Commit | Line | Data |
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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__ | |
d7fe0f24 | 34 | #include <linux/timer.h> |
bea3348e | 35 | #include <linux/delay.h> |
cc0be322 | 36 | #include <linux/mm.h> |
1da177e4 LT |
37 | #include <asm/atomic.h> |
38 | #include <asm/cache.h> | |
39 | #include <asm/byteorder.h> | |
40 | ||
1da177e4 LT |
41 | #include <linux/device.h> |
42 | #include <linux/percpu.h> | |
4d5b78c0 | 43 | #include <linux/rculist.h> |
db217334 | 44 | #include <linux/dmaengine.h> |
bea3348e | 45 | #include <linux/workqueue.h> |
1da177e4 | 46 | |
b1b67dd4 | 47 | #include <linux/ethtool.h> |
a050c33f | 48 | #include <net/net_namespace.h> |
cf85d08f | 49 | #include <net/dsa.h> |
7a6b6f51 | 50 | #ifdef CONFIG_DCB |
2f90b865 AD |
51 | #include <net/dcbnl.h> |
52 | #endif | |
a050c33f | 53 | |
1da177e4 | 54 | struct vlan_group; |
115c1d6e | 55 | struct netpoll_info; |
704232c2 JB |
56 | /* 802.11 specific */ |
57 | struct wireless_dev; | |
1da177e4 LT |
58 | /* source back-compat hooks */ |
59 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
60 | ( (netdev)->ethtool_ops = (ops) ) | |
61 | ||
62 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev | |
63 | functions are available. */ | |
64 | #define HAVE_FREE_NETDEV /* free_netdev() */ | |
65 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ | |
66 | ||
9a1654ba JP |
67 | /* Backlog congestion levels */ |
68 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
69 | #define NET_RX_DROP 1 /* packet dropped */ | |
70 | ||
572a9d7b PM |
71 | /* |
72 | * Transmit return codes: transmit return codes originate from three different | |
73 | * namespaces: | |
74 | * | |
75 | * - qdisc return codes | |
76 | * - driver transmit return codes | |
77 | * - errno values | |
78 | * | |
79 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
80 | * function. Real network devices commonly used with qdiscs should only return | |
81 | * the driver transmit return codes though - when qdiscs are used, the actual | |
82 | * transmission happens asynchronously, so the value is not propagated to | |
83 | * higher layers. Virtual network devices transmit synchronously, in this case | |
84 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
85 | * others are propagated to higher layers. | |
86 | */ | |
87 | ||
88 | /* qdisc ->enqueue() return codes. */ | |
89 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
90 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
91 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
92 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
93 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 94 | |
b9df3cb8 GR |
95 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
96 | * indicates that the device will soon be dropping packets, or already drops | |
97 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 98 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
99 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
100 | ||
dc1f8bf6 | 101 | /* Driver transmit return codes */ |
9a1654ba | 102 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 103 | |
dc1f8bf6 | 104 | enum netdev_tx { |
572a9d7b | 105 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
106 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
107 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
108 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
109 | }; |
110 | typedef enum netdev_tx netdev_tx_t; | |
111 | ||
9a1654ba JP |
112 | /* |
113 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
114 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
115 | */ | |
116 | static inline bool dev_xmit_complete(int rc) | |
117 | { | |
118 | /* | |
119 | * Positive cases with an skb consumed by a driver: | |
120 | * - successful transmission (rc == NETDEV_TX_OK) | |
121 | * - error while transmitting (rc < 0) | |
122 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
123 | */ | |
124 | if (likely(rc < NET_XMIT_MASK)) | |
125 | return true; | |
126 | ||
127 | return false; | |
128 | } | |
129 | ||
1da177e4 LT |
130 | #endif |
131 | ||
132 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
133 | ||
c88e6f51 | 134 | #ifdef __KERNEL__ |
1da177e4 LT |
135 | /* |
136 | * Compute the worst case header length according to the protocols | |
137 | * used. | |
138 | */ | |
fe2918b0 | 139 | |
caf66e58 | 140 | #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) |
8388e3da DM |
141 | # if defined(CONFIG_MAC80211_MESH) |
142 | # define LL_MAX_HEADER 128 | |
143 | # else | |
144 | # define LL_MAX_HEADER 96 | |
145 | # endif | |
c759a6b4 | 146 | #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) |
8388e3da | 147 | # define LL_MAX_HEADER 48 |
1da177e4 | 148 | #else |
8388e3da | 149 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
150 | #endif |
151 | ||
e81c7359 DM |
152 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ |
153 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
154 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
155 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
1da177e4 LT |
156 | #define MAX_HEADER LL_MAX_HEADER |
157 | #else | |
158 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
159 | #endif | |
160 | ||
c88e6f51 AB |
161 | #endif /* __KERNEL__ */ |
162 | ||
1da177e4 LT |
163 | /* |
164 | * Network device statistics. Akin to the 2.0 ether stats but | |
165 | * with byte counters. | |
166 | */ | |
fe2918b0 | 167 | |
d94d9fee | 168 | struct net_device_stats { |
1da177e4 LT |
169 | unsigned long rx_packets; /* total packets received */ |
170 | unsigned long tx_packets; /* total packets transmitted */ | |
171 | unsigned long rx_bytes; /* total bytes received */ | |
172 | unsigned long tx_bytes; /* total bytes transmitted */ | |
173 | unsigned long rx_errors; /* bad packets received */ | |
174 | unsigned long tx_errors; /* packet transmit problems */ | |
175 | unsigned long rx_dropped; /* no space in linux buffers */ | |
176 | unsigned long tx_dropped; /* no space available in linux */ | |
177 | unsigned long multicast; /* multicast packets received */ | |
178 | unsigned long collisions; | |
179 | ||
180 | /* detailed rx_errors: */ | |
181 | unsigned long rx_length_errors; | |
182 | unsigned long rx_over_errors; /* receiver ring buff overflow */ | |
183 | unsigned long rx_crc_errors; /* recved pkt with crc error */ | |
184 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ | |
185 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ | |
186 | unsigned long rx_missed_errors; /* receiver missed packet */ | |
187 | ||
188 | /* detailed tx_errors */ | |
189 | unsigned long tx_aborted_errors; | |
190 | unsigned long tx_carrier_errors; | |
191 | unsigned long tx_fifo_errors; | |
192 | unsigned long tx_heartbeat_errors; | |
193 | unsigned long tx_window_errors; | |
194 | ||
195 | /* for cslip etc */ | |
196 | unsigned long rx_compressed; | |
197 | unsigned long tx_compressed; | |
198 | }; | |
199 | ||
200 | ||
201 | /* Media selection options. */ | |
202 | enum { | |
203 | IF_PORT_UNKNOWN = 0, | |
204 | IF_PORT_10BASE2, | |
205 | IF_PORT_10BASET, | |
206 | IF_PORT_AUI, | |
207 | IF_PORT_100BASET, | |
208 | IF_PORT_100BASETX, | |
209 | IF_PORT_100BASEFX | |
210 | }; | |
211 | ||
212 | #ifdef __KERNEL__ | |
213 | ||
214 | #include <linux/cache.h> | |
215 | #include <linux/skbuff.h> | |
216 | ||
217 | struct neighbour; | |
218 | struct neigh_parms; | |
219 | struct sk_buff; | |
220 | ||
d94d9fee | 221 | struct netif_rx_stats { |
1da177e4 LT |
222 | unsigned total; |
223 | unsigned dropped; | |
224 | unsigned time_squeeze; | |
1da177e4 | 225 | unsigned cpu_collision; |
0a9627f2 | 226 | unsigned received_rps; |
1da177e4 LT |
227 | }; |
228 | ||
229 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); | |
230 | ||
f001fde5 JP |
231 | struct netdev_hw_addr { |
232 | struct list_head list; | |
233 | unsigned char addr[MAX_ADDR_LEN]; | |
234 | unsigned char type; | |
ccffad25 JP |
235 | #define NETDEV_HW_ADDR_T_LAN 1 |
236 | #define NETDEV_HW_ADDR_T_SAN 2 | |
237 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
238 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 239 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
ccffad25 JP |
240 | int refcount; |
241 | bool synced; | |
22bedad3 | 242 | bool global_use; |
f001fde5 JP |
243 | struct rcu_head rcu_head; |
244 | }; | |
245 | ||
31278e71 JP |
246 | struct netdev_hw_addr_list { |
247 | struct list_head list; | |
248 | int count; | |
249 | }; | |
250 | ||
22bedad3 JP |
251 | #define netdev_hw_addr_list_count(l) ((l)->count) |
252 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
253 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
254 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 255 | |
22bedad3 JP |
256 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
257 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
258 | #define netdev_for_each_uc_addr(ha, dev) \ | |
259 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 260 | |
22bedad3 JP |
261 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
262 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 263 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 264 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 265 | |
d94d9fee | 266 | struct hh_cache { |
1da177e4 LT |
267 | struct hh_cache *hh_next; /* Next entry */ |
268 | atomic_t hh_refcnt; /* number of users */ | |
f0490980 ED |
269 | /* |
270 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate | |
271 | * cache line on SMP. | |
272 | * They are mostly read, but hh_refcnt may be changed quite frequently, | |
273 | * incurring cache line ping pongs. | |
274 | */ | |
275 | __be16 hh_type ____cacheline_aligned_in_smp; | |
276 | /* protocol identifier, f.e ETH_P_IP | |
1da177e4 LT |
277 | * NOTE: For VLANs, this will be the |
278 | * encapuslated type. --BLG | |
279 | */ | |
d5c42c0e | 280 | u16 hh_len; /* length of header */ |
1da177e4 | 281 | int (*hh_output)(struct sk_buff *skb); |
3644f0ce | 282 | seqlock_t hh_lock; |
1da177e4 LT |
283 | |
284 | /* cached hardware header; allow for machine alignment needs. */ | |
285 | #define HH_DATA_MOD 16 | |
286 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 287 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
288 | #define HH_DATA_ALIGN(__len) \ |
289 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
290 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
291 | }; | |
292 | ||
293 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
294 | * Alternative is: | |
295 | * dev->hard_header_len ? (dev->hard_header_len + | |
296 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
297 | * | |
298 | * We could use other alignment values, but we must maintain the | |
299 | * relationship HH alignment <= LL alignment. | |
f5184d26 JB |
300 | * |
301 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device | |
302 | * may need. | |
1da177e4 LT |
303 | */ |
304 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 305 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 306 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 JB |
307 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
308 | #define LL_ALLOCATED_SPACE(dev) \ | |
309 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) | |
1da177e4 | 310 | |
3b04ddde SH |
311 | struct header_ops { |
312 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
313 | unsigned short type, const void *daddr, | |
314 | const void *saddr, unsigned len); | |
315 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
316 | int (*rebuild)(struct sk_buff *skb); | |
317 | #define HAVE_HEADER_CACHE | |
318 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); | |
319 | void (*cache_update)(struct hh_cache *hh, | |
320 | const struct net_device *dev, | |
321 | const unsigned char *haddr); | |
322 | }; | |
323 | ||
1da177e4 LT |
324 | /* These flag bits are private to the generic network queueing |
325 | * layer, they may not be explicitly referenced by any other | |
326 | * code. | |
327 | */ | |
328 | ||
d94d9fee | 329 | enum netdev_state_t { |
1da177e4 LT |
330 | __LINK_STATE_START, |
331 | __LINK_STATE_PRESENT, | |
1da177e4 | 332 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
333 | __LINK_STATE_LINKWATCH_PENDING, |
334 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
335 | }; |
336 | ||
337 | ||
338 | /* | |
339 | * This structure holds at boot time configured netdevice settings. They | |
fe2918b0 | 340 | * are then used in the device probing. |
1da177e4 LT |
341 | */ |
342 | struct netdev_boot_setup { | |
343 | char name[IFNAMSIZ]; | |
344 | struct ifmap map; | |
345 | }; | |
346 | #define NETDEV_BOOT_SETUP_MAX 8 | |
347 | ||
20380731 | 348 | extern int __init netdev_boot_setup(char *str); |
1da177e4 | 349 | |
bea3348e SH |
350 | /* |
351 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
352 | */ | |
353 | struct napi_struct { | |
354 | /* The poll_list must only be managed by the entity which | |
355 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
356 | * whoever atomically sets that bit can add this napi_struct | |
357 | * to the per-cpu poll_list, and whoever clears that bit | |
358 | * can remove from the list right before clearing the bit. | |
359 | */ | |
360 | struct list_head poll_list; | |
361 | ||
362 | unsigned long state; | |
363 | int weight; | |
364 | int (*poll)(struct napi_struct *, int); | |
365 | #ifdef CONFIG_NETPOLL | |
366 | spinlock_t poll_lock; | |
367 | int poll_owner; | |
bea3348e | 368 | #endif |
4ae5544f HX |
369 | |
370 | unsigned int gro_count; | |
371 | ||
5d38a079 | 372 | struct net_device *dev; |
d565b0a1 HX |
373 | struct list_head dev_list; |
374 | struct sk_buff *gro_list; | |
5d38a079 | 375 | struct sk_buff *skb; |
bea3348e SH |
376 | }; |
377 | ||
d94d9fee | 378 | enum { |
bea3348e | 379 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 380 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 381 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
bea3348e SH |
382 | }; |
383 | ||
5b252f0c | 384 | enum gro_result { |
d1c76af9 HX |
385 | GRO_MERGED, |
386 | GRO_MERGED_FREE, | |
387 | GRO_HELD, | |
388 | GRO_NORMAL, | |
389 | GRO_DROP, | |
390 | }; | |
5b252f0c | 391 | typedef enum gro_result gro_result_t; |
d1c76af9 | 392 | |
b3c97528 | 393 | extern void __napi_schedule(struct napi_struct *n); |
bea3348e | 394 | |
a0a46196 DM |
395 | static inline int napi_disable_pending(struct napi_struct *n) |
396 | { | |
397 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
398 | } | |
399 | ||
bea3348e SH |
400 | /** |
401 | * napi_schedule_prep - check if napi can be scheduled | |
402 | * @n: napi context | |
403 | * | |
404 | * Test if NAPI routine is already running, and if not mark | |
405 | * it as running. This is used as a condition variable | |
a0a46196 DM |
406 | * insure only one NAPI poll instance runs. We also make |
407 | * sure there is no pending NAPI disable. | |
bea3348e SH |
408 | */ |
409 | static inline int napi_schedule_prep(struct napi_struct *n) | |
410 | { | |
a0a46196 DM |
411 | return !napi_disable_pending(n) && |
412 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
413 | } |
414 | ||
415 | /** | |
416 | * napi_schedule - schedule NAPI poll | |
417 | * @n: napi context | |
418 | * | |
419 | * Schedule NAPI poll routine to be called if it is not already | |
420 | * running. | |
421 | */ | |
422 | static inline void napi_schedule(struct napi_struct *n) | |
423 | { | |
424 | if (napi_schedule_prep(n)) | |
425 | __napi_schedule(n); | |
426 | } | |
427 | ||
bfe13f54 RD |
428 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
429 | static inline int napi_reschedule(struct napi_struct *napi) | |
430 | { | |
431 | if (napi_schedule_prep(napi)) { | |
432 | __napi_schedule(napi); | |
433 | return 1; | |
434 | } | |
435 | return 0; | |
436 | } | |
437 | ||
bea3348e SH |
438 | /** |
439 | * napi_complete - NAPI processing complete | |
440 | * @n: napi context | |
441 | * | |
442 | * Mark NAPI processing as complete. | |
443 | */ | |
d565b0a1 HX |
444 | extern void __napi_complete(struct napi_struct *n); |
445 | extern void napi_complete(struct napi_struct *n); | |
bea3348e SH |
446 | |
447 | /** | |
448 | * napi_disable - prevent NAPI from scheduling | |
449 | * @n: napi context | |
450 | * | |
451 | * Stop NAPI from being scheduled on this context. | |
452 | * Waits till any outstanding processing completes. | |
453 | */ | |
454 | static inline void napi_disable(struct napi_struct *n) | |
455 | { | |
a0a46196 | 456 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 457 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 458 | msleep(1); |
a0a46196 | 459 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
460 | } |
461 | ||
462 | /** | |
463 | * napi_enable - enable NAPI scheduling | |
464 | * @n: napi context | |
465 | * | |
466 | * Resume NAPI from being scheduled on this context. | |
467 | * Must be paired with napi_disable. | |
468 | */ | |
469 | static inline void napi_enable(struct napi_struct *n) | |
470 | { | |
471 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
472 | smp_mb__before_clear_bit(); | |
473 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
474 | } | |
475 | ||
c264c3de SH |
476 | #ifdef CONFIG_SMP |
477 | /** | |
478 | * napi_synchronize - wait until NAPI is not running | |
479 | * @n: napi context | |
480 | * | |
481 | * Wait until NAPI is done being scheduled on this context. | |
482 | * Waits till any outstanding processing completes but | |
483 | * does not disable future activations. | |
484 | */ | |
485 | static inline void napi_synchronize(const struct napi_struct *n) | |
486 | { | |
487 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
488 | msleep(1); | |
489 | } | |
490 | #else | |
491 | # define napi_synchronize(n) barrier() | |
492 | #endif | |
493 | ||
d94d9fee | 494 | enum netdev_queue_state_t { |
79d16385 | 495 | __QUEUE_STATE_XOFF, |
c3f26a26 | 496 | __QUEUE_STATE_FROZEN, |
79d16385 DM |
497 | }; |
498 | ||
bb949fbd | 499 | struct netdev_queue { |
6a321cb3 ED |
500 | /* |
501 | * read mostly part | |
502 | */ | |
bb949fbd | 503 | struct net_device *dev; |
b0e1e646 | 504 | struct Qdisc *qdisc; |
79d16385 | 505 | unsigned long state; |
b0e1e646 | 506 | struct Qdisc *qdisc_sleeping; |
6a321cb3 ED |
507 | /* |
508 | * write mostly part | |
509 | */ | |
510 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
511 | int xmit_lock_owner; | |
9d21493b ED |
512 | /* |
513 | * please use this field instead of dev->trans_start | |
514 | */ | |
515 | unsigned long trans_start; | |
7004bf25 ED |
516 | unsigned long tx_bytes; |
517 | unsigned long tx_packets; | |
518 | unsigned long tx_dropped; | |
e8a0464c | 519 | } ____cacheline_aligned_in_smp; |
bb949fbd | 520 | |
df334545 | 521 | #ifdef CONFIG_RPS |
0a9627f2 TH |
522 | /* |
523 | * This structure holds an RPS map which can be of variable length. The | |
524 | * map is an array of CPUs. | |
525 | */ | |
526 | struct rps_map { | |
527 | unsigned int len; | |
528 | struct rcu_head rcu; | |
529 | u16 cpus[0]; | |
530 | }; | |
531 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16))) | |
532 | ||
533 | /* This structure contains an instance of an RX queue. */ | |
534 | struct netdev_rx_queue { | |
535 | struct rps_map *rps_map; | |
536 | struct kobject kobj; | |
537 | struct netdev_rx_queue *first; | |
538 | atomic_t count; | |
539 | } ____cacheline_aligned_in_smp; | |
df334545 | 540 | #endif |
d314774c SH |
541 | |
542 | /* | |
543 | * This structure defines the management hooks for network devices. | |
00829823 SH |
544 | * The following hooks can be defined; unless noted otherwise, they are |
545 | * optional and can be filled with a null pointer. | |
d314774c SH |
546 | * |
547 | * int (*ndo_init)(struct net_device *dev); | |
548 | * This function is called once when network device is registered. | |
549 | * The network device can use this to any late stage initializaton | |
550 | * or semantic validattion. It can fail with an error code which will | |
551 | * be propogated back to register_netdev | |
552 | * | |
553 | * void (*ndo_uninit)(struct net_device *dev); | |
554 | * This function is called when device is unregistered or when registration | |
555 | * fails. It is not called if init fails. | |
556 | * | |
557 | * int (*ndo_open)(struct net_device *dev); | |
558 | * This function is called when network device transistions to the up | |
559 | * state. | |
560 | * | |
561 | * int (*ndo_stop)(struct net_device *dev); | |
562 | * This function is called when network device transistions to the down | |
563 | * state. | |
564 | * | |
dc1f8bf6 SH |
565 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
566 | * struct net_device *dev); | |
00829823 | 567 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
568 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
569 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
570 | * Required can not be NULL. |
571 | * | |
572 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
573 | * Called to decide which queue to when device supports multiple | |
574 | * transmit queues. | |
575 | * | |
d314774c SH |
576 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
577 | * This function is called to allow device receiver to make | |
578 | * changes to configuration when multicast or promiscious is enabled. | |
579 | * | |
580 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
581 | * This function is called device changes address list filtering. | |
582 | * | |
583 | * void (*ndo_set_multicast_list)(struct net_device *dev); | |
584 | * This function is called when the multicast address list changes. | |
585 | * | |
586 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
587 | * This function is called when the Media Access Control address | |
37b607c5 | 588 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
589 | * mac address can not be changed. |
590 | * | |
591 | * int (*ndo_validate_addr)(struct net_device *dev); | |
592 | * Test if Media Access Control address is valid for the device. | |
593 | * | |
594 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
595 | * Called when a user request an ioctl which can't be handled by | |
596 | * the generic interface code. If not defined ioctl's return | |
597 | * not supported error code. | |
598 | * | |
599 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
600 | * Used to set network devices bus interface parameters. This interface | |
601 | * is retained for legacy reason, new devices should use the bus | |
602 | * interface (PCI) for low level management. | |
603 | * | |
604 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
605 | * Called when a user wants to change the Maximum Transfer Unit | |
606 | * of a device. If not defined, any request to change MTU will | |
607 | * will return an error. | |
608 | * | |
00829823 | 609 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
610 | * Callback uses when the transmitter has not made any progress |
611 | * for dev->watchdog ticks. | |
612 | * | |
d308e38f | 613 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c SH |
614 | * Called when a user wants to get the network device usage |
615 | * statistics. If not defined, the counters in dev->stats will | |
616 | * be used. | |
617 | * | |
618 | * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); | |
619 | * If device support VLAN receive accleration | |
620 | * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called | |
621 | * when vlan groups for the device changes. Note: grp is NULL | |
622 | * if no vlan's groups are being used. | |
623 | * | |
624 | * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); | |
625 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
626 | * this function is called when a VLAN id is registered. | |
627 | * | |
628 | * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); | |
629 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
630 | * this function is called when a VLAN id is unregistered. | |
631 | * | |
632 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
633 | * |
634 | * SR-IOV management functions. | |
635 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
636 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
637 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
638 | * int (*ndo_get_vf_config)(struct net_device *dev, | |
639 | * int vf, struct ifla_vf_info *ivf); | |
d314774c | 640 | */ |
47fd5b83 | 641 | #define HAVE_NET_DEVICE_OPS |
d314774c SH |
642 | struct net_device_ops { |
643 | int (*ndo_init)(struct net_device *dev); | |
644 | void (*ndo_uninit)(struct net_device *dev); | |
645 | int (*ndo_open)(struct net_device *dev); | |
646 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 647 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
648 | struct net_device *dev); |
649 | u16 (*ndo_select_queue)(struct net_device *dev, | |
650 | struct sk_buff *skb); | |
d314774c SH |
651 | void (*ndo_change_rx_flags)(struct net_device *dev, |
652 | int flags); | |
d314774c | 653 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c | 654 | void (*ndo_set_multicast_list)(struct net_device *dev); |
d314774c SH |
655 | int (*ndo_set_mac_address)(struct net_device *dev, |
656 | void *addr); | |
d314774c | 657 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
658 | int (*ndo_do_ioctl)(struct net_device *dev, |
659 | struct ifreq *ifr, int cmd); | |
d314774c SH |
660 | int (*ndo_set_config)(struct net_device *dev, |
661 | struct ifmap *map); | |
00829823 SH |
662 | int (*ndo_change_mtu)(struct net_device *dev, |
663 | int new_mtu); | |
664 | int (*ndo_neigh_setup)(struct net_device *dev, | |
665 | struct neigh_parms *); | |
d314774c SH |
666 | void (*ndo_tx_timeout) (struct net_device *dev); |
667 | ||
668 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); | |
669 | ||
670 | void (*ndo_vlan_rx_register)(struct net_device *dev, | |
671 | struct vlan_group *grp); | |
672 | void (*ndo_vlan_rx_add_vid)(struct net_device *dev, | |
673 | unsigned short vid); | |
674 | void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, | |
675 | unsigned short vid); | |
676 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
d314774c SH |
677 | void (*ndo_poll_controller)(struct net_device *dev); |
678 | #endif | |
95c26df8 WM |
679 | int (*ndo_set_vf_mac)(struct net_device *dev, |
680 | int queue, u8 *mac); | |
681 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
682 | int queue, u16 vlan, u8 qos); | |
683 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
684 | int vf, int rate); | |
685 | int (*ndo_get_vf_config)(struct net_device *dev, | |
686 | int vf, | |
687 | struct ifla_vf_info *ivf); | |
4d288d57 | 688 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
cb454399 YZ |
689 | int (*ndo_fcoe_enable)(struct net_device *dev); |
690 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
691 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
692 | u16 xid, | |
693 | struct scatterlist *sgl, | |
694 | unsigned int sgc); | |
695 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
696 | u16 xid); | |
df5c7945 YZ |
697 | #define NETDEV_FCOE_WWNN 0 |
698 | #define NETDEV_FCOE_WWPN 1 | |
699 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
700 | u64 *wwn, int type); | |
4d288d57 | 701 | #endif |
d314774c SH |
702 | }; |
703 | ||
1da177e4 LT |
704 | /* |
705 | * The DEVICE structure. | |
706 | * Actually, this whole structure is a big mistake. It mixes I/O | |
707 | * data with strictly "high-level" data, and it has to know about | |
708 | * almost every data structure used in the INET module. | |
709 | * | |
710 | * FIXME: cleanup struct net_device such that network protocol info | |
711 | * moves out. | |
712 | */ | |
713 | ||
d94d9fee | 714 | struct net_device { |
1da177e4 LT |
715 | |
716 | /* | |
717 | * This is the first field of the "visible" part of this structure | |
718 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
719 | * the interface. | |
720 | */ | |
721 | char name[IFNAMSIZ]; | |
9356b8fc ED |
722 | /* device name hash chain */ |
723 | struct hlist_node name_hlist; | |
0b815a1a SH |
724 | /* snmp alias */ |
725 | char *ifalias; | |
1da177e4 LT |
726 | |
727 | /* | |
728 | * I/O specific fields | |
729 | * FIXME: Merge these and struct ifmap into one | |
730 | */ | |
731 | unsigned long mem_end; /* shared mem end */ | |
732 | unsigned long mem_start; /* shared mem start */ | |
733 | unsigned long base_addr; /* device I/O address */ | |
734 | unsigned int irq; /* device IRQ number */ | |
735 | ||
736 | /* | |
737 | * Some hardware also needs these fields, but they are not | |
738 | * part of the usual set specified in Space.c. | |
739 | */ | |
740 | ||
741 | unsigned char if_port; /* Selectable AUI, TP,..*/ | |
742 | unsigned char dma; /* DMA channel */ | |
743 | ||
744 | unsigned long state; | |
745 | ||
7562f876 | 746 | struct list_head dev_list; |
bea3348e | 747 | struct list_head napi_list; |
44a0873d | 748 | struct list_head unreg_list; |
1da177e4 | 749 | |
9356b8fc ED |
750 | /* Net device features */ |
751 | unsigned long features; | |
752 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ | |
d212f87b | 753 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ |
9356b8fc ED |
754 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
755 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ | |
d212f87b | 756 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ |
9356b8fc ED |
757 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
758 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ | |
759 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ | |
760 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ | |
761 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ | |
762 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ | |
37c3185a | 763 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ |
e24eb521 CB |
764 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ |
765 | /* do not use LLTX in new drivers */ | |
ce286d32 | 766 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ |
d565b0a1 | 767 | #define NETIF_F_GRO 16384 /* Generic receive offload */ |
3ae7c0b2 | 768 | #define NETIF_F_LRO 32768 /* large receive offload */ |
7967168c | 769 | |
8dc92f7e | 770 | /* the GSO_MASK reserves bits 16 through 23 */ |
01d5b2fc | 771 | #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ |
8dc92f7e | 772 | #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ |
bb2af4f5 | 773 | #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ |
15682bc4 | 774 | #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ |
b00fabb4 | 775 | #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ |
01d5b2fc | 776 | |
7967168c | 777 | /* Segmentation offload features */ |
289c79a4 | 778 | #define NETIF_F_GSO_SHIFT 16 |
43eb99c5 | 779 | #define NETIF_F_GSO_MASK 0x00ff0000 |
7967168c | 780 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
f83ef8c0 | 781 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) |
576a30eb | 782 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) |
f83ef8c0 HX |
783 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) |
784 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) | |
01d5b2fc | 785 | #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) |
9356b8fc | 786 | |
78eb8877 HX |
787 | /* List of features with software fallbacks. */ |
788 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) | |
789 | ||
d212f87b | 790 | |
8648b305 | 791 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
d212f87b SH |
792 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) |
793 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) | |
794 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) | |
8648b305 | 795 | |
b63365a2 HX |
796 | /* |
797 | * If one device supports one of these features, then enable them | |
798 | * for all in netdev_increment_features. | |
799 | */ | |
800 | #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ | |
d314774c | 801 | NETIF_F_SG | NETIF_F_HIGHDMA | \ |
b63365a2 HX |
802 | NETIF_F_FRAGLIST) |
803 | ||
1da177e4 LT |
804 | /* Interface index. Unique device identifier */ |
805 | int ifindex; | |
806 | int iflink; | |
807 | ||
c45d286e | 808 | struct net_device_stats stats; |
1da177e4 | 809 | |
b86e0280 | 810 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
811 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
812 | * See <net/iw_handler.h> for details. Jean II */ | |
813 | const struct iw_handler_def * wireless_handlers; | |
814 | /* Instance data managed by the core of Wireless Extensions. */ | |
815 | struct iw_public_data * wireless_data; | |
b86e0280 | 816 | #endif |
d314774c SH |
817 | /* Management operations */ |
818 | const struct net_device_ops *netdev_ops; | |
76fd8593 | 819 | const struct ethtool_ops *ethtool_ops; |
1da177e4 | 820 | |
3b04ddde SH |
821 | /* Hardware header description */ |
822 | const struct header_ops *header_ops; | |
823 | ||
b00055aa | 824 | unsigned int flags; /* interface flags (a la BSD) */ |
1da177e4 LT |
825 | unsigned short gflags; |
826 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ | |
827 | unsigned short padded; /* How much padding added by alloc_netdev() */ | |
828 | ||
b00055aa SR |
829 | unsigned char operstate; /* RFC2863 operstate */ |
830 | unsigned char link_mode; /* mapping policy to operstate */ | |
831 | ||
1da177e4 LT |
832 | unsigned mtu; /* interface MTU value */ |
833 | unsigned short type; /* interface hardware type */ | |
834 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 835 | |
f5184d26 JB |
836 | /* extra head- and tailroom the hardware may need, but not in all cases |
837 | * can this be guaranteed, especially tailroom. Some cases also use | |
838 | * LL_MAX_HEADER instead to allocate the skb. | |
839 | */ | |
840 | unsigned short needed_headroom; | |
841 | unsigned short needed_tailroom; | |
842 | ||
1da177e4 LT |
843 | struct net_device *master; /* Pointer to master device of a group, |
844 | * which this device is member of. | |
845 | */ | |
846 | ||
847 | /* Interface address info. */ | |
a6f9a705 | 848 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1da177e4 LT |
849 | unsigned char addr_len; /* hardware address length */ |
850 | unsigned short dev_id; /* for shared network cards */ | |
851 | ||
ccffad25 | 852 | spinlock_t addr_list_lock; |
22bedad3 JP |
853 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
854 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
855 | int uc_promisc; | |
9d45abe1 WC |
856 | unsigned int promiscuity; |
857 | unsigned int allmulti; | |
1da177e4 | 858 | |
1da177e4 LT |
859 | |
860 | /* Protocol specific pointers */ | |
861 | ||
91da11f8 LB |
862 | #ifdef CONFIG_NET_DSA |
863 | void *dsa_ptr; /* dsa specific data */ | |
864 | #endif | |
1da177e4 | 865 | void *atalk_ptr; /* AppleTalk link */ |
fe2918b0 | 866 | void *ip_ptr; /* IPv4 specific data */ |
1da177e4 LT |
867 | void *dn_ptr; /* DECnet specific data */ |
868 | void *ip6_ptr; /* IPv6 specific data */ | |
869 | void *ec_ptr; /* Econet specific data */ | |
870 | void *ax25_ptr; /* AX.25 specific data */ | |
704232c2 JB |
871 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
872 | assign before registering */ | |
1da177e4 | 873 | |
9356b8fc ED |
874 | /* |
875 | * Cache line mostly used on receive path (including eth_type_trans()) | |
876 | */ | |
9356b8fc ED |
877 | unsigned long last_rx; /* Time of last Rx */ |
878 | /* Interface address info used in eth_type_trans() */ | |
f001fde5 JP |
879 | unsigned char *dev_addr; /* hw address, (before bcast |
880 | because most packets are | |
881 | unicast) */ | |
882 | ||
31278e71 JP |
883 | struct netdev_hw_addr_list dev_addrs; /* list of device |
884 | hw addresses */ | |
9356b8fc ED |
885 | |
886 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 887 | |
df334545 | 888 | #ifdef CONFIG_RPS |
0a9627f2 TH |
889 | struct kset *queues_kset; |
890 | ||
891 | struct netdev_rx_queue *_rx; | |
892 | ||
893 | /* Number of RX queues allocated at alloc_netdev_mq() time */ | |
894 | unsigned int num_rx_queues; | |
df334545 | 895 | #endif |
0a9627f2 | 896 | |
bb949fbd | 897 | struct netdev_queue rx_queue; |
e8a0464c DM |
898 | |
899 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; | |
fd2ea0a7 DM |
900 | |
901 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
e8a0464c | 902 | unsigned int num_tx_queues; |
fd2ea0a7 DM |
903 | |
904 | /* Number of TX queues currently active in device */ | |
905 | unsigned int real_num_tx_queues; | |
906 | ||
af356afa PM |
907 | /* root qdisc from userspace point of view */ |
908 | struct Qdisc *qdisc; | |
909 | ||
1da177e4 | 910 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
c3f26a26 | 911 | spinlock_t tx_global_lock; |
9356b8fc ED |
912 | /* |
913 | * One part is mostly used on xmit path (device) | |
914 | */ | |
9356b8fc | 915 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
916 | |
917 | /* | |
918 | * trans_start here is expensive for high speed devices on SMP, | |
919 | * please use netdev_queue->trans_start instead. | |
920 | */ | |
9356b8fc ED |
921 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
922 | ||
923 | int watchdog_timeo; /* used by dev_watchdog() */ | |
924 | struct timer_list watchdog_timer; | |
925 | ||
1da177e4 | 926 | /* Number of references to this device */ |
9356b8fc ED |
927 | atomic_t refcnt ____cacheline_aligned_in_smp; |
928 | ||
1da177e4 LT |
929 | /* delayed register/unregister */ |
930 | struct list_head todo_list; | |
1da177e4 LT |
931 | /* device index hash chain */ |
932 | struct hlist_node index_hlist; | |
933 | ||
e014debe | 934 | struct list_head link_watch_list; |
572a103d | 935 | |
1da177e4 LT |
936 | /* register/unregister state machine */ |
937 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 938 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
939 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
940 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
941 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 942 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
a2835763 PM |
943 | } reg_state:16; |
944 | ||
945 | enum { | |
946 | RTNL_LINK_INITIALIZED, | |
947 | RTNL_LINK_INITIALIZING, | |
948 | } rtnl_link_state:16; | |
1da177e4 | 949 | |
d314774c SH |
950 | /* Called from unregister, can be used to call free_netdev */ |
951 | void (*destructor)(struct net_device *dev); | |
1da177e4 | 952 | |
1da177e4 | 953 | #ifdef CONFIG_NETPOLL |
115c1d6e | 954 | struct netpoll_info *npinfo; |
1da177e4 | 955 | #endif |
eae792b7 | 956 | |
c346dca1 | 957 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
958 | /* Network namespace this network device is inside */ |
959 | struct net *nd_net; | |
c346dca1 | 960 | #endif |
4a1c5371 | 961 | |
4951704b DM |
962 | /* mid-layer private */ |
963 | void *ml_priv; | |
964 | ||
1da177e4 LT |
965 | /* bridge stuff */ |
966 | struct net_bridge_port *br_port; | |
b863ceb7 PM |
967 | /* macvlan */ |
968 | struct macvlan_port *macvlan_port; | |
eca9ebac PM |
969 | /* GARP */ |
970 | struct garp_port *garp_port; | |
1da177e4 | 971 | |
1da177e4 | 972 | /* class/net/name entry */ |
43cb76d9 | 973 | struct device dev; |
0c509a6c EB |
974 | /* space for optional device, statistics, and wireless sysfs groups */ |
975 | const struct attribute_group *sysfs_groups[4]; | |
38f7b870 PM |
976 | |
977 | /* rtnetlink link ops */ | |
978 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 979 | |
289c79a4 PM |
980 | /* VLAN feature mask */ |
981 | unsigned long vlan_features; | |
982 | ||
82cc1a7a PWJ |
983 | /* for setting kernel sock attribute on TCP connection setup */ |
984 | #define GSO_MAX_SIZE 65536 | |
985 | unsigned int gso_max_size; | |
d314774c | 986 | |
7a6b6f51 | 987 | #ifdef CONFIG_DCB |
2f90b865 | 988 | /* Data Center Bridging netlink ops */ |
32953543 | 989 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 AD |
990 | #endif |
991 | ||
4d288d57 YZ |
992 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
993 | /* max exchange id for FCoE LRO by ddp */ | |
994 | unsigned int fcoe_ddp_xid; | |
995 | #endif | |
15682bc4 PWJ |
996 | /* n-tuple filter list attached to this device */ |
997 | struct ethtool_rx_ntuple_list ethtool_ntuple_list; | |
1da177e4 | 998 | }; |
43cb76d9 | 999 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1000 | |
1001 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1002 | |
e8a0464c DM |
1003 | static inline |
1004 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1005 | unsigned int index) | |
1006 | { | |
1007 | return &dev->_tx[index]; | |
1008 | } | |
1009 | ||
1010 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1011 | void (*f)(struct net_device *, | |
1012 | struct netdev_queue *, | |
1013 | void *), | |
1014 | void *arg) | |
1015 | { | |
1016 | unsigned int i; | |
1017 | ||
1018 | for (i = 0; i < dev->num_tx_queues; i++) | |
1019 | f(dev, &dev->_tx[i], arg); | |
1020 | } | |
1021 | ||
c346dca1 YH |
1022 | /* |
1023 | * Net namespace inlines | |
1024 | */ | |
1025 | static inline | |
1026 | struct net *dev_net(const struct net_device *dev) | |
1027 | { | |
1028 | #ifdef CONFIG_NET_NS | |
1029 | return dev->nd_net; | |
1030 | #else | |
1031 | return &init_net; | |
1032 | #endif | |
1033 | } | |
1034 | ||
1035 | static inline | |
f5aa23fd | 1036 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
1037 | { |
1038 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
1039 | release_net(dev->nd_net); |
1040 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
1041 | #endif |
1042 | } | |
1043 | ||
cf85d08f LB |
1044 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1045 | { | |
1046 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1047 | if (dev->dsa_ptr != NULL) | |
1048 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1049 | #endif | |
1050 | ||
1051 | return 0; | |
1052 | } | |
1053 | ||
8a83a00b AB |
1054 | #ifndef CONFIG_NET_NS |
1055 | static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) | |
1056 | { | |
1057 | skb->dev = dev; | |
1058 | } | |
1059 | #else /* CONFIG_NET_NS */ | |
1060 | void skb_set_dev(struct sk_buff *skb, struct net_device *dev); | |
1061 | #endif | |
1062 | ||
396138f0 LB |
1063 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1064 | { | |
1065 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1066 | if (dev->dsa_ptr != NULL) | |
1067 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1068 | #endif | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
bea3348e SH |
1073 | /** |
1074 | * netdev_priv - access network device private data | |
1075 | * @dev: network device | |
1076 | * | |
1077 | * Get network device private data | |
1078 | */ | |
6472ce60 | 1079 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1080 | { |
1ce8e7b5 | 1081 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1082 | } |
1083 | ||
1da177e4 LT |
1084 | /* Set the sysfs physical device reference for the network logical device |
1085 | * if set prior to registration will cause a symlink during initialization. | |
1086 | */ | |
43cb76d9 | 1087 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1088 | |
384912ed MH |
1089 | /* Set the sysfs device type for the network logical device to allow |
1090 | * fin grained indentification of different network device types. For | |
1091 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. | |
1092 | */ | |
1093 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1094 | ||
3b582cc1 SH |
1095 | /** |
1096 | * netif_napi_add - initialize a napi context | |
1097 | * @dev: network device | |
1098 | * @napi: napi context | |
1099 | * @poll: polling function | |
1100 | * @weight: default weight | |
1101 | * | |
1102 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1103 | * *any* of the other napi related functions. | |
1104 | */ | |
d565b0a1 HX |
1105 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1106 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1107 | |
d8156534 AD |
1108 | /** |
1109 | * netif_napi_del - remove a napi context | |
1110 | * @napi: napi context | |
1111 | * | |
1112 | * netif_napi_del() removes a napi context from the network device napi list | |
1113 | */ | |
d565b0a1 HX |
1114 | void netif_napi_del(struct napi_struct *napi); |
1115 | ||
1116 | struct napi_gro_cb { | |
78a478d0 HX |
1117 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1118 | void *frag0; | |
1119 | ||
7489594c HX |
1120 | /* Length of frag0. */ |
1121 | unsigned int frag0_len; | |
1122 | ||
86911732 HX |
1123 | /* This indicates where we are processing relative to skb->data. */ |
1124 | int data_offset; | |
1125 | ||
d565b0a1 HX |
1126 | /* This is non-zero if the packet may be of the same flow. */ |
1127 | int same_flow; | |
1128 | ||
1129 | /* This is non-zero if the packet cannot be merged with the new skb. */ | |
1130 | int flush; | |
1131 | ||
1132 | /* Number of segments aggregated. */ | |
1133 | int count; | |
5d38a079 HX |
1134 | |
1135 | /* Free the skb? */ | |
1136 | int free; | |
d565b0a1 HX |
1137 | }; |
1138 | ||
1139 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1140 | |
1da177e4 | 1141 | struct packet_type { |
f2ccd8fa DM |
1142 | __be16 type; /* This is really htons(ether_type). */ |
1143 | struct net_device *dev; /* NULL is wildcarded here */ | |
1144 | int (*func) (struct sk_buff *, | |
1145 | struct net_device *, | |
1146 | struct packet_type *, | |
1147 | struct net_device *); | |
576a30eb HX |
1148 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
1149 | int features); | |
a430a43d | 1150 | int (*gso_send_check)(struct sk_buff *skb); |
d565b0a1 HX |
1151 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1152 | struct sk_buff *skb); | |
1153 | int (*gro_complete)(struct sk_buff *skb); | |
1da177e4 LT |
1154 | void *af_packet_priv; |
1155 | struct list_head list; | |
1156 | }; | |
1157 | ||
1158 | #include <linux/interrupt.h> | |
1159 | #include <linux/notifier.h> | |
1160 | ||
1da177e4 LT |
1161 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1162 | ||
7562f876 | 1163 | |
881d966b EB |
1164 | #define for_each_netdev(net, d) \ |
1165 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
1166 | #define for_each_netdev_reverse(net, d) \ |
1167 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
1168 | #define for_each_netdev_rcu(net, d) \ |
1169 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
1170 | #define for_each_netdev_safe(net, d, n) \ |
1171 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1172 | #define for_each_netdev_continue(net, d) \ | |
1173 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 1174 | #define for_each_netdev_continue_rcu(net, d) \ |
1175 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b | 1176 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 1177 | |
a050c33f DL |
1178 | static inline struct net_device *next_net_device(struct net_device *dev) |
1179 | { | |
1180 | struct list_head *lh; | |
1181 | struct net *net; | |
1182 | ||
c346dca1 | 1183 | net = dev_net(dev); |
a050c33f DL |
1184 | lh = dev->dev_list.next; |
1185 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1186 | } | |
1187 | ||
ce81b76a ED |
1188 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1189 | { | |
1190 | struct list_head *lh; | |
1191 | struct net *net; | |
1192 | ||
1193 | net = dev_net(dev); | |
1194 | lh = rcu_dereference(dev->dev_list.next); | |
1195 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1196 | } | |
1197 | ||
a050c33f DL |
1198 | static inline struct net_device *first_net_device(struct net *net) |
1199 | { | |
1200 | return list_empty(&net->dev_base_head) ? NULL : | |
1201 | net_device_entry(net->dev_base_head.next); | |
1202 | } | |
7562f876 | 1203 | |
1da177e4 LT |
1204 | extern int netdev_boot_setup_check(struct net_device *dev); |
1205 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
881d966b EB |
1206 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); |
1207 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1208 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1da177e4 LT |
1209 | extern void dev_add_pack(struct packet_type *pt); |
1210 | extern void dev_remove_pack(struct packet_type *pt); | |
1211 | extern void __dev_remove_pack(struct packet_type *pt); | |
1212 | ||
881d966b | 1213 | extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, |
1da177e4 | 1214 | unsigned short mask); |
881d966b | 1215 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
72c9528b | 1216 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
881d966b | 1217 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
1da177e4 LT |
1218 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
1219 | extern int dev_open(struct net_device *dev); | |
1220 | extern int dev_close(struct net_device *dev); | |
0187bdfb | 1221 | extern void dev_disable_lro(struct net_device *dev); |
1da177e4 LT |
1222 | extern int dev_queue_xmit(struct sk_buff *skb); |
1223 | extern int register_netdevice(struct net_device *dev); | |
44a0873d ED |
1224 | extern void unregister_netdevice_queue(struct net_device *dev, |
1225 | struct list_head *head); | |
9b5e383c | 1226 | extern void unregister_netdevice_many(struct list_head *head); |
44a0873d ED |
1227 | static inline void unregister_netdevice(struct net_device *dev) |
1228 | { | |
1229 | unregister_netdevice_queue(dev, NULL); | |
1230 | } | |
1231 | ||
1da177e4 LT |
1232 | extern void free_netdev(struct net_device *dev); |
1233 | extern void synchronize_net(void); | |
1234 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1235 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
937f1ba5 | 1236 | extern int init_dummy_netdev(struct net_device *dev); |
9d40bbda | 1237 | extern void netdev_resync_ops(struct net_device *dev); |
937f1ba5 | 1238 | |
ad7379d4 | 1239 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
881d966b EB |
1240 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1241 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
fb699dfd | 1242 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
1da177e4 LT |
1243 | extern int dev_restart(struct net_device *dev); |
1244 | #ifdef CONFIG_NETPOLL_TRAP | |
1245 | extern int netpoll_trap(void); | |
1246 | #endif | |
86911732 HX |
1247 | extern int skb_gro_receive(struct sk_buff **head, |
1248 | struct sk_buff *skb); | |
78a478d0 | 1249 | extern void skb_gro_reset_offset(struct sk_buff *skb); |
86911732 HX |
1250 | |
1251 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1252 | { | |
1253 | return NAPI_GRO_CB(skb)->data_offset; | |
1254 | } | |
1255 | ||
1256 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1257 | { | |
1258 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1259 | } | |
1260 | ||
1261 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1262 | { | |
1263 | NAPI_GRO_CB(skb)->data_offset += len; | |
1264 | } | |
1265 | ||
a5b1cf28 HX |
1266 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
1267 | unsigned int offset) | |
86911732 | 1268 | { |
a5b1cf28 HX |
1269 | return NAPI_GRO_CB(skb)->frag0 + offset; |
1270 | } | |
78a478d0 | 1271 | |
a5b1cf28 HX |
1272 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
1273 | { | |
1274 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1275 | } | |
78a478d0 | 1276 | |
a5b1cf28 HX |
1277 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
1278 | unsigned int offset) | |
1279 | { | |
1280 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
1281 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
1282 | return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; | |
86911732 | 1283 | } |
1da177e4 | 1284 | |
aa4b9f53 HX |
1285 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
1286 | { | |
78d3fd0b | 1287 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
aa4b9f53 HX |
1288 | } |
1289 | ||
36e7b1b8 HX |
1290 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
1291 | { | |
78d3fd0b HX |
1292 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
1293 | skb_network_offset(skb); | |
36e7b1b8 HX |
1294 | } |
1295 | ||
0c4e8581 SH |
1296 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
1297 | unsigned short type, | |
3b04ddde SH |
1298 | const void *daddr, const void *saddr, |
1299 | unsigned len) | |
0c4e8581 | 1300 | { |
f1ecfd5d | 1301 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 1302 | return 0; |
3b04ddde SH |
1303 | |
1304 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
1305 | } |
1306 | ||
b95cce35 SH |
1307 | static inline int dev_parse_header(const struct sk_buff *skb, |
1308 | unsigned char *haddr) | |
1309 | { | |
1310 | const struct net_device *dev = skb->dev; | |
1311 | ||
1b83336b | 1312 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 1313 | return 0; |
3b04ddde | 1314 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
1315 | } |
1316 | ||
1da177e4 LT |
1317 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
1318 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1319 | static inline int unregister_gifconf(unsigned int family) | |
1320 | { | |
1321 | return register_gifconf(family, NULL); | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Incoming packets are placed on per-cpu queues so that | |
1326 | * no locking is needed. | |
1327 | */ | |
d94d9fee | 1328 | struct softnet_data { |
37437bb2 | 1329 | struct Qdisc *output_queue; |
1da177e4 | 1330 | struct list_head poll_list; |
1da177e4 LT |
1331 | struct sk_buff *completion_queue; |
1332 | ||
0a9627f2 | 1333 | /* Elements below can be accessed between CPUs for RPS */ |
1e94d72f | 1334 | #ifdef CONFIG_SMP |
0a9627f2 | 1335 | struct call_single_data csd ____cacheline_aligned_in_smp; |
1e94d72f | 1336 | #endif |
0a9627f2 | 1337 | struct sk_buff_head input_pkt_queue; |
bea3348e | 1338 | struct napi_struct backlog; |
1da177e4 LT |
1339 | }; |
1340 | ||
0a9627f2 | 1341 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 LT |
1342 | |
1343 | #define HAVE_NETIF_QUEUE | |
1344 | ||
37437bb2 | 1345 | extern void __netif_schedule(struct Qdisc *q); |
1da177e4 | 1346 | |
86d804e1 | 1347 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 1348 | { |
79d16385 | 1349 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) |
37437bb2 | 1350 | __netif_schedule(txq->qdisc); |
86d804e1 DM |
1351 | } |
1352 | ||
fd2ea0a7 DM |
1353 | static inline void netif_tx_schedule_all(struct net_device *dev) |
1354 | { | |
1355 | unsigned int i; | |
1356 | ||
1357 | for (i = 0; i < dev->num_tx_queues; i++) | |
1358 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1359 | } | |
1360 | ||
d29f749e DJ |
1361 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
1362 | { | |
1363 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1364 | } | |
1365 | ||
bea3348e SH |
1366 | /** |
1367 | * netif_start_queue - allow transmit | |
1368 | * @dev: network device | |
1369 | * | |
1370 | * Allow upper layers to call the device hard_start_xmit routine. | |
1371 | */ | |
1da177e4 LT |
1372 | static inline void netif_start_queue(struct net_device *dev) |
1373 | { | |
e8a0464c | 1374 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1375 | } |
1376 | ||
fd2ea0a7 DM |
1377 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
1378 | { | |
1379 | unsigned int i; | |
1380 | ||
1381 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1382 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1383 | netif_tx_start_queue(txq); | |
1384 | } | |
1385 | } | |
1386 | ||
79d16385 | 1387 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 LT |
1388 | { |
1389 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 | 1390 | if (netpoll_trap()) { |
7b3d3e4f | 1391 | netif_tx_start_queue(dev_queue); |
1da177e4 | 1392 | return; |
5f286e11 | 1393 | } |
1da177e4 | 1394 | #endif |
79d16385 | 1395 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) |
37437bb2 | 1396 | __netif_schedule(dev_queue->qdisc); |
79d16385 DM |
1397 | } |
1398 | ||
d29f749e DJ |
1399 | /** |
1400 | * netif_wake_queue - restart transmit | |
1401 | * @dev: network device | |
1402 | * | |
1403 | * Allow upper layers to call the device hard_start_xmit routine. | |
1404 | * Used for flow control when transmit resources are available. | |
1405 | */ | |
79d16385 DM |
1406 | static inline void netif_wake_queue(struct net_device *dev) |
1407 | { | |
e8a0464c | 1408 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1409 | } |
1410 | ||
fd2ea0a7 DM |
1411 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
1412 | { | |
1413 | unsigned int i; | |
1414 | ||
1415 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1416 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1417 | netif_tx_wake_queue(txq); | |
1418 | } | |
1419 | } | |
1420 | ||
d29f749e DJ |
1421 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
1422 | { | |
1423 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1424 | } | |
1425 | ||
bea3348e SH |
1426 | /** |
1427 | * netif_stop_queue - stop transmitted packets | |
1428 | * @dev: network device | |
1429 | * | |
1430 | * Stop upper layers calling the device hard_start_xmit routine. | |
1431 | * Used for flow control when transmit resources are unavailable. | |
1432 | */ | |
1da177e4 LT |
1433 | static inline void netif_stop_queue(struct net_device *dev) |
1434 | { | |
e8a0464c | 1435 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1436 | } |
1437 | ||
fd2ea0a7 DM |
1438 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
1439 | { | |
1440 | unsigned int i; | |
1441 | ||
1442 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1443 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1444 | netif_tx_stop_queue(txq); | |
1445 | } | |
1446 | } | |
1447 | ||
d29f749e DJ |
1448 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
1449 | { | |
1450 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1451 | } | |
1452 | ||
bea3348e SH |
1453 | /** |
1454 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1455 | * @dev: network device | |
1456 | * | |
1457 | * Test if transmit queue on device is currently unable to send. | |
1458 | */ | |
1da177e4 LT |
1459 | static inline int netif_queue_stopped(const struct net_device *dev) |
1460 | { | |
e8a0464c | 1461 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1462 | } |
1463 | ||
c3f26a26 DM |
1464 | static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) |
1465 | { | |
1466 | return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); | |
1467 | } | |
1468 | ||
bea3348e SH |
1469 | /** |
1470 | * netif_running - test if up | |
1471 | * @dev: network device | |
1472 | * | |
1473 | * Test if the device has been brought up. | |
1474 | */ | |
1da177e4 LT |
1475 | static inline int netif_running(const struct net_device *dev) |
1476 | { | |
1477 | return test_bit(__LINK_STATE_START, &dev->state); | |
1478 | } | |
1479 | ||
f25f4e44 PWJ |
1480 | /* |
1481 | * Routines to manage the subqueues on a device. We only need start | |
1482 | * stop, and a check if it's stopped. All other device management is | |
1483 | * done at the overall netdevice level. | |
1484 | * Also test the device if we're multiqueue. | |
1485 | */ | |
bea3348e SH |
1486 | |
1487 | /** | |
1488 | * netif_start_subqueue - allow sending packets on subqueue | |
1489 | * @dev: network device | |
1490 | * @queue_index: sub queue index | |
1491 | * | |
1492 | * Start individual transmit queue of a device with multiple transmit queues. | |
1493 | */ | |
f25f4e44 PWJ |
1494 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
1495 | { | |
fd2ea0a7 | 1496 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
1497 | |
1498 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
1499 | } |
1500 | ||
bea3348e SH |
1501 | /** |
1502 | * netif_stop_subqueue - stop sending packets on subqueue | |
1503 | * @dev: network device | |
1504 | * @queue_index: sub queue index | |
1505 | * | |
1506 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1507 | */ | |
f25f4e44 PWJ |
1508 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
1509 | { | |
fd2ea0a7 | 1510 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
1511 | #ifdef CONFIG_NETPOLL_TRAP |
1512 | if (netpoll_trap()) | |
1513 | return; | |
1514 | #endif | |
7b3d3e4f | 1515 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
1516 | } |
1517 | ||
bea3348e SH |
1518 | /** |
1519 | * netif_subqueue_stopped - test status of subqueue | |
1520 | * @dev: network device | |
1521 | * @queue_index: sub queue index | |
1522 | * | |
1523 | * Check individual transmit queue of a device with multiple transmit queues. | |
1524 | */ | |
668f895a | 1525 | static inline int __netif_subqueue_stopped(const struct net_device *dev, |
f25f4e44 PWJ |
1526 | u16 queue_index) |
1527 | { | |
fd2ea0a7 | 1528 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
1529 | |
1530 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
1531 | } |
1532 | ||
668f895a PE |
1533 | static inline int netif_subqueue_stopped(const struct net_device *dev, |
1534 | struct sk_buff *skb) | |
1535 | { | |
1536 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1537 | } | |
bea3348e SH |
1538 | |
1539 | /** | |
1540 | * netif_wake_subqueue - allow sending packets on subqueue | |
1541 | * @dev: network device | |
1542 | * @queue_index: sub queue index | |
1543 | * | |
1544 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1545 | */ | |
f25f4e44 PWJ |
1546 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
1547 | { | |
fd2ea0a7 | 1548 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
1549 | #ifdef CONFIG_NETPOLL_TRAP |
1550 | if (netpoll_trap()) | |
1551 | return; | |
1552 | #endif | |
fd2ea0a7 | 1553 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) |
37437bb2 | 1554 | __netif_schedule(txq->qdisc); |
f25f4e44 PWJ |
1555 | } |
1556 | ||
bea3348e SH |
1557 | /** |
1558 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1559 | * @dev: network device | |
1560 | * | |
1561 | * Check if device has multiple transmit queues | |
bea3348e | 1562 | */ |
f25f4e44 PWJ |
1563 | static inline int netif_is_multiqueue(const struct net_device *dev) |
1564 | { | |
09e83b5d | 1565 | return (dev->num_tx_queues > 1); |
f25f4e44 | 1566 | } |
1da177e4 LT |
1567 | |
1568 | /* Use this variant when it is known for sure that it | |
0ef47309 ML |
1569 | * is executing from hardware interrupt context or with hardware interrupts |
1570 | * disabled. | |
1da177e4 | 1571 | */ |
bea3348e | 1572 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
1da177e4 LT |
1573 | |
1574 | /* Use this variant in places where it could be invoked | |
0ef47309 ML |
1575 | * from either hardware interrupt or other context, with hardware interrupts |
1576 | * either disabled or enabled. | |
1da177e4 | 1577 | */ |
56079431 | 1578 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 LT |
1579 | |
1580 | #define HAVE_NETIF_RX 1 | |
1581 | extern int netif_rx(struct sk_buff *skb); | |
1582 | extern int netif_rx_ni(struct sk_buff *skb); | |
1583 | #define HAVE_NETIF_RECEIVE_SKB 1 | |
1584 | extern int netif_receive_skb(struct sk_buff *skb); | |
5b252f0c | 1585 | extern gro_result_t dev_gro_receive(struct napi_struct *napi, |
96e93eab | 1586 | struct sk_buff *skb); |
c7c4b3b6 BH |
1587 | extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); |
1588 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, | |
d565b0a1 | 1589 | struct sk_buff *skb); |
96e93eab HX |
1590 | extern void napi_reuse_skb(struct napi_struct *napi, |
1591 | struct sk_buff *skb); | |
76620aaf | 1592 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
c7c4b3b6 | 1593 | extern gro_result_t napi_frags_finish(struct napi_struct *napi, |
5b252f0c BH |
1594 | struct sk_buff *skb, |
1595 | gro_result_t ret); | |
76620aaf | 1596 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); |
c7c4b3b6 | 1597 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); |
76620aaf HX |
1598 | |
1599 | static inline void napi_free_frags(struct napi_struct *napi) | |
1600 | { | |
1601 | kfree_skb(napi->skb); | |
1602 | napi->skb = NULL; | |
1603 | } | |
1604 | ||
bc1d0411 | 1605 | extern void netif_nit_deliver(struct sk_buff *skb); |
c2373ee9 | 1606 | extern int dev_valid_name(const char *name); |
881d966b EB |
1607 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
1608 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1da177e4 | 1609 | extern unsigned dev_get_flags(const struct net_device *); |
bd380811 | 1610 | extern int __dev_change_flags(struct net_device *, unsigned int flags); |
1da177e4 | 1611 | extern int dev_change_flags(struct net_device *, unsigned); |
bd380811 | 1612 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
cf04a4c7 | 1613 | extern int dev_change_name(struct net_device *, const char *); |
0b815a1a | 1614 | extern int dev_set_alias(struct net_device *, const char *, size_t); |
ce286d32 EB |
1615 | extern int dev_change_net_namespace(struct net_device *, |
1616 | struct net *, const char *); | |
1da177e4 LT |
1617 | extern int dev_set_mtu(struct net_device *, int); |
1618 | extern int dev_set_mac_address(struct net_device *, | |
1619 | struct sockaddr *); | |
f6a78bfc | 1620 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
fd2ea0a7 DM |
1621 | struct net_device *dev, |
1622 | struct netdev_queue *txq); | |
44540960 AB |
1623 | extern int dev_forward_skb(struct net_device *dev, |
1624 | struct sk_buff *skb); | |
1da177e4 | 1625 | |
20380731 | 1626 | extern int netdev_budget; |
1da177e4 LT |
1627 | |
1628 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
1629 | extern void netdev_run_todo(void); | |
1630 | ||
bea3348e SH |
1631 | /** |
1632 | * dev_put - release reference to device | |
1633 | * @dev: network device | |
1634 | * | |
9ef4429b | 1635 | * Release reference to device to allow it to be freed. |
bea3348e | 1636 | */ |
1da177e4 LT |
1637 | static inline void dev_put(struct net_device *dev) |
1638 | { | |
1639 | atomic_dec(&dev->refcnt); | |
1640 | } | |
1641 | ||
bea3348e SH |
1642 | /** |
1643 | * dev_hold - get reference to device | |
1644 | * @dev: network device | |
1645 | * | |
9ef4429b | 1646 | * Hold reference to device to keep it from being freed. |
bea3348e | 1647 | */ |
15333061 SH |
1648 | static inline void dev_hold(struct net_device *dev) |
1649 | { | |
1650 | atomic_inc(&dev->refcnt); | |
1651 | } | |
1da177e4 LT |
1652 | |
1653 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
1654 | * and _off may be called from IRQ context, but it is caller | |
1655 | * who is responsible for serialization of these calls. | |
b00055aa SR |
1656 | * |
1657 | * The name carrier is inappropriate, these functions should really be | |
1658 | * called netif_lowerlayer_*() because they represent the state of any | |
1659 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
1660 | */ |
1661 | ||
1662 | extern void linkwatch_fire_event(struct net_device *dev); | |
e014debe | 1663 | extern void linkwatch_forget_dev(struct net_device *dev); |
1da177e4 | 1664 | |
bea3348e SH |
1665 | /** |
1666 | * netif_carrier_ok - test if carrier present | |
1667 | * @dev: network device | |
1668 | * | |
1669 | * Check if carrier is present on device | |
1670 | */ | |
1da177e4 LT |
1671 | static inline int netif_carrier_ok(const struct net_device *dev) |
1672 | { | |
1673 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
1674 | } | |
1675 | ||
9d21493b ED |
1676 | extern unsigned long dev_trans_start(struct net_device *dev); |
1677 | ||
1da177e4 LT |
1678 | extern void __netdev_watchdog_up(struct net_device *dev); |
1679 | ||
0a242efc | 1680 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 1681 | |
0a242efc | 1682 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 1683 | |
bea3348e SH |
1684 | /** |
1685 | * netif_dormant_on - mark device as dormant. | |
1686 | * @dev: network device | |
1687 | * | |
1688 | * Mark device as dormant (as per RFC2863). | |
1689 | * | |
1690 | * The dormant state indicates that the relevant interface is not | |
1691 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
1692 | * in a "pending" state, waiting for some external event. For "on- | |
1693 | * demand" interfaces, this new state identifies the situation where the | |
1694 | * interface is waiting for events to place it in the up state. | |
1695 | * | |
1696 | */ | |
b00055aa SR |
1697 | static inline void netif_dormant_on(struct net_device *dev) |
1698 | { | |
1699 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1700 | linkwatch_fire_event(dev); | |
1701 | } | |
1702 | ||
bea3348e SH |
1703 | /** |
1704 | * netif_dormant_off - set device as not dormant. | |
1705 | * @dev: network device | |
1706 | * | |
1707 | * Device is not in dormant state. | |
1708 | */ | |
b00055aa SR |
1709 | static inline void netif_dormant_off(struct net_device *dev) |
1710 | { | |
1711 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
1712 | linkwatch_fire_event(dev); | |
1713 | } | |
1714 | ||
bea3348e SH |
1715 | /** |
1716 | * netif_dormant - test if carrier present | |
1717 | * @dev: network device | |
1718 | * | |
1719 | * Check if carrier is present on device | |
1720 | */ | |
b00055aa SR |
1721 | static inline int netif_dormant(const struct net_device *dev) |
1722 | { | |
1723 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
1724 | } | |
1725 | ||
1726 | ||
bea3348e SH |
1727 | /** |
1728 | * netif_oper_up - test if device is operational | |
1729 | * @dev: network device | |
1730 | * | |
1731 | * Check if carrier is operational | |
1732 | */ | |
d94d9fee ED |
1733 | static inline int netif_oper_up(const struct net_device *dev) |
1734 | { | |
b00055aa SR |
1735 | return (dev->operstate == IF_OPER_UP || |
1736 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
1737 | } | |
1738 | ||
bea3348e SH |
1739 | /** |
1740 | * netif_device_present - is device available or removed | |
1741 | * @dev: network device | |
1742 | * | |
1743 | * Check if device has not been removed from system. | |
1744 | */ | |
1da177e4 LT |
1745 | static inline int netif_device_present(struct net_device *dev) |
1746 | { | |
1747 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
1748 | } | |
1749 | ||
56079431 | 1750 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 1751 | |
56079431 | 1752 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
1753 | |
1754 | /* | |
1755 | * Network interface message level settings | |
1756 | */ | |
1757 | #define HAVE_NETIF_MSG 1 | |
1758 | ||
1759 | enum { | |
1760 | NETIF_MSG_DRV = 0x0001, | |
1761 | NETIF_MSG_PROBE = 0x0002, | |
1762 | NETIF_MSG_LINK = 0x0004, | |
1763 | NETIF_MSG_TIMER = 0x0008, | |
1764 | NETIF_MSG_IFDOWN = 0x0010, | |
1765 | NETIF_MSG_IFUP = 0x0020, | |
1766 | NETIF_MSG_RX_ERR = 0x0040, | |
1767 | NETIF_MSG_TX_ERR = 0x0080, | |
1768 | NETIF_MSG_TX_QUEUED = 0x0100, | |
1769 | NETIF_MSG_INTR = 0x0200, | |
1770 | NETIF_MSG_TX_DONE = 0x0400, | |
1771 | NETIF_MSG_RX_STATUS = 0x0800, | |
1772 | NETIF_MSG_PKTDATA = 0x1000, | |
1773 | NETIF_MSG_HW = 0x2000, | |
1774 | NETIF_MSG_WOL = 0x4000, | |
1775 | }; | |
1776 | ||
1777 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
1778 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
1779 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
1780 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
1781 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
1782 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
1783 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
1784 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
1785 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
1786 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
1787 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
1788 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
1789 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
1790 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
1791 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
1792 | ||
1793 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
1794 | { | |
1795 | /* use default */ | |
1796 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
1797 | return default_msg_enable_bits; | |
1798 | if (debug_value == 0) /* no output */ | |
1799 | return 0; | |
1800 | /* set low N bits */ | |
1801 | return (1 << debug_value) - 1; | |
1802 | } | |
1803 | ||
c773e847 | 1804 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 1805 | { |
c773e847 DM |
1806 | spin_lock(&txq->_xmit_lock); |
1807 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
1808 | } |
1809 | ||
fd2ea0a7 DM |
1810 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
1811 | { | |
1812 | spin_lock_bh(&txq->_xmit_lock); | |
1813 | txq->xmit_lock_owner = smp_processor_id(); | |
1814 | } | |
1815 | ||
c3f26a26 DM |
1816 | static inline int __netif_tx_trylock(struct netdev_queue *txq) |
1817 | { | |
1818 | int ok = spin_trylock(&txq->_xmit_lock); | |
1819 | if (likely(ok)) | |
1820 | txq->xmit_lock_owner = smp_processor_id(); | |
1821 | return ok; | |
1822 | } | |
1823 | ||
1824 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
1825 | { | |
1826 | txq->xmit_lock_owner = -1; | |
1827 | spin_unlock(&txq->_xmit_lock); | |
1828 | } | |
1829 | ||
1830 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
1831 | { | |
1832 | txq->xmit_lock_owner = -1; | |
1833 | spin_unlock_bh(&txq->_xmit_lock); | |
1834 | } | |
1835 | ||
08baf561 ED |
1836 | static inline void txq_trans_update(struct netdev_queue *txq) |
1837 | { | |
1838 | if (txq->xmit_lock_owner != -1) | |
1839 | txq->trans_start = jiffies; | |
1840 | } | |
1841 | ||
d29f749e DJ |
1842 | /** |
1843 | * netif_tx_lock - grab network device transmit lock | |
1844 | * @dev: network device | |
d29f749e DJ |
1845 | * |
1846 | * Get network device transmit lock | |
1847 | */ | |
22dd7495 JHS |
1848 | static inline void netif_tx_lock(struct net_device *dev) |
1849 | { | |
e8a0464c | 1850 | unsigned int i; |
c3f26a26 | 1851 | int cpu; |
c773e847 | 1852 | |
c3f26a26 DM |
1853 | spin_lock(&dev->tx_global_lock); |
1854 | cpu = smp_processor_id(); | |
e8a0464c DM |
1855 | for (i = 0; i < dev->num_tx_queues; i++) { |
1856 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
1857 | |
1858 | /* We are the only thread of execution doing a | |
1859 | * freeze, but we have to grab the _xmit_lock in | |
1860 | * order to synchronize with threads which are in | |
1861 | * the ->hard_start_xmit() handler and already | |
1862 | * checked the frozen bit. | |
1863 | */ | |
e8a0464c | 1864 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
1865 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
1866 | __netif_tx_unlock(txq); | |
e8a0464c | 1867 | } |
932ff279 HX |
1868 | } |
1869 | ||
1870 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
1871 | { | |
e8a0464c DM |
1872 | local_bh_disable(); |
1873 | netif_tx_lock(dev); | |
932ff279 HX |
1874 | } |
1875 | ||
932ff279 HX |
1876 | static inline void netif_tx_unlock(struct net_device *dev) |
1877 | { | |
e8a0464c DM |
1878 | unsigned int i; |
1879 | ||
1880 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1881 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 1882 | |
c3f26a26 DM |
1883 | /* No need to grab the _xmit_lock here. If the |
1884 | * queue is not stopped for another reason, we | |
1885 | * force a schedule. | |
1886 | */ | |
1887 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 1888 | netif_schedule_queue(txq); |
c3f26a26 DM |
1889 | } |
1890 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
1891 | } |
1892 | ||
1893 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
1894 | { | |
e8a0464c DM |
1895 | netif_tx_unlock(dev); |
1896 | local_bh_enable(); | |
932ff279 HX |
1897 | } |
1898 | ||
c773e847 | 1899 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 1900 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 1901 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
1902 | } \ |
1903 | } | |
1904 | ||
c773e847 | 1905 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 1906 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 1907 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
1908 | } \ |
1909 | } | |
1910 | ||
1da177e4 LT |
1911 | static inline void netif_tx_disable(struct net_device *dev) |
1912 | { | |
fd2ea0a7 | 1913 | unsigned int i; |
c3f26a26 | 1914 | int cpu; |
fd2ea0a7 | 1915 | |
c3f26a26 DM |
1916 | local_bh_disable(); |
1917 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
1918 | for (i = 0; i < dev->num_tx_queues; i++) { |
1919 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
1920 | |
1921 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 1922 | netif_tx_stop_queue(txq); |
c3f26a26 | 1923 | __netif_tx_unlock(txq); |
fd2ea0a7 | 1924 | } |
c3f26a26 | 1925 | local_bh_enable(); |
1da177e4 LT |
1926 | } |
1927 | ||
e308a5d8 DM |
1928 | static inline void netif_addr_lock(struct net_device *dev) |
1929 | { | |
1930 | spin_lock(&dev->addr_list_lock); | |
1931 | } | |
1932 | ||
1933 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
1934 | { | |
1935 | spin_lock_bh(&dev->addr_list_lock); | |
1936 | } | |
1937 | ||
1938 | static inline void netif_addr_unlock(struct net_device *dev) | |
1939 | { | |
1940 | spin_unlock(&dev->addr_list_lock); | |
1941 | } | |
1942 | ||
1943 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
1944 | { | |
1945 | spin_unlock_bh(&dev->addr_list_lock); | |
1946 | } | |
1947 | ||
f001fde5 | 1948 | /* |
31278e71 | 1949 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
1950 | * rcu_read_lock held. |
1951 | */ | |
1952 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 1953 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 1954 | |
1da177e4 LT |
1955 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
1956 | ||
1957 | extern void ether_setup(struct net_device *dev); | |
1958 | ||
1959 | /* Support for loadable net-drivers */ | |
f25f4e44 PWJ |
1960 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, |
1961 | void (*setup)(struct net_device *), | |
1962 | unsigned int queue_count); | |
1963 | #define alloc_netdev(sizeof_priv, name, setup) \ | |
1964 | alloc_netdev_mq(sizeof_priv, name, setup, 1) | |
1da177e4 LT |
1965 | extern int register_netdev(struct net_device *dev); |
1966 | extern void unregister_netdev(struct net_device *dev); | |
f001fde5 | 1967 | |
22bedad3 JP |
1968 | /* General hardware address lists handling functions */ |
1969 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
1970 | struct netdev_hw_addr_list *from_list, | |
1971 | int addr_len, unsigned char addr_type); | |
1972 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, | |
1973 | struct netdev_hw_addr_list *from_list, | |
1974 | int addr_len, unsigned char addr_type); | |
1975 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, | |
1976 | struct netdev_hw_addr_list *from_list, | |
1977 | int addr_len); | |
1978 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
1979 | struct netdev_hw_addr_list *from_list, | |
1980 | int addr_len); | |
1981 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); | |
1982 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); | |
1983 | ||
f001fde5 JP |
1984 | /* Functions used for device addresses handling */ |
1985 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
1986 | unsigned char addr_type); | |
1987 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
1988 | unsigned char addr_type); | |
1989 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
1990 | struct net_device *from_dev, | |
1991 | unsigned char addr_type); | |
