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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.Cox@linux.org> | |
15 | * Bjorn Ekwall. <bj0rn@blox.se> | |
16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | * | |
23 | * Moved to /usr/include/linux for NET3 | |
24 | */ | |
25 | #ifndef _LINUX_NETDEVICE_H | |
26 | #define _LINUX_NETDEVICE_H | |
27 | ||
28 | #include <linux/if.h> | |
29 | #include <linux/if_ether.h> | |
30 | #include <linux/if_packet.h> | |
31 | ||
32 | #ifdef __KERNEL__ | |
33 | #include <linux/timer.h> | |
34 | #include <linux/delay.h> | |
35 | #include <asm/atomic.h> | |
36 | #include <asm/cache.h> | |
37 | #include <asm/byteorder.h> | |
38 | ||
39 | #include <linux/device.h> | |
40 | #include <linux/percpu.h> | |
41 | #include <linux/dmaengine.h> | |
42 | #include <linux/workqueue.h> | |
43 | ||
44 | #include <net/net_namespace.h> | |
45 | ||
46 | struct vlan_group; | |
47 | struct ethtool_ops; | |
48 | struct netpoll_info; | |
49 | /* 802.11 specific */ | |
50 | struct wireless_dev; | |
51 | /* source back-compat hooks */ | |
52 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
53 | ( (netdev)->ethtool_ops = (ops) ) | |
54 | ||
55 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
56 | functions are available. */ | |
57 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
58 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
59 | ||
60 | #define NET_XMIT_SUCCESS 0 | |
61 | #define NET_XMIT_DROP 1 /* skb dropped */ | |
62 | #define NET_XMIT_CN 2 /* congestion notification */ | |
63 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ | |
64 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; | |
65 | (TC use only - dev_queue_xmit | |
66 | returns this as NET_XMIT_SUCCESS) */ | |
67 | ||
68 | /* Backlog congestion levels */ | |
69 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
70 | #define NET_RX_DROP 1 /* packet dropped */ | |
71 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ | |
72 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ | |
73 | #define NET_RX_CN_HIGH 4 /* The storm is here */ | |
74 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ | |
75 | ||
76 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It | |
77 | * indicates that the device will soon be dropping packets, or already drops | |
78 | * some packets of the same priority; prompting us to send less aggressively. */ | |
79 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) | |
80 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) | |
81 | ||
82 | #endif | |
83 | ||
84 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
85 | ||
86 | /* Driver transmit return codes */ | |
87 | #define NETDEV_TX_OK 0 /* driver took care of packet */ | |
88 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ | |
89 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ | |
90 | ||
91 | #ifdef __KERNEL__ | |
92 | ||
93 | /* | |
94 | * Compute the worst case header length according to the protocols | |
95 | * used. | |
96 | */ | |
97 | ||
98 | #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) | |
99 | # if defined(CONFIG_MAC80211_MESH) | |
100 | # define LL_MAX_HEADER 128 | |
101 | # else | |
102 | # define LL_MAX_HEADER 96 | |
103 | # endif | |
104 | #elif defined(CONFIG_TR) | |
105 | # define LL_MAX_HEADER 48 | |
106 | #else | |
107 | # define LL_MAX_HEADER 32 | |
108 | #endif | |
109 | ||
110 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ | |
111 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
112 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
113 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
114 | #define MAX_HEADER LL_MAX_HEADER | |
115 | #else | |
116 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
117 | #endif | |
118 | ||
119 | #endif /* __KERNEL__ */ | |
120 | ||
121 | struct net_device_subqueue | |
122 | { | |
123 | /* Give a control state for each queue. This struct may contain | |
124 | * per-queue locks in the future. | |
125 | */ | |
126 | unsigned long state; | |
127 | }; | |
128 | ||
129 | /* | |
130 | * Network device statistics. Akin to the 2.0 ether stats but | |
131 | * with byte counters. | |
132 | */ | |
133 | ||
134 | struct net_device_stats | |
135 | { | |
136 | unsigned long rx_packets; /* total packets received */ | |
137 | unsigned long tx_packets; /* total packets transmitted */ | |
138 | unsigned long rx_bytes; /* total bytes received */ | |
139 | unsigned long tx_bytes; /* total bytes transmitted */ | |
140 | unsigned long rx_errors; /* bad packets received */ | |
141 | unsigned long tx_errors; /* packet transmit problems */ | |
142 | unsigned long rx_dropped; /* no space in linux buffers */ | |
143 | unsigned long tx_dropped; /* no space available in linux */ | |
144 | unsigned long multicast; /* multicast packets received */ | |
145 | unsigned long collisions; | |
146 | ||
147 | /* detailed rx_errors: */ | |
148 | unsigned long rx_length_errors; | |
149 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
150 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
151 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
152 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
153 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
154 | ||
155 | /* detailed tx_errors */ | |
156 | unsigned long tx_aborted_errors; | |
157 | unsigned long tx_carrier_errors; | |
158 | unsigned long tx_fifo_errors; | |
159 | unsigned long tx_heartbeat_errors; | |
160 | unsigned long tx_window_errors; | |
161 | ||
162 | /* for cslip etc */ | |
163 | unsigned long rx_compressed; | |
164 | unsigned long tx_compressed; | |
165 | }; | |
166 | ||
167 | ||
168 | /* Media selection options. */ | |
169 | enum { | |
170 | IF_PORT_UNKNOWN = 0, | |
171 | IF_PORT_10BASE2, | |
172 | IF_PORT_10BASET, | |
173 | IF_PORT_AUI, | |
174 | IF_PORT_100BASET, | |
175 | IF_PORT_100BASETX, | |
176 | IF_PORT_100BASEFX | |
177 | }; | |
178 | ||
179 | #ifdef __KERNEL__ | |
180 | ||
181 | #include <linux/cache.h> | |
182 | #include <linux/skbuff.h> | |
183 | ||
184 | struct neighbour; | |
185 | struct neigh_parms; | |
186 | struct sk_buff; | |
187 | ||
188 | struct netif_rx_stats | |
189 | { | |
190 | unsigned total; | |
191 | unsigned dropped; | |
192 | unsigned time_squeeze; | |
193 | unsigned cpu_collision; | |
194 | }; | |
195 | ||
196 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
197 | ||
198 | struct dev_addr_list | |
199 | { | |
200 | struct dev_addr_list *next; | |
201 | u8 da_addr[MAX_ADDR_LEN]; | |
202 | u8 da_addrlen; | |
203 | u8 da_synced; | |
204 | int da_users; | |
205 | int da_gusers; | |
206 | }; | |
207 | ||
208 | /* | |
209 | * We tag multicasts with these structures. | |
210 | */ | |
211 | ||
212 | #define dev_mc_list dev_addr_list | |
213 | #define dmi_addr da_addr | |
214 | #define dmi_addrlen da_addrlen | |
215 | #define dmi_users da_users | |
216 | #define dmi_gusers da_gusers | |
217 | ||
218 | struct hh_cache | |
219 | { | |
220 | struct hh_cache *hh_next; /* Next entry */ | |
221 | atomic_t hh_refcnt; /* number of users */ | |
222 | /* | |
223 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
224 | * cache line on SMP. | |
225 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
226 | * incurring cache line ping pongs. | |
227 | */ | |
228 | __be16 hh_type ____cacheline_aligned_in_smp; | |
229 | /* protocol identifier, f.e ETH_P_IP | |
230 | * NOTE: For VLANs, this will be the | |
231 | * encapuslated type. --BLG | |
232 | */ | |
233 | u16 hh_len; /* length of header */ | |
234 | int (*hh_output)(struct sk_buff *skb); | |
235 | seqlock_t hh_lock; | |
236 | ||
237 | /* cached hardware header; allow for machine alignment needs. */ | |
238 | #define HH_DATA_MOD 16 | |
239 | #define HH_DATA_OFF(__len) \ | |
240 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) | |
241 | #define HH_DATA_ALIGN(__len) \ | |
242 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
243 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
244 | }; | |
245 | ||
246 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
247 | * Alternative is: | |
248 | * dev->hard_header_len ? (dev->hard_header_len + | |
249 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
250 | * | |
251 | * We could use other alignment values, but we must maintain the | |
252 | * relationship HH alignment <= LL alignment. | |
253 | * | |
254 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device | |
255 | * may need. | |
256 | */ | |
257 | #define LL_RESERVED_SPACE(dev) \ | |
258 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
259 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ | |
260 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
261 | #define LL_ALLOCATED_SPACE(dev) \ | |
262 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
263 | ||
264 | struct header_ops { | |
265 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
266 | unsigned short type, const void *daddr, | |
267 | const void *saddr, unsigned len); | |
268 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
269 | int (*rebuild)(struct sk_buff *skb); | |
270 | #define HAVE_HEADER_CACHE | |
271 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); | |
272 | void (*cache_update)(struct hh_cache *hh, | |
273 | const struct net_device *dev, | |
274 | const unsigned char *haddr); | |
275 | }; | |
276 | ||
277 | /* These flag bits are private to the generic network queueing | |
278 | * layer, they may not be explicitly referenced by any other | |
279 | * code. | |
280 | */ | |
281 | ||
282 | enum netdev_state_t | |
283 | { | |
284 | __LINK_STATE_START, | |
285 | __LINK_STATE_PRESENT, | |
286 | __LINK_STATE_SCHED, | |
287 | __LINK_STATE_NOCARRIER, | |
288 | __LINK_STATE_LINKWATCH_PENDING, | |
289 | __LINK_STATE_DORMANT, | |
290 | }; | |
291 | ||
292 | ||
293 | /* | |
294 | * This structure holds at boot time configured netdevice settings. They | |
295 | * are then used in the device probing. | |
296 | */ | |
297 | struct netdev_boot_setup { | |
298 | char name[IFNAMSIZ]; | |
299 | struct ifmap map; | |
300 | }; | |
301 | #define NETDEV_BOOT_SETUP_MAX 8 | |
302 | ||
303 | extern int __init netdev_boot_setup(char *str); | |
304 | ||
305 | /* | |
306 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
307 | */ | |
308 | struct napi_struct { | |
309 | /* The poll_list must only be managed by the entity which | |
310 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
311 | * whoever atomically sets that bit can add this napi_struct | |
312 | * to the per-cpu poll_list, and whoever clears that bit | |
313 | * can remove from the list right before clearing the bit. | |
314 | */ | |
315 | struct list_head poll_list; | |
316 | ||
317 | unsigned long state; | |
318 | int weight; | |
319 | int (*poll)(struct napi_struct *, int); | |
320 | #ifdef CONFIG_NETPOLL | |
321 | spinlock_t poll_lock; | |
322 | int poll_owner; | |
323 | struct net_device *dev; | |
324 | struct list_head dev_list; | |
325 | #endif | |
326 | }; | |
327 | ||
328 | enum | |
329 | { | |
330 | NAPI_STATE_SCHED, /* Poll is scheduled */ | |
331 | NAPI_STATE_DISABLE, /* Disable pending */ | |
332 | }; | |
333 | ||
334 | extern void __napi_schedule(struct napi_struct *n); | |
335 | ||
336 | static inline int napi_disable_pending(struct napi_struct *n) | |
337 | { | |
338 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
339 | } | |
340 | ||
341 | /** | |
342 | * napi_schedule_prep - check if napi can be scheduled | |
343 | * @n: napi context | |
344 | * | |
345 | * Test if NAPI routine is already running, and if not mark | |
346 | * it as running. This is used as a condition variable | |
347 | * insure only one NAPI poll instance runs. We also make | |
348 | * sure there is no pending NAPI disable. | |
349 | */ | |
350 | static inline int napi_schedule_prep(struct napi_struct *n) | |
351 | { | |
352 | return !napi_disable_pending(n) && | |
353 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
354 | } | |
355 | ||
356 | /** | |
357 | * napi_schedule - schedule NAPI poll | |
358 | * @n: napi context | |
359 | * | |
360 | * Schedule NAPI poll routine to be called if it is not already | |
361 | * running. | |
362 | */ | |
363 | static inline void napi_schedule(struct napi_struct *n) | |
364 | { | |
365 | if (napi_schedule_prep(n)) | |
366 | __napi_schedule(n); | |
367 | } | |
368 | ||
369 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ | |
370 | static inline int napi_reschedule(struct napi_struct *napi) | |
371 | { | |
372 | if (napi_schedule_prep(napi)) { | |
373 | __napi_schedule(napi); | |
374 | return 1; | |
375 | } | |
376 | return 0; | |
377 | } | |
378 | ||
379 | /** | |
380 | * napi_complete - NAPI processing complete | |
381 | * @n: napi context | |
382 | * | |
383 | * Mark NAPI processing as complete. | |
384 | */ | |
385 | static inline void __napi_complete(struct napi_struct *n) | |
386 | { | |
387 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
388 | list_del(&n->poll_list); | |
389 | smp_mb__before_clear_bit(); | |
390 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
391 | } | |
392 | ||
393 | static inline void napi_complete(struct napi_struct *n) | |
394 | { | |
395 | unsigned long flags; | |
396 | ||
397 | local_irq_save(flags); | |
398 | __napi_complete(n); | |
399 | local_irq_restore(flags); | |
400 | } | |
401 | ||
402 | /** | |
403 | * napi_disable - prevent NAPI from scheduling | |
404 | * @n: napi context | |
405 | * | |
406 | * Stop NAPI from being scheduled on this context. | |
407 | * Waits till any outstanding processing completes. | |
408 | */ | |
409 | static inline void napi_disable(struct napi_struct *n) | |
410 | { | |
411 | set_bit(NAPI_STATE_DISABLE, &n->state); | |
412 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) | |
413 | msleep(1); | |
414 | clear_bit(NAPI_STATE_DISABLE, &n->state); | |
415 | } | |
416 | ||
417 | /** | |
418 | * napi_enable - enable NAPI scheduling | |
419 | * @n: napi context | |
420 | * | |
421 | * Resume NAPI from being scheduled on this context. | |
422 | * Must be paired with napi_disable. | |
423 | */ | |
424 | static inline void napi_enable(struct napi_struct *n) | |
425 | { | |
426 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
427 | smp_mb__before_clear_bit(); | |
428 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
429 | } | |
430 | ||
431 | #ifdef CONFIG_SMP | |
432 | /** | |
433 | * napi_synchronize - wait until NAPI is not running | |
434 | * @n: napi context | |
435 | * | |
436 | * Wait until NAPI is done being scheduled on this context. | |
437 | * Waits till any outstanding processing completes but | |
438 | * does not disable future activations. | |
439 | */ | |
440 | static inline void napi_synchronize(const struct napi_struct *n) | |
441 | { | |
442 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
443 | msleep(1); | |
444 | } | |
445 | #else | |
446 | # define napi_synchronize(n) barrier() | |
447 | #endif | |
448 | ||
449 | enum netdev_queue_state_t | |
450 | { | |
451 | __QUEUE_STATE_XOFF, | |
452 | __QUEUE_STATE_QDISC_RUNNING, | |
453 | }; | |
454 | ||
455 | struct netdev_queue { | |
456 | spinlock_t lock; | |
457 | struct net_device *dev; | |
458 | struct Qdisc *qdisc; | |
459 | unsigned long state; | |
460 | struct sk_buff *gso_skb; | |
461 | spinlock_t _xmit_lock; | |
462 | int xmit_lock_owner; | |
463 | struct Qdisc *qdisc_sleeping; | |
464 | struct list_head qdisc_list; | |
465 | struct netdev_queue *next_sched; | |
466 | } ____cacheline_aligned_in_smp; | |
467 | ||
468 | /* | |
469 | * The DEVICE structure. | |
470 | * Actually, this whole structure is a big mistake. It mixes I/O | |
471 | * data with strictly "high-level" data, and it has to know about | |
472 | * almost every data structure used in the INET module. | |
473 | * | |
474 | * FIXME: cleanup struct net_device such that network protocol info | |
475 | * moves out. | |
476 | */ | |
477 | ||
478 | struct net_device | |
479 | { | |
480 | ||
481 | /* | |
482 | * This is the first field of the "visible" part of this structure | |
483 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
484 | * the interface. | |
485 | */ | |
486 | char name[IFNAMSIZ]; | |
487 | /* device name hash chain */ | |
488 | struct hlist_node name_hlist; | |
489 | ||
490 | /* | |
491 | * I/O specific fields | |
492 | * FIXME: Merge these and struct ifmap into one | |
493 | */ | |
494 | unsigned long mem_end; /* shared mem end */ | |
495 | unsigned long mem_start; /* shared mem start */ | |
496 | unsigned long base_addr; /* device I/O address */ | |
497 | unsigned int irq; /* device IRQ number */ | |
498 | ||
499 | /* | |
500 | * Some hardware also needs these fields, but they are not | |
501 | * part of the usual set specified in Space.c. | |
502 | */ | |
503 | ||
504 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
505 | unsigned char dma; /* DMA channel */ | |
506 | ||
507 | unsigned long state; | |
508 | ||
509 | struct list_head dev_list; | |
510 | #ifdef CONFIG_NETPOLL | |
511 | struct list_head napi_list; | |
512 | #endif | |
513 | ||
514 | /* The device initialization function. Called only once. */ | |
515 | int (*init)(struct net_device *dev); | |
516 | ||
517 | /* ------- Fields preinitialized in Space.c finish here ------- */ | |
518 | ||
519 | /* Net device features */ | |
520 | unsigned long features; | |
521 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
522 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ | |
523 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ | |
524 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
525 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ | |
526 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ | |
527 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
528 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
529 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
530 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
531 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
532 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ | |
533 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ | |
534 | /* do not use LLTX in new drivers */ | |
535 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ | |
536 | #define NETIF_F_LRO 32768 /* large receive offload */ | |
537 | ||
538 | /* Segmentation offload features */ | |
539 | #define NETIF_F_GSO_SHIFT 16 | |
540 | #define NETIF_F_GSO_MASK 0xffff0000 | |
541 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) | |
542 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) | |
543 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) | |
544 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) | |
545 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
546 | ||
547 | /* List of features with software fallbacks. */ | |
548 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
549 | ||
550 | ||
551 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) | |
552 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) | |
553 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
554 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
555 | ||
556 | /* Interface index. Unique device identifier */ | |
557 | int ifindex; | |
558 | int iflink; | |
559 | ||
560 | ||
561 | struct net_device_stats* (*get_stats)(struct net_device *dev); | |
562 | struct net_device_stats stats; | |
563 | ||
564 | #ifdef CONFIG_WIRELESS_EXT | |
565 | /* List of functions to handle Wireless Extensions (instead of ioctl). | |
566 | * See <net/iw_handler.h> for details. Jean II */ | |
567 | const struct iw_handler_def * wireless_handlers; | |
568 | /* Instance data managed by the core of Wireless Extensions. */ | |
569 | struct iw_public_data * wireless_data; | |
570 | #endif | |
571 | const struct ethtool_ops *ethtool_ops; | |
572 | ||
573 | /* Hardware header description */ | |
574 | const struct header_ops *header_ops; | |
575 | ||
576 | /* | |
577 | * This marks the end of the "visible" part of the structure. All | |
578 | * fields hereafter are internal to the system, and may change at | |
579 | * will (read: may be cleaned up at will). | |
580 | */ | |
581 | ||
582 | ||
583 | unsigned int flags; /* interface flags (a la BSD) */ | |
584 | unsigned short gflags; | |
585 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
586 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
587 | ||
588 | unsigned char operstate; /* RFC2863 operstate */ | |
589 | unsigned char link_mode; /* mapping policy to operstate */ | |
590 | ||
591 | unsigned mtu; /* interface MTU value */ | |
592 | unsigned short type; /* interface hardware type */ | |
593 | unsigned short hard_header_len; /* hardware hdr length */ | |
594 | ||
595 | /* extra head- and tailroom the hardware may need, but not in all cases | |
596 | * can this be guaranteed, especially tailroom. Some cases also use | |
597 | * LL_MAX_HEADER instead to allocate the skb. | |
598 | */ | |
599 | unsigned short needed_headroom; | |
600 | unsigned short needed_tailroom; | |
601 | ||
602 | struct net_device *master; /* Pointer to master device of a group, | |
603 | * which this device is member of. | |
604 | */ | |
605 | ||
606 | /* Interface address info. */ | |
607 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ | |
608 | unsigned char addr_len; /* hardware address length */ | |
609 | unsigned short dev_id; /* for shared network cards */ | |
610 | ||
611 | spinlock_t addr_list_lock; | |
612 | struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ | |
613 | int uc_count; /* Number of installed ucasts */ | |
614 | int uc_promisc; | |
615 | struct dev_addr_list *mc_list; /* Multicast mac addresses */ | |
616 | int mc_count; /* Number of installed mcasts */ | |
617 | unsigned int promiscuity; | |
618 | unsigned int allmulti; | |
619 | ||
620 | ||
621 | /* Protocol specific pointers */ | |
622 | ||
623 | void *atalk_ptr; /* AppleTalk link */ | |
624 | void *ip_ptr; /* IPv4 specific data */ | |
625 | void *dn_ptr; /* DECnet specific data */ | |
626 | void *ip6_ptr; /* IPv6 specific data */ | |
627 | void *ec_ptr; /* Econet specific data */ | |
628 | void *ax25_ptr; /* AX.25 specific data */ | |
629 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, | |
630 | assign before registering */ | |
631 | ||
632 | /* | |
633 | * Cache line mostly used on receive path (including eth_type_trans()) | |
634 | */ | |
635 | unsigned long last_rx; /* Time of last Rx */ | |
636 | /* Interface address info used in eth_type_trans() */ | |
637 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast | |
638 | because most packets are unicast) */ | |
639 | ||
640 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
641 | ||
642 | struct netdev_queue rx_queue; | |
643 | ||
644 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; | |
645 | unsigned int num_tx_queues; | |
646 | unsigned long tx_queue_len; /* Max frames per queue allowed */ | |
647 | ||
648 | /* | |
649 | * One part is mostly used on xmit path (device) | |
650 | */ | |
651 | void *priv; /* pointer to private data */ | |
652 | int (*hard_start_xmit) (struct sk_buff *skb, | |
653 | struct net_device *dev); | |
654 | /* These may be needed for future network-power-down code. */ | |
655 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ | |
656 | ||
657 | int watchdog_timeo; /* used by dev_watchdog() */ | |
658 | struct timer_list watchdog_timer; | |
659 | ||
660 | /* | |
661 | * refcnt is a very hot point, so align it on SMP | |
662 | */ | |
663 | /* Number of references to this device */ | |
664 | atomic_t refcnt ____cacheline_aligned_in_smp; | |
665 | ||
666 | /* delayed register/unregister */ | |
667 | struct list_head todo_list; | |
668 | /* device index hash chain */ | |
669 | struct hlist_node index_hlist; | |
670 | ||
671 | struct net_device *link_watch_next; | |
672 | ||
673 | /* register/unregister state machine */ | |
674 | enum { NETREG_UNINITIALIZED=0, | |
675 | NETREG_REGISTERED, /* completed register_netdevice */ | |
676 | NETREG_UNREGISTERING, /* called unregister_netdevice */ | |
677 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
678 | NETREG_RELEASED, /* called free_netdev */ | |
679 | } reg_state; | |
680 | ||
681 | /* Called after device is detached from network. */ | |
682 | void (*uninit)(struct net_device *dev); | |
683 | /* Called after last user reference disappears. */ | |
684 | void (*destructor)(struct net_device *dev); | |
685 | ||
686 | /* Pointers to interface service routines. */ | |
687 | int (*open)(struct net_device *dev); | |
688 | int (*stop)(struct net_device *dev); | |
689 | #define HAVE_NETDEV_POLL | |
690 | #define HAVE_CHANGE_RX_FLAGS | |
691 | void (*change_rx_flags)(struct net_device *dev, | |
692 | int flags); | |
693 | #define HAVE_SET_RX_MODE | |
694 | void (*set_rx_mode)(struct net_device *dev); | |
695 | #define HAVE_MULTICAST | |
696 | void (*set_multicast_list)(struct net_device *dev); | |
697 | #define HAVE_SET_MAC_ADDR | |
698 | int (*set_mac_address)(struct net_device *dev, | |
699 | void *addr); | |
700 | #define HAVE_VALIDATE_ADDR | |
701 | int (*validate_addr)(struct net_device *dev); | |
702 | #define HAVE_PRIVATE_IOCTL | |
703 | int (*do_ioctl)(struct net_device *dev, | |
704 | struct ifreq *ifr, int cmd); | |
705 | #define HAVE_SET_CONFIG | |
706 | int (*set_config)(struct net_device *dev, | |
707 | struct ifmap *map); | |
708 | #define HAVE_CHANGE_MTU | |
709 | int (*change_mtu)(struct net_device *dev, int new_mtu); | |
710 | ||
711 | #define HAVE_TX_TIMEOUT | |
712 | void (*tx_timeout) (struct net_device *dev); | |
713 | ||
714 | void (*vlan_rx_register)(struct net_device *dev, | |
715 | struct vlan_group *grp); | |
716 | void (*vlan_rx_add_vid)(struct net_device *dev, | |
717 | unsigned short vid); | |
718 | void (*vlan_rx_kill_vid)(struct net_device *dev, | |
719 | unsigned short vid); | |
720 | ||
721 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); | |
722 | #ifdef CONFIG_NETPOLL | |
723 | struct netpoll_info *npinfo; | |
724 | #endif | |
725 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
726 | void (*poll_controller)(struct net_device *dev); | |
727 | #endif | |
728 | ||
729 | #ifdef CONFIG_NET_NS | |
730 | /* Network namespace this network device is inside */ | |
731 | struct net *nd_net; | |
732 | #endif | |
733 | ||
734 | /* mid-layer private */ | |
735 | void *ml_priv; | |
736 | ||
737 | /* bridge stuff */ | |
738 | struct net_bridge_port *br_port; | |
739 | /* macvlan */ | |
740 | struct macvlan_port *macvlan_port; | |
741 | /* GARP */ | |
742 | struct garp_port *garp_port; | |
743 | ||
744 | /* class/net/name entry */ | |
745 | struct device dev; | |
746 | /* space for optional statistics and wireless sysfs groups */ | |
747 | struct attribute_group *sysfs_groups[3]; | |
748 | ||
749 | /* rtnetlink link ops */ | |
750 | const struct rtnl_link_ops *rtnl_link_ops; | |
751 | ||
752 | /* VLAN feature mask */ | |
753 | unsigned long vlan_features; | |
754 | ||
755 | /* for setting kernel sock attribute on TCP connection setup */ | |
756 | #define GSO_MAX_SIZE 65536 | |
757 | unsigned int gso_max_size; | |
758 | ||
759 | /* The TX queue control structures */ | |
760 | unsigned int egress_subqueue_count; | |
761 | struct net_device_subqueue egress_subqueue[1]; | |
762 | }; | |
763 | #define to_net_dev(d) container_of(d, struct net_device, dev) | |
764 | ||
765 | #define NETDEV_ALIGN 32 | |
766 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) | |
767 | ||
768 | static inline | |
769 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
770 | unsigned int index) | |
771 | { | |
772 | return &dev->_tx[index]; | |
773 | } | |
774 | ||
775 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
776 | void (*f)(struct net_device *, | |
777 | struct netdev_queue *, | |
778 | void *), | |
779 | void *arg) | |
780 | { | |
781 | unsigned int i; | |
782 | ||
783 | for (i = 0; i < dev->num_tx_queues; i++) | |
784 | f(dev, &dev->_tx[i], arg); | |
785 | } | |
786 | ||
787 | /* | |
788 | * Net namespace inlines | |
789 | */ | |
790 | static inline | |
791 | struct net *dev_net(const struct net_device *dev) | |
792 | { | |
793 | #ifdef CONFIG_NET_NS | |
794 | return dev->nd_net; | |
795 | #else | |
796 | return &init_net; | |
797 | #endif | |
798 | } | |
799 | ||
800 | static inline | |
801 | void dev_net_set(struct net_device *dev, struct net *net) | |
802 | { | |
803 | #ifdef CONFIG_NET_NS | |
804 | release_net(dev->nd_net); | |
805 | dev->nd_net = hold_net(net); | |
806 | #endif | |
807 | } | |
808 | ||
809 | /** | |
810 | * netdev_priv - access network device private data | |
811 | * @dev: network device | |
812 | * | |
813 | * Get network device private data | |
814 | */ | |
815 | static inline void *netdev_priv(const struct net_device *dev) | |
816 | { | |
817 | return dev->priv; | |
818 | } | |
819 | ||
820 | /* Set the sysfs physical device reference for the network logical device | |
821 | * if set prior to registration will cause a symlink during initialization. | |
822 | */ | |
823 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) | |
824 | ||
825 | /** | |
826 | * netif_napi_add - initialize a napi context | |
827 | * @dev: network device | |
828 | * @napi: napi context | |
829 | * @poll: polling function | |
830 | * @weight: default weight | |
831 | * | |
832 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
833 | * *any* of the other napi related functions. | |
834 | */ | |
835 | static inline void netif_napi_add(struct net_device *dev, | |
836 | struct napi_struct *napi, | |
837 | int (*poll)(struct napi_struct *, int), | |
838 | int weight) | |
839 | { | |
840 | INIT_LIST_HEAD(&napi->poll_list); | |
841 | napi->poll = poll; | |
842 | napi->weight = weight; | |
843 | #ifdef CONFIG_NETPOLL | |
844 | napi->dev = dev; | |
845 | list_add(&napi->dev_list, &dev->napi_list); | |
846 | spin_lock_init(&napi->poll_lock); | |
847 | napi->poll_owner = -1; | |
848 | #endif | |
849 | set_bit(NAPI_STATE_SCHED, &napi->state); | |
850 | } | |
851 | ||
852 | /** | |
853 | * netif_napi_del - remove a napi context | |
854 | * @napi: napi context | |
855 | * | |
856 | * netif_napi_del() removes a napi context from the network device napi list | |
857 | */ | |
858 | static inline void netif_napi_del(struct napi_struct *napi) | |
859 | { | |
860 | #ifdef CONFIG_NETPOLL | |
861 | list_del(&napi->dev_list); | |
862 | #endif | |
863 | } | |
864 | ||
865 | struct packet_type { | |
866 | __be16 type; /* This is really htons(ether_type). */ | |
867 | struct net_device *dev; /* NULL is wildcarded here */ | |
868 | int (*func) (struct sk_buff *, | |
869 | struct net_device *, | |
870 | struct packet_type *, | |
871 | struct net_device *); | |
872 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, | |
873 | int features); | |
874 | int (*gso_send_check)(struct sk_buff *skb); | |
875 | void *af_packet_priv; | |
876 | struct list_head list; | |
877 | }; | |
878 | ||
879 | #include <linux/interrupt.h> | |
880 | #include <linux/notifier.h> | |
881 | ||
882 | extern rwlock_t dev_base_lock; /* Device list lock */ | |
883 | ||
884 | ||
885 | #define for_each_netdev(net, d) \ | |
886 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
887 | #define for_each_netdev_safe(net, d, n) \ | |
888 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
889 | #define for_each_netdev_continue(net, d) \ | |
890 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
891 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) | |
892 | ||
893 | static inline struct net_device *next_net_device(struct net_device *dev) | |
894 | { | |
895 | struct list_head *lh; | |
896 | struct net *net; | |
897 | ||
898 | net = dev_net(dev); | |
899 | lh = dev->dev_list.next; | |
900 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
901 | } | |
902 | ||
903 | static inline struct net_device *first_net_device(struct net *net) | |
904 | { | |
905 | return list_empty(&net->dev_base_head) ? NULL : | |
906 | net_device_entry(net->dev_base_head.next); | |
907 | } | |
908 | ||
909 | extern int netdev_boot_setup_check(struct net_device *dev); | |
910 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
911 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); | |
912 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
913 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
914 | extern void dev_add_pack(struct packet_type *pt); | |
915 | extern void dev_remove_pack(struct packet_type *pt); | |
916 | extern void __dev_remove_pack(struct packet_type *pt); | |
917 | ||
918 | extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, | |
919 | unsigned short mask); | |
920 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); | |
921 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
922 | extern int dev_alloc_name(struct net_device *dev, const char *name); | |
923 | extern int dev_open(struct net_device *dev); | |
924 | extern int dev_close(struct net_device *dev); | |
925 | extern void dev_disable_lro(struct net_device *dev); | |
926 | extern int dev_queue_xmit(struct sk_buff *skb); | |
927 | extern int register_netdevice(struct net_device *dev); | |
928 | extern void unregister_netdevice(struct net_device *dev); | |
929 | extern void free_netdev(struct net_device *dev); | |
930 | extern void synchronize_net(void); | |
931 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
932 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
933 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); | |
934 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); | |
935 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
936 | extern int dev_restart(struct net_device *dev); | |
937 | #ifdef CONFIG_NETPOLL_TRAP | |
938 | extern int netpoll_trap(void); | |
939 | #endif | |
940 | ||
941 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, | |
942 | unsigned short type, | |
943 | const void *daddr, const void *saddr, | |
944 | unsigned len) | |
945 | { | |
946 | if (!dev->header_ops || !dev->header_ops->create) | |
947 | return 0; | |
948 | ||
949 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
950 | } | |
951 | ||
952 | static inline int dev_parse_header(const struct sk_buff *skb, | |
953 | unsigned char *haddr) | |
954 | { | |
955 | const struct net_device *dev = skb->dev; | |
956 | ||
957 | if (!dev->header_ops || !dev->header_ops->parse) | |
958 | return 0; | |
959 | return dev->header_ops->parse(skb, haddr); | |
960 | } | |
961 | ||
962 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); | |
963 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
964 | static inline int unregister_gifconf(unsigned int family) | |
965 | { | |
966 | return register_gifconf(family, NULL); | |
967 | } | |
968 | ||
969 | /* | |
970 | * Incoming packets are placed on per-cpu queues so that | |
971 | * no locking is needed. | |
972 | */ | |
973 | struct softnet_data | |
974 | { | |
975 | struct netdev_queue *output_queue; | |
976 | struct sk_buff_head input_pkt_queue; | |
977 | struct list_head poll_list; | |
978 | struct sk_buff *completion_queue; | |
979 | ||
980 | struct napi_struct backlog; | |
981 | #ifdef CONFIG_NET_DMA | |
982 | struct dma_chan *net_dma; | |
983 | #endif | |
984 | }; | |
985 | ||
986 | DECLARE_PER_CPU(struct softnet_data,softnet_data); | |
987 | ||
988 | #define HAVE_NETIF_QUEUE | |
989 | ||
990 | extern void __netif_schedule(struct netdev_queue *txq); | |
991 | ||
992 | static inline void netif_schedule_queue(struct netdev_queue *txq) | |
993 | { | |
994 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) | |
995 | __netif_schedule(txq); | |
996 | } | |
997 | ||
998 | static inline void netif_schedule(struct net_device *dev) | |
999 | { | |
1000 | netif_schedule_queue(netdev_get_tx_queue(dev, 0)); | |
1001 | } | |
1002 | ||
1003 | /** | |
1004 | * netif_start_queue - allow transmit | |
1005 | * @dev: network device | |
1006 | * | |
1007 | * Allow upper layers to call the device hard_start_xmit routine. | |
1008 | */ | |
1009 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) | |
1010 | { | |
1011 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1012 | } | |
1013 | ||
1014 | static inline void netif_start_queue(struct net_device *dev) | |
1015 | { | |
1016 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); | |
1017 | } | |
1018 | ||
1019 | /** | |
1020 | * netif_wake_queue - restart transmit | |
1021 | * @dev: network device | |
1022 | * | |
1023 | * Allow upper layers to call the device hard_start_xmit routine. | |
1024 | * Used for flow control when transmit resources are available. | |
1025 | */ | |
1026 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) | |
1027 | { | |
1028 | #ifdef CONFIG_NETPOLL_TRAP | |
1029 | if (netpoll_trap()) { | |
1030 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1031 | return; | |
1032 | } | |
1033 | #endif | |
1034 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) | |
1035 | __netif_schedule(dev_queue); | |
1036 | } | |
1037 | ||
1038 | static inline void netif_wake_queue(struct net_device *dev) | |
1039 | { | |
1040 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); | |
1041 | } | |
1042 | ||
1043 | /** | |
1044 | * netif_stop_queue - stop transmitted packets | |
1045 | * @dev: network device | |
1046 | * | |
1047 | * Stop upper layers calling the device hard_start_xmit routine. | |
1048 | * Used for flow control when transmit resources are unavailable. | |
1049 | */ | |
1050 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) | |
1051 | { | |
1052 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1053 | } | |
1054 | ||
1055 | static inline void netif_stop_queue(struct net_device *dev) | |
1056 | { | |
1057 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); | |
1058 | } | |
1059 | ||
1060 | /** | |
1061 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1062 | * @dev: network device | |
1063 | * | |
1064 | * Test if transmit queue on device is currently unable to send. | |
1065 | */ | |
1066 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) | |
1067 | { | |
1068 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1069 | } | |
1070 | ||
1071 | static inline int netif_queue_stopped(const struct net_device *dev) | |
1072 | { | |
1073 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); | |
1074 | } | |
1075 | ||
1076 | /** | |
1077 | * netif_running - test if up | |
1078 | * @dev: network device | |
1079 | * | |
1080 | * Test if the device has been brought up. | |
1081 | */ | |
1082 | static inline int netif_running(const struct net_device *dev) | |
1083 | { | |
1084 | return test_bit(__LINK_STATE_START, &dev->state); | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Routines to manage the subqueues on a device. We only need start | |
1089 | * stop, and a check if it's stopped. All other device management is | |
1090 | * done at the overall netdevice level. | |
1091 | * Also test the device if we're multiqueue. | |
1092 | */ | |
1093 | ||
1094 | /** | |
1095 | * netif_start_subqueue - allow sending packets on subqueue | |
1096 | * @dev: network device | |
1097 | * @queue_index: sub queue index | |
1098 | * | |
1099 | * Start individual transmit queue of a device with multiple transmit queues. | |
1100 | */ | |
1101 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) | |
1102 | { | |
1103 | clear_bit(__QUEUE_STATE_XOFF, &dev->egress_subqueue[queue_index].state); | |
1104 | } | |
1105 | ||
1106 | /** | |
1107 | * netif_stop_subqueue - stop sending packets on subqueue | |
1108 | * @dev: network device | |
1109 | * @queue_index: sub queue index | |
1110 | * | |
1111 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1112 | */ | |
1113 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) | |
1114 | { | |
1115 | #ifdef CONFIG_NETPOLL_TRAP | |
1116 | if (netpoll_trap()) | |
1117 | return; | |
1118 | #endif | |
1119 | set_bit(__QUEUE_STATE_XOFF, &dev->egress_subqueue[queue_index].state); | |
1120 | } | |
1121 | ||
1122 | /** | |
1123 | * netif_subqueue_stopped - test status of subqueue | |
1124 | * @dev: network device | |
1125 | * @queue_index: sub queue index | |
1126 | * | |
1127 | * Check individual transmit queue of a device with multiple transmit queues. | |
1128 | */ | |
1129 | static inline int __netif_subqueue_stopped(const struct net_device *dev, | |
1130 | u16 queue_index) | |
1131 | { | |
1132 | return test_bit(__QUEUE_STATE_XOFF, | |
1133 | &dev->egress_subqueue[queue_index].state); | |
1134 | } | |
1135 | ||
1136 | static inline int netif_subqueue_stopped(const struct net_device *dev, | |
1137 | struct sk_buff *skb) | |
1138 | { | |
1139 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1140 | } | |
1141 | ||
1142 | /** | |
1143 | * netif_wake_subqueue - allow sending packets on subqueue | |
1144 | * @dev: network device | |
1145 | * @queue_index: sub queue index | |
1146 | * | |
1147 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1148 | */ | |
1149 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
1150 | { | |
1151 | #ifdef CONFIG_NETPOLL_TRAP | |
1152 | if (netpoll_trap()) | |
1153 | return; | |
1154 | #endif | |
1155 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, | |
1156 | &dev->egress_subqueue[queue_index].state)) | |
1157 | __netif_schedule(netdev_get_tx_queue(dev, 0)); | |
1158 | } | |
1159 | ||
1160 | /** | |
1161 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1162 | * @dev: network device | |
1163 | * | |
1164 | * Check if device has multiple transmit queues | |
1165 | */ | |
1166 | static inline int netif_is_multiqueue(const struct net_device *dev) | |
1167 | { | |
1168 | return (dev->num_tx_queues > 1); | |
1169 | } | |
1170 | ||
1171 | /* Use this variant when it is known for sure that it | |
1172 | * is executing from hardware interrupt context or with hardware interrupts | |
1173 | * disabled. | |
1174 | */ | |
1175 | extern void dev_kfree_skb_irq(struct sk_buff *skb); | |
1176 | ||
1177 | /* Use this variant in places where it could be invoked | |
1178 | * from either hardware interrupt or other context, with hardware interrupts | |
1179 | * either disabled or enabled. | |
1180 | */ | |
1181 | extern void dev_kfree_skb_any(struct sk_buff *skb); | |
1182 | ||
1183 | #define HAVE_NETIF_RX 1 | |
1184 | extern int netif_rx(struct sk_buff *skb); | |
1185 | extern int netif_rx_ni(struct sk_buff *skb); | |
1186 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1187 | extern int netif_receive_skb(struct sk_buff *skb); | |
1188 | extern void netif_nit_deliver(struct sk_buff *skb); | |
1189 | extern int dev_valid_name(const char *name); | |
1190 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
1191 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1192 | extern unsigned dev_get_flags(const struct net_device *); | |
1193 | extern int dev_change_flags(struct net_device *, unsigned); | |
1194 | extern int dev_change_name(struct net_device *, char *); | |
1195 | extern int dev_change_net_namespace(struct net_device *, | |
1196 | struct net *, const char *); | |
1197 | extern int dev_set_mtu(struct net_device *, int); | |
1198 | extern int dev_set_mac_address(struct net_device *, | |
1199 | struct sockaddr *); | |
1200 | extern int dev_hard_start_xmit(struct sk_buff *skb, | |
1201 | struct net_device *dev); | |
1202 | ||
1203 | extern int netdev_budget; | |
1204 | ||
1205 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1206 | extern void netdev_run_todo(void); | |
1207 | ||
1208 | /** | |
1209 | * dev_put - release reference to device | |
1210 | * @dev: network device | |
1211 | * | |
1212 | * Release reference to device to allow it to be freed. | |
1213 | */ | |
1214 | static inline void dev_put(struct net_device *dev) | |
1215 | { | |
1216 | atomic_dec(&dev->refcnt); | |
1217 | } | |
1218 | ||
1219 | /** | |
1220 | * dev_hold - get reference to device | |
1221 | * @dev: network device | |
1222 | * | |
1223 | * Hold reference to device to keep it from being freed. | |
1224 | */ | |
1225 | static inline void dev_hold(struct net_device *dev) | |
1226 | { | |
1227 | atomic_inc(&dev->refcnt); | |
1228 | } | |
1229 | ||
1230 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1231 | * and _off may be called from IRQ context, but it is caller | |
1232 | * who is responsible for serialization of these calls. | |
1233 | * | |
1234 | * The name carrier is inappropriate, these functions should really be | |
1235 | * called netif_lowerlayer_*() because they represent the state of any | |
1236 | * kind of lower layer not just hardware media. | |
1237 | */ | |
1238 | ||
1239 | extern void linkwatch_fire_event(struct net_device *dev); | |
1240 | ||
1241 | /** | |
1242 | * netif_carrier_ok - test if carrier present | |
1243 | * @dev: network device | |
1244 | * | |
1245 | * Check if carrier is present on device | |
1246 | */ | |
1247 | static inline int netif_carrier_ok(const struct net_device *dev) | |
1248 | { | |
1249 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1250 | } | |
1251 | ||
1252 | extern void __netdev_watchdog_up(struct net_device *dev); | |
1253 | ||
1254 | extern void netif_carrier_on(struct net_device *dev); | |
1255 | ||
1256 | extern void netif_carrier_off(struct net_device *dev); | |
1257 | ||
1258 | /** | |
1259 | * netif_dormant_on - mark device as dormant. | |
1260 | * @dev: network device | |
1261 | * | |
1262 | * Mark device as dormant (as per RFC2863). | |
1263 | * | |
1264 | * The dormant state indicates that the relevant interface is not | |
1265 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1266 | * in a "pending" state, waiting for some external event. For "on- | |
1267 | * demand" interfaces, this new state identifies the situation where the | |
1268 | * interface is waiting for events to place it in the up state. | |
1269 | * | |
1270 | */ | |
1271 | static inline void netif_dormant_on(struct net_device *dev) | |
1272 | { | |
1273 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1274 | linkwatch_fire_event(dev); | |
1275 | } | |
1276 | ||
1277 | /** | |
1278 | * netif_dormant_off - set device as not dormant. | |
1279 | * @dev: network device | |
1280 | * | |
1281 | * Device is not in dormant state. | |
1282 | */ | |
1283 | static inline void netif_dormant_off(struct net_device *dev) | |
1284 | { | |
1285 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1286 | linkwatch_fire_event(dev); | |
1287 | } | |
1288 | ||
1289 | /** | |
1290 | * netif_dormant - test if carrier present | |
1291 | * @dev: network device | |
1292 | * | |
1293 | * Check if carrier is present on device | |
1294 | */ | |
1295 | static inline int netif_dormant(const struct net_device *dev) | |
1296 | { | |
1297 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1298 | } | |
1299 | ||
1300 | ||
1301 | /** | |
1302 | * netif_oper_up - test if device is operational | |
1303 | * @dev: network device | |
1304 | * | |
1305 | * Check if carrier is operational | |
1306 | */ | |
1307 | static inline int netif_oper_up(const struct net_device *dev) { | |
1308 | return (dev->operstate == IF_OPER_UP || | |
1309 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1310 | } | |
1311 | ||
1312 | /** | |
1313 | * netif_device_present - is device available or removed | |
1314 | * @dev: network device | |
1315 | * | |
1316 | * Check if device has not been removed from system. | |
1317 | */ | |
1318 | static inline int netif_device_present(struct net_device *dev) | |
1319 | { | |
1320 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1321 | } | |
1322 | ||
1323 | extern void netif_device_detach(struct net_device *dev); | |
1324 | ||
1325 | extern void netif_device_attach(struct net_device *dev); | |
1326 | ||
1327 | /* | |
1328 | * Network interface message level settings | |
1329 | */ | |
1330 | #define HAVE_NETIF_MSG 1 | |
1331 | ||
1332 | enum { | |
1333 | NETIF_MSG_DRV = 0x0001, | |
1334 | NETIF_MSG_PROBE = 0x0002, | |
1335 | NETIF_MSG_LINK = 0x0004, | |
1336 | NETIF_MSG_TIMER = 0x0008, | |
1337 | NETIF_MSG_IFDOWN = 0x0010, | |
1338 | NETIF_MSG_IFUP = 0x0020, | |
1339 | NETIF_MSG_RX_ERR = 0x0040, | |
1340 | NETIF_MSG_TX_ERR = 0x0080, | |
1341 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1342 | NETIF_MSG_INTR = 0x0200, | |
1343 | NETIF_MSG_TX_DONE = 0x0400, | |
1344 | NETIF_MSG_RX_STATUS = 0x0800, | |
1345 | NETIF_MSG_PKTDATA = 0x1000, | |
1346 | NETIF_MSG_HW = 0x2000, | |
1347 | NETIF_MSG_WOL = 0x4000, | |
1348 | }; | |
1349 | ||
1350 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1351 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1352 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1353 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1354 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1355 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1356 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1357 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1358 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1359 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1360 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1361 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1362 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1363 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1364 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1365 | ||
1366 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1367 | { | |
1368 | /* use default */ | |
1369 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1370 | return default_msg_enable_bits; | |
1371 | if (debug_value == 0) /* no output */ | |
1372 | return 0; | |
1373 | /* set low N bits */ | |
1374 | return (1 << debug_value) - 1; | |
1375 | } | |
1376 | ||
1377 | /* Test if receive needs to be scheduled but only if up */ | |
1378 | static inline int netif_rx_schedule_prep(struct net_device *dev, | |
1379 | struct napi_struct *napi) | |
1380 | { | |
1381 | return napi_schedule_prep(napi); | |
1382 | } | |
1383 | ||
1384 | /* Add interface to tail of rx poll list. This assumes that _prep has | |
1385 | * already been called and returned 1. | |
1386 | */ | |
1387 | static inline void __netif_rx_schedule(struct net_device *dev, | |
1388 | struct napi_struct *napi) | |
1389 | { | |
1390 | __napi_schedule(napi); | |
1391 | } | |
1392 | ||
1393 | /* Try to reschedule poll. Called by irq handler. */ | |
1394 | ||
1395 | static inline void netif_rx_schedule(struct net_device *dev, | |
1396 | struct napi_struct *napi) | |
1397 | { | |
1398 | if (netif_rx_schedule_prep(dev, napi)) | |
1399 | __netif_rx_schedule(dev, napi); | |
1400 | } | |
1401 | ||
1402 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ | |
1403 | static inline int netif_rx_reschedule(struct net_device *dev, | |
1404 | struct napi_struct *napi) | |
1405 | { | |
1406 | if (napi_schedule_prep(napi)) { | |
1407 | __netif_rx_schedule(dev, napi); | |
1408 | return 1; | |
1409 | } | |
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | /* same as netif_rx_complete, except that local_irq_save(flags) | |
1414 | * has already been issued | |
1415 | */ | |
1416 | static inline void __netif_rx_complete(struct net_device *dev, | |
1417 | struct napi_struct *napi) | |
1418 | { | |
1419 | __napi_complete(napi); | |
1420 | } | |
1421 | ||
1422 | /* Remove interface from poll list: it must be in the poll list | |
1423 | * on current cpu. This primitive is called by dev->poll(), when | |
1424 | * it completes the work. The device cannot be out of poll list at this | |
1425 | * moment, it is BUG(). | |
1426 | */ | |
1427 | static inline void netif_rx_complete(struct net_device *dev, | |
1428 | struct napi_struct *napi) | |
1429 | { | |
1430 | unsigned long flags; | |
1431 | ||
1432 | local_irq_save(flags); | |
1433 | __netif_rx_complete(dev, napi); | |
1434 | local_irq_restore(flags); | |
1435 | } | |
1436 | ||
1437 | /** | |
1438 | * netif_tx_lock - grab network device transmit lock | |
1439 | * @dev: network device | |
1440 | * @cpu: cpu number of lock owner | |
1441 | * | |
1442 | * Get network device transmit lock | |
1443 | */ | |
1444 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) | |
1445 | { | |
1446 | spin_lock(&txq->_xmit_lock); | |
1447 | txq->xmit_lock_owner = cpu; | |
1448 | } | |
1449 | ||
1450 | static inline void netif_tx_lock(struct net_device *dev) | |
1451 | { | |
1452 | int cpu = smp_processor_id(); | |
1453 | unsigned int i; | |
1454 | ||
1455 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1456 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1457 | __netif_tx_lock(txq, cpu); | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1462 | { | |
1463 | local_bh_disable(); | |
1464 | netif_tx_lock(dev); | |
1465 | } | |
1466 | ||
1467 | static inline int __netif_tx_trylock(struct netdev_queue *txq) | |
1468 | { | |
1469 | int ok = spin_trylock(&txq->_xmit_lock); | |
1470 | if (likely(ok)) | |
1471 | txq->xmit_lock_owner = smp_processor_id(); | |
1472 | return ok; | |
1473 | } | |
1474 | ||
1475 | static inline int netif_tx_trylock(struct net_device *dev) | |
1476 | { | |
1477 | return __netif_tx_trylock(netdev_get_tx_queue(dev, 0)); | |
1478 | } | |
1479 | ||
1480 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
1481 | { | |
1482 | txq->xmit_lock_owner = -1; | |
1483 | spin_unlock(&txq->_xmit_lock); | |
1484 | } | |
1485 | ||
1486 | static inline void netif_tx_unlock(struct net_device *dev) | |
1487 | { | |
1488 | unsigned int i; | |
1489 | ||
1490 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1491 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1492 | __netif_tx_unlock(txq); | |
1493 | } | |
1494 | ||
1495 | } | |
1496 | ||
1497 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
1498 | { | |
1499 | netif_tx_unlock(dev); | |
1500 | local_bh_enable(); | |
1501 | } | |
1502 | ||
1503 | #define HARD_TX_LOCK(dev, txq, cpu) { \ | |
1504 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
1505 | __netif_tx_lock(txq, cpu); \ | |
1506 | } \ | |
1507 | } | |
1508 | ||
1509 | #define HARD_TX_UNLOCK(dev, txq) { \ | |
1510 | if ((dev->features & NETIF_F_LLTX) == 0) { \ | |
1511 | __netif_tx_unlock(txq); \ | |
1512 | } \ | |
1513 | } | |
1514 | ||
1515 | static inline void netif_tx_disable(struct net_device *dev) | |
1516 | { | |
1517 | netif_tx_lock_bh(dev); | |
1518 | netif_stop_queue(dev); | |
1519 | netif_tx_unlock_bh(dev); | |
1520 | } | |
1521 | ||
1522 | static inline void netif_addr_lock(struct net_device *dev) | |
1523 | { | |
1524 | spin_lock(&dev->addr_list_lock); | |
1525 | } | |
1526 | ||
1527 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
1528 | { | |
1529 | spin_lock_bh(&dev->addr_list_lock); | |
1530 | } | |
1531 | ||
1532 | static inline void netif_addr_unlock(struct net_device *dev) | |
1533 | { | |
1534 | spin_unlock(&dev->addr_list_lock); | |
1535 | } | |
1536 | ||
1537 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
1538 | { | |
1539 | spin_unlock_bh(&dev->addr_list_lock); | |
1540 | } | |
1541 | ||
1542 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ | |
1543 | ||
1544 | extern void ether_setup(struct net_device *dev); | |
1545 | ||
1546 | /* Support for loadable net-drivers */ | |
1547 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, | |
1548 | void (*setup)(struct net_device *), | |
1549 | unsigned int queue_count); | |
1550 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
1551 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1552 | extern int register_netdev(struct net_device *dev); | |
1553 | extern void unregister_netdev(struct net_device *dev); | |
1554 | /* Functions used for secondary unicast and multicast support */ | |
1555 | extern void dev_set_rx_mode(struct net_device *dev); | |
1556 | extern void __dev_set_rx_mode(struct net_device *dev); | |
1557 | extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); | |
1558 | extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); | |
1559 | extern int dev_unicast_sync(struct net_device *to, struct net_device *from); | |
1560 | extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); | |
1561 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); | |
1562 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); | |
1563 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
1564 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
1565 | extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); | |
1566 | extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); | |
1567 | extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); | |
1568 | extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); | |
1569 | extern int dev_set_promiscuity(struct net_device *dev, int inc); | |
1570 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1571 | extern void netdev_state_change(struct net_device *dev); | |
1572 | extern void netdev_bonding_change(struct net_device *dev); | |
1573 | extern void netdev_features_change(struct net_device *dev); | |
1574 | /* Load a device via the kmod */ | |
1575 | extern void dev_load(struct net *net, const char *name); | |
1576 | extern void dev_mcast_init(void); | |
1577 | extern int netdev_max_backlog; | |
1578 | extern int weight_p; | |
1579 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
1580 | extern int skb_checksum_help(struct sk_buff *skb); | |
1581 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); | |
1582 | #ifdef CONFIG_BUG | |
1583 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
1584 | #else | |
1585 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
1586 | { | |
1587 | } | |
1588 | #endif | |
1589 | /* rx skb timestamps */ | |
1590 | extern void net_enable_timestamp(void); | |
1591 | extern void net_disable_timestamp(void); | |
1592 | ||
1593 | #ifdef CONFIG_PROC_FS | |
1594 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
1595 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
1596 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
1597 | #endif | |
1598 | ||
1599 | extern int netdev_class_create_file(struct class_attribute *class_attr); | |
1600 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
1601 | ||
1602 | extern void linkwatch_run_queue(void); | |
1603 | ||
1604 | extern int netdev_compute_features(unsigned long all, unsigned long one); | |
1605 | ||
1606 | static inline int net_gso_ok(int features, int gso_type) | |
1607 | { | |
1608 | int feature = gso_type << NETIF_F_GSO_SHIFT; | |
1609 | return (features & feature) == feature; | |
1610 | } | |
1611 | ||
1612 | static inline int skb_gso_ok(struct sk_buff *skb, int features) | |
1613 | { | |
1614 | return net_gso_ok(features, skb_shinfo(skb)->gso_type); | |
1615 | } | |
1616 | ||
1617 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) | |
1618 | { | |
1619 | return skb_is_gso(skb) && | |
1620 | (!skb_gso_ok(skb, dev->features) || | |
1621 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); | |
1622 | } | |
1623 | ||
1624 | static inline void netif_set_gso_max_size(struct net_device *dev, | |
1625 | unsigned int size) | |
1626 | { | |
1627 | dev->gso_max_size = size; | |
1628 | } | |
1629 | ||
1630 | /* On bonding slaves other than the currently active slave, suppress | |
1631 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and | |
1632 | * ARP on active-backup slaves with arp_validate enabled. | |
1633 | */ | |
1634 | static inline int skb_bond_should_drop(struct sk_buff *skb) | |
1635 | { | |
1636 | struct net_device *dev = skb->dev; | |
1637 | struct net_device *master = dev->master; | |
1638 | ||
1639 | if (master && | |
1640 | (dev->priv_flags & IFF_SLAVE_INACTIVE)) { | |
1641 | if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && | |
1642 | skb->protocol == __constant_htons(ETH_P_ARP)) | |
1643 | return 0; | |
1644 | ||
1645 | if (master->priv_flags & IFF_MASTER_ALB) { | |
1646 | if (skb->pkt_type != PACKET_BROADCAST && | |
1647 | skb->pkt_type != PACKET_MULTICAST) | |
1648 | return 0; | |
1649 | } | |
1650 | if (master->priv_flags & IFF_MASTER_8023AD && | |
1651 | skb->protocol == __constant_htons(ETH_P_SLOW)) | |
1652 | return 0; | |
1653 | ||
1654 | return 1; | |
1655 | } | |
1656 | return 0; | |
1657 | } | |
1658 | ||
1659 | #endif /* __KERNEL__ */ | |
1660 | ||
1661 | #endif /* _LINUX_DEV_H */ |