEIGHT 64
1699 * netif_napi_add - initialize a napi context
1700 * @dev: network device
1701 * @napi: napi context
1702 * @poll: polling function
1703 * @weight: default weight
1705 * netif_napi_add() must be used to initialize a napi context prior to calling
1706 * *any* of the other napi related functions.
1708 void netif_napi_add(struct net_device
*dev
, struct napi_struct
*napi
,
1709 int (*poll
)(struct napi_struct
*, int), int weight
);
1712 * netif_napi_del - remove a napi context
1713 * @napi: napi context
1715 * netif_napi_del() removes a napi context from the network device napi list
1717 void netif_napi_del(struct napi_struct
*napi
);
1719 struct napi_gro_cb
{
1720 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1723 /* Length of frag0. */
1724 unsigned int frag0_len
;
1726 /* This indicates where we are processing relative to skb->data. */
1729 /* This is non-zero if the packet cannot be merged with the new skb. */
1732 /* Save the IP ID here and check when we get to the transport layer */
1735 /* Number of segments aggregated. */
1738 /* This is non-zero if the packet may be of the same flow. */
1743 #define NAPI_GRO_FREE 1
1744 #define NAPI_GRO_FREE_STOLEN_HEAD 2
1746 /* jiffies when first packet was created/queued */
1749 /* Used in ipv6_gro_receive() */
1752 /* Used in udp_gro_receive */
1755 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
1758 /* used in skb_gro_receive() slow path */
1759 struct sk_buff
*last
;
1762 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1764 struct packet_type
{
1765 __be16 type
; /* This is really htons(ether_type). */
1766 struct net_device
*dev
; /* NULL is wildcarded here */
1767 int (*func
) (struct sk_buff
*,
1768 struct net_device
*,
1769 struct packet_type
*,
1770 struct net_device
*);
1771 bool (*id_match
)(struct packet_type
*ptype
,
1773 void *af_packet_priv
;
1774 struct list_head list
;
1777 struct offload_callbacks
{
1778 struct sk_buff
*(*gso_segment
)(struct sk_buff
*skb
,
1779 netdev_features_t features
);
1780 int (*gso_send_check
)(struct sk_buff
*skb
);
1781 struct sk_buff
**(*gro_receive
)(struct sk_buff
**head
,
1782 struct sk_buff
*skb
);
1783 int (*gro_complete
)(struct sk_buff
*skb
, int nhoff
);
1786 struct packet_offload
{
1787 __be16 type
; /* This is really htons(ether_type). */
1788 struct offload_callbacks callbacks
;
1789 struct list_head list
;
1792 struct udp_offload
{
1794 struct offload_callbacks callbacks
;
1797 /* often modified stats are per cpu, other are shared (netdev->stats) */
1798 struct pcpu_sw_netstats
{
1803 struct u64_stats_sync syncp
;
1806 #define netdev_alloc_pcpu_stats(type) \
1808 typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
1811 for_each_possible_cpu(i) { \
1812 typeof(type) *stat; \
1813 stat = per_cpu_ptr(pcpu_stats, i); \
1814 u64_stats_init(&stat->syncp); \
1820 #include <linux/notifier.h>
1822 /* netdevice notifier chain. Please remember to update the rtnetlink
1823 * notification exclusion list in rtnetlink_event() when adding new
1826 #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1827 #define NETDEV_DOWN 0x0002
1828 #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1829 detected a hardware crash and restarted
1830 - we can use this eg to kick tcp sessions
1832 #define NETDEV_CHANGE 0x0004 /* Notify device state change */
1833 #define NETDEV_REGISTER 0x0005
1834 #define NETDEV_UNREGISTER 0x0006
1835 #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
1836 #define NETDEV_CHANGEADDR 0x0008
1837 #define NETDEV_GOING_DOWN 0x0009
1838 #define NETDEV_CHANGENAME 0x000A
1839 #define NETDEV_FEAT_CHANGE 0x000B
1840 #define NETDEV_BONDING_FAILOVER 0x000C
1841 #define NETDEV_PRE_UP 0x000D
1842 #define NETDEV_PRE_TYPE_CHANGE 0x000E
1843 #define NETDEV_POST_TYPE_CHANGE 0x000F
1844 #define NETDEV_POST_INIT 0x0010
1845 #define NETDEV_UNREGISTER_FINAL 0x0011
1846 #define NETDEV_RELEASE 0x0012
1847 #define NETDEV_NOTIFY_PEERS 0x0013
1848 #define NETDEV_JOIN 0x0014
1849 #define NETDEV_CHANGEUPPER 0x0015
1850 #define NETDEV_RESEND_IGMP 0x0016
1851 #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
1853 int register_netdevice_notifier(struct notifier_block
*nb
);
1854 int unregister_netdevice_notifier(struct notifier_block
*nb
);
1856 struct netdev_notifier_info
{
1857 struct net_device
*dev
;
1860 struct netdev_notifier_change_info
{
1861 struct netdev_notifier_info info
; /* must be first */
1862 unsigned int flags_changed
;
1865 static inline void netdev_notifier_info_init(struct netdev_notifier_info
*info
,
1866 struct net_device
*dev
)
1871 static inline struct net_device
*
1872 netdev_notifier_info_to_dev(const struct netdev_notifier_info
*info
)
1877 int call_netdevice_notifiers(unsigned long val
, struct net_device
*dev
);
1880 extern rwlock_t dev_base_lock
; /* Device list lock */
1882 #define for_each_netdev(net, d) \
1883 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1884 #define for_each_netdev_reverse(net, d) \
1885 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1886 #define for_each_netdev_rcu(net, d) \
1887 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1888 #define for_each_netdev_safe(net, d, n) \
1889 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1890 #define for_each_netdev_continue(net, d) \
1891 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1892 #define for_each_netdev_continue_rcu(net, d) \
1893 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1894 #define for_each_netdev_in_bond_rcu(bond, slave) \
1895 for_each_netdev_rcu(&init_net, slave) \
1896 if (netdev_master_upper_dev_get_rcu(slave) == bond)
1897 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1899 static inline struct net_device
*next_net_device(struct net_device
*dev
)
1901 struct list_head
*lh
;
1905 lh
= dev
->dev_list
.next
;
1906 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1909 static inline struct net_device
*next_net_device_rcu(struct net_device
*dev
)
1911 struct list_head
*lh
;
1915 lh
= rcu_dereference(list_next_rcu(&dev
->dev_list
));
1916 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1919 static inline struct net_device
*first_net_device(struct net
*net
)
1921 return list_empty(&net
->dev_base_head
) ? NULL
:
1922 net_device_entry(net
->dev_base_head
.next
);
1925 static inline struct net_device
*first_net_device_rcu(struct net
*net
)
1927 struct list_head
*lh
= rcu_dereference(list_next_rcu(&net
->dev_base_head
));
1929 return lh
== &net
->dev_base_head
? NULL
: net_device_entry(lh
);
1932 int netdev_boot_setup_check(struct net_device
*dev
);
1933 unsigned long netdev_boot_base(const char *prefix
, int unit
);
1934 struct net_device
*dev_getbyhwaddr_rcu(struct net
*net
, unsigned short type
,
1935 const char *hwaddr
);
1936 struct net_device
*dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1937 struct net_device
*__dev_getfirstbyhwtype(struct net
*net
, unsigned short type
);
1938 void dev_add_pack(struct packet_type
*pt
);
1939 void dev_remove_pack(struct packet_type
*pt
);
1940 void __dev_remove_pack(struct packet_type
*pt
);
1941 void dev_add_offload(struct packet_offload
*po
);
1942 void dev_remove_offload(struct packet_offload
*po
);
1944 struct net_device
*dev_get_by_flags_rcu(struct net
*net
, unsigned short flags
,
1945 unsigned short mask
);
1946 struct net_device
*dev_get_by_name(struct net
*net
, const char *name
);
1947 struct net_device
*dev_get_by_name_rcu(struct net
*net
, const char *name
);
1948 struct net_device
*__dev_get_by_name(struct net
*net
, const char *name
);
1949 int dev_alloc_name(struct net_device
*dev
, const char *name
);
1950 int dev_open(struct net_device
*dev
);
1951 int dev_close(struct net_device
*dev
);
1952 void dev_disable_lro(struct net_device
*dev
);
1953 int dev_loopback_xmit(struct sk_buff
*newskb
);
1954 int dev_queue_xmit(struct sk_buff
*skb
);
1955 int dev_queue_xmit_accel(struct sk_buff
*skb
, void *accel_priv
);
1956 int register_netdevice(struct net_device
*dev
);
1957 void unregister_netdevice_queue(struct net_device
*dev
, struct list_head
*head
);
1958 void unregister_netdevice_many(struct list_head
*head
);
1959 static inline void unregister_netdevice(struct net_device
*dev
)
1961 unregister_netdevice_queue(dev
, NULL
);
1964 int netdev_refcnt_read(const struct net_device
*dev
);
1965 void free_netdev(struct net_device
*dev
);
1966 void netdev_freemem(struct net_device
*dev
);
1967 void synchronize_net(void);
1968 int init_dummy_netdev(struct net_device
*dev
);
1970 struct net_device
*dev_get_by_index(struct net
*net
, int ifindex
);
1971 struct net_device
*__dev_get_by_index(struct net
*net
, int ifindex
);
1972 struct net_device
*dev_get_by_index_rcu(struct net
*net
, int ifindex
);
1973 int netdev_get_name(struct net
*net
, char *name
, int ifindex
);
1974 int dev_restart(struct net_device
*dev
);
1975 int skb_gro_receive(struct sk_buff
**head
, struct sk_buff
*skb
);
1977 static inline unsigned int skb_gro_offset(const struct sk_buff
*skb
)
1979 return NAPI_GRO_CB(skb
)->data_offset
;
1982 static inline unsigned int skb_gro_len(const struct sk_buff
*skb
)
1984 return skb
->len
- NAPI_GRO_CB(skb
)->data_offset
;
1987 static inline void skb_gro_pull(struct sk_buff
*skb
, unsigned int len
)
1989 NAPI_GRO_CB(skb
)->data_offset
+= len
;
1992 static inline void *skb_gro_header_fast(struct sk_buff
*skb
,
1993 unsigned int offset
)
1995 return NAPI_GRO_CB(skb
)->frag0
+ offset
;
1998 static inline int skb_gro_header_hard(struct sk_buff
*skb
, unsigned int hlen
)
2000 return NAPI_GRO_CB(skb
)->frag0_len
< hlen
;
2003 static inline void *skb_gro_header_slow(struct sk_buff
*skb
, unsigned int hlen
,
2004 unsigned int offset
)
2006 if (!pskb_may_pull(skb
, hlen
))
2009 NAPI_GRO_CB(skb
)->frag0
= NULL
;
2010 NAPI_GRO_CB(skb
)->frag0_len
= 0;
2011 return skb
->data
+ offset
;
2014 static inline void *skb_gro_mac_header(struct sk_buff
*skb
)
2016 return NAPI_GRO_CB(skb
)->frag0
?: skb_mac_header(skb
);
2019 static inline void *skb_gro_network_header(struct sk_buff
*skb
)
2021 return (NAPI_GRO_CB(skb
)->frag0
?: skb
->data
) +
2022 skb_network_offset(skb
);
2025 static inline void skb_gro_postpull_rcsum(struct sk_buff
*skb
,
2026 const void *start
, unsigned int len
)
2028 if (skb
->ip_summed
== CHECKSUM_COMPLETE
)
2029 NAPI_GRO_CB(skb
)->csum
= csum_sub(NAPI_GRO_CB(skb
)->csum
,
2030 csum_partial(start
, len
, 0));
2033 static inline int dev_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
2034 unsigned short type
,
2035 const void *daddr
, const void *saddr
,
2038 if (!dev
->header_ops
|| !dev
->header_ops
->create
)
2041 return dev
->header_ops
->create(skb
, dev
, type
, daddr
, saddr
, len
);
2044 static inline int dev_parse_header(const struct sk_buff
*skb
,
2045 unsigned char *haddr
)
2047 const struct net_device
*dev
= skb
->dev
;
2049 if (!dev
->header_ops
|| !dev
->header_ops
->parse
)
2051 return dev
->header_ops
->parse(skb
, haddr
);
2054 static inline int dev_rebuild_header(struct sk_buff
*skb
)
2056 const struct net_device
*dev
= skb
->dev
;
2058 if (!dev
->header_ops
|| !dev
->header_ops
->rebuild
)
2060 return dev
->header_ops
->rebuild(skb
);
2063 typedef int gifconf_func_t(struct net_device
* dev
, char __user
* bufptr
, int len
);
2064 int register_gifconf(unsigned int family
, gifconf_func_t
*gifconf
);
2065 static inline int unregister_gifconf(unsigned int family
)
2067 return register_gifconf(family
, NULL
);
2070 #ifdef CONFIG_NET_FLOW_LIMIT
2071 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
2072 struct sd_flow_limit
{
2074 unsigned int num_buckets
;
2075 unsigned int history_head
;
2076 u16 history
[FLOW_LIMIT_HISTORY
];
2080 extern int netdev_flow_limit_table_len
;
2081 #endif /* CONFIG_NET_FLOW_LIMIT */
2084 * Incoming packets are placed on per-cpu queues
2086 struct softnet_data
{
2087 struct Qdisc
*output_queue
;
2088 struct Qdisc
**output_queue_tailp
;
2089 struct list_head poll_list
;
2090 struct sk_buff
*completion_queue
;
2091 struct sk_buff_head process_queue
;
2094 unsigned int processed
;
2095 unsigned int time_squeeze
;
2096 unsigned int cpu_collision
;
2097 unsigned int received_rps
;
2100 struct softnet_data
*rps_ipi_list
;
2102 /* Elements below can be accessed between CPUs for RPS */
2103 struct call_single_data csd ____cacheline_aligned_in_smp
;
2104 struct softnet_data
*rps_ipi_next
;
2106 unsigned int input_queue_head
;
2107 unsigned int input_queue_tail
;
2109 unsigned int dropped
;
2110 struct sk_buff_head input_pkt_queue
;
2111 struct napi_struct backlog
;
2113 #ifdef CONFIG_NET_FLOW_LIMIT
2114 struct sd_flow_limit __rcu
*flow_limit
;
2118 static inline void input_queue_head_incr(struct softnet_data
*sd
)
2121 sd
->input_queue_head
++;
2125 static inline void input_queue_tail_incr_save(struct softnet_data
*sd
,
2126 unsigned int *qtail
)
2129 *qtail
= ++sd
->input_queue_tail
;
2133 DECLARE_PER_CPU_ALIGNED(struct softnet_data
, softnet_data
);
2135 void __netif_schedule(struct Qdisc
*q
);
2137 static inline void netif_schedule_queue(struct netdev_queue
*txq
)
2139 if (!(txq
->state
& QUEUE_STATE_ANY_XOFF
))
2140 __netif_schedule(txq
->qdisc
);
2143 static inline void netif_tx_schedule_all(struct net_device
*dev
)
2147 for (i
= 0; i
< dev
->num_tx_queues
; i
++)
2148 netif_schedule_queue(netdev_get_tx_queue(dev
, i
));
2151 static inline void netif_tx_start_queue(struct netdev_queue
*dev_queue
)
2153 clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2157 * netif_start_queue - allow transmit
2158 * @dev: network device
2160 * Allow upper layers to call the device hard_start_xmit routine.
2162 static inline void netif_start_queue(struct net_device
*dev
)
2164 netif_tx_start_queue(netdev_get_tx_queue(dev
, 0));
2167 static inline void netif_tx_start_all_queues(struct net_device
*dev
)
2171 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2172 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2173 netif_tx_start_queue(txq
);
2177 static inline void netif_tx_wake_queue(struct netdev_queue
*dev_queue
)
2179 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
))
2180 __netif_schedule(dev_queue
->qdisc
);
2184 * netif_wake_queue - restart transmit
2185 * @dev: network device
2187 * Allow upper layers to call the device hard_start_xmit routine.
2188 * Used for flow control when transmit resources are available.
2190 static inline void netif_wake_queue(struct net_device
*dev
)
2192 netif_tx_wake_queue(netdev_get_tx_queue(dev
, 0));
2195 static inline void netif_tx_wake_all_queues(struct net_device
*dev
)
2199 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2200 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2201 netif_tx_wake_queue(txq
);
2205 static inline void netif_tx_stop_queue(struct netdev_queue
*dev_queue
)
2207 if (WARN_ON(!dev_queue
)) {
2208 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
2211 set_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2215 * netif_stop_queue - stop transmitted packets
2216 * @dev: network device
2218 * Stop upper layers calling the device hard_start_xmit routine.
2219 * Used for flow control when transmit resources are unavailable.
2221 static inline void netif_stop_queue(struct net_device
*dev
)
2223 netif_tx_stop_queue(netdev_get_tx_queue(dev
, 0));
2226 static inline void netif_tx_stop_all_queues(struct net_device
*dev
)
2230 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2231 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2232 netif_tx_stop_queue(txq
);
2236 static inline bool netif_tx_queue_stopped(const struct netdev_queue
*dev_queue
)
2238 return test_bit(__QUEUE_STATE_DRV_XOFF
, &dev_queue
->state
);
2242 * netif_queue_stopped - test if transmit queue is flowblocked
2243 * @dev: network device
2245 * Test if transmit queue on device is currently unable to send.
2247 static inline bool netif_queue_stopped(const struct net_device
*dev
)
2249 return netif_tx_queue_stopped(netdev_get_tx_queue(dev
, 0));
2252 static inline bool netif_xmit_stopped(const struct netdev_queue
*dev_queue
)
2254 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF
;
2257 static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue
*dev_queue
)
2259 return dev_queue
->state
& QUEUE_STATE_ANY_XOFF_OR_FROZEN
;
2262 static inline void netdev_tx_sent_queue(struct netdev_queue
*dev_queue
,
2266 dql_queued(&dev_queue
->dql
, bytes
);
2268 if (likely(dql_avail(&dev_queue
->dql
) >= 0))
2271 set_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2274 * The XOFF flag must be set before checking the dql_avail below,
2275 * because in netdev_tx_completed_queue we update the dql_completed
2276 * before checking the XOFF flag.
2280 /* check again in case another CPU has just made room avail */
2281 if (unlikely(dql_avail(&dev_queue
->dql
) >= 0))
2282 clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
);
2287 * netdev_sent_queue - report the number of bytes queued to hardware
2288 * @dev: network device
2289 * @bytes: number of bytes queued to the hardware device queue
2291 * Report the number of bytes queued for sending/completion to the network
2292 * device hardware queue. @bytes should be a good approximation and should
2293 * exactly match netdev_completed_queue() @bytes
2295 static inline void netdev_sent_queue(struct net_device
*dev
, unsigned int bytes
)
2297 netdev_tx_sent_queue(netdev_get_tx_queue(dev
, 0), bytes
);
2300 static inline void netdev_tx_completed_queue(struct netdev_queue
*dev_queue
,
2301 unsigned int pkts
, unsigned int bytes
)
2304 if (unlikely(!bytes
))
2307 dql_completed(&dev_queue
->dql
, bytes
);
2310 * Without the memory barrier there is a small possiblity that
2311 * netdev_tx_sent_queue will miss the update and cause the queue to
2312 * be stopped forever
2316 if (dql_avail(&dev_queue
->dql
) < 0)
2319 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF
, &dev_queue
->state
))
2320 netif_schedule_queue(dev_queue
);
2325 * netdev_completed_queue - report bytes and packets completed by device
2326 * @dev: network device
2327 * @pkts: actual number of packets sent over the medium
2328 * @bytes: actual number of bytes sent over the medium
2330 * Report the number of bytes and packets transmitted by the network device
2331 * hardware queue over the physical medium, @bytes must exactly match the
2332 * @bytes amount passed to netdev_sent_queue()
2334 static inline void netdev_completed_queue(struct net_device
*dev
,
2335 unsigned int pkts
, unsigned int bytes
)
2337 netdev_tx_completed_queue(netdev_get_tx_queue(dev
, 0), pkts
, bytes
);
2340 static inline void netdev_tx_reset_queue(struct netdev_queue
*q
)
2343 clear_bit(__QUEUE_STATE_STACK_XOFF
, &q
->state
);
2349 * netdev_reset_queue - reset the packets and bytes count of a network device
2350 * @dev_queue: network device
2352 * Reset the bytes and packet count of a network device and clear the
2353 * software flow control OFF bit for this network device
2355 static inline void netdev_reset_queue(struct net_device
*dev_queue
)
2357 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue
, 0));
2361 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
2362 * @dev: network device
2363 * @queue_index: given tx queue index
2365 * Returns 0 if given tx queue index >= number of device tx queues,
2366 * otherwise returns the originally passed tx queue index.
2368 static inline u16
netdev_cap_txqueue(struct net_device
*dev
, u16 queue_index
)
2370 if (unlikely(queue_index
>= dev
->real_num_tx_queues
)) {
2371 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
2372 dev
->name
, queue_index
,
2373 dev
->real_num_tx_queues
);
2381 * netif_running - test if up
2382 * @dev: network device
2384 * Test if the device has been brought up.
2386 static inline bool netif_running(const struct net_device
*dev
)
2388 return test_bit(__LINK_STATE_START
, &dev
->state
);
2392 * Routines to manage the subqueues on a device. We only need start
2393 * stop, and a check if it's stopped. All other device management is
2394 * done at the overall netdevice level.
2395 * Also test the device if we're multiqueue.
2399 * netif_start_subqueue - allow sending packets on subqueue
2400 * @dev: network device
2401 * @queue_index: sub queue index
2403 * Start individual transmit queue of a device with multiple transmit queues.
2405 static inline void netif_start_subqueue(struct net_device
*dev
, u16 queue_index
)
2407 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2409 netif_tx_start_queue(txq
);
2413 * netif_stop_subqueue - stop sending packets on subqueue
2414 * @dev: network device
2415 * @queue_index: sub queue index
2417 * Stop individual transmit queue of a device with multiple transmit queues.
2419 static inline void netif_stop_subqueue(struct net_device
*dev
, u16 queue_index
)
2421 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2422 netif_tx_stop_queue(txq
);
2426 * netif_subqueue_stopped - test status of subqueue
2427 * @dev: network device
2428 * @queue_index: sub queue index
2430 * Check individual transmit queue of a device with multiple transmit queues.
2432 static inline bool __netif_subqueue_stopped(const struct net_device
*dev
,
2435 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2437 return netif_tx_queue_stopped(txq
);
2440 static inline bool netif_subqueue_stopped(const struct net_device
*dev
,
2441 struct sk_buff
*skb
)
2443 return __netif_subqueue_stopped(dev
, skb_get_queue_mapping(skb
));
2447 * netif_wake_subqueue - allow sending packets on subqueue
2448 * @dev: network device
2449 * @queue_index: sub queue index
2451 * Resume individual transmit queue of a device with multiple transmit queues.
2453 static inline void netif_wake_subqueue(struct net_device
*dev
, u16 queue_index
)
2455 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, queue_index
);
2456 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF
, &txq
->state
))
2457 __netif_schedule(txq
->qdisc
);
2461 int netif_set_xps_queue(struct net_device
*dev
, const struct cpumask
*mask
,
2464 static inline int netif_set_xps_queue(struct net_device
*dev
,
2465 const struct cpumask
*mask
,
2473 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
2474 * as a distribution range limit for the returned value.
2476 static inline u16
skb_tx_hash(const struct net_device
*dev
,
2477 const struct sk_buff
*skb
)
2479 return __skb_tx_hash(dev
, skb
, dev
->real_num_tx_queues
);
2483 * netif_is_multiqueue - test if device has multiple transmit queues
2484 * @dev: network device
2486 * Check if device has multiple transmit queues
2488 static inline bool netif_is_multiqueue(const struct net_device
*dev
)
2490 return dev
->num_tx_queues
> 1;
2493 int netif_set_real_num_tx_queues(struct net_device
*dev
, unsigned int txq
);
2496 int netif_set_real_num_rx_queues(struct net_device
*dev
, unsigned int rxq
);
2498 static inline int netif_set_real_num_rx_queues(struct net_device
*dev
,
2505 static inline int netif_copy_real_num_queues(struct net_device
*to_dev
,
2506 const struct net_device
*from_dev
)
2510 err
= netif_set_real_num_tx_queues(to_dev
,
2511 from_dev
->real_num_tx_queues
);
2515 return netif_set_real_num_rx_queues(to_dev
,
2516 from_dev
->real_num_rx_queues
);
2523 static inline unsigned int get_netdev_rx_queue_index(
2524 struct netdev_rx_queue
*queue
)
2526 struct net_device
*dev
= queue
->dev
;
2527 int index
= queue
- dev
->_rx
;
2529 BUG_ON(index
>= dev
->num_rx_queues
);
2534 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
2535 int netif_get_num_default_rss_queues(void);
2537 enum skb_free_reason
{
2538 SKB_REASON_CONSUMED
,
2542 void __dev_kfree_skb_irq(struct sk_buff
*skb
, enum skb_free_reason reason
);
2543 void __dev_kfree_skb_any(struct sk_buff
*skb
, enum skb_free_reason reason
);
2546 * It is not allowed to call kfree_skb() or consume_skb() from hardware
2547 * interrupt context or with hardware interrupts being disabled.
2548 * (in_irq() || irqs_disabled())
2550 * We provide four helpers that can be used in following contexts :
2552 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
2553 * replacing kfree_skb(skb)
2555 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
2556 * Typically used in place of consume_skb(skb) in TX completion path
2558 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
2559 * replacing kfree_skb(skb)
2561 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
2562 * and consumed a packet. Used in place of consume_skb(skb)
2564 static inline void dev_kfree_skb_irq(struct sk_buff
*skb
)
2566 __dev_kfree_skb_irq(skb
, SKB_REASON_DROPPED
);
2569 static inline void dev_consume_skb_irq(struct sk_buff
*skb
)
2571 __dev_kfree_skb_irq(skb
, SKB_REASON_CONSUMED
);
2574 static inline void dev_kfree_skb_any(struct sk_buff
*skb
)
2576 __dev_kfree_skb_any(skb
, SKB_REASON_DROPPED
);
2579 static inline void dev_consume_skb_any(struct sk_buff
*skb
)
2581 __dev_kfree_skb_any(skb
, SKB_REASON_CONSUMED
);
2584 int netif_rx(struct sk_buff
*skb
);
2585 int netif_rx_ni(struct sk_buff
*skb
);
2586 int netif_receive_skb(struct sk_buff
*skb
);
2587 gro_result_t
napi_gro_receive(struct napi_struct
*napi
, struct sk_buff
*skb
);
2588 void napi_gro_flush(struct napi_struct
*napi
, bool flush_old
);
2589 struct sk_buff
*napi_get_frags(struct napi_struct
*napi
);
2590 gro_result_t
napi_gro_frags(struct napi_struct
*napi
);
2591 struct packet_offload
*gro_find_receive_by_type(__be16 type
);
2592 struct packet_offload
*gro_find_complete_by_type(__be16 type
);
2594 static inline void napi_free_frags(struct napi_struct
*napi
)
2596 kfree_skb(napi
->skb
);
2600 int netdev_rx_handler_register(struct net_device
*dev
,
2601 rx_handler_func_t
*rx_handler
,
2602 void *rx_handler_data
);
2603 void netdev_rx_handler_unregister(struct net_device
*dev
);
2605 bool dev_valid_name(const char *name
);
2606 int dev_ioctl(struct net
*net
, unsigned int cmd
, void __user
*);
2607 int dev_ethtool(struct net
*net
, struct ifreq
*);
2608 unsigned int dev_get_flags(const struct net_device
*);
2609 int __dev_change_flags(struct net_device
*, unsigned int flags
);
2610 int dev_change_flags(struct net_device
*, unsigned int);
2611 void __dev_notify_flags(struct net_device
*, unsigned int old_flags
,
2612 unsigned int gchanges
);
2613 int dev_change_name(struct net_device
*, const char *);
2614 int dev_set_alias(struct net_device
*, const char *, size_t);
2615 int dev_change_net_namespace(struct net_device
*, struct net
*, const char *);
2616 int dev_set_mtu(struct net_device
*, int);
2617 void dev_set_group(struct net_device
*, int);
2618 int dev_set_mac_address(struct net_device
*, struct sockaddr
*);
2619 int dev_change_carrier(struct net_device
*, bool new_carrier
);
2620 int dev_get_phys_port_id(struct net_device
*dev
,
2621 struct netdev_phys_port_id
*ppid
);
2622 int dev_hard_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
,
2623 struct netdev_queue
*txq
);
2624 int dev_forward_skb(struct net_device
*dev
, struct sk_buff
*skb
);
2625 bool is_skb_forwardable(struct net_device
*dev
, struct sk_buff
*skb
);
2627 extern int netdev_budget
;
2629 /* Called by rtnetlink.c:rtnl_unlock() */
2630 void netdev_run_todo(void);
2633 * dev_put - release reference to device
2634 * @dev: network device
2636 * Release reference to device to allow it to be freed.