1992 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
1993 | struct net_device *from_dev, | |
1994 | unsigned char addr_type); | |
a748ee24 JP |
1995 | extern void dev_addr_flush(struct net_device *dev); |
1996 | extern int dev_addr_init(struct net_device *dev); | |
1997 | ||
1998 | /* Functions used for unicast addresses handling */ | |
1999 | extern int dev_uc_add(struct net_device *dev, unsigned char *addr); | |
2000 | extern int dev_uc_del(struct net_device *dev, unsigned char *addr); | |
2001 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); | |
2002 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
2003 | extern void dev_uc_flush(struct net_device *dev); | |
2004 | extern void dev_uc_init(struct net_device *dev); | |
f001fde5 | 2005 | |
22bedad3 JP |
2006 | /* Functions used for multicast addresses handling */ |
2007 | extern int dev_mc_add(struct net_device *dev, unsigned char *addr); | |
2008 | extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); | |
2009 | extern int dev_mc_del(struct net_device *dev, unsigned char *addr); | |
2010 | extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); | |
2011 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
2012 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
2013 | extern void dev_mc_flush(struct net_device *dev); | |
2014 | extern void dev_mc_init(struct net_device *dev); | |
2015 | ||
4417da66 PM |
2016 | /* Functions used for secondary unicast and multicast support */ |
2017 | extern void dev_set_rx_mode(struct net_device *dev); | |
2018 | extern void __dev_set_rx_mode(struct net_device *dev); | |
dad9b335 WC |
2019 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
2020 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1da177e4 | 2021 | extern void netdev_state_change(struct net_device *dev); |
3ca5b404 | 2022 | extern int netdev_bonding_change(struct net_device *dev, |
75c78500 | 2023 | unsigned long event); |
d8a33ac4 | 2024 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 | 2025 | /* Load a device via the kmod */ |
881d966b | 2026 | extern void dev_load(struct net *net, const char *name); |
1da177e4 | 2027 | extern void dev_mcast_init(void); |
eeda3fd6 | 2028 | extern const struct net_device_stats *dev_get_stats(struct net_device *dev); |
d83345ad | 2029 | extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats); |
eeda3fd6 | 2030 | |
1da177e4 LT |
2031 | extern int netdev_max_backlog; |
2032 | extern int weight_p; | |
2033 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); | |
84fa7933 | 2034 | extern int skb_checksum_help(struct sk_buff *skb); |
576a30eb | 2035 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); |
fb286bb2 HX |
2036 | #ifdef CONFIG_BUG |
2037 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
2038 | #else | |
2039 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
2040 | { | |
2041 | } | |
2042 | #endif | |
1da177e4 LT |
2043 | /* rx skb timestamps */ |
2044 | extern void net_enable_timestamp(void); | |
2045 | extern void net_disable_timestamp(void); | |
2046 | ||
20380731 ACM |
2047 | #ifdef CONFIG_PROC_FS |
2048 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
2049 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
2050 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
2051 | #endif | |
2052 | ||
b8a9787e JV |
2053 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
2054 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
2055 | ||
cf04a4c7 | 2056 | extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); |
6579e57b | 2057 | |
20380731 ACM |
2058 | extern void linkwatch_run_queue(void); |
2059 | ||
b63365a2 HX |
2060 | unsigned long netdev_increment_features(unsigned long all, unsigned long one, |
2061 | unsigned long mask); | |
2062 | unsigned long netdev_fix_features(unsigned long features, const char *name); | |
7f353bf2 | 2063 | |
fc4a7489 PM |
2064 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
2065 | struct net_device *dev); | |
2066 | ||
bcd76111 | 2067 | static inline int net_gso_ok(int features, int gso_type) |
576a30eb | 2068 | { |
bcd76111 | 2069 | int feature = gso_type << NETIF_F_GSO_SHIFT; |
d6b4991a | 2070 | return (features & feature) == feature; |
576a30eb HX |
2071 | } |
2072 | ||
bcd76111 HX |
2073 | static inline int skb_gso_ok(struct sk_buff *skb, int features) |
2074 | { | |
278b2513 | 2075 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
a5bd8a13 | 2076 | (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
2077 | } |
2078 | ||
7967168c HX |
2079 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
2080 | { | |
a430a43d HX |
2081 | return skb_is_gso(skb) && |
2082 | (!skb_gso_ok(skb, dev->features) || | |
84fa7933 | 2083 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); |
7967168c HX |
2084 | } |
2085 | ||
82cc1a7a PWJ |
2086 | static inline void netif_set_gso_max_size(struct net_device *dev, |
2087 | unsigned int size) | |
2088 | { | |
2089 | dev->gso_max_size = size; | |
2090 | } | |
2091 | ||
acbbc071 ED |
2092 | extern int __skb_bond_should_drop(struct sk_buff *skb, |
2093 | struct net_device *master); | |
5d4e039b | 2094 | |
0641e4fb ED |
2095 | static inline int skb_bond_should_drop(struct sk_buff *skb, |
2096 | struct net_device *master) | |
7ea49ed7 | 2097 | { |
acbbc071 ED |
2098 | if (master) |
2099 | return __skb_bond_should_drop(skb, master); | |
7ea49ed7 DM |
2100 | return 0; |
2101 | } | |
2102 | ||
505d4f73 | 2103 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 PM |
2104 | |
2105 | static inline int dev_ethtool_get_settings(struct net_device *dev, | |
2106 | struct ethtool_cmd *cmd) | |
2107 | { | |
2108 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) | |
2109 | return -EOPNOTSUPP; | |
2110 | return dev->ethtool_ops->get_settings(dev, cmd); | |
2111 | } | |
2112 | ||
2113 | static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) | |
2114 | { | |
2115 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) | |
2116 | return 0; | |
2117 | return dev->ethtool_ops->get_rx_csum(dev); | |
2118 | } | |
2119 | ||
2120 | static inline u32 dev_ethtool_get_flags(struct net_device *dev) | |
2121 | { | |
2122 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) | |
2123 | return 0; | |
2124 | return dev->ethtool_ops->get_flags(dev); | |
2125 | } | |
571ba423 JP |
2126 | |
2127 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ | |
2128 | ||
2129 | /* netdev_printk helpers, similar to dev_printk */ | |
2130 | ||
2131 | static inline const char *netdev_name(const struct net_device *dev) | |
2132 | { | |
2133 | if (dev->reg_state != NETREG_REGISTERED) | |
2134 | return "(unregistered net_device)"; | |
2135 | return dev->name; | |
2136 | } | |
2137 | ||
2138 | #define netdev_printk(level, netdev, format, args...) \ | |
2139 | dev_printk(level, (netdev)->dev.parent, \ | |
2140 | "%s: " format, \ | |
2141 | netdev_name(netdev), ##args) | |
2142 | ||
2143 | #define netdev_emerg(dev, format, args...) \ | |
2144 | netdev_printk(KERN_EMERG, dev, format, ##args) | |
2145 | #define netdev_alert(dev, format, args...) \ | |
2146 | netdev_printk(KERN_ALERT, dev, format, ##args) | |
2147 | #define netdev_crit(dev, format, args...) \ | |
2148 | netdev_printk(KERN_CRIT, dev, format, ##args) | |
2149 | #define netdev_err(dev, format, args...) \ | |
2150 | netdev_printk(KERN_ERR, dev, format, ##args) | |
2151 | #define netdev_warn(dev, format, args...) \ | |
2152 | netdev_printk(KERN_WARNING, dev, format, ##args) | |
2153 | #define netdev_notice(dev, format, args...) \ | |
2154 | netdev_printk(KERN_NOTICE, dev, format, ##args) | |
2155 | #define netdev_info(dev, format, args...) \ | |
2156 | netdev_printk(KERN_INFO, dev, format, ##args) | |
2157 | ||
2158 | #if defined(DEBUG) | |
2159 | #define netdev_dbg(__dev, format, args...) \ | |
2160 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
2161 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2162 | #define netdev_dbg(__dev, format, args...) \ | |
2163 | do { \ | |
2164 | dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \ | |
2165 | netdev_name(__dev), ##args); \ | |
2166 | } while (0) | |
2167 | #else | |
2168 | #define netdev_dbg(__dev, format, args...) \ | |
2169 | ({ \ | |
2170 | if (0) \ | |
2171 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
2172 | 0; \ | |
2173 | }) | |
2174 | #endif | |
2175 | ||
2176 | #if defined(VERBOSE_DEBUG) | |
2177 | #define netdev_vdbg netdev_dbg | |
2178 | #else | |
2179 | ||
2180 | #define netdev_vdbg(dev, format, args...) \ | |
2181 | ({ \ | |
2182 | if (0) \ | |
2183 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
2184 | 0; \ | |
2185 | }) | |
2186 | #endif | |
2187 | ||
2188 | /* | |
2189 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
2190 | * of using a WARN/WARN_ON to get the message out, including the | |
2191 | * file/line information and a backtrace. | |
2192 | */ | |
2193 | #define netdev_WARN(dev, format, args...) \ | |
2194 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); | |
2195 | ||
b3d95c5c JP |
2196 | /* netif printk helpers, similar to netdev_printk */ |
2197 | ||
2198 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
2199 | do { \ | |
2200 | if (netif_msg_##type(priv)) \ | |
2201 | netdev_printk(level, (dev), fmt, ##args); \ | |
2202 | } while (0) | |
2203 | ||
2204 | #define netif_emerg(priv, type, dev, fmt, args...) \ | |
2205 | netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args) | |
2206 | #define netif_alert(priv, type, dev, fmt, args...) \ | |
2207 | netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args) | |
2208 | #define netif_crit(priv, type, dev, fmt, args...) \ | |
2209 | netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args) | |
2210 | #define netif_err(priv, type, dev, fmt, args...) \ | |
2211 | netif_printk(priv, type, KERN_ERR, dev, fmt, ##args) | |
2212 | #define netif_warn(priv, type, dev, fmt, args...) \ | |
2213 | netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args) | |
2214 | #define netif_notice(priv, type, dev, fmt, args...) \ | |
2215 | netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args) | |
2216 | #define netif_info(priv, type, dev, fmt, args...) \ | |
2217 | netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args) | |
2218 | ||
2219 | #if defined(DEBUG) | |
2220 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2221 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
2222 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2223 | #define netif_dbg(priv, type, netdev, format, args...) \ | |
2224 | do { \ | |
2225 | if (netif_msg_##type(priv)) \ | |
2226 | dynamic_dev_dbg((netdev)->dev.parent, \ | |
2227 | "%s: " format, \ | |
2228 | netdev_name(netdev), ##args); \ | |
2229 | } while (0) | |
2230 | #else | |
2231 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2232 | ({ \ | |
2233 | if (0) \ | |
2234 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
2235 | 0; \ | |
2236 | }) | |
2237 | #endif | |
2238 | ||
2239 | #if defined(VERBOSE_DEBUG) | |
2240 | #define netif_vdbg netdev_dbg | |
2241 | #else | |
2242 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
2243 | ({ \ | |
2244 | if (0) \ | |
2245 | netif_printk(KERN_DEBUG, dev, format, ##args); \ | |
2246 | 0; \ | |
2247 | }) | |
2248 | #endif | |
571ba423 | 2249 | |
1da177e4 LT |
2250 | #endif /* __KERNEL__ */ |
2251 | ||
385a154c | 2252 | #endif /* _LINUX_NETDEVICE_H */ |