Line data Source code
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.
5 : *
6 : * Definitions for the Interfaces handler.
7 : *
8 : * Version: @(#)dev.h 1.0.10 08/12/93
9 : *
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>
17 : *
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.
22 : *
23 : * Moved to /usr/include/linux for NET3
24 : */
25 : #ifndef _LINUX_NETDEVICE_H
26 : #define _LINUX_NETDEVICE_H
27 :
28 : #include <linux/if.h>
29 : #include <linux/if_ether.h>
30 : #include <linux/if_packet.h>
31 :
32 : #ifdef __KERNEL__
33 : #include <linux/timer.h>
34 : #include <linux/delay.h>
35 : #include <linux/mm.h>
36 : #include <asm/atomic.h>
37 : #include <asm/cache.h>
38 : #include <asm/byteorder.h>
39 :
40 : #include <linux/device.h>
41 : #include <linux/percpu.h>
42 : #include <linux/rculist.h>
43 : #include <linux/dmaengine.h>
44 : #include <linux/workqueue.h>
45 :
46 : #include <linux/ethtool.h>
47 : #include <net/net_namespace.h>
48 : #include <net/dsa.h>
49 : #ifdef CONFIG_DCB
50 : #include <net/dcbnl.h>
51 : #endif
52 :
53 : struct vlan_group;
54 : struct netpoll_info;
55 : /* 802.11 specific */
56 : struct wireless_dev;
57 : /* source back-compat hooks */
58 : #define SET_ETHTOOL_OPS(netdev,ops) \
59 : ( (netdev)->ethtool_ops = (ops) )
60 :
61 : #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
62 : functions are available. */
63 : #define HAVE_FREE_NETDEV /* free_netdev() */
64 : #define HAVE_NETDEV_PRIV /* netdev_priv() */
65 :
66 : /* Backlog congestion levels */
67 : #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
68 : #define NET_RX_DROP 1 /* packet dropped */
69 :
70 : /*
71 : * Transmit return codes: transmit return codes originate from three different
72 : * namespaces:
73 : *
74 : * - qdisc return codes
75 : * - driver transmit return codes
76 : * - errno values
77 : *
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.
85 : */
86 :
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 */
93 :
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)
99 :
100 : /* Driver transmit return codes */
101 : #define NETDEV_TX_MASK 0xf0
102 :
103 : enum netdev_tx {
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 */
108 : };
109 1 : typedef enum netdev_tx netdev_tx_t;
110 :
111 : /*
112 : * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
113 : * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
114 : */
115 : static inline bool dev_xmit_complete(int rc)
116 : {
117 : /*
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)
122 : */
123 : if (likely(rc < NET_XMIT_MASK))
124 : return true;
125 :
126 : return false;
127 : }
128 1 :
129 : #endif
130 :
131 : #define MAX_ADDR_LEN 32 /* Largest hardware address length */
132 :
133 : #ifdef __KERNEL__
134 : /*
135 : * Compute the worst case header length according to the protocols
136 : * used.
137 : */
138 :
139 : #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
140 : # if defined(CONFIG_MAC80211_MESH)
141 : # define LL_MAX_HEADER 128
142 : # else
143 : # define LL_MAX_HEADER 96
144 : # endif
145 : #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
146 : # define LL_MAX_HEADER 48
147 : #else
148 : # define LL_MAX_HEADER 32
149 : #endif
150 :
151 : #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
152 : !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
153 : !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
154 : !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
155 : #define MAX_HEADER LL_MAX_HEADER
156 : #else
157 : #define MAX_HEADER (LL_MAX_HEADER + 48)
158 : #endif
159 :
160 : #endif /* __KERNEL__ */
161 :
162 : /*
163 : * Network device statistics. Akin to the 2.0 ether stats but
164 : * with byte counters.
165 : */
166 :
167 : struct net_device_stats {
168 : unsigned long rx_packets; /* total packets received */
169 : unsigned long tx_packets; /* total packets transmitted */
170 : unsigned long rx_bytes; /* total bytes received */
171 : unsigned long tx_bytes; /* total bytes transmitted */
172 : unsigned long rx_errors; /* bad packets received */
173 : unsigned long tx_errors; /* packet transmit problems */
174 : unsigned long rx_dropped; /* no space in linux buffers */
175 : unsigned long tx_dropped; /* no space available in linux */
176 : unsigned long multicast; /* multicast packets received */
177 : unsigned long collisions;
178 :
179 : /* detailed rx_errors: */
180 : unsigned long rx_length_errors;
181 : unsigned long rx_over_errors; /* receiver ring buff overflow */
182 : unsigned long rx_crc_errors; /* recved pkt with crc error */
183 : unsigned long rx_frame_errors; /* recv'd frame alignment error */
184 : unsigned long rx_fifo_errors; /* recv'r fifo overrun */
185 : unsigned long rx_missed_errors; /* receiver missed packet */
186 :
187 : /* detailed tx_errors */
188 : unsigned long tx_aborted_errors;
189 : unsigned long tx_carrier_errors;
190 : unsigned long tx_fifo_errors;
191 : unsigned long tx_heartbeat_errors;
192 : unsigned long tx_window_errors;
193 :
194 : /* for cslip etc */
195 : unsigned long rx_compressed;
196 : unsigned long tx_compressed;
197 : };
198 :
199 :
200 : /* Media selection options. */
201 : enum {
202 : IF_PORT_UNKNOWN = 0,
203 : IF_PORT_10BASE2,
204 : IF_PORT_10BASET,
205 : IF_PORT_AUI,
206 : IF_PORT_100BASET,
207 : IF_PORT_100BASETX,
208 1 : IF_PORT_100BASEFX
209 1 : };
210 :
211 : #ifdef __KERNEL__
212 :
213 : #include <linux/cache.h>
214 : #include <linux/skbuff.h>
215 :
216 : struct neighbour;
217 : struct neigh_parms;
218 : struct sk_buff;
219 :
220 : struct netif_rx_stats {
221 : unsigned total;
222 : unsigned dropped;
223 : unsigned time_squeeze;
224 : unsigned cpu_collision;
225 : };
226 :
227 : DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
228 1 :
229 : struct dev_addr_list {
230 : struct dev_addr_list *next;
231 : u8 da_addr[MAX_ADDR_LEN];
232 : u8 da_addrlen;
233 : u8 da_synced;
234 : int da_users;
235 : int da_gusers;
236 : };
237 :
238 : /*
239 : * We tag multicasts with these structures.
240 : */
241 :
242 : #define dev_mc_list dev_addr_list
243 : #define dmi_addr da_addr
244 : #define dmi_addrlen da_addrlen
245 : #define dmi_users da_users
246 : #define dmi_gusers da_gusers
247 :
248 : struct netdev_hw_addr {
249 : struct list_head list;
250 : unsigned char addr[MAX_ADDR_LEN];
251 : unsigned char type;
252 : #define NETDEV_HW_ADDR_T_LAN 1
253 : #define NETDEV_HW_ADDR_T_SAN 2
254 : #define NETDEV_HW_ADDR_T_SLAVE 3
255 : #define NETDEV_HW_ADDR_T_UNICAST 4
256 : int refcount;
257 : bool synced;
258 : struct rcu_head rcu_head;
259 : };
260 1 :
261 : struct netdev_hw_addr_list {
262 : struct list_head list;
263 : int count;
264 : };
265 1 :
266 : struct hh_cache {
267 : struct hh_cache *hh_next; /* Next entry */
268 : atomic_t hh_refcnt; /* number of users */
269 : /*
270 : * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
271 : * cache line on SMP.
272 : * They are mostly read, but hh_refcnt may be changed quite frequently,
273 : * incurring cache line ping pongs.
274 : */
275 : __be16 hh_type ____cacheline_aligned_in_smp;
276 : /* protocol identifier, f.e ETH_P_IP
277 : * NOTE: For VLANs, this will be the
278 : * encapuslated type. --BLG
279 : */
280 : u16 hh_len; /* length of header */
281 : int (*hh_output)(struct sk_buff *skb);
282 : seqlock_t hh_lock;
283 :
284 : /* cached hardware header; allow for machine alignment needs. */
285 : #define HH_DATA_MOD 16
286 : #define HH_DATA_OFF(__len) \
287 : (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
288 : #define HH_DATA_ALIGN(__len) \
289 : (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
290 : unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
291 : };
292 1 :
293 : /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
294 : * Alternative is:
295 : * dev->hard_header_len ? (dev->hard_header_len +
296 : * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
297 : *
298 : * We could use other alignment values, but we must maintain the
299 : * relationship HH alignment <= LL alignment.
300 : *
301 : * LL_ALLOCATED_SPACE also takes into account the tailroom the device
302 : * may need.
303 : */
304 : #define LL_RESERVED_SPACE(dev) \
305 : ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
306 : #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
307 : ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
308 : #define LL_ALLOCATED_SPACE(dev) \
309 : ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
310 :
311 : struct header_ops {
312 : int (*create) (struct sk_buff *skb, struct net_device *dev,
313 : unsigned short type, const void *daddr,
314 : const void *saddr, unsigned len);
315 : int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
316 : int (*rebuild)(struct sk_buff *skb);
317 : #define HAVE_HEADER_CACHE
318 : int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
319 : void (*cache_update)(struct hh_cache *hh,
320 : const struct net_device *dev,
321 : const unsigned char *haddr);
322 : };
323 :
324 : /* These flag bits are private to the generic network queueing
325 : * layer, they may not be explicitly referenced by any other
326 : * code.
327 : */
328 :
329 : enum netdev_state_t {
330 : __LINK_STATE_START,
331 : __LINK_STATE_PRESENT,
332 : __LINK_STATE_NOCARRIER,
333 : __LINK_STATE_LINKWATCH_PENDING,
334 : __LINK_STATE_DORMANT,
335 : };
336 :
337 :
338 : /*
339 : * This structure holds at boot time configured netdevice settings. They
340 : * are then used in the device probing.
341 : */
342 : struct netdev_boot_setup {
343 : char name[IFNAMSIZ];
344 : struct ifmap map;
345 : };
346 : #define NETDEV_BOOT_SETUP_MAX 8
347 :
348 : extern int __init netdev_boot_setup(char *str);
349 :
350 : /*
351 : * Structure for NAPI scheduling similar to tasklet but with weighting
352 : */
353 : struct napi_struct {
354 : /* The poll_list must only be managed by the entity which
355 : * changes the state of the NAPI_STATE_SCHED bit. This means
356 : * whoever atomically sets that bit can add this napi_struct
357 : * to the per-cpu poll_list, and whoever clears that bit
358 : * can remove from the list right before clearing the bit.
359 : */
360 : struct list_head poll_list;
361 :
362 : unsigned long state;
363 : int weight;
364 : int (*poll)(struct napi_struct *, int);
365 : #ifdef CONFIG_NETPOLL
366 : spinlock_t poll_lock;
367 : int poll_owner;
368 : #endif
369 :
370 : unsigned int gro_count;
371 :
372 : struct net_device *dev;
373 : struct list_head dev_list;
374 : struct sk_buff *gro_list;
375 : struct sk_buff *skb;
376 : };
377 :
378 : enum {
379 : NAPI_STATE_SCHED, /* Poll is scheduled */
380 : NAPI_STATE_DISABLE, /* Disable pending */
381 : NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
382 : };
383 :
384 : enum gro_result {
385 : GRO_MERGED,
386 : GRO_MERGED_FREE,
387 : GRO_HELD,
388 : GRO_NORMAL,
389 : GRO_DROP,
390 : };
391 : typedef enum gro_result gro_result_t;
392 :
393 : extern void __napi_schedule(struct napi_struct *n);
394 :
395 : static inline int napi_disable_pending(struct napi_struct *n)
396 : {
397 : return test_bit(NAPI_STATE_DISABLE, &n->state);
398 : }
399 :
400 : /**
401 : * napi_schedule_prep - check if napi can be scheduled
402 : * @n: napi context
403 : *
404 : * Test if NAPI routine is already running, and if not mark
405 : * it as running. This is used as a condition variable
406 : * insure only one NAPI poll instance runs. We also make
407 : * sure there is no pending NAPI disable.
408 : */
409 : static inline int napi_schedule_prep(struct napi_struct *n)
410 : {
411 : return !napi_disable_pending(n) &&
412 : !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
413 : }
414 :
415 : /**
416 : * napi_schedule - schedule NAPI poll
417 : * @n: napi context
418 : *
419 : * Schedule NAPI poll routine to be called if it is not already
420 : * running.
421 : */
422 : static inline void napi_schedule(struct napi_struct *n)
423 : {
424 : if (napi_schedule_prep(n))
425 : __napi_schedule(n);
426 : }
427 :
428 : /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
429 : static inline int napi_reschedule(struct napi_struct *napi)
430 : {
431 : if (napi_schedule_prep(napi)) {
432 : __napi_schedule(napi);
433 : return 1;
434 : }
435 : return 0;
436 : }
437 :
438 : /**
439 : * napi_complete - NAPI processing complete
440 : * @n: napi context
441 : *
442 : * Mark NAPI processing as complete.
443 : */
444 : extern void __napi_complete(struct napi_struct *n);
445 : extern void napi_complete(struct napi_struct *n);
446 :
447 : /**
448 : * napi_disable - prevent NAPI from scheduling
449 : * @n: napi context
450 : *
451 : * Stop NAPI from being scheduled on this context.
452 : * Waits till any outstanding processing completes.
453 : */
454 : static inline void napi_disable(struct napi_struct *n)
455 : {
456 : set_bit(NAPI_STATE_DISABLE, &n->state);
457 : while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
458 : msleep(1);
459 : clear_bit(NAPI_STATE_DISABLE, &n->state);
460 : }
461 :
462 : /**
463 : * napi_enable - enable NAPI scheduling
464 : * @n: napi context
465 : *
466 : * Resume NAPI from being scheduled on this context.
467 : * Must be paired with napi_disable.
468 : */
469 : static inline void napi_enable(struct napi_struct *n)
470 : {
471 : BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
472 : smp_mb__before_clear_bit();
473 : clear_bit(NAPI_STATE_SCHED, &n->state);
474 : }
475 :
476 : #ifdef CONFIG_SMP
477 : /**
478 : * napi_synchronize - wait until NAPI is not running
479 : * @n: napi context
480 : *
481 : * Wait until NAPI is done being scheduled on this context.
482 : * Waits till any outstanding processing completes but
483 : * does not disable future activations.
484 : */
485 : static inline void napi_synchronize(const struct napi_struct *n)
486 : {
487 : while (test_bit(NAPI_STATE_SCHED, &n->state))
488 : msleep(1);
489 : }
490 : #else
491 : # define napi_synchronize(n) barrier()
492 : #endif
493 :
494 : enum netdev_queue_state_t {
495 : __QUEUE_STATE_XOFF,
496 : __QUEUE_STATE_FROZEN,
497 : };
498 :
499 : struct netdev_queue {
500 2 : /*
501 : * read mostly part
502 : */
503 : struct net_device *dev;
504 : struct Qdisc *qdisc;
505 : unsigned long state;
506 : struct Qdisc *qdisc_sleeping;
507 : /*
508 : * write mostly part
509 : */
510 : spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
511 : int xmit_lock_owner;
512 : /*
513 : * please use this field instead of dev->trans_start
514 : */
515 : unsigned long trans_start;
516 : unsigned long tx_bytes;
517 : unsigned long tx_packets;
518 : unsigned long tx_dropped;
519 : } ____cacheline_aligned_in_smp;
520 1 :
521 :
522 : /*
523 : * This structure defines the management hooks for network devices.
524 : * The following hooks can be defined; unless noted otherwise, they are
525 : * optional and can be filled with a null pointer.
526 : *
527 : * int (*ndo_init)(struct net_device *dev);
528 : * This function is called once when network device is registered.
529 : * The network device can use this to any late stage initializaton
530 : * or semantic validattion. It can fail with an error code which will
531 : * be propogated back to register_netdev
532 : *
533 : * void (*ndo_uninit)(struct net_device *dev);
534 : * This function is called when device is unregistered or when registration
535 : * fails. It is not called if init fails.
536 : *
537 : * int (*ndo_open)(struct net_device *dev);
538 : * This function is called when network device transistions to the up
539 : * state.
540 : *
541 : * int (*ndo_stop)(struct net_device *dev);
542 : * This function is called when network device transistions to the down
543 : * state.
544 : *
545 : * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
546 : * struct net_device *dev);
547 : * Called when a packet needs to be transmitted.
548 : * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
549 : * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
550 : * Required can not be NULL.
551 : *
552 : * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
553 : * Called to decide which queue to when device supports multiple
554 : * transmit queues.
555 : *
556 : * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
557 : * This function is called to allow device receiver to make
558 : * changes to configuration when multicast or promiscious is enabled.
559 : *
560 : * void (*ndo_set_rx_mode)(struct net_device *dev);
561 : * This function is called device changes address list filtering.
562 : *
563 : * void (*ndo_set_multicast_list)(struct net_device *dev);
564 : * This function is called when the multicast address list changes.
565 : *
566 : * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
567 : * This function is called when the Media Access Control address
568 : * needs to be changed. If this interface is not defined, the
569 : * mac address can not be changed.
570 : *
571 : * int (*ndo_validate_addr)(struct net_device *dev);
572 : * Test if Media Access Control address is valid for the device.
573 : *
574 : * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
575 : * Called when a user request an ioctl which can't be handled by
576 : * the generic interface code. If not defined ioctl's return
577 : * not supported error code.
578 : *
579 : * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
580 : * Used to set network devices bus interface parameters. This interface
581 : * is retained for legacy reason, new devices should use the bus
582 : * interface (PCI) for low level management.
583 : *
584 : * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
585 : * Called when a user wants to change the Maximum Transfer Unit
586 : * of a device. If not defined, any request to change MTU will
587 : * will return an error.
588 : *
589 : * void (*ndo_tx_timeout)(struct net_device *dev);
590 : * Callback uses when the transmitter has not made any progress
591 : * for dev->watchdog ticks.
592 : *
593 : * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
594 : * Called when a user wants to get the network device usage
595 : * statistics. If not defined, the counters in dev->stats will
596 : * be used.
597 : *
598 : * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
599 : * If device support VLAN receive accleration
600 : * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
601 : * when vlan groups for the device changes. Note: grp is NULL
602 : * if no vlan's groups are being used.
603 : *
604 : * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
605 : * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
606 : * this function is called when a VLAN id is registered.
607 : *
608 : * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
609 : * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
610 : * this function is called when a VLAN id is unregistered.
611 : *
612 : * void (*ndo_poll_controller)(struct net_device *dev);
613 : */
614 : #define HAVE_NET_DEVICE_OPS
615 : struct net_device_ops {
616 : int (*ndo_init)(struct net_device *dev);
617 : void (*ndo_uninit)(struct net_device *dev);
618 : int (*ndo_open)(struct net_device *dev);
619 : int (*ndo_stop)(struct net_device *dev);
620 : netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
621 : struct net_device *dev);
622 : u16 (*ndo_select_queue)(struct net_device *dev,
623 : struct sk_buff *skb);
624 : #define HAVE_CHANGE_RX_FLAGS
625 : void (*ndo_change_rx_flags)(struct net_device *dev,
626 : int flags);
627 : #define HAVE_SET_RX_MODE
628 : void (*ndo_set_rx_mode)(struct net_device *dev);
629 : #define HAVE_MULTICAST
630 : void (*ndo_set_multicast_list)(struct net_device *dev);
631 : #define HAVE_SET_MAC_ADDR
632 : int (*ndo_set_mac_address)(struct net_device *dev,
633 : void *addr);
634 : #define HAVE_VALIDATE_ADDR
635 : int (*ndo_validate_addr)(struct net_device *dev);
636 : #define HAVE_PRIVATE_IOCTL
637 : int (*ndo_do_ioctl)(struct net_device *dev,
638 : struct ifreq *ifr, int cmd);
639 : #define HAVE_SET_CONFIG
640 : int (*ndo_set_config)(struct net_device *dev,
641 : struct ifmap *map);
642 : #define HAVE_CHANGE_MTU
643 : int (*ndo_change_mtu)(struct net_device *dev,
644 : int new_mtu);
645 : int (*ndo_neigh_setup)(struct net_device *dev,
646 : struct neigh_parms *);
647 : #define HAVE_TX_TIMEOUT
648 : void (*ndo_tx_timeout) (struct net_device *dev);
649 :
650 : struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
651 :
652 : void (*ndo_vlan_rx_register)(struct net_device *dev,
653 : struct vlan_group *grp);
654 : void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
655 : unsigned short vid);
656 : void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
657 : unsigned short vid);
658 1 : #ifdef CONFIG_NET_POLL_CONTROLLER
659 : #define HAVE_NETDEV_POLL
660 : void (*ndo_poll_controller)(struct net_device *dev);
661 : #endif
662 : #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
663 : int (*ndo_fcoe_enable)(struct net_device *dev);
664 : int (*ndo_fcoe_disable)(struct net_device *dev);
665 : int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
666 : u16 xid,
667 5 : struct scatterlist *sgl,
668 : unsigned int sgc);
669 : int (*ndo_fcoe_ddp_done)(struct net_device *dev,
670 : u16 xid);
671 : #define NETDEV_FCOE_WWNN 0
672 : #define NETDEV_FCOE_WWPN 1
673 : int (*ndo_fcoe_get_wwn)(struct net_device *dev,
674 : u64 *wwn, int type);
675 : #endif
676 : };
677 :
678 : /*
679 : * The DEVICE structure.
680 : * Actually, this whole structure is a big mistake. It mixes I/O
681 : * data with strictly "high-level" data, and it has to know about
682 : * almost every data structure used in the INET module.
683 : *
684 : * FIXME: cleanup struct net_device such that network protocol info
685 : * moves out.
686 : */
687 :
688 : struct net_device {
689 :
690 : /*
691 : * This is the first field of the "visible" part of this structure
692 : * (i.e. as seen by users in the "Space.c" file). It is the name
693 : * the interface.
694 : */
695 : char name[IFNAMSIZ];
696 : /* device name hash chain */
697 : struct hlist_node name_hlist;
698 : /* snmp alias */
699 : char *ifalias;
700 :
701 : /*
702 : * I/O specific fields
703 : * FIXME: Merge these and struct ifmap into one
704 : */
705 : unsigned long mem_end; /* shared mem end */
706 : unsigned long mem_start; /* shared mem start */
707 : unsigned long base_addr; /* device I/O address */
708 : unsigned int irq; /* device IRQ number */
709 :
710 : /*
711 : * Some hardware also needs these fields, but they are not
712 : * part of the usual set specified in Space.c.
713 : */
714 :
715 : unsigned char if_port; /* Selectable AUI, TP,..*/
716 : unsigned char dma; /* DMA channel */
717 :
718 : unsigned long state;
719 :
720 : struct list_head dev_list;
721 : struct list_head napi_list;
722 : struct list_head unreg_list;
723 :
724 : /* Net device features */
725 : unsigned long features;
726 : #define NETIF_F_SG 1 /* Scatter/gather IO. */
727 : #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
728 : #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
729 : #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
730 : #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
731 : #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
732 : #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
733 : #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
734 : #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
735 : #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
736 : #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
737 : #define NETIF_F_GSO 2048 /* Enable software GSO. */
738 : #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
739 : /* do not use LLTX in new drivers */
740 : #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
741 : #define NETIF_F_GRO 16384 /* Generic receive offload */
742 : #define NETIF_F_LRO 32768 /* large receive offload */
743 :
744 : /* the GSO_MASK reserves bits 16 through 23 */
745 : #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
746 : #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
747 : #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
748 :
749 : /* Segmentation offload features */
750 : #define NETIF_F_GSO_SHIFT 16
751 : #define NETIF_F_GSO_MASK 0x00ff0000
752 : #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
753 : #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
754 : #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
755 : #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
756 : #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
757 : #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
758 :
759 : /* List of features with software fallbacks. */
760 : #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
761 :
762 :
763 : #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
764 : #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
765 : #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
766 : #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
767 :
768 : /*
769 : * If one device supports one of these features, then enable them
770 : * for all in netdev_increment_features.
771 : */
772 : #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
773 : NETIF_F_SG | NETIF_F_HIGHDMA | \
774 : NETIF_F_FRAGLIST)
775 :
776 : /* Interface index. Unique device identifier */
777 : int ifindex;
778 : int iflink;
779 :
780 : struct net_device_stats stats;
781 :
782 : #ifdef CONFIG_WIRELESS_EXT
783 : /* List of functions to handle Wireless Extensions (instead of ioctl).
784 : * See <net/iw_handler.h> for details. Jean II */
785 : const struct iw_handler_def * wireless_handlers;
786 : /* Instance data managed by the core of Wireless Extensions. */
787 : struct iw_public_data * wireless_data;
788 : #endif
789 : /* Management operations */
790 : const struct net_device_ops *netdev_ops;
791 : const struct ethtool_ops *ethtool_ops;
792 :
793 : /* Hardware header description */
794 : const struct header_ops *header_ops;
795 :
796 : unsigned int flags; /* interface flags (a la BSD) */
797 : unsigned short gflags;
798 : unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
799 : unsigned short padded; /* How much padding added by alloc_netdev() */
800 :
801 : unsigned char operstate; /* RFC2863 operstate */
802 : unsigned char link_mode; /* mapping policy to operstate */
803 :
804 : unsigned mtu; /* interface MTU value */
805 : unsigned short type; /* interface hardware type */
806 : unsigned short hard_header_len; /* hardware hdr length */
807 :
808 : /* extra head- and tailroom the hardware may need, but not in all cases
809 : * can this be guaranteed, especially tailroom. Some cases also use
810 : * LL_MAX_HEADER instead to allocate the skb.
811 : */
812 : unsigned short needed_headroom;
813 : unsigned short needed_tailroom;
814 :
815 : struct net_device *master; /* Pointer to master device of a group,
816 : * which this device is member of.
817 : */
818 :
819 : /* Interface address info. */
820 : unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
821 : unsigned char addr_len; /* hardware address length */
822 : unsigned short dev_id; /* for shared network cards */
823 :
824 : struct netdev_hw_addr_list uc; /* Secondary unicast
825 : mac addresses */
826 : int uc_promisc;
827 : spinlock_t addr_list_lock;
828 : struct dev_addr_list *mc_list; /* Multicast mac addresses */
829 : int mc_count; /* Number of installed mcasts */
830 : unsigned int promiscuity;
831 : unsigned int allmulti;
832 :
833 :
834 : /* Protocol specific pointers */
835 :
836 : #ifdef CONFIG_NET_DSA
837 : void *dsa_ptr; /* dsa specific data */
838 : #endif
839 : void *atalk_ptr; /* AppleTalk link */
840 : void *ip_ptr; /* IPv4 specific data */
841 : void *dn_ptr; /* DECnet specific data */
842 : void *ip6_ptr; /* IPv6 specific data */
843 : void *ec_ptr; /* Econet specific data */
844 : void *ax25_ptr; /* AX.25 specific data */
845 : struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
846 : assign before registering */
847 :
848 : /*
849 : * Cache line mostly used on receive path (including eth_type_trans())
850 : */
851 : unsigned long last_rx; /* Time of last Rx */
852 : /* Interface address info used in eth_type_trans() */
853 : unsigned char *dev_addr; /* hw address, (before bcast
854 : because most packets are
855 : unicast) */
856 :
857 : struct netdev_hw_addr_list dev_addrs; /* list of device
858 : hw addresses */
859 :
860 : unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
861 :
862 : struct netdev_queue rx_queue;
863 :
864 : struct netdev_queue *_tx ____cacheline_aligned_in_smp;
865 :
866 : /* Number of TX queues allocated at alloc_netdev_mq() time */
867 : unsigned int num_tx_queues;
868 :
869 : /* Number of TX queues currently active in device */
870 : unsigned int real_num_tx_queues;
871 :
872 : /* root qdisc from userspace point of view */
873 : struct Qdisc *qdisc;
874 :
875 : unsigned long tx_queue_len; /* Max frames per queue allowed */
876 : spinlock_t tx_global_lock;
877 : /*
878 : * One part is mostly used on xmit path (device)
879 : */
880 : /* These may be needed for future network-power-down code. */
881 :
882 : /*
883 : * trans_start here is expensive for high speed devices on SMP,
884 : * please use netdev_queue->trans_start instead.
885 : */
886 : unsigned long trans_start; /* Time (in jiffies) of last Tx */
887 :
888 : int watchdog_timeo; /* used by dev_watchdog() */
889 : struct timer_list watchdog_timer;
890 :
891 : /* Number of references to this device */
892 : atomic_t refcnt ____cacheline_aligned_in_smp;
893 :
894 : /* delayed register/unregister */
895 : struct list_head todo_list;
896 : /* device index hash chain */
897 : struct hlist_node index_hlist;
898 :
899 : struct list_head link_watch_list;
900 :
901 : /* register/unregister state machine */
902 : enum { NETREG_UNINITIALIZED=0,
903 : NETREG_REGISTERED, /* completed register_netdevice */
904 : NETREG_UNREGISTERING, /* called unregister_netdevice */
905 : NETREG_UNREGISTERED, /* completed unregister todo */
906 : NETREG_RELEASED, /* called free_netdev */
907 : NETREG_DUMMY, /* dummy device for NAPI poll */
908 : } reg_state;
909 :
910 : /* Called from unregister, can be used to call free_netdev */
911 : void (*destructor)(struct net_device *dev);
912 :
913 : #ifdef CONFIG_NETPOLL
914 : struct netpoll_info *npinfo;
915 : #endif
916 :
917 : #ifdef CONFIG_NET_NS
918 : /* Network namespace this network device is inside */
919 : struct net *nd_net;
920 : #endif
921 :
922 : /* mid-layer private */
923 : void *ml_priv;
924 :
925 : /* bridge stuff */
926 : struct net_bridge_port *br_port;
927 : /* macvlan */
928 : struct macvlan_port *macvlan_port;
929 : /* GARP */
930 : struct garp_port *garp_port;
931 :
932 : /* class/net/name entry */
933 : struct device dev;
934 : /* space for optional device, statistics, and wireless sysfs groups */
935 : const struct attribute_group *sysfs_groups[4];
936 :
937 : /* rtnetlink link ops */
938 : const struct rtnl_link_ops *rtnl_link_ops;
939 :
940 : /* VLAN feature mask */
941 : unsigned long vlan_features;
942 :
943 : /* for setting kernel sock attribute on TCP connection setup */
944 : #define GSO_MAX_SIZE 65536
945 : unsigned int gso_max_size;
946 :
947 : #ifdef CONFIG_DCB
948 : /* Data Center Bridging netlink ops */
949 : const struct dcbnl_rtnl_ops *dcbnl_ops;
950 : #endif
951 :
952 : #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
953 : /* max exchange id for FCoE LRO by ddp */
954 : unsigned int fcoe_ddp_xid;
955 : #endif
956 : };
957 : #define to_net_dev(d) container_of(d, struct net_device, dev)
958 :
959 : #define NETDEV_ALIGN 32
960 :
961 : static inline
962 : struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
963 : unsigned int index)
964 : {
965 674 : return &dev->_tx[index];
966 : }
967 :
968 : static inline void netdev_for_each_tx_queue(struct net_device *dev,
969 : void (*f)(struct net_device *,
970 : struct netdev_queue *,
971 : void *),
972 : void *arg)
973 : {
974 : unsigned int i;
975 :
976 : for (i = 0; i < dev->num_tx_queues; i++)
977 : f(dev, &dev->_tx[i], arg);
978 : }
979 :
980 : /*
981 : * Net namespace inlines
982 : */
983 : static inline
984 : struct net *dev_net(const struct net_device *dev)
985 : {
986 : #ifdef CONFIG_NET_NS
987 : return dev->nd_net;
988 : #else
989 : return &init_net;
990 : #endif
991 : }
992 :
993 : static inline
994 : void dev_net_set(struct net_device *dev, struct net *net)
995 : {
996 : #ifdef CONFIG_NET_NS
997 : release_net(dev->nd_net);
998 : dev->nd_net = hold_net(net);
999 : #endif
1000 : }
1001 :
1002 : static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1003 : {
1004 : #ifdef CONFIG_NET_DSA_TAG_DSA
1005 : if (dev->dsa_ptr != NULL)
1006 : return dsa_uses_dsa_tags(dev->dsa_ptr);
1007 : #endif
1008 :
1009 : return 0;
1010 : }
1011 :
1012 : static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1013 : {
1014 : #ifdef CONFIG_NET_DSA_TAG_TRAILER
1015 : if (dev->dsa_ptr != NULL)
1016 : return dsa_uses_trailer_tags(dev->dsa_ptr);
1017 : #endif
1018 :
1019 : return 0;
1020 : }
1021 :
1022 : /**
1023 : * netdev_priv - access network device private data
1024 : * @dev: network device
1025 : *
1026 : * Get network device private data
1027 : */
1028 : static inline void *netdev_priv(const struct net_device *dev)
1029 : {
1030 5302 : return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
1031 : }
1032 :
1033 : /* Set the sysfs physical device reference for the network logical device
1034 : * if set prior to registration will cause a symlink during initialization.
1035 : */
1036 : #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1037 :
1038 : /* Set the sysfs device type for the network logical device to allow
1039 : * fin grained indentification of different network device types. For
1040 : * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1041 : */
1042 : #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1043 :
1044 : /**
1045 : * netif_napi_add - initialize a napi context
1046 : * @dev: network device
1047 : * @napi: napi context
1048 : * @poll: polling function
1049 : * @weight: default weight
1050 : *
1051 : * netif_napi_add() must be used to initialize a napi context prior to calling
1052 : * *any* of the other napi related functions.