2638 static inline void dev_put(struct net_device
*dev
)
2640 this_cpu_dec(*dev
->pcpu_refcnt
);
2644 * dev_hold - get reference to device
2645 * @dev: network device
2647 * Hold reference to device to keep it from being freed.
2649 static inline void dev_hold(struct net_device
*dev
)
2651 this_cpu_inc(*dev
->pcpu_refcnt
);
2654 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
2655 * and _off may be called from IRQ context, but it is caller
2656 * who is responsible for serialization of these calls.
2658 * The name carrier is inappropriate, these functions should really be
2659 * called netif_lowerlayer_*() because they represent the state of any
2660 * kind of lower layer not just hardware media.
2663 void linkwatch_init_dev(struct net_device
*dev
);
2664 void linkwatch_fire_event(struct net_device
*dev
);
2665 void linkwatch_forget_dev(struct net_device
*dev
);
2668 * netif_carrier_ok - test if carrier present
2669 * @dev: network device
2671 * Check if carrier is present on device
2673 static inline bool netif_carrier_ok(const struct net_device
*dev
)
2675 return !test_bit(__LINK_STATE_NOCARRIER
, &dev
->state
);
2678 unsigned long dev_trans_start(struct net_device
*dev
);
2680 void __netdev_watchdog_up(struct net_device
*dev
);
2682 void netif_carrier_on(struct net_device
*dev
);
2684 void netif_carrier_off(struct net_device
*dev
);
2687 * netif_dormant_on - mark device as dormant.
2688 * @dev: network device
2690 * Mark device as dormant (as per RFC2863).
2692 * The dormant state indicates that the relevant interface is not
2693 * actually in a condition to pass packets (i.e., it is not 'up') but is
2694 * in a "pending" state, waiting for some external event. For "on-
2695 * demand" interfaces, this new state identifies the situation where the
2696 * interface is waiting for events to place it in the up state.
2699 static inline void netif_dormant_on(struct net_device
*dev
)
2701 if (!test_and_set_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2702 linkwatch_fire_event(dev
);
2706 * netif_dormant_off - set device as not dormant.
2707 * @dev: network device
2709 * Device is not in dormant state.
2711 static inline void netif_dormant_off(struct net_device
*dev
)
2713 if (test_and_clear_bit(__LINK_STATE_DORMANT
, &dev
->state
))
2714 linkwatch_fire_event(dev
);
2718 * netif_dormant - test if carrier present
2719 * @dev: network device
2721 * Check if carrier is present on device
2723 static inline bool netif_dormant(const struct net_device
*dev
)
2725 return test_bit(__LINK_STATE_DORMANT
, &dev
->state
);
2730 * netif_oper_up - test if device is operational
2731 * @dev: network device
2733 * Check if carrier is operational
2735 static inline bool netif_oper_up(const struct net_device
*dev
)
2737 return (dev
->operstate
== IF_OPER_UP
||
2738 dev
->operstate
== IF_OPER_UNKNOWN
/* backward compat */);
2742 * netif_device_present - is device available or removed
2743 * @dev: network device
2745 * Check if device has not been removed from system.
2747 static inline bool netif_device_present(struct net_device
*dev
)
2749 return test_bit(__LINK_STATE_PRESENT
, &dev
->state
);
2752 void netif_device_detach(struct net_device
*dev
);
2754 void netif_device_attach(struct net_device
*dev
);
2757 * Network interface message level settings
2761 NETIF_MSG_DRV
= 0x0001,
2762 NETIF_MSG_PROBE
= 0x0002,
2763 NETIF_MSG_LINK
= 0x0004,
2764 NETIF_MSG_TIMER
= 0x0008,
2765 NETIF_MSG_IFDOWN
= 0x0010,
2766 NETIF_MSG_IFUP
= 0x0020,
2767 NETIF_MSG_RX_ERR
= 0x0040,
2768 NETIF_MSG_TX_ERR
= 0x0080,
2769 NETIF_MSG_TX_QUEUED
= 0x0100,
2770 NETIF_MSG_INTR
= 0x0200,
2771 NETIF_MSG_TX_DONE
= 0x0400,
2772 NETIF_MSG_RX_STATUS
= 0x0800,
2773 NETIF_MSG_PKTDATA
= 0x1000,
2774 NETIF_MSG_HW
= 0x2000,
2775 NETIF_MSG_WOL
= 0x4000,
2778 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2779 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2780 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2781 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2782 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2783 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2784 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2785 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2786 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2787 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2788 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2789 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2790 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2791 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2792 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2794 static inline u32
netif_msg_init(int debug_value
, int default_msg_enable_bits
)
2797 if (debug_value
< 0 || debug_value
>= (sizeof(u32
) * 8))
2798 return default_msg_enable_bits
;
2799 if (debug_value
== 0) /* no output */
2801 /* set low N bits */
2802 return (1 << debug_value
) - 1;
2805 static inline void __netif_tx_lock(struct netdev_queue
*txq
, int cpu
)
2807 spin_lock(&txq
->_xmit_lock
);
2808 txq
->xmit_lock_owner
= cpu
;
2811 static inline void __netif_tx_lock_bh(struct netdev_queue
*txq
)
2813 spin_lock_bh(&txq
->_xmit_lock
);
2814 txq
->xmit_lock_owner
= smp_processor_id();
2817 static inline bool __netif_tx_trylock(struct netdev_queue
*txq
)
2819 bool ok
= spin_trylock(&txq
->_xmit_lock
);
2821 txq
->xmit_lock_owner
= smp_processor_id();
2825 static inline void __netif_tx_unlock(struct netdev_queue
*txq
)
2827 txq
->xmit_lock_owner
= -1;
2828 spin_unlock(&txq
->_xmit_lock
);
2831 static inline void __netif_tx_unlock_bh(struct netdev_queue
*txq
)
2833 txq
->xmit_lock_owner
= -1;
2834 spin_unlock_bh(&txq
->_xmit_lock
);
2837 static inline void txq_trans_update(struct netdev_queue
*txq
)
2839 if (txq
->xmit_lock_owner
!= -1)
2840 txq
->trans_start
= jiffies
;
2844 * netif_tx_lock - grab network device transmit lock
2845 * @dev: network device
2847 * Get network device transmit lock
2849 static inline void netif_tx_lock(struct net_device
*dev
)
2854 spin_lock(&dev
->tx_global_lock
);
2855 cpu
= smp_processor_id();
2856 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2857 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2859 /* We are the only thread of execution doing a
2860 * freeze, but we have to grab the _xmit_lock in
2861 * order to synchronize with threads which are in
2862 * the ->hard_start_xmit() handler and already
2863 * checked the frozen bit.
2865 __netif_tx_lock(txq
, cpu
);
2866 set_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2867 __netif_tx_unlock(txq
);
2871 static inline void netif_tx_lock_bh(struct net_device
*dev
)
2877 static inline void netif_tx_unlock(struct net_device
*dev
)
2881 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2882 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2884 /* No need to grab the _xmit_lock here. If the
2885 * queue is not stopped for another reason, we
2888 clear_bit(__QUEUE_STATE_FROZEN
, &txq
->state
);
2889 netif_schedule_queue(txq
);
2891 spin_unlock(&dev
->tx_global_lock
);
2894 static inline void netif_tx_unlock_bh(struct net_device
*dev
)
2896 netif_tx_unlock(dev
);
2900 #define HARD_TX_LOCK(dev, txq, cpu) { \
2901 if ((dev->features & NETIF_F_LLTX) == 0) { \
2902 __netif_tx_lock(txq, cpu); \
2906 #define HARD_TX_TRYLOCK(dev, txq) \
2907 (((dev->features & NETIF_F_LLTX) == 0) ? \
2908 __netif_tx_trylock(txq) : \
2911 #define HARD_TX_UNLOCK(dev, txq) { \
2912 if ((dev->features & NETIF_F_LLTX) == 0) { \
2913 __netif_tx_unlock(txq); \
2917 static inline void netif_tx_disable(struct net_device
*dev
)
2923 cpu
= smp_processor_id();
2924 for (i
= 0; i
< dev
->num_tx_queues
; i
++) {
2925 struct netdev_queue
*txq
= netdev_get_tx_queue(dev
, i
);
2927 __netif_tx_lock(txq
, cpu
);
2928 netif_tx_stop_queue(txq
);
2929 __netif_tx_unlock(txq
);
2934 static inline void netif_addr_lock(struct net_device
*dev
)
2936 spin_lock(&dev
->addr_list_lock
);
2939 static inline void netif_addr_lock_nested(struct net_device
*dev
)
2941 spin_lock_nested(&dev
->addr_list_lock
, SINGLE_DEPTH_NESTING
);
2944 static inline void netif_addr_lock_bh(struct net_device
*dev
)
2946 spin_lock_bh(&dev
->addr_list_lock
);
2949 static inline void netif_addr_unlock(struct net_device
*dev
)
2951 spin_unlock(&dev
->addr_list_lock
);
2954 static inline void netif_addr_unlock_bh(struct net_device
*dev
)
2956 spin_unlock_bh(&dev
->addr_list_lock
);
2960 * dev_addrs walker. Should be used only for read access. Call with
2961 * rcu_read_lock held.
2963 #define for_each_dev_addr(dev, ha) \
2964 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2966 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2968 void ether_setup(struct net_device
*dev
);
2970 /* Support for loadable net-drivers */
2971 struct net_device
*alloc_netdev_mqs(int sizeof_priv
, const char *name
,
2972 void (*setup
)(struct net_device
*),
2973 unsigned int txqs
, unsigned int rxqs
);
2974 #define alloc_netdev(sizeof_priv, name, setup) \
2975 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2977 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2978 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2980 int register_netdev(struct net_device
*dev
);
2981 void unregister_netdev(struct net_device
*dev
);
2983 /* General hardware address lists handling functions */
2984 int __hw_addr_sync(struct netdev_hw_addr_list
*to_list
,
2985 struct netdev_hw_addr_list
*from_list
, int addr_len
);
2986 void __hw_addr_unsync(struct netdev_hw_addr_list
*to_list
,
2987 struct netdev_hw_addr_list
*from_list
, int addr_len
);
2988 void __hw_addr_init(struct netdev_hw_addr_list
*list
);
2990 /* Functions used for device addresses handling */
2991 int dev_addr_add(struct net_device
*dev
, const unsigned char *addr
,
2992 unsigned char addr_type
);
2993 int dev_addr_del(struct net_device
*dev
, const unsigned char *addr
,
2994 unsigned char addr_type
);
2995 void dev_addr_flush(struct net_device
*dev
);
2996 int dev_addr_init(struct net_device
*dev
);
2998 /* Functions used for unicast addresses handling */
2999 int dev_uc_add(struct net_device
*dev
, const unsigned char *addr
);
3000 int dev_uc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3001 int dev_uc_del(struct net_device
*dev
, const unsigned char *addr
);
3002 int dev_uc_sync(struct net_device
*to
, struct net_device
*from
);
3003 int dev_uc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3004 void dev_uc_unsync(struct net_device
*to
, struct net_device
*from
);
3005 void dev_uc_flush(struct net_device
*dev
);
3006 void dev_uc_init(struct net_device
*dev
);
3008 /* Functions used for multicast addresses handling */
3009 int dev_mc_add(struct net_device
*dev
, const unsigned char *addr
);
3010 int dev_mc_add_global(struct net_device
*dev
, const unsigned char *addr
);
3011 int dev_mc_add_excl(struct net_device
*dev
, const unsigned char *addr
);
3012 int dev_mc_del(struct net_device
*dev
, const unsigned char *addr
);
3013 int dev_mc_del_global(struct net_device
*dev
, const unsigned char *addr
);
3014 int dev_mc_sync(struct net_device
*to
, struct net_device
*from
);
3015 int dev_mc_sync_multiple(struct net_device
*to
, struct net_device
*from
);
3016 void dev_mc_unsync(struct net_device
*to
, struct net_device
*from
);
3017 void dev_mc_flush(struct net_device
*dev
);
3018 void dev_mc_init(struct net_device
*dev
);
3020 /* Functions used for secondary unicast and multicast support */
3021 void dev_set_rx_mode(struct net_device
*dev
);
3022 void __dev_set_rx_mode(struct net_device
*dev
);
3023 int dev_set_promiscuity(struct net_device
*dev
, int inc
);
3024 int dev_set_allmulti(struct net_device
*dev
, int inc
);
3025 void netdev_state_change(struct net_device
*dev
);
3026 void netdev_notify_peers(struct net_device
*dev
);
3027 void netdev_features_change(struct net_device
*dev
);
3028 /* Load a device via the kmod */
3029 void dev_load(struct net
*net
, const char *name
);
3030 struct rtnl_link_stats64
*dev_get_stats(struct net_device
*dev
,
3031 struct rtnl_link_stats64
*storage
);
3032 void netdev_stats_to_stats64(struct rtnl_link_stats64
*stats64
,
3033 const struct net_device_stats
*netdev_stats
);
3035 extern int netdev_max_backlog
;
3036 extern int netdev_tstamp_prequeue
;
3037 extern int weight_p
;
3038 extern int bpf_jit_enable
;
3040 bool netdev_has_upper_dev(struct net_device
*dev
, struct net_device
*upper_dev
);
3041 struct net_device
*netdev_all_upper_get_next_dev_rcu(struct net_device
*dev
,
3042 struct list_head
**iter
);
3044 /* iterate through upper list, must be called under RCU read lock */
3045 #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
3046 for (iter = &(dev)->all_adj_list.upper, \
3047 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
3049 updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3051 void *netdev_lower_get_next_private(struct net_device
*dev
,
3052 struct list_head
**iter
);
3053 void *netdev_lower_get_next_private_rcu(struct net_device
*dev
,
3054 struct list_head
**iter
);
3056 #define netdev_for_each_lower_private(dev, priv, iter) \
3057 for (iter = (dev)->adj_list.lower.next, \
3058 priv = netdev_lower_get_next_private(dev, &(iter)); \
3060 priv = netdev_lower_get_next_private(dev, &(iter)))
3062 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
3063 for (iter = &(dev)->adj_list.lower, \
3064 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
3066 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
3068 void *netdev_adjacent_get_private(struct list_head
*adj_list
);
3069 void *netdev_lower_get_first_private_rcu(struct net_device
*dev
);
3070 struct net_device
*netdev_master_upper_dev_get(struct net_device
*dev
);
3071 struct net_device
*netdev_master_upper_dev_get_rcu(struct net_device
*dev
);
3072 int netdev_upper_dev_link(struct net_device
*dev
, struct net_device
*upper_dev
);
3073 int netdev_master_upper_dev_link(struct net_device
*dev
,
3074 struct net_device
*upper_dev
);
3075 int netdev_master_upper_dev_link_private(struct net_device
*dev
,
3076 struct net_device
*upper_dev
,
3078 void netdev_upper_dev_unlink(struct net_device
*dev
,
3079 struct net_device
*upper_dev
);
3080 void netdev_adjacent_rename_links(struct net_device
*dev
, char *oldname
);
3081 void *netdev_lower_dev_get_private(struct net_device
*dev
,
3082 struct net_device
*lower_dev
);
3083 int skb_checksum_help(struct sk_buff
*skb
);
3084 struct sk_buff
*__skb_gso_segment(struct sk_buff
*skb
,
3085 netdev_features_t features
, bool tx_path
);
3086 struct sk_buff
*skb_mac_gso_segment(struct sk_buff
*skb
,
3087 netdev_features_t features
);
3090 struct sk_buff
*skb_gso_segment(struct sk_buff
*skb
, netdev_features_t features
)
3092 return __skb_gso_segment(skb
, features
, true);
3094 __be16
skb_network_protocol(struct sk_buff
*skb
, int *depth
);
3096 static inline bool can_checksum_protocol(netdev_features_t features
,
3099 return ((features
& NETIF_F_GEN_CSUM
) ||
3100 ((features
& NETIF_F_V4_CSUM
) &&
3101 protocol
== htons(ETH_P_IP
)) ||
3102 ((features
& NETIF_F_V6_CSUM
) &&
3103 protocol
== htons(ETH_P_IPV6
)) ||
3104 ((features
& NETIF_F_FCOE_CRC
) &&
3105 protocol
== htons(ETH_P_FCOE
)));
3109 void netdev_rx_csum_fault(struct net_device
*dev
);
3111 static inline void netdev_rx_csum_fault(struct net_device
*dev
)
3115 /* rx skb timestamps */
3116 void net_enable_timestamp(void);
3117 void net_disable_timestamp(void);
3119 #ifdef CONFIG_PROC_FS
3120 int __init
dev_proc_init(void);
3122 #define dev_proc_init() 0
3125 int netdev_class_create_file_ns(struct class_attribute
*class_attr
,
3127 void netdev_class_remove_file_ns(struct class_attribute
*class_attr
,
3130 static inline int netdev_class_create_file(struct class_attribute
*class_attr
)
3132 return netdev_class_create_file_ns(class_attr
, NULL
);
3135 static inline void netdev_class_remove_file(struct class_attribute
*class_attr
)
3137 netdev_class_remove_file_ns(class_attr
, NULL
);
3140 extern struct kobj_ns_type_operations net_ns_type_operations
;
3142 const char *netdev_drivername(const struct net_device
*dev
);
3144 void linkwatch_run_queue(void);
3146 static inline netdev_features_t
netdev_get_wanted_features(
3147 struct net_device
*dev
)
3149 return (dev
->features
& ~dev
->hw_features
) | dev
->wanted_features
;
3151 netdev_features_t
netdev_increment_features(netdev_features_t all
,
3152 netdev_features_t one
, netdev_features_t mask
);
3154 /* Allow TSO being used on stacked device :
3155 * Performing the GSO segmentation before last device
3156 * is a performance improvement.
