net: don't allow CAP_NET_ADMIN to load non-netdev kernel modules
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / netdevice.h
blob71caf7a5e6c6cc59fd975f06a0ce6bb304288d52
1 /*
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
10 * Authors: Ross Biro
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/if.h>
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
31 #include <linux/if_link.h>
33 #ifdef __KERNEL__
34 #include <linux/pm_qos_params.h>
35 #include <linux/timer.h>
36 #include <linux/delay.h>
37 #include <linux/mm.h>
38 #include <asm/atomic.h>
39 #include <asm/cache.h>
40 #include <asm/byteorder.h>
42 #include <linux/device.h>
43 #include <linux/percpu.h>
44 #include <linux/rculist.h>
45 #include <linux/dmaengine.h>
46 #include <linux/workqueue.h>
48 #include <linux/ethtool.h>
49 #include <net/net_namespace.h>
50 #include <net/dsa.h>
51 #ifdef CONFIG_DCB
52 #include <net/dcbnl.h>
53 #endif
55 struct vlan_group;
56 struct netpoll_info;
57 struct phy_device;
58 /* 802.11 specific */
59 struct wireless_dev;
60 /* source back-compat hooks */
61 #define SET_ETHTOOL_OPS(netdev,ops) \
62 ( (netdev)->ethtool_ops = (ops) )
64 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
65 functions are available. */
66 #define HAVE_FREE_NETDEV /* free_netdev() */
67 #define HAVE_NETDEV_PRIV /* netdev_priv() */
69 /* hardware address assignment types */
70 #define NET_ADDR_PERM 0 /* address is permanent (default) */
71 #define NET_ADDR_RANDOM 1 /* address is generated randomly */
72 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */
74 /* Backlog congestion levels */
75 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
76 #define NET_RX_DROP 1 /* packet dropped */
79 * Transmit return codes: transmit return codes originate from three different
80 * namespaces:
82 * - qdisc return codes
83 * - driver transmit return codes
84 * - errno values
86 * Drivers are allowed to return any one of those in their hard_start_xmit()
87 * function. Real network devices commonly used with qdiscs should only return
88 * the driver transmit return codes though - when qdiscs are used, the actual
89 * transmission happens asynchronously, so the value is not propagated to
90 * higher layers. Virtual network devices transmit synchronously, in this case
91 * the driver transmit return codes are consumed by dev_queue_xmit(), all
92 * others are propagated to higher layers.
95 /* qdisc ->enqueue() return codes. */
96 #define NET_XMIT_SUCCESS 0x00
97 #define NET_XMIT_DROP 0x01 /* skb dropped */
98 #define NET_XMIT_CN 0x02 /* congestion notification */
99 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */
100 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
102 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
103 * indicates that the device will soon be dropping packets, or already drops
104 * some packets of the same priority; prompting us to send less aggressively. */
105 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
106 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
108 /* Driver transmit return codes */
109 #define NETDEV_TX_MASK 0xf0
111 enum netdev_tx {
112 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
113 NETDEV_TX_OK = 0x00, /* driver took care of packet */
114 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
115 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
117 typedef enum netdev_tx netdev_tx_t;
120 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
121 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
123 static inline bool dev_xmit_complete(int rc)
126 * Positive cases with an skb consumed by a driver:
127 * - successful transmission (rc == NETDEV_TX_OK)
128 * - error while transmitting (rc < 0)
129 * - error while queueing to a different device (rc & NET_XMIT_MASK)
131 if (likely(rc < NET_XMIT_MASK))
132 return true;
134 return false;
137 #endif
139 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
141 #ifdef __KERNEL__
143 * Compute the worst case header length according to the protocols
144 * used.
147 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
148 # if defined(CONFIG_MAC80211_MESH)
149 # define LL_MAX_HEADER 128
150 # else
151 # define LL_MAX_HEADER 96
152 # endif
153 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
154 # define LL_MAX_HEADER 48
155 #else
156 # define LL_MAX_HEADER 32
157 #endif
159 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
160 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
161 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
162 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
163 #define MAX_HEADER LL_MAX_HEADER
164 #else
165 #define MAX_HEADER (LL_MAX_HEADER + 48)
166 #endif
169 * Old network device statistics. Fields are native words
170 * (unsigned long) so they can be read and written atomically.
173 struct net_device_stats {
174 unsigned long rx_packets;
175 unsigned long tx_packets;
176 unsigned long rx_bytes;
177 unsigned long tx_bytes;
178 unsigned long rx_errors;
179 unsigned long tx_errors;
180 unsigned long rx_dropped;
181 unsigned long tx_dropped;
182 unsigned long multicast;
183 unsigned long collisions;
184 unsigned long rx_length_errors;
185 unsigned long rx_over_errors;
186 unsigned long rx_crc_errors;
187 unsigned long rx_frame_errors;
188 unsigned long rx_fifo_errors;
189 unsigned long rx_missed_errors;
190 unsigned long tx_aborted_errors;
191 unsigned long tx_carrier_errors;
192 unsigned long tx_fifo_errors;
193 unsigned long tx_heartbeat_errors;
194 unsigned long tx_window_errors;
195 unsigned long rx_compressed;
196 unsigned long tx_compressed;
199 #endif /* __KERNEL__ */
202 /* Media selection options. */
203 enum {
204 IF_PORT_UNKNOWN = 0,
205 IF_PORT_10BASE2,
206 IF_PORT_10BASET,
207 IF_PORT_AUI,
208 IF_PORT_100BASET,
209 IF_PORT_100BASETX,
210 IF_PORT_100BASEFX
213 #ifdef __KERNEL__
215 #include <linux/cache.h>
216 #include <linux/skbuff.h>
218 struct neighbour;
219 struct neigh_parms;
220 struct sk_buff;
222 struct netdev_hw_addr {
223 struct list_head list;
224 unsigned char addr[MAX_ADDR_LEN];
225 unsigned char type;
226 #define NETDEV_HW_ADDR_T_LAN 1
227 #define NETDEV_HW_ADDR_T_SAN 2
228 #define NETDEV_HW_ADDR_T_SLAVE 3
229 #define NETDEV_HW_ADDR_T_UNICAST 4
230 #define NETDEV_HW_ADDR_T_MULTICAST 5
231 bool synced;
232 bool global_use;
233 int refcount;
234 struct rcu_head rcu_head;
237 struct netdev_hw_addr_list {
238 struct list_head list;
239 int count;
242 #define netdev_hw_addr_list_count(l) ((l)->count)
243 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
244 #define netdev_hw_addr_list_for_each(ha, l) \
245 list_for_each_entry(ha, &(l)->list, list)
247 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
248 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
249 #define netdev_for_each_uc_addr(ha, dev) \
250 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
252 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
253 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
254 #define netdev_for_each_mc_addr(ha, dev) \
255 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
257 struct hh_cache {
258 struct hh_cache *hh_next; /* Next entry */
259 atomic_t hh_refcnt; /* number of users */
261 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
262 * cache line on SMP.
263 * They are mostly read, but hh_refcnt may be changed quite frequently,
264 * incurring cache line ping pongs.
266 __be16 hh_type ____cacheline_aligned_in_smp;
267 /* protocol identifier, f.e ETH_P_IP
268 * NOTE: For VLANs, this will be the
269 * encapuslated type. --BLG
271 u16 hh_len; /* length of header */
272 int (*hh_output)(struct sk_buff *skb);
273 seqlock_t hh_lock;
275 /* cached hardware header; allow for machine alignment needs. */
276 #define HH_DATA_MOD 16
277 #define HH_DATA_OFF(__len) \
278 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
279 #define HH_DATA_ALIGN(__len) \
280 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
281 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
284 static inline void hh_cache_put(struct hh_cache *hh)
286 if (atomic_dec_and_test(&hh->hh_refcnt))
287 kfree(hh);
290 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
291 * Alternative is:
292 * dev->hard_header_len ? (dev->hard_header_len +
293 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
295 * We could use other alignment values, but we must maintain the
296 * relationship HH alignment <= LL alignment.
298 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
299 * may need.
301 #define LL_RESERVED_SPACE(dev) \
302 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
303 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
304 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
305 #define LL_ALLOCATED_SPACE(dev) \
306 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308 struct header_ops {
309 int (*create) (struct sk_buff *skb, struct net_device *dev,
310 unsigned short type, const void *daddr,
311 const void *saddr, unsigned len);
312 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
313 int (*rebuild)(struct sk_buff *skb);
314 #define HAVE_HEADER_CACHE
315 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
316 void (*cache_update)(struct hh_cache *hh,
317 const struct net_device *dev,
318 const unsigned char *haddr);
321 /* These flag bits are private to the generic network queueing
322 * layer, they may not be explicitly referenced by any other
323 * code.
