?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
thinkpad-acpi: constrain IBM-era support to IBM boxes
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / netdevice.h
blob992c700231dc9d78f0b2104d6ed2f81206624d2d
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 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
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 IF_PORT_100BASEFX
209 };
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
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
261 struct netdev_hw_addr_list {
262 struct list_head list;
263 int count;
264 };
265
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
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 /*
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
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 #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 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 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 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
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 NAPI_GRO_CB(skb)->frag0 = NULL;
1230 NAPI_GRO_CB(skb)->frag0_len = 0;
1231 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1232 }
1233
1234 static inline void *skb_gro_mac_header(struct sk_buff *skb)
1235 {
1236 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1237 }
1238
1239 static inline void *skb_gro_network_header(struct sk_buff *skb)
1240 {
1241 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1242 skb_network_offset(skb);
1243 }
1244
1245 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1246 unsigned short type,
1247 const void *daddr, const void *saddr,
1248 unsigned len)
1249 {
1250 if (!dev->header_ops || !dev->header_ops->create)
1251 return 0;
1252
1253 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1254 }
1255
1256 static inline int dev_parse_header(const struct sk_buff *skb,
1257 unsigned char *haddr)
1258 {
1259 const struct net_device *dev = skb->dev;
1260
1261 if (!dev->header_ops || !dev->header_ops->parse)
1262 return 0;
1263 return dev->header_ops->parse(skb, haddr);
1264 }
1265
1266 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1267 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1268 static inline int unregister_gifconf(unsigned int family)
1269 {
1270 return register_gifconf(family, NULL);
1271 }
1272
1273 /*
1274 * Incoming packets are placed on per-cpu queues so that
1275 * no locking is needed.
1276 */
1277 struct softnet_data {
1278 struct Qdisc *output_queue;
1279 struct sk_buff_head input_pkt_queue;
1280 struct list_head poll_list;
1281 struct sk_buff *completion_queue;
1282
1283 struct napi_struct backlog;
1284 };
1285
1286 DECLARE_PER_CPU(struct softnet_data,softnet_data);
1287
1288 #define HAVE_NETIF_QUEUE
1289
1290 extern void __netif_schedule(struct Qdisc *q);
1291
1292 static inline void netif_schedule_queue(struct netdev_queue *txq)
1293 {
1294 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1295 __netif_schedule(txq->qdisc);
1296 }
1297
1298 static inline void netif_tx_schedule_all(struct net_device *dev)
1299 {
1300 unsigned int i;
1301
1302 for (i = 0; i < dev->num_tx_queues; i++)
1303 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1304 }
1305
1306 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1307 {
1308 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1309 }
1310
1311 /**
1312 * netif_start_queue - allow transmit
1313 * @dev: network device
1314 *
1315 * Allow upper layers to call the device hard_start_xmit routine.
1316 */
1317 static inline void netif_start_queue(struct net_device *dev)
1318 {
1319 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
1320 }
1321
1322 static inline void netif_tx_start_all_queues(struct net_device *dev)
1323 {
1324 unsigned int i;
1325
1326 for (i = 0; i < dev->num_tx_queues; i++) {
1327 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1328 netif_tx_start_queue(txq);
1329 }
1330 }
1331
1332 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
1333 {
1334 #ifdef CONFIG_NETPOLL_TRAP
1335 if (netpoll_trap()) {
1336 netif_tx_start_queue(dev_queue);
1337 return;
1338 }
1339 #endif
1340 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1341 __netif_schedule(dev_queue->qdisc);
1342 }
1343
1344 /**
1345 * netif_wake_queue - restart transmit
1346 * @dev: network device
1347 *
1348 * Allow upper layers to call the device hard_start_xmit routine.
1349 * Used for flow control when transmit resources are available.
1350 */
1351 static inline void netif_wake_queue(struct net_device *dev)
1352 {
1353 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
1354 }
1355
1356 static inline void netif_tx_wake_all_queues(struct net_device *dev)
1357 {
1358 unsigned int i;
1359
1360 for (i = 0; i < dev->num_tx_queues; i++) {
1361 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1362 netif_tx_wake_queue(txq);
1363 }
1364 }
1365
1366 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1367 {
1368 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1369 }
1370
1371 /**
1372 * netif_stop_queue - stop transmitted packets
1373 * @dev: network device
1374 *
1375 * Stop upper layers calling the device hard_start_xmit routine.
1376 * Used for flow control when transmit resources are unavailable.
1377 */
1378 static inline void netif_stop_queue(struct net_device *dev)
1379 {
1380 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
1381 }
1382
1383 static inline void netif_tx_stop_all_queues(struct net_device *dev)
1384 {
1385 unsigned int i;
1386
1387 for (i = 0; i < dev->num_tx_queues; i++) {
1388 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1389 netif_tx_stop_queue(txq);
1390 }
1391 }
1392
1393 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1394 {
1395 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1396 }
1397
1398 /**
1399 * netif_queue_stopped - test if transmit queue is flowblocked
1400 * @dev: network device
1401 *
1402 * Test if transmit queue on device is currently unable to send.
1403 */
1404 static inline int netif_queue_stopped(const struct net_device *dev)
1405 {
1406 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
1407 }
1408
1409 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1410 {
1411 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1412 }
1413
1414 /**
1415 * netif_running - test if up
1416 * @dev: network device
1417 *
1418 * Test if the device has been brought up.
1419 */
1420 static inline int netif_running(const struct net_device *dev)
1421 {
1422 return test_bit(__LINK_STATE_START, &dev->state);
1423 }
1424
1425 /*
1426 * Routines to manage the subqueues on a device. We only need start
1427 * stop, and a check if it's stopped. All other device management is
1428 * done at the overall netdevice level.
1429 * Also test the device if we're multiqueue.
1430 */
1431
1432 /**
1433 * netif_start_subqueue - allow sending packets on subqueue
1434 * @dev: network device
1435 * @queue_index: sub queue index
1436 *
1437 * Start individual transmit queue of a device with multiple transmit queues.
1438 */
1439 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1440 {
1441 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1442
1443 netif_tx_start_queue(txq);
1444 }
1445
1446 /**
1447 * netif_stop_subqueue - stop sending packets on subqueue
1448 * @dev: network device
1449 * @queue_index: sub queue index
1450 *
1451 * Stop individual transmit queue of a device with multiple transmit queues.
1452 */
1453 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1454 {
1455 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1456 #ifdef CONFIG_NETPOLL_TRAP
1457 if (netpoll_trap())
1458 return;
1459 #endif
1460 netif_tx_stop_queue(txq);
1461 }
1462
1463 /**
1464 * netif_subqueue_stopped - test status of subqueue
1465 * @dev: network device
1466 * @queue_index: sub queue index
1467 *
1468 * Check individual transmit queue of a device with multiple transmit queues.
1469 */
1470 static inline int __netif_subqueue_stopped(const struct net_device *dev,
1471 u16 queue_index)
1472 {
1473 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1474
1475 return netif_tx_queue_stopped(txq);
1476 }
1477
1478 static inline int netif_subqueue_stopped(const struct net_device *dev,
1479 struct sk_buff *skb)
1480 {
1481 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1482 }
1483
1484 /**
1485 * netif_wake_subqueue - allow sending packets on subqueue
1486 * @dev: network device
1487 * @queue_index: sub queue index
1488 *
1489 * Resume individual transmit queue of a device with multiple transmit queues.
1490 */
1491 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1492 {
1493 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1494 #ifdef CONFIG_NETPOLL_TRAP
1495 if (netpoll_trap())
1496 return;
1497 #endif
1498 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1499 __netif_schedule(txq->qdisc);
1500 }
1501
1502 /**
1503 * netif_is_multiqueue - test if device has multiple transmit queues
1504 * @dev: network device
1505 *
1506 * Check if device has multiple transmit queues
1507 */
1508 static inline int netif_is_multiqueue(const struct net_device *dev)
1509 {
1510 return (dev->num_tx_queues > 1);
1511 }
1512
1513 /* Use this variant when it is known for sure that it
1514 * is executing from hardware interrupt context or with hardware interrupts
1515 * disabled.
1516 */
1517 extern void dev_kfree_skb_irq(struct sk_buff *skb);
1518
1519 /* Use this variant in places where it could be invoked
1520 * from either hardware interrupt or other context, with hardware interrupts
1521 * either disabled or enabled.
1522 */
1523 extern void dev_kfree_skb_any(struct sk_buff *skb);
1524
1525 #define HAVE_NETIF_RX 1
1526 extern int netif_rx(struct sk_buff *skb);
1527 extern int netif_rx_ni(struct sk_buff *skb);
1528 #define HAVE_NETIF_RECEIVE_SKB 1
1529 extern int netif_receive_skb(struct sk_buff *skb);
1530 extern void napi_gro_flush(struct napi_struct *napi);
1531 extern gro_result_t dev_gro_receive(struct napi_struct *napi,
1532 struct sk_buff *skb);
1533 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1534 extern gro_result_t napi_gro_receive(struct napi_struct *napi,
1535 struct sk_buff *skb);
1536 extern void napi_reuse_skb(struct napi_struct *napi,
1537 struct sk_buff *skb);
1538 extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
1539 extern gro_result_t napi_frags_finish(struct napi_struct *napi,
1540 struct sk_buff *skb,
1541 gro_result_t ret);
1542 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
1543 extern gro_result_t napi_gro_frags(struct napi_struct *napi);
1544
1545 static inline void napi_free_frags(struct napi_struct *napi)
1546 {
1547 kfree_skb(napi->skb);
1548 napi->skb = NULL;
1549 }
1550
1551 extern void netif_nit_deliver(struct sk_buff *skb);
1552 extern int dev_valid_name(const char *name);
1553 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1554 extern int dev_ethtool(struct net *net, struct ifreq *);
1555 extern unsigned dev_get_flags(const struct net_device *);
1556 extern int dev_change_flags(struct net_device *, unsigned);
1557 extern int dev_change_name(struct net_device *, const char *);
1558 extern int dev_set_alias(struct net_device *, const char *, size_t);
1559 extern int dev_change_net_namespace(struct net_device *,
1560 struct net *, const char *);
1561 extern int dev_set_mtu(struct net_device *, int);
1562 extern int dev_set_mac_address(struct net_device *,
1563 struct sockaddr *);
1564 extern int dev_hard_start_xmit(struct sk_buff *skb,
1565 struct net_device *dev,
1566 struct netdev_queue *txq);
1567 extern int dev_forward_skb(struct net_device *dev,
1568 struct sk_buff *skb);
1569
1570 extern int netdev_budget;
1571
1572 /* Called by rtnetlink.c:rtnl_unlock() */
1573 extern void netdev_run_todo(void);
1574
1575 /**
1576 * dev_put - release reference to device
1577 * @dev: network device
1578 *
1579 * Release reference to device to allow it to be freed.
1580 */
1581 static inline void dev_put(struct net_device *dev)
1582 {
1583 atomic_dec(&dev->refcnt);
1584 }
1585
1586 /**
1587 * dev_hold - get reference to device
1588 * @dev: network device
1589 *
1590 * Hold reference to device to keep it from being freed.
1591 */
1592 static inline void dev_hold(struct net_device *dev)
1593 {
1594 atomic_inc(&dev->refcnt);
1595 }
1596
1597 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
1598 * and _off may be called from IRQ context, but it is caller
1599 * who is responsible for serialization of these calls.
1600 *
1601 * The name carrier is inappropriate, these functions should really be
1602 * called netif_lowerlayer_*() because they represent the state of any
1603 * kind of lower layer not just hardware media.
1604 */
1605
1606 extern void linkwatch_fire_event(struct net_device *dev);
1607 extern void linkwatch_forget_dev(struct net_device *dev);
1608
1609 /**
1610 * netif_carrier_ok - test if carrier present
1611 * @dev: network device
1612 *
1613 * Check if carrier is present on device
1614 */
1615 static inline int netif_carrier_ok(const struct net_device *dev)
1616 {
1617 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1618 }
1619
1620 extern unsigned long dev_trans_start(struct net_device *dev);
1621
1622 extern void __netdev_watchdog_up(struct net_device *dev);
1623
1624 extern void netif_carrier_on(struct net_device *dev);
1625
1626 extern void netif_carrier_off(struct net_device *dev);
1627
1628 /**
1629 * netif_dormant_on - mark device as dormant.
1630 * @dev: network device
1631 *
1632 * Mark device as dormant (as per RFC2863).
1633 *
1634 * The dormant state indicates that the relevant interface is not
1635 * actually in a condition to pass packets (i.e., it is not 'up') but is
1636 * in a "pending" state, waiting for some external event. For "on-
1637 * demand" interfaces, this new state identifies the situation where the
1638 * interface is waiting for events to place it in the up state.
1639 *
1640 */
1641 static inline void netif_dormant_on(struct net_device *dev)
1642 {
1643 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1644 linkwatch_fire_event(dev);
1645 }
1646
1647 /**
1648 * netif_dormant_off - set device as not dormant.
1649 * @dev: network device
1650 *
1651 * Device is not in dormant state.
1652 */
1653 static inline void netif_dormant_off(struct net_device *dev)
1654 {
1655 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1656 linkwatch_fire_event(dev);
1657 }
1658
1659 /**
1660 * netif_dormant - test if carrier present
1661 * @dev: network device
1662 *
1663 * Check if carrier is present on device
1664 */
1665 static inline int netif_dormant(const struct net_device *dev)
1666 {
1667 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1668 }
1669
1670
1671 /**
1672 * netif_oper_up - test if device is operational
1673 * @dev: network device
1674 *
1675 * Check if carrier is operational
1676 */
1677 static inline int netif_oper_up(const struct net_device *dev)
1678 {
1679 return (dev->operstate == IF_OPER_UP ||
1680 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1681 }
1682
1683 /**
1684 * netif_device_present - is device available or removed
1685 * @dev: network device
1686 *
1687 * Check if device has not been removed from system.
1688 */
1689 static inline int netif_device_present(struct net_device *dev)
1690 {
1691 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1692 }
1693
1694 extern void netif_device_detach(struct net_device *dev);
1695
1696 extern void netif_device_attach(struct net_device *dev);
1697
1698 /*
1699 * Network interface message level settings
1700 */
1701 #define HAVE_NETIF_MSG 1
1702
1703 enum {
1704 NETIF_MSG_DRV = 0x0001,
1705 NETIF_MSG_PROBE = 0x0002,
1706 NETIF_MSG_LINK = 0x0004,
1707 NETIF_MSG_TIMER = 0x0008,
1708 NETIF_MSG_IFDOWN = 0x0010,
1709 NETIF_MSG_IFUP = 0x0020,
1710 NETIF_MSG_RX_ERR = 0x0040,
1711 NETIF_MSG_TX_ERR = 0x0080,
1712 NETIF_MSG_TX_QUEUED = 0x0100,
1713 NETIF_MSG_INTR = 0x0200,
1714 NETIF_MSG_TX_DONE = 0x0400,
1715 NETIF_MSG_RX_STATUS = 0x0800,
1716 NETIF_MSG_PKTDATA = 0x1000,
1717 NETIF_MSG_HW = 0x2000,
1718 NETIF_MSG_WOL = 0x4000,
1719 };
1720
1721 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1722 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1723 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1724 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1725 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1726 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1727 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1728 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1729 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1730 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1731 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1732 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1733 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1734 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1735 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1736
1737 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1738 {
1739 /* use default */
1740 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1741 return default_msg_enable_bits;
1742 if (debug_value == 0) /* no output */
1743 return 0;
1744 /* set low N bits */
1745 return (1 << debug_value) - 1;
1746 }
1747
1748 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
1749 {
1750 spin_lock(&txq->_xmit_lock);
1751 txq->xmit_lock_owner = cpu;
1752 }
1753
1754 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1755 {
1756 spin_lock_bh(&txq->_xmit_lock);
1757 txq->xmit_lock_owner = smp_processor_id();
1758 }
1759
1760 static inline int __netif_tx_trylock(struct netdev_queue *txq)
1761 {
1762 int ok = spin_trylock(&txq->_xmit_lock);
1763 if (likely(ok))
1764 txq->xmit_lock_owner = smp_processor_id();
1765 return ok;
1766 }
1767
1768 static inline void __netif_tx_unlock(struct netdev_queue *txq)
1769 {
1770 txq->xmit_lock_owner = -1;
1771 spin_unlock(&txq->_xmit_lock);
1772 }
1773
1774 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1775 {
1776 txq->xmit_lock_owner = -1;
1777 spin_unlock_bh(&txq->_xmit_lock);
1778 }
1779
1780 static inline void txq_trans_update(struct netdev_queue *txq)
1781 {
1782 if (txq->xmit_lock_owner != -1)
1783 txq->trans_start = jiffies;
1784 }
1785
1786 /**
1787 * netif_tx_lock - grab network device transmit lock
1788 * @dev: network device
1789 *
1790 * Get network device transmit lock
1791 */
1792 static inline void netif_tx_lock(struct net_device *dev)
1793 {
1794 unsigned int i;
1795 int cpu;
1796
1797 spin_lock(&dev->tx_global_lock);
1798 cpu = smp_processor_id();
1799 for (i = 0; i < dev->num_tx_queues; i++) {
1800 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1801
1802 /* We are the only thread of execution doing a
1803 * freeze, but we have to grab the _xmit_lock in
1804 * order to synchronize with threads which are in
1805 * the ->hard_start_xmit() handler and already
1806 * checked the frozen bit.
1807 */
1808 __netif_tx_lock(txq, cpu);
1809 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1810 __netif_tx_unlock(txq);
1811 }
1812 }
1813
1814 static inline void netif_tx_lock_bh(struct net_device *dev)
1815 {
1816 local_bh_disable();
1817 netif_tx_lock(dev);
1818 }
1819
1820 static inline void netif_tx_unlock(struct net_device *dev)
1821 {
1822 unsigned int i;
1823
1824 for (i = 0; i < dev->num_tx_queues; i++) {
1825 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1826
1827 /* No need to grab the _xmit_lock here. If the
1828 * queue is not stopped for another reason, we
1829 * force a schedule.
1830 */
1831 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
1832 netif_schedule_queue(txq);
1833 }
1834 spin_unlock(&dev->tx_global_lock);
1835 }
1836
1837 static inline void netif_tx_unlock_bh(struct net_device *dev)
1838 {
1839 netif_tx_unlock(dev);
1840 local_bh_enable();
1841 }
1842
1843 #define HARD_TX_LOCK(dev, txq, cpu) { \
1844 if ((dev->features & NETIF_F_LLTX) == 0) { \
1845 __netif_tx_lock(txq, cpu); \
1846 } \
1847 }
1848
1849 #define HARD_TX_UNLOCK(dev, txq) { \
1850 if ((dev->features & NETIF_F_LLTX) == 0) { \
1851 __netif_tx_unlock(txq); \
1852 } \
1853 }
1854
1855 static inline void netif_tx_disable(struct net_device *dev)
1856 {
1857 unsigned int i;
1858 int cpu;
1859
1860 local_bh_disable();
1861 cpu = smp_processor_id();
1862 for (i = 0; i < dev->num_tx_queues; i++) {
1863 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1864
1865 __netif_tx_lock(txq, cpu);
1866 netif_tx_stop_queue(txq);
1867 __netif_tx_unlock(txq);
1868 }
1869 local_bh_enable();
1870 }
1871
1872 static inline void netif_addr_lock(struct net_device *dev)
1873 {
1874 spin_lock(&dev->addr_list_lock);
1875 }
1876
1877 static inline void netif_addr_lock_bh(struct net_device *dev)
1878 {
1879 spin_lock_bh(&dev->addr_list_lock);
1880 }
1881
1882 static inline void netif_addr_unlock(struct net_device *dev)
1883 {
1884 spin_unlock(&dev->addr_list_lock);
1885 }
1886
1887 static inline void netif_addr_unlock_bh(struct net_device *dev)
1888 {
1889 spin_unlock_bh(&dev->addr_list_lock);
1890 }
1891
1892 /*
1893 * dev_addrs walker. Should be used only for read access. Call with
1894 * rcu_read_lock held.
1895 */
1896 #define for_each_dev_addr(dev, ha) \
1897 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
1898
1899 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
1900
1901 extern void ether_setup(struct net_device *dev);
1902
1903 /* Support for loadable net-drivers */
1904 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1905 void (*setup)(struct net_device *),
1906 unsigned int queue_count);
1907 #define alloc_netdev(sizeof_priv, name, setup) \
1908 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1909 extern int register_netdev(struct net_device *dev);
1910 extern void unregister_netdev(struct net_device *dev);
1911
1912 /* Functions used for device addresses handling */
1913 extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
1914 unsigned char addr_type);
1915 extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
1916 unsigned char addr_type);
1917 extern int dev_addr_add_multiple(struct net_device *to_dev,
1918 struct net_device *from_dev,
1919 unsigned char addr_type);
1920 extern int dev_addr_del_multiple(struct net_device *to_dev,
1921 struct net_device *from_dev,
1922 unsigned char addr_type);
1923
1924 /* Functions used for secondary unicast and multicast support */
1925 extern void dev_set_rx_mode(struct net_device *dev);
1926 extern void __dev_set_rx_mode(struct net_device *dev);
1927 extern int dev_unicast_delete(struct net_device *dev, void *addr);
1928 extern int dev_unicast_add(struct net_device *dev, void *addr);
1929 extern int dev_unicast_sync(struct net_device *to, struct net_device *from);
1930 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from);
1931 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1932 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1933 extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1934 extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
1935 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1936 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1937 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1938 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
1939 extern int dev_set_promiscuity(struct net_device *dev, int inc);
1940 extern int dev_set_allmulti(struct net_device *dev, int inc);
1941 extern void netdev_state_change(struct net_device *dev);
1942 extern void netdev_bonding_change(struct net_device *dev,
1943 unsigned long event);
1944 extern void netdev_features_change(struct net_device *dev);
1945 /* Load a device via the kmod */
1946 extern void dev_load(struct net *net, const char *name);
1947 extern void dev_mcast_init(void);
1948 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
1949 extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
1950
1951 extern int netdev_max_backlog;
1952 extern int weight_p;
1953 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
1954 extern int skb_checksum_help(struct sk_buff *skb);
1955 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
1956 #ifdef CONFIG_BUG
1957 extern void netdev_rx_csum_fault(struct net_device *dev);
1958 #else
1959 static inline void netdev_rx_csum_fault(struct net_device *dev)
1960 {
1961 }
1962 #endif
1963 /* rx skb timestamps */
1964 extern void net_enable_timestamp(void);
1965 extern void net_disable_timestamp(void);
1966
1967 #ifdef CONFIG_PROC_FS
1968 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1969 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1970 extern void dev_seq_stop(struct seq_file *seq, void *v);
1971 #endif
1972
1973 extern int netdev_class_create_file(struct class_attribute *class_attr);
1974 extern void netdev_class_remove_file(struct class_attribute *class_attr);
1975
1976 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
1977
1978 extern void linkwatch_run_queue(void);
1979
1980 unsigned long netdev_increment_features(unsigned long all, unsigned long one,
1981 unsigned long mask);
1982 unsigned long netdev_fix_features(unsigned long features, const char *name);
1983
1984 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
1985 struct net_device *dev);
1986
1987 static inline int net_gso_ok(int features, int gso_type)
1988 {
1989 int feature = gso_type << NETIF_F_GSO_SHIFT;
1990 return (features & feature) == feature;
1991 }
1992
1993 static inline int skb_gso_ok(struct sk_buff *skb, int features)
1994 {
1995 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
1996 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
1997 }
1998
1999 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2000 {
2001 return skb_is_gso(skb) &&
2002 (!skb_gso_ok(skb, dev->features) ||
2003 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2004 }
2005
2006 static inline void netif_set_gso_max_size(struct net_device *dev,
2007 unsigned int size)
2008 {
2009 dev->gso_max_size = size;
2010 }
2011
2012 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb,
2013 struct net_device *master)
2014 {
2015 if (skb->pkt_type == PACKET_HOST) {
2016 u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
2017
2018 memcpy(dest, master->dev_addr, ETH_ALEN);
2019 }
2020 }
2021
2022 /* On bonding slaves other than the currently active slave, suppress
2023 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
2024 * ARP on active-backup slaves with arp_validate enabled.
2025 */
2026 static inline int skb_bond_should_drop(struct sk_buff *skb,
2027 struct net_device *master)
2028 {
2029 if (master) {
2030 struct net_device *dev = skb->dev;
2031
2032 if (master->priv_flags & IFF_MASTER_ARPMON)
2033 dev->last_rx = jiffies;
2034
2035 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) {
2036 /* Do address unmangle. The local destination address
2037 * will be always the one master has. Provides the right
2038 * functionality in a bridge.
2039 */
2040 skb_bond_set_mac_by_master(skb, master);
2041 }
2042
2043 if (dev->priv_flags & IFF_SLAVE_INACTIVE) {
2044 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
2045 skb->protocol == __cpu_to_be16(ETH_P_ARP))
2046 return 0;
2047
2048 if (master->priv_flags & IFF_MASTER_ALB) {
2049 if (skb->pkt_type != PACKET_BROADCAST &&
2050 skb->pkt_type != PACKET_MULTICAST)
2051 return 0;
2052 }
2053 if (master->priv_flags & IFF_MASTER_8023AD &&
2054 skb->protocol == __cpu_to_be16(ETH_P_SLOW))
2055 return 0;
2056
2057 return 1;
2058 }
2059 }
2060 return 0;
2061 }
2062
2063 extern struct pernet_operations __net_initdata loopback_net_ops;
2064
2065 static inline int dev_ethtool_get_settings(struct net_device *dev,
2066 struct ethtool_cmd *cmd)
2067 {
2068 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2069 return -EOPNOTSUPP;
2070 return dev->ethtool_ops->get_settings(dev, cmd);
2071 }
2072
2073 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2074 {
2075 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2076 return 0;
2077 return dev->ethtool_ops->get_rx_csum(dev);
2078 }
2079
2080 static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2081 {
2082 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2083 return 0;
2084 return dev->ethtool_ops->get_flags(dev);
2085 }
2086
2087 #define MODULE_ALIAS_NETDEV(device) \
2088 MODULE_ALIAS("netdev-" device)
2089
2090 #endif /* __KERNEL__ */
2091
2092 #endif /* _LINUX_NETDEVICE_H */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree