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1da177e4 LT |
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 | * | |
02c30a84 | 10 | * Authors: Ross Biro |
1da177e4 LT |
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> | |
113aa838 | 14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
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> | |
95c26df8 | 31 | #include <linux/if_link.h> |
1da177e4 LT |
32 | |
33 | #ifdef __KERNEL__ | |
ed77134b | 34 | #include <linux/pm_qos_params.h> |
d7fe0f24 | 35 | #include <linux/timer.h> |
bea3348e | 36 | #include <linux/delay.h> |
cc0be322 | 37 | #include <linux/mm.h> |
1da177e4 LT |
38 | #include <asm/atomic.h> |
39 | #include <asm/cache.h> | |
40 | #include <asm/byteorder.h> | |
41 | ||
1da177e4 LT |
42 | #include <linux/device.h> |
43 | #include <linux/percpu.h> | |
4d5b78c0 | 44 | #include <linux/rculist.h> |
db217334 | 45 | #include <linux/dmaengine.h> |
bea3348e | 46 | #include <linux/workqueue.h> |
1da177e4 | 47 | |
b1b67dd4 | 48 | #include <linux/ethtool.h> |
a050c33f | 49 | #include <net/net_namespace.h> |
cf85d08f | 50 | #include <net/dsa.h> |
7a6b6f51 | 51 | #ifdef CONFIG_DCB |
2f90b865 AD |
52 | #include <net/dcbnl.h> |
53 | #endif | |
a050c33f | 54 | |
1da177e4 | 55 | struct vlan_group; |
115c1d6e | 56 | struct netpoll_info; |
704232c2 JB |
57 | /* 802.11 specific */ |
58 | struct wireless_dev; | |
1da177e4 LT |
59 | /* source back-compat hooks */ |
60 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
61 | ( (netdev)->ethtool_ops = (ops) ) | |
62 | ||
63 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
64 | functions are available. */ | |
65 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
66 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
67 | ||
9a1654ba JP |
68 | /* Backlog congestion levels */ |
69 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
70 | #define NET_RX_DROP 1 /* packet dropped */ | |
71 | ||
572a9d7b PM |
72 | /* |
73 | * Transmit return codes: transmit return codes originate from three different | |
74 | * namespaces: | |
75 | * | |
76 | * - qdisc return codes | |
77 | * - driver transmit return codes | |
78 | * - errno values | |
79 | * | |
80 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
81 | * function. Real network devices commonly used with qdiscs should only return | |
82 | * the driver transmit return codes though - when qdiscs are used, the actual | |
83 | * transmission happens asynchronously, so the value is not propagated to | |
84 | * higher layers. Virtual network devices transmit synchronously, in this case | |
85 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
86 | * others are propagated to higher layers. | |
87 | */ | |
88 | ||
89 | /* qdisc ->enqueue() return codes. */ | |
90 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
91 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
92 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
93 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
94 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 95 | |
b9df3cb8 GR |
96 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
97 | * indicates that the device will soon be dropping packets, or already drops | |
98 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 99 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
100 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
101 | ||
dc1f8bf6 | 102 | /* Driver transmit return codes */ |
9a1654ba | 103 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 104 | |
dc1f8bf6 | 105 | enum netdev_tx { |
572a9d7b | 106 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
107 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
108 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
109 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
110 | }; |
111 | typedef enum netdev_tx netdev_tx_t; | |
112 | ||
9a1654ba JP |
113 | /* |
114 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
115 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
116 | */ | |
117 | static inline bool dev_xmit_complete(int rc) | |
118 | { | |
119 | /* | |
120 | * Positive cases with an skb consumed by a driver: | |
121 | * - successful transmission (rc == NETDEV_TX_OK) | |
122 | * - error while transmitting (rc < 0) | |
123 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
124 | */ | |
125 | if (likely(rc < NET_XMIT_MASK)) | |
126 | return true; | |
127 | ||
128 | return false; | |
129 | } | |
130 | ||
1da177e4 LT |
131 | #endif |
132 | ||
133 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
134 | ||
c88e6f51 | 135 | #ifdef __KERNEL__ |
1da177e4 LT |
136 | /* |
137 | * Compute the worst case header length according to the protocols | |
138 | * used. | |
139 | */ | |
fe2918b0 | 140 | |
caf66e58 | 141 | #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) |
8388e3da DM |
142 | # if defined(CONFIG_MAC80211_MESH) |
143 | # define LL_MAX_HEADER 128 | |
144 | # else | |
145 | # define LL_MAX_HEADER 96 | |
146 | # endif | |
c759a6b4 | 147 | #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) |
8388e3da | 148 | # define LL_MAX_HEADER 48 |
1da177e4 | 149 | #else |
8388e3da | 150 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
151 | #endif |
152 | ||
e81c7359 DM |
153 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ |
154 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
155 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
156 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
1da177e4 LT |
157 | #define MAX_HEADER LL_MAX_HEADER |
158 | #else | |
159 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
160 | #endif | |
161 | ||
162 | /* | |
be1f3c2c BH |
163 | * Old network device statistics. Fields are native words |
164 | * (unsigned long) so they can be read and written atomically. | |
165 | * Each field is padded to 64 bits for compatibility with | |
166 | * rtnl_link_stats64. | |
1da177e4 | 167 | */ |
fe2918b0 | 168 | |
be1f3c2c BH |
169 | #if BITS_PER_LONG == 64 |
170 | #define NET_DEVICE_STATS_DEFINE(name) unsigned long name | |
171 | #elif defined(__LITTLE_ENDIAN) | |
172 | #define NET_DEVICE_STATS_DEFINE(name) unsigned long name, pad_ ## name | |
173 | #else | |
174 | #define NET_DEVICE_STATS_DEFINE(name) unsigned long pad_ ## name, name | |
175 | #endif | |
176 | ||
d94d9fee | 177 | struct net_device_stats { |
be1f3c2c BH |
178 | NET_DEVICE_STATS_DEFINE(rx_packets); |
179 | NET_DEVICE_STATS_DEFINE(tx_packets); | |
180 | NET_DEVICE_STATS_DEFINE(rx_bytes); | |
181 | NET_DEVICE_STATS_DEFINE(tx_bytes); | |
182 | NET_DEVICE_STATS_DEFINE(rx_errors); | |
183 | NET_DEVICE_STATS_DEFINE(tx_errors); | |
184 | NET_DEVICE_STATS_DEFINE(rx_dropped); | |
185 | NET_DEVICE_STATS_DEFINE(tx_dropped); | |
186 | NET_DEVICE_STATS_DEFINE(multicast); | |
187 | NET_DEVICE_STATS_DEFINE(collisions); | |
188 | NET_DEVICE_STATS_DEFINE(rx_length_errors); | |
189 | NET_DEVICE_STATS_DEFINE(rx_over_errors); | |
190 | NET_DEVICE_STATS_DEFINE(rx_crc_errors); | |
191 | NET_DEVICE_STATS_DEFINE(rx_frame_errors); | |
192 | NET_DEVICE_STATS_DEFINE(rx_fifo_errors); | |
193 | NET_DEVICE_STATS_DEFINE(rx_missed_errors); | |
194 | NET_DEVICE_STATS_DEFINE(tx_aborted_errors); | |
195 | NET_DEVICE_STATS_DEFINE(tx_carrier_errors); | |
196 | NET_DEVICE_STATS_DEFINE(tx_fifo_errors); | |
197 | NET_DEVICE_STATS_DEFINE(tx_heartbeat_errors); | |
198 | NET_DEVICE_STATS_DEFINE(tx_window_errors); | |
199 | NET_DEVICE_STATS_DEFINE(rx_compressed); | |
200 | NET_DEVICE_STATS_DEFINE(tx_compressed); | |
1da177e4 LT |
201 | }; |
202 | ||
be1f3c2c BH |
203 | #endif /* __KERNEL__ */ |
204 | ||
1da177e4 LT |
205 | |
206 | /* Media selection options. */ | |
207 | enum { | |
208 | IF_PORT_UNKNOWN = 0, | |
209 | IF_PORT_10BASE2, | |
210 | IF_PORT_10BASET, | |
211 | IF_PORT_AUI, | |
212 | IF_PORT_100BASET, | |
213 | IF_PORT_100BASETX, | |
214 | IF_PORT_100BASEFX | |
215 | }; | |
216 | ||
217 | #ifdef __KERNEL__ | |
218 | ||
219 | #include <linux/cache.h> | |
220 | #include <linux/skbuff.h> | |
221 | ||
222 | struct neighbour; | |
223 | struct neigh_parms; | |
224 | struct sk_buff; | |
225 | ||
f001fde5 JP |
226 | struct netdev_hw_addr { |
227 | struct list_head list; | |
228 | unsigned char addr[MAX_ADDR_LEN]; | |
229 | unsigned char type; | |
ccffad25 JP |
230 | #define NETDEV_HW_ADDR_T_LAN 1 |
231 | #define NETDEV_HW_ADDR_T_SAN 2 | |
232 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
233 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 234 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
ccffad25 JP |
235 | int refcount; |
236 | bool synced; | |
22bedad3 | 237 | bool global_use; |
f001fde5 JP |
238 | struct rcu_head rcu_head; |
239 | }; | |
240 | ||
31278e71 JP |
241 | struct netdev_hw_addr_list { |
242 | struct list_head list; | |
243 | int count; | |
244 | }; | |
245 | ||
22bedad3 JP |
246 | #define netdev_hw_addr_list_count(l) ((l)->count) |
247 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
248 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
249 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 250 | |
22bedad3 JP |
251 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
252 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
253 | #define netdev_for_each_uc_addr(ha, dev) \ | |
254 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 255 | |
22bedad3 JP |
256 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
257 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 258 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 259 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 260 | |
d94d9fee | 261 | struct hh_cache { |
1da177e4 LT |
262 | struct hh_cache *hh_next; /* Next entry */ |
263 | atomic_t hh_refcnt; /* number of users */ | |
f0490980 ED |
264 | /* |
265 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
266 | * cache line on SMP. | |
267 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
268 | * incurring cache line ping pongs. | |
269 | */ | |
270 | __be16 hh_type ____cacheline_aligned_in_smp; | |
271 | /* protocol identifier, f.e ETH_P_IP | |
1da177e4 LT |
272 | * NOTE: For VLANs, this will be the |
273 | * encapuslated type. --BLG | |
274 | */ | |
d5c42c0e | 275 | u16 hh_len; /* length of header */ |
1da177e4 | 276 | int (*hh_output)(struct sk_buff *skb); |
3644f0ce | 277 | seqlock_t hh_lock; |
1da177e4 LT |
278 | |
279 | /* cached hardware header; allow for machine alignment needs. */ | |
280 | #define HH_DATA_MOD 16 | |
281 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 282 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
283 | #define HH_DATA_ALIGN(__len) \ |
284 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
285 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
286 | }; | |
287 | ||
288 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
289 | * Alternative is: | |
290 | * dev->hard_header_len ? (dev->hard_header_len + | |
291 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
292 | * | |
293 | * We could use other alignment values, but we must maintain the | |
294 | * relationship HH alignment <= LL alignment. | |
f5184d26 JB |
295 | * |
296 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device | |
297 | * may need. | |
1da177e4 LT |
298 | */ |
299 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 300 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 301 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 JB |
302 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
303 | #define LL_ALLOCATED_SPACE(dev) \ | |
304 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
1da177e4 | 305 | |
3b04ddde SH |
306 | struct header_ops { |
307 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
308 | unsigned short type, const void *daddr, | |
309 | const void *saddr, unsigned len); | |
310 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
311 | int (*rebuild)(struct sk_buff *skb); | |
312 | #define HAVE_HEADER_CACHE | |
313 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); | |
314 | void (*cache_update)(struct hh_cache *hh, | |
315 | const struct net_device *dev, | |
316 | const unsigned char *haddr); | |
317 | }; | |
318 | ||
1da177e4 LT |
319 | /* These flag bits are private to the generic network queueing |
320 | * layer, they may not be explicitly referenced by any other | |
321 | * code. | |
322 | */ | |
323 | ||
d94d9fee | 324 | enum netdev_state_t { |
1da177e4 LT |
325 | __LINK_STATE_START, |
326 | __LINK_STATE_PRESENT, | |
1da177e4 | 327 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
328 | __LINK_STATE_LINKWATCH_PENDING, |
329 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
330 | }; |
331 | ||
332 | ||
333 | /* | |
334 | * This structure holds at boot time configured netdevice settings. They | |
fe2918b0 | 335 | * are then used in the device probing. |
1da177e4 LT |
336 | */ |
337 | struct netdev_boot_setup { | |
338 | char name[IFNAMSIZ]; | |
339 | struct ifmap map; | |
340 | }; | |
341 | #define NETDEV_BOOT_SETUP_MAX 8 | |
342 | ||
20380731 | 343 | extern int __init netdev_boot_setup(char *str); |
1da177e4 | 344 | |
bea3348e SH |
345 | /* |
346 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
347 | */ | |
348 | struct napi_struct { | |
349 | /* The poll_list must only be managed by the entity which | |
350 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
351 | * whoever atomically sets that bit can add this napi_struct | |
352 | * to the per-cpu poll_list, and whoever clears that bit | |
353 | * can remove from the list right before clearing the bit. | |
354 | */ | |
355 | struct list_head poll_list; | |
356 | ||
357 | unsigned long state; | |
358 | int weight; | |
359 | int (*poll)(struct napi_struct *, int); | |
360 | #ifdef CONFIG_NETPOLL | |
361 | spinlock_t poll_lock; | |
362 | int poll_owner; | |
bea3348e | 363 | #endif |
4ae5544f HX |
364 | |
365 | unsigned int gro_count; | |
366 | ||
5d38a079 | 367 | struct net_device *dev; |
d565b0a1 HX |
368 | struct list_head dev_list; |
369 | struct sk_buff *gro_list; | |
5d38a079 | 370 | struct sk_buff *skb; |
bea3348e SH |
371 | }; |
372 | ||
d94d9fee | 373 | enum { |
bea3348e | 374 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 375 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 376 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
bea3348e SH |
377 | }; |
378 | ||
5b252f0c | 379 | enum gro_result { |
d1c76af9 HX |
380 | GRO_MERGED, |
381 | GRO_MERGED_FREE, | |
382 | GRO_HELD, | |
383 | GRO_NORMAL, | |
384 | GRO_DROP, | |
385 | }; | |
5b252f0c | 386 | typedef enum gro_result gro_result_t; |
d1c76af9 | 387 | |
ab95bfe0 JP |
388 | typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb); |
389 | ||
b3c97528 | 390 | extern void __napi_schedule(struct napi_struct *n); |
bea3348e | 391 | |
a0a46196 DM |
392 | static inline int napi_disable_pending(struct napi_struct *n) |
393 | { | |
394 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
395 | } | |
396 | ||
bea3348e SH |
397 | /** |
398 | * napi_schedule_prep - check if napi can be scheduled | |
399 | * @n: napi context | |
400 | * | |
401 | * Test if NAPI routine is already running, and if not mark | |
402 | * it as running. This is used as a condition variable | |
a0a46196 DM |
403 | * insure only one NAPI poll instance runs. We also make |
404 | * sure there is no pending NAPI disable. | |
bea3348e SH |
405 | */ |
406 | static inline int napi_schedule_prep(struct napi_struct *n) | |
407 | { | |
a0a46196 DM |
408 | return !napi_disable_pending(n) && |
409 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
410 | } |
411 | ||
412 | /** | |
413 | * napi_schedule - schedule NAPI poll | |
414 | * @n: napi context | |
415 | * | |
416 | * Schedule NAPI poll routine to be called if it is not already | |
417 | * running. | |
418 | */ | |
419 | static inline void napi_schedule(struct napi_struct *n) | |
420 | { | |
421 | if (napi_schedule_prep(n)) | |
422 | __napi_schedule(n); | |
423 | } | |
424 | ||
bfe13f54 RD |
425 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
426 | static inline int napi_reschedule(struct napi_struct *napi) | |
427 | { | |
428 | if (napi_schedule_prep(napi)) { | |
429 | __napi_schedule(napi); | |
430 | return 1; | |
431 | } | |
432 | return 0; | |
433 | } | |
434 | ||
bea3348e SH |
435 | /** |
436 | * napi_complete - NAPI processing complete | |
437 | * @n: napi context | |
438 | * | |
439 | * Mark NAPI processing as complete. | |
440 | */ | |
d565b0a1 HX |
441 | extern void __napi_complete(struct napi_struct *n); |
442 | extern void napi_complete(struct napi_struct *n); | |
bea3348e SH |
443 | |
444 | /** | |
445 | * napi_disable - prevent NAPI from scheduling | |
446 | * @n: napi context | |
447 | * | |
448 | * Stop NAPI from being scheduled on this context. | |
449 | * Waits till any outstanding processing completes. | |
450 | */ | |
451 | static inline void napi_disable(struct napi_struct *n) | |
452 | { | |
a0a46196 | 453 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 454 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 455 | msleep(1); |
a0a46196 | 456 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
457 | } |
458 | ||
459 | /** | |
460 | * napi_enable - enable NAPI scheduling | |
461 | * @n: napi context | |
462 | * | |
463 | * Resume NAPI from being scheduled on this context. | |
464 | * Must be paired with napi_disable. | |
465 | */ | |
466 | static inline void napi_enable(struct napi_struct *n) | |
467 | { | |
468 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
469 | smp_mb__before_clear_bit(); | |
470 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
471 | } | |
472 | ||
c264c3de SH |
473 | #ifdef CONFIG_SMP |
474 | /** | |
475 | * napi_synchronize - wait until NAPI is not running | |
476 | * @n: napi context | |
477 | * | |
478 | * Wait until NAPI is done being scheduled on this context. | |
479 | * Waits till any outstanding processing completes but | |
480 | * does not disable future activations. | |
481 | */ | |
482 | static inline void napi_synchronize(const struct napi_struct *n) | |
483 | { | |
484 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
485 | msleep(1); | |
486 | } | |
487 | #else | |
488 | # define napi_synchronize(n) barrier() | |
489 | #endif | |
490 | ||
d94d9fee | 491 | enum netdev_queue_state_t { |
79d16385 | 492 | __QUEUE_STATE_XOFF, |
c3f26a26 | 493 | __QUEUE_STATE_FROZEN, |
79d16385 DM |
494 | }; |
495 | ||
bb949fbd | 496 | struct netdev_queue { |
6a321cb3 ED |
497 | /* |
498 | * read mostly part | |
499 | */ | |
bb949fbd | 500 | struct net_device *dev; |
b0e1e646 | 501 | struct Qdisc *qdisc; |
79d16385 | 502 | unsigned long state; |
b0e1e646 | 503 | struct Qdisc *qdisc_sleeping; |
6a321cb3 ED |
504 | /* |
505 | * write mostly part | |
506 | */ | |
507 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
508 | int xmit_lock_owner; | |
9d21493b ED |
509 | /* |
510 | * please use this field instead of dev->trans_start | |
511 | */ | |
512 | unsigned long trans_start; | |
7004bf25 ED |
513 | unsigned long tx_bytes; |
514 | unsigned long tx_packets; | |
515 | unsigned long tx_dropped; | |
e8a0464c | 516 | } ____cacheline_aligned_in_smp; |
bb949fbd | 517 | |
df334545 | 518 | #ifdef CONFIG_RPS |
0a9627f2 TH |
519 | /* |
520 | * This structure holds an RPS map which can be of variable length. The | |
521 | * map is an array of CPUs. | |
522 | */ | |
523 | struct rps_map { | |
524 | unsigned int len; | |
525 | struct rcu_head rcu; | |
526 | u16 cpus[0]; | |
527 | }; | |
528 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16))) | |
529 | ||
fec5e652 TH |
530 | /* |
531 | * The rps_dev_flow structure contains the mapping of a flow to a CPU and the | |
532 | * tail pointer for that CPU's input queue at the time of last enqueue. | |
533 | */ | |
534 | struct rps_dev_flow { | |
535 | u16 cpu; | |
536 | u16 fill; | |
537 | unsigned int last_qtail; | |
538 | }; | |
539 | ||
540 | /* | |
541 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
542 | */ | |
543 | struct rps_dev_flow_table { | |
544 | unsigned int mask; | |
545 | struct rcu_head rcu; | |
546 | struct work_struct free_work; | |
547 | struct rps_dev_flow flows[0]; | |
548 | }; | |
549 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
550 | (_num * sizeof(struct rps_dev_flow))) | |
551 | ||
552 | /* | |
553 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
554 | * on which they were processed by the application (set in recvmsg). | |
555 | */ | |
556 | struct rps_sock_flow_table { | |
557 | unsigned int mask; | |
558 | u16 ents[0]; | |
559 | }; | |
560 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ | |
561 | (_num * sizeof(u16))) | |
562 | ||
563 | #define RPS_NO_CPU 0xffff | |
564 | ||
565 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, | |
566 | u32 hash) | |
567 | { | |
568 | if (table && hash) { | |
569 | unsigned int cpu, index = hash & table->mask; | |
570 | ||
571 | /* We only give a hint, preemption can change cpu under us */ | |
572 | cpu = raw_smp_processor_id(); | |
573 | ||
574 | if (table->ents[index] != cpu) | |
575 | table->ents[index] = cpu; | |
576 | } | |
577 | } | |
578 | ||
579 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, | |
580 | u32 hash) | |
581 | { | |
582 | if (table && hash) | |
583 | table->ents[hash & table->mask] = RPS_NO_CPU; | |
584 | } | |
585 | ||
586 | extern struct rps_sock_flow_table *rps_sock_flow_table; | |
587 | ||
0a9627f2 TH |
588 | /* This structure contains an instance of an RX queue. */ |
589 | struct netdev_rx_queue { | |
590 | struct rps_map *rps_map; | |
fec5e652 | 591 | struct rps_dev_flow_table *rps_flow_table; |
0a9627f2 TH |
592 | struct kobject kobj; |
593 | struct netdev_rx_queue *first; | |
594 | atomic_t count; | |
595 | } ____cacheline_aligned_in_smp; | |
fec5e652 | 596 | #endif /* CONFIG_RPS */ |
d314774c SH |
597 | |
598 | /* | |
599 | * This structure defines the management hooks for network devices. | |
00829823 SH |
600 | * The following hooks can be defined; unless noted otherwise, they are |
601 | * optional and can be filled with a null pointer. | |
d314774c SH |
602 | * |
603 | * int (*ndo_init)(struct net_device *dev); | |
604 | * This function is called once when network device is registered. | |
605 | * The network device can use this to any late stage initializaton | |
606 | * or semantic validattion. It can fail with an error code which will | |
607 | * be propogated back to register_netdev | |
608 | * | |
609 | * void (*ndo_uninit)(struct net_device *dev); | |
610 | * This function is called when device is unregistered or when registration | |
611 | * fails. It is not called if init fails. | |
612 | * | |
613 | * int (*ndo_open)(struct net_device *dev); | |
614 | * This function is called when network device transistions to the up | |
615 | * state. | |
616 | * | |
617 | * int (*ndo_stop)(struct net_device *dev); | |
618 | * This function is called when network device transistions to the down | |
619 | * state. | |
620 | * | |
dc1f8bf6 SH |
621 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
622 | * struct net_device *dev); | |
00829823 | 623 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
624 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
625 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
626 | * Required can not be NULL. |
627 | * | |
628 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
629 | * Called to decide which queue to when device supports multiple | |
630 | * transmit queues. | |
631 | * | |
d314774c SH |
632 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
633 | * This function is called to allow device receiver to make | |
634 | * changes to configuration when multicast or promiscious is enabled. | |
635 | * | |
636 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
637 | * This function is called device changes address list filtering. | |
638 | * | |
639 | * void (*ndo_set_multicast_list)(struct net_device *dev); | |
640 | * This function is called when the multicast address list changes. | |
641 | * | |
642 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
643 | * This function is called when the Media Access Control address | |
37b607c5 | 644 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
645 | * mac address can not be changed. |
646 | * | |
647 | * int (*ndo_validate_addr)(struct net_device *dev); | |
648 | * Test if Media Access Control address is valid for the device. | |
649 | * | |
650 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
651 | * Called when a user request an ioctl which can't be handled by | |
652 | * the generic interface code. If not defined ioctl's return | |
653 | * not supported error code. | |
654 | * | |
655 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
656 | * Used to set network devices bus interface parameters. This interface | |
657 | * is retained for legacy reason, new devices should use the bus | |
658 | * interface (PCI) for low level management. | |
659 | * | |
660 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
661 | * Called when a user wants to change the Maximum Transfer Unit | |
662 | * of a device. If not defined, any request to change MTU will | |
663 | * will return an error. | |
664 | * | |
00829823 | 665 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
666 | * Callback uses when the transmitter has not made any progress |
667 | * for dev->watchdog ticks. | |
668 | * | |
28172739 ED |
669 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev |
670 | * struct rtnl_link_stats64 *storage); | |
d308e38f | 671 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 672 | * Called when a user wants to get the network device usage |
be1f3c2c BH |
673 | * statistics. Drivers must do one of the following: |
674 | * 1. Define @ndo_get_stats64 to update a rtnl_link_stats64 structure | |
675 | * (which should normally be dev->stats64) and return a ponter to | |
676 | * it. The structure must not be changed asynchronously. | |
82695d9b | 677 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
678 | * (which should normally be dev->stats) and return a pointer to |
679 | * it. The structure may be changed asynchronously only if each | |
680 | * field is written atomically. | |
681 | * 3. Update dev->stats asynchronously and atomically, and define | |
682 | * neither operation. | |
d314774c SH |
683 | * |
684 | * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); | |
685 | * If device support VLAN receive accleration | |
686 | * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called | |
687 | * when vlan groups for the device changes. Note: grp is NULL | |
688 | * if no vlan's groups are being used. | |
689 | * | |
690 | * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); | |
691 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
692 | * this function is called when a VLAN id is registered. | |
693 | * | |
694 | * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); | |
695 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
696 | * this function is called when a VLAN id is unregistered. | |
697 | * | |
698 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
699 | * |
700 | * SR-IOV management functions. | |
701 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
702 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
703 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
704 | * int (*ndo_get_vf_config)(struct net_device *dev, | |
705 | * int vf, struct ifla_vf_info *ivf); | |
57b61080 SF |
706 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
707 | * struct nlattr *port[]); | |
708 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
d314774c | 709 | */ |
47fd5b83 | 710 | #define HAVE_NET_DEVICE_OPS |
d314774c SH |
711 | struct net_device_ops { |
712 | int (*ndo_init)(struct net_device *dev); | |
713 | void (*ndo_uninit)(struct net_device *dev); | |
714 | int (*ndo_open)(struct net_device *dev); | |
715 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 716 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
717 | struct net_device *dev); |
718 | u16 (*ndo_select_queue)(struct net_device *dev, | |
719 | struct sk_buff *skb); | |
d314774c SH |
720 | void (*ndo_change_rx_flags)(struct net_device *dev, |
721 | int flags); | |
d314774c | 722 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c | 723 | void (*ndo_set_multicast_list)(struct net_device *dev); |
d314774c SH |
724 | int (*ndo_set_mac_address)(struct net_device *dev, |
725 | void *addr); | |
d314774c | 726 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
727 | int (*ndo_do_ioctl)(struct net_device *dev, |
728 | struct ifreq *ifr, int cmd); | |
d314774c SH |
729 | int (*ndo_set_config)(struct net_device *dev, |
730 | struct ifmap *map); | |
00829823 SH |
731 | int (*ndo_change_mtu)(struct net_device *dev, |
732 | int new_mtu); | |
733 | int (*ndo_neigh_setup)(struct net_device *dev, | |
734 | struct neigh_parms *); | |
d314774c SH |
735 | void (*ndo_tx_timeout) (struct net_device *dev); |
736 | ||
28172739 ED |
737 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
738 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
739 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
740 | ||
741 | void (*ndo_vlan_rx_register)(struct net_device *dev, | |
742 | struct vlan_group *grp); | |
743 | void (*ndo_vlan_rx_add_vid)(struct net_device *dev, | |
744 | unsigned short vid); | |
745 | void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, | |
746 | unsigned short vid); | |
747 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
d314774c | 748 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 HX |
749 | int (*ndo_netpoll_setup)(struct net_device *dev, |
750 | struct netpoll_info *info); | |
0e34e931 | 751 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
d314774c | 752 | #endif |
95c26df8 WM |
753 | int (*ndo_set_vf_mac)(struct net_device *dev, |
754 | int queue, u8 *mac); | |
755 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
756 | int queue, u16 vlan, u8 qos); | |
757 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
758 | int vf, int rate); | |
759 | int (*ndo_get_vf_config)(struct net_device *dev, | |
760 | int vf, | |
761 | struct ifla_vf_info *ivf); | |
57b61080 SF |
762 | int (*ndo_set_vf_port)(struct net_device *dev, |
763 | int vf, | |
764 | struct nlattr *port[]); | |
765 | int (*ndo_get_vf_port)(struct net_device *dev, | |
766 | int vf, struct sk_buff *skb); | |
4d288d57 | 767 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
cb454399 YZ |
768 | int (*ndo_fcoe_enable)(struct net_device *dev); |
769 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
770 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
771 | u16 xid, | |
772 | struct scatterlist *sgl, | |
773 | unsigned int sgc); | |
774 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
775 | u16 xid); | |
df5c7945 YZ |
776 | #define NETDEV_FCOE_WWNN 0 |
777 | #define NETDEV_FCOE_WWPN 1 | |
778 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
779 | u64 *wwn, int type); | |
4d288d57 | 780 | #endif |
d314774c SH |
781 | }; |
782 | ||
1da177e4 LT |
783 | /* |
784 | * The DEVICE structure. | |
785 | * Actually, this whole structure is a big mistake. It mixes I/O | |
786 | * data with strictly "high-level" data, and it has to know about | |
787 | * almost every data structure used in the INET module. | |
788 | * | |
789 | * FIXME: cleanup struct net_device such that network protocol info | |
790 | * moves out. | |
791 | */ | |
792 | ||
d94d9fee | 793 | struct net_device { |
1da177e4 LT |
794 | |
795 | /* | |
796 | * This is the first field of the "visible" part of this structure | |
797 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
798 | * the interface. | |
799 | */ | |
800 | char name[IFNAMSIZ]; | |
ed77134b MG |
801 | |
802 | struct pm_qos_request_list *pm_qos_req; | |
803 | ||
9356b8fc ED |
804 | /* device name hash chain */ |
805 | struct hlist_node name_hlist; | |
0b815a1a SH |
806 | /* snmp alias */ |
807 | char *ifalias; | |
1da177e4 LT |
808 | |
809 | /* | |
810 | * I/O specific fields | |
811 | * FIXME: Merge these and struct ifmap into one | |
812 | */ | |
813 | unsigned long mem_end; /* shared mem end */ | |
814 | unsigned long mem_start; /* shared mem start */ | |
815 | unsigned long base_addr; /* device I/O address */ | |
816 | unsigned int irq; /* device IRQ number */ | |
817 | ||
818 | /* | |
819 | * Some hardware also needs these fields, but they are not | |
820 | * part of the usual set specified in Space.c. | |
821 | */ | |
822 | ||
823 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
824 | unsigned char dma; /* DMA channel */ | |
825 | ||
826 | unsigned long state; | |
827 | ||
7562f876 | 828 | struct list_head dev_list; |
bea3348e | 829 | struct list_head napi_list; |
44a0873d | 830 | struct list_head unreg_list; |
1da177e4 | 831 | |
9356b8fc ED |
832 | /* Net device features */ |
833 | unsigned long features; | |
834 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
d212f87b | 835 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ |
9356b8fc ED |
836 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
837 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
d212f87b | 838 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ |
9356b8fc ED |
839 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
840 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
841 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
842 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
843 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
844 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
37c3185a | 845 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ |
e24eb521 CB |
846 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ |
847 | /* do not use LLTX in new drivers */ | |
ce286d32 | 848 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ |
d565b0a1 | 849 | #define NETIF_F_GRO 16384 /* Generic receive offload */ |
3ae7c0b2 | 850 | #define NETIF_F_LRO 32768 /* large receive offload */ |
7967168c | 851 | |
8dc92f7e | 852 | /* the GSO_MASK reserves bits 16 through 23 */ |
01d5b2fc | 853 | #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ |
8dc92f7e | 854 | #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ |
bb2af4f5 | 855 | #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ |
15682bc4 | 856 | #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ |
b00fabb4 | 857 | #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ |
01d5b2fc | 858 | |
7967168c | 859 | /* Segmentation offload features */ |
289c79a4 | 860 | #define NETIF_F_GSO_SHIFT 16 |
43eb99c5 | 861 | #define NETIF_F_GSO_MASK 0x00ff0000 |
7967168c | 862 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
f83ef8c0 | 863 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) |
576a30eb | 864 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) |
f83ef8c0 HX |
865 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) |
866 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
01d5b2fc | 867 | #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) |
9356b8fc | 868 | |
78eb8877 | 869 | /* List of features with software fallbacks. */ |
d29c0c5c HX |
870 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \ |
871 | NETIF_F_TSO6 | NETIF_F_UFO) | |
78eb8877 | 872 | |
d212f87b | 873 | |
8648b305 | 874 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
d212f87b SH |
875 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) |
876 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
877 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
8648b305 | 878 | |
b63365a2 HX |
879 | /* |
880 | * If one device supports one of these features, then enable them | |
881 | * for all in netdev_increment_features. | |
882 | */ | |
883 | #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ | |
d314774c | 884 | NETIF_F_SG | NETIF_F_HIGHDMA | \ |
b63365a2 HX |
885 | NETIF_F_FRAGLIST) |
886 | ||
1da177e4 LT |
887 | /* Interface index. Unique device identifier */ |
888 | int ifindex; | |
889 | int iflink; | |
890 | ||
be1f3c2c BH |
891 | union { |
892 | struct rtnl_link_stats64 stats64; | |
893 | struct net_device_stats stats; | |
894 | }; | |
1da177e4 | 895 | |
b86e0280 | 896 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
897 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
898 | * See <net/iw_handler.h> for details. Jean II */ | |
899 | const struct iw_handler_def * wireless_handlers; | |
900 | /* Instance data managed by the core of Wireless Extensions. */ | |
901 | struct iw_public_data * wireless_data; | |
b86e0280 | 902 | #endif |
d314774c SH |
903 | /* Management operations */ |
904 | const struct net_device_ops *netdev_ops; | |
76fd8593 | 905 | const struct ethtool_ops *ethtool_ops; |
1da177e4 | 906 | |
3b04ddde SH |
907 | /* Hardware header description */ |
908 | const struct header_ops *header_ops; | |
909 | ||
b00055aa | 910 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
911 | unsigned short gflags; |
912 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
913 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
914 | ||
b00055aa SR |
915 | unsigned char operstate; /* RFC2863 operstate */ |
916 | unsigned char link_mode; /* mapping policy to operstate */ | |
917 | ||
cd7b5396 | 918 | unsigned int mtu; /* interface MTU value */ |
1da177e4 LT |
919 | unsigned short type; /* interface hardware type */ |
920 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 921 | |
f5184d26 JB |
922 | /* extra head- and tailroom the hardware may need, but not in all cases |
923 | * can this be guaranteed, especially tailroom. Some cases also use | |
924 | * LL_MAX_HEADER instead to allocate the skb. | |
925 | */ | |
926 | unsigned short needed_headroom; | |
927 | unsigned short needed_tailroom; | |
928 | ||
1da177e4 LT |
929 | struct net_device *master; /* Pointer to master device of a group, |
930 | * which this device is member of. | |
931 | */ | |
932 | ||
933 | /* Interface address info. */ | |
a6f9a705 | 934 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
935 | unsigned char addr_len; /* hardware address length */ |
936 | unsigned short dev_id; /* for shared network cards */ | |
937 | ||
ccffad25 | 938 | spinlock_t addr_list_lock; |
22bedad3 JP |
939 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
940 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
941 | int uc_promisc; | |
9d45abe1 WC |
942 | unsigned int promiscuity; |
943 | unsigned int allmulti; | |
1da177e4 | 944 | |
1da177e4 LT |
945 | |
946 | /* Protocol specific pointers */ | |
947 | ||
91da11f8 LB |
948 | #ifdef CONFIG_NET_DSA |
949 | void *dsa_ptr; /* dsa specific data */ | |
950 | #endif | |
1da177e4 | 951 | void *atalk_ptr; /* AppleTalk link */ |
fe2918b0 | 952 | void *ip_ptr; /* IPv4 specific data */ |
1da177e4 LT |
953 | void *dn_ptr; /* DECnet specific data */ |
954 | void *ip6_ptr; /* IPv6 specific data */ | |
955 | void *ec_ptr; /* Econet specific data */ | |
956 | void *ax25_ptr; /* AX.25 specific data */ | |
704232c2 JB |
957 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
958 | assign before registering */ | |
1da177e4 | 959 | |
9356b8fc ED |
960 | /* |
961 | * Cache line mostly used on receive path (including eth_type_trans()) | |
962 | */ | |
9356b8fc ED |
963 | unsigned long last_rx; /* Time of last Rx */ |
964 | /* Interface address info used in eth_type_trans() */ | |
f001fde5 JP |
965 | unsigned char *dev_addr; /* hw address, (before bcast |
966 | because most packets are | |
967 | unicast) */ | |
968 | ||
31278e71 JP |
969 | struct netdev_hw_addr_list dev_addrs; /* list of device |
970 | hw addresses */ | |
9356b8fc ED |
971 | |
972 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 973 | |
df334545 | 974 | #ifdef CONFIG_RPS |
0a9627f2 TH |
975 | struct kset *queues_kset; |
976 | ||
977 | struct netdev_rx_queue *_rx; | |
978 | ||
979 | /* Number of RX queues allocated at alloc_netdev_mq() time */ | |
980 | unsigned int num_rx_queues; | |
df334545 | 981 | #endif |
0a9627f2 | 982 | |
bb949fbd | 983 | struct netdev_queue rx_queue; |
ab95bfe0 | 984 | rx_handler_func_t *rx_handler; |
93e2c32b | 985 | void *rx_handler_data; |
e8a0464c DM |
986 | |
987 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; | |
fd2ea0a7 DM |
988 | |
989 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
e8a0464c | 990 | unsigned int num_tx_queues; |
fd2ea0a7 DM |
991 | |
992 | /* Number of TX queues currently active in device */ | |
993 | unsigned int real_num_tx_queues; | |
994 | ||
af356afa PM |
995 | /* root qdisc from userspace point of view */ |
996 | struct Qdisc *qdisc; | |
997 | ||
1da177e4 | 998 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
c3f26a26 | 999 | spinlock_t tx_global_lock; |
9356b8fc ED |
1000 | /* |
1001 | * One part is mostly used on xmit path (device) | |
1002 | */ | |
9356b8fc | 1003 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
1004 | |
1005 | /* | |
1006 | * trans_start here is expensive for high speed devices on SMP, | |
1007 | * please use netdev_queue->trans_start instead. | |
1008 | */ | |
9356b8fc ED |
1009 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
1010 | ||
1011 | int watchdog_timeo; /* used by dev_watchdog() */ | |
1012 | struct timer_list watchdog_timer; | |
1013 | ||
1da177e4 | 1014 | /* Number of references to this device */ |
9356b8fc ED |
1015 | atomic_t refcnt ____cacheline_aligned_in_smp; |
1016 | ||
1da177e4 LT |
1017 | /* delayed register/unregister */ |
1018 | struct list_head todo_list; | |
1da177e4 LT |
1019 | /* device index hash chain */ |
1020 | struct hlist_node index_hlist; | |
1021 | ||
e014debe | 1022 | struct list_head link_watch_list; |
572a103d | 1023 | |
1da177e4 LT |
1024 | /* register/unregister state machine */ |
1025 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 1026 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1027 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1028 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1029 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1030 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
a2835763 PM |
1031 | } reg_state:16; |
1032 | ||
1033 | enum { | |
1034 | RTNL_LINK_INITIALIZED, | |
1035 | RTNL_LINK_INITIALIZING, | |
1036 | } rtnl_link_state:16; | |
1da177e4 | 1037 | |
d314774c SH |
1038 | /* Called from unregister, can be used to call free_netdev */ |
1039 | void (*destructor)(struct net_device *dev); | |
1da177e4 | 1040 | |
1da177e4 | 1041 | #ifdef CONFIG_NETPOLL |
115c1d6e | 1042 | struct netpoll_info *npinfo; |
1da177e4 | 1043 | #endif |
eae792b7 | 1044 | |
c346dca1 | 1045 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
1046 | /* Network namespace this network device is inside */ |
1047 | struct net *nd_net; | |
c346dca1 | 1048 | #endif |
4a1c5371 | 1049 | |
4951704b DM |
1050 | /* mid-layer private */ |
1051 | void *ml_priv; | |
1052 | ||
eca9ebac PM |
1053 | /* GARP */ |
1054 | struct garp_port *garp_port; | |
1da177e4 | 1055 | |
1da177e4 | 1056 | /* class/net/name entry */ |
43cb76d9 | 1057 | struct device dev; |
0c509a6c EB |
1058 | /* space for optional device, statistics, and wireless sysfs groups */ |
1059 | const struct attribute_group *sysfs_groups[4]; | |
38f7b870 PM |
1060 | |
1061 | /* rtnetlink link ops */ | |
1062 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 1063 | |
289c79a4 PM |
1064 | /* VLAN feature mask */ |
1065 | unsigned long vlan_features; | |
1066 | ||
82cc1a7a PWJ |
1067 | /* for setting kernel sock attribute on TCP connection setup */ |
1068 | #define GSO_MAX_SIZE 65536 | |
1069 | unsigned int gso_max_size; | |
d314774c | 1070 | |
7a6b6f51 | 1071 | #ifdef CONFIG_DCB |
2f90b865 | 1072 | /* Data Center Bridging netlink ops */ |
32953543 | 1073 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 AD |
1074 | #endif |
1075 | ||
4d288d57 YZ |
1076 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
1077 | /* max exchange id for FCoE LRO by ddp */ | |
1078 | unsigned int fcoe_ddp_xid; | |
1079 | #endif | |
15682bc4 PWJ |
1080 | /* n-tuple filter list attached to this device */ |
1081 | struct ethtool_rx_ntuple_list ethtool_ntuple_list; | |
1da177e4 | 1082 | }; |
43cb76d9 | 1083 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1084 | |
1085 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1086 | |
e8a0464c DM |
1087 | static inline |
1088 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1089 | unsigned int index) | |
1090 | { | |
1091 | return &dev->_tx[index]; | |
1092 | } | |
1093 | ||
1094 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1095 | void (*f)(struct net_device *, | |
1096 | struct netdev_queue *, | |
1097 | void *), | |
1098 | void *arg) | |
1099 | { | |
1100 | unsigned int i; | |
1101 | ||
1102 | for (i = 0; i < dev->num_tx_queues; i++) | |
1103 | f(dev, &dev->_tx[i], arg); | |
1104 | } | |
1105 | ||
c346dca1 YH |
1106 | /* |
1107 | * Net namespace inlines | |
1108 | */ | |
1109 | static inline | |
1110 | struct net *dev_net(const struct net_device *dev) | |
1111 | { | |
c2d9ba9b | 1112 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1113 | } |
1114 | ||
1115 | static inline | |
f5aa23fd | 1116 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
1117 | { |
1118 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
1119 | release_net(dev->nd_net); |
1120 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
1121 | #endif |
1122 | } | |
1123 | ||
cf85d08f LB |
1124 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1125 | { | |
1126 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1127 | if (dev->dsa_ptr != NULL) | |
1128 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1129 | #endif | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
8a83a00b AB |
1134 | #ifndef CONFIG_NET_NS |
1135 | static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) | |
1136 | { | |
1137 | skb->dev = dev; | |
1138 | } | |
1139 | #else /* CONFIG_NET_NS */ | |
1140 | void skb_set_dev(struct sk_buff *skb, struct net_device *dev); | |
1141 | #endif | |
1142 | ||
396138f0 LB |
1143 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1144 | { | |
1145 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1146 | if (dev->dsa_ptr != NULL) | |
1147 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1148 | #endif | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
bea3348e SH |
1153 | /** |
1154 | * netdev_priv - access network device private data | |
1155 | * @dev: network device | |
1156 | * | |
1157 | * Get network device private data | |
1158 | */ | |
6472ce60 | 1159 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1160 | { |
1ce8e7b5 | 1161 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1162 | } |
1163 | ||
1da177e4 LT |
1164 | /* Set the sysfs physical device reference for the network logical device |
1165 | * if set prior to registration will cause a symlink during initialization. | |
1166 | */ | |
43cb76d9 | 1167 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1168 | |
384912ed MH |
1169 | /* Set the sysfs device type for the network logical device to allow |
1170 | * fin grained indentification of different network device types. For | |
1171 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. | |
1172 | */ | |
1173 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1174 | ||
3b582cc1 SH |
1175 | /** |
1176 | * netif_napi_add - initialize a napi context | |
1177 | * @dev: network device | |
1178 | * @napi: napi context | |
1179 | * @poll: polling function | |
1180 | * @weight: default weight | |
1181 | * | |
1182 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1183 | * *any* of the other napi related functions. | |
1184 | */ | |
d565b0a1 HX |
1185 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1186 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1187 | |
d8156534 AD |
1188 | /** |
1189 | * netif_napi_del - remove a napi context | |
1190 | * @napi: napi context | |
1191 | * | |
1192 | * netif_napi_del() removes a napi context from the network device napi list | |
1193 | */ | |
d565b0a1 HX |
1194 | void netif_napi_del(struct napi_struct *napi); |
1195 | ||
1196 | struct napi_gro_cb { | |
78a478d0 HX |
1197 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1198 | void *frag0; | |
1199 | ||
7489594c HX |
1200 | /* Length of frag0. */ |
1201 | unsigned int frag0_len; | |
1202 | ||
86911732 HX |
1203 | /* This indicates where we are processing relative to skb->data. */ |
1204 | int data_offset; | |
1205 | ||
d565b0a1 HX |
1206 | /* This is non-zero if the packet may be of the same flow. */ |
1207 | int same_flow; | |
1208 | ||
1209 | /* This is non-zero if the packet cannot be merged with the new skb. */ | |
1210 | int flush; | |
1211 | ||
1212 | /* Number of segments aggregated. */ | |
1213 | int count; | |
5d38a079 HX |
1214 | |
1215 | /* Free the skb? */ | |
1216 | int free; | |
d565b0a1 HX |
1217 | }; |
1218 | ||
1219 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1220 | |
1da177e4 | 1221 | struct packet_type { |
f2ccd8fa DM |
1222 | __be16 type; /* This is really htons(ether_type). */ |
1223 | struct net_device *dev; /* NULL is wildcarded here */ | |
1224 | int (*func) (struct sk_buff *, | |
1225 | struct net_device *, | |
1226 | struct packet_type *, | |
1227 | struct net_device *); | |
576a30eb HX |
1228 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
1229 | int features); | |
a430a43d | 1230 | int (*gso_send_check)(struct sk_buff *skb); |
d565b0a1 HX |
1231 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1232 | struct sk_buff *skb); | |
1233 | int (*gro_complete)(struct sk_buff *skb); | |
1da177e4 LT |
1234 | void *af_packet_priv; |
1235 | struct list_head list; | |
1236 | }; | |
1237 | ||
1238 | #include <linux/interrupt.h> | |
1239 | #include <linux/notifier.h> | |
1240 | ||
1da177e4 LT |
1241 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1242 | ||
7562f876 | 1243 | |
881d966b EB |
1244 | #define for_each_netdev(net, d) \ |
1245 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
1246 | #define for_each_netdev_reverse(net, d) \ |
1247 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
1248 | #define for_each_netdev_rcu(net, d) \ |
1249 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
1250 | #define for_each_netdev_safe(net, d, n) \ |
1251 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1252 | #define for_each_netdev_continue(net, d) \ | |
1253 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 1254 | #define for_each_netdev_continue_rcu(net, d) \ |
1255 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b | 1256 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 1257 | |
a050c33f DL |
1258 | static inline struct net_device *next_net_device(struct net_device *dev) |
1259 | { | |
1260 | struct list_head *lh; | |
1261 | struct net *net; | |
1262 | ||
c346dca1 | 1263 | net = dev_net(dev); |
a050c33f DL |
1264 | lh = dev->dev_list.next; |
1265 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1266 | } | |
1267 | ||
ce81b76a ED |
1268 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1269 | { | |
1270 | struct list_head *lh; | |
1271 | struct net *net; | |
1272 | ||
1273 | net = dev_net(dev); | |
1274 | lh = rcu_dereference(dev->dev_list.next); | |
1275 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1276 | } | |
1277 | ||
a050c33f DL |
1278 | static inline struct net_device *first_net_device(struct net *net) |
1279 | { | |
1280 | return list_empty(&net->dev_base_head) ? NULL : | |
1281 | net_device_entry(net->dev_base_head.next); | |
1282 | } | |
7562f876 | 1283 | |
1da177e4 LT |
1284 | extern int netdev_boot_setup_check(struct net_device *dev); |
1285 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
881d966b EB |
1286 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); |
1287 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1288 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1da177e4 LT |
1289 | extern void dev_add_pack(struct packet_type *pt); |
1290 | extern void dev_remove_pack(struct packet_type *pt); | |
1291 | extern void __dev_remove_pack(struct packet_type *pt); | |
1292 | ||
bb69ae04 ED |
1293 | extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
1294 | unsigned short mask); | |
881d966b | 1295 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
72c9528b | 1296 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
881d966b | 1297 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
1da177e4 LT |
1298 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
1299 | extern int dev_open(struct net_device *dev); | |
1300 | extern int dev_close(struct net_device *dev); | |
0187bdfb | 1301 | extern void dev_disable_lro(struct net_device *dev); |
1da177e4 LT |
1302 | extern int dev_queue_xmit(struct sk_buff *skb); |
1303 | extern int register_netdevice(struct net_device *dev); | |
44a0873d ED |
1304 | extern void unregister_netdevice_queue(struct net_device *dev, |
1305 | struct list_head *head); | |
9b5e383c | 1306 | extern void unregister_netdevice_many(struct list_head *head); |
44a0873d ED |
1307 | static inline void unregister_netdevice(struct net_device *dev) |
1308 | { | |
1309 | unregister_netdevice_queue(dev, NULL); | |
1310 | } | |
1311 | ||
1da177e4 LT |
1312 | extern void free_netdev(struct net_device *dev); |
1313 | extern void synchronize_net(void); | |
1314 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1315 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
937f1ba5 | 1316 | extern int init_dummy_netdev(struct net_device *dev); |
9d40bbda | 1317 | extern void netdev_resync_ops(struct net_device *dev); |
937f1ba5 | 1318 | |
ad7379d4 | 1319 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
881d966b EB |
1320 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1321 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
fb699dfd | 1322 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
1da177e4 LT |
1323 | extern int dev_restart(struct net_device *dev); |
1324 | #ifdef CONFIG_NETPOLL_TRAP | |
1325 | extern int netpoll_trap(void); | |
1326 | #endif | |
86911732 HX |
1327 | extern int skb_gro_receive(struct sk_buff **head, |
1328 | struct sk_buff *skb); | |
78a478d0 | 1329 | extern void skb_gro_reset_offset(struct sk_buff *skb); |
86911732 HX |
1330 | |
1331 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1332 | { | |
1333 | return NAPI_GRO_CB(skb)->data_offset; | |
1334 | } | |
1335 | ||
1336 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1337 | { | |
1338 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1339 | } | |
1340 | ||
1341 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1342 | { | |
1343 | NAPI_GRO_CB(skb)->data_offset += len; | |
1344 | } | |
1345 | ||
a5b1cf28 HX |
1346 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
1347 | unsigned int offset) | |
86911732 | 1348 | { |
a5b1cf28 HX |
1349 | return NAPI_GRO_CB(skb)->frag0 + offset; |
1350 | } | |
78a478d0 | 1351 | |
a5b1cf28 HX |
1352 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
1353 | { | |
1354 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1355 | } | |
78a478d0 | 1356 | |
a5b1cf28 HX |
1357 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
1358 | unsigned int offset) | |
1359 | { | |
1360 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
1361 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
1362 | return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; | |
86911732 | 1363 | } |
1da177e4 | 1364 | |
aa4b9f53 HX |
1365 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
1366 | { | |
78d3fd0b | 1367 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
aa4b9f53 HX |
1368 | } |
1369 | ||
36e7b1b8 HX |
1370 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
1371 | { | |
78d3fd0b HX |
1372 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
1373 | skb_network_offset(skb); | |
36e7b1b8 HX |
1374 | } |
1375 | ||
0c4e8581 SH |
1376 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
1377 | unsigned short type, | |
3b04ddde SH |
1378 | const void *daddr, const void *saddr, |
1379 | unsigned len) | |
0c4e8581 | 1380 | { |
f1ecfd5d | 1381 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 1382 | return 0; |
3b04ddde SH |
1383 | |
1384 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
1385 | } |
1386 | ||
b95cce35 SH |
1387 | static inline int dev_parse_header(const struct sk_buff *skb, |
1388 | unsigned char *haddr) | |
1389 | { | |
1390 | const struct net_device *dev = skb->dev; | |
1391 | ||
1b83336b | 1392 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 1393 | return 0; |
3b04ddde | 1394 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
1395 | } |
1396 | ||
1da177e4 LT |
1397 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
1398 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1399 | static inline int unregister_gifconf(unsigned int family) | |
1400 | { | |
1401 | return register_gifconf(family, NULL); | |
1402 | } | |
1403 | ||
1404 | /* | |
88751275 | 1405 | * Incoming packets are placed on per-cpu queues |
1da177e4 | 1406 | */ |
d94d9fee | 1407 | struct softnet_data { |
37437bb2 | 1408 | struct Qdisc *output_queue; |
a9cbd588 | 1409 | struct Qdisc **output_queue_tailp; |
1da177e4 | 1410 | struct list_head poll_list; |
1da177e4 | 1411 | struct sk_buff *completion_queue; |
6e7676c1 | 1412 | struct sk_buff_head process_queue; |
1da177e4 | 1413 | |
dee42870 | 1414 | /* stats */ |
cd7b5396 DM |
1415 | unsigned int processed; |
1416 | unsigned int time_squeeze; | |
1417 | unsigned int cpu_collision; | |
1418 | unsigned int received_rps; | |
dee42870 | 1419 | |
fd793d89 | 1420 | #ifdef CONFIG_RPS |
88751275 ED |
1421 | struct softnet_data *rps_ipi_list; |
1422 | ||
1423 | /* Elements below can be accessed between CPUs for RPS */ | |
0a9627f2 | 1424 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
1425 | struct softnet_data *rps_ipi_next; |
1426 | unsigned int cpu; | |
fec5e652 | 1427 | unsigned int input_queue_head; |
76cc8b13 | 1428 | unsigned int input_queue_tail; |
1e94d72f | 1429 | #endif |
dee42870 | 1430 | unsigned dropped; |
0a9627f2 | 1431 | struct sk_buff_head input_pkt_queue; |
bea3348e | 1432 | struct napi_struct backlog; |
1da177e4 LT |
1433 | }; |
1434 | ||
76cc8b13 | 1435 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
1436 | { |
1437 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
1438 | sd->input_queue_head++; |
1439 | #endif | |
1440 | } | |
1441 | ||
1442 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
1443 | unsigned int *qtail) | |
1444 | { | |
1445 | #ifdef CONFIG_RPS | |
1446 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
1447 | #endif |
1448 | } | |
1449 | ||
0a9627f2 | 1450 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 LT |
1451 | |
1452 | #define HAVE_NETIF_QUEUE | |
1453 | ||
37437bb2 | 1454 | extern void __netif_schedule(struct Qdisc *q); |
1da177e4 | 1455 | |
86d804e1 | 1456 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 1457 | { |
79d16385 | 1458 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) |
37437bb2 | 1459 | __netif_schedule(txq->qdisc); |
86d804e1 DM |
1460 | } |
1461 | ||
fd2ea0a7 DM |
1462 | static inline void netif_tx_schedule_all(struct net_device *dev) |
1463 | { | |
1464 | unsigned int i; | |
1465 | ||
1466 | for (i = 0; i < dev->num_tx_queues; i++) | |
1467 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1468 | } | |
1469 | ||
d29f749e DJ |
1470 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
1471 | { | |
1472 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1473 | } | |
1474 | ||
bea3348e SH |
1475 | /** |
1476 | * netif_start_queue - allow transmit | |
1477 | * @dev: network device | |
1478 | * | |
1479 | * Allow upper layers to call the device hard_start_xmit routine. | |
1480 | */ | |
1da177e4 LT |
1481 | static inline void netif_start_queue(struct net_device *dev) |
1482 | { | |
e8a0464c | 1483 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1484 | } |
1485 | ||
fd2ea0a7 DM |
1486 | static inline void netif_tx_start_all_queues(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_start_queue(txq); | |
1493 | } | |
1494 | } | |
1495 | ||
79d16385 | 1496 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 LT |
1497 | { |
1498 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 | 1499 | if (netpoll_trap()) { |
7b3d3e4f | 1500 | netif_tx_start_queue(dev_queue); |
1da177e4 | 1501 | return; |
5f286e11 | 1502 | } |
1da177e4 | 1503 | #endif |
79d16385 | 1504 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) |
37437bb2 | 1505 | __netif_schedule(dev_queue->qdisc); |
79d16385 DM |
1506 | } |
1507 | ||
d29f749e DJ |
1508 | /** |
1509 | * netif_wake_queue - restart transmit | |
1510 | * @dev: network device | |
1511 | * | |
1512 | * Allow upper layers to call the device hard_start_xmit routine. | |
1513 | * Used for flow control when transmit resources are available. | |
1514 | */ | |
79d16385 DM |
1515 | static inline void netif_wake_queue(struct net_device *dev) |
1516 | { | |
e8a0464c | 1517 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1518 | } |
1519 | ||
fd2ea0a7 DM |
1520 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
1521 | { | |
1522 | unsigned int i; | |
1523 | ||
1524 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1525 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1526 | netif_tx_wake_queue(txq); | |
1527 | } | |
1528 | } | |
1529 | ||
d29f749e DJ |
1530 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
1531 | { | |
1532 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1533 | } | |
1534 | ||
bea3348e SH |
1535 | /** |
1536 | * netif_stop_queue - stop transmitted packets | |
1537 | * @dev: network device | |
1538 | * | |
1539 | * Stop upper layers calling the device hard_start_xmit routine. | |
1540 | * Used for flow control when transmit resources are unavailable. | |
1541 | */ | |
1da177e4 LT |
1542 | static inline void netif_stop_queue(struct net_device *dev) |
1543 | { | |
e8a0464c | 1544 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1545 | } |
1546 | ||
fd2ea0a7 DM |
1547 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
1548 | { | |
1549 | unsigned int i; | |
1550 | ||
1551 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1552 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1553 | netif_tx_stop_queue(txq); | |
1554 | } | |
1555 | } | |
1556 | ||
d29f749e DJ |
1557 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
1558 | { | |
1559 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1560 | } | |
1561 | ||
bea3348e SH |
1562 | /** |
1563 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1564 | * @dev: network device | |
1565 | * | |
1566 | * Test if transmit queue on device is currently unable to send. | |
1567 | */ | |
1da177e4 LT |
1568 | static inline int netif_queue_stopped(const struct net_device *dev) |
1569 | { | |
e8a0464c | 1570 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1571 | } |
1572 | ||
c3f26a26 DM |
1573 | static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) |
1574 | { | |
1575 | return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); | |
1576 | } | |
1577 | ||
bea3348e SH |
1578 | /** |
1579 | * netif_running - test if up | |
1580 | * @dev: network device | |
1581 | * | |
1582 | * Test if the device has been brought up. | |
1583 | */ | |
1da177e4 LT |
1584 | static inline int netif_running(const struct net_device *dev) |
1585 | { | |
1586 | return test_bit(__LINK_STATE_START, &dev->state); | |
1587 | } | |
1588 | ||
f25f4e44 PWJ |
1589 | /* |
1590 | * Routines to manage the subqueues on a device. We only need start | |
1591 | * stop, and a check if it's stopped. All other device management is | |
1592 | * done at the overall netdevice level. | |
1593 | * Also test the device if we're multiqueue. | |
1594 | */ | |
bea3348e SH |
1595 | |
1596 | /** | |
1597 | * netif_start_subqueue - allow sending packets on subqueue | |
1598 | * @dev: network device | |
1599 | * @queue_index: sub queue index | |
1600 | * | |
1601 | * Start individual transmit queue of a device with multiple transmit queues. | |
1602 | */ | |
f25f4e44 PWJ |
1603 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
1604 | { | |
fd2ea0a7 | 1605 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
1606 | |
1607 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
1608 | } |
1609 | ||
bea3348e SH |
1610 | /** |
1611 | * netif_stop_subqueue - stop sending packets on subqueue | |
1612 | * @dev: network device | |
1613 | * @queue_index: sub queue index | |
1614 | * | |
1615 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1616 | */ | |
f25f4e44 PWJ |
1617 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
1618 | { | |
fd2ea0a7 | 1619 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
1620 | #ifdef CONFIG_NETPOLL_TRAP |
1621 | if (netpoll_trap()) | |
1622 | return; | |
1623 | #endif | |
7b3d3e4f | 1624 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
1625 | } |
1626 | ||
bea3348e SH |
1627 | /** |
1628 | * netif_subqueue_stopped - test status of subqueue | |
1629 | * @dev: network device | |
1630 | * @queue_index: sub queue index | |
1631 | * | |
1632 | * Check individual transmit queue of a device with multiple transmit queues. | |
1633 | */ | |
668f895a | 1634 | static inline int __netif_subqueue_stopped(const struct net_device *dev, |
f25f4e44 PWJ |
1635 | u16 queue_index) |
1636 | { | |
fd2ea0a7 | 1637 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
1638 | |
1639 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
1640 | } |
1641 | ||
668f895a PE |
1642 | static inline int netif_subqueue_stopped(const struct net_device *dev, |
1643 | struct sk_buff *skb) | |
1644 | { | |
1645 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1646 | } | |
bea3348e SH |
1647 | |
1648 | /** | |
1649 | * netif_wake_subqueue - allow sending packets on subqueue | |
1650 | * @dev: network device | |
1651 | * @queue_index: sub queue index | |
1652 | * | |
1653 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1654 | */ | |
f25f4e44 PWJ |
1655 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
1656 | { | |
fd2ea0a7 | 1657 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
1658 | #ifdef CONFIG_NETPOLL_TRAP |
1659 | if (netpoll_trap()) | |
1660 | return; | |
1661 | #endif | |
fd2ea0a7 | 1662 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) |
37437bb2 | 1663 | __netif_schedule(txq->qdisc); |
f25f4e44 PWJ |
1664 | } |
1665 | ||
bea3348e SH |
1666 | /** |
1667 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1668 | * @dev: network device | |
1669 | * | |
1670 | * Check if device has multiple transmit queues | |
bea3348e | 1671 | */ |
f25f4e44 PWJ |
1672 | static inline int netif_is_multiqueue(const struct net_device *dev) |
1673 | { | |
09e83b5d | 1674 | return (dev->num_tx_queues > 1); |
f25f4e44 | 1675 | } |
1da177e4 | 1676 | |
f0796d5c JF |
1677 | extern void netif_set_real_num_tx_queues(struct net_device *dev, |
1678 | unsigned int txq); | |
1679 | ||
1da177e4 | 1680 | /* Use this variant when it is known for sure that it |
0ef47309 ML |
1681 | * is executing from hardware interrupt context or with hardware interrupts |
1682 | * disabled. | |
1da177e4 | 1683 | */ |
bea3348e | 1684 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
1da177e4 LT |
1685 | |
1686 | /* Use this variant in places where it could be invoked | |
0ef47309 ML |
1687 | * from either hardware interrupt or other context, with hardware interrupts |
1688 | * either disabled or enabled. | |
1da177e4 | 1689 | */ |
56079431 | 1690 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 LT |
1691 | |
1692 | #define HAVE_NETIF_RX 1 | |
1693 | extern int netif_rx(struct sk_buff *skb); | |
1694 | extern int netif_rx_ni(struct sk_buff *skb); | |
1695 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1696 | extern int netif_receive_skb(struct sk_buff *skb); | |
5b252f0c | 1697 | extern gro_result_t dev_gro_receive(struct napi_struct *napi, |
96e93eab | 1698 | struct sk_buff *skb); |
c7c4b3b6 BH |
1699 | extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); |
1700 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, | |
d565b0a1 | 1701 | struct sk_buff *skb); |
96e93eab HX |
1702 | extern void napi_reuse_skb(struct napi_struct *napi, |
1703 | struct sk_buff *skb); | |
76620aaf | 1704 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
c7c4b3b6 | 1705 | extern gro_result_t napi_frags_finish(struct napi_struct *napi, |
5b252f0c BH |
1706 | struct sk_buff *skb, |
1707 | gro_result_t ret); | |
76620aaf | 1708 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); |
c7c4b3b6 | 1709 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); |
76620aaf HX |
1710 | |
1711 | static inline void napi_free_frags(struct napi_struct *napi) | |
1712 | { | |
1713 | kfree_skb(napi->skb); | |
1714 | napi->skb = NULL; | |
1715 | } | |
1716 | ||
ab95bfe0 | 1717 | extern int netdev_rx_handler_register(struct net_device *dev, |
93e2c32b JP |
1718 | rx_handler_func_t *rx_handler, |
1719 | void *rx_handler_data); | |
ab95bfe0 JP |
1720 | extern void netdev_rx_handler_unregister(struct net_device *dev); |
1721 | ||
bc1d0411 | 1722 | extern void netif_nit_deliver(struct sk_buff *skb); |
c2373ee9 | 1723 | extern int dev_valid_name(const char *name); |
881d966b EB |
1724 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
1725 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1da177e4 | 1726 | extern unsigned dev_get_flags(const struct net_device *); |
bd380811 | 1727 | extern int __dev_change_flags(struct net_device *, unsigned int flags); |
1da177e4 | 1728 | extern int dev_change_flags(struct net_device *, unsigned); |
bd380811 | 1729 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
cf04a4c7 | 1730 | extern int dev_change_name(struct net_device *, const char *); |
0b815a1a | 1731 | extern int dev_set_alias(struct net_device *, const char *, size_t); |
ce286d32 EB |
1732 | extern int dev_change_net_namespace(struct net_device *, |
1733 | struct net *, const char *); | |
1da177e4 LT |
1734 | extern int dev_set_mtu(struct net_device *, int); |
1735 | extern int dev_set_mac_address(struct net_device *, | |
1736 | struct sockaddr *); | |
f6a78bfc | 1737 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
fd2ea0a7 DM |
1738 | struct net_device *dev, |
1739 | struct netdev_queue *txq); | |
44540960 AB |
1740 | extern int dev_forward_skb(struct net_device *dev, |
1741 | struct sk_buff *skb); | |
1da177e4 | 1742 | |
20380731 | 1743 | extern int netdev_budget; |
1da177e4 LT |
1744 | |
1745 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1746 | extern void netdev_run_todo(void); | |
1747 | ||
bea3348e SH |
1748 | /** |
1749 | * dev_put - release reference to device | |
1750 | * @dev: network device | |
1751 | * | |
9ef4429b | 1752 | * Release reference to device to allow it to be freed. |
bea3348e | 1753 | */ |
1da177e4 LT |
1754 | static inline void dev_put(struct net_device *dev) |
1755 | { | |
1756 | atomic_dec(&dev->refcnt); | |
1757 | } | |
1758 | ||
bea3348e SH |
1759 | /** |
1760 | * dev_hold - get reference to device | |
1761 | * @dev: network device | |
1762 | * | |
9ef4429b | 1763 | * Hold reference to device to keep it from being freed. |
bea3348e | 1764 | */ |
15333061 SH |
1765 | static inline void dev_hold(struct net_device *dev) |
1766 | { | |
1767 | atomic_inc(&dev->refcnt); | |
1768 | } | |
1da177e4 LT |
1769 | |
1770 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1771 | * and _off may be called from IRQ context, but it is caller | |
1772 | * who is responsible for serialization of these calls. | |
b00055aa SR |
1773 | * |
1774 | * The name carrier is inappropriate, these functions should really be | |
1775 | * called netif_lowerlayer_*() because they represent the state of any | |
1776 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
1777 | */ |
1778 | ||
1779 | extern void linkwatch_fire_event(struct net_device *dev); | |
e014debe | 1780 | extern void linkwatch_forget_dev(struct net_device *dev); |
1da177e4 | 1781 | |
bea3348e SH |
1782 | /** |
1783 | * netif_carrier_ok - test if carrier present | |
1784 | * @dev: network device | |
1785 | * | |
1786 | * Check if carrier is present on device | |
1787 | */ | |
1da177e4 LT |
1788 | static inline int netif_carrier_ok(const struct net_device *dev) |
1789 | { | |
1790 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1791 | } | |
1792 | ||
9d21493b ED |
1793 | extern unsigned long dev_trans_start(struct net_device *dev); |
1794 | ||
1da177e4 LT |
1795 | extern void __netdev_watchdog_up(struct net_device *dev); |
1796 | ||
0a242efc | 1797 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 1798 | |
0a242efc | 1799 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 1800 | |
06c4648d IC |
1801 | extern void netif_notify_peers(struct net_device *dev); |
1802 | ||
bea3348e SH |
1803 | /** |
1804 | * netif_dormant_on - mark device as dormant. | |
1805 | * @dev: network device | |
1806 | * | |
1807 | * Mark device as dormant (as per RFC2863). | |
1808 | * | |
1809 | * The dormant state indicates that the relevant interface is not | |
1810 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1811 | * in a "pending" state, waiting for some external event. For "on- | |
1812 | * demand" interfaces, this new state identifies the situation where the | |
1813 | * interface is waiting for events to place it in the up state. | |
1814 | * | |
1815 | */ | |
b00055aa SR |
1816 | static inline void netif_dormant_on(struct net_device *dev) |
1817 | { | |
1818 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1819 | linkwatch_fire_event(dev); | |
1820 | } | |
1821 | ||
bea3348e SH |
1822 | /** |
1823 | * netif_dormant_off - set device as not dormant. | |
1824 | * @dev: network device | |
1825 | * | |
1826 | * Device is not in dormant state. | |
1827 | */ | |
b00055aa SR |
1828 | static inline void netif_dormant_off(struct net_device *dev) |
1829 | { | |
1830 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1831 | linkwatch_fire_event(dev); | |
1832 | } | |
1833 | ||
bea3348e SH |
1834 | /** |
1835 | * netif_dormant - test if carrier present | |
1836 | * @dev: network device | |
1837 | * | |
1838 | * Check if carrier is present on device | |
1839 | */ | |
b00055aa SR |
1840 | static inline int netif_dormant(const struct net_device *dev) |
1841 | { | |
1842 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1843 | } | |
1844 | ||
1845 | ||
bea3348e SH |
1846 | /** |
1847 | * netif_oper_up - test if device is operational | |
1848 | * @dev: network device | |
1849 | * | |
1850 | * Check if carrier is operational | |
1851 | */ | |
d94d9fee ED |
1852 | static inline int netif_oper_up(const struct net_device *dev) |
1853 | { | |
b00055aa SR |
1854 | return (dev->operstate == IF_OPER_UP || |
1855 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1856 | } | |
1857 | ||
bea3348e SH |
1858 | /** |
1859 | * netif_device_present - is device available or removed | |
1860 | * @dev: network device | |
1861 | * | |
1862 | * Check if device has not been removed from system. | |
1863 | */ | |
1da177e4 LT |
1864 | static inline int netif_device_present(struct net_device *dev) |
1865 | { | |
1866 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1867 | } | |
1868 | ||
56079431 | 1869 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 1870 | |
56079431 | 1871 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
1872 | |
1873 | /* | |
1874 | * Network interface message level settings | |
1875 | */ | |
1876 | #define HAVE_NETIF_MSG 1 | |
1877 | ||
1878 | enum { | |
1879 | NETIF_MSG_DRV = 0x0001, | |
1880 | NETIF_MSG_PROBE = 0x0002, | |
1881 | NETIF_MSG_LINK = 0x0004, | |
1882 | NETIF_MSG_TIMER = 0x0008, | |
1883 | NETIF_MSG_IFDOWN = 0x0010, | |
1884 | NETIF_MSG_IFUP = 0x0020, | |
1885 | NETIF_MSG_RX_ERR = 0x0040, | |
1886 | NETIF_MSG_TX_ERR = 0x0080, | |
1887 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1888 | NETIF_MSG_INTR = 0x0200, | |
1889 | NETIF_MSG_TX_DONE = 0x0400, | |
1890 | NETIF_MSG_RX_STATUS = 0x0800, | |
1891 | NETIF_MSG_PKTDATA = 0x1000, | |
1892 | NETIF_MSG_HW = 0x2000, | |
1893 | NETIF_MSG_WOL = 0x4000, | |
1894 | }; | |
1895 | ||
1896 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1897 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1898 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1899 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1900 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1901 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1902 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1903 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1904 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1905 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1906 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1907 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1908 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1909 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1910 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1911 | ||
1912 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1913 | { | |
1914 | /* use default */ | |
1915 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1916 | return default_msg_enable_bits; | |
1917 | if (debug_value == 0) /* no output */ | |
1918 | return 0; | |
1919 | /* set low N bits */ | |
1920 | return (1 << debug_value) - 1; | |
1921 | } | |
1922 | ||
c773e847 | 1923 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 1924 | { |
c773e847 DM |
1925 | spin_lock(&txq->_xmit_lock); |
1926 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
1927 | } |
1928 | ||
fd2ea0a7 DM |
1929 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
1930 | { | |
1931 | spin_lock_bh(&txq->_xmit_lock); | |
1932 | txq->xmit_lock_owner = smp_processor_id(); | |
1933 | } | |
1934 | ||
c3f26a26 DM |
1935 | static inline int __netif_tx_trylock(struct netdev_queue *txq) |
1936 | { | |
1937 | int ok = spin_trylock(&txq->_xmit_lock); | |
1938 | if (likely(ok)) | |
1939 | txq->xmit_lock_owner = smp_processor_id(); | |
1940 | return ok; | |
1941 | } | |
1942 | ||
1943 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
1944 | { | |
1945 | txq->xmit_lock_owner = -1; | |
1946 | spin_unlock(&txq->_xmit_lock); | |
1947 | } | |
1948 | ||
1949 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
1950 | { | |
1951 | txq->xmit_lock_owner = -1; | |
1952 | spin_unlock_bh(&txq->_xmit_lock); | |
1953 | } | |
1954 | ||
08baf561 ED |
1955 | static inline void txq_trans_update(struct netdev_queue *txq) |
1956 | { | |
1957 | if (txq->xmit_lock_owner != -1) | |
1958 | txq->trans_start = jiffies; | |
1959 | } | |
1960 | ||
d29f749e DJ |
1961 | /** |
1962 | * netif_tx_lock - grab network device transmit lock | |
1963 | * @dev: network device | |
d29f749e DJ |
1964 | * |
1965 | * Get network device transmit lock | |
1966 | */ | |
22dd7495 JHS |
1967 | static inline void netif_tx_lock(struct net_device *dev) |
1968 | { | |
e8a0464c | 1969 | unsigned int i; |
c3f26a26 | 1970 | int cpu; |
c773e847 | 1971 | |
c3f26a26 DM |
1972 | spin_lock(&dev->tx_global_lock); |
1973 | cpu = smp_processor_id(); | |
e8a0464c DM |
1974 | for (i = 0; i < dev->num_tx_queues; i++) { |
1975 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
1976 | |
1977 | /* We are the only thread of execution doing a | |
1978 | * freeze, but we have to grab the _xmit_lock in | |
1979 | * order to synchronize with threads which are in | |
1980 | * the ->hard_start_xmit() handler and already | |
1981 | * checked the frozen bit. | |
1982 | */ | |
e8a0464c | 1983 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
1984 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
1985 | __netif_tx_unlock(txq); | |
e8a0464c | 1986 | } |
932ff279 HX |
1987 | } |
1988 | ||
1989 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1990 | { | |
e8a0464c DM |
1991 | local_bh_disable(); |
1992 | netif_tx_lock(dev); | |
932ff279 HX |
1993 | } |
1994 | ||
932ff279 HX |
1995 | static inline void netif_tx_unlock(struct net_device *dev) |
1996 | { | |
e8a0464c DM |
1997 | unsigned int i; |
1998 | ||
1999 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2000 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 2001 | |
c3f26a26 DM |
2002 | /* No need to grab the _xmit_lock here. If the |
2003 | * queue is not stopped for another reason, we | |
2004 | * force a schedule. | |
2005 | */ | |
2006 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 2007 | netif_schedule_queue(txq); |
c3f26a26 DM |
2008 | } |
2009 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
2010 | } |
2011 | ||
2012 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
2013 | { | |
e8a0464c DM |
2014 | netif_tx_unlock(dev); |
2015 | local_bh_enable(); | |
932ff279 HX |
2016 | } |
2017 | ||
c773e847 | 2018 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 2019 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2020 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
2021 | } \ |
2022 | } | |
2023 | ||
c773e847 | 2024 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 2025 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2026 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
2027 | } \ |
2028 | } | |
2029 | ||
1da177e4 LT |
2030 | static inline void netif_tx_disable(struct net_device *dev) |
2031 | { | |
fd2ea0a7 | 2032 | unsigned int i; |
c3f26a26 | 2033 | int cpu; |
fd2ea0a7 | 2034 | |
c3f26a26 DM |
2035 | local_bh_disable(); |
2036 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
2037 | for (i = 0; i < dev->num_tx_queues; i++) { |
2038 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2039 | |
2040 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 2041 | netif_tx_stop_queue(txq); |
c3f26a26 | 2042 | __netif_tx_unlock(txq); |
fd2ea0a7 | 2043 | } |
c3f26a26 | 2044 | local_bh_enable(); |
1da177e4 LT |
2045 | } |
2046 | ||
e308a5d8 DM |
2047 | static inline void netif_addr_lock(struct net_device *dev) |
2048 | { | |
2049 | spin_lock(&dev->addr_list_lock); | |
2050 | } | |
2051 | ||
2052 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
2053 | { | |
2054 | spin_lock_bh(&dev->addr_list_lock); | |
2055 | } | |
2056 | ||
2057 | static inline void netif_addr_unlock(struct net_device *dev) | |
2058 | { | |
2059 | spin_unlock(&dev->addr_list_lock); | |
2060 | } | |
2061 | ||
2062 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
2063 | { | |
2064 | spin_unlock_bh(&dev->addr_list_lock); | |
2065 | } | |
2066 | ||
f001fde5 | 2067 | /* |
31278e71 | 2068 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
2069 | * rcu_read_lock held. |
2070 | */ | |
2071 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 2072 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 2073 | |
1da177e4 LT |
2074 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
2075 | ||
2076 | extern void ether_setup(struct net_device *dev); | |
2077 | ||
2078 | /* Support for loadable net-drivers */ | |
f25f4e44 PWJ |
2079 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, |
2080 | void (*setup)(struct net_device *), | |
2081 | unsigned int queue_count); | |
2082 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
2083 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1da177e4 LT |
2084 | extern int register_netdev(struct net_device *dev); |
2085 | extern void unregister_netdev(struct net_device *dev); | |
f001fde5 | 2086 | |
22bedad3 JP |
2087 | /* General hardware address lists handling functions */ |
2088 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
2089 | struct netdev_hw_addr_list *from_list, | |
2090 | int addr_len, unsigned char addr_type); | |
2091 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, | |
2092 | struct netdev_hw_addr_list *from_list, | |
2093 | int addr_len, unsigned char addr_type); | |
2094 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, | |
2095 | struct netdev_hw_addr_list *from_list, | |
2096 | int addr_len); | |
2097 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
2098 | struct netdev_hw_addr_list *from_list, | |
2099 | int addr_len); | |
2100 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); | |
2101 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); | |
2102 | ||
f001fde5 JP |
2103 | /* Functions used for device addresses handling */ |
2104 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
2105 | unsigned char addr_type); | |
2106 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
2107 | unsigned char addr_type); | |
2108 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
2109 | struct net_device *from_dev, | |
2110 | unsigned char addr_type); | |
2111 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
2112 | struct net_device *from_dev, | |
2113 | unsigned char addr_type); | |
a748ee24 JP |
2114 | extern void dev_addr_flush(struct net_device *dev); |
2115 | extern int dev_addr_init(struct net_device *dev); | |
2116 | ||
2117 | /* Functions used for unicast addresses handling */ | |
2118 | extern int dev_uc_add(struct net_device *dev, unsigned char *addr); | |
2119 | extern int dev_uc_del(struct net_device *dev, unsigned char *addr); | |
2120 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); | |
2121 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
2122 | extern void dev_uc_flush(struct net_device *dev); | |
2123 | extern void dev_uc_init(struct net_device *dev); | |
f001fde5 | 2124 | |
22bedad3 JP |
2125 | /* Functions used for multicast addresses handling */ |
2126 | extern int dev_mc_add(struct net_device *dev, unsigned char *addr); | |
2127 | extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); | |
2128 | extern int dev_mc_del(struct net_device *dev, unsigned char *addr); | |
2129 | extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); | |
2130 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
2131 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
2132 | extern void dev_mc_flush(struct net_device *dev); | |
2133 | extern void dev_mc_init(struct net_device *dev); | |
f001fde5 | 2134 | |
4417da66 PM |
2135 | /* Functions used for secondary unicast and multicast support */ |
2136 | extern void dev_set_rx_mode(struct net_device *dev); | |
2137 | extern void __dev_set_rx_mode(struct net_device *dev); | |
dad9b335 WC |
2138 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
2139 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1da177e4 | 2140 | extern void netdev_state_change(struct net_device *dev); |
3ca5b404 | 2141 | extern int netdev_bonding_change(struct net_device *dev, |
75c78500 | 2142 | unsigned long event); |
d8a33ac4 | 2143 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 | 2144 | /* Load a device via the kmod */ |
881d966b | 2145 | extern void dev_load(struct net *net, const char *name); |
1da177e4 | 2146 | extern void dev_mcast_init(void); |
28172739 ED |
2147 | extern const struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
2148 | struct rtnl_link_stats64 *storage); | |
2149 | extern void dev_txq_stats_fold(const struct net_device *dev, | |
2150 | struct net_device_stats *stats); | |
eeda3fd6 | 2151 | |
1da177e4 | 2152 | extern int netdev_max_backlog; |
3b098e2d | 2153 | extern int netdev_tstamp_prequeue; |
1da177e4 LT |
2154 | extern int weight_p; |
2155 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
84fa7933 | 2156 | extern int skb_checksum_help(struct sk_buff *skb); |
576a30eb | 2157 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); |
fb286bb2 HX |
2158 | #ifdef CONFIG_BUG |
2159 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
2160 | #else | |
2161 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
2162 | { | |
2163 | } | |
2164 | #endif | |
1da177e4 LT |
2165 | /* rx skb timestamps */ |
2166 | extern void net_enable_timestamp(void); | |
2167 | extern void net_disable_timestamp(void); | |
2168 | ||
20380731 ACM |
2169 | #ifdef CONFIG_PROC_FS |
2170 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
2171 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
2172 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
2173 | #endif | |
2174 | ||
b8a9787e JV |
2175 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
2176 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
2177 | ||
cf04a4c7 | 2178 | extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); |
6579e57b | 2179 | |
20380731 ACM |
2180 | extern void linkwatch_run_queue(void); |
2181 | ||
b63365a2 HX |
2182 | unsigned long netdev_increment_features(unsigned long all, unsigned long one, |
2183 | unsigned long mask); | |
2184 | unsigned long netdev_fix_features(unsigned long features, const char *name); | |
7f353bf2 | 2185 | |
fc4a7489 PM |
2186 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
2187 | struct net_device *dev); | |
2188 | ||
bcd76111 | 2189 | static inline int net_gso_ok(int features, int gso_type) |
576a30eb | 2190 | { |
bcd76111 | 2191 | int feature = gso_type << NETIF_F_GSO_SHIFT; |
d6b4991a | 2192 | return (features & feature) == feature; |
576a30eb HX |
2193 | } |
2194 | ||
bcd76111 HX |
2195 | static inline int skb_gso_ok(struct sk_buff *skb, int features) |
2196 | { | |
278b2513 | 2197 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
a5bd8a13 | 2198 | (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
2199 | } |
2200 | ||
7967168c HX |
2201 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
2202 | { | |
a430a43d HX |
2203 | return skb_is_gso(skb) && |
2204 | (!skb_gso_ok(skb, dev->features) || | |
84fa7933 | 2205 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); |
7967168c HX |
2206 | } |
2207 | ||
82cc1a7a PWJ |
2208 | static inline void netif_set_gso_max_size(struct net_device *dev, |
2209 | unsigned int size) | |
2210 | { | |
2211 | dev->gso_max_size = size; | |
2212 | } | |
2213 | ||
acbbc071 ED |
2214 | extern int __skb_bond_should_drop(struct sk_buff *skb, |
2215 | struct net_device *master); | |
5d4e039b | 2216 | |
0641e4fb ED |
2217 | static inline int skb_bond_should_drop(struct sk_buff *skb, |
2218 | struct net_device *master) | |
7ea49ed7 | 2219 | { |
acbbc071 ED |
2220 | if (master) |
2221 | return __skb_bond_should_drop(skb, master); | |
7ea49ed7 DM |
2222 | return 0; |
2223 | } | |
2224 | ||
505d4f73 | 2225 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 PM |
2226 | |
2227 | static inline int dev_ethtool_get_settings(struct net_device *dev, | |
2228 | struct ethtool_cmd *cmd) | |
2229 | { | |
2230 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) | |
2231 | return -EOPNOTSUPP; | |
2232 | return dev->ethtool_ops->get_settings(dev, cmd); | |
2233 | } | |
2234 | ||
2235 | static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) | |
2236 | { | |
2237 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) | |
2238 | return 0; | |
2239 | return dev->ethtool_ops->get_rx_csum(dev); | |
2240 | } | |
2241 | ||
2242 | static inline u32 dev_ethtool_get_flags(struct net_device *dev) | |
2243 | { | |
2244 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) | |
2245 | return 0; | |
2246 | return dev->ethtool_ops->get_flags(dev); | |
2247 | } | |
571ba423 JP |
2248 | |
2249 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ | |
2250 | ||
2251 | /* netdev_printk helpers, similar to dev_printk */ | |
2252 | ||
2253 | static inline const char *netdev_name(const struct net_device *dev) | |
2254 | { | |
2255 | if (dev->reg_state != NETREG_REGISTERED) | |
2256 | return "(unregistered net_device)"; | |
2257 | return dev->name; | |
2258 | } | |
2259 | ||
256df2f3 JP |
2260 | extern int netdev_printk(const char *level, const struct net_device *dev, |
2261 | const char *format, ...) | |
2262 | __attribute__ ((format (printf, 3, 4))); | |
2263 | extern int netdev_emerg(const struct net_device *dev, const char *format, ...) | |
2264 | __attribute__ ((format (printf, 2, 3))); | |
2265 | extern int netdev_alert(const struct net_device *dev, const char *format, ...) | |
2266 | __attribute__ ((format (printf, 2, 3))); | |
2267 | extern int netdev_crit(const struct net_device *dev, const char *format, ...) | |
2268 | __attribute__ ((format (printf, 2, 3))); | |
2269 | extern int netdev_err(const struct net_device *dev, const char *format, ...) | |
2270 | __attribute__ ((format (printf, 2, 3))); | |
2271 | extern int netdev_warn(const struct net_device *dev, const char *format, ...) | |
2272 | __attribute__ ((format (printf, 2, 3))); | |
2273 | extern int netdev_notice(const struct net_device *dev, const char *format, ...) | |
2274 | __attribute__ ((format (printf, 2, 3))); | |
2275 | extern int netdev_info(const struct net_device *dev, const char *format, ...) | |
2276 | __attribute__ ((format (printf, 2, 3))); | |
571ba423 JP |
2277 | |
2278 | #if defined(DEBUG) | |
2279 | #define netdev_dbg(__dev, format, args...) \ | |
2280 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
2281 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2282 | #define netdev_dbg(__dev, format, args...) \ | |
2283 | do { \ | |
2284 | dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \ | |
2285 | netdev_name(__dev), ##args); \ | |
2286 | } while (0) | |
2287 | #else | |
2288 | #define netdev_dbg(__dev, format, args...) \ | |
2289 | ({ \ | |
2290 | if (0) \ | |
2291 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
2292 | 0; \ | |
2293 | }) | |
2294 | #endif | |
2295 | ||
2296 | #if defined(VERBOSE_DEBUG) | |
2297 | #define netdev_vdbg netdev_dbg | |
2298 | #else | |
2299 | ||
2300 | #define netdev_vdbg(dev, format, args...) \ | |
2301 | ({ \ | |
2302 | if (0) \ | |
2303 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
2304 | 0; \ | |
2305 | }) | |
2306 | #endif | |
2307 | ||
2308 | /* | |
2309 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
2310 | * of using a WARN/WARN_ON to get the message out, including the | |
2311 | * file/line information and a backtrace. | |
2312 | */ | |
2313 | #define netdev_WARN(dev, format, args...) \ | |
2314 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); | |
2315 | ||
b3d95c5c JP |
2316 | /* netif printk helpers, similar to netdev_printk */ |
2317 | ||
2318 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
2319 | do { \ | |
2320 | if (netif_msg_##type(priv)) \ | |
2321 | netdev_printk(level, (dev), fmt, ##args); \ | |
2322 | } while (0) | |
2323 | ||
f45f4321 JP |
2324 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
2325 | do { \ | |
2326 | if (netif_msg_##type(priv)) \ | |
2327 | netdev_##level(dev, fmt, ##args); \ | |
2328 | } while (0) | |
2329 | ||
b3d95c5c | 2330 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 2331 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 2332 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 2333 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 2334 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 2335 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 2336 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 2337 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 2338 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 2339 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 2340 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 2341 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 2342 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 2343 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c JP |
2344 | |
2345 | #if defined(DEBUG) | |
2346 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2347 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
2348 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2349 | #define netif_dbg(priv, type, netdev, format, args...) \ | |
2350 | do { \ | |
2351 | if (netif_msg_##type(priv)) \ | |
2352 | dynamic_dev_dbg((netdev)->dev.parent, \ | |
2353 | "%s: " format, \ | |
2354 | netdev_name(netdev), ##args); \ | |
2355 | } while (0) | |
2356 | #else | |
2357 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2358 | ({ \ | |
2359 | if (0) \ | |
2360 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
2361 | 0; \ | |
2362 | }) | |
2363 | #endif | |
2364 | ||
2365 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 2366 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
2367 | #else |
2368 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
2369 | ({ \ | |
2370 | if (0) \ | |
a4ed89cb | 2371 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
2372 | 0; \ |
2373 | }) | |
2374 | #endif | |
571ba423 | 2375 | |
1da177e4 LT |
2376 | #endif /* __KERNEL__ */ |
2377 | ||
385a154c | 2378 | #endif /* _LINUX_NETDEVICE_H */ |