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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 | #include <linux/if_link.h> | |
32 | ||
33 | #ifdef __KERNEL__ | |
34 | #include <linux/pm_qos_params.h> | |
35 | #include <linux/timer.h> | |
36 | #include <linux/delay.h> | |
37 | #include <linux/mm.h> | |
38 | #include <asm/atomic.h> | |
39 | #include <asm/cache.h> | |
40 | #include <asm/byteorder.h> | |
41 | ||
42 | #include <linux/device.h> | |
43 | #include <linux/percpu.h> | |
44 | #include <linux/rculist.h> | |
45 | #include <linux/dmaengine.h> | |
46 | #include <linux/workqueue.h> | |
47 | ||
48 | #include <linux/ethtool.h> | |
49 | #include <net/net_namespace.h> | |
50 | #include <net/dsa.h> | |
51 | #ifdef CONFIG_DCB | |
52 | #include <net/dcbnl.h> | |
53 | #endif | |
54 | ||
55 | struct vlan_group; | |
56 | struct netpoll_info; | |
57 | struct phy_device; | |
58 | /* 802.11 specific */ | |
59 | struct wireless_dev; | |
60 | /* source back-compat hooks */ | |
61 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
62 | ( (netdev)->ethtool_ops = (ops) ) | |
63 | ||
64 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
65 | functions are available. */ | |
66 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
67 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
68 | ||
69 | /* Backlog congestion levels */ | |
70 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
71 | #define NET_RX_DROP 1 /* packet dropped */ | |
72 | ||
73 | /* | |
74 | * Transmit return codes: transmit return codes originate from three different | |
75 | * namespaces: | |
76 | * | |
77 | * - qdisc return codes | |
78 | * - driver transmit return codes | |
79 | * - errno values | |
80 | * | |
81 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
82 | * function. Real network devices commonly used with qdiscs should only return | |
83 | * the driver transmit return codes though - when qdiscs are used, the actual | |
84 | * transmission happens asynchronously, so the value is not propagated to | |
85 | * higher layers. Virtual network devices transmit synchronously, in this case | |
86 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
87 | * others are propagated to higher layers. | |
88 | */ | |
89 | ||
90 | /* qdisc ->enqueue() return codes. */ | |
91 | #define NET_XMIT_SUCCESS 0x00 | |
92 | #define NET_XMIT_DROP 0x01 /* skb dropped */ | |
93 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
94 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
95 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
96 | ||
97 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It | |
98 | * indicates that the device will soon be dropping packets, or already drops | |
99 | * some packets of the same priority; prompting us to send less aggressively. */ | |
100 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) | |
101 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) | |
102 | ||
103 | /* Driver transmit return codes */ | |
104 | #define NETDEV_TX_MASK 0xf0 | |
105 | ||
106 | enum netdev_tx { | |
107 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ | |
108 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ | |
109 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
110 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
111 | }; | |
112 | typedef enum netdev_tx netdev_tx_t; | |
113 | ||
114 | /* | |
115 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
116 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
117 | */ | |
118 | static inline bool dev_xmit_complete(int rc) | |
119 | { | |
120 | /* | |
121 | * Positive cases with an skb consumed by a driver: | |
122 | * - successful transmission (rc == NETDEV_TX_OK) | |
123 | * - error while transmitting (rc < 0) | |
124 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
125 | */ | |
126 | if (likely(rc < NET_XMIT_MASK)) | |
127 | return true; | |
128 | ||
129 | return false; | |
130 | } | |
131 | ||
132 | #endif | |
133 | ||
134 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
135 | ||
136 | #ifdef __KERNEL__ | |
137 | /* | |
138 | * Compute the worst case header length according to the protocols | |
139 | * used. | |
140 | */ | |
141 | ||
142 | #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
143 | # if defined(CONFIG_MAC80211_MESH) | |
144 | # define LL_MAX_HEADER 128 | |
145 | # else | |
146 | # define LL_MAX_HEADER 96 | |
147 | # endif | |
148 | #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) | |
149 | # define LL_MAX_HEADER 48 | |
150 | #else | |
151 | # define LL_MAX_HEADER 32 | |
152 | #endif | |
153 | ||
154 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ | |
155 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
156 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
157 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
158 | #define MAX_HEADER LL_MAX_HEADER | |
159 | #else | |
160 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
161 | #endif | |
162 | ||
163 | /* | |
164 | * Old network device statistics. Fields are native words | |
165 | * (unsigned long) so they can be read and written atomically. | |
166 | */ | |
167 | ||
168 | struct net_device_stats { | |
169 | unsigned long rx_packets; | |
170 | unsigned long tx_packets; | |
171 | unsigned long rx_bytes; | |
172 | unsigned long tx_bytes; | |
173 | unsigned long rx_errors; | |
174 | unsigned long tx_errors; | |
175 | unsigned long rx_dropped; | |
176 | unsigned long tx_dropped; | |
177 | unsigned long multicast; | |
178 | unsigned long collisions; | |
179 | unsigned long rx_length_errors; | |
180 | unsigned long rx_over_errors; | |
181 | unsigned long rx_crc_errors; | |
182 | unsigned long rx_frame_errors; | |
183 | unsigned long rx_fifo_errors; | |
184 | unsigned long rx_missed_errors; | |
185 | unsigned long tx_aborted_errors; | |
186 | unsigned long tx_carrier_errors; | |
187 | unsigned long tx_fifo_errors; | |
188 | unsigned long tx_heartbeat_errors; | |
189 | unsigned long tx_window_errors; | |
190 | unsigned long rx_compressed; | |
191 | unsigned long tx_compressed; | |
192 | }; | |
193 | ||
194 | #endif /* __KERNEL__ */ | |
195 | ||
196 | ||
197 | /* Media selection options. */ | |
198 | enum { | |
199 | IF_PORT_UNKNOWN = 0, | |
200 | IF_PORT_10BASE2, | |
201 | IF_PORT_10BASET, | |
202 | IF_PORT_AUI, | |
203 | IF_PORT_100BASET, | |
204 | IF_PORT_100BASETX, | |
205 | IF_PORT_100BASEFX | |
206 | }; | |
207 | ||
208 | #ifdef __KERNEL__ | |
209 | ||
210 | #include <linux/cache.h> | |
211 | #include <linux/skbuff.h> | |
212 | ||
213 | struct neighbour; | |
214 | struct neigh_parms; | |
215 | struct sk_buff; | |
216 | ||
217 | struct netdev_hw_addr { | |
218 | struct list_head list; | |
219 | unsigned char addr[MAX_ADDR_LEN]; | |
220 | unsigned char type; | |
221 | #define NETDEV_HW_ADDR_T_LAN 1 | |
222 | #define NETDEV_HW_ADDR_T_SAN 2 | |
223 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
224 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
225 | #define NETDEV_HW_ADDR_T_MULTICAST 5 | |
226 | int refcount; | |
227 | bool synced; | |
228 | bool global_use; | |
229 | struct rcu_head rcu_head; | |
230 | }; | |
231 | ||
232 | struct netdev_hw_addr_list { | |
233 | struct list_head list; | |
234 | int count; | |
235 | }; | |
236 | ||
237 | #define netdev_hw_addr_list_count(l) ((l)->count) | |
238 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
239 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
240 | list_for_each_entry(ha, &(l)->list, list) | |
241 | ||
242 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) | |
243 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
244 | #define netdev_for_each_uc_addr(ha, dev) \ | |
245 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
246 | ||
247 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) | |
248 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
249 | #define netdev_for_each_mc_addr(ha, dev) \ | |
250 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) | |
251 | ||
252 | struct hh_cache { | |
253 | struct hh_cache *hh_next; /* Next entry */ | |
254 | atomic_t hh_refcnt; /* number of users */ | |
255 | /* | |
256 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
257 | * cache line on SMP. | |
258 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
259 | * incurring cache line ping pongs. | |
260 | */ | |
261 | __be16 hh_type ____cacheline_aligned_in_smp; | |
262 | /* protocol identifier, f.e ETH_P_IP | |
263 | * NOTE: For VLANs, this will be the | |
264 | * encapuslated type. --BLG | |
265 | */ | |
266 | u16 hh_len; /* length of header */ | |
267 | int (*hh_output)(struct sk_buff *skb); | |
268 | seqlock_t hh_lock; | |
269 | ||
270 | /* cached hardware header; allow for machine alignment needs. */ | |
271 | #define HH_DATA_MOD 16 | |
272 | #define HH_DATA_OFF(__len) \ | |
273 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) | |
274 | #define HH_DATA_ALIGN(__len) \ | |
275 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
276 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
277 | }; | |
278 | ||
279 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
280 | * Alternative is: | |
281 | * dev->hard_header_len ? (dev->hard_header_len + | |
282 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
283 | * | |
284 | * We could use other alignment values, but we must maintain the | |
285 | * relationship HH alignment <= LL alignment. | |
286 | * | |
287 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device | |
288 | * may need. | |
289 | */ | |
290 | #define LL_RESERVED_SPACE(dev) \ | |
291 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
292 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
293 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
294 | #define LL_ALLOCATED_SPACE(dev) \ | |
295 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
296 | ||
297 | struct header_ops { | |
298 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
299 | unsigned short type, const void *daddr, | |
300 | const void *saddr, unsigned len); | |
301 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
302 | int (*rebuild)(struct sk_buff *skb); | |
303 | #define HAVE_HEADER_CACHE | |
304 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); | |
305 | void (*cache_update)(struct hh_cache *hh, | |
306 | const struct net_device *dev, | |
307 | const unsigned char *haddr); | |
308 | }; | |
309 | ||
310 | /* These flag bits are private to the generic network queueing | |
311 | * layer, they may not be explicitly referenced by any other | |
312 | * code. | |
313 | */ | |
314 | ||
315 | enum netdev_state_t { | |
316 | __LINK_STATE_START, | |
317 | __LINK_STATE_PRESENT, | |
318 | __LINK_STATE_NOCARRIER, | |
319 | __LINK_STATE_LINKWATCH_PENDING, | |
320 | __LINK_STATE_DORMANT, | |
321 | }; | |
322 | ||
323 | ||
324 | /* | |
325 | * This structure holds at boot time configured netdevice settings. They | |
326 | * are then used in the device probing. | |
327 | */ | |
328 | struct netdev_boot_setup { | |
329 | char name[IFNAMSIZ]; | |
330 | struct ifmap map; | |
331 | }; | |
332 | #define NETDEV_BOOT_SETUP_MAX 8 | |
333 | ||
334 | extern int __init netdev_boot_setup(char *str); | |
335 | ||
336 | /* | |
337 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
338 | */ | |
339 | struct napi_struct { | |
340 | /* The poll_list must only be managed by the entity which | |
341 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
342 | * whoever atomically sets that bit can add this napi_struct | |
343 | * to the per-cpu poll_list, and whoever clears that bit | |
344 | * can remove from the list right before clearing the bit. | |
345 | */ | |
346 | struct list_head poll_list; | |
347 | ||
348 | unsigned long state; | |
349 | int weight; | |
350 | int (*poll)(struct napi_struct *, int); | |
351 | #ifdef CONFIG_NETPOLL | |
352 | spinlock_t poll_lock; | |
353 | int poll_owner; | |
354 | #endif | |
355 | ||
356 | unsigned int gro_count; | |
357 | ||
358 | struct net_device *dev; | |
359 | struct list_head dev_list; | |
360 | struct sk_buff *gro_list; | |
361 | struct sk_buff *skb; | |
362 | }; | |
363 | ||
364 | enum { | |
365 | NAPI_STATE_SCHED, /* Poll is scheduled */ | |
366 | NAPI_STATE_DISABLE, /* Disable pending */ | |
367 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ | |
368 | }; | |
369 | ||
370 | enum gro_result { | |
371 | GRO_MERGED, | |
372 | GRO_MERGED_FREE, | |
373 | GRO_HELD, | |
374 | GRO_NORMAL, | |
375 | GRO_DROP, | |
376 | }; | |
377 | typedef enum gro_result gro_result_t; | |
378 | ||
379 | typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb); | |
380 | ||
381 | extern void __napi_schedule(struct napi_struct *n); | |
382 | ||
383 | static inline int napi_disable_pending(struct napi_struct *n) | |
384 | { | |
385 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
386 | } | |
387 | ||
388 | /** | |
389 | * napi_schedule_prep - check if napi can be scheduled | |
390 | * @n: napi context | |
391 | * | |
392 | * Test if NAPI routine is already running, and if not mark | |
393 | * it as running. This is used as a condition variable | |
394 | * insure only one NAPI poll instance runs. We also make | |
395 | * sure there is no pending NAPI disable. | |
396 | */ | |
397 | static inline int napi_schedule_prep(struct napi_struct *n) | |
398 | { | |
399 | return !napi_disable_pending(n) && | |
400 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
401 | } | |
402 | ||
403 | /** | |
404 | * napi_schedule - schedule NAPI poll | |
405 | * @n: napi context | |
406 | * | |
407 | * Schedule NAPI poll routine to be called if it is not already | |
408 | * running. | |
409 | */ | |
410 | static inline void napi_schedule(struct napi_struct *n) | |
411 | { | |
412 | if (napi_schedule_prep(n)) | |
413 | __napi_schedule(n); | |
414 | } | |
415 | ||
416 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ | |
417 | static inline int napi_reschedule(struct napi_struct *napi) | |
418 | { | |
419 | if (napi_schedule_prep(napi)) { | |
420 | __napi_schedule(napi); | |
421 | return 1; | |
422 | } | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /** | |
427 | * napi_complete - NAPI processing complete | |
428 | * @n: napi context | |
429 | * | |
430 | * Mark NAPI processing as complete. | |
431 | */ | |
432 | extern void __napi_complete(struct napi_struct *n); | |
433 | extern void napi_complete(struct napi_struct *n); | |
434 | ||
435 | /** | |
436 | * napi_disable - prevent NAPI from scheduling | |
437 | * @n: napi context | |
438 | * | |
439 | * Stop NAPI from being scheduled on this context. | |
440 | * Waits till any outstanding processing completes. | |
441 | */ | |
442 | static inline void napi_disable(struct napi_struct *n) | |
443 | { | |
444 | set_bit(NAPI_STATE_DISABLE, &n->state); | |
445 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) | |
446 | msleep(1); | |
447 | clear_bit(NAPI_STATE_DISABLE, &n->state); | |
448 | } | |
449 | ||
450 | /** | |
451 | * napi_enable - enable NAPI scheduling | |
452 | * @n: napi context | |
453 | * | |
454 | * Resume NAPI from being scheduled on this context. | |
455 | * Must be paired with napi_disable. | |
456 | */ | |
457 | static inline void napi_enable(struct napi_struct *n) | |
458 | { | |
459 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
460 | smp_mb__before_clear_bit(); | |
461 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
462 | } | |
463 | ||
464 | #ifdef CONFIG_SMP | |
465 | /** | |
466 | * napi_synchronize - wait until NAPI is not running | |
467 | * @n: napi context | |
468 | * | |
469 | * Wait until NAPI is done being scheduled on this context. | |
470 | * Waits till any outstanding processing completes but | |
471 | * does not disable future activations. | |
472 | */ | |
473 | static inline void napi_synchronize(const struct napi_struct *n) | |
474 | { | |
475 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
476 | msleep(1); | |
477 | } | |
478 | #else | |
479 | # define napi_synchronize(n) barrier() | |
480 | #endif | |
481 | ||
482 | enum netdev_queue_state_t { | |
483 | __QUEUE_STATE_XOFF, | |
484 | __QUEUE_STATE_FROZEN, | |
485 | }; | |
486 | ||
487 | struct netdev_queue { | |
488 | /* | |
489 | * read mostly part | |
490 | */ | |
491 | struct net_device *dev; | |
492 | struct Qdisc *qdisc; | |
493 | unsigned long state; | |
494 | struct Qdisc *qdisc_sleeping; | |
495 | /* | |
496 | * write mostly part | |
497 | */ | |
498 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
499 | int xmit_lock_owner; | |
500 | /* | |
501 | * please use this field instead of dev->trans_start | |
502 | */ | |
503 | unsigned long trans_start; | |
504 | u64 tx_bytes; | |
505 | u64 tx_packets; | |
506 | u64 tx_dropped; | |
507 | } ____cacheline_aligned_in_smp; | |
508 | ||
509 | #ifdef CONFIG_RPS | |
510 | /* | |
511 | * This structure holds an RPS map which can be of variable length. The | |
512 | * map is an array of CPUs. | |
513 | */ | |
514 | struct rps_map { | |
515 | unsigned int len; | |
516 | struct rcu_head rcu; | |
517 | u16 cpus[0]; | |
518 | }; | |
519 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16))) | |
520 | ||
521 | /* | |
522 | * The rps_dev_flow structure contains the mapping of a flow to a CPU and the | |
523 | * tail pointer for that CPU's input queue at the time of last enqueue. | |
524 | */ | |
525 | struct rps_dev_flow { | |
526 | u16 cpu; | |
527 | u16 fill; | |
528 | unsigned int last_qtail; | |
529 | }; | |
530 | ||
531 | /* | |
532 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
533 | */ | |
534 | struct rps_dev_flow_table { | |
535 | unsigned int mask; | |
536 | struct rcu_head rcu; | |
537 | struct work_struct free_work; | |
538 | struct rps_dev_flow flows[0]; | |
539 | }; | |
540 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
541 | (_num * sizeof(struct rps_dev_flow))) | |
542 | ||
543 | /* | |
544 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
545 | * on which they were processed by the application (set in recvmsg). | |
546 | */ | |
547 | struct rps_sock_flow_table { | |
548 | unsigned int mask; | |
549 | u16 ents[0]; | |
550 | }; | |
551 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ | |
552 | (_num * sizeof(u16))) | |
553 | ||
554 | #define RPS_NO_CPU 0xffff | |
555 | ||
556 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, | |
557 | u32 hash) | |
558 | { | |
559 | if (table && hash) { | |
560 | unsigned int cpu, index = hash & table->mask; | |
561 | ||
562 | /* We only give a hint, preemption can change cpu under us */ | |
563 | cpu = raw_smp_processor_id(); | |
564 | ||
565 | if (table->ents[index] != cpu) | |
566 | table->ents[index] = cpu; | |
567 | } | |
568 | } | |
569 | ||
570 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, | |
571 | u32 hash) | |
572 | { | |
573 | if (table && hash) | |
574 | table->ents[hash & table->mask] = RPS_NO_CPU; | |
575 | } | |
576 | ||
577 | extern struct rps_sock_flow_table *rps_sock_flow_table; | |
578 | ||
579 | /* This structure contains an instance of an RX queue. */ | |
580 | struct netdev_rx_queue { | |
581 | struct rps_map *rps_map; | |
582 | struct rps_dev_flow_table *rps_flow_table; | |
583 | struct kobject kobj; | |
584 | struct netdev_rx_queue *first; | |
585 | atomic_t count; | |
586 | } ____cacheline_aligned_in_smp; | |
587 | #endif /* CONFIG_RPS */ | |
588 | ||
589 | /* | |
590 | * This structure defines the management hooks for network devices. | |
591 | * The following hooks can be defined; unless noted otherwise, they are | |
592 | * optional and can be filled with a null pointer. | |
593 | * | |
594 | * int (*ndo_init)(struct net_device *dev); | |
595 | * This function is called once when network device is registered. | |
596 | * The network device can use this to any late stage initializaton | |
597 | * or semantic validattion. It can fail with an error code which will | |
598 | * be propogated back to register_netdev | |
599 | * | |
600 | * void (*ndo_uninit)(struct net_device *dev); | |
601 | * This function is called when device is unregistered or when registration | |
602 | * fails. It is not called if init fails. | |
603 | * | |
604 | * int (*ndo_open)(struct net_device *dev); | |
605 | * This function is called when network device transistions to the up | |
606 | * state. | |
607 | * | |
608 | * int (*ndo_stop)(struct net_device *dev); | |
609 | * This function is called when network device transistions to the down | |
610 | * state. | |
611 | * | |
612 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, | |
613 | * struct net_device *dev); | |
614 | * Called when a packet needs to be transmitted. | |
615 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. | |
616 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
617 | * Required can not be NULL. | |
618 | * | |
619 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
620 | * Called to decide which queue to when device supports multiple | |
621 | * transmit queues. | |
622 | * | |
623 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); | |
624 | * This function is called to allow device receiver to make | |
625 | * changes to configuration when multicast or promiscious is enabled. | |
626 | * | |
627 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
628 | * This function is called device changes address list filtering. | |
629 | * | |
630 | * void (*ndo_set_multicast_list)(struct net_device *dev); | |
631 | * This function is called when the multicast address list changes. | |
632 | * | |
633 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
634 | * This function is called when the Media Access Control address | |
635 | * needs to be changed. If this interface is not defined, the | |
636 | * mac address can not be changed. | |
637 | * | |
638 | * int (*ndo_validate_addr)(struct net_device *dev); | |
639 | * Test if Media Access Control address is valid for the device. | |
640 | * | |
641 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
642 | * Called when a user request an ioctl which can't be handled by | |
643 | * the generic interface code. If not defined ioctl's return | |
644 | * not supported error code. | |
645 | * | |
646 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
647 | * Used to set network devices bus interface parameters. This interface | |
648 | * is retained for legacy reason, new devices should use the bus | |
649 | * interface (PCI) for low level management. | |
650 | * | |
651 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
652 | * Called when a user wants to change the Maximum Transfer Unit | |
653 | * of a device. If not defined, any request to change MTU will | |
654 | * will return an error. | |
655 | * | |
656 | * void (*ndo_tx_timeout)(struct net_device *dev); | |
657 | * Callback uses when the transmitter has not made any progress | |
658 | * for dev->watchdog ticks. | |
659 | * | |
660 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, | |
661 | * struct rtnl_link_stats64 *storage); | |
662 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); | |
663 | * Called when a user wants to get the network device usage | |
664 | * statistics. Drivers must do one of the following: | |
665 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised | |
666 | * rtnl_link_stats64 structure passed by the caller. | |
667 | * 2. Define @ndo_get_stats to update a net_device_stats structure | |
668 | * (which should normally be dev->stats) and return a pointer to | |
669 | * it. The structure may be changed asynchronously only if each | |
670 | * field is written atomically. | |
671 | * 3. Update dev->stats asynchronously and atomically, and define | |
672 | * neither operation. | |
673 | * | |
674 | * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); | |
675 | * If device support VLAN receive accleration | |
676 | * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called | |
677 | * when vlan groups for the device changes. Note: grp is NULL | |
678 | * if no vlan's groups are being used. | |
679 | * | |
680 | * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); | |
681 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
682 | * this function is called when a VLAN id is registered. | |
683 | * | |
684 | * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); | |
685 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
686 | * this function is called when a VLAN id is unregistered. | |
687 | * | |
688 | * void (*ndo_poll_controller)(struct net_device *dev); | |
689 | * | |
690 | * SR-IOV management functions. | |
691 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
692 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
693 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
694 | * int (*ndo_get_vf_config)(struct net_device *dev, | |
695 | * int vf, struct ifla_vf_info *ivf); | |
696 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, | |
697 | * struct nlattr *port[]); | |
698 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
699 | */ | |
700 | #define HAVE_NET_DEVICE_OPS | |
701 | struct net_device_ops { | |
702 | int (*ndo_init)(struct net_device *dev); | |
703 | void (*ndo_uninit)(struct net_device *dev); | |
704 | int (*ndo_open)(struct net_device *dev); | |
705 | int (*ndo_stop)(struct net_device *dev); | |
706 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, | |
707 | struct net_device *dev); | |
708 | u16 (*ndo_select_queue)(struct net_device *dev, | |
709 | struct sk_buff *skb); | |
710 | void (*ndo_change_rx_flags)(struct net_device *dev, | |
711 | int flags); | |
712 | void (*ndo_set_rx_mode)(struct net_device *dev); | |
713 | void (*ndo_set_multicast_list)(struct net_device *dev); | |
714 | int (*ndo_set_mac_address)(struct net_device *dev, | |
715 | void *addr); | |
716 | int (*ndo_validate_addr)(struct net_device *dev); | |
717 | int (*ndo_do_ioctl)(struct net_device *dev, | |
718 | struct ifreq *ifr, int cmd); | |
719 | int (*ndo_set_config)(struct net_device *dev, | |
720 | struct ifmap *map); | |
721 | int (*ndo_change_mtu)(struct net_device *dev, | |
722 | int new_mtu); | |
723 | int (*ndo_neigh_setup)(struct net_device *dev, | |
724 | struct neigh_parms *); | |
725 | void (*ndo_tx_timeout) (struct net_device *dev); | |
726 | ||
727 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, | |
728 | struct rtnl_link_stats64 *storage); | |
729 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); | |
730 | ||
731 | void (*ndo_vlan_rx_register)(struct net_device *dev, | |
732 | struct vlan_group *grp); | |
733 | void (*ndo_vlan_rx_add_vid)(struct net_device *dev, | |
734 | unsigned short vid); | |
735 | void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, | |
736 | unsigned short vid); | |
737 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
738 | void (*ndo_poll_controller)(struct net_device *dev); | |
739 | int (*ndo_netpoll_setup)(struct net_device *dev, | |
740 | struct netpoll_info *info); | |
741 | void (*ndo_netpoll_cleanup)(struct net_device *dev); | |
742 | #endif | |
743 | int (*ndo_set_vf_mac)(struct net_device *dev, | |
744 | int queue, u8 *mac); | |
745 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
746 | int queue, u16 vlan, u8 qos); | |
747 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
748 | int vf, int rate); | |
749 | int (*ndo_get_vf_config)(struct net_device *dev, | |
750 | int vf, | |
751 | struct ifla_vf_info *ivf); | |
752 | int (*ndo_set_vf_port)(struct net_device *dev, | |
753 | int vf, | |
754 | struct nlattr *port[]); | |
755 | int (*ndo_get_vf_port)(struct net_device *dev, | |
756 | int vf, struct sk_buff *skb); | |
757 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) | |
758 | int (*ndo_fcoe_enable)(struct net_device *dev); | |
759 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
760 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, | |
761 | u16 xid, | |
762 | struct scatterlist *sgl, | |
763 | unsigned int sgc); | |
764 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
765 | u16 xid); | |
766 | #define NETDEV_FCOE_WWNN 0 | |
767 | #define NETDEV_FCOE_WWPN 1 | |
768 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
769 | u64 *wwn, int type); | |
770 | #endif | |
771 | }; | |
772 | ||
773 | /* | |
774 | * The DEVICE structure. | |
775 | * Actually, this whole structure is a big mistake. It mixes I/O | |
776 | * data with strictly "high-level" data, and it has to know about | |
777 | * almost every data structure used in the INET module. | |
778 | * | |
779 | * FIXME: cleanup struct net_device such that network protocol info | |
780 | * moves out. | |
781 | */ | |
782 | ||
783 | struct net_device { | |
784 | ||
785 | /* | |
786 | * This is the first field of the "visible" part of this structure | |
787 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
788 | * the interface. | |
789 | */ | |
790 | char name[IFNAMSIZ]; | |
791 | ||
792 | struct pm_qos_request_list *pm_qos_req; | |
793 | ||
794 | /* device name hash chain */ | |
795 | struct hlist_node name_hlist; | |
796 | /* snmp alias */ | |
797 | char *ifalias; | |
798 | ||
799 | /* | |
800 | * I/O specific fields | |
801 | * FIXME: Merge these and struct ifmap into one | |
802 | */ | |
803 | unsigned long mem_end; /* shared mem end */ | |
804 | unsigned long mem_start; /* shared mem start */ | |
805 | unsigned long base_addr; /* device I/O address */ | |
806 | unsigned int irq; /* device IRQ number */ | |
807 | ||
808 | /* | |
809 | * Some hardware also needs these fields, but they are not | |
810 | * part of the usual set specified in Space.c. | |
811 | */ | |
812 | ||
813 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
814 | unsigned char dma; /* DMA channel */ | |
815 | ||
816 | unsigned long state; | |
817 | ||
818 | struct list_head dev_list; | |
819 | struct list_head napi_list; | |
820 | struct list_head unreg_list; | |
821 | ||
822 | /* Net device features */ | |
823 | unsigned long features; | |
824 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
825 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ | |
826 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
827 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
828 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ | |
829 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
830 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
831 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
832 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
833 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
834 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
835 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ | |
836 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ | |
837 | /* do not use LLTX in new drivers */ | |
838 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ | |
839 | #define NETIF_F_GRO 16384 /* Generic receive offload */ | |
840 | #define NETIF_F_LRO 32768 /* large receive offload */ | |
841 | ||
842 | /* the GSO_MASK reserves bits 16 through 23 */ | |
843 | #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ | |
844 | #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ | |
845 | #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ | |
846 | #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ | |
847 | #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ | |
848 | ||
849 | /* Segmentation offload features */ | |
850 | #define NETIF_F_GSO_SHIFT 16 | |
851 | #define NETIF_F_GSO_MASK 0x00ff0000 | |
852 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) | |
853 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) | |
854 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) | |
855 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) | |
856 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
857 | #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) | |
858 | ||
859 | /* List of features with software fallbacks. */ | |
860 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \ | |
861 | NETIF_F_TSO6 | NETIF_F_UFO) | |
862 | ||
863 | ||
864 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) | |
865 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) | |
866 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
867 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
868 | ||
869 | /* | |
870 | * If one device supports one of these features, then enable them | |
871 | * for all in netdev_increment_features. | |
872 | */ | |
873 | #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ | |
874 | NETIF_F_SG | NETIF_F_HIGHDMA | \ | |
875 | NETIF_F_FRAGLIST) | |
876 | ||
877 | /* Interface index. Unique device identifier */ | |
878 | int ifindex; | |
879 | int iflink; | |
880 | ||
881 | struct net_device_stats stats; | |
882 | ||
883 | #ifdef CONFIG_WIRELESS_EXT | |
884 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
885 | * See <net/iw_handler.h> for details. Jean II */ | |
886 | const struct iw_handler_def * wireless_handlers; | |
887 | /* Instance data managed by the core of Wireless Extensions. */ | |
888 | struct iw_public_data * wireless_data; | |
889 | #endif | |
890 | /* Management operations */ | |
891 | const struct net_device_ops *netdev_ops; | |
892 | const struct ethtool_ops *ethtool_ops; | |
893 | ||
894 | /* Hardware header description */ | |
895 | const struct header_ops *header_ops; | |
896 | ||
897 | unsigned int flags; /* interface flags (a la BSD) */ | |
898 | unsigned short gflags; | |
899 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
900 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
901 | ||
902 | unsigned char operstate; /* RFC2863 operstate */ | |
903 | unsigned char link_mode; /* mapping policy to operstate */ | |
904 | ||
905 | unsigned int mtu; /* interface MTU value */ | |
906 | unsigned short type; /* interface hardware type */ | |
907 | unsigned short hard_header_len; /* hardware hdr length */ | |
908 | ||
909 | /* extra head- and tailroom the hardware may need, but not in all cases | |
910 | * can this be guaranteed, especially tailroom. Some cases also use | |
911 | * LL_MAX_HEADER instead to allocate the skb. | |
912 | */ | |
913 | unsigned short needed_headroom; | |
914 | unsigned short needed_tailroom; | |
915 | ||
916 | struct net_device *master; /* Pointer to master device of a group, | |
917 | * which this device is member of. | |
918 | */ | |
919 | ||
920 | /* Interface address info. */ | |
921 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ | |
922 | unsigned char addr_len; /* hardware address length */ | |
923 | unsigned short dev_id; /* for shared network cards */ | |
924 | ||
925 | spinlock_t addr_list_lock; | |
926 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ | |
927 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
928 | int uc_promisc; | |
929 | unsigned int promiscuity; | |
930 | unsigned int allmulti; | |
931 | ||
932 | ||
933 | /* Protocol specific pointers */ | |
934 | ||
935 | #ifdef CONFIG_NET_DSA | |
936 | void *dsa_ptr; /* dsa specific data */ | |
937 | #endif | |
938 | void *atalk_ptr; /* AppleTalk link */ | |
939 | void *ip_ptr; /* IPv4 specific data */ | |
940 | void *dn_ptr; /* DECnet specific data */ | |
941 | void *ip6_ptr; /* IPv6 specific data */ | |
942 | void *ec_ptr; /* Econet specific data */ | |
943 | void *ax25_ptr; /* AX.25 specific data */ | |
944 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, | |
945 | assign before registering */ | |
946 | ||
947 | /* | |
948 | * Cache line mostly used on receive path (including eth_type_trans()) | |
949 | */ | |
950 | unsigned long last_rx; /* Time of last Rx */ | |
951 | /* Interface address info used in eth_type_trans() */ | |
952 | unsigned char *dev_addr; /* hw address, (before bcast | |
953 | because most packets are | |
954 | unicast) */ | |
955 | ||
956 | struct netdev_hw_addr_list dev_addrs; /* list of device | |
957 | hw addresses */ | |
958 | ||
959 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
960 | ||
961 | #ifdef CONFIG_RPS | |
962 | struct kset *queues_kset; | |
963 | ||
964 | struct netdev_rx_queue *_rx; | |
965 | ||
966 | /* Number of RX queues allocated at alloc_netdev_mq() time */ | |
967 | unsigned int num_rx_queues; | |
968 | #endif | |
969 | ||
970 | struct netdev_queue rx_queue; | |
971 | rx_handler_func_t *rx_handler; | |
972 | void *rx_handler_data; | |
973 | ||
974 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; | |
975 | ||
976 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
977 | unsigned int num_tx_queues; | |
978 | ||
979 | /* Number of TX queues currently active in device */ | |
980 | unsigned int real_num_tx_queues; | |
981 | ||
982 | /* root qdisc from userspace point of view */ | |
983 | struct Qdisc *qdisc; | |
984 | ||
985 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
986 | spinlock_t tx_global_lock; | |
987 | /* | |
988 | * One part is mostly used on xmit path (device) | |
989 | */ | |
990 | /* These may be needed for future network-power-down code. */ | |
991 | ||
992 | /* | |
993 | * trans_start here is expensive for high speed devices on SMP, | |
994 | * please use netdev_queue->trans_start instead. | |
995 | */ | |
996 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
997 | ||
998 | int watchdog_timeo; /* used by dev_watchdog() */ | |
999 | struct timer_list watchdog_timer; | |
1000 | ||
1001 | /* Number of references to this device */ | |
1002 | atomic_t refcnt ____cacheline_aligned_in_smp; | |
1003 | ||
1004 | /* delayed register/unregister */ | |
1005 | struct list_head todo_list; | |
1006 | /* device index hash chain */ | |
1007 | struct hlist_node index_hlist; | |
1008 | ||
1009 | struct list_head link_watch_list; | |
1010 | ||
1011 | /* register/unregister state machine */ | |
1012 | enum { NETREG_UNINITIALIZED=0, | |
1013 | NETREG_REGISTERED, /* completed register_netdevice */ | |
1014 | NETREG_UNREGISTERING, /* called unregister_netdevice */ | |
1015 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1016 | NETREG_RELEASED, /* called free_netdev */ | |
1017 | NETREG_DUMMY, /* dummy device for NAPI poll */ | |
1018 | } reg_state:16; | |
1019 | ||
1020 | enum { | |
1021 | RTNL_LINK_INITIALIZED, | |
1022 | RTNL_LINK_INITIALIZING, | |
1023 | } rtnl_link_state:16; | |
1024 | ||
1025 | /* Called from unregister, can be used to call free_netdev */ | |
1026 | void (*destructor)(struct net_device *dev); | |
1027 | ||
1028 | #ifdef CONFIG_NETPOLL | |
1029 | struct netpoll_info *npinfo; | |
1030 | #endif | |
1031 | ||
1032 | #ifdef CONFIG_NET_NS | |
1033 | /* Network namespace this network device is inside */ | |
1034 | struct net *nd_net; | |
1035 | #endif | |
1036 | ||
1037 | /* mid-layer private */ | |
1038 | void *ml_priv; | |
1039 | ||
1040 | /* GARP */ | |
1041 | struct garp_port *garp_port; | |
1042 | ||
1043 | /* class/net/name entry */ | |
1044 | struct device dev; | |
1045 | /* space for optional device, statistics, and wireless sysfs groups */ | |
1046 | const struct attribute_group *sysfs_groups[4]; | |
1047 | ||
1048 | /* rtnetlink link ops */ | |
1049 | const struct rtnl_link_ops *rtnl_link_ops; | |
1050 | ||
1051 | /* VLAN feature mask */ | |
1052 | unsigned long vlan_features; | |
1053 | ||
1054 | /* for setting kernel sock attribute on TCP connection setup */ | |
1055 | #define GSO_MAX_SIZE 65536 | |
1056 | unsigned int gso_max_size; | |
1057 | ||
1058 | #ifdef CONFIG_DCB | |
1059 | /* Data Center Bridging netlink ops */ | |
1060 | const struct dcbnl_rtnl_ops *dcbnl_ops; | |
1061 | #endif | |
1062 | ||
1063 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) | |
1064 | /* max exchange id for FCoE LRO by ddp */ | |
1065 | unsigned int fcoe_ddp_xid; | |
1066 | #endif | |
1067 | /* n-tuple filter list attached to this device */ | |
1068 | struct ethtool_rx_ntuple_list ethtool_ntuple_list; | |
1069 | ||
1070 | /* phy device may attach itself for hardware timestamping */ | |
1071 | struct phy_device *phydev; | |
1072 | }; | |
1073 | #define to_net_dev(d) container_of(d, struct net_device, dev) | |
1074 | ||
1075 | #define NETDEV_ALIGN 32 | |
1076 | ||
1077 | static inline | |
1078 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1079 | unsigned int index) | |
1080 | { | |
1081 | return &dev->_tx[index]; | |
1082 | } | |
1083 | ||
1084 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1085 | void (*f)(struct net_device *, | |
1086 | struct netdev_queue *, | |
1087 | void *), | |
1088 | void *arg) | |
1089 | { | |
1090 | unsigned int i; | |
1091 | ||
1092 | for (i = 0; i < dev->num_tx_queues; i++) | |
1093 | f(dev, &dev->_tx[i], arg); | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Net namespace inlines | |
1098 | */ | |
1099 | static inline | |
1100 | struct net *dev_net(const struct net_device *dev) | |
1101 | { | |
1102 | return read_pnet(&dev->nd_net); | |
1103 | } | |
1104 | ||
1105 | static inline | |
1106 | void dev_net_set(struct net_device *dev, struct net *net) | |
1107 | { | |
1108 | #ifdef CONFIG_NET_NS | |
1109 | release_net(dev->nd_net); | |
1110 | dev->nd_net = hold_net(net); | |
1111 | #endif | |
1112 | } | |
1113 | ||
1114 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) | |
1115 | { | |
1116 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1117 | if (dev->dsa_ptr != NULL) | |
1118 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1119 | #endif | |
1120 | ||
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | #ifndef CONFIG_NET_NS | |
1125 | static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) | |
1126 | { | |
1127 | skb->dev = dev; | |
1128 | } | |
1129 | #else /* CONFIG_NET_NS */ | |
1130 | void skb_set_dev(struct sk_buff *skb, struct net_device *dev); | |
1131 | #endif | |
1132 | ||
1133 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) | |
1134 | { | |
1135 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1136 | if (dev->dsa_ptr != NULL) | |
1137 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1138 | #endif | |
1139 | ||
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | /** | |
1144 | * netdev_priv - access network device private data | |
1145 | * @dev: network device | |
1146 | * | |
1147 | * Get network device private data | |
1148 | */ | |
1149 | static inline void *netdev_priv(const struct net_device *dev) | |
1150 | { | |
1151 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); | |
1152 | } | |
1153 | ||
1154 | /* Set the sysfs physical device reference for the network logical device | |
1155 | * if set prior to registration will cause a symlink during initialization. | |
1156 | */ | |
1157 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) | |
1158 | ||
1159 | /* Set the sysfs device type for the network logical device to allow | |
1160 | * fin grained indentification of different network device types. For | |
1161 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. | |
1162 | */ | |
1163 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1164 | ||
1165 | /** | |
1166 | * netif_napi_add - initialize a napi context | |
1167 | * @dev: network device | |
1168 | * @napi: napi context | |
1169 | * @poll: polling function | |
1170 | * @weight: default weight | |
1171 | * | |
1172 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1173 | * *any* of the other napi related functions. | |
1174 | */ | |
1175 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, | |
1176 | int (*poll)(struct napi_struct *, int), int weight); | |
1177 | ||
1178 | /** | |
1179 | * netif_napi_del - remove a napi context | |
1180 | * @napi: napi context | |
1181 | * | |
1182 | * netif_napi_del() removes a napi context from the network device napi list | |
1183 | */ | |
1184 | void netif_napi_del(struct napi_struct *napi); | |
1185 | ||
1186 | struct napi_gro_cb { | |
1187 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ | |
1188 | void *frag0; | |
1189 | ||
1190 | /* Length of frag0. */ | |
1191 | unsigned int frag0_len; | |
1192 | ||
1193 | /* This indicates where we are processing relative to skb->data. */ | |
1194 | int data_offset; | |
1195 | ||
1196 | /* This is non-zero if the packet may be of the same flow. */ | |
1197 | int same_flow; | |
1198 | ||
1199 | /* This is non-zero if the packet cannot be merged with the new skb. */ | |
1200 | int flush; | |
1201 | ||
1202 | /* Number of segments aggregated. */ | |
1203 | int count; | |
1204 | ||
1205 | /* Free the skb? */ | |
1206 | int free; | |
1207 | }; | |
1208 | ||
1209 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
1210 | ||
1211 | struct packet_type { | |
1212 | __be16 type; /* This is really htons(ether_type). */ | |
1213 | struct net_device *dev; /* NULL is wildcarded here */ | |
1214 | int (*func) (struct sk_buff *, | |
1215 | struct net_device *, | |
1216 | struct packet_type *, | |
1217 | struct net_device *); | |
1218 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, | |
1219 | int features); | |
1220 | int (*gso_send_check)(struct sk_buff *skb); | |
1221 | struct sk_buff **(*gro_receive)(struct sk_buff **head, | |
1222 | struct sk_buff *skb); | |
1223 | int (*gro_complete)(struct sk_buff *skb); | |
1224 | void *af_packet_priv; | |
1225 | struct list_head list; | |
1226 | }; | |
1227 | ||
1228 | #include <linux/interrupt.h> | |
1229 | #include <linux/notifier.h> | |
1230 | ||
1231 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
1232 | ||
1233 | ||
1234 | #define for_each_netdev(net, d) \ | |
1235 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
1236 | #define for_each_netdev_reverse(net, d) \ | |
1237 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
1238 | #define for_each_netdev_rcu(net, d) \ | |
1239 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
1240 | #define for_each_netdev_safe(net, d, n) \ | |
1241 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1242 | #define for_each_netdev_continue(net, d) \ | |
1243 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
1244 | #define for_each_netdev_continue_rcu(net, d) \ | |
1245 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
1246 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) | |
1247 | ||
1248 | static inline struct net_device *next_net_device(struct net_device *dev) | |
1249 | { | |
1250 | struct list_head *lh; | |
1251 | struct net *net; | |
1252 | ||
1253 | net = dev_net(dev); | |
1254 | lh = dev->dev_list.next; | |
1255 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1256 | } | |
1257 | ||
1258 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) | |
1259 | { | |
1260 | struct list_head *lh; | |
1261 | struct net *net; | |
1262 | ||
1263 | net = dev_net(dev); | |
1264 | lh = rcu_dereference(dev->dev_list.next); | |
1265 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1266 | } | |
1267 | ||
1268 | static inline struct net_device *first_net_device(struct net *net) | |
1269 | { | |
1270 | return list_empty(&net->dev_base_head) ? NULL : | |
1271 | net_device_entry(net->dev_base_head.next); | |
1272 | } | |
1273 | ||
1274 | extern int netdev_boot_setup_check(struct net_device *dev); | |
1275 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
1276 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); | |
1277 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1278 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1279 | extern void dev_add_pack(struct packet_type *pt); | |
1280 | extern void dev_remove_pack(struct packet_type *pt); | |
1281 | extern void __dev_remove_pack(struct packet_type *pt); | |
1282 | ||
1283 | extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, | |
1284 | unsigned short mask); | |
1285 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); | |
1286 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
1287 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
1288 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
1289 | extern int dev_open(struct net_device *dev); | |
1290 | extern int dev_close(struct net_device *dev); | |
1291 | extern void dev_disable_lro(struct net_device *dev); | |
1292 | extern int dev_queue_xmit(struct sk_buff *skb); | |
1293 | extern int register_netdevice(struct net_device *dev); | |
1294 | extern void unregister_netdevice_queue(struct net_device *dev, | |
1295 | struct list_head *head); | |
1296 | extern void unregister_netdevice_many(struct list_head *head); | |
1297 | static inline void unregister_netdevice(struct net_device *dev) | |
1298 | { | |
1299 | unregister_netdevice_queue(dev, NULL); | |
1300 | } | |
1301 | ||
1302 | extern void free_netdev(struct net_device *dev); | |
1303 | extern void synchronize_net(void); | |
1304 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1305 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
1306 | extern int init_dummy_netdev(struct net_device *dev); | |
1307 | extern void netdev_resync_ops(struct net_device *dev); | |
1308 | ||
1309 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); | |
1310 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); | |
1311 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
1312 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
1313 | extern int dev_restart(struct net_device *dev); | |
1314 | #ifdef CONFIG_NETPOLL_TRAP | |
1315 | extern int netpoll_trap(void); | |
1316 | #endif | |
1317 | extern int skb_gro_receive(struct sk_buff **head, | |
1318 | struct sk_buff *skb); | |
1319 | extern void skb_gro_reset_offset(struct sk_buff *skb); | |
1320 | ||
1321 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1322 | { | |
1323 | return NAPI_GRO_CB(skb)->data_offset; | |
1324 | } | |
1325 | ||
1326 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1327 | { | |
1328 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1329 | } | |
1330 | ||
1331 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1332 | { | |
1333 | NAPI_GRO_CB(skb)->data_offset += len; | |
1334 | } | |
1335 | ||
1336 | static inline void *skb_gro_header_fast(struct sk_buff *skb, | |
1337 | unsigned int offset) | |
1338 | { | |
1339 | return NAPI_GRO_CB(skb)->frag0 + offset; | |
1340 | } | |
1341 | ||
1342 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) | |
1343 | { | |
1344 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1345 | } | |
1346 | ||
1347 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, | |
1348 | unsigned int offset) | |
1349 | { | |
1350 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
1351 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
1352 | return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; | |
1353 | } | |
1354 | ||
1355 | static inline void *skb_gro_mac_header(struct sk_buff *skb) | |
1356 | { | |
1357 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); | |
1358 | } | |
1359 | ||
1360 | static inline void *skb_gro_network_header(struct sk_buff *skb) | |
1361 | { | |
1362 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + | |
1363 | skb_network_offset(skb); | |
1364 | } | |
1365 | ||
1366 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, | |
1367 | unsigned short type, | |
1368 | const void *daddr, const void *saddr, | |
1369 | unsigned len) | |
1370 | { | |
1371 | if (!dev->header_ops || !dev->header_ops->create) | |
1372 | return 0; | |
1373 | ||
1374 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
1375 | } | |
1376 | ||
1377 | static inline int dev_parse_header(const struct sk_buff *skb, | |
1378 | unsigned char *haddr) | |
1379 | { | |
1380 | const struct net_device *dev = skb->dev; | |
1381 | ||
1382 | if (!dev->header_ops || !dev->header_ops->parse) | |
1383 | return 0; | |
1384 | return dev->header_ops->parse(skb, haddr); | |
1385 | } | |
1386 | ||
1387 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
1388 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1389 | static inline int unregister_gifconf(unsigned int family) | |
1390 | { | |
1391 | return register_gifconf(family, NULL); | |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * Incoming packets are placed on per-cpu queues | |
1396 | */ | |
1397 | struct softnet_data { | |
1398 | struct Qdisc *output_queue; | |
1399 | struct Qdisc **output_queue_tailp; | |
1400 | struct list_head poll_list; | |
1401 | struct sk_buff *completion_queue; | |
1402 | struct sk_buff_head process_queue; | |
1403 | ||
1404 | /* stats */ | |
1405 | unsigned int processed; | |
1406 | unsigned int time_squeeze; | |
1407 | unsigned int cpu_collision; | |
1408 | unsigned int received_rps; | |
1409 | ||
1410 | #ifdef CONFIG_RPS | |
1411 | struct softnet_data *rps_ipi_list; | |
1412 | ||
1413 | /* Elements below can be accessed between CPUs for RPS */ | |
1414 | struct call_single_data csd ____cacheline_aligned_in_smp; | |
1415 | struct softnet_data *rps_ipi_next; | |
1416 | unsigned int cpu; | |
1417 | unsigned int input_queue_head; | |
1418 | unsigned int input_queue_tail; | |
1419 | #endif | |
1420 | unsigned dropped; | |
1421 | struct sk_buff_head input_pkt_queue; | |
1422 | struct napi_struct backlog; | |
1423 | }; | |
1424 | ||
1425 | static inline void input_queue_head_incr(struct softnet_data *sd) | |
1426 | { | |
1427 | #ifdef CONFIG_RPS | |
1428 | sd->input_queue_head++; | |
1429 | #endif | |
1430 | } | |
1431 | ||
1432 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
1433 | unsigned int *qtail) | |
1434 | { | |
1435 | #ifdef CONFIG_RPS | |
1436 | *qtail = ++sd->input_queue_tail; | |
1437 | #endif | |
1438 | } | |
1439 | ||
1440 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); | |
1441 | ||
1442 | #define HAVE_NETIF_QUEUE | |
1443 | ||
1444 | extern void __netif_schedule(struct Qdisc *q); | |
1445 | ||
1446 | static inline void netif_schedule_queue(struct netdev_queue *txq) | |
1447 | { | |
1448 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
1449 | __netif_schedule(txq->qdisc); | |
1450 | } | |
1451 | ||
1452 | static inline void netif_tx_schedule_all(struct net_device *dev) | |
1453 | { | |
1454 | unsigned int i; | |
1455 | ||
1456 | for (i = 0; i < dev->num_tx_queues; i++) | |
1457 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1458 | } | |
1459 | ||
1460 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) | |
1461 | { | |
1462 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1463 | } | |
1464 | ||
1465 | /** | |
1466 | * netif_start_queue - allow transmit | |
1467 | * @dev: network device | |
1468 | * | |
1469 | * Allow upper layers to call the device hard_start_xmit routine. | |
1470 | */ | |
1471 | static inline void netif_start_queue(struct net_device *dev) | |
1472 | { | |
1473 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); | |
1474 | } | |
1475 | ||
1476 | static inline void netif_tx_start_all_queues(struct net_device *dev) | |
1477 | { | |
1478 | unsigned int i; | |
1479 | ||
1480 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1481 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1482 | netif_tx_start_queue(txq); | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) | |
1487 | { | |
1488 | #ifdef CONFIG_NETPOLL_TRAP | |
1489 | if (netpoll_trap()) { | |
1490 | netif_tx_start_queue(dev_queue); | |
1491 | return; | |
1492 | } | |
1493 | #endif | |
1494 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) | |
1495 | __netif_schedule(dev_queue->qdisc); | |
1496 | } | |
1497 | ||
1498 | /** | |
1499 | * netif_wake_queue - restart transmit | |
1500 | * @dev: network device | |
1501 | * | |
1502 | * Allow upper layers to call the device hard_start_xmit routine. | |
1503 | * Used for flow control when transmit resources are available. | |
1504 | */ | |
1505 | static inline void netif_wake_queue(struct net_device *dev) | |
1506 | { | |
1507 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); | |
1508 | } | |
1509 | ||
1510 | static inline void netif_tx_wake_all_queues(struct net_device *dev) | |
1511 | { | |
1512 | unsigned int i; | |
1513 | ||
1514 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1515 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1516 | netif_tx_wake_queue(txq); | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) | |
1521 | { | |
1522 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1523 | } | |
1524 | ||
1525 | /** | |
1526 | * netif_stop_queue - stop transmitted packets | |
1527 | * @dev: network device | |
1528 | * | |
1529 | * Stop upper layers calling the device hard_start_xmit routine. | |
1530 | * Used for flow control when transmit resources are unavailable. | |
1531 | */ | |
1532 | static inline void netif_stop_queue(struct net_device *dev) | |
1533 | { | |
1534 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); | |
1535 | } | |
1536 | ||
1537 | static inline void netif_tx_stop_all_queues(struct net_device *dev) | |
1538 | { | |
1539 | unsigned int i; | |
1540 | ||
1541 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1542 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1543 | netif_tx_stop_queue(txq); | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) | |
1548 | { | |
1549 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1550 | } | |
1551 | ||
1552 | /** | |
1553 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1554 | * @dev: network device | |
1555 | * | |
1556 | * Test if transmit queue on device is currently unable to send. | |
1557 | */ | |
1558 | static inline int netif_queue_stopped(const struct net_device *dev) | |
1559 | { | |
1560 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); | |
1561 | } | |
1562 | ||
1563 | static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) | |
1564 | { | |
1565 | return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); | |
1566 | } | |
1567 | ||
1568 | /** | |
1569 | * netif_running - test if up | |
1570 | * @dev: network device | |
1571 | * | |
1572 | * Test if the device has been brought up. | |
1573 | */ | |
1574 | static inline int netif_running(const struct net_device *dev) | |
1575 | { | |
1576 | return test_bit(__LINK_STATE_START, &dev->state); | |
1577 | } | |
1578 | ||
1579 | /* | |
1580 | * Routines to manage the subqueues on a device. We only need start | |
1581 | * stop, and a check if it's stopped. All other device management is | |
1582 | * done at the overall netdevice level. | |
1583 | * Also test the device if we're multiqueue. | |
1584 | */ | |
1585 | ||
1586 | /** | |
1587 | * netif_start_subqueue - allow sending packets on subqueue | |
1588 | * @dev: network device | |
1589 | * @queue_index: sub queue index | |
1590 | * | |
1591 | * Start individual transmit queue of a device with multiple transmit queues. | |
1592 | */ | |
1593 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) | |
1594 | { | |
1595 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1596 | ||
1597 | netif_tx_start_queue(txq); | |
1598 | } | |
1599 | ||
1600 | /** | |
1601 | * netif_stop_subqueue - stop sending packets on subqueue | |
1602 | * @dev: network device | |
1603 | * @queue_index: sub queue index | |
1604 | * | |
1605 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1606 | */ | |
1607 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) | |
1608 | { | |
1609 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1610 | #ifdef CONFIG_NETPOLL_TRAP | |
1611 | if (netpoll_trap()) | |
1612 | return; | |
1613 | #endif | |
1614 | netif_tx_stop_queue(txq); | |
1615 | } | |
1616 | ||
1617 | /** | |
1618 | * netif_subqueue_stopped - test status of subqueue | |
1619 | * @dev: network device | |
1620 | * @queue_index: sub queue index | |
1621 | * | |
1622 | * Check individual transmit queue of a device with multiple transmit queues. | |
1623 | */ | |
1624 | static inline int __netif_subqueue_stopped(const struct net_device *dev, | |
1625 | u16 queue_index) | |
1626 | { | |
1627 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1628 | ||
1629 | return netif_tx_queue_stopped(txq); | |
1630 | } | |
1631 | ||
1632 | static inline int netif_subqueue_stopped(const struct net_device *dev, | |
1633 | struct sk_buff *skb) | |
1634 | { | |
1635 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1636 | } | |
1637 | ||
1638 | /** | |
1639 | * netif_wake_subqueue - allow sending packets on subqueue | |
1640 | * @dev: network device | |
1641 | * @queue_index: sub queue index | |
1642 | * | |
1643 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1644 | */ | |
1645 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
1646 | { | |
1647 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
1648 | #ifdef CONFIG_NETPOLL_TRAP | |
1649 | if (netpoll_trap()) | |
1650 | return; | |
1651 | #endif | |
1652 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
1653 | __netif_schedule(txq->qdisc); | |
1654 | } | |
1655 | ||
1656 | /** | |
1657 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1658 | * @dev: network device | |
1659 | * | |
1660 | * Check if device has multiple transmit queues | |
1661 | */ | |
1662 | static inline int netif_is_multiqueue(const struct net_device *dev) | |
1663 | { | |
1664 | return (dev->num_tx_queues > 1); | |
1665 | } | |
1666 | ||
1667 | extern void netif_set_real_num_tx_queues(struct net_device *dev, | |
1668 | unsigned int txq); | |
1669 | ||
1670 | /* Use this variant when it is known for sure that it | |
1671 | * is executing from hardware interrupt context or with hardware interrupts | |
1672 | * disabled. | |
1673 | */ | |
1674 | extern void dev_kfree_skb_irq(struct sk_buff *skb); | |
1675 | ||
1676 | /* Use this variant in places where it could be invoked | |
1677 | * from either hardware interrupt or other context, with hardware interrupts | |
1678 | * either disabled or enabled. | |
1679 | */ | |
1680 | extern void dev_kfree_skb_any(struct sk_buff *skb); | |
1681 | ||
1682 | #define HAVE_NETIF_RX 1 | |
1683 | extern int netif_rx(struct sk_buff *skb); | |
1684 | extern int netif_rx_ni(struct sk_buff *skb); | |
1685 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1686 | extern int netif_receive_skb(struct sk_buff *skb); | |
1687 | extern gro_result_t dev_gro_receive(struct napi_struct *napi, | |
1688 | struct sk_buff *skb); | |
1689 | extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); | |
1690 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, | |
1691 | struct sk_buff *skb); | |
1692 | extern void napi_reuse_skb(struct napi_struct *napi, | |
1693 | struct sk_buff *skb); | |
1694 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); | |
1695 | extern gro_result_t napi_frags_finish(struct napi_struct *napi, | |
1696 | struct sk_buff *skb, | |
1697 | gro_result_t ret); | |
1698 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); | |
1699 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); | |
1700 | ||
1701 | static inline void napi_free_frags(struct napi_struct *napi) | |
1702 | { | |
1703 | kfree_skb(napi->skb); | |
1704 | napi->skb = NULL; | |
1705 | } | |
1706 | ||
1707 | extern int netdev_rx_handler_register(struct net_device *dev, | |
1708 | rx_handler_func_t *rx_handler, | |
1709 | void *rx_handler_data); | |
1710 | extern void netdev_rx_handler_unregister(struct net_device *dev); | |
1711 | ||
1712 | extern void netif_nit_deliver(struct sk_buff *skb); | |
1713 | extern int dev_valid_name(const char *name); | |
1714 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
1715 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1716 | extern unsigned dev_get_flags(const struct net_device *); | |
1717 | extern int __dev_change_flags(struct net_device *, unsigned int flags); | |
1718 | extern int dev_change_flags(struct net_device *, unsigned); | |
1719 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); | |
1720 | extern int dev_change_name(struct net_device *, const char *); | |
1721 | extern int dev_set_alias(struct net_device *, const char *, size_t); | |
1722 | extern int dev_change_net_namespace(struct net_device *, | |
1723 | struct net *, const char *); | |
1724 | extern int dev_set_mtu(struct net_device *, int); | |
1725 | extern int dev_set_mac_address(struct net_device *, | |
1726 | struct sockaddr *); | |
1727 | extern int dev_hard_start_xmit(struct sk_buff *skb, | |
1728 | struct net_device *dev, | |
1729 | struct netdev_queue *txq); | |
1730 | extern int dev_forward_skb(struct net_device *dev, | |
1731 | struct sk_buff *skb); | |
1732 | ||
1733 | extern int netdev_budget; | |
1734 | ||
1735 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1736 | extern void netdev_run_todo(void); | |
1737 | ||
1738 | /** | |
1739 | * dev_put - release reference to device | |
1740 | * @dev: network device | |
1741 | * | |
1742 | * Release reference to device to allow it to be freed. | |
1743 | */ | |
1744 | static inline void dev_put(struct net_device *dev) | |
1745 | { | |
1746 | atomic_dec(&dev->refcnt); | |
1747 | } | |
1748 | ||
1749 | /** | |
1750 | * dev_hold - get reference to device | |
1751 | * @dev: network device | |
1752 | * | |
1753 | * Hold reference to device to keep it from being freed. | |
1754 | */ | |
1755 | static inline void dev_hold(struct net_device *dev) | |
1756 | { | |
1757 | atomic_inc(&dev->refcnt); | |
1758 | } | |
1759 | ||
1760 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1761 | * and _off may be called from IRQ context, but it is caller | |
1762 | * who is responsible for serialization of these calls. | |
1763 | * | |
1764 | * The name carrier is inappropriate, these functions should really be | |
1765 | * called netif_lowerlayer_*() because they represent the state of any | |
1766 | * kind of lower layer not just hardware media. | |
1767 | */ | |
1768 | ||
1769 | extern void linkwatch_fire_event(struct net_device *dev); | |
1770 | extern void linkwatch_forget_dev(struct net_device *dev); | |
1771 | ||
1772 | /** | |
1773 | * netif_carrier_ok - test if carrier present | |
1774 | * @dev: network device | |
1775 | * | |
1776 | * Check if carrier is present on device | |
1777 | */ | |
1778 | static inline int netif_carrier_ok(const struct net_device *dev) | |
1779 | { | |
1780 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1781 | } | |
1782 | ||
1783 | extern unsigned long dev_trans_start(struct net_device *dev); | |
1784 | ||
1785 | extern void __netdev_watchdog_up(struct net_device *dev); | |
1786 | ||
1787 | extern void netif_carrier_on(struct net_device *dev); | |
1788 | ||
1789 | extern void netif_carrier_off(struct net_device *dev); | |
1790 | ||
1791 | extern void netif_notify_peers(struct net_device *dev); | |
1792 | ||
1793 | /** | |
1794 | * netif_dormant_on - mark device as dormant. | |
1795 | * @dev: network device | |
1796 | * | |
1797 | * Mark device as dormant (as per RFC2863). | |
1798 | * | |
1799 | * The dormant state indicates that the relevant interface is not | |
1800 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1801 | * in a "pending" state, waiting for some external event. For "on- | |
1802 | * demand" interfaces, this new state identifies the situation where the | |
1803 | * interface is waiting for events to place it in the up state. | |
1804 | * | |
1805 | */ | |
1806 | static inline void netif_dormant_on(struct net_device *dev) | |
1807 | { | |
1808 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1809 | linkwatch_fire_event(dev); | |
1810 | } | |
1811 | ||
1812 | /** | |
1813 | * netif_dormant_off - set device as not dormant. | |
1814 | * @dev: network device | |
1815 | * | |
1816 | * Device is not in dormant state. | |
1817 | */ | |
1818 | static inline void netif_dormant_off(struct net_device *dev) | |
1819 | { | |
1820 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1821 | linkwatch_fire_event(dev); | |
1822 | } | |
1823 | ||
1824 | /** | |
1825 | * netif_dormant - test if carrier present | |
1826 | * @dev: network device | |
1827 | * | |
1828 | * Check if carrier is present on device | |
1829 | */ | |
1830 | static inline int netif_dormant(const struct net_device *dev) | |
1831 | { | |
1832 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1833 | } | |
1834 | ||
1835 | ||
1836 | /** | |
1837 | * netif_oper_up - test if device is operational | |
1838 | * @dev: network device | |
1839 | * | |
1840 | * Check if carrier is operational | |
1841 | */ | |
1842 | static inline int netif_oper_up(const struct net_device *dev) | |
1843 | { | |
1844 | return (dev->operstate == IF_OPER_UP || | |
1845 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1846 | } | |
1847 | ||
1848 | /** | |
1849 | * netif_device_present - is device available or removed | |
1850 | * @dev: network device | |
1851 | * | |
1852 | * Check if device has not been removed from system. | |
1853 | */ | |
1854 | static inline int netif_device_present(struct net_device *dev) | |
1855 | { | |
1856 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1857 | } | |
1858 | ||
1859 | extern void netif_device_detach(struct net_device *dev); | |
1860 | ||
1861 | extern void netif_device_attach(struct net_device *dev); | |
1862 | ||
1863 | /* | |
1864 | * Network interface message level settings | |
1865 | */ | |
1866 | #define HAVE_NETIF_MSG 1 | |
1867 | ||
1868 | enum { | |
1869 | NETIF_MSG_DRV = 0x0001, | |
1870 | NETIF_MSG_PROBE = 0x0002, | |
1871 | NETIF_MSG_LINK = 0x0004, | |
1872 | NETIF_MSG_TIMER = 0x0008, | |
1873 | NETIF_MSG_IFDOWN = 0x0010, | |
1874 | NETIF_MSG_IFUP = 0x0020, | |
1875 | NETIF_MSG_RX_ERR = 0x0040, | |
1876 | NETIF_MSG_TX_ERR = 0x0080, | |
1877 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1878 | NETIF_MSG_INTR = 0x0200, | |
1879 | NETIF_MSG_TX_DONE = 0x0400, | |
1880 | NETIF_MSG_RX_STATUS = 0x0800, | |
1881 | NETIF_MSG_PKTDATA = 0x1000, | |
1882 | NETIF_MSG_HW = 0x2000, | |
1883 | NETIF_MSG_WOL = 0x4000, | |
1884 | }; | |
1885 | ||
1886 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1887 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1888 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1889 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1890 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1891 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1892 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1893 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1894 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1895 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1896 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1897 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1898 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1899 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1900 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1901 | ||
1902 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1903 | { | |
1904 | /* use default */ | |
1905 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1906 | return default_msg_enable_bits; | |
1907 | if (debug_value == 0) /* no output */ | |
1908 | return 0; | |
1909 | /* set low N bits */ | |
1910 | return (1 << debug_value) - 1; | |
1911 | } | |
1912 | ||
1913 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) | |
1914 | { | |
1915 | spin_lock(&txq->_xmit_lock); | |
1916 | txq->xmit_lock_owner = cpu; | |
1917 | } | |
1918 | ||
1919 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) | |
1920 | { | |
1921 | spin_lock_bh(&txq->_xmit_lock); | |
1922 | txq->xmit_lock_owner = smp_processor_id(); | |
1923 | } | |
1924 | ||
1925 | static inline int __netif_tx_trylock(struct netdev_queue *txq) | |
1926 | { | |
1927 | int ok = spin_trylock(&txq->_xmit_lock); | |
1928 | if (likely(ok)) | |
1929 | txq->xmit_lock_owner = smp_processor_id(); | |
1930 | return ok; | |
1931 | } | |
1932 | ||
1933 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
1934 | { | |
1935 | txq->xmit_lock_owner = -1; | |
1936 | spin_unlock(&txq->_xmit_lock); | |
1937 | } | |
1938 | ||
1939 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
1940 | { | |
1941 | txq->xmit_lock_owner = -1; | |
1942 | spin_unlock_bh(&txq->_xmit_lock); | |
1943 | } | |
1944 | ||
1945 | static inline void txq_trans_update(struct netdev_queue *txq) | |
1946 | { | |
1947 | if (txq->xmit_lock_owner != -1) | |
1948 | txq->trans_start = jiffies; | |
1949 | } | |
1950 | ||
1951 | /** | |
1952 | * netif_tx_lock - grab network device transmit lock | |
1953 | * @dev: network device | |
1954 | * | |
1955 | * Get network device transmit lock | |
1956 | */ | |
1957 | static inline void netif_tx_lock(struct net_device *dev) | |
1958 | { | |
1959 | unsigned int i; | |
1960 | int cpu; | |
1961 | ||
1962 | spin_lock(&dev->tx_global_lock); | |
1963 | cpu = smp_processor_id(); | |
1964 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1965 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1966 | ||
1967 | /* We are the only thread of execution doing a | |
1968 | * freeze, but we have to grab the _xmit_lock in | |
1969 | * order to synchronize with threads which are in | |
1970 | * the ->hard_start_xmit() handler and already | |
1971 | * checked the frozen bit. | |
1972 | */ | |
1973 | __netif_tx_lock(txq, cpu); | |
1974 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
1975 | __netif_tx_unlock(txq); | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1980 | { | |
1981 | local_bh_disable(); | |
1982 | netif_tx_lock(dev); | |
1983 | } | |
1984 | ||
1985 | static inline void netif_tx_unlock(struct net_device *dev) | |
1986 | { | |
1987 | unsigned int i; | |
1988 | ||
1989 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1990 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1991 | ||
1992 | /* No need to grab the _xmit_lock here. If the | |
1993 | * queue is not stopped for another reason, we | |
1994 | * force a schedule. | |
1995 | */ | |
1996 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
1997 | netif_schedule_queue(txq); | |
1998 | } | |
1999 | spin_unlock(&dev->tx_global_lock); | |
2000 | } | |
2001 | ||
2002 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
2003 | { | |
2004 | netif_tx_unlock(dev); | |
2005 | local_bh_enable(); | |
2006 | } | |
2007 | ||
2008 | #define HARD_TX_LOCK(dev, txq, cpu) { \ | |
2009 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
2010 | __netif_tx_lock(txq, cpu); \ | |
2011 | } \ | |
2012 | } | |
2013 | ||
2014 | #define HARD_TX_UNLOCK(dev, txq) { \ | |
2015 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
2016 | __netif_tx_unlock(txq); \ | |
2017 | } \ | |
2018 | } | |
2019 | ||
2020 | static inline void netif_tx_disable(struct net_device *dev) | |
2021 | { | |
2022 | unsigned int i; | |
2023 | int cpu; | |
2024 | ||
2025 | local_bh_disable(); | |
2026 | cpu = smp_processor_id(); | |
2027 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2028 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2029 | ||
2030 | __netif_tx_lock(txq, cpu); | |
2031 | netif_tx_stop_queue(txq); | |
2032 | __netif_tx_unlock(txq); | |
2033 | } | |
2034 | local_bh_enable(); | |
2035 | } | |
2036 | ||
2037 | static inline void netif_addr_lock(struct net_device *dev) | |
2038 | { | |
2039 | spin_lock(&dev->addr_list_lock); | |
2040 | } | |
2041 | ||
2042 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
2043 | { | |
2044 | spin_lock_bh(&dev->addr_list_lock); | |
2045 | } | |
2046 | ||
2047 | static inline void netif_addr_unlock(struct net_device *dev) | |
2048 | { | |
2049 | spin_unlock(&dev->addr_list_lock); | |
2050 | } | |
2051 | ||
2052 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
2053 | { | |
2054 | spin_unlock_bh(&dev->addr_list_lock); | |
2055 | } | |
2056 | ||
2057 | /* | |
2058 | * dev_addrs walker. Should be used only for read access. Call with | |
2059 | * rcu_read_lock held. | |
2060 | */ | |
2061 | #define for_each_dev_addr(dev, ha) \ | |
2062 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) | |
2063 | ||
2064 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
2065 | ||
2066 | extern void ether_setup(struct net_device *dev); | |
2067 | ||
2068 | /* Support for loadable net-drivers */ | |
2069 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, | |
2070 | void (*setup)(struct net_device *), | |
2071 | unsigned int queue_count); | |
2072 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
2073 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
2074 | extern int register_netdev(struct net_device *dev); | |
2075 | extern void unregister_netdev(struct net_device *dev); | |
2076 | ||
2077 | /* General hardware address lists handling functions */ | |
2078 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
2079 | struct netdev_hw_addr_list *from_list, | |
2080 | int addr_len, unsigned char addr_type); | |
2081 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, | |
2082 | struct netdev_hw_addr_list *from_list, | |
2083 | int addr_len, unsigned char addr_type); | |
2084 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, | |
2085 | struct netdev_hw_addr_list *from_list, | |
2086 | int addr_len); | |
2087 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
2088 | struct netdev_hw_addr_list *from_list, | |
2089 | int addr_len); | |
2090 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); | |
2091 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); | |
2092 | ||
2093 | /* Functions used for device addresses handling */ | |
2094 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
2095 | unsigned char addr_type); | |
2096 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
2097 | unsigned char addr_type); | |
2098 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
2099 | struct net_device *from_dev, | |
2100 | unsigned char addr_type); | |
2101 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
2102 | struct net_device *from_dev, | |
2103 | unsigned char addr_type); | |
2104 | extern void dev_addr_flush(struct net_device *dev); | |
2105 | extern int dev_addr_init(struct net_device *dev); | |
2106 | ||
2107 | /* Functions used for unicast addresses handling */ | |
2108 | extern int dev_uc_add(struct net_device *dev, unsigned char *addr); | |
2109 | extern int dev_uc_del(struct net_device *dev, unsigned char *addr); | |
2110 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); | |
2111 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
2112 | extern void dev_uc_flush(struct net_device *dev); | |
2113 | extern void dev_uc_init(struct net_device *dev); | |
2114 | ||
2115 | /* Functions used for multicast addresses handling */ | |
2116 | extern int dev_mc_add(struct net_device *dev, unsigned char *addr); | |
2117 | extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); | |
2118 | extern int dev_mc_del(struct net_device *dev, unsigned char *addr); | |
2119 | extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); | |
2120 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
2121 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
2122 | extern void dev_mc_flush(struct net_device *dev); | |
2123 | extern void dev_mc_init(struct net_device *dev); | |
2124 | ||
2125 | /* Functions used for secondary unicast and multicast support */ | |
2126 | extern void dev_set_rx_mode(struct net_device *dev); | |
2127 | extern void __dev_set_rx_mode(struct net_device *dev); | |
2128 | extern int dev_set_promiscuity(struct net_device *dev, int inc); | |
2129 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
2130 | extern void netdev_state_change(struct net_device *dev); | |
2131 | extern int netdev_bonding_change(struct net_device *dev, | |
2132 | unsigned long event); | |
2133 | extern void netdev_features_change(struct net_device *dev); | |
2134 | /* Load a device via the kmod */ | |
2135 | extern void dev_load(struct net *net, const char *name); | |
2136 | extern void dev_mcast_init(void); | |
2137 | extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
2138 | struct rtnl_link_stats64 *storage); | |
2139 | extern void dev_txq_stats_fold(const struct net_device *dev, | |
2140 | struct rtnl_link_stats64 *stats); | |
2141 | ||
2142 | extern int netdev_max_backlog; | |
2143 | extern int netdev_tstamp_prequeue; | |
2144 | extern int weight_p; | |
2145 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
2146 | extern int skb_checksum_help(struct sk_buff *skb); | |
2147 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); | |
2148 | #ifdef CONFIG_BUG | |
2149 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
2150 | #else | |
2151 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
2152 | { | |
2153 | } | |
2154 | #endif | |
2155 | /* rx skb timestamps */ | |
2156 | extern void net_enable_timestamp(void); | |
2157 | extern void net_disable_timestamp(void); | |
2158 | ||
2159 | #ifdef CONFIG_PROC_FS | |
2160 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
2161 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
2162 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
2163 | #endif | |
2164 | ||
2165 | extern int netdev_class_create_file(struct class_attribute *class_attr); | |
2166 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
2167 | ||
2168 | extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); | |
2169 | ||
2170 | extern void linkwatch_run_queue(void); | |
2171 | ||
2172 | unsigned long netdev_increment_features(unsigned long all, unsigned long one, | |
2173 | unsigned long mask); | |
2174 | unsigned long netdev_fix_features(unsigned long features, const char *name); | |
2175 | ||
2176 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, | |
2177 | struct net_device *dev); | |
2178 | ||
2179 | static inline int net_gso_ok(int features, int gso_type) | |
2180 | { | |
2181 | int feature = gso_type << NETIF_F_GSO_SHIFT; | |
2182 | return (features & feature) == feature; | |
2183 | } | |
2184 | ||
2185 | static inline int skb_gso_ok(struct sk_buff *skb, int features) | |
2186 | { | |
2187 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && | |
2188 | (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); | |
2189 | } | |
2190 | ||
2191 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) | |
2192 | { | |
2193 | return skb_is_gso(skb) && | |
2194 | (!skb_gso_ok(skb, dev->features) || | |
2195 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); | |
2196 | } | |
2197 | ||
2198 | static inline void netif_set_gso_max_size(struct net_device *dev, | |
2199 | unsigned int size) | |
2200 | { | |
2201 | dev->gso_max_size = size; | |
2202 | } | |
2203 | ||
2204 | extern int __skb_bond_should_drop(struct sk_buff *skb, | |
2205 | struct net_device *master); | |
2206 | ||
2207 | static inline int skb_bond_should_drop(struct sk_buff *skb, | |
2208 | struct net_device *master) | |
2209 | { | |
2210 | if (master) | |
2211 | return __skb_bond_should_drop(skb, master); | |
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | extern struct pernet_operations __net_initdata loopback_net_ops; | |
2216 | ||
2217 | static inline int dev_ethtool_get_settings(struct net_device *dev, | |
2218 | struct ethtool_cmd *cmd) | |
2219 | { | |
2220 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) | |
2221 | return -EOPNOTSUPP; | |
2222 | return dev->ethtool_ops->get_settings(dev, cmd); | |
2223 | } | |
2224 | ||
2225 | static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) | |
2226 | { | |
2227 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) | |
2228 | return 0; | |
2229 | return dev->ethtool_ops->get_rx_csum(dev); | |
2230 | } | |
2231 | ||
2232 | static inline u32 dev_ethtool_get_flags(struct net_device *dev) | |
2233 | { | |
2234 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) | |
2235 | return 0; | |
2236 | return dev->ethtool_ops->get_flags(dev); | |
2237 | } | |
2238 | ||
2239 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ | |
2240 | ||
2241 | /* netdev_printk helpers, similar to dev_printk */ | |
2242 | ||
2243 | static inline const char *netdev_name(const struct net_device *dev) | |
2244 | { | |
2245 | if (dev->reg_state != NETREG_REGISTERED) | |
2246 | return "(unregistered net_device)"; | |
2247 | return dev->name; | |
2248 | } | |
2249 | ||
2250 | extern int netdev_printk(const char *level, const struct net_device *dev, | |
2251 | const char *format, ...) | |
2252 | __attribute__ ((format (printf, 3, 4))); | |
2253 | extern int netdev_emerg(const struct net_device *dev, const char *format, ...) | |
2254 | __attribute__ ((format (printf, 2, 3))); | |
2255 | extern int netdev_alert(const struct net_device *dev, const char *format, ...) | |
2256 | __attribute__ ((format (printf, 2, 3))); | |
2257 | extern int netdev_crit(const struct net_device *dev, const char *format, ...) | |
2258 | __attribute__ ((format (printf, 2, 3))); | |
2259 | extern int netdev_err(const struct net_device *dev, const char *format, ...) | |
2260 | __attribute__ ((format (printf, 2, 3))); | |
2261 | extern int netdev_warn(const struct net_device *dev, const char *format, ...) | |
2262 | __attribute__ ((format (printf, 2, 3))); | |
2263 | extern int netdev_notice(const struct net_device *dev, const char *format, ...) | |
2264 | __attribute__ ((format (printf, 2, 3))); | |
2265 | extern int netdev_info(const struct net_device *dev, const char *format, ...) | |
2266 | __attribute__ ((format (printf, 2, 3))); | |
2267 | ||
2268 | #if defined(DEBUG) | |
2269 | #define netdev_dbg(__dev, format, args...) \ | |
2270 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
2271 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2272 | #define netdev_dbg(__dev, format, args...) \ | |
2273 | do { \ | |
2274 | dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \ | |
2275 | netdev_name(__dev), ##args); \ | |
2276 | } while (0) | |
2277 | #else | |
2278 | #define netdev_dbg(__dev, format, args...) \ | |
2279 | ({ \ | |
2280 | if (0) \ | |
2281 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
2282 | 0; \ | |
2283 | }) | |
2284 | #endif | |
2285 | ||
2286 | #if defined(VERBOSE_DEBUG) | |
2287 | #define netdev_vdbg netdev_dbg | |
2288 | #else | |
2289 | ||
2290 | #define netdev_vdbg(dev, format, args...) \ | |
2291 | ({ \ | |
2292 | if (0) \ | |
2293 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
2294 | 0; \ | |
2295 | }) | |
2296 | #endif | |
2297 | ||
2298 | /* | |
2299 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
2300 | * of using a WARN/WARN_ON to get the message out, including the | |
2301 | * file/line information and a backtrace. | |
2302 | */ | |
2303 | #define netdev_WARN(dev, format, args...) \ | |
2304 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); | |
2305 | ||
2306 | /* netif printk helpers, similar to netdev_printk */ | |
2307 | ||
2308 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
2309 | do { \ | |
2310 | if (netif_msg_##type(priv)) \ | |
2311 | netdev_printk(level, (dev), fmt, ##args); \ | |
2312 | } while (0) | |
2313 | ||
2314 | #define netif_level(level, priv, type, dev, fmt, args...) \ | |
2315 | do { \ | |
2316 | if (netif_msg_##type(priv)) \ | |
2317 | netdev_##level(dev, fmt, ##args); \ | |
2318 | } while (0) | |
2319 | ||
2320 | #define netif_emerg(priv, type, dev, fmt, args...) \ | |
2321 | netif_level(emerg, priv, type, dev, fmt, ##args) | |
2322 | #define netif_alert(priv, type, dev, fmt, args...) \ | |
2323 | netif_level(alert, priv, type, dev, fmt, ##args) | |
2324 | #define netif_crit(priv, type, dev, fmt, args...) \ | |
2325 | netif_level(crit, priv, type, dev, fmt, ##args) | |
2326 | #define netif_err(priv, type, dev, fmt, args...) \ | |
2327 | netif_level(err, priv, type, dev, fmt, ##args) | |
2328 | #define netif_warn(priv, type, dev, fmt, args...) \ | |
2329 | netif_level(warn, priv, type, dev, fmt, ##args) | |
2330 | #define netif_notice(priv, type, dev, fmt, args...) \ | |
2331 | netif_level(notice, priv, type, dev, fmt, ##args) | |
2332 | #define netif_info(priv, type, dev, fmt, args...) \ | |
2333 | netif_level(info, priv, type, dev, fmt, ##args) | |
2334 | ||
2335 | #if defined(DEBUG) | |
2336 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2337 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
2338 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2339 | #define netif_dbg(priv, type, netdev, format, args...) \ | |
2340 | do { \ | |
2341 | if (netif_msg_##type(priv)) \ | |
2342 | dynamic_dev_dbg((netdev)->dev.parent, \ | |
2343 | "%s: " format, \ | |
2344 | netdev_name(netdev), ##args); \ | |
2345 | } while (0) | |
2346 | #else | |
2347 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2348 | ({ \ | |
2349 | if (0) \ | |
2350 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
2351 | 0; \ | |
2352 | }) | |
2353 | #endif | |
2354 | ||
2355 | #if defined(VERBOSE_DEBUG) | |
2356 | #define netif_vdbg netif_dbg | |
2357 | #else | |
2358 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
2359 | ({ \ | |
2360 | if (0) \ | |
2361 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
2362 | 0; \ | |
2363 | }) | |
2364 | #endif | |
2365 | ||
2366 | #endif /* __KERNEL__ */ | |
2367 | ||
2368 | #endif /* _LINUX_NETDEVICE_H */ |