326 enum netdev_state_t {
327 __LINK_STATE_START,
328 __LINK_STATE_PRESENT,
329 __LINK_STATE_NOCARRIER,
330 __LINK_STATE_LINKWATCH_PENDING,
331 __LINK_STATE_DORMANT,
336 * This structure holds at boot time configured netdevice settings. They
337 * are then used in the device probing.
339 struct netdev_boot_setup {
340 char name[IFNAMSIZ];
341 struct ifmap map;
343 #define NETDEV_BOOT_SETUP_MAX 8
345 extern int __init netdev_boot_setup(char *str);
348 * Structure for NAPI scheduling similar to tasklet but with weighting
350 struct napi_struct {
351 /* The poll_list must only be managed by the entity which
352 * changes the state of the NAPI_STATE_SCHED bit. This means
353 * whoever atomically sets that bit can add this napi_struct
354 * to the per-cpu poll_list, and whoever clears that bit
355 * can remove from the list right before clearing the bit.
357 struct list_head poll_list;
359 unsigned long state;
360 int weight;
361 int (*poll)(struct napi_struct *, int);
362 #ifdef CONFIG_NETPOLL
363 spinlock_t poll_lock;
364 int poll_owner;
365 #endif
367 unsigned int gro_count;
369 struct net_device *dev;
370 struct list_head dev_list;
371 struct sk_buff *gro_list;
372 struct sk_buff *skb;
375 enum {
376 NAPI_STATE_SCHED, /* Poll is scheduled */
377 NAPI_STATE_DISABLE, /* Disable pending */
378 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
381 enum gro_result {
382 GRO_MERGED,
383 GRO_MERGED_FREE,
384 GRO_HELD,
385 GRO_NORMAL,
386 GRO_DROP,
388 typedef enum gro_result gro_result_t;
390 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
392 extern void __napi_schedule(struct napi_struct *n);
394 static inline int napi_disable_pending(struct napi_struct *n)
396 return test_bit(NAPI_STATE_DISABLE, &n->state);
400 * napi_schedule_prep - check if napi can be scheduled
401 * @n: napi context
403 * Test if NAPI routine is already running, and if not mark
404 * it as running. This is used as a condition variable
405 * insure only one NAPI poll instance runs. We also make
406 * sure there is no pending NAPI disable.
408 static inline int napi_schedule_prep(struct napi_struct *n)
410 return !napi_disable_pending(n) &&
411 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
415 * napi_schedule - schedule NAPI poll
416 * @n: napi context
418 * Schedule NAPI poll routine to be called if it is not already
419 * running.
421 static inline void napi_schedule(struct napi_struct *n)
423 if (napi_schedule_prep(n))
424 __napi_schedule(n);
427 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
428 static inline int napi_reschedule(struct napi_struct *napi)
430 if (napi_schedule_prep(napi)) {
431 __napi_schedule(napi);
432 return 1;
434 return 0;
438 * napi_complete - NAPI processing complete
439 * @n: napi context
441 * Mark NAPI processing as complete.
443 extern void __napi_complete(struct napi_struct *n);
444 extern void napi_complete(struct napi_struct *n);
447 * napi_disable - prevent NAPI from scheduling
448 * @n: napi context
450 * Stop NAPI from being scheduled on this context.
451 * Waits till any outstanding processing completes.
453 static inline void napi_disable(struct napi_struct *n)
455 set_bit(NAPI_STATE_DISABLE, &n->state);
456 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
457 msleep(1);
458 clear_bit(NAPI_STATE_DISABLE, &n->state);
462 * napi_enable - enable NAPI scheduling
463 * @n: napi context
465 * Resume NAPI from being scheduled on this context.
466 * Must be paired with napi_disable.
468 static inline void napi_enable(struct napi_struct *n)
470 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
471 smp_mb__before_clear_bit();
472 clear_bit(NAPI_STATE_SCHED, &n->state);
475 #ifdef CONFIG_SMP
477 * napi_synchronize - wait until NAPI is not running
478 * @n: napi context
480 * Wait until NAPI is done being scheduled on this context.
481 * Waits till any outstanding processing completes but
482 * does not disable future activations.
484 static inline void napi_synchronize(const struct napi_struct *n)
486 while (test_bit(NAPI_STATE_SCHED, &n->state))
487 msleep(1);
489 #else
490 # define napi_synchronize(n) barrier()
491 #endif
493 enum netdev_queue_state_t {
494 __QUEUE_STATE_XOFF,
495 __QUEUE_STATE_FROZEN,
496 #define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \
497 (1 << __QUEUE_STATE_FROZEN))
500 struct netdev_queue {
502 * read mostly part
504 struct net_device *dev;
505 struct Qdisc *qdisc;
506 unsigned long state;
507 struct Qdisc *qdisc_sleeping;
508 #ifdef CONFIG_RPS
509 struct kobject kobj;
510 #endif
511 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
512 int numa_node;
513 #endif
515 * write mostly part
517 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
518 int xmit_lock_owner;
520 * please use this field instead of dev->trans_start
522 unsigned long trans_start;
523 } ____cacheline_aligned_in_smp;
525 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
527 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
528 return q->numa_node;
529 #else
530 return NUMA_NO_NODE;
531 #endif
534 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
536 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
537 q->numa_node = node;
538 #endif
541 #ifdef CONFIG_RPS
543 * This structure holds an RPS map which can be of variable length. The
544 * map is an array of CPUs.
546 struct rps_map {
547 unsigned int len;
548 struct rcu_head rcu;
549 u16 cpus[0];
551 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
554 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
555 * tail pointer for that CPU's input queue at the time of last enqueue.
557 struct rps_dev_flow {
558 u16 cpu;
559 u16 fill;
560 unsigned int last_qtail;
564 * The rps_dev_flow_table structure contains a table of flow mappings.
566 struct rps_dev_flow_table {
567 unsigned int mask;
568 struct rcu_head rcu;
569 struct work_struct free_work;
570 struct rps_dev_flow flows[0];
572 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
573 (_num * sizeof(struct rps_dev_flow)))
576 * The rps_sock_flow_table contains mappings of flows to the last CPU
577 * on which they were processed by the application (set in recvmsg).
579 struct rps_sock_flow_table {
580 unsigned int mask;
581 u16 ents[0];
583 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
584 (_num * sizeof(u16)))
586 #define RPS_NO_CPU 0xffff
588 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
589 u32 hash)
591 if (table && hash) {
592 unsigned int cpu, index = hash & table->mask;
594 /* We only give a hint, preemption can change cpu under us */
595 cpu = raw_smp_processor_id();
597 if (table->ents[index] != cpu)
598 table->ents[index] = cpu;
602 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
603 u32 hash)
605 if (table && hash)
606 table->ents[hash & table->mask] = RPS_NO_CPU;
609 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
611 /* This structure contains an instance of an RX queue. */
612 struct netdev_rx_queue {
613 struct rps_map __rcu *rps_map;
614 struct rps_dev_flow_table __rcu *rps_flow_table;
615 struct kobject kobj;
616 struct net_device *dev;
617 } ____cacheline_aligned_in_smp;
618 #endif /* CONFIG_RPS */
620 #ifdef CONFIG_XPS
622 * This structure holds an XPS map which can be of variable length. The
623 * map is an array of queues.
625 struct xps_map {
626 unsigned int len;
627 unsigned int alloc_len;
628 struct rcu_head rcu;
629 u16 queues[0];
631 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
632 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
633 / sizeof(u16))
636 * This structure holds all XPS maps for device. Maps are indexed by CPU.
638 struct xps_dev_maps {
639 struct rcu_head rcu;
640 struct xps_map __rcu *cpu_map[0];
642 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
643 (nr_cpu_ids * sizeof(struct xps_map *)))
644 #endif /* CONFIG_XPS */
647 * This structure defines the management hooks for network devices.
648 * The following hooks can be defined; unless noted otherwise, they are
649 * optional and can be filled with a null pointer.
651 * int (*ndo_init)(struct net_device *dev);
652 * This function is called once when network device is registered.
653 * The network device can use this to any late stage initializaton
654 * or semantic validattion. It can fail with an error code which will
655 * be propogated back to register_netdev
657 * void (*ndo_uninit)(struct net_device *dev);
658 * This function is called when device is unregistered or when registration
659 * fails. It is not called if init fails.
661 * int (*ndo_open)(struct net_device *dev);
662 * This function is called when network device transistions to the up
663 * state.
665 * int (*ndo_stop)(struct net_device *dev);
666 * This function is called when network device transistions to the down
667 * state.
669 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
670 * struct net_device *dev);
671 * Called when a packet needs to be transmitted.
672 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
673 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
674 * Required can not be NULL.
676 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
677 * Called to decide which queue to when device supports multiple
678 * transmit queues.
680 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
681 * This function is called to allow device receiver to make
682 * changes to configuration when multicast or promiscious is enabled.
684 * void (*ndo_set_rx_mode)(struct net_device *dev);
685 * This function is called device changes address list filtering.
687 * void (*ndo_set_multicast_list)(struct net_device *dev);
688 * This function is called when the multicast address list changes.
690 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
691 * This function is called when the Media Access Control address
692 * needs to be changed. If this interface is not defined, the
693 * mac address can not be changed.
695 * int (*ndo_validate_addr)(struct net_device *dev);
696 * Test if Media Access Control address is valid for the device.
698 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
699 * Called when a user request an ioctl which can't be handled by
700 * the generic interface code. If not defined ioctl's return
701 * not supported error code.
703 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
704 * Used to set network devices bus interface parameters. This interface
705 * is retained for legacy reason, new devices should use the bus
706 * interface (PCI) for low level management.
708 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
709 * Called when a user wants to change the Maximum Transfer Unit
710 * of a device. If not defined, any request to change MTU will
711 * will return an error.
713 * void (*ndo_tx_timeout)(struct net_device *dev);
714 * Callback uses when the transmitter has not made any progress
715 * for dev->watchdog ticks.
717 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
718 * struct rtnl_link_stats64 *storage);
719 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
720 * Called when a user wants to get the network device usage
721 * statistics. Drivers must do one of the following:
722 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
723 * rtnl_link_stats64 structure passed by the caller.
724 * 2. Define @ndo_get_stats to update a net_device_stats structure
725 * (which should normally be dev->stats) and return a pointer to
726 * it. The structure may be changed asynchronously only if each
727 * field is written atomically.
728 * 3. Update dev->stats asynchronously and atomically, and define
729 * neither operation.
731 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
732 * If device support VLAN receive acceleration
733 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
734 * when vlan groups for the device changes. Note: grp is NULL
735 * if no vlan's groups are being used.
737 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
738 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
739 * this function is called when a VLAN id is registered.
741 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
742 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
743 * this function is called when a VLAN id is unregistered.
745 * void (*ndo_poll_controller)(struct net_device *dev);
747 * SR-IOV management functions.
748 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
749 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
750 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
751 * int (*ndo_get_vf_config)(struct net_device *dev,
752 * int vf, struct ifla_vf_info *ivf);
753 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
754 * struct nlattr *port[]);
755 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
757 #define HAVE_NET_DEVICE_OPS
758 struct net_device_ops {
759 int (*ndo_init)(struct net_device *dev);
760 void (*ndo_uninit)(struct net_device *dev);
761 int (*ndo_open)(struct net_device *dev);
762 int (*ndo_stop)(struct net_device *dev);
763 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
764 struct net_device *dev);
765 u16 (*ndo_select_queue)(struct net_device *dev,
766 struct sk_buff *skb);
767 void (*ndo_change_rx_flags)(struct net_device *dev,
768 int flags);
769 void (*ndo_set_rx_mode)(struct net_device *dev);
770 void (*ndo_set_multicast_list)(struct net_device *dev);
771 int (*ndo_set_mac_address)(struct net_device *dev,
772 void *addr);
773 int (*ndo_validate_addr)(struct net_device *dev);
774 int (*ndo_do_ioctl)(struct net_device *dev,
775 struct ifreq *ifr, int cmd);
776 int (*ndo_set_config)(struct net_device *dev,
777 struct ifmap *map);
778 int (*ndo_change_mtu)(struct net_device *dev,
779 int new_mtu);
780 int (*ndo_neigh_setup)(struct net_device *dev,
781 struct neigh_parms *);
782 void (*ndo_tx_timeout) (struct net_device *dev);
784 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
785 struct rtnl_link_stats64 *storage);
786 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
788 void (*ndo_vlan_rx_register)(struct net_device *dev,
789 struct vlan_group *grp);
790 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
791 unsigned short vid);
792 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
793 unsigned short vid);
794 #ifdef CONFIG_NET_POLL_CONTROLLER
795 void (*ndo_poll_controller)(struct net_device *dev);
796 int (*ndo_netpoll_setup)(struct net_device *dev,
797 struct netpoll_info *info);
798 void (*ndo_netpoll_cleanup)(struct net_device *dev);
799 #endif
800 int (*ndo_set_vf_mac)(struct net_device *dev,
801 int queue, u8 *mac);
802 int (*ndo_set_vf_vlan)(struct net_device *dev,
803 int queue, u16 vlan, u8 qos);
804 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
805 int vf, int rate);
806 int (*ndo_get_vf_config)(struct net_device *dev,
807 int vf,
808 struct ifla_vf_info *ivf);
809 int (*ndo_set_vf_port)(struct net_device *dev,
810 int vf,
811 struct nlattr *port[]);
812 int (*ndo_get_vf_port)(struct net_device *dev,
813 int vf, struct sk_buff *skb);
814 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
815 int (*ndo_fcoe_enable)(struct net_device *dev);
816 int (*ndo_fcoe_disable)(struct net_device *dev);
817 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
818 u16 xid,
819 struct scatterlist *sgl,
820 unsigned int sgc);
821 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
822 u16 xid);
823 #define NETDEV_FCOE_WWNN 0
824 #define NETDEV_FCOE_WWPN 1
825 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
826 u64 *wwn, int type);
827 #endif
831 * The DEVICE structure.
832 * Actually, this whole structure is a big mistake. It mixes I/O
833 * data with strictly "high-level" data, and it has to know about
834 * almost every data structure used in the INET module.
836 * FIXME: cleanup struct net_device such that network protocol info
837 * moves out.
840 struct net_device {
843 * This is the first field of the "visible" part of this structure
844 * (i.e. as seen by users in the "Space.c" file). It is the name
845 * of the interface.
847 char name[IFNAMSIZ];
849 struct pm_qos_request_list pm_qos_req;
851 /* device name hash chain */
852 struct hlist_node name_hlist;
853 /* snmp alias */
854 char *ifalias;
857 * I/O specific fields
858 * FIXME: Merge these and struct ifmap into one
860 unsigned long mem_end; /* shared mem end */
861 unsigned long mem_start; /* shared mem start */
862 unsigned long base_addr; /* device I/O address */
863 unsigned int irq; /* device IRQ number */
866 * Some hardware also needs these fields, but they are not
867 * part of the usual set specified in Space.c.
870 unsigned char if_port; /* Selectable AUI, TP,..*/
871 unsigned char dma; /* DMA channel */
873 unsigned long state;
875 struct list_head dev_list;
876 struct list_head napi_list;
877 struct list_head unreg_list;
879 /* Net device features */
880 unsigned long features;
881 #define NETIF_F_SG 1 /* Scatter/gather IO. */
882 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
883 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
884 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
885 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
886 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
887 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
888 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
889 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
890 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
891 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
892 #define NETIF_F_GSO 2048 /* Enable software GSO. */
893 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
894 /* do not use LLTX in new drivers */
895 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
896 #define NETIF_F_GRO 16384 /* Generic receive offload */
897 #define NETIF_F_LRO 32768 /* large receive offload */
899 /* the GSO_MASK reserves bits 16 through 23 */
900 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
901 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
902 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
903 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
904 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
906 /* Segmentation offload features */
907 #define NETIF_F_GSO_SHIFT 16
908 #define NETIF_F_GSO_MASK 0x00ff0000
909 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
910 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
911 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
912 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
913 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
914 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
916 /* List of features with software fallbacks. */
917 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
918 NETIF_F_TSO6 | NETIF_F_UFO)
921 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
922 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
923 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
924 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
927 * If one device supports one of these features, then enable them
928 * for all in netdev_increment_features.
930 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
931 NETIF_F_SG | NETIF_F_HIGHDMA | \
932 NETIF_F_FRAGLIST)
934 /* Interface index. Unique device identifier */
935 int ifindex;
936 int iflink;
938 struct net_device_stats stats;
939 atomic_long_t rx_dropped; /* dropped packets by core network
940 * Do not use this in drivers.
943 #ifdef CONFIG_WIRELESS_EXT
944 /* List of functions to handle Wireless Extensions (instead of ioctl).
945 * See <net/iw_handler.h> for details. Jean II */
946 const struct iw_handler_def * wireless_handlers;
947 /* Instance data managed by the core of Wireless Extensions. */
948 struct iw_public_data * wireless_data;
949 #endif
950 /* Management operations */
951 const struct net_device_ops *netdev_ops;
952 const struct ethtool_ops *ethtool_ops;
954 /* Hardware header description */
955 const struct header_ops *header_ops;
957 unsigned int flags; /* interface flags (a la BSD) */
958 unsigned short gflags;
959 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
960 unsigned short padded; /* How much padding added by alloc_netdev() */
962 unsigned char operstate; /* RFC2863 operstate */
963 unsigned char link_mode; /* mapping policy to operstate */
965 unsigned int mtu; /* interface MTU value */
966 unsigned short type; /* interface hardware type */
967 unsigned short hard_header_len; /* hardware hdr length */
969 /* extra head- and tailroom the hardware may need, but not in all cases
970 * can this be guaranteed, especially tailroom. Some cases also use
971 * LL_MAX_HEADER instead to allocate the skb.
973 unsigned short needed_headroom;
974 unsigned short needed_tailroom;
976 /* Interface address info. */
977 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
978 unsigned char addr_assign_type; /* hw address assignment type */
979 unsigned char addr_len; /* hardware address length */
980 unsigned short dev_id; /* for shared network cards */
982 spinlock_t addr_list_lock;
983 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
984 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
985 int uc_promisc;
986 unsigned int promiscuity;
987 unsigned int allmulti;
990 /* Protocol specific pointers */
992 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
993 struct vlan_group __rcu *vlgrp; /* VLAN group */
994 #endif
995 #ifdef CONFIG_NET_DSA
996 void *dsa_ptr; /* dsa specific data */
997 #endif
998 void *atalk_ptr; /* AppleTalk link */
999 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
1000 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
1001 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
1002 void *ec_ptr; /* Econet specific data */
1003 void *ax25_ptr; /* AX.25 specific data */
1004 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1005 assign before registering */
1008 * Cache lines mostly used on receive path (including eth_type_trans())
1010 unsigned long last_rx; /* Time of last Rx
1011 * This should not be set in
1012 * drivers, unless really needed,
1013 * because network stack (bonding)
1014 * use it if/when necessary, to
1015 * avoid dirtying this cache line.
1018 struct net_device *master; /* Pointer to master device of a group,
1019 * which this device is member of.
1022 /* Interface address info used in eth_type_trans() */
1023 unsigned char *dev_addr; /* hw address, (before bcast
1024 because most packets are
1025 unicast) */
1027 struct netdev_hw_addr_list dev_addrs; /* list of device
1028 hw addresses */
1030 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1032 #ifdef CONFIG_RPS
1033 struct kset *queues_kset;
1035 struct netdev_rx_queue *_rx;
1037 /* Number of RX queues allocated at register_netdev() time */
1038 unsigned int num_rx_queues;
1040 /* Number of RX queues currently active in device */
1041 unsigned int real_num_rx_queues;
1042 #endif
1044 rx_handler_func_t __rcu *rx_handler;
1045 void __rcu *rx_handler_data;
1047 struct netdev_queue __rcu *ingress_queue;
1050 * Cache lines mostly used on transmit path
1052 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
1054 /* Number of TX queues allocated at alloc_netdev_mq() time */
1055 unsigned int num_tx_queues;
1057 /* Number of TX queues currently active in device */
1058 unsigned int real_num_tx_queues;
1060 /* root qdisc from userspace point of view */
1061 struct Qdisc *qdisc;
1063 unsigned long tx_queue_len; /* Max frames per queue allowed */
1064 spinlock_t tx_global_lock;
1066 #ifdef CONFIG_XPS
1067 struct xps_dev_maps __rcu *xps_maps;
1068 #endif
1070 /* These may be needed for future network-power-down code. */
1073 * trans_start here is expensive for high speed devices on SMP,
1074 * please use netdev_queue->trans_start instead.
1076 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1078 int watchdog_timeo; /* used by dev_watchdog() */
1079 struct timer_list watchdog_timer;
1081 /* Number of references to this device */
1082 int __percpu *pcpu_refcnt;
1084 /* delayed register/unregister */
1085 struct list_head todo_list;
1086 /* device index hash chain */
1087 struct hlist_node index_hlist;
1089 struct list_head link_watch_list;
1091 /* register/unregister state machine */
1092 enum { NETREG_UNINITIALIZED=0,
1093 NETREG_REGISTERED, /* completed register_netdevice */
1094 NETREG_UNREGISTERING, /* called unregister_netdevice */
1095 NETREG_UNREGISTERED, /* completed unregister todo */
1096 NETREG_RELEASED, /* called free_netdev */
1097 NETREG_DUMMY, /* dummy device for NAPI poll */
1098 } reg_state:16;
1100 enum {
1101 RTNL_LINK_INITIALIZED,
1102 RTNL_LINK_INITIALIZING,
1103 } rtnl_link_state:16;
1105 /* Called from unregister, can be used to call free_netdev */
1106 void (*destructor)(struct net_device *dev);
1108 #ifdef CONFIG_NETPOLL
1109 struct netpoll_info *npinfo;
1110 #endif
1112 #ifdef CONFIG_NET_NS
1113 /* Network namespace this network device is inside */
1114 struct net *nd_net;
1115 #endif
1117 /* mid-layer private */
1118 union {
1119 void *ml_priv;
1120 struct pcpu_lstats __percpu *lstats; /* loopback stats */
1121 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
1122 struct pcpu_dstats __percpu *dstats; /* dummy stats */
1124 /* GARP */
1125 struct garp_port __rcu *garp_port;
1127 /* class/net/name entry */
1128 struct device dev;
1129 /* space for optional device, statistics, and wireless sysfs groups */
1130 const struct attribute_group *sysfs_groups[4];
1132 /* rtnetlink link ops */
1133 const struct rtnl_link_ops *rtnl_link_ops;
1135 /* VLAN feature mask */
1136 unsigned long vlan_features;
1138 /* for setting kernel sock attribute on TCP connection setup */
1139 #define GSO_MAX_SIZE 65536
1140 unsigned int gso_max_size;
1142 #ifdef CONFIG_DCB
1143 /* Data Center Bridging netlink ops */
1144 const struct dcbnl_rtnl_ops *dcbnl_ops;
1145 #endif
1147 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1148 /* max exchange id for FCoE LRO by ddp */
1149 unsigned int fcoe_ddp_xid;
1150 #endif
1151 /* n-tuple filter list attached to this device */
1152 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1154 /* phy device may attach itself for hardware timestamping */
1155 struct phy_device *phydev;
1157 #define to_net_dev(d) container_of(d, struct net_device, dev)
1159 #define NETDEV_ALIGN 32
1161 static inline
1162 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1163 unsigned int index)
1165 return &dev->_tx[index];
1168 static inline void netdev_for_each_tx_queue(struct net_device *dev,
1169 void (*f)(struct net_device *,
1170 struct netdev_queue *,
1171 void *),
1172 void *arg)
1174 unsigned int i;
1176 for (i = 0; i < dev->num_tx_queues; i++)
1177 f(dev, &dev->_tx[i], arg);
1181 * Net namespace inlines
1183 static inline
1184 struct net *dev_net(const struct net_device *dev)
1186 return read_pnet(&dev->nd_net);
1189 static inline
1190 void dev_net_set(struct net_device *dev, struct net *net)
1192 #ifdef CONFIG_NET_NS
1193 release_net(dev->nd_net);
1194 dev->nd_net = hold_net(net);
1195 #endif
1198 static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1200 #ifdef CONFIG_NET_DSA_TAG_DSA
1201 if (dev->dsa_ptr != NULL)
1202 return dsa_uses_dsa_tags(dev->dsa_ptr);
1203 #endif
1205 return 0;
1208 #ifndef CONFIG_NET_NS
1209 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1211 skb->dev = dev;
1213 #else /* CONFIG_NET_NS */
1214 void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1215 #endif
1217 static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1219 #ifdef CONFIG_NET_DSA_TAG_TRAILER
1220 if (dev->dsa_ptr != NULL)
1221 return dsa_uses_trailer_tags(dev->dsa_ptr);
1222 #endif
1224 return 0;
1228 * netdev_priv - access network device private data
1229 * @dev: network device
1231 * Get network device private data
1233 static inline void *netdev_priv(const struct net_device *dev)
1235 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1238 /* Set the sysfs physical device reference for the network logical device
1239 * if set prior to registration will cause a symlink during initialization.
1241 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1243 /* Set the sysfs device type for the network logical device to allow
1244 * fin grained indentification of different network device types. For
1245 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1247 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1250 * netif_napi_add - initialize a napi context
1251 * @dev: network device
1252 * @napi: napi context
1253 * @poll: polling function
1254 * @weight: default weight
1256 * netif_napi_add() must be used to initialize a napi context prior to calling
1257 * *any* of the other napi related functions.
1259 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1260 int (*poll)(struct napi_struct *, int), int weight);
1263 * netif_napi_del - remove a napi context
1264 * @napi: napi context
1266 * netif_napi_del() removes a napi context from the network device napi list
1268 void netif_napi_del(struct napi_struct *napi);
1270 struct napi_gro_cb {
1271 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1272 void *frag0;
1274 /* Length of frag0. */
1275 unsigned int frag0_len;
1277 /* This indicates where we are processing relative to skb->data. */
1278 int data_offset;
1280 /* This is non-zero if the packet may be of the same flow. */
1281 int same_flow;
1283 /* This is non-zero if the packet cannot be merged with the new skb. */
1284 int flush;
1286 /* Number of segments aggregated. */
1287 int count;
1289 /* Free the skb? */
1290 int free;
1293 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1295 struct packet_type {
1296 __be16 type; /* This is really htons(ether_type). */
1297 struct net_device *dev; /* NULL is wildcarded here */
1298 int (*func) (struct sk_buff *,
1299 struct net_device *,
1300 struct packet_type *,
1301 struct net_device *);
1302 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1303 int features);
1304 int (*gso_send_check)(struct sk_buff *skb);
1305 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1306 struct sk_buff *skb);
1307 int (*gro_complete)(struct sk_buff *skb);
1308 void *af_packet_priv;
1309 struct list_head list;
1312 #include <linux/interrupt.h>
1313 #include <linux/notifier.h>
1315 extern rwlock_t dev_base_lock; /* Device list lock */
1318 #define for_each_netdev(net, d) \
1319 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1320 #define for_each_netdev_reverse(net, d) \
1321 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1322 #define for_each_netdev_rcu(net, d) \
1323 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1324 #define for_each_netdev_safe(net, d, n) \
1325 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1326 #define for_each_netdev_continue(net, d) \
1327 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1328 #define for_each_netdev_continue_rcu(net, d) \
1329 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1330 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1332 static inline struct net_device *next_net_device(struct net_device *dev)
1334 struct list_head *lh;
1335 struct net *net;
1337 net = dev_net(dev);
1338 lh = dev->dev_list.next;
1339 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1342 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1344 struct list_head *lh;
1345 struct net *net;
1347 net = dev_net(dev);
1348 lh = rcu_dereference(dev->dev_list.next);
1349 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1352 static inline struct net_device *first_net_device(struct net *net)
1354 return list_empty(&net->dev_base_head) ? NULL :
1355 net_device_entry(net->dev_base_head.next);
1358 extern int netdev_boot_setup_check(struct net_device *dev);
1359 extern unsigned long netdev_boot_base(const char *prefix, int unit);
1360 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1361 const char *hwaddr);
1362 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1363 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1364 extern void dev_add_pack(struct packet_type *pt);
1365 extern void dev_remove_pack(struct packet_type *pt);
1366 extern void __dev_remove_pack(struct packet_type *pt);
1368 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1369 unsigned short mask);
1370 extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1371 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1372 extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1373 extern int dev_alloc_name(struct net_device *dev, const char *name);
1374 extern int dev_open(struct net_device *dev);
1375 extern int dev_close(struct net_device *dev);
1376 extern void dev_disable_lro(struct net_device *dev);
1377 extern int dev_queue_xmit(struct sk_buff *skb);
1378 extern int register_netdevice(struct net_device *dev);
1379 extern void unregister_netdevice_queue(struct net_device *dev,
1380 struct list_head *head);
1381 extern void unregister_netdevice_many(struct list_head *head);
1382 static inline void unregister_netdevice(struct net_device *dev)
1384 unregister_netdevice_queue(dev, NULL);
1387 extern int netdev_refcnt_read(const struct net_device *dev);
1388 extern void free_netdev(struct net_device *dev);
1389 extern void synchronize_net(void);
1390 extern int register_netdevice_notifier(struct notifier_block *nb);
1391 extern int unregister_netdevice_notifier(struct notifier_block *nb);
1392 extern int init_dummy_netdev(struct net_device *dev);
1393 extern void netdev_resync_ops(struct net_device *dev);
1395 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1396 extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1397 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1398 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1399 extern int dev_restart(struct net_device *dev);
1400 #ifdef CONFIG_NETPOLL_TRAP
1401 extern int netpoll_trap(void);
1402 #endif
1403 extern int skb_gro_receive(struct sk_buff **head,
1404 struct sk_buff *skb);
1405 extern void skb_gro_reset_offset(struct sk_buff *skb);
1407 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1409 return NAPI_GRO_CB(skb)->data_offset;
1412 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1414 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1417 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1419 NAPI_GRO_CB(skb)->data_offset += len;
1422 static inline void *skb_gro_header_fast(struct sk_buff *skb,
1423 unsigned int offset)
1425 return NAPI_GRO_CB(skb)->frag0 + offset;
1428 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1430 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1433 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1434 unsigned int offset)
1436 NAPI_GRO_CB(skb)->frag0 = NULL;
1437 NAPI_GRO_CB(skb)->frag0_len = 0;
1438 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1441 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1443 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1446 static inline void *skb_gro_network_header(struct sk_buff *skb)
1448 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1449 skb_network_offset(skb);
1452 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1453 unsigned short type,
1454 const void *daddr, const void *saddr,
1455 unsigned len)
1457 if (!dev->header_ops || !dev->header_ops->create)
1458 return 0;
1460 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1463 static inline int dev_parse_header(const struct sk_buff *skb,
1464 unsigned char *haddr)
1466 const struct net_device *dev = skb->dev;
1468 if (!dev->header_ops || !dev->header_ops->parse)
1469 return 0;
1470 return dev->header_ops->parse(skb, haddr);
1473 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1474 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1475 static inline int unregister_gifconf(unsigned int family)
1477 return register_gifconf(family, NULL);
1481 * Incoming packets are placed on per-cpu queues
1483 struct softnet_data {
1484 struct Qdisc *output_queue;
1485 struct Qdisc **output_queue_tailp;
1486 struct list_head poll_list;
1487 struct sk_buff *completion_queue;
1488 struct sk_buff_head process_queue;
1490 /* stats */
1491 unsigned int processed;
1492 unsigned int time_squeeze;
1493 unsigned int cpu_collision;
1494 unsigned int received_rps;
1496 #ifdef CONFIG_RPS
1497 struct softnet_data *rps_ipi_list;
1499 /* Elements below can be accessed between CPUs for RPS */
1500 struct call_single_data csd ____cacheline_aligned_in_smp;
1501 struct softnet_data *rps_ipi_next;
1502 unsigned int cpu;
1503 unsigned int input_queue_head;
1504 unsigned int input_queue_tail;
1505 #endif
1506 unsigned dropped;
1507 struct sk_buff_head input_pkt_queue;
1508 struct napi_struct backlog;
1511 static inline void input_queue_head_incr(struct softnet_data *sd)
1513 #ifdef CONFIG_RPS
1514 sd->input_queue_head++;
1515 #endif
1518 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1519 unsigned int *qtail)
1521 #ifdef CONFIG_RPS
1522 *qtail = ++sd->input_queue_tail;
1523 #endif
1526 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
1528 #define HAVE_NETIF_QUEUE
1530 extern void __netif_schedule(struct Qdisc *q);
1532 static inline void netif_schedule_queue(struct netdev_queue *txq)
1534 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1535 __netif_schedule(txq->qdisc);
1538 static inline void netif_tx_schedule_all(struct net_device *dev)
1540 unsigned int i;
1542 for (i = 0; i < dev->num_tx_queues; i++)
1543 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1546 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1548 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1552 * netif_start_queue - allow transmit
1553 * @dev: network device
1555 * Allow upper layers to call the device hard_start_xmit routine.
1557 static inline void netif_start_queue(struct net_device *dev)
1559 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1562 static inline void netif_tx_start_all_queues(struct net_device *dev)
1564 unsigned int i;
1566 for (i = 0; i < dev->num_tx_queues; i++) {
1567 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1568 netif_tx_start_queue(txq);
1572 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1574 #ifdef CONFIG_NETPOLL_TRAP
1575 if (netpoll_trap()) {
1576 netif_tx_start_queue(dev_queue);
1577 return;
1579 #endif
1580 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1581 __netif_schedule(dev_queue->qdisc);
1585 * netif_wake_queue - restart transmit
1586 * @dev: network device
1588 * Allow upper layers to call the device hard_start_xmit routine.
1589 * Used for flow control when transmit resources are available.
1591 static inline void netif_wake_queue(struct net_device *dev)
1593 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1596 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1598 unsigned int i;
1600 for (i = 0; i < dev->num_tx_queues; i++) {
1601 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1602 netif_tx_wake_queue(txq);
1606 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1608 if (WARN_ON(!dev_queue)) {
1609 printk(KERN_INFO "netif_stop_queue() cannot be called before "
1610 "register_netdev()");
1611 return;
1613 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1617 * netif_stop_queue - stop transmitted packets
1618 * @dev: network device
1620 * Stop upper layers calling the device hard_start_xmit routine.
1621 * Used for flow control when transmit resources are unavailable.
1623 static inline void netif_stop_queue(struct net_device *dev)
1625 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1628 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1630 unsigned int i;
1632 for (i = 0; i < dev->num_tx_queues; i++) {
1633 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1634 netif_tx_stop_queue(txq);
1638 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1640 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1644 * netif_queue_stopped - test if transmit queue is flowblocked
1645 * @dev: network device
1647 * Test if transmit queue on device is currently unable to send.
1649 static inline int netif_queue_stopped(const struct net_device *dev)
1651 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1654 static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
1656 return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
1660 * netif_running - test if up
1661 * @dev: network device
1663 * Test if the device has been brought up.
1665 static inline int netif_running(const struct net_device *dev)
1667 return test_bit(__LINK_STATE_START, &dev->state);
1671 * Routines to manage the subqueues on a device. We only need start
1672 * stop, and a check if it's stopped. All other device management is
1673 * done at the overall netdevice level.
1674 * Also test the device if we're multiqueue.
1678 * netif_start_subqueue - allow sending packets on subqueue
1679 * @dev: network device
1680 * @queue_index: sub queue index
1682 * Start individual transmit queue of a device with multiple transmit queues.
1684 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1686 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1688 netif_tx_start_queue(txq);
1692 * netif_stop_subqueue - stop sending packets on subqueue
1693 * @dev: network device
1694 * @queue_index: sub queue index
1696 * Stop individual transmit queue of a device with multiple transmit queues.
1698 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1700 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1701 #ifdef CONFIG_NETPOLL_TRAP
1702 if (netpoll_trap())
1703 return;
1704 #endif
1705 netif_tx_stop_queue(txq);
1709 * netif_subqueue_stopped - test status of subqueue
1710 * @dev: network device
1711 * @queue_index: sub queue index
1713 * Check individual transmit queue of a device with multiple transmit queues.
1715 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1716 u16 queue_index)
1718 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1720 return netif_tx_queue_stopped(txq);
1723 static inline int netif_subqueue_stopped(const struct net_device *dev,
1724 struct sk_buff *skb)
1726 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1730 * netif_wake_subqueue - allow sending packets on subqueue
1731 * @dev: network device
1732 * @queue_index: sub queue index
1734 * Resume individual transmit queue of a device with multiple transmit queues.
1736 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1738 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1739 #ifdef CONFIG_NETPOLL_TRAP
1740 if (netpoll_trap())
1741 return;
1742 #endif
1743 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1744 __netif_schedule(txq->qdisc);
1748 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
1749 * as a distribution range limit for the returned value.
1751 static inline u16 skb_tx_hash(const struct net_device *dev,
1752 const struct sk_buff *skb)
1754 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
1758 * netif_is_multiqueue - test if device has multiple transmit queues
1759 * @dev: network device
1761 * Check if device has multiple transmit queues
1763 static inline int netif_is_multiqueue(const struct net_device *dev)
1765 return dev->num_tx_queues > 1;
1768 extern int netif_set_real_num_tx_queues(struct net_device *dev,
1769 unsigned int txq);
1771 #ifdef CONFIG_RPS
1772 extern int netif_set_real_num_rx_queues(struct net_device *dev,
1773 unsigned int rxq);
1774 #else
1775 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
1776 unsigned int rxq)
1778 return 0;
1780 #endif
1782 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
1783 const struct net_device *from_dev)
1785 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
1786 #ifdef CONFIG_RPS
1787 return netif_set_real_num_rx_queues(to_dev,
1788 from_dev->real_num_rx_queues);
1789 #else
1790 return 0;
1791 #endif
1794 /* Use this variant when it is known for sure that it
1795 * is executing from hardware interrupt context or with hardware interrupts
1796 * disabled.
1798 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1800 /* Use this variant in places where it could be invoked
1801 * from either hardware interrupt or other context, with hardware interrupts
1802 * either disabled or enabled.
1804 extern void dev_kfree_skb_any(struct sk_buff *skb);
1806 #define HAVE_NETIF_RX 1
1807 extern int netif_rx(struct sk_buff *skb);
1808 extern int netif_rx_ni(struct sk_buff *skb);
1809 #define HAVE_NETIF_RECEIVE_SKB 1
1810 extern int netif_receive_skb(struct sk_buff *skb);
1811 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1812 struct sk_buff *skb);
1813 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1814 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1815 struct sk_buff *skb);
1816 extern void napi_gro_flush(struct napi_struct *napi);
1817 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1818 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1819 struct sk_buff *skb,
1820 gro_result_t ret);
1821 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1822 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1824 static inline void napi_free_frags(struct napi_struct *napi)
1826 kfree_skb(napi->skb);
1827 napi->skb = NULL;
1830 extern int netdev_rx_handler_register(struct net_device *dev,
1831 rx_handler_func_t *rx_handler,
1832 void *rx_handler_data);
1833 extern void netdev_rx_handler_unregister(struct net_device *dev);
1835 extern int dev_valid_name(const char *name);
1836 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1837 extern int dev_ethtool(struct net *net, struct ifreq *);
1838 extern unsigned dev_get_flags(const struct net_device *);
1839 extern int __dev_change_flags(struct net_device *, unsigned int flags);
1840 extern int dev_change_flags(struct net_device *, unsigned);
1841 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
1842 extern int dev_change_name(struct net_device *, const char *);
1843 extern int dev_set_alias(struct net_device *, const char *, size_t);
1844 extern int dev_change_net_namespace(struct net_device *,
1845 struct net *, const char *);
1846 extern int dev_set_mtu(struct net_device *, int);
1847 extern int dev_set_mac_address(struct net_device *,
1848 struct sockaddr *);
1849 extern int dev_hard_start_xmit(struct sk_buff *skb,
1850 struct net_device *dev,
1851 struct netdev_queue *txq);
1852 extern int dev_forward_skb(struct net_device *dev,
1853 struct sk_buff *skb);
1855 extern int netdev_budget;
1857 /* Called by rtnetlink.c:rtnl_unlock() */
1858 extern void netdev_run_todo(void);
1861 * dev_put - release reference to device
1862 * @dev: network device
1864 * Release reference to device to allow it to be freed.
1866 static inline void dev_put(struct net_device *dev)
1868 irqsafe_cpu_dec(*dev->pcpu_refcnt);
1872 * dev_hold - get reference to device
1873 * @dev: network device
1875 * Hold reference to device to keep it from being freed.
1877 static inline void dev_hold(struct net_device *dev)
1879 irqsafe_cpu_inc(*dev->pcpu_refcnt);
1882 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1883 * and _off may be called from IRQ context, but it is caller
1884 * who is responsible for serialization of these calls.
1886 * The name carrier is inappropriate, these functions should really be
1887 * called netif_lowerlayer_*() because they represent the state of any
1888 * kind of lower layer not just hardware media.
1891 extern void linkwatch_fire_event(struct net_device *dev);
1892 extern void linkwatch_forget_dev(struct net_device *dev);
1895 * netif_carrier_ok - test if carrier present
1896 * @dev: network device
1898 * Check if carrier is present on device
1900 static inline int netif_carrier_ok(const struct net_device *dev)
1902 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1905 extern unsigned long dev_trans_start(struct net_device *dev);
1907 extern void __netdev_watchdog_up(struct net_device *dev);
1909 extern void netif_carrier_on(struct net_device *dev);
1911 extern void netif_carrier_off(struct net_device *dev);
1913 extern void netif_notify_peers(struct net_device *dev);
1916 * netif_dormant_on - mark device as dormant.
1917 * @dev: network device
1919 * Mark device as dormant (as per RFC2863).
1921 * The dormant state indicates that the relevant interface is not
1922 * actually in a condition to pass packets (i.e., it is not 'up') but is
1923 * in a "pending" state, waiting for some external event. For "on-
1924 * demand" interfaces, this new state identifies the situation where the
1925 * interface is waiting for events to place it in the up state.
1928 static inline void netif_dormant_on(struct net_device *dev)
1930 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1931 linkwatch_fire_event(dev);
1935 * netif_dormant_off - set device as not dormant.
1936 * @dev: network device
1938 * Device is not in dormant state.
1940 static inline void netif_dormant_off(struct net_device *dev)
1942 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1943 linkwatch_fire_event(dev);
1947 * netif_dormant - test if carrier present
1948 * @dev: network device
1950 * Check if carrier is present on device
1952 static inline int netif_dormant(const struct net_device *dev)
1954 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1959 * netif_oper_up - test if device is operational
1960 * @dev: network device
1962 * Check if carrier is operational
1964 static inline int netif_oper_up(const struct net_device *dev)
1966 return (dev->operstate == IF_OPER_UP ||
1967 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1971 * netif_device_present - is device available or removed
1972 * @dev: network device
1974 * Check if device has not been removed from system.
1976 static inline int netif_device_present(struct net_device *dev)
1978 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1981 extern void netif_device_detach(struct net_device *dev);
1983 extern void netif_device_attach(struct net_device *dev);
1986 * Network interface message level settings
1988 #define HAVE_NETIF_MSG 1
1990 enum {
1991 NETIF_MSG_DRV = 0x0001,
1992 NETIF_MSG_PROBE = 0x0002,
1993 NETIF_MSG_LINK = 0x0004,
1994 NETIF_MSG_TIMER = 0x0008,
1995 NETIF_MSG_IFDOWN = 0x0010,
1996 NETIF_MSG_IFUP = 0x0020,
1997 NETIF_MSG_RX_ERR = 0x0040,
1998 NETIF_MSG_TX_ERR = 0x0080,
1999 NETIF_MSG_TX_QUEUED = 0x0100,
2000 NETIF_MSG_INTR = 0x0200,
2001 NETIF_MSG_TX_DONE = 0x0400,
2002 NETIF_MSG_RX_STATUS = 0x0800,
2003 NETIF_MSG_PKTDATA = 0x1000,
2004 NETIF_MSG_HW = 0x2000,
2005 NETIF_MSG_WOL = 0x4000,
2008 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2009 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2010 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2011 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2012 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2013 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2014 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2015 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2016 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2017 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2018 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2019 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2020 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2021 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2022 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2024 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2026 /* use default */
2027 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2028 return default_msg_enable_bits;
2029 if (debug_value == 0) /* no output */
2030 return 0;
2031 /* set low N bits */
2032 return (1 << debug_value) - 1;
2035 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
2037 spin_lock(&txq->_xmit_lock);
2038 txq->xmit_lock_owner = cpu;
2041 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2043 spin_lock_bh(&txq->_xmit_lock);
2044 txq->xmit_lock_owner = smp_processor_id();
2047 static inline int __netif_tx_trylock(struct netdev_queue *txq)
2049 int ok = spin_trylock(&txq->_xmit_lock);
2050 if (likely(ok))
2051 txq->xmit_lock_owner = smp_processor_id();
2052 return ok;
2055 static inline void __netif_tx_unlock(struct netdev_queue *txq)
2057 txq->xmit_lock_owner = -1;
2058 spin_unlock(&txq->_xmit_lock);
2061 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2063 txq->xmit_lock_owner = -1;
2064 spin_unlock_bh(&txq->_xmit_lock);
2067 static inline void txq_trans_update(struct netdev_queue *txq)
2069 if (txq->xmit_lock_owner != -1)
2070 txq->trans_start = jiffies;
2074 * netif_tx_lock - grab network device transmit lock
2075 * @dev: network device
2077 * Get network device transmit lock
2079 static inline void netif_tx_lock(struct net_device *dev)
2081 unsigned int i;
2082 int cpu;
2084 spin_lock(&dev->tx_global_lock);
2085 cpu = smp_processor_id();
2086 for (i = 0; i < dev->num_tx_queues; i++) {
2087 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2089 /* We are the only thread of execution doing a
2090 * freeze, but we have to grab the _xmit_lock in
2091 * order to synchronize with threads which are in
2092 * the ->hard_start_xmit() handler and already
2093 * checked the frozen bit.
2095 __netif_tx_lock(txq, cpu);
2096 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2097 __netif_tx_unlock(txq);
2101 static inline void netif_tx_lock_bh(struct net_device *dev)
2103 local_bh_disable();
2104 netif_tx_lock(dev);
2107 static inline void netif_tx_unlock(struct net_device *dev)
2109 unsigned int i;
2111 for (i = 0; i < dev->num_tx_queues; i++) {
2112 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2114 /* No need to grab the _xmit_lock here. If the
2115 * queue is not stopped for another reason, we
2116 * force a schedule.
2118 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2119 netif_schedule_queue(txq);
2121 spin_unlock(&dev->tx_global_lock);
2124 static inline void netif_tx_unlock_bh(struct net_device *dev)
2126 netif_tx_unlock(dev);
2127 local_bh_enable();
2130 #define HARD_TX_LOCK(dev, txq, cpu) { \
2131 if ((dev->features & NETIF_F_LLTX) == 0) { \
2132 __netif_tx_lock(txq, cpu); \
2136 #define HARD_TX_UNLOCK(dev, txq) { \
2137 if ((dev->features & NETIF_F_LLTX) == 0) { \
2138 __netif_tx_unlock(txq); \
2142 static inline void netif_tx_disable(struct net_device *dev)
2144 unsigned int i;
2145 int cpu;
2147 local_bh_disable();
2148 cpu = smp_processor_id();
2149 for (i = 0; i < dev->num_tx_queues; i++) {
2150 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2152 __netif_tx_lock(txq, cpu);
2153 netif_tx_stop_queue(txq);
2154 __netif_tx_unlock(txq);
2156 local_bh_enable();
2159 static inline void netif_addr_lock(struct net_device *dev)
2161 spin_lock(&dev->addr_list_lock);
2164 static inline void netif_addr_lock_bh(struct net_device *dev)
2166 spin_lock_bh(&dev->addr_list_lock);
2169 static inline void netif_addr_unlock(struct net_device *dev)
2171 spin_unlock(&dev->addr_list_lock);
2174 static inline void netif_addr_unlock_bh(struct net_device *dev)
2176 spin_unlock_bh(&dev->addr_list_lock);
2180 * dev_addrs walker. Should be used only for read access. Call with
2181 * rcu_read_lock held.
2183 #define for_each_dev_addr(dev, ha) \
2184 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2186 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
2188 extern void ether_setup(struct net_device *dev);
2190 /* Support for loadable net-drivers */
2191 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2192 void (*setup)(struct net_device *),
2193 unsigned int txqs, unsigned int rxqs);
2194 #define alloc_netdev(sizeof_priv, name, setup) \
2195 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2197 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2198 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2200 extern int register_netdev(struct net_device *dev);
2201 extern void unregister_netdev(struct net_device *dev);
2203 /* General hardware address lists handling functions */
2204 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2205 struct netdev_hw_addr_list *from_list,
2206 int addr_len, unsigned char addr_type);
2207 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2208 struct netdev_hw_addr_list *from_list,
2209 int addr_len, unsigned char addr_type);
2210 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2211 struct netdev_hw_addr_list *from_list,
2212 int addr_len);
2213 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2214 struct netdev_hw_addr_list *from_list,
2215 int addr_len);
2216 extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2217 extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2219 /* Functions used for device addresses handling */
2220 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2221 unsigned char addr_type);
2222 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2223 unsigned char addr_type);
2224 extern int dev_addr_add_multiple(struct net_device *to_dev,
2225 struct net_device *from_dev,
2226 unsigned char addr_type);
2227 extern int dev_addr_del_multiple(struct net_device *to_dev,
2228 struct net_device *from_dev,
2229 unsigned char addr_type);
2230 extern void dev_addr_flush(struct net_device *dev);
2231 extern int dev_addr_init(struct net_device *dev);
2233 /* Functions used for unicast addresses handling */
2234 extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2235 extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2236 extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2237 extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2238 extern void dev_uc_flush(struct net_device *dev);
2239 extern void dev_uc_init(struct net_device *dev);
2241 /* Functions used for multicast addresses handling */
2242 extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2243 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2244 extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2245 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2246 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2247 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2248 extern void dev_mc_flush(struct net_device *dev);
2249 extern void dev_mc_init(struct net_device *dev);
2251 /* Functions used for secondary unicast and multicast support */
2252 extern void dev_set_rx_mode(struct net_device *dev);
2253 extern void __dev_set_rx_mode(struct net_device *dev);
2254 extern int dev_set_promiscuity(struct net_device *dev, int inc);
2255 extern int dev_set_allmulti(struct net_device *dev, int inc);
2256 extern void netdev_state_change(struct net_device *dev);
2257 extern int netdev_bonding_change(struct net_device *dev,
2258 unsigned long event);
2259 extern void netdev_features_change(struct net_device *dev);
2260 /* Load a device via the kmod */
2261 extern void dev_load(struct net *net, const char *name);
2262 extern void dev_mcast_init(void);
2263 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2264 struct rtnl_link_stats64 *storage);
2266 extern int netdev_max_backlog;
2267 extern int netdev_tstamp_prequeue;
2268 extern int weight_p;
2269 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2270 extern int skb_checksum_help(struct sk_buff *skb);
2271 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2272 #ifdef CONFIG_BUG
2273 extern void netdev_rx_csum_fault(struct net_device *dev);
2274 #else
2275 static inline void netdev_rx_csum_fault(struct net_device *dev)
2278 #endif
2279 /* rx skb timestamps */
2280 extern void net_enable_timestamp(void);
2281 extern void net_disable_timestamp(void);
2283 #ifdef CONFIG_PROC_FS
2284 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2285 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2286 extern void dev_seq_stop(struct seq_file *seq, void *v);
2287 #endif
2289 extern int netdev_class_create_file(struct class_attribute *class_attr);
2290 extern void netdev_class_remove_file(struct class_attribute *class_attr);
2292 extern struct kobj_ns_type_operations net_ns_type_operations;
2294 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2296 extern void linkwatch_run_queue(void);
2298 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2299 unsigned long mask);
2300 unsigned long netdev_fix_features(unsigned long features, const char *name);
2302 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2303 struct net_device *dev);
2305 int netif_skb_features(struct sk_buff *skb);
2307 static inline int net_gso_ok(int features, int gso_type)
2309 int feature = gso_type << NETIF_F_GSO_SHIFT;
2310 return (features & feature) == feature;
2313 static inline int skb_gso_ok(struct sk_buff *skb, int features)
2315 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2316 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2319 static inline int netif_needs_gso(struct sk_buff *skb, int features)
2321 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2322 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2325 static inline void netif_set_gso_max_size(struct net_device *dev,
2326 unsigned int size)
2328 dev->gso_max_size = size;
2331 extern int __skb_bond_should_drop(struct sk_buff *skb,
2332 struct net_device *master);
2334 static inline int skb_bond_should_drop(struct sk_buff *skb,
2335 struct net_device *master)
2337 if (master)
2338 return __skb_bond_should_drop(skb, master);
2339 return 0;
2342 extern struct pernet_operations __net_initdata loopback_net_ops;
2344 static inline int dev_ethtool_get_settings(struct net_device *dev,
2345 struct ethtool_cmd *cmd)
2347 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2348 return -EOPNOTSUPP;
2349 return dev->ethtool_ops->get_settings(dev, cmd);
2352 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2354 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2355 return 0;
2356 return dev->ethtool_ops->get_rx_csum(dev);
2359 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2361 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2362 return 0;
2363 return dev->ethtool_ops->get_flags(dev);
2366 /* Logging, debugging and troubleshooting/diagnostic helpers. */
2368 /* netdev_printk helpers, similar to dev_printk */
2370 static inline const char *netdev_name(const struct net_device *dev)
2372 if (dev->reg_state != NETREG_REGISTERED)
2373 return "(unregistered net_device)";
2374 return dev->name;
2377 extern int netdev_printk(const char *level, const struct net_device *dev,
2378 const char *format, ...)
2379 __attribute__ ((format (printf, 3, 4)));
2380 extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2381 __attribute__ ((format (printf, 2, 3)));
2382 extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2383 __attribute__ ((format (printf, 2, 3)));
2384 extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2385 __attribute__ ((format (printf, 2, 3)));
2386 extern int netdev_err(const struct net_device *dev, const char *format, ...)
2387 __attribute__ ((format (printf, 2, 3)));
2388 extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2389 __attribute__ ((format (printf, 2, 3)));
2390 extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2391 __attribute__ ((format (printf, 2, 3)));
2392 extern int netdev_info(const struct net_device *dev, const char *format, ...)
2393 __attribute__ ((format (printf, 2, 3)));
2395 #define MODULE_ALIAS_NETDEV(device) \
2396 MODULE_ALIAS("netdev-" device)
2398 #if defined(DEBUG)
2399 #define netdev_dbg(__dev, format, args...) \
2400 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2401 #elif defined(CONFIG_DYNAMIC_DEBUG)
2402 #define netdev_dbg(__dev, format, args...) \
2403 do { \
2404 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2405 netdev_name(__dev), ##args); \
2406 } while (0)
2407 #else
2408 #define netdev_dbg(__dev, format, args...) \
2409 ({ \
2410 if (0) \
2411 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2412 0; \
2414 #endif
2416 #if defined(VERBOSE_DEBUG)
2417 #define netdev_vdbg netdev_dbg
2418 #else
2420 #define netdev_vdbg(dev, format, args...) \
2421 ({ \
2422 if (0) \
2423 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2424 0; \
2426 #endif
2429 * netdev_WARN() acts like dev_printk(), but with the key difference
2430 * of using a WARN/WARN_ON to get the message out, including the
2431 * file/line information and a backtrace.
2433 #define netdev_WARN(dev, format, args...) \
2434 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2436 /* netif printk helpers, similar to netdev_printk */
2438 #define netif_printk(priv, type, level, dev, fmt, args...) \
2439 do { \
2440 if (netif_msg_##type(priv)) \
2441 netdev_printk(level, (dev), fmt, ##args); \
2442 } while (0)
2444 #define netif_level(level, priv, type, dev, fmt, args...) \
2445 do { \
2446 if (netif_msg_##type(priv)) \
2447 netdev_##level(dev, fmt, ##args); \
2448 } while (0)
2450 #define netif_emerg(priv, type, dev, fmt, args...) \
2451 netif_level(emerg, priv, type, dev, fmt, ##args)
2452 #define netif_alert(priv, type, dev, fmt, args...) \
2453 netif_level(alert, priv, type, dev, fmt, ##args)
2454 #define netif_crit(priv, type, dev, fmt, args...) \
2455 netif_level(crit, priv, type, dev, fmt, ##args)
2456 #define netif_err(priv, type, dev, fmt, args...) \
2457 netif_level(err, priv, type, dev, fmt, ##args)
2458 #define netif_warn(priv, type, dev, fmt, args...) \
2459 netif_level(warn, priv, type, dev, fmt, ##args)
2460 #define netif_notice(priv, type, dev, fmt, args...) \
2461 netif_level(notice, priv, type, dev, fmt, ##args)
2462 #define netif_info(priv, type, dev, fmt, args...) \
2463 netif_level(info, priv, type, dev, fmt, ##args)
2465 #if defined(DEBUG)
2466 #define netif_dbg(priv, type, dev, format, args...) \
2467 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2468 #elif defined(CONFIG_DYNAMIC_DEBUG)
2469 #define netif_dbg(priv, type, netdev, format, args...) \
2470 do { \
2471 if (netif_msg_##type(priv)) \
2472 dynamic_dev_dbg((netdev)->dev.parent, \
2473 "%s: " format, \
2474 netdev_name(netdev), ##args); \
2475 } while (0)
2476 #else
2477 #define netif_dbg(priv, type, dev, format, args...) \
2478 ({ \
2479 if (0) \
2480 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2481 0; \
2483 #endif
2485 #if defined(VERBOSE_DEBUG)
2486 #define netif_vdbg netif_dbg
2487 #else
2488 #define netif_vdbg(priv, type, dev, format, args...) \
2489 ({ \
2490 if (0) \
2491 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2492 0; \
2494 #endif
2496 #endif /* __KERNEL__ */
2498 #endif /* _LINUX_NETDEVICE_H */