3158 static inline netdev_features_t
netdev_add_tso_features(netdev_features_t features
,
3159 netdev_features_t mask
)
3161 return netdev_increment_features(features
, NETIF_F_ALL_TSO
, mask
);
3164 int __netdev_update_features(struct net_device
*dev
);
3165 void netdev_update_features(struct net_device
*dev
);
3166 void netdev_change_features(struct net_device
*dev
);
3168 void netif_stacked_transfer_operstate(const struct net_device
*rootdev
,
3169 struct net_device
*dev
);
3171 netdev_features_t
netif_skb_dev_features(struct sk_buff
*skb
,
3172 const struct net_device
*dev
);
3173 static inline netdev_features_t
netif_skb_features(struct sk_buff
*skb
)
3175 return netif_skb_dev_features(skb
, skb
->dev
);
3178 static inline bool net_gso_ok(netdev_features_t features
, int gso_type
)
3180 netdev_features_t feature
= gso_type
<< NETIF_F_GSO_SHIFT
;
3182 /* check flags correspondence */
3183 BUILD_BUG_ON(SKB_GSO_TCPV4
!= (NETIF_F_TSO
>> NETIF_F_GSO_SHIFT
));
3184 BUILD_BUG_ON(SKB_GSO_UDP
!= (NETIF_F_UFO
>> NETIF_F_GSO_SHIFT
));
3185 BUILD_BUG_ON(SKB_GSO_DODGY
!= (NETIF_F_GSO_ROBUST
>> NETIF_F_GSO_SHIFT
));
3186 BUILD_BUG_ON(SKB_GSO_TCP_ECN
!= (NETIF_F_TSO_ECN
>> NETIF_F_GSO_SHIFT
));
3187 BUILD_BUG_ON(SKB_GSO_TCPV6
!= (NETIF_F_TSO6
>> NETIF_F_GSO_SHIFT
));
3188 BUILD_BUG_ON(SKB_GSO_FCOE
!= (NETIF_F_FSO
>> NETIF_F_GSO_SHIFT
));
3190 return (features
& feature
) == feature
;
3193 static inline bool skb_gso_ok(struct sk_buff
*skb
, netdev_features_t features
)
3195 return net_gso_ok(features
, skb_shinfo(skb
)->gso_type
) &&
3196 (!skb_has_frag_list(skb
) || (features
& NETIF_F_FRAGLIST
));
3199 static inline bool netif_needs_gso(struct sk_buff
*skb
,
3200 netdev_features_t features
)
3202 return skb_is_gso(skb
) && (!skb_gso_ok(skb
, features
) ||
3203 unlikely((skb
->ip_summed
!= CHECKSUM_PARTIAL
) &&
3204 (skb
->ip_summed
!= CHECKSUM_UNNECESSARY
)));
3207 static inline void netif_set_gso_max_size(struct net_device
*dev
,
3210 dev
->gso_max_size
= size
;
3213 static inline void skb_gso_error_unwind(struct sk_buff
*skb
, __be16 protocol
,
3214 int pulled_hlen
, u16 mac_offset
,
3217 skb
->protocol
= protocol
;
3218 skb
->encapsulation
= 1;
3219 skb_push(skb
, pulled_hlen
);
3220 skb_reset_transport_header(skb
);
3221 skb
->mac_header
= mac_offset
;
3222 skb
->network_header
= skb
->mac_header
+ mac_len
;
3223 skb
->mac_len
= mac_len
;
3226 static inline bool netif_is_macvlan(struct net_device
*dev
)
3228 return dev
->priv_flags
& IFF_MACVLAN
;
3231 static inline bool netif_is_bond_master(struct net_device
*dev
)
3233 return dev
->flags
& IFF_MASTER
&& dev
->priv_flags
& IFF_BONDING
;
3236 static inline bool netif_is_bond_slave(struct net_device
*dev
)
3238 return dev
->flags
& IFF_SLAVE
&& dev
->priv_flags
& IFF_BONDING
;
3241 static inline bool netif_supports_nofcs(struct net_device
*dev
)
3243 return dev
->priv_flags
& IFF_SUPP_NOFCS
;
3246 extern struct pernet_operations __net_initdata loopback_net_ops
;
3248 /* Logging, debugging and troubleshooting/diagnostic helpers. */
3250 /* netdev_printk helpers, similar to dev_printk */
3252 static inline const char *netdev_name(const struct net_device
*dev
)
3254 if (dev
->reg_state
!= NETREG_REGISTERED
)
3255 return "(unregistered net_device)";
3260 int netdev_printk(const char *level
, const struct net_device
*dev
,
3261 const char *format
, ...);
3263 int netdev_emerg(const struct net_device
*dev
, const char *format
, ...);
3265 int netdev_alert(const struct net_device
*dev
, const char *format
, ...);
3267 int netdev_crit(const struct net_device
*dev
, const char *format
, ...);
3269 int netdev_err(const struct net_device
*dev
, const char *format
, ...);
3271 int netdev_warn(const struct net_device
*dev
, const char *format
, ...);
3273 int netdev_notice(const struct net_device
*dev
, const char *format
, ...);
3275 int netdev_info(const struct net_device
*dev
, const char *format
, ...);
3277 #define MODULE_ALIAS_NETDEV(device) \
3278 MODULE_ALIAS("netdev-" device)
3280 #if defined(CONFIG_DYNAMIC_DEBUG)
3281 #define netdev_dbg(__dev, format, args...) \
3283 dynamic_netdev_dbg(__dev, format, ##args); \
3285 #elif defined(DEBUG)
3286 #define netdev_dbg(__dev, format, args...) \
3287 netdev_printk(KERN_DEBUG, __dev, format, ##args)
3289 #define netdev_dbg(__dev, format, args...) \
3292 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
3297 #if defined(VERBOSE_DEBUG)
3298 #define netdev_vdbg netdev_dbg
3301 #define netdev_vdbg(dev, format, args...) \
3304 netdev_printk(KERN_DEBUG, dev, format, ##args); \
3310 * netdev_WARN() acts like dev_printk(), but with the key difference
3311 * of using a WARN/WARN_ON to get the message out, including the
3312 * file/line information and a backtrace.
3314 #define netdev_WARN(dev, format, args...) \
3315 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args)
3317 /* netif printk helpers, similar to netdev_printk */
3319 #define netif_printk(priv, type, level, dev, fmt, args...) \
3321 if (netif_msg_##type(priv)) \
3322 netdev_printk(level, (dev), fmt, ##args); \
3325 #define netif_level(level, priv, type, dev, fmt, args...) \
3327 if (netif_msg_##type(priv)) \
3328 netdev_##level(dev, fmt, ##args); \
3331 #define netif_emerg(priv, type, dev, fmt, args...) \
3332 netif_level(emerg, priv, type, dev, fmt, ##args)
3333 #define netif_alert(priv, type, dev, fmt, args...) \
3334 netif_level(alert, priv, type, dev, fmt, ##args)
3335 #define netif_crit(priv, type, dev, fmt, args...) \
3336 netif_level(crit, priv, type, dev, fmt, ##args)
3337 #define netif_err(priv, type, dev, fmt, args...) \
3338 netif_level(err, priv, type, dev, fmt, ##args)
3339 #define netif_warn(priv, type, dev, fmt, args...) \
3340 netif_level(warn, priv, type, dev, fmt, ##args)
3341 #define netif_notice(priv, type, dev, fmt, args...) \
3342 netif_level(notice, priv, type, dev, fmt, ##args)
3343 #define netif_info(priv, type, dev, fmt, args...) \
3344 netif_level(info, priv, type, dev, fmt, ##args)
3346 #if defined(CONFIG_DYNAMIC_DEBUG)
3347 #define netif_dbg(priv, type, netdev, format, args...) \
3349 if (netif_msg_##type(priv)) \
3350 dynamic_netdev_dbg(netdev, format, ##args); \
3352 #elif defined(DEBUG)
3353 #define netif_dbg(priv, type, dev, format, args...) \
3354 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3356 #define netif_dbg(priv, type, dev, format, args...) \
3359 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3364 #if defined(VERBOSE_DEBUG)
3365 #define netif_vdbg netif_dbg
3367 #define netif_vdbg(priv, type, dev, format, args...) \
3370 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3376 * The list of packet types we will receive (as opposed to discard)
3377 * and the routines to invoke.
3379 * Why 16. Because with 16 the only overlap we get on a hash of the
3380 * low nibble of the protocol value is RARP/SNAP/X.25.
3382 * NOTE: That is no longer true with the addition of VLAN tags. Not
3383 * sure which should go first, but I bet it won't make much
3384 * difference if we are running VLANs. The good news is that
3385 * this protocol won't be in the list unless compiled in, so
3386 * the average user (w/out VLANs) will not be adversely affected.
3402 #define PTYPE_HASH_SIZE (16)
3403 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
3405 #endif /* _LINUX_NETDEVICE_H */