1053 : */
1054 : void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1055 : int (*poll)(struct napi_struct *, int), int weight);
1056 :
1057 : /**
1058 : * netif_napi_del - remove a napi context
1059 : * @napi: napi context
1060 : *
1061 : * netif_napi_del() removes a napi context from the network device napi list
1062 : */
1063 : void netif_napi_del(struct napi_struct *napi);
1064 :
1065 : struct napi_gro_cb {
1066 : /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1067 : void *frag0;
1068 :
1069 : /* Length of frag0. */
1070 : unsigned int frag0_len;
1071 :
1072 : /* This indicates where we are processing relative to skb->data. */
1073 : int data_offset;
1074 :
1075 : /* This is non-zero if the packet may be of the same flow. */
1076 : int same_flow;
1077 :
1078 : /* This is non-zero if the packet cannot be merged with the new skb. */
1079 : int flush;
1080 :
1081 : /* Number of segments aggregated. */
1082 : int count;
1083 :
1084 : /* Free the skb? */
1085 : int free;
1086 : };
1087 :
1088 : #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1089 :
1090 : struct packet_type {
1091 : __be16 type; /* This is really htons(ether_type). */
1092 : struct net_device *dev; /* NULL is wildcarded here */
1093 : int (*func) (struct sk_buff *,
1094 : struct net_device *,
1095 : struct packet_type *,
1096 : struct net_device *);
1097 : struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1098 : int features);
1099 : int (*gso_send_check)(struct sk_buff *skb);
1100 : struct sk_buff **(*gro_receive)(struct sk_buff **head,
1101 : struct sk_buff *skb);
1102 : int (*gro_complete)(struct sk_buff *skb);
1103 : void *af_packet_priv;
1104 : struct list_head list;
1105 : };
1106 1 :
1107 : #include <linux/interrupt.h>
1108 : #include <linux/notifier.h>
1109 :
1110 : extern rwlock_t dev_base_lock; /* Device list lock */
1111 :
1112 :
1113 : #define for_each_netdev(net, d) \
1114 : list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1115 : #define for_each_netdev_reverse(net, d) \
1116 : list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1117 : #define for_each_netdev_rcu(net, d) \
1118 : list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1119 : #define for_each_netdev_safe(net, d, n) \
1120 : list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1121 : #define for_each_netdev_continue(net, d) \
1122 : list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
1123 : #define for_each_netdev_continue_rcu(net, d) \
1124 : list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1125 : #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1126 :
1127 : static inline struct net_device *next_net_device(struct net_device *dev)
1128 : {
1129 : struct list_head *lh;
1130 : struct net *net;
1131 :
1132 : net = dev_net(dev);
1133 : lh = dev->dev_list.next;
1134 : return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1135 : }
1136 :
1137 : static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1138 : {
1139 : struct list_head *lh;
1140 : struct net *net;
1141 :
1142 : net = dev_net(dev);
1143 : lh = rcu_dereference(dev->dev_list.next);
1144 : return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1145 : }
1146 :
1147 : static inline struct net_device *first_net_device(struct net *net)
1148 : {
1149 : return list_empty(&net->dev_base_head) ? NULL :
1150 : net_device_entry(net->dev_base_head.next);
1151 : }
1152 :
1153 : extern int netdev_boot_setup_check(struct net_device *dev);
1154 : extern unsigned long netdev_boot_base(const char *prefix, int unit);
1155 : extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1156 : extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1157 : extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1158 : extern void dev_add_pack(struct packet_type *pt);
1159 : extern void dev_remove_pack(struct packet_type *pt);
1160 : extern void __dev_remove_pack(struct packet_type *pt);
1161 :
1162 : extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1163 : unsigned short mask);
1164 : extern struct net_device *dev_get_by_name(struct net *net, const char *name);
1165 : extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
1166 : extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1167 : extern int dev_alloc_name(struct net_device *dev, const char *name);
1168 : extern int dev_open(struct net_device *dev);
1169 : extern int dev_close(struct net_device *dev);
1170 : extern void dev_disable_lro(struct net_device *dev);
1171 : extern int dev_queue_xmit(struct sk_buff *skb);
1172 : extern int register_netdevice(struct net_device *dev);
1173 : extern void unregister_netdevice_queue(struct net_device *dev,
1174 : struct list_head *head);
1175 : extern void unregister_netdevice_many(struct list_head *head);
1176 : static inline void unregister_netdevice(struct net_device *dev)
1177 : {
1178 : unregister_netdevice_queue(dev, NULL);
1179 : }
1180 :
1181 : extern void free_netdev(struct net_device *dev);
1182 : extern void synchronize_net(void);
1183 : extern int register_netdevice_notifier(struct notifier_block *nb);
1184 : extern int unregister_netdevice_notifier(struct notifier_block *nb);
1185 : extern int init_dummy_netdev(struct net_device *dev);
1186 : extern void netdev_resync_ops(struct net_device *dev);
1187 :
1188 : extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1189 : extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1190 : extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1191 : extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
1192 : extern int dev_restart(struct net_device *dev);
1193 : #ifdef CONFIG_NETPOLL_TRAP
1194 : extern int netpoll_trap(void);
1195 : #endif
1196 : extern int skb_gro_receive(struct sk_buff **head,
1197 : struct sk_buff *skb);
1198 : extern void skb_gro_reset_offset(struct sk_buff *skb);
1199 :
1200 : static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1201 : {
1202 : return NAPI_GRO_CB(skb)->data_offset;
1203 : }
1204 :
1205 : static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1206 : {
1207 : return skb->len - NAPI_GRO_CB(skb)->data_offset;
1208 : }
1209 :
1210 : static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1211 : {
1212 : NAPI_GRO_CB(skb)->data_offset += len;
1213 : }
1214 :
1215 : static inline void *skb_gro_header_fast(struct sk_buff *skb,
1216 : unsigned int offset)
1217 : {
1218 : return NAPI_GRO_CB(skb)->frag0 + offset;
1219 : }
1220 :
1221 : static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1222 : {
1223 : return NAPI_GRO_CB(skb)->frag0_len < hlen;
1224 : }
1225 :
1226 : static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1227 : unsigned int offset)
1228 : {
1229 : if (!pskb_may_pull(skb, hlen))
1230 : return NULL;
1231 :
1232 : NAPI_GRO_CB(skb)->frag0 = NULL;
1233 : NAPI_GRO_CB(skb)->frag0_len = 0;
1234 : return skb->data + offset;
1235 : }
1236 :
1237 : static inline void *skb_gro_mac_header(struct sk_buff *skb)
1238 : {
1239 : return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1240 : }
1241 :
1242 : static inline void *skb_gro_network_header(struct sk_buff *skb)
1243 : {
1244 : return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1245 : skb_network_offset(skb);
1246 : }
1247 :
1248 : static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1249 : unsigned short type,
1250 : const void *daddr, const void *saddr,
1251 : unsigned len)
1252 : {
1253 : if (!dev->header_ops || !dev->header_ops->create)
1254 : return 0;
1255 :
1256 : return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1257 : }
1258 :
1259 : static inline int dev_parse_header(const struct sk_buff *skb,
1260 : unsigned char *haddr)
1261 : {
1262 : const struct net_device *dev = skb->dev;
1263 :
1264 : if (!dev->header_ops || !dev->header_ops->parse)
1265 : return 0;
1266 : return dev->header_ops->parse(skb, haddr);
1267 : }
1268 :
1269 : typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1270 : extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1271 : static inline int unregister_gifconf(unsigned int family)
1272 : {
1273 : return register_gifconf(family, NULL);
1274 : }
1275 :
1276 : /*
1277 : * Incoming packets are placed on per-cpu queues so that
1278 : * no locking is needed.
1279 : */
1280 : struct softnet_data {
1281 : struct Qdisc *output_queue;
1282 : struct sk_buff_head input_pkt_queue;
1283 : struct list_head poll_list;
1284 : struct sk_buff *completion_queue;
1285 :
1286 : struct napi_struct backlog;
1287 : };
1288 :
1289 : DECLARE_PER_CPU(struct softnet_data,softnet_data);
1290 :
1291 : #define HAVE_NETIF_QUEUE
1292 :
1293 : extern void __netif_schedule(struct Qdisc *q);
1294 :
1295 : static inline void netif_schedule_queue(struct netdev_queue *txq)
1296 : {
1297 : if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1298 : __netif_schedule(txq->qdisc);
1299 : }
1300 :
1301 : static inline void netif_tx_schedule_all(struct net_device *dev)
1302 : {
1303 : unsigned int i;
1304 :
1305 : for (i = 0; i < dev->num_tx_queues; i++)
1306 : netif_schedule_queue(netdev_get_tx_queue(dev, i));
1307 : }
1308 :
1309 : static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1310 : {
1311 : clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1312 : }
1313 :
1314 : /**
1315 : * netif_start_queue - allow transmit
1316 : * @dev: network device
1317 : *
1318 : * Allow upper layers to call the device hard_start_xmit routine.
1319 : */
1320 : static inline void netif_start_queue(struct net_device *dev)
1321 : {
1322 : netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1323 280 : }
1324 140 :
1325 : static inline void netif_tx_start_all_queues(struct net_device *dev)
1326 : {
1327 : unsigned int i;
1328 :
1329 : for (i = 0; i < dev->num_tx_queues; i++) {
1330 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1331 : netif_tx_start_queue(txq);
1332 : }
1333 : }
1334 700 :
1335 140 : static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1336 : {
1337 : #ifdef CONFIG_NETPOLL_TRAP
1338 : if (netpoll_trap()) {
1339 : netif_tx_start_queue(dev_queue);
1340 : return;
1341 : }
1342 : #endif
1343 : if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1344 : __netif_schedule(dev_queue->qdisc);
1345 : }
1346 :
1347 : /**
1348 : * netif_wake_queue - restart transmit
1349 150 : * @dev: network device
1350 : *
1351 : * Allow upper layers to call the device hard_start_xmit routine.
1352 : * Used for flow control when transmit resources are available.
1353 : */
1354 : static inline void netif_wake_queue(struct net_device *dev)
1355 600 : {
1356 900 : netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1357 300 : }
1358 :
1359 : static inline void netif_tx_wake_all_queues(struct net_device *dev)
1360 : {
1361 : unsigned int i;
1362 :
1363 : for (i = 0; i < dev->num_tx_queues; i++) {
1364 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1365 : netif_tx_wake_queue(txq);
1366 : }
1367 : }
1368 :
1369 : static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1370 : {
1371 768 : set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1372 384 : }
1373 :
1374 : /**
1375 : * netif_stop_queue - stop transmitted packets
1376 : * @dev: network device
1377 : *
1378 : * Stop upper layers calling the device hard_start_xmit routine.
1379 : * Used for flow control when transmit resources are unavailable.
1380 : */
1381 : static inline void netif_stop_queue(struct net_device *dev)
1382 : {
1383 1920 : netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1384 384 : }
1385 :
1386 : static inline void netif_tx_stop_all_queues(struct net_device *dev)
1387 : {
1388 : unsigned int i;
1389 :
1390 : for (i = 0; i < dev->num_tx_queues; i++) {
1391 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1392 : netif_tx_stop_queue(txq);
1393 : }
1394 : }
1395 :
1396 : static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1397 : {
1398 : return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1399 : }
1400 :
1401 : /**
1402 : * netif_queue_stopped - test if transmit queue is flowblocked
1403 : * @dev: network device
1404 : *
1405 : * Test if transmit queue on device is currently unable to send.
1406 : */
1407 : static inline int netif_queue_stopped(const struct net_device *dev)
1408 : {
1409 : return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1410 : }
1411 :
1412 : static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1413 : {
1414 : return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1415 : }
1416 :
1417 : /**
1418 : * netif_running - test if up
1419 : * @dev: network device
1420 : *
1421 : * Test if the device has been brought up.
1422 : */
1423 : static inline int netif_running(const struct net_device *dev)
1424 : {
1425 : return test_bit(__LINK_STATE_START, &dev->state);
1426 : }
1427 :
1428 : /*
1429 : * Routines to manage the subqueues on a device. We only need start
1430 : * stop, and a check if it's stopped. All other device management is
1431 : * done at the overall netdevice level.
1432 : * Also test the device if we're multiqueue.
1433 : */
1434 :
1435 : /**
1436 : * netif_start_subqueue - allow sending packets on subqueue
1437 : * @dev: network device
1438 : * @queue_index: sub queue index
1439 : *
1440 : * Start individual transmit queue of a device with multiple transmit queues.
1441 : */
1442 : static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1443 : {
1444 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1445 :
1446 : netif_tx_start_queue(txq);
1447 : }
1448 :
1449 : /**
1450 : * netif_stop_subqueue - stop sending packets on subqueue
1451 : * @dev: network device
1452 : * @queue_index: sub queue index
1453 : *
1454 : * Stop individual transmit queue of a device with multiple transmit queues.
1455 : */
1456 : static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1457 : {
1458 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1459 : #ifdef CONFIG_NETPOLL_TRAP
1460 : if (netpoll_trap())
1461 : return;
1462 : #endif
1463 : netif_tx_stop_queue(txq);
1464 : }
1465 :
1466 : /**
1467 : * netif_subqueue_stopped - test status of subqueue
1468 : * @dev: network device
1469 : * @queue_index: sub queue index
1470 : *
1471 : * Check individual transmit queue of a device with multiple transmit queues.
1472 : */
1473 : static inline int __netif_subqueue_stopped(const struct net_device *dev,
1474 : u16 queue_index)
1475 : {
1476 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1477 :
1478 : return netif_tx_queue_stopped(txq);
1479 : }
1480 :
1481 : static inline int netif_subqueue_stopped(const struct net_device *dev,
1482 : struct sk_buff *skb)
1483 : {
1484 : return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1485 : }
1486 :
1487 : /**
1488 : * netif_wake_subqueue - allow sending packets on subqueue
1489 : * @dev: network device
1490 : * @queue_index: sub queue index
1491 : *
1492 : * Resume individual transmit queue of a device with multiple transmit queues.
1493 : */
1494 : static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1495 : {
1496 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1497 : #ifdef CONFIG_NETPOLL_TRAP
1498 : if (netpoll_trap())
1499 : return;
1500 : #endif
1501 : if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1502 : __netif_schedule(txq->qdisc);
1503 : }
1504 :
1505 : /**
1506 : * netif_is_multiqueue - test if device has multiple transmit queues
1507 : * @dev: network device
1508 : *
1509 : * Check if device has multiple transmit queues
1510 : */
1511 : static inline int netif_is_multiqueue(const struct net_device *dev)
1512 : {
1513 : return (dev->num_tx_queues > 1);
1514 : }
1515 :
1516 : /* Use this variant when it is known for sure that it
1517 : * is executing from hardware interrupt context or with hardware interrupts
1518 : * disabled.
1519 : */
1520 : extern void dev_kfree_skb_irq(struct sk_buff *skb);
1521 :
1522 : /* Use this variant in places where it could be invoked
1523 : * from either hardware interrupt or other context, with hardware interrupts
1524 : * either disabled or enabled.
1525 : */
1526 : extern void dev_kfree_skb_any(struct sk_buff *skb);
1527 :
1528 : #define HAVE_NETIF_RX 1
1529 : extern int netif_rx(struct sk_buff *skb);
1530 : extern int netif_rx_ni(struct sk_buff *skb);
1531 : #define HAVE_NETIF_RECEIVE_SKB 1
1532 : extern int netif_receive_skb(struct sk_buff *skb);
1533 : extern void napi_gro_flush(struct napi_struct *napi);
1534 : extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1535 : struct sk_buff *skb);
1536 : extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1537 : extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1538 : struct sk_buff *skb);
1539 : extern void napi_reuse_skb(struct napi_struct *napi,
1540 : struct sk_buff *skb);
1541 : extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1542 : extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1543 : struct sk_buff *skb,
1544 : gro_result_t ret);
1545 : extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1546 : extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1547 :
1548 : static inline void napi_free_frags(struct napi_struct *napi)
1549 : {
1550 : kfree_skb(napi->skb);
1551 : napi->skb = NULL;
1552 : }
1553 :
1554 : extern void netif_nit_deliver(struct sk_buff *skb);
1555 : extern int dev_valid_name(const char *name);
1556 : extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1557 : extern int dev_ethtool(struct net *net, struct ifreq *);
1558 : extern unsigned dev_get_flags(const struct net_device *);
1559 : extern int dev_change_flags(struct net_device *, unsigned);
1560 : extern int dev_change_name(struct net_device *, const char *);
1561 : extern int dev_set_alias(struct net_device *, const char *, size_t);
1562 : extern int dev_change_net_namespace(struct net_device *,
1563 : struct net *, const char *);
1564 : extern int dev_set_mtu(struct net_device *, int);
1565 : extern int dev_set_mac_address(struct net_device *,
1566 : struct sockaddr *);
1567 : extern int dev_hard_start_xmit(struct sk_buff *skb,
1568 : struct net_device *dev,
1569 : struct netdev_queue *txq);
1570 : extern int dev_forward_skb(struct net_device *dev,
1571 : struct sk_buff *skb);
1572 :
1573 : extern int netdev_budget;
1574 :
1575 : /* Called by rtnetlink.c:rtnl_unlock() */
1576 : extern void netdev_run_todo(void);
1577 :
1578 : /**
1579 : * dev_put - release reference to device
1580 : * @dev: network device
1581 : *
1582 : * Release reference to device to allow it to be freed.
1583 : */
1584 : static inline void dev_put(struct net_device *dev)
1585 : {
1586 : atomic_dec(&dev->refcnt);
1587 : }
1588 :
1589 : /**
1590 : * dev_hold - get reference to device
1591 : * @dev: network device
1592 : *
1593 : * Hold reference to device to keep it from being freed.
1594 : */
1595 : static inline void dev_hold(struct net_device *dev)
1596 : {
1597 : atomic_inc(&dev->refcnt);
1598 : }
1599 :
1600 : /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1601 : * and _off may be called from IRQ context, but it is caller
1602 : * who is responsible for serialization of these calls.
1603 : *
1604 : * The name carrier is inappropriate, these functions should really be
1605 : * called netif_lowerlayer_*() because they represent the state of any
1606 : * kind of lower layer not just hardware media.
1607 : */
1608 :
1609 : extern void linkwatch_fire_event(struct net_device *dev);
1610 : extern void linkwatch_forget_dev(struct net_device *dev);
1611 :
1612 : /**
1613 : * netif_carrier_ok - test if carrier present
1614 : * @dev: network device
1615 : *
1616 : * Check if carrier is present on device
1617 : */
1618 : static inline int netif_carrier_ok(const struct net_device *dev)
1619 : {
1620 0 : return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1621 : }
1622 :
1623 : extern unsigned long dev_trans_start(struct net_device *dev);
1624 :
1625 : extern void __netdev_watchdog_up(struct net_device *dev);
1626 :
1627 : extern void netif_carrier_on(struct net_device *dev);
1628 :
1629 : extern void netif_carrier_off(struct net_device *dev);
1630 :
1631 : /**
1632 : * netif_dormant_on - mark device as dormant.
1633 : * @dev: network device
1634 : *
1635 : * Mark device as dormant (as per RFC2863).
1636 : *
1637 : * The dormant state indicates that the relevant interface is not
1638 : * actually in a condition to pass packets (i.e., it is not 'up') but is
1639 : * in a "pending" state, waiting for some external event. For "on-
1640 : * demand" interfaces, this new state identifies the situation where the
1641 : * interface is waiting for events to place it in the up state.
1642 : *
1643 : */
1644 : static inline void netif_dormant_on(struct net_device *dev)
1645 : {
1646 : if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1647 : linkwatch_fire_event(dev);
1648 : }
1649 :
1650 : /**
1651 : * netif_dormant_off - set device as not dormant.
1652 : * @dev: network device
1653 : *
1654 : * Device is not in dormant state.
1655 : */
1656 : static inline void netif_dormant_off(struct net_device *dev)
1657 : {
1658 : if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1659 : linkwatch_fire_event(dev);
1660 : }
1661 :
1662 : /**
1663 : * netif_dormant - test if carrier present
1664 : * @dev: network device
1665 : *
1666 : * Check if carrier is present on device
1667 : */
1668 : static inline int netif_dormant(const struct net_device *dev)
1669 : {
1670 : return test_bit(__LINK_STATE_DORMANT, &dev->state);
1671 : }
1672 :
1673 :
1674 : /**
1675 : * netif_oper_up - test if device is operational
1676 : * @dev: network device
1677 : *
1678 : * Check if carrier is operational
1679 : */
1680 : static inline int netif_oper_up(const struct net_device *dev)
1681 : {
1682 : return (dev->operstate == IF_OPER_UP ||
1683 : dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1684 : }
1685 :
1686 : /**
1687 : * netif_device_present - is device available or removed
1688 : * @dev: network device
1689 : *
1690 : * Check if device has not been removed from system.
1691 : */
1692 : static inline int netif_device_present(struct net_device *dev)
1693 : {
1694 56 : return test_bit(__LINK_STATE_PRESENT, &dev->state);
1695 : }
1696 :
1697 : extern void netif_device_detach(struct net_device *dev);
1698 :
1699 : extern void netif_device_attach(struct net_device *dev);
1700 :
1701 : /*
1702 : * Network interface message level settings
1703 : */
1704 : #define HAVE_NETIF_MSG 1
1705 :
1706 : enum {
1707 : NETIF_MSG_DRV = 0x0001,
1708 : NETIF_MSG_PROBE = 0x0002,
1709 : NETIF_MSG_LINK = 0x0004,
1710 : NETIF_MSG_TIMER = 0x0008,
1711 : NETIF_MSG_IFDOWN = 0x0010,
1712 : NETIF_MSG_IFUP = 0x0020,
1713 : NETIF_MSG_RX_ERR = 0x0040,
1714 : NETIF_MSG_TX_ERR = 0x0080,
1715 : NETIF_MSG_TX_QUEUED = 0x0100,
1716 : NETIF_MSG_INTR = 0x0200,
1717 : NETIF_MSG_TX_DONE = 0x0400,
1718 : NETIF_MSG_RX_STATUS = 0x0800,
1719 : NETIF_MSG_PKTDATA = 0x1000,
1720 : NETIF_MSG_HW = 0x2000,
1721 : NETIF_MSG_WOL = 0x4000,
1722 : };
1723 :
1724 : #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1725 : #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1726 : #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1727 : #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1728 : #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1729 : #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1730 : #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1731 : #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1732 : #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1733 : #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1734 : #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1735 : #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1736 : #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1737 : #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1738 : #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1739 :
1740 : static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1741 : {
1742 : /* use default */
1743 : if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1744 : return default_msg_enable_bits;
1745 : if (debug_value == 0) /* no output */
1746 : return 0;
1747 : /* set low N bits */
1748 : return (1 << debug_value) - 1;
1749 : }
1750 :
1751 : static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1752 : {
1753 : spin_lock(&txq->_xmit_lock);
1754 : txq->xmit_lock_owner = cpu;
1755 : }
1756 :
1757 : static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1758 : {
1759 : spin_lock_bh(&txq->_xmit_lock);
1760 : txq->xmit_lock_owner = smp_processor_id();
1761 : }
1762 :
1763 : static inline int __netif_tx_trylock(struct netdev_queue *txq)
1764 : {
1765 : int ok = spin_trylock(&txq->_xmit_lock);
1766 : if (likely(ok))
1767 : txq->xmit_lock_owner = smp_processor_id();
1768 : return ok;
1769 : }
1770 :
1771 : static inline void __netif_tx_unlock(struct netdev_queue *txq)
1772 : {
1773 : txq->xmit_lock_owner = -1;
1774 : spin_unlock(&txq->_xmit_lock);
1775 : }
1776 :
1777 : static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1778 : {
1779 : txq->xmit_lock_owner = -1;
1780 : spin_unlock_bh(&txq->_xmit_lock);
1781 : }
1782 :
1783 : static inline void txq_trans_update(struct netdev_queue *txq)
1784 : {
1785 : if (txq->xmit_lock_owner != -1)
1786 : txq->trans_start = jiffies;
1787 : }
1788 :
1789 : /**
1790 : * netif_tx_lock - grab network device transmit lock
1791 : * @dev: network device
1792 : *
1793 : * Get network device transmit lock
1794 : */
1795 : static inline void netif_tx_lock(struct net_device *dev)
1796 : {
1797 : unsigned int i;
1798 : int cpu;
1799 :
1800 : spin_lock(&dev->tx_global_lock);
1801 : cpu = smp_processor_id();
1802 : for (i = 0; i < dev->num_tx_queues; i++) {
1803 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1804 :
1805 : /* We are the only thread of execution doing a
1806 : * freeze, but we have to grab the _xmit_lock in
1807 : * order to synchronize with threads which are in
1808 : * the ->hard_start_xmit() handler and already
1809 : * checked the frozen bit.
1810 : */
1811 : __netif_tx_lock(txq, cpu);
1812 : set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1813 : __netif_tx_unlock(txq);
1814 : }
1815 : }
1816 :
1817 : static inline void netif_tx_lock_bh(struct net_device *dev)
1818 : {
1819 : local_bh_disable();
1820 : netif_tx_lock(dev);
1821 : }
1822 :
1823 : static inline void netif_tx_unlock(struct net_device *dev)
1824 : {
1825 : unsigned int i;
1826 :
1827 : for (i = 0; i < dev->num_tx_queues; i++) {
1828 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1829 :
1830 : /* No need to grab the _xmit_lock here. If the
1831 : * queue is not stopped for another reason, we
1832 : * force a schedule.
1833 : */
1834 : clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1835 : netif_schedule_queue(txq);
1836 : }
1837 : spin_unlock(&dev->tx_global_lock);
1838 : }
1839 :
1840 : static inline void netif_tx_unlock_bh(struct net_device *dev)
1841 : {
1842 : netif_tx_unlock(dev);
1843 : local_bh_enable();
1844 : }
1845 :
1846 : #define HARD_TX_LOCK(dev, txq, cpu) { \
1847 : if ((dev->features & NETIF_F_LLTX) == 0) { \
1848 : __netif_tx_lock(txq, cpu); \
1849 : } \
1850 : }
1851 :
1852 : #define HARD_TX_UNLOCK(dev, txq) { \
1853 : if ((dev->features & NETIF_F_LLTX) == 0) { \
1854 : __netif_tx_unlock(txq); \
1855 : } \
1856 : }
1857 :
1858 : static inline void netif_tx_disable(struct net_device *dev)
1859 : {
1860 : unsigned int i;
1861 : int cpu;
1862 :
1863 : local_bh_disable();
1864 : cpu = smp_processor_id();
1865 : for (i = 0; i < dev->num_tx_queues; i++) {
1866 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1867 :
1868 : __netif_tx_lock(txq, cpu);
1869 : netif_tx_stop_queue(txq);
1870 : __netif_tx_unlock(txq);
1871 : }
1872 : local_bh_enable();
1873 : }
1874 :
1875 : static inline void netif_addr_lock(struct net_device *dev)
1876 : {
1877 : spin_lock(&dev->addr_list_lock);
1878 : }
1879 :
1880 : static inline void netif_addr_lock_bh(struct net_device *dev)
1881 : {
1882 : spin_lock_bh(&dev->addr_list_lock);
1883 : }
1884 :
1885 : static inline void netif_addr_unlock(struct net_device *dev)
1886 : {
1887 : spin_unlock(&dev->addr_list_lock);
1888 : }
1889 :
1890 : static inline void netif_addr_unlock_bh(struct net_device *dev)
1891 : {
1892 : spin_unlock_bh(&dev->addr_list_lock);
1893 : }
1894 :
1895 : /*
1896 : * dev_addrs walker. Should be used only for read access. Call with
1897 : * rcu_read_lock held.
1898 : */
1899 : #define for_each_dev_addr(dev, ha) \
1900 : list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1901 :
1902 : /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1903 :
1904 : extern void ether_setup(struct net_device *dev);
1905 :
1906 : /* Support for loadable net-drivers */
1907 : extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1908 : void (*setup)(struct net_device *),
1909 : unsigned int queue_count);
1910 : #define alloc_netdev(sizeof_priv, name, setup) \
1911 : alloc_netdev_mq(sizeof_priv, name, setup, 1)
1912 : extern int register_netdev(struct net_device *dev);
1913 : extern void unregister_netdev(struct net_device *dev);
1914 :
1915 : /* Functions used for device addresses handling */
1916 : extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1917 : unsigned char addr_type);
1918 : extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1919 : unsigned char addr_type);
1920 : extern int dev_addr_add_multiple(struct net_device *to_dev,
1921 : struct net_device *from_dev,
1922 : unsigned char addr_type);
1923 : extern int dev_addr_del_multiple(struct net_device *to_dev,
1924 : struct net_device *from_dev,
1925 : unsigned char addr_type);
1926 :
1927 : /* Functions used for secondary unicast and multicast support */
1928 : extern void dev_set_rx_mode(struct net_device *dev);
1929 : extern void __dev_set_rx_mode(struct net_device *dev);
1930 : extern int dev_unicast_delete(struct net_device *dev, void *addr);
1931 : extern int dev_unicast_add(struct net_device *dev, void *addr);
1932 : extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1933 : extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1934 : extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1935 : extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1936 : extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1937 : extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1938 : extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1939 : extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1940 : extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1941 : extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1942 : extern int dev_set_promiscuity(struct net_device *dev, int inc);
1943 : extern int dev_set_allmulti(struct net_device *dev, int inc);
1944 : extern void netdev_state_change(struct net_device *dev);
1945 : extern void netdev_bonding_change(struct net_device *dev,
1946 : unsigned long event);
1947 : extern void netdev_features_change(struct net_device *dev);
1948 : /* Load a device via the kmod */
1949 : extern void dev_load(struct net *net, const char *name);
1950 : extern void dev_mcast_init(void);
1951 : extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1952 : extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
1953 :
1954 : extern int netdev_max_backlog;
1955 : extern int weight_p;
1956 : extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1957 : extern int skb_checksum_help(struct sk_buff *skb);
1958 : extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1959 : #ifdef CONFIG_BUG
1960 : extern void netdev_rx_csum_fault(struct net_device *dev);
1961 : #else
1962 : static inline void netdev_rx_csum_fault(struct net_device *dev)
1963 : {
1964 : }
1965 : #endif
1966 : /* rx skb timestamps */
1967 : extern void net_enable_timestamp(void);
1968 : extern void net_disable_timestamp(void);
1969 :
1970 : #ifdef CONFIG_PROC_FS
1971 : extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1972 : extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1973 : extern void dev_seq_stop(struct seq_file *seq, void *v);
1974 : #endif
1975 :
1976 : extern int netdev_class_create_file(struct class_attribute *class_attr);
1977 : extern void netdev_class_remove_file(struct class_attribute *class_attr);
1978 :
1979 : extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1980 :
1981 : extern void linkwatch_run_queue(void);
1982 :
1983 : unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1984 : unsigned long mask);
1985 : unsigned long netdev_fix_features(unsigned long features, const char *name);
1986 :
1987 : void netif_stacked_transfer_operstate(const struct net_device *rootdev,
1988 : struct net_device *dev);
1989 :
1990 : static inline int net_gso_ok(int features, int gso_type)
1991 : {
1992 : int feature = gso_type << NETIF_F_GSO_SHIFT;
1993 : return (features & feature) == feature;
1994 : }
1995 :
1996 : static inline int skb_gso_ok(struct sk_buff *skb, int features)
1997 : {
1998 : return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1999 : (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
2000 : }
2001 :
2002 : static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2003 : {
2004 : return skb_is_gso(skb) &&
2005 : (!skb_gso_ok(skb, dev->features) ||
2006 : unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2007 : }
2008 :
2009 : static inline void netif_set_gso_max_size(struct net_device *dev,
2010 : unsigned int size)
2011 : {
2012 : dev->gso_max_size = size;
2013 : }
2014 :
2015 : static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
2016 : struct net_device *master)
2017 : {
2018 : if (skb->pkt_type == PACKET_HOST) {
2019 : u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
2020 :
2021 : memcpy(dest, master->dev_addr, ETH_ALEN);
2022 : }
2023 : }
2024 :
2025 : /* On bonding slaves other than the currently active slave, suppress
2026 : * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
2027 : * ARP on active-backup slaves with arp_validate enabled.
2028 : */
2029 : static inline int skb_bond_should_drop(struct sk_buff *skb,
2030 : struct net_device *master)
2031 : {
2032 : if (master) {
2033 : struct net_device *dev = skb->dev;
2034 :
2035 : if (master->priv_flags & IFF_MASTER_ARPMON)
2036 : dev->last_rx = jiffies;
2037 :
2038 : if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
2039 : /* Do address unmangle. The local destination address
2040 : * will be always the one master has. Provides the right
2041 : * functionality in a bridge.
2042 : */
2043 : skb_bond_set_mac_by_master(skb, master);
2044 : }
2045 :
2046 : if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
2047 : if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
2048 : skb->protocol == __cpu_to_be16(ETH_P_ARP))
2049 : return 0;
2050 :
2051 : if (master->priv_flags & IFF_MASTER_ALB) {
2052 : if (skb->pkt_type != PACKET_BROADCAST &&
2053 : skb->pkt_type != PACKET_MULTICAST)
2054 : return 0;
2055 : }
2056 : if (master->priv_flags & IFF_MASTER_8023AD &&
2057 : skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2058 : return 0;
2059 :
2060 : return 1;
2061 : }
2062 : }
2063 : return 0;
2064 : }
2065 :
2066 : extern struct pernet_operations __net_initdata loopback_net_ops;
2067 :
2068 : static inline int dev_ethtool_get_settings(struct net_device *dev,
2069 : struct ethtool_cmd *cmd)
2070 : {
2071 : if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2072 : return -EOPNOTSUPP;
2073 : return dev->ethtool_ops->get_settings(dev, cmd);
2074 : }
2075 :
2076 : static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2077 : {
2078 : if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2079 : return 0;
2080 : return dev->ethtool_ops->get_rx_csum(dev);
2081 : }
2082 :
2083 : static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2084 : {
2085 : if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2086 : return 0;
2087 : return dev->ethtool_ops->get_flags(dev);
2088 : }
2089 :
2090 : #define MODULE_ALIAS_NETDEV(device) \
2091 : MODULE_ALIAS("netdev-" device)
2092 :
2093 : #endif /* __KERNEL__ */
2094 :
2095 : #endif /* _LINUX_NETDEVICE_H